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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.
*
*/
#ifndef SCUMM_PLAYER_V2CMS_H
#define SCUMM_PLAYER_V2CMS_H
#include "scumm/player_v2base.h" // for channel_data
class CMSEmulator;
namespace Scumm {
/**
* Scumm V2 CMS/Gameblaster MIDI driver.
*/
class Player_V2CMS : public Player_V2Base {
public:
Player_V2CMS(ScummEngine *scumm, Audio::Mixer *mixer);
virtual ~Player_V2CMS();
// MusicEngine API
virtual void setMusicVolume(int vol);
virtual void startSound(int sound);
virtual void stopSound(int sound);
virtual void stopAllSounds();
virtual int getMusicTimer();
virtual int getSoundStatus(int sound) const;
// AudioStream API
virtual int readBuffer(int16 *buffer, const int numSamples);
virtual bool isStereo() const { return true; }
private:
struct Voice {
byte attack;
byte decay;
byte sustain;
byte release;
byte octadd;
int16 vibrato;
int16 vibrato2;
int16 noise;
};
struct Voice2 {
byte *amplitudeOutput;
byte *freqOutput;
byte *octaveOutput;
uint8 channel;
int8 sustainLevel;
uint8 attackRate;
uint8 maxAmpl;
uint8 decayRate;
uint8 sustainRate;
uint8 releaseRate;
uint8 releaseTime;
int8 vibratoRate;
int8 vibratoDepth;
int8 curVibratoRate;
int8 curVibratoUnk;
int8 unkVibratoRate;
int8 unkVibratoDepth;
int8 unkRate;
int8 unkCount;
enum EnvelopeState {
kEnvelopeAttack,
kEnvelopeDecay,
kEnvelopeSustain,
kEnvelopeRelease
};
EnvelopeState nextProcessState;
uint8 curVolume;
uint8 curOctave;
uint8 curFreq;
int8 octaveAdd;
int8 playingNote;
Voice2 *nextVoice;
byte chanNumber;
};
struct MusicChip {
byte ampl[4];
byte freq[4];
byte octave[2];
};
Voice _cmsVoicesBase[16];
Voice2 _cmsVoices[8];
MusicChip _cmsChips[2];
uint8 _tempo;
uint8 _tempoSum;
byte _looping;
byte _octaveMask;
int16 _midiDelay;
Voice2 *_midiChannel[16];
byte _midiChannelUse[16];
byte *_midiData;
byte *_midiSongBegin;
int _loadedMidiSong;
byte _sfxFreq[4], _sfxAmpl[4], _sfxOctave[2];
byte _lastMidiCommand;
uint _outputTableReady;
byte _voiceTimer;
int _musicTimer, _musicTimerTicks;
void loadMidiData(byte *data, int sound);
void play();
void processChannel(Voice2 *channel);
void processRelease(Voice2 *channel);
void processAttack(Voice2 *channel);
void processDecay(Voice2 *channel);
void processSustain(Voice2 *channel);
void processVibrato(Voice2 *channel);
void playMusicChips(const MusicChip *table);
void playNote(byte *&data);
void clearNote(byte *&data);
void offAllChannels();
void playVoice();
void processMidiData();
Voice2 *getFreeVoice();
Voice2 *getPlayVoice(byte param);
struct MidiNote {
byte frequency;
byte baseOctave;
};
static const MidiNote _midiNotes[132];
static const byte _attackRate[16];
static const byte _decayRate[16];
static const byte _sustainRate[16];
static const byte _releaseRate[16];
static const byte _volumeTable[16];
static const byte _cmsInitData[26];
CMSEmulator *_cmsEmu;
};
} // End of namespace Scumm
#endif
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