ref: 7bb5cefadf43c3695fbecfe6d1b03c48af9be132
dir: /src/temporal/resampler.c/
/* Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org> This file is part of aubio. aubio 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 3 of the License, or (at your option) any later version. aubio 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 aubio. If not, see <http://www.gnu.org/licenses/>. */ #include "config.h" #include "aubio_priv.h" #include "fvec.h" #include "temporal/resampler.h" #if HAVE_SAMPLERATE #include <samplerate.h> /* from libsamplerate */ struct _aubio_resampler_t { SRC_DATA *proc; SRC_STATE *stat; smpl_t ratio; uint_t type; }; aubio_resampler_t * new_aubio_resampler (smpl_t 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 */ if (error) { AUBIO_ERR ("Failed creating resampler: %s\n", src_strerror (error)); del_aubio_resampler(s); return NULL; } s->proc = AUBIO_NEW (SRC_DATA); s->ratio = ratio; return s; } void del_aubio_resampler (aubio_resampler_t * s) { if (s->stat) src_delete (s->stat); AUBIO_FREE (s->proc); AUBIO_FREE (s); } void aubio_resampler_do (aubio_resampler_t * s, fvec_t * input, fvec_t * output) { s->proc->input_frames = input->length; s->proc->output_frames = output->length; s->proc->src_ratio = (double) s->ratio; /* make SRC_PROC data point to input outputs */ s->proc->data_in = (float *) input->data; s->proc->data_out = (float *) output->data; /* do resampling */ src_process (s->stat, s->proc); } #else struct _aubio_resampler_t { }; aubio_resampler_t * new_aubio_resampler (smpl_t ratio UNUSED, uint_t type UNUSED) { AUBIO_ERR ("aubio was not compiled with libsamplerate\n"); return NULL; } void del_aubio_resampler (aubio_resampler_t * s UNUSED) { } void aubio_resampler_do (aubio_resampler_t * s UNUSED, fvec_t * input UNUSED, fvec_t * output UNUSED) { } #endif /* HAVE_SAMPLERATE */