getid3_quicktime::quicktime_read_mp4_descr_length() –

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Description

Usage

$int = getid3_quicktime::quicktime_read_mp4_descr_length( $data, $offset );

Parameters

$data
( string ) required –
$offset
( int ) required –

Returns

int

Source

File name: wordpress/wp-includes/ID3/module.audio-video.quicktime.php
Lines:

1 to 10 of 10
  public function quicktime_read_mp4_descr_length($data, &$offset) {
    // http://libquicktime.sourcearchive.com/documentation/2:1.0.2plus-pdebian-2build1/esds_8c-source.html
    $num_bytes = 0;
    $length    = 0;
    do {
      $b = ord(substr($data, $offset++, 1));
      $length = ($length << 7) | ($b & 0x7F);
    } while (($b & 0x80) && ($num_bytes++ < 4));
    return $length;
  }
 

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