Class: shaka.util.Mp4Parser

Constructor

new Mp4Parser()

Source:

Members

BoxType_ :number

An enum used to track the type of box so that the correct values can be read from the header.
Type:
  • number
Properties:
Name Value Type Description
BASIC_BOX 0 number
FULL_BOX 1 number
Source:

boxDefinitions_ :Object.<number, !shaka.util.Mp4Parser.CallbackType>

Type:
Source:

done_ :boolean

Type:
  • boolean
Source:

headers_ :Object.<number, shaka.util.Mp4Parser.BoxType_>

Type:
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Methods

allData(callback) → {shaka.util.Mp4Parser.CallbackType}

Create a callback that tells the Mp4 parser to treat the body of a box as a binary blob and to parse the body's contents using the provided callback.
Parameters:
Name Type Description
callback function(!Uint8Array)
Source:
Returns:
Type
shaka.util.Mp4Parser.CallbackType

audioSampleEntry(boxnon-null)

A callback that tells the Mp4 parser to treat the body of a box as a audio sample entry. A audio sample entry has some fixed-sized fields describing the audio codec parameters, followed by an arbitrary number of appended children. Each child is a box.
Parameters:
Name Type Description
box shaka.extern.ParsedBox
Source:

children(boxnon-null)

A callback that tells the Mp4 parser to treat the body of a box as a series of boxes. The number of boxes is limited by the size of the parent box.
Parameters:
Name Type Description
box shaka.extern.ParsedBox
Source:

headerSize(box) → {number}

Find the header size of the box. Useful for modifying boxes in place or finding the exact offset of a field.
Parameters:
Name Type Description
box shaka.extern.ParsedBox
Source:
Returns:
Type
number

sampleDescription(boxnon-null)

A callback that tells the Mp4 parser to treat the body of a box as a sample description. A sample description box has a fixed number of children. The number of children is represented by a 4 byte unsigned integer. Each child is a box.
Parameters:
Name Type Description
box shaka.extern.ParsedBox
Source:

typeFromString_(name) → {number}

Convert an ascii string name to the integer type for a box.
Parameters:
Name Type Description
name string The name of the box. The name must be four characters long.
Source:
Returns:
Type
number

typeToString(type) → {string}

Convert an integer type from a box into an ascii string name. Useful for debugging.
Parameters:
Name Type Description
type number The type of the box, a uint32.
Source:
Returns:
Type
string

visualSampleEntry(boxnon-null)

A callback that tells the Mp4 parser to treat the body of a box as a visual sample entry. A visual sample entry has some fixed-sized fields describing the video codec parameters, followed by an arbitrary number of appended children. Each child is a box.
Parameters:
Name Type Description
box shaka.extern.ParsedBox
Source:

box(type, definitionnon-null) → {shaka.util.Mp4Parser}

Declare a box type as a Box.
Parameters:
Name Type Description
type string
definition shaka.util.Mp4Parser.CallbackType
Source:
Returns:
Type
shaka.util.Mp4Parser

fullBox(type, definitionnon-null) → {shaka.util.Mp4Parser}

Declare a box type as a Full Box.
Parameters:
Name Type Description
type string
definition shaka.util.Mp4Parser.CallbackType
Source:
Returns:
Type
shaka.util.Mp4Parser

parse(datanon-null, partialOkayopt, stopOnPartialopt)

Parse the given data using the added callbacks.
Parameters:
Name Type Attributes Description
data BufferSource
partialOkay boolean <optional>
 If true, allow reading partial payloads from some boxes. If the goal is a child box, we can sometimes find it without enough data to find all child boxes.
stopOnPartial boolean <optional>
 If true, stop reading if an incomplete box is detected.
Source:

parseNext(absStart, readernon-null, partialOkayopt, stopOnPartialopt)

Parse the next box on the current level.
Parameters:
Name Type Attributes Description
absStart number The absolute start position in the original byte array.
reader shaka.util.DataViewReader
partialOkay boolean <optional>
 If true, allow reading partial payloads from some boxes. If the goal is a child box, we can sometimes find it without enough data to find all child boxes.
stopOnPartial boolean <optional>
 If true, stop reading if an incomplete box is detected.
Source:

stop()

Stop parsing. Useful for extracting information from partial segments and avoiding an out-of-bounds error once you find what you are looking for.
Source:

Type Definitions

CallbackType

Type:
  • function(!shaka.extern.ParsedBox)
Source: