mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-22 14:52:39 +03:00
270 lines
6.0 KiB
C
270 lines
6.0 KiB
C
/*
|
|
decode_i386.c: decode for i386 (really faster?)
|
|
|
|
copyright 1995-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
|
|
see COPYING and AUTHORS files in distribution or http://mpg123.de
|
|
initially written by Michael Hipp
|
|
|
|
slighlty optimized for machines without autoincrement/decrement.
|
|
The performance is highly compiler dependend. Maybe
|
|
the decode.c version for 'normal' processor may be faster
|
|
even for Intel processors.
|
|
*/
|
|
|
|
//#include <stdlib.h>
|
|
#include <math.h>
|
|
//#include <string.h>
|
|
|
|
//#include "config.h"
|
|
#include "mpg123.h"
|
|
|
|
#if 0
|
|
/* old WRITE_SAMPLE */
|
|
#define WRITE_SAMPLE(samples,sum,clip) \
|
|
if( (sum) > 32767.0) { *(samples) = 0x7fff; (clip)++; } \
|
|
else if( (sum) < -32768.0) { *(samples) = -0x8000; (clip)++; } \
|
|
else { *(samples) = sum; }
|
|
#else
|
|
/* new WRITE_SAMPLE */
|
|
/* keep in mind that we are on known little-endian i386 here and special tricks are allowed... */
|
|
#define WRITE_SAMPLE(samples,sum,clip) { \
|
|
double dtemp; int v; /* sizeof(int) == 4 */ \
|
|
dtemp = ((((65536.0 * 65536.0 * 16)+(65536.0 * 0.5))* 65536.0)) + (sum); \
|
|
v = ((*(int *)&dtemp) - 0x80000000); \
|
|
if( v > 32767) { *(samples) = 0x7fff; (clip)++; } \
|
|
else if( v < -32768) { *(samples) = -0x8000; (clip)++; } \
|
|
else { *(samples) = v; } \
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
int synth_1to1_8bit(real *bandPtr,int channel,unsigned char *samples,int *pnt)
|
|
{
|
|
short samples_tmp[64];
|
|
short *tmp1 = samples_tmp + channel;
|
|
int i,ret;
|
|
int pnt1 = 0;
|
|
|
|
ret = synth_1to1(bandPtr,channel,(unsigned char *)samples_tmp,&pnt1);
|
|
samples += channel + *pnt;
|
|
|
|
for(i=0;i<32;i++) {
|
|
*samples = conv16to8[*tmp1>>AUSHIFT];
|
|
samples += 2;
|
|
tmp1 += 2;
|
|
}
|
|
*pnt += 64;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int synth_1to1_8bit_mono(real *bandPtr,unsigned char *samples,int *pnt)
|
|
{
|
|
short samples_tmp[64];
|
|
short *tmp1 = samples_tmp;
|
|
int i,ret;
|
|
int pnt1 = 0;
|
|
|
|
ret = synth_1to1(bandPtr,0,(unsigned char *)samples_tmp,&pnt1);
|
|
samples += *pnt;
|
|
|
|
for(i=0;i<32;i++) {
|
|
*samples++ = conv16to8[*tmp1>>AUSHIFT];
|
|
tmp1+=2;
|
|
}
|
|
*pnt += 32;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int synth_1to1_8bit_mono2stereo(real *bandPtr,unsigned char *samples,int *pnt)
|
|
{
|
|
short samples_tmp[64];
|
|
short *tmp1 = samples_tmp;
|
|
int i,ret;
|
|
int pnt1 = 0;
|
|
|
|
ret = synth_1to1(bandPtr,0,(unsigned char *)samples_tmp,&pnt1);
|
|
samples += *pnt;
|
|
|
|
for(i=0;i<32;i++) {
|
|
*samples++ = conv16to8[*tmp1>>AUSHIFT];
|
|
*samples++ = conv16to8[*tmp1>>AUSHIFT];
|
|
tmp1 += 2;
|
|
}
|
|
*pnt += 64;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int synth_1to1_mono(real *bandPtr,unsigned char *samples,int *pnt)
|
|
{
|
|
short samples_tmp[64];
|
|
short *tmp1 = samples_tmp;
|
|
int i,ret;
|
|
int pnt1 = 0;
|
|
|
|
ret = synth_1to1(bandPtr,0,(unsigned char *) samples_tmp,&pnt1);
|
|
samples += *pnt;
|
|
|
|
for(i=0;i<32;i++) {
|
|
*( (short *) samples) = *tmp1;
|
|
samples += 2;
|
|
tmp1 += 2;
|
|
}
|
|
*pnt += 64;
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
int synth_1to1_mono2stereo(real *bandPtr,unsigned char *samples,int *pnt)
