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;
72 s->samplerate = samplerate;
76 // try opening the file, geting the info in sfinfo
78 AUBIO_MEMSET(&sfinfo, 0, sizeof (sfinfo));
79 s->handle = sf_open (s->path, SFM_READ, &sfinfo);
81 if (s->handle == NULL) {
82 /* show libsndfile err msg */
83 AUBIO_ERR("Failed opening %s: %s\n", s->path, sf_strerror (NULL));
88 s->input_samplerate = sfinfo.samplerate;
89 s->input_channels = sfinfo.channels;
90 s->input_format = sfinfo.format;
92 /* compute input block size required before resampling */
93 s->ratio = s->samplerate/(float)s->input_samplerate;
94 s->input_hop_size = (uint_t)FLOOR(s->hop_size / s->ratio + .5);
96 if (s->input_hop_size * s->input_channels > MAX_SAMPLES) {
97 AUBIO_ERR("Not able to process more than %d frames of %d channels\n",
98 MAX_SAMPLES / s->input_channels, s->input_channels);
102 #ifdef HAVE_SAMPLERATE
104 s->input_data = NULL;
106 s->input_data = new_fvec(s->input_hop_size);
107 s->resampler = new_aubio_resampler(s->ratio, 4);
109 // we would need to add a ring buffer for these
110 if ( (uint_t)(s->input_hop_size * s->ratio + .5) != s->hop_size ) {
111 AUBIO_ERR("can not upsample from %d to %d\n", s->input_samplerate, s->samplerate);
114 AUBIO_WRN("upsampling %s from %d to % d\n", s->path, s->input_samplerate, s->samplerate);
119 AUBIO_ERR("aubio was compiled without aubio_resampler\n");
122 #endif /* HAVE_SAMPLERATE */
124 /* allocate data for de/interleaving reallocated when needed. */
125 s->scratch_size = s->input_hop_size * s->input_channels;
126 s->scratch_data = AUBIO_ARRAY(float,s->scratch_size);
131 AUBIO_ERR("can not read %s at samplerate %dHz with a hop_size of %d\n",
132 s->path, s->samplerate, s->hop_size);
133 del_aubio_source_sndfile(s);
137 void aubio_source_sndfile_do(aubio_source_sndfile_t * s, fvec_t * read_data, uint_t * read){
138 uint_t i,j, input_channels = s->input_channels;
139 /* do actual reading */
140 sf_count_t read_samples = sf_read_float (s->handle, s->scratch_data, s->scratch_size);
144 #ifdef HAVE_SAMPLERATE
146 data = s->input_data->data;
148 #endif /* HAVE_SAMPLERATE */
150 data = read_data->data;
153 /* de-interleaving and down-mixing data */
154 for (j = 0; j < read_samples / input_channels; j++) {
156 for (i = 0; i < input_channels; i++) {
157 data[j] += (smpl_t)s->scratch_data[input_channels*j+i];
159 data[j] /= (smpl_t)input_channels;
162 #ifdef HAVE_SAMPLERATE
164 aubio_resampler_do(s->resampler, s->input_data, read_data);
166 #endif /* HAVE_SAMPLERATE */
168 *read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
171 void del_aubio_source_sndfile(aubio_source_sndfile_t * s){
173 if (sf_close(s->handle)) {
174 AUBIO_ERR("Error closing file %s: %s", s->path, sf_strerror (NULL));
176 #ifdef HAVE_SAMPLERATE
177 if (s->resampler != NULL) {
178 del_aubio_resampler(s->resampler);
181 del_fvec(s->input_data);
183 #endif /* HAVE_SAMPLERATE */
184 AUBIO_FREE(s->scratch_data);
188 #endif /* HAVE_SNDFILE */