source: src/temporal/resample.c @ f11d78d

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since f11d78d was b093845, checked in by Paul Brossier <piem@piem.org>, 15 years ago

src/temporal/resample.c: add flags

  • Property mode set to 100644
File size: 1.9 KB
Line 
1/*
2         Copyright (C) 2003 Paul Brossier
3
4         This program is free software; you can redistribute it and/or modify
5         it under the terms of the GNU General Public License as published by
6         the Free Software Foundation; either version 2 of the License, or
7         (at your option) any later version.
8
9         This program is distributed in the hope that it will be useful,
10         but WITHOUT ANY WARRANTY; without even the implied warranty of
11         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12         GNU General Public License for more details.
13
14         You should have received a copy of the GNU General Public License
15         along with this program; if not, write to the Free Software
16         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17         
18*/
19
20#if HAVE_SAMPLERATE
21
22#include <samplerate.h> /* from libsamplerate */
23
24#include "aubio_priv.h"
25#include "fvec.h"
26#include "temporal/resample.h"
27
28struct _aubio_resampler_t {
29        SRC_DATA  *proc;
30        SRC_STATE *stat;
31        float ratio;
32        uint_t type;
33};
34
35aubio_resampler_t * new_aubio_resampler(float ratio, uint_t type) {
36        aubio_resampler_t * s  = AUBIO_NEW(aubio_resampler_t);
37        int error = 0;
38        s->stat = src_new (type, 1, &error) ; /* only one channel */
39        s->proc = AUBIO_NEW(SRC_DATA);
40        if (error) AUBIO_ERR("%s\n",src_strerror(error));
41        s->ratio = ratio;
42        return s;
43}
44
45void del_aubio_resampler(aubio_resampler_t *s) {
46        src_delete(s->stat);
47        AUBIO_FREE(s->proc);
48        AUBIO_FREE(s);
49}
50
51uint_t aubio_resampler_process(aubio_resampler_t *s, 
52    fvec_t * input,  fvec_t * output) {
53        uint_t i ;
54        s->proc->input_frames = input->length;
55        s->proc->output_frames = output->length;
56        s->proc->src_ratio = s->ratio;
57        for (i = 0 ; i< input->channels; i++) 
58        {
59                /* make SRC_PROC data point to input outputs */
60                s->proc->data_in = (float *)input->data[i];
61                s->proc->data_out= (float *)output->data[i];
62                /* do resampling */
63                src_process (s->stat, s->proc) ;
64        }
65        return AUBIO_OK;
66}       
67
68#endif /* HAVE_SAMPLERATE */
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