node-taglib-sharp / Exports / Mpeg4AppleElementaryStreamDescriptor

Class: Mpeg4AppleElementaryStreamDescriptor

This class extends FullBox to provide an implementation of an Apple ElementaryStreamDescriptor. This box may appear as a child of a IsoAudioSampleEntry and provided further information about an audio stream.

Hierarchy

• Mpeg4FullBox

  ↳ Mpeg4AppleElementaryStreamDescriptor

Table of contents

Accessors

• averageBitrate
• boxType
• bufferSizeDB
• data
• dataPosition
• dataSize
• decoderConfig
• dependsOnEsId
• flags
• handlerType
• hasChildren
• header
• maximumBitrate
• objectTypeId
• ocrEsId
• ocrStreamFlag
• size
• streamDependenceFlag
• streamId
• streamPriority
• streamType
• upStream
• urlFlag
• urlLength
• urlString
• version

Methods

• addChild
• clearChildren
• getChild
• getChildRecursively
• getChildren
• increaseDataPosition
• initializeFromHeader
• initializeFromHeaderFileAndHandler
• initializeFromType
• initializeFromTypeVersionAndFlags
• loadData
• removeChildByBox
• removeChildByType
• removeChildrenByBox
• fromFile

Accessors

averageBitrate

• get averageBitrate(): number

Gets the maximum average the stream described by the current instance.

Returns

number

---

boxType

• get boxType(): ByteVector

Gets the MPEG-4 box type of the current instance.

Returns

ByteVector

Inherited from

FullBox.boxType

---

bufferSizeDB

• get bufferSizeDB(): number

Gets the buffer size DB value the stream described by the current instance.

Returns

number

---

data

• get data(): ByteVector

Gets the data contained in the current instance.

Returns

ByteVector

Inherited from

FullBox.data

• set data(v): void

Sets the data contained in the current instance.

Parameters

Name	Type
v	ByteVector

Returns

void

Inherited from

FullBox.data

---

dataPosition

• get dataPosition(): number

Gets the position of the data contained in the current instance, after any box specific headers.

Returns

number

Inherited from

FullBox.dataPosition

---

dataSize

• get dataSize(): number

Gets the size of the data contained in the current instance, minus the size of any box specific headers.

Returns

number

Inherited from

FullBox.dataSize

---

decoderConfig

• get decoderConfig(): ByteVector

Gets the decoder config data of stream described by the current instance.

Returns

ByteVector

---

dependsOnEsId

• get dependsOnEsId(): number

Gets the ES_ID of another elementary stream on which this elementary stream depends

Returns

number

---

flags

• get flags(): number

Gets the flags that apply to the current instance.

Returns

number

Inherited from

FullBox.flags

• set flags(value): void

Sets the flags that apply to the current instance.

Parameters

Name	Type
value	number

Returns

void

Inherited from

FullBox.flags

---

handlerType

• get handlerType(): ByteVector

Gets the type of the handler box that applies to the current instance.

Returns

ByteVector

Inherited from

FullBox.handlerType

---

hasChildren

• get hasChildren(): boolean

Gets whether the current instance has children.

Returns

boolean

Inherited from

FullBox.hasChildren

---

header

• get header(): Mpeg4BoxHeader

Gets the header of the current instance.

Returns

Mpeg4BoxHeader

Inherited from

FullBox.header

---

maximumBitrate

• get maximumBitrate(): number

Gets the maximum bitrate the stream described by the current instance.

Returns

number

---

objectTypeId

• get objectTypeId(): number

Gets the object type ID of the stream described by the current instance.

Returns

number

---

ocrEsId

• get ocrEsId(): number

Gets the OCR ES_ID

Returns

number

---

ocrStreamFlag

• get ocrStreamFlag(): boolean

Gets the OCR Stream Flag

Returns

boolean

---

size

• get size(): number

Gets the total size of the current instance as it last appeared on disk.

Returns

number

Inherited from

FullBox.size

---

streamDependenceFlag

• get streamDependenceFlag(): boolean

Gets a value indicating that a dependsOn_ES_ID will follow

Returns

boolean

---

streamId

• get streamId(): number

Gets the ID of the stream described by the current instance.

Returns

number

---

streamPriority

• get streamPriority(): number

Gets the priority of the stream described by the current instance.

Returns

number

---

streamType

• get streamType(): number

Gets the type of stream described by the current instance.

Returns

number

---

upStream

• get upStream(): boolean

Gets a value indicating that this stream is used for upstream information

Returns

boolean

---

urlFlag

• get urlFlag(): boolean

Gets a value indicating that a URL string will follow

Returns

boolean

---

urlLength

• get urlLength(): number

Gets the length of URL String

Returns

number

---

urlString

• get urlString(): string

Gets the URL string that points to the location of an SL-packetized stream by name.

Returns

string

---

version

• get version(): number

Gets the version number of the current instance.

Returns

number

Inherited from

FullBox.version

Methods

addChild

▸ addChild(box): void

Adds a specified box to the current instance.

See

Mpeg4Box object to add to the current instance.

Parameters

Name	Type	Description
box	Mpeg4Box	A

Returns

void

Inherited from

Mpeg4FullBox.addChild

---

clearChildren

▸ clearChildren(): void

Removes all children from the current instance.

Returns

void

Inherited from

Mpeg4FullBox.clearChildren

---

getChild

▸ getChild<TBox>(type, predicate?): TBox

Gets a child box from the current instance by finding a matching box type.

