aubio: examples/aubioonset.c

aubio 0.4.9

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examples/aubioonset.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_ONSET 1
#define PROG_HAS_OUTPUT 1
#define PROG_HAS_SILENCE 1
#define PROG_HAS_JACK 1
#include "parse_args.h"
aubio_onset_t *o;
aubio_wavetable_t *wavetable;
fvec_t *onset;
smpl_t is_onset;
void process_block(fvec_t *ibuf, fvec_t *obuf)
{
aubio_onset_do (o, ibuf, onset);
is_onset = fvec_get_sample(onset, 0);
if ( !usejack && ! sink_uri ) return;
fvec_zeros(obuf);
if ( is_onset ) {
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_onset ) {
print_time(aubio_onset_get_last (o));
outmsg ("\n");
}
}
int main(int argc, char **argv) {
int ret = 0;
examples_common_init(argc,argv);
o = new_aubio_onset (onset_method, buffer_size, hop_size, samplerate);
if (o == NULL) { ret = 1; goto beach; }
if (onset_threshold != 0.)
aubio_onset_set_threshold (o, onset_threshold);
if (silence_threshold != -90.)
aubio_onset_set_silence (o, silence_threshold);
if (onset_minioi != 0.)
aubio_onset_set_minioi_s (o, onset_minioi);
verbmsg ("using source: %s at %dHz\n", source_uri, samplerate);
verbmsg ("onset method: %s, ", onset_method);
verbmsg ("buffer_size: %d, ", buffer_size);
verbmsg ("hop_size: %d, ", hop_size);
verbmsg ("silence: %f, ", aubio_onset_get_silence(o));
verbmsg ("threshold: %f, ", aubio_onset_get_threshold(o));
verbmsg ("awhitening: %f, ", aubio_onset_get_awhitening(o));
verbmsg ("compression: %f\n", aubio_onset_get_compression(o));
onset = new_fvec (1);
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_onset (o);
del_aubio_wavetable (wavetable);
del_fvec (onset);
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_onset_set_threshold
uint_t aubio_onset_set_threshold(aubio_onset_t *o, smpl_t threshold)
set onset detection peak picking threshold
aubio_onset_do
void aubio_onset_do(aubio_onset_t *o, const fvec_t *input, fvec_t *onset)
execute onset detection
aubio_onset_get_threshold
smpl_t aubio_onset_get_threshold(const aubio_onset_t *o)
get onset peak picking threshold
aubio_onset_get_last
uint_t aubio_onset_get_last(const aubio_onset_t *o)
get the time of the latest onset detected, in samples
del_aubio_onset
void del_aubio_onset(aubio_onset_t *o)
delete onset detection object
aubio_onset_get_awhitening
smpl_t aubio_onset_get_awhitening(aubio_onset_t *o)
get onset detection adaptive whitening
aubio_onset_t
struct _aubio_onset_t aubio_onset_t
onset detection object
Definition onset.h:50
aubio_onset_set_silence
uint_t aubio_onset_set_silence(aubio_onset_t *o, smpl_t silence)
set onset detection silence threshold
aubio_onset_get_compression
smpl_t aubio_onset_get_compression(aubio_onset_t *o)
get onset detection log compression
aubio_onset_set_minioi_s
uint_t aubio_onset_set_minioi_s(aubio_onset_t *o, smpl_t minioi)
set minimum inter onset interval in seconds
aubio_onset_get_silence
smpl_t aubio_onset_get_silence(const aubio_onset_t *o)
get onset detection silence threshold
new_aubio_onset
aubio_onset_t * new_aubio_onset(const char_t *method, uint_t buf_size, uint_t hop_size, uint_t samplerate)
create onset detection object
fvec_t
Buffer for real data.
Definition fvec.h:67
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