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h264: check chroma_format_idc range. 

Fixes Ticket758
Bug found by: Diana Elena Muscalu

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-15 02:43:03 +01:00
parent cd645c15d8
commit 7fff64e00d
1 changed files with 4 additions and 0 deletions
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4
libavcodec/h264_ps.c
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@ -347,6 +347,10 @@ int ff_h264_decode_seq_parameter_set(H264Context *h){
if(sps->profile_idc >= 100){ //high profile
sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
if (sps->chroma_format_idc > 3U) {
av_log(h->s.avctx, AV_LOG_ERROR, "chroma_format_idc %d is illegal\n", sps->chroma_format_idc);
goto fail;
}
if(sps->chroma_format_idc == 3)
sps->residual_color_transform_flag = get_bits1(&s->gb);
sps->bit_depth_luma = get_ue_golomb(&s->gb) + 8;