I use linkit7688 hardware and to build openwrt20.02.
I use https://github.com/redchenjs/mt762x-wm8960(772ae2d31d5df69994c170b8b05009f15ff3fac0) enable the linkit sound card. I test it working. but It's only support stereo. dont support mono. So, If I directly use chan_alsa open default. It's will fault. and openwrt20.02's /dev/snd/* in auduo group. asterisk can not visit them.
so, It has two problem.
- permission denied
- mono problem.
I reference two topic. I think they are usefully.
#[Asterisk chan_alsa: /dev/snd/ permission denied]https://forum.openwrt.org/t/asterisk-chan-alsa-dev-snd-permission-denied/51598
#[[solved] Asterisks locks alsa device if chan_alsa is loaded]https://forum.openwrt.org/t/solved-asterisks-locks-alsa-device-if-chan-alsa-is-loaded/32006
root@OpenWrt:~# chmod -R 777 /dev/snd/
root@OpenWrt:~# cat /etc/asound.conf
pcm.!dmix {
type dmix
ipc_key 1024
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
period_size 2048
buffer_size 16384
format S16_LE
rate 48000
}
}
pcm.!dsnoop {
type dsnoop
ipc_key 2048
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
period_size 2048
buffer_size 16384
format S16_LE
rate 4800
}
}
pcm.asymed {
type asym
playback.pcm "dmix"
capture.pcm "dsnoop"
}
pcm.!default {
type plug
slave.pcm "asymed"
}
pcm.dsp0 {
type plug
slave.pcm "asymed"
}
ctl.mixer0 {
type hw
card 0
}
I compile asterisk18 to openwrt 20.02. and pjsip working normal. and make modify for alsa. module load chan_alsa.so no warning message. maybe they are right.
but, when I call chan_alsa, asterisk server exited.
root@OpenWrt:/etc# /etc/init.d/asterisk restart
Command failed: Not found
root@OpenWrt:/etc# asterisk -dddddvvvvr
Seeding global EID '0c:cf:89:23:f7:55' from 'br-lan' using 'siocgifhwaddr'
Parsing /etc/asterisk/asterisk.conf
Asterisk 18.2.2, Copyright (C) 1999 - 2018, Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
=========================================================================
Connected to Asterisk 18.2.2 currently running on OpenWrt (pid = 4734)
Core debug was OFF and is now 5.
OpenWrt*CLI> module load chan_alsa.so
Loaded chan_alsa.so
== Registered channel type 'Console' (ALSA Console Channel Driver)
Loaded chan_alsa.so => (ALSA Console Channel Driver)
[Apr 28 06:46:44] ERROR[4784]: netsock2.c:303 ast_sockaddr_resolve: getaddrinfo("OpenWrt", "(null)", ...): Name does not resolve
[Apr 28 06:46:44] WARNING[4784]: acl.c:890 resolve_first: Unable to lookup 'OpenWrt'
-- Executing [9000@from-internal:1] Dial("PJSIP/6001-00000000", "Console/Alsa,30") in new stack
<< Call placed to 'Alsa' on console >>
<< Auto-answered >>
-- Called Console/Alsa
-- ALSA/default answered PJSIP/6001-00000000
> 0x10e1a60 -- Strict RTP learning after remote address set to: 192.168.0.101:4016
-- Channel ALSA/default joined 'simple_bridge' basic-bridge <f95376f6-b54b-4f67-9875-e81d91d9f68b>
-- Channel PJSIP/6001-00000000 joined 'simple_bridge' basic-bridge <f95376f6-b54b-4f67-9875-e81d91d9f68b>
[Apr 28 06:46:44] WARNING[4806][C-00000001]: chan_alsa.c:571 alsa_indicate: Don't know how to display condition 26 on ALSA/default
[Apr 28 06:46:44] WARNING[4806][C-00000001]: chan_alsa.c:571 alsa_indicate: Don't know how to display condition 26 on ALSA/default
> 0x10e1a60 -- Strict RTP switching to RTP target address 192.168.0.101:4016 as source
OpenWrt*CLI>
Disconnected from Asterisk server
Asterisk cleanly ending (0).
Executing last minute cleanups
Asterisk ending (0).
root@OpenWrt:/etc#
they have [Apr 28 06:46:44] WARNING[4806][C-00000001]: chan_alsa.c:571 alsa_indicate: Don't know how to display condition 26 on ALSA/default message. I know before application, I get this message too. but asterisk still working. but it's exit now. I think it's still alsa problem. I will how to modify them?