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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_decoder.h
* @brief Parent class for audio decoders.
*/
#ifndef DCPOMATIC_AUDIO_DECODER_H
#define DCPOMATIC_AUDIO_DECODER_H
#include "decoder.h"
#include "content_audio.h"
#include "audio_stream.h"
#include <boost/enable_shared_from_this.hpp>
class AudioBuffers;
class AudioContent;
class AudioDecoderStream;
/** @class AudioDecoder.
* @brief Parent class for audio decoders.
*/
class AudioDecoder : public virtual Decoder, public boost::enable_shared_from_this<AudioDecoder>
{
public:
AudioDecoder (boost::shared_ptr<const AudioContent>, bool fast);
boost::shared_ptr<const AudioContent> audio_content () const {
return _audio_content;
}
/** Try to fetch some audio from a specific place in this content.
* @param frame Frame to start from (after resampling, if applicable)
* @param length Frames to get (after resampling, if applicable)
* @param accurate true to try hard to return frames from exactly `frame', false if we don't mind nearby frames.
* @return Time-stamped audio data which may or may not be from the location (and of the length) requested.
*/
ContentAudio get_audio (AudioStreamPtr stream, Frame time, Frame length, bool accurate);
void set_ignore_audio ();
bool fast () const {
return _fast;
}
protected:
void audio (AudioStreamPtr stream, boost::shared_ptr<const AudioBuffers>, ContentTime);
void flush ();
void seek (ContentTime t, bool accurate);
private:
boost::shared_ptr<const AudioContent> _audio_content;
/** An AudioDecoderStream object to manage each stream in _audio_content */
std::map<AudioStreamPtr, boost::shared_ptr<AudioDecoderStream> > _streams;
bool _ignore_audio;
bool _fast;
};
#endif
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