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godot/thirdparty/libtheora/encfrag.c
DeeJayLSP b87584a070 Update libtheora to GIT (2020.10)
2022-10-18 21:15:13 -03:00

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C
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function:
last mod: $Id$
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include "encint.h"
void oc_enc_frag_sub_c(ogg_int16_t _diff[64],const unsigned char *_src,
const unsigned char *_ref,int _ystride){
int i;
for(i=0;i<8;i++){
int j;
for(j=0;j<8;j++)_diff[i*8+j]=(ogg_int16_t)(_src[j]-_ref[j]);
_src+=_ystride;
_ref+=_ystride;
}
}
void oc_enc_frag_sub_128_c(ogg_int16_t *_diff,
const unsigned char *_src,int _ystride){
int i;
for(i=0;i<8;i++){
int j;
for(j=0;j<8;j++)_diff[i*8+j]=(ogg_int16_t)(_src[j]-128);
_src+=_ystride;
}
}
unsigned oc_enc_frag_sad_c(const unsigned char *_src,
const unsigned char *_ref,int _ystride){
unsigned sad;
int i;
sad=0;
for(i=8;i-->0;){
int j;
for(j=0;j<8;j++)sad+=abs(_src[j]-_ref[j]);
_src+=_ystride;
_ref+=_ystride;
}
return sad;
}
unsigned oc_enc_frag_sad_thresh_c(const unsigned char *_src,
const unsigned char *_ref,int _ystride,unsigned _thresh){
unsigned sad;
int i;
sad=0;
for(i=8;i-->0;){
int j;
for(j=0;j<8;j++)sad+=abs(_src[j]-_ref[j]);
if(sad>_thresh)break;
_src+=_ystride;
_ref+=_ystride;
}
return sad;
}
unsigned oc_enc_frag_sad2_thresh_c(const unsigned char *_src,
const unsigned char *_ref1,const unsigned char *_ref2,int _ystride,
unsigned _thresh){
unsigned sad;
int i;
sad=0;
for(i=8;i-->0;){
int j;
for(j=0;j<8;j++)sad+=abs(_src[j]-(_ref1[j]+_ref2[j]>>1));
if(sad>_thresh)break;
_src+=_ystride;
_ref1+=_ystride;
_ref2+=_ystride;
}
return sad;
}
unsigned oc_enc_frag_intra_sad_c(const unsigned char *_src, int _ystride){
const unsigned char *src = _src;
unsigned dc;
unsigned sad;
int i;
dc=0;
for(i=8;i-->0;){
int j;
for(j=0;j<8;j++)dc+=src[j];
src+=_ystride;
}
dc=dc+32>>6;
sad=0;
for(i=8;i-->0;){
int j;
for(j=0;j<8;j++)sad+=abs(_src[j]-dc);
_src+=_ystride;
}
return sad;
}
static void oc_diff_hadamard(ogg_int16_t _buf[64],const unsigned char *_src,
const unsigned char *_ref,int _ystride){
int i;
for(i=0;i<8;i++){
int t0;
int t1;
int t2;
int t3;
int t4;
int t5;
int t6;
int t7;
int r;
/*Hadamard stage 1:*/
t0=_src[0]-_ref[0]+_src[4]-_ref[4];
t4=_src[0]-_ref[0]-_src[4]+_ref[4];
t1=_src[1]-_ref[1]+_src[5]-_ref[5];
t5=_src[1]-_ref[1]-_src[5]+_ref[5];
