Exemplos de PKSPROPERTY_MEMBERSHEADER em C++ (Cpp)

Exemplo n.º 1

Arquivo: mintopo.cpp Projeto: duncanthrax/scream

//=============================================================================
NTSTATUS CMiniportTopology::PropertyHandlerBasicSupportVolume(IN PPCPROPERTY_REQUEST PropertyRequest)
/*++
Routine Description:
  Handles BasicSupport for Volume nodes.

Arguments:
  PropertyRequest - property request structure

Return Value:
  NT status code.
--*/
{
    PAGED_CODE();

    NTSTATUS ntStatus = STATUS_SUCCESS;
    ULONG    cbFullProperty = sizeof(KSPROPERTY_DESCRIPTION) + sizeof(KSPROPERTY_MEMBERSHEADER) + sizeof(KSPROPERTY_STEPPING_LONG);

    if (PropertyRequest->ValueSize >= (sizeof(KSPROPERTY_DESCRIPTION))) {
        PKSPROPERTY_DESCRIPTION PropDesc = PKSPROPERTY_DESCRIPTION(PropertyRequest->Value);
        PropDesc->AccessFlags       = KSPROPERTY_TYPE_ALL;
        PropDesc->DescriptionSize   = cbFullProperty;
        PropDesc->PropTypeSet.Set   = KSPROPTYPESETID_General;
        PropDesc->PropTypeSet.Id    = VT_I4;
        PropDesc->PropTypeSet.Flags = 0;
        PropDesc->MembersListCount  = 1;
        PropDesc->Reserved          = 0;

        // if return buffer can also hold a range description, return it too
        if(PropertyRequest->ValueSize >= cbFullProperty) {
            // fill in the members header
            PKSPROPERTY_MEMBERSHEADER Members = PKSPROPERTY_MEMBERSHEADER(PropDesc + 1);
            Members->MembersFlags   = KSPROPERTY_MEMBER_STEPPEDRANGES;
            Members->MembersSize    = sizeof(KSPROPERTY_STEPPING_LONG);
            Members->MembersCount   = 1;
            Members->Flags          = KSPROPERTY_MEMBER_FLAG_BASICSUPPORT_MULTICHANNEL;

            // fill in the stepped range
            PKSPROPERTY_STEPPING_LONG Range = PKSPROPERTY_STEPPING_LONG(Members + 1);
            Range->Bounds.SignedMaximum = 0x00000000;      //   0 dB
            Range->Bounds.SignedMinimum = -96 * 0x10000;   // -96 dB
            Range->SteppingDelta        = 0x08000;         //  .5 dB
            Range->Reserved             = 0;

            // set the return value size
            PropertyRequest->ValueSize = cbFullProperty;
        } else {
            PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION);
        }
    } else if(PropertyRequest->ValueSize >= sizeof(ULONG)) {
        // if return buffer can hold a ULONG, return the access flags
        PULONG AccessFlags = PULONG(PropertyRequest->Value);

        PropertyRequest->ValueSize = sizeof(ULONG);
        *AccessFlags = KSPROPERTY_TYPE_ALL;
    } else {
        PropertyRequest->ValueSize = 0;
        ntStatus = STATUS_BUFFER_TOO_SMALL;
    }

    return ntStatus;
} // PropertyHandlerBasicSupportVolume

Exemplo n.º 2

Arquivo: kshelper.cpp Projeto: Realhram/wdk81

NTSTATUS
PropertyHandler_BasicSupportPeakMeter2
(
    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
    _In_  ULONG                 MaxChannels
)
/*++

Routine Description:

  Handles BasicSupport for peak meter nodes.

Arguments:
    
  PropertyRequest - property request structure.

  MaxChannels - # of supported channels.

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    NTSTATUS                    ntStatus = STATUS_SUCCESS;
    ULONG                       cbFullProperty = 
        sizeof(KSPROPERTY_DESCRIPTION) +
        sizeof(KSPROPERTY_MEMBERSHEADER) +
        sizeof(KSPROPERTY_STEPPING_LONG) * MaxChannels;
    
    ASSERT(MaxChannels > 0);

    if (PropertyRequest->ValueSize >= (sizeof(KSPROPERTY_DESCRIPTION)))
    {
        PKSPROPERTY_DESCRIPTION PropDesc = 
            PKSPROPERTY_DESCRIPTION(PropertyRequest->Value);

        PropDesc->AccessFlags       = KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT;
        PropDesc->DescriptionSize   = cbFullProperty;
        PropDesc->PropTypeSet.Set   = KSPROPTYPESETID_General;
        PropDesc->PropTypeSet.Id    = VT_I4;
        PropDesc->PropTypeSet.Flags = 0;
        PropDesc->MembersListCount  = 1;
        PropDesc->Reserved          = 0;

        // if return buffer can also hold a range description, return it too
        if(PropertyRequest->ValueSize >= cbFullProperty)
        {
            // fill in the members header
            PKSPROPERTY_MEMBERSHEADER Members = 
                PKSPROPERTY_MEMBERSHEADER(PropDesc + 1);

            Members->MembersFlags   = KSPROPERTY_MEMBER_STEPPEDRANGES;
            Members->MembersSize    = sizeof(KSPROPERTY_STEPPING_LONG);
            Members->MembersCount   = MaxChannels;
            Members->Flags          = KSPROPERTY_MEMBER_FLAG_BASICSUPPORT_MULTICHANNEL;

            // fill in the stepped range
            PKSPROPERTY_STEPPING_LONG Range = 
                PKSPROPERTY_STEPPING_LONG(Members + 1);

            for (ULONG i=0; i<MaxChannels; ++i)
            {
                Range[i].Bounds.SignedMaximum = PEAKMETER_SIGNED_MAXIMUM;
                Range[i].Bounds.SignedMinimum = PEAKMETER_SIGNED_MINIMUM;
                Range[i].SteppingDelta        = PEAKMETER_STEPPING_DELTA;
                Range[i].Reserved             = 0;
            }

            // set the return value size
            PropertyRequest->ValueSize = cbFullProperty;
        } 
        else
        {
            PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION);
        }
    } 
    else if(PropertyRequest->ValueSize >= sizeof(ULONG))
    {
        // if return buffer can hold a ULONG, return the access flags
        PULONG AccessFlags = PULONG(PropertyRequest->Value);

        PropertyRequest->ValueSize = sizeof(ULONG);
        *AccessFlags = KSPROPERTY_TYPE_ALL;
    }
    else
    {
        PropertyRequest->ValueSize = 0;
        ntStatus = STATUS_BUFFER_TOO_SMALL;
    }

    return ntStatus;
} // PropertyHandlerBasicSupportVolume