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413 lines
10 KiB
413 lines
10 KiB
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//---------------------------------------------------------------------------
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// Bda Topology Implementation Internal Structures
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//
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// Minidriver code should not attempt to access these structures
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// directly.
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//
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//---------------------------------------------------------------------------
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#define FILTERNAME "BdaTopology"
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#define DYNAMIC_TOPOLOGY TRUE
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#if defined(__cplusplus)
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extern "C" {
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#endif // defined(__cplusplus)
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//===========================================================================
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//
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// MACRO definitions
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//
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//===========================================================================
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#define BDA_PIN_STORAGE_INCREMENT 5
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//===========================================================================
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//
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// Advance declarations
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//
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//===========================================================================
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typedef struct _BDA_PIN_FACTORY_CONTEXT BDA_PIN_FACTORY_CONTEXT,
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*PBDA_PIN_FACTORY_CONTEXT;
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//===========================================================================
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//
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// BDA Object Context Structures
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//
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//===========================================================================
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typedef struct _BDA_CONTEXT_ENTRY
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{
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PVOID pvReference;
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PVOID pvContext;
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ULONG ulcbContext;
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} BDA_CONTEXT_ENTRY, * PBDA_CONTEXT_ENTRY;
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typedef struct _BDA_CONTEXT_LIST
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{
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ULONG ulcListEntries;
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ULONG ulcMaxListEntries;
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ULONG ulcListEntriesPerBlock;
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PBDA_CONTEXT_ENTRY pListEntries;
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KSPIN_LOCK lock;
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BOOLEAN fInitialized;
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} BDA_CONTEXT_LIST, * PBDA_CONTEXT_LIST;
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typedef struct _BDA_TEMPLATE_PATH
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{
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LIST_ENTRY leLinkage;
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ULONG ulInputPinType;
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ULONG ulOutputPinType;
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ULONG uliJoint;
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ULONG ulcControlNodesInPath;
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PULONG argulControlNodesInPath;
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} BDA_TEMPLATE_PATH, * PBDA_TEMPLATE_PATH;
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__inline NTSTATUS
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NewBdaTemplatePath(
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PBDA_TEMPLATE_PATH * ppTemplatePath
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)
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{
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NTSTATUS status = STATUS_SUCCESS;
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if (!ppTemplatePath)
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{
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status = STATUS_INVALID_PARAMETER;
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goto errExit;
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}
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*ppTemplatePath = (PBDA_TEMPLATE_PATH) ExAllocatePool(
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NonPagedPool,
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sizeof( BDA_TEMPLATE_PATH)
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);
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if (!*ppTemplatePath)
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{
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status = STATUS_INSUFFICIENT_RESOURCES;
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goto errExit;
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}
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RtlZeroMemory( *ppTemplatePath, sizeof( BDA_TEMPLATE_PATH));
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InitializeListHead( &(*ppTemplatePath)->leLinkage);
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errExit:
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return status;
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}
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__inline NTSTATUS
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DeleteBdaTemplatePath(
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PBDA_TEMPLATE_PATH pTemplatePath
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)
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{
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NTSTATUS status = STATUS_SUCCESS;
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if (!pTemplatePath)
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{
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status = STATUS_INVALID_PARAMETER;
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goto errExit;
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}
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if (pTemplatePath->argulControlNodesInPath)
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{
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ExFreePool( pTemplatePath->argulControlNodesInPath);
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pTemplatePath->argulControlNodesInPath = NULL;
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}
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RtlZeroMemory( pTemplatePath, sizeof( BDA_TEMPLATE_PATH));
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ExFreePool( pTemplatePath);
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errExit:
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return status;
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}
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typedef struct _BDA_DEVICE_CONTEXT
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{
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ULONG ulStartEmpty;
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//$BUG Add global statistics
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} BDA_DEVICE_CONTEXT, *PBDA_DEVICE_CONTEXT;
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typedef struct _BDA_PATH_STACK_ENTRY
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{
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ULONG ulHop;
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ULONG uliConnection;
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BOOLEAN fJoint;
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} BDA_PATH_STACK_ENTRY, *PBDA_PATH_STACK_ENTRY;
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typedef struct _BDA_NODE_CONTROL_INFO
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{
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ULONG ulNodeType;
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ULONG ulControllingPinType;
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} BDA_NODE_CONTROL_INFO, * PBDA_NODE_CONTROL_INFO;
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typedef struct _BDA_PATH_INFO
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{
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ULONG ulInputPin;
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ULONG ulOutputPin;
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ULONG ulcPathEntries;
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BDA_PATH_STACK_ENTRY rgPathEntries[MIN_DIMENSION];
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} BDA_PATH_INFO, * PBDA_PATH_INFO;
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typedef struct _BDA_FILTER_FACTORY_CONTEXT
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{
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const BDA_FILTER_TEMPLATE * pBdaFilterTemplate;
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const KSFILTER_DESCRIPTOR * pInitialFilterDescriptor;
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PKSFILTERFACTORY pKSFilterFactory;
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} BDA_FILTER_FACTORY_CONTEXT, *PBDA_FILTER_FACTORY_CONTEXT;
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typedef struct _BDA_FILTER_CONTEXT
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{
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PKSFILTER pKSFilter;
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const BDA_FILTER_TEMPLATE * pBdaFilterTemplate;
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// Pins are added as they are created.
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// Note! If the filter has m pin factories included in the
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// initial filter descriptor then the first m entries in this array
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// will contain null pointers.
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//
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ULONG ulcPinFactories;
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ULONG ulcPinFactoriesMax;
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PBDA_PIN_FACTORY_CONTEXT argPinFactoryCtx;
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// One node path will exist for each pin pairing.
