/* 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
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

/** \file     TComPattern.cpp
    \brief    neighbouring pixel access classes
*/

#include "TComPic.h"
#include "TComPattern.h"
#include "TComDataCU.h"

//! \ingroup TLibCommon
//! \{

// ====================================================================================================================
// Tables
// ====================================================================================================================

const UChar TComPattern::m_aucIntraFilter[5] =
{
  10, //4x4
  7, //8x8
  1, //16x16
  0, //32x32
  10, //64x64
};

// ====================================================================================================================
// Public member functions (TComPatternParam)
// ====================================================================================================================

/** \param  piTexture     pixel data
 \param  iRoiWidth     pattern width
 \param  iRoiHeight    pattern height
 \param  iStride       buffer stride
 \param  iOffsetLeft   neighbour offset (left)
 \param  iOffsetAbove  neighbour offset (above)
 */
Void TComPatternParam::setPatternParamPel ( Pel* piTexture,
                                           Int iRoiWidth,
                                           Int iRoiHeight,
                                           Int iStride,
                                           Int iOffsetLeft,
                                           Int iOffsetAbove )
{
  m_piPatternOrigin = piTexture;
  m_iROIWidth       = iRoiWidth;
  m_iROIHeight      = iRoiHeight;
  m_iPatternStride  = iStride;
  m_iOffsetLeft     = iOffsetLeft;
  m_iOffsetAbove    = iOffsetAbove;
}

/**
 \param  pcCU          CU data structure
 \param  iComp         component index (0=Y, 1=Cb, 2=Cr)
 \param  iRoiWidth     pattern width
 \param  iRoiHeight    pattern height
 \param  iStride       buffer stride
 \param  iOffsetLeft   neighbour offset (left)
 \param  iOffsetAbove  neighbour offset (above)
 \param  uiAbsPartIdx  part index
 */
Void TComPatternParam::setPatternParamCU( TComDataCU* pcCU,
                                         UChar       iComp,
                                         UChar       iRoiWidth,
                                         UChar       iRoiHeight,
                                         Int         iOffsetLeft,
                                         Int         iOffsetAbove,
                                         UInt        uiAbsPartIdx )
{
  m_iOffsetLeft   = iOffsetLeft;
  m_iOffsetAbove  = iOffsetAbove;
  
  m_iROIWidth     = iRoiWidth;
  m_iROIHeight    = iRoiHeight;
  
  UInt uiAbsZorderIdx = pcCU->getZorderIdxInCU() + uiAbsPartIdx;
  
  if ( iComp == 0 )
  {
    m_iPatternStride  = pcCU->getPic()->getStride();
    m_piPatternOrigin = pcCU->getPic()->getPicYuvRec()->getLumaAddr(pcCU->getAddr(), uiAbsZorderIdx) - m_iOffsetAbove * m_iPatternStride - m_iOffsetLeft;
  }
  else
  {
    m_iPatternStride = pcCU->getPic()->getCStride();
    if ( iComp == 1 )
    {
      m_piPatternOrigin = pcCU->getPic()->getPicYuvRec()->getCbAddr(pcCU->getAddr(), uiAbsZorderIdx) - m_iOffsetAbove * m_iPatternStride - m_iOffsetLeft;
    }
    else
    {
      m_piPatternOrigin = pcCU->getPic()->getPicYuvRec()->getCrAddr(pcCU->getAddr(), uiAbsZorderIdx) - m_iOffsetAbove * m_iPatternStride - m_iOffsetLeft;
    }
  }
}

// ====================================================================================================================
// Public member functions (TComPattern)
// ====================================================================================================================

