MediaKeys.md

MediaKeys

Namespace: SpawnDev.SpawnJS.JSObjects
Inherits: SpawnJSObject
Source: JSObjects/MediaKeys.cs
MDN Reference: MediaKeys on MDN

https://developer.mozilla.org/en-US/docs/Web/API/MediaKeys

Constructors

Signature	Description
MediaKeys(SpawnJSObjectReference _ref)	Creates a new instance of MediaKeys.

Examples

SpawnDev.SpawnJS Mapping Note: The JavaScript examples below show the standard Web API usage. In SpawnDev.SpawnJS, the same API is available with C# conventions:

• Properties and methods use PascalCase (e.g., readyState becomes ReadyState)
• Events use ActionEvent with +=/-= (e.g., addEventListener("click", fn) becomes OnClick += handler)
• Async methods return Task<T> instead of Promise<T>
• Objects should be disposed with using statements
• Access via JS.Get<MediaKeys>(...) or constructor new MediaKeys(...)

Check if keys are usable with HDCP restriction

const config = [
  {
    videoCapabilities: [
      {
        contentType: 'video/mp4; codecs="avc1.640028"',
        encryptionScheme: "cenc",
        robustness: "SW_SECURE_DECODE", // Widevine L3
      },
    ],
  },
];

getMediaStatus(config);

async function getMediaStatus(config) {
  try {
    const mediaKeySystemAccess = await navigator.requestMediaKeySystemAccess(
      "com.widevine.alpha",
      config,
    );
    const mediaKeys = await mediaKeySystemAccess.createMediaKeys();
    const mediaStatus = await mediaKeys.getStatusForPolicy({
      minHdcpVersion: "2.2",
    });
    log(mediaStatus);

    // Get the content or fallback to an alternative if the
    // keys are not usable
    if (mediaStatus === "usable") {
      console.log("HDCP 2.2 can be enforced.");
      // Fetch the high resolution protected content
    } else {
      log("HDCP 2.2 cannot be enforced");
      // Fallback other content, get license, etc.
    }
  } catch (error) {
    log(error);
  }
}

See full example on MDN