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//
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//$REVIEW - Should we allow more than one path per pin pair?
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//
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ULONG ulcPathInfo;
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PBDA_PATH_INFO * argpPathInfo;
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} BDA_FILTER_CONTEXT, *PBDA_FILTER_CONTEXT;
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typedef struct _BDA_PIN_FACTORY_CONTEXT
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{
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ULONG ulPinType;
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ULONG ulPinFactoryId;
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} BDA_PIN_FACTORY_CONTEXT, *PBDA_PIN_FACTORY_CONTEXT;
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typedef struct _BDA_NODE_CONTEXT
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{
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ULONG ulStartEmpty;
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} BDA_NODE_CONTEXT, *PBDA_NODE_CONTEXT;
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//---------------------------------------------------------------------------
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// BDA Topology Implementation Internal Functions
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//
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// Minidriver code should not call these routines directly.
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//
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//---------------------------------------------------------------------------
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/*
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** BdaFindPinPair()
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**
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** Returns a pointer to the BDA_PIN_PAIRING that corresponds
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** to the given input and output pins.
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**
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** Arguments:
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**
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** pTopology Pointer to the BDA topology that contains the
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** pin pairing.
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**
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** InputPinId Id of the input Pin to match
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**
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** OutputPinId Id of the output Pin to match
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**
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** Returns:
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**
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** pPinPairing Pointer to a valid BDA Pin Pairing structure
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**
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** NULL If no valid pin pairing exists with the
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** given input and output pins.
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**
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** Side Effects: none
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*/
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PBDA_PIN_PAIRING
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BdaFindPinPair(
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PBDA_FILTER_TEMPLATE pFilterTemplate,
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ULONG InputPinId,
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ULONG OutputPinId
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);
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/*
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** BdaGetPinFactoryContext()
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**
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** Finds a BDA PinFactory Context that corresponds
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** to the given KS Pin Instance.
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**
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** Arguments:
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**
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**
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** Returns:
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**
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**
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**
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** Side Effects: none
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*/
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STDMETHODIMP_(NTSTATUS)
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BdaGetPinFactoryContext(
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PKSPIN pKSPin,
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PBDA_PIN_FACTORY_CONTEXT pPinFactoryCtx
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);
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/*
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** BdaInitFilterFactoryContext()
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**
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** Initializes a BDA Filter Factory Context based on the filter's
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** template descriptor.
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**
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**
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** Arguments:
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**
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**
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** pFilterFactoryCtx
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**
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** Returns:
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**
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** NULL If no valid pin pairing exists with the
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** given input and output pins.
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**
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** Side Effects: none
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*/
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STDMETHODIMP_(NTSTATUS)
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BdaInitFilterFactoryContext(
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PBDA_FILTER_FACTORY_CONTEXT pFilterFactoryCtx
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);
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/*
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** BdaAddNodeAutomationToPin()
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**
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** Merges the automation tables for each node type that is controlled
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** by the pin type being created into the automation table for the
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** the pin factory. This is how the automation tables for BDA
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** control nodes get linked to the controlling pin. Otherwise the
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** nodes would not be accesable.
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**
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**
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** Arguments:
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**
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**
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** pFilterCtx The BDA filter context to which the pin factory
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** belongs. Must have this to get at the template
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** topology.
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**
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** ulPinType BDA Pin Type of the pin being created. Need this
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** to figure out which nodes are controlled by the
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** pin.
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**
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** Returns:
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**
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**
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** Side Effects: none
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*/
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STDMETHODIMP_(NTSTATUS)
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BdaAddNodeAutomationToPin(
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PBDA_FILTER_CONTEXT pFilterCtx,
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ULONG ulControllingPinType,
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KSOBJECT_BAG ObjectBag,
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const KSAUTOMATION_TABLE * pOriginalAutomationTable,
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PKSAUTOMATION_TABLE * ppNewAutomationTable
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);
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/*
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** BdaCreateTemplatePaths()
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**
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** Creates a list of all possible paths through the template filter.
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** Determines the controlling pin type for each node type in the
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** template filter.
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**
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**
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** Arguments:
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**
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**
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** pFilterFactoryCtx
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**
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** Returns:
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**
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** NULL If no valid pin pairing exists with the
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** given input and output pins.
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**
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** Side Effects: none
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*/
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STDMETHODIMP_(NTSTATUS)
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BdaCreateTemplatePaths(
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const BDA_FILTER_TEMPLATE * pBdaFilterTemplate,
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PULONG pulcPathInfo,
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PBDA_PATH_INFO ** pargpPathInfo
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);
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ULONG __inline
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OutputBufferLenFromIrp(
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PIRP pIrp
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)
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{
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PIO_STACK_LOCATION pIrpStack;
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ASSERT( pIrp);
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if (!pIrp)
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{
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return 0;
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}
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pIrpStack = IoGetCurrentIrpStackLocation( pIrp);
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ASSERT( pIrpStack);
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if (pIrpStack)
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{
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return pIrpStack->Parameters.DeviceIoControl.OutputBufferLength;
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}
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else
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{
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return 0;
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}
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}
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//---------------------------------------------------------------------------
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// BDA Topology Const Data
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//
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// Minidriver code should not use these fields directly
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//
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//---------------------------------------------------------------------------
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extern const KSAUTOMATION_TABLE BdaDefaultPinAutomation;
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extern const KSAUTOMATION_TABLE BdaDefaultFilterAutomation;
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#if defined(__cplusplus)
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}
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#endif // defined(__cplusplus)
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