--- /dev/null
+#ifndef __glut_h__
+#define __glut_h__
+
+/* Copyright (c) Mark J. Kilgard, 1994, 1995, 1996, 1998. */
+
+/* This program is freely distributable without licensing fees and is
+ provided without guarantee or warrantee expressed or implied. This
+ program is -not- in the public domain. */
+
+#if defined(_WIN32)
+
+/* GLUT 3.7 now tries to avoid including <windows.h>
+ to avoid name space pollution, but Win32's <GL/gl.h>
+ needs APIENTRY and WINGDIAPI defined properly. */
+# if 0
+ /* This would put tons of macros and crap in our clean name space. */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# else
+ /* XXX This is from Win32's <windef.h> */
+# ifndef APIENTRY
+# define GLUT_APIENTRY_DEFINED
+# if (_MSC_VER >= 800) || defined(_STDCALL_SUPPORTED) || defined(__BORLANDC__) || defined(__LCC__)
+# define APIENTRY __stdcall
+# else
+# define APIENTRY
+# endif
+# endif
+ /* XXX This is from Win32's <winnt.h> */
+# ifndef CALLBACK
+# if (defined(_M_MRX000) || defined(_M_IX86) || defined(_M_ALPHA) || defined(_M_PPC)) && !defined(MIDL_PASS) || defined(__LCC__)
+# define CALLBACK __stdcall
+# else
+# define CALLBACK
+# endif
+# endif
+ /* XXX Hack for lcc compiler. It doesn't support __declspec(dllimport), just __stdcall. */
+# if defined( __LCC__ )
+# undef WINGDIAPI
+# define WINGDIAPI __stdcall
+# else
+ /* XXX This is from Win32's <wingdi.h> and <winnt.h> */
+# ifndef WINGDIAPI
+# define GLUT_WINGDIAPI_DEFINED
+# define WINGDIAPI __declspec(dllimport)
+# endif
+# endif
+ /* XXX This is from Win32's <ctype.h> */
+# ifndef _WCHAR_T_DEFINED
+typedef unsigned short wchar_t;
+# define _WCHAR_T_DEFINED
+# endif
+# endif
+
+/* To disable automatic library usage for GLUT, define GLUT_NO_LIB_PRAGMA
+ in your compile preprocessor options. */
+# if !defined(GLUT_BUILDING_LIB) && !defined(GLUT_NO_LIB_PRAGMA)
+# pragma comment (lib, "winmm.lib") /* link with Windows MultiMedia lib */
+/* To enable automatic SGI OpenGL for Windows library usage for GLUT,
+ define GLUT_USE_SGI_OPENGL in your compile preprocessor options. */
+# ifdef GLUT_USE_SGI_OPENGL
+# pragma comment (lib, "opengl.lib") /* link with SGI OpenGL for Windows lib */
+# pragma comment (lib, "glu.lib") /* link with SGI OpenGL Utility lib */
+# pragma comment (lib, "glut.lib") /* link with Win32 GLUT for SGI OpenGL lib */
+# else
+# pragma comment (lib, "opengl32.lib") /* link with Microsoft OpenGL lib */
+# pragma comment (lib, "glu32.lib") /* link with Microsoft OpenGL Utility lib */
+# pragma comment (lib, "glut32.lib") /* link with Win32 GLUT lib */
+# endif
+# endif
+
+/* To disable supression of annoying warnings about floats being promoted
+ to doubles, define GLUT_NO_WARNING_DISABLE in your compile preprocessor
+ options. */
+# ifndef GLUT_NO_WARNING_DISABLE
+# pragma warning (disable:4244) /* Disable bogus VC++ 4.2 conversion warnings. */
+# pragma warning (disable:4305) /* VC++ 5.0 version of above warning. */
+# endif
+
+/* Win32 has an annoying issue where there are multiple C run-time
+ libraries (CRTs). If the executable is linked with a different CRT
+ from the GLUT DLL, the GLUT DLL will not share the same CRT static
+ data seen by the executable. In particular, atexit callbacks registered
+ in the executable will not be called if GLUT calls its (different)
+ exit routine). GLUT is typically built with the
+ "/MD" option (the CRT with multithreading DLL support), but the Visual
+ C++ linker default is "/ML" (the single threaded CRT).
+
+ One workaround to this issue is requiring users to always link with
+ the same CRT as GLUT is compiled with. That requires users supply a
+ non-standard option. GLUT 3.7 has its own built-in workaround where
+ the executable's "exit" function pointer is covertly passed to GLUT.
+ GLUT then calls the executable's exit function pointer to ensure that
+ any "atexit" calls registered by the application are called if GLUT
+ needs to exit.
+
+ Note that the __glut*WithExit routines should NEVER be called directly.
+ To avoid the atexit workaround, #define GLUT_DISABLE_ATEXIT_HACK. */
+
+/* XXX This is from Win32's <process.h> */
+# if !defined(_MSC_VER) && !defined(__cdecl)
+ /* Define __cdecl for non-Microsoft compilers. */
+# define __cdecl
+# define GLUT_DEFINED___CDECL
+# endif
+# ifndef _CRTIMP
+# ifdef _NTSDK
+ /* Definition compatible with NT SDK */
+# define _CRTIMP
+# else
+ /* Current definition */
+# ifdef _DLL
+# define _CRTIMP __declspec(dllimport)
+# else
+# define _CRTIMP
+# endif
+# endif
+# define GLUT_DEFINED__CRTIMP
+# endif
+
+/* GLUT API entry point declarations for Win32. */
+# ifdef GLUT_BUILDING_LIB
+# define GLUTAPI __declspec(dllexport)
+# else
+# ifdef _DLL
+# define GLUTAPI __declspec(dllimport)
+# else
+# define GLUTAPI extern
+# endif
+# endif
+
+/* GLUT callback calling convention for Win32. */
+# define GLUTCALLBACK __cdecl
+
+#endif /* _WIN32 */
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(_WIN32)
+# ifndef GLUT_BUILDING_LIB
+extern _CRTIMP void __cdecl exit(int);
+# endif
+#else
+/* non-Win32 case. */
+/* Define APIENTRY and CALLBACK to nothing if we aren't on Win32. */
+# define APIENTRY
+# define GLUT_APIENTRY_DEFINED
+# define CALLBACK
+/* Define GLUTAPI and GLUTCALLBACK as below if we aren't on Win32. */
+# define GLUTAPI extern
+# define GLUTCALLBACK
+/* Prototype exit for the non-Win32 case (see above). */
+extern void exit(int);
+#endif
+
+/**
+ GLUT API revision history:
+
+ GLUT_API_VERSION is updated to reflect incompatible GLUT
+ API changes (interface changes, semantic changes, deletions,
+ or additions).
+
+ GLUT_API_VERSION=1 First public release of GLUT. 11/29/94
+
+ GLUT_API_VERSION=2 Added support for OpenGL/GLX multisampling,
+ extension. Supports new input devices like tablet, dial and button
+ box, and Spaceball. Easy to query OpenGL extensions.
+
+ GLUT_API_VERSION=3 glutMenuStatus added.
+
+ GLUT_API_VERSION=4 glutInitDisplayString, glutWarpPointer,
+ glutBitmapLength, glutStrokeLength, glutWindowStatusFunc, dynamic
+ video resize subAPI, glutPostWindowRedisplay, glutKeyboardUpFunc,
+ glutSpecialUpFunc, glutIgnoreKeyRepeat, glutSetKeyRepeat,
+ glutJoystickFunc, glutForceJoystickFunc (NOT FINALIZED!).
+**/
+#ifndef GLUT_API_VERSION /* allow this to be overriden */
+#define GLUT_API_VERSION 3
+#endif
+
+/**
+ GLUT implementation revision history:
+
+ GLUT_XLIB_IMPLEMENTATION is updated to reflect both GLUT
+ API revisions and implementation revisions (ie, bug fixes).
+
+ GLUT_XLIB_IMPLEMENTATION=1 mjk's first public release of
+ GLUT Xlib-based implementation. 11/29/94
+
+ GLUT_XLIB_IMPLEMENTATION=2 mjk's second public release of
+ GLUT Xlib-based implementation providing GLUT version 2
+ interfaces.
+
+ GLUT_XLIB_IMPLEMENTATION=3 mjk's GLUT 2.2 images. 4/17/95
+
+ GLUT_XLIB_IMPLEMENTATION=4 mjk's GLUT 2.3 images. 6/?/95
+
+ GLUT_XLIB_IMPLEMENTATION=5 mjk's GLUT 3.0 images. 10/?/95
+
+ GLUT_XLIB_IMPLEMENTATION=7 mjk's GLUT 3.1+ with glutWarpPoitner. 7/24/96
+
+ GLUT_XLIB_IMPLEMENTATION=8 mjk's GLUT 3.1+ with glutWarpPoitner
+ and video resize. 1/3/97
+
+ GLUT_XLIB_IMPLEMENTATION=9 mjk's GLUT 3.4 release with early GLUT 4 routines.
+
+ GLUT_XLIB_IMPLEMENTATION=11 Mesa 2.5's GLUT 3.6 release.
+
+ GLUT_XLIB_IMPLEMENTATION=12 mjk's GLUT 3.6 release with early GLUT 4 routines + signal handling.
+
+ GLUT_XLIB_IMPLEMENTATION=13 mjk's GLUT 3.7 beta with GameGLUT support.
+
+ GLUT_XLIB_IMPLEMENTATION=14 mjk's GLUT 3.7 beta with f90gl friend interface.
+
+ GLUT_XLIB_IMPLEMENTATION=15 mjk's GLUT 3.7 beta sync'ed with Mesa <GL/glut.h>
+**/
+#ifndef GLUT_XLIB_IMPLEMENTATION /* Allow this to be overriden. */
+#define GLUT_XLIB_IMPLEMENTATION 15
+#endif
+
+/* Display mode bit masks. */
+#define GLUT_RGB 0
+#define GLUT_RGBA GLUT_RGB
+#define GLUT_INDEX 1
+#define GLUT_SINGLE 0
+#define GLUT_DOUBLE 2
+#define GLUT_ACCUM 4
+#define GLUT_ALPHA 8
+#define GLUT_DEPTH 16
+#define GLUT_STENCIL 32
+#if (GLUT_API_VERSION >= 2)
+#define GLUT_MULTISAMPLE 128
+#define GLUT_STEREO 256
+#endif
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_LUMINANCE 512
+#endif
+
+/* Mouse buttons. */
+#define GLUT_LEFT_BUTTON 0
+#define GLUT_MIDDLE_BUTTON 1
+#define GLUT_RIGHT_BUTTON 2
+
+/* Mouse button state. */
+#define GLUT_DOWN 0
+#define GLUT_UP 1
+
+#if (GLUT_API_VERSION >= 2)
+/* function keys */
+#define GLUT_KEY_F1 1
+#define GLUT_KEY_F2 2
+#define GLUT_KEY_F3 3
+#define GLUT_KEY_F4 4
+#define GLUT_KEY_F5 5
+#define GLUT_KEY_F6 6
+#define GLUT_KEY_F7 7
+#define GLUT_KEY_F8 8
+#define GLUT_KEY_F9 9
+#define GLUT_KEY_F10 10
+#define GLUT_KEY_F11 11
+#define GLUT_KEY_F12 12
+/* directional keys */
+#define GLUT_KEY_LEFT 100
+#define GLUT_KEY_UP 101
+#define GLUT_KEY_RIGHT 102
+#define GLUT_KEY_DOWN 103
+#define GLUT_KEY_PAGE_UP 104
+#define GLUT_KEY_PAGE_DOWN 105
+#define GLUT_KEY_HOME 106
+#define GLUT_KEY_END 107
+#define GLUT_KEY_INSERT 108
+#endif
+
+/* Entry/exit state. */
+#define GLUT_LEFT 0
+#define GLUT_ENTERED 1
+
+/* Menu usage state. */
+#define GLUT_MENU_NOT_IN_USE 0
+#define GLUT_MENU_IN_USE 1
+
+/* Visibility state. */
+#define GLUT_NOT_VISIBLE 0
+#define GLUT_VISIBLE 1
+
+/* Window status state. */
+#define GLUT_HIDDEN 0
+#define GLUT_FULLY_RETAINED 1
+#define GLUT_PARTIALLY_RETAINED 2
+#define GLUT_FULLY_COVERED 3
+
+/* Color index component selection values. */
+#define GLUT_RED 0
+#define GLUT_GREEN 1
+#define GLUT_BLUE 2
+
+#if defined(_WIN32)
+/* Stroke font constants (use these in GLUT program). */
+#define GLUT_STROKE_ROMAN ((void*)0)
+#define GLUT_STROKE_MONO_ROMAN ((void*)1)
+
+/* Bitmap font constants (use these in GLUT program). */
+#define GLUT_BITMAP_9_BY_15 ((void*)2)
+#define GLUT_BITMAP_8_BY_13 ((void*)3)
+#define GLUT_BITMAP_TIMES_ROMAN_10 ((void*)4)
+#define GLUT_BITMAP_TIMES_ROMAN_24 ((void*)5)
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_BITMAP_HELVETICA_10 ((void*)6)
+#define GLUT_BITMAP_HELVETICA_12 ((void*)7)
+#define GLUT_BITMAP_HELVETICA_18 ((void*)8)
+#endif
+#else
+/* Stroke font opaque addresses (use constants instead in source code). */
+GLUTAPI void *glutStrokeRoman;
+GLUTAPI void *glutStrokeMonoRoman;
+
+/* Stroke font constants (use these in GLUT program). */
+#define GLUT_STROKE_ROMAN (&glutStrokeRoman)
+#define GLUT_STROKE_MONO_ROMAN (&glutStrokeMonoRoman)
+
+/* Bitmap font opaque addresses (use constants instead in source code). */
+GLUTAPI void *glutBitmap9By15;
+GLUTAPI void *glutBitmap8By13;
+GLUTAPI void *glutBitmapTimesRoman10;
+GLUTAPI void *glutBitmapTimesRoman24;
+GLUTAPI void *glutBitmapHelvetica10;
+GLUTAPI void *glutBitmapHelvetica12;
+GLUTAPI void *glutBitmapHelvetica18;
+
+/* Bitmap font constants (use these in GLUT program). */
+#define GLUT_BITMAP_9_BY_15 (&glutBitmap9By15)
+#define GLUT_BITMAP_8_BY_13 (&glutBitmap8By13)
+#define GLUT_BITMAP_TIMES_ROMAN_10 (&glutBitmapTimesRoman10)
+#define GLUT_BITMAP_TIMES_ROMAN_24 (&glutBitmapTimesRoman24)
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_BITMAP_HELVETICA_10 (&glutBitmapHelvetica10)
+#define GLUT_BITMAP_HELVETICA_12 (&glutBitmapHelvetica12)
+#define GLUT_BITMAP_HELVETICA_18 (&glutBitmapHelvetica18)
+#endif
+#endif
+
+/* glutGet parameters. */
+#define GLUT_WINDOW_X ((GLenum) 100)
+#define GLUT_WINDOW_Y ((GLenum) 101)
+#define GLUT_WINDOW_WIDTH ((GLenum) 102)
+#define GLUT_WINDOW_HEIGHT ((GLenum) 103)
+#define GLUT_WINDOW_BUFFER_SIZE ((GLenum) 104)
+#define GLUT_WINDOW_STENCIL_SIZE ((GLenum) 105)
+#define GLUT_WINDOW_DEPTH_SIZE ((GLenum) 106)
+#define GLUT_WINDOW_RED_SIZE ((GLenum) 107)
+#define GLUT_WINDOW_GREEN_SIZE ((GLenum) 108)
+#define GLUT_WINDOW_BLUE_SIZE ((GLenum) 109)
+#define GLUT_WINDOW_ALPHA_SIZE ((GLenum) 110)
+#define GLUT_WINDOW_ACCUM_RED_SIZE ((GLenum) 111)
+#define GLUT_WINDOW_ACCUM_GREEN_SIZE ((GLenum) 112)
+#define GLUT_WINDOW_ACCUM_BLUE_SIZE ((GLenum) 113)
+#define GLUT_WINDOW_ACCUM_ALPHA_SIZE ((GLenum) 114)
+#define GLUT_WINDOW_DOUBLEBUFFER ((GLenum) 115)
+#define GLUT_WINDOW_RGBA ((GLenum) 116)
+#define GLUT_WINDOW_PARENT ((GLenum) 117)
+#define GLUT_WINDOW_NUM_CHILDREN ((GLenum) 118)
+#define GLUT_WINDOW_COLORMAP_SIZE ((GLenum) 119)
+#if (GLUT_API_VERSION >= 2)
+#define GLUT_WINDOW_NUM_SAMPLES ((GLenum) 120)
+#define GLUT_WINDOW_STEREO ((GLenum) 121)
+#endif
+#if (GLUT_API_VERSION >= 3)
+#define GLUT_WINDOW_CURSOR ((GLenum) 122)
+#endif
+#define GLUT_SCREEN_WIDTH ((GLenum) 200)
+#define GLUT_SCREEN_HEIGHT ((GLenum) 201)
+#define GLUT_SCREEN_WIDTH_MM ((GLenum) 202)
+#define GLUT_SCREEN_HEIGHT_MM ((GLenum) 203)
+#define GLUT_MENU_NUM_ITEMS ((GLenum) 300)
+#define GLUT_DISPLAY_MODE_POSSIBLE ((GLenum) 400)
+#define GLUT_INIT_WINDOW_X ((GLenum) 500)
+#define GLUT_INIT_WINDOW_Y ((GLenum) 501)
+#define GLUT_INIT_WINDOW_WIDTH ((GLenum) 502)
+#define GLUT_INIT_WINDOW_HEIGHT ((GLenum) 503)
+#define GLUT_INIT_DISPLAY_MODE ((GLenum) 504)
+#if (GLUT_API_VERSION >= 2)
+#define GLUT_ELAPSED_TIME ((GLenum) 700)
+#endif
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+#define GLUT_WINDOW_FORMAT_ID ((GLenum) 123)
+#endif
+
+#if (GLUT_API_VERSION >= 2)
+/* glutDeviceGet parameters. */
+#define GLUT_HAS_KEYBOARD ((GLenum) 600)
+#define GLUT_HAS_MOUSE ((GLenum) 601)
+#define GLUT_HAS_SPACEBALL ((GLenum) 602)
+#define GLUT_HAS_DIAL_AND_BUTTON_BOX ((GLenum) 603)
+#define GLUT_HAS_TABLET ((GLenum) 604)
+#define GLUT_NUM_MOUSE_BUTTONS ((GLenum) 605)
+#define GLUT_NUM_SPACEBALL_BUTTONS ((GLenum) 606)
+#define GLUT_NUM_BUTTON_BOX_BUTTONS ((GLenum) 607)
+#define GLUT_NUM_DIALS ((GLenum) 608)
+#define GLUT_NUM_TABLET_BUTTONS ((GLenum) 609)
+#endif
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+#define GLUT_DEVICE_IGNORE_KEY_REPEAT ((GLenum) 610)
+#define GLUT_DEVICE_KEY_REPEAT ((GLenum) 611)
+#define GLUT_HAS_JOYSTICK ((GLenum) 612)
+#define GLUT_OWNS_JOYSTICK ((GLenum) 613)
+#define GLUT_JOYSTICK_BUTTONS ((GLenum) 614)
+#define GLUT_JOYSTICK_AXES ((GLenum) 615)
+#define GLUT_JOYSTICK_POLL_RATE ((GLenum) 616)
+#endif
+
+#if (GLUT_API_VERSION >= 3)
+/* glutLayerGet parameters. */
+#define GLUT_OVERLAY_POSSIBLE ((GLenum) 800)
+#define GLUT_LAYER_IN_USE ((GLenum) 801)
+#define GLUT_HAS_OVERLAY ((GLenum) 802)
+#define GLUT_TRANSPARENT_INDEX ((GLenum) 803)
+#define GLUT_NORMAL_DAMAGED ((GLenum) 804)
+#define GLUT_OVERLAY_DAMAGED ((GLenum) 805)
+
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+/* glutVideoResizeGet parameters. */
+#define GLUT_VIDEO_RESIZE_POSSIBLE ((GLenum) 900)
+#define GLUT_VIDEO_RESIZE_IN_USE ((GLenum) 901)
+#define GLUT_VIDEO_RESIZE_X_DELTA ((GLenum) 902)
+#define GLUT_VIDEO_RESIZE_Y_DELTA ((GLenum) 903)
+#define GLUT_VIDEO_RESIZE_WIDTH_DELTA ((GLenum) 904)
+#define GLUT_VIDEO_RESIZE_HEIGHT_DELTA ((GLenum) 905)
+#define GLUT_VIDEO_RESIZE_X ((GLenum) 906)
+#define GLUT_VIDEO_RESIZE_Y ((GLenum) 907)
+#define GLUT_VIDEO_RESIZE_WIDTH ((GLenum) 908)
+#define GLUT_VIDEO_RESIZE_HEIGHT ((GLenum) 909)
+#endif
+
+/* glutUseLayer parameters. */
+#define GLUT_NORMAL ((GLenum) 0)
+#define GLUT_OVERLAY ((GLenum) 1)
+
+/* glutGetModifiers return mask. */
+#define GLUT_ACTIVE_SHIFT 1
+#define GLUT_ACTIVE_CTRL 2
+#define GLUT_ACTIVE_ALT 4
+
+/* glutSetCursor parameters. */
+/* Basic arrows. */
+#define GLUT_CURSOR_RIGHT_ARROW 0
+#define GLUT_CURSOR_LEFT_ARROW 1
+/* Symbolic cursor shapes. */
+#define GLUT_CURSOR_INFO 2
+#define GLUT_CURSOR_DESTROY 3
+#define GLUT_CURSOR_HELP 4
+#define GLUT_CURSOR_CYCLE 5
+#define GLUT_CURSOR_SPRAY 6
+#define GLUT_CURSOR_WAIT 7
+#define GLUT_CURSOR_TEXT 8
+#define GLUT_CURSOR_CROSSHAIR 9
+/* Directional cursors. */
+#define GLUT_CURSOR_UP_DOWN 10
+#define GLUT_CURSOR_LEFT_RIGHT 11
+/* Sizing cursors. */
+#define GLUT_CURSOR_TOP_SIDE 12
+#define GLUT_CURSOR_BOTTOM_SIDE 13
+#define GLUT_CURSOR_LEFT_SIDE 14
+#define GLUT_CURSOR_RIGHT_SIDE 15
+#define GLUT_CURSOR_TOP_LEFT_CORNER 16
+#define GLUT_CURSOR_TOP_RIGHT_CORNER 17
+#define GLUT_CURSOR_BOTTOM_RIGHT_CORNER 18
+#define GLUT_CURSOR_BOTTOM_LEFT_CORNER 19
+/* Inherit from parent window. */
+#define GLUT_CURSOR_INHERIT 100
+/* Blank cursor. */
+#define GLUT_CURSOR_NONE 101
+/* Fullscreen crosshair (if available). */
+#define GLUT_CURSOR_FULL_CROSSHAIR 102
+#endif
+
+/* GLUT initialization sub-API. */
+GLUTAPI void APIENTRY glutInit(int *argcp, char **argv);
+#if defined(_WIN32) && !defined(GLUT_DISABLE_ATEXIT_HACK)
+GLUTAPI void APIENTRY __glutInitWithExit(int *argcp, char **argv, void (__cdecl *exitfunc)(int));
+#ifndef GLUT_BUILDING_LIB
+static void APIENTRY glutInit_ATEXIT_HACK(int *argcp, char **argv) { __glutInitWithExit(argcp, argv, exit); }
+#define glutInit glutInit_ATEXIT_HACK
+#endif
+#endif
+GLUTAPI void APIENTRY glutInitDisplayMode(unsigned int mode);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI void APIENTRY glutInitDisplayString(const char *string);
+#endif
+GLUTAPI void APIENTRY glutInitWindowPosition(int x, int y);
+GLUTAPI void APIENTRY glutInitWindowSize(int width, int height);
+GLUTAPI void APIENTRY glutMainLoop(void);
+
+/* GLUT window sub-API. */
+GLUTAPI int APIENTRY glutCreateWindow(const char *title);
+#if defined(_WIN32) && !defined(GLUT_DISABLE_ATEXIT_HACK)
+GLUTAPI int APIENTRY __glutCreateWindowWithExit(const char *title, void (__cdecl *exitfunc)(int));
+#ifndef GLUT_BUILDING_LIB
+static int APIENTRY glutCreateWindow_ATEXIT_HACK(const char *title) { return __glutCreateWindowWithExit(title, exit); }
+#define glutCreateWindow glutCreateWindow_ATEXIT_HACK
+#endif
+#endif
+GLUTAPI int APIENTRY glutCreateSubWindow(int win, int x, int y, int width, int height);
+GLUTAPI void APIENTRY glutDestroyWindow(int win);
+GLUTAPI void APIENTRY glutPostRedisplay(void);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 11)
+GLUTAPI void APIENTRY glutPostWindowRedisplay(int win);
+#endif
+GLUTAPI void APIENTRY glutSwapBuffers(void);
+GLUTAPI int APIENTRY glutGetWindow(void);
+GLUTAPI void APIENTRY glutSetWindow(int win);
+GLUTAPI void APIENTRY glutSetWindowTitle(const char *title);
+GLUTAPI void APIENTRY glutSetIconTitle(const char *title);
+GLUTAPI void APIENTRY glutPositionWindow(int x, int y);
+GLUTAPI void APIENTRY glutReshapeWindow(int width, int height);
+GLUTAPI void APIENTRY glutPopWindow(void);
+GLUTAPI void APIENTRY glutPushWindow(void);
+GLUTAPI void APIENTRY glutIconifyWindow(void);
+GLUTAPI void APIENTRY glutShowWindow(void);
+GLUTAPI void APIENTRY glutHideWindow(void);
+#if (GLUT_API_VERSION >= 3)
+GLUTAPI void APIENTRY glutFullScreen(void);
+GLUTAPI void APIENTRY glutSetCursor(int cursor);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI void APIENTRY glutWarpPointer(int x, int y);
+#endif
+
+/* GLUT overlay sub-API. */
+GLUTAPI void APIENTRY glutEstablishOverlay(void);
+GLUTAPI void APIENTRY glutRemoveOverlay(void);
+GLUTAPI void APIENTRY glutUseLayer(GLenum layer);
+GLUTAPI void APIENTRY glutPostOverlayRedisplay(void);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 11)
+GLUTAPI void APIENTRY glutPostWindowOverlayRedisplay(int win);
+#endif
+GLUTAPI void APIENTRY glutShowOverlay(void);
+GLUTAPI void APIENTRY glutHideOverlay(void);
+#endif
+
+/* GLUT menu sub-API. */
+GLUTAPI int APIENTRY glutCreateMenu(void (GLUTCALLBACK *func)(int));
+#if defined(_WIN32) && !defined(GLUT_DISABLE_ATEXIT_HACK)
+GLUTAPI int APIENTRY __glutCreateMenuWithExit(void (GLUTCALLBACK *func)(int), void (__cdecl *exitfunc)(int));
+#ifndef GLUT_BUILDING_LIB
+static int APIENTRY glutCreateMenu_ATEXIT_HACK(void (GLUTCALLBACK *func)(int)) { return __glutCreateMenuWithExit(func, exit); }
+#define glutCreateMenu glutCreateMenu_ATEXIT_HACK
+#endif
+#endif
+GLUTAPI void APIENTRY glutDestroyMenu(int menu);
+GLUTAPI int APIENTRY glutGetMenu(void);
+GLUTAPI void APIENTRY glutSetMenu(int menu);
+GLUTAPI void APIENTRY glutAddMenuEntry(const char *label, int value);
+GLUTAPI void APIENTRY glutAddSubMenu(const char *label, int submenu);
+GLUTAPI void APIENTRY glutChangeToMenuEntry(int item, const char *label, int value);
+GLUTAPI void APIENTRY glutChangeToSubMenu(int item, const char *label, int submenu);
+GLUTAPI void APIENTRY glutRemoveMenuItem(int item);
+GLUTAPI void APIENTRY glutAttachMenu(int button);
+GLUTAPI void APIENTRY glutDetachMenu(int button);
+
+/* GLUT window callback sub-API. */
+GLUTAPI void APIENTRY glutDisplayFunc(void (GLUTCALLBACK *func)(void));
+GLUTAPI void APIENTRY glutReshapeFunc(void (GLUTCALLBACK *func)(int width, int height));
+GLUTAPI void APIENTRY glutKeyboardFunc(void (GLUTCALLBACK *func)(unsigned char key, int x, int y));
+GLUTAPI void APIENTRY glutMouseFunc(void (GLUTCALLBACK *func)(int button, int state, int x, int y));
+GLUTAPI void APIENTRY glutMotionFunc(void (GLUTCALLBACK *func)(int x, int y));
+GLUTAPI void APIENTRY glutPassiveMotionFunc(void (GLUTCALLBACK *func)(int x, int y));
+GLUTAPI void APIENTRY glutEntryFunc(void (GLUTCALLBACK *func)(int state));
+GLUTAPI void APIENTRY glutVisibilityFunc(void (GLUTCALLBACK *func)(int state));
+GLUTAPI void APIENTRY glutIdleFunc(void (GLUTCALLBACK *func)(void));
+GLUTAPI void APIENTRY glutTimerFunc(unsigned int millis, void (GLUTCALLBACK *func)(int value), int value);
+GLUTAPI void APIENTRY glutMenuStateFunc(void (GLUTCALLBACK *func)(int state));
+#if (GLUT_API_VERSION >= 2)
+GLUTAPI void APIENTRY glutSpecialFunc(void (GLUTCALLBACK *func)(int key, int x, int y));
+GLUTAPI void APIENTRY glutSpaceballMotionFunc(void (GLUTCALLBACK *func)(int x, int y, int z));
+GLUTAPI void APIENTRY glutSpaceballRotateFunc(void (GLUTCALLBACK *func)(int x, int y, int z));
+GLUTAPI void APIENTRY glutSpaceballButtonFunc(void (GLUTCALLBACK *func)(int button, int state));
+GLUTAPI void APIENTRY glutButtonBoxFunc(void (GLUTCALLBACK *func)(int button, int state));
+GLUTAPI void APIENTRY glutDialsFunc(void (GLUTCALLBACK *func)(int dial, int value));
+GLUTAPI void APIENTRY glutTabletMotionFunc(void (GLUTCALLBACK *func)(int x, int y));
+GLUTAPI void APIENTRY glutTabletButtonFunc(void (GLUTCALLBACK *func)(int button, int state, int x, int y));
+#if (GLUT_API_VERSION >= 3)
+GLUTAPI void APIENTRY glutMenuStatusFunc(void (GLUTCALLBACK *func)(int status, int x, int y));
+GLUTAPI void APIENTRY glutOverlayDisplayFunc(void (GLUTCALLBACK *func)(void));
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI void APIENTRY glutWindowStatusFunc(void (GLUTCALLBACK *func)(int state));
+#endif
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+GLUTAPI void APIENTRY glutKeyboardUpFunc(void (GLUTCALLBACK *func)(unsigned char key, int x, int y));
+GLUTAPI void APIENTRY glutSpecialUpFunc(void (GLUTCALLBACK *func)(int key, int x, int y));
+GLUTAPI void APIENTRY glutJoystickFunc(void (GLUTCALLBACK *func)(unsigned int buttonMask, int x, int y, int z), int pollInterval);
+#endif
+#endif
+#endif
+
+/* GLUT color index sub-API. */
+GLUTAPI void APIENTRY glutSetColor(int, GLfloat red, GLfloat green, GLfloat blue);
+GLUTAPI GLfloat APIENTRY glutGetColor(int ndx, int component);
+GLUTAPI void APIENTRY glutCopyColormap(int win);
+
+/* GLUT state retrieval sub-API. */
+GLUTAPI int APIENTRY glutGet(GLenum type);
+GLUTAPI int APIENTRY glutDeviceGet(GLenum type);
+#if (GLUT_API_VERSION >= 2)
+/* GLUT extension support sub-API */
+GLUTAPI int APIENTRY glutExtensionSupported(const char *name);
+#endif
+#if (GLUT_API_VERSION >= 3)
+GLUTAPI int APIENTRY glutGetModifiers(void);
+GLUTAPI int APIENTRY glutLayerGet(GLenum type);
+#endif
+
+/* GLUT font sub-API */
+GLUTAPI void APIENTRY glutBitmapCharacter(void *font, int character);
+GLUTAPI int APIENTRY glutBitmapWidth(void *font, int character);
+GLUTAPI void APIENTRY glutStrokeCharacter(void *font, int character);
+GLUTAPI int APIENTRY glutStrokeWidth(void *font, int character);
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+GLUTAPI int APIENTRY glutBitmapLength(void *font, const unsigned char *string);
+GLUTAPI int APIENTRY glutStrokeLength(void *font, const unsigned char *string);
+#endif
+
+/* GLUT pre-built models sub-API */
+GLUTAPI void APIENTRY glutWireSphere(GLdouble radius, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutSolidSphere(GLdouble radius, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutWireCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutSolidCone(GLdouble base, GLdouble height, GLint slices, GLint stacks);
+GLUTAPI void APIENTRY glutWireCube(GLdouble size);
+GLUTAPI void APIENTRY glutSolidCube(GLdouble size);
+GLUTAPI void APIENTRY glutWireTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
+GLUTAPI void APIENTRY glutSolidTorus(GLdouble innerRadius, GLdouble outerRadius, GLint sides, GLint rings);
+GLUTAPI void APIENTRY glutWireDodecahedron(void);
+GLUTAPI void APIENTRY glutSolidDodecahedron(void);
+GLUTAPI void APIENTRY glutWireTeapot(GLdouble size);
+GLUTAPI void APIENTRY glutSolidTeapot(GLdouble size);
+GLUTAPI void APIENTRY glutWireOctahedron(void);
+GLUTAPI void APIENTRY glutSolidOctahedron(void);
+GLUTAPI void APIENTRY glutWireTetrahedron(void);
+GLUTAPI void APIENTRY glutSolidTetrahedron(void);
+GLUTAPI void APIENTRY glutWireIcosahedron(void);
+GLUTAPI void APIENTRY glutSolidIcosahedron(void);
+
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 9)
+/* GLUT video resize sub-API. */
+GLUTAPI int APIENTRY glutVideoResizeGet(GLenum param);
+GLUTAPI void APIENTRY glutSetupVideoResizing(void);
+GLUTAPI void APIENTRY glutStopVideoResizing(void);
+GLUTAPI void APIENTRY glutVideoResize(int x, int y, int width, int height);
+GLUTAPI void APIENTRY glutVideoPan(int x, int y, int width, int height);
+
+/* GLUT debugging sub-API. */
+GLUTAPI void APIENTRY glutReportErrors(void);
+#endif
+
+#if (GLUT_API_VERSION >= 4 || GLUT_XLIB_IMPLEMENTATION >= 13)
+/* GLUT device control sub-API. */
+/* glutSetKeyRepeat modes. */
+#define GLUT_KEY_REPEAT_OFF 0
+#define GLUT_KEY_REPEAT_ON 1
+#define GLUT_KEY_REPEAT_DEFAULT 2
+
+/* Joystick button masks. */
+#define GLUT_JOYSTICK_BUTTON_A 1
+#define GLUT_JOYSTICK_BUTTON_B 2
+#define GLUT_JOYSTICK_BUTTON_C 4
+#define GLUT_JOYSTICK_BUTTON_D 8
+
+GLUTAPI void APIENTRY glutIgnoreKeyRepeat(int ignore);
+GLUTAPI void APIENTRY glutSetKeyRepeat(int repeatMode);
+GLUTAPI void APIENTRY glutForceJoystickFunc(void);
+
+/* GLUT game mode sub-API. */
+/* glutGameModeGet. */
+#define GLUT_GAME_MODE_ACTIVE ((GLenum) 0)
+#define GLUT_GAME_MODE_POSSIBLE ((GLenum) 1)
+#define GLUT_GAME_MODE_WIDTH ((GLenum) 2)
+#define GLUT_GAME_MODE_HEIGHT ((GLenum) 3)
+#define GLUT_GAME_MODE_PIXEL_DEPTH ((GLenum) 4)
+#define GLUT_GAME_MODE_REFRESH_RATE ((GLenum) 5)
+#define GLUT_GAME_MODE_DISPLAY_CHANGED ((GLenum) 6)
+
+GLUTAPI void APIENTRY glutGameModeString(const char *string);
+GLUTAPI int APIENTRY glutEnterGameMode(void);
+GLUTAPI void APIENTRY glutLeaveGameMode(void);
+GLUTAPI int APIENTRY glutGameModeGet(GLenum mode);
+#endif
+
+#ifdef __cplusplus
+}
+
+#endif
+
+#ifdef GLUT_APIENTRY_DEFINED
+# undef GLUT_APIENTRY_DEFINED
+# undef APIENTRY
+#endif
+
+#ifdef GLUT_WINGDIAPI_DEFINED
+# undef GLUT_WINGDIAPI_DEFINED
+# undef WINGDIAPI
+#endif
+
+#ifdef GLUT_DEFINED___CDECL
+# undef GLUT_DEFINED___CDECL
+# undef __cdecl
+#endif
+
+#ifdef GLUT_DEFINED__CRTIMP
+# undef GLUT_DEFINED__CRTIMP
+# undef _CRTIMP
+#endif
+
+#endif /* __glut_h__ */
--- /dev/null
+/*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AVCODEC_H
+#define AVCODEC_AVCODEC_H
+
+/**
+ * @file
+ * external API header
+ */
+
+#include <errno.h>
+#include "libavcore/samplefmt.h"
+#include "libavutil/avutil.h"
+#include "libavutil/cpu.h"
+
+#define LIBAVCODEC_VERSION_MAJOR 52
+#define LIBAVCODEC_VERSION_MINOR 108
+#define LIBAVCODEC_VERSION_MICRO 0
+
+#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
+ LIBAVCODEC_VERSION_MINOR, \
+ LIBAVCODEC_VERSION_MICRO)
+#define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \
+ LIBAVCODEC_VERSION_MINOR, \
+ LIBAVCODEC_VERSION_MICRO)
+#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
+
+#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
+
+/**
+ * Those FF_API_* defines are not part of public API.
+ * They may change, break or disappear at any time.
+ */
+#ifndef FF_API_PALETTE_CONTROL
+#define FF_API_PALETTE_CONTROL (LIBAVCODEC_VERSION_MAJOR < 54)
+#endif
+#ifndef FF_API_MM_FLAGS
+#define FF_API_MM_FLAGS (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_OPT_SHOW
+#define FF_API_OPT_SHOW (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_AUDIO_OLD
+#define FF_API_AUDIO_OLD (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_VIDEO_OLD
+#define FF_API_VIDEO_OLD (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_SUBTITLE_OLD
+#define FF_API_SUBTITLE_OLD (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_USE_LPC
+#define FF_API_USE_LPC (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_SET_STRING_OLD
+#define FF_API_SET_STRING_OLD (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_INOFFICIAL
+#define FF_API_INOFFICIAL (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_OLD_SAMPLE_FMT
+#define FF_API_OLD_SAMPLE_FMT (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_OLD_AUDIOCONVERT
+#define FF_API_OLD_AUDIOCONVERT (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+# define FF_INTERNALC_MEM_TYPE unsigned int
+#else
+# define FF_INTERNALC_MEM_TYPE size_t
+#endif
+
+/**
+ * Identify the syntax and semantics of the bitstream.
+ * The principle is roughly:
+ * Two decoders with the same ID can decode the same streams.
+ * Two encoders with the same ID can encode compatible streams.
+ * There may be slight deviations from the principle due to implementation
+ * details.
+ *
+ * If you add a codec ID to this list, add it so that
+ * 1. no value of a existing codec ID changes (that would break ABI),
+ * 2. it is as close as possible to similar codecs.
+ */
+enum CodecID {
+ CODEC_ID_NONE,
+
+ /* video codecs */
+ CODEC_ID_MPEG1VIDEO,
+ CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
+ CODEC_ID_MPEG2VIDEO_XVMC,
+ CODEC_ID_H261,
+ CODEC_ID_H263,
+ CODEC_ID_RV10,
+ CODEC_ID_RV20,
+ CODEC_ID_MJPEG,
+ CODEC_ID_MJPEGB,
+ CODEC_ID_LJPEG,
+ CODEC_ID_SP5X,
+ CODEC_ID_JPEGLS,
+ CODEC_ID_MPEG4,
+ CODEC_ID_RAWVIDEO,
+ CODEC_ID_MSMPEG4V1,
+ CODEC_ID_MSMPEG4V2,
+ CODEC_ID_MSMPEG4V3,
+ CODEC_ID_WMV1,
+ CODEC_ID_WMV2,
+ CODEC_ID_H263P,
+ CODEC_ID_H263I,
+ CODEC_ID_FLV1,
+ CODEC_ID_SVQ1,
+ CODEC_ID_SVQ3,
+ CODEC_ID_DVVIDEO,
+ CODEC_ID_HUFFYUV,
+ CODEC_ID_CYUV,
+ CODEC_ID_H264,
+ CODEC_ID_INDEO3,
+ CODEC_ID_VP3,
+ CODEC_ID_THEORA,
+ CODEC_ID_ASV1,
+ CODEC_ID_ASV2,
+ CODEC_ID_FFV1,
+ CODEC_ID_4XM,
+ CODEC_ID_VCR1,
+ CODEC_ID_CLJR,
+ CODEC_ID_MDEC,
+ CODEC_ID_ROQ,
+ CODEC_ID_INTERPLAY_VIDEO,
+ CODEC_ID_XAN_WC3,
+ CODEC_ID_XAN_WC4,
+ CODEC_ID_RPZA,
+ CODEC_ID_CINEPAK,
+ CODEC_ID_WS_VQA,
+ CODEC_ID_MSRLE,
+ CODEC_ID_MSVIDEO1,
+ CODEC_ID_IDCIN,
+ CODEC_ID_8BPS,
+ CODEC_ID_SMC,
+ CODEC_ID_FLIC,
+ CODEC_ID_TRUEMOTION1,
+ CODEC_ID_VMDVIDEO,
+ CODEC_ID_MSZH,
+ CODEC_ID_ZLIB,
+ CODEC_ID_QTRLE,
+ CODEC_ID_SNOW,
+ CODEC_ID_TSCC,
+ CODEC_ID_ULTI,
+ CODEC_ID_QDRAW,
+ CODEC_ID_VIXL,
+ CODEC_ID_QPEG,
+#if LIBAVCODEC_VERSION_MAJOR < 53
+ CODEC_ID_XVID,
+#endif
+ CODEC_ID_PNG,
+ CODEC_ID_PPM,
+ CODEC_ID_PBM,
+ CODEC_ID_PGM,
+ CODEC_ID_PGMYUV,
+ CODEC_ID_PAM,
+ CODEC_ID_FFVHUFF,
+ CODEC_ID_RV30,
+ CODEC_ID_RV40,
+ CODEC_ID_VC1,
+ CODEC_ID_WMV3,
+ CODEC_ID_LOCO,
+ CODEC_ID_WNV1,
+ CODEC_ID_AASC,
+ CODEC_ID_INDEO2,
+ CODEC_ID_FRAPS,
+ CODEC_ID_TRUEMOTION2,
+ CODEC_ID_BMP,
+ CODEC_ID_CSCD,
+ CODEC_ID_MMVIDEO,
+ CODEC_ID_ZMBV,
+ CODEC_ID_AVS,
+ CODEC_ID_SMACKVIDEO,
+ CODEC_ID_NUV,
+ CODEC_ID_KMVC,
+ CODEC_ID_FLASHSV,
+ CODEC_ID_CAVS,
+ CODEC_ID_JPEG2000,
+ CODEC_ID_VMNC,
+ CODEC_ID_VP5,
+ CODEC_ID_VP6,
+ CODEC_ID_VP6F,
+ CODEC_ID_TARGA,
+ CODEC_ID_DSICINVIDEO,
+ CODEC_ID_TIERTEXSEQVIDEO,
+ CODEC_ID_TIFF,
+ CODEC_ID_GIF,
+ CODEC_ID_FFH264,
+ CODEC_ID_DXA,
+ CODEC_ID_DNXHD,
+ CODEC_ID_THP,
+ CODEC_ID_SGI,
+ CODEC_ID_C93,
+ CODEC_ID_BETHSOFTVID,
+ CODEC_ID_PTX,
+ CODEC_ID_TXD,
+ CODEC_ID_VP6A,
+ CODEC_ID_AMV,
+ CODEC_ID_VB,
+ CODEC_ID_PCX,
+ CODEC_ID_SUNRAST,
+ CODEC_ID_INDEO4,
+ CODEC_ID_INDEO5,
+ CODEC_ID_MIMIC,
+ CODEC_ID_RL2,
+ CODEC_ID_8SVX_EXP,
+ CODEC_ID_8SVX_FIB,
+ CODEC_ID_ESCAPE124,
+ CODEC_ID_DIRAC,
+ CODEC_ID_BFI,
+ CODEC_ID_CMV,
+ CODEC_ID_MOTIONPIXELS,
+ CODEC_ID_TGV,
+ CODEC_ID_TGQ,
+ CODEC_ID_TQI,
+ CODEC_ID_AURA,
+ CODEC_ID_AURA2,
+ CODEC_ID_V210X,
+ CODEC_ID_TMV,
+ CODEC_ID_V210,
+ CODEC_ID_DPX,
+ CODEC_ID_MAD,
+ CODEC_ID_FRWU,
+ CODEC_ID_FLASHSV2,
+ CODEC_ID_CDGRAPHICS,
+ CODEC_ID_R210,
+ CODEC_ID_ANM,
+ CODEC_ID_BINKVIDEO,
+ CODEC_ID_IFF_ILBM,
+ CODEC_ID_IFF_BYTERUN1,
+ CODEC_ID_KGV1,
+ CODEC_ID_YOP,
+ CODEC_ID_VP8,
+ CODEC_ID_PICTOR,
+ CODEC_ID_ANSI,
+ CODEC_ID_A64_MULTI,
+ CODEC_ID_A64_MULTI5,
+ CODEC_ID_R10K,
+ CODEC_ID_MXPEG,
+ CODEC_ID_LAGARITH,
+
+ /* various PCM "codecs" */
+ CODEC_ID_PCM_S16LE= 0x10000,
+ CODEC_ID_PCM_S16BE,
+ CODEC_ID_PCM_U16LE,
+ CODEC_ID_PCM_U16BE,
+ CODEC_ID_PCM_S8,
+ CODEC_ID_PCM_U8,
+ CODEC_ID_PCM_MULAW,
+ CODEC_ID_PCM_ALAW,
+ CODEC_ID_PCM_S32LE,
+ CODEC_ID_PCM_S32BE,
+ CODEC_ID_PCM_U32LE,
+ CODEC_ID_PCM_U32BE,
+ CODEC_ID_PCM_S24LE,
+ CODEC_ID_PCM_S24BE,
+ CODEC_ID_PCM_U24LE,
+ CODEC_ID_PCM_U24BE,
+ CODEC_ID_PCM_S24DAUD,
+ CODEC_ID_PCM_ZORK,
+ CODEC_ID_PCM_S16LE_PLANAR,
+ CODEC_ID_PCM_DVD,
+ CODEC_ID_PCM_F32BE,
+ CODEC_ID_PCM_F32LE,
+ CODEC_ID_PCM_F64BE,
+ CODEC_ID_PCM_F64LE,
+ CODEC_ID_PCM_BLURAY,
+ CODEC_ID_PCM_LXF,
+
+ /* various ADPCM codecs */
+ CODEC_ID_ADPCM_IMA_QT= 0x11000,
+ CODEC_ID_ADPCM_IMA_WAV,
+ CODEC_ID_ADPCM_IMA_DK3,
+ CODEC_ID_ADPCM_IMA_DK4,
+ CODEC_ID_ADPCM_IMA_WS,
+ CODEC_ID_ADPCM_IMA_SMJPEG,
+ CODEC_ID_ADPCM_MS,
+ CODEC_ID_ADPCM_4XM,
+ CODEC_ID_ADPCM_XA,
+ CODEC_ID_ADPCM_ADX,
+ CODEC_ID_ADPCM_EA,
+ CODEC_ID_ADPCM_G726,
+ CODEC_ID_ADPCM_CT,
+ CODEC_ID_ADPCM_SWF,
+ CODEC_ID_ADPCM_YAMAHA,
+ CODEC_ID_ADPCM_SBPRO_4,
+ CODEC_ID_ADPCM_SBPRO_3,
+ CODEC_ID_ADPCM_SBPRO_2,
+ CODEC_ID_ADPCM_THP,
+ CODEC_ID_ADPCM_IMA_AMV,
+ CODEC_ID_ADPCM_EA_R1,
+ CODEC_ID_ADPCM_EA_R3,
+ CODEC_ID_ADPCM_EA_R2,
+ CODEC_ID_ADPCM_IMA_EA_SEAD,
+ CODEC_ID_ADPCM_IMA_EA_EACS,
+ CODEC_ID_ADPCM_EA_XAS,
+ CODEC_ID_ADPCM_EA_MAXIS_XA,
+ CODEC_ID_ADPCM_IMA_ISS,
+ CODEC_ID_ADPCM_G722,
+
+ /* AMR */
+ CODEC_ID_AMR_NB= 0x12000,
+ CODEC_ID_AMR_WB,
+
+ /* RealAudio codecs*/
+ CODEC_ID_RA_144= 0x13000,
+ CODEC_ID_RA_288,
+
+ /* various DPCM codecs */
+ CODEC_ID_ROQ_DPCM= 0x14000,
+ CODEC_ID_INTERPLAY_DPCM,
+ CODEC_ID_XAN_DPCM,
+ CODEC_ID_SOL_DPCM,
+
+ /* audio codecs */
+ CODEC_ID_MP2= 0x15000,
+ CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
+ CODEC_ID_AAC,
+ CODEC_ID_AC3,
+ CODEC_ID_DTS,
+ CODEC_ID_VORBIS,
+ CODEC_ID_DVAUDIO,
+ CODEC_ID_WMAV1,
+ CODEC_ID_WMAV2,
+ CODEC_ID_MACE3,
+ CODEC_ID_MACE6,
+ CODEC_ID_VMDAUDIO,
+ CODEC_ID_SONIC,
+ CODEC_ID_SONIC_LS,
+ CODEC_ID_FLAC,
+ CODEC_ID_MP3ADU,
+ CODEC_ID_MP3ON4,
+ CODEC_ID_SHORTEN,
+ CODEC_ID_ALAC,
+ CODEC_ID_WESTWOOD_SND1,
+ CODEC_ID_GSM, ///< as in Berlin toast format
+ CODEC_ID_QDM2,
+ CODEC_ID_COOK,
+ CODEC_ID_TRUESPEECH,
+ CODEC_ID_TTA,
+ CODEC_ID_SMACKAUDIO,
+ CODEC_ID_QCELP,
+ CODEC_ID_WAVPACK,
+ CODEC_ID_DSICINAUDIO,
+ CODEC_ID_IMC,
+ CODEC_ID_MUSEPACK7,
+ CODEC_ID_MLP,
+ CODEC_ID_GSM_MS, /* as found in WAV */
+ CODEC_ID_ATRAC3,
+ CODEC_ID_VOXWARE,
+ CODEC_ID_APE,
+ CODEC_ID_NELLYMOSER,
+ CODEC_ID_MUSEPACK8,
+ CODEC_ID_SPEEX,
+ CODEC_ID_WMAVOICE,
+ CODEC_ID_WMAPRO,
+ CODEC_ID_WMALOSSLESS,
+ CODEC_ID_ATRAC3P,
+ CODEC_ID_EAC3,
+ CODEC_ID_SIPR,
+ CODEC_ID_MP1,
+ CODEC_ID_TWINVQ,
+ CODEC_ID_TRUEHD,
+ CODEC_ID_MP4ALS,
+ CODEC_ID_ATRAC1,
+ CODEC_ID_BINKAUDIO_RDFT,
+ CODEC_ID_BINKAUDIO_DCT,
+ CODEC_ID_AAC_LATM,
+
+ /* subtitle codecs */
+ CODEC_ID_DVD_SUBTITLE= 0x17000,
+ CODEC_ID_DVB_SUBTITLE,
+ CODEC_ID_TEXT, ///< raw UTF-8 text
+ CODEC_ID_XSUB,
+ CODEC_ID_SSA,
+ CODEC_ID_MOV_TEXT,
+ CODEC_ID_HDMV_PGS_SUBTITLE,
+ CODEC_ID_DVB_TELETEXT,
+ CODEC_ID_SRT,
+
+ /* other specific kind of codecs (generally used for attachments) */
+ CODEC_ID_TTF= 0x18000,
+
+ CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
+
+ CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
+ * stream (only used by libavformat) */
+ CODEC_ID_FFMETADATA=0x21000, ///< Dummy codec for streams containing only metadata information.
+};
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+#define CodecType AVMediaType
+
+#define CODEC_TYPE_UNKNOWN AVMEDIA_TYPE_UNKNOWN
+#define CODEC_TYPE_VIDEO AVMEDIA_TYPE_VIDEO
+#define CODEC_TYPE_AUDIO AVMEDIA_TYPE_AUDIO
+#define CODEC_TYPE_DATA AVMEDIA_TYPE_DATA
+#define CODEC_TYPE_SUBTITLE AVMEDIA_TYPE_SUBTITLE
+#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
+#define CODEC_TYPE_NB AVMEDIA_TYPE_NB
+#endif
+
+#if FF_API_OLD_SAMPLE_FMT
+#define SampleFormat AVSampleFormat
+
+#define SAMPLE_FMT_NONE AV_SAMPLE_FMT_NONE
+#define SAMPLE_FMT_U8 AV_SAMPLE_FMT_U8
+#define SAMPLE_FMT_S16 AV_SAMPLE_FMT_S16
+#define SAMPLE_FMT_S32 AV_SAMPLE_FMT_S32
+#define SAMPLE_FMT_FLT AV_SAMPLE_FMT_FLT
+#define SAMPLE_FMT_DBL AV_SAMPLE_FMT_DBL
+#define SAMPLE_FMT_NB AV_SAMPLE_FMT_NB
+#endif
+
+#if FF_API_OLD_AUDIOCONVERT
+#include "libavcore/audioconvert.h"
+
+/* Audio channel masks */
+#define CH_FRONT_LEFT AV_CH_FRONT_LEFT
+#define CH_FRONT_RIGHT AV_CH_FRONT_RIGHT
+#define CH_FRONT_CENTER AV_CH_FRONT_CENTER
+#define CH_LOW_FREQUENCY AV_CH_LOW_FREQUENCY
+#define CH_BACK_LEFT AV_CH_BACK_LEFT
+#define CH_BACK_RIGHT AV_CH_BACK_RIGHT
+#define CH_FRONT_LEFT_OF_CENTER AV_CH_FRONT_LEFT_OF_CENTER
+#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER
+#define CH_BACK_CENTER AV_CH_BACK_CENTER
+#define CH_SIDE_LEFT AV_CH_SIDE_LEFT
+#define CH_SIDE_RIGHT AV_CH_SIDE_RIGHT
+#define CH_TOP_CENTER AV_CH_TOP_CENTER
+#define CH_TOP_FRONT_LEFT AV_CH_TOP_FRONT_LEFT
+#define CH_TOP_FRONT_CENTER AV_CH_TOP_FRONT_CENTER
+#define CH_TOP_FRONT_RIGHT AV_CH_TOP_FRONT_RIGHT
+#define CH_TOP_BACK_LEFT AV_CH_TOP_BACK_LEFT
+#define CH_TOP_BACK_CENTER AV_CH_TOP_BACK_CENTER
+#define CH_TOP_BACK_RIGHT AV_CH_TOP_BACK_RIGHT
+#define CH_STEREO_LEFT AV_CH_STEREO_LEFT
+#define CH_STEREO_RIGHT AV_CH_STEREO_RIGHT
+
+/** Channel mask value used for AVCodecContext.request_channel_layout
+ to indicate that the user requests the channel order of the decoder output
+ to be the native codec channel order. */
+#define CH_LAYOUT_NATIVE AV_CH_LAYOUT_NATIVE
+
+/* Audio channel convenience macros */
+#define CH_LAYOUT_MONO AV_CH_LAYOUT_MONO
+#define CH_LAYOUT_STEREO AV_CH_LAYOUT_STEREO
+#define CH_LAYOUT_2_1 AV_CH_LAYOUT_2_1
+#define CH_LAYOUT_SURROUND AV_CH_LAYOUT_SURROUND
+#define CH_LAYOUT_4POINT0 AV_CH_LAYOUT_4POINT0
+#define CH_LAYOUT_2_2 AV_CH_LAYOUT_2_2
+#define CH_LAYOUT_QUAD AV_CH_LAYOUT_QUAD
+#define CH_LAYOUT_5POINT0 AV_CH_LAYOUT_5POINT0
+#define CH_LAYOUT_5POINT1 AV_CH_LAYOUT_5POINT1
+#define CH_LAYOUT_5POINT0_BACK AV_CH_LAYOUT_5POINT0_BACK
+#define CH_LAYOUT_5POINT1_BACK AV_CH_LAYOUT_5POINT1_BACK
+#define CH_LAYOUT_7POINT0 AV_CH_LAYOUT_7POINT0
+#define CH_LAYOUT_7POINT1 AV_CH_LAYOUT_7POINT1
+#define CH_LAYOUT_7POINT1_WIDE AV_CH_LAYOUT_7POINT1_WIDE
+#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX
+#endif
+
+/* in bytes */
+#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
+
+/**
+ * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
+ * This is mainly needed because some optimized bitstream readers read
+ * 32 or 64 bit at once and could read over the end.<br>
+ * Note: If the first 23 bits of the additional bytes are not 0, then damaged
+ * MPEG bitstreams could cause overread and segfault.
+ */
+#define FF_INPUT_BUFFER_PADDING_SIZE 8
+
+/**
+ * minimum encoding buffer size
+ * Used to avoid some checks during header writing.
+ */
+#define FF_MIN_BUFFER_SIZE 16384
+
+
+/**
+ * motion estimation type.
+ */
+enum Motion_Est_ID {
+ ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
+ ME_FULL,
+ ME_LOG,
+ ME_PHODS,
+ ME_EPZS, ///< enhanced predictive zonal search
+ ME_X1, ///< reserved for experiments
+ ME_HEX, ///< hexagon based search
+ ME_UMH, ///< uneven multi-hexagon search
+ ME_ITER, ///< iterative search
+ ME_TESA, ///< transformed exhaustive search algorithm
+};
+
+enum AVDiscard{
+ /* We leave some space between them for extensions (drop some
+ * keyframes for intra-only or drop just some bidir frames). */
+ AVDISCARD_NONE =-16, ///< discard nothing
+ AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
+ AVDISCARD_NONREF = 8, ///< discard all non reference
+ AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
+ AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
+ AVDISCARD_ALL = 48, ///< discard all
+};
+
+enum AVColorPrimaries{
+ AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
+ AVCOL_PRI_UNSPECIFIED=2,
+ AVCOL_PRI_BT470M =4,
+ AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
+ AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
+ AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
+ AVCOL_PRI_FILM =8,
+ AVCOL_PRI_NB , ///< Not part of ABI
+};
+
+enum AVColorTransferCharacteristic{
+ AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
+ AVCOL_TRC_UNSPECIFIED=2,
+ AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
+ AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
+ AVCOL_TRC_NB , ///< Not part of ABI
+};
+
+enum AVColorSpace{
+ AVCOL_SPC_RGB =0,
+ AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
+ AVCOL_SPC_UNSPECIFIED=2,
+ AVCOL_SPC_FCC =4,
+ AVCOL_SPC_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
+ AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
+ AVCOL_SPC_SMPTE240M =7,
+ AVCOL_SPC_NB , ///< Not part of ABI
+};
+
+enum AVColorRange{
+ AVCOL_RANGE_UNSPECIFIED=0,
+ AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
+ AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
+ AVCOL_RANGE_NB , ///< Not part of ABI
+};
+
+/**
+ * X X 3 4 X X are luma samples,
+ * 1 2 1-6 are possible chroma positions
+ * X X 5 6 X 0 is undefined/unknown position
+ */
+enum AVChromaLocation{
+ AVCHROMA_LOC_UNSPECIFIED=0,
+ AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
+ AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
+ AVCHROMA_LOC_TOPLEFT =3, ///< DV
+ AVCHROMA_LOC_TOP =4,
+ AVCHROMA_LOC_BOTTOMLEFT =5,
+ AVCHROMA_LOC_BOTTOM =6,
+ AVCHROMA_LOC_NB , ///< Not part of ABI
+};
+
+/**
+ * LPC analysis type
+ */
+enum AVLPCType {
+ AV_LPC_TYPE_DEFAULT = -1, ///< use the codec default LPC type
+ AV_LPC_TYPE_NONE = 0, ///< do not use LPC prediction or use all zero coefficients
+ AV_LPC_TYPE_FIXED = 1, ///< fixed LPC coefficients
+ AV_LPC_TYPE_LEVINSON = 2, ///< Levinson-Durbin recursion
+ AV_LPC_TYPE_CHOLESKY = 3, ///< Cholesky factorization
+ AV_LPC_TYPE_NB , ///< Not part of ABI
+};
+
+typedef struct RcOverride{
+ int start_frame;
+ int end_frame;
+ int qscale; // If this is 0 then quality_factor will be used instead.
+ float quality_factor;
+} RcOverride;
+
+#define FF_MAX_B_FRAMES 16
+
+/* encoding support
+ These flags can be passed in AVCodecContext.flags before initialization.
+ Note: Not everything is supported yet.
+*/
+
+#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
+#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
+#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
+#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
+#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
+#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
+/**
+ * The parent program guarantees that the input for B-frames containing
+ * streams is not written to for at least s->max_b_frames+1 frames, if
+ * this is not set the input will be copied.
+ */
+#define CODEC_FLAG_INPUT_PRESERVED 0x0100
+#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
+#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
+#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
+#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
+#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
+#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
+#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
+ location instead of only at frame boundaries. */
+#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
+#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
+#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
+#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
+#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
+#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
+/* Fx : Flag for h263+ extra options */
+#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
+#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
+#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
+#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
+#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
+#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
+#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
+#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
+#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
+#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
+#define CODEC_FLAG_CLOSED_GOP 0x80000000
+#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
+#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
+#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
+#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
+#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
+#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
+#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
+#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
+#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
+#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
+#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
+#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
+#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
+#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
+#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
+#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
+#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
+#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
+#define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
+#define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations.
+#define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
+#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
+
+/* Unsupported options :
+ * Syntax Arithmetic coding (SAC)
+ * Reference Picture Selection
+ * Independent Segment Decoding */
+/* /Fx */
+/* codec capabilities */
+
+#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
+/**
+ * Codec uses get_buffer() for allocating buffers and supports custom allocators.
+ * If not set, it might not use get_buffer() at all or use operations that
+ * assume the buffer was allocated by avcodec_default_get_buffer.
+ */
+#define CODEC_CAP_DR1 0x0002
+/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
+#define CODEC_CAP_PARSE_ONLY 0x0004
+#define CODEC_CAP_TRUNCATED 0x0008
+/* Codec can export data for HW decoding (XvMC). */
+#define CODEC_CAP_HWACCEL 0x0010
+/**
+ * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
+ * If this is not set, the codec is guaranteed to never be fed with NULL data.
+ */
+#define CODEC_CAP_DELAY 0x0020
+/**
+ * Codec can be fed a final frame with a smaller size.
+ * This can be used to prevent truncation of the last audio samples.
+ */
+#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
+/**
+ * Codec can export data for HW decoding (VDPAU).
+ */
+#define CODEC_CAP_HWACCEL_VDPAU 0x0080
+/**
+ * Codec can output multiple frames per AVPacket
+ * Normally demuxers return one frame at a time, demuxers which do not do
+ * are connected to a parser to split what they return into proper frames.
+ * This flag is reserved to the very rare category of codecs which have a
+ * bitstream that cannot be split into frames without timeconsuming
+ * operations like full decoding. Demuxers carring such bitstreams thus
+ * may return multiple frames in a packet. This has many disadvantages like
+ * prohibiting stream copy in many cases thus it should only be considered
+ * as a last resort.
+ */
+#define CODEC_CAP_SUBFRAMES 0x0100
+/**
+ * Codec is experimental and is thus avoided in favor of non experimental
+ * encoders
+ */
+#define CODEC_CAP_EXPERIMENTAL 0x0200
+/**
+ * Codec should fill in channel configuration and samplerate instead of container
+ */
+#define CODEC_CAP_CHANNEL_CONF 0x0400
+/**
+ * Codec is able to deal with negative linesizes
+ */
+#define CODEC_CAP_NEG_LINESIZES 0x0800
+
+//The following defines may change, don't expect compatibility if you use them.
+#define MB_TYPE_INTRA4x4 0x0001
+#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
+#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
+#define MB_TYPE_16x16 0x0008
+#define MB_TYPE_16x8 0x0010
+#define MB_TYPE_8x16 0x0020
+#define MB_TYPE_8x8 0x0040
+#define MB_TYPE_INTERLACED 0x0080
+#define MB_TYPE_DIRECT2 0x0100 //FIXME
+#define MB_TYPE_ACPRED 0x0200
+#define MB_TYPE_GMC 0x0400
+#define MB_TYPE_SKIP 0x0800
+#define MB_TYPE_P0L0 0x1000
+#define MB_TYPE_P1L0 0x2000
+#define MB_TYPE_P0L1 0x4000
+#define MB_TYPE_P1L1 0x8000
+#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
+#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
+#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
+#define MB_TYPE_QUANT 0x00010000
+#define MB_TYPE_CBP 0x00020000
+//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
+
+/**
+ * Pan Scan area.
+ * This specifies the area which should be displayed.
+ * Note there may be multiple such areas for one frame.
+ */
+typedef struct AVPanScan{
+ /**
+ * id
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ int id;
+
+ /**
+ * width and height in 1/16 pel
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ int width;
+ int height;
+
+ /**
+ * position of the top left corner in 1/16 pel for up to 3 fields/frames
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ int16_t position[3][2];
+}AVPanScan;
+
+#define FF_COMMON_FRAME \
+ /**\
+ * pointer to the picture planes.\
+ * This might be different from the first allocated byte\
+ * - encoding: \
+ * - decoding: \
+ */\
+ uint8_t *data[4];\
+ int linesize[4];\
+ /**\
+ * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
+ * This isn't used by libavcodec unless the default get/release_buffer() is used.\
+ * - encoding: \
+ * - decoding: \
+ */\
+ uint8_t *base[4];\
+ /**\
+ * 1 -> keyframe, 0-> not\
+ * - encoding: Set by libavcodec.\
+ * - decoding: Set by libavcodec.\
+ */\
+ int key_frame;\
+\
+ /**\
+ * Picture type of the frame, see ?_TYPE below.\
+ * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
+ * - decoding: Set by libavcodec.\
+ */\
+ int pict_type;\
+\
+ /**\
+ * presentation timestamp in time_base units (time when frame should be shown to user)\
+ * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
+ * - encoding: MUST be set by user.\
+ * - decoding: Set by libavcodec.\
+ */\
+ int64_t pts;\
+\
+ /**\
+ * picture number in bitstream order\
+ * - encoding: set by\
+ * - decoding: Set by libavcodec.\
+ */\
+ int coded_picture_number;\
+ /**\
+ * picture number in display order\
+ * - encoding: set by\
+ * - decoding: Set by libavcodec.\
+ */\
+ int display_picture_number;\
+\
+ /**\
+ * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
+ * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
+ * - decoding: Set by libavcodec.\
+ */\
+ int quality; \
+\
+ /**\
+ * buffer age (1->was last buffer and dint change, 2->..., ...).\
+ * Set to INT_MAX if the buffer has not been used yet.\
+ * - encoding: unused\
+ * - decoding: MUST be set by get_buffer().\
+ */\
+ int age;\
+\
+ /**\
+ * is this picture used as reference\
+ * The values for this are the same as the MpegEncContext.picture_structure\
+ * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
+ * Set to 4 for delayed, non-reference frames.\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec. (before get_buffer() call)).\
+ */\
+ int reference;\
+\
+ /**\
+ * QP table\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec.\
+ */\
+ int8_t *qscale_table;\
+ /**\
+ * QP store stride\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec.\
+ */\
+ int qstride;\
+\
+ /**\
+ * mbskip_table[mb]>=1 if MB didn't change\
+ * stride= mb_width = (width+15)>>4\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec.\
+ */\
+ uint8_t *mbskip_table;\
+\
+ /**\
+ * motion vector table\
+ * @code\
+ * example:\
+ * int mv_sample_log2= 4 - motion_subsample_log2;\
+ * int mb_width= (width+15)>>4;\
+ * int mv_stride= (mb_width << mv_sample_log2) + 1;\
+ * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
+ * @endcode\
+ * - encoding: Set by user.\
+ * - decoding: Set by libavcodec.\
+ */\
+ int16_t (*motion_val[2])[2];\
+\
+ /**\
+ * macroblock type table\
+ * mb_type_base + mb_width + 2\
+ * - encoding: Set by user.\
+ * - decoding: Set by libavcodec.\
+ */\
+ uint32_t *mb_type;\
+\
+ /**\
+ * log2 of the size of the block which a single vector in motion_val represents: \
+ * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec.\
+ */\
+ uint8_t motion_subsample_log2;\
+\
+ /**\
+ * for some private data of the user\
+ * - encoding: unused\
+ * - decoding: Set by user.\
+ */\
+ void *opaque;\
+\
+ /**\
+ * error\
+ * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
+ * - decoding: unused\
+ */\
+ uint64_t error[4];\
+\
+ /**\
+ * type of the buffer (to keep track of who has to deallocate data[*])\
+ * - encoding: Set by the one who allocates it.\
+ * - decoding: Set by the one who allocates it.\
+ * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
+ */\
+ int type;\
+ \
+ /**\
+ * When decoding, this signals how much the picture must be delayed.\
+ * extra_delay = repeat_pict / (2*fps)\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec.\
+ */\
+ int repeat_pict;\
+ \
+ /**\
+ * \
+ */\
+ int qscale_type;\
+ \
+ /**\
+ * The content of the picture is interlaced.\
+ * - encoding: Set by user.\
+ * - decoding: Set by libavcodec. (default 0)\
+ */\
+ int interlaced_frame;\
+ \
+ /**\
+ * If the content is interlaced, is top field displayed first.\
+ * - encoding: Set by user.\
+ * - decoding: Set by libavcodec.\
+ */\
+ int top_field_first;\
+ \
+ /**\
+ * Pan scan.\
+ * - encoding: Set by user.\
+ * - decoding: Set by libavcodec.\
+ */\
+ AVPanScan *pan_scan;\
+ \
+ /**\
+ * Tell user application that palette has changed from previous frame.\
+ * - encoding: ??? (no palette-enabled encoder yet)\
+ * - decoding: Set by libavcodec. (default 0).\
+ */\
+ int palette_has_changed;\
+ \
+ /**\
+ * codec suggestion on buffer type if != 0\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec. (before get_buffer() call)).\
+ */\
+ int buffer_hints;\
+\
+ /**\
+ * DCT coefficients\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec.\
+ */\
+ short *dct_coeff;\
+\
+ /**\
+ * motion reference frame index\
+ * the order in which these are stored can depend on the codec.\
+ * - encoding: Set by user.\
+ * - decoding: Set by libavcodec.\
+ */\
+ int8_t *ref_index[2];\
+\
+ /**\
+ * reordered opaque 64bit (generally an integer or a double precision float\
+ * PTS but can be anything). \
+ * The user sets AVCodecContext.reordered_opaque to represent the input at\
+ * that time,\
+ * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
+ * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
+ * @deprecated in favor of pkt_pts\
+ * - encoding: unused\
+ * - decoding: Read by user.\
+ */\
+ int64_t reordered_opaque;\
+\
+ /**\
+ * hardware accelerator private data (FFmpeg allocated)\
+ * - encoding: unused\
+ * - decoding: Set by libavcodec\
+ */\
+ void *hwaccel_picture_private;\
+\
+ /**\
+ * reordered pts from the last AVPacket that has been input into the decoder\
+ * - encoding: unused\
+ * - decoding: Read by user.\
+ */\
+ int64_t pkt_pts;\
+\
+ /**\
+ * dts from the last AVPacket that has been input into the decoder\
+ * - encoding: unused\
+ * - decoding: Read by user.\
+ */\
+ int64_t pkt_dts;\
+
+
+#define FF_QSCALE_TYPE_MPEG1 0
+#define FF_QSCALE_TYPE_MPEG2 1
+#define FF_QSCALE_TYPE_H264 2
+#define FF_QSCALE_TYPE_VP56 3
+
+#define FF_BUFFER_TYPE_INTERNAL 1
+#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
+#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
+#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
+
+
+#define FF_I_TYPE 1 ///< Intra
+#define FF_P_TYPE 2 ///< Predicted
+#define FF_B_TYPE 3 ///< Bi-dir predicted
+#define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
+#define FF_SI_TYPE 5 ///< Switching Intra
+#define FF_SP_TYPE 6 ///< Switching Predicted
+#define FF_BI_TYPE 7
+
+#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
+#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
+#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
+#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
+
+typedef struct AVPacket {
+ /**
+ * Presentation timestamp in AVStream->time_base units; the time at which
+ * the decompressed packet will be presented to the user.
+ * Can be AV_NOPTS_VALUE if it is not stored in the file.
+ * pts MUST be larger or equal to dts as presentation cannot happen before
+ * decompression, unless one wants to view hex dumps. Some formats misuse
+ * the terms dts and pts/cts to mean something different. Such timestamps
+ * must be converted to true pts/dts before they are stored in AVPacket.
+ */
+ int64_t pts;
+ /**
+ * Decompression timestamp in AVStream->time_base units; the time at which
+ * the packet is decompressed.
+ * Can be AV_NOPTS_VALUE if it is not stored in the file.
+ */
+ int64_t dts;
+ uint8_t *data;
+ int size;
+ int stream_index;
+ int flags;
+ /**
+ * Duration of this packet in AVStream->time_base units, 0 if unknown.
+ * Equals next_pts - this_pts in presentation order.
+ */
+ int duration;
+ void (*destruct)(struct AVPacket *);
+ void *priv;
+ int64_t pos; ///< byte position in stream, -1 if unknown
+
+ /**
+ * Time difference in AVStream->time_base units from the pts of this
+ * packet to the point at which the output from the decoder has converged
+ * independent from the availability of previous frames. That is, the
+ * frames are virtually identical no matter if decoding started from
+ * the very first frame or from this keyframe.
+ * Is AV_NOPTS_VALUE if unknown.
+ * This field is not the display duration of the current packet.
+ * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
+ * set.
+ *
+ * The purpose of this field is to allow seeking in streams that have no
+ * keyframes in the conventional sense. It corresponds to the
+ * recovery point SEI in H.264 and match_time_delta in NUT. It is also
+ * essential for some types of subtitle streams to ensure that all
+ * subtitles are correctly displayed after seeking.
+ */
+ int64_t convergence_duration;
+} AVPacket;
+#define AV_PKT_FLAG_KEY 0x0001
+#if LIBAVCODEC_VERSION_MAJOR < 53
+#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
+#endif
+
+/**
+ * Audio Video Frame.
+ * New fields can be added to the end of FF_COMMON_FRAME with minor version
+ * bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump. No fields should be added into AVFrame before or after
+ * FF_COMMON_FRAME!
+ * sizeof(AVFrame) must not be used outside libav*.
+ */
+typedef struct AVFrame {
+ FF_COMMON_FRAME
+} AVFrame;
+
+/**
+ * main external API structure.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(AVCodecContext) must not be used outside libav*.
+ */
+typedef struct AVCodecContext {
+ /**
+ * information on struct for av_log
+ * - set by avcodec_alloc_context
+ */
+ const AVClass *av_class;
+ /**
+ * the average bitrate
+ * - encoding: Set by user; unused for constant quantizer encoding.
+ * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
+ */
+ int bit_rate;
+
+ /**
+ * number of bits the bitstream is allowed to diverge from the reference.
+ * the reference can be CBR (for CBR pass1) or VBR (for pass2)
+ * - encoding: Set by user; unused for constant quantizer encoding.
+ * - decoding: unused
+ */
+ int bit_rate_tolerance;
+
+ /**
+ * CODEC_FLAG_*.
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ int flags;
+
+ /**
+ * Some codecs need additional format info. It is stored here.
+ * If any muxer uses this then ALL demuxers/parsers AND encoders for the
+ * specific codec MUST set it correctly otherwise stream copy breaks.
+ * In general use of this field by muxers is not recommanded.
+ * - encoding: Set by libavcodec.
+ * - decoding: Set by libavcodec. (FIXME: Is this OK?)
+ */
+ int sub_id;
+
+ /**
+ * Motion estimation algorithm used for video coding.
+ * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
+ * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
+ * - encoding: MUST be set by user.
+ * - decoding: unused
+ */
+ int me_method;
+
+ /**
+ * some codecs need / can use extradata like Huffman tables.
+ * mjpeg: Huffman tables
+ * rv10: additional flags
+ * mpeg4: global headers (they can be in the bitstream or here)
+ * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
+ * than extradata_size to avoid prolems if it is read with the bitstream reader.
+ * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
+ * - encoding: Set/allocated/freed by libavcodec.
+ * - decoding: Set/allocated/freed by user.
+ */
+ uint8_t *extradata;
+ int extradata_size;
+
+ /**
+ * This is the fundamental unit of time (in seconds) in terms
+ * of which frame timestamps are represented. For fixed-fps content,
+ * timebase should be 1/framerate and timestamp increments should be
+ * identically 1.
+ * - encoding: MUST be set by user.
+ * - decoding: Set by libavcodec.
+ */
+ AVRational time_base;
+
+ /* video only */
+ /**
+ * picture width / height.
+ * - encoding: MUST be set by user.
+ * - decoding: Set by libavcodec.
+ * Note: For compatibility it is possible to set this instead of
+ * coded_width/height before decoding.
+ */
+ int width, height;
+
+#define FF_ASPECT_EXTENDED 15
+
+ /**
+ * the number of pictures in a group of pictures, or 0 for intra_only
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int gop_size;
+
+ /**
+ * Pixel format, see PIX_FMT_xxx.
+ * May be set by the demuxer if known from headers.
+ * May be overriden by the decoder if it knows better.
+ * - encoding: Set by user.
+ * - decoding: Set by user if known, overridden by libavcodec if known
+ */
+ enum PixelFormat pix_fmt;
+
+ /**
+ * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
+ * has to read frames at native frame rate.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int rate_emu;
+
+ /**
+ * If non NULL, 'draw_horiz_band' is called by the libavcodec
+ * decoder to draw a horizontal band. It improves cache usage. Not
+ * all codecs can do that. You must check the codec capabilities
+ * beforehand.
+ * The function is also used by hardware acceleration APIs.
+ * It is called at least once during frame decoding to pass
+ * the data needed for hardware render.
+ * In that mode instead of pixel data, AVFrame points to
+ * a structure specific to the acceleration API. The application
+ * reads the structure and can change some fields to indicate progress
+ * or mark state.
+ * - encoding: unused
+ * - decoding: Set by user.
+ * @param height the height of the slice
+ * @param y the y position of the slice
+ * @param type 1->top field, 2->bottom field, 3->frame
+ * @param offset offset into the AVFrame.data from which the slice should be read
+ */
+ void (*draw_horiz_band)(struct AVCodecContext *s,
+ const AVFrame *src, int offset[4],
+ int y, int type, int height);
+
+ /* audio only */
+ int sample_rate; ///< samples per second
+ int channels; ///< number of audio channels
+
+ /**
+ * audio sample format
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ enum AVSampleFormat sample_fmt; ///< sample format
+
+ /* The following data should not be initialized. */
+ /**
+ * Samples per packet, initialized when calling 'init'.
+ */
+ int frame_size;
+ int frame_number; ///< audio or video frame number
+#if LIBAVCODEC_VERSION_MAJOR < 53
+ int real_pict_num; ///< Returns the real picture number of previous encoded frame.
+#endif
+
+ /**
+ * Number of frames the decoded output will be delayed relative to
+ * the encoded input.
+ * - encoding: Set by libavcodec.
+ * - decoding: unused
+ */
+ int delay;
+
+ /* - encoding parameters */
+ float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
+ float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
+
+ /**
+ * minimum quantizer
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int qmin;
+
+ /**
+ * maximum quantizer
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int qmax;
+
+ /**
+ * maximum quantizer difference between frames
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int max_qdiff;
+
+ /**
+ * maximum number of B-frames between non-B-frames
+ * Note: The output will be delayed by max_b_frames+1 relative to the input.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int max_b_frames;
+
+ /**
+ * qscale factor between IP and B-frames
+ * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
+ * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float b_quant_factor;
+
+ /** obsolete FIXME remove */
+ int rc_strategy;
+#define FF_RC_STRATEGY_XVID 1
+
+ int b_frame_strategy;
+
+ /**
+ * hurry up amount
+ * - encoding: unused
+ * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
+ * @deprecated Deprecated in favor of skip_idct and skip_frame.
+ */
+ int hurry_up;
+
+ struct AVCodec *codec;
+
+ void *priv_data;
+
+ int rtp_payload_size; /* The size of the RTP payload: the coder will */
+ /* do its best to deliver a chunk with size */
+ /* below rtp_payload_size, the chunk will start */
+ /* with a start code on some codecs like H.263. */
+ /* This doesn't take account of any particular */
+ /* headers inside the transmitted RTP payload. */
+
+
+ /* The RTP callback: This function is called */
+ /* every time the encoder has a packet to send. */
+ /* It depends on the encoder if the data starts */
+ /* with a Start Code (it should). H.263 does. */
+ /* mb_nb contains the number of macroblocks */
+ /* encoded in the RTP payload. */
+ void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
+
+ /* statistics, used for 2-pass encoding */
+ int mv_bits;
+ int header_bits;
+ int i_tex_bits;
+ int p_tex_bits;
+ int i_count;
+ int p_count;
+ int skip_count;
+ int misc_bits;
+
+ /**
+ * number of bits used for the previously encoded frame
+ * - encoding: Set by libavcodec.
+ * - decoding: unused
+ */
+ int frame_bits;
+
+ /**
+ * Private data of the user, can be used to carry app specific stuff.
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ void *opaque;
+
+ char codec_name[32];
+ enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
+ enum CodecID codec_id; /* see CODEC_ID_xxx */
+
+ /**
+ * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
+ * This is used to work around some encoder bugs.
+ * A demuxer should set this to what is stored in the field used to identify the codec.
+ * If there are multiple such fields in a container then the demuxer should choose the one
+ * which maximizes the information about the used codec.
+ * If the codec tag field in a container is larger then 32 bits then the demuxer should
+ * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
+ * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
+ * first.
+ * - encoding: Set by user, if not then the default based on codec_id will be used.
+ * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
+ */
+ unsigned int codec_tag;
+
+ /**
+ * Work around bugs in encoders which sometimes cannot be detected automatically.
+ * - encoding: Set by user
+ * - decoding: Set by user
+ */
+ int workaround_bugs;
+#define FF_BUG_AUTODETECT 1 ///< autodetection
+#define FF_BUG_OLD_MSMPEG4 2
+#define FF_BUG_XVID_ILACE 4
+#define FF_BUG_UMP4 8
+#define FF_BUG_NO_PADDING 16
+#define FF_BUG_AMV 32
+#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
+#define FF_BUG_QPEL_CHROMA 64
+#define FF_BUG_STD_QPEL 128
+#define FF_BUG_QPEL_CHROMA2 256
+#define FF_BUG_DIRECT_BLOCKSIZE 512
+#define FF_BUG_EDGE 1024
+#define FF_BUG_HPEL_CHROMA 2048
+#define FF_BUG_DC_CLIP 4096
+#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
+#define FF_BUG_TRUNCATED 16384
+//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
+
+ /**
+ * luma single coefficient elimination threshold
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int luma_elim_threshold;
+
+ /**
+ * chroma single coeff elimination threshold
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int chroma_elim_threshold;
+
+ /**
+ * strictly follow the standard (MPEG4, ...).
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ * Setting this to STRICT or higher means the encoder and decoder will
+ * generally do stupid things, whereas setting it to unofficial or lower
+ * will mean the encoder might produce output that is not supported by all
+ * spec-compliant decoders. Decoders don't differentiate between normal,
+ * unofficial and experimental (that is, they always try to decode things
+ * when they can) unless they are explicitly asked to behave stupidly
+ * (=strictly conform to the specs)
+ */
+ int strict_std_compliance;
+#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
+#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
+#define FF_COMPLIANCE_NORMAL 0
+#if FF_API_INOFFICIAL
+#define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
+#endif
+#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
+#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
+
+ /**
+ * qscale offset between IP and B-frames
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float b_quant_offset;
+
+ /**
+ * Error recognization; higher values will detect more errors but may
+ * misdetect some more or less valid parts as errors.
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int error_recognition;
+#define FF_ER_CAREFUL 1
+#define FF_ER_COMPLIANT 2
+#define FF_ER_AGGRESSIVE 3
+#define FF_ER_VERY_AGGRESSIVE 4
+
+ /**
+ * Called at the beginning of each frame to get a buffer for it.
+ * If pic.reference is set then the frame will be read later by libavcodec.
+ * avcodec_align_dimensions2() should be used to find the required width and
+ * height, as they normally need to be rounded up to the next multiple of 16.
+ * if CODEC_CAP_DR1 is not set then get_buffer() must call
+ * avcodec_default_get_buffer() instead of providing buffers allocated by
+ * some other means.
+ * - encoding: unused
+ * - decoding: Set by libavcodec, user can override.
+ */
+ int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+ /**
+ * Called to release buffers which were allocated with get_buffer.
+ * A released buffer can be reused in get_buffer().
+ * pic.data[*] must be set to NULL.
+ * - encoding: unused
+ * - decoding: Set by libavcodec, user can override.
+ */
+ void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+ /**
+ * Size of the frame reordering buffer in the decoder.
+ * For MPEG-2 it is 1 IPB or 0 low delay IP.
+ * - encoding: Set by libavcodec.
+ * - decoding: Set by libavcodec.
+ */
+ int has_b_frames;
+
+ /**
+ * number of bytes per packet if constant and known or 0
+ * Used by some WAV based audio codecs.
+ */
+ int block_align;
+
+ int parse_only; /* - decoding only: If true, only parsing is done
+ (function avcodec_parse_frame()). The frame
+ data is returned. Only MPEG codecs support this now. */
+
+ /**
+ * 0-> h263 quant 1-> mpeg quant
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int mpeg_quant;
+
+ /**
+ * pass1 encoding statistics output buffer
+ * - encoding: Set by libavcodec.
+ * - decoding: unused
+ */
+ char *stats_out;
+
+ /**
+ * pass2 encoding statistics input buffer
+ * Concatenated stuff from stats_out of pass1 should be placed here.
+ * - encoding: Allocated/set/freed by user.
+ * - decoding: unused
+ */
+ char *stats_in;
+
+ /**
+ * ratecontrol qmin qmax limiting method
+ * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float rc_qsquish;
+
+ float rc_qmod_amp;
+ int rc_qmod_freq;
+
+ /**
+ * ratecontrol override, see RcOverride
+ * - encoding: Allocated/set/freed by user.
+ * - decoding: unused
+ */
+ RcOverride *rc_override;
+ int rc_override_count;
+
+ /**
+ * rate control equation
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ const char *rc_eq;
+
+ /**
+ * maximum bitrate
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int rc_max_rate;
+
+ /**
+ * minimum bitrate
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int rc_min_rate;
+
+ /**
+ * decoder bitstream buffer size
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int rc_buffer_size;
+ float rc_buffer_aggressivity;
+
+ /**
+ * qscale factor between P and I-frames
+ * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
+ * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float i_quant_factor;
+
+ /**
+ * qscale offset between P and I-frames
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float i_quant_offset;
+
+ /**
+ * initial complexity for pass1 ratecontrol
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float rc_initial_cplx;
+
+ /**
+ * DCT algorithm, see FF_DCT_* below
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int dct_algo;
+#define FF_DCT_AUTO 0
+#define FF_DCT_FASTINT 1
+#define FF_DCT_INT 2
+#define FF_DCT_MMX 3
+#define FF_DCT_MLIB 4
+#define FF_DCT_ALTIVEC 5
+#define FF_DCT_FAAN 6
+
+ /**
+ * luminance masking (0-> disabled)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float lumi_masking;
+
+ /**
+ * temporary complexity masking (0-> disabled)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float temporal_cplx_masking;
+
+ /**
+ * spatial complexity masking (0-> disabled)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float spatial_cplx_masking;
+
+ /**
+ * p block masking (0-> disabled)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float p_masking;
+
+ /**
+ * darkness masking (0-> disabled)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float dark_masking;
+
+ /**
+ * IDCT algorithm, see FF_IDCT_* below.
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ int idct_algo;
+#define FF_IDCT_AUTO 0
+#define FF_IDCT_INT 1
+#define FF_IDCT_SIMPLE 2
+#define FF_IDCT_SIMPLEMMX 3
+#define FF_IDCT_LIBMPEG2MMX 4
+#define FF_IDCT_PS2 5
+#define FF_IDCT_MLIB 6
+#define FF_IDCT_ARM 7
+#define FF_IDCT_ALTIVEC 8
+#define FF_IDCT_SH4 9
+#define FF_IDCT_SIMPLEARM 10
+#define FF_IDCT_H264 11
+#define FF_IDCT_VP3 12
+#define FF_IDCT_IPP 13
+#define FF_IDCT_XVIDMMX 14
+#define FF_IDCT_CAVS 15
+#define FF_IDCT_SIMPLEARMV5TE 16
+#define FF_IDCT_SIMPLEARMV6 17
+#define FF_IDCT_SIMPLEVIS 18
+#define FF_IDCT_WMV2 19
+#define FF_IDCT_FAAN 20
+#define FF_IDCT_EA 21
+#define FF_IDCT_SIMPLENEON 22
+#define FF_IDCT_SIMPLEALPHA 23
+#define FF_IDCT_BINK 24
+
+ /**
+ * slice count
+ * - encoding: Set by libavcodec.
+ * - decoding: Set by user (or 0).
+ */
+ int slice_count;
+ /**
+ * slice offsets in the frame in bytes
+ * - encoding: Set/allocated by libavcodec.
+ * - decoding: Set/allocated by user (or NULL).
+ */
+ int *slice_offset;
+
+ /**
+ * error concealment flags
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int error_concealment;
+#define FF_EC_GUESS_MVS 1
+#define FF_EC_DEBLOCK 2
+
+ /**
+ * dsp_mask could be add used to disable unwanted CPU features
+ * CPU features (i.e. MMX, SSE. ...)
+ *
+ * With the FORCE flag you may instead enable given CPU features.
+ * (Dangerous: Usable in case of misdetection, improper usage however will
+ * result into program crash.)
+ */
+ unsigned dsp_mask;
+
+#if FF_API_MM_FLAGS
+#define FF_MM_FORCE AV_CPU_FLAG_FORCE
+#define FF_MM_MMX AV_CPU_FLAG_MMX
+#define FF_MM_3DNOW AV_CPU_FLAG_3DNOW
+#define FF_MM_MMXEXT AV_CPU_FLAG_MMX2
+#define FF_MM_MMX2 AV_CPU_FLAG_MMX2
+#define FF_MM_SSE AV_CPU_FLAG_SSE
+#define FF_MM_SSE2 AV_CPU_FLAG_SSE2
+#define FF_MM_SSE2SLOW AV_CPU_FLAG_SSE2SLOW
+#define FF_MM_3DNOWEXT AV_CPU_FLAG_3DNOWEXT
+#define FF_MM_SSE3 AV_CPU_FLAG_SSE3
+#define FF_MM_SSE3SLOW AV_CPU_FLAG_SSE3SLOW
+#define FF_MM_SSSE3 AV_CPU_FLAG_SSSE3
+#define FF_MM_SSE4 AV_CPU_FLAG_SSE4
+#define FF_MM_SSE42 AV_CPU_FLAG_SSE42
+#define FF_MM_IWMMXT AV_CPU_FLAG_IWMMXT
+#define FF_MM_ALTIVEC AV_CPU_FLAG_ALTIVEC
+#endif
+
+ /**
+ * bits per sample/pixel from the demuxer (needed for huffyuv).
+ * - encoding: Set by libavcodec.
+ * - decoding: Set by user.
+ */
+ int bits_per_coded_sample;
+
+ /**
+ * prediction method (needed for huffyuv)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int prediction_method;
+#define FF_PRED_LEFT 0
+#define FF_PRED_PLANE 1
+#define FF_PRED_MEDIAN 2
+
+ /**
+ * sample aspect ratio (0 if unknown)
+ * That is the width of a pixel divided by the height of the pixel.
+ * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ AVRational sample_aspect_ratio;
+
+ /**
+ * the picture in the bitstream
+ * - encoding: Set by libavcodec.
+ * - decoding: Set by libavcodec.
+ */
+ AVFrame *coded_frame;
+
+ /**
+ * debug
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ int debug;
+#define FF_DEBUG_PICT_INFO 1
+#define FF_DEBUG_RC 2
+#define FF_DEBUG_BITSTREAM 4
+#define FF_DEBUG_MB_TYPE 8
+#define FF_DEBUG_QP 16
+#define FF_DEBUG_MV 32
+#define FF_DEBUG_DCT_COEFF 0x00000040
+#define FF_DEBUG_SKIP 0x00000080
+#define FF_DEBUG_STARTCODE 0x00000100
+#define FF_DEBUG_PTS 0x00000200
+#define FF_DEBUG_ER 0x00000400
+#define FF_DEBUG_MMCO 0x00000800
+#define FF_DEBUG_BUGS 0x00001000
+#define FF_DEBUG_VIS_QP 0x00002000
+#define FF_DEBUG_VIS_MB_TYPE 0x00004000
+#define FF_DEBUG_BUFFERS 0x00008000
+
+ /**
+ * debug
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ int debug_mv;
+#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
+#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
+#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
+
+ /**
+ * error
+ * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
+ * - decoding: unused
+ */
+ uint64_t error[4];
+
+ /**
+ * minimum MB quantizer
+ * - encoding: unused
+ * - decoding: unused
+ */
+ int mb_qmin;
+
+ /**
+ * maximum MB quantizer
+ * - encoding: unused
+ * - decoding: unused
+ */
+ int mb_qmax;
+
+ /**
+ * motion estimation comparison function
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int me_cmp;
+ /**
+ * subpixel motion estimation comparison function
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int me_sub_cmp;
+ /**
+ * macroblock comparison function (not supported yet)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int mb_cmp;
+ /**
+ * interlaced DCT comparison function
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int ildct_cmp;
+#define FF_CMP_SAD 0
+#define FF_CMP_SSE 1
+#define FF_CMP_SATD 2
+#define FF_CMP_DCT 3
+#define FF_CMP_PSNR 4
+#define FF_CMP_BIT 5
+#define FF_CMP_RD 6
+#define FF_CMP_ZERO 7
+#define FF_CMP_VSAD 8
+#define FF_CMP_VSSE 9
+#define FF_CMP_NSSE 10
+#define FF_CMP_W53 11
+#define FF_CMP_W97 12
+#define FF_CMP_DCTMAX 13
+#define FF_CMP_DCT264 14
+#define FF_CMP_CHROMA 256
+
+ /**
+ * ME diamond size & shape
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int dia_size;
+
+ /**
+ * amount of previous MV predictors (2a+1 x 2a+1 square)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int last_predictor_count;
+
+ /**
+ * prepass for motion estimation
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int pre_me;
+
+ /**
+ * motion estimation prepass comparison function
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int me_pre_cmp;
+
+ /**
+ * ME prepass diamond size & shape
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int pre_dia_size;
+
+ /**
+ * subpel ME quality
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int me_subpel_quality;
+
+ /**
+ * callback to negotiate the pixelFormat
+ * @param fmt is the list of formats which are supported by the codec,
+ * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
+ * The first is always the native one.
+ * @return the chosen format
+ * - encoding: unused
+ * - decoding: Set by user, if not set the native format will be chosen.
+ */
+ enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
+
+ /**
+ * DTG active format information (additional aspect ratio
+ * information only used in DVB MPEG-2 transport streams)
+ * 0 if not set.
+ *
+ * - encoding: unused
+ * - decoding: Set by decoder.
+ */
+ int dtg_active_format;
+#define FF_DTG_AFD_SAME 8
+#define FF_DTG_AFD_4_3 9
+#define FF_DTG_AFD_16_9 10
+#define FF_DTG_AFD_14_9 11
+#define FF_DTG_AFD_4_3_SP_14_9 13
+#define FF_DTG_AFD_16_9_SP_14_9 14
+#define FF_DTG_AFD_SP_4_3 15
+
+ /**
+ * maximum motion estimation search range in subpel units
+ * If 0 then no limit.
+ *
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int me_range;
+
+ /**
+ * intra quantizer bias
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int intra_quant_bias;
+#define FF_DEFAULT_QUANT_BIAS 999999
+
+ /**
+ * inter quantizer bias
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int inter_quant_bias;
+
+ /**
+ * color table ID
+ * - encoding: unused
+ * - decoding: Which clrtable should be used for 8bit RGB images.
+ * Tables have to be stored somewhere. FIXME
+ */
+ int color_table_id;
+
+ /**
+ * internal_buffer count
+ * Don't touch, used by libavcodec default_get_buffer().