Void TComPattern::initPattern ( Pel* piY,
                               Pel* piCb,
                               Pel* piCr,
                               Int iRoiWidth,
                               Int iRoiHeight,
                               Int iStride,
                               Int iOffsetLeft,
                               Int iOffsetAbove )
{
  m_cPatternY. setPatternParamPel( piY,  iRoiWidth,      iRoiHeight,      iStride,      iOffsetLeft,      iOffsetAbove      );
  m_cPatternCb.setPatternParamPel( piCb, iRoiWidth >> 1, iRoiHeight >> 1, iStride >> 1, iOffsetLeft >> 1, iOffsetAbove >> 1 );
  m_cPatternCr.setPatternParamPel( piCr, iRoiWidth >> 1, iRoiHeight >> 1, iStride >> 1, iOffsetLeft >> 1, iOffsetAbove >> 1 );
  
  return;
}

Void TComPattern::initPattern( TComDataCU* pcCU, UInt uiPartDepth, UInt uiAbsPartIdx )
{
  Int   uiOffsetLeft  = 0;
  Int   uiOffsetAbove = 0;
  
  UChar uiWidth          = pcCU->getWidth (0)>>uiPartDepth;
  UChar uiHeight         = pcCU->getHeight(0)>>uiPartDepth;
  
  UInt  uiAbsZorderIdx   = pcCU->getZorderIdxInCU() + uiAbsPartIdx;
  UInt  uiCurrPicPelX    = pcCU->getCUPelX() + g_auiRasterToPelX[ g_auiZscanToRaster[uiAbsZorderIdx] ];
  UInt  uiCurrPicPelY    = pcCU->getCUPelY() + g_auiRasterToPelY[ g_auiZscanToRaster[uiAbsZorderIdx] ];
  
  if( uiCurrPicPelX != 0 )
  {
    uiOffsetLeft = 1;
  }
  
  if( uiCurrPicPelY != 0 )
  {
    uiOffsetAbove = 1;
  }
  
  m_cPatternY .setPatternParamCU( pcCU, 0, uiWidth,      uiHeight,      uiOffsetLeft, uiOffsetAbove, uiAbsPartIdx );
  m_cPatternCb.setPatternParamCU( pcCU, 1, uiWidth >> 1, uiHeight >> 1, uiOffsetLeft, uiOffsetAbove, uiAbsPartIdx );
  m_cPatternCr.setPatternParamCU( pcCU, 2, uiWidth >> 1, uiHeight >> 1, uiOffsetLeft, uiOffsetAbove, uiAbsPartIdx );
}

Void TComPattern::initAdiPattern( TComDataCU* pcCU, UInt uiZorderIdxInPart, UInt uiPartDepth, Int* piAdiBuf, Int iOrgBufStride, Int iOrgBufHeight, Bool& bAbove, Bool& bLeft, Bool bLMmode )
{
  Pel*  piRoiOrigin;
  Int*  piAdiTemp;
  UInt  uiCuWidth   = pcCU->getWidth(0) >> uiPartDepth;
  UInt  uiCuHeight  = pcCU->getHeight(0)>> uiPartDepth;
  UInt  uiCuWidth2  = uiCuWidth<<1;
  UInt  uiCuHeight2 = uiCuHeight<<1;
  UInt  uiWidth;
  UInt  uiHeight;
  Int   iPicStride = pcCU->getPic()->getStride();
  Int   iUnitSize = 0;
  Int   iNumUnitsInCu = 0;
  Int   iTotalUnits = 0;
  Bool  bNeighborFlags[4 * MAX_NUM_SPU_W + 1];
  Int   iNumIntraNeighbor = 0;
  
  UInt uiPartIdxLT, uiPartIdxRT, uiPartIdxLB;

  
  pcCU->deriveLeftRightTopIdxAdi( uiPartIdxLT, uiPartIdxRT, uiZorderIdxInPart, uiPartDepth );
  pcCU->deriveLeftBottomIdxAdi  ( uiPartIdxLB,              uiZorderIdxInPart, uiPartDepth );
  
  iUnitSize      = g_uiMaxCUWidth >> g_uiMaxCUDepth;
  iNumUnitsInCu  = uiCuWidth / iUnitSize;
  iTotalUnits    = (iNumUnitsInCu << 2) + 1;

