Replace the ICOM_THIS_From macros by inline functions.

dlls/devenum/mediacatenum.c

@@ -29,9 +29,6 @@
 
 #include "wine/debug.h"
 
-
-/* #define ICOM_THIS_From_IROTData(class, name) class* This = (class*)(((char*)name)-sizeof(void*)) */
-
 WINE_DEFAULT_DEBUG_CHANNEL(devenum);
 
 static ULONG WINAPI DEVENUM_IEnumMoniker_AddRef(LPENUMMONIKER iface);

dlls/oleaut32/olepicture.c

@@ -125,10 +125,10 @@ typedef struct OLEPictureImpl {
    * IPicture handles IUnknown
    */
 
-    const IPictureVtbl       *lpvtbl1;
-    const IDispatchVtbl      *lpvtbl2;
-    const IPersistStreamVtbl *lpvtbl3;
-    const IConnectionPointContainerVtbl *lpvtbl4;
+    const IPictureVtbl       *lpVtbl;
+    const IDispatchVtbl      *lpvtblIDispatch;
+    const IPersistStreamVtbl *lpvtblIPersistStream;
+    const IConnectionPointContainerVtbl *lpvtblIConnectionPointContainer;
 
   /* Object reference count */
     LONG ref;
@@ -168,12 +168,21 @@ typedef struct OLEPictureImpl {
 /*
  * Macros to retrieve pointer to IUnknown (IPicture) from the other VTables.
  */
-#define ICOM_THIS_From_IDispatch(impl, name) \
-    impl *This = (impl*)(((char*)name)-sizeof(void*));
-#define ICOM_THIS_From_IPersistStream(impl, name) \
-    impl *This = (impl*)(((char*)name)-2*sizeof(void*));
-#define ICOM_THIS_From_IConnectionPointContainer(impl, name) \
-    impl *This = (impl*)(((char*)name)-3*sizeof(void*));
+
+static inline OLEPictureImpl *impl_from_IDispatch( IDispatch *iface )
+{
+    return (OLEPictureImpl *)((char*)iface - FIELD_OFFSET(OLEPictureImpl, lpvtblIDispatch));
+}
+
+static inline OLEPictureImpl *impl_from_IPersistStream( IPersistStream *iface )
+{
+    return (OLEPictureImpl *)((char*)iface - FIELD_OFFSET(OLEPictureImpl, lpvtblIPersistStream));
+}
+
+static inline OLEPictureImpl *impl_from_IConnectionPointContainer( IConnectionPointContainer *iface )
+{
+    return (OLEPictureImpl *)((char*)iface - FIELD_OFFSET(OLEPictureImpl, lpvtblIConnectionPointContainer));
+}
 
 /*
  * Predeclare VTables.  They get initialized at the end.
@@ -265,10 +274,10 @@ static OLEPictureImpl* OLEPictureImpl_Construct(LPPICTDESC pictDesc, BOOL fOwn)
   /*
    * Initialize the virtual function table.
    */
-  newObject->lpvtbl1 = &OLEPictureImpl_VTable;
-  newObject->lpvtbl2 = &OLEPictureImpl_IDispatch_VTable;
-  newObject->lpvtbl3 = &OLEPictureImpl_IPersistStream_VTable;
-  newObject->lpvtbl4 = &OLEPictureImpl_IConnectionPointContainer_VTable;
+  newObject->lpVtbl = &OLEPictureImpl_VTable;
+  newObject->lpvtblIDispatch = &OLEPictureImpl_IDispatch_VTable;
+  newObject->lpvtblIPersistStream = &OLEPictureImpl_IPersistStream_VTable;
+  newObject->lpvtblIConnectionPointContainer = &OLEPictureImpl_IConnectionPointContainer_VTable;
 
   CreateConnectionPoint((IUnknown*)newObject,&IID_IPropertyNotifySink,&newObject->pCP);
 
@@ -407,19 +416,19 @@ static HRESULT WINAPI OLEPictureImpl_QueryInterface(
   }
   else if (memcmp(&IID_IDispatch, riid, sizeof(IID_IDispatch)) == 0)
   {
-    *ppvObject = (IDispatch*)&(This->lpvtbl2);
+    *ppvObject = (IDispatch*)&(This->lpvtblIDispatch);
   }
   else if (memcmp(&IID_IPictureDisp, riid, sizeof(IID_IPictureDisp)) == 0)
   {
-    *ppvObject = (IDispatch*)&(This->lpvtbl2);
+    *ppvObject = (IDispatch*)&(This->lpvtblIDispatch);
   }
   else if (memcmp(&IID_IPersistStream, riid, sizeof(IID_IPersistStream)) == 0)
   {
-  *ppvObject = (IPersistStream*)&(This->lpvtbl3);
+  *ppvObject = (IPersistStream*)&(This->lpvtblIPersistStream);
   }
   else if (memcmp(&IID_IConnectionPointContainer, riid, sizeof(IID_IConnectionPointContainer)) == 0)
   {
-  *ppvObject = (IConnectionPointContainer*)&(This->lpvtbl4);
+  *ppvObject = (IConnectionPointContainer*)&(This->lpvtblIConnectionPointContainer);
   }
   /*
    * Check that we obtained an interface.
@@ -791,34 +800,34 @@ static HRESULT WINAPI OLEPictureImpl_get_Attributes(IPicture *iface,
 static HRESULT WINAPI OLEPictureImpl_IConnectionPointContainer_QueryInterface(
   IConnectionPointContainer* iface,
   REFIID riid,
-  VOID** ppvoid
-) {
-  ICOM_THIS_From_IConnectionPointContainer(IPicture,iface);
+  VOID** ppvoid)
+{
+  OLEPictureImpl *This = impl_from_IConnectionPointContainer(iface);
 
