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/*
* Copyright 2014 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.
*/
/**
* Generate steps, linear ramps and smooth ramps.
*
* @author (C) 2014 Phil Burk
*/
package com.jsyn.research;
import java.io.File;
import java.io.IOException;
import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.unitgen.ContinuousRamp;
import com.jsyn.unitgen.LineOut;
import com.jsyn.unitgen.LinearRamp;
import com.jsyn.unitgen.Multiply;
import com.jsyn.unitgen.PassThrough;
import com.jsyn.unitgen.PowerOfTwo;
import com.jsyn.unitgen.SawtoothOscillatorBL;
import com.jsyn.unitgen.UnitFilter;
import com.jsyn.unitgen.UnitOscillator;
import com.jsyn.util.WaveRecorder;
public class RecordVariousRamps {
private Synthesizer synth;
private UnitOscillator osc;
private Multiply multiplier;
private UnitFilter ramp;
private LinearRamp linearRamp;
private ContinuousRamp continuousRamp;
private LineOut lineOut;
private WaveRecorder recorder;
private PowerOfTwo powerOfTwo;
private static final int MODE_STEP = 0;
private static final int MODE_LINEAR = 1;
private static final int MODE_SMOOTH = 2;
private static final String[] modeNames = {
"step", "linear", "smooth"
};
private RampEvent[] rampData = {
new RampEvent(1.0, 1.5, 2.0), new RampEvent(-0.9, 0.5, 1.0),
new RampEvent(0.9, 0.5, 0.8), new RampEvent(-0.3, 0.5, 0.8),
new RampEvent(0.9, 0.5, 0.3), new RampEvent(-0.5, 0.5, 0.3),
new RampEvent(0.8, 2.0, 1.0),
};
private static class RampEvent {
double target;
double eventDuration;
double rampDuration;
RampEvent(double target, double eventDuration, double rampDuration) {
this.target = target;
this.eventDuration = eventDuration;
this.rampDuration = rampDuration;
}
}
private void test(int mode) throws IOException {
// Create a context for the synthesizer.
synth = JSyn.createSynthesizer();
synth.setRealTime(false);
File waveFile = new File("ramp_pitch_" + modeNames[mode] + ".wav");
// Mono 16 bits.
recorder = new WaveRecorder(synth, waveFile, 1, 16);
System.out.println("Writing to 16-bit WAV file " + waveFile.getAbsolutePath());
// Add some tone generators.
synth.add(osc = new SawtoothOscillatorBL());
// Add a controller that will sweep up.
synth.add(multiplier = new Multiply());
synth.add(powerOfTwo = new PowerOfTwo());
// Add an output unit.
synth.add(lineOut = new LineOut());
multiplier.inputB.set(660.0);
switch (mode) {
case MODE_STEP:
synth.add(ramp = new PassThrough());
break;
case MODE_LINEAR:
synth.add(ramp = linearRamp = new LinearRamp());
linearRamp.current.set(-1.0);
linearRamp.time.set(10.0);
break;
case MODE_SMOOTH:
synth.add(ramp = continuousRamp = new ContinuousRamp());
continuousRamp.current.set(-1.0);
continuousRamp.time.set(10.0);
break;
}
ramp.getInput().set(-1.0);
ramp.getOutput().connect(powerOfTwo.input);
powerOfTwo.output.connect(multiplier.inputA);
multiplier.output.connect(osc.frequency);
// Connect the oscillator to the left and right audio 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();
osc.output.connect(0, recorder.getInput(), 0);
// When we start the recorder it will pull data from the oscillator
// and sweeper.
recorder.start();
// We also need to start the LineOut if we want to hear it now.
lineOut.start();
// Get synthesizer time in seconds.
double nextEventTime = synth.getCurrentTime() + 1.0;
try {
synth.sleepUntil(nextEventTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
for (RampEvent rampEvent : rampData) {
switch (mode) {
case MODE_STEP:
break;
case MODE_LINEAR:
linearRamp.time.set(rampEvent.rampDuration);
break;
case MODE_SMOOTH:
continuousRamp.time.set(rampEvent.rampDuration);
break;
}
ramp.getInput().set(rampEvent.target);
nextEventTime += rampEvent.eventDuration;
System.out.println("target = " + rampEvent.target + ", rampDur = "
+ rampEvent.rampDuration + ", eventDur = " + rampEvent.eventDuration);
try {
synth.sleepUntil(nextEventTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
if (recorder != null) {
recorder.stop();
recorder.close();
}
// Stop everything.
synth.stop();
}
public static void main(String[] args) {
try {
new RecordVariousRamps().test(MODE_STEP);
new RecordVariousRamps().test(MODE_LINEAR);
new RecordVariousRamps().test(MODE_SMOOTH);
} catch (IOException e) {
e.printStackTrace();
}
}
}
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