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/*
* Copyright 2011 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.instruments;
import com.jsyn.data.DoubleTable;
import com.jsyn.ports.UnitFunctionPort;
import com.jsyn.ports.UnitInputPort;
import com.jsyn.ports.UnitOutputPort;
import com.jsyn.unitgen.Circuit;
import com.jsyn.unitgen.EnvelopeDAHDSR;
import com.jsyn.unitgen.FunctionEvaluator;
import com.jsyn.unitgen.Multiply;
import com.jsyn.unitgen.SineOscillator;
import com.jsyn.unitgen.UnitOscillator;
import com.jsyn.unitgen.UnitVoice;
import com.jsyn.util.VoiceDescription;
import com.softsynth.math.ChebyshevPolynomial;
import com.softsynth.math.PolynomialTableData;
import com.softsynth.shared.time.TimeStamp;
/**
* Waveshaping oscillator with envelopes.
*
* @author Phil Burk (C) 2011 Mobileer Inc
*/
public class WaveShapingVoice extends Circuit implements UnitVoice {
private static final long serialVersionUID = -2704222221111608377L;
private static final int NUM_PRESETS = 3;
private UnitOscillator osc;
private FunctionEvaluator waveShaper;
private EnvelopeDAHDSR ampEnv;
private EnvelopeDAHDSR rangeEnv;
private Multiply frequencyScaler;
public UnitInputPort range;
public UnitInputPort frequency;
public UnitInputPort amplitude;
public UnitFunctionPort function;
public UnitInputPort pitchModulation;
// default Chebyshev polynomial table to share.
private static DoubleTable chebyshevTable;
private final static int CHEBYSHEV_ORDER = 11;
static {
// Make table with Chebyshev polynomial to share among voices
PolynomialTableData chebData = new PolynomialTableData(
ChebyshevPolynomial.T(CHEBYSHEV_ORDER), 1024);
chebyshevTable = new DoubleTable(chebData.getData());
}
public WaveShapingVoice() {
add(frequencyScaler = new Multiply());
add(osc = new SineOscillator());
add(waveShaper = new FunctionEvaluator());
add(rangeEnv = new EnvelopeDAHDSR());
add(ampEnv = new EnvelopeDAHDSR());
addPort(amplitude = ampEnv.amplitude);
addPort(range = osc.amplitude, "Range");
addPort(function = waveShaper.function);
addPort(frequency = frequencyScaler.inputA, "Frequency");
addPort(pitchModulation = frequencyScaler.inputB, "PitchMod");
ampEnv.export(this, "Amp");
rangeEnv.export(this, "Range");
function.set(chebyshevTable);
// Connect units.
osc.output.connect(rangeEnv.amplitude);
rangeEnv.output.connect(waveShaper.input);
ampEnv.output.connect(waveShaper.amplitude);
frequencyScaler.output.connect(osc.frequency);
// Set reasonable defaults for the ports.
pitchModulation.setup(0.1, 1.0, 10.0);
range.setup(0.1, 0.8, 1.0);
frequency.setup(osc.frequency);
amplitude.setup(0.0, 0.5, 1.0);
// Make the circuit turn off when the envelope finishes to reduce CPU load.
ampEnv.setupAutoDisable(this);
usePreset(2);
}
@Override
public UnitOutputPort getOutput() {
return waveShaper.output;
}
@Override
public void noteOn(double freq, double amp, TimeStamp timeStamp) {
frequency.set(freq, timeStamp);
amplitude.set(amp, timeStamp);
ampEnv.input.on(timeStamp);
rangeEnv.input.on(timeStamp);
}
@Override
public void noteOff(TimeStamp timeStamp) {
ampEnv.input.off(timeStamp);
rangeEnv.input.off(timeStamp);
}
@Override
public void usePreset(int presetIndex) {
int n = presetIndex % NUM_PRESETS;
switch (n) {
case 0:
ampEnv.attack.set(0.01);
ampEnv.decay.set(0.2);
ampEnv.release.set(1.0);
rangeEnv.attack.set(0.01);
rangeEnv.decay.set(0.2);
rangeEnv.sustain.set(0.4);
rangeEnv.release.set(1.0);
break;
case 1:
ampEnv.attack.set(0.5);
ampEnv.decay.set(0.3);
ampEnv.release.set(0.2);
rangeEnv.attack.set(0.03);
rangeEnv.decay.set(0.2);
rangeEnv.sustain.set(0.5);
rangeEnv.release.set(1.0);
break;
default:
ampEnv.attack.set(0.1);
ampEnv.decay.set(0.3);
ampEnv.release.set(0.5);
rangeEnv.attack.set(0.01);
rangeEnv.decay.set(0.2);
rangeEnv.sustain.set(0.9);
rangeEnv.release.set(1.0);
break;
}
}
static class MyVoiceDescription extends VoiceDescription {
static String[] presetNames = {
"FastChebyshev", "SlowChebyshev", "BrightChebyshev"
};
static String[] tags = {
"electronic", "waveshaping", "clean"
};
public MyVoiceDescription() {
super("Waveshaping", presetNames);
}
@Override
public UnitVoice createUnitVoice() {
return new WaveShapingVoice();
}
@Override
public String[] getTags(int presetIndex) {
return tags;
}
@Override
public String getVoiceClassName() {
return WaveShapingVoice.class.getName();
}
}
public static VoiceDescription getVoiceDescription() {
return new MyVoiceDescription();
}
}
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