SIP is used by audio applications mostly, sound is the main concern of SIP. But one might use SIP for other types of applications like stated in RFCs "white board". Also SDP can be used to describe application specific data rather sound encoding/decoding schema. How can I use pjsip in order to create an application dealing with raw data rather than sound and how can I modify SDP to accomplish that. Your directions are very welcome -- Kabil Akpınar

2010/8/17 Kabil Akpınar <kabilakpinar@gmail.com>: > SIP is used by audio applications mostly, sound is the main concern of SIP. > But one might use SIP for other types of applications like stated in RFCs > "white board". Also SDP can be used to describe application specific data > rather sound encoding/decoding schema. > How can I use pjsip in order to create an application dealing with raw data > rather than sound and how can I modify SDP to accomplish that. > Your directions are very welcome > As you can see in library architecture diagram in http://www.pjsip.org/docs.htm, the libraries in PJSIP distro are arranged in layers. The PJSUA-LIB, as the highest abstraction, is tied up with media (audio, in this case. video is coming though ;-), to make it easy to use, and currently does not support other media in the SDP (unless if you hack it of course). But if you work with the lower level invite session directly (see [1]), you have full control over the SDP content that will be negotiated by the session, so at this level any media in the SDP is supported. [1] http://www.pjsip.org/pjsip/docs/html/group__PJSIP__INV.htm Cheers Benny

On Tue, Aug 17, 2010 at 5:38 PM, Benny Prijono <bennylp@teluu.com> wrote: > 2010/8/17 Kabil Akpınar <kabilakpinar@gmail.com>: > > SIP is used by audio applications mostly, sound is the main concern of > SIP. > > But one might use SIP for other types of applications like stated in RFCs > > "white board". Also SDP can be used to describe application specific data > > rather sound encoding/decoding schema. > > How can I use pjsip in order to create an application dealing with raw > data > > rather than sound and how can I modify SDP to accomplish that. > > Your directions are very welcome > > > > As you can see in library architecture diagram in > http://www.pjsip.org/docs.htm, the libraries in PJSIP distro are > arranged in layers. The PJSUA-LIB, as the highest abstraction, is tied > up with media (audio, in this case. video is coming though ;-), Indeed I am used to those layers. And As you said I will need to create a layer similar to PJSUA but for raw data. The layer will need pjmedia and pjsip. And you said video? really? and when? :) > to > make it easy to use, and currently does not support other media in the > SDP (unless if you hack it of course). > Well higher level is really bound to audio as far as I digged the source code. > > But if you work with the lower level invite session directly (see > [1]), you have full control over the SDP content that will be > negotiated by the session, so at this level any media in the SDP is > supported. > I will check it out. > [1] http://www.pjsip.org/pjsip/docs/html/group__PJSIP__INV.htm > Cheers > Benny > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip@lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > -- Kabil Akpınar

2010/8/17 Kabil Akpınar <kabilakpinar@gmail.com>: > Indeed I am used to those layers. And As you said I will need to create a > layer similar to PJSUA but for raw data. The layer will need pjmedia and > pjsip. And you said video? really? and when? :) We plan to have video in 2.0, and 2.0 will be released after 1.8. As for time frame, I imagine it will be no sooner than 2-3 months after 1.8. Cheers Benny

On Wed, Aug 18, 2010 at 5:11 AM, Benny Prijono <bennylp@teluu.com> wrote: > 2010/8/17 Kabil Akpınar <kabilakpinar@gmail.com>: > > Indeed I am used to those layers. And As you said I will need to create a > > layer similar to PJSUA but for raw data. The layer will need pjmedia and > > pjsip. And you said video? really? and when? :) > > We plan to have video in 2.0, and 2.0 will be released after 1.8. As > for time frame, I imagine it will be no sooner than 2-3 months after > 1.8. > > It is very exiting. I wondered now, how would video SDP seem? Can you suggest some link or give some info about it? > Cheers > Benny > > Cheers as well Kabil Akpınar