transform.c

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/*
 * Transform Filter (Base for decoders, etc...)
 *
 * Copyright 2005 Christian Costa
 * Copyright 2010 Aric Stewart, CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
#include "config.h"
#include <stdarg.h>
 
#define COBJMACROS
 
#include "windef.h"
#include "winbase.h"
#include "dshow.h"
#include "amvideo.h"
#include "strmif.h"
#include "vfw.h"
 
#include <assert.h>
 
#include "wine/unicode.h"
#include "wine/debug.h"
#include "wine/strmbase.h"
#include "strmbase_private.h"
 
WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
 
static const WCHAR wcsInputPinName[] = {'i','n','p','u','t',' ','p','i','n',0};
static const WCHAR wcsOutputPinName[] = {'o','u','t','p','u','t',' ','p','i','n',0};
 
static const IPinVtbl TransformFilter_InputPin_Vtbl;
static const IPinVtbl TransformFilter_OutputPin_Vtbl;
static const IQualityControlVtbl TransformFilter_QualityControl_Vtbl;
 
static inline BaseInputPin *impl_BaseInputPin_from_BasePin( BasePin *iface )
{
    return CONTAINING_RECORD(iface, BaseInputPin, pin);
}
 
static inline BasePin *impl_BasePin_from_IPin( IPin *iface )
{
    return CONTAINING_RECORD(iface, BasePin, IPin_iface);
}
 
static inline BaseInputPin *impl_BaseInputPin_from_IPin( IPin *iface )
{
    return CONTAINING_RECORD(iface, BaseInputPin, pin.IPin_iface);
}
 
static inline BaseOutputPin *impl_BaseOutputPin_from_IPin( IPin *iface )
{
    return CONTAINING_RECORD(iface, BaseOutputPin, pin.IPin_iface);
}
 
static inline TransformFilter *impl_from_IBaseFilter( IBaseFilter *iface )
{
    return CONTAINING_RECORD(iface, TransformFilter, filter.IBaseFilter_iface);
}
 
static inline TransformFilter *impl_from_BaseFilter( BaseFilter *iface )
{
    return CONTAINING_RECORD(iface, TransformFilter, filter);
}
 
static HRESULT WINAPI TransformFilter_Input_CheckMediaType(BasePin *iface, const AM_MEDIA_TYPE * pmt)
{
    BaseInputPin* This = impl_BaseInputPin_from_BasePin(iface);
    TransformFilter * pTransform;
 
    TRACE("%p\n", iface);
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
 
    if (pTransform->pFuncsTable->pfnCheckInputType)
        return pTransform->pFuncsTable->pfnCheckInputType(pTransform, pmt);
    /* Assume OK if there's no query method (the connection will fail if
       needed) */
    return S_OK;
}
 
static HRESULT WINAPI TransformFilter_Input_Receive(BaseInputPin *This, IMediaSample *pInSample)
{
    HRESULT hr;
    TransformFilter * pTransform;
    TRACE("%p\n", This);
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
 
    EnterCriticalSection(&pTransform->csReceive);
    if (pTransform->filter.state == State_Stopped)
    {
        LeaveCriticalSection(&pTransform->csReceive);
        return VFW_E_WRONG_STATE;
    }
 
    if (This->end_of_stream || This->flushing)
    {
        LeaveCriticalSection(&pTransform->csReceive);
        return S_FALSE;
    }
 
    LeaveCriticalSection(&pTransform->csReceive);
    if (pTransform->pFuncsTable->pfnReceive)
        hr = pTransform->pFuncsTable->pfnReceive(pTransform, pInSample);
    else
        hr = S_FALSE;
 
    return hr;
}
 
static HRESULT WINAPI TransformFilter_Output_QueryAccept(IPin *iface, const AM_MEDIA_TYPE * pmt)
{
    BasePin *This = impl_BasePin_from_IPin(iface);
    TransformFilter *pTransformFilter = impl_from_IBaseFilter(This->pinInfo.pFilter);
    AM_MEDIA_TYPE* outpmt = &pTransformFilter->pmt;
    TRACE("%p\n", iface);
 
