Short URL: http://html5.org/r/3012
| SVN | Bug | Comment | Time (UTC) |
|---|---|---|---|
| 3012 | 2009-04-28 22:38 |
Index: source
===================================================================
--- source (revision 3011)
+++ source (revision 3012)
@@ -22672,33 +22672,38 @@
<dt><dfn title="dom-media-HAVE_CURRENT_DATA"><code>HAVE_CURRENT_DATA</code></dfn> (numeric value 2)</dt>
<dd>Data for the immediate <span>current playback position</span>
- is available, but not enough data is available that the user agent
- could successfully advance the <span>current playback
- position</span> at all without immediately reverting to the <code
- title="dom-media-HAVE_METADATA">HAVE_METADATA</code> state. For
- example, in video this corresponds to the user agent having data
- from the current frame, but not the next frame.</dd>
+ is available, but either not enough data is available that the user
+ agent could successfully advance the <span>current playback
+ position</span> in the <span>direction of playback</span> at all
+ without immediately reverting to the <code
+ title="dom-media-HAVE_METADATA">HAVE_METADATA</code> state, or
+ there is no more data to obtain in the <span>direction of
+ playback</span>. For example, in video this corresponds to the user
+ agent having data from the current frame, but not the next frame;
+ and to when <span title="ended playback">playback has
+ ended</span>.</dd>
<dt><dfn title="dom-media-HAVE_FUTURE_DATA"><code>HAVE_FUTURE_DATA</code></dfn> (numeric value 3)</dt>
<dd>Data for the immediate <span>current playback position</span>
is available, as well as enough data for the user agent to advance
- the <span>current playback position</span> at least a little
- without immediately reverting to the <code
- title="dom-media-HAVE_METADATA">HAVE_METADATA</code> state. For
- example, In video this corresponds to the user agent having data
- for at least the current frame and the next frame.</dd>
+ the <span>current playback position</span> in the <span>direction
+ of playback</span> at least a little without immediately reverting
+ to the <code title="dom-media-HAVE_METADATA">HAVE_METADATA</code>
+ state. For example, in video this corresponds to the user agent
+ having data for at least the current frame and the next frame. The
+ user agent cannot be in this state if <span title="ended
+ playback">playback has ended</span>, as the <span>current playback
+ position</span> can never advanced in this case.</dd>
<dt><dfn title="dom-media-HAVE_ENOUGH_DATA"><code>HAVE_ENOUGH_DATA</code></dfn> (numeric value 4)</dt>
- <dd>Data for the immediate <span>current playback position</span>
- is available, as well as enough data for the user agent to advance
- the <span>current playback position</span> at least a little
- without immediately reverting to the <code
- title="dom-media-HAVE_METADATA">HAVE_METADATA</code> state, and,
- in addition, the user agent estimates that data is being fetched at
- a rate where the <span>current playback position</span>, if it were
- to advance at the rate given by the <code
+ <dd>All the conditions described for the <code
+ title="dom-media-HAVE_FUTURE_DATA">HAVE_FUTURE_DATA</code> state
+ are met, and, in addition, the user agent estimates that data is
+ being fetched at a rate where the <span>current playback
+ position</span>, if it were to advance at the rate given by the
+ <code
title="dom-media-defaultPlaybackRate">defaultPlaybackRate</code>
attribute, would not overtake the available data before playback
reaches the end of the <span>media resource</span>.</dd>
@@ -23063,14 +23068,18 @@
playback</dfn> when the element's <code
title="dom-media-readyState">readyState</code> attribute is <code
title="dom-media-HAVE_METADATA">HAVE_METADATA</code> or greater, and
- the <span>current playback position</span> is the end of the
- <span>media resource</span>, and the <span>media element</span> does
+ either the <span>current playback position</span> is the end of the
+ <span>media resource</span> and the <span>direction of
+ playback</span> is forwards and the <span>media element</span> does
not have a <code title="attr-media-loop">loop</code> attribute
- specified.</p>
+ specified, or the <span>current playback position</span> is the
+ <var>earliest possible position</var> and the <span>direction of
+ playback</span> is backwards.</p>
<p>The <dfn title="dom-media-ended"><code>ended</code></dfn>
attribute must return true if the <span>media element</span> has
- <span>ended playback</span>, and false otherwise.</p>
+ <span>ended playback</span> and the <span>direction of
+ playback</span> is forwards, and false otherwise.</p>
<p>A <span>media element</span> is said to have <dfn>stopped due to
errors</dfn> when the element's <code
@@ -23117,8 +23126,9 @@
the element.</p>
<p>When the <span>current playback position</span> reaches the end
- of the <span>media resource</span>, then the user agent must follow
- these steps:</p>
+ of the <span>media resource</span> when the <span>direction of
+ playback</span> is forwards, then the user agent must follow these
+ steps:</p>
<ol>
@@ -23147,6 +23157,21 @@
</ol>
+ <p>When the <span>current playback position</span> reaches the
+ <var>earliest possible position</var> of the <span>media
+ resource</span> when the <span>direction of playback</span> is
+ backwards, then the user agent must follow these steps:</p>
+
+ <ol>
+
+ <li><p>Stop playback.</p></li>
+
+ <li><p>The user agent must <span>queue a task</span> to <span>fire
+ a simple event</span> called <code
+ title="event-timeupdate">timeupdate</code> at the element.</p></li>
+
+ </ol>
+
<p>The <dfn
title="dom-media-defaultPlaybackRate"><code>defaultPlaybackRate</code></dfn>
attribute gives the desired speed at which the <span>media
@@ -23168,6 +23193,10 @@
value, and the playback must change speed (if the element is
<span>potentially playing</span>).</p>
+ <p>If the <code title="dom-media-playbackRate">playbackRate</code>
+ is positive or zero, then the <dfn>direction of playback</dfn> is
+ forwards. Otherwise, it is backwards.</p>
+
<p>The "play" function in a user agent's interface must set the
<code title="dom-media-playbackRate">playbackRate</code> attribute
to the value of the <code