/src/Zend/Media/Iso14496/Box/Co64.php
http://php-reader.googlecode.com/ · PHP · 133 lines · 33 code · 8 blank · 92 comment · 2 complexity · 2d1f7ff288586af31f70972f8fd60243 MD5 · raw file
- <?php
- /**
- * Zend Framework
- *
- * LICENSE
- *
- * This source file is subject to the new BSD license that is bundled
- * with this package in the file LICENSE.txt.
- * It is also available through the world-wide-web at this URL:
- * http://framework.zend.com/license/new-bsd
- * If you did not receive a copy of the license and are unable to
- * obtain it through the world-wide-web, please send an email
- * to license@zend.com so we can send you a copy immediately.
- *
- * 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.
- *
- * @category Zend
- * @package Zend_Media
- * @subpackage ISO14496
- * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- * @version $Id: Co64.php 177 2010-03-09 13:13:34Z svollbehr $
- */
- /**#@+ @ignore */
- require_once 'Zend/Media/Iso14496/FullBox.php';
- /**#@-*/
- /**
- * The <i>Chunk Offset Box</i> table gives the index of each chunk into the
- * containing file. There are two variants, permitting the use of 32-bit or
- * 64-bit offsets. The latter is useful when managing very large presentations.
- * At most one of these variants will occur in any single instance of a sample
- * table.
- *
- * Offsets are file offsets, not the offset into any box within the file (e.g.
- * {@link Zend_Media_Iso14496_Box_Mdat Media Data Box}). This permits referring
- * to media data in files without any box structure. It does also mean that care
- * must be taken when constructing a self-contained ISO file with its metadata
- * ({@link Zend_Media_Iso14496_Box_Moov Movie Box}) at the front, as the size of
- * the {@link Zend_Media_Iso14496_Box_Moov Movie Box} will affect the chunk
- * offsets to the media data.
- *
- * This box variant contains 64-bit offsets.
- *
- * @category Zend
- * @package Zend_Media
- * @subpackage ISO14496
- * @author Sven Vollbehr <sven@vollbehr.eu>
- * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- * @version $Id: Co64.php 177 2010-03-09 13:13:34Z svollbehr $
- */
- final class Zend_Media_Iso14496_Box_Co64 extends Zend_Media_Iso14496_FullBox
- {
- /** @var Array */
- private $_chunkOffsetTable = array();
- /**
- * Constructs the class with given parameters and reads box related data
- * from the ISO Base Media file.
- *
- * @param Zend_Io_Reader $reader The reader object.
- * @param Array $options The options array.
- */
- public function __construct($reader, &$options = array())
- {
- parent::__construct($reader, $options);
- $entryCount = $this->_reader->readUInt32BE();
- for ($i = 1; $i <= $entryCount; $i++) {
- $this->_chunkOffsetTable[$i] = $this->_reader->readInt64BE();
- }
- }
- /**
- * Returns an array of values. Each entry has the entry number as its index
- * and a 64 bit integer that gives the offset of the start of a chunk into
- * its containing media file as its value.
- *
- * @return Array
- */
- public function getChunkOffsetTable()
- {
- return $this->_chunkOffsetTable;
- }
- /**
- * Sets an array of chunk offsets. Each entry must have the entry number as
- * its index and a 64 bit integer that gives the offset of the start of a
- * chunk into its containing media file as its value.
- *
- * @param Array $chunkOffsetTable The chunk offset array.
- */
- public function setChunkOffsetTable($chunkOffsetTable)
- {
- $this->_chunkOffsetTable = $chunkOffsetTable;
- }
- /**
- * Returns the box heap size in bytes.
- *
- * @return integer
- */
- public function getHeapSize()
- {
- return parent::getHeapSize() + 4 + count($this->_chunkOffsetTable) * 8;
- }
- /**
- * Writes the box data.
- *
- * @param Zend_Io_Writer $writer The writer object.
- * @return void
- */
- protected function _writeData($writer)
- {
- $writer->writeUInt32BE($entryCount = count($this->_chunkOffsetTable));
- for ($i = 1; $i <= $entryCount; $i++) {
- $writer->writeInt64BE($this->_chunkOffsetTable[$i]);
- }
- }
- }