ref: fd9590f1d8ae17dade386fc3da91434b4f854afd
dir: /src/io/source_sndfile.c/
/*
Copyright (C) 2012 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/>.
*/
#include "aubio_priv.h"
#ifdef HAVE_SNDFILE
#include <sndfile.h>
#include "fvec.h"
#include "fmat.h"
#include "source_sndfile.h"
#include "temporal/resampler.h"
#define MAX_SIZE 4096
#define MAX_SAMPLES AUBIO_MAX_CHANNELS * MAX_SIZE
#if !HAVE_AUBIO_DOUBLE
#define aubio_sf_read_smpl sf_read_float
#else /* HAVE_AUBIO_DOUBLE */
#define aubio_sf_read_smpl sf_read_double
#endif /* HAVE_AUBIO_DOUBLE */
struct _aubio_source_sndfile_t {
uint_t hop_size;
uint_t samplerate;
uint_t channels;
// some data about the file
char_t *path;
SNDFILE *handle;
int input_samplerate;
int input_channels;
int input_format;
int duration;
// resampling stuff
smpl_t ratio;
uint_t input_hop_size;
#ifdef HAVE_SAMPLERATE
aubio_resampler_t **resamplers;
fvec_t *input_data;
fmat_t *input_mat;
#endif /* HAVE_SAMPLERATE */
// some temporary memory for sndfile to write at
uint_t scratch_size;
smpl_t *scratch_data;
};
aubio_source_sndfile_t * new_aubio_source_sndfile(const char_t * path, uint_t samplerate, uint_t hop_size) {
aubio_source_sndfile_t * s = AUBIO_NEW(aubio_source_sndfile_t);
SF_INFO sfinfo;
if (path == NULL) {
AUBIO_ERR("source_sndfile: Aborted opening null path\n");
goto beach;
}
if ((sint_t)samplerate < 0) {
AUBIO_ERR("source_sndfile: Can not open %s with samplerate %d\n", path, samplerate);
goto beach;
}
if ((sint_t)hop_size <= 0) {
AUBIO_ERR("source_sndfile: Can not open %s with hop_size %d\n", path, hop_size);
goto beach;
}
s->hop_size = hop_size;
s->channels = 1;
if (s->path) AUBIO_FREE(s->path);
s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
// try opening the file, getting the info in sfinfo
AUBIO_MEMSET(&sfinfo, 0, sizeof (sfinfo));
s->handle = sf_open (s->path, SFM_READ, &sfinfo);
if (s->handle == NULL) {
/* show libsndfile err msg */
AUBIO_ERR("source_sndfile: Failed opening %s (%s)\n", s->path,
sf_strerror (NULL));
goto beach;
}
/* get input specs */
s->input_samplerate = sfinfo.samplerate;
s->input_channels = sfinfo.channels;
s->input_format = sfinfo.format;
s->duration = sfinfo.frames;
if (samplerate == 0) {
s->samplerate = s->input_samplerate;
//AUBIO_DBG("sampling rate set to 0, automagically adjusting to %d\n", samplerate);
} else {
s->samplerate = samplerate;
}
/* compute input block size required before resampling */
s->ratio = s->samplerate/(smpl_t)s->input_samplerate;
s->input_hop_size = (uint_t)FLOOR(s->hop_size / s->ratio + .5);
if (s->input_hop_size * s->input_channels > MAX_SAMPLES) {
AUBIO_ERR("source_sndfile: Not able to process more than %d frames of %d channels\n",
MAX_SAMPLES / s->input_channels, s->input_channels);
goto beach;
}
#ifdef HAVE_SAMPLERATE
s->input_data = NULL;
s->input_mat = NULL;
s->resamplers = NULL;
if (s->ratio != 1) {
uint_t i;
s->resamplers = AUBIO_ARRAY(aubio_resampler_t*, s->input_channels);
s->input_data = new_fvec(s->input_hop_size);
s->input_mat = new_fmat(s->input_channels, s->input_hop_size);
for (i = 0; i < (uint_t)s->input_channels; i++) {
s->resamplers[i] = new_aubio_resampler(s->ratio, 4);
}
if (s->ratio > 1) {
// we would need to add a ring buffer for these
if ( (uint_t)FLOOR(s->input_hop_size * s->ratio + .5) != s->hop_size ) {
AUBIO_ERR("source_sndfile: can not upsample %s from %d to %d\n", s->path,
s->input_samplerate, s->samplerate);
goto beach;
}
AUBIO_WRN("source_sndfile: upsampling %s from %d to %d\n", s->path,
s->input_samplerate, s->samplerate);
}
s->duration = (uint_t)FLOOR(s->duration * s->ratio);
}
#else
if (s->ratio != 1) {
AUBIO_ERR("source_sndfile: aubio was compiled without aubio_resampler\n");
goto beach;
}
#endif /* HAVE_SAMPLERATE */
/* allocate data for de/interleaving reallocated when needed. */
s->scratch_size = s->input_hop_size * s->input_channels;
s->scratch_data = AUBIO_ARRAY(smpl_t, s->scratch_size);
return s;
beach:
//AUBIO_ERR("can not read %s at samplerate %dHz with a hop_size of %d\n",
// s->path, s->samplerate, s->hop_size);
del_aubio_source_sndfile(s);
return NULL;
}
void aubio_source_sndfile_do(aubio_source_sndfile_t * s, fvec_t * read_data, uint_t * read){
uint_t i,j, input_channels = s->input_channels;
/* read from file into scratch_data */
sf_count_t read_samples = aubio_sf_read_smpl (s->handle, s->scratch_data, s->scratch_size);
/* where to store de-interleaved data */
smpl_t *ptr_data;
#ifdef HAVE_SAMPLERATE
