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avcodec/mpeg12dec: Check chroma_format 

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-08-12 22:26:41 +02:00
parent 0d2a62d257
commit 1f86079376
1 changed files with 7 additions and 0 deletions
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7
libavcodec/mpeg12dec.c
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@ -1384,6 +1384,7 @@ static int mpeg_decode_postinit(AVCodecContext *avctx)
case 1: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
case 2:
case 3: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
default: av_assert0(0);
}
} // MPEG-2
@ -1466,6 +1467,12 @@ static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
s->avctx->level = get_bits(&s->gb, 4);
s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
if (!s->chroma_format) {
s->chroma_format = 1;
av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
}
horiz_size_ext = get_bits(&s->gb, 2);
vert_size_ext = get_bits(&s->gb, 2);
s->width |= (horiz_size_ext << 12);