windows-server-2003/multimedia/media/avi/avifile/avifps.cpp

// avifps.cpp - proxy and stub code for IAVIFile & IAVIStream
//
//
//  Copyright (c) 1993 - 1995 Microsoft Corporation.  All Rights Reserved.
//
// History:
//  Created by DavidMay         6/19/93
//
//
// What's in this file:
//
//  Code to enable "standard marshalling" of the IAVIFile and IAVIStream
//  interfaces, consisting of the following classes:
//
//  CPSFactory, derived from IPSFactory:
//      Proxy/stub factory, called from DllGetClassObject to create
//      the other classes.
//
//  CPrxAVIStream, derived from IAVIStream:
//      This class serves as a stand-in for the interface in the app that's
//      calling it.  Uses RPC to communicate with....
//
//  CStubAVIStream, derived from IRpcStubBuffer:
//      This class in the called app receives requests from the proxy
//      and forwards them to the actual implementation of the IAVIStream.
//
//  CPrxAVIFile & CStubAVIFile, just like the stream versions.
//
//
//  Also included:
//  The function TaskHasExistingProxies can be used by an application
//  before exiting to check whether any of its objects are being used
//  by other applications.  This is done by keeping track of what active
//  stubs exist within a given task context.
//

#include <win32.h>
#pragma warning(disable:4355)
#include <vfw.h>
#include "avifps.h"
#include "debug.h"

#include "olehack.h"

#ifndef _WIN32
#define PropagateResult(hrOld, scNew)   ResultFromScode(scNew)
#endif

// when thunking between 16-bit ansi and 32-bit unicode apps, the
// AVISTREAMINFO and AVIFILEINFO structures are different. What is transmitted
// is a common format that includes space for both unicode and ansi strings.
// ansi apps will not send or use the unicode strings. unicode apps will send
// both.

typedef struct _PS_STREAMINFO {
    DWORD               fccType;
    DWORD               fccHandler;
    DWORD               dwFlags;        /* Contains AVITF_* flags */
    DWORD               dwCaps;
    WORD                wPriority;
    WORD                wLanguage;
    DWORD               dwScale;
    DWORD               dwRate; /* dwRate / dwScale == samples/second */
    DWORD               dwStart;
    DWORD               dwLength; /* In units above... */
    DWORD               dwInitialFrames;
    DWORD               dwSuggestedBufferSize;
    DWORD               dwQuality;
    DWORD               dwSampleSize;
    POINTS              ptFrameTopLeft;
    POINTS              ptFrameBottomRight;
    DWORD               dwEditCount;
    DWORD               dwFormatChangeCount;
    char                szName[64];
    DWORD               bHasUnicode;
    WCHAR               szUnicodeName[64];
} PS_STREAMINFO, FAR * LPPS_STREAMINFO;

typedef struct _PS_FILEINFO {
    DWORD               dwMaxBytesPerSec;       // max. transfer rate
    DWORD               dwFlags;                // the ever-present flags
    DWORD               dwCaps;
    DWORD               dwStreams;
    DWORD               dwSuggestedBufferSize;

    DWORD               dwWidth;
    DWORD               dwHeight;

    DWORD               dwScale;        
    DWORD               dwRate; /* dwRate / dwScale == samples/second */
    DWORD               dwLength;

    DWORD               dwEditCount;

    char                szFileType[64];         // descriptive string for file type?
    DWORD               bHasUnicode;
    WCHAR               szUnicodeType[64];      
} PS_FILEINFO, FAR * LPPS_FILEINFO;



#ifndef _WIN32
//
// These constants are defined in the 32-bit UUID.LIB, but not
// in any 16-bit LIB.  They are stolen here from the .IDL files
// in the TYPES project.
//
extern "C" {
const IID IID_IRpcStubBuffer = {0xD5F56AFC,0x593b,0x101A,{0xB5,0x69,0x08,0x00,0x2B,0x2D,0xBF,0x7A}};
const IID IID_IRpcProxyBuffer = {0xD5F56A34,0x593b,0x101A,{0xB5,0x69,0x08,0x00,0x2B,0x2D,0xBF,0x7A}};
const IID IID_IPSFactoryBuffer = {0xD5F569D0,0x593b,0x101A,{0xB5,0x69,0x08,0x00,0x2B,0x2D,0xBF,0x7A}};
}
#endif

// functions for proxy/stub usage tracking; see end of this file.
void UnregisterStubUsage(void);
void RegisterStubUsage(void);
extern "C" BOOL FAR TaskHasExistingProxies(void);



#if 0   // this function is actually in classobj.cpp,
// but if this were a separate proxy/stub DLL, it would look like this.
STDAPI DllGetClassObject(const CLSID FAR&       rclsid,
                         const IID FAR& riid,
                         void FAR* FAR* ppv)
{
    HRESULT     hresult;

    DPF("DllGetClassObject\n");

    if (rclsid == CLSID_AVIStreamPS) {
        return (*ppv = (LPVOID)new CPSFactory()) != NULL
                ? NOERROR : ResultFromScode(E_OUTOFMEMORY);
    } else {
        return ResultFromScode(E_UNEXPECTED);
    }
}
#endif

/*
 *      IMPLEMENTATION of CPSFactory
 *
 *
 *  Note: This Factory supports proxies and stubs for two separate
 *  interfaces, IID_IAVIFile and IID_IAVIStream.
 */

CPSFactory::CPSFactory(void)
{
    m_refs = 1;
}



// controlling unknown for PSFactory
STDMETHODIMP CPSFactory::QueryInterface(REFIID iid, LPVOID FAR* ppv)
{
    if (iid == IID_IUnknown || iid == IID_IPSFactoryBuffer)
    {
        *ppv = this;
        ++m_refs;
        return NOERROR;
    }
    else
    {
        *ppv = NULL;
        return ResultFromScode(E_NOINTERFACE);
    }
}

STDMETHODIMP_(ULONG) CPSFactory::AddRef(void)
{
    return ++m_refs;
}

STDMETHODIMP_(ULONG) CPSFactory::Release(void)
{
    if (--m_refs == 0)
    {
        delete this;
        return 0;
    }

    return m_refs;
}


// create proxy for given interface
STDMETHODIMP CPSFactory::CreateProxy(IUnknown FAR* pUnkOuter, REFIID iid,
        IRpcProxyBuffer FAR* FAR* ppProxy, void FAR* FAR* ppv)
{
    IRpcProxyBuffer FAR* pProxy;
    HRESULT     hresult;