See

ByteVector object containing the box type to match.

Type parameters

Name	Type
TBox	extends Mpeg4Box<TBox>

Parameters

Name	Type	Description
type	ByteVector	A
predicate?	(b: TBox) => boolean	Optional predicate to filter boxes with the provided type.

Returns

TBox

TBox Box containing the matched box, or undefined if no match was found.

Inherited from

Mpeg4FullBox.getChild

---

getChildRecursively

▸ getChildRecursively(type): Mpeg4Box

Gets a child box from the current instance by finding a matching box type, searching recursively.

See

ByteVector object containing the box type to match.

Parameters

Name	Type	Description
type	ByteVector	A

Returns

Mpeg4Box

Mpeg4Box Matching box, or undefined if no matching box was found

Inherited from

Mpeg4FullBox.getChildRecursively

---

getChildren

▸ getChildren<TBox>(type, predicate?): TBox[]

Gets all child boxes from the current instance by finding a matching box type.

See

ByteVector object containing the box type to match.

Type parameters

Name	Type
TBox	extends Mpeg4Box<TBox>

Parameters

Name	Type	Description
type	ByteVector	A
predicate?	(b: TBox) => boolean	Optional predicate to filter boxes with the provided type.

Returns

TBox[]

Mpeg4Box[] Array of matching boxes, or undefined if no matching boxes was found.

Inherited from

Mpeg4FullBox.getChildren

---

increaseDataPosition

▸ increaseDataPosition(value): number

Increases the data position by a given value. This function can be used by boxes which extend from

See

Mpeg4Box to increase the data position, because the data is located after their box specific headers.

Parameters

Name	Type	Description
value	number	The value to add to the data position.

Returns

number

number Data position before the increase.

Inherited from

Mpeg4FullBox.increaseDataPosition

---

initializeFromHeader

▸ Protected initializeFromHeader(header, handlerType?): void

Initializes a new instance of

See

• Mpeg4Box with a specified header and handler.
• Mpeg4BoxHeader object describing the new instance.

Parameters

Name	Type	Description
header	Mpeg4BoxHeader	A
handlerType?	ByteVector	Type of the handler box object containing the handler that applies to the new instance, or undefined if no handler applies.

Returns

void

Inherited from

Mpeg4FullBox.initializeFromHeader

---

initializeFromHeaderFileAndHandler

▸ Protected initializeFromHeaderFileAndHandler(header, file, handlerType): void

Initializes a new instance of FullBox with a provided header and handler by reading the contents from a specified file.

Parameters

Name	Type	Description
header	Mpeg4BoxHeader	A Mpeg4BoxHeader object containing the header to use for the new instance.
file	File	A File object to read the contents of the box from.
handlerType	ByteVector	Type of the handler box object containing the handler that applies to the new instance, or undefined if no handler applies.

Returns

void

Inherited from

Mpeg4FullBox.initializeFromHeaderFileAndHandler

---

initializeFromType

▸ Protected initializeFromType(type): void

Initializes a new instance of

See

• Mpeg4Box with a specified box type.
• ByteVector object containing the box type to use for the new instance.

Parameters

Name	Type	Description
type	ByteVector	A

Returns

void

Inherited from

Mpeg4FullBox.initializeFromType

---

initializeFromTypeVersionAndFlags

▸ Protected initializeFromTypeVersionAndFlags(type, version, flags): void

Initializes a new instance of FullBox with a provided header, version, and flags.

Parameters

Name	Type	Description
type	ByteVector	A ByteVector object containing the four byte box type.
version	number	A value containing the version of the new instance.
flags	number	A value containing the flags for the new instance.

Returns

void

Inherited from

Mpeg4FullBox.initializeFromTypeVersionAndFlags

---

loadData

▸ loadData(file): ByteVector

Loads the data of the current instance from a specified file using the internal data position and size.

See

File from which the current instance was read and from which to read the data.

Parameters

Name	Type	Description
file	File	The

Returns

ByteVector

ByteVector Data read from the file.

Inherited from

Mpeg4FullBox.loadData

---

removeChildByBox

▸ removeChildByBox(box): void

Removes a specified box from the current instance.

Parameters

Name	Type	Description
box	Mpeg4Box	Box to remove from the current instance.

Returns

void

Inherited from

Mpeg4FullBox.removeChildByBox

---

removeChildByType

▸ removeChildByType(type): void

Removes all children with a specified box type from the current instance.

Parameters

Name	Type	Description
type	ByteVector	Type of box to remove

Returns

void

Inherited from

Mpeg4FullBox.removeChildByType

---

removeChildrenByBox

▸ removeChildrenByBox(boxes): void

Removes all specified boxes from the current instance.

Parameters

Name	Type	Description
boxes	Mpeg4Box[]	Collection of boxes to remove from the current instance.

Returns

void

Inherited from

Mpeg4FullBox.removeChildrenByBox

---

fromFile

▸ Static fromFile(header, file, handlerType): Mpeg4AppleElementaryStreamDescriptor

Constructs and initializes a new instance of AppleElementaryStreamDescriptor with a provided header and handler by reading the contents from a specified file.

Parameters

Name	Type	Description
header	Mpeg4BoxHeader	A Mpeg4BoxHeader object containing the header to use for the new instance.
file	File	A File object to read the contents of the box from.
handlerType	ByteVector	Type of the handler box object containing the handler that applies to the new instance, or undefined if no handler applies.

Returns

Mpeg4AppleElementaryStreamDescriptor