[wdmaudiodev] Re: Obtaining unique identifier of Filter from its DispatchRoutines
- From: swapnil kamble <swap.kamble@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Thu, 19 Feb 2009 11:57:01 +0530
I got the wave name of filter from Filter's dispatch routines. But can I get
this name from Pin's Dispatch routines too, like PinDispatchSetState or
PinDispatchCreate. Here I tried using obtained IRP from Pin's Dispatch
function but that FileObject's FileName gives some GUID like this way,
{146F1A80-4791-11D0-A5D6-28DB04C10000}\???????. Instead, I want Wave name of
Filter to which this Pin belongs.
Thanks and Regards,
Swapnil
On Thu, Feb 19, 2009 at 10:38 AM, swapnil kamble <swap.kamble@xxxxxxxxx>wrote:
> 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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>> ******************
>>
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>
>
> --
> ...Swapnil
>
> || Hare Krishna Hare Krishna Krishna Krishna Hare Hare ||
> || Hare Rama Hare Rama Rama Rama Hare Hare ||
>
--
...Swapnil
|| Hare Krishna Hare Krishna Krishna Krishna Hare Hare ||
|| Hare Rama Hare Rama Rama Rama Hare Hare ||
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