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/*
Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file src/lib/audio_buffers.h
* @brief AudioBuffers class.
*/
#ifndef DCPOMATIC_AUDIO_BUFFERS_H
#define DCPOMATIC_AUDIO_BUFFERS_H
#include <memory>
#include <vector>
/** @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 &);
explicit AudioBuffers(std::shared_ptr<const AudioBuffers>);
AudioBuffers(std::shared_ptr<const AudioBuffers> other, int frames_to_copy, int read_offset);
AudioBuffers & operator=(AudioBuffers const &);
std::shared_ptr<AudioBuffers> clone() const;
std::shared_ptr<AudioBuffers> channel(int) const;
float* const* data() const {
return _data_pointers.data();
}
float const* data(int) const;
float* data(int);
int channels() const {
return _data.size();
}
int frames() const {
return _data.empty() ? 0 : _data[0].size();
}
void set_frames(int f);
void set_channels(int new_channels);
void make_silent();
void make_silent(int channel);
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 frames, int from, int to);
void accumulate_channel(AudioBuffers const * from, int from_channel, int to_channel, float gain = 1);
void accumulate_frames(AudioBuffers const * from, int frames, int read_offset, int write_offset);
void append(std::shared_ptr<const AudioBuffers> other);
void trim_start(int frames);
private:
void allocate(int channels, int frames);
void update_data_pointers();
/** Audio data (so that, e.g. _data[2][6] is channel 2, sample 6) */
std::vector<std::vector<float>> _data;
/** Pointers to the data of each vector in _data */
std::vector<float*> _data_pointers;
};
#endif
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