Audio.java

/*
 * Copyright (c) 2013, EPFL
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *   * Neither the name of the EPFL nor the names of its
 *     contributors may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

package net.sf.orcc.simulators.runtime.std.audio.impl;

import java.math.BigInteger;

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

/**
 * Audio native functions for the simulator
 * 
 * @author Malgorzata Wiszniewska
 * 
 */
public class Audio {

	private static final int BUFFER_SIZE = 128000;
	private static AudioFormat audioFormat;
	private static SourceDataLine line = null;
	private static DataLine.Info info;
	private static byte[] bdata = new byte[BUFFER_SIZE];
	private static int nBytesRead = 0;

	public static boolean audio_bufferFull() {
		if (nBytesRead == BUFFER_SIZE) {
			return true;
		} else {
			return false;
		}
	}

	public static void audio_close() {
		line.drain();
		line.close();
	}

	public static void audio_initAudioFormat(BigInteger SampleRate,
			BigInteger SampleSizeInBits, BigInteger Channels) {
		if (SampleSizeInBits.intValue() == 8) {
			audioFormat = new AudioFormat(SampleRate.floatValue(),
					SampleSizeInBits.intValue(), Channels.intValue(), false,
					false);
		} else {
			audioFormat = new AudioFormat(SampleRate.floatValue(),
					SampleSizeInBits.intValue(), Channels.intValue(), true,
					false);
		}
		info = new DataLine.Info(SourceDataLine.class, audioFormat);
		if (AudioSystem.isLineSupported(info)) {
			try {
				line = (SourceDataLine) AudioSystem.getLine(info);
				line.open(audioFormat);
			} catch (LineUnavailableException e) {
				e.printStackTrace();
				System.exit(1);
			} catch (Exception e) {
				e.printStackTrace();
				System.exit(1);
			}
		} else {
			System.out
					.println("Format of the file is incorrect (only 8 or 16 bits per sample are supported).");
		}
	}

	public static void audio_play() {
		int increment = ((nBytesRead % 4) == 0) ? 0 : 4 - (nBytesRead % 4);
		for (int i = 0; i < increment; i++) {
			bdata[nBytesRead + i] = (byte) 0;
		}
		line.start();
		line.write(bdata, 0, nBytesRead + increment);
		nBytesRead = 0;
		bdata = new byte[BUFFER_SIZE];
	}

	public static void audio_receive(BigInteger data) {
		bdata[nBytesRead] = data.byteValue();
		nBytesRead++;
	}
}