C++ IPin_Release函数代码示例

/*
 * Input Pin
 */
static HRESULT QT_RemoveOutputPins(QTSplitter *This)
{
    HRESULT hr;
    TRACE("(%p)\n", This);

    if (This->pVideo_Pin)
    {
        OutputQueue_Destroy(This->pVideo_Pin->queue);
        hr = BaseOutputPinImpl_BreakConnect(&This->pVideo_Pin->pin);
        TRACE("Disconnect: %08x\n", hr);
        IPin_Release(&This->pVideo_Pin->pin.pin.IPin_iface);
        This->pVideo_Pin = NULL;
    }
    if (This->pAudio_Pin)
    {
        OutputQueue_Destroy(This->pAudio_Pin->queue);
        hr = BaseOutputPinImpl_BreakConnect(&This->pAudio_Pin->pin);
        TRACE("Disconnect: %08x\n", hr);
        IPin_Release(&This->pAudio_Pin->pin.pin.IPin_iface);
        This->pAudio_Pin = NULL;
    }

    BaseFilterImpl_IncrementPinVersion(&This->filter);
    return S_OK;
}

static ULONG WINAPI NullRendererInner_Release(IUnknown * iface)
{
    ICOM_THIS_MULTI(NullRendererImpl, IInner_vtbl, iface);
    ULONG refCount = InterlockedDecrement(&This->refCount);

    TRACE("(%p/%p)->() Release from %d\n", This, iface, refCount + 1);

    if (!refCount)
    {
        IPin *pConnectedTo;

        if (This->pClock)
            IReferenceClock_Release(This->pClock);

        if (SUCCEEDED(IPin_ConnectedTo((IPin *)This->pInputPin, &pConnectedTo)))
        {
            IPin_Disconnect(pConnectedTo);
            IPin_Release(pConnectedTo);
        }
        IPin_Disconnect((IPin *)This->pInputPin);
        IPin_Release((IPin *)This->pInputPin);

        This->lpVtbl = NULL;

        This->csFilter.DebugInfo->Spare[0] = 0;
        DeleteCriticalSection(&This->csFilter);

        TRACE("Destroying Null Renderer\n");
        CoTaskMemFree(This);
        return 0;
    }
    else
        return refCount;
}

void Parser_Destroy(ParserImpl *This)
{
    IPin *connected = NULL;
    ULONG pinref;

    assert(!This->filter.refCount);
    PullPin_WaitForStateChange(This->pInputPin, INFINITE);

    /* Don't need to clean up output pins, freeing input pin will do that */
    IPin_ConnectedTo(&This->pInputPin->pin.IPin_iface, &connected);
    if (connected)
    {
        assert(IPin_Disconnect(connected) == S_OK);
        IPin_Release(connected);
        assert(IPin_Disconnect(&This->pInputPin->pin.IPin_iface) == S_OK);
    }
    pinref = IPin_Release(&This->pInputPin->pin.IPin_iface);
    if (pinref)
    {
        /* Valgrind could find this, if I kill it here */
        ERR("pinref should be null, is %u, destroying anyway\n", pinref);
        assert((LONG)pinref > 0);

        while (pinref)
            pinref = IPin_Release(&This->pInputPin->pin.IPin_iface);
    }

    CoTaskMemFree(This->ppPins);

    TRACE("Destroying parser\n");
    CoTaskMemFree(This);
}

static ULONG WINAPI unknown_inner_Release(IUnknown *iface)
{
    VfwCapture *This = impl_from_IUnknown(iface);
    ULONG ref = InterlockedDecrement(&This->filter.refCount);

    TRACE("(%p) ref=%d\n", This, ref);

    if (!ref)
    {
        IPin *conn = NULL;

        TRACE("destroying everything\n");
        if (This->init)
        {
            if (This->filter.state != State_Stopped)
                qcap_driver_stop(This->driver_info, &This->filter.state);
            qcap_driver_destroy(This->driver_info);
        }
        IPin_ConnectedTo(This->pOutputPin, &conn);
        if (conn)
        {
            IPin_Disconnect(conn);
            IPin_Disconnect(This->pOutputPin);
            IPin_Release(conn);
        }
        IPin_Release(This->pOutputPin);
        BaseFilter_Destroy(&This->filter);
        CoTaskMemFree(This);
        ObjectRefCount(FALSE);
    }

    return ref;
}

static void test_AviCo(void)
{
    IPersistPropertyBag *persist_bag;
    IPin *pin, *in_pin, *out_pin;
    IEnumPins *enum_pins;
    IBaseFilter *avico;
    PIN_INFO pin_info;
    HRESULT hres;

    static const WCHAR inputW[] = {'I','n','p','u','t',0};
    static const WCHAR outputW[] = {'O','u','t','p','u','t',0};

    hres = CoCreateInstance(&CLSID_AVICo, NULL, CLSCTX_INPROC_SERVER, &IID_IBaseFilter, (void**)&avico);
    if(hres == REGDB_E_CLASSNOTREG) {
        win_skip("CLSID_AVICo not restered\n");
        return;
    }
    ok(hres == S_OK, "Could not create CLSID_AVICo class: %08x\n", hres);

    hres = IBaseFilter_QueryInterface(avico, &IID_IPin, (void**)&pin);
    ok(hres == E_NOINTERFACE, "QueryInterface(IID_IPin) returned: %08x\n", hres);

    hres = IBaseFilter_QueryInterface(avico, &IID_IPersistPropertyBag, (void**)&persist_bag);
    ok(hres == S_OK, "QueryInterface(IID_IPersistPropertyBag) returned: %08x\n", hres);

    SET_EXPECT(Read_FccHandler);
    hres = IPersistPropertyBag_Load(persist_bag, &PropertyBag, NULL);
    ok(hres == S_OK, "Load failed: %08x\n", hres);
    CHECK_CALLED(Read_FccHandler);

    IPersistPropertyBag_Release(persist_bag);

    hres = IBaseFilter_EnumPins(avico, &enum_pins);
    ok(hres == S_OK, "EnumPins failed: %08x\n", hres);

    hres = IEnumPins_Next(enum_pins, 1, &in_pin, NULL);
    ok(hres == S_OK, "Next failed: %08x\n", hres);

    hres = IPin_QueryPinInfo(in_pin, &pin_info);
    ok(hres == S_OK, "QueryPinInfo failed: %08x\n", hres);
    ok(pin_info.pFilter == avico, "pin_info.pFilter != avico\n");
    ok(pin_info.dir == PINDIR_INPUT, "pin_info.dir = %d\n", pin_info.dir);
    ok(!lstrcmpW(pin_info.achName, inputW), "pin_info.achName = %s\n", wine_dbgstr_w(pin_info.achName));

    hres = IEnumPins_Next(enum_pins, 1, &out_pin, NULL);
    ok(hres == S_OK, "Next failed: %08x\n", hres);

    hres = IPin_QueryPinInfo(out_pin, &pin_info);
    ok(hres == S_OK, "QueryPinInfo failed: %08x\n", hres);
    ok(pin_info.pFilter == avico, "pin_info.pFilter != avico\n");
    ok(pin_info.dir == PINDIR_OUTPUT, "pin_info.dir = %d\n", pin_info.dir);
    ok(!lstrcmpW(pin_info.achName, outputW), "pin_info.achName = %s\n", wine_dbgstr_w(pin_info.achName));

    IEnumPins_Release(enum_pins);

    IPin_Release(in_pin);
    IPin_Release(out_pin);
    IBaseFilter_Release(avico);
}

static void QT_Destroy(QTSplitter *This)
{
    IPin *connected = NULL;
    ULONG pinref;

    TRACE("Destroying\n");

    EnterCriticalSection(&This->csReceive);
    /* Don't need to clean up output pins, disconnecting input pin will do that */
    IPin_ConnectedTo(&This->pInputPin.pin.IPin_iface, &connected);
    if (connected)
    {
        IPin_Disconnect(connected);
        IPin_Release(connected);
    }
    pinref = IPin_Release(&This->pInputPin.pin.IPin_iface);
    if (pinref)
    {
        ERR("pinref should be null, is %u, destroying anyway\n", pinref);
        assert((LONG)pinref > 0);

        while (pinref)
            pinref = IPin_Release(&This->pInputPin.pin.IPin_iface);
    }

    if (This->pQTMovie)
    {
        DisposeMovie(This->pQTMovie);
        This->pQTMovie = NULL;
    }
    if (This->vContext)
        QTVisualContextRelease(This->vContext);
    if (This->aSession)
        MovieAudioExtractionEnd(This->aSession);

    ExitMoviesOnThread();
    LeaveCriticalSection(&This->csReceive);

    if (This->loaderThread)
    {
        WaitForSingleObject(This->loaderThread, INFINITE);
        CloseHandle(This->loaderThread);
    }
    if (This->splitterThread)
    {
        SetEvent(This->runEvent);
        WaitForSingleObject(This->splitterThread, INFINITE);
        CloseHandle(This->splitterThread);
    }

    CloseHandle(This->runEvent);

    This->csReceive.DebugInfo->Spare[0] = 0;
    DeleteCriticalSection(&This->csReceive);
    BaseFilter_Destroy(&This->filter);

