name : module.audio-video.ts.php <?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio-video.ts.php // // module for analyzing MPEG Transport Stream (.ts) files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_ts extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $this->fseek($info['avdataoffset']); $TSheader = $this->fread(19); $magic = "\x47"; if (substr($TSheader, 0, 1) != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at '.$info['avdataoffset'].', found '.getid3_lib::PrintHexBytes(substr($TSheader, 0, 1)).' instead.'); return false; } $info['fileformat'] = 'ts'; // http://en.wikipedia.org/wiki/.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); // Set by demodulator if can't correct errors in the stream, to tell the demultiplexer that the packet has an uncorrectable error $info['ts']['packet']['flags']['payload_unit_start_indicator'] = (bool) ($pid_flags_raw & 0x4000); // 1 means start of PES data or PSI otherwise zero only. $info['ts']['packet']['flags']['transport_high_priority'] = (bool) ($pid_flags_raw & 0x2000); // 1 means higher priority than other packets with the same PID. $info['ts']['packet']['packet_id'] = ($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; // Incremented only when a payload is present $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; // Number of bytes in the adaptation field immediately following this byte $info['ts']['packet']['adaption']['flags']['discontinuity'] = (bool) ($AdaptionField_raw & 0x0080); // Set to 1 if current TS packet is in a discontinuity state with respect to either the continuity counter or the program clock reference $info['ts']['packet']['adaption']['flags']['random_access'] = (bool) ($AdaptionField_raw & 0x0040); // Set to 1 if the PES packet in this TS packet starts a video/audio sequence $info['ts']['packet']['adaption']['flags']['high_priority'] = (bool) ($AdaptionField_raw & 0x0020); // 1 = higher priority $info['ts']['packet']['adaption']['flags']['pcr'] = (bool) ($AdaptionField_raw & 0x0010); // 1 means adaptation field does contain a PCR field $info['ts']['packet']['adaption']['flags']['opcr'] = (bool) ($AdaptionField_raw & 0x0008); // 1 means adaptation field does contain an OPCR field $info['ts']['packet']['adaption']['flags']['splice_point'] = (bool) ($AdaptionField_raw & 0x0004); // 1 means presence of splice countdown field in adaptation field $info['ts']['packet']['adaption']['flags']['private_data'] = (bool) ($AdaptionField_raw & 0x0002); // 1 means presence of private data bytes in adaptation field $info['ts']['packet']['adaption']['flags']['extension'] = (bool) ($AdaptionField_raw & 0x0001); // 1 means presence of adaptation field extension 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; } } $this->error('MPEG Transport Stream (.ts) parsing not enabled in this version of getID3() ['.$this->getid3->version().']'); return false; } /** * @param int $raw * * @return string */ public function TSscramblingControlLookup($raw) { $TSscramblingControlLookup = array(0x00=>'not scrambled', 0x01=>'reserved', 0x02=>'scrambled, even key', 0x03=>'scrambled, odd key'); return (isset($TSscramblingControlLookup[$raw]) ? $TSscramblingControlLookup[$raw] : 'invalid'); } }