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ardour/libs/zita-convolver/zita-convolver.cc

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// ----------------------------------------------------------------------------
//
// Copyright (C) 2006-2018 Fons Adriaensen <fons@linuxaudio.org>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef _MSC_VER
#include <windows.h> // Needed for MSVC 'Sleep()'
#endif
#include "zita-convolver/zita-convolver.h"
using namespace ArdourZita;
float Convproc::_mac_cost = 1.0f;
float Convproc::_fft_cost = 5.0f;
static float*
calloc_real (uint32_t k)
{
float* p = fftwf_alloc_real (k);
if (!p) {
throw (Converror (Converror::MEM_ALLOC));
}
memset (p, 0, k * sizeof (float));
return p;
}
static fftwf_complex*
calloc_complex (uint32_t k)
{
fftwf_complex* p = fftwf_alloc_complex (k);
if (!p) {
throw (Converror (Converror::MEM_ALLOC));
}
memset (p, 0, k * sizeof (fftwf_complex));
return p;
}
Convproc::Convproc (void)
: _state (ST_IDLE)
, _options (0)
, _ninp (0)
, _nout (0)
, _quantum (0)
, _minpart (0)
, _maxpart (0)
, _nlevels (0)
, _latecnt (0)
{
memset (_inpbuff, 0, MAXINP * sizeof (float*));
memset (_outbuff, 0, MAXOUT * sizeof (float*));
memset (_convlev, 0, MAXLEV * sizeof (Convlevel*));
}
Convproc::~Convproc (void)
{
stop_process ();
cleanup ();
}
void
Convproc::set_options (uint32_t options)
{
_options = options;
}
int
Convproc::configure (uint32_t ninp,
uint32_t nout,
uint32_t maxsize,
uint32_t quantum,
uint32_t minpart,
uint32_t maxpart,
float density)
{
uint32_t offs, npar, size, pind, nmin, i;
int prio, step, d, r, s;
float cfft, cmac;
if (_state != ST_IDLE) {
return Converror::BAD_STATE;
}
if ( (ninp < 1) || (ninp > MAXINP)
|| (nout < 1) || (nout > MAXOUT)
|| (quantum & (quantum - 1))
|| (quantum < MINQUANT)
|| (quantum > MAXQUANT)
|| (minpart & (minpart - 1))
|| (minpart < MINPART)
|| (minpart < quantum)
|| (minpart > MAXDIVIS * quantum)
|| (maxpart & (maxpart - 1))
|| (maxpart > MAXPART)
|| (maxpart < minpart)) {
return Converror::BAD_PARAM;
}
nmin = (ninp < nout) ? ninp : nout;
if (density <= 0.0f) {
density = 1.0f / nmin;
}
if (density > 1.0f) {
density = 1.0f;
}
cfft = _fft_cost * (ninp + nout);
cmac = _mac_cost * ninp * nout * density;
step = (cfft < 4 * cmac) ? 1 : 2;
if (step == 2) {
r = maxpart / minpart;
s = (r & 0xAAAA) ? 1 : 2;
} else {
s = 1;
}
nmin = (s == 1) ? 2 : 6;
if (minpart == quantum) {
nmin++;
}
prio = 0;
size = quantum;
while (size < minpart) {
prio -= 1;
size <<= 1;
}
try {
for (offs = pind = 0; offs < maxsize; pind++) {
npar = (maxsize - offs + size - 1) / size;
if ((size < maxpart) && (npar > nmin)) {
r = 1 << s;
d = npar - nmin;
d = d - (d + r - 1) / r;
if (cfft < d * cmac) {
npar = nmin;
}
}
_convlev[pind] = new Convlevel ();
_convlev[pind]->configure (prio, offs, npar, size, _options);
offs += size * npar;
if (offs < maxsize) {
prio -= s;
size <<= s;
s = step;
nmin = (s == 1) ? 2 : 6;
}
}
_ninp = ninp;
_nout = nout;
_quantum = quantum;
_minpart = minpart;
_maxpart = size;
_nlevels = pind;
_latecnt = 0;
_inpsize = 2 * size;
for (i = 0; i < ninp; i++) {
_inpbuff[i] = new float[_inpsize];
}
for (i = 0; i < nout; i++) {
_outbuff[i] = new float[_minpart];
}
} catch (...) {
cleanup ();
return Converror::MEM_ALLOC;
}
_state = ST_STOP;
return 0;
}
int
Convproc::impdata_create (uint32_t inp,
uint32_t out,
int32_t step,
float* data,
int32_t ind0,
int32_t ind1)
{
uint32_t j;
if (_state != ST_STOP) {
return Converror::BAD_STATE;
}
if ((inp >= _ninp) || (out >= _nout)) {
return Converror::BAD_PARAM;
}
try {
for (j = 0; j < _nlevels; j++) {
_convlev[j]->impdata_write (inp, out, step, data, ind0, ind1, true);
}
} catch (...) {
cleanup ();
return Converror::MEM_ALLOC;
}
return 0;
}
int
Convproc::impdata_clear (uint32_t inp, uint32_t out)
{
uint32_t k;
if (_state < ST_STOP) {
return Converror::BAD_STATE;
}
for (k = 0; k < _nlevels; k++) {
_convlev[k]->impdata_clear (inp, out);
}
return 0;
}
int
Convproc::reset (void)
{
uint32_t k;
if (_state == ST_IDLE) {
return Converror::BAD_STATE;
}
for (k = 0; k < _ninp; k++) {
memset (_inpbuff[k], 0, _inpsize * sizeof (float));
}
for (k = 0; k < _nout; k++) {
memset (_outbuff[k], 0, _minpart * sizeof (float));
}
for (k = 0; k < _nlevels; k++) {
_convlev[k]->reset (_inpsize, _minpart, _inpbuff, _outbuff);
}
return 0;
}
int
Convproc::start_process (int abspri, int policy)
{
uint32_t k;
if (_state != ST_STOP) {
return Converror::BAD_STATE;
}
_latecnt = 0;
_inpoffs = 0;
_outoffs = 0;
reset ();
for (k = (_minpart == _quantum) ? 1 : 0; k < _nlevels; k++) {
_convlev[k]->start (abspri, policy);
}
while (!check_started ((_minpart == _quantum) ? 1 : 0)) {
#ifdef _MSC_VER
Sleep (40);
#else
usleep (40000);
#endif
sched_yield ();
}
_state = ST_PROC;
return 0;
}
int
Convproc::process ()
{
uint32_t k;
int f = 0;
if (_state != ST_PROC) {
return 0;
}
_inpoffs += _quantum;
if (_inpoffs == _inpsize) {
_inpoffs = 0;
}
_outoffs += _quantum;
if (_outoffs == _minpart) {
_outoffs = 0;
for (k = 0; k < _nout; k++) {
memset (_outbuff[k], 0, _minpart * sizeof (float));
}
for (k = 0; k < _nlevels; k++) {
f |= _convlev[k]->readout ();
}
if (f) {
if (++_latecnt >= 5) {
if (~_options & OPT_LATE_CONTIN) {
stop_process ();
}
f |= FL_LOAD;
}
} else {
_latecnt = 0;
}
}
return f;
}
int
Convproc::tailonly (uint32_t n_samples)
{
uint32_t k;
int f = 0;
if (_state != ST_PROC) {
return 0;
}
uint32_t outoffs = _outoffs;
outoffs += _quantum;
if (outoffs == _minpart) {
for (k = 0; k < _nout; k++) {
memset (_outbuff[k], 0, n_samples * sizeof (float));
}
for (k = 0; k < _nlevels; k++) {
f |= _convlev[k]->readtail (n_samples);
}
}
return f;
}
int
Convproc::stop_process (void)
{
uint32_t k;
