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289 lines
7.0 KiB
289 lines
7.0 KiB
/*
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wrapper for dcts
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Copyright (C) 2001 Martin Vogt
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as published by
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the Free Software Foundation.
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For more information look at the file COPYRIGHT in this package
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*/
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#include "dct.h"
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#include "common.h"
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ATTR_ALIGN(64) static REAL hsec_12[3];
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ATTR_ALIGN(64) static REAL cos2_6=cos(PI/6.0*2.0);
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ATTR_ALIGN(64) static REAL cos1_6=cos(PI/6.0*1.0);
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ATTR_ALIGN(64) static REAL hsec_36[9];
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ATTR_ALIGN(64) static REAL cos_18[9];
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/**
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This was some time ago a standalone dct class,
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but to get more speed I made it an inline dct
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int the filter classes
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*/
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static int dct36_12Init=false;
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void initialize_dct12_dct36() {
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if (dct36_12Init==true) {
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return;
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}
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dct36_12Init=true;
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int i;
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for(i=0;i<3;i++)
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hsec_12[i]=0.5/cos(double(i*2+1)* PI_12);
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for(i=0;i<9;i++)
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hsec_36[i]=0.5/cos(double(i*2+1)* PI_36);
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for(i=0;i<9;i++)
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cos_18[i]=cos(PI_18*double(i));
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}
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inline void dct36(REAL *inbuf,REAL *prevblk1,
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REAL *prevblk2,REAL *wi,REAL *out){
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#define MACRO0(v) { \
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REAL tmp; \
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out2[9+(v)]=(tmp=sum0+sum1)*wi[27+(v)]; \
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out2[8-(v)]=tmp * wi[26-(v)]; } \
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sum0-=sum1; \
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ts[SBLIMIT*(8-(v))]=out1[8-(v)]+sum0*wi[8-(v)]; \
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ts[SBLIMIT*(9+(v))]=out1[9+(v)]+sum0*wi[9+(v)];
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#define MACRO1(v) { \
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REAL sum0,sum1; \
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sum0=tmp1a+tmp2a; \
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sum1=(tmp1b+tmp2b)*hsec_36[(v)]; \
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MACRO0(v); }
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#define MACRO2(v) { \
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REAL sum0,sum1; \
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sum0=tmp2a-tmp1a; \
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sum1=(tmp2b-tmp1b) * hsec_36[(v)]; \
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MACRO0(v); }
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{
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REAL *in = inbuf;
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in[17]+=in[16];in[16]+=in[15];in[15]+=in[14];in[14]+=in[13];
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in[13]+=in[12];in[12]+=in[11];in[11]+=in[10];in[10]+=in[ 9];
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in[ 9]+=in[ 8];in[ 8]+=in[ 7];in[ 7]+=in[ 6];in[ 6]+=in[ 5];
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in[ 5]+=in[ 4];in[ 4]+=in[ 3];in[ 3]+=in[ 2];in[ 2]+=in[ 1];
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in[ 1]+=in[ 0];
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in[17]+=in[15];in[15]+=in[13];in[13]+=in[11];in[11]+=in[ 9];
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in[ 9]+=in[ 7];in[7] +=in[ 5];in[ 5]+=in[ 3];in[ 3]+=in[ 1];
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{
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REAL *c = cos_18;
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REAL *out2 = prevblk2;
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REAL *out1 = prevblk1;
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REAL *ts = out;
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REAL ta33,ta66,tb33,tb66;
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ta33=in[2*3+0]*c[3];
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ta66=in[2*6+0]*c[6];
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tb33=in[2*3+1]*c[3];
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tb66=in[2*6+1]*c[6];
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{
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REAL tmp1a,tmp2a,tmp1b,tmp2b;
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tmp1a= in[2*1+0]*c[1]+ta33 +in[2*5+0]*c[5]+in[2*7+0]*c[7];