    *ppProxy = NULL;
    *ppv = NULL;

    if (pUnkOuter == NULL)
        return ResultFromScode(E_INVALIDARG);

    if (iid == IID_IAVIStream) {
        if ((pProxy = CPrxAVIStream::Create(pUnkOuter)) == NULL)
            return ResultFromScode(E_OUTOFMEMORY);
    } else if (iid == IID_IAVIFile) {
        if ((pProxy = CPrxAVIFile::Create(pUnkOuter)) == NULL)
            return ResultFromScode(E_OUTOFMEMORY);
    } else
        return ResultFromScode(E_NOINTERFACE);

    hresult = pProxy->QueryInterface(iid, ppv);

    if (hresult == NOERROR)
        *ppProxy = pProxy;                      // transfer ref to caller
    else
        pProxy->Release();                      // free proxy just created

    return hresult;
}



// create stub for given interface
STDMETHODIMP CPSFactory::CreateStub(REFIID iid, IUnknown FAR* pUnkServer, IRpcStubBuffer FAR* FAR* ppStub)
{
    if (iid == IID_IAVIStream) {
        return CStubAVIStream::Create(pUnkServer, ppStub);
    } else if (iid == IID_IAVIFile) {
        return CStubAVIFile::Create(pUnkServer, ppStub);
    } else {
        *ppStub = NULL;
        return ResultFromScode(E_NOINTERFACE);
    }
}





/*
 *  IMPLEMENTATION of CPrxAVIStream
 *
 */


// create unconnected CPrxAVIStream; return controlling IProxy/IUnknokwn FAR*
IRpcProxyBuffer FAR* CPrxAVIStream::Create(IUnknown FAR* pUnkOuter)
{
    CPrxAVIStream FAR* pPrxAVIStream;

    if ((pPrxAVIStream = new CPrxAVIStream(pUnkOuter)) == NULL)
        return NULL;

    return &pPrxAVIStream->m_Proxy;
}


CPrxAVIStream::CPrxAVIStream(IUnknown FAR* pUnkOuter) : m_Proxy(this)
{
    // NOTE: could assert here since we should always be aggregated
    if (pUnkOuter == NULL)
        pUnkOuter = &m_Proxy;

    m_refs = 1;
    m_pUnkOuter = pUnkOuter;
    m_pRpcChannelBuffer = NULL;
    m_sh.fccType = 0;

    InitOle(TRUE);

    DPF("PrxStream %p: Usage++=%lx\n", (DWORD_PTR) (LPVOID) this, 1L);
}


CPrxAVIStream::~CPrxAVIStream(void)
{
    m_Proxy.Disconnect();

    TermOle();
}
                

// Methods for controlling unknown
STDMETHODIMP CPrxAVIStream::CProxyImpl::QueryInterface(REFIID iid, LPVOID FAR* ppv)
{
    if (iid == IID_IUnknown || iid == IID_IRpcProxyBuffer)
        *ppv = (void FAR *)this;
    else if (iid ==  IID_IAVIStream)
        *ppv = (void FAR *)m_pPrxAVIStream;
    else {
        *ppv = NULL;
        return ResultFromScode(E_NOINTERFACE);
    }

    // simplest way to be correct: always addref the pointer we will return;
    // easy since all interfaces here are derived from IUnknown.
    ((IUnknown FAR*) *ppv)->AddRef();

    return NOERROR;
}

STDMETHODIMP_(ULONG) CPrxAVIStream::CProxyImpl::AddRef(void)
{
    return ++m_pPrxAVIStream->m_refs;
}

STDMETHODIMP_(ULONG) CPrxAVIStream::CProxyImpl::Release(void)
{
    if (--m_pPrxAVIStream->m_refs == 0)
    {
        delete m_pPrxAVIStream;
        return 0;
    }
    return m_pPrxAVIStream->m_refs;
}


// connect proxy to channel given
STDMETHODIMP CPrxAVIStream::CProxyImpl::Connect(IRpcChannelBuffer FAR* pRpcChannelBuffer)
{
    if (m_pPrxAVIStream->m_pRpcChannelBuffer != NULL)
        return ResultFromScode(E_UNEXPECTED);

    if (pRpcChannelBuffer == NULL)
        return ResultFromScode(E_INVALIDARG);

    (m_pPrxAVIStream->m_pRpcChannelBuffer = pRpcChannelBuffer)->AddRef();
    return NOERROR;
}


// disconnect proxy from any current channel
STDMETHODIMP_(void) CPrxAVIStream::CProxyImpl::Disconnect(void)
{
    if (m_pPrxAVIStream->m_pRpcChannelBuffer)
    {
        m_pPrxAVIStream->m_pRpcChannelBuffer->Release();
        m_pPrxAVIStream->m_pRpcChannelBuffer = NULL;
    }
}



// IUnknown methods for external interface(s); always delegate
STDMETHODIMP CPrxAVIStream::QueryInterface(REFIID iid, LPVOID FAR* ppv)
{
    return m_pUnkOuter->QueryInterface(iid, ppv);
}

STDMETHODIMP_(ULONG) CPrxAVIStream::AddRef(void)
{
    DPF("PrxStream %p: Usage++=%lx\n", (DWORD_PTR) (LPVOID) this, m_refs + 1);
    return m_pUnkOuter->AddRef();
}

STDMETHODIMP_(ULONG) CPrxAVIStream::Release(void)
{
    DPF("PrxStream %p: Usage--=%lx\n", (DWORD_PTR) (LPVOID) this, m_refs - 1);
    return m_pUnkOuter->Release();
}



// IAVIStream interface methods

STDMETHODIMP CPrxAVIStream::Create(LPARAM lParam1, LPARAM lParam2)
{
    return ResultFromScode(E_NOTIMPL);
}

#ifdef _WIN32
STDMETHODIMP CPrxAVIStream::Info(AVISTREAMINFOW FAR * psi, LONG lSize)
#else
STDMETHODIMP CPrxAVIStream::Info(AVISTREAMINFO FAR * psi, LONG lSize)
#endif
{
    HRESULT hrMarshal;
    HRESULT hrMethod = NOERROR;
    IRpcChannelBuffer FAR* pChannel = m_pRpcChannelBuffer;
    RPCOLEMESSAGE Message;

    _fmemset(&Message, 0, sizeof(Message));

    if (pChannel == NULL)
        return ResultFromScode(RPC_E_CONNECTION_TERMINATED);

    //
    // NOTE: We take advantage here of the fact that we assume the
    // stream is read-only and not being changed on the other end!
    //
    // To avoid some intertask calls, we assume that the result
    // of the Info() method will not change.
    //
    if (m_sh.fccType == 0) {

        // we might be talking to 16 or 32-bit stub, so we need to
        // exchange a common (superset) format and pick out the bits we need.

