[alsa-devel] Application and hw mixing for VoIP
Hi, I need some help please. I have an application that does VoIP and use OSS emulated interface.
I want to : - send through VoIP application a mixed sound from mic and an another application (aplay should be ok for testing).
mic -----------------> mix ---- oss emulation -----> voip application application 1 -------> (aplay)
- use sound received from VoIP with HP output and an another application (arecord should be ok for testing).
---------> application 2 (arecord) voip application ----- oss emulation ----> copy ---------> HP output
I tried a lot of asoundrc but they doesn't work. Every try I did, Dsnoop cannot mix sound for application 1 and copy is already in use.
Could someone help me ?
# wm8731 is the name of my hardware codec pcm_slave.wm8731 { type hw card 0 device 0 }
pcm.from_voip { ipc_key 1025 type dmix slave.pcm wm8731 }
#one called "to_voip" for capturing pcm.to_voip { ipc_key 1027 type dsnoop slave.pcm wm8731 }
#and this is the real magic pcm.temp_voip { type asym playback.pcm "from_voip" capture.pcm "to_voip" }
#a quick plug plugin for above device to do the converting magic pcm.voip { type plug slave.pcm "temp_voip" }
#a ctl device to keep xmms happy ctl.voip { type hw card 0 }
#for aoss: pcm.dsp0 { type plug slave.pcm "voip" }
ctl.mixer0 { type hw card 0 }
pcm.from_voip_copy { type plug slave from_voip route_policy copy }
Thank you.
Fabien
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Fabien COMTE