Integrate playlist loader

Remove old playlist download code and use the playlist loader. Update test cases.

Integrate playlist loader
Remove old playlist download code and use the playlist loader. Update test cases.
David LaPalomento
Showing 4 changed files with 177 additions and 393 deletions
src/playlist-loader.js
src/videojs-hls.js
test/playlist-loader_test.js
test/videojs-hls_test.js
--- a/src/playlist-loader.js
View file @d8cf74c
+++ b/src/playlist-loader.js
View file @d8cf74c
@@ -47,7 +47,7 @@
      return changed ? result : null;
    },
-    PlaylistLoader = function(srcUrl) {
+    PlaylistLoader = function(srcUrl, withCredentials) {
      var
        loader = this,
        media,
@@ -92,6 +92,8 @@
              loader.trigger('mediaupdatetimeout');
            }, refreshDelay);
          }
+          loader.trigger('loadedplaylist');
        };
      PlaylistLoader.prototype.init.call(this);
@@ -122,13 +124,6 @@
        if (loader.state === 'HAVE_NOTHING' || loader.state === 'HAVE_MASTER') {
          throw new Error('Cannot switch media playlist from ' + loader.state);
        }
-        loader.state = 'SWITCHING_MEDIA';
-        // abort any outstanding playlist refreshes
-        if (request) {
-          request.abort();
-          request = null;
-        }
        // find the playlist object if the target playlist has been
        // specified by URI
@@ -139,8 +134,24 @@
          playlist = loader.master.playlists[playlist];
        }
+        if (playlist.uri === media.uri) {
+          // switching to the currently active playlist is a no-op
+          return;
+        }
+        loader.state = 'SWITCHING_MEDIA';
+        // abort any outstanding playlist refreshes
+        if (request) {
+          request.abort();
+          request = null;
+        }
        // request the new playlist
-        request = xhr(resolveUrl(loader.master.uri, playlist.uri), function(error) {
+        request = xhr({
+          url: resolveUrl(loader.master.uri, playlist.uri),
+          withCredentials: withCredentials
+        }, function(error) {
          haveMetadata(error, this, playlist.uri);
        });
      };
@@ -153,21 +164,26 @@
        }
        loader.state = 'HAVE_CURRENT_METADATA';
-        request = xhr(resolveUrl(loader.master.uri, loader.media().uri),
+        request = xhr({
-                      function(error) {
+          url: resolveUrl(loader.master.uri, loader.media().uri),
+          withCredentials: withCredentials
+        }, function(error) {
          haveMetadata(error, this, loader.media().uri);
        });
      });
      // request the specified URL
-      xhr(srcUrl, function(error) {
+      xhr({
+        url: srcUrl,
+        withCredentials: withCredentials
+      }, function(error) {
        var parser, i;
        if (error) {
          loader.error = {
            status: this.status,
            message: 'HLS playlist request error at URL: ' + srcUrl,
-            code: (this.status >= 500) ? 4 : 2
+            code: 2 // MEDIA_ERR_NETWORK
          };
          return loader.trigger('error');
        }
@@ -189,12 +205,15 @@
            loader.master.playlists[loader.master.playlists[i].uri] = loader.master.playlists[i];
          }
-          request = xhr(resolveUrl(srcUrl, parser.manifest.playlists[0].uri),
+          request = xhr({
-                        function(error) {
+            url: resolveUrl(srcUrl, parser.manifest.playlists[0].uri),
+            withCredentials: withCredentials
+          }, function(error) {
            // pass along the URL specified in the master playlist
            haveMetadata(error,
                         this,
                         parser.manifest.playlists[0].uri);
+            loader.trigger('loadedmetadata');
          });
          return loader.trigger('loadedplaylist');
        }
@@ -208,7 +227,8 @@
          }]
        };
        loader.master.playlists[srcUrl] = loader.master.playlists[0];
-        return haveMetadata(null, this, srcUrl);
+        haveMetadata(null, this, srcUrl);
+        return loader.trigger('loadedmetadata');
      });
    };
  PlaylistLoader.prototype = new videojs.hls.Stream();
--- a/src/videojs-hls.js
View file @d8cf74c
+++ b/src/videojs-hls.js
View file @d8cf74c
@@ -194,15 +194,20 @@ var
   */
  translateMediaIndex = function(mediaIndex, original, update) {
    var
-      i = update.segments.length,
+      i,
      originalSegment;
    // no segments have been loaded from the original playlist
    if (mediaIndex === 0) {
      return 0;
    }
+    if (!(update && update.segments)) {
+      // let the media index be zero when there are no segments defined
+      return 0;
+    }
    // try to sync based on URI
+    i = update.segments.length;
    originalSegment = original.segments[mediaIndex - 1];
    while (i--) {
      if (originalSegment.uri === update.segments[i].uri) {
@@ -292,12 +297,9 @@ var
      player = this,
      srcUrl,
-      playlistXhr,
      segmentXhr,
      settings,
-      loadedPlaylist,
      fillBuffer,
-      updateCurrentPlaylist,
      updateDuration;
    // if the video element supports HLS natively, do nothing
@@ -376,7 +378,8 @@ var
    player.on('seeking', function() {
      var currentTime = player.currentTime();
-      player.hls.mediaIndex = getMediaIndexByTime(player.hls.media, currentTime);
+      player.hls.mediaIndex = getMediaIndexByTime(player.hls.playlists.media(),
+                                                  currentTime);
      // abort any segments still being decoded
      player.hls.sourceBuffer.abort();
@@ -407,39 +410,6 @@ var
    };
    /**
-     * Determine whether the current media playlist should be changed
-     * and trigger a switch if necessary. If a sufficiently fresh
-     * version of the target playlist is available, the switch will take
-     * effect immediately. Otherwise, the target playlist will be
-     * refreshed.
-     */
-    updateCurrentPlaylist = function() {
-      var playlist, mediaSequence;
-      playlist = player.hls.selectPlaylist();
-      mediaSequence = player.hls.mediaIndex + (player.hls.media.mediaSequence || 0);
-      if (!playlist.segments ||
-          mediaSequence < (playlist.mediaSequence || 0) ||
-          mediaSequence > (playlist.mediaSequence || 0) + playlist.segments.length) {
-        if (playlistXhr) {
-          playlistXhr.abort();
-        }
-        playlistXhr = xhr({
-          url: resolveUrl(srcUrl, playlist.uri),
-          withCredentials: settings.withCredentials
-        }, loadedPlaylist);
-      } else {
-        player.hls.mediaIndex =
-          translateMediaIndex(player.hls.mediaIndex,
-                              player.hls.media,
-                              playlist);
-        player.hls.media = playlist;
-        updateDuration(player.hls.media);
-      }
-    };
-    /**
     * Chooses the appropriate media playlist based on the current
     * bandwidth estimate and the player size.
     * @return the highest bitrate playlist less than the currently detected
@@ -448,7 +418,7 @@ var
    player.hls.selectPlaylist = function () {
      var
        effectiveBitrate,
-        sortedPlaylists = player.hls.master.playlists.slice(),
+        sortedPlaylists = player.hls.playlists.master.playlists.slice(),
        bandwidthPlaylists = [],
        i = sortedPlaylists.length,
        variant,
@@ -513,97 +483,6 @@ var
    };
    /**
-     * Callback that is invoked when a media playlist finishes
-     * downloading. Triggers `loadedmanifest` once for each playlist
-     * that is downloaded and `loadedmetadata` after at least one
-     * media playlist has been parsed.
