function getAACADTSheaderFilepointer(&$fd, &$ThisFileInfo, $MaxFramesToScan = 1000000, $ReturnExtendedInfo = false)
{
// based loosely on code from AACfile by Jurgen Faul
// jfaul@gmx.de http://jfaul.de/atl
// http://faac.sourceforge.net/wiki/index.php?page=ADTS
// * ADTS Fixed Header: these don't change from frame to frame
// syncword 12 always: '111111111111'
// ID 1 0: MPEG-4, 1: MPEG-2
// layer 2 always: '00'
// protection_absent 1
// profile 2
// sampling_frequency_index 4
// private_bit 1
// channel_configuration 3
// original/copy 1
// home 1
// emphasis 2 only if ID == 0 (ie MPEG-4)
// * ADTS Variable Header: these can change from frame to frame
// copyright_identification_bit 1
// copyright_identification_start 1
// aac_frame_length 13 length of the frame including header (in bytes)
// adts_buffer_fullness 11 0x7FF indicates VBR
// no_raw_data_blocks_in_frame 2
// * ADTS Error check
// crc_check 16 only if protection_absent == 0
$byteoffset = 0;
$framenumber = 0;
// Init bit pattern array
static $decbin = array();
// Populate $bindec
for ($i = 0; $i < 256; $i++) {
$decbin[chr($i)] = str_pad(decbin($i), 8, '0', STR_PAD_LEFT);
}
// used to calculate bitrate below
static $BitrateCache = array();
while (true) {
// breaks out when end-of-file encountered, or invalid data found,
// or MaxFramesToScan frames have been scanned
fseek($fd, $byteoffset, SEEK_SET);
// First get substring
$substring = fread($fd, 10);
$substringlength = strlen($substring);
if ($substringlength != 10) {
$ThisFileInfo['error'] .= "\n" . 'Failed to read 10 bytes at offset ' . (ftell($fd) - $substringlength) . ' (only read ' . $substringlength . ' bytes)';
return false;
}
// Initialise $AACheaderBitstream
$AACheaderBitstream = '';
// Loop thru substring chars
for ($i = 0; $i < 10; $i++) {
$AACheaderBitstream .= $decbin[$substring[$i]];
}
$bitoffset = 0;
$synctest = bindec(substr($AACheaderBitstream, $bitoffset, 12));
$bitoffset += 12;
if ($synctest != 0xfff) {
$ThisFileInfo['error'] .= "\n" . 'Synch pattern (0x0FFF) not found at offset ' . (ftell($fd) - 10) . ' (found 0x0' . strtoupper(dechex($synctest)) . ' instead)';
if ($ThisFileInfo['fileformat'] == 'aac') {
return true;
}
return false;
}
// Gather info for first frame only - this takes time to do 1000 times!
if ($framenumber > 0) {
if (!$AACheaderBitstream[$bitoffset]) {
// MPEG-4
$bitoffset += 20;
} else {
// MPEG-2
$bitoffset += 18;
}
} else {
$ThisFileInfo['aac']['header_type'] = 'ADTS';
$ThisFileInfo['aac']['header']['synch'] = $synctest;
$ThisFileInfo['fileformat'] = 'aac';
$ThisFileInfo['audio']['dataformat'] = 'aac';
$ThisFileInfo['aac']['header']['mpeg_version'] = substr($AACheaderBitstream, $bitoffset, 1) == '0' ? 4 : 2;
$bitoffset += 1;
$ThisFileInfo['aac']['header']['layer'] = Bin2Dec(substr($AACheaderBitstream, $bitoffset, 2));
$bitoffset += 2;
if ($ThisFileInfo['aac']['header']['layer'] != 0) {
$ThisFileInfo['error'] .= "\n" . 'Layer error - expected 0x00, found 0x' . dechex($ThisFileInfo['aac']['header']['layer']) . ' instead';
return false;
}
$ThisFileInfo['aac']['header']['crc_present'] = substr($AACheaderBitstream, $bitoffset, 1) == '0' ? true : false;
$bitoffset += 1;
$ThisFileInfo['aac']['header']['profile_id'] = Bin2Dec(substr($AACheaderBitstream, $bitoffset, 2));
$bitoffset += 2;
$ThisFileInfo['aac']['header']['profile_text'] = AACprofileLookup($ThisFileInfo['aac']['header']['profile_id'], $ThisFileInfo['aac']['header']['mpeg_version']);
$ThisFileInfo['aac']['header']['sample_frequency_index'] = Bin2Dec(substr($AACheaderBitstream, $bitoffset, 4));
$bitoffset += 4;
$ThisFileInfo['aac']['header']['sample_frequency'] = AACsampleRateLookup($ThisFileInfo['aac']['header']['sample_frequency_index']);
if ($ThisFileInfo['aac']['header']['sample_frequency'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt AAC file: sample_frequency == zero';
return false;
}
$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['aac']['header']['sample_frequency'];
$ThisFileInfo['aac']['header']['private'] = (bool) Bin2Dec(substr($AACheaderBitstream, $bitoffset, 1));
$bitoffset += 1;
$ThisFileInfo['aac']['header']['channel_configuration'] = Bin2Dec(substr($AACheaderBitstream, $bitoffset, 3));
$bitoffset += 3;
$ThisFileInfo['audio']['channels'] = $ThisFileInfo['aac']['header']['channel_configuration'];
$ThisFileInfo['aac']['header']['original'] = (bool) Bin2Dec(substr($AACheaderBitstream, $bitoffset, 1));
$bitoffset += 1;
$ThisFileInfo['aac']['header']['home'] = (bool) Bin2Dec(substr($AACheaderBitstream, $bitoffset, 1));
$bitoffset += 1;
if ($ThisFileInfo['aac']['header']['mpeg_version'] == 4) {
$ThisFileInfo['aac']['header']['emphasis'] = Bin2Dec(substr($AACheaderBitstream, $bitoffset, 2));
$bitoffset += 2;
}
if ($ReturnExtendedInfo) {
$ThisFileInfo['aac'][$framenumber]['copyright_id_bit'] = (bool) Bin2Dec(substr($AACheaderBitstream, $bitoffset, 1));
$bitoffset += 1;
$ThisFileInfo['aac'][$framenumber]['copyright_id_start'] = (bool) Bin2Dec(substr($AACheaderBitstream, $bitoffset, 1));
