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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Sat May 20 18:57:50 PDT 2000 --><TITLE>: Interface FramePositioningControl</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT ID="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT ID="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT ID="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT ID="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT ID="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT ID="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../javax/media/control/FrameGrabbingControl.html"><B>PREV CLASS</B></A> <A HREF="../../../javax/media/control/FrameProcessingControl.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="FramePositioningControl.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#field_summary">FIELD</A> | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javax.media.control</FONT><BR>Interface FramePositioningControl</H2><HR><DL><DT>public interface <B>FramePositioningControl</B><DT>extends <A HREF="../../../javax/media/Control.html">Control</A></DL><P>The <code>FramePositioningControl</code> is the interface to control precise positioning to a video frame for <code>Players</code> and <code>Processors</code>. <p> Frame numbers for a bounded movie should generally begin with 0, corresponding to media time 0. Each video frame of a movie should have a unique frame number that is one bigger than the previous frame. <p> There is a direct mapping between the frame number and the media time of a video frame; although not all <code>Players</code> can compute that relationship. For <code>Players</code> that can compute that relationship, the <code>mapFrameToTime</code> and <code>mapTimeToFrame</code> methods can be used. <p> When a <code>Player</code> is seeked or skipped to a new video frame, the media time of the <code>Player</code> will be changed to the media time of the corresponding video frame. A <code>MediaTimeSetEvent</code> will be sent.<P><DL><DT><B>Since: </B><DD>JMF 2.0</DD></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/control/FramePositioningControl.html#FRAME_UNKNOWN">FRAME_UNKNOWN</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../javax/media/Time.html">Time</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/control/FramePositioningControl.html#TIME_UNKNOWN">TIME_UNKNOWN</A></B></CODE><BR> </TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../javax/media/Time.html">Time</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/control/FramePositioningControl.html#mapFrameToTime(int)">mapFrameToTime</A></B>(int frameNumber)</CODE><BR> Converts the given frame number to the corresponding media time.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/control/FramePositioningControl.html#mapTimeToFrame(javax.media.Time)">mapTimeToFrame</A></B>(<A HREF="../../../javax/media/Time.html">Time</A> mediaTime)</CODE><BR> Converts the given media time to the corresponding frame number.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/control/FramePositioningControl.html#seek(int)">seek</A></B>(int frameNumber)</CODE><BR> Seek to a given video frame.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/control/FramePositioningControl.html#skip(int)">skip</A></B>(int framesToSkip)</CODE><BR> Skip a given number of frames from the current position.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_javax.media.Control"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from interface javax.media.<A HREF="../../../javax/media/Control.html">Control</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../javax/media/Control.html#getControlComponent()">getControlComponent</A></CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><A NAME="field_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Field Detail</B></FONT></TD></TR></TABLE><A NAME="TIME_UNKNOWN"><!-- --></A><H3>TIME_UNKNOWN</H3><PRE>public static final <A HREF="../../../javax/media/Time.html">Time</A> <B>TIME_UNKNOWN</B></PRE><DL></DL><HR><A NAME="FRAME_UNKNOWN"><!-- --></A><H3>FRAME_UNKNOWN</H3><PRE>public static final int <B>FRAME_UNKNOWN</B></PRE><DL></DL><!-- ========= CONSTRUCTOR DETAIL ======== --><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="seek(int)"><!-- --></A><H3>seek</H3><PRE>public int <B>seek</B>(int frameNumber)</PRE><DL><DD>Seek to a given video frame. <p> The <code>Player</code> (or <code>Processor</code>) will attempt to jump to the given frame. The frame that the <code>Player</code> actually jumped to will be returned. <p> The media time of the <code>Player</code> will be updated to reflect the new position set. A <code>MediaTimeSetEvent</code> will be sent. <p> This method can be called on a stopped or started <code>Player</code>. Like <code>setMediaTime</code>, if the <code>Player</code> is in the <i>Started</i> state, this method may cause the <code>Player</code> to change states. If that happens, the appropriate <code>TransitionEvents</code> will be posted by the <code>Player</code> when its state changes. <p><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>frameNumber</CODE> - the frame to seek to.<DT><B>Returns:</B><DD>the actual frame that the Player has seeked to.</DL></DD></DL><HR><A NAME="skip(int)"><!-- --></A><H3>skip</H3><PRE>public int <B>skip</B>(int framesToSkip)</PRE><DL><DD>Skip a given number of frames from the current position. <p> The <code>Player</code> (or <code>Processor</code>) will attempt to skip the given number of frames relative to the current position. The actual number of frames skipped will be returned. <p> The media time of the <code>Player</code> will be updated to reflect the new position set. A <code>MediaTimeSetEvent</code> will be sent. <p> This method can be called on a stopped or started <code>Player</code>. If the <code>Player</code> is in the <i>Started</i> state, the current position is not exact/well-defined. Hence, the frame actually skipped to will not be exact. <p> Like <code>setMediaTime</code>, if the <code>Player</code> is in the <i>Started</i> state, this method may cause the <code>Player</code> to change states. If that happens, the appropriate <code>TransitionEvents</code> will be posted by the <code>Player</code> when its state changes. <p><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>framesToSkip</CODE> - the number of frames to skip from the current position. If framesToSkip is positive, it will seek forward by framesToSkip number of frames. If framesToSkip is negative, it will seek backward by framesToSkip number of frames. e.g. skip(-1) will step backward one frame.<DT><B>Returns:</B><DD>the actual number of frames skipped.</DL></DD></DL><HR><A NAME="mapFrameToTime(int)"><!-- --></A><H3>mapFrameToTime</H3><PRE>public <A HREF="../../../javax/media/Time.html">Time</A> <B>mapFrameToTime</B>(int frameNumber)</PRE><DL><DD>Converts the given frame number to the corresponding media time. <p><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>frameNumber</CODE> - the input frame number for the conversion.<DT><B>Returns:</B><DD>the converted media time for the given frame. If the conversion fails, TIME_UNKNOWN is returned.</DL></DD></DL><HR><A NAME="mapTimeToFrame(javax.media.Time)"><!-- --></A><H3>mapTimeToFrame</H3><PRE>public int <B>mapTimeToFrame</B>(<A HREF="../../../javax/media/Time.html">Time</A> mediaTime)</PRE><DL><DD>Converts the given media time to the corresponding frame number. <p> The frame returned is the nearest frame that has a media time less than or equal to the given media time. <p><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>mediaTime</CODE> - the input media time for the conversion.<DT><B>Returns:</B><DD>the converted frame number the given media time. If the conversion fails, FRAME_UNKNOWN is returned.</DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT ID="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT ID="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT ID="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT ID="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT ID="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT ID="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../javax/media/control/FrameGrabbingControl.html"><B>PREV CLASS</B></A> <A HREF="../../../javax/media/control/FrameProcessingControl.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="FramePositioningControl.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#field_summary">FIELD</A> | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><font size="-1"> <a href="mailto:jmf-bugs@sun.com">Submit a bug or feature</a> <br>Copyright 1999-2000 Sun Microsystems, Inc. 901 San Antonio Road, Palo Alto, California, 94303, U.S.A. All Rights Reserved. See the <a href="spec-license.html">Specification License</a> for more details. <br>Sun, Sun Microsystems, and Java are trademarks or registered trademarks of Sun Microsystems, Inc. in the US and other countries.</font></BODY></HTML>
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