-     *
-     * @param error {*} truthy if the request was not successful
-     * @param url {string} a URL to the M3U8 file to process
-     */
-    loadedPlaylist = function(error, url) {
-      var i, parser, playlist, playlistUri, refreshDelay;
-      // clear the current playlist XHR
-      playlistXhr = null;
-      if (error) {
-        player.hls.error = {
-          status: this.status,
-          message: 'HLS playlist request error at URL: ' + url,
-          code: (this.status >= 500) ? 4 : 2
-        };
-        return player.trigger('error');
-      }
-      parser = new videojs.m3u8.Parser();
-      parser.push(this.responseText);
-      // merge this playlist into the master
-      i = player.hls.master.playlists.length;
-      refreshDelay = (parser.manifest.targetDuration || 10) * 1000;
-      while (i--) {
-        playlist = player.hls.master.playlists[i];
-        playlistUri = resolveUrl(srcUrl, playlist.uri);
-        if (playlistUri === url) {
-          // if the playlist is unchanged since the last reload,
-          // try again after half the target duration
-          // http://tools.ietf.org/html/draft-pantos-http-live-streaming-12#section-6.3.4
-          if (playlist.segments &&
-              playlist.segments.length === parser.manifest.segments.length) {
-            refreshDelay /= 2;
-          }
-          player.hls.master.playlists[i] =
-            videojs.util.mergeOptions(playlist, parser.manifest);
-          if (playlist !== player.hls.media) {
-            continue;
-          }
-          // determine the new mediaIndex if we're updating the
-          // current media playlist
-          player.hls.mediaIndex =
-            translateMediaIndex(player.hls.mediaIndex,
-                                playlist,
-                                parser.manifest);
-          player.hls.media = parser.manifest;
-        }
-      }
-      // check the playlist for updates if EXT-X-ENDLIST isn't present
-      if (!parser.manifest.endList) {
-        window.setTimeout(function() {
-          if (!playlistXhr &&
-              resolveUrl(srcUrl, player.hls.media.uri) === url) {
-            playlistXhr = xhr(url, loadedPlaylist);
-          }
-        }, refreshDelay);
-      }
-      // always start playback with the default rendition
-      if (!player.hls.media) {
-        player.hls.media = player.hls.master.playlists[0];
-        // update the duration
-        updateDuration(parser.manifest);
-        // periodicaly check if the buffer needs to be refilled
-        player.on('timeupdate', fillBuffer);
-        player.trigger('loadedmanifest');
-        player.trigger('loadedmetadata');
-        fillBuffer();
-        return;
-      }
-      // select a playlist and download its metadata if necessary
-      updateCurrentPlaylist();
-      player.trigger('loadedmanifest');
-    };
-    /**
     * Determines whether there is enough video data currently in the buffer
     * and downloads a new segment if the buffered time is less than the goal.
     * @param offset (optional) {number} the offset into the downloaded segment
@@ -623,12 +502,12 @@ var
      }
      // if no segments are available, do nothing
-      if (!player.hls.media.segments) {
+      if (!player.hls.playlists.media().segments) {
        return;
      }
      // if the video has finished downloading, stop trying to buffer
-      segment = player.hls.media.segments[player.hls.mediaIndex];
+      segment = player.hls.playlists.media().segments[player.hls.mediaIndex];
      if (!segment) {
        return;
      }
@@ -644,10 +523,10 @@ var
      }
      // resolve the segment URL relative to the playlist
-      if (player.hls.media.uri === srcUrl) {
+      if (player.hls.playlists.media().uri === srcUrl) {
        segmentUri = resolveUrl(srcUrl, segment.uri);
      } else {
-        segmentUri = resolveUrl(resolveUrl(srcUrl, player.hls.media.uri || ''),
+        segmentUri = resolveUrl(resolveUrl(srcUrl, player.hls.playlists.media().uri || ''),
                                segment.uri);
      }
@@ -708,49 +587,55 @@ var
        player.hls.mediaIndex++;
-        if (player.hls.mediaIndex === player.hls.media.segments.length) {
+        if (player.hls.mediaIndex === player.hls.playlists.media().segments.length) {
          mediaSource.endOfStream();
        }
