Class: Processor<ResultT, ParamsT>

@geenee/armature.Processor

Core generic processor

Processor is a computational core of any application and the most essential part of the Engine in an app's pipeline. Processing results are used by Renderer to update scene. Every processor must define methods to initialize and release instances required for image processing, and evaluation of processing results on provided image (where all logic happens). Processor is a generic abstract class defining common API.

Type parameters

Name	Type	Description
ResultT	extends Object =	Type of processing results
ParamsT	extends ProcParams = ProcParams	Type of processor parameters

Hierarchy

• EventEmitterT<ProcessorEvents>

  ↳ Processor

Constructors

constructor

• new Processor<ResultT, ParamsT>()

Constructor

Type parameters

Name	Type
ResultT	extends Object =
ParamsT	extends ProcParams = ProcParams

Overrides

EventEmitterT.constructor

Properties

cameraAngle

• cameraAngle: number

Camera vertical angle in radians

---

cameraRatio

• cameraRatio: number

Camera aspect ratio

---

optimalSize

• optimalSize: number = 1024

Recommended maximum size of input

---

params

• Protected params: Partial<ParamsT> = {}

Processor parameters

---

videoRatio

• Protected videoRatio: number

Aspect ratio of input video

---

videoSize

• Protected videoSize: Size

Resolution of input video

Methods

addListener

▸ addListener<E>(event, listener): Processor<ResultT, ParamsT>

Adds the listener function to the end of the listeners array

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
listener	ProcessorEvents[E]	The callback function

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.addListener

---

dispose

▸ dispose(): void

Dispose processor object

Releases resources and instances allocated by processor. Processor object cannot be used after calling dispose(). Overridden by derived classes for particular processing.

Returns

void

---

emit

▸ emit<E>(event, ...args): boolean

Synchronously calls each of the listeners registered for the event

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
...args	Args<ProcessorEvents[E]>	Arguments passed to the listeners

Returns

boolean

True if the event had listeners, False otherwise

Inherited from

EventEmitterT.emit

---

eventNames

▸ eventNames(): (string | symbol)[]

List of emitter's events

Returns

(string | symbol)[]

List of emitter's events

Inherited from

EventEmitterT.eventNames

---

getMaxListeners

▸ getMaxListeners(): number

Maximum number of listeners per event

Returns

number

Maximum number of listeners per event

Inherited from

EventEmitterT.getMaxListeners

---

init

▸ init(params, size?, ratio?): Promise<boolean>

Initialize processor

Initializes all resources required for video processing. Overridden by derived classes for particular application.

Parameters

Name	Type	Description
params	ParamsT	Processor parameters
size?	Size	Resolution of input video
ratio?	number	Aspect ration of input video

Returns

Promise<boolean>

Status of initialization

---

listenerCount

▸ listenerCount<E>(event): number

The number of listeners listening to the event

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event

Returns

number

Number of listeners

Inherited from

EventEmitterT.listenerCount

---

listeners

▸ listeners<E>(event): Function[]

Copy of the array of listeners for the event

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event

Returns

Function[]

Copy of the listeners array

Inherited from

EventEmitterT.listeners

---

off

▸ off<E>(event, listener): Processor<ResultT, ParamsT>

Removes the listener from the listener array for the event

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
listener	ProcessorEvents[E]	The callback function

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.off

---

on

▸ on<E>(event, listener): Processor<ResultT, ParamsT>

Adds the listener function to the event

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
listener	ProcessorEvents[E]	The callback function

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.on

---

once

▸ once<E>(event, listener): Processor<ResultT, ParamsT>

Adds a one-time listener function for the event

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
listener	ProcessorEvents[E]	The callback function

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.once

---

prependListener

▸ prependListener<E>(event, listener): Processor<ResultT, ParamsT>

Adds the listener function to the beginning of the listeners array

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
listener	ProcessorEvents[E]	The callback function

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.prependListener

---

prependOnceListener

▸ prependOnceListener<E>(event, listener): Processor<ResultT, ParamsT>

Adds a one-time listener function to the beginning of the listeners array

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
listener	ProcessorEvents[E]	The callback function

Returns

Processor<ResultT, ParamsT>

Inherited from

EventEmitterT.prependOnceListener

---

process

▸ process(input, timestamp?): Promise<ResultT>

Process the image

Main method defining the logic of video processing. Overridden by derived classes for particular application.

Parameters

Name	Type	Description
input	ImageInput	Image
timestamp?	number	Timestamp

Returns

Promise<ResultT>

---

rawListeners

▸ rawListeners<E>(event): Function[]

Copy of the array of listeners for the event including wrappers

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event

Returns

Function[]

Copy of the listeners array

Inherited from

EventEmitterT.rawListeners

---

removeAllListeners

▸ removeAllListeners<E>(event?): Processor<ResultT, ParamsT>

Removes all listeners, or those of the specified event

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event?	E	The name of the event

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.removeAllListeners

---

removeListener

▸ removeListener<E>(event, listener): Processor<ResultT, ParamsT>

Removes the specified listener from the listener array

Type parameters

Name	Type
E	extends keyof ProcessorEvents

Parameters

Name	Type	Description
event	E	The name of the event
listener	ProcessorEvents[E]	The callback function

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.removeListener

---

reset

▸ reset(): void

Reset processor

Resets all processing instances to the initial state. Overridden by derived classes for particular processing.

Returns

void

---

setMaxListeners

▸ setMaxListeners(n): Processor<ResultT, ParamsT>

Sets maximum number of listeners per event

Parameters

Name	Type	Description
n	number	Maximum number of listeners

Returns

Processor<ResultT, ParamsT>

This EventEmitter

Inherited from

EventEmitterT.setMaxListeners

---

setupVideo

▸ setupVideo(size, ratio?): void

Set resolution of the input video

Could be overridden to adjust processing pipeline.

Parameters

Name	Type	Description
size	Size	Resolution of input video
ratio?	number	Aspect ration of input video

Returns

void