andrew@0: /* andrew@0: Copyright (C) 2003 Paul Brossier andrew@0: andrew@0: This program is free software; you can redistribute it and/or modify andrew@0: it under the terms of the GNU General Public License as published by andrew@0: the Free Software Foundation; either version 2 of the License, or andrew@0: (at your option) any later version. andrew@0: andrew@0: This program is distributed in the hope that it will be useful, andrew@0: but WITHOUT ANY WARRANTY; without even the implied warranty of andrew@0: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the andrew@0: GNU General Public License for more details. andrew@0: andrew@0: You should have received a copy of the GNU General Public License andrew@0: along with this program; if not, write to the Free Software andrew@0: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. andrew@0: andrew@0: */ andrew@0: andrew@0: /** \file andrew@0: andrew@0: Pitch detection using a fast harmonic comb filter andrew@0: andrew@0: This pitch extraction method implements a fast harmonic comb filter to andrew@0: determine the fundamental frequency of a harmonic sound. andrew@0: andrew@0: This file was derived from the tuneit project, written by Mario Lang to andrew@0: detect the fundamental frequency of a sound. andrew@0: andrew@0: see http://delysid.org/tuneit.html andrew@0: andrew@0: */ andrew@0: andrew@0: #ifndef _PITCHFCOMB_H andrew@0: #define _PITCHFCOMB_H andrew@0: andrew@0: #ifdef __cplusplus andrew@0: extern "C" { andrew@0: #endif andrew@0: andrew@0: /** pitch detection object */ andrew@0: typedef struct _aubio_pitchfcomb_t aubio_pitchfcomb_t; andrew@0: andrew@0: /** execute pitch detection on an input buffer andrew@0: andrew@0: \param p pitch detection object as returned by new_aubio_pitchfcomb andrew@0: \param input input signal window (length as specified at creation time) andrew@0: andrew@0: */ andrew@0: smpl_t aubio_pitchfcomb_detect (aubio_pitchfcomb_t *p, fvec_t * input); andrew@0: /** creation of the pitch detection object andrew@0: andrew@0: \param bufsize size of the input buffer to analyse andrew@0: \param hopsize step size between two consecutive analysis instant andrew@0: \param samplerate sampling rate of the signal andrew@0: andrew@0: */ andrew@0: aubio_pitchfcomb_t * new_aubio_pitchfcomb (ba_uint_t bufsize, ba_uint_t hopsize, ba_uint_t samplerate); andrew@0: /** deletion of the pitch detection object andrew@0: andrew@0: \param p pitch detection object as returned by new_aubio_pitchfcomb andrew@0: andrew@0: */ andrew@0: void del_aubio_pitchfcomb (aubio_pitchfcomb_t *p); andrew@0: andrew@0: andrew@0: #ifdef __cplusplus andrew@0: } andrew@0: #endif andrew@0: andrew@0: #endif /* _PITCHFCOMB_H */ andrew@0: andrew@0: