Sample Code
Windows Driver Samples/ Microsoft slate system virtual audio device driver sample/ C++/ SlateAudioSample/ hdmitopo.cpp/
/*++
Copyright (c) Microsoft Corporation All Rights Reserved
Module Name:
hdmitopo.cpp
Abstract:
Implementation of topology miniport for the hdmi endpoint.
--*/
#pragma warning (disable : 4127)
#include <sysvad.h>
#include "simple.h"
#include "mintopo.h"
#include "hdmitopo.h"
#include "hdmitoptable.h"
#include <ntstrsafe.h>
#pragma code_seg("PAGE")
//=============================================================================
NTSTATUS
CreateHdmiMiniportTopology
(
_Out_ PUNKNOWN * Unknown,
_In_ REFCLSID,
_In_opt_ PUNKNOWN UnknownOuter,
_When_((PoolType & NonPagedPoolMustSucceed) != 0,
__drv_reportError("Must succeed pool allocations are forbidden. "
"Allocation failures cause a system crash"))
_In_ POOL_TYPE PoolType,
_In_ PUNKNOWN UnknownAdapter,
_In_opt_ PVOID DeviceContext,
_In_ PENDPOINT_MINIPAIR MiniportPair
)
/*++
Routine Description:
Creates a new topology miniport.
Arguments:
Unknown -
RefclsId -
UnknownOuter -
PoolType -
UnknownAdapter -
DeviceContext -
MiniportPair -
Return Value:
NT status code.
--*/
{
PAGED_CODE();
ASSERT(Unknown);
ASSERT(MiniportPair);
UNREFERENCED_PARAMETER(UnknownAdapter);
UNREFERENCED_PARAMETER(DeviceContext);
CHdmiMiniportTopology *obj =
new (PoolType, MINWAVERT_POOLTAG)
CHdmiMiniportTopology( UnknownOuter,
MiniportPair->TopoDescriptor,
MiniportPair->DeviceMaxChannels);
if (NULL == obj)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
obj->AddRef();
*Unknown = reinterpret_cast<IUnknown*>(obj);
return STATUS_SUCCESS;
} // CreateHdmiMiniportTopology
//=============================================================================
CHdmiMiniportTopology::~CHdmiMiniportTopology
(
void
)
/*++
Routine Description:
Topology miniport destructor
Arguments:
Return Value:
NT status code.
--*/
{
PAGED_CODE();
DPF_ENTER(("[CHdmiMiniportTopology::~CHdmiMiniportTopology]"));
} // ~CHdmiMiniportTopology
//=============================================================================
NTSTATUS
CHdmiMiniportTopology::DataRangeIntersection
(
_In_ ULONG PinId,
_In_ PKSDATARANGE ClientDataRange,
_In_ PKSDATARANGE MyDataRange,
_In_ ULONG OutputBufferLength,
_Out_writes_bytes_to_opt_(OutputBufferLength, *ResultantFormatLength)
PVOID ResultantFormat OPTIONAL,
_Out_ PULONG ResultantFormatLength
)
/*++
Routine Description:
The DataRangeIntersection function determines the highest quality
intersection of two data ranges.
Arguments:
PinId - Pin for which data intersection is being determined.
ClientDataRange - Pointer to KSDATARANGE structure which contains the data range
submitted by client in the data range intersection property
request.
MyDataRange - Pin's data range to be compared with client's data range.
OutputBufferLength - Size of the buffer pointed to by the resultant format
parameter.
ResultantFormat - Pointer to value where the resultant format should be
returned.
ResultantFormatLength - Actual length of the resultant format that is placed
at ResultantFormat. This should be less than or equal
to OutputBufferLength.
Return Value:
NT status code.
--*/
{
PAGED_CODE();
return
CMiniportTopologySYSVAD::DataRangeIntersection
(
PinId,
ClientDataRange,
MyDataRange,
OutputBufferLength,
ResultantFormat,
ResultantFormatLength
);
} // DataRangeIntersection
//=============================================================================
STDMETHODIMP
CHdmiMiniportTopology::GetDescription
(
_Out_ PPCFILTER_DESCRIPTOR * OutFilterDescriptor
)
/*++
Routine Description:
The GetDescription function gets a pointer to a filter description.
