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examples/aubiopitch.c

*/

*//** pitch detection object

/*
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_PITCH 1
#define PROG_HAS_OUTPUT 1
#define PROG_HAS_SILENCE 1
#define PROG_HAS_JACK 1
#include "parse_args.h"
aubio_pitch_t *o;
aubio_wavetable_t *wavetable;
fvec_t *pitch;
void process_block(fvec_t * ibuf, fvec_t * obuf)
{
smpl_t freq;
aubio_pitch_do (o, ibuf, pitch);
if ( !usejack && ! sink_uri ) return;
fvec_zeros(obuf);
freq = fvec_get_sample(pitch, 0);
aubio_wavetable_set_amp ( wavetable, aubio_level_lin (ibuf) );
aubio_wavetable_set_freq ( wavetable, freq );
if (mix_input)
aubio_wavetable_do (wavetable, ibuf, obuf);
else
aubio_wavetable_do (wavetable, obuf, obuf);
}
void process_print (void)
{
smpl_t pitch_found = fvec_get_sample(pitch, 0);
print_time(blocks * hop_size);
outmsg(" %f\n", pitch_found);
}
int main(int argc, char **argv) {
int ret = 0;
buffer_size = 2048;
examples_common_init(argc,argv);
verbmsg ("using source: %s at %dHz\n", source_uri, samplerate);
verbmsg ("pitch method: %s, ", pitch_method);
verbmsg ("pitch unit: %s, ", pitch_unit);
verbmsg ("buffer_size: %d, ", buffer_size);
verbmsg ("hop_size: %d, ", hop_size);
verbmsg ("tolerance: %f\n", pitch_tolerance);
o = new_aubio_pitch (pitch_method, buffer_size, hop_size, samplerate);
if (o == NULL) { ret = 1; goto beach; }
if (pitch_tolerance != 0.)
aubio_pitch_set_tolerance (o, pitch_tolerance);
if (silence_threshold != -90.)
aubio_pitch_set_silence (o, silence_threshold);
if (pitch_unit != NULL)
aubio_pitch_set_unit (o, pitch_unit);
pitch = new_fvec (1);
wavetable = new_aubio_wavetable (samplerate, hop_size);
aubio_wavetable_play ( wavetable );
examples_common_process(process_block, process_print);
del_aubio_pitch (o);
del_aubio_wavetable (wavetable);
del_fvec (pitch);
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_level_lin
smpl_t aubio_level_lin(const fvec_t *v)
compute sound level on a linear scale
aubio_pitch_set_unit
uint_t aubio_pitch_set_unit(aubio_pitch_t *o, const char_t *mode)
set the output unit of the pitch detection object
aubio_pitch_do
void aubio_pitch_do(aubio_pitch_t *o, const fvec_t *in, fvec_t *out)
execute pitch detection on an input signal frame
del_aubio_pitch
void del_aubio_pitch(aubio_pitch_t *o)
deletion of the pitch detection object
new_aubio_pitch
aubio_pitch_t * new_aubio_pitch(const char_t *method, uint_t buf_size, uint_t hop_size, uint_t samplerate)
creation of the pitch detection object
aubio_pitch_set_tolerance
uint_t aubio_pitch_set_tolerance(aubio_pitch_t *o, smpl_t tol)
change yin or yinfft tolerance threshold
aubio_pitch_set_silence
uint_t aubio_pitch_set_silence(aubio_pitch_t *o, smpl_t silence)
set the silence threshold of the pitch 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_t
struct _aubio_wavetable_t aubio_wavetable_t
wavetable object
Definition wavetable.h:42
aubio_wavetable_set_amp
uint_t aubio_wavetable_set_amp(aubio_wavetable_t *o, smpl_t amp)
set wavetable amplitude
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