PageRenderTime 54ms CodeModel.GetById 23ms RepoModel.GetById 0ms app.codeStats 0ms

/modules/getid3/module.tag.apetag.php

https://gitlab.com/x33n/ampache
PHP | 416 lines | 350 code | 39 blank | 27 comment | 50 complexity | b7777cfa018c2d8cc7c2490e1e5153c4 MD5 | raw file
    

  1. <?php
    2. 

  2. /////////////////////////////////////////////////////////////////
    3. 

  3. /// getID3() by James Heinrich <info@getid3.org>               //
    4. 

  4. //  available at http://getid3.sourceforge.net                 //
    5. 

  5. //            or http://www.getid3.org                         //
    6. 

  6. //          also https://github.com/JamesHeinrich/getID3       //
    7. 

  7. /////////////////////////////////////////////////////////////////
    8. 

  8. // See readme.txt for more details                             //
    9. 

  9. /////////////////////////////////////////////////////////////////
    10. 

  10. //                                                             //
    11. 

  11. // module.tag.apetag.php                                       //
    12. 

  12. // module for analyzing APE tags                               //
    13. 

  13. // dependencies: NONE                                          //
    14. 

  14. //                                                            ///
    15. 

  15. /////////////////////////////////////////////////////////////////
    16. 

  16. 

  17. class getid3_apetag extends getid3_handler
    18. 

  18. {
    19. 

  19. 	public $inline_attachments = true; // true: return full data for all attachments; false: return no data for all attachments; integer: return data for attachments <= than this; string: save as file to this directory
    20. 

  20. 	public $overrideendoffset  = 0;
    21. 

  21. 

  22. 	public function Analyze() {
    23. 

  23. 		$info = &$this->getid3->info;
    24. 

  24. 

  25. 		if (!getid3_lib::intValueSupported($info['filesize'])) {
    26. 

  26. 			$info['warning'][] = 'Unable to check for APEtags because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB';
    27. 

  27. 			return false;
    28. 

  28. 		}
    29. 

  29. 

  30. 		$id3v1tagsize     = 128;
    31. 

  31. 		$apetagheadersize = 32;
    32. 

  32. 		$lyrics3tagsize   = 10;
    33. 

  33. 

  34. 		if ($this->overrideendoffset == 0) {
    35. 

  35. 

  36. 			$this->fseek(0 - $id3v1tagsize - $apetagheadersize - $lyrics3tagsize, SEEK_END);
    37. 

  37. 			$APEfooterID3v1 = $this->fread($id3v1tagsize + $apetagheadersize + $lyrics3tagsize);
    38. 

  38. 

  39. 			//if (preg_match('/APETAGEX.{24}TAG.{125}$/i', $APEfooterID3v1)) {
    40. 

  40. 			if (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $id3v1tagsize - $apetagheadersize, 8) == 'APETAGEX') {
    41. 

  41. 

  42. 				// APE tag found before ID3v1
    43. 

  43. 				$info['ape']['tag_offset_end'] = $info['filesize'] - $id3v1tagsize;
    44. 

  44. 

  45. 			//} elseif (preg_match('/APETAGEX.{24}$/i', $APEfooterID3v1)) {
    46. 

  46. 			} elseif (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $apetagheadersize, 8) == 'APETAGEX') {
    47. 

  47. 

  48. 				// APE tag found, no ID3v1
    49. 

  49. 				$info['ape']['tag_offset_end'] = $info['filesize'];
    50. 

  50. 

  51. 			}
    52. 

  52. 

  53. 		} else {
    54. 

  54. 

  55. 			$this->fseek($this->overrideendoffset - $apetagheadersize);
    56. 

  56. 			if ($this->fread(8) == 'APETAGEX') {
    57. 

  57. 				$info['ape']['tag_offset_end'] = $this->overrideendoffset;
    58. 

  58. 			}
    59. 

  59. 

  60. 		}
    61. 

