Initial community commit

Src/Plugins/Input/in_dshow/base/dllentry.cpp

@@ -0,0 +1,373 @@
+//------------------------------------------------------------------------------
+// File: DlleEntry.cpp
+//
+// Desc: DirectShow base classes - implements classes used to support dll
+//       entry points for COM objects.
+//
+// Copyright (c) 1992-2001 Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------------------------
+
+
+#include <streams.h>
+#include <initguid.h>
+#include "combase.h"
+
+#ifdef DEBUG
+#ifdef UNICODE
+#ifndef _UNICODE
+#define _UNICODE
+#endif // _UNICODE
+#endif // UNICODE
+
+#include <tchar.h>
+#endif // DEBUG
+#include <strsafe.h>
+
+
+//extern int g_cTemplates;
+//extern CFactoryTemplate g_Templates[];
+
+HINSTANCE g_hInst;
+DWORD	  g_amPlatform;		// VER_PLATFORM_WIN32_WINDOWS etc... (from GetVersionEx)
+OSVERSIONINFO g_osInfo;
+
+//
+// an instance of this is created by the DLLGetClassObject entrypoint
+// it uses the CFactoryTemplate object it is given to support the
+// IClassFactory interface
+
+class CClassFactory : public IClassFactory, public CBaseObject
+{
+
+private:
+    const CFactoryTemplate *const m_pTemplate;
+
+    ULONG m_cRef;
+
+    static int m_cLocked;
+public:
+    CClassFactory(const CFactoryTemplate *);
+
+    // IUnknown
+    STDMETHODIMP QueryInterface(REFIID riid, __deref_out void ** ppv);
+    STDMETHODIMP_(ULONG)AddRef();
+    STDMETHODIMP_(ULONG)Release();
+
+    // IClassFactory
+    STDMETHODIMP CreateInstance(LPUNKNOWN pUnkOuter, REFIID riid, __deref_out void **pv);
+    STDMETHODIMP LockServer(BOOL fLock);
+
+    // allow DLLGetClassObject to know about global server lock status
+    static BOOL IsLocked() {
+        return (m_cLocked > 0);
+    };
+};
+
+// process-wide dll locked state
+int CClassFactory::m_cLocked = 0;
+
+CClassFactory::CClassFactory(const CFactoryTemplate *pTemplate)
+: CBaseObject(NAME("Class Factory"))
+, m_cRef(0)
+, m_pTemplate(pTemplate)
+{
+}
+
+
+STDMETHODIMP
+CClassFactory::QueryInterface(REFIID riid,__deref_out void **ppv)
+{
+    CheckPointer(ppv,E_POINTER)
+    ValidateReadWritePtr(ppv,sizeof(PVOID));
+    *ppv = NULL;
+
+    // any interface on this object is the object pointer.
+    if ((riid == IID_IUnknown) || (riid == IID_IClassFactory)) {
+        *ppv = (LPVOID) this;
+	// AddRef returned interface pointer
+        ((LPUNKNOWN) *ppv)->AddRef();
+        return NOERROR;
+    }
+
+    return ResultFromScode(E_NOINTERFACE);
+}
+
+
+STDMETHODIMP_(ULONG)
+CClassFactory::AddRef()
+{
+    return ++m_cRef;
+}
+
+STDMETHODIMP_(ULONG)
+CClassFactory::Release()
+{
+    LONG lRef = InterlockedDecrement((volatile LONG *)&m_cRef);
+    if (lRef == 0) {
+        delete this;
+        return 0;
+    } else {
+        return lRef;
+    }
+}
+
+STDMETHODIMP
+CClassFactory::CreateInstance(
+    LPUNKNOWN pUnkOuter,
+    REFIID riid,
+    __deref_out void **pv)
+{
+    CheckPointer(pv,E_POINTER)
+    ValidateReadWritePtr(pv,sizeof(void *));
+    *pv = NULL;
+
+    /* Enforce the normal OLE rules regarding interfaces and delegation */
+
+    if (pUnkOuter != NULL) {
+        if (IsEqualIID(riid,IID_IUnknown) == FALSE) {
+            *pv = NULL;
+            return ResultFromScode(E_NOINTERFACE);
+        }
+    }
+
+    /* Create the new object through the derived class's create function */
+
