Added libspeex to revision control, and updated Makefile to use it.
This commit is contained in:
Ryan C. Gordon
parent
b5eaa94d03
commit
7b4a796e44
103 changed files with 27657 additions and 24 deletions
288
code/libspeex/fftwrap.c
Normal file
288
code/libspeex/fftwrap.c
Normal file
|
|
@ -0,0 +1,288 @@
|
|||
/* Copyright (C) 2005-2006 Jean-Marc Valin
|
||||
File: fftwrap.c
|
||||
|
||||
Wrapper for various FFTs
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions
|
||||
are met:
|
||||
|
||||
- Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
|
||||
- Redistributions in binary form must reproduce the above copyright
|
||||
notice, this list of conditions and the following disclaimer in the
|
||||
documentation and/or other materials provided with the distribution.
|
||||
|
||||
- Neither the name of the Xiph.org Foundation nor the names of its
|
||||
contributors may be used to endorse or promote products derived from
|
||||
this software without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
||||
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include "config.h"
|
||||
#endif
|
||||
|
||||
/*#define USE_SMALLFT*/
|
||||
#define USE_KISS_FFT
|
||||
|
||||
|
||||
#include "arch.h"
|
||||
#include "os_support.h"
|
||||
|
||||
#define MAX_FFT_SIZE 2048
|
||||
|
||||
#ifdef FIXED_POINT
|
||||
static int maximize_range(spx_word16_t *in, spx_word16_t *out, spx_word16_t bound, int len)
|
||||
{
|
||||
int i, shift;
|
||||
spx_word16_t max_val = 0;
|
||||
for (i=0;i<len;i++)
|
||||
{
|
||||
if (in[i]>max_val)
|
||||
max_val = in[i];
|
||||
if (-in[i]>max_val)
|
||||
max_val = -in[i];
|
||||
}
|
||||
shift=0;
|
||||
while (max_val <= (bound>>1) && max_val != 0)
|
||||
{
|
||||
max_val <<= 1;
|
||||
shift++;
|
||||
}
|
||||
for (i=0;i<len;i++)
|
||||
{
|
||||
out[i] = SHL16(in[i], shift);
|
||||
}
|
||||
return shift;
|
||||
}
|
||||
|
||||
static void renorm_range(spx_word16_t *in, spx_word16_t *out, int shift, int len)
|
||||
{
|
||||
int i;
|
||||
for (i=0;i<len;i++)
|
||||
{
|
||||
out[i] = PSHR16(in[i], shift);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef USE_SMALLFT
|
||||
|
||||
#include "smallft.h"
|
||||
#include <math.h>
|
||||
|
||||
void *spx_fft_init(int size)
|
||||
{
|
||||
struct drft_lookup *table;
|
||||
table = speex_alloc(sizeof(struct drft_lookup));
|
||||
spx_drft_init((struct drft_lookup *)table, size);
|
||||
return (void*)table;
|
||||
}
|
||||
|
||||
void spx_fft_destroy(void *table)
|
||||
{
|
||||
spx_drft_clear(table);
|
||||
speex_free(table);
|
||||
}
|
||||
|
||||
void spx_fft(void *table, float *in, float *out)
|
||||
{
|
||||
if (in==out)
|
||||
{
|
||||
int i;
|
||||
float scale = 1./((struct drft_lookup *)table)->n;
|
||||
speex_warning("FFT should not be done in-place");
|
||||
for (i=0;i<((struct drft_lookup *)table)->n;i++)
|
||||
out[i] = scale*in[i];
|
||||
} else {
|
||||
int i;
|
||||
float scale = 1./((struct drft_lookup *)table)->n;
|
||||
for (i=0;i<((struct drft_lookup *)table)->n;i++)
|
||||
out[i] = scale*in[i];
|
||||
}
|
||||
spx_drft_forward((struct drft_lookup *)table, out);
|
||||
}
|
||||
|
||||
void spx_ifft(void *table, float *in, float *out)
|
||||
{
|
||||
if (in==out)
|
||||
{
|
||||
speex_warning("FFT should not be done in-place");
|
||||
} else {
|
||||
int i;
|
||||
for (i=0;i<((struct drft_lookup *)table)->n;i++)
|
||||
out[i] = in[i];
|
||||
}
|
||||
spx_drft_backward((struct drft_lookup *)table, out);
|
||||
}
|
||||
|
||||
#elif defined(USE_KISS_FFT)
|
||||
|
||||
#include "kiss_fftr.h"
|
||||
#include "kiss_fft.h"
|
||||
|
||||
struct kiss_config {
|
||||
kiss_fftr_cfg forward;
|
||||
kiss_fftr_cfg backward;
|
||||
int N;
|
||||
};
|
||||
|
||||
void *spx_fft_init(int size)
|
||||
{
|
||||
struct kiss_config *table;
|
||||
