samer@46: package ishara.audio;
samer@0: import javax.sound.sampled.*;
samer@0: 
samer@0: 
samer@0: public class TestLine {
samer@0: 	// Args: <dur> <freq in Hz> <bufsize> <framesize>
samer@0: 	public static double TwoPi=2*Math.PI;
samer@0: 
samer@0: 	public static class SineSrc {
samer@0: 		double ph,freq;
samer@0: 
samer@0: 		public SineSrc(double f) { freq=f; ph=0; }
samer@0: 		public void next(double [] buf, int l) {
samer@0: 			for (int i=0; i<l; i++) {
samer@0: 				buf[i]=Math.sin(ph);
samer@0: 				ph+=freq;
samer@0: 			}
samer@0: 			ph -= TwoPi*Math.floor(ph/TwoPi);
samer@0: 		}
samer@0: 	};
samer@0: 
samer@0: 	public static void main(String[] args) {
samer@0: 		int bufsize, N, numframes;
samer@0: 		double [] buffer;
samer@0: 		double rate, dur, freq;
samer@0: 
samer@0: 		if (args.length<4) {
samer@0: 			System.out.println("TestLine <dur> <freq in Hz> <bufsize> <framesize>");
samer@0: 			return;
samer@0: 		}
samer@0: 
samer@0: 		try {
samer@0: 			dur=Double.parseDouble(args[0]);
samer@0: 			freq=Double.parseDouble(args[1]);
samer@0: 			bufsize=Integer.parseInt(args[2]);
samer@0: 			N=Integer.parseInt(args[3]);
samer@0: 			rate=22050;
samer@0: 
samer@0: 			System.out.println("Playing test signal: "+dur+" s, "+freq+"% Hz");
samer@0: 			System.out.println("frame size="+N+" buffer size="+bufsize);
samer@0: 
samer@0: 			buffer = new double[N];
samer@0: 			SineSrc src=new SineSrc(2*Math.PI*freq/rate);
samer@0: 			LineSink sink=new LineSink(new AudioFormat((float)rate,16,1,true,false),bufsize);
samer@0: 			try {
samer@0: 				AudioSink.Writer w=sink.writer(N);
samer@0: 				numframes = (int)(dur*rate/N);
samer@0: 
samer@0: 				sink.start();
samer@0: 				for (int i=0; i<numframes; i++) {
samer@0: 					src.next(buffer,N);
samer@0: 					w.write(buffer,0,N);
samer@0: 				}
samer@0: 				sink.getLine().drain();
samer@0: 				sink.stop();
samer@0: 			} finally {
samer@0: 				sink.dispose();
samer@0: 			}
samer@0: 		} catch(Exception ex) {
samer@0: 		}
samer@0: 	}
samer@0: }
samer@0: