9a83f77ef2
git-svn-id: http://php-reader.googlecode.com/svn/branches/zend@163 51a70ab9-7547-0410-9469-37e369ee0574
135 lines
4.8 KiB
PHP
135 lines
4.8 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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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @category Zend
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* @package Zend_Media
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* @subpackage ISO 14496
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* @copyright Copyright (c) 2005-2009 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/Iso14496/FullBox.php';
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/**#@-*/
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/**
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* The <i>Chunk Offset Box</i> table gives the index of each chunk into the
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* containing file. There are two variants, permitting the use of 32-bit or
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* 64-bit offsets. The latter is useful when managing very large presentations.
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* At most one of these variants will occur in any single instance of a sample
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* table.
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*
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* Offsets are file offsets, not the offset into any box within the file (e.g.
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* {@link Zend_Media_Iso14496_Box_Mdat Media Data Box}). This permits referring
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* to media data in files without any box structure. It does also mean that care
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* must be taken when constructing a self-contained ISO file with its metadata
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* ({@link Zend_Media_Iso14496_Box_Moov Movie Box}) at the front, as the size of
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* the {@link Zend_Media_Iso14496_Box_Moov Movie Box} will affect the chunk
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* offsets to the media data.
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*
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* This box variant contains 32-bit offsets.
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*
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* @category Zend
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* @package Zend_Media
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* @subpackage ISO 14496
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* @author Sven Vollbehr <sven@vollbehr.eu>
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* @copyright Copyright (c) 2005-2009 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_Iso14496_Box_Stco extends Zend_Media_Iso14496_FullBox
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{
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/** @var Array */
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private $_chunkOffsetTable = array();
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/**
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* Constructs the class with given parameters and reads box related data
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* from the ISO Base Media 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, &$options = array())
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{
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parent::__construct($reader, $options);
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$entryCount = $this->_reader->readUInt32BE();
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for ($i = 1; $i <= $entryCount; $i++) {
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$this->_chunkOffsetTable[$i] = $reader->readUInt32BE();
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}
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}
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/**
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* Returns an array of values. Each entry has the entry number as its index
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* and a 32 bit integer that gives the offset of the start of a chunk into
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* its containing media file as its value.
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*
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* @return Array
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*/
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public function getChunkOffsetTable()
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{
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return $this->_chunkOffsetTable;
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}
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/**
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* Sets an array of chunk offsets. Each entry must have the entry number as
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* its index and a 32 bit integer that gives the offset of the start of a
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* chunk into its containing media file as its value.
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*
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* @param Array $chunkOffsetTable The chunk offset array.
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*/
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public function setChunkOffsetTable($chunkOffsetTable)
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{
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$this->_chunkOffsetTable = $chunkOffsetTable;
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}
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/**
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* Returns the box heap size in bytes.
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*
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* @return integer
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*/
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public function getHeapSize()
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{
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return parent::getHeapSize() + 4 + count($this->_chunkOffsetTable) * 4;
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}
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/**
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* Writes the box data.
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*
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* @param Zend_Io_Writer $writer The writer object.
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* @return void
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*/
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protected function _writeData($writer)
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{
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parent::_writeData($writer);
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$writer->writeUInt32BE($entryCount = count($this->_chunkOffsetTable));
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for ($i = 1; $i <= $entryCount; $i++) {
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$writer->writeUInt32BE($this->_chunkOffsetTable[$i]);
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}
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}
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}
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