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1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - Initial contribution |
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11 * |
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12 * Contributors: |
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13 * Ixonos Plc |
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14 * |
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15 * Description: |
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16 * Implementation for MPEG4(H263) video transcoder. |
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17 * VLC encoding for RVLC -> VLC AC/DCT coeficients in the transcoder. |
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18 * |
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19 */ |
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20 |
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21 |
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22 #include "biblin.h" |
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23 #include "common.h" |
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24 |
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25 |
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26 /* Run-length coding */ |
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27 typedef struct{ |
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28 int16 run; |
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29 int level; |
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30 int16 last; |
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31 } tEvent; |
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32 |
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33 /* Variable length coding */ |
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34 typedef struct{ |
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35 u_int16 code; |
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36 u_int16 length; |
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37 } tVLCTable; |
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38 |
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39 |
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40 /* |
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41 * Function Declarations |
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42 */ |
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43 int32 vlbPutACCoeffSVH(int32 coeffStart, int16* block, bibBuffer_t * outBuf, |
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44 int32 svh, int32 lastPos); |
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45 int32 vlbPutACVLCCoeff(bibBuffer_t *outBuf, tEvent *event, int32 svh); |
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46 int32 vlbPutDCCoeffCMT(int val, bibBuffer_t * outBuf, int32 blkCnt); |
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47 int32 vlbPutIntraACCoeffCMTDP(bibBuffer_t *outBuf, tEvent *event); |
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48 int32 vlbPutIntraACCoeffCMT(int32 coeffStart, int* block, bibBuffer_t * outBuf); |
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49 void vdtPutBits (void *outBuf, int numBits, unsigned int value); |
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50 |
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51 |
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52 /* |
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53 * Function Definitions |
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54 */ |
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55 |
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56 |
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57 /* {{-output"vlbPutBits.txt"}} */ |
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58 /* |
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59 * vlbPutBits |
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60 * |
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61 * Parameters: |
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62 * outBuf output buffer |
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63 * numBits number of bits to write |
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64 * value value to write |
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65 * |
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66 * Function: |
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67 * This function puts some bits to the output buffer |
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68 * |
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69 * Returns: |
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70 * Nothing. |
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71 * |
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72 * Error codes: |
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73 * None. |
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74 * |
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75 */ |
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76 void vlbPutBits (bibBuffer_t *outBuf, |
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77 int32 numBits, |
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78 u_int32 value) |
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79 { |
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80 // To be compatible with the old codes, I don't change the interface |
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81 vdtPutBits((void *)outBuf, numBits, value); |
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82 } |
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83 |
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84 |
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85 /* |
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86 * Look-up tables |
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87 */ |
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88 |
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89 /* INTRA VLC tables */ |
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90 |
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91 /* run == 0 && level < 28 */ |
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92 const tVLCTable vlbVLCTable1IntraAC[28] = |
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93 { |
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94 {NOT_VALID,NOT_VALID}, {0x04,0x03}, {0x0c,0x04}, |
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95 {0x1e,0x05}, {0x1a,0x06}, {0x18,0x06}, {0x2a,0x07}, |
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96 {0x26,0x07}, {0x24,0x07}, {0x2e,0x08}, {0x3e,0x09}, |
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97 {0x3c,0x09}, {0x3a,0x09}, {0x4a,0x0a}, {0x48,0x0a}, |
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98 {0x46,0x0a}, {0x42,0x0a}, {0x42,0x0b}, {0x40,0x0b}, |
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99 {0x1e,0x0b}, {0x1c,0x0b}, {0x0e,0x0c}, {0x0c,0x0c}, |
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100 {0x40,0x0c}, {0x42,0x0c}, {0xa0,0x0d}, {0xa2,0x0d}, |
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101 {0xa4,0x0d} |
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102 }; |
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103 |
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104 /* run == 1 && level < 11 */ |
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105 const tVLCTable vlbVLCTable2IntraAC[11] = |
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106 { |
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107 {NOT_VALID, NOT_VALID}, {0x1c,0x05}, {0x28,0x07}, |
