From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- files/zh-cn/web/api/mediakeysession/index.html | 161 +++++++++++++++++++++ .../zh-cn/web/api/mediakeysession/load/index.html | 100 +++++++++++++ 2 files changed, 261 insertions(+) create mode 100644 files/zh-cn/web/api/mediakeysession/index.html create mode 100644 files/zh-cn/web/api/mediakeysession/load/index.html (limited to 'files/zh-cn/web/api/mediakeysession') diff --git a/files/zh-cn/web/api/mediakeysession/index.html b/files/zh-cn/web/api/mediakeysession/index.html new file mode 100644 index 0000000000..2896b7eb8b --- /dev/null +++ b/files/zh-cn/web/api/mediakeysession/index.html @@ -0,0 +1,161 @@ +--- +title: MediaKeySession +slug: Web/API/MediaKeySession +tags: + - API + - Audio + - EncryptedMediaExtensions + - Interface + - Media + - MediaKeySession + - NeedsExample + - NeedsTranslation + - Reference + - TopicStub + - Video +translation_of: Web/API/MediaKeySession +--- +

{{APIRef("EncryptedMediaExtensions")}}{{SeeCompatTable}}

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The MediaKeySession interface of the EncryptedMediaExtensions API represents a context for message exchange with a content decryption module (CDM).

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Properties

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{{domxref("MediaKeySession.closed")}} {{readonlyInline}}
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Returns a {{jsxref("Promise")}} signaling when a MediaKeySession closes. This promise can only be fulfilled and is never rejected. Closing a session means that licenses and keys associated with it are no longer valid for decrypting media data. 
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{{domxref("MediaKeySession.expiration")}} {{readonlyInline}}
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The time after which the keys in the current session can no longer be used to decrypt media data, or NaN if no such time exists. This value is determined by the CDM and measured in milliseconds since January 1, 1970, UTC. This value may change during a session lifetime, such as when an action triggers the start of a window.
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{{domxref("MediaKeySession.keyStatuses")}} {{readonlyInline}}
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Contains a reference to a read-only {{domxref("MediaKeyStatusMap")}} of the current session's keys and their statuses.
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{{domxref("MediaKeySession.sessionId")}} {{readonlyInline}}
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Contains a unique string generated by the CDM for the current media object and its associated keys or licenses.
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Event handlers

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{{domxref("MediaKeySession.onkeystatuseschange")}}
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Sets the {{domxref('EventHandler')}} called when there has been a change in the keys in a session or their statuses.
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{{domxref("MediaKeySession.onmessage")}}
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Sets the {{domxref('EventHandler')}} called when the content decryption module has generated a message for the session.
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Methods

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{{domxref("MediaKeySession.close()")}}
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Returns a {{jsxref("Promise")}} after notifying the current media session is no longer needed and that the CDM should release any resources associated with this object and close it.

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{{domxref("MediaKeySession.generateRequest()")}}
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Returns a {{jsxref("Promise")}} after generating a media request based on initialization data.
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{{domxref("MediaKeySession.load()")}}
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Returns a {{jsxref("Promise")}} that resolves to a boolean value after loading data for a specified session object. 
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{{domxref("MediaKeySession.remove()")}}
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Returns a {{jsxref("Promise")}} after removing any session data associated with the current object.
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{{domxref("MediaKeySession.update()")}}
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Returns a {{jsxref("Promise")}} after loading messages and licenses to the CDM.
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Examples

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// TBD
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Specifications

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SpecificationStatusComment
{{SpecName('EME', '#mediakeysession-interface', 'MediaKeySession')}}{{Spec2('EME')}}Initial definition.
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Browser compatibility

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{{CompatibilityTable}}
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FeatureChromeEdgeFirefox (Gecko)Internet ExplorerOperaSafari (WebKit)
Basic support{{CompatChrome(42.0)}}{{CompatVersionUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatVersionUnknown}}{{CompatUnknown}}
onkeystatuseschange and onmessage{{CompatChrome(55.0)}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatOpera(42)}}{{CompatUnknown}}
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FeatureAndroidAndroid WebviewEdgeFirefox Mobile (Gecko)Firefox OSIE MobileOpera MobileSafari MobileChrome for Android
Basic support{{CompatNo}}{{CompatChrome(43.0)}}{{CompatVersionUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatVersionUnknown}}{{CompatUnknown}}{{CompatChrome(42.0)}}
onkeystatuseschange and onmessage{{CompatNo}}{{CompatChrome(55.0)}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatOperaMobile(42)}}{{CompatUnknown}}{{CompatChrome(55.0)}}
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diff --git a/files/zh-cn/web/api/mediakeysession/load/index.html b/files/zh-cn/web/api/mediakeysession/load/index.html new file mode 100644 index 0000000000..a0e7d234f8 --- /dev/null +++ b/files/zh-cn/web/api/mediakeysession/load/index.html @@ -0,0 +1,100 @@ +--- +title: load() +slug: Web/API/MediaKeySession/load +translation_of: Web/API/MediaKeySession/load +--- +
{{APIRef("EncryptedMediaExtensions")}} {{SeeCompatTable}}
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该MediaKeySession.load()方法返回一个{{jsxref("Promise")}}，它在加载指定的会话对象的数据后解析为一个布尔值。

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句法

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mediaKeySession .load(sessionId).then(function(booleanValue){...});
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参数

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的sessionId
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由当前媒体对象及其相关键或许可证的内容解析模块生成的唯一字符串。
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返回值

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一个{{jsxref("Promise")}}解析为一个布尔值，指示加载是成功还是失败。

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产品规格

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规范状态评论
{{SpecName('EME','＃widl-MediaKeySession-load-Promise-boolean - DOMString-sessionId','load()')}}{{Spec2('EME')}}初始定义
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浏览器兼容

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{{CompatibilityTable}}
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特征铬边缘Firefox(Gecko)IE浏览器歌剧Safari(WebKit)
基本支持{{CompatChrome(42.0)}}{{CompatVersionUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}
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特征Android的Android Webview边缘Firefox Mobile(Gecko)Firefox操作系统IE Mobile歌剧手机Safari手机适用于Android的Chrome
基本支持{{CompatNo}}{{CompatChrome(43.0)}}{{CompatVersionUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatChrome(42.0)}}
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