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/*
Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
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 src/lib/audio_buffers.h
* @brief AudioBuffers class.
*/
#ifndef DCPOMATIC_AUDIO_BUFFERS_H
#define DCPOMATIC_AUDIO_BUFFERS_H
#include <boost/shared_ptr.hpp>
#include <stdint.h>
/** @class AudioBuffers
* @brief A class to hold multi-channel audio data in float format.
*/
class AudioBuffers
{
public:
AudioBuffers (int channels, int frames);
AudioBuffers (AudioBuffers const &);
AudioBuffers (boost::shared_ptr<const AudioBuffers>);
~AudioBuffers ();
AudioBuffers & operator= (AudioBuffers const &);
boost::shared_ptr<AudioBuffers> clone () const;
boost::shared_ptr<AudioBuffers> channel (int) const;
void ensure_size (int);
float** data () const {
return _data;
}
float* data (int) const;
int channels () const {
return _channels;
}
int frames () const {
return _frames;
}
void set_frames (int f);
void make_silent ();
void make_silent (int c);
void make_silent (int from, int frames);
void apply_gain (float);
void copy_from (AudioBuffers const * from, int frames_to_copy, int read_offset, int write_offset);
void copy_channel_from (AudioBuffers const * from, int from_channel, int to_channel);
void move (int from, int to, int frames);
void accumulate_channel (AudioBuffers const * from, int from_channel, int to_channel, float gain = 1);
void accumulate_frames (AudioBuffers const *, int read_offset, int write_offset, int frames);
private:
void allocate (int, int);
void deallocate ();
/** Number of channels */
int _channels;
/** Number of frames (where a frame is one sample across all channels) */
int _frames;
/** Number of frames that _data can hold */
int _allocated_frames;
/** Audio data (so that, e.g. _data[2][6] is channel 2, sample 6) */
float** _data;
};
#endif
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