Merge branch 'master' into development

@@ -16,3 +16,10 @@ notifications:
 before_script:
 before_script:
   - export DISPLAY=:99.0
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
   - sh -e /etc/init.d/xvfb start
+env:
+  global:
+  - secure: dM7svnHPPu5IiUMeFWW5zg+iuWNpwt6SSDi3MmVvhSclNMRLesQoRB+7Qq5J/LiKhmjpv1/GlNVV0CTsHMRhZNwQ3fo38eEuTXv99aAflEITXwSEh/VntKViHbGFubn06EnVkJoH6MX3zJ6kbiwc2QdSQbywKzS6l6quUEpWpd0=
+  - secure: AnduYGXka5ft1x7V3SuVYqvlKLvJGhUaRNFdy4UDJr3ZVuwpQjE4TMDG8REmJIJvXfHbh4qY4N1cFSGnXkZ4bH21Xk0v9DLhsxbarKz+X2BvPgXs+Af9EQ6vLEy/5S1vMLxfT5+y+Ec5bVNGOsdUZby8Y21CRzSg6ADN9kwPGlE=
+addons:
+  sauce_connect: true
+  firefox: latest

 {
 {
   "name": "videojs-contrib-hls",
   "name": "videojs-contrib-hls",
-  "version": "1.3.5",
+  "version": "1.3.9",
   "description": "Play back HLS with video.js, even where it's not natively supported",
   "description": "Play back HLS with video.js, even where it's not natively supported",
   "main": "es5/videojs-contrib-hls.js",
   "main": "es5/videojs-contrib-hls.js",
   "engines": {
   "engines": {

@@ -3,6 +3,16 @@
  */
  */
 import {createTimeRange} from 'video.js';
 import {createTimeRange} from 'video.js';
 
 
+let Playlist = {
+  /**
+   * The number of segments that are unsafe to start playback at in
+   * a live stream. Changing this value can cause playback stalls.
+   * See HTTP Live Streaming, "Playing the Media Playlist File"
+   * https://tools.ietf.org/html/draft-pantos-http-live-streaming-18#section-6.3.3
+   */
+  UNSAFE_LIVE_SEGMENTS: 3
+};
+
 const backwardDuration = function(playlist, endSequence) {
 const backwardDuration = function(playlist, endSequence) {
   let result = 0;
   let result = 0;
   let i = endSequence - playlist.mediaSequence;
   let i = endSequence - playlist.mediaSequence;
@@ -187,12 +197,12 @@ export const seekable = function(playlist) {
   start = intervalDuration(playlist, playlist.mediaSequence);
   start = intervalDuration(playlist, playlist.mediaSequence);
   end = intervalDuration(playlist,
   end = intervalDuration(playlist,
                          playlist.mediaSequence +
                          playlist.mediaSequence +
-                         Math.max(0, playlist.segments.length - 3));
+                         Math.max(0, playlist.segments.length - Playlist.UNSAFE_LIVE_SEGMENTS));
   return createTimeRange(start, end);
   return createTimeRange(start, end);
 };
 };
 
 
+Playlist.duration = duration;
+Playlist.seekable = seekable;
+
 // exports
 // exports
-export default {
-  duration,
-  seekable
-};
+export default Playlist;

@@ -197,6 +197,88 @@ const keyFailed = function(key) {
   return key.retries && key.retries >= 2;
   return key.retries && key.retries >= 2;
 };
 };
 
