AUDIO: Add Casio MT-540/CT-460/CSM-1 MIDI driver
This adds a MIDI driver for the Casio MT-540, CT-460 and CSM-1 devices. These are supported by Elvira 1 and several Sierra SCI0 games as well as Altered Destiny and Les Manley 1.
This commit is contained in:
Coen Rampen
parent
5e1905f5f6
commit
27e14762e7
4 changed files with 609 additions and 1 deletions
362
audio/casio.cpp
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362
audio/casio.cpp
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/* 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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#include "audio/casio.h"
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#include "common/config-manager.h"
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MidiDriver_Casio::ActiveNote::ActiveNote() {
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clear();
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}
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void MidiDriver_Casio::ActiveNote::clear() {
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source = 0x7F;
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channel = 0xFF;
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note = 0xFF;
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}
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const uint8 MidiDriver_Casio::INSTRUMENT_REMAPPING_CT460_TO_MT540[30] {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x0E, 0x0A, 0x07,
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0x09, 0x1B, 0x0F, 0x10, 0x11, 0x14, 0x08, 0x15, 0x0B, 0x0C,
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0x0D, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1C, 0x1D, 0x12, 0x13
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};
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const uint8 MidiDriver_Casio::INSTRUMENT_REMAPPING_MT540_TO_CT460[30] {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x09, 0x10, 0x0A,
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0x08, 0x12, 0x13, 0x14, 0x07, 0x0C, 0x0D, 0x0E, 0x1C, 0x1D,
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0x0F, 0x11, 0x15, 0x16, 0x17, 0x18, 0x19, 0x0B, 0x1A, 0x1B
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};
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const uint8 MidiDriver_Casio::RHYTHM_INSTRUMENT_MT540 = 0x10;
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const uint8 MidiDriver_Casio::RHYTHM_INSTRUMENT_CT460 = 0x0D;
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MidiDriver_Casio::MidiDriver_Casio(MusicType midiType) : _midiType(midiType), _driver(nullptr),
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_deviceType(MT_CT460), _isOpen(false), _rhythmNoteRemapping(nullptr) {
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if (!(_midiType == MT_MT540 || _midiType == MT_CT460)) {
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error("MidiDriver_Casio - Unsupported music data type %i", midiType);
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}
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Common::fill(_instruments, _instruments + ARRAYSIZE(_instruments), 0);
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}
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MidiDriver_Casio::~MidiDriver_Casio() {
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close();
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if (_driver) {
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_driver->setTimerCallback(nullptr, nullptr);
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delete _driver;
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_driver = nullptr;
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}
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}
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int MidiDriver_Casio::open() {
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assert(!_driver);
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// Detect the output device.
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MidiDriver::DeviceHandle dev = MidiDriver::detectDevice(MDT_MIDI | MDT_PREFER_GM);
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MusicType deviceMusicType = MidiDriver::getMusicType(dev);
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// System MIDI ports have type GM. This driver supports no other type.
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if (deviceMusicType != MT_GM)
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error("MidiDriver_Casio::open - Detected device has unsupported type %i", deviceMusicType);
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// Create the driver.
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MidiDriver *driver = MidiDriver::createMidi(dev);
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// Check the MIDI mode setting to determine if the device connected to the
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// system MIDI port is an MT-540 or a CT-460/CSM-1.
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int midiMode = ConfMan.getInt("midi_mode");
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MusicType deviceType;
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if (midiMode == 3) {
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deviceType = MT_MT540;
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} else if (midiMode == 4) {
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deviceType = MT_CT460;
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} else {
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error("MidiDriver_Casio::open - Unsupported MIDI mode %i", midiMode);
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}
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return open(driver, deviceType);
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}
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int MidiDriver_Casio::open(MidiDriver* driver, MusicType deviceType) {
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assert(!_driver);
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_driver = driver;
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_deviceType = deviceType;
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if (!(_deviceType == MT_MT540 || _deviceType == MT_CT460)) {
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error("MidiDriver_Casio::open - Unsupported device type %i", _deviceType);
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}
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if (!_driver)
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return 255;
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int result = _driver->open();
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if (result != MidiDriver::MERR_ALREADY_OPEN && result != 0) {
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return result;
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}
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// Initialize the device by setting the instrument to 0 on all channels.
