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<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->
<html>
    <head>
        <title>MediaSource.duration &amp; HTMLMediaElement.duration 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>

          var subType = MediaSourceUtil.getSubType(MediaSourceUtil.AUDIO_ONLY_TYPE);
          var manifestFilenameAudio = subType + "/test-a-128k-44100Hz-1ch-manifest.json";
          var manifestFilenameVideo = subType + "/test-v-128k-320x240-30fps-10kfr-manifest.json";

          function mediasource_truncated_duration_seek_test(testFunction, description, options)
          {
              return mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
              {
                  assert_greater_than(segmentInfo.duration, 2, 'Sufficient test media duration');

                  var fullDuration = segmentInfo.duration;
                  var seekTo = fullDuration / 2.0;
                  var truncatedDuration = seekTo / 2.0;

                  mediaElement.play();

                  // Append all the segments
                  test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
                  test.expectEvent(mediaElement, 'playing', 'Playing triggered');
                  sourceBuffer.appendBuffer(mediaData);

                  test.waitForExpectedEvents(function()
                  {
                      test.expectEvent(mediaElement, 'seeking', 'seeking to seekTo');
                      test.expectEvent(mediaElement, 'timeupdate', 'timeupdate while seeking to seekTo');
                      test.expectEvent(mediaElement, 'seeked', 'seeked to seekTo');
                      mediaElement.currentTime = seekTo;
                      assert_true(mediaElement.seeking, 'mediaElement.seeking (to seekTo)');
                  });

                  test.waitForExpectedEvents(function()
                  {
                      assert_greater_than_equal(mediaElement.currentTime, seekTo, 'Playback time has reached seekTo');
                      assert_false(mediaElement.seeking, 'mediaElement.seeking after seeked to seekTo');

                      assert_false(sourceBuffer.updating, 'sourceBuffer.updating');

                      sourceBuffer.remove(truncatedDuration, Infinity);

                      assert_true(sourceBuffer.updating, 'sourceBuffer.updating');
                      test.expectEvent(sourceBuffer, 'updatestart', 'sourceBuffer');
                      test.expectEvent(sourceBuffer, 'update', 'sourceBuffer');
                      test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
                  });

                  test.waitForExpectedEvents(function()
                  {
                      assert_greater_than_equal(mediaElement.currentTime, seekTo, 'Playback time has reached seekTo');
                      assert_false(sourceBuffer.updating, 'sourceBuffer.updating');

                      // Remove will not remove partial frames, so the resulting duration is the highest end time
                      // of the track buffer ranges, and is greater than or equal to the highest coded frame
                      // presentation time across all track buffer ranges. We first obtain the intersected track buffer
                      // ranges end time and set the duration to that value.
                      truncatedDuration = sourceBuffer.buffered.end(sourceBuffer.buffered.length-1);
                      assert_less_than(truncatedDuration, seekTo,
                                       'remove has removed the current playback position from at least one track buffer');

                      mediaSource.duration = truncatedDuration;
                      test.expectEvent(mediaElement, 'seeking', 'Seeking to truncated duration');

                      // The actual duration may be slightly higher than truncatedDuration because the
                      // duration is adjusted upwards if necessary to be the highest end time across all track buffer
                      // ranges. Allow that increase here.
                      assert_less_than_equal(truncatedDuration, mediaSource.duration,
                                              'Duration should not be less than what was set');
                      // Here, we assume no test media coded frame duration is longer than 100ms.
                      assert_less_than(mediaSource.duration - truncatedDuration, 0.1);

                      // Update our truncatedDuration to be the actual new duration.
                      truncatedDuration = mediaSource.duration;

                      assert_true(mediaElement.seeking, 'Seeking after setting truncatedDuration');
                  });

                  test.waitForExpectedEvents(function()
                  {
                      assert_equals(mediaElement.currentTime, truncatedDuration,
                                    'Playback time is truncatedDuration while seeking');
                      assert_true(mediaElement.seeking, 'mediaElement.seeking while seeking to truncatedDuration');
                      assert_equals(mediaElement.duration, truncatedDuration,
                                    'mediaElement truncatedDuration during seek to it');
                      assert_equals(mediaSource.duration, truncatedDuration,
                                    'mediaSource truncatedDuration during seek to it');

                      testFunction(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData,
                                   truncatedDuration);
                  });
              }, description, options);
          }

          mediasource_truncated_duration_seek_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer,
                                                            mediaData, truncatedDuration)
          {
              // Tests that duration truncation below current playback position
              // starts seek to new duration.
              test.done();
          }, 'Test seek starts on duration truncation below currentTime');

          mediasource_truncated_duration_seek_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer,
                                                            mediaData, truncatedDuration)
          {
              // The duration has been truncated at this point, and there is an
              // outstanding seek pending.
              test.expectEvent(sourceBuffer, 'updateend', 'updateend after appending more data');

              test.expectEvent(mediaElement, 'timeupdate', 'timeupdate while finishing seek to truncatedDuration');
              test.expectEvent(mediaElement, 'seeked', 'seeked to truncatedDuration');

              // Allow seek to complete by appending more data beginning at the
              // truncated duration timestamp.
              sourceBuffer.timestampOffset = truncatedDuration;
              sourceBuffer.appendBuffer(mediaData);

              test.waitForExpectedEvents(function()
              {
                  assert_greater_than_equal(mediaElement.currentTime, truncatedDuration,
                                            'Playback time has reached truncatedDuration');
                  assert_approx_equals(mediaElement.duration, truncatedDuration + segmentInfo.duration, 0.05,
                                       'mediaElement duration increased by new append');
                  assert_equals(mediaSource.duration, mediaElement.duration,
                                'mediaSource duration increased by new append');
                  assert_false(mediaElement.seeking, 'mediaElement.seeking after seeked to truncatedDuration');

                  test.done();
              });
          }, 'Test appendBuffer completes previous seek to truncated duration');

          mediasource_truncated_duration_seek_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer,
                                                            mediaData, truncatedDuration)
          {
              // The duration has been truncated at this point, and there is an
              // outstanding seek pending.
              test.expectEvent(mediaSource, 'sourceended', 'endOfStream acknowledged');

              test.expectEvent(mediaElement, 'timeupdate', 'timeupdate while finishing seek to truncatedDuration');
              test.expectEvent(mediaElement, 'seeked', 'seeked to truncatedDuration');

              // Call endOfStream() to complete the pending seek.
              mediaSource.endOfStream();

              test.waitForExpectedEvents(function()
              {
                  assert_greater_than_equal(mediaElement.currentTime, truncatedDuration,
                                'Playback time has reached truncatedDuration');
                  // The mediaSource.readyState is "ended". Buffered ranges have been adjusted to the longest track.
                  truncatedDuration = sourceBuffer.buffered.end(sourceBuffer.buffered.length-1);
                  assert_equals(mediaElement.duration, truncatedDuration,
                                'mediaElement truncatedDuration after seek to it');
                  assert_equals(mediaSource.duration, truncatedDuration,
                                'mediaSource truncatedDuration after seek to it');
                  assert_false(mediaElement.seeking, 'mediaElement.seeking after seeked to truncatedDuration');

                  test.done();
              });
          }, 'Test endOfStream completes previous seek to truncated duration');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              assert_greater_than(segmentInfo.duration, 2, 'Sufficient test media duration');

              var fullDuration = segmentInfo.duration;
              var newDuration = 0.5;

              var expectedDurationChangeEventCount = 1;
              var durationchangeEventCounter = 0;
              var durationchangeEventHandler = test.step_func(function(event)
              {
                  assert_equals(mediaElement.duration, mediaSource.duration, 'mediaElement newDuration');
                  // Final duration may be greater than originally set as per MSE's 2.4.6 Duration change
                  // Adjust newDuration accordingly.
                  assert_less_than_equal(newDuration, mediaSource.duration, 'mediaSource newDuration');
                  durationchangeEventCounter++;
              });

              mediaElement.play();

