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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/**
* Internal interface to the QuickTime audio decoder.
*
* This is available so that the QuickTimeVideoDecoder can use
* this directly.
*/
#ifndef AUDIO_QUICKTIME_INTERN_H
#define AUDIO_QUICKTIME_INTERN_H
#include "common/quicktime.h"
#include "common/scummsys.h"
#include "common/types.h"
#include "audio/audiostream.h"
namespace Common {
class SeekableReadStream;
class String;
}
namespace Audio {
class Codec;
class QuickTimeAudioDecoder : public Common::QuickTimeParser {
public:
QuickTimeAudioDecoder();
virtual ~QuickTimeAudioDecoder();
/**
* Load a QuickTime audio file
* @param filename the filename to load
*/
bool loadAudioFile(const Common::String &filename);
/**
* Load a QuickTime audio file from a SeekableReadStream
* @param stream the stream to load
*/
bool loadAudioStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeFileHandle);
protected:
class QuickTimeAudioTrack : public SeekableAudioStream {
public:
QuickTimeAudioTrack(QuickTimeAudioDecoder *decoder, Track *parentTrack);
~QuickTimeAudioTrack();
// AudioStream API
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return _queue->isStereo(); }
int getRate() const { return _queue->getRate(); }
bool endOfData() const;
// SeekableAudioStream API
bool seek(const Timestamp &where);
Timestamp getLength() const;
// Queue *at least* "length" audio
// If length is zero, it queues the next logical block of audio whether
// that be a whole edit or just one chunk within an edit
void queueAudio(const Timestamp &length = Timestamp());
Track *getParent() const { return _parentTrack; }
void queueRemainingAudio();
bool hasDataInQueue() const { return _samplesQueued != 0; }
private:
QuickTimeAudioDecoder *_decoder;
Track *_parentTrack;
QueuingAudioStream *_queue;
uint _curChunk;
Timestamp _curMediaPos, _skipSamples;
uint32 _curEdit, _samplesQueued;
bool _skipAACPrimer;
QueuingAudioStream *createStream() const;
AudioStream *readAudioChunk(uint chunk);
bool isOldDemuxing() const;
void skipSamples(const Timestamp &length, AudioStream *stream);
void findEdit(const Timestamp &position);
bool allDataRead() const;
void enterNewEdit(const Timestamp &position);
void queueStream(AudioStream *stream, const Timestamp &length);
uint32 getAudioChunkSampleCount(uint chunk) const;
Timestamp getChunkLength(uint chunk, bool skipAACPrimer = false) const;
uint32 getAACSampleTime(uint32 totalSampleCount, bool skipAACPrimer = false) const;
Timestamp getCurrentTrackTime() const;
};
class AudioSampleDesc : public Common::QuickTimeParser::SampleDesc {
public:
AudioSampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag);
~AudioSampleDesc();
bool isAudioCodecSupported() const;
AudioStream *createAudioStream(Common::SeekableReadStream *stream) const;
void initCodec();
// TODO: Make private in the long run
uint16 _bitsPerSample;
uint16 _channels;
uint32 _sampleRate;
uint32 _samplesPerFrame;
uint32 _bytesPerFrame;
private:
Codec *_codec;
};
// Common::QuickTimeParser API
virtual Common::QuickTimeParser::SampleDesc *readSampleDesc(Track *track, uint32 format, uint32 descSize);
void init();
Common::Array<QuickTimeAudioTrack *> _audioTracks;
};
} // End of namespace Audio
#endif
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