Package com.sedmelluq.discord.lavaplayer.container.mp3

Class Mp3FrameReader

java.lang.Object

com.sedmelluq.discord.lavaplayer.container.mp3.Mp3FrameReader

public class Mp3FrameReader
extends java.lang.Object

Handles reading MP3 frames from a stream.

Constructor Summary

Constructors

Constructor	Description
Mp3FrameReader(SeekableInputStream inputStream, byte[] frameBuffer)

Method Summary

Modifier and Type	Method	Description
void	appendToScanBuffer(byte[] data, int offset, int length)	Append some bytes to the frame sync scan buffer.
boolean	fillFrameBuffer()	Fills the buffer for the current frame.
int	getFrameSize()
long	getFrameStartPosition()
void	nextFrame()	Forget the current frame and make next calls look for the next frame.
boolean	scanForFrame(int bytesToCheck, boolean throwOnLimit)

Methods inherited from class java.lang.Object

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

Constructor Detail

Mp3FrameReader

public Mp3FrameReader(SeekableInputStream inputStream,
                      byte[] frameBuffer)

Parameters:

inputStream - Input buffer to read from

frameBuffer - Array to store the frame data in

Method Detail

scanForFrame

public boolean scanForFrame(int bytesToCheck,
                            boolean throwOnLimit)
                     throws java.io.IOException

Parameters:

bytesToCheck - The maximum number of bytes to check before throwing an IllegalStateException

throwOnLimit - Whether to throw an exception when maximum number of bytes is reached, but no frame has been found and EOF has not been reached.

Returns:

True if a frame was found, false if EOF was encountered.

Throws:

java.io.IOException - On IO error

java.lang.IllegalStateException - If the maximum number of bytes to check was reached before a frame was found

fillFrameBuffer

public boolean fillFrameBuffer()
                        throws java.io.IOException

Fills the buffer for the current frame. If no frame header has been read previously, it will first scan for the sync bytes of the next frame in the stream.

Returns:

False if EOF was encountered while looking for the next frame, true otherwise

Throws:

java.io.IOException - On IO error

nextFrame

public void nextFrame()

Forget the current frame and make next calls look for the next frame.

getFrameStartPosition

public long getFrameStartPosition()

Returns:

The start position of the current frame in the stream.

getFrameSize

public int getFrameSize()

Returns:

Size of the current frame in bytes.

appendToScanBuffer

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

Append some bytes to the frame sync scan buffer. This must be called when some bytes have been read externally that may actually be part of the next frame header.

Parameters:

data - The buffer to copy from

offset - The offset in the buffer

length - The length of the region to copy