com.groovemanager.sampled.waveform
Class DynamicPeakWaveForm

java.lang.Object
  com.groovemanager.sampled.waveform.AbstractWaveForm
      com.groovemanager.sampled.waveform.PeakWaveForm
          com.groovemanager.sampled.waveform.DynamicPeakWaveForm

All Implemented Interfaces:

WaveForm

public class DynamicPeakWaveForm

extends PeakWaveForm

This class extends PeakWaveForm for being able to handle dynamically growing audio files especially for recording situations. This class is used by DynamicAudioFileWaveForm.

Author:

Manu Robledo

Field Summary

private static int	ARRAY_SIZE size of one pool element
private boolean	bigEndian endianess of the audio format
private byte[]	dataBuffer Temporary buffer
private int	dataPos Current write position for peak data to append
private byte[][]	datas peak data pool
private java.io.File	f The file into which the peak data should be written
private int	frameSize Frame size of the audio format in bytes
private int	index Current index inside the pool
private int[]	positions peak data pool positions
private java.io.RandomAccessFile	raFile RandomAccessFile wor reading and writing the peak data
private int	sampleSize Frame size of the audio format in bytes
private int	tempCount Temporary counter

Fields inherited from class com.groovemanager.sampled.waveform.PeakWaveForm

data, DEFAULT_PEAKFILE_EXTENSION, source

Fields inherited from class com.groovemanager.sampled.waveform.AbstractWaveForm

channels, displayWidth, intervallSize, nullWave, position, realLength

Constructor Summary

DynamicPeakWaveForm(javax.sound.sampled.AudioFormat format, int iSize)
Construct a new DynamicPeakWaveForm

Method Summary

void	append(byte[] data, int offset, int length) Dynamically append audio data to this WaveForm
void	close(long lastModified) Close this WaveForm indicating that no more data will be appended.
private byte[]	getCurrentData() Get the peak data for the current position.
private int	getCurrentIndex() Get the index of the peak data at the current position
byte	getMax(int channel) Get the maximum value at the current read position in the given channel
byte	getMin(int channel) Get the minimum value at the current read position in the given channel
private void	readDataAt(int index, byte[] b) Read peak data from the peak file at the given index

Methods inherited from class com.groovemanager.sampled.waveform.PeakWaveForm

checkPeakFile, createPeakWaveForm, getAdditionalToString, getData, getHeader, getPeak, readFromFile, subWaveForm, writeToStream

Methods inherited from class com.groovemanager.sampled.waveform.AbstractWaveForm

canProvide, getChannels, getDisplayableLength, getIntervallSize, getPosition, getRealLength, getRealPosition, getZoomFactor, next, rewind, setPosition, setRealPosition, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ARRAY_SIZE

private static final int ARRAY_SIZE

size of one pool element

See Also:

Constant Field Values

bigEndian

private boolean bigEndian

endianess of the audio format

dataBuffer

private byte[] dataBuffer

Temporary buffer

dataPos

private int dataPos

Current write position for peak data to append

datas

private byte[][] datas

peak data pool

f

private java.io.File f

The file into which the peak data should be written

frameSize

private int frameSize

Frame size of the audio format in bytes

index

private int index

Current index inside the pool

positions

private int[] positions

peak data pool positions

raFile

private java.io.RandomAccessFile raFile

RandomAccessFile wor reading and writing the peak data

sampleSize

private int sampleSize

Frame size of the audio format in bytes

tempCount

private int tempCount

Temporary counter

Constructor Detail

DynamicPeakWaveForm

public DynamicPeakWaveForm(javax.sound.sampled.AudioFormat format,
                           int iSize)

Construct a new DynamicPeakWaveForm

Parameters:

format - The format of the source audio format

iSize - The interval size to be used

Method Detail

append

public void append(byte[] data,
                   int offset,
                   int length)

Dynamically append audio data to this WaveForm

Parameters:

data - The audio data to append

offset - Start position inside the data Array

length - The length of data to append

close

public void close(long lastModified)

Close this WaveForm indicating that no more data will be appended. The header will be written into the file with the given audio file modification date

Parameters:

lastModified - The modification date of the audio file this WaveForm belongs to id it is known, otherwise -1

getCurrentData

private byte[] getCurrentData()

Get the peak data for the current position. This data will either be read from the peak file or from the pool of peak data

Returns:

The peak data that contains the peak values for the current position

getCurrentIndex

private int getCurrentIndex()

Get the index of the peak data at the current position

Returns:

The index of the peak data for the current position

getMax

public byte getMax(int channel)

Description copied from interface: WaveForm

Get the maximum value at the current read position in the given channel

Specified by:

getMax in interface WaveForm

Overrides:

getMax in class PeakWaveForm

Parameters:

channel - the zero-based index of the channel

Returns:

the maximum value at this position as byte

getMin

public byte getMin(int channel)

Description copied from interface: WaveForm

Get the minimum value at the current read position in the given channel

Specified by:

getMin in interface WaveForm

Overrides:

getMin in class PeakWaveForm

Parameters:

channel - the zero-based index of the channel

Returns:

the minimum value at this position as byte

readDataAt

private void readDataAt(int index,
                        byte[] b)

Read peak data from the peak file at the given index

Parameters:

index - The index to read

b - The byte Array to read the data into