* @copyright Copyright (c) 2006-2009 Tommy Lacroix * @license LGPL version 3, http://www.gnu.org/licenses/lgpl.html * @package php-mp4info * @link $HeadURL$ * * Based on: * - http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt * - http://neuron2.net/library/avc/c041828_ISO_IEC_14496-12_2005(E).pdf * - http://www.adobe.com/devnet/flv/pdf/video_file_format_spec_v10.pdf * * Version allégée par Jean-Yves Giraud (décembre 2013) pour récupérer uniquement largeur et hauteur d'une video MP4 * */ // --- /** * MP4Info General Box * * @author Tommy Lacroix * @version 1.1.20090611 $Id$ */ class MP4Info_Box { /** * Total box size, including box header (8 bytes) * * @var int */ protected $totalSize; /** * Box type, numeric * * @var int */ protected $boxType; /** * Box type, string * * @var string */ protected $boxTypeStr; /** * Box data * * @var string(binary) */ protected $data; /** * Parent * * @var MP4Info_Box|false */ protected $parent; /** * Children * * @var MP4Info_Box[] */ protected $children = array(); /** * Constructor * * @author Tommy Lacroix * @param int $totalSize * @param int $boxType * @param file|string $f * @param MP4Info_Box $parent * @access public */ public function __construct($totalSize, $boxType, $f, &$parent=false) { $this->totalSize = $totalSize; $this->boxType = $boxType; $this->boxTypeStr = pack('N',$boxType); $this->data = self::getDataFrom3rd($f,$totalSize); $this->parent = &$parent; if ($parent != false) { $parent->addChild($this); } } // Constructor /** * Get box parent * * @author Tommy Lacroix * @return MP4Info_Box * @access public */ public function &getParent() { return $this->parent; } /** * Add a child to this box * * @author Tommy Lacroix * @param MP4Info_Box $child * @access public */ public function addChild(&$child) { if (!$child instanceof MP4Info_Box) { throw new Exception('Child is not MP4Info_Box'); } $this->children[] = &$child; } /** * Check if the box has children * * @author Tommy Lacroix * @return bool * @access public */ public function hasChildren() { return count($this->children) > 0; } // hasChildren method /** * Get boxes' children * * @author Tommy Lacroix * @return MP4Info_Box[] * @access public */ public function children() { return $this->children; } // children method /** * Get data from 3rd argument (file or string) * * @author Tommy Lacroix * @param file|string $f * @param int $totalSize * @return string * @access public * @static */ public static function getDataFrom3rd($f, $totalSize) { // Get data if ($f === false) { return ''; } else if (is_string($f)) { $data = substr($f,0,$totalSize-8); } else { $data = fread($f,$totalSize-8); } return $data; } // getDataFrom3rd method /** * Create an MP4Info_Box object from data * * @author Tommy Lacroix * @param int $totalSize * @param int $boxType * @param file|string $f * @param MP4Info_Box|false $parent * @return MP4Info_Box * @access public * @static */ public static function factory($totalSize, $boxType, $f, $parent=false) { if (MP4Info_Box_Container::isCompatible($boxType,$parent)) { $box = new MP4Info_Box_Container($totalSize, $boxType, $f, $parent); } else if (MP4Info_Box_hdlr::isCompatible($boxType,$parent)) { $box = new MP4Info_Box_hdlr($totalSize, $boxType, $f, $parent); } else if (MP4Info_Box_stsd::isCompatible($boxType,$parent)) { $box = new MP4Info_Box_stsd($totalSize, $boxType, $f, $parent); } else { // Debug... print '0x'.dechex($boxType).'-'.pack('N',$boxType); if ($parent !== false) print ' in '.$parent->getBoxTypeStr(); else print ' in root'; // $box = new MP4Info_Box($totalSize, $boxType, $f, $parent); } // Return box return $box; } // factory method /** * Create a box from string * * @author Tommy Lacroix * @param string $data * @param MP4Info_Box|false $parent * @return MP4Info_Box * @access public * @static */ public static function fromString(&$data,$parent=false) { if (strlen($data) < 8) { throw new Exception('Not enough data, need at least 8 bytes!'); } $ar = unpack('NtotalSize/NboxType',$data); if ($ar['totalSize'] == 1) { // Size is bigger than 4GB :-O die // Skip ExtendedSize(UI64) and try to decode anyway $ar2 = unpack('N2extSize',substr($data,8)); if ($ar2['extSize1'] > 0) { throw new Exception('Extended size not supported'); } else { $ar['totalSize'] = $ar2['extSize2']; } $skip = 8; } else { $skip = 0; } // Check if we need to skip if (self::skipBoxType($ar['boxType'])) { //print '+++ Skipping box '.pack('N',$ar['boxType']).'
