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Diffstat (limited to 'libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STCO.php')
-rw-r--r-- | libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STCO.php | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STCO.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STCO.php new file mode 100644 index 0000000..1b8e5cc --- /dev/null +++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STCO.php @@ -0,0 +1,122 @@ +<?php +/** + * PHP Reader Library + * + * Copyright (c) 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 + * @subpackage ISO 14496 + * @copyright Copyright (c) 2008 The PHP Reader Project Workgroup + * @license http://code.google.com/p/php-reader/wiki/License New BSD License + * @version $Id: STCO.php 92 2008-05-10 13:43:14Z svollbehr $ + */ + +/**#@+ @ignore */ +require_once("ISO14496/Box/Full.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 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 ISO14496_Box_MOOV Movie Box}) at the front, as the size of the + * {@link ISO14496_Box_MOOV Movie Box} will affect the chunk offsets to the + * media data. + * + * This box variant contains 32-bit offsets. + * + * @package php-reader + * @subpackage ISO 14496 + * @author Sven Vollbehr <svollbehr@gmail.com> + * @copyright Copyright (c) 2008 The PHP Reader Project Workgroup + * @license http://code.google.com/p/php-reader/wiki/License New BSD License + * @version $Rev: 92 $ + */ +final class ISO14496_Box_STCO extends ISO14496_Box_Full +{ + /** @var Array */ + private $_chunkOffsetTable = array(); + + /** + * Constructs the class with given parameters and reads box related data from + * the ISO Base Media file. + * + * @param Reader $reader The reader object. + */ + public function __construct($reader, &$options = array()) + { + parent::__construct($reader, $options); + + $entryCount = $this->_reader->readUInt32BE(); + $data = $this->_reader->read + ($this->getOffset() + $this->getSize() - $this->_reader->getOffset()); + for ($i = 1; $i <= $entryCount; $i++) + $this->_chunkOffsetTable[$i] = + Transform::fromUInt32BE(substr($data, ($i - 1) * 4, 4)); + } + + /** + * Returns an array of values. Each entry has the entry number as its index + * and a 32 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 32 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 = $chunkOffsetTable; + } + + /** + * Returns the box raw data. + * + * @return string + */ + public function __toString($data = "") + { + $data = Transform::toUInt32BE(count($this->_chunkOffsetTable)); + foreach ($this->_chunkOffsetTable as $chunkOffset) + $data .= Transform::toUInt32BE($chunkOffset); + return parent::__toString($data); + } +} |