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Diffstat (limited to 'engines/agos/drivers/accolade/adlib.h')
| -rw-r--r-- | engines/agos/drivers/accolade/adlib.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/engines/agos/drivers/accolade/adlib.h b/engines/agos/drivers/accolade/adlib.h new file mode 100644 index 0000000000..c044d2e05a --- /dev/null +++ b/engines/agos/drivers/accolade/adlib.h @@ -0,0 +1,121 @@ +/* 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 |