$bitoffset += 1;
} else {
$bitoffset += 2;
}
}
$FrameLength = bindec(substr($AACheaderBitstream, $bitoffset, 13));
if (!isset($BitrateCache[$FrameLength])) {
$BitrateCache[$FrameLength] = $ThisFileInfo['aac']['header']['sample_frequency'] / 1024 * $FrameLength * 8;
}
safe_inc($ThisFileInfo['aac']['bitrate_distribution'][$BitrateCache[$FrameLength]]);
$ThisFileInfo['aac'][$framenumber]['aac_frame_length'] = $FrameLength;
$bitoffset += 13;
$ThisFileInfo['aac'][$framenumber]['adts_buffer_fullness'] = bindec(substr($AACheaderBitstream, $bitoffset, 11));
$bitoffset += 11;
if ($ThisFileInfo['aac'][$framenumber]['adts_buffer_fullness'] == 0x7ff) {
$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
} else {
$ThisFileInfo['audio']['bitrate_mode'] = 'cbr';
}
$ThisFileInfo['aac'][$framenumber]['num_raw_data_blocks'] = bindec(substr($AACheaderBitstream, $bitoffset, 2));
$bitoffset += 2;
if ($ThisFileInfo['aac']['header']['crc_present']) {
//$ThisFileInfo['aac'][$framenumber]['crc'] = bindec(substr($AACheaderBitstream, $bitoffset, 16));
$bitoffset += 16;
}
if (!$ReturnExtendedInfo) {
unset($ThisFileInfo['aac'][$framenumber]);
}
$byteoffset += $FrameLength;
if (++$framenumber < $MaxFramesToScan && $byteoffset + 10 < $ThisFileInfo['avdataend']) {
// keep scanning
} else {
$ThisFileInfo['aac']['frames'] = $framenumber;
$ThisFileInfo['playtime_seconds'] = $ThisFileInfo['avdataend'] / $byteoffset * ($framenumber * 1024 / $ThisFileInfo['aac']['header']['sample_frequency']);
// (1 / % of file scanned) * (samples / (samples/sec)) = seconds
if ($ThisFileInfo['playtime_seconds'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt AAC file: playtime_seconds == zero';
return false;
}
$ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 / $ThisFileInfo['playtime_seconds'];
ksort($ThisFileInfo['aac']['bitrate_distribution']);
return true;
}
}
// should never get here.
}
set_time_limit(30);
if (!file_exists($row['filename']) || filesize($row['filename']) != $row['filesize']) {
$totalremoved++;
echo $row['filename'] . '<BR>';
flush();
$SQLquery = 'DELETE FROM files WHERE (filename = "' . FixDBFields($row['filename']) . '")';
safe_mysql_query($SQLquery);
}
}
echo number_format($totalremoved) . ' of ' . number_format($totalchecked) . ' files in database no longer exist - removed from database.<HR>';
} elseif (!empty($_REQUEST['audiobitrates'])) {
$BitrateDistribution = array();
$SQLquery = 'SELECT ROUND(audio_bitrate) AS RoundBitrate, COUNT(*) AS num FROM files GROUP BY ROUND(audio_bitrate)';
$result = safe_mysql_query($SQLquery);
while ($row = mysql_fetch_array($result)) {
safe_inc($BitrateDistribution[ClosestStandardMP3Bitrate($row['RoundBitrate'])], $row['num']);
}
echo '<TABLE BORDER="1" CELLSPACING="0" CELLPADDING="3">';
echo '<TR><TH>Bitrate</TH><TH>Count</TH></TR>';
foreach ($BitrateDistribution as $Bitrate => $Count) {
echo '<TR>';
echo '<TD ALIGN="RIGHT">' . $Bitrate . ' kbps</TD>';
echo '<TD ALIGN="RIGHT">' . number_format($Count) . '</TD>';
echo '</TR>';
}
echo '</TABLE>';
} elseif (!empty($_REQUEST['tagtypes'])) {
echo 'Files with tags:<BR>';
echo '<TABLE BORDER="1" CELLSPACING="0" CELLPADDING="3">';
echo '<TR><TH>Tags</TH><TH>Count</TH></TR>';
$SQLquery = 'SELECT tags, COUNT(*) AS num FROM files';
function QuicktimeParseAtom($atomname, $atomsize, $atomdata, &$ThisFileInfo, $baseoffset, &$atomHierarchy)
{
// http://developer.apple.com/techpubs/quicktime/qtdevdocs/APIREF/INDEX/atomalphaindex.htm
array_push($atomHierarchy, $atomname);
$atomstructure['hierarchy'] = implode(' ', $atomHierarchy);
$atomstructure['name'] = $atomname;
$atomstructure['size'] = $atomsize;
$atomstructure['offset'] = $baseoffset;
switch ($atomname) {
case 'moov':
// MOVie container atom
// MOVie container atom
case 'trak':
// TRAcK container atom
// TRAcK container atom
case 'clip':
// CLIPping container atom
// CLIPping container atom
case 'matt':
// track MATTe container atom
// track MATTe container atom
case 'edts':
// EDiTS container atom
// EDiTS container atom
case 'tref':
// Track REFerence container atom
// Track REFerence container atom
case 'mdia':
// MeDIA container atom
// MeDIA container atom
case 'minf':
// Media INFormation container atom
// Media INFormation container atom
case 'dinf':
// Data INFormation container atom
// Data INFormation container atom
case 'udta':
// User DaTA container atom
// User DaTA container atom
case 'stbl':
// Sample TaBLe container atom
// Sample TaBLe container atom
case 'cmov':
// Compressed MOVie container atom
// Compressed MOVie container atom
case 'rmra':
// Reference Movie Record Atom
// Reference Movie Record Atom
case 'rmda':
// Reference Movie Descriptor Atom
$atomstructure['subatoms'] = QuicktimeParseContainerAtom($atomdata, $ThisFileInfo, $baseoffset + 8, $atomHierarchy);
break;
case '©cpy':
case '©day':
case '©dir':
case '©ed1':
case '©ed2':
case '©ed3':
case '©ed4':
case '©ed5':
case '©ed6':
case '©ed7':
case '©ed8':
case '©ed9':
case '©fmt':
case '©inf':
case '©prd':
case '©prf':
case '©req':
case '©src':
case '©wrt':
case '©nam':
case '©cmt':
case '©wrn':
case '©hst':
case '©mak':
case '©mod':
case '©PRD':
case '©swr':
case '©aut':
case '©ART':
case '©trk':
case '©alb':
case '©com':
case '©gen':
case '©ope':
case '©url':
case '©enc':
$atomstructure['data_length'] = BigEndian2Int(substr($atomdata, 0, 2));
$atomstructure['language_id'] = BigEndian2Int(substr($atomdata, 2, 2));
$atomstructure['data'] = substr($atomdata, 4);
$atomstructure['language'] = QuicktimeLanguageLookup($atomstructure['language_id']);
$handyatomtranslatorarray['©cpy'] = 'copyright';
$handyatomtranslatorarray['©day'] = 'creation_date';
$handyatomtranslatorarray['©dir'] = 'director';
$handyatomtranslatorarray['©ed1'] = 'edit1';
$handyatomtranslatorarray['©ed2'] = 'edit2';
$handyatomtranslatorarray['©ed3'] = 'edit3';
$handyatomtranslatorarray['©ed4'] = 'edit4';
$handyatomtranslatorarray['©ed5'] = 'edit5';
$handyatomtranslatorarray['©ed6'] = 'edit6';
$handyatomtranslatorarray['©ed7'] = 'edit7';
$handyatomtranslatorarray['©ed8'] = 'edit8';
$handyatomtranslatorarray['©ed9'] = 'edit9';
$handyatomtranslatorarray['©fmt'] = 'format';
$handyatomtranslatorarray['©inf'] = 'information';
$handyatomtranslatorarray['©prd'] = 'producer';
$handyatomtranslatorarray['©prf'] = 'performers';
$handyatomtranslatorarray['©req'] = 'system_requirements';
$handyatomtranslatorarray['©src'] = 'source_credit';
$handyatomtranslatorarray['©wrt'] = 'writer';
// http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
$handyatomtranslatorarray['©nam'] = 'title';
$handyatomtranslatorarray['©cmt'] = 'comment';
$handyatomtranslatorarray['©wrn'] = 'warning';
$handyatomtranslatorarray['©hst'] = 'host_computer';
$handyatomtranslatorarray['©mak'] = 'make';
$handyatomtranslatorarray['©mod'] = 'model';
$handyatomtranslatorarray['©PRD'] = 'product';
$handyatomtranslatorarray['©swr'] = 'software';
$handyatomtranslatorarray['©aut'] = 'author';
$handyatomtranslatorarray['©ART'] = 'artist';
$handyatomtranslatorarray['©trk'] = 'track';
$handyatomtranslatorarray['©alb'] = 'album';
$handyatomtranslatorarray['©com'] = 'comment';
$handyatomtranslatorarray['©gen'] = 'genre';
$handyatomtranslatorarray['©ope'] = 'composer';
$handyatomtranslatorarray['©url'] = 'url';
$handyatomtranslatorarray['©enc'] = 'encoder';
if (isset($handyatomtranslatorarray["{$atomname}"])) {
$ThisFileInfo['quicktime']['comments'][$handyatomtranslatorarray["{$atomname}"]][] = $atomstructure['data'];
}
break;
case 'play':
// auto-PLAY atom
$atomstructure['autoplay'] = (bool) BigEndian2Int(substr($atomdata, 0, 1));
$ThisFileInfo['quicktime']['autoplay'] = $atomstructure['autoplay'];
break;
case 'WLOC':
// Window LOCation atom
$atomstructure['location_x'] = BigEndian2Int(substr($atomdata, 0, 2));
$atomstructure['location_y'] = BigEndian2Int(substr($atomdata, 2, 2));
break;
case 'LOOP':
// LOOPing atom
// LOOPing atom
case 'SelO':
// play SELection Only atom
// play SELection Only atom
case 'AllF':
// play ALL Frames atom
$atomstructure['data'] = BigEndian2Int($atomdata);
break;
case 'name':
//
//
case 'MCPS':
// Media Cleaner PRo
// Media Cleaner PRo
case '@PRM':
// adobe PReMiere version
// adobe PReMiere version
case '@PRQ':
// adobe PRemiere Quicktime version
$atomstructure['data'] = $atomdata;
break;
case 'cmvd':
// Compressed MooV Data atom
$ThisFileInfo['warning'] .= "\n" . 'Compressed Quicktime MOOV Data atoms ("cmvd") not supported';
break;
case 'dcom':
// Data COMpression atom
$atomstructure['compression_id'] = $atomdata;
$atomstructure['compression_text'] = QuicktimeDCOMLookup($atomdata);
break;
case 'rdrf':
// Reference movie Data ReFerence atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['flags']['internal_data'] = (bool) ($atomstructure['flags_raw'] & 0x1);
$atomstructure['reference_type_name'] = substr($atomdata, 4, 4);
$atomstructure['reference_length'] = BigEndian2Int(substr($atomdata, 8, 4));
switch ($atomstructure['reference_type_name']) {
case 'url ':
$atomstructure['url'] = NoNullString(substr($atomdata, 12));
break;
case 'alis':
$atomstructure['file_alias'] = substr($atomdata, 12);
break;
case 'rsrc':
$atomstructure['resource_alias'] = substr($atomdata, 12);
break;
default:
$atomstructure['data'] = substr($atomdata, 12);
break;
}
break;
case 'rmqu':
// Reference Movie QUality atom
$atomstructure['movie_quality'] = BigEndian2Int($atomdata);
break;
case 'rmcs':
// Reference Movie Cpu Speed atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['cpu_speed_rating'] = BigEndian2Int(substr($atomdata, 4, 2));
break;
case 'rmvc':
// Reference Movie Version Check atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['gestalt_selector'] = substr($atomdata, 4, 4);
$atomstructure['gestalt_value_mask'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['gestalt_value'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['gestalt_check_type'] = BigEndian2Int(substr($atomdata, 14, 2));
break;
case 'rmcd':
// Reference Movie Component check atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['component_type'] = substr($atomdata, 4, 4);
$atomstructure['component_subtype'] = substr($atomdata, 8, 4);
$atomstructure['component_manufacturer'] = substr($atomdata, 12, 4);
$atomstructure['component_flags_raw'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['component_flags_mask'] = BigEndian2Int(substr($atomdata, 20, 4));
$atomstructure['component_min_version'] = BigEndian2Int(substr($atomdata, 24, 4));
break;
case 'rmdr':
// Reference Movie Data Rate atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['data_rate'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['data_rate_bps'] = $atomstructure['data_rate'] * 10;
break;
case 'rmla':
// Reference Movie Language Atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['language_id'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['language'] = QuicktimeLanguageLookup($atomstructure['language_id']);
break;
case 'rmla':
// Reference Movie Language Atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['track_id'] = BigEndian2Int(substr($atomdata, 4, 2));
break;
case 'stsd':
// Sample Table Sample Description atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stsdEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['sample_description_table'][$i]['size'] = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 4));
$stsdEntriesDataOffset += 4;
$atomstructure['sample_description_table'][$i]['data_format'] = substr($atomdata, $stsdEntriesDataOffset, 4);
$stsdEntriesDataOffset += 4;
$atomstructure['sample_description_table'][$i]['reserved'] = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 6));
$stsdEntriesDataOffset += 6;
$atomstructure['sample_description_table'][$i]['reference_index'] = BigEndian2Int(substr($atomdata, $stsdEntriesDataOffset, 2));
$stsdEntriesDataOffset += 2;
$atomstructure['sample_description_table'][$i]['data'] = substr($atomdata, $stsdEntriesDataOffset, $atomstructure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2);
$stsdEntriesDataOffset += $atomstructure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2;
$atomstructure['sample_description_table'][$i]['encoder_version'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 0, 2));
$atomstructure['sample_description_table'][$i]['encoder_revision'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 2, 2));
$atomstructure['sample_description_table'][$i]['encoder_vendor'] = substr($atomstructure['sample_description_table'][$i]['data'], 4, 4);
if ($atomstructure['sample_description_table'][$i]['encoder_vendor'] == chr(0) . chr(0) . chr(0) . chr(0)) {
// audio atom
$atomstructure['sample_description_table'][$i]['audio_channels'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 8, 2));
$atomstructure['sample_description_table'][$i]['audio_bit_depth'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 10, 2));
$atomstructure['sample_description_table'][$i]['audio_compression_id'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12, 2));
$atomstructure['sample_description_table'][$i]['audio_packet_size'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 14, 2));
$atomstructure['sample_description_table'][$i]['audio_sample_rate'] = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 16, 4));
$ThisFileInfo['quicktime']['audio']['codec'] = QuicktimeAudioCodecLookup($atomstructure['sample_description_table'][$i]['data_format']);
$ThisFileInfo['quicktime']['audio']['sample_rate'] = $atomstructure['sample_description_table'][$i]['audio_sample_rate'];
$ThisFileInfo['quicktime']['audio']['channels'] = $atomstructure['sample_description_table'][$i]['audio_channels'];
$ThisFileInfo['quicktime']['audio']['bit_depth'] = $atomstructure['sample_description_table'][$i]['audio_bit_depth'];
$ThisFileInfo['audio']['codec'] = $ThisFileInfo['quicktime']['audio']['codec'];
$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['quicktime']['audio']['sample_rate'];
$ThisFileInfo['audio']['channels'] = $ThisFileInfo['quicktime']['audio']['channels'];
$ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['quicktime']['audio']['bit_depth'];
if ($ThisFileInfo['audio']['codec'] == 'raw PCM') {
$ThisFileInfo['audio']['lossless'] = true;
} else {
$ThisFileInfo['audio']['lossless'] = false;
}
} else {
// video atom
$atomstructure['sample_description_table'][$i]['video_temporal_quality'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 8, 4));
$atomstructure['sample_description_table'][$i]['video_spatial_quality'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 12, 4));
$atomstructure['sample_description_table'][$i]['video_frame_width'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 16, 2));
$atomstructure['sample_description_table'][$i]['video_frame_height'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 18, 2));
$atomstructure['sample_description_table'][$i]['video_resolution_x'] = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 20, 4));
$atomstructure['sample_description_table'][$i]['video_resolution_y'] = FixedPoint16_16(substr($atomstructure['sample_description_table'][$i]['data'], 24, 4));
$atomstructure['sample_description_table'][$i]['video_data_size'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 28, 4));
$atomstructure['sample_description_table'][$i]['video_frame_count'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 32, 2));
$atomstructure['sample_description_table'][$i]['video_encoder_name_len'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 34, 1));
$atomstructure['sample_description_table'][$i]['video_encoder_name'] = substr($atomstructure['sample_description_table'][$i]['data'], 35, $atomstructure['sample_description_table'][$i]['video_encoder_name_len']);
$atomstructure['sample_description_table'][$i]['video_pixel_color_depth'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 66, 2));
$atomstructure['sample_description_table'][$i]['video_color_table_id'] = BigEndian2Int(substr($atomstructure['sample_description_table'][$i]['data'], 68, 2));
$atomstructure['sample_description_table'][$i]['video_pixel_color_type'] = $atomstructure['sample_description_table'][$i]['video_pixel_color_depth'] > 32 ? 'grayscale' : 'color';
$atomstructure['sample_description_table'][$i]['video_pixel_color_name'] = QuicktimeColorNameLookup($atomstructure['sample_description_table'][$i]['video_pixel_color_depth']);
if ($atomstructure['sample_description_table'][$i]['video_pixel_color_name'] != 'invalid') {
//$ThisFileInfo['quicktime']['video']['codec'] = QuicktimeVideoCodecLookup($atomstructure['sample_description_table'][$i]['data_format']);
$ThisFileInfo['quicktime']['video']['codec'] = $atomstructure['sample_description_table'][$i]['video_encoder_name'];
$ThisFileInfo['quicktime']['video']['color_depth'] = $atomstructure['sample_description_table'][$i]['video_pixel_color_depth'];
$ThisFileInfo['quicktime']['video']['color_depth_name'] = $atomstructure['sample_description_table'][$i]['video_pixel_color_name'];
$ThisFileInfo['video']['codec'] = $ThisFileInfo['quicktime']['video']['codec'];
$ThisFileInfo['video']['bits_per_sample'] = $ThisFileInfo['quicktime']['video']['color_depth'];
}
$ThisFileInfo['video']['lossless'] = false;
}
switch ($atomstructure['sample_description_table'][$i]['data_format']) {
case 'mp4a':
$ThisFileInfo['fileformat'] = 'mp4';
$ThisFileInfo['mime_type'] = 'audio/mp4';
unset($ThisFileInfo['video']['dataformat']);
break;
default:
// do nothing
break;
}
unset($atomstructure['sample_description_table'][$i]['data']);
}
break;
case 'stts':
// Sample Table Time-to-Sample atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$sttsEntriesDataOffset = 8;
$FrameRateCalculatorArray = array();
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['time_to_sample_table'][$i]['sample_count'] = BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
$sttsEntriesDataOffset += 4;
$atomstructure['time_to_sample_table'][$i]['sample_duration'] = BigEndian2Int(substr($atomdata, $sttsEntriesDataOffset, 4));
$sttsEntriesDataOffset += 4;
safe_inc($FrameRateCalculatorArray[$ThisFileInfo['quicktime']['time_scale'] / $atomstructure['time_to_sample_table'][$i]['sample_duration']], $atomstructure['time_to_sample_table'][$i]['sample_count']);
}
$sttsFramesTotal = 0;
$sttsSecondsTotal = 0;
foreach ($FrameRateCalculatorArray as $frames_per_second => $frame_count) {
if ($frames_per_second > 60 || $frames_per_second == 0) {
// not video FPS information, probably audio information
$sttsFramesTotal = 0;
$sttsSecondsTotal = 0;
break;
}
$sttsFramesTotal += $frame_count;
$sttsSecondsTotal += $frame_count / $frames_per_second;
}
if ($sttsFramesTotal > 0 && $sttsSecondsTotal > 0) {
$ThisFileInfo['video']['frame_rate'] = $sttsFramesTotal / $sttsSecondsTotal;
}
break;
case 'stss':
// Sample Table Sync Sample (key frames) atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stssEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['time_to_sample_table'][$i] = BigEndian2Int(substr($atomdata, $stssEntriesDataOffset, 4));
$stssEntriesDataOffset += 4;
}
break;
case 'stsc':
// Sample Table Sample-to-Chunk atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stscEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['sample_to_chunk_table'][$i]['first_chunk'] = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
$stscEntriesDataOffset += 4;
$atomstructure['sample_to_chunk_table'][$i]['samples_per_chunk'] = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
$stscEntriesDataOffset += 4;
$atomstructure['sample_to_chunk_table'][$i]['sample_description'] = BigEndian2Int(substr($atomdata, $stscEntriesDataOffset, 4));
$stscEntriesDataOffset += 4;
}
break;
case 'stsz':
// Sample Table SiZe atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['sample_size'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 8, 4));
$stszEntriesDataOffset = 12;
if ($atomstructure['sample_size'] == 0) {
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['sample_size_table'][$i] = BigEndian2Int(substr($atomdata, $stszEntriesDataOffset, 4));
$stszEntriesDataOffset += 4;
}
}
break;
case 'stco':
// Sample Table Chunk Offset atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$stcoEntriesDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['chunk_offset_table'][$i] = BigEndian2Int(substr($atomdata, $stcoEntriesDataOffset, 4));
$stcoEntriesDataOffset += 4;
}
break;
case 'dref':
// Data REFerence atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
$drefDataOffset = 8;
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['data_references'][$i]['size'] = BigEndian2Int(substr($atomdata, $drefDataOffset, 4));
$drefDataOffset += 4;
$atomstructure['data_references'][$i]['type'] = substr($atomdata, $drefDataOffset, 4);
$drefDataOffset += 4;
$atomstructure['data_references'][$i]['version'] = BigEndian2Int(substr($atomdata, $drefDataOffset, 1));
$drefDataOffset += 1;
$atomstructure['data_references'][$i]['flags_raw'] = BigEndian2Int(substr($atomdata, $drefDataOffset, 3));
// hardcoded: 0x000
$drefDataOffset += 3;
$atomstructure['data_references'][$i]['data'] = substr($atomdata, $drefDataOffset, $atomstructure['data_references'][$i]['size'] - 4 - 4 - 1 - 3);
$drefDataOffset += $atomstructure['data_references'][$i]['size'] - 4 - 4 - 1 - 3;
$atomstructure['data_references'][$i]['flags']['self_reference'] = (bool) ($atomstructure['data_references'][$i]['flags_raw'] & 0x1);
}
break;
case 'gmin':
// base Media INformation atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['graphics_mode'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['opcolor_red'] = BigEndian2Int(substr($atomdata, 6, 2));
$atomstructure['opcolor_green'] = BigEndian2Int(substr($atomdata, 8, 2));
$atomstructure['opcolor_blue'] = BigEndian2Int(substr($atomdata, 10, 2));
$atomstructure['balance'] = BigEndian2Int(substr($atomdata, 12, 2));
$atomstructure['reserved'] = BigEndian2Int(substr($atomdata, 14, 2));
break;
case 'smhd':
// Sound Media information HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['balance'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['reserved'] = BigEndian2Int(substr($atomdata, 6, 2));
break;
case 'vmhd':
// Video Media information HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['graphics_mode'] = BigEndian2Int(substr($atomdata, 4, 2));
$atomstructure['opcolor_red'] = BigEndian2Int(substr($atomdata, 6, 2));
$atomstructure['opcolor_green'] = BigEndian2Int(substr($atomdata, 8, 2));
$atomstructure['opcolor_blue'] = BigEndian2Int(substr($atomdata, 10, 2));
$atomstructure['flags']['no_lean_ahead'] = (bool) ($atomstructure['flags_raw'] & 0x1);
break;
case 'hdlr':
// HanDLeR reference atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['component_type'] = substr($atomdata, 4, 4);
$atomstructure['component_subtype'] = substr($atomdata, 8, 4);
$atomstructure['component_manufacturer'] = substr($atomdata, 12, 4);
$atomstructure['component_flags_raw'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['component_flags_mask'] = BigEndian2Int(substr($atomdata, 20, 4));
$atomstructure['component_name'] = Pascal2String(substr($atomdata, 24));
break;
case 'mdhd':
// MeDia HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['creation_time'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['modify_time'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['time_scale'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['duration'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['language_id'] = BigEndian2Int(substr($atomdata, 20, 2));
$atomstructure['quality'] = BigEndian2Int(substr($atomdata, 22, 2));
if ($atomstructure['time_scale'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt Quicktime file: mdhd.time_scale == zero';
return false;
}
$atomstructure['creation_time_unix'] = DateMac2Unix($atomstructure['creation_time']);
$atomstructure['modify_time_unix'] = DateMac2Unix($atomstructure['modify_time']);
$atomstructure['playtime_seconds'] = $atomstructure['duration'] / $atomstructure['time_scale'];
$atomstructure['language'] = QuicktimeLanguageLookup($atomstructure['language_id']);
break;
case 'pnot':
// Preview atom
$atomstructure['modification_date'] = BigEndian2Int(substr($atomdata, 0, 4));
// "standard Macintosh format"
$atomstructure['version_number'] = BigEndian2Int(substr($atomdata, 4, 2));
// hardcoded: 0x00
$atomstructure['atom_type'] = substr($atomdata, 6, 4);
// usually: 'PICT'
$atomstructure['atom_index'] = BigEndian2Int(substr($atomdata, 10, 2));
// usually: 0x01
$atomstructure['modification_date_unix'] = DateMac2Unix($atomstructure['modification_date']);
break;
case 'crgn':
// Clipping ReGioN atom
$atomstructure['region_size'] = BigEndian2Int(substr($atomdata, 0, 2));
// The Region size, Region boundary box,
$atomstructure['boundary_box'] = BigEndian2Int(substr($atomdata, 2, 8));
// and Clipping region data fields
$atomstructure['clipping_data'] = substr($atomdata, 10);
// constitute a QuickDraw region.
