Hi Markus, As you want it to be implemented as new codec by copying speex wrapper files, all you need to modify are those copied files (e.g: different API/function names, payload type, etc) and add the codec init in the application. You can put the codec init right after endpoint instantiation, for example please see pjsua, it is in pjsua_media_subsys_init() pjsua_media.c. That's all. As alternative, you can just make one copy of the speex wrapper (to leave the original unchanged) for all the bitrates, since the codec factory can handle more than one codec as long as you can differentiate them. The current speex codec factory differentiate them using clock rates, so there are 3 'different' codecs handled by this factory (NB, WB, UWB). You can try to implement the codec wrapper by changing the differentiator (e.g: by payload type or codec name). Regards, nanang On 17/04/2008, Markus Vechiorno <finalpfc at hotmail.com> wrote: > > > Hi all, > > I am trying to implement speex with different bitrate as different codecs. > The reason is that I want to change between them during a call without > having to deinitialize and initialize again the speex codec (with a new > quality parameter). > > Benny explained me that the bitrate in speex codec depends on the selected > quality parameter. I made some test and I notice the the different bitrates > I am interested in are obtained with: > -quality = 2 --> bitrate = 5.9 Kbps > -quality = 3 or 4 --> bitrate = 8 Kbps > -quality = 5 or 6 --> bitrate = 11 Kbps > -quality = 7 or 8 --> bitrate = 15 Kbps > -quality = 9 --> bitrate = 18.2 Kbps > > Well, I want to implement as different codecs. > I have read in the pjsip site the way to implement new codecs. What I am > trying is to make 4 copies of speex_codec.c and speex_codec.h and name them > speex_codec5_9, speex_codec_8, asn so... > > Doing some test with the original speex_codec, I noticed that puting a > specific value (for example 2) when initializing the speex in > pjmedia_codec_speex_init function: > spx_factory.speex_param[PARAM_NB].quality = quality; > //Put 2 instead of quality on the right side of = > > then, you could have the speex codec with the bitrate desired. > > Getting to the point, which other files do I need to modify to get these > 'new' codecs implemented? Where to call the init of each_one? > > I know it is not clean doing that, but I need to do it. > > Thanks a lot!!!!!!! > > > > > > ________________________________ > Sigue de cerca las ?ltimas tendencias y lo que m?s rompe MSN V?deo > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > >