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for (int i = 0; i < 4; i++) {
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programChange(i, 0, -1);
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}
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_timerRate = _driver->getBaseTempo();
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_driver->setTimerCallback(this, timerCallback);
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_isOpen = true;
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return 0;
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}
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void MidiDriver_Casio::close() {
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if (_driver && _isOpen) {
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stopAllNotes();
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_driver->close();
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_isOpen = false;
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}
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}
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bool MidiDriver_Casio::isOpen() const {
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return _isOpen;
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}
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void MidiDriver_Casio::send(int8 source, uint32 b) {
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byte dataChannel = b & 0xf;
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int8 outputChannel = source < 0 ? dataChannel : mapSourceChannel(source, dataChannel);
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if (outputChannel < 0 || outputChannel >= 4)
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// Only process events for channels 0-3.
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return;
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processEvent(source, b, outputChannel);
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}
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void MidiDriver_Casio::metaEvent(int8 source, byte type, byte *data, uint16 length) {
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assert(source < MAXIMUM_SOURCES);
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if (type == 0x2F && source >= 0) // End of Track
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deinitSource(source);
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_driver->metaEvent(type, data, length);
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}
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int8 MidiDriver_Casio::mapSourceChannel(uint8 source, uint8 dataChannel) {
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// TODO Multisource functionality has not been fully implemented. Current
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// implementation assumes 1 source with access to all channels.
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return dataChannel;
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}
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void MidiDriver_Casio::processEvent(int8 source, uint32 b, uint8 outputChannel) {
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assert(source < MAXIMUM_SOURCES);
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byte command = b & 0xF0;
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byte op1 = (b >> 8) & 0xFF;
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byte op2 = (b >> 16) & 0xFF;
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// The only commands supported by the Casio devices are note on, note off
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// and program change.
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switch (command) {
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case MIDI_COMMAND_NOTE_OFF:
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noteOff(outputChannel, command, op1, op2, source);
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break;
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case MIDI_COMMAND_NOTE_ON:
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noteOn(outputChannel, op1, op2, source);
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break;
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case MIDI_COMMAND_PROGRAM_CHANGE:
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programChange(outputChannel, op1, source);
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break;
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default:
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warning("MidiDriver_Casio::processEvent - Received unsupported event %02x", command);
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break;
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}
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}
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void MidiDriver_Casio::noteOff(byte outputChannel, byte command, byte note, byte velocity, int8 source) {
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// Apply rhythm note mapping.
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int8 mappedNote = mapNote(outputChannel, note);
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if (mappedNote < 0)
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// Rhythm note with no Casio equivalent.
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return;
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_mutex.lock();
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// Remove this note from the active note registry.
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for (int i = 0; i < ARRAYSIZE(_activeNotes); i++) {
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if (_activeNotes[i].channel == outputChannel && _activeNotes[i].note == mappedNote &&
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_activeNotes[i].source == source) {
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_activeNotes[i].clear();
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break;
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}
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}
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_mutex.unlock();
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_driver->send(command | outputChannel, mappedNote, velocity);
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}
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void MidiDriver_Casio::noteOn(byte outputChannel, byte note, byte velocity, int8 source) {
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if (velocity == 0) {
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// Note on with velocity 0 is a note off.
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noteOff(outputChannel, MIDI_COMMAND_NOTE_ON, note, velocity, source);
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return;
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}
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// Apply rhythm note mapping.
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int8 mappedNote = mapNote(outputChannel, note);
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if (mappedNote < 0)
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// Rhythm note with no Casio equivalent.
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return;
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_mutex.lock();
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// Add this note to the active note registry.
