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.wavpack.php | |
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18 | // | module for analyzing WavPack v4.0+ Audio files | |
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19 | // | dependencies: audio-video.riff | |
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20 | // +----------------------------------------------------------------------+ |
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21 | // |
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22 | // $Id: module.audio.wavpack.php 3318 2009-05-20 21:54:10Z vdigital $ |
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23 | |
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24 | |
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25 | class getid3_wavpack extends getid3_handler |
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26 | { |
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27 | |
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28 | public function Analyze() { |
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29 | |
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30 | $getid3 = $this->getid3; |
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31 | |
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32 | $getid3->include_module('audio-video.riff'); |
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33 | |
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34 | $getid3->info['wavpack'] = array (); |
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35 | $info_wavpack = &$getid3->info['wavpack']; |
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36 | |
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37 | fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); |
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38 | |
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39 | while (true) { |
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40 | |
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41 | $wavpack_header = fread($getid3->fp, 32); |
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42 | |
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43 | if (ftell($getid3->fp) >= $getid3->info['avdataend']) { |
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44 | break; |
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45 | } elseif (feof($getid3->fp)) { |
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46 | break; |
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47 | } elseif ( |
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48 | (@$info_wavpack_blockheader['total_samples'] > 0) && |
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49 | (@$info_wavpack_blockheader['block_samples'] > 0) && |
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50 | (!isset($info_wavpack['riff_trailer_size']) || ($info_wavpack['riff_trailer_size'] <= 0)) && |
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51 | ((@$info_wavpack['config_flags']['md5_checksum'] === false) || !empty($getid3->info['md5_data_source']))) { |
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52 | break; |
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53 | } |
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54 | |
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55 | $block_header_offset = ftell($getid3->fp) - 32; |
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56 | $block_header_magic = substr($wavpack_header, 0, 4); |
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57 | $block_header_size = getid3_lib::LittleEndian2Int(substr($wavpack_header, 4, 4)); |
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58 | |
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59 | if ($block_header_magic != 'wvpk') { |
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60 | throw new getid3_exception('Expecting "wvpk" at offset '.$block_header_offset.', found "'.$block_header_magic.'"'); |
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61 | } |
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62 | |
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63 | if ((@$info_wavpack_blockheader['block_samples'] <= 0) || (@$info_wavpack_blockheader['total_samples'] <= 0)) { |
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64 | |
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65 | // Also, it is possible that the first block might not have |
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66 | // any samples (block_samples == 0) and in this case you should skip blocks |
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67 | // until you find one with samples because the other information (like |
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68 | // total_samples) are not guaranteed to be correct until (block_samples > 0) |
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69 | |
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70 | // Finally, I have defined a format for files in which the length is not known |
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71 | // (for example when raw files are created using pipes). In these cases |
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72 | // total_samples will be -1 and you must seek to the final block to determine |
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73 | // the total number of samples. |
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74 | |
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75 | |
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76 | $getid3->info['audio']['dataformat'] = 'wavpack'; |
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77 | $getid3->info['fileformat'] = 'wavpack'; |
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78 | $getid3->info['audio']['lossless'] = true; |
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79 | $getid3->info['audio']['bitrate_mode'] = 'vbr'; |
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80 | |
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81 | $info_wavpack['blockheader']['offset'] = $block_header_offset; |
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82 | $info_wavpack['blockheader']['magic'] = $block_header_magic; |
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83 | $info_wavpack['blockheader']['size'] = $block_header_size; |
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84 | $info_wavpack_blockheader = &$info_wavpack['blockheader']; |
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85 | |
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86 | if ($info_wavpack_blockheader['size'] >= 0x100000) { |
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87 | throw new getid3_exception('Expecting WavPack block size less than "0x100000", found "'.$info_wavpack_blockheader['size'].'" at offset '.$info_wavpack_blockheader['offset']); |
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88 | } |
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89 | |
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90 | $info_wavpack_blockheader['minor_version'] = ord($wavpack_header{8}); |
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91 | $info_wavpack_blockheader['major_version'] = ord($wavpack_header{9}); |
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92 | |
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93 | if (($info_wavpack_blockheader['major_version'] != 4) || |
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94 | (($info_wavpack_blockheader['minor_version'] < 4) && |
