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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/scummsys.h"
#include "zvision/core/midi.h"
namespace ZVision {
MidiManager::MidiManager() {
MidiDriver::DeviceHandle dev = MidiDriver::detectDevice(MDT_MIDI | MDT_ADLIB);
_driver = MidiDriver::createMidi(dev);
_driver->open();
}
MidiManager::~MidiManager() {
stop();
_driver->close();
delete _driver;
}
void MidiManager::stop() {
for (int8 i = 0; i < 16; i++)
if (_playChannels[i].playing)
noteOff(i);
}
void MidiManager::noteOn(int8 channel, int8 note, int8 velocity) {
assert(channel <= 15);
_playChannels[channel].playing = true;
_playChannels[channel].note = note;
_driver->send(channel | (velocity << 16) | (note << 8) | 0x90);
}
void MidiManager::noteOff(int8 channel) {
assert(channel <= 15);
if (_playChannels[channel].playing) {
_playChannels[channel].playing = false;
_driver->send(channel | (_playChannels[channel].note << 8) | 0x80);
}
}
int8 MidiManager::getFreeChannel() {
for (int8 i = 0; i < 16; i++)
if (!_playChannels[i].playing)
return i;
return -1;
}
void MidiManager::setPan(int8 channel, int8 pan) {
assert(channel <= 15);
_driver->send(channel | (pan << 16) | 0xAB0);
}
void MidiManager::setVolume(int8 channel, int8 volume) {
assert(channel <= 15);
_driver->send(channel | (volume << 16) | 0x7B0);
}
void MidiManager::setProgram(int8 channel, int8 prog) {
assert(channel <= 15);
_driver->send(channel | (prog << 8) | 0xC0);
}
} // End of namespace ZVision
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