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https://github.com/scummvm/scummvm.git
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Coen Rampen
66bb075f1c
This adds support for the AdLib and MT-32 sound effects in Elvira 2 and Waxworks. It adds an option to the UI to toggle between sampled and synthesized SFX. It also adds the following enhancements: - AdLib OPL3 mode for Elvira 2, Waxworks and Simon 1 floppy demo. This can be selected using a new UI option. - Mixed AdLib/MIDI mode for Elvira 2 and Waxworks. - Implemented "monophonic chords", a feature of the original MIDI code which would play only the highest note of a chord on AdLib. Most noticable in the Waxworks music. - Added UI option to select Simon 1 DOS music tempos. - Rewrite of the AdLib and MT-32 drivers to remove duplication and make use of features of the standard multisource drivers. - Refactored MidiPlayer to standardize interface and remove code moved to the drivers and parsers.
79 lines
2.8 KiB
C++
79 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 AGOS_SIMON1_ADLIB_H
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#define AGOS_SIMON1_ADLIB_H
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#include "audio/adlib_ms.h"
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namespace AGOS {
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class MidiDriver_Simon1_AdLib : public MidiDriver_ADLIB_Multisource {
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private:
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struct RhythmMapEntry {
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// The OPL rhythm instrument to use.
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// The original interpreter would move a note played on the MIDI rhythm
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// channel to one of MIDI channels 11-15, each corresponding to an OPL
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// rhythm instrument.
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uint8 channel;
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// The instrument bank entry used to play the rhythm note.
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uint8 program;
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// The MIDI note number that is actually played.
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uint8 note;
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};
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public:
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MidiDriver_Simon1_AdLib(OPL::Config::OplType oplType, const byte *instrumentData);
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~MidiDriver_Simon1_AdLib();
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int open() override;
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void noteOn(uint8 channel, uint8 note, uint8 velocity, uint8 source) override;
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void programChange(uint8 channel, uint8 program, uint8 source) override;
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void deinitSource(uint8 source) override;
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// Turns off rhythm notes for sources with type MUSIC (typically source 0).
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// This should be called when a SFX source that uses rhythm notes starts
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// playing to prevent conflicts on the rhythm channels. Deinitializing a
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// SFX source will turn rhythm notes back on.
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void disableMusicRhythmNotes();
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private:
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static const RhythmMapEntry RHYTHM_MAP[];
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static const uint16 FREQUENCY_TABLE[];
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uint8 allocateOplChannel(uint8 channel, uint8 source, uint8 instrumentId) 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,
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OplInstrumentDefinition &instrumentDef, uint8 operatorNum) override;
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void parseInstrumentData(const byte *instrumentData);
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// True if rhythm notes for sources with type MUSIC should not be played.
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bool _musicRhythmNotesDisabled;
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};
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MidiDriver_Multisource *createMidiDriverSimon1AdLib(const char *instrumentFilename, OPL::Config::OplType);
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} // End of namespace AGOS
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#endif
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