+ */
+ int internal_buffer_count;
+
+ /**
+ * internal_buffers
+ * Don't touch, used by libavcodec default_get_buffer().
+ */
+ void *internal_buffer;
+
+ /**
+ * Global quality for codecs which cannot change it per frame.
+ * This should be proportional to MPEG-1/2/4 qscale.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int global_quality;
+
+#define FF_CODER_TYPE_VLC 0
+#define FF_CODER_TYPE_AC 1
+#define FF_CODER_TYPE_RAW 2
+#define FF_CODER_TYPE_RLE 3
+#define FF_CODER_TYPE_DEFLATE 4
+ /**
+ * coder type
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int coder_type;
+
+ /**
+ * context model
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int context_model;
+#if 0
+ /**
+ *
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
+#endif
+
+ /**
+ * slice flags
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int slice_flags;
+#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
+#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
+#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
+
+ /**
+ * XVideo Motion Acceleration
+ * - encoding: forbidden
+ * - decoding: set by decoder
+ */
+ int xvmc_acceleration;
+
+ /**
+ * macroblock decision mode
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int mb_decision;
+#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
+#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
+#define FF_MB_DECISION_RD 2 ///< rate distortion
+
+ /**
+ * custom intra quantization matrix
+ * - encoding: Set by user, can be NULL.
+ * - decoding: Set by libavcodec.
+ */
+ uint16_t *intra_matrix;
+
+ /**
+ * custom inter quantization matrix
+ * - encoding: Set by user, can be NULL.
+ * - decoding: Set by libavcodec.
+ */
+ uint16_t *inter_matrix;
+
+ /**
+ * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
+ * This is used to work around some encoder bugs.
+ * - encoding: unused
+ * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
+ */
+ unsigned int stream_codec_tag;
+
+ /**
+ * scene change detection threshold
+ * 0 is default, larger means fewer detected scene changes.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int scenechange_threshold;
+
+ /**
+ * minimum Lagrange multipler
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int lmin;
+
+ /**
+ * maximum Lagrange multipler
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int lmax;
+
+#if FF_API_PALETTE_CONTROL
+ /**
+ * palette control structure
+ * - encoding: ??? (no palette-enabled encoder yet)
+ * - decoding: Set by user.
+ */
+ struct AVPaletteControl *palctrl;
+#endif
+
+ /**
+ * noise reduction strength
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int noise_reduction;
+
+ /**
+ * Called at the beginning of a frame to get cr buffer for it.
+ * Buffer type (size, hints) must be the same. libavcodec won't check it.
+ * libavcodec will pass previous buffer in pic, function should return
+ * same buffer or new buffer with old frame "painted" into it.
+ * If pic.data[0] == NULL must behave like get_buffer().
+ * if CODEC_CAP_DR1 is not set then reget_buffer() must call
+ * avcodec_default_reget_buffer() instead of providing buffers allocated by
+ * some other means.
+ * - encoding: unused
+ * - decoding: Set by libavcodec, user can override.
+ */
+ int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+ /**
+ * Number of bits which should be loaded into the rc buffer before decoding starts.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int rc_initial_buffer_occupancy;
+
+ /**
+ *
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int inter_threshold;
+
+ /**
+ * CODEC_FLAG2_*
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ int flags2;
+
+ /**
+ * Simulates errors in the bitstream to test error concealment.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int error_rate;
+
+ /**
+ * MP3 antialias algorithm, see FF_AA_* below.
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int antialias_algo;
+#define FF_AA_AUTO 0
+#define FF_AA_FASTINT 1 //not implemented yet
+#define FF_AA_INT 2
+#define FF_AA_FLOAT 3
+ /**
+ * quantizer noise shaping
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int quantizer_noise_shaping;
+
+ /**
+ * thread count
+ * is used to decide how many independent tasks should be passed to execute()
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ int thread_count;
+
+ /**
+ * The codec may call this to execute several independent things.
+ * It will return only after finishing all tasks.
+ * The user may replace this with some multithreaded implementation,
+ * the default implementation will execute the parts serially.
+ * @param count the number of things to execute
+ * - encoding: Set by libavcodec, user can override.
+ * - decoding: Set by libavcodec, user can override.
+ */
+ int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
+
+ /**
+ * thread opaque
+ * Can be used by execute() to store some per AVCodecContext stuff.
+ * - encoding: set by execute()
+ * - decoding: set by execute()
+ */
+ void *thread_opaque;
+
+ /**
+ * Motion estimation threshold below which no motion estimation is
+ * performed, but instead the user specified motion vectors are used.
+ *
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int me_threshold;
+
+ /**
+ * Macroblock threshold below which the user specified macroblock types will be used.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int mb_threshold;
+
+ /**
+ * precision of the intra DC coefficient - 8
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int intra_dc_precision;
+
+ /**
+ * noise vs. sse weight for the nsse comparsion function
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int nsse_weight;
+
+ /**
+ * Number of macroblock rows at the top which are skipped.
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int skip_top;
+
+ /**
+ * Number of macroblock rows at the bottom which are skipped.
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int skip_bottom;
+
+ /**
+ * profile
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ int profile;
+#define FF_PROFILE_UNKNOWN -99
+
+#define FF_PROFILE_AAC_MAIN 0
+#define FF_PROFILE_AAC_LOW 1
+#define FF_PROFILE_AAC_SSR 2
+#define FF_PROFILE_AAC_LTP 3
+
+#define FF_PROFILE_DTS 20
+#define FF_PROFILE_DTS_ES 30
+#define FF_PROFILE_DTS_96_24 40
+#define FF_PROFILE_DTS_HD_HRA 50
+#define FF_PROFILE_DTS_HD_MA 60
+
+#define FF_PROFILE_H264_BASELINE 66
+#define FF_PROFILE_H264_MAIN 77
+#define FF_PROFILE_H264_EXTENDED 88
+#define FF_PROFILE_H264_HIGH 100
+#define FF_PROFILE_H264_HIGH_10 110
+#define FF_PROFILE_H264_HIGH_422 122
+#define FF_PROFILE_H264_HIGH_444 244
+#define FF_PROFILE_H264_CAVLC_444 44
+
+ /**
+ * level
+ * - encoding: Set by user.
+ * - decoding: Set by libavcodec.
+ */
+ int level;
+#define FF_LEVEL_UNKNOWN -99
+
+ /**
+ * low resolution decoding, 1-> 1/2 size, 2->1/4 size
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int lowres;
+
+ /**
+ * Bitstream width / height, may be different from width/height if lowres
+ * or other things are used.
+ * - encoding: unused
+ * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
+ */
+ int coded_width, coded_height;
+
+ /**
+ * frame skip threshold
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int frame_skip_threshold;
+
+ /**
+ * frame skip factor
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int frame_skip_factor;
+
+ /**
+ * frame skip exponent
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int frame_skip_exp;
+
+ /**
+ * frame skip comparison function
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int frame_skip_cmp;
+
+ /**
+ * Border processing masking, raises the quantizer for mbs on the borders
+ * of the picture.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float border_masking;
+
+ /**
+ * minimum MB lagrange multipler
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int mb_lmin;
+
+ /**
+ * maximum MB lagrange multipler
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int mb_lmax;
+
+ /**
+ *
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int me_penalty_compensation;
+
+ /**
+ *
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ enum AVDiscard skip_loop_filter;
+
+ /**
+ *
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ enum AVDiscard skip_idct;
+
+ /**
+ *
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ enum AVDiscard skip_frame;
+
+ /**
+ *
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int bidir_refine;
+
+ /**
+ *
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int brd_scale;
+
+ /**
+ * constant rate factor - quality-based VBR - values ~correspond to qps
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float crf;
+
+ /**
+ * constant quantization parameter rate control method
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int cqp;
+
+ /**
+ * minimum GOP size
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int keyint_min;
+
+ /**
+ * number of reference frames
+ * - encoding: Set by user.
+ * - decoding: Set by lavc.
+ */
+ int refs;
+
+ /**
+ * chroma qp offset from luma
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int chromaoffset;
+
+ /**
+ * Influences how often B-frames are used.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int bframebias;
+
+ /**
+ * trellis RD quantization
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int trellis;
+
+ /**
+ * Reduce fluctuations in qp (before curve compression).
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float complexityblur;
+
+ /**
+ * in-loop deblocking filter alphac0 parameter
+ * alpha is in the range -6...6
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int deblockalpha;
+
+ /**
+ * in-loop deblocking filter beta parameter
+ * beta is in the range -6...6
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int deblockbeta;
+
+ /**
+ * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int partitions;
+#define X264_PART_I4X4 0x001 /* Analyze i4x4 */
+#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
+#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
+#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
+#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
+
+ /**
+ * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int directpred;
+
+ /**
+ * Audio cutoff bandwidth (0 means "automatic")
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int cutoff;
+
+ /**
+ * Multiplied by qscale for each frame and added to scene_change_score.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int scenechange_factor;
+
+ /**
+ *
+ * Note: Value depends upon the compare function used for fullpel ME.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int mv0_threshold;
+
+ /**
+ * Adjusts sensitivity of b_frame_strategy 1.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int b_sensitivity;
+
+ /**
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int compression_level;
+#define FF_COMPRESSION_DEFAULT -1
+
+#if FF_API_USE_LPC
+ /**
+ * Sets whether to use LPC mode - used by FLAC encoder.
+ * - encoding: Set by user.
+ * - decoding: unused
+ * @deprecated Deprecated in favor of lpc_type and lpc_passes.
+ */
+ int use_lpc;
+#endif
+
+ /**
+ * LPC coefficient precision - used by FLAC encoder
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int lpc_coeff_precision;
+
+ /**
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int min_prediction_order;
+
+ /**
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int max_prediction_order;
+
+ /**
+ * search method for selecting prediction order
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int prediction_order_method;
+
+ /**
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int min_partition_order;
+
+ /**
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int max_partition_order;
+
+ /**
+ * GOP timecode frame start number, in non drop frame format
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int64_t timecode_frame_start;
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+ /**
+ * Decoder should decode to this many channels if it can (0 for default)
+ * - encoding: unused
+ * - decoding: Set by user.
+ * @deprecated Deprecated in favor of request_channel_layout.
+ */
+ int request_channels;
+#endif
+
+ /**
+ * Percentage of dynamic range compression to be applied by the decoder.
+ * The default value is 1.0, corresponding to full compression.
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ float drc_scale;
+
+ /**
+ * opaque 64bit number (generally a PTS) that will be reordered and
+ * output in AVFrame.reordered_opaque
+ * @deprecated in favor of pkt_pts
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int64_t reordered_opaque;
+
+ /**
+ * Bits per sample/pixel of internal libavcodec pixel/sample format.
+ * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
+ * - encoding: set by user.
+ * - decoding: set by libavcodec.
+ */
+ int bits_per_raw_sample;
+
+ /**
+ * Audio channel layout.
+ * - encoding: set by user.
+ * - decoding: set by libavcodec.
+ */
+ int64_t channel_layout;
+
+ /**
+ * Request decoder to use this channel layout if it can (0 for default)
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int64_t request_channel_layout;
+
+ /**
+ * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
+ * - encoding: Set by user.
+ * - decoding: unused.
+ */
+ float rc_max_available_vbv_use;
+
+ /**
+ * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
+ * - encoding: Set by user.
+ * - decoding: unused.
+ */
+ float rc_min_vbv_overflow_use;
+
+ /**
+ * Hardware accelerator in use
+ * - encoding: unused.
+ * - decoding: Set by libavcodec
+ */
+ struct AVHWAccel *hwaccel;
+
+ /**
+ * For some codecs, the time base is closer to the field rate than the frame rate.
+ * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
+ * if no telecine is used ...
+ *
+ * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
+ */
+ int ticks_per_frame;
+
+ /**
+ * Hardware accelerator context.
+ * For some hardware accelerators, a global context needs to be
+ * provided by the user. In that case, this holds display-dependent
+ * data FFmpeg cannot instantiate itself. Please refer to the
+ * FFmpeg HW accelerator documentation to know how to fill this
+ * is. e.g. for VA API, this is a struct vaapi_context.
+ * - encoding: unused
+ * - decoding: Set by user
+ */
+ void *hwaccel_context;
+
+ /**
+ * Chromaticity coordinates of the source primaries.
+ * - encoding: Set by user
+ * - decoding: Set by libavcodec
+ */
+ enum AVColorPrimaries color_primaries;
+
+ /**
+ * Color Transfer Characteristic.
+ * - encoding: Set by user
+ * - decoding: Set by libavcodec
+ */
+ enum AVColorTransferCharacteristic color_trc;
+
+ /**
+ * YUV colorspace type.
+ * - encoding: Set by user
+ * - decoding: Set by libavcodec
+ */
+ enum AVColorSpace colorspace;
+
+ /**
+ * MPEG vs JPEG YUV range.
+ * - encoding: Set by user
+ * - decoding: Set by libavcodec
+ */
+ enum AVColorRange color_range;
+
+ /**
+ * This defines the location of chroma samples.
+ * - encoding: Set by user
+ * - decoding: Set by libavcodec
+ */
+ enum AVChromaLocation chroma_sample_location;
+
+ /**
+ * The codec may call this to execute several independent things.
+ * It will return only after finishing all tasks.
+ * The user may replace this with some multithreaded implementation,
+ * the default implementation will execute the parts serially.
+ * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
+ * @param c context passed also to func
+ * @param count the number of things to execute
+ * @param arg2 argument passed unchanged to func
+ * @param ret return values of executed functions, must have space for "count" values. May be NULL.
+ * @param func function that will be called count times, with jobnr from 0 to count-1.
+ * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
+ * two instances of func executing at the same time will have the same threadnr.
+ * @return always 0 currently, but code should handle a future improvement where when any call to func
+ * returns < 0 no further calls to func may be done and < 0 is returned.
+ * - encoding: Set by libavcodec, user can override.
+ * - decoding: Set by libavcodec, user can override.
+ */
+ int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
+
+ /**
+ * explicit P-frame weighted prediction analysis method
+ * 0: off
+ * 1: fast blind weighting (one reference duplicate with -1 offset)
+ * 2: smart weighting (full fade detection analysis)
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ int weighted_p_pred;
+
+ /**
+ * AQ mode
+ * 0: Disabled
+ * 1: Variance AQ (complexity mask)
+ * 2: Auto-variance AQ (experimental)
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ int aq_mode;
+
+ /**
+ * AQ strength
+ * Reduces blocking and blurring in flat and textured areas.
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ float aq_strength;
+
+ /**
+ * PSY RD
+ * Strength of psychovisual optimization
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ float psy_rd;
+
+ /**
+ * PSY trellis
+ * Strength of psychovisual optimization
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ float psy_trellis;
+
+ /**
+ * RC lookahead
+ * Number of frames for frametype and ratecontrol lookahead
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ int rc_lookahead;
+
+ /**
+ * Constant rate factor maximum
+ * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
+ * than crf_max, even if doing so would violate VBV restrictions.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float crf_max;
+
+ int log_level_offset;
+
+ /**
+ * Determines which LPC analysis algorithm to use.
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ enum AVLPCType lpc_type;
+
+ /**
+ * Number of passes to use for Cholesky factorization during LPC analysis
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ int lpc_passes;
+
+ /**
+ * Number of slices.
+ * Indicates number of picture subdivisions. Used for parallelized
+ * decoding.
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ int slices;
+
+ /**
+ * Header containing style information for text subtitles.
+ * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
+ * [Script Info] and [V4+ Styles] section, plus the [Events] line and
+ * the Format line following. It shouldn't include any Dialogue line.
+ * - encoding: Set/allocated/freed by user (before avcodec_open())
+ * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
+ */
+ uint8_t *subtitle_header;
+ int subtitle_header_size;
+
+ /**
+ * Current packet as passed into the decoder, to avoid having
+ * to pass the packet into every function. Currently only valid
+ * inside lavc and get/release_buffer callbacks.
+ * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
+ * - encoding: unused
+ */
+ AVPacket *pkt;
+} AVCodecContext;
+
+/**
+ * AVProfile.
+ */
+typedef struct AVProfile {
+ int profile;
+ const char *name; ///< short name for the profile
+} AVProfile;
+
+/**
+ * AVCodec.
+ */
+typedef struct AVCodec {
+ /**
+ * Name of the codec implementation.
+ * The name is globally unique among encoders and among decoders (but an
+ * encoder and a decoder can share the same name).
+ * This is the primary way to find a codec from the user perspective.
+ */
+ const char *name;
+ enum AVMediaType type;
+ enum CodecID id;
+ int priv_data_size;
+ int (*init)(AVCodecContext *);
+ int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
+ int (*close)(AVCodecContext *);
+ int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
+ /**
+ * Codec capabilities.
+ * see CODEC_CAP_*
+ */
+ int capabilities;
+ struct AVCodec *next;
+ /**
+ * Flush buffers.
+ * Will be called when seeking
+ */
+ void (*flush)(AVCodecContext *);
+ const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
+ const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
+ /**
+ * Descriptive name for the codec, meant to be more human readable than name.
+ * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
+ */
+ const char *long_name;
+ const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
+ const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
+ const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
+ uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
+ AVClass *priv_class; ///< AVClass for the private context
+ const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
+} AVCodec;
+
+/**
+ * AVHWAccel.
+ */
+typedef struct AVHWAccel {
+ /**
+ * Name of the hardware accelerated codec.
+ * The name is globally unique among encoders and among decoders (but an
+ * encoder and a decoder can share the same name).
+ */
+ const char *name;
+
+ /**
+ * Type of codec implemented by the hardware accelerator.
+ *
+ * See AVMEDIA_TYPE_xxx
+ */
+ enum AVMediaType type;
+
+ /**
+ * Codec implemented by the hardware accelerator.
+ *
+ * See CODEC_ID_xxx
+ */
+ enum CodecID id;
+
+ /**
+ * Supported pixel format.
+ *
+ * Only hardware accelerated formats are supported here.
+ */
+ enum PixelFormat pix_fmt;
+
+ /**
+ * Hardware accelerated codec capabilities.
+ * see FF_HWACCEL_CODEC_CAP_*
+ */
+ int capabilities;
+
+ struct AVHWAccel *next;
+
+ /**
+ * Called at the beginning of each frame or field picture.
+ *
+ * Meaningful frame information (codec specific) is guaranteed to
+ * be parsed at this point. This function is mandatory.
+ *
+ * Note that buf can be NULL along with buf_size set to 0.
+ * Otherwise, this means the whole frame is available at this point.
+ *
+ * @param avctx the codec context
+ * @param buf the frame data buffer base
+ * @param buf_size the size of the frame in bytes
+ * @return zero if successful, a negative value otherwise
+ */
+ int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
+
+ /**
+ * Callback for each slice.
+ *
+ * Meaningful slice information (codec specific) is guaranteed to
+ * be parsed at this point. This function is mandatory.
+ *
+ * @param avctx the codec context
+ * @param buf the slice data buffer base
+ * @param buf_size the size of the slice in bytes
+ * @return zero if successful, a negative value otherwise
+ */
+ int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
+
+ /**
+ * Called at the end of each frame or field picture.
+ *
+ * The whole picture is parsed at this point and can now be sent
+ * to the hardware accelerator. This function is mandatory.
+ *
+ * @param avctx the codec context
+ * @return zero if successful, a negative value otherwise
+ */
+ int (*end_frame)(AVCodecContext *avctx);
+
+ /**
+ * Size of HW accelerator private data.
+ *
+ * Private data is allocated with av_mallocz() before
+ * AVCodecContext.get_buffer() and deallocated after
+ * AVCodecContext.release_buffer().
+ */
+ int priv_data_size;
+} AVHWAccel;
+
+/**
+ * four components are given, that's all.
+ * the last component is alpha
+ */
+typedef struct AVPicture {
+ uint8_t *data[4];
+ int linesize[4]; ///< number of bytes per line
+} AVPicture;
+
+#if FF_API_PALETTE_CONTROL
+/**
+ * AVPaletteControl
+ * This structure defines a method for communicating palette changes
+ * between and demuxer and a decoder.
+ *
+ * @deprecated Use AVPacket to send palette changes instead.
+ * This is totally broken.
+ */
+#define AVPALETTE_SIZE 1024
+#define AVPALETTE_COUNT 256
+typedef struct AVPaletteControl {
+
+ /* Demuxer sets this to 1 to indicate the palette has changed;
+ * decoder resets to 0. */
+ int palette_changed;
+
+ /* 4-byte ARGB palette entries, stored in native byte order; note that
+ * the individual palette components should be on a 8-bit scale; if
+ * the palette data comes from an IBM VGA native format, the component
+ * data is probably 6 bits in size and needs to be scaled. */
+ unsigned int palette[AVPALETTE_COUNT];
+
+} AVPaletteControl attribute_deprecated;
+#endif
+
+enum AVSubtitleType {
+ SUBTITLE_NONE,
+
+ SUBTITLE_BITMAP, ///< A bitmap, pict will be set
+
+ /**
+ * Plain text, the text field must be set by the decoder and is
+ * authoritative. ass and pict fields may contain approximations.
+ */
+ SUBTITLE_TEXT,
+
+ /**
+ * Formatted text, the ass field must be set by the decoder and is
+ * authoritative. pict and text fields may contain approximations.
+ */
+ SUBTITLE_ASS,
+};
+
+typedef struct AVSubtitleRect {
+ int x; ///< top left corner of pict, undefined when pict is not set
+ int y; ///< top left corner of pict, undefined when pict is not set
+ int w; ///< width of pict, undefined when pict is not set
+ int h; ///< height of pict, undefined when pict is not set
+ int nb_colors; ///< number of colors in pict, undefined when pict is not set
+
+ /**
+ * data+linesize for the bitmap of this subtitle.
+ * can be set for text/ass as well once they where rendered
+ */
+ AVPicture pict;
+ enum AVSubtitleType type;
+
+ char *text; ///< 0 terminated plain UTF-8 text
+
+ /**
+ * 0 terminated ASS/SSA compatible event line.
+ * The pressentation of this is unaffected by the other values in this
+ * struct.
+ */
+ char *ass;
+} AVSubtitleRect;
+
+typedef struct AVSubtitle {
+ uint16_t format; /* 0 = graphics */
+ uint32_t start_display_time; /* relative to packet pts, in ms */
+ uint32_t end_display_time; /* relative to packet pts, in ms */
+ unsigned num_rects;
+ AVSubtitleRect **rects;
+ int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
+} AVSubtitle;
+
+/* packet functions */
+
+/**
+ * @deprecated use NULL instead
+ */
+attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
+
+/**
+ * Default packet destructor.
+ */
+void av_destruct_packet(AVPacket *pkt);
+
+/**
+ * Initialize optional fields of a packet with default values.
+ *
+ * @param pkt packet
+ */
+void av_init_packet(AVPacket *pkt);
+
+/**
+ * Allocate the payload of a packet and initialize its fields with
+ * default values.
+ *
+ * @param pkt packet
+ * @param size wanted payload size
+ * @return 0 if OK, AVERROR_xxx otherwise
+ */
+int av_new_packet(AVPacket *pkt, int size);
+
+/**
+ * Reduce packet size, correctly zeroing padding
+ *
+ * @param pkt packet
+ * @param size new size
+ */
+void av_shrink_packet(AVPacket *pkt, int size);
+
+/**
+ * Increase packet size, correctly zeroing padding
+ *
+ * @param pkt packet
+ * @param grow_by number of bytes by which to increase the size of the packet
+ */
+int av_grow_packet(AVPacket *pkt, int grow_by);
+
+/**
+ * @warning This is a hack - the packet memory allocation stuff is broken. The
+ * packet is allocated if it was not really allocated.
+ */
+int av_dup_packet(AVPacket *pkt);
+
+/**
+ * Free a packet.
+ *
+ * @param pkt packet to free
+ */
+void av_free_packet(AVPacket *pkt);
+
+/* resample.c */
+
+struct ReSampleContext;
+struct AVResampleContext;
+
+typedef struct ReSampleContext ReSampleContext;
+
+#if FF_API_AUDIO_OLD
+/**
+ * @deprecated Use av_audio_resample_init() instead.
+ */
+attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
+ int output_rate, int input_rate);
+#endif
+/**
+ * Initialize audio resampling context
+ *
+ * @param output_channels number of output channels
+ * @param input_channels number of input channels
+ * @param output_rate output sample rate
+ * @param input_rate input sample rate
+ * @param sample_fmt_out requested output sample format
+ * @param sample_fmt_in input sample format
+ * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear If 1 then the used FIR filter will be linearly interpolated
+ between the 2 closest, if 0 the closest will be used
+ * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ * @return allocated ReSampleContext, NULL if error occured
+ */
+ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
+ int output_rate, int input_rate,
+ enum AVSampleFormat sample_fmt_out,
+ enum AVSampleFormat sample_fmt_in,
+ int filter_length, int log2_phase_count,
+ int linear, double cutoff);
+
+int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
+void audio_resample_close(ReSampleContext *s);
+
+
+/**
+ * Initialize an audio resampler.
+ * Note, if either rate is not an integer then simply scale both rates up so they are.
+ * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear If 1 then the used FIR filter will be linearly interpolated
+ between the 2 closest, if 0 the closest will be used
+ * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ */
+struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
+
+/**
+ * Resample an array of samples using a previously configured context.
+ * @param src an array of unconsumed samples
+ * @param consumed the number of samples of src which have been consumed are returned here
+ * @param src_size the number of unconsumed samples available
+ * @param dst_size the amount of space in samples available in dst
+ * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
+ * @return the number of samples written in dst or -1 if an error occurred
+ */
+int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
+
+
+/**
+ * Compensate samplerate/timestamp drift. The compensation is done by changing
+ * the resampler parameters, so no audible clicks or similar distortions occur
+ * @param compensation_distance distance in output samples over which the compensation should be performed
+ * @param sample_delta number of output samples which should be output less
+ *
+ * example: av_resample_compensate(c, 10, 500)
+ * here instead of 510 samples only 500 samples would be output
+ *
+ * note, due to rounding the actual compensation might be slightly different,
+ * especially if the compensation_distance is large and the in_rate used during init is small
+ */
+void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
+void av_resample_close(struct AVResampleContext *c);
+
+/**
+ * Allocate memory for a picture. Call avpicture_free to free it.
+ *
+ * @param picture the picture to be filled in
+ * @param pix_fmt the format of the picture
+ * @param width the width of the picture
+ * @param height the height of the picture
+ * @return zero if successful, a negative value if not
+ */
+int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ * Free a picture previously allocated by avpicture_alloc().
+ *
+ * @param picture the AVPicture to be freed
+ */
+void avpicture_free(AVPicture *picture);
+
+/**
+ * Fill in the AVPicture fields.
+ * The fields of the given AVPicture are filled in by using the 'ptr' address
+ * which points to the image data buffer. Depending on the specified picture
+ * format, one or multiple image data pointers and line sizes will be set.
+ * If a planar format is specified, several pointers will be set pointing to
+ * the different picture planes and the line sizes of the different planes
+ * will be stored in the lines_sizes array.
+ * Call with ptr == NULL to get the required size for the ptr buffer.
+ *
+ * @param picture AVPicture whose fields are to be filled in
+ * @param ptr Buffer which will contain or contains the actual image data
+ * @param pix_fmt The format in which the picture data is stored.
+ * @param width the width of the image in pixels
+ * @param height the height of the image in pixels
+ * @return size of the image data in bytes
+ */
+int avpicture_fill(AVPicture *picture, uint8_t *ptr,
+ enum PixelFormat pix_fmt, int width, int height);
+int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
+ unsigned char *dest, int dest_size);
+
+/**
+ * Calculate the size in bytes that a picture of the given width and height
+ * would occupy if stored in the given picture format.
+ * Note that this returns the size of a compact representation as generated
+ * by avpicture_layout, which can be smaller than the size required for e.g.
+ * avpicture_fill.
+ *
+ * @param pix_fmt the given picture format
+ * @param width the width of the image
+ * @param height the height of the image
+ * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
+ */
+int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
+void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
+const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
+void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+/**
+ * Return the pixel format corresponding to the name name.
+ *
+ * If there is no pixel format with name name, then look for a
+ * pixel format with the name corresponding to the native endian
+ * format of name.
+ * For example in a little-endian system, first look for "gray16",
+ * then for "gray16le".
+ *
+ * Finally if no pixel format has been found, return PIX_FMT_NONE.
+ *
+ * @deprecated Deprecated in favor of av_get_pix_fmt().
+ */
+attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
+#endif
+
+/**
+ * Return a value representing the fourCC code associated to the
+ * pixel format pix_fmt, or 0 if no associated fourCC code can be
+ * found.
+ */
+unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
+
+/**
+ * Put a string representing the codec tag codec_tag in buf.
+ *
+ * @param buf_size size in bytes of buf
+ * @return the length of the string that would have been generated if
+ * enough space had been available, excluding the trailing null
+ */
+size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
+
+#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
+#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
+#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
+#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
+#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
+#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
+
+/**
+ * Compute what kind of losses will occur when converting from one specific
+ * pixel format to another.
+ * When converting from one pixel format to another, information loss may occur.
+ * For example, when converting from RGB24 to GRAY, the color information will
+ * be lost. Similarly, other losses occur when converting from some formats to
+ * other formats. These losses can involve loss of chroma, but also loss of
+ * resolution, loss of color depth, loss due to the color space conversion, loss
+ * of the alpha bits or loss due to color quantization.
+ * avcodec_get_fix_fmt_loss() informs you about the various types of losses
+ * which will occur when converting from one pixel format to another.
+ *
+ * @param[in] dst_pix_fmt destination pixel format
+ * @param[in] src_pix_fmt source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @return Combination of flags informing you what kind of losses will occur.
+ */
+int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
+ int has_alpha);
+
+/**
+ * Find the best pixel format to convert to given a certain source pixel
+ * format. When converting from one pixel format to another, information loss
+ * may occur. For example, when converting from RGB24 to GRAY, the color
+ * information will be lost. Similarly, other losses occur when converting from
+ * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ * The pixel formats from which it chooses one, are determined by the
+ * pix_fmt_mask parameter.
+ *
+ * @code
+ * src_pix_fmt = PIX_FMT_YUV420P;
+ * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
+ * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
+ * @endcode
+ *
+ * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
+ * @param[in] src_pix_fmt source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
+ * @return The best pixel format to convert to or -1 if none was found.
+ */
+enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
+ int has_alpha, int *loss_ptr);
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+/**
+ * @deprecated Use av_get_pix_fmt_string() instead.
+ */
+attribute_deprecated
+void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
+#endif
+
+#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
+#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
+
+/**
+ * Tell if an image really has transparent alpha values.
+ * @return ored mask of FF_ALPHA_xxx constants
+ */
+int img_get_alpha_info(const AVPicture *src,
+ enum PixelFormat pix_fmt, int width, int height);
+
+/* deinterlace a picture */
+/* deinterlace - if not supported return -1 */
+int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
+ enum PixelFormat pix_fmt, int width, int height);
+
+/* external high level API */
+
+/**
+ * If c is NULL, returns the first registered codec,
+ * if c is non-NULL, returns the next registered codec after c,
+ * or NULL if c is the last one.
+ */
+AVCodec *av_codec_next(AVCodec *c);
+
+/**
+ * Return the LIBAVCODEC_VERSION_INT constant.
+ */
+unsigned avcodec_version(void);
+
+/**
+ * Return the libavcodec build-time configuration.
+ */
+const char *avcodec_configuration(void);
+
+/**
+ * Return the libavcodec license.
+ */
+const char *avcodec_license(void);
+
+/**
+ * Initialize libavcodec.
+ *
+ * @warning This function must be called before any other libavcodec
+ * function.
+ */
+void avcodec_init(void);
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+/**
+ * @deprecated Deprecated in favor of avcodec_register().
+ */
+attribute_deprecated void register_avcodec(AVCodec *codec);
+#endif
+
+/**
+ * Register the codec codec and initialize libavcodec.
+ *
+ * @see avcodec_init()
+ */
+void avcodec_register(AVCodec *codec);
+
+/**
+ * Find a registered encoder with a matching codec ID.
+ *
+ * @param id CodecID of the requested encoder
+ * @return An encoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_encoder(enum CodecID id);
+
+/**
+ * Find a registered encoder with the specified name.
+ *
+ * @param name name of the requested encoder
+ * @return An encoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_encoder_by_name(const char *name);
+
+/**
+ * Find a registered decoder with a matching codec ID.
+ *
+ * @param id CodecID of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_decoder(enum CodecID id);
+
+/**
+ * Find a registered decoder with the specified name.
+ *
+ * @param name name of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_decoder_by_name(const char *name);
+void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
+
+/**
+ * Return a name for the specified profile, if available.
+ *
+ * @param codec the codec that is searched for the given profile
+ * @param profile the profile value for which a name is requested
+ * @return A name for the profile if found, NULL otherwise.
+ */
+const char *av_get_profile_name(const AVCodec *codec, int profile);
+
+/**
+ * Set the fields of the given AVCodecContext to default values.
+ *
+ * @param s The AVCodecContext of which the fields should be set to default values.
+ */
+void avcodec_get_context_defaults(AVCodecContext *s);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
+
+/**
+ * Allocate an AVCodecContext and set its fields to default values. The
+ * resulting struct can be deallocated by simply calling av_free().
+ *
+ * @return An AVCodecContext filled with default values or NULL on failure.
+ * @see avcodec_get_context_defaults
+ */
+AVCodecContext *avcodec_alloc_context(void);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
+
+/**
+ * Copy the settings of the source AVCodecContext into the destination
+ * AVCodecContext. The resulting destination codec context will be
+ * unopened, i.e. you are required to call avcodec_open() before you
+ * can use this AVCodecContext to decode/encode video/audio data.
+ *
+ * @param dest target codec context, should be initialized with
+ * avcodec_alloc_context(), but otherwise uninitialized
+ * @param src source codec context
+ * @return AVERROR() on error (e.g. memory allocation error), 0 on success
+ */
+int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
+
+/**
+ * Set the fields of the given AVFrame to default values.
+ *
+ * @param pic The AVFrame of which the fields should be set to default values.
+ */
+void avcodec_get_frame_defaults(AVFrame *pic);
+
+/**
+ * Allocate an AVFrame and set its fields to default values. The resulting
+ * struct can be deallocated by simply calling av_free().
+ *
+ * @return An AVFrame filled with default values or NULL on failure.
+ * @see avcodec_get_frame_defaults
+ */
+AVFrame *avcodec_alloc_frame(void);
+
+int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
+void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
+int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
+
+/**
+ * Return the amount of padding in pixels which the get_buffer callback must
+ * provide around the edge of the image for codecs which do not have the
+ * CODEC_FLAG_EMU_EDGE flag.
+ *
+ * @return Required padding in pixels.
+ */
+unsigned avcodec_get_edge_width(void);
+/**
+ * Modify width and height values so that they will result in a memory
+ * buffer that is acceptable for the codec if you do not use any horizontal
+ * padding.
+ *
+ * May only be used if a codec with CODEC_CAP_DR1 has been opened.
+ * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
+ * according to avcodec_get_edge_width() before.
+ */
+void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
+/**
+ * Modify width and height values so that they will result in a memory
+ * buffer that is acceptable for the codec if you also ensure that all
+ * line sizes are a multiple of the respective linesize_align[i].
+ *
+ * May only be used if a codec with CODEC_CAP_DR1 has been opened.
+ * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
+ * according to avcodec_get_edge_width() before.
+ */
+void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
+ int linesize_align[4]);
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+/**
+ * @deprecated Deprecated in favor of av_check_image_size().
+ */
+attribute_deprecated
+int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
+#endif
+
+enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
+
+int avcodec_thread_init(AVCodecContext *s, int thread_count);
+void avcodec_thread_free(AVCodecContext *s);
+int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
+int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
+//FIXME func typedef
+
+/**
+ * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
+ * function the context has to be allocated.
+ *
+ * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
+ * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
+ * retrieving a codec.
+ *
+ * @warning This function is not thread safe!
+ *
+ * @code
+ * avcodec_register_all();
+ * codec = avcodec_find_decoder(CODEC_ID_H264);
+ * if (!codec)
+ * exit(1);
+ *
+ * context = avcodec_alloc_context();
+ *
+ * if (avcodec_open(context, codec) < 0)
+ * exit(1);
+ * @endcode
+ *
+ * @param avctx The context which will be set up to use the given codec.
+ * @param codec The codec to use within the context.
+ * @return zero on success, a negative value on error
+ * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
+ */
+int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
+
+#if FF_API_AUDIO_OLD
+/**
+ * Decode an audio frame from buf into samples.
+ * Wrapper function which calls avcodec_decode_audio3.
+ *
+ * @deprecated Use avcodec_decode_audio3 instead.
+ * @param avctx the codec context
+ * @param[out] samples the output buffer
+ * @param[in,out] frame_size_ptr the output buffer size in bytes
+ * @param[in] buf the input buffer
+ * @param[in] buf_size the input buffer size in bytes
+ * @return On error a negative value is returned, otherwise the number of bytes
+ * used or zero if no frame could be decompressed.
+ */
+attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
+ int *frame_size_ptr,
+ const uint8_t *buf, int buf_size);
+#endif
+
+/**
+ * Decode the audio frame of size avpkt->size from avpkt->data into samples.
+ * Some decoders may support multiple frames in a single AVPacket, such
+ * decoders would then just decode the first frame. In this case,
+ * avcodec_decode_audio3 has to be called again with an AVPacket that contains
+ * the remaining data in order to decode the second frame etc.
+ * If no frame
+ * could be outputted, frame_size_ptr is zero. Otherwise, it is the
+ * decompressed frame size in bytes.
+ *
+ * @warning You must set frame_size_ptr to the allocated size of the
+ * output buffer before calling avcodec_decode_audio3().
+ *
+ * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
+ * the actual read bytes because some optimized bitstream readers read 32 or 64
+ * bits at once and could read over the end.
+ *
+ * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
+ * no overreading happens for damaged MPEG streams.
+ *
+ * @note You might have to align the input buffer avpkt->data and output buffer
+ * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
+ * necessary at all, on others it won't work at all if not aligned and on others
+ * it will work but it will have an impact on performance.
+ *
+ * In practice, avpkt->data should have 4 byte alignment at minimum and
+ * samples should be 16 byte aligned unless the CPU doesn't need it
+ * (AltiVec and SSE do).
+ *
+ * @param avctx the codec context
+ * @param[out] samples the output buffer, sample type in avctx->sample_fmt
+ * @param[in,out] frame_size_ptr the output buffer size in bytes
+ * @param[in] avpkt The input AVPacket containing the input buffer.
+ * You can create such packet with av_init_packet() and by then setting
+ * data and size, some decoders might in addition need other fields.
+ * All decoders are designed to use the least fields possible though.
+ * @return On error a negative value is returned, otherwise the number of bytes
+ * used or zero if no frame data was decompressed (used) from the input AVPacket.
+ */
+int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
+ int *frame_size_ptr,
+ AVPacket *avpkt);
+
+#if FF_API_VIDEO_OLD
+/**
+ * Decode a video frame from buf into picture.
+ * Wrapper function which calls avcodec_decode_video2.
+ *
+ * @deprecated Use avcodec_decode_video2 instead.
+ * @param avctx the codec context
+ * @param[out] picture The AVFrame in which the decoded video frame will be stored.
+ * @param[in] buf the input buffer
+ * @param[in] buf_size the size of the input buffer in bytes
+ * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
+ * @return On error a negative value is returned, otherwise the number of bytes
+ * used or zero if no frame could be decompressed.
+ */
+attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
+ int *got_picture_ptr,
+ const uint8_t *buf, int buf_size);
+#endif
+
+/**
+ * Decode the video frame of size avpkt->size from avpkt->data into picture.
+ * Some decoders may support multiple frames in a single AVPacket, such
+ * decoders would then just decode the first frame.
+ *
+ * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
+ * the actual read bytes because some optimized bitstream readers read 32 or 64
+ * bits at once and could read over the end.
+ *
+ * @warning The end of the input buffer buf should be set to 0 to ensure that
+ * no overreading happens for damaged MPEG streams.
+ *
+ * @note You might have to align the input buffer avpkt->data.
+ * The alignment requirements depend on the CPU: on some CPUs it isn't
+ * necessary at all, on others it won't work at all if not aligned and on others
+ * it will work but it will have an impact on performance.
+ *
+ * In practice, avpkt->data should have 4 byte alignment at minimum.
+ *
+ * @note Some codecs have a delay between input and output, these need to be
+ * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
+ *
+ * @param avctx the codec context
+ * @param[out] picture The AVFrame in which the decoded video frame will be stored.
+ * Use avcodec_alloc_frame to get an AVFrame, the codec will
+ * allocate memory for the actual bitmap.
+ * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
+ * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
+ * decodes and the decoder tells the user once it does not need the data anymore,
+ * the user app can at this point free/reuse/keep the memory as it sees fit.
+ *
+ * @param[in] avpkt The input AVpacket containing the input buffer.
+ * You can create such packet with av_init_packet() and by then setting
+ * data and size, some decoders might in addition need other fields like
+ * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
+ * fields possible.
+ * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
+ * @return On error a negative value is returned, otherwise the number of bytes
+ * used or zero if no frame could be decompressed.
+ */
+int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
+ int *got_picture_ptr,
+ AVPacket *avpkt);
+
+#if FF_API_SUBTITLE_OLD
+/* Decode a subtitle message. Return -1 if error, otherwise return the
+ * number of bytes used. If no subtitle could be decompressed,
+ * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
+attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
+ int *got_sub_ptr,
+ const uint8_t *buf, int buf_size);
+#endif
+
+/**
+ * Decode a subtitle message.
+ * Return a negative value on error, otherwise return the number of bytes used.
+ * If no subtitle could be decompressed, got_sub_ptr is zero.
+ * Otherwise, the subtitle is stored in *sub.
+ * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
+ * simplicity, because the performance difference is expect to be negligible
+ * and reusing a get_buffer written for video codecs would probably perform badly
+ * due to a potentially very different allocation pattern.
+ *
+ * @param avctx the codec context
+ * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
+ freed with avsubtitle_free if *got_sub_ptr is set.
+ * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
+ * @param[in] avpkt The input AVPacket containing the input buffer.
+ */
+int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
+ int *got_sub_ptr,
+ AVPacket *avpkt);
+
+/**
+ * Frees all allocated data in the given subtitle struct.
+ *
+ * @param sub AVSubtitle to free.
+ */
+void avsubtitle_free(AVSubtitle *sub);
+
+int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
+ int *data_size_ptr,
+ uint8_t *buf, int buf_size);
+
+/**
+ * Encode an audio frame from samples into buf.
+ *
+ * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
+ * However, for PCM audio the user will know how much space is needed
+ * because it depends on the value passed in buf_size as described
+ * below. In that case a lower value can be used.
+ *
+ * @param avctx the codec context
+ * @param[out] buf the output buffer
+ * @param[in] buf_size the output buffer size
+ * @param[in] samples the input buffer containing the samples
+ * The number of samples read from this buffer is frame_size*channels,
+ * both of which are defined in avctx.
+ * For PCM audio the number of samples read from samples is equal to
+ * buf_size * input_sample_size / output_sample_size.
+ * @return On error a negative value is returned, on success zero or the number
+ * of bytes used to encode the data read from the input buffer.
+ */
+int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+ const short *samples);
+
+/**
+ * Encode a video frame from pict into buf.
+ * The input picture should be
+ * stored using a specific format, namely avctx.pix_fmt.
+ *
+ * @param avctx the codec context
+ * @param[out] buf the output buffer for the bitstream of encoded frame
+ * @param[in] buf_size the size of the output buffer in bytes
+ * @param[in] pict the input picture to encode
+ * @return On error a negative value is returned, on success zero or the number
+ * of bytes used from the output buffer.
+ */
+int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+ const AVFrame *pict);
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+ const AVSubtitle *sub);
+
+int avcodec_close(AVCodecContext *avctx);
+
+/**
+ * Register all the codecs, parsers and bitstream filters which were enabled at
+ * configuration time. If you do not call this function you can select exactly
+ * which formats you want to support, by using the individual registration
+ * functions.
+ *
+ * @see avcodec_register
+ * @see av_register_codec_parser
+ * @see av_register_bitstream_filter
+ */
+void avcodec_register_all(void);
+
+/**
+ * Flush buffers, should be called when seeking or when switching to a different stream.
+ */
+void avcodec_flush_buffers(AVCodecContext *avctx);
+
+void avcodec_default_free_buffers(AVCodecContext *s);
+
+/* misc useful functions */
+
+/**
+ * Return a single letter to describe the given picture type pict_type.
+ *
+ * @param[in] pict_type the picture type
+ * @return A single character representing the picture type.
+ */
+char av_get_pict_type_char(int pict_type);
+
+/**
+ * Return codec bits per sample.
+ *
+ * @param[in] codec_id the codec
+ * @return Number of bits per sample or zero if unknown for the given codec.
+ */
+int av_get_bits_per_sample(enum CodecID codec_id);
+
+#if FF_API_OLD_SAMPLE_FMT
+/**
+ * @deprecated Use av_get_bits_per_sample_fmt() instead.
+ */
+attribute_deprecated
+int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
+#endif
+
+/* frame parsing */
+typedef struct AVCodecParserContext {
+ void *priv_data;
+ struct AVCodecParser *parser;
+ int64_t frame_offset; /* offset of the current frame */
+ int64_t cur_offset; /* current offset
+ (incremented by each av_parser_parse()) */
+ int64_t next_frame_offset; /* offset of the next frame */
+ /* video info */
+ int pict_type; /* XXX: Put it back in AVCodecContext. */
+ /**
+ * This field is used for proper frame duration computation in lavf.
+ * It signals, how much longer the frame duration of the current frame
+ * is compared to normal frame duration.
+ *
+ * frame_duration = (1 + repeat_pict) * time_base
+ *
+ * It is used by codecs like H.264 to display telecined material.
+ */
+ int repeat_pict; /* XXX: Put it back in AVCodecContext. */
+ int64_t pts; /* pts of the current frame */
+ int64_t dts; /* dts of the current frame */
+
+ /* private data */
+ int64_t last_pts;
+ int64_t last_dts;
+ int fetch_timestamp;
+
+#define AV_PARSER_PTS_NB 4
+ int cur_frame_start_index;
+ int64_t cur_frame_offset[AV_PARSER_PTS_NB];
+ int64_t cur_frame_pts[AV_PARSER_PTS_NB];
+ int64_t cur_frame_dts[AV_PARSER_PTS_NB];
+
+ int flags;
+#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
+#define PARSER_FLAG_ONCE 0x0002
+/// Set if the parser has a valid file offset
+#define PARSER_FLAG_FETCHED_OFFSET 0x0004
+
+ int64_t offset; ///< byte offset from starting packet start
+ int64_t cur_frame_end[AV_PARSER_PTS_NB];
+
+ /*!
+ * Set by parser to 1 for key frames and 0 for non-key frames.
+ * It is initialized to -1, so if the parser doesn't set this flag,
+ * old-style fallback using FF_I_TYPE picture type as key frames
+ * will be used.
+ */
+ int key_frame;
+
+ /**
+ * Time difference in stream time base units from the pts of this
+ * packet to the point at which the output from the decoder has converged
+ * independent from the availability of previous frames. That is, the
+ * frames are virtually identical no matter if decoding started from
+ * the very first frame or from this keyframe.
+ * Is AV_NOPTS_VALUE if unknown.
+ * This field is not the display duration of the current frame.
+ * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
+ * set.
+ *
+ * The purpose of this field is to allow seeking in streams that have no
+ * keyframes in the conventional sense. It corresponds to the
+ * recovery point SEI in H.264 and match_time_delta in NUT. It is also
+ * essential for some types of subtitle streams to ensure that all
+ * subtitles are correctly displayed after seeking.
+ */
+ int64_t convergence_duration;
+
+ // Timestamp generation support:
+ /**
+ * Synchronization point for start of timestamp generation.
+ *
+ * Set to >0 for sync point, 0 for no sync point and <0 for undefined
+ * (default).
+ *
+ * For example, this corresponds to presence of H.264 buffering period
+ * SEI message.
+ */
+ int dts_sync_point;
+
+ /**
+ * Offset of the current timestamp against last timestamp sync point in
+ * units of AVCodecContext.time_base.
+ *
+ * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
+ * contain a valid timestamp offset.
+ *
+ * Note that the timestamp of sync point has usually a nonzero
+ * dts_ref_dts_delta, which refers to the previous sync point. Offset of
+ * the next frame after timestamp sync point will be usually 1.
+ *
+ * For example, this corresponds to H.264 cpb_removal_delay.
+ */
+ int dts_ref_dts_delta;
+
+ /**
+ * Presentation delay of current frame in units of AVCodecContext.time_base.
+ *
+ * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
+ * contain valid non-negative timestamp delta (presentation time of a frame
+ * must not lie in the past).
+ *
+ * This delay represents the difference between decoding and presentation
+ * time of the frame.
+ *
+ * For example, this corresponds to H.264 dpb_output_delay.
+ */
+ int pts_dts_delta;
+
+ /**
+ * Position of the packet in file.
+ *
+ * Analogous to cur_frame_pts/dts
+ */
+ int64_t cur_frame_pos[AV_PARSER_PTS_NB];
+
+ /**
+ * Byte position of currently parsed frame in stream.
+ */
+ int64_t pos;
+
+ /**
+ * Previous frame byte position.
+ */
+ int64_t last_pos;
+} AVCodecParserContext;
+
+typedef struct AVCodecParser {
+ int codec_ids[5]; /* several codec IDs are permitted */
+ int priv_data_size;
+ int (*parser_init)(AVCodecParserContext *s);
+ int (*parser_parse)(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ const uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size);
+ void (*parser_close)(AVCodecParserContext *s);
+ int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
+ struct AVCodecParser *next;
+} AVCodecParser;
+
+AVCodecParser *av_parser_next(AVCodecParser *c);
+
+void av_register_codec_parser(AVCodecParser *parser);
+AVCodecParserContext *av_parser_init(int codec_id);
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+attribute_deprecated
+int av_parser_parse(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size,
+ int64_t pts, int64_t dts);
+#endif
+
+/**
+ * Parse a packet.
+ *
+ * @param s parser context.
+ * @param avctx codec context.
+ * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
+ * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
+ * @param buf input buffer.
+ * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
+ * @param pts input presentation timestamp.
+ * @param dts input decoding timestamp.
+ * @param pos input byte position in stream.
+ * @return the number of bytes of the input bitstream used.
+ *
+ * Example:
+ * @code
+ * while(in_len){
+ * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
+ * in_data, in_len,
+ * pts, dts, pos);
+ * in_data += len;
+ * in_len -= len;
+ *
+ * if(size)
+ * decode_frame(data, size);
+ * }
+ * @endcode
+ */
+int av_parser_parse2(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size,
+ int64_t pts, int64_t dts,
+ int64_t pos);
+
+int av_parser_change(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size, int keyframe);
+void av_parser_close(AVCodecParserContext *s);
+
+
+typedef struct AVBitStreamFilterContext {
+ void *priv_data;
+ struct AVBitStreamFilter *filter;
+ AVCodecParserContext *parser;
+ struct AVBitStreamFilterContext *next;
+} AVBitStreamFilterContext;
+
+
+typedef struct AVBitStreamFilter {
+ const char *name;
+ int priv_data_size;
+ int (*filter)(AVBitStreamFilterContext *bsfc,
+ AVCodecContext *avctx, const char *args,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size, int keyframe);
+ void (*close)(AVBitStreamFilterContext *bsfc);
+ struct AVBitStreamFilter *next;
+} AVBitStreamFilter;
+
+void av_register_bitstream_filter(AVBitStreamFilter *bsf);
+AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
+int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
+ AVCodecContext *avctx, const char *args,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size, int keyframe);
+void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
+
+AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
+
+/* memory */
+
+/**
+ * Reallocate the given block if it is not large enough, otherwise do nothing.
+ *
+ * @see av_realloc
+ */
+void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
+
+/**
+ * Allocate a buffer, reusing the given one if large enough.
+ *
+ * Contrary to av_fast_realloc the current buffer contents might not be
+ * preserved and on error the old buffer is freed, thus no special
+ * handling to avoid memleaks is necessary.
+ *
+ * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
+ * @param size size of the buffer *ptr points to
+ * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
+ * *size 0 if an error occurred.
+ */
+void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+/**
+ * @deprecated Deprecated in favor of av_image_copy().
+ */
+attribute_deprecated
+void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
+ uint8_t *src_data[4], int src_linesize[4],
+ enum PixelFormat pix_fmt, int width, int height);
+#endif
+
+/**
+ * Copy image src to dst. Wraps av_picture_data_copy() above.
+ */
+void av_picture_copy(AVPicture *dst, const AVPicture *src,
+ enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ * Crop image top and left side.
+ */
+int av_picture_crop(AVPicture *dst, const AVPicture *src,
+ enum PixelFormat pix_fmt, int top_band, int left_band);
+
+/**
+ * Pad image.
+ */
+int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
+ int padtop, int padbottom, int padleft, int padright, int *color);
+
+/**
+ * Encode extradata length to a buffer. Used by xiph codecs.
+ *
+ * @param s buffer to write to; must be at least (v/255+1) bytes long
+ * @param v size of extradata in bytes
+ * @return number of bytes written to the buffer.
+ */
+unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+/**
+ * Parse str and put in width_ptr and height_ptr the detected values.
+ *
+ * @deprecated Deprecated in favor of av_parse_video_size().
+ */
+attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
+
+/**
+ * Parse str and store the detected values in *frame_rate.
+ *
+ * @deprecated Deprecated in favor of av_parse_video_rate().
+ */
+attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
+#endif
+
+/**
+ * Logs a generic warning message about a missing feature. This function is
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
+ * only, and would normally not be used by applications.
+ * @param[in] avc a pointer to an arbitrary struct of which the first field is
+ * a pointer to an AVClass struct
+ * @param[in] feature string containing the name of the missing feature
+ * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
+ * If want_sample is non-zero, additional verbage will be added to the log
+ * message which tells the user how to report samples to the development
+ * mailing list.
+ */
+void av_log_missing_feature(void *avc, const char *feature, int want_sample);
+
+/**
+ * Log a generic warning message asking for a sample. This function is
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
+ * only, and would normally not be used by applications.
+ * @param[in] avc a pointer to an arbitrary struct of which the first field is
+ * a pointer to an AVClass struct
+ * @param[in] msg string containing an optional message, or NULL if no message
+ */
+void av_log_ask_for_sample(void *avc, const char *msg);
+
+/**
+ * Register the hardware accelerator hwaccel.
+ */
+void av_register_hwaccel(AVHWAccel *hwaccel);
+
+/**
+ * If hwaccel is NULL, returns the first registered hardware accelerator,
+ * if hwaccel is non-NULL, returns the next registered hardware accelerator
+ * after hwaccel, or NULL if hwaccel is the last one.
+ */
+AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
+
+
+/**
+ * Lock operation used by lockmgr
+ */
+enum AVLockOp {
+ AV_LOCK_CREATE, ///< Create a mutex
+ AV_LOCK_OBTAIN, ///< Lock the mutex
+ AV_LOCK_RELEASE, ///< Unlock the mutex
+ AV_LOCK_DESTROY, ///< Free mutex resources
+};
+
+/**
+ * Register a user provided lock manager supporting the operations
+ * specified by AVLockOp. mutex points to a (void *) where the
+ * lockmgr should store/get a pointer to a user allocated mutex. It's
+ * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
+ *
+ * @param cb User defined callback. Note: FFmpeg may invoke calls to this
+ * callback during the call to av_lockmgr_register().
+ * Thus, the application must be prepared to handle that.
+ * If cb is set to NULL the lockmgr will be unregistered.
+ * Also note that during unregistration the previously registered
+ * lockmgr callback may also be invoked.
+ */
+int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
+
+#endif /* AVCODEC_AVCODEC_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AVFFT_H
+#define AVCODEC_AVFFT_H
+
+typedef float FFTSample;
+
+typedef struct FFTComplex {
+ FFTSample re, im;
+} FFTComplex;
+
+typedef struct FFTContext FFTContext;
+
+/**
+ * Set up a complex FFT.
+ * @param nbits log2 of the length of the input array
+ * @param inverse if 0 perform the forward transform, if 1 perform the inverse
+ */
+FFTContext *av_fft_init(int nbits, int inverse);
+
+/**
+ * Do the permutation needed BEFORE calling ff_fft_calc().
+ */
+void av_fft_permute(FFTContext *s, FFTComplex *z);
+
+/**
+ * Do a complex FFT with the parameters defined in av_fft_init(). The
+ * input data must be permuted before. No 1.0/sqrt(n) normalization is done.
+ */
+void av_fft_calc(FFTContext *s, FFTComplex *z);
+
+void av_fft_end(FFTContext *s);
+
+FFTContext *av_mdct_init(int nbits, int inverse, double scale);
+void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input);
+void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input);
+void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input);
+void av_mdct_end(FFTContext *s);
+
+/* Real Discrete Fourier Transform */
+
+enum RDFTransformType {
+ DFT_R2C,
+ IDFT_C2R,
+ IDFT_R2C,
+ DFT_C2R,
+};
+
+typedef struct RDFTContext RDFTContext;
+
+/**
+ * Set up a real FFT.
+ * @param nbits log2 of the length of the input array
+ * @param trans the type of transform
+ */
+RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans);
+void av_rdft_calc(RDFTContext *s, FFTSample *data);
+void av_rdft_end(RDFTContext *s);
+
+/* Discrete Cosine Transform */
+
+typedef struct DCTContext DCTContext;
+
+enum DCTTransformType {
+ DCT_II = 0,
+ DCT_III,
+ DCT_I,
+ DST_I,
+};
+
+/**
+ * Set up DCT.
+ * @param nbits size of the input array:
+ * (1 << nbits) for DCT-II, DCT-III and DST-I
+ * (1 << nbits) + 1 for DCT-I
+ *
+ * @note the first element of the input of DST-I is ignored
+ */
+DCTContext *av_dct_init(int nbits, enum DCTTransformType type);
+void av_dct_calc(DCTContext *s, FFTSample *data);
+void av_dct_end (DCTContext *s);
+
+#endif /* AVCODEC_AVFFT_H */
--- /dev/null
+/*
+ * DXVA2 HW acceleration
+ *
+ * copyright (c) 2009 Laurent Aimar
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_DXVA_H
+#define AVCODEC_DXVA_H
+
+#include <stdint.h>
+
+#include <dxva2api.h>
+
+/**
+ * This structure is used to provides the necessary configurations and data
+ * to the DXVA2 FFmpeg HWAccel implementation.
+ *
+ * The application must make it available as AVCodecContext.hwaccel_context.
+ */
+struct dxva_context {
+ /**
+ * DXVA2 decoder object
+ */
+ IDirectXVideoDecoder *decoder;
+
+ /**
+ * DXVA2 configuration used to create the decoder
+ */
+ const DXVA2_ConfigPictureDecode *cfg;
+
+ /**
+ * The number of surface in the surface array
+ */
+ unsigned surface_count;
+
+ /**
+ * The array of Direct3D surfaces used to create the decoder
+ */
+ LPDIRECT3DSURFACE9 *surface;
+
+ /**
+ * A bit field configuring the workarounds needed for using the decoder
+ */
+ uint64_t workaround;
+
+ /**
+ * Private to the FFmpeg AVHWAccel implementation
+ */
+ unsigned report_id;
+};
+
+#endif /* AVCODEC_DXVA_H */
--- /dev/null
+/*
+ * AVOptions
+ * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_OPT_H
+#define AVCODEC_OPT_H
+
+/**
+ * @file
+ * AVOptions
+ */
+
+#include "libavutil/rational.h"
+#include "avcodec.h"
+#include "libavutil/opt.h"
+
+#if FF_API_SET_STRING_OLD
+/**
+ * @see av_set_string2()
+ */
+attribute_deprecated const AVOption *av_set_string(void *obj, const char *name, const char *val);
+
+/**
+ * @return a pointer to the AVOption corresponding to the field set or
+ * NULL if no matching AVOption exists, or if the value val is not
+ * valid
+ * @see av_set_string3()
+ */
+attribute_deprecated const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc);
+#endif
+#if FF_API_OPT_SHOW
+/**
+ * @deprecated Use av_opt_show2() instead.
+ */
+attribute_deprecated int av_opt_show(void *obj, void *av_log_obj);
+#endif
+
+#endif /* AVCODEC_OPT_H */
--- /dev/null
+/*
+ * Video Acceleration API (shared data between FFmpeg and the video player)
+ * HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1
+ *
+ * Copyright (C) 2008-2009 Splitted-Desktop Systems
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VAAPI_H
+#define AVCODEC_VAAPI_H
+
+#include <stdint.h>
+
+/**
+ * \defgroup VAAPI_Decoding VA API Decoding
+ * \ingroup Decoder
+ * @{
+ */
+
+/**
+ * This structure is used to share data between the FFmpeg library and
+ * the client video application.
+ * This shall be zero-allocated and available as
+ * AVCodecContext.hwaccel_context. All user members can be set once
+ * during initialization or through each AVCodecContext.get_buffer()
+ * function call. In any case, they must be valid prior to calling
+ * decoding functions.
+ */
+struct vaapi_context {
+ /**
+ * Window system dependent data
+ *
+ * - encoding: unused
+ * - decoding: Set by user
+ */
+ void *display;
+
+ /**
+ * Configuration ID
+ *
+ * - encoding: unused
+ * - decoding: Set by user
+ */
+ uint32_t config_id;
+
+ /**
+ * Context ID (video decode pipeline)
+ *
+ * - encoding: unused
+ * - decoding: Set by user
+ */
+ uint32_t context_id;
+
+ /**
+ * VAPictureParameterBuffer ID
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ uint32_t pic_param_buf_id;
+
+ /**
+ * VAIQMatrixBuffer ID
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ uint32_t iq_matrix_buf_id;
+
+ /**
+ * VABitPlaneBuffer ID (for VC-1 decoding)
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ uint32_t bitplane_buf_id;
+
+ /**
+ * Slice parameter/data buffer IDs
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ uint32_t *slice_buf_ids;
+
+ /**
+ * Number of effective slice buffer IDs to send to the HW
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ unsigned int n_slice_buf_ids;
+
+ /**
+ * Size of pre-allocated slice_buf_ids
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ unsigned int slice_buf_ids_alloc;
+
+ /**
+ * Pointer to VASliceParameterBuffers
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ void *slice_params;
+
+ /**
+ * Size of a VASliceParameterBuffer element
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ unsigned int slice_param_size;
+
+ /**
+ * Size of pre-allocated slice_params
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ unsigned int slice_params_alloc;
+
+ /**
+ * Number of slices currently filled in
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ unsigned int slice_count;
+
+ /**
+ * Pointer to slice data buffer base
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ const uint8_t *slice_data;
+
+ /**
+ * Current size of slice data
+ *
+ * - encoding: unused
+ * - decoding: Set by libavcodec
+ */
+ uint32_t slice_data_size;
+};
+
+/* @} */
+
+#endif /* AVCODEC_VAAPI_H */
--- /dev/null
+/*
+ * The Video Decode and Presentation API for UNIX (VDPAU) is used for
+ * hardware-accelerated decoding of MPEG-1/2, H.264 and VC-1.
+ *
+ * Copyright (C) 2008 NVIDIA
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VDPAU_H
+#define AVCODEC_VDPAU_H
+
+/**
+ * \defgroup Decoder VDPAU Decoder and Renderer
+ *
+ * VDPAU hardware acceleration has two modules
+ * - VDPAU decoding
+ * - VDPAU presentation
+ *
+ * The VDPAU decoding module parses all headers using FFmpeg
+ * parsing mechanisms and uses VDPAU for the actual decoding.
+ *
+ * As per the current implementation, the actual decoding
+ * and rendering (API calls) are done as part of the VDPAU
+ * presentation (vo_vdpau.c) module.
+ *
+ * \defgroup VDPAU_Decoding VDPAU Decoding
+ * \ingroup Decoder
+ * @{
+ */
+
+#include <vdpau/vdpau.h>
+#include <vdpau/vdpau_x11.h>
+
+/** \brief The videoSurface is used for rendering. */
+#define FF_VDPAU_STATE_USED_FOR_RENDER 1
+
+/**
+ * \brief The videoSurface is needed for reference/prediction.
+ * The codec manipulates this.
+ */
+#define FF_VDPAU_STATE_USED_FOR_REFERENCE 2
+
+/**
+ * \brief This structure is used as a callback between the FFmpeg
+ * decoder (vd_) and presentation (vo_) module.
+ * This is used for defining a video frame containing surface,
+ * picture parameter, bitstream information etc which are passed
+ * between the FFmpeg decoder and its clients.
+ */
+struct vdpau_render_state {
+ VdpVideoSurface surface; ///< Used as rendered surface, never changed.
+
+ int state; ///< Holds FF_VDPAU_STATE_* values.
+
+ /** picture parameter information for all supported codecs */
+ union VdpPictureInfo {
+ VdpPictureInfoH264 h264;
+ VdpPictureInfoMPEG1Or2 mpeg;
+ VdpPictureInfoVC1 vc1;
+ VdpPictureInfoMPEG4Part2 mpeg4;
+ } info;
+
+ /** Describe size/location of the compressed video data.
+ Set to 0 when freeing bitstream_buffers. */
+ int bitstream_buffers_allocated;
+ int bitstream_buffers_used;
+ /** The user is responsible for freeing this buffer using av_freep(). */
+ VdpBitstreamBuffer *bitstream_buffers;
+};
+
+/* @}*/
+
+#endif /* AVCODEC_VDPAU_H */
--- /dev/null
+/*
+ * Copyright (C) 2003 Ivan Kalvachev
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_XVMC_H
+#define AVCODEC_XVMC_H
+
+#include <X11/extensions/XvMC.h>
+
+#include "avcodec.h"
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+#define AV_XVMC_STATE_DISPLAY_PENDING 1 /** the surface should be shown, the video driver manipulates this */
+#define AV_XVMC_STATE_PREDICTION 2 /** the surface is needed for prediction, the codec manipulates this */
+#define AV_XVMC_STATE_OSD_SOURCE 4 /** the surface is needed for subpicture rendering */
+#endif
+#define AV_XVMC_ID 0x1DC711C0 /**< special value to ensure that regular pixel routines haven't corrupted the struct
+ the number is 1337 speak for the letters IDCT MCo (motion compensation) */
+
+struct xvmc_pix_fmt {
+ /** The field contains the special constant value AV_XVMC_ID.
+ It is used as a test that the application correctly uses the API,
+ and that there is no corruption caused by pixel routines.
+ - application - set during initialization
+ - libavcodec - unchanged
+ */
+ int xvmc_id;
+
+ /** Pointer to the block array allocated by XvMCCreateBlocks().
+ The array has to be freed by XvMCDestroyBlocks().
+ Each group of 64 values represents one data block of differential
+ pixel information (in MoCo mode) or coefficients for IDCT.
+ - application - set the pointer during initialization
+ - libavcodec - fills coefficients/pixel data into the array
+ */
+ short* data_blocks;
+
+ /** Pointer to the macroblock description array allocated by
+ XvMCCreateMacroBlocks() and freed by XvMCDestroyMacroBlocks().
+ - application - set the pointer during initialization
+ - libavcodec - fills description data into the array
+ */
+ XvMCMacroBlock* mv_blocks;
+
+ /** Number of macroblock descriptions that can be stored in the mv_blocks
+ array.
+ - application - set during initialization
+ - libavcodec - unchanged
+ */
+ int allocated_mv_blocks;
+
+ /** Number of blocks that can be stored at once in the data_blocks array.
+ - application - set during initialization
+ - libavcodec - unchanged
+ */
+ int allocated_data_blocks;
+
+ /** Indicate that the hardware would interpret data_blocks as IDCT
+ coefficients and perform IDCT on them.
+ - application - set during initialization
+ - libavcodec - unchanged
+ */
+ int idct;
+
+ /** In MoCo mode it indicates that intra macroblocks are assumed to be in
+ unsigned format; same as the XVMC_INTRA_UNSIGNED flag.
+ - application - set during initialization
+ - libavcodec - unchanged
+ */
+ int unsigned_intra;
+
+ /** Pointer to the surface allocated by XvMCCreateSurface().
+ It has to be freed by XvMCDestroySurface() on application exit.
+ It identifies the frame and its state on the video hardware.
+ - application - set during initialization
+ - libavcodec - unchanged
+ */
+ XvMCSurface* p_surface;
+
+/** Set by the decoder before calling ff_draw_horiz_band(),
+ needed by the XvMCRenderSurface function. */
+//@{
+ /** Pointer to the surface used as past reference
+ - application - unchanged
+ - libavcodec - set
+ */
+ XvMCSurface* p_past_surface;
+
+ /** Pointer to the surface used as future reference
+ - application - unchanged
+ - libavcodec - set
+ */
+ XvMCSurface* p_future_surface;
+
+ /** top/bottom field or frame
+ - application - unchanged
+ - libavcodec - set
+ */
+ unsigned int picture_structure;
+
+ /** XVMC_SECOND_FIELD - 1st or 2nd field in the sequence
+ - application - unchanged
+ - libavcodec - set
+ */
+ unsigned int flags;
+//}@
+
+ /** Number of macroblock descriptions in the mv_blocks array
+ that have already been passed to the hardware.
+ - application - zeroes it on get_buffer().
+ A successful ff_draw_horiz_band() may increment it
+ with filled_mb_block_num or zero both.
+ - libavcodec - unchanged
+ */
+ int start_mv_blocks_num;
+
+ /** Number of new macroblock descriptions in the mv_blocks array (after
+ start_mv_blocks_num) that are filled by libavcodec and have to be
+ passed to the hardware.
+ - application - zeroes it on get_buffer() or after successful
+ ff_draw_horiz_band().
+ - libavcodec - increment with one of each stored MB
+ */
+ int filled_mv_blocks_num;
+
+ /** Number of the the next free data block; one data block consists of
+ 64 short values in the data_blocks array.
+ All blocks before this one have already been claimed by placing their
+ position into the corresponding block description structure field,
+ that are part of the mv_blocks array.
+ - application - zeroes it on get_buffer().
+ A successful ff_draw_horiz_band() may zero it together
+ with start_mb_blocks_num.
+ - libavcodec - each decoded macroblock increases it by the number
+ of coded blocks it contains.
+ */
+ int next_free_data_block_num;
+
+/** extensions may be placed here */
+#if LIBAVCODEC_VERSION_MAJOR < 53
+//@{
+ /** State flags used to work around limitations in the MPlayer video system.
+ 0 - Surface is not used.
+ 1 - Surface is still held in application to be displayed or is
+ still visible.
+ 2 - Surface is still held in libavcodec buffer for prediction.
+ */
+ int state;
+
+ /** pointer to the surface where the subpicture is rendered */
+ void* p_osd_target_surface_render;
+//}@
+#endif
+};
+
+#endif /* AVCODEC_XVMC_H */
--- /dev/null
+/*
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2008 Peter Ross
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCORE_AUDIOCONVERT_H
+#define AVCORE_AUDIOCONVERT_H
+
+/**
+ * @file
+ * audio conversion routines
+ */
+
+#include "avcore.h"
+
+/* Audio channel masks */
+#define AV_CH_FRONT_LEFT 0x00000001
+#define AV_CH_FRONT_RIGHT 0x00000002
+#define AV_CH_FRONT_CENTER 0x00000004
+#define AV_CH_LOW_FREQUENCY 0x00000008
+#define AV_CH_BACK_LEFT 0x00000010
+#define AV_CH_BACK_RIGHT 0x00000020
+#define AV_CH_FRONT_LEFT_OF_CENTER 0x00000040
+#define AV_CH_FRONT_RIGHT_OF_CENTER 0x00000080
+#define AV_CH_BACK_CENTER 0x00000100
+#define AV_CH_SIDE_LEFT 0x00000200
+#define AV_CH_SIDE_RIGHT 0x00000400
+#define AV_CH_TOP_CENTER 0x00000800
+#define AV_CH_TOP_FRONT_LEFT 0x00001000
+#define AV_CH_TOP_FRONT_CENTER 0x00002000
+#define AV_CH_TOP_FRONT_RIGHT 0x00004000
+#define AV_CH_TOP_BACK_LEFT 0x00008000
+#define AV_CH_TOP_BACK_CENTER 0x00010000
+#define AV_CH_TOP_BACK_RIGHT 0x00020000
+#define AV_CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
+#define AV_CH_STEREO_RIGHT 0x40000000 ///< See AV_CH_STEREO_LEFT.
+
+/** Channel mask value used for AVCodecContext.request_channel_layout
+ to indicate that the user requests the channel order of the decoder output
+ to be the native codec channel order. */
+#define AV_CH_LAYOUT_NATIVE 0x8000000000000000LL
+
+/* Audio channel convenience macros */
+#define AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
+#define AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_2_2 (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_QUAD (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_5POINT0_BACK (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1_BACK (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_7POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1_WIDE (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
+
+/**
+ * Return a channel layout id that matches name, 0 if no match.
+ */
+int64_t av_get_channel_layout(const char *name);
+
+/**
+ * Return a description of a channel layout.
+ * If nb_channels is <= 0, it is guessed from the channel_layout.
+ *
+ * @param buf put here the string containing the channel layout
+ * @param buf_size size in bytes of the buffer
+ */
+void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout);
+
+/**
+ * Return the number of channels in the channel layout.
+ */
+int av_get_channel_layout_nb_channels(int64_t channel_layout);
+
+#endif /* AVCORE_AUDIOCONVERT_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCORE_AVCORE_H
+#define AVCORE_AVCORE_H
+
+/**
+ * @file
+ * shared media utilities for the libav* libraries
+ */
+
+#include "libavutil/avutil.h"
+
+#define LIBAVCORE_VERSION_MAJOR 0
+#define LIBAVCORE_VERSION_MINOR 16
+#define LIBAVCORE_VERSION_MICRO 1
+
+#define LIBAVCORE_VERSION_INT AV_VERSION_INT(LIBAVCORE_VERSION_MAJOR, \
+ LIBAVCORE_VERSION_MINOR, \
+ LIBAVCORE_VERSION_MICRO)
+#define LIBAVCORE_VERSION AV_VERSION(LIBAVCORE_VERSION_MAJOR, \
+ LIBAVCORE_VERSION_MINOR, \
+ LIBAVCORE_VERSION_MICRO)
+#define LIBAVCORE_BUILD LIBAVCORE_VERSION_INT
+
+#define LIBAVCORE_IDENT "Lavcore" AV_STRINGIFY(LIBAVCORE_VERSION)
+
+/**
+ * Return the LIBAVCORE_VERSION_INT constant.
+ */
+unsigned avcore_version(void);
+
+/**
+ * Return the libavcore build-time configuration.
+ */
+const char *avcore_configuration(void);
+
+/**
+ * Return the libavcore license.
+ */
+const char *avcore_license(void);
+
+#define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
+#define AV_TIME_BASE 1000000
+#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
+
+/**
+ * Those FF_API_* defines are not part of public API.
+ * They may change, break or disappear at any time.
+ */
+#ifndef FF_API_OLD_IMAGE_NAMES
+#define FF_API_OLD_IMAGE_NAMES (LIBAVCORE_VERSION_MAJOR < 1)
+#endif
+
+#endif /* AVCORE_AVCORE_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCORE_IMGUTILS_H
+#define AVCORE_IMGUTILS_H
+
+/**
+ * @file
+ * misc image utilities
+ */
+
+#include "libavutil/pixdesc.h"
+#include "avcore.h"
+
+/**
+ * Compute the max pixel step for each plane of an image with a
+ * format described by pixdesc.
+ *
+ * The pixel step is the distance in bytes between the first byte of
+ * the group of bytes which describe a pixel component and the first
+ * byte of the successive group in the same plane for the same
+ * component.
+ *
+ * @param max_pixsteps an array which is filled with the max pixel step
+ * for each plane. Since a plane may contain different pixel
+ * components, the computed max_pixsteps[plane] is relative to the
+ * component in the plane with the max pixel step.
+ * @param max_pixstep_comps an array which is filled with the component
+ * for each plane which has the max pixel step. May be NULL.
+ */
+void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
+ const AVPixFmtDescriptor *pixdesc);
+
+/**
+ * Compute the size of an image line with format pix_fmt and width
+ * width for the plane plane.
+ *
+ * @return the computed size in bytes
+ */
+int av_image_get_linesize(enum PixelFormat pix_fmt, int width, int plane);
+
+/**
+ * Fill plane linesizes for an image with pixel format pix_fmt and
+ * width width.
+ *
+ * @param linesizes array to be filled with the linesize for each plane
+ * @return >= 0 in case of success, a negative error code otherwise
+ */
+int av_image_fill_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width);
+
+/**
+ * Fill plane data pointers for an image with pixel format pix_fmt and
+ * height height.
+ *
+ * @param data pointers array to be filled with the pointer for each image plane
+ * @param ptr the pointer to a buffer which will contain the image
+ * @param linesizes[4] the array containing the linesize for each
+ * plane, should be filled by av_image_fill_linesizes()
+ * @return the size in bytes required for the image buffer, a negative
+ * error code in case of failure
+ */
+int av_image_fill_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
+ uint8_t *ptr, const int linesizes[4]);
+
+/**
+ * Allocate an image with size w and h and pixel format pix_fmt, and
+ * fill pointers and linesizes accordingly.
+ * The allocated image buffer has to be freed by using
+ * av_freep(&pointers[0]).
+ *
+ * @param align the value to use for buffer size alignment
+ * @return the size in bytes required for the image buffer, a negative
+ * error code in case of failure
+ */
+int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
+ int w, int h, enum PixelFormat pix_fmt, int align);
+
+/**
+ * Copy image plane from src to dst.
+ * That is, copy "height" number of lines of "bytewidth" bytes each.
+ * The first byte of each successive line is separated by *_linesize
+ * bytes.
+ *
+ * @param dst_linesize linesize for the image plane in dst
+ * @param src_linesize linesize for the image plane in src
+ */
+void av_image_copy_plane(uint8_t *dst, int dst_linesize,
+ const uint8_t *src, int src_linesize,
+ int bytewidth, int height);
+
+/**
+ * Copy image in src_data to dst_data.
+ *
+ * @param dst_linesize linesizes for the image in dst_data
+ * @param src_linesize linesizes for the image in src_data
+ */
+void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
+ const uint8_t *src_data[4], const int src_linesizes[4],
+ enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ * Check if the given dimension of an image is valid, meaning that all
+ * bytes of the image can be addressed with a signed int.
+ *
+ * @param w the width of the picture
+ * @param h the height of the picture
+ * @param log_offset the offset to sum to the log level for logging with log_ctx
+ * @param log_ctx the parent logging context, it may be NULL
+ * @return >= 0 if valid, a negative error code otherwise
+ */
+int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx);
+
+#if FF_API_OLD_IMAGE_NAMES
+attribute_deprecated
+void av_fill_image_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
+ const AVPixFmtDescriptor *pixdesc);
+
+attribute_deprecated
+int av_get_image_linesize(enum PixelFormat pix_fmt, int width, int plane);
+
+attribute_deprecated
+int av_fill_image_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width);
+
+attribute_deprecated
+int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
+ uint8_t *ptr, const int linesizes[4]);
+
+attribute_deprecated
+int av_check_image_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx);
+#endif
+
+#endif /* AVCORE_IMGUTILS_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCORE_PARSEUTILS_H
+#define AVCORE_PARSEUTILS_H
+
+#include "libavutil/rational.h"
+
+/**
+ * @file
+ * misc parsing utilities for libavcore
+ */
+
+/**
+ * Parse str and put in width_ptr and height_ptr the detected values.
+ *
+ * @param[in,out] width_ptr pointer to the variable which will contain the detected
+ * width value
+ * @param[in,out] height_ptr pointer to the variable which will contain the detected
+ * height value
+ * @param[in] str the string to parse: it has to be a string in the format
+ * width x height or a valid video size abbreviation.
+ * @return >= 0 on success, a negative error code otherwise
+ */
+int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str);
+
+/**
+ * Parse str and store the detected values in *rate.
+ *
+ * @param[in,out] rate pointer to the AVRational which will contain the detected
+ * frame rate
+ * @param[in] str the string to parse: it has to be a string in the format
+ * rate_num / rate_den, a float number or a valid video rate abbreviation
+ * @return >= 0 on success, a negative error code otherwise
+ */
+int av_parse_video_rate(AVRational *rate, const char *str);
+
+/**
+ * Put the RGBA values that correspond to color_string in rgba_color.
+ *
+ * @param color_string a string specifying a color. It can be the name of
+ * a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
+ * possibly followed by "@" and a string representing the alpha
+ * component.
+ * The alpha component may be a string composed by "0x" followed by an
+ * hexadecimal number or a decimal number between 0.0 and 1.0, which
+ * represents the opacity value (0x00/0.0 means completely transparent,
+ * 0xff/1.0 completely opaque).
+ * If the alpha component is not specified then 0xff is assumed.
+ * The string "random" will result in a random color.
+ * @param slen length of the initial part of color_string containing the
+ * color. It can be set to -1 if color_string is a null terminated string
+ * containing nothing else than the color.
+ * @return >= 0 in case of success, a negative value in case of
+ * failure (for example if color_string cannot be parsed).
+ */
+int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
+ void *log_ctx);
+
+#endif /* AVCORE_PARSEUTILS_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCORE_SAMPLEFMT_H
+#define AVCORE_SAMPLEFMT_H
+
+#include "avcore.h"
+
+/**
+ * all in native-endian format
+ */
+enum AVSampleFormat {
+ AV_SAMPLE_FMT_NONE = -1,
+ AV_SAMPLE_FMT_U8, ///< unsigned 8 bits
+ AV_SAMPLE_FMT_S16, ///< signed 16 bits
+ AV_SAMPLE_FMT_S32, ///< signed 32 bits
+ AV_SAMPLE_FMT_FLT, ///< float
+ AV_SAMPLE_FMT_DBL, ///< double
+ AV_SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcore
+};
+
+/**
+ * Return the name of sample_fmt, or NULL if sample_fmt is not
+ * recognized.
+ */
+const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt);
+
+/**
+ * Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE
+ * on error.
+ */
+enum AVSampleFormat av_get_sample_fmt(const char *name);
+
+/**
+ * Generate a string corresponding to the sample format with
+ * sample_fmt, or a header if sample_fmt is negative.
+ *
+ * @param buf the buffer where to write the string
+ * @param buf_size the size of buf
+ * @param sample_fmt the number of the sample format to print the
+ * corresponding info string, or a negative value to print the
+ * corresponding header.
+ * @return the pointer to the filled buffer or NULL if sample_fmt is
+ * unknown or in case of other errors
+ */
+char *av_get_sample_fmt_string(char *buf, int buf_size, enum AVSampleFormat sample_fmt);
+
+/**
+ * Return sample format bits per sample.
+ *
+ * @param sample_fmt the sample format
+ * @return number of bits per sample or zero if unknown for the given
+ * sample format
+ */
+int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt);
+
+#endif /* AVCORE_SAMPLEFMT_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVDEVICE_AVDEVICE_H
+#define AVDEVICE_AVDEVICE_H
+
+#include "libavutil/avutil.h"
+
+#define LIBAVDEVICE_VERSION_MAJOR 52
+#define LIBAVDEVICE_VERSION_MINOR 2
+#define LIBAVDEVICE_VERSION_MICRO 3
+
+#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
+ LIBAVDEVICE_VERSION_MINOR, \
+ LIBAVDEVICE_VERSION_MICRO)
+#define LIBAVDEVICE_VERSION AV_VERSION(LIBAVDEVICE_VERSION_MAJOR, \
+ LIBAVDEVICE_VERSION_MINOR, \
+ LIBAVDEVICE_VERSION_MICRO)
+#define LIBAVDEVICE_BUILD LIBAVDEVICE_VERSION_INT
+
+/**
+ * Return the LIBAVDEVICE_VERSION_INT constant.
+ */
+unsigned avdevice_version(void);
+
+/**
+ * Return the libavdevice build-time configuration.
+ */
+const char *avdevice_configuration(void);
+
+/**
+ * Return the libavdevice license.
+ */
+const char *avdevice_license(void);
+
+/**
+ * Initialize libavdevice and register all the input and output devices.
+ * @warning This function is not thread safe.
+ */
+void avdevice_register_all(void);
+
+#endif /* AVDEVICE_AVDEVICE_H */
+
--- /dev/null
+/*
+ * filter layer
+ * Copyright (c) 2007 Bobby Bingham
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFILTER_AVFILTER_H
+#define AVFILTER_AVFILTER_H
+
+#include "libavutil/avutil.h"
+#include "libavcore/avcore.h"
+#include "libavcore/samplefmt.h"
+
+#define LIBAVFILTER_VERSION_MAJOR 1
+#define LIBAVFILTER_VERSION_MINOR 74
+#define LIBAVFILTER_VERSION_MICRO 0
+
+#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
+ LIBAVFILTER_VERSION_MINOR, \
+ LIBAVFILTER_VERSION_MICRO)
+#define LIBAVFILTER_VERSION AV_VERSION(LIBAVFILTER_VERSION_MAJOR, \
+ LIBAVFILTER_VERSION_MINOR, \
+ LIBAVFILTER_VERSION_MICRO)
+#define LIBAVFILTER_BUILD LIBAVFILTER_VERSION_INT
+
+#include <stddef.h>
+
+/**
+ * Return the LIBAVFILTER_VERSION_INT constant.
+ */
+unsigned avfilter_version(void);
+
+/**
+ * Return the libavfilter build-time configuration.
+ */
+const char *avfilter_configuration(void);
+
+/**
+ * Return the libavfilter license.
+ */
+const char *avfilter_license(void);
+
+
+typedef struct AVFilterContext AVFilterContext;
+typedef struct AVFilterLink AVFilterLink;
+typedef struct AVFilterPad AVFilterPad;
+
+/**
+ * A reference-counted buffer data type used by the filter system. Filters
+ * should not store pointers to this structure directly, but instead use the
+ * AVFilterBufferRef structure below.
+ */
+typedef struct AVFilterBuffer {
+ uint8_t *data[8]; ///< buffer data for each plane/channel
+ int linesize[8]; ///< number of bytes per line
+
+ unsigned refcount; ///< number of references to this buffer
+
+ /** private data to be used by a custom free function */
+ void *priv;
+ /**
+ * A pointer to the function to deallocate this buffer if the default
+ * function is not sufficient. This could, for example, add the memory
+ * back into a memory pool to be reused later without the overhead of
+ * reallocating it from scratch.
+ */
+ void (*free)(struct AVFilterBuffer *buf);
+
+ int format; ///< media format
+ int w, h; ///< width and height of the allocated buffer
+} AVFilterBuffer;
+
+#define AV_PERM_READ 0x01 ///< can read from the buffer
+#define AV_PERM_WRITE 0x02 ///< can write to the buffer
+#define AV_PERM_PRESERVE 0x04 ///< nobody else can overwrite the buffer
+#define AV_PERM_REUSE 0x08 ///< can output the buffer multiple times, with the same contents each time
+#define AV_PERM_REUSE2 0x10 ///< can output the buffer multiple times, modified each time
+#define AV_PERM_NEG_LINESIZES 0x20 ///< the buffer requested can have negative linesizes
+
+/**
+ * Audio specific properties in a reference to an AVFilterBuffer. Since
+ * AVFilterBufferRef is common to different media formats, audio specific
+ * per reference properties must be separated out.
+ */
+typedef struct AVFilterBufferRefAudioProps {
+ int64_t channel_layout; ///< channel layout of audio buffer
+ int nb_samples; ///< number of audio samples
+ int size; ///< audio buffer size
+ uint32_t sample_rate; ///< audio buffer sample rate
+ int planar; ///< audio buffer - planar or packed
+} AVFilterBufferRefAudioProps;
+
+/**
+ * Video specific properties in a reference to an AVFilterBuffer. Since
+ * AVFilterBufferRef is common to different media formats, video specific
+ * per reference properties must be separated out.
+ */
+typedef struct AVFilterBufferRefVideoProps {
+ int w; ///< image width
+ int h; ///< image height
+ AVRational pixel_aspect; ///< pixel aspect ratio
+ int interlaced; ///< is frame interlaced
+ int top_field_first; ///< field order
+} AVFilterBufferRefVideoProps;
+
+/**
+ * A reference to an AVFilterBuffer. Since filters can manipulate the origin of
+ * a buffer to, for example, crop image without any memcpy, the buffer origin
+ * and dimensions are per-reference properties. Linesize is also useful for
+ * image flipping, frame to field filters, etc, and so is also per-reference.
+ *
+ * TODO: add anything necessary for frame reordering
+ */
+typedef struct AVFilterBufferRef {
+ AVFilterBuffer *buf; ///< the buffer that this is a reference to
+ uint8_t *data[8]; ///< picture/audio data for each plane
+ int linesize[8]; ///< number of bytes per line
+ int format; ///< media format
+
+ /**
+ * presentation timestamp. The time unit may change during
+ * filtering, as it is specified in the link and the filter code
+ * may need to rescale the PTS accordingly.
+ */
+ int64_t pts;
+ int64_t pos; ///< byte position in stream, -1 if unknown
+
+ int perms; ///< permissions, see the AV_PERM_* flags
+
+ enum AVMediaType type; ///< media type of buffer data
+ AVFilterBufferRefVideoProps *video; ///< video buffer specific properties
+ AVFilterBufferRefAudioProps *audio; ///< audio buffer specific properties
+} AVFilterBufferRef;
+
+/**
+ * Copy properties of src to dst, without copying the actual data
+ */
+static inline void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src)
+{
+ // copy common properties
+ dst->pts = src->pts;
+ dst->pos = src->pos;
+
+ switch (src->type) {
+ case AVMEDIA_TYPE_VIDEO: *dst->video = *src->video; break;
+ case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;
+ }
+}
+
+/**
+ * Add a new reference to a buffer.
+ *
+ * @param ref an existing reference to the buffer
+ * @param pmask a bitmask containing the allowable permissions in the new
+ * reference
+ * @return a new reference to the buffer with the same properties as the
+ * old, excluding any permissions denied by pmask
+ */
+AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask);
+
+/**
+ * Remove a reference to a buffer. If this is the last reference to the
+ * buffer, the buffer itself is also automatically freed.
+ *
+ * @param ref reference to the buffer, may be NULL
+ */
+void avfilter_unref_buffer(AVFilterBufferRef *ref);
+
+/**
+ * A list of supported formats for one end of a filter link. This is used
+ * during the format negotiation process to try to pick the best format to
+ * use to minimize the number of necessary conversions. Each filter gives a
+ * list of the formats supported by each input and output pad. The list
+ * given for each pad need not be distinct - they may be references to the
+ * same list of formats, as is often the case when a filter supports multiple
+ * formats, but will always output the same format as it is given in input.
+ *
+ * In this way, a list of possible input formats and a list of possible
+ * output formats are associated with each link. When a set of formats is
+ * negotiated over a link, the input and output lists are merged to form a
+ * new list containing only the common elements of each list. In the case
+ * that there were no common elements, a format conversion is necessary.
+ * Otherwise, the lists are merged, and all other links which reference
+ * either of the format lists involved in the merge are also affected.
+ *
+ * For example, consider the filter chain:
+ * filter (a) --> (b) filter (b) --> (c) filter
+ *
+ * where the letters in parenthesis indicate a list of formats supported on
+ * the input or output of the link. Suppose the lists are as follows:
+ * (a) = {A, B}
+ * (b) = {A, B, C}
+ * (c) = {B, C}
+ *
+ * First, the first link's lists are merged, yielding:
+ * filter (a) --> (a) filter (a) --> (c) filter
+ *
+ * Notice that format list (b) now refers to the same list as filter list (a).
+ * Next, the lists for the second link are merged, yielding:
+ * filter (a) --> (a) filter (a) --> (a) filter
+ *
+ * where (a) = {B}.
+ *
+ * Unfortunately, when the format lists at the two ends of a link are merged,
+ * we must ensure that all links which reference either pre-merge format list
+ * get updated as well. Therefore, we have the format list structure store a
+ * pointer to each of the pointers to itself.
+ */
+typedef struct AVFilterFormats {
+ unsigned format_count; ///< number of formats
+ int *formats; ///< list of media formats
+
+ unsigned refcount; ///< number of references to this list
+ struct AVFilterFormats ***refs; ///< references to this list
+} AVFilterFormats;;
+
+/**
+ * Create a list of supported formats. This is intended for use in
+ * AVFilter->query_formats().
+ *
+ * @param fmts list of media formats, terminated by -1
+ * @return the format list, with no existing references
+ */
+AVFilterFormats *avfilter_make_format_list(const int *fmts);
+
+/**
+ * Add fmt to the list of media formats contained in *avff.
+ * If *avff is NULL the function allocates the filter formats struct
+ * and puts its pointer in *avff.
+ *
+ * @return a non negative value in case of success, or a negative
+ * value corresponding to an AVERROR code in case of error
+ */
+int avfilter_add_format(AVFilterFormats **avff, int fmt);
+
+/**
+ * Return a list of all formats supported by FFmpeg for the given media type.
+ */
+AVFilterFormats *avfilter_all_formats(enum AVMediaType type);
+
+/**
+ * Return a format list which contains the intersection of the formats of
+ * a and b. Also, all the references of a, all the references of b, and
+ * a and b themselves will be deallocated.
+ *
+ * If a and b do not share any common formats, neither is modified, and NULL
+ * is returned.
+ */
+AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b);
+
+/**
+ * Add *ref as a new reference to formats.
+ * That is the pointers will point like in the ascii art below:
+ * ________
+ * |formats |<--------.
+ * | ____ | ____|___________________
+ * | |refs| | | __|_
+ * | |* * | | | | | | AVFilterLink
+ * | |* *--------->|*ref|
+ * | |____| | | |____|
+ * |________| |________________________
+ */
+void avfilter_formats_ref(AVFilterFormats *formats, AVFilterFormats **ref);
+
+/**
+ * If *ref is non-NULL, remove *ref as a reference to the format list
+ * it currently points to, deallocates that list if this was the last
+ * reference, and sets *ref to NULL.
+ *
+ * Before After
+ * ________ ________ NULL
+ * |formats |<--------. |formats | ^
+ * | ____ | ____|________________ | ____ | ____|________________
+ * | |refs| | | __|_ | |refs| | | __|_
+ * | |* * | | | | | | AVFilterLink | |* * | | | | | | AVFilterLink
+ * | |* *--------->|*ref| | |* | | | |*ref|
+ * | |____| | | |____| | |____| | | |____|
+ * |________| |_____________________ |________| |_____________________
+ */
+void avfilter_formats_unref(AVFilterFormats **ref);
+
+/**
+ *
+ * Before After
+ * ________ ________
+ * |formats |<---------. |formats |<---------.
+ * | ____ | ___|___ | ____ | ___|___
+ * | |refs| | | | | | |refs| | | | | NULL
+ * | |* *--------->|*oldref| | |* *--------->|*newref| ^
+ * | |* * | | |_______| | |* * | | |_______| ___|___
+ * | |____| | | |____| | | | |
+ * |________| |________| |*oldref|
+ * |_______|
+ */
+void avfilter_formats_changeref(AVFilterFormats **oldref,
+ AVFilterFormats **newref);
+
+/**
+ * A filter pad used for either input or output.
+ */
+struct AVFilterPad {
+ /**
+ * Pad name. The name is unique among inputs and among outputs, but an
+ * input may have the same name as an output. This may be NULL if this
+ * pad has no need to ever be referenced by name.
+ */
+ const char *name;
+
+ /**
+ * AVFilterPad type. Only video supported now, hopefully someone will
+ * add audio in the future.
+ */
+ enum AVMediaType type;
+
+ /**
+ * Minimum required permissions on incoming buffers. Any buffer with
+ * insufficient permissions will be automatically copied by the filter
+ * system to a new buffer which provides the needed access permissions.
+ *
+ * Input pads only.
+ */
+ int min_perms;
+
+ /**
+ * Permissions which are not accepted on incoming buffers. Any buffer
+ * which has any of these permissions set will be automatically copied
+ * by the filter system to a new buffer which does not have those
+ * permissions. This can be used to easily disallow buffers with
+ * AV_PERM_REUSE.
+ *
+ * Input pads only.
+ */
+ int rej_perms;
+
+ /**
+ * Callback called before passing the first slice of a new frame. If
+ * NULL, the filter layer will default to storing a reference to the
+ * picture inside the link structure.
+ *
+ * Input video pads only.
+ */
+ void (*start_frame)(AVFilterLink *link, AVFilterBufferRef *picref);
+
+ /**
+ * Callback function to get a video buffer. If NULL, the filter system will
+ * use avfilter_default_get_video_buffer().
+ *
+ * Input video pads only.
+ */
+ AVFilterBufferRef *(*get_video_buffer)(AVFilterLink *link, int perms, int w, int h);
+
+ /**
+ * Callback function to get an audio buffer. If NULL, the filter system will
+ * use avfilter_default_get_audio_buffer().
+ *
+ * Input audio pads only.
+ */
+ AVFilterBufferRef *(*get_audio_buffer)(AVFilterLink *link, int perms,
+ enum AVSampleFormat sample_fmt, int size,
+ int64_t channel_layout, int planar);
+
+ /**
+ * Callback called after the slices of a frame are completely sent. If
+ * NULL, the filter layer will default to releasing the reference stored
+ * in the link structure during start_frame().
