--- a/encrypted-media/cenc-format.html Fri Oct 17 10:23:02 2014 -0700
+++ b/encrypted-media/cenc-format.html Fri Oct 17 11:57:49 2014 -0700
@@ -200,13 +200,15 @@
</style><link rel="stylesheet" href="https://www.w3.org/StyleSheets/TR/W3C-ED"><!--[if lt IE 9]><script src='https://www.w3.org/2008/site/js/html5shiv.js'></script><![endif]--></head>
<body class="h-entry" role="document" id="respecDocument"><div class="head" role="contentinfo" id="respecHeader">
<p>
-
- <a href="http://www.w3.org/"><img width="72" height="48" src="https://www.w3.org/Icons/w3c_home" alt="W3C"></a>
-
+
+
+ <a href="http://www.w3.org/"><img width="72" height="48" src="https://www.w3.org/Icons/w3c_home" alt="W3C"></a>
+
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</p>
<h1 class="title p-name" id="title" property="dcterms:title">ISO Common Encryption EME Stream Format and Initialization Data</h1>
- <h2 property="dcterms:issued" datatype="xsd:dateTime" content="2014-08-06T04:03:25.000Z" id="w3c-editor-s-draft-05-august-2014"><abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft <time class="dt-published" datetime="2014-08-05">05 August 2014</time></h2>
+ <h2 property="dcterms:issued" datatype="xsd:dateTime" content="2014-10-17T18:56:30.000Z" id="w3c-editor-s-draft-17-october-2014"><abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft <time class="dt-published" datetime="2014-10-17">17 October 2014</time></h2>
<dl>
<dt>This version:</dt>
@@ -267,11 +269,11 @@
<hr>
</div>
<!-- TODO: Use styles for ISO boxes like the MSE registry. -->
- <section id="abstract" class="introductory" property="dcterms:abstract" datatype="" typeof="bibo:Chapter" resource="#abstract" rel="bibo:Chapter"><h2 aria-level="1" role="heading" id="h2_abstract">Abstract</h2>
+ <section id="abstract" class="introductory" property="dcterms:abstract" datatype="" typeof="bibo:Chapter" resource="#abstract" rel="bibo:Chapter"><h2 role="heading" id="h2_abstract">Abstract</h2>
<p>This specification defines the stream format and initialization data for using ISO Base media File Format [<cite><a class="bibref" href="#bib-BMFF">BMFF</a></cite>] content using the ISO Common Encryption ('cenc') protection scheme [<cite><a class="bibref" href="#bib-CENC-1ST">CENC-1ST</a></cite>] with the <a href="http://www.w3.org/TR/encrypted-media/">Encrypted Media Extensions</a>.
It also defines a common SystemID and PSSH box format for use with Encrypted Media Extensions.
</p>
- </section><section id="sotd" class="introductory" typeof="bibo:Chapter" resource="#sotd" rel="bibo:Chapter"><h2 aria-level="1" role="heading" id="h2_sotd">Status of This Document</h2>
+ </section><section id="sotd" class="introductory" typeof="bibo:Chapter" resource="#sotd" rel="bibo:Chapter"><h2 role="heading" id="h2_sotd">Status of This Document</h2>
@@ -334,21 +336,25 @@
</p>
+ <p>This document is governed by the <a id="w3c_process_revision" href="http://www.w3.org/2014/Process-20140801/">1 August 2014 <abbr title="World Wide Web Consortium">W3C</abbr> Process Document</a>.
+ </p>
+
+
-</section><section id="toc"><h2 class="introductory" aria-level="1" role="heading" id="h2_toc">Table of Contents</h2><ul class="toc" role="directory" id="respecContents"><li class="tocline"><a href="#stream-format" class="tocxref"><span class="secno">1. </span>Stream Format</a></li><li class="tocline"><a href="#detect-encrypt" class="tocxref"><span class="secno">2. </span>Detecting Encryption</a></li><li class="tocline"><a href="#init-data" class="tocxref"><span class="secno">3. </span>Initialization Data and Events</a></li><li class="tocline"><a href="#common-system" class="tocxref"><span class="secno">4. </span>Common SystemID and PSSH Box Format</a><ul class="toc"><li class="tocline"><a href="#common-system-definition" class="tocxref"><span class="secno">4.1 </span>Definition</a></li><li class="tocline"><a href="#example" class="tocxref"><span class="secno">4.2 </span>Example</a></li></ul></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">A. </span>References</a><ul class="toc"><li class="tocline"><a href="#normative-references" class="tocxref"><span class="secno">A.1 </span>Normative references</a></li></ul></li></ul></section>
+</section><section id="toc"><h2 class="introductory" role="heading" id="h2_toc">Table of Contents</h2><ul class="toc" role="directory" id="respecContents"><li class="tocline"><a href="#stream-format" class="tocxref"><span class="secno">1. </span>Stream Format</a></li><li class="tocline"><a href="#detect-encrypt" class="tocxref"><span class="secno">2. </span>Detecting Encryption</a></li><li class="tocline"><a href="#init-data" class="tocxref"><span class="secno">3. </span>Initialization Data and Events</a></li><li class="tocline"><a href="#common-system" class="tocxref"><span class="secno">4. </span>Common SystemID and PSSH Box Format</a><ul class="toc"><li class="tocline"><a href="#common-system-definition" class="tocxref"><span class="secno">4.1 </span>Definition</a></li><li class="tocline"><a href="#example" class="tocxref"><span class="secno">4.2 </span>Example</a></li></ul></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">A. </span>References</a><ul class="toc"><li class="tocline"><a href="#normative-references" class="tocxref"><span class="secno">A.1 </span>Normative references</a></li></ul></li></ul></section>
<section id="stream-format" typeof="bibo:Chapter" resource="#stream-format" rel="bibo:Chapter">
- <!--OddPage--><h2 aria-level="1" role="heading" id="h2_stream-format"><span class="secno">1. </span>Stream Format</h2>
+ <!--OddPage--><h2 role="heading" id="h2_stream-format"><span class="secno">1. </span>Stream Format</h2>
<p>Under the ISO Common Encryption ('cenc') protection scheme [<cite><a class="bibref" href="#bib-CENC-1ST">CENC-1ST</a></cite>], ISO Base media File Format [<cite><a class="bibref" href="#bib-BMFF">BMFF</a></cite>] content is encrypted at the sample level with AES-128 CTR encryption. This protection method enables multiple Key Systems to decrypt the same media content.</p>
<p>Each key is identified by a Key ID and each encrypted sample is associated with the Key ID of the key needed to decrypt it. This association is signaled either through the specification of a default Key ID in the track encryption box ('tenc') or by assigning the sample to a Sample Group, the definition of which specifies a Key ID. Common encryption files may contain a mixture of encrypted and unencrypted samples.</p>
</section>
<section id="detect-encrypt" typeof="bibo:Chapter" resource="#detect-encrypt" rel="bibo:Chapter">
- <!--OddPage--><h2 aria-level="1" role="heading" id="h2_detect-encrypt"><span class="secno">2. </span>Detecting Encryption</h2>
+ <!--OddPage--><h2 role="heading" id="h2_detect-encrypt"><span class="secno">2. </span>Detecting Encryption</h2>
<p>Protection scheme signaling conforms with ISO Base media File Format [<cite><a class="bibref" href="#bib-BMFF">BMFF</a></cite>]. When protection has been applied, the stream type will be transformed to 'encv' for video or 'enca' for audio, with a Protection Scheme Information Box ('sinf') added to the sample entry in the Sample Description Box ('stsd'). The Protection Scheme Information Box ('sinf') will contain a Scheme Type Box ('schm') with a scheme_type field set to a value of 'cenc' (Common Encryption).</p>
<p>The "encrypted block" is a sample. Determining whether a sample is encrypted depends on the corresponding Track Encryption Box ('tenc') and the sample group with grouping type 'seig' (CencSampleEncryption group), if any, associated with the sample.
The default encryption state of a sample is defined by the IsEncrypted flag in the associated track encryption box ('tenc'). This default state may be modified by the IsEncrypted flag in the SampleGroupDescriptionBox ('sgpd'), pointed to by an index in the SampleToGroupBox ('sbgp').</p>
@@ -357,26 +363,36 @@
</section>
<section id="init-data" typeof="bibo:Chapter" resource="#init-data" rel="bibo:Chapter">
- <!--OddPage--><h2 aria-level="1" role="heading" id="h2_init-data"><span class="secno">3. </span>Initialization Data and Events</h2>
+ <!--OddPage--><h2 role="heading" id="h2_init-data"><span class="secno">3. </span>Initialization Data and Events</h2>
<p>Common Encryption files may contain one or more protection system specific header ('pssh') boxes, each for a unique SystemID at each location where a 'pssh' box is necessary.</p>
- <p><a href="encrypted-media.html#initialization-data">Initialization Data</a> is always one or more concatenated 'pssh' boxes. The CDM must be able to examine multiple 'pssh' boxes in the Initialization Data to find a 'pssh' box that it supports.</p>
- <p>Each time one or more 'pssh' boxes are encountered, the <a href="encrypted-media.html#algorithms-initdata-encountered">Initialization Data Encountered</a> algorithm shall be invoked with <var title="">initDataType</var> = "cenc" and <var title="">initData</var> = the 'pssh' box(es). Multiple 'pssh' boxes must be provided together if and only if they appear directly next to each other in the file.</p>
+ <p><a href="encrypted-media.html#initialization-data">Initialization Data</a> is always one or more concatenated 'pssh' boxes.
+ An implementation (the user agent and/or CDM) <em class="rfc2119" title="MUST">MUST</em> be able to examine multiple 'pssh' boxes in the Initialization Data to find a 'pssh' box that it supports.
+ At least one of the concatenated 'pssh' boxes <em class="rfc2119" title="SHOULD">SHOULD</em> contain the SystemID defined in the <a href="#common-system">Common SystemID and PSSH Box Format</a> section.
+ </p>
+ <p>Each time one or more 'pssh' boxes are encountered, the <a href="encrypted-media.html#algorithms-initdata-encountered">Initialization Data Encountered</a> algorithm shall be invoked with <var title="">initDataType</var> = "cenc" and <var title="">initData</var> = the 'pssh' box(es). Multiple 'pssh' boxes <em class="rfc2119" title="MUST">MUST</em> be provided together if and only if they appear directly next to each other in the file.</p>
<p>If a supported 'pssh' box (based on SystemID) is not found while processing the <var>initData</var> in the <code><a href="encrypted-media.html#dom-createsession">createSession()</a></code> algorithm, follow the algorithm step for "<var>init data</var> is not supported by the <var>cdm</var>."</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_1"><span>Note</span></div><p class="">'pssh' boxes stored in movie fragment boxes are intended to store keys referenced by KID in a sample group description contained in that movie fragment, where the KID in the sample group description overrides the default_KID specified for the track in the track encryption box ('tenc'). Each 'moof'/'pssh' box must protect the contained keys with a SystemID specific method. Sample groups and 'pssh' key storage in movie fragments enable keys to be changed and accessed without interruption during playback of a track.</p></div>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_2"><span>Note</span></div><p class="">ISO Common Encryption 2nd Edition [<cite><a class="bibref" href="#bib-CENC-2ND">CENC-2ND</a></cite>] also specifies storage of a 'pssh' box base64 encoded in an XML element of the form <cenc:pssh (base64 'pssh')>. For instance, DASH manifests may provide 'pssh' boxes in this format, each contained in a ContentProtection Descriptor element identified by a SystemID. These 'pssh' boxes may be decoded and concatenated by an application to provide equivalent Initialization Data to that stored in movie or movie fragment boxes.</p></div>
+ <div class="note"><div class="note-title" aria-level="1" role="heading" id="h_note_1"><span>Note</span></div><p class="">ISO Common Encryption 2nd Edition [<cite><a class="bibref" href="#bib-CENC-2ND">CENC-2ND</a></cite>] also specifies storage of a 'pssh' box base64 encoded in an XML element of the form <cenc:pssh (base64 'pssh')>. For instance, DASH manifests may provide 'pssh' boxes in this format, each contained in a ContentProtection Descriptor element identified by a SystemID. These 'pssh' boxes may be decoded and concatenated by an application to provide equivalent Initialization Data to that stored in movie or movie fragment boxes.</p></div>
</section>
<section id="common-system" typeof="bibo:Chapter" resource="#common-system" rel="bibo:Chapter">
- <!--OddPage--><h2 aria-level="1" role="heading" id="h2_common-system"><span class="secno">4. </span>Common SystemID and PSSH Box Format</h2>
+ <!--OddPage--><h2 role="heading" id="h2_common-system"><span class="secno">4. </span>Common SystemID and PSSH Box Format</h2>
<p>This section defines a common open SystemID and PSSH box format for use with EME.
- Key System implementations supporting ISO Common Encryption should support this SystemID and format, though they may prefer another SystemID when present in the Initialization Data.
- It is also recommended that media resources contain appropriate PSSH box(es) for this SystemID so that they may be used by any Key System implementation that supports it.</p>
+ Key System implementations supporting ISO Common Encryption <em class="rfc2119" title="MUST">MUST</em> support this SystemID and format.
+ Media resources for use with EME <em class="rfc2119" title="SHOULD">SHOULD</em> contain appropriate PSSH box(es) for this SystemID.
+ </p><div class="note"><div class="note-title" aria-level="1" role="heading" id="h_note_2"><span>Note</span></div><p class="">
+ Use of this SystemID is <em class="rfc2119" title="RECOMMENDED">RECOMMENDED</em> for applications, packagers, and implementors.
+ Use of other SystemIDs with the EME APIs is discouraged.
+ 'pssh' box(es) for this SystemID <em class="rfc2119" title="SHOULD">SHOULD</em> be included in all new or repackaged content so that the content can be used with any compliant Key System.
