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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_decoder.h
* @brief Parent class for audio decoders.
*/
#ifndef DCPOMATIC_AUDIO_DECODER_H
#define DCPOMATIC_AUDIO_DECODER_H
#include "audio_stream.h"
#include "content_audio.h"
#include "decoder.h"
#include "decoder_part.h"
#include <boost/signals2.hpp>
class AudioBuffers;
class AudioContent;
class AudioDecoderStream;
class Log;
class Film;
class Resampler;
/** @class AudioDecoder.
* @brief Parent class for audio decoders.
*/
class AudioDecoder : public std::enable_shared_from_this<AudioDecoder>, public DecoderPart
{
public:
AudioDecoder (Decoder* parent, std::shared_ptr<const AudioContent> content, bool fast);
boost::optional<dcpomatic::ContentTime> position (std::shared_ptr<const Film> film) const override;
void emit(std::shared_ptr<const Film> film, AudioStreamPtr stream, std::shared_ptr<const AudioBuffers>, dcpomatic::ContentTime, bool flushing = false);
void seek () override;
void flush ();
dcpomatic::ContentTime stream_position (std::shared_ptr<const Film> film, AudioStreamPtr stream) const;
boost::signals2::signal<void (AudioStreamPtr, ContentAudio)> Data;
private:
void silence (AudioStreamPtr stream, int milliseconds);
std::shared_ptr<const AudioContent> _content;
/** Frame after the last one that was emitted from Data (i.e. at the resampled rate, if applicable)
* for each AudioStream.
*/
typedef std::map<AudioStreamPtr, Frame> PositionMap;
PositionMap _positions;
typedef std::map<AudioStreamPtr, std::shared_ptr<Resampler>> ResamplerMap;
ResamplerMap _resamplers;
bool _fast;
};
#endif
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