1 files changed, 121 insertions, 0 deletions
diff --git a/src/com/jsyn/util/StreamingThread.java b/src/com/jsyn/util/StreamingThread.java
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+++ b/src/com/jsyn/util/StreamingThread.java
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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.util;
+
+import java.io.IOException;
+
+import com.jsyn.io.AudioInputStream;
+import com.jsyn.io.AudioOutputStream;
+
+/**
+ * Read from an AudioInputStream and write to an AudioOutputStream as a background thread.
+ * 
+ * @author Phil Burk (C) 2011 Mobileer Inc
+ */
+public class StreamingThread extends Thread {
+    private AudioInputStream inputStream;
+    private AudioOutputStream outputStream;
+    private int framesPerBuffer = 1024;
+    private volatile boolean go = true;
+    private TransportModel transportModel;
+    private long framePosition;
+    private long maxFrames;
+    private int samplesPerFrame = 1;
+
+    public StreamingThread(AudioInputStream inputStream, AudioOutputStream outputStream) {
+        this.inputStream = inputStream;
+        this.outputStream = outputStream;
+    }
+
+    @Override
+    public void run() {
+        double[] buffer = new double[framesPerBuffer * samplesPerFrame];
+        try {
+            transportModel.firePositionChanged(framePosition);
+            transportModel.fireStateChanged(TransportModel.STATE_RUNNING);
+            int framesToRead = geteFramesToRead(buffer);
+            while (go && (framesToRead > 0)) {
+                int samplesToRead = framesToRead * samplesPerFrame;
+                while (samplesToRead > 0) {
+                    int samplesRead = inputStream.read(buffer, 0, samplesToRead);
+                    outputStream.write(buffer, 0, samplesRead);
+                    samplesToRead -= samplesRead;
+                }
+                framePosition += framesToRead;
+                transportModel.firePositionChanged(framePosition);
+                framesToRead = geteFramesToRead(buffer);
+            }
+            transportModel.fireStateChanged(TransportModel.STATE_STOPPED);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private int geteFramesToRead(double[] buffer) {
+        if (maxFrames > 0) {
+            long numToRead = maxFrames - framePosition;
+            if (numToRead < 0) {
+                return 0;
+            } else if (numToRead > framesPerBuffer) {
+                numToRead = framesPerBuffer;
+            }
+            return (int) numToRead;
+        } else {
+            return framesPerBuffer;
+        }
+    }
+
+    public int getFramesPerBuffer() {
+        return framesPerBuffer;
+    }
+
+    /**
+     * Only call this before the thread has started.
+     * 
+     * @param framesPerBuffer
+     */
+    public void setFramesPerBuffer(int framesPerBuffer) {
+        this.framesPerBuffer = framesPerBuffer;
+    }
+
+    public void requestStop() {
+        go = false;
+    }
+
+    public TransportModel getTransportModel() {
+        return transportModel;
+    }
+
+    public void setTransportModel(TransportModel transportModel) {
+        this.transportModel = transportModel;
+    }
+
+    /**
+     * @param maxFrames
+     */
+    public void setMaxFrames(long maxFrames) {
+        this.maxFrames = maxFrames;
+    }
+
+    public int getSamplesPerFrame() {
+        return samplesPerFrame;
+    }
+
+    public void setSamplesPerFrame(int samplesPerFrame) {
+        this.samplesPerFrame = samplesPerFrame;
+    }
+}