+ For existing content, applications may alternatively obtain a 'pssh' box containing this SystemID or another Initialization Data Type (e.g. <a href="keyids-format.html">keyids</a>) from another source.
+ </p></div>
+ <div class="note"><div class="note-title" aria-level="1" role="heading" id="h_note_3"><span>Note</span></div><p class="">Implementations <em class="rfc2119" title="MAY">MAY</em> support other SystemIDs for backwards compatibility with existing streams.</p></div>
+
<p><a href="encrypted-media.html#clear-key">Clear Key</a> uses this SystemID for ISO Common Encryption content.
When <code><a href="encrypted-media.html#dom-createsession">createSession()</a></code> is called with <var>initDataType</var> "cenc", the Clear Key CDM will use the PSSH box with this SystemID to generate a license request.
</p>
<section id="common-system-definition" typeof="bibo:Chapter" resource="#common-system-definition" rel="bibo:Chapter">
- <h3 aria-level="2" role="heading" id="h3_common-system-definition"><span class="secno">4.1 </span>Definition</h3>
+ <h3 role="heading" id="h3_common-system-definition"><span class="secno">4.1 </span>Definition</h3>
<p>The SystemID is 1077efec-c0b2-4d02-ace3-3c1e52e2fb4b.</p>
<p>The PSSH box format is as follows. It follows version 1 of the 'pssh' box as defined in ISO Common Encryption 2nd Edition [<cite><a class="bibref" href="#bib-CENC-2ND">CENC-2ND</a></cite>].</p>
<dl>
@@ -389,7 +405,7 @@
</dl>
</section>
<section class="informative" id="example">
- <h3 aria-level="2" role="heading" id="h3_example"><span class="secno">4.2 </span>Example</h3><p><em>This section is non-normative.</em></p>
+ <h3 role="heading" id="h3_example"><span class="secno">4.2 </span>Example</h3><p><em>This section is non-normative.</em></p>
<p>The following example contains two key IDs.</p>
<div class="example"><div class="example-title"><span>Example 1</span></div><pre class="example">var pssh = [
0x00, 0x00, 0x00, 0x4c, 0x70, 0x73, 0x73, 0x68, // BMFF box header (76 bytes, 'pssh')
@@ -408,7 +424,7 @@
-<form id="bug-assist-form" action="//www.w3.org/Bugs/Public/enter_bug.cgi" target="_blank">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="product" value="HTML WG"><input type="hidden" name="component" value="Encrypted Media Extensions">.</form><section id="references" class="appendix" typeof="bibo:Chapter" resource="#references" rel="bibo:Chapter"><!--OddPage--><h2 aria-level="1" role="heading" id="h2_references"><span class="secno">A. </span>References</h2><section id="normative-references" typeof="bibo:Chapter" resource="#normative-references" rel="bibo:Chapter"><h3 aria-level="2" role="heading" id="h3_normative-references"><span class="secno">A.1 </span>Normative references</h3><dl class="bibliography" about=""><dt id="bib-BMFF">[BMFF]</dt><dd rel="dcterms:requires"><a href="http://standards.iso.org/ittf/PubliclyAvailableStandards/c061988_ISO_IEC_14496-12_2012.zip"><cite>ISO/IEC 14496-12:2012, Information technology -- Coding of audio-visual objects -- Part 12: ISO base media file format</cite></a>. International Standard. URL: <a href="http://standards.iso.org/ittf/PubliclyAvailableStandards/c061988_ISO_IEC_14496-12_2012.zip">http://standards.iso.org/ittf/PubliclyAvailableStandards/c061988_ISO_IEC_14496-12_2012.zip</a>
+<form id="bug-assist-form" action="//www.w3.org/Bugs/Public/enter_bug.cgi" target="_blank">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="product" value="HTML WG"><input type="hidden" name="component" value="Encrypted Media Extensions">.</form><section id="references" class="appendix" typeof="bibo:Chapter" resource="#references" rel="bibo:Chapter"><!--OddPage--><h2 role="heading" id="h2_references"><span class="secno">A. </span>References</h2><section id="normative-references" typeof="bibo:Chapter" resource="#normative-references" rel="bibo:Chapter"><h3 role="heading" id="h3_normative-references"><span class="secno">A.1 </span>Normative references</h3><dl class="bibliography" about=""><dt id="bib-BMFF">[BMFF]</dt><dd rel="dcterms:requires"><a href="http://standards.iso.org/ittf/PubliclyAvailableStandards/c061988_ISO_IEC_14496-12_2012.zip"><cite>ISO/IEC 14496-12:2012, Information technology -- Coding of audio-visual objects -- Part 12: ISO base media file format</cite></a>. International Standard. URL: <a href="http://standards.iso.org/ittf/PubliclyAvailableStandards/c061988_ISO_IEC_14496-12_2012.zip">http://standards.iso.org/ittf/PubliclyAvailableStandards/c061988_ISO_IEC_14496-12_2012.zip</a>
</dd><dt id="bib-CENC-1ST">[CENC-1ST]</dt><dd rel="dcterms:requires"><a href="https://www.iso.org/obp/ui/#iso:std:iso-iec:23001:-7:ed-1:v1"><cite>ISO/IEC 23001-7:2012, Information technology -- MPEG systems technologies -- Part 7: Common encryption in ISO base media file format files</cite></a>. International Standard. URL: <a href="https://www.iso.org/obp/ui/#iso:std:iso-iec:23001:-7:ed-1:v1">https://www.iso.org/obp/ui/#iso:std:iso-iec:23001:-7:ed-1:v1</a>
</dd><dt id="bib-CENC-2ND">[CENC-2ND]</dt><dd rel="dcterms:requires"><cite>ISO/IEC DIS 23001-7 2nd Edition</cite>. Draft International Standard.
</dd></dl></section></section></body></html>
\ No newline at end of file
--- a/encrypted-media/encrypted-media.html Fri Oct 17 10:23:02 2014 -0700
+++ b/encrypted-media/encrypted-media.html Fri Oct 17 11:57:49 2014 -0700
@@ -445,7 +445,7 @@
</p>
<h1 class="title p-name" id="title" property="dcterms:title">Encrypted Media Extensions</h1>
- <h2 property="dcterms:issued" datatype="xsd:dateTime" content="2014-10-17T17:22:34.000Z" id="w3c-editor-s-draft-17-october-2014"><abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft <time class="dt-published" datetime="2014-10-17">17 October 2014</time></h2>
+ <h2 property="dcterms:issued" datatype="xsd:dateTime" content="2014-10-17T18:49:57.000Z" id="w3c-editor-s-draft-17-october-2014"><abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft <time class="dt-published" datetime="2014-10-17">17 October 2014</time></h2>
<dl>
<dt>This version:</dt>
@@ -739,6 +739,14 @@
It <em class="rfc2119" title="MUST">MUST</em> only contain information related to the keys required to play a given set of stream(s) or <a href="http://www.w3.org/TR/html5/embedded-content-0.html#media-data">media data</a>.
