Can you elaborate a little more on your scenario? The usual way to play Dolby
Digital audio in shared mode is to decode it first, then mix it with other
audio, and then play the result of the mix.
If you want multichannel and your output transport is rate-limited to the point
where it can stream compressed 5.1 but not uncompressed 5.1 (e.g. optical) then
the usual technique is to use an encoding EFX that accepts the uncompressed mix
and compresses it in real time.
From: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> on
behalf of Gregory House <drghouse221b@xxxxxxxxx>
Sent: Wednesday, January 23, 2019 7:57:41 AM
Subject: [wdmaudiodev] Rendering audio on a different device in kernel mode
I am working on a capture device that sends ac3 data to a rendering device. I
was hoping this can be done using the "playback through this device" option.
But I found that this connects to the endpoint in shared mode and sending ac3
requires exclusive mode. Is there anyway to gain exclusive access to a
rendering device from a kernel mode driver? I know how to render audio in user
mode using audioclient api. But is there something similar for kernel mode? Any
help would be appreciated!