    CoTaskMemFree(This);
}

HRESULT WINAPI QualityControlImpl_Notify(IQualityControl *iface, IBaseFilter *sender, Quality qm)
{
    QualityControlImpl *This = impl_from_IQualityControl(iface);
    HRESULT hr = S_FALSE;

    TRACE("%p %p { 0x%x %u " XTIME_FMT " " XTIME_FMT " }\n",
            This, sender, qm.Type, qm.Proportion,
            XTIME(qm.Late), XTIME(qm.TimeStamp));

    if (This->tonotify)
        return IQualityControl_Notify(This->tonotify, This->self, qm);

    if (This->input) {
        IPin *to = NULL;
        IPin_ConnectedTo(This->input, &to);
        if (to) {
            IQualityControl *qc = NULL;
            IPin_QueryInterface(to, &IID_IQualityControl, (void**)&qc);
            if (qc) {
                hr = IQualityControl_Notify(qc, This->self, qm);
                IQualityControl_Release(qc);
            }
            IPin_Release(to);
        }
    }

    return hr;
}

static ULONG WINAPI IAMMultiMediaStreamImpl_Release(IAMMultiMediaStream* iface)
{
    IAMMultiMediaStreamImpl *This = impl_from_IAMMultiMediaStream(iface);
    ULONG ref = InterlockedDecrement(&This->ref);
    ULONG i;

    TRACE("(%p/%p)\n", iface, This);

    if (!ref)
    {
        for(i = 0; i < This->nbStreams; i++)
            IMediaStream_Release(This->pStreams[i]);
        if (This->ipin)
            IPin_Release(This->ipin);
        if (This->media_stream_filter)
            IBaseFilter_Release(This->media_stream_filter);
        if (This->media_seeking)
            IMediaSeeking_Release(This->media_seeking);
        if (This->media_control)
            IMediaControl_Release(This->media_control);
        if (This->pFilterGraph)
            IGraphBuilder_Release(This->pFilterGraph);
        HeapFree(GetProcessHeap(), 0, This);
    }

    return ref;
}

static BOOL pin_matches(IPin *pin, PIN_DIRECTION direction, const GUID *cat, const GUID *type, BOOL unconnected)
{
    IPin *partner;
    PIN_DIRECTION pindir;

    IPin_QueryDirection(pin, &pindir);
    if (pindir != direction)
    {
        TRACE("No match, wrong direction\n");
        return FALSE;
    }

    if (unconnected && IPin_ConnectedTo(pin, &partner) == S_OK)
    {
        IPin_Release(partner);
        TRACE("No match, %p already connected to %p\n", pin, partner);
        return FALSE;
    }

    if (cat || type)
        FIXME("Ignoring category/type\n");

    TRACE("Match made in heaven\n");

    return TRUE;
}

static HRESULT Parser_RemoveOutputPins(ParserImpl * This)
{
    /* NOTE: should be in critical section when calling this function */
    HRESULT hr;
    ULONG i;
    IPin ** ppOldPins = This->ppPins;

    TRACE("(%p)\n", This);

    /* reduce the pin array down to 1 (just our input pin) */
    This->ppPins = CoTaskMemAlloc(sizeof(IPin *) * 1);
    memcpy(This->ppPins, ppOldPins, sizeof(IPin *) * 1);

    for (i = 0; i < This->cStreams; i++)
    {
        hr = ((BaseOutputPin *)ppOldPins[i + 1])->pFuncsTable->pfnBreakConnect((BaseOutputPin *)ppOldPins[i + 1]);
        TRACE("Disconnect: %08x\n", hr);
        IPin_Release(ppOldPins[i + 1]);
    }

    BaseFilterImpl_IncrementPinVersion(&This->filter);
    This->cStreams = 0;
    CoTaskMemFree(ppOldPins);

    return S_OK;
}

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 ULONG WINAPI TransformFilter_Release(IBaseFilter * iface)
{
    TransformFilterImpl *This = (TransformFilterImpl *)iface;
    ULONG refCount = InterlockedDecrement(&This->refCount);

    TRACE("(%p/%p)->() Release from %d\n", This, iface, refCount + 1);

    if (!refCount)
    {
        ULONG i;

        if (This->pClock)
            IReferenceClock_Release(This->pClock);

        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);
        This->lpVtbl = NULL;

        This->csFilter.DebugInfo->Spare[0] = 0;
        DeleteCriticalSection(&This->csFilter);

