SpeechDataSender.java

/*
  SpeechDataSender.java

  (c) 2012-2013 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.engine.speech.encode;

import java.io.IOException;
import java.io.OutputStream;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;

import v9t9.common.speech.ISpeechDataSender;

/**
 * @author ejs
 *
 */
public class SpeechDataSender implements ISpeechDataSender {
	/**
	 * 
	 */
	private  OutputStream fos;
	private byte[] speechWaveForm;
	private int speechIdx;

	private SourceDataLine speechLine;
	/**
	 * @param fos
	 * @throws LineUnavailableException 
	 */
	public SpeechDataSender(int hertz, int framesPerSecond) throws LineUnavailableException {
		speechWaveForm = new byte[hertz / framesPerSecond * 2];
		speechIdx = 0;
		
		AudioFormat speechFormat = new AudioFormat(hertz, 16, 1, true, false);
		Line.Info spInfo = new DataLine.Info(SourceDataLine.class,
				speechFormat);
		if (!AudioSystem.isLineSupported(spInfo)) {
			System.err.println("Line not supported: " + speechFormat);
			System.exit(1);
		}
		
		
		int speechFramesPerTick = (int) (speechFormat.getFrameRate() / 100);
		speechLine = (SourceDataLine) AudioSystem.getLine(spInfo);
		speechLine.open(speechFormat, speechFramesPerTick * 10);
		speechLine.start();
		
		
	}
	
	/**
	 * @param fos the fos to set
	 */
	public void setOutputStream(OutputStream fos) {
		this.fos = fos;
	}

	public void sendSample(short val, int pos, int length) {
		
		//val ^= 0x8000;
		if (speechIdx >= speechWaveForm.length) {
			speechLine.write(speechWaveForm, 0, speechWaveForm.length);
			speechIdx = 0;
		}
		speechWaveForm[speechIdx++] = (byte) (val & 0xff);
		speechWaveForm[speechIdx++] = (byte) (val >> 8);
		
		if (fos != null) {
			try {
				fos.write(val & 0xff);
				fos.write(val >> 8);
			} catch (IOException e) {
			}
		}
//				if (pos == 0)
//					System.out.println();
//				System.out.print(val + " ");
	}

	/* (non-Javadoc)
	 * @see v9t9.common.speech.ISpeechDataSender#speechDone()
	 */
	@Override
	public void speechDone() {
		System.out.println("\n// done");
		

		speechLine.write(speechWaveForm, 0, speechIdx);
		speechLine.flush();
		
	}
}