if (_state != ST_PROC) {
return Converror::BAD_STATE;
}
for (k = 0; k < _nlevels; k++) {
_convlev[k]->stop ();
}
_state = ST_WAIT;
return 0;
}
int
Convproc::cleanup (void)
{
uint32_t k;
while (!check_stop ()) {
#ifdef _MSC_VER
Sleep (40);
#else
usleep (40000);
#endif
sched_yield ();
}
for (k = 0; k < _ninp; k++) {
delete[] _inpbuff[k];
_inpbuff[k] = 0;
}
for (k = 0; k < _nout; k++) {
delete[] _outbuff[k];
_outbuff[k] = 0;
}
for (k = 0; k < _nlevels; k++) {
delete _convlev[k];
_convlev[k] = 0;
}
_state = ST_IDLE;
_options = 0;
_ninp = 0;
_nout = 0;
_quantum = 0;
_minpart = 0;
_maxpart = 0;
_nlevels = 0;
_latecnt = 0;
return 0;
}
bool
Convproc::check_started (uint32_t k)
{
for (; (k < _nlevels) && (_convlev[k]->_stat == Convlevel::ST_PROC); k++) ;
return (k == _nlevels) ? true : false;
}
bool
Convproc::check_stop (void)
{
uint32_t k;
for (k = 0; (k < _nlevels) && (_convlev[k]->_stat == Convlevel::ST_IDLE); k++) ;
if (k == _nlevels) {
_state = ST_STOP;
return true;
}
return false;
}
void
Convproc::print (FILE* F)
{
uint32_t k;
for (k = 0; k < _nlevels; k++) {
_convlev[k]->print (F);
}
}
#ifdef ENABLE_VECTOR_MODE
typedef float FV4 __attribute__ ((vector_size (16)));
#endif
Convlevel::Convlevel (void)
: _stat (ST_IDLE)
, _npar (0)
, _parsize (0)
, _options (0)
#ifndef PTW32_VERSION
, _pthr (0)
#endif
, _inp_list (0)
, _out_list (0)
, _plan_r2c (0)
, _plan_c2r (0)
, _time_data (0)
, _prep_data (0)
, _freq_data (0)
{
}
Convlevel::~Convlevel (void)
{
cleanup ();
}
void
Convlevel::configure (int prio,
uint32_t offs,
uint32_t npar,
uint32_t parsize,
uint32_t options)
{
int fftwopt = (options & OPT_FFTW_MEASURE) ? FFTW_MEASURE : FFTW_ESTIMATE;
_prio = prio;
_offs = offs;
_npar = npar;
_parsize = parsize;
_options = options;
_time_data = calloc_real (2 * _parsize);
_prep_data = calloc_real (2 * _parsize);
_freq_data = calloc_complex (_parsize + 1);
_plan_r2c = fftwf_plan_dft_r2c_1d (2 * _parsize, _time_data, _freq_data, fftwopt);
_plan_c2r = fftwf_plan_dft_c2r_1d (2 * _parsize, _freq_data, _time_data, fftwopt);
if (_plan_r2c && _plan_c2r) {
return;
}
throw (Converror (Converror::MEM_ALLOC));
}
void
Convlevel::impdata_write (uint32_t inp,
uint32_t out,
int32_t step,
float* data,
int32_t i0,
int32_t i1,
bool create)
{
uint32_t k;
int32_t j, j0, j1, n;
float norm;
fftwf_complex* fftb;
Macnode* M;
n = i1 - i0;
i0 = _offs - i0;
i1 = i0 + _npar * _parsize;
if ((i0 >= n) || (i1 <= 0)) {
return;
}
if (create) {
M = findmacnode (inp, out, true);
if (M == 0 || M->_link) {
return;
}
if (M->_fftb == 0) {
M->alloc_fftb (_npar);
}
} else {
M = findmacnode (inp, out, false);
if (M == 0 || M->_link || M->_fftb == 0) {
return;
}
}
norm = 0.5f / _parsize;
for (k = 0; k < _npar; k++) {
i1 = i0 + _parsize;
if ((i0 < n) && (i1 > 0)) {
fftb = M->_fftb[k];
if (fftb == 0 && create) {
