[5] | 1 | /* The copyright in this software is being made available under the BSD |
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| 2 | * License, included below. This software may be subject to other third party |
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| 3 | * and contributor rights, including patent rights, and no such rights are |
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[56] | 4 | * granted under this license. |
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[5] | 5 | * |
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[608] | 6 | * Copyright (c) 2010-2013, ITU/ISO/IEC |
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[5] | 7 | * All rights reserved. |
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| 8 | * |
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| 9 | * Redistribution and use in source and binary forms, with or without |
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| 10 | * modification, are permitted provided that the following conditions are met: |
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| 11 | * |
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| 12 | * * Redistributions of source code must retain the above copyright notice, |
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| 13 | * this list of conditions and the following disclaimer. |
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| 14 | * * Redistributions in binary form must reproduce the above copyright notice, |
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| 15 | * this list of conditions and the following disclaimer in the documentation |
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| 16 | * and/or other materials provided with the distribution. |
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[56] | 17 | * * Neither the name of the ITU/ISO/IEC nor the names of its contributors may |
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[5] | 18 | * be used to endorse or promote products derived from this software without |
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| 19 | * specific prior written permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 22 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS |
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| 25 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
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| 31 | * THE POSSIBILITY OF SUCH DAMAGE. |
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| 32 | */ |
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[2] | 33 | |
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[608] | 34 | /** \file WeightPredAnalysis.cpp |
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| 35 | \brief weighted prediction encoder class |
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[2] | 36 | */ |
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| 37 | |
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| 38 | #include "../TLibCommon/TypeDef.h" |
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| 39 | #include "../TLibCommon/TComSlice.h" |
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| 40 | #include "../TLibCommon/TComPic.h" |
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| 41 | #include "../TLibCommon/TComPicYuv.h" |
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| 42 | #include "WeightPredAnalysis.h" |
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| 43 | |
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| 44 | #define ABS(a) ((a) < 0 ? - (a) : (a)) |
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[56] | 45 | #define DTHRESH (0.99) |
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[2] | 46 | |
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| 47 | WeightPredAnalysis::WeightPredAnalysis() |
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| 48 | { |
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[608] | 49 | m_weighted_pred_flag = false; |
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| 50 | m_weighted_bipred_flag = false; |
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[56] | 51 | for ( Int iList =0 ; iList<2 ; iList++ ) |
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| 52 | { |
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| 53 | for ( Int iRefIdx=0 ; iRefIdx<MAX_NUM_REF ; iRefIdx++ ) |
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| 54 | { |
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[608] | 55 | for ( Int comp=0 ; comp<3 ;comp++ ) |
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[56] | 56 | { |
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| 57 | wpScalingParam *pwp = &(m_wp[iList][iRefIdx][comp]); |
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[2] | 58 | pwp->bPresentFlag = false; |
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| 59 | pwp->uiLog2WeightDenom = 0; |
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| 60 | pwp->iWeight = 1; |
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| 61 | pwp->iOffset = 0; |
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| 62 | } |
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| 63 | } |
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[56] | 64 | } |
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[2] | 65 | } |
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| 66 | |
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[56] | 67 | /** calculate AC and DC values for current original image |
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| 68 | * \param TComSlice *slice |
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| 69 | * \returns Void |
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| 70 | */ |
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[2] | 71 | Bool WeightPredAnalysis::xCalcACDCParamSlice(TComSlice *slice) |
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| 72 | { |
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| 73 | //===== calculate AC/DC value ===== |
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| 74 | TComPicYuv* pPic = slice->getPic()->getPicYuvOrg(); |
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| 75 | Int iSample = 0; |
