1 | <?php |
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2 | // +----------------------------------------------------------------------+ |
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3 | // | PHP version 5 | |
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4 | // +----------------------------------------------------------------------+ |
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5 | // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | |
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6 | // +----------------------------------------------------------------------+ |
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7 | // | This source file is subject to version 2 of the GPL license, | |
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8 | // | that is bundled with this package in the file license.txt and is | |
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9 | // | available through the world-wide-web at the following url: | |
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10 | // | http://www.gnu.org/copyleft/gpl.html | |
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11 | // +----------------------------------------------------------------------+ |
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12 | // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | |
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13 | // +----------------------------------------------------------------------+ |
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14 | // | Authors: James Heinrich <infoØgetid3*org> | |
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15 | // | Allan Hansen <ahØartemis*dk> | |
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16 | // +----------------------------------------------------------------------+ |
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17 | // | module.audio.bonk.php | |
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18 | // | Module for analyzing BONK audio files | |
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19 | // | dependencies: module.tag.id3v2.php (optional) | |
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20 | // +----------------------------------------------------------------------+ |
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21 | // |
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22 | // $Id: module.audio.bonk.php 3318 2009-05-20 21:54:10Z vdigital $ |
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23 | |
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24 | |
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25 | |
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26 | class getid3_bonk extends getid3_handler |
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27 | { |
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28 | |
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29 | public function Analyze() { |
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30 | |
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31 | $getid3 = $this->getid3; |
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32 | |
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33 | $getid3->info['bonk'] = array (); |
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34 | $info_bonk = &$getid3->info['bonk']; |
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35 | |
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36 | $info_bonk['dataoffset'] = $getid3->info['avdataoffset']; |
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37 | $info_bonk['dataend'] = $getid3->info['avdataend']; |
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38 | |
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39 | |
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40 | // Scan-from-end method, for v0.6 and higher |
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41 | fseek($getid3->fp, $info_bonk['dataend'] - 8, SEEK_SET); |
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42 | $possible_bonk_tag = fread($getid3->fp, 8); |
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43 | while (getid3_bonk::BonkIsValidTagName(substr($possible_bonk_tag, 4, 4), true)) { |
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44 | $bonk_tag_size = getid3_lib::LittleEndian2Int(substr($possible_bonk_tag, 0, 4)); |
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45 | fseek($getid3->fp, 0 - $bonk_tag_size, SEEK_CUR); |
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46 | $bonk_tag_offset = ftell($getid3->fp); |
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47 | $tag_header_test = fread($getid3->fp, 5); |
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48 | if (($tag_header_test{0} != "\x00") || (substr($possible_bonk_tag, 4, 4) != strtolower(substr($possible_bonk_tag, 4, 4)))) { |
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49 | throw new getid3_exception('Expecting "Ø'.strtoupper(substr($possible_bonk_tag, 4, 4)).'" at offset '.$bonk_tag_offset.', found "'.$tag_header_test.'"'); |
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50 | } |
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51 | $bonk_tag_name = substr($tag_header_test, 1, 4); |
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52 | |
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53 | $info_bonk[$bonk_tag_name]['size'] = $bonk_tag_size; |
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54 | $info_bonk[$bonk_tag_name]['offset'] = $bonk_tag_offset; |
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55 | $this->HandleBonkTags($bonk_tag_name); |
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56 | |
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57 | $next_tag_end_offset = $bonk_tag_offset - 8; |
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58 | if ($next_tag_end_offset < $info_bonk['dataoffset']) { |
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59 | if (empty($getid3->info['audio']['encoder'])) { |
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60 | $getid3->info['audio']['encoder'] = 'Extended BONK v0.9+'; |
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61 | } |
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62 | return true; |
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63 | } |
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64 | fseek($getid3->fp, $next_tag_end_offset, SEEK_SET); |
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65 | $possible_bonk_tag = fread($getid3->fp, 8); |
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66 | } |
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67 | |
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68 | // Seek-from-beginning method for v0.4 and v0.5 |
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69 | if (empty($info_bonk['BONK'])) { |
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70 | fseek($getid3->fp, $info_bonk['dataoffset'], SEEK_SET); |
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71 | do { |
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72 | $tag_header_test = fread($getid3->fp, 5); |
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73 | switch ($tag_header_test) { |
