[html5] r2407 - [gow] (2) Specify how frequently the timeupdate event should fire.

[whatwg at whatwg.org]

Author: ianh
Date: 2008-11-16 17:11:55 -0800 (Sun, 16 Nov 2008)
New Revision: 2407

Modified:
   index
   source
Log:
[gow] (2) Specify how frequently the timeupdate event should fire.

Modified: index
===================================================================
--- index	2008-11-17 01:06:24 UTC (rev 2406)
+++ index	2008-11-17 01:11:55 UTC (rev 2407)
@@ -18161,13 +18161,21 @@
    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
    are <a href=#cue-range title="cue range">cue ranges</a> in <var title="">other ranges</var> that have both their "active" boolean

Modified: source
===================================================================
--- source	2008-11-17 01:06:24 UTC (rev 2406)
+++ source	2008-11-17 01:11:55 UTC (rev 2407)
@@ -19671,14 +19671,23 @@
    steps.</p></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 <span>queue a task</span> to <span>fire a simple
-   event</span> called <code
+   of the current playback position during normal playback, and if the
+   user agent has not fired a <code
+   title="event-timeupdate">timeupdate</code> event at the element in
+   the past 15 to 250ms, the user agent must then <span>queue a
+   task</span> to <span>fire a simple event</span> called <code
    title="event-timeupdate">timeupdate</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.)</p></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.</p></li>
+
    <li><p>If the time was reached through the usual monotonic increase
    of the current playback position during normal playback, and there
    are <span title="cue range">cue ranges</span> in <var