File	Doc	Category	Size	Date	Package
RTPPushDataSource.java	API Doc	JMF 2.1.1e	6822	Mon May 12 12:20:40 BST 2003	javax.media.rtp

RTPPushDataSource

• java.lang.Object
  • javax.media.protocol.DataSource
    • javax.media.protocol.PushDataSource

Fields Summary
PushSourceStream	outputstream The output stream of this socket. Implements javax.media.protocol.PushSourceStream. Data on this stream is transferrred to the SourceTransferHandler
OutputDataStream	inputstream The input stream of this socket. Data on this stream is sent out on the wire using the underlying network/transport protocol Implements javax.media.rtp.OutputDataStream
String	contentType The content type of this socket. needs to be set by the creator of this datasocket before a player can be created for this datasource.
private boolean	connected Used to ensure that DataSource methods like getContentType() cannot be called till this datasource has been connected.
private boolean	started Used to check if the datasource has been started. This will initiate data transfer to and from this data source
DataSource	childsrc The actual datasource created by the RTPSM and passed to the handler
private RTPControl	rtpcontrol The RTPControl interface that is exported by this datasource and will be used to configure information for this datasource

Constructors Summary
public RTPPushDataSource() // since we cannot access the RTPControlImpl class in the // javax.media packages, we will load the class based on the // classname Class eClass = null; try{ eClass = Class.forName("com.sun.media.rtp.RTPControlImpl"); rtpcontrol = (RTPControl) eClass.newInstance(); }catch (Exception e){ rtpcontrol = null; }

Methods Summary
public void	connect() Set the boolean to true and dont do anything else in connect for now connected = true; if (childsrc != null) childsrc.connect();
public void	disconnect() Set the boolean to false and dont do anything else in connect for now connected = false; if (childsrc != null) childsrc.disconnect();
public java.lang.String	getContentType() Implementation of javax.media.protocol.DataSource.getContentType() if (!connected){ System.err.println("Error: DataSource not connected"); return null; } return ContentDescriptor.mimeTypeToPackageName(contentType);
public java.lang.Object	getControl(java.lang.String controlName) Returns null because no controls are implemented. return null. if (controlName.equals("javax.media.rtp.RTPControl")) return rtpcontrol; return null;
public java.lang.Object[]	getControls() Returns an zero length array because no controls are supported. return a zero length Object array. // return a one element array of rtpcontrol object RTPControl[] controls = new RTPControl[1]; controls[0] = rtpcontrol; return controls;
public javax.media.Time	getDuration() Returns null since the duration of the streams of this datasource are not known return null;
public javax.media.rtp.OutputDataStream	getInputStream() Method to retrieve the input stream of this two way data source return inputstream;
public javax.media.protocol.PushSourceStream	getOutputStream() Method to retrive the output stream of this two way data source return outputstream;
public javax.media.protocol.PushSourceStream[]	getStreams() PushSourceStream[] outstream = new PushSourceStream[1]; outstream[0]= outputstream; return outstream;
protected void	initCheck() This two way data source does not have any medialocator and datasource will throw an Uninitialized DataSource error incase initCheck() is called on this datasource. So, here this method is overrident to esnure that no errors are thrown and in the absence of a MediaLocator, nothing is done for now
public boolean	isStarted() Method to find out if the source had been started return started;
public void	setChild(javax.media.protocol.DataSource source) childsrc = source;
public void	setContentType(java.lang.String contentType) Method used to set the content type of this two way data source this.contentType = contentType;
public void	setInputStream(javax.media.rtp.OutputDataStream inputstream) Method to set the input stream of this two way data source this.inputstream = inputstream;
public void	setOutputStream(javax.media.protocol.PushSourceStream outputstream) Method to set the output stream of this two way data source this.outputstream = outputstream;
public void	start() Initiates data-transfer. Start must be called before data is available. Connect must be called before start. exception IOException thrown if the source has IO trouble at startup time. if (!connected) return; started = true; if (childsrc != null) childsrc.start();
public void	stop() Stops data-transfer. If the source has not already been connected and started, stop does nothing. if ((!connected) && (!started)) return; started = false; if (childsrc != null) childsrc.stop();