[arm-allstar] simultaneous asterisk and direwolf possible?

[Al Beard]

Hi,

I've added to /etc/asound.conf on my Pi4B here with HamVOIP and a
SoundBlaster Play 3! USB device here and tested with:
arecord -D custom_snoop_hw0
successfully.

I'd be cautious about using FIFOs in case one reading process stopped
and the filesystem filled up.

pcm.custom_snoop_hw0 {
    type dsnoop
    ipc_key 420042     
    ipc_key_add_uid 1
    slave {
        pcm "hw:0,0"   # the actual device
        format S16_LE
        channels 2
        rate 44100
    }
}

Alan VK2ZIW

On Sun, 5 Apr 2020 17:47:20 -0700, \"Tony via ARM-allstar\" wrote
> 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
> > _______________________________________________
> >
> > 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
> 
> _______________________________________________
> 
> ARM-allstar mailing list
> ARM-allstar at hamvoip.org
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> 
> Visit the BBB and RPi2/3/4 web page - http://hamvoip.org


---------------------------------------------------
Alan Beard

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