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Supermodel/Src/Sound/MPEG/transform.cpp
Bart Trzynadlowski ddd6fa92ef - Improved 68K interface. Now supports context switching. 
- CSoundBoard is not derived from CBus.
- Optimized sound board memory handlers (now using switch statements).
- Added DSB emulation (based on R. Belmont's M1 source code).
- Improved ROM loading: only unique ROMs (those not shared amongst games) are used to identify games. The ROM loader will no longer get confused as easily.
- General cleanup here and there, removed unused Render.h file.
2011-07-31 02:37:31 +00:00

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/* this file is a part of amp software, (C) tomislav uzelac 1996,1997
*/
/* transform.c imdct and polyphase(DCT) transforms
*
* Created by: tomislav uzelac May 1996
* Karl Anders Oygard optimized this for speed, Mar 13 97
* Some optimisations based on ideas from Michael Hipp's mpg123 package
*/
/*
* Comments for this file:
*
* The polyphase algorithm is clearly the most cpu consuming part of mpeg 1
* layer 3 decoding. Thus, there has been some effort to optimise this
* particular algorithm. Currently, everything has been kept in straight C
* with no assembler optimisations, but in order to provide efficient paths
* for different architectures, alternative implementations of some
* critical sections has been done. You may want to experiment with these,
* to see which suits your architecture better.
*
* Selection of the different implementations is done with the following
* defines:
*
* HAS_AUTOINCREMENT
*
* Define this if your architecture supports preincrementation of
* pointers when referencing (applies to e.g. 68k)
*
* For those who are optimising amp, check out the Pentium rdtsc code
* (define PENTIUM_RDTSC). This code uses the rdtsc counter for showing
* how many cycles are spent in different parts of the code.
*/
#include <math.h>
#include "audio.h"
#include "getdata.h"
#include "misc2.h"
#define TRANSFORM
#include "transform.h"
#define PI12 0.261799387f
#define PI36 0.087266462f
void imdct_init()
{
int i;
for(i=0;i<36;i++) /* 0 */
win[0][i] = (float) sin(PI36 *(i+0.5));
for(i=0;i<18;i++) /* 1 */
win[1][i] = (float) sin(PI36 *(i+0.5));
for(i=18;i<24;i++)
win[1][i] = 1.0f;
for(i=24;i<30;i++)
win[1][i] = (float) sin(PI12 *(i+0.5-18));
for(i=30;i<36;i++)
win[1][i] = 0.0f;
for(i=0;i<6;i++) /* 3 */
win[3][i] = 0.0f;
for(i=6;i<12;i++)
win[3][i] = (float) sin(PI12 * (i+ 0.5 - 6.0));
for(i=12;i<18;i++)
win[3][i] = 1.0f;
for(i=18;i<36;i++)
win[3][i] = (float) sin(PI36 * (i + 0.5));
}
/* This uses Byeong Gi Lee's Fast Cosine Transform algorithm to decompose
the 36 point and 12 point IDCT's into 9 point and 3 point IDCT's,
respectively. Then the 9 point IDCT is computed by a modified version of
Mikko Tommila's IDCT algorithm, based on the WFTA. See his comments
before the first 9 point IDCT. The 3 point IDCT is already efficient to
implement. -- Jeff Tsay. */
/* I got the unrolled IDCT from Jeff Tsay; the code is presumably by
Francois-Raymond Boyer - I unrolled it a little further. tu */
void imdct(int win_type,int sb,int ch)
{
/*------------------------------------------------------------------*/
/* */
/* Function: Calculation of the inverse MDCT */
/* In the case of short blocks the 3 output vectors are already */
/* overlapped and added in this modul. */
/* */
/* New layer3 */
/* */
/*------------------------------------------------------------------*/
float tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8, tmp9, tmp10, tmp11;
register float save;
float pp1, pp2;
float *win_bt;
int i, p, ss;
float *in = xr[ch][sb];
float *s_p = s[ch][sb];
float *res_p = res[sb];
float out[36];
if(win_type == 2){
for(p=0;p<36;p+=9) {
out[p] = out[p+1] = out[p+2] = out[p+3] =
out[p+4] = out[p+5] = out[p+6] = out[p+7] =
out[p+8] = 0.0f;
}
for(ss=0;ss<18;ss+=6) {
/*
* 12 point IMDCT
*/
/* Begin 12 point IDCT */
/* Input aliasing for 12 pt IDCT */
in[5+ss]+=in[4+ss];in[4+ss]+=in[3+ss];in[3+ss]+=in[2+ss];
in[2+ss]+=in[1+ss];in[1+ss]+=in[0+ss];
/* Input aliasing on odd indices (for 6 point IDCT) */
in[5+ss] += in[3+ss]; in[3+ss] += in[1+ss];
/* 3 point IDCT on even indices */
pp2 = in[4+ss] * 0.500000000f;
pp1 = in[2+ss] * 0.866025403f;
save = in[0+ss] + pp2;
tmp1 = in[0+ss] - in[4+ss];
tmp0 = save + pp1;
tmp2 = save - pp1;
/* End 3 point IDCT on even indices */
/* 3 point IDCT on odd indices (for 6 point IDCT) */
pp2 = in[5+ss] * 0.500000000f;
pp1 = in[3+ss] * 0.866025403f;
save = in[1+ss] + pp2;
tmp4 = in[1+ss] - in[5+ss];
tmp5 = save + pp1;
tmp3 = save - pp1;
/* End 3 point IDCT on odd indices */
/* Twiddle factors on odd indices (for 6 point IDCT) */
tmp3 *= 1.931851653f;
tmp4 *= 0.707106781f;
tmp5 *= 0.517638090f;
/* Output butterflies on 2 3 point IDCT's (for 6 point IDCT) */
save = tmp0;
tmp0 += tmp5;
tmp5 = save - tmp5;
save = tmp1;
tmp1 += tmp4;
tmp4 = save - tmp4;
save = tmp2;
tmp2 += tmp3;
tmp3 = save - tmp3;
/* End 6 point IDCT */
/* Twiddle factors on indices (for 12 point IDCT) */
tmp0 *= 0.504314480f;
tmp1 *= 0.541196100f;
tmp2 *= 0.630236207f;
tmp3 *= 0.821339815f;
tmp4 *= 1.306562965f;
tmp5 *= 3.830648788f;
/* End 12 point IDCT */
/* Shift to 12 point modified IDCT, multiply by window type 2 */
tmp8 = tmp0 * -0.793353340f;
tmp9 = tmp0 * -0.608761429f;
tmp7 = tmp1 * -0.923879532f;
tmp10 = tmp1 * -0.382683432f;
tmp6 = tmp2 * -0.991444861f;
tmp11 = tmp2 * -0.130526192f;
tmp0 = tmp3;
tmp1 = tmp4 * 0.382683432f;
tmp2 = tmp5 * 0.608761429f;
tmp3 = tmp5 * -0.793353340f;
tmp4 = tmp4 * -0.923879532f;
tmp5 = tmp0 * -0.991444861f;
tmp0 *= 0.130526192f;
out[ss + 6] += tmp0;
out[ss + 7] += tmp1;
out[ss + 8] += tmp2;
out[ss + 9] += tmp3;
out[ss + 10] += tmp4;
out[ss + 11] += tmp5;
out[ss + 12] += tmp6;
out[ss + 13] += tmp7;
out[ss + 14] += tmp8;
out[ss + 15] += tmp9;
out[ss + 16] += tmp10;
out[ss + 17] += tmp11;
}
if (sb&1) {
for (i=0;i<18;i+=2) res_p[i]=out[i] + s_p[i];
for (i=1;i<18;i+=2) res_p[i]=-out[i] - s_p[i];
} else
for (i=0;i<18;i++) res_p[i]=out[i] + s_p[i];
for (i=18;i<36;i++) s_p[i-18]=out[i];
} else {
/*
* 36 point IDCT ****************************************************************
*/
float tmp[18];
/* input aliasing for 36 point IDCT */
in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14]; in[14]+=in[13];
in[13]+=in[12]; in[12]+=in[11]; in[11]+=in[10]; in[10]+=in[9];
in[9] +=in[8]; in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5];
in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2]; in[2] +=in[1];
in[1] +=in[0];
/* 18 point IDCT for odd indices */
/* input aliasing for 18 point IDCT */
in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9];
in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1];
{
float tmp0,tmp1,tmp2,tmp3,tmp4,tmp0_,tmp1_,tmp2_,tmp3_;
float tmp0o,tmp1o,tmp2o,tmp3o,tmp4o,tmp0_o,tmp1_o,tmp2_o,tmp3_o;
/* Fast 9 Point Inverse Discrete Cosine Transform
//
// By Francois-Raymond Boyer
// mailto:boyerf@iro.umontreal.ca
// http://www.iro.umontreal.ca/~boyerf
//
// The code has been optimized for Intel processors
// (takes a lot of time to convert float to and from iternal FPU representation)
//
// It is a simple "factorization" of the IDCT matrix.
*/
/* 9 point IDCT on even indices */
{
/* 5 points on odd indices (not realy an IDCT) */
float i0 = in[0]+in[0];
float i0p12 = i0 + in[12];
tmp0 = i0p12 + in[4]*1.8793852415718f + in[8]*1.532088886238f + in[16]*0.34729635533386f;
tmp1 = i0 + in[4] - in[8] - in[12] - in[12] - in[16];
tmp2 = i0p12 - in[4]*0.34729635533386f - in[8]*1.8793852415718f + in[16]*1.532088886238f;
tmp3 = i0p12 - in[4]*1.532088886238f + in[8]*0.34729635533386f - in[16]*1.8793852415718f;
tmp4 = in[0] - in[4] + in[8] - in[12] + in[16];
}
{
float i6_ = in[6]*1.732050808f;
tmp0_ = in[2]*1.9696155060244f + i6_ + in[10]*1.2855752193731f + in[14]*0.68404028665134f;
tmp1_ = (in[2] - in[10] - in[14])*1.732050808f;
tmp2_ = in[2]*1.2855752193731f - i6_ - in[10]*0.68404028665134f + in[14]*1.9696155060244f;
tmp3_ = in[2]*0.68404028665134f - i6_ + in[10]*1.9696155060244f - in[14]*1.2855752193731f;
}
/* 9 point IDCT on odd indices */
{
/* 5 points on odd indices (not realy an IDCT) */
float i0 = in[0+1]+in[0+1];
float i0p12 = i0 + in[12+1];
tmp0o = i0p12 + in[4+1]*1.8793852415718f + in[8+1]*1.532088886238f + in[16+1]*0.34729635533386f;
tmp1o = i0 + in[4+1] - in[8+1] - in[12+1] - in[12+1] - in[16+1];
tmp2o = i0p12 - in[4+1]*0.34729635533386f - in[8+1]*1.8793852415718f + in[16+1]*1.532088886238f;
tmp3o = i0p12 - in[4+1]*1.532088886238f + in[8+1]*0.34729635533386f - in[16+1]*1.8793852415718f;
tmp4o = (in[0+1] - in[4+1] + in[8+1] - in[12+1] + in[16+1])*0.707106781f; /* Twiddled */
}
{
/* 4 points on even indices */
float i6_ = in[6+1]*1.732050808f; /* Sqrt[3] */
tmp0_o = in[2+1]*1.9696155060244f + i6_ + in[10+1]*1.2855752193731f + in[14+1]*0.68404028665134f;
tmp1_o = (in[2+1] - in[10+1] - in[14+1])*1.732050808f;
tmp2_o = in[2+1]*1.2855752193731f - i6_ - in[10+1]*0.68404028665134f + in[14+1]*1.9696155060244f;
tmp3_o = in[2+1]*0.68404028665134f - i6_ + in[10+1]*1.9696155060244f - in[14+1]*1.2855752193731f;
}
/* Twiddle factors on odd indices
// and
// Butterflies on 9 point IDCT's
// and
// twiddle factors for 36 point IDCT
*/
{
float e, o;
e = tmp0 + tmp0_; o = (tmp0o + tmp0_o)*0.501909918f; tmp[0] = (e + o)*(-0.500476342f*.5f); tmp[17] = (e - o)*(-11.46279281f*.5f);
e = tmp1 + tmp1_; o = (tmp1o + tmp1_o)*0.517638090f; tmp[1] = (e + o)*(-0.504314480f*.5f); tmp[16] = (e - o)*(-3.830648788f*.5f);
e = tmp2 + tmp2_; o = (tmp2o + tmp2_o)*0.551688959f; tmp[2] = (e + o)*(-0.512139757f*.5f); tmp[15] = (e - o)*(-2.310113158f*.5f);
e = tmp3 + tmp3_; o = (tmp3o + tmp3_o)*0.610387294f; tmp[3] = (e + o)*(-0.524264562f*.5f); tmp[14] = (e - o)*(-1.662754762f*.5f);
tmp[4] = (tmp4 + tmp4o)*(-0.541196100f); tmp[13] = (tmp4 - tmp4o)*(-1.306562965f);
e = tmp3 - tmp3_; o = (tmp3o - tmp3_o)*0.871723397f; tmp[5] = (e + o)*(-0.563690973f*.5f); tmp[12] = (e - o)*(-1.082840285f*.5f);
e = tmp2 - tmp2_; o = (tmp2o - tmp2_o)*1.183100792f; tmp[6] = (e + o)*(-0.592844523f*.5f); tmp[11] = (e - o)*(-0.930579498f*.5f);
e = tmp1 - tmp1_; o = (tmp1o - tmp1_o)*1.931851653f; tmp[7] = (e + o)*(-0.630236207f*.5f); tmp[10] = (e - o)*(-0.821339815f*.5f);
e = tmp0 - tmp0_; o = (tmp0o - tmp0_o)*5.736856623f; tmp[8] = (e + o)*(-0.678170852f*.5f); tmp[9] = (e - o)*(-0.740093616f*.5f);
}
}
/* shift to modified IDCT */
win_bt = win[win_type];
if (sb&1) {
res_p[0] = -tmp[9] * win_bt[0] + s_p[0];
res_p[1] =-(-tmp[10] * win_bt[1] + s_p[1]);
res_p[2] = -tmp[11] * win_bt[2] + s_p[2];
res_p[3] =-(-tmp[12] * win_bt[3] + s_p[3]);
res_p[4] = -tmp[13] * win_bt[4] + s_p[4];
res_p[5] =-(-tmp[14] * win_bt[5] + s_p[5]);
res_p[6] = -tmp[15] * win_bt[6] + s_p[6];
res_p[7] =-(-tmp[16] * win_bt[7] + s_p[7]);
res_p[8] = -tmp[17] * win_bt[8] + s_p[8];
res_p[9] = -(tmp[17] * win_bt[9] + s_p[9]);
res_p[10]= tmp[16] * win_bt[10] + s_p[10];
res_p[11]=-(tmp[15] * win_bt[11] + s_p[11]);
res_p[12]= tmp[14] * win_bt[12] + s_p[12];
res_p[13]=-(tmp[13] * win_bt[13] + s_p[13]);
res_p[14]= tmp[12] * win_bt[14] + s_p[14];
res_p[15]=-(tmp[11] * win_bt[15] + s_p[15]);
res_p[16]= tmp[10] * win_bt[16] + s_p[16];
res_p[17]=-(tmp[9] * win_bt[17] + s_p[17]);
} else {
res_p[0] = -tmp[9] * win_bt[0] + s_p[0];
res_p[1] = -tmp[10] * win_bt[1] + s_p[1];
res_p[2] = -tmp[11] * win_bt[2] + s_p[2];
res_p[3] = -tmp[12] * win_bt[3] + s_p[3];
res_p[4] = -tmp[13] * win_bt[4] + s_p[4];
res_p[5] = -tmp[14] * win_bt[5] + s_p[5];
res_p[6] = -tmp[15] * win_bt[6] + s_p[6];
res_p[7] = -tmp[16] * win_bt[7] + s_p[7];
res_p[8] = -tmp[17] * win_bt[8] + s_p[8];
res_p[9] = tmp[17] * win_bt[9] + s_p[9];
res_p[10]= tmp[16] * win_bt[10] + s_p[10];