M->_fftb[k] = fftb = calloc_complex (_parsize + 1);
}
if (fftb && data) {
memset (_prep_data, 0, 2 * _parsize * sizeof (float));
j0 = (i0 < 0) ? 0 : i0;
j1 = (i1 > n) ? n : i1;
for (j = j0; j < j1; j++) {
_prep_data[j - i0] = norm * data[j * step];
}
fftwf_execute_dft_r2c (_plan_r2c, _prep_data, _freq_data);
#ifdef ENABLE_VECTOR_MODE
if (_options & OPT_VECTOR_MODE) {
fftswap (_freq_data);
}
#endif
for (j = 0; j <= (int)_parsize; j++) {
fftb[j][0] += _freq_data[j][0];
fftb[j][1] += _freq_data[j][1];
}
}
}
i0 = i1;
}
}
void
Convlevel::impdata_clear (uint32_t inp, uint32_t out)
{
uint32_t i;
Macnode* M;
M = findmacnode (inp, out, false);
if (M == 0 || M->_link || M->_fftb == 0) {
return;
}
for (i = 0; i < _npar; i++) {
if (M->_fftb[i]) {
memset (M->_fftb[i], 0, (_parsize + 1) * sizeof (fftwf_complex));
}
}
}
void
Convlevel::reset (uint32_t inpsize,
uint32_t outsize,
float** inpbuff,
float** outbuff)
{
uint32_t i;
Inpnode* X;
Outnode* Y;
_inpsize = inpsize;
_outsize = outsize;
_inpbuff = inpbuff;
_outbuff = outbuff;
for (X = _inp_list; X; X = X->_next) {
for (i = 0; i < _npar; i++) {
memset (X->_ffta[i], 0, (_parsize + 1) * sizeof (fftwf_complex));
}
}
for (Y = _out_list; Y; Y = Y->_next) {
for (i = 0; i < 3; i++) {
memset (Y->_buff[i], 0, _parsize * sizeof (float));
}
}
if (_parsize == _outsize) {
_outoffs = 0;
_inpoffs = 0;
} else {
_outoffs = _parsize / 2;
_inpoffs = _inpsize - _outoffs;
}
_bits = _parsize / _outsize;
_wait = 0;
_ptind = 0;
_opind = 0;
_trig.init (0, 0);
_done.init (0, 0);
}
void
Convlevel::start (int abspri, int policy)
{
int min, max;
pthread_attr_t attr;
struct sched_param parm;
#ifndef PTW32_VERSION
_pthr = 0;
#endif
min = sched_get_priority_min (policy);
max = sched_get_priority_max (policy);
abspri += _prio;
if (abspri > max) {
abspri = max;
}
if (abspri < min) {
abspri = min;
}
parm.sched_priority = abspri;
pthread_attr_init (&attr);
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
pthread_attr_setschedpolicy (&attr, policy);
pthread_attr_setschedparam (&attr, &parm);
pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED);
pthread_attr_setstacksize (&attr, 0x10000); // 64kB
pthread_create (&_pthr, &attr, static_main, this);
pthread_attr_destroy (&attr);
}
void
Convlevel::stop (void)
{
if (_stat != ST_IDLE) {
_stat = ST_TERM;
_trig.post ();
}
}
void
Convlevel::cleanup (void)
{
Inpnode *X, *X1;
Outnode *Y, *Y1;
Macnode *M, *M1;
X = _inp_list;
while (X) {
X1 = X->_next;
delete X;
X = X1;
}
_inp_list = 0;
Y = _out_list;
while (Y) {
M = Y->_list;
while (M) {
M1 = M->_next;
delete M;
M = M1;
}
Y1 = Y->_next;
delete Y;
Y = Y1;
}
_out_list = 0;
fftwf_destroy_plan (_plan_r2c);
fftwf_destroy_plan (_plan_c2r);
fftwf_free (_time_data);
fftwf_free (_prep_data);
fftwf_free (_freq_data);
_plan_r2c = 0;
_plan_c2r = 0;
_time_data = 0;
_prep_data = 0;
_freq_data = 0;
}
void*