 
+/**
+ * Returns the CSS value for the specified property on an element
+ * using `getComputedStyle`. Firefox has a long-standing issue where
+ * getComputedStyle() may return null when running in an iframe with
+ * `display: none`.
+ * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397
+ */
+const safeGetComputedStyle = function(el, property) {
+  let result;
+
+  if (!el) {
+    return '';
+  }
+
+  result = getComputedStyle(el);
+  if (!result) {
+    return '';
+  }
+
+  return result[property];
+};
+
+/**
+ * Updates segment with information about its end-point in time and, optionally,
+ * the segment duration if we have enough information to determine a segment duration
+ * accurately.
+ * @param playlist {object} a media playlist object
+ * @param segmentIndex {number} the index of segment we last appended
+ * @param segmentEnd {number} the known of the segment referenced by segmentIndex
+ */
+const updateSegmentMetadata = function(playlist, segmentIndex, segmentEnd) {
+  if (!playlist) {
+    return;
+  }
+
+  let segment = playlist.segments[segmentIndex];
+  let previousSegment = playlist.segments[segmentIndex - 1];
+
+  if (segmentEnd && segment) {
+    segment.end = segmentEnd;
+
+    // fix up segment durations based on segment end data
+    if (!previousSegment) {
+      // first segment is always has a start time of 0 making its duration
+      // equal to the segment end
+      segment.duration = segment.end;
+    } else if (previousSegment.end) {
+      segment.duration = segment.end - previousSegment.end;
+    }
+  }
+};
+
+/**
+ * Determines if we should call endOfStream on the media source based on the state
+ * of the buffer or if appened segment was the final segment in the playlist.
+ * @param playlist {object} a media playlist object
+ * @param mediaSource {object} the MediaSource object
+ * @param segmentIndex {number} the index of segment we last appended
+ * @param currentBuffered {object} the buffered region that currentTime resides in
+ * @return {boolean} whether the calling function should call endOfStream on the MediaSource
+ */
+const detectEndOfStream = function(playlist, mediaSource, segmentIndex, currentBuffered) {
+  if (!playlist) {
+    return false;
+  }
+
+  let segments = playlist.segments;
+
+  // determine a few boolean values to help make the branch below easier
+  // to read
+  let appendedLastSegment = (segmentIndex === segments.length - 1);
+  let bufferedToEnd = (currentBuffered.length &&
+    segments[segments.length - 1].end <= currentBuffered.end(0));
+
+  // if we've buffered to the end of the video, we need to call endOfStream
+  // so that MediaSources can trigger the `ended` event when it runs out of
+  // buffered data instead of waiting for me
+  return playlist.endList &&
+    mediaSource.readyState === 'open' &&
+    (appendedLastSegment || bufferedToEnd);
+};
+
 const parseCodecs = function(codecs) {
 const parseCodecs = function(codecs) {
   let result = {
   let result = {
     codecCount: 0,
     codecCount: 0,
@@ -592,10 +674,15 @@ export default class HlsHandler extends Component {
   duration() {
   duration() {
     let playlists = this.playlists;
     let playlists = this.playlists;
 
 
-    if (playlists) {
-      return Hls.Playlist.duration(playlists.media());
+    if (!playlists) {
+      return 0;
+    }
+
+    if (this.mediaSource) {
+      return this.mediaSource.duration;
     }
     }
-    return 0;
+
+    return Hls.Playlist.duration(playlists.media());
   }
   }
 
 
   seekable() {
   seekable() {
@@ -635,6 +722,7 @@ export default class HlsHandler extends Component {
   updateDuration(playlist) {
   updateDuration(playlist) {
     let oldDuration = this.mediaSource.duration;
     let oldDuration = this.mediaSource.duration;
     let newDuration = Hls.Playlist.duration(playlist);
     let newDuration = Hls.Playlist.duration(playlist);
+    let buffered = this.tech_.buffered();
     let setDuration = () => {
     let setDuration = () => {
       this.mediaSource.duration = newDuration;
       this.mediaSource.duration = newDuration;
       this.tech_.trigger('durationchange');
       this.tech_.trigger('durationchange');
@@ -642,6 +730,10 @@ export default class HlsHandler extends Component {
       this.mediaSource.removeEventListener('sourceopen', setDuration);
       this.mediaSource.removeEventListener('sourceopen', setDuration);
     };
     };
 
