/** * Finds and returns the previous start code. Start codes are reserved bit * patterns in the video file that do not otherwise occur in the video * stream. * * All start codes are byte aligned and start with the following byte * sequence: 0x00 0x00 0x01. * * @return integer */ protected final function prevStartCode() { $buffer = ' '; $start; $position = $this->_reader->getOffset(); while ($position > 0) { $start = 0; $position = $position - 512; if ($position < 0) { require_once 'Zend/Media/Mpeg/Exception.php'; throw new Zend_Media_Mpeg_Exception('Invalid data'); } $this->_reader->setOffset($position); $buffer = $this->_reader->read(512) . substr($buffer, 0, 4); $pos = 512 - 8; while ($pos > 3) { list(, $int) = unpack('n*', substr($buffer, $pos + 1, 2)); if (ord($buffer[$pos]) == 0 && $int == 1) { list(, $int) = unpack('n*', substr($buffer, $pos + 3, 2)); if ($pos + 2 < 512 && $int == 0 && ord($buffer[$pos + 5]) == 1) { $pos--; continue; } $this->_reader->setOffset($position + $pos); return ord($buffer[$pos + 3]) & 0xff | 0x100; } $pos--; } $this->_reader->setOffset($position = $position + 3); } return 0; }
/** * Constructs the class with given parameters and options. * * @param Reader $reader The reader object. * @param Array $options The options array. */ public function __construct($reader, &$options = array()) { $this->_reader = $reader; $this->_options = $options; $this->_offset = $this->_reader->getOffset(); $this->_id = $this->_reader->readGUID(); $this->_size = $this->_reader->readInt64LE(); }
/** * Returns the next ASF object or <var>false</var> if end of stream has been * reached. Returned objects are of the type ASF_Object or of any of its child * types. * * @todo Only the ASF_Header_Object top level object is regognized. * @return ASF_Object */ public function nextObject() { $object = false; if ($this->hasObjects()) { $guid = $this->_reader->readGUID(); $size = $this->_reader->readInt64LE(); $offset = $this->_reader->getOffset(); switch ($guid) { case "75b22630-668e-11cf-a6d9-00aa0062ce6c": /* ASF_Header_Object */ $object = new ASF_HeaderObject($this->_reader, $guid, $size); break; default: $object = new ASF_Object($this->_reader, $guid, $size); } $this->_reader->setOffset($offset - 24 + $size); } return $object; }
/** * Reads and constructs the boxes found within this box. * * @todo Does not parse iTunes internal ---- boxes. */ protected function constructBoxes($defaultclassname = "ISO14496_Box") { $base = $this->getOption("base", ""); if ($this->getType() != "file") self::$_path[] = $this->getType(); $path = implode(self::$_path, "."); while (true) { $offset = $this->_reader->getOffset(); if ($offset >= $this->_offset + $this->_size) break; $size = $this->_reader->readUInt32BE(); $type = rtrim($this->_reader->read(4), " "); if ($size == 1) $size = $this->_reader->readInt64BE(); if ($size == 0) $size = $this->_reader->getSize() - $offset; if (preg_match("/^\xa9?[a-z0-9]{3,4}$/i", $type) && substr($base, 0, min(strlen($base), strlen ($tmp = $path . ($path ? "." : "") . $type))) == substr($tmp, 0, min(strlen($base), strlen($tmp)))) { $this->_reader->setOffset($offset); if (@fopen($filename = "ISO14496/Box/" . strtoupper($type) . ".php", "r", true) !== false) require_once($filename); if (class_exists($classname = "ISO14496_Box_" . strtoupper($type))) $box = new $classname($this->_reader, $this->_options); else $box = new $defaultclassname($this->_reader, $this->_options); $box->setParent($this); if (!isset($this->_boxes[$box->getType()])) $this->_boxes[$box->getType()] = array(); $this->_boxes[$box->getType()][] = $box; } $this->_reader->setOffset($offset + $size); } array_pop(self::$_path); }
/** * Reads and constructs the boxes found within this box. * * @todo Does not parse iTunes internal ---- boxes. */ protected final function constructBoxes($defaultclassname = 'Zend_Media_Iso14496_Box') { $base = $this->getOption('base', ''); if ($this->getType() != 'file') { self::$_path[] = $this->getType(); } $path = implode(self::$_path, '.'); while (true) { $offset = $this->_reader->getOffset(); if ($offset >= $this->_offset + $this->_size) { break; } $size = $this->_reader->readUInt32BE(); $type = rtrim($this->_reader->read(4), ' '); if ($size == 1) { $size = $this->_reader->readInt64BE(); } if ($size == 0) { $size = $this->_reader->getSize() - $offset; } if (preg_match("/^©?[a-z0-9]{3,4}\$/i", $type) && substr($base, 0, min(strlen($base), strlen($tmp = $path . ($path ? '.' : '') . $type))) == substr($tmp, 0, min(strlen($base), strlen($tmp)))) { $this->_reader->setOffset($offset); if (@fopen($filename = 'Zend/Media/Iso14496/Box/' . ucfirst($type) . '.php', 'r', true) !== false) { require_once $filename; } if (class_exists($classname = 'Zend_Media_Iso14496_Box_' . ucfirst($type))) { $box = new $classname($this->_reader, $this->_options); } else { $box = new $defaultclassname($this->_reader, $this->_options); } $box->setParent($this); if (!isset($this->_boxes[$box->getType()])) { $this->_boxes[$box->getType()] = array(); } $this->_boxes[$box->getType()][] = $box; } $this->_reader->setOffset($offset + $size); } array_pop(self::$_path); }
/** * Constructs the ID3v2 class with given file and options. The options array * may also be given as the only parameter. * * The following options are currently recognized: * o version -- The ID3v2 tag version to use in write operation. This option * is automatically set when a tag is read from a file and defaults to * version 4.0 for tag write. * * @todo Only limited subset of flags are processed. * @todo Utilize the SEEK frame and search for a footer to find the tag * @todo Utilize the LINK frame to fetch frames from other sources * @param string $filename The path to the file. * @param Array $options The options array. */ public function __construct($filename = false, $options = array()) { if (is_array($filename)) { $options = $filename; $filename = false; } $this->_options =& $options; if (($this->_filename = $filename) === false || file_exists($filename) === false) { $this->_header = new ID3_Header(null, $options); } else { $this->_reader = new Reader($filename); if ($this->_reader->readString8(3) != "ID3") { throw new ID3_Exception("File does not contain ID3v2 tag: " . $filename); } $this->_header = new ID3_Header($this->_reader, $options); if ($this->_header->getVersion() < 3 || $this->_header->getVersion() > 4) { throw new ID3_Exception("File does not contain ID3v2 tag of supported version: " . $filename); } if ($this->_header->hasFlag(ID3_Header::EXTENDEDHEADER)) { $this->_extendedHeader = new ID3_ExtendedHeader($this->_reader, $options); } if ($this->_header->hasFlag(ID3_Header::FOOTER)) { $this->_footer =& $this->_header; } // skip footer, and rather copy header while (true) { $offset = $this->_reader->getOffset(); // Jump off the loop if we reached the end of the tag if ($offset - 10 >= $this->_header->getSize() - ($this->hasFooter() ? 10 : 0)) { break; } // Jump off the loop if we reached the last frame if ($this->_reader->available() < 4 || Transform::fromUInt32BE($identifier = $this->_reader->read(4)) == 0) { break; } $this->_reader->setOffset($offset); if (@fopen($filename = "ID3/Frame/" . strtoupper($identifier) . ".php", "r", true) !== false) { require_once $filename; } if (class_exists($classname = "ID3_Frame_" . $identifier)) { $frame = new $classname($this->_reader, $options); } else { $frame = new ID3_Frame($this->_reader, $options); } if (!isset($this->_frames[$frame->getIdentifier()])) { $this->_frames[$frame->getIdentifier()] = array(); } $this->_frames[$frame->getIdentifier()][] = $frame; } } }
/** * Constructs the ID3v2 class with given file and options. The options array * may also be given as the only parameter. * * The following options are currently recognized: * o version -- The ID3v2 tag version to use in write operation. This option * is automatically set when a tag is read from a file and defaults to * version 4.0 for tag write. * o readonly -- Indicates that the tag is read from a temporary file or * another source it cannot be written back to. The tag can, however, * still be written to another file. * * @todo Only limited subset of flags are processed. * @todo Utilize the SEEK frame and search for a footer to find the tag * @todo Utilize the LINK frame to fetch frames from other sources * @param string|Reader $filename The path to the file, file descriptor of an * opened file, or {@link Reader} instance. * @param Array $options The options array. */ public function __construct($filename = false, $options = array()) { if (is_array($filename)) { $options = $filename; $filename = false; } $this->_options = &$options; if ($filename === false || (is_string($filename) && file_exists($filename) === false) || (is_resource($filename) && in_array(get_resource_type($filename), array("file", "stream")))) { $this->_header = new ID3_Header(null, $options); } else { if (is_string($filename) && !isset($options["readonly"])) $this->_filename = $filename; if ($filename instanceof Reader) $this->_reader = &$filename; else $this->_reader = new Reader($filename); if ($this->_reader->readString8(3) != "ID3") throw new ID3_Exception("File does not contain ID3v2 tag"); $startOffset = $this->_reader->getOffset(); $this->_header = new ID3_Header($this->_reader, $options); if ($this->_header->getVersion() < 3 || $this->_header->getVersion() > 4) throw new ID3_Exception ("File does not contain ID3v2 tag of supported version"); if ($this->_header->getVersion() < 4 && $this->_header->hasFlag(ID3_Header::UNSYNCHRONISATION)) throw new ID3_Exception ("Unsynchronisation not supported for this version of ID3v2 tag"); unset($this->_options["unsyncronisation"]); if ($this->_header->hasFlag(ID3_Header::UNSYNCHRONISATION)) $this->_options["unsyncronisation"] = true; if ($this->_header->hasFlag(ID3_Header::EXTENDEDHEADER)) $this->_extendedHeader = new ID3_ExtendedHeader($this->_reader, $options); if ($this->_header->hasFlag(ID3_Header::FOOTER)) $this->_footer = &$this->_header; // skip footer, and rather copy header while (true) { $offset = $this->_reader->getOffset(); // Jump off the loop if we reached the end of the tag if ($offset - $startOffset - 10 >= $this->_header->getSize() - ($this->hasFooter() ? 10 : 0)) break; // Jump off the loop if we reached the last frame if ($this->_reader->available() < 4 || Transform::fromUInt32BE ($identifier = $this->_reader->read(4)) == 0) break; $this->_reader->setOffset($offset); if (@fopen($filename = "ID3/Frame/" . strtoupper($identifier) . ".php", "r", true) !== false) require_once($filename); if (class_exists($classname = "ID3_Frame_" . $identifier)) $frame = new $classname($this->_reader, $options); else $frame = new ID3_Frame($this->_reader, $options); if (!isset($this->_frames[$frame->getIdentifier()])) $this->_frames[$frame->getIdentifier()] = array(); $this->_frames[$frame->getIdentifier()][] = $frame; } } }