From a435de089da4dd37c3c183f633a49107c720dd95 Mon Sep 17 00:00:00 2001 From: Dalyn Cessac Date: Wed, 16 Mar 2011 11:06:40 -0500 Subject: Added phpvideotoolkit transcoder and updates to the preset ui --- .../php-reader/src/ISO14496/Box/SUBS.php | 138 +++++++++++++++++++++ 1 file changed, 138 insertions(+) create mode 100644 libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/SUBS.php (limited to 'libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/SUBS.php') diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/SUBS.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/SUBS.php new file mode 100644 index 0000000..83ae8ac --- /dev/null +++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/SUBS.php @@ -0,0 +1,138 @@ +Sub-Sample Information Box is designed to contain sub-sample + * information. + * + * A sub-sample is a contiguous range of bytes of a sample. The specific + * definition of a sub-sample shall be supplied for a given coding system (e.g. + * for ISO/IEC 14496-10, Advanced Video Coding). In the absence of such a + * specific definition, this box shall not be applied to samples using that + * coding system. + * + * If subsample_count is 0 for any entry, then those samples have no subsample + * information and no array follows. The table is sparsely coded; the table + * identifies which samples have sub-sample structure by recording the + * difference in sample-number between each entry. The first entry in the table + * records the sample number of the first sample having sub-sample information. + * + * Note: It is possible to combine subsamplePriority and discardable such that + * when subsamplePriority is smaller than a certain value, discardable is set to + * 1. However, since different systems may use different scales of priority + * values, to separate them is safe to have a clean solution for discardable + * sub-samples. + * + * @package php-reader + * @subpackage ISO 14496 + * @author Sven Vollbehr + * @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_SUBS extends ISO14496_Box_Full +{ + /** @var Array */ + private $_subSampleTable = 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 = $this->_reader->readUInt32BE(); + for ($i = 0; $i < $entryCount; $i++) { + $entry = array(); + $entry["sampleDelta"] = $this->_reader->readUInt32BE(); + $entry["subsamples"] = array(); + if (($subsampleCount = $this->_reader->readUInt16BE()) > 0) { + for ($j = 0; $j < $subsampleCount; $j++) { + $subsample = array(); + if ($this->getVersion() == 1) + $subsample["subsampleSize"] = $this->_reader->readUInt32BE(); + else + $subsample["subsampleSize"] = $this->_reader->readUInt16BE(); + $subsample["subsamplePriority"] = $this->_reader->readInt8(); + $subsample["discardable"] = $this->_reader->readInt8(); + $this->_reader->skip(4); + $entry["subsamples"][] = $subsample; + } + $this->_subSampleTable[] = $entry; + } + } + } + + /** + * Returns an array of values. Each entry is an array containing the following + * keys. + * o sampleDelta -- an integer that specifies the sample number of the + * sample having sub-sample structure. It is coded as the difference + * between the desired sample number, and the sample number indicated in + * the previous entry. If the current entry is the first entry, the value + * indicates the sample number of the first sample having sub-sample + * information, that is, the value is the difference between the sample + * number and zero (0). + * o subsamples -- an array of subsample arrays, each containing the + * following keys. + * o subsampleSize -- an integer that specifies the size, in bytes, of + * the current sub-sample. + * o subsamplePriority -- an integer specifying the degradation priority + * for each sub-sample. Higher values of subsamplePriority, indicate + * sub-samples which are important to, and have a greater impact on, + * the decoded quality. + * o discardable -- equal to 0 means that the sub-sample is required to + * decode the current sample, while equal to 1 means the sub-sample is + * not required to decode the current sample but may be used for + * enhancements, e.g., the sub-sample consists of supplemental + * enhancement information (SEI) messages. + * + * @return Array + */ + public function getSubSampleTable() + { + return $this->_subSampleTable; + } +} -- cgit v1.2.3