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tmp1b= in[2*1+1]*c[1]+tb33 +in[2*5+1]*c[5]+in[2*7+1]*c[7];
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tmp2a=in[2*0+0]+in[2*2+0]*c[2]+in[2*4+0]*c[4]+ta66 +in[2*8+0]*c[8];
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tmp2b=in[2*0+1]+in[2*2+1]*c[2]+in[2*4+1]*c[4]+tb66 +in[2*8+1]*c[8];
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MACRO1(0);
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MACRO2(8);
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}
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{
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REAL tmp1a,tmp2a,tmp1b,tmp2b;
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tmp1a=(in[2*1+0]-in[2*5+0]-in[2*7+0])*c[3];
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tmp1b=(in[2*1+1]-in[2*5+1]-in[2*7+1])*c[3];
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tmp2a=(in[2*2+0]-in[2*4+0]-in[2*8+0])*c[6]-in[2*6+0]+in[2*0+0];
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tmp2b=(in[2*2+1]-in[2*4+1]-in[2*8+1])*c[6]-in[2*6+1]+in[2*0+1];
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MACRO1(1);
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MACRO2(7);
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}
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{
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REAL tmp1a,tmp2a,tmp1b,tmp2b;
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tmp1a= in[2*1+0]*c[5]-ta33 -in[2*5+0]*c[7]+in[2*7+0]*c[1];
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tmp1b= in[2*1+1]*c[5]-tb33 -in[2*5+1]*c[7]+in[2*7+1]*c[1];
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tmp2a=in[2*0+0]-in[2*2+0]*c[8]-in[2*4+0]*c[2]+ta66 +in[2*8+0]*c[4];
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tmp2b=in[2*0+1]-in[2*2+1]*c[8]-in[2*4+1]*c[2]+tb66 +in[2*8+1]*c[4];
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MACRO1(2);
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MACRO2(6);
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}
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{
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REAL tmp1a,tmp2a,tmp1b,tmp2b;
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tmp1a= in[2*1+0]*c[7]-ta33 +in[2*5+0]*c[1]-in[2*7+0]*c[5];
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tmp1b= in[2*1+1]*c[7]-tb33 +in[2*5+1]*c[1]-in[2*7+1]*c[5];
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tmp2a=in[2*0+0]-in[2*2+0]*c[4]+in[2*4+0]*c[8]+ta66 -in[2*8+0]*c[2];
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tmp2b=in[2*0+1]-in[2*2+1]*c[4]+in[2*4+1]*c[8]+tb66 -in[2*8+1]*c[2];
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MACRO1(3);
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MACRO2(5);
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}
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{
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REAL sum0,sum1;
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sum0= in[2*0+0]-in[2*2+0]+in[2*4+0]-in[2*6+0]+in[2*8+0];
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sum1=(in[2*0+1]-in[2*2+1]+in[2*4+1]-in[2*6+1]+in[2*8+1])*hsec_36[4];
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MACRO0(4);
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}
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}
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}
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}
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inline void dct12(REAL *in,REAL *prevblk1,REAL *prevblk2,REAL *wi,REAL *out) {
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#define DCT12_PART1 \
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in5=in[5*3]; \
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in5+=(in4=in[4*3]); \
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in4+=(in3=in[3*3]); \
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in3+=(in2=in[2*3]); \
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in2+=(in1=in[1*3]); \
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in1+=(in0=in[0*3]); \
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\
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in5+=in3;in3+=in1; \
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\
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in2*=cos1_6; \
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in3*=cos1_6;
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#define DCT12_PART2 \
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in0+=in4*cos2_6; \
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\
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in4=in0+in2; \
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in0-=in2; \
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\
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in1+=in5*cos2_6; \
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\
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in5=(in1+in3)*hsec_12[0]; \
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in1=(in1-in3)*hsec_12[2]; \
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\
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in3=in4+in5; \
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in4-=in5; \
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\
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in2=in0+in1; \
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in0-=in1;
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{
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REAL in0,in1,in2,in3,in4,in5;
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REAL *pb1=prevblk1;
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out[SBLIMIT*0]=pb1[0];out[SBLIMIT*1]=pb1[1];out[SBLIMIT*2]=pb1[2];
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out[SBLIMIT*3]=pb1[3];out[SBLIMIT*4]=pb1[4];out[SBLIMIT*5]=pb1[5];
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DCT12_PART1;
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{
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REAL tmp0,tmp1=(in0-in4);
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{
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REAL tmp2=(in1-in5)*hsec_12[1];
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tmp0=tmp1+tmp2;
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tmp1-=tmp2;
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}
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out[(17-1)*SBLIMIT]=pb1[17-1]+tmp0*wi[11-1];
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out[(12+1)*SBLIMIT]=pb1[12+1]+tmp0*wi[ 6+1];
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out[(6 +1)*SBLIMIT]=pb1[6 +1]+tmp1*wi[ 1 ];
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out[(11-1)*SBLIMIT]=pb1[11-1]+tmp1*wi[ 5-1];
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}
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DCT12_PART2;
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out[(17-0)*SBLIMIT]=pb1[17-0]+in2*wi[11-0];
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out[(12+0)*SBLIMIT]=pb1[12+0]+in2*wi[ 6+0];
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out[(12+2)*SBLIMIT]=pb1[12+2]+in3*wi[ 6+2];
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out[(17-2)*SBLIMIT]=pb1[17-2]+in3*wi[11-2];
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out[( 6+0)*SBLIMIT]=pb1[ 6+0]+in0*wi[0];
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out[(11-0)*SBLIMIT]=pb1[11-0]+in0*wi[5-0];
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out[( 6+2)*SBLIMIT]=pb1[ 6+2]+in4*wi[2];
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out[(11-2)*SBLIMIT]=pb1[11-2]+in4*wi[5-2];
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}
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in++;
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{
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REAL in0,in1,in2,in3,in4,in5;
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REAL *pb2 = prevblk2;
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DCT12_PART1;
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{
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REAL tmp0,tmp1=(in0-in4);
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{
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REAL tmp2=(in1-in5)*hsec_12[1];
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tmp0=tmp1+tmp2;
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tmp1-=tmp2;
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}
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pb2[5-1]=tmp0*wi[11-1];
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pb2[0+1]=tmp0*wi[6+1];
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out[(12+1)*SBLIMIT]+=tmp1*wi[1];
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out[(17-1)*SBLIMIT]+=tmp1*wi[5-1];
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}
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DCT12_PART2;
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pb2[5-0]=in2*wi[11-0];
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pb2[0+0]=in2*wi[6+0];
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pb2[0+2]=in3*wi[6+2];
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pb2[5-2]=in3*wi[11-2];
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out[(12+0)*SBLIMIT]+=in0*wi[0];
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out[(17-0)*SBLIMIT]+=in0*wi[5-0];
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out[(12+2)*SBLIMIT]+=in4*wi[2];
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out[(17-2)*SBLIMIT]+=in4*wi[5-2];
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}
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in++;
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{
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REAL in0,in1,in2,in3,in4,in5;
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REAL *pb2 = prevblk2;
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pb2[12]=pb2[13]=pb2[14]=pb2[15]=pb2[16]=pb2[17]=0.0;
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DCT12_PART1;
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{
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REAL tmp0,tmp1=(in0-in4);
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{
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REAL tmp2=(in1-in5)*hsec_12[1];
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tmp0=tmp1+tmp2;
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tmp1-=tmp2;
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}
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pb2[11-1]=tmp0*wi[11-1];
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pb2[ 6+1]=tmp0*wi[6+1];
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pb2[ 0+1]+=tmp1*wi[1];
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pb2[ 5-1]+=tmp1*wi[5-1];
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}
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DCT12_PART2;
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pb2[11-0]=in2*wi[11-0];
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pb2[ 6+0]=in2*wi[ 6+0];
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pb2[ 6+2]=in3*wi[ 6+2];
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pb2[11-2]=in3*wi[11-2];
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pb2[ 0+0]+=in0*wi[0 ];
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pb2[ 5-0]+=in0*wi[5-0];
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pb2[ 0+2]+=in4*wi[2 ];
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pb2[ 5-2]+=in4*wi[5-2];
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}
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}
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