ref: fcacd8893784a2e7d41a615be168b4f186d87368
dir: /src/temporal/resample.c/
/* Copyright (C) 2003 Paul Brossier This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <samplerate.h> /* from libsamplerate */ #include "aubio_priv.h" #include "fvec.h" #include "temporal/resample.h" struct _aubio_resampler_t { SRC_DATA *proc; SRC_STATE *stat; float ratio; uint_t type; }; aubio_resampler_t * new_aubio_resampler(float ratio, uint_t type) { aubio_resampler_t * s = AUBIO_NEW(aubio_resampler_t); int error = 0; s->stat = src_new (type, 1, &error) ; /* only one channel */ s->proc = AUBIO_NEW(SRC_DATA); if (error) AUBIO_ERR("%s\n",src_strerror(error)); s->ratio = ratio; return s; } void del_aubio_resampler(aubio_resampler_t *s) { src_delete(s->stat); AUBIO_FREE(s->proc); AUBIO_FREE(s); } uint_t aubio_resampler_process(aubio_resampler_t *s, fvec_t * input, fvec_t * output) { uint_t i ; s->proc->input_frames = input->length; s->proc->output_frames = output->length; s->proc->src_ratio = s->ratio; for (i = 0 ; i< input->channels; i++) { /* make SRC_PROC data point to input outputs */ s->proc->data_in = (float *)input->data[i]; s->proc->data_out= (float *)output->data[i]; /* do resampling */ src_process (s->stat, s->proc) ; } return AUBIO_OK; }