//=============================================================================
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
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
