var PlaybackperfTest = function()

in 2019/media/playbackperfTest.js [24:283]
76 lines of code
9 McCabe index (conditional complexity)

var PlaybackperfTest = function() {

var webkitPrefix = MediaSource.prototype.version.indexOf('webkit') >= 0;
var tests = [];
TestBase.timeout = 70000; // 70 sec to compensate for 0.25 playbackRate tests.
var info = 'No MSE Support!';
if (window.MediaSource) {
  info = 'webkit prefix: ' + webkitPrefix.toString();
}
info += ' | Default Timeout: ' + TestBase.timeout + 'ms';

var fields = ['passes', 'failures', 'timeouts'];

var createPerfTest = function(name, category, mandatory) {
  var t = createTest(name);
  t.prototype.index = tests.length;
  t.prototype.passes = 0;
  t.prototype.failures = 0;
  t.prototype.timeouts = 0;
  t.prototype.category = category || 'Playback Performance';
  if (typeof mandatory === 'boolean') {
    t.prototype.mandatory = mandatory;
  }
  tests.push(t);
  return t;
};

/**
 * Creates a TotalVideoFrames test that validates whether the totalVideoFrames
 * reported from VideoPlaybackQuality is correct by comparing it against the
 * total frames in the video file.
 */
var createTotalVideoFramesValidationTest = function(videoStream, frames) {
  var test = createPerfTest('TotalVideoFrames', 'Media Playback Quality');
  test.prototype.title = 'TotalVideoFrames Validation';
  test.prototype.start = function(runner, video) {
    var ms = new MediaSource();
    var audioStream = Media.AAC.Audio1MB;
    var videoSb;
    var audioSb;
    var totalDecodedFrames = 0;
    var videoPerfMetrics = new VideoPerformanceMetrics(video);
    if (!videoPerfMetrics.supportsVideoPerformanceMetrics()) {
      runner.fail('UserAgent needs to support ' +
                  '\'video.getVideoPlaybackQuality\' or the combined ' +
                  '\'video.webkitDecodedFrameCount\'' +
                  'and video.webkitDroppedFrameCount to execute this test.');
    }
    ms.addEventListener('sourceopen', function() {
      videoSb = ms.addSourceBuffer(videoStream.mimetype);
      audioSb = ms.addSourceBuffer(audioStream.mimetype);
    });
    video.src = window.URL.createObjectURL(ms);

    var videoXhr = runner.XHRManager.createRequest(
        videoStream.src, function(e) {
      videoSb.appendBuffer(this.getResponseData());
      videoSb.addEventListener('updateend', function() {
        ms.endOfStream();
        video.addEventListener('ended', function() {
          runner.checkEq(
              totalDecodedFrames, frames, 'playbackQuality.totalVideoFrames');
          runner.succeed();
        });
      });
      video.addEventListener('timeupdate', function(e) {
          totalDecodedFrames = videoPerfMetrics.getTotalDecodedVideoFrames();
          test.prototype.status = '(' + totalDecodedFrames + ')';
          runner.updateStatus();
      });
      video.play();
    });
    var audioXhr = runner.XHRManager.createRequest(
        audioStream.src, function(e) {
      audioSb.appendBuffer(this.getResponseData());
      videoXhr.send();
    }, 0, 131100); // audio is longer than video.
    audioXhr.send();
  };
};

createTotalVideoFramesValidationTest(Media.H264.Video1MB, 25);

/**
 * Ensure that browser is able to detect frame drops by correctly implementing
 * the DroppedFrameCount API.
 */
var createFrameDropValidationTest = function(videoStream1, videoStream2) {
  var test = createPerfTest('FrameDrop', 'Media Playback Quality');
  test.prototype.title = 'Frame Drop Validation';
  test.prototype.start = function(runner, video) {
    var videoPerfMetrics = new VideoPerformanceMetrics(video);
    if (!videoPerfMetrics.supportsVideoPerformanceMetrics()) {
      runner.fail('UserAgent needs to support ' +
          '\'video.getVideoPlaybackQuality\' or the combined ' +
          '\'video.webkitDecodedFrameCount\'' +
          'and video.webkitDroppedFrameCount to execute this test.');
    }
    var playVideo = function(videoStream) {
      setupMse(video, runner, videoStream, Media.AAC.AudioNormal);
      video.playbackRate = 2.0;
      video.addEventListener('timeupdate', function onTimeUpdate(e) {
        var totalDroppedFrames = videoPerfMetrics.getDroppedVideoFrames();
        var totalDecodedFrames = videoPerfMetrics.getTotalDecodedVideoFrames();
        test.prototype.status = '(' + totalDroppedFrames + '/' +
            totalDecodedFrames + ')';
        runner.updateStatus();
        if (!video.paused && video.currentTime >= 15) {
          video.removeEventListener('timeupdate', onTimeUpdate);
          video.pause();
          if (totalDecodedFrames <= 0) {
            test.prototype.status = 'Fail';
            runner.fail('UserAgent was unable to render any frames.');
          }
          if (totalDroppedFrames > 2) {
            runner.succeed();
          } else if (videoStream2.src == videoStream.src) {
            runner.fail('UserAgent produced ' + totalDroppedFrames +
                ' dropped frames.');
          } else {
            playVideo(videoStream2);
          }
        }
      });
      video.play();
    };
    playVideo(videoStream1);
  };
};

createFrameDropValidationTest(
    Media.H264.Webgl1080p60fps, Media.VP9.Webgl2160p60fps);

