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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 Ivan Dubrov
* Copyright (C) 2004-2006 The ScummVM project
*
* 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.
*
* $URL$
* $Id$
*
*/
#ifndef GOB_SOUND_H
#define GOB_SOUND_H
#include "sound/audiostream.h"
#include "sound/mixer.h"
namespace Gob {
class Snd : public Audio::AudioStream {
public:
struct SoundDesc {
Audio::SoundHandle handle;
char *data;
uint32 size;
int16 repCount;
int16 timerTicks;
int16 inClocks;
int16 frequency;
int16 flag;
SoundDesc() : data(0), size(0), repCount(0), timerTicks(0),
inClocks(0), frequency(0), flag(0) {}
};
typedef void (*CleanupFuncPtr) (int16);
char _playingSound;
CleanupFuncPtr _cleanupFunc;
Snd(GobEngine *vm);
void speakerOn(int16 frequency, int32 length);
void speakerOff(void);
SoundDesc *loadSoundData(const char *path);
void stopSound(int16 fadeLength);
void playSample(SoundDesc *sndDesc, int16 repCount, int16 frequency, int16 fadeLength = 0);
void playComposition(int16 *composition, int16 freqVal);
void stopComposition(void);
void waitEndPlay(void);
// This deletes sndDesc and stops playing the sample.
// If freedata is set, it also delete[]s the sample data.
void freeSoundDesc(SoundDesc *sndDesc, bool freedata=true);
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return false; }
bool endOfData() const { return _end; }
bool endOfStream() const { return false; }
int getRate() const { return _rate; }
protected:
// TODO: This is a very primitive square wave generator. The only thing is
// has in common with the PC speaker is that it sounds terrible.
class SquareWaveStream : public Audio::AudioStream {
private:
uint _rate;
bool _beepForever;
uint32 _periodLength;
uint32 _periodSamples;
uint32 _remainingSamples;
int16 _sampleValue;
public:
SquareWaveStream() {}
~SquareWaveStream() {}
void playNote(int freq, int32 ms, uint rate);
int readBuffer(int16 *buffer, const int numSamples);
bool endOfData() const { return _remainingSamples == 0; }
bool isStereo() const { return false; }
int getRate() const { return _rate; }
};
SquareWaveStream _speakerStream;
Audio::SoundHandle _speakerHandle;
Audio::SoundHandle *_activeHandle;
Audio::SoundHandle _compositionHandle;
int16 _composition[50];
int8 _compositionPos;
Audio::SoundHandle _handle;
Common::Mutex _mutex;
SoundDesc *_curSoundDesc;
bool _end;
int8 *_data;
uint32 _length;
uint32 _rate;
int32 _freq;
int32 _repCount;
double _offset;
double _ratio;
double _frac;
int16 _cur;
int16 _last;
bool _fade;
double _fadeVol;
double _fadeVolStep;
uint8 _fadeLength;
uint32 _fadeSamples;
uint32 _curFadeSamples;
GobEngine *_vm;
void cleanupFuncCallback() {;}
int16 checkProAudio(void) {return 0;}
int16 checkAdlib(void) {return 0;}
int16 checkBlaster(void) {return 0;}
void writeAdlib(int16 port, int16 data);
void setBlasterPort(int16 port);
void setResetTimerFlag(char flag){return;}
void setSample(Snd::SoundDesc *sndDesc, int16 repCount, int16 frequency, int16 fadeLength);
void checkEndSample(void);
void nextCompositionPos(void);
};
} // End of namespace Gob
#endif
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