ref: b8c6c1ea17f8d140ddcacd91514ad24ad1a50103
dir: /src/io/sink.h/
/*
Copyright (C) 2012-2014 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/>.
*/
#ifndef AUBIO_SINK_H
#define AUBIO_SINK_H
/** \file
Media sink to write blocks of consecutive audio samples to file.
To read from file, use ::aubio_source_t.
Depending on how aubio was compiled, the following sinks will be available.
When creating a new sink using ::new_aubio_sink, the new function of each of
the compiled-in sinks will be attempted, in the following order, until one of
them gets successfully created. If all sinks returned NULL, ::new_aubio_sink
will return NULL.
\b \p sink_apple_audio : ExtAudioFileRef
This sink uses CoreAudio [Extended Audio File Services]
(https://developer.apple.com/library/mac/documentation/MusicAudio/Reference/ExtendedAudioFileServicesReference/Reference/reference.html)
to write 16-bits encoded WAV files.
\b \p sink_sndfile : libsndfile
This sink uses [libsndfile](http://www.mega-nerd.com/libsndfile/) to write
16-bits encoded WAV files.
\b \p sink_wavwrite : native WAV write
A simple sink to write 16-bits PCM RIFF encoded WAV files.
\example io/test-sink.c
*/
#ifdef __cplusplus
extern "C" {
#endif
/** media sink object */
typedef struct _aubio_sink_t aubio_sink_t;
/**
create new ::aubio_sink_t
\param uri the file path or uri to write to
\param samplerate sample rate to write the file at
\return newly created ::aubio_sink_t
Creates a new sink object.
If samplerate is set to 0, the creation of the file will be delayed until
both ::aubio_sink_preset_samplerate and ::aubio_sink_preset_channels have
been called.
*/
aubio_sink_t * new_aubio_sink(const char_t * uri, uint_t samplerate);
/**
preset sink samplerate
\param s sink, created with ::new_aubio_sink
\param samplerate samplerate to preset the sink to, in Hz
\return 0 on success, 1 on error
Preset the samplerate of the sink. The file should have been created using a
samplerate of 0.
The file will be opened only when both samplerate and channels have been set.
*/
uint_t aubio_sink_preset_samplerate(aubio_sink_t *s, uint_t samplerate);
/**
preset sink channels
\param s sink, created with ::new_aubio_sink
\param channels number of channels to preset the sink to
\return 0 on success, 1 on error
Preset the samplerate of the sink. The file should have been created using a
samplerate of 0.
The file will be opened only when both samplerate and channels have been set.
*/
uint_t aubio_sink_preset_channels(aubio_sink_t *s, uint_t channels);
/**
get samplerate of sink object
\param s sink object, created with ::new_aubio_sink
\return samplerate, in Hz
*/
uint_t aubio_sink_get_samplerate(const aubio_sink_t *s);
/**
get channels of sink object
\param s sink object, created with ::new_aubio_sink
\return number of channels
*/
uint_t aubio_sink_get_channels(const aubio_sink_t *s);
/**
write monophonic vector of length hop_size to sink
\param s sink, created with ::new_aubio_sink
\param write_data ::fvec_t samples to write to sink
\param write number of frames to write
*/
void aubio_sink_do(aubio_sink_t * s, fvec_t * write_data, uint_t write);
/**
write polyphonic vector of length hop_size to sink
\param s sink, created with ::new_aubio_sink
\param write_data ::fmat_t samples to write to sink
\param write number of frames to write
*/
void aubio_sink_do_multi(aubio_sink_t * s, fmat_t * write_data, uint_t write);
/**
close sink
\param s sink object, created with ::new_aubio_sink
\return 0 on success, non-zero on failure
*/
uint_t aubio_sink_close(aubio_sink_t * s);
/**
close sink and cleanup memory
\param s sink object, created with ::new_aubio_sink
*/
void del_aubio_sink(aubio_sink_t * s);
#ifdef __cplusplus
}
#endif
#endif /* AUBIO_SINK_H */