source: src/resample.c @ 96fb8ad

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 96fb8ad was 96fb8ad, checked in by Paul Brossier <piem@altern.org>, 19 years ago

import 0.1.7.1

  • Property mode set to 100644
File size: 1.8 KB
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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
21#include <samplerate.h> /* from libsamplerate */
22
23#include "aubio_priv.h"
24#include "sample.h"
25#include "resample.h"
26
27struct _aubio_resampler_t {
28        SRC_DATA        *proc;
29        SRC_STATE *stat;
30        float ratio;
31        uint_t type;
32};
33
34aubio_resampler_t * new_aubio_resampler(float ratio, uint_t type) {
35        aubio_resampler_t * s  = AUBIO_NEW(aubio_resampler_t);
36        uint_t error = 0;
37        s->stat = src_new (type, 1, (uint_t*)error) ; /* only one channel */
38        s->proc = AUBIO_NEW(SRC_DATA);
39        if (error) AUBIO_ERR("%s\n",src_strerror(error));
40        s->ratio = ratio;
41        return s;
42}
43
44void del_aubio_resampler(aubio_resampler_t *s) {
45        src_delete(s->stat);
46        AUBIO_FREE(s);
47}
48
49uint_t aubio_resampler_process(aubio_resampler_t *s, 
50    fvec_t * input,  fvec_t * output) {
51        uint_t i ;
52        s->proc->input_frames = input->length;
53        s->proc->output_frames = output->length;
54        s->proc->src_ratio = s->ratio;
55        for (i = 0 ; i< input->channels; i++) 
56        {
57                /* make SRC_PROC data point to input outputs */
58                s->proc->data_in = input->data[i];
59                s->proc->data_out= output->data[i];
60                /* do resampling */
61                src_process (s->stat, s->proc) ;
62        }
63        return AUBIO_OK;
64}       
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