Hello,
I had a project wherein I had no microphone, but I did have an output device. Since you're targeting a platform running a Linux kernel, I think you can still try using the snd-dummy kernel driver. This should give you a virtual sound device to make pjsua a little happier.
Regards,
Larry Ing
On Thu, Jul 23, 2020, 04:18 Kenneth Mathis <kenneth.mathis99@xxxxxxxxx> wrote:
_______________________________________________Hi everyoneSo, I am trying to create a sip client for an embedded device that has no audio capabilities.Therefore I am implementing a mem capture to a buffer for the audio data.This works so far on a host system but not on the embedded target system.Now, on the target system I'm stuck at the call disconnecting as soon as I pick up the phone.Sniffing the traffic and looking at the logs tells me that my programm disconnects after pickup. (Thus no network/pbx/codec problem I guess)The log points out this issue:pjsua_aud_channel_update() failed for call_id 0 media 0: Invalid operation (PJ_EINVALIDOP)I looked into this it and only found some mentions about missing libraries (https://stackoverflow.com/questions/20312927 Essentially tells me that portaudio is missing but I have it installed?)and the following unanswered post that somewhat describes my issue: https://stackoverflow.com/questions/53075903Also using endpoint.audDevManager().setNullDev(); or endpoint.audDevManager().setNoDev(); doesn't change the outcome.General information:PJ-Sip Version: 2.10My Code: https://pastebin.com/8VxVRFALCMakeLists.txt: https://pastebin.com/pWUcPUurLog File: https://pastebin.com/tTbkJQCpTarget Linux kernel version: 4.3Networking:Local network only, everything on a single switch, no firewallEmbedded Sip Program's Address: 172.28.178.19PBX Address: 172.28.176.10Telephone's Address: 172.28.178.2Note: For building the programm, I compiled PJ-Sip on the target and copied its shared object files over to the host system in order to link them.Not the best strategy but it appears to work as I couldn't cross compile the library.I also looked into creating a null sound device on the os but it seems far more complex than what is probably required.Would appreciate any help I can get to solve this problem.Thanks and best regardsKenneth Mathis
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