audio visualization graphics

[Yahya Elyasse]

hi guys,

i have an application for a java audio player.i want to add a simple way of indicating that the audio system is active.

For instance, if you open Windows Media player and choose Bars and Waves Visualization, you will see what I am saying.
http://www.microsoft.com/windows/windowsmedia/images/howto/visualizations_sampleinFull.gif shows a simple visualization from Media Player.

how can i implement /imitate this visualization using java code ?
thanks

[Andrei Matyas]

You can find 3 usefull classes (JavaSound.java, JavaSoundException.java, SoundView.java) at http://coweb.cc.gatech.edu/mediaComp-plan/49. It works fine with 'wav', 'au' or 'aiff' files.

[Yahya Elyasse]

thanks Andrei

it seems the link doesn't work .i can't display the web page.

thanks for helping

[Andrei Matyas]

It works for me

   
import javax.sound.sampled.*;
import java.io.*;
import java.util.Vector;
 
/**
 * The <code>JavaSound</code> class is an Implementation of the 
 * <a href = "http://java.sun.com/products/java-media/sound/index.html">
 * Java Sound API </a> specifically designed for use with the Jython 
 * Environment for Students (JES).
 * <p>
 * This class allows for easy playback, and manipulation of AU, AIFF, and 
 * WAV files.
 * <p>
 * Note that EVERYTHING in this file is 0-indexed.  (Since we want JES to
 * use a 1-based indexing system for sounds, the media.py file contains 
 * wrappers for all of these functions that translate between the 0 and 1
 * based systems).  Except error messages, they are 1-indexed so that JES
 * can catch them and make sense of it all.
 *
 * @author Ellie Harmon, [e-mail]
 */
 

/* Lots of code & ideas for this class related to  playing and 
 * viewing the sound were borrowed from the Java Sound Demo:
 * <a href="http://java.sun.com/products/java-media/sound/samples/JavaSoundDemo/" target="_blank" rel="nofollow">http://java.sun.com/products/java-media/sound/samples/JavaSoundDemo/</a>
 *
 * Also, some code borrowed from Tritonus as noted.
 */
 
/*
 * Copyright (c) 1999 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */
 

public class JavaSound{
    
    /**************************************************************************/
    /********************************** FIELDS ********************************/
    /**************************************************************************/
 
    /**
     * A default buffer size.
     * @see JavaSound#JavaSound()
     * @see Playback#run()
     */
    private static final int BUFFER_SIZE = 16384;
 
    /**
     * Are we in debug mode?
     */
    private static final boolean DEBUG = false;
    
    /**
     * An array of bytes representing the sound.
     */
    private byte[] buffer;
    
    /**
     * Contains information about this sound such as its length, 
     * format, and type.
     * @see AudioFormat
     */
    private AudioFileFormat audioFileFormat;
    
    /**
     * A collection of the threads that are playing this sound.
     */
    private Vector playbacks;
 
    /**
     * The view for this sound, if it exists. If it exists, this becomes
     * the LineListener for output lines in the Playback class.
     * @see Playback
     */
    private SoundView soundView;
 
    /**
     * The name of the file from which this sound was created.  Gets
     * updated every time load from file is called.
     * @see #loadFromFile
     */
    private String fileName;
    
    /**************************************************************************/
    /****************************** ACCESSORS *********************************/
    /**************************************************************************/
 
    /**
     * Obtains the byte array representation of this sound.
     *
     * @return     the sound represented as a byte array
     */
    public byte[] getBuffer()
    {
return buffer;
    }
 
    /**
     * Obtains the AudioFileFormat describing this sound.
     *
     * @return the AudioFileFormat describing this sound
     * @see AudioFileFormat
     */
    public AudioFileFormat getAudioFileFormat()
    {
return audioFileFormat;
    }
    
    /**
     * @see JavaSound#getBuffer
     */
    public byte[] asArray()
    {
return getBuffer();
    }
 
    /**
     * Obtains the collection of playback threads currently active
     * on this sound.
     */
    public Vector getPlaybacks()
    {
return playbacks;
    }
    
    /**
     * Obtains the name of the file this sound came from.  If this sound
     * did not orriginate with a file, this value will be null.
     * @see #loadFromFile(String fileName)
     */
    public String getFileName()
    {
return fileName;
    }

    /**************************************************************************/
    /******************************** MODIFIERS********************************/
    /**************************************************************************/
    
    /**
     * Changes the byte array that represents this sound. 
     *
     * @param newBuffer a byte array representation of the new sound we
     * want this to represent.
     */
    public void setBuffer(byte[] newBuffer)
    {
buffer = newBuffer;
    }
        
    /**
     * Changes the AudioFileFormat of this sound.
     *
     * @param newAudioFileFormat the new audioFileFormat that describes 
     * this sound.
     * @see AudioFileFormat
     */
    public void setAudioFileFormat(AudioFileFormat newAudioFileFormat)
    {
audioFileFormat = newAudioFileFormat;
    }
 
    /**
     * Changes the view of this object.
     * @see #soundView
     */
    public void setSoundView(SoundView soundView)
    {
this.soundView = soundView;
    }
    
    /**************************************************************************/
    /******************************** CONSTRUCTORS ****************************/
    /**************************************************************************/
    
    /**
     * Constructs a <code>JavaSound</code> of 3 seconds long.
     * @see JavaSound#JavaSound(int numSeconds)
     */
    public JavaSound()
    {
this(3);
    }
    
    /**
     * Constructs a <code>JavaSound</code> of the specified length.
     * This sound will simply consist of an empty byte array, and an
     * <code>AudioFileFormat</code> with the following values:
     * <ul> 
     * <li><code>AudioFileFormat.Type.WAVE</code>
     * <li>22.05K sampling rate
     * <li>16 bit sample
     * <li>1 channel
     * <li>signed PCM encoding
     * <li>small-endian byte order
     * </ul>
     * Note that no new sound file is created, we only represent the sound
     * with a buffer and the AudioFileFormat.  If a file is desired, then 
     * the method <code>writeToFile(String filename)</code> must
     * be called on this newly created sound.
     *
     * @param numSeconds The length, in seconds, for the new sound
     * @see JavaSound#writeToFile(String filename)
     */
    public JavaSound(int numSeconds)
    {
/* 
   Make a new sound with 22.05K sampling, 16 bits, 
   1 channel(==1 sample/frame), signed, smallEndian 
*/
AudioFormat audioFormat = new AudioFormat(22050, 16, 1, true, false);
 
/*
  (samples/sec)/channel * channels * sec * bytes/sample = bytes
*/
int lengthInBytes = 22050 * 1* numSeconds * 2;

/* 
   Make a new WAV file format, with the AudioFormat described above 
   lengthInFrames = lengthInBytes/frameSizeInBytes
   
   note : frame size is number of bytes required to contain one sample
   from each channel:
   in this case:  2 bytes/sample * 1 sample/frame = 2 bytes/frame
*/
audioFileFormat = new AudioFileFormat(AudioFileFormat.Type.WAVE, 
      audioFormat, lengthInBytes/(2));
 
buffer = new byte[lengthInBytes];
playbacks = new Vector();
    }
 

    public JavaSound(int sampleSizeInBits, boolean isBigEndian)
    {
AudioFormat audioFormat = new AudioFormat(22050, sampleSizeInBits, 2,
  true, isBigEndian);
 
int lengthInBytes = 22050*2*5*(sampleSizeInBits/8);

audioFileFormat = new AudioFileFormat(AudioFileFormat.Type.WAVE,
      audioFormat, 
      lengthInBytes/(sampleSizeInBits/8*2));

buffer = new byte[lengthInBytes];
playbacks = new Vector();
    }
    
    /**
     * Constructs a new JavaSound from the given file.
     *
     * @param fileName The File from which to create this sound.
     * @see JavaSound#loadFromFile(String filename)
     * @throws JavaSoundException if there are problems loading the file
     */
    public JavaSound(String fileName) throws JavaSoundException
    { 
loadFromFile(fileName);
playbacks = new Vector();
    }
 
    /**************************************************************************/
    /*********************************** MISC**********************************/
    /**************************************************************************/
    
    /**
     * Creates an <code>AudioInputStream</code> for this sound from the 
     * <code>buffer</code> and the <code>audioFileFormat</code>.
     *
     * @return an AudioInputStream representing this sound.
     * @see AudioInputStream
     */
    public AudioInputStream makeAIS()
    {
AudioFileFormat.Type fileType = audioFileFormat.getType();
ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
int frameSize = audioFileFormat.getFormat().getFrameSize();

AudioInputStream audioInputStream = 
    new AudioInputStream(bais, audioFileFormat.getFormat(), 
 buffer.length/frameSize);
return audioInputStream;
    }//makeAIS
 
    /**
     * Invokes <code>printError(message, null)</code>
     * 
     * @see JavaSound#printError(String message, Exception e)
     * @throws JavaSoundException Will throw under every circumstance.
     *                            This way we can catch the exception
     *                            in JES.
     */
    public void printError(String message) throws JavaSoundException
    {
printError(message, null);
    }
 
    /**
     * Prints the given String to the "standard" error output stream, then
     * prints a stack trace on the exception, and then exits the program.  If 
     * the String is null, then nothing happens, the method just returns.  If 
     * the Exception is null, then it prints the String and then exits the 
     * program.
     *
     * @param message A description of the error
     * @param e The exception, if any, that was caught regarding the error
     * @throws JavaSoundException Will throw under every circumstance.
     *                            This way we can catch the exception
     *                            in JES.
     */
    public void printError(String message, Exception e) throws JavaSoundException
    {
if(message != null)
    {
System.err.println(message);
if(e != null)
    {
e.printStackTrace();
    }
//so we can catch the error in JES
throw(new JavaSoundException(message));
    }
    }
 
    
    public boolean isStereo()
    {
if(audioFileFormat.getFormat().getChannels() == 1)
    return false;
else
    return true;
    }
 
    /**************************************************************************/
    /**************************** FILE INPUT/OUTPUT ***************************/
    /**************************************************************************/
 
    /**
     * Creates an audioInputStream from this sound, and then writes this
     * stream out to the file with the specified name.  If no file exists, 
     * one is created.  If a file already exists, then it is overwritten.
     * Does not check the extension of the fileName passed in to make sure
     * it agrees with the <code>AudioFileFormat.Type</code> of this sound.
     *
     * @param outFileName The name of the file to write this sound to
     * @throws JavaSoundException if any error is encountered while writing
     *                            to the file.
     */
    public void writeToFile(String outFileName) throws JavaSoundException
    {
 
/*
  get an audioInputStream that represents this sound.
  then, we will write from the stream to the file
*/
AudioInputStream audioInputStream = makeAIS();
AudioFileFormat.Type type = audioFileFormat.getType();

try
    {
audioInputStream.reset();
    }//try reset audioInputStream
catch(Exception e)
    {
printError("Unable to reset the Audio stream.  Please "+
   "try again.", e);
    }//catch
 

//get the file to write to
File file = new File(outFileName);
if(!file.exists())
    {
//if the file doesn't exist, make one
try
    {
file.createNewFile();
    }//try
catch(IOException e)
    {
printError("That file does not already exist, and"+
   "there were problems creating a new file" +
   "of that name.  Are you sure the path" +
   "to: " + outFileName + "exists?", e);
    }//catch
    }//if


//write to the file
try
    {
if(AudioSystem.write(audioInputStream, type, file) == -1)
    { 
printError("Problems writing to file.  Please " +
   "try again.");
    } 
    }//try
catch(FileNotFoundException e)
    {
printError("The file you specified did not already exist " +
   "so we tried to create a new one, but were unable"+
   "to do so.  Please try again.  If problems persist"+
   "see your TA.", e);
    }
catch(Exception e)
    { 
printError("Problems writing to file: " + outFileName, e);
    }//catch

 
//cloe the input stream, we're done writing
try
    {
audioInputStream.close();
    }//try
catch(Exception e)
    {
printError("Unable to close the Audio stream.");
    }//catch

    }//writeToFile(String outFileName)
   
 
    /**
     * Resets the fields of this sound so that it now represents the sound
     * in the specified file.  If successful, the fileName variable is updated 
     * such that it is equivalent to <code>inFileName</code>.
     *
     * @param inFileName the path and filename of the sound we want to 
     *                   represent.
     * @throws JavaSoundException if any problem is encountered while
     *                            reading in from the file.
     */
    public void loadFromFile(String inFileName) throws JavaSoundException
    {

//try to catch the NullPointerException before it occurs
if(inFileName == null)
    {
printError("You must pass in a valid file name.  Please try" +
   "again.");
    }

/*
  get the File object representing the file named inFileName and
  make sure it exists
*/
File file = new File(inFileName);
if(!file.exists())
    {
printError("The file: " + inFileName + " doesn't exist");
    }
 
/*
  create an audioInputStream from this file
*/
AudioInputStream audioInputStream;
try
    {
audioInputStream = AudioSystem.getAudioInputStream(file);
    }
catch(Exception e)
    {
printError("Unable to create Audio Stream from file " + 
   inFileName + ".  The file type is unsupported.  " + 
   "Are you sure you're using a WAV, AU, or" +
   "AIFF file?" , e);
return;
    }//catch


/*
  We need to make an array representing this sound, so the number
  of bytes we will be storing cannot be greater than Integer.MAX_VALUE
  The JavaSound API also supports only integer length frame lengths.
  (See AudioFileFormat.getFrameLength().  I don't know why this is 
  inconsistent with AudioInputStream.getFrameLength().)
*/
if((audioInputStream.getFrameLength() * 
    audioInputStream.getFormat().getFrameSize()) > Integer.MAX_VALUE)
    {
printError("The sound in file: " + inFileName + " is too long."+
   "  Try using a shorter sound.");
    }
int bufferSize = (int)audioInputStream.getFrameLength() *
    audioInputStream.getFormat().getFrameSize();

buffer = new byte[bufferSize];

int numBytesRead = 0;
int offset = 0;

//read all the bytes into the buffer
while(true)
    {
try
    {
numBytesRead = 
    audioInputStream.read(buffer, offset, bufferSize);
if(numBytesRead == -1)//no more data
    break;
else
    offset += numBytesRead;
    }//try
catch(Exception e)
    {
printError("Problems reading the input stream.  "+
   "You might want to try again using this "+
   " file: " + inFileName + "or a different"+ 
   " file.  If problems persist, ask your TA."
   , e);
    }//catch
    }//while


/*
  set the format of the file, assuming that the extension is correct
*/
if(inFileName.toLowerCase().endsWith(".wav"))
    {
audioFileFormat = 
    new AudioFileFormat(AudioFileFormat.Type.WAVE,
audioInputStream.getFormat(),
(int)audioInputStream.getFrameLength());
    }
else if(inFileName.toLowerCase().endsWith(".au"))
    {
audioFileFormat = 
    new AudioFileFormat(AudioFileFormat.Type.AU,
audioInputStream.getFormat(),
(int)audioInputStream.getFrameLength());
    }
else if (inFileName.toLowerCase().endsWith(".aif")||
 inFileName.toLowerCase().endsWith(".aiff"))
    {
audioFileFormat = 
    new AudioFileFormat(AudioFileFormat.Type.AIFF,
audioInputStream.getFormat(),
(int)audioInputStream.getFrameLength());
    }
else
    {
printError("Unsupported file type.  Please try again with a "+
   "file that ends in .wav, .au, .aif, or .aiff");
    }

if(DEBUG)
    {
System.out.println("New sound created from file: " + fileName);
System.out.println("\tendianness: " + audioInputStream.getFormat().isBigEndian());
System.out.println("\tencoding: " + audioInputStream.getFormat().getEncoding());
    }

this.fileName = file.getName();
 
    }//loadFromFile(String inFileName)
    
    /**************************************************************************/
    /******************************** PLAYING *********************************/
    /**************************************************************************/
 
    /**
     * Creates a new Playback thread and starts it.   The thread is guarranteed
     * to finish playing the sound as long as the program doesn't exit before it
     * is done.  This method does not block, however.  So, if you invoke
     * <code>play()</code> multiple times in a row, sounds will simply play on 
     * top of eachother - "accidental mixing"
     *
     * @see Playback
     */
    public void play()
    {
/*
  create the thread, add it to the Vector, and start it
*/
Playback playback = new Playback();
playbacks.add(playback);
playback.start();
    }
    
    /**
     * Creates a new Playback thread, starts it, then waits for the entire sound 
     * to finish playing before it returns.  This method is guarranteed to play 
     * the entire sound, and does not allow for any "accidental mixing"
     *
     * @see Playback
     */
    public void blockingPlay()
    {
/* 
   create the thread, add it to the Vector, start it, and wait 
   until its done playing to return
*/
Playback playback = new Playback();
playbacks.add(playback);
playback.start();
while(playback.isAlive()){;}//wait until the sound is done playing
    }
    
 
    /**
     * Calls <code>playAtRateInRange((float)rate, 0, (int)durInFrames-1, false)
     * </code>.  Checks the value of durInFrames to make sure that it is not 
     * larger than Integer.MAX_VALUE to guarrantee safe casting.  Also checks
     * the value of rate to make sure that it is not larger than Float.MAX_VALUE
     * before casting.
     * 
     * @param rate a double representing the change in sampleRate (==frameRate)
     *             for playing back this sound
     * @param durInFrames a double representing how much of this sound we want 
     *                    to play.
     * @see JavaSound#playAtRateInRange(float rate, int startFrame, 
     *                                  int endFrame, boolean isBlocking)
     * @throws JavaSoundException if there are problems playing the sound.
     */
    public void playAtRateDur(double rate, double durInFrames) 
throws JavaSoundException
    {
if(durInFrames > getLengthInFrames())
    {
printError("The given duration in frames, " + durInFrames + 
   " is out of the playable range.  Try something " +
   "between 1 and " + getLengthInFrames());
    }
if(rate > Float.MAX_VALUE)
    {
printError("The new sample rate, " + rate + "is out of the " +
   "playable range.  Try something between " +
   "0 and " + Float.MAX_VALUE);
    }
playAtRateInRange((float)rate, 0, (int)durInFrames-1, false);
    }
 
    /**
     * Calls <code>playAtRateInRange((float)rate, 0, (int)durInFrames-1, true)
     * </code>.  First, checks the value of durInFrames to make sure that it is 
     * not larger than Integer.MAX_VALUE to guarrantee safe casting.  
     * Simmilarly, checks the value of rate to make sure that it is not larger 
     * than FLoat.MAX_VALUE before casting.
     * 
     * @param rate a double representing the change in sampleRate (==frameRate)
     *             for playing back this sound
     * @param durInFrames a double representing how much of this sound we want 
     *                    to play 
     * @see JavaSound#playAtRateInRange(float range, int startFrame, 
     *                                  int endFrame, boolean isBlocking)
     * @throws JavaSoundException if there are problems playing the sound.
     */
    public void blockingPlayAtRateDur(double rate, double durInFrames)
throws JavaSoundException
    {
if(durInFrames > getLengthInFrames())
    {
printError("The given duration in frames, " + durInFrames + 
   " is out of the playable range.  Try something " +
   "between 1 and " + getLengthInFrames());
    }
if(rate > Float.MAX_VALUE)
    {
printError("The new sample rate, " + rate + "is out of the " +
   "playable range.  Try something between " +
   "0 and " + Float.MAX_VALUE);
    }
 
playAtRateInRange((float)rate, 0, (int)durInFrames-1, true);

    }
 
    /**
     * Calls <code>playAtRateInRange(rate, startFrame, endFrame, false)
     * </code>.
     * 
     * @param rate a float representing the change in sampleRate (==frameRate)
     *             for playing back this sound
     * @param startFrame an int representing the frame at which we want to begin
     *                   playing the sound
     * @param endFrame an int representing the frame at which want to stop
     *                 playing the sound
     * @see JavaSound#playAtRateInRange(float range, int startFrame, 
     *                                  int endFrame, boolean isBlocking)
     * @throws JavaSoundException if there are problems playing the sound.
     */
    public void playAtRateInRange(float rate, int startFrame, int endFrame)
throws JavaSoundException
    {
playAtRateInRange(rate, startFrame, endFrame, false);
    }
    
    /**
     * Calls <code>playAtRateInRange(rate, startFrame, endFrame, true)
     * </code>.
     * 
     * @param rate a float representing the change in sampleRate (==frameRate)
     *             for playing back this sound
     * @param startFrame an int representing the frame at which we want to begin
     *                   playing the sound
     * @param endFrame an int representing the frame at which want to stop
     *                 playing the sound
     * @see JavaSound#playAtRateInRange(float range, int startFrame, 
     *                                  int endFrame, boolean isBlocking)
     * @throws JavaSoundException if there are problems playing the sound.
     */
    public void blockingPlayAtRateInRange(float rate, int startFrame, 
  int endFrame)
throws JavaSoundException
    {
playAtRateInRange(rate, startFrame, endFrame, true);
    }
    
    /**
     * Plays the specified segment of this sound at the given sample rate.  
     * Then it saves the old fields (buffer and audioFileFormat) of this sound 
     * into temporary variables, and setting the fields of this sound to 
     * modified values.  Then it creates a Playback thread on this sound (with 
     * the modified values) and starts the thread.  The values for buffer and
     * audioFileFormat are restored to their original values before the method
     * returns. 
     *
     * @param rate The change in the sampleRate (==frameRate) for playing back
     *             this sound.  The old SampleRate is multiplied by this value.
     *             So, if rate = 2, the sound will play twice as fast (half
     *             the length), and if rate = .5, the sound will play half as 
     *             fast (twice the length).
     * @param startFrame The index of the frame where we want to begin play
     * @param endFrame The index of the frame where we want to end play
     * @param isBlocking If true, this method waits until the thread is done
     *                   playing the sound before returning.  If false, it
     *                   simply starts the thread and then returns.
     * @throws JavaSoundException if there are any problems playing the sound.
     */
    public void playAtRateInRange(float rate, int startFrame, int endFrame, 
  boolean isBlocking)
throws JavaSoundException
    {
 
//before we get started, lets try to check for some obvious errors.  
//maybe we can avoid some of those pesky array out of bounds exceptions.
if(endFrame >= getAudioFileFormat().getFrameLength())
    {
printError("You are trying to play to index: " + (endFrame+1) +
   ".  The sound only has " + 
   getAudioFileFormat().getFrameLength() +
   " samples total.");
    }
if(startFrame < 0)
    {
printError("You cannot start playing at index " + 
   (startFrame+1) + 
   ".  Choose 1 to start at the begining.");
    }
if(endFrame < startFrame)
    {
printError("You cannot start playing at index " + 
   (startFrame+1) + " and stop playing at index " + 
   (endFrame+1) + ".  The start index must be before" +
   "the stop index.");
    }


       /*
  we want to save the current buffer and audioFileFormat 
  so we can return to them when we're finished.
*/
byte[] oldBuffer = getBuffer();
AudioFileFormat oldAFF = getAudioFileFormat();

//just to make the code easier to read
int frameSize = getAudioFileFormat().getFormat().getFrameSize();
int durInFrames = (endFrame - startFrame) + 1;
if(DEBUG)
    System.out.println("\tnew durInFrames = " + durInFrames);

//we want to make a new buffer, only as long as we need
int newBufferSize = durInFrames * frameSize;
        
byte[] newBuffer = new byte[newBufferSize];
for(int i = 0; i <  newBufferSize; i++)
    {
newBuffer[i] = oldBuffer[(startFrame*frameSize) + i];
    }
 
//now we want to make a new audioFormat with the same information
//except a different rate
AudioFormat newAF = 
    new AudioFormat(oldAFF.getFormat().getEncoding(),
    oldAFF.getFormat().getSampleRate() * rate,
    oldAFF.getFormat().getSampleSizeInBits(),
    oldAFF.getFormat().getChannels(),
    oldAFF.getFormat().getFrameSize(),
    oldAFF.getFormat().getFrameRate() * rate,
    oldAFF.getFormat().isBigEndian());
 
//now put that new AudioFormat into a new AudioFileFormat with
//the changed duration in frames
AudioFileFormat newAFF = 
    new AudioFileFormat(oldAFF.getType(), newAF, durInFrames);

 
/*
  change the values in this Sound
*/
setBuffer(newBuffer);
setAudioFileFormat(newAFF);
if(DEBUG)
    {
System.out.println("playAtRateInRange(" + rate + ", " + 
   startFrame + ", " + endFrame + ", " +
   isBlocking + ")");
System.out.println("\t(length of sound = " + 
   getAudioFileFormat().getFrameLength() + ")");
    }

/*
  play the modified sound
*/
Playback playback = new Playback();
playbacks.add(playback);
playback.start();

if(isBlocking)
    while(playback.isAlive()){;}//wait until the thread exits
 
/*
  we need to wait until the thread is done with the values 
  before we change them back.  The playing flag is set to false 
  until the loop begins in which data is actually written out.
  see Playback#run()
*/
while(!playback.getPlaying()){;}

setBuffer(oldBuffer);//restore the buffer
setAudioFileFormat(oldAFF);//restore the file format
    }
    
    /**
     * Deletes the specified playback object from the Vector.  This should
     * only be called from within the run() method of an individual
     * playback thread.  
     *
     * @see Playback#run()
     */
    private void removePlayback(Playback playbackToRemove)
    {
if(playbacks.contains(playbackToRemove))
    {
playbacks.remove(playbackToRemove);
playbackToRemove = null;
    }
    }
 
    /**
     * The nested class <code>Playback</code> extends from <code>Thread</code>
     * and allows for playback of this sound.  The thread doesn't die until
     * the sound is finished playing, however it is not blocking either.  It
     * will simply play the sound in the "background."
     */
    public class Playback extends Thread
    {
SourceDataLine line;
boolean playing = false;
 
private void shutDown(String message, Exception e) 
{
    if (message != null)
{
    System.err.println(message);
    e.printStackTrace();
}
    playing = false;
}

/**
 * Stops this thread by breaking the while loop in the run method.  
 * Used, for example, by the "stop" button in the SoundView class.
 */
public void stopPlaying()
{
    playing = false;
}

public boolean getPlaying()
{
    return playing;
}
 
/**
 * Starts this thread.  Gets an AudioInputStream, and writes is out
 * to a SourceDataLine.  If a SoundView exists, upon creation of 
 * the SourceDataLine, the soundView is added as the LineListener.
 * When the thread finishes the run method, it removes itself from the 
 * list of threads currently playing this sound.
 * @throws JavaSoundException if there were problems playing the sound.
 */
public void run()
{
    
    //get something to play
    AudioInputStream audioInputStream = makeAIS();
    if(audioInputStream == null)
{
    shutDown("There is no input stream to play", null);
    return;
}
    
    //reset stream to the begining
    try
{
    audioInputStream.reset();
}
    catch(Exception e)
{
    shutDown("Problems resetting the stream\n", e);
    return;
}
    
    /*
      define the required attributes for the line
      make sure a compatible line is supported
    */
    DataLine.Info info = new DataLine.Info(SourceDataLine.class, 
   audioFileFormat.getFormat());
    if(!AudioSystem.isLineSupported(info))
{
    shutDown("Line matching " + info + "not supported.", null);
    return;
}
    
    //get and open the source data line for playback
    try
{
    line = (SourceDataLine) AudioSystem.getLine(info);
    if(soundView != null)
line.addLineListener(soundView);
    line.open(audioFileFormat.getFormat(), BUFFER_SIZE);
}
    catch(LineUnavailableException e)
{
    shutDown("Unable to open the line: ", e);
    return;
}
    
    //play back the captured data
    int frameSizeInBytes = audioFileFormat.getFormat().getFrameSize();
    int bufferLengthInBytes = line.getBufferSize();
    int bufferLengthInFrames = bufferLengthInBytes / frameSizeInBytes;
    byte[] data = new byte[bufferLengthInBytes];
    int numBytesRead = 0;
    
    //start the source data line and begin playing
    line.start();
    playing = true;
 
    /*
      the loop that actually writes the data out
    */
    while(playing)
{
    try
{
    if((numBytesRead = audioInputStream.read(data)) 
       == -1)
{
    break;//end of audioInputStream
}
    int numBytesRemaining = numBytesRead;
    while(numBytesRemaining > 0)
{
    numBytesRemaining -= 
line.write(data, 0, numBytesRemaining);
}//while
}//try
    catch(Exception e)
{
    shutDown("Error during playback: ", e);
    break;
}//catch
}//while
    
    /*
      we reached the end of the stream or an error occurred. 
      if we were playing, then let the data play out, else, skip to
      stopping and closing the line.
    */
    if(playing)
line.drain();
  
    line.stop();
    line.close();
    line = null;
    shutDown(null, null);
    if(DEBUG)
System.out.println("exiting run method");
    /*
      this thread is about to die.  remove itself from the collection
      of threads playing this sound
    */
    removePlayback(this);

}//run()

    }//end class Playback
    
  
    /**************************************************************************/
    /********************** ACESSING SOUND INFORMATION ************************/
    /**************************************************************************/
    
    /**
     * Returns an array containing all of the bytes in the specified frame.
     * 
     * @param frameNum the index of the frame to access
     * @return the array containing all of the bytes in frame 
     *         <code>frameNum</code>
     * @throws JavaSoundException if the frame number is invalid.
     */
    public byte[] getFrame(int frameNum) throws JavaSoundException
    {
if(frameNum >= getAudioFileFormat().getFrameLength())
    {
printError("That index "+ (frameNum+1) +", does not exist. "+ 
   "There are only "+ 
   getAudioFileFormat().getFrameLength() + 
   " frames in the entire sound");
    }

int frameSize = getAudioFileFormat().getFormat().getFrameSize();
byte[] theFrame = new byte[frameSize];
for (int i = 0; i < frameSize; i++)
    {
theFrame[i] = getBuffer()[frameNum*frameSize+i];
    }
return theFrame;
    }
 
   
    /**
     * Obtains the length of the audio data contained in the file, expressed
     * in sample frames. 
     * 
     * @return the number of sample frames of audio data in the file
     */
    public int getLengthInFrames()
    {
return getAudioFileFormat().getFrameLength();
    }
    
    /**
     * If this is a mono sound, obtains the single sample contained within this 
     * frame, else obtains the first (left) sample contained in the specified
     * frame.
     *
     * @param frameNum the index of the frame to access
     * @return an integer representation of the bytes contained within the 
     *         specified frame
     * @throws JavaSoundException if the frame number is invalid.
     */
    public int getSample(int frameNum) throws JavaSoundException
    {
//Before we get started, lets make sure that frame exists
if(frameNum >= getAudioFileFormat().getFrameLength())
    {
printError("You are trying to access the sample at index: " 
   + (frameNum+1) + ", but there are only " + 
   getAudioFileFormat().getFrameLength() +
   " samples in the file!");
    }
if(frameNum < 0)
    {
printError("You asked for the sample at index: " + (frameNum+1) +
   ".  This number is less than one.  Please try" +
   "again using an index in the range [1," + 
   getAudioFileFormat().getFrameLength()+"]");
    }
      

AudioFormat format = getAudioFileFormat().getFormat();
int sampleSizeInBits = format.getSampleSizeInBits();
boolean isBigEndian = format.isBigEndian();
 
byte[] theFrame = getFrame(frameNum);
 
if(format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED))
    {
//since we're always returning the left sample, 
//we don't care if we're mono or stereo, left is
//always first in the frame
if(sampleSizeInBits == 8)//8 bits == 1 byte
    return theFrame[0];
else if(sampleSizeInBits == 16)
    return bytesToInt16(theFrame, 0, isBigEndian);
else if(sampleSizeInBits == 24)
    return bytesToInt24(theFrame, 0, isBigEndian);
else if(sampleSizeInBits == 32)
    return bytesToInt32(theFrame, 0, isBigEndian);
else
    {
printError("Unsupported audio encoding.  The sample "+
   "size is not recognized as a standard "+ 
   "format.");
return -1;
    }
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED))
    {
if(sampleSizeInBits == 8)
    return unsignedByteToInt(theFrame[0])-
(int)Math.pow(2,7);
else if(sampleSizeInBits == 16)
    return unsignedByteToInt16(theFrame, 0, isBigEndian)-
(int)Math.pow(2, 15);
else if(sampleSizeInBits == 24)
    return unsignedByteToInt24(theFrame, 0, isBigEndian)-
(int)Math.pow(2, 23);
else if(sampleSizeInBits == 32)
    return unsignedByteToInt32(theFrame, 0, isBigEndian)-
(int)Math.pow(2, 31);
else
    {
printError("Unsupported audio encoding.  The sample "+
   "size is not recognized as a standard "+
   "format.");
return -1;
    }
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ALAW))
    {
return alaw2linear(buffer[0]);
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ULAW))
    {
return ulaw2linear(buffer[0]);
    }
else
    {
printError("unsupported audio encoding: " + 
   format.getEncoding() + ".  Currently only PCM, " +
   "ALAW and ULAW are supported.  Please try again" +
   "with a different file.");
return -1;
    }
    }//getSample(int)
 
    /**
     * Obtains the left sample of the audio data contained at the specified 
     * frame.
     * 
     * @param frameNum the index of the frame to access
     * @return an int representation of the bytes contained in the specified
     *         frame.
     * @throws JavaSoundException if the frameNumber is invalid
     */
    public int getLeftSample(int frameNum) throws JavaSoundException
    {
//default is to getLeftSample

return getSample(frameNum);

 
    }
    
    /**
     * Obtains the right sample of the audio data contained at the specified
     * frame.
     *
     * @param frameNum the index of the frame to access
     * @return an int representation of the bytes contained in the specified
     *         frame.
     * @throws JavaSoundException if the frameNumber is invalid, or 
     *                            the encoding isn't supported.
     */
    public int getRightSample(int frameNum) throws JavaSoundException
    {
//Before we get started, lets make sure that frame exists
if(frameNum >= getAudioFileFormat().getFrameLength())
    {
printError("You are trying to access the sample at index: " 
   + (frameNum+1) + ", but there are only " + 
   getAudioFileFormat().getFrameLength() +
   " samples in the file!");
    }
if(frameNum < 0)
    {
printError("You asked for the sample at index: "+(frameNum+1) +
   ".  This number is less than one.  Please try" +
   " again using an index in the range [1," + 
   getAudioFileFormat().getFrameLength()+"].");
    }
 
AudioFormat format = getAudioFileFormat().getFormat();
int channels;
if((channels = format.getChannels())==1)
    {
printError("Only stereo sounds have different right and left" +
   " samples.  You are using a mono sound, try " +
   "getSample("+(frameNum+1)+") instead");
return -1;
    }
int sampleSizeInBits = format.getSampleSizeInBits();
boolean isBigEndian = format.isBigEndian();
 
byte[] theFrame = getFrame(frameNum);
 
if(format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED))
    {
if(sampleSizeInBits == 8)//8 bits == 1 byte
    return theFrame[1];
else if(sampleSizeInBits == 16)
    return bytesToInt16(theFrame, 2, isBigEndian);
else if(sampleSizeInBits == 24)
    return bytesToInt24(theFrame, 3, isBigEndian);
else if(sampleSizeInBits == 32)
    return bytesToInt32(theFrame, 4, isBigEndian);
else
    {
printError("Unsupported audio encoding.  The sample"+
   " size is not recognized as a standard"+
   " format.");
return -1;
    }
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED))
    {
if(sampleSizeInBits == 8)
    return unsignedByteToInt(theFrame[1]);
else if(sampleSizeInBits == 16)
    return unsignedByteToInt16(theFrame, 2, isBigEndian);
else if(sampleSizeInBits == 24)
    return unsignedByteToInt24(theFrame, 3, isBigEndian);
else if(sampleSizeInBits == 32)
    return unsignedByteToInt32(theFrame, 4, isBigEndian);
else
    {
printError("Unsupported audio encoding.  The sample"+
   " size is not recognized as a standard" +
   " format.");
return -1;
    }  
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ALAW))
    {
return alaw2linear(buffer[1]);
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ULAW))
    {
return ulaw2linear(buffer[1]);
    }
else
    {
printError("unsupported audio encoding: " + 
   format.getEncoding() + ".  Currently only PCM, " +
   "ALAW and ULAW are supported.  Please try again" +
   "with a different file.");
return -1;
    }
    }

    
    
    /**
     * Obtains the length of this sound in bytes.  Note, that this number is not
     * neccessarily the same as the length of this sound's file in bytes.
     *
     * @return the sound length in bytes
     */
    public int getLength()
    {
return buffer.length;
    }
    
    /**
     * Obtains the number of channels of this sound.
     *
     * @return the number of channels (1 for mono, 2 for stereo), or 
     * <code>AudioSystem.NOT_SPECIFIED</code>
     * @see AudioSystem#NOT_SPECIFIED
     */
    public int getChannels()
    {
return getAudioFileFormat().getFormat().getChannels();
    }
    
 
    /**************************************************************************/
    /************************** CHANGING THE SOUND ****************************/
    /**************************************************************************/
    
    /**
     * Changes the value of each byte of the specified frame.
     * 
     * @param frameNum the index of the frame to change
     * @param theFrame the byte array that will be copied into this sound's
     *                 buffer in place of the specified frame.
     *@throws JavaSoundException if the frameNumber is invalid.
     */
    public void setFrame(int frameNum, byte[] theFrame) throws JavaSoundException
    {
if(frameNum > getAudioFileFormat().getFrameLength())
    {
printError("That frame, number "+frameNum+", does not exist. "+
   "There are only " + 
   getAudioFileFormat().getFrameLength()+
   " frames in the entire sound");
    }
int frameSize = getAudioFileFormat().getFormat().getFrameSize();
if(frameSize != theFrame.length)
    printError("Frame size doesn't match, line 383.  This should" +
       " never happen.  Please report the problem to a TA.");
for(int i = 0; i < frameSize; i++)
    {
buffer[frameNum*frameSize+i] = theFrame[i];
    }
    }
 
    /**
     * Changes the value of the sample found at the specified frame.  If this
     * sound has more than one channel, then this defaults to setting only the
     * first (left) sample.
     *
     * @param frameNum the index of the frame where the sample should be changed
     * @param sample an int representation of the new sample to put in this
     *               sound's buffer at the specified frame
     * @throws JavaSoundException if the frameNumber is invalid, or
     *                            another problem is encountered
     */
    public void setSample(int frameNum, int sample) throws JavaSoundException
    {
AudioFormat format = getAudioFileFormat().getFormat();
int sampleSizeInBits = format.getSampleSizeInBits();
boolean isBigEndian = format.isBigEndian();

byte[] theFrame = getFrame(frameNum);
 
if(format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED))
    {
if(sampleSizeInBits == 8)//8 bits = 1 byte = first cell in array
    {
theFrame[0] = (byte)sample;
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 16)//2 bytes, first 2 cells in array
    {
intToBytes16(sample, theFrame, 0, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 24)
    {
intToBytes24(sample, theFrame, 0, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 32)
    {
intToBytes32(sample, theFrame, 0, isBigEndian);
setFrame(frameNum, theFrame);
    }
else
    {
printError("Unsupported audio encoding.  The sample"+
   "size is not recognized as a standard format");
    }
    }//if format == PCM_SIGNED
else if(format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED))
    {
if(sampleSizeInBits == 8)
    {
theFrame[0] = intToUnsignedByte(sample);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 16)
    {
intToUnsignedBytes16(sample, theFrame, 0, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 24)
    {
intToUnsignedBytes24(sample, theFrame, 0, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 32)
    {
intToUnsignedBytes32(sample, theFrame, 0, isBigEndian);
setFrame(frameNum, theFrame);
    }
 
else
    {
printError("Unsupported audio encoding.  The sample"+
   " size is not recognized as a standard "+
   "format.");
    }
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ALAW))
    {
if((sample>Short.MAX_VALUE)||(sample<Short.MIN_VALUE))
    printError("You are trying to set the sample value to: "+
       sample + ", but the maximum value for a sample"+
       " in this format is: "+Short.MAX_VALUE+
       ", and the minimum value is: "+Short.MIN_VALUE+
       ".  Please choose a value in that range.");
theFrame[0] = linear2alaw((short)sample);
setFrame(frameNum, theFrame);
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ULAW))
    {

if((sample>Short.MAX_VALUE)||(sample<Short.MIN_VALUE))
    printError("You are trying to set the sample value to: "+
       sample + ", but the maximum value for a sample"+
       " in this format is: "+Short.MAX_VALUE+
       ", and the minimum value is: "+Short.MIN_VALUE+
       ".  Please choose a value in that range.");
theFrame[0] = linear2ulaw((short)sample);
setFrame(frameNum, theFrame);
    }
else
    {
printError("unsupported audio encoding: " + 
   format.getEncoding() + ".  Currently only PCM, " +
   "ALAW and ULAW are supported.  Please try again" +
   "with a different file.");
    }
    }//setSample(int, int)
    
    public void setLeftSample(int frameNum, int sample) throws JavaSoundException
    {
setSample(frameNum, sample);
    }
 
    public void setRightSample(int frameNum, int sample) 
throws JavaSoundException
    {
AudioFormat format = getAudioFileFormat().getFormat();
int sampleSizeInBits = format.getSampleSizeInBits();
boolean isBigEndian = format.isBigEndian();
 
if(format.getChannels() == 1)
    printError("this is a mono sound.  only stereo sounds have" +
       " different left and right samples.");
 
byte[] theFrame = getFrame(frameNum);

if(format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED))
    {
//right will always be the second in the frame
if(sampleSizeInBits == 8)
    {
theFrame[1] = (byte)sample;
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 16)
    {
intToBytes16(sample, theFrame, 2, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 24)
    {
intToBytes24(sample, theFrame, 3, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 32)
    {
intToBytes32(sample, theFrame, 4, isBigEndian);
setFrame(frameNum, theFrame);
    }
else
    {
printError("Unsupported audio encoding.  The sample"+
   "size is not recognized as a standard format");
    }
    }//if format == PCM_SIGNED
else if(format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED))
    {
if(sampleSizeInBits == 8)
    {
theFrame[1] = intToUnsignedByte(sample);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 16)
    {
intToUnsignedBytes16(sample, theFrame, 2, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 24)
    {
intToUnsignedBytes24(sample, theFrame, 3, isBigEndian);
setFrame(frameNum, theFrame);
    }
else if(sampleSizeInBits == 32)
    {
intToUnsignedBytes32(sample, theFrame, 4, isBigEndian);
setFrame(frameNum, theFrame);
    }
else
    {
printError("Unsupported audio encoding.  The sample"+
   " size is not recognized as a standard"+
   " format");
    }
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ALAW))
    {
if((sample>Short.MAX_VALUE)||(sample<Short.MIN_VALUE))
    printError("You are trying to set the sample value to: "+
       sample + ", but the maximum value for a sample"+
       " in this format is: "+Short.MAX_VALUE+
       ", and the minimum value is: "+Short.MIN_VALUE+
       ".  Please choose a value in that range.");
theFrame[1] = linear2alaw((short)sample);
setFrame(frameNum, theFrame);
    }
else if(format.getEncoding().equals(AudioFormat.Encoding.ULAW))
    {
if((sample>Short.MAX_VALUE)||(sample<Short.MIN_VALUE))
    printError("You are trying to set the sample value to: "+
       sample + ", but the maximum value for a sample"+
       " in this format is: "+Short.MAX_VALUE+
       ", and the minimum value is: "+Short.MIN_VALUE+
       ".  Please choose a value in that range.");
theFrame[1] = linear2ulaw((short)sample);
setFrame(frameNum, theFrame);
    }
else
    {
printError("unsupported audio encoding: " + 
   format.getEncoding() + ".  Currently only PCM, " +
   "ALAW and ULAW are supported.  Please try again" +
   "with a different file.");
    }
    }//setRightSample(int, int)
   
 
    /**************************************************************************/
    /****************************** MISC FUNCTIONS ****************************/
    /**************************************************************************/
    
    /*
     * conversion tools from tritonus (http://www.tritonus.org)
     */
    
    /*
     *      TConversionTool.java
     */ 
    
    /*
     *  Copyright (c) 1999,2000 by Florian Bomers <[e-mail]>
     *  Copyright (c) 2000 by Matthias Pfisterer <[e-mail]>
     *
     *
     *   This program is free software; you can redistribute it and/or modify
     *   it under the terms of the GNU Library General Public License as 
     *   published by the Free Software Foundation; either version 2 of the 
     *   License, or (at your option) any later version.
     *
     *   This program is distributed in the hope that it will be useful,
     *   but WITHOUT ANY WARRANTY; without even the implied warranty of
     *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     *   GNU Library General Public License for more details.
     *
     *   You should have received a copy of the GNU Library General Public
     *   License along with this program; if not, write to the Free Software
     *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
     *
     */
    
    /**
     * Converts 2 successive bytes starting at <code>byteOffset</code> in 
     * <code>buffer</code> to a signed integer sample with 16bit range.
     * <p>
     * For little endian, buffer[byteOffset] is interpreted as low byte,
     * whereas it is interpreted as high byte in big endian.
     * <p> This is a reference function.
     */ 
    private static int bytesToInt16( byte [] buffer, int byteOffset, 
    boolean bigEndian) 
    { 
return bigEndian?
    ((buffer[byteOffset]<<8) | (buffer[byteOffset+1] & 0xFF)):
     
    ((buffer[byteOffset+1]<<8) | (buffer[byteOffset] & 0xFF));
    } 
    
    /**
     * Converts 3 successive bytes starting at <code>byteOffset</code> in 
     * <code>buffer</code> to a signed integer sample with 24bit range.
     * <p>
     * For little endian, buffer[byteOffset] is interpreted as lowest byte,
     * whereas it is interpreted as highest byte in big endian.
     * <p> This is a reference function.
     */ 
    private static int bytesToInt24( byte [] buffer, int byteOffset, 
    boolean bigEndian) 
    { 
return bigEndian?
    ((buffer[byteOffset]<<16) // let Java handle sign-bit 
     | ((buffer[byteOffset+1] & 0xFF)<<8) // inhibit sign-bit handling 
     | ((buffer[byteOffset+2] & 0xFF))):
    
    ((buffer[byteOffset+2]<<16) // let Java handle sign-bit 
     | ((buffer[byteOffset+1] & 0xFF)<<8) // inhibit sign-bit handling 
     | (buffer[byteOffset] & 0xFF));
    } 
    
    /**
     * Converts a 4 successive bytes starting at <code>byteOffset</code> in 
     * <code>buffer</code> to a signed 32bit integer sample.
     * <p>
     * For little endian, buffer[byteOffset] is interpreted as lowest byte,
     * whereas it is interpreted as highest byte in big endian.
     * <p> This is a reference function.
     */ 
    private static int bytesToInt32( byte [] buffer, int byteOffset, 
    boolean bigEndian) 
    { 
return bigEndian?
    ((buffer[byteOffset]<<24) // let Java handle sign-bit 
     | ((buffer[byteOffset+1] & 0xFF)<<16) // inhibit sign-bit handling 
     | ((buffer[byteOffset+2] & 0xFF)<<8) // inhibit sign-bit handling 
     | (buffer[byteOffset+3] & 0xFF)):
    
    ((buffer[byteOffset+3]<<24) // let Java handle sign-bit 
     | ((buffer[byteOffset+2] & 0xFF)<<16) // inhibit sign-bit handling 
     | ((buffer[byteOffset+1] & 0xFF)<<8) // inhibit sign-bit handling 
     | (buffer[byteOffset] & 0xFF));
    } 
    
    /////////////////////// ULAW ///////////////////////////////////////////
 
    private static final boolean ZEROTRAP=true;
    private static final short BIAS=0x84;
    private static final int CLIP=32635;
    private static final int exp_lut1[] ={
0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,
4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
    };
    
 
    /* u-law to linear conversion table */ 
    private static short [] u2l = {
-32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
-23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
-15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
-11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
-876, -844, -812, -780, -748, -716, -684, -652,
-620, -588, -556, -524, -492, -460, -428, -396,
-372, -356, -340, -324, -308, -292, -276, -260,
-244, -228, -212, -196, -180, -164, -148, -132,
-120, -112, -104, -96, -88, -80, -72, -64,
-56, -48, -40, -32, -24, -16, -8, 0,
32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
876, 844, 812, 780, 748, 716, 684, 652,
620, 588, 556, 524, 492, 460, 428, 396,
372, 356, 340, 324, 308, 292, 276, 260,
244, 228, 212, 196, 180, 164, 148, 132,
120, 112, 104, 96, 88, 80, 72, 64,
56, 48, 40, 32, 24, 16, 8, 0
    }; 
    private static short ulaw2linear( byte ulawbyte) 
    { 
return u2l[ulawbyte & 0xFF];
    } 
 
    /**
     * Converts a linear signed 16bit sample to a uLaw byte.
     * Ported to Java by fb.
     * <BR>Originally by:<BR>
     * Craig Reese: IDA/Supercomputing Research Center <BR>
     * Joe Campbell: Department of Defense <BR>
     * 29 September 1989 <BR>
     */
    public static byte linear2ulaw(int sample) {
int sign, exponent, mantissa, ulawbyte;

if (sample>32767) sample=32767;
else if (sample<-32768) sample=-32768;
/* Get the sample into sign-magnitude. */
sign = (sample >> 8) & 0x80;    /* set aside the sign */
if (sign != 0) sample = -sample;    /* get magnitude */
if (sample > CLIP) sample = CLIP;    /* clip the magnitude */

/* Convert from 16 bit linear to ulaw. */
sample = sample + BIAS;
exponent = exp_lut1[(sample >> 7) & 0xFF];
mantissa = (sample >> (exponent + 3)) & 0x0F;
ulawbyte = ~(sign | (exponent << 4) | mantissa);
if (ZEROTRAP)
    if (ulawbyte == 0) ulawbyte = 0x02;  /* optional CCITT trap */
return((byte) ulawbyte);
    }
    
    
    /*
     * This source code is a product of Sun Microsystems, Inc. and is provided
     * for unrestricted use.  Users may copy or modify this source code without
     * charge.
     *
     * linear2alaw() - Convert a 16-bit linear PCM value to 8-bit A-law
     *
     * linear2alaw() accepts an 16-bit integer and encodes it as A-law data.
     *
     *              Linear Input Code       Compressed Code
     *      ------------------------        ---------------
     *      0000000wxyza                    000wxyz
     *      0000001wxyza                    001wxyz
     *      000001wxyzab                    010wxyz
     *      00001wxyzabc                    011wxyz
     *      0001wxyzabcd                    100wxyz
     *      001wxyzabcde                    101wxyz
     *      01wxyzabcdef                    110wxyz
     *      1wxyzabcdefg                    111wxyz
     *
     * For further information see John C. Bellamy's Digital Telephony, 1982,
     * John Wiley & Sons, pps 98-111 and 472-476.
     */ 
    private static final byte QUANT_MASK = 0xf;/* Quantization field mask. */
    private static final byte SEG_SHIFT = 4;  /* Left shift for segment number. */
    private static final short[] seg_end = {
0xFF, 0x1FF, 0x3FF, 0x7FF, 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF
    };
 