        // figure out what stream the next segment should be downloaded from
        // with the updated bandwidth information
-        updateCurrentPlaylist();
+        player.hls.playlists.media(player.hls.selectPlaylist());
      });
    };
    // load the MediaSource into the player
    mediaSource.addEventListener('sourceopen', function() {
      // construct the video data buffer and set the appropriate MIME type
-      var sourceBuffer = mediaSource.addSourceBuffer('video/flv; codecs="vp6,aac"');
+      var
+        sourceBuffer = mediaSource.addSourceBuffer('video/flv; codecs="vp6,aac"'),
+        oldMediaPlaylist;
      player.hls.sourceBuffer = sourceBuffer;
      sourceBuffer.appendBuffer(segmentParser.getFlvHeader());
      player.hls.mediaIndex = 0;
-      xhr({
+      player.hls.playlists =
-        url: srcUrl,
+        new videojs.hls.PlaylistLoader(srcUrl, settings.withCredentials);
-        withCredentials: settings.withCredentials
+      player.hls.playlists.on('loadedmetadata', function() {
-      }, function(error, url) {
+        oldMediaPlaylist = player.hls.playlists.media();
-        var uri, parser = new videojs.m3u8.Parser();
-        parser.push(this.responseText);
+        // periodicaly check if the buffer needs to be refilled
+        fillBuffer();
-        // master playlists
+        player.on('timeupdate', fillBuffer);
-        if (parser.manifest.playlists) {
-          player.hls.master = parser.manifest;
+        player.trigger('loadedmetadata');
-          playlistXhr = xhr({
+      });
-            url: resolveUrl(url, parser.manifest.playlists[0].uri),
+      player.hls.playlists.on('error', function() {
-            withCredentials: settings.withCredentials
+        player.hls.error = player.hls.playlists.error;
-          }, loadedPlaylist);
+        player.trigger('error');
-          return player.trigger('loadedmanifest');
+      });
-        } else {
+      player.hls.playlists.on('loadedplaylist', function() {
-          // infer a master playlist if a media playlist is loaded directly
+        var updatedPlaylist = player.hls.playlists.media();
-          uri = resolveUrl(window.location.href, url);
-          player.hls.master = {
+        if (!updatedPlaylist) {
-            playlists: [{
+          // do nothing before an initial media playlist has been activated
-              uri: uri
+          return;
-            }]
-          };
-          loadedPlaylist.call(this, error, uri);
        }
+        updateDuration(player.hls.playlists.media());
+        player.hls.mediaIndex = translateMediaIndex(player.hls.mediaIndex,
+                                                    oldMediaPlaylist,
+                                                    updatedPlaylist);
+        oldMediaPlaylist = updatedPlaylist;
      });
    });
    player.src([{
--- a/test/playlist-loader_test.js
View file @d8cf74c
+++ b/test/playlist-loader_test.js
View file @d8cf74c
@@ -65,7 +65,12 @@
  });
  test('jumps to HAVE_METADATA when initialized with a media playlist', function() {
-    var loader = new videojs.hls.PlaylistLoader('media.m3u8');
+    var
+      loadedmetadatas = 0,
+      loader = new videojs.hls.PlaylistLoader('media.m3u8');
+    loader.on('loadedmetadata', function() {
+      loadedmetadatas++;
+    });
    requests.pop().respond(200, null,
                           '#EXTM3U\n' +
                           '#EXTINF:10,\n' +
@@ -75,7 +80,8 @@
    ok(loader.media(), 'sets the media playlist');
    ok(loader.media().uri, 'sets the media playlist URI');
    strictEqual(loader.state, 'HAVE_METADATA', 'the state is correct');
-    strictEqual(0, requests.length, 'no more requests are made');
+    strictEqual(requests.length, 0, 'no more requests are made');
+    strictEqual(loadedmetadatas, 1, 'fired one loadedmetadata');
  });
  test('jumps to HAVE_METADATA when initialized with a live media playlist', function() {
@@ -91,17 +97,22 @@
  test('moves to HAVE_METADATA after loading a media playlist', function() {
    var
-      loadedPlaylist = false,
+      loadedPlaylist = 0,
+      loadedMetadata = 0,
      loader = new videojs.hls.PlaylistLoader('master.m3u8');
    loader.on('loadedplaylist', function() {
-      loadedPlaylist = true;
+      loadedPlaylist++;
+    });
+    loader.on('loadedmetadata', function() {
