html5/spec Overview.html,1.1578,1.1579

Update of /sources/public/html5/spec
In directory hutz:/tmp/cvs-serv8784

Modified Files:
	Overview.html 
Log Message:
Specify how frequently the timeupdate event should fire. (whatwg r2407)

Index: Overview.html
===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.1578
retrieving revision 1.1579
diff -u -d -r1.1578 -r1.1579
--- Overview.html	17 Nov 2008 01:06:30 -0000	1.1578
+++ Overview.html	17 Nov 2008 01:11:59 -0000	1.1579
@@ -14869,12 +14869,20 @@
    steps.</li>
 
    <li><p>If the time was reached through the usual monotonic increase
-   of the current playback position during normal playback, the user
-   agent must then <a href=#queue-a-task>queue a task</a> to <a href=#fire-a-simple-event>fire a simple
-   event</a> called <code title=event-timeupdate><a href=#event-timeupdate>timeupdate</a></code> at the element. (In the
+   of the current playback position during normal playback, and if the
+   user agent has not fired a <code title=event-timeupdate><a href=#event-timeupdate>timeupdate</a></code> event at the element in
+   the past 15 to 250ms, the user agent must then <a href=#queue-a-task>queue a
+   task</a> to <a href=#fire-a-simple-event>fire a simple event</a> called <code title=event-timeupdate><a href=#event-timeupdate>timeupdate</a></code> at the element. (In the
    other cases, such as explicit seeks, relevant events get fired as
    part of the overall process of changing the current playback
-   position.)</li>
+   position.)</p>
+
+   <p class=note>The event thus is not to be fired faster than about
+   66Hz or slower than 4Hz. User agents are encouraged to vary the
+   frequency of the event based on the system load and the average
+   cost of processing the event each time, so that the UI updates are
+   not any more frequent than the user agent can comfortably handle
+   while decoding the video.</li>
 
    <li><p>If the time was reached through the usual monotonic increase
    of the current playback position during normal playback, and there

Received on Monday, 17 November 2008 01:12:10 UTC