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h264: move resolution change check further up. 

This prevents some variables from being changed in case of a
rejected resolution change.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-03-24 16:23:40 +01:00
parent 9d3032b960
commit 9a57a37b70
1 changed files with 15 additions and 10 deletions
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25
libavcodec/h264.c
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@ -2857,6 +2857,7 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
unsigned int slice_type, tmp, i, j;
int default_ref_list_done = 0;
int last_pic_structure, last_pic_dropable;
int must_reinit;
/* FIXME: 2tap qpel isn't implemented for high bit depth. */
if ((s->avctx->flags2 & CODEC_FLAG2_FAST) &&
@ -2935,6 +2936,19 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
s->avctx->level = h->sps.level_idc;
s->avctx->refs = h->sps.ref_frame_count;
must_reinit = (s->context_initialized &&
( 16*h->sps.mb_width != s->avctx->coded_width
|| 16*h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) != s->avctx->coded_height
|| s->avctx->bits_per_raw_sample != h->sps.bit_depth_luma
|| h->cur_chroma_format_idc != h->sps.chroma_format_idc
|| av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio)));
if(must_reinit && (h != h0 || (s->avctx->active_thread_type & FF_THREAD_FRAME))) {
av_log_missing_feature(s->avctx,
"Width/height/bit depth/chroma idc changing with threads is", 0);
return -1; // width / height changed during parallelized decoding
}
s->mb_width = h->sps.mb_width;
s->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
@ -2946,16 +2960,7 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
s->height = 16 * s->mb_height;
if (s->context_initialized &&
( s->width != s->avctx->coded_width || s->height != s->avctx->coded_height
|| s->avctx->bits_per_raw_sample != h->sps.bit_depth_luma
|| h->cur_chroma_format_idc != h->sps.chroma_format_idc
|| av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
if(h != h0 || (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
av_log_missing_feature(s->avctx,
"Width/height/bit depth/chroma idc changing with threads is", 0);
return -1; // width / height changed during parallelized decoding
}
if(must_reinit) {
free_tables(h, 0);
flush_dpb(s->avctx);
ff_MPV_common_end(s);