/**
 * Class for creating a template for a simple Java program
 * 
 * @author Pat Troy: troy AT uic DOT edu
 */

// Note the name of the class in the following line MUST
// match the name of the file.  
public class Lect1122a
{
  
  public static void main (String[] args) 
  {
    System.out.println("Begin Java Exection");
    System.out.println("");


    // put your Java Program here
    String filename = FileChooser.pickAFile();
    Sound s = new Sound (filename);
    System.out.println ("S1 Length: " +  s.getLength());
    System.out.println ("S1 Sampling Rate: " +  s.getSamplingRate());
    System.out.println ("S1 Time: " +  s.getLength()/s.getSamplingRate());
    
    Sound s2;
    
    s2 = normalizeSound (s);
    
    System.out.println ("S2 length: " + s2.getLength());
    System.out.println ("S2 Sampling Rate: " +  s2.getSamplingRate());
    System.out.println ("S2 Time: " +  s2.getLength()/s2.getSamplingRate());
    s2.explore();
    

    Sound s3;
    
    s3 = decreasePitch (s2);
    
    System.out.println ("S3 length: " + s3.getLength());
    System.out.println ("S3 Sampling Rate: " +  s3.getSamplingRate());
    System.out.println ("S3 Time: " +  s3.getLength()/s3.getSamplingRate());
    
    s3.explore();

    System.out.println("");
    System.out.println("End Java Exection");
  }
  
  
   public static Sound decreasePitch (Sound s1)
  {
    //  add error check code here
    
    int l1 = s1.getLength();
    int l3 = s1.getLength()*2;
    
    
    Sound s3;
    s3 = new Sound (l3);
    
    SoundSample ssarray1[];
    SoundSample ssarray3[];
    int largest;
    int value1;
    int  i;
    
    ssarray1 = s1.getSamples();
    ssarray3 = s3.getSamples();
 
    
    for ( i = 0 ; i < l3 ; ++i )
    {
      value1 = ssarray1[i / 2].getValue();
      
      ssarray3[ i ].setValue(value1);
    }
    
    return s3;
  }

  
  
  
  public static Sound normalizeSound (Sound s1)
  {
    Sound s2;
    s2 = new Sound (s1.getLength());
    
    SoundSample ssarray1[];
    SoundSample ssarray2[];
    int largest;
    int value;
    int  i;
    double mult;
    
    ssarray1 = s1.getSamples();
    ssarray2 = s2.getSamples();
    
    // find the maximum value from the sound
    largest = 0;
    for ( i = 0 ; i < s1.getLength() ; ++i )
    {
      value = ssarray1[i].getValue();
      
      if (value > largest)
      {
        largest = value;
      }      
    }
    
    System.out.println ("Largest: " + largest);
    
    // deterrmine the multiplier
    mult = 32767.0/largest;
    
    for ( i = 0 ; i < s1.getLength() ; ++i )
    {
      value = ssarray1[i].getValue();
      value = (int)(value * mult);
      
      if (value > 32767)
      {
        value = 32767;
      }
      if (value < -32768)
      {
        value = -32768;
      }
      
      ssarray2[i].setValue(value);
    }
    
    return s2;
  }
  
} // end of Template class