110 lines
4.3 KiB
HTML
110 lines
4.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<title>JSDoc: Source: create-text-tracks-if-necessary.js</title>
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<h1 class="page-title">Source: create-text-tracks-if-necessary.js</h1>
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<section>
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<article>
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<pre class="prettyprint source linenums"><code>/**
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* @file create-text-tracks-if-necessary.js
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*/
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/**
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* Create text tracks on video.js if they exist on a segment.
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*
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* @param {Object} sourceBuffer the VSB or FSB
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* @param {Object} mediaSource the HTML or Flash media source
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* @param {Object} segment the segment that may contain the text track
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* @private
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*/
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const createTextTracksIfNecessary = function(sourceBuffer, mediaSource, segment) {
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const player = mediaSource.player_;
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// create an in-band caption track if one is present in the segment
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if (segment.captions &&
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segment.captions.length) {
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if (!sourceBuffer.inbandTextTracks_) {
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sourceBuffer.inbandTextTracks_ = {};
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}
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for (let trackId in segment.captionStreams) {
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if (!sourceBuffer.inbandTextTracks_[trackId]) {
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player.tech_.trigger({type: 'usage', name: 'hls-608'});
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let track = player.textTracks().getTrackById(trackId);
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if (track) {
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// Resuse an existing track with a CC# id because this was
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// very likely created by videojs-contrib-hls from information
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// in the m3u8 for us to use
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sourceBuffer.inbandTextTracks_[trackId] = track;
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} else {
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// Otherwise, create a track with the default `CC#` label and
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// without a language
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sourceBuffer.inbandTextTracks_[trackId] = player.addRemoteTextTrack({
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kind: 'captions',
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id: trackId,
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label: trackId
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}, false).track;
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}
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}
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}
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}
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if (segment.metadata &&
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segment.metadata.length &&
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!sourceBuffer.metadataTrack_) {
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sourceBuffer.metadataTrack_ = player.addRemoteTextTrack({
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kind: 'metadata',
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label: 'Timed Metadata'
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}, false).track;
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sourceBuffer.metadataTrack_.inBandMetadataTrackDispatchType =
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segment.metadata.dispatchType;
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}
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};
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export default createTextTracksIfNecessary;
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</code></pre>
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</article>
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</section>
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</div>
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<nav>
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<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="FlashMediaSource.html">FlashMediaSource</a></li><li><a href="FlashSourceBuffer.html">FlashSourceBuffer</a></li><li><a href="HtmlMediaSource.html">HtmlMediaSource</a></li><li><a href="MessageHandlers.html">MessageHandlers</a></li><li><a href="VirtualSourceBuffer.html">VirtualSourceBuffer</a></li></ul><h3>Global</h3><ul><li><a href="global.html#abort">abort</a></li><li><a href="global.html#addSourceBuffer">addSourceBuffer</a></li><li><a href="global.html#appendBuffer">appendBuffer</a></li><li><a href="global.html#appendGopInfo_">appendGopInfo_</a></li><li><a href="global.html#endOfStream">endOfStream</a></li><li><a href="global.html#FlashTransmuxerWorker">FlashTransmuxerWorker</a></li><li><a href="global.html#get">get</a></li><li><a href="global.html#gopsSafeToAlignWith">gopsSafeToAlignWith</a></li><li><a href="global.html#MediaSource">MediaSource</a></li><li><a href="global.html#open">open</a></li><li><a href="global.html#remove">remove</a></li><li><a href="global.html#removeGopBuffer">removeGopBuffer</a></li><li><a href="global.html#set">set</a></li><li><a href="global.html#supportsNativeMediaSources">supportsNativeMediaSources</a></li><li><a href="global.html#TransmuxerWorker">TransmuxerWorker</a></li><li><a href="global.html#updateGopBuffer">updateGopBuffer</a></li><li><a href="global.html#URL">URL</a></li></ul>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.4</a> on Thu Nov 02 2017 12:03:25 GMT-0400 (EDT)
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