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Commit 2214ab02 authored by Alessio Bazzica's avatar Alessio Bazzica Committed by Commit Bot
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RNNoise lib cleaning 

Removing unneeded files.

Bug: webrtc:9076
Change-Id: If54b612ef8c9e5c27f868ab039a340fbbc215445
Reviewed-on: https://chromium-review.googlesource.com/995934Reviewed-by: default avatarTom Sepez <tsepez@chromium.org>
Commit-Queue: Ale Bzk <alessiob@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550712}
parent cd09887d
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third_party/rnnoise/README.chromium
View file @ 2214ab02
...@@ -19,6 +19,5 @@ Local Modifications: ...@@ -19,6 +19,5 @@ Local Modifications:
- rnn.c - rnn.c
- rnn_data.c - rnn_data.c
- tansig_table.h - tansig_table.h
* rnn_data.c cleaned and renamed into rnn_vad_weights.h
* rnn.c merged with tansig_table.h, cleaned and renamed into rnn_activations.h
* KissFFT: non-floating point parts removed, code clean, from C to C++ * KissFFT: non-floating point parts removed, code clean, from C to C++
class wrapper added
third_party/rnnoise/src/_kiss_fft_guts.h deleted 100644 → 0
View file @ cd09887d
/*Copyright (c) 2003-2004, Mark Borgerding
All rights reserved.
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.
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 COPYRIGHT OWNER 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.*/
#ifndef THIRD_PARTY_RNNOISE_SRC__KISS_FFT_GUTS_H_
#define THIRD_PARTY_RNNOISE_SRC__KISS_FFT_GUTS_H_
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
/* kiss_fft.h
defines kiss_fft_scalar as either short or a float type
and defines
typedef struct { kiss_fft_scalar r; kiss_fft_scalar i; }kiss_fft_cpx; */
#include "kiss_fft.h"
/*
Explanation of macros dealing with complex math:
C_MUL(m,a,b) : m = a*b
C_FIXDIV( c , div ) : if a fixed point impl., c /= div. noop otherwise
C_SUB( res, a,b) : res = a - b
C_SUBFROM( res , a) : res -= a
C_ADDTO( res , a) : res += a
* */
#ifdef FIXED_POINT
// #include "arch.h"
#define SAMP_MAX 2147483647
#define TWID_MAX 32767
#define TRIG_UPSCALE 1
#define SAMP_MIN -SAMP_MAX
#define S_MUL(a, b) MULT16_32_Q15(b, a)
#define C_MUL(m, a, b) \
do { \
(m).r = SUB32_ovflw(S_MUL((a).r, (b).r), S_MUL((a).i, (b).i)); \
(m).i = ADD32_ovflw(S_MUL((a).r, (b).i), S_MUL((a).i, (b).r)); \
} while (0)
#define C_MULC(m, a, b) \
do { \
(m).r = ADD32_ovflw(S_MUL((a).r, (b).r), S_MUL((a).i, (b).i)); \
(m).i = SUB32_ovflw(S_MUL((a).i, (b).r), S_MUL((a).r, (b).i)); \
} while (0)
#define C_MULBYSCALAR(c, s) \
do { \
(c).r = S_MUL((c).r, s); \
(c).i = S_MUL((c).i, s); \
} while (0)
#define DIVSCALAR(x, k) (x) = S_MUL(x, (TWID_MAX - ((k) >> 1)) / (k) + 1)
#define C_FIXDIV(c, div) \
do { \
DIVSCALAR((c).r, div); \
DIVSCALAR((c).i, div); \
} while (0)
#define C_ADD(res, a, b) \
do { \
(res).r = ADD32_ovflw((a).r, (b).r); \
(res).i = ADD32_ovflw((a).i, (b).i); \
} while (0)
#define C_SUB(res, a, b) \
do { \
(res).r = SUB32_ovflw((a).r, (b).r); \
(res).i = SUB32_ovflw((a).i, (b).i); \
} while (0)
#define C_ADDTO(res, a) \
do { \
(res).r = ADD32_ovflw((res).r, (a).r); \
(res).i = ADD32_ovflw((res).i, (a).i); \
} while (0)
#define C_SUBFROM(res, a) \
do { \
(res).r = ADD32_ovflw((res).r, (a).r); \
(res).i = SUB32_ovflw((res).i, (a).i); \
} while (0)
// #if defined(OPUS_ARM_INLINE_ASM)
// #include "arm/kiss_fft_armv4.h"
// #endif
// #if defined(OPUS_ARM_INLINE_EDSP)
// #include "arm/kiss_fft_armv5e.h"
// #endif
// #if defined(MIPSr1_ASM)
// #include "mips/kiss_fft_mipsr1.h"
// #endif
#else /* not FIXED_POINT*/
#define S_MUL(a, b) ((a) * (b))
#define C_MUL(m, a, b) \
do { \
(m).r = (a).r * (b).r - (a).i * (b).i; \
(m).i = (a).r * (b).i + (a).i * (b).r; \
} while (0)
#define C_MULC(m, a, b) \
do { \
(m).r = (a).r * (b).r + (a).i * (b).i; \
(m).i = (a).i * (b).r - (a).r * (b).i; \
} while (0)
#define C_MUL4(m, a, b) C_MUL(m, a, b)
#define C_FIXDIV(c, div) /* NOOP */
#define C_MULBYSCALAR(c, s) \
do { \
(c).r *= (s); \
(c).i *= (s); \
} while (0)
#endif
#ifndef CHECK_OVERFLOW_OP
#define CHECK_OVERFLOW_OP(a, op, b) /* noop */
#endif
#ifndef C_ADD
#define C_ADD(res, a, b) \
do { \
CHECK_OVERFLOW_OP((a).r, +, (b).r) \
CHECK_OVERFLOW_OP((a).i, +, (b).i) \
(res).r = (a).r + (b).r; \
(res).i = (a).i + (b).i; \
} while (0)
#define C_SUB(res, a, b) \
do { \
CHECK_OVERFLOW_OP((a).r, -, (b).r) \
CHECK_OVERFLOW_OP((a).i, -, (b).i) \
(res).r = (a).r - (b).r; \
(res).i = (a).i - (b).i; \
} while (0)
#define C_ADDTO(res, a) \
do { \
CHECK_OVERFLOW_OP((res).r, +, (a).r) \
CHECK_OVERFLOW_OP((res).i, +, (a).i) \
(res).r += (a).r; \
(res).i += (a).i; \
} while (0)
#define C_SUBFROM(res, a) \
do { \
CHECK_OVERFLOW_OP((res).r, -, (a).r) \
CHECK_OVERFLOW_OP((res).i, -, (a).i) \
(res).r -= (a).r; \
(res).i -= (a).i; \
} while (0)
#endif /* C_ADD defined */
#ifdef FIXED_POINT
/*# define KISS_FFT_COS(phase)
TRIG_UPSCALE*floor(MIN(32767,MAX(-32767,.5+32768 * cos (phase)))) # define
KISS_FFT_SIN(phase) TRIG_UPSCALE*floor(MIN(32767,MAX(-32767,.5+32768 * sin
(phase))))*/
#define KISS_FFT_COS(phase) floor(.5 + TWID_MAX * cos(phase))
#define KISS_FFT_SIN(phase) floor(.5 + TWID_MAX * sin(phase))
#define HALF_OF(x) ((x) >> 1)
#elif defined(USE_SIMD)
#define KISS_FFT_COS(phase) _mm_set1_ps(cos(phase))
#define KISS_FFT_SIN(phase) _mm_set1_ps(sin(phase))
#define HALF_OF(x) ((x)*_mm_set1_ps(.5f))
#else
#define KISS_FFT_COS(phase) (kiss_fft_scalar) cos(phase)
#define KISS_FFT_SIN(phase) (kiss_fft_scalar) sin(phase)
#define HALF_OF(x) ((x)*.5f)
#endif
#define kf_cexp(x, phase) \
do { \
(x)->r = KISS_FFT_COS(phase); \
(x)->i = KISS_FFT_SIN(phase); \
} while (0)
#define kf_cexp2(x, phase) \
do { \
(x)->r = TRIG_UPSCALE * celt_cos_norm((phase)); \
(x)->i = TRIG_UPSCALE * celt_cos_norm((phase)-32768); \
} while (0)
#endif // THIRD_PARTY_RNNOISE_SRC__KISS_FFT_GUTS_H_
third_party/rnnoise/src/kiss_fft.c deleted 100644 → 0
View file @ cd09887d
/*Copyright (c) 2003-2004, Mark Borgerding
Lots of modifications by Jean-Marc Valin
Copyright (c) 2005-2007, Xiph.Org Foundation
Copyright (c) 2008, Xiph.Org Foundation, CSIRO
All rights reserved.