/**
 * Ensure no dropped frame is encountered during playback of specified media
 * format in certain playback rate.
 */
var createPlaybackPerfTest = function(
    videoStream, playbackRate, category, mandatory) {
  // H264 tests that are greater than 1080p are optional
  var isOptionalPlayBackPerfStream = function(videoStream) {
    return videoStream.codec == 'H264' &&
        (util.compareResolutions(videoStream.get('resolution'), '1080p') > 0);
  };

  mandatory = (typeof mandatory != 'undefined') ?
    mandatory :
    !isOptionalPlayBackPerfStream(videoStream);

  var test = createPerfTest('PlaybackPerf' + '.' + videoStream.codec +
      '.' + videoStream.get('resolution') + videoStream.get('fps') + '@' +
      playbackRate + 'X', category, mandatory);
  test.prototype.title = 'Playback performance test';
  test.prototype.start = function(runner, video) {
    var videoPerfMetrics = new VideoPerformanceMetrics(video);
    if (!videoPerfMetrics.supportsVideoPerformanceMetrics()) {
      runner.fail('UserAgent needs to support ' +
          '\'video.getVideoPlaybackQuality\' or the combined ' +
          '\'video.webkitDecodedFrameCount\'' +
          'and video.webkitDroppedFrameCount to execute this test.');
    }
    setupMse(video, runner, videoStream, Media.AAC.AudioNormal);
    video.playbackRate = playbackRate;
    video.addEventListener('timeupdate', function onTimeUpdate(e) {
      var totalDroppedFrames = videoPerfMetrics.getDroppedVideoFrames();
      var totalDecodedFrames = videoPerfMetrics.getTotalDecodedVideoFrames();
      test.prototype.status = '(' + totalDroppedFrames + '/' +
          totalDecodedFrames + ')';
      runner.updateStatus();
      if (!video.paused && video.currentTime >= 15) {
        video.removeEventListener('timeupdate', onTimeUpdate);
        video.pause();
        if (totalDecodedFrames <= 0) {
          test.prototype.status = 'Fail';
          runner.fail('UserAgent was unable to render any frames.');
        }
        runner.checkLE(totalDroppedFrames, 1, 'Total dropped frames');
        runner.succeed();
      }
    });
    video.play();
  };
};

var mediaFormats = [Media.VP9.Webgl144p30fps, Media.VP9.Webgl240p30fps,
                    Media.VP9.Webgl360p30fps, Media.VP9.Webgl480p30fps,
                    Media.VP9.Webgl720p30fps, Media.VP9.Webgl1080p30fps,
                    Media.VP9.Webgl1440p30fps, Media.VP9.Webgl2160p30fps,
                    Media.H264.Webgl144p15fps, Media.H264.Webgl240p30fps,
                    Media.H264.Webgl360p30fps, Media.H264.Webgl480p30fps,
                    Media.H264.Webgl720p30fps, Media.H264.Webgl1080p30fps,
                    Media.H264.Webgl1440p30fps, Media.H264.Webgl2160p30fps];

var mediaFormatsHfr = [Media.VP9.Webgl720p60fps, Media.VP9.Webgl1080p60fps,
                       Media.VP9.Webgl1440p60fps, Media.VP9.Webgl2160p60fps,
                       Media.H264.Webgl720p60fps, Media.H264.Webgl1080p60fps];

var allMediaFormats = mediaFormats.concat(mediaFormatsHfr);

for (var formatIdx in allMediaFormats) {
  createPlaybackPerfTest(
      allMediaFormats[formatIdx], 1.0, 'Playback Performance');
}

createPlaybackPerfTest(
    Media.VP9.Webgl720p60fps, 0.25, 'Playback Rate Performance');
createPlaybackPerfTest(
    Media.VP9.Webgl2160p60fps, 0.25, 'Playback Rate Performance');
createPlaybackPerfTest(
    Media.H264.Webgl720p30fps, 0.25, 'Playback Rate Performance');
createPlaybackPerfTest(
    Media.H264.Webgl2160p30fps, 0.25, 'Playback Rate Performance');

createPlaybackPerfTest(
    Media.VP9.Webgl720p60fps, 0.5, 'Playback Rate Performance');
createPlaybackPerfTest(
    Media.VP9.Webgl2160p60fps, 0.5, 'Playback Rate Performance');
createPlaybackPerfTest(
    Media.H264.Webgl720p30fps, 0.5, 'Playback Rate Performance');
createPlaybackPerfTest(
    Media.H264.Webgl2160p30fps, 0.5, 'Playback Rate Performance');

for (var formatIdx in mediaFormats) {
  createPlaybackPerfTest(
      mediaFormats[formatIdx], 1.25, 'Playback Rate Performance');
}

for (var formatIdx in mediaFormats) {
  createPlaybackPerfTest(
      mediaFormats[formatIdx], 1.5, 'Playback Rate Performance');
}

for (var formatIdx in mediaFormats) {
  createPlaybackPerfTest(
      mediaFormats[formatIdx], 2.0, 'Playback Rate Performance');
}

for (var formatIdx in mediaFormatsHfr) {
  createPlaybackPerfTest(
      mediaFormatsHfr[formatIdx], 1.25, 'HFR Playback Rate Performance', false);
}

for (var formatIdx in mediaFormatsHfr) {
  createPlaybackPerfTest(
      mediaFormatsHfr[formatIdx], 1.5, 'HFR Playback Rate Performance', false);
}

for (var formatIdx in mediaFormatsHfr) {
  createPlaybackPerfTest(
      mediaFormatsHfr[formatIdx], 2.0, 'HFR Playback Rate Performance', false);
}

return {
  tests: tests,
  info: info,
  fields: fields,
  viewType: 'expanded-test-status'
};

};