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/*
* Copyright 2010 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.examples;
import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.data.SegmentedEnvelope;
import com.jsyn.ports.QueueDataCommand;
import com.jsyn.ports.QueueDataEvent;
import com.jsyn.ports.UnitDataQueueCallback;
import com.jsyn.unitgen.LineOut;
import com.jsyn.unitgen.SawtoothOscillatorBL;
import com.jsyn.unitgen.UnitOscillator;
import com.jsyn.unitgen.VariableRateDataReader;
import com.jsyn.unitgen.VariableRateMonoReader;
/**
* Use a UnitDataQueueCallback to notify us of the envelope's progress. Modulate the amplitude of an
* oscillator using a segmented envelope.
*
* @author Phil Burk (C) 2010 Mobileer Inc
*/
public class PlaySegmentedEnvelopeCallback {
private Synthesizer synth;
private UnitOscillator osc;
private LineOut lineOut;
private SegmentedEnvelope envelope;
private VariableRateDataReader envelopePlayer;
private void test() {
// Create a context for the synthesizer.
synth = JSyn.createSynthesizer();
// Add a tone generator.
synth.add(osc = new SawtoothOscillatorBL());
// Add an envelope player.
synth.add(envelopePlayer = new VariableRateMonoReader());
// Create an envelope consisting of (duration,value) pairs.
double[] pairs = {
0.1, 1.0, 0.2, 0.5, 0.6, 0.0
};
envelope = new SegmentedEnvelope(pairs);
// Add an output mixer.
synth.add(lineOut = new LineOut());
envelopePlayer.output.connect(osc.amplitude);
// Connect the oscillator to the output.
osc.output.connect(0, lineOut.input, 0);
osc.output.connect(0, lineOut.input, 1);
// Start synthesizer using default stereo output at 44100 Hz.
synth.start();
// We only need to start the LineOut. It will pull data from the other
// units.
lineOut.start();
try {
// Queue an envelope with callbacks.
QueueDataCommand command = envelopePlayer.dataQueue.createQueueDataCommand(envelope, 0,
envelope.getNumFrames());
// Create an object to be called when the queued data is done.
TestQueueCallback callback = new TestQueueCallback();
command.setCallback(callback);
command.setNumLoops(2);
envelopePlayer.rate.set(0.2);
synth.queueCommand(command);
synth.sleepFor(20.0);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Stop everything.
synth.stop();
}
class TestQueueCallback implements UnitDataQueueCallback {
@Override
public void started(QueueDataEvent event) {
System.out.println("CALLBACK: Envelope started.");
}
@Override
public void looped(QueueDataEvent event) {
System.out.println("CALLBACK: Envelope looped.");
}
@Override
public void finished(QueueDataEvent event) {
System.out.println("CALLBACK: Envelope finished.");
// Queue the envelope again at a faster rate.
// (If this hangs we may have hit a deadlock.)
envelopePlayer.rate.set(2.0);
envelopePlayer.dataQueue.queue(envelope);
}
}
public static void main(String[] args) {
new PlaySegmentedEnvelopeCallback().test();
}
}
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