On Mon, Jul 21, 2014 at 4:50 PM, Aamoy Gupta <[email protected]> wrote:
> So just to paraphrase, if I had the source of this codec, I would have to > build it, and then trick GMP into thinking that it is an NAL. For now, yes. This isn't that hard, as shown by: http://dxr.mozilla.org/mozilla-central/source/dom/media/gmp-plugin/gmp-fake.cpp > Do you know in the WebRTC trunk which files I would have to modify for > packetization besides "media/webrtc/signaling/src/media" or does that > depend on the codec? > > Sorry for all the clarification questions-- I am very new to this. > > On Monday, July 21, 2014 8:59:34 AM UTC-7, Randell Jesup wrote: > > On 7/21/2014 11:04 AM, Eric Rescorla wrote: > > > > > On Sun, Jul 20, 2014 at 5:06 PM, <[email protected]> wrote: > > > > > > > > > >> Hi everyone, > > > > >> > > > > >> I was interested in modifying the Firefox implementation of WebRTC > (for my > > > > >> own purposes), specifically, adding the MPEG-4 FBA codec to the > > > > >> implementation. I noticed that in the /media directory or Firefox > source, > > > > >> there is the WebRTC installation as well as several codec libraries. > > > > >> > > > > >> I was wondering, how would I be able to add and use additional codec > > > > >> libraries to the Firefox implementation of WebRTC? > > > > > > > > > > You can use the Gecko Media Plugin facility recently landed in Firefox > 33. > > > > > > > > Note that to experiment with a different codec you could masquerade as > > > > an H.264 GMP plugin (with your data hidden in what look like H.264 > > > > NALs). We use mode 1, which effectively lets you produce large binary > > > > blobs of data that get fragmented by the RTP layer and reassembled for > > > > you. Note that the code will make assumptions that the KeyFrame/etc > > > > flags are set correctly. > > > > > > > > To implement a full new codec requires a GMP plugin, and mods to the > > > > media/webrtc/trunk/webrtc code (webrtc.org code in our tree) to > > > > implement packetization/depacketization specific to that codec, and > > > > smaller mods to media/webrtc/signaling/src/media to handle SDP > > > > negotiation. Perhaps a few to signaling/src/media-conduit to handle > > > > config parameters from SDP. > > > > > > > > -- > > > > Randell Jesup, Mozilla > _______________________________________________ > dev-media mailing list > [email protected] > https://lists.mozilla.org/listinfo/dev-media > _______________________________________________ dev-media mailing list [email protected] https://lists.mozilla.org/listinfo/dev-media
