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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * 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
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSG_IMAGESTREAM
#define OSG_IMAGESTREAM 1

#include <osg/Image>
#include <osg/AudioStream>

namespace osg {

// forward declare of osg::Texture
class Texture;

/**
  * Image Stream class.
*/
class OSG_EXPORT ImageStream : public Image
{
    public:
        ImageStream();

        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
        ImageStream(const ImageStream& image,const CopyOp& copyop=CopyOp::SHALLOW_COPY);

        virtual Object* cloneType() const { return new ImageStream(); }
        virtual Object* clone(const CopyOp& copyop) const { return new ImageStream(*this,copyop); }
        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const ImageStream*>(obj)!=0; }
        virtual const char* libraryName() const { return "osg"; }
        virtual const char* className() const { return "ImageStream"; }

        /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
        virtual int compare(const Image& rhs) const;

        enum StreamStatus
        {
            INVALID,
            PLAYING,
            PAUSED,
            REWINDING
        };

        virtual void seek(double /*time*/) {}

        virtual void play() { _status=PLAYING; }

        virtual void pause() { _status=PAUSED; }

        virtual void rewind() { _status=REWINDING; }

        virtual void quit(bool /*waitForThreadToExit*/ = true) {}

        StreamStatus getStatus() const { return _status; }


        enum LoopingMode
        {
            NO_LOOPING,
            LOOPING
        };

        void setLoopingMode(LoopingMode mode)
        {
            if (_loopingMode == mode) return;

            _loopingMode = mode;
            applyLoopingMode();
        }

        LoopingMode getLoopingMode() const { return _loopingMode; }

        virtual double getCreationTime() const { return HUGE_VAL; }
        virtual double getLength() const { return 0.0; }
        virtual double getFrameRate() const { return 0.0; }
        virtual double getCurrentTime() const { return 0.0; }

        virtual void setReferenceTime(double) {}
        virtual double getReferenceTime() const { return 0.0; }

        virtual void setTimeMultiplier(double) {}
        virtual double getTimeMultiplier() const { return 0.0; }

        virtual void setVolume(float) {}
        virtual float getVolume() const { return 0.0f; }

        /// set the balance of the audio: -1 = left, 0 = center,  1 = right
        virtual float getAudioBalance() { return 0.0f; }
        virtual void setAudioBalance(float /*b*/) {}

        typedef std::vector< osg::ref_ptr<osg::AudioStream> > AudioStreams;
        void setAudioStreams(const AudioStreams& asl) { _audioStreams = asl; }
        AudioStreams& getAudioStreams() { return _audioStreams; }
        const AudioStreams& getAudioStreams() const { return _audioStreams; }

        /** create a suitable texture for this imagestream, return NULL, if not supported
         *  implement this method in subclasses to use special technologies like CoreVideo
         *  or similar.
         */
        virtual osg::Texture* createSuitableTexture() { return NULL; }

    protected:
        virtual void applyLoopingMode() {}

        virtual ~ImageStream() {}

        StreamStatus    _status;
        LoopingMode     _loopingMode;

        AudioStreams    _audioStreams;
};

} // namespace

#endif