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Bug 22112 - Merge appendBuffer and appendStream text
authorAdrian Bateman <adrianba@microsoft.com>
Tue, 09 Jul 2013 08:00:36 -0700
changeset 138 1332018f1f49
parent 137 b98190a4472c
child 139 da3ae92ecee2
Bug 22112 - Merge appendBuffer and appendStream text
media-source/media-source-respec.html
media-source/media-source.html
media-source/media-source.js 
--- a/media-source/media-source-respec.html	Tue Jul 02 09:52:35 2013 -0700
+++ b/media-source/media-source-respec.html	Tue Jul 09 08:00:36 2013 -0700
@@ -1,4 +1,4 @@
-<!DOCTYPE html SYSTEM "about:legacy-compat">
+<!DOCTYPE html SYSTEM "about:legacy-compat">
 <html>
   <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
@@ -878,23 +878,7 @@
 
           <ol class="method-algorithm">
             <li>If <var>data</var> is null then throw an <a def-id="invalid-access-err"></a> exception and abort these steps.</li>
-            <li>If this object has been removed from the <a def-id="sourceBuffers"></a> attribute of the <a def-id="parent-media-source"></a> then throw an <a def-id="invalid-state-err"></a> exception and abort these steps.</li>
-            <li>If the <a def-id="updating"></a> attribute equals true, then throw an <a def-id="invalid-state-err"></a> exception and abort these steps.</li>
-            <li>
-              <p>If the <a def-id="readyState"></a> attribute of the <a def-id="parent-media-source"></a> is in the <a def-id="ended"></a> state then run the following steps:</p>
-              <ol>
-	        <li>Set the <a def-id="readyState"></a> attribute of the <a def-id="parent-media-source"></a> to <a def-id="open"></a>
-                </li>
-	        <li>
-                  <a def-id="Queue-a-task-to-fire-an-event-named"></a> <a def-id="sourceopen"></a> at the <a def-id="parent-media-source"></a> .</li>
-              </ol>
-            </li>
-            <li>Run the <a def-id="coded-frame-eviction-algorithm"></a>.</li>
-            <li>
-              <p>If the <a def-id="buffer-full-flag"></a> equals true, then throw a <a def-id="quota-exceeded-err"></a> exception and abort these step.</p>
-              <p class="note">This is the signal that the implementation was unable to evict enough data to accomodate the append or the append is too big. The web
-                application must use <a def-id="remove"></a> to explicitly free up space and/or reduce the size of the append.</p>
-            </li>
+            <li>Run the <a def-id="prepare-append"></a> algorithm.</li>
             <li>Add <var>data</var> to the end of the <a def-id="input-buffer"></a>.</li>
             <li>Set the <a def-id="updating"></a> attribute to true.</li>
             <li><a def-id="Queue-a-task-to-fire-an-event-named"></a> <a def-id="updatestart"></a> at this <a>SourceBuffer</a> object.</li>
@@ -908,24 +892,7 @@
 
           <ol class="method-algorithm">
             <li>If <var>stream</var> is null then throw an <a def-id="invalid-access-err"></a> exception and abort these steps.</li>
-            <li>If this object has been removed from the <a def-id="sourceBuffers"></a> attribute of the <a def-id="parent-media-source"></a> then throw
-              an <a def-id="invalid-state-err"></a> exception and abort these steps.</li>
-            <li>If the <a def-id="updating"></a> attribute equals true, then throw an <a def-id="invalid-state-err"></a> exception and abort these
-              steps.</li>
-            <li>
-              <p>If the <a def-id="readyState"></a> attribute of the <a def-id="parent-media-source"></a> is in the <a def-id="ended"></a> state then run
-                the following steps:</p>
-              <ol>
-	        <li>Set the <a def-id="readyState"></a> attribute of the <a def-id="parent-media-source"></a> to <a def-id="open"></a></li>
-	        <li><a def-id="Queue-a-task-to-fire-an-event-named"></a> <a def-id="sourceopen"></a> at the <a def-id="parent-media-source"></a> .</li>
-              </ol>
-            </li>
-            <li>Run the <a def-id="coded-frame-eviction-algorithm"></a>.</li>
-            <li>
-              <p>If the <a def-id="buffer-full-flag"></a> equals true, then throw a <a def-id="quota-exceeded-err"></a> exception and abort these step.</p>
-              <p class="note">This is the signal that the implementation was unable to evict enough data to accomodate the append or the append is too big. The web
-                application must use <a def-id="remove"></a> to explicitly free up space and/or reduce the size of the append.</p>
-            </li>
+            <li>Run the <a def-id="prepare-append"></a> algorithm.</li>
             <li>Set the <a def-id="updating"></a> attribute to true.</li>
             <li><a def-id="Queue-a-task-to-fire-an-event-named"></a> <a def-id="updatestart"></a> at this <a>SourceBuffer</a> object.</li>
             <li>Asynchronously run the <a def-id="stream-append-loop"></a> algorithm with <var>stream</var> and <var>maxSize</var>.</li>
@@ -1172,6 +1139,30 @@
           </ol>
         </section>
 