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| 76 | |
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| 77 | // calculate DC/AC value for Y |
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| 78 | Pel* pOrg = pPic->getLumaAddr(); |
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| 79 | Int64 iOrgDCY = xCalcDCValueSlice(slice, pOrg, &iSample); |
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| 80 | Int64 iOrgNormDCY = ((iOrgDCY+(iSample>>1)) / iSample); |
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| 81 | pOrg = pPic->getLumaAddr(); |
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| 82 | Int64 iOrgACY = xCalcACValueSlice(slice, pOrg, iOrgNormDCY); |
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| 83 | |
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| 84 | // calculate DC/AC value for Cb |
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| 85 | pOrg = pPic->getCbAddr(); |
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| 86 | Int64 iOrgDCCb = xCalcDCValueUVSlice(slice, pOrg, &iSample); |
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| 87 | Int64 iOrgNormDCCb = ((iOrgDCCb+(iSample>>1)) / (iSample)); |
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| 88 | pOrg = pPic->getCbAddr(); |
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| 89 | Int64 iOrgACCb = xCalcACValueUVSlice(slice, pOrg, iOrgNormDCCb); |
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| 90 | |
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| 91 | // calculate DC/AC value for Cr |
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| 92 | pOrg = pPic->getCrAddr(); |
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| 93 | Int64 iOrgDCCr = xCalcDCValueUVSlice(slice, pOrg, &iSample); |
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| 94 | Int64 iOrgNormDCCr = ((iOrgDCCr+(iSample>>1)) / (iSample)); |
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| 95 | pOrg = pPic->getCrAddr(); |
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| 96 | Int64 iOrgACCr = xCalcACValueUVSlice(slice, pOrg, iOrgNormDCCr); |
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| 97 | |
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| 98 | wpACDCParam weightACDCParam[3]; |
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| 99 | weightACDCParam[0].iAC = iOrgACY; |
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| 100 | weightACDCParam[0].iDC = iOrgNormDCY; |
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| 101 | weightACDCParam[1].iAC = iOrgACCb; |
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| 102 | weightACDCParam[1].iDC = iOrgNormDCCb; |
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| 103 | weightACDCParam[2].iAC = iOrgACCr; |
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| 104 | weightACDCParam[2].iDC = iOrgNormDCCr; |
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| 105 | |
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| 106 | slice->setWpAcDcParam(weightACDCParam); |
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| 107 | return (true); |
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| 108 | } |
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[56] | 109 | |
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| 110 | /** store weighted_pred_flag and weighted_bipred_idc values |
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| 111 | * \param weighted_pred_flag |
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| 112 | * \param weighted_bipred_idc |
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| 113 | * \returns Void |
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| 114 | */ |
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[608] | 115 | Void WeightPredAnalysis::xStoreWPparam(Bool weighted_pred_flag, Bool weighted_bipred_flag) |
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[56] | 116 | { |
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| 117 | m_weighted_pred_flag = weighted_pred_flag; |
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[608] | 118 | m_weighted_bipred_flag = weighted_bipred_flag; |
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[56] | 119 | } |
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| 120 | |
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| 121 | /** restore weighted_pred_flag and weighted_bipred_idc values |
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| 122 | * \param TComSlice *slice |
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| 123 | * \returns Void |
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| 124 | */ |
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| 125 | Void WeightPredAnalysis::xRestoreWPparam(TComSlice *slice) |
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| 126 | { |
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| 127 | slice->getPPS()->setUseWP(m_weighted_pred_flag); |
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[608] | 128 | slice->getPPS()->setWPBiPred(m_weighted_bipred_flag); |
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[56] | 129 | } |
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| 130 | |
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| 131 | /** check weighted pred or non-weighted pred |
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| 132 | * \param TComSlice *slice |
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| 133 | * \returns Void |
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| 134 | */ |
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| 135 | Void WeightPredAnalysis::xCheckWPEnable(TComSlice *slice) |
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| 136 | { |
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| 137 | Int iPresentCnt = 0; |
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| 138 | for ( Int iList=0 ; iList<2 ; iList++ ) |
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| 139 | { |
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| 140 | for ( Int iRefIdx=0 ; iRefIdx<MAX_NUM_REF ; iRefIdx++ ) |
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| 141 | { |
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| 142 | for ( Int iComp=0 ; iComp<3 ;iComp++ ) |