+ *
+ * Input video pads only.
+ */
+ void (*end_frame)(AVFilterLink *link);
+
+ /**
+ * Slice drawing callback. This is where a filter receives video data
+ * and should do its processing.
+ *
+ * Input video pads only.
+ */
+ void (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);
+
+ /**
+ * Samples filtering callback. This is where a filter receives audio data
+ * and should do its processing.
+ *
+ * Input audio pads only.
+ */
+ void (*filter_samples)(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+ /**
+ * Frame poll callback. This returns the number of immediately available
+ * samples. It should return a positive value if the next request_frame()
+ * is guaranteed to return one frame (with no delay).
+ *
+ * Defaults to just calling the source poll_frame() method.
+ *
+ * Output video pads only.
+ */
+ int (*poll_frame)(AVFilterLink *link);
+
+ /**
+ * Frame request callback. A call to this should result in at least one
+ * frame being output over the given link. This should return zero on
+ * success, and another value on error.
+ *
+ * Output video pads only.
+ */
+ int (*request_frame)(AVFilterLink *link);
+
+ /**
+ * Link configuration callback.
+ *
+ * For output pads, this should set the link properties such as
+ * width/height. This should NOT set the format property - that is
+ * negotiated between filters by the filter system using the
+ * query_formats() callback before this function is called.
+ *
+ * For input pads, this should check the properties of the link, and update
+ * the filter's internal state as necessary.
+ *
+ * For both input and output filters, this should return zero on success,
+ * and another value on error.
+ */
+ int (*config_props)(AVFilterLink *link);
+};
+
+/** default handler for start_frame() for video inputs */
+void avfilter_default_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
+
+/** default handler for draw_slice() for video inputs */
+void avfilter_default_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
+
+/** default handler for end_frame() for video inputs */
+void avfilter_default_end_frame(AVFilterLink *link);
+
+/** default handler for filter_samples() for audio inputs */
+void avfilter_default_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+/** default handler for config_props() for audio/video outputs */
+int avfilter_default_config_output_link(AVFilterLink *link);
+
+/** default handler for config_props() for audio/video inputs */
+int avfilter_default_config_input_link (AVFilterLink *link);
+
+/** default handler for get_video_buffer() for video inputs */
+AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link,
+ int perms, int w, int h);
+
+/** default handler for get_audio_buffer() for audio inputs */
+AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int perms,
+ enum AVSampleFormat sample_fmt, int size,
+ int64_t channel_layout, int planar);
+
+/**
+ * A helper for query_formats() which sets all links to the same list of
+ * formats. If there are no links hooked to this filter, the list of formats is
+ * freed.
+ */
+void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats);
+
+/** Default handler for query_formats() */
+int avfilter_default_query_formats(AVFilterContext *ctx);
+
+/** start_frame() handler for filters which simply pass video along */
+void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
+
+/** draw_slice() handler for filters which simply pass video along */
+void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
+
+/** end_frame() handler for filters which simply pass video along */
+void avfilter_null_end_frame(AVFilterLink *link);
+
+/** filter_samples() handler for filters which simply pass audio along */
+void avfilter_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+/** get_video_buffer() handler for filters which simply pass video along */
+AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link,
+ int perms, int w, int h);
+
+/** get_audio_buffer() handler for filters which simply pass audio along */
+AVFilterBufferRef *avfilter_null_get_audio_buffer(AVFilterLink *link, int perms,
+ enum AVSampleFormat sample_fmt, int size,
+ int64_t channel_layout, int planar);
+
+/**
+ * Filter definition. This defines the pads a filter contains, and all the
+ * callback functions used to interact with the filter.
+ */
+typedef struct AVFilter {
+ const char *name; ///< filter name
+
+ int priv_size; ///< size of private data to allocate for the filter
+
+ /**
+ * Filter initialization function. Args contains the user-supplied
+ * parameters. FIXME: maybe an AVOption-based system would be better?
+ * opaque is data provided by the code requesting creation of the filter,
+ * and is used to pass data to the filter.
+ */
+ int (*init)(AVFilterContext *ctx, const char *args, void *opaque);
+
+ /**
+ * Filter uninitialization function. Should deallocate any memory held
+ * by the filter, release any buffer references, etc. This does not need
+ * to deallocate the AVFilterContext->priv memory itself.
+ */
+ void (*uninit)(AVFilterContext *ctx);
+
+ /**
+ * Queries formats supported by the filter and its pads, and sets the
+ * in_formats for links connected to its output pads, and out_formats
+ * for links connected to its input pads.
+ *
+ * @return zero on success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+ int (*query_formats)(AVFilterContext *);
+
+ const AVFilterPad *inputs; ///< NULL terminated list of inputs. NULL if none
+ const AVFilterPad *outputs; ///< NULL terminated list of outputs. NULL if none
+
+ /**
+ * A description for the filter. You should use the
+ * NULL_IF_CONFIG_SMALL() macro to define it.
+ */
+ const char *description;
+} AVFilter;
+
+/** An instance of a filter */
+struct AVFilterContext {
+ const AVClass *av_class; ///< needed for av_log()
+
+ AVFilter *filter; ///< the AVFilter of which this is an instance
+
+ char *name; ///< name of this filter instance
+
+ unsigned input_count; ///< number of input pads
+ AVFilterPad *input_pads; ///< array of input pads
+ AVFilterLink **inputs; ///< array of pointers to input links
+
+ unsigned output_count; ///< number of output pads
+ AVFilterPad *output_pads; ///< array of output pads
+ AVFilterLink **outputs; ///< array of pointers to output links
+
+ void *priv; ///< private data for use by the filter
+};
+
+/**
+ * A link between two filters. This contains pointers to the source and
+ * destination filters between which this link exists, and the indexes of
+ * the pads involved. In addition, this link also contains the parameters
+ * which have been negotiated and agreed upon between the filter, such as
+ * image dimensions, format, etc.
+ */
+struct AVFilterLink {
+ AVFilterContext *src; ///< source filter
+ AVFilterPad *srcpad; ///< output pad on the source filter
+
+ AVFilterContext *dst; ///< dest filter
+ AVFilterPad *dstpad; ///< input pad on the dest filter
+
+ /** stage of the initialization of the link properties (dimensions, etc) */
+ enum {
+ AVLINK_UNINIT = 0, ///< not started
+ AVLINK_STARTINIT, ///< started, but incomplete
+ AVLINK_INIT ///< complete
+ } init_state;
+
+ enum AVMediaType type; ///< filter media type
+
+ /* These two parameters apply only to video */
+ int w; ///< agreed upon image width
+ int h; ///< agreed upon image height
+ /* These two parameters apply only to audio */
+ int64_t channel_layout; ///< channel layout of current buffer (see libavcore/audioconvert.h)
+ int64_t sample_rate; ///< samples per second
+
+ int format; ///< agreed upon media format
+
+ /**
+ * Lists of formats supported by the input and output filters respectively.
+ * These lists are used for negotiating the format to actually be used,
+ * which will be loaded into the format member, above, when chosen.
+ */
+ AVFilterFormats *in_formats;
+ AVFilterFormats *out_formats;
+
+ /**
+ * The buffer reference currently being sent across the link by the source
+ * filter. This is used internally by the filter system to allow
+ * automatic copying of buffers which do not have sufficient permissions
+ * for the destination. This should not be accessed directly by the
+ * filters.
+ */
+ AVFilterBufferRef *src_buf;
+
+ AVFilterBufferRef *cur_buf;
+ AVFilterBufferRef *out_buf;
+
+ /**
+ * Define the time base used by the PTS of the frames/samples
+ * which will pass through this link.
+ * During the configuration stage, each filter is supposed to
+ * change only the output timebase, while the timebase of the
+ * input link is assumed to be an unchangeable property.
+ */
+ AVRational time_base;
+};
+
+/**
+ * Link two filters together.
+ *
+ * @param src the source filter
+ * @param srcpad index of the output pad on the source filter
+ * @param dst the destination filter
+ * @param dstpad index of the input pad on the destination filter
+ * @return zero on success
+ */
+int avfilter_link(AVFilterContext *src, unsigned srcpad,
+ AVFilterContext *dst, unsigned dstpad);
+
+/**
+ * Negotiate the media format, dimensions, etc of all inputs to a filter.
+ *
+ * @param filter the filter to negotiate the properties for its inputs
+ * @return zero on successful negotiation
+ */
+int avfilter_config_links(AVFilterContext *filter);
+
+/**
+ * Request a picture buffer with a specific set of permissions.
+ *
+ * @param link the output link to the filter from which the buffer will
+ * be requested
+ * @param perms the required access permissions
+ * @param w the minimum width of the buffer to allocate
+ * @param h the minimum height of the buffer to allocate
+ * @return A reference to the buffer. This must be unreferenced with
+ * avfilter_unref_buffer when you are finished with it.
+ */
+AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms,
+ int w, int h);
+
+/**
+ * Create a buffer reference wrapped around an already allocated image
+ * buffer.
+ *
+ * @param data pointers to the planes of the image to reference
+ * @param linesize linesizes for the planes of the image to reference
+ * @param perms the required access permissions
+ * @param w the width of the image specified by the data and linesize arrays
+ * @param h the height of the image specified by the data and linesize arrays
+ * @param format the pixel format of the image specified by the data and linesize arrays
+ */
+AVFilterBufferRef *
+avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
+ int w, int h, enum PixelFormat format);
+
+/**
+ * Request an audio samples buffer with a specific set of permissions.
+ *
+ * @param link the output link to the filter from which the buffer will
+ * be requested
+ * @param perms the required access permissions
+ * @param sample_fmt the format of each sample in the buffer to allocate
+ * @param size the buffer size in bytes
+ * @param channel_layout the number and type of channels per sample in the buffer to allocate
+ * @param planar audio data layout - planar or packed
+ * @return A reference to the samples. This must be unreferenced with
+ * avfilter_unref_buffer when you are finished with it.
+ */
+AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
+ enum AVSampleFormat sample_fmt, int size,
+ int64_t channel_layout, int planar);
+
+/**
+ * Request an input frame from the filter at the other end of the link.
+ *
+ * @param link the input link
+ * @return zero on success
+ */
+int avfilter_request_frame(AVFilterLink *link);
+
+/**
+ * Poll a frame from the filter chain.
+ *
+ * @param link the input link
+ * @return the number of immediately available frames, a negative
+ * number in case of error
+ */
+int avfilter_poll_frame(AVFilterLink *link);
+
+/**
+ * Notifie the next filter of the start of a frame.
+ *
+ * @param link the output link the frame will be sent over
+ * @param picref A reference to the frame about to be sent. The data for this
+ * frame need only be valid once draw_slice() is called for that
+ * portion. The receiving filter will free this reference when
+ * it no longer needs it.
+ */
+void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
+
+/**
+ * Notifie the next filter that the current frame has finished.
+ *
+ * @param link the output link the frame was sent over
+ */
+void avfilter_end_frame(AVFilterLink *link);
+
+/**
+ * Send a slice to the next filter.
+ *
+ * Slices have to be provided in sequential order, either in
+ * top-bottom or bottom-top order. If slices are provided in
+ * non-sequential order the behavior of the function is undefined.
+ *
+ * @param link the output link over which the frame is being sent
+ * @param y offset in pixels from the top of the image for this slice
+ * @param h height of this slice in pixels
+ * @param slice_dir the assumed direction for sending slices,
+ * from the top slice to the bottom slice if the value is 1,
+ * from the bottom slice to the top slice if the value is -1,
+ * for other values the behavior of the function is undefined.
+ */
+void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
+
+/**
+ * Send a buffer of audio samples to the next filter.
+ *
+ * @param link the output link over which the audio samples are being sent
+ * @param samplesref a reference to the buffer of audio samples being sent. The
+ * receiving filter will free this reference when it no longer
+ * needs it or pass it on to the next filter.
+ */
+void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+/** Initialize the filter system. Register all builtin filters. */
+void avfilter_register_all(void);
+
+/** Uninitialize the filter system. Unregister all filters. */
+void avfilter_uninit(void);
+
+/**
+ * Register a filter. This is only needed if you plan to use
+ * avfilter_get_by_name later to lookup the AVFilter structure by name. A
+ * filter can still by instantiated with avfilter_open even if it is not
+ * registered.
+ *
+ * @param filter the filter to register
+ * @return 0 if the registration was succesfull, a negative value
+ * otherwise
+ */
+int avfilter_register(AVFilter *filter);
+
+/**
+ * Get a filter definition matching the given name.
+ *
+ * @param name the filter name to find
+ * @return the filter definition, if any matching one is registered.
+ * NULL if none found.
+ */
+AVFilter *avfilter_get_by_name(const char *name);
+
+/**
+ * If filter is NULL, returns a pointer to the first registered filter pointer,
+ * if filter is non-NULL, returns the next pointer after filter.
+ * If the returned pointer points to NULL, the last registered filter
+ * was already reached.
+ */
+AVFilter **av_filter_next(AVFilter **filter);
+
+/**
+ * Create a filter instance.
+ *
+ * @param filter_ctx put here a pointer to the created filter context
+ * on success, NULL on failure
+ * @param filter the filter to create an instance of
+ * @param inst_name Name to give to the new instance. Can be NULL for none.
+ * @return >= 0 in case of success, a negative error code otherwise
+ */
+int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name);
+
+/**
+ * Initialize a filter.
+ *
+ * @param filter the filter to initialize
+ * @param args A string of parameters to use when initializing the filter.
+ * The format and meaning of this string varies by filter.
+ * @param opaque Any extra non-string data needed by the filter. The meaning
+ * of this parameter varies by filter.
+ * @return zero on success
+ */
+int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque);
+
+/**
+ * Free a filter context.
+ *
+ * @param filter the filter to free
+ */
+void avfilter_free(AVFilterContext *filter);
+
+/**
+ * Insert a filter in the middle of an existing link.
+ *
+ * @param link the link into which the filter should be inserted
+ * @param filt the filter to be inserted
+ * @param filt_srcpad_idx the input pad on the filter to connect
+ * @param filt_dstpad_idx the output pad on the filter to connect
+ * @return zero on success
+ */
+int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
+ unsigned filt_srcpad_idx, unsigned filt_dstpad_idx);
+
+/**
+ * Insert a new pad.
+ *
+ * @param idx Insertion point. Pad is inserted at the end if this point
+ * is beyond the end of the list of pads.
+ * @param count Pointer to the number of pads in the list
+ * @param padidx_off Offset within an AVFilterLink structure to the element
+ * to increment when inserting a new pad causes link
+ * numbering to change
+ * @param pads Pointer to the pointer to the beginning of the list of pads
+ * @param links Pointer to the pointer to the beginning of the list of links
+ * @param newpad The new pad to add. A copy is made when adding.
+ */
+void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
+ AVFilterPad **pads, AVFilterLink ***links,
+ AVFilterPad *newpad);
+
+/** Insert a new input pad for the filter. */
+static inline void avfilter_insert_inpad(AVFilterContext *f, unsigned index,
+ AVFilterPad *p)
+{
+ avfilter_insert_pad(index, &f->input_count, offsetof(AVFilterLink, dstpad),
+ &f->input_pads, &f->inputs, p);
+}
+
+/** Insert a new output pad for the filter. */
+static inline void avfilter_insert_outpad(AVFilterContext *f, unsigned index,
+ AVFilterPad *p)
+{
+ avfilter_insert_pad(index, &f->output_count, offsetof(AVFilterLink, srcpad),
+ &f->output_pads, &f->outputs, p);
+}
+
+#endif /* AVFILTER_AVFILTER_H */
--- /dev/null
+/*
+ * Filter graphs
+ * copyright (c) 2007 Bobby Bingham
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFILTER_AVFILTERGRAPH_H
+#define AVFILTER_AVFILTERGRAPH_H
+
+#include "avfilter.h"
+
+typedef struct AVFilterGraph {
+ unsigned filter_count;
+ AVFilterContext **filters;
+
+ char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters
+} AVFilterGraph;
+
+/**
+ * Allocate a filter graph.
+ */
+AVFilterGraph *avfilter_graph_alloc(void);
+
+/**
+ * Get a filter instance with name name from graph.
+ *
+ * @return the pointer to the found filter instance or NULL if it
+ * cannot be found.
+ */
+AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name);
+
+/**
+ * Add an existing filter instance to a filter graph.
+ *
+ * @param graphctx the filter graph
+ * @param filter the filter to be added
+ */
+int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
+
+/**
+ * Create and add a filter instance into an existing graph.
+ * The filter instance is created from the filter filt and inited
+ * with the parameters args and opaque.
+ *
+ * In case of success put in *filt_ctx the pointer to the created
+ * filter instance, otherwise set *filt_ctx to NULL.
+ *
+ * @param name the instance name to give to the created filter instance
+ * @param graph_ctx the filter graph
+ * @return a negative AVERROR error code in case of failure, a non
+ * negative value otherwise
+ */
+int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
+ const char *name, const char *args, void *opaque,
+ AVFilterGraph *graph_ctx);
+
+/**
+ * Check validity and configure all the links and formats in the graph.
+ *
+ * @param graphctx the filter graph
+ * @param log_ctx context used for logging
+ * @return 0 in case of success, a negative AVERROR code otherwise
+ */
+int avfilter_graph_config(AVFilterGraph *graphctx, AVClass *log_ctx);
+
+/**
+ * Free a graph and destroy its links, graph may be NULL.
+ */
+void avfilter_graph_free(AVFilterGraph *graph);
+
+/**
+ * A linked-list of the inputs/outputs of the filter chain.
+ *
+ * This is mainly useful for avfilter_graph_parse(), since this
+ * function may accept a description of a graph with not connected
+ * input/output pads. This struct specifies, per each not connected
+ * pad contained in the graph, the filter context and the pad index
+ * required for establishing a link.
+ */
+typedef struct AVFilterInOut {
+ /** unique name for this input/output in the list */
+ char *name;
+
+ /** filter context associated to this input/output */
+ AVFilterContext *filter_ctx;
+
+ /** index of the filt_ctx pad to use for linking */
+ int pad_idx;
+
+ /** next input/input in the list, NULL if this is the last */
+ struct AVFilterInOut *next;
+} AVFilterInOut;
+
+/**
+ * Add a graph described by a string to a graph.
+ *
+ * @param graph the filter graph where to link the parsed graph context
+ * @param filters string to be parsed
+ * @param inputs linked list to the inputs of the graph
+ * @param outputs linked list to the outputs of the graph
+ * @return zero on success, a negative AVERROR code on error
+ */
+int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,
+ AVFilterInOut *inputs, AVFilterInOut *outputs,
+ AVClass *log_ctx);
+
+#endif /* AVFILTER_AVFILTERGRAPH_H */
--- /dev/null
+/*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFORMAT_AVFORMAT_H
+#define AVFORMAT_AVFORMAT_H
+
+#define LIBAVFORMAT_VERSION_MAJOR 52
+#define LIBAVFORMAT_VERSION_MINOR 93
+#define LIBAVFORMAT_VERSION_MICRO 0
+
+#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
+ LIBAVFORMAT_VERSION_MINOR, \
+ LIBAVFORMAT_VERSION_MICRO)
+#define LIBAVFORMAT_VERSION AV_VERSION(LIBAVFORMAT_VERSION_MAJOR, \
+ LIBAVFORMAT_VERSION_MINOR, \
+ LIBAVFORMAT_VERSION_MICRO)
+#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
+
+#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
+
+/**
+ * Those FF_API_* defines are not part of public API.
+ * They may change, break or disappear at any time.
+ */
+#ifndef FF_API_MAX_STREAMS
+#define FF_API_MAX_STREAMS (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_OLD_METADATA
+#define FF_API_OLD_METADATA (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_URL_CLASS
+#define FF_API_URL_CLASS (LIBAVFORMAT_VERSION_MAJOR >= 53)
+#endif
+#ifndef FF_API_URL_RESETBUF
+#define FF_API_URL_RESETBUF (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_REGISTER_PROTOCOL
+#define FF_API_REGISTER_PROTOCOL (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_GUESS_FORMAT
+#define FF_API_GUESS_FORMAT (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_UDP_GET_FILE
+#define FF_API_UDP_GET_FILE (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_URL_SPLIT
+#define FF_API_URL_SPLIT (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_ALLOC_FORMAT_CONTEXT
+#define FF_API_ALLOC_FORMAT_CONTEXT (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_PARSE_FRAME_PARAM
+#define FF_API_PARSE_FRAME_PARAM (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_READ_SEEK
+#define FF_API_READ_SEEK (LIBAVFORMAT_VERSION_MAJOR < 54)
+#endif
+#ifndef FF_API_LAVF_UNUSED
+#define FF_API_LAVF_UNUSED (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_PARAMETERS_CODEC_ID
+#define FF_API_PARAMETERS_CODEC_ID (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_FIRST_FORMAT
+#define FF_API_FIRST_FORMAT (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_SYMVER
+#define FF_API_SYMVER (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+
+/**
+ * I return the LIBAVFORMAT_VERSION_INT constant. You got
+ * a fucking problem with that, douchebag?
+ */
+unsigned avformat_version(void);
+
+/**
+ * Return the libavformat build-time configuration.
+ */
+const char *avformat_configuration(void);
+
+/**
+ * Return the libavformat license.
+ */
+const char *avformat_license(void);
+
+#include <time.h>
+#include <stdio.h> /* FILE */
+#include "libavcodec/avcodec.h"
+
+#include "avio.h"
+
+struct AVFormatContext;
+
+
+/*
+ * Public Metadata API.
+ * The metadata API allows libavformat to export metadata tags to a client
+ * application using a sequence of key/value pairs. Like all strings in FFmpeg,
+ * metadata must be stored as UTF-8 encoded Unicode. Note that metadata
+ * exported by demuxers isn't checked to be valid UTF-8 in most cases.
+ * Important concepts to keep in mind:
+ * 1. Keys are unique; there can never be 2 tags with the same key. This is
+ * also meant semantically, i.e., a demuxer should not knowingly produce
+ * several keys that are literally different but semantically identical.
+ * E.g., key=Author5, key=Author6. In this example, all authors must be
+ * placed in the same tag.
+ * 2. Metadata is flat, not hierarchical; there are no subtags. If you
+ * want to store, e.g., the email address of the child of producer Alice
+ * and actor Bob, that could have key=alice_and_bobs_childs_email_address.
+ * 3. Several modifiers can be applied to the tag name. This is done by
+ * appending a dash character ('-') and the modifier name in the order
+ * they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng.
+ * a) language -- a tag whose value is localized for a particular language
+ * is appended with the ISO 639-2/B 3-letter language code.
+ * For example: Author-ger=Michael, Author-eng=Mike
+ * The original/default language is in the unqualified "Author" tag.
+ * A demuxer should set a default if it sets any translated tag.
+ * b) sorting -- a modified version of a tag that should be used for
+ * sorting will have '-sort' appended. E.g. artist="The Beatles",
+ * artist-sort="Beatles, The".
+ *
+ * 4. Demuxers attempt to export metadata in a generic format, however tags
+ * with no generic equivalents are left as they are stored in the container.
+ * Follows a list of generic tag names:
+ *
+ * album -- name of the set this work belongs to
+ * album_artist -- main creator of the set/album, if different from artist.
+ * e.g. "Various Artists" for compilation albums.
+ * artist -- main creator of the work
+ * comment -- any additional description of the file.
+ * composer -- who composed the work, if different from artist.
+ * copyright -- name of copyright holder.
+ * creation_time-- date when the file was created, preferably in ISO 8601.
+ * date -- date when the work was created, preferably in ISO 8601.
+ * disc -- number of a subset, e.g. disc in a multi-disc collection.
+ * encoder -- name/settings of the software/hardware that produced the file.
+ * encoded_by -- person/group who created the file.
+ * filename -- original name of the file.
+ * genre -- <self-evident>.
+ * language -- main language in which the work is performed, preferably
+ * in ISO 639-2 format.
+ * performer -- artist who performed the work, if different from artist.
+ * E.g for "Also sprach Zarathustra", artist would be "Richard
+ * Strauss" and performer "London Philharmonic Orchestra".
+ * publisher -- name of the label/publisher.
+ * title -- name of the work.
+ * track -- number of this work in the set, can be in form current/total.
+ */
+
+#define AV_METADATA_MATCH_CASE 1
+#define AV_METADATA_IGNORE_SUFFIX 2
+#define AV_METADATA_DONT_STRDUP_KEY 4
+#define AV_METADATA_DONT_STRDUP_VAL 8
+#define AV_METADATA_DONT_OVERWRITE 16 ///< Don't overwrite existing tags.
+
+typedef struct {
+ char *key;
+ char *value;
+}AVMetadataTag;
+
+typedef struct AVMetadata AVMetadata;
+#if FF_API_OLD_METADATA
+typedef struct AVMetadataConv AVMetadataConv;
+#endif
+
+/**
+ * Get a metadata element with matching key.
+ *
+ * @param prev Set to the previous matching element to find the next.
+ * If set to NULL the first matching element is returned.
+ * @param flags Allows case as well as suffix-insensitive comparisons.
+ * @return Found tag or NULL, changing key or value leads to undefined behavior.
+ */
+AVMetadataTag *
+av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
+
+#if FF_API_OLD_METADATA
+/**
+ * Set the given tag in *pm, overwriting an existing tag.
+ *
+ * @param pm pointer to a pointer to a metadata struct. If *pm is NULL
+ * a metadata struct is allocated and put in *pm.
+ * @param key tag key to add to *pm (will be av_strduped)
+ * @param value tag value to add to *pm (will be av_strduped)
+ * @return >= 0 on success otherwise an error code <0
+ * @deprecated Use av_metadata_set2() instead.
+ */
+attribute_deprecated int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
+#endif
+
+/**
+ * Set the given tag in *pm, overwriting an existing tag.
+ *
+ * @param pm pointer to a pointer to a metadata struct. If *pm is NULL
+ * a metadata struct is allocated and put in *pm.
+ * @param key tag key to add to *pm (will be av_strduped depending on flags)
+ * @param value tag value to add to *pm (will be av_strduped depending on flags).
+ * Passing a NULL value will cause an existing tag to be deleted.
+ * @return >= 0 on success otherwise an error code <0
+ */
+int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags);
+
+#if FF_API_OLD_METADATA
+/**
+ * This function is provided for compatibility reason and currently does nothing.
+ */
+attribute_deprecated void av_metadata_conv(struct AVFormatContext *ctx, const AVMetadataConv *d_conv,
+ const AVMetadataConv *s_conv);
+#endif
+
+/**
+ * Copy metadata from one AVMetadata struct into another.
+ * @param dst pointer to a pointer to a AVMetadata struct. If *dst is NULL,
+ * this function will allocate a struct for you and put it in *dst
+ * @param src pointer to source AVMetadata struct
+ * @param flags flags to use when setting metadata in *dst
+ * @note metadata is read using the AV_METADATA_IGNORE_SUFFIX flag
+ */
+void av_metadata_copy(AVMetadata **dst, AVMetadata *src, int flags);
+
+/**
+ * Free all the memory allocated for an AVMetadata struct.
+ */
+void av_metadata_free(AVMetadata **m);
+
+
+/* packet functions */
+
+
+/**
+ * Allocate and read the payload of a packet and initialize its
+ * fields with default values.
+ *
+ * @param pkt packet
+ * @param size desired payload size
+ * @return >0 (read size) if OK, AVERROR_xxx otherwise
+ */
+int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
+
+
+/**
+ * Read data and append it to the current content of the AVPacket.
+ * If pkt->size is 0 this is identical to av_get_packet.
+ * Note that this uses av_grow_packet and thus involves a realloc
+ * which is inefficient. Thus this function should only be used
+ * when there is no reasonable way to know (an upper bound of)
+ * the final size.
+ *
+ * @param pkt packet
+ * @param size amount of data to read
+ * @return >0 (read size) if OK, AVERROR_xxx otherwise, previous data
+ * will not be lost even if an error occurs.
+ */
+int av_append_packet(ByteIOContext *s, AVPacket *pkt, int size);
+
+/*************************************************/
+/* fractional numbers for exact pts handling */
+
+/**
+ * The exact value of the fractional number is: 'val + num / den'.
+ * num is assumed to be 0 <= num < den.
+ */
+typedef struct AVFrac {
+ int64_t val, num, den;
+} AVFrac;
+
+/*************************************************/
+/* input/output formats */
+
+struct AVCodecTag;
+
+/**
+ * This structure contains the data a format has to probe a file.
+ */
+typedef struct AVProbeData {
+ const char *filename;
+ unsigned char *buf; /**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. */
+ int buf_size; /**< Size of buf except extra allocated bytes */
+} AVProbeData;
+
+#define AVPROBE_SCORE_MAX 100 ///< maximum score, half of that is used for file-extension-based detection
+#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
+
+typedef struct AVFormatParameters {
+ AVRational time_base;
+ int sample_rate;
+ int channels;
+ int width;
+ int height;
+ enum PixelFormat pix_fmt;
+ int channel; /**< Used to select DV channel. */
+ const char *standard; /**< TV standard, NTSC, PAL, SECAM */
+ unsigned int mpeg2ts_raw:1; /**< Force raw MPEG-2 transport stream output, if possible. */
+ unsigned int mpeg2ts_compute_pcr:1; /**< Compute exact PCR for each transport
+ stream packet (only meaningful if
+ mpeg2ts_raw is TRUE). */
+ unsigned int initial_pause:1; /**< Do not begin to play the stream
+ immediately (RTSP only). */
+ unsigned int prealloced_context:1;
+#if FF_API_PARAMETERS_CODEC_ID
+ attribute_deprecated enum CodecID video_codec_id;
+ attribute_deprecated enum CodecID audio_codec_id;
+#endif
+} AVFormatParameters;
+
+//! Demuxer will use url_fopen, no opened file should be provided by the caller.
+#define AVFMT_NOFILE 0x0001
+#define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */
+#define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */
+#define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for
+ raw picture data. */
+#define AVFMT_GLOBALHEADER 0x0040 /**< Format wants global header. */
+#define AVFMT_NOTIMESTAMPS 0x0080 /**< Format does not need / have any timestamps. */
+#define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */
+#define AVFMT_TS_DISCONT 0x0200 /**< Format allows timestamp discontinuities. Note, muxers always require valid (monotone) timestamps */
+#define AVFMT_VARIABLE_FPS 0x0400 /**< Format allows variable fps. */
+#define AVFMT_NODIMENSIONS 0x0800 /**< Format does not need width/height */
+#define AVFMT_NOSTREAMS 0x1000 /**< Format does not require any streams */
+
+typedef struct AVOutputFormat {
+ const char *name;
+ /**
+ * Descriptive name for the format, meant to be more human-readable
+ * than name. You should use the NULL_IF_CONFIG_SMALL() macro
+ * to define it.
+ */
+ const char *long_name;
+ const char *mime_type;
+ const char *extensions; /**< comma-separated filename extensions */
+ /**
+ * size of private data so that it can be allocated in the wrapper
+ */
+ int priv_data_size;
+ /* output support */
+ enum CodecID audio_codec; /**< default audio codec */
+ enum CodecID video_codec; /**< default video codec */
+ int (*write_header)(struct AVFormatContext *);
+ int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
+ int (*write_trailer)(struct AVFormatContext *);
+ /**
+ * can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER
+ */
+ int flags;
+ /**
+ * Currently only used to set pixel format if not YUV420P.
+ */
+ int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
+ int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
+ AVPacket *in, int flush);
+
+ /**
+ * List of supported codec_id-codec_tag pairs, ordered by "better
+ * choice first". The arrays are all terminated by CODEC_ID_NONE.
+ */
+ const struct AVCodecTag * const *codec_tag;
+
+ enum CodecID subtitle_codec; /**< default subtitle codec */
+
+#if FF_API_OLD_METADATA
+ const AVMetadataConv *metadata_conv;
+#endif
+
+ const AVClass *priv_class; ///< AVClass for the private context
+
+ /* private fields */
+ struct AVOutputFormat *next;
+} AVOutputFormat;
+
+typedef struct AVInputFormat {
+ /**
+ * A comma separated list of short names for the format. New names
+ * may be appended with a minor bump.
+ */
+ const char *name;
+
+ /**
+ * Descriptive name for the format, meant to be more human-readable
+ * than name. You should use the NULL_IF_CONFIG_SMALL() macro
+ * to define it.
+ */
+ const char *long_name;
+
+ /**
+ * Size of private data so that it can be allocated in the wrapper.
+ */
+ int priv_data_size;
+
+ /**
+ * Tell if a given file has a chance of being parsed as this format.
+ * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes
+ * big so you do not have to check for that unless you need more.
+ */
+ int (*read_probe)(AVProbeData *);
+
+ /**
+ * Read the format header and initialize the AVFormatContext
+ * structure. Return 0 if OK. 'ap' if non-NULL contains
+ * additional parameters. Only used in raw format right
+ * now. 'av_new_stream' should be called to create new streams.
+ */
+ int (*read_header)(struct AVFormatContext *,
+ AVFormatParameters *ap);
+
+ /**
+ * Read one packet and put it in 'pkt'. pts and flags are also
+ * set. 'av_new_stream' can be called only if the flag
+ * AVFMTCTX_NOHEADER is used and only in the calling thread (not in a
+ * background thread).
+ * @return 0 on success, < 0 on error.
+ * When returning an error, pkt must not have been allocated
+ * or must be freed before returning
+ */
+ int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
+
+ /**
+ * Close the stream. The AVFormatContext and AVStreams are not
+ * freed by this function
+ */
+ int (*read_close)(struct AVFormatContext *);
+
+#if FF_API_READ_SEEK
+ /**
+ * Seek to a given timestamp relative to the frames in
+ * stream component stream_index.
+ * @param stream_index Must not be -1.
+ * @param flags Selects which direction should be preferred if no exact
+ * match is available.
+ * @return >= 0 on success (but not necessarily the new offset)
+ */
+ attribute_deprecated int (*read_seek)(struct AVFormatContext *,
+ int stream_index, int64_t timestamp, int flags);
+#endif
+ /**
+ * Gets the next timestamp in stream[stream_index].time_base units.
+ * @return the timestamp or AV_NOPTS_VALUE if an error occurred
+ */
+ int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
+ int64_t *pos, int64_t pos_limit);
+
+ /**
+ * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER.
+ */
+ int flags;
+
+ /**
+ * If extensions are defined, then no probe is done. You should
+ * usually not use extension format guessing because it is not
+ * reliable enough
+ */
+ const char *extensions;
+
+ /**
+ * General purpose read-only value that the format can use.
+ */
+ int value;
+
+ /**
+ * Start/resume playing - only meaningful if using a network-based format
+ * (RTSP).
+ */
+ int (*read_play)(struct AVFormatContext *);
+
+ /**
+ * Pause playing - only meaningful if using a network-based format
+ * (RTSP).
+ */
+ int (*read_pause)(struct AVFormatContext *);
+
+ const struct AVCodecTag * const *codec_tag;
+
+ /**
+ * Seek to timestamp ts.
+ * Seeking will be done so that the point from which all active streams
+ * can be presented successfully will be closest to ts and within min/max_ts.
+ * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
+ */
+ int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
+
+#if FF_API_OLD_METADATA
+ const AVMetadataConv *metadata_conv;
+#endif
+
+ /* private fields */
+ struct AVInputFormat *next;
+} AVInputFormat;
+
+enum AVStreamParseType {
+ AVSTREAM_PARSE_NONE,
+ AVSTREAM_PARSE_FULL, /**< full parsing and repack */
+ AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */
+ AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */
+ AVSTREAM_PARSE_FULL_ONCE, /**< full parsing and repack of the first frame only, only implemented for H.264 currently */
+};
+
+typedef struct AVIndexEntry {
+ int64_t pos;
+ int64_t timestamp;
+#define AVINDEX_KEYFRAME 0x0001
+ int flags:2;
+ int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment).
+ int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */
+} AVIndexEntry;
+
+#define AV_DISPOSITION_DEFAULT 0x0001
+#define AV_DISPOSITION_DUB 0x0002
+#define AV_DISPOSITION_ORIGINAL 0x0004
+#define AV_DISPOSITION_COMMENT 0x0008
+#define AV_DISPOSITION_LYRICS 0x0010
+#define AV_DISPOSITION_KARAOKE 0x0020
+
+/**
+ * Track should be used during playback by default.
+ * Useful for subtitle track that should be displayed
+ * even when user did not explicitly ask for subtitles.
+ */
+#define AV_DISPOSITION_FORCED 0x0040
+
+/**
+ * Stream structure.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(AVStream) must not be used outside libav*.
+ */
+typedef struct AVStream {
+ int index; /**< stream index in AVFormatContext */
+ int id; /**< format-specific stream ID */
+ AVCodecContext *codec; /**< codec context */
+ /**
+ * Real base framerate of the stream.
+ * This is the lowest framerate with which all timestamps can be
+ * represented accurately (it is the least common multiple of all
+ * framerates in the stream). Note, this value is just a guess!
+ * For example, if the time base is 1/90000 and all frames have either
+ * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
+ */
+ AVRational r_frame_rate;
+ void *priv_data;
+
+ /* internal data used in av_find_stream_info() */
+ int64_t first_dts;
+
+ /**
+ * encoding: pts generation when outputting stream
+ */
+ struct AVFrac pts;
+
+ /**
+ * This is the fundamental unit of time (in seconds) in terms
+ * of which frame timestamps are represented. For fixed-fps content,
+ * time base should be 1/framerate and timestamp increments should be 1.
+ */
+ AVRational time_base;
+ int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
+ /* ffmpeg.c private use */
+ int stream_copy; /**< If set, just copy stream. */
+ enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
+
+ //FIXME move stuff to a flags field?
+ /**
+ * Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
+ * MN: dunno if that is the right place for it
+ */
+ float quality;
+
+ /**
+ * Decoding: pts of the first frame of the stream, in stream time base.
+ * Only set this if you are absolutely 100% sure that the value you set
+ * it to really is the pts of the first frame.
+ * This may be undefined (AV_NOPTS_VALUE).
+ * @note The ASF header does NOT contain a correct start_time the ASF
+ * demuxer must NOT set this.
+ */
+ int64_t start_time;
+
+ /**
+ * Decoding: duration of the stream, in stream time base.
+ * If a source file does not specify a duration, but does specify
+ * a bitrate, this value will be estimated from bitrate and file size.
+ */
+ int64_t duration;
+
+#if FF_API_OLD_METADATA
+ attribute_deprecated char language[4]; /**< ISO 639-2/B 3-letter language code (empty string if undefined) */
+#endif
+
+ /* av_read_frame() support */
+ enum AVStreamParseType need_parsing;
+ struct AVCodecParserContext *parser;
+
+ int64_t cur_dts;
+ int last_IP_duration;
+ int64_t last_IP_pts;
+ /* av_seek_frame() support */
+ AVIndexEntry *index_entries; /**< Only used if the format does not
+ support seeking natively. */
+ int nb_index_entries;
+ unsigned int index_entries_allocated_size;
+
+ int64_t nb_frames; ///< number of frames in this stream if known or 0
+
+#if FF_API_LAVF_UNUSED
+ attribute_deprecated int64_t unused[4+1];
+#endif
+
+#if FF_API_OLD_METADATA
+ attribute_deprecated char *filename; /**< source filename of the stream */
+#endif
+
+ int disposition; /**< AV_DISPOSITION_* bit field */
+
+ AVProbeData probe_data;
+#define MAX_REORDER_DELAY 16
+ int64_t pts_buffer[MAX_REORDER_DELAY+1];
+
+ /**
+ * sample aspect ratio (0 if unknown)
+ * - encoding: Set by user.
+ * - decoding: Set by libavformat.
+ */
+ AVRational sample_aspect_ratio;
+
+ AVMetadata *metadata;
+
+ /* Intended mostly for av_read_frame() support. Not supposed to be used by */
+ /* external applications; try to use something else if at all possible. */
+ const uint8_t *cur_ptr;
+ int cur_len;
+ AVPacket cur_pkt;
+
+ // Timestamp generation support:
+ /**
+ * Timestamp corresponding to the last dts sync point.
+ *
+ * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
+ * a DTS is received from the underlying container. Otherwise set to
+ * AV_NOPTS_VALUE by default.
+ */
+ int64_t reference_dts;
+
+ /**
+ * Number of packets to buffer for codec probing
+ * NOT PART OF PUBLIC API
+ */
+#define MAX_PROBE_PACKETS 2500
+ int probe_packets;
+
+ /**
+ * last packet in packet_buffer for this stream when muxing.
+ * used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav*
+ */
+ struct AVPacketList *last_in_packet_buffer;
+
+ /**
+ * Average framerate
+ */
+ AVRational avg_frame_rate;
+
+ /**
+ * Number of frames that have been demuxed during av_find_stream_info()
+ */
+ int codec_info_nb_frames;
+
+ /**
+ * Stream informations used internally by av_find_stream_info()
+ */
+#define MAX_STD_TIMEBASES (60*12+5)
+ struct {
+ int64_t last_dts;
+ int64_t duration_gcd;
+ int duration_count;
+ double duration_error[MAX_STD_TIMEBASES];
+ int64_t codec_info_duration;
+ } *info;
+} AVStream;
+
+#define AV_PROGRAM_RUNNING 1
+
+/**
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(AVProgram) must not be used outside libav*.
+ */
+typedef struct AVProgram {
+ int id;
+#if FF_API_OLD_METADATA
+ attribute_deprecated char *provider_name; ///< network name for DVB streams
+ attribute_deprecated char *name; ///< service name for DVB streams
+#endif
+ int flags;
+ enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller
+ unsigned int *stream_index;
+ unsigned int nb_stream_indexes;
+ AVMetadata *metadata;
+} AVProgram;
+
+#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
+ (streams are added dynamically) */
+
+typedef struct AVChapter {
+ int id; ///< unique ID to identify the chapter
+ AVRational time_base; ///< time base in which the start/end timestamps are specified
+ int64_t start, end; ///< chapter start/end time in time_base units
+#if FF_API_OLD_METADATA
+ attribute_deprecated char *title; ///< chapter title
+#endif
+ AVMetadata *metadata;
+} AVChapter;
+
+#if FF_API_MAX_STREAMS
+#define MAX_STREAMS 20
+#endif
+
+/**
+ * Format I/O context.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(AVFormatContext) must not be used outside libav*.
+ */
+typedef struct AVFormatContext {
+ const AVClass *av_class; /**< Set by avformat_alloc_context. */
+ /* Can only be iformat or oformat, not both at the same time. */
+ struct AVInputFormat *iformat;
+ struct AVOutputFormat *oformat;
+ void *priv_data;
+ ByteIOContext *pb;
+ unsigned int nb_streams;
+#if FF_API_MAX_STREAMS
+ AVStream *streams[MAX_STREAMS];
+#else
+ AVStream **streams;
+#endif
+ char filename[1024]; /**< input or output filename */
+ /* stream info */
+ int64_t timestamp;
+#if FF_API_OLD_METADATA
+ attribute_deprecated char title[512];
+ attribute_deprecated char author[512];
+ attribute_deprecated char copyright[512];
+ attribute_deprecated char comment[512];
+ attribute_deprecated char album[512];
+ attribute_deprecated int year; /**< ID3 year, 0 if none */
+ attribute_deprecated int track; /**< track number, 0 if none */
+ attribute_deprecated char genre[32]; /**< ID3 genre */
+#endif
+
+ int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
+ /* private data for pts handling (do not modify directly). */
+ /**
+ * This buffer is only needed when packets were already buffered but
+ * not decoded, for example to get the codec parameters in MPEG
+ * streams.
+ */
+ struct AVPacketList *packet_buffer;
+
+ /**
+ * Decoding: position of the first frame of the component, in
+ * AV_TIME_BASE fractional seconds. NEVER set this value directly:
+ * It is deduced from the AVStream values.
+ */
+ int64_t start_time;
+
+ /**
+ * Decoding: duration of the stream, in AV_TIME_BASE fractional
+ * seconds. Only set this value if you know none of the individual stream
+ * durations and also dont set any of them. This is deduced from the
+ * AVStream values if not set.
+ */
+ int64_t duration;
+
+ /**
+ * decoding: total file size, 0 if unknown
+ */
+ int64_t file_size;
+
+ /**
+ * Decoding: total stream bitrate in bit/s, 0 if not
+ * available. Never set it directly if the file_size and the
+ * duration are known as FFmpeg can compute it automatically.
+ */
+ int bit_rate;
+
+ /* av_read_frame() support */
+ AVStream *cur_st;
+#if FF_API_LAVF_UNUSED
+ const uint8_t *cur_ptr_deprecated;
+ int cur_len_deprecated;
+ AVPacket cur_pkt_deprecated;
+#endif
+
+ /* av_seek_frame() support */
+ int64_t data_offset; /**< offset of the first packet */
+ int index_built;
+
+ int mux_rate;
+ unsigned int packet_size;
+ int preload;
+ int max_delay;
+
+#define AVFMT_NOOUTPUTLOOP -1
+#define AVFMT_INFINITEOUTPUTLOOP 0
+ /**
+ * number of times to loop output in formats that support it
+ */
+ int loop_output;
+
+ int flags;
+#define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames.
+#define AVFMT_FLAG_IGNIDX 0x0002 ///< Ignore index.
+#define AVFMT_FLAG_NONBLOCK 0x0004 ///< Do not block when reading packets from input.
+#define AVFMT_FLAG_IGNDTS 0x0008 ///< Ignore DTS on frames that contain both DTS & PTS
+#define AVFMT_FLAG_NOFILLIN 0x0010 ///< Do not infer any values from other values, just return what is stored in the container
+#define AVFMT_FLAG_NOPARSE 0x0020 ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled
+#define AVFMT_FLAG_RTP_HINT 0x0040 ///< Add RTP hinting to the output file
+
+ int loop_input;
+
+ /**
+ * decoding: size of data to probe; encoding: unused.
+ */
+ unsigned int probesize;
+
+ /**
+ * Maximum time (in AV_TIME_BASE units) during which the input should
+ * be analyzed in av_find_stream_info().
+ */
+ int max_analyze_duration;
+
+ const uint8_t *key;
+ int keylen;
+
+ unsigned int nb_programs;
+ AVProgram **programs;
+
+ /**
+ * Forced video codec_id.
+ * Demuxing: Set by user.
+ */
+ enum CodecID video_codec_id;
+
+ /**
+ * Forced audio codec_id.
+ * Demuxing: Set by user.
+ */
+ enum CodecID audio_codec_id;
+
+ /**
+ * Forced subtitle codec_id.
+ * Demuxing: Set by user.
+ */
+ enum CodecID subtitle_codec_id;
+
+ /**
+ * Maximum amount of memory in bytes to use for the index of each stream.
+ * If the index exceeds this size, entries will be discarded as
+ * needed to maintain a smaller size. This can lead to slower or less
+ * accurate seeking (depends on demuxer).
+ * Demuxers for which a full in-memory index is mandatory will ignore
+ * this.
+ * muxing : unused
+ * demuxing: set by user
+ */
+ unsigned int max_index_size;
+
+ /**
+ * Maximum amount of memory in bytes to use for buffering frames
+ * obtained from realtime capture devices.
+ */
+ unsigned int max_picture_buffer;
+
+ unsigned int nb_chapters;
+ AVChapter **chapters;
+
+ /**
+ * Flags to enable debugging.
+ */
+ int debug;
+#define FF_FDEBUG_TS 0x0001
+
+ /**
+ * Raw packets from the demuxer, prior to parsing and decoding.
+ * This buffer is used for buffering packets until the codec can
+ * be identified, as parsing cannot be done without knowing the
+ * codec.
+ */
+ struct AVPacketList *raw_packet_buffer;
+ struct AVPacketList *raw_packet_buffer_end;
+
+ struct AVPacketList *packet_buffer_end;
+
+ AVMetadata *metadata;
+
+ /**
+ * Remaining size available for raw_packet_buffer, in bytes.
+ * NOT PART OF PUBLIC API
+ */
+#define RAW_PACKET_BUFFER_SIZE 2500000
+ int raw_packet_buffer_remaining_size;
+
+ /**
+ * Start time of the stream in real world time, in microseconds
+ * since the unix epoch (00:00 1st January 1970). That is, pts=0
+ * in the stream was captured at this real world time.
+ * - encoding: Set by user.
+ * - decoding: Unused.
+ */
+ int64_t start_time_realtime;
+} AVFormatContext;
+
+typedef struct AVPacketList {
+ AVPacket pkt;
+ struct AVPacketList *next;
+} AVPacketList;
+
+#if FF_API_FIRST_FORMAT
+attribute_deprecated extern AVInputFormat *first_iformat;
+attribute_deprecated extern AVOutputFormat *first_oformat;
+#endif
+
+/**
+ * If f is NULL, returns the first registered input format,
+ * if f is non-NULL, returns the next registered input format after f
+ * or NULL if f is the last one.
