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/*
* Copyright 2016 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.midi;
import com.jsyn.util.MultiChannelSynthesizer;
/**
* Map MIDI messages into calls to a MultiChannelSynthesizer. Handles CONTROLLER_MOD_WHEEL, TIMBRE,
* VOLUME and PAN. Handles Bend Range RPN.
*
* <pre>
* <code>
voiceDescription = DualOscillatorSynthVoice.getVoiceDescription();
multiSynth = new MultiChannelSynthesizer();
final int startChannel = 0;
multiSynth.setup(synth, startChannel, NUM_CHANNELS, VOICES_PER_CHANNEL, voiceDescription);
midiSynthesizer = new MidiSynthesizer(multiSynth);
// pass MIDI bytes
midiSynthesizer.onReceive(bytes, 0, bytes.length);
</code>
* </pre>
*
* See the example UseMidiKeyboard.java
*
* @author Phil Burk (C) 2016 Mobileer Inc
*/
public class MidiSynthesizer extends MessageParser {
private MultiChannelSynthesizer multiSynth;
public MidiSynthesizer(MultiChannelSynthesizer multiSynth) {
this.multiSynth = multiSynth;
}
@Override
public void controlChange(int channel, int index, int value) {
// LOGGER.debug("controlChange(" + channel + ", " + index + ", " + value + ")");
double normalized = value * (1.0 / 127.0);
switch (index) {
case MidiConstants.CONTROLLER_MOD_WHEEL:
double vibratoDepth = 0.1 * normalized;
multiSynth.setVibratoDepth(channel, vibratoDepth);
break;
case MidiConstants.CONTROLLER_TIMBRE:
multiSynth.setTimbre(channel, normalized);
break;
case MidiConstants.CONTROLLER_VOLUME:
multiSynth.setVolume(channel, normalized);
break;
case MidiConstants.CONTROLLER_PAN:
// convert to -1 to +1 range
multiSynth.setPan(channel, (normalized * 2.0) - 1.0);
break;
}
}
@Override
public void registeredParameter(int channel, int index14, int value14) {
switch (index14) {
case MidiConstants.RPN_BEND_RANGE:
int semitones = value14 >> 7;
int cents = value14 & 0x7F;
double bendRange = semitones + (cents * 0.01);
multiSynth.setBendRange(channel, bendRange);
break;
default:
break;
}
}
@Override
public void programChange(int channel, int program) {
multiSynth.programChange(channel, program);
}
@Override
public void channelPressure(int channel, int value) {
double normalized = value * (1.0 / 127.0);
multiSynth.setPressure(channel, normalized);
}
@Override
public void noteOff(int channel, int noteNumber, int velocity) {
multiSynth.noteOff(channel, noteNumber, velocity);
}
@Override
public void noteOn(int channel, int noteNumber, int velocity) {
multiSynth.noteOn(channel, noteNumber, velocity);
}
@Override
public void pitchBend(int channel, int bend) {
double offset = (bend - MidiConstants.PITCH_BEND_CENTER)
* (1.0 / (MidiConstants.PITCH_BEND_CENTER));
multiSynth.setPitchBend(channel, offset);
}
public void onReceive(byte[] bytes, int offset, int length) {
parse(bytes, offset, length);
}
}
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