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// Copyright (c) 2000-2001 Brad Hughes <bhughes@trolltech.com>
//
// Use, modification and distribution is allowed without limitation,
// warranty, or liability of any kind.
//
#ifndef INLINES_H
#define INLINES_H
#include "fft.h"
// *fast* convenience functions
static inline void
calc_freq(short* dest, short *src)
{
static fft_state *state = NULL;
float tmp_out[257];
int i;
if (!state)
state = fft_init();
fft_perform(src, tmp_out, state);
for (i = 0; i < 256; i++)
dest[i] = ((int) sqrt(tmp_out[i + 1])) >> 8;
}
static inline void
calc_mono_freq(short dest[2][256], short src[2][512], int nch)
{
int i;
short *d, *sl, *sr, tmp[512];
if (nch == 1)
calc_freq(dest[0], src[0]);
else
{
d = tmp;
sl = src[0];
sr = src[1];
for (i = 0; i < 512; i++)
{
*(d++) = (*(sl++) + *(sr++)) >> 1;
}
calc_freq(dest[0], tmp);
}
}
static inline void stereo16_from_multichannel(register short *l,
register short *r,
register short *s,
long cnt, int chan)
{
while (cnt > 0)
{
l[0] = s[0];
r[0] = s[1];
s += chan;
l++;
r++;
cnt--;
}
}
static inline void stereo16_from_stereopcm16(register short *l,
register short *r,
register short *s,
long cnt)
{
while (cnt >= 4l)
{
l[0] = s[0];
r[0] = s[1];
l[1] = s[2];
r[1] = s[3];
l[2] = s[4];
r[2] = s[5];
l[3] = s[6];
r[3] = s[7];
l += 4;
r += 4;
s += 8;
cnt -= 4l;
}
if (cnt > 0l)
{
l[0] = s[0];
r[0] = s[1];
if (cnt > 1l)
{
l[1] = s[2];
r[1] = s[3];
if (cnt > 2l)
{
l[2] = s[4];
r[2] = s[5];
}
}
}
}
static inline void mono16_from_monopcm16(register short *l,
register short *s,
long cnt)
{
while (cnt >= 4l)
{
l[0] = s[0];
l[1] = s[1];
l[2] = s[2];
l[3] = s[3];
l += 4;
s += 4;
cnt -= 4l;
}
if (cnt > 0l)
{
l[0] = s[0];
if (cnt > 1l)
{
l[1] = s[1];
if (cnt > 2l)
{
l[2] = s[2];
}
}
}
}
#endif // INLINES_H
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