mediasource-timestamp-offset.html

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This WPT test may be referenced by the following Test IDs:
- /media-source/mediasource-timestamp-offset.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->

<html>

    <head>

        <title>SourceBuffer.timestampOffset test cases.</title>

        <script src="/resources/testharness.js"></script>

        <script src="/resources/testharnessreport.js"></script>

        <script src="mediasource-util.js"></script>

    </head>

    <body>

        <div id="log"></div>

        <script>

          function simpleTimestampOffsetTest(value, expected, description)

              mediasource_test(function(test, mediaElement, mediaSource)

                  var segmentInfo = MediaSourceUtil.SEGMENT_INFO;

                  var sourceBuffer = mediaSource.addSourceBuffer(segmentInfo.type);

                  assert_equals(sourceBuffer.timestampOffset, 0,

                      "Initial timestampOffset of a SourceBuffer is 0");

                  if (expected == "TypeError")  {

                      assert_throws_js(TypeError,

                          function() { sourceBuffer.timestampOffset = value; },

                          "setting timestampOffset to " + description + " throws an exception.");

                  } else {

                      sourceBuffer.timestampOffset = value;

                      assert_equals(sourceBuffer.timestampOffset, expected);

                  test.done();

              }, "Test setting SourceBuffer.timestampOffset to " + description + ".");

          simpleTimestampOffsetTest(10.5, 10.5, "a positive number");

          simpleTimestampOffsetTest(-10.4, -10.4, "a negative number");

          simpleTimestampOffsetTest(0, 0, "zero");

          simpleTimestampOffsetTest(Number.POSITIVE_INFINITY, "TypeError", "positive infinity");

          simpleTimestampOffsetTest(Number.NEGATIVE_INFINITY, "TypeError", "negative infinity");

          simpleTimestampOffsetTest(Number.NaN, "TypeError", "NaN");

          simpleTimestampOffsetTest(undefined, "TypeError", "undefined");

          simpleTimestampOffsetTest(null, 0, "null");

          simpleTimestampOffsetTest(false, 0, "false");

          simpleTimestampOffsetTest(true, 1, "true");

          simpleTimestampOffsetTest("10.5", 10.5, "a number string");

          simpleTimestampOffsetTest("", 0, "an empty string");

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)

              var initSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.init);

              var mediaSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.media[0]);

              test.expectEvent(sourceBuffer, "updateend", "initSegment append ended.");

              sourceBuffer.appendBuffer(initSegment);

              test.waitForExpectedEvents(function()

                  test.expectEvent(sourceBuffer, "updateend", "mediaSegment append ended.");

                  sourceBuffer.appendBuffer(mediaSegment);

});

              test.waitForExpectedEvents(function()

                  mediaSource.endOfStream();

                  assert_equals(mediaSource.readyState, "ended");

                  mediaSource.sourceBuffers[0].timestampOffset = 2;

                  assert_equals(mediaSource.readyState, "open");

                  test.expectEvent(mediaSource, "sourceopen", "mediaSource fired 'sourceopen' event.");

});

              test.waitForExpectedEvents(function()

                  test.done();

});

          }, "Test setting timestampOffset in 'ended' state causes a transition to 'open'.");

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)

              var initSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.init);

              var mediaSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.media[0]);

              test.expectEvent(sourceBuffer, "updateend", "initSegment append ended.");

              sourceBuffer.appendBuffer(initSegment);

              assert_equals(mediaSource.sourceBuffers[0].timestampOffset, 0, "read initial value");

              test.waitForExpectedEvents(function()

                  test.expectEvent(sourceBuffer, "updateend", "mediaSegment append ended.");

                  sourceBuffer.appendBuffer(mediaSegment);

                  assert_equals(mediaSource.sourceBuffers[0].timestampOffset, 0,

                      "No change to timestampoffset after segments mode init segment append");

});

              test.waitForExpectedEvents(function()

                  assert_equals(mediaSource.sourceBuffers[0].timestampOffset, 0,

                      "No change to timestampoffset after segments mode media segment append");

                  test.done();

});

          }, "Test getting the initial value of timestampOffset.");

          mediasource_test(function(test, mediaElement, mediaSource)

              var sourceBuffer = mediaSource.addSourceBuffer(MediaSourceUtil.AUDIO_VIDEO_TYPE);

              assert_true(sourceBuffer != null, "New SourceBuffer returned");

              mediaSource.removeSourceBuffer(sourceBuffer);

              assert_equals(mediaSource.sourceBuffers.length, 0, "MediaSource.sourceBuffers is empty");

              assert_equals(mediaSource.activeSourceBuffers.length, 0, "MediaSource.activesourceBuffers is empty");

              assert_throws_dom("InvalidStateError", function()

                  sourceBuffer.timestampOffset = 10;

});

              test.done();

          }, "Test setting timestampoffset after removing the sourcebuffer.");

        </script>

    </body>

</html>