It provides a location to deposit a pointer in miniport's description
structure. This is the placeholder for the FromNode or ToNode fields in
connections which describe connections to the filter's pins.
Arguments:
OutFilterDescriptor - Pointer to the filter description.
Return Value:
NT status code.
--*/
{
PAGED_CODE();
ASSERT(OutFilterDescriptor);
return CMiniportTopologySYSVAD::GetDescription(OutFilterDescriptor);
} // GetDescription
//=============================================================================
STDMETHODIMP
CHdmiMiniportTopology::Init
(
_In_ PUNKNOWN UnknownAdapter,
_In_ PRESOURCELIST ResourceList,
_In_ PPORTTOPOLOGY Port_
)
/*++
Routine Description:
The Init function initializes the miniport. Callers of this function
should run at IRQL PASSIVE_LEVEL
Arguments:
UnknownAdapter - A pointer to the Iuknown interface of the adapter object.
ResourceList - Pointer to the resource list to be supplied to the miniport
during initialization. The port driver is free to examine the
contents of the ResourceList. The port driver will not be
modify the ResourceList contents.
Port - Pointer to the topology port object that is linked with this miniport.
Return Value:
NT status code.
--*/
{
UNREFERENCED_PARAMETER(ResourceList);
PAGED_CODE();
ASSERT(UnknownAdapter);
ASSERT(Port_);
DPF_ENTER(("[CHdmiMiniportTopology::Init]"));
NTSTATUS ntStatus;
ntStatus =
CMiniportTopologySYSVAD::Init
(
UnknownAdapter,
Port_
);
return ntStatus;
} // Init
//=============================================================================
STDMETHODIMP
CHdmiMiniportTopology::NonDelegatingQueryInterface
(
_In_ REFIID Interface,
_COM_Outptr_ PVOID * Object
)
/*++
Routine Description:
QueryInterface for MiniportTopology
Arguments:
Interface - GUID of the interface
Object - interface object to be returned.
Return Value:
NT status code.
--*/
{
PAGED_CODE();
ASSERT(Object);
if (IsEqualGUIDAligned(Interface, IID_IUnknown))
{
*Object = PVOID(PUNKNOWN(this));
}
else if (IsEqualGUIDAligned(Interface, IID_IMiniport))
{
*Object = PVOID(PMINIPORT(this));
}
else if (IsEqualGUIDAligned(Interface, IID_IMiniportTopology))
{
*Object = PVOID(PMINIPORTTOPOLOGY(this));
}
else
{
*Object = NULL;
}
if (*Object)
{
// We reference the interface for the caller.
PUNKNOWN(*Object)->AddRef();
return(STATUS_SUCCESS);
}
return(STATUS_INVALID_PARAMETER);
} // NonDelegatingQueryInterface
//=============================================================================
#define SINK_DESC_STR L"SinkDescription Sample"
NTSTATUS
CHdmiMiniportTopology::PropertyHandlerJackSinkInfo
(
_In_ PPCPROPERTY_REQUEST PropertyRequest
)
/*++
Routine Description:
Handles ( KSPROPSETID_Jack, KSPROPERTY_JACK_SINK_INFO )
Arguments:
PropertyRequest -
Return Value:
NT status code.
--*/
{
PAGED_CODE();
ASSERT(PropertyRequest);
DPF_ENTER(("[PropertyHandlerJackSinkInfo]"));
NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
ULONG nPinId = (ULONG)-1;
if (PropertyRequest->InstanceSize >= sizeof(ULONG))
{
nPinId = *(PULONG(PropertyRequest->Instance));
if (nPinId == KSPIN_TOPO_LINEOUT_DEST)
{
if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
{
ntStatus =
PropertyHandler_BasicSupport
(
PropertyRequest,
KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
VT_ILLEGAL
);
}
else
{
ULONG cbNeeded = sizeof(KSJACK_SINK_INFORMATION);
if (PropertyRequest->ValueSize == 0)
{
PropertyRequest->ValueSize = cbNeeded;
ntStatus = STATUS_BUFFER_OVERFLOW;
}
else if (PropertyRequest->ValueSize < cbNeeded)
{
ntStatus = STATUS_BUFFER_TOO_SMALL;
}
else
{
if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
{
size_t cchLength;
PKSJACK_SINK_INFORMATION sinkInfo = (PKSJACK_SINK_INFORMATION)PropertyRequest->Value;
RtlZeroMemory(sinkInfo, sizeof(KSJACK_SINK_INFORMATION));
//
// Init sink info data (example follows).
