org.jitsi.impl.neomedia.jmfext.media.protocol.video4linux2

Class DataSource

java.lang.Object

javax.media.protocol.DataSource

javax.media.protocol.PullBufferDataSource

org.jitsi.impl.neomedia.jmfext.media.protocol.AbstractPullBufferCaptureDevice

org.jitsi.impl.neomedia.jmfext.media.protocol.AbstractVideoPullBufferCaptureDevice

org.jitsi.impl.neomedia.jmfext.media.protocol.video4linux2.DataSource

All Implemented Interfaces:

javax.media.Controls, javax.media.Duration, javax.media.protocol.CaptureDevice

public class DataSource
extends AbstractVideoPullBufferCaptureDevice

Implements a PullBufferDataSource and CaptureDevice using the Video for Linux Two API Specification.

Author:

Lyubomir Marinov

Field Summary

Fields inherited from interface javax.media.Duration

DURATION_UNBOUNDED, DURATION_UNKNOWN

Constructor Summary

Constructors

Constructor and Description
DataSource() Initializes a new DataSource instance.
DataSource(javax.media.MediaLocator locator) Initializes a new DataSource instance from a specific MediaLocator.

Method Summary

Modifier and Type	Method and Description
protected Video4Linux2Stream	createStream(int streamIndex, javax.media.control.FormatControl formatControl) Creates a new PullBufferStream which is to be at a specific zero-based index in the list of streams of this PullBufferDataSource.
protected void	doConnect() Opens a connection to the media source specified by the MediaLocator of this DataSource.
protected void	doDisconnect() Closes the connection to the media source specified by the MediaLocator of this DataSource.
static int	getFFmpegPixFmt(int v4l2PixFmt) Gets the Video for Linux Two API Specification pixel format matching a specific FFmpeg pixel format.
static int	getV4L2PixFmt(int ffmpegPixFmt) Gets the FFmpeg pixel format matching a specific Video for Linux Two API Specification pixel format.

Methods inherited from class org.jitsi.impl.neomedia.jmfext.media.protocol.AbstractVideoPullBufferCaptureDevice

createFrameRateControl

Methods inherited from class org.jitsi.impl.neomedia.jmfext.media.protocol.AbstractPullBufferCaptureDevice

connect, disconnect, doStart, doStop, getCaptureDeviceInfo, getContentType, getControl, getControls, getDuration, getFormat, getFormatControls, getStreams, getStreamSyncRoot, getSupportedFormats, setCaptureDeviceInfo, setFormat, start, stop, streams

Methods inherited from class javax.media.protocol.DataSource

getLocator, initCheck, setLocator

Methods inherited from class java.lang.Object

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

Constructor Detail

DataSource

public DataSource()

Initializes a new DataSource instance.

DataSource

public DataSource(javax.media.MediaLocator locator)

Initializes a new DataSource instance from a specific MediaLocator.

Parameters:

locator - the MediaLocator to create the new instance from

Method Detail

createStream

protected Video4Linux2Stream createStream(int streamIndex,
                                          javax.media.control.FormatControl formatControl)

Creates a new PullBufferStream which is to be at a specific zero-based index in the list of streams of this PullBufferDataSource. The Format-related information of the new instance is to be abstracted by a specific FormatControl.

Specified by:

createStream in class AbstractPullBufferCaptureDevice

Parameters:

streamIndex - the zero-based index of the PullBufferStream in the list of streams of this PullBufferDataSource

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

Returns:

a new PullBufferStream which is to be at the specified streamIndex in the list of streams of this PullBufferDataSource and which has its Format-related information abstracted by the specified formatControl

doConnect

protected void doConnect()
                  throws IOException

Opens a connection to the media source specified by the MediaLocator of this DataSource.

Overrides:

doConnect in class AbstractPullBufferCaptureDevice

Throws:

IOException - if anything goes wrong while opening the connection to the media source specified by the MediaLocator of this DataSource

See Also:

AbstractPullBufferCaptureDevice.doConnect()

doDisconnect

protected void doDisconnect()

Closes the connection to the media source specified by the MediaLocator of this DataSource.

Overrides:

doDisconnect in class AbstractPullBufferCaptureDevice

getFFmpegPixFmt

public static int getFFmpegPixFmt(int v4l2PixFmt)

Gets the Video for Linux Two API Specification pixel format matching a specific FFmpeg pixel format.

Parameters:

v4l2PixFmt - the FFmpeg pixel format to get the matching Video for Linux Two API Specification pixel format of

Returns:

the Video for Linux Two API Specification pixel format matching the specified FFmpeg format

getV4L2PixFmt

public static int getV4L2PixFmt(int ffmpegPixFmt)

Gets the FFmpeg pixel format matching a specific Video for Linux Two API Specification pixel format.

Parameters:

ffmpegPixFmt - the Video for Linux Two API Specification pixel format to get the matching FFmpeg pixel format of

Returns:

the FFmpeg pixel format matching the specified Video for Linux Two API Specification pixel format