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/STTS.php | 110 +++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STTS.php (limited to 'libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STTS.php') diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STTS.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STTS.php new file mode 100644 index 0000000..ae0e39c --- /dev/null +++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ISO14496/Box/STTS.php @@ -0,0 +1,110 @@ +Decoding Time to Sample Box contains a compact version of a table + * that allows indexing from decoding time to sample number. Other tables give + * sample sizes and pointers, from the sample number. Each entry in the table + * gives the number of consecutive samples with the same time delta, and the + * delta of those samples. By adding the deltas a complete time-to-sample map + * may be built. + * + * The Decoding Time to Sample Box contains decode time delta's: DT(n+1) = DT(n) + * + STTS(n) where STTS(n) is the (uncompressed) table entry for sample n. + * + * The sample entries are ordered by decoding time stamps; therefore the deltas + * are all non-negative. + * + * The DT axis has a zero origin; DT(i) = SUM(for j=0 to i-1 of delta(j)), and + * the sum of all deltas gives the length of the media in the track (not mapped + * to the overall timescale, and not considering any edit list). + * + * The {@link ISO14496_Box_ELST Edit List Box} provides the initial CT value if + * it is non-empty (non-zero). + * + * @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_STTS extends ISO14496_Box_Full +{ + /** @var Array */ + private $_timeToSampleTable = 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++) + $this->_timeToSampleTable[$i] = array + ("sampleCount" => + Transform::fromUInt32BE(substr($data, ($i - 1) * 8, 4)), + "sampleDelta" => + Transform::fromUInt32BE(substr($data, $i * 8 - 4, 4))); + } + + /** + * Returns an array of values. Each entry is an array containing the following + * keys. + * o sampleCount -- an integer that counts the number of consecutive samples + * that have the given duration. + * o sampleDelta -- an integer that gives the delta of these samples in the + * time-scale of the media. + * + * @return Array + */ + public function getTimeToSampleTable() + { + return $this->_timeToSampleTable; + } +} -- cgit v1.2.3