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for (int i = 0; i < ARRAYSIZE(_activeNotes); i++) {
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if (_activeNotes[i].note == 0xFF) {
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_activeNotes[i].channel = outputChannel;
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_activeNotes[i].note = mappedNote;
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_activeNotes[i].source = source;
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break;
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}
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}
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_mutex.unlock();
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byte calculatedVelocity = calculateVelocity(source, velocity);
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_driver->send(MIDI_COMMAND_NOTE_ON | outputChannel, mappedNote, calculatedVelocity);
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}
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int8 MidiDriver_Casio::mapNote(byte outputChannel, byte note) {
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int8 mappedNote = note;
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if (_rhythmNoteRemapping && isRhythmChannel(outputChannel)) {
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mappedNote = _rhythmNoteRemapping[note];
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if (mappedNote == 0)
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mappedNote = -1;
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}
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return mappedNote;
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}
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byte MidiDriver_Casio::calculateVelocity(int8 source, byte velocity) {
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byte calculatedVelocity = velocity;
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// Apply volume settings to velocity.
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if (source >= 0) {
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// Scale to source volume.
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calculatedVelocity = (velocity * _sources[source].volume) / _sources[source].neutralVolume;
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}
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if (_userVolumeScaling) {
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if (_userMute) {
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calculatedVelocity = 0;
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} else {
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// Scale to user volume.
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uint16 userVolume = _sources[source].type == SOURCE_TYPE_SFX ? _userSfxVolume : _userMusicVolume;
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calculatedVelocity = (calculatedVelocity * userVolume) >> 8;
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}
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}
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// Source volume scaling might clip volume, so reduce to maximum,
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return MIN(calculatedVelocity, static_cast<byte>(0x7F));
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}
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void MidiDriver_Casio::programChange(byte outputChannel, byte patchId, int8 source) {
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if (outputChannel < 4)
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// Register the new instrument.
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_instruments[outputChannel] = patchId;
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// Apply instrument mapping.
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byte mappedInstrument = mapInstrument(patchId);
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_driver->send(MIDI_COMMAND_PROGRAM_CHANGE | outputChannel | (mappedInstrument << 8));
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}
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byte MidiDriver_Casio::mapInstrument(byte program) {
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byte mappedInstrument = program;
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if (_instrumentRemapping)
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// Apply custom instrument mapping.
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mappedInstrument = _instrumentRemapping[program];
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// Apply MT-540 <> CT-460 instrument mapping if necessary.
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if (mappedInstrument < ARRAYSIZE(INSTRUMENT_REMAPPING_MT540_TO_CT460)) {
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if (_midiType == MT_MT540 && _deviceType == MT_CT460) {
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mappedInstrument = INSTRUMENT_REMAPPING_MT540_TO_CT460[mappedInstrument];
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} else if (_midiType == MT_CT460 && _deviceType == MT_MT540) {
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mappedInstrument = INSTRUMENT_REMAPPING_CT460_TO_MT540[mappedInstrument];
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}
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}
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return mappedInstrument;
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}
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bool MidiDriver_Casio::isRhythmChannel(uint8 outputChannel) {
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if (outputChannel >= 4)
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return false;
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// Check if the current instrument on the channel is the rhythm instrument.
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byte currentInstrument = mapInstrument(_instruments[outputChannel]);
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byte rhythmInstrument = _deviceType == MT_MT540 ? RHYTHM_INSTRUMENT_MT540 : RHYTHM_INSTRUMENT_CT460;
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return currentInstrument == rhythmInstrument;
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}
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void MidiDriver_Casio::stopAllNotes(bool stopSustainedNotes) {
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stopAllNotes(0xFF, 0xFF);
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}
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void MidiDriver_Casio::stopAllNotes(uint8 source, uint8 channel) {
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_mutex.lock();
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// Send note off events for all notes in the active note registry for this
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// source and channel.