  bNeighborFlags[iNumUnitsInCu*2] = isAboveLeftAvailable( pcCU, uiPartIdxLT );
  iNumIntraNeighbor  += (Int)(bNeighborFlags[iNumUnitsInCu*2]);
  iNumIntraNeighbor  += isAboveAvailable     ( pcCU, uiPartIdxLT, uiPartIdxRT, bNeighborFlags+(iNumUnitsInCu*2)+1 );
  iNumIntraNeighbor  += isAboveRightAvailable( pcCU, uiPartIdxLT, uiPartIdxRT, bNeighborFlags+(iNumUnitsInCu*3)+1 );
  iNumIntraNeighbor  += isLeftAvailable      ( pcCU, uiPartIdxLT, uiPartIdxLB, bNeighborFlags+(iNumUnitsInCu*2)-1 );
  iNumIntraNeighbor  += isBelowLeftAvailable ( pcCU, uiPartIdxLT, uiPartIdxLB, bNeighborFlags+ iNumUnitsInCu   -1 );
  
  bAbove = true;
  bLeft  = true;

  uiWidth=uiCuWidth2+1;
  uiHeight=uiCuHeight2+1;
  
  if (((uiWidth<<2)>iOrgBufStride)||((uiHeight<<2)>iOrgBufHeight))
  {
    return;
  }
  
  piRoiOrigin = pcCU->getPic()->getPicYuvRec()->getLumaAddr(pcCU->getAddr(), pcCU->getZorderIdxInCU()+uiZorderIdxInPart);
  piAdiTemp   = piAdiBuf;

  fillReferenceSamples (g_bitDepthY, piRoiOrigin, piAdiTemp, bNeighborFlags, iNumIntraNeighbor, iUnitSize, iNumUnitsInCu, iTotalUnits, uiCuWidth, uiCuHeight, uiWidth, uiHeight, iPicStride, bLMmode);
  
  Int   i;
  // generate filtered intra prediction samples
  Int iBufSize = uiCuHeight2 + uiCuWidth2 + 1;  // left and left above border + above and above right border + top left corner = length of 3. filter buffer

  UInt uiWH = uiWidth * uiHeight;               // number of elements in one buffer

  Int* piFilteredBuf1 = piAdiBuf + uiWH;        // 1. filter buffer
  Int* piFilteredBuf2 = piFilteredBuf1 + uiWH;  // 2. filter buffer
  Int* piFilterBuf = piFilteredBuf2 + uiWH;     // buffer for 2. filtering (sequential)
  Int* piFilterBufN = piFilterBuf + iBufSize;   // buffer for 1. filtering (sequential)

  Int l = 0;
  // left border from bottom to top
  for (i = 0; i < uiCuHeight2; i++)
  {
    piFilterBuf[l++] = piAdiTemp[uiWidth * (uiCuHeight2 - i)];
  }
  // top left corner
  piFilterBuf[l++] = piAdiTemp[0];
  // above border from left to right
  for (i=0; i < uiCuWidth2; i++)
  {
    piFilterBuf[l++] = piAdiTemp[1 + i];
  }

  if (pcCU->getSlice()->getSPS()->getUseStrongIntraSmoothing())
  {
    Int blkSize = 32;
    Int bottomLeft = piFilterBuf[0];
    Int topLeft = piFilterBuf[uiCuHeight2];
    Int topRight = piFilterBuf[iBufSize-1];
    Int threshold = 1 << (g_bitDepthY - 5);
    Bool bilinearLeft = abs(bottomLeft+topLeft-2*piFilterBuf[uiCuHeight]) < threshold;
    Bool bilinearAbove  = abs(topLeft+topRight-2*piFilterBuf[uiCuHeight2+uiCuHeight]) < threshold;
  
    if (uiCuWidth>=blkSize && (bilinearLeft && bilinearAbove))
    {
      Int shift = g_aucConvertToBit[uiCuWidth] + 3;  // log2(uiCuHeight2)
      piFilterBufN[0] = piFilterBuf[0];
      piFilterBufN[uiCuHeight2] = piFilterBuf[uiCuHeight2];
      piFilterBufN[iBufSize - 1] = piFilterBuf[iBufSize - 1];
      for (i = 1; i < uiCuHeight2; i++)
      {
        piFilterBufN[i] = ((uiCuHeight2-i)*bottomLeft + i*topLeft + uiCuHeight) >> shift;
      }
  
