5 views 
Syntax Syntax
Return Return
(bool)
Source Source
File: wp-includes/ID3/module.tag.apetag.php
/**
* @return bool
*/
public function Analyze() {
$info = &$this->getid3->info;
if (!getid3_lib::intValueSupported($info['filesize'])) {
$this->warning('Unable to check for APEtags because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');
return false;
}
$id3v1tagsize = 128;
$apetagheadersize = 32;
$lyrics3tagsize = 10;
if ($this->overrideendoffset == 0) {
$this->fseek(0 - $id3v1tagsize - $apetagheadersize - $lyrics3tagsize, SEEK_END);
$APEfooterID3v1 = $this->fread($id3v1tagsize + $apetagheadersize + $lyrics3tagsize);
//if (preg_match('/APETAGEX.{24}TAG.{125}$/i', $APEfooterID3v1)) {
if (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $id3v1tagsize - $apetagheadersize, 8) == 'APETAGEX') {
// APE tag found before ID3v1
$info['ape']['tag_offset_end'] = $info['filesize'] - $id3v1tagsize;
//} elseif (preg_match('/APETAGEX.{24}$/i', $APEfooterID3v1)) {
} elseif (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $apetagheadersize, 8) == 'APETAGEX') {
// APE tag found, no ID3v1
$info['ape']['tag_offset_end'] = $info['filesize'];
}
} else {
$this->fseek($this->overrideendoffset - $apetagheadersize);
if ($this->fread(8) == 'APETAGEX') {
$info['ape']['tag_offset_end'] = $this->overrideendoffset;
}
}
if (!isset($info['ape']['tag_offset_end'])) {
// APE tag not found
unset($info['ape']);
return false;
}
// shortcut
$thisfile_ape = &$info['ape'];
$this->fseek($thisfile_ape['tag_offset_end'] - $apetagheadersize);
$APEfooterData = $this->fread(32);
if (!($thisfile_ape['footer'] = $this->parseAPEheaderFooter($APEfooterData))) {
$this->error('Error parsing APE footer at offset '.$thisfile_ape['tag_offset_end']);
return false;
}
if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
$this->fseek($thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'] - $apetagheadersize);
$thisfile_ape['tag_offset_start'] = $this->ftell();
$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize'] + $apetagheadersize);
} else {
$thisfile_ape['tag_offset_start'] = $thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'];
$this->fseek($thisfile_ape['tag_offset_start']);
$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize']);
}
$info['avdataend'] = $thisfile_ape['tag_offset_start'];
if (isset($info['id3v1']['tag_offset_start']) && ($info['id3v1']['tag_offset_start'] < $thisfile_ape['tag_offset_end'])) {
$this->warning('ID3v1 tag information ignored since it appears to be a false synch in APEtag data');
unset($info['id3v1']);
foreach ($info['warning'] as $key => $value) {
if ($value == 'Some ID3v1 fields do not use NULL characters for padding') {
unset($info['warning'][$key]);
sort($info['warning']);
break;
}
}
}
$offset = 0;
if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
if ($thisfile_ape['header'] = $this->parseAPEheaderFooter(substr($APEtagData, 0, $apetagheadersize))) {
$offset += $apetagheadersize;
} else {
$this->error('Error parsing APE header at offset '.$thisfile_ape['tag_offset_start']);
return false;
}
}
// shortcut
$info['replay_gain'] = array();
$thisfile_replaygain = &$info['replay_gain'];
for ($i = 0; $i < $thisfile_ape['footer']['raw']['tag_items']; $i++) {
$value_size = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
$offset += 4;
$item_flags = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
$offset += 4;
if (strstr(substr($APEtagData, $offset), "\x00") === false) {
$this->error('Cannot find null-byte (0x00) separator between ItemKey #'.$i.' and value. ItemKey starts '.$offset.' bytes into the APE tag, at file offset '.($thisfile_ape['tag_offset_start'] + $offset));
return false;
}
$ItemKeyLength = strpos($APEtagData, "\x00", $offset) - $offset;
$item_key = strtolower(substr($APEtagData, $offset, $ItemKeyLength));
// shortcut
$thisfile_ape['items'][$item_key] = array();
$thisfile_ape_items_current = &$thisfile_ape['items'][$item_key];
$thisfile_ape_items_current['offset'] = $thisfile_ape['tag_offset_start'] + $offset;
$offset += ($ItemKeyLength + 1); // skip 0x00 terminator
$thisfile_ape_items_current['data'] = substr($APEtagData, $offset, $value_size);
$offset += $value_size;
