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/ASF/Object/TimecodeIndex.php | 181 +++++++++++++++++++++ 1 file changed, 181 insertions(+) create mode 100644 libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ASF/Object/TimecodeIndex.php (limited to 'libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ASF/Object/TimecodeIndex.php') diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ASF/Object/TimecodeIndex.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ASF/Object/TimecodeIndex.php new file mode 100644 index 0000000..943a353 --- /dev/null +++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ASF/Object/TimecodeIndex.php @@ -0,0 +1,181 @@ +Timecode Index Object + * is used, it is recommended that timecodes be stored as a Payload Extension + * System on the appropriate stream. It is also recommended that every + * timecode appearing in the ASF file have a corresponging index entry. + * + * The index is designed to be broken into blocks to facilitate storage that is + * more space-efficient by using 32-bit offsets relative to a 64-bit base. That + * is, each index block has a full 64-bit offset in the block header that is + * added to the 32-bit offsets found in each index entry. If a file is larger + * than 2^32 bytes, then multiple index blocks can be used to fully index the + * entire large file while still keeping index entry offsets at 32 bits. + * + * To locate an object with a particular timecode in an ASF file, one would + * typically look through the Timecode Index Object in blocks of the + * appropriate range and try to locate the nearest possible timecode. The + * corresponding Offset field values of the Index Entry are byte + * offsets that, when combined with the Block Position value of the Index + * Block, indicate the starting location in bytes of an ASF Data Packet relative + * to the start of the first ASF Data Packet in the file. + * + * Any ASF file containing a Timecode Index Object shall also contain a + * Timecode Index Parameters Object in its + * {@link ASF_Object_Header ASF Header}. + * + * @package php-reader + * @subpackage ASF + * @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: 108 $ + */ +final class ASF_Object_TimecodeIndex extends ASF_Object +{ + /** + * Indicates that the index type is Nearest Past Data Packet. The Nearest + * Past Data Packet indexes point to the data packet whose presentation time + * is closest to the index entry time. + */ + const NEAREST_PAST_DATA_PACKET = 1; + + /** + * Indicates that the index type is Nearest Past Media. The Nearest Past + * Object indexes point to the closest data packet containing an entire object + * or first fragment of an object. + */ + const NEAREST_PAST_MEDIA = 2; + + /** + * Indicates that the index type is Nearest Past Cleanpoint. The Nearest Past + * Cleanpoint indexes point to the closest data packet containing an entire + * object (or first fragment of an object) that has the Cleanpoint Flag set. + * + * Nearest Past Cleanpoint is the most common type of index. + */ + const NEAREST_PAST_CLEANPOINT = 3; + + /** @var Array */ + private $_indexSpecifiers = array(); + + /** @var Array */ + private $_indexBlocks = array(); + + /** + * Constructs the class with given parameters and reads object related data + * from the ASF file. + * + * @param Reader $reader The reader object. + * @param Array $options The options array. + */ + public function __construct($reader, &$options = array()) + { + parent::__construct($reader, $options); + + $this->_reader->skip(4); + $indexSpecifiersCount = $this->_reader->readUInt16LE(); + $indexBlocksCount = $this->_reader->readUInt32LE(); + for ($i = 0; $i < $indexSpecifiersCount; $i++) + $this->_indexSpecifiers[] = array + ("streamNumber" => $this->_reader->readUInt16LE(), + "indexType" => $this->_reader->readUInt16LE()); + for ($i = 0; $i < $indexBlocksCount; $i++) { + $indexEntryCount = $this->_reader->readUInt32LE(); + $timecodeRange = $this->_reader->readUInt16LE(); + $blockPositions = array(); + for ($i = 0; $i < $indexSpecifiersCount; $i++) + $blockPositions[] = $this->_reader->readInt64LE(); + $indexEntries = array(); + for ($i = 0; $i < $indexEntryCount; $i++) { + $timecode = $this->_reader->readUInt32LE(); + $offsets = array(); + for ($i = 0; $i < $indexSpecifiersCount; $i++) + $offsets[] = $this->_reader->readUInt32LE(); + $indexEntries[] = array + ("timecode" => $timecode, + "offsets" => $offsets); + } + $this->_indexBlocks[] = array + ("timecodeRange" => $timecodeRange, + "blockPositions" => $blockPositions, + "indexEntries" => $indexEntries); + } + } + + /** + * Returns an array of index specifiers. Each entry consists of the following + * keys. + * + * o streamNumber -- Specifies the stream number that the Index + * Specifiers refer to. Valid values are between 1 and 127. + * + * o indexType -- Specifies the type of index. + * + * @return Array + */ + public function getIndexSpecifiers() { return $this->_indexSpecifiers; } + + /** + * Returns an array of index entries. Each entry consists of the following + * keys. + * + * o timecodeRange -- Specifies the timecode range for this block. + * Subsequent blocks must contain range numbers greater than or equal to + * this one. + * + * o blockPositions -- Specifies a list of byte offsets of the beginnings of + * the blocks relative to the beginning of the first Data Packet (for + * example, the beginning of the Data Object + 50 bytes). + * + * o indexEntries -- An array that consists of the following keys + * o timecode -- This is the 4-byte timecode for these entries. + * o offsets -- Specifies the offset. An offset value of 0xffffffff + * indicates an invalid offset value. + * + * @return Array + */ + public function getIndexBlocks() { return $this->_indexBlocks; } +} -- cgit v1.2.3