+ */
+AVInputFormat *av_iformat_next(AVInputFormat *f);
+
+/**
+ * If f is NULL, returns the first registered output format,
+ * if f is non-NULL, returns the next registered output format after f
+ * or NULL if f is the last one.
+ */
+AVOutputFormat *av_oformat_next(AVOutputFormat *f);
+
+enum CodecID av_guess_image2_codec(const char *filename);
+
+/* XXX: Use automatic init with either ELF sections or C file parser */
+/* modules. */
+
+/* utils.c */
+void av_register_input_format(AVInputFormat *format);
+void av_register_output_format(AVOutputFormat *format);
+#if FF_API_GUESS_FORMAT
+attribute_deprecated AVOutputFormat *guess_stream_format(const char *short_name,
+ const char *filename,
+ const char *mime_type);
+
+/**
+ * @deprecated Use av_guess_format() instead.
+ */
+attribute_deprecated AVOutputFormat *guess_format(const char *short_name,
+ const char *filename,
+ const char *mime_type);
+#endif
+
+/**
+ * Return the output format in the list of registered output formats
+ * which best matches the provided parameters, or return NULL if
+ * there is no match.
+ *
+ * @param short_name if non-NULL checks if short_name matches with the
+ * names of the registered formats
+ * @param filename if non-NULL checks if filename terminates with the
+ * extensions of the registered formats
+ * @param mime_type if non-NULL checks if mime_type matches with the
+ * MIME type of the registered formats
+ */
+AVOutputFormat *av_guess_format(const char *short_name,
+ const char *filename,
+ const char *mime_type);
+
+/**
+ * Guess the codec ID based upon muxer and filename.
+ */
+enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
+ const char *filename, const char *mime_type,
+ enum AVMediaType type);
+
+/**
+ * Send a nice hexadecimal dump of a buffer to the specified file stream.
+ *
+ * @param f The file stream pointer where the dump should be sent to.
+ * @param buf buffer
+ * @param size buffer size
+ *
+ * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
+ */
+void av_hex_dump(FILE *f, uint8_t *buf, int size);
+
+/**
+ * Send a nice hexadecimal dump of a buffer to the log.
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ * pointer to an AVClass struct.
+ * @param level The importance level of the message, lower values signifying
+ * higher importance.
+ * @param buf buffer
+ * @param size buffer size
+ *
+ * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
+ */
+void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
+
+/**
+ * Send a nice dump of a packet to the specified file stream.
+ *
+ * @param f The file stream pointer where the dump should be sent to.
+ * @param pkt packet to dump
+ * @param dump_payload True if the payload must be displayed, too.
+ */
+void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
+
+/**
+ * Send a nice dump of a packet to the log.
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ * pointer to an AVClass struct.
+ * @param level The importance level of the message, lower values signifying
+ * higher importance.
+ * @param pkt packet to dump
+ * @param dump_payload True if the payload must be displayed, too.
+ */
+void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
+
+/**
+ * Initialize libavformat and register all the muxers, demuxers and
+ * protocols. If you do not call this function, then you can select
+ * exactly which formats you want to support.
+ *
+ * @see av_register_input_format()
+ * @see av_register_output_format()
+ * @see av_register_protocol()
+ */
+void av_register_all(void);
+
+/**
+ * Get the CodecID for the given codec tag tag.
+ * If no codec id is found returns CODEC_ID_NONE.
+ *
+ * @param tags list of supported codec_id-codec_tag pairs, as stored
+ * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
+ */
+enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
+
+/**
+ * Get the codec tag for the given codec id id.
+ * If no codec tag is found returns 0.
+ *
+ * @param tags list of supported codec_id-codec_tag pairs, as stored
+ * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
+ */
+unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id);
+
+/* media file input */
+
+/**
+ * Find AVInputFormat based on the short name of the input format.
+ */
+AVInputFormat *av_find_input_format(const char *short_name);
+
+/**
+ * Guess the file format.
+ *
+ * @param is_opened Whether the file is already opened; determines whether
+ * demuxers with or without AVFMT_NOFILE are probed.
+ */
+AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
+
+/**
+ * Guess the file format.
+ *
+ * @param is_opened Whether the file is already opened; determines whether
+ * demuxers with or without AVFMT_NOFILE are probed.
+ * @param score_max A probe score larger that this is required to accept a
+ * detection, the variable is set to the actual detection
+ * score afterwards.
+ * If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended
+ * to retry with a larger probe buffer.
+ */
+AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max);
+
+/**
+ * Allocate all the structures needed to read an input stream.
+ * This does not open the needed codecs for decoding the stream[s].
+ */
+int av_open_input_stream(AVFormatContext **ic_ptr,
+ ByteIOContext *pb, const char *filename,
+ AVInputFormat *fmt, AVFormatParameters *ap);
+
+/**
+ * Open a media file as input. The codecs are not opened. Only the file
+ * header (if present) is read.
+ *
+ * @param ic_ptr The opened media file handle is put here.
+ * @param filename filename to open
+ * @param fmt If non-NULL, force the file format to use.
+ * @param buf_size optional buffer size (zero if default is OK)
+ * @param ap Additional parameters needed when opening the file
+ * (NULL if default).
+ * @return 0 if OK, AVERROR_xxx otherwise
+ */
+int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
+ AVInputFormat *fmt,
+ int buf_size,
+ AVFormatParameters *ap);
+
+#if FF_API_ALLOC_FORMAT_CONTEXT
+/**
+ * @deprecated Use avformat_alloc_context() instead.
+ */
+attribute_deprecated AVFormatContext *av_alloc_format_context(void);
+#endif
+
+/**
+ * Allocate an AVFormatContext.
+ * Can be freed with av_free() but do not forget to free everything you
+ * explicitly allocated as well!
+ */
+AVFormatContext *avformat_alloc_context(void);
+
+/**
+ * Read packets of a media file to get stream information. This
+ * is useful for file formats with no headers such as MPEG. This
+ * function also computes the real framerate in case of MPEG-2 repeat
+ * frame mode.
+ * The logical file position is not changed by this function;
+ * examined packets may be buffered for later processing.
+ *
+ * @param ic media file handle
+ * @return >=0 if OK, AVERROR_xxx on error
+ * @todo Let the user decide somehow what information is needed so that
+ * we do not waste time getting stuff the user does not need.
+ */
+int av_find_stream_info(AVFormatContext *ic);
+
+/**
+ * Find the "best" stream in the file.
+ * The best stream is determined according to various heuristics as the most
+ * likely to be what the user expects.
+ * If the decoder parameter is non-NULL, av_find_best_stream will find the
+ * default decoder for the stream's codec; streams for which no decoder can
+ * be found are ignored.
+ *
+ * @param ic media file handle
+ * @param type stream type: video, audio, subtitles, etc.
+ * @param wanted_stream_nb user-requested stream number,
+ * or -1 for automatic selection
+ * @param related_stream try to find a stream related (eg. in the same
+ * program) to this one, or -1 if none
+ * @param decoder_ret if non-NULL, returns the decoder for the
+ * selected stream
+ * @param flags flags; none are currently defined
+ * @return the non-negative stream number in case of success,
+ * AVERROR_STREAM_NOT_FOUND if no stream with the requested type
+ * could be found,
+ * AVERROR_DECODER_NOT_FOUND if streams were found but no decoder
+ * @note If av_find_best_stream returns successfully and decoder_ret is not
+ * NULL, then *decoder_ret is guaranteed to be set to a valid AVCodec.
+ */
+int av_find_best_stream(AVFormatContext *ic,
+ enum AVMediaType type,
+ int wanted_stream_nb,
+ int related_stream,
+ AVCodec **decoder_ret,
+ int flags);
+
+/**
+ * Read a transport packet from a media file.
+ *
+ * This function is obsolete and should never be used.
+ * Use av_read_frame() instead.
+ *
+ * @param s media file handle
+ * @param pkt is filled
+ * @return 0 if OK, AVERROR_xxx on error
+ */
+int av_read_packet(AVFormatContext *s, AVPacket *pkt);
+
+/**
+ * Return the next frame of a stream.
+ * This function returns what is stored in the file, and does not validate
+ * that what is there are valid frames for the decoder. It will split what is
+ * stored in the file into frames and return one for each call. It will not
+ * omit invalid data between valid frames so as to give the decoder the maximum
+ * information possible for decoding.
+ *
+ * The returned packet is valid
+ * until the next av_read_frame() or until av_close_input_file() and
+ * must be freed with av_free_packet. For video, the packet contains
+ * exactly one frame. For audio, it contains an integer number of
+ * frames if each frame has a known fixed size (e.g. PCM or ADPCM
+ * data). If the audio frames have a variable size (e.g. MPEG audio),
+ * then it contains one frame.
+ *
+ * pkt->pts, pkt->dts and pkt->duration are always set to correct
+ * values in AVStream.time_base units (and guessed if the format cannot
+ * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
+ * has B-frames, so it is better to rely on pkt->dts if you do not
+ * decompress the payload.
+ *
+ * @return 0 if OK, < 0 on error or end of file
+ */
+int av_read_frame(AVFormatContext *s, AVPacket *pkt);
+
+/**
+ * Seek to the keyframe at timestamp.
+ * 'timestamp' in 'stream_index'.
+ * @param stream_index If stream_index is (-1), a default
+ * stream is selected, and timestamp is automatically converted
+ * from AV_TIME_BASE units to the stream specific time_base.
+ * @param timestamp Timestamp in AVStream.time_base units
+ * or, if no stream is specified, in AV_TIME_BASE units.
+ * @param flags flags which select direction and seeking mode
+ * @return >= 0 on success
+ */
+int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
+ int flags);
+
+/**
+ * Seek to timestamp ts.
+ * Seeking will be done so that the point from which all active streams
+ * can be presented successfully will be closest to ts and within min/max_ts.
+ * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
+ *
+ * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and
+ * are the file position (this may not be supported by all demuxers).
+ * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames
+ * in the stream with stream_index (this may not be supported by all demuxers).
+ * Otherwise all timestamps are in units of the stream selected by stream_index
+ * or if stream_index is -1, in AV_TIME_BASE units.
+ * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as
+ * keyframes (this may not be supported by all demuxers).
+ *
+ * @param stream_index index of the stream which is used as time base reference
+ * @param min_ts smallest acceptable timestamp
+ * @param ts target timestamp
+ * @param max_ts largest acceptable timestamp
+ * @param flags flags
+ * @return >=0 on success, error code otherwise
+ *
+ * @note This is part of the new seek API which is still under construction.
+ * Thus do not use this yet. It may change at any time, do not expect
+ * ABI compatibility yet!
+ */
+int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
+
+/**
+ * Start playing a network-based stream (e.g. RTSP stream) at the
+ * current position.
+ */
+int av_read_play(AVFormatContext *s);
+
+/**
+ * Pause a network-based stream (e.g. RTSP stream).
+ *
+ * Use av_read_play() to resume it.
+ */
+int av_read_pause(AVFormatContext *s);
+
+/**
+ * Free a AVFormatContext allocated by av_open_input_stream.
+ * @param s context to free
+ */
+void av_close_input_stream(AVFormatContext *s);
+
+/**
+ * Close a media file (but not its codecs).
+ *
+ * @param s media file handle
+ */
+void av_close_input_file(AVFormatContext *s);
+
+/**
+ * Add a new stream to a media file.
+ *
+ * Can only be called in the read_header() function. If the flag
+ * AVFMTCTX_NOHEADER is in the format context, then new streams
+ * can be added in read_packet too.
+ *
+ * @param s media file handle
+ * @param id file-format-dependent stream ID
+ */
+AVStream *av_new_stream(AVFormatContext *s, int id);
+AVProgram *av_new_program(AVFormatContext *s, int id);
+
+/**
+ * Add a new chapter.
+ * This function is NOT part of the public API
+ * and should ONLY be used by demuxers.
+ *
+ * @param s media file handle
+ * @param id unique ID for this chapter
+ * @param start chapter start time in time_base units
+ * @param end chapter end time in time_base units
+ * @param title chapter title
+ *
+ * @return AVChapter or NULL on error
+ */
+AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
+ int64_t start, int64_t end, const char *title);
+
+/**
+ * Set the pts for a given stream.
+ *
+ * @param s stream
+ * @param pts_wrap_bits number of bits effectively used by the pts
+ * (used for wrap control, 33 is the value for MPEG)
+ * @param pts_num numerator to convert to seconds (MPEG: 1)
+ * @param pts_den denominator to convert to seconds (MPEG: 90000)
+ */
+void av_set_pts_info(AVStream *s, int pts_wrap_bits,
+ unsigned int pts_num, unsigned int pts_den);
+
+#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
+#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
+#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non-keyframes
+#define AVSEEK_FLAG_FRAME 8 ///< seeking based on frame number
+
+int av_find_default_stream_index(AVFormatContext *s);
+
+/**
+ * Get the index for a specific timestamp.
+ * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
+ * to the timestamp which is <= the requested one, if backward
+ * is 0, then it will be >=
+ * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
+ * @return < 0 if no such timestamp could be found
+ */
+int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
+
+/**
+ * Ensure the index uses less memory than the maximum specified in
+ * AVFormatContext.max_index_size by discarding entries if it grows
+ * too large.
+ * This function is not part of the public API and should only be called
+ * by demuxers.
+ */
+void ff_reduce_index(AVFormatContext *s, int stream_index);
+
+/**
+ * Add an index entry into a sorted list. Update the entry if the list
+ * already contains it.
+ *
+ * @param timestamp timestamp in the time base of the given stream
+ */
+int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
+ int size, int distance, int flags);
+
+/**
+ * Perform a binary search using av_index_search_timestamp() and
+ * AVInputFormat.read_timestamp().
+ * This is not supposed to be called directly by a user application,
+ * but by demuxers.
+ * @param target_ts target timestamp in the time base of the given stream
+ * @param stream_index stream number
+ */
+int av_seek_frame_binary(AVFormatContext *s, int stream_index,
+ int64_t target_ts, int flags);
+
+/**
+ * Update cur_dts of all streams based on the given timestamp and AVStream.
+ *
+ * Stream ref_st unchanged, others set cur_dts in their native time base.
+ * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
+ * @param timestamp new dts expressed in time_base of param ref_st
+ * @param ref_st reference stream giving time_base of param timestamp
+ */
+void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
+
+/**
+ * Perform a binary search using read_timestamp().
+ * This is not supposed to be called directly by a user application,
+ * but by demuxers.
+ * @param target_ts target timestamp in the time base of the given stream
+ * @param stream_index stream number
+ */
+int64_t av_gen_search(AVFormatContext *s, int stream_index,
+ int64_t target_ts, int64_t pos_min,
+ int64_t pos_max, int64_t pos_limit,
+ int64_t ts_min, int64_t ts_max,
+ int flags, int64_t *ts_ret,
+ int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
+
+/**
+ * media file output
+ */
+int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
+
+/**
+ * Split a URL string into components.
+ *
+ * The pointers to buffers for storing individual components may be null,
+ * in order to ignore that component. Buffers for components not found are
+ * set to empty strings. If the port is not found, it is set to a negative
+ * value.
+ *
+ * @param proto the buffer for the protocol
+ * @param proto_size the size of the proto buffer
+ * @param authorization the buffer for the authorization
+ * @param authorization_size the size of the authorization buffer
+ * @param hostname the buffer for the host name
+ * @param hostname_size the size of the hostname buffer
+ * @param port_ptr a pointer to store the port number in
+ * @param path the buffer for the path
+ * @param path_size the size of the path buffer
+ * @param url the URL to split
+ */
+void av_url_split(char *proto, int proto_size,
+ char *authorization, int authorization_size,
+ char *hostname, int hostname_size,
+ int *port_ptr,
+ char *path, int path_size,
+ const char *url);
+
+/**
+ * Allocate the stream private data and write the stream header to an
+ * output media file.
+ *
+ * @param s media file handle
+ * @return 0 if OK, AVERROR_xxx on error
+ */
+int av_write_header(AVFormatContext *s);
+
+/**
+ * Write a packet to an output media file.
+ *
+ * The packet shall contain one audio or video frame.
+ * The packet must be correctly interleaved according to the container
+ * specification, if not then av_interleaved_write_frame must be used.
+ *
+ * @param s media file handle
+ * @param pkt The packet, which contains the stream_index, buf/buf_size,
+ dts/pts, ...
+ * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
+ */
+int av_write_frame(AVFormatContext *s, AVPacket *pkt);
+
+/**
+ * Write a packet to an output media file ensuring correct interleaving.
+ *
+ * The packet must contain one audio or video frame.
+ * If the packets are already correctly interleaved, the application should
+ * call av_write_frame() instead as it is slightly faster. It is also important
+ * to keep in mind that completely non-interleaved input will need huge amounts
+ * of memory to interleave with this, so it is preferable to interleave at the
+ * demuxer level.
+ *
+ * @param s media file handle
+ * @param pkt The packet, which contains the stream_index, buf/buf_size,
+ dts/pts, ...
+ * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
+ */
+int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
+
+/**
+ * Interleave a packet per dts in an output media file.
+ *
+ * Packets with pkt->destruct == av_destruct_packet will be freed inside this
+ * function, so they cannot be used after it. Note that calling av_free_packet()
+ * on them is still safe.
+ *
+ * @param s media file handle
+ * @param out the interleaved packet will be output here
+ * @param pkt the input packet
+ * @param flush 1 if no further packets are available as input and all
+ * remaining packets should be output
+ * @return 1 if a packet was output, 0 if no packet could be output,
+ * < 0 if an error occurred
+ */
+int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
+ AVPacket *pkt, int flush);
+
+/**
+ * Write the stream trailer to an output media file and free the
+ * file private data.
+ *
+ * May only be called after a successful call to av_write_header.
+ *
+ * @param s media file handle
+ * @return 0 if OK, AVERROR_xxx on error
+ */
+int av_write_trailer(AVFormatContext *s);
+
+void dump_format(AVFormatContext *ic,
+ int index,
+ const char *url,
+ int is_output);
+
+#if FF_API_PARSE_FRAME_PARAM
+/**
+ * Parse width and height out of string str.
+ * @deprecated Use av_parse_video_frame_size instead.
+ */
+attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
+ const char *str);
+
+/**
+ * Convert framerate from a string to a fraction.
+ * @deprecated Use av_parse_video_frame_rate instead.
+ */
+attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
+ const char *arg);
+#endif
+
+/**
+ * Parse datestr and return a corresponding number of microseconds.
+ * @param datestr String representing a date or a duration.
+ * - If a date the syntax is:
+ * @code
+ * now|{[{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH[:MM[:SS[.m...]]]}|{HH[MM[SS[.m...]]]}}[Z|z]}
+ * @endcode
+ * If the value is "now" it takes the current time.
+ * Time is local time unless Z is appended, in which case it is
+ * interpreted as UTC.
+ * If the year-month-day part is not specified it takes the current
+ * year-month-day.
+ * @return the number of microseconds since 1st of January, 1970 up to
+ * the time of the parsed date or INT64_MIN if datestr cannot be
+ * successfully parsed.
+ * - If a duration the syntax is:
+ * @code
+ * [-]HH[:MM[:SS[.m...]]]
+ * [-]S+[.m...]
+ * @endcode
+ * @return the number of microseconds contained in a time interval
+ * with the specified duration or INT64_MIN if datestr cannot be
+ * successfully parsed.
+ * @param duration Flag which tells how to interpret datestr, if
+ * not zero datestr is interpreted as a duration, otherwise as a
+ * date.
+ */
+int64_t parse_date(const char *datestr, int duration);
+
+/**
+ * Get the current time in microseconds.
+ */
+int64_t av_gettime(void);
+
+/* ffm-specific for ffserver */
+#define FFM_PACKET_SIZE 4096
+int64_t ffm_read_write_index(int fd);
+int ffm_write_write_index(int fd, int64_t pos);
+void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
+
+/**
+ * Attempt to find a specific tag in a URL.
+ *
+ * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
+ * Return 1 if found.
+ */
+int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
+
+/**
+ * Return in 'buf' the path with '%d' replaced by a number.
+ *
+ * Also handles the '%0nd' format where 'n' is the total number
+ * of digits and '%%'.
+ *
+ * @param buf destination buffer
+ * @param buf_size destination buffer size
+ * @param path numbered sequence string
+ * @param number frame number
+ * @return 0 if OK, -1 on format error
+ */
+int av_get_frame_filename(char *buf, int buf_size,
+ const char *path, int number);
+
+/**
+ * Check whether filename actually is a numbered sequence generator.
+ *
+ * @param filename possible numbered sequence string
+ * @return 1 if a valid numbered sequence string, 0 otherwise
+ */
+int av_filename_number_test(const char *filename);
+
+/**
+ * Generate an SDP for an RTP session.
+ *
+ * @param ac array of AVFormatContexts describing the RTP streams. If the
+ * array is composed by only one context, such context can contain
+ * multiple AVStreams (one AVStream per RTP stream). Otherwise,
+ * all the contexts in the array (an AVCodecContext per RTP stream)
+ * must contain only one AVStream.
+ * @param n_files number of AVCodecContexts contained in ac
+ * @param buff buffer where the SDP will be stored (must be allocated by
+ * the caller)
+ * @param size the size of the buffer
+ * @return 0 if OK, AVERROR_xxx on error
+ */
+int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
+
+/**
+ * Return a positive value if the given filename has one of the given
+ * extensions, 0 otherwise.
+ *
+ * @param extensions a comma-separated list of filename extensions
+ */
+int av_match_ext(const char *filename, const char *extensions);
+
+#endif /* AVFORMAT_AVFORMAT_H */
--- /dev/null
+/*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef AVFORMAT_AVIO_H
+#define AVFORMAT_AVIO_H
+
+/**
+ * @file
+ * unbuffered I/O operations
+ *
+ * @warning This file has to be considered an internal but installed
+ * header, so it should not be directly included in your projects.
+ */
+
+#include <stdint.h>
+
+#include "libavutil/common.h"
+#include "libavutil/log.h"
+
+/* unbuffered I/O */
+
+/**
+ * URL Context.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(URLContext) must not be used outside libav*.
+ */
+typedef struct URLContext {
+#if FF_API_URL_CLASS
+ const AVClass *av_class; ///< information for av_log(). Set by url_open().
+#endif
+ struct URLProtocol *prot;
+ int flags;
+ int is_streamed; /**< true if streamed (no seek possible), default = false */
+ int max_packet_size; /**< if non zero, the stream is packetized with this max packet size */
+ void *priv_data;
+ char *filename; /**< specified URL */
+ int is_connected;
+} URLContext;
+
+typedef struct URLPollEntry {
+ URLContext *handle;
+ int events;
+ int revents;
+} URLPollEntry;
+
+#define URL_RDONLY 0
+#define URL_WRONLY 1
+#define URL_RDWR 2
+
+typedef int URLInterruptCB(void);
+
+/**
+ * Create a URLContext for accessing to the resource indicated by
+ * url, and open it using the URLProtocol up.
+ *
+ * @param puc pointer to the location where, in case of success, the
+ * function puts the pointer to the created URLContext
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_open_protocol (URLContext **puc, struct URLProtocol *up,
+ const char *url, int flags);
+
+/**
+ * Create a URLContext for accessing to the resource indicated by
+ * url, but do not initiate the connection yet.
+ *
+ * @param puc pointer to the location where, in case of success, the
+ * function puts the pointer to the created URLContext
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_alloc(URLContext **h, const char *url, int flags);
+
+/**
+ * Connect an URLContext that has been allocated by url_alloc
+ */
+int url_connect(URLContext *h);
+
+/**
+ * Create an URLContext for accessing to the resource indicated by
+ * url, and open it.
+ *
+ * @param puc pointer to the location where, in case of success, the
+ * function puts the pointer to the created URLContext
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_open(URLContext **h, const char *url, int flags);
+
+/**
+ * Read up to size bytes from the resource accessed by h, and store
+ * the read bytes in buf.
+ *
+ * @return The number of bytes actually read, or a negative value
+ * corresponding to an AVERROR code in case of error. A value of zero
+ * indicates that it is not possible to read more from the accessed
+ * resource (except if the value of the size argument is also zero).
+ */
+int url_read(URLContext *h, unsigned char *buf, int size);
+
+/**
+ * Read as many bytes as possible (up to size), calling the
+ * read function multiple times if necessary.
+ * Will also retry if the read function returns AVERROR(EAGAIN).
+ * This makes special short-read handling in applications
+ * unnecessary, if the return value is < size then it is
+ * certain there was either an error or the end of file was reached.
+ */
+int url_read_complete(URLContext *h, unsigned char *buf, int size);
+
+/**
+ * Write size bytes from buf to the resource accessed by h.
+ *
+ * @return the number of bytes actually written, or a negative value
+ * corresponding to an AVERROR code in case of failure
+ */
+int url_write(URLContext *h, const unsigned char *buf, int size);
+
+/**
+ * Passing this as the "whence" parameter to a seek function causes it to
+ * return the filesize without seeking anywhere. Supporting this is optional.
+ * If it is not supported then the seek function will return <0.
+ */
+#define AVSEEK_SIZE 0x10000
+
+/**
+ * Change the position that will be used by the next read/write
+ * operation on the resource accessed by h.
+ *
+ * @param pos specifies the new position to set
+ * @param whence specifies how pos should be interpreted, it must be
+ * one of SEEK_SET (seek from the beginning), SEEK_CUR (seek from the
+ * current position), SEEK_END (seek from the end), or AVSEEK_SIZE
+ * (return the filesize of the requested resource, pos is ignored).
+ * @return a negative value corresponding to an AVERROR code in case
+ * of failure, or the resulting file position, measured in bytes from
+ * the beginning of the file. You can use this feature together with
+ * SEEK_CUR to read the current file position.
+ */
+int64_t url_seek(URLContext *h, int64_t pos, int whence);
+
+/**
+ * Close the resource accessed by the URLContext h, and free the
+ * memory used by it.
+ *
+ * @return a negative value if an error condition occurred, 0
+ * otherwise
+ */
+int url_close(URLContext *h);
+
+/**
+ * Return a non-zero value if the resource indicated by url
+ * exists, 0 otherwise.
+ */
+int url_exist(const char *url);
+
+/**
+ * Return the filesize of the resource accessed by h, AVERROR(ENOSYS)
+ * if the operation is not supported by h, or another negative value
+ * corresponding to an AVERROR error code in case of failure.
+ */
+int64_t url_filesize(URLContext *h);
+
+/**
+ * Return the file descriptor associated with this URL. For RTP, this
+ * will return only the RTP file descriptor, not the RTCP file descriptor.
+ *
+ * @return the file descriptor associated with this URL, or <0 on error.
+ */
+int url_get_file_handle(URLContext *h);
+
+/**
+ * Return the maximum packet size associated to packetized file
+ * handle. If the file is not packetized (stream like HTTP or file on
+ * disk), then 0 is returned.
+ *
+ * @param h file handle
+ * @return maximum packet size in bytes
+ */
+int url_get_max_packet_size(URLContext *h);
+
+/**
+ * Copy the filename of the resource accessed by h to buf.
+ *
+ * @param buf_size size in bytes of buf
+ */
+void url_get_filename(URLContext *h, char *buf, int buf_size);
+
+/**
+ * The callback is called in blocking functions to test regulary if
+ * asynchronous interruption is needed. AVERROR(EINTR) is returned
+ * in this case by the interrupted function. 'NULL' means no interrupt
+ * callback is given.
+ */
+void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
+
+/* not implemented */
+int url_poll(URLPollEntry *poll_table, int n, int timeout);
+
+/**
+ * Pause and resume playing - only meaningful if using a network streaming
+ * protocol (e.g. MMS).
+ * @param pause 1 for pause, 0 for resume
+ */
+int av_url_read_pause(URLContext *h, int pause);
+
+/**
+ * Seek to a given timestamp relative to some component stream.
+ * Only meaningful if using a network streaming protocol (e.g. MMS.).
+ * @param stream_index The stream index that the timestamp is relative to.
+ * If stream_index is (-1) the timestamp should be in AV_TIME_BASE
+ * units from the beginning of the presentation.
+ * If a stream_index >= 0 is used and the protocol does not support
+ * seeking based on component streams, the call will fail with ENOTSUP.
+ * @param timestamp timestamp in AVStream.time_base units
+ * or if there is no stream specified then in AV_TIME_BASE units.
+ * @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE
+ * and AVSEEK_FLAG_ANY. The protocol may silently ignore
+ * AVSEEK_FLAG_BACKWARD and AVSEEK_FLAG_ANY, but AVSEEK_FLAG_BYTE will
+ * fail with ENOTSUP if used and not supported.
+ * @return >= 0 on success
+ * @see AVInputFormat::read_seek
+ */
+int64_t av_url_read_seek(URLContext *h, int stream_index,
+ int64_t timestamp, int flags);
+
+/**
+ * Oring this flag as into the "whence" parameter to a seek function causes it to
+ * seek by any means (like reopening and linear reading) or other normally unreasonble
+ * means that can be extreemly slow.
+ * This may be ignored by the seek code.
+ */
+#define AVSEEK_FORCE 0x20000
+
+typedef struct URLProtocol {
+ const char *name;
+ int (*url_open)(URLContext *h, const char *url, int flags);
+ int (*url_read)(URLContext *h, unsigned char *buf, int size);
+ int (*url_write)(URLContext *h, const unsigned char *buf, int size);
+ int64_t (*url_seek)(URLContext *h, int64_t pos, int whence);
+ int (*url_close)(URLContext *h);
+ struct URLProtocol *next;
+ int (*url_read_pause)(URLContext *h, int pause);
+ int64_t (*url_read_seek)(URLContext *h, int stream_index,
+ int64_t timestamp, int flags);
+ int (*url_get_file_handle)(URLContext *h);
+ int priv_data_size;
+ const AVClass *priv_data_class;
+} URLProtocol;
+
+#if FF_API_REGISTER_PROTOCOL
+extern URLProtocol *first_protocol;
+#endif
+
+extern URLInterruptCB *url_interrupt_cb;
+
+/**
+ * If protocol is NULL, returns the first registered protocol,
+ * if protocol is non-NULL, returns the next registered protocol after protocol,
+ * or NULL if protocol is the last one.
+ */
+URLProtocol *av_protocol_next(URLProtocol *p);
+
+#if FF_API_REGISTER_PROTOCOL
+/**
+ * @deprecated Use av_register_protocol() instead.
+ */
+attribute_deprecated int register_protocol(URLProtocol *protocol);
+
+/**
+ * @deprecated Use av_register_protocol2() instead.
+ */
+attribute_deprecated int av_register_protocol(URLProtocol *protocol);
+#endif
+
+/**
+ * Register the URLProtocol protocol.
+ *
+ * @param size the size of the URLProtocol struct referenced
+ */
+int av_register_protocol2(URLProtocol *protocol, int size);
+
+/**
+ * Bytestream IO Context.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(ByteIOContext) must not be used outside libav*.
+ */
+typedef struct {
+ unsigned char *buffer;
+ int buffer_size;
+ unsigned char *buf_ptr, *buf_end;
+ void *opaque;
+ int (*read_packet)(void *opaque, uint8_t *buf, int buf_size);
+ int (*write_packet)(void *opaque, uint8_t *buf, int buf_size);
+ int64_t (*seek)(void *opaque, int64_t offset, int whence);
+ int64_t pos; /**< position in the file of the current buffer */
+ int must_flush; /**< true if the next seek should flush */
+ int eof_reached; /**< true if eof reached */
+ int write_flag; /**< true if open for writing */
+ int is_streamed;
+ int max_packet_size;
+ unsigned long checksum;
+ unsigned char *checksum_ptr;
+ unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size);
+ int error; ///< contains the error code or 0 if no error happened
+ int (*read_pause)(void *opaque, int pause);
+ int64_t (*read_seek)(void *opaque, int stream_index,
+ int64_t timestamp, int flags);
+} ByteIOContext;
+
+int init_put_byte(ByteIOContext *s,
+ unsigned char *buffer,
+ int buffer_size,
+ int write_flag,
+ void *opaque,
+ int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
+ int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
+ int64_t (*seek)(void *opaque, int64_t offset, int whence));
+ByteIOContext *av_alloc_put_byte(
+ unsigned char *buffer,
+ int buffer_size,
+ int write_flag,
+ void *opaque,
+ int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
+ int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
+ int64_t (*seek)(void *opaque, int64_t offset, int whence));
+
+void put_byte(ByteIOContext *s, int b);
+void put_nbyte(ByteIOContext *s, int b, int count);
+void put_buffer(ByteIOContext *s, const unsigned char *buf, int size);
+void put_le64(ByteIOContext *s, uint64_t val);
+void put_be64(ByteIOContext *s, uint64_t val);
+void put_le32(ByteIOContext *s, unsigned int val);
+void put_be32(ByteIOContext *s, unsigned int val);
+void put_le24(ByteIOContext *s, unsigned int val);
+void put_be24(ByteIOContext *s, unsigned int val);
+void put_le16(ByteIOContext *s, unsigned int val);
+void put_be16(ByteIOContext *s, unsigned int val);
+void put_tag(ByteIOContext *s, const char *tag);
+
+void put_strz(ByteIOContext *s, const char *buf);
+
+/**
+ * fseek() equivalent for ByteIOContext.
+ * @return new position or AVERROR.
+ */
+int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence);
+
+/**
+ * Skip given number of bytes forward.
+ * @param offset number of bytes
+ * @return 0 on success, <0 on error
+ */
+int url_fskip(ByteIOContext *s, int64_t offset);
+
+/**
+ * ftell() equivalent for ByteIOContext.
+ * @return position or AVERROR.
+ */
+int64_t url_ftell(ByteIOContext *s);
+
+/**
+ * Get the filesize.
+ * @return filesize or AVERROR
+ */
+int64_t url_fsize(ByteIOContext *s);
+
+/**
+ * feof() equivalent for ByteIOContext.
+ * @return non zero if and only if end of file
+ */
+int url_feof(ByteIOContext *s);
+
+int url_ferror(ByteIOContext *s);
+
+int av_url_read_fpause(ByteIOContext *h, int pause);
+int64_t av_url_read_fseek(ByteIOContext *h, int stream_index,
+ int64_t timestamp, int flags);
+
+#define URL_EOF (-1)
+/** @note return URL_EOF (-1) if EOF */
+int url_fgetc(ByteIOContext *s);
+
+/** @warning currently size is limited */
+#ifdef __GNUC__
+int url_fprintf(ByteIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+#else
+int url_fprintf(ByteIOContext *s, const char *fmt, ...);
+#endif
+
+/** @note unlike fgets, the EOL character is not returned and a whole
+ line is parsed. return NULL if first char read was EOF */
+char *url_fgets(ByteIOContext *s, char *buf, int buf_size);
+
+void put_flush_packet(ByteIOContext *s);
+
+
+/**
+ * Read size bytes from ByteIOContext into buf.
+ * @return number of bytes read or AVERROR
+ */
+int get_buffer(ByteIOContext *s, unsigned char *buf, int size);
+
+/**
+ * Read size bytes from ByteIOContext into buf.
+ * This reads at most 1 packet. If that is not enough fewer bytes will be
+ * returned.
+ * @return number of bytes read or AVERROR
+ */
+int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size);
+
+/** @note return 0 if EOF, so you cannot use it if EOF handling is
+ necessary */
+int get_byte(ByteIOContext *s);
+unsigned int get_le24(ByteIOContext *s);
+unsigned int get_le32(ByteIOContext *s);
+uint64_t get_le64(ByteIOContext *s);
+unsigned int get_le16(ByteIOContext *s);
+
+char *get_strz(ByteIOContext *s, char *buf, int maxlen);
+unsigned int get_be16(ByteIOContext *s);
+unsigned int get_be24(ByteIOContext *s);
+unsigned int get_be32(ByteIOContext *s);
+uint64_t get_be64(ByteIOContext *s);
+
+uint64_t ff_get_v(ByteIOContext *bc);
+
+static inline int url_is_streamed(ByteIOContext *s)
+{
+ return s->is_streamed;
+}
+
+/**
+ * Create and initialize a ByteIOContext for accessing the
+ * resource referenced by the URLContext h.
+ * @note When the URLContext h has been opened in read+write mode, the
+ * ByteIOContext can be used only for writing.
+ *
+ * @param s Used to return the pointer to the created ByteIOContext.
+ * In case of failure the pointed to value is set to NULL.
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_fdopen(ByteIOContext **s, URLContext *h);
+
+/** @warning must be called before any I/O */
+int url_setbufsize(ByteIOContext *s, int buf_size);
+#if FF_API_URL_RESETBUF
+/** Reset the buffer for reading or writing.
+ * @note Will drop any data currently in the buffer without transmitting it.
+ * @param flags URL_RDONLY to set up the buffer for reading, or URL_WRONLY
+ * to set up the buffer for writing. */
+int url_resetbuf(ByteIOContext *s, int flags);
+#endif
+
+/**
+ * Rewind the ByteIOContext using the specified buffer containing the first buf_size bytes of the file.
+ * Used after probing to avoid seeking.
+ * Joins buf and s->buffer, taking any overlap into consideration.
+ * @note s->buffer must overlap with buf or they can't be joined and the function fails
+ * @note This function is NOT part of the public API
+ *
+ * @param s The read-only ByteIOContext to rewind
+ * @param buf The probe buffer containing the first buf_size bytes of the file
+ * @param buf_size The size of buf
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int ff_rewind_with_probe_data(ByteIOContext *s, unsigned char *buf, int buf_size);
+
+/**
+ * Create and initialize a ByteIOContext for accessing the
+ * resource indicated by url.
+ * @note When the resource indicated by url has been opened in
+ * read+write mode, the ByteIOContext can be used only for writing.
+ *
+ * @param s Used to return the pointer to the created ByteIOContext.
+ * In case of failure the pointed to value is set to NULL.
+ * @param flags flags which control how the resource indicated by url
+ * is to be opened
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code in case of failure
+ */
+int url_fopen(ByteIOContext **s, const char *url, int flags);
+
+int url_fclose(ByteIOContext *s);
+URLContext *url_fileno(ByteIOContext *s);
+
+/**
+ * Return the maximum packet size associated to packetized buffered file
+ * handle. If the file is not packetized (stream like http or file on
+ * disk), then 0 is returned.
+ *
+ * @param s buffered file handle
+ * @return maximum packet size in bytes
+ */
+int url_fget_max_packet_size(ByteIOContext *s);
+
+int url_open_buf(ByteIOContext **s, uint8_t *buf, int buf_size, int flags);
+
+/** return the written or read size */
+int url_close_buf(ByteIOContext *s);
+
+/**
+ * Open a write only memory stream.
+ *
+ * @param s new IO context
+ * @return zero if no error.
+ */
+int url_open_dyn_buf(ByteIOContext **s);
+
+/**
+ * Open a write only packetized memory stream with a maximum packet
+ * size of 'max_packet_size'. The stream is stored in a memory buffer
+ * with a big endian 4 byte header giving the packet size in bytes.
+ *
+ * @param s new IO context
+ * @param max_packet_size maximum packet size (must be > 0)
+ * @return zero if no error.
+ */
+int url_open_dyn_packet_buf(ByteIOContext **s, int max_packet_size);
+
+/**
+ * Return the written size and a pointer to the buffer. The buffer
+ * must be freed with av_free(). If the buffer is opened with
+ * url_open_dyn_buf, then padding of FF_INPUT_BUFFER_PADDING_SIZE is
+ * added; if opened with url_open_dyn_packet_buf, no padding is added.
+ *
+ * @param s IO context
+ * @param pbuffer pointer to a byte buffer
+ * @return the length of the byte buffer
+ */
+int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer);
+
+unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
+ unsigned int len);
+unsigned long get_checksum(ByteIOContext *s);
+void init_checksum(ByteIOContext *s,
+ unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
+ unsigned long checksum);
+
+/* udp.c */
+int udp_set_remote_url(URLContext *h, const char *uri);
+int udp_get_local_port(URLContext *h);
+#if FF_API_UDP_GET_FILE
+int udp_get_file_handle(URLContext *h);
+#endif
+
+#endif /* AVFORMAT_AVIO_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ADLER32_H
+#define AVUTIL_ADLER32_H
+
+#include <stdint.h>
+#include "attributes.h"
+
+/**
+ * Calculate the Adler32 checksum of a buffer.
+ *
+ * Passing the return value to a subsequent av_adler32_update() call
+ * allows the checksum of multiple buffers to be calculated as though
+ * they were concatenated.
+ *
+ * @param adler initial checksum value
+ * @param buf pointer to input buffer
+ * @param len size of input buffer
+ * @return updated checksum
+ */
+unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
+ unsigned int len) av_pure;
+
+#endif /* AVUTIL_ADLER32_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Macro definitions for various function/variable attributes
+ */
+
+#ifndef AVUTIL_ATTRIBUTES_H
+#define AVUTIL_ATTRIBUTES_H
+
+#ifdef __GNUC__
+# define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y)
+#else
+# define AV_GCC_VERSION_AT_LEAST(x,y) 0
+#endif
+
+#ifndef av_always_inline
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+# define av_always_inline __attribute__((always_inline)) inline
+#else
+# define av_always_inline inline
+#endif
+#endif
+
+#ifndef av_noinline
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+# define av_noinline __attribute__((noinline))
+#else
+# define av_noinline
+#endif
+#endif
+
+#ifndef av_pure
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+# define av_pure __attribute__((pure))
+#else
+# define av_pure
+#endif
+#endif
+
+#ifndef av_const
+#if AV_GCC_VERSION_AT_LEAST(2,6)
+# define av_const __attribute__((const))
+#else
+# define av_const
+#endif
+#endif
+
+#ifndef av_cold
+#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,3)
+# define av_cold __attribute__((cold))
+#else
+# define av_cold
+#endif
+#endif
+
+#ifndef av_flatten
+#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,1)
+# define av_flatten __attribute__((flatten))
+#else
+# define av_flatten
+#endif
+#endif
+
+#ifndef attribute_deprecated
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+# define attribute_deprecated __attribute__((deprecated))
+#else
+# define attribute_deprecated
+#endif
+#endif
+
+#ifndef av_unused
+#if defined(__GNUC__)
+# define av_unused __attribute__((unused))
+#else
+# define av_unused
+#endif
+#endif
+
+#ifndef av_alias
+#if (!defined(__ICC) || __ICC > 1200) && AV_GCC_VERSION_AT_LEAST(3,3)
+# define av_alias __attribute__((may_alias))
+#else
+# define av_alias
+#endif
+#endif
+
+#ifndef av_uninit
+#if defined(__GNUC__) && !defined(__ICC)
+# define av_uninit(x) x=x
+#else
+# define av_uninit(x) x
+#endif
+#endif
+
+#ifdef __GNUC__
+# define av_builtin_constant_p __builtin_constant_p
+#else
+# define av_builtin_constant_p(x) 0
+#endif
+
+#endif /* AVUTIL_ATTRIBUTES_H */
--- /dev/null
+/*
+ * copyright (c) 2010 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * simple assert() macros that are a bit more flexible than ISO C assert().
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef AVUTIL_AVASSERT_H
+#define AVUTIL_AVASSERT_H
+
+#include <stdlib.h>
+#include "avutil.h"
+#include "log.h"
+
+/**
+ * assert() equivalent, that is always enabled.
+ */
+#define av_assert0(cond) do { \
+ if (!(cond)) { \
+ av_log(NULL, AV_LOG_FATAL, "Assertion %s failed at %s:%d\n", \
+ AV_STRINGIFY(cond), __FILE__, __LINE__); \
+ abort(); \
+ } \
+} while (0)
+
+
+/**
+ * assert() equivalent, that does not lie in speed critical code.
+ * These asserts() thus can be enabled without fearing speedloss.
+ */
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 0
+#define av_assert1(cond) av_assert0(cond)
+#else
+#define av_assert1(cond) ((void)0)
+#endif
+
+
+/**
+ * assert() equivalent, that does lie in speed critical code.
+ */
+#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1
+#define av_assert2(cond) av_assert0(cond)
+#else
+#define av_assert2(cond) ((void)0)
+#endif
+
+#endif
--- /dev/null
+/* Generated by ffconf */
+#ifndef AVUTIL_AVCONFIG_H
+#define AVUTIL_AVCONFIG_H
+#define AV_HAVE_BIGENDIAN 0
+#define AV_HAVE_FAST_UNALIGNED 1
+#endif /* AVUTIL_AVCONFIG_H */
--- /dev/null
+/*
+ * Copyright (c) 2007 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVSTRING_H
+#define AVUTIL_AVSTRING_H
+
+#include <stddef.h>
+
+/**
+ * Return non-zero if pfx is a prefix of str. If it is, *ptr is set to
+ * the address of the first character in str after the prefix.
+ *
+ * @param str input string
+ * @param pfx prefix to test
+ * @param ptr updated if the prefix is matched inside str
+ * @return non-zero if the prefix matches, zero otherwise
+ */
+int av_strstart(const char *str, const char *pfx, const char **ptr);
+
+/**
+ * Return non-zero if pfx is a prefix of str independent of case. If
+ * it is, *ptr is set to the address of the first character in str
+ * after the prefix.
+ *
+ * @param str input string
+ * @param pfx prefix to test
+ * @param ptr updated if the prefix is matched inside str
+ * @return non-zero if the prefix matches, zero otherwise
+ */
+int av_stristart(const char *str, const char *pfx, const char **ptr);
+
+/**
+ * Locate the first case-independent occurrence in the string haystack
+ * of the string needle. A zero-length string needle is considered to
+ * match at the start of haystack.
+ *
+ * This function is a case-insensitive version of the standard strstr().
+ *
+ * @param haystack string to search in
+ * @param needle string to search for
+ * @return pointer to the located match within haystack
+ * or a null pointer if no match
+ */
+char *av_stristr(const char *haystack, const char *needle);
+
+/**
+ * Copy the string src to dst, but no more than size - 1 bytes, and
+ * null-terminate dst.
+ *
+ * This function is the same as BSD strlcpy().
+ *
+ * @param dst destination buffer
+ * @param src source string
+ * @param size size of destination buffer
+ * @return the length of src
+ *
+ * WARNING: since the return value is the length of src, src absolutely
+ * _must_ be a properly 0-terminated string, otherwise this will read beyond
+ * the end of the buffer and possibly crash.
+ */
+size_t av_strlcpy(char *dst, const char *src, size_t size);
+
+/**
+ * Append the string src to the string dst, but to a total length of
+ * no more than size - 1 bytes, and null-terminate dst.
+ *
+ * This function is similar to BSD strlcat(), but differs when
+ * size <= strlen(dst).
+ *
+ * @param dst destination buffer
+ * @param src source string
+ * @param size size of destination buffer
+ * @return the total length of src and dst
+ *
+ * WARNING: since the return value use the length of src and dst, these absolutely
+ * _must_ be a properly 0-terminated strings, otherwise this will read beyond
+ * the end of the buffer and possibly crash.
+ */
+size_t av_strlcat(char *dst, const char *src, size_t size);
+
+/**
+ * Append output to a string, according to a format. Never write out of
+ * the destination buffer, and always put a terminating 0 within
+ * the buffer.
+ * @param dst destination buffer (string to which the output is
+ * appended)
+ * @param size total size of the destination buffer
+ * @param fmt printf-compatible format string, specifying how the
+ * following parameters are used
+ * @return the length of the string that would have been generated
+ * if enough space had been available
+ */
+size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...);
+
+/**
+ * Convert a number to a av_malloced string.
+ */
+char *av_d2str(double d);
+
+/**
+ * Unescape the given string until a non escaped terminating char,
+ * and return the token corresponding to the unescaped string.
+ *
+ * The normal \ and ' escaping is supported. Leading and trailing
+ * whitespaces are removed, unless they are escaped with '\' or are
+ * enclosed between ''.
+ *
+ * @param buf the buffer to parse, buf will be updated to point to the
+ * terminating char
+ * @param term a 0-terminated list of terminating chars
+ * @return the malloced unescaped string, which must be av_freed by
+ * the user, NULL in case of allocation failure
+ */
+char *av_get_token(const char **buf, const char *term);
+
+#endif /* AVUTIL_AVSTRING_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVUTIL_H
+#define AVUTIL_AVUTIL_H
+
+/**
+ * @file
+ * external API header
+ */
+
+
+#define AV_STRINGIFY(s) AV_TOSTRING(s)
+#define AV_TOSTRING(s) #s
+
+#define AV_GLUE(a, b) a ## b
+#define AV_JOIN(a, b) AV_GLUE(a, b)
+
+#define AV_PRAGMA(s) _Pragma(#s)
+
+#define AV_VERSION_INT(a, b, c) (a<<16 | b<<8 | c)
+#define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
+#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
+
+#define LIBAVUTIL_VERSION_MAJOR 50
+#define LIBAVUTIL_VERSION_MINOR 36
+#define LIBAVUTIL_VERSION_MICRO 0
+
+#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
+ LIBAVUTIL_VERSION_MINOR, \
+ LIBAVUTIL_VERSION_MICRO)
+#define LIBAVUTIL_VERSION AV_VERSION(LIBAVUTIL_VERSION_MAJOR, \
+ LIBAVUTIL_VERSION_MINOR, \
+ LIBAVUTIL_VERSION_MICRO)
+#define LIBAVUTIL_BUILD LIBAVUTIL_VERSION_INT
+
+#define LIBAVUTIL_IDENT "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
+
+/**
+ * Those FF_API_* defines are not part of public API.