Convlevel::static_main (void* arg)
{
((Convlevel*)arg)->main ();
#if !defined PTW32_VERSION && defined _GNU_SOURCE
pthread_setname_np (pthread_self(), "ZConvlevel");
#endif
return 0;
}
void
Convlevel::main (void)
{
_stat = ST_PROC;
while (true) {
_trig.wait ();
if (_stat == ST_TERM) {
_stat = ST_IDLE;
#ifndef PTW32_VERSION
_pthr = 0;
#endif
return;
}
process ();
_done.post ();
}
}
void
Convlevel::process ()
{
uint32_t i, i1, j, k, n1, n2, opi1, opi2;
Inpnode const* X;
Macnode const* M;
Outnode const* Y;
fftwf_complex* ffta;
fftwf_complex* fftb;
float* inpd;
float* outd;
i1 = _inpoffs;
n1 = _parsize;
n2 = 0;
_inpoffs = i1 + n1;
if (_inpoffs >= _inpsize) {
_inpoffs -= _inpsize;
n2 = _inpoffs;
n1 -= n2;
}
opi1 = (_opind + 1) % 3;
opi2 = (_opind + 2) % 3;
for (X = _inp_list; X; X = X->_next) {
inpd = _inpbuff[X->_inp];
if (n1) {
memcpy (_time_data, inpd + i1, n1 * sizeof (float));
}
if (n2) {
memcpy (_time_data + n1, inpd, n2 * sizeof (float));
}
memset (_time_data + _parsize, 0, _parsize * sizeof (float));
fftwf_execute_dft_r2c (_plan_r2c, _time_data, X->_ffta[_ptind]);
#ifdef ENABLE_VECTOR_MODE
if (_options & OPT_VECTOR_MODE) {
fftswap (X->_ffta[_ptind]);
}
#endif
}
for (Y = _out_list; Y; Y = Y->_next) {
memset (_freq_data, 0, (_parsize + 1) * sizeof (fftwf_complex));
for (M = Y->_list; M; M = M->_next) {
X = M->_inpn;
i = _ptind;
for (j = 0; j < _npar; j++) {
ffta = X->_ffta[i];
fftb = M->_link ? M->_link->_fftb[j] : M->_fftb[j];
if (fftb) {
#ifdef ENABLE_VECTOR_MODE
if (_options & OPT_VECTOR_MODE) {
FV4* A = (FV4*)ffta;
FV4* B = (FV4*)fftb;
FV4* D = (FV4*)_freq_data;
for (k = 0; k < _parsize; k += 4) {
D[0] += A[0] * B[0] - A[1] * B[1];
D[1] += A[0] * B[1] + A[1] * B[0];
A += 2;
B += 2;
D += 2;
}
_freq_data[_parsize][0] += ffta[_parsize][0] * fftb[_parsize][0];
_freq_data[_parsize][1] = 0;
} else
#endif
{
for (k = 0; k <= _parsize; k++) {
_freq_data[k][0] += ffta[k][0] * fftb[k][0] - ffta[k][1] * fftb[k][1];
_freq_data[k][1] += ffta[k][0] * fftb[k][1] + ffta[k][1] * fftb[k][0];
}
}
}
if (i == 0) {
i = _npar;
}
i--;
}
}
#ifdef ENABLE_VECTOR_MODE
if (_options & OPT_VECTOR_MODE) {
fftswap (_freq_data);
}
#endif
fftwf_execute_dft_c2r (_plan_c2r, _freq_data, _time_data);
outd = Y->_buff[opi1];
for (k = 0; k < _parsize; k++) {
outd[k] += _time_data[k];
}
outd = Y->_buff[opi2];
memcpy (outd, _time_data + _parsize, _parsize * sizeof (float));
}
_ptind++;
if (_ptind == _npar) {
_ptind = 0;
}
}
int
Convlevel::readout ()
{
uint32_t i;
float * p, *q;
Outnode const* Y;
_outoffs += _outsize;
if (_outoffs == _parsize) {
_outoffs = 0;
if (_stat == ST_PROC) {
while (_wait) {
_done.wait ();
_wait--;
}
if (++_opind == 3) {
_opind = 0;
}
_trig.post ();
_wait++;
} else {
process ();
if (++_opind == 3) {
_opind = 0;
}
}
}
for (Y = _out_list; Y; Y = Y->_next) {
p = Y->_buff[_opind] + _outoffs;
