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109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Original license header:
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*
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* Cabal - Legacy Game Implementations
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*
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* Cabal is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef BACKENDS_AUDIOCD_AUDIOCD_STREAM_H
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#define BACKENDS_AUDIOCD_AUDIOCD_STREAM_H
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#include "audio/audiostream.h"
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#include "common/mutex.h"
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#include "common/queue.h"
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#include "common/timer.h"
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class AudioCDStream : public Audio::SeekableAudioStream {
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public:
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AudioCDStream();
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~AudioCDStream();
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int readBuffer(int16 *buffer, const int numSamples);
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bool isStereo() const { return true; }
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int getRate() const { return 44100; }
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bool endOfData() const;
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bool seek(const Audio::Timestamp &where);
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Audio::Timestamp getLength() const;
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protected:
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virtual uint getStartFrame() const = 0;
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virtual uint getEndFrame() const = 0;
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virtual bool readFrame(int frame, int16 *buffer) = 0;
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void startTimer(bool fillBuffer = false);
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void stopTimer();
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enum {
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kBytesPerFrame = 2352,
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kSamplesPerFrame = kBytesPerFrame / 2
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};
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enum {
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kSecondsPerMinute = 60,
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kFramesPerSecond = 75
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};
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enum {
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// Keep about a second's worth of audio in the buffer
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kBufferThreshold = kFramesPerSecond
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};
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private:
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int16 _buffer[kSamplesPerFrame];
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int _frame;
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uint _bufferPos;
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Common::Queue<int16 *> _bufferQueue;
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int _bufferFrame;
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Common::Mutex _mutex;
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bool _forceStop;
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bool shouldForceStop() const;
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void forceStop();
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Common::Mutex _forceStopMutex;
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bool readNextFrame();
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static void timerProc(void *refCon);
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void onTimer();
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void emptyQueue();
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};
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#endif
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