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108 {0x2c,0x08}, {0x38,0x09}, {0x40,0x0a}, {0x3e,0x0a}, |
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109 {0x1a,0x0b}, {0x44,0x0c}, {0xa6,0x0d}, {0xaa,0x0d} |
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110 }; |
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111 |
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112 /* run == 2 && level < 6 */ |
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113 const tVLCTable vlbVLCTable3IntraAC[6] = |
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114 { |
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115 {NOT_VALID, NOT_VALID}, {0x16,0x06}, {0x2a,0x08}, |
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116 {0x3c,0x0a}, {0x18,0x0b}, {0xac,0x0d} |
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117 }; |
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118 |
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119 /* run == 3 && level < 5 */ |
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120 const tVLCTable vlbVLCTable4IntraAC[5] = |
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121 { |
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122 {NOT_VALID, NOT_VALID}, {0x22,0x07}, {0x36,0x09}, |
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123 {0x3a,0x0a}, {0x16,0x0b} |
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124 }; |
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125 |
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126 /* 4 <= run < 8 && level < 4 */ |
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127 const tVLCTable vlbVLCTable5IntraAC[4][4] = |
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128 { |
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129 { |
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130 {NOT_VALID, NOT_VALID}, {0x20,0x07}, {0x44,0x0a}, |
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131 {0x14,0x0b} |
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132 }, |
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133 { |
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134 {NOT_VALID, NOT_VALID}, {0x1a,0x07}, {0x38,0x0a}, |
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135 {0x10,0x0b} |
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136 }, |
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137 { |
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138 {NOT_VALID, NOT_VALID}, {0x24,0x08}, {0x36,0x0a}, |
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139 {0xa8,0x0d} |
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140 }, |
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141 { |
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142 {NOT_VALID, NOT_VALID}, {0x28,0x08}, {0x34,0x0a}, |
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143 {0xae,0x0d} |
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144 } |
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145 }; |
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146 |
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147 /* 8 <= run < 10 && level < 3 */ |
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148 const tVLCTable vlbVLCTable6IntraAC[2][3] = |
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149 { |
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150 { |
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151 {NOT_VALID, NOT_VALID}, {0x32,0x09}, {0x12,0x0b} |
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152 }, |
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153 { |
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154 {NOT_VALID, NOT_VALID}, {0x30,0x09}, {0x46,0x0c} |
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155 } |
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156 }; |
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157 |
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158 /* 10 <= run < 15 && level < 2 */ |
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159 const tVLCTable vlbVLCTable7IntraAC[5][2] = |
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160 { |
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161 { |
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162 {NOT_VALID, NOT_VALID}, {0x2e,0x09} |
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163 }, |
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164 { |
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165 {NOT_VALID, NOT_VALID}, {0x32,0x0a} |
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166 }, |
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167 { |
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168 {NOT_VALID, NOT_VALID}, {0x30,0x0a} |
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169 }, |
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170 { |
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171 {NOT_VALID, NOT_VALID}, {0x0e,0x0b} |
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172 }, |
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173 { |
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174 {NOT_VALID, NOT_VALID}, {0xb0,0x0d} |
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175 } |
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176 }; |
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177 |
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178 /* run == 0 && level < 9 */ |
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179 const tVLCTable vlbVLCTable8IntraAC[9] = |
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180 { |
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181 {NOT_VALID, NOT_VALID}, {0x0e,0x05}, {0x18,0x07}, |
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182 {0x2c,0x09}, {0x2e,0x0a}, {0x0c,0x0b}, {0x0a,0x0c}, |
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183 {0x08,0x0c}, {0xb2,0x0d} |
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184 }; |
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185 |
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186 /* run == 1 && level < 4 */ |
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187 const tVLCTable vlbVLCTable9IntraAC[4] = |
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188 { |
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189 {NOT_VALID, NOT_VALID}, {0x1e,0x07}, {0x2c,0x0a}, |
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190 {0x0a,0x0b} |
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191 }; |
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192 |
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193 /* 2 <= run < 7 && level < 3 */ |
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194 const tVLCTable vlbVLCTable10IntraAC[5][3] = |
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195 { |
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196 { |
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197 {NOT_VALID, NOT_VALID}, {0x1c,0x07}, {0x08,0x0b} |
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198 }, |
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199 { |
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200 {NOT_VALID, NOT_VALID}, {0x22,0x08}, {0x48,0x0c} |
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201 }, |
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202 { |
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203 {NOT_VALID, NOT_VALID}, {0x20,0x08}, {0x4a,0x0c} |
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204 }, |
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205 { |
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206 {NOT_VALID, NOT_VALID}, {0x26,0x08}, {0xb4,0x0d} |
