[wdmaudiodev] Re: waveInGetPosition support in driver
- From: Hugo Villeneuve <hvilleneuve@xxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 26 Jan 2005 11:03:03 -0500
Matt Gonzalez <matt@xxxxxxxxxxxxx> wrote:
> Sounds like you need to add support for KSPROPERTY_AUDIO_POSITION on
> your pin.
>
> Matt
>
> Hugo Villeneuve wrote:
>
> >Hi,
> >
> > I'm totally new to WDM driver developement. I have a fully functional
> > AVStream driver for our hardware that was developped for us, and we access
> > it through the waveform API. The only thing missing is support for the
> > function waveInGetPosition(). How do I register/add this functionality in
> > my driver?
> >
> > Hugo Villeneuve
Thank-you, I added the KSPROPERTY_AUDIO_POSITION to the sink pin of my
capture driver and it works fine!
Here is how I did it for reference:
---------------------------------------------------------------------------------------------------------------------------
// ******************************
// * AUDIO_POSITION pin property
// ******************************
#define DEFINE_KSPROPERTY_CLFW_AUDIO_POSITION( GetHandler, SetHandler )\
DEFINE_KSPROPERTY_ITEM(\
KSPROPERTY_AUDIO_POSITION,\
(GetHandler),\
sizeof( KSPROPERTY ),\
sizeof( ULONG ),\
(SetHandler),\
NULL,\
0,\
NULL,\
NULL,\
0 )
DEFINE_KSPROPERTY_TABLE( ksCapturePositionAudioPropertyItems )
{
// GetCapturePosition is the callback function for GET
DEFINE_KSPROPERTY_CLFW_AUDIO_POSITION( GetCapturePosition, NULL )
};
DEFINE_KSPROPERTY_SET_TABLE( ksCapturePosition_psTable )
{
DEFINE_KSPROPERTY_SET(
&KSPROPSETID_Audio,
SIZEOF_ARRAY( ksCapturePositionAudioPropertyItems ),
const_cast< PKSPROPERTY_ITEM >(ksCapturePositionAudioPropertyItems ),
0,
NULL )
};
DEFINE_KSAUTOMATION_TABLE( ksCapturePosition_autTable )
{
DEFINE_KSAUTOMATION_PROPERTIES( ksCapturePosition_psTable ),
DEFINE_KSAUTOMATION_METHODS_NULL,
DEFINE_KSAUTOMATION_EVENTS_NULL
};
// *********************************
// * Filter Pins Descriptor
// *********************************
KSPIN_DESCRIPTOR_EX ksMergedPinDescriptors[4] =
{
//-----------------------PLAYBACK PINS------------------------
{
... Descriptor for playback sink pin ...
},
{
... Descriptor for playback output pin ...
},
//---------------CAPTURE PINS----------------------
// Descriptor for capture sink pin.
{
&ksCapturePinDispatch,
&ksCapturePosition_autTable,
{
0,
NULL,
0,
NULL,
SIZEOF_ARRAY(ksCaptureDataRanges),
ksCaptureDataRanges,
KSPIN_DATAFLOW_OUT,
KSPIN_COMMUNICATION_SINK,
&KSCATEGORY_AUDIO,
NULL,
0
},
KSPIN_FLAG_DO_NOT_INITIATE_PROCESSING,
1,
0,
NULL,
CapturePinDataIntersectionHandler
},
{
... Descriptor for capture bridge pin ...
}
};
--
------------------------------------
Hugo Villeneuve
Concepteur de produits, matériel /
Product developer, hardware
CVDS Inc.
(514) 426-7879 ext.242
hvilleneuve@xxxxxxxx
www.cvds.com
------------------------------------
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