-  return IPicture_QueryInterface(This,riid,ppvoid);
+  return IPicture_QueryInterface((IPicture *)This,riid,ppvoid);
 }
 
 static ULONG WINAPI OLEPictureImpl_IConnectionPointContainer_AddRef(
   IConnectionPointContainer* iface)
 {
-  ICOM_THIS_From_IConnectionPointContainer(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IConnectionPointContainer(iface);
 
-  return IPicture_AddRef(This);
+  return IPicture_AddRef((IPicture *)This);
 }
 
 static ULONG WINAPI OLEPictureImpl_IConnectionPointContainer_Release(
   IConnectionPointContainer* iface)
 {
-  ICOM_THIS_From_IConnectionPointContainer(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IConnectionPointContainer(iface);
 
-  return IPicture_Release(This);
+  return IPicture_Release((IPicture *)This);
 }
 
 static HRESULT WINAPI OLEPictureImpl_EnumConnectionPoints(
   IConnectionPointContainer* iface,
-  IEnumConnectionPoints** ppEnum
-) {
-  ICOM_THIS_From_IConnectionPointContainer(IPicture, iface);
+  IEnumConnectionPoints** ppEnum)
+{
+  OLEPictureImpl *This = impl_from_IConnectionPointContainer(iface);
 
   FIXME("(%p,%p), stub!\n",This,ppEnum);
   return E_NOTIMPL;
@@ -827,9 +836,9 @@ static HRESULT WINAPI OLEPictureImpl_EnumConnectionPoints(
 static HRESULT WINAPI OLEPictureImpl_FindConnectionPoint(
   IConnectionPointContainer* iface,
   REFIID riid,
-  IConnectionPoint **ppCP
-) {
-  ICOM_THIS_From_IConnectionPointContainer(OLEPictureImpl, iface);
+  IConnectionPoint **ppCP)
+{
+  OLEPictureImpl *This = impl_from_IConnectionPointContainer(iface);
   TRACE("(%p,%s,%p)\n",This,debugstr_guid(riid),ppCP);
   if (!ppCP)
       return E_POINTER;
@@ -852,9 +861,9 @@ static HRESULT WINAPI OLEPictureImpl_IPersistStream_QueryInterface(
   REFIID     riid,
   VOID**     ppvoid)
 {
-  ICOM_THIS_From_IPersistStream(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
 
-  return IPicture_QueryInterface(This, riid, ppvoid);
+  return IPicture_QueryInterface((IPicture *)This, riid, ppvoid);
 }
 
 /************************************************************************
@@ -865,9 +874,9 @@ static HRESULT WINAPI OLEPictureImpl_IPersistStream_QueryInterface(
 static ULONG WINAPI OLEPictureImpl_IPersistStream_AddRef(
   IPersistStream* iface)
 {
-  ICOM_THIS_From_IPersistStream(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
 
-  return IPicture_AddRef(This);
+  return IPicture_AddRef((IPicture *)This);
 }
 
 /************************************************************************
@@ -878,9 +887,9 @@ static ULONG WINAPI OLEPictureImpl_IPersistStream_AddRef(
 static ULONG WINAPI OLEPictureImpl_IPersistStream_Release(
   IPersistStream* iface)
 {
-  ICOM_THIS_From_IPersistStream(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
 
-  return IPicture_Release(This);
+  return IPicture_Release((IPicture *)This);
 }
 
 /************************************************************************
@@ -889,7 +898,7 @@ static ULONG WINAPI OLEPictureImpl_IPersistStream_Release(
 static HRESULT WINAPI OLEPictureImpl_GetClassID(
   IPersistStream* iface,CLSID* pClassID)
 {
-  ICOM_THIS_From_IPersistStream(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
   FIXME("(%p),stub!\n",This);
   return E_FAIL;
 }
@@ -900,7 +909,7 @@ static HRESULT WINAPI OLEPictureImpl_GetClassID(
 static HRESULT WINAPI OLEPictureImpl_IsDirty(
   IPersistStream* iface)
 {
-  ICOM_THIS_From_IPersistStream(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
   FIXME("(%p),stub!\n",This);
   return E_NOTIMPL;
 }
@@ -1028,7 +1037,7 @@ static HRESULT WINAPI OLEPictureImpl_Load(IPersistStream* iface,IStream*pStm) {
   DWORD		header[2];
   WORD		magic;
   STATSTG       statstg;
-  ICOM_THIS_From_IPersistStream(OLEPictureImpl, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
   
   TRACE("(%p,%p)\n",This,pStm);
 
@@ -1519,7 +1528,7 @@ static HRESULT WINAPI OLEPictureImpl_Save(
     ULONG dummy;
     int iSerializeResult = 0;
 
