/*  Copyright (C) 2003-2014 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   Note detection object */ #ifndef _AUBIO_NOTES_H#define _AUBIO_NOTES_H #ifdef __cplusplusextern "C" {#endif /** notes detection object */typedef struct _aubio_notes_t aubio_notes_t;#pragma incomplete aubio_notes_t /** create notes detection object   \param method notes detection type as specified in specdesc.h  \param buf_size buffer size for phase vocoder  \param hop_size hop size for phase vocoder  \param samplerate sampling rate of the input signal   \return newly created ::aubio_notes_t */aubio_notes_t * new_aubio_notes (const char_t * method,    uint_t buf_size, uint_t hop_size, uint_t samplerate); /** delete notes detection object   \param o notes detection object to delete */void del_aubio_notes(aubio_notes_t * o); /** execute note detection on an input signal frame   \param o note detection object as returned by new_aubio_notes()  \param input input signal of size [hop_size]  \param output output notes, fvec of length 3   The notes output is a vector of length 3 containing:   - 0. the midi note value, or 0 if no note was found   - 1. the note velocity   - 2. the midi note to turn off */void aubio_notes_do (aubio_notes_t *o, const fvec_t * input, fvec_t * output); /** set notes detection silence threshold   \param o notes detection object as returned by new_aubio_notes()  \param silence new silence detection threshold   \return 0 on success, non-zero otherwise */uint_t aubio_notes_set_silence(aubio_notes_t * o, smpl_t silence); /** get notes detection silence threshold   \param o notes detection object as returned by new_aubio_notes()   \return current silence threshold */smpl_t aubio_notes_get_silence(const aubio_notes_t * o); /** get notes detection minimum inter-onset interval, in millisecond   \param o notes detection object as returned by new_aubio_notes()   \return current minimum inter onset interval  */smpl_t aubio_notes_get_minioi_ms(const aubio_notes_t *o); /** set notes detection minimum inter-onset interval, in millisecond   \param o notes detection object as returned by new_aubio_notes()  \param minioi_ms new inter-onset interval   \return 0 on success, non-zero otherwise */uint_t aubio_notes_set_minioi_ms (aubio_notes_t *o, smpl_t minioi_ms); /** get notes object release drop level, in dB   \param o notes detection object as returned by new_aubio_notes()   \return current release drop level, in dB  */smpl_t aubio_notes_get_release_drop (const aubio_notes_t *o); /** set note release drop level, in dB   This function sets the release_drop_level parameter, in dB. When a new note  is found, the current level in dB is measured. If the measured level drops  under that initial level - release_drop_level, then a note-off will be  emitted.   Defaults to `10`, in dB.   \note This parameter was added in version `0.4.8`. Results obtained with  earlier versions can be reproduced by setting this value to `100`, so that  note-off will not be played until the next note.   \param o notes detection object as returned by new_aubio_notes()  \param release_drop new release drop level, in dB   \return 0 on success, non-zero otherwise */uint_t aubio_notes_set_release_drop (aubio_notes_t *o, smpl_t release_drop); #ifdef __cplusplus}#endif #endif /* _AUBIO_NOTES_H */