ref: 52d6145a0a9a9ab5cada373d290c86c350a7f547
dir: /src/pitch/pitchfcomb.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/>. */ /** \file Pitch detection using a fast harmonic comb filter This pitch extraction method implements a fast harmonic comb filter to determine the fundamental frequency of a harmonic sound. This file was derived from the tuneit project, written by Mario Lang to detect the fundamental frequency of a sound. See http://delysid.org/tuneit.html \example pitch/test-pitchfcomb.c */ #ifndef _PITCHFCOMB_H #define _PITCHFCOMB_H #ifdef __cplusplus extern "C" { #endif /** pitch detection object */ typedef struct _aubio_pitchfcomb_t aubio_pitchfcomb_t; /** execute pitch detection on an input buffer \param p pitch detection object as returned by new_aubio_pitchfcomb \param input input signal window (length as specified at creation time) \param output pitch candidates in bins */ void aubio_pitchfcomb_do (aubio_pitchfcomb_t * p, fvec_t * input, fvec_t * output); /** creation of the pitch detection object \param buf_size size of the input buffer to analyse \param hop_size step size between two consecutive analysis instant */ aubio_pitchfcomb_t *new_aubio_pitchfcomb (uint_t buf_size, uint_t hop_size); /** deletion of the pitch detection object \param p pitch detection object as returned by new_aubio_pitchfcomb */ void del_aubio_pitchfcomb (aubio_pitchfcomb_t * p); #ifdef __cplusplus } #endif #endif /* _PITCHFCOMB_H */