[wdmaudiodev] Re: Other strangeness in PortCls and AudioDG
- From: Eugene Muzychenko <reg.wad@xxxxxxxxxxxxxx>
- To: Matthew van Eerde <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 6 Aug 2018 22:54:25 +0200
Hello Matthew,
_WITH_NOTIFICATION clients, including audiodg.exe in shared mode,
or audio applications in either exclusive mode or offload mode, need
to do the “alignment dance” to handle this problem.
But AudioDG does not perform such "dance". It simply returns an error
to MME clients who definitely know nothing about low-level alignment
requirements.
Also see the DEVPKEY_KsAudio_PacketSize_Constraints property and
KSAUDIO_PACKETSIZE_CONSTRAINTS2.
Packet size constraints were introduced in Win 10 but described
behavior is observed starting from Win 7.
Regards,
Eugene
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