[wdmaudiodev] Re: Dynamic Audio Subdevices
- From: Robert Bielik <robert.bielik@xxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Thu, 18 Nov 2010 11:01:51 +0100
uwekirst skrev 2010-11-18 10:54:
> I'm using the irp parameter of my device ioctl funktion which triggers the
> Registering of the subdevices. Don't know whether this is important or not,
I'm planning on implementing this too, a question: Which handle are you using
to send the device IOCTLs ? The handles I can get to are the handles
of the miniports, but at the point when I need to add a subdevice again (i.e.
miniport) I have no available handle to the device. Or do I ?
/Rob
>
> /Uwe
>
>
> Am 18.11.2010 10:06, schrieb Dang XiaoHui:
>> thanks for reply.
>>
>> when the device reconnected, I just simply call the
>> StartDevice(DeviceObject, NULL, NULL) with Irp=Null, and ResourceList=NULL .
>> (StartDevice will call InstallSubdevice to create miniport )
>>
>> but the device in control panel > audio > play didn't show up as expected.
>> What else should be done?
>>
>>
>>
>> 2010/11/18 uwekirst <u.kirst@xxxxxx <mailto:u.kirst@xxxxxx>>
>>
>> Hello Danny,
>>
>> I'm calling InstallSubdevice (look at one of the DDK examples), which
>> creates the miniport.
>>
>> /Uwe
>>
>>
>> Am 18.11.2010 07:53, schrieb Dang XiaoHui:
>>
>> Hello,
>>
>> I'm working on a sound driver based on MSVAD simple for Win7.
>> The two filter is WaveCylic and Topology.
>>
>> During the first time the device is been emulated by os, StartDevice
>> will 1)install MSVAD topology miniport. 2)install MSVAD wavecyclic miniport.
>> 3) RegisterPhysicalConnection between wavecyclic and topology.
>>
>> Since my driver can detect the physical connect and disconnect, I
>> want to notify OS that by unregister/register those miniport and connection.
>>
>> What I did is:
>> 1) save topology miniport and wavecyclic pointer to Device extension.
>> 2) during disconnect: use the pointer saved in Device extension To
>> unregister topology-> wavecyclic->connection.
>> 3) during connect: use the pointer saved in Device extension To
>> register topology-> wavecyclic->connection
>>
>> the unregister works as expected. but after trying to re-register
>> those sub-device. I got the error similar to
>>
>> //www.freelists.org/post/wdmaudiodev/WDM-Audio-Subdevice-registration-and-unregistration
>>
>> STACK_TEXT:
>> 8364392c 927204e4 85f4ba10 85f9b548 86f90c20
>> portcls!CPortFilterTopology::Init+0x1e
>> 83643940 927203df 85f9b550 86f90c24 86f90c28
>> portcls!CPortTopology::NewIrpTarget+0x57
>> 83643988 9272031c 85f9b550 86915548 85fadc00
>> portcls!xDispatchCreate+0xba
>> 8364399c 9263aa9a 86915548 85fadc00 86915600
>> portcls!KsoDispatchCreate+0x17
>> 836439c0 92636778 86915548 00000000 836439ec ks!DispatchCreate+0xe0
>> 836439d0 9271fcd8 86915548 85fadc00 86915548 ks!KsDispatchIrp+0x9f
>> 836439ec 92724ff9 00000000 85fadc00 85f78610
>> portcls!DispatchCreate+0x4e
>> 83643a04 92725cc8 86915548 85fadc00 83643a70
>> portcls!KsoDispatchIrp+0x3b
>> 83643a14 8e5873d7 86915548 85fadc00 83643a7c
>> portcls!PcDispatchIrp+0x2d
>>
>> how can i re-register the subdevice like the Startdevice did? do I
>> need to re-create miniport again?
>> Thanks!
>>
>> sincerely
>>
>> --
>> Danny
>>
>>
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>>
>> --
>> 党晓辉
>
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