[FFmpeg-cvslog] vc1dec: Don't decode slices when the latest slice header failed to decode
Michael Niedermayer
git at videolan.org
Mon Sep 23 14:09:12 CEST 2013
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue Feb 19 21:40:09 2013 +0100| [bb7bf175951475235ee7d0504198c4a30cf5d5dd] | committer: Martin Storsjö
vc1dec: Don't decode slices when the latest slice header failed to decode
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable at libav.org
Signed-off-by: Martin Storsjö <martin at martin.st>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bb7bf175951475235ee7d0504198c4a30cf5d5dd
---
libavcodec/vc1dec.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 4fcc818..602b155 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -5972,6 +5972,8 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
if (avctx->hwaccel->end_frame(avctx) < 0)
goto err;
} else {
+ int header_ret = 0;
+
ff_mpeg_er_frame_start(s);
v->bits = buf_size * 8;
@@ -6009,18 +6011,20 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
if (i) {
v->pic_header_flag = 0;
if (v->field_mode && i == n_slices1 + 2) {
- if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
+ if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");
continue;
}
} else if (get_bits1(&s->gb)) {
v->pic_header_flag = 1;
- if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
+ if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
continue;
}
}
}
+ if (header_ret < 0)
+ continue;
s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);
if (!v->field_mode || v->second_field)
s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
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