Re: [Opalvoip-user] Restrict devices before opening OPAL?
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Re: [Opalvoip-user] Restrict devices before opening OPAL?
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From: Robert J. <ro...@vo...> - 2015-02-20 01:02:14
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OK, hard to find the problem when not exhibited. Oh well, works for you
now, I suppose.
Some notes on OpalInitialise, having had a quick look at the code:
It only loads the audio and video plug ins. It should not open any, except
perhaps to determine if there are any devices available. I am not an expert
in the fine details of that part of the code.
The only reasons for OpalInitialise to return NULL are invalid arguments to
it, or there are no valid endpoints or "protocols" specified. Neither seems
to be the case in your initial code, so it is a complete mystery why it is
doing what you said it did.
Oh, final point, only having "sip" as an endpoint might not work. You would
need to indicate what the SIP connections are connecting to,
e.g. OPAL_PREFIX_PCSS. As it is, I think you would only be able to make
B2BUA calls.
Robert Jongbloed
*OPAL/OpenH323/PTLib Architect and Co-founder*.
On 20 February 2015 at 11:43, jeremy ardley <jer...@gm...> wrote:
> I am unable to replicate exactly the behaviour I experienced earlier.
> Previously the code attempted to open the V4L device and aborted when it
> was not found.
>
> The difference now is I have installed a bunch of V4L dev packages on my
> Wheezy system and plugged in and then removed a video device.
>
> Now it searches for the v4L device but does not abort when it doesn't find
> one. I also rebooted to clear any remnant device information.
>
> This is the present log. You can see the code is hard wired to find a v4L
> device early on in the piece. It doesn't mention searching for or opening
> other plug-in devices including ALSA. It mentions the other devices
> including ALSA later on after I start the shutdown.
>
> My program opens OPAL using SIP transport only, prints "hello world", and
> then shuts the system down and exits (I'm actually looking at the
> feasibility of converting a much larger application from a different TAPI
> to OPAL - this is just an experiment to get used to OPAL.)
>
>
> Starting: /home/jeremy/Projects/pirad/build/pirad
> 0:00.545 Version 1.0.1 by on Unix
> Linux (3.2.0-4-amd64-x86_64) with PTLib (v2.10.4 (svn:26606)) at 2015/2/20
> 8:26:18.957
> 0:00.545 OpalC Start Up, OPAL version
> 3.10.4 (svn:26616)
> 0:00.545 Detecting V4L2 devices
> 0:00.545 Unable to detect v4l2 directory
> 0:00.548 PWLib File handle high water
> mark set: 7 Thread unblock pipe
> 0:00.548 PTLib Thread high water mark
> set: 2
> 0:00.548 OpalMan Created manager.
> 0:00.549 OpalMan Attached endpoint with
> prefix sip
> 0:00.549 OpalEP Created endpoint: sip
> 0:00.549 PWLib File handle high water
> mark set: 8 PUDPSocket
> 0:00.549 IfaceMon Initial interface
> list:
> 127.0.0.1 <00-00-00-00-00-00> (lo)
> 203.31.40.68 <C8-60-00-9D-73-1D> (eth0)
> 192.168.100.67 <C8-60-00-9D-73-1D> (eth0:0)
> 192.168.0.9 <C8-60-00-9D-73-1D> (eth0:1)
> fe80::ca60:ff:fe9d:731d <C8-60-00-9D-73-1D> (eth0)
> ::1 <00-00-00-00-00-00> (lo)
>
> 0:00.549 PTLIB Opened NetLink socket
> 0:00.549 PWLib File handle high water
> mark set: 18 Thread unblock pipe
> 0:00.549 PTLib Thread high water mark
> set: 3
> 0:00.549 PWLib File handle high water
> mark set: 20 Thread unblock pipe
> 0:00.549 PTLib No permission to set
> priority level 4
> 0:00.549 PTLib Thread high water mark
> set: 4
> 0:00.549 Network In...0xa93a0700 IfaceMon Started interface
> monitor thread.
> 0:00.550 OpalMan Attached endpoint with
> prefix sips
> 0:00.550 SIP Created endpoint.
> 0:00.550 OpalMan Added route "sip:.*="
> Hello, world!
> 0:00.550 OpalMan Shutting down
> endpoints.
> 0:00.550 OpalMan Clearing all calls and
> waiting, primary thread.
> 0:02.549 OpalMan All calls cleared.
> 0:02.549 SIP Shutting down.
> 0:02.649 OpalEP sip endpoint shutting
> down.
> 0:02.649 IfaceMon Awaiting thread
> termination
> 0:02.649 Network In...0xa93a0700 IfaceMon Finished interface
> monitor thread.
> 0:02.649 Network In...0xa93a0700 PWLib File handle high water
> mark set: 21 PTextFile
> 0:02.650 Network In...0xa93a0700 PTLib Thread ended:
> name="Network Interface Monitor:0xa93a0700", real=2.100, kernel=0.000 (0%),
> user=0.000 (0%), both=0.000 (0%)
> 0:02.680 OpalEP sip endpoint destroyed.
