kolibrios/programs/media/ac97 mp3/trunk/mp3dec/sbtb.c

383 lines
7.6 KiB
C
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#include <math.h>
/* "fdct.c" */
void fdct32(float *, float *);
void fdct32_dual(float *, float *);
void fdct32_dual_mono(float *, float *);
void fdct16(float *, float *);
void fdct16_dual(float *, float *);
void fdct16_dual_mono(float *, float *);
void fdct8(float *, float *);
void fdct8_dual(float *, float *);
void fdct8_dual_mono(float *, float *);
/* "windowb.c" */
void windowB(float *vbuf, int vb_ptr, unsigned char *pcm);
void windowB_dual(float *vbuf, int vb_ptr, unsigned char *pcm);
void windowB16(float *vbuf, int vb_ptr, unsigned char *pcm);
void windowB16_dual(float *vbuf, int vb_ptr, unsigned char *pcm);
void windowB8(float *vbuf, int vb_ptr, unsigned char *pcm);
void windowB8_dual(float *vbuf, int vb_ptr, unsigned char *pcm);
extern int vb_ptr;
extern int vb2_ptr;
extern float vbuf[512];
extern float vbuf2[512];
void sbtB_mono(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct32(sample, vbuf + vb_ptr);
windowB(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 32) & 511;
pcm += 32;
}
}
void sbtB_dual(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct32_dual(sample, vbuf + vb_ptr);
fdct32_dual(sample + 1, vbuf2 + vb_ptr);
windowB_dual(vbuf, vb_ptr, pcm);
windowB_dual(vbuf2, vb_ptr, pcm + 1);
sample += 64;
vb_ptr = (vb_ptr - 32) & 511;
pcm += 64;
}
}
void sbtB_dual_mono(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct32_dual_mono(sample, vbuf + vb_ptr);
windowB(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 32) & 511;
pcm += 32;
}
}
void sbtB_dual_left(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct32_dual(sample, vbuf + vb_ptr);
windowB(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 32) & 511;
pcm += 32;
}
}
void sbtB_dual_right(float *sample, unsigned char *pcm, int n)
{
int i;
sample++; /* point to right chan */
for (i = 0; i < n; i++)
{
fdct32_dual(sample, vbuf + vb_ptr);
windowB(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 32) & 511;
pcm += 32;
}
}
void sbtB16_mono(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct16(sample, vbuf + vb_ptr);
windowB16(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 16) & 255;
pcm += 16;
}
}
void sbtB16_dual(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct16_dual(sample, vbuf + vb_ptr);
fdct16_dual(sample + 1, vbuf2 + vb_ptr);
windowB16_dual(vbuf, vb_ptr, pcm);
windowB16_dual(vbuf2, vb_ptr, pcm + 1);
sample += 64;
vb_ptr = (vb_ptr - 16) & 255;
pcm += 32;
}
}
void sbtB16_dual_mono(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct16_dual_mono(sample, vbuf + vb_ptr);
windowB16(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 16) & 255;
pcm += 16;
}
}
void sbtB16_dual_left(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct16_dual(sample, vbuf + vb_ptr);
windowB16(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 16) & 255;
pcm += 16;
}
}
void sbtB16_dual_right(float *sample, unsigned char *pcm, int n)
{
int i;
sample++;
for (i = 0; i < n; i++)
{
fdct16_dual(sample, vbuf + vb_ptr);
