1 | <?php |
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2 | ///////////////////////////////////////////////////////////////// |
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3 | /// getID3() by James Heinrich <info@getid3.org> // |
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4 | // available at http://getid3.sourceforge.net // |
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5 | // or http://www.getid3.org // |
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6 | ///////////////////////////////////////////////////////////////// |
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7 | // See readme.txt for more details // |
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8 | ///////////////////////////////////////////////////////////////// |
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9 | // // |
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10 | // module.audio.la.php // |
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11 | // module for analyzing BONK audio files // |
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12 | // dependencies: module.tag.id3v2.php (optional) // |
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13 | // /// |
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14 | ///////////////////////////////////////////////////////////////// |
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15 | |
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16 | |
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17 | class getid3_bonk |
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18 | { |
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19 | function getid3_bonk(&$fd, &$ThisFileInfo) { |
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20 | |
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21 | // shortcut |
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22 | $ThisFileInfo['bonk'] = array(); |
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23 | $thisfile_bonk = &$ThisFileInfo['bonk']; |
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24 | |
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25 | $thisfile_bonk['dataoffset'] = $ThisFileInfo['avdataoffset']; |
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26 | $thisfile_bonk['dataend'] = $ThisFileInfo['avdataend']; |
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27 | |
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28 | if ($thisfile_bonk['dataend'] >= pow(2, 31)) { |
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29 | |
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30 | $ThisFileInfo['warning'][] = 'Unable to parse BONK file from end (v0.6+ preferred method) because PHP filesystem functions only support up to 2GB'; |
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31 | |
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32 | } else { |
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33 | |
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34 | // scan-from-end method, for v0.6 and higher |
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35 | fseek($fd, $thisfile_bonk['dataend'] - 8, SEEK_SET); |
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36 | $PossibleBonkTag = fread($fd, 8); |
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37 | while ($this->BonkIsValidTagName(substr($PossibleBonkTag, 4, 4), true)) { |
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38 | $BonkTagSize = getid3_lib::LittleEndian2Int(substr($PossibleBonkTag, 0, 4)); |
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39 | fseek($fd, 0 - $BonkTagSize, SEEK_CUR); |
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40 | $BonkTagOffset = ftell($fd); |
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41 | $TagHeaderTest = fread($fd, 5); |
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42 | if (($TagHeaderTest{0} != "\x00") || (substr($PossibleBonkTag, 4, 4) != strtolower(substr($PossibleBonkTag, 4, 4)))) { |
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43 | $ThisFileInfo['error'][] = 'Expecting "Ø'.strtoupper(substr($PossibleBonkTag, 4, 4)).'" at offset '.$BonkTagOffset.', found "'.$TagHeaderTest.'"'; |
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44 | return false; |
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45 | } |
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46 | $BonkTagName = substr($TagHeaderTest, 1, 4); |
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47 | |
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48 | $thisfile_bonk[$BonkTagName]['size'] = $BonkTagSize; |
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49 | $thisfile_bonk[$BonkTagName]['offset'] = $BonkTagOffset; |
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50 | $this->HandleBonkTags($fd, $BonkTagName, $ThisFileInfo); |
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51 | $NextTagEndOffset = $BonkTagOffset - 8; |
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52 | if ($NextTagEndOffset < $thisfile_bonk['dataoffset']) { |
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53 | if (empty($ThisFileInfo['audio']['encoder'])) { |
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54 | $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.9+'; |
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55 | } |
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56 | return true; |
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57 | } |
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58 | fseek($fd, $NextTagEndOffset, SEEK_SET); |
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59 | $PossibleBonkTag = fread($fd, 8); |
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60 | } |
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61 | |
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62 | } |
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63 | |
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64 | // seek-from-beginning method for v0.4 and v0.5 |
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65 | if (empty($thisfile_bonk['BONK'])) { |
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66 | fseek($fd, $thisfile_bonk['dataoffset'], SEEK_SET); |
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67 | do { |
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68 | $TagHeaderTest = fread($fd, 5); |
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69 | switch ($TagHeaderTest) { |
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70 | case "\x00".'BONK': |
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71 | if (empty($ThisFileInfo['audio']['encoder'])) { |
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72 | $ThisFileInfo['audio']['encoder'] = 'BONK v0.4'; |
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73 | } |
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74 | break; |
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75 | |
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76 | case "\x00".'INFO': |