        TRACE("Destroying transform filter\n");
        FreeMediaType(&This->pmt);
        CoTaskMemFree(This);

        return 0;
    }
    else
        return refCount;
}

static ULONG WINAPI DSoundRender_Release(IBaseFilter * iface)
{
    DSoundRenderImpl *This = (DSoundRenderImpl *)iface;
    ULONG refCount = BaseFilterImpl_Release(iface);

    TRACE("(%p)->() Release from %d\n", This, refCount + 1);

    if (!refCount)
    {
        IPin *pConnectedTo;

        if (This->dsbuffer)
            IDirectSoundBuffer_Release(This->dsbuffer);
        This->dsbuffer = NULL;
        if (This->dsound)
            IDirectSound_Release(This->dsound);
        This->dsound = NULL;
       
        if (SUCCEEDED(IPin_ConnectedTo((IPin *)This->pInputPin, &pConnectedTo)))
        {
            IPin_Disconnect(pConnectedTo);
            IPin_Release(pConnectedTo);
        }
        IPin_Disconnect((IPin *)This->pInputPin);

        IPin_Release((IPin *)This->pInputPin);

        This->IBasicAudio_vtbl = NULL;
        if (This->seekthru_unk)
            IUnknown_Release(This->seekthru_unk);

        CloseHandle(This->state_change);
        CloseHandle(This->blocked);

        TRACE("Destroying Audio Renderer\n");
        CoTaskMemFree(This);
        
        return 0;
    }
    else
        return refCount;
}

static HRESULT WINAPI
fnCaptureGraphBuilder2_RenderStream(ICaptureGraphBuilder2 * iface,
                                    const GUID *pCategory,
                                    const GUID *pType,
                                    IUnknown *pSource,
                                    IBaseFilter *pfCompressor,
                                    IBaseFilter *pfRenderer)
{
    CaptureGraphImpl *This = impl_from_ICaptureGraphBuilder2(iface);
    IPin *pin_in = NULL;
    IPin *pin_out = NULL;
    HRESULT hr;

    FIXME("(%p/%p)->(%s, %s, %p, %p, %p) Stub!\n", This, iface,
          debugstr_guid(pCategory), debugstr_guid(pType),
          pSource, pfCompressor, pfRenderer);

    if (pfCompressor)
        FIXME("Intermediate streams not supported yet\n");

    if (!This->mygraph)
    {
        FIXME("Need a capture graph\n");
        return E_UNEXPECTED;
    }

    ICaptureGraphBuilder2_FindPin(iface, pSource, PINDIR_OUTPUT, pCategory, pType, TRUE, 0, &pin_in);
    if (!pin_in)
        return E_FAIL;
    ICaptureGraphBuilder2_FindPin(iface, (IUnknown*)pfRenderer, PINDIR_INPUT, pCategory, pType, TRUE, 0, &pin_out);
    if (!pin_out)
    {
        IPin_Release(pin_in);
        return E_FAIL;
    }

    /* Uses 'Intelligent Connect', so Connect, not ConnectDirect here */
    hr = IGraphBuilder_Connect(This->mygraph, pin_in, pin_out);
    IPin_Release(pin_in);
    IPin_Release(pin_out);
    return hr;
}

HRESULT qcap_driver_stop(Capture *capBox, FILTER_STATE *state)
{
    TRACE("%p -> (%p)\n", capBox, state);

    if (*state == State_Stopped)
        return S_OK;

    EnterCriticalSection(&capBox->CritSect);

    if (capBox->thread)
    {
        if (*state == State_Paused)
            ResumeThread(capBox->thread);
        capBox->stopped = 1;
        capBox->thread = 0;
        if (capBox->iscommitted)
        {
            IMemInputPin *pMem = NULL;
            IMemAllocator * pAlloc = NULL;
            IPin *pConnect = NULL;
            HRESULT hr;

            capBox->iscommitted = 0;

            hr = IPin_ConnectedTo(capBox->pOut, &pConnect);

            if (SUCCEEDED(hr))
                hr = IPin_QueryInterface(pConnect, &IID_IMemInputPin, (void **) &pMem);

            if (SUCCEEDED(hr))
                hr = IMemInputPin_GetAllocator(pMem, &pAlloc);

            if (SUCCEEDED(hr))
                hr = IMemAllocator_Decommit(pAlloc);

            if (pAlloc)
                IMemAllocator_Release(pAlloc);

            if (pMem)
                IMemInputPin_Release(pMem);

            if (pConnect)
                IPin_Release(pConnect);

            if (hr != S_OK && hr != VFW_E_NOT_COMMITTED)
                WARN("Decommitting allocator: %x\n", hr);
        }
        V4l_Unprepare(capBox);
    }

    *state = State_Stopped;
    LeaveCriticalSection(&capBox->CritSect);
    return S_OK;
}