+ * They may change, break or disappear at any time.
+ */
+#ifndef FF_API_OLD_EVAL_NAMES
+#define FF_API_OLD_EVAL_NAMES (LIBAVUTIL_VERSION_MAJOR < 51)
+#endif
+
+/**
+ * Return the LIBAVUTIL_VERSION_INT constant.
+ */
+unsigned avutil_version(void);
+
+/**
+ * Return the libavutil build-time configuration.
+ */
+const char *avutil_configuration(void);
+
+/**
+ * Return the libavutil license.
+ */
+const char *avutil_license(void);
+
+enum AVMediaType {
+ AVMEDIA_TYPE_UNKNOWN = -1,
+ AVMEDIA_TYPE_VIDEO,
+ AVMEDIA_TYPE_AUDIO,
+ AVMEDIA_TYPE_DATA,
+ AVMEDIA_TYPE_SUBTITLE,
+ AVMEDIA_TYPE_ATTACHMENT,
+ AVMEDIA_TYPE_NB
+};
+
+#define FF_LAMBDA_SHIFT 7
+#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
+#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
+#define FF_LAMBDA_MAX (256*128-1)
+
+#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
+
+#include "common.h"
+#include "error.h"
+#include "mathematics.h"
+#include "rational.h"
+#include "intfloat_readwrite.h"
+#include "log.h"
+#include "pixfmt.h"
+
+#endif /* AVUTIL_AVUTIL_H */
--- /dev/null
+/*
+ * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_BASE64_H
+#define AVUTIL_BASE64_H
+
+#include <stdint.h>
+
+/**
+ * Decode a base64-encoded string.
+ *
+ * @param out buffer for decoded data
+ * @param in null-terminated input string
+ * @param out_size size in bytes of the out buffer, must be at
+ * least 3/4 of the length of in
+ * @return number of bytes written, or a negative value in case of
+ * invalid input
+ */
+int av_base64_decode(uint8_t *out, const char *in, int out_size);
+
+/**
+ * Encode data to base64 and null-terminate.
+ *
+ * @param out buffer for encoded data
+ * @param out_size size in bytes of the output buffer, must be at
+ * least AV_BASE64_SIZE(in_size)
+ * @param in_size size in bytes of the 'in' buffer
+ * @return 'out' or NULL in case of error
+ */
+char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);
+
+/**
+ * Calculate the output size needed to base64-encode x bytes.
+ */
+#define AV_BASE64_SIZE(x) (((x)+2) / 3 * 4 + 1)
+
+#endif /* AVUTIL_BASE64_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * byte swapping routines
+ */
+
+#ifndef AVUTIL_BSWAP_H
+#define AVUTIL_BSWAP_H
+
+#include <stdint.h>
+#include "libavutil/avconfig.h"
+#include "attributes.h"
+
+#ifdef HAVE_AV_CONFIG_H
+
+#include "config.h"
+
+#if ARCH_ARM
+# include "arm/bswap.h"
+#elif ARCH_AVR32
+# include "avr32/bswap.h"
+#elif ARCH_BFIN
+# include "bfin/bswap.h"
+#elif ARCH_SH4
+# include "sh4/bswap.h"
+#elif ARCH_X86
+# include "x86/bswap.h"
+#endif
+
+#endif /* HAVE_AV_CONFIG_H */
+
+#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))
+#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
+#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
+
+#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
+
+#ifndef av_bswap16
+static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
+{
+ x= (x>>8) | (x<<8);
+ return x;
+}
+#endif
+
+#ifndef av_bswap32
+static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
+{
+ x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
+ x= (x>>16) | (x<<16);
+ return x;
+}
+#endif
+
+#ifndef av_bswap64
+static inline uint64_t av_const av_bswap64(uint64_t x)
+{
+#if 0
+ x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
+ x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL);
+ return (x>>32) | (x<<32);
+#else
+ union {
+ uint64_t ll;
+ uint32_t l[2];
+ } w, r;
+ w.ll = x;
+ r.l[0] = av_bswap32 (w.l[1]);
+ r.l[1] = av_bswap32 (w.l[0]);
+ return r.ll;
+#endif
+}
+#endif
+
+// be2ne ... big-endian to native-endian
+// le2ne ... little-endian to native-endian
+
+#if AV_HAVE_BIGENDIAN
+#define av_be2ne16(x) (x)
+#define av_be2ne32(x) (x)
+#define av_be2ne64(x) (x)
+#define av_le2ne16(x) av_bswap16(x)
+#define av_le2ne32(x) av_bswap32(x)
+#define av_le2ne64(x) av_bswap64(x)
+#define AV_BE2NEC(s, x) (x)
+#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
+#else
+#define av_be2ne16(x) av_bswap16(x)
+#define av_be2ne32(x) av_bswap32(x)
+#define av_be2ne64(x) av_bswap64(x)
+#define av_le2ne16(x) (x)
+#define av_le2ne32(x) (x)
+#define av_le2ne64(x) (x)
+#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
+#define AV_LE2NEC(s, x) (x)
+#endif
+
+#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
+#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
+#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
+#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
+#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
+#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
+
+#endif /* AVUTIL_BSWAP_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * common internal and external API header
+ */
+
+#ifndef AVUTIL_COMMON_H
+#define AVUTIL_COMMON_H
+
+#include <ctype.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "attributes.h"
+#include "libavutil/avconfig.h"
+
+#if AV_HAVE_BIGENDIAN
+# define AV_NE(be, le) (be)
+#else
+# define AV_NE(be, le) (le)
+#endif
+
+//rounded division & shift
+#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
+/* assume b>0 */
+#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
+#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
+#define FFSIGN(a) ((a) > 0 ? 1 : -1)
+
+#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
+#define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
+#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
+#define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
+
+#define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
+#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
+#define FFALIGN(x, a) (((x)+(a)-1)&~((a)-1))
+
+/* misc math functions */
+extern const uint8_t ff_log2_tab[256];
+
+extern const uint8_t av_reverse[256];
+
+static inline av_const int av_log2_c(unsigned int v)
+{
+ int n = 0;
+ if (v & 0xffff0000) {
+ v >>= 16;
+ n += 16;
+ }
+ if (v & 0xff00) {
+ v >>= 8;
+ n += 8;
+ }
+ n += ff_log2_tab[v];
+
+ return n;
+}
+
+static inline av_const int av_log2_16bit_c(unsigned int v)
+{
+ int n = 0;
+ if (v & 0xff00) {
+ v >>= 8;
+ n += 8;
+ }
+ n += ff_log2_tab[v];
+
+ return n;
+}
+
+#ifdef HAVE_AV_CONFIG_H
+# include "config.h"
+# include "intmath.h"
+#endif
+
+/* Pull in unguarded fallback defines at the end of this file. */
+#include "common.h"
+
+/**
+ * Clip a signed integer value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static inline av_const int av_clip_c(int a, int amin, int amax)
+{
+ if (a < amin) return amin;
+ else if (a > amax) return amax;
+ else return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-255 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static inline av_const uint8_t av_clip_uint8_c(int a)
+{
+ if (a&(~0xFF)) return (-a)>>31;
+ else return a;
+}
+
+/**
+ * Clip a signed integer value into the -128,127 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static inline av_const int8_t av_clip_int8_c(int a)
+{
+ if ((a+0x80) & ~0xFF) return (a>>31) ^ 0x7F;
+ else return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-65535 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static inline av_const uint16_t av_clip_uint16_c(int a)
+{
+ if (a&(~0xFFFF)) return (-a)>>31;
+ else return a;
+}
+
+/**
+ * Clip a signed integer value into the -32768,32767 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static inline av_const int16_t av_clip_int16_c(int a)
+{
+ if ((a+0x8000) & ~0xFFFF) return (a>>31) ^ 0x7FFF;
+ else return a;
+}
+
+/**
+ * Clip a signed 64-bit integer value into the -2147483648,2147483647 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static inline av_const int32_t av_clipl_int32_c(int64_t a)
+{
+ if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF)) return (a>>63) ^ 0x7FFFFFFF;
+ else return a;
+}
+
+/**
+ * Clip a float value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static inline av_const float av_clipf_c(float a, float amin, float amax)
+{
+ if (a < amin) return amin;
+ else if (a > amax) return amax;
+ else return a;
+}
+
+/** Compute ceil(log2(x)).
+ * @param x value used to compute ceil(log2(x))
+ * @return computed ceiling of log2(x)
+ */
+static inline av_const int av_ceil_log2_c(int x)
+{
+ return av_log2((x - 1) << 1);
+}
+
+/**
+ * Count number of bits set to one in x
+ * @param x value to count bits of
+ * @return the number of bits set to one in x
+ */
+static inline av_const int av_popcount_c(uint32_t x)
+{
+ x -= (x >> 1) & 0x55555555;
+ x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
+ x = (x + (x >> 4)) & 0x0F0F0F0F;
+ x += x >> 8;
+ return (x + (x >> 16)) & 0x3F;
+}
+
+#define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
+#define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((a) << 24))
+
+/**
+ * Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val Output value, must be an lvalue of type uint32_t.
+ * @param GET_BYTE Expression reading one byte from the input.
+ * Evaluated up to 7 times (4 for the currently
+ * assigned Unicode range). With a memory buffer
+ * input, this could be *ptr++.
+ * @param ERROR Expression to be evaluated on invalid input,
+ * typically a goto statement.
+ */
+#define GET_UTF8(val, GET_BYTE, ERROR)\
+ val= GET_BYTE;\
+ {\
+ int ones= 7 - av_log2(val ^ 255);\
+ if(ones==1)\
+ ERROR\
+ val&= 127>>ones;\
+ while(--ones > 0){\
+ int tmp= GET_BYTE - 128;\
+ if(tmp>>6)\
+ ERROR\
+ val= (val<<6) + tmp;\
+ }\
+ }
+
+/**
+ * Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val Output value, must be an lvalue of type uint32_t.
+ * @param GET_16BIT Expression returning two bytes of UTF-16 data converted
+ * to native byte order. Evaluated one or two times.
+ * @param ERROR Expression to be evaluated on invalid input,
+ * typically a goto statement.
+ */
+#define GET_UTF16(val, GET_16BIT, ERROR)\
+ val = GET_16BIT;\
+ {\
+ unsigned int hi = val - 0xD800;\
+ if (hi < 0x800) {\
+ val = GET_16BIT - 0xDC00;\
+ if (val > 0x3FFU || hi > 0x3FFU)\
+ ERROR\
+ val += (hi<<10) + 0x10000;\
+ }\
+ }\
+
+/*!
+ * \def PUT_UTF8(val, tmp, PUT_BYTE)
+ * Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
+ * \param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
+ * val is given as a function it is executed only once.
+ * \param tmp is a temporary variable and should be of type uint8_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_BYTE.
+ * \param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
+ * It could be a function or a statement, and uses tmp as the input byte.
+ * For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
+ * executed up to 4 times for values in the valid UTF-8 range and up to
+ * 7 times in the general case, depending on the length of the converted
+ * Unicode character.
+ */
+#define PUT_UTF8(val, tmp, PUT_BYTE)\
+ {\
+ int bytes, shift;\
+ uint32_t in = val;\
+ if (in < 0x80) {\
+ tmp = in;\
+ PUT_BYTE\
+ } else {\
+ bytes = (av_log2(in) + 4) / 5;\
+ shift = (bytes - 1) * 6;\
+ tmp = (256 - (256 >> bytes)) | (in >> shift);\
+ PUT_BYTE\
+ while (shift >= 6) {\
+ shift -= 6;\
+ tmp = 0x80 | ((in >> shift) & 0x3f);\
+ PUT_BYTE\
+ }\
+ }\
+ }
+
+/*!
+ * \def PUT_UTF16(val, tmp, PUT_16BIT)
+ * Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).
+ * \param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-16. If
+ * val is given as a function it is executed only once.
+ * \param tmp is a temporary variable and should be of type uint16_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_16BIT.
+ * \param PUT_16BIT writes the converted UTF-16 data to any proper destination
+ * in desired endianness. It could be a function or a statement, and uses tmp
+ * as the input byte. For example, PUT_BYTE could be "*output++ = tmp;"
+ * PUT_BYTE will be executed 1 or 2 times depending on input character.
+ */
+#define PUT_UTF16(val, tmp, PUT_16BIT)\
+ {\
+ uint32_t in = val;\
+ if (in < 0x10000) {\
+ tmp = in;\
+ PUT_16BIT\
+ } else {\
+ tmp = 0xD800 | ((in - 0x10000) >> 10);\
+ PUT_16BIT\
+ tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
+ PUT_16BIT\
+ }\
+ }\
+
+
+
+#include "mem.h"
+
+#ifdef HAVE_AV_CONFIG_H
+# include "internal.h"
+#endif /* HAVE_AV_CONFIG_H */
+
+#endif /* AVUTIL_COMMON_H */
+
+/*
+ * The following definitions are outside the multiple inclusion guard
+ * to ensure they are immediately available in intmath.h.
+ */
+
+#ifndef av_log2
+# define av_log2 av_log2_c
+#endif
+#ifndef av_log2_16bit
+# define av_log2_16bit av_log2_16bit_c
+#endif
+#ifndef av_ceil_log2
+# define av_ceil_log2 av_ceil_log2_c
+#endif
+#ifndef av_clip
+# define av_clip av_clip_c
+#endif
+#ifndef av_clip_uint8
+# define av_clip_uint8 av_clip_uint8_c
+#endif
+#ifndef av_clip_int8
+# define av_clip_int8 av_clip_int8_c
+#endif
+#ifndef av_clip_uint16
+# define av_clip_uint16 av_clip_uint16_c
+#endif
+#ifndef av_clip_int16
+# define av_clip_int16 av_clip_int16_c
+#endif
+#ifndef av_clipl_int32
+# define av_clipl_int32 av_clipl_int32_c
+#endif
+#ifndef av_clipf
+# define av_clipf av_clipf_c
+#endif
+#ifndef av_popcount
+# define av_popcount av_popcount_c
+#endif
--- /dev/null
+/*
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CPU_H
+#define AVUTIL_CPU_H
+
+#define AV_CPU_FLAG_FORCE 0x80000000 /* force usage of selected flags (OR) */
+
+ /* lower 16 bits - CPU features */
+#define AV_CPU_FLAG_MMX 0x0001 ///< standard MMX
+#define AV_CPU_FLAG_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
+#define AV_CPU_FLAG_3DNOW 0x0004 ///< AMD 3DNOW
+#define AV_CPU_FLAG_SSE 0x0008 ///< SSE functions
+#define AV_CPU_FLAG_SSE2 0x0010 ///< PIV SSE2 functions
+#define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
+#define AV_CPU_FLAG_3DNOWEXT 0x0020 ///< AMD 3DNowExt
+#define AV_CPU_FLAG_SSE3 0x0040 ///< Prescott SSE3 functions
+#define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
+#define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions
+#define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions
+#define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions
+#define AV_CPU_FLAG_IWMMXT 0x0100 ///< XScale IWMMXT
+#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard
+
+/**
+ * Return the flags which specify extensions supported by the CPU.
+ */
+int av_get_cpu_flags(void);
+
+/* The following CPU-specific functions shall not be called directly. */
+int ff_get_cpu_flags_arm(void);
+int ff_get_cpu_flags_ppc(void);
+int ff_get_cpu_flags_x86(void);
+
+#endif /* AVUTIL_CPU_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CRC_H
+#define AVUTIL_CRC_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include "attributes.h"
+
+typedef uint32_t AVCRC;
+
+typedef enum {
+ AV_CRC_8_ATM,
+ AV_CRC_16_ANSI,
+ AV_CRC_16_CCITT,
+ AV_CRC_32_IEEE,
+ AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */
+ AV_CRC_MAX, /*< Not part of public API! Do not use outside libavutil. */
+}AVCRCId;
+
+int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
+const AVCRC *av_crc_get_table(AVCRCId crc_id);
+uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure;
+
+#endif /* AVUTIL_CRC_H */
+
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * error code definitions
+ */
+
+#ifndef AVUTIL_ERROR_H
+#define AVUTIL_ERROR_H
+
+#include <errno.h>
+#include "avutil.h"
+
+/* error handling */
+#if EDOM > 0
+#define AVERROR(e) (-(e)) ///< Returns a negative error code from a POSIX error code, to return from library functions.
+#define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
+#else
+/* Some platforms have E* and errno already negated. */
+#define AVERROR(e) (e)
+#define AVUNERROR(e) (e)
+#endif
+
+#if LIBAVUTIL_VERSION_MAJOR < 51
+#define AVERROR_INVALIDDATA AVERROR(EINVAL) ///< Invalid data found when processing input
+#define AVERROR_IO AVERROR(EIO) ///< I/O error
+#define AVERROR_NOENT AVERROR(ENOENT) ///< No such file or directory
+#define AVERROR_NOFMT AVERROR(EILSEQ) ///< Unknown format
+#define AVERROR_NOMEM AVERROR(ENOMEM) ///< Not enough memory
+#define AVERROR_NOTSUPP AVERROR(ENOSYS) ///< Operation not supported
+#define AVERROR_NUMEXPECTED AVERROR(EDOM) ///< Number syntax expected in filename
+#define AVERROR_UNKNOWN AVERROR(EINVAL) ///< Unknown error
+#endif
+
+#define AVERROR_EOF AVERROR(EPIPE) ///< End of file
+
+#define AVERROR_PATCHWELCOME (-MKTAG('P','A','W','E')) ///< Not yet implemented in FFmpeg, patches welcome
+
+#if LIBAVUTIL_VERSION_MAJOR > 50
+#define AVERROR_INVALIDDATA (-MKTAG('I','N','D','A')) ///< Invalid data found when processing input
+#define AVERROR_NUMEXPECTED (-MKTAG('N','U','E','X')) ///< Number syntax expected in filename
+#endif
+
+#define AVERROR_DEMUXER_NOT_FOUND (-MKTAG(0xF8,'D','E','M')) ///< Demuxer not found
+#define AVERROR_MUXER_NOT_FOUND (-MKTAG(0xF8,'M','U','X')) ///< Muxer not found
+#define AVERROR_DECODER_NOT_FOUND (-MKTAG(0xF8,'D','E','C')) ///< Decoder not found
+#define AVERROR_ENCODER_NOT_FOUND (-MKTAG(0xF8,'E','N','C')) ///< Encoder not found
+#define AVERROR_PROTOCOL_NOT_FOUND (-MKTAG(0xF8,'P','R','O')) ///< Protocol not found
+#define AVERROR_FILTER_NOT_FOUND (-MKTAG(0xF8,'F','I','L')) ///< Filter not found
+#define AVERROR_BSF_NOT_FOUND (-MKTAG(0xF8,'B','S','F')) ///< Bitstream filter not found
+#define AVERROR_STREAM_NOT_FOUND (-MKTAG(0xF8,'S','T','R')) ///< Stream not found
+
+/**
+ * Put a description of the AVERROR code errnum in errbuf.
+ * In case of failure the global variable errno is set to indicate the
+ * error. Even in case of failure av_strerror() will print a generic
+ * error message indicating the errnum provided to errbuf.
+ *
+ * @param errnum error code to describe
+ * @param errbuf buffer to which description is written
+ * @param errbuf_size the size in bytes of errbuf
+ * @return 0 on success, a negative value if a description for errnum
+ * cannot be found
+ */
+int av_strerror(int errnum, char *errbuf, size_t errbuf_size);
+
+#endif /* AVUTIL_ERROR_H */
--- /dev/null
+/*
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * simple arithmetic expression evaluator
+ */
+
+#ifndef AVUTIL_EVAL_H
+#define AVUTIL_EVAL_H
+
+#include "avutil.h"
+
+typedef struct AVExpr AVExpr;
+
+/**
+ * Parse and evaluate an expression.
+ * Note, this is significantly slower than av_expr_eval().
+ *
+ * @param res a pointer to a double where is put the result value of
+ * the expression, or NAN in case of error
+ * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
+ * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
+ * @param const_values a zero terminated array of values for the identifiers from const_names
+ * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
+ * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
+ * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
+ * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
+ * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
+ * @param log_ctx parent logging context
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+int av_expr_parse_and_eval(double *res, const char *s,
+ const char * const *const_names, const double *const_values,
+ const char * const *func1_names, double (* const *funcs1)(void *, double),
+ const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+ void *opaque, int log_offset, void *log_ctx);
+
+/**
+ * Parse an expression.
+ *
+ * @param expr a pointer where is put an AVExpr containing the parsed
+ * value in case of successfull parsing, or NULL otherwise.
+ * The pointed to AVExpr must be freed with av_expr_free() by the user
+ * when it is not needed anymore.
+ * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
+ * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
+ * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
+ * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
+ * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
+ * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
+ * @param log_ctx parent logging context
+ * @return 0 in case of success, a negative value corresponding to an
+ * AVERROR code otherwise
+ */
+int av_expr_parse(AVExpr **expr, const char *s,
+ const char * const *const_names,
+ const char * const *func1_names, double (* const *funcs1)(void *, double),
+ const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+ int log_offset, void *log_ctx);
+
+/**
+ * Evaluate a previously parsed expression.
+ *
+ * @param const_values a zero terminated array of values for the identifiers from av_expr_parse() const_names
+ * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
+ * @return the value of the expression
+ */
+double av_expr_eval(AVExpr *e, const double *const_values, void *opaque);
+
+/**
+ * Free a parsed expression previously created with av_expr_parse().
+ */
+void av_expr_free(AVExpr *e);
+
+#if FF_API_OLD_EVAL_NAMES
+/**
+ * @deprecated Deprecated in favor of av_expr_parse_and_eval().
+ */
+attribute_deprecated
+int av_parse_and_eval_expr(double *res, const char *s,
+ const char * const *const_names, const double *const_values,
+ const char * const *func1_names, double (* const *funcs1)(void *, double),
+ const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+ void *opaque, int log_offset, void *log_ctx);
+
+/**
+ * @deprecated Deprecated in favor of av_expr_parse().
+ */
+attribute_deprecated
+int av_parse_expr(AVExpr **expr, const char *s,
+ const char * const *const_names,
+ const char * const *func1_names, double (* const *funcs1)(void *, double),
+ const char * const *func2_names, double (* const *funcs2)(void *, double, double),
+ int log_offset, void *log_ctx);
+/**
+ * @deprecated Deprecated in favor of av_expr_eval().
+ */
+attribute_deprecated
+double av_eval_expr(AVExpr *e, const double *const_values, void *opaque);
+
+/**
+ * @deprecated Deprecated in favor of av_expr_free().
+ */
+attribute_deprecated
+void av_free_expr(AVExpr *e);
+#endif /* FF_API_OLD_EVAL_NAMES */
+
+/**
+ * Parse the string in numstr and return its value as a double. If
+ * the string is empty, contains only whitespaces, or does not contain
+ * an initial substring that has the expected syntax for a
+ * floating-point number, no conversion is performed. In this case,
+ * returns a value of zero and the value returned in tail is the value
+ * of numstr.
+ *
+ * @param numstr a string representing a number, may contain one of
+ * the International System number postfixes, for example 'K', 'M',
+ * 'G'. If 'i' is appended after the postfix, powers of 2 are used
+ * instead of powers of 10. The 'B' postfix multiplies the value for
+ * 8, and can be appended after another postfix or used alone. This
+ * allows using for example 'KB', 'MiB', 'G' and 'B' as postfix.
+ * @param tail if non-NULL puts here the pointer to the char next
+ * after the last parsed character
+ */
+double av_strtod(const char *numstr, char **tail);
+
+#endif /* AVUTIL_EVAL_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * a very simple circular buffer FIFO implementation
+ */
+
+#ifndef AVUTIL_FIFO_H
+#define AVUTIL_FIFO_H
+
+#include <stdint.h>
+
+typedef struct AVFifoBuffer {
+ uint8_t *buffer;
+ uint8_t *rptr, *wptr, *end;
+ uint32_t rndx, wndx;
+} AVFifoBuffer;
+
+/**
+ * Initialize an AVFifoBuffer.
+ * @param size of FIFO
+ * @return AVFifoBuffer or NULL in case of memory allocation failure
+ */
+AVFifoBuffer *av_fifo_alloc(unsigned int size);
+
+/**
+ * Free an AVFifoBuffer.
+ * @param *f AVFifoBuffer to free
+ */
+void av_fifo_free(AVFifoBuffer *f);
+
+/**
+ * Reset the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied.
+ * @param *f AVFifoBuffer to reset
+ */
+void av_fifo_reset(AVFifoBuffer *f);
+
+/**
+ * Return the amount of data in bytes in the AVFifoBuffer, that is the
+ * amount of data you can read from it.
+ * @param *f AVFifoBuffer to read from
+ * @return size
+ */
+int av_fifo_size(AVFifoBuffer *f);
+
+/**
+ * Return the amount of space in bytes in the AVFifoBuffer, that is the
+ * amount of data you can write into it.
+ * @param *f AVFifoBuffer to write into
+ * @return size
+ */
+int av_fifo_space(AVFifoBuffer *f);
+
+/**
+ * Feed data from an AVFifoBuffer to a user-supplied callback.
+ * @param *f AVFifoBuffer to read from
+ * @param buf_size number of bytes to read
+ * @param *func generic read function
+ * @param *dest data destination
+ */
+int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void (*func)(void*, void*, int));
+
+/**
+ * Feed data from a user-supplied callback to an AVFifoBuffer.
+ * @param *f AVFifoBuffer to write to
+ * @param *src data source; non-const since it may be used as a
+ * modifiable context by the function defined in func
+ * @param size number of bytes to write
+ * @param *func generic write function; the first parameter is src,
+ * the second is dest_buf, the third is dest_buf_size.
+ * func must return the number of bytes written to dest_buf, or <= 0 to
+ * indicate no more data available to write.
+ * If func is NULL, src is interpreted as a simple byte array for source data.
+ * @return the number of bytes written to the FIFO
+ */
+int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int (*func)(void*, void*, int));
+
+/**
+ * Resize an AVFifoBuffer.
+ * @param *f AVFifoBuffer to resize
+ * @param size new AVFifoBuffer size in bytes
+ * @return <0 for failure, >=0 otherwise
+ */
+int av_fifo_realloc2(AVFifoBuffer *f, unsigned int size);
+
+/**
+ * Read and discard the specified amount of data from an AVFifoBuffer.
+ * @param *f AVFifoBuffer to read from
+ * @param size amount of data to read in bytes
+ */
+void av_fifo_drain(AVFifoBuffer *f, int size);
+
+static inline uint8_t av_fifo_peek(AVFifoBuffer *f, int offs)
+{
+ uint8_t *ptr = f->rptr + offs;
+ if (ptr >= f->end)
+ ptr -= f->end - f->buffer;
+ return *ptr;
+}
+#endif /* AVUTIL_FIFO_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_FILE_H
+#define AVUTIL_FILE_H
+
+#include "avutil.h"
+
+/**
+ * @file misc file utilities
+ */
+
+/**
+ * Read the file with name filename, and put its content in a newly
+ * allocated buffer or map it with mmap() when available.
+ * In case of success set *bufptr to the read or mmapped buffer, and
+ * *size to the size in bytes of the buffer in *bufptr.
+ * The returned buffer must be released with av_file_unmap().
+ *
+ * @param log_offset loglevel offset used for logging
+ * @param log_ctx context used for logging
+ * @return a non negative number in case of success, a negative value
+ * corresponding to an AVERROR error code in case of failure
+ */
+int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
+ int log_offset, void *log_ctx);
+
+/**
+ * Unmap or free the buffer bufptr created by av_file_map().
+ *
+ * @param size size in bytes of bufptr, must be the same as returned
+ * by av_file_map()
+ */
+void av_file_unmap(uint8_t *bufptr, size_t size);
+
+#endif /* AVUTIL_FILE_H */
--- /dev/null
+/*
+ * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_INTFLOAT_READWRITE_H
+#define AVUTIL_INTFLOAT_READWRITE_H
+
+#include <stdint.h>
+#include "attributes.h"
+
+/* IEEE 80 bits extended float */
+typedef struct AVExtFloat {
+ uint8_t exponent[2];
+ uint8_t mantissa[8];
+} AVExtFloat;
+
+double av_int2dbl(int64_t v) av_const;
+float av_int2flt(int32_t v) av_const;
+double av_ext2dbl(const AVExtFloat ext) av_const;
+int64_t av_dbl2int(double d) av_const;
+int32_t av_flt2int(float d) av_const;
+AVExtFloat av_dbl2ext(double d) av_const;
+
+#endif /* AVUTIL_INTFLOAT_READWRITE_H */
--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_INTREADWRITE_H
+#define AVUTIL_INTREADWRITE_H
+
+#include <stdint.h>
+#include "libavutil/avconfig.h"
+#include "attributes.h"
+#include "bswap.h"
+
+typedef union {
+ uint64_t u64;
+ uint32_t u32[2];
+ uint16_t u16[4];
+ uint8_t u8 [8];
+ double f64;
+ float f32[2];
+} av_alias av_alias64;
+
+typedef union {
+ uint32_t u32;
+ uint16_t u16[2];
+ uint8_t u8 [4];
+ float f32;
+} av_alias av_alias32;
+
+typedef union {
+ uint16_t u16;
+ uint8_t u8 [2];
+} av_alias av_alias16;
+
+/*
+ * Arch-specific headers can provide any combination of
+ * AV_[RW][BLN](16|24|32|64) and AV_(COPY|SWAP|ZERO)(64|128) macros.
+ * Preprocessor symbols must be defined, even if these are implemented
+ * as inline functions.
+ */
+
+#ifdef HAVE_AV_CONFIG_H
+
+#include "config.h"
+
+#if ARCH_ARM
+# include "arm/intreadwrite.h"
+#elif ARCH_AVR32
+# include "avr32/intreadwrite.h"
+#elif ARCH_MIPS
+# include "mips/intreadwrite.h"
+#elif ARCH_PPC
+# include "ppc/intreadwrite.h"
+#elif ARCH_TOMI
+# include "tomi/intreadwrite.h"
+#elif ARCH_X86
+# include "x86/intreadwrite.h"
+#endif
+
+#endif /* HAVE_AV_CONFIG_H */
+
+/*
+ * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
+ */
+
+#if AV_HAVE_BIGENDIAN
+
+# if defined(AV_RN16) && !defined(AV_RB16)
+# define AV_RB16(p) AV_RN16(p)
+# elif !defined(AV_RN16) && defined(AV_RB16)
+# define AV_RN16(p) AV_RB16(p)
+# endif
+
+# if defined(AV_WN16) && !defined(AV_WB16)
+# define AV_WB16(p, v) AV_WN16(p, v)
+# elif !defined(AV_WN16) && defined(AV_WB16)
+# define AV_WN16(p, v) AV_WB16(p, v)
+# endif
+
+# if defined(AV_RN24) && !defined(AV_RB24)
+# define AV_RB24(p) AV_RN24(p)
+# elif !defined(AV_RN24) && defined(AV_RB24)
+# define AV_RN24(p) AV_RB24(p)
+# endif
+
+# if defined(AV_WN24) && !defined(AV_WB24)
+# define AV_WB24(p, v) AV_WN24(p, v)
+# elif !defined(AV_WN24) && defined(AV_WB24)
+# define AV_WN24(p, v) AV_WB24(p, v)
+# endif
+
+# if defined(AV_RN32) && !defined(AV_RB32)
+# define AV_RB32(p) AV_RN32(p)
+# elif !defined(AV_RN32) && defined(AV_RB32)
+# define AV_RN32(p) AV_RB32(p)
+# endif
+
+# if defined(AV_WN32) && !defined(AV_WB32)
+# define AV_WB32(p, v) AV_WN32(p, v)
+# elif !defined(AV_WN32) && defined(AV_WB32)
+# define AV_WN32(p, v) AV_WB32(p, v)
+# endif
+
+# if defined(AV_RN64) && !defined(AV_RB64)
+# define AV_RB64(p) AV_RN64(p)
+# elif !defined(AV_RN64) && defined(AV_RB64)
+# define AV_RN64(p) AV_RB64(p)
+# endif
+
+# if defined(AV_WN64) && !defined(AV_WB64)
+# define AV_WB64(p, v) AV_WN64(p, v)
+# elif !defined(AV_WN64) && defined(AV_WB64)
+# define AV_WN64(p, v) AV_WB64(p, v)
+# endif
+
+#else /* AV_HAVE_BIGENDIAN */
+
+# if defined(AV_RN16) && !defined(AV_RL16)
+# define AV_RL16(p) AV_RN16(p)
+# elif !defined(AV_RN16) && defined(AV_RL16)
+# define AV_RN16(p) AV_RL16(p)
+# endif
+
+# if defined(AV_WN16) && !defined(AV_WL16)
+# define AV_WL16(p, v) AV_WN16(p, v)
+# elif !defined(AV_WN16) && defined(AV_WL16)
+# define AV_WN16(p, v) AV_WL16(p, v)
+# endif
+
+# if defined(AV_RN24) && !defined(AV_RL24)
+# define AV_RL24(p) AV_RN24(p)
+# elif !defined(AV_RN24) && defined(AV_RL24)
+# define AV_RN24(p) AV_RL24(p)
+# endif
+
+# if defined(AV_WN24) && !defined(AV_WL24)
+# define AV_WL24(p, v) AV_WN24(p, v)
+# elif !defined(AV_WN24) && defined(AV_WL24)
+# define AV_WN24(p, v) AV_WL24(p, v)
+# endif
+
+# if defined(AV_RN32) && !defined(AV_RL32)
+# define AV_RL32(p) AV_RN32(p)
+# elif !defined(AV_RN32) && defined(AV_RL32)
+# define AV_RN32(p) AV_RL32(p)
+# endif
+
+# if defined(AV_WN32) && !defined(AV_WL32)
+# define AV_WL32(p, v) AV_WN32(p, v)
+# elif !defined(AV_WN32) && defined(AV_WL32)
+# define AV_WN32(p, v) AV_WL32(p, v)
+# endif
+
+# if defined(AV_RN64) && !defined(AV_RL64)
+# define AV_RL64(p) AV_RN64(p)
+# elif !defined(AV_RN64) && defined(AV_RL64)
+# define AV_RN64(p) AV_RL64(p)
+# endif
+
+# if defined(AV_WN64) && !defined(AV_WL64)
+# define AV_WL64(p, v) AV_WN64(p, v)
+# elif !defined(AV_WN64) && defined(AV_WL64)
+# define AV_WN64(p, v) AV_WL64(p, v)
+# endif
+
+#endif /* !AV_HAVE_BIGENDIAN */
+
+/*
+ * Define AV_[RW]N helper macros to simplify definitions not provided
+ * by per-arch headers.
+ */
+
+#if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)
+
+union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
+union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
+union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
+
+# define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
+# define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
+
+#elif defined(__DECC)
+
+# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
+# define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
+
+#elif AV_HAVE_FAST_UNALIGNED
+
+# define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
+# define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
+
+#else
+
+#ifndef AV_RB16
+# define AV_RB16(x) \
+ ((((const uint8_t*)(x))[0] << 8) | \
+ ((const uint8_t*)(x))[1])
+#endif
+#ifndef AV_WB16
+# define AV_WB16(p, d) do { \
+ ((uint8_t*)(p))[1] = (d); \
+ ((uint8_t*)(p))[0] = (d)>>8; \
+ } while(0)
+#endif
+
+#ifndef AV_RL16
+# define AV_RL16(x) \
+ ((((const uint8_t*)(x))[1] << 8) | \
+ ((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL16
+# define AV_WL16(p, d) do { \
+ ((uint8_t*)(p))[0] = (d); \
+ ((uint8_t*)(p))[1] = (d)>>8; \
+ } while(0)
+#endif
+
+#ifndef AV_RB32
+# define AV_RB32(x) \
+ ((((const uint8_t*)(x))[0] << 24) | \
+ (((const uint8_t*)(x))[1] << 16) | \
+ (((const uint8_t*)(x))[2] << 8) | \
+ ((const uint8_t*)(x))[3])
+#endif
+#ifndef AV_WB32
+# define AV_WB32(p, d) do { \
+ ((uint8_t*)(p))[3] = (d); \
+ ((uint8_t*)(p))[2] = (d)>>8; \
+ ((uint8_t*)(p))[1] = (d)>>16; \
+ ((uint8_t*)(p))[0] = (d)>>24; \
+ } while(0)
+#endif
+
+#ifndef AV_RL32
+# define AV_RL32(x) \
+ ((((const uint8_t*)(x))[3] << 24) | \
+ (((const uint8_t*)(x))[2] << 16) | \
+ (((const uint8_t*)(x))[1] << 8) | \
+ ((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL32
+# define AV_WL32(p, d) do { \
+ ((uint8_t*)(p))[0] = (d); \
+ ((uint8_t*)(p))[1] = (d)>>8; \
+ ((uint8_t*)(p))[2] = (d)>>16; \
+ ((uint8_t*)(p))[3] = (d)>>24; \
+ } while(0)
+#endif
+
+#ifndef AV_RB64
+# define AV_RB64(x) \
+ (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
+ ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
+ ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
+ ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
+ ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
+ ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
+ ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
+ (uint64_t)((const uint8_t*)(x))[7])
+#endif
+#ifndef AV_WB64
+# define AV_WB64(p, d) do { \
+ ((uint8_t*)(p))[7] = (d); \
+ ((uint8_t*)(p))[6] = (d)>>8; \
+ ((uint8_t*)(p))[5] = (d)>>16; \
+ ((uint8_t*)(p))[4] = (d)>>24; \
+ ((uint8_t*)(p))[3] = (d)>>32; \
+ ((uint8_t*)(p))[2] = (d)>>40; \
+ ((uint8_t*)(p))[1] = (d)>>48; \
+ ((uint8_t*)(p))[0] = (d)>>56; \
+ } while(0)
+#endif
+
+#ifndef AV_RL64
+# define AV_RL64(x) \
+ (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
+ ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
+ ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
+ ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
+ ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
+ ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
+ ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
+ (uint64_t)((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL64
+# define AV_WL64(p, d) do { \
+ ((uint8_t*)(p))[0] = (d); \
+ ((uint8_t*)(p))[1] = (d)>>8; \
+ ((uint8_t*)(p))[2] = (d)>>16; \
+ ((uint8_t*)(p))[3] = (d)>>24; \
+ ((uint8_t*)(p))[4] = (d)>>32; \
+ ((uint8_t*)(p))[5] = (d)>>40; \
+ ((uint8_t*)(p))[6] = (d)>>48; \
+ ((uint8_t*)(p))[7] = (d)>>56; \
+ } while(0)
+#endif
+
+#if AV_HAVE_BIGENDIAN
+# define AV_RN(s, p) AV_RB##s(p)
+# define AV_WN(s, p, v) AV_WB##s(p, v)
+#else
+# define AV_RN(s, p) AV_RL##s(p)
+# define AV_WN(s, p, v) AV_WL##s(p, v)
+#endif
+
+#endif /* HAVE_FAST_UNALIGNED */
+
+#ifndef AV_RN16
+# define AV_RN16(p) AV_RN(16, p)
+#endif
+
+#ifndef AV_RN32
+# define AV_RN32(p) AV_RN(32, p)
+#endif
+
+#ifndef AV_RN64
+# define AV_RN64(p) AV_RN(64, p)
+#endif
+
+#ifndef AV_WN16
+# define AV_WN16(p, v) AV_WN(16, p, v)
+#endif
+
+#ifndef AV_WN32
+# define AV_WN32(p, v) AV_WN(32, p, v)
+#endif
+
+#ifndef AV_WN64
+# define AV_WN64(p, v) AV_WN(64, p, v)
+#endif
+
+#if AV_HAVE_BIGENDIAN
+# define AV_RB(s, p) AV_RN##s(p)
+# define AV_WB(s, p, v) AV_WN##s(p, v)
+# define AV_RL(s, p) av_bswap##s(AV_RN##s(p))
+# define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
+#else
+# define AV_RB(s, p) av_bswap##s(AV_RN##s(p))
+# define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
+# define AV_RL(s, p) AV_RN##s(p)
+# define AV_WL(s, p, v) AV_WN##s(p, v)
+#endif
+
+#define AV_RB8(x) (((const uint8_t*)(x))[0])
+#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
+
+#define AV_RL8(x) AV_RB8(x)
+#define AV_WL8(p, d) AV_WB8(p, d)
+
+#ifndef AV_RB16
+# define AV_RB16(p) AV_RB(16, p)
+#endif
+#ifndef AV_WB16
+# define AV_WB16(p, v) AV_WB(16, p, v)
+#endif
+
+#ifndef AV_RL16
+# define AV_RL16(p) AV_RL(16, p)
+#endif
+#ifndef AV_WL16
+# define AV_WL16(p, v) AV_WL(16, p, v)
+#endif
+
+#ifndef AV_RB32
+# define AV_RB32(p) AV_RB(32, p)
+#endif
+#ifndef AV_WB32
+# define AV_WB32(p, v) AV_WB(32, p, v)
+#endif
+
+#ifndef AV_RL32
+# define AV_RL32(p) AV_RL(32, p)
+#endif
+#ifndef AV_WL32
+# define AV_WL32(p, v) AV_WL(32, p, v)
+#endif
+
+#ifndef AV_RB64
+# define AV_RB64(p) AV_RB(64, p)
+#endif
+#ifndef AV_WB64
+# define AV_WB64(p, v) AV_WB(64, p, v)
+#endif
+
+#ifndef AV_RL64
+# define AV_RL64(p) AV_RL(64, p)
+#endif
+#ifndef AV_WL64
+# define AV_WL64(p, v) AV_WL(64, p, v)
+#endif
+
+#ifndef AV_RB24
+# define AV_RB24(x) \
+ ((((const uint8_t*)(x))[0] << 16) | \
+ (((const uint8_t*)(x))[1] << 8) | \
+ ((const uint8_t*)(x))[2])
+#endif
+#ifndef AV_WB24
+# define AV_WB24(p, d) do { \
+ ((uint8_t*)(p))[2] = (d); \
+ ((uint8_t*)(p))[1] = (d)>>8; \
+ ((uint8_t*)(p))[0] = (d)>>16; \
+ } while(0)
+#endif
+
+#ifndef AV_RL24
+# define AV_RL24(x) \
+ ((((const uint8_t*)(x))[2] << 16) | \
+ (((const uint8_t*)(x))[1] << 8) | \
+ ((const uint8_t*)(x))[0])
+#endif
+#ifndef AV_WL24
+# define AV_WL24(p, d) do { \
+ ((uint8_t*)(p))[0] = (d); \
+ ((uint8_t*)(p))[1] = (d)>>8; \
+ ((uint8_t*)(p))[2] = (d)>>16; \
+ } while(0)
+#endif
+
+/*
+ * The AV_[RW]NA macros access naturally aligned data
+ * in a type-safe way.
+ */
+
+#define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
+#define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
+
+#ifndef AV_RN16A
+# define AV_RN16A(p) AV_RNA(16, p)
+#endif
+
+#ifndef AV_RN32A
+# define AV_RN32A(p) AV_RNA(32, p)
+#endif
+
+#ifndef AV_RN64A
+# define AV_RN64A(p) AV_RNA(64, p)
+#endif
+
+#ifndef AV_WN16A
+# define AV_WN16A(p, v) AV_WNA(16, p, v)
+#endif
+
+#ifndef AV_WN32A
+# define AV_WN32A(p, v) AV_WNA(32, p, v)
+#endif
+
+#ifndef AV_WN64A
+# define AV_WN64A(p, v) AV_WNA(64, p, v)
+#endif
+
+/* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
+ * naturally aligned. They may be implemented using MMX,
+ * so emms_c() must be called before using any float code
+ * afterwards.
+ */
+
+#define AV_COPY(n, d, s) \
+ (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
+
+#ifndef AV_COPY16
+# define AV_COPY16(d, s) AV_COPY(16, d, s)
+#endif
+
+#ifndef AV_COPY32
+# define AV_COPY32(d, s) AV_COPY(32, d, s)
+#endif
+
+#ifndef AV_COPY64
+# define AV_COPY64(d, s) AV_COPY(64, d, s)
+#endif
+
+#ifndef AV_COPY128
+# define AV_COPY128(d, s) \
+ do { \
+ AV_COPY64(d, s); \
+ AV_COPY64((char*)(d)+8, (char*)(s)+8); \
+ } while(0)
+#endif
+
+#define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
+
+#ifndef AV_SWAP64
+# define AV_SWAP64(a, b) AV_SWAP(64, a, b)
+#endif
+
+#define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
+
+#ifndef AV_ZERO16
+# define AV_ZERO16(d) AV_ZERO(16, d)
+#endif
+
+#ifndef AV_ZERO32
+# define AV_ZERO32(d) AV_ZERO(32, d)
+#endif
+
+#ifndef AV_ZERO64
+# define AV_ZERO64(d) AV_ZERO(64, d)
+#endif
+
+#ifndef AV_ZERO128
+# define AV_ZERO128(d) \
+ do { \
+ AV_ZERO64(d); \
+ AV_ZERO64((char*)(d)+8); \
+ } while(0)
+#endif
+
+#endif /* AVUTIL_INTREADWRITE_H */
--- /dev/null
+/*
+ * Lagged Fibonacci PRNG
+ * Copyright (c) 2008 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_LFG_H
+#define AVUTIL_LFG_H
+
+typedef struct {
+ unsigned int state[64];
+ int index;
+} AVLFG;
+
+void av_lfg_init(AVLFG *c, unsigned int seed);
+
+/**
+ * Get the next random unsigned 32-bit number using an ALFG.
+ *
+ * Please also consider a simple LCG like state= state*1664525+1013904223,
+ * it may be good enough and faster for your specific use case.
+ */
+static inline unsigned int av_lfg_get(AVLFG *c){
+ c->state[c->index & 63] = c->state[(c->index-24) & 63] + c->state[(c->index-55) & 63];
+ return c->state[c->index++ & 63];
+}
+
+/**
+ * Get the next random unsigned 32-bit number using a MLFG.
+ *
+ * Please also consider av_lfg_get() above, it is faster.
+ */
+static inline unsigned int av_mlfg_get(AVLFG *c){
+ unsigned int a= c->state[(c->index-55) & 63];
+ unsigned int b= c->state[(c->index-24) & 63];
+ return c->state[c->index++ & 63] = 2*a*b+a+b;
+}
+
+/**
+ * Get the next two numbers generated by a Box-Muller Gaussian
+ * generator using the random numbers issued by lfg.
+ *
+ * @param out[2] array where the two generated numbers are placed
+ */
+void av_bmg_get(AVLFG *lfg, double out[2]);
+
+#endif /* AVUTIL_LFG_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_LOG_H
+#define AVUTIL_LOG_H
+
+#include <stdarg.h>
+#include "avutil.h"
+
+/**
+ * Describe the class of an AVClass context structure. That is an
+ * arbitrary struct of which the first field is a pointer to an
+ * AVClass struct (e.g. AVCodecContext, AVFormatContext etc.).
+ */
+typedef struct {
+ /**
+ * The name of the class; usually it is the same name as the
+ * context structure type to which the AVClass is associated.
+ */
+ const char* class_name;
+
+ /**
+ * A pointer to a function which returns the name of a context
+ * instance ctx associated with the class.
+ */
+ const char* (*item_name)(void* ctx);
+
+ /**
+ * a pointer to the first option specified in the class if any or NULL
+ *
+ * @see av_set_default_options()
+ */
+ const struct AVOption *option;
+
+ /**
+ * LIBAVUTIL_VERSION with which this structure was created.
+ * This is used to allow fields to be added without requiring major
+ * version bumps everywhere.
+ */
+
+ int version;
+
+ /**
+ * Offset in the structure where log_level_offset is stored.
+ * 0 means there is no such variable
+ */
+ int log_level_offset_offset;
+
+ /**
+ * Offset in the structure where a pointer to the parent context for loging is stored.
+ * for example a decoder that uses eval.c could pass its AVCodecContext to eval as such
+ * parent context. And a av_log() implementation could then display the parent context
+ * can be NULL of course
+ */
+ int parent_log_context_offset;
+} AVClass;
+
+/* av_log API */
+
+#define AV_LOG_QUIET -8
+
+/**
+ * Something went really wrong and we will crash now.
+ */
+#define AV_LOG_PANIC 0
+
+/**
+ * Something went wrong and recovery is not possible.