+      loadedMetadata++;
    });
    requests.pop().respond(200, null,
                           '#EXTM3U\n' +
                           '#EXT-X-STREAM-INF:\n' +
                           'media.m3u8\n' +
                           'alt.m3u8\n');
-    ok(loadedPlaylist, 'loadedplaylist fired');
+    strictEqual(loadedPlaylist, 1, 'fired loadedplaylist once');
+    strictEqual(loadedMetadata, 0, 'did not fire loadedmetadata');
    strictEqual(requests.length, 1, 'requests the media playlist');
    strictEqual(requests[0].method, 'GET', 'GETs the media playlist');
    strictEqual(requests[0].url,
@@ -114,6 +125,8 @@
                           '0.ts\n');
    ok(loader.master, 'sets the master playlist');
    ok(loader.media(), 'sets the media playlist');
+    strictEqual(loadedPlaylist, 2, 'fired loadedplaylist twice');
+    strictEqual(loadedMetadata, 1, 'fired loadedmetadata once');
    strictEqual(loader.state, 'HAVE_METADATA', 'the state is correct');
  });
@@ -317,6 +330,25 @@
    strictEqual(loader.state, 'SWITCHING_MEDIA', 'updated the state');
  });
+  test('switching to the active playlist is a no-op', function() {
+    var loader = new videojs.hls.PlaylistLoader('master.m3u8');
+    requests.pop().respond(200, null,
+                           '#EXTM3U\n' +
+                           '#EXT-X-STREAM-INF:BANDWIDTH=1\n' +
+                           'low.m3u8\n' +
+                           '#EXT-X-STREAM-INF:BANDWIDTH=2\n' +
+                           'high.m3u8\n');
+    requests.pop().respond(200, null,
+                           '#EXTM3U\n' +
+                           '#EXT-X-MEDIA-SEQUENCE:0\n' +
+                           '#EXTINF:10,\n' +
+                           'low-0.ts\n' +
+                           '#EXT-X-ENDLIST\n');
+    loader.media('low.m3u8');
+    strictEqual(requests.length, 0, 'no requests is sent');
+  });
  test('throws an error if a media switch is initiated too early', function() {
    var loader = new videojs.hls.PlaylistLoader('master.m3u8');
--- a/test/videojs-hls_test.js
View file @d8cf74c
+++ b/test/videojs-hls_test.js
View file @d8cf74c
@@ -149,30 +149,25 @@ test('starts playing if autoplay is specified', function() {
  strictEqual(1, plays, 'play was called');
 });
-test('loads the specified manifest URL on init', function() {
+test('creates a PlaylistLoader on init', function() {
-  var loadedmanifest = false, loadedmetadata = false;
+  var loadedmetadata = false;
-  player.on('loadedmanifest', function() {
-    loadedmanifest = true;
-  });
  player.on('loadedmetadata', function() {
    loadedmetadata = true;
  });
  player.hls('manifest/playlist.m3u8');
-  strictEqual(player.hls.readyState(), 0, 'the readyState is HAVE_NOTHING');
+  ok(!player.hls.playlists, 'waits for sourceopen to create the loader');
  videojs.mediaSources[player.currentSrc()].trigger({
    type: 'sourceopen'
  });
  standardXHRResponse(requests[0]);
-  ok(loadedmanifest, 'loadedmanifest fires');
  ok(loadedmetadata, 'loadedmetadata fires');
-  ok(player.hls.master, 'a master is inferred');
+  ok(player.hls.playlists.master, 'set the master playlist');
-  ok(player.hls.media, 'the manifest is available');
+  ok(player.hls.playlists.media(), 'set the media playlist');
-  ok(player.hls.media.segments, 'the segment entries are parsed');
+  ok(player.hls.playlists.media().segments, 'the segment entries are parsed');
-  strictEqual(player.hls.master.playlists[0],
+  strictEqual(player.hls.playlists.master.playlists[0],
-              player.hls.media,
+              player.hls.playlists.media(),
              'the playlist is selected');
-  strictEqual(player.hls.readyState(), 1, 'the readyState is HAVE_METADATA');
 });
 test('sets the duration if one is available on the playlist', function() {
@@ -189,8 +184,9 @@ test('sets the duration if one is available on the playlist', function() {
  });
  standardXHRResponse(requests[0]);
+  strictEqual(calls, 1, 'duration is set');
  standardXHRResponse(requests[1]);
-  strictEqual(calls, 2, 'duration is set');
+  strictEqual(calls, 1, 'duration is set');
 });
 test('calculates the duration if needed', function() {
@@ -207,10 +203,9 @@ test('calculates the duration if needed', function() {
  });
  standardXHRResponse(requests[0]);
-  standardXHRResponse(requests[1]);
+  strictEqual(durations.length, 1, 'duration is set');