+        <section id="sourcebuffer-prepare-append">
+            <h4>Prepare Append Algorithm</h4>
+            <p>When an append operation begins, the follow steps are run to validate and prepare the <a>SourceBuffer</a>.</p>
+            <ol>
+            <li>If the <a>SourceBuffer</a> has been removed from the <a def-id="sourceBuffers"></a> attribute of the <a def-id="parent-media-source"></a> then throw an <a def-id="invalid-state-err"></a> exception and abort these steps.</li>
+            <li>If the <a def-id="updating"></a> attribute equals true, then throw an <a def-id="invalid-state-err"></a> exception and abort these steps.</li>
+            <li>
+              <p>If the <a def-id="readyState"></a> attribute of the <a def-id="parent-media-source"></a> is in the <a def-id="ended"></a> state then run the following steps:</p>
+              <ol>
+	        <li>Set the <a def-id="readyState"></a> attribute of the <a def-id="parent-media-source"></a> to <a def-id="open"></a>
+                </li>
+	        <li>
+                  <a def-id="Queue-a-task-to-fire-an-event-named"></a> <a def-id="sourceopen"></a> at the <a def-id="parent-media-source"></a> .</li>
+              </ol>
+            </li>
+            <li>Run the <a def-id="coded-frame-eviction-algorithm"></a>.</li>
+            <li>
+              <p>If the <a def-id="buffer-full-flag"></a> equals true, then throw a <a def-id="quota-exceeded-err"></a> exception and abort these step.</p>
+              <p class="note">This is the signal that the implementation was unable to evict enough data to accomodate the append or the append is too big. The web
+                application must use <a def-id="remove"></a> to explicitly free up space and/or reduce the size of the append.</p>
+            </li>
+            </ol>
+        </section>
+
         <section id="sourcebuffer-buffer-append">
           <h4>Buffer Append Algorithm</h4>
           <p>When <a def-id="appendBuffer"></a> is called, the following steps are run to process the appended data.</p>
--- a/media-source/media-source.html	Tue Jul 02 09:52:35 2013 -0700
+++ b/media-source/media-source.html	Tue Jul 09 08:00:36 2013 -0700
@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!DOCTYPE html>
 <html lang="en" dir="ltr">
 <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
@@ -432,7 +432,7 @@
   </p>
   <h1 class="title" id="title">Media Source Extensions</h1>
   
-  <h2 id="w3c-editor-s-draft-02-july-2013"><abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft 02 July 2013</h2>
+  <h2 id="w3c-editor-s-draft-09-july-2013"><abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft 09 July 2013</h2>
   <dl>
     
       <dt>This version:</dt>
@@ -549,7 +549,7 @@
       
     
   
