372 lines
16 KiB
PHP
372 lines
16 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.tag.apetag.php //
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// module for analyzing APE tags //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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class getid3_apetag extends getid3_handler
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{
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var $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
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var $overrideendoffset = 0;
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function Analyze() {
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$info = &$this->getid3->info;
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if (!getid3_lib::intValueSupported($info['filesize'])) {
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$info['warning'][] = 'Unable to check for APEtags because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB';
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return false;
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}
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$id3v1tagsize = 128;
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$apetagheadersize = 32;
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$lyrics3tagsize = 10;
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if ($this->overrideendoffset == 0) {
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fseek($this->getid3->fp, 0 - $id3v1tagsize - $apetagheadersize - $lyrics3tagsize, SEEK_END);
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$APEfooterID3v1 = fread($this->getid3->fp, $id3v1tagsize + $apetagheadersize + $lyrics3tagsize);
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//if (preg_match('/APETAGEX.{24}TAG.{125}$/i', $APEfooterID3v1)) {
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if (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $id3v1tagsize - $apetagheadersize, 8) == 'APETAGEX') {
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// APE tag found before ID3v1
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$info['ape']['tag_offset_end'] = $info['filesize'] - $id3v1tagsize;
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//} elseif (preg_match('/APETAGEX.{24}$/i', $APEfooterID3v1)) {
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} elseif (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $apetagheadersize, 8) == 'APETAGEX') {
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// APE tag found, no ID3v1
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$info['ape']['tag_offset_end'] = $info['filesize'];
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}
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} else {
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fseek($this->getid3->fp, $this->overrideendoffset - $apetagheadersize, SEEK_SET);
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if (fread($this->getid3->fp, 8) == 'APETAGEX') {
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$info['ape']['tag_offset_end'] = $this->overrideendoffset;
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}
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}
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if (!isset($info['ape']['tag_offset_end'])) {
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// APE tag not found
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unset($info['ape']);
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return false;
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}
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// shortcut
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$thisfile_ape = &$info['ape'];
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fseek($this->getid3->fp, $thisfile_ape['tag_offset_end'] - $apetagheadersize, SEEK_SET);
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$APEfooterData = fread($this->getid3->fp, 32);
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if (!($thisfile_ape['footer'] = $this->parseAPEheaderFooter($APEfooterData))) {
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$info['error'][] = 'Error parsing APE footer at offset '.$thisfile_ape['tag_offset_end'];
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return false;
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}
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if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
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fseek($this->getid3->fp, $thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'] - $apetagheadersize, SEEK_SET);
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$thisfile_ape['tag_offset_start'] = ftell($this->getid3->fp);
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$APEtagData = fread($this->getid3->fp, $thisfile_ape['footer']['raw']['tagsize'] + $apetagheadersize);
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} else {
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$thisfile_ape['tag_offset_start'] = $thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'];
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fseek($this->getid3->fp, $thisfile_ape['tag_offset_start'], SEEK_SET);
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$APEtagData = fread($this->getid3->fp, $thisfile_ape['footer']['raw']['tagsize']);
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}
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$info['avdataend'] = $thisfile_ape['tag_offset_start'];
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if (isset($info['id3v1']['tag_offset_start']) && ($info['id3v1']['tag_offset_start'] < $thisfile_ape['tag_offset_end'])) {
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$info['warning'][] = 'ID3v1 tag information ignored since it appears to be a false synch in APEtag data';
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unset($info['id3v1']);
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foreach ($info['warning'] as $key => $value) {
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if ($value == 'Some ID3v1 fields do not use NULL characters for padding') {
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unset($info['warning'][$key]);
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sort($info['warning']);
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break;
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}
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}
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}
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$offset = 0;
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if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
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if ($thisfile_ape['header'] = $this->parseAPEheaderFooter(substr($APEtagData, 0, $apetagheadersize))) {
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$offset += $apetagheadersize;
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} else {
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$info['error'][] = 'Error parsing APE header at offset '.$thisfile_ape['tag_offset_start'];
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return false;
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}
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}
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// shortcut
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$info['replay_gain'] = array();
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$thisfile_replaygain = &$info['replay_gain'];
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for ($i = 0; $i < $thisfile_ape['footer']['raw']['tag_items']; $i++) {
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$value_size = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
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$offset += 4;
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$item_flags = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
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$offset += 4;
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if (strstr(substr($APEtagData, $offset), "\x00") === false) {
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$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'] + $offset);
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return false;
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}
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$ItemKeyLength = strpos($APEtagData, "\x00", $offset) - $offset;
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$item_key = strtolower(substr($APEtagData, $offset, $ItemKeyLength));
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// shortcut
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$thisfile_ape['items'][$item_key] = array();
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$thisfile_ape_items_current = &$thisfile_ape['items'][$item_key];
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$thisfile_ape_items_current['offset'] = $thisfile_ape['tag_offset_start'] + $offset;
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$offset += ($ItemKeyLength + 1); // skip 0x00 terminator
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$thisfile_ape_items_current['data'] = substr($APEtagData, $offset, $value_size);
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$offset += $value_size;
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$thisfile_ape_items_current['flags'] = $this->parseAPEtagFlags($item_flags);
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switch ($thisfile_ape_items_current['flags']['item_contents_raw']) {
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case 0: // UTF-8
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case 3: // Locator (URL, filename, etc), UTF-8 encoded
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$thisfile_ape_items_current['data'] = explode("\x00", trim($thisfile_ape_items_current['data']));
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break;
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default: // binary data
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break;
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}
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switch (strtolower($item_key)) {
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case 'replaygain_track_gain':
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$thisfile_replaygain['track']['adjustment'] = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
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$thisfile_replaygain['track']['originator'] = 'unspecified';
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break;
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case 'replaygain_track_peak':
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$thisfile_replaygain['track']['peak'] = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
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$thisfile_replaygain['track']['originator'] = 'unspecified';
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if ($thisfile_replaygain['track']['peak'] <= 0) {
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$info['warning'][] = 'ReplayGain Track peak from APEtag appears invalid: '.$thisfile_replaygain['track']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")';
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}
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break;
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case 'replaygain_album_gain':
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$thisfile_replaygain['album']['adjustment'] = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
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$thisfile_replaygain['album']['originator'] = 'unspecified';
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break;
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case 'replaygain_album_peak':
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$thisfile_replaygain['album']['peak'] = (float) str_replace(',', '.', $thisfile_ape_items_current['data'][0]); // float casting will see "0,95" as zero!