$thisfile_ape_items_current['flags'] = $this->parseAPEtagFlags($item_flags);
switch ($thisfile_ape_items_current['flags']['item_contents_raw']) {
case 0: // UTF-8
case 2: // Locator (URL, filename, etc), UTF-8 encoded
$thisfile_ape_items_current['data'] = explode("\x00", $thisfile_ape_items_current['data']);
break;
case 1: // binary data
default:
break;
}
switch (strtolower($item_key)) {
// http://wiki.hydrogenaud.io/index.php?title=ReplayGain#MP3Gain
case 'replaygain_track_gain':
if (preg_match('#^([\\-\\+][0-9\\.,]{8})( dB)?$#', $thisfile_ape_items_current['data'][0], $matches)) {
$thisfile_replaygain['track']['adjustment'] = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
$thisfile_replaygain['track']['originator'] = 'unspecified';
} else {
$this->warning('MP3gainTrackGain value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
}
break;
case 'replaygain_track_peak':
if (preg_match('#^([0-9\\.,]{8})$#', $thisfile_ape_items_current['data'][0], $matches)) {
$thisfile_replaygain['track']['peak'] = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
$thisfile_replaygain['track']['originator'] = 'unspecified';
if ($thisfile_replaygain['track']['peak'] <= 0) {
$this->warning('ReplayGain Track peak from APEtag appears invalid: '.$thisfile_replaygain['track']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")');
}
} else {
$this->warning('MP3gainTrackPeak value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
}
break;
case 'replaygain_album_gain':
if (preg_match('#^([\\-\\+][0-9\\.,]{8})( dB)?$#', $thisfile_ape_items_current['data'][0], $matches)) {
$thisfile_replaygain['album']['adjustment'] = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
$thisfile_replaygain['album']['originator'] = 'unspecified';
} else {
$this->warning('MP3gainAlbumGain value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
}
break;
case 'replaygain_album_peak':
if (preg_match('#^([0-9\\.,]{8})$#', $thisfile_ape_items_current['data'][0], $matches)) {
$thisfile_replaygain['album']['peak'] = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
$thisfile_replaygain['album']['originator'] = 'unspecified';
if ($thisfile_replaygain['album']['peak'] <= 0) {
$this->warning('ReplayGain Album peak from APEtag appears invalid: '.$thisfile_replaygain['album']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")');
}
} else {
$this->warning('MP3gainAlbumPeak value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
}
break;
case 'mp3gain_undo':
if (preg_match('#^[\\-\\+][0-9]{3},[\\-\\+][0-9]{3},[NW]$#', $thisfile_ape_items_current['data'][0])) {
list($mp3gain_undo_left, $mp3gain_undo_right, $mp3gain_undo_wrap) = explode(',', $thisfile_ape_items_current['data'][0]);
$thisfile_replaygain['mp3gain']['undo_left'] = intval($mp3gain_undo_left);
$thisfile_replaygain['mp3gain']['undo_right'] = intval($mp3gain_undo_right);
$thisfile_replaygain['mp3gain']['undo_wrap'] = (($mp3gain_undo_wrap == 'Y') ? true : false);
} else {
$this->warning('MP3gainUndo value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
}
break;
case 'mp3gain_minmax':
if (preg_match('#^[0-9]{3},[0-9]{3}$#', $thisfile_ape_items_current['data'][0])) {
list($mp3gain_globalgain_min, $mp3gain_globalgain_max) = explode(',', $thisfile_ape_items_current['data'][0]);
$thisfile_replaygain['mp3gain']['globalgain_track_min'] = intval($mp3gain_globalgain_min);
$thisfile_replaygain['mp3gain']['globalgain_track_max'] = intval($mp3gain_globalgain_max);
} else {
$this->warning('MP3gainMinMax value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
}
break;
case 'mp3gain_album_minmax':
if (preg_match('#^[0-9]{3},[0-9]{3}$#', $thisfile_ape_items_current['data'][0])) {
list($mp3gain_globalgain_album_min, $mp3gain_globalgain_album_max) = explode(',', $thisfile_ape_items_current['data'][0]);
$thisfile_replaygain['mp3gain']['globalgain_album_min'] = intval($mp3gain_globalgain_album_min);
$thisfile_replaygain['mp3gain']['globalgain_album_max'] = intval($mp3gain_globalgain_album_max);
} else {
$this->warning('MP3gainAlbumMinMax value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
}
break;
case 'tracknumber':
if (is_array($thisfile_ape_items_current['data'])) {
foreach ($thisfile_ape_items_current['data'] as $comment) {
