static function ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo)
{
$OriginalOffset = ftell($fd);
$CommentStartOffset = $OriginalOffset;
$commentdataoffset = 0;
$VorbisCommentPage = 1;
switch ($ThisFileInfo['audio']['dataformat']) {
case 'vorbis':
$CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset'];
// Second Ogg page, after header block
fseek($fd, $CommentStartOffset, SEEK_SET);
$commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
$commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
$commentdataoffset += strlen('vorbis') + 1;
break;
case 'flac':
fseek($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET);
$commentdata = fread($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['block_length']);
break;
case 'speex':
$CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset'];
// Second Ogg page, after header block
fseek($fd, $CommentStartOffset, SEEK_SET);
$commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
$commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
break;
default:
return false;
break;
}
$VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
$commentdataoffset += 4;
$ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
$commentdataoffset += $VendorSize;
$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
$commentdataoffset += 4;
$ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset;
$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
$ThisFileInfo_ogg_comments_raw =& $ThisFileInfo['ogg']['comments_raw'];
for ($i = 0; $i < $CommentsCount; $i++) {
$ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;
if (ftell($fd) < $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4) {
$VorbisCommentPage++;
$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
// First, save what we haven't read yet
$AsYetUnusedData = substr($commentdata, $commentdataoffset);
// Then take that data off the end
$commentdata = substr($commentdata, 0, $commentdataoffset);
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
$commentdata .= str_repeat("", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
$commentdataoffset += 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments'];
// Finally, stick the unused data back on the end
$commentdata .= $AsYetUnusedData;
//$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
$commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
}
$ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
// replace avdataoffset with position just after the last vorbiscomment
$ThisFileInfo['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4;
$commentdataoffset += 4;
while (strlen($commentdata) - $commentdataoffset < $ThisFileInfo_ogg_comments_raw[$i]['size']) {
if ($ThisFileInfo_ogg_comments_raw[$i]['size'] > $ThisFileInfo['avdataend'] || $ThisFileInfo_ogg_comments_raw[$i]['size'] < 0) {
$ThisFileInfo['warning'][] = 'Invalid Ogg comment size (comment #' . $i . ', claims to be ' . number_format($ThisFileInfo_ogg_comments_raw[$i]['size']) . ' bytes) - aborting reading comments';
break 2;
}
$VorbisCommentPage++;
$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
// First, save what we haven't read yet
$AsYetUnusedData = substr($commentdata, $commentdataoffset);
// Then take that data off the end
$commentdata = substr($commentdata, 0, $commentdataoffset);
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
$commentdata .= str_repeat("", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
$commentdataoffset += 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments'];
// Finally, stick the unused data back on the end
$commentdata .= $AsYetUnusedData;
//$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
if (!isset($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage])) {
$ThisFileInfo['warning'][] = 'undefined Vorbis Comment page "' . $VorbisCommentPage . '" at offset ' . ftell($fd);
break;
}
$readlength = getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1);
if ($readlength <= 0) {
$ThisFileInfo['warning'][] = 'invalid length Vorbis Comment page "' . $VorbisCommentPage . '" at offset ' . ftell($fd);
break;
}
$commentdata .= fread($fd, $readlength);
//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];
}
$commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']);
$commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];
if (!$commentstring) {
// no comment?
$ThisFileInfo['warning'][] = 'Blank Ogg comment [' . $i . ']';
} elseif (strstr($commentstring, '=')) {
$commentexploded = explode('=', $commentstring, 2);
$ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]);
$ThisFileInfo_ogg_comments_raw[$i]['value'] = isset($commentexploded[1]) ? $commentexploded[1] : '';
$ThisFileInfo_ogg_comments_raw[$i]['data'] = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']);
if (preg_match('#^(BM|GIF|\\xFF\\xD8\\xFF|\\x89\\x50\\x4E\\x47\\x0D\\x0A\\x1A\\x0A|II\\x2A\\x00|MM\\x00\\x2A)#s', $ThisFileInfo_ogg_comments_raw[$i]['data'])) {
$imageinfo = array();
$imagechunkcheck = getid3_lib::GetDataImageSize($ThisFileInfo_ogg_comments_raw[$i]['data'], $imageinfo);
unset($imageinfo);
if (!empty($imagechunkcheck)) {
$ThisFileInfo_ogg_comments_raw[$i]['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
if ($ThisFileInfo_ogg_comments_raw[$i]['image_mime'] && $ThisFileInfo_ogg_comments_raw[$i]['image_mime'] != 'application/octet-stream') {
unset($ThisFileInfo_ogg_comments_raw[$i]['value']);
}
}
}
if (isset($ThisFileInfo_ogg_comments_raw[$i]['value'])) {
unset($ThisFileInfo_ogg_comments_raw[$i]['data']);
$ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value'];
} else {
$ThisFileInfo['ogg']['comments']['picture'][] = array('data' => $ThisFileInfo_ogg_comments_raw[$i]['data'], 'image_mime' => $ThisFileInfo_ogg_comments_raw[$i]['image_mime']);
}
} else {
$ThisFileInfo['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair [' . $i . ']: ' . $commentstring;
}
}
// Replay Gain Adjustment
// http://privatewww.essex.ac.uk/~djmrob/replaygain/
if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) {
foreach ($ThisFileInfo['ogg']['comments'] as $index => $commentvalue) {
switch ($index) {
case 'rg_audiophile':
case 'replaygain_album_gain':
$ThisFileInfo['replay_gain']['album']['adjustment'] = (double) $commentvalue[0];
unset($ThisFileInfo['ogg']['comments'][$index]);
break;
case 'rg_radio':
case 'replaygain_track_gain':
$ThisFileInfo['replay_gain']['track']['adjustment'] = (double) $commentvalue[0];
unset($ThisFileInfo['ogg']['comments'][$index]);
break;
case 'replaygain_album_peak':
$ThisFileInfo['replay_gain']['album']['peak'] = (double) $commentvalue[0];
unset($ThisFileInfo['ogg']['comments'][$index]);
break;
case 'rg_peak':
case 'replaygain_track_peak':
$ThisFileInfo['replay_gain']['track']['peak'] = (double) $commentvalue[0];
unset($ThisFileInfo['ogg']['comments'][$index]);
break;
default:
// do nothing
break;
}
}
}
fseek($fd, $OriginalOffset, SEEK_SET);
return true;
}