        // format in: lSize
        // format out: PS_STREAMINFO, hrMethod
        Message.cbBuffer = sizeof(lSize);
        Message.iMethod = IAVISTREAM_Info;
        
        if ((hrMarshal = pChannel->GetBuffer(&Message, IID_IAVIStream)) != NOERROR)
            goto ErrExit;

        ((DWORD FAR *)Message.Buffer)[0] = sizeof(PS_STREAMINFO);
        
        if ((hrMarshal = pChannel->SendReceive(&Message,(ULONG*) &hrMethod)) != NOERROR) {
            ;
ErrExit:
            return PropagateResult(hrMarshal, RPC_E_CLIENT_CANTMARSHAL_DATA);
        }

        hrMethod = ((HRESULT FAR *)Message.Buffer)[0];
        PS_STREAMINFO FAR * psinfo = (PS_STREAMINFO FAR *)
                        ((LPBYTE)Message.Buffer + sizeof(HRESULT));

        // get the bits we want
        m_sh.fccType    = psinfo->fccType;
        m_sh.fccHandler = psinfo->fccHandler;
        m_sh.dwFlags    = psinfo->dwFlags;        /* Contains AVITF_* flags */
        m_sh.dwCaps     = psinfo->dwCaps;
        m_sh.wPriority  = psinfo->wPriority;
        m_sh.wLanguage  = psinfo->wLanguage;
        m_sh.dwScale    = psinfo->dwScale;
        m_sh.dwRate     = psinfo->dwRate; /* dwRate / dwScale == samples/second */
        m_sh.dwStart    = psinfo->dwStart;
        m_sh.dwLength   = psinfo->dwLength; /* In units above... */
        m_sh.dwInitialFrames = psinfo->dwInitialFrames;
        m_sh.dwSuggestedBufferSize = psinfo->dwSuggestedBufferSize;
        m_sh.dwQuality  = psinfo->dwQuality;
        m_sh.dwSampleSize = psinfo->dwSampleSize;

        // RECTs are different sizes, so use POINTS (WORD point)
        m_sh.rcFrame.top = psinfo->ptFrameTopLeft.y;    
        m_sh.rcFrame.left = psinfo->ptFrameTopLeft.x;
        m_sh.rcFrame.bottom = psinfo->ptFrameBottomRight.y;     
        m_sh.rcFrame.right = psinfo->ptFrameBottomRight.x;

        m_sh.dwEditCount = psinfo->dwEditCount;
        m_sh.dwFormatChangeCount = psinfo->dwFormatChangeCount;

#ifdef _WIN32   
        // use unicode if we've been sent it
        if (psinfo->bHasUnicode) {
            _fmemcpy(m_sh.szName, psinfo->szUnicodeName, sizeof(m_sh.szName));
        } else {
            // need ansi->unicode thunk
            MultiByteToWideChar(
                CP_ACP, 0,
                psinfo->szName,
                -1,
                m_sh.szName,
                NUMELMS(m_sh.szName));
        }
#else
        // we only use the ansi which is always sent
        _fmemcpy(m_sh.szName, psinfo->szName, sizeof(m_sh.szName));
#endif

        pChannel->FreeBuffer(&Message);
    }

    _fmemcpy(psi, &m_sh, min((int) lSize, sizeof(m_sh)));

    return hrMethod;
}


STDMETHODIMP_(LONG) CPrxAVIStream::FindSample(LONG lPos, LONG lFlags)
{
    HRESULT hrMarshal;
    HRESULT hrMethod;
    IRpcChannelBuffer FAR* pChannel = m_pRpcChannelBuffer;
    LONG    lResult;

    if (pChannel == NULL)
        return -1; // !!! ResultFromScode(RPC_E_CONNECTION_TERMINATED);

    RPCOLEMESSAGE Message;

    _fmemset(&Message, 0, sizeof(Message));

    // format in: lPos, lFlags
    // format out: hrMethod, lResult
    Message.cbBuffer = sizeof(lPos) + sizeof(lFlags);
    Message.iMethod = IAVISTREAM_FindSample;

    if ((hrMarshal = pChannel->GetBuffer(&Message, IID_IAVIStream)) != NOERROR)
        goto ErrExit;

    ((DWORD FAR *)Message.Buffer)[0] = lPos;
    ((DWORD FAR *)Message.Buffer)[1] = lFlags;

    if ((hrMarshal = pChannel->SendReceive(&Message, (ULONG*) &hrMethod)) != NOERROR) {
        goto ErrExit;
    }

    hrMethod = ((HRESULT FAR *)Message.Buffer)[0];
    lResult = ((LONG FAR *)Message.Buffer)[1];

    pChannel->FreeBuffer(&Message);

    DPF("Proxy: FindSample (%ld) returns (%ld)\n", lPos, lResult);
    return lResult; // !!! hrMethod;

ErrExit:
    DPF("Proxy: FindSample returning error...\n");
    return -1; // !!! PropagateResult(hrMarshal, RPC_E_CLIENT_CANTMARSHAL_DATA);
}


STDMETHODIMP CPrxAVIStream::ReadFormat(LONG lPos, LPVOID lpFormat, LONG FAR *lpcbFormat)
{
    HRESULT hrMarshal;
    HRESULT hrMethod;
    IRpcChannelBuffer FAR* pChannel = m_pRpcChannelBuffer;

    if (pChannel == NULL)
        return ResultFromScode(RPC_E_CONNECTION_TERMINATED);

    // check that size is 0 if pointer is null
    if (lpFormat == NULL) {
        *lpcbFormat = 0;
    }

    // format in: dw, *lpcbFormat
    // format out: hrMethod, *lpcbFormat, format data

    RPCOLEMESSAGE Message;

    _fmemset(&Message, 0, sizeof(Message));

    Message.cbBuffer = sizeof(lPos) + sizeof(*lpcbFormat);
    Message.iMethod = IAVISTREAM_ReadFormat;

    if ((hrMarshal = pChannel->GetBuffer(&Message, IID_IAVIStream)) != NOERROR)
        goto ErrExit;

    ((DWORD FAR *)Message.Buffer)[0] = lPos;
    ((DWORD FAR *)Message.Buffer)[1] = lpFormat ? *lpcbFormat : 0;

    if ((hrMarshal = pChannel->SendReceive(&Message, (ULONG*) &hrMethod)) != NOERROR) {
        goto ErrExit;
    }

    hrMethod = ((HRESULT FAR *)Message.Buffer)[0];

    if (lpFormat && *lpcbFormat && hrMethod == NOERROR)
        hmemcpy(lpFormat, (LPBYTE) Message.Buffer + 2*sizeof(DWORD),
                min(*lpcbFormat, (long) ((DWORD FAR *) Message.Buffer)[1]));

    // write the size last, so we don't copy more than user's buffer
    *lpcbFormat = ((DWORD FAR *)Message.Buffer)[1];

    pChannel->FreeBuffer(&Message);

    return hrMethod;

ErrExit:
    return PropagateResult(hrMarshal, RPC_E_CLIENT_CANTMARSHAL_DATA);
}


STDMETHODIMP CPrxAVIStream::Read(
                 LONG       lStart,
                 LONG       lSamples,
                 LPVOID     lpBuffer,
                 LONG       cbBuffer,
                 LONG FAR * plBytes,
                 LONG FAR * plSamples)
{
    HRESULT hrMarshal;
    HRESULT hrMethod;
    IRpcChannelBuffer FAR* pChannel = m_pRpcChannelBuffer;
    LONG    lTemp;

    if (pChannel == NULL)
        return ResultFromScode(RPC_E_CONNECTION_TERMINATED);

    if (lpBuffer == NULL)
        cbBuffer = 0;

    // format on input: lPos, lLength, cb
    // format on output: hresult, samples, cb, frame
    RPCOLEMESSAGE Message;

    _fmemset(&Message, 0, sizeof(Message));

    Message.cbBuffer = sizeof(lStart) + sizeof(lSamples) + sizeof(cbBuffer);
    Message.iMethod = IAVISTREAM_Read;

    if ((hrMarshal = pChannel->GetBuffer(&Message, IID_IAVIStream)) != NOERROR)
        goto ErrExit;