It <em class="rfc2119" title="MUST NOT">MUST NOT</em> contain application data, client-specific data, user-specific data, or <a href="#decryption-key">key(s)</a>.
</p>
+
+ <p>Initialization Data <em class="rfc2119" title="SHOULD NOT">SHOULD NOT</em> contain Key System-specific data or values.
+ Implementations <em class="rfc2119" title="MUST">MUST</em> support the common formats defined [<cite><a class="bibref" href="#bib-EME-REGISTRY">EME-REGISTRY</a></cite>] for each <a href="#initialization-data-type">Initialization Data Type</a> they support.
+ </p>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_8"><span>Note</span></div><p class="">
+ Use of proprietary formats/contents is discouraged, and supporting or using <em>only</em> proprietary formats is strongly discouraged.
+ Proprietary formats should only be used with pre-existing content or on pre-existing devices that do not support the common formats.
+ </p></div>
</dd>
<dt id="cross-origin">Cross Origin Limitations</dt>
@@ -819,7 +827,7 @@
<ol>
<li><p>If the member’s value cannot be satisfied together in combination with the previous members, continue to the next iteration of the loop.</p></li>
</ol>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_8"><span>Note</span></div><p class="">Unrecognized dictionary members are ignored per [<cite><a class="bibref" href="#bib-WebIDL">WebIDL</a></cite>], and will never reach this algorithm. Thus, they cannot be considered as part of the combination.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_9"><span>Note</span></div><p class="">Unrecognized dictionary members are ignored per [<cite><a class="bibref" href="#bib-WebIDL">WebIDL</a></cite>], and will never reach this algorithm. Thus, they cannot be considered as part of the combination.</p></div>
</li><li>
<p>If <var title="true">keySystem</var> is supported and allowed in the <a href="http://www.w3.org/TR/html5/browsers.html#origin-0">origin</a> of the calling context's <a href="http://dom.spec.whatwg.org/#concept-document">Document</a> in the configuration specified by the combination of the values in <var>combination</var>, execute the following steps:</p>
<ol>
@@ -837,7 +845,7 @@
</ol>
</li>
<li><p>Reject <var>promise</var> with a new <code><a href="http://heycam.github.io/webidl/#dfn-DOMException">DOMException</a></code> whose name is <code><a href="#dfn-NotSupportedError">NotSupportedError</a></code>.</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_9"><span>Note</span></div><p class="">There were no supported combinations in <code>supportedConfigurations</code>.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_10"><span>Note</span></div><p class="">There were no supported combinations in <code>supportedConfigurations</code>.</p></div>
</li>
</ol>
</li>
@@ -877,7 +885,7 @@
</dd><dt id="widl-MediaKeySystemOptions-stateful"><code>stateful</code> of type <span class="idlMemberType"><a href="#idl-def-MediaKeysRequirement" class="idlType"><code>MediaKeysRequirement</code></a></span>, defaulting to <code>"optional"</code></dt><dd>
Whether the ability to persist state is required. This includes session data and any other type of state.<br>
Only <code><a href="#idl-def-SessionType.temporary">"temporary"</a></code> sessions may be created when statefulness is not supported.
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_10"><span>Note</span></div><p class="">
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_11"><span>Note</span></div><p class="">
Except for <code><a href="#idl-def-SessionType.persistent">"persistent"</a></code> sessions, the need and ability to store state is Key System implementation-specific and may vary by feature used.</p></div>
</dd><dt id="widl-MediaKeySystemOptions-uniqueidentifier"><code>uniqueidentifier</code> of type <span class="idlMemberType"><a href="#idl-def-MediaKeysRequirement" class="idlType"><code>MediaKeysRequirement</code></a></span>, defaulting to <code>"optional"</code></dt><dd>
Whether a unique identifier is required.
@@ -989,8 +997,8 @@
<li><p>Return <var title="true">session</var>.</p></li>
</ol></dd><dt id="widl-MediaKeys-setServerCertificate-Promise-void--ArrayBuffer-ArrayBufferView-serverCertificate"><code>setServerCertificate</code></dt><dd>
<p id="server-certificate">Provides a server certificate to be used to encrypt messages to the license server.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_11"><span>Note</span></div><p class="">The contents of <var title="true">serverCertificate</var> are <a href="#key-system">Key System</a>-specific.</p></div>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_12"><span>Note</span></div><p class="">Key systems that use such certificates should also support requesting the certificate from the server via an additional round trip. This simplifies interoperability for applications that are not designed to provide certificates to specific key systems.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_12"><span>Note</span></div><p class="">The contents of <var title="true">serverCertificate</var> are <a href="#key-system">Key System</a>-specific.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_13"><span>Note</span></div><p class="">Key systems that use such certificates should also support requesting the certificate from the server via an additional round trip. This simplifies interoperability for applications that are not designed to provide certificates to specific key systems.</p></div>
<table class="parameters"><tbody><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><td class="prmName">serverCertificate</td><td class="prmType"><code>(ArrayBuffer or ArrayBufferView)</code></td><td class="prmNullFalse"><span role="img" aria-label="False">✘</span></td><td class="prmOptFalse"><span role="img" aria-label="False">✘</span></td><td class="prmDesc"></td></tr></tbody></table><div><em>Return type: </em><code>Promise<void></code></div><p>When this method is invoked, the user agent must run the following steps:</p><ol class="method-algorithm">
@@ -1038,7 +1046,7 @@
<p>The <a href="#session-id">Session Id</a> for this object and the associated key(s) or license(s).</p>
</dd></dl></section><section id="methods-3"><h3 role="heading" id="h3_methods-3"><span class="secno">5.2 </span>Methods</h3><dl class="methods"><dt id="widl-MediaKeySession-close-Promise-void"><code>close</code></dt><dd>
<p>Indicates that the application no longer needs the session and the CDM should release any resources associated with this object and close it.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_13"><span>Note</span></div><p class="">The returned promise is resolved when the request has been processed, and the <code><a href="#widl-MediaKeySession-closed">closed</a></code> attribute promise is resolved when the session is closed.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_14"><span>Note</span></div><p class="">The returned promise is resolved when the request has been processed, and the <code><a href="#widl-MediaKeySession-closed">closed</a></code> attribute promise is resolved when the session is closed.</p></div>
<div><em>No parameters.</em></div><div><em>Return type: </em><code>Promise<void></code></div><p>When this method is invoked, the user agent must run the following steps:</p><ol class="method-algorithm">
@@ -1082,7 +1090,7 @@
<ol>
<li><p>If the <var>init data</var> is not valid for <var title="true">initDataType</var>, reject <var>promise</var> with a new <code><a href="http://heycam.github.io/webidl/#dfn-DOMException">DOMException</a></code> whose name is <code><a href="#dfn-InvalidAccessError">InvalidAccessError</a></code>.</p></li>
<li><p>Let <var>sanitized init data</var> be a validated and/or sanitized version of <var>init data</var>.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_14"><span>Note</span></div><p class="">The user agent should thoroughly validate the Initialization Data before passing it to the CDM.
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_15"><span>Note</span></div><p class="">The user agent should thoroughly validate the Initialization Data before passing it to the CDM.
This may include verifying values are within reasonable limits, stripping irrelevant data or fields, pre-parsing it, sanitizing it, and/or generating a fully sanitized version.
The user agent should check that the length and values of fields are reasonable.
Unknown fields should be rejected or removed.
@@ -1100,21 +1108,21 @@
<dl class="switch">
<dt>If <var title="true">session type</var> is <code><a href="#idl-def-SessionType.temporary">"temporary"</a></code></dt>
<dd>Let <var title="true">requested session type</var> be a temporary non-persisted session.<p></p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_15"><span>Note</span></div><p class="">The returned license must not be persistable.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_16"><span>Note</span></div><p class="">The returned license must not be persistable.</p></div>
</dd>
<dt>If <var title="true">session type</var> is <code><a href="#idl-def-SessionType.persistent">"persistent"</a></code></dt>
<dd>Let <var title="true">requested session type</var> be a persistable session.<p>
- </p><div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_16"><span>Note</span></div><p class="">The returned license may be persistable.</p></div>
+ </p><div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_17"><span>Note</span></div><p class="">The returned license may be persistable.</p></div>
</dd>
</dl>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_17"><span>Note</span></div><p class="">The license server determines the type of license that is returned, either persistent or non-persistent. A persistent license cannot be added to a non-persistable session.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_18"><span>Note</span></div><p class="">The license server determines the type of license that is returned, either persistent or non-persistent. A persistent license cannot be added to a non-persistable session.</p></div>
</li>
<li><p>Let <var title="true">session id</var> be a unique <a href="#session-id">Session Id</a> string.</p>
<p>If <var title="true">session type</var> is <code><a href="#idl-def-SessionType.persistent">"persistent"</a></code>, the ID <em class="rfc2119" title="MUST">MUST</em> be unique within the the <a href="http://www.w3.org/TR/html5/browsers.html#origin-0">origin</a> of this object's <a href="http://dom.spec.whatwg.org/#concept-document">Document</a> over time, including across Documents and browsing sessions.</p>
</li>
<li><p>Let <var title="true">message</var> be a request for the <var title="true">requested session type</var> generated based on the <var>init data</var>, which is interpreted per <var title="true">initDataType</var>.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_18"><span>Note</span></div><p class="">For example, a license request.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_19"><span>Note</span></div><p class="">For example, a license request.</p></div>
<p>The <var title="true">cdm</var> <em class="rfc2119" title="MUST NOT">MUST NOT</em> use any stream-specific data, including <a href="http://www.w3.org/TR/html5/embedded-content-0.html#media-data">media data</a>, not provided via the <var>init data</var>.</p>
<p>The <var title="true">cdm</var> <em class="rfc2119" title="SHOULD NOT">SHOULD NOT</em> store session data, including the session ID, at this point. See <a href="#session-storage">Session Storage and Persistence</a>.</p>
</li>
@@ -1167,7 +1175,7 @@
<li><p>Run the following steps asynchronously:</p>
<ol>
<li><p>Let <var>sanitized session ID</var> be a validated and/or sanitized version of <var title="true">sessionId</var>.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_19"><span>Note</span></div><p class="">The user agent should thoroughly validate the sessionId value before passing it to the CDM.
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_20"><span>Note</span></div><p class="">The user agent should thoroughly validate the sessionId value before passing it to the CDM.
At a minimum, this should include checking that the length and value (e.g. alphanumeric) are reasonable.
</p></div>
</li>
@@ -1183,7 +1191,7 @@
<li><p>Let <var title="true">session data</var> be the data stored for the <var>sanitized session ID</var> in the <var title="true">origin</var>.
This <em class="rfc2119" title="MUST NOT">MUST NOT</em> include data from other origin(s) or that is not associated with an origin.</p></li>
<li><p>If there is an unclosed <code><a href="#idl-def-SessionType.persistent">"persistent"</a></code> session in any <a href="http://dom.spec.whatwg.org/#concept-document">Document</a> representing the <var title="true">session data</var>, reject <var>promise</var> with a new <code><a href="http://heycam.github.io/webidl/#dfn-DOMException">DOMException</a></code> whose name is <code><a href="#dfn-QuotaExceededError">QuotaExceededError</a></code>.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_20"><span>Note</span></div><p class="">In other words, do not create a session if a non-closed persistent session already exists for this <var>sanitized session ID</var> in any browsing context.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_21"><span>Note</span></div><p class="">In other words, do not create a session if a non-closed persistent session already exists for this <var>sanitized session ID</var> in any browsing context.</p></div>
</li>
<li><p>Load the <var title="true">session data</var>.</p></li>
<li><p>If the <var title="true">session data</var> indicates an expiration time for the session, let <var title="true">expiration time</var> be the expiration time in milliseconds since 01 January 1970 UTC.</p></li>
@@ -1225,7 +1233,7 @@
<p>Process the remove request.</p>
<p>This <em class="rfc2119" title="MAY">MAY</em> involve exchanging message(s) with the application.</p>
<p>Unless this step fails, the CDM <em class="rfc2119" title="MUST">MUST</em> have cleared all stored session data associated with this object, including the <code><a href="#widl-MediaKeySession-sessionId">sessionId</a></code>, before proceeding to the next step.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_21"><span>Note</span></div><p class="">A subsequent call to <code><a href="#widl-MediaKeySession-load-Promise-boolean--DOMString-sessionId">load()</a></code> with the value <code><a href="#widl-MediaKeySession-sessionId">sessionId</a></code> would fail because there is no data stored for that session ID.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_22"><span>Note</span></div><p class="">A subsequent call to <code><a href="#widl-MediaKeySession-load-Promise-boolean--DOMString-sessionId">load()</a></code> with the value <code><a href="#widl-MediaKeySession-sessionId">sessionId</a></code> would fail because there is no data stored for that session ID.</p></div>
</li>
</ol>
</li>
@@ -1241,7 +1249,7 @@
<li><p>Return <var>promise</var>.</p></li>
</ol></dd><dt id="widl-MediaKeySession-update-Promise-void--ArrayBuffer-ArrayBufferView-response"><code>update</code></dt><dd>
<p>Provides messages, including licenses, to the CDM.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_22"><span>Note</span></div><p class="">The contents of <var title="true">response</var> are <a href="#key-system">Key System</a>-specific.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_23"><span>Note</span></div><p class="">The contents of <var title="true">response</var> are <a href="#key-system">Key System</a>-specific.</p></div>
<table class="parameters"><tbody><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><td class="prmName">response</td><td class="prmType"><code>(ArrayBuffer or ArrayBufferView)</code></td><td class="prmNullFalse"><span role="img" aria-label="False">✘</span></td><td class="prmOptFalse"><span role="img" aria-label="False">✘</span></td><td class="prmDesc"></td></tr></tbody></table><div><em>Return type: </em><code>Promise<void></code></div><p>When this method is invoked, the user agent must run the following steps:</p><ol class="method-algorithm">
@@ -1252,7 +1260,7 @@
<li><p>Run the following steps asynchronously:</p>
<ol>
<li><p>Let <var>sanitized response</var> be a validated and/or sanitized version of <var>response copy</var>.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_23"><span>Note</span></div><p class="">The user agent should thoroughly validate the response before passing it to the CDM.
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_24"><span>Note</span></div><p class="">The user agent should thoroughly validate the response before passing it to the CDM.
This may include verifying values are within reasonable limits, stripping irrelevant data or fields, pre-parsing it, sanitizing it, and/or generating a fully sanitized version.
The user agent should check that the length and values of fields are reasonable.
Unknown fields should be rejected or removed.
@@ -1277,10 +1285,10 @@
<dd>Reject <var>promise</var> with a new <code><a href="http://heycam.github.io/webidl/#dfn-DOMException">DOMException</a></code> whose name is <code><a href="#dfn-InvalidAccessError">InvalidAccessError</a></code>.</dd>
</dl>
<p>See also <a href="#session-storage">Session Storage and Persistence</a>.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_24"><span>Note</span></div><p class="">When <var>sanitized response</var> contains key(s) and/or related data, <var title="true">cdm</var> will likely cache the key and related data indexed by key ID.</p></div>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_25"><span>Note</span></div><p class="">The replacement algorithm within a session is <a href="#key-system">Key System</a>-dependent.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_25"><span>Note</span></div><p class="">When <var>sanitized response</var> contains key(s) and/or related data, <var title="true">cdm</var> will likely cache the key and related data indexed by key ID.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_26"><span>Note</span></div><p class="">The replacement algorithm within a session is <a href="#key-system">Key System</a>-dependent.</p></div>
<p>Keys from different sessions <em class="rfc2119" title="SHOULD">SHOULD</em> be cached independently such that closing one session does not affect keys in other sessions, even if they have overlapping key IDs.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_26"><span>Note</span></div><p class="">It is <em class="rfc2119" title="RECOMMENDED">RECOMMENDED</em> that CDM implementations support a standard and reasonably high minimum number of keys per <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> object, including a standard replacement algorithm, and a standard and reasonably high minimum number of <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> objects.
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_27"><span>Note</span></div><p class="">It is <em class="rfc2119" title="RECOMMENDED">RECOMMENDED</em> that CDM implementations support a standard and reasonably high minimum number of keys per <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> object, including a standard replacement algorithm, and a standard and reasonably high minimum number of <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> objects.
This enables a reasonable number of key rotation algorithms to be implemented across user agents and may reduce the likelihood of playback interruptions in use cases that involve various streams in the same element (i.e. adaptive streams, various audio and video tracks) using different keys.
</p></div>
</li>
@@ -1343,7 +1351,7 @@
<section id="mediakeysession-events" class="informative" typeof="bibo:Chapter" resource="#mediakeysession-events" rel="bibo:Chapter">
<h3 role="heading" id="h3_mediakeysession-events"><span class="secno">5.4 </span>Event Summary</h3><p><em>This section is non-normative.</em></p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_27"><span>Note</span></div><p class="">In some implementations, <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> objects may not fire any events until the <code><a href="#idl-def-MediaKeys">MediaKeys</a></code> object is associated with a media element using <code><a href="#widl-HTMLMediaElement-setMediaKeys-Promise-void--MediaKeys-mediaKeys">setMediaKeys()</a></code>.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_28"><span>Note</span></div><p class="">In some implementations, <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> objects may not fire any events until the <code><a href="#idl-def-MediaKeys">MediaKeys</a></code> object is associated with a media element using <code><a href="#widl-HTMLMediaElement-setMediaKeys-Promise-void--MediaKeys-mediaKeys">setMediaKeys()</a></code>.</p></div>
<table class="old-table">
<thead>
@@ -1402,7 +1410,7 @@
<li><p><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-keyschange">keyschange</a></code> at the <var title="true">session</var>.</p></li>
<li><p><a href="http://www.w3.org/TR/html5/webappapis.html#queue-a-task">Queue a task</a> to run the <a href="#algorithms-resume-playback">attempt to resume playback if necessary algorithm</a> on each of the media element(s) whose <code><a href="#widl-HTMLMediaElement-mediaKeys">mediaKeys</a></code> attribute is the MediaKeys object that created the <var title="true">session</var>.</p>
<p>The user agent <em class="rfc2119" title="MAY">MAY</em> choose to skip this step if it knows resuming will fail.</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_28"><span>Note</span></div><p class="">For example, the user agent may skip this step if no additional keys became available.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_29"><span>Note</span></div><p class="">For example, the user agent may skip this step if no additional keys became available.</p></div>
</li>
</ol>
</section>
@@ -1425,7 +1433,7 @@
<section id="algorithms-session-close" typeof="bibo:Chapter" resource="#algorithms-session-close" rel="bibo:Chapter">
<h4 role="heading" id="h4_algorithms-session-close"><span class="secno">5.5.4 </span>Session Close</h4>
<p>The Session Close algorithm is run when the CDM closes the session associated with a <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> object.</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_29"><span>Note</span></div><p class="">The CDM may close a session at any point, such as in response to a <code><a href="#widl-MediaKeySession-close-Promise-void">close()</a></code> call, when the session is no longer needed, or when system resources are lost.
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_30"><span>Note</span></div><p class="">The CDM may close a session at any point, such as in response to a <code><a href="#widl-MediaKeySession-close-Promise-void">close()</a></code> call, when the session is no longer needed, or when system resources are lost.
Keys in other sessions <em class="rfc2119" title="SHOULD">SHOULD</em> be unaffected, even if they have overlapping key IDs.
</p></div>
<p>The following steps are run:</p>
@@ -1512,7 +1520,7 @@
<p>An application that creates a <code><a href="#idl-def-SessionType.persistent">"persistent"</a></code> session <em class="rfc2119" title="SHOULD">SHOULD</em> later remove the stored data using <code><a href="#widl-MediaKeySession-remove-Promise-void">remove()</a></code>.
The CDM <em class="rfc2119" title="MAY">MAY</em> also remove sessions as appropriate, but applications <em class="rfc2119" title="SHOULD NOT">SHOULD NOT</em> rely on this.
</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_30"><span>Note</span></div><p class="">See the <a href="#security">Security Considerations</a> and <a href="#privacy">Privacy Considerations</a> sections for additional considerations when supporting persistent storage.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_31"><span>Note</span></div><p class="">See the <a href="#security">Security Considerations</a> and <a href="#privacy">Privacy Considerations</a> sections for additional considerations when supporting persistent storage.</p></div>
</section>
</section>
@@ -1552,8 +1560,8 @@
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_33"><span>Note</span></div><p class="">Support for clearing or replacing the associated <code><a href="#idl-def-MediaKeys">MediaKeys</a></code> object during playback is a quality of implementation issue. In many cases it will result in a bad user experience or rejected promise.</p></div>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_34"><span>Note</span></div><p class="">As a best practice, applications should create a MediaKeys object and call <code><a href="#widl-HTMLMediaElement-setMediaKeys-Promise-void--MediaKeys-mediaKeys">setMediaKeys()</a></code> before providing <a href="http://www.w3.org/TR/html5/embedded-content-0.html#media-data">media data</a> (for example, setting the <code><a href="http://www.w3.org/TR/html5/embedded-content-0.html#attr-media-src">src</a></code> attribute). This avoids potential delays in some implementations.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_34"><span>Note</span></div><p class="">Support for clearing or replacing the associated <code><a href="#idl-def-MediaKeys">MediaKeys</a></code> object during playback is a quality of implementation issue. In many cases it will result in a bad user experience or rejected promise.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_35"><span>Note</span></div><p class="">As a best practice, applications should create a MediaKeys object and call <code><a href="#widl-HTMLMediaElement-setMediaKeys-Promise-void--MediaKeys-mediaKeys">setMediaKeys()</a></code> before providing <a href="http://www.w3.org/TR/html5/embedded-content-0.html#media-data">media data</a> (for example, setting the <code><a href="http://www.w3.org/TR/html5/embedded-content-0.html#attr-media-src">src</a></code> attribute). This avoids potential delays in some implementations.</p></div>
<table class="parameters"><tbody><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><td class="prmName">mediaKeys</td><td class="prmType"><code><a href="#idl-def-MediaKeys" class="idlType"><code>MediaKeys</code></a></code></td><td class="prmNullTrue"><span role="img" aria-label="True">✔</span></td><td class="prmOptFalse"><span role="img" aria-label="False">✘</span></td><td class="prmDesc"></td></tr></tbody></table><div><em>Return type: </em><code>Promise<void></code></div><p>When this method is invoked, the user agent must run the following steps:</p><ol class="method-algorithm">
<!-- For simplicity and consistency, do not allow multiple pending calls. -->
<li><p>If <var>mediaKeys</var> and the <code><a href="#widl-HTMLMediaElement-mediaKeys">mediaKeys</a></code> attribute are the same object, return a resolved promise.</p></li>
@@ -1567,7 +1575,7 @@
<ol>
<li><p>If the user agent or CDM do not support removing the association, let this object's <var title="true">attaching media keys</var> value be false and reject <var>promise</var> with a new <code><a href="http://heycam.github.io/webidl/#dfn-DOMException">DOMException</a></code> whose name is <code><a href="#dfn-NotSupportedError">NotSupportedError</a></code>.</p></li>
<li><p>If the association cannot currently be removed, let this object's <var title="true">attaching media keys</var> value be false and reject <var>promise</var> with a new <code><a href="http://heycam.github.io/webidl/#dfn-DOMException">DOMException</a></code> whose name is <code><a href="#dfn-InvalidStateError">InvalidStateError</a></code>.</p>
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_31"><span>Note</span></div><p class="">For example, some implementations may not allow removal during playback.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_32"><span>Note</span></div><p class="">For example, some implementations may not allow removal during playback.</p></div>
</li>
<li><p>Stop using the CDM instance represented by the <code><a href="#widl-HTMLMediaElement-mediaKeys">mediaKeys</a></code> attribute to decrypt <a href="http://www.w3.org/TR/html5/embedded-content-0.html#media-data">media data</a> and remove the association with the media element.</p></li>
<li><p>If the preceding step failed, let this object's <var title="true">attaching media keys</var> value be false and reject <var>promise</var> with a new <code><a href="http://heycam.github.io/webidl/#dfn-DOMException">DOMException</a></code> whose name is the appropriate <a href="#error-names">error name</a>.</p></li>
@@ -1585,7 +1593,7 @@
</li>
<li><p><a href="http://www.w3.org/TR/html5/webappapis.html#queue-a-task">Queue a task</a> to run the <a href="#algorithms-resume-playback">attempt to resume playback if necessary algorithm</a> on the media element.</p>
<p>The user agent <em class="rfc2119" title="MAY">MAY</em> choose to skip this step if it knows resuming will fail.</p><p>
- </p><div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_32"><span>Note</span></div><p class="">For example, the user agent may skip this step if <var>mediaKeys</var> has no sessions.</p></div>
+ </p><div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_33"><span>Note</span></div><p class="">For example, the user agent may skip this step if <var>mediaKeys</var> has no sessions.</p></div>
</li>
</ol>
</li>
@@ -1645,7 +1653,7 @@
<td><a href="#idl-def-MediaEncryptedEvent" class="idlType"><code>MediaEncryptedEvent</code></a></td>
<td>The user agent encounters <a href="#initialization-data">Initialization Data</a> in the <a href="http://www.w3.org/TR/html5/embedded-content-0.html#media-data">media data</a>.</td>
<td><code><a href="http://www.w3.org/TR/html5/embedded-content-0.html#dom-media-readystate">readyState</a></code> is equal to <code><a href="http://www.w3.org/TR/html5/embedded-content-0.html#dom-media-have_metadata">HAVE_METADATA</a></code> or greater.
- <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_35"><span>Note</span></div><p class="">It is possible that the element is playing or has played.</p></div>
+ <div class="note"><div class="note-title" aria-level="2" role="heading" id="h_note_36"><span>Note</span></div><p class="">It is possible that the element is playing or has played.</p></div>
</td>
</tr>
</tbody>
@@ -1668,7 +1676,7 @@
<li><p>Let <var title="">initDataType</var> be the string representing the <a href="#initialization-data-type">Initialization Data Type</a> of the Initialization Data.</p></li>
<li><p>Let <var title="">initData</var> be the Initialization Data.</p></li>
</ol>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_36"><span>Note</span></div><p class="">While the media element may allow loading of "Optionally-blockable Content" [<cite><a class="bibref" href="#bib-MIXED-CONTENT">MIXED-CONTENT</a></cite>], the user agent <em class="rfc2119" title="MUST NOT">MUST NOT</em> expose Initialization Data from such media data to the application.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_37"><span>Note</span></div><p class="">While the media element may allow loading of "Optionally-blockable Content" [<cite><a class="bibref" href="#bib-MIXED-CONTENT">MIXED-CONTENT</a></cite>], the user agent <em class="rfc2119" title="MUST NOT">MUST NOT</em> expose Initialization Data from such media data to the application.</p></div>
</li>
<li>
<p><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-encrypted">encrypted</a></code> at the media element.</p>
@@ -1677,8 +1685,8 @@
<code><a href="#widl-MediaEncryptedEventInit-initDataType">initDataType</a></code> = <var title="">initDataType</var><br><br>
<code><a href="#widl-MediaEncryptedEventInit-initData">initData</a></code> = <var title="">initData</var>
</li></ul>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_37"><span>Note</span></div><p class=""><code><a href="http://www.w3.org/TR/html5/embedded-content-0.html#dom-media-readystate">readyState</a></code> is <em>not</em> changed and no algorithms are aborted. This event merely provides information.</p></div>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_38"><span>Note</span></div><p class="">The <code><a href="#widl-MediaEncryptedEventInit-initData">initData</a></code> attribute will be null if the media data is <em>not</em> <a href="http://www.w3.org/TR/html5/infrastructure.html#cors-same-origin">CORS-same-origin</a> or is <a href="#mixed-content">mixed content</a>.
