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

import java.awt.Color;

// Note the name of the class in the following line MUST
// match the name of the file. 
public class Lect48b
{
  
  public static void main (String[] args) 
  {
    String fname = FileChooser.pickAFile();
    //System.out.println (fname);
    
    Sound s = new Sound (fname);
    
    System.out.println ("Number of samples in the sound: " + s.getLength());
    System.out.println ("Number of samples per second: " + s.getSamplingRate());
    
    double lengthInSeconds = s.getLength() / s.getSamplingRate();
   
    System.out.println ("The length in seconds of the sound: " + lengthInSeconds);
    
    increaseVolume (s);
    fadeIn (s, 4);
    
    s.explore();
    
 
   
  }
  
  // fade in over a 5 second period
  // fade in => gradually increase the volume of the sound from
  //             0 volume to regular volume.
  public static void fadeIn (Sound s)
  {
    SoundSample sampArr[] = s.getSamples();
    int index;
    int sampVal;
    double changeAmount;
    int numOfSeconds = 5;
    int sampleRate;
    int totalSamples;
    double deltaAmount;
    
    // determine the number of samples needed to manipulate
    sampleRate = (int)s.getSamplingRate();
    totalSamples = sampleRate * numOfSeconds;
    
    if (totalSamples > sampArr.length)
      totalSamples = sampArr.length;
      
    // determine the amount of volume change at each second
    deltaAmount = 1.0 / totalSamples;
    changeAmount = 10;
    
    System.out.println ("Number of samples in the sound: " + sampArr.length);
    for ( index = 0 ; index < totalSamples ; index++ )
    {
      sampVal = sampArr[index].getValue();
      changeAmount = deltaAmount * index;
      sampVal = (int) (sampVal * changeAmount);
      
      if (sampVal > 32767)
        sampVal = 32767;
      if (sampVal < -32768)
        sampVal = -32768;
      
      sampArr[index].setValue(sampVal);
    }
    
  }
  
  // fade in over the period of seconds indicated by the second parameter
  // fade in => gradually increase the volume of the sound from
  //             0 volume to regular volume.
  public static void fadeIn (Sound s, int numOfSeconds)
  {
    SoundSample sampArr[] = s.getSamples();
    int index;
    int sampVal;
    double changeAmount;
    //int numOfSeconds = 5;
    int sampleRate;
    int totalSamples;
    double deltaAmount;
    
    // determine the number of samples needed to manipulate
    sampleRate = (int)s.getSamplingRate();
    totalSamples = sampleRate * numOfSeconds;
    
    if (totalSamples > sampArr.length)
      totalSamples = sampArr.length;
      
    // determine the amount of volume change at each second
    deltaAmount = 1.0 / totalSamples;
    changeAmount = 10;
    
    System.out.println ("Number of samples in the sound: " + sampArr.length);
    for ( index = 0 ; index < totalSamples ; index++ )
    {
      sampVal = sampArr[index].getValue();
      changeAmount = deltaAmount * index;
      sampVal = (int) (sampVal * changeAmount);
      
      if (sampVal > 32767)
        sampVal = 32767;
      if (sampVal < -32768)
        sampVal = -32768;
      
      sampArr[index].setValue(sampVal);
    }
    
  }
 public static void increaseVolume (Sound s)
  {
    SoundSample sampArr[] = s.getSamples();
    int index;
    int sampVal;
    
    System.out.println ("Number of samples in the sound: " + sampArr.length);
    for ( index = 0 ; index < sampArr.length ; index++ )
    {
      sampVal = sampArr[index].getValue();
      sampVal = sampVal * 10;
      
      if (sampVal > 32767)
        sampVal = 32767;
      if (sampVal < -32768)
        sampVal = -32768;
      
      sampArr[index].setValue(sampVal);
    }
    
  }
} // end of class