/*  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/>.

*/

#ifndef Phonon_QT7_AUDIOGRAPH_H

#define Phonon_QT7_AUDIOGRAPH_H

#include <AudioToolbox/AudioToolbox.h>

#include <AudioUnit/AudioUnit.h>

#include <QtCore/qnamespace.h>

#include "audioconnection.h"

#include "medianode.h"

QT_BEGIN_NAMESPACE

namespace Phonon

{

namespace QT7

{

    class AudioGraph : public MediaNode

    {

        public:

            AudioGraph(MediaNode *root);

            virtual ~AudioGraph();

            AUGraph audioGraphRef();

            void startAllOverFromScratch();

            bool openAndInit();

            void start();

            void tryStartGraph();

            void stop();

            void prepare();

            void rebuildGraph();

            void update();

            bool isRunning();

            void setPaused(bool pause);

            bool graphCannotPlay();

            void rebuildGraphIfNeeded();

            void updateStreamSpecifications();

            void setStatusCannotPlay();

            MediaNode *root();

            void notify(const MediaNodeEvent *event, bool propagate = true);

        private:

            friend class MediaNode;

            friend class AudioNode;

            void deleteGraph();

            bool updateStreamSpecificationRecursive(AudioConnection *connection);

            void createAndConnectAuNodesRecursive(AudioConnection *connection);

            bool createAudioUnitsRecursive(AudioConnection *connection);

            void connectLate(AudioConnection *connection);

            void disconnectLate(AudioConnection *connection);

            int nodeCount();

            bool m_initialized;

            bool m_startedLogically;

            bool m_rebuildLater;

            bool m_graphCannotPlay;

            bool m_paused;

            AUGraph m_audioGraphRef;

            MediaNode *m_root;

    };

}} // namespace Phonon::QT7

QT_END_NAMESPACE

#endif // Phonon_QT7_AUDIOGRAPH_H