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| 143 | { |
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| 144 | wpScalingParam *pwp = &(m_wp[iList][iRefIdx][iComp]); |
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| 145 | iPresentCnt += (Int)pwp->bPresentFlag; |
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| 146 | } |
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| 147 | } |
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| 148 | } |
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| 149 | |
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| 150 | if(iPresentCnt==0) |
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| 151 | { |
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| 152 | slice->getPPS()->setUseWP(false); |
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[608] | 153 | slice->getPPS()->setWPBiPred(false); |
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[56] | 154 | for ( Int iList=0 ; iList<2 ; iList++ ) |
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| 155 | { |
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| 156 | for ( Int iRefIdx=0 ; iRefIdx<MAX_NUM_REF ; iRefIdx++ ) |
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| 157 | { |
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| 158 | for ( Int iComp=0 ; iComp<3 ;iComp++ ) |
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| 159 | { |
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| 160 | wpScalingParam *pwp = &(m_wp[iList][iRefIdx][iComp]); |
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| 161 | pwp->bPresentFlag = false; |
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| 162 | pwp->uiLog2WeightDenom = 0; |
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| 163 | pwp->iWeight = 1; |
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| 164 | pwp->iOffset = 0; |
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| 165 | } |
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| 166 | } |
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| 167 | } |
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| 168 | slice->setWpScaling( m_wp ); |
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| 169 | } |
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| 170 | } |
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| 171 | |
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| 172 | /** estimate wp tables for explicit wp |
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| 173 | * \param TComSlice *slice |
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| 174 | * \returns Bool |
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| 175 | */ |
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[2] | 176 | Bool WeightPredAnalysis::xEstimateWPParamSlice(TComSlice *slice) |
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| 177 | { |
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| 178 | Int iDenom = 6; |
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[608] | 179 | Bool validRangeFlag = false; |
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[2] | 180 | |
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| 181 | if(slice->getNumRefIdx(REF_PIC_LIST_0)>3) |
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| 182 | { |
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| 183 | iDenom = 7; |
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| 184 | } |
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[608] | 185 | |
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| 186 | do |
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| 187 | { |
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| 188 | validRangeFlag = xUpdatingWPParameters(slice, m_wp, iDenom); |
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| 189 | if (!validRangeFlag) |
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| 190 | { |
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| 191 | iDenom--; // decrement to satisfy the range limitation |
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| 192 | } |
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| 193 | } while (validRangeFlag == false); |
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| 194 | |
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| 195 | // selecting whether WP is used, or not |
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| 196 | xSelectWP(slice, m_wp, iDenom); |
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[2] | 197 | |
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[608] | 198 | slice->setWpScaling( m_wp ); |
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| 199 | |
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| 200 | return (true); |
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| 201 | } |
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| 202 | |
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| 203 | /** update wp tables for explicit wp w.r.t ramge limitation |
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| 204 | * \param TComSlice *slice |
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| 205 | * \returns Bool |
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| 206 | */ |
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| 207 | Bool WeightPredAnalysis::xUpdatingWPParameters(TComSlice *slice, wpScalingParam weightPredTable[2][MAX_NUM_REF][3], Int log2Denom) |
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| 208 | { |
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| 209 | Int numPredDir = slice->isInterP() ? 1 : 2; |
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| 210 | for ( Int refList = 0; refList < numPredDir; refList++ ) |
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[2] | 211 | { |
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[608] | 212 | RefPicList eRefPicList = ( refList ? REF_PIC_LIST_1 : REF_PIC_LIST_0 ); |
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| 213 | for ( Int refIdxTemp = 0; refIdxTemp < slice->getNumRefIdx(eRefPicList); refIdxTemp++ ) |
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[2] | 214 | { |
