117 lines
3.7 KiB
C++
117 lines
3.7 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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#include "audio/mididrv.h"
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#include "common/debug.h"
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#include "common/scummsys.h"
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#include "common/textconsole.h"
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#include "zvision/detection.h"
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#include "zvision/sound/midi.h"
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namespace ZVision {
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MidiManager::MidiManager() {
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MidiDriver::DeviceHandle dev = MidiDriver::detectDevice(MDT_MIDI | MDT_ADLIB);
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_driver = MidiDriver::createMidi(dev);
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if (_driver->open()) {
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warning("Can't open MIDI, no MIDI output!");
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_available = false;
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} else {
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Common::String driverName = MidiDriver::getDeviceString(dev, MidiDriver::DeviceStringType::kDriverName);
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Common::String deviceName = MidiDriver::getDeviceString(dev, MidiDriver::DeviceStringType::kDeviceName);
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_mt32 = MidiDriver::getMusicType(dev) == MT_MT32;
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debugC(1, kDebugSound, "MIDI opened, driver type: %s, device name: %s", driverName.c_str(), deviceName.c_str());
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_available = true;
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_maxChannels = _driver->MIDI_CHANNEL_COUNT;
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}
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}
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MidiManager::~MidiManager() {
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stop();
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_driver->close();
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delete _driver;
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}
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void MidiManager::send(uint8 status, uint8 data1, uint8 data2) {
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assert(status & 0x80 && "Malformed MIDI status byte");
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assert(!(data1 & 0x80) && "Malformed MIDI data byte 1");
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assert(!(data2 & 0x80) && "Malformed MIDI data byte 2");
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_driver->send(status | (data1 << 8) | (data2 << 16));
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}
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void MidiManager::stop() {
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for (uint8 i = 0; i < 16; i++)
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noteOff(i);
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}
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void MidiManager::noteOn(uint8 channel, uint8 note, uint8 velocity) {
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assert(channel <= 15);
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_activeChannels[channel].playing = true;
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_activeChannels[channel].note = note;
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send(0x90 | channel, note, velocity);
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debugC(1, kDebugSound, "MIDI note on, channel %d, note %d, velocity %d", channel, note, velocity);
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}
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void MidiManager::noteOff(uint8 channel) {
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assert(channel <= 15);
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if (_activeChannels[channel].playing) {
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_activeChannels[channel].playing = false;
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send(0x80 | channel, _activeChannels[channel].note);
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}
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}
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int8 MidiManager::getFreeChannel() {
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uint8 start = _mt32 ? 1 : 0; // MT-32 can be used for MIDI, but does not play anything on MIDI channel 0
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for (uint8 i = start; i < 16; i++)
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if (!_activeChannels[i].playing)
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return i;
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return -1;
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}
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void MidiManager::setVolume(uint8 channel, uint8 volume) {
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assert(channel <= 15);
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debugC(1, kDebugSound, "MIDI volume out %d", volume >> 1);
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send(0xB0 | channel, 0x07, volume >> 1);
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}
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void MidiManager::setBalance(uint8 channel, int8 balance) {
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assert(channel <= 15);
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uint8 _balance = (uint8)(balance + 128);
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debugC(1, kDebugSound, "MIDI balance out %d", _balance >> 1);
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send(0xB0 | channel, 0x08, _balance >> 1);
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}
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void MidiManager::setPan(uint8 channel, int8 pan) {
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assert(channel <= 15);
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uint8 _pan = (uint8)(pan + 128);
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debugC(1, kDebugSound, "MIDI pan in %d, out %d", pan, _pan >> 1);
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send(0xB0 | channel, 0x0A, _pan >> 1);
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}
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void MidiManager::setProgram(uint8 channel, uint8 prog) {
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assert(channel <= 15);
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send(0xC0 | channel, prog);
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}
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} // End of namespace ZVision
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