com.frinika.sequencer.model.audio
Class BufferedRandomAccessFile

java.lang.Object
  com.frinika.sequencer.model.audio.BufferedRandomAccessFile

All Implemented Interfaces:

RandomAccessFileIF

public class BufferedRandomAccessFile
extends java.lang.Object
implements RandomAccessFileIF

Provides an implementation of RandomAccessFileIF that uses a cyclic cache. Collaborates with a BufferedRandomAccessFileManager File relative pointers ptr1 -> (ptr2-1) files sample in buffer endPtr end of file samples (+1) ptr being read from the cache.

Author:

pjl

Constructor Summary

BufferedRandomAccessFile(java.io.RandomAccessFile in, int buffSize, BufferedRandomAccessFileManager manager)

Method Summary

int	availableInCache()
void	close()
long	getFilePointer()
java.io.RandomAccessFile	getRandomAccesFile()
java.io.RandomAccessFile	getRandomAccessFile()
boolean	isFull()
long	length()
int	read(byte[] byteBuffer, int offSet, int n, boolean realTime) read the next n bytes
void	seek(long l, boolean realTime) if (!realTime) may block.

Methods inherited from class java.lang.Object

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

Constructor Detail

BufferedRandomAccessFile

public BufferedRandomAccessFile(java.io.RandomAccessFile in,
                                int buffSize,
                                BufferedRandomAccessFileManager manager)

Method Detail

isFull

public final boolean isFull()

getRandomAccesFile

public java.io.RandomAccessFile getRandomAccesFile()

availableInCache

public final int availableInCache()

read

public int read(byte[] byteBuffer,
                int offSet,
                int n,
                boolean realTime)
         throws java.io.IOException

read the next n bytes

Specified by:

read in interface RandomAccessFileIF

Parameters:

byteBuffer -

offSet -

n -

Returns:

Throws:

java.io.IOException

getFilePointer

public long getFilePointer()

length

public long length()
            throws java.io.IOException

Specified by:

length in interface RandomAccessFileIF

Throws:

java.io.IOException

seek

public void seek(long l,
                 boolean realTime)
          throws java.io.IOException

if (!realTime) may block. the buffer is filled else seek for processAudio thread. only sets the pointer (avoid synchronisation issues)

Specified by:

seek in interface RandomAccessFileIF

Parameters:

l - new file position

Throws:

java.io.IOException

close

public void close()

getRandomAccessFile

public java.io.RandomAccessFile getRandomAccessFile()

Specified by:

getRandomAccessFile in interface RandomAccessFileIF