1 files changed, 65 insertions, 0 deletions
diff --git a/common/src/java/com/example/android/common/midi/synth/SawVoice.java b/common/src/java/com/example/android/common/midi/synth/SawVoice.java
new file mode 100644
index 00000000..3b3e543e
--- /dev/null
+++ b/common/src/java/com/example/android/common/midi/synth/SawVoice.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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.example.android.common.midi.synth;
+
+/**
+ * Sawtooth oscillator with an ADSR.
+ */
+public class SawVoice extends SynthVoice {
+    private SawOscillator mOscillator;
+    private EnvelopeADSR mEnvelope;
+
+    public SawVoice() {
+        mOscillator = createOscillator();
+        mEnvelope = new EnvelopeADSR();
+    }
+
+    protected SawOscillator createOscillator() {
+        return new SawOscillator();
+    }
+
+    @Override
+    public void noteOn(int noteIndex, int velocity) {
+        super.noteOn(noteIndex, velocity);
+        mOscillator.setPitch(noteIndex);
+        mOscillator.setAmplitude(getAmplitude());
+        mEnvelope.on();
+    }
+
+    @Override
+    public void noteOff() {
+        super.noteOff();
+        mEnvelope.off();
+    }
+
+    @Override
+    public void setFrequencyScaler(float scaler) {
+        mOscillator.setFrequencyScaler(scaler);
+    }
+
+    @Override
+    public float render() {
+        float output = mOscillator.render() * mEnvelope.render();
+        return output;
+    }
+
+    @Override
+    public boolean isDone() {
+        return mEnvelope.isDone();
+    }
+
+}