windows-xp/Source/XPSP1/NT/drivers/wdm/audio/sysaudio/ci.cpp

//---------------------------------------------------------------------------
//
//  Module:   ci.cpp
//
//  Description:
//
//	Connect Info Class
//
//@@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
CConnectInfo::Create(
    PCONNECT_NODE pConnectNode,
    PLOGICAL_FILTER_NODE pLogicalFilterNode,
    PCONNECT_INFO pConnectInfoNext,
    PGRAPH_PIN_INFO pGraphPinInfo,
    ULONG ulFlagsCurrent,
    PGRAPH_NODE pGraphNode
)
{
    NTSTATUS Status = STATUS_SUCCESS;
    PCONNECT_INFO pConnectInfo;

    Assert(pGraphNode);
    Assert(pConnectNode);

    FOR_EACH_LIST_ITEM(&pGraphNode->lstConnectInfo, pConnectInfo) {

	if(pConnectInfo->pPinInfoSource ==
	   pConnectNode->pPinNodeSource->pPinInfo &&
	   pConnectInfo->pPinInfoSink ==
	   pConnectNode->pPinNodeSink->pPinInfo) {

	    if(pConnectInfo->pConnectInfoNext->IsSameGraph(pConnectInfoNext)) {
		pConnectInfo->AddRef();
		ASSERT(NT_SUCCESS(Status));
		goto exit;
	    }
	}

    } END_EACH_LIST_ITEM

    pConnectInfo = new CONNECT_INFO(
      pConnectNode,
      pConnectInfoNext,
      pGraphPinInfo,
      pGraphNode);

    if(pConnectInfo == NULL) {
	Status = STATUS_INSUFFICIENT_RESOURCES;
	goto exit;
    }
    if(ulFlagsCurrent & LFN_FLAGS_CONNECT_NORMAL_TOPOLOGY) {
	BOOL fReserve = FALSE;

	if(pLogicalFilterNode->GetOrder() <= ORDER_MIXER) {
	    pConnectInfo->ulFlags |= CI_FLAGS_LIMIT_FORMAT;
	}
	else {
	    pConnectInfo->ulFlags |= CI_FLAGS_CONNECT_TOP_DOWN;
	}
	//
	// Reserve pins for the filters below the mixer or splitter (if one)
	//
	if(ulFlagsCurrent & LFN_FLAGS_CONNECT_CAPTURE) {
	    if(pLogicalFilterNode->GetOrder() <= ORDER_SPLITTER) {
		pConnectInfo->ulFlags |= CI_FLAGS_REUSE_FILTER_INSTANCE;
		if(gcSplitters > 0) {
		    fReserve = TRUE;
		}
	    }
	}
	if(ulFlagsCurrent & LFN_FLAGS_CONNECT_RENDER) {
	    if(pLogicalFilterNode->GetOrder() <= ORDER_MIXER) {
		pConnectInfo->ulFlags |= CI_FLAGS_REUSE_FILTER_INSTANCE;
		if(gcMixers > 0) {
		    fReserve = TRUE;
		}
	    }
	}
	if(fReserve) {
	    Status = pConnectInfo->ReservePinInstance(pGraphNode);
	    if(!NT_SUCCESS(Status)) {
		Trap();
		goto exit;
	    }
	}
    }
    DPF2(80, "CConnectInfo::Create %08x GN %08x", pConnectInfo, pGraphNode);
exit:
    pConnectNode->pConnectInfo = pConnectInfo;
    return(Status);
}

CConnectInfo::CConnectInfo(
    PCONNECT_NODE pConnectNode,
    PCONNECT_INFO pConnectInfoNext,
    PGRAPH_PIN_INFO pGraphPinInfo,
    PGRAPH_NODE pGraphNode
)
{
    Assert(pGraphNode);
    Assert(pConnectNode);

    this->pPinInfoSource = pConnectNode->pPinNodeSource->pPinInfo;
    this->pPinInfoSink = pConnectNode->pPinNodeSink->pPinInfo;
    this->pGraphPinInfo = pGraphPinInfo;
    pGraphPinInfo->AddRef();
    this->pConnectInfoNext = pConnectInfoNext;
    pConnectInfoNext->AddRef();
    AddList(&pGraphNode->lstConnectInfo);
    AddRef();
    DPF2(80, "CConnectInfo: %08x GN %08x", this, pGraphNode);
}

CConnectInfo::~CConnectInfo(
)
{
    DPF1(80, "~CConnectInfo: %08x", this);
    Assert(this);
    RemoveList();
    pGraphPinInfo->Destroy();
    pConnectInfoNext->Destroy();
}

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

#ifdef DEBUG

ENUMFUNC
CConnectInfo::Dump(
)
{
    // .sgv or .so
    if(ulDebugFlags & (DEBUG_FLAGS_VERBOSE | DEBUG_FLAGS_OBJECT)) {
	dprintf("CI: %08x cRef %08x CNI %08x%s%s%s%s\n",
	  this,
	  cReference,
	  pConnectNodeInstance,
	  IsTopDown() ? " TOP_DOWN" : "",
	  IsLimitFormat() ? " LIMIT" : "",
	  IsReuseFilterInstance() ? " REUSE" : "",
	  IsPinInstanceReserved() ? " RESERVED" : "");
    }
    // .sg
    else {
	dprintf("CI: %08x CNI %08x P%-2d C%-d%s%s%s%s\n",
	  this,
	  pConnectNodeInstance,
	  GetPinInstances()->PossibleCount,
	  GetPinInstances()->CurrentCount,
	  IsTopDown() ? " TOP_DOWN" : "",
	  IsLimitFormat() ? " LIMIT" : "",
	  IsReuseFilterInstance() ? " REUSE" : "",
	  IsPinInstanceReserved() ? " RESERVED" : "");
    }
    dprintf("    Source: %08x #%d %s\n",
      pPinInfoSource,
      pPinInfoSource->PinId,
      pPinInfoSource->pFilterNode->DumpName());
    dprintf("    Sink:   %08x #%d %s\n",
      pPinInfoSink,
      pPinInfoSink->PinId,
      pPinInfoSink->pFilterNode->DumpName());

    if(ulDebugFlags & (DEBUG_FLAGS_VERBOSE | DEBUG_FLAGS_OBJECT)) {
	pGraphPinInfo->Dump();
    }
    return(STATUS_CONTINUE);
}

#endif