[wdmaudiodev] Re: Obtaining unique identifier of Filter from its DispatchRoutines
- From: swapnil kamble <swap.kamble@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Thu, 19 Feb 2009 10:38:33 +0530
Thanks Jeff and Tim. I got it.
On Thu, Feb 19, 2009 at 8:23 AM, Jeff Pages <jeff@xxxxxxxxxxxxxxxx> wrote:
> Hi Swapnil,
>>
>> You can use the FileObject on the IrpStack to identify which subdevice
>> it's referring to. The field pIrpStack->FileObject->FileName will contain
>> the name of your subdevice (eg. WAVE1).
>>
>> Jeff
>>
>
> I should add that the FileName field is only present in an IRP_MJ_CREATE
> IRP, so you will need to save the actual FILE_OBJECT pointer in your Create
> handler and compare that against the FILE_OBJECT pointer in other IRPs to
> see if they relate to the same subdevice.
>
>
> Jeff
>
>
>
>
>
>
>
>
>> ----- Original Message ----- From: swapnil kamble
>> To: wdmaudiodev@xxxxxxxxxxxxx
>> Sent: Wednesday, February 18, 2009 11:30 PM
>> Subject: [wdmaudiodev] Obtaining unique identifier of Filter from its
>> DispatchRoutines
>>
>>
>> Hi All,
>> I have created multiple instances of my Filter Centric AVStream
>> driver by using a call KsCreateFilterFactory (), in which I give RefString
>> name which matches with "wave name" in INF, and FilterDescriptor table,
>> which contains functions pointers related with Filter. Currently I am using
>> DispatchCreate and DispatchProcess.
>>
>> What I want is, whenever any of Dispatch Routine related to that filter is
>> called, I want to know, which filter is responsible or associated with this
>> call.
>>
>> Lets say I have 2 filters name VAD1,VAD2 with wave name WAVE1,WAVE2. I
>> want to get either of these identifier from its DispatchRoutines to identify
>> the filter correctly.
>>
>> Thanks and Regards,
>> --
>> ...Swapnil
>>
>> || Hare Krishna Hare Krishna Krishna Krishna Hare Hare ||
>> || Hare Rama Hare Rama Rama Rama Hare Hare ||
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--
...Swapnil
|| Hare Krishna Hare Krishna Krishna Krishna Hare Hare ||
|| Hare Rama Hare Rama Rama Rama Hare Hare ||
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