    ((DWORD FAR *)Message.Buffer)[0] = lStart;
    ((DWORD FAR *)Message.Buffer)[1] = lSamples;
    ((DWORD FAR *)Message.Buffer)[2] = lpBuffer ? cbBuffer : 0;

    if ((hrMarshal = pChannel->SendReceive(&Message, (ULONG*) &hrMethod)) != NOERROR) {
        goto ErrExit;
    }

    hrMethod = ((HRESULT FAR *)Message.Buffer)[0];

    lTemp = ((DWORD FAR *)Message.Buffer)[1];
    if (plBytes)
        *plBytes = lTemp;

    if (plSamples)
        *plSamples = ((DWORD FAR *)Message.Buffer)[2];

    if (lpBuffer && lTemp && hrMethod == NOERROR)
        hmemcpy(lpBuffer, (LPBYTE) Message.Buffer + 3*sizeof(DWORD), lTemp);

    pChannel->FreeBuffer(&Message);

    return hrMethod;

ErrExit:
    return PropagateResult(hrMarshal, RPC_E_CLIENT_CANTMARSHAL_DATA);
}

//
// All of the writing-related messages are not remoted....
//
STDMETHODIMP CPrxAVIStream::SetFormat(LONG lPos,LPVOID lpFormat,LONG cbFormat)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::Write(LONG lStart,
                                  LONG lSamples,
                                  LPVOID lpData,
                                  LONG cbData,
                                  DWORD dwFlags,
                                  LONG FAR *plSampWritten,
                                  LONG FAR *plBytesWritten)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::Delete(LONG lStart,LONG lSamples)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::ReadData(DWORD ckid, LPVOID lp, LONG FAR *lpcb)
{
    // !!! This should really be remoted!
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::WriteData(DWORD ckid, LPVOID lp, LONG cb)
{
    return ResultFromScode(E_NOTIMPL);
}


#ifdef _WIN32
STDMETHODIMP CPrxAVIStream::SetInfo(AVISTREAMINFOW FAR *lpInfo, LONG cbInfo)
{
    return ResultFromScode(E_NOTIMPL);
}

#else
STDMETHODIMP CPrxAVIStream::Reserved1(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::Reserved2(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::Reserved3(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::Reserved4(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIStream::Reserved5(void)
{
    return ResultFromScode(E_NOTIMPL);
}

#endif


/*
 *  IMPLEMENTATION of CStubAVIStream
 *      
 */

// create connected interface stub
HRESULT CStubAVIStream::Create(IUnknown FAR* pUnkObject, IRpcStubBuffer FAR* FAR* ppStub)
{
    CStubAVIStream FAR* pStubAVIStream;

    *ppStub = NULL;

    if ((pStubAVIStream = new CStubAVIStream()) == NULL)
        return ResultFromScode(E_OUTOFMEMORY);

    HRESULT hresult;
    if ((hresult = pStubAVIStream->Connect(pUnkObject)) != NOERROR)
    {
        pStubAVIStream->Release();
        return hresult;
    }

    *ppStub = pStubAVIStream;
    return NOERROR;
}


CStubAVIStream::CStubAVIStream(void)
{
    m_refs       = 1; /// !!! ??? 0
    DPF("StubStream %p: Usage++=%lx  (C)\n", (DWORD_PTR) (LPVOID) this, 1L);
    m_pAVIStream = NULL;
    RegisterStubUsage();
    InitOle(TRUE);
}


CStubAVIStream::~CStubAVIStream(void)
{
    UnregisterStubUsage();
    Disconnect();
    TermOle();
}


// controling unknown methods for interface stub
STDMETHODIMP CStubAVIStream::QueryInterface(REFIID iid, LPVOID FAR* ppv)
{

    if (iid == IID_IUnknown || iid == IID_IRpcStubBuffer)
    {
        *ppv = this;
        DPF("StubStream %p: Usage++=%lx  (QI)\n", (DWORD_PTR) (LPVOID) this, m_refs + 1);
        ++m_refs;
        return NOERROR;
    }
    else
    {
        *ppv = NULL;
        return ResultFromScode(E_NOINTERFACE);
    }
}

STDMETHODIMP_(ULONG) CStubAVIStream::AddRef(void)
{
    DPF("StubStream %p: Usage++=%lx\n", (DWORD_PTR) (LPVOID) this, m_refs + 1);
    return ++m_refs;
}

STDMETHODIMP_(ULONG) CStubAVIStream::Release(void)
{
    DPF("StubStream %p: Usage--=%lx\n", (DWORD_PTR) (LPVOID) this, m_refs - 1);
    if (--m_refs == 0)
    {
        if (m_pAVIStream) {
            DPF("Releasing stream in funny place!\n");
            m_pAVIStream->Release();
            m_pAVIStream = NULL;
        }
        delete this;
        return 0;
    }

    return m_refs;
}


// connect interface stub to server object
STDMETHODIMP CStubAVIStream::Connect(IUnknown FAR* pUnkObj)
{
    HRESULT     hr;

    if (m_pAVIStream)
        // call Disconnect first
        return ResultFromScode(E_UNEXPECTED);

    if (pUnkObj == NULL)
        return ResultFromScode(E_INVALIDARG);
                
    // NOTE: QI ensures out param is zero if error
    hr = pUnkObj->QueryInterface(IID_IAVIStream, (LPVOID FAR*)&m_pAVIStream);

    DPF("CStubAVIStream::Connect: Result = %lx, stream = %p\n", hr, (DWORD_PTR) m_pAVIStream);
    return hr;
}


// disconnect interface stub from server objec
STDMETHODIMP_(void) CStubAVIStream::Disconnect(void)
{
    DPF("CStubAVIStream::Disconnect\n");
    if (m_pAVIStream) {
        DPF("Disconnect: Releasing stream\n");
        m_pAVIStream->Release();
        m_pAVIStream = NULL;
    }
}


// remove method call
STDMETHODIMP CStubAVIStream::Invoke
        (RPCOLEMESSAGE FAR *pMessage, IRpcChannelBuffer FAR *pChannel)
{
    HRESULT     hresult;
    HRESULT     hrMethod;

    DPF("!AVISTREAM: Invoke: ");

    if (!m_pAVIStream) {
        DPF("!No stream!\n");
        return ResultFromScode(RPC_E_UNEXPECTED);
    }

#if 0
    if (iid != IID_IAVIStream) {
        DPF("!Wrong interface\n");

        return ResultFromScode(RPC_E_UNEXPECTED);
    }
#endif

    switch (pMessage->iMethod)
    {
        case IAVISTREAM_Info:
            // format on input: lSize
            // format on output: hresult, PS_STREAMINFO
        {
            DWORD lSize;
#ifdef _WIN32
            AVISTREAMINFOW si;
#else
            AVISTREAMINFO si;
#endif

            DPF("!Info\n");

            // need to send a common ansi/unicode version with both strings
            PS_STREAMINFO psinfo;
            hrMethod = m_pAVIStream->Info(&si, sizeof(si));