res_p[11]= tmp[15] * win_bt[11] + s_p[11];
res_p[12]= tmp[14] * win_bt[12] + s_p[12];
res_p[13]= tmp[13] * win_bt[13] + s_p[13];
res_p[14]= tmp[12] * win_bt[14] + s_p[14];
res_p[15]= tmp[11] * win_bt[15] + s_p[15];
res_p[16]= tmp[10] * win_bt[16] + s_p[16];
res_p[17]= tmp[9] * win_bt[17] + s_p[17];
}
s_p[0]= tmp[8] * win_bt[18];
s_p[1]= tmp[7] * win_bt[19];
s_p[2]= tmp[6] * win_bt[20];
s_p[3]= tmp[5] * win_bt[21];
s_p[4]= tmp[4] * win_bt[22];
s_p[5]= tmp[3] * win_bt[23];
s_p[6]= tmp[2] * win_bt[24];
s_p[7]= tmp[1] * win_bt[25];
s_p[8]= tmp[0] * win_bt[26];
s_p[9]= tmp[0] * win_bt[27];
s_p[10]= tmp[1] * win_bt[28];
s_p[11]= tmp[2] * win_bt[29];
s_p[12]= tmp[3] * win_bt[30];
s_p[13]= tmp[4] * win_bt[31];
s_p[14]= tmp[5] * win_bt[32];
s_p[15]= tmp[6] * win_bt[33];
s_p[16]= tmp[7] * win_bt[34];
s_p[17]= tmp[8] * win_bt[35];
}
}
/* fast DCT according to Lee[84]
* reordering according to Konstantinides[94]
*/
void poly(const int ch,int f)
{
static float u[2][2][17][16]; /* no v[][], it's redundant */
static int u_start[2]={0,0}; /* first element of u[][] */
static int u_div[2]={0,0}; /* which part of u[][] is currently used */
int start = u_start[ch];
int div = u_div[ch];
float (*u_p)[16];
#if defined(PENTIUM_RDTSC)
unsigned int cnt4, cnt3, cnt2, cnt1;
static int min_cycles = 99999999;
__asm__(".byte 0x0f,0x31" : "=a" (cnt1), "=d" (cnt4));
#endif
{
float d16,d17,d18,d19,d20,d21,d22,d23,d24,d25,d26,d27,d28,d29,d30,d31;
float d0,d1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13,d14,d15;
/* step 1: initial reordering and 1st (16 wide) butterflies
*/
d0 = res[ 0][f]; d16=(d0 - res[31][f]) * b1; d0 += res[31][f];
d1 = res[ 1][f]; d17=(d1 - res[30][f]) * b3; d1 += res[30][f];
d3 = res[ 2][f]; d19=(d3 - res[29][f]) * b5; d3 += res[29][f];
d2 = res[ 3][f]; d18=(d2 - res[28][f]) * b7; d2 += res[28][f];
d6 = res[ 4][f]; d22=(d6 - res[27][f]) * b9; d6 += res[27][f];
d7 = res[ 5][f]; d23=(d7 - res[26][f]) * b11; d7 += res[26][f];
d5 = res[ 6][f]; d21=(d5 - res[25][f]) * b13; d5 += res[25][f];
d4 = res[ 7][f]; d20=(d4 - res[24][f]) * b15; d4 += res[24][f];
d12= res[ 8][f]; d28=(d12 - res[23][f]) * b17; d12+= res[23][f];
d13= res[ 9][f]; d29=(d13 - res[22][f]) * b19; d13+= res[22][f];
d15= res[10][f]; d31=(d15 - res[21][f]) * b21; d15+= res[21][f];
d14= res[11][f]; d30=(d14 - res[20][f]) * b23; d14+= res[20][f];
d10= res[12][f]; d26=(d10 - res[19][f]) * b25; d10+= res[19][f];
d11= res[13][f]; d27=(d11 - res[18][f]) * b27; d11+= res[18][f];
d9 = res[14][f]; d25=(d9 - res[17][f]) * b29; d9 += res[17][f];
d8 = res[15][f]; d24=(d8 - res[16][f]) * b31; d8 += res[16][f];
{
float c0,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,c15;
/* a test to see what can be done with memory separation
* first we process indexes 0-15
*/
c0 = d0 + d8 ; c8 = ( d0 - d8 ) * b2;
c1 = d1 + d9 ; c9 = ( d1 - d9 ) * b6;
c2 = d2 + d10; c10= ( d2 - d10) * b14;
c3 = d3 + d11; c11= ( d3 - d11) * b10;
c4 = d4 + d12; c12= ( d4 - d12) * b30;
c5 = d5 + d13; c13= ( d5 - d13) * b26;
c6 = d6 + d14; c14= ( d6 - d14) * b18;
c7 = d7 + d15; c15= ( d7 - d15) * b22;
/* step 3: 4-wide butterflies
*/
d0 = c0 + c4 ; d4 = ( c0 - c4 ) * b4;
d1 = c1 + c5 ; d5 = ( c1 - c5 ) * b12;
d2 = c2 + c6 ; d6 = ( c2 - c6 ) * b28;
d3 = c3 + c7 ; d7 = ( c3 - c7 ) * b20;
d8 = c8 + c12; d12= ( c8 - c12) * b4;
d9 = c9 + c13; d13= ( c9 - c13) * b12;
d10= c10+ c14; d14= (c10 - c14) * b28;
d11= c11+ c15; d15= (c11 - c15) * b20;
/* step 4: 2-wide butterflies
*/
{
float rb8 = b8;
float rb24 = b24;
/**/ c0 = d0 + d2 ; c2 = ( d0 - d2 ) * rb8;
c1 = d1 + d3 ; c3 = ( d1 - d3 ) * rb24;
/**/ c4 = d4 + d6 ; c6 = ( d4 - d6 ) * rb8;
c5 = d5 + d7 ; c7 = ( d5 - d7 ) * rb24;
/**/ c8 = d8 + d10; c10= ( d8 - d10) * rb8;
c9 = d9 + d11; c11= ( d9 - d11) * rb24;
/**/ c12= d12+ d14; c14= (d12 - d14) * rb8;
c13= d13+ d15; c15= (d13 - d15) * rb24;
}
/* step 5: 1-wide butterflies
*/
{
float rb16 = b16;
/* this is a little 'hacked up'
*/
d0 = (-c0 -c1) * 2; d1 = ( c0 - c1 ) * rb16;
d2 = c2 + c3; d3 = ( c2 - c3 ) * rb16;
d3 -= d2;
d4 = c4 +c5; d5 = ( c4 - c5 ) * rb16;
d5 += d4;
d7 = -d5;
d7 += ( c6 - c7 ) * rb16; d6 = +c6 +c7;
d8 = c8 + c9 ; d9 = ( c8 - c9 ) * rb16;
d11= +d8 +d9;
d11 +=(c10 - c11) * rb16; d10= c10+ c11;
d12 = c12+ c13; d13 = (c12 - c13) * rb16;
d13 += -d8-d9+d12;
d14 = c14+ c15; d15 = (c14 - c15) * rb16;
d15-=d11;
d14 += -d8 -d10;
}
/* step 6: final resolving & reordering
* the other 32 are stored for use with the next granule
*/
u_p = (float (*)[16]) &u[ch][div][0][start];
/*16*/ u_p[ 0][0] =+d1 ;