//
sinkInfo->ConnType = KSJACK_SINK_CONNECTIONTYPE_HDMI;
sinkInfo->ManufacturerId = 0;
sinkInfo->ProductId = 0;
sinkInfo->AudioLatency = 0;
sinkInfo->HDCPCapable = TRUE;
sinkInfo->AICapable = TRUE;
cchLength = sizeof(SINK_DESC_STR)/sizeof(WCHAR) - 1; // -1 to remove the null wchar.
if (cchLength < MAX_SINK_DESCRIPTION_NAME_LENGTH)
{
sinkInfo->SinkDescriptionLength = (UCHAR)cchLength;
(void)RtlStringCchCopyW
(
sinkInfo->SinkDescription,
MAX_SINK_DESCRIPTION_NAME_LENGTH,
SINK_DESC_STR
);
}
ntStatus = STATUS_SUCCESS;
}
}
}
}
}
return ntStatus;
}
//=============================================================================
NTSTATUS
CHdmiMiniportTopology::PropertyHandlerJackDescription
(
_In_ PPCPROPERTY_REQUEST PropertyRequest
)
/*++
Routine Description:
Handles ( KSPROPSETID_Jack, KSPROPERTY_JACK_DESCRIPTION )
Arguments:
PropertyRequest
Return Value:
NT status code.
--*/
{
PAGED_CODE();
ASSERT(PropertyRequest);
DPF_ENTER(("[PropertyHandlerJackDescription]"));
ULONG cJackDescriptions = ARRAYSIZE(HdmiJackDescriptions);
PKSJACK_DESCRIPTION * JackDescriptions = HdmiJackDescriptions;
NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
ULONG nPinId = (ULONG)-1;
if (PropertyRequest->InstanceSize >= sizeof(ULONG))
{
nPinId = *(PULONG(PropertyRequest->Instance));
if ((nPinId < cJackDescriptions) && (JackDescriptions[nPinId] != NULL))
{
if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
{
ntStatus =
PropertyHandler_BasicSupport
(
PropertyRequest,
KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
VT_ILLEGAL
);
}
else
{
ULONG cbNeeded = sizeof(KSMULTIPLE_ITEM) + sizeof(KSJACK_DESCRIPTION);
if (PropertyRequest->ValueSize == 0)
{
PropertyRequest->ValueSize = cbNeeded;
ntStatus = STATUS_BUFFER_OVERFLOW;
}
else if (PropertyRequest->ValueSize < cbNeeded)
{
ntStatus = STATUS_BUFFER_TOO_SMALL;
}
else
{
if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
{
PKSMULTIPLE_ITEM pMI = (PKSMULTIPLE_ITEM)PropertyRequest->Value;
PKSJACK_DESCRIPTION pDesc = (PKSJACK_DESCRIPTION)(pMI+1);
pMI->Size = cbNeeded;
pMI->Count = 1;
RtlCopyMemory(pDesc, JackDescriptions[nPinId], sizeof(KSJACK_DESCRIPTION));
ntStatus = STATUS_SUCCESS;
}
}
}
}
}
return ntStatus;
}
//=============================================================================
NTSTATUS
CHdmiMiniportTopology::PropertyHandlerJackDescription2
(
_In_ PPCPROPERTY_REQUEST PropertyRequest
)
/*++
Routine Description:
Handles ( KSPROPSETID_Jack, KSPROPERTY_JACK_DESCRIPTION2 )
Arguments:
PropertyRequest -
Return Value:
NT status code.
