/*  This file is part of the KDE project.+
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Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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+
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This library is free software: you can redistribute it and/or modify+
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it under the terms of the GNU Lesser General Public License as published by+
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the Free Software Foundation, either version 2.1 or 3 of the License.+
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+
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This library is distributed in the hope that it will be useful,+
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but WITHOUT ANY WARRANTY; without even the implied warranty of+
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the+
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GNU Lesser General Public License for more details.+
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+
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You should have received a copy of the GNU Lesser General Public License+
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along with this library.  If not, see <http://www.gnu.org/licenses/>.+
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*/+
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+
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#include "backendnode.h"+
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#include "mediaobject.h"+
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+
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#include <ocidl.h> // ISpecifyPropertyPages+
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#include <olectl.h> // OleCreatePropertyFrame+
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+
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QT_BEGIN_NAMESPACE+
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+
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namespace Phonon+
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{+
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    namespace DS9+
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    {+
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        // Displays a property dialog for a filter (experimental but should be put into main+
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        /*static void showPropertyDialog(const Filter &filter)+
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        {+
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            ComPointer<ISpecifyPropertyPages> prop(filter, IID_ISpecifyPropertyPages);+
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            if (prop != 0) {+
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                IUnknown *iunk[] = {filter};+
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                // Show the page.+
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                CAUUID caGUID;+
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                prop->GetPages(&caGUID);+
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                OleCreatePropertyFrame(+
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                    0, // Parent window+
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                    0, 0,                   // (Reserved)+
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                    0,                      // Caption for the dialog box+
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                    1,                      // Number of objects (just the filter)+
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                    iunk,                  // Array of object pointers.+
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                    caGUID.cElems,          // Number of property pages+
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                    caGUID.pElems,          // Array of property page CLSIDs+
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                    0,                      // Locale identifier+
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                    0, 0                    // Reserved+
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                    );+
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            }+
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        }*/+
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+
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        //for now we have 2 graphs that do the same+
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        BackendNode::BackendNode(QObject *parent) : QObject(parent), m_mediaObject(0)+
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        {+
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        }+
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+
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        BackendNode::~BackendNode()+
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        {+
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            //this will remove the filter from the graph+
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            FILTER_INFO info;+
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            for(int i = 0; i < FILTER_COUNT; ++i) {+
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                const Filter &filter = m_filters[i];+
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                if (!filter)+
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                    continue;+
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                filter->QueryFilterInfo(&info);+
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                if (info.pGraph) {+
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                    HRESULT hr = info.pGraph->RemoveFilter(filter);+
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+
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                    if (hr == VFW_E_NOT_STOPPED && m_mediaObject) {+
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                        m_mediaObject->ensureStopped();+
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+
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                        hr = info.pGraph->RemoveFilter(filter);+
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                    }+
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                    Q_ASSERT(SUCCEEDED(hr));+
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                    info.pGraph->Release();+
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                }+
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            }+
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        }+
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+
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        void BackendNode::setMediaObject(MediaObject *mo)+
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        {+
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            if (m_mediaObject) {+
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                disconnect(m_mediaObject, SIGNAL(destroyed()), this, SLOT(mediaObjectDestroyed()));+
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            }+
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            m_mediaObject = mo;+
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            connect(mo, SIGNAL(destroyed()), SLOT(mediaObjectDestroyed()));+
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        }+
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+
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        void BackendNode::mediaObjectDestroyed()+
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        {+
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            //remove the filter from its graph+
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            FILTER_INFO info;+
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            for(int i = 0; i < FILTER_COUNT; ++i) {+
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                const Filter &filter = m_filters[i];+
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                if (!filter)+
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                    continue; +
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                filter->QueryFilterInfo(&info);+
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                if (info.pGraph) {+
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                    HRESULT hr = info.pGraph->RemoveFilter(filter);+
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                    Q_ASSERT(SUCCEEDED(hr));+
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                    Q_UNUSED(hr);+
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                    info.pGraph->Release();+
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                }+
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            }+
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            m_mediaObject = 0;+
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        }+
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+
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        QList<InputPin> BackendNode::pins(const Filter &filter, PIN_DIRECTION wantedDirection)+
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        {+
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            QList<InputPin> ret;+
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            if (filter) {+
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                ComPointer<IEnumPins> enumPin;+
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                HRESULT hr = filter->EnumPins(enumPin.pparam());+
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                Q_UNUSED(hr);+
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                Q_ASSERT( SUCCEEDED(hr));+
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                InputPin pin;+
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                while (enumPin->Next(1, pin.pparam(), 0) == S_OK) {+
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                    PIN_DIRECTION dir;+
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                    hr = pin->QueryDirection(&dir);+
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                    Q_ASSERT( SUCCEEDED(hr));+
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                    if (dir == wantedDirection) {+
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                        ret.append(pin);+
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                    }+
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                }+
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            }+
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            return ret;+
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        }+
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    }+
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}+
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+
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QT_END_NAMESPACE+
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+
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#include "moc_backendnode.cpp"+
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