 
+    if (buffered.length > 0) {
+      newDuration = Math.max(newDuration, buffered.end(buffered.length - 1));
+    }
+
     // if the duration has changed, invalidate the cached value
     // if the duration has changed, invalidate the cached value
     if (oldDuration !== newDuration) {
     if (oldDuration !== newDuration) {
       // update the duration
       // update the duration
@@ -767,8 +859,8 @@ export default class HlsHandler extends Component {
     // (this could be the lowest bitrate rendition as  we go through all of them above)
     // (this could be the lowest bitrate rendition as  we go through all of them above)
     variant = null;
     variant = null;
 
 
-    width = parseInt(getComputedStyle(this.tech_.el()).width, 10);
-    height = parseInt(getComputedStyle(this.tech_.el()).height, 10);
+    width = parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10);
+    height = parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10);
 
 
     // iterate through the bandwidth-filtered playlists and find
     // iterate through the bandwidth-filtered playlists and find
     // best rendition by player dimension
     // best rendition by player dimension
@@ -1094,6 +1186,7 @@ export default class HlsHandler extends Component {
     let segment = segmentInfo.playlist.segments[segmentInfo.mediaIndex];
     let segment = segmentInfo.playlist.segments[segmentInfo.mediaIndex];
     let removeToTime = 0;
     let removeToTime = 0;
     let seekable = this.seekable();
     let seekable = this.seekable();
+    let currentTime = this.tech_.currentTime();
 
 
     // Chrome has a hard limit of 150mb of
     // Chrome has a hard limit of 150mb of
     // buffer and a very conservative "garbage collector"
     // buffer and a very conservative "garbage collector"
@@ -1103,10 +1196,10 @@ export default class HlsHandler extends Component {
     if (this.sourceBuffer && !this.sourceBuffer.updating) {
     if (this.sourceBuffer && !this.sourceBuffer.updating) {
       // If we have a seekable range use that as the limit for what can be removed safely
       // If we have a seekable range use that as the limit for what can be removed safely
       // otherwise remove anything older than 1 minute before the current play head
       // otherwise remove anything older than 1 minute before the current play head
-      if (seekable.length && seekable.start(0) > 0) {
+      if (seekable.length && seekable.start(0) > 0 && seekable.start(0) < currentTime) {
         removeToTime = seekable.start(0);
         removeToTime = seekable.start(0);
       } else {
       } else {
-        removeToTime = this.tech_.currentTime() - 60;
+        removeToTime = currentTime - 60;
       }
       }
 
 
       if (removeToTime > 0) {
       if (removeToTime > 0) {
@@ -1260,37 +1353,43 @@ export default class HlsHandler extends Component {
 
 
   updateEndHandler_() {
   updateEndHandler_() {
     let segmentInfo = this.pendingSegment_;
     let segmentInfo = this.pendingSegment_;
-    let segment;
-    let segments;
     let playlist;
     let playlist;
     let currentMediaIndex;
     let currentMediaIndex;
     let currentBuffered;
     let currentBuffered;
     let seekable;
     let seekable;
     let timelineUpdate;
     let timelineUpdate;
-
-    this.pendingSegment_ = null;
+    let isEndOfStream;
 
 
     // stop here if the update errored or was aborted
     // stop here if the update errored or was aborted
     if (!segmentInfo) {
     if (!segmentInfo) {
+      this.pendingSegment_ = null;
+      return;
+    }
+
+    // In Firefox, the updateend event is triggered for both removing from the buffer and
+    // adding to the buffer. To prevent this code from executing on removals, we wait for
+    // segmentInfo to have a filled in buffered value before we continue processing.
+    if (!segmentInfo.buffered) {
       return;
       return;
     }
     }
 
 
-    playlist = this.playlists.media();
-    segments = playlist.segments;
+    this.pendingSegment_ = null;
+
+    playlist = segmentInfo.playlist;
     currentMediaIndex = segmentInfo.mediaIndex +
     currentMediaIndex = segmentInfo.mediaIndex +
       (segmentInfo.mediaSequence - playlist.mediaSequence);
       (segmentInfo.mediaSequence - playlist.mediaSequence);
     currentBuffered = this.findBufferedRange_();
     currentBuffered = this.findBufferedRange_();
+    isEndOfStream = detectEndOfStream(playlist, this.mediaSource, currentMediaIndex, currentBuffered);
 
