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godot/thirdparty/libtheora/encfrag.c
Rémi Verschelde cfcc8a20e8 theora: Move to a module and split thirdparty lib 
Same rationale as the previous commits.
2016-10-15 11:50:41 +02:00

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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: encfrag.c 16503 2009-08-22 18:14:02Z giles $
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include "encint.h"
void oc_enc_frag_sub(const oc_enc_ctx *_enc,ogg_int16_t _diff[64],
const unsigned char *_src,const unsigned char *_ref,int _ystride){
(*_enc->opt_vtable.frag_sub)(_diff,_src,_ref,_ystride);
}
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(const oc_enc_ctx *_enc,ogg_int16_t _diff[64],
const unsigned char *_src,int _ystride){
(*_enc->opt_vtable.frag_sub_128)(_diff,_src,_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(const oc_enc_ctx *_enc,const unsigned char *_x,
const unsigned char *_y,int _ystride){
return (*_enc->opt_vtable.frag_sad)(_x,_y,_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(const oc_enc_ctx *_enc,
const unsigned char *_src,const unsigned char *_ref,int _ystride,
unsigned _thresh){
return (*_enc->opt_vtable.frag_sad_thresh)(_src,_ref,_ystride,_thresh);
}
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(const oc_enc_ctx *_enc,
const unsigned char *_src,const unsigned char *_ref1,
const unsigned char *_ref2,int _ystride,unsigned _thresh){
return (*_enc->opt_vtable.frag_sad2_thresh)(_src,_ref1,_ref2,_ystride,
_thresh);
}
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;
}
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_thresh(const ogg_int16_t _buf[64],unsigned _thresh){
unsigned sad;
int t0;
int t1;
int t2;
int t3;
int t4;
int t5;
int t6;
int t7;
int r;
int i;
sad=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);
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;
if(sad>_thresh)break;
}
return sad;
}
unsigned oc_enc_frag_satd_thresh(const oc_enc_ctx *_enc,
const unsigned char *_src,const unsigned char *_ref,int _ystride,
unsigned _thresh){
return (*_enc->opt_vtable.frag_satd_thresh)(_src,_ref,_ystride,_thresh);
}
unsigned oc_enc_frag_satd_thresh_c(const unsigned char *_src,
const unsigned char *_ref,int _ystride,unsigned _thresh){
ogg_int16_t buf[64];
oc_diff_hadamard(buf,_src,_ref,_ystride);
return oc_hadamard_sad_thresh(buf,_thresh);
}
unsigned oc_enc_frag_satd2_thresh(const oc_enc_ctx *_enc,
const unsigned char *_src,const unsigned char *_ref1,
const unsigned char *_ref2,int _ystride,unsigned _thresh){
return (*_enc->opt_vtable.frag_satd2_thresh)(_src,_ref1,_ref2,_ystride,
_thresh);
}
unsigned oc_enc_frag_satd2_thresh_c(const unsigned char *_src,
const unsigned char *_ref1,const unsigned char *_ref2,int _ystride,
unsigned _thresh){
ogg_int16_t buf[64];
oc_diff_hadamard2(buf,_src,_ref1,_ref2,_ystride);
return oc_hadamard_sad_thresh(buf,_thresh);
}
unsigned oc_enc_frag_intra_satd(const oc_enc_ctx *_enc,
const unsigned char *_src,int _ystride){
return (*_enc->opt_vtable.frag_intra_satd)(_src,_ystride);
}
unsigned oc_enc_frag_intra_satd_c(const unsigned char *_src,int _ystride){
ogg_int16_t buf[64];
oc_intra_hadamard(buf,_src,_ystride);
return oc_hadamard_sad_thresh(buf,UINT_MAX)
-abs(buf[0]+buf[1]+buf[2]+buf[3]+buf[4]+buf[5]+buf[6]+buf[7]);
}
void oc_enc_frag_copy2(const oc_enc_ctx *_enc,unsigned char *_dst,
const unsigned char *_src1,const unsigned char *_src2,int _ystride){
(*_enc->opt_vtable.frag_copy2)(_dst,_src1,_src2,_ystride);
}
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;
}
}
void oc_enc_frag_recon_intra(const oc_enc_ctx *_enc,
unsigned char *_dst,int _ystride,const ogg_int16_t _residue[64]){
(*_enc->opt_vtable.frag_recon_intra)(_dst,_ystride,_residue);
}
void oc_enc_frag_recon_inter(const oc_enc_ctx *_enc,unsigned char *_dst,
const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]){
(*_enc->opt_vtable.frag_recon_inter)(_dst,_src,_ystride,_residue);
}
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