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[608] | 215 | wpACDCParam *currWeightACDCParam, *refWeightACDCParam; |
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| 216 | slice->getWpAcDcParam(currWeightACDCParam); |
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| 217 | slice->getRefPic(eRefPicList, refIdxTemp)->getSlice(0)->getWpAcDcParam(refWeightACDCParam); |
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[2] | 218 | |
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[608] | 219 | for ( Int comp = 0; comp < 3; comp++ ) |
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[2] | 220 | { |
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[608] | 221 | Int bitDepth = comp ? g_bitDepthC : g_bitDepthY; |
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| 222 | Int realLog2Denom = log2Denom + bitDepth-8; |
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| 223 | Int realOffset = ((Int)1<<(realLog2Denom-1)); |
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| 224 | |
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[2] | 225 | // current frame |
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[608] | 226 | Int64 currDC = currWeightACDCParam[comp].iDC; |
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| 227 | Int64 currAC = currWeightACDCParam[comp].iAC; |
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[2] | 228 | // reference frame |
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[608] | 229 | Int64 refDC = refWeightACDCParam[comp].iDC; |
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| 230 | Int64 refAC = refWeightACDCParam[comp].iAC; |
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[2] | 231 | |
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[56] | 232 | // calculating iWeight and iOffset params |
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[608] | 233 | Double dWeight = (refAC==0) ? (Double)1.0 : Clip3( -16.0, 15.0, ((Double)currAC / (Double)refAC) ); |
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| 234 | Int weight = (Int)( 0.5 + dWeight * (Double)(1<<log2Denom) ); |
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| 235 | Int offset = (Int)( ((currDC<<log2Denom) - ((Int64)weight * refDC) + (Int64)realOffset) >> realLog2Denom ); |
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[2] | 236 | |
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[608] | 237 | // Chroma offset range limitation |
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| 238 | if(comp) |
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| 239 | { |
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| 240 | Int pred = ( 128 - ( ( 128*weight)>>(log2Denom) ) ); |
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| 241 | Int deltaOffset = Clip3( -512, 511, (offset - pred) ); // signed 10bit |
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| 242 | offset = Clip3( -128, 127, (deltaOffset + pred) ); // signed 8bit |
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| 243 | } |
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| 244 | // Luma offset range limitation |
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| 245 | else |
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| 246 | { |
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| 247 | offset = Clip3( -128, 127, offset); |
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| 248 | } |
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| 249 | |
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| 250 | // Weighting factor limitation |
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| 251 | Int defaultWeight = (1<<log2Denom); |
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| 252 | Int deltaWeight = (defaultWeight - weight); |
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| 253 | if(deltaWeight > 127 || deltaWeight < -128) |
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| 254 | return (false); |
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| 255 | |
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| 256 | m_wp[refList][refIdxTemp][comp].bPresentFlag = true; |
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| 257 | m_wp[refList][refIdxTemp][comp].iWeight = (Int)weight; |
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| 258 | m_wp[refList][refIdxTemp][comp].iOffset = (Int)offset; |
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| 259 | m_wp[refList][refIdxTemp][comp].uiLog2WeightDenom = (Int)log2Denom; |
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[2] | 260 | } |
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| 261 | } |
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| 262 | } |
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| 263 | return (true); |
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| 264 | } |
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[56] | 265 | |
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| 266 | /** select whether weighted pred enables or not. |
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| 267 | * \param TComSlice *slice |
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| 268 | * \param wpScalingParam |
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| 269 | * \param iDenom |
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| 270 | * \returns Bool |
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| 271 | */ |
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| 272 | Bool WeightPredAnalysis::xSelectWP(TComSlice *slice, wpScalingParam weightPredTable[2][MAX_NUM_REF][3], Int iDenom) |
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[2] | 273 | { |
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| 274 | TComPicYuv* pPic = slice->getPic()->getPicYuvOrg(); |
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| 275 | Int iWidth = pPic->getWidth(); |
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| 276 | Int iHeight = pPic->getHeight(); |
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| 277 | Int iDefaultWeight = ((Int)1<<iDenom); |
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| 278 | Int iNumPredDir = slice->isInterP() ? 1 : 2; |
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| 279 | |
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| 280 | for ( Int iRefList = 0; iRefList < iNumPredDir; iRefList++ ) |
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| 281 | { |
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| 282 | Int64 iSADWP = 0, iSADnoWP = 0; |
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| 283 | RefPicList eRefPicList = ( iRefList ? REF_PIC_LIST_1 : REF_PIC_LIST_0 ); |
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| 284 | for ( Int iRefIdxTemp = 0; iRefIdxTemp < slice->getNumRefIdx(eRefPicList); iRefIdxTemp++ ) |
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| 285 | { |
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| 286 | Pel* pOrg = pPic->getLumaAddr(); |
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| 287 | Pel* pRef = slice->getRefPic(eRefPicList, iRefIdxTemp)->getPicYuvRec()->getLumaAddr(); |
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| 288 | Int iOrgStride = pPic->getStride(); |
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| 289 | Int iRefStride = slice->getRefPic(eRefPicList, iRefIdxTemp)->getPicYuvRec()->getStride(); |
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| 290 | |
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| 291 | // calculate SAD costs with/without wp for luma |
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[608] | 292 | iSADWP = this->xCalcSADvalueWP(g_bitDepthY, pOrg, pRef, iWidth, iHeight, iOrgStride, iRefStride, iDenom, weightPredTable[iRefList][iRefIdxTemp][0].iWeight, weightPredTable[iRefList][iRefIdxTemp][0].iOffset); |
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| 293 | iSADnoWP = this->xCalcSADvalueWP(g_bitDepthY, pOrg, pRef, iWidth, iHeight, iOrgStride, iRefStride, iDenom, iDefaultWeight, 0); |
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[2] | 294 | |
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| 295 | pOrg = pPic->getCbAddr(); |
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| 296 | pRef = slice->getRefPic(eRefPicList, iRefIdxTemp)->getPicYuvRec()->getCbAddr(); |
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| 297 | iOrgStride = pPic->getCStride(); |
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| 298 | iRefStride = slice->getRefPic(eRefPicList, iRefIdxTemp)->getPicYuvRec()->getCStride(); |
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| 299 | |
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| 300 | // calculate SAD costs with/without wp for chroma cb |
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[608] | 301 | iSADWP += this->xCalcSADvalueWP(g_bitDepthC, pOrg, pRef, iWidth>>1, iHeight>>1, iOrgStride, iRefStride, iDenom, weightPredTable[iRefList][iRefIdxTemp][1].iWeight, weightPredTable[iRefList][iRefIdxTemp][1].iOffset); |
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| 302 | iSADnoWP += this->xCalcSADvalueWP(g_bitDepthC, pOrg, pRef, iWidth>>1, iHeight>>1, iOrgStride, iRefStride, iDenom, iDefaultWeight, 0); |
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[2] | 303 | |
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| 304 | pOrg = pPic->getCrAddr(); |
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| 305 | pRef = slice->getRefPic(eRefPicList, iRefIdxTemp)->getPicYuvRec()->getCrAddr(); |
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| 306 | |
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| 307 | // calculate SAD costs with/without wp for chroma cr |
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[608] | 308 | iSADWP += this->xCalcSADvalueWP(g_bitDepthC, pOrg, pRef, iWidth>>1, iHeight>>1, iOrgStride, iRefStride, iDenom, weightPredTable[iRefList][iRefIdxTemp][2].iWeight, weightPredTable[iRefList][iRefIdxTemp][2].iOffset); |
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| 309 | iSADnoWP += this->xCalcSADvalueWP(g_bitDepthC, pOrg, pRef, iWidth>>1, iHeight>>1, iOrgStride, iRefStride, iDenom, iDefaultWeight, 0); |
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[2] | 310 | |
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[56] | 311 | Double dRatio = ((Double)iSADWP / (Double)iSADnoWP); |
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| 312 | if(dRatio >= (Double)DTHRESH) |
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[2] | 313 | { |
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| 314 | for ( Int iComp = 0; iComp < 3; iComp++ ) |
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| 315 | { |
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| 316 | weightPredTable[iRefList][iRefIdxTemp][iComp].bPresentFlag = false; |
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| 317 | weightPredTable[iRefList][iRefIdxTemp][iComp].iOffset = (Int)0; |
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| 318 | weightPredTable[iRefList][iRefIdxTemp][iComp].iWeight = (Int)iDefaultWeight; |
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| 319 | weightPredTable[iRefList][iRefIdxTemp][iComp].uiLog2WeightDenom = (Int)iDenom; |
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| 320 | } |
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| 321 | } |
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| 322 | } |
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| 323 | } |
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| 324 | return (true); |
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| 325 | } |
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[56] | 326 | |
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| 327 | /** calculate DC value of original image for luma. |
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| 328 | * \param TComSlice *slice |
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| 329 | * \param Pel *pPel |
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| 330 | * \param Int *iSample |
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| 331 | * \returns Int64 |
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| 332 | */ |
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[2] | 333 | Int64 WeightPredAnalysis::xCalcDCValueSlice(TComSlice *slice, Pel *pPel, Int *iSample) |
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| 334 | { |