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207 }, |
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208 { |
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209 {NOT_VALID, NOT_VALID}, {0x2a,0x09}, {0xb6,0x0d} |
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210 } |
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211 }; |
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212 |
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213 /* 7 <= run < 21 && level == 1 */ |
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214 const tVLCTable vlbVLCTable11IntraAC[14][2] = |
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215 { |
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216 { |
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217 {NOT_VALID, NOT_VALID}, {0x28,0x09} |
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218 }, |
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219 { |
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220 {NOT_VALID, NOT_VALID}, {0x26,0x09} |
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221 }, |
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222 { |
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223 {NOT_VALID, NOT_VALID}, {0x34,0x09} |
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224 }, |
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225 { |
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226 {NOT_VALID, NOT_VALID}, {0x2a,0x0a} |
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227 }, |
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228 { |
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229 {NOT_VALID, NOT_VALID}, {0x28,0x0a} |
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230 }, |
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231 { |
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232 {NOT_VALID, NOT_VALID}, {0x26,0x0a} |
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233 }, |
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234 { |
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235 {NOT_VALID, NOT_VALID}, {0x24,0x0a} |
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236 }, |
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237 { |
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238 {NOT_VALID, NOT_VALID}, {0x22,0x0a} |
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239 }, |
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240 { |
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241 {NOT_VALID, NOT_VALID}, {0x4c,0x0c} |
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242 }, |
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243 { |
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244 {NOT_VALID, NOT_VALID}, {0x4e,0x0c} |
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245 }, |
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246 { |
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247 {NOT_VALID, NOT_VALID}, {0xb8,0x0d} |
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248 }, |
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249 { |
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250 {NOT_VALID, NOT_VALID}, {0xba,0x0d} |
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251 }, |
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252 { |
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253 {NOT_VALID, NOT_VALID}, {0xbc,0x0d} |
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254 }, |
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255 { |
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256 {NOT_VALID, NOT_VALID}, {0xbe,0x0d} |
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257 } |
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258 }; |
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259 |
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260 |
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261 /* Inter AC VLC tables */ |
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262 |
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263 const tVLCTable vlbVLCTable1InterAC[13] = |
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264 { |
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265 {NOT_VALID, NOT_VALID}, |
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266 {0x04,0x03}, {0x1e,0x05}, {0x2a,0x07}, {0x2e,0x08}, |
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267 {0x3e,0x09}, {0x4a,0x0a}, {0x48,0x0a}, {0x42,0x0b}, |
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268 {0x40,0x0b}, {0x0e,0x0c}, {0x0c,0x0c}, {0x40,0x0c} |
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269 }; |
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270 |
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271 const tVLCTable vlbVLCTable2InterAC[7] = |
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272 { |
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273 {NOT_VALID, NOT_VALID}, {0x0c,0x04}, {0x28,0x07}, |
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274 {0x3c,0x09}, {0x1e,0x0b}, {0x42,0x0c}, {0xa0,0x0d} |
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275 }; |
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276 |
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277 const tVLCTable vlbVLCTable3InterAC[5] = |
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278 { |
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279 {NOT_VALID, NOT_VALID}, {0x1c,0x05}, {0x3a,0x09}, |
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280 {0x1c,0x0b}, {0xa2,0x0d} |
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281 }; |
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282 |
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283 const tVLCTable vlbVLCTable4InterAC[4][4] = |
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284 { |
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285 { |
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286 {NOT_VALID, NOT_VALID}, {0x1a,0x06}, {0x46,0x0a}, |
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287 {0x1a,0x0b} |
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288 }, |
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289 { |
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290 {NOT_VALID, NOT_VALID}, {0x18,0x06}, {0x44,0x0a}, |
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291 {0xa4,0x0d} |
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292 }, |
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293 { |
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294 {NOT_VALID, NOT_VALID}, {0x16,0x06}, {0x18,0x0b}, |
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295 {0xa6,0x0d} |
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296 }, |
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297 { |
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298 {NOT_VALID, NOT_VALID}, {0x26,0x07}, {0x16,0x0b}, |
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299 {0xa8,0x0d} |
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300 } |
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301 }; |
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302 |
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303 const tVLCTable vlbVLCTable5InterAC[4][3] = |
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304 { |
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305 { |
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306 {NOT_VALID, NOT_VALID}, {0x24,0x07}, {0x14,0x0b} |
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307 }, |
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308 { |