'; $data = substr($data,$ar['totalSize']); return self::fromString($data,$parent); } // Create box $box = self::factory($ar['totalSize'],$ar['boxType'],substr($data,8+$skip),$parent); if ($box instanceof MP4Info_Box) { $data = substr($data,$box->getTotalSize()); } return $box; } // fromString method /** * Create a box from file stream * * @author Tommy Lacroix * @param file $f * @param MP4Info_Box|false $parent * @return MP4Info_Box * @access public * @static */ public static function fromStream($f,$parent=false) { // Get box header $buf = fread($f,8); if (strlen($buf) < 8) { return false; } $ar = unpack('NtotalSize/NboxType',$buf); if ($ar['totalSize'] == 1) { // Size is bigger than 4GB :-O die // Skip ExtendedSize(UI64) and try to decode anyway $buf = fread($f,8); $ar2 = unpack('N2extSize',$buf); if ($ar2['extSize1'] > 0) { throw new Exception('Extended size not supported'); } else { $ar['totalSize'] = $ar2['extSize2']; } } // Check if we need to skip if (self::skipBoxType($ar['boxType'])) { //print '+++ Skipping box '.pack('N',$ar['boxType']).'
'; fseek($f,$ar['totalSize']-8,SEEK_CUR); return self::fromStream($f,$parent); } // Get box content if ($ar['totalSize'] > 0) { if ($ar['totalSize'] < 256*1024) { if ($ar['totalSize']-8 > 0) { $data = fread($f,$ar['totalSize']-8); } else { $data = ''; } } else { $data = $f; } } else { $data = ''; } // Create box object $box = MP4Info_Box::factory($ar['totalSize'], $ar['boxType'], $data, $parent); return $box; } // fromStream method /** * Check if we need to skip a box based on type * * @param int $boxType * @return bool * @access public * @static */ public static function skipBoxType($boxType) { switch ($boxType) { case 0x696f6473: // iods 5.1 Initial Object Descriptor Box case 0x55c40000: // ??? ?? case 0x6d646174: // mdat ?? Movie Data case 0x736d6864: // smhd 8.11.3 Sound Media Header Box case 0x766d6864: // vmhd 8.11.2 Video Media Header Box case 0x6e6d6864: // nmhd 8.11.5 Null Media Header Box case 0x64696e66: // dinf ?? case 0x73747473: // stts 8.15.2 Decoding Time to Sample Box case 0x73747363: // stsc 8.18 Sample To Chunk Box case 0x7374737a: // stsz 8.17 Sample Size Boxes case 0x7374636f: // stco 8.19 Chunk Offset Box case 0x636f3634: // co64 8.19 Chunk Offset Box case 0x63747473: // ctts 8.15.3 Composition Time to Sample Box case 0x73747373: // stss 8.20 Sync Sample Box case 0x74726566: // tref 8.6 Track Reference Box case 0x65647473: // edts 8.25 Edit Box case 0x66726565: // free 8.24 Free Space Box case 0x6e64726d: // ndrm ?? Nero Digital Right Management? case 0x66747970: // ftyp case 0x6d766864: // mvhd case 0x746b6864: // tkhd case 0x6d646864: // mdhd case 0x6d657461: // meta case 0x58747261: // xtra case 0x75756964: // uuid case 0x20000: // in root return true; default: return false; } } // skipBoxType method /** * Total size getter * * @author Tommy Lacroix * @return int * @access public */ public function getTotalSize() { return $this->totalSize; } // getTotalSize method /** * Box type getter * * @author Tommy Lacroix * @return int * @access public */ public function getBoxType() { return $this->boxType; } // getBoxType method /** * Box type string getter * * @author Tommy Lacroix * @return string * @access public */ public function getBoxTypeStr() { return $this->boxTypeStr; } // getBoxTypeStr method } // MP4Info_Box class include "Container.php"; include "hdlr.php"; include "stsd.php";