Mercurial > judyates
view e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.bonk.php @ 13:f16185fe9ed9 judyates
[svn r14]
| author | rlm |
|---|---|
| date | Mon, 12 Apr 2010 03:30:00 -0400 |
| parents | 3f6b44aa6b35 |
| children |
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1 <?php2 // +----------------------------------------------------------------------+3 // | PHP version 5 |4 // +----------------------------------------------------------------------+5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |6 // +----------------------------------------------------------------------+7 // | This source file is subject to version 2 of the GPL license, |8 // | that is bundled with this package in the file license.txt and is |9 // | available through the world-wide-web at the following url: |10 // | http://www.gnu.org/copyleft/gpl.html |11 // +----------------------------------------------------------------------+12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |13 // +----------------------------------------------------------------------+14 // | Authors: James Heinrich <infoØgetid3*org> |15 // | Allan Hansen <ahØartemis*dk> |16 // +----------------------------------------------------------------------+17 // | module.audio.bonk.php |18 // | Module for analyzing BONK audio files |19 // | dependencies: module.tag.id3v2.php (optional) |20 // +----------------------------------------------------------------------+21 //22 // $Id: module.audio.bonk.php,v 1.3 2006/11/02 10:48:01 ah Exp $26 class getid3_bonk extends getid3_handler27 {29 public function Analyze() {31 $getid3 = $this->getid3;33 $getid3->info['bonk'] = array ();34 $info_bonk = &$getid3->info['bonk'];36 $info_bonk['dataoffset'] = $getid3->info['avdataoffset'];37 $info_bonk['dataend'] = $getid3->info['avdataend'];40 // Scan-from-end method, for v0.6 and higher41 fseek($getid3->fp, $info_bonk['dataend'] - 8, SEEK_SET);42 $possible_bonk_tag = fread($getid3->fp, 8);43 while (getid3_bonk::BonkIsValidTagName(substr($possible_bonk_tag, 4, 4), true)) {44 $bonk_tag_size = getid3_lib::LittleEndian2Int(substr($possible_bonk_tag, 0, 4));45 fseek($getid3->fp, 0 - $bonk_tag_size, SEEK_CUR);46 $bonk_tag_offset = ftell($getid3->fp);47 $tag_header_test = fread($getid3->fp, 5);48 if (($tag_header_test{0} != "\x00") || (substr($possible_bonk_tag, 4, 4) != strtolower(substr($possible_bonk_tag, 4, 4)))) {49 throw new getid3_exception('Expecting "Ø'.strtoupper(substr($possible_bonk_tag, 4, 4)).'" at offset '.$bonk_tag_offset.', found "'.$tag_header_test.'"');50 }51 $bonk_tag_name = substr($tag_header_test, 1, 4);53 $info_bonk[$bonk_tag_name]['size'] = $bonk_tag_size;54 $info_bonk[$bonk_tag_name]['offset'] = $bonk_tag_offset;55 $this->HandleBonkTags($bonk_tag_name);57 $next_tag_end_offset = $bonk_tag_offset - 8;58 if ($next_tag_end_offset < $info_bonk['dataoffset']) {59 if (empty($getid3->info['audio']['encoder'])) {60 $getid3->info['audio']['encoder'] = 'Extended BONK v0.9+';61 }62 return true;63 }64 fseek($getid3->fp, $next_tag_end_offset, SEEK_SET);65 $possible_bonk_tag = fread($getid3->fp, 8);66 }68 // Seek-from-beginning method for v0.4 and v0.569 if (empty($info_bonk['BONK'])) {70 fseek($getid3->fp, $info_bonk['dataoffset'], SEEK_SET);71 do {72 $tag_header_test = fread($getid3->fp, 5);73 switch ($tag_header_test) {74 case "\x00".'BONK':75 if (empty($getid3->info['audio']['encoder'])) {76 $getid3->info['audio']['encoder'] = 'BONK v0.4';77 }78 break;80 case "\x00".'INFO':81 $getid3->info['audio']['encoder'] = 'Extended BONK v0.5';82 break;84 default:85 break 2;86 }87 $bonk_tag_name = substr($tag_header_test, 1, 4);88 $info_bonk[$bonk_tag_name]['size'] = $info_bonk['dataend'] - $info_bonk['dataoffset'];89 $info_bonk[$bonk_tag_name]['offset'] = $info_bonk['dataoffset'];90 $this->HandleBonkTags($bonk_tag_name);92 } while (true);93 }96 // Parse META block for v0.6 - v0.897 if (!