  61. 		if (!isset($info['ape']['tag_offset_end'])) {
    62. 

  62. 

  63. 			// APE tag not found
    64. 

  64. 			unset($info['ape']);
    65. 

  65. 			return false;
    66. 

  66. 

  67. 		}
    68. 

  68. 

  69. 		// shortcut
    70. 

  70. 		$thisfile_ape = &$info['ape'];
    71. 

  71. 

  72. 		$this->fseek($thisfile_ape['tag_offset_end'] - $apetagheadersize);
    73. 

  73. 		$APEfooterData = $this->fread(32);
    74. 

  74. 		if (!($thisfile_ape['footer'] = $this->parseAPEheaderFooter($APEfooterData))) {
    75. 

  75. 			$info['error'][] = 'Error parsing APE footer at offset '.$thisfile_ape['tag_offset_end'];
    76. 

  76. 			return false;
    77. 

  77. 		}
    78. 

  78. 

  79. 		if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
    80. 

  80. 			$this->fseek($thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'] - $apetagheadersize);
    81. 

  81. 			$thisfile_ape['tag_offset_start'] = $this->ftell();
    82. 

  82. 			$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize'] + $apetagheadersize);
    83. 

  83. 		} else {
    84. 

  84. 			$thisfile_ape['tag_offset_start'] = $thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'];
    85. 

  85. 			$this->fseek($thisfile_ape['tag_offset_start']);
    86. 

  86. 			$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize']);
    87. 

  87. 		}
    88. 

  88. 		$info['avdataend'] = $thisfile_ape['tag_offset_start'];
    89. 

  89. 

  90. 		if (isset($info['id3v1']['tag_offset_start']) && ($info['id3v1']['tag_offset_start'] < $thisfile_ape['tag_offset_end'])) {
    91. 

  91. 			$info['warning'][] = 'ID3v1 tag information ignored since it appears to be a false synch in APEtag data';
    92. 

  92. 			unset($info['id3v1']);
    93. 

  93. 			foreach ($info['warning'] as $key => $value) {
    94. 

  94. 				if ($value == 'Some ID3v1 fields do not use NULL characters for padding') {
    95. 

  95. 					unset($info['warning'][$key]);
    96. 

  96. 					sort($info['warning']);
    97. 

  97. 					break;
    98. 

  98. 				}
    99. 

  99. 			}
    100. 

  100. 		}
    101. 

  101. 

  102. 		$offset = 0;
    103. 

  103. 		if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
    104. 

  104. 			if ($thisfile_ape['header'] = $this->parseAPEheaderFooter(substr($APEtagData, 0, $apetagheadersize))) {
    105. 

  105. 				$offset += $apetagheadersize;
    106. 

  106. 			} else {
    107. 

  107. 				$info['error'][] = 'Error parsing APE header at offset '.$thisfile_ape['tag_offset_start'];
    108. 

  108. 				return false;
    109. 

  109. 			}
    110. 

  110. 		}
    111. 

  111. 

  112. 		// shortcut
    113. 

  113. 		$info['replay_gain'] = array();
    114. 

  114. 		$thisfile_replaygain = &$info['replay_gain'];
    115. 

  115. 

  116. 		for ($i = 0; $i < $thisfile_ape['footer']['raw']['tag_items']; $i++) {
    117. 

  117. 			$value_size = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
    118. 

  118. 			$offset += 4;
    119. 

  119. 			$item_flags = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
    120. 

  120. 			$offset += 4;
    121. 

  121. 			if (strstr(substr($APEtagData, $offset), "\x00") === false) {
    122. 

  122. 				$info['error'][] = 'Cannot find null-byte (0x00) seperator between ItemKey #'.$i.' and value. ItemKey starts '.$offset.' bytes into the APE tag, at file offset '.($thisfile_ape['tag_offset_start'] + $offset);
    123. 

  123. 				return false;
    124. 

  124. 			}
    125. 