+    HRESULT hr = NOERROR;
+    CUnknown *pObj = m_pTemplate->CreateInstance(pUnkOuter, &hr);
+
+    if (pObj == NULL) {
+        *pv = NULL;
+	if (SUCCEEDED(hr)) {
+	    hr = E_OUTOFMEMORY;
+	}
+	return hr;
+    }
+
+    /* Delete the object if we got a construction error */
+
+    if (FAILED(hr)) {
+        delete pObj;
+        *pv = NULL;
+        return hr;
+    }
+
+    /* Get a reference counted interface on the object */
+
+    /* We wrap the non-delegating QI with NDAddRef & NDRelease. */
+    /* This protects any outer object from being prematurely    */
+    /* released by an inner object that may have to be created  */
+    /* in order to supply the requested interface.              */
+    pObj->NonDelegatingAddRef();
+    hr = pObj->NonDelegatingQueryInterface(riid, pv);
+    pObj->NonDelegatingRelease();
+    /* Note that if NonDelegatingQueryInterface fails, it will  */
+    /* not increment the ref count, so the NonDelegatingRelease */
+    /* will drop the ref back to zero and the object will "self-*/
+    /* destruct".  Hence we don't need additional tidy-up code  */
+    /* to cope with NonDelegatingQueryInterface failing.        */
+
+    if (SUCCEEDED(hr)) {
+        ASSERT(*pv);
+    }
+
+    return hr;
+}
+
+STDMETHODIMP
+CClassFactory::LockServer(BOOL fLock)
+{
+    if (fLock) {
+        m_cLocked++;
+    } else {
+        m_cLocked--;
+    }
+    return NOERROR;
+}
+
+
+// --- COM entrypoints -----------------------------------------
+
+//called by COM to get the class factory object for a given class
+/*
+__control_entrypoint(DllExport) STDAPI
+DllGetClassObject(
+    __in REFCLSID rClsID,
+    __in REFIID riid,
+    __deref_out void **pv)
+{
+    *pv = NULL;
+    if (!(riid == IID_IUnknown) && !(riid == IID_IClassFactory)) {
+            return E_NOINTERFACE;
+    }
+
+    // traverse the array of templates looking for one with this
+    // class id
+    for (int i = 0; i < g_cTemplates; i++) {
+        const CFactoryTemplate * pT = &g_Templates[i];
+        if (pT->IsClassID(rClsID)) {
+
+            // found a template - make a class factory based on this
+            // template
+
+            *pv = (LPVOID) (LPUNKNOWN) new CClassFactory(pT);
+            if (*pv == NULL) {
+                return E_OUTOFMEMORY;
+            }
+            ((LPUNKNOWN)*pv)->AddRef();
+            return NOERROR;
+        }
+    }
+    return CLASS_E_CLASSNOTAVAILABLE;
+}
+*/
+
+//
+//  Call any initialization routines
+//
+/*
+void
+DllInitClasses(BOOL bLoading)
+{
+    int i;
+
+    // traverse the array of templates calling the init routine
+    // if they have one
+    for (i = 0; i < g_cTemplates; i++) {
+        const CFactoryTemplate * pT = &g_Templates[i];
+        if (pT->m_lpfnInit != NULL) {
+            (*pT->m_lpfnInit)(bLoading, pT->m_ClsID);
+        }
+    }
+
+}
+*/
+
+// called by COM to determine if this dll can be unloaded
+// return ok unless there are outstanding objects or a lock requested
+// by IClassFactory::LockServer
+//
+// CClassFactory has a static function that can tell us about the locks,
+// and CCOMObject has a static function that can tell us about the active
+// object count
+STDAPI
+DllCanUnloadNow()
+{
+    DbgLog((LOG_MEMORY,2,TEXT("DLLCanUnloadNow called - IsLocked = %d, Active objects = %d"),
+        CClassFactory::IsLocked(),
