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

NOTE - One of the two copyright statements below may be chosen
       that applies for the software.

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

This software module was originally developed by

Heiko Schwarz    (Fraunhofer HHI),
Tobias Hinz      (Fraunhofer HHI),
Karsten Suehring (Fraunhofer HHI)

in the course of development of the ISO/IEC 14496-10:2005 Amd.1 (Scalable Video
Coding) for reference purposes and its performance may not have been optimized.
This software module is an implementation of one or more tools as specified by
the ISO/IEC 14496-10:2005 Amd.1 (Scalable Video Coding).

Those intending to use this software module in products are advised that its
use may infringe existing patents. ISO/IEC have no liability for use of this
software module or modifications thereof.

Assurance that the originally developed software module can be used
(1) in the ISO/IEC 14496-10:2005 Amd.1 (Scalable Video Coding) once the
ISO/IEC 14496-10:2005 Amd.1 (Scalable Video Coding) has been adopted; and
(2) to develop the ISO/IEC 14496-10:2005 Amd.1 (Scalable Video Coding): 

To the extent that Fraunhofer HHI owns patent rights that would be required to
make, use, or sell the originally developed software module or portions thereof
included in the ISO/IEC 14496-10:2005 Amd.1 (Scalable Video Coding) in a
conforming product, Fraunhofer HHI will assure the ISO/IEC that it is willing
to negotiate licenses under reasonable and non-discriminatory terms and
conditions with applicants throughout the world.

Fraunhofer HHI retains full right to modify and use the code for its own
purpose, assign or donate the code to a third party and to inhibit third
parties from using the code for products that do not conform to MPEG-related
ITU Recommendations and/or ISO/IEC International Standards. 

This copyright notice must be included in all copies or derivative works.
Copyright (c) ISO/IEC 2005. 

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

COPYRIGHT AND WARRANTY INFORMATION

Copyright 2005, International Telecommunications Union, Geneva

The Fraunhofer HHI hereby donate this source code to the ITU, with the following
understanding:
    1. Fraunhofer HHI retain the right to do whatever they wish with the
       contributed source code, without limit.
    2. Fraunhofer HHI retain full patent rights (if any exist) in the technical
       content of techniques and algorithms herein.
    3. The ITU shall make this code available to anyone, free of license or
       royalty fees.

DISCLAIMER OF WARRANTY

These software programs are available to the user without any license fee or
royalty on an "as is" basis. The ITU disclaims any and all warranties, whether
express, implied, or statutory, including any implied warranties of
merchantability or of fitness for a particular purpose. In no event shall the
contributor or the ITU be liable for any incidental, punitive, or consequential
damages of any kind whatsoever arising from the use of these programs.

This disclaimer of warranty extends to the user of these programs and user's
customers, employees, agents, transferees, successors, and assigns.

The ITU does not represent or warrant that the programs furnished hereunder are
free of infringement of any third-party patents. Commercial implementations of
ITU-T Recommendations, including shareware, may be subject to royalty fees to
patent holders. Information regarding the ITU-T patent policy is available from 
the ITU Web site at http://www.itu.int.

THIS IS NOT A GRANT OF PATENT RIGHTS - SEE THE ITU-T PATENT POLICY.

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






#if !defined(AFX_INVERSETRANSFORM_H__B2D732EC_10EA_4C2F_9387_4456CFCA4439__INCLUDED_)
#define AFX_INVERSETRANSFORM_H__B2D732EC_10EA_4C2F_9387_4456CFCA4439__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "H264AVCCommonLib/Quantizer.h"
#include "H264AVCCommonLib/YuvMbBuffer.h"
#include "H264AVCCommonLib/IntYuvMbBuffer.h"

H264AVC_NAMESPACE_BEGIN


class H264AVCCOMMONLIB_API Transform :
public Quantizer
{
protected:
	Transform();
	virtual ~Transform();

public:
  static ErrVal create( Transform*& rpcTransform );
  ErrVal destroy();
  Void setClipMode( Bool bEnableClip ) { m_bClip = bEnableClip; }

  Bool getClipMode()                   { return m_bClip; }
  Void e4x4Trafo          ( XPel*               pOrg,
                            Int                 iStride,
                            TCoeff*             piCoeff )
  {
    x4x4Trafo( pOrg, iStride, piCoeff );
  }