$thisfile_ape['comments']['track_number'][] = $comment;
}
}
break;
case 'cover art (artist)':
case 'cover art (back)':
case 'cover art (band logo)':
case 'cover art (band)':
case 'cover art (colored fish)':
case 'cover art (composer)':
case 'cover art (conductor)':
case 'cover art (front)':
case 'cover art (icon)':
case 'cover art (illustration)':
case 'cover art (lead)':
case 'cover art (leaflet)':
case 'cover art (lyricist)':
case 'cover art (media)':
case 'cover art (movie scene)':
case 'cover art (other icon)':
case 'cover art (other)':
case 'cover art (performance)':
case 'cover art (publisher logo)':
case 'cover art (recording)':
case 'cover art (studio)':
// list of possible cover arts from http://taglib-sharp.sourcearchive.com/documentation/2.0.3.0-2/Ape_2Tag_8cs-source.html
if (is_array($thisfile_ape_items_current['data'])) {
$this->warning('APEtag "'.$item_key.'" should be flagged as Binary data, but was incorrectly flagged as UTF-8');
$thisfile_ape_items_current['data'] = implode("\x00", $thisfile_ape_items_current['data']);
}
list($thisfile_ape_items_current['filename'], $thisfile_ape_items_current['data']) = explode("\x00", $thisfile_ape_items_current['data'], 2);
$thisfile_ape_items_current['data_offset'] = $thisfile_ape_items_current['offset'] + strlen($thisfile_ape_items_current['filename']."\x00");
$thisfile_ape_items_current['data_length'] = strlen($thisfile_ape_items_current['data']);
do {
$thisfile_ape_items_current['image_mime'] = '';
$imageinfo = array();
$imagechunkcheck = getid3_lib::GetDataImageSize($thisfile_ape_items_current['data'], $imageinfo);
if (($imagechunkcheck === false) || !isset($imagechunkcheck[2])) {
$this->warning('APEtag "'.$item_key.'" contains invalid image data');
break;
}
$thisfile_ape_items_current['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
if ($this->inline_attachments === false) {
// skip entirely
unset($thisfile_ape_items_current['data']);
break;
}
if ($this->inline_attachments === true) {
// great
} elseif (is_int($this->inline_attachments)) {
if ($this->inline_attachments < $thisfile_ape_items_current['data_length']) {
// too big, skip
$this->warning('attachment at '.$thisfile_ape_items_current['offset'].' is too large to process inline ('.number_format($thisfile_ape_items_current['data_length']).' bytes)');
unset($thisfile_ape_items_current['data']);
break;
}
} elseif (is_string($this->inline_attachments)) {
$this->inline_attachments = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->inline_attachments), DIRECTORY_SEPARATOR);
if (!is_dir($this->inline_attachments) || !getID3::is_writable($this->inline_attachments)) {
// cannot write, skip
$this->warning('attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$this->inline_attachments.'" (not writable)');
unset($thisfile_ape_items_current['data']);
break;
}
}
// if we get this far, must be OK
if (is_string($this->inline_attachments)) {
$destination_filename = $this->inline_attachments.DIRECTORY_SEPARATOR.md5($info['filenamepath']).'_'.$thisfile_ape_items_current['data_offset'];
if (!file_exists($destination_filename) || getID3::is_writable($destination_filename)) {
file_put_contents($destination_filename, $thisfile_ape_items_current['data']);
} else {
$this->warning('attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$destination_filename.'" (not writable)');
}
$thisfile_ape_items_current['data_filename'] = $destination_filename;
unset($thisfile_ape_items_current['data']);
} else {
if (!isset($info['ape']['comments']['picture'])) {
$info['ape']['comments']['picture'] = array();
}
$comments_picture_data = array();
foreach (array('data', 'image_mime', 'image_width', 'image_height', 'imagetype', 'picturetype', 'description', 'datalength') as $picture_key) {
if (isset($thisfile_ape_items_current[$picture_key])) {
$comments_picture_data[$picture_key] = $thisfile_ape_items_current[$picture_key];
}
}
$info['ape']['comments']['picture'][] = $comments_picture_data;
unset($comments_picture_data);
}
} while (false);
break;
default:
if (is_array($thisfile_ape_items_current['data'])) {
foreach ($thisfile_ape_items_current['data'] as $comment) {
$thisfile_ape['comments'][strtolower($item_key)][] = $comment;
}
}
break;
}
}
if (empty($thisfile_replaygain)) {