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| 335 | TComPicYuv* pPic = slice->getPic()->getPicYuvOrg(); |
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| 336 | Int iStride = pPic->getStride(); |
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| 337 | |
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| 338 | *iSample = 0; |
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| 339 | Int iWidth = pPic->getWidth(); |
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| 340 | Int iHeight = pPic->getHeight(); |
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| 341 | *iSample = iWidth*iHeight; |
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| 342 | Int64 iDC = xCalcDCValue(pPel, iWidth, iHeight, iStride); |
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| 343 | |
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| 344 | return (iDC); |
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| 345 | } |
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[56] | 346 | |
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| 347 | /** calculate AC value of original image for luma. |
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| 348 | * \param TComSlice *slice |
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| 349 | * \param Pel *pPel |
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| 350 | * \param Int iDC |
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| 351 | * \returns Int64 |
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| 352 | */ |
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[2] | 353 | Int64 WeightPredAnalysis::xCalcACValueSlice(TComSlice *slice, Pel *pPel, Int64 iDC) |
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| 354 | { |
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| 355 | TComPicYuv* pPic = slice->getPic()->getPicYuvOrg(); |
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| 356 | Int iStride = pPic->getStride(); |
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| 357 | |
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| 358 | Int iWidth = pPic->getWidth(); |
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| 359 | Int iHeight = pPic->getHeight(); |
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| 360 | Int64 iAC = xCalcACValue(pPel, iWidth, iHeight, iStride, iDC); |
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| 361 | |
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| 362 | return (iAC); |
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| 363 | } |
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| 364 | |
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[56] | 365 | /** calculate DC value of original image for chroma. |
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| 366 | * \param TComSlice *slice |
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| 367 | * \param Pel *pPel |
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| 368 | * \param Int *iSample |
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| 369 | * \returns Int64 |
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| 370 | */ |
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[2] | 371 | Int64 WeightPredAnalysis::xCalcDCValueUVSlice(TComSlice *slice, Pel *pPel, Int *iSample) |
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| 372 | { |
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| 373 | TComPicYuv* pPic = slice->getPic()->getPicYuvOrg(); |
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| 374 | Int iCStride = pPic->getCStride(); |
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| 375 | |
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| 376 | *iSample = 0; |
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| 377 | Int iWidth = pPic->getWidth()>>1; |
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| 378 | Int iHeight = pPic->getHeight()>>1; |
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| 379 | *iSample = iWidth*iHeight; |
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[56] | 380 | Int64 iDC = xCalcDCValue(pPel, iWidth, iHeight, iCStride); |
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[2] | 381 | |
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| 382 | return (iDC); |
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| 383 | } |
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[56] | 384 | |
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| 385 | /** calculate AC value of original image for chroma. |
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| 386 | * \param TComSlice *slice |
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| 387 | * \param Pel *pPel |
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| 388 | * \param Int iDC |
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| 389 | * \returns Int64 |
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| 390 | */ |
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[2] | 391 | Int64 WeightPredAnalysis::xCalcACValueUVSlice(TComSlice *slice, Pel *pPel, Int64 iDC) |
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| 392 | { |
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| 393 | TComPicYuv* pPic = slice->getPic()->getPicYuvOrg(); |
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| 394 | Int iCStride = pPic->getCStride(); |
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| 395 | |
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| 396 | Int iWidth = pPic->getWidth()>>1; |
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| 397 | Int iHeight = pPic->getHeight()>>1; |
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[56] | 398 | Int64 iAC = xCalcACValue(pPel, iWidth, iHeight, iCStride, iDC); |
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[2] | 399 | |
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| 400 | return (iAC); |
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| 401 | } |
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[56] | 402 | |
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| 403 | /** calculate DC value. |
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| 404 | * \param Pel *pPel |
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| 405 | * \param Int iWidth |
