October 2011 - freeswitch-dev@lists.freeswitch.org

Re: [Freeswitch-dev] Sofia and "ep_codec_string"
by Giovanni Visciano 21 Oct '11

21 Oct '11

Sorry for the double posting. I sent this question also from my office email giovanni.visciano(a)italtel.it. Please ignore this one. Thanks. Giovanni -----Original Message----- From: freeswitch-dev-bounces(a)lists.freeswitch.org [mailto:freeswitch-dev-bounces@lists.freeswitch.org] On Behalf Of Giovanni Visciano Sent: Friday, October 21, 2011 7:35 AM To: freeswitch-dev(a)lists.freeswitch.org Subject: [Freeswitch-dev] Sofia and "ep_codec_string" Preconditions on sip profile ---------------------------- inbound-codec-prefs NOT set outbound-codec-prefs NOT set inbound-proxy-media=TRUE inbound-bypass-media=FALSE inbound-late-negotiation=TRUE + inherit_codec=TRUE TEST scenario ------------- SIP phone send INVITE with SDP to FS INVITE SDP[codelist=PCMA, PCMU, G722, G729] --> FS FS has just the CORE_PC_MODULE [PCMA, PCMU, PASS-THR, VIDEO-PASS-THR, L16] The "ep_codec_string" channel variable is loaded with [PCMA, PCMU] EXPECTED -------- In "proxy-media + late-negotiation" scenario: ep_codec_string=[PCMA,PCMU,G722,G729] PROBLEM ------- According to the documentation (http://wiki.freeswitch.org/wiki/Codec_negotiation) "ep_codec_string: This variable is only available if late negotiation is enabled on the profile. It's a readable string containing all the codecs proposed by the calling endpoint." and "inherit_codec=true (only applicable when late-negotiation is enabled) will take the codec negotiated when the B leg answers and pass it to the A leg so it also uses the same codec (if the A leg supports it); otherwise, it will use whatever it can from its own list" The variable ep_codec_string doesn't contain ALL the codecs proposed by the calling endpoint. It contains the intersection between the codecs proposed by the calling and the codecs loaded in FS. In proxy-media / no-media configuration the called endpoint doesn't have the calling codec list so he can't negotiate using all the capabilities available. (I'm working on a test endpoint module that should work in proxy and no-media configuration ... mod_sofia vs mod_sofia works because they look at the remote sdp variable) Source reference - sofia_glue.c->sofia_glue_set_r_sdp_codec_string() Regards, Giovanni

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[Freeswitch-dev] Sofia and "ep_codec_string"
by Giovanni Visciano 21 Oct '11

21 Oct '11

Preconditions on sip profile ---------------------------- inbound-codec-prefs NOT set outbound-codec-prefs NOT set inbound-proxy-media=TRUE inbound-bypass-media=FALSE inbound-late-negotiation=TRUE + inherit_codec=TRUE TEST scenario ------------- SIP phone send INVITE with SDP to FS INVITE SDP[codelist=PCMA, PCMU, G722, G729] --> FS FS has just the CORE_PC_MODULE [PCMA, PCMU, PASS-THR, VIDEO-PASS-THR, L16] The "ep_codec_string" channel variable is loaded with [PCMA, PCMU] EXPECTED -------- In "proxy-media + late-negotiation" scenario: ep_codec_string=[PCMA,PCMU,G722,G729] PROBLEM ------- According to the documentation (http://wiki.freeswitch.org/wiki/Codec_negotiation) "ep_codec_string: This variable is only available if late negotiation is enabled on the profile. It's a readable string containing all the codecs proposed by the calling endpoint." and "inherit_codec=true (only applicable when late-negotiation is enabled) will take the codec negotiated when the B leg answers and pass it to the A leg so it also uses the same codec (if the A leg supports it); otherwise, it will use whatever it can from its own list" The variable ep_codec_string doesn't contain ALL the codecs proposed by the calling endpoint. It contains the intersection between the codecs proposed by the calling and the codecs loaded in FS. In proxy-media / no-media configuration the called endpoint doesn't have the calling codec list so he can't negotiate using all the capabilities available. (I'm working on a test endpoint module that should work in proxy and no-media configuration ... mod_sofia vs mod_sofia works because they look at the remote sdp variable) Source reference - sofia_glue.c->sofia_glue_set_r_sdp_codec_string() Regards, Giovanni

