Class FoaDecoder

The FOA rotate-and-decode graph. Wire source → input and output → wherever.

Index

Constructors

Properties

input output rotationGains nodes lastRotation disposed context

Accessors

Methods

setCameraQuaternion applyRotation dispose

Constructors

constructor

new FoaDecoder(context: BaseAudioContext): FoaDecoder
Parameters
- context: BaseAudioContext
Returns FoaDecoder
- Defined in src/audio/foa-decoder.ts:96

Properties

`Readonly`input

input: ChannelSplitterNode

Feed the 4-channel source here.

`Readonly`output

output: ChannelMergerNode

Stereo out.

`Private` `Readonly`rotationGains

rotationGains: GainNode[][] = []

rotationGains[i][j]: rotated dipole i (Y, Z, X order as ACN 1..3) ← source dipole j.

`Private` `Readonly`nodes

nodes: AudioNode[] = []

`Private` `Readonly`lastRotation

lastRotation: Matrix3 = ...

`Private`disposed

disposed: boolean = false

`Readonly`context

context: BaseAudioContext

Accessors

rotation

get rotation(): Matrix3
The rotation matrix currently applied (tests).

Returns Matrix3
- Defined in src/audio/foa-decoder.ts:169

Methods

setCameraQuaternion

setCameraQuaternion(q: Quaternion): void
Point the field at the camera: the world-fixed bed is heard from the camera's orientation. Cheap and idempotent — unchanged rotations return without touching a param.
Parameters
- q: Quaternion
Returns void
- Defined in src/audio/foa-decoder.ts:151

`Private`applyRotation

applyRotation(m: Matrix3): void
Parameters
- m: Matrix3
Returns void
- Defined in src/audio/foa-decoder.ts:173

dispose

dispose(): void
Returns void
- Defined in src/audio/foa-decoder.ts:188