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Code Issues Releases Activity

Make MBAFF temporal direct mode closer to the spec.

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Fixes at least:
CAMANL2_TOSHIBA_B
CVMANL2_TOSHIBA_B
camp_mot_mbaff0_full

Originally committed as revision 15375 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-09-21 02:39:09 +00:00
parent 8f56e219b2
commit 8b1fd554e1
2 changed files with 44 additions and 31 deletions
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71
libavcodec/h264.c
View File

@ -894,34 +894,39 @@ static inline void pred_pskip_motion(H264Context * const h, int * const mx, int
return;
}
static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
int poc0 = h->ref_list[0][i].poc;
int td = av_clip(poc1 - poc0, -128, 127);
if(td == 0 || h->ref_list[0][i].long_ref){
return 256;
}else{
int tb = av_clip(poc - poc0, -128, 127);
int tx = (16384 + (FFABS(td) >> 1)) / td;
return av_clip((tb*tx + 32) >> 6, -1024, 1023);
}
}
static inline void direct_dist_scale_factor(H264Context * const h){
MpegEncContext * const s = &h->s;
const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
const int poc1 = h->ref_list[1][0].poc;
int i;
for(i=0; i<h->ref_count[0]; i++){
int poc0 = h->ref_list[0][i].poc;
int td = av_clip(poc1 - poc0, -128, 127);
if(td == 0 || h->ref_list[0][i].long_ref){
h->dist_scale_factor[i] = 256;
}else{
int tb = av_clip(poc - poc0, -128, 127);
int tx = (16384 + (FFABS(td) >> 1)) / td;
h->dist_scale_factor[i] = av_clip((tb*tx + 32) >> 6, -1024, 1023);
}
int i, field;
for(field=0; field<2; field++){
const int poc = h->s.current_picture_ptr->field_poc[field];
const int poc1 = h->ref_list[1][0].field_poc[field];
for(i=0; i < 2*h->ref_count[0]; i++)
h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
}
if(FRAME_MBAFF){
for(i=0; i<h->ref_count[0]; i++){
h->dist_scale_factor_field[2*i] =
h->dist_scale_factor_field[2*i+1] = h->dist_scale_factor[i];
}
for(i=0; i<h->ref_count[0]; i++){
h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
}
}
static inline void direct_ref_list_init(H264Context * const h){
MpegEncContext * const s = &h->s;
Picture * const ref1 = &h->ref_list[1][0];
Picture * const cur = s->current_picture_ptr;
int list, i, j;
int list, i, j, field, rfield;
int sidx= s->picture_structure&1;
int ref1sidx= ref1->reference&1;
for(list=0; list<2; list++){
@ -936,6 +941,23 @@ static inline void direct_ref_list_init(H264Context * const h){
if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
return;
for(list=0; list<2; list++){
for(field=0; field<2; field++){
for(i=0; i<ref1->ref_count[field][list]; i++){
for(rfield=0; rfield<2; rfield++){
int poc = ref1->ref_poc[field][list][i];
if((poc&3) == 3)
poc= (poc&~3) + rfield + 1;
h->map_col_to_list0_field[field][list][2*i+rfield] = 0; /* bogus; fills in for missing frames */
for(j=16; j<16+2*h->ref_count[list]; j++)
if(4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3) == poc){
h->map_col_to_list0_field[field][list][2*i+rfield] = j-16;
break;
}
}
}
}
for(i=0; i<ref1->ref_count[ref1sidx][list]; i++){
int poc = ref1->ref_poc[ref1sidx][list][i];
if(((poc&3) == 3) != (s->picture_structure == PICT_FRAME))
@ -948,15 +970,6 @@ static inline void direct_ref_list_init(H264Context * const h){
}
}
}
if(FRAME_MBAFF){
for(list=0; list<2; list++){
for(i=0; i<ref1->ref_count[ref1sidx][list]; i++){
j = h->map_col_to_list0[list][i];
h->map_col_to_list0_field[list][2*i] = 2*j;
h->map_col_to_list0_field[list][2*i+1] = 2*j+1;
}
}
}
}
static inline void pred_direct_motion(H264Context * const h, int *mb_type){
@ -1170,9 +1183,9 @@ single_col:
const int *dist_scale_factor = h->dist_scale_factor;
if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
map_col_to_list0[0] = h->map_col_to_list0_field[0];
map_col_to_list0[1] = h->map_col_to_list0_field[1];
dist_scale_factor = h->dist_scale_factor_field;
map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
dist_scale_factor =h->dist_scale_factor_field[s->mb_y&1];
}
if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
/* FIXME assumes direct_8x8_inference == 1 */

4
libavcodec/h264.h
View File

@ -331,9 +331,9 @@ typedef struct H264Context{
int direct_spatial_mv_pred;
int dist_scale_factor[16];
int dist_scale_factor_field[32];
int dist_scale_factor_field[2][32];
int map_col_to_list0[2][16];
int map_col_to_list0_field[2][32];
int map_col_to_list0_field[2][2][32];
/**
* num_ref_idx_l0/1_active_minus1 + 1