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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.
*
*/
#include "agos/drivers/accolade/mididriver.h"
#include "audio/fmopl.h"
#include "audio/mididrv.h"
namespace AGOS {
#define AGOS_ADLIB_VOICES_COUNT 11
struct InstrumentEntry {
byte reg20op1; // Amplitude Modulation / Vibrato / Envelope Generator Type / Keyboard Scaling Rate / Modulator Frequency Multiple
byte reg40op1; // Level Key Scaling / Total Level
byte reg60op1; // Attack Rate / Decay Rate
byte reg80op1; // Sustain Level / Release Rate
byte reg20op2; // Amplitude Modulation / Vibrato / Envelope Generator Type / Keyboard Scaling Rate / Modulator Frequency Multiple
byte reg40op2; // Level Key Scaling / Total Level
byte reg60op2; // Attack Rate / Decay Rate
byte reg80op2; // Sustain Level / Release Rate
byte regC0; // Feedback / Algorithm, bit 0 - set -> both operators in use
};
class MidiDriver_Accolade_AdLib : public MidiDriver {
public:
MidiDriver_Accolade_AdLib();
virtual ~MidiDriver_Accolade_AdLib();
// MidiDriver
int open();
void close();
void send(uint32 b);
MidiChannel *allocateChannel() { return NULL; }
MidiChannel *getPercussionChannel() { return NULL; }
bool isOpen() const { return _isOpen; }
uint32 getBaseTempo() { return 1000000 / OPL::OPL::kDefaultCallbackFrequency; }
void setVolume(byte volume);
virtual uint32 property(int prop, uint32 param);
bool setupInstruments(byte *instrumentData, uint16 instrumentDataSize, bool useMusicDrvFile);
void setTimerCallback(void *timerParam, Common::TimerManager::TimerProc timerProc);
private:
bool _musicDrvMode;
// from INSTR.DAT/MUSIC.DRV - simple mapping between MIDI channel and MT32 channel
byte _channelMapping[AGOS_MIDI_CHANNEL_COUNT];
// from INSTR.DAT/MUSIC.DRV - simple mapping between MIDI instruments and MT32 instruments
byte _instrumentMapping[AGOS_MIDI_INSTRUMENT_COUNT];
// from INSTR.DAT/MUSIC.DRV - volume adjustment per instrument
signed char _instrumentVolumeAdjust[AGOS_MIDI_INSTRUMENT_COUNT];
// simple mapping between MIDI key notes and MT32 key notes
byte _percussionKeyNoteMapping[AGOS_MIDI_KEYNOTE_COUNT];
// from INSTR.DAT/MUSIC.DRV - adlib instrument data
InstrumentEntry *_instrumentTable;
byte _instrumentCount;
struct ChannelEntry {
const InstrumentEntry *currentInstrumentPtr;
byte currentNote;
byte currentA0hReg;
byte currentB0hReg;
int16 volumeAdjust;
byte velocity;
ChannelEntry() : currentInstrumentPtr(NULL), currentNote(0),
currentA0hReg(0), currentB0hReg(0), volumeAdjust(0), velocity(0) { }
};
byte _percussionReg;
OPL::OPL *_opl;
int _masterVolume;
Common::TimerManager::TimerProc _adlibTimerProc;
void *_adlibTimerParam;
bool _isOpen;
// stores information about all FM voice channels
ChannelEntry _channels[AGOS_ADLIB_VOICES_COUNT];
void onTimer();
void resetAdLib();
void resetAdLibOperatorRegisters(byte baseRegister, byte value);
void resetAdLibFMVoiceChannelRegisters(byte baseRegister, byte value);
void programChange(byte FMvoiceChannel, byte mappedInstrumentNr, byte MIDIinstrumentNr);
void programChangeSetInstrument(byte FMvoiceChannel, byte mappedInstrumentNr, byte MIDIinstrumentNr);
void setRegister(int reg, int value);
void noteOn(byte FMvoiceChannel, byte note, byte velocity);
void noteOnSetVolume(byte FMvoiceChannel, byte operatorReg, byte adjustedVelocity);
void noteOff(byte FMvoiceChannel, byte note, bool dontCheckNote);
};
} // End of namespace AGOS
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