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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 AGI_SOUND_H
#define AGI_SOUND_H
#include "sound/audiostream.h"
#include "sound/mixer.h"
namespace Agi {
#define BUFFER_SIZE 410
#define SOUND_EMU_NONE 0
#define SOUND_EMU_PC 1
#define SOUND_EMU_TANDY 2
#define SOUND_EMU_MAC 3
#define SOUND_EMU_AMIGA 4
#define SOUND_PLAYING 0x01
#define WAVEFORM_SIZE 64
#define ENV_ATTACK 10000 /**< envelope attack rate */
#define ENV_DECAY 1000 /**< envelope decay rate */
#define ENV_SUSTAIN 100 /**< envelope sustain level */
#define ENV_RELEASE 7500 /**< envelope release rate */
#define NUM_CHANNELS 7 /**< number of sound channels */
/**
* AGI sound resource structure.
*/
struct AgiSound {
uint32 flen; /**< size of raw data */
uint8 *rdata; /**< raw sound data */
uint8 flags; /**< sound flags */
uint16 type; /**< sound resource type */
};
#include "common/pack-start.h"
/**
* AGI sound note structure.
*/
struct AgiNote {
uint8 durLo; /**< LSB of note duration */
uint8 durHi; /**< MSB of note duration */
uint8 frq0; /**< LSB of note frequency */
uint8 frq1; /**< MSB of note frequency */
uint8 vol; /**< note volume */
};
#include "common/pack-end.h"
/**
* AGI engine sound channel structure.
*/
struct ChannelInfo {
#define AGI_SOUND_SAMPLE 0x0001
#define AGI_SOUND_MIDI 0x0002
#define AGI_SOUND_4CHN 0x0008
uint32 type;
struct AgiNote *ptr;
int16 *ins;
int32 size;
uint32 phase;
#define AGI_SOUND_LOOP 0x0001
#define AGI_SOUND_ENVELOPE 0x0002
uint32 flags;
#define AGI_SOUND_ENV_ATTACK 3
#define AGI_SOUND_ENV_DECAY 2
#define AGI_SOUND_ENV_SUSTAIN 1
#define AGI_SOUND_ENV_RELEASE 0
uint32 adsr;
int32 timer;
uint32 end;
uint32 freq;
uint32 vol;
uint32 env;
};
class AgiEngine;
class SoundMgr : public Audio::AudioStream {
AgiEngine *_vm;
public:
SoundMgr(AgiEngine *agi, Audio::Mixer *pMixer);
~SoundMgr();
virtual void setVolume(uint8 volume);
// AudioStream API
int readBuffer(int16 *buffer, const int numSamples) {
premixerCall(buffer, numSamples / 2);
return numSamples;
}
bool isStereo() const {
return false;
}
bool endOfData() const {
return false;
}
int getRate() const {
// FIXME: Ideally, we should use _sampleRate.
return 22050;
}
private:
Audio::Mixer *_mixer;
Audio::SoundHandle _soundHandle;
uint32 _sampleRate;
void premixerCall(int16 *buf, uint len);
public:
void decodeSound(int);
void unloadSound(int);
void playSound();
int initSound();
void deinitSound();
void startSound(int, int);
void stopSound();
void stopNote(int i);
void playNote(int i, int freq, int vol);
void playAgiSound();
uint32 mixSound();
bool loadInstruments();
#ifdef USE_IIGS_SOUND
void playMidiSound();
void playSampleSound();
#endif
};
} // End of namespace Agi
#endif /* AGI_SOUND_H */
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