|
|
{
|
|
int i,ret;
|
|
|
|
ret = synth_1to1(bandPtr,0,samples,pnt);
|
|
samples = samples + *pnt - 128;
|
|
|
|
for(i=0;i<32;i++) {
|
|
((short *)samples)[1] = ((short *)samples)[0];
|
|
samples+=4;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static real buffs[2][2][0x110];
|
|
static const int step = 2;
|
|
static int bo = 1;
|
|
|
|
void init_dct()
|
|
{
|
|
bo = 1;
|
|
memset(buffs,0, sizeof(buffs));
|
|
|
|
};
|
|
|
|
|
|
int synth_1to1(real *bandPtr,int channel,unsigned char *out,int *pnt)
|
|
{
|
|
#ifndef PENTIUM_OPT
|
|
short *samples = (short *) (out + *pnt);
|
|
|
|
real *b0,(*buf)[0x110];
|
|
int clip = 0;
|
|
int bo1;
|
|
#endif
|
|
|
|
// if(have_eq_settings)
|
|
// do_equalizer(bandPtr,channel);
|
|
|
|
#ifndef PENTIUM_OPT
|
|
if(!channel) {
|
|
bo--;
|
|
bo &= 0xf;
|
|
buf = buffs[0];
|
|
}
|
|
else {
|
|
samples++;
|
|
buf = buffs[1];
|
|
}
|
|
|
|
if(bo & 0x1) {
|
|
b0 = buf[0];
|
|
bo1 = bo;
|
|
dct64(buf[1]+((bo+1)&0xf),buf[0]+bo,bandPtr);
|
|
}
|
|
else {
|
|
b0 = buf[1];
|
|
bo1 = bo+1;
|
|
dct64(buf[0]+bo,buf[1]+bo+1,bandPtr);
|
|
}
|
|
|
|
{
|
|
register int j;
|
|
real *window = decwin + 16 - bo1;
|
|
|
|
for (j=16;j;j--,b0+=0x10,window+=0x20,samples+=step)
|
|
{
|
|
real sum;
|
|
sum = window[0x0] * b0[0x0];
|
|
sum -= window[0x1] * b0[0x1];
|
|
sum += window[0x2] * b0[0x2];
|
|
sum -= window[0x3] * b0[0x3];
|
|
sum += window[0x4] * b0[0x4];
|
|
sum -= window[0x5] * b0[0x5];
|
|
sum += window[0x6] * b0[0x6];
|
|
sum -= window[0x7] * b0[0x7];
|
|
sum += window[0x8] * b0[0x8];
|
|
sum -= window[0x9] * b0[0x9];
|
|
sum += window[0xA] * b0[0xA];
|
|
sum -= window[0xB] * b0[0xB];
|
|
sum += window[0xC] * b0[0xC];
|
|
sum -= window[0xD] * b0[0xD];
|
|
sum += window[0xE] * b0[0xE];
|
|
sum -= window[0xF] * b0[0xF];
|
|
|
|
WRITE_SAMPLE(samples,sum,clip);
|
|
}
|
|
|
|
{
|
|
real sum;
|
|
sum = window[0x0] * b0[0x0];
|
|
sum += window[0x2] * b0[0x2];
|
|
sum += window[0x4] * b0[0x4];
|
|
sum += window[0x6] * b0[0x6];
|
|
sum += window[0x8] * b0[0x8];
|
|
sum += window[0xA] * b0[0xA];
|
|
sum += window[0xC] * b0[0xC];
|
|
sum += window[0xE] * b0[0xE];
|
|
WRITE_SAMPLE(samples,sum,clip);
|
|
b0-=0x10,window-=0x20,samples+=step;
|
|
}
|
|
window += bo1<<1;
|
|
|
|
for (j=15;j;j--,b0-=0x10,window-=0x20,samples+=step)
|
|
{
|
|
real sum;
|
|
sum = -window[-0x1] * b0[0x0];
|
|
sum -= window[-0x2] * b0[0x1];
|
|
sum -= window[-0x3] * b0[0x2];
|
|
sum -= window[-0x4] * b0[0x3];
|
|
sum -= window[-0x5] * b0[0x4];
|
|
sum -= window[-0x6] * b0[0x5];
|
|
sum -= window[-0x7] * b0[0x6];
|
|
sum -= window[-0x8] * b0[0x7];
|
|
sum -= window[-0x9] * b0[0x8];
|
|
sum -= window[-0xA] * b0[0x9];
|
|
sum -= window[-0xB] * b0[0xA];
|
|
sum -= window[-0xC] * b0[0xB];
|
|
sum -= window[-0xD] * b0[0xC];
|
|
sum -= window[-0xE] * b0[0xD];
|
|
sum -= window[-0xF] * b0[0xE];
|
|
sum -= window[-0x0] * b0[0xF];
|
|
|
|
WRITE_SAMPLE(samples,sum,clip);
|
|
}
|
|
}
|
|
*pnt += 128;
|
|
|
|
return clip;
|
|
#elif defined(USE_MMX)
|
|
{
|
|
static short buffs[2][2][0x110];
|
|
static int bo = 1;
|
|
short *samples = (short *) (out + *pnt);
|
|
synth_1to1_MMX(bandPtr, channel, samples, (short *) buffs, &bo);
|
|
*pnt += 128;
|
|
return 0;
|
|
}
|
|
#else
|
|
{
|
|
int ret;
|
|
ret = synth_1to1_pent(bandPtr,channel,out+*pnt);
|
|
*pnt += 128;
|
|
return ret;
|
|
}
|
|
#endif
|
|
}
|