aubio 0.4.9

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examples/aubiotrack.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 "utils.h"
#define PROG_HAS_TEMPO 1
#define PROG_HAS_ONSET 1
#define PROG_HAS_SILENCE 1
#define PROG_HAS_OUTPUT 1
#define PROG_HAS_JACK 1
#include "parse_args.h"
aubio_tempo_t * tempo;
aubio_wavetable_t *wavetable;
fvec_t * tempo_out;
smpl_t is_beat = 0.;
uint_t is_silence = 0;
void process_block(fvec_t * ibuf, fvec_t *obuf) {
aubio_tempo_do (tempo, ibuf, tempo_out);
is_beat = fvec_get_sample (tempo_out, 0);
if (silence_threshold != -90.)
is_silence = aubio_silence_detection(ibuf, silence_threshold);
if ( !usejack && ! sink_uri ) return;
fvec_zeros (obuf);
if ( is_beat && !is_silence ) {
aubio_wavetable_play ( wavetable );
/* send a midi tap (default to C0) out to the midi output */
if (usejack) send_noteon(miditap_note, miditap_velo);
} else {
aubio_wavetable_stop ( wavetable );
}
if (mix_input) {
aubio_wavetable_do (wavetable, ibuf, obuf);
} else {
aubio_wavetable_do (wavetable, obuf, obuf);
}
}
void process_print (void) {
if ( is_beat && !is_silence ) {
print_time (aubio_tempo_get_last (tempo));
outmsg ("\n");
}
}
int main(int argc, char **argv) {
int ret = 0;
// override general settings from utils.c
buffer_size = 1024;
hop_size = 512;
examples_common_init(argc,argv);
verbmsg ("using source: %s at %dHz\n", source_uri, samplerate);
verbmsg ("tempo method: %s, ", tempo_method);
verbmsg ("buffer_size: %d, ", buffer_size);
verbmsg ("hop_size: %d, ", hop_size);
verbmsg ("threshold: %f\n", onset_threshold);
tempo_out = new_fvec(2);
tempo = new_aubio_tempo(tempo_method, buffer_size, hop_size, samplerate);
if (tempo == NULL) { ret = 1; goto beach; }
// set silence threshold very low to output beats even during silence
// aubio_tempo_set_silence(tempo, -1000.);
if (onset_threshold != 0.) aubio_tempo_set_threshold (tempo, onset_threshold);
if (onset_minioi != 0.) errmsg ("warning: minioio not supported yet\n");
wavetable = new_aubio_wavetable (samplerate, hop_size);
aubio_wavetable_set_freq ( wavetable, 2450.);
//aubio_sampler_load (sampler, "/archives/sounds/woodblock.aiff");
examples_common_process(process_block, process_print);
// send a last note off
if (usejack) {
send_noteon (miditap_note, 0);
}
del_aubio_tempo(tempo);
del_aubio_wavetable (wavetable);
del_fvec(tempo_out);
beach:
examples_common_del();
return ret;
}
new_fvec
fvec_t * new_fvec(uint_t length)
fvec_t buffer creation function
del_fvec
void del_fvec(fvec_t *s)
fvec_t buffer deletion function
fvec_zeros
void fvec_zeros(fvec_t *s)
set all elements to zero
fvec_get_sample
smpl_t fvec_get_sample(const fvec_t *s, uint_t position)
read sample value in a buffer
aubio_silence_detection
uint_t aubio_silence_detection(const fvec_t *v, smpl_t threshold)
check if buffer level in dB SPL is under a given threshold
fvec_t
Buffer for real data.
Definition fvec.h:67
new_aubio_tempo
aubio_tempo_t * new_aubio_tempo(const char_t *method, uint_t buf_size, uint_t hop_size, uint_t samplerate)
create tempo detection object
del_aubio_tempo
void del_aubio_tempo(aubio_tempo_t *o)
delete tempo detection object
aubio_tempo_t
struct _aubio_tempo_t aubio_tempo_t
tempo detection structure
Definition tempo.h:41
aubio_tempo_set_threshold
uint_t aubio_tempo_set_threshold(aubio_tempo_t *o, smpl_t threshold)
set tempo detection peak picking threshold
aubio_tempo_get_last
uint_t aubio_tempo_get_last(aubio_tempo_t *o)
get the time of the latest beat detected, in samples
aubio_tempo_do
void aubio_tempo_do(aubio_tempo_t *o, const fvec_t *input, fvec_t *tempo)
execute tempo detection
uint_t
unsigned int uint_t
unsigned integer
Definition types.h:60
smpl_t
float smpl_t
short sample format (32 or 64 bits)
Definition types.h:41
new_aubio_wavetable
aubio_wavetable_t * new_aubio_wavetable(uint_t samplerate, uint_t hop_size)
create new wavetable object
aubio_wavetable_set_freq
uint_t aubio_wavetable_set_freq(aubio_wavetable_t *o, smpl_t freq)
set wavetable frequency
aubio_wavetable_do
void aubio_wavetable_do(aubio_wavetable_t *o, const fvec_t *input, fvec_t *output)
process wavetable function
aubio_wavetable_stop
uint_t aubio_wavetable_stop(aubio_wavetable_t *o)
stop wavetable
aubio_wavetable_t
struct _aubio_wavetable_t aubio_wavetable_t
wavetable object
Definition wavetable.h:42
aubio_wavetable_play
uint_t aubio_wavetable_play(aubio_wavetable_t *o)
play sample from start
del_aubio_wavetable
void del_aubio_wavetable(aubio_wavetable_t *o)
destroy aubio_wavetable_t object