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95 | ($info_wavpack_blockheader['minor_version'] > 16))) { |
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96 | throw new getid3_exception('Expecting WavPack version between "4.2" and "4.16", found version "'.$info_wavpack_blockheader['major_version'].'.'.$info_wavpack_blockheader['minor_version'].'" at offset '.$info_wavpack_blockheader['offset']); |
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97 | } |
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98 | |
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99 | $info_wavpack_blockheader['track_number'] = ord($wavpack_header{10}); // unused |
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100 | $info_wavpack_blockheader['index_number'] = ord($wavpack_header{11}); // unused |
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101 | |
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102 | getid3_lib::ReadSequence('LittleEndian2Int', $info_wavpack_blockheader, $wavpack_header, 12, |
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103 | array ( |
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104 | 'total_samples' => 4, |
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105 | 'block_index' => 4, |
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106 | 'block_samples' => 4, |
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107 | 'flags_raw' => 4, |
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108 | 'crc' => 4 |
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109 | ) |
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110 | ); |
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111 | |
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112 | |
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113 | $info_wavpack_blockheader['flags']['bytes_per_sample'] = 1 + ($info_wavpack_blockheader['flags_raw'] & 0x00000003); |
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114 | $info_wavpack_blockheader['flags']['mono'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000004); |
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115 | $info_wavpack_blockheader['flags']['hybrid'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000008); |
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116 | $info_wavpack_blockheader['flags']['joint_stereo'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000010); |
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117 | $info_wavpack_blockheader['flags']['cross_decorrelation'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000020); |
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118 | $info_wavpack_blockheader['flags']['hybrid_noiseshape'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000040); |
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119 | $info_wavpack_blockheader['flags']['ieee_32bit_float'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000080); |
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120 | $info_wavpack_blockheader['flags']['int_32bit'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000100); |
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121 | $info_wavpack_blockheader['flags']['hybrid_bitrate_noise'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000200); |
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122 | $info_wavpack_blockheader['flags']['hybrid_balance_noise'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000400); |
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123 | $info_wavpack_blockheader['flags']['multichannel_initial'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00000800); |
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124 | $info_wavpack_blockheader['flags']['multichannel_final'] = (bool) ($info_wavpack_blockheader['flags_raw'] & 0x00001000); |
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125 | |
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126 | $getid3->info['audio']['lossless'] = !$info_wavpack_blockheader['flags']['hybrid']; |
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127 | } |
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128 | |
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129 | |
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130 | while (!feof($getid3->fp) && (ftell($getid3->fp) < ($block_header_offset + $block_header_size + 8))) { |
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131 | |
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132 | $metablock = array('offset'=>ftell($getid3->fp)); |
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133 | $metablockheader = fread($getid3->fp, 2); |
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134 | if (feof($getid3->fp)) { |
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135 | break; |
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136 | } |
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137 | $metablock['id'] = ord($metablockheader{0}); |
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138 | $metablock['function_id'] = ($metablock['id'] & 0x3F); |
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139 | $metablock['function_name'] = $this->WavPackMetablockNameLookup($metablock['function_id']); |
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140 | |
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141 | // The 0x20 bit in the id of the meta subblocks (which is defined as |
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142 | // ID_OPTIONAL_DATA) is a permanent part of the id. The idea is that |
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143 | // if a decoder encounters an id that it does not know about, it uses |
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144 | // that "ID_OPTIONAL_DATA" flag to determine what to do. If it is set |
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145 | // then the decoder simply ignores the metadata, but if it is zero |
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146 | // then the decoder should quit because it means that an understanding |
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147 | // of the metadata is required to correctly decode the audio. |
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148 | |
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149 | $metablock['non_decoder'] = (bool) ($metablock['id'] & 0x20); |
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150 | $metablock['padded_data'] = (bool) ($metablock['id'] & 0x40); |
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151 | $metablock['large_block'] = (bool) ($metablock['id'] & 0x80); |
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152 | if ($metablock['large_block']) { |
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153 | $metablockheader .= fread($getid3->fp, 2); |
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154 | } |
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155 | $metablock['size'] = getid3_lib::LittleEndian2Int(substr($metablockheader, 1)) * 2; // size is stored in words |
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156 | $metablock['data'] = null; |
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157 | |
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158 | if ($metablock['size'] > 0) { |
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159 | |
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160 | switch ($metablock['function_id']) { |
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161 | |
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162 | case 0x21: // ID_RIFF_HEADER |
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163 | case 0x22: // ID_RIFF_TRAILER |
