WDM to WinCE porting

Discussion in 'Windows Vista Drivers' started by soorya, Mar 18, 2005.

  1. soorya

    soorya Guest

    Hi All,

    I have to port a WDM video capture driver to WinCE ...As you
    know WDM has got a stream class driver which will communicate to the
    undrlying miniport driver like tuner,decoder and crossbar...the problem i am
    facing is that WinCE doesnt have a video stream class driver and
    architectuers are also completely different ..here no irp's ,no dpc's ,even
    most of the API's used in WinCE is obsolete in WDM ...Is it advisable to try
    to make my own device specific IOCTL's,since i cannot go for the WDM
    specified IOCTL's ....or should i contact the chip manufacturer to get those
    IOCTL's...does anyone have any previous experience of porting WDM to
    WinCE....... i am at complete loss ......Any sort of useful suggestions
    higly appreciated ...dont tell me to ask in Platbuilder group ..i have tried
    several times but not much i got from there..

    Best Regards
    soorya, Mar 18, 2005
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  2. soorya

    Tim Roberts Guest

    Yes, one of the fun AND frustrating things about Windows CE is that the
    driver model is rather unspecific. You can basically do what you want,
    since interoperability is not a big concern.

    The FIRST thing you should do is check with the chip manufacturer to see if
    they have Windows CE support already. No sense reinventing the wheel if
    you don't have to.

    The one thing you DO have in the CE world is the familiarity of DirectShow.
    When I've been faced with a task like you described, I just tried to think
    of the driver as a DirectShow filter, or an extension of a DirectShow
    filter. Create a private API that fills in the holes in the DShow filter.

    (Actually, in our case, the client had decided to run apps in kernel mode,
    so the filter just did the I/O directly. Made things easier for me.)
    Tim Roberts, Mar 20, 2005
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  3. soorya

    soorya Guest

    thanx Tim for showing me a way ...will do, as u advised

    warm regards
    soorya, Mar 20, 2005
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