  Void e4x4InverseTrafo   ( XPel*               pOrg,
                            Int                 iStride,
                            TCoeff*             piCoeff )
  {
    x4x4InverseTrafo( pOrg, iStride, piCoeff );
  }

  Void eForTransformChromaDc    ( TCoeff* piCoeff )
  {
    xForTransformChromaDc( piCoeff );
  }

  Void eForTransformLumaDc      ( TCoeff* piCoeff )
  {
    xForTransformLumaDc( piCoeff );
  }

  Void e8x8Trafo                ( XPel*               pOrg, 
                                  Int                 iStride,
                                  TCoeff*             piCoeff )
  {
    x8x8Trafo( pOrg, iStride, piCoeff );
  }

  Void e8x8InverseTrafo         ( XPel*               pOrg, 
                                  Int                 iStride,
                                  TCoeff*             piCoeff )
  {
    Int i, j;

    // pOrg is used as predictor in the function
    for( i = 0; i < 8; i ++ )
    {
      for( j = 0; j < 8; j ++ )
        pOrg[i * iStride + j] = 0;
    }

    invTransform8x8Blk( pOrg, iStride, piCoeff );
  }

  ErrVal        transform8x8Blk           ( IntYuvMbBuffer* pcOrgData, IntYuvMbBuffer* pcPelData, TCoeff* piCoeff, const UChar* pucScale, UInt& ruiAbsSum );
  ErrVal        transform4x4Blk           ( IntYuvMbBuffer* pcOrgData, IntYuvMbBuffer* pcPelData, TCoeff* piCoeff, const UChar* pucScale, UInt& ruiAbsSum );
  ErrVal        transformMb16x16          ( IntYuvMbBuffer* pcOrgData, IntYuvMbBuffer* pcPelData, TCoeff* piCoeff, const UChar* pucScale, UInt& ruiDcAbs,  UInt& ruiAcAbs );
  ErrVal        transformChromaBlocks     ( XPel* pucOrg, XPel* pucRec, Int iStride, TCoeff* piCoeff, TCoeff* piQuantCoeff, const UChar* pucScale, UInt& ruiDcAbs, UInt& ruiAcAbs );

  ErrVal        invTransform8x8Blk        ( XPel* puc, Int iStride, TCoeff* piCoeff );
  ErrVal        invTransform4x4Blk        ( XPel* puc, Int iStride, TCoeff* piCoeff );
  ErrVal        invTransformChromaBlocks  ( XPel* puc, Int iStride, TCoeff* piCoeff );
  
  ErrVal        invTransform4x4Blk        ( Pel*  puc, Int iStride, TCoeff* piCoeff );
  ErrVal        invTransformChromaBlocks  ( Pel*  puc, Int iStride, TCoeff* piCoeff );
  
  ErrVal        invTransformDcCoeff       ( TCoeff* piCoeff, Int iQpScale );
  static Void   invTransformChromaDc      ( TCoeff* piCoeff, const Int iQpScale, const Int iShift );


  ErrVal        transformMb               ( TCoeff*         piCoeff,
                                            IntYuvMbBuffer& rcYuvMbBuffer,
                                            Int             iQpLuma,
                                            Int             iQpChroma,
                                            Int             iQuantOffsetDiv );
  ErrVal        inverseTransformMb        ( IntYuvMbBuffer& rcYuvMbBuffer,
                                            TCoeff*         piCoeff,
                                            Int             iQpLuma,
                                            Int             iQpChroma );

  ErrVal        requant4x4Block           ( IntYuvMbBuffer& rcResData,
                                            TCoeff*         piCoeff,
                                            TCoeff*         piCoeffBase,
                                            const UChar*    pucScale,
                                            Bool            bFirstIsDc,
                                            UInt&           ruiAbsSum );
  ErrVal        requantLumaDcCoeffs       ( TCoeff*         piCoeff,
                                            TCoeff*         piCoeffBase,
                                            const UChar*    pucScale,
                                            UInt&           ruiAbsSum );
  ErrVal        requant8x8Block           ( IntYuvMbBuffer& rcResData,
                                            TCoeff*         piCoeff,
                                            TCoeff*         piCoeffBase,
                                            const UChar*    pucScale,
                                            UInt&           ruiAbsSum );
  ErrVal        requantChroma             ( IntYuvMbBuffer& rcResData,
                                            TCoeff*         piCoeff,
                                            TCoeff*         piCoeffBase,
                                            const UChar*    pucScaleU,
                                            const UChar*    pucScaleV,
                                            UInt&           ruiDcAbs,
                                            UInt&           ruiAcAbs );


