samer@0: /*
samer@0:  *	LineSink.java
samer@0:  *
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY;
samer@0:  *	without even the implied warranty of MERCHANTABILITY or
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@46: package ishara.audio;
samer@0: import  javax.sound.sampled.*;
samer@0: 
samer@0: /**
samer@0: 	An AudioSink that sends samples to a Java Sound SourceDataLine.
samer@0: 	Audio format can be determined in several ways (see below).
samer@0: 	<p> Object is a Viewable, and is called "lineout".
samer@0: 	Reads property "scale" from current environment, but scale
samer@0: 	can be adjusted afterwards.
samer@46: 	@see ishara.audio.AudioSink
samer@0: */
samer@0: 
samer@0: public class LineSink extends AudioSink
samer@0: {
samer@0: 	private SourceDataLine	line;
samer@0: 	private int 			bufsize;
samer@0: 
samer@0: 	public LineSink(AudioFormat f, int bufsize) throws Exception {
samer@0: 		this((SourceDataLine)AudioSystem.getLine(lineInfo(f,bufsize)),f,bufsize);
samer@0: 	}
samer@0: 
samer@0: 	public LineSink(SourceDataLine l, AudioFormat f, int bufsize) throws Exception {
samer@0: 		super(f); line=l; 
samer@0: 		if (bufsize==0) line.open(f); else line.open(f,bufsize);
samer@0: 		this.bufsize=line.getBufferSize();
samer@0: 	}
samer@0: 
samer@0: 	public void dispose() { 
samer@0: 		print("Closing audio input line.");
samer@0: 		try { line.close(); } 
samer@0: 		catch (Exception ex) { print("line failed to close: "+ex); } 
samer@0: 	}
samer@0: 
samer@0: 	public void start() { line.start(); }
samer@0: 	public void stop() { line.stop(); }
samer@0: 	public int  bwrite(byte [] buf, int off, int n) throws Exception { return line.write(buf,off,n); }
samer@0: 
samer@0: 	public DataLine getLine() { return line; }
samer@0: 	public void check() { print("LineSink samples in buffer: "+(bufsize-line.available())); }
samer@0: 	public String toString() { return "LineSink: "+getLine().getFormat(); }
samer@0: 
samer@0: 	public static DataLine.Info lineInfo(AudioFormat fmt) { return lineInfo(fmt,0); }
samer@0: 	public static DataLine.Info lineInfo(AudioFormat fmt, int bufsize) {
samer@0: 		if (bufsize==0)
samer@0: 			return new DataLine.Info( SourceDataLine.class, fmt); 
samer@0: 		else
samer@0: 			return new DataLine.Info( SourceDataLine.class, fmt, bufsize); 
samer@0: 	}
samer@0: }