avifil32: Use an iface instead of a vtbl pointer in IAVIStreamImpl.

dlls/avifil32/icmstream.c

@@ -72,7 +72,7 @@ static const struct IAVIStreamVtbl iicmst = {
 
 typedef struct _IAVIStreamImpl {
   /* IUnknown stuff */
-  const IAVIStreamVtbl *lpVtbl;
+  IAVIStream         IAVIStream_iface;
   LONG               ref;
 
   /* IAVIStream stuff */
@@ -107,6 +107,11 @@ static HRESULT AVIFILE_EncodeFrame(IAVIStreamImpl *This,
 				   LPBITMAPINFOHEADER lpbi, LPVOID lpBits);
 static HRESULT AVIFILE_OpenGetFrame(IAVIStreamImpl *This);
 
+static inline IAVIStreamImpl *impl_from_IAVIStream(IAVIStream *iface)
+{
+  return CONTAINING_RECORD(iface, IAVIStreamImpl, IAVIStream_iface);
+}
+
 static inline void AVIFILE_Reset(IAVIStreamImpl *This)
 {
   This->lCurrent      = -1;
@@ -128,10 +133,10 @@ HRESULT AVIFILE_CreateICMStream(REFIID riid, LPVOID *ppv)
   if (pstream == NULL)
     return AVIERR_MEMORY;
 
-  pstream->lpVtbl  = &iicmst;
+  pstream->IAVIStream_iface.lpVtbl = &iicmst;
   AVIFILE_Reset(pstream);
 
-  hr = IAVIStream_QueryInterface((IAVIStream*)pstream, riid, ppv);
+  hr = IAVIStream_QueryInterface(&pstream->IAVIStream_iface, riid, ppv);
   if (FAILED(hr))
     HeapFree(GetProcessHeap(), 0, pstream);
 
@@ -141,7 +146,7 @@ HRESULT AVIFILE_CreateICMStream(REFIID riid, LPVOID *ppv)
 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
 						  REFIID refiid, LPVOID *obj)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
 
@@ -158,7 +163,7 @@ static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
 
 static ULONG WINAPI ICMStream_fnAddRef(IAVIStream *iface)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
   ULONG ref = InterlockedIncrement(&This->ref);
 
   TRACE("(%p) -> %d\n", iface, ref);
@@ -172,7 +177,7 @@ static ULONG WINAPI ICMStream_fnAddRef(IAVIStream *iface)
 
 static ULONG WINAPI ICMStream_fnRelease(IAVIStream* iface)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
   ULONG ref = InterlockedDecrement(&This->ref);
 
   TRACE("(%p) -> %d\n", iface, ref);
@@ -231,7 +236,7 @@ static ULONG WINAPI ICMStream_fnRelease(IAVIStream* iface)
 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 					  LPARAM lParam2)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   ICINFO               icinfo;
   ICCOMPRESSFRAMES     icFrames;
@@ -320,7 +325,7 @@ static HRESULT WINAPI ICMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 					LONG size)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   TRACE("(%p,%p,%d)\n", iface, psi, size);
 
@@ -339,7 +344,7 @@ static HRESULT WINAPI ICMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 static LONG WINAPI ICMStream_fnFindSample(IAVIStream *iface, LONG pos,
 					   LONG flags)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   TRACE("(%p,%d,0x%08X)\n",iface,pos,flags);
 
@@ -376,7 +381,7 @@ static LONG WINAPI ICMStream_fnFindSample(IAVIStream *iface, LONG pos,
 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 					      LPVOID format, LONG *formatsize)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   LPBITMAPINFOHEADER lpbi;
   HRESULT            hr;
@@ -427,7 +432,7 @@ static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream *iface, LONG pos,
 					     LPVOID format, LONG formatsize)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   TRACE("(%p,%d,%p,%d)\n", iface, pos, format, formatsize);
 
@@ -579,7 +584,7 @@ static HRESULT WINAPI ICMStream_fnRead(IAVIStream *iface, LONG start,
 					LONG buffersize, LPLONG bytesread,
 					LPLONG samplesread)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   LPBITMAPINFOHEADER lpbi;
 
@@ -673,7 +678,7 @@ static HRESULT WINAPI ICMStream_fnWrite(IAVIStream *iface, LONG start,
 					 LPLONG sampwritten,
 					 LPLONG byteswritten)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   HRESULT hr;
 
@@ -718,7 +723,7 @@ static HRESULT WINAPI ICMStream_fnWrite(IAVIStream *iface, LONG start,
 static HRESULT WINAPI ICMStream_fnDelete(IAVIStream *iface, LONG start,
 					  LONG samples)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   TRACE("(%p,%d,%d)\n", iface, start, samples);
 
@@ -728,7 +733,7 @@ static HRESULT WINAPI ICMStream_fnDelete(IAVIStream *iface, LONG start,
 static HRESULT WINAPI ICMStream_fnReadData(IAVIStream *iface, DWORD fcc,
 					    LPVOID lp, LPLONG lpread)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   TRACE("(%p,0x%08X,%p,%p)\n", iface, fcc, lp, lpread);
 
@@ -740,7 +745,7 @@ static HRESULT WINAPI ICMStream_fnReadData(IAVIStream *iface, DWORD fcc,
 static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream *iface, DWORD fcc,
 					     LPVOID lp, LONG size)
 {
-  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
+  IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 
   TRACE("(%p,0x%08x,%p,%d)\n", iface, fcc, lp, size);