    
    /*
     * conversion table alaw to linear
     */
    private static short [] a2l = {
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
-22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
-30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
-11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
-15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
-344, -328, -376, -360, -280, -264, -312, -296,
-472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40,
-216, -200, -248, -232, -152, -136, -184, -168,
-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
-688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848,
5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424,
88, 72, 120, 104, 24, 8, 56, 40,
216, 200, 248, 232, 152, 136, 184, 168,
1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592,
944, 912, 1008, 976, 816, 784, 880, 848
    }; 
    
    private static short alaw2linear( byte ulawbyte) 
    { 
return a2l[ulawbyte & 0xFF];
    } 
    
    public static byte linear2alaw(short pcm_val)
    /* 2's complement (16-bit range) */
    {
bytemask;
byteseg=8;
byteaval;

if (pcm_val >= 0) {
    mask = (byte) 0xD5;/* sign (7th) bit = 1 */
} else {
    mask = 0x55;/* sign bit = 0 */
    pcm_val = (short) (-pcm_val - 8);
}

/* Convert the scaled magnitude to segment number. */
for (int i = 0; i < 8; i++) {
    if (pcm_val <= seg_end[i]) {
seg=(byte) i;
break;
    }
}

/* Combine the sign, segment, and quantization bits. */
if (seg >= 8)/* out of range, return maximum value. */
    return (byte) ((0x7F ^ mask) & 0xFF);
else {
    aval = (byte) (seg << SEG_SHIFT);
    if (seg < 2)
aval |= (pcm_val >> 4) & QUANT_MASK;
    else
aval |= (pcm_val >> (seg + 3)) & QUANT_MASK;
    return (byte) ((aval ^ mask) & 0xFF);
}
    }
    
   
 
    
    /**
     * Converts a 16 bit sample of type <code>int</code> to 2 bytes in an array.
     * <code>sample</code> is interpreted as signed (as Java does).
     * <p>
     * For little endian, buffer[byteOffset] is filled with low byte of sample, 
     * and buffer[byteOffset+1] is filled with high byte of sample + sign bit.
     * <p> For big endian, this is reversed.
     * <p> Before calling this function, it should be assured that 
     * <code>sample</code> is in the 16bit range - it will not be clipped.
     * <p> This is a reference function.
     */ 
    private static void intToBytes16( int sample, byte [] buffer, int byteOffset, 
     boolean bigEndian) 
    { 
if (bigEndian) 
    {
buffer[byteOffset++]=( byte ) (sample >> 8);
buffer[byteOffset]=( byte ) (sample & 0xFF);
    } 
else 
    {
buffer[byteOffset++]=( byte ) (sample & 0xFF);
buffer[byteOffset]=( byte ) (sample >> 8);
    }
    } 
    
    /**
     * Converts a 24 bit sample of type <code>int</code> to 3 bytes in an array.
     * <code>sample</code> is interpreted as signed (as Java does).
     * <p>
     * For little endian, buffer[byteOffset] is filled with low byte of sample, 
     * and buffer[byteOffset+2] is filled with the high byte of sample + 
     * sign bit.
     * <p> For big endian, this is reversed.
     * <p> Before calling this function, it should be assured that 
     * <code>sample</code> is in the 24bit range - it will not be clipped.
     * <p> This is a reference function.
     */ 
    private static void intToBytes24( int sample, byte [] buffer, 
      int byteOffset, boolean bigEndian) 
    { 
if (bigEndian) 
    {
buffer[byteOffset++]=( byte ) (sample >> 16);
buffer[byteOffset++]=( byte ) ((sample >>> 8) & 0xFF);
buffer[byteOffset]=( byte ) (sample & 0xFF);
    } 
else 
    {
buffer[byteOffset++]=( byte ) (sample & 0xFF);
buffer[byteOffset++]=( byte ) ((sample >>> 8) & 0xFF);
buffer[byteOffset]=( byte ) (sample >> 16);
    }
    } 
    
    /**
     * Converts a 32 bit sample of type <code>int</code> to 4 bytes in an array.
     * <code>sample</code> is interpreted as signed (as Java does).
     * <p>
     * For little endian, buffer[byteOffset] is filled with lowest byte of 
     * sample, and buffer[byteOffset+3] is filled with the high byte of 
     * sample + sign bit.
     * <p> For big endian, this is reversed.
     * <p> This is a reference function.
     */ 
    private static void intToBytes32( int sample, byte [] buffer, 
      int byteOffset, boolean bigEndian) 
    { 
if (bigEndian) 
    {
buffer[byteOffset++]=( byte ) (sample >> 24);
buffer[byteOffset++]=( byte ) ((sample >>> 16) & 0xFF);
buffer[byteOffset++]=( byte ) ((sample >>> 8) & 0xFF);
buffer[byteOffset]=( byte ) (sample & 0xFF);
    } 
else 
    {
buffer[byteOffset++]=( byte ) (sample & 0xFF);
buffer[byteOffset++]=( byte ) ((sample >>> 8) & 0xFF);
buffer[byteOffset++]=( byte ) ((sample >>> 16) & 0xFF);
buffer[byteOffset]=( byte ) (sample >> 24);
    }
    } 
    
    /*
     * Byte<->Int conversions for unsigned pcm data were written
     * by myself with help from Real's Java How-To:
     * <a href="http://www.rgagnon.com/javadetails/java-0026.html" target="_blank" rel="nofollow">http://www.rgagnon.com/javadetails/java-0026.html</a>
     */
    
    private static int unsignedByteToInt(byte b) 
    {
/* 
 * & 0xFF while seemingly doing nothing to the individual bits,
 * forces java to recognize the byte as unsigned.  so, we return to
 * the calling function a number between 0 and 256.
 */
return ((int) b & 0xFF);
    }
 
    private static int unsignedByteToInt16(byte[] buffer, int offset, 
  boolean isBigEndian)
    {
/*
 * here, we want to take the first byte and shift it left
 * 8 bits then concatenate on the 8 bits in the second byte.
 * now we have a 16 bit number that java will recognize as
 * unsigned, so we return a number in the range [0, 65536]
 */

if(isBigEndian)
    {
return ( (unsignedByteToInt(buffer[offset]) << 8) |
 unsignedByteToInt(buffer[offset+1]) );
    }
else
    {
return( (unsignedByteToInt(buffer[offset+1]) << 8) |
unsignedByteToInt(buffer[offset]));
    }

    }
 
    public static int unsignedByteToInt24(byte[] buffer, int offset,
  boolean isBigEndian)
    {
if(isBigEndian)
    {
return ( (unsignedByteToInt(buffer[offset]) << 16) |
 (unsignedByteToInt(buffer[offset+1]) << 8) |
 unsignedByteToInt(buffer[offset+2]));
    }
else
    {
return ( (unsignedByteToInt(buffer[offset+2]) << 16) |
 (unsignedByteToInt(buffer[offset+1]) << 8) |
 unsignedByteToInt(buffer[offset]));
    }
    }
 
    public static int unsignedByteToInt32(byte[] buffer, int offset,
  boolean isBigEndian)
    {
if(isBigEndian)
    {
return( (unsignedByteToInt(buffer[offset]) << 24) |
(unsignedByteToInt(buffer[offset+1]) << 16) |
(unsignedByteToInt(buffer[offset+2]) << 8) |
unsignedByteToInt(buffer[offset+3]) );
    }
else
    {
return((unsignedByteToInt(buffer[offset+3]) << 24) |
(unsignedByteToInt(buffer[offset+2]) << 16) |
(unsignedByteToInt(buffer[offset+1]) << 8) |
unsignedByteToInt(buffer[offset]) );
    }
    }

    public static byte intToUnsignedByte(int sample)
    {
/*
 * does the reverse of the function above
 * we have an integer that is signed, so we're in the range 
 * [-128, 127], we want to convert to an unsigned number in 
 * the range [0,256], then put that into an unsigned byte
 * all while java tries to treat everythign as signed.
 * 
 * so.... say we want to set the sample value to -128
 * in our unsigned byte, this translates to 0, so we want
 * java's representation of -128: 10000000 to instead be stored
 * as 0: 00000000 so, we simply xor with -128, flipping the sign bit
 *
 * another example we want to store the max value 127: 01111111
 * translating into the unsigned range, the max is 256: 11111111
 * again, you can see all we need to change is the sign bit.
 *
 * and lastly, for something in the middle:
 * say we want to store the value 0: 00000000
 * translating into the unsigned range, we have the middle
 * value 128: 10000000
 * again, we just want to flip the first bit
 *
 * something a little more tricky... say we want to store the value 32
 * now this translates to 32--128 = 160 in unsigned representation
 * so we start with 32 = 00100000 and we want to go to
 *                 160 = 10100000 
 *
 * see, we just flip the sign bit, its the same as adding 128 which
 * is how we translate between  [-128,127] and [0,256].
 */
return((byte)(sample ^ -128));
    }
 

 
    public static void intToUnsignedBytes16(int sample, byte [] buffer, 
      int byteOffset, boolean bigEndian) 
    {
 
/* 
 * for this comment only, treat ^ not as XOR as we use it in java
 * but as an exponent symbol like on a calculator, i thought 2^15 
 * would be clearer than 32768.
 * the theory here is very simmilar to the 8 bit conversion we
 * did above.  only now we have 16 bits we want to write into.
 * so, we're going from the range [-2^15, 2^15-1] into the range
 * [0, 2^16].  again, to translate, we just need to add 2^15 to
 * our number, so we get the first byte, by shifting right 8 bits, 
 * (note: >>> is unsigned shift), and then XOR with -128 to flip the
 * sign bit.  for the second byte, we just want the last 8 bits
 * of our integer, so we & with 0xff to tell java to treat this
 * as unsigned, and just copy over the bit values.
 */
if(bigEndian)
    {
buffer[byteOffset] = (byte)(sample >>> 8 ^ -128);
buffer[byteOffset+1] = (byte)(sample & 0xff);
    }
else
    {
buffer[byteOffset+1] = (byte)(sample >>> 8 ^ -128);
buffer[byteOffset] = (byte)(sample & 0xff);
    }
    }
 
    public static void intToUnsignedBytes24(int sample, byte [] buffer, 
      int byteOffset, boolean bigEndian)
    {
if(bigEndian)
    {
buffer[byteOffset] = (byte)(sample >>> 16 ^ -128);
buffer[byteOffset+1] = (byte)(sample >>> 8);
buffer[byteOffset +2] = (byte)(sample & 0xff);
    }
else
    {
buffer[byteOffset+2] = (byte)(sample >>> 16 ^ -128);
buffer[byteOffset+1] = (byte)(sample >>> 8);
buffer[byteOffset] = (byte)(sample & 0xff);
    }
    }
 
    public static void intToUnsignedBytes32(int sample, byte [] buffer, 
      int byteOffset, boolean bigEndian)
    {
if(bigEndian)
    {
buffer[byteOffset] = (byte)(sample >>> 24 ^ -128);
buffer[byteOffset+1] = (byte)(sample >>> 16);
buffer[byteOffset+2] = (byte)(sample >>> 8);
buffer[byteOffset+3] = (byte)(sample & 0xff);
    }
else
    {
buffer[byteOffset+3] = (byte)(sample >>> 24 ^ -128);
buffer[byteOffset+2] = (byte)(sample >>> 16);
buffer[byteOffset+1] = (byte)(sample >>> 8);
buffer[byteOffset] = (byte)(sample & 0xff);
    }
    }
    
    /**************************************************************************/
    /********************* SOME STRINGS ABOUT THE SOUND ***********************/
    /**************************************************************************/
    
    /**
     * Obtains a string representation of this JavaSound. 
     *
     * @return a String representation of this JavaSound.
     */
    public String toString()
    {
return getAudioFileFormat().getFormat().toString();
    }
    
    
    public String justATaste()
    {
return "Sorry, justATaste is not implemented at this time.";
    }
    
    public String justABufferTaste(byte[] b)
    {
return "Sorry, justABufferTaste is not implemented at this time.";
    }
    
    public static void main(String args[])
    {

try{
    
    /*
     * 16 bit, stereo, big endian (pretty short)
     *
     
     JavaSound mysound1 = 
     new JavaSound("/Users/ellie/mediacomp/ellie/JavaSoundDemo/audio/22-new.aif");
     System.out.println("new file format: " + mysound1);
     
