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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.
*
* Original license header:
*
* Cabal - Legacy Game Implementations
*
* Cabal 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.
*
*/
#ifndef BACKENDS_AUDIOCD_AUDIOCD_STREAM_H
#define BACKENDS_AUDIOCD_AUDIOCD_STREAM_H
#include "audio/audiostream.h"
#include "common/mutex.h"
#include "common/queue.h"
#include "common/timer.h"
class AudioCDStream : public Audio::SeekableAudioStream {
public:
AudioCDStream();
~AudioCDStream();
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return true; }
int getRate() const { return 44100; }
bool endOfData() const;
bool seek(const Audio::Timestamp &where);
Audio::Timestamp getLength() const;
protected:
virtual uint getStartFrame() const = 0;
virtual uint getEndFrame() const = 0;
virtual bool readFrame(int frame, int16 *buffer) = 0;
void startTimer(bool fillBuffer = false);
void stopTimer();
enum {
kBytesPerFrame = 2352,
kSamplesPerFrame = kBytesPerFrame / 2
};
enum {
kSecondsPerMinute = 60,
kFramesPerSecond = 75
};
enum {
// Keep about a second's worth of audio in the buffer
kBufferThreshold = kFramesPerSecond
};
private:
int16 _buffer[kSamplesPerFrame];
int _frame;
uint _bufferPos;
Common::Queue<int16 *> _bufferQueue;
int _bufferFrame;
Common::Mutex _mutex;
bool _forceStop;
bool shouldForceStop() const;
void forceStop();
Common::Mutex _forceStopMutex;
bool readNextFrame();
static void timerProc(void *refCon);
void onTimer();
void emptyQueue();
};
#endif
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