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hexagon search

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dia_size=512 + hexagon size (513 is the normal one used in h264)
large to small diamond search
        dia_size=256 + diamond size

Originally committed as revision 7204 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-12-02 10:45:51 +00:00
parent 4b47d258f6
commit 376edfcc0f
1 changed files with 78 additions and 19 deletions
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97
libavcodec/motion_est_template.c
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@ -658,6 +658,79 @@ if(256*256*256*64 % (stats[0]+1)==0){
return dmin;
}
static int hex_search(MpegEncContext * s, int *best, int dmin,
int src_index, int ref_index, int const penalty_factor,
int size, int h, int flags, int dia_size)
{
MotionEstContext * const c= &s->me;
me_cmp_func cmpf, chroma_cmpf;
LOAD_COMMON
LOAD_COMMON2
int map_generation= c->map_generation;
int x,y,i,d;
static const int hex[6][2]={{-2, 0}, { 2,0}, {-1,-2}, {1,-2}, {-1,2},{1,2}};
cmpf= s->dsp.me_cmp[size];
chroma_cmpf= s->dsp.me_cmp[size+1];
for(;dia_size; dia_size--){
do{
x= best[0];
y= best[1];
for(i=0; i<6; i++){
CHECK_CLIPED_MV(x+hex[i][0]*dia_size, y+hex[i][1]*dia_size);
}
}while(best[0] != x || best[1] != y);
}
do{
x= best[0];
y= best[1];
CHECK_CLIPED_MV(x+1, y);
CHECK_CLIPED_MV(x, y+1);
CHECK_CLIPED_MV(x-1, y);
CHECK_CLIPED_MV(x, y-1);
}while(best[0] != x || best[1] != y);
return dmin;
}
static int l2s_dia_search(MpegEncContext * s, int *best, int dmin,
int src_index, int ref_index, int const penalty_factor,
int size, int h, int flags)
{
MotionEstContext * const c= &s->me;
me_cmp_func cmpf, chroma_cmpf;
LOAD_COMMON
LOAD_COMMON2
int map_generation= c->map_generation;
int x,y,i,d, dia_size;
static const int hex[8][2]={{-2, 0}, {-1,-1}, { 0,-2}, { 1,-1},
{ 2, 0}, { 1, 1}, { 0, 2}, {-1, 1}};
cmpf= s->dsp.me_cmp[size];
chroma_cmpf= s->dsp.me_cmp[size+1];
for(dia_size= c->dia_size&0xFF; dia_size; dia_size--){
do{
x= best[0];
y= best[1];
for(i=0; i<8; i++){
CHECK_CLIPED_MV(x+hex[i][0]*dia_size, y+hex[i][1]*dia_size);
}
}while(best[0] != x || best[1] != y);
}
x= best[0];
y= best[1];
CHECK_CLIPED_MV(x+1, y);
CHECK_CLIPED_MV(x, y+1);
CHECK_CLIPED_MV(x-1, y);
CHECK_CLIPED_MV(x, y-1);
return dmin;
}
static int umh_search(MpegEncContext * s, int *best, int dmin,
int src_index, int ref_index, int const penalty_factor,
int size, int h, int flags)
@ -672,7 +745,6 @@ static int umh_search(MpegEncContext * s, int *best, int dmin,
{ 4,-2}, { 4,-1}, { 4, 0}, { 4, 1}, { 4, 2},
{-2, 3}, { 0, 4}, { 2, 3},
{-2,-3}, { 0,-4}, { 2,-3},};
static const int hex2[6][2]={{-2, 0}, { 2,0}, {-1,-2}, {1,-2}, {-1,2},{1,2}};
cmpf= s->dsp.me_cmp[size];
chroma_cmpf= s->dsp.me_cmp[size+1];
@ -702,24 +774,7 @@ static int umh_search(MpegEncContext * s, int *best, int dmin,
}
}
do{
x= best[0];
y= best[1];
for(i=0; i<6; i++){
CHECK_CLIPED_MV(x+hex2[i][0], y+hex2[i][1]);
}
}while(best[0] != x || best[1] != y);
do{
x= best[0];
y= best[1];
CHECK_CLIPED_MV(x+1, y);
CHECK_CLIPED_MV(x, y+1);
CHECK_CLIPED_MV(x-1, y);
CHECK_CLIPED_MV(x, y-1);
}while(best[0] != x || best[1] != y);
return dmin;
return hex_search(s, best, dmin, src_index, ref_index, penalty_factor, size, h, flags, 1);
}
#define SAB_CHECK_MV(ax,ay)\
@ -919,6 +974,10 @@ static always_inline int diamond_search(MpegEncContext * s, int *best, int dmin,
return sab_diamond_search(s, best, dmin, src_index, ref_index, penalty_factor, size, h, flags);
else if(c->dia_size<2)
return small_diamond_search(s, best, dmin, src_index, ref_index, penalty_factor, size, h, flags);
else if(c->dia_size>512)
return hex_search(s, best, dmin, src_index, ref_index, penalty_factor, size, h, flags, c->dia_size&0xFF);
else if(c->dia_size>256)
return l2s_dia_search(s, best, dmin, src_index, ref_index, penalty_factor, size, h, flags);
else
return var_diamond_search(s, best, dmin, src_index, ref_index, penalty_factor, size, h, flags);
}