/*****************************************************************************

 * x265: ShortYUV class for short sized YUV-style frames

 *****************************************************************************

 * Copyright (C) 2013-2020 MulticoreWare, Inc

 *

 * Authors: Deepthi Nandakumar <deepthi@multicorewareinc.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_SHORTYUV_H

#define X265_SHORTYUV_H

#include "common.h"

namespace X265_NS {

// private namespace

class Yuv;

/* A ShortYuv instance holds int16_ts for a square CU (64x64 down to 8x8) for all three planes,

 * these are typically used to hold residual or coefficients */

class ShortYuv

{

public:

    int16_t* m_buf[3];

    uint32_t m_size;

    uint32_t m_csize;

    int      m_csp;

    int      m_hChromaShift;

    int      m_vChromaShift;

    ShortYuv();

    bool create(uint32_t size, int csp);

    void destroy();

    void clear();

    int16_t* getLumaAddr(uint32_t absPartIdx)                       { return m_buf[0] + getAddrOffset(absPartIdx, m_size); }

    int16_t* getCbAddr(uint32_t absPartIdx)                         { return m_buf[1] + getChromaAddrOffset(absPartIdx); }

    int16_t* getCrAddr(uint32_t absPartIdx)                         { return m_buf[2] + getChromaAddrOffset(absPartIdx); }

    int16_t* getChromaAddr(uint32_t chromaId, uint32_t partUnitIdx) { return m_buf[chromaId] + getChromaAddrOffset(partUnitIdx); }

    const int16_t* getLumaAddr(uint32_t absPartIdx) const                       { return m_buf[0] + getAddrOffset(absPartIdx, m_size); }

    const int16_t* getCbAddr(uint32_t absPartIdx) const                         { return m_buf[1] + getChromaAddrOffset(absPartIdx); }

    const int16_t* getCrAddr(uint32_t absPartIdx) const                         { return m_buf[2] + getChromaAddrOffset(absPartIdx); }

    const int16_t* getChromaAddr(uint32_t chromaId, uint32_t partUnitIdx) const { return m_buf[chromaId] + getChromaAddrOffset(partUnitIdx); }

    void subtract(const Yuv& srcYuv0, const Yuv& srcYuv1, uint32_t log2Size, int picCsp);

    void copyPartToPartLuma(ShortYuv& dstYuv, uint32_t absPartIdx, uint32_t log2Size) const;

    void copyPartToPartChroma(ShortYuv& dstYuv, uint32_t absPartIdx, uint32_t log2SizeL) const;

    void copyPartToPartLuma(Yuv& dstYuv, uint32_t absPartIdx, uint32_t log2Size) const;

    void copyPartToPartChroma(Yuv& dstYuv, uint32_t absPartIdx, uint32_t log2SizeL) const;

    int getChromaAddrOffset(uint32_t idx) const

    {

        int blkX = g_zscanToPelX[idx] >> m_hChromaShift;

        int blkY = g_zscanToPelY[idx] >> m_vChromaShift;

        return blkX + blkY * m_csize;

    }

    static int getAddrOffset(uint32_t idx, uint32_t width)

    {

        int blkX = g_zscanToPelX[idx];

        int blkY = g_zscanToPelY[idx];

        return blkX + blkY * width;

    }

};

}

#endif // ifndef X265_SHORTYUV_H