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Check for VUI overeading and reset num_reoder_frames. 

This helps the video from issue1831

Originally committed as revision 23328 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-05-25 21:51:27 +00:00
parent 577ee94871
commit f4348e6cce
1 changed files with 6 additions and 0 deletions
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6
libavcodec/h264_ps.c
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@ -205,6 +205,12 @@ static inline int decode_vui_parameters(H264Context *h, SPS *sps){
sps->num_reorder_frames= get_ue_golomb(&s->gb); sps->num_reorder_frames= get_ue_golomb(&s->gb);
get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/ get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/
if(s->gb.size_in_bits < get_bits_count(&s->gb)){
av_log(h->s.avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
sps->num_reorder_frames=0;
sps->bitstream_restriction_flag= 0;
}
if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){ if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames); av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
return -1; return -1;