Can anyone help me in detect inband DTMF?

I want to use pjmedia API to get incoming audio data then use spandsp to analysis the DTMF info,But I can not get the incoming RTP data,Can someone help me ?

Dear ALL, Can anyone help me in detect inband DTMF? I want to use pjmedia API to get incoming audio data then use spandsp to analysis the DTMF info,But I can not get the incoming RTP data,Can someone help me ? The flow is what I have done to get the incoming RTP data . 1.in on_call_media_state pjsua_call_get_info(call_id,&ci); if (ci.media_status == PJSUA_CALL_MEDIA_ACTIVE) { buff = (char*)pj_pool_alloc(pool, 1000*sizeof(char)); pjsua_conf_get_port_info(ci.conf_slot,&info); pjmedia_mem_capture_create(pool,buff,1000,info.clock_rate, info.channel_count,info.samples_per_frame,info.bits_per_sample,0,&media_port); //pjmedia_mem_player_set_eof_cb(media_port,buff,cpa_fft_got_data); pjmedia_mem_capture_set_eof_cb(media_port,buff,cpa_fft_got_data); pjsua_conf_add_port(pool,media_port,&listen_port); pjsua_conf_connect(ci.conf_slot,listen_port); } 2.in callback cpa_fft_got_data pj_status_t cpa_fft_got_data(pjmedia_port *port, void *usr_data) { pjmedia_frame frame ; pj_int16_t samplebuf[1024]; frame.buf = samplebuf; frame.size = 1024; pjmedia_port_get_frame(port,&frame); //PJ_LOG(3,(THIS_FILE,"buf buf %s",usr_data)); if (frame.type== PJMEDIA_FRAME_TYPE_NONE) { return 0; } // .... } Anyway when I send inband DTMF info by another client in cpa_fft_got_data it shows that frame.type == PJMEDIA_FRAE_TYPE_NONE so it will return 0,I can't get any data. So what should I do? http://comments.gmane.org/gmane.comp.voip.pjsip/9720 this address is the sample which I refered to. I'm so sorry my english is very poor. Best Regards. the PJSIP open source SIP stack () - Gmane<http://comments.gmane.org/gmane.comp.voip.pjsip/9720> comments.gmane.org At 10:37 AM 9/15/2009, Archie Rosenblum wrote: Content-Type: multipart/alternative; boundary="----=_NextPart_000_0088_01CA35F8.E071DB00"