      for (i = 1; i < uiCuWidth2; i++)
      {
        piFilterBufN[uiCuHeight2 + i] = ((uiCuWidth2-i)*topLeft + i*topRight + uiCuWidth) >> shift;
      }
    }
    else 
    {
      // 1. filtering with [1 2 1]
      piFilterBufN[0] = piFilterBuf[0];
      piFilterBufN[iBufSize - 1] = piFilterBuf[iBufSize - 1];
      for (i = 1; i < iBufSize - 1; i++)
      {
        piFilterBufN[i] = (piFilterBuf[i - 1] + 2 * piFilterBuf[i]+piFilterBuf[i + 1] + 2) >> 2;
      }
    }
  }
  else 
  {
    // 1. filtering with [1 2 1]
    piFilterBufN[0] = piFilterBuf[0];
    piFilterBufN[iBufSize - 1] = piFilterBuf[iBufSize - 1];
    for (i = 1; i < iBufSize - 1; i++)
    {
      piFilterBufN[i] = (piFilterBuf[i - 1] + 2 * piFilterBuf[i]+piFilterBuf[i + 1] + 2) >> 2;
    }
  }

  // fill 1. filter buffer with filtered values
  l=0;
  for (i = 0; i < uiCuHeight2; i++)
  {
    piFilteredBuf1[uiWidth * (uiCuHeight2 - i)] = piFilterBufN[l++];
  }
  piFilteredBuf1[0] = piFilterBufN[l++];
  for (i = 0; i < uiCuWidth2; i++)
  {
    piFilteredBuf1[1 + i] = piFilterBufN[l++];
  }
}

Void TComPattern::initAdiPatternChroma( TComDataCU* pcCU, UInt uiZorderIdxInPart, UInt uiPartDepth, Int* piAdiBuf, Int iOrgBufStride, Int iOrgBufHeight, Bool& bAbove, Bool& bLeft )
{
  Pel*  piRoiOrigin;
  Int*  piAdiTemp;
  UInt  uiCuWidth  = pcCU->getWidth (0) >> uiPartDepth;
  UInt  uiCuHeight = pcCU->getHeight(0) >> uiPartDepth;
  UInt  uiWidth;
  UInt  uiHeight;
  Int   iPicStride = pcCU->getPic()->getCStride();

  Int   iUnitSize = 0;
  Int   iNumUnitsInCu = 0;
  Int   iTotalUnits = 0;
  Bool  bNeighborFlags[4 * MAX_NUM_SPU_W + 1];
  Int   iNumIntraNeighbor = 0;
  
  UInt uiPartIdxLT, uiPartIdxRT, uiPartIdxLB;
  
  pcCU->deriveLeftRightTopIdxAdi( uiPartIdxLT, uiPartIdxRT, uiZorderIdxInPart, uiPartDepth );
  pcCU->deriveLeftBottomIdxAdi  ( uiPartIdxLB,              uiZorderIdxInPart, uiPartDepth );
  
  iUnitSize      = (g_uiMaxCUWidth >> g_uiMaxCUDepth) >> 1; // for chroma
  iNumUnitsInCu  = (uiCuWidth / iUnitSize) >> 1;            // for chroma
  iTotalUnits    = (iNumUnitsInCu << 2) + 1;