-  strictEqual(durations.length, 2, 'duration is set');
  strictEqual(durations[0],
-              player.hls.media.segments.length * 10,
+              player.hls.playlists.media().segments.length * 10,
              'duration is calculated');
 });
@@ -269,18 +264,7 @@ test('re-initializes the plugin for each source', function() {
 });
 test('triggers an error when a master playlist request errors', function() {
-  var
+  var error;
-    status = 0,
-    error;
-  window.XMLHttpRequest = function() {
-    this.open = function() {};
-    this.send = function() {
-      this.readyState = 4;
-      this.status = status;
-      this.onreadystatechange();
-    };
-  };
  player.on('error', function() {
    error = player.hls.error;
  });
@@ -288,6 +272,7 @@ test('triggers an error when a master playlist request errors', function() {
  videojs.mediaSources[player.currentSrc()].trigger({
    type: 'sourceopen'
  });
+  requests.pop().respond(500);
  ok(error, 'an error is triggered');
  strictEqual(2, error.code, 'a network error is triggered');
@@ -355,7 +340,7 @@ test('selects a playlist after segment downloads', function() {
  player.hls('manifest/master.m3u8');
  player.hls.selectPlaylist = function() {
    calls++;
-    return player.hls.master.playlists[0];
+    return player.hls.playlists.master.playlists[0];
  };
  videojs.mediaSources[player.currentSrc()].trigger({
    type: 'sourceopen'
@@ -375,6 +360,7 @@ test('selects a playlist after segment downloads', function() {
  player.trigger('timeupdate');
  standardXHRResponse(requests[3]);
+  console.log(requests.map(function(i) { return i.url; }));
  strictEqual(calls, 2, 'selects after additional segments');
 });
@@ -403,14 +389,14 @@ test('updates the duration after switching playlists', function() {
  player.hls('manifest/master.m3u8');
  player.hls.selectPlaylist = function() {
    selectedPlaylist = true;
-    return player.hls.master.playlists[1];
+    return player.hls.playlists.master.playlists[1];
  };
  player.duration = function(duration) {
    if (duration === undefined) {
      return 0;
    }
    // only track calls that occur after the playlist has been switched
-    if (player.hls.media === player.hls.master.playlists[1]) {
+    if (player.hls.playlists.media() === player.hls.playlists.master.playlists[1]) {
      calls++;
    }
  };
@@ -462,8 +448,10 @@ test('downloads additional playlists if required', function() {
              '/manifest/' +
              playlist.uri,
              'made playlist request');
-  strictEqual(playlist, player.hls.media, 'a new playlists was selected');
+  strictEqual(playlist.uri,
-  ok(player.hls.media.segments, 'segments are now available');
+              player.hls.playlists.media().uri,
+              'a new playlists was selected');
+  ok(player.hls.playlists.media().segments, 'segments are now available');
 });
 test('selects a playlist below the current bandwidth', function() {
@@ -476,15 +464,15 @@ test('selects a playlist below the current bandwidth', function() {
  standardXHRResponse(requests[0]);
  // the default playlist has a really high bitrate
-  player.hls.master.playlists[0].attributes.BANDWIDTH = 9e10;
+  player.hls.playlists.master.playlists[0].attributes.BANDWIDTH = 9e10;
  // playlist 1 has a very low bitrate
-  player.hls.master.playlists[1].attributes.BANDWIDTH = 1;
+  player.hls.playlists.master.playlists[1].attributes.BANDWIDTH = 1;
  // but the detected client bandwidth is really low
  player.hls.bandwidth = 10;
  playlist = player.hls.selectPlaylist();
  strictEqual(playlist,
-              player.hls.master.playlists[1],
+              player.hls.playlists.master.playlists[1],
              'the low bitrate stream is selected');
 });
@@ -498,15 +486,15 @@ test('raises the minimum bitrate for a stream proportionially', function() {
  standardXHRResponse(requests[0]);
  // the default playlist's bandwidth + 10% is equal to the current bandwidth
-  player.hls.master.playlists[0].attributes.BANDWIDTH = 10;
+  player.hls.playlists.master.playlists[0].attributes.BANDWIDTH = 10;
  player.hls.bandwidth = 11;
  // 9.9 * 1.1 < 11
-  player.hls.master.playlists[1].attributes.BANDWIDTH = 9.9;
+  player.hls.playlists.master.playlists[1].attributes.BANDWIDTH = 9.9;
  playlist = player.hls.selectPlaylist();
  strictEqual(playlist,
