[FFmpeg-cvslog] iff: check if there is extradata
Paul B Mahol
git at videolan.org
Wed May 30 10:18:38 CEST 2012
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Wed May 30 07:50:32 2012 +0000| [8f61526978697e51d3b9e61ea84daf13c42717af] | committer: Paul B Mahol
iff: check if there is extradata
Fixes #1368.
Signed-off-by: Paul B Mahol <onemda at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8f61526978697e51d3b9e61ea84daf13c42717af
---
libavcodec/iff.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libavcodec/iff.c b/libavcodec/iff.c
index 8946bf9..90cafbd 100644
--- a/libavcodec/iff.c
+++ b/libavcodec/iff.c
@@ -316,7 +316,12 @@ static av_cold int decode_init(AVCodecContext *avctx)
int err;
if (avctx->bits_per_coded_sample <= 8) {
- int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
+ int palette_size;
+
+ if (avctx->extradata_size >= 2)
+ palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
+ else
+ palette_size = 0;
avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
(avctx->extradata_size >= 2 && palette_size) ? PIX_FMT_PAL8 : PIX_FMT_GRAY8;
} else if (avctx->bits_per_coded_sample <= 32) {
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