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Add write support for ASF header objects

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git-svn-id: http://php-reader.googlecode.com/svn/trunk@139 51a70ab9-7547-0410-9469-37e369ee0574
This commit is contained in:
svollbehr
2009-02-19 14:10:37 +00:00
parent 1b8eed275f
commit c6c10d7ce8
32 changed files with 2981 additions and 281 deletions
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95
src/ASF.php
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@@ -2,7 +2,7 @@
/**
* PHP Reader Library
*
* Copyright (c) 2006-2008 The PHP Reader Project Workgroup. All rights
* Copyright (c) 2006-2009 The PHP Reader Project Workgroup. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
*
* @package php-reader
* @subpackage ASF
* @copyright Copyright (c) 2006-2008 The PHP Reader Project Workgroup
* @copyright Copyright (c) 2006-2009 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id$
*/
@@ -56,19 +56,12 @@ require_once("ASF/Object/Container.php");
* @package php-reader
* @subpackage ASF
* @author Sven Vollbehr <svollbehr@gmail.com>
* @copyright Copyright (c) 2006-2008 The PHP Reader Project Workgroup
* @copyright Copyright (c) 2006-2009 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Rev$
*/
class ASF extends ASF_Object_Container
{
const HEADER = "75b22630-668e-11cf-a6d9-00aa0062ce6c";
const DATA = "75b22636-668e-11cf-a6d9-00aa0062ce6c";
const SIMPLE_INDEX = "33000890-e5b1-11cf-89f4-00a0c90349cb";
const INDEX = "d6e229d3-35da-11d1-9034-00a0c90349be";
const MEDIA_OBJECT_INDEX = "feb103f8-12ad-4c64-840f-2a1d2f7ad48c";
const TIMECODE_INDEX = "3cb73fd0-0c4a-4803-953d-edf7b6228f0c";
/** @var string */
private $_filename;
@@ -140,12 +133,84 @@ class ASF extends ASF_Object_Container
/**
* Writes the changes back to the original media file.
*
* Please note: currently the method writes only Content Description and
* Extended Content Description Objects.
*/
public function write()
public function write($filename = false)
{
throw new ASF_Exception("Not yet supported");
if ($filename === false)
$filename = $this->_filename;
if ($filename !== false && $this->_filename !== false &&
realpath($filename) != realpath($this->_filename) &&
!copy($this->_filename, $filename)) {
require_once("ASF/Exception.php");
throw new ASF_Exception("Unable to copy source to destination: " .
realpath($this->_filename) . "->" . realpath($filename));
}
if (($fd = fopen
($filename, file_exists($filename) ? "r+b" : "wb")) === false) {
require_once("ASF/Exception.php");
throw new ASF_Exception("Unable to open file for writing: " . $filename);
}
$header = $this->getHeader();
$headerLengthOld = $header->getSize();
$header->removeObjectsByIdentifier(ASF_Object::PADDING);
$header->headerExtension->removeObjectsByIdentifier(ASF_Object::PADDING);
$headerData = $header->__toString();
$headerLengthNew = $header->getSize();
// Fits right in
if ($headerLengthOld == $headerLengthNew) {
}
// Fits with adjusted padding
else if ($headerLengthOld >= $headerLengthNew + 24 /* for header */) {
$header->headerExtension->padding->setSize
($headerLengthOld - $headerLengthNew);
$headerData = $header->__toString();
$headerLengthNew = $header->getSize();
}
// Must expand
else {
$header->headerExtension->padding->setSize(4096);
$headerData = $header->__toString();
$headerLengthNew = $header->getSize();
fseek($fd, 0, SEEK_END);
$oldFileSize = ftell($fd);
ftruncate
($fd, $newFileSize = $headerLengthNew - $headerLengthOld +
$oldFileSize);
for ($i = 1, $cur = $oldFileSize; $cur > 0; $cur -= 1024, $i++) {
fseek($fd, -(($i * 1024) + ($newFileSize - $oldFileSize)), SEEK_END);
$buffer = fread($fd, 1024);
fseek($fd, -($i * 1024), SEEK_END);
fwrite($fd, $buffer, 1024);
}
}
fseek($fd, 0);
fwrite($fd, $headerData, $headerLengthNew);
fclose($fd);
$this->_filename = $filename;
}
/**
* Returns the whether the object is required to be present, or whether
* minimum cardinality is 1.
*
* @return boolean
*/
public function isMandatory() { return true; }
/**
* Returns whether multiple instances of this object can be present, or
* whether maximum cardinality is greater than 1.
*
* @return boolean
*/
public function isMultiple() { return false; }
}