ref: d88041a900fc2170e2295bfad097839dee9128d7
dir: /src/spectral/dct.c/
/*
Copyright (C) 2018 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio 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.
aubio 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 aubio. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
Discrete Cosine Transform
Functions aubio_dct_do() and aubio_dct_rdo() are equivalent to MATLAB/Octave
dct() and idct() functions, as well as scipy.fftpack.dct(x, norm='ortho') and
scipy.fftpack.idct(x, norm='ortho')
\example spectral/test-dct.c
*/
#include "aubio_priv.h"
#include "fvec.h"
#include "spectral/dct.h"
// function pointers prototypes
typedef void (*aubio_dct_do_t)(aubio_dct_t * s, const fvec_t * input, fvec_t * output);
typedef void (*aubio_dct_rdo_t)(aubio_dct_t * s, const fvec_t * input, fvec_t * output);
typedef void (*del_aubio_dct_t)(aubio_dct_t * s);
#if defined(HAVE_ACCELERATE)
typedef struct _aubio_dct_accelerate_t aubio_dct_accelerate_t;
extern aubio_dct_accelerate_t * new_aubio_dct_accelerate (uint_t size);
extern void aubio_dct_accelerate_do(aubio_dct_accelerate_t *s, const fvec_t *input, fvec_t *output);
extern void aubio_dct_accelerate_rdo(aubio_dct_accelerate_t *s, const fvec_t *input, fvec_t *output);
extern void del_aubio_dct_accelerate (aubio_dct_accelerate_t *s);
#elif defined(HAVE_FFTW3)
typedef struct _aubio_dct_fftw_t aubio_dct_fftw_t;
extern aubio_dct_fftw_t * new_aubio_dct_fftw (uint_t size);
extern void aubio_dct_fftw_do(aubio_dct_fftw_t *s, const fvec_t *input, fvec_t *output);
extern void aubio_dct_fftw_rdo(aubio_dct_fftw_t *s, const fvec_t *input, fvec_t *output);
extern void del_aubio_dct_fftw (aubio_dct_fftw_t *s);
#elif defined(HAVE_INTEL_IPP)
typedef struct _aubio_dct_ipp_t aubio_dct_ipp_t;
extern aubio_dct_ipp_t * new_aubio_dct_ipp (uint_t size);
extern void aubio_dct_ipp_do(aubio_dct_ipp_t *s, const fvec_t *input, fvec_t *output);
extern void aubio_dct_ipp_rdo(aubio_dct_ipp_t *s, const fvec_t *input, fvec_t *output);
extern void del_aubio_dct_ipp (aubio_dct_ipp_t *s);
#else
typedef struct _aubio_dct_ooura_t aubio_dct_ooura_t;
extern aubio_dct_ooura_t * new_aubio_dct_ooura (uint_t size);
extern void aubio_dct_ooura_do(aubio_dct_ooura_t *s, const fvec_t *input, fvec_t *output);
extern void aubio_dct_ooura_rdo(aubio_dct_ooura_t *s, const fvec_t *input, fvec_t *output);
extern void del_aubio_dct_ooura (aubio_dct_ooura_t *s);
#endif
// plain mode
typedef struct _aubio_dct_plain_t aubio_dct_plain_t;
extern aubio_dct_plain_t * new_aubio_dct_plain (uint_t size);
extern void aubio_dct_plain_do(aubio_dct_plain_t *s, const fvec_t *input, fvec_t *output);
extern void aubio_dct_plain_rdo(aubio_dct_plain_t *s, const fvec_t *input, fvec_t *output);
extern void del_aubio_dct_plain (aubio_dct_plain_t *s);
struct _aubio_dct_t {
void *dct;
aubio_dct_do_t dct_do;
aubio_dct_rdo_t dct_rdo;
del_aubio_dct_t del_dct;
};
aubio_dct_t* new_aubio_dct (uint_t size) {
aubio_dct_t * s = AUBIO_NEW(aubio_dct_t);
#if defined(HAVE_ACCELERATE)
// vDSP supports sizes = f * 2 ** n, where n >= 4 and f in [1, 3, 5, 15]
// see https://developer.apple.com/documentation/accelerate/1449930-vdsp_dct_createsetup
{
uint_t radix = size;
uint_t order = 0;
while ((radix >= 1) && ((radix / 2) * 2 == radix)) {
radix /= 2;
order++;
}
if (order < 4 || (radix != 1 && radix != 3 && radix != 5 && radix != 15)) {
goto plain;
}
}
s->dct = (void *)new_aubio_dct_accelerate (size);
if (s->dct) {
s->dct_do = (aubio_dct_do_t)aubio_dct_accelerate_do;
s->dct_rdo = (aubio_dct_rdo_t)aubio_dct_accelerate_rdo;
s->del_dct = (del_aubio_dct_t)del_aubio_dct_accelerate;
return s;
}
#elif defined(HAVE_FFTW3)
// fftw supports any positive integer size
s->dct = (void *)new_aubio_dct_fftw (size);
if (s->dct) {
s->dct_do = (aubio_dct_do_t)aubio_dct_fftw_do;
s->dct_rdo = (aubio_dct_rdo_t)aubio_dct_fftw_rdo;
s->del_dct = (del_aubio_dct_t)del_aubio_dct_fftw;
return s;
} else {
AUBIO_WRN("dct: unexpected error while creating dct_fftw with size %d\n",
size);
goto plain;
}
#elif defined(HAVE_INTEL_IPP)
// unclear from the docs, but intel ipp seems to support any size
s->dct = (void *)new_aubio_dct_ipp (size);
if (s->dct) {
s->dct_do = (aubio_dct_do_t)aubio_dct_ipp_do;
s->dct_rdo = (aubio_dct_rdo_t)aubio_dct_ipp_rdo;
s->del_dct = (del_aubio_dct_t)del_aubio_dct_ipp;
return s;
} else {
AUBIO_WRN("dct: unexpected error while creating dct_ipp with size %d\n",
size);
goto plain;
}
#else
// ooura support sizes that are power of 2
if (aubio_is_power_of_two(size) != 1 || size == 1) {
goto plain;
}
s->dct = (void *)new_aubio_dct_ooura (size);
if (s->dct) {
s->dct_do = (aubio_dct_do_t)aubio_dct_ooura_do;
s->dct_rdo = (aubio_dct_rdo_t)aubio_dct_ooura_rdo;
s->del_dct = (del_aubio_dct_t)del_aubio_dct_ooura;
return s;
}
#endif
// falling back to plain mode
AUBIO_WRN("dct: no optimised implementation could be created for size %d\n",
size);
plain:
s->dct = (void *)new_aubio_dct_plain (size);
if (s->dct) {
s->dct_do = (aubio_dct_do_t)aubio_dct_plain_do;
s->dct_rdo = (aubio_dct_rdo_t)aubio_dct_plain_rdo;
s->del_dct = (del_aubio_dct_t)del_aubio_dct_plain;
return s;
} else {
goto beach;
}
beach:
AUBIO_ERROR("dct: failed creating with size %d, should be > 0\n", size);
del_aubio_dct(s);
return NULL;
}
void del_aubio_dct(aubio_dct_t *s) {
if (s->dct && s->del_dct) s->del_dct (s->dct);
AUBIO_FREE (s);
}
void aubio_dct_do(aubio_dct_t *s, const fvec_t *input, fvec_t *output) {
s->dct_do ((void *)s->dct, input, output);
}
void aubio_dct_rdo(aubio_dct_t *s, const fvec_t *input, fvec_t *output) {
s->dct_rdo ((void *)s->dct, input, output);
}