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.
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 COPYRIGHT OWNER 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.*/
/* This code is originally from Mark Borgerding's KISS-FFT but has been
heavily modified to better suit Opus */
#ifndef SKIP_CONFIG_H
# ifdef HAVE_CONFIG_H
# include "config.h"
# endif
#endif
#include "_kiss_fft_guts.h"
#define CUSTOM_MODES
/* The guts header contains all the multiplication and addition macros that are defined for
complex numbers. It also delares the kf_ internal functions.
*/
static void kf_bfly2(
kiss_fft_cpx * Fout,
int m,
int N
)
{
kiss_fft_cpx * Fout2;
int i;
(void)m;
#ifdef CUSTOM_MODES
if (m==1)
{
celt_assert(m==1);
for (i=0;i<N;i++)
{
kiss_fft_cpx t;
Fout2 = Fout + 1;
t = *Fout2;
C_SUB( *Fout2 , *Fout , t );
C_ADDTO( *Fout , t );
Fout += 2;
}
} else
#endif
{
opus_val16 tw;
tw = QCONST16(0.7071067812f, 15);
/* We know that m==4 here because the radix-2 is just after a radix-4 */
celt_assert(m==4);
for (i=0;i<N;i++)
{
kiss_fft_cpx t;
Fout2 = Fout + 4;
t = Fout2[0];
C_SUB( Fout2[0] , Fout[0] , t );
C_ADDTO( Fout[0] , t );
t.r = S_MUL(ADD32_ovflw(Fout2[1].r, Fout2[1].i), tw);
t.i = S_MUL(SUB32_ovflw(Fout2[1].i, Fout2[1].r), tw);
C_SUB( Fout2[1] , Fout[1] , t );
C_ADDTO( Fout[1] , t );
t.r = Fout2[2].i;
t.i = -Fout2[2].r;
C_SUB( Fout2[2] , Fout[2] , t );
C_ADDTO( Fout[2] , t );
t.r = S_MUL(SUB32_ovflw(Fout2[3].i, Fout2[3].r), tw);
t.i = S_MUL(NEG32_ovflw(ADD32_ovflw(Fout2[3].i, Fout2[3].r)), tw);
C_SUB( Fout2[3] , Fout[3] , t );
C_ADDTO( Fout[3] , t );
Fout += 8;
}
}
}
static void kf_bfly4(
kiss_fft_cpx * Fout,
const size_t fstride,
const kiss_fft_state *st,
int m,
int N,
int mm
)
{
int i;
if (m==1)
{
/* Degenerate case where all the twiddles are 1. */
for (i=0;i<N;i++)
{
kiss_fft_cpx scratch0, scratch1;
C_SUB( scratch0 , *Fout, Fout[2] );
C_ADDTO(*Fout, Fout[2]);
C_ADD( scratch1 , Fout[1] , Fout[3] );
C_SUB( Fout[2], *Fout, scratch1 );
C_ADDTO( *Fout , scratch1 );
C_SUB( scratch1 , Fout[1] , Fout[3] );
Fout[1].r = ADD32_ovflw(scratch0.r, scratch1.i);
Fout[1].i = SUB32_ovflw(scratch0.i, scratch1.r);
Fout[3].r = SUB32_ovflw(scratch0.r, scratch1.i);
Fout[3].i = ADD32_ovflw(scratch0.i, scratch1.r);
Fout+=4;
}
} else {
int j;
kiss_fft_cpx scratch[6];
const kiss_twiddle_cpx *tw1,*tw2,*tw3;
const int m2=2*m;
const int m3=3*m;
