[FFmpeg-cvslog] vp56: Check for missing reference frame data

Laurent Aimar git at videolan.org
Fri Oct 7 03:49:16 CEST 2011


ffmpeg | branch: master | Laurent Aimar <fenrir at videolan.org> | Wed Sep 21 20:46:30 2011 +0200| [0ec6d6e9b682318b5b5b5457e09fbf3c4ca41335] | committer: Janne Grunau

vp56: Check for missing reference frame data

Signed-off-by: Janne Grunau <janne-libav at jannau.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0ec6d6e9b682318b5b5b5457e09fbf3c4ca41335
---

 libavcodec/vp56.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/libavcodec/vp56.c b/libavcodec/vp56.c
index 5c7e93e..530b890 100644
--- a/libavcodec/vp56.c
+++ b/libavcodec/vp56.c
@@ -401,6 +401,8 @@ static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
 
     frame_current = s->framep[VP56_FRAME_CURRENT];
     frame_ref = s->framep[ref_frame];
+    if (mb_type != VP56_MB_INTRA && !frame_ref->data[0])
+        return;
 
     ab = 6*is_alpha;
     b_max = 6 - 2*is_alpha;



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