2 Copyright (C) 2012 Paul Brossier <piem@aubio.org>
4 This file is part of aubio.
6 aubio is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 aubio is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with aubio. If not, see <http://www.gnu.org/licenses/>.
28 #include "aubio_priv.h"
29 #include "source_sndfile.h"
32 #include "temporal/resampler.h"
34 #define MAX_CHANNELS 6
36 #define MAX_SAMPLES MAX_CHANNELS * MAX_SIZE
38 struct _aubio_source_sndfile_t {
43 // some data about the file
52 uint_t input_hop_size;
53 #ifdef HAVE_SAMPLERATE
54 aubio_resampler_t *resampler;
56 #endif /* HAVE_SAMPLERATE */
58 // some temporary memory for sndfile to write at
63 aubio_source_sndfile_t * new_aubio_source_sndfile(char_t * path, uint_t samplerate, uint_t hop_size) {
64 aubio_source_sndfile_t * s = AUBIO_NEW(aubio_source_sndfile_t);
67 AUBIO_ERR("Aborted opening null path\n");
71 s->hop_size = hop_size;
75 // try opening the file, geting the info in sfinfo
77 AUBIO_MEMSET(&sfinfo, 0, sizeof (sfinfo));
78 s->handle = sf_open (s->path, SFM_READ, &sfinfo);
80 if (s->handle == NULL) {
81 /* show libsndfile err msg */
82 AUBIO_ERR("Failed opening %s: %s\n", s->path, sf_strerror (NULL));
87 s->input_samplerate = sfinfo.samplerate;
88 s->input_channels = sfinfo.channels;
89 s->input_format = sfinfo.format;
91 if (samplerate == 0) {
92 samplerate = s->input_samplerate;
93 AUBIO_WRN("sampling rate set to 0, automagically adjusting to %d", samplerate);
95 s->samplerate = samplerate;
96 /* compute input block size required before resampling */
97 s->ratio = s->samplerate/(float)s->input_samplerate;
98 s->input_hop_size = (uint_t)FLOOR(s->hop_size / s->ratio + .5);
100 if (s->input_hop_size * s->input_channels > MAX_SAMPLES) {
101 AUBIO_ERR("Not able to process more than %d frames of %d channels\n",
102 MAX_SAMPLES / s->input_channels, s->input_channels);
106 #ifdef HAVE_SAMPLERATE
108 s->input_data = NULL;
110 s->input_data = new_fvec(s->input_hop_size);
111 s->resampler = new_aubio_resampler(s->ratio, 4);
113 // we would need to add a ring buffer for these
114 if ( (uint_t)(s->input_hop_size * s->ratio + .5) != s->hop_size ) {
115 AUBIO_ERR("can not upsample from %d to %d\n", s->input_samplerate, s->samplerate);
118 AUBIO_WRN("upsampling %s from %d to % d\n", s->path, s->input_samplerate, s->samplerate);
123 AUBIO_ERR("aubio was compiled without aubio_resampler\n");
126 #endif /* HAVE_SAMPLERATE */
128 /* allocate data for de/interleaving reallocated when needed. */
129 s->scratch_size = s->input_hop_size * s->input_channels;
130 s->scratch_data = AUBIO_ARRAY(float,s->scratch_size);
135 AUBIO_ERR("can not read %s at samplerate %dHz with a hop_size of %d\n",
136 s->path, s->samplerate, s->hop_size);
137 del_aubio_source_sndfile(s);
141 void aubio_source_sndfile_do(aubio_source_sndfile_t * s, fvec_t * read_data, uint_t * read){
142 uint_t i,j, input_channels = s->input_channels;
143 /* do actual reading */
144 sf_count_t read_samples = sf_read_float (s->handle, s->scratch_data, s->scratch_size);
148 #ifdef HAVE_SAMPLERATE
150 data = s->input_data->data;
152 #endif /* HAVE_SAMPLERATE */
154 data = read_data->data;
157 /* de-interleaving and down-mixing data */
158 for (j = 0; j < read_samples / input_channels; j++) {
160 for (i = 0; i < input_channels; i++) {
161 data[j] += (smpl_t)s->scratch_data[input_channels*j+i];
163 data[j] /= (smpl_t)input_channels;
166 #ifdef HAVE_SAMPLERATE
168 aubio_resampler_do(s->resampler, s->input_data, read_data);
170 #endif /* HAVE_SAMPLERATE */
172 *read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
175 void del_aubio_source_sndfile(aubio_source_sndfile_t * s){
177 if (sf_close(s->handle)) {
178 AUBIO_ERR("Error closing file %s: %s", s->path, sf_strerror (NULL));
180 #ifdef HAVE_SAMPLERATE
181 if (s->resampler != NULL) {
182 del_aubio_resampler(s->resampler);
185 del_fvec(s->input_data);
187 #endif /* HAVE_SAMPLERATE */
188 AUBIO_FREE(s->scratch_data);
192 uint_t aubio_source_sndfile_get_samplerate(aubio_source_sndfile_t * s) {
193 return s->samplerate;
196 #endif /* HAVE_SNDFILE */