-</section><section id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a><ul class="toc"><li class="tocline"><a href="#goals" class="tocxref"><span class="secno">1.1 </span>Goals</a></li><li class="tocline"><a href="#definitions" class="tocxref"><span class="secno">1.2 </span>Definitions</a></li></ul></li><li class="tocline"><a href="#mediasource" class="tocxref"><span class="secno">2. </span>MediaSource Object</a><ul class="toc"><li class="tocline"><a href="#attributes" class="tocxref"><span class="secno">2.1 </span>Attributes</a></li><li class="tocline"><a href="#methods" class="tocxref"><span class="secno">2.2 </span>Methods</a></li><li class="tocline"><a href="#mediasource-events" class="tocxref"><span class="secno">2.3 </span>Event Summary</a></li><li class="tocline"><a href="#mediasource-algorithms" class="tocxref"><span class="secno">2.4 </span>Algorithms</a><ul class="toc"><li class="tocline"><a href="#mediasource-attach" class="tocxref"><span class="secno">2.4.1 </span>Attaching to a media element</a></li><li class="tocline"><a href="#mediasource-detach" class="tocxref"><span class="secno">2.4.2 </span>Detaching from a media element</a></li><li class="tocline"><a href="#mediasource-seeking" class="tocxref"><span class="secno">2.4.3 </span>Seeking</a></li><li class="tocline"><a href="#buffer-monitoring" class="tocxref"><span class="secno">2.4.4 </span>SourceBuffer Monitoring</a></li><li class="tocline"><a href="#active-source-buffer-changes" class="tocxref"><span class="secno">2.4.5 </span>Changes to selected/enabled track state</a></li><li class="tocline"><a href="#duration-change-algorithm" class="tocxref"><span class="secno">2.4.6 </span>Duration change</a></li><li class="tocline"><a href="#end-of-stream-algorithm" class="tocxref"><span class="secno">2.4.7 </span>End of stream algorithm</a></li></ul></li></ul></li><li class="tocline"><a href="#sourcebuffer" class="tocxref"><span class="secno">3. </span>SourceBuffer Object</a><ul class="toc"><li class="tocline"><a href="#attributes-1" class="tocxref"><span class="secno">3.1 </span>Attributes</a></li><li class="tocline"><a href="#methods-1" class="tocxref"><span class="secno">3.2 </span>Methods</a></li><li class="tocline"><a href="#track-buffers" class="tocxref"><span class="secno">3.3 </span>Track Buffers</a></li><li class="tocline"><a href="#sourcebuffer-events" class="tocxref"><span class="secno">3.4 </span>Event Summary</a></li><li class="tocline"><a href="#sourcebuffer-algorithms" class="tocxref"><span class="secno">3.5 </span>Algorithms</a><ul class="toc"><li class="tocline"><a href="#sourcebuffer-segment-parser-loop" class="tocxref"><span class="secno">3.5.1 </span>Segment Parser Loop</a></li><li class="tocline"><a href="#sourcebuffer-reset-parser-state" class="tocxref"><span class="secno">3.5.2 </span>Reset Parser State</a></li><li class="tocline"><a href="#sourcebuffer-append-error" class="tocxref"><span class="secno">3.5.3 </span>Append Error Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-buffer-append" class="tocxref"><span class="secno">3.5.4 </span>Buffer Append Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-stream-append-loop" class="tocxref"><span class="secno">3.5.5 </span>Stream Append Loop</a></li><li class="tocline"><a href="#sourcebuffer-init-segment-received" class="tocxref"><span class="secno">3.5.6 </span>Initialization Segment Received</a></li><li class="tocline"><a href="#sourcebuffer-coded-frame-processing" class="tocxref"><span class="secno">3.5.7 </span>Coded Frame Processing</a></li><li class="tocline"><a href="#sourcebuffer-coded-frame-removal" class="tocxref"><span class="secno">3.5.8 </span>Coded Frame Removal Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-coded-frame-eviction" class="tocxref"><span class="secno">3.5.9 </span>Coded Frame Eviction Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-audio-splice-frame-algorithm" class="tocxref"><span class="secno">3.5.10 </span>Audio Splice Frame Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-audio-splice-rendering-algorithm" class="tocxref"><span class="secno">3.5.11 </span>Audio Splice Rendering Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-text-splice-frame-algorithm" class="tocxref"><span class="secno">3.5.12 </span>Text Splice Frame Algorithm</a></li></ul></li></ul></li><li class="tocline"><a href="#sourcebufferlist" class="tocxref"><span class="secno">4. </span>SourceBufferList Object</a><ul class="toc"><li class="tocline"><a href="#attributes-2" class="tocxref"><span class="secno">4.1 </span>Attributes</a></li><li class="tocline"><a href="#methods-2" class="tocxref"><span class="secno">4.2 </span>Methods</a></li><li class="tocline"><a href="#sourcebufferlist-events" class="tocxref"><span class="secno">4.3 </span>Event Summary</a></li></ul></li><li class="tocline"><a href="#videoplaybackquality" class="tocxref"><span class="secno">5. </span>VideoPlaybackQuality Object</a><ul class="toc"><li class="tocline"><a href="#attributes-3" class="tocxref"><span class="secno">5.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#url" class="tocxref"><span class="secno">6. </span>URL Object Extensions</a><ul class="toc"><li class="tocline"><a href="#methods-3" class="tocxref"><span class="secno">6.1 </span>Methods</a></li></ul></li><li class="tocline"><a href="#htmlmediaelement-extensions" class="tocxref"><span class="secno">7. </span>HTMLMediaElement Extensions</a></li><li class="tocline"><a href="#htmlvideoelement-extensions" class="tocxref"><span class="secno">8. </span>HTMLVideoElement Extensions</a><ul class="toc"><li class="tocline"><a href="#methods-4" class="tocxref"><span class="secno">8.1 </span>Methods</a></li></ul></li><li class="tocline"><a href="#audio-track-extensions" class="tocxref"><span class="secno">9. </span>AudioTrack Extensions</a><ul class="toc"><li class="tocline"><a href="#attributes-4" class="tocxref"><span class="secno">9.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#video-track-extensions" class="tocxref"><span class="secno">10. </span>VideoTrack Extensions</a><ul class="toc"><li class="tocline"><a href="#attributes-5" class="tocxref"><span class="secno">10.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#text-track-extensions" class="tocxref"><span class="secno">11. </span>TextTrack Extensions</a><ul class="toc"><li class="tocline"><a href="#attributes-6" class="tocxref"><span class="secno">11.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#byte-stream-formats" class="tocxref"><span class="secno">12. </span>Byte Stream Formats</a><ul class="toc"><li class="tocline"><a href="#webm" class="tocxref"><span class="secno">12.1 </span>WebM Byte Streams</a><ul class="toc"><li class="tocline"><a href="#webm-init-segments" class="tocxref"><span class="secno">12.1.1 </span>Initialization Segments</a></li><li class="tocline"><a href="#webm-media-segments" class="tocxref"><span class="secno">12.1.2 </span>Media Segments</a></li><li class="tocline"><a href="#webm-random-access-points" class="tocxref"><span class="secno">12.1.3 </span>Random Access Points</a></li></ul></li><li class="tocline"><a href="#iso" class="tocxref"><span class="secno">12.2 </span>ISO Base Media File Format Byte Streams</a><ul class="toc"><li class="tocline"><a href="#iso-init-segments" class="tocxref"><span class="secno">12.2.1 </span>Initialization Segments</a></li><li class="tocline"><a href="#iso-media-segments" class="tocxref"><span class="secno">12.2.2 </span>Media Segments</a></li><li class="tocline"><a href="#iso-random-access-points" class="tocxref"><span class="secno">12.2.3 </span>Random Access Points</a></li></ul></li><li class="tocline"><a href="#mpeg2ts" class="tocxref"><span class="secno">12.3 </span>MPEG-2 Transport Stream Byte Streams</a><ul class="toc"><li class="tocline"><a href="#mpeg2ts-general" class="tocxref"><span class="secno">12.3.1 </span>General</a></li><li class="tocline"><a href="#mpeg2ts-init-segments" class="tocxref"><span class="secno">12.3.2 </span>Initialization Segments</a></li><li class="tocline"><a href="#mpeg2ts-media-segments" class="tocxref"><span class="secno">12.3.3 </span>Media Segments</a></li><li class="tocline"><a href="#mpeg2ts-random-access-points" class="tocxref"><span class="secno">12.3.4 </span>Random Access Points</a></li><li class="tocline"><a href="#mpeg2ts-discontinuities" class="tocxref"><span class="secno">12.3.5 </span>Timestamp Rollover &amp; Discontinuities</a></li></ul></li></ul></li><li class="tocline"><a href="#examples" class="tocxref"><span class="secno">13. </span>Examples</a></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">14. </span>Acknowledgments</a></li><li class="tocline"><a href="#revision-history" class="tocxref"><span class="secno">15. </span>Revision History</a></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">A. </span>References</a><ul class="toc"><li class="tocline"><a href="#informative-references" class="tocxref"><span class="secno">A.1 </span>Informative references</a></li></ul></li></ul></section>
+</section><section id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a><ul class="toc"><li class="tocline"><a href="#goals" class="tocxref"><span class="secno">1.1 </span>Goals</a></li><li class="tocline"><a href="#definitions" class="tocxref"><span class="secno">1.2 </span>Definitions</a></li></ul></li><li class="tocline"><a href="#mediasource" class="tocxref"><span class="secno">2. </span>MediaSource Object</a><ul class="toc"><li class="tocline"><a href="#attributes" class="tocxref"><span class="secno">2.1 </span>Attributes</a></li><li class="tocline"><a href="#methods" class="tocxref"><span class="secno">2.2 </span>Methods</a></li><li class="tocline"><a href="#mediasource-events" class="tocxref"><span class="secno">2.3 </span>Event Summary</a></li><li class="tocline"><a href="#mediasource-algorithms" class="tocxref"><span class="secno">2.4 </span>Algorithms</a><ul class="toc"><li class="tocline"><a href="#mediasource-attach" class="tocxref"><span class="secno">2.4.1 </span>Attaching to a media element</a></li><li class="tocline"><a href="#mediasource-detach" class="tocxref"><span class="secno">2.4.2 </span>Detaching from a media element</a></li><li class="tocline"><a href="#mediasource-seeking" class="tocxref"><span class="secno">2.4.3 </span>Seeking</a></li><li class="tocline"><a href="#buffer-monitoring" class="tocxref"><span class="secno">2.4.4 </span>SourceBuffer Monitoring</a></li><li class="tocline"><a href="#active-source-buffer-changes" class="tocxref"><span class="secno">2.4.5 </span>Changes to selected/enabled track state</a></li><li class="tocline"><a href="#duration-change-algorithm" class="tocxref"><span class="secno">2.4.6 </span>Duration change</a></li><li class="tocline"><a href="#end-of-stream-algorithm" class="tocxref"><span class="secno">2.4.7 </span>End of stream algorithm</a></li></ul></li></ul></li><li class="tocline"><a href="#sourcebuffer" class="tocxref"><span class="secno">3. </span>SourceBuffer Object</a><ul class="toc"><li class="tocline"><a href="#attributes-1" class="tocxref"><span class="secno">3.1 </span>Attributes</a></li><li class="tocline"><a href="#methods-1" class="tocxref"><span class="secno">3.2 </span>Methods</a></li><li class="tocline"><a href="#track-buffers" class="tocxref"><span class="secno">3.3 </span>Track Buffers</a></li><li class="tocline"><a href="#sourcebuffer-events" class="tocxref"><span class="secno">3.4 </span>Event Summary</a></li><li class="tocline"><a href="#sourcebuffer-algorithms" class="tocxref"><span class="secno">3.5 </span>Algorithms</a><ul class="toc"><li class="tocline"><a href="#sourcebuffer-segment-parser-loop" class="tocxref"><span class="secno">3.5.1 </span>Segment Parser Loop</a></li><li class="tocline"><a href="#sourcebuffer-reset-parser-state" class="tocxref"><span class="secno">3.5.2 </span>Reset Parser State</a></li><li class="tocline"><a href="#sourcebuffer-append-error" class="tocxref"><span class="secno">3.5.3 </span>Append Error Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-prepare-append" class="tocxref"><span class="secno">3.5.4 </span>Prepare Append Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-buffer-append" class="tocxref"><span class="secno">3.5.5 </span>Buffer Append Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-stream-append-loop" class="tocxref"><span class="secno">3.5.6 </span>Stream Append Loop</a></li><li class="tocline"><a href="#sourcebuffer-init-segment-received" class="tocxref"><span class="secno">3.5.7 </span>Initialization Segment Received</a></li><li class="tocline"><a href="#sourcebuffer-coded-frame-processing" class="tocxref"><span class="secno">3.5.8 </span>Coded Frame Processing</a></li><li class="tocline"><a href="#sourcebuffer-coded-frame-removal" class="tocxref"><span class="secno">3.5.9 </span>Coded Frame Removal Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-coded-frame-eviction" class="tocxref"><span class="secno">3.5.10 </span>Coded Frame Eviction Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-audio-splice-frame-algorithm" class="tocxref"><span class="secno">3.5.11 </span>Audio Splice Frame Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-audio-splice-rendering-algorithm" class="tocxref"><span class="secno">3.5.12 </span>Audio Splice Rendering Algorithm</a></li><li class="tocline"><a href="#sourcebuffer-text-splice-frame-algorithm" class="tocxref"><span class="secno">3.5.13 </span>Text Splice Frame Algorithm</a></li></ul></li></ul></li><li class="tocline"><a href="#sourcebufferlist" class="tocxref"><span class="secno">4. </span>SourceBufferList Object</a><ul class="toc"><li class="tocline"><a href="#attributes-2" class="tocxref"><span class="secno">4.1 </span>Attributes</a></li><li class="tocline"><a href="#methods-2" class="tocxref"><span class="secno">4.2 </span>Methods</a></li><li class="tocline"><a href="#sourcebufferlist-events" class="tocxref"><span class="secno">4.3 </span>Event Summary</a></li></ul></li><li class="tocline"><a href="#videoplaybackquality" class="tocxref"><span class="secno">5. </span>VideoPlaybackQuality Object</a><ul class="toc"><li class="tocline"><a href="#attributes-3" class="tocxref"><span class="secno">5.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#url" class="tocxref"><span class="secno">6. </span>URL Object Extensions</a><ul class="toc"><li class="tocline"><a href="#methods-3" class="tocxref"><span class="secno">6.1 </span>Methods</a></li></ul></li><li class="tocline"><a href="#htmlmediaelement-extensions" class="tocxref"><span class="secno">7. </span>HTMLMediaElement Extensions</a></li><li class="tocline"><a href="#htmlvideoelement-extensions" class="tocxref"><span class="secno">8. </span>HTMLVideoElement Extensions</a><ul class="toc"><li class="tocline"><a href="#methods-4" class="tocxref"><span class="secno">8.1 </span>Methods</a></li></ul></li><li class="tocline"><a href="#audio-track-extensions" class="tocxref"><span class="secno">9. </span>AudioTrack Extensions</a><ul class="toc"><li class="tocline"><a href="#attributes-4" class="tocxref"><span class="secno">9.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#video-track-extensions" class="tocxref"><span class="secno">10. </span>VideoTrack Extensions</a><ul class="toc"><li class="tocline"><a href="#attributes-5" class="tocxref"><span class="secno">10.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#text-track-extensions" class="tocxref"><span class="secno">11. </span>TextTrack Extensions</a><ul class="toc"><li class="tocline"><a href="#attributes-6" class="tocxref"><span class="secno">11.1 </span>Attributes</a></li></ul></li><li class="tocline"><a href="#byte-stream-formats" class="tocxref"><span class="secno">12. </span>Byte Stream Formats</a><ul class="toc"><li class="tocline"><a href="#webm" class="tocxref"><span class="secno">12.1 </span>WebM Byte Streams</a><ul class="toc"><li class="tocline"><a href="#webm-init-segments" class="tocxref"><span class="secno">12.1.1 </span>Initialization Segments</a></li><li class="tocline"><a href="#webm-media-segments" class="tocxref"><span class="secno">12.1.2 </span>Media Segments</a></li><li class="tocline"><a href="#webm-random-access-points" class="tocxref"><span class="secno">12.1.3 </span>Random Access Points</a></li></ul></li><li class="tocline"><a href="#iso" class="tocxref"><span class="secno">12.2 </span>ISO Base Media File Format Byte Streams</a><ul class="toc"><li class="tocline"><a href="#iso-init-segments" class="tocxref"><span class="secno">12.2.1 </span>Initialization Segments</a></li><li class="tocline"><a href="#iso-media-segments" class="tocxref"><span class="secno">12.2.2 </span>Media Segments</a></li><li class="tocline"><a href="#iso-random-access-points" class="tocxref"><span class="secno">12.2.3 </span>Random Access Points</a></li></ul></li><li class="tocline"><a href="#mpeg2ts" class="tocxref"><span class="secno">12.3 </span>MPEG-2 Transport Stream Byte Streams</a><ul class="toc"><li class="tocline"><a href="#mpeg2ts-general" class="tocxref"><span class="secno">12.3.1 </span>General</a></li><li class="tocline"><a href="#mpeg2ts-init-segments" class="tocxref"><span class="secno">12.3.2 </span>Initialization Segments</a></li><li class="tocline"><a href="#mpeg2ts-media-segments" class="tocxref"><span class="secno">12.3.3 </span>Media Segments</a></li><li class="tocline"><a href="#mpeg2ts-random-access-points" class="tocxref"><span class="secno">12.3.4 </span>Random Access Points</a></li><li class="tocline"><a href="#mpeg2ts-discontinuities" class="tocxref"><span class="secno">12.3.5 </span>Timestamp Rollover &amp; Discontinuities</a></li></ul></li></ul></li><li class="tocline"><a href="#examples" class="tocxref"><span class="secno">13. </span>Examples</a></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">14. </span>Acknowledgments</a></li><li class="tocline"><a href="#revision-history" class="tocxref"><span class="secno">15. </span>Revision History</a></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">A. </span>References</a><ul class="toc"><li class="tocline"><a href="#informative-references" class="tocxref"><span class="secno">A.1 </span>Informative references</a></li></ul></li></ul></section>
 
 
     <section id="introduction">
@@ -1290,23 +1290,7 @@
           
         <table class="parameters"><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><td class="prmName">data</td><td class="prmType"><code><code><a href="http://www.khronos.org/registry/typedarray/specs/latest/#ArrayBufferView" class="idlType">ArrayBufferView</a></code></code></td><td class="prmNullFalse">✘</td><td class="prmOptFalse">✘</td><td class="prmDesc"></td></tr></table><div><em>Return type: </em><code><code><a href="http://dev.w3.org/2006/webapi/WebIDL/#idl-void" class="idlType">void</a></code></code></div><p>When this method is invoked, the user agent must run the following steps:</p><ol class="method-algorithm">
             <li>If <var>data</var> is null then throw an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_access_err">INVALID_ACCESS_ERR</a></code> exception and abort these steps.</li>
-            <li>If this object has been removed from the <code><a href="#widl-MediaSource-sourceBuffers">sourceBuffers</a></code> attribute of the <a href="#parent-media-source">parent media source</a> then throw an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_state_err">INVALID_STATE_ERR</a></code> exception and abort these steps.</li>
-            <li>If the <code><a href="#widl-SourceBuffer-updating">updating</a></code> attribute equals true, then throw an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_state_err">INVALID_STATE_ERR</a></code> exception and abort these steps.</li>
-            <li>
-              <p>If the <code><a href="#widl-MediaSource-readyState">readyState</a></code> attribute of the <a href="#parent-media-source">parent media source</a> is in the <code><a href="#idl-def-ReadyState.ended">"ended"</a></code> state then run the following steps:</p>
-              <ol>
-	        <li>Set the <code><a href="#widl-MediaSource-readyState">readyState</a></code> attribute of the <a href="#parent-media-source">parent media source</a> to <code><a href="#idl-def-ReadyState.open">"open"</a></code>
-                </li>
-	        <li>
-                  <a href="http://www.w3.org/TR/html5/webappapis.html#queue-a-task">Queue a task</a> to <a href="http://www.w3.org/TR/html5/webappapis.html#fire-a-simple-event">fire a simple event</a> named <code><a href="#dom-evt-sourceopen">sourceopen</a></code> at the <a href="#parent-media-source">parent media source</a> .</li>
-              </ol>
-            </li>
-            <li>Run the <a href="#sourcebuffer-coded-frame-eviction">coded frame eviction algorithm</a>.</li>
-            <li>
-              <p>If the <var><a href="#sourcebuffer-buffer-full-flag">buffer full flag</a></var> equals true, then throw a <code><a href="http://dom.spec.whatwg.org/#dom-domexception-quota_exceeded_err">QUOTA_EXCEEDED_ERR</a></code> exception and abort these step.</p>
-              <div class="note"><div class="note-title"><span>Note</span></div><p class="">This is the signal that the implementation was unable to evict enough data to accomodate the append or the append is too big. The web
-                application must use <code><a href="#widl-SourceBuffer-remove-void-double-start-double-end">remove()</a></code> to explicitly free up space and/or reduce the size of the append.</p></div>
-            </li>
+            <li>Run the <a href="#sourcebuffer-prepare-append">prepare append</a> algorithm.</li>
             <li>Add <var>data</var> to the end of the <var><a href="#sourcebuffer-input-buffer">input buffer</a></var>.</li>
             <li>Set the <code><a href="#widl-SourceBuffer-updating">updating</a></code> attribute to true.</li>
             <li><a href="http://www.w3.org/TR/html5/webappapis.html#queue-a-task">Queue a task</a> to <a href="http://www.w3.org/TR/html5/webappapis.html#fire-a-simple-event">fire a simple event</a> named <code><a href="#dom-evt-updatestart">updatestart</a></code> at this <a href="#idl-def-SourceBuffer" class="idlType"><code>SourceBuffer</code></a> object.</li>
@@ -1317,24 +1301,7 @@
           