 
     // if we switched renditions don't try to add segment timeline
     // if we switched renditions don't try to add segment timeline
     // information to the playlist
     // information to the playlist
     if (segmentInfo.playlist.uri !== this.playlists.media().uri) {
     if (segmentInfo.playlist.uri !== this.playlists.media().uri) {
+      if (isEndOfStream) {
+        return this.mediaSource.endOfStream();
+      }
       return this.fillBuffer();
       return this.fillBuffer();
     }
     }
 
 
-    // annotate the segment with any start and end time information
-    // added by the media processing
-    segment = playlist.segments[currentMediaIndex];
-
     // when seeking to the beginning of the seekable range, it's
     // when seeking to the beginning of the seekable range, it's
     // possible that imprecise timing information may cause the seek to
     // possible that imprecise timing information may cause the seek to
     // end up earlier than the start of the range
     // end up earlier than the start of the range
@@ -1313,17 +1412,13 @@ export default class HlsHandler extends Component {
     timelineUpdate = Hls.findSoleUncommonTimeRangesEnd_(segmentInfo.buffered,
     timelineUpdate = Hls.findSoleUncommonTimeRangesEnd_(segmentInfo.buffered,
                                                         this.tech_.buffered());
                                                         this.tech_.buffered());
 
 
-    if (timelineUpdate && segment) {
-      segment.end = timelineUpdate;
-    }
+    // Update segment meta-data (duration and end-point) based on timeline
+    updateSegmentMetadata(playlist, currentMediaIndex, timelineUpdate);
 
 
-    // if we've buffered to the end of the video, let the MediaSource know
-    if (this.playlists.media().endList &&
-        currentBuffered.length &&
-        segments[segments.length - 1].end <= currentBuffered.end(0) &&
-        this.mediaSource.readyState === 'open') {
-      this.mediaSource.endOfStream();
-      return;
+    // If we decide to signal the end of stream, then we can return instead
+    // of trying to fetch more segments
+    if (isEndOfStream) {
+      return this.mediaSource.endOfStream();
     }
     }
 
 
     if (timelineUpdate !== null ||
     if (timelineUpdate !== null ||

@@ -436,7 +436,7 @@ QUnit.test('duration is set when the source opens after the playlist is loaded',
               'set the duration');
               'set the duration');
 });
 });
 
 
-QUnit.test('calls `remove` on sourceBuffer to when loading a live segment', function() {
+QUnit.test('calls `remove` based on seekable when loading a live segment', function() {
   let removes = [];
   let removes = [];
   let seekable = videojs.createTimeRanges([[60, 120]]);
   let seekable = videojs.createTimeRanges([[60, 120]]);
 
 
@@ -487,7 +487,59 @@ QUnit.test('calls `remove` on sourceBuffer to when loading a live segment', func
                   'remove called with the right range');
                   'remove called with the right range');
 });
 });
 