    */
    
    /*
     * 16 bit, mono, little endian (also pretty short)
     *
     JavaSound mysound2 = 
     new JavaSound("/Users/ellie/mediacomp/ellie/JavaSoundDemo/audio/1-welcome.wav");
     System.out.println("new file format: " + mysound2);
    */
    
/*
 * writing to a file
 *
 
 mysound2.writeToFile("/Users/ellie/Desktop/mysound2.wav");
*/
    
/*
 * testing compatibility with old file, getFrame, getSample, etc.
 * now we're 0-indexed... media.py will be 1-indexed
 * WON'T COMPILE WITHOUT OldJavaSound.class and BackgroundCloser.class
 
 OldJavaSound oldSound = new OldJavaSound();
 oldSound.loadFromFile("/Users/ellie/Desktop/ellie/JavaSoundDemo/audio/1-welcome.wav");
 System.out.println("old file format: " + oldSound.audioFormat);
 
 System.out.println("\nnew file frame 0: " + mysound2.getFrame(0));
 System.out.println("\tnew file sample 0: " + mysound2.getSample(0));
 System.out.println("old file frame 1: " + oldSound.getFrame(1));
 System.out.println("\told file sample 1: " + oldSound.getSample(1));
 
 System.out.println("\new file frame 1: " + mysound2.getFrame(1));
 System.out.println("\tnew file sample 1: " + mysound2.getSample(1));
 System.out.println("old file frame 2: " + oldSound.getFrame(2));
 System.out.println("\told file sample 2: " + oldSound.getSample(2));
 
 System.out.println("\nnew file frame 2: " + mysound2.getFrame(2));
 System.out.println("\tnew file sample 2: "+mysound2.getSample(2));
 System.out.println("old file frame 3: " + oldSound.getFrame(3));
 System.out.println("\told file sample 3: "+oldSound.getSample(3));
 
*/
/*
  System.out.println("\nnew file set sample 2: 14");
  mysound2.setSample(2, 14);
  System.out.println("\tchecking value: " + mysound2.getSample(2));
*/
    
/*
 * general blocking play, stereo
 *
 System.out.println("\nblocking play:  stereo");
 mysound1.blockingPlay();
*/
    
/*
 * testing playAtRateDur
 *
 System.out.println("\nblocking - double the rate");
 mysound1.blockingPlayAtRateDur
 (2, mysound1.getAudioFileFormat().getFrameLength());
 
 System.out.println("\nblocking - back to the original sound");
 mysound1.blockingPlay();
 
 System.out.println("\nblocking - half the duration");
 mysound1.blockingPlayAtRateDur
 (1, mysound1.getAudioFileFormat().getFrameLength()/2);
 
 System.out.println("\nnon-blocking - back to original sound");
 mysound1.play();
 
 System.out.println("\nblocking - half the rate");
 mysound1.blockingPlayAtRateDur
 (.5, mysound1.getAudioFileFormat().getFrameLength());
 
 System.out.println("\nblocking - only the middle ");
 mysound1.blockingPlayAtRateInRange(1, 35811, 71623);
*/
    
/*
 * test for a really long sound ~2.5 minutes
 *
 System.out.println("\ncreating a new sound:  big yellow taxi");
 JavaSound longSound = 
 new JavaSound("/Users/ellie/Desktop/ellie/Big Yellow Taxi.wav");
 
 System.out.println("\n blocking - long wav");
 longSound.blockingPlay();
*/
    
    /*
      testing those unsigned byte conversions
    */
 
    JavaSound windowsSound = 
new JavaSound("/Users/ellie/Desktop/sound2.wav");
 
    System.out.println("getSample(28567): " + 
       windowsSound.getSample(28567));
 
    windowsSound.setSample(28567, -32);
 
    System.out.println("is it the same?" + 
       windowsSound.getSample(28567));

 
    // cannot do ws1, ws2, they are in "Microsoft ADPCM" format
    // Java cannot create an audioInputStream from the file
    //JavaSound ws1 =
    //new JavaSound("/Users/ellie/Desktop/audio/wmpaud7.wav");
    //System.out.println(ws1.getAudioFileFormat().getFormat());
 
    //JavaSound ws2 =
    //new JavaSound("/Users/ellie/Desktop/audio/wmpaud6.wav");
    //System.out.println(ws2.getAudioFileFormat().getFormat());
 
    //ws3,4,7,8 are all little-endian, and signed
    JavaSound ws3 =
new JavaSound("/Users/ellie/Desktop/audio/startup.wav");
    System.out.println(ws3.getAudioFileFormat().getFormat());
 
    JavaSound ws4 =
new JavaSound("/Users/ellie/Desktop/audio/ETUDE_16.WAV");
    System.out.println(ws4.getAudioFileFormat().getFormat());
 
    
    JavaSound ws7 =
new JavaSound("/Users/ellie/Desktop/audio2/pcm_11.025_16_mono.wav");
    System.out.println(ws7.getAudioFileFormat().getFormat());
 
    JavaSound ws8 =
new JavaSound("/Users/ellie/Desktop/audio2/pcm_11.025_16_stereo.wav");
    System.out.println(ws8.getAudioFileFormat().getFormat());
 
    
    //5 and 6 are the only two windows saved in unsigned format:
    JavaSound ws5 =
new JavaSound("/Users/ellie/Desktop/audio2/pcm_11.025_8_mono.wav");
    System.out.println(ws5.getAudioFileFormat().getFormat());
 
    //6 is really 8kHz contrary to the filename i typed incorrectly
    JavaSound ws6 =
new JavaSound("/Users/ellie/Desktop/audio2/pcm_11.025_8_stereo.wav");
    System.out.println(ws6.getAudioFileFormat().getFormat());
 
   
 
    System.out.println("");
    System.out.println(ws5.getSample(0));
    ws5.setSample(0,ws5.getSample(0));
    System.out.println(ws5.getSample(0));
    
    System.out.println("");
    System.out.println(ws5.getSample(1));
    ws5.setSample(1,ws5.getSample(1));
    System.out.println(ws5.getSample(1));
    
    System.out.println("");
    System.out.println(ws6.getSample(0));
    ws6.setSample(0, ws6.getSample(0));
    System.out.println(ws6.getSample(0));
 
    /*
      and now for other bit sizes and endiannesses
    
 
    JavaSound big8 = new JavaSound(8, true);
    JavaSound big16 = new JavaSound(16, true);
    JavaSound big24 = new JavaSound(24, true);
    JavaSound big32 = new JavaSound(32, true);
 
    JavaSound little8 = new JavaSound(8, false);
    JavaSound little16 = new JavaSound(16, false);
    JavaSound little24 = new JavaSound(24, false);
    JavaSound little32 = new JavaSound(32, false);
 
    System.out.println("LEFT\n\tbig8(0): " + big8.getLeftSample(0) +
       "\n\tbig16(0): " + big16.getLeftSample(0) +
       "\n\tbig24(0): " + big24.getLeftSample(0) +
       "\n\tbig32(0): " + big32.getLeftSample(0) +
       "\n\tlittle8(0): " + little8.getLeftSample(0) +
       "\n\tlittle16(0): " + little16.getLeftSample(0) +
       "\n\tlittle24(0): " + little24.getLeftSample(0) +
       "\n\tlittle32(0): " + little32.getLeftSample(0));
    
     System.out.println("RIGHT\n\tbig8(0): " + big8.getRightSample(0) +
       "\n\tbig16(0): " + big16.getRightSample(0) +
       "\n\tbig24(0): " + big24.getRightSample(0) +
       "\n\tbig32(0): " + big32.getRightSample(0) +
       "\n\tlittle8(0): " + little8.getRightSample(0) +
       "\n\tlittle16(0): " + little16.getRightSample(0) +
       "\n\tlittle24(0): " + little24.getRightSample(0) +
       "\n\tlittle32(0): " + little32.getRightSample(0));
 
     big8.setLeftSample(0,0);
     big16.setLeftSample(0,0);
     big24.setLeftSample(0,0);
     big32.setLeftSample(0,0);
 
     little8.setLeftSample(0,0);
     little16.setLeftSample(0,0);
     little24.setLeftSample(0,0);
     little32.setLeftSample(0,0);
 
     big8.setRightSample(0,0);
     big16.setRightSample(0,0);
     big24.setRightSample(0,0);
     big32.setRightSample(0,0);
 
     little8.setRightSample(0,0);
     little16.setRightSample(0,0);
     little24.setRightSample(0,0);
     little32.setRightSample(0,0);
 
     System.out.println("LEFT\n\tbig8(0): " + big8.getLeftSample(0) +
       "\n\tbig16(0): " + big16.getLeftSample(0) +
       "\n\tbig24(0): " + big24.getLeftSample(0) +
       "\n\tbig32(0): " + big32.getLeftSample(0) +
       "\n\tlittle8(0): " + little8.getLeftSample(0) +
       "\n\tlittle16(0): " + little16.getLeftSample(0) +
       "\n\tlittle24(0): " + little24.getLeftSample(0) +
       "\n\tlittle32(0): " + little32.getLeftSample(0));
    
     System.out.println("RIGHT\n\tbig8(0): " + big8.getRightSample(0) +
       "\n\tbig16(0): " + big16.getRightSample(0) +
       "\n\tbig24(0): " + big24.getRightSample(0) +
       "\n\tbig32(0): " + big32.getRightSample(0) +
       "\n\tlittle8(0): " + little8.getRightSample(0) +
       "\n\tlittle16(0): " + little16.getRightSample(0) +
       "\n\tlittle24(0): " + little24.getRightSample(0) +
       "\n\tlittle32(0): " + little32.getRightSample(0));
 
     //setting bounds
     big8.setLeftSample(0,0-(int)Math.pow(2,7));
     big16.setLeftSample(0,0-(int)Math.pow(2,15));
     big24.setLeftSample(0,0-(int)Math.pow(2,23));
     big32.setLeftSample(0, 0-(int)Math.pow(2,31));
 
     little8.setLeftSample(0,0-(int)Math.pow(2,7));
     little16.setLeftSample(0,0-(int)Math.pow(2,15));
     little24.setLeftSample(0,0-(int)Math.pow(2, 23));
     little32.setLeftSample(0,0-(int)Math.pow(2, 31));
 
     big8.setRightSample(0,(int)Math.pow(2,7)-1);
     big16.setRightSample(0,(int)Math.pow(2,15)-1);
     big24.setRightSample(0,(int)Math.pow(2,23)-1);
     big32.setRightSample(0,(int)Math.pow(2,31)-1);
 
     little8.setRightSample(0,(int)Math.pow(2,7)-1);
     little16.setRightSample(0,(int)Math.pow(2,15)-1);
     little24.setRightSample(0,(int)Math.pow(2,23)-1);
     little32.setRightSample(0,(int)Math.pow(2,31)-1);
 
     System.out.println("Set left to -2^x, right to 2^x-1");
 
     System.out.println("LEFT\n\tbig8(0): " + big8.getLeftSample(0) +
       "\n\tbig16(0): " + big16.getLeftSample(0) +
       "\n\tbig24(0): " + big24.getLeftSample(0) +
       "\n\tbig32(0): " + big32.getLeftSample(0) +
       "\n\tlittle8(0): " + little8.getLeftSample(0) +
       "\n\tlittle16(0): " + little16.getLeftSample(0) +
       "\n\tlittle24(0): " + little24.getLeftSample(0) +
       "\n\tlittle32(0): " + little32.getLeftSample(0));
    
     System.out.println("RIGHT\n\tbig8(0): " + big8.getRightSample(0) +
       "\n\tbig16(0): " + big16.getRightSample(0) +
       "\n\tbig24(0): " + big24.getRightSample(0) +
       "\n\tbig32(0): " + big32.getRightSample(0) +
       "\n\tlittle8(0): " + little8.getRightSample(0) +
       "\n\tlittle16(0): " + little16.getRightSample(0) +
       "\n\tlittle24(0): " + little24.getRightSample(0) +
       "\n\tlittle32(0): " + little32.getRightSample(0));
    */
 
    System.out.println("\nexiting main");
}
catch(Exception e)
    {
System.out.println(e.getMessage());
    }
System.exit(0);

    }//main
    
}//end class JavaSound 
 

  
 
 public class JavaSoundException extends Exception
    {
public JavaSoundException(String message)
{
    super(message);
}
    } 
 

   
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Vector;
import javax.sound.sampled.*;
import java.lang.Math;
import java.awt.geom.*;
 
public class SoundView implements MouseMotionListener, ActionListener, 
  MouseListener, LineListener
{
    private boolean DEBUG = false;
 
    //main parts of the gui
    private JFrame soundFrame;
    private JPanel playPanel;
    private JScrollPane scrollSound;
    private JPanel soundPanel;
    
    //general information
    /**
     * The JavaSound this displays.
     */
    private JavaSound sound;
    
    /**
     * Whether to display the sound in stereo - NOT neccessarily
     * whether or not the sound is in stereo
     */
    private boolean inStereo;
    
    //parts of the play panel
    private JLabel startIndex;
    private JLabel stopIndex;
    private JPanel buttonPanel;
    private JButton playEntire;
    private JButton playSelection;
    private JButton playBefore;
    private JButton playAfter;
    private JButton stop;
    
    //info related to the play panel
    private boolean selectionPrevState;
    
 
    //parts of the sound panel
    private JPanel leftSoundPanel;
    private JPanel rightSoundPanel;
    private JPanel leftSampleWrapper;
    private JPanel rightSampleWrapper;
    private SamplingPanel leftSamplePanel;
    private SamplingPanel rightSamplePanel;
  
    //parts of the information panel
    private JPanel infoPanel;
    private JLabel indexLabel;
    private JPanel sampleLabelPanel;
    private JLabel leftSampleLabel;
    private JLabel rightSampleLabel;
    private JPanel zoomButtonPanel;
    private JButton zoomButton;
    
    //info related to the sound panel
    private int zoomOutWidth;
    private int zoomInWidth;
    private int sampleWidth;
    private int sampleHeight;
    private int labelHeight;
    private int soundPanelHeight;
    private float framesPerPixel;
    private int cushion;
    private int currentPosition;  
    
    
    //info related to event handling
    private int mousePressed;
    private int mouseReleased;
    private int mousePressedX;
    private int mouseReleasedX;
    private boolean mouseDragged;
    private int startFrame;
    private int stopFrame;
    private int selectionStart;
    private int selectionStop;
    
 
    ///CONSTANTS///
    private static final String currentIndexText = "Current Index: ";
    private static final String startIndexText = "Start At Index: ";
    private static final String stopIndexText = "Stop At Index: ";
    private static final Color selectionColor = Color.gray;
    private static final Color backgroundColor = Color.black;
    private static final Color waveColor = Color.white;
    private static final Color barColor = Color.cyan;
 
    //SEMI-CONSTANTS
    private String leftSampleText = "Sample Value: ";
    private String rightSampleText = "Right (Bottom) Sample Value: ";
 
    //set up variables
    public SoundView(JavaSound sound, boolean inStereo)
    {
this.sound = sound;
this.inStereo = inStereo;

if(inStereo)
    leftSampleText = "Left (Top) Sample Value: ";
 
//this causes the JavaSound class to add this SoundView 
//as the line listener for any SourceDataLines created so
//we can monitor starting and stopping to enable/disable
//play and stop buttons
sound.setSoundView(this);

//used for determining difference between a mouse release
//after a click and a mouse release after a drag.  upon dragging,
//we want to select a region, upon clicking, only move the
//vertical bar
mouseDragged = false;
selectionStart = -1;
selectionStop = -1;

//size of the sampling panel
zoomOutWidth = 640;
zoomInWidth = sound.getLengthInFrames();
sampleWidth = zoomOutWidth;
sampleHeight = 201; 
labelHeight = 50;

//cushion so that the sampling panel isn't flush against the 
//left side - we want a small border so it looks neater
cushion = 10;

//the current x-coordinate of the vertical bar
currentPosition = 0;
 

 
//display everything
createWindow();
    }
 
    private void catchException(Exception ex)
    {
System.err.println(ex.getMessage());
    }
    
    public void setTitle(String s)
    {
soundFrame.setTitle(s);
    }
 
    private void createWindow()
    {
String fileName = sound.getFileName();
if(fileName==null)
    fileName = "no file name";
 
soundFrame = new JFrame(fileName);
 
if(inStereo)
    {
soundFrame.
    setSize(new Dimension
    (zoomOutWidth+cushion, 
     2*(sampleHeight+cushion)+labelHeight+100));
    }
else
    {
soundFrame.
    setSize(new Dimension
    (zoomOutWidth+cushion, 
     sampleHeight+cushion+labelHeight+100));
    }

soundFrame.getContentPane().setLayout(new BorderLayout());
soundFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
//also on close we need to remove the soundView listener?
 
//creates the play panel
createPlayPanel();
soundFrame.getContentPane().add(playPanel, BorderLayout.NORTH);

//creates the sound panel
createSoundPanel();

//creates the scrollpane for the sound
scrollSound = new JScrollPane();
scrollSound.setViewportView(soundPanel);
soundFrame.getContentPane().add(scrollSound, BorderLayout.CENTER);
scrollSound.setVerticalScrollBarPolicy
    (JScrollPane.VERTICAL_SCROLLBAR_NEVER);
 
//creates the info panel - this displays the current index
//and sample values
createInfoPanel();
 
soundFrame.getContentPane().add(infoPanel, BorderLayout.SOUTH);
 
soundFrame.setResizable(false);

soundFrame.setVisible(true);
 

    }//createWindow()
    
    private JButton makeButton(String name, boolean enabled, JPanel panel)
    {
JButton j = new JButton(name);
j.addActionListener(this);
j.setEnabled(enabled);
panel.add(j);
return j;
    }
   
    private void createPlayPanel()
    {
playPanel = new JPanel();

playPanel.setPreferredSize(new Dimension(zoomOutWidth, 60));

playPanel.setLayout(new BorderLayout());

startIndex = new JLabel(startIndexText + "N/A");
stopIndex = new JLabel(stopIndexText + "N/A");

buttonPanel = new JPanel();

playEntire = makeButton("Play Entire Sound", true, buttonPanel);
playSelection = makeButton("Play Selection", false, buttonPanel);
selectionPrevState = false;
playBefore = makeButton("Play Before", false, buttonPanel);
playAfter = makeButton("Play After", true, buttonPanel);
stop = makeButton("Stop", false, buttonPanel);
 
playPanel.add(buttonPanel, BorderLayout.NORTH);
playPanel.add(startIndex, BorderLayout.WEST);
playPanel.add(stopIndex, BorderLayout.EAST);
 
    }//createPlayPanel()
    
    private void createSoundPanel()
    {
//the main panel, we'll add everything to this at the end
soundPanel = new JPanel();
if(inStereo)
    soundPanel.setLayout(new GridLayout(2,1));
else
    soundPanel.setLayout(new GridLayout(1,1));
 
/*
  do all the stuff to display the left channel.  we'll only
  make the stuff to display the right channel if neccessary.
  everything will go into the leftSoundPanel, which is then
  added to the main soundPanel
*/
leftSoundPanel = new JPanel();
leftSoundPanel.setLayout(new BorderLayout());
leftSoundPanel.setPreferredSize
    (new Dimension(sampleWidth, sampleHeight+cushion));

/*
  the sampling panel - this is where the wave form displays.
  we put it in a wrapper so that it looks centered within the
  main soundPanel
*/
leftSampleWrapper = new JPanel();//so its centered
leftSamplePanel = new SamplingPanel(true);
leftSamplePanel.addMouseMotionListener(this);
leftSamplePanel.addMouseListener(this);
leftSampleWrapper.add(leftSamplePanel);
leftSampleWrapper.
    setPreferredSize(new Dimension(sampleWidth, sampleHeight+cushion));

/*
  put all the pieces into the left sound panel:
  the sample at the top, below it we want the 
  current index on the left
  zoom button in the middle (unless its stereo - then the zoom button
                             goes in the right sound panel)
  and current sample value on the right
*/
leftSoundPanel.add(leftSampleWrapper, BorderLayout.NORTH);
 
soundPanel.add(leftSoundPanel);
 
soundPanelHeight = sampleHeight+cushion;

if(inStereo)
    {
rightSoundPanel = new JPanel();
rightSoundPanel.setLayout(new BorderLayout());
rightSoundPanel.setPreferredSize
    (new Dimension(sampleWidth, sampleHeight+cushion));

rightSampleWrapper = new JPanel();
rightSamplePanel = new SamplingPanel(false);
rightSamplePanel.addMouseMotionListener(this);
rightSamplePanel.addMouseListener(this);
rightSampleWrapper.add(rightSamplePanel);
rightSampleWrapper.setPreferredSize
    (new Dimension(sampleWidth, sampleHeight+cushion));
 

rightSoundPanel.add(rightSampleWrapper, BorderLayout.NORTH);

soundPanel.add(rightSoundPanel);

soundPanelHeight = 2*(sampleHeight+cushion);
    }

soundPanel.setPreferredSize(new Dimension(zoomOutWidth,soundPanelHeight));
soundPanel.setSize(soundPanel.getPreferredSize());
    }
    
    public void createInfoPanel()
    {
infoPanel = new JPanel();
sampleLabelPanel = new JPanel();

indexLabel = new JLabel(currentIndexText + "1");

try
    {
leftSampleLabel = 
    new JLabel(leftSampleText + sound.getLeftSample(0));
if(inStereo)
    rightSampleLabel = 
new JLabel(rightSampleText + sound.getRightSample(0));
    }
catch(Exception ex)
    {
catchException(ex);
    }

zoomButtonPanel = new JPanel();
zoomButton = makeButton("Zoom In", true, zoomButtonPanel);
 

if(inStereo)
    {
sampleLabelPanel = new JPanel();
sampleLabelPanel.setLayout(new GridLayout(2,1));
sampleLabelPanel.add(leftSampleLabel);
sampleLabelPanel.add(rightSampleLabel);

infoPanel.setLayout(new GridLayout(1,4));
infoPanel.add(indexLabel);
infoPanel.add(zoomButtonPanel);
infoPanel.add(sampleLabelPanel);
    }
else
    {
infoPanel.setLayout(new GridLayout(1,3));
infoPanel.add(indexLabel);
infoPanel.add(zoomButtonPanel);
infoPanel.add(leftSampleLabel);
    }
    }
    
    public void mouseClicked(MouseEvent e)
    {
currentPosition = e.getX();
 
if(currentPosition==0)
    {
playBefore.setEnabled(false);
playAfter.setEnabled(true);
    }
else if(currentPosition < sampleWidth)
    {
playBefore.setEnabled(true);
playAfter.setEnabled(true);
    }
else if(currentPosition == sampleWidth)
    {
playBefore.setEnabled(true);
playAfter.setEnabled(false);
    }
 
int curFrame = (int)(currentPosition * framesPerPixel);
 
if(DEBUG)
    System.out.println("mouse click:  " + currentPosition);
 
indexLabel.setText(currentIndexText + curFrame);
try
    {
leftSampleLabel.setText(leftSampleText + 
sound.getLeftSample(curFrame));
    }
catch(Exception ex)
    {
catchException(ex);
    }

if(inStereo)
    {
indexLabel.setText(currentIndexText + curFrame);
try
    {
rightSampleLabel.setText(rightSampleText + 
    sound.getRightSample(curFrame));
    }
catch(Exception ex)
    {
catchException(ex);
    }
    }
soundPanel.repaint();
    }
 
    public void mousePressed(MouseEvent e)
    {
mousePressedX = e.getX();
    }
 
    public void mouseReleased(MouseEvent e)
    {
mouseReleasedX = e.getX();
 
if(mouseDragged)
    {
 
mousePressed = mousePressedX;
mouseReleased = mouseReleasedX;

if (mousePressed > mouseReleased)//selected right to left
    {
int temp = mousePressed;
mousePressed = mouseReleased;
mouseReleased = temp;
    }
 
startFrame = (int)(mousePressed * framesPerPixel);
stopFrame = (int)(mouseReleased * framesPerPixel);

//stopped dragging outside the window.
if(stopFrame >= sound.getLengthInFrames()) 
    stopFrame = sound.getLengthInFrames()-1;

//stopped dragging outside the window
if(startFrame < 0)
    startFrame = 0;
 
//new values for the labels
startIndex.setText(startIndexText + startFrame);
stopIndex.setText(stopIndexText + stopFrame);

//for highlighting the selection
selectionStart = mousePressed;
selectionStop = mouseReleased;
 
soundPanel.repaint();
playSelection.setEnabled(true);
mouseDragged = false;
    }
    
    }
 
    public void mouseEntered(MouseEvent e)
    {}
    
    public void mouseExited(MouseEvent e)
    {}
 
    public void mouseDragged(MouseEvent e)
    {
mouseDragged = true;
 
//highlight the selection as we drag by pretending
//that we're releasing the mouse at each point
mouseReleased(e);
    }
    
    public void mouseMoved(MouseEvent e)
    {}
        
    public void update(LineEvent e)
    {
if(e.getType().equals(LineEvent.Type.OPEN))
    {
playEntire.setEnabled(false);
playBefore.setEnabled(false);
playAfter.setEnabled(false);
selectionPrevState = playSelection.isEnabled();
playSelection.setEnabled(false);
stop.setEnabled(true);
    }
if(e.getType().equals(LineEvent.Type.CLOSE))
    {
playEntire.setEnabled(true);
playSelection.setEnabled(selectionPrevState);
stop.setEnabled(false);
if(currentPosition==0)
    {
playBefore.setEnabled(false);
playAfter.setEnabled(true);
    }
else if(currentPosition < sampleWidth)
    {
playBefore.setEnabled(true);
playAfter.setEnabled(true);
    }
else if(currentPosition == sampleWidth)
    {
playBefore.setEnabled(true);
playAfter.setEnabled(false);
    }
    }

