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1 /*****************************************************************************
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2 * Copyright (C) 2015 x265 project
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3 *
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4 * Authors: Steve Borho <steve@borho.org>
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5 *
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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19 *
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20 * This program is also available under a commercial proprietary license.
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21 * For more information, contact us at license @ x265.com.
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22 *****************************************************************************/
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23
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24 #include "common.h"
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25 #include "primitives.h"
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26 #include "scalinglist.h"
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27
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28 namespace {
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29 // file-anonymous namespace
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30
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31 /* Strings for scaling list file parsing */
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32 const char MatrixType[4][6][20] =
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33 {
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34 {
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35 "INTRA4X4_LUMA",
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36 "INTRA4X4_CHROMAU",
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37 "INTRA4X4_CHROMAV",
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38 "INTER4X4_LUMA",
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39 "INTER4X4_CHROMAU",
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40 "INTER4X4_CHROMAV"
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41 },
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42 {
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43 "INTRA8X8_LUMA",
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44 "INTRA8X8_CHROMAU",
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45 "INTRA8X8_CHROMAV",
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46 "INTER8X8_LUMA",
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47 "INTER8X8_CHROMAU",
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48 "INTER8X8_CHROMAV"
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49 },
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50 {
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51 "INTRA16X16_LUMA",
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52 "INTRA16X16_CHROMAU",
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53 "INTRA16X16_CHROMAV",
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54 "INTER16X16_LUMA",
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55 "INTER16X16_CHROMAU",
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56 "INTER16X16_CHROMAV"
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57 },
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58 {
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59 "INTRA32X32_LUMA",
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60 "INTER32X32_LUMA",
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61 },
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62 };
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63 const char MatrixType_DC[4][12][22] =
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64 {
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65 {
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66 },
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67 {
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68 },
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69 {
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70 "INTRA16X16_LUMA_DC",
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71 "INTRA16X16_CHROMAU_DC",
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72 "INTRA16X16_CHROMAV_DC",
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73 "INTER16X16_LUMA_DC",
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74 "INTER16X16_CHROMAU_DC",
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75 "INTER16X16_CHROMAV_DC"
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76 },
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77 {
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78 "INTRA32X32_LUMA_DC",
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79 "INTER32X32_LUMA_DC",
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80 },
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81 };
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82
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83 static int quantTSDefault4x4[16] =
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84 {
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85 16, 16, 16, 16,
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86 16, 16, 16, 16,
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87 16, 16, 16, 16,
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88 16, 16, 16, 16
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89 };
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90
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91 static int quantIntraDefault8x8[64] =
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92 {
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93 16, 16, 16, 16, 17, 18, 21, 24,
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94 16, 16, 16, 16, 17, 19, 22, 25,
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95 16, 16, 17, 18, 20, 22, 25, 29,
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96 16, 16, 18, 21, 24, 27, 31, 36,
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97 17, 17, 20, 24, 30, 35, 41, 47,
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98 18, 19, 22, 27, 35, 44, 54, 65,
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99 21, 22, 25, 31, 41, 54, 70, 88,
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100 24, 25, 29, 36, 47, 65, 88, 115
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101 };
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102
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103 static int quantInterDefault8x8[64] =
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104 {
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105 16, 16, 16, 16, 17, 18, 20, 24,
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106 16, 16, 16, 17, 18, 20, 24, 25,
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107 16, 16, 17, 18, 20, 24, 25, 28,
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108 16, 17, 18, 20, 24, 25, 28, 33,
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109 17, 18, 20, 24, 25, 28, 33, 41,
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110 18, 20, 24, 25, 28, 33, 41, 54,
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111 20, 24, 25, 28, 33, 41, 54, 71,
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112 24, 25, 28, 33, 41, 54, 71, 91
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113 };
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114
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115 }
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116
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117 namespace X265_NS {
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118 // private namespace
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119
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120 const int ScalingList::s_numCoefPerSize[NUM_SIZES] = { 16, 64, 256, 1024 };
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121 const int32_t ScalingList::s_quantScales[NUM_REM] = { 26214, 23302, 20560, 18396, 16384, 14564 };
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122 const int32_t ScalingList::s_invQuantScales[NUM_REM] = { 40, 45, 51, 57, 64, 72 };
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123
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124 ScalingList::ScalingList()
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125 {
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126 memset(m_quantCoef, 0, sizeof(m_quantCoef));
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127 memset(m_dequantCoef, 0, sizeof(m_dequantCoef));
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128 memset(m_scalingListCoef, 0, sizeof(m_scalingListCoef));
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129 }
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130
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131 bool ScalingList::init()
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132 {
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133 bool ok = true;
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134 for (int sizeId = 0; sizeId < NUM_SIZES; sizeId++)
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135 {
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136 for (int listId = 0; listId < NUM_LISTS; listId++)
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137 {
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138 m_scalingListCoef[sizeId][listId] = X265_MALLOC(int32_t, X265_MIN(MAX_MATRIX_COEF_NUM, s_numCoefPerSize[sizeId]));
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139 ok &= !!m_scalingListCoef[sizeId][listId];
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140 for (int rem = 0; rem < NUM_REM; rem++)
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141 {
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142 m_quantCoef[sizeId][listId][rem] = X265_MALLOC(int32_t, s_numCoefPerSize[sizeId]);
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143 m_dequantCoef[sizeId][listId][rem] = X265_MALLOC(int32_t, s_numCoefPerSize[sizeId]);
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144 ok &= m_quantCoef[sizeId][listId][rem] && m_dequantCoef[sizeId][listId][rem];
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145 }
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146 }
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147 }
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148 return ok;
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149 }
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150
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151 ScalingList::~ScalingList()
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152 {
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153 for (int sizeId = 0; sizeId < NUM_SIZES; sizeId++)
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154 {
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155 for (int listId = 0; listId < NUM_LISTS; listId++)
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156 {
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157 X265_FREE(m_scalingListCoef[sizeId][listId]);
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158 for (int rem = 0; rem < NUM_REM; rem++)
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159 {
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160 X265_FREE(m_quantCoef[sizeId][listId][rem]);
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161 X265_FREE(m_dequantCoef[sizeId][listId][rem]);
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162 }
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163 }
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164 }
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165 }
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166
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167 /* returns predicted list index if a match is found, else -1 */
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168 int ScalingList::checkPredMode(int size, int list) const
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169 {
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170 for (int predList = list; predList >= 0; predList--)
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171 {
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172 // check DC value
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173 if (size < BLOCK_16x16 && m_scalingListDC[size][list] != m_scalingListDC[size][predList])
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174 continue;
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175
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176 // check value of matrix
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177 if (!memcmp(m_scalingListCoef[size][list],
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178 list == predList ? getScalingListDefaultAddress(size, predList) : m_scalingListCoef[size][predList],
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179 sizeof(int32_t) * X265_MIN(MAX_MATRIX_COEF_NUM, s_numCoefPerSize[size])))
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180 return predList;
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181 }
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182
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183 return -1;
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184 }
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185
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186 /* check if use default quantization matrix
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187 * returns true if default quantization matrix is used in all sizes */
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188 bool ScalingList::checkDefaultScalingList() const
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189 {
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190 int defaultCounter = 0;
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191
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192 for (int s = 0; s < NUM_SIZES; s++)
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193 for (int l = 0; l < NUM_LISTS; l++)
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194 if (!memcmp(m_scalingListCoef[s][l], getScalingListDefaultAddress(s, l),
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195 sizeof(int32_t) * X265_MIN(MAX_MATRIX_COEF_NUM, s_numCoefPerSize[s])) &&
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196 ((s < BLOCK_16x16) || (m_scalingListDC[s][l] == 16)))
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197 defaultCounter++;
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198
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199 return defaultCounter != (NUM_LISTS * NUM_SIZES - 4); // -4 for 32x32
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200 }
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201
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202 /* get address of default quantization matrix */
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203 const int32_t* ScalingList::getScalingListDefaultAddress(int sizeId, int listId) const
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204 {
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205 switch (sizeId)
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206 {
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207 case BLOCK_4x4:
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208 return quantTSDefault4x4;
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209 case BLOCK_8x8:
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210 return (listId < 3) ? quantIntraDefault8x8 : quantInterDefault8x8;
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211 case BLOCK_16x16:
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212 return (listId < 3) ? quantIntraDefault8x8 : quantInterDefault8x8;
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213 case BLOCK_32x32:
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214 return (listId < 1) ? quantIntraDefault8x8 : quantInterDefault8x8;
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215 default:
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216 break;
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217 }
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218
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219 X265_CHECK(0, "invalid scaling list size\n");
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220 return NULL;
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221 }
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222
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223 void ScalingList::processDefaultMarix(int sizeId, int listId)
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224 {
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225 memcpy(m_scalingListCoef[sizeId][listId], getScalingListDefaultAddress(sizeId, listId), sizeof(int) * X265_MIN(MAX_MATRIX_COEF_NUM, s_numCoefPerSize[sizeId]));
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226 m_scalingListDC[sizeId][listId] = SCALING_LIST_DC;
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227 }
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228
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229 void ScalingList::setDefaultScalingList()
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230 {
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231 for (int sizeId = 0; sizeId < NUM_SIZES; sizeId++)
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232 for (int listId = 0; listId < NUM_LISTS; listId++)
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233 processDefaultMarix(sizeId, listId);
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234 m_bEnabled = true;
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235 m_bDataPresent = false;
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236 }
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237
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238 bool ScalingList::parseScalingList(const char* filename)
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239 {
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240 FILE *fp = fopen(filename, "r");
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241 if (!fp)
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242 {
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243 x265_log(NULL, X265_LOG_ERROR, "can't open scaling list file %s\n", filename);
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244 return true;
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245 }
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246
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247 char line[1024];
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248 int32_t *src = NULL;
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249
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250 for (int sizeIdc = 0; sizeIdc < NUM_SIZES; sizeIdc++)
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251 {
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252 int size = X265_MIN(MAX_MATRIX_COEF_NUM, s_numCoefPerSize[sizeIdc]);
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253 for (int listIdc = 0; listIdc < NUM_LISTS; listIdc++)
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254 {
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255 src = m_scalingListCoef[sizeIdc][listIdc];
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256
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257 fseek(fp, 0, 0);