    if (IsEqualIID(&pmt->majortype, &outpmt->majortype)
        && (IsEqualIID(&pmt->subtype, &outpmt->subtype) || IsEqualIID(&outpmt->subtype, &GUID_NULL)))
        return S_OK;
    return S_FALSE;
}
 
static HRESULT WINAPI TransformFilter_Output_DecideBufferSize(BaseOutputPin *This, IMemAllocator *pAlloc, ALLOCATOR_PROPERTIES *ppropInputRequest)
{
    TransformFilter *pTransformFilter = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
    return pTransformFilter->pFuncsTable->pfnDecideBufferSize(pTransformFilter, pAlloc, ppropInputRequest);
}
 
static HRESULT WINAPI TransformFilter_Output_GetMediaType(BasePin *This, int iPosition, AM_MEDIA_TYPE *pmt)
{
    TransformFilter *pTransform = impl_from_IBaseFilter(This->pinInfo.pFilter);
 
    if (iPosition < 0)
        return E_INVALIDARG;
    if (iPosition > 0)
        return VFW_S_NO_MORE_ITEMS;
    CopyMediaType(pmt, &pTransform->pmt);
    return S_OK;
}
 
static IPin* WINAPI TransformFilter_GetPin(BaseFilter *iface, int pos)
{
    TransformFilter *This = impl_from_BaseFilter(iface);
 
    if (pos >= This->npins || pos < 0)
        return NULL;
 
    IPin_AddRef(This->ppPins[pos]);
    return This->ppPins[pos];
}
 
static LONG WINAPI TransformFilter_GetPinCount(BaseFilter *iface)
{
    TransformFilter *This = impl_from_BaseFilter(iface);
 
    return (This->npins+1);
}
 
static const BaseFilterFuncTable tfBaseFuncTable = {
    TransformFilter_GetPin,
    TransformFilter_GetPinCount
};
 
static const BaseInputPinFuncTable tf_input_BaseInputFuncTable = {
    {
        TransformFilter_Input_CheckMediaType,
        NULL,
        BasePinImpl_GetMediaTypeVersion,
        BasePinImpl_GetMediaType
    },
    TransformFilter_Input_Receive
};
 
static const BaseOutputPinFuncTable tf_output_BaseOutputFuncTable = {
    {
        NULL,
        BaseOutputPinImpl_AttemptConnection,
        BasePinImpl_GetMediaTypeVersion,
        TransformFilter_Output_GetMediaType
    },
    TransformFilter_Output_DecideBufferSize,
    BaseOutputPinImpl_DecideAllocator,
    BaseOutputPinImpl_BreakConnect
};
 
static HRESULT TransformFilter_Init(const IBaseFilterVtbl *pVtbl, const CLSID* pClsid, const TransformFilterFuncTable* pFuncsTable, TransformFilter* pTransformFilter)
{
    HRESULT hr;
    PIN_INFO piInput;
    PIN_INFO piOutput;
 
    BaseFilter_Init(&pTransformFilter->filter, pVtbl, pClsid, (DWORD_PTR)(__FILE__ ": TransformFilter.csFilter"), &tfBaseFuncTable);
 
    InitializeCriticalSection(&pTransformFilter->csReceive);
    pTransformFilter->csReceive.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__": TransformFilter.csReceive");
 
    /* pTransformFilter is already allocated */
    pTransformFilter->pFuncsTable = pFuncsTable;
    ZeroMemory(&pTransformFilter->pmt, sizeof(pTransformFilter->pmt));
    pTransformFilter->npins = 2;
 
    pTransformFilter->ppPins = CoTaskMemAlloc(2 * sizeof(IPin *));
 
