windows-server-2003/drivers/wdm/audio/sysaudio/pi.cpp

//---------------------------------------------------------------------------
//
//  Module:   pi.cpp
//
//  Description:
//
//
//@@BEGIN_MSINTERNAL
//  Development Team:
//     Mike McLaughlin
//
//  History:   Date	  Author      Comment
//
//  To Do:     Date	  Author      Comment
//
//@@END_MSINTERNAL
//
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
//  PURPOSE.
//
//  Copyright (c) 1996-1999 Microsoft Corporation.  All Rights Reserved.
//
//---------------------------------------------------------------------------

#include "common.h"

//---------------------------------------------------------------------------
//---------------------------------------------------------------------------

DATARANGES DataRangesNull = {
    {
        sizeof(KSMULTIPLE_ITEM) + sizeof(KSDATARANGE),
        1
    },
    {
        sizeof(KSDATARANGE),
        0,
        STATICGUIDOF(GUID_NULL),
        STATICGUIDOF(GUID_NULL),
        STATICGUIDOF(GUID_NULL),
    }
};

IDENTIFIERS IdentifiersNull = {
    {
        sizeof(KSMULTIPLE_ITEM) + sizeof(KSIDENTIFIER),
        1
    },
    {
        STATICGUIDOF(GUID_NULL),
        0,
        0
    }
};

//---------------------------------------------------------------------------
//---------------------------------------------------------------------------

CPinInfo::CPinInfo(
    PFILTER_NODE pFilterNode,
    ULONG PinId
)
{
    Assert(pFilterNode);
    this->pFilterNode = pFilterNode;
    this->PinId = PinId;
    AddList(&pFilterNode->lstPinInfo);
}

CPinInfo::~CPinInfo()
{
    Assert(this);

    // Free physical connection data
    delete pPhysicalConnection;
    delete pwstrName;

}

ENUMFUNC
CPinInfo::CreatePhysicalConnection(
)
{
    NTSTATUS Status;

    Assert(this);
    if(pPhysicalConnection != NULL) {
        PFILTER_NODE pFilterNodeConnect;
        PPIN_INFO pPinInfoConnect;

        ASSERT(pPhysicalConnection->Size != 0);
        Status = AddFilter(
          pPhysicalConnection->SymbolicLinkName,
          &pFilterNodeConnect);

        if(!NT_SUCCESS(Status)) {
            DPF1(10,
              "CreatePhysicalConnection: AddFilter FAILED: %08x", Status);
            goto exit;
        }
        Assert(pFilterNodeConnect);

        FOR_EACH_LIST_ITEM(&pFilterNodeConnect->lstPinInfo, pPinInfoConnect) {

            if(pPhysicalConnection->Pin == pPinInfoConnect->PinId) {

                DPF2(50, "CreatePhysicalConnection: From %d %s",
                  PinId,
                  pFilterNode->DumpName());

                DPF2(50, "CreatePhysicalConnection: To %d %s",
                  pPinInfoConnect->PinId,
                  pPinInfoConnect->pFilterNode->DumpName());

                if(DataFlow == KSPIN_DATAFLOW_OUT &&
                   pPinInfoConnect->DataFlow == KSPIN_DATAFLOW_IN) {
                    PTOPOLOGY_CONNECTION pTopologyConnection;

                    Status = CreatePinInfoConnection(
                       &pTopologyConnection,
                       pFilterNode,
                       NULL,
                       this,
                       pPinInfoConnect);

                    if(!NT_SUCCESS(Status)) {
                       Trap();
                       goto exit;
                    }
                }
                else {
                    DPF(50, "CreatePhysicalConnection: rejected");
                }
                break;
            }

        } END_EACH_LIST_ITEM

        delete pPhysicalConnection;
        pPhysicalConnection = NULL;
    }
    Status = STATUS_CONTINUE;
exit:
    return(Status);
}

NTSTATUS CPinInfo::GetPinInstances(
    PFILE_OBJECT pFileObject,
    PKSPIN_CINSTANCES pcInstances
)
{
    NTSTATUS Status;

    Status = GetPinProperty(
      pFileObject,
      KSPROPERTY_PIN_CINSTANCES,
      PinId,
      sizeof(KSPIN_CINSTANCES),
      (PVOID) pcInstances);

    return Status;
} // GetPinInstances

NTSTATUS
CPinInfo::Create(
    PFILE_OBJECT pFileObject
)
{
    NTSTATUS Status = STATUS_SUCCESS;
    PDATARANGES pDataRanges;
    PIDENTIFIERS pInterfaces;
    PIDENTIFIERS pMediums;

