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

//---------------------------------------------------------------------------
//
//  Module:   cn.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"

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

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

NTSTATUS
CConnectNode::Create(
    PCONNECT_NODE *ppConnectNode,
    PLOGICAL_FILTER_NODE pLogicalFilterNode,
    PCONNECT_NODE pConnectNodeNext,
    PGRAPH_PIN_INFO pGraphPinInfo,
    PPIN_NODE pPinNode1,
    PPIN_NODE pPinNode2,
    ULONG ulFlagsCurrent,
    PGRAPH_NODE pGraphNode
)
{
    NTSTATUS Status = STATUS_SUCCESS;
    PCONNECT_NODE pConnectNode;

    Assert(pPinNode1);
    Assert(pPinNode2);

    pConnectNode = new CConnectNode(pConnectNodeNext);
    if(pConnectNode == NULL) {
        Status = STATUS_INSUFFICIENT_RESOURCES;
        goto exit;
    }

    switch(pPinNode1->pPinInfo->Communication) {
        case KSPIN_COMMUNICATION_BOTH:
            switch(pPinNode2->pPinInfo->Communication) {
                case KSPIN_COMMUNICATION_SINK:
                    pConnectNode->pPinNodeSource = pPinNode1;
                    pConnectNode->pPinNodeSink = pPinNode2;
                    break;
                case KSPIN_COMMUNICATION_BOTH:
                case KSPIN_COMMUNICATION_SOURCE:
                    pConnectNode->pPinNodeSource = pPinNode2;
                    pConnectNode->pPinNodeSink = pPinNode1;
                    break;
                default:
                    ASSERT(FALSE);
                    Status = STATUS_INVALID_PARAMETER;
                    goto exit;
            }
            break;
        case KSPIN_COMMUNICATION_SINK:
            pConnectNode->pPinNodeSink = pPinNode1;
            pConnectNode->pPinNodeSource = pPinNode2;
            ASSERT(
              pPinNode2->pPinInfo->Communication == KSPIN_COMMUNICATION_BOTH ||
              pPinNode2->pPinInfo->Communication == KSPIN_COMMUNICATION_SOURCE);
            break;
        case KSPIN_COMMUNICATION_SOURCE:
            pConnectNode->pPinNodeSink = pPinNode2;
            pConnectNode->pPinNodeSource = pPinNode1;
            ASSERT(
              pPinNode2->pPinInfo->Communication == KSPIN_COMMUNICATION_SINK ||
              pPinNode2->pPinInfo->Communication == KSPIN_COMMUNICATION_BOTH);
            break;
        default:
            ASSERT(FALSE);
            Status = STATUS_INVALID_PARAMETER;
            goto exit;
    }
    Status = CConnectInfo::Create(
      pConnectNode, 
      pLogicalFilterNode,
      pConnectNodeNext->GetConnectInfo(),
      pGraphPinInfo,
      ulFlagsCurrent,
      pGraphNode);

    if(!NT_SUCCESS(Status)) {
        Trap();
        goto exit;
    }
    if(pLogicalFilterNode->GetFlags() & LFN_FLAGS_NO_BYPASS) {
        Status = pGraphNode->lstLogicalFilterNodeNoBypass.AddList(
              pLogicalFilterNode,
          pConnectNode);

        if(!NT_SUCCESS(Status)) {
            Trap();
            goto exit;
        }
    }
    DPF3(80, "CConnectNode::Create %08x PN %08x %08x",
      pConnectNode,
      pConnectNode->pPinNodeSink,
      pConnectNode->pPinNodeSource);
exit:
    if(!NT_SUCCESS(Status)) {
        if (pConnectNode) {
            pConnectNode->Destroy();
        }
        pConnectNode = NULL;
    }
    *ppConnectNode = pConnectNode;
    return(Status);
}

CConnectNode::CConnectNode(
    PCONNECT_NODE pConnectNodeNext
)
{
    this->pConnectNodeNext = pConnectNodeNext;
    pConnectNodeNext->AddRef();
    AddRef();
    DPF1(80, "CConnectNode:%08x PN:%08x %08x", this);
}

CConnectNode::~CConnectNode(
)
{
    Assert(this);
    DPF1(80, "~CConnectNode: %08x", this);
    pConnectInfo->Destroy();
    pConnectNodeNext->Destroy();
}

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