IIOImage.h

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/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
 
#ifndef META_OCEAN_MEDIA_IMAGEIO_IIO_IMAGE_H
#define META_OCEAN_MEDIA_IMAGEIO_IIO_IMAGE_H
 
#include "ocean/media/imageio/ImageIO.h"
#include "ocean/media/imageio/IIOObject.h"
 
#include "ocean/media/Image.h"
 
namespace Ocean
{
 
namespace Media
{
 
namespace ImageIO
{
 
/**
 * This class implements an image class for ImageIO.
 * @ingroup mediaiio
 */
class OCEAN_MEDIA_IIO_EXPORT IIOImage :
    virtual public IIOObject,
    virtual public Image
{
    friend class IIOLibrary;
 
    public:
 
        /**
         * Returns whether the medium is started currently.
         * @see Medium::isStarted().
         */
        bool isStarted() const override;
 
        /**
         * Returns the start timestamp.
         * @see FiniteMedium::startTimestamp().
         */
        Timestamp startTimestamp() const override;
 
        /**
         * Returns the pause timestamp.
         * @see FiniteMedium::pauseTimestamp().
         */
        Timestamp pauseTimestamp() const override;
 
        /**
         * Returns the stop timestamp.
         * @see FiniteMedium::stopTimestamp().
         */
        Timestamp stopTimestamp() const override;
 
        /**
         * Clones this medium and returns a new independent instance of this medium.
         * @see Medium::clone().
         */
        MediumRef clone() const override;
 
    protected:
 
        /**
         * Creates a new medium by a given url.
         * @param url Url of the medium
         */
        explicit IIOImage(const std::string& url);
 
        /**
         * Destructs an image object.
         */
        ~IIOImage() override;
 
        /**
         * Starts the medium.
         * @see Medium::start().
         */
        bool start() override;
 
        /**
         * Pauses the medium.
         * @see Medium::pause():
         */
        bool pause() override;
 
        /**
         * Stops the medium.
         * @see Medium::stop().
         */
        bool stop() override;
 
        /**
         * Sets the preferred frame pixel format.
         * @see FrameMedium::setPreferredFramePixelFormat().
         */
        bool setPreferredFramePixelFormat(const FrameType::PixelFormat format) override;
 
    protected:
 
        /**
         * (Re-)loads the image.
         * @return True, if succeeded
         */
        bool loadImage();
 
        /**
         * Releases the image.
         */
        void release();
 
    protected:
 
        /// Recent frame type.
        FrameType recentFrameType_;
 
        /// Start timestamp.
        Timestamp startTimestamp_;
 
        /// Pause timestamp.
        Timestamp pauseTimestamp_;
 
        /// Stop timestamp.
        Timestamp stopTimestamp_;
 
        /// Determining whether this image is 'started' and holds valid image data.
        bool started_;
};
 
}
 
}
 
}
 
#endif // META_OCEAN_MEDIA_IMAGEIO_IIO_IMAGE_H