/usr/include/aubio/pitchschmitt.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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | /*
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 a Schmitt trigger
This pitch extraction method implements a Schmitt trigger to estimate the
period of a signal.
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
*/
#ifndef _PITCHSCHMITT_H
#define _PITCHSCHMITT_H
#ifdef __cplusplus
extern "C" {
#endif
/** pitch detection object */
typedef struct _aubio_pitchschmitt_t aubio_pitchschmitt_t;
/** execute pitch detection on an input buffer
\param p pitch detection object as returned by new_aubio_pitchschmitt
\param input input signal window (length as specified at creation time)
*/
smpl_t aubio_pitchschmitt_detect (aubio_pitchschmitt_t *p, fvec_t * input);
/** creation of the pitch detection object
\param size size of the input buffer to analyse
\param samplerate sampling rate of the signal
*/
aubio_pitchschmitt_t * new_aubio_pitchschmitt (uint_t size, uint_t samplerate);
/** deletion of the pitch detection object
\param p pitch detection object as returned by new_aubio_pitchschmitt
*/
void del_aubio_pitchschmitt (aubio_pitchschmitt_t *p);
#ifdef __cplusplus
}
#endif
#endif /* _PITCHSCHMITT_H */
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