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309 {NOT_VALID, NOT_VALID}, {0x22,0x07}, {0x12,0x0b} |
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310 }, |
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311 { |
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312 {NOT_VALID, NOT_VALID}, {0x20,0x07}, {0x10,0x0b} |
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313 }, |
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314 { |
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315 {NOT_VALID, NOT_VALID}, {0x2c,0x08}, {0xaa,0x0d} |
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316 } |
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317 }; |
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318 |
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319 const tVLCTable vlbVLCTable6InterAC[16] = |
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320 { |
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321 {0x2a,0x08}, {0x28,0x08}, {0x38,0x09}, {0x36,0x09}, |
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322 {0x42,0x0a}, {0x40,0x0a}, {0x3e,0x0a}, {0x3c,0x0a}, |
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323 {0x3a,0x0a}, {0x38,0x0a}, {0x36,0x0a}, {0x34,0x0a}, |
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324 {0x44,0x0c}, {0x46,0x0c}, {0xac,0x0d}, {0xae,0x0d} |
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325 }; |
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326 |
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327 const tVLCTable vlbVLCTable7InterAc[4] = |
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328 { |
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329 {NOT_VALID, NOT_VALID}, {0x0e,0x05}, {0x32,0x0a}, |
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330 {0x0a,0x0c} |
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331 }; |
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332 |
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333 const tVLCTable vlbVLCTable8InterAC[3] = |
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334 { |
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335 {NOT_VALID, NOT_VALID}, {0x1e,0x07}, {0x08,0x0c} |
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336 }; |
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337 |
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338 const tVLCTable vlbVLCTable9InterAC[39] = |
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339 { |
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340 {0x1c,0x07}, {0x1a,0x07}, {0x18,0x07}, {0x26,0x08}, |
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341 {0x24,0x08}, {0x22,0x08}, {0x20,0x08}, {0x34,0x09}, |
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342 {0x32,0x09}, {0x30,0x09}, {0x2e,0x09}, {0x2c,0x09}, |
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343 {0x2a,0x09}, {0x28,0x09}, {0x26,0x09}, {0x30,0x0a}, |
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344 {0x2e,0x0a}, {0x2c,0x0a}, {0x2a,0x0a}, {0x28,0x0a}, |
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345 {0x26,0x0a}, {0x24,0x0a}, {0x22,0x0a}, {0x0e,0x0b}, |
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346 {0x0c,0x0b}, {0x0a,0x0b}, {0x08,0x0b}, {0x48,0x0c}, |
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347 {0x4a,0x0c}, {0x4c,0x0c}, {0x4e,0x0c}, {0xb0,0x0d}, |
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348 {0xb2,0x0d}, {0xb4,0x0d}, {0xb6,0x0d}, {0xb8,0x0d}, |
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349 {0xba,0x0d}, {0xbc,0x0d}, {0xbe,0x0d} |
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350 }; |
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351 |
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352 |
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353 const int8 vlbVLCRun0InterAC[64] = |
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354 { |
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355 0x0d, 0x07, 0x05, 0x04, 0x04, 0x04, 0x04, 0x03, |
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356 0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x02, |
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357 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
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358 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, |
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359 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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360 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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361 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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362 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
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363 }; |
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364 |
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365 const int8 vlbVLCRun1InterAC[64] = |
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366 { |
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367 0x04, 0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
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368 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
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369 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
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370 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
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371 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
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372 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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373 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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374 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
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375 }; |
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376 |
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377 /* other tables */ |
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378 const int8 vlbLMaxTableIntra[36] = |
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379 { |
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380 0x1b, 0x0a, 0x05, 0x04, 0x03, 0x03, |
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381 0x03, 0x03, 0x02, 0x02, 0x01, 0x01, |
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382 0x01, 0x01, 0x01, 0x08, 0x03, 0x02, |
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383 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, |
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384 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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385 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 |
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386 }; |
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387 |
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388 const int8 vlbLMaxTableInter[68] = |
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389 { |
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390 0x0c, 0x06, 0x04, 0x03, 0x03, 0x03, |
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391 0x03, 0x02, 0x02, 0x02, 0x02, 0x01, |
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392 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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393 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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394 0x01, 0x01, 0x01, 0x03, 0x02, 0x01, |
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395 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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396 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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397 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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398 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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399 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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400 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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401 0x01, 0x01 |
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402 }; |
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403 |
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404 const int8 vlbRMaxTableIntra[35] = |
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405 { |
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406 0x0f, 0x0a, 0x08, 0x04, 0x03, 0x02, |
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407 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, |
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408 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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409 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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410 0x01, 0x01, 0x01, 0x15, 0x07, 0x02, |
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411 0x01, 0x01, 0x01, 0x01, 0x01 |
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412 }; |
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413 |
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414 const int8 vlbRMaxTableInter[15] = |
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415 { |
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416 0x1b, 0x0b, 0x07, 0x03, 0x02, 0x02, |
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417 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
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418 0x29, 0x02, 0x01 |
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419 }; |
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420 |
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421 |
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422 const u_int32 vlbZigzagScan[64] = |
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423 { |
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424 0x00, 0x01, 0x08, 0x10, 0x09, 0x02, 0x03, 0x0a, |
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425 0x11, 0x18, 0x20, 0x19, 0x12, 0x0b, 0x04, 0x05, |
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426 0x0c, 0x13, 0x1a, 0x21, 0x28, 0x30, 0x29, 0x22, |
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427 0x1b, 0x14, 0x0d, 0x06, 0x07, 0x0e, 0x15, 0x1c, |
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428 0x23, 0x2a, 0x31, 0x38, 0x39, 0x32, 0x2b, 0x24, |
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429 0x1d, 0x16, 0x0f, 0x17, 0x1e, 0x25, 0x2c, 0x33, |
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430 0x3a, 0x3b, 0x34, 0x2d, 0x26, 0x1f, 0x27, 0x2e, |
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431 0x35, 0x3c, 0x3d, 0x36, 0x2f, 0x37, 0x3e, 0x3f |
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432 }; |
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433 |
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434 const u_int32 vlbInvZigzagScan[64] = |
|
435 { |
|
436 0x00, 0x01, 0x05, 0x06, 0x0e, 0x0f, 0x1b, 0x1c, |
|
437 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1d, 0x2a, |
|
438 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2b, |
|
439 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2c, 0x35, |
|
440 0x35, 0x35, 0x35, 0x35, 0x35, 0x35, 0x35, 0x36, |
|
441 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x37, 0x3c, |
|
442 0x3c, 0x3c, 0x3c, 0x3c, 0x3c, 0x3c, 0x3c, 0x3d, |
|
443 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3d, 0x3e, 0x3f |
|
444 }; |
|
445 |
|
446 |
|
447 const tVLCTable vlbLumaTableIntraDC[13] = |
|
448 { |
|
449 {0x03,0x03}, {0x03,0x02}, {0x02,0x02}, {0x02,0x03}, |
|
450 {0x01,0x03}, {0x01,0x04}, {0x01,0x05}, {0x01,0x06}, |
|
451 {0x01,0x07}, {0x01,0x08}, {0x01,0x09}, {0x01,0x0a}, |
|
452 {0x01,0x0b} |
|
453 }; |
|
454 |
|
455 const tVLCTable vlbChromaTableIntraDC[13] = |
|
456 { |
|
457 {0x03,0x02}, {0x02,0x02}, {0x01,0x02}, {0x01,0x03}, |
|
458 {0x01,0x04}, {0x01,0x05}, {0x01,0x06}, {0x01,0x07}, |
|
459 {0x01,0x08}, {0x01,0x09}, {0x01,0x0a}, {0x01,0x0b} |
|
460 }; |
|
461 |
|
462 /* Array of pointers for AC VLC (INTER)tables */ |
|
463 const tVLCTable * const vlbVLCTablePointer0[27] = |
|
464 { |
|
465 vlbVLCTable1InterAC, |
|
466 vlbVLCTable2InterAC, |
|
467 vlbVLCTable3InterAC, |
|
468 vlbVLCTable4InterAC[0], |
|
469 vlbVLCTable4InterAC[1], |
|
470 vlbVLCTable4InterAC[2], |
|
471 vlbVLCTable4InterAC[3], |
|
472 vlbVLCTable5InterAC[0], |
|
473 vlbVLCTable5InterAC[1], |
|
474 vlbVLCTable5InterAC[2], |
|
475 vlbVLCTable5InterAC[3], |
|
476 vlbVLCTable6InterAC - 0x01, // this pointer is going outside the range, but it is used only with condition (level < vlbVLCRun0InterAC[run]) which results having indexes > 0 and hence the array is never indexed below its base address |
|
477 vlbVLCTable6InterAC , |
|
478 vlbVLCTable6InterAC + 0x01, |
|
479 vlbVLCTable6InterAC + 0x02, |
|
480 vlbVLCTable6InterAC + 0x03, |
|
481 vlbVLCTable6InterAC + 0x04, |
|
482 vlbVLCTable6InterAC + 0x05, |
|
483 vlbVLCTable6InterAC + 0x06, |
|
484 vlbVLCTable6InterAC + 0x07, |
|
485 vlbVLCTable6InterAC + 0x08, |
|
486 vlbVLCTable6InterAC + 0x09, |
|
487 vlbVLCTable6InterAC + 0x0a, |
|
488 vlbVLCTable6InterAC + 0x0b, |
|
489 vlbVLCTable6InterAC + 0x0c, |
|
490 vlbVLCTable6InterAC + 0x0d, |
|
491 vlbVLCTable6InterAC + 0x0e |
|
492 |
|
493 }; |
|
494 |
|
495 const tVLCTable * const vlbVLCTablePointer1[41] = |
|
496 { |
|
497 vlbVLCTable7InterAc, |
|
498 vlbVLCTable8InterAC, |
|
499 vlbVLCTable9InterAC - 0x01, // this pointer is going outside the range, but it is used only with condition (level < vlbVLCRun1InterAC[run]) which results having indexes > 0 and hence the array is never indexed below its base address |
|
500 vlbVLCTable9InterAC , |
|
501 vlbVLCTable9InterAC + 0x01, |
|
502 vlbVLCTable9InterAC + 0x02, |
|
503 vlbVLCTable9InterAC + 0x03, |
|
504 vlbVLCTable9InterAC + 0x04, |
|
505 vlbVLCTable9InterAC + 0x05, |
|
506 vlbVLCTable9InterAC + 0x06, |
|
507 vlbVLCTable9InterAC + 0x07, |
|
508 vlbVLCTable9InterAC + 0x08, |
|
509 vlbVLCTable9InterAC + 0x09, |
|
510 vlbVLCTable9InterAC + 0x0a, |
|
511 vlbVLCTable9InterAC + 0x0b, |
|
512 vlbVLCTable9InterAC + 0x0c, |
|
513 vlbVLCTable9InterAC + 0x0d, |
|
514 vlbVLCTable9InterAC + 0x0e, |
|
515 vlbVLCTable9InterAC + 0x0f, |
|
516 vlbVLCTable9InterAC + 0x10, |
|
517 vlbVLCTable9InterAC + 0x11, |
|
518 vlbVLCTable9InterAC + 0x12, |
|
519 vlbVLCTable9InterAC + 0x13, |
|
520 vlbVLCTable9InterAC + 0x14, |
|
521 vlbVLCTable9InterAC + 0x15, |
|
522 vlbVLCTable9InterAC + 0x16, |
|
523 vlbVLCTable9InterAC + 0x17, |
|
524 vlbVLCTable9InterAC + 0x18, |
|
525 vlbVLCTable9InterAC + 0x19, |
|
526 vlbVLCTable9InterAC + 0x1a, |
|
527 vlbVLCTable9InterAC + 0x1b, |
|
528 vlbVLCTable9InterAC + 0x1c, |
|
529 vlbVLCTable9InterAC + 0x1d, |
|
530 vlbVLCTable9InterAC + 0x1e, |
|
531 vlbVLCTable9InterAC + 0x1f, |
|
532 vlbVLCTable9InterAC + 0x20, |
|
533 vlbVLCTable9InterAC + 0x21, |
|
534 vlbVLCTable9InterAC + 0x22, |
|
535 vlbVLCTable9InterAC + 0x23, |
|
536 vlbVLCTable9InterAC + 0x24, |
|
537 vlbVLCTable9InterAC + 0x25, |
|
538 }; |
|
539 |
|
540 const int8 vlbVLCRun0IntraAC[64] = |
|
541 { |
|
542 0x1c, 0x0b, 0x06, 0x05, 0x04, 0x04, 0x04, 0x04, |
|
543 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, |
|
544 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
545 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
546 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
547 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
548 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
549 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
|
550 }; |
|
551 |
|
552 const int8 vlbVLCRun1IntraAC[64] = |
|
553 { |
|
554 0x09, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x02, |
|
555 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
|
556 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, |
|
557 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
558 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
559 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
560 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
561 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
|
562 }; |
|
563 |
|
564 /* array of table pointers for AC VLC INTRA tables*/ |
|
565 |
|
566 const tVLCTable * const vlbVLCTableIntraPointer0[15] = |
|
567 { |
|
568 vlbVLCTable1IntraAC, |
|
569 vlbVLCTable2IntraAC, |
|
570 vlbVLCTable3IntraAC, |
|
571 vlbVLCTable4IntraAC, |
|
572 vlbVLCTable5IntraAC[0], |
|
573 vlbVLCTable5IntraAC[1], |
|
574 vlbVLCTable5IntraAC[2], |
|
575 vlbVLCTable5IntraAC[3], |
|
576 vlbVLCTable6IntraAC[0], |
|
577 vlbVLCTable6IntraAC[1], |
|
578 vlbVLCTable7IntraAC[0], |
|
579 vlbVLCTable7IntraAC[1], |
|
580 vlbVLCTable7IntraAC[2], |
|
581 vlbVLCTable7IntraAC[3], |
|
582 vlbVLCTable7IntraAC[4], |
|
583 }; |
|
584 |
|
585 const tVLCTable * const vlbVLCTableIntraPointer1[21] = |
|
586 { |
|
587 vlbVLCTable8IntraAC, |
|
588 vlbVLCTable9IntraAC, |
|
589 vlbVLCTable10IntraAC[0], |
|
590 vlbVLCTable10IntraAC[1], |
|
591 vlbVLCTable10IntraAC[2], |
|
592 vlbVLCTable10IntraAC[3], |
|
593 vlbVLCTable10IntraAC[4], |
|
594 vlbVLCTable11IntraAC[0], |
|
595 vlbVLCTable11IntraAC[1], |
|
596 vlbVLCTable11IntraAC[2], |
|
597 vlbVLCTable11IntraAC[3], |
|
598 vlbVLCTable11IntraAC[4], |
|
599 vlbVLCTable11IntraAC[5], |
|
600 vlbVLCTable11IntraAC[6], |
|
601 vlbVLCTable11IntraAC[7], |
|
602 vlbVLCTable11IntraAC[8], |
|
603 vlbVLCTable11IntraAC[9], |
|
604 vlbVLCTable11IntraAC[10], |
|
605 vlbVLCTable11IntraAC[11], |
|
606 vlbVLCTable11IntraAC[12], |
|
607 vlbVLCTable11IntraAC[13], |
|
608 }; |
|
609 |
|
610 |
|
611 /* {{-output"vdtPutIntraMBCMT.txt"}} */ |
|
612 /* |
|
613 * vdtPutIntraMBCMT |
|
614 * |
|
615 * Parameters: |
|
616 * outBuf output buffer |
|
617 * coeff pointer to the coefficients that must be in scanned order |
|
618 * numTextureBits pointer to store the number of bits taken to encode the macro block. |
|
619 * index block Index |
|
620 * skipDC whether to skip INTRA DC |
|
621 * skipAC whether to skip INTRA AC |
|
622 * |
|
623 * Function: |
|
624 * This function forms the bitstream for INTRA macroblock in combined motion and |
|
625 * texture mode for the transcoding module |
|
626 * |
|
627 * Returns: |
|
628 * Nothing. |
|
629 * |
|
630 * Error codes: |
|
631 * None. |
|
632 * |
|
633 */ |
|
634 void vdtPutIntraMBCMT(bibBuffer_t *outBuf, int *coeff, int *numTextureBits, int index, int skipDC, int skipAC) |
|
635 { |
|
636 int32 textureBits; |
|
637 textureBits = 0; |
|
638 |
|
639 // DC coefficient VLC |
|
640 if (!skipDC) |
|
641 { |
|
642 textureBits += vlbPutDCCoeffCMT(coeff[0], outBuf, index); |
|
643 } |
|
644 |
|
645 //AC coefficient VLC |
|
646 if (!skipAC) |
|
647 { |
|
648 textureBits += vlbPutIntraACCoeffCMT(1, coeff, outBuf); |
|
649 *numTextureBits = textureBits; |
|
650 } |
|
651 |
|
652 return; |
|
653 } |
|
654 |
|
655 |
|
656 /* {{-output"vdtPutInterMBCMT.txt"}} */ |
|
657 /* |
|
658 * vdtPutInterMBCMT |
|
659 * |
|
660 * Parameters: |
|
661 * outBuf output buffer |
|
662 * coeff pointer to the coefficients that must be in scanned order |
|
663 * numTextureBits pointer to store the number of bits taken to encode the macro block. |
|
664 * svh flag to indicate short video header |
|
665 * |
|
666 * Function: |
|
667 * This function forms the bitstream for INTER macroblock in combined motion and |
|
668 * texture mode for the transcoding module |
|
669 * |
|
670 * Returns: |
|
671 * Nothing. |
|
672 * |
|
673 * Error codes: |
|
674 * None. |
|
675 * |
|
676 */ |
|
677 void vdtPutInterMBCMT(bibBuffer_t *outBuf, int coeffStart, int *coeff, int *numTextureBits, int svh) |
|
678 { |
|
679 int32 textureBits; |
|
680 int16 coeffInt16[64]; |
|
681 |
|
682 /* encode texture coefficients */ |
|
683 textureBits = 0; |
|
684 /* find out the last nonzero coeficients */ |
|
685 int nonZeroDCT = 0; |
|
686 for (int i = 0; i < 64; i++) |
|
687 { |
|
688 nonZeroDCT = coeff[i] != 0 ? i : nonZeroDCT; |
|
689 coeffInt16[i] = (int16)coeff[i]; |
|
690 } |
|
691 textureBits += vlbPutACCoeffSVH(coeffStart, coeffInt16, outBuf, svh, nonZeroDCT); |
|
692 *numTextureBits = textureBits; |
|
693 |
|
694 return; |
|
695 } |
|
696 |
|
697 |
|
698 |
|
699 /* {{-output"vlbPutDCCoeffCMT.txt"}} */ |
|
700 /* |
|
701 * vlbPutDCCoeffCMT |
|
702 * |
|
703 * Parameters: |
|
704 * outBuf output buffer |
|
705 * val value of the DC coefficient |
|
706 * blkCnt block number in the macro block |
|
707 * |
|
708 * Function: |
|
709 * This function puts DC coefficient in CMT mode into the bitstream |
|
710 * |
|
711 * Returns: |
|
712 * number of bits outputted. |
|
713 * |
|
714 * Error codes: |
|
715 * None. |
|
716 * |
|
717 */ |
|
718 int32 vlbPutDCCoeffCMT(int val, bibBuffer_t * outBuf, int32 blkCnt) |
|
719 { |
|
720 int32 absVal; |
|
721 int32 numBits; |
|
722 int32 size; |
|
723 |
|
724 absVal = ABS(val); |
|
725 size = 0; |
|
726 |
|
727 while(absVal > 0) |
|
728 { |
|
729 size++; |
|
730 absVal >>= 1; |
|
731 } |
|
732 |
|
733 numBits = size; |
|
734 if(blkCnt < 4) |
|
735 { |
|
736 vlbPutBits(outBuf, vlbLumaTableIntraDC[size].length, vlbLumaTableIntraDC[size].code); |
|
737 numBits += vlbLumaTableIntraDC[size].length; |
|
738 } |
|
739 else |
|
740 { |
|
741 vlbPutBits(outBuf, vlbChromaTableIntraDC[size].length, vlbChromaTableIntraDC[size].code); |
|
742 numBits += vlbChromaTableIntraDC[size].length; |
|
743 } |
|
744 |
|
745 if(size) |
|
746 { |
|
747 if(val > 0) |
|
748 { |
|
749 vlbPutBits(outBuf, size, val); |
|
750 } |
|
751 else |
|
752 { |
|
753 absVal = ((1 << size) - 1); |
|
754 vlbPutBits(outBuf, size, (absVal + val)); |
|
755 } |
|
756 } |
|
757 |
|
758 if(size > 8) |
|
759 { |
|
760 vlbPutBits(outBuf, 1, 1); |
|
761 numBits++; |
|
762 } |
|
763 |
|
764 return numBits; |
|
765 } |
|
766 |
|
767 |
|
768 |
|
769 /* {{-output"vlbPutIntraACCoeffCMT.txt"}} */ |
|
770 /* |
|
771 * vlbPutIntraACCoeffCMT |
|
772 * |
|
773 * Parameters: |
|
774 * outBuf output buffer |
|
775 * coeffStart coefficient number from where the coding is to start |
|
776 * block pointer to the texture block data |
|
777 * |
|
778 * Function: |
|
779 * This function puts AC coefficients in CMT mode into the bitstream |
|
780 * |
|
781 * Returns: |
|
782 * number of bits outputted. |
|
783 * |
|
784 * Error codes: |
|
785 * None. |
|
786 * |
|
787 */ |
|
788 int32 vlbPutIntraACCoeffCMT(int32 coeffStart, int* block, bibBuffer_t * outBuf) |
|
789 { |
|
790 tEvent prevEvent; |
|
791 tEvent currEvent; |
|
792 int32 i; |
|
793 int32 numBits; |
|
794 tEvent *prev = &prevEvent; |
|
795 tEvent *curr = &currEvent; |
|
796 int level; |
|
797 |
|
798 curr->run = 0; |
|
799 prev->last = 0; |
|
800 numBits = 0; |
|
801 |
|
802 for(i = coeffStart; i < 64; i++) |
|
803 { |
|
804 level = block[i]; |
|
805 if(level == 0) |
