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File: wp-includes/ID3/module.audio-video.matroska.php
* @todo Rewrite EBML parser to reduce it's size and honor default element values
* @todo After rewrite implement stream size calculation, that will provide additional useful info and enable AAC/FLAC audio bitrate detection
*/
class getid3_matroska extends getid3_handler
{
/**
* If true, do not return information about CLUSTER chunks, since there's a lot of them
* and they're not usually useful [default: TRUE].
*
* @var bool
*/
public static $hide_clusters = true;
/**
* True to parse the whole file, not only header [default: FALSE].
*
* @var bool
*/
public static $parse_whole_file = false;
/*
* Private parser settings/placeholders.
*/
private $EBMLbuffer = '';
private $EBMLbuffer_offset = 0;
private $EBMLbuffer_length = 0;
private $current_offset = 0;
private $unuseful_elements = array(EBML_ID_CRC32, EBML_ID_VOID);
/**
* @return bool
*/
public function Analyze()
{
$info = &$this->getid3->info;
// parse container
try {
$this->parseEBML($info);
} catch (Exception $e) {
$this->error('EBML parser: '.$e->getMessage());
}
// calculate playtime
if (isset($info['matroska']['info']) && is_array($info['matroska']['info'])) {
foreach ($info['matroska']['info'] as $key => $infoarray) {
if (isset($infoarray['Duration'])) {
// TimecodeScale is how many nanoseconds each Duration unit is
$info['playtime_seconds'] = $infoarray['Duration'] * ((isset($infoarray['TimecodeScale']) ? $infoarray['TimecodeScale'] : 1000000) / 1000000000);
break;
}
}
}
// extract tags
if (isset($info['matroska']['tags']) && is_array($info['matroska']['tags'])) {
foreach ($info['matroska']['tags'] as $key => $infoarray) {
$this->ExtractCommentsSimpleTag($infoarray);
}
}
// process tracks
if (isset($info['matroska']['tracks']['tracks']) && is_array($info['matroska']['tracks']['tracks'])) {
foreach ($info['matroska']['tracks']['tracks'] as $key => $trackarray) {
$track_info = array();
$track_info['dataformat'] = self::CodecIDtoCommonName($trackarray['CodecID']);
$track_info['default'] = (isset($trackarray['FlagDefault']) ? $trackarray['FlagDefault'] : true);
if (isset($trackarray['Name'])) { $track_info['name'] = $trackarray['Name']; }
switch ($trackarray['TrackType']) {
case 1: // Video
$track_info['resolution_x'] = $trackarray['PixelWidth'];
$track_info['resolution_y'] = $trackarray['PixelHeight'];
$track_info['display_unit'] = self::displayUnit(isset($trackarray['DisplayUnit']) ? $trackarray['DisplayUnit'] : 0);
$track_info['display_x'] = (isset($trackarray['DisplayWidth']) ? $trackarray['DisplayWidth'] : $trackarray['PixelWidth']);
$track_info['display_y'] = (isset($trackarray['DisplayHeight']) ? $trackarray['DisplayHeight'] : $trackarray['PixelHeight']);
if (isset($trackarray['PixelCropBottom'])) { $track_info['crop_bottom'] = $trackarray['PixelCropBottom']; }
if (isset($trackarray['PixelCropTop'])) { $track_info['crop_top'] = $trackarray['PixelCropTop']; }
if (isset($trackarray['PixelCropLeft'])) { $track_info['crop_left'] = $trackarray['PixelCropLeft']; }
if (isset($trackarray['PixelCropRight'])) { $track_info['crop_right'] = $trackarray['PixelCropRight']; }
if (isset($trackarray['DefaultDuration'])) { $track_info['frame_rate'] = round(1000000000 / $trackarray['DefaultDuration'], 3); }
if (isset($trackarray['CodecName'])) { $track_info['codec'] = $trackarray['CodecName']; }
switch ($trackarray['CodecID']) {
case 'V_MS/VFW/FOURCC':
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
$parsed = getid3_riff::ParseBITMAPINFOHEADER($trackarray['CodecPrivate']);
$track_info['codec'] = getid3_riff::fourccLookup($parsed['fourcc']);
$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $parsed;
break;
/*case 'V_MPEG4/ISO/AVC':
$h264['profile'] = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 1, 1));
$h264['level'] = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 3, 1));
$rn = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 4, 1));
$h264['NALUlength'] = ($rn & 3) + 1;
$rn = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 5, 1));
$nsps = ($rn & 31);
$offset = 6;
for ($i = 0; $i < $nsps; $i ++) {
$length = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], $offset, 2));
$h264['SPS'][] = substr($trackarray['CodecPrivate'], $offset + 2, $length);
$offset += 2 + $length;
}
$npps = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], $offset, 1));
$offset += 1;
for ($i = 0; $i < $npps; $i ++) {
$length = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], $offset, 2));
$h264['PPS'][] = substr($trackarray['CodecPrivate'], $offset + 2, $length);
$offset += 2 + $length;
}
$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $h264;
break;*/
}
$info['video']['streams'][$trackarray['TrackUID']] = $track_info;
break;
case 2: // Audio
$track_info['sample_rate'] = (isset($trackarray['SamplingFrequency']) ? $trackarray['SamplingFrequency'] : 8000.0);
$track_info['channels'] = (isset($trackarray['Channels']) ? $trackarray['Channels'] : 1);
$track_info['language'] = (isset($trackarray['Language']) ? $trackarray['Language'] : 'eng');
if (isset($trackarray['BitDepth'])) { $track_info['bits_per_sample'] = $trackarray['BitDepth']; }
if (isset($trackarray['CodecName'])) { $track_info['codec'] = $trackarray['CodecName']; }
switch ($trackarray['CodecID']) {
case 'A_PCM/INT/LIT':
case 'A_PCM/INT/BIG':
$track_info['bitrate'] = $track_info['sample_rate'] * $track_info['channels'] * $trackarray['BitDepth'];
break;
case 'A_AC3':
case 'A_EAC3':
case 'A_DTS':
case 'A_MPEG/L3':
case 'A_MPEG/L2':
case 'A_FLAC':
$module_dataformat = ($track_info['dataformat'] == 'mp2' ? 'mp3' : ($track_info['dataformat'] == 'eac3' ? 'ac3' : $track_info['dataformat']));
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.'.$module_dataformat.'.php', __FILE__, true);
if (!isset($info['matroska']['track_data_offsets'][$trackarray['TrackNumber']])) {
$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because $info[matroska][track_data_offsets]['.$trackarray['TrackNumber'].'] not set');
break;
}
// create temp instance
$getid3_temp = new getID3();
if ($track_info['dataformat'] != 'flac') {
$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
}
$getid3_temp->info['avdataoffset'] = $info['matroska']['track_data_offsets'][$trackarray['TrackNumber']]['offset'];
if ($track_info['dataformat'][0] == 'm' || $track_info['dataformat'] == 'flac') {
$getid3_temp->info['avdataend'] = $info['matroska']['track_data_offsets'][$trackarray['TrackNumber']]['offset'] + $info['matroska']['track_data_offsets'][$trackarray['TrackNumber']]['length'];
}
// analyze
$class = 'getid3_'.$module_dataformat;
$header_data_key = $track_info['dataformat'][0] == 'm' ? 'mpeg' : $track_info['dataformat'];
$getid3_audio = new $class($getid3_temp, __CLASS__);
if ($track_info['dataformat'] == 'flac') {
$getid3_audio->AnalyzeString($trackarray['CodecPrivate']);
}
else {
$getid3_audio->Analyze();
}
if (!empty($getid3_temp->info[$header_data_key])) {
$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $getid3_temp->info[$header_data_key];
if (isset($getid3_temp->info['audio']) && is_array($getid3_temp->info['audio'])) {
foreach ($getid3_temp->info['audio'] as $sub_key => $value) {
$track_info[$sub_key] = $value;
}
}
}
else {
$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because '.$class.'::Analyze() failed at offset '.$getid3_temp->info['avdataoffset']);
}
// copy errors and warnings
if (!empty($getid3_temp->info['error'])) {
foreach ($getid3_temp->info['error'] as $newerror) {
$this->warning($class.'() says: ['.$newerror.']');
}
}
if (!empty($getid3_temp->info['warning'])) {
foreach ($getid3_temp->info['warning'] as $newerror) {
$this->warning($class.'() says: ['.$newerror.']');
}
}
unset($getid3_temp, $getid3_audio);
break;
case 'A_AAC':
case 'A_AAC/MPEG2/LC':
case 'A_AAC/MPEG2/LC/SBR':
case 'A_AAC/MPEG4/LC':
case 'A_AAC/MPEG4/LC/SBR':
$this->warning($trackarray['CodecID'].' audio data contains no header, audio/video bitrates can\'t be calculated');
break;
case 'A_VORBIS':
if (!isset($trackarray['CodecPrivate'])) {
$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because CodecPrivate data not set');
break;
}
$vorbis_offset = strpos($trackarray['CodecPrivate'], 'vorbis', 1);
if ($vorbis_offset === false) {
$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because CodecPrivate data does not contain "vorbis" keyword');
break;
}
$vorbis_offset -= 1;
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ogg.php', __FILE__, true);
// create temp instance
$getid3_temp = new getID3();
// analyze
$getid3_ogg = new getid3_ogg($getid3_temp);
$oggpageinfo['page_seqno'] = 0;
$getid3_ogg->ParseVorbisPageHeader($trackarray['CodecPrivate'], $vorbis_offset, $oggpageinfo);
if (!empty($getid3_temp->info['ogg'])) {
$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $getid3_temp->info['ogg'];
if (isset($getid3_temp->info['audio']) && is_array($getid3_temp->info['audio'])) {
foreach ($getid3_temp->info['audio'] as $sub_key => $value) {
$track_info[$sub_key] = $value;
}
}
}
// copy errors and warnings
if (!empty($getid3_temp->info['error'])) {
foreach ($getid3_temp->info['error'] as $newerror) {
$this->warning('getid3_ogg() says: ['.$newerror.']');
}
}
if (!empty($getid3_temp->info['warning'])) {
foreach ($getid3_temp->info['warning'] as $newerror) {
$this->warning('getid3_ogg() says: ['.$newerror.']');
}
}
if (!empty($getid3_temp->info['ogg']['bitrate_nominal'])) {
$track_info['bitrate'] = $getid3_temp->info['ogg']['bitrate_nominal'];
}
unset($getid3_temp, $getid3_ogg, $oggpageinfo, $vorbis_offset);
break;
case 'A_MS/ACM':
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
$parsed = getid3_riff::parseWAVEFORMATex($trackarray['CodecPrivate']);
foreach ($parsed as $sub_key => $value) {
if ($sub_key != 'raw') {
$track_info[$sub_key] = $value;
}
}
$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $parsed;
break;
default:
$this->warning('Unhandled audio type "'.(isset($trackarray['CodecID']) ? $trackarray['CodecID'] : '').'"');
break;
}
$info['audio']['streams'][$trackarray['TrackUID']] = $track_info;
break;
}
}
if (!empty($info['video']['streams'])) {
$info['video'] = self::getDefaultStreamInfo($info['video']['streams']);
}
if (!empty($info['audio']['streams'])) {
$info['audio'] = self::getDefaultStreamInfo($info['audio']['streams']);
}
}
// process attachments
if (isset($info['matroska']['attachments']) && $this->getid3->option_save_attachments !== getID3::ATTACHMENTS_NONE) {
foreach ($info['matroska']['attachments'] as $i => $entry) {
if (strpos($entry['FileMimeType'], 'image/') === 0 && !empty($entry['FileData'])) {
$info['matroska']['comments']['picture'][] = array('data' => $entry['FileData'], 'image_mime' => $entry['FileMimeType'], 'filename' => $entry['FileName']);
}
}
}
// determine mime type
if (!empty($info['video']['streams'])) {
$info['mime_type'] = ($info['matroska']['doctype'] == 'webm' ? 'video/webm' : 'video/x-matroska');
} elseif (!empty($info['audio']['streams'])) {
$info['mime_type'] = ($info['matroska']['doctype'] == 'webm' ? 'audio/webm' : 'audio/x-matroska');
} elseif (isset($info['mime_type'])) {
unset($info['mime_type']);
}
// use _STATISTICS_TAGS if available to set audio/video bitrates
if (!empty($info['matroska']['tags'])) {
$_STATISTICS_byTrackUID = array();
foreach ($info['matroska']['tags'] as $key1 => $value1) {
if (!empty($value1['Targets']['TagTrackUID'][0]) && !empty($value1['SimpleTag'])) {
foreach ($value1['SimpleTag'] as $key2 => $value2) {
if (!empty($value2['TagName']) && isset($value2['TagString'])) {
$_STATISTICS_byTrackUID[$value1['Targets']['TagTrackUID'][0]][$value2['TagName']] = $value2['TagString'];
}
}
}
}
foreach (array('audio','video') as $avtype) {
if (!empty($info[$avtype]['streams'])) {
foreach ($info[$avtype]['streams'] as $trackUID => $trackdata) {
if (!isset($trackdata['bitrate']) && !empty($_STATISTICS_byTrackUID[$trackUID]['BPS'])) {
$info[$avtype]['streams'][$trackUID]['bitrate'] = (int) $_STATISTICS_byTrackUID[$trackUID]['BPS'];
@$info[$avtype]['bitrate'] += $info[$avtype]['streams'][$trackUID]['bitrate'];
}
}
}
}
}
return true;
}
/**
* @param array $info
*/
private function parseEBML(&$info) {
// http://www.matroska.org/technical/specs/index.html#EBMLBasics
$this->current_offset = $info['avdataoffset'];
while ($this->getEBMLelement($top_element, $info['avdataend'])) {
switch ($top_element['id']) {
case EBML_ID_EBML:
$info['matroska']['header']['offset'] = $top_element['offset'];
$info['matroska']['header']['length'] = $top_element['length'];
while ($this->getEBMLelement($element_data, $top_element['end'], true)) {
switch ($element_data['id']) {
case EBML_ID_EBMLVERSION:
case EBML_ID_EBMLREADVERSION:
case EBML_ID_EBMLMAXIDLENGTH:
case EBML_ID_EBMLMAXSIZELENGTH:
case EBML_ID_DOCTYPEVERSION:
case EBML_ID_DOCTYPEREADVERSION:
$element_data['data'] = getid3_lib::BigEndian2Int($element_data['data']);
break;
case EBML_ID_DOCTYPE:
$element_data['data'] = getid3_lib::trimNullByte($element_data['data']);
$info['matroska']['doctype'] = $element_data['data'];
$info['fileformat'] = $element_data['data'];
break;
default:
$this->unhandledElement('header', __LINE__, $element_data);
break;
}
unset($element_data['offset'], $element_data['end']);
$info['matroska']['header']['elements'][] = $element_data;
}
break;
case EBML_ID_SEGMENT:
$info['matroska']['segment'][0]['offset'] = $top_element['offset'];
$info['matroska']['segment'][0]['length'] = $top_element['length'];
while ($this->getEBMLelement($element_data, $top_element['end'])) {
if ($element_data['id'] != EBML_ID_CLUSTER || !self::$hide_clusters) { // collect clusters only if required
$info['matroska']['segments'][] = $element_data;
}
switch ($element_data['id']) {
case EBML_ID_SEEKHEAD: // Contains the position of other level 1 elements.
while ($this->getEBMLelement($seek_entry, $element_data['end'])) {
switch ($seek_entry['id']) {
case EBML_ID_SEEK: // Contains a single seek entry to an EBML element
while ($this->getEBMLelement($sub_seek_entry, $seek_entry['end'], true)) {
switch ($sub_seek_entry['id']) {
case EBML_ID_SEEKID:
$seek_entry['target_id'] = self::EBML2Int($sub_seek_entry['data']);
$seek_entry['target_name'] = self::EBMLidName($seek_entry['target_id']);
break;
case EBML_ID_SEEKPOSITION:
$seek_entry['target_offset'] = $element_data['offset'] + getid3_lib::BigEndian2Int($sub_seek_entry['data']);
break;
default:
$this->unhandledElement('seekhead.seek', __LINE__, $sub_seek_entry); }
break;
}
if (!isset($seek_entry['target_id'])) {
$this->warning('seek_entry[target_id] unexpectedly not set at '.$seek_entry['offset']);
break;
}
if (($seek_entry['target_id'] != EBML_ID_CLUSTER) || !self::$hide_clusters) { // collect clusters only if required
$info['matroska']['seek'][] = $seek_entry;
}
break;
default:
$this->unhandledElement('seekhead', __LINE__, $seek_entry);
break;
}
}
break;
case EBML_ID_TRACKS: // A top-level block of information with many tracks described.
$info['matroska']['tracks'] = $element_data;
while ($this->getEBMLelement($track_entry, $element_data['end'])) {
switch ($track_entry['id']) {
case EBML_ID_TRACKENTRY: //subelements: Describes a track with all elements.
while ($this->getEBMLelement($subelement, $track_entry['end'], array(EBML_ID_VIDEO, EBML_ID_AUDIO, EBML_ID_CONTENTENCODINGS, EBML_ID_CODECPRIVATE))) {
switch ($subelement['id']) {
case EBML_ID_TRACKUID:
$track_entry[$subelement['id_name']] = getid3_lib::PrintHexBytes($subelement['data'], true, false);
break;
case EBML_ID_TRACKNUMBER:
case EBML_ID_TRACKTYPE:
case EBML_ID_MINCACHE:
case EBML_ID_MAXCACHE:
case EBML_ID_MAXBLOCKADDITIONID:
case EBML_ID_DEFAULTDURATION: // nanoseconds per frame
$track_entry[$subelement['id_name']] = getid3_lib::BigEndian2Int($subelement['data']);
break;
case EBML_ID_TRACKTIMECODESCALE:
$track_entry[$subelement['id_name']] = getid3_lib::BigEndian2Float($subelement['data']);
break;
case EBML_ID_CODECID:
case EBML_ID_LANGUAGE:
case EBML_ID_NAME:
case EBML_ID_CODECNAME:
$track_entry[$subelement['id_name']] = getid3_lib::trimNullByte($subelement['data']);
break;
case EBML_ID_CODECPRIVATE:
$track_entry[$subelement['id_name']] = $this->readEBMLelementData($subelement['length'], true);
break;
case EBML_ID_FLAGENABLED:
case EBML_ID_FLAGDEFAULT:
case EBML_ID_FLAGFORCED:
case EBML_ID_FLAGLACING:
case EBML_ID_CODECDECODEALL:
$track_entry[$subelement['id_name']] = (bool) getid3_lib::BigEndian2Int($subelement['data']);
break;
case EBML_ID_VIDEO:
while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
switch ($sub_subelement['id']) {
case EBML_ID_PIXELWIDTH:
case EBML_ID_PIXELHEIGHT:
case EBML_ID_PIXELCROPBOTTOM:
case EBML_ID_PIXELCROPTOP:
case EBML_ID_PIXELCROPLEFT:
case EBML_ID_PIXELCROPRIGHT:
case EBML_ID_DISPLAYWIDTH:
case EBML_ID_DISPLAYHEIGHT:
case EBML_ID_DISPLAYUNIT:
case EBML_ID_ASPECTRATIOTYPE:
case EBML_ID_STEREOMODE:
case EBML_ID_OLDSTEREOMODE:
$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_FLAGINTERLACED:
$track_entry[$sub_subelement['id_name']] = (bool)getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_GAMMAVALUE:
$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Float($sub_subelement['data']);
break;
case EBML_ID_COLOURSPACE:
$track_entry[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
break;
default:
$this->unhandledElement('track.video', __LINE__, $sub_subelement);
break;
}
}
break;
case EBML_ID_AUDIO:
while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
switch ($sub_subelement['id']) {
case EBML_ID_CHANNELS:
case EBML_ID_BITDEPTH:
$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_SAMPLINGFREQUENCY:
case EBML_ID_OUTPUTSAMPLINGFREQUENCY:
$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Float($sub_subelement['data']);
break;
case EBML_ID_CHANNELPOSITIONS:
$track_entry[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
break;
default:
$this->unhandledElement('track.audio', __LINE__, $sub_subelement);
break;
}
}
break;
case EBML_ID_CONTENTENCODINGS:
while ($this->getEBMLelement($sub_subelement, $subelement['end'])) {
switch ($sub_subelement['id']) {
case EBML_ID_CONTENTENCODING:
while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], array(EBML_ID_CONTENTCOMPRESSION, EBML_ID_CONTENTENCRYPTION))) {
switch ($sub_sub_subelement['id']) {
case EBML_ID_CONTENTENCODINGORDER:
case EBML_ID_CONTENTENCODINGSCOPE:
case EBML_ID_CONTENTENCODINGTYPE:
$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
break;
case EBML_ID_CONTENTCOMPRESSION:
while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
switch ($sub_sub_sub_subelement['id']) {
case EBML_ID_CONTENTCOMPALGO:
$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_sub_subelement['data']);
break;
case EBML_ID_CONTENTCOMPSETTINGS:
$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = $sub_sub_sub_subelement['data'];
break;
default:
$this->unhandledElement('track.contentencodings.contentencoding.contentcompression', __LINE__, $sub_sub_sub_subelement);
break;
}
}
break;
case EBML_ID_CONTENTENCRYPTION:
while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
switch ($sub_sub_sub_subelement['id']) {
case EBML_ID_CONTENTENCALGO:
case EBML_ID_CONTENTSIGALGO:
case EBML_ID_CONTENTSIGHASHALGO:
$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_sub_subelement['data']);
break;
case EBML_ID_CONTENTENCKEYID:
case EBML_ID_CONTENTSIGNATURE:
case EBML_ID_CONTENTSIGKEYID:
$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = $sub_sub_sub_subelement['data'];
break;
default:
$this->unhandledElement('track.contentencodings.contentencoding.contentcompression', __LINE__, $sub_sub_sub_subelement);
break;
}
}
break;
default:
$this->unhandledElement('track.contentencodings.contentencoding', __LINE__, $sub_sub_subelement);
break;
}
}
break;
default:
$this->unhandledElement('track.contentencodings', __LINE__, $sub_subelement);
break;
}
}
break;
default:
$this->unhandledElement('track', __LINE__, $subelement);
break;
}
}
$info['matroska']['tracks']['tracks'][] = $track_entry;
break;
default:
$this->unhandledElement('tracks', __LINE__, $track_entry);
break;
}
}
break;
case EBML_ID_INFO: // Contains miscellaneous general information and statistics on the file.
$info_entry = array();
while ($this->getEBMLelement($subelement, $element_data['end'], true)) {
switch ($subelement['id']) {
case EBML_ID_TIMECODESCALE:
$info_entry[$subelement['id_name']] = getid3_lib::BigEndian2Int($subelement['data']);
break;
case EBML_ID_DURATION:
$info_entry[$subelement['id_name']] = getid3_lib::BigEndian2Float($subelement['data']);
break;
case EBML_ID_DATEUTC:
$info_entry[$subelement['id_name']] = getid3_lib::BigEndian2Int($subelement['data']);
$info_entry[$subelement['id_name'].'_unix'] = self::EBMLdate2unix($info_entry[$subelement['id_name']]);
break;
case EBML_ID_SEGMENTUID:
case EBML_ID_PREVUID:
case EBML_ID_NEXTUID:
$info_entry[$subelement['id_name']] = getid3_lib::trimNullByte($subelement['data']);
break;
case EBML_ID_SEGMENTFAMILY:
$info_entry[$subelement['id_name']][] = getid3_lib::trimNullByte($subelement['data']);
break;
case EBML_ID_SEGMENTFILENAME:
case EBML_ID_PREVFILENAME:
case EBML_ID_NEXTFILENAME:
case EBML_ID_TITLE:
case EBML_ID_MUXINGAPP:
case EBML_ID_WRITINGAPP:
$info_entry[$subelement['id_name']] = getid3_lib::trimNullByte($subelement['data']);
$info['matroska']['comments'][strtolower($subelement['id_name'])][] = $info_entry[$subelement['id_name']];
break;
case EBML_ID_CHAPTERTRANSLATE:
$chaptertranslate_entry = array();
while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
switch ($sub_subelement['id']) {
case EBML_ID_CHAPTERTRANSLATEEDITIONUID:
$chaptertranslate_entry[$sub_subelement['id_name']][] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_CHAPTERTRANSLATECODEC:
$chaptertranslate_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_CHAPTERTRANSLATEID:
$chaptertranslate_entry[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
break;
default:
$this->unhandledElement('info.chaptertranslate', __LINE__, $sub_subelement);
break;
}
}
$info_entry[$subelement['id_name']] = $chaptertranslate_entry;
break;
default:
$this->unhandledElement('info', __LINE__, $subelement);
break;
}
}
$info['matroska']['info'][] = $info_entry;
break;
case EBML_ID_CUES: // A top-level element to speed seeking access. All entries are local to the segment. Should be mandatory for non "live" streams.
if (self::$hide_clusters) { // do not parse cues if hide clusters is "ON" till they point to clusters anyway
$this->current_offset = $element_data['end'];
break;
}
$cues_entry = array();
while ($this->getEBMLelement($subelement, $element_data['end'])) {
switch ($subelement['id']) {
case EBML_ID_CUEPOINT:
$cuepoint_entry = array();
while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_CUETRACKPOSITIONS))) {
switch ($sub_subelement['id']) {
case EBML_ID_CUETRACKPOSITIONS:
$cuetrackpositions_entry = array();
while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], true)) {
switch ($sub_sub_subelement['id']) {
case EBML_ID_CUETRACK:
case EBML_ID_CUECLUSTERPOSITION:
case EBML_ID_CUEBLOCKNUMBER:
case EBML_ID_CUECODECSTATE:
$cuetrackpositions_entry[$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
break;
default:
$this->unhandledElement('cues.cuepoint.cuetrackpositions', __LINE__, $sub_sub_subelement);
break;
}
}
$cuepoint_entry[$sub_subelement['id_name']][] = $cuetrackpositions_entry;
break;
case EBML_ID_CUETIME:
$cuepoint_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
default:
$this->unhandledElement('cues.cuepoint', __LINE__, $sub_subelement);
break;
}
}
$cues_entry[] = $cuepoint_entry;
break;
default:
$this->unhandledElement('cues', __LINE__, $subelement);
break;
}
}
$info['matroska']['cues'] = $cues_entry;
break;
case EBML_ID_TAGS: // Element containing elements specific to Tracks/Chapters.
$tags_entry = array();
while ($this->getEBMLelement($subelement, $element_data['end'], false)) {
switch ($subelement['id']) {
case EBML_ID_TAG:
$tag_entry = array();
while ($this->getEBMLelement($sub_subelement, $subelement['end'], false)) {
switch ($sub_subelement['id']) {
case EBML_ID_TARGETS:
$targets_entry = array();
while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], true)) {
switch ($sub_sub_subelement['id']) {
case EBML_ID_TARGETTYPEVALUE:
$targets_entry[$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
$targets_entry[strtolower($sub_sub_subelement['id_name']).'_long'] = self::TargetTypeValue($targets_entry[$sub_sub_subelement['id_name']]);
break;
case EBML_ID_TARGETTYPE:
$targets_entry[$sub_sub_subelement['id_name']] = $sub_sub_subelement['data'];
break;
case EBML_ID_TAGTRACKUID:
case EBML_ID_TAGEDITIONUID:
case EBML_ID_TAGCHAPTERUID:
case EBML_ID_TAGATTACHMENTUID:
$targets_entry[$sub_sub_subelement['id_name']][] = getid3_lib::PrintHexBytes($sub_sub_subelement['data'], true, false);
break;
default:
$this->unhandledElement('tags.tag.targets', __LINE__, $sub_sub_subelement);
break;
}
}
$tag_entry[$sub_subelement['id_name']] = $targets_entry;
break;
case EBML_ID_SIMPLETAG:
$tag_entry[$sub_subelement['id_name']][] = $this->HandleEMBLSimpleTag($sub_subelement['end']);
break;
default:
$this->unhandledElement('tags.tag', __LINE__, $sub_subelement);
break;
}
}
$tags_entry[] = $tag_entry;
break;
default:
$this->unhandledElement('tags', __LINE__, $subelement);
break;
}
}
$info['matroska']['tags'] = $tags_entry;
break;
case EBML_ID_ATTACHMENTS: // Contain attached files.
while ($this->getEBMLelement($subelement, $element_data['end'])) {
switch ($subelement['id']) {
case EBML_ID_ATTACHEDFILE:
$attachedfile_entry = array();
while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_FILEDATA))) {
switch ($sub_subelement['id']) {
case EBML_ID_FILEDESCRIPTION:
case EBML_ID_FILENAME:
case EBML_ID_FILEMIMETYPE:
$attachedfile_entry[$sub_subelement['id_name']] = $sub_subelement['data'];
break;
case EBML_ID_FILEDATA:
$attachedfile_entry['data_offset'] = $this->current_offset;
$attachedfile_entry['data_length'] = $sub_subelement['length'];
$attachedfile_entry[$sub_subelement['id_name']] = $this->saveAttachment(
$attachedfile_entry['FileName'],
$attachedfile_entry['data_offset'],
$attachedfile_entry['data_length']);
$this->current_offset = $sub_subelement['end'];
break;
case EBML_ID_FILEUID:
$attachedfile_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
default:
$this->unhandledElement('attachments.attachedfile', __LINE__, $sub_subelement);
break;
}
}
$info['matroska']['attachments'][] = $attachedfile_entry;
break;
default:
$this->unhandledElement('attachments', __LINE__, $subelement);
break;
}
}
break;
case EBML_ID_CHAPTERS:
while ($this->getEBMLelement($subelement, $element_data['end'])) {
switch ($subelement['id']) {
case EBML_ID_EDITIONENTRY:
$editionentry_entry = array();
while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_CHAPTERATOM))) {
switch ($sub_subelement['id']) {
case EBML_ID_EDITIONUID:
$editionentry_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_EDITIONFLAGHIDDEN:
case EBML_ID_EDITIONFLAGDEFAULT:
case EBML_ID_EDITIONFLAGORDERED:
$editionentry_entry[$sub_subelement['id_name']] = (bool)getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_CHAPTERATOM:
$chapteratom_entry = array();
while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], array(EBML_ID_CHAPTERTRACK, EBML_ID_CHAPTERDISPLAY))) {
switch ($sub_sub_subelement['id']) {
case EBML_ID_CHAPTERSEGMENTUID:
case EBML_ID_CHAPTERSEGMENTEDITIONUID:
$chapteratom_entry[$sub_sub_subelement['id_name']] = $sub_sub_subelement['data'];
break;
case EBML_ID_CHAPTERFLAGENABLED:
case EBML_ID_CHAPTERFLAGHIDDEN:
$chapteratom_entry[$sub_sub_subelement['id_name']] = (bool)getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
break;
case EBML_ID_CHAPTERUID:
case EBML_ID_CHAPTERTIMESTART:
case EBML_ID_CHAPTERTIMEEND:
$chapteratom_entry[$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
break;
case EBML_ID_CHAPTERTRACK:
$chaptertrack_entry = array();
while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
switch ($sub_sub_sub_subelement['id']) {
case EBML_ID_CHAPTERTRACKNUMBER:
$chaptertrack_entry[$sub_sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_sub_subelement['data']);
break;
default:
$this->unhandledElement('chapters.editionentry.chapteratom.chaptertrack', __LINE__, $sub_sub_sub_subelement);
break;
}
}
$chapteratom_entry[$sub_sub_subelement['id_name']][] = $chaptertrack_entry;
break;
case EBML_ID_CHAPTERDISPLAY:
$chapterdisplay_entry = array();
while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
switch ($sub_sub_sub_subelement['id']) {
case EBML_ID_CHAPSTRING:
case EBML_ID_CHAPLANGUAGE:
case EBML_ID_CHAPCOUNTRY:
$chapterdisplay_entry[$sub_sub_sub_subelement['id_name']] = $sub_sub_sub_subelement['data'];
break;
default:
$this->unhandledElement('chapters.editionentry.chapteratom.chapterdisplay', __LINE__, $sub_sub_sub_subelement);
break;
}
}
$chapteratom_entry[$sub_sub_subelement['id_name']][] = $chapterdisplay_entry;
break;
default:
$this->unhandledElement('chapters.editionentry.chapteratom', __LINE__, $sub_sub_subelement);
break;
}
}
$editionentry_entry[$sub_subelement['id_name']][] = $chapteratom_entry;
break;
default:
$this->unhandledElement('chapters.editionentry', __LINE__, $sub_subelement);
break;
}
}
$info['matroska']['chapters'][] = $editionentry_entry;
break;
default:
$this->unhandledElement('chapters', __LINE__, $subelement);
break;
}
}
break;
case EBML_ID_CLUSTER: // The lower level element containing the (monolithic) Block structure.
$cluster_entry = array();
while ($this->getEBMLelement($subelement, $element_data['end'], array(EBML_ID_CLUSTERSILENTTRACKS, EBML_ID_CLUSTERBLOCKGROUP, EBML_ID_CLUSTERSIMPLEBLOCK))) {
switch ($subelement['id']) {
case EBML_ID_CLUSTERTIMECODE:
case EBML_ID_CLUSTERPOSITION:
case EBML_ID_CLUSTERPREVSIZE:
$cluster_entry[$subelement['id_name']] = getid3_lib::BigEndian2Int($subelement['data']);
break;
case EBML_ID_CLUSTERSILENTTRACKS:
$cluster_silent_tracks = array();
while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
switch ($sub_subelement['id']) {
case EBML_ID_CLUSTERSILENTTRACKNUMBER:
$cluster_silent_tracks[] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
default:
$this->unhandledElement('cluster.silenttracks', __LINE__, $sub_subelement);
break;
}
}
$cluster_entry[$subelement['id_name']][] = $cluster_silent_tracks;
break;
case EBML_ID_CLUSTERBLOCKGROUP:
$cluster_block_group = array('offset' => $this->current_offset);
while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_CLUSTERBLOCK))) {
switch ($sub_subelement['id']) {
case EBML_ID_CLUSTERBLOCK:
$cluster_block_group[$sub_subelement['id_name']] = $this->HandleEMBLClusterBlock($sub_subelement, EBML_ID_CLUSTERBLOCK, $info);
break;
case EBML_ID_CLUSTERREFERENCEPRIORITY: // unsigned-int
case EBML_ID_CLUSTERBLOCKDURATION: // unsigned-int
$cluster_block_group[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
break;
case EBML_ID_CLUSTERREFERENCEBLOCK: // signed-int
$cluster_block_group[$sub_subelement['id_name']][] = getid3_lib::BigEndian2Int($sub_subelement['data'], false, true);
break;
case EBML_ID_CLUSTERCODECSTATE:
$cluster_block_group[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
break;
default:
$this->unhandledElement('clusters.blockgroup', __LINE__, $sub_subelement);
break;
}
}
$cluster_entry[$subelement['id_name']][] = $cluster_block_group;
break;
case EBML_ID_CLUSTERSIMPLEBLOCK:
$cluster_entry[$subelement['id_name']][] = $this->HandleEMBLClusterBlock($subelement, EBML_ID_CLUSTERSIMPLEBLOCK, $info);
break;
default:
$this->unhandledElement('cluster', __LINE__, $subelement);
break;
}
$this->current_offset = $subelement['end'];
}
if (!self::$hide_clusters) {
$info['matroska']['cluster'][] = $cluster_entry;
}
// check to see if all the data we need exists already, if so, break out of the loop
if (!self::$parse_whole_file) {
if (isset($info['matroska']['info']) && is_array($info['matroska']['info'])) {
if (isset($info['matroska']['tracks']['tracks']) && is_array($info['matroska']['tracks']['tracks'])) {
if (count($info['matroska']['track_data_offsets']) == count($info['matroska']['tracks']['tracks'])) {
return;
}
}
}
}
break;
default:
$this->unhandledElement('segment', __LINE__, $element_data);
break;
}
}
break;
default:
$this->unhandledElement('root', __LINE__, $top_element);
break;
}
}
}
/**
* @param int $min_data
*
* @return bool
*/
private function EnsureBufferHasEnoughData($min_data=1024) {
if (($this->current_offset - $this->EBMLbuffer_offset) >= ($this->EBMLbuffer_length - $min_data)) {
$read_bytes = max($min_data, $this->getid3->fread_buffer_size());
try {
$this->fseek($this->current_offset);
$this->EBMLbuffer_offset = $this->current_offset;
$this->EBMLbuffer = $this->fread($read_bytes);
$this->EBMLbuffer_length = strlen($this->EBMLbuffer);
} catch (getid3_exception $e) {
$this->warning('EBML parser: '.$e->getMessage());
return false;
}
if ($this->EBMLbuffer_length == 0 && $this->feof()) {
return $this->error('EBML parser: ran out of file at offset '.$this->current_offset);
}
}
return true;
}
/**
* @return int|float|false
*/
private function readEBMLint() {
$actual_offset = $this->current_offset - $this->EBMLbuffer_offset;
// get length of integer
$first_byte_int = ord($this->EBMLbuffer[$actual_offset]);
if (0x80 & $first_byte_int) {
$length = 1;
} elseif (0x40 & $first_byte_int) {
$length = 2;
} elseif (0x20 & $first_byte_int) {
$length = 3;
} elseif (0x10 & $first_byte_int) {
$length = 4;
} elseif (0x08 & $first_byte_int) {
$length = 5;
} elseif (0x04 & $first_byte_int) {
$length = 6;
} elseif (0x02 & $first_byte_int) {
$length = 7;
} elseif (0x01 & $first_byte_int) {
$length = 8;
} else {
throw new Exception('invalid EBML integer (leading 0x00) at '.$this->current_offset);
}
// read
$int_value = self::EBML2Int(substr($this->EBMLbuffer, $actual_offset, $length));
$this->current_offset += $length;
return $int_value;
}
/**
* @param int $length
* @param bool $check_buffer
*
* @return string|false
*/
private function readEBMLelementData($length, $check_buffer=false) {
if ($check_buffer && !$this->EnsureBufferHasEnoughData($length)) {
return false;
}
$data = substr($this->EBMLbuffer, $this->current_offset - $this->EBMLbuffer_offset, $length);
$this->current_offset += $length;
return $data;
}
/**
* @param array $element
* @param int $parent_end
* @param array|bool $get_data
*
* @return bool
*/
private function getEBMLelement(&$element, $parent_end, $get_data=false) {
if ($this->current_offset >= $parent_end) {
return false;
}
if (!$this->EnsureBufferHasEnoughData()) {
$this->current_offset = PHP_INT_MAX; // do not exit parser right now, allow to finish current loop to gather maximum information
return false;
}
$element = array();
// set offset
$element['offset'] = $this->current_offset;
// get ID
$element['id'] = $this->readEBMLint();
// get name
$element['id_name'] = self::EBMLidName($element['id']);
// get length
$element['length'] = $this->readEBMLint();
// get end offset
$element['end'] = $this->current_offset + $element['length'];
// get raw data
$dont_parse = (in_array($element['id'], $this->unuseful_elements) || $element['id_name'] == dechex($element['id']));
if (($get_data === true || (is_array($get_data) && !in_array($element['id'], $get_data))) && !$dont_parse) {
$element['data'] = $this->readEBMLelementData($element['length'], $element);
}
return true;
}
/**
* @param string $type
* @param int $line
* @param array $element
*/
private function unhandledElement($type, $line, $element) {
// warn only about unknown and missed elements, not about unuseful
if (!in_array($element['id'], $this->unuseful_elements)) {
$this->warning('Unhandled '.$type.' element ['.basename(__FILE__).':'.$line.'] ('.$element['id'].'::'.$element['id_name'].' ['.$element['length'].' bytes]) at '.$element['offset']);
}
// increase offset for unparsed elements
if (!isset($element['data'])) {
$this->current_offset = $element['end'];
}
}
/**
* @param array $SimpleTagArray
*
* @return bool
*/
private function ExtractCommentsSimpleTag($SimpleTagArray) {
if (!empty($SimpleTagArray['SimpleTag'])) {
foreach ($SimpleTagArray['SimpleTag'] as $SimpleTagKey => $SimpleTagData) {
if (!empty($SimpleTagData['TagName']) && !empty($SimpleTagData['TagString'])) {
$this->getid3->info['matroska']['comments'][strtolower($SimpleTagData['TagName'])][] = $SimpleTagData['TagString'];
}
if (!empty($SimpleTagData['SimpleTag'])) {
$this->ExtractCommentsSimpleTag($SimpleTagData);
}
}
}
return true;
}
/**
* @param int $parent_end
*
* @return array
*/
private function HandleEMBLSimpleTag($parent_end) {
$simpletag_entry = array();
while ($this->getEBMLelement($element, $parent_end, array(EBML_ID_SIMPLETAG))) {
switch ($element['id']) {
case EBML_ID_TAGNAME:
case EBML_ID_TAGLANGUAGE:
case EBML_ID_TAGSTRING:
case EBML_ID_TAGBINARY:
$simpletag_entry[$element['id_name']] = $element['data'];
break;
case EBML_ID_SIMPLETAG:
$simpletag_entry[$element['id_name']][] = $this->HandleEMBLSimpleTag($element['end']);
break;
case EBML_ID_TAGDEFAULT:
$simpletag_entry[$element['id_name']] = (bool)getid3_lib::BigEndian2Int($element['data']);
break;
default:
$this->unhandledElement('tag.simpletag', __LINE__, $element);
break;
}
}
return $simpletag_entry;
}
/**
* @param array $element
* @param int $block_type
* @param array $info
*
* @return array
*/
private function HandleEMBLClusterBlock($element, $block_type, &$info) {
// http://www.matroska.org/technical/specs/index.html#block_structure
// http://www.matroska.org/technical/specs/index.html#simpleblock_structure
$block_data = array();
$block_data['tracknumber'] = $this->readEBMLint();
$block_data['timecode'] = getid3_lib::BigEndian2Int($this->readEBMLelementData(2), false, true);
$block_data['flags_raw'] = getid3_lib::BigEndian2Int($this->readEBMLelementData(1));
if ($block_type == EBML_ID_CLUSTERSIMPLEBLOCK) {
$block_data['flags']['keyframe'] = (($block_data['flags_raw'] & 0x80) >> 7);
//$block_data['flags']['reserved1'] = (($block_data['flags_raw'] & 0x70) >> 4);
}
else {
//$block_data['flags']['reserved1'] = (($block_data['flags_raw'] & 0xF0) >> 4);
}
$block_data['flags']['invisible'] = (bool)(($block_data['flags_raw'] & 0x08) >> 3);
$block_data['flags']['lacing'] = (($block_data['flags_raw'] & 0x06) >> 1); // 00=no lacing; 01=Xiph lacing; 11=EBML lacing; 10=fixed-size lacing
if ($block_type == EBML_ID_CLUSTERSIMPLEBLOCK) {
$block_data['flags']['discardable'] = (($block_data['flags_raw'] & 0x01));
}
else {
//$block_data['flags']['reserved2'] = (($block_data['flags_raw'] & 0x01) >> 0);
}
$block_data['flags']['lacing_type'] = self::BlockLacingType($block_data['flags']['lacing']);
// Lace (when lacing bit is set)
if ($block_data['flags']['lacing'] > 0) {
$block_data['lace_frames'] = getid3_lib::BigEndian2Int($this->readEBMLelementData(1)) + 1; // Number of frames in the lace-1 (uint8)
if ($block_data['flags']['lacing'] != 0x02) {
for ($i = 1; $i < $block_data['lace_frames']; $i ++) { // Lace-coded size of each frame of the lace, except for the last one (multiple uint8). *This is not used with Fixed-size lacing as it is calculated automatically from (total size of lace) / (number of frames in lace).
if ($block_data['flags']['lacing'] == 0x03) { // EBML lacing
$block_data['lace_frames_size'][$i] = $this->readEBMLint(); // TODO: read size correctly, calc size for the last frame. For now offsets are deteminded OK with readEBMLint() and that's the most important thing.
}
else { // Xiph lacing
$block_data['lace_frames_size'][$i] = 0;
do {
$size = getid3_lib::BigEndian2Int($this->readEBMLelementData(1));
$block_data['lace_frames_size'][$i] += $size;
}
while ($size == 255);
}
}
if ($block_data['flags']['lacing'] == 0x01) { // calc size of the last frame only for Xiph lacing, till EBML sizes are now anyway determined incorrectly
$block_data['lace_frames_size'][] = $element['end'] - $this->current_offset - array_sum($block_data['lace_frames_size']);
}
}
}
if (!isset($info['matroska']['track_data_offsets'][$block_data['tracknumber']])) {
$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['offset'] = $this->current_offset;
$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['length'] = $element['end'] - $this->current_offset;
//$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['total_length'] = 0;
}
//$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['total_length'] += $info['matroska']['track_data_offsets'][$block_data['tracknumber']]['length'];
//$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['duration'] = $block_data['timecode'] * ((isset($info['matroska']['info'][0]['TimecodeScale']) ? $info['matroska']['info'][0]['TimecodeScale'] : 1000000) / 1000000000);
// set offset manually
$this->current_offset = $element['end'];
return $block_data;
}
/**
* @param string $EBMLstring
*
* @return int|float|false
*/
private static function EBML2Int($EBMLstring) {
// http://matroska.org/specs/
// Element ID coded with an UTF-8 like system:
// 1xxx xxxx - Class A IDs (2^7 -2 possible values) (base 0x8X)
// 01xx xxxx xxxx xxxx - Class B IDs (2^14-2 possible values) (base 0x4X 0xXX)
// 001x xxxx xxxx xxxx xxxx xxxx - Class C IDs (2^21-2 possible values) (base 0x2X 0xXX 0xXX)
// 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - Class D IDs (2^28-2 possible values) (base 0x1X 0xXX 0xXX 0xXX)
// Values with all x at 0 and 1 are reserved (hence the -2).
// Data size, in octets, is also coded with an UTF-8 like system :
// 1xxx xxxx - value 0 to 2^7-2
// 01xx xxxx xxxx xxxx - value 0 to 2^14-2
// 001x xxxx xxxx xxxx xxxx xxxx - value 0 to 2^21-2
// 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^28-2
// 0000 1xxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^35-2
// 0000 01xx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^42-2
// 0000 001x xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^49-2
// 0000 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^56-2
$first_byte_int = ord($EBMLstring[0]);
if (0x80 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x7F);
} elseif (0x40 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x3F);
} elseif (0x20 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x1F);
} elseif (0x10 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x0F);
} elseif (0x08 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x07);
} elseif (0x04 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x03);
} elseif (0x02 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x01);
} elseif (0x01 & $first_byte_int) {
$EBMLstring[0] = chr($first_byte_int & 0x00);
}
return getid3_lib::BigEndian2Int($EBMLstring);
}
/**
* @param int $EBMLdatestamp
*
* @return float
*/
private static function EBMLdate2unix($EBMLdatestamp) {
// Date - signed 8 octets integer in nanoseconds with 0 indicating the precise beginning of the millennium (at 2001-01-01T00:00:00,000000000 UTC)
// 978307200 == mktime(0, 0, 0, 1, 1, 2001) == January 1, 2001 12:00:00am UTC
return round(($EBMLdatestamp / 1000000000) + 978307200);
}
/**
* @param int $target_type
*
* @return string|int
*/
public static function TargetTypeValue($target_type) {
// http://www.matroska.org/technical/specs/tagging/index.html
static $TargetTypeValue = array();
if (empty($TargetTypeValue)) {
$TargetTypeValue[10] = 'A: ~ V:shot'; // the lowest hierarchy found in music or movies
$TargetTypeValue[20] = 'A:subtrack/part/movement ~ V:scene'; // corresponds to parts of a track for audio (like a movement)
$TargetTypeValue[30] = 'A:track/song ~ V:chapter'; // the common parts of an album or a movie
$TargetTypeValue[40] = 'A:part/session ~ V:part/session'; // when an album or episode has different logical parts
$TargetTypeValue[50] = 'A:album/opera/concert ~ V:movie/episode/concert'; // the most common grouping level of music and video (equals to an episode for TV series)
$TargetTypeValue[60] = 'A:edition/issue/volume/opus ~ V:season/sequel/volume'; // a list of lower levels grouped together
$TargetTypeValue[70] = 'A:collection ~ V:collection'; // the high hierarchy consisting of many different lower items
}
return (isset($TargetTypeValue[$target_type]) ? $TargetTypeValue[$target_type] : $target_type);
}
/**
* @param int $lacingtype
*
* @return string|int
*/
public static function BlockLacingType($lacingtype) {
// http://matroska.org/technical/specs/index.html#block_structure
static $BlockLacingType = array();
if (empty($BlockLacingType)) {
$BlockLacingType[0x00] = 'no lacing';
$BlockLacingType[0x01] = 'Xiph lacing';
$BlockLacingType[0x02] = 'fixed-size lacing';
$BlockLacingType[0x03] = 'EBML lacing';
}
return (isset($BlockLacingType[$lacingtype]) ? $BlockLacingType[$lacingtype] : $lacingtype);
}
/**
* @param string $codecid
*
* @return string
*/
public static function CodecIDtoCommonName($codecid) {
// http://www.matroska.org/technical/specs/codecid/index.html
static $CodecIDlist = array();
if (empty($CodecIDlist)) {
$CodecIDlist['A_AAC'] = 'aac';
$CodecIDlist['A_AAC/MPEG2/LC'] = 'aac';
$CodecIDlist['A_AC3'] = 'ac3';
$CodecIDlist['A_EAC3'] = 'eac3';
$CodecIDlist['A_DTS'] = 'dts';
$CodecIDlist['A_FLAC'] = 'flac';
$CodecIDlist['A_MPEG/L1'] = 'mp1';
$CodecIDlist['A_MPEG/L2'] = 'mp2';
$CodecIDlist['A_MPEG/L3'] = 'mp3';
$CodecIDlist['A_PCM/INT/LIT'] = 'pcm'; // PCM Integer Little Endian
$CodecIDlist['A_PCM/INT/BIG'] = 'pcm'; // PCM Integer Big Endian
$CodecIDlist['A_QUICKTIME/QDMC'] = 'quicktime'; // Quicktime: QDesign Music
$CodecIDlist['A_QUICKTIME/QDM2'] = 'quicktime'; // Quicktime: QDesign Music v2
$CodecIDlist['A_VORBIS'] = 'vorbis';
$CodecIDlist['V_MPEG1'] = 'mpeg';
$CodecIDlist['V_THEORA'] = 'theora';
$CodecIDlist['V_REAL/RV40'] = 'real';
$CodecIDlist['V_REAL/RV10'] = 'real';
$CodecIDlist['V_REAL/RV20'] = 'real';
$CodecIDlist['V_REAL/RV30'] = 'real';
$CodecIDlist['V_QUICKTIME'] = 'quicktime'; // Quicktime
$CodecIDlist['V_MPEG4/ISO/AP'] = 'mpeg4';
$CodecIDlist['V_MPEG4/ISO/ASP'] = 'mpeg4';
$CodecIDlist['V_MPEG4/ISO/AVC'] = 'h264';
$CodecIDlist['V_MPEG4/ISO/SP'] = 'mpeg4';
$CodecIDlist['V_VP8'] = 'vp8';
$CodecIDlist['V_MS/VFW/FOURCC'] = 'vcm'; // Microsoft (TM) Video Codec Manager (VCM)
$CodecIDlist['A_MS/ACM'] = 'acm'; // Microsoft (TM) Audio Codec Manager (ACM)
}
return (isset($CodecIDlist[$codecid]) ? $CodecIDlist[$codecid] : $codecid);
}
/**
* @param int $value
*
* @return string
*/
private static function EBMLidName($value) {
static $EBMLidList = array();
if (empty($EBMLidList)) {
$EBMLidList[EBML_ID_ASPECTRATIOTYPE] = 'AspectRatioType';
$EBMLidList[EBML_ID_ATTACHEDFILE] = 'AttachedFile';
$EBMLidList[EBML_ID_ATTACHMENTLINK] = 'AttachmentLink';
$EBMLidList[EBML_ID_ATTACHMENTS] = 'Attachments';
$EBMLidList[EBML_ID_AUDIO] = 'Audio';
$EBMLidList[EBML_ID_BITDEPTH] = 'BitDepth';
$EBMLidList[EBML_ID_CHANNELPOSITIONS] = 'ChannelPositions';
$EBMLidList[EBML_ID_CHANNELS] = 'Channels';
$EBMLidList[EBML_ID_CHAPCOUNTRY] = 'ChapCountry';
$EBMLidList[EBML_ID_CHAPLANGUAGE] = 'ChapLanguage';
$EBMLidList[EBML_ID_CHAPPROCESS] = 'ChapProcess';
$EBMLidList[EBML_ID_CHAPPROCESSCODECID] = 'ChapProcessCodecID';
$EBMLidList[EBML_ID_CHAPPROCESSCOMMAND] = 'ChapProcessCommand';
$EBMLidList[EBML_ID_CHAPPROCESSDATA] = 'ChapProcessData';
$EBMLidList[EBML_ID_CHAPPROCESSPRIVATE] = 'ChapProcessPrivate';
$EBMLidList[EBML_ID_CHAPPROCESSTIME] = 'ChapProcessTime';
$EBMLidList[EBML_ID_CHAPSTRING] = 'ChapString';
$EBMLidList[EBML_ID_CHAPTERATOM] = 'ChapterAtom';
$EBMLidList[EBML_ID_CHAPTERDISPLAY] = 'ChapterDisplay';
$EBMLidList[EBML_ID_CHAPTERFLAGENABLED] = 'ChapterFlagEnabled';
$EBMLidList[EBML_ID_CHAPTERFLAGHIDDEN] = 'ChapterFlagHidden';
$EBMLidList[EBML_ID_CHAPTERPHYSICALEQUIV] = 'ChapterPhysicalEquiv';
$EBMLidList[EBML_ID_CHAPTERS] = 'Chapters';
$EBMLidList[EBML_ID_CHAPTERSEGMENTEDITIONUID] = 'ChapterSegmentEditionUID';
$EBMLidList[EBML_ID_CHAPTERSEGMENTUID] = 'ChapterSegmentUID';
$EBMLidList[EBML_ID_CHAPTERTIMEEND] = 'ChapterTimeEnd';
$EBMLidList[EBML_ID_CHAPTERTIMESTART] = 'ChapterTimeStart';
$EBMLidList[EBML_ID_CHAPTERTRACK] = 'ChapterTrack';
$EBMLidList[EBML_ID_CHAPTERTRACKNUMBER] = 'ChapterTrackNumber';
$EBMLidList[EBML_ID_CHAPTERTRANSLATE] = 'ChapterTranslate';
$EBMLidList[EBML_ID_CHAPTERTRANSLATECODEC] = 'ChapterTranslateCodec';
$EBMLidList[EBML_ID_CHAPTERTRANSLATEEDITIONUID] = 'ChapterTranslateEditionUID';
$EBMLidList[EBML_ID_CHAPTERTRANSLATEID] = 'ChapterTranslateID';
$EBMLidList[EBML_ID_CHAPTERUID] = 'ChapterUID';
$EBMLidList[EBML_ID_CLUSTER] = 'Cluster';
$EBMLidList[EBML_ID_CLUSTERBLOCK] = 'ClusterBlock';
$EBMLidList[EBML_ID_CLUSTERBLOCKADDID] = 'ClusterBlockAddID';
$EBMLidList[EBML_ID_CLUSTERBLOCKADDITIONAL] = 'ClusterBlockAdditional';
$EBMLidList[EBML_ID_CLUSTERBLOCKADDITIONID] = 'ClusterBlockAdditionID';
$EBMLidList[EBML_ID_CLUSTERBLOCKADDITIONS] = 'ClusterBlockAdditions';
$EBMLidList[EBML_ID_CLUSTERBLOCKDURATION] = 'ClusterBlockDuration';
$EBMLidList[EBML_ID_CLUSTERBLOCKGROUP] = 'ClusterBlockGroup';
$EBMLidList[EBML_ID_CLUSTERBLOCKMORE] = 'ClusterBlockMore';
$EBMLidList[EBML_ID_CLUSTERBLOCKVIRTUAL] = 'ClusterBlockVirtual';
$EBMLidList[EBML_ID_CLUSTERCODECSTATE] = 'ClusterCodecState';
$EBMLidList[EBML_ID_CLUSTERDELAY] = 'ClusterDelay';
$EBMLidList[EBML_ID_CLUSTERDURATION] = 'ClusterDuration';
$EBMLidList[EBML_ID_CLUSTERENCRYPTEDBLOCK] = 'ClusterEncryptedBlock';
$EBMLidList[EBML_ID_CLUSTERFRAMENUMBER] = 'ClusterFrameNumber';
$EBMLidList[EBML_ID_CLUSTERLACENUMBER] = 'ClusterLaceNumber';
$EBMLidList[EBML_ID_CLUSTERPOSITION] = 'ClusterPosition';
$EBMLidList[EBML_ID_CLUSTERPREVSIZE] = 'ClusterPrevSize';
$EBMLidList[EBML_ID_CLUSTERREFERENCEBLOCK] = 'ClusterReferenceBlock';
$EBMLidList[EBML_ID_CLUSTERREFERENCEPRIORITY] = 'ClusterReferencePriority';
$EBMLidList[EBML_ID_CLUSTERREFERENCEVIRTUAL] = 'ClusterReferenceVirtual';
$EBMLidList[EBML_ID_CLUSTERSILENTTRACKNUMBER] = 'ClusterSilentTrackNumber';
$EBMLidList[EBML_ID_CLUSTERSILENTTRACKS] = 'ClusterSilentTracks';
$EBMLidList[EBML_ID_CLUSTERSIMPLEBLOCK] = 'ClusterSimpleBlock';
$EBMLidList[EBML_ID_CLUSTERTIMECODE] = 'ClusterTimecode';
$EBMLidList[EBML_ID_CLUSTERTIMESLICE] = 'ClusterTimeSlice';
$EBMLidList[EBML_ID_CODECDECODEALL] = 'CodecDecodeAll';
$EBMLidList[EBML_ID_CODECDOWNLOADURL] = 'CodecDownloadURL';
$EBMLidList[EBML_ID_CODECID] = 'CodecID';
$EBMLidList[EBML_ID_CODECINFOURL] = 'CodecInfoURL';
$EBMLidList[EBML_ID_CODECNAME] = 'CodecName';
$EBMLidList[EBML_ID_CODECPRIVATE] = 'CodecPrivate';
$EBMLidList[EBML_ID_CODECSETTINGS] = 'CodecSettings';
$EBMLidList[EBML_ID_COLOURSPACE] = 'ColourSpace';
$EBMLidList[EBML_ID_CONTENTCOMPALGO] = 'ContentCompAlgo';
$EBMLidList[EBML_ID_CONTENTCOMPRESSION] = 'ContentCompression';
$EBMLidList[EBML_ID_CONTENTCOMPSETTINGS] = 'ContentCompSettings';
$EBMLidList[EBML_ID_CONTENTENCALGO] = 'ContentEncAlgo';
$EBMLidList[EBML_ID_CONTENTENCKEYID] = 'ContentEncKeyID';
$EBMLidList[EBML_ID_CONTENTENCODING] = 'ContentEncoding';
$EBMLidList[EBML_ID_CONTENTENCODINGORDER] = 'ContentEncodingOrder';
$EBMLidList[EBML_ID_CONTENTENCODINGS] = 'ContentEncodings';
$EBMLidList[EBML_ID_CONTENTENCODINGSCOPE] = 'ContentEncodingScope';
$EBMLidList[EBML_ID_CONTENTENCODINGTYPE] = 'ContentEncodingType';
$EBMLidList[EBML_ID_CONTENTENCRYPTION] = 'ContentEncryption';
$EBMLidList[EBML_ID_CONTENTSIGALGO] = 'ContentSigAlgo';
$EBMLidList[EBML_ID_CONTENTSIGHASHALGO] = 'ContentSigHashAlgo';
$EBMLidList[EBML_ID_CONTENTSIGKEYID] = 'ContentSigKeyID';
$EBMLidList[EBML_ID_CONTENTSIGNATURE] = 'ContentSignature';
$EBMLidList[EBML_ID_CRC32] = 'CRC32';
$EBMLidList[EBML_ID_CUEBLOCKNUMBER] = 'CueBlockNumber';
$EBMLidList[EBML_ID_CUECLUSTERPOSITION] = 'CueClusterPosition';
$EBMLidList[EBML_ID_CUECODECSTATE] = 'CueCodecState';
$EBMLidList[EBML_ID_CUEPOINT] = 'CuePoint';
$EBMLidList[EBML_ID_CUEREFCLUSTER] = 'CueRefCluster';
$EBMLidList[EBML_ID_CUEREFCODECSTATE] = 'CueRefCodecState';
$EBMLidList[EBML_ID_CUEREFERENCE] = 'CueReference';
$EBMLidList[EBML_ID_CUEREFNUMBER] = 'CueRefNumber';
$EBMLidList[EBML_ID_CUEREFTIME] = 'CueRefTime';
$EBMLidList[EBML_ID_CUES] = 'Cues';
$EBMLidList[EBML_ID_CUETIME] = 'CueTime';
$EBMLidList[EBML_ID_CUETRACK] = 'CueTrack';
$EBMLidList[EBML_ID_CUETRACKPOSITIONS] = 'CueTrackPositions';
$EBMLidList[EBML_ID_DATEUTC] = 'DateUTC';
$EBMLidList[EBML_ID_DEFAULTDURATION] = 'DefaultDuration';
$EBMLidList[EBML_ID_DISPLAYHEIGHT] = 'DisplayHeight';
$EBMLidList[EBML_ID_DISPLAYUNIT] = 'DisplayUnit';
$EBMLidList[EBML_ID_DISPLAYWIDTH] = 'DisplayWidth';
$EBMLidList[EBML_ID_DOCTYPE] = 'DocType';
$EBMLidList[EBML_ID_DOCTYPEREADVERSION] = 'DocTypeReadVersion';
$EBMLidList[EBML_ID_DOCTYPEVERSION] = 'DocTypeVersion';
$EBMLidList[EBML_ID_DURATION] = 'Duration';
$EBMLidList[EBML_ID_EBML] = 'EBML';
$EBMLidList[EBML_ID_EBMLMAXIDLENGTH] = 'EBMLMaxIDLength';
$EBMLidList[EBML_ID_EBMLMAXSIZELENGTH] = 'EBMLMaxSizeLength';
$EBMLidList[EBML_ID_EBMLREADVERSION] = 'EBMLReadVersion';
$EBMLidList[EBML_ID_EBMLVERSION] = 'EBMLVersion';
$EBMLidList[EBML_ID_EDITIONENTRY] = 'EditionEntry';
$EBMLidList[EBML_ID_EDITIONFLAGDEFAULT] = 'EditionFlagDefault';
$EBMLidList[EBML_ID_EDITIONFLAGHIDDEN] = 'EditionFlagHidden';
$EBMLidList[EBML_ID_EDITIONFLAGORDERED] = 'EditionFlagOrdered';
$EBMLidList[EBML_ID_EDITIONUID] = 'EditionUID';
$EBMLidList[EBML_ID_FILEDATA] = 'FileData';
$EBMLidList[EBML_ID_FILEDESCRIPTION] = 'FileDescription';
$EBMLidList[EBML_ID_FILEMIMETYPE] = 'FileMimeType';
$EBMLidList[EBML_ID_FILENAME] = 'FileName';
$EBMLidList[EBML_ID_FILEREFERRAL] = 'FileReferral';
$EBMLidList[EBML_ID_FILEUID] = 'FileUID';
$EBMLidList[EBML_ID_FLAGDEFAULT] = 'FlagDefault';
$EBMLidList[EBML_ID_FLAGENABLED] = 'FlagEnabled';
$EBMLidList[EBML_ID_FLAGFORCED] = 'FlagForced';
$EBMLidList[EBML_ID_FLAGINTERLACED] = 'FlagInterlaced';
$EBMLidList[EBML_ID_FLAGLACING] = 'FlagLacing';
$EBMLidList[EBML_ID_GAMMAVALUE] = 'GammaValue';
$EBMLidList[EBML_ID_INFO] = 'Info';
$EBMLidList[EBML_ID_LANGUAGE] = 'Language';
$EBMLidList[EBML_ID_MAXBLOCKADDITIONID] = 'MaxBlockAdditionID';
$EBMLidList[EBML_ID_MAXCACHE] = 'MaxCache';
$EBMLidList[EBML_ID_MINCACHE] = 'MinCache';
$EBMLidList[EBML_ID_MUXINGAPP] = 'MuxingApp';
$EBMLidList[EBML_ID_NAME] = 'Name';
$EBMLidList[EBML_ID_NEXTFILENAME] = 'NextFilename';
$EBMLidList[EBML_ID_NEXTUID] = 'NextUID';
$EBMLidList[EBML_ID_OUTPUTSAMPLINGFREQUENCY] = 'OutputSamplingFrequency';
$EBMLidList[EBML_ID_PIXELCROPBOTTOM] = 'PixelCropBottom';
$EBMLidList[EBML_ID_PIXELCROPLEFT] = 'PixelCropLeft';
$EBMLidList[EBML_ID_PIXELCROPRIGHT] = 'PixelCropRight';
$EBMLidList[EBML_ID_PIXELCROPTOP] = 'PixelCropTop';
$EBMLidList[EBML_ID_PIXELHEIGHT] = 'PixelHeight';
$EBMLidList[EBML_ID_PIXELWIDTH] = 'PixelWidth';
$EBMLidList[EBML_ID_PREVFILENAME] = 'PrevFilename';
$EBMLidList[EBML_ID_PREVUID] = 'PrevUID';
$EBMLidList[EBML_ID_SAMPLINGFREQUENCY] = 'SamplingFrequency';
$EBMLidList[EBML_ID_SEEK] = 'Seek';
$EBMLidList[EBML_ID_SEEKHEAD] = 'SeekHead';
$EBMLidList[EBML_ID_SEEKID] = 'SeekID';
$EBMLidList[EBML_ID_SEEKPOSITION] = 'SeekPosition';
$EBMLidList[EBML_ID_SEGMENT] = 'Segment';
$EBMLidList[EBML_ID_SEGMENTFAMILY] = 'SegmentFamily';
$EBMLidList[EBML_ID_SEGMENTFILENAME] = 'SegmentFilename';
$EBMLidList[EBML_ID_SEGMENTUID] = 'SegmentUID';
$EBMLidList[EBML_ID_SIMPLETAG] = 'SimpleTag';
$EBMLidList[EBML_ID_CLUSTERSLICES] = 'ClusterSlices';
$EBMLidList[EBML_ID_STEREOMODE] = 'StereoMode';
$EBMLidList[EBML_ID_OLDSTEREOMODE] = 'OldStereoMode';
$EBMLidList[EBML_ID_TAG] = 'Tag';
$EBMLidList[EBML_ID_TAGATTACHMENTUID] = 'TagAttachmentUID';
$EBMLidList[EBML_ID_TAGBINARY] = 'TagBinary';
$EBMLidList[EBML_ID_TAGCHAPTERUID] = 'TagChapterUID';
$EBMLidList[EBML_ID_TAGDEFAULT] = 'TagDefault';
$EBMLidList[EBML_ID_TAGEDITIONUID] = 'TagEditionUID';
$EBMLidList[EBML_ID_TAGLANGUAGE] = 'TagLanguage';
$EBMLidList[EBML_ID_TAGNAME] = 'TagName';
$EBMLidList[EBML_ID_TAGTRACKUID] = 'TagTrackUID';
$EBMLidList[EBML_ID_TAGS] = 'Tags';
$EBMLidList[EBML_ID_TAGSTRING] = 'TagString';
$EBMLidList[EBML_ID_TARGETS] = 'Targets';
$EBMLidList[EBML_ID_TARGETTYPE] = 'TargetType';
$EBMLidList[EBML_ID_TARGETTYPEVALUE] = 'TargetTypeValue';
$EBMLidList[EBML_ID_TIMECODESCALE] = 'TimecodeScale';
$EBMLidList[EBML_ID_TITLE] = 'Title';
$EBMLidList[EBML_ID_TRACKENTRY] = 'TrackEntry';
$EBMLidList[EBML_ID_TRACKNUMBER] = 'TrackNumber';
$EBMLidList[EBML_ID_TRACKOFFSET] = 'TrackOffset';
$EBMLidList[EBML_ID_TRACKOVERLAY] = 'TrackOverlay';
$EBMLidList[EBML_ID_TRACKS] = 'Tracks';
$EBMLidList[EBML_ID_TRACKTIMECODESCALE] = 'TrackTimecodeScale';
$EBMLidList[EBML_ID_TRACKTRANSLATE] = 'TrackTranslate';
$EBMLidList[EBML_ID_TRACKTRANSLATECODEC] = 'TrackTranslateCodec';
$EBMLidList[EBML_ID_TRACKTRANSLATEEDITIONUID] = 'TrackTranslateEditionUID';
$EBMLidList[EBML_ID_TRACKTRANSLATETRACKID] = 'TrackTranslateTrackID';
$EBMLidList[EBML_ID_TRACKTYPE] = 'TrackType';
$EBMLidList[EBML_ID_TRACKUID] = 'TrackUID';
$EBMLidList[EBML_ID_VIDEO] = 'Video';
$EBMLidList[EBML_ID_VOID] = 'Void';
$EBMLidList[EBML_ID_WRITINGAPP] = 'WritingApp';
}
return (isset($EBMLidList[$value]) ? $EBMLidList[$value] : dechex($value));
}
/**
* @param int $value
*
* @return string
*/
public static function displayUnit($value) {
// http://www.matroska.org/technical/specs/index.html#DisplayUnit
static $units = array(
0 => 'pixels',
1 => 'centimeters',
2 => 'inches',
3 => 'Display Aspect Ratio');
return (isset($units[$value]) ? $units[$value] : 'unknown');
}