u_p[ 2][0] = +d9 -d14;
/*20*/ u_p[ 4][0] = +d5 -d6;
u_p[ 6][0] = -d10 +d13;
/*24*/ u_p[ 8][0] =d3;
u_p[10][0] = -d8 -d9 +d11 -d13;
/*28*/ u_p[12][0] = +d7;
u_p[14][0] = +d15;
/* the other 32 are stored for use with the next granule
*/
u_p = (float (*)[16]) &u[ch][!div][0][start];
/*0*/ u_p[16][0] = d0;
u_p[14][0] = -(+d8 );
/*4*/ u_p[12][0] = -(+d4 );
u_p[10][0] = -(-d8 +d12 );
/*8*/ u_p[ 8][0] = -(+d2 );
u_p[ 6][0] = -(+d8 +d10 -d12 );
/*12*/ u_p[ 4][0] = -(-d4 +d6 );
u_p[ 2][0] = -d14;
u_p[ 0][0] = -d1;
}
{
float c0,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,c15;
/* memory separation, second part
*/
/* 2
*/
c0=d16 + d24; c8= (d16 - d24) * b2;
c1=d17 + d25; c9= (d17 - d25) * b6;
c2=d18 + d26; c10= (d18 - d26) * b14;
c3=d19 + d27; c11= (d19 - d27) * b10;
c4=d20 + d28; c12= (d20 - d28) * b30;
c5=d21 + d29; c13= (d21 - d29) * b26;
c6=d22 + d30; c14= (d22 - d30) * b18;
c7=d23 + d31; c15= (d23 - d31) * b22;
/* 3
*/
d16= c0+ c4; d20= (c0 - c4) * b4;
d17= c1+ c5; d21= (c1 - c5) * b12;
d18= c2+ c6; d22= (c2 - c6) * b28;
d19= c3+ c7; d23= (c3 - c7) * b20;
d24= c8+ c12; d28= (c8 - c12) * b4;
d25= c9+ c13; d29= (c9 - c13) * b12;
d26= c10+ c14; d30= (c10 - c14) * b28;
d27= c11+ c15; d31= (c11 - c15) * b20;
/* 4
*/
{
float rb8 = b8;
float rb24 = b24;
/**/ c0= d16+ d18; c2= (d16 - d18) * rb8;
c1= d17+ d19; c3= (d17 - d19) * rb24;
/**/ c4= d20+ d22; c6= (d20 - d22) * rb8;
c5= d21+ d23; c7= (d21 - d23) * rb24;
/**/ c8= d24+ d26; c10= (d24 - d26) * rb8;
c9= d25+ d27; c11= (d25 - d27) * rb24;
/**/ c12= d28+ d30; c14= (d28 - d30) * rb8;
c13= d29+ d31; c15= (d29 - d31) * rb24;
}
/* 5
*/
{
float rb16 = b16;
d16= c0+ c1; d17= (c0 - c1) * rb16;
d18= c2+ c3; d19= (c2 - c3) * rb16;
d20= c4+ c5; d21= (c4 - c5) * rb16;
d20+=d16; d21+=d17;
d22= c6+ c7; d23= (c6 - c7) * rb16;
d22+=d16; d22+=d18;
d23+=d16; d23+=d17; d23+=d19;
d24= c8+ c9; d25= (c8 - c9) * rb16;
d26= c10+ c11; d27= (c10 - c11) * rb16;
d26+=d24;
d27+=d24; d27+=d25;
d28= c12+ c13; d29= (c12 - c13) * rb16;
d28-=d20; d29+=d28; d29-=d21;
d30= c14+ c15; d31= (c14 - c15) * rb16;
d30-=d22;
d31-=d23;
}
/* step 6: final resolving & reordering
* the other 32 are stored for use with the next granule
*/
u_p = (float (*)[16]) &u[ch][!div][0][start];
u_p[ 1][0] = -(+d30 );
u_p[ 3][0] = -(+d22 -d26 );
u_p[ 5][0] = -(-d18 -d20 +d26 );
u_p[ 7][0] = -(+d18 -d28 );
u_p[ 9][0] = -(+d28 );
u_p[11][0] = -(+d20 -d24 );
u_p[13][0] = -(-d16 +d24 );
u_p[15][0] = -(+d16 );
/* the other 32 are stored for use with the next granule
*/
u_p = (float (*)[16]) &u[ch][div][0][start];
u_p[15][0] = +d31;
u_p[13][0] = +d23 -d27;
u_p[11][0] = -d19 -d20 -d21 +d27;
u_p[ 9][0] = +d19 -d29;
u_p[ 7][0] = -d18 +d29;
u_p[ 5][0] = +d18 +d20 +d21 -d25 -d26;
u_p[ 3][0] = -d17 -d22 +d25 +d26;
u_p[ 1][0] = +d17 -d30;
}
}
#if defined(PENTIUM_RDTSC)
__asm__(".byte 0x0f,0x31" : "=a" (cnt3), "=d" (cnt4));
#endif
/* we're doing dewindowing and calculating final samples now
*/
#if defined(ARCH_i586)
/* x86 assembler optimisations. These optimisations are tuned
specifically for Intel Pentiums. */
asm("movl $15,%%eax\n\t"\
"1:\n\t"\
"flds (%0)\n\t"\
"fmuls (%1)\n\t"\
"flds 4(%0)\n\t"\
"fmuls 4(%1)\n\t"\
"flds 8(%0)\n\t"\
"fmuls 8(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 12(%0)\n\t"\
"fmuls 12(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 16(%0)\n\t"\
"fmuls 16(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 20(%0)\n\t"\
"fmuls 20(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 24(%0)\n\t"\
"fmuls 24(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 28(%0)\n\t"\
"fmuls 28(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 32(%0)\n\t"\
"fmuls 32(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 36(%0)\n\t"\
"fmuls 36(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 40(%0)\n\t"\
"fmuls 40(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 44(%0)\n\t"\
"fmuls 44(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 48(%0)\n\t"\
"fmuls 48(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 52(%0)\n\t"\
"fmuls 52(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 56(%0)\n\t"\
"fmuls 56(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 60(%0)\n\t"\
"fmuls 60(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"addl $64,%0\n\t"\
"addl $128,%1\n\t"\
"subl $4,%%esp\n\t"\
"faddp\n\t"\
"fistpl (%%esp)\n\t"\
"popl %%ecx\n\t"\
"cmpl $32767,%%ecx\n\t"\
"jle 2f\n\t"\
"movw $32767,%%cx\n\t"\
"jmp 3f\n\t"\
"2: cmpl $-32768,%%ecx\n\t"\
"jge 3f\n\t"\
