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jellyfin-web/dashboard-ui/bower_components/hls.js/src/demux/demuxer-worker.js
Luke Pulverenti 08122a5e93 update login
2016-02-24 22:15:07 -05:00

67 lines
2.3 KiB
JavaScript

/* demuxer web worker.
* - listen to worker message, and trigger DemuxerInline upon reception of Fragments.
* - 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.
*/
import DemuxerInline from '../demux/demuxer-inline';
import Event from '../events';
import EventEmitter from 'events';
var DemuxerWorker = function (self) {
// observer setup
var observer = new EventEmitter();
observer.trigger = function trigger (event, ...data) {
observer.emit(event, event, ...data);
};
observer.off = function off (event, ...data) {
observer.removeListener(event, ...data);
};
self.addEventListener('message', function (ev) {
var data = ev.data;
//console.log('demuxer cmd:' + data.cmd);
switch (data.cmd) {
case 'init':
self.demuxer = new DemuxerInline(observer, data.typeSupported);
break;
case 'demux':
self.demuxer.push(new Uint8Array(data.data), data.audioCodec, data.videoCodec, data.timeOffset, data.cc, data.level, data.sn, data.duration);
break;
default:
break;
}
});
// listen to events triggered by Demuxer
observer.on(Event.FRAG_PARSING_INIT_SEGMENT, function(ev, data) {
self.postMessage({event: ev, tracks : data.tracks, unique : data.unique });
});
observer.on(Event.FRAG_PARSING_DATA, function(ev, data) {
var objData = {event: ev, type: data.type, startPTS: data.startPTS, endPTS: data.endPTS, startDTS: data.startDTS, endDTS: data.endDTS, data1: data.data1.buffer, data2: data.data2.buffer, nb: data.nb};
// pass data1/data2 as transferable object (no copy)
self.postMessage(objData, [objData.data1, objData.data2]);
});
observer.on(Event.FRAG_PARSED, function(event) {
self.postMessage({event: event});
});
observer.on(Event.ERROR, function(event, data) {
self.postMessage({event: event, data: data});
});
observer.on(Event.FRAG_PARSING_METADATA, function(event, data) {
var objData = {event: event, samples: data.samples};
self.postMessage(objData);
});
observer.on(Event.FRAG_PARSING_USERDATA, function(event, data) {
var objData = {event: event, samples: data.samples};
self.postMessage(objData);
});
};
export default DemuxerWorker;