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74 | case "\x00".'BONK': |
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75 | if (empty($getid3->info['audio']['encoder'])) { |
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76 | $getid3->info['audio']['encoder'] = 'BONK v0.4'; |
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77 | } |
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78 | break; |
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79 | |
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80 | case "\x00".'INFO': |
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81 | $getid3->info['audio']['encoder'] = 'Extended BONK v0.5'; |
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82 | break; |
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83 | |
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84 | default: |
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85 | break 2; |
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86 | } |
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87 | $bonk_tag_name = substr($tag_header_test, 1, 4); |
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88 | $info_bonk[$bonk_tag_name]['size'] = $info_bonk['dataend'] - $info_bonk['dataoffset']; |
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89 | $info_bonk[$bonk_tag_name]['offset'] = $info_bonk['dataoffset']; |
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90 | $this->HandleBonkTags($bonk_tag_name); |
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91 | |
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92 | } while (true); |
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93 | } |
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94 | |
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95 | |
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96 | // Parse META block for v0.6 - v0.8 |
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97 | if (!@$info_bonk['INFO'] && isset($info_bonk['META']['tags']['info'])) { |
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98 | fseek($getid3->fp, $info_bonk['META']['tags']['info'], SEEK_SET); |
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99 | $tag_header_test = fread($getid3->fp, 5); |
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100 | if ($tag_header_test == "\x00".'INFO') { |
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101 | $getid3->info['audio']['encoder'] = 'Extended BONK v0.6 - v0.8'; |
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102 | |
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103 | $bonk_tag_name = substr($tag_header_test, 1, 4); |
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104 | $info_bonk[$bonk_tag_name]['size'] = $info_bonk['dataend'] - $info_bonk['dataoffset']; |
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105 | $info_bonk[$bonk_tag_name]['offset'] = $info_bonk['dataoffset']; |
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106 | $this->HandleBonkTags($bonk_tag_name); |
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107 | } |
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108 | } |
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109 | |
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110 | if (empty($getid3->info['audio']['encoder'])) { |
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111 | $getid3->info['audio']['encoder'] = 'Extended BONK v0.9+'; |
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112 | } |
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113 | if (empty($info_bonk['BONK'])) { |
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114 | unset($getid3->info['bonk']); |
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115 | } |
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116 | return true; |
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117 | |
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118 | } |
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119 | |
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120 | |
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121 | |
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122 | private function HandleBonkTags(&$bonk_tag_name) { |
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123 | |
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124 | // Shortcut to getid3 pointer |
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125 | $getid3 = $this->getid3; |
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126 | $info_audio = &$getid3->info['audio']; |
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127 | |
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128 | switch ($bonk_tag_name) { |
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129 | |
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130 | case 'BONK': |
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131 | // shortcut |
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132 | $info_bonk_BONK = &$getid3->info['bonk']['BONK']; |
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133 | |
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134 | $bonk_data = "\x00".'BONK'.fread($getid3->fp, 17); |
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135 | |
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136 | getid3_lib::ReadSequence('LittleEndian2Int', $info_bonk_BONK, $bonk_data, 5, |
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137 | array ( |
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138 | 'version' => 1, |
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139 | 'number_samples' => 4, |
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140 | 'sample_rate' => 4, |
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141 | 'channels' => 1, |
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142 | 'lossless' => 1, |
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143 | 'joint_stereo' => 1, |
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144 | 'number_taps' => 2, |
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145 | 'downsampling_ratio' => 1, |
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146 | 'samples_per_packet' => 2 |
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147 | ) |
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148 | ); |
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149 | |
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150 | $info_bonk_BONK['lossless'] = (bool)$info_bonk_BONK['lossless']; |
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151 | $info_bonk_BONK['joint_stereo'] = (bool)$info_bonk_BONK['joint_stereo']; |
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152 | |
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153 | $getid3->info['avdataoffset'] = $info_bonk_BONK['offset'] + 5 + 17; |
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154 | $getid3->info['avdataend'] = $info_bonk_BONK['offset'] + $info_bonk_BONK['size']; |
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155 | |
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156 | $getid3->info['fileformat'] = 'bonk'; |
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157 | $info_audio['dataformat'] = 'bonk'; |