-  ICOM_THIS_From_IPersistStream(OLEPictureImpl, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
 
     switch (This->desc.picType) {
     case PICTYPE_ICON:
@@ -1837,7 +1846,7 @@ static int serializeIcon(HICON hIcon, void ** ppBuffer, unsigned int * pLength)
 static HRESULT WINAPI OLEPictureImpl_GetSizeMax(
   IPersistStream* iface,ULARGE_INTEGER*pcbSize)
 {
-  ICOM_THIS_From_IPersistStream(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IPersistStream(iface);
   FIXME("(%p,%p),stub!\n",This,pcbSize);
   return E_NOTIMPL;
 }
@@ -1855,9 +1864,9 @@ static HRESULT WINAPI OLEPictureImpl_IDispatch_QueryInterface(
   REFIID     riid,
   VOID**     ppvoid)
 {
-  ICOM_THIS_From_IDispatch(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IDispatch(iface);
 
-  return IPicture_QueryInterface(This, riid, ppvoid);
+  return IPicture_QueryInterface((IPicture *)This, riid, ppvoid);
 }
 
 /************************************************************************
@@ -1868,9 +1877,9 @@ static HRESULT WINAPI OLEPictureImpl_IDispatch_QueryInterface(
 static ULONG WINAPI OLEPictureImpl_IDispatch_AddRef(
   IDispatch* iface)
 {
-  ICOM_THIS_From_IDispatch(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IDispatch(iface);
 
-  return IPicture_AddRef(This);
+  return IPicture_AddRef((IPicture *)This);
 }
 
 /************************************************************************
@@ -1881,9 +1890,9 @@ static ULONG WINAPI OLEPictureImpl_IDispatch_AddRef(
 static ULONG WINAPI OLEPictureImpl_IDispatch_Release(
   IDispatch* iface)
 {
-  ICOM_THIS_From_IDispatch(IPicture, iface);
+  OLEPictureImpl *This = impl_from_IDispatch(iface);
 
-  return IPicture_Release(This);
+  return IPicture_Release((IPicture *)This);
 }
 
 /************************************************************************

dlls/oleaut32/typelib.c

@@ -885,8 +885,10 @@ typedef struct tagITypeLibImpl
 static const ITypeLib2Vtbl tlbvt;
 static const ITypeCompVtbl tlbtcvt;
 
-#define _ITypeComp_Offset(impl) ((int)(&(((impl*)0)->lpVtblTypeComp)))
-#define ICOM_THIS_From_ITypeComp(impl, iface) impl* This = (impl*)(((char*)iface)-_ITypeComp_Offset(impl))
+static inline ITypeLibImpl *impl_from_ITypeComp( ITypeComp *iface )
+{
+    return (ITypeLibImpl *)((char*)iface - FIELD_OFFSET(ITypeLibImpl, lpVtblTypeComp));
+}
 
 /* ITypeLib methods */
 static ITypeLib2* ITypeLib2_Constructor_MSFT(LPVOID pLib, DWORD dwTLBLength);
@@ -995,6 +997,11 @@ typedef struct tagITypeInfoImpl
     struct tagITypeInfoImpl * next;
 } ITypeInfoImpl;
 
+static inline ITypeInfoImpl *info_impl_from_ITypeComp( ITypeComp *iface )
+{
+    return (ITypeInfoImpl *)((char*)iface - FIELD_OFFSET(ITypeInfoImpl, lpVtblTypeComp));
+}
+
 static const ITypeInfo2Vtbl tinfvt;
 static const ITypeCompVtbl  tcompvt;
 
@@ -4003,23 +4010,23 @@ static const ITypeLib2Vtbl tlbvt = {
 
 static HRESULT WINAPI ITypeLibComp_fnQueryInterface(ITypeComp * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_ITypeComp(ITypeLibImpl, iface);
+    ITypeLibImpl *This = impl_from_ITypeComp(iface);
 
-    return ITypeInfo_QueryInterface((ITypeInfo *)This, riid, ppv);
+    return ITypeLib2_QueryInterface((ITypeLib *)This, riid, ppv);
 }
 
 static ULONG WINAPI ITypeLibComp_fnAddRef(ITypeComp * iface)
 {
-    ICOM_THIS_From_ITypeComp(ITypeLibImpl, iface);
+    ITypeLibImpl *This = impl_from_ITypeComp(iface);
 
-    return ITypeInfo_AddRef((ITypeInfo *)This);
+    return ITypeLib2_AddRef((ITypeLib2 *)This);
 }
 
 static ULONG WINAPI ITypeLibComp_fnRelease(ITypeComp * iface)
 {
-    ICOM_THIS_From_ITypeComp(ITypeLibImpl, iface);
+    ITypeLibImpl *This = impl_from_ITypeComp(iface);
 
-    return ITypeInfo_Release((ITypeInfo *)This);
+    return ITypeLib2_Release((ITypeLib2 *)This);
 }
 
 static HRESULT WINAPI ITypeLibComp_fnBind(
@@ -5955,21 +5962,21 @@ HRESULT WINAPI CreateDispTypeInfo(
 
 static HRESULT WINAPI ITypeComp_fnQueryInterface(ITypeComp * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_ITypeComp(ITypeInfoImpl, iface);
+    ITypeInfoImpl *This = info_impl_from_ITypeComp(iface);
 
     return ITypeInfo_QueryInterface((ITypeInfo *)This, riid, ppv);
 }
 
 static ULONG WINAPI ITypeComp_fnAddRef(ITypeComp * iface)
 {
-    ICOM_THIS_From_ITypeComp(ITypeInfoImpl, iface);
+    ITypeInfoImpl *This = info_impl_from_ITypeComp(iface);
 