> 0:02.680 OpalMan Shutting down
> endpoints.
> 0:02.680 OpalMan Clearing all calls and
> waiting, primary thread.
> 0:03.549 OpalMan All calls cleared.
> 0:03.549 Opal Garbage:0xa93e1700 PWLib File handle low water
> mark set: 8 PTextFile
> 0:03.549 Opal Garbage:0xa93e1700 PTLib Thread ended: name="Opal
> Garbage:0xa93e1700", real=3.001, kernel=0.000 (0%), user=0.000 (0%),
> both=0.000 (0%)
> 0:03.559 OpalMan Deleted manager.
> 0:03.560 OpalC Shut Down.
> 0:03.560 OpalPlugin Using default
> handler for plugin codec lpc10_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec g726_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec silk_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec gsmamrcodec_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec g7222_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec g722_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec ima_adpcm_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec g7221_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec gsm0610_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec speex_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec mpeg4_ffmpeg_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec theora_ptplugin
> 0:03.560 OpalPlugin Using default
> handler for plugin codec h261_vic_ptplugin
> 0:03.561 OpalPlugin Using default
> handler for plugin codec h263_ffmpeg_ptplugin
> 0:03.561 OpalPlugin Using default
> handler for plugin codec spandsp_ptplugin
> 0:03.561 UDLL Closing
> /usr/lib/opal-3.10.4/fax/spandsp_ptplugin.so
> 0:03.561 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/video/h263_ffmpeg_ptplugin.so
> 0:03.561 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/video/h261_vic_ptplugin.so
> 0:03.561 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/video/theora_ptplugin.so
> 0:03.561 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/video/mpeg4_ffmpeg_ptplugin.so
> 0:03.562 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/speex_ptplugin.so
> 0:03.562 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/gsm0610_ptplugin.so
> 0:03.562 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/g7221_ptplugin.so
> 0:03.562 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/ima_adpcm_ptplugin.so
> 0:03.562 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/g722_ptplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/g7222_ptplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/gsmamrcodec_ptplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/silk_ptplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/g726_ptplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/opal-3.10.4/codecs/audio/lpc10_ptplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/ptlib-2.10.4/devices/sound/pulse_pwplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/ptlib-2.10.4/devices/sound/alsa_pwplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/ptlib-2.10.4/devices/sound/oss_pwplugin.so
> 0:03.563 UDLL Closing
> /usr/lib/ptlib-2.10.4/devices/videoinput/v4l2_pwplugin.so
> 0:13.560 Housekeeper:0xa935f700 PWLib File handle low water
> mark set: 6 PTextFile
> 0:13.560 Housekeeper:0xa935f700 PTLib Thread ended:
> name="Housekeeper:0xa935f700", real=13.011, kernel=0.000 (0%), user=0.000
> (0%), both=0.000 (0%)
> *** Exited normally ***
>
>
>
>
>
> On 20/02/15 07:37, Robert Jongbloed wrote:
>
> I am bit confused by your requirement, as V4L is video and ALSA is audio,
> they are not interchangeable!
>
> There is nothing to be called before OpalInitialise() it is the first
> function you call.
>
> I do not understand why not having a V4L device causes OpalInitialise to
> return NULL. It should not care. Can you provide the trace log?
>
>
>
> Robert Jongbloed
> *OPAL/OpenH323/PTLib Architect and Co-founder*.
>
> On 19 February 2015 at 16:01, jeremy ardley <jer...@gm...>
> wrote:
>
>> I use a small snippet of code to open the OPAL device in a SIP voice
>> application
>>
>> OpalHandle hOPAL;
>>
>> unsigned version;
>>
>> version = OPAL_C_API_VERSION;
>>
>> if ((hOPAL = OpalInitialise(&version, OPAL_PREFIX_SIP " TraceLevel=4"))
>> == NULL)
>>
>> {
>>
>> fputs("Could not initialise OPAL\n", stderr);
>>
>> return false;
>>
>> }
>>
>> However the OPAL instance wants to open a V4L2 device and fails since I
>> don't have one.
>>
>> Can I prevent the OPAL instance from trying to open a V4L device and
>> instead open an ALSA device?
>>
>> What calls prior to the OplaInitialise are required? Or is using the
>> wrapper functions not suitable for this and I should use low level
>> calls? Or does it require compile time switches? In all cases is there a
>> link or tutorial I can use?
>>
>> I did searches on the error message phrase and not found much of use
>> other than similar messages from apps using OPAL. I also looked through
>> the doxygen documentation but it's a bit obscure about this. I also
>> installed a 4VL device and got it to work O.K. but my target application
>> won't have V4L.
>>
>> Any advice appreciated.
>>
>>
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>> Opa...@li...
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>>
>
>
>
>
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