-              player.hls.master.playlists[1],
+              player.hls.playlists.master.playlists[1],
              'a lower bitrate stream is selected');
 });
@@ -525,7 +513,7 @@ test('uses the lowest bitrate if no other is suitable', function() {
  // playlist 1 has the lowest advertised bitrate
  strictEqual(playlist,
-              player.hls.master.playlists[1],
+              player.hls.playlists.master.playlists[1],
              'the lowest bitrate stream is selected');
 });
@@ -855,30 +843,21 @@ test('clears pending buffer updates when seeking', function() {
 test('playlist 404 should trigger MEDIA_ERR_NETWORK', function() {
  var errorTriggered = false;
-  window.XMLHttpRequest = function() {
-    this.open = function(method, url) {
-      xhrUrls.push(url);
-    };
-    this.send = function() {
-      this.readyState = 4;
-      this.status = 404;
-      this.onreadystatechange();
-    };
-  };
-  player.hls('manifest/media.m3u8');
  player.on('error', function() {
    errorTriggered = true;
  });
+  player.hls('manifest/media.m3u8');
  videojs.mediaSources[player.currentSrc()].trigger({
    type: 'sourceopen'
  });
+  requests.pop().respond(404);
-  equal(true, errorTriggered, 'Missing Playlist error event should trigger');
-  equal(2, player.hls.error.code, 'Player error code should be set to MediaError.MEDIA_ERR_NETWORK');
+  equal(errorTriggered,
+        true,
+        'Missing Playlist error event should trigger');
+  equal(player.hls.error.code,
+        2,
+        'Player error code should be set to MediaError.MEDIA_ERR_NETWORK');
  ok(player.hls.error.message, 'Player error type should inform user correctly');
 });
@@ -916,24 +895,6 @@ test('has no effect if native HLS is available', function() {
     'no media source was opened');
 });
-test('reloads live playlists', function() {
-  var callbacks = [];
-  // capture timeouts
-  window.setTimeout = function(callback, timeout) {
-    callbacks.push({ callback: callback, timeout: timeout });
-  };
-  player.hls('http://example.com/manifest/missingEndlist.m3u8');
-  videojs.mediaSources[player.currentSrc()].trigger({
-    type: 'sourceopen'
-  });
-  standardXHRResponse(requests[0]);
-  strictEqual(1, callbacks.length, 'refresh was scheduled');
-  strictEqual(player.hls.media.targetDuration * 1000,
-              callbacks[0].timeout,
-              'waited one target duration');
-});
 test('duration is Infinity for live playlists', function() {
  player.hls('http://example.com/manifest/missingEndlist.m3u8');
  videojs.mediaSources[player.currentSrc()].trigger({
@@ -959,88 +920,37 @@ test('does not reload playlists with an endlist tag', function() {
  strictEqual(0, callbacks.length, 'no refresh was scheduled');
 });
-test('reloads a live playlist after half a target duration if it has not ' +
+test('updates the media index when a playlist reloads', function() {
-     'changed since the last request', function() {
+  player.hls('http://example.com/live-updating.m3u8');
-  var callbacks = [];
-  // capture timeouts
-  window.setTimeout = function(callback, timeout) {
-    callbacks.push({ callback: callback, timeout: timeout });
-  };
-  player.hls('http://example.com/manifest/missingEndlist.m3u8');
-  videojs.mediaSources[player.currentSrc()].trigger({
-    type: 'sourceopen'
-  });
-  standardXHRResponse(requests[0]);
-  standardXHRResponse(requests[1]);
-  strictEqual(callbacks.length, 1, 'full-length refresh scheduled');
-  callbacks.pop().callback();
-  standardXHRResponse(requests[2]);
-  strictEqual(callbacks.length, 1, 'half-length refresh was scheduled');
-  strictEqual(callbacks[0].timeout,
-              player.hls.media.targetDuration / 2 * 1000,
-              'waited half a target duration');
-});
-test('merges playlist reloads', function() {
-  var oldPlaylist,
-      callback;
-  // capture timeouts
-  window.setTimeout = function(cb) {
-    callback = cb;
-  };
-  player.hls('http://example.com/manifest/missingEndlist.m3u8');
  videojs.mediaSources[player.currentSrc()].trigger({
    type: 'sourceopen'
  });
-  standardXHRResponse(requests[0]);
-  standardXHRResponse(requests[1]);
-  oldPlaylist = player.hls.media;
-  callback();
-  standardXHRResponse(requests[2]);
-  ok(oldPlaylist !== player.hls.media, 'player.hls.media was updated');
-});
