/*  This file is part of the KDE project.

Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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 or 3 of the License.

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, see <http://www.gnu.org/licenses/>.

*/

#include "backendnode.h"

#include "mediaobject.h"

#include <ocidl.h> // ISpecifyPropertyPages

#include <olectl.h> // OleCreatePropertyFrame

QT_BEGIN_NAMESPACE

namespace Phonon

{

    namespace DS9

    {

        // Displays a property dialog for a filter (experimental but should be put into main

        /*static void showPropertyDialog(const Filter &filter)

        {

            ComPointer<ISpecifyPropertyPages> prop(filter, IID_ISpecifyPropertyPages);

            if (prop != 0) {

                IUnknown *iunk[] = {filter};

                // Show the page.

                CAUUID caGUID;

                prop->GetPages(&caGUID);

                OleCreatePropertyFrame(

                    0, // Parent window

                    0, 0,                   // (Reserved)

                    0,                      // Caption for the dialog box

                    1,                      // Number of objects (just the filter)

                    iunk,                  // Array of object pointers.

                    caGUID.cElems,          // Number of property pages

                    caGUID.pElems,          // Array of property page CLSIDs

                    0,                      // Locale identifier

                    0, 0                    // Reserved

                    );

            }

        }*/

        //for now we have 2 graphs that do the same

        BackendNode::BackendNode(QObject *parent) : QObject(parent), m_mediaObject(0)

        {

        }

        BackendNode::~BackendNode()

        {

            //this will remove the filter from the graph

            FILTER_INFO info;

            for(int i = 0; i < FILTER_COUNT; ++i) {

                const Filter &filter = m_filters[i];

                if (!filter)

                    continue;

                filter->QueryFilterInfo(&info);

                if (info.pGraph) {

                    HRESULT hr = info.pGraph->RemoveFilter(filter);

                    if (hr == VFW_E_NOT_STOPPED && m_mediaObject) {

                        m_mediaObject->ensureStopped();

                        hr = info.pGraph->RemoveFilter(filter);

                    }

                    Q_ASSERT(SUCCEEDED(hr));

                    info.pGraph->Release();

                }

            }

        }

        void BackendNode::setMediaObject(MediaObject *mo)

        {

            if (m_mediaObject) {

                disconnect(m_mediaObject, SIGNAL(destroyed()), this, SLOT(mediaObjectDestroyed()));

            }

            m_mediaObject = mo;

            connect(mo, SIGNAL(destroyed()), SLOT(mediaObjectDestroyed()));

        }

        void BackendNode::mediaObjectDestroyed()

        {

            //remove the filter from its graph

            FILTER_INFO info;

            for(int i = 0; i < FILTER_COUNT; ++i) {

                const Filter &filter = m_filters[i];

                if (!filter)

                    continue; 

                filter->QueryFilterInfo(&info);

                if (info.pGraph) {

                    HRESULT hr = info.pGraph->RemoveFilter(filter);

                    Q_ASSERT(SUCCEEDED(hr));

                    Q_UNUSED(hr);

                    info.pGraph->Release();

                }

            }

            m_mediaObject = 0;

        }

        QList<InputPin> BackendNode::pins(const Filter &filter, PIN_DIRECTION wantedDirection)

        {

            QList<InputPin> ret;

            if (filter) {

                ComPointer<IEnumPins> enumPin;

                HRESULT hr = filter->EnumPins(enumPin.pparam());

                Q_UNUSED(hr);

                Q_ASSERT( SUCCEEDED(hr));

                InputPin pin;

                while (enumPin->Next(1, pin.pparam(), 0) == S_OK) {

                    PIN_DIRECTION dir;

                    hr = pin->QueryDirection(&dir);

                    Q_ASSERT( SUCCEEDED(hr));

                    if (dir == wantedDirection) {

                        ret.append(pin);

                    }

                }

            }

            return ret;

        }

    }

}

QT_END_NAMESPACE

#include "moc_backendnode.cpp"