              // Append all the segments
              test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
              test.expectEvent(mediaElement, 'playing', 'Playing triggered');
              sourceBuffer.appendBuffer(mediaData);

              test.waitForExpectedEvents(function()
              {
                  assert_less_than(mediaElement.currentTime, newDuration / 2, 'mediaElement currentTime');

                  assert_false(sourceBuffer.updating, "updating");

                  // Truncate duration. This should result in one 'durationchange' fired.
                  sourceBuffer.remove(newDuration, Infinity);

                  assert_true(sourceBuffer.updating, "updating");
                  test.expectEvent(sourceBuffer, 'updatestart', 'sourceBuffer');
                  test.expectEvent(sourceBuffer, 'update', 'sourceBuffer');
                  test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
              });

              test.waitForExpectedEvents(function()
              {
                  // Media load also fires 'durationchange' event, so only start counting them now.
                  mediaElement.addEventListener('durationchange', durationchangeEventHandler);

                  assert_false(sourceBuffer.updating, "updating");

                  // Truncate duration. This should result in one 'durationchange' fired.
                  mediaSource.duration = newDuration;

                  // Final duration may be greater than originally set as per MSE's 2.4.6 Duration change
                  // Adjust newDuration accordingly.
                  assert_true(newDuration <= mediaSource.duration, 'adjusted duration');
                  newDuration = mediaSource.duration;

                  // Set duration again to make sure it does not trigger another 'durationchange' event.
                  mediaSource.duration = newDuration;

                  // Mark endOfStream so that playback can reach 'ended' at the new duration.
                  test.expectEvent(mediaSource, 'sourceended', 'endOfStream acknowledged');
                  mediaSource.endOfStream();

                  // endOfStream can change duration slightly.
                  // Allow for one more 'durationchange' event only in this case.
                  var currentDuration = mediaSource.duration;
                  if (currentDuration != newDuration) {
                      newDuration = currentDuration;
                      ++expectedDurationChangeEventCount;
                  }

                  // Allow media to play to end while counting 'durationchange' events.
                  test.expectEvent(mediaElement, 'ended', 'Playback ended');
                  test.waitForExpectedEvents(function()
                  {
                      mediaElement.removeEventListener('durationchange', durationchangeEventHandler);
                      assert_equals(durationchangeEventCounter, expectedDurationChangeEventCount, 'durationchanges');
                      test.done();
                  });
              });
          }, 'Test setting same duration multiple times does not fire duplicate durationchange');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              assert_greater_than(segmentInfo.duration, 2, 'Sufficient test media duration');

              var fullDuration = segmentInfo.duration;
              var newDuration = fullDuration / 2;

              // Append all the segments
              test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
              test.expectEvent(mediaElement, 'loadedmetadata', 'mediaElement');
              sourceBuffer.appendBuffer(mediaData);

              test.waitForExpectedEvents(function()
              {
                  assert_false(sourceBuffer.updating, "updating");

                  assert_throws("InvalidStateError", function()
                  {
                      mediaSource.duration = newDuration;
                  }, "duration");

                  test.done();
              });
          }, 'Test setting the duration to less than the highest starting presentation timestamp will throw');

          mediasource_test(function(test, mediaElement, mediaSource)
          {
              mediaElement.addEventListener("error", test.unreached_func("Unexpected event 'error'"));
              MediaSourceUtil.fetchManifestAndData(test, manifestFilenameAudio, function(typeAudio, dataAudio)
              {
                  MediaSourceUtil.fetchManifestAndData(test, manifestFilenameVideo, function(typeVideo, dataVideo)
                  {
                      var sourceBufferAudio = mediaSource.addSourceBuffer(typeAudio);
                      var sourceBufferVideo = mediaSource.addSourceBuffer(typeVideo);
                      var newDuration = 1.2;

                      sourceBufferAudio.appendWindowEnd = 2.0;
                      sourceBufferAudio.appendWindowStart = newDuration / 2.0;
                      sourceBufferAudio.appendBuffer(dataAudio);

                      sourceBufferVideo.appendWindowEnd = 2.0;
                      sourceBufferVideo.appendWindowStart = newDuration * 1.3;
                      sourceBufferVideo.appendBuffer(dataVideo);

