Re: [pjsip] PJSIP How to detect inband DTMF (no rfc2833）
Hello Gou Yangyan,
I think the way you want to implement it is the complicated way.
The best route is (I think) using SpanDSP library. This library contains a
very good in-band DTMF detection, including prevention of false DTMF
detection. SpanDSP is actually a quite big library which includes also fax
functionality. But you only need the DTMF detection parts, which you can
take out of the library (which is what I did).
You can easily integrate it alike the "way-writer"-plugin and also use it
that way.
You only need to initialize it and then feed the SpanDSP-detection routine
with the frames you receive. No special manipulation on the frames is
required.
Some people and myself already implemented it this way, and it works like a
charm.
With regards,
Eize
On Tue, Feb 16, 2016 at 6:00 PM, pjsip-request@lists.pjsip.org wrote:
From: gou yangyang gyy2046@outlook.com
To: "pjsip@lists.pjsip.org" pjsip@lists.pjsip.org
Cc:
Date: Tue, 16 Feb 2016 03:04:06 +0000
Subject: [pjsip] PJSIP How to detect inband DTMF (no rfc2833）
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.
Dear Eize,
Can you give me some sample code " alike the "wav-writer"-plugin ",Sorry I'm a new man in pjsip project.
Thank you very much.
Best Regards.
发件人: Eize Slange eize.slange@gmail.com
发送时间: 2016年2月17日 8:42
收件人: pjsip@lists.pjsip.org
抄送: gyy2046@outlook.com
主题: Re: PJSIP How to detect inband DTMF (no rfc2833）
Hello Gou Yangyan,
I think the way you want to implement it is the complicated way.
The best route is (I think) using SpanDSP library. This library contains a very good in-band DTMF detection, including prevention of false DTMF detection. SpanDSP is actually a quite big library which includes also fax functionality. But you only need the DTMF detection parts, which you can take out of the library (which is what I did).
You can easily integrate it alike the "way-writer"-plugin and also use it that way.
You only need to initialize it and then feed the SpanDSP-detection routine with the frames you receive. No special manipulation on the frames is required.
Some people and myself already implemented it this way, and it works like a charm.
With regards,
Eize
On Tue, Feb 16, 2016 at 6:00 PM, <pjsip-request@lists.pjsip.orgmailto:pjsip-request@lists.pjsip.org> wrote:
From: gou yangyang <gyy2046@outlook.commailto:gyy2046@outlook.com>
To: "pjsip@lists.pjsip.orgmailto:pjsip@lists.pjsip.org" <pjsip@lists.pjsip.orgmailto:pjsip@lists.pjsip.org>
Cc:
Date: Tue, 16 Feb 2016 03:04:06 +0000
Subject: [pjsip] PJSIP How to detect inband DTMF (no rfc2833）
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.inhttp://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.inhttp://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.