    Assert(this);
    Assert(pFilterNode);

    Status = GetPinInstances(pFileObject, &cPinInstances);
    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }

    Status = GetPinProperty(
      pFileObject,
      KSPROPERTY_PIN_DATAFLOW,
      PinId,
      sizeof(KSPIN_DATAFLOW),
      (PVOID)&DataFlow);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }

    Status = GetPinProperty(
      pFileObject,
      KSPROPERTY_PIN_COMMUNICATION,
      PinId,
      sizeof(KSPIN_COMMUNICATION),
      (PVOID)&Communication);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }
    pguidCategory = new GUID;
    if(pguidCategory == NULL) {
        Trap();
        Status = STATUS_INSUFFICIENT_RESOURCES;
        goto exit;
    }
    Status = GetPinProperty(
      pFileObject,
      KSPROPERTY_PIN_CATEGORY,
      PinId,
      sizeof(GUID),
      (PVOID)pguidCategory);

    if(NT_SUCCESS(Status)) {
        Status = pFilterNode->lstFreeMem.AddList(pguidCategory);
        if(!NT_SUCCESS(Status)) {
            Trap();
            delete pguidCategory;
            pguidCategory = NULL;
            goto exit;
        }
    }
    else {
        delete pguidCategory;
        pguidCategory = NULL;
        if(Status != STATUS_NOT_FOUND) {
            Trap();
            goto exit;
        }
    }

    Status = GetPinPropertyEx(
      pFileObject,
      KSPROPERTY_PIN_NAME,
      PinId,
      (PVOID*)&pwstrName);

    if(!NT_SUCCESS(Status) && Status != STATUS_OBJECT_NAME_NOT_FOUND) {
        Trap();
        goto exit;
    }

    Status = GetPinPropertyEx(
      pFileObject,
      KSPROPERTY_PIN_PHYSICALCONNECTION,
      PinId,
      (PVOID*)&pPhysicalConnection);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }

    Status = GetPinPropertyEx(
      pFileObject,
      KSPROPERTY_PIN_INTERFACES,
      PinId,
      (PVOID*)&pInterfaces);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }

    if(pInterfaces == NULL || pInterfaces->MultipleItem.Count == 0) {
        delete pInterfaces;
        pInterfaces = &IdentifiersNull;
    }
    else {
        Status = pFilterNode->lstFreeMem.AddList(pInterfaces);
        if(!NT_SUCCESS(Status)) {
            Trap();
            delete pInterfaces;
            goto exit;
        }
    }

    Status = GetPinPropertyEx(
      pFileObject,
      KSPROPERTY_PIN_MEDIUMS,
      PinId,
      (PVOID*)&pMediums);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }

    if(pMediums == NULL || pMediums->MultipleItem.Count == 0) {
        delete pMediums;
        pMediums = &IdentifiersNull;
    }
    else {
        Status = pFilterNode->lstFreeMem.AddList(pMediums);
        if(!NT_SUCCESS(Status)) {
            Trap();
            delete pMediums;
            goto exit;
        }
    }

    Status = GetPinPropertyEx(
      pFileObject,
      KSPROPERTY_PIN_DATARANGES,
      PinId,
      (PVOID*)&pDataRanges);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }

    if(pDataRanges == NULL || pDataRanges->MultipleItem.Count == 0) {
        Trap();
        delete pDataRanges;
        pDataRanges = &DataRangesNull;
    }
    else {
        Status = pFilterNode->lstFreeMem.AddList(pDataRanges);
        if(!NT_SUCCESS(Status)) {
            Trap();
            delete pDataRanges;
            goto exit;
        }
    }

    Status = CPinNode::CreateAll(
      this,
      pDataRanges,
      pInterfaces,
      pMediums);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }

    // ISSUE-2001/05/15-alpers    
    // This is a temporary low risk solution to reverse DataRange problem.
    // This needs to be implemented properly in the future.
    //

    if (pFilterNode->GetType() & FILTER_TYPE_AEC) {
        DPF(10, "AEC Filter Pin : Reversing Data Ranges");
        lstPinNode.ReverseList();
    }

    if (pFilterNode->GetType() & FILTER_TYPE_GFX) {
        DPF(10, "GFX Filter Pin : Reversing Data Ranges");
        lstPinNode.ReverseList();
    }

exit:
    return(Status);
}