fix audio tracks

dashboard-ui/css/mediaplayer-video.css

@@ -359,3 +359,22 @@ video::-webkit-media-text-track-background {
     /*Style the text itself*/
     margin-top: -2.5em;
 }
+
+.videoSubtitles {
+    position: fixed;
+    z-index: 99997;
+    bottom: 10%;
+    text-align: center;
+    font-size: 400%;
+    left: 0;
+    right: 0;
+    color: #fff;
+}
+
+.videoSubtitlesInner {
+    max-width: 70%;
+    background-color: rgba(0,0,0,.8);
+    padding: .25em;
+    margin: auto;
+    display: inline-block;
+}

dashboard-ui/css/site.css

@@ -1189,6 +1189,13 @@ paper-input + .fieldDescription {
     margin-bottom: 30px !important;
 }
 
+.ui-content {
+    border-width: 0;
+    overflow: visible;
+    overflow-x: hidden;
+    padding: 1em;
+}
+
 .page > .ui-content, .pageWithAbsoluteTabs .pageTabContent {
     /* Need this so that the audio player doesn't cover content, but also for unveil lazy loading. */
     padding-bottom: 160px;

dashboard-ui/devices/ios/ios.css

@@ -242,3 +242,7 @@ div.cardBox {
 .localSyncStatus .labelSyncStatus {
     display: none !important;
 }
+
+.videoSubtitles {
+    font-size: 300%;
+}

dashboard-ui/scripts/htmlmediarenderer.js

@@ -12,6 +12,7 @@
         var self = this;
 
         function onEnded() {
+            destroyCustomTrack();
             Events.trigger(self, 'ended');
         }
 
@@ -31,6 +32,7 @@
             //        }
             //    }
             //}
+            updateSubtitleText(this.currentTime * 1000);
 
             Events.trigger(self, 'timeupdate');
         }
@@ -68,6 +70,8 @@
 
         function onError(e) {
 
+            destroyCustomTrack();
+
             var elem = e.target;
             var errorCode = elem.error ? elem.error.code : '';
             console.log('Media element error code: ' + errorCode);
@@ -271,6 +275,9 @@
         };
 
         self.stop = function () {
+
+            destroyCustomTrack();
+
             if (mediaElement) {
                 mediaElement.pause();
 
@@ -421,6 +428,7 @@
         };
 
         function setTracks(elem, tracks) {
+
             var html = tracks.map(function (t) {
 
                 var defaultAttribute = t.isDefault ? ' default' : '';
@@ -430,10 +438,8 @@
 
             }).join('');
 
-            if (html) {
             elem.innerHTML = html;
         }
-        }
 
         self.currentSrc = function () {
             if (mediaElement) {
@@ -503,20 +509,127 @@
             return supportsTextTracks;
         };
 
+        function enableNativeTrackSupport(track) {
+
+            if (browserInfo.safari) {
+                return false;
+            }
+
+            return true;
+        }
+
+        function destroyCustomTrack() {
+
+            var videoSubtitlesElem = document.querySelector('.videoSubtitles');
+            if (videoSubtitlesElem) {
+                videoSubtitlesElem.parentNode.removeChild(videoSubtitlesElem);
+            }
+
+            currentSubtitlesElement = null;
+            currentTrackEvents = null;
+            customTrackIndex = -1;
+        }
+
+        function fetchSubtitles(track) {
+
+            return ApiClient.ajax({
+                url: track.url.replace('.vtt', '.js'),
+                type: 'GET',
+                dataType: 'json'
+            });
+        }
+
+        function setTrackForCustomDisplay(track) {
+
+            if (!track) {
+                destroyCustomTrack();
+                return;
+            }
+
+            // if already playing this track, skip
+            if (customTrackIndex == track.index) {
+                return;
+            }
+
+            destroyCustomTrack();
+            customTrackIndex = track.index;
+
+            // download the track json
+            fetchSubtitles(track).then(function (data) {
+
+                // show in ui
+                console.log('downloaded ' + data.TrackEvents.length + ' track events');
+                currentTrackEvents = data.TrackEvents;
+            });
+        }
+
+        var currentSubtitlesElement;
+        var currentTrackEvents;
+        var customTrackIndex = -1;
+        var lastCustomTrackMs = 0;
+        function updateSubtitleText(timeMs) {
+
+            var trackEvents = currentTrackEvents;
+            if (!trackEvents) {
+                return;
+            }
+
+            if (!currentSubtitlesElement) {
+                var videoSubtitlesElem = document.querySelector('.videoSubtitles');
+                if (!videoSubtitlesElem) {
+                    videoSubtitlesElem = document.createElement('div');
+                    videoSubtitlesElem.classList.add('videoSubtitles');
+                    videoSubtitlesElem.innerHTML = '<div class="videoSubtitlesInner"></div>';
+                    document.body.appendChild(videoSubtitlesElem);
+                }
+                currentSubtitlesElement = videoSubtitlesElem.querySelector('.videoSubtitlesInner');
+            }
+
+            if (lastCustomTrackMs > 0) {
+                if (Math.abs(lastCustomTrackMs - timeMs) < 500) {
+                    return;
+                }
+            }
+
+            var positionTicks = timeMs * 10000;
+            for (var i = 0, length = trackEvents.length; i < length; i++) {
+
+                var caption = trackEvents[i];
+                if (positionTicks >= caption.StartPositionTicks && positionTicks <= caption.EndPositionTicks) {
+                    currentSubtitlesElement.innerHTML = caption.Text;
+                    currentSubtitlesElement.classList.remove('hide');
+                    return;
+                }
+            }
+
+            currentSubtitlesElement.innerHTML = '';
+            currentSubtitlesElement.classList.add('hide');
+        }
+
         self.setCurrentTrackElement = function (streamIndex) {
 
             console.log('Setting new text track index to: ' + streamIndex);
 
-            var allTracks = mediaElement.textTracks; // get list of tracks
-
-            var modes = ['disabled', 'showing', 'hidden'];
-            var expectedId = 'textTrack' + streamIndex;
-
             var track = streamIndex == -1 ? null : currentTrackList.filter(function (t) {
                 return t.index == streamIndex;
             })[0];
-            var trackIndex = streamIndex == -1 || !track ? -1 : currentTrackList.indexOf(track);
 
+            if (enableNativeTrackSupport(track)) {
+
+                setTrackForCustomDisplay(null);
+            } else {
+                setTrackForCustomDisplay(track);
+
+                // null these out to disable the player's native display (handled below)
+                streamIndex = -1;
+                track = null;
+            }
+
+            var expectedId = 'textTrack' + streamIndex;
+            var trackIndex = streamIndex == -1 || !track ? -1 : currentTrackList.indexOf(track);
+            var modes = ['disabled', 'showing', 'hidden'];
+
+            var allTracks = mediaElement.textTracks; // get list of tracks
             for (var i = 0; i < allTracks.length; i++) {
 
                 var currentTrack = allTracks[i];

dashboard-ui/thirdparty/jquerymobile-1.4.5/jquery.mobile.custom.theme.css

@@ -261,13 +261,6 @@ div.ui-mobile-viewport {
         display: inline-block;
     }
 
-.ui-content {
-    border-width: 0;
-    overflow: visible;
-    overflow-x: hidden;
-    padding: 1em;
-}
-
 /* Buttons and icons */
 .ui-btn, ul[data-role="listview"] a + a {
     font-size: 16px;

dashboard-ui/thirdparty/paper-button-style.css

@@ -7,6 +7,7 @@
 
     paper-button.block {
         display: block;
+        margin: .25em 0;
     }
 
     paper-button.blue {