    /* construct input pin */
    piInput.dir = PINDIR_INPUT;
    piInput.pFilter = &pTransformFilter->filter.IBaseFilter_iface;
    lstrcpynW(piInput.achName, wcsInputPinName, sizeof(piInput.achName) / sizeof(piInput.achName[0]));
    piOutput.dir = PINDIR_OUTPUT;
    piOutput.pFilter = &pTransformFilter->filter.IBaseFilter_iface;
    lstrcpynW(piOutput.achName, wcsOutputPinName, sizeof(piOutput.achName) / sizeof(piOutput.achName[0]));
 
    hr = BaseInputPin_Construct(&TransformFilter_InputPin_Vtbl, sizeof(BaseInputPin), &piInput,
            &tf_input_BaseInputFuncTable, &pTransformFilter->filter.csFilter, NULL, &pTransformFilter->ppPins[0]);
 
    if (SUCCEEDED(hr))
    {
        hr = BaseOutputPin_Construct(&TransformFilter_OutputPin_Vtbl, sizeof(BaseOutputPin), &piOutput, &tf_output_BaseOutputFuncTable, &pTransformFilter->filter.csFilter, &pTransformFilter->ppPins[1]);
 
        if (FAILED(hr))
            ERR("Cannot create output pin (%x)\n", hr);
        else {
            QualityControlImpl_Create( pTransformFilter->ppPins[0], &pTransformFilter->filter.IBaseFilter_iface, &pTransformFilter->qcimpl);
            pTransformFilter->qcimpl->IQualityControl_iface.lpVtbl = &TransformFilter_QualityControl_Vtbl;
        }
    }
 
    if (SUCCEEDED(hr))
    {
        ISeekingPassThru *passthru;
        pTransformFilter->seekthru_unk = NULL;
        hr = CoCreateInstance(&CLSID_SeekingPassThru, (IUnknown *)&pTransformFilter->filter.IBaseFilter_iface, CLSCTX_INPROC_SERVER,
                &IID_IUnknown, (void **)&pTransformFilter->seekthru_unk);
        if (SUCCEEDED(hr))
        {
            IUnknown_QueryInterface(pTransformFilter->seekthru_unk, &IID_ISeekingPassThru, (void**)&passthru);
            ISeekingPassThru_Init(passthru, FALSE, pTransformFilter->ppPins[0]);
            ISeekingPassThru_Release(passthru);
        }
    }
 
    if (FAILED(hr))
    {
        CoTaskMemFree(pTransformFilter->ppPins);
        BaseFilterImpl_Release(&pTransformFilter->filter.IBaseFilter_iface);
    }
 
    return hr;
}
 
HRESULT TransformFilter_Construct(const IBaseFilterVtbl *pVtbl, LONG filter_size, const CLSID* pClsid, const TransformFilterFuncTable* pFuncsTable, IBaseFilter ** ppTransformFilter)
{
    TransformFilter* pTf;
 
    *ppTransformFilter = NULL;
 
    assert(filter_size >= sizeof(TransformFilter));
 
    pTf = CoTaskMemAlloc(filter_size);
 
    if (!pTf)
        return E_OUTOFMEMORY;
 
    ZeroMemory(pTf, filter_size);
 
    if (SUCCEEDED(TransformFilter_Init(pVtbl, pClsid, pFuncsTable, pTf)))
    {
        *ppTransformFilter = &pTf->filter.IBaseFilter_iface;
        return S_OK;
    }
 
    CoTaskMemFree(pTf);
    return E_FAIL;
}
 
HRESULT WINAPI TransformFilterImpl_QueryInterface(IBaseFilter * iface, REFIID riid, LPVOID * ppv)
{
    HRESULT hr;
    TransformFilter *This = impl_from_IBaseFilter(iface);
    TRACE("(%p/%p)->(%s, %p)\n", This, iface, debugstr_guid(riid), ppv);
 
    if (IsEqualIID(riid, &IID_IQualityControl))  {
        *ppv = (IQualityControl*)This->qcimpl;
        IUnknown_AddRef((IUnknown*)*ppv);
        return S_OK;
    }
    else if (IsEqualIID(riid, &IID_IMediaSeeking) ||
             IsEqualIID(riid, &IID_IMediaPosition))
    {
        return IUnknown_QueryInterface(This->seekthru_unk, riid, ppv);
    }
    hr = BaseFilterImpl_QueryInterface(iface, riid, ppv);
 
    if (FAILED(hr) && !IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IVideoWindow) &&
        !IsEqualIID(riid, &IID_IAMFilterMiscFlags))
        FIXME("No interface for %s!\n", debugstr_guid(riid));
 
    return hr;
}
 
ULONG WINAPI TransformFilterImpl_Release(IBaseFilter * iface)
{
    TransformFilter *This = impl_from_IBaseFilter(iface);
    ULONG refCount = InterlockedDecrement(&This->filter.refCount);
 
