diff options
Diffstat (limited to 'libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/Reader.php')
-rw-r--r-- | libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/Reader.php | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/Reader.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/Reader.php new file mode 100644 index 0000000..98678b6 --- /dev/null +++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/Reader.php @@ -0,0 +1,216 @@ +<?php +/** + * PHP Reader Library + * + * Copyright (c) 2006-2008 The PHP Reader Project Workgroup. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * - Neither the name of the project workgroup nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * @package php-reader + * @copyright Copyright (c) 2006-2008 The PHP Reader Project Workgroup + * @license http://code.google.com/p/php-reader/wiki/License New BSD License + * @version $Id: Reader.php 104 2008-07-29 21:11:46Z svollbehr $ + */ + +/**#@+ @ignore */ +require_once("Reader/Exception.php"); +require_once("Transform.php"); +/**#@-*/ + +/** + * The Reader class encapsulates a file. It is hence responsible of upkeeping + * the connection to the file, keeping track of the cursor position and reading + * data from it. + * + * @package php-reader + * @author Sven Vollbehr <svollbehr@gmail.com> + * @author Ryan Butterfield <buttza@gmail.com> + * @copyright Copyright (c) 2006-2008 The PHP Reader Project Workgroup + * @license http://code.google.com/p/php-reader/wiki/License New BSD License + * @version $Rev: 104 $ + */ +class Reader +{ + /** @var resource */ + private $_fd; + + /** @var integer */ + private $_size; + + /** + * Constructs the Reader class with given file. + * + * @param string $filename The path to the file. + * @param string $mode The type of access. + * @throws Reader_Exception if the file cannot be read. + */ + public function __construct($filename, $mode = "rb") + { + if (is_resource($filename) && + in_array(get_resource_type($filename), array("file", "stream"))) + $this->_fd = $filename; + else if (($this->_fd = fopen($filename, $mode)) === false) + throw new Reader_Exception("Unable to open file:" . $filename); + + fseek($this->_fd, 0, SEEK_END); + $this->_size = ftell($this->_fd); + fseek($this->_fd, 0); + } + + /** + * Closes the file. + */ + public function __destruct() + { + @fclose($this->_fd); + } + + /** + * Checks whether there is more to be read in the file. Returns + * <var>true</var> if the end of the file has not yet been reached; + * <var>false</var> otherwise. + * + * @return boolean + */ + public function available() + { + return $this->getOffset() < $this->_size; + } + + /** + * Jumps <var>size</var> amount of bytes in the file stream. + * + * @param integer $size The amount of bytes. + * @return void + * @throws Reader_Exception if <var>size</var> attribute is negative. + */ + public function skip($size) + { + if ($size < 0) + throw new Reader_Exception("Invalid argument"); + if ($size == 0) + return; + fseek($this->_fd, $size, SEEK_CUR); + } + + /** + * Reads <var>length</var> amount of bytes from the file stream. + * + * @param integer $length The amount of bytes. + * @return string + * @throws Reader_Exception if <var>length</var> attribute is negative. + */ + public function read($length) + { + if ($length < 0) + throw new Reader_Exception("Invalid argument"); + if ($length == 0) + return ""; + return fread($this->_fd, $length); + } + + /** + * Returns the current point of operation. + * + * @return integer + */ + public function getOffset() + { + return ftell($this->_fd); + } + + /** + * Sets the point of operation, ie the cursor offset value. The offset can + * also be set to a negative value when it is interpreted as an offset from + * the end of the file instead of the beginning. + * + * @param integer $offset The new point of operation. + * @return void + */ + public function setOffset($offset) + { + fseek($this->_fd, $offset < 0 ? $this->_size + $offset : $offset); + } + + /** + * Returns the file size in bytes. + * + * @return integer + */ + public function getSize() { return $this->_size; } + + /** + * Magic function so that $obj->value will work. + * + * @param string $name The field name. + * @return mixed + */ + public function __get($name) { + if (method_exists($this, "get" . ucfirst(strtolower($name)))) + return call_user_func(array($this, "get" . ucfirst(strtolower($name)))); + else throw new Reader_Exception("Unknown field: " . $name); + } + + /** + * Magic function so that assignments with $obj->value will work. + * + * @param string $name The field name. + * @param string $value The field value. + * @return mixed + */ + public function __set($name, $value) { + if (method_exists($this, "set" . ucfirst(strtolower($name)))) + call_user_func + (array($this, "set" . ucfirst(strtolower($name))), $value); + else throw new Reader_Exception("Unknown field: " . $name); + } + + /** + * Magic function to delegate the call to helper methods of + * <var>Transform</var> class to transform read data in another format. + * + * The read data length is determined from the helper method name. For methods + * where arbitrary data lengths are accepted a parameter can be used to + * specify the length. + * + * @param string $method The method to be called. + * @param string $params The parameters should the function accept them. + * @return mixed + * @throws Reader_Exception if no such transformer is implemented + */ + public function __call($method, $params) { + $chunks = array(); + if (preg_match + ("/read([a-z]{3,6})?(\d{1,2})?(?:LE|BE)?/i", $method, $chunks) && + method_exists("Transform", preg_replace("/^read/", "from", $method))) { + return call_user_func + (array("Transform", preg_replace("/^read/", "from", $method)), + $this->read(preg_match("/String|(?:H|L)Hex/", $chunks[1]) ? + (isset($params[0]) ? $params[0] : 1) : + ($chunks[1] == "GUID" ? 16 : $chunks[2] / 8))); + } else throw new Reader_Exception("Unknown method: " . $method); + } +} |