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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 = getFramesToRead(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;
if (samplesRead < samplesToRead) break; // stream closed
}
framePosition += framesToRead;
transportModel.firePositionChanged(framePosition);
framesToRead = getFramesToRead(buffer);
}
transportModel.fireStateChanged(TransportModel.STATE_STOPPED);
} catch (IOException e) {
e.printStackTrace();
}
}
private int getFramesToRead(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;
}
}
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