     return ITypeInfo_AddRef((ITypeInfo *)This);
 }
 
 static ULONG WINAPI ITypeComp_fnRelease(ITypeComp * iface)
 {
-    ICOM_THIS_From_ITypeComp(ITypeInfoImpl, iface);
+    ITypeInfoImpl *This = info_impl_from_ITypeComp(iface);
 
     return ITypeInfo_Release((ITypeInfo *)This);
 }
@@ -5983,7 +5990,7 @@ static HRESULT WINAPI ITypeComp_fnBind(
     DESCKIND * pDescKind,
     BINDPTR * pBindPtr)
 {
-    ICOM_THIS_From_ITypeComp(ITypeInfoImpl, iface);
+    ITypeInfoImpl *This = info_impl_from_ITypeComp(iface);
     TLBFuncDesc * pFDesc;
     TLBVarDesc * pVDesc;
 

dlls/oleaut32/typelib2.c

@@ -166,8 +166,10 @@ typedef struct tagICreateTypeLib2Impl
     struct tagICreateTypeInfo2Impl *last_typeinfo;
 } ICreateTypeLib2Impl;
 
-#define _ITypeLib2_Offset(impl) ((int)(&(((impl*)0)->lpVtblTypeLib2)))
-#define ICOM_THIS_From_ITypeLib2(impl, iface) impl* This = (impl*)(((char*)iface)-_ITypeLib2_Offset(impl))
+static inline ICreateTypeLib2Impl *impl_from_ITypeLib2( ITypeLib2 *iface )
+{
+    return (ICreateTypeLib2Impl *)((char*)iface - FIELD_OFFSET(ICreateTypeLib2Impl, lpVtblTypeLib2));
+}
 
 typedef struct tagICreateTypeInfo2Impl
 {
@@ -192,8 +194,10 @@ typedef struct tagICreateTypeInfo2Impl
     struct tagICreateTypeInfo2Impl *next_typeinfo;
 } ICreateTypeInfo2Impl;
 
-#define _ITypeInfo2_Offset(impl) ((int)(&(((impl*)0)->lpVtblTypeInfo2)))
-#define ICOM_THIS_From_ITypeInfo2(impl, iface) impl* This = (impl*)(((char*)iface)-_ITypeInfo2_Offset(impl))
+static inline ICreateTypeInfo2Impl *impl_from_ITypeInfo2( ITypeInfo2 *iface )
+{
+    return (ICreateTypeInfo2Impl *)((char*)iface - FIELD_OFFSET(ICreateTypeInfo2Impl, lpVtblTypeInfo2));
+}
 
 static ULONG WINAPI ICreateTypeLib2_fnRelease(ICreateTypeLib2 *iface);
 
@@ -2198,7 +2202,7 @@ static HRESULT WINAPI ICreateTypeInfo2_fnSetName(
  */
 static HRESULT WINAPI ITypeInfo2_fnQueryInterface(ITypeInfo2 * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_ITypeInfo2(ICreateTypeInfo2Impl, iface);
+    ICreateTypeInfo2Impl *This = impl_from_ITypeInfo2(iface);
 
     return ICreateTypeInfo2_QueryInterface((ICreateTypeInfo2 *)This, riid, ppv);
 }
@@ -2210,7 +2214,7 @@ static HRESULT WINAPI ITypeInfo2_fnQueryInterface(ITypeInfo2 * iface, REFIID rii
  */
 static ULONG WINAPI ITypeInfo2_fnAddRef(ITypeInfo2 * iface)
 {
-    ICOM_THIS_From_ITypeInfo2(ICreateTypeInfo2Impl, iface);
+    ICreateTypeInfo2Impl *This = impl_from_ITypeInfo2(iface);
 
     return ICreateTypeInfo2_AddRef((ICreateTypeInfo2 *)This);
 }
@@ -2222,7 +2226,7 @@ static ULONG WINAPI ITypeInfo2_fnAddRef(ITypeInfo2 * iface)
  */
 static ULONG WINAPI ITypeInfo2_fnRelease(ITypeInfo2 * iface)
 {
-    ICOM_THIS_From_ITypeInfo2(ICreateTypeInfo2Impl, iface);
+    ICreateTypeInfo2Impl *This = impl_from_ITypeInfo2(iface);
 
     return ICreateTypeInfo2_Release((ICreateTypeInfo2 *)This);
 }
@@ -2461,7 +2465,7 @@ static HRESULT WINAPI ITypeInfo2_fnGetContainingTypeLib(
         ITypeLib** ppTLib,
         UINT* pIndex)
 {
-    ICOM_THIS_From_ITypeInfo2(ICreateTypeInfo2Impl, iface);
+    ICreateTypeInfo2Impl *This = impl_from_ITypeInfo2(iface);
 
     TRACE("(%p,%p,%p)\n", iface, ppTLib, pIndex);
     
@@ -3431,7 +3435,7 @@ static HRESULT WINAPI ICreateTypeLib2_fnSetHelpStringDll(
  */
 static HRESULT WINAPI ITypeLib2_fnQueryInterface(ITypeLib2 * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     return ICreateTypeLib2_QueryInterface((ICreateTypeLib2 *)This, riid, ppv);
 }
@@ -3443,7 +3447,7 @@ static HRESULT WINAPI ITypeLib2_fnQueryInterface(ITypeLib2 * iface, REFIID riid,
  */
 static ULONG WINAPI ITypeLib2_fnAddRef(ITypeLib2 * iface)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     return ICreateTypeLib2_AddRef((ICreateTypeLib2 *)This);
 }
@@ -3455,7 +3459,7 @@ static ULONG WINAPI ITypeLib2_fnAddRef(ITypeLib2 * iface)
  */
 static ULONG WINAPI ITypeLib2_fnRelease(ITypeLib2 * iface)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     return ICreateTypeLib2_Release((ICreateTypeLib2 *)This);
 }
@@ -3468,7 +3472,7 @@ static ULONG WINAPI ITypeLib2_fnRelease(ITypeLib2 * iface)
 static UINT WINAPI ITypeLib2_fnGetTypeInfoCount(
         ITypeLib2 * iface)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     TRACE("(%p)\n", iface);
 
@@ -3485,7 +3489,7 @@ static HRESULT WINAPI ITypeLib2_fnGetTypeInfo(
         UINT index,
         ITypeInfo** ppTInfo)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     TRACE("(%p,%d,%p)\n", iface, index, ppTInfo);
 
@@ -3506,7 +3510,7 @@ static HRESULT WINAPI ITypeLib2_fnGetTypeInfoType(
         UINT index,
         TYPEKIND* pTKind)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     TRACE("(%p,%d,%p)\n", iface, index, pTKind);
 
@@ -3529,7 +3533,7 @@ static HRESULT WINAPI ITypeLib2_fnGetTypeInfoOfGuid(
         REFGUID guid,
         ITypeInfo** ppTinfo)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     int guidoffset;
     int typeinfo;
@@ -3554,9 +3558,9 @@ static HRESULT WINAPI ITypeLib2_fnGetLibAttr(
         ITypeLib2 * iface,
         TLIBATTR** ppTLibAttr)
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%p), stub!\n", iface, ppTLibAttr);
+    FIXME("(%p,%p), stub!\n", This, ppTLibAttr);
 
     return E_OUTOFMEMORY;
 }
@@ -3570,9 +3574,9 @@ static HRESULT WINAPI ITypeLib2_fnGetTypeComp(
         ITypeLib2 * iface,
         ITypeComp** ppTComp)
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%p), stub!\n", iface, ppTComp);
+    FIXME("(%p,%p), stub!\n", This, ppTComp);
 
     return E_OUTOFMEMORY;
 }
@@ -3590,9 +3594,9 @@ static HRESULT WINAPI ITypeLib2_fnGetDocumentation(
         DWORD* pdwHelpContext,
         BSTR* pBstrHelpFile)
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%d,%p,%p,%p,%p), stub!\n", iface, index, pBstrName, pBstrDocString, pdwHelpContext, pBstrHelpFile);
+    FIXME("(%p,%d,%p,%p,%p,%p), stub!\n", This, index, pBstrName, pBstrDocString, pdwHelpContext, pBstrHelpFile);
 
     return E_OUTOFMEMORY;
 }
@@ -3608,7 +3612,7 @@ static HRESULT WINAPI ITypeLib2_fnIsName(
         ULONG lHashVal,
         BOOL* pfName)
 {
-    ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface);
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
     char *encoded_name;
     int nameoffset;
@@ -3646,9 +3650,9 @@ static HRESULT WINAPI ITypeLib2_fnFindName(
         MEMBERID* rgMemId,
         USHORT* pcFound)
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%s,%lx,%p,%p,%p), stub!\n", iface, debugstr_w(szNameBuf), lHashVal, ppTInfo, rgMemId, pcFound);
+    FIXME("(%p,%s,%lx,%p,%p,%p), stub!\n", This, debugstr_w(szNameBuf), lHashVal, ppTInfo, rgMemId, pcFound);
 
     return E_OUTOFMEMORY;
 }
@@ -3662,9 +3666,9 @@ static void WINAPI ITypeLib2_fnReleaseTLibAttr(
         ITypeLib2 * iface,
         TLIBATTR* pTLibAttr)
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%p), stub!\n", iface, pTLibAttr);
+    FIXME("(%p,%p), stub!\n", This, pTLibAttr);
 }
 
 /******************************************************************************
@@ -3682,9 +3686,9 @@ static HRESULT WINAPI ITypeLib2_fnGetCustData(
         REFGUID guid,      /* [I] The GUID under which the custom data is stored. */
         VARIANT* pVarVal)  /* [O] The custom data. */
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%s,%p), stub!\n", iface, debugstr_guid(guid), pVarVal);
+    FIXME("(%p,%s,%p), stub!\n", This, debugstr_guid(guid), pVarVal);
 
     return E_OUTOFMEMORY;
 }
@@ -3705,9 +3709,9 @@ static HRESULT WINAPI ITypeLib2_fnGetLibStatistics(
         ULONG* pcUniqueNames,   /* [O] The number of unique names in the type library. */
         ULONG* pcchUniqueNames) /* [O] The number of changed (?) characters in names in the type library. */
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%p,%p), stub!\n", iface, pcUniqueNames, pcchUniqueNames);
+    FIXME("(%p,%p,%p), stub!\n", This, pcUniqueNames, pcchUniqueNames);
 
     return E_OUTOFMEMORY;
 }
@@ -3730,9 +3734,9 @@ static HRESULT WINAPI ITypeLib2_fnGetDocumentation2(
         DWORD* pdwHelpStringContext,
         BSTR* pbstrHelpStringDll)
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%d,%ld,%p,%p,%p), stub!\n", iface, index, lcid, pbstrHelpString, pdwHelpStringContext, pbstrHelpStringDll);
+    FIXME("(%p,%d,%ld,%p,%p,%p), stub!\n", This, index, lcid, pbstrHelpString, pdwHelpStringContext, pbstrHelpStringDll);
 
     return E_OUTOFMEMORY;
 }
@@ -3751,9 +3755,9 @@ static HRESULT WINAPI ITypeLib2_fnGetAllCustData(
         ITypeLib2 * iface,   /* [I] The type library in which to find the custom data. */
         CUSTDATA* pCustData) /* [O] The structure in which to place the custom data. */
 {
-/*     ICOM_THIS_From_ITypeLib2(ICreateTypeLib2Impl, iface); */
+    ICreateTypeLib2Impl *This = impl_from_ITypeLib2(iface);
 
-    FIXME("(%p,%p), stub!\n", iface, pCustData);
+    FIXME("(%p,%p), stub!\n", This, pCustData);
 
     return E_OUTOFMEMORY;
 }

dlls/quartz/filesource.c

@@ -58,11 +58,10 @@ static const IAsyncReaderVtbl FileAsyncReader_Vtbl;
 
 static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
 
-#define _IFileSourceFilter_Offset ((int)(&(((AsyncReader*)0)->lpVtblFSF)))
-#define ICOM_THIS_From_IFileSourceFilter(impl, iface) impl* This = (impl*)(((char*)iface)-_IFileSourceFilter_Offset);
-
-#define _IAsyncReader_Offset ((int)(&(((FileAsyncReader*)0)->lpVtblAR)))
-#define ICOM_THIS_From_IAsyncReader(impl, iface) impl* This = (impl*)(((char*)iface)-_IAsyncReader_Offset);
+static inline AsyncReader *impl_from_IFileSourceFilter( IFileSourceFilter *iface )
+{
+    return (AsyncReader *)((char*)iface - FIELD_OFFSET(AsyncReader, lpVtblFSF));
+}
 
 static HRESULT process_extensions(HKEY hkeyExtensions, LPCOLESTR pszFileName, GUID * majorType, GUID * minorType)
 {
@@ -541,21 +540,21 @@ static const IBaseFilterVtbl AsyncReader_Vtbl =
 
 static HRESULT WINAPI FileSource_QueryInterface(IFileSourceFilter * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_IFileSourceFilter(AsyncReader, iface);
+    AsyncReader *This = impl_from_IFileSourceFilter(iface);
 
     return IBaseFilter_QueryInterface((IFileSourceFilter*)&This->lpVtbl, riid, ppv);
 }
 
 static ULONG WINAPI FileSource_AddRef(IFileSourceFilter * iface)
 {
-    ICOM_THIS_From_IFileSourceFilter(AsyncReader, iface);
+    AsyncReader *This = impl_from_IFileSourceFilter(iface);
 
     return IBaseFilter_AddRef((IFileSourceFilter*)&This->lpVtbl);
 }
 
 static ULONG WINAPI FileSource_Release(IFileSourceFilter * iface)
 {
-    ICOM_THIS_From_IFileSourceFilter(AsyncReader, iface);
+    AsyncReader *This = impl_from_IFileSourceFilter(iface);
 
     return IBaseFilter_Release((IFileSourceFilter*)&This->lpVtbl);
 }
@@ -565,7 +564,7 @@ static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFi
     HRESULT hr;
     HANDLE hFile;
     IAsyncReader * pReader = NULL;
-    ICOM_THIS_From_IFileSourceFilter(AsyncReader, iface);
+    AsyncReader *This = impl_from_IFileSourceFilter(iface);
 
     TRACE("(%s, %p)\n", debugstr_w(pszFileName), pmt);
 
@@ -634,7 +633,7 @@ static HRESULT WINAPI FileSource_Load(IFileSourceFilter * iface, LPCOLESTR pszFi
 
 static HRESULT WINAPI FileSource_GetCurFile(IFileSourceFilter * iface, LPOLESTR * ppszFileName, AM_MEDIA_TYPE * pmt)
 {
-    ICOM_THIS_From_IFileSourceFilter(AsyncReader, iface);
+    AsyncReader *This = impl_from_IFileSourceFilter(iface);
     
     TRACE("(%p, %p)\n", ppszFileName, pmt);
 
@@ -697,6 +696,11 @@ typedef struct FileAsyncReader
     CRITICAL_SECTION csList; /* critical section to protect operations on list */
 } FileAsyncReader;
 
+static inline FileAsyncReader *impl_from_IAsyncReader( IAsyncReader *iface )
+{
+    return (FileAsyncReader *)((char*)iface - FIELD_OFFSET(FileAsyncReader, lpVtblAR));
+}
+
 static HRESULT AcceptProcAFR(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 {
     AsyncReader *This = (AsyncReader *)iface;
@@ -865,21 +869,21 @@ static HRESULT FileAsyncReader_Construct(HANDLE hFile, IBaseFilter * pBaseFilter
 
 static HRESULT WINAPI FileAsyncReader_QueryInterface(IAsyncReader * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     return IPin_QueryInterface((IPin *)This, riid, ppv);
 }
 
 static ULONG WINAPI FileAsyncReader_AddRef(IAsyncReader * iface)
 {
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     return IPin_AddRef((IPin *)This);
 }
 
 static ULONG WINAPI FileAsyncReader_Release(IAsyncReader * iface)
 {
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     return IPin_Release((IPin *)This);
 }
@@ -947,7 +951,7 @@ static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample
     DATAREQUEST * pDataRq;
     BYTE * pBuffer;
     HRESULT hr = S_OK;
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     TRACE("(%p, %lx)\n", pSample, dwUser);
 
@@ -1025,7 +1029,7 @@ static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dw
 {
     HRESULT hr = S_OK;
     DATAREQUEST * pDataRq = NULL;
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     TRACE("(%lu, %p, %p)\n", dwTimeout, ppSample, pdwUser);
 
@@ -1115,7 +1119,7 @@ static HRESULT WINAPI FileAsyncReader_SyncRead(IAsyncReader * iface, LONGLONG ll
 {
     OVERLAPPED ovl;
     HRESULT hr = S_OK;
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     TRACE("(%lx%08lx, %ld, %p)\n", (ULONG)(llPosition >> 32), (ULONG)llPosition, lLength, pBuffer);
 
@@ -1150,7 +1154,7 @@ static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pT
 {
     DWORD dwSizeLow;
     DWORD dwSizeHigh;
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     TRACE("(%p, %p)\n", pTotal, pAvailable);
 
@@ -1167,7 +1171,7 @@ static HRESULT WINAPI FileAsyncReader_Length(IAsyncReader * iface, LONGLONG * pT
 
 static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
 {
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     TRACE("()\n");
 
@@ -1182,7 +1186,7 @@ static HRESULT WINAPI FileAsyncReader_BeginFlush(IAsyncReader * iface)
 
 static HRESULT WINAPI FileAsyncReader_EndFlush(IAsyncReader * iface)
 {
-    ICOM_THIS_From_IAsyncReader(FileAsyncReader, iface);
+    FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
     TRACE("()\n");
 

dlls/quartz/filtermapper.c

@@ -52,8 +52,10 @@ typedef struct FilterMapper2Impl
 static const IFilterMapper2Vtbl fm2vtbl;
 static const IFilterMapperVtbl fmvtbl;
 
-#define _IFilterMapper_Offset ((int)(&(((FilterMapper2Impl*)0)->lpVtblFilterMapper)))
-#define ICOM_THIS_From_IFilterMapper(impl, iface) impl* This = (impl*)(((char*)iface)-_IFilterMapper_Offset)
+static inline FilterMapper2Impl *impl_from_IFilterMapper( IFilterMapper *iface )
+{
+    return (FilterMapper2Impl *)((char*)iface - FIELD_OFFSET(FilterMapper2Impl, lpVtblFilterMapper));
+}
 
 static const WCHAR wszClsidSlash[] = {'C','L','S','I','D','\\',0};
 static const WCHAR wszSlashInstance[] = {'\\','I','n','s','t','a','n','c','e','\\',0};
@@ -1053,7 +1055,7 @@ static const IFilterMapper2Vtbl fm2vtbl =
 
 static HRESULT WINAPI FilterMapper_QueryInterface(IFilterMapper * iface, REFIID riid, LPVOID *ppv)
 {
-    ICOM_THIS_From_IFilterMapper(FilterMapper2Impl, iface);
+    FilterMapper2Impl *This = impl_from_IFilterMapper(iface);
 
     TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), ppv);
 
@@ -1062,14 +1064,14 @@ static HRESULT WINAPI FilterMapper_QueryInterface(IFilterMapper * iface, REFIID
 
 static ULONG WINAPI FilterMapper_AddRef(IFilterMapper * iface)
 {
-    ICOM_THIS_From_IFilterMapper(FilterMapper2Impl, iface);
+    FilterMapper2Impl *This = impl_from_IFilterMapper(iface);
 
     return FilterMapper2_AddRef((IFilterMapper2*)This);
 }
 
 static ULONG WINAPI FilterMapper_Release(IFilterMapper * iface)
 {
-    ICOM_THIS_From_IFilterMapper(FilterMapper2Impl, iface);
+    FilterMapper2Impl *This = impl_from_IFilterMapper(iface);
 
     return FilterMapper2_Release((IFilterMapper2*)This);
 }
@@ -1088,7 +1090,7 @@ static HRESULT WINAPI FilterMapper_EnumMatchingFilters(
     CLSID clsOutMaj,
     CLSID clsOutSub)
 {
-    ICOM_THIS_From_IFilterMapper(FilterMapper2Impl, iface);
+    FilterMapper2Impl *This = impl_from_IFilterMapper(iface);
     GUID InputType[2];
     GUID OutputType[2];
     IEnumMoniker* ppEnumMoniker;

dlls/quartz/parser.c

@@ -54,8 +54,11 @@ static HRESULT Parser_ChangeRate(LPVOID iface);
 
 static HRESULT Parser_InputPin_Construct(const PIN_INFO * pPinInfo, SAMPLEPROC pSampleProc, LPVOID pUserData, QUERYACCEPTPROC pQueryAccept, LPCRITICAL_SECTION pCritSec, IPin ** ppPin);
 
-#define _IMediaSeeking_Offset ((int)(&(((Parser_OutputPin*)0)->mediaSeeking)))
-#define ICOM_THIS_From_IMediaSeeking(impl, iface) impl* This = (impl*)(((char*)iface)-_IMediaSeeking_Offset);
+static inline Parser_OutputPin *impl_from_IMediaSeeking( IMediaSeeking *iface )
+{
+    return (Parser_OutputPin *)((char*)iface - FIELD_OFFSET(Parser_OutputPin, mediaSeeking.lpVtbl));
+}
+
 