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for (int i = 0; i < ARRAYSIZE(_activeNotes); i++) {
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if (_activeNotes[i].note != 0xFF && (source == 0xFF || _activeNotes[i].source == source) &&
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(channel == 0xFF || _activeNotes[i].channel == channel)) {
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noteOff(_activeNotes[i].channel, MIDI_COMMAND_NOTE_OFF, _activeNotes[i].note, 0, _activeNotes[i].source);
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}
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}
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_mutex.unlock();
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}
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void MidiDriver_Casio::applySourceVolume(uint8 source) {
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// Because the Casio devices do not support the volume controller, source
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// volume is applied to note velocity and it cannot be applied directly.
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}
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MidiChannel *MidiDriver_Casio::allocateChannel() {
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// MidiChannel objects are not supported by this driver.
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return nullptr;
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}
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MidiChannel *MidiDriver_Casio::getPercussionChannel() {
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// MidiChannel objects are not supported by this driver.
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return nullptr;
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}
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uint32 MidiDriver_Casio::getBaseTempo() {
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if (_driver) {
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return _driver->getBaseTempo();
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}
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return 0;
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}
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void MidiDriver_Casio::timerCallback(void *data) {
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MidiDriver_Casio *driver = static_cast<MidiDriver_Casio *>(data);
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driver->onTimer();
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}
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243
audio/casio.h
Normal file
243
audio/casio.h
Normal file
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@ -0,0 +1,243 @@
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/* 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_CASIO_H
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#define AUDIO_CASIO_H
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#include "audio/mididrv.h"
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#include "audio/mididrv_ms.h"
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/**
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* MIDI driver implementation for the Casio MT-540, CT-640 and CSM-1 devices.
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*
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* This driver provides source volume and user volume scaling, as well as
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* fades (due to device limitations these are applied to note velocity instead
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* of the volume controller). It also provides instrument mapping between the
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* MT-540 and CT-640/CSM-1 instrument map and can map rhythm notes from the
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* input MIDI data by specifying a remapping.
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*
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* TODO This driver does not provide a full multisource functionality
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* implementation because this was not needed for the game for which it was
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* added (Elvira). It assumes only 1 source sends MIDI data at the same time
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* and this source has access to all MIDI channels.
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*
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* Some details of these Casio devices:
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* - They seem to support only note on, note off and program change MIDI
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* events. Because they do not support the volume controller, volume is
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* applied to note velocity (and I'm not sure if they support even that...).
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* All Notes Off is performed by keeping track of active notes and sending
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* note off events for all active notes.
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* - They only use MIDI channels 0-3. The MT-32 and GM devices have channel 9
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* as the fixed rhythm channel. The Casio devices can switch any used channel
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* to a rhythm channel by setting a specific instrument.
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* - They have only 30 instruments, 3 of which are rhythm or SFX banks.
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* - All devices seem to have the same capabilities, but the instrument
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* numbering is different between the MT-540 on the one hand and the CT-640
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* and CSM-1 on the other.
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*/
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class MidiDriver_Casio : public MidiDriver_Multisource {
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protected:
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// Tracks a note currently playing on the device.
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struct ActiveNote {
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// The source that played the note (0x7F if no note is tracked).
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int8 source;
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// The output MIDI channel on which the note is playing
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// (0xFF if no note is tracked).
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uint8 channel;
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// The MIDI note number of the playing note
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// (0xFF if no note is tracked).
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uint8 note;
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ActiveNote();
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// Sets the struct to values indicating no note is currently tracked.
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void clear();
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};
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public:
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// Array for remapping instrument numbers from CT-460/CSM-1 to MT-540.
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static const uint8 INSTRUMENT_REMAPPING_CT460_TO_MT540[30];
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// Array for remapping instrument numbers from MT-540 to CT-460/CSM-1.
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static const uint8 INSTRUMENT_REMAPPING_MT540_TO_CT460[30];
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// The instrument number used for rhythm sounds on the MT-540.
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static const uint8 RHYTHM_INSTRUMENT_MT540;
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// The instrument number used for rhythm sounds on the CT-460 and CSM-1.
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static const uint8 RHYTHM_INSTRUMENT_CT460;
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/**
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* Constructs a new Casio MidiDriver instance.
