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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.
*
* $URL$
* $Id$
*
*/
#ifndef GOB_SOUND_H
#define GOB_SOUND_H
#include "common/mutex.h"
#include "sound/audiostream.h"
#include "sound/mixer.h"
namespace Gob {
enum SoundType {
SOUND_SND,
SOUND_ADL
};
enum SoundSource {
SOUND_FILE,
SOUND_TOT,
SOUND_EXT
};
class SoundDesc {
public:
int16 _repCount;
int16 _frequency;
int16 _flag;
int16 _id;
byte *getData() { return _dataPtr; }
uint32 size() { return _size; }
bool empty() { return !_dataPtr; }
bool isId(int16 id) { return _dataPtr && _id == id; }
SoundType getType() { return _type; }
void set(SoundType type, SoundSource src, byte *data, uint32 dSize);
void load(SoundType type, SoundSource src, byte *data, uint32 dSize);
void free();
void convToSigned();
// Which fade out length to use when the fade starts half-way through?
int16 calcFadeOutLength(int16 frequency) {
return (10 * (_size / 2)) / frequency;
}
uint32 calcLength(int16 repCount, int16 frequency, bool fade) {
uint32 fadeSize = fade ? _size / 2 : 0;
return ((_size * repCount - fadeSize) * 1000) / frequency;
}
SoundDesc() : _data(0), _dataPtr(0), _size(0), _type(SOUND_SND),
_source(SOUND_FILE), _repCount(0), _frequency(0),
_flag(0), _id(0) {}
~SoundDesc() { free(); }
private:
byte *_data;
byte *_dataPtr;
uint32 _size;
SoundType _type;
SoundSource _source;
void loadSND(byte *data, uint32 dSize);
void loadADL(byte *data, uint32 dSize);
};
class Snd : public Audio::AudioStream {
public:
char _playingSound;
Snd(GobEngine *vm);
~Snd();
void speakerOn(int16 frequency, int32 length);
void speakerOff();
void speakerOnUpdate(uint32 milis);
void stopSound(int16 fadeLength, SoundDesc *sndDesc = 0);
bool loadSample(SoundDesc &sndDesc, const char *fileName);
void freeSample(SoundDesc &sndDesc);
void playSample(SoundDesc &sndDesc, int16 repCount,
int16 frequency, int16 fadeLength = 0);
void playComposition(int16 *composition, int16 freqVal,
SoundDesc *sndDescs = 0, int8 sndCount = 60);
void stopComposition();
void setRepeating(int32 repCount);
void waitEndPlay(bool interruptible = false, bool stopComp = true);
static void convToSigned(byte *buffer, int length) {
while (length-- > 0)
*buffer++ ^= 0x80;
}
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 it
// has in common with the PC speaker is that it sounds terrible.
// Note: The SCUMM code has a PC speaker implementations; maybe it could be
// refactored to be reusable by all engines. And DosBox also has code
// for emulating the PC speaker.
class SquareWaveStream : public Audio::AudioStream {
private:
uint _rate;
bool _beepForever;
uint32 _periodLength;
uint32 _periodSamples;
uint32 _remainingSamples;
uint32 _mixedSamples;
int16 _sampleValue;
public:
SquareWaveStream();
void playNote(int freq, int32 ms, uint rate);
void update(uint32 milis);
void stop(uint32 milis);
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return false; }
bool endOfData() const { return false; }
bool endOfStream() const { return false; }
int getRate() const { return _rate; }
};
SquareWaveStream _speakerStream;
Audio::SoundHandle _speakerHandle;
uint32 _speakerStartTimeKey;
Audio::SoundHandle *_activeHandle;
Audio::SoundHandle _compositionHandle;
SoundDesc *_compositionSamples;
int8 _compositionSampleCount;
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;
uint32 _offset;
uint32 _offsetFrac;
uint32 _offsetInc;
uint32 _offsetIncFrac;
int16 _cur;
int16 _last;
bool _fade;
int32 _fadeVol;
int32 _fadeVolStep;
uint8 _fadeLength;
uint32 _fadeSamples;
uint32 _curFadeSamples;
GobEngine *_vm;
void setSample(SoundDesc &sndDesc, int16 repCount,
int16 frequency, int16 fadeLength);
void checkEndSample();
void nextCompositionPos();
};
} // End of namespace Gob
#endif // GOB_SOUND_H
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