116 lines
2.2 KiB
C++
116 lines
2.2 KiB
C++
/*++
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Copyright (c) 1999 Microsoft Corporation
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Module Name:
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inpin.cpp
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Abstract:
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Transport input pin code.
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--*/
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#include "casamp.h"
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#ifdef ALLOC_DATA_PRAGMA
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#pragma const_seg("PAGECONST")
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#endif // ALLOC_DATA_PRAGMA
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#ifdef ALLOC_PRAGMA
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#pragma code_seg("PAGE")
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#endif // ALLOC_PRAGMA
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NTSTATUS
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CTransportInputPin::PinCreate(
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IN OUT PKSPIN pKSPin,
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IN PIRP Irp
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)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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CTransportInputPin* pPin;
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CFilter* pFilter;
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_DbgPrintF(DEBUGLVL_VERBOSE,("CTransportInputPin::PinCreate"));
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ASSERT(pKSPin);
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ASSERT(Irp);
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// Get a pointer to our filter instance that this pin is being
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// created for. Remember it for later.
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//
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pFilter = reinterpret_cast<CFilter*>(KsGetFilterFromIrp(Irp)->Context);
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// Create our transport pin object.
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//
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pPin = new(PagedPool,'IFsK') CTransportInputPin;
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if (!pPin)
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{
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Status = STATUS_INSUFFICIENT_RESOURCES;
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goto exit;
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}
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// Link our pin context to our filter context.
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//
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pPin->SetFilter( pFilter);
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// Link our context to the KSPIN structure.
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//
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pKSPin->Context = pPin;
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exit:
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return Status;
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}
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NTSTATUS
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CTransportInputPin::PinClose(
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IN OUT PKSPIN Pin,
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IN PIRP Irp
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)
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{
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_DbgPrintF(DEBUGLVL_VERBOSE,("PinClose"));
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ASSERT(Pin);
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ASSERT(Irp);
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CTransportInputPin* pin = reinterpret_cast<CTransportInputPin*>(Pin->Context);
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ASSERT(pin);
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delete pin;
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return STATUS_SUCCESS;
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}
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NTSTATUS
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CTransportInputPin::IntersectDataFormat(
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IN PVOID pContext,
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IN PIRP pIrp,
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IN PKSP_PIN Pin,
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IN PKSDATARANGE DataRange,
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IN PKSDATARANGE MatchingDataRange,
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IN ULONG DataBufferSize,
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OUT PVOID Data OPTIONAL,
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OUT PULONG DataSize
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)
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{
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if ( DataBufferSize < sizeof(KS_DATARANGE_BDA_TRANSPORT) )
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{
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*DataSize = sizeof( KS_DATARANGE_BDA_TRANSPORT );
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return STATUS_BUFFER_OVERFLOW;
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}
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else
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{
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ASSERT(DataBufferSize == sizeof(KS_DATARANGE_BDA_TRANSPORT));
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*DataSize = sizeof( KS_DATARANGE_BDA_TRANSPORT );
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RtlCopyMemory( Data, (PVOID)DataRange, sizeof(KS_DATARANGE_BDA_TRANSPORT));
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return STATUS_SUCCESS;
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}
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}
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