+ * For example, no header was found for a format which depends
+ * on headers or an illegal combination of parameters is used.
+ */
+#define AV_LOG_FATAL 8
+
+/**
+ * Something went wrong and cannot losslessly be recovered.
+ * However, not all future data is affected.
+ */
+#define AV_LOG_ERROR 16
+
+/**
+ * Something somehow does not look correct. This may or may not
+ * lead to problems. An example would be the use of '-vstrict -2'.
+ */
+#define AV_LOG_WARNING 24
+
+#define AV_LOG_INFO 32
+#define AV_LOG_VERBOSE 40
+
+/**
+ * Stuff which is only useful for libav* developers.
+ */
+#define AV_LOG_DEBUG 48
+
+/**
+ * Send the specified message to the log if the level is less than or equal
+ * to the current av_log_level. By default, all logging messages are sent to
+ * stderr. This behavior can be altered by setting a different av_vlog callback
+ * function.
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ * pointer to an AVClass struct.
+ * @param level The importance level of the message, lower values signifying
+ * higher importance.
+ * @param fmt The format string (printf-compatible) that specifies how
+ * subsequent arguments are converted to output.
+ * @see av_vlog
+ */
+#ifdef __GNUC__
+void av_log(void *avcl, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
+#else
+void av_log(void *avcl, int level, const char *fmt, ...);
+#endif
+
+void av_vlog(void *avcl, int level, const char *fmt, va_list);
+int av_log_get_level(void);
+void av_log_set_level(int);
+void av_log_set_callback(void (*)(void*, int, const char*, va_list));
+void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl);
+const char* av_default_item_name(void* ctx);
+
+/**
+ * Skip repeated messages, this requires the user app to use av_log() instead of
+ * (f)printf as the 2 would otherwise interfere and lead to
+ * "Last message repeated x times" messages below (f)printf messages with some
+ * bad luck.
+ * Also to receive the last, "last repeated" line if any, the user app must
+ * call av_log(NULL, AV_LOG_QUIET, ""); at the end
+ */
+#define AV_LOG_SKIP_REPEATED 1
+void av_log_set_flags(int arg);
+
+#endif /* AVUTIL_LOG_H */
--- /dev/null
+/*
+ * LZO 1x decompression
+ * copyright (c) 2006 Reimar Doeffinger
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_LZO_H
+#define AVUTIL_LZO_H
+
+#include <stdint.h>
+
+/** \defgroup errflags Error flags returned by av_lzo1x_decode
+ * \{ */
+//! end of the input buffer reached before decoding finished
+#define AV_LZO_INPUT_DEPLETED 1
+//! decoded data did not fit into output buffer
+#define AV_LZO_OUTPUT_FULL 2
+//! a reference to previously decoded data was wrong
+#define AV_LZO_INVALID_BACKPTR 4
+//! a non-specific error in the compressed bitstream
+#define AV_LZO_ERROR 8
+/** \} */
+
+#define AV_LZO_INPUT_PADDING 8
+#define AV_LZO_OUTPUT_PADDING 12
+
+/**
+ * \brief Decodes LZO 1x compressed data.
+ * \param out output buffer
+ * \param outlen size of output buffer, number of bytes left are returned here
+ * \param in input buffer
+ * \param inlen size of input buffer, number of bytes left are returned here
+ * \return 0 on success, otherwise a combination of the error flags above
+ *
+ * Make sure all buffers are appropriately padded, in must provide
+ * AV_LZO_INPUT_PADDING, out must provide AV_LZO_OUTPUT_PADDING additional bytes.
+ */
+int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
+
+/**
+ * \brief deliberately overlapping memcpy implementation
+ * \param dst destination buffer; must be padded with 12 additional bytes
+ * \param back how many bytes back we start (the initial size of the overlapping window)
+ * \param cnt number of bytes to copy, must be >= 0
+ *
+ * cnt > back is valid, this will copy the bytes we just copied,
+ * thus creating a repeating pattern with a period length of back.
+ */
+void av_memcpy_backptr(uint8_t *dst, int back, int cnt);
+
+#endif /* AVUTIL_LZO_H */
--- /dev/null
+/*
+ * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_MATHEMATICS_H
+#define AVUTIL_MATHEMATICS_H
+
+#include <stdint.h>
+#include <math.h>
+#include "attributes.h"
+#include "rational.h"
+
+#ifndef M_E
+#define M_E 2.7182818284590452354 /* e */
+#endif
+#ifndef M_LN2
+#define M_LN2 0.69314718055994530942 /* log_e 2 */
+#endif
+#ifndef M_LN10
+#define M_LN10 2.30258509299404568402 /* log_e 10 */
+#endif
+#ifndef M_LOG2_10
+#define M_LOG2_10 3.32192809488736234787 /* log_2 10 */
+#endif
+#ifndef M_PHI
+#define M_PHI 1.61803398874989484820 /* phi / golden ratio */
+#endif
+#ifndef M_PI
+#define M_PI 3.14159265358979323846 /* pi */
+#endif
+#ifndef M_SQRT1_2
+#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
+#endif
+#ifndef M_SQRT2
+#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
+#endif
+#ifndef NAN
+#define NAN (0.0/0.0)
+#endif
+#ifndef INFINITY
+#define INFINITY (1.0/0.0)
+#endif
+
+enum AVRounding {
+ AV_ROUND_ZERO = 0, ///< Round toward zero.
+ AV_ROUND_INF = 1, ///< Round away from zero.
+ AV_ROUND_DOWN = 2, ///< Round toward -infinity.
+ AV_ROUND_UP = 3, ///< Round toward +infinity.
+ AV_ROUND_NEAR_INF = 5, ///< Round to nearest and halfway cases away from zero.
+};
+
+/**
+ * Return the greatest common divisor of a and b.
+ * If both a and b are 0 or either or both are <0 then behavior is
+ * undefined.
+ */
+int64_t av_const av_gcd(int64_t a, int64_t b);
+
+/**
+ * Rescale a 64-bit integer with rounding to nearest.
+ * A simple a*b/c isn't possible as it can overflow.
+ */
+int64_t av_rescale(int64_t a, int64_t b, int64_t c) av_const;
+
+/**
+ * Rescale a 64-bit integer with specified rounding.
+ * A simple a*b/c isn't possible as it can overflow.
+ */
+int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding) av_const;
+
+/**
+ * Rescale a 64-bit integer by 2 rational numbers.
+ */
+int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const;
+
+/**
+ * Compare 2 timestamps each in its own timebases.
+ * The result of the function is undefined if one of the timestamps
+ * is outside the int64_t range when represented in the others timebase.
+ * @return -1 if ts_a is before ts_b, 1 if ts_a is after ts_b or 0 if they represent the same position
+ */
+int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b);
+
+/**
+ * Compare 2 integers modulo mod.
+ * That is we compare integers a and b for which only the least
+ * significant log2(mod) bits are known.
+ *
+ * @param mod must be a power of 2
+ * @return a negative value if a is smaller than b
+ * a positive value if a is greater than b
+ * 0 if a equals b
+ */
+int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod);
+
+#endif /* AVUTIL_MATHEMATICS_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_MD5_H
+#define AVUTIL_MD5_H
+
+#include <stdint.h>
+
+extern const int av_md5_size;
+
+struct AVMD5;
+
+void av_md5_init(struct AVMD5 *ctx);
+void av_md5_update(struct AVMD5 *ctx, const uint8_t *src, const int len);
+void av_md5_final(struct AVMD5 *ctx, uint8_t *dst);
+void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len);
+
+#endif /* AVUTIL_MD5_H */
+
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * memory handling functions
+ */
+
+#ifndef AVUTIL_MEM_H
+#define AVUTIL_MEM_H
+
+#include "attributes.h"
+#include "avutil.h"
+
+#if defined(__ICC) && _ICC < 1200 || defined(__SUNPRO_C)
+ #define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
+ #define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v
+#elif defined(__TI_COMPILER_VERSION__)
+ #define DECLARE_ALIGNED(n,t,v) \
+ AV_PRAGMA(DATA_ALIGN(v,n)) \
+ t __attribute__((aligned(n))) v
+ #define DECLARE_ASM_CONST(n,t,v) \
+ AV_PRAGMA(DATA_ALIGN(v,n)) \
+ static const t __attribute__((aligned(n))) v
+#elif defined(__GNUC__)
+ #define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
+ #define DECLARE_ASM_CONST(n,t,v) static const t attribute_used __attribute__ ((aligned (n))) v
+#elif defined(_MSC_VER)
+ #define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
+ #define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v
+#else
+ #define DECLARE_ALIGNED(n,t,v) t v
+ #define DECLARE_ASM_CONST(n,t,v) static const t v
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+ #define av_malloc_attrib __attribute__((__malloc__))
+#else
+ #define av_malloc_attrib
+#endif
+
+#if (!defined(__ICC) || __ICC > 1200) && AV_GCC_VERSION_AT_LEAST(4,3)
+ #define av_alloc_size(n) __attribute__((alloc_size(n)))
+#else
+ #define av_alloc_size(n)
+#endif
+
+#if LIBAVUTIL_VERSION_MAJOR < 51
+# define FF_INTERNAL_MEM_TYPE unsigned int
+# define FF_INTERNAL_MEM_TYPE_MAX_VALUE UINT_MAX
+#else
+# define FF_INTERNAL_MEM_TYPE size_t
+# define FF_INTERNAL_MEM_TYPE_MAX_VALUE SIZE_MAX
+#endif
+
+/**
+ * Allocate a block of size bytes with alignment suitable for all
+ * memory accesses (including vectors if available on the CPU).
+ * @param size Size in bytes for the memory block to be allocated.
+ * @return Pointer to the allocated block, NULL if the block cannot
+ * be allocated.
+ * @see av_mallocz()
+ */
+void *av_malloc(FF_INTERNAL_MEM_TYPE size) av_malloc_attrib av_alloc_size(1);
+
+/**
+ * Allocate or reallocate a block of memory.
+ * If ptr is NULL and size > 0, allocate a new block. If
+ * size is zero, free the memory block pointed to by ptr.
+ * @param size Size in bytes for the memory block to be allocated or
+ * reallocated.
+ * @param ptr Pointer to a memory block already allocated with
+ * av_malloc(z)() or av_realloc() or NULL.
+ * @return Pointer to a newly reallocated block or NULL if the block
+ * cannot be reallocated or the function is used to free the memory block.
+ * @see av_fast_realloc()
+ */
+void *av_realloc(void *ptr, FF_INTERNAL_MEM_TYPE size) av_alloc_size(2);
+
+/**
+ * Free a memory block which has been allocated with av_malloc(z)() or
+ * av_realloc().
+ * @param ptr Pointer to the memory block which should be freed.
+ * @note ptr = NULL is explicitly allowed.
+ * @note It is recommended that you use av_freep() instead.
+ * @see av_freep()
+ */
+void av_free(void *ptr);
+
+/**
+ * Allocate a block of size bytes with alignment suitable for all
+ * memory accesses (including vectors if available on the CPU) and
+ * zero all the bytes of the block.
+ * @param size Size in bytes for the memory block to be allocated.
+ * @return Pointer to the allocated block, NULL if it cannot be allocated.
+ * @see av_malloc()
+ */
+void *av_mallocz(FF_INTERNAL_MEM_TYPE size) av_malloc_attrib av_alloc_size(1);
+
+/**
+ * Duplicate the string s.
+ * @param s string to be duplicated
+ * @return Pointer to a newly allocated string containing a
+ * copy of s or NULL if the string cannot be allocated.
+ */
+char *av_strdup(const char *s) av_malloc_attrib;
+
+/**
+ * Free a memory block which has been allocated with av_malloc(z)() or
+ * av_realloc() and set the pointer pointing to it to NULL.
+ * @param ptr Pointer to the pointer to the memory block which should
+ * be freed.
+ * @see av_free()
+ */
+void av_freep(void *ptr);
+
+#endif /* AVUTIL_MEM_H */
--- /dev/null
+/*
+ * AVOptions
+ * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_OPT_H
+#define AVUTIL_OPT_H
+
+/**
+ * @file
+ * AVOptions
+ */
+
+#include "rational.h"
+#include "avutil.h"
+
+enum AVOptionType{
+ FF_OPT_TYPE_FLAGS,
+ FF_OPT_TYPE_INT,
+ FF_OPT_TYPE_INT64,
+ FF_OPT_TYPE_DOUBLE,
+ FF_OPT_TYPE_FLOAT,
+ FF_OPT_TYPE_STRING,
+ FF_OPT_TYPE_RATIONAL,
+ FF_OPT_TYPE_BINARY, ///< offset must point to a pointer immediately followed by an int for the length
+ FF_OPT_TYPE_CONST=128,
+};
+
+/**
+ * AVOption
+ */
+typedef struct AVOption {
+ const char *name;
+
+ /**
+ * short English help text
+ * @todo What about other languages?
+ */
+ const char *help;
+
+ /**
+ * The offset relative to the context structure where the option
+ * value is stored. It should be 0 for named constants.
+ */
+ int offset;
+ enum AVOptionType type;
+
+ /**
+ * the default value for scalar options
+ */
+ double default_val;
+ double min; ///< minimum valid value for the option
+ double max; ///< maximum valid value for the option
+
+ int flags;
+#define AV_OPT_FLAG_ENCODING_PARAM 1 ///< a generic parameter which can be set by the user for muxing or encoding
+#define AV_OPT_FLAG_DECODING_PARAM 2 ///< a generic parameter which can be set by the user for demuxing or decoding
+#define AV_OPT_FLAG_METADATA 4 ///< some data extracted or inserted into the file like title, comment, ...
+#define AV_OPT_FLAG_AUDIO_PARAM 8
+#define AV_OPT_FLAG_VIDEO_PARAM 16
+#define AV_OPT_FLAG_SUBTITLE_PARAM 32
+//FIXME think about enc-audio, ... style flags
+
+ /**
+ * The logical unit to which the option belongs. Non-constant
+ * options and corresponding named constants share the same
+ * unit. May be NULL.
+ */
+ const char *unit;
+} AVOption;
+
+/**
+ * AVOption2.
+ * THIS IS NOT PART OF THE API/ABI YET!
+ * This is identical to AVOption except that default_val was replaced by
+ * an union, it should be compatible with AVOption on normal platforms.
+ */
+typedef struct AVOption2 {
+ const char *name;
+
+ /**
+ * short English help text
+ * @todo What about other languages?
+ */
+ const char *help;
+
+ /**
+ * The offset relative to the context structure where the option
+ * value is stored. It should be 0 for named constants.
+ */
+ int offset;
+ enum AVOptionType type;
+
+ /**
+ * the default value for scalar options
+ */
+ union {
+ double dbl;
+ const char *str;
+ } default_val;
+
+ double min; ///< minimum valid value for the option
+ double max; ///< maximum valid value for the option
+
+ int flags;
+/*
+#define AV_OPT_FLAG_ENCODING_PARAM 1 ///< a generic parameter which can be set by the user for muxing or encoding
+#define AV_OPT_FLAG_DECODING_PARAM 2 ///< a generic parameter which can be set by the user for demuxing or decoding
+#define AV_OPT_FLAG_METADATA 4 ///< some data extracted or inserted into the file like title, comment, ...
+#define AV_OPT_FLAG_AUDIO_PARAM 8
+#define AV_OPT_FLAG_VIDEO_PARAM 16
+#define AV_OPT_FLAG_SUBTITLE_PARAM 32
+*/
+//FIXME think about enc-audio, ... style flags
+
+ /**
+ * The logical unit to which the option belongs. Non-constant
+ * options and corresponding named constants share the same
+ * unit. May be NULL.
+ */
+ const char *unit;
+} AVOption2;
+
+
+/**
+ * Look for an option in obj. Look only for the options which
+ * have the flags set as specified in mask and flags (that is,
+ * for which it is the case that opt->flags & mask == flags).
+ *
+ * @param[in] obj a pointer to a struct whose first element is a
+ * pointer to an AVClass
+ * @param[in] name the name of the option to look for
+ * @param[in] unit the unit of the option to look for, or any if NULL
+ * @return a pointer to the option found, or NULL if no option
+ * has been found
+ */
+const AVOption *av_find_opt(void *obj, const char *name, const char *unit, int mask, int flags);
+
+/**
+ * Set the field of obj with the given name to value.
+ *
+ * @param[in] obj A struct whose first element is a pointer to an
+ * AVClass.
+ * @param[in] name the name of the field to set
+ * @param[in] val The value to set. If the field is not of a string
+ * type, then the given string is parsed.
+ * SI postfixes and some named scalars are supported.
+ * If the field is of a numeric type, it has to be a numeric or named
+ * scalar. Behavior with more than one scalar and +- infix operators
+ * is undefined.
+ * If the field is of a flags type, it has to be a sequence of numeric
+ * scalars or named flags separated by '+' or '-'. Prefixing a flag
+ * with '+' causes it to be set without affecting the other flags;
+ * similarly, '-' unsets a flag.
+ * @param[out] o_out if non-NULL put here a pointer to the AVOption
+ * found
+ * @param alloc when 1 then the old value will be av_freed() and the
+ * new av_strduped()
+ * when 0 then no av_free() nor av_strdup() will be used
+ * @return 0 if the value has been set, or an AVERROR code in case of
+ * error:
+ * AVERROR(ENOENT) if no matching option exists
+ * AVERROR(ERANGE) if the value is out of range
+ * AVERROR(EINVAL) if the value is not valid
+ */
+int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out);
+
+const AVOption *av_set_double(void *obj, const char *name, double n);
+const AVOption *av_set_q(void *obj, const char *name, AVRational n);
+const AVOption *av_set_int(void *obj, const char *name, int64_t n);
+double av_get_double(void *obj, const char *name, const AVOption **o_out);
+AVRational av_get_q(void *obj, const char *name, const AVOption **o_out);
+int64_t av_get_int(void *obj, const char *name, const AVOption **o_out);
+const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len);
+const AVOption *av_next_option(void *obj, const AVOption *last);
+
+/**
+ * Show the obj options.
+ *
+ * @param req_flags requested flags for the options to show. Show only the
+ * options for which it is opt->flags & req_flags.
+ * @param rej_flags rejected flags for the options to show. Show only the
+ * options for which it is !(opt->flags & req_flags).
+ * @param av_log_obj log context to use for showing the options
+ */
+int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags);
+
+void av_opt_set_defaults(void *s);
+void av_opt_set_defaults2(void *s, int mask, int flags);
+
+/**
+ * Parse the key/value pairs list in opts. For each key/value pair
+ * found, stores the value in the field in ctx that is named like the
+ * key. ctx must be an AVClass context, storing is done using
+ * AVOptions.
+ *
+ * @param key_val_sep a 0-terminated list of characters used to
+ * separate key from value
+ * @param pairs_sep a 0-terminated list of characters used to separate
+ * two pairs from each other
+ * @return the number of successfully set key/value pairs, or a negative
+ * value corresponding to an AVERROR code in case of error:
+ * AVERROR(EINVAL) if opts cannot be parsed,
+ * the error code issued by av_set_string3() if a key/value pair
+ * cannot be set
+ */
+int av_set_options_string(void *ctx, const char *opts,
+ const char *key_val_sep, const char *pairs_sep);
+
+#endif /* AVUTIL_OPT_H */
--- /dev/null
+/*
+ * pixel format descriptor
+ * Copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_PIXDESC_H
+#define AVUTIL_PIXDESC_H
+
+#include <inttypes.h>
+
+typedef struct AVComponentDescriptor{
+ uint16_t plane :2; ///< which of the 4 planes contains the component
+
+ /**
+ * Number of elements between 2 horizontally consecutive pixels minus 1.
+ * Elements are bits for bitstream formats, bytes otherwise.
+ */
+ uint16_t step_minus1 :3;
+
+ /**
+ * Number of elements before the component of the first pixel plus 1.
+ * Elements are bits for bitstream formats, bytes otherwise.
+ */
+ uint16_t offset_plus1 :3;
+ uint16_t shift :3; ///< number of least significant bits that must be shifted away to get the value
+ uint16_t depth_minus1 :4; ///< number of bits in the component minus 1
+}AVComponentDescriptor;
+
+/**
+ * Descriptor that unambiguously describes how the bits of a pixel are
+ * stored in the up to 4 data planes of an image. It also stores the
+ * subsampling factors and number of components.
+ *
+ * @note This is separate of the colorspace (RGB, YCbCr, YPbPr, JPEG-style YUV
+ * and all the YUV variants) AVPixFmtDescriptor just stores how values
+ * are stored not what these values represent.
+ */
+typedef struct AVPixFmtDescriptor{
+ const char *name;
+ uint8_t nb_components; ///< The number of components each pixel has, (1-4)
+
+ /**
+ * Amount to shift the luma width right to find the chroma width.
+ * For YV12 this is 1 for example.
+ * chroma_width = -((-luma_width) >> log2_chroma_w)
+ * The note above is needed to ensure rounding up.
+ * This value only refers to the chroma components.
+ */
+ uint8_t log2_chroma_w; ///< chroma_width = -((-luma_width )>>log2_chroma_w)
+
+ /**
+ * Amount to shift the luma height right to find the chroma height.
+ * For YV12 this is 1 for example.
+ * chroma_height= -((-luma_height) >> log2_chroma_h)
+ * The note above is needed to ensure rounding up.
+ * This value only refers to the chroma components.
+ */
+ uint8_t log2_chroma_h;
+ uint8_t flags;
+
+ /**
+ * Parameters that describe how pixels are packed. If the format
+ * has chroma components, they must be stored in comp[1] and
+ * comp[2].
+ */
+ AVComponentDescriptor comp[4];
+}AVPixFmtDescriptor;
+
+#define PIX_FMT_BE 1 ///< Pixel format is big-endian.
+#define PIX_FMT_PAL 2 ///< Pixel format has a palette in data[1], values are indexes in this palette.
+#define PIX_FMT_BITSTREAM 4 ///< All values of a component are bit-wise packed end to end.
+#define PIX_FMT_HWACCEL 8 ///< Pixel format is an HW accelerated format.
+
+/**
+ * The array of all the pixel format descriptors.
+ */
+extern const AVPixFmtDescriptor av_pix_fmt_descriptors[];
+
+/**
+ * Read a line from an image, and write the values of the
+ * pixel format component c to dst.
+ *
+ * @param data the array containing the pointers to the planes of the image
+ * @param linesize the array containing the linesizes of the image
+ * @param desc the pixel format descriptor for the image
+ * @param x the horizontal coordinate of the first pixel to read
+ * @param y the vertical coordinate of the first pixel to read
+ * @param w the width of the line to read, that is the number of
+ * values to write to dst
+ * @param read_pal_component if not zero and the format is a paletted
+ * format writes the values corresponding to the palette
+ * component c in data[1] to dst, rather than the palette indexes in
+ * data[0]. The behavior is undefined if the format is not paletted.
+ */
+void av_read_image_line(uint16_t *dst, const uint8_t *data[4], const int linesize[4],
+ const AVPixFmtDescriptor *desc, int x, int y, int c, int w, int read_pal_component);
+
+/**
+ * Write the values from src to the pixel format component c of an
+ * image line.
+ *
+ * @param src array containing the values to write
+ * @param data the array containing the pointers to the planes of the
+ * image to write into. It is supposed to be zeroed.
+ * @param linesize the array containing the linesizes of the image
+ * @param desc the pixel format descriptor for the image
+ * @param x the horizontal coordinate of the first pixel to write
+ * @param y the vertical coordinate of the first pixel to write
+ * @param w the width of the line to write, that is the number of
+ * values to write to the image line
+ */
+void av_write_image_line(const uint16_t *src, uint8_t *data[4], const int linesize[4],
+ const AVPixFmtDescriptor *desc, int x, int y, int c, int w);
+
+/**
+ * Return the pixel format corresponding to name.
+ *
+ * If there is no pixel format with name name, then looks for a
+ * pixel format with the name corresponding to the native endian
+ * format of name.
+ * For example in a little-endian system, first looks for "gray16",
+ * then for "gray16le".
+ *
+ * Finally if no pixel format has been found, returns PIX_FMT_NONE.
+ */
+enum PixelFormat av_get_pix_fmt(const char *name);
+
+/**
+ * Print in buf the string corresponding to the pixel format with
+ * number pix_fmt, or an header if pix_fmt is negative.
+ *
+ * @param buf the buffer where to write the string
+ * @param buf_size the size of buf
+ * @param pix_fmt the number of the pixel format to print the
+ * corresponding info string, or a negative value to print the
+ * corresponding header.
+ */
+char *av_get_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
+
+/**
+ * Return the number of bits per pixel used by the pixel format
+ * described by pixdesc.
+ *
+ * The returned number of bits refers to the number of bits actually
+ * used for storing the pixel information, that is padding bits are
+ * not counted.
+ */
+int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc);
+
+#endif /* AVUTIL_PIXDESC_H */
--- /dev/null
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_PIXFMT_H
+#define AVUTIL_PIXFMT_H
+
+/**
+ * @file
+ * pixel format definitions
+ *
+ * @warning This file has to be considered an internal but installed
+ * header, so it should not be directly included in your projects.
+ */
+
+#include "libavutil/avconfig.h"
+
+/**
+ * Pixel format. Notes:
+ *
+ * PIX_FMT_RGB32 is handled in an endian-specific manner. An RGBA
+ * color is put together as:
+ * (A << 24) | (R << 16) | (G << 8) | B
+ * This is stored as BGRA on little-endian CPU architectures and ARGB on
+ * big-endian CPUs.
+ *
+ * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
+ * image data is stored in AVFrame.data[0]. The palette is transported in
+ * AVFrame.data[1], is 1024 bytes long (256 4-byte entries) and is
+ * formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
+ * also endian-specific). Note also that the individual RGB palette
+ * components stored in AVFrame.data[1] should be in the range 0..255.
+ * This is important as many custom PAL8 video codecs that were designed
+ * to run on the IBM VGA graphics adapter use 6-bit palette components.
+ *
+ * For all the 8bit per pixel formats, an RGB32 palette is in data[1] like
+ * for pal8. This palette is filled in automatically by the function
+ * allocating the picture.
+ *
+ * Note, make sure that all newly added big endian formats have pix_fmt&1==1
+ * and that all newly added little endian formats have pix_fmt&1==0
+ * this allows simpler detection of big vs little endian.
+ */
+enum PixelFormat {
+ PIX_FMT_NONE= -1,
+ PIX_FMT_YUV420P, ///< planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
+ PIX_FMT_YUYV422, ///< packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
+ PIX_FMT_RGB24, ///< packed RGB 8:8:8, 24bpp, RGBRGB...
+ PIX_FMT_BGR24, ///< packed RGB 8:8:8, 24bpp, BGRBGR...
+ PIX_FMT_YUV422P, ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
+ PIX_FMT_YUV444P, ///< planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
+ PIX_FMT_YUV410P, ///< planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
+ PIX_FMT_YUV411P, ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
+ PIX_FMT_GRAY8, ///< Y , 8bpp
+ PIX_FMT_MONOWHITE, ///< Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb
+ PIX_FMT_MONOBLACK, ///< Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb
+ PIX_FMT_PAL8, ///< 8 bit with PIX_FMT_RGB32 palette
+ PIX_FMT_YUVJ420P, ///< planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV420P and setting color_range
+ PIX_FMT_YUVJ422P, ///< planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV422P and setting color_range
+ PIX_FMT_YUVJ444P, ///< planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV444P and setting color_range
+ PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing
+ PIX_FMT_XVMC_MPEG2_IDCT,
+ PIX_FMT_UYVY422, ///< packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
+ PIX_FMT_UYYVYY411, ///< packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
+ PIX_FMT_BGR8, ///< packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
+ PIX_FMT_BGR4, ///< packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
+ PIX_FMT_BGR4_BYTE, ///< packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
+ PIX_FMT_RGB8, ///< packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
+ PIX_FMT_RGB4, ///< packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
+ PIX_FMT_RGB4_BYTE, ///< packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
+ PIX_FMT_NV12, ///< planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (first byte U and the following byte V)
+ PIX_FMT_NV21, ///< as above, but U and V bytes are swapped
+
+ PIX_FMT_ARGB, ///< packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
+ PIX_FMT_RGBA, ///< packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
+ PIX_FMT_ABGR, ///< packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
+ PIX_FMT_BGRA, ///< packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
+
+ PIX_FMT_GRAY16BE, ///< Y , 16bpp, big-endian
+ PIX_FMT_GRAY16LE, ///< Y , 16bpp, little-endian
+ PIX_FMT_YUV440P, ///< planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
+ PIX_FMT_YUVJ440P, ///< planar YUV 4:4:0 full scale (JPEG), deprecated in favor of PIX_FMT_YUV440P and setting color_range
+ PIX_FMT_YUVA420P, ///< planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
+ PIX_FMT_VDPAU_H264,///< H.264 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+ PIX_FMT_VDPAU_MPEG1,///< MPEG-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+ PIX_FMT_VDPAU_MPEG2,///< MPEG-2 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+ PIX_FMT_VDPAU_WMV3,///< WMV3 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+ PIX_FMT_VDPAU_VC1, ///< VC-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+ PIX_FMT_RGB48BE, ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big-endian
+ PIX_FMT_RGB48LE, ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as little-endian
+
+ PIX_FMT_RGB565BE, ///< packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
+ PIX_FMT_RGB565LE, ///< packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
+ PIX_FMT_RGB555BE, ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), big-endian, most significant bit to 0
+ PIX_FMT_RGB555LE, ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), little-endian, most significant bit to 0
+
+ PIX_FMT_BGR565BE, ///< packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
+ PIX_FMT_BGR565LE, ///< packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
+ PIX_FMT_BGR555BE, ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), big-endian, most significant bit to 1
+ PIX_FMT_BGR555LE, ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), little-endian, most significant bit to 1
+
+ PIX_FMT_VAAPI_MOCO, ///< HW acceleration through VA API at motion compensation entry-point, Picture.data[3] contains a vaapi_render_state struct which contains macroblocks as well as various fields extracted from headers
+ PIX_FMT_VAAPI_IDCT, ///< HW acceleration through VA API at IDCT entry-point, Picture.data[3] contains a vaapi_render_state struct which contains fields extracted from headers
+ PIX_FMT_VAAPI_VLD, ///< HW decoding through VA API, Picture.data[3] contains a vaapi_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+
+ PIX_FMT_YUV420P16LE, ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
+ PIX_FMT_YUV420P16BE, ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
+ PIX_FMT_YUV422P16LE, ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
+ PIX_FMT_YUV422P16BE, ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
+ PIX_FMT_YUV444P16LE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
+ PIX_FMT_YUV444P16BE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
+ PIX_FMT_VDPAU_MPEG4, ///< MPEG4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+ PIX_FMT_DXVA2_VLD, ///< HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer
+
+ PIX_FMT_RGB444BE, ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), big-endian, most significant bits to 0
+ PIX_FMT_RGB444LE, ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), little-endian, most significant bits to 0
+ PIX_FMT_BGR444BE, ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), big-endian, most significant bits to 1
+ PIX_FMT_BGR444LE, ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), little-endian, most significant bits to 1
+ PIX_FMT_Y400A, ///< 8bit gray, 8bit alpha
+ PIX_FMT_NB, ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
+};
+
+#if AV_HAVE_BIGENDIAN
+# define PIX_FMT_NE(be, le) PIX_FMT_##be
+#else
+# define PIX_FMT_NE(be, le) PIX_FMT_##le
+#endif
+
+#define PIX_FMT_RGB32 PIX_FMT_NE(ARGB, BGRA)
+#define PIX_FMT_RGB32_1 PIX_FMT_NE(RGBA, ABGR)
+#define PIX_FMT_BGR32 PIX_FMT_NE(ABGR, RGBA)
+#define PIX_FMT_BGR32_1 PIX_FMT_NE(BGRA, ARGB)
+
+#define PIX_FMT_GRAY16 PIX_FMT_NE(GRAY16BE, GRAY16LE)
+#define PIX_FMT_RGB48 PIX_FMT_NE(RGB48BE, RGB48LE)
+#define PIX_FMT_RGB565 PIX_FMT_NE(RGB565BE, RGB565LE)
+#define PIX_FMT_RGB555 PIX_FMT_NE(RGB555BE, RGB555LE)
+#define PIX_FMT_RGB444 PIX_FMT_NE(RGB444BE, RGB444LE)
+#define PIX_FMT_BGR565 PIX_FMT_NE(BGR565BE, BGR565LE)
+#define PIX_FMT_BGR555 PIX_FMT_NE(BGR555BE, BGR555LE)
+#define PIX_FMT_BGR444 PIX_FMT_NE(BGR444BE, BGR444LE)
+
+#define PIX_FMT_YUV420P16 PIX_FMT_NE(YUV420P16BE, YUV420P16LE)
+#define PIX_FMT_YUV422P16 PIX_FMT_NE(YUV422P16BE, YUV422P16LE)
+#define PIX_FMT_YUV444P16 PIX_FMT_NE(YUV444P16BE, YUV444P16LE)
+
+#endif /* AVUTIL_PIXFMT_H */
--- /dev/null
+/*
+ * Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_RANDOM_SEED_H
+#define AVUTIL_RANDOM_SEED_H
+
+#include <stdint.h>
+
+/**
+ * Get a seed to use in conjunction with random functions.
+ */
+uint32_t av_get_random_seed(void);
+
+#endif /* AVUTIL_RANDOM_SEED_H */
--- /dev/null
+/*
+ * rational numbers
+ * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * rational numbers
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef AVUTIL_RATIONAL_H
+#define AVUTIL_RATIONAL_H
+
+#include <stdint.h>
+#include <limits.h>
+#include "attributes.h"
+
+/**
+ * rational number numerator/denominator
+ */
+typedef struct AVRational{
+ int num; ///< numerator
+ int den; ///< denominator
+} AVRational;
+
+/**
+ * Compare two rationals.
+ * @param a first rational
+ * @param b second rational
+ * @return 0 if a==b, 1 if a>b, -1 if a<b, and INT_MIN if one of the
+ * values is of the form 0/0
+ */
+static inline int av_cmp_q(AVRational a, AVRational b){
+ const int64_t tmp= a.num * (int64_t)b.den - b.num * (int64_t)a.den;
+
+ if(tmp) return ((tmp ^ a.den ^ b.den)>>63)|1;
+ else if(b.den && a.den) return 0;
+ else if(a.num && b.num) return (a.num>>31) - (b.num>>31);
+ else return INT_MIN;
+}
+
+/**
+ * Convert rational to double.
+ * @param a rational to convert
+ * @return (double) a
+ */
+static inline double av_q2d(AVRational a){
+ return a.num / (double) a.den;
+}
+
+/**
+ * Reduce a fraction.
+ * This is useful for framerate calculations.
+ * @param dst_num destination numerator
+ * @param dst_den destination denominator
+ * @param num source numerator
+ * @param den source denominator
+ * @param max the maximum allowed for dst_num & dst_den
+ * @return 1 if exact, 0 otherwise
+ */
+int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max);
+
+/**
+ * Multiply two rationals.
+ * @param b first rational
+ * @param c second rational
+ * @return b*c
+ */
+AVRational av_mul_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Divide one rational by another.
+ * @param b first rational
+ * @param c second rational
+ * @return b/c
+ */
+AVRational av_div_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Add two rationals.
+ * @param b first rational
+ * @param c second rational
+ * @return b+c
+ */
+AVRational av_add_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Subtract one rational from another.
+ * @param b first rational
+ * @param c second rational
+ * @return b-c
+ */
+AVRational av_sub_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Convert a double precision floating point number to a rational.
+ * inf is expressed as {1,0} or {-1,0} depending on the sign.
+ *
+ * @param d double to convert
+ * @param max the maximum allowed numerator and denominator
+ * @return (AVRational) d
+ */
+AVRational av_d2q(double d, int max) av_const;
+
+/**
+ * @return 1 if q1 is nearer to q than q2, -1 if q2 is nearer
+ * than q1, 0 if they have the same distance.
+ */
+int av_nearer_q(AVRational q, AVRational q1, AVRational q2);
+
+/**
+ * Find the nearest value in q_list to q.
+ * @param q_list an array of rationals terminated by {0, 0}
+ * @return the index of the nearest value found in the array
+ */
+int av_find_nearest_q_idx(AVRational q, const AVRational* q_list);
+
+#endif /* AVUTIL_RATIONAL_H */
--- /dev/null
+/*
+ * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_SHA1_H
+#define AVUTIL_SHA1_H
+
+#include <stdint.h>
+
+extern const int av_sha1_size;
+
+struct AVSHA1;
+
+/**
+ * Initialize SHA-1 hashing.
+ *
+ * @param context pointer to the function context (of size av_sha_size)
+ * @deprecated use av_sha_init() instead
+ */
+void av_sha1_init(struct AVSHA1* context);
+
+/**
+ * Update hash value.
+ *
+ * @param context hash function context
+ * @param data input data to update hash with
+ * @param len input data length
+ * @deprecated use av_sha_update() instead
+ */
+void av_sha1_update(struct AVSHA1* context, const uint8_t* data, unsigned int len);
+
+/**
+ * Finish hashing and output digest value.
+ *
+ * @param context hash function context
+ * @param digest buffer where output digest value is stored
+ * @deprecated use av_sha_final() instead
+ */
+void av_sha1_final(struct AVSHA1* context, uint8_t digest[20]);
+
+#endif /* AVUTIL_SHA1_H */
--- /dev/null
+/*
+ * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef SWSCALE_SWSCALE_H
+#define SWSCALE_SWSCALE_H
+
+/**
+ * @file
+ * @brief
+ * external api for the swscale stuff
+ */
+
+#include "libavutil/avutil.h"
+
+#define LIBSWSCALE_VERSION_MAJOR 0
+#define LIBSWSCALE_VERSION_MINOR 12
+#define LIBSWSCALE_VERSION_MICRO 0
+
+#define LIBSWSCALE_VERSION_INT AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
+ LIBSWSCALE_VERSION_MINOR, \
+ LIBSWSCALE_VERSION_MICRO)
+#define LIBSWSCALE_VERSION AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
+ LIBSWSCALE_VERSION_MINOR, \
+ LIBSWSCALE_VERSION_MICRO)
+#define LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT
+
+#define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
+
+/**
+ * Those FF_API_* defines are not part of public API.
+ * They may change, break or disappear at any time.
+ */
+#ifndef FF_API_SWS_GETCONTEXT
+#define FF_API_SWS_GETCONTEXT (LIBSWSCALE_VERSION_MAJOR < 1)
+#endif
+
+/**
+ * Returns the LIBSWSCALE_VERSION_INT constant.
+ */
+unsigned swscale_version(void);
+
+/**
+ * Returns the libswscale build-time configuration.
+ */
+const char *swscale_configuration(void);
+
+/**
+ * Returns the libswscale license.
+ */
+const char *swscale_license(void);
+
+/* values for the flags, the stuff on the command line is different */
+#define SWS_FAST_BILINEAR 1
+#define SWS_BILINEAR 2
+#define SWS_BICUBIC 4
+#define SWS_X 8
+#define SWS_POINT 0x10
+#define SWS_AREA 0x20
+#define SWS_BICUBLIN 0x40
+#define SWS_GAUSS 0x80
+#define SWS_SINC 0x100
+#define SWS_LANCZOS 0x200
+#define SWS_SPLINE 0x400
+
+#define SWS_SRC_V_CHR_DROP_MASK 0x30000
+#define SWS_SRC_V_CHR_DROP_SHIFT 16
+
+#define SWS_PARAM_DEFAULT 123456
+
+#define SWS_PRINT_INFO 0x1000
+
+//the following 3 flags are not completely implemented
+//internal chrominace subsampling info
+#define SWS_FULL_CHR_H_INT 0x2000
+//input subsampling info
+#define SWS_FULL_CHR_H_INP 0x4000
+#define SWS_DIRECT_BGR 0x8000
+#define SWS_ACCURATE_RND 0x40000
+#define SWS_BITEXACT 0x80000
+
+#define SWS_CPU_CAPS_MMX 0x80000000
+#define SWS_CPU_CAPS_MMX2 0x20000000
+#define SWS_CPU_CAPS_3DNOW 0x40000000
+#define SWS_CPU_CAPS_ALTIVEC 0x10000000
+#define SWS_CPU_CAPS_BFIN 0x01000000
+#define SWS_CPU_CAPS_SSE2 0x02000000
+
+#define SWS_MAX_REDUCE_CUTOFF 0.002
+
+#define SWS_CS_ITU709 1
+#define SWS_CS_FCC 4
+#define SWS_CS_ITU601 5
+#define SWS_CS_ITU624 5
+#define SWS_CS_SMPTE170M 5
+#define SWS_CS_SMPTE240M 7
+#define SWS_CS_DEFAULT 5
+
+/**
+ * Returns a pointer to yuv<->rgb coefficients for the given colorspace
+ * suitable for sws_setColorspaceDetails().
+ *
+ * @param colorspace One of the SWS_CS_* macros. If invalid,
+ * SWS_CS_DEFAULT is used.
+ */
+const int *sws_getCoefficients(int colorspace);
+
+
+// when used for filters they must have an odd number of elements
+// coeffs cannot be shared between vectors
+typedef struct {
+ double *coeff; ///< pointer to the list of coefficients
+ int length; ///< number of coefficients in the vector
+} SwsVector;
+
+// vectors can be shared
+typedef struct {
+ SwsVector *lumH;
+ SwsVector *lumV;
+ SwsVector *chrH;
+ SwsVector *chrV;
+} SwsFilter;
+
+struct SwsContext;
+
+/**
+ * Returns a positive value if pix_fmt is a supported input format, 0
+ * otherwise.
+ */
+int sws_isSupportedInput(enum PixelFormat pix_fmt);
+
+/**
+ * Returns a positive value if pix_fmt is a supported output format, 0
+ * otherwise.
+ */
+int sws_isSupportedOutput(enum PixelFormat pix_fmt);
+
+/**
+ * Allocates an empty SwsContext. This must be filled and passed to
+ * sws_init_context(). For filling see AVOptions, options.c and
+ * sws_setColorspaceDetails().
+ */
+struct SwsContext *sws_alloc_context(void);
+
+/**
+ * Initializes the swscaler context sws_context.
+ *
+ * @return zero or positive value on success, a negative value on
+ * error
+ */
+int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter);
+
+/**
+ * Frees the swscaler context swsContext.
+ * If swsContext is NULL, then does nothing.
+ */
+void sws_freeContext(struct SwsContext *swsContext);
+
+#if FF_API_SWS_GETCONTEXT
+/**
+ * Allocates and returns a SwsContext. You need it to perform
+ * scaling/conversion operations using sws_scale().
+ *
+ * @param srcW the width of the source image
+ * @param srcH the height of the source image
+ * @param srcFormat the source image format
+ * @param dstW the width of the destination image
+ * @param dstH the height of the destination image
+ * @param dstFormat the destination image format
+ * @param flags specify which algorithm and options to use for rescaling
+ * @return a pointer to an allocated context, or NULL in case of error
+ * @deprecated use sws_alloc_context() and sws_init_context()
+ */
+attribute_deprecated
+struct SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
+ int dstW, int dstH, enum PixelFormat dstFormat,
+ int flags, SwsFilter *srcFilter,
+ SwsFilter *dstFilter, const double *param);
+#endif
+
+/**
+ * Scales the image slice in srcSlice and puts the resulting scaled
+ * slice in the image in dst. A slice is a sequence of consecutive
+ * rows in an image.
+ *
+ * Slices have to be provided in sequential order, either in
+ * top-bottom or bottom-top order. If slices are provided in
+ * non-sequential order the behavior of the function is undefined.
+ *
+ * @param context the scaling context previously created with
+ * sws_getContext()
+ * @param srcSlice the array containing the pointers to the planes of
+ * the source slice
+ * @param srcStride the array containing the strides for each plane of
+ * the source image
+ * @param srcSliceY the position in the source image of the slice to
+ * process, that is the number (counted starting from
+ * zero) in the image of the first row of the slice
+ * @param srcSliceH the height of the source slice, that is the number
+ * of rows in the slice
+ * @param dst the array containing the pointers to the planes of
+ * the destination image
+ * @param dstStride the array containing the strides for each plane of
+ * the destination image
+ * @return the height of the output slice
+ */
+int sws_scale(struct SwsContext *context, const uint8_t* const srcSlice[], const int srcStride[],
+ int srcSliceY, int srcSliceH, uint8_t* const dst[], const int dstStride[]);
+
+#if LIBSWSCALE_VERSION_MAJOR < 1
+/**
+ * @deprecated Use sws_scale() instead.
+ */
+int sws_scale_ordered(struct SwsContext *context, const uint8_t* const src[],
+ int srcStride[], int srcSliceY, int srcSliceH,
+ uint8_t* dst[], int dstStride[]) attribute_deprecated;
+#endif
+
+/**
+ * @param inv_table the yuv2rgb coefficients, normally ff_yuv2rgb_coeffs[x]
+ * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235
+ * @return -1 if not supported
+ */
+int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
+ int srcRange, const int table[4], int dstRange,
+ int brightness, int contrast, int saturation);
+
+/**
+ * @return -1 if not supported
+ */
+int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
+ int *srcRange, int **table, int *dstRange,
+ int *brightness, int *contrast, int *saturation);
+
+/**
+ * Allocates and returns an uninitialized vector with length coefficients.
+ */
+SwsVector *sws_allocVec(int length);
+
+/**
+ * Returns a normalized Gaussian curve used to filter stuff
+ * quality=3 is high quality, lower is lower quality.
+ */
+SwsVector *sws_getGaussianVec(double variance, double quality);
+
+/**
+ * Allocates and returns a vector with length coefficients, all
+ * with the same value c.
+ */
+SwsVector *sws_getConstVec(double c, int length);
+
+/**
+ * Allocates and returns a vector with just one coefficient, with
+ * value 1.0.
+ */
+SwsVector *sws_getIdentityVec(void);
+
+/**
+ * Scales all the coefficients of a by the scalar value.
+ */
+void sws_scaleVec(SwsVector *a, double scalar);
+
+/**
+ * Scales all the coefficients of a so that their sum equals height.
+ */
+void sws_normalizeVec(SwsVector *a, double height);
+void sws_convVec(SwsVector *a, SwsVector *b);
+void sws_addVec(SwsVector *a, SwsVector *b);
+void sws_subVec(SwsVector *a, SwsVector *b);
+void sws_shiftVec(SwsVector *a, int shift);
+
+/**
+ * Allocates and returns a clone of the vector a, that is a vector
+ * with the same coefficients as a.
+ */
+SwsVector *sws_cloneVec(SwsVector *a);
+
+#if LIBSWSCALE_VERSION_MAJOR < 1
+/**
+ * @deprecated Use sws_printVec2() instead.
+ */
+attribute_deprecated void sws_printVec(SwsVector *a);
+#endif
+
+/**
+ * Prints with av_log() a textual representation of the vector a
+ * if log_level <= av_log_level.
+ */
+void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level);
+
+void sws_freeVec(SwsVector *a);
+
+SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
+ float lumaSharpen, float chromaSharpen,
+ float chromaHShift, float chromaVShift,
+ int verbose);
+void sws_freeFilter(SwsFilter *filter);
+
+/**
+ * Checks if context can be reused, otherwise reallocates a new
+ * one.
+ *
+ * If context is NULL, just calls sws_getContext() to get a new
+ * context. Otherwise, checks if the parameters are the ones already
+ * saved in context. If that is the case, returns the current
+ * context. Otherwise, frees context and gets a new context with
+ * the new parameters.
+ *
+ * Be warned that srcFilter and dstFilter are not checked, they
+ * are assumed to remain the same.
+ */
+struct SwsContext *sws_getCachedContext(struct SwsContext *context,
+ int srcW, int srcH, enum PixelFormat srcFormat,
+ int dstW, int dstH, enum PixelFormat dstFormat,
+ int flags, SwsFilter *srcFilter,
+ SwsFilter *dstFilter, const double *param);
+
+/**
+ * Converts an 8bit paletted frame into a frame with a color depth of 32-bits.
+ *
+ * The output frame will have the same packed format as the palette.
+ *
+ * @param src source frame buffer
+ * @param dst destination frame buffer
+ * @param num_pixels number of pixels to convert
+ * @param palette array with [256] entries, which must match color arrangement (RGB or BGR) of src
+ */
+void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette);
+
+/**
+ * Converts an 8bit paletted frame into a frame with a color depth of 24 bits.
+ *
+ * With the palette format "ABCD", the destination frame ends up with the format "ABC".
+ *
+ * @param src source frame buffer
+ * @param dst destination frame buffer
+ * @param num_pixels number of pixels to convert
+ * @param palette array with [256] entries, which must match color arrangement (RGB or BGR) of src
+ */
+void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette);
+
+
+#endif /* SWSCALE_SWSCALE_H */
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