[FFmpeg-cvslog] avcodec/mpeg12dec: Set dimensions in mpeg1_decode_sequence() only in absence of errors

[Michael Niedermayer]

ffmpeg | branch: release/2.7 | Michael Niedermayer <michael at niedermayer.cc> | Tue Sep  1 02:45:10 2015 +0200| [ffcd26d25bfdb64097decae60889152012e6a84f] | committer: Michael Niedermayer

avcodec/mpeg12dec: Set dimensions in mpeg1_decode_sequence() only in absence of errors

Fixes assertion failure
Fixes: 56dcafde14a8397161bb61a16c511179/signal_sigabrt_7ffff6ac8cc9_686_cov_1897408623_microsoft_new_way_to_shove_mpeg2_in_asf.dvr_ms

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit b54e03c9dc2a05324c08b503bfe7535c49c0f281)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ffcd26d25bfdb64097decae60889152012e6a84f
---

 libavcodec/mpeg12dec.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index b0e5ae9..00ce2a4 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -2152,8 +2152,6 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
     if (check_marker(&s->gb, "in sequence header") == 0) {
         return AVERROR_INVALIDDATA;
     }
-    s->width  = width;
-    s->height = height;
 
     s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
     skip_bits(&s->gb, 1);
@@ -2185,6 +2183,9 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
         return AVERROR_INVALIDDATA;
     }
 
+    s->width  = width;
+    s->height = height;
+
     /* We set MPEG-2 parameters so that it emulates MPEG-1. */
     s->progressive_sequence = 1;
     s->progressive_frame    = 1;