[FFmpeg-cvslog] rv34: check that subsequent slices have the same type as first one.
Kostya Shishkov
git at videolan.org
Thu Nov 3 03:57:39 CET 2011
ffmpeg | branch: release/0.5 | Kostya Shishkov <kostya.shishkov at gmail.com> | Mon Sep 12 11:39:53 2011 +0200| [d8439f045220119d718968cf1023f5cd8182f877] | committer: Michael Niedermayer
rv34: check that subsequent slices have the same type as first one.
This prevents some crashes when corrupted bitstream reports e.g. P-type
slice in I-frame. Official RealVideo decoder demands all slices to be
of the same type too.
Signed-off-by: Anton Khirnov <anton at khirnov.net>
(cherry picked from commit 23a1f0c59241465ba30103388029a7afc0ead909)
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d8439f045220119d718968cf1023f5cd8182f877
---
libavcodec/rv34.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index 13415e0..da20dbb 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -1269,6 +1269,13 @@ static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int
r->next_pts = r->cur_pts;
}
s->mb_x = s->mb_y = 0;
+ } else {
+ int slice_type = r->si.type ? r->si.type : FF_I_TYPE;
+
+ if (slice_type != s->pict_type) {
+ av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
+ return AVERROR_INVALIDDATA;
+ }
}
r->si.end = end;
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