Re: [Bug 26060] New: Media Source and Web Worker

Apparently I can not comment the bug reports, I don't get the use case 
too here and the benefit/use of the worker as well as the interaction 
between the worker and the parent.

Regards

Aymeric

Le 11/06/2014 16:14, bugzilla@jessica.w3.org a écrit :
> https://www.w3.org/Bugs/Public/show_bug.cgi?id=26060
>
>              Bug ID: 26060
>             Summary: Media Source and Web Worker
>             Product: HTML WG
>             Version: unspecified
>            Hardware: All
>                  OS: All
>              Status: NEW
>            Severity: normal
>            Priority: P2
>           Component: Media Source Extensions
>            Assignee: adrianba@microsoft.com
>            Reporter: saran@exaeone.com
>          QA Contact: public-html-bugzilla@w3.org
>                  CC: mike@w3.org, public-html-media@w3.org
>
> One possible use case scenario for the Media Source Extension is to construct a
> live video stream. In an effort to keep latency low, one may decide to make the
> media segments very small but have them arrive very frequently. This has the
> potential to cause the main thread to block and become unresponsive.
>
> In order to alleviate this, it would be useful to be able to create the
> MediaSource object in a Worker running in a separate thread, and send its Blob
> URI back to the parent script.
>
> As an example, with still images it is currently possible to do the following
> with XMLHttpRequest. The same technique may also be useful in the MediaSource
> scenario using WebSockets (which are already available in Workers).
>
> ----------
> main.js
> ----------
> var worker = new Worker('worker.js');
> var img;
>
> window.onload = function (event) {
>      img = document.getElementById('img');
>      worker.postMessage('bh.jpg');
> }
>
> worker.onmessage = function (event) {
>      img.src = event.data;
> }
> ----------
>
> ----------
> worker.js
> ----------
> var xhr = new XMLHttpRequest();
> var ms = new MediaSource();
>
> onmessage = function (event) {
>      xhr.open('GET', event.data, true);
>      xhr.responseType = 'blob';
>      xhr.send();
> }
>
> xhr.onload = function (event) {
>      postMessage(URL.createObjectURL(xhr.response));
> }
> ----------
>

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Received on Wednesday, 11 June 2014 18:02:53 UTC