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Re: [Freeswitch-dev] get variable value
by adam harris 20 Oct '11

20 Oct '11

Yes I am using ESL but don't get_header functions need to catch an event first. I was thinking if there was already a builtin function. I can't remember exacty because it was a while ago but I used something like this in ruby @con.api("uuid_getvar", "#{@uuid} myvar").getBody > ----- Original Message ----- > From: João Mesquita > Sent: 10/19/11 10:55 PM > To: freeswitch-dev(a)lists.freeswitch.org > Subject: Re: [Freeswitch-dev] get variable value > > >From your email, I am assuming you are trying to get a variable using ESL? > If so, custom variables are prefixed with variable. So you would use the > get_header functions just as you would on other non-custom variables. > > Makes sense? > > Regards, > João Mesquita > > > > On Wed, Oct 19, 2011 at 7:27 PM, Michael Collins <msc(a)freeswitch.org> wrote: > > > Grep the source for "switch_channel_get_variable" and you'll see numerous > > examples... > > > > -MC > > > > On Wed, Oct 19, 2011 at 12:37 PM, adam harris <admharris(a)gmx.com> wrote: > > > >> How do I get the vaule of a custom variable. I have seen uuid_getvar > >> Usage: uuid_getvar <uuid> <varname> but how I use in C > >> > >> _______________________________________________ > >> Join us at ClueCon 2011, Aug 9-11, Chicago > >> http://www.cluecon.com 877-7-4ACLUE > >> > >> FreeSWITCH-dev mailing list > >> FreeSWITCH-dev(a)lists.freeswitch.org > >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev > >> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev > >> http://www.freeswitch.org > >> > > > > > > _______________________________________________ > > Join us at ClueCon 2011, Aug 9-11, Chicago > > http://www.cluecon.com 877-7-4ACLUE > > > > FreeSWITCH-dev mailing list > > FreeSWITCH-dev(a)lists.freeswitch.org > > http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev > > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev > > http://www.freeswitch.org > > > >

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[Freeswitch-dev] FreeSWITCH dialstring/channel variables
by lg 20 Oct '11

20 Oct '11

One quick question here. Is it any dialstring to control dial function? Like as,i would change the dial legs sequence as dial caller number first and then when caller pickup the call, dial the called destination number ( as the same as "originate dial_string destination_number" function). Your hint or short response would be much appreciated. Thanks, Grant

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Re: [Freeswitch-dev] Couple of questions about esl in C
by adam harris 20 Oct '11

20 Oct '11

I want to try one more thing to see if it solves my problem int response_timeout = (10 * 1000); esl_status_t status; status = esl_recv_event_timed(call_info->global_handle, response_timeout, 0, xxxxx); The note for the last paramter is: \param[out] save_event If this is not NULL, will return the event received What type of varible do I need to pass as the paramter and where will the return data go and how to access it. I have noticed this channel variable Application-Response: FILE%20PLAYED which possibly might indicate playback completion? > ----- Original Message ----- > From: Michael Collins > Sent: 10/19/11 10:30 PM > To: freeswitch-dev(a)lists.freeswitch.org > Subject: Re: [Freeswitch-dev] Couple of questions about esl in C > > On Wed, Oct 19, 2011 at 12:21 PM, adam harris <admharris(a)gmx.com> wrote: > > > A few questions about esl in C > > > > 1, After sending api playback command I want to wait until the file is done > > playing. How do I do this is C > > > > 2, Whats the proper way to use esl_recv_event_timed and esl_recv_even I > > tried it like this esl_recv_event_timed(call_info->global_handle, 10, 0, > > NULL); but that printed the complete event on screen. I want to do this in a > > while loop to check for event-name > > > > Would you mind putting some code snippets here or in > pastebin.freeswitch.org? > -MC

