| <Website> | getID3 |  |
|
| Size: | 3401 |
| Storage flags: | strip |
<?php
class getid3_ts extends getid3_handler
{
public function Analyze() {
$info = &$this->getid3->info;
$this->fseek($info['avdataoffset']);
$TSheader = $this->fread(19);
$magic = "\x47";
if (substr($TSheader, 0, 1) != $magic) {
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at '.$info['avdataoffset'].', found '.getid3_lib::PrintHexBytes(substr($TSheader, 0, 1)).' instead.';
return false;
}
$info['fileformat'] = 'ts';
$offset = 0;
$info['ts']['packet']['sync'] = getid3_lib::BigEndian2Int(substr($TSheader, $offset, 1)); $offset += 1;
$pid_flags_raw = getid3_lib::BigEndian2Int(substr($TSheader, $offset, 2)); $offset += 2;
$SAC_raw = getid3_lib::BigEndian2Int(substr($TSheader, $offset, 1)); $offset += 1;
$info['ts']['packet']['flags']['transport_error_indicator'] = (bool) ($pid_flags_raw & 0x8000);
$info['ts']['packet']['flags']['payload_unit_start_indicator'] = (bool) ($pid_flags_raw & 0x4000);
$info['ts']['packet']['flags']['transport_high_priority'] = (bool) ($pid_flags_raw & 0x2000);
$info['ts']['packet']['packet_id'] = ($pid_flags_raw & 0x1FFF) >> 0;
$info['ts']['packet']['raw']['scrambling_control'] = ($SAC_raw & 0xC0) >> 6;
$info['ts']['packet']['flags']['adaption_field_exists'] = (bool) ($SAC_raw & 0x20);
$info['ts']['packet']['flags']['payload_exists'] = (bool) ($SAC_raw & 0x10);
$info['ts']['packet']['continuity_counter'] = ($SAC_raw & 0x0F) >> 0;
$info['ts']['packet']['scrambling_control'] = $this->TSscramblingControlLookup($info['ts']['packet']['raw']['scrambling_control']);
if ($info['ts']['packet']['flags']['adaption_field_exists']) {
$AdaptionField_raw = getid3_lib::BigEndian2Int(substr($TSheader, $offset, 2)); $offset += 2;
$info['ts']['packet']['adaption']['field_length'] = ($AdaptionField_raw & 0xFF00) >> 8;
$info['ts']['packet']['adaption']['flags']['discontinuity'] = (bool) ($AdaptionField_raw & 0x0080);
$info['ts']['packet']['adaption']['flags']['random_access'] = (bool) ($AdaptionField_raw & 0x0040);
$info['ts']['packet']['adaption']['flags']['high_priority'] = (bool) ($AdaptionField_raw & 0x0020);
$info['ts']['packet']['adaption']['flags']['pcr'] = (bool) ($AdaptionField_raw & 0x0010);
$info['ts']['packet']['adaption']['flags']['opcr'] = (bool) ($AdaptionField_raw & 0x0008);
$info['ts']['packet']['adaption']['flags']['splice_point'] = (bool) ($AdaptionField_raw & 0x0004);
$info['ts']['packet']['adaption']['flags']['private_data'] = (bool) ($AdaptionField_raw & 0x0002);
$info['ts']['packet']['adaption']['flags']['extension'] = (bool) ($AdaptionField_raw & 0x0001);
if ($info['ts']['packet']['adaption']['flags']['pcr']) {
$info['ts']['packet']['adaption']['raw']['pcr'] = getid3_lib::BigEndian2Int(substr($TSheader, $offset, 6)); $offset += 6;
}
if ($info['ts']['packet']['adaption']['flags']['opcr']) {
$info['ts']['packet']['adaption']['raw']['opcr'] = getid3_lib::BigEndian2Int(substr($TSheader, $offset, 6)); $offset += 6;
}
}
$info['error'][] = 'MPEG Transport Stream (.ts) parsing not enabled in this version of getID3() ['.$this->getid3->version().']';
return false;
}
public function TSscramblingControlLookup($raw) {
$TSscramblingControlLookup = array(0x00=>'not scrambled', 0x01=>'reserved', 0x02=>'scrambled, even key', 0x03=>'scrambled, odd key');
return (isset($TSscramblingControlLookup[$raw]) ? $TSscramblingControlLookup[$raw] : 'invalid');
}
}