SawVoice.java

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/*
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 * Copyright (C) 2015 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.common.midi.synth;
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/**
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 * Sawtooth oscillator with an ADSR.
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 */
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public class SawVoice extends SynthVoice {
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    private SawOscillator mOscillator;
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    private EnvelopeADSR mEnvelope;
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    public SawVoice() {
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        mOscillator = createOscillator();
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        mEnvelope = new EnvelopeADSR();
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    }
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    protected SawOscillator createOscillator() {
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        return new SawOscillator();
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    }
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    @Override
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    public void noteOn(int noteIndex, int velocity) {
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        super.noteOn(noteIndex, velocity);
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        mOscillator.setPitch(noteIndex);
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        mOscillator.setAmplitude(getAmplitude());
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        mEnvelope.on();
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    }
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    @Override
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    public void noteOff() {
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        super.noteOff();
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        mEnvelope.off();
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    }
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    @Override
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    public void setFrequencyScaler(float scaler) {
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        mOscillator.setFrequencyScaler(scaler);
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    }
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    @Override
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    public float render() {
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        float output = mOscillator.render() * mEnvelope.render();
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        return output;
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    }
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    @Override
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    public boolean isDone() {
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        return mEnvelope.isDone();
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    }
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}
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2014	2015	2016
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SawVoice.java
