[wdmaudiodev] Re: - How to capture HDMI audio output data? Whether is sAPO a choice for it?
- From: Jun Jiang <jun.jiang77@xxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 21 Oct 2011 04:54:07 +0000
Hi Tim, Thank you very much. Yes, the latency is a question. Now I need to
find a way to capture HDMI audio output data firstly and check latency
later.For my case, I use a 3rd part application and this application can trun
off Microsoft AEC.Actually, I want to find a way to disable Microsoft AEC, such
as set key in Register. But I does not find it now. Could somebody show
suggetion on it? Could you please check my following questions about APO?Thanks
in advnace. I found your previous post,
http://www.winvistatips.com/system-wide-audio-filter-driver-t819251.html, about
APO.You said that APO is the extension of hardware and it should co-work with
hardware together.I just want to know if it is possible to make a APO to attach
to other hardware driver, such as my case, to attcah to Intel Display Audio
driver to capture output audio data? Or to attach to some system level to
capture audio output data?Or whether can I make the global APO to capture all
possible audio output data
? My another question: Is APO not recommended to do it or APO impossible to
do it? Many thanks,Audleyswood
Date: Thu, 20 Oct 2011 14:19:56 -0700
From: timr@xxxxxxxxx
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: - How to capture HDMI audio output data? Whether is
sAPO a choice for it?
Jun Jiang wrote:
My question: How to capture HDMI audio output data? Whether is
sAPO a choice for it?
I need the speaker data to do AEC.
In my Windows 7 x64 PC, the audio output data was sent to HDMI
speaker. The HDMI audio driver is Intel Display Audio driver.
Whether is sAPO a choice to capture HDMI audio data? Here, I can
not change anying about HDMI audio driver because it is Intel
driver not ours.
I am newie on sAPO. Could somebody show me suggestions?
If sAPO is not good choice to capture HDMI audio data, How can I
do? Is there anohter way to do it?
What you're asking is not easy. You can use a user-mode
application to hook into the loopback feature of the audio renderer
to get that data, but you still need to have a place to feed that
back in to your AEC algorithm, and you need rather precise latency
information as well.
One of the unfortunate things is that Microsoft already has an AEC
solution. It's clear there are a number of companies who have
invested many years of research into AEC algorithms, who do not
trust the Microsoft code. If there were a nice plug-in interface to
replace the core algorithms but leave the plumbing in place, it
would be a great tool.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
Other related posts:
