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, 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, OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
break;
default:
return false;
break;
}
$VendorSize = LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
$commentdataoffset += 4;
$ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
$commentdataoffset += $VendorSize;
$CommentsCount = LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
$commentdataoffset += 4;
$ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset;
$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
for ($i = 0; $i < $CommentsCount; $i++) {
$ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;
if (ftell($fd) < $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + 4) {
$VorbisCommentPage++;
$oggpageinfo = ParseOggPageHeader($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(chr(0), 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, OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
}
$ThisFileInfo['ogg']['comments_raw'][$i]['size'] = 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['error'] .= "\n" . 'Invalid Ogg comment size (comment #' . $i . ', claims to be ' . number_format($ThisFileInfo['ogg']['comments_raw'][$i]['size']) . ' bytes) - aborting reading comments';
break 2;
}
$VorbisCommentPage++;
$oggpageinfo = ParseOggPageHeader($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(chr(0), 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, OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
//$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'] .= "\n" . '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'] = $commentexploded[1] ? utf8_decode($commentexploded[1]) : '';
$ThisFileInfo['ogg']['comments_raw'][$i]['data'] = base64_decode($ThisFileInfo['ogg']['comments_raw'][$i]['value']);
$ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo['ogg']['comments_raw'][$i]['key'])][] = $ThisFileInfo['ogg']['comments_raw'][$i]['value'];
require_once GETID3_INCLUDEPATH . 'getid3.getimagesize.php';
$imagechunkcheck = GetDataImageSize($ThisFileInfo['ogg']['comments_raw'][$i]['data']);
$ThisFileInfo['ogg']['comments_raw'][$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]['image_mime']);
unset($ThisFileInfo['ogg']['comments_raw'][$i]['data']);
}
} else {
$ThisFileInfo['warning'] .= "\n" . '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair [' . $i . ']: ' . $commentstring;
}
}
// Check for presence of vorbiscomments
if (isset($ThisFileInfo['ogg']['comments'])) {
$ThisFileInfo['tags'][] = 'vorbiscomment';
// Yank other comments - vorbiscomments has highest preference
if (isset($ThisFileInfo['ogg']['comments'])) {
CopyFormatCommentsToRootComments($ThisFileInfo['ogg']['comments'], $ThisFileInfo, true, true, true);
}
}
// Replay Gain Adjustment
// http://privatewww.essex.ac.uk/~djmrob/replaygain/
if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) {
foreach ($ThisFileInfo['ogg']['comments'] as $index => $keyvaluepair) {
if (isset($keyvaluepair['key'])) {
switch ($keyvaluepair['key']) {
case 'RG_AUDIOPHILE':
case 'REPLAYGAIN_ALBUM_GAIN':
$ThisFileInfo['replay_gain']['audiophile']['adjustment'] = (double) $keyvaluepair['value'];
break;
case 'RG_RADIO':
case 'REPLAYGAIN_TRACK_GAIN':
$ThisFileInfo['replay_gain']['radio']['adjustment'] = (double) $keyvaluepair['value'];
break;
case 'REPLAYGAIN_ALBUM_PEAK':
$ThisFileInfo['replay_gain']['audiophile']['peak'] = (double) $keyvaluepair['value'];
break;
case 'RG_PEAK':
case 'REPLAYGAIN_TRACK_PEAK':
$ThisFileInfo['replay_gain']['radio']['peak'] = (double) $keyvaluepair['value'];
break;
default:
// do nothing
break;
}
}
}
}
fseek($fd, $OriginalOffset, SEEK_SET);
return true;
}
function getOggHeaderFilepointer(&$fd, &$MP3fileInfo)
{
if (!$fd) {
$MP3fileInfo['error'] = "\n" . 'Could not open file';
return FALSE;
} else {
// Page 1 - Stream Header
rewind($fd);
$MP3fileInfo['ogg']['pageheader'][0] = ParseOggPageHeader($fd);
if (ftell($fd) >= 10000) {
$MP3fileInfo['error'] = "\n" . 'Could not find start of Ogg page in the first 10,000 bytes (this might not be an Ogg-Vorbis file?)';
unset($MP3fileInfo['fileformat']);
unset($MP3fileInfo['ogg']);
return FALSE;
}
$filedata = fread($fd, 23);
$filedataoffset = 0;
$MP3fileInfo['ogg']['bitstreamversion'] = LittleEndian2Int(substr($filedata, 0, 4));
$MP3fileInfo['ogg']['numberofchannels'] = LittleEndian2Int(substr($filedata, 4, 1));
$MP3fileInfo['ogg']['samplerate'] = LittleEndian2Int(substr($filedata, 5, 4));
$MP3fileInfo['ogg']['samples'] = 0;
// filled in later
$MP3fileInfo['ogg']['bitrate_average'] = 0;
// filled in later
if (substr($filedata, 9, 4) !== chr(0xff) . chr(0xff) . chr(0xff) . chr(0xff)) {
$MP3fileInfo['ogg']['bitrate_max'] = LittleEndian2Int(substr($filedata, 9, 4));
}
if (substr($filedata, 13, 4) !== chr(0xff) . chr(0xff) . chr(0xff) . chr(0xff)) {
$MP3fileInfo['ogg']['bitrate_nominal'] = LittleEndian2Int(substr($filedata, 13, 4));
}
if (substr($filedata, 17, 4) !== chr(0xff) . chr(0xff) . chr(0xff) . chr(0xff)) {
$MP3fileInfo['ogg']['bitrate_min'] = LittleEndian2Int(substr($filedata, 17, 4));
}
$MP3fileInfo['ogg']['blocksize_small'] = pow(2, LittleEndian2Int(substr($filedata, 21, 1)) & 0xf);
$MP3fileInfo['ogg']['blocksize_large'] = pow(2, (LittleEndian2Int(substr($filedata, 21, 1)) & 0xf0) >> 4);
$MP3fileInfo['ogg']['stop_bit'] = ord(substr($filedata, 22, 1));
// must be 1, marks end of packet
// Page 2 - Comment Header
$MP3fileInfo['ogg']['pageheader'][1] = ParseOggPageHeader($fd);
$filedata = fread($fd, FREAD_BUFFER_SIZE);
$filedataoffset = 0;
$vendorsize = LittleEndian2Int(substr($filedata, $filedataoffset, 4));
$filedataoffset += 4;
$MP3fileInfo['ogg']['vendor'] = substr($filedata, $filedataoffset, $vendorsize);
$filedataoffset += $vendorsize;
$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
$totalcomments = LittleEndian2Int(substr($filedata, $filedataoffset, 4));
$filedataoffset += 4;
for ($i = 0; $i < $totalcomments; $i++) {
$commentsize = LittleEndian2Int(substr($filedata, $filedataoffset, 4));
$filedataoffset += 4;
$commentstring = substr($filedata, $filedataoffset, $commentsize);
$filedataoffset += $commentsize;
$commentexploded = explode('=', $commentstring, 2);
$MP3fileInfo['ogg']['comments']["{$i}"]['key'] = strtoupper($commentexploded[0]);
$MP3fileInfo['ogg']['comments']["{$i}"]['value'] = $commentexploded[1] ? $commentexploded[1] : '';
if (in_array($MP3fileInfo['ogg']['comments']["{$i}"]['key'], $basicfields)) {
$MP3fileInfo['ogg'][strtolower($MP3fileInfo['ogg']['comments']["{$i}"]['key'])] = $MP3fileInfo['ogg']['comments']["{$i}"]['value'];
}
}
$MP3fileInfo['ogg']['comments_offset_end'] = $filedataoffset;
// Last Page - Number of Samples
fseek($fd, max($MP3fileInfo['filesize'] - FREAD_BUFFER_SIZE, 0), SEEK_SET);
$LastChunkOfOgg = strrev(fread($fd, FREAD_BUFFER_SIZE));
if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) {
fseek($fd, 0 - ($LastOggSpostion + strlen('SggO')), SEEK_END);
$MP3fileInfo['ogg']['pageheader']['eos'] = ParseOggPageHeader($fd);
$MP3fileInfo['ogg']['samples'] = $MP3fileInfo['ogg']['pageheader']['eos']['pcm_abs_position'];
$MP3fileInfo['ogg']['bitrate_average'] = $MP3fileInfo['filesize'] * 8 / ($MP3fileInfo['ogg']['samples'] / $MP3fileInfo['ogg']['samplerate']);
}
if (isset($MP3fileInfo['ogg']['bitrate_average']) && $MP3fileInfo['ogg']['bitrate_average'] > 0) {
$MP3fileInfo['bitrate'] = $MP3fileInfo['ogg']['bitrate_average'];
} else {
if (isset($MP3fileInfo['ogg']['bitrate_nominal']) && $MP3fileInfo['ogg']['bitrate_nominal'] > 0) {
$MP3fileInfo['bitrate'] = $MP3fileInfo['ogg']['bitrate_nominal'];
} else {
if (isset($MP3fileInfo['ogg']['bitrate_min']) && isset($MP3fileInfo['ogg']['bitrate_max'])) {
$MP3fileInfo['bitrate'] = ($MP3fileInfo['ogg']['bitrate_min'] + $MP3fileInfo['ogg']['bitrate_max']) / 2;
}
}
}
if (isset($MP3fileInfo['bitrate']) && !isset($MP3fileInfo['playtime_seconds'])) {
$MP3fileInfo['playtime_seconds'] = (double) ($MP3fileInfo['filesize'] * 8 / $MP3fileInfo['bitrate']);
}
}
return TRUE;
}