    TRACE("(%p/%p)->() Release from %d\n", This, iface, refCount + 1);
 
    if (!refCount)
    {
        ULONG i;
 
        for (i = 0; i < This->npins; i++)
        {
            IPin *pConnectedTo;
 
            if (SUCCEEDED(IPin_ConnectedTo(This->ppPins[i], &pConnectedTo)))
            {
                IPin_Disconnect(pConnectedTo);
                IPin_Release(pConnectedTo);
            }
            IPin_Disconnect(This->ppPins[i]);
 
            IPin_Release(This->ppPins[i]);
        }
 
        CoTaskMemFree(This->ppPins);
 
        TRACE("Destroying transform filter\n");
        This->csReceive.DebugInfo->Spare[0] = 0;
        DeleteCriticalSection(&This->csReceive);
        FreeMediaType(&This->pmt);
        QualityControlImpl_Destroy(This->qcimpl);
        IUnknown_Release(This->seekthru_unk);
        BaseFilter_Destroy(&This->filter);
        CoTaskMemFree(This);
    }
    return refCount;
}
 
HRESULT WINAPI TransformFilterImpl_Stop(IBaseFilter * iface)
{
    TransformFilter *This = impl_from_IBaseFilter(iface);
    HRESULT hr = S_OK;
 
    TRACE("(%p/%p)\n", This, iface);
 
    EnterCriticalSection(&This->csReceive);
    {
        This->filter.state = State_Stopped;
        if (This->pFuncsTable->pfnStopStreaming)
            hr = This->pFuncsTable->pfnStopStreaming(This);
        if (SUCCEEDED(hr))
            hr = BaseOutputPinImpl_Inactive(impl_BaseOutputPin_from_IPin(This->ppPins[1]));
    }
    LeaveCriticalSection(&This->csReceive);
 
    return hr;
}
 
HRESULT WINAPI TransformFilterImpl_Pause(IBaseFilter * iface)
{
    TransformFilter *This = impl_from_IBaseFilter(iface);
    HRESULT hr;
 
    TRACE("(%p/%p)->()\n", This, iface);
 
    EnterCriticalSection(&This->csReceive);
    {
        if (This->filter.state == State_Stopped)
            hr = IBaseFilter_Run(iface, -1);
        else
            hr = S_OK;
 
        if (SUCCEEDED(hr))
            This->filter.state = State_Paused;
    }
    LeaveCriticalSection(&This->csReceive);
 
    return hr;
}
 
HRESULT WINAPI TransformFilterImpl_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
{
    HRESULT hr = S_OK;
    TransformFilter *This = impl_from_IBaseFilter(iface);
 
    TRACE("(%p/%p)->(%s)\n", This, iface, wine_dbgstr_longlong(tStart));
 
    EnterCriticalSection(&This->csReceive);
    {
        if (This->filter.state == State_Stopped)
        {
            impl_BaseInputPin_from_IPin(This->ppPins[0])->end_of_stream = FALSE;
            if (This->pFuncsTable->pfnStartStreaming)
                hr = This->pFuncsTable->pfnStartStreaming(This);
            if (SUCCEEDED(hr))
                hr = BaseOutputPinImpl_Active(impl_BaseOutputPin_from_IPin(This->ppPins[1]));
        }
 
        if (SUCCEEDED(hr))
        {
            This->filter.rtStreamStart = tStart;
            This->filter.state = State_Running;
        }
    }
    LeaveCriticalSection(&This->csReceive);
 
    return hr;
}
 
HRESULT WINAPI TransformFilterImpl_Notify(TransformFilter *iface, IBaseFilter *sender, Quality qm)
{
    return QualityControlImpl_Notify((IQualityControl*)iface->qcimpl, sender, qm);
}
 
