ref: a682dbeeac8813c2e1ed1db97441e25a3823bd7b
parent: 6d44595eb6c015ded906623f61280a17ac0050f4
author: Paul Brossier <piem@piem.org>
date: Fri Mar 22 06:52:00 EDT 2013
src/synth/sampler.c: add a simple sampler
--- /dev/null
+++ b/src/synth/sampler.c
@@ -1,0 +1,129 @@
+/*
+ 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);
+}