                      test.expectEvent(sourceBufferAudio, "updateend");
                      test.expectEvent(sourceBufferVideo, "updateend");
                      test.waitForExpectedEvents(function()
                      {
                          assert_equals(sourceBufferAudio.buffered.length, 1);
                          assert_equals(sourceBufferVideo.buffered.length, 1);
                          assert_less_than(sourceBufferAudio.buffered.start(0), newDuration);
                          assert_greater_than(sourceBufferVideo.buffered.start(0), newDuration);
                          assert_throws("InvalidStateError", function () { mediaSource.duration = newDuration; });
                          test.done();
                      });
                  });
              });
          }, "Truncating the duration throws an InvalidStateError exception when new duration is less than the highest buffered range start time of one of the track buffers");

          mediasource_test(function(test, mediaElement, mediaSource)
          {
              mediaElement.addEventListener("error", test.unreached_func("Unexpected event 'error'"));
              MediaSourceUtil.fetchManifestAndData(test, manifestFilenameAudio, function(typeAudio, dataAudio)
              {
                  MediaSourceUtil.fetchManifestAndData(test, manifestFilenameVideo, function(typeVideo, dataVideo)
                  {
                      var sourceBufferAudio = mediaSource.addSourceBuffer(typeAudio);
                      var sourceBufferVideo = mediaSource.addSourceBuffer(typeVideo);

                      // Buffer audio [0.8,1.8)
                      sourceBufferAudio.timestampOffset = 0.8;
                      sourceBufferAudio.appendWindowEnd = 1.8;
                      sourceBufferAudio.appendBuffer(dataAudio);

                      // Buffer video [1.5,3)
                      sourceBufferVideo.timestampOffset = 1.5;
                      sourceBufferVideo.appendWindowEnd = 3;
                      sourceBufferVideo.appendBuffer(dataVideo);

                      test.expectEvent(sourceBufferAudio, "updateend");
                      test.expectEvent(sourceBufferVideo, "updateend");
                      test.waitForExpectedEvents(function()
                      {
                          var newDuration = 2.0;

                          // Verify the test setup
                          assert_equals(sourceBufferAudio.buffered.length, 1);
                          assert_equals(sourceBufferVideo.buffered.length, 1);
                          assert_greater_than(sourceBufferAudio.buffered.end(0), 1.5);
                          assert_less_than(sourceBufferAudio.buffered.end(0), newDuration);
                          assert_less_than(sourceBufferVideo.buffered.start(0), newDuration);
                          assert_greater_than(sourceBufferVideo.buffered.end(0), newDuration + 0.5);

                          // Verify the expected error
                          // We assume relocated test video has at least one coded
                          // frame presentation interval which fits in [>2.0,>2.5)
                          assert_throws("InvalidStateError", function () { mediaSource.duration = newDuration; });
                          test.done();
                      });
                  });
              });
          }, "Truncating the duration throws an InvalidStateError exception when new duration is less than a buffered coded frame presentation time");

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              assert_less_than(segmentInfo.duration, 60, 'Sufficient test media duration');
              sourceBuffer.appendBuffer(mediaData);
              test.expectEvent(sourceBuffer, 'updateend', 'Media data appended to the SourceBuffer');
              test.waitForExpectedEvents(function()
              {
                  mediaSource.duration = 60;
                  assert_false(sourceBuffer.updating, 'No SourceBuffer update when duration is increased');
                  test.done();
              });
          }, 'Increasing the duration does not trigger any SourceBuffer update');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              assert_greater_than(segmentInfo.duration, 2, 'Sufficient test media duration');
              mediaElement.play();
              sourceBuffer.appendBuffer(mediaData);
              test.expectEvent(sourceBuffer, 'updateend', 'Media data appended to the SourceBuffer');
              test.waitForExpectedEvents(function()
              {
                  mediaSource.duration = 60;
                  assert_false(sourceBuffer.updating, 'No SourceBuffer update when duration is increased');
                  test.done();
              });
          }, 'Increasing the duration during media playback does not trigger any SourceBuffer update');
        </script>
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