 
-QUnit.test('calls `remove` on sourceBuffer to when loading a vod segment', function() {
+QUnit.test('calls `remove` based on currentTime when loading a live segment ' +
+           'if seekable start is after currentTime', function() {
+  let removes = [];
+  let seekable = videojs.createTimeRanges([[0, 80]]);
+
+  this.player.src({
+    src: 'liveStart30sBefore.m3u8',
+    type: 'application/vnd.apple.mpegurl'
+  });
+  openMediaSource(this.player, this.clock);
+  this.player.tech_.hls.seekable = function() {
+    return seekable;
+  };
+
+  openMediaSource(this.player, this.clock);
+  this.player.tech_.hls.mediaSource.addSourceBuffer = function() {
+    return new (videojs.extend(videojs.EventTarget, {
+      constructor() {},
+      abort() {},
+      buffered: videojs.createTimeRange(),
+      appendBuffer() {},
+      remove(start, end) {
+        removes.push([start, end]);
+      }
+    }))();
+  };
+  this.player.tech_.hls.bandwidth = 20e10;
+  this.player.tech_.triggerReady();
+  standardXHRResponse(this.requests[0]);
+  this.player.tech_.hls.playlists.trigger('loadedmetadata');
+  this.player.tech_.trigger('canplay');
+
+  this.player.tech_.paused = function() {
+    return false;
+  };
+
+  this.player.tech_.readyState = function() {
+    return 1;
+  };
+
+  this.player.tech_.trigger('play');
+  this.clock.tick(1);
+  // Change seekable so that it starts *after* the currentTime which was set
+  // based on the previous seekable range (the end of 80)
+  seekable = videojs.createTimeRanges([[100, 120]]);
+  standardXHRResponse(this.requests[1]);
+
+  QUnit.strictEqual(this.requests[0].url, 'liveStart30sBefore.m3u8', 'master playlist requested');
+  QUnit.equal(removes.length, 1, 'remove called');
+  QUnit.deepEqual(removes[0], [0, 80 - 60], 'remove called with the right range');
+});
+
+QUnit.test('calls `remove` based on currentTime when loading a vod segment', function() {
   let removes = [];
   let removes = [];
 
 
   this.player.src({
   this.player.src({
@@ -2268,6 +2320,81 @@ QUnit.test('tracks segment end times as they are buffered', function() {
   QUnit.equal(this.player.tech_.hls.mediaSource.duration, 10 + 9.5, 'updated duration');
   QUnit.equal(this.player.tech_.hls.mediaSource.duration, 10 + 9.5, 'updated duration');
 });
 });
 
 
+QUnit.test('updates first segment duration as it is buffered', function() {
+  let bufferEnd = 0;
+
+  this.player.src({
+    src: 'media.m3u8',
+    type: 'application/x-mpegURL'
+  });
+  openMediaSource(this.player, this.clock);
+
+  // as new segments are downloaded, the buffer end is updated
+  this.player.tech_.buffered = function() {
+    return videojs.createTimeRange(0, bufferEnd);
+  };
+  this.requests.shift().respond(200, null,
+                                '#EXTM3U\n' +
+                                '#EXTINF:10,\n' +
+                                '0.ts\n' +
+                                '#EXTINF:10,\n' +
+                                '1.ts\n' +
+                                '#EXT-X-ENDLIST\n');
+
+  // 0.ts is shorter than advertised
+  standardXHRResponse(this.requests.shift());
+  QUnit.equal(this.player.tech_.hls.mediaSource.duration, 20, 'original duration is from the m3u8');
+  QUnit.equal(this.player.tech_.hls.playlists.media().segments[0].duration, 10,
+    'segment duration initially based on playlist');
+
+  bufferEnd = 9.5;
+  this.player.tech_.hls.sourceBuffer.trigger('update');
+  this.player.tech_.hls.sourceBuffer.trigger('updateend');
+  QUnit.equal(this.player.tech_.hls.playlists.media().segments[0].duration, 9.5,
+    'updated segment duration');
+});
+
+QUnit.test('updates segment durations as they are buffered', function() {
+  let bufferEnd = 0;
+
+  this.player.src({
+    src: 'media.m3u8',
+    type: 'application/x-mpegURL'
+  });
+  openMediaSource(this.player, this.clock);
+
+  // as new segments are downloaded, the buffer end is updated
+  this.player.tech_.buffered = function() {
+    return videojs.createTimeRange(0, bufferEnd);
+  };
+  this.requests.shift().respond(200, null,
+                                '#EXTM3U\n' +
+                                '#EXTINF:10,\n' +
+                                '0.ts\n' +
+                                '#EXTINF:10,\n' +
+                                '1.ts\n' +
+                                '#EXT-X-ENDLIST\n');
+
+  // 0.ts is shorter than advertised
+  standardXHRResponse(this.requests.shift());
+  QUnit.equal(this.player.tech_.hls.mediaSource.duration, 20, 'original duration is from the m3u8');
+
+  QUnit.equal(this.player.tech_.hls.playlists.media().segments[1].duration, 10,
+    'segment duration initially based on playlist');
+
+  bufferEnd = 9.5;
+  this.player.tech_.hls.sourceBuffer.trigger('update');
+  this.player.tech_.hls.sourceBuffer.trigger('updateend');
+  this.clock.tick(1);
+  standardXHRResponse(this.requests.shift());
+  bufferEnd = 19;
+  this.player.tech_.hls.sourceBuffer.trigger('update');
+  this.player.tech_.hls.sourceBuffer.trigger('updateend');
+
+  QUnit.equal(this.player.tech_.hls.playlists.media().segments[1].duration, 9.5,
+    'updated segment duration');
+});
+
 QUnit.skip('seeking does not fail when targeted between segments', function() {
 QUnit.skip('seeking does not fail when targeted between segments', function() {
   let currentTime;
   let currentTime;
   let segmentUrl;
   let segmentUrl;
@@ -2576,7 +2703,7 @@ QUnit.test('can be disposed before finishing initialization', function() {
   }
   }
 });
 });
 
