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JMF原版英文说明文档

 be used in place of the original <code>DataSource</code>.  Any
 attempt to use the original <code>DataSource</code> may generate
 unpredictable results.
 <br>
 The resulted cloneable <code>DataSource</code> can be used to
 generate clones.  The clones generated may or may not has the
 same properties of the original DataSource depending on the
 implementation.  Therefore, they should be checked against the
 properties required for the application.  If the original
 <code>DataSource</code> is not SourceCloneable and a "proxy"
 <code>DataSource</code> is resulted, the clones generated from
 this "proxy" <code>DataSource</code> is of type
 <code>PushDataSource or PushBufferDataSource</code> depending on 
 the type of the original <code>DataSource</code>.  In this case,
 each clone pushes data at the same rate that the original 
 <code>DataSource</code> is pulled or pushed.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the DataSource to be cloned<DT><B>Returns:</B><DD>a cloneable DataSource for the given source<DT><B>See Also: </B><DD><A HREF="../../javax/media/protocol/SourceCloneable.html"><CODE>SourceCloneable</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getSystemTimeBase()"><!-- --></A><H3>
getSystemTimeBase</H3>
<PRE>
public static <A HREF="../../javax/media/TimeBase.html">TimeBase</A> <B>getSystemTimeBase</B>()</PRE>
<DL>
<DD>Get the time-base object for the system.<DD><DL>
<DT><B>Returns:</B><DD>The system time base.</DL>
</DD>
</DL>
<HR>

<A NAME="createDataSink(javax.media.protocol.DataSource, javax.media.MediaLocator)"><!-- --></A><H3>
createDataSink</H3>
<PRE>
public static <A HREF="../../javax/media/DataSink.html">DataSink</A> <B>createDataSink</B>(<A HREF="../../javax/media/protocol/DataSource.html">DataSource</A>&nbsp;datasource,
                                      <A HREF="../../javax/media/MediaLocator.html">MediaLocator</A>&nbsp;destLocator)
                               throws <A HREF="../../javax/media/NoDataSinkException.html">NoDataSinkException</A></PRE>
<DL>
<DD>Create a <code>DataSink</code> for the specified input
 Datasource and destination  Medialocator.
 <p>
 
 The algorithm for creating a <CODE>DataSink</CODE> from
 a <code>MediaLocator and datasource </code> is:
 <ol>
 <li>Get the protocol from the <code>MediaLocator</code>.
 <li>Get a list of <code>MediaHandler</code> classes  within the
 datasink package that support the
 protocol, using the content package-prefix-list.
 i.e. search for content-prefix.media.datasink.protocol.Handler
 <li>For each <code>MediaHandler</code> class in the list:
 <ol>
 <li>Instantiate a new <code>MediaHandler</code>.
 <li>If the <code>MediaHandler</code> is a
 <code>DataSink</code>,
 Attach the source to the <code>MediaHandler</code> by calling
 <code>MediaHandler.setSource</code>
 <li>If there are no failures, return this
 <code>DataSink</code>;otherwise try the next
 <code>MediaHandler</code> in the list.
 
 <li>If the <code>MediaHandler</code> is a <code>DataSinkProxy</code>,
 obtain the content type of the proxy using the getContentType() method.
 Now obtain a list of <code>MediaHandlers</code> that support
 the protocol of the Medialocator and the content type returned by
 the proxy <BR> 
 i.e. look for content-prefix.media.datasink.protocol.content-type.Handler 
 <li>If a <code>MediaHandler</code> is found and it is a
 DataSink, attach the datasource  
 to it by calling <code>MediaHandler.setSource</code>.<BR>
 <li>Return the <code>DataSink</code> if there are no errors.

 <li>If no <code>MediaHandler</code> is found, or if there are
 any errors,try the next  <code>MediaHandler</code in the list.
 </ol>
 <li>If no <code>DataSink</code> is found after trying all of the handlers,
 a <CODE>NoDataSinkException</CODE> is thrown.
 </ol>
 </ol><DD><DL>
<DT><B>Parameters:</B><DD><CODE>datasource</CODE> - The input <CODE>DataSource</CODE> to the DataSink<DD><CODE>destLocator</CODE> - A <CODE>MediaLocator</CODE> that describes
 the destination of the media to be handled by the datasink<DT><B>Returns:</B><DD>A <CODE>DataSink</CODE> for the media described by the
 destLocator and that supports the datasource .<DT><B>Throws:</B><DD><A HREF="../../javax/media/NoDataSinkException.html">NoDataSinkException</A> - Thrown if no <CODE>DataSink</CODE> can
 be found.<DT><B>See Also: </B><DD><A HREF="../../javax/media/NoDataSinkException.html"><CODE>NoDataSinkException</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getCacheDirectory()"><!-- --></A><H3>
getCacheDirectory</H3>
<PRE>
public static java.lang.String <B>getCacheDirectory</B>()</PRE>
<DL>
<DD>Retrieve the directory that's used for playback caching.<DD><DL>
<DT><B>Returns:</B><DD>the directory that's used for playback caching,
 		null if the directory is not specified.</DL>
</DD>
</DL>
<HR>