            // copy all members
            psinfo.fccType      = si.fccType;
            psinfo.fccHandler   = si.fccHandler;
            psinfo.dwFlags      = si.dwFlags;        /* Contains AVITF_* flags */
            psinfo.dwCaps       = si.dwCaps;
            psinfo.wPriority    = si.wPriority;
            psinfo.wLanguage    = si.wLanguage;
            psinfo.dwScale      = si.dwScale;
            psinfo.dwRate       = si.dwRate; /* dwRate / dwScale == samples/second */
            psinfo.dwStart      = si.dwStart;
            psinfo.dwLength     = si.dwLength; /* In units above... */
            psinfo.dwInitialFrames      = si.dwInitialFrames;
            psinfo.dwSuggestedBufferSize        = si.dwSuggestedBufferSize;
            psinfo.dwQuality    = si.dwQuality;
            psinfo.dwSampleSize = si.dwSampleSize;
            psinfo.dwEditCount  = si.dwEditCount;
            psinfo.dwFormatChangeCount  = si.dwFormatChangeCount;

            // RECT is different size, so use POINTS
            psinfo.ptFrameTopLeft.x = (short) si.rcFrame.left;
            psinfo.ptFrameTopLeft.y = (short) si.rcFrame.top;
            psinfo.ptFrameBottomRight.x = (short) si.rcFrame.right;
            psinfo.ptFrameBottomRight.y = (short) si.rcFrame.bottom;

#ifdef _WIN32   
            // send both UNICODE and ansi
            hmemcpy(psinfo.szUnicodeName, si.szName, sizeof(psinfo.szUnicodeName));
            psinfo.bHasUnicode = TRUE;
            WideCharToMultiByte(CP_ACP, 0,
                si.szName,
                -1,
                psinfo.szName,
                NUMELMS(psinfo.szName),
                NULL, NULL);
#else
            // just send ansi version for 16-bit stub
            psinfo.bHasUnicode = FALSE;
            hmemcpy(psinfo.szName, si.szName, sizeof(si.szName));
#endif

            lSize = ((DWORD FAR *)pMessage->Buffer)[0];


            pMessage->cbBuffer = lSize + sizeof(hrMethod);
        
            if ((hresult = pChannel->GetBuffer(pMessage, IID_IAVIStream)) != NOERROR)
                return PropagateResult(hresult, RPC_E_SERVER_CANTUNMARSHAL_DATA);

            ((HRESULT FAR *)pMessage->Buffer)[0] = hrMethod;

            hmemcpy((LPBYTE) pMessage->Buffer + sizeof(hrMethod),
                    &psinfo,
                    lSize);
                
            return NOERROR;
        }

        case IAVISTREAM_FindSample:
            // format on input: lPos, lFlags
            // format on output: hResult, lResult
        {
            LONG lPos, lFlags, lResult;

            lPos = ((DWORD FAR *)pMessage->Buffer)[0];
            lFlags = ((DWORD FAR *)pMessage->Buffer)[1];

            DPF("!FindSample (%ld)\n", lPos);
        
            lResult = m_pAVIStream->FindSample(lPos, lFlags);

            hrMethod = 0; // !!!

            pMessage->cbBuffer = sizeof(lResult) + sizeof(hrMethod);
        
            if ((hresult = pChannel->GetBuffer(pMessage, IID_IAVIStream)) != NOERROR)
                return PropagateResult(hresult, RPC_E_SERVER_CANTUNMARSHAL_DATA);

            ((HRESULT FAR *)pMessage->Buffer)[0] = hrMethod;
            ((DWORD FAR *)pMessage->Buffer)[1] = lResult;

            return NOERROR;
        }

        case IAVISTREAM_ReadFormat:
            // format on input: lPos, cbFormat
            // format on output: hresult, cbFormat, format
        {

            LONG cbIn;
            LONG cb;
            DWORD lPos;
            LPVOID lp;

            lPos = ((DWORD FAR *)pMessage->Buffer)[0];
            cb = cbIn = ((DWORD FAR *)pMessage->Buffer)[1];
        
            DPF("!ReadFormat (%ld)\n", lPos);
        
            pMessage->cbBuffer = sizeof(cbIn) + cbIn + sizeof(hrMethod);
        
            if ((hresult = pChannel->GetBuffer(pMessage, IID_IAVIStream)) != NOERROR)
                return PropagateResult(hresult, RPC_E_SERVER_CANTUNMARSHAL_DATA);

            lp = cbIn ? (LPBYTE) pMessage->Buffer + 2 * sizeof(DWORD) : NULL;
        
            hrMethod = m_pAVIStream->ReadFormat(lPos, lp, &cb);

            ((HRESULT FAR *)pMessage->Buffer)[0] = hrMethod;
            ((DWORD FAR *)pMessage->Buffer)[1] = cb;
            pMessage->cbBuffer = (ULONG)(sizeof(cbIn) + sizeof(hrMethod) +
                                 ((cb && cbIn) ? cb : 0));

            return NOERROR;
        }

        case IAVISTREAM_Read:
            // format on input: lPos, lSamples, cb
            // format on output: hresult, samples, cb, frame
        {

            LONG cb;
            LONG lPos, lSamples;
            LPVOID lp;


            lPos = ((DWORD FAR *)pMessage->Buffer)[0];
            lSamples = ((DWORD FAR *)pMessage->Buffer)[1];
            cb = ((DWORD FAR *)pMessage->Buffer)[2];
        
            DPF("!Read (%ld, %ld) ", lPos, lSamples);

            pMessage->cbBuffer = 3 * sizeof(DWORD) + cb;
        
            if ((hresult = pChannel->GetBuffer(pMessage, IID_IAVIStream)) != NOERROR)
                return PropagateResult(hresult, RPC_E_SERVER_CANTUNMARSHAL_DATA);

            lp = cb ? (LPBYTE) pMessage->Buffer + 3 * sizeof(DWORD) : NULL;

            DPF("! %ld bytes ", cb);

            hrMethod = m_pAVIStream->Read(lPos, lSamples, lp, cb, &cb, &lSamples);

            DPF("! -> %ld bytes\n", cb);

            ((HRESULT FAR *)pMessage->Buffer)[0] = hrMethod;
            ((DWORD FAR *)pMessage->Buffer)[1] = cb;
            ((DWORD FAR *)pMessage->Buffer)[2] = lSamples;

            return NOERROR;
        }

        default:
            // unknown method
        
            DPF("!Unknown method (%d)\n", pMessage->iMethod);

            return ResultFromScode(RPC_E_UNEXPECTED);
    }
}


// return TRUE if we support given interface
STDMETHODIMP_(IRpcStubBuffer FAR *) CStubAVIStream::IsIIDSupported(REFIID iid)
{
    // if we are connected, we have already checked for this interface;
    // if we are not connected, it doesn't matter.
    return iid == IID_IAVIStream ? (IRpcStubBuffer *) this : 0;
}


// returns number of refs we have to object
STDMETHODIMP_(ULONG) CStubAVIStream::CountRefs(void)
{
    // return 1 if connected; 0 if not.
    return m_pAVIStream != NULL;
}

STDMETHODIMP CStubAVIStream::DebugServerQueryInterface(LPVOID FAR *ppv)
{
    *ppv = m_pAVIStream;

    if (!m_pAVIStream) {
        DPF("!No stream!\n");
        return ResultFromScode(E_UNEXPECTED);
    }

    return NOERROR;
}

STDMETHODIMP_(void) CStubAVIStream::DebugServerRelease(LPVOID pv)
{


}




/*
 *  IMPLEMENTATION of CPrxAVIFile
 *
 */


// create unconnected CPrxAVIFile; return controlling IProxy/IUnknokwn FAR*
IRpcProxyBuffer FAR* CPrxAVIFile::Create(IUnknown FAR* pUnkOuter)
{
    CPrxAVIFile FAR* pPrxAVIFile;

    if ((pPrxAVIFile = new CPrxAVIFile(pUnkOuter)) == NULL)
                return NULL;

    return &pPrxAVIFile->m_Proxy;
}


CPrxAVIFile::CPrxAVIFile(IUnknown FAR* pUnkOuter) : m_Proxy(this)
{
    // NOTE: could assert here since we should always be aggregated
    if (pUnkOuter == NULL)
        pUnkOuter = &m_Proxy;

    m_refs = 1;
    m_pUnkOuter = pUnkOuter;
    m_pRpcChannelBuffer = NULL;
    m_fi.dwStreams = 0;
}


CPrxAVIFile::~CPrxAVIFile(void)
{
    m_Proxy.Disconnect();
}


// Methods for controlling unknown
STDMETHODIMP CPrxAVIFile::CProxyImpl::QueryInterface(REFIID iid, LPVOID FAR* ppv)
{
    if (iid == IID_IUnknown || iid == IID_IRpcProxyBuffer)
        *ppv = (void FAR *)this;
    else if (iid ==  IID_IAVIFile)
        *ppv = (void FAR *)m_pPrxAVIFile;
    else
    {
        *ppv = NULL;
        return ResultFromScode(E_NOINTERFACE);
    }

    // simplest way to be correct: always addref the pointer we will return;
    // easy since all interfaces here are derived from IUnknown.
    ((IUnknown FAR*) *ppv)->AddRef();
    return NOERROR;
}

STDMETHODIMP_(ULONG) CPrxAVIFile::CProxyImpl::AddRef(void)
{
    return ++m_pPrxAVIFile->m_refs;
}

STDMETHODIMP_(ULONG) CPrxAVIFile::CProxyImpl::Release(void)
{
    if (--m_pPrxAVIFile->m_refs == 0)
    {
        delete m_pPrxAVIFile;
        return 0;
    }
    return m_pPrxAVIFile->m_refs;
}


// connect proxy to channel given
STDMETHODIMP CPrxAVIFile::CProxyImpl::Connect(IRpcChannelBuffer FAR* pChannelChannelBuffer)
{
    if (m_pPrxAVIFile->m_pRpcChannelBuffer != NULL)
        return ResultFromScode(E_UNEXPECTED);

    if (pChannelChannelBuffer == NULL)
        return ResultFromScode(E_INVALIDARG);

    (m_pPrxAVIFile->m_pRpcChannelBuffer = pChannelChannelBuffer)->AddRef();
    return NOERROR;
}


// disconnect proxy from any current channel
STDMETHODIMP_(void) CPrxAVIFile::CProxyImpl::Disconnect(void)
{
    if (m_pPrxAVIFile->m_pRpcChannelBuffer)
    {
        m_pPrxAVIFile->m_pRpcChannelBuffer->Release();
        m_pPrxAVIFile->m_pRpcChannelBuffer = NULL;
    }
}



// IUnknown methods for external interface(s); always delegate
STDMETHODIMP CPrxAVIFile::QueryInterface(REFIID iid, LPVOID FAR* ppv)
{
    return m_pUnkOuter->QueryInterface(iid, ppv);
}

STDMETHODIMP_(ULONG) CPrxAVIFile::AddRef(void)
{
    return m_pUnkOuter->AddRef();
}

STDMETHODIMP_(ULONG) CPrxAVIFile::Release(void)
{
    return m_pUnkOuter->Release();
}



// IAVIFile interface methods

#ifdef _WIN32
STDMETHODIMP CPrxAVIFile::Info(AVIFILEINFOW FAR * psi, LONG lSize)
#else
STDMETHODIMP CPrxAVIFile::Info(AVIFILEINFO FAR * psi, LONG lSize)
#endif
{
    HRESULT hrMarshal;
    HRESULT hrMethod = NOERROR;
    IRpcChannelBuffer FAR* pChannel = m_pRpcChannelBuffer;

    if (pChannel == NULL)
        return ResultFromScode(RPC_E_CONNECTION_TERMINATED);

    if (m_fi.dwStreams == 0) {
        RPCOLEMESSAGE Message;

        _fmemset(&Message, 0, sizeof(Message));

        // format in: lSize
        // format out: hrMethod, PS_FILEINFO
        Message.cbBuffer = sizeof(lSize);
        Message.iMethod = IAVIFILE_Info;
        
        if ((hrMarshal = pChannel->GetBuffer(&Message, IID_IAVIFile)) != NOERROR)
            goto ErrExit;

        ((DWORD FAR *)Message.Buffer)[0] = sizeof(PS_FILEINFO);
        
        if ((hrMarshal = pChannel->SendReceive(&Message, (ULONG*) &hrMethod)) != NOERROR) {
            ;
ErrExit:
            return PropagateResult(hrMarshal, RPC_E_CLIENT_CANTMARSHAL_DATA);
        }

        hrMethod = ((HRESULT FAR *)Message.Buffer)[0];

        PS_FILEINFO FAR * psinfo = (PS_FILEINFO FAR *)
                        ((LPBYTE)Message.Buffer + sizeof(HRESULT));

        // get the bits we want
        m_fi.dwMaxBytesPerSec   = psinfo->dwMaxBytesPerSec;     // max. transfer rate
        m_fi.dwFlags    = psinfo->dwFlags;              // the ever-present flags
        m_fi.dwCaps     = psinfo->dwCaps;
        m_fi.dwStreams  = psinfo->dwStreams;
        m_fi.dwSuggestedBufferSize = psinfo->dwSuggestedBufferSize;
        m_fi.dwWidth    = psinfo->dwWidth;
        m_fi.dwHeight   = psinfo->dwHeight;
        m_fi.dwScale    = psinfo->dwScale;      
        m_fi.dwRate     = psinfo->dwRate;       /* dwRate / dwScale == samples/second */
        m_fi.dwLength   = psinfo->dwLength;
        m_fi.dwEditCount = psinfo->dwEditCount;


#ifdef _WIN32   
        // use unicode if we've been sent it
        if (psinfo->bHasUnicode) {
            _fmemcpy(m_fi.szFileType,
                psinfo->szUnicodeType, sizeof(m_fi.szFileType));
        } else {
            // need ansi->unicode thunk
            MultiByteToWideChar(
                CP_ACP, 0,
                psinfo->szFileType,
                -1,
                m_fi.szFileType,
                NUMELMS(m_fi.szFileType));
        }
#else
        // we only use the ansi which is always sent
        _fmemcpy(m_fi.szFileType, psinfo->szFileType, sizeof(m_fi.szFileType));
#endif

        pChannel->FreeBuffer(&Message);
    }

    _fmemcpy(psi, &m_fi, min((int) lSize, sizeof(m_fi)));

    return hrMethod;