  bNeighborFlags[iNumUnitsInCu*2] = isAboveLeftAvailable( pcCU, uiPartIdxLT );
  iNumIntraNeighbor  += (Int)(bNeighborFlags[iNumUnitsInCu*2]);
  iNumIntraNeighbor  += isAboveAvailable     ( pcCU, uiPartIdxLT, uiPartIdxRT, bNeighborFlags+(iNumUnitsInCu*2)+1 );
  iNumIntraNeighbor  += isAboveRightAvailable( pcCU, uiPartIdxLT, uiPartIdxRT, bNeighborFlags+(iNumUnitsInCu*3)+1 );
  iNumIntraNeighbor  += isLeftAvailable      ( pcCU, uiPartIdxLT, uiPartIdxLB, bNeighborFlags+(iNumUnitsInCu*2)-1 );
  iNumIntraNeighbor  += isBelowLeftAvailable ( pcCU, uiPartIdxLT, uiPartIdxLB, bNeighborFlags+ iNumUnitsInCu   -1 );
  
  bAbove = true;
  bLeft  = true;
  
  uiCuWidth=uiCuWidth>>1;  // for chroma
  uiCuHeight=uiCuHeight>>1;  // for chroma
  
  uiWidth=uiCuWidth*2+1;
  uiHeight=uiCuHeight*2+1;
  
  if ((4*uiWidth>iOrgBufStride)||(4*uiHeight>iOrgBufHeight))
  {
    return;
  }
  
  // get Cb pattern
  piRoiOrigin = pcCU->getPic()->getPicYuvRec()->getCbAddr(pcCU->getAddr(), pcCU->getZorderIdxInCU()+uiZorderIdxInPart);
  piAdiTemp   = piAdiBuf;

  fillReferenceSamples (g_bitDepthC, piRoiOrigin, piAdiTemp, bNeighborFlags, iNumIntraNeighbor, iUnitSize, iNumUnitsInCu, iTotalUnits, uiCuWidth, uiCuHeight, uiWidth, uiHeight, iPicStride);
  
  // get Cr pattern
  piRoiOrigin = pcCU->getPic()->getPicYuvRec()->getCrAddr(pcCU->getAddr(), pcCU->getZorderIdxInCU()+uiZorderIdxInPart);
  piAdiTemp   = piAdiBuf+uiWidth*uiHeight;
  
  fillReferenceSamples (g_bitDepthC, piRoiOrigin, piAdiTemp, bNeighborFlags, iNumIntraNeighbor, iUnitSize, iNumUnitsInCu, iTotalUnits, uiCuWidth, uiCuHeight, uiWidth, uiHeight, iPicStride);
}

Void TComPattern::fillReferenceSamples(Int bitDepth, Pel* piRoiOrigin, Int* piAdiTemp, Bool* bNeighborFlags, Int iNumIntraNeighbor, Int iUnitSize, Int iNumUnitsInCu, Int iTotalUnits, UInt uiCuWidth, UInt uiCuHeight, UInt uiWidth, UInt uiHeight, Int iPicStride, Bool bLMmode )
{
  Pel* piRoiTemp;
  Int  i, j;
  Int  iDCValue = 1 << (bitDepth - 1);

  if (iNumIntraNeighbor == 0)
  {
    // Fill border with DC value
    for (i=0; i<uiWidth; i++)
    {
      piAdiTemp[i] = iDCValue;
    }
    for (i=1; i<uiHeight; i++)
    {
      piAdiTemp[i*uiWidth] = iDCValue;
    }
  }
  else if (iNumIntraNeighbor == iTotalUnits)
  {
    // Fill top-left border with rec. samples
    piRoiTemp = piRoiOrigin - iPicStride - 1;
    piAdiTemp[0] = piRoiTemp[0];

    // Fill left border with rec. samples
    piRoiTemp = piRoiOrigin - 1;

    if (bLMmode)
    {
      piRoiTemp --; // move to the second left column
    }

    for (i=0; i<uiCuHeight; i++)
    {
      piAdiTemp[(1+i)*uiWidth] = piRoiTemp[0];
      piRoiTemp += iPicStride;
    }

    // Fill below left border with rec. samples
    for (i=0; i<uiCuHeight; i++)
    {
      piAdiTemp[(1+uiCuHeight+i)*uiWidth] = piRoiTemp[0];
      piRoiTemp += iPicStride;
    }