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| 406 | * \param Int iHeight |
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| 407 | * \param Int iStride |
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| 408 | * \returns Int64 |
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| 409 | */ |
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[2] | 410 | Int64 WeightPredAnalysis::xCalcDCValue(Pel *pPel, Int iWidth, Int iHeight, Int iStride) |
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| 411 | { |
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| 412 | Int x, y; |
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| 413 | Int64 iDC = 0; |
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| 414 | for( y = 0; y < iHeight; y++ ) |
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| 415 | { |
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| 416 | for( x = 0; x < iWidth; x++ ) |
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| 417 | { |
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| 418 | iDC += (Int)( pPel[x] ); |
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| 419 | } |
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| 420 | pPel += iStride; |
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| 421 | } |
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| 422 | return (iDC); |
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| 423 | } |
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[56] | 424 | |
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| 425 | /** calculate AC value. |
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| 426 | * \param Pel *pPel |
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| 427 | * \param Int iWidth |
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| 428 | * \param Int iHeight |
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| 429 | * \param Int iStride |
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| 430 | * \param Int iDC |
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| 431 | * \returns Int64 |
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| 432 | */ |
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[2] | 433 | Int64 WeightPredAnalysis::xCalcACValue(Pel *pPel, Int iWidth, Int iHeight, Int iStride, Int64 iDC) |
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| 434 | { |
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| 435 | Int x, y; |
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| 436 | Int64 iAC = 0; |
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| 437 | for( y = 0; y < iHeight; y++ ) |
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| 438 | { |
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| 439 | for( x = 0; x < iWidth; x++ ) |
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| 440 | { |
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[56] | 441 | iAC += abs( (Int)pPel[x] - (Int)iDC ); |
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[2] | 442 | } |
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| 443 | pPel += iStride; |
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| 444 | } |
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| 445 | return (iAC); |
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| 446 | } |
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| 447 | |
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[56] | 448 | /** calculate SAD values for both WP version and non-WP version. |
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| 449 | * \param Pel *pOrgPel |
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| 450 | * \param Pel *pRefPel |
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| 451 | * \param Int iWidth |
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| 452 | * \param Int iHeight |
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| 453 | * \param Int iOrgStride |
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| 454 | * \param Int iRefStride |
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| 455 | * \param Int iDenom |
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| 456 | * \param Int iWeight |
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| 457 | * \param Int iOffset |
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| 458 | * \returns Int64 |
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| 459 | */ |
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[608] | 460 | Int64 WeightPredAnalysis::xCalcSADvalueWP(Int bitDepth, Pel *pOrgPel, Pel *pRefPel, Int iWidth, Int iHeight, Int iOrgStride, Int iRefStride, Int iDenom, Int iWeight, Int iOffset) |
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[2] | 461 | { |
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| 462 | Int x, y; |
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| 463 | Int64 iSAD = 0; |
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| 464 | Int64 iSize = iWidth*iHeight; |
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[608] | 465 | Int64 iRealDenom = iDenom + bitDepth-8; |
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[2] | 466 | for( y = 0; y < iHeight; y++ ) |
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| 467 | { |
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| 468 | for( x = 0; x < iWidth; x++ ) |
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| 469 | { |
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| 470 | iSAD += ABS(( ((Int64)pOrgPel[x]<<(Int64)iDenom) - ( (Int64)pRefPel[x] * (Int64)iWeight + ((Int64)iOffset<<iRealDenom) ) ) ); |
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| 471 | } |
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| 472 | pOrgPel += iOrgStride; |
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| 473 | pRefPel += iRefStride; |
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| 474 | } |
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| 475 | return (iSAD/iSize); |
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| 476 | } |
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| 477 | |
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| 478 | |
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