source: src/temporal/resampler.c @ e6a78ea

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since e6a78ea was e6a78ea, checked in by Paul Brossier <piem@piem.org>, 15 years ago

src: update all headers to GPLv3

  • Property mode set to 100644
File size: 1.9 KB
Line 
1/*
2  Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
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.
10
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.
15
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/>.
18
19*/
20
21#include "config.h"
22
23#if HAVE_SAMPLERATE
24
25#include <samplerate.h> /* from libsamplerate */
26
27#include "aubio_priv.h"
28#include "fvec.h"
29#include "temporal/resampler.h"
30
31struct _aubio_resampler_t {
32        SRC_DATA  *proc;
33        SRC_STATE *stat;
34        smpl_t ratio;
35        uint_t type;
36};
37
38aubio_resampler_t * new_aubio_resampler(smpl_t ratio, uint_t type) {
39        aubio_resampler_t * s  = AUBIO_NEW(aubio_resampler_t);
40        int error = 0;
41        s->stat = src_new (type, 1, &error) ; /* only one channel */
42        s->proc = AUBIO_NEW(SRC_DATA);
43        if (error) AUBIO_ERR("%s\n",src_strerror(error));
44        s->ratio = ratio;
45        return s;
46}
47
48void del_aubio_resampler(aubio_resampler_t *s) {
49        src_delete(s->stat);
50        AUBIO_FREE(s->proc);
51        AUBIO_FREE(s);
52}
53
54void aubio_resampler_do (aubio_resampler_t *s, 
55    fvec_t * input,  fvec_t * output) {
56        uint_t i ;
57        s->proc->input_frames = input->length;
58        s->proc->output_frames = output->length;
59        s->proc->src_ratio = (double)s->ratio;
60        for (i = 0 ; i< input->channels; i++) 
61        {
62                /* make SRC_PROC data point to input outputs */
63                s->proc->data_in = (float *)input->data[i];
64                s->proc->data_out= (float *)output->data[i];
65                /* do resampling */
66                src_process (s->stat, s->proc) ;
67        }
68}       
69
70#endif /* HAVE_SAMPLERATE */
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