74 lines
2.8 KiB
C++
74 lines
2.8 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 AUDIO_ADLIB_CTMIDI_H
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#define AUDIO_ADLIB_CTMIDI_H
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#include "audio/adlib_ms.h"
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/**
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* General MIDI AdLib driver based on CTMIDI.DRV version 1.04
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*/
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class MidiDriver_ADLIB_CTMIDI : public MidiDriver_ADLIB_Multisource {
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public:
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// Instrument bank from CTMIDI.DRV. Transpose is stored separately.
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static const AdLibIbkInstrumentDefinition CTMIDI_INSTRUMENT_BANK[128];
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// Instrument transpose parameter values
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static const int8 INSTRUMENT_TRANSPOSE[128];
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// Rhythm bank from CTMIDI.DRV. OPL note is stored separately.
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static const AdLibIbkInstrumentDefinition CTMIDI_RHYTHM_BANK[47];
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// Mapping from MIDI note value to rhythm instrument
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static const uint8 RHYTHM_NOTE_INSTRUMENT_MAP[47];
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// The OPL note to play for each rhythm instrument
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static const uint8 RHYTHM_NOTES[47];
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// F-num lookup table from CTMIDI.DRV
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static const uint16 CTMIDI_NOTE_FREQUENCIES[768];
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// Volume modifier lookup table
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static const int8 NOTE_VOLUME_MODIFIER_VALUES[18];
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MidiDriver_ADLIB_CTMIDI(OPL::Config::OplType oplType, int timerFrequency = OPL::OPL::kDefaultCallbackFrequency);
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~MidiDriver_ADLIB_CTMIDI() { };
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int open() override;
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void deinitSource(uint8 source) override;
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protected:
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// Instrument bank after conversion
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OplInstrumentDefinition _ctmidiInstrumentBank[128];
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// Rhythm bank after conversion
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OplInstrumentDefinition _ctmidiRhythmBank[47];
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/**
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* Sets the block / F-num registers for the rhythm instruments to default
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* values.
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*/
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void initRhythmDefaults();
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void programChange(uint8 channel, uint8 program, uint8 source) override;
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uint8 allocateOplChannel(uint8 channel, uint8 source, InstrumentInfo &instrumentInfo) override;
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void writeFrequency(uint8 oplChannel, OplInstrumentRhythmType rhythmType) 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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};
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#endif
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