         <table class="parameters"><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><td class="prmName">stream</td><td class="prmType"><code><code><a href="http://dvcs.w3.org/hg/streams-api/raw-file/tip/Overview.htm#idl-def-Stream" class="idlType">Stream</a></code></code></td><td class="prmNullFalse">✘</td><td class="prmOptFalse">✘</td><td class="prmDesc"></td></tr><tr><td class="prmName">maxSize</td><td class="prmType"><code><code><a href="http://dev.w3.org/2006/webapi/WebIDL/#idl-unsigned-long-long" class="idlType">unsigned long long</a></code></code></td><td class="prmNullFalse">✘</td><td class="prmOptTrue">✔</td><td class="prmDesc"></td></tr></table><div><em>Return type: </em><code><code><a href="http://dev.w3.org/2006/webapi/WebIDL/#idl-void" class="idlType">void</a></code></code></div><p>When this method is invoked, the user agent must run the following steps:</p><ol class="method-algorithm">
             <li>If <var>stream</var> is null then throw an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_access_err">INVALID_ACCESS_ERR</a></code> exception and abort these steps.</li>
-            <li>If this object has been removed from the <code><a href="#widl-MediaSource-sourceBuffers">sourceBuffers</a></code> attribute of the <a href="#parent-media-source">parent media source</a> then throw
-              an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_state_err">INVALID_STATE_ERR</a></code> exception and abort these steps.</li>
-            <li>If the <code><a href="#widl-SourceBuffer-updating">updating</a></code> attribute equals true, then throw an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_state_err">INVALID_STATE_ERR</a></code> exception and abort these
-              steps.</li>
-            <li>
-              <p>If the <code><a href="#widl-MediaSource-readyState">readyState</a></code> attribute of the <a href="#parent-media-source">parent media source</a> is in the <code><a href="#idl-def-ReadyState.ended">"ended"</a></code> state then run
-                the following steps:</p>
-              <ol>
-	        <li>Set the <code><a href="#widl-MediaSource-readyState">readyState</a></code> attribute of the <a href="#parent-media-source">parent media source</a> to <code><a href="#idl-def-ReadyState.open">"open"</a></code></li>
-	        <li><a href="http://www.w3.org/TR/html5/webappapis.html#queue-a-task">Queue a task</a> to <a href="http://www.w3.org/TR/html5/webappapis.html#fire-a-simple-event">fire a simple event</a> named <code><a href="#dom-evt-sourceopen">sourceopen</a></code> at the <a href="#parent-media-source">parent media source</a> .</li>
-              </ol>
-            </li>
-            <li>Run the <a href="#sourcebuffer-coded-frame-eviction">coded frame eviction algorithm</a>.</li>
-            <li>
-              <p>If the <var><a href="#sourcebuffer-buffer-full-flag">buffer full flag</a></var> equals true, then throw a <code><a href="http://dom.spec.whatwg.org/#dom-domexception-quota_exceeded_err">QUOTA_EXCEEDED_ERR</a></code> exception and abort these step.</p>
-              <div class="note"><div class="note-title"><span>Note</span></div><p class="">This is the signal that the implementation was unable to evict enough data to accomodate the append or the append is too big. The web
-                application must use <code><a href="#widl-SourceBuffer-remove-void-double-start-double-end">remove()</a></code> to explicitly free up space and/or reduce the size of the append.</p></div>
-            </li>
+            <li>Run the <a href="#sourcebuffer-prepare-append">prepare append</a> algorithm.</li>
             <li>Set the <code><a href="#widl-SourceBuffer-updating">updating</a></code> attribute to true.</li>
             <li><a href="http://www.w3.org/TR/html5/webappapis.html#queue-a-task">Queue a task</a> to <a href="http://www.w3.org/TR/html5/webappapis.html#fire-a-simple-event">fire a simple event</a> named <code><a href="#dom-evt-updatestart">updatestart</a></code> at this <a href="#idl-def-SourceBuffer" class="idlType"><code>SourceBuffer</code></a> object.</li>
             <li>Asynchronously run the <a href="#sourcebuffer-stream-append-loop">stream append loop</a> algorithm with <var>stream</var> and <var>maxSize</var>.</li>
@@ -1555,8 +1522,32 @@
           </ol>
         </section>
 
+        <section id="sourcebuffer-prepare-append">
+            <h4><span class="secno">3.5.4 </span>Prepare Append Algorithm</h4>
+            <p>When an append operation begins, the follow steps are run to validate and prepare the <a href="#idl-def-SourceBuffer" class="idlType"><code>SourceBuffer</code></a>.</p>
+            <ol>
+            <li>If the <a href="#idl-def-SourceBuffer" class="idlType"><code>SourceBuffer</code></a> has been removed from the <code><a href="#widl-MediaSource-sourceBuffers">sourceBuffers</a></code> attribute of the <a href="#parent-media-source">parent media source</a> then throw an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_state_err">INVALID_STATE_ERR</a></code> exception and abort these steps.</li>
+            <li>If the <code><a href="#widl-SourceBuffer-updating">updating</a></code> attribute equals true, then throw an <code><a href="http://dom.spec.whatwg.org/#dom-domexception-invalid_state_err">INVALID_STATE_ERR</a></code> exception and abort these steps.</li>
+            <li>
+              <p>If the <code><a href="#widl-MediaSource-readyState">readyState</a></code> attribute of the <a href="#parent-media-source">parent media source</a> is in the <code><a href="#idl-def-ReadyState.ended">"ended"</a></code> state then run the following steps:</p>
+              <ol>
+	        <li>Set the <code><a href="#widl-MediaSource-readyState">readyState</a></code> attribute of the <a href="#parent-media-source">parent media source</a> to <code><a href="#idl-def-ReadyState.open">"open"</a></code>
+                </li>
+	        <li>
+                  <a href="http://www.w3.org/TR/html5/webappapis.html#queue-a-task">Queue a task</a> to <a href="http://www.w3.org/TR/html5/webappapis.html#fire-a-simple-event">fire a simple event</a> named <code><a href="#dom-evt-sourceopen">sourceopen</a></code> at the <a href="#parent-media-source">parent media source</a> .</li>
+              </ol>
+            </li>
+            <li>Run the <a href="#sourcebuffer-coded-frame-eviction">coded frame eviction algorithm</a>.</li>
+            <li>
+              <p>If the <var><a href="#sourcebuffer-buffer-full-flag">buffer full flag</a></var> equals true, then throw a <code><a href="http://dom.spec.whatwg.org/#dom-domexception-quota_exceeded_err">QUOTA_EXCEEDED_ERR</a></code> exception and abort these step.</p>
+              <div class="note"><div class="note-title"><span>Note</span></div><p class="">This is the signal that the implementation was unable to evict enough data to accomodate the append or the append is too big. The web
+                application must use <code><a href="#widl-SourceBuffer-remove-void-double-start-double-end">remove()</a></code> to explicitly free up space and/or reduce the size of the append.</p></div>
+            </li>
+            </ol>
+        </section>
+
         <section id="sourcebuffer-buffer-append">
-          <h4><span class="secno">3.5.4 </span>Buffer Append Algorithm</h4>
+          <h4><span class="secno">3.5.5 </span>Buffer Append Algorithm</h4>
           <p>When <code><a href="#widl-SourceBuffer-appendBuffer-void-ArrayBufferView-data">appendBuffer()</a></code> is called, the following steps are run to process the appended data.</p>
           <ol>
             <li>Run the <a href="#sourcebuffer-segment-parser-loop">segment parser loop</a> algorithm.</li>
@@ -1568,7 +1559,7 @@
         </section>
 
