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windows-nt/Source/XPSP1/NT/multimedia/media/avi/avifile.16/avifps.cpp

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// avifps.cpp - proxy and stub code for IAVIFile & IAVIStream
//
//
// Copyright (c) 1993 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 "avifile.h"
#include "avifps.h"
#include "debug.h"
#ifndef WIN32
typedef POINT POINTS;
#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
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;
DPF("PrxStream %lx: Usage++=%lx\n", (DWORD) (LPVOID) this, 1L);
}
CPrxAVIStream::~CPrxAVIStream(void)
{
m_Proxy.Disconnect();
}
// 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 %lx: Usage++=%lx\n", (DWORD) (LPVOID) this, m_refs + 1);
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CPrxAVIStream::Release(void)
{
DPF("PrxStream %lx: Usage--=%lx\n", (DWORD) (LPVOID) this, m_refs - 1);
return m_pUnkOuter->Release();
}
// IAVIStream interface methods
STDMETHODIMP CPrxAVIStream::Create(LONG lParam1, LONG 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)
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)
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 %lx: Usage++=%lx (C)\n", (DWORD) (LPVOID) this, 1L);
m_pAVIStream = NULL;
RegisterStubUsage();
}
CStubAVIStream::~CStubAVIStream(void)
{
UnregisterStubUsage();
Disconnect();
}
// 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 %lx: Usage++=%lx (QI)\n", (DWORD) (LPVOID) this, m_refs + 1);
++m_refs;
return NOERROR;
}
else
{
*ppv = NULL;
return ResultFromScode(E_NOINTERFACE);
}
}
STDMETHODIMP_(ULONG) CStubAVIStream::AddRef(void)
{
DPF("StubStream %lx: Usage++=%lx\n", (DWORD) (LPVOID) this, m_refs + 1);
return ++m_refs;
}
STDMETHODIMP_(ULONG) CStubAVIStream::Release(void)
{
DPF("StubStream %lx: Usage--=%lx\n", (DWORD) (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 = %lx\n", (DWORD) (LPVOID) hr, (DWORD) 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 = 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 ");
hrMethod = m_pAVIStream->Read(lPos, lSamples, lp, cb, &cb, &lSamples);
DPF("! -> %ld bytes\n");
((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);
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;
}

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