function setupSideloadedTracks(itemTracks) {
// Add tracks if we're starting playback or resuming after a midroll
if (!this.renderNatively) {
return;
}
// Determine if the tracks are the same and the embedded + sideloaded count = # of tracks in the controlbar
var alreadyLoaded = itemTracks === this._itemTracks;
if (!alreadyLoaded) {
cancelXhr(this._itemTracks);
}
this._itemTracks = itemTracks;
if (!itemTracks) {
return;
}
if (!alreadyLoaded) {
this.disableTextTrack();
_clearSideloadedTextTracks.call(this);
this.addTextTracks(itemTracks);
}
}
function clearTracks() {
cancelXhr(this._itemTracks);
var metadataTrack = this._tracksById && this._tracksById.nativemetadata;
if (this.renderNatively || metadataTrack) {
_removeCues(this.renderNatively, this.video.textTracks);
if (metadataTrack) {
metadataTrack.oncuechange = null;
}
}
this._itemTracks = null;
this._textTracks = null;
this._tracksById = null;
this._cuesByTrackId = null;
this._metaCuesByTextTime = null;
this._unknownCount = 0;
this._activeCuePosition = null;
if (this.renderNatively) {
// Removing listener first to ensure that removing cues does not trigger it unnecessarily
this.removeTracksListener(this.video.textTracks, 'change', this.textTrackChangeHandler);
_removeCues(this.renderNatively, this.video.textTracks);
}
}