break;
case 'load':
// track LOAD settings atom
$atomstructure['preload_start_time'] = BigEndian2Int(substr($atomdata, 0, 4));
$atomstructure['preload_duration'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['preload_flags_raw'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['default_hints_raw'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['default_hints']['double_buffer'] = (bool) ($atomstructure['default_hints_raw'] & 0x20);
$atomstructure['default_hints']['high_quality'] = (bool) ($atomstructure['default_hints_raw'] & 0x100);
break;
case 'tmcd':
// TiMe CoDe atom
// TiMe CoDe atom
case 'chap':
// CHAPter list atom
// CHAPter list atom
case 'sync':
// SYNChronization atom
// SYNChronization atom
case 'scpt':
// tranSCriPT atom
// tranSCriPT atom
case 'ssrc':
// non-primary SouRCe atom
for ($i = 0; $i < strlen($atomdata) % 4; $i++) {
$atomstructure['track_id'][$i] = BigEndian2Int(substr($atomdata, $i * 4, 4));
}
break;
case 'elst':
// Edit LiST atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['number_entries'] = BigEndian2Int(substr($atomdata, 4, 4));
for ($i = 0; $i < $atomstructure['number_entries']; $i++) {
$atomstructure['edit_list'][$i]['track_duration'] = BigEndian2Int(substr($atomdata, 8 + $i * 12 + 0, 4));
$atomstructure['edit_list'][$i]['media_time'] = BigEndian2Int(substr($atomdata, 8 + $i * 12 + 4, 4));
$atomstructure['edit_list'][$i]['media_rate'] = BigEndian2Int(substr($atomdata, 8 + $i * 12 + 8, 4));
}
break;
case 'kmat':
// compressed MATte atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
// hardcoded: 0x000
$atomstructure['matte_data_raw'] = substr($atomdata, 4);
break;
case 'ctab':
// Color TABle atom
$atomstructure['color_table_seed'] = BigEndian2Int(substr($atomdata, 0, 4));
// hardcoded: 0x00000000
$atomstructure['color_table_flags'] = BigEndian2Int(substr($atomdata, 4, 2));
// hardcoded: 0x8000
$atomstructure['color_table_size'] = BigEndian2Int(substr($atomdata, 6, 2)) + 1;
for ($colortableentry = 0; $colortableentry < $atomstructure['color_table_size']; $colortableentry++) {
$atomstructure['color_table'][$colortableentry]['alpha'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 0, 2));
$atomstructure['color_table'][$colortableentry]['red'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 2, 2));
$atomstructure['color_table'][$colortableentry]['green'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 4, 2));
$atomstructure['color_table'][$colortableentry]['blue'] = BigEndian2Int(substr($atomdata, 8 + $colortableentry * 8 + 6, 2));
}
break;
case 'mvhd':
// MoVie HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['creation_time'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['modify_time'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['time_scale'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['duration'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['preferred_rate'] = FixedPoint16_16(substr($atomdata, 20, 4));
$atomstructure['preferred_volume'] = FixedPoint8_8(substr($atomdata, 24, 2));
$atomstructure['reserved'] = substr($atomdata, 26, 10);
$atomstructure['matrix_a'] = FixedPoint16_16(substr($atomdata, 36, 4));
$atomstructure['matrix_b'] = FixedPoint16_16(substr($atomdata, 40, 4));
$atomstructure['matrix_u'] = FixedPoint16_16(substr($atomdata, 44, 4));
$atomstructure['matrix_c'] = FixedPoint16_16(substr($atomdata, 48, 4));
$atomstructure['matrix_v'] = FixedPoint16_16(substr($atomdata, 52, 4));
$atomstructure['matrix_d'] = FixedPoint16_16(substr($atomdata, 56, 4));
$atomstructure['matrix_x'] = FixedPoint2_30(substr($atomdata, 60, 4));
$atomstructure['matrix_y'] = FixedPoint2_30(substr($atomdata, 64, 4));
$atomstructure['matrix_w'] = FixedPoint2_30(substr($atomdata, 68, 4));
$atomstructure['preview_time'] = BigEndian2Int(substr($atomdata, 72, 4));
$atomstructure['preview_duration'] = BigEndian2Int(substr($atomdata, 76, 4));
$atomstructure['poster_time'] = BigEndian2Int(substr($atomdata, 80, 4));
$atomstructure['selection_time'] = BigEndian2Int(substr($atomdata, 84, 4));
$atomstructure['selection_duration'] = BigEndian2Int(substr($atomdata, 88, 4));
$atomstructure['current_time'] = BigEndian2Int(substr($atomdata, 92, 4));
$atomstructure['next_track_id'] = BigEndian2Int(substr($atomdata, 96, 4));
if ($atomstructure['time_scale'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt Quicktime file: mvhd.time_scale == zero';
return false;
}
$atomstructure['creation_time_unix'] = DateMac2Unix($atomstructure['creation_time']);
$atomstructure['modify_time_unix'] = DateMac2Unix($atomstructure['modify_time']);
$ThisFileInfo['quicktime']['time_scale'] = $atomstructure['time_scale'];
$ThisFileInfo['playtime_seconds'] = $atomstructure['duration'] / $atomstructure['time_scale'];
break;
case 'tkhd':
// TracK HeaDer atom
$atomstructure['version'] = BigEndian2Int(substr($atomdata, 0, 1));
$atomstructure['flags_raw'] = BigEndian2Int(substr($atomdata, 1, 3));
$atomstructure['creation_time'] = BigEndian2Int(substr($atomdata, 4, 4));
$atomstructure['modify_time'] = BigEndian2Int(substr($atomdata, 8, 4));
$atomstructure['trackid'] = BigEndian2Int(substr($atomdata, 12, 4));
$atomstructure['reserved1'] = BigEndian2Int(substr($atomdata, 16, 4));
$atomstructure['duration'] = BigEndian2Int(substr($atomdata, 20, 4));
$atomstructure['reserved2'] = BigEndian2Int(substr($atomdata, 24, 8));
$atomstructure['layer'] = BigEndian2Int(substr($atomdata, 32, 2));
$atomstructure['alternate_group'] = BigEndian2Int(substr($atomdata, 34, 2));
$atomstructure['volume'] = FixedPoint8_8(substr($atomdata, 36, 2));
$atomstructure['reserved3'] = BigEndian2Int(substr($atomdata, 38, 2));
$atomstructure['matrix_a'] = FixedPoint16_16(substr($atomdata, 40, 4));
$atomstructure['matrix_b'] = FixedPoint16_16(substr($atomdata, 44, 4));
$atomstructure['matrix_u'] = FixedPoint16_16(substr($atomdata, 48, 4));
$atomstructure['matrix_c'] = FixedPoint16_16(substr($atomdata, 52, 4));
$atomstructure['matrix_v'] = FixedPoint16_16(substr($atomdata, 56, 4));
$atomstructure['matrix_d'] = FixedPoint16_16(substr($atomdata, 60, 4));
$atomstructure['matrix_x'] = FixedPoint2_30(substr($atomdata, 64, 4));
$atomstructure['matrix_y'] = FixedPoint2_30(substr($atomdata, 68, 4));
$atomstructure['matrix_w'] = FixedPoint2_30(substr($atomdata, 72, 4));
$atomstructure['width'] = FixedPoint16_16(substr($atomdata, 76, 4));
$atomstructure['height'] = FixedPoint16_16(substr($atomdata, 80, 4));
$atomstructure['flags']['enabled'] = (bool) ($atomstructure['flags_raw'] & 0x1);
$atomstructure['flags']['in_movie'] = (bool) ($atomstructure['flags_raw'] & 0x2);
$atomstructure['flags']['in_preview'] = (bool) ($atomstructure['flags_raw'] & 0x4);
$atomstructure['flags']['in_poster'] = (bool) ($atomstructure['flags_raw'] & 0x8);
$atomstructure['creation_time_unix'] = DateMac2Unix($atomstructure['creation_time']);
$atomstructure['modify_time_unix'] = DateMac2Unix($atomstructure['modify_time']);
if (!isset($ThisFileInfo['video']['resolution_x']) || !isset($ThisFileInfo['video']['resolution_y'])) {
$ThisFileInfo['video']['resolution_x'] = $atomstructure['width'];
$ThisFileInfo['video']['resolution_y'] = $atomstructure['height'];
}
$ThisFileInfo['video']['resolution_x'] = max($ThisFileInfo['video']['resolution_x'], $atomstructure['width']);
$ThisFileInfo['video']['resolution_y'] = max($ThisFileInfo['video']['resolution_y'], $atomstructure['height']);
if (!empty($ThisFileInfo['video']['resolution_x']) && !empty($ThisFileInfo['video']['resolution_y'])) {
$ThisFileInfo['quicktime']['video']['resolution_x'] = $ThisFileInfo['video']['resolution_x'];
$ThisFileInfo['quicktime']['video']['resolution_y'] = $ThisFileInfo['video']['resolution_y'];
} else {
unset($ThisFileInfo['video']['resolution_x']);
unset($ThisFileInfo['video']['resolution_y']);
unset($ThisFileInfo['quicktime']['video']);
}
break;
case 'mdat':
// Media DATa atom
// Media DATa atom
case 'free':
// FREE space atom
// FREE space atom
case 'skip':
// SKIP atom
// SKIP atom
case 'wide':
// 64-bit expansion placeholder atom
// 'mdat' data is too big to deal with, contains no useful metadata
// 'free', 'skip' and 'wide' are just padding, contains no useful data at all
// When writing QuickTime files, it is sometimes necessary to update an atom's size.
// It is impossible to update a 32-bit atom to a 64-bit atom since the 32-bit atom
// is only 8 bytes in size, and the 64-bit atom requires 16 bytes. Therefore, QuickTime
// puts an 8-byte placeholder atom before any atoms it may have to update the size of.
// In this way, if the atom needs to be converted from a 32-bit to a 64-bit atom, the
// placeholder atom can be overwritten to obtain the necessary 8 extra bytes.
// The placeholder atom has a type of kWideAtomPlaceholderType ( 'wide' ).
break;
default:
$ThisFileInfo['warning'] .= "\n" . 'Unknown QuickTime atom type: "' . $atomname . '" at offset ' . $baseoffset;
$atomstructure['data'] = $atomdata;
break;
}
array_pop($atomHierarchy);
return $atomstructure;
}
function FLACparseSEEKTABLE($METAdataBlockData, &$ThisFileInfo)
{
$offset = 0;
$METAdataBlockLength = strlen($METAdataBlockData);
$placeholderpattern = str_repeat(chr(0xff), 8);
while ($offset < $METAdataBlockLength) {
$SampleNumberString = substr($METAdataBlockData, $offset, 8);
$offset += 8;
if ($SampleNumberString == $placeholderpattern) {
// placeholder point
safe_inc($ThisFileInfo['flac']['SEEKTABLE']['placeholders']);
$offset += 10;
} else {
$SampleNumber = BigEndian2Int($SampleNumberString);
$ThisFileInfo['flac']['SEEKTABLE'][$SampleNumber]['offset'] = BigEndian2Int(substr($METAdataBlockData, $offset, 8));
$offset += 8;
$ThisFileInfo['flac']['SEEKTABLE'][$SampleNumber]['samples'] = BigEndian2Int(substr($METAdataBlockData, $offset, 2));
$offset += 2;
}
}
return true;
}