/* The copyright in this software is being made available under the BSD
 * License, included below. This software may be subject to other third party
 * and contributor rights, including patent rights, and no such rights are
 * granted under this license.
 *
 * Copyright (c) 2010-2014, ITU/ISO/IEC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

/** \file     TComYuv.cpp
    \brief    general YUV buffer class
    \todo     this should be merged with TComPicYuv
*/

#include <stdlib.h>
#include <memory.h>
#include <assert.h>
#include <math.h>

#include "CommonDef.h"
#include "TComYuv.h"
#include "TComInterpolationFilter.h"

//! \ingroup TLibCommon
//! \{

TComYuv::TComYuv()
{
  for(Int comp=0; comp<MAX_NUM_COMPONENT; comp++)
  {
    m_apiBuf[comp] = NULL;
  }
}

TComYuv::~TComYuv()
{
}

Void TComYuv::create( UInt iWidth, UInt iHeight, ChromaFormat chromaFormatIDC )
{
  // set width and height
  m_iWidth   = iWidth;
  m_iHeight  = iHeight;
  m_chromaFormatIDC = chromaFormatIDC;

  for(Int ch=0; ch<MAX_NUM_COMPONENT; ch++)
  {
    // memory allocation
    m_apiBuf[ch]  = (Pel*)xMalloc( Pel, getWidth(ComponentID(ch))*getHeight(ComponentID(ch)) );
  }
}

Void TComYuv::destroy()
{
  // memory free
  for(Int ch=0; ch<MAX_NUM_COMPONENT; ch++)
  {
    if (m_apiBuf[ch]!=NULL) { xFree( m_apiBuf[ch] ); m_apiBuf[ch] = NULL; }
  }
}

Void TComYuv::clear()
{
  for(Int ch=0; ch<MAX_NUM_COMPONENT; ch++)
  {
    if (m_apiBuf[ch]!=NULL)
      ::memset( m_apiBuf[ch], 0, ( getWidth(ComponentID(ch)) * getHeight(ComponentID(ch))  )*sizeof(Pel) );
  }
}




Void TComYuv::copyToPicYuv   ( TComPicYuv* pcPicYuvDst, const UInt ctuRsAddr, const UInt uiAbsZorderIdx, const UInt uiPartDepth, const UInt uiPartIdx ) const
{
  for(Int ch=0; ch<getNumberValidComponents(); ch++)
    copyToPicComponent  ( ComponentID(ch), pcPicYuvDst, ctuRsAddr, uiAbsZorderIdx, uiPartDepth, uiPartIdx );
}

Void TComYuv::copyToPicComponent  ( const ComponentID ch, TComPicYuv* pcPicYuvDst, const UInt ctuRsAddr, const UInt uiAbsZorderIdx, const UInt uiPartDepth, const UInt uiPartIdx ) const
{
  const Int iWidth  = getWidth(ch) >>uiPartDepth;
  const Int iHeight = getHeight(ch)>>uiPartDepth;

  const Pel* pSrc     = getAddr(ch, uiPartIdx, iWidth);
        Pel* pDst     = pcPicYuvDst->getAddr ( ch, ctuRsAddr, uiAbsZorderIdx );

  const UInt  iSrcStride  = getStride(ch);
  const UInt  iDstStride  = pcPicYuvDst->getStride(ch);

  for ( Int y = iHeight; y != 0; y-- )
  {
    ::memcpy( pDst, pSrc, sizeof(Pel)*iWidth);
    pDst += iDstStride;
    pSrc += iSrcStride;
  }
}




Void TComYuv::copyFromPicYuv   ( const TComPicYuv* pcPicYuvSrc, const UInt ctuRsAddr, const UInt uiAbsZorderIdx )
{
  for(Int ch=0; ch<getNumberValidComponents(); ch++)
    copyFromPicComponent  ( ComponentID(ch), pcPicYuvSrc, ctuRsAddr, uiAbsZorderIdx );
}

