[arm-allstar] simultaneous asterisk and direwolf possible?

[Tony]

Thanks Doug, the named pipe for direwolf usage was successfully created 
by placing "outstreamcmd=/usr/local/bin/nptee,dw" at the top of the 
main-node stanza in /etc/asterisk/rpt.conf and restarting asterisk:

[root at yellow ~]# ls -l /tmp/outsound/dw
prw-r--r-- 1 root root 0 Apr  5 16:38 /tmp/outsound/dw

I guess I'll have to study carefully both the lame and direwolf 
invocations to see what the next problems are:

[root at yellow ~]# lame --preset cbr 16 -r -m m -s 8 --bitwidth 16 
/tmp/outsound/dw - 2>/tmp/status | direwolf -t 0 -
Dire Wolf version 1.5
...
Reading config file direwolf.conf
Audio input device for receive: stdin  (channel 0)
Audio out device for transmit: default  (channel 0)
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
Could not open audio device default for output
Device or resource busy
Pointless to continue without audio device.


On 4/5/20 3:35 PM, "Doug Crompton via ARM-allstar" wrote:
> A couple of thoughts....
>
> You could archive the audio and play it back to direwolf.... Don't archive
> to the SD card.  Use a USB stick or do it to RAM,
>
> archivedir=/media/MS1
> archiveaudio=1          ; Saving .wav files
>
> You could use nptee to stream the audio to the other device....
>
> https://www2.hamvoip.org/nptee_howto.pdf
>
> *73 Doug, WA3DSP*
> *http://wa3dsp.org <http://wa3dsp.org>*
>
>
> On Sun, Apr 5, 2020 at 6:25 PM "Tony via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
>> My hamvoip node is often connected to an ASL hub node on a large network
>> of linked repeaters. Occasionally, we all hear what sound like APRS
>> beacons, as they occur regularly every 10 or 15 minutes. The idea occurs
>> to me to use "direwolf" to decode these beacons, so that the responsible
>> operator can be alerted to their error of beaconing on a linked network
>> of FM repeaters.
>>
>> The initial problem occurs as an inability to share the USB sound card
>> audio:
>>
>> [root at yellow ~]# aplay -l
>> **** List of PLAYBACK Hardware Devices ****
>> card 0: Device [USB Audio Device], device 0: USB Audio [USB Audio]
>>     Subdevices: 0/1
>>     Subdevice #0: subdevice #0
>>
>> [root at yellow ~]# grep -E "^ADEVICE|^ACHANNELS" direwolf.conf
>> ADEVICE plughw:0,0 -
>> ACHANNELS 1
>>
>> [root at yellow ~]# direwolf -t 0
>> Dire Wolf version 1.5
>> ...
>> Reading config file direwolf.conf
>> Audio device for both receive and transmit: plughw:0,0  (channel 0)
>> Could not open audio device plughw:0,0 for input
>> Device or resource busy
>> Pointless to continue without audio device.
>>
>> This occurs even if /run/lock/asound.state.lock and its symlink
>> /var/lock/asound.state.lock are rm'd. It runs properly if asterisk isn't
>> running, but then the ASL audio stream containing the APRS isn't available:
>>
>> [root at yellow ~]# astdn.sh && direwolf -t 0
>> Stopping Asterisk...
>> Asterisk ended with exit status 0
>> Asterisk shutdown normally.
>> Dire Wolf version 1.5
>> ...
>> Reading config file direwolf.conf
>> Audio device for both receive and transmit: plughw:0,0  (channel 0)
>> Channel 0: 1200 baud, AFSK 1200 & 2200 Hz, E+, 44100 sample rate / 3,
>> DTMF decoder enabled.
>> Ready to accept AGW client application 0 on port 8000 ...
>> Ready to accept KISS TCP client application 0 on port 8001 ...
>>
>> Is there some way to get both asterisk and direwolf listening to the
>> same audio stream? Or must I use a USB RTL-SDR stream listening on the
>> simplex node radio frequency and decode the APRS from among that audio
>> stream?
>> _______________________________________________
>>
>> ARM-allstar mailing list
>> ARM-allstar at hamvoip.org
>> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
>>
>> Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
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>
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>
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