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[Freeswitch-dev] get variable value
by adam harris 19 Oct '11

19 Oct '11

How do I get the vaule of a custom variable. I have seen uuid_getvar Usage: uuid_getvar <uuid> <varname> but how I use in C

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[Freeswitch-dev] Couple of questions about esl in C
by adam harris 19 Oct '11

19 Oct '11

A few questions about esl in C 1, After sending api playback command I want to wait until the file is done playing. How do I do this is C 2, Whats the proper way to use esl_recv_event_timed and esl_recv_even I tried it like this esl_recv_event_timed(call_info->global_handle, 10, 0, NULL); but that printed the complete event on screen. I want to do this in a while loop to check for event-name Can you please resend this to freeswitch-dev(a)lists.freeswitch.org -MC On Wed, Oct 19, 2011 at 9:10 AM, adam harris <admharris(a)gmx.com> wrote: After sending api playback command I want to wait until the file is done playing How do I do this is C

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[Freeswitch-dev] FreeSWITCH Conference Call Today
by Michael Collins 19 Oct '11

19 Oct '11

Hello all, Our agenda today is light: http://wiki.freeswitch.org/wiki/FS_weekly_2011_10_19 We're going to have a community scrum where we ask each other questions, etc. I have a few minor updates for you all as well. Talk to you soon. -Michael

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[Freeswitch-dev] FreeSWITCH Conference Call Right Now! - Phil Zimmermann
by Michael Collins 17 Oct '11

17 Oct '11

Hey all, It seems my first email to the list didn't make it. Just a reminder that Philip Zimmermann of PGP fame is coming in to talk about VoIP security, ZRTP and Zfone. Please join us now! -Michael

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Re: [Freeswitch-dev] MTU setting and application buffer size
by Juraj Fabo 17 Oct '11

17 Oct '11

Hi, I read through the previous answers several times again and did some progress. I found out that the valid codec_ms values are <10ms,60ms> and using lower values will not work. >> 80 means a hardware interrupt is received every 10ms with 80 bytes per >> time slot. This is the recommended mode. A value of 40 will increase >> interrupt load and not necesarily reduce your latency, you must reduce >> the "user period", which is how often the driver will deliver >> media/data to the user application. This is done using >> sangoma_tdm_set_usr_period(). >> >> >> The codec_ms is used to call sangoma_tdm_set_usr_period(). This is how >> often the driver will deliver data to the user application (for >> example, waking it up from select()). >> In each of the the test below the codec_ms was set to 1 with hope of fastest data delivery, however this resulted to 20ms codec_ms which is default. > Please, have a look at the results with various parameters used: > mtu:80 txqueue_size=1 rxqueue_size=1 one-direction delay=60ms > round-trip delay=120ms > mtu:80 txqueue_size=2 rxqueue_size=2 one-direction delay=80ms > round-trip delay=160ms > mtu:80 txqueue_size=10 rxqueue_size=10 one-direction delay=240ms > round-trip delay=480ms > mtu:40 txqueue_size=1 rxqueue_size=1 one-direction delay=40ms > round-trip delay=80ms > mtu:40 txqueue_size=2 rxqueue_size=2 one-direction delay=60ms > round-trip delay=120ms > mtu:40 txqueue_size=5 rxqueue_size=5 one-direction delay=120ms > round-trip delay=240ms > mtu:16 txqueue_size=1 rxqueue_size=1 one-direction delay=30ms > round-trip delay=60ms > mtu:8 txqueue_size=1 rxqueue_size=1 one-direction delay=25ms > round-trip delay=50ms > mtu:8 txqueue_size=10 rxqueue_size=10 one-direction delay=205ms > round-trip delay=410ms > Updated test result with the codec_ms=10 is following: mtu:16 txqueue_size=1 rxqueue_size=10 one-direction delay=20ms round-trip delay=50ms mtu:80 txqueue_size=1 rxqueue_size=10 one-direction delay=56ms round-trip delay=110ms However, this is still not 10ms with the default MTU:80 and codec_ms:10 :( Anyway, is it a good idea to use so assymetric tx/rx queue sizes? with best regards Juraj

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