HRESULT WINAPI TransformFilterImpl_FindPin(IBaseFilter * iface, LPCWSTR Id, IPin **ppPin)
{
    TransformFilter *This = impl_from_IBaseFilter(iface);
 
    TRACE("(%p/%p)->(%s,%p)\n", This, iface, debugstr_w(Id), ppPin);
 
    return E_NOTIMPL;
}
 
static HRESULT WINAPI TransformFilter_InputPin_EndOfStream(IPin * iface)
{
    BaseInputPin* This = impl_BaseInputPin_from_IPin(iface);
    TransformFilter* pTransform;
    IPin* ppin;
    HRESULT hr;
 
    TRACE("(%p)->()\n", iface);
 
    /* Since we process samples synchronously, just forward notification downstream */
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
    if (!pTransform)
        hr = E_FAIL;
    else
        hr = IPin_ConnectedTo(pTransform->ppPins[1], &ppin);
    if (SUCCEEDED(hr))
    {
        hr = IPin_EndOfStream(ppin);
        IPin_Release(ppin);
    }
 
    if (FAILED(hr))
        ERR("%x\n", hr);
    return hr;
}
 
static HRESULT WINAPI TransformFilter_InputPin_ReceiveConnection(IPin * iface, IPin * pReceivePin, const AM_MEDIA_TYPE * pmt)
{
    BaseInputPin* This = impl_BaseInputPin_from_IPin(iface);
    TransformFilter* pTransform;
    HRESULT hr = S_OK;
 
    TRACE("(%p)->(%p, %p)\n", iface, pReceivePin, pmt);
 
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
 
    if (pTransform->pFuncsTable->pfnSetMediaType)
        hr = pTransform->pFuncsTable->pfnSetMediaType(pTransform, PINDIR_INPUT, pmt);
 
    if (SUCCEEDED(hr) && pTransform->pFuncsTable->pfnCompleteConnect)
        hr = pTransform->pFuncsTable->pfnCompleteConnect(pTransform, PINDIR_INPUT, pReceivePin);
 
    if (SUCCEEDED(hr))
    {
        hr = BaseInputPinImpl_ReceiveConnection(iface, pReceivePin, pmt);
        if (FAILED(hr) && pTransform->pFuncsTable->pfnBreakConnect)
            pTransform->pFuncsTable->pfnBreakConnect(pTransform, PINDIR_INPUT);
    }
 
    return hr;
}
 
static HRESULT WINAPI TransformFilter_InputPin_Disconnect(IPin * iface)
{
    BaseInputPin* This = impl_BaseInputPin_from_IPin(iface);
    TransformFilter* pTransform;
 
    TRACE("(%p)->()\n", iface);
 
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
    if (pTransform->pFuncsTable->pfnBreakConnect)
        pTransform->pFuncsTable->pfnBreakConnect(pTransform, PINDIR_INPUT);
 
    return BasePinImpl_Disconnect(iface);
}
 
static HRESULT WINAPI TransformFilter_InputPin_BeginFlush(IPin * iface)
{
    BaseInputPin* This = impl_BaseInputPin_from_IPin(iface);
    TransformFilter* pTransform;
    HRESULT hr = S_OK;
 
    TRACE("(%p)->()\n", iface);
 
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
    EnterCriticalSection(&pTransform->filter.csFilter);
    if (pTransform->pFuncsTable->pfnBeginFlush)
        hr = pTransform->pFuncsTable->pfnBeginFlush(pTransform);
    if (SUCCEEDED(hr))
        hr = BaseInputPinImpl_BeginFlush(iface);
    LeaveCriticalSection(&pTransform->filter.csFilter);
    return hr;
}
 
static HRESULT WINAPI TransformFilter_InputPin_EndFlush(IPin * iface)
{
    BaseInputPin* This = impl_BaseInputPin_from_IPin(iface);
    TransformFilter* pTransform;
    HRESULT hr = S_OK;
 
    TRACE("(%p)->()\n", iface);
 