 
-QUnit.test('calls ended() on the media source at the end of a playlist', function() {
+QUnit.test('calls endOfStream on the media source after appending the last segment', function() {
   let endOfStreams = 0;
   let endOfStreams = 0;
   let buffered = [[]];
   let buffered = [[]];
 
 
@@ -2591,11 +2718,15 @@ QUnit.test('calls ended() on the media source at the end of a playlist', functio
   this.player.tech_.hls.mediaSource.endOfStream = function() {
   this.player.tech_.hls.mediaSource.endOfStream = function() {
     endOfStreams++;
     endOfStreams++;
   };
   };
+  this.player.currentTime(20);
+  this.clock.tick(1);
   // playlist response
   // playlist response
   this.requests.shift().respond(200, null,
   this.requests.shift().respond(200, null,
                                 '#EXTM3U\n' +
                                 '#EXTM3U\n' +
                                 '#EXTINF:10,\n' +
                                 '#EXTINF:10,\n' +
                                 '0.ts\n' +
                                 '0.ts\n' +
+                                '#EXTINF:10,\n' +
+                                '1.ts\n' +
                                 '#EXT-X-ENDLIST\n');
                                 '#EXT-X-ENDLIST\n');
   // segment response
   // segment response
   this.requests[0].response = new ArrayBuffer(17);
   this.requests[0].response = new ArrayBuffer(17);
@@ -2604,7 +2735,52 @@ QUnit.test('calls ended() on the media source at the end of a playlist', functio
 
 
   buffered = [[0, 10]];
   buffered = [[0, 10]];
   this.player.tech_.hls.sourceBuffer.trigger('updateend');
   this.player.tech_.hls.sourceBuffer.trigger('updateend');
-  QUnit.strictEqual(endOfStreams, 1, 'ended media source');
+  QUnit.strictEqual(endOfStreams, 1, 'called endOfStream on the media source');
+});
+
+QUnit.test('calls endOfStream on the media source when the current buffer ends at duration', function() {
+  let endOfStreams = 0;
+  let buffered = [[]];
+
+  this.player.src({
+    src: 'http://example.com/media.m3u8',
+    type: 'application/vnd.apple.mpegurl'
+  });
+  openMediaSource(this.player, this.clock);
+  this.player.tech_.buffered = function() {
+    return videojs.createTimeRanges(buffered);
+  };
+  this.player.tech_.hls.mediaSource.endOfStream = function() {
+    endOfStreams++;
+  };
+  this.player.currentTime(19);
+  this.clock.tick(1);
+  // playlist response
+  this.requests.shift().respond(200, null,
+                                '#EXTM3U\n' +
+                                '#EXTINF:10,\n' +
+                                '0.ts\n' +
+                                '#EXTINF:10,\n' +
+                                '1.ts\n' +
+                                '#EXT-X-ENDLIST\n');
+  // segment response
+  this.requests[0].response = new ArrayBuffer(17);
+  this.requests.shift().respond(200, null, '');
+  QUnit.strictEqual(endOfStreams, 0, 'waits for the buffer update to finish');
+
+  buffered = [[10, 20]];
+  this.player.tech_.hls.sourceBuffer.trigger('updateend');
+
+  this.player.currentTime(5);
+  this.clock.tick(1);
+  // segment response
+  this.requests[0].response = new ArrayBuffer(17);
+  this.requests.shift().respond(200, null, '');
+
+  buffered = [[0, 20]];
+  this.player.tech_.hls.sourceBuffer.trigger('updateend');
+
+  QUnit.strictEqual(endOfStreams, 2, 'called endOfStream on the media source twice');
 });
 });
 