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164 | case 0x23: // ID_REPLAY_GAIN |
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165 | case 0x24: // ID_CUESHEET |
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166 | case 0x25: // ID_CONFIG_BLOCK |
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167 | case 0x26: // ID_MD5_CHECKSUM |
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168 | $metablock['data'] = fread($getid3->fp, $metablock['size']); |
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169 | |
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170 | if ($metablock['padded_data']) { |
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171 | // padded to the nearest even byte |
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172 | $metablock['size']--; |
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173 | $metablock['data'] = substr($metablock['data'], 0, -1); |
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174 | } |
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175 | break; |
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176 | |
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177 | |
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178 | case 0x00: // ID_DUMMY |
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179 | case 0x01: // ID_ENCODER_INFO |
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180 | case 0x02: // ID_DECORR_TERMS |
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181 | case 0x03: // ID_DECORR_WEIGHTS |
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182 | case 0x04: // ID_DECORR_SAMPLES |
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183 | case 0x05: // ID_ENTROPY_VARS |
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184 | case 0x06: // ID_HYBRID_PROFILE |
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185 | case 0x07: // ID_SHAPING_WEIGHTS |
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186 | case 0x08: // ID_FLOAT_INFO |
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187 | case 0x09: // ID_INT32_INFO |
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188 | case 0x0A: // ID_WV_BITSTREAM |
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189 | case 0x0B: // ID_WVC_BITSTREAM |
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190 | case 0x0C: // ID_WVX_BITSTREAM |
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191 | case 0x0D: // ID_CHANNEL_INFO |
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192 | fseek($getid3->fp, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET); |
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193 | break; |
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194 | |
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195 | |
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196 | default: |
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197 | $getid3->warning('Unexpected metablock type "0x'.str_pad(dechex($metablock['function_id']), 2, '0', STR_PAD_LEFT).'" at offset '.$metablock['offset']); |
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198 | fseek($getid3->fp, $metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size'], SEEK_SET); |
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199 | break; |
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200 | } |
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201 | |
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202 | |
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203 | switch ($metablock['function_id']) { |
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204 | |
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205 | case 0x21: // ID_RIFF_HEADER |
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206 | |
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207 | $original_wav_filesize = getid3_lib::LittleEndian2Int(substr($metablock['data'], 4, 4)); |
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208 | |
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209 | // Clone getid3 |
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210 | $clone = clone $getid3; |
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211 | |
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212 | // Analyze clone by string |
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213 | $riff = new getid3_riff($clone); |
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214 | $riff->AnalyzeString($metablock['data']); |
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215 | |
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216 | // Import from clone and destroy |
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217 | $metablock['riff'] = $clone->info['riff']; |
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218 | $getid3->warnings($clone->warnings()); |
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219 | unset($clone); |
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220 | |
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221 | // Save RIFF header - we may need it later for RIFF footer parsing |
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222 | $this->riff_header = $metablock['data']; |
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223 | |
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224 | $metablock['riff']['original_filesize'] = $original_wav_filesize; |
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225 | $info_wavpack['riff_trailer_size'] = $original_wav_filesize - $metablock['riff']['WAVE']['data'][0]['size'] - $metablock['riff']['header_size']; |
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226 | |
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227 | $getid3->info['audio']['sample_rate'] = $metablock['riff']['raw']['fmt ']['nSamplesPerSec']; |
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228 | $getid3->info['playtime_seconds'] = $info_wavpack_blockheader['total_samples'] / $getid3->info['audio']['sample_rate']; |
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229 | |
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230 | // Safe RIFF header in case there's a RIFF footer later |
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231 | $metablock_riff_header = $metablock['data']; |
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232 | break; |
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233 | |
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234 | |
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235 | case 0x22: // ID_RIFF_TRAILER |
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236 | |
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237 | $metablock_riff_footer = $metablock_riff_header.$metablock['data']; |
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238 | |
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239 | $start_offset = $metablock['offset'] + ($metablock['large_block'] ? 4 : 2); |
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240 | |
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241 | $ftell_old = ftell($getid3->fp); |
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242 | |
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243 | // Clone getid3 |
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244 | $clone = clone $getid3; |
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245 | |
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246 | // Call public method that really should be private |
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247 | $riff = new getid3_riff($clone); |
