[wdmaudiodev] Re: MSVAD as capture device

  • From: Michail Nikolaev <michail.nikolaev@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Mon, 15 Feb 2010 13:05:12 +0200


2010/2/15 Ahmed Osama <wiseman_tm@xxxxxxxxx>

> I want to change MSVAD(simple) code to use it as virtual capture device, I
> just need to copy the buffer I recieve inside CopyTo , to an application
> that selects MSVAD as capture device, simply whatever you render on MSVAD
> can be seen as Capture , I tried in many ways as follows:
> 1- I keep a copy from the source buffer recieved in CopyTo in a FIFO
> buffer.
> 2- when CopyFrom is called I try to overwrite the m_pvDmaBuffer  using
> RtlCopyMemory , the problem is that the buffer never changes it's contents
> all the sound I get from Windows sound recorder is (sha...sha...sha) like
> sound more like garbage data.
> 3- I tried changing the returned address in
> CMiniportWaveCyclicStreamMSVAD::PhysicalAddress to point to my FIFO buffer ,
> but still not working.
> 4- in AllocateBuffer I tried to fill m_pvDmaBuffer with ZERO so I won't get
> any sound but again nothing happens.
> Note: in CopyTo the ByteCount is 840 bytes , while in CopyFrom it's 48
> bytes , I can't change that behavior also to make the buffers match?
> I'v been working for nearly a month now and can't find any information to
> help me , it's very urgent Please help me.
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