diff options
Diffstat (limited to 'src/synth/sampler.c')
-rw-r--r-- | src/synth/sampler.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/synth/sampler.c b/src/synth/sampler.c new file mode 100644 index 0000000..7df1b5f --- /dev/null +++ b/src/synth/sampler.c @@ -0,0 +1,141 @@ +/* + 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); + if ((sint_t)blocksize < 1) { + AUBIO_ERR("sampler: got blocksize %d, but can not be < 1\n", blocksize); + goto beach; + } + s->samplerate = samplerate; + s->blocksize = blocksize; + s->source_output = new_fvec(blocksize); + s->source_output_multi = new_fmat(4, blocksize); + s->source = NULL; + s->playing = 0; + return s; +beach: + AUBIO_FREE(s); + return NULL; +} + +uint_t aubio_sampler_load( aubio_sampler_t * o, const char_t * uri ) +{ + if (o->source) del_aubio_source(o->source); + + if (o->uri) AUBIO_FREE(o->uri); + o->uri = AUBIO_ARRAY(char_t, strnlen(uri, PATH_MAX)); + strncpy(o->uri, uri, strnlen(uri, PATH_MAX)); + + 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, const 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, const 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 < o->blocksize ) 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 ( const 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); + } + if (o->uri) AUBIO_FREE(o->uri); + del_fvec(o->source_output); + del_fmat(o->source_output_multi); + AUBIO_FREE(o); +} |