"movw $-32768,%%cx\n\t"\
"3: movw %%cx,(%2)\n\t"\
"addl %3,%2\n\t"\
"decl %%eax\n\t"\
"jns 1b\n\t"\
"testb $1,%4\n\t"\
"je 4f\n\t"
"flds (%0)\n\t"\
"fmuls (%1)\n\t"\
"flds 8(%0)\n\t"\
"fmuls 8(%1)\n\t"\
"flds 16(%0)\n\t"\
"fmuls 16(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 24(%0)\n\t"\
"fmuls 24(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 32(%0)\n\t"\
"fmuls 32(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 40(%0)\n\t"\
"fmuls 40(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 48(%0)\n\t"\
"fmuls 48(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 56(%0)\n\t"\
"fmuls 56(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"subl $4,%%esp\n\t"\
"subl $64,%0\n\t"\
"subl $192,%1\n\t"\
"faddp\n\t"\
"fistpl (%%esp)\n\t"\
"popl %%ecx\n\t"\
"cmpl $32767,%%ecx\n\t"\
"jle 2f\n\t"\
"movw $32767,%%cx\n\t"\
"jmp 3f\n\t"\
"2: cmpl $-32768,%%ecx\n\t"\
"jge 3f\n\t"\
"movw $-32768,%%cx\n\t"\
"3: movw %%cx,(%2)\n\t"\
"movl %5,%%ecx\n\t"\
"sall $3,%%ecx\n\t"\
"addl %%ecx,%1\n\t"\
"addl %3,%2\n\t"\
"movl $14,%%eax\n\t"\
"1:flds 4(%0)\n\t"\
"fmuls 56(%1)\n\t"\
"flds (%0)\n\t"\
"fmuls 60(%1)\n\t"\
"flds 12(%0)\n\t"\
"fmuls 48(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubp\n\t"\
"flds 8(%0)\n\t"\
"fmuls 52(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 20(%0)\n\t"\
"fmuls 40(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 16(%0)\n\t"\
"fmuls 44(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 28(%0)\n\t"\
"fmuls 32(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 24(%0)\n\t"\
"fmuls 36(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 36(%0)\n\t"\
"fmuls 24(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 32(%0)\n\t"\
"fmuls 28(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 44(%0)\n\t"\
"fmuls 16(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 40(%0)\n\t"\
"fmuls 20(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 52(%0)\n\t"\
"fmuls 8(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 48(%0)\n\t"\
"fmuls 12(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 60(%0)\n\t"\
"fmuls (%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 56(%0)\n\t"\
"fmuls 4(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"subl $64,%0\n\t"\
"subl $128,%1\n\t"\
"subl $4,%%esp\n\t"\
"fsubp\n\t"\
"fistpl (%%esp)\n\t"\
"popl %%ecx\n\t"\
"cmpl $32767,%%ecx\n\t"\
"jle 2f\n\t"\
"movw $32767,%%cx\n\t"\
"jmp 3f\n\t"\
"2: cmpl $-32768,%%ecx\n\t"\
"jge 3f\n\t"\
"movw $-32768,%%cx\n\t"\
"3: movw %%cx,(%2)\n\t"\
"addl %3,%2\n\t"\
"decl %%eax\n\t"\
"jns 1b\n\t"\
"jmp 5f\n\t"\
"4:flds 4(%0)\n\t"\
"fmuls 4(%1)\n\t"\
"flds 12(%0)\n\t"\
"fmuls 12(%1)\n\t"\
"flds 20(%0)\n\t"\
"fmuls 20(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 28(%0)\n\t"\
"fmuls 28(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 36(%0)\n\t"\
"fmuls 36(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 44(%0)\n\t"\
"fmuls 44(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 52(%0)\n\t"\
"fmuls 52(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 60(%0)\n\t"\
"fmuls 60(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"subl $4,%%esp\n\t"\
"subl $64,%0\n\t"\
"subl $192,%1\n\t"\
"faddp\n\t"\
"fistpl (%%esp)\n\t"\
"popl %%ecx\n\t"\
"cmpl $32767,%%ecx\n\t"\
"jle 2f\n\t"\
"movw $32767,%%cx\n\t"\
"jmp 3f\n\t"\
"2: cmpl $-32768,%%ecx\n\t"\
"jge 3f\n\t"\
"movw $-32768,%%cx\n\t"\
"3: movw %%cx,(%2)\n\t"\
"movl %5,%%ecx\n\t"\
"sall $3,%%ecx\n\t"\
"addl %%ecx,%1\n\t"\
"addl %3,%2\n\t"\
"movl $14,%%eax\n\t"\
"1:flds (%0)\n\t"\
"fmuls 60(%1)\n\t"\
"flds 4(%0)\n\t"\
"fmuls 56(%1)\n\t"\
"flds 8(%0)\n\t"\
"fmuls 52(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubp\n\t"\
"flds 12(%0)\n\t"\
"fmuls 48(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 16(%0)\n\t"\
"fmuls 44(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 20(%0)\n\t"\
"fmuls 40(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 24(%0)\n\t"\
"fmuls 36(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 28(%0)\n\t"\
"fmuls 32(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 32(%0)\n\t"\
"fmuls 28(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 36(%0)\n\t"\
"fmuls 24(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 40(%0)\n\t"\
"fmuls 20(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 44(%0)\n\t"\
"fmuls 16(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 48(%0)\n\t"\
"fmuls 12(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 52(%0)\n\t"\
