vpstrm.cpp

传说中的 视频抓取驱动源码 啊啊啊啊啊啊啊啊啊啊啊啊啊

//==========================================================================;
//
//  CWDMVideoPortStream - Video Port Stream class implementation
//
//      $Date:   05 Aug 1998 11:11:22  $
//  $Revision:   1.0  $
//    $Author:   Tashjian  $
//
// $Copyright:  (c) 1997 - 1998  ATI Technologies Inc.  All Rights Reserved.  $
//
//==========================================================================;

extern "C"
{
#include "strmini.h"
#include "ksmedia.h"
}

#include "wdmvdec.h"
#include "wdmdrv.h"
#include "aticonfg.h"
#include "capdebug.h"


CWDMVideoPortStream::CWDMVideoPortStream(PHW_STREAM_OBJECT pStreamObject, 
                        CWDMVideoDecoder * pVideoDecoder,
                        PUINT puiErrorCode)
    :   CWDMVideoStream(pStreamObject, pVideoDecoder, puiErrorCode)
{
    DBGTRACE(("CWDMVideoPortStream::CWDMVideoPortStream()\n"));

    int StreamNumber = pStreamObject->StreamNumber;
        
    if (StreamNumber == STREAM_VPVideo)
    {
    }
    else if (StreamNumber == STREAM_VPVBI)
    {
    }

    *puiErrorCode = WDMMINI_NOERROR;
}


CWDMVideoPortStream::~CWDMVideoPortStream()
{
    DBGTRACE(("CWDMVideoPortStream::~CWDMVideoPortStream()\n"));

    if (m_Registered)
    {
        m_pVideoPort->UnregisterForDirectDrawEvents( this);
    }
}


VOID STREAMAPI CWDMVideoPortStream::VideoReceiveDataPacket(IN PHW_STREAM_REQUEST_BLOCK pSrb)
{  
    DBGERROR(("Unexpected data packet on non VP stream.\n"));
    ASSERT(0);
}

/*
** VideoSetProperty()
**
**    Routine to process video property requests
**
** Arguments:
**
**    pSrb - pointer to the stream request block for properties
**
** Returns:
**
** Side Effects:  none
*/

VOID CWDMVideoPortStream::VideoSetProperty(PHW_STREAM_REQUEST_BLOCK pSrb)
{
    PSTREAM_PROPERTY_DESCRIPTOR pSPD = pSrb->CommandData.PropertyInfo;

    if (IsEqualGUID (KSPROPSETID_VPConfig, pSPD->Property->Set)) {
        SetVideoPortProperty (pSrb);
    }
    else if (IsEqualGUID (KSPROPSETID_VPVBIConfig, pSPD->Property->Set)) {
        SetVideoPortVBIProperty (pSrb);
    }
    else {
       pSrb->Status = STATUS_NOT_IMPLEMENTED;
    }
}

/*
** VideoGetProperty()
**
**    Routine to process video property requests
**
** Arguments:
**
**    pSrb - pointer to the stream request block for properties
**
** Returns:
**
** Side Effects:  none
*/

VOID CWDMVideoPortStream::VideoGetProperty(PHW_STREAM_REQUEST_BLOCK pSrb)
{
    PSTREAM_PROPERTY_DESCRIPTOR pSPD = pSrb->CommandData.PropertyInfo;

    if (IsEqualGUID (KSPROPSETID_Connection, pSPD->Property->Set)) {
        VideoStreamGetConnectionProperty (pSrb);
    }
    else if (IsEqualGUID (KSPROPSETID_VPConfig, pSPD->Property->Set)) {
        m_pDevice->GetVideoPortProperty (pSrb);
    }
    else if (IsEqualGUID (KSPROPSETID_VPVBIConfig, pSPD->Property->Set)) {
        m_pDevice->GetVideoPortVBIProperty (pSrb);
    }
    else {
        pSrb->Status = STATUS_NOT_IMPLEMENTED;
    }
}

/*
** VideoSetState()
**
**    Sets the current state of the requested stream
**
** Arguments:
**
**    pSrb - pointer to the stream request block for properties
**
** Returns:
**
** Side Effects:  none
*/

VOID CWDMVideoPortStream::VideoSetState(PHW_STREAM_REQUEST_BLOCK pSrb, BOOL bVPConnected, BOOL bVPVBIConnected)
{
    //
    // For each stream, the following states are used:
    // 
    // Stop:    Absolute minimum resources are used.  No outstanding IRPs.
    // Pause:   Getting ready to run.  Allocate needed resources so that 
    //          the eventual transition to Run is as fast as possible.
    //          SRBs will be queued at either the Stream class or in your
    //          driver.
    // Run:     Streaming. 
    //
    // Moving to Stop or Run ALWAYS transitions through Pause, so that ONLY 
    // the following transitions are possible:
    //
    // Stop -> Pause
    // Pause -> Run
    // Run -> Pause
    // Pause -> Stop
    //
    // Note that it is quite possible to transition repeatedly between states:
    // Stop -> Pause -> Stop -> Pause -> Run -> Pause -> Run -> Pause -> Stop
    //

    DBGINFO(("CWDMVideoPortStream::VideoSetState for stream %d\n", pSrb->StreamObject->StreamNumber));

    pSrb->Status = STATUS_SUCCESS;

    switch (pSrb->CommandData.StreamState)  

    {
        case KSSTATE_STOP:
            DBGINFO(("   state KSSTATE_STOP"));
            m_pDevice->SetOutputEnabled(FALSE);

            // Reset the overridden flag so that the next time we go to the
            // Run state, output will be enabled (unless the app overrides
            // it again later). We should really do this after the graph
            // has been stopped so that if a filter that has yet to be stopped
            // cleans up by clearing the flag, it is not considered to be
            // overriding it again. Since we are not called after the graph
            // has been fully stopped, this is the best we can do.
            //
            // An alternative (and probably less confusing) approach is to
            // leave the overridden flag set and force the app to control
            // the output enabled feature if it changes it once.
            //
            // We have decided to follow the latter approach.

            // m_pDevice->SetOutputEnabledOverridden(FALSE);
            break;

        case KSSTATE_ACQUIRE:
            DBGINFO(("   state KSSTATE_ACQUIRE"));
            ASSERT(m_KSState == KSSTATE_STOP);
            break;

        case KSSTATE_PAUSE:
            DBGINFO(("   state KSSTATE_PAUSE"));
            
            if (m_pVideoDecoder->PreEventOccurred() &&
                (!m_pDevice->IsOutputEnabledOverridden() || m_pDevice->IsOutputEnabled()) &&
                        (m_KSState == KSSTATE_STOP || m_KSState == KSSTATE_ACQUIRE))
            {
                DBGERROR(("VpStrm Pause: Overridden = %d, OutputEnabled = %d",
                          m_pDevice->IsOutputEnabledOverridden(),
                          m_pDevice->IsOutputEnabled()
                        ));

                pSrb->Status = STATUS_UNSUCCESSFUL;
            }
            break;

        case KSSTATE_RUN:
            DBGINFO(("   state KSSTATE_RUN"));

            ASSERT(m_KSState == KSSTATE_ACQUIRE || m_KSState == KSSTATE_PAUSE);

            if (m_pVideoDecoder->PreEventOccurred() &&
                (!m_pDevice->IsOutputEnabledOverridden() ||
                                        m_pDevice->IsOutputEnabled()))
            {
                DBGERROR(("VpStrm Run: Overridden = %d, OutputEnabled = %d",
                          m_pDevice->IsOutputEnabledOverridden(),
                          m_pDevice->IsOutputEnabled()
                        ));
                pSrb->Status = STATUS_UNSUCCESSFUL;
            }
            else if (!m_pDevice->IsOutputEnabledOverridden())
                m_pDevice->SetOutputEnabled(TRUE);
            break;
    }

    if (pSrb->Status == STATUS_SUCCESS) {
        m_KSState = pSrb->CommandData.StreamState;
        DBGINFO((" entered\n"));
    }
    else
        DBGINFO((" NOT entered ***\n"));
}


VOID CWDMVideoPortStream::SetVideoPortProperty(PHW_STREAM_REQUEST_BLOCK pSrb)
{
    PSTREAM_PROPERTY_DESCRIPTOR pSpd = pSrb->CommandData.PropertyInfo;
    ULONG Id  = pSpd->Property->Id;            // index of the property
    ULONG nS  = pSpd->PropertyOutputSize;        // size of data supplied

    pSrb->Status = STATUS_SUCCESS;

    ASSERT (m_pDevice != NULL);
    switch (Id)
    {
    case KSPROPERTY_VPCONFIG_DDRAWHANDLE:
        ASSERT (nS >= sizeof(ULONG_PTR));

        if (!m_pVideoPort->ConfigDirectDrawHandle(*(PULONG_PTR)pSpd->PropertyInfo)) {
            pSrb->Status = STATUS_UNSUCCESSFUL;
            break;
        }
        
        if (!m_Registered) {
            m_Registered = m_pVideoPort->RegisterForDirectDrawEvents(this);
            if (!m_Registered) {
                pSrb->Status = STATUS_UNSUCCESSFUL;
                break;
            }
        }
        break;

    case KSPROPERTY_VPCONFIG_VIDEOPORTID:
        ASSERT (nS >= sizeof(ULONG));

        if (!m_pVideoPort->ConfigVideoPortHandle(*(PULONG)pSpd->PropertyInfo)) {
            pSrb->Status = STATUS_UNSUCCESSFUL;
        }
        break;

    case KSPROPERTY_VPCONFIG_DDRAWSURFACEHANDLE:
        ASSERT (nS >= sizeof(ULONG_PTR));
        {
            // This sample does not use the surface kernel handles,
            // but the validation is as follows.
            ULONG_PTR cHandles = *(PULONG_PTR)pSpd->PropertyInfo;
            if (nS != (cHandles + 1) * sizeof(ULONG_PTR)) {

                pSrb->Status = STATUS_INVALID_BUFFER_SIZE;
                break;
            }

            m_pVideoDecoder->ResetEvents();
        }
        break;

    case KSPROPERTY_VPCONFIG_SETCONNECTINFO :
        ASSERT (nS >= sizeof(ULONG));