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

Initial partial import.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio/java/TestLine.java	Wed Dec 19 22:38:28 2012 +0000
@@ -0,0 +1,63 @@
+package samer.audio.alt;
+import javax.sound.sampled.*;
+
+
+public class TestLine {
+	// Args: <dur> <freq in Hz> <bufsize> <framesize>
+	public static double TwoPi=2*Math.PI;
+
+	public static class SineSrc {
+		double ph,freq;
+
+		public SineSrc(double f) { freq=f; ph=0; }
+		public void next(double [] buf, int l) {
+			for (int i=0; i<l; i++) {
+				buf[i]=Math.sin(ph);
+				ph+=freq;
+			}
+			ph -= TwoPi*Math.floor(ph/TwoPi);
+		}
+	};
+
+	public static void main(String[] args) {
+		int bufsize, N, numframes;
+		double [] buffer;
+		double rate, dur, freq;
+
+		if (args.length<4) {
+			System.out.println("TestLine <dur> <freq in Hz> <bufsize> <framesize>");
+			return;
+		}
+
+		try {
+			dur=Double.parseDouble(args[0]);
+			freq=Double.parseDouble(args[1]);
+			bufsize=Integer.parseInt(args[2]);
+			N=Integer.parseInt(args[3]);
+			rate=22050;
+
+			System.out.println("Playing test signal: "+dur+" s, "+freq+"% Hz");
+			System.out.println("frame size="+N+" buffer size="+bufsize);
+
+			buffer = new double[N];
+			SineSrc src=new SineSrc(2*Math.PI*freq/rate);
+			LineSink sink=new LineSink(new AudioFormat((float)rate,16,1,true,false),bufsize);
+			try {
+				AudioSink.Writer w=sink.writer(N);
+				numframes = (int)(dur*rate/N);
+
+				sink.start();
+				for (int i=0; i<numframes; i++) {
+					src.next(buffer,N);
+					w.write(buffer,0,N);
+				}
+				sink.getLine().drain();
+				sink.stop();
+			} finally {
+				sink.dispose();
+			}
+		} catch(Exception ex) {
+		}
+	}
+}
+