"fmuls 8(%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"flds 56(%0)\n\t"\
"fmuls 4(%1)\n\t"\
"fxch %%st(2)\n\t"\
"fsubrp\n\t"\
"flds 60(%0)\n\t"\
"fmuls (%1)\n\t"\
"fxch %%st(2)\n\t"\
"faddp\n\t"\
"subl $64,%0\n\t"\
"subl $128,%1\n\t"\
"subl $4,%%esp\n\t"\
"fsubp\n\t"\
"fistpl (%%esp)\n\t"\
"popl %%ecx\n\t"\
"cmpl $32767,%%ecx\n\t"\
"jle 2f\n\t"\
"movw $32767,%%cx\n\t"\
"jmp 3f\n\t"\
"2: cmpl $-32768,%%ecx\n\t"\
"jge 3f\n\t"\
"movw $-32768,%%cx\n\t"\
"3: movw %%cx,(%2)\n\t"\
"addl %3,%2\n\t"\
"decl %%eax\n\t"\
"jns 1b\n\t"\
"5:"\
: : "b" (u[ch][div]), "d" (t_dewindow[0] + 16 - start), "S" (&sample_buffer[f>>(2-nch)][nch==2?0:(f&1?16:0)][ch]), "m" (sizeof(short) * nch), "m" (div), "m" (start)\
: "eax", "ecx", "memory");
#else
{
short *samples = (&sample_buffer[f>>(2-nch)][nch==2?0:(f&1?16:0)][ch]);
int out, j;
#define PUT_SAMPLE(out) \
if (out > 32767) \
*samples = 32767; \
else \
if (out < -32768) \
*samples = -32768; \
else \
*samples = out; \
\
samples += nch;
#if defined(SUPERHACK)
/* These is a simple implementation which should be nicer to the
cache; computation of samples are done in one pass rather than
two. However, for various reasons which I do not have time to
investigate, it runs quite a lot slower than two pass
computations. If you have time, you are welcome to look into
it. */
{
float (*u_ptr)[16] = u[ch][div];
const float *dewindow2 = t_dewindow[0] + start;
{
float outf1, outf2, outf3, outf4;
outf1 = u_ptr[0][ 0] * dewindow[0x0];
outf2 = u_ptr[0][ 1] * dewindow[0x1];
outf3 = u_ptr[0][ 2] * dewindow[0x2];
outf4 = u_ptr[0][ 3] * dewindow[0x3];
outf1 += u_ptr[0][ 4] * dewindow[0x4];
outf2 += u_ptr[0][ 5] * dewindow[0x5];
outf3 += u_ptr[0][ 6] * dewindow[0x6];
outf4 += u_ptr[0][ 7] * dewindow[0x7];
outf1 += u_ptr[0][ 8] * dewindow[0x8];
outf2 += u_ptr[0][ 9] * dewindow[0x9];
outf3 += u_ptr[0][10] * dewindow[0xa];
outf4 += u_ptr[0][11] * dewindow[0xb];
outf1 += u_ptr[0][12] * dewindow[0xc];
outf2 += u_ptr[0][13] * dewindow[0xd];
outf3 += u_ptr[0][14] * dewindow[0xe];
outf4 += u_ptr[0][15] * dewindow[0xf];
out = outf1 + outf2 + outf3 + outf4;
dewindow += 32;
dewindow2 += 32;
u_ptr++;
if (out > 32767)
samples[0] = 32767;
else
if (out < -32768)
samples[0] = -32768;
else
samples[0] = out;
}
if (div & 0x1) {
for (j = 1; j < 16; ++j) {
float outf1, outf2, outf3, outf4;
outf1 = u_ptr[0][ 0] * dewindow[0x0];
outf3 = u_ptr[0][ 0] * dewindow2[0xf];
outf2 = u_ptr[0][ 1] * dewindow[0x1];
outf4 = u_ptr[0][ 1] * dewindow2[0xe];
outf1 += u_ptr[0][ 2] * dewindow[0x2];
outf3 += u_ptr[0][ 2] * dewindow2[0xd];
outf2 += u_ptr[0][ 3] * dewindow[0x3];
outf4 += u_ptr[0][ 3] * dewindow2[0xc];
outf1 += u_ptr[0][ 4] * dewindow[0x4];
outf3 += u_ptr[0][ 4] * dewindow2[0xb];
outf2 += u_ptr[0][ 5] * dewindow[0x5];
outf4 += u_ptr[0][ 5] * dewindow2[0xa];
outf1 += u_ptr[0][ 6] * dewindow[0x6];
outf3 += u_ptr[0][ 6] * dewindow2[0x9];
outf2 += u_ptr[0][ 7] * dewindow[0x7];
outf4 += u_ptr[0][ 7] * dewindow2[0x8];
outf1 += u_ptr[0][ 8] * dewindow[0x8];
outf3 += u_ptr[0][ 8] * dewindow2[0x7];
outf2 += u_ptr[0][ 9] * dewindow[0x9];
outf4 += u_ptr[0][ 9] * dewindow2[0x6];
outf1 += u_ptr[0][10] * dewindow[0xa];
outf3 += u_ptr[0][10] * dewindow2[0x5];
outf2 += u_ptr[0][11] * dewindow[0xb];
outf4 += u_ptr[0][11] * dewindow2[0x4];
outf1 += u_ptr[0][12] * dewindow[0xc];
outf3 += u_ptr[0][12] * dewindow2[0x3];
outf2 += u_ptr[0][13] * dewindow[0xd];
outf4 += u_ptr[0][13] * dewindow2[0x2];
outf1 += u_ptr[0][14] * dewindow[0xe];
outf3 += u_ptr[0][14] * dewindow2[0x1];
outf2 += u_ptr[0][15] * dewindow[0xf];
outf4 += u_ptr[0][15] * dewindow2[0x0];
dewindow += 32;
dewindow2 += 32;
u_ptr++;
out = outf1 + outf2;
if (out > 32767)
samples[j * 2] = 32767;
else
if (out < -32768)
samples[j * 2] = -32768;
else
samples[j * 2] = out;
out = outf4 - outf3;
if (out > 32767)
samples[64 - (j * 2)] = 32767;
else
if (out < -32768)
samples[64 - (j * 2)] = -32768;
else
samples[64 - (j * 2)] = out;
}
{
float outf2, outf4;
outf2 = u_ptr[0][ 0] * dewindow[0x0];
outf4 = u_ptr[0][ 2] * dewindow[0x2];
outf2 += u_ptr[0][ 4] * dewindow[0x4];
outf4 += u_ptr[0][ 6] * dewindow[0x6];
outf2 += u_ptr[0][ 8] * dewindow[0x8];
outf4 += u_ptr[0][10] * dewindow[0xa];
outf2 += u_ptr[0][12] * dewindow[0xc];
outf4 += u_ptr[0][14] * dewindow[0xe];
out = outf2 + outf4;
if (out > 32767)
samples[16 * 2] = 32767;
else
if (out < -32768)
samples[16 * 2] = -32768;
else
samples[16 * 2] = out;
}
} else {
for (j = 1; j < 16; ++j) {
float outf1, outf2, outf3, outf4;
outf1 = u_ptr[0][ 0] * dewindow[0x0];
