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/**
 * Copyright (c) 2015 Samsung Electronics Co., Ltd All Rights Reserved
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __IMAGECONTOURSTABILIZATOR_H__
#define __IMAGECONTOURSTABILIZATOR_H__

#include "ImageConfig.h"

#include <opencv/cv.h>

/**
 * @file  ImageContourStabilizator.h
 * @brief This file contains functionality for image contour stabilization
 *        during tracking.
 */

namespace MediaVision
{
namespace Image
{

/**
 * @class    ImageContourStabilizator
 * @brief    This class contains functionality for image contour stabilization
 *           during tracking.
 *
 * @since_tizen 3.0
 */
class ImageContourStabilizator
{
public:

    /**
     * @brief   @ref ImageContourStabilizator default constructor.
     *
     * @since_tizen 3.0
     */
    ImageContourStabilizator();

    /**
     * @brief Stabilizes @a contour.
     *
     * @since_tizen 3.0
     * @remarks Call this function alternately for each contour from sequence
     * @param [in,out] contour   @ref contour, which will be stabilized
     * @param [in]     params    configuration parameters
     * @return true if contour is stabilized, otherwise return false
     */
    bool stabilize(
            std::vector<cv::Point2f>& contour,
            const StabilizationParams& params);

    /**
     * @brief Resets stabilization process.
     *
     * @since_tizen 3.0
     * @remarks Call it before starting track on the new sequence of contours.
     */
    void reset(void);

private:

    std::vector<cv::Point2f> computeStabilizedQuadrangleContour(void);

private:

    static const size_t MovingHistoryAmount = 3u;

    std::vector<float> m_speeds;

    std::vector<size_t> m_currentCornersSpeed;

    std::deque<std::vector<cv::Point2f> > m_movingHistory;

    std::vector<cv::Point2f> m_lastStabilizedContour;

    size_t m_currentHistoryAmount;

    int m_tempContourIndex;

    std::vector<float> m_priorities;

    bool m_isPrepared;
};

} /* Image */
} /* MediaVision */

#endif /* __IMAGECONTOURSTABILIZATOR_H__ */