[FFmpeg-cvslog] r19359 - trunk/libavcodec/indeo3.c

[reimar]

Author: reimar
Date: Mon Jul  6 18:48:23 2009
New Revision: 19359

Log:
Reallocate internal buffer when coded frame size changes.
Fixes out-of-bounds reads and writes with i32/smclocki32.avi.1.0 from issue 1240.

Modified:
   trunk/libavcodec/indeo3.c

Modified: trunk/libavcodec/indeo3.c
==============================================================================
--- trunk/libavcodec/indeo3.c	Mon Jul  6 18:45:12 2009	(r19358)
+++ trunk/libavcodec/indeo3.c	Mon Jul  6 18:48:23 2009	(r19359)
@@ -107,6 +107,7 @@ static av_cold int iv_alloc_frames(Indeo
     unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
                           (chroma_pixels   + chroma_width) * 4;
 
+    av_freep(&s->buf);
     if(!(s->buf = av_malloc(bufsize)))
         return AVERROR(ENOMEM);
     s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
@@ -997,6 +998,17 @@ static int iv_decode_frame(AVCodecContex
 
     if(avcodec_check_dimensions(avctx, image_width, image_height))
         return -1;
+    if (image_width != avctx->width || image_height != avctx->height) {
+        int ret;
+        avcodec_set_dimensions(avctx, image_width, image_height);
+        s->width  = avctx->width;
+        s->height = avctx->height;
+        ret = iv_alloc_frames(s);
+        if (ret < 0) {
+            s->width = s->height = 0;
+            return ret;
+        }
+    }
 
     chroma_height = ((image_height >> 2) + 3) & 0x7ffc;
     chroma_width = ((image_width >> 2) + 3) & 0x7ffc;