|
806 { |
|
807 curr->run++; |
|
808 } |
|
809 else |
|
810 { |
|
811 prev->level = level; |
|
812 prev->run = curr->run; |
|
813 curr->run = 0; |
|
814 break; |
|
815 } |
|
816 } |
|
817 |
|
818 for(i = i+1; i < 64; i++) |
|
819 { |
|
820 level = block[i]; |
|
821 if(level == 0) |
|
822 { |
|
823 curr->run++; |
|
824 } |
|
825 else |
|
826 { |
|
827 numBits += vlbPutIntraACCoeffCMTDP(outBuf, &prevEvent); |
|
828 prev->level = level; |
|
829 prev->run = curr->run; |
|
830 curr->run = 0; |
|
831 } |
|
832 } |
|
833 |
|
834 prev->last = 1; |
|
835 numBits += vlbPutIntraACCoeffCMTDP(outBuf, &prevEvent); |
|
836 |
|
837 return numBits; |
|
838 } |
|
839 |
|
840 |
|
841 |
|
842 /* {{-output"vlbFindRMax.txt"}} */ |
|
843 /* |
|
844 * vlbFindRMax |
|
845 * |
|
846 * Parameters: |
|
847 * event pointer to the event being coded |
|
848 * mbType macro block encoding type (INTER/INTRA) |
|
849 * |
|
850 * Function: |
|
851 * This function finds RMAX value to subtract from run for escape coding |
|
852 * when reversible VLC is OFF |
|
853 * |
|
854 * Returns: |
|
855 * RMAX value |
|
856 * |
|
857 * Error codes: |
|
858 * None. |
|
859 * |
|
860 */ |
|
861 int32 vlbFindRMax(tEvent *event, int16 mbType) |
|
862 { |
|
863 int32 level; |
|
864 |
|
865 level = ABS(event->level); |
|
866 |
|
867 if(mbType == INTRA) |
|
868 { |
|
869 if(event->last == 0) |
|
870 { |
|
871 return level <= 27 ? vlbRMaxTableIntra[level - 1] : |
|
872 NOT_VALID; |
|
873 } |
|
874 else |
|
875 { |
|
876 return level <= 8 ? vlbRMaxTableIntra[level + 26] : |
|
877 NOT_VALID; |
|
878 } |
|
879 } |
|
880 else |
|
881 { |
|
882 if (event->last == 0) |
|
883 { |
|
884 return level <= 12 ? vlbRMaxTableInter[level - 1] : |
|
885 NOT_VALID; |
|
886 } |
|
887 else |
|
888 { |
|
889 return level <= 3 ? vlbRMaxTableInter[level + 11] |
|
890 : NOT_VALID; |
|
891 } |
|
892 } |
|
893 } |
|
894 |
|
895 |
|
896 |
|
897 /* {{-output"vlbFindLMax.txt"}} */ |
|
898 /* |
|
899 * vlbFindLMax |
|
900 * |
|
901 * Parameters: |
|
902 * event pointer to the event being coded |
|
903 * mbType macro block encoding type (INTER/INTRA) |
|
904 * |
|
905 * Function: |
|
906 * This function finds LMAX value to subtract from run for escape coding |
|
907 * when reversible VLC is OFF |
|
908 * |
|
909 * Returns: |
|
910 * LMAX value |
|
911 * |
|
912 * Error codes: |
|
913 * None. |
|
914 * |
|
915 */ |
|
916 int32 vlbFindLMax(tEvent *event, int16 mbType) |
|
917 { |
|
918 if (mbType == INTRA) |
|
919 { |
|
920 if (event->last == 0) |
|
921 { |
|
922 if (event->run <= 14) |
|
923 { |
|
924 return vlbLMaxTableIntra[event->run]; |
|
925 } |
|
926 else |
|
927 { |
|
928 return NOT_VALID; |
|
929 } |
|
930 } |
|
931 else |
|
932 { |
|
933 if (event->run <= 20) |
|
934 { |
|
935 return vlbLMaxTableIntra[event->run + 15]; |
|
936 } |
|
937 else |
|
938 { |
|
939 return NOT_VALID; |
|
940 } |
|
941 } |
|
942 } |
|
943 else |
|
944 { |
|
945 if (event->last == 0) |
|
946 { |
|
947 return event->run <= 26 ? vlbLMaxTableInter[event->run] : |
|
948 NOT_VALID; |
|
949 } |
|
950 else |
|
951 { |
|
952 return event->run <= 40 ? vlbLMaxTableInter[event->run + 27] : |
|
953 NOT_VALID; |
|
954 } |
|
955 } |
|
956 } |
|
957 |
|
958 |
|
959 |
|
960 /* {{-output"vlbPutIntraACCoeffCMTDP.txt"}} */ |
|
961 /* |
|
962 * vlbPutIntraACCoeffCMTDP |
|
963 * |
|
964 * Parameters: |
|
965 * outBuf output buffer |
|
966 * event pointer to the event being coded |
|
967 * |
|
968 * Function: |
|
969 * This function encodes AC coefficient for Intra blocks in combined motion texture |
|
970 mode and data partitioned mode |
|
971 * |
|
972 * Returns: |
|
973 * number of bits outputted. |
|
974 * |
|
975 * Error codes: |
|
976 * None. |
|
977 * |
|
978 */ |
|
979 int32 vlbPutIntraACCoeffCMTDP(bibBuffer_t *outBuf, tEvent *event) |
|
980 { |
|
981 int32 sign; |
|
982 int32 level; |
|
983 int32 run; |
|
984 int32 status; |
|
985 int32 count; |
|
986 const tVLCTable *vlcTable=NULL; |
|
987 int32 lmax; |
|
988 int32 rmax; |
|
989 |
|
990 sign = (event->level >> 15) & (0x1); |
|
991 level = ABS(event->level); |
|
992 run = event->run; |
|
993 count = 0; |
|
994 |
|
995 do |
|
996 { |
|
997 status = CODE_FOUND; |
|
998 if(event->last == 0) |
|
999 { |
|
1000 if(level < vlbVLCRun0IntraAC[run] ) |
|
1001 { |
|
1002 vlcTable = vlbVLCTableIntraPointer0[run]; |
|
1003 } |
|
1004 else |
|
1005 { |
|
1006 status = CODE_NOT_FOUND; |
|
1007 } |
|
1008 } |
|
1009 else |
|
1010 { |
|
1011 if(level < vlbVLCRun1IntraAC[run] ) |
|
1012 { |
|
1013 vlcTable = vlbVLCTableIntraPointer1[run]; |
|
1014 } |
|
1015 else |
|
1016 { |
|
1017 status = CODE_NOT_FOUND; |
|
1018 } |
|
1019 } |
|
1020 |
|
1021 if (status == CODE_NOT_FOUND) |
|
1022 { |
|
1023 switch (++count) |
|
1024 { |
|
1025 case 1: |
|
1026 { |
|
1027 lmax = vlbFindLMax(event, INTRA); |
|
1028 if (lmax == NOT_VALID) |
|
1029 { |
|
1030 count = 2; |
|
1031 } |
|
1032 else |
|
1033 { |
|
1034 level -= lmax; |
|
1035 break; |
|
1036 } |
|
1037 } |
|
1038 case 2: |
|
1039 { |
|
1040 rmax = vlbFindRMax(event, INTRA); |
|
1041 if (rmax != NOT_VALID) |
|
1042 { |
|
1043 level = ABS(event->level); |
|
1044 run = event->run - rmax; |
|
1045 break; |
|
1046 } |
|
1047 else |
|
1048 { |
|
1049 count = 3; |
|
1050 } |
|
1051 } |
|
1052 case 3: |
|
1053 { |
|
1054 status = CODE_FOUND; |
|
1055 } |
|
1056 } |
|
1057 } |
|
1058 |
|
1059 } while (status != CODE_FOUND); |
|
1060 |
|
1061 switch (count) |
|
1062 { |
|
1063 case 0: |
|
1064 vlbPutBits(outBuf, vlcTable[level].length, vlcTable[level].code | sign); |
|
1065 return vlcTable[level].length; |
|
1066 |
|
1067 case 1: |
|
1068 vlbPutBits(outBuf, ESCAPE_CODE_LENGTH_VLC, ESCAPE_CODE_VLC); |
|
1069 vlbPutBits(outBuf, 1, 0); |
|
1070 vlbPutBits(outBuf, vlcTable[level].length, vlcTable[level].code | sign); |
|
1071 return vlcTable[level].length + 1 + ESCAPE_CODE_LENGTH_VLC; |
|
1072 |
|
1073 case 2: |
|
1074 vlbPutBits(outBuf, ESCAPE_CODE_LENGTH_VLC, ESCAPE_CODE_VLC); |
|
1075 vlbPutBits(outBuf, 2, 0x2); |
|
1076 vlbPutBits(outBuf, vlcTable[level].length, vlcTable[level].code | sign); |
|
1077 return vlcTable[level].length + 2 + ESCAPE_CODE_LENGTH_VLC; |
|
1078 |
|
1079 case 3: |
|
1080 vlbPutBits(outBuf, ESCAPE_CODE_LENGTH_VLC, ESCAPE_CODE_VLC); |
|
1081 vlbPutBits(outBuf, 2, 0x3); |
|
1082 vlbPutBits(outBuf, 8, (event->last << 7) | (event->run << 1) | 1); |
|
1083 vlbPutBits(outBuf, 13, ((event->level & 0x0fff) << 1) | 1); |
|
1084 return 23 + ESCAPE_CODE_LENGTH_VLC; |
|
1085 |
|
1086 default: |
|
1087 return E_FAILURE; |
|
1088 } |
|
1089 } |
|
1090 |
|
1091 |
|
1092 |
|
1093 /* {{-output"vlbPutACCoeffSVH.txt"}} */ |
|
1094 /* |
|
1095 * vlbPutACCoeffSVH |
|
1096 * |
|
1097 * Parameters: |
|
1098 * outBuf output buffer |
|
1099 * coeffStart coefficient number from where the coding to be started |
|
1100 * block pointer to the texture block data. Coeficients must be in zigzag order |
|
1101 * svh flag indicating whether short video header mode is ON |
|
1102 * lastPos value of last non-zero position of block |
|
1103 * |
|
1104 * Function: |
|
1105 * This function puts AC coefficients in SVH mode into the bitstream |
|
1106 * |
|
1107 * Returns: |
|
1108 * number of bits outputted. |
|
1109 * |
|
1110 * Error codes: |
|
1111 * None. |
|
1112 * |
|
1113 */ |
|
1114 int32 vlbPutACCoeffSVH(int32 coeffStart, int16* block, bibBuffer_t * outBuf, |
|
1115 int32 svh, int32 lastPos) |
|
1116 |
|
1117 { |
|
1118 tEvent prevEvent; |
|
1119 tEvent currEvent; |
|
1120 int32 i; |
|
1121 int32 numBits; |
|
1122 tEvent *prev ; |
|
1123 tEvent *curr ; |
|
1124 int32 level; |
|
1125 int32 lastPosition = lastPos; |
|
1126 |
|
1127 prev = &prevEvent; |
|
1128 curr = &currEvent; |
|
1129 curr->run = 0; |
|