t2=_src[2]-_ref[2]+_src[6]-_ref[6];
t6=_src[2]-_ref[2]-_src[6]+_ref[6];
t3=_src[3]-_ref[3]+_src[7]-_ref[7];
t7=_src[3]-_ref[3]-_src[7]+_ref[7];
/*Hadamard stage 2:*/
r=t0;
t0+=t2;
t2=r-t2;
r=t1;
t1+=t3;
t3=r-t3;
r=t4;
t4+=t6;
t6=r-t6;
r=t5;
t5+=t7;
t7=r-t7;
/*Hadamard stage 3:*/
_buf[0*8+i]=(ogg_int16_t)(t0+t1);
_buf[1*8+i]=(ogg_int16_t)(t0-t1);
_buf[2*8+i]=(ogg_int16_t)(t2+t3);
_buf[3*8+i]=(ogg_int16_t)(t2-t3);
_buf[4*8+i]=(ogg_int16_t)(t4+t5);
_buf[5*8+i]=(ogg_int16_t)(t4-t5);
_buf[6*8+i]=(ogg_int16_t)(t6+t7);
_buf[7*8+i]=(ogg_int16_t)(t6-t7);
_src+=_ystride;
_ref+=_ystride;
}
}
static void oc_diff_hadamard2(ogg_int16_t _buf[64],const unsigned char *_src,
const unsigned char *_ref1,const unsigned char *_ref2,int _ystride){
int i;
for(i=0;i<8;i++){
int t0;
int t1;
int t2;
int t3;
int t4;
int t5;
int t6;
int t7;
int r;
/*Hadamard stage 1:*/
r=_ref1[0]+_ref2[0]>>1;
t4=_ref1[4]+_ref2[4]>>1;
t0=_src[0]-r+_src[4]-t4;
t4=_src[0]-r-_src[4]+t4;
r=_ref1[1]+_ref2[1]>>1;
t5=_ref1[5]+_ref2[5]>>1;
t1=_src[1]-r+_src[5]-t5;
t5=_src[1]-r-_src[5]+t5;
r=_ref1[2]+_ref2[2]>>1;
t6=_ref1[6]+_ref2[6]>>1;
t2=_src[2]-r+_src[6]-t6;
t6=_src[2]-r-_src[6]+t6;
r=_ref1[3]+_ref2[3]>>1;
t7=_ref1[7]+_ref2[7]>>1;
t3=_src[3]-r+_src[7]-t7;
t7=_src[3]-r-_src[7]+t7;
/*Hadamard stage 2:*/
r=t0;
t0+=t2;
t2=r-t2;
r=t1;
t1+=t3;
t3=r-t3;
r=t4;
t4+=t6;
t6=r-t6;
r=t5;
t5+=t7;
t7=r-t7;
/*Hadamard stage 3:*/
_buf[0*8+i]=(ogg_int16_t)(t0+t1);
_buf[1*8+i]=(ogg_int16_t)(t0-t1);
_buf[2*8+i]=(ogg_int16_t)(t2+t3);
_buf[3*8+i]=(ogg_int16_t)(t2-t3);
_buf[4*8+i]=(ogg_int16_t)(t4+t5);
_buf[5*8+i]=(ogg_int16_t)(t4-t5);
_buf[6*8+i]=(ogg_int16_t)(t6+t7);
_buf[7*8+i]=(ogg_int16_t)(t6-t7);
_src+=_ystride;
_ref1+=_ystride;
_ref2+=_ystride;
}
}
static void oc_intra_hadamard(ogg_int16_t _buf[64],const unsigned char *_src,
int _ystride){
int i;
for(i=0;i<8;i++){
int t0;
int t1;
int t2;
int t3;
int t4;
int t5;
int t6;
int t7;
int r;
/*Hadamard stage 1:*/
t0=_src[0]+_src[4];
t4=_src[0]-_src[4];
t1=_src[1]+_src[5];
t5=_src[1]-_src[5];
t2=_src[2]+_src[6];
t6=_src[2]-_src[6];
t3=_src[3]+_src[7];
t7=_src[3]-_src[7];
/*Hadamard stage 2:*/
r=t0;
t0+=t2;
t2=r-t2;
r=t1;
t1+=t3;
t3=r-t3;
r=t4;
t4+=t6;
t6=r-t6;
r=t5;
t5+=t7;
t7=r-t7;
/*Hadamard stage 3:*/
_buf[0*8+i]=(ogg_int16_t)(t0+t1);
_buf[1*8+i]=(ogg_int16_t)(t0-t1);
_buf[2*8+i]=(ogg_int16_t)(t2+t3);
_buf[3*8+i]=(ogg_int16_t)(t2-t3);
_buf[4*8+i]=(ogg_int16_t)(t4+t5);