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*
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* @param midiType The type of MIDI data that will be sent to the driver
|
||||
* (MT-540 or CT-460/CSM-1).
|
||||
*/
|
||||
MidiDriver_Casio(MusicType midiType);
|
||||
~MidiDriver_Casio();
|
||||
|
||||
int open() override;
|
||||
/**
|
||||
* Opens the driver wrapping the specified MidiDriver instance.
|
||||
*
|
||||
* @param driver The driver that will receive MIDI events from this driver.
|
||||
* @param deviceType The type of MIDI device that will receive MIDI events
|
||||
* from this driver (MT-540 or CT-460/CSM-1).
|
||||
* @return 0 if the driver was opened successfully; >0 if an error occured.
|
||||
*/
|
||||
virtual int open(MidiDriver *driver, MusicType deviceType);
|
||||
void close() override;
|
||||
bool isOpen() const override;
|
||||
|
||||
using MidiDriver_BASE::send;
|
||||
void send(int8 source, uint32 b) override;
|
||||
void metaEvent(int8 source, byte type, byte *data, uint16 length) override;
|
||||
|
||||
void stopAllNotes(bool stopSustainedNotes = false) override;
|
||||
MidiChannel *allocateChannel() override;
|
||||
MidiChannel *getPercussionChannel() override;
|
||||
uint32 getBaseTempo() override;
|
||||
|
||||
protected:
|
||||
/**
|
||||
* Maps a data MIDI channel to an output MIDI channel for the specified
|
||||
* source.
|
||||
* TODO This driver has no default implementation for a channel allocation
|
||||
* scheme. It assumes only one source is active at a time and has access to
|
||||
* all output channels. The default implementation for this method just
|
||||
* returns the data channel.
|
||||
*
|
||||
* @param source The source for which the MIDI channel should be mapped.
|
||||
* @param dataChannel The data channel that should be mapped.
|
||||
* @return The output MIDI channel.
|
||||
*/
|
||||
virtual int8 mapSourceChannel(uint8 source, uint8 dataChannel);
|
||||
/**
|
||||
* Processes a MIDI event.
|
||||
*
|
||||
* @param source The source sending the MIDI event.
|
||||
* @param b The MIDI event data.
|
||||
* @param outputChannel The MIDI channel on which the event should be sent.
|
||||
*/
|
||||
virtual void processEvent(int8 source, uint32 b, uint8 outputChannel);
|
||||
/**
|
||||
* Processes a MIDI note off event.
|
||||
*
|
||||
* @param outputChannel The MIDI channel on which the event should be sent.
|
||||
* @param command The MIDI command that triggered the note off event (other
|
||||
* than note off (0x80) this can also be note on (0x90) with velocity 0).
|
||||
* @param note The MIDI note that should be turned off.
|
||||
* @param velocity The note off velocity.
|
||||
* @param source The source sending the MIDI event.
|
||||
*/
|
||||
virtual void noteOff(byte outputChannel, byte command, byte note, byte velocity, int8 source);
|
||||
/**
|
||||
* Processes a MIDI note on event.
|
||||
*
|
||||
* @param outputChannel The MIDI channel on which the event should be sent.
|
||||
* @param note The MIDI note that should be turned on.
|
||||
* @param velocity The note velocity,
|
||||
* @param source The source sending the MIDI event.
|
||||
*/
|
||||
virtual void noteOn(byte outputChannel, byte note, byte velocity, int8 source);
|
||||
/**
|
||||
* Processes a MIDI program change event.
|
||||
*
|
||||
* @param outputChannel The MIDI channel on which the event should be sent.
|
||||
* @param patchId The instrument that should be set.
|
||||
* @param source The source sending the MIDI event.
|
||||
*/
|
||||
virtual void programChange(byte outputChannel, byte patchId, int8 source);
|
||||
|
||||
/**
|
||||
* Maps the specified note to a different note according to the rhythm note
|
||||
* mapping. This mapping is only applied if the note is played on a rhythm
|
||||
* channel.
|
||||
*
|
||||
* @param outputChannel The MIDI channel on which the note is/will be
|
||||
* active.
