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Sample Interface for UVC Extension Units

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Important

The content and sample code in this topic is outdated and currently unsupported. It may not work with the current driver development toolchain.

This topic contains code for a sample interface.idl that you can use to support Extension Units.

// IExtensionUnit interface
import "unknwn.idl";
[
   object,
   local,
   uuid(yyyyyyyy-yyyy-yyyy-yyyy-yyyyyyyyyyyy),
   pointer_default(unique)
]
interface IExtensionUnit : IUnknown
{
   HRESULT get_InfoSize(
      [out] ULONG *pulSize);
   HRESULT get_Info(
      [in] ULONG ulSize,
      [in, out, size_is(ulSize)] BYTE pInfo[]);
   HRESULT get_PropertySize(
      [in] ULONG PropertyId,
      [out] ULONG *pulSize);
 HRESULT get_Property(
      [in] ULONG PropertyId,
      [in] ULONG ulSize,
      [in, out, size_is(ulSize)] BYTE pValue[]);
   HRESULT put_Property(
      [in] ULONG PropertyId,
      [in] ULONG ulSize,
      [in, out, size_is(ulSize)] BYTE pValue[]);
   HRESULT get_PropertyRange(
      [in] ULONG PropertyId,
      [in] ULONG ulSize,
      [in, out, size_is(ulSize)] BYTE pMin[],
      [in, out, size_is(ulSize)] BYTE pMax[],
      [in, out, size_is(ulSize)] BYTE pSteppingDelta[],
      [in, out, size_is(ulSize)] BYTE pDefault[]);
};