    }
    
 
    public void actionPerformed(ActionEvent e)
    {
if(e.getActionCommand() == "Play Entire Sound")
    {
try
    {
sound.play();
    }
catch(Exception ex)
    {
catchException(ex);
    }
    }
else if(e.getActionCommand() == "Play Selection")
    {
try
    {
sound.playAtRateInRange(1, startFrame, stopFrame);
    }
catch(Exception ex)
    {
catchException(ex);
    }
    }
else if(e.getActionCommand().equals("Stop"))
    {
//stop all playback threads related to this sound
for(int i = 0; i < sound.getPlaybacks().size(); i++)
    {
((JavaSound.Playback)sound.getPlaybacks().elementAt(i))
    .stopPlaying();
    }
    }
else if(e.getActionCommand().equals("Zoom In"))
    {
zoomButton.setText("Zoom Out");

currentPosition = (int)(currentPosition*framesPerPixel);
selectionStart = (int)(selectionStart*framesPerPixel);
selectionStop = (int)(selectionStop*framesPerPixel);
 
if(DEBUG)
    System.out.println("Zoom In:  currentPosition = " +
       currentPosition);

 
sampleWidth = zoomInWidth;
 
soundPanel.setPreferredSize(new Dimension(zoomInWidth,
      soundPanel.getHeight()));
soundPanel.setSize(soundPanel.getPreferredSize());
 
leftSoundPanel.setPreferredSize(new Dimension(zoomInWidth, 
leftSoundPanel.getHeight()));
leftSoundPanel.setSize(leftSoundPanel.getPreferredSize());

leftSampleWrapper.setPreferredSize(new Dimension(zoomInWidth,
leftSampleWrapper.getHeight()));
leftSampleWrapper.setSize(leftSampleWrapper.getPreferredSize());
leftSamplePanel.setPreferredSize(new Dimension(sampleWidth,
       sampleHeight));
leftSamplePanel.setSize(leftSamplePanel.getPreferredSize());

leftSamplePanel.createWaveForm(true);

if(inStereo)
    {
rightSoundPanel.setPreferredSize
    (new Dimension(zoomInWidth, 
   rightSoundPanel.getHeight()));
rightSoundPanel.setSize
    (rightSoundPanel.getPreferredSize());
 
rightSampleWrapper.setPreferredSize
    (new Dimension(zoomInWidth,
   rightSampleWrapper.getHeight()));
rightSampleWrapper.setSize
    (rightSampleWrapper.getPreferredSize());
 
rightSamplePanel.setPreferredSize
    (new Dimension(zoomInWidth,
   rightSamplePanel.getHeight()));
rightSamplePanel.setSize
    (rightSamplePanel.getPreferredSize());
 
rightSamplePanel.createWaveForm(false);
    }
if(DEBUG)
{
    System.out.println("ZOOM IN SIZES:");
    System.out.println("\tleftSamplePanel: " + 
       leftSamplePanel.getSize());
    System.out.println("\t\tpreferred: " + 
       leftSamplePanel.getPreferredSize());
    
    System.out.println("\tleftSampleWrapper: " + 
       leftSampleWrapper.getSize());
    System.out.println("\t\tpreferred: " + 
       leftSampleWrapper.getPreferredSize());
    
    System.out.println("\tleftSoundPanel: " +
       leftSoundPanel.getSize());
    System.out.println("\t\tpreferred: " + 
       leftSoundPanel.getPreferredSize());
    
    System.out.println("\tsoundPanel: " + 
       soundPanel.getSize());
    System.out.println("\t\tpreferred: " + 
       soundPanel.getPreferredSize());
}
    }
else if (e.getActionCommand().equals("Zoom Out"))
    {
zoomButton.setText("Zoom In");
 
sampleWidth = zoomOutWidth;
 
int divisor = (sound.getLengthInFrames()/sampleWidth);
currentPosition = (int)(currentPosition/divisor);
selectionStart = (int)(selectionStart/divisor);
selectionStop = (int)(selectionStop/divisor);
 
if(DEBUG)
    System.out.println("Zoom Out:  currentPosition = " +
       currentPosition);
 
soundPanel.setPreferredSize
    (new Dimension(zoomOutWidth, 
   soundPanel.getHeight()));
soundPanel.setSize(soundPanel.getPreferredSize());

leftSoundPanel.setPreferredSize
    (new Dimension(zoomOutWidth, 
   leftSoundPanel.getHeight()));
leftSoundPanel.setSize(leftSoundPanel.getPreferredSize());

leftSampleWrapper.setPreferredSize
    (new Dimension(zoomOutWidth, 
   leftSampleWrapper.getHeight()));
leftSampleWrapper.setSize
    (leftSampleWrapper.getPreferredSize());

leftSamplePanel.setPreferredSize
    (new Dimension(sampleWidth, sampleHeight));
leftSamplePanel.setSize(leftSamplePanel.getPreferredSize());

leftSamplePanel.createWaveForm(true);

if(inStereo)
    {
rightSoundPanel.
    setPreferredSize
    (new Dimension(zoomOutWidth, 
   rightSoundPanel.getHeight()));
rightSoundPanel.setSize
    (rightSoundPanel.getPreferredSize());
 
rightSampleWrapper.setPreferredSize
    (new Dimension(zoomOutWidth,
   rightSampleWrapper.getHeight()));
rightSampleWrapper.setSize
    (rightSampleWrapper.getPreferredSize());

rightSamplePanel.setPreferredSize
    (new Dimension(sampleWidth, sampleHeight));
rightSamplePanel.setSize
    (rightSamplePanel.getPreferredSize());
 
rightSamplePanel.createWaveForm(false);
    }

soundPanel.repaint();
    }
else if(e.getActionCommand().equals("Play Before"))
    {
try
    {
sound.playAtRateInRange
    (1, 0, (int)(currentPosition * framesPerPixel));
    }
catch(Exception ex)
    {
catchException(ex);
    }
    }
else if(e.getActionCommand().equals("Play After"))
    {
try
    {
sound.playAtRateInRange
    (1, (int)(currentPosition*framesPerPixel), 
     sound.getLengthInFrames()-1);
    }
catch(Exception ex)
    {
catchException(ex);
    }
    }
else
    {
System.err.println("command not defined: " + 
   e.getActionCommand());
    }

    }
    
    public class SamplingPanel extends JPanel
    {

private boolean forLeftSample;
private Vector points;

public SamplingPanel(boolean inputForLeftSample)
{
    forLeftSample = inputForLeftSample;
       
    if(DEBUG)
    System.out.println("creating new sampling panel: " + 
    "\n\tfor left sample: "+forLeftSample +
    "\n\tsampleWidth: " + sampleWidth +
    "\n\tsampleHeight: " + sampleHeight);
    
    setBackground(backgroundColor);
    setPreferredSize(new Dimension(sampleWidth, sampleHeight));
    setSize(getPreferredSize());
    if(DEBUG)
    System.out.println("\tSample panel preferred size: " + 
    getPreferredSize() + "\n\tSample panel size: " + getSize());
    
    points = new Vector();
    createWaveForm(forLeftSample);
}//constructor(forLeftSample)

public void createWaveForm(boolean forLeftSample)
{
 
    //get the max y value for a sound of this sample size
    AudioFormat format = sound.getAudioFileFormat().getFormat();
    float maxValue;
  
    if(format.getSampleSizeInBits() == 8)
{
    maxValue = (float)Math.pow(2,7);
}
    else if(format.getSampleSizeInBits() == 16)
{
    maxValue = (float)Math.pow(2, 15);
}
    else if(format.getSampleSizeInBits() == 24)
{
    maxValue = (float)Math.pow(2, 23);
}
    else if(format.getSampleSizeInBits() == 32)
{
    maxValue = (float)Math.pow(2, 31);
}
    else
{
    try
{
    sound.printError("InvalidSampleSize");
}
    catch(Exception ex)
{
    catchException(ex);
}
    return;
}
  
    points.clear();
    framesPerPixel = sound.getLengthInFrames() / sampleWidth;
    for(int pixel = 0; pixel<sampleWidth; pixel++)
{
    float y;
    float sampleValue;
   
    
    if(forLeftSample)
{
    try
{
    sampleValue = sound.
getLeftSample((int)(pixel*framesPerPixel));
}
    catch(Exception ex)
{
    catchException(ex);
    return;
}
}
    else
{
    try
{
    sampleValue = sound.
getRightSample((int)(pixel*framesPerPixel));
}
    catch(Exception ex)
{
    catchException(ex);
    return;
}
}
    
    y = ((float)Math.floor(sampleHeight/2) - 
 (sampleValue  * ((float)Math.floor(sampleHeight/2) / 
  maxValue)));
    
    points.add(new Point2D.Float(pixel, y));
}//for - collecting points
    
     if(DEBUG)
System.out.println("number of points: " + points.size());
repaint();
        
}//createWaveForm()

public void paint(Graphics g)
{
    Rectangle rectToPaint = g.getClipBounds();
    
    if(DEBUG)
{
System.out.println("Repainting: " + rectToPaint);
System.out.println("\tSampleWidth: " + sampleWidth);
System.out.println("\tframesPerPixel: " + framesPerPixel);
System.out.println("\tSample panel size: " + getSize());
System.out.println("\tSamplePanel Width: " + getWidth());
System.out.println("\tSamplePanel Height: " + getHeight());
}
 
    //clear out the image
    Graphics2D g2 = (Graphics2D)g;
    g2.setBackground(backgroundColor);
    g2.clearRect((int)rectToPaint.getX(), (int)rectToPaint.getY(), 
 (int)rectToPaint.getWidth(), (int)rectToPaint.getHeight());
   
    //draw the selection if it exists
    if(selectionStart!=-1 && selectionStop!=-1)
{
    g2.setBackground(selectionColor);
    g2.clearRect(selectionStart, 0, 
 selectionStop-selectionStart+1, sampleHeight);
}
 
    //draw the lines
    g2.setColor(waveColor);
    for(int i = (int)rectToPaint.getX(); 
i < (rectToPaint.getX() + rectToPaint.getWidth() -1); i++)
{
    g2.draw(new 
    Line2D.Float((Point2D.Float)points.elementAt(i),
 (Point2D.Float)points.elementAt(i+1)));
}
 
    //draw the center line
    g2.setColor(barColor);
    g2.setStroke(new BasicStroke(1));
    g2.draw(new Line2D.Double(rectToPaint.getX(), 
      Math.floor(sampleHeight/2), 
      rectToPaint.getX()+rectToPaint.getWidth()-1,
      Math.floor(sampleHeight/2)));
    
    //draw the current position
    if (rectToPaint.getX()<currentPosition && 
currentPosition<(rectToPaint.getX()+rectToPaint.getWidth()-1))
{
    g2.setColor(barColor);
    g2.setStroke(new BasicStroke(1));
    g2.draw(new Line2D.Double(currentPosition, 0, 
      currentPosition, sampleHeight));  
}
}//paint(g)
 
    }//public class SamplingPanel
    
    public static void main(String args[])
    {
try{
 
    
    JavaSound shaggz2 =  new JavaSound("C:\\sound.wav");
    for(int i = 0; i < shaggz2.getLengthInFrames(); i++)
{
    shaggz2.setSample(i, shaggz2.getSample(i));
}
    SoundView shaggzView2 = new SoundView(shaggz2, false);
 
   
}
catch(Exception ex)
    {
System.out.println(ex.getMessage());
    }

    }
}//end class SoundView
 

 
 

[Yahya Elyasse]

Andrei
i would appreciate if you can paste the code of the 3 java sound examples in the forum (or my private MB) : that would be nice from your part.

thanks again

othman

[Yahya Elyasse]

thanks seems very interesting piece of code will definitely give it a try.

ps : it's weired why i can't get the link working

[Yahya Elyasse]

sorry for bothering you again.it seems the JavaSoundException.java file is missing.without it i can't compile the example.and the link above is strangely not working for me !
thanks.

[Ulf Dittmer]

it seems the JavaSoundException.java file is missing.

It's right there in the post, before the SoundView class.

[Yahya Elyasse]

Hi ,
i run the example and it's a very good java sound example.
however the view is not what i'm after .i only want to implement some sort of graphics visualization so that when some sound is active in my application;then this animation (typically vertical bars) is played.

i think it has to do with java 2d. is there any example for this in the resource link above.(when i try to access link an error : proxy error)

thanks