ref: bea5389eb36c37d99fd6cdaf1a4a80c5a03ca4d5
dir: /src/synth/sampler.c/
/* Copyright (C) 2003-2013 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 "fmat.h" #include "io/source.h" #include "synth/sampler.h" struct _aubio_sampler_t { uint_t samplerate; uint_t blocksize; aubio_source_t *source; fvec_t *source_output; fmat_t *source_output_multi; char_t *uri; uint_t playing; }; aubio_sampler_t *new_aubio_sampler(uint_t samplerate, uint_t blocksize) { aubio_sampler_t *s = AUBIO_NEW(aubio_sampler_t); s->samplerate = samplerate; s->blocksize = blocksize; s->source_output = new_fvec(blocksize); s->source_output_multi = new_fmat(blocksize, 4); s->source = NULL; s->playing = 0; return s; } uint_t aubio_sampler_load( aubio_sampler_t * o, char_t * uri ) { if (o->source) del_aubio_source(o->source); o->uri = uri; o->source = new_aubio_source(uri, o->samplerate, o->blocksize); if (o->source) return 0; AUBIO_ERR("sampler: failed loading %s", uri); return 1; } void aubio_sampler_do ( aubio_sampler_t * o, fvec_t * input, fvec_t * output) { uint_t read = 0, i; if (o->playing) { aubio_source_do (o->source, o->source_output, &read); for (i = 0; i < output->length; i++) { output->data[i] += o->source_output->data[i]; } if (read < o->blocksize) o->playing = 0; } if (input && input != output) { for (i = 0; i < output->length; i++) { output->data[i] += input->data[i]; } } } void aubio_sampler_do_multi ( aubio_sampler_t * o, fmat_t * input, fmat_t * output) { uint_t read = 0, i, j; if (o->playing) { aubio_source_do_multi (o->source, o->source_output_multi, &read); for (i = 0; i < output->height; i++) { for (j = 0; j < output->length; j++) { output->data[i][j] = o->source_output_multi->data[i][j]; } } if (read == 0) o->playing = 0; } if (input && input != output) { for (i = 0; i < output->height; i++) { for (j = 0; j < output->length; j++) { output->data[i][j] += input->data[i][j]; } } } } uint_t aubio_sampler_get_playing ( aubio_sampler_t * o ) { return o->playing; } uint_t aubio_sampler_set_playing ( aubio_sampler_t * o, uint_t playing ) { o->playing = (playing == 1) ? 1 : 0; return 0; } uint_t aubio_sampler_play ( aubio_sampler_t * o ) { aubio_source_seek (o->source, 0); return aubio_sampler_set_playing (o, 1); } uint_t aubio_sampler_stop ( aubio_sampler_t * o ) { return aubio_sampler_set_playing (o, 0); } void del_aubio_sampler( aubio_sampler_t * o ) { if (o->source) { del_aubio_source(o->source); } del_fvec(o->source_output); del_fmat(o->source_output_multi); AUBIO_FREE(o); }