<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Jan 17, 2015 at 12:04 AM, Yaron Nachum <span dir="ltr"><<a href="mailto:nachum.yaron@gmail.com" target="_blank">nachum.yaron@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div dir="ltr">Hello Asterisk Users,<div>I have been looking for similar auto dtmf mode implementation on pjsip, but didn't see it coming, so I decided to give it a try.</div><div>My basic plan was to do it as simple as possible with minimum changes because I am not familiar with all Asterisk code. My idea is to use rfc4733 settings, but when going over the codecs check if telephone-event appear and if not set the dtmf mode to inband on rtp instance.</div><div>I would appreciate if someone would look at what I did and see if I didn't do stupid things. If you think this is something you would like to add to one of the next releases I am willing to help - add the additional dtmf mode ...</div><div>I based my development on 13.1.0. The following are my changes:</div><div><div><br></div><div>In res/res_pjsip_sdp_rtp.c (I added session_media to get_codecs and used it in order to update dtmf settings on rtp instance when telephone-event is not included in the sdp):</div><div>150:</div><div>static void get_codecs(struct ast_sip_session *session, const struct pjmedia_sdp_media *stream, struct ast_rtp_codecs *codecs<span style="background-color:rgb(255,255,0)">, struct ast_sip_session_media *session_media</span>)</div></div><div>159:</div><div><div> char fmt_param[256];</div></div><div> <span style="background-color:rgb(255,255,0)">int tel_event = 0;</span></div><div>177:</div><div><div> ast_copy_pj_str(name, &rtpmap->enc_name, sizeof(name));</div></div><div><div><span style="background-color:rgb(255,255,0)"> if (strcmp(name,"telephone-event") == 0) {</span></div><div><span style="background-color:rgb(255,255,0)"> tel_event++;</span></div><div><span style="background-color:rgb(255,255,0)"> }</span></div></div><div>202:</div><div><div> }</div><div><div> <span style="background-color:rgb(255,255,0)"> if (tel_event==0) {</span></div><div><span style="background-color:rgb(255,255,0)"> ast_rtp_instance_dtmf_mode_set(session_media->rtp, AST_RTP_DTMF_MODE_INBAND);</span></div><div><span style="background-color:rgb(255,255,0)"> }</span></div></div><div> /* Get the packetization, if it exists */</div></div><div>241:</div><div><div> get_codecs(session, stream, &codecs<span style="background-color:rgb(255,255,0)">, session_media</span>);</div></div><div><br></div><div>In res/res_pjsip_session.c (Just activated DSP also on RFC dtmf mode - I didn't find a way to test the rtp instance dtmf settiings because session_media pointer is not there. Any advice for doing so would be appreciated):</div><div>1062:</div><div><div> if (endpoint->dtmf == AST_SIP_DTMF_INBAND <span style="background-color:rgb(255,255,0)">|| endpoint->dtmf == AST_SIP_DTMF_RFC_4733</span>) {</div><div> dsp_features |= DSP_FEATURE_DIGIT_DETECT;</div><div> }</div></div><div><br></div><div>In channels/chan_pjsip.c (1 change similar to the above, and 2 more changes to send inband dtmf when rtp instance dtmf settings is inband)</div><div>543:</div><div><div> if (session->endpoint->dtmf == AST_SIP_DTMF_INBAND <span style="background-color:rgb(255,255,0)">|| session->endpoint->dtmf == AST_SIP_DTMF_RFC_4733</span>) {</div><div> ast_dsp_set_features(session->dsp, DSP_FEATURE_DIGIT_DETECT);</div></div><div>1420:</div><div> if (!media || !media->rtp <span style="background-color:rgb(255,255,0)">|| (ast_rtp_instance_dtmf_mode_get(media->rtp) == AST_RTP_DTMF_MODE_INBAND)</span>) {<br></div><div> return -1;<br></div><div>1523:</div><div><div> if (!media || !media->rtp <span style="background-color:rgb(255,255,0)">|| (ast_rtp_instance_dtmf_mode_get(media->rtp) == AST_RTP_DTMF_MODE_INBAND)</span>) {<br></div><div> return -1;</div></div><div><br></div><div>That's it!!! It works fine for me. Any remarks / advice would be appreciated.</div><span class=""><font color="#888888"><span></span></font></span><br clear="all"></div></div></div></blockquote></div><br></div><div class="gmail_extra">Hey Yaron:<br><br>Sounds like a good contribution. Since it is a code change, you may want to discuss it further over on the asterisk-dev list.<br><br>If you're interested in submitting the contribution upstream to the project, you can find instructions on the Asterisk wiki:<br><br><a href="https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process">https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process</a><br><br></div><div class="gmail_extra">Thanks!<br><br>Matt<br></div><div class="gmail_extra"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div>Matthew Jordan<br></div><div>Digium, Inc. | Engineering Manager</div><div>445 Jan Davis Drive NW - Huntsville, AL 35806 - USA</div><div>Check us out at: <a href="http://digium.com" target="_blank">http://digium.com</a> & <a href="http://asterisk.org" target="_blank">http://asterisk.org</a></div></div></div>
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