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Factorize ff_generate_sliding_window_mmcos() out.

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Originally committed as revision 24056 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-07-05 12:42:19 +00:00
parent 6fa197e277
commit 733f5990d0
2 changed files with 21 additions and 14 deletions
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2
libavcodec/h264.h
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@ -666,6 +666,8 @@ int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
void ff_generate_sliding_window_mmcos(H264Context *h);
/**
* Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.

33
libavcodec/h264_refs.c
View File

@ -474,6 +474,24 @@ static void print_long_term(H264Context *h) {
}
}
void ff_generate_sliding_window_mmcos(H264Context *h) {
MpegEncContext * const s = &h->s;
assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
!(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
h->mmco[0].opcode= MMCO_SHORT2UNUSED;
h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
h->mmco_index= 1;
if (FIELD_PICTURE) {
h->mmco[0].short_pic_num *= 2;
h->mmco[1].opcode= MMCO_SHORT2UNUSED;
h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
h->mmco_index= 2;
}
}
}
int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
MpegEncContext * const s = &h->s;
int i, av_uninit(j);
@ -673,20 +691,7 @@ int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
}
h->mmco_index= i;
}else{
assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
!(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
h->mmco[0].opcode= MMCO_SHORT2UNUSED;
h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
h->mmco_index= 1;
if (FIELD_PICTURE) {
h->mmco[0].short_pic_num *= 2;
h->mmco[1].opcode= MMCO_SHORT2UNUSED;
h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
h->mmco_index= 2;
}
}
ff_generate_sliding_window_mmcos(h);
}
}