Docs For Class ISO14496_Box

Description

Samples within the media data are grouped into chunks. Chunks can be of different sizes, and the samples within a chunk can have different sizes.

The Sample To Chunk Box table can be used to find the chunk that contains a sample, its position, and the associated sample description.

The table is compactly coded. Each entry gives the index of the first chunk of a run of chunks with the same characteristics. By subtracting one entry here from the previous one, you can compute how many chunks are in this run. You can convert this to a sample count by multiplying by the appropriate samplesPerChunk.

author: Sven Vollbehr <svollbehr@gmail.com>
version: $Rev: 92 $
copyright: Copyright (c) 2008 The PHP Reader Project Workgroup
license: New BSD License

Located in /ISO14496/Box/STSC.php (line 61)

ISO14496_Box
   |
   --ISO14496_Box_Full
      |
      --ISO14496_Box_STSC

Method Summary

ISO14496_Box_STSC __construct (Reader $reader, [ &$options = array()])

Array getSampleToChunkTable ()

Variables

Inherited Variables

Inherited from ISO14496_Box_Full

ISO14496_Box_Full::$_flags
ISO14496_Box_Full::$_version

Inherited from ISO14496_Box

ISO14496_Box::$_reader

Methods

Constructor __construct (line 72)

Constructs the class with given parameters and reads box related data from the ISO Base Media file.

access: public

ISO14496_Box_STSC __construct (Reader $reader, [ &$options = array()])

Reader $reader: The reader object.
&$options

Redefinition of:

ISO14496_Box_Full::__construct(): Constructs the class with given parameters and reads box related data from the ISO Base Media file.

getSampleToChunkTable (line 106)

Returns an array of values. Each entry is an array containing the following keys.

firstChunk -- an integer that gives the index of the first chunk in this run of chunks that share the same samplesPerChunk and sampleDescriptionIndex; the index of the first chunk in a track has the value 1 (the firstChunk field in the first record of this box has the value 1, identifying that the first sample maps to the first chunk).

of these chunks.

sampleDescriptionIndex is an integer that gives the index of the sample entry that describes the samples in this chunk. The index ranges from 1 to the number of sample entries in the Sample Description Box.

access: public

Array getSampleToChunkTable ()

Inherited Methods

Inherited From ISO14496_Box_Full

ISO14496_Box_Full::__construct()
ISO14496_Box_Full::getFlags()
ISO14496_Box_Full::getVersion()
ISO14496_Box_Full::hasFlag()
ISO14496_Box_Full::setFlags()
ISO14496_Box_Full::setVersion()
ISO14496_Box_Full::__toString()

Inherited From ISO14496_Box

ISO14496_Box::__construct()
ISO14496_Box::addBox()
ISO14496_Box::constructBoxes()
ISO14496_Box::getBoxes()
ISO14496_Box::getBoxesByIdentifier()
ISO14496_Box::getContainer()
ISO14496_Box::getOffset()
ISO14496_Box::getOption()
ISO14496_Box::getOptions()
ISO14496_Box::getParent()
ISO14496_Box::getSize()
ISO14496_Box::getType()
ISO14496_Box::hasBox()
ISO14496_Box::isContainer()
ISO14496_Box::setContainer()
ISO14496_Box::setOffset()
ISO14496_Box::setOption()
ISO14496_Box::setOptions()
ISO14496_Box::setParent()
ISO14496_Box::setSize()
ISO14496_Box::setType()
ISO14496_Box::__get()
ISO14496_Box::__isset()
ISO14496_Box::__set()
ISO14496_Box::__toString()
ISO14496_Box::__unset()

Class ISO14496_Box_STSC

Inherited Variables

Inherited Methods