/usr/include/aubio/pitchmcomb.h is in libaubio-dev 0.3.2-4.2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 2003 Paul Brossier
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** \file
Pitch detection using multiple-comb filter
This fundamental frequency estimation algorithm implements spectral
flattening, multi-comb filtering and peak histogramming.
This method was designed by Juan P. Bello and described in:
Juan-Pablo Bello. ``Towards the Automated Analysis of Simple Polyphonic
Music''. PhD thesis, Centre for Digital Music, Queen Mary University of
London, London, UK, 2003.
*/
#ifndef PITCHMCOMB_H
#define PITCHMCOMB_H
#ifdef __cplusplus
extern "C" {
#endif
/** pitch detection object */
typedef struct _aubio_pitchmcomb_t aubio_pitchmcomb_t;
/** execute pitch detection on an input spectral frame
\param p pitch detection object as returned by new_aubio_pitchmcomb
\param fftgrain input signal spectrum as computed by aubio_pvoc_do
*/
smpl_t aubio_pitchmcomb_detect(aubio_pitchmcomb_t * p, cvec_t * fftgrain);
/** select the best candidates */
uint_t aubio_pitch_cands(aubio_pitchmcomb_t * p, cvec_t * fftgrain, smpl_t * cands);
/** creation of the pitch detection object
\param bufsize size of the input buffer to analyse
\param hopsize step size between two consecutive analysis instant
\param channels number of channels to analyse
\param samplerate sampling rate of the signal
*/
aubio_pitchmcomb_t * new_aubio_pitchmcomb(uint_t bufsize, uint_t hopsize, uint_t channels, uint_t samplerate);
/** deletion of the pitch detection object
\param p pitch detection object as returned by new_aubio_pitchfcomb
*/
void del_aubio_pitchmcomb(aubio_pitchmcomb_t *p);
#ifdef __cplusplus
}
#endif
#endif/*PITCHMCOMB_H*/
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