/**
* @return bool
*/
public function analyze()
{
$info =& $this->getid3->info;
$info['fileformat'] = 'quicktime';
$info['quicktime']['hinting'] = false;
$info['quicktime']['controller'] = 'standard';
// may be overridden if 'ctyp' atom is present
fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
$offset = 0;
$atomcounter = 0;
while ($offset < $info['avdataend']) {
if (!Helper::intValueSupported($offset)) {
$info['error'][] = 'Unable to parse atom at offset ' . $offset . ' because beyond ' . round(PHP_INT_MAX / 1073741824) . 'GB limit of PHP filesystem functions';
break;
}
fseek($this->getid3->fp, $offset, SEEK_SET);
$AtomHeader = fread($this->getid3->fp, 8);
$atomsize = Helper::BigEndian2Int(substr($AtomHeader, 0, 4));
$atomname = substr($AtomHeader, 4, 4);
// 64-bit MOV patch by jlegateØktnc*com
if ($atomsize == 1) {
$atomsize = Helper::BigEndian2Int(fread($this->getid3->fp, 8));
}
$info['quicktime'][$atomname]['name'] = $atomname;
$info['quicktime'][$atomname]['size'] = $atomsize;
$info['quicktime'][$atomname]['offset'] = $offset;
if ($offset + $atomsize > $info['avdataend']) {
$info['error'][] = 'Atom at offset ' . $offset . ' claims to go beyond end-of-file (length: ' . $atomsize . ' bytes)';
return false;
}
if ($atomsize == 0) {
// Furthermore, for historical reasons the list of atoms is optionally
// terminated by a 32-bit integer set to 0. If you are writing a program
// to read user data atoms, you should allow for the terminating 0.
break;
}
switch ($atomname) {
case 'mdat':
// Media DATa atom
// 'mdat' contains the actual data for the audio/video
if ($atomsize > 8 && (!isset($info['avdataend_tmp']) || $info['quicktime'][$atomname]['size'] > $info['avdataend_tmp'] - $info['avdataoffset'])) {
$info['avdataoffset'] = $info['quicktime'][$atomname]['offset'] + 8;
$OldAVDataEnd = $info['avdataend'];
$info['avdataend'] = $info['quicktime'][$atomname]['offset'] + $info['quicktime'][$atomname]['size'];
$getid3_temp = new GetId3Core();
$getid3_temp->openfile($this->getid3->filename);
$getid3_temp->info['avdataoffset'] = $info['avdataoffset'];
$getid3_temp->info['avdataend'] = $info['avdataend'];
$getid3_mp3 = new Module\Audio\Mp3($getid3_temp);
if ($getid3_mp3->MPEGaudioHeaderValid($getid3_mp3->MPEGaudioHeaderDecode(fread($this->getid3->fp, 4)))) {
$getid3_mp3->getOnlyMPEGaudioInfo($getid3_temp->info['avdataoffset'], false);
if (!empty($getid3_temp->info['warning'])) {
foreach ($getid3_temp->info['warning'] as $value) {
$info['warning'][] = $value;
}
}
if (!empty($getid3_temp->info['mpeg'])) {
$info['mpeg'] = $getid3_temp->info['mpeg'];
if (isset($info['mpeg']['audio'])) {
$info['audio']['dataformat'] = 'mp3';
$info['audio']['codec'] = !empty($info['mpeg']['audio']['encoder']) ? $info['mpeg']['audio']['encoder'] : (!empty($info['mpeg']['audio']['codec']) ? $info['mpeg']['audio']['codec'] : (!empty($info['mpeg']['audio']['LAME']) ? 'LAME' : 'mp3'));
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
$info['audio']['channels'] = $info['mpeg']['audio']['channels'];
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
$info['bitrate'] = $info['audio']['bitrate'];
}
}
}
unset($getid3_mp3, $getid3_temp);
$info['avdataend'] = $OldAVDataEnd;
unset($OldAVDataEnd);
}
break;
case 'free':
// FREE space atom
// FREE space atom
case 'skip':
// SKIP atom
// SKIP atom
case 'wide':
// 64-bit expansion placeholder atom
// 'free', 'skip' and 'wide' are just padding, contains no useful data at all
break;
default:
$atomHierarchy = array();
$info['quicktime'][$atomname] = $this->QuicktimeParseAtom($atomname, $atomsize, fread($this->getid3->fp, $atomsize), $offset, $atomHierarchy, $this->ParseAllPossibleAtoms);
break;
}
$offset += $atomsize;
++$atomcounter;
}
if (!empty($info['avdataend_tmp'])) {
// this value is assigned to a temp value and then erased because
// otherwise any atoms beyond the 'mdat' atom would not get parsed
$info['avdataend'] = $info['avdataend_tmp'];
unset($info['avdataend_tmp']);
}
if (!isset($info['bitrate']) && isset($info['playtime_seconds'])) {
$info['bitrate'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['playtime_seconds'];
}
if (isset($info['bitrate']) && !isset($info['audio']['bitrate']) && !isset($info['quicktime']['video'])) {
$info['audio']['bitrate'] = $info['bitrate'];
}
if (!empty($info['playtime_seconds']) && !isset($info['video']['frame_rate']) && !empty($info['quicktime']['stts_framecount'])) {
foreach ($info['quicktime']['stts_framecount'] as $key => $samples_count) {
$samples_per_second = $samples_count / $info['playtime_seconds'];
if ($samples_per_second > 240) {
// has to be audio samples
} else {
$info['video']['frame_rate'] = $samples_per_second;
break;
}
}
}
if ($info['audio']['dataformat'] == 'mp4' && empty($info['video']['resolution_x'])) {
$info['fileformat'] = 'mp4';
$info['mime_type'] = 'audio/mp4';
unset($info['video']['dataformat']);
}
if (!$this->ReturnAtomData) {
unset($info['quicktime']['moov']);
}
if (empty($info['audio']['dataformat']) && !empty($info['quicktime']['audio'])) {
$info['audio']['dataformat'] = 'quicktime';
}
if (empty($info['video']['dataformat']) && !empty($info['quicktime']['video'])) {
$info['video']['dataformat'] = 'quicktime';
}
return true;
}
