GetId3\Module\AudioVideo\Ts Class Reference

GetId3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //. More...

Inheritance diagram for GetId3\Module\AudioVideo\Ts:

Collaboration diagram for GetId3\Module\AudioVideo\Ts:

Public Member Functions
	analyze ()
	TSscramblingControlLookup ($raw)
Public Member Functions inherited from GetId3\Handler\BaseHandler
	__construct (GetId3Core $getid3, $call_module=null)
	analyze ()
	Analyze from file pointer. More...
	AnalyzeString (&$string)
	Analyze from string instead. More...
	saveAttachment (&$ThisFileInfoIndex, $filename, $offset, $length)

Additional Inherited Members
Protected Member Functions inherited from GetId3\Handler\BaseHandler
	ftell ()
	fread ($bytes)
	fseek ($bytes, $whence=SEEK_SET)
	feof ()
	isDependencyFor ($module)
	error ($text)
	warning ($text)
Protected Attributes inherited from GetId3\Handler\BaseHandler
	$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 //.

module for analyzing MPEG Transport Stream (.ts) files

Author

James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g http://www.getid3.org

Definition at line 29 of file Ts.php.

Member Function Documentation

analyze()

GetId3\Module\AudioVideo\Ts::analyze

(

)

Returns

boolean

Definition at line 36 of file Ts.php.

References $info, GetId3\Lib\Helper\BigEndian2Int(), GetId3\Handler\BaseHandler\fread(), GetId3\Handler\BaseHandler\fseek(), GetId3\Lib\Helper\PrintHexBytes(), and GetId3\Module\AudioVideo\Ts\TSscramblingControlLookup().

    {
        $info = &$this->getid3->info;

        fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
        $TSheader = fread($this->getid3->fp, 19);
        $magic = "\x47";
        if (substr($TSheader, 0, 1) != $magic) {
            $info['error'][] = 'Expecting "'.Helper::PrintHexBytes($magic).'" at '.$info['avdataoffset'].', found '.Helper::PrintHexBytes(substr($TSheader, 0, 1)).' instead.';

            return false;
        }
        $info['fileformat'] = 'ts';

        // http://en.wikipedia.org/wiki/.ts

        $offset = 0;
        $info['ts']['packet']['sync'] = Helper::BigEndian2Int(substr($TSheader, $offset, 1)); $offset += 1;
        $pid_flags_raw                = Helper::BigEndian2Int(substr($TSheader, $offset, 2)); $offset += 2;
        $SAC_raw                      = Helper::BigEndian2Int(substr($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']) {
            $AdaptionField_raw        = Helper::BigEndian2Int(substr($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']) {
                $info['ts']['packet']['adaption']['raw']['pcr'] = Helper::BigEndian2Int(substr($TSheader, $offset, 6)); $offset += 6;
            }
            if ($info['ts']['packet']['adaption']['flags']['opcr']) {
                $info['ts']['packet']['adaption']['raw']['opcr'] = Helper::BigEndian2Int(substr($TSheader, $offset, 6)); $offset += 6;
            }
        }

        $info['error'][] = 'MPEG Transport Stream (.ts) parsing not enabled in this version of GetId3Core() ['.$this->getid3->version().']';

        return false;

    }

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TSscramblingControlLookup()

GetId3\Module\AudioVideo\Ts::TSscramblingControlLookup

(

$raw

)

Parameters

type

$raw

Returns

type

Definition at line 97 of file Ts.php.

References array.

Referenced by GetId3\Module\AudioVideo\Ts\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:

• libs/composer/vendor/phansys/getid3/GetId3/Module/AudioVideo/Ts.php