q = _outbuff[Y->_out];
for (i = 0; i < _outsize; i++) {
q[i] += p[i];
}
}
return (_wait > 1) ? _bits : 0;
}
int
Convlevel::readtail (uint32_t n_samples)
{
Outnode const* Y;
uint32_t opind = _opind;
uint32_t outoffs = _outoffs + _outsize;
if (outoffs == _parsize) {
while (_wait) {
_done.wait ();
_wait--;
}
outoffs = 0;
if (++opind == 3) {
opind = 0;
}
}
for (Y = _out_list; Y; Y = Y->_next) {
float const* const p = Y->_buff[opind] + outoffs;
float* const q = _outbuff[Y->_out];
for (uint32_t i = 0; i < n_samples; i++) {
q[i] += p[i];
}
}
return 0;
}
void
Convlevel::print (FILE* F)
{
fprintf (F, "prio = %4d, offs = %6d, parsize = %5d, npar = %3d\n", _prio, _offs, _parsize, _npar);
}
Macnode*
Convlevel::findmacnode (uint32_t inp, uint32_t out, bool create)
{
Inpnode* X;
Outnode* Y;
Macnode* M;
for (X = _inp_list; X && (X->_inp != inp); X = X->_next) {
;
}
if (!X) {
if (!create) {
return 0;
}
X = new Inpnode (inp);
X->_next = _inp_list;
_inp_list = X;
X->alloc_ffta (_npar, _parsize);
}
for (Y = _out_list; Y && (Y->_out != out); Y = Y->_next) {
;
}
if (!Y) {
if (!create) {
return 0;
}
Y = new Outnode (out, _parsize);
Y->_next = _out_list;
_out_list = Y;
}
for (M = Y->_list; M && (M->_inpn != X); M = M->_next) {
;
}
if (!M) {
if (!create) {
return 0;
}
M = new Macnode (X);
M->_next = Y->_list;
Y->_list = M;
}
return M;
}
#ifdef ENABLE_VECTOR_MODE
void
Convlevel::fftswap (fftwf_complex* p)
{
uint32_t n = _parsize;
float a, b;
while (n) {
a = p[2][0];
b = p[3][0];
p[2][0] = p[0][1];
p[3][0] = p[1][1];
p[0][1] = a;
p[1][1] = b;
p += 4;
n -= 4;
}
}
#endif
Inpnode::Inpnode (uint16_t inp)
: _next (0)
, _ffta (0)
, _npar (0)
, _inp (inp)
{
}
Inpnode::~Inpnode (void)
{
free_ffta ();
}
void
Inpnode::alloc_ffta (uint16_t npar, int32_t size)
{
_npar = npar;
_ffta = new fftwf_complex*[_npar];
for (int i = 0; i < _npar; i++) {
_ffta[i] = calloc_complex (size + 1);
}
}
void
Inpnode::free_ffta (void)
{
if (!_ffta) {
return;
}
for (uint16_t i = 0; i < _npar; i++) {
fftwf_free (_ffta[i]);
}
delete[] _ffta;
_ffta = 0;
_npar = 0;
}
Macnode::Macnode (Inpnode* inpn)
: _next (0)
, _inpn (inpn)
, _link (0)
, _fftb (0)
, _npar (0)
{
}
Macnode::~Macnode (void)
{
free_fftb ();
}
void
Macnode::alloc_fftb (uint16_t npar)
{
_npar = npar;
_fftb = new fftwf_complex*[_npar];
for (uint16_t i = 0; i < _npar; i++) {
_fftb[i] = 0;
}
}
void
Macnode::free_fftb (void)
{
if (!_fftb) {
return;
}
for (uint16_t i = 0; i < _npar; i++) {
fftwf_free (_fftb[i]);
}
delete[] _fftb;
_fftb = 0;
_npar = 0;
}
Outnode::Outnode (uint16_t out, int32_t size)
: _next (0)
, _list (0)
, _out (out)
{
_buff[0] = calloc_real (size);
_buff[1] = calloc_real (size);
_buff[2] = calloc_real (size);
}
Outnode::~Outnode (void)
{
fftwf_free (_buff[0]);
fftwf_free (_buff[1]);
fftwf_free (_buff[2]);
}
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