Re: how to add a DirectShow filter in a driver package

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No, there is no documented way of building a filter driver over KS based
minidriver.

-- Max.



"JC" <julia_vid@xxxxxxxxx> wrote in message
news:u9jfaampFHA.1412@xxxxxxxxxxxxxxxxxxxxxxx
> Thank you Max,
>
> I understand your answer after reading more.
> Now, how about making an " WDM USB Video Streaming Filter Driver"? Is that
> possible to build it on top of the existing camera driver. Use it as an
> upper filter or just a filter that can transform video data? How much
> details I have to know from the existing camera driver?
>
> Please give me your suggestion or hint or idea. Thanks ahead again!
>
> Julia
>
> "Max Paklin" <mpaklin@xxxxxxxxxxx> wrote in message
> news:%23hooLFRpFHA.2952@xxxxxxxxxxxxxxxxxxxxxxx
>> If I understand correctly what you are trying to do, then no, you can't
>> do that.
>>
>> DShow filter is a user-mode component. The phrase "upper filter" doesn't
>> apply to it (this is all on top of the fact that implementing filter
>> driver for KS driver is not officially supported).
>>
>> If you want to have your DShow filter automatically attach to an abitrary
>> camera driver as a downstream filter to do postprocessing, then also no,
>> you can't do that unless you control either driver or an application.
>>
>> -- Max.
>>
>>
>>
>> "JC" <julia_vid@xxxxxxxxx> wrote in message
>> news:uuPuHCNpFHA.3004@xxxxxxxxxxxxxxxxxxxxxxx
>>>I want to add a DirectShow filter as an upper filter to a camera WDM
>>>device driver. In the DirectShow filter, I can add some process to the
>>>video data. That way, once the driver is installed, user can use any
>>>viewer to get the processed video.
>>>
>>> Please give me some hint. Thank you all ahead!
>>>
>>> Julia
>>>
>>
>>
>
>


.

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