    // Fill top border with rec. samples
    piRoiTemp = piRoiOrigin - iPicStride;
    for (i=0; i<uiCuWidth; i++)
    {
      piAdiTemp[1+i] = piRoiTemp[i];
    }
    
    // Fill top right border with rec. samples
    piRoiTemp = piRoiOrigin - iPicStride + uiCuWidth;
    for (i=0; i<uiCuWidth; i++)
    {
      piAdiTemp[1+uiCuWidth+i] = piRoiTemp[i];
    }
  }
  else // reference samples are partially available
  {
    Int  iNumUnits2 = iNumUnitsInCu<<1;
    Int  iTotalSamples = iTotalUnits*iUnitSize;
    Pel  piAdiLine[5 * MAX_CU_SIZE];
    Pel  *piAdiLineTemp; 
    Bool *pbNeighborFlags;
    Int  iNext, iCurr;
    Pel  piRef = 0;

    // Initialize
    for (i=0; i<iTotalSamples; i++)
    {
      piAdiLine[i] = iDCValue;
    }
    
    // Fill top-left sample
    piRoiTemp = piRoiOrigin - iPicStride - 1;
    piAdiLineTemp = piAdiLine + (iNumUnits2*iUnitSize);
    pbNeighborFlags = bNeighborFlags + iNumUnits2;
    if (*pbNeighborFlags)
    {
      piAdiLineTemp[0] = piRoiTemp[0];
      for (i=1; i<iUnitSize; i++)
      {
        piAdiLineTemp[i] = piAdiLineTemp[0];
      }
    }

    // Fill left & below-left samples
    piRoiTemp += iPicStride;
    if (bLMmode)
    {
      piRoiTemp --; // move the second left column
    }
    piAdiLineTemp--;
    pbNeighborFlags--;
    for (j=0; j<iNumUnits2; j++)
    {
      if (*pbNeighborFlags)
      {
        for (i=0; i<iUnitSize; i++)
        {
          piAdiLineTemp[-i] = piRoiTemp[i*iPicStride];
        }
      }
      piRoiTemp += iUnitSize*iPicStride;
      piAdiLineTemp -= iUnitSize;
      pbNeighborFlags--;
    }

    // Fill above & above-right samples
    piRoiTemp = piRoiOrigin - iPicStride;
    piAdiLineTemp = piAdiLine + ((iNumUnits2+1)*iUnitSize);
    pbNeighborFlags = bNeighborFlags + iNumUnits2 + 1;
    for (j=0; j<iNumUnits2; j++)
    {
      if (*pbNeighborFlags)
      {
        for (i=0; i<iUnitSize; i++)
        {
          piAdiLineTemp[i] = piRoiTemp[i];
        }
      }
      piRoiTemp += iUnitSize;
      piAdiLineTemp += iUnitSize;
      pbNeighborFlags++;
    }

    // Pad reference samples when necessary
    iCurr = 0;
    iNext = 1;
    piAdiLineTemp = piAdiLine;
    while (iCurr < iTotalUnits)
    {
      if (!bNeighborFlags[iCurr])
      {
        if(iCurr == 0)
        {
          while (iNext < iTotalUnits && !bNeighborFlags[iNext])
          {
            iNext++;
          }
          piRef = piAdiLine[iNext*iUnitSize];
          // Pad unavailable samples with new value
          while (iCurr < iNext)
          {
            for (i=0; i<iUnitSize; i++)
            {
              piAdiLineTemp[i] = piRef;
            }
            piAdiLineTemp += iUnitSize;
            iCurr++;
          }
        }
        else
        {
          piRef = piAdiLine[iCurr*iUnitSize-1];
          for (i=0; i<iUnitSize; i++)
          {
            piAdiLineTemp[i] = piRef;
          }
          piAdiLineTemp += iUnitSize;
          iCurr++;
        }
      }
      else
      {
        piAdiLineTemp += iUnitSize;
        iCurr++;
      }
    }