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248 | $metablock['riff'] = $riff->ParseRIFF($start_offset, $start_offset + $metablock['size']); |
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249 | unset($clone); |
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250 | |
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251 | fseek($getid3->fp, $ftell_old, SEEK_SET); |
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252 | |
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253 | if (!empty($metablock['riff']['INFO'])) { |
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254 | getid3_riff::RIFFCommentsParse($metablock['riff']['INFO'], $metablock['comments']); |
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255 | $getid3->info['tags']['riff'] = $metablock['comments']; |
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256 | } |
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257 | break; |
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258 | |
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259 | |
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260 | case 0x23: // ID_REPLAY_GAIN |
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261 | $getid3->warning('WavPack "Replay Gain" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']); |
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262 | break; |
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263 | |
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264 | |
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265 | case 0x24: // ID_CUESHEET |
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266 | $getid3->warning('WavPack "Cuesheet" contents not yet handled by getID3() in metablock at offset '.$metablock['offset']); |
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267 | break; |
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268 | |
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269 | |
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270 | case 0x25: // ID_CONFIG_BLOCK |
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271 | $metablock['flags_raw'] = getid3_lib::LittleEndian2Int(substr($metablock['data'], 0, 3)); |
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272 | |
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273 | $metablock['flags']['adobe_mode'] = (bool) ($metablock['flags_raw'] & 0x000001); // "adobe" mode for 32-bit floats |
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274 | $metablock['flags']['fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000002); // fast mode |
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275 | $metablock['flags']['very_fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000004); // double fast |
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276 | $metablock['flags']['high_flag'] = (bool) ($metablock['flags_raw'] & 0x000008); // high quality mode |
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277 | $metablock['flags']['very_high_flag'] = (bool) ($metablock['flags_raw'] & 0x000010); // double high (not used yet) |
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278 | $metablock['flags']['bitrate_kbps'] = (bool) ($metablock['flags_raw'] & 0x000020); // bitrate is kbps, not bits / sample |
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279 | $metablock['flags']['auto_shaping'] = (bool) ($metablock['flags_raw'] & 0x000040); // automatic noise shaping |
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280 | $metablock['flags']['shape_override'] = (bool) ($metablock['flags_raw'] & 0x000080); // shaping mode specified |
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281 | $metablock['flags']['joint_override'] = (bool) ($metablock['flags_raw'] & 0x000100); // joint-stereo mode specified |
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282 | $metablock['flags']['copy_time'] = (bool) ($metablock['flags_raw'] & 0x000200); // copy file-time from source |
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283 | $metablock['flags']['create_exe'] = (bool) ($metablock['flags_raw'] & 0x000400); // create executable |
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284 | $metablock['flags']['create_wvc'] = (bool) ($metablock['flags_raw'] & 0x000800); // create correction file |
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285 | $metablock['flags']['optimize_wvc'] = (bool) ($metablock['flags_raw'] & 0x001000); // maximize bybrid compression |
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286 | $metablock['flags']['quality_mode'] = (bool) ($metablock['flags_raw'] & 0x002000); // psychoacoustic quality mode |
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287 | $metablock['flags']['raw_flag'] = (bool) ($metablock['flags_raw'] & 0x004000); // raw mode (not implemented yet) |
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288 | $metablock['flags']['calc_noise'] = (bool) ($metablock['flags_raw'] & 0x008000); // calc noise in hybrid mode |
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289 | $metablock['flags']['lossy_mode'] = (bool) ($metablock['flags_raw'] & 0x010000); // obsolete (for information) |
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290 | $metablock['flags']['extra_mode'] = (bool) ($metablock['flags_raw'] & 0x020000); // extra processing mode |
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291 | $metablock['flags']['skip_wvx'] = (bool) ($metablock['flags_raw'] & 0x040000); // no wvx stream w/ floats & big ints |
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292 | $metablock['flags']['md5_checksum'] = (bool) ($metablock['flags_raw'] & 0x080000); // compute & store MD5 signature |
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293 | $metablock['flags']['quiet_mode'] = (bool) ($metablock['flags_raw'] & 0x100000); // don't report progress % |
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294 | |
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295 | $info_wavpack['config_flags'] = $metablock['flags']; |
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296 | |
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297 | $getid3->info['audio']['encoder_options'] = trim( |
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298 | ($info_wavpack_blockheader['flags']['hybrid'] ? ' -b???' : '') . |
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299 | ($metablock['flags']['adobe_mode'] ? ' -a' : '') . |
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300 | ($metablock['flags']['optimize_wvc'] ? ' -cc' : '') . |
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301 | ($metablock['flags']['create_exe'] ? ' -e' : '') . |
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302 | ($metablock['flags']['fast_flag'] ? ' -f' : '') . |
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303 | ($metablock['flags']['joint_override'] ? ' -j?' : '') . |
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304 | ($metablock['flags']['high_flag'] ? ' -h' : '') . |
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305 | ($metablock['flags']['md5_checksum'] ? ' -m' : '') . |
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306 | ($metablock['flags']['calc_noise'] ? ' -n' : '') . |
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307 | ($metablock['flags']['shape_override'] ? ' -s?' : '') . |
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308 | ($metablock['flags']['extra_mode'] ? ' -x?' : '') |
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309 | ); |
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310 | if (!$getid3->info['audio']['encoder_options']) { |