  125. 			$ItemKeyLength = strpos($APEtagData, "\x00", $offset) - $offset;
    126. 

  126. 			$item_key      = strtolower(substr($APEtagData, $offset, $ItemKeyLength));
    127. 

  127. 

  128. 			// shortcut
    129. 

  129. 			$thisfile_ape['items'][$item_key] = array();
    130. 

  130. 			$thisfile_ape_items_current = &$thisfile_ape['items'][$item_key];
    131. 

  131. 

  132. 			$thisfile_ape_items_current['offset'] = $thisfile_ape['tag_offset_start'] + $offset;
    133. 

  133. 

  134. 			$offset += ($ItemKeyLength + 1); // skip 0x00 terminator
    135. 

  135. 			$thisfile_ape_items_current['data'] = substr($APEtagData, $offset, $value_size);
    136. 

  136. 			$offset += $value_size;
    137. 

  137. 

  138. 			$thisfile_ape_items_current['flags'] = $this->parseAPEtagFlags($item_flags);
    139. 

  139. 			switch ($thisfile_ape_items_current['flags']['item_contents_raw']) {
    140. 

  140. 				case 0: // UTF-8
    141. 

  141. 				case 2: // Locator (URL, filename, etc), UTF-8 encoded
    142. 

  142. 					$thisfile_ape_items_current['data'] = explode("\x00", $thisfile_ape_items_current['data']);
    143. 

  143. 					break;
    144. 

  144. 

  145. 				case 1:  // binary data
    146. 

  146. 				default:
    147. 

  147. 					break;
    148. 

  148. 			}
    149. 

  149. 

  150. 			switch (strtolower($item_key)) {
    151. 

  151. 				// http://wiki.hydrogenaud.io/index.php?title=ReplayGain#MP3Gain
    152. 

  152. 				case 'replaygain_track_gain':
    153. 

  153. 					if (preg_match('#^[\\-\\+][0-9\\.,]{8}$#', $thisfile_ape_items_current['data'][0])) {
    154. 

  154. 						$thisfile_replaygain['track']['adjustment'] = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
    155. 

  155. 						$thisfile_replaygain['track']['originator'] = 'unspecified';
    156. 

  156. 					} else {
    157. 

  157. 						$info['warning'][] = 'MP3gainTrackGain value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"';
    158. 

  158. 					}
    159. 

  159. 					break;
    160. 

  160. 

  161. 				case 'replaygain_track_peak':
    162. 

  162. 					if (preg_match('#^[0-9\\.,]{8}$#', $thisfile_ape_items_current['data'][0])) {
    163. 

  163. 						$thisfile_replaygain['track']['peak']       = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
    164. 

  164. 						$thisfile_replaygain['track']['originator'] = 'unspecified';
    165. 

  165. 						if ($thisfile_replaygain['track']['peak'] <= 0) {
    166. 

  166. 							$info['warning'][] = 'ReplayGain Track peak from APEtag appears invalid: '.$thisfile_replaygain['track']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")';
    167. 

  167. 						}
    168. 

  168. 					} else {
    169. 

  169. 						$info['warning'][] = 'MP3gainTrackPeak value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"';
    170. 

  170. 					}
    171. 

  171. 					break;
    172. 

  172. 

  173. 				case 'replaygain_album_gain':
    174. 

  174. 					if (preg_match('#^[\\-\\+][0-9\\.,]{8}$#', $thisfile_ape_items_current['data'][0])) {
    175. 

  175. 						$thisfile_replaygain['album']['adjustment'] = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
    176. 

  176. 						$thisfile_replaygain['album']['originator'] = 'unspecified';
    177. 

  177. 					} else {
    178. 

  178. 						$info['warning'][] = 'MP3gainAlbumGain value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"';
    179. 

  179. 					}
    180. 

  180. 					break;
    181. 

  181. 

  182. 				case 'replaygain_album_peak':
    183. 

  183. 					if (preg_match('#^[0-9\\.,]{8}$#', $thisfile_ape_items_current['data'][0])) {
    184. 

  184. 						$thisfile_replaygain['album']['peak']       = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
    185. 

  185. 						$thisfile_replaygain['album']['originator'] = 'unspecified';
    186. 

  186. 						if ($thisfile_replaygain['album']['peak'] <= 0) {
    187. 

  187. 							$info['warning'][] = 'ReplayGain Album peak from APEtag appears invalid: '.$thisfile_replaygain['album']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")';
    188. 

  188. 						}
    189. 

  189. 					} else {
    190. 

  190. 						$info['warning'][] = 'MP3gainAlbumPeak value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"';
    191. 

  191. 					}
    192. 

  192. 					break;
    193. 

  193. 

  194. 				case 'mp3gain_undo':
    195. 

  195. 					if (preg_match('#^[\\-\\+][0-9]{3},[\\-\\+][0-9]{3},[NW]$#', $thisfile_ape_items_current['data'][0])) {
    196. 

  196. 						list($mp3gain_undo_left, $mp3gain_undo_right, $mp3gain_undo_wrap) = explode(',', $thisfile_ape_items_current['data'][0]);
    197. 

  197. 						$thisfile_replaygain['mp3gain']['undo_left']  = intval($mp3gain_undo_left);
    198. 

  198. 						$thisfile_replaygain['mp3gain']['undo_right'] = intval($mp3gain_undo_right);
    199. 

  199. 						$thisfile_replaygain['mp3gain']['undo_wrap']  = (($mp3gain_undo_wrap == 'Y') ? true : false);
    200. 

  200. 					} else {
    201. 

  201. 						$info['warning'][] = 'MP3gainUndo value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"';
    202. 

  202. 					}
    203. 

  203. 					break;
    204. 

  204. 

  205. 				case 'mp3gain_minmax':
    206. 

  206. 					if (preg_match('#^[0-9]{3},[0-9]{3}$#', $thisfile_ape_items_current['data'][0])) {
    207. 

  207. 						list($mp3gain_globalgain_min, $mp3gain_globalgain_max) = explode(',', $thisfile_ape_items_current['data'][0]);
    208. 

  208. 						$thisfile_replaygain['mp3gain']['globalgain_track_min'] = intval($mp3gain_globalgain_min);
    209. 

  209. 						$thisfile_replaygain['mp3gain']['globalgain_track_max'] = intval($mp3gain_globalgain_max);
    210. 

  210. 					} else {
    211. 

  211. 						$info['warning'][] = 'MP3gainMinMax value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"';
    212. 

  212. 					}
    213. 

  213. 					break;
    214. 

  214. 

  215. 				case 'mp3gain_album_minmax':
    216. 

  216. 					if (preg_match('#^[0-9]{3},[0-9]{3}$#', $thisfile_ape_items_current['data'][0])) {
    217. 

  217. 						list($mp3gain_globalgain_album_min, $mp3gain_globalgain_album_max) = explode(',', $thisfile_ape_items_current['data'][0]);
    218. 

  218. 						$thisfile_replaygain['mp3gain']['globalgain_album_min'] = intval($mp3gain_globalgain_album_min);
    219. 

  219. 						$thisfile_replaygain['mp3gain']['globalgain_album_max'] = intval($mp3gain_globalgain_album_max);
    220. 

  220. 					} else {
    221. 

  221. 						$info['warning'][] = 'MP3gainAlbumMinMax value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"';
    222. 

  222. 					}
    223. 

  223. 					break;
    224. 

  224. 

  225. 				case 'tracknumber':
    226. 

  226. 					if (is_array($thisfile_ape_items_current['data'])) {
    227. 

  227. 						foreach ($thisfile_ape_items_current['data'] as $comment) {
    228. 

  228. 							$thisfile_ape['comments']['track'][] = $comment;
    229. 

  229. 						}
    230. 

  230. 					}
    231. 

  231. 					break;
    232. 

  232. 