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$thisfile_replaygain['album']['originator'] = 'unspecified';
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if ($thisfile_replaygain['album']['peak'] <= 0) {
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$info['warning'][] = 'ReplayGain Album peak from APEtag appears invalid: '.$thisfile_replaygain['album']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")';
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}
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break;
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case 'mp3gain_undo':
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list($mp3gain_undo_left, $mp3gain_undo_right, $mp3gain_undo_wrap) = explode(',', $thisfile_ape_items_current['data'][0]);
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$thisfile_replaygain['mp3gain']['undo_left'] = intval($mp3gain_undo_left);
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$thisfile_replaygain['mp3gain']['undo_right'] = intval($mp3gain_undo_right);
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$thisfile_replaygain['mp3gain']['undo_wrap'] = (($mp3gain_undo_wrap == 'Y') ? true : false);
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break;
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case 'mp3gain_minmax':
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list($mp3gain_globalgain_min, $mp3gain_globalgain_max) = explode(',', $thisfile_ape_items_current['data'][0]);
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$thisfile_replaygain['mp3gain']['globalgain_track_min'] = intval($mp3gain_globalgain_min);
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$thisfile_replaygain['mp3gain']['globalgain_track_max'] = intval($mp3gain_globalgain_max);
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break;
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case 'mp3gain_album_minmax':
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list($mp3gain_globalgain_album_min, $mp3gain_globalgain_album_max) = explode(',', $thisfile_ape_items_current['data'][0]);
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$thisfile_replaygain['mp3gain']['globalgain_album_min'] = intval($mp3gain_globalgain_album_min);
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$thisfile_replaygain['mp3gain']['globalgain_album_max'] = intval($mp3gain_globalgain_album_max);
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break;
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case 'tracknumber':
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if (is_array($thisfile_ape_items_current['data'])) {
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foreach ($thisfile_ape_items_current['data'] as $comment) {
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$thisfile_ape['comments']['track'][] = $comment;
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}
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}
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break;
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case 'cover art (artist)':
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case 'cover art (back)':
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case 'cover art (band logo)':
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case 'cover art (band)':
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case 'cover art (colored fish)':
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case 'cover art (composer)':
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case 'cover art (conductor)':
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case 'cover art (front)':
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case 'cover art (icon)':
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case 'cover art (illustration)':
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case 'cover art (lead)':
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case 'cover art (leaflet)':
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case 'cover art (lyricist)':
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case 'cover art (media)':
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case 'cover art (movie scene)':
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case 'cover art (other icon)':
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case 'cover art (other)':
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case 'cover art (performance)':
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case 'cover art (publisher logo)':
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case 'cover art (recording)':
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case 'cover art (studio)':
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// list of possible cover arts from http://taglib-sharp.sourcearchive.com/documentation/2.0.3.0-2/Ape_2Tag_8cs-source.html
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list($thisfile_ape_items_current['filename'], $thisfile_ape_items_current['data']) = explode("\x00", $thisfile_ape_items_current['data'], 2);
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$thisfile_ape_items_current['data_offset'] = $thisfile_ape_items_current['offset'] + strlen($thisfile_ape_items_current['filename']."\x00");
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$thisfile_ape_items_current['data_length'] = strlen($thisfile_ape_items_current['data']);
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$thisfile_ape_items_current['image_mime'] = '';
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$imageinfo = array();
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$imagechunkcheck = getid3_lib::GetDataImageSize($thisfile_ape_items_current['data'], $imageinfo);
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$thisfile_ape_items_current['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
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do {
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if ($this->inline_attachments === false) {
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// skip entirely
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unset($thisfile_ape_items_current['data']);
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break;
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}
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if ($this->inline_attachments === true) {
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// great
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} elseif (is_int($this->inline_attachments)) {
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if ($this->inline_attachments < $thisfile_ape_items_current['data_length']) {
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// too big, skip
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$info['warning'][] = 'attachment at '.$thisfile_ape_items_current['offset'].' is too large to process inline ('.number_format($thisfile_ape_items_current['data_length']).' bytes)';
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unset($thisfile_ape_items_current['data']);
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break;
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}
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} elseif (is_string($this->inline_attachments)) {
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$this->inline_attachments = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->inline_attachments), DIRECTORY_SEPARATOR);
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if (!is_dir($this->inline_attachments) || !is_writable($this->inline_attachments)) {
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// cannot write, skip
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$info['warning'][] = 'attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$this->inline_attachments.'" (not writable)';
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unset($thisfile_ape_items_current['data']);
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break;
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}
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}
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// if we get this far, must be OK
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if (is_string($this->inline_attachments)) {
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$destination_filename = $this->inline_attachments.DIRECTORY_SEPARATOR.md5($info['filenamepath']).'_'.$thisfile_ape_items_current['data_offset'];
