diff audio/java/AudioSource.java @ 0:672052bd81f8

Initial partial import.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio/java/AudioSource.java	Wed Dec 19 22:38:28 2012 +0000
@@ -0,0 +1,73 @@
+/*
+ *	AudioSource.java	
+ *
+ *	Copyright (c) 2012, Samer Abdallah
+ *	All rights reserved.
+ *
+ *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
+ *	without even the implied warranty of MERCHANTABILITY or 
+ *	FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+package samer.audio.alt;
+import  javax.sound.sampled.AudioFormat;
+
+public abstract class AudioSource
+{
+	AudioFormat	format;
+
+	public AudioSource(AudioFormat f) { format=f; }
+
+	public AudioFormat getFormat() { return format; }
+
+	public abstract void   dispose();
+	public abstract void   start();
+	public abstract void   stop();
+	public abstract int    read(byte [] bbuf, int offset, int len) throws Exception;
+
+	public Reader reader(int len) { 
+		return new Reader(len,format.getSampleSizeInBits()/8); 
+	}
+
+	public class Reader {
+		byte[]  	 bbuf;
+		double[]  dbuf;
+		int       rem, numbytes, bps;
+		Converter conv;
+
+		public Reader(int numsamples, int bps) {
+			this.bps=bps;
+			numbytes=bps*numsamples;
+			bbuf=new byte[numbytes];
+			dbuf=new double[numsamples];
+			conv=getConverter(bbuf,dbuf,bps);
+			rem=0; 
+		}
+
+		public int unread() { return rem; }
+		public double[] next() throws Exception {
+			int rem=numbytes, pos=0;
+			while (rem>0) {
+				int bytesRead=read(bbuf, 0, rem);
+				if (bytesRead<=0) { this.rem=rem/bps; return dbuf; }
+				int count=bytesRead/bps;
+				conv.convert(pos,count);
+				pos+=count; rem-=bytesRead;
+			}
+			return dbuf;
+		}
+	}
+
+	protected interface Converter { public void convert(int pos, int count); }
+	protected static Converter getConverter(final byte [] bbuf,final double [] dbuf,final int bps) {
+		switch (bps) {
+			case 1: return new Converter() { public void convert(int pos, int count) { Util.byteToDouble(bbuf,dbuf,pos,count); } };
+			case 2: return new Converter() { public void convert(int pos, int count) { Util.shortToDouble(bbuf,dbuf,pos,count); } };
+			case 3: return new Converter() { public void convert(int pos, int count) { Util.mediumToDouble(bbuf,dbuf,pos,count); } };
+			case 4: return new Converter() { public void convert(int pos, int count) { Util.intToDouble(bbuf,dbuf,pos,count); } };
+		}
+		throw new Error("Unrecognised sample format");
+	}
+	public static void print(String msg) { System.out.println(msg); }
+}
+