<A NAME="setHint(int, java.lang.Object)"><!-- --></A><H3>
setHint</H3>
<PRE>
public static void <B>setHint</B>(int&nbsp;hint,
                           java.lang.Object&nbsp;value)</PRE>
<DL>
<DD>Specify a hint for the <code>Manager</code> to use.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>hint</CODE> - The name of the hint to be set.<DD><CODE>value</CODE> - The value the hint is to be set.<DT><B>See Also: </B><DD><A HREF="../../javax/media/Manager.html#MAX_SECURITY"><CODE>MAX_SECURITY</CODE></A>, 
<A HREF="../../javax/media/Manager.html#CACHING"><CODE>CACHING</CODE></A>, 
<A HREF="../../javax/media/Manager.html#LIGHTWEIGHT_RENDERER"><CODE>LIGHTWEIGHT_RENDERER</CODE></A>, 
<A HREF="../../javax/media/Manager.html#PLUGIN_PLAYER"><CODE>PLUGIN_PLAYER</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getHint(int)"><!-- --></A><H3>
getHint</H3>
<PRE>
public static java.lang.Object <B>getHint</B>(int&nbsp;hint)</PRE>
<DL>
<DD>Retrieve the value of a hint set.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>hint</CODE> - The name of the hint.<DT><B>Returns:</B><DD>The value of the hint.<DT><B>See Also: </B><DD><A HREF="../../javax/media/Manager.html#MAX_SECURITY"><CODE>MAX_SECURITY</CODE></A>, 
<A HREF="../../javax/media/Manager.html#CACHING"><CODE>CACHING</CODE></A>, 
<A HREF="../../javax/media/Manager.html#LIGHTWEIGHT_RENDERER"><CODE>LIGHTWEIGHT_RENDERER</CODE></A>, 
<A HREF="../../javax/media/Manager.html#PLUGIN_PLAYER"><CODE>PLUGIN_PLAYER</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getDataSourceList(java.lang.String)"><!-- --></A><H3>
getDataSourceList</H3>
<PRE>
public static java.util.Vector <B>getDataSourceList</B>(java.lang.String&nbsp;protocolName)</PRE>
<DL>
<DD>Build a list of <CODE>DataSource</CODE> class names from the
 protocol prefix-list and a protocol name.
 <p>
 The first name in the list will always be:
 <blockquote><pre>
 media.protocol.&lt;protocol&gt;DataSource
 </pre></blockquote>
 <p>

 Each additional name looks like:
 <blockquote><pre>
 &lt;protocol-prefix&gt;.media.protocol.&lt;protocol&gt;.DataSource
 </pre></blockquote>
 for every <CODE>&lt;protocol-prefix&gt;</CODE> in the
 protocol-prefix-list.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>protocol</CODE> - The name of the protocol the source must
 support.<DT><B>Returns:</B><DD>A vector of strings, where each string is
 a <CODE>Player</CODE> class-name.</DL>
</DD>
</DL>
<HR>

<A NAME="getHandlerClassList(java.lang.String)"><!-- --></A><H3>
getHandlerClassList</H3>
<PRE>
public static java.util.Vector <B>getHandlerClassList</B>(java.lang.String&nbsp;contentName)</PRE>
<DL>
<DD>Build a list of Player <CODE>Handler</CODE> classes from the
 content-prefix-list and a content name.
 <p>
 The first name in the list will always be:
 <blockquote><pre>
 media.content.&lt;contentType&gt;.Handler
 </pre></blockquote>
 <p>

 Each additional name looks like:
 <blockquote><pre>
 &lt;content-prefix&gt;.media.content.&lt;contentName&gt;.Player
 </pre></blockquote>
 for every <CODE>&lt;content-prefix&gt;</CODE> in the
 content-prefix-list.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>contentName</CODE> - The content type to use in the class name.<DT><B>Returns:</B><DD>A vector of strings where each one is a <CODE>Player</CODE>
 class-name.</DL>
</DD>
</DL>
<HR>

<A NAME="getProcessorClassList(java.lang.String)"><!-- --></A><H3>
getProcessorClassList</H3>
<PRE>
public static java.util.Vector <B>getProcessorClassList</B>(java.lang.String&nbsp;contentName)</PRE>
<DL>
<DD>Build a list of Processor <CODE>Handler</CODE> classes from the
 content-prefix-list and a content name.
 <p>
 The first name in the list will always be:
 <blockquote><pre>
 media.processor.&lt;contentType&gt;.Handler
 </pre></blockquote>
 <p>

 Each additional name looks like:
 <blockquote><pre>
 &lt;content-prefix&gt;.media.processor.&lt;contentName&gt;.Processor
 </pre></blockquote>
 for every <CODE>&lt;content-prefix&gt;</CODE> in the
 content-prefix-list.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>contentName</CODE> - The content type to use in the class name.<DT><B>Returns:</B><DD>A vector of strings where each one is a <CODE>Processor</CODE>
 class-name.</DL>
</DD>
</DL>
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