aubio 0.4.2~alpha

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synth/test-wavetable.c
#include <aubio.h>
#include "utils_tests.h"
int main (int argc, char **argv)
{
sint_t err = 0;
if (argc < 2) {
err = 2;
PRINT_ERR("not enough arguments\n");
PRINT_MSG("usage: %s <output_path> [freq] [samplerate]\n", argv[0]);
return err;
}
uint_t samplerate = 44100; // default is the samplerate of input_path
uint_t hop_size = 256;
smpl_t freq = 440.;
char_t *sink_path = argv[1];
if ( argc == 4 ) samplerate = atoi(argv[3]);
if ( argc == 3 ) freq = atof(argv[2]);
fvec_t *vec = new_fvec(hop_size);
aubio_sink_t *sink = new_aubio_sink(sink_path, samplerate);
aubio_wavetable_t * wavetable = new_aubio_wavetable (samplerate, hop_size);
// 2 seconds duration, in samples
uint_t duration = 2 * samplerate;
uint_t n_frames = 0;
uint_t write = 0;
aubio_wavetable_play (wavetable);
aubio_wavetable_set_freq ( wavetable, freq );
uint_t region = 0;
do {
if ( n_frames > duration / 3 && region < 1) {
aubio_wavetable_stop (wavetable);
region++;
}
if ( n_frames > 2 * duration / 3 && region < 2) {
aubio_wavetable_play (wavetable);
aubio_wavetable_set_freq ( wavetable, freq / 2.);
region++;
}
if (duration - n_frames < hop_size * 2 ) {
aubio_wavetable_stop( wavetable );
}
if (duration - n_frames < hop_size ) {
write = duration - n_frames;
} else {
write = hop_size;
}
aubio_wavetable_do (wavetable, vec, vec);
aubio_sink_do(sink, vec, write);
n_frames += hop_size;
} while ( n_frames <= duration );
del_aubio_wavetable (wavetable);
del_aubio_sink(sink);
del_fvec(vec);
aubio_cleanup();
return 0;
}