org.jitsi.impl.neomedia.protocol

Class CaptureDeviceDelegatePullBufferDataSource

java.lang.Object

javax.media.protocol.DataSource

javax.media.protocol.PullBufferDataSource

org.jitsi.impl.neomedia.protocol.CaptureDeviceDelegatePullBufferDataSource

All Implemented Interfaces:

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

Direct Known Subclasses:

PullBufferDataSourceDelegate

public class CaptureDeviceDelegatePullBufferDataSource
extends javax.media.protocol.PullBufferDataSource
implements javax.media.protocol.CaptureDevice

Represents a PullBufferDataSource which is also a CaptureDevice through delegation to a specific CaptureDevice.

Author:

Damian Minkov, Lubomir Marinov

Field Summary

Fields

Modifier and Type	Field and Description
protected javax.media.protocol.CaptureDevice	captureDevice The CaptureDevice this instance delegates to in order to implement its CaptureDevice functionality.
protected static javax.media.protocol.PullBufferStream[]	EMPTY_STREAMS The constant which represents an empty array with PullBufferStream element type.

Fields inherited from interface javax.media.Duration

DURATION_UNBOUNDED, DURATION_UNKNOWN

Constructor Summary

Constructors

Constructor and Description
CaptureDeviceDelegatePullBufferDataSource(javax.media.protocol.CaptureDevice captureDevice) Initializes a new CaptureDeviceDelegatePullBufferDataSource instance which delegates to a specific CaptureDevice in order to implement its CaptureDevice functionality.

Method Summary

Modifier and Type	Method and Description
void	connect() Implements CaptureDevice.connect().
void	disconnect() Implements CaptureDevice.disconnect().
javax.media.CaptureDeviceInfo	getCaptureDeviceInfo() Implements CaptureDevice.getCaptureDeviceInfo().
String	getContentType() Implements DataSource.getContentType().
Object	getControl(String controlType) Implements Controls.getControl(String).
Object[]	getControls() Implements Controls.getControls().
javax.media.Time	getDuration() Implements Duration.getDuration().
javax.media.control.FormatControl[]	getFormatControls() Implements CaptureDevice.getFormatControls().
javax.media.protocol.PullBufferStream[]	getStreams() Implements PullBufferDataSource.getStreams().
void	start() Implements CaptureDevice.start().
void	stop() Implements CaptureDevice.start().

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

Field Detail

captureDevice

protected final javax.media.protocol.CaptureDevice captureDevice

The CaptureDevice this instance delegates to in order to implement its CaptureDevice functionality.

EMPTY_STREAMS

protected static final javax.media.protocol.PullBufferStream[] EMPTY_STREAMS

The constant which represents an empty array with PullBufferStream element type. Explicitly defined in order to reduce unnecessary allocations.

Constructor Detail

CaptureDeviceDelegatePullBufferDataSource

public CaptureDeviceDelegatePullBufferDataSource(javax.media.protocol.CaptureDevice captureDevice)

Initializes a new CaptureDeviceDelegatePullBufferDataSource instance which delegates to a specific CaptureDevice in order to implement its CaptureDevice functionality.

Parameters:

captureDevice - the CaptureDevice the new instance is to delegate to in order to provide its CaptureDevice functionality

Method Detail

getStreams

public javax.media.protocol.PullBufferStream[] getStreams()

Implements PullBufferDataSource.getStreams(). Delegates to the wrapped CaptureDevice if it implements PullBufferDataSource; otherwise, returns an empty array with PullBufferStream element type.

Specified by:

getStreams in class javax.media.protocol.PullBufferDataSource

Returns:

an array of PullBufferStreams as returned by the wrapped CaptureDevice if it implements PullBufferDataSource; otherwise, an empty array with PullBufferStream element type

getContentType

public String getContentType()

Implements DataSource.getContentType(). Delegates to the wrapped CaptureDevice if it implements DataSource; otherwise, returns ContentDescriptor.CONTENT_UNKNOWN.

Specified by:

getContentType in class javax.media.protocol.DataSource

Returns:

a String value which describes the content type of the wrapped CaptureDevice if it implements DataSource; otherwise, ContentDescriptor#CONTENT_UNKNOWN

connect

public void connect()
             throws IOException

Implements CaptureDevice.connect(). Delegates to the wrapped CaptureDevice if available; otherwise, does nothing.

Specified by:

connect in interface javax.media.protocol.CaptureDevice

Specified by:

connect in class javax.media.protocol.DataSource

Throws:

IOException - if the wrapped CaptureDevice throws such an exception

disconnect

public void disconnect()

Implements CaptureDevice.disconnect(). Delegates to the wrapped CaptureDevice if available; otherwise, does nothing.

Specified by:

disconnect in interface javax.media.protocol.CaptureDevice

Specified by:

disconnect in class javax.media.protocol.DataSource

start

public void start()
           throws IOException

Implements CaptureDevice.start(). Delegates to the wrapped CaptureDevice if available; otherwise, does nothing.

Specified by:

start in interface javax.media.protocol.CaptureDevice

Specified by:

start in class javax.media.protocol.DataSource

Throws:

IOException - if the wrapped CaptureDevice throws such an exception

stop

public void stop()
          throws IOException

Implements CaptureDevice.start(). Delegates to the wrapped CaptureDevice if available; otherwise, does nothing.

Specified by:

stop in interface javax.media.protocol.CaptureDevice

Specified by:

stop in class javax.media.protocol.DataSource

Throws:

IOException - if the wrapped CaptureDevice throws such an exception

getControl

public Object getControl(String controlType)

Implements Controls.getControl(String). Delegates to the wrapped CaptureDevice if it implements DataSource; otherwise, returns null.

Specified by:

getControl in interface javax.media.Controls

Parameters:

controlType - a String value which names the type of the control to be retrieved

Returns:

an Object which represents the control of the requested controlType of the wrapped CaptureDevice if it implements DataSource; otherwise, null

getControls

public Object[] getControls()

Implements Controls.getControls(). Delegates to the wrapped CaptureDevice if it implements DataSource; otherwise, returns an empty array with Object element type.

Specified by:

getControls in interface javax.media.Controls

Returns:

the array of controls for the wrapped CaptureDevice if it implements DataSource; otherwise, an empty array with Object element type

getDuration

public javax.media.Time getDuration()

Implements Duration.getDuration(). Delegates to the wrapped CaptureDevice if it implements DataSource; otherwise, returns Duration.DURATION_UNKNOWN.

Specified by:

getDuration in interface javax.media.Duration

Returns:

the duration of the wrapped CaptureDevice as returned by its implementation of DataSource if any; otherwise, returns DataSource#DURATION_UNKNOWN

getFormatControls

public javax.media.control.FormatControl[] getFormatControls()

Implements CaptureDevice.getFormatControls(). Delegates to the wrapped CaptureDevice if available; otherwise, returns an empty array with FormatControl element type.

Specified by:

getFormatControls in interface javax.media.protocol.CaptureDevice

Returns:

the array of FormatControls of the wrapped CaptureDevice if available; otherwise, an empty array with FormatControl element type

getCaptureDeviceInfo

public javax.media.CaptureDeviceInfo getCaptureDeviceInfo()

Implements CaptureDevice.getCaptureDeviceInfo(). Delegates to the wrapped CaptureDevice if available; otherwise, returns null.

Specified by:

getCaptureDeviceInfo in interface javax.media.protocol.CaptureDevice

Returns:

the CaptureDeviceInfo of the wrapped CaptureDevice if available; otherwise, null