aubio 0.4.2~alpha

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onset/test-onset.c
#include <aubio.h>
#include "utils_tests.h"
int main (int argc, char **argv)
{
uint_t err = 0;
if (argc < 2) {
err = 2;
PRINT_ERR("not enough arguments\n");
PRINT_MSG("read a wave file as a mono vector\n");
PRINT_MSG("usage: %s <source_path> [samplerate] [hop_size]\n", argv[0]);
return err;
}
uint_t samplerate = 0;
uint_t win_s = 1024; // window size
uint_t hop_size = win_s / 4;
uint_t n_frames = 0, read = 0;
if ( argc == 3 ) samplerate = atoi(argv[2]);
if ( argc == 4 ) hop_size = atoi(argv[3]);
char_t *source_path = argv[1];
aubio_source_t * source = new_aubio_source(source_path, samplerate, hop_size);
if (!source) { err = 1; goto beach; }
if (samplerate == 0 ) samplerate = aubio_source_get_samplerate(source);
// create some vectors
fvec_t * in = new_fvec (hop_size); // input audio buffer
fvec_t * out = new_fvec (2); // output position
// create onset object
aubio_onset_t * o = new_aubio_onset("default", win_s, hop_size, samplerate);
do {
// put some fresh data in input vector
aubio_source_do(source, in, &read);
// execute onset
aubio_onset_do(o,in,out);
// do something with the onsets
if (out->data[0] != 0) {
PRINT_MSG("onset at %.3fms, %.3fs, frame %d\n",
aubio_onset_get_last_ms(o), aubio_onset_get_last_s(o),
aubio_onset_get_last(o));
}
n_frames += read;
} while ( read == hop_size );
PRINT_MSG("read %.2fs, %d frames at %dHz (%d blocks) from %s\n",
n_frames * 1. / samplerate,
n_frames, samplerate,
n_frames / hop_size, source_path);
// clean up memory
del_aubio_source(source);
del_aubio_onset(o);
del_fvec(in);
del_fvec(out);
beach:
aubio_cleanup();
return err;
}