GetId3\Module\Audio\Dss Class Reference

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

Inheritance diagram for GetId3\Module\Audio\Dss:

Collaboration diagram for GetId3\Module\Audio\Dss:

Public Member Functions
	analyze ()
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)

Static Protected Member Functions
static	DSSdateStringToUnixDate ($datestring)

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 Digital Speech Standard (DSS) 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 Dss.php.

Member Function Documentation

analyze()

GetId3\Module\Audio\Dss::analyze

(

)

Returns

boolean

Definition at line 35 of file Dss.php.

References $info, array, GetId3\Handler\BaseHandler\fread(), GetId3\Handler\BaseHandler\fseek(), and GetId3\Lib\Helper\PrintHexBytes().

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

        fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
        $DSSheader  = fread($this->getid3->fp, 1256);

        if (!preg_match('#^(\x02|\x03)dss#', $DSSheader)) {
            $info['error'][] = 'Expecting "[02-03] 64 73 73" at offset '.$info['avdataoffset'].', found "'.Helper::PrintHexBytes(substr($DSSheader, 0, 4)).'"';

            return false;
        }

        // some structure information taken from http://cpansearch.perl.org/src/RGIBSON/Audio-DSS-0.02/lib/Audio/DSS.pm

        // shortcut
        $info['dss'] = array();
        $thisfile_dss        = &$info['dss'];

        $info['fileformat']            = 'dss';
        $info['audio']['dataformat']   = 'dss';
        $info['audio']['bitrate_mode'] = 'cbr';
        //$thisfile_dss['encoding']              = 'ISO-8859-1';

        $thisfile_dss['version']        =                            ord(substr($DSSheader,   0,   1));
        $thisfile_dss['date_create']    = self::DSSdateStringToUnixDate(substr($DSSheader,  38,  12));
        $thisfile_dss['date_complete']  = self::DSSdateStringToUnixDate(substr($DSSheader,  50,  12));
        //$thisfile_dss['length']         =                         intval(substr($DSSheader,  62,   6)); // I thought time was in seconds, it's actually HHMMSS
        $thisfile_dss['length']         = intval((substr($DSSheader,  62, 2) * 3600) + (substr($DSSheader,  64, 2) * 60) + substr($DSSheader,  66, 2));
        $thisfile_dss['priority']       =                            ord(substr($DSSheader, 793,   1));
        $thisfile_dss['comments']       =                           trim(substr($DSSheader, 798, 100));


        //$info['audio']['bits_per_sample']  = ?;
        //$info['audio']['sample_rate']      = ?;
        $info['audio']['channels']     = 1;

        $info['playtime_seconds'] = $thisfile_dss['length'];
        $info['audio']['bitrate'] = ($info['filesize'] * 8) / $info['playtime_seconds'];

        return true;
    }

Here is the call graph for this function:

DSSdateStringToUnixDate()

static GetId3\Module\Audio\Dss::DSSdateStringToUnixDate (   $datestring )

staticprotected

Parameters

type

$datestring

Returns

type

Definition at line 83 of file Dss.php.

References $d, $h, and $y.

    {
        $y = substr($datestring,  0, 2);
        $m = substr($datestring,  2, 2);
        $d = substr($datestring,  4, 2);
        $h = substr($datestring,  6, 2);
        $i = substr($datestring,  8, 2);
        $s = substr($datestring, 10, 2);
        $y += (($y < 95) ? 2000 : 1900);

        return mktime($h, $i, $s, $m, $d, $y);
    }

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

• libs/composer/vendor/phansys/getid3/GetId3/Module/Audio/Dss.php