kiss_fft_cpx * Fout_beg = Fout;
for (i=0;i<N;i++)
{
Fout = Fout_beg + i*mm;
tw3 = tw2 = tw1 = st->twiddles;
/* m is guaranteed to be a multiple of 4. */
for (j=0;j<m;j++)
{
C_MUL(scratch[0],Fout[m] , *tw1 );
C_MUL(scratch[1],Fout[m2] , *tw2 );
C_MUL(scratch[2],Fout[m3] , *tw3 );
C_SUB( scratch[5] , *Fout, scratch[1] );
C_ADDTO(*Fout, scratch[1]);
C_ADD( scratch[3] , scratch[0] , scratch[2] );
C_SUB( scratch[4] , scratch[0] , scratch[2] );
C_SUB( Fout[m2], *Fout, scratch[3] );
tw1 += fstride;
tw2 += fstride*2;
tw3 += fstride*3;
C_ADDTO( *Fout , scratch[3] );
Fout[m].r = ADD32_ovflw(scratch[5].r, scratch[4].i);
Fout[m].i = SUB32_ovflw(scratch[5].i, scratch[4].r);
Fout[m3].r = SUB32_ovflw(scratch[5].r, scratch[4].i);
Fout[m3].i = ADD32_ovflw(scratch[5].i, scratch[4].r);
++Fout;
}
}
}
}
#ifndef RADIX_TWO_ONLY
static void kf_bfly3(
kiss_fft_cpx * Fout,
const size_t fstride,
const kiss_fft_state *st,
int m,
int N,
int mm
)
{
int i;
size_t k;
const size_t m2 = 2*m;
const kiss_twiddle_cpx *tw1,*tw2;
kiss_fft_cpx scratch[5];
kiss_twiddle_cpx epi3;
kiss_fft_cpx * Fout_beg = Fout;
#ifdef FIXED_POINT
/*epi3.r = -16384;*/ /* Unused */
epi3.i = -28378;
#else
epi3 = st->twiddles[fstride*m];
#endif
for (i=0;i<N;i++)
{
Fout = Fout_beg + i*mm;
tw1=tw2=st->twiddles;
/* For non-custom modes, m is guaranteed to be a multiple of 4. */
k=m;
do {
C_MUL(scratch[1],Fout[m] , *tw1);
C_MUL(scratch[2],Fout[m2] , *tw2);
C_ADD(scratch[3],scratch[1],scratch[2]);
C_SUB(scratch[0],scratch[1],scratch[2]);
tw1 += fstride;
tw2 += fstride*2;
Fout[m].r = SUB32_ovflw(Fout->r, HALF_OF(scratch[3].r));
Fout[m].i = SUB32_ovflw(Fout->i, HALF_OF(scratch[3].i));
C_MULBYSCALAR( scratch[0] , epi3.i );
C_ADDTO(*Fout,scratch[3]);
Fout[m2].r = ADD32_ovflw(Fout[m].r, scratch[0].i);
Fout[m2].i = SUB32_ovflw(Fout[m].i, scratch[0].r);
Fout[m].r = SUB32_ovflw(Fout[m].r, scratch[0].i);
Fout[m].i = ADD32_ovflw(Fout[m].i, scratch[0].r);
++Fout;
} while(--k);
}
}
#ifndef OVERRIDE_kf_bfly5
static void kf_bfly5(
kiss_fft_cpx * Fout,
const size_t fstride,
const kiss_fft_state *st,
int m,
int N,
int mm
)
{
kiss_fft_cpx *Fout0,*Fout1,*Fout2,*Fout3,*Fout4;
int i, u;
kiss_fft_cpx scratch[13];
const kiss_twiddle_cpx *tw;
kiss_twiddle_cpx ya,yb;
kiss_fft_cpx * Fout_beg = Fout;
#ifdef FIXED_POINT
ya.r = 10126;
ya.i = -31164;
yb.r = -26510;
yb.i = -19261;
#else
ya = st->twiddles[fstride*m];
yb = st->twiddles[fstride*2*m];
#endif
tw=st->twiddles;
for (i=0;i<N;i++)
{
Fout = Fout_beg + i*mm;
Fout0=Fout;
Fout1=Fout0+m;
Fout2=Fout0+2*m;
Fout3=Fout0+3*m;
Fout4=Fout0+4*m;
/* For non-custom modes, m is guaranteed to be a multiple of 4. */
for ( u=0; u<m; ++u ) {
scratch[0] = *Fout0;
C_MUL(scratch[1] ,*Fout1, tw[u*fstride]);
C_MUL(scratch[2] ,*Fout2, tw[2*u*fstride]);
C_MUL(scratch[3] ,*Fout3, tw[3*u*fstride]);
C_MUL(scratch[4] ,*Fout4, tw[4*u*fstride]);
C_ADD( scratch[7],scratch[1],scratch[4]);
C_SUB( scratch[10],scratch[1],scratch[4]);
C_ADD( scratch[8],scratch[2],scratch[3]);
C_SUB( scratch[9],scratch[2],scratch[3]);
Fout0->r = ADD32_ovflw(Fout0->r, ADD32_ovflw(scratch[7].r, scratch[8].r));
Fout0->i = ADD32_ovflw(Fout0->i, ADD32_ovflw(scratch[7].i, scratch[8].i));
scratch[5].r = ADD32_ovflw(scratch[0].r, ADD32_ovflw(S_MUL(scratch[7].r,ya.r), S_MUL(scratch[8].r,yb.r)));
scratch[5].i = ADD32_ovflw(scratch[0].i, ADD32_ovflw(S_MUL(scratch[7].i,ya.r), S_MUL(scratch[8].i,yb.r)));
scratch[6].r = ADD32_ovflw(S_MUL(scratch[10].i,ya.i), S_MUL(scratch[9].i,yb.i));
scratch[6].i = NEG32_ovflw(ADD32_ovflw(S_MUL(scratch[10].r,ya.i), S_MUL(scratch[9].r,yb.i)));
C_SUB(*Fout1,scratch[5],scratch[6]);
C_ADD(*Fout4,scratch[5],scratch[6]);
scratch[11].r = ADD32_ovflw(scratch[0].r, ADD32_ovflw(S_MUL(scratch[7].r,yb.r), S_MUL(scratch[8].r,ya.r)));
scratch[11].i = ADD32_ovflw(scratch[0].i, ADD32_ovflw(S_MUL(scratch[7].i,yb.r), S_MUL(scratch[8].i,ya.r)));
scratch[12].r = SUB32_ovflw(S_MUL(scratch[9].i,ya.i), S_MUL(scratch[10].i,yb.i));
scratch[12].i = SUB32_ovflw(S_MUL(scratch[10].r,yb.i), S_MUL(scratch[9].r,ya.i));
C_ADD(*Fout2,scratch[11],scratch[12]);
C_SUB(*Fout3,scratch[11],scratch[12]);
++Fout0;++Fout1;++Fout2;++Fout3;++Fout4;
}
}
}
#endif /* OVERRIDE_kf_bfly5 */
#endif
#ifdef CUSTOM_MODES
static
void compute_bitrev_table(
int Fout,
opus_int16 *f,
const size_t fstride,
int in_stride,
opus_int16 * factors,
const kiss_fft_state *st
)
{
const int p=*factors++; /* the radix */
const int m=*factors++; /* stage's fft length/p */
/*printf ("fft %d %d %d %d %d %d\n", p*m, m, p, s2, fstride*in_stride, N);*/
if (m==1)
{
int j;
for (j=0;j<p;j++)
{
*f = Fout+j;
f += fstride*in_stride;
}
} else {
int j;
for (j=0;j<p;j++)
{
compute_bitrev_table( Fout , f, fstride*p, in_stride, factors,st);
f += fstride*in_stride;
Fout += m;
}
}
}
/* facbuf is populated by p1,m1,p2,m2, ...