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77 | $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.5'; |
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78 | break; |
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79 | |
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80 | default: |
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81 | break 2; |
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82 | } |
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83 | $BonkTagName = substr($TagHeaderTest, 1, 4); |
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84 | $thisfile_bonk[$BonkTagName]['size'] = $thisfile_bonk['dataend'] - $thisfile_bonk['dataoffset']; |
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85 | $thisfile_bonk[$BonkTagName]['offset'] = $thisfile_bonk['dataoffset']; |
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86 | $this->HandleBonkTags($fd, $BonkTagName, $ThisFileInfo); |
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87 | |
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88 | } while (true); |
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89 | } |
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90 | |
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91 | // parse META block for v0.6 - v0.8 |
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92 | if (empty($thisfile_bonk['INFO']) && isset($thisfile_bonk['META']['tags']['info'])) { |
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93 | fseek($fd, $thisfile_bonk['META']['tags']['info'], SEEK_SET); |
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94 | $TagHeaderTest = fread($fd, 5); |
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95 | if ($TagHeaderTest == "\x00".'INFO') { |
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96 | $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.6 - v0.8'; |
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97 | |
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98 | $BonkTagName = substr($TagHeaderTest, 1, 4); |
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99 | $thisfile_bonk[$BonkTagName]['size'] = $thisfile_bonk['dataend'] - $thisfile_bonk['dataoffset']; |
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100 | $thisfile_bonk[$BonkTagName]['offset'] = $thisfile_bonk['dataoffset']; |
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101 | $this->HandleBonkTags($fd, $BonkTagName, $ThisFileInfo); |
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102 | } |
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103 | } |
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104 | |
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105 | if (empty($ThisFileInfo['audio']['encoder'])) { |
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106 | $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.9+'; |
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107 | } |
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108 | if (empty($thisfile_bonk['BONK'])) { |
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109 | unset($ThisFileInfo['bonk']); |
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110 | } |
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111 | return true; |
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112 | |
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113 | } |
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114 | |
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115 | function HandleBonkTags(&$fd, &$BonkTagName, &$ThisFileInfo) { |
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116 | |
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117 | switch ($BonkTagName) { |
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118 | case 'BONK': |
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119 | // shortcut |
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120 | $thisfile_bonk_BONK = &$ThisFileInfo['bonk']['BONK']; |
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121 | |
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122 | $BonkData = "\x00".'BONK'.fread($fd, 17); |
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123 | $thisfile_bonk_BONK['version'] = getid3_lib::LittleEndian2Int(substr($BonkData, 5, 1)); |
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124 | $thisfile_bonk_BONK['number_samples'] = getid3_lib::LittleEndian2Int(substr($BonkData, 6, 4)); |
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125 | $thisfile_bonk_BONK['sample_rate'] = getid3_lib::LittleEndian2Int(substr($BonkData, 10, 4)); |
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126 | |
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127 | $thisfile_bonk_BONK['channels'] = getid3_lib::LittleEndian2Int(substr($BonkData, 14, 1)); |
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128 | $thisfile_bonk_BONK['lossless'] = (bool) getid3_lib::LittleEndian2Int(substr($BonkData, 15, 1)); |
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129 | $thisfile_bonk_BONK['joint_stereo'] = (bool) getid3_lib::LittleEndian2Int(substr($BonkData, 16, 1)); |
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130 | $thisfile_bonk_BONK['number_taps'] = getid3_lib::LittleEndian2Int(substr($BonkData, 17, 2)); |
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131 | $thisfile_bonk_BONK['downsampling_ratio'] = getid3_lib::LittleEndian2Int(substr($BonkData, 19, 1)); |
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132 | $thisfile_bonk_BONK['samples_per_packet'] = getid3_lib::LittleEndian2Int(substr($BonkData, 20, 2)); |
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133 | |
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134 | $ThisFileInfo['avdataoffset'] = $thisfile_bonk_BONK['offset'] + 5 + 17; |
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135 | $ThisFileInfo['avdataend'] = $thisfile_bonk_BONK['offset'] + $thisfile_bonk_BONK['size']; |
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136 | |
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137 | $ThisFileInfo['fileformat'] = 'bonk'; |
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138 | $ThisFileInfo['audio']['dataformat'] = 'bonk'; |
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139 | $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // assumed |
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140 | $ThisFileInfo['audio']['channels'] = $thisfile_bonk_BONK['channels']; |
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141 | $ThisFileInfo['audio']['sample_rate'] = $thisfile_bonk_BONK['sample_rate']; |
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142 | $ThisFileInfo['audio']['channelmode'] = ($thisfile_bonk_BONK['joint_stereo'] ? 'joint stereo' : 'stereo'); |
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143 | $ThisFileInfo['audio']['lossless'] = $thisfile_bonk_BONK['lossless']; |
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144 | $ThisFileInfo['audio']['codec'] = 'bonk'; |
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145 | |