table = (struct kiss_config*)speex_alloc(sizeof(struct kiss_config));
|
||||
table->forward = kiss_fftr_alloc(size,0,NULL,NULL);
|
||||
table->backward = kiss_fftr_alloc(size,1,NULL,NULL);
|
||||
table->N = size;
|
||||
return table;
|
||||
}
|
||||
|
||||
void spx_fft_destroy(void *table)
|
||||
{
|
||||
struct kiss_config *t = (struct kiss_config *)table;
|
||||
kiss_fftr_free(t->forward);
|
||||
kiss_fftr_free(t->backward);
|
||||
speex_free(table);
|
||||
}
|
||||
|
||||
#ifdef FIXED_POINT
|
||||
|
||||
void spx_fft(void *table, spx_word16_t *in, spx_word16_t *out)
|
||||
{
|
||||
int shift;
|
||||
struct kiss_config *t = (struct kiss_config *)table;
|
||||
shift = maximize_range(in, in, 32000, t->N);
|
||||
kiss_fftr2(t->forward, in, out);
|
||||
renorm_range(in, in, shift, t->N);
|
||||
renorm_range(out, out, shift, t->N);
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
void spx_fft(void *table, spx_word16_t *in, spx_word16_t *out)
|
||||
{
|
||||
int i;
|
||||
float scale;
|
||||
struct kiss_config *t = (struct kiss_config *)table;
|
||||
scale = 1./t->N;
|
||||
kiss_fftr2(t->forward, in, out);
|
||||
for (i=0;i<t->N;i++)
|
||||
out[i] *= scale;
|
||||
}
|
||||
#endif
|
||||
|
||||
void spx_ifft(void *table, spx_word16_t *in, spx_word16_t *out)
|
||||
{
|
||||
struct kiss_config *t = (struct kiss_config *)table;
|
||||
kiss_fftri2(t->backward, in, out);
|
||||
}
|
||||
|
||||
|
||||
#else
|
||||
|
||||
#error No other FFT implemented
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef FIXED_POINT
|
||||
/*#include "smallft.h"*/
|
||||
|
||||
|
||||
void spx_fft_float(void *table, float *in, float *out)
|
||||
{
|
||||
int i;
|
||||
#ifdef USE_SMALLFT
|
||||
int N = ((struct drft_lookup *)table)->n;
|
||||
#elif defined(USE_KISS_FFT)
|
||||
int N = ((struct kiss_config *)table)->N;
|
||||
#else
|
||||
#endif
|
||||
#ifdef VAR_ARRAYS
|
||||
spx_word16_t _in[N];
|
||||
spx_word16_t _out[N];
|
||||
#else
|
||||
spx_word16_t _in[MAX_FFT_SIZE];
|
||||
spx_word16_t _out[MAX_FFT_SIZE];
|
||||
#endif
|
||||
for (i=0;i<N;i++)
|
||||
_in[i] = (int)floor(.5+in[i]);
|
||||
spx_fft(table, _in, _out);
|
||||
for (i=0;i<N;i++)
|
||||
out[i] = _out[i];
|
||||
#if 0
|
||||
if (!fixed_point)
|
||||
{
|
||||
float scale;
|
||||
struct drft_lookup t;
|
||||
spx_drft_init(&t, ((struct kiss_config *)table)->N);
|
||||
scale = 1./((struct kiss_config *)table)->N;
|
||||
for (i=0;i<((struct kiss_config *)table)->N;i++)
|
||||
out[i] = scale*in[i];
|
||||
spx_drft_forward(&t, out);
|
||||
spx_drft_clear(&t);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
void spx_ifft_float(void *table, float *in, float *out)
|
||||
{
|
||||
int i;
|
||||
#ifdef USE_SMALLFT
|
||||
int N = ((struct drft_lookup *)table)->n;
|
||||
#elif defined(USE_KISS_FFT)
|
||||
int N = ((struct kiss_config *)table)->N;
|
||||
#else
|
||||
#endif
|
||||
#ifdef VAR_ARRAYS
|
||||
spx_word16_t _in[N];
|
||||
spx_word16_t _out[N];
|
||||
#else
|
||||
spx_word16_t _in[MAX_FFT_SIZE];
|
||||
spx_word16_t _out[MAX_FFT_SIZE];
|
||||
#endif
|
||||
for (i=0;i<N;i++)
|
||||
_in[i] = (int)floor(.5+in[i]);
|
||||
spx_ifft(table, _in, _out);
|
||||
for (i=0;i<N;i++)
|
||||
out[i] = _out[i];
|
||||
#if 0
|
||||
if (!fixed_point)
|
||||
{
|
||||
int i;
|
||||
struct drft_lookup t;
|
||||
spx_drft_init(&t, ((struct kiss_config *)table)->N);
|
||||
for (i=0;i<((struct kiss_config *)table)->N;i++)
|
||||
out[i] = in[i];
|
||||
spx_drft_backward(&t, out);
|
||||
spx_drft_clear(&t);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
void spx_fft_float(void *table, float *in, float *out)
|
||||
{
|
||||
spx_fft(table, in, out);
|
||||
}
|
||||
void spx_ifft_float(void *table, float *in, float *out)
|
||||
{
|
||||
spx_ifft(table, in, out);
|
||||
}
|
||||
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue