mirror of
https://github.com/jellyfin/jellyfin-web
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84 lines
2.9 KiB
JavaScript
84 lines
2.9 KiB
JavaScript
/* demuxer web worker.
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* - listen to worker message, and trigger DemuxerInline upon reception of Fragments.
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* - provides MP4 Boxes back to main thread using [transferable objects](https://developers.google.com/web/updates/2011/12/Transferable-Objects-Lightning-Fast) in order to minimize message passing overhead.
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*/
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import DemuxerInline from '../demux/demuxer-inline';
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import Event from '../events';
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import EventEmitter from 'events';
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import MP4Remuxer from '../remux/mp4-remuxer';
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var DemuxerWorker = function (self) {
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// observer setup
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var observer = new EventEmitter();
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observer.trigger = function trigger (event, ...data) {
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observer.emit(event, event, ...data);
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};
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observer.off = function off (event, ...data) {
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observer.removeListener(event, ...data);
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};
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self.addEventListener('message', function (ev) {
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//console.log('demuxer cmd:' + ev.data.cmd);
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switch (ev.data.cmd) {
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case 'init':
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self.demuxer = new DemuxerInline(observer,MP4Remuxer);
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break;
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case 'demux':
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var data = ev.data;
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self.demuxer.push(new Uint8Array(data.data), data.audioCodec, data.videoCodec, data.timeOffset, data.cc, data.level, data.sn, data.duration);
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break;
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default:
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break;
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}
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});
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// listen to events triggered by TS Demuxer
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observer.on(Event.FRAG_PARSING_INIT_SEGMENT, function(ev, data) {
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var objData = {event: ev};
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var objTransferable = [];
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if (data.audioCodec) {
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objData.audioCodec = data.audioCodec;
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objData.audioMoov = data.audioMoov.buffer;
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objData.audioChannelCount = data.audioChannelCount;
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objTransferable.push(objData.audioMoov);
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}
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if (data.videoCodec) {
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objData.videoCodec = data.videoCodec;
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objData.videoMoov = data.videoMoov.buffer;
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objData.videoWidth = data.videoWidth;
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objData.videoHeight = data.videoHeight;
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objTransferable.push(objData.videoMoov);
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}
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// pass moov as transferable object (no copy)
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self.postMessage(objData,objTransferable);
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});
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observer.on(Event.FRAG_PARSING_DATA, function(ev, data) {
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var objData = {event: ev, type: data.type, startPTS: data.startPTS, endPTS: data.endPTS, startDTS: data.startDTS, endDTS: data.endDTS, moof: data.moof.buffer, mdat: data.mdat.buffer, nb: data.nb};
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// pass moof/mdat data as transferable object (no copy)
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self.postMessage(objData, [objData.moof, objData.mdat]);
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});
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observer.on(Event.FRAG_PARSED, function(event) {
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self.postMessage({event: event});
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});
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observer.on(Event.ERROR, function(event, data) {
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self.postMessage({event: event, data: data});
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});
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observer.on(Event.FRAG_PARSING_METADATA, function(event, data) {
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var objData = {event: event, samples: data.samples};
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self.postMessage(objData);
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});
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observer.on(Event.FRAG_PARSING_USERDATA, function(event, data) {
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var objData = {event: event, samples: data.samples};
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self.postMessage(objData);
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});
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};
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export default DemuxerWorker;
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