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/*
Copyright (C) 2013-2021 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/audio_merger.h
* @brief AudioMerger class.
*/
#include "audio_buffers.h"
#include "dcpomatic_time.h"
#include "util.h"
/** @class AudioMerger.
* @brief A class that can merge audio data from many sources.
*/
class AudioMerger
{
public:
explicit AudioMerger (int frame_rate);
std::list<std::pair<std::shared_ptr<AudioBuffers>, dcpomatic::DCPTime>> pull (dcpomatic::DCPTime time);
void push (std::shared_ptr<const AudioBuffers> audio, dcpomatic::DCPTime time);
void clear ();
private:
Frame frames (dcpomatic::DCPTime t) const;
class Buffer
{
public:
/** @param c Channels
* @param f Frames
* @param t Time
* @param r Frame rate.
*/
Buffer (int c, int32_t f, dcpomatic::DCPTime t, int r)
: audio (std::make_shared<AudioBuffers>(c, f))
, time (t)
, frame_rate (r)
{}
Buffer (std::shared_ptr<AudioBuffers> a, dcpomatic::DCPTime t, int r)
: audio (a)
, time (t)
, frame_rate (r)
{}
std::shared_ptr<AudioBuffers> audio;
dcpomatic::DCPTime time;
int frame_rate;
dcpomatic::DCPTimePeriod period () const {
return dcpomatic::DCPTimePeriod(time, time + dcpomatic::DCPTime(audio->frames(), frame_rate));
}
};
std::list<Buffer> _buffers;
int _frame_rate;
};
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