|
||||
* @param note The note that should be mapped.
|
||||
* @return The mapped note, or the specified note if it was not mapped.
|
||||
*/
|
||||
virtual int8 mapNote(byte outputChannel, byte note);
|
||||
/**
|
||||
* Calculates the velocity for a note on event. This applies source volume
|
||||
* and user volume settings to the specified velocity value.
|
||||
*
|
||||
* @param source The source that sent the note on event.
|
||||
* @param velocity The velocity specified in the note on event.
|
||||
* @return The calculated velocity.
|
||||
*/
|
||||
virtual byte calculateVelocity(int8 source, byte velocity);
|
||||
/**
|
||||
* Maps the specified instrument to the instrument value that should be
|
||||
* sent to the MIDI device. This applies the current instrument remapping
|
||||
* (if present) and maps MT-540 instruments to CT-460/CSM-1 instruments
|
||||
* (or the other way around) if necessary.
|
||||
*
|
||||
* @param program The instrument that should be mapped.
|
||||
* @return The mapped instrument, or the specified instrument if no mapping
|
||||
* was necessary.
|
||||
*/
|
||||
virtual byte mapInstrument(byte program);
|
||||
/**
|
||||
* Returns whether the specified MIDI channel is a rhythm channel. On the
|
||||
* Casio devices, the rhythm channel is not fixed but is created by setting
|
||||
* a channel to a specific instrument (see the rhythm instrument constants).
|
||||
*
|
||||
* @param outputChannel The channel that should be checked.
|
||||
* @return True if the specified channel is a rhythm channel, false
|
||||
* otherwise.
|
||||
*/
|
||||
bool isRhythmChannel(uint8 outputChannel);
|
||||
// This implementation does nothing, because source volume is applied to
|
||||
// note velocity and cannot be applied immediately.
|
||||
void applySourceVolume(uint8 source) override;
|
||||
void stopAllNotes(uint8 source, uint8 channel) override;
|
||||
|
||||
// The wrapped MIDI driver.
|
||||
MidiDriver *_driver;
|
||||
// The type of Casio device accessed by the wrapped driver: MT-540 or
|
||||
// CT-460/CSM-1.
|
||||
MusicType _deviceType;
|
||||
// The type of MIDI data supplied to the driver: MT-540 or CT-460/CSM-1.
|
||||
MusicType _midiType;
|
||||
// True if this MIDI driver has been opened.
|
||||
bool _isOpen;
|
||||
|
||||
// The current instrument on each MIDI output channel. This is the
|
||||
// instrument number as specified in the program change events (before
|
||||
// remapping is applied).
|
||||
byte _instruments[4];
|
||||
// Tracks the notes currently active on the MIDI device.
|
||||
ActiveNote _activeNotes[32];
|
||||
|
||||
// Optional remapping for rhythm notes. Should point to a 128 byte array
|
||||
// which maps the rhythm note numbers in the input MIDI data to the rhythm
|
||||
// note numbers used by the output device.
|
||||
byte *_rhythmNoteRemapping;
|
||||
|
||||
// Mutex for operations on active notes.
|
||||
Common::Mutex _mutex;
|
||||
|
||||
public:
|
||||
static void timerCallback(void *data);
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
@ -57,7 +57,9 @@ enum MusicType {
|
|||
MT_SEGACD, // SegaCD
|
||||
MT_GM, // General MIDI
|
||||
MT_MT32, // MT-32
|
||||
MT_GS // Roland GS
|
||||
MT_GS, // Roland GS
|
||||
MT_MT540, // Casio MT-540
|
||||
MT_CT460 // Casio CT-460 / CSM-1
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
|
|||
|
|
@ -4,6 +4,7 @@ MODULE_OBJS := \
|
|||
adlib.o \
|
||||
adlib_ms.o \
|
||||
audiostream.o \
|
||||
casio.o \
|
||||
fmopl.o \
|
||||
mididrv.o \
|
||||
mididrv_ms.o \
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue