From: Hector Martin <hector@marcansoft.com>
Date: Tue, 18 Jan 2011 02:33:38 +0000 (+0100)
Subject: Fix out of bounds access for empty frames
X-Git-Url: https://gitweb.aptx.org/?a=commitdiff_plain;h=3e7989891b1e8d9c70177175003e85a10988bc24;p=openlase-old.git

Fix out of bounds access for empty frames

This was causing broken float values (NaN) which kill the output
processor.
---

diff --git a/libol/libol.c b/libol/libol.c
index b755b14..eb2385c 100644
--- a/libol/libol.c
+++ b/libol/libol.c
@@ -835,8 +835,13 @@ float olRenderFrame(int max_fps)
 		last_info.resampled_points = count;
 	}
 
-	float last_x = frames[cwbuf].points[count-1].x;
-	float last_y = frames[cwbuf].points[count-1].y;
+	float last_x, last_y;
+	if (count) {
+		last_x = frames[cwbuf].points[count-1].x;
+		last_y = frames[cwbuf].points[count-1].y;
+	} else {
+		last_x = last_y = 0;
+	}
 	while(count < min_points) {
 		frames[cwbuf].points[count].x = last_x;
 		frames[cwbuf].points[count].y = last_y;