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258 do
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259 {
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260 char *ret = fgets(line, 1024, fp);
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261 if (!ret || (!strstr(line, MatrixType[sizeIdc][listIdc]) && feof(fp)))
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262 {
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263 x265_log(NULL, X265_LOG_ERROR, "can't read matrix from %s\n", filename);
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264 return true;
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265 }
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266 }
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267 while (!strstr(line, MatrixType[sizeIdc][listIdc]));
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268
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269 for (int i = 0; i < size; i++)
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270 {
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271 int data;
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272 if (fscanf(fp, "%d,", &data) != 1)
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273 {
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274 x265_log(NULL, X265_LOG_ERROR, "can't read matrix from %s\n", filename);
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275 return true;
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276 }
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277 src[i] = data;
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278 }
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279
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280 // set DC value for default matrix check
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281 m_scalingListDC[sizeIdc][listIdc] = src[0];
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282
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283 if (sizeIdc > BLOCK_8x8)
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284 {
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285 fseek(fp, 0, 0);
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286 do
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287 {
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288 char *ret = fgets(line, 1024, fp);
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289 if (!ret || (!strstr(line, MatrixType_DC[sizeIdc][listIdc]) && feof(fp)))
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290 {
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291 x265_log(NULL, X265_LOG_ERROR, "can't read DC from %s\n", filename);
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292 return true;
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293 }
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294 }
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295 while (!strstr(line, MatrixType_DC[sizeIdc][listIdc]));
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296
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297 int data;
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298 if (fscanf(fp, "%d,", &data) != 1)
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299 {
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300 x265_log(NULL, X265_LOG_ERROR, "can't read matrix from %s\n", filename);
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301 return true;
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302 }
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303
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304 // overwrite DC value when size of matrix is larger than 16x16
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305 m_scalingListDC[sizeIdc][listIdc] = data;
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306 }
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307 }
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308 }
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309
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310 fclose(fp);
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311
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312 m_bEnabled = true;
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313 m_bDataPresent = !checkDefaultScalingList();
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314
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315 return false;
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316 }
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317
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318 /** set quantized matrix coefficient for encode */
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319 void ScalingList::setupQuantMatrices()
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320 {
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321 for (int size = 0; size < NUM_SIZES; size++)
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322 {
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323 int width = 1 << (size + 2);
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324 int ratio = width / X265_MIN(MAX_MATRIX_SIZE_NUM, width);
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325 int stride = X265_MIN(MAX_MATRIX_SIZE_NUM, width);
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326 int count = s_numCoefPerSize[size];
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327
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328 for (int list = 0; list < NUM_LISTS; list++)
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329 {
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330 int32_t *coeff = m_scalingListCoef[size][list];
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331 int32_t dc = m_scalingListDC[size][list];
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332
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333 for (int rem = 0; rem < NUM_REM; rem++)
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334 {
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335 int32_t *quantCoeff = m_quantCoef[size][list][rem];
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336 int32_t *dequantCoeff = m_dequantCoef[size][list][rem];
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337
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338 if (m_bEnabled)
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339 {
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340 processScalingListEnc(coeff, quantCoeff, s_quantScales[rem] << 4, width, width, ratio, stride, dc);
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341 processScalingListDec(coeff, dequantCoeff, s_invQuantScales[rem], width, width, ratio, stride, dc);
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342 }
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343 else
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344 {
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345 /* flat quant and dequant coefficients */
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346 for (int i = 0; i < count; i++)
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347 {
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348 quantCoeff[i] = s_quantScales[rem];
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349 dequantCoeff[i] = s_invQuantScales[rem];
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350 }
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351 }
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352 }
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353 }
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354 }
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355 }
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356
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357 void ScalingList::processScalingListEnc(int32_t *coeff, int32_t *quantcoeff, int32_t quantScales, int height, int width,
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358 int ratio, int stride, int32_t dc)
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359 {
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360 for (int j = 0; j < height; j++)
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361 for (int i = 0; i < width; i++)
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362 quantcoeff[j * width + i] = quantScales / coeff[stride * (j / ratio) + i / ratio];
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363
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364 if (ratio > 1)
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365 quantcoeff[0] = quantScales / dc;
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366 }
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367
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368 void ScalingList::processScalingListDec(int32_t *coeff, int32_t *dequantcoeff, int32_t invQuantScales, int height, int width,
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369 int ratio, int stride, int32_t dc)
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370 {
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371 for (int j = 0; j < height; j++)
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372 for (int i = 0; i < width; i++)
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373 dequantcoeff[j * width + i] = invQuantScales * coeff[stride * (j / ratio) + i / ratio];
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374
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375 if (ratio > 1)
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376 dequantcoeff[0] = invQuantScales * dc;
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377 }
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378
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379 }
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