+        CBaseObject::ObjectsActive()));
+
+    if (CClassFactory::IsLocked() || CBaseObject::ObjectsActive()) {
+	return S_FALSE;
+    } else {
+        return S_OK;
+    }
+}
+
+
+// --- standard WIN32 entrypoints --------------------------------------
+/*
+
+extern "C" void __cdecl __security_init_cookie(void);
+extern "C" BOOL WINAPI _DllEntryPoint(HINSTANCE, ULONG, __inout_opt LPVOID);
+#pragma comment(linker, "/merge:.CRT=.rdata")
+
+extern "C"
+DECLSPEC_NOINLINE
+BOOL 
+WINAPI
+DllEntryPoint(
+    HINSTANCE hInstance, 
+    ULONG ulReason, 
+    __inout_opt LPVOID pv
+    )
+{
+    if ( ulReason == DLL_PROCESS_ATTACH ) {
+        // Must happen before any other code is executed.  Thankfully - it's re-entrant
+        __security_init_cookie();
+    }
+    return _DllEntryPoint(hInstance, ulReason, pv);
+}
+
+
+DECLSPEC_NOINLINE
+BOOL 
+WINAPI
+_DllEntryPoint(
+    HINSTANCE hInstance, 
+    ULONG ulReason, 
+    __inout_opt LPVOID pv
+    )
+{
+#ifdef DEBUG
+    extern bool g_fDbgInDllEntryPoint;
+    g_fDbgInDllEntryPoint = true;
+#endif
+
+    switch (ulReason)
+    {
+
+    case DLL_PROCESS_ATTACH:
+        DisableThreadLibraryCalls(hInstance);
+        DbgInitialise(hInstance);
+
+    	{
+    	    // The platform identifier is used to work out whether
+    	    // full unicode support is available or not.  Hence the
+    	    // default will be the lowest common denominator - i.e. N/A
+                g_amPlatform = VER_PLATFORM_WIN32_WINDOWS; // win95 assumed in case GetVersionEx fails
+    
+                g_osInfo.dwOSVersionInfoSize = sizeof(g_osInfo);
+                if (GetVersionEx(&g_osInfo)) {
+            	g_amPlatform = g_osInfo.dwPlatformId;
+    	    } else {
+    		DbgLog((LOG_ERROR, 1, TEXT("Failed to get the OS platform, assuming Win95")));
+    	    }
+    	}
+
+        g_hInst = hInstance;
+        DllInitClasses(TRUE);
+        break;
+
+    case DLL_PROCESS_DETACH:
+        DllInitClasses(FALSE);
+
+#ifdef DEBUG
+        if (CBaseObject::ObjectsActive()) {
+            DbgSetModuleLevel(LOG_MEMORY, 2);
+            TCHAR szInfo[512];
+            extern TCHAR m_ModuleName[];     // Cut down module name
+
+            TCHAR FullName[_MAX_PATH];      // Load the full path and module name
+            TCHAR *pName;                   // Searches from the end for a backslash
+
+            GetModuleFileName(NULL,FullName,_MAX_PATH);
+            pName = _tcsrchr(FullName,'\\');
+            if (pName == NULL) {
+                pName = FullName;
+            } else {
+                pName++;
+            }
+
+            (void)StringCchPrintf(szInfo, NUMELMS(szInfo), TEXT("Executable: %s  Pid %x  Tid %x. "),
+			    pName, GetCurrentProcessId(), GetCurrentThreadId());
+
+            (void)StringCchPrintf(szInfo+lstrlen(szInfo), NUMELMS(szInfo) - lstrlen(szInfo), TEXT("Module %s, %d objects left active!"),
+                     m_ModuleName, CBaseObject::ObjectsActive());
+            DbgAssert(szInfo, TEXT(__FILE__),__LINE__);
+
+	    // If running remotely wait for the Assert to be acknowledged
+	    // before dumping out the object register
+            DbgDumpObjectRegister();
+        }
+        DbgTerminate();
+#endif
+        break;
+    }
+
+#ifdef DEBUG
+    g_fDbgInDllEntryPoint = false;
+#endif
+    return TRUE;
+}
+
+*/