ebe67fdf7f
git-svn-id: http://php-reader.googlecode.com/svn/branches/zend@168 51a70ab9-7547-0410-9469-37e369ee0574
135 lines
4.4 KiB
PHP
135 lines
4.4 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Media
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* @subpackage ASF
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**#@+ @ignore */
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require_once 'Zend/Media/Asf/Object.php';
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/**#@-*/
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/**
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* The <i>Stream Bitrate Properties Object</i> defines the average bit rate of
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* each digital media stream.
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*
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* @category Zend
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* @package Zend_Media
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* @subpackage ASF
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* @author Sven Vollbehr <sven@vollbehr.eu>
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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final class Zend_Media_Asf_Object_StreamBitrateProperties
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extends Zend_Media_Asf_Object
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{
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/** @var Array */
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private $_bitrateRecords = array();
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/**
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* Constructs the class with given parameters and reads object related data
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* from the ASF file.
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*
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* @param Zend_Io_Reader $reader The reader object.
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* @param Array $options The options array.
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*/
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public function __construct($reader = null, &$options = array())
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{
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parent::__construct($reader, $options);
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if ($reader === null) {
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return;
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}
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$bitrateRecordsCount = $this->_reader->readUInt16LE();
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for ($i = 0; $i < $bitrateRecordsCount; $i++) {
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$this->_bitrateRecords[] = array
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('streamNumber' =>
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($tmp = $this->_reader->readInt16LE()) & 0x1f,
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'flags' => $tmp >> 5,
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'averageBitrate' => $this->_reader->readUInt32LE());
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}
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}
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/**
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* Returns an array of bitrate records. Each record consists of the
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* following keys.
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*
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* o streamNumber -- Specifies the number of this stream described by this
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* record. 0 is an invalid stream. Valid values are between 1 and 127.
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*
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* o flags -- These bits are reserved and should be set to 0.
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*
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* o averageBitrate -- Specifies the average bit rate of the stream in
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* bits per second. This value should include an estimate of ASF packet
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* and payload overhead associated with this stream.
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*
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* @return Array
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*/
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public function getBitrateRecords()
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{
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return $this->_bitrateRecords;
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}
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/**
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* Sets an array of bitrate records. Each record consists of the following
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* keys.
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*
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* o streamNumber -- Specifies the number of this stream described by this
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* record. 0 is an invalid stream. Valid values are between 1 and 127.
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*
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* o flags -- These bits are reserved and should be set to 0.
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*
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* o averageBitrate -- Specifies the average bit rate of the stream in bits
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* per second. This value should include an estimate of ASF packet and
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* payload overhead associated with this stream.
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*
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* @param Array $bitrateRecords The array of bitrate records.
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*/
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public function setBitrateRecords($bitrateRecords)
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{
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$this->_bitrateRecords = $bitrateRecords;
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}
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/**
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* Writes the object data.
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*
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* @param Zend_Io_Writer $writer The writer object.
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* @return void
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*/
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public function write($writer)
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{
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$bitrateRecordsCount = count($this->_bitrateRecords);
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$this->setSize
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(24 /* for header */ + 2 + $bitrateRecordsCount * 6);
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$writer->writeGuid($this->getIdentifier())
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->writeInt64LE($this->getSize())
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->writeUInt16LE($bitrateRecordsCount);
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for ($i = 0; $i < $bitrateRecordsCount; $i++) {
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$writer->writeUInt16LE
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(($this->_bitrateRecords[$i]['flags'] << 5) |
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($this->_bitrateRecords[$i]['streamNumber'] & 0x1f))
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->writeUInt32LE
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($this->_bitrateRecords[$i]['averageBitrate']);
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}
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}
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}
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