  233. 				case 'cover art (artist)':
    234. 

  234. 				case 'cover art (back)':
    235. 

  235. 				case 'cover art (band logo)':
    236. 

  236. 				case 'cover art (band)':
    237. 

  237. 				case 'cover art (colored fish)':
    238. 

  238. 				case 'cover art (composer)':
    239. 

  239. 				case 'cover art (conductor)':
    240. 

  240. 				case 'cover art (front)':
    241. 

  241. 				case 'cover art (icon)':
    242. 

  242. 				case 'cover art (illustration)':
    243. 

  243. 				case 'cover art (lead)':
    244. 

  244. 				case 'cover art (leaflet)':
    245. 

  245. 				case 'cover art (lyricist)':
    246. 

  246. 				case 'cover art (media)':
    247. 

  247. 				case 'cover art (movie scene)':
    248. 

  248. 				case 'cover art (other icon)':
    249. 

  249. 				case 'cover art (other)':
    250. 

  250. 				case 'cover art (performance)':
    251. 

  251. 				case 'cover art (publisher logo)':
    252. 

  252. 				case 'cover art (recording)':
    253. 

  253. 				case 'cover art (studio)':
    254. 

  254. 					// list of possible cover arts from http://taglib-sharp.sourcearchive.com/documentation/2.0.3.0-2/Ape_2Tag_8cs-source.html
    255. 

  255. 					if (is_array($thisfile_ape_items_current['data'])) {
    256. 

  256. 						$info['warning'][] = 'APEtag "'.$item_key.'" should be flagged as Binary data, but was incorrectly flagged as UTF-8';
    257. 

  257. 						$thisfile_ape_items_current['data'] = implode("\x00", $thisfile_ape_items_current['data']);
    258. 

  258. 					}
    259. 

  259. 					list($thisfile_ape_items_current['filename'], $thisfile_ape_items_current['data']) = explode("\x00", $thisfile_ape_items_current['data'], 2);
    260. 

  260. 					$thisfile_ape_items_current['data_offset'] = $thisfile_ape_items_current['offset'] + strlen($thisfile_ape_items_current['filename']."\x00");
    261. 

  261. 					$thisfile_ape_items_current['data_length'] = strlen($thisfile_ape_items_current['data']);
    262. 

  262. 

  263. 					do {
    264. 

  264. 						$thisfile_ape_items_current['image_mime'] = '';
    265. 

  265. 						$imageinfo = array();
    266. 

  266. 						$imagechunkcheck = getid3_lib::GetDataImageSize($thisfile_ape_items_current['data'], $imageinfo);
    267. 

  267. 						if (($imagechunkcheck === false) || !isset($imagechunkcheck[2])) {
    268. 

  268. 							$info['warning'][] = 'APEtag "'.$item_key.'" contains invalid image data';
    269. 

  269. 							break;
    270. 

  270. 						}
    271. 

  271. 						$thisfile_ape_items_current['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
    272. 

  272. 

  273. 						if ($this->inline_attachments === false) {
    274. 

  274. 							// skip entirely
    275. 

  275. 							unset($thisfile_ape_items_current['data']);
    276. 

  276. 							break;
    277. 

  277. 						}
    278. 

  278. 						if ($this->inline_attachments === true) {
    279. 

  279. 							// great
    280. 

  280. 						} elseif (is_int($this->inline_attachments)) {
    281. 

  281. 							if ($this->inline_attachments < $thisfile_ape_items_current['data_length']) {
    282. 

  282. 								// too big, skip
    283. 

  283. 								$info['warning'][] = 'attachment at '.$thisfile_ape_items_current['offset'].' is too large to process inline ('.number_format($thisfile_ape_items_current['data_length']).' bytes)';
    284. 

  284. 								unset($thisfile_ape_items_current['data']);
    285. 

  285. 								break;
    286. 

  286. 							}
    287. 

  287. 						} elseif (is_string($this->inline_attachments)) {
    288. 

