getid3_ts Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

Inheritance diagram for getid3_ts:

Collaboration diagram for getid3_ts:

Public Member Functions
	Analyze ()
	TSscramblingControlLookup ($raw)
Public Member Functions inherited from getid3_handler
	__construct (getID3 $getid3, $call_module=null)
	Analyze ()
	AnalyzeString ($string)
	setStringMode ($string)
	saveAttachment ($name, $offset, $length, $image_mime=null)

Additional Inherited Members
Protected Member Functions inherited from getid3_handler
	ftell ()
	fread ($bytes)
	fseek ($bytes, $whence=SEEK_SET)
	feof ()
	isDependencyFor ($module)
	error ($text)
	warning ($text)
	notice ($text)
Protected Attributes inherited from getid3_handler
	$getid3
	$data_string_flag = false
	$data_string = ''
	$data_string_position = 0
	$data_string_length = 0

Detailed Description

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //

Definition at line 18 of file module.audio-video.ts.php.

Member Function Documentation

Analyze()

getid3_ts::Analyze

(

)

Definition at line 21 of file module.audio-video.ts.php.

References $info, getid3_lib\BigEndian2Int(), getid3_handler\fread(), getid3_handler\fseek(), getid3_lib\PrintHexBytes(), and TSscramblingControlLookup().

                                  {
                $info = &$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';

                // 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;
                        }
                }

$info['error'][] = 'MPEG Transport Stream (.ts) parsing not enabled in this version of getID3() ['.$this->getid3->version().']';
return false;

        }

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TSscramblingControlLookup()

getid3_ts::TSscramblingControlLookup

(

$raw

)

Definition at line 75 of file module.audio-video.ts.php.

Referenced by Analyze().

                                                        {
                $TSscramblingControlLookup = array(0x00=>'not scrambled', 0x01=>'reserved', 0x02=>'scrambled, even key', 0x03=>'scrambled, odd key');
                return (isset($TSscramblingControlLookup[$raw]) ? $TSscramblingControlLookup[$raw] : 'invalid');
        }

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The documentation for this class was generated from the following file:

• Services/MediaObjects/lib/getID3-1.9.10/getid3/module.audio-video.ts.php