@$info_bonk['INFO'] && isset($info_bonk['META']['tags']['info'])) {98 fseek($getid3->fp, $info_bonk['META']['tags']['info'], SEEK_SET);99 $tag_header_test = fread($getid3->fp, 5);100 if ($tag_header_test == "\x00".'INFO') {101 $getid3->info['audio']['encoder'] = 'Extended BONK v0.6 - v0.8';103 $bonk_tag_name = substr($tag_header_test, 1, 4);104 $info_bonk[$bonk_tag_name]['size'] = $info_bonk['dataend'] - $info_bonk['dataoffset'];105 $info_bonk[$bonk_tag_name]['offset'] = $info_bonk['dataoffset'];106 $this->HandleBonkTags($bonk_tag_name);107 }108 }110 if (empty($getid3->info['audio']['encoder'])) {111 $getid3->info['audio']['encoder'] = 'Extended BONK v0.9+';112 }113 if (empty($info_bonk['BONK'])) {114 unset($getid3->info['bonk']);115 }116 return true;118 }122 private function HandleBonkTags(&$bonk_tag_name) {124 // Shortcut to getid3 pointer125 $getid3 = $this->getid3;126 $info_audio = &$getid3->info['audio'];128 switch ($bonk_tag_name) {130 case 'BONK':131 // shortcut132 $info_bonk_BONK = &$getid3->info['bonk']['BONK'];134 $bonk_data = "\x00".'BONK'.fread($getid3->fp, 17);136 getid3_lib::ReadSequence('LittleEndian2Int', $info_bonk_BONK, $bonk_data, 5,137 array (138 'version' => 1,139 'number_samples' => 4,140 'sample_rate' => 4,141 'channels' => 1,142 'lossless' => 1,143 'joint_stereo' => 1,144 'number_taps' => 2,145 'downsampling_ratio' => 1,146 'samples_per_packet' => 2147 )148 );150 $info_bonk_BONK['lossless'] = (bool)$info_bonk_BONK['lossless'];151 $info_bonk_BONK['joint_stereo'] = (bool)$info_bonk_BONK['joint_stereo'];153 $getid3->info['avdataoffset'] = $info_bonk_BONK['offset'] + 5 + 17;154 $getid3->info['avdataend'] = $info_bonk_BONK['offset'] + $info_bonk_BONK['size'];156 $getid3->info['fileformat'] = 'bonk';157 $info_audio['dataformat'] = 'bonk';158 $info_audio['bitrate_mode'] = 'vbr'; // assumed159 $info_audio['channels'] = $info_bonk_BONK['channels'];160 $info_audio['sample_rate'] = $info_bonk_BONK['sample_rate'];161 $info_audio['channelmode'] = $info_bonk_BONK['joint_stereo'] ? 'joint stereo' : 'stereo';162 $info_audio['lossless'] = $info_bonk_BONK['lossless'];163 $info_audio['codec'] = 'bonk';165 $getid3->info['playtime_seconds'] = $info_bonk_BONK['number_samples'] / ($info_bonk_BONK['sample_rate'] * $info_bonk_BONK['channels']);166 if ($getid3->info['playtime_seconds'] > 0) {167 $info_audio['bitrate'] = (($getid3->info['bonk']['dataend'] - $getid3->info['bonk']['dataoffset']) * 8) / $getid3->info['playtime_seconds'];168 }169 break;171 case 'INFO':172 // shortcut173 $info_bonk_INFO = &$getid3->info['bonk']['INFO'];175 $info_bonk_INFO['version'] = getid3_lib::LittleEndian2Int(fread($getid3->fp, 1));176 $info_bonk_INFO['entries_count'] = 0;177 $next_info_data_pair = fread($getid3->fp, 5);178 if (!getid3_bonk::BonkIsValidTagName(substr($next_info_data_pair, 1, 4))) {179 while (!feof($getid3->fp)) {180 $next_info_data_pair = fread($getid3->fp, 5);181 if (getid3_bonk::BonkIsValidTagName(substr($next_info_data_pair, 1, 4))) {182 fseek($getid3->fp, -5, SEEK_CUR);183 break;184 }185 $info_bonk_INFO['entries_count']++;186 }187 }188 break;190 case 'META':191 $bonk_data = "\x00".'META'.fread($getid3->fp, $getid3->info['bonk']['META']['size'] - 5);192 $getid3->info['bonk']['META']['version'] = getid3_lib::LittleEndian2Int(substr($bonk_data, 5, 1));194 $meta_tag_entries = floor(((strlen($bonk_data) - 8) - 6) / 8); // BonkData - xxxxmeta - ØMETA195 $offset = 6;196 for ($i = 0; $i < $meta_tag_entries; $i++) {197 $meta_entry_tag_name = substr($bonk_data, $offset, 4);198 $offset += 4;199 $meta_entry_tag_offset = getid3_lib::LittleEndian2Int(substr($bonk_data, $offset, 4));200 $offset += 4;201 $getid3->info['bonk']['META']['tags'][$meta_entry_tag_name] = $meta_entry_tag_offset;202 }203 break;205 case ' ID3':206 $info_audio['encoder'] = 'Extended BONK v0.9+';208 // ID3v2 checking is optional209 if (class_exists('getid3_id3v2')) {211 $id3v2 = new getid3_id3v2($getid3);212 $id3v2->option_starting_offset = $getid3->info['bonk'][' ID3']['offset'] + 2;213 $getid3->info['bonk'][' ID3']['valid'] = $id3v2->Analyze();214 }215 break;217 default:218 $getid3->warning('Unexpected Bonk tag "'.$bonk_tag_name.'" at offset '.$getid3->info['bonk'][$bonk_tag_name]['offset']);219 break;221 }222 }226 public static function BonkIsValidTagName($possible_bonk_tag, $ignore_case=false) {228 $ignore_case = $ignore_case ? 'i' : '';229 return preg_match('/^(BONK|INFO| ID3|META)$/'.$ignore_case, $possible_bonk_tag);230 }232 }235 ?>