  288. 							$this->inline_attachments = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->inline_attachments), DIRECTORY_SEPARATOR);
    289. 

  289. 							if (!is_dir($this->inline_attachments) || !is_writable($this->inline_attachments)) {
    290. 

  290. 								// cannot write, skip
    291. 

  291. 								$info['warning'][] = 'attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$this->inline_attachments.'" (not writable)';
    292. 

  292. 								unset($thisfile_ape_items_current['data']);
    293. 

  293. 								break;
    294. 

  294. 							}
    295. 

  295. 						}
    296. 

  296. 						// if we get this far, must be OK
    297. 

  297. 						if (is_string($this->inline_attachments)) {
    298. 

  298. 							$destination_filename = $this->inline_attachments.DIRECTORY_SEPARATOR.md5($info['filenamepath']).'_'.$thisfile_ape_items_current['data_offset'];
    299. 

  299. 							if (!file_exists($destination_filename) || is_writable($destination_filename)) {
    300. 

  300. 								file_put_contents($destination_filename, $thisfile_ape_items_current['data']);
    301. 

  301. 							} else {
    302. 

  302. 								$info['warning'][] = 'attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$destination_filename.'" (not writable)';
    303. 

  303. 							}
    304. 

  304. 							$thisfile_ape_items_current['data_filename'] = $destination_filename;
    305. 

  305. 							unset($thisfile_ape_items_current['data']);
    306. 

  306. 						} else {
    307. 

  307. 							if (!isset($info['ape']['comments']['picture'])) {
    308. 

  308. 								$info['ape']['comments']['picture'] = array();
    309. 

  309. 							}
    310. 

  310. 							$comments_picture_data = array();
    311. 

  311. 							foreach (array('data', 'image_mime', 'image_width', 'image_height', 'imagetype', 'picturetype', 'description', 'datalength') as $picture_key) {
    312. 

  312. 								if (isset($thisfile_ape_items_current[$picture_key])) {
    313. 

  313. 									$comments_picture_data[$picture_key] = $thisfile_ape_items_current[$picture_key];
    314. 

  314. 								}
    315. 

  315. 							}
    316. 

  316. 							$info['ape']['comments']['picture'][] = $comments_picture_data;
    317. 

  317. 							unset($comments_picture_data);
    318. 

  318. 						}
    319. 

  319. 					} while (false);
    320. 

  320. 					break;
    321. 

  321. 

  322. 				default:
    323. 

  323. 					if (is_array($thisfile_ape_items_current['data'])) {
    324. 

  324. 						foreach ($thisfile_ape_items_current['data'] as $comment) {
    325. 

  325. 							$thisfile_ape['comments'][strtolower($item_key)][] = $comment;
    326. 

  326. 						}
    327. 

  327. 					}
    328. 

  328. 					break;
    329. 

  329. 			}
    330. 

  330. 

  331. 		}
    332. 

  332. 		if (empty($thisfile_replaygain)) {
    333. 

  333. 			unset($info['replay_gain']);
    334. 

  334. 		}
    335. 

  335. 		return true;
    336. 

  336. 	}
    337. 

  337. 

  338. 	public function parseAPEheaderFooter($APEheaderFooterData) {
    339. 

  339. 		// http://www.uni-jena.de/~pfk/mpp/sv8/apeheader.html
    340. 

  340. 

  341. 		// shortcut
    342. 

  342. 		$headerfooterinfo['raw'] = array();
    343. 

  343. 		$headerfooterinfo_raw = &$headerfooterinfo['raw'];
    344. 

  344. 

  345. 		$headerfooterinfo_raw['footer_tag']   =                  substr($APEheaderFooterData,  0, 8);
    346. 

  346. 		if ($headerfooterinfo_raw['footer_tag'] != 'APETAGEX') {
    347. 

  347. 			return false;
    348. 

  348. 		}
    349. 

  349. 		$headerfooterinfo_raw['version']      = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData,  8, 4));
    350. 

