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

git-svn-id: http://svn.whatwg.org/webapps@2407 340c8d12-0b0e-0410-8428-c7bf67bfef74

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   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

source

   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