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_38"><span>Note</span></div><p class=""><code><a href="http://www.w3.org/TR/html5/embedded-content-0.html#dom-media-readystate">readyState</a></code> is <em>not</em> changed and no algorithms are aborted. This event merely provides information.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_39"><span>Note</span></div><p class="">The <code><a href="#widl-MediaEncryptedEventInit-initData">initData</a></code> attribute will be null if the media data is <em>not</em> <a href="http://www.w3.org/TR/html5/infrastructure.html#cors-same-origin">CORS-same-origin</a> or is <a href="#mixed-content">mixed content</a>.
Applications may retrieve the Initialization Data from an alternate source.
</p></div>
</li>
@@ -1697,10 +1705,10 @@
<li><p>Let <var title="true">media keys</var> be the <code><a href="#idl-def-MediaKeys">MediaKeys</a></code> object referenced by that atribute.</p></li>
<li><p>Let <var title="true">cdm</var> be the CDM loaded during the <a href="#widl-MediaKeySystemAccess-createMediaKeys-Promise-MediaKeys">initialization</a> of the <var title="true">media keys</var>.</p></li>
<li><p>If there is at least one <code><a href="#idl-def-MediaKeySession">MediaKeySession</a></code> created by the <var title="true">media keys</var> on which the <a href="#algorithms-session-close">session close algorithm</a> has not been run, run the following steps:</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_39"><span>Note</span></div><p class="">This check ensures the <var title="true">cdm</var> has finished loading and is a prequisite for a matching key being available.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_40"><span>Note</span></div><p class="">This check ensures the <var title="true">cdm</var> has finished loading and is a prequisite for a matching key being available.</p></div>
<ol>
<li><p>Let the <var title="true">block key ID</var> be the key ID of the current block.</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_40"><span>Note</span></div><p class="">The key ID is generally specified by the container.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_41"><span>Note</span></div><p class="">The key ID is generally specified by the container.</p></div>
</li>
<li><p>Use the <var title="true">cdm</var> to execute the following steps:</p>
<ol>
@@ -1711,7 +1719,7 @@
<dd>Run the following steps:
<ol>
<li><p>Let <var title="">block key</var> be the matching key.</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_41"><span>Note</span></div><p class="">If multiple sessions contain a <em>usable</em> key for the <var title="">block key ID</var>, which key to use is <a href="#key-system">Key System</a>-dependent.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_42"><span>Note</span></div><p class="">If multiple sessions contain a <em>usable</em> key for the <var title="">block key ID</var>, which key to use is <a href="#key-system">Key System</a>-dependent.</p></div>
</li>
<li><p>Use the <var title="true">cdm</var> to decrypt the block using <var title="">block key</var>.</p></li>
<li><p>Follow the steps for the first matching condition from the following list:</p>
@@ -1723,12 +1731,12 @@
<ol>
<li><p>If the <code><a href="#widl-HTMLMediaElement-waitingFor">waitingFor</a></code> attribute on the media element is <code><a href="#idl-def-MediaWaitingFor.key">"key"</a></code>, set the <code><a href="#widl-HTMLMediaElement-waitingFor">waitingFor</a></code> attribute on the media element to <code><a href="#idl-def-MediaWaitingFor.none">"none"</a></code>.</p></li>
<li><p>Abort these steps and process the decrypted block as normal.</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_42"><span>Note</span></div><p class="">In other words, decode the block.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_43"><span>Note</span></div><p class="">In other words, decode the block.</p></div>
</li>
</ol>
</dd>
</dl>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_43"><span>Note</span></div><p class="">Not all decryption problems (i.e. using the wrong key) will result in a decryption failure. In such cases, no error is fired here but one may be fired during decode.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_44"><span>Note</span></div><p class="">Not all decryption problems (i.e. using the wrong key) will result in a decryption failure. In such cases, no error is fired here but one may be fired during decode.</p></div>
</li>
</ol>
</dd>
@@ -1737,7 +1745,7 @@
<div class="issue"><div class="issue-title" aria-level="3" role="heading" id="h_issue_7"><span>Issue 7</span></div><p class=""><a href="https://www.w3.org/Bugs/Public/show_bug.cgi?id=26372">Bug 26372</a> - It is TBD whether anything should happen in this case.</p></div>
</dd>
</dl>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_44"><span>Note</span></div><p class="">Otherwise, there is no key for the <var title="true">block key ID</var> in any session so continue.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_45"><span>Note</span></div><p class="">Otherwise, there is no key for the <var title="true">block key ID</var> in any session so continue.</p></div>
</li>
</ol>
</li>
@@ -1747,7 +1755,7 @@
</li>
<li>
<p>Run the following steps:</p>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_45"><span>Note</span></div><p class="">These steps are reached when there is no usable key for the block.</p></div>
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_46"><span>Note</span></div><p class="">These steps are reached when there is no usable key for the block.</p></div>
<ol>
<li><p>Run the <a href="#algorithms-queue-waiting">queue a "waiting" event algorithm</a> on the media element.</p></li>
<li><p>Wait for a signal to resume playback.</p></li>
@@ -1755,7 +1763,7 @@
</li>
</ol>
- <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_46"><span>Note</span></div><div class="">
+ <div class="note"><div class="note-title" aria-level="3" role="heading" id="h_note_47"><span>Note</span></div><div class="">
<p>For frame-based encryption, this may be implemented as follows when the media element attempts to decode a frame as part of the <a href="http://www.w3.org/TR/html5/embedded-content-0.html#concept-media-load-resource">resource fetch algorithm</a>:</p>
<ol>
<li><p>Let <var title="">encrypted</var> be false.</p></li>
@@ -1836,7 +1844,7 @@
<section id="common-key-systems" typeof="bibo:Chapter" resource="#common-key-systems" rel="bibo:Chapter">
<!--OddPage--><h2 role="heading" id="h2_common-key-systems"><span class="secno">7. </span>Common Key Systems</h2>
<p>All user agents <em class="rfc2119" title="MUST">MUST</em> support the common key systems described in this section.</p><p>
- </p><div class="note"><div class="note-title" aria-level="1" role="heading" id="h_note_47"><span>Note</span></div><p class="">This ensures that there is a common baseline level of protection that is guaranteed to be supported in all user agents, including those that are entirely open source.
+ </p><div class="note"><div class="note-title" aria-level="1" role="heading" id="h_note_48"><span>Note</span></div><p class="">This ensures that there is a common baseline level of protection that is guaranteed to be supported in all user agents, including those that are entirely open source.
Thus, content providers that need only basic protection can build simple applications that will work on all platforms without needing to work with any content protection providers.
</p></div>