Bruce, Thanks for this info regarding websockets. Very interesting.
Regarding codecs, it is my understanding that all major browsers support Opus by now but I admit that I do not have any practical experience how that works for real-time audio streaming outside WebRTC. For client/server written in C, opus is really great though. Alex On Thu, Apr 23, 2015 at 5:25 AM, Bruce Perens <[email protected]> wrote: > > I've spent the last few days learning the web audio API and websockets, > so that we can have a browser control panel for DVS and Whitebox, and > use the mic and speaker through the browser. It turns out to not be that > hard, and once that's done you need no drivers, no GUI porting. All of > the necessary facilities are in Firefox, Chrome, Opera, Android, iOS. > There's even someone who has already written a nice waterfall in javascript. > > WebRTC is not ready for embedded use unless you're embedding node.js. > The currently available C code pulls in much of Chrome. It's too big and > has a really steep learning curve. No doubt better embedded C code will > come along. > > Websockets, on the other hand, have an excellent embedded C library in > libwebsockets, and both the C and javascript side are easy to use. > Finally, a session-based full-duplex connection in the browser. But you > lose some things that WebRTC would give you: the codecs, the variable > bandwidth, and the NAT traversal. On the other hand, you can code a much > easier connection scheme than WebRTC would require. > > Astonishingly, the web audio API includes an FFT that runs in your > browser. And a nice biquad filter. There is a reasonably complete audio > processing graph. It is not inconceivable that a codec could be > implemented in javascript using some of these facilities. > > For now, I'm not using a codec but just using downsampled audio in > narrower data than the native form. > > Thanks > > Bruce > > ------------------------------------------------------------------------------ > BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT > Develop your own process in accordance with the BPMN 2 standard > Learn Process modeling best practices with Bonita BPM through live exercises > http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ > source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
