encrypted-media-playback-encrypted-and-clear-sources.html

<!DOCTYPE html>
<html>
    <head>
        <title>Multiple playbacks alternating between encrypted and clear sources.</title>
        <script src="encrypted-media-utils.js"></script>
        <script src="../../resources/testharness.js"></script>
        <script src="../../resources/testharnessreport.js"></script>
    </head>
    <body>
        <video></video>
        <script>
            async_test(function(test)
            {
                var video = document.querySelector('video');
                var isUpdatePromiseResolved = false;
                var encryptedEventCount = 0;
                var playbackCount = 0;

                // Content to be played. These files must be the same format.
                var encryptedContent = '../content/test-encrypted.webm';
                var unencryptedContent = '../content/test.webm';

                var rawKey = new Uint8Array([0xeb, 0xdd, 0x62, 0xf1, 0x68, 0x14, 0xd2, 0x7b,
                                             0x68, 0xef, 0x12, 0x2a, 0xfc, 0xe4, 0xae, 0x3c]);

                function onEncrypted(event)
                {
                    assert_equals(event.target, video);
                    assert_true(event instanceof window.MediaEncryptedEvent);
                    assert_equals(event.type, 'encrypted');

                    // The same decryption key is used by both the audio and
                    // the video streams so only create a session once. To
                    // avoid issues when comparing the expected.txt file
                    // (which logs the events in the order they occur), create
                    // the session on the second event. This also ensures we
                    // see both events.
                    if (++encryptedEventCount != 2)
                        return;

                    assert_false(video.mediaKeys === null, "video.mediaKeys is null.");
                    var mediaKeySession = video.mediaKeys.createSession();
                    waitForEventAndRunStep('message', mediaKeySession, onMessage, test);
                    mediaKeySession.generateRequest(event.initDataType, event.initData).catch(function(error) {
                        forceTestFailureFromPromise(test, error);
                    });
                }

                function onMessage(event)
                {
                    assert_true(event instanceof window.MediaKeyMessageEvent);
                    assert_equals(event.type, 'message');
                    assert_equals(event.messageType, 'license-request');

                    var keyId = extractSingleKeyIdFromMessage(event.message);
                    var jwkSet = stringToUint8Array(createJWKSet(createJWK(keyId, rawKey)));
                    event.target.update(jwkSet).then(function(result) {
                        isUpdatePromiseResolved = true;
                    }).catch(function(error) {
                        forceTestFailureFromPromise(test, error);
                    });
                }

                function onPlaying(event)
                {
                    // Not using waitForEventAndRunStep() to avoid too many
                    // EVENT(onTimeUpdate) logs.
                    video.addEventListener('timeupdate', onTimeUpdate, true);
                }

                function onTimeUpdate(event)
                {
                    if (event.target.currentTime < 0.2 || !isUpdatePromiseResolved)
                        return;

                    video.removeEventListener('timeupdate', onTimeUpdate, true);

                    if (playbackCount > 2) {
                        test.done();
                        return;
                    }

                    playbackCount++;

                    resetSrc().then(function(){
                      startPlayback();
                    });
                }

                function resetSrc() {
                    encryptedEventCount = 0;
                    video.removeAttribute('src');
                    video.load();
                    return video.setMediaKeys(null);
                }

                function startPlayback() {
                    // Alternate between unencrypted and encrypted files.
                    if (playbackCount % 2) {
                      // Unencrypted files don't require MediaKeys.
                      video.src = unencryptedContent;
                      video.play();
                      return;
                    }

                    navigator.requestMediaKeySystemAccess('org.w3.clearkey', getConfigurationForFile(encryptedContent)).then(function(access) {
                        return access.createMediaKeys();
                    }).then(function(mediaKeys) {
                        return video.setMediaKeys(mediaKeys);
                    }).then(function(result) {
                        video.src = encryptedContent;
                        assert_false(video.mediaKeys === null, "video.mediaKeys is null.");
                        video.play();
                    }).catch(function(error) {
                        forceTestFailureFromPromise(test, error);
                    });
                }

                waitForEventAndRunStep('playing', video, onPlaying, test);
                waitForEventAndRunStep('encrypted', video, onEncrypted, test);
                startPlayback();
            }, 'Multiple playbacks alternating between encrypted and clear sources.');
        </script>
    </body>
</html>
chromium/third_party/blink/web_tests/media/encrypted-media/encrypted-media-playback-encrypted-and-clear-sources.html