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if (!file_exists($destination_filename) || is_writable($destination_filename)) {
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file_put_contents($destination_filename, $thisfile_ape_items_current['data']);
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} else {
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$info['warning'][] = 'attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$destination_filename.'" (not writable)';
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}
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$thisfile_ape_items_current['data_filename'] = $destination_filename;
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unset($thisfile_ape_items_current['data']);
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} else {
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if (!isset($info['ape']['comments']['picture'])) {
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$info['ape']['comments']['picture'] = array();
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}
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$info['ape']['comments']['picture'][] = array('data'=>$thisfile_ape_items_current['data'], 'image_mime'=>$thisfile_ape_items_current['image_mime']);
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}
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} while (false);
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break;
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default:
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if (is_array($thisfile_ape_items_current['data'])) {
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foreach ($thisfile_ape_items_current['data'] as $comment) {
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$thisfile_ape['comments'][strtolower($item_key)][] = $comment;
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}
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}
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break;
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}
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}
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if (empty($thisfile_replaygain)) {
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unset($info['replay_gain']);
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}
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return true;
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}
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function parseAPEheaderFooter($APEheaderFooterData) {
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// http://www.uni-jena.de/~pfk/mpp/sv8/apeheader.html
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// shortcut
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$headerfooterinfo['raw'] = array();
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$headerfooterinfo_raw = &$headerfooterinfo['raw'];
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$headerfooterinfo_raw['footer_tag'] = substr($APEheaderFooterData, 0, 8);
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if ($headerfooterinfo_raw['footer_tag'] != 'APETAGEX') {
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return false;
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}
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$headerfooterinfo_raw['version'] = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 8, 4));
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$headerfooterinfo_raw['tagsize'] = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 12, 4));
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$headerfooterinfo_raw['tag_items'] = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 16, 4));
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$headerfooterinfo_raw['global_flags'] = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 20, 4));
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$headerfooterinfo_raw['reserved'] = substr($APEheaderFooterData, 24, 8);
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$headerfooterinfo['tag_version'] = $headerfooterinfo_raw['version'] / 1000;
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if ($headerfooterinfo['tag_version'] >= 2) {
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$headerfooterinfo['flags'] = $this->parseAPEtagFlags($headerfooterinfo_raw['global_flags']);
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}
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return $headerfooterinfo;
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}
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function parseAPEtagFlags($rawflagint) {
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// "Note: APE Tags 1.0 do not use any of the APE Tag flags.
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// All are set to zero on creation and ignored on reading."
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// http://www.uni-jena.de/~pfk/mpp/sv8/apetagflags.html
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$flags['header'] = (bool) ($rawflagint & 0x80000000);
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$flags['footer'] = (bool) ($rawflagint & 0x40000000);
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$flags['this_is_header'] = (bool) ($rawflagint & 0x20000000);
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$flags['item_contents_raw'] = ($rawflagint & 0x00000006) >> 1;
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$flags['read_only'] = (bool) ($rawflagint & 0x00000001);
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$flags['item_contents'] = $this->APEcontentTypeFlagLookup($flags['item_contents_raw']);
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return $flags;
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}
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function APEcontentTypeFlagLookup($contenttypeid) {
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static $APEcontentTypeFlagLookup = array(
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0 => 'utf-8',
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1 => 'binary',
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2 => 'external',
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3 => 'reserved'
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);
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return (isset($APEcontentTypeFlagLookup[$contenttypeid]) ? $APEcontentTypeFlagLookup[$contenttypeid] : 'invalid');
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}
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function APEtagItemIsUTF8Lookup($itemkey) {
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static $APEtagItemIsUTF8Lookup = array(
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'title',
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'subtitle',
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'artist',
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'album',
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'debut album',
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'publisher',
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'conductor',
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'track',
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'composer',
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'comment',
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'copyright',
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'publicationright',
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'file',
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'year',
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'record date',
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'record location',
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'genre',
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'media',
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'related',
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'isrc',
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'abstract',
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'language',
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'bibliography'
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);
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return in_array(strtolower($itemkey), $APEtagItemIsUTF8Lookup);
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}
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}
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?>
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