Package com.sedmelluq.discord.lavaplayer.container.matroska.format

Class MatroskaFileReader

java.lang.Object

com.sedmelluq.discord.lavaplayer.container.matroska.format.MatroskaFileReader

public class MatroskaFileReader
extends java.lang.Object

Handles reading of elements and their content from an MKV file.

Constructor Summary

Constructors

Constructor	Description
MatroskaFileReader(SeekableInputStream inputStream)

Method Summary

Modifier and Type	Method	Description
byte[]	asBytes(MatroskaElement element)
double	asDouble(MatroskaElement element)
float	asFloat(MatroskaElement element)
int	asInteger(MatroskaElement element)
long	asLong(MatroskaElement element)
java.lang.String	asString(MatroskaElement element)
java.lang.String	asString(MatroskaElement element, java.nio.charset.Charset forceCharset)
java.io.DataInput	getDataInput()
long	getPosition()
MatroskaBlock	readBlockHeader(MatroskaElement parent, int trackFilter)	Reads one Matroska block header.
MatroskaElement	readNextElement(MatroskaElement parent)
void	seek(long position)	Seeks to the specified position.
void	skip(MatroskaElement element)

Methods inherited from class java.lang.Object

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

Constructor Detail

MatroskaFileReader

public MatroskaFileReader(SeekableInputStream inputStream)

Parameters:

inputStream - Input stream to read from.

Method Detail

readNextElement

public MatroskaElement readNextElement(MatroskaElement parent)
                                throws java.io.IOException

Parameters:

parent - The parent element to use for bounds checking, null is valid.

Returns:

The element whose header was read. Null if the parent/file has ended. The contents of this element are only valid until the next element at the same level is read, use MatroskaElement.frozen() to get a permanent instance.

Throws:

java.io.IOException - On read error

readBlockHeader

public MatroskaBlock readBlockHeader(MatroskaElement parent,
                                     int trackFilter)
                              throws java.io.IOException

Reads one Matroska block header. The data is of the block is not read, but can be read frame by frame using MatroskaBlock.getNextFrameBuffer(MatroskaFileReader, int).

Parameters:

parent - The block parent element.

trackFilter - The ID of the track to read data for from the block.

Returns:

An instance of a block if it contains data for the requested track, null otherwise.

Throws:

java.io.IOException - On read error.

asInteger

public int asInteger(MatroskaElement element)
              throws java.io.IOException

Parameters:

element - Element to read from

Returns:

The contents of the element as an integer

Throws:

java.io.IOException - On read error

asLong

public long asLong(MatroskaElement element)
            throws java.io.IOException

Parameters:

element - Element to read from

Returns:

The contents of the element as a long

Throws:

java.io.IOException - On read error

asFloat

public float asFloat(MatroskaElement element)
              throws java.io.IOException

Parameters:

element - Element to read from

Returns:

The contents of the element as a float

Throws:

java.io.IOException - On read error

asDouble

public double asDouble(MatroskaElement element)
                throws java.io.IOException

Parameters:

element - Element to read from

Returns:

The contents of the element as a double

Throws:

java.io.IOException - On read error

asString

public java.lang.String asString(MatroskaElement element)
                          throws java.io.IOException

Throws:

java.io.IOException

asString

public java.lang.String asString(MatroskaElement element,
                                 java.nio.charset.Charset forceCharset)
                          throws java.io.IOException

Parameters:

element - Element to read from

forceCharset - The charset to use, or null for default.

Returns:

The contents of the element as a string

Throws:

java.io.IOException - On read error

asBytes

public byte[] asBytes(MatroskaElement element)
               throws java.io.IOException

Parameters:

element - Element to read from

Returns:

The contents of the element as a byte array

Throws:

java.io.IOException - On read error

skip

public void skip(MatroskaElement element)
          throws java.io.IOException

Parameters:

element - Element to skip over

Throws:

java.io.IOException - On read error

getPosition

public long getPosition()

Returns:

Returns the current absolute position of the file.

seek

public void seek(long position)
          throws java.io.IOException

Seeks to the specified position.

Parameters:

position - The position in bytes.

Throws:

java.io.IOException - On read error

getDataInput

public java.io.DataInput getDataInput()