where
p[i] * m[i] = m[i-1]
m0 = n */
static
int kf_factor(int n,opus_int16 * facbuf)
{
int p=4;
int i;
int stages=0;
int nbak = n;
/*factor out powers of 4, powers of 2, then any remaining primes */
do {
while (n % p) {
switch (p) {
case 4: p = 2; break;
case 2: p = 3; break;
default: p += 2; break;
}
if (p>32000 || (opus_int32)p*(opus_int32)p > n)
p = n; /* no more factors, skip to end */
}
n /= p;
#ifdef RADIX_TWO_ONLY
if (p!=2 && p != 4)
#else
if (p>5)
#endif
{
return 0;
}
facbuf[2*stages] = p;
if (p==2 && stages > 1)
{
facbuf[2*stages] = 4;
facbuf[2] = 2;
}
stages++;
} while (n > 1);
n = nbak;
/* Reverse the order to get the radix 4 at the end, so we can use the
fast degenerate case. It turns out that reversing the order also
improves the noise behaviour. */
for (i=0;i<stages/2;i++)
{
int tmp;
tmp = facbuf[2*i];
facbuf[2*i] = facbuf[2*(stages-i-1)];
facbuf[2*(stages-i-1)] = tmp;
}
for (i=0;i<stages;i++)
{
n /= facbuf[2*i];
facbuf[2*i+1] = n;
}
return 1;
}
static void compute_twiddles(kiss_twiddle_cpx *twiddles, int nfft)
{
int i;
#ifdef FIXED_POINT
for (i=0;i<nfft;++i) {
opus_val32 phase = -i;
kf_cexp2(twiddles+i, DIV32(SHL32(phase,17),nfft));
}
#else
for (i=0;i<nfft;++i) {
const double pi=3.14159265358979323846264338327;
double phase = ( -2*pi /nfft ) * i;
kf_cexp(twiddles+i, phase );
}
#endif
}
int opus_fft_alloc_arch_c(kiss_fft_state *st) {
(void)st;
return 0;
}
/*
*
* Allocates all necessary storage space for the fft and ifft.
* The return value is a contiguous block of memory. As such,
* It can be freed with free().
* */
kiss_fft_state *opus_fft_alloc_twiddles(int nfft,void * mem,size_t * lenmem,
const kiss_fft_state *base, int arch)
{
kiss_fft_state *st=NULL;
size_t memneeded = sizeof(struct kiss_fft_state); /* twiddle factors*/
if ( lenmem==NULL ) {
st = ( kiss_fft_state*)KISS_FFT_MALLOC( memneeded );
}else{
if (mem != NULL && *lenmem >= memneeded)
st = (kiss_fft_state*)mem;
*lenmem = memneeded;
}
if (st) {
opus_int16 *bitrev;
kiss_twiddle_cpx *twiddles;
st->nfft=nfft;
#ifdef FIXED_POINT
st->scale_shift = celt_ilog2(st->nfft);
if (st->nfft == 1<<st->scale_shift)
st->scale = Q15ONE;
else
st->scale = (1073741824+st->nfft/2)/st->nfft>>(15-st->scale_shift);
#else
st->scale = 1.f / nfft;
// fprintf(stderr, "NFFT: %d -> %f\n", nfft, st->scale);
#endif
if (base != NULL)
{
st->twiddles = base->twiddles;
st->shift = 0;
while (st->shift < 32 && nfft<<st->shift != base->nfft)
st->shift++;
if (st->shift>=32)
goto fail;
} else {
st->twiddles = twiddles = (kiss_twiddle_cpx*)KISS_FFT_MALLOC(sizeof(kiss_twiddle_cpx)*nfft);
compute_twiddles(twiddles, nfft);
st->shift = -1;
}
if (!kf_factor(nfft,st->factors))
{
goto fail;
}
/* bitrev */