outf3 = u_ptr[0][ 0] * dewindow2[0xf];
outf2 = u_ptr[0][ 1] * dewindow[0x1];
outf4 = u_ptr[0][ 1] * dewindow2[0xe];
outf1 += u_ptr[0][ 2] * dewindow[0x2];
outf3 += u_ptr[0][ 2] * dewindow2[0xd];
outf2 += u_ptr[0][ 3] * dewindow[0x3];
outf4 += u_ptr[0][ 3] * dewindow2[0xc];
outf1 += u_ptr[0][ 4] * dewindow[0x4];
outf3 += u_ptr[0][ 4] * dewindow2[0xb];
outf2 += u_ptr[0][ 5] * dewindow[0x5];
outf4 += u_ptr[0][ 5] * dewindow2[0xa];
outf1 += u_ptr[0][ 6] * dewindow[0x6];
outf3 += u_ptr[0][ 6] * dewindow2[0x9];
outf2 += u_ptr[0][ 7] * dewindow[0x7];
outf4 += u_ptr[0][ 7] * dewindow2[0x8];
outf1 += u_ptr[0][ 8] * dewindow[0x8];
outf3 += u_ptr[0][ 8] * dewindow2[0x7];
outf2 += u_ptr[0][ 9] * dewindow[0x9];
outf4 += u_ptr[0][ 9] * dewindow2[0x6];
outf1 += u_ptr[0][10] * dewindow[0xa];
outf3 += u_ptr[0][10] * dewindow2[0x5];
outf2 += u_ptr[0][11] * dewindow[0xb];
outf4 += u_ptr[0][11] * dewindow2[0x4];
outf1 += u_ptr[0][12] * dewindow[0xc];
outf3 += u_ptr[0][12] * dewindow2[0x3];
outf2 += u_ptr[0][13] * dewindow[0xd];
outf4 += u_ptr[0][13] * dewindow2[0x2];
outf1 += u_ptr[0][14] * dewindow[0xe];
outf3 += u_ptr[0][14] * dewindow2[0x1];
outf2 += u_ptr[0][15] * dewindow[0xf];
outf4 += u_ptr[0][15] * dewindow2[0x0];
dewindow += 32;
dewindow2 += 32;
u_ptr++;
out = outf1 + outf2;
if (out > 32767)
samples[j * 2] = 32767;
else
if (out < -32768)
samples[j * 2] = -32768;
else
samples[j * 2] = out;
out = outf3 - outf4;
if (out > 32767)
samples[64 - (j * 2)] = 32767;
else
if (out < -32768)
samples[64 - (j * 2)] = -32768;
else
samples[64 - (j * 2)] = out;
}
{
float outf2, outf4;
outf2 = u_ptr[0][ 1] * dewindow[0x1];
outf4 = u_ptr[0][ 3] * dewindow[0x3];
outf2 += u_ptr[0][ 5] * dewindow[0x5];
outf4 += u_ptr[0][ 7] * dewindow[0x7];
outf2 += u_ptr[0][ 9] * dewindow[0x9];
outf4 += u_ptr[0][11] * dewindow[0xb];
outf2 += u_ptr[0][13] * dewindow[0xd];
outf4 += u_ptr[0][15] * dewindow[0xf];
out = outf2 + outf4;
if (out > 32767)
samples[16 * 2] = 32767;
else
if (out < -32768)
samples[16 * 2] = -32768;
else
samples[16 * 2] = out;
}
}
}
#elif defined(HAS_AUTOINCREMENT)
const float *dewindow = t_dewindow[0] + 15 - start;
/* This is tuned specifically for architectures with
autoincrement and -decrement. */
{
float *u_ptr = (float*) u[ch][div];
u_ptr--;
for (j = 0; j < 16; ++j) {
float outf1, outf2, outf3, outf4;
outf1 = *++u_ptr * *++dewindow;
outf2 = *++u_ptr * *++dewindow;
outf3 = *++u_ptr * *++dewindow;
outf4 = *++u_ptr * *++dewindow;
outf1 += *++u_ptr * *++dewindow;
outf2 += *++u_ptr * *++dewindow;
outf3 += *++u_ptr * *++dewindow;
outf4 += *++u_ptr * *++dewindow;
outf1 += *++u_ptr * *++dewindow;
outf2 += *++u_ptr * *++dewindow;
outf3 += *++u_ptr * *++dewindow;
outf4 += *++u_ptr * *++dewindow;
outf1 += *++u_ptr * *++dewindow;
outf2 += *++u_ptr * *++dewindow;
outf3 += *++u_ptr * *++dewindow;
outf4 += *++u_ptr * *++dewindow;
out = outf1 + outf2 + outf3 + outf4;
dewindow += 16;
PUT_SAMPLE(out)
}
if (div & 0x1) {
{
float outf2, outf4;
outf2 = u_ptr[ 1] * dewindow[0x1];
outf4 = u_ptr[ 3] * dewindow[0x3];
outf2 += u_ptr[ 5] * dewindow[0x5];
outf4 += u_ptr[ 7] * dewindow[0x7];
outf2 += u_ptr[ 9] * dewindow[0x9];
outf4 += u_ptr[11] * dewindow[0xb];
outf2 += u_ptr[13] * dewindow[0xd];
outf4 += u_ptr[15] * dewindow[0xf];
out = outf2 + outf4;
PUT_SAMPLE(out)
}
dewindow -= 31;
dewindow += start;
dewindow += start;
u_ptr -= 16;
for (; j < 31; ++j) {
float outf1, outf2, outf3, outf4;
outf1 = *++u_ptr * *--dewindow;
outf2 = *++u_ptr * *--dewindow;
outf3 = *++u_ptr * *--dewindow;
outf4 = *++u_ptr * *--dewindow;
outf1 += *++u_ptr * *--dewindow;
outf2 += *++u_ptr * *--dewindow;
outf3 += *++u_ptr * *--dewindow;
outf4 += *++u_ptr * *--dewindow;
outf1 += *++u_ptr * *--dewindow;
outf2 += *++u_ptr * *--dewindow;
outf3 += *++u_ptr * *--dewindow;
outf4 += *++u_ptr * *--dewindow;
outf1 += *++u_ptr * *--dewindow;
outf2 += *++u_ptr * *--dewindow;
outf3 += *++u_ptr * *--dewindow;
outf4 += *++u_ptr * *--dewindow;
out = outf2 - outf1 + outf4 - outf3;
dewindow -= 16;
u_ptr -= 32;
PUT_SAMPLE(out)
}
} else {
{
float outf2, outf4;
outf2 = u_ptr[ 2] * dewindow[ 0x2];
outf4 = u_ptr[ 4] * dewindow[ 0x4];
outf2 += u_ptr[ 6] * dewindow[ 0x6];
outf4 += u_ptr[ 8] * dewindow[ 0x8];
outf2 += u_ptr[10] * dewindow[ 0xa];
outf4 += u_ptr[12] * dewindow[ 0xc];
outf2 += u_ptr[14] * dewindow[ 0xe];
outf4 += u_ptr[16] * dewindow[0x10];
out = outf2 + outf4;
PUT_SAMPLE(out)
}
dewindow -= 31;
dewindow += start;
dewindow += start;
u_ptr -= 16;
for (; j < 31; ++j) {
float outf1, outf2, outf3, outf4;
outf1 = *++u_ptr * *--dewindow;
outf2 = *++u_ptr * *--dewindow;
outf3 = *++u_ptr * *--dewindow;
outf4 = *++u_ptr * *--dewindow;
outf1 += *++u_ptr * *--dewindow;
outf2 += *++u_ptr * *--dewindow;
outf3 += *++u_ptr * *--dewindow;
outf4 += *++u_ptr * *--dewindow;
outf1 += *++u_ptr * *--dewindow;
outf2 += *++u_ptr * *--dewindow;
outf3 += *++u_ptr * *--dewindow;
outf4 += *++u_ptr * *--dewindow;
outf1 += *++u_ptr * *--dewindow;
outf2 += *++u_ptr * *--dewindow;
outf3 += *++u_ptr * *--dewindow;
outf4 += *++u_ptr * *--dewindow;
out = outf1 - outf2 + outf3 - outf4;
dewindow -= 16;
u_ptr -= 32;
PUT_SAMPLE(out)
}
}
}
#else
const float *dewindow = t_dewindow[0] + 16 - start;
/* These optimisations are tuned specifically for architectures
without autoincrement and -decrement. */
{
float (*u_ptr)[16] = u[ch][div];
for (j = 0; j < 16; ++j) {
float outf1, outf2, outf3, outf4;
outf1 = u_ptr[0][ 0] * dewindow[0x0];
outf2 = u_ptr[0][ 1] * dewindow[0x1];
outf3 = u_ptr[0][ 2] * dewindow[0x2];
outf4 = u_ptr[0][ 3] * dewindow[0x3];
outf1 += u_ptr[0][ 4] * dewindow[0x4];
outf2 += u_ptr[0][ 5] * dewindow[0x5];
outf3 += u_ptr[0][ 6] * dewindow[0x6];
outf4 += u_ptr[0][ 7] * dewindow[0x7];
outf1 += u_ptr[0][ 8] * dewindow[0x8];
outf2 += u_ptr[0][ 9] * dewindow[0x9];
outf3 += u_ptr[0][10] * dewindow[0xa];
outf4 += u_ptr[0][11] * dewindow[0xb];
outf1 += u_ptr[0][12] * dewindow[0xc];
outf2 += u_ptr[0][13] * dewindow[0xd];
outf3 += u_ptr[0][14] * dewindow[0xe];
outf4 += u_ptr[0][15] * dewindow[0xf];
out = (int) (outf1 + outf2 + outf3 + outf4);
dewindow += 32;
u_ptr++;
PUT_SAMPLE(out)
}
if (div & 0x1) {
{
float outf2, outf4;
outf2 = u_ptr[0][ 0] * dewindow[0x0];
outf4 = u_ptr[0][ 2] * dewindow[0x2];
outf2 += u_ptr[0][ 4] * dewindow[0x4];
outf4 += u_ptr[0][ 6] * dewindow[0x6];
outf2 += u_ptr[0][ 8] * dewindow[0x8];
outf4 += u_ptr[0][10] * dewindow[0xa];
outf2 += u_ptr[0][12] * dewindow[0xc];
outf4 += u_ptr[0][14] * dewindow[0xe];
out = (int) (outf2 + outf4);
PUT_SAMPLE(out)
}
dewindow -= 48;
dewindow += start;
dewindow += start;
for (; j < 31; ++j) {
float outf1, outf2, outf3, outf4;
--u_ptr;
outf1 = u_ptr[0][ 0] * dewindow[0xf];
outf2 = u_ptr[0][ 1] * dewindow[0xe];
outf3 = u_ptr[0][ 2] * dewindow[0xd];
outf4 = u_ptr[0][ 3] * dewindow[0xc];
outf1 += u_ptr[0][ 4] * dewindow[0xb];
outf2 += u_ptr[0][ 5] * dewindow[0xa];
outf3 += u_ptr[0][ 6] * dewindow[0x9];
outf4 += u_ptr[0][ 7] * dewindow[0x8];
outf1 += u_ptr[0][ 8] * dewindow[0x7];
outf2 += u_ptr[0][ 9] * dewindow[0x6];
outf3 += u_ptr[0][10] * dewindow[0x5];
outf4 += u_ptr[0][11] * dewindow[0x4];
outf1 += u_ptr[0][12] * dewindow[0x3];
outf2 += u_ptr[0][13] * dewindow[0x2];
outf3 += u_ptr[0][14] * dewindow[0x1];
outf4 += u_ptr[0][15] * dewindow[0x0];
out = (int) (-outf1 + outf2 - outf3 + outf4);
dewindow -= 32;
PUT_SAMPLE(out)
}
} else {
{
float outf2, outf4;
outf2 = u_ptr[0][ 1] * dewindow[0x1];
outf4 = u_ptr[0][ 3] * dewindow[0x3];
outf2 += u_ptr[0][ 5] * dewindow[0x5];
outf4 += u_ptr[0][ 7] * dewindow[0x7];
outf2 += u_ptr[0][ 9] * dewindow[0x9];
outf4 += u_ptr[0][11] * dewindow[0xb];
outf2 += u_ptr[0][13] * dewindow[0xd];
outf4 += u_ptr[0][15] * dewindow[0xf];
out = (int) (outf2 + outf4);
PUT_SAMPLE(out)
}
dewindow -= 48;
dewindow += start;
dewindow += start;
for (; j < 31; ++j) {
float outf1, outf2, outf3, outf4;
--u_ptr;
outf1 = u_ptr[0][ 0] * dewindow[0xf];
outf2 = u_ptr[0][ 1] * dewindow[0xe];
outf3 = u_ptr[0][ 2] * dewindow[0xd];
outf4 = u_ptr[0][ 3] * dewindow[0xc];
outf1 += u_ptr[0][ 4] * dewindow[0xb];
outf2 += u_ptr[0][ 5] * dewindow[0xa];
outf3 += u_ptr[0][ 6] * dewindow[0x9];
outf4 += u_ptr[0][ 7] * dewindow[0x8];
outf1 += u_ptr[0][ 8] * dewindow[0x7];
outf2 += u_ptr[0][ 9] * dewindow[0x6];
outf3 += u_ptr[0][10] * dewindow[0x5];
outf4 += u_ptr[0][11] * dewindow[0x4];
outf1 += u_ptr[0][12] * dewindow[0x3];
outf2 += u_ptr[0][13] * dewindow[0x2];
outf3 += u_ptr[0][14] * dewindow[0x1];
outf4 += u_ptr[0][15] * dewindow[0x0];
out = (int) (outf1 - outf2 + outf3 - outf4);
dewindow -= 32;
PUT_SAMPLE(out)
}
}
}
#endif
}
#endif
--u_start[ch];
u_start[ch] &= 0xf;
u_div[ch]=u_div[ch] ? 0 : 1;
#if defined(PENTIUM_RDTSC)
__asm__(".byte 0x0f,0x31" : "=a" (cnt2), "=d" (cnt4));
if (cnt2-cnt1 < min_cycles) {
min_cycles = cnt2-cnt1;
printf("%d, %d cycles, %d\n", cnt3-cnt1, min_cycles, start);
}
#endif
}
void premultiply()
{
int i,t;
for (i = 0; i < 17; ++i)
for (t = 0; t < 32; ++t)
t_dewindow[i][t] *= 16383.5f;
}
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