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146 | $ThisFileInfo['playtime_seconds'] = $thisfile_bonk_BONK['number_samples'] / ($thisfile_bonk_BONK['sample_rate'] * $thisfile_bonk_BONK['channels']); |
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147 | if ($ThisFileInfo['playtime_seconds'] > 0) { |
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148 | $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['bonk']['dataend'] - $ThisFileInfo['bonk']['dataoffset']) * 8) / $ThisFileInfo['playtime_seconds']; |
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149 | } |
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150 | break; |
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151 | |
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152 | case 'INFO': |
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153 | // shortcut |
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154 | $thisfile_bonk_INFO = &$ThisFileInfo['bonk']['INFO']; |
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155 | |
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156 | $thisfile_bonk_INFO['version'] = getid3_lib::LittleEndian2Int(fread($fd, 1)); |
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157 | $thisfile_bonk_INFO['entries_count'] = 0; |
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158 | $NextInfoDataPair = fread($fd, 5); |
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159 | if (!$this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) { |
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160 | while (!feof($fd)) { |
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161 | //$CurrentSeekInfo['offset'] = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 0, 4)); |
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162 | //$CurrentSeekInfo['nextbit'] = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 4, 1)); |
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163 | //$thisfile_bonk_INFO[] = $CurrentSeekInfo; |
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164 | |
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165 | $NextInfoDataPair = fread($fd, 5); |
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166 | if ($this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) { |
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167 | fseek($fd, -5, SEEK_CUR); |
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168 | break; |
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169 | } |
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170 | $thisfile_bonk_INFO['entries_count']++; |
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171 | } |
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172 | } |
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173 | break; |
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174 | |
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175 | case 'META': |
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176 | $BonkData = "\x00".'META'.fread($fd, $ThisFileInfo['bonk']['META']['size'] - 5); |
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177 | $ThisFileInfo['bonk']['META']['version'] = getid3_lib::LittleEndian2Int(substr($BonkData, 5, 1)); |
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178 | |
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179 | $MetaTagEntries = floor(((strlen($BonkData) - 8) - 6) / 8); // BonkData - xxxxmeta - ØMETA |
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180 | $offset = 6; |
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181 | for ($i = 0; $i < $MetaTagEntries; $i++) { |
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182 | $MetaEntryTagName = substr($BonkData, $offset, 4); |
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183 | $offset += 4; |
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184 | $MetaEntryTagOffset = getid3_lib::LittleEndian2Int(substr($BonkData, $offset, 4)); |
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185 | $offset += 4; |
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186 | $ThisFileInfo['bonk']['META']['tags'][$MetaEntryTagName] = $MetaEntryTagOffset; |
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187 | } |
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188 | break; |
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189 | |
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190 | case ' ID3': |
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191 | $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.9+'; |
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192 | |
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193 | // ID3v2 checking is optional |
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194 | if (class_exists('getid3_id3v2')) { |
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195 | $ThisFileInfo['bonk'][' ID3']['valid'] = new getid3_id3v2($fd, $ThisFileInfo, $ThisFileInfo['bonk'][' ID3']['offset'] + 2); |
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196 | } |
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197 | break; |
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198 | |
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199 | default: |
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200 | $ThisFileInfo['warning'][] = 'Unexpected Bonk tag "'.$BonkTagName.'" at offset '.$ThisFileInfo['bonk'][$BonkTagName]['offset']; |
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201 | break; |
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202 | |
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203 | } |
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204 | } |
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205 | |
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206 | function BonkIsValidTagName($PossibleBonkTag, $ignorecase=false) { |
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207 | static $BonkIsValidTagName = array('BONK', 'INFO', ' ID3', 'META'); |
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208 | foreach ($BonkIsValidTagName as $validtagname) { |
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209 | if ($validtagname == $PossibleBonkTag) { |
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210 | return true; |
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211 | } elseif ($ignorecase && (strtolower($validtagname) == strtolower($PossibleBonkTag))) { |
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212 | return true; |
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213 | } |
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214 | } |
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215 | return false; |
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216 | } |
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217 | |
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218 | } |
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219 | |
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220 | |
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221 | ?> |
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