source: src/pitch/pitch.h @ 2b4d006

/*
  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*/