-test('updates the media index when a playlist reloads', function() {
+  requests[0].respond(200, null,
-  var callback;
-  window.setTimeout = function(cb) {
-    callback = cb;
-  };
-  // the initial playlist
-  window.manifests['live-updating'] =
                      '#EXTM3U\n' +
                      '#EXTINF:10,\n' +
                      '0.ts\n' +
                      '#EXTINF:10,\n' +
                      '1.ts\n' +
                      '#EXTINF:10,\n' +
-    '2.ts\n';
+                      '2.ts\n');
-  player.hls('http://example.com/live-updating.m3u8');
-  videojs.mediaSources[player.currentSrc()].trigger({
-    type: 'sourceopen'
-  });
-  standardXHRResponse(requests[0]);
  standardXHRResponse(requests[1]);
  // play the stream until 2.ts is playing
  player.hls.mediaIndex = 3;
  // reload the updated playlist
-  window.manifests['live-updating'] =
+  player.hls.playlists.media = function() {
-    '#EXTM3U\n' +
+    return {
-    '#EXTINF:10,\n' +
+      segments: [{
-    '1.ts\n' +
+        uri: '1.ts'
-    '#EXTINF:10,\n' +
+      }, {
-    '2.ts\n' +
+        uri: '2.ts'
-    '#EXTINF:10,\n' +
+      }, {
-    '3.ts\n';
+        uri: '3.ts'
-  callback();
+      }]
-  standardXHRResponse(requests[2]);
+    };
+  };
+  player.hls.playlists.trigger('loadedplaylist');
  strictEqual(player.hls.mediaIndex, 2, 'mediaIndex is updated after the reload');
 });
@@ -1112,64 +1022,6 @@ test('does not reload master playlists', function() {
  strictEqual(callbacks.length, 0, 'no reload scheduled');
 });
-test('only reloads the active media playlist', function() {
-  var callbacks = [],
-      i = 0,
-      filteredRequests = [],
-      customResponse;
-  customResponse = function(request) {
-    request.response = new Uint8Array([1]).buffer;
-    request.respond(200,
-                    {'Content-Type': 'application/vnd.apple.mpegurl'},
-                    '#EXTM3U\n' +
-                    '#EXT-X-MEDIA-SEQUENCE:1\n' +
-                    '#EXTINF:10,\n' +
-                    '1.ts\n');
-  };
-  window.setTimeout = function(callback) {
-    callbacks.push(callback);
-  };
-  player.hls('http://example.com/missingEndlist.m3u8');
-  videojs.mediaSources[player.currentSrc()].trigger({
-    type: 'sourceopen'
-  });
-  standardXHRResponse(requests[0]);
-  standardXHRResponse(requests[1]);
-  videojs.mediaSources[player.currentSrc()].endOfStream = function() {};
-  player.hls.selectPlaylist = function() {
-    return player.hls.master.playlists[1];
-  };
-  player.hls.master.playlists.push({
-    uri: 'http://example.com/switched.m3u8'
-  });
-  player.trigger('timeupdate');
-  strictEqual(callbacks.length, 1, 'a refresh is scheduled');
-  standardXHRResponse(requests[2]); // segment response
-  customResponse(requests[3]); // loaded witched.m3u8
-  callbacks.shift()(); // out-of-date refresh of missingEndlist.m3u8
-  callbacks.shift()(); // refresh switched.m3u8
-  for (; i < requests.length; i++) {
-    if (/switched/.test(requests[i].url)) {
-      filteredRequests.push(requests[i]);
-    }
-  }
-  strictEqual(filteredRequests.length, 2, 'one refresh was made');
-  strictEqual(filteredRequests[1].url,
-              'http://example.com/switched.m3u8',
-              'refreshed the active playlist');
-});
 test('if withCredentials option is used, withCredentials is set on the XHR object', function() {
  player.hls({
    url: 'http://example.com/media.m3u8',
@@ -1182,20 +1034,15 @@ test('if withCredentials option is used, withCredentials is set on the XHR objec
 });
 test('does not break if the playlist has no segments', function() {
-  var customResponse = function(request) {
-    request.response = new Uint8Array([1]).buffer;
-    request.respond(200,
-                    {'Content-Type': 'application/vnd.apple.mpegurl'},
-                    '#EXTM3U\n' +
-                    '#EXT-X-PLAYLIST-TYPE:VOD\n' +
-                    '#EXT-X-TARGETDURATION:10\n');
-  };
  player.hls('manifest/master.m3u8');
  try {
    videojs.mediaSources[player.currentSrc()].trigger({
      type: 'sourceopen'
    });
-    customResponse(requests[0]);
+    requests[0].respond(200, null,
+                        '#EXTM3U\n' +
+                        '#EXT-X-PLAYLIST-TYPE:VOD\n' +
+                        '#EXT-X-TARGETDURATION:10\n');
  } catch(e) {
    ok(false, 'an error was thrown');
    throw e;