Initial XACT3 wrapper. Untested, unreferenced, unused

cpp/com_utils.h

@@ -78,6 +78,9 @@ extern const IID CLSID_AudioReverb_6;
 extern const IID CLSID_AudioReverb_7;
 extern const IID *CLSID_AudioReverb[];
 
+extern const IID IID_IXACT3Engine;
+extern const IID CLSID_XACTEngine;
+
 // quality of life macro's
 #define COM_METHOD(rtype)		virtual rtype __stdcall 
 

cpp/com_utils_xact.cpp

@@ -0,0 +1,155 @@
+#include "com_utils.h"
+#include <SDL.h>
+
+/* GUIDs */
+const IID IID_IUnknown = {0x00000000, 0x0000, 0x0000, {0xC0, 00, 00, 00, 00, 00, 00, 0x46}};
+const IID IID_IClassFactory = {0x00000001, 0x0000, 0x0000, {0xC0, 00, 00, 00, 00, 00, 00, 0x46}};
+
+const IID IID_IXACT3Engine = {0xb1ee676a, 0xd9cd, 0x4d2a, {0x89, 0xa8, 0xfa, 0x53, 0xeb, 0x9e, 0x48, 0x0b}};
+const IID CLSID_XACTEngine = {0xbcc782bc, 0x6492, 0x4c22, {0x8c, 0x35, 0xf5, 0xd7, 0x2f, 0xe7, 0x3c, 0x6e}};
+
+bool guid_equals(REFIID a, REFIID b)
+{
+	return SDL_memcmp(&a, &b, sizeof(IID)) == 0;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//
+// Class Factory: fun COM stuff
+//
+
+typedef void *(*FACTORY_FUNC)(void);
+void *CreateXACT3EngineInternal(void);
+
+template <REFIID fact_iid, FACTORY_FUNC fact_creator> class ClassFactory : public IClassFactory
+{
+public:
+	COM_METHOD(HRESULT) QueryInterface(REFIID riid, void **ppvInterface)
+	{
+		if (guid_equals(riid, IID_IUnknown) || guid_equals(riid, IID_IClassFactory))
+		{
+			*ppvInterface = static_cast<IClassFactory *>(this);
+		}
+		else
+		{
+			*ppvInterface = NULL;
+			return E_NOINTERFACE;
+		}
+
+		reinterpret_cast<IUnknown *>(*ppvInterface)->AddRef();
+
+		return S_OK;
+	}
+
+	COM_METHOD(ULONG) AddRef()
+	{
+		// FIXME: atomics
+		return ++refcount;
+	}
+
+	COM_METHOD(ULONG) Release()
+	{
+		// FIXME: atomics
+		long rc = --refcount;
+
+		if (rc == 0)
+		{
+			delete this;
+		}
+
+		return rc;
+	}
+
+	COM_METHOD(HRESULT) CreateInstance(IUnknown *pUnkOuter, REFIID riid, void **ppvObject)
+	{
+		if (pUnkOuter != NULL)
+		{
+			return CLASS_E_NOAGGREGATION;
+		}
+
+		void *obj = NULL;
+
+		if (guid_equals(riid, fact_iid))
+		{
+			obj = fact_creator();
+		}
+		else
+		{
+			*ppvObject = NULL;
+			return E_NOINTERFACE;
+		}
+
+		if (obj == NULL)
+		{
+			return E_OUTOFMEMORY;
+		}
+
+		return reinterpret_cast<IUnknown *>(obj)->QueryInterface(riid, ppvObject);
+	}
+
+	COM_METHOD(HRESULT) LockServer(BOOL fLock) { return E_NOTIMPL; }
+
+private:
+	long refcount;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+//
+// COM DLL interface functions
+//
+
+static void *DllHandle = NULL;
+
+BOOL __stdcall DllMain(void *hinstDLL, DWORD dwReason, LPVOID lpvReserved)
+{
+	if (dwReason == 1 /*DLL_PROCESS_ATTACH*/)
+	{
+		DllHandle = hinstDLL;
+	}
+	return 1;
+}
+
+extern "C" HRESULT __stdcall DllCanUnloadNow() 
+{ 
+	return S_FALSE; 
+}
+
+extern "C" HRESULT __stdcall DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv)
+{
+	IClassFactory *factory = NULL;
+
+	if (guid_equals(rclsid, CLSID_XACTEngine))
+	{
+		factory = new ClassFactory<IID_IXACT3Engine, CreateXACT3EngineInternal>();
+	}
+	else
+	{
+		return CLASS_E_CLASSNOTAVAILABLE;
+	}
+
+	if (!factory)
+	{
+		return E_OUTOFMEMORY;
+	}
+
+	return factory->QueryInterface(riid, ppv);
+}
+
+extern "C" HRESULT register_faudio_dll(void *, REFIID);
+extern "C" HRESULT unregister_faudio_dll(void *, REFIID);
+
+extern "C" HRESULT __stdcall DllRegisterServer(void)
+{
+#ifndef __WINE__
+	register_faudio_dll(DllHandle, CLSID_XACTEngine);
+#endif
+	return S_OK;
+}
+
+extern "C" HRESULT __stdcall DllUnregisterServer(void)
+{
+#ifndef __WINE__
+	unregister_faudio_dll(DllHandle, CLSID_XACTEngine);
+#endif
+	return S_OK;
+}