    // Copy processed samples
    piAdiLineTemp = piAdiLine + uiHeight + iUnitSize - 2;
    for (i=0; i<uiWidth; i++)
    {
      piAdiTemp[i] = piAdiLineTemp[i];
    }
    piAdiLineTemp = piAdiLine + uiHeight - 1;
    for (i=1; i<uiHeight; i++)
    {
      piAdiTemp[i*uiWidth] = piAdiLineTemp[-i];
    }
  }
}

Int* TComPattern::getAdiOrgBuf( Int /*iCuWidth*/, Int /*iCuHeight*/, Int* piAdiBuf)
{
  return piAdiBuf;
}

Int* TComPattern::getAdiCbBuf( Int /*iCuWidth*/, Int /*iCuHeight*/, Int* piAdiBuf)
{
  return piAdiBuf;
}

Int* TComPattern::getAdiCrBuf(Int iCuWidth,Int iCuHeight, Int* piAdiBuf)
{
  return piAdiBuf+(iCuWidth*2+1)*(iCuHeight*2+1);
}

/** Get pointer to reference samples for intra prediction
 * \param uiDirMode   prediction mode index
 * \param log2BlkSize size of block (2 = 4x4, 3 = 8x8, 4 = 16x16, 5 = 32x32, 6 = 64x64)
 * \param piAdiBuf    pointer to unfiltered reference samples
 * \return            pointer to (possibly filtered) reference samples
 *
 * The prediction mode index is used to determine whether a smoothed reference sample buffer is returned.
 */
Int* TComPattern::getPredictorPtr( UInt uiDirMode, UInt log2BlkSize, Int* piAdiBuf )
{
  Int* piSrc;
  assert(log2BlkSize >= 2 && log2BlkSize < 7);
  Int diff = min<Int>(abs((Int) uiDirMode - HOR_IDX), abs((Int)uiDirMode - VER_IDX));
  UChar ucFiltIdx = diff > m_aucIntraFilter[log2BlkSize - 2] ? 1 : 0;
  if (uiDirMode == DC_IDX)
  {
    ucFiltIdx = 0; //no smoothing for DC or LM chroma
  }

  assert( ucFiltIdx <= 1 );

  Int width  = 1 << log2BlkSize;
  Int height = 1 << log2BlkSize;
  
  piSrc = getAdiOrgBuf( width, height, piAdiBuf );

  if ( ucFiltIdx )
  {
    piSrc += (2 * width + 1) * (2 * height + 1);
  }

  return piSrc;
}

Bool TComPattern::isAboveLeftAvailable( TComDataCU* pcCU, UInt uiPartIdxLT )
{
  Bool bAboveLeftFlag;
  UInt uiPartAboveLeft;
  TComDataCU* pcCUAboveLeft = pcCU->getPUAboveLeft( uiPartAboveLeft, uiPartIdxLT );
  if(pcCU->getSlice()->getPPS()->getConstrainedIntraPred())
  {
    bAboveLeftFlag = ( pcCUAboveLeft && pcCUAboveLeft->getPredictionMode( uiPartAboveLeft ) == MODE_INTRA );
  }
  else
  {
    bAboveLeftFlag = (pcCUAboveLeft ? true : false);
  }
  return bAboveLeftFlag;
}

Int TComPattern::isAboveAvailable( TComDataCU* pcCU, UInt uiPartIdxLT, UInt uiPartIdxRT, Bool *bValidFlags )
{
  const UInt uiRasterPartBegin = g_auiZscanToRaster[uiPartIdxLT];
  const UInt uiRasterPartEnd = g_auiZscanToRaster[uiPartIdxRT]+1;
  const UInt uiIdxStep = 1;
  Bool *pbValidFlags = bValidFlags;
  Int iNumIntra = 0;

  for ( UInt uiRasterPart = uiRasterPartBegin; uiRasterPart < uiRasterPartEnd; uiRasterPart += uiIdxStep )
  {
    UInt uiPartAbove;
    TComDataCU* pcCUAbove = pcCU->getPUAbove( uiPartAbove, g_auiRasterToZscan[uiRasterPart] );
    if(pcCU->getSlice()->getPPS()->getConstrainedIntraPred())
    {
      if ( pcCUAbove && pcCUAbove->getPredictionMode( uiPartAbove ) == MODE_INTRA )
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    else
    {
      if (pcCUAbove)
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    pbValidFlags++;
  }
  return iNumIntra;
}

