/*****************************************************************************
 * Copyright (C) 2013-2020 MulticoreWare, Inc
 *
 * Authors: Steve Borho <steve@borho.org>
 *          Min Chen <chenm003@163.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
 *
 * This program is also available under a commercial proprietary license.
 * For more information, contact us at license @ x265.com.
 *****************************************************************************/

#ifndef X265_MOTIONESTIMATE_H
#define X265_MOTIONESTIMATE_H

#include "primitives.h"
#include "reference.h"
#include "mv.h"
#include "bitcost.h"
#include "yuv.h"

namespace X265_NS {
// private x265 namespace

class MotionEstimate : public BitCost
{
protected:

    intptr_t blockOffset;
    
    int ctuAddr;
    int absPartIdx;  // part index of PU, including CU offset within CTU

    int searchMethod;
    int searchMethodL0;
    int searchMethodL1;
    int subpelRefine;

    int blockwidth;
    int blockheight;

    pixelcmp_t sad;
    pixelcmp_x3_t sad_x3;
    pixelcmp_x4_t sad_x4;
    pixelcmp_ads_t ads;
    pixelcmp_t satd;
    pixelcmp_t chromaSatd;

    MotionEstimate& operator =(const MotionEstimate&);

public:

    static const int COST_MAX = 1 << 28;

    uint32_t* integral[INTEGRAL_PLANE_NUM];
    Yuv fencPUYuv;
    int partEnum;
    bool bChromaSATD;

    MotionEstimate();
    ~MotionEstimate();

    static void initScales();
    static int hpelIterationCount(int subme);
    void init(int csp);

    /* Methods called at slice setup */
    void setSourcePU(pixel *fencY, intptr_t stride, intptr_t offset, int pwidth, int pheight, const int searchMethod, const int subpelRefine);
    void setSourcePU(pixel *fencY, intptr_t stride, intptr_t offset, int pwidth, int pheight, const int searchMethod, const int searchL0, const int searchL1, const int subpelRefine);
    void setSourcePU(const Yuv& srcFencYuv, int ctuAddr, int cuPartIdx, int puPartIdx, int pwidth, int pheight, const int searchMethod, const int subpelRefine, bool bChroma);

    /* buf*() and motionEstimate() methods all use cached fenc pixels and thus
     * require setSourcePU() to be called prior. */

    inline int bufSAD(const pixel* fref, intptr_t stride)  { return sad(fencPUYuv.m_buf[0], FENC_STRIDE, fref, stride); }

    inline int bufSATD(const pixel* fref, intptr_t stride) { return satd(fencPUYuv.m_buf[0], FENC_STRIDE, fref, stride); }

    inline int bufChromaSATD(const Yuv& refYuv, int puPartIdx)
    {
        return chromaSatd(refYuv.getCbAddr(puPartIdx), refYuv.m_csize, fencPUYuv.m_buf[1], fencPUYuv.m_csize) +
               chromaSatd(refYuv.getCrAddr(puPartIdx), refYuv.m_csize, fencPUYuv.m_buf[2], fencPUYuv.m_csize);
    }

    void refineMV(ReferencePlanes* ref, const MV& mvmin, const MV& mvmax, const MV& qmvp, MV& outQMv);
    int motionEstimate(ReferencePlanes* ref, const MV & mvmin, const MV & mvmax, const MV & qmvp, int numCandidates, const MV * mvc, int merange, MV & outQMv, uint32_t maxSlices, pixel *srcReferencePlane = 0);

    int subpelCompare(ReferencePlanes* ref, const MV &qmv, pixelcmp_t);

protected:

    inline void StarPatternSearch(ReferencePlanes *ref,
                                  const MV &       mvmin,
                                  const MV &       mvmax,
                                  MV &             bmv,
                                  int &            bcost,
                                  int &            bPointNr,
                                  int &            bDistance,
                                  int              earlyExitIters,
                                  int              merange,
                                  int              hme);
};
}

#endif // ifndef X265_MOTIONESTIMATE_H
