Ok I have not done inband but I have done FFT and they are similar in terms of approach. For inband dtmf check out this algorithm. http://en.wikipedia.org/wiki/Goertzel_algorithm Now for how to get the audio data from the conference port source to the detection algorithm. Do this. Just a memory capture device and every time you get a packet of audio data call this dedection function to determine what dtmf's are present, then you can call your on_dtmf_callback function for a seemless interface between inband and non-inband calls. That is the short answer. At 01:50 PM 8/15/2009, Archie Rosenblum wrote: >Content-Type: multipart/alternative; > boundary="----=_NextPart_000_000B_01CA1DB7.BED967A0" >Content-Language: en-us > >Hi, > >Does anyone have an in-band DTMF solution for pjsip? I know this >question has been raised in the past and I am hoping some >crackerjack coder has figured it out and would like to share it with >the group. I've been seeing more and more DTMF converted to in-band >through various voip providers and I just not savvy enough to >understand how to code this detection in pjsip. > >Any help is appreciated. > >Sincerely, >Archie >_______________________________________________ >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