         <section id="sourcebuffer-stream-append-loop">
-          <h4><span class="secno">3.5.5 </span>Stream Append Loop</h4>
+          <h4><span class="secno">3.5.6 </span>Stream Append Loop</h4>
           <p>When a <code><a href="http://dvcs.w3.org/hg/streams-api/raw-file/tip/Overview.htm#idl-def-Stream" class="idlType">Stream</a></code>[<cite><a class="bibref" href="#bib-STREAMS-API">STREAMS-API</a></cite>] is passed to <code><a href="#widl-SourceBuffer-appendStream-void-Stream-stream-unsigned-long-long-maxSize">appendStream()</a></code>, the following steps are run to transfer data from the
             <code><a href="http://dvcs.w3.org/hg/streams-api/raw-file/tip/Overview.htm#idl-def-Stream" class="idlType">Stream</a></code> to the <a href="#idl-def-SourceBuffer" class="idlType"><code>SourceBuffer</code></a>. This algorithm is initialized with the  <var>stream</var> and <var>maxSize</var> parameters
             from the <code><a href="#widl-SourceBuffer-appendStream-void-Stream-stream-unsigned-long-long-maxSize">appendStream()</a></code> call.
@@ -1606,7 +1597,7 @@
         </section>
 
         <section id="sourcebuffer-init-segment-received">
-          <h4><span class="secno">3.5.6 </span>Initialization Segment Received</h4>
+          <h4><span class="secno">3.5.7 </span>Initialization Segment Received</h4>
           <p>The following steps are run when the <a href="#sourcebuffer-segment-parser-loop">segment parser loop</a> successfully parses a complete <a href="#init-segment">initialization segment</a>:</p>
           <p>Each SourceBuffer object has an internal <dfn id="first-init-segment-flag">first initialization segment flag</dfn> that tracks whether the first <a href="#init-segment">initialization segment</a> has been appended. This flag is set to false when the SourceBuffer is created and updated by the algorithm below.</p>
           <ol>
@@ -1743,7 +1734,7 @@
         </section>
 
         <section id="sourcebuffer-coded-frame-processing">
-          <h4><span class="secno">3.5.7 </span>Coded Frame Processing</h4>
+          <h4><span class="secno">3.5.8 </span>Coded Frame Processing</h4>
           <p>When complete <a href="#coded-frame">coded frames</a> have been parsed by the <a href="#sourcebuffer-segment-parser-loop">segment parser loop</a> then the following steps are run:</p>
           <ol>
             <li>
@@ -1940,7 +1931,7 @@
         </section>
 
         <section id="sourcebuffer-coded-frame-removal">
-          <h4><span class="secno">3.5.8 </span>Coded Frame Removal Algorithm</h4>
+          <h4><span class="secno">3.5.9 </span>Coded Frame Removal Algorithm</h4>
           <p>Follow these steps when <a href="#coded-frame">coded frames</a> for a specific time range need to be removed from the SourceBuffer:</p>
           <ol>
             <li>Let <var>start</var> be the starting presentation timestamp for the removal range.</li>
@@ -1971,7 +1962,7 @@
         </section>
 
         <section id="sourcebuffer-coded-frame-eviction">
-          <h4><span class="secno">3.5.9 </span>Coded Frame Eviction Algorithm</h4>
+          <h4><span class="secno">3.5.10 </span>Coded Frame Eviction Algorithm</h4>
           <p>This algorithm is run to free up space in this source buffer when new data is appended.</p>
           <ol>
             <li>Let <var>new data</var> equal the data that is about to be appended to this SourceBuffer.</li>
@@ -1988,7 +1979,7 @@
         </section>
 
         <section id="sourcebuffer-audio-splice-frame-algorithm">
-          <h4><span class="secno">3.5.10 </span>Audio Splice Frame Algorithm</h4>
+          <h4><span class="secno">3.5.11 </span>Audio Splice Frame Algorithm</h4>
           <p>Follow these steps when the <a href="#sourcebuffer-coded-frame-processing">coded frame processing algorithm</a> needs to generate a splice frame for two overlapping audio
             <a href="#coded-frame">coded frames</a>:</p>
           <ol>
@@ -2059,7 +2050,7 @@
           </ol>
         </section>
         <section id="sourcebuffer-audio-splice-rendering-algorithm">
-          <h4><span class="secno">3.5.11 </span>Audio Splice Rendering Algorithm</h4>
+          <h4><span class="secno">3.5.12 </span>Audio Splice Rendering Algorithm</h4>
           <p>The following steps are run when a spliced frame, generated by the <a href="#sourcebuffer-audio-splice-frame-algorithm">audio splice frame algorithm</a>, needs to be rendered by the
             media element:</p>
           <ol>
@@ -2092,7 +2083,7 @@
           </div></div>
         </section>
         <section id="sourcebuffer-text-splice-frame-algorithm">
-          <h4><span class="secno">3.5.12 </span>Text Splice Frame Algorithm</h4>
+          <h4><span class="secno">3.5.13 </span>Text Splice Frame Algorithm</h4>
           <p>Follow these steps when the <a href="#sourcebuffer-coded-frame-processing">coded frame processing algorithm</a> needs to generate a splice frame for two overlapping timed text
             <a href="#coded-frame">coded frames</a>:</p>
           <ol>
@@ -3084,9 +3075,9 @@
     </section>
   
 
-<form action="//www.w3.org/Bugs/Public/enter_bug.cgi" target="_blank" style="position: fixed; width: 10em; top: 1em; right: 1em; font-family: Tahoma, sans-serif; font-size: 11px; opacity: 0.8; text-align: right;">See a problem? Select text and <input type="submit" accesskey="f" value="file a bug" style="font-family: Tahoma, sans-serif; font-size: 10px;"><input type="hidden" name="comment" value=""><input type="hidden" name="short_desc" value="[MSE] "><input type="hidden" name="product" value="HTML WG"><input type="hidden" name="component" value="Media Source Extensions">.</form><section id="references" class="appendix"><!--OddPage--><h2><span class="secno">A. </span>References</h2><section id="informative-references"><h3><span class="secno">A.1 </span>Informative references</h3><dl class="bibliography"><dt id="bib-BCP47">[BCP47]</dt><dd>A. Phillips; M. Davis. <a href="http://tools.ietf.org/html/bcp47"><cite>Tags for Identifying Languages</cite></a>. September 2009. IETF Best Current Practice. URL: <a href="http://tools.ietf.org/html/bcp47">http://tools.ietf.org/html/bcp47</a>
+<section id="references" class="appendix"><!--OddPage--><h2><span class="secno">A. </span>References</h2><section id="informative-references"><h3><span class="secno">A.1 </span>Informative references</h3><dl class="bibliography"><dt id="bib-BCP47">[BCP47]</dt><dd>A. Phillips; M. Davis. <a href="http://tools.ietf.org/html/bcp47"><cite>Tags for Identifying Languages</cite></a>. September 2009. IETF Best Current Practice. URL: <a href="http://tools.ietf.org/html/bcp47">http://tools.ietf.org/html/bcp47</a>
 </dd><dt id="bib-FILE-API">[FILE-API]</dt><dd>Arun Ranganathan; Jonas Sicking. <a href="http://www.w3.org/TR/2012/WD-FileAPI-20121025"><cite>File API</cite></a>. 25 October 2012. W3C Working Draft. URL: <a href="http://www.w3.org/TR/2012/WD-FileAPI-20121025">http://www.w3.org/TR/2012/WD-FileAPI-20121025</a>
 </dd><dt id="bib-HTML5">[HTML5]</dt><dd>Robin Berjon et al. <a href="http://www.w3.org/TR/html5/"><cite>HTML5</cite></a>. 17 December 2012. W3C Candidate Recommendation. URL: <a href="http://www.w3.org/TR/html5/">http://www.w3.org/TR/html5/</a>
 </dd><dt id="bib-STREAMS-API">[STREAMS-API]</dt><dd>Feras Moussa. <a href="http://dvcs.w3.org/hg/streams-api/raw-file/tip/Overview.htm"><cite>Streams API</cite></a>. 25 October 2012. W3C Editor's Draft. URL: <a href="http://dvcs.w3.org/hg/streams-api/raw-file/tip/Overview.htm">http://dvcs.w3.org/hg/streams-api/raw-file/tip/Overview.htm</a>
 </dd><dt id="bib-TYPED-ARRAYS">[TYPED-ARRAYS]</dt><dd>David Herman, Kenneth Russell. <a href="https://www.khronos.org/registry/typedarray/specs/latest/"><cite>Typed Arrays</cite></a> Khronos Working Draft. (Work in progress.) URL: <a href="https://www.khronos.org/registry/typedarray/specs/latest/">https://www.khronos.org/registry/typedarray/specs/latest/</a> 
-</dd></dl></section></section></body></html>
+</dd></dl></section></section><form action="//www.w3.org/Bugs/Public/enter_bug.cgi" target="_blank" style="position: fixed; width: 10em; top: 1em; right: 1em; font-family: Tahoma, sans-serif; font-size: 11px; opacity: 0.8; text-align: right;">See a problem? Select text and <input type="submit" accesskey="f" value="file a bug" style="font-family: Tahoma, sans-serif; font-size: 10px;"><input type="hidden" name="comment" value=""><input type="hidden" name="short_desc" value="[MSE] "><input type="hidden" name="product" value="HTML WG"><input type="hidden" name="component" value="Media Source Extensions">.</form></body></html>
\ No newline at end of file
--- a/media-source/media-source.js	Tue Jul 02 09:52:35 2013 -0700
+++ b/media-source/media-source.js	Tue Jul 09 08:00:36 2013 -0700
@@ -212,6 +212,7 @@
     'append-error-algorithm': { func: link_helper, fragment: '#sourcebuffer-append-error', link_text: 'append error algorithm', },
     'reset-parser-state-algorithm': { func: link_helper, fragment: '#sourcebuffer-reset-parser-state', link_text: 'reset parser state algorithm', },
     'stream-append-loop': { func: link_helper, fragment: '#sourcebuffer-stream-append-loop', link_text: 'stream append loop', },
+    'prepare-append': { func: link_helper, fragment: '#sourcebuffer-prepare-append', link_text: 'prepare append', },
     'buffer-append': { func: link_helper, fragment: '#sourcebuffer-buffer-append', link_text: 'buffer append ', },
     'init-segment-received-algorithm': { func: link_helper, fragment: '#sourcebuffer-init-segment-received', link_text: 'initialization segment received algorithm', },
     'coded-frame-processing-algorithm': { func: link_helper, fragment: '#sourcebuffer-coded-frame-processing', link_text: 'coded frame processing algorithm', },
html-media

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