Void TComYuv::copyFromPicComponent  ( const ComponentID ch, const TComPicYuv* pcPicYuvSrc, const UInt ctuRsAddr, const UInt uiAbsZorderIdx )
{
        Pel* pDst     = getAddr(ch);
  const Pel* pSrc     = pcPicYuvSrc->getAddr ( ch, ctuRsAddr, uiAbsZorderIdx );

  const UInt iDstStride  = getStride(ch);
  const UInt iSrcStride  = pcPicYuvSrc->getStride(ch);
  const Int  iWidth=getWidth(ch);
  const Int  iHeight=getHeight(ch);

  for (Int y = iHeight; y != 0; y-- )
  {
    ::memcpy( pDst, pSrc, sizeof(Pel)*iWidth);
    pDst += iDstStride;
    pSrc += iSrcStride;
  }
}




Void TComYuv::copyToPartYuv( TComYuv* pcYuvDst, const UInt uiDstPartIdx ) const
{
  for(Int ch=0; ch<getNumberValidComponents(); ch++)
    copyToPartComponent  ( ComponentID(ch), pcYuvDst, uiDstPartIdx );
}

Void TComYuv::copyToPartComponent( const ComponentID ch, TComYuv* pcYuvDst, const UInt uiDstPartIdx ) const
{
  const Pel* pSrc     = getAddr(ch);
        Pel* pDst     = pcYuvDst->getAddr( ch, uiDstPartIdx );

  const UInt iSrcStride  = getStride(ch);
  const UInt iDstStride  = pcYuvDst->getStride(ch);
  const Int  iWidth=getWidth(ch);
  const Int  iHeight=getHeight(ch);

  for (Int y = iHeight; y != 0; y-- )
  {
    ::memcpy( pDst, pSrc, sizeof(Pel)*iWidth);
    pDst += iDstStride;
    pSrc += iSrcStride;
  }
}




Void TComYuv::copyPartToYuv( TComYuv* pcYuvDst, const UInt uiSrcPartIdx ) const
{
  for(Int ch=0; ch<getNumberValidComponents(); ch++)
    copyPartToComponent  ( ComponentID(ch), pcYuvDst, uiSrcPartIdx );
}

Void TComYuv::copyPartToComponent( const ComponentID ch, TComYuv* pcYuvDst, const UInt uiSrcPartIdx ) const
{
  const Pel* pSrc     = getAddr(ch, uiSrcPartIdx);
        Pel* pDst     = pcYuvDst->getAddr(ch, 0 );

  const UInt  iSrcStride  = getStride(ch);
  const UInt  iDstStride  = pcYuvDst->getStride(ch);

  const UInt uiHeight = pcYuvDst->getHeight(ch);
  const UInt uiWidth = pcYuvDst->getWidth(ch);

  for ( UInt y = uiHeight; y != 0; y-- )
  {
    ::memcpy( pDst, pSrc, sizeof(Pel)*uiWidth);
    pDst += iDstStride;
    pSrc += iSrcStride;
  }
}




Void TComYuv::copyPartToPartYuv   ( TComYuv* pcYuvDst, const UInt uiPartIdx, const UInt iWidth, const UInt iHeight ) const
{
  for(Int ch=0; ch<getNumberValidComponents(); ch++)
    copyPartToPartComponent   (ComponentID(ch), pcYuvDst, uiPartIdx, iWidth>>getComponentScaleX(ComponentID(ch)), iHeight>>getComponentScaleY(ComponentID(ch)) );
}

Void TComYuv::copyPartToPartComponent  ( const ComponentID ch, TComYuv* pcYuvDst, const UInt uiPartIdx, const UInt iWidthComponent, const UInt iHeightComponent ) const
{
  const Pel* pSrc =           getAddr(ch, uiPartIdx);
        Pel* pDst = pcYuvDst->getAddr(ch, uiPartIdx);
  if( pSrc == pDst )
  {
    //th not a good idea
    //th best would be to fix the caller
    return ;
  }

  const UInt  iSrcStride = getStride(ch);
  const UInt  iDstStride = pcYuvDst->getStride(ch);
  for ( UInt y = iHeightComponent; y != 0; y-- )
  {
    ::memcpy( pDst, pSrc, iWidthComponent * sizeof(Pel) );
    pSrc += iSrcStride;
    pDst += iDstStride;
  }
}




Void TComYuv::copyPartToPartComponentMxN  ( const ComponentID ch, TComYuv* pcYuvDst, const TComRectangle &rect) const
{
  const Pel* pSrc =           getAddrPix( ch, rect.x0, rect.y0 );
        Pel* pDst = pcYuvDst->getAddrPix( ch, rect.x0, rect.y0 );
  if( pSrc == pDst )
  {
    //th not a good idea
    //th best would be to fix the caller
    return ;
  }

  const UInt  iSrcStride = getStride(ch);
  const UInt  iDstStride = pcYuvDst->getStride(ch);
  const UInt uiHeightComponent=rect.height;
  const UInt uiWidthComponent=rect.width;
  for ( UInt y = uiHeightComponent; y != 0; y-- )
  {
    ::memcpy( pDst, pSrc, uiWidthComponent * sizeof( Pel ) );
    pSrc += iSrcStride;
    pDst += iDstStride;
  }
}




Void TComYuv::addClip( const TComYuv* pcYuvSrc0, const TComYuv* pcYuvSrc1, const UInt uiTrUnitIdx, const UInt uiPartSize )
{
  for(Int chan=0; chan<getNumberValidComponents(); chan++)
  {
    const ComponentID ch=ComponentID(chan);
    const Int uiPartWidth =uiPartSize>>getComponentScaleX(ch);
    const Int uiPartHeight=uiPartSize>>getComponentScaleY(ch);

    const Pel* pSrc0 = pcYuvSrc0->getAddr(ch, uiTrUnitIdx, uiPartWidth );
    const Pel* pSrc1 = pcYuvSrc1->getAddr(ch, uiTrUnitIdx, uiPartWidth );
          Pel* pDst  = getAddr(ch, uiTrUnitIdx, uiPartWidth );

    const UInt iSrc0Stride = pcYuvSrc0->getStride(ch);
    const UInt iSrc1Stride = pcYuvSrc1->getStride(ch);
    const UInt iDstStride  = getStride(ch);
    const Int clipbd = g_bitDepth[toChannelType(ch)];
#if O0043_BEST_EFFORT_DECODING
    const Int bitDepthDelta = g_bitDepthInStream[toChannelType(ch)] - g_bitDepth[toChannelType(ch)];
#endif

    for ( Int y = uiPartHeight-1; y >= 0; y-- )
    {
      for ( Int x = uiPartWidth-1; x >= 0; x-- )
      {
#if O0043_BEST_EFFORT_DECODING
        pDst[x] = Pel(ClipBD<Int>( Int(pSrc0[x]) + rightShiftEvenRounding<Pel>(pSrc1[x], bitDepthDelta), clipbd));
#else
        pDst[x] = Pel(ClipBD<Int>( Int(pSrc0[x]) + Int(pSrc1[x]), clipbd));
#endif
      }
      pSrc0 += iSrc0Stride;
      pSrc1 += iSrc1Stride;
      pDst  += iDstStride;
    }
  }
}




Void TComYuv::subtract( const TComYuv* pcYuvSrc0, const TComYuv* pcYuvSrc1, const UInt uiTrUnitIdx, const UInt uiPartSize )
{
  for(Int chan=0; chan<getNumberValidComponents(); chan++)
  {
    const ComponentID ch=ComponentID(chan);
    const Int uiPartWidth =uiPartSize>>getComponentScaleX(ch);
    const Int uiPartHeight=uiPartSize>>getComponentScaleY(ch);

    const Pel* pSrc0 = pcYuvSrc0->getAddr( ch, uiTrUnitIdx, uiPartWidth );
    const Pel* pSrc1 = pcYuvSrc1->getAddr( ch, uiTrUnitIdx, uiPartWidth );
          Pel* pDst  = getAddr( ch, uiTrUnitIdx, uiPartWidth );

    const Int  iSrc0Stride = pcYuvSrc0->getStride(ch);
    const Int  iSrc1Stride = pcYuvSrc1->getStride(ch);
    const Int  iDstStride  = getStride(ch);

    for (Int y = uiPartHeight-1; y >= 0; y-- )
    {
      for (Int x = uiPartWidth-1; x >= 0; x-- )
      {
        pDst[x] = pSrc0[x] - pSrc1[x];
      }
      pSrc0 += iSrc0Stride;
      pSrc1 += iSrc1Stride;
      pDst  += iDstStride;
    }
  }
}




Void TComYuv::addAvg( const TComYuv* pcYuvSrc0, const TComYuv* pcYuvSrc1, const UInt iPartUnitIdx, const UInt uiWidth, const UInt uiHeight )
{
  for(Int chan=0; chan<getNumberValidComponents(); chan++)
  {
    const ComponentID ch=ComponentID(chan);
    const Pel* pSrc0  = pcYuvSrc0->getAddr( ch, iPartUnitIdx );
    const Pel* pSrc1  = pcYuvSrc1->getAddr( ch, iPartUnitIdx );
    Pel* pDst   = getAddr( ch, iPartUnitIdx );

    const UInt  iSrc0Stride = pcYuvSrc0->getStride(ch);
    const UInt  iSrc1Stride = pcYuvSrc1->getStride(ch);
    const UInt  iDstStride  = getStride(ch);
    const Int   clipbd      = g_bitDepth[toChannelType(ch)];
    const Int   shiftNum    = std::max<Int>(2, (IF_INTERNAL_PREC - clipbd)) + 1;
    const Int   offset      = ( 1 << ( shiftNum - 1 ) ) + 2 * IF_INTERNAL_OFFS;

    const Int   iWidth      = uiWidth  >> getComponentScaleX(ch);
    const Int   iHeight     = uiHeight >> getComponentScaleY(ch);

    if (iWidth&1)
    {
      assert(0);
      exit(-1);
    }
    else if (iWidth&2)
    {
      for ( Int y = 0; y < iHeight; y++ )
      {
        for (Int x=0 ; x < iWidth; x+=2 )
        {
          pDst[ x + 0 ] = ClipBD( rightShift(( pSrc0[ x + 0 ] + pSrc1[ x + 0 ] + offset ), shiftNum), clipbd );
          pDst[ x + 1 ] = ClipBD( rightShift(( pSrc0[ x + 1 ] + pSrc1[ x + 1 ] + offset ), shiftNum), clipbd );
        }
        pSrc0 += iSrc0Stride;
        pSrc1 += iSrc1Stride;
        pDst  += iDstStride;
      }
    }
    else
    {
      for ( Int y = 0; y < iHeight; y++ )
      {
        for (Int x=0 ; x < iWidth; x+=4 )
        {
          pDst[ x + 0 ] = ClipBD( rightShift(( pSrc0[ x + 0 ] + pSrc1[ x + 0 ] + offset ), shiftNum), clipbd );
          pDst[ x + 1 ] = ClipBD( rightShift(( pSrc0[ x + 1 ] + pSrc1[ x + 1 ] + offset ), shiftNum), clipbd );
          pDst[ x + 2 ] = ClipBD( rightShift(( pSrc0[ x + 2 ] + pSrc1[ x + 2 ] + offset ), shiftNum), clipbd );
          pDst[ x + 3 ] = ClipBD( rightShift(( pSrc0[ x + 3 ] + pSrc1[ x + 3 ] + offset ), shiftNum), clipbd );
        }
        pSrc0 += iSrc0Stride;
        pSrc1 += iSrc1Stride;
        pDst  += iDstStride;
      }
    }
  }
}

Void TComYuv::removeHighFreq( const TComYuv* pcYuvSrc, const UInt uiPartIdx, const UInt uiWidth, UInt const uiHeight )
{
  for(Int chan=0; chan<getNumberValidComponents(); chan++)
  {
    const ComponentID ch=ComponentID(chan);
#if !DISABLING_CLIP_FOR_BIPREDME
    const ChannelType chType=toChannelType(ch);
#endif

    const Pel* pSrc  = pcYuvSrc->getAddr(ch, uiPartIdx);
    Pel* pDst  = getAddr(ch, uiPartIdx);

    const Int iSrcStride = pcYuvSrc->getStride(ch);
    const Int iDstStride = getStride(ch);
    const Int iWidth  = uiWidth >>getComponentScaleX(ch);
    const Int iHeight = uiHeight>>getComponentScaleY(ch);

    for ( Int y = iHeight-1; y >= 0; y-- )
    {
      for ( Int x = iWidth-1; x >= 0; x-- )
      {
#if DISABLING_CLIP_FOR_BIPREDME
        pDst[x ] = (2 * pDst[x]) - pSrc[x];
#else
        pDst[x ] = Clip((2 * pDst[x]) - pSrc[x], chType);
#endif
      }
      pSrc += iSrcStride;
      pDst += iDstStride;
    }
  }
}

//! \}