st->bitrev = bitrev = (opus_int16*)KISS_FFT_MALLOC(sizeof(opus_int16)*nfft);
if (st->bitrev==NULL)
goto fail;
compute_bitrev_table(0, bitrev, 1,1, st->factors,st);
/* Initialize architecture specific fft parameters */
if (opus_fft_alloc_arch(st, arch))
goto fail;
}
return st;
fail:
opus_fft_free(st, arch);
return NULL;
}
kiss_fft_state *opus_fft_alloc(int nfft,void * mem,size_t * lenmem, int arch)
{
return opus_fft_alloc_twiddles(nfft, mem, lenmem, NULL, arch);
}
void opus_fft_free_arch_c(kiss_fft_state *st) {
(void)st;
}
void opus_fft_free(const kiss_fft_state *cfg, int arch)
{
if (cfg)
{
opus_fft_free_arch((kiss_fft_state *)cfg, arch);
opus_free((opus_int16*)cfg->bitrev);
if (cfg->shift < 0)
opus_free((kiss_twiddle_cpx*)cfg->twiddles);
opus_free((kiss_fft_state*)cfg);
}
}
#endif /* CUSTOM_MODES */
void opus_fft_impl(const kiss_fft_state *st, kiss_fft_cpx *fout)
{
int m2, m;
int p;
int L;
int fstride[MAXFACTORS];
int i;
int shift;
/* st->shift can be -1 */
shift = st->shift>0 ? st->shift : 0;
fstride[0] = 1;
L=0;
do {
p = st->factors[2*L];
m = st->factors[2*L+1];
fstride[L+1] = fstride[L]*p;
L++;
} while(m!=1);
m = st->factors[2*L-1];
for (i=L-1;i>=0;i--)
{
if (i!=0)
m2 = st->factors[2*i-1];
else
m2 = 1;
switch (st->factors[2*i])
{
case 2:
kf_bfly2(fout, m, fstride[i]);
break;
case 4:
kf_bfly4(fout,fstride[i]<<shift,st,m, fstride[i], m2);
break;
#ifndef RADIX_TWO_ONLY
case 3:
kf_bfly3(fout,fstride[i]<<shift,st,m, fstride[i], m2);
break;
case 5:
kf_bfly5(fout,fstride[i]<<shift,st,m, fstride[i], m2);
break;
#endif
}
m = m2;
}
}
void opus_fft_c(const kiss_fft_state *st,const kiss_fft_cpx *fin, kiss_fft_cpx *fout)
{
int i;
opus_val16 scale;
// #ifdef FIXED_POINT
// // Allows us to scale with MULT16_32_Q16(), which is faster than
// // MULT16_32_Q15() on ARM.
// int scale_shift = st->scale_shift-1;
// #endif
scale = st->scale;
celt_assert2 (fin != fout, "In-place FFT not supported");
/* Bit-reverse the input */
// fprintf(stderr, "nfft %d\n", st->nfft);
// celt_assert(0);
for (i=0;i<st->nfft;i++)
{
kiss_fft_cpx x = fin[i];
// fout[st->bitrev[i]].r = SHR32(MULT16_32_Q16(scale, x.r), scale_shift);
// fout[st->bitrev[i]].i = SHR32(MULT16_32_Q16(scale, x.i), scale_shift);
fout[st->bitrev[i]].r = scale * x.r;
fout[st->bitrev[i]].i = scale * x.i;
}
opus_fft_impl(st, fout);
}
void opus_ifft_c(const kiss_fft_state *st,const kiss_fft_cpx *fin,kiss_fft_cpx *fout)
{
int i;
celt_assert2 (fin != fout, "In-place FFT not supported");
/* Bit-reverse the input */
for (i=0;i<st->nfft;i++)
fout[st->bitrev[i]] = fin[i];
for (i=0;i<st->nfft;i++)
fout[i].i = -fout[i].i;
opus_fft_impl(st, fout);
for (i=0;i<st->nfft;i++)
fout[i].i = -fout[i].i;
}
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