ref: 0536612b984ce2c8b8a40764dec0e670e5235230
dir: /src/pitch/pitch.h/
/*
Copyright (C) 2003-2009 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/>.
*/
#ifndef PITCH_H
#define PITCH_H
#ifdef __cplusplus
extern "C" {
#endif
/** \file
Generic method for pitch detection
This file creates the objects required for the computation of the selected
pitch detection algorithm and output the results, in midi note or Hz.
*/
/** pitch detection object */
typedef struct _aubio_pitch_t aubio_pitch_t;
/** execute pitch detection on an input signal frame
\param o pitch detection object as returned by new_aubio_pitch()
\param in input signal of size [hop_size x channels]
\param out output pitch candidates of size [1 x channels]
*/
void aubio_pitch_do (aubio_pitch_t * o, fvec_t * in, fvec_t * out);
/** change yin or yinfft tolerance threshold
\param o pitch detection object as returned by new_aubio_pitch()
\param tol tolerance default is 0.15 for yin and 0.85 for yinfft
*/
uint_t aubio_pitch_set_tolerance (aubio_pitch_t * o, smpl_t tol);
/** deletion of the pitch detection object
\param o pitch detection object as returned by new_aubio_pitch()
*/
void del_aubio_pitch (aubio_pitch_t * o);
/** creation of the pitch detection object
\param method set pitch detection algorithm
\param buf_size size of the input buffer to analyse
\param hop_size step size between two consecutive analysis instant
\param channels number of channels to analyse
\param samplerate sampling rate of the signal
*/
aubio_pitch_t *new_aubio_pitch (char_t * method,
uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate);
/** set the output unit of the pitch detection object
\param o pitch detection object as returned by new_aubio_pitch()
\param mode set pitch units for output
*/
uint_t aubio_pitch_set_unit (aubio_pitch_t * o, char_t * mode);
#ifdef __cplusplus
}
#endif
#endif /*PITCH_H*/