Streaming Driver for Windows NT4.0 to interface with DirectShow

[Ali]

Hi,

I'm looking at writing a streaming capture driver to interface to DirectShow
for Windows NT 4.0 but unfortunately all the documentation that I have read
indicate that streaming for DirectShow is not supported by NT 4.0 as the
Streaming Class is a WDM based driver.

Can anyone please give me some sort direction on how I would go about
writing this driver to interface with DirectShow for NT 4.0? Is this
possible?

Note: This was also posted on comp.os.ms-windows.programmer.drivers

--

Thanks
Ali

[Tim Roberts]

"Ali" <al...@paltronics.com.au> wrote:
>
>I'm looking at writing a streaming capture driver to interface to DirectShow
>for Windows NT 4.0 but unfortunately all the documentation that I have read
>indicate that streaming for DirectShow is not supported by NT 4.0 as the
>Streaming Class is a WDM based driver.

Correct. You cannot write a WDM streaming capture driver for NT 4.0.

>Can anyone please give me some sort direction on how I would go about
>writing this driver to interface with DirectShow for NT 4.0? Is this
>possible?

To write a capture driver for Windows NT 4.0, you need to write a Video For
Windows driver. There are examples in the NT DDK. Microsoft has a
VFW/DirectShow wrapper so that your driver can be used in DirectShow apps.

Unfortunately, it will be an orphan: you won't use it anywhere except on NT
4.0. The interface is different than a VFW driver on Win9X, and a
streaming driver is the way to go for Win2K.
--
- Tim Roberts, ti...@probo.com
Providenza & Boekelheide, Inc.

[Maxim S. Shatskih]

> To write a capture driver for Windows NT 4.0, you need to write a Video
For
> Windows driver. There are examples in the NT DDK. Microsoft has a

ActiveMovie is IIRC supported on NT4.
For ActiveMovie, you must write a user-mode COM DLL.

Max

[Tim Roberts]

No. Microsoft supplies a compatibility layer that lets
DirectShow/ActiveMovie apps capture with a Video For Windows driver.