//
//  nonstandard.java
//  nonstandard
//
//  Created by Nick Collins on 27/09/2006.

import java.util.*;
import javax.sound.sampled.*;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;

import java.lang.Math;

public class nonstandard {
	
    public static void main (String args[])
	throws	IOException 
{
	byte[]	data;
	AudioFormat	audioFormat;
	float	sr = 44100.0F;
	int SR = Math.round(sr);
	float	amp = 0.7F;
	//AudioFileFormat.Type	targetType = AudioFileFormat.Type.WAVE;
	
	int framelength= SR*5;
	float twopi = (float)(Math.PI *2.0);
	
	//1 second worth of bytes
	data = new byte[2*framelength];
	
	System.out.println("Creating waveform!");
	
	int reset=100, modulo=25;
	float divide= 12.5F;
	
	for( int i=0; i<framelength; ++i) {
		
		float val= ((float)Math.random())*2-1;
		
		if (Math.random()<0.0015) {
			reset=(int)Math.round(500*(Math.random())+10);
			modulo= Math.max((int)Math.round(reset/2),2);
			divide= (float)modulo*0.5F;
		}
		
		if ((i%reset)>4) 
			val = (float)(((Math.round((float)i+val))%modulo)/divide)-1;
		
		//test with just a sine, can comment out rest of random sound producing stuff above
		//float val= (float)Math.sin((float)i*440*twopi/sr);
		
		//convert to 16 bit audio
		int intval= (int)Math.round(32767.0*val);
		
		data[2*i]=(byte) (intval & 0xFF);
		data[2*i+1]= (byte) ((intval >>> 8) & 0xFF);
	}
	
	//now write data
	System.out.println("Outputting waveform!");
	
	String strFilename= "output.wav";
	
	File outputFile = new File(strFilename);
	
	//little Endian, Power PC is big endian,but not a big problem	
	audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
								  sr, 16, 1, 2, sr, false);			   
	
	
	AudioInputStream messy = new AudioInputStream(new ByteArrayInputStream(data),
												  audioFormat,
												  framelength);
	
	AudioSystem.write(messy, AudioFileFormat.Type.WAVE, outputFile);
	
}
}