}

#ifndef _WIN32
STDMETHODIMP CPrxAVIFile::Open(LPCTSTR szFile, UINT mode)
{
    return ResultFromScode(E_NOTIMPL);
}
#endif

STDMETHODIMP CPrxAVIFile::GetStream(PAVISTREAM FAR * ppStream,
                                     DWORD fccType,
                                     LONG lParam)
{
    HRESULT hrMarshal;
    HRESULT hrMethod = NOERROR;
    IRpcChannelBuffer FAR* pChannel = m_pRpcChannelBuffer;

    if (pChannel == NULL)
        return ResultFromScode(RPC_E_CONNECTION_TERMINATED);

    RPCOLEMESSAGE Message;

    _fmemset(&Message, 0, sizeof(Message));

    // format in: fccType lParam
    // format out: returned interface (marshalled)
    Message.cbBuffer = sizeof(fccType) + sizeof(lParam);
    Message.iMethod = IAVIFILE_GetStream;

    if ((hrMarshal = pChannel->GetBuffer(&Message, IID_IAVIFile)) != NOERROR)
        goto ErrExit;

    ((DWORD FAR *)Message.Buffer)[0] = fccType;
    ((DWORD FAR *)Message.Buffer)[1] = lParam;

    if ((hrMarshal = pChannel->SendReceive(&Message, (ULONG*) &hrMethod)) != NOERROR) {
        ;
ErrExit:
        return PropagateResult(hrMarshal, RPC_E_CLIENT_CANTMARSHAL_DATA);
    }

    hrMethod = ((HRESULT FAR *)Message.Buffer)[0];

    if (hrMethod == NOERROR) {
        HGLOBAL     h;
        LPSTREAM    pstm;

        h = GlobalAlloc(GHND, Message.cbBuffer - sizeof(hrMethod));

        hmemcpy(GlobalLock(h),
                (LPBYTE) Message.Buffer + sizeof(hrMethod),
                Message.cbBuffer - sizeof(hrMethod));

        CreateStreamOnHGlobal(h, FALSE, &pstm);
        
        CoUnmarshalInterface(pstm, IID_IAVIStream, (LPVOID FAR *) ppStream);

        pstm->Release();

        pChannel->FreeBuffer(&Message);
    }

    return hrMethod;
}

STDMETHODIMP CPrxAVIFile::CreateStream(
                                     PAVISTREAM FAR * ppStream,
#ifdef _WIN32
                                     AVISTREAMINFOW FAR * psi)
#else
                                     AVISTREAMINFO FAR * psi)
#endif
{
    return ResultFromScode(E_NOTIMPL);
}

#ifndef _WIN32
STDMETHODIMP CPrxAVIFile::Save(
                                     LPCTSTR szFile,
                                     AVICOMPRESSOPTIONS FAR *lpOptions,
                                     AVISAVECALLBACK lpfnCallback)
{

    return ResultFromScode(E_NOTIMPL);
}
#endif


STDMETHODIMP CPrxAVIFile::ReadData(DWORD ckid, LPVOID lp, LONG FAR *lpcb)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIFile::WriteData(DWORD ckid, LPVOID lp, LONG cb)
{
    return ResultFromScode(E_NOTIMPL);
}

STDMETHODIMP CPrxAVIFile::EndRecord()
{
    return ResultFromScode(E_NOTIMPL);
}

#ifdef _WIN32
STDMETHODIMP CPrxAVIFile::DeleteStream(DWORD fccType, LONG lParam)
{
    return ResultFromScode(AVIERR_UNSUPPORTED);
}
#else
STDMETHODIMP CPrxAVIFile::Reserved1(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIFile::Reserved2(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIFile::Reserved3(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIFile::Reserved4(void)
{
    return ResultFromScode(E_NOTIMPL);
}


STDMETHODIMP CPrxAVIFile::Reserved5(void)
{
    return ResultFromScode(E_NOTIMPL);
}

#endif


/*
 *  IMPLEMENTATION of CStubAVIFile
 *      
 */

// create connected interface stub
HRESULT CStubAVIFile::Create(IUnknown FAR* pUnkObject, IRpcStubBuffer FAR* FAR* ppStub)
{
        CStubAVIFile FAR* pStubAVIFile;

        *ppStub = NULL;

    if ((pStubAVIFile = new CStubAVIFile()) == NULL)
                return ResultFromScode(E_OUTOFMEMORY);

        HRESULT hresult;
        if ((hresult = pStubAVIFile->Connect(pUnkObject)) != NOERROR)
        {
                pStubAVIFile->Release();
                return hresult;
        }

        *ppStub = pStubAVIFile;
        return NOERROR;
}


CStubAVIFile::CStubAVIFile(void)
{
    m_refs = 1;
    m_pAVIFile = NULL;
    RegisterStubUsage();
}


CStubAVIFile::~CStubAVIFile(void)
{
    UnregisterStubUsage();
    Disconnect();
}


// controling unknown methods for interface stub
STDMETHODIMP CStubAVIFile::QueryInterface(REFIID iid, LPVOID FAR* ppv)
{

    if (iid == IID_IUnknown || iid == IID_IRpcStubBuffer)
    {
        *ppv = this;
        ++m_refs;
        return NOERROR;
    }
    else
    {
        *ppv = NULL;
        return ResultFromScode(E_NOINTERFACE);
    }
}

STDMETHODIMP_(ULONG) CStubAVIFile::AddRef(void)
{
        return ++m_refs;
}

STDMETHODIMP_(ULONG) CStubAVIFile::Release(void)
{
        if (--m_refs == 0)
        {
                delete this;
                return 0;
        }

        return m_refs;
}


// connect interface stub to server object
STDMETHODIMP CStubAVIFile::Connect(IUnknown FAR* pUnkObj)
{
        if (m_pAVIFile)
                // call Disconnect first
                return ResultFromScode(E_UNEXPECTED);

        if (pUnkObj == NULL)
                return ResultFromScode(E_INVALIDARG);
                
        // NOTE: QI ensures out param is zero if error
        return pUnkObj->QueryInterface(IID_IAVIFile, (LPVOID FAR*)&m_pAVIFile);
}


// disconnect interface stub from server objec
STDMETHODIMP_(void) CStubAVIFile::Disconnect(void)
{
        if (m_pAVIFile) {
                m_pAVIFile->Release();
                m_pAVIFile = NULL;
        }
}


// remove method call
STDMETHODIMP CStubAVIFile::Invoke
        (RPCOLEMESSAGE FAR *pMessage, IRpcChannelBuffer FAR *pChannel)
{
    HRESULT     hresult;
    HRESULT             hrMethod;
        
    if (!m_pAVIFile)
        return ResultFromScode(RPC_E_UNEXPECTED);

