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Set context variable picture_structure in H264 parser.

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Patch by Ivan Schreter, schreter gmx net

Originally committed as revision 17490 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ivan Schreter 2009-02-21 20:03:05 +00:00 committed by Carl Eugen Hoyos
parent 0ed260c7a3
commit 96c3da93e6
1 changed files with 28 additions and 0 deletions
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28
libavcodec/h264_parser.c
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@ -112,6 +112,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
{
H264Context *h = s->priv_data;
const uint8_t *buf_end = buf + buf_size;
unsigned int pps_id;
unsigned int slice_type;
int state;
const uint8_t *ptr;
@ -164,6 +165,33 @@ static inline int parse_nal_units(AVCodecParserContext *s,
/* key frame, since recovery_frame_cnt is set */
s->key_frame = 1;
}
pps_id= get_ue_golomb(&h->s.gb);
if(pps_id>=MAX_PPS_COUNT) {
av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
return -1;
}
if(!h->pps_buffers[pps_id]) {
av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS referenced\n");
return -1;
}
h->pps= *h->pps_buffers[pps_id];
if(!h->sps_buffers[h->pps.sps_id]) {
av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS referenced\n");
return -1;
}
h->sps = *h->sps_buffers[h->pps.sps_id];
h->frame_num = get_bits(&h->s.gb, h->sps.log2_max_frame_num);
if(h->sps.frame_mbs_only_flag){
h->s.picture_structure= PICT_FRAME;
}else{
if(get_bits1(&h->s.gb)) { //field_pic_flag
h->s.picture_structure= PICT_TOP_FIELD + get_bits1(&h->s.gb); //bottom_field_flag
} else {
h->s.picture_structure= PICT_FRAME;
}
}
return 0; /* no need to evaluate the rest */
}
buf += consumed;