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311 | unset($getid3->info['audio']['encoder_options']); |
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312 | } |
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313 | break; |
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314 | |
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315 | |
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316 | case 0x26: // ID_MD5_CHECKSUM |
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317 | if (strlen($metablock['data']) == 16) { |
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318 | $getid3->info['md5_data_source'] = strtolower(getid3_lib::PrintHexBytes($metablock['data'], true, false, false)); |
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319 | } else { |
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320 | $getid3->warning('Expecting 16 bytes of WavPack "MD5 Checksum" in metablock at offset '.$metablock['offset'].', but found '.strlen($metablock['data']).' bytes'); |
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321 | } |
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322 | break; |
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323 | |
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324 | |
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325 | case 0x00: // ID_DUMMY |
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326 | case 0x01: // ID_ENCODER_INFO |
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327 | case 0x02: // ID_DECORR_TERMS |
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328 | case 0x03: // ID_DECORR_WEIGHTS |
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329 | case 0x04: // ID_DECORR_SAMPLES |
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330 | case 0x05: // ID_ENTROPY_VARS |
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331 | case 0x06: // ID_HYBRID_PROFILE |
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332 | case 0x07: // ID_SHAPING_WEIGHTS |
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333 | case 0x08: // ID_FLOAT_INFO |
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334 | case 0x09: // ID_INT32_INFO |
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335 | case 0x0A: // ID_WV_BITSTREAM |
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336 | case 0x0B: // ID_WVC_BITSTREAM |
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337 | case 0x0C: // ID_WVX_BITSTREAM |
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338 | case 0x0D: // ID_CHANNEL_INFO |
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339 | unset($metablock); |
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340 | break; |
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341 | } |
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342 | |
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343 | } |
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344 | |
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345 | if (!empty($metablock)) { |
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346 | $info_wavpack['metablocks'][] = $metablock; |
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347 | } |
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348 | |
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349 | } |
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350 | |
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351 | } |
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352 | |
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353 | $getid3->info['audio']['encoder'] = 'WavPack v'.$info_wavpack_blockheader['major_version'].'.'.str_pad($info_wavpack_blockheader['minor_version'], 2, '0', STR_PAD_LEFT); |
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354 | $getid3->info['audio']['bits_per_sample'] = $info_wavpack_blockheader['flags']['bytes_per_sample'] * 8; |
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355 | $getid3->info['audio']['channels'] = ($info_wavpack_blockheader['flags']['mono'] ? 1 : 2); |
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356 | |
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357 | if (@$getid3->info['playtime_seconds']) { |
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358 | $getid3->info['audio']['bitrate'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $getid3->info['playtime_seconds']; |
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359 | } else { |
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360 | $getid3->info['audio']['dataformat'] = 'wvc'; |
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361 | } |
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362 | |
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363 | return true; |
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364 | } |
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365 | |
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366 | |
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367 | |
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368 | public static function WavPackMetablockNameLookup($id) { |
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369 | |
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370 | static $lookup = array( |
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371 | 0x00 => 'Dummy', |
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372 | 0x01 => 'Encoder Info', |
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373 | 0x02 => 'Decorrelation Terms', |
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374 | 0x03 => 'Decorrelation Weights', |
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375 | 0x04 => 'Decorrelation Samples', |
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376 | 0x05 => 'Entropy Variables', |
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377 | 0x06 => 'Hybrid Profile', |
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378 | 0x07 => 'Shaping Weights', |
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379 | 0x08 => 'Float Info', |
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380 | 0x09 => 'Int32 Info', |
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381 | 0x0A => 'WV Bitstream', |
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382 | 0x0B => 'WVC Bitstream', |
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383 | 0x0C => 'WVX Bitstream', |
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384 | 0x0D => 'Channel Info', |
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385 | 0x21 => 'RIFF header', |
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386 | 0x22 => 'RIFF trailer', |
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387 | 0x23 => 'Replay Gain', |
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388 | 0x24 => 'Cuesheet', |
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389 | 0x25 => 'Config Block', |
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390 | 0x26 => 'MD5 Checksum', |
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391 | ); |
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392 | |
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393 | return (@$lookup[$id]); |
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394 | } |
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395 | |
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396 | } |
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397 | |
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398 | |
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399 | ?> |
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