 
 QUnit.test('calling play() at the end of a video replays', function() {
 QUnit.test('calling play() at the end of a video replays', function() {
@@ -3086,6 +3262,68 @@ QUnit.test('does not download segments if preload option set to none', function(
   QUnit.equal(this.requests.length, 0, 'did not download any segments');
   QUnit.equal(this.requests.length, 0, 'did not download any segments');
 });
 });
 
 
+QUnit.test('does not process update end until buffered value has been set', function() {
+  let drainBufferCallCount = 0;
+  let origDrainBuffer;
+
+  this.player.src({
+    src: 'master.m3u8',
+    type: 'application/vnd.apple.mpegurl'
+  });
+
+  openMediaSource(this.player, this.clock);
+  origDrainBuffer = this.player.tech_.hls.drainBuffer;
+  this.player.tech_.hls.drainBuffer = function() {
+    drainBufferCallCount++;
+  };
+
+  // master
+  standardXHRResponse(this.requests.shift());
+  // media
+  standardXHRResponse(this.requests.shift());
+
+  QUnit.equal(drainBufferCallCount, 0, 'drainBuffer not called yet');
+
+  // segment
+  standardXHRResponse(this.requests.shift());
+
+  QUnit.ok(this.player.tech_.hls.pendingSegment_, 'pending segment exists');
+  QUnit.equal(drainBufferCallCount, 1, 'drainBuffer called');
+
+  this.player.tech_.hls.sourceBuffer.trigger('updateend');
+  QUnit.ok(this.player.tech_.hls.pendingSegment_, 'pending segment exists');
+
+  this.player.tech_.hls.drainBuffer = origDrainBuffer;
+  this.player.tech_.hls.drainBuffer();
+  QUnit.ok(this.player.tech_.hls.pendingSegment_, 'pending segment exists');
+
+  this.player.tech_.hls.sourceBuffer.trigger('updateend');
+  QUnit.ok(!this.player.tech_.hls.pendingSegment_, 'pending segment cleared out');
+});
+
+// workaround https://bugzilla.mozilla.org/show_bug.cgi?id=548397
+QUnit.test('selectPlaylist does not fail if getComputedStyle returns null', function() {
+  let oldGetComputedStyle = window.getComputedStyle;
+
+  window.getComputedStyle = function() {
+    return null;
+  };
+
+  this.player.src({
+    src: 'master.m3u8',
+    type: 'application/vnd.apple.mpegurl'
+  });
+  openMediaSource(this.player, this.clock);
+  // master
+  standardXHRResponse(this.requests.shift());
+  // media
+  standardXHRResponse(this.requests.shift());
+
+  this.player.tech_.hls.selectPlaylist();
+  QUnit.ok(true, 'should not throw');
+  window.getComputedStyle = oldGetComputedStyle;
+});
+
 QUnit.module('Buffer Inspection');
 QUnit.module('Buffer Inspection');
 QUnit.test('detects time range end-point changed by updates', function() {
 QUnit.test('detects time range end-point changed by updates', function() {
   let edge;
   let edge;