[wdmaudiodev] Re: Is there a way to list all supported format of an audio device

  • From: Tim Roberts <timr@xxxxxxxxx>
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Fri, 16 Aug 2013 16:44:44 -0700

Andrew Sha...... wrote:
> Hardware-Offloaded Audio Processing
> http://msdn.microsoft.com/en-us/library/windows/hardware/dn302038(v=vs.85).aspx
> <http://msdn.microsoft.com/en-us/library/windows/hardware/dn302038%28v=vs.85%29.aspx>
> So how to discover offloaded formats?

There are some fascinating things on that page.  This paragraph near the
bottom stands out:

    The functionality described for this new type of audio adapter and
    its associated driver, can be used by Windows Store apps via WASAPI,
    Media Foundation, Media Engine, or the HTML 5 <audio> tags. Note
    that Wave and DSound cannot be used, as they are not available to
    Windows Store apps. Also note that Classic Win32 applications cannot
    use adapters that are capable of processing hardware-offloaded audio.

How can there possibly be a feature set that is available to Windows
Store applications, but NOT to Win32 applications?  Win32 applications
can access WASAPI and Media Foundation just fine.

Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.

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