#if 0
    if (iid != IID_IAVIFile)
        return ResultFromScode(RPC_E_UNEXPECTED);
#endif

    switch (pMessage->iMethod)
    {
        case IAVIFILE_Info:
            // format on input: lSize
            // format on output: hresult, AVIFILEINFO
        {
            DWORD lSize;
#ifdef _WIN32
            AVIFILEINFOW si;
#else
            AVIFILEINFO si;
#endif
            PS_FILEINFO psinfo;
            hrMethod = m_pAVIFile->Info(&si, sizeof(si));

            // copy all members
            psinfo.dwMaxBytesPerSec     = si.dwMaxBytesPerSec;
            psinfo.dwFlags      = si.dwFlags;
            psinfo.dwCaps       = si.dwCaps;
            psinfo.dwStreams    = si.dwStreams;
            psinfo.dwSuggestedBufferSize        = si.dwSuggestedBufferSize;
            psinfo.dwWidth      = si.dwWidth;
            psinfo.dwHeight     = si.dwHeight;
            psinfo.dwScale      = si.dwScale;   
            psinfo.dwRate       = si.dwRate;
            psinfo.dwLength     = si.dwLength;
            psinfo.dwEditCount  = si.dwEditCount;

#ifdef _WIN32   
            // send both UNICODE and ansi
            hmemcpy(psinfo.szUnicodeType, si.szFileType, NUMELMS(psinfo.szFileType));
            psinfo.bHasUnicode = TRUE;
            WideCharToMultiByte(CP_ACP, 0,
                si.szFileType,
                -1,
                psinfo.szFileType,
                NUMELMS(psinfo.szFileType),
                NULL, NULL);
#else
            // just send ansi version for 16-bit stub
            psinfo.bHasUnicode = FALSE;
            hmemcpy(psinfo.szFileType, si.szFileType, sizeof(si.szFileType));
#endif

            lSize = ((DWORD FAR *)pMessage->Buffer)[0];

            pMessage->cbBuffer = lSize + sizeof(hrMethod);
        
            if ((hresult = pChannel->GetBuffer(pMessage, IID_IAVIStream)) != NOERROR)
                return PropagateResult(hresult, RPC_E_SERVER_CANTUNMARSHAL_DATA);

            ((HRESULT FAR *)pMessage->Buffer)[0] = hrMethod;

            hmemcpy((LPBYTE) pMessage->Buffer + sizeof(hrMethod),
                    &psinfo,
                    lSize);


            return NOERROR;
        }

        case IAVIFILE_GetStream:
            // format on input: fccType, lParam
            // format on output: marshalled IAVIStream pointer
        {
            DWORD           lParam, fccType;
            PAVISTREAM      ps;
            HGLOBAL         h;
            DWORD           dwDestCtx = 0;
            LPVOID          pvDestCtx = NULL;
            DWORD           cb;
            LPSTREAM        pstm;
        
            fccType = ((DWORD FAR *)pMessage->Buffer)[0];
            lParam = ((DWORD FAR *)pMessage->Buffer)[1];
        
            hrMethod = m_pAVIFile->GetStream(&ps, fccType, lParam);

            if (hrMethod == NOERROR) {

                pChannel->GetDestCtx(&dwDestCtx, &pvDestCtx);

#ifdef _WIN32
                cb = 0;
                CoGetMarshalSizeMax(&cb, IID_IAVIStream, ps,
                                    dwDestCtx, pvDestCtx, MSHLFLAGS_NORMAL);
#else
                cb = 800; // !!!!!!!
#endif

                h = GlobalAlloc(GHND, cb);

                CreateStreamOnHGlobal(h, FALSE, &pstm);

                CoMarshalInterface(pstm, IID_IAVIStream, ps,
                                   dwDestCtx, pvDestCtx, MSHLFLAGS_NORMAL);

                pstm->Release();
            } else
                cb = 0;

            pMessage->cbBuffer = cb + sizeof(hrMethod);
        
            if ((hresult = pChannel->GetBuffer(pMessage, IID_IAVIStream)) != NOERROR)
                return PropagateResult(hresult, RPC_E_SERVER_CANTUNMARSHAL_DATA);

            ((HRESULT FAR *)pMessage->Buffer)[0] = hrMethod;

            if (cb) {
                hmemcpy((LPBYTE) pMessage->Buffer + sizeof(hrMethod),
                        GlobalLock(h), cb);
                GlobalUnlock(h);
                GlobalFree(h);
            }

            return NOERROR;

        }


        default:
                // unknown method
                return ResultFromScode(RPC_E_UNEXPECTED);
        }
}


// return TRUE if we support given interface
STDMETHODIMP_(IRpcStubBuffer FAR *) CStubAVIFile::IsIIDSupported(REFIID iid)
{
        // if we are connected, we have already checked for this interface;
        // if we are not connected, it doesn't matter.
        return iid == IID_IAVIFile ? (IRpcStubBuffer *) this : 0;
}


// returns number of refs we have to object
STDMETHODIMP_(ULONG) CStubAVIFile::CountRefs(void)
{
        // return 1 if connected; 0 if not.
        return m_pAVIFile != NULL;
}



STDMETHODIMP CStubAVIFile::DebugServerQueryInterface(LPVOID FAR *ppv)
{
    *ppv = m_pAVIFile;

    if (!m_pAVIFile) {
        DPF("!No File!\n");
        return ResultFromScode(E_UNEXPECTED);
    }

    return NOERROR;
}

STDMETHODIMP_(void) CStubAVIFile::DebugServerRelease(LPVOID pv)
{


}



//
// The following functions exist to allow an application to determine
// if another application is using any of its objects.
//
// !!!!!!   I don't know if this really works.
//

#define MAXTASKCACHE    64
HTASK   ahtaskUsed[MAXTASKCACHE];
int     aiRefCount[MAXTASKCACHE];

void RegisterStubUsage(void)
{
    HTASK htask = GetCurrentTask();
    int i;

    for (i = 0; i < MAXTASKCACHE; i++) {
        if (ahtaskUsed[i] == htask) {
            ++aiRefCount[i];
            return;
        }
    }

    for (i = 0; i < MAXTASKCACHE; i++) {
        if (ahtaskUsed[i] == NULL) {
            ahtaskUsed[i] = htask;
            aiRefCount[i] = 1;
            return;
        }
    }

    DPF("Ack: Proxy cache full!\n");
}

void UnregisterStubUsage(void)
{
    HTASK htask = GetCurrentTask();
    int i;

    for (i = 0; i < MAXTASKCACHE; i++) {
        if (ahtaskUsed[i] == htask) {
            if (--aiRefCount[i] <= 0) {
                ahtaskUsed[i] = NULL;
                aiRefCount[i] = 0;
            }
            return;
        }
    }

    DPF("Ack: Proxy not in cache!\n");
}

BOOL FAR TaskHasExistingProxies(void)
{
    HTASK htask = GetCurrentTask();
    int i;

    for (i = 0; i < MAXTASKCACHE; i++) {
        if (ahtaskUsed[i] == htask) {
            return TRUE;
        }
    }

    return FALSE;
}