  350. 		$headerfooterinfo_raw['tagsize']      = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 12, 4));
    351. 

  351. 		$headerfooterinfo_raw['tag_items']    = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 16, 4));
    352. 

  352. 		$headerfooterinfo_raw['global_flags'] = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 20, 4));
    353. 

  353. 		$headerfooterinfo_raw['reserved']     =                              substr($APEheaderFooterData, 24, 8);
    354. 

  354. 

  355. 		$headerfooterinfo['tag_version']         = $headerfooterinfo_raw['version'] / 1000;
    356. 

  356. 		if ($headerfooterinfo['tag_version'] >= 2) {
    357. 

  357. 			$headerfooterinfo['flags'] = $this->parseAPEtagFlags($headerfooterinfo_raw['global_flags']);
    358. 

  358. 		}
    359. 

  359. 		return $headerfooterinfo;
    360. 

  360. 	}
    361. 

  361. 

  362. 	public function parseAPEtagFlags($rawflagint) {
    363. 

  363. 		// "Note: APE Tags 1.0 do not use any of the APE Tag flags.
    364. 

  364. 		// All are set to zero on creation and ignored on reading."
    365. 

  365. 		// http://wiki.hydrogenaud.io/index.php?title=Ape_Tags_Flags
    366. 

  366. 		$flags['header']            = (bool) ($rawflagint & 0x80000000);
    367. 

  367. 		$flags['footer']            = (bool) ($rawflagint & 0x40000000);
    368. 

  368. 		$flags['this_is_header']    = (bool) ($rawflagint & 0x20000000);
    369. 

  369. 		$flags['item_contents_raw'] =        ($rawflagint & 0x00000006) >> 1;
    370. 

  370. 		$flags['read_only']         = (bool) ($rawflagint & 0x00000001);
    371. 

  371. 

  372. 		$flags['item_contents']     = $this->APEcontentTypeFlagLookup($flags['item_contents_raw']);
    373. 

  373. 

  374. 		return $flags;
    375. 

  375. 	}
    376. 

  376. 

  377. 	public function APEcontentTypeFlagLookup($contenttypeid) {
    378. 

  378. 		static $APEcontentTypeFlagLookup = array(
    379. 

  379. 			0 => 'utf-8',
    380. 

  380. 			1 => 'binary',
    381. 

  381. 			2 => 'external',
    382. 

  382. 			3 => 'reserved'
    383. 

  383. 		);
    384. 

  384. 		return (isset($APEcontentTypeFlagLookup[$contenttypeid]) ? $APEcontentTypeFlagLookup[$contenttypeid] : 'invalid');
    385. 

  385. 	}
    386. 

  386. 

  387. 	public function APEtagItemIsUTF8Lookup($itemkey) {
    388. 

  388. 		static $APEtagItemIsUTF8Lookup = array(
    389. 

  389. 			'title',
    390. 

  390. 			'subtitle',
    391. 

  391. 			'artist',
    392. 

  392. 			'album',
    393. 

  393. 			'debut album',
    394. 

  394. 			'publisher',
    395. 

  395. 			'conductor',
    396. 

  396. 			'track',
    397. 

  397. 			'composer',
    398. 

  398. 			'comment',
    399. 

  399. 			'copyright',
    400. 

  400. 			'publicationright',
    401. 

  401. 			'file',
    402. 

  402. 			'year',
    403. 

  403. 			'record date',
    404. 

  404. 			'record location',
    405. 

  405. 			'genre',
    406. 

  406. 			'media',
    407. 

  407. 			'related',
    408. 

  408. 			'isrc',
    409. 

  409. 			'abstract',
    410. 

  410. 			'language',
    411. 

  411. 			'bibliography'
    412. 

  412. 		);
    413. 

  413. 		return in_array(strtolower($itemkey), $APEtagItemIsUTF8Lookup);
    414. 

  414. 	}
    415. 

  415. 

  416. }
    417. 

  417.