if (s->ratio != 1) {
ptr_data = s->input_data->data;
} else
#endif /* HAVE_SAMPLERATE */
{
ptr_data = read_data->data;
}
/* de-interleaving and down-mixing data */
for (j = 0; j < read_samples / input_channels; j++) {
ptr_data[j] = 0;
for (i = 0; i < input_channels; i++) {
ptr_data[j] += s->scratch_data[input_channels*j+i];
}
ptr_data[j] /= (smpl_t)input_channels;
}
#ifdef HAVE_SAMPLERATE
if (s->resamplers) {
aubio_resampler_do(s->resamplers[0], s->input_data, read_data);
}
#endif /* HAVE_SAMPLERATE */
*read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
if (*read < s->hop_size) {
for (j = *read; j < s->hop_size; j++) {
read_data->data[j] = 0;
}
}
}
void aubio_source_sndfile_do_multi(aubio_source_sndfile_t * s, fmat_t * read_data, uint_t * read){
uint_t i,j, input_channels = s->input_channels;
/* do actual reading */
sf_count_t read_samples = aubio_sf_read_smpl (s->handle, s->scratch_data, s->scratch_size);
/* where to store de-interleaved data */
smpl_t **ptr_data;
#ifdef HAVE_SAMPLERATE
if (s->ratio != 1) {
ptr_data = s->input_mat->data;
} else
#endif /* HAVE_SAMPLERATE */
{
ptr_data = read_data->data;
}
if (read_data->height < input_channels) {
// destination matrix has less channels than the file; copy only first
// channels of the file, de-interleaving data
for (j = 0; j < read_samples / input_channels; j++) {
for (i = 0; i < read_data->height; i++) {
ptr_data[i][j] = s->scratch_data[j * input_channels + i];
}
}
} else {
// destination matrix has as many or more channels than the file; copy each
// channel from the file to the destination matrix, de-interleaving data
for (j = 0; j < read_samples / input_channels; j++) {
for (i = 0; i < input_channels; i++) {
ptr_data[i][j] = s->scratch_data[j * input_channels + i];
}
}
}
if (read_data->height > input_channels) {
// destination matrix has more channels than the file; copy last channel
// of the file to each additional channels, de-interleaving data
for (j = 0; j < read_samples / input_channels; j++) {
for (i = input_channels; i < read_data->height; i++) {
ptr_data[i][j] = s->scratch_data[j * input_channels + (input_channels - 1)];
}
}
}
#ifdef HAVE_SAMPLERATE
if (s->resamplers) {
for (i = 0; i < input_channels; i++) {
fvec_t input_chan, read_chan;
input_chan.data = s->input_mat->data[i];
input_chan.length = s->input_mat->length;
read_chan.data = read_data->data[i];
read_chan.length = read_data->length;
aubio_resampler_do(s->resamplers[i], &input_chan, &read_chan);
}
}
#endif /* HAVE_SAMPLERATE */
*read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
if (*read < s->hop_size) {
for (i = 0; i < read_data->height; i++) {
for (j = *read; j < s->hop_size; j++) {
read_data->data[i][j] = 0.;
}
}
}
}
uint_t aubio_source_sndfile_get_samplerate(aubio_source_sndfile_t * s) {
return s->samplerate;
}
uint_t aubio_source_sndfile_get_channels(aubio_source_sndfile_t * s) {
return s->input_channels;
}
uint_t aubio_source_sndfile_get_duration (const aubio_source_sndfile_t * s) {
if (s && s->duration) {
return s->duration;
}
return 0;
}
uint_t aubio_source_sndfile_seek (aubio_source_sndfile_t * s, uint_t pos) {
uint_t resampled_pos = (uint_t)ROUND(pos / s->ratio);
sf_count_t sf_ret = sf_seek (s->handle, resampled_pos, SEEK_SET);
if (sf_ret == -1) {
AUBIO_ERR("source_sndfile: Failed seeking %s at %d: %s\n", s->path, pos, sf_strerror (NULL));
return AUBIO_FAIL;
}
if (sf_ret != resampled_pos) {
AUBIO_ERR("source_sndfile: Tried seeking %s at %d, but got %d: %s\n",
s->path, resampled_pos, (uint_t)sf_ret, sf_strerror (NULL));
return AUBIO_FAIL;
}
return AUBIO_OK;
}
uint_t aubio_source_sndfile_close (aubio_source_sndfile_t *s) {
if (!s->handle) {
return AUBIO_FAIL;
}
if(sf_close(s->handle)) {
AUBIO_ERR("source_sndfile: Error closing file %s: %s\n", s->path, sf_strerror (NULL));
return AUBIO_FAIL;
}
s->handle = NULL;
return AUBIO_OK;
}
void del_aubio_source_sndfile(aubio_source_sndfile_t * s){
if (!s) return;
aubio_source_sndfile_close(s);
#ifdef HAVE_SAMPLERATE
if (s->resamplers != NULL) {
uint_t i = 0, input_channels = s->input_channels;
for (i = 0; i < input_channels; i ++) {
if (s->resamplers[i] != NULL) {
del_aubio_resampler(s->resamplers[i]);
}
}
AUBIO_FREE(s->resamplers);
}
if (s->input_data) {
del_fvec(s->input_data);
}
if (s->input_mat) {
del_fmat(s->input_mat);
}
#endif /* HAVE_SAMPLERATE */
if (s->path) AUBIO_FREE(s->path);
AUBIO_FREE(s->scratch_data);
AUBIO_FREE(s);
}
#endif /* HAVE_SNDFILE */