Quelle test_hevc_support.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/media/test/test_hevc_support.html

<!DOCTYPE HTML>
<html>
<head>
<title>Test HEVC video support</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<script type="application/javascript">

/**
* This test is used to check we can get correct HEVC support information from
* `canPlayType` and mediaCapabilities API on different platforms.
*/
const contentType = 'video/mp4; codecs="hev1.1.6.L93.B0"';
const videoConfiguration = {
  type: "file",
  video: {
    contentType,
    width: 1920,
    height: 1080,
    bitrate: 1000000,
    framerate: 30,
  },
};

const supportedOSs = ["WINNT", "Darwin"];

add_task(async function testHEVCSupport() {
  // Disable fingerprinting resistance/protection to get an accurate result.
  await SpecialPowers.pushPrefEnv({
    set: [
      ["privacy.resistFingerprinting", false],
      ["privacy.fingerprintingProtection", false],
    ],
  });
  const os = SpecialPowers.Services.appinfo.OS;
  const canPlay = document.createElement('video').canPlayType(contentType);
  if (supportedOSs.includes(os)) {
    ok(canPlay != "", `HEVC is supported`);
  } else {
    ok(canPlay == "", "HEVC is not supported on current platform");
  }

  const capability = await navigator.mediaCapabilities.decodingInfo(videoConfiguration);
  if (supportedOSs.includes(os)) {
    ok(capability.supported, `HEVC is supported`);
    ok(capability.powerEfficient, `HEVC is powerEfficient`);
  } else {
    ok(!capability.supported, "HEVC is not supported on current platform");
  }
});

add_task(async function testHEVCPrefSupportOnWindows() {
  if (SpecialPowers.Services.appinfo.OS != "WINNT") {
    ok(true, "No need to run this task");
    return;
  }

  // Enable HEVC for normal playback and media engine playback
  await SpecialPowers.pushPrefEnv({
    set: [
      ["media.wmf.hevc.enabled", 1],
    ],
  });
  let capability = await navigator.mediaCapabilities.decodingInfo(videoConfiguration);
  ok(capability.supported, `HEVC is supported`);

  // Enable HEVC for only media engine encrypted playback, which makes
  // non-encrypted HEVC unsupported, but encrypted HEVC is still supported.
  info(`Turn off HEVC for normal non-encrypted playback`);
  await SpecialPowers.pushPrefEnv({
    set: [
      ["media.wmf.hevc.enabled", 2],
      ["media.wmf.media-engine.enabled", 2],
      ["media.eme.playready.enabled", true],
      ["media.eme.mfcdm.origin-filter.enabled", 0],
    ],
  });
  capability = await navigator.mediaCapabilities.decodingInfo(videoConfiguration);
  ok(!capability.supported, "Non-encrypted HEVC is not supported");

  info(`Encrypted HEVC should still be supported via the media engine`);
  const videoEncryptedConfig = {...videoConfiguration};
  videoEncryptedConfig.keySystemConfiguration = {
    keySystem: "com.microsoft.playready.recommendation",
  };
  capability = await navigator.mediaCapabilities.decodingInfo(videoEncryptedConfig);
  ok(capability.supported, `Encrypted HEVC is supported`);
});

</script>
</head>
<body>
</body>
</html>

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