--*/
{
PAGED_CODE();
ASSERT(PropertyRequest);
DPF_ENTER(("[PropertyHandlerJackDescription2]"));
NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
ULONG nPinId = (ULONG)-1;
ULONG cJackDescriptions = ARRAYSIZE(HdmiJackDescriptions);
PKSJACK_DESCRIPTION * JackDescriptions = HdmiJackDescriptions;
if (PropertyRequest->InstanceSize >= sizeof(ULONG))
{
nPinId = *(PULONG(PropertyRequest->Instance));
if ((nPinId < cJackDescriptions) && (JackDescriptions[nPinId] != NULL))
{
if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
{
ntStatus =
PropertyHandler_BasicSupport
(
PropertyRequest,
KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
VT_ILLEGAL
);
}
else
{
ULONG cbNeeded = sizeof(KSMULTIPLE_ITEM) + sizeof(KSJACK_DESCRIPTION2);
if (PropertyRequest->ValueSize == 0)
{
PropertyRequest->ValueSize = cbNeeded;
ntStatus = STATUS_BUFFER_OVERFLOW;
}
else if (PropertyRequest->ValueSize < cbNeeded)
{
ntStatus = STATUS_BUFFER_TOO_SMALL;
}
else
{
if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
{
PKSMULTIPLE_ITEM pMI = (PKSMULTIPLE_ITEM)PropertyRequest->Value;
PKSJACK_DESCRIPTION2 pDesc = (PKSJACK_DESCRIPTION2)(pMI+1);
pMI->Size = cbNeeded;
pMI->Count = 1;
RtlZeroMemory(pDesc, sizeof(KSJACK_DESCRIPTION2));
//
// Specifies the lower 16 bits of the DWORD parameter. This parameter indicates whether
// the jack is currently active, streaming, idle, or hardware not ready.
//
pDesc->DeviceStateInfo = 0;
//
// From MSDN:
// "If an audio device lacks jack presence detection, the IsConnected member of
// the KSJACK_DESCRIPTION structure must always be set to TRUE. To remove the
// ambiguity that results from this dual meaning of the TRUE value for IsConnected,
// a client application can call IKsJackDescription2::GetJackDescription2 to read
// the JackCapabilities flag of the KSJACK_DESCRIPTION2 structure. If this flag has
// the JACKDESC2_PRESENCE_DETECT_CAPABILITY bit set, it indicates that the endpoint
// does in fact support jack presence detection. In that case, the return value of
// the IsConnected member can be interpreted to accurately reflect the insertion status
// of the jack."
//
// Bit definitions:
// 0x00000001 - JACKDESC2_PRESENCE_DETECT_CAPABILITY
// 0x00000002 - JACKDESC2_DYNAMIC_FORMAT_CHANGE_CAPABILITY
//
pDesc->JackCapabilities = JACKDESC2_PRESENCE_DETECT_CAPABILITY;
ntStatus = STATUS_SUCCESS;
}
}
}
}
}
return ntStatus;
}
//=============================================================================
NTSTATUS
PropertyHandler_HdmiTopoFilter
(
_In_ PPCPROPERTY_REQUEST PropertyRequest
)
/*++
Routine Description:
Redirects property request to miniport object
Arguments:
PropertyRequest -
Return Value:
NT status code.
--*/
{
PAGED_CODE();
ASSERT(PropertyRequest);
DPF_ENTER(("[PropertyHandler_HdmiTopoFilter]"));
// PropertryRequest structure is filled by portcls.
// MajorTarget is a pointer to miniport object for miniports.
//
NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
PCHdmiMiniportTopology pMiniport = (PCHdmiMiniportTopology)PropertyRequest->MajorTarget;
if (IsEqualGUIDAligned(*PropertyRequest->PropertyItem->Set, KSPROPSETID_Jack))
{
if (PropertyRequest->PropertyItem->Id == KSPROPERTY_JACK_DESCRIPTION)
{
ntStatus = pMiniport->PropertyHandlerJackDescription(PropertyRequest);
}
else if (PropertyRequest->PropertyItem->Id == KSPROPERTY_JACK_DESCRIPTION2)
{
ntStatus = pMiniport->PropertyHandlerJackDescription2(PropertyRequest);
}
else if (PropertyRequest->PropertyItem->Id == KSPROPERTY_JACK_SINK_INFO)
{
ntStatus = pMiniport->PropertyHandlerJackSinkInfo(PropertyRequest);
}
}
return ntStatus;
} // PropertyHandler_HdmiTopoFilter
#pragma code_seg()
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