[wdmaudiodev] Re: help with virtual audio driver.

  • From: "Muhammad Raza Saeed" <raza@xxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Wed, 12 May 2004 11:33:31 +0100

Yes if you write a filter driver , it will be be in between dsound/wavout
and the output device. The thing is i havent done implementation of this
myself ... but i m interested in pursuing it.

Regards
Raza





----- Original Message -----
From: <admin@xxxxxxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Wednesday, May 12, 2004 2:43 AM
Subject: [wdmaudiodev] Re: help with virtual audio driver.


> Hi, Raza:
>
> Mainly I want to capture and have a chance to modify the audio data to
(and from) the card.
> I think the filter may be solution if it is between the dsound/waveout and
the output sound device.
>
> I really appreciate if you can help.
>
>
>
>
>
>
>
> > Hi,
> > I had the same issue at hand a little while ago and i wrote to a company
who
> > just writes DirectShow filters, they responded by sayin that this cannot
be
> > done using DirectShow filters and then i found out i need to write a
upper
> > filter for audio.sys. I am not pursuing this project anymore but just
> > letting u know of my findings which will speed up ur decision making.
> > Let me know if u need further help.
> > btw i m still interested in coding it , if u agree we can do it together
.
> >
> > Regards
> > Raza
> >
> >
> >
> > ----- Original Message -----
> > From: "Tim Roberts" <timr@xxxxxxxxx>
> > To: <wdmaudiodev@xxxxxxxxxxxxx>
> > Sent: Tuesday, May 11, 2004 5:50 PM
> > Subject: [wdmaudiodev] Re: help with virtual audio driver.
> >
> >
> >> admin@xxxxxxxxxxxxxxxxx wrote:
> >>
> >> >Thanks for the reply.
> >> >
> >> >Actually
> >> >I want to make it a virtual audio driver. It don't need a specific
> > hardware. It uses the sound
> >> >card to play or record. But it acts like a true audio device there. So
> > apps that use it can work
> >> >normally, but I can have control on the data stream in this driver
now.
> >> >
> >> >I have looked at MSVAD driver in WINXP DDK. It writes the data to
disk. I
> > wonder how to send the
> >> >data to another true sourd device at the same time.
> >> >
> >> >
> >>
> >> I don't think you really want a driver. You want a filter. You can do
> >> all of this in user mode by writing a DirectShow filter.
> >>
> >> --
> >> - Tim Roberts, timr@xxxxxxxxx
> >>   Providenza & Boekelheide, Inc.
> >>
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