net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.video4linux2
Class Video4Linux2Stream

java.lang.Object
  net.java.sip.communicator.impl.neomedia.control.AbstractControls
      net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.AbstractBufferStream
          net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.AbstractPullBufferStream
              net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.AbstractVideoPullBufferStream
                  net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.video4linux2.Video4Linux2Stream

All Implemented Interfaces:

javax.media.Controls, javax.media.protocol.PullBufferStream, javax.media.protocol.SourceStream

public class Video4Linux2Stream
extends AbstractVideoPullBufferStream

Implements a PullBufferStream using the Video for Linux Two API Specification.

Author:

Lyubomir Marinov

Field Summary

Fields inherited from class net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.AbstractBufferStream

dataSource, formatControl

Fields inherited from interface javax.media.protocol.SourceStream

LENGTH_UNKNOWN

Constructor Summary

Video4Linux2Stream(DataSource dataSource, javax.media.control.FormatControl formatControl)
Initializes a new Video4Linux2Stream instance which is to have its Format-related information abstracted by a specific FormatControl.

Method Summary

void	close() Releases the resources used by this instance throughout its existence and makes it available for garbage collection.
protected javax.media.Format	doGetFormat() Gets the Format of this PullBufferStream as directly known by it.
protected void	doRead(javax.media.Buffer buffer) Reads media data from this PullBufferStream into a specific Buffer with blocking.
(package private) void	setFd(int fd) Sets the file descriptor of the Video for Linux Two API Specification device which is to be read through this PullBufferStream.
void	start() Starts the transfer of media data from this PullBufferStream.
void	stop() Stops the transfer of media data from this PullBufferStream.

Methods inherited from class net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.AbstractVideoPullBufferStream

read

Methods inherited from class net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.AbstractPullBufferStream

willReadBlock

Methods inherited from class net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.AbstractBufferStream

doSetFormat, endOfStream, getContentDescriptor, getContentLength, getControls, getFormat

Methods inherited from class net.java.sip.communicator.impl.neomedia.control.AbstractControls

getControl, getControl

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.media.protocol.PullBufferStream

getFormat

Methods inherited from interface javax.media.protocol.SourceStream

endOfStream, getContentDescriptor, getContentLength

Methods inherited from interface javax.media.Controls

getControl, getControls

Constructor Detail

Video4Linux2Stream

public Video4Linux2Stream(DataSource dataSource,
                          javax.media.control.FormatControl formatControl)

Initializes a new Video4Linux2Stream instance which is to have its Format-related information abstracted by a specific FormatControl.

Parameters:

dataSource - the DataSource which is creating the new instance so that it becomes one of its streams

formatControl - the FormatControl which is to abstract the Format-related information of the new instance

Method Detail

close

public void close()

Releases the resources used by this instance throughout its existence and makes it available for garbage collection. This instance is considered unusable after closing.

Overrides:

close in class AbstractBufferStream

See Also:

AbstractBufferStream.close()

doGetFormat

protected javax.media.Format doGetFormat()

Gets the Format of this PullBufferStream as directly known by it.

Overrides:

doGetFormat in class AbstractBufferStream

Returns:

the Format of this PullBufferStream as directly known by it or null if this PullBufferStream does not directly know its Format and it relies on the PullBufferDataSource which created it to report its Format

See Also:

AbstractBufferStream.doGetFormat()

doRead

protected void doRead(javax.media.Buffer buffer)
               throws IOException

Reads media data from this PullBufferStream into a specific Buffer with blocking.

Specified by:

doRead in class AbstractVideoPullBufferStream

Parameters:

buffer - the Buffer in which media data is to be read from this PullBufferStream

Throws:

IOException - if anything goes wrong while reading media data from this PullBufferStream into the specified buffer

See Also:

AbstractVideoPullBufferStream.doRead(Buffer)

setFd

void setFd(int fd)
     throws IOException

Sets the file descriptor of the Video for Linux Two API Specification device which is to be read through this PullBufferStream.

Parameters:

fd - the file descriptor of the Video for Linux Two API Specification device which is to be read through this PullBufferStream

Throws:

IOException - if anything goes wrong while setting the file descriptor of the Video for Linux Two API Specification device which is to be read through this PullBufferStream

start

public void start()
           throws IOException

Starts the transfer of media data from this PullBufferStream.

Overrides:

start in class AbstractVideoPullBufferStream

Throws:

IOException - if anything goes wrong while starting the transfer of media data from this PullBufferStream

See Also:

AbstractBufferStream.start()

stop

public void stop()
          throws IOException

Stops the transfer of media data from this PullBufferStream.

Overrides:

stop in class AbstractVideoPullBufferStream

Throws:

IOException - if anything goes wrong while stopping the transfer of media data from this PullBufferStream

See Also:

AbstractBufferStream.stop()