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158 | $info_audio['bitrate_mode'] = 'vbr'; // assumed |
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159 | $info_audio['channels'] = $info_bonk_BONK['channels']; |
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160 | $info_audio['sample_rate'] = $info_bonk_BONK['sample_rate']; |
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161 | $info_audio['channelmode'] = $info_bonk_BONK['joint_stereo'] ? 'joint stereo' : 'stereo'; |
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162 | $info_audio['lossless'] = $info_bonk_BONK['lossless']; |
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163 | $info_audio['codec'] = 'bonk'; |
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164 | |
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165 | $getid3->info['playtime_seconds'] = $info_bonk_BONK['number_samples'] / ($info_bonk_BONK['sample_rate'] * $info_bonk_BONK['channels']); |
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166 | if ($getid3->info['playtime_seconds'] > 0) { |
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167 | $info_audio['bitrate'] = (($getid3->info['bonk']['dataend'] - $getid3->info['bonk']['dataoffset']) * 8) / $getid3->info['playtime_seconds']; |
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168 | } |
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169 | break; |
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170 | |
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171 | case 'INFO': |
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172 | // shortcut |
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173 | $info_bonk_INFO = &$getid3->info['bonk']['INFO']; |
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174 | |
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175 | $info_bonk_INFO['version'] = getid3_lib::LittleEndian2Int(fread($getid3->fp, 1)); |
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176 | $info_bonk_INFO['entries_count'] = 0; |
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177 | $next_info_data_pair = fread($getid3->fp, 5); |
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178 | if (!getid3_bonk::BonkIsValidTagName(substr($next_info_data_pair, 1, 4))) { |
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179 | while (!feof($getid3->fp)) { |
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180 | $next_info_data_pair = fread($getid3->fp, 5); |
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181 | if (getid3_bonk::BonkIsValidTagName(substr($next_info_data_pair, 1, 4))) { |
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182 | fseek($getid3->fp, -5, SEEK_CUR); |
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183 | break; |
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184 | } |
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185 | $info_bonk_INFO['entries_count']++; |
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186 | } |
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187 | } |
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188 | break; |
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189 | |
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190 | case 'META': |
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191 | $bonk_data = "\x00".'META'.fread($getid3->fp, $getid3->info['bonk']['META']['size'] - 5); |
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192 | $getid3->info['bonk']['META']['version'] = getid3_lib::LittleEndian2Int(substr($bonk_data, 5, 1)); |
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193 | |
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194 | $meta_tag_entries = floor(((strlen($bonk_data) - 8) - 6) / 8); // BonkData - xxxxmeta - ØMETA |
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195 | $offset = 6; |
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196 | for ($i = 0; $i < $meta_tag_entries; $i++) { |
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197 | $meta_entry_tag_name = substr($bonk_data, $offset, 4); |
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198 | $offset += 4; |
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199 | $meta_entry_tag_offset = getid3_lib::LittleEndian2Int(substr($bonk_data, $offset, 4)); |
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200 | $offset += 4; |
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201 | $getid3->info['bonk']['META']['tags'][$meta_entry_tag_name] = $meta_entry_tag_offset; |
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202 | } |
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203 | break; |
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204 | |
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205 | case ' ID3': |
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206 | $info_audio['encoder'] = 'Extended BONK v0.9+'; |
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207 | |
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208 | // ID3v2 checking is optional |
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209 | if (class_exists('getid3_id3v2')) { |
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210 | |
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211 | $id3v2 = new getid3_id3v2($getid3); |
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212 | $id3v2->option_starting_offset = $getid3->info['bonk'][' ID3']['offset'] + 2; |
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213 | $getid3->info['bonk'][' ID3']['valid'] = $id3v2->Analyze(); |
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214 | } |
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215 | break; |
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216 | |
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217 | default: |
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218 | $getid3->warning('Unexpected Bonk tag "'.$bonk_tag_name.'" at offset '.$getid3->info['bonk'][$bonk_tag_name]['offset']); |
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219 | break; |
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220 | |
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221 | } |
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222 | } |
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223 | |
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224 | |
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225 | |
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226 | public static function BonkIsValidTagName($possible_bonk_tag, $ignore_case=false) { |
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227 | |
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228 | $ignore_case = $ignore_case ? 'i' : ''; |
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229 | return preg_match('/^(BONK|INFO| ID3|META)$/'.$ignore_case, $possible_bonk_tag); |
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230 | } |
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231 | |
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232 | } |
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233 | |
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234 | |
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235 | ?> |
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