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
    EnterCriticalSection(&pTransform->filter.csFilter);
    if (pTransform->pFuncsTable->pfnEndFlush)
        hr = pTransform->pFuncsTable->pfnEndFlush(pTransform);
    if (SUCCEEDED(hr))
        hr = BaseInputPinImpl_EndFlush(iface);
    LeaveCriticalSection(&pTransform->filter.csFilter);
    return hr;
}
 
static HRESULT WINAPI TransformFilter_InputPin_NewSegment(IPin * iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
{
    BaseInputPin* This = impl_BaseInputPin_from_IPin(iface);
    TransformFilter* pTransform;
    HRESULT hr = S_OK;
 
    TRACE("(%p)->(%s %s %e)\n", iface, wine_dbgstr_longlong(tStart), wine_dbgstr_longlong(tStop), dRate);
 
    pTransform = impl_from_IBaseFilter(This->pin.pinInfo.pFilter);
    EnterCriticalSection(&pTransform->filter.csFilter);
    if (pTransform->pFuncsTable->pfnNewSegment)
        hr = pTransform->pFuncsTable->pfnNewSegment(pTransform, tStart, tStop, dRate);
    if (SUCCEEDED(hr))
        hr = BaseInputPinImpl_NewSegment(iface, tStart, tStop, dRate);
    LeaveCriticalSection(&pTransform->filter.csFilter);
    return hr;
}
 
static const IPinVtbl TransformFilter_InputPin_Vtbl =
{
    BaseInputPinImpl_QueryInterface,
    BasePinImpl_AddRef,
    BaseInputPinImpl_Release,
    BaseInputPinImpl_Connect,
    TransformFilter_InputPin_ReceiveConnection,
    TransformFilter_InputPin_Disconnect,
    BasePinImpl_ConnectedTo,
    BasePinImpl_ConnectionMediaType,
    BasePinImpl_QueryPinInfo,
    BasePinImpl_QueryDirection,
    BasePinImpl_QueryId,
    BaseInputPinImpl_QueryAccept,
    BasePinImpl_EnumMediaTypes,
    BasePinImpl_QueryInternalConnections,
    TransformFilter_InputPin_EndOfStream,
    TransformFilter_InputPin_BeginFlush,
    TransformFilter_InputPin_EndFlush,
    TransformFilter_InputPin_NewSegment
};
 
static const IPinVtbl TransformFilter_OutputPin_Vtbl =
{
    BaseOutputPinImpl_QueryInterface,
    BasePinImpl_AddRef,
    BaseOutputPinImpl_Release,
    BaseOutputPinImpl_Connect,
    BaseOutputPinImpl_ReceiveConnection,
    BaseOutputPinImpl_Disconnect,
    BasePinImpl_ConnectedTo,
    BasePinImpl_ConnectionMediaType,
    BasePinImpl_QueryPinInfo,
    BasePinImpl_QueryDirection,
    BasePinImpl_QueryId,
    TransformFilter_Output_QueryAccept,
    BasePinImpl_EnumMediaTypes,
    BasePinImpl_QueryInternalConnections,
    BaseOutputPinImpl_EndOfStream,
    BaseOutputPinImpl_BeginFlush,
    BaseOutputPinImpl_EndFlush,
    BasePinImpl_NewSegment
};
 
static HRESULT WINAPI TransformFilter_QualityControlImpl_Notify(IQualityControl *iface, IBaseFilter *sender, Quality qm) {
    QualityControlImpl *qc = (QualityControlImpl*)iface;
    TransformFilter *This = impl_from_IBaseFilter(qc->self);
 
    if (This->pFuncsTable->pfnNotify)
        return This->pFuncsTable->pfnNotify(This, sender, qm);
    else
        return TransformFilterImpl_Notify(This, sender, qm);
}
 
static const IQualityControlVtbl TransformFilter_QualityControl_Vtbl = {
    QualityControlImpl_QueryInterface,
    QualityControlImpl_AddRef,
    QualityControlImpl_Release,
    TransformFilter_QualityControlImpl_Notify,
    QualityControlImpl_SetSink
};