Int TComPattern::isLeftAvailable( TComDataCU* pcCU, UInt uiPartIdxLT, UInt uiPartIdxLB, Bool *bValidFlags )
{
  const UInt uiRasterPartBegin = g_auiZscanToRaster[uiPartIdxLT];
  const UInt uiRasterPartEnd = g_auiZscanToRaster[uiPartIdxLB]+1;
  const UInt uiIdxStep = pcCU->getPic()->getNumPartInWidth();
  Bool *pbValidFlags = bValidFlags;
  Int iNumIntra = 0;

  for ( UInt uiRasterPart = uiRasterPartBegin; uiRasterPart < uiRasterPartEnd; uiRasterPart += uiIdxStep )
  {
    UInt uiPartLeft;
    TComDataCU* pcCULeft = pcCU->getPULeft( uiPartLeft, g_auiRasterToZscan[uiRasterPart] );
    if(pcCU->getSlice()->getPPS()->getConstrainedIntraPred())
    {
      if ( pcCULeft && pcCULeft->getPredictionMode( uiPartLeft ) == MODE_INTRA )
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    else
    {
      if ( pcCULeft )
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    pbValidFlags--; // opposite direction
  }

  return iNumIntra;
}

Int TComPattern::isAboveRightAvailable( TComDataCU* pcCU, UInt uiPartIdxLT, UInt uiPartIdxRT, Bool *bValidFlags )
{
  const UInt uiNumUnitsInPU = g_auiZscanToRaster[uiPartIdxRT] - g_auiZscanToRaster[uiPartIdxLT] + 1;
  Bool *pbValidFlags = bValidFlags;
  Int iNumIntra = 0;

  for ( UInt uiOffset = 1; uiOffset <= uiNumUnitsInPU; uiOffset++ )
  {
    UInt uiPartAboveRight;
    TComDataCU* pcCUAboveRight = pcCU->getPUAboveRightAdi( uiPartAboveRight, uiPartIdxRT, uiOffset );
    if(pcCU->getSlice()->getPPS()->getConstrainedIntraPred())
    {
      if ( pcCUAboveRight && pcCUAboveRight->getPredictionMode( uiPartAboveRight ) == MODE_INTRA )
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    else
    {
      if ( pcCUAboveRight )
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    pbValidFlags++;
  }

  return iNumIntra;
}

Int TComPattern::isBelowLeftAvailable( TComDataCU* pcCU, UInt uiPartIdxLT, UInt uiPartIdxLB, Bool *bValidFlags )
{
  const UInt uiNumUnitsInPU = (g_auiZscanToRaster[uiPartIdxLB] - g_auiZscanToRaster[uiPartIdxLT]) / pcCU->getPic()->getNumPartInWidth() + 1;
  Bool *pbValidFlags = bValidFlags;
  Int iNumIntra = 0;

  for ( UInt uiOffset = 1; uiOffset <= uiNumUnitsInPU; uiOffset++ )
  {
    UInt uiPartBelowLeft;
    TComDataCU* pcCUBelowLeft = pcCU->getPUBelowLeftAdi( uiPartBelowLeft, uiPartIdxLB, uiOffset );
    if(pcCU->getSlice()->getPPS()->getConstrainedIntraPred())
    {
      if ( pcCUBelowLeft && pcCUBelowLeft->getPredictionMode( uiPartBelowLeft ) == MODE_INTRA )
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    else
    {
      if ( pcCUBelowLeft )
      {
        iNumIntra++;
        *pbValidFlags = true;
      }
      else
      {
        *pbValidFlags = false;
      }
    }
    pbValidFlags--; // opposite direction
  }

  return iNumIntra;
}
//! \}