windowB16(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 16) & 255;
pcm += 16;
}
}
void sbtB8_mono(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct8(sample, vbuf + vb_ptr);
windowB8(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 8) & 127;
pcm += 8;
}
}
void sbtB8_dual(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct8_dual(sample, vbuf + vb_ptr);
fdct8_dual(sample + 1, vbuf2 + vb_ptr);
windowB8_dual(vbuf, vb_ptr, pcm);
windowB8_dual(vbuf2, vb_ptr, pcm + 1);
sample += 64;
vb_ptr = (vb_ptr - 8) & 127;
pcm += 16;
}
}
void sbtB8_dual_mono(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct8_dual_mono(sample, vbuf + vb_ptr);
windowB8(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 8) & 127;
pcm += 8;
}
}
void sbtB8_dual_left(float *sample, unsigned char *pcm, int n)
{
int i;
for (i = 0; i < n; i++)
{
fdct8_dual(sample, vbuf + vb_ptr);
windowB8(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 8) & 127;
pcm += 8;
}
}
void sbtB8_dual_right(float *sample, unsigned char *pcm, int n)
{
int i;
sample++;
for (i = 0; i < n; i++)
{
fdct8_dual(sample, vbuf + vb_ptr);
windowB8(vbuf, vb_ptr, pcm);
sample += 64;
vb_ptr = (vb_ptr - 8) & 127;
pcm += 8;
}
}
void sbtB_mono_L3(float *sample, unsigned char *pcm, int ch)
{
int i;
ch = 0;
for (i = 0; i < 18; i++)
{
fdct32(sample, vbuf + vb_ptr);
windowB(vbuf, vb_ptr, pcm);
sample += 32;
vb_ptr = (vb_ptr - 32) & 511;
pcm += 32;
}
}
void sbtB_dual_L3(float *sample, unsigned char *pcm, int ch)
{
int i;
if (ch == 0)
for (i = 0; i < 18; i++)
{
fdct32(sample, vbuf + vb_ptr);
windowB_dual(vbuf, vb_ptr, pcm);
sample += 32;
vb_ptr = (vb_ptr - 32) & 511;
pcm += 64;
}
else
for (i = 0; i < 18; i++)
{
fdct32(sample, vbuf2 + vb2_ptr);
windowB_dual(vbuf2, vb2_ptr, pcm + 1);
sample += 32;
vb2_ptr = (vb2_ptr - 32) & 511;
pcm += 64;
}
}
void sbtB16_mono_L3(float *sample, unsigned char *pcm, int ch)
{
int i;
ch = 0;
for (i = 0; i < 18; i++)
{
fdct16(sample, vbuf + vb_ptr);
windowB16(vbuf, vb_ptr, pcm);
sample += 32;
vb_ptr = (vb_ptr - 16) & 255;
pcm += 16;
}
}
void sbtB16_dual_L3(float *sample, unsigned char *pcm, int ch)
{
int i;
if (ch == 0)
{
for (i = 0; i < 18; i++)
{
fdct16(sample, vbuf + vb_ptr);
windowB16_dual(vbuf, vb_ptr, pcm);
sample += 32;
vb_ptr = (vb_ptr - 16) & 255;
pcm += 32;
}
}
else
{
for (i = 0; i < 18; i++)
{
fdct16(sample, vbuf2 + vb2_ptr);
windowB16_dual(vbuf2, vb2_ptr, pcm + 1);
sample += 32;
vb2_ptr = (vb2_ptr - 16) & 255;
pcm += 32;
}
}
}
void sbtB8_mono_L3(float *sample, unsigned char *pcm, int ch)
{
int i;
ch = 0;
for (i = 0; i < 18; i++)
{
fdct8(sample, vbuf + vb_ptr);
windowB8(vbuf, vb_ptr, pcm);
sample += 32;
vb_ptr = (vb_ptr - 8) & 127;
pcm += 8;
}
}
void sbtB8_dual_L3(float *sample, unsigned char *pcm, int ch)
{
int i;
if (ch == 0)
{
for (i = 0; i < 18; i++)
{
fdct8(sample, vbuf + vb_ptr);
windowB8_dual(vbuf, vb_ptr, pcm);
sample += 32;
vb_ptr = (vb_ptr - 8) & 127;
pcm += 16;
}
}
else
{
for (i = 0; i < 18; i++)
{
fdct8(sample, vbuf2 + vb2_ptr);
windowB8_dual(vbuf2, vb2_ptr, pcm + 1);
sample += 32;
vb2_ptr = (vb2_ptr - 8) & 127;
pcm += 16;
}
}
}