private:
  Void xForTransform8x8Blk      ( XPel* pucOrg, XPel* pucRec, Int iStride, TCoeff* piPredCoeff );
  Void xForTransform4x4Blk      ( XPel* pucOrg, XPel* pucRec, Int iStride, TCoeff* piPredCoeff );
  
  Void xInvTransform4x4Blk      ( XPel* puc, Int iStride, TCoeff* piCoeff );
  Void xInvTransform4x4Blk      ( Pel*  puc, Int iStride, TCoeff* piCoeff );
  
  Void xInvTransform4x4BlkNoAc  ( XPel* puc, Int iStride, TCoeff* piCoeff );
  Void xInvTransform4x4BlkNoAc  ( Pel*  puc, Int iStride, TCoeff* piCoeff );

  Void xForTransformChromaDc    ( TCoeff* piCoeff );
  Void xForTransformLumaDc      ( TCoeff* piCoeff );
  
  Int  xRound                   ( Int i     )             { return ((i)+(1<<5))>>6; }
  Int  xClip                    ( Int iPel  )             { return ( m_bClip ? gClip( iPel ) : iPel); }

  Void xQuantDequantUniform8x8      ( TCoeff* piQCoeff, TCoeff* piCoeff, const QpParameter& rcQp, const UChar* pucScale, UInt& ruiAbsSum );
  Void xQuantDequantUniform4x4      ( TCoeff* piQCoeff, TCoeff* piCoeff, const QpParameter& rcQp, const UChar* pucScale, UInt& ruiAbsSum );
  Void xQuantDequantNonUniformLuma  ( TCoeff* piQCoeff, TCoeff* piCoeff, const QpParameter& rcQp, const UChar* pucScale, UInt& ruiDcAbs, UInt& ruiAcAbs );
  Void xQuantDequantNonUniformChroma( TCoeff* piQCoeff, TCoeff* piCoeff, const QpParameter& rcQp, const UChar* pucScale, UInt& ruiDcAbs, UInt& ruiAcAbs );

  Void x4x4Trafo          ( XPel*               pOrg,
                            Int                 iStride,
                            TCoeff*             piCoeff );
  Void x4x4InverseTrafo   ( XPel*               pOrg,
                            Int                 iStride,
                            TCoeff*             piCoeff );
  Void x4x4Quant          ( TCoeff*             piQCoeff,
                            TCoeff*             piCoeff,
                            const QpParameter&  rcQp );
  Void x4x4Dequant        ( TCoeff*             piQCoeff,
                            TCoeff*             piCoeff,
                            const QpParameter&  rcQp );

  Void x8x8Trafo                ( XPel*               pOrg, 
                                  Int                 iStride,
                                  TCoeff*             piCoeff );
  Void xRequantUniform4x4       ( TCoeff*             piCoeff,
                                  TCoeff*             piCoeffBase,
                                  const QpParameter&  rcQp,
                                  const UChar*        pucScale,
                                  UInt&               ruiAbsSum );
  Void xRequantUniform8x8       ( TCoeff*             piCoeff,
                                  TCoeff*             piCoeffBase,
                                  const QpParameter&  rcQp,
                                  const UChar*        pucScale,
                                  UInt&               ruiAbsSum );
  Void xRequantNonUniformChroma ( TCoeff*             piCoeff,
                                  TCoeff*             piCoeffBase,
                                  const QpParameter&  rcQp,
                                  const UChar*        pucScale,
                                  UInt&               ruiDcAbs,
                                  UInt&               ruiAcAbs );

protected:
  const SliceHeader*  m_pcSliceHeader;
  Bool                m_bClip;
};


H264AVC_NAMESPACE_END

#endif // !defined(AFX_INVERSETRANSFORM_H__B2D732EC_10EA_4C2F_9387_4456CFCA4439__INCLUDED_)