_buf[5*8+i]=(ogg_int16_t)(t4-t5);
_buf[6*8+i]=(ogg_int16_t)(t6+t7);
_buf[7*8+i]=(ogg_int16_t)(t6-t7);
_src+=_ystride;
}
}
unsigned oc_hadamard_sad(int *_dc,const ogg_int16_t _buf[64]){
unsigned sad;
int dc;
int t0;
int t1;
int t2;
int t3;
int t4;
int t5;
int t6;
int t7;
int r;
int i;
sad=dc=0;
for(i=0;i<8;i++){
/*Hadamard stage 1:*/
t0=_buf[i*8+0]+_buf[i*8+4];
t4=_buf[i*8+0]-_buf[i*8+4];
t1=_buf[i*8+1]+_buf[i*8+5];
t5=_buf[i*8+1]-_buf[i*8+5];
t2=_buf[i*8+2]+_buf[i*8+6];
t6=_buf[i*8+2]-_buf[i*8+6];
t3=_buf[i*8+3]+_buf[i*8+7];
t7=_buf[i*8+3]-_buf[i*8+7];
/*Hadamard stage 2:*/
r=t0;
t0+=t2;
t2=r-t2;
r=t1;
t1+=t3;
t3=r-t3;
r=t4;
t4+=t6;
t6=r-t6;
r=t5;
t5+=t7;
t7=r-t7;
/*Hadamard stage 3:*/
r=abs(t0+t1)&-(i>0);
r+=abs(t0-t1);
r+=abs(t2+t3);
r+=abs(t2-t3);
r+=abs(t4+t5);
r+=abs(t4-t5);
r+=abs(t6+t7);
r+=abs(t6-t7);
sad+=r;
}
dc=_buf[0]+_buf[1]+_buf[2]+_buf[3]+_buf[4]+_buf[5]+_buf[6]+_buf[7];
*_dc=dc;
return sad;
}
unsigned oc_enc_frag_satd_c(int *_dc,const unsigned char *_src,
const unsigned char *_ref,int _ystride){
ogg_int16_t buf[64];
oc_diff_hadamard(buf,_src,_ref,_ystride);
return oc_hadamard_sad(_dc,buf);
}
unsigned oc_enc_frag_satd2_c(int *_dc,const unsigned char *_src,
const unsigned char *_ref1,const unsigned char *_ref2,int _ystride){
ogg_int16_t buf[64];
oc_diff_hadamard2(buf,_src,_ref1,_ref2,_ystride);
return oc_hadamard_sad(_dc,buf);
}
unsigned oc_enc_frag_intra_satd_c(int *_dc,
const unsigned char *_src,int _ystride){
ogg_int16_t buf[64];
oc_intra_hadamard(buf,_src,_ystride);
return oc_hadamard_sad(_dc,buf);
}
unsigned oc_enc_frag_ssd_c(const unsigned char *_src,
const unsigned char *_ref,int _ystride){
unsigned ret;
int y;
int x;
ret=0;
for(y=0;y<8;y++){
for(x=0;x<8;x++)ret+=(_src[x]-_ref[x])*(_src[x]-_ref[x]);
_src+=_ystride;
_ref+=_ystride;
}
return ret;
}
unsigned oc_enc_frag_border_ssd_c(const unsigned char *_src,
const unsigned char *_ref,int _ystride,ogg_int64_t _mask){
unsigned ret;
int y;
int x;
ret=0;
for(y=0;y<8;y++){
for(x=0;x<8;x++,_mask>>=1){
if(_mask&1)ret+=(_src[x]-_ref[x])*(_src[x]-_ref[x]);
}
_src+=_ystride;
_ref+=_ystride;
}
return ret;
}
void oc_enc_frag_copy2_c(unsigned char *_dst,
const unsigned char *_src1,const unsigned char *_src2,int _ystride){
int i;
int j;
for(i=8;i-->0;){
for(j=0;j<8;j++)_dst[j]=_src1[j]+_src2[j]>>1;
_dst+=_ystride;
_src1+=_ystride;
_src2+=_ystride;
}
}
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