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

Class DataSource

java.lang.Object

javax.media.protocol.DataSource

javax.media.protocol.PushBufferDataSource

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

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

All Implemented Interfaces:

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

public class DataSource
extends AbstractPushBufferCaptureDevice

Implements a CaptureDevice which provides silence in the form of audio media.

Author:

Lyubomir Marinov, Pawel Domas

Field Summary

Fields

Modifier and Type	Field and Description
static String	NO_TRANSFER_DATA The optional MediaLocator remainder to indicate to DataSource and its associated AudioSilenceStream that BufferTransferHandler.transferData(PushBufferStream) is to not be invoked.
static javax.media.Format[]	SUPPORTED_FORMATS The list of Formats supported by the AudioSilenceCaptureDevice instances.

Fields inherited from interface javax.media.Duration

DURATION_UNBOUNDED, DURATION_UNKNOWN

Constructor Summary

Constructors

Constructor and Description
DataSource()

Method Summary

Modifier and Type	Method and Description
protected org.jitsi.impl.neomedia.jmfext.media.protocol.audiosilence.DataSource.AudioSilenceStream	createStream(int streamIndex, javax.media.control.FormatControl formatControl) Create a new PushBufferStream which is to be at a specific zero-based index in the list of streams of this PushBufferDataSource.
protected javax.media.Format[]	getSupportedFormats(int streamIndex) Gets the Formats which are to be reported by a FormatControl as supported formats for a PushBufferStream at a specific zero-based index in the list of streams of this PushBufferDataSource.

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

connect, createFrameRateControl, disconnect, doConnect, doDisconnect, doStart, doStop, getCaptureDeviceInfo, getContentType, getControl, getControls, getDuration, getFormat, getFormatControls, getStreams, getStreamSyncRoot, 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

Field Detail

NO_TRANSFER_DATA

public static final String NO_TRANSFER_DATA

The optional MediaLocator remainder to indicate to DataSource and its associated AudioSilenceStream that BufferTransferHandler.transferData(PushBufferStream) is to not be invoked. If true, then the DataSource is a dummy suitable for scenarios in which an capature device is required but no audio samples from it are necessary such as negotiating signaling for audio but actually RTP translating other participants/peers' audio.

See Also:

Constant Field Values

SUPPORTED_FORMATS

public static final javax.media.Format[] SUPPORTED_FORMATS

The list of Formats supported by the AudioSilenceCaptureDevice instances.

Constructor Detail

DataSource

public DataSource()

Method Detail

createStream

protected org.jitsi.impl.neomedia.jmfext.media.protocol.audiosilence.DataSource.AudioSilenceStream createStream(int streamIndex,
                                                                                                                javax.media.control.FormatControl formatControl)

Create a new PushBufferStream which is to be at a specific zero-based index in the list of streams of this PushBufferDataSource. The Format-related information of the new instance is to be abstracted by a specific FormatControl. Implements AbstractPushBufferCaptureDevice.createStream(int, FormatControl).

Specified by:

createStream in class AbstractPushBufferCaptureDevice

Parameters:

streamIndex - the zero-based index of the PushBufferStream in the list of streams of this PushBufferDataSource

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

Returns:

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

getSupportedFormats

protected javax.media.Format[] getSupportedFormats(int streamIndex)

Gets the Formats which are to be reported by a FormatControl as supported formats for a PushBufferStream at a specific zero-based index in the list of streams of this PushBufferDataSource. Overrides the super implementation in order to return the list of Formats hardcoded as supported in AudioSilenceCaptureDevice because the super looks them up by CaptureDeviceInfo and this instance does not have one.

Overrides:

getSupportedFormats in class AbstractPushBufferCaptureDevice

Parameters:

streamIndex - the zero-based index of the PushBufferStream for which the specified FormatControl is to report the list of supported Formats

Returns:

an array of Formats to be reported by a FormatControl as the supported formats for the PushBufferStream at the specified streamIndex in the list of streams of this PushBufferDataSource