1130 prev->last = 0; |
|
1131 numBits = 0; |
|
1132 |
|
1133 for(i = coeffStart; i <= lastPosition; i++) |
|
1134 { |
|
1135 level = (int16)block[i]; |
|
1136 if(level == 0) |
|
1137 { |
|
1138 curr->run++; |
|
1139 } |
|
1140 else |
|
1141 { |
|
1142 // clip the coeff (MPEG-4 has larger range than H.263) requantization of the whole block is too complicated for this minor use case |
|
1143 if ( level < -127 ) |
|
1144 { |
|
1145 level = -127; |
|
1146 } |
|
1147 else if ( level > 127 ) |
|
1148 { |
|
1149 level = 127; |
|
1150 } |
|
1151 prev->level = level; |
|
1152 prev->run = curr->run; |
|
1153 curr->run = 0; |
|
1154 break; |
|
1155 } |
|
1156 } |
|
1157 |
|
1158 for(i = i+1; i <= lastPosition; i++) |
|
1159 { |
|
1160 level = (int16)block[i]; |
|
1161 if(level == 0) |
|
1162 { |
|
1163 curr->run++; |
|
1164 } |
|
1165 else |
|
1166 { |
|
1167 numBits += vlbPutACVLCCoeff(outBuf, &prevEvent,svh); |
|
1168 |
|
1169 // clip the coeff (MPEG-4 has larger range than H.263) requantization of the whole block is too complicated for this minor use case |
|
1170 if ( level < -127 ) |
|
1171 { |
|
1172 level = -127; |
|
1173 } |
|
1174 else if ( level > 127 ) |
|
1175 { |
|
1176 level = 127; |
|
1177 } |
|
1178 prev->level = level; |
|
1179 prev->run = curr->run; |
|
1180 curr->run = 0; |
|
1181 } |
|
1182 } |
|
1183 |
|
1184 prev->last = 1; |
|
1185 numBits += vlbPutACVLCCoeff(outBuf, &prevEvent,svh); |
|
1186 |
|
1187 return numBits; |
|
1188 } |
|
1189 |
|
1190 |
|
1191 |
|
1192 /* {{-output"vlbCodeACCoeffsSVHWithZigZag.txt"}} */ |
|
1193 /* |
|
1194 * vlbCodeACCoeffsSVHWithZigZag |
|
1195 * |
|
1196 * Parameters: |
|
1197 * outBuf output buffer |
|
1198 * coeffStart coefficient number from where the coding to be started |
|
1199 * block pointer to the texture block data. Coeficients must be in zigzag order |
|
1200 * svh flag indicating whether short video header mode is ON |
|
1201 * lastPos value of last non-zero position of block |
|
1202 * |
|
1203 * Function: |
|
1204 * This function puts AC coefficients in SVH mode with zigzag into the bitstream |
|
1205 * |
|
1206 * Returns: |
|
1207 * number of bits outputted. |
|
1208 * |
|
1209 * Error codes: |
|
1210 * None. |
|
1211 * |
|
1212 */ |
|
1213 int32 vlbCodeACCoeffsSVHWithZigZag(int32 coeffStart, int16* block, bibBuffer_t * outBuf, |
|
1214 int32 svh, int32 lastPos) |
|
1215 |
|
1216 { |
|
1217 tEvent prevEvent; |
|
1218 tEvent currEvent; |
|
1219 int32 i; |
|
1220 int32 numBits; |
|
1221 tEvent *prev ; |
|
1222 tEvent *curr ; |
|
1223 int32 level; |
|
1224 int32 lastPosition = vlbInvZigzagScan[lastPos]; |
|
1225 |
|
1226 prev = &prevEvent; |
|
1227 curr = &currEvent; |
|
1228 curr->run = 0; |
|
1229 prev->last = 0; |
|
1230 numBits = 0; |
|
1231 |
|
1232 for(i = coeffStart; i <= lastPosition; i++) |
|
1233 { |
|
1234 level = block[vlbZigzagScan[i]]; |
|
1235 if(level == 0) |
|
1236 { |
|
1237 curr->run++; |
|
1238 } |
|
1239 else |
|
1240 { |
|
1241 prev->level = level; |
|
1242 prev->run = curr->run; |
|
1243 curr->run = 0; |
|
1244 break; |
|
1245 } |
|
1246 } |
|
1247 |
|
1248 for(i = i+1; i <= lastPosition; i++) |
|
1249 { |
|
1250 level = block[vlbZigzagScan[i]]; |
|
1251 if(level == 0) |
|
1252 { |
|
1253 curr->run++; |
|
1254 } |
|
1255 else |
|
1256 { |
|
1257 numBits += vlbPutACVLCCoeff(outBuf, &prevEvent,svh); |
|
1258 prev->level = level; |
|
1259 prev->run = curr->run; |
|
1260 curr->run = 0; |
|
1261 } |
|
1262 } |
|
1263 |
|
1264 prev->last = 1; |
|
1265 numBits += vlbPutACVLCCoeff(outBuf, &prevEvent,svh); |
|
1266 |
|
1267 return numBits; |
|
1268 } |
|
1269 |
|
1270 |
|
1271 |
|
1272 |
|
1273 /* {{-output"vlbPutACVLCCoeff.txt"}} */ |
|
1274 /* |
|
1275 * vlbPutACVLCCoeff |
|
1276 * |
|
1277 * Parameters: |
|
1278 * outBuf output buffer |
|
1279 * event pointer to the event being coded |
|
1280 * svh flag indicating whether short video header mode is ON |
|
1281 * |
|
1282 * Function: |
|
1283 * This function encodes AC coefficients for Inter and Intra blocks in SVH mode and |
|
1284 * inter blocks in non-SVH mode |
|
1285 * |
|
1286 * Returns: |
|
1287 * number of bits outputted. |
|
1288 * |
|
1289 * Error codes: |
|
1290 * None. |
|
1291 * |
|
1292 */ |
|
1293 int32 vlbPutACVLCCoeff(bibBuffer_t *outBuf, tEvent *event, int32 svh) |
|
1294 { |
|
1295 int32 sign; |
|
1296 int32 run; |
|
1297 int32 level; |
|
1298 int32 status; |
|
1299 int32 count; |
|
1300 const tVLCTable *vlcTable= NULL; |
|
1301 int32 lmax; |
|
1302 int32 rmax; |
|
1303 |
|
1304 sign = (event->level >> 15) & (0x1); |
|
1305 level = ABS(event->level); |
|
1306 run = event->run; |
|
1307 count = 0; |
|
1308 |
|
1309 do |
|
1310 { |
|
1311 status = CODE_FOUND; |
|
1312 if(event->last == 0) |
|
1313 { |
|
1314 if(level < vlbVLCRun0InterAC[run] ) |
|
1315 { |
|
1316 vlcTable = vlbVLCTablePointer0[run]; |
|
1317 } |
|
1318 else |
|
1319 { |
|
1320 status = CODE_NOT_FOUND; |
|
1321 } |
|
1322 } |
|
1323 else |
|
1324 { |
|
1325 if(level < vlbVLCRun1InterAC[run] ) |
|
1326 { |
|
1327 vlcTable = vlbVLCTablePointer1[run]; |
|
1328 } |
|
1329 else |
|
1330 { |
|
1331 status = CODE_NOT_FOUND; |
|
1332 } |
|
1333 } |
|
1334 |
|
1335 if (status == CODE_NOT_FOUND) |
|
1336 { |
|
1337 if (svh == ON) |
|
1338 { |
|
1339 count = 4; |
|
1340 status = CODE_FOUND; |
|
1341 } |
|
1342 else |
|
1343 { |
|
1344 switch (++count) |
|
1345 { |
|
1346 case 1: |
|
1347 { |
|
1348 lmax = vlbFindLMax(event, INTER); |
|
1349 if (lmax == NOT_VALID) |
|
1350 { |
|
1351 count = 2; |
|
1352 } |
|
1353 else |
|
1354 { |
|
1355 level = ABS(event->level) - lmax; |
|
1356 break; |
|
1357 } |
|
1358 } |
|
1359 case 2: |
|
1360 { |
|
1361 rmax = vlbFindRMax(event, INTER); |
|
1362 if (rmax != NOT_VALID) |
|
1363 { |
|
1364 level = ABS(event->level); |
|
1365 run = event->run - rmax; |
|
1366 break; |
|
1367 } |
|
1368 else |
|
1369 { |
|
1370 count = 3; |
|
1371 } |
|
1372 } |
|
1373 case 3: |
|
1374 { |
|
1375 status = CODE_FOUND; |
|
1376 break; |
|
1377 } |
|
1378 default: |
|
1379 { |
|
1380 return E_FAILURE; |
|
1381 } |
|
1382 } |
|
1383 } |
|
1384 } |
|
1385 |
|
1386 } while (status != CODE_FOUND); |
|
1387 |
|
1388 switch (count) |
|
1389 { |
|
1390 case 0: |
|
1391 { |
|
1392 vlbPutBits(outBuf, vlcTable[level].length, vlcTable[level].code | sign); |
|
1393 return vlcTable[level].length; |
|
1394 } |
|
1395 case 1: |
|
1396 { |
|
1397 vlbPutBits(outBuf, ESCAPE_CODE_LENGTH_VLC, ESCAPE_CODE_VLC); |
|
1398 vlbPutBits(outBuf, 1, 0); |
|
1399 vlbPutBits(outBuf, vlcTable[level].length, vlcTable[level].code | sign); |
|
1400 return vlcTable[level].length + 1 + ESCAPE_CODE_LENGTH_VLC; |
|
1401 } |
|
1402 case 2: |
|
1403 { |
|
1404 vlbPutBits(outBuf, ESCAPE_CODE_LENGTH_VLC, ESCAPE_CODE_VLC); |
|
1405 vlbPutBits(outBuf, 2, 0x2); |
|
1406 vlbPutBits(outBuf, vlcTable[level].length, vlcTable[level].code | sign); |
|
1407 return vlcTable[level].length + 2 + ESCAPE_CODE_LENGTH_VLC; |
|
1408 } |
|
1409 case 3: |
|
1410 { |
|
1411 vlbPutBits(outBuf, ESCAPE_CODE_LENGTH_VLC, ESCAPE_CODE_VLC); |
|
1412 vlbPutBits(outBuf, 2, 0x3); |
|
1413 /* Fixed Length Coding of Events */ |
|
1414 vlbPutBits(outBuf, 8, (event->last << 7) | (event->run << 1) | 1); |
|
1415 vlbPutBits(outBuf, 13, ((event->level & 0x0fff) << 1) | 1); |
|
1416 return 23 + ESCAPE_CODE_LENGTH_VLC; |
|
1417 } |
|
1418 case 4: |
|
1419 { |
|
1420 vlbPutBits(outBuf, ESCAPE_CODE_LENGTH_VLC, ESCAPE_CODE_VLC); |
|
1421 vlbPutBits(outBuf, 7, (event->last << 6) | event->run); |
|
1422 vlbPutBits(outBuf, 8, event->level & 0x0ff); |
|
1423 return 15 + ESCAPE_CODE_LENGTH_VLC; |
|
1424 } |
|
1425 default: |
|
1426 { |
|
1427 return E_FAILURE; |
|
1428 } |
|
1429 } |
|
1430 } |
|
1431 |
|
1432 /* End of vlb.cpp */ |
|
1433 |
|
1434 |