 HRESULT Parser_Create(ParserImpl* pParser, const CLSID* pClsid, PFN_PROCESS_SAMPLE fnProcessSample, PFN_QUERY_ACCEPT fnQueryAccept, PFN_PRE_CONNECT fnPreConnect)
 {
@@ -550,21 +553,21 @@ static HRESULT Parser_ChangeRate(LPVOID iface)
 
 static HRESULT WINAPI Parser_Seeking_QueryInterface(IMediaSeeking * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_IMediaSeeking(Parser_OutputPin, iface);
+    Parser_OutputPin *This = impl_from_IMediaSeeking(iface);
 
     return IUnknown_QueryInterface((IUnknown *)This, riid, ppv);
 }
 
 static ULONG WINAPI Parser_Seeking_AddRef(IMediaSeeking * iface)
 {
-    ICOM_THIS_From_IMediaSeeking(Parser_OutputPin, iface);
+    Parser_OutputPin *This = impl_from_IMediaSeeking(iface);
 
     return IUnknown_AddRef((IUnknown *)This);
 }
 
 static ULONG WINAPI Parser_Seeking_Release(IMediaSeeking * iface)
 {
-    ICOM_THIS_From_IMediaSeeking(Parser_OutputPin, iface);
+    Parser_OutputPin *This = impl_from_IMediaSeeking(iface);
 
     return IUnknown_Release((IUnknown *)This);
 }

dlls/quartz/pin.c

@@ -37,8 +37,11 @@ static const IPinVtbl PullPin_Vtbl;
 #define ALIGNDOWN(value,boundary) ((value) & ~(boundary-1))
 #define ALIGNUP(value,boundary) (ALIGNDOWN(value - 1, boundary) + boundary)
 
-#define _IMemInputPin_Offset ((int)(&(((InputPin*)0)->lpVtblMemInput)))
-#define ICOM_THIS_From_IMemInputPin(impl, iface) impl* This = (impl*)(((char*)iface)-_IMemInputPin_Offset);
+static inline InputPin *impl_from_IMemInputPin( IMemInputPin *iface )
+{
+    return (InputPin *)((char*)iface - FIELD_OFFSET(InputPin, lpVtblMemInput));
+}
+
 
 static void Copy_PinInfo(PIN_INFO * pDest, const PIN_INFO * pSrc)
 {
@@ -529,28 +532,28 @@ static const IPinVtbl InputPin_Vtbl =
 
 HRESULT WINAPI MemInputPin_QueryInterface(IMemInputPin * iface, REFIID riid, LPVOID * ppv)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     return IPin_QueryInterface((IPin *)&This->pin, riid, ppv);
 }
 
 ULONG WINAPI MemInputPin_AddRef(IMemInputPin * iface)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     return IPin_AddRef((IPin *)&This->pin);
 }
 
 ULONG WINAPI MemInputPin_Release(IMemInputPin * iface)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     return IPin_Release((IPin *)&This->pin);
 }
 
 HRESULT WINAPI MemInputPin_GetAllocator(IMemInputPin * iface, IMemAllocator ** ppAllocator)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     TRACE("(%p/%p)->(%p)\n", This, iface, ppAllocator);
 
@@ -563,7 +566,7 @@ HRESULT WINAPI MemInputPin_GetAllocator(IMemInputPin * iface, IMemAllocator ** p
 
 HRESULT WINAPI MemInputPin_NotifyAllocator(IMemInputPin * iface, IMemAllocator * pAllocator, BOOL bReadOnly)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     TRACE("(%p/%p)->(%p, %d)\n", This, iface, pAllocator, bReadOnly);
 
@@ -578,7 +581,7 @@ HRESULT WINAPI MemInputPin_NotifyAllocator(IMemInputPin * iface, IMemAllocator *
 
 HRESULT WINAPI MemInputPin_GetAllocatorRequirements(IMemInputPin * iface, ALLOCATOR_PROPERTIES * pProps)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     TRACE("(%p/%p)->(%p)\n", This, iface, pProps);
 
@@ -589,7 +592,7 @@ HRESULT WINAPI MemInputPin_GetAllocatorRequirements(IMemInputPin * iface, ALLOCA
 
 HRESULT WINAPI MemInputPin_Receive(IMemInputPin * iface, IMediaSample * pSample)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     /* this trace commented out for performance reasons */
     /*TRACE("(%p/%p)->(%p)\n", This, iface, pSample);*/
@@ -600,7 +603,7 @@ HRESULT WINAPI MemInputPin_Receive(IMemInputPin * iface, IMediaSample * pSample)
 HRESULT WINAPI MemInputPin_ReceiveMultiple(IMemInputPin * iface, IMediaSample ** pSamples, long nSamples, long *nSamplesProcessed)
 {
     HRESULT hr = S_OK;
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     TRACE("(%p/%p)->(%p, %ld, %p)\n", This, iface, pSamples, nSamples, nSamplesProcessed);
 
@@ -616,7 +619,7 @@ HRESULT WINAPI MemInputPin_ReceiveMultiple(IMemInputPin * iface, IMediaSample **
 
 HRESULT WINAPI MemInputPin_ReceiveCanBlock(IMemInputPin * iface)
 {
-    ICOM_THIS_From_IMemInputPin(InputPin, iface);
+    InputPin *This = impl_from_IMemInputPin(iface);
 
     FIXME("(%p/%p)->()\n", This, iface);