101 lines
4.1 KiB
C++
101 lines
4.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef AGOS_DRIVERS_ACCOLADE_ADLIB_H
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#define AGOS_DRIVERS_ACCOLADE_ADLIB_H
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#include "audio/adlib_ms.h"
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namespace AGOS {
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class MidiDriver_Accolade_AdLib : public MidiDriver_ADLIB_Multisource {
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protected:
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static const byte RHYTHM_NOTE_INSTRUMENT_TYPES[40];
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static const uint16 OPL_NOTE_FREQUENCIES_INSTR_DAT[12];
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static const uint16 OPL_NOTE_FREQUENCIES_MUSIC_DRV[12];
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public:
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MidiDriver_Accolade_AdLib(OPL::Config::OplType oplType, bool newVersion, int timerFrequency);
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~MidiDriver_Accolade_AdLib() override;
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int open() override;
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using MidiDriver_ADLIB_Multisource::send;
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void send(int8 source, uint32 b) override;
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void deinitSource(uint8 source) override;
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// Read the specified data from INSTR.DAT or MUSIC.DRV.
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void readDriverData(byte *driverData, uint16 driverDataSize, bool isMusicDrv);
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// Returns the number of simultaneous SFX sources supported by the current
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// driver configuration.
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byte getNumberOfSfxSources();
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// Loads the specified instrument for the specified instrument source.
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void loadSfxInstrument(uint8 source, byte *instrumentData);
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// Sets the note (upper byte) and note fraction (lower byte; 1/256th notes)
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// for the specified SFX source.
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void setSfxNoteFraction(uint8 source, uint16 noteFraction);
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// Writes out the current frequency for the specified SFX source.
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void updateSfxNote(uint8 source);
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// Applies a workaround for an Elvira 1 OPL3 instrument issue.
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void patchE1Instruments();
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// Applies a workaround for a Waxworks OPL3 instrument issue.
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void patchWwInstruments();
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protected:
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InstrumentInfo determineInstrument(uint8 channel, uint8 source, uint8 note) override;
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uint8 allocateOplChannel(uint8 channel, uint8 source, InstrumentInfo &instrumentInfo) override;
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uint16 calculateFrequency(uint8 channel, uint8 source, uint8 note) override;
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uint8 calculateUnscaledVolume(uint8 channel, uint8 source, uint8 velocity, const OplInstrumentDefinition &instrumentDef, uint8 operatorNum) override;
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void writePanning(uint8 oplChannel, OplInstrumentRhythmType rhythmType = RHYTHM_TYPE_UNDEFINED) override;
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void writeFrequency(uint8 oplChannel, OplInstrumentRhythmType rhythmType = RHYTHM_TYPE_UNDEFINED) override;
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// Copies the specified instrument data (in INSTR.DAT/MUSIC.DRV format)
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// into the specified instrument definition.
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void loadInstrumentData(OplInstrumentDefinition &definition, byte *instrumentData,
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OplInstrumentRhythmType rhythmType, byte rhythmNote, bool newVersion);
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// False if the driver should have the behavior of the Elvira 1 driver;
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// true if it should have the behavior of the Elvira 2 / Waxworks version.
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bool _newVersion;
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// from INSTR.DAT/MUSIC.DRV - volume adjustment per instrument
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int8 _volumeAdjustments[128];
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// from INSTR.DAT/MUSIC.DRV - simple mapping between MIDI channel and AdLib channel
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byte _channelRemapping[16];
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// from INSTR.DAT/MUSIC.DRV - simple mapping between MIDI instruments and AdLib instruments
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byte _instrumentRemapping[128];
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// Points to one of the OPL_NOTE_FREQUENCIES arrays, depending on the driver version
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const uint16 *_oplNoteFrequencies;
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// Data used by AdLib SFX (Elvira 2 / Waxworks)
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// Instrument definition for each SFX source
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OplInstrumentDefinition _sfxInstruments[4];
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// Current MIDI note fraction (1/256th notes) for each SFX source
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byte _sfxNoteFractions[4];
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};
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} // End of namespace AGOS
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#endif
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