mirror of
https://github.com/Tonejs/Tone.js
synced 2024-12-28 20:43:08 +00:00
104 lines
2.6 KiB
TypeScript
104 lines
2.6 KiB
TypeScript
import { ToneAudioNode, ToneAudioNodeOptions } from "../../core/context/ToneAudioNode";
|
|
import { Merge } from "./Merge";
|
|
import { Add } from "../../signal/Add";
|
|
import { Multiply } from "../../signal/Multiply";
|
|
import { Subtract } from "../../signal/Subtract";
|
|
import { Gain } from "../../core/context/Gain";
|
|
import { optionsFromArguments } from "../../core/util/Defaults";
|
|
|
|
export type MidSideMergeOptions = ToneAudioNodeOptions;
|
|
|
|
/**
|
|
* MidSideMerge merges the mid and side signal after they've been separated by [[MidSideMerge]]
|
|
* ```
|
|
* Mid = (Left+Right)/sqrt(2); // obtain mid-signal from left and right
|
|
* Side = (Left-Right)/sqrt(2); // obtain side-signal from left and righ
|
|
* ```
|
|
*/
|
|
export class MidSideMerge extends ToneAudioNode<MidSideMergeOptions> {
|
|
|
|
readonly name: string = "MidSideMerge";
|
|
|
|
/**
|
|
* There is no input, connect sources to either [[mid]] or [[side]] inputs.
|
|
*/
|
|
readonly input: undefined;
|
|
|
|
/**
|
|
* The merged signal
|
|
*/
|
|
readonly output: Merge;
|
|
|
|
/**
|
|
* Merge the incoming signal into left and right channels
|
|
*/
|
|
private _merge: Merge;
|
|
|
|
/**
|
|
* The "mid" input.
|
|
*/
|
|
readonly mid: Gain;
|
|
|
|
/**
|
|
* The "side" input.
|
|
*/
|
|
readonly side: Gain;
|
|
|
|
/**
|
|
* Recombine the mid/side into Left
|
|
*/
|
|
private _left: Add;
|
|
|
|
/**
|
|
* Recombine the mid/side into Right
|
|
*/
|
|
private _right: Subtract;
|
|
|
|
/**
|
|
* Multiply the right by sqrt(1/2)
|
|
*/
|
|
private _leftMult: Multiply;
|
|
|
|
/**
|
|
* Multiply the left by sqrt(1/2)
|
|
*/
|
|
private _rightMult: Multiply;
|
|
|
|
constructor(options?: Partial<MidSideMergeOptions>);
|
|
constructor() {
|
|
super(optionsFromArguments(MidSideMerge.getDefaults(), arguments));
|
|
this.mid = new Gain({ context: this.context });
|
|
this.side = new Gain({ context: this.context });
|
|
this._left = new Add({ context: this.context });
|
|
this._leftMult = new Multiply({
|
|
context: this.context,
|
|
value: Math.SQRT1_2
|
|
});
|
|
this._right = new Subtract({ context: this.context });
|
|
this._rightMult = new Multiply({
|
|
context: this.context,
|
|
value: Math.SQRT1_2
|
|
});
|
|
this._merge = this.output = new Merge({ context: this.context });
|
|
|
|
this.mid.fan(this._left);
|
|
this.side.connect(this._left.addend);
|
|
this.mid.connect(this._right);
|
|
this.side.connect(this._right.subtrahend);
|
|
this._left.connect(this._leftMult);
|
|
this._right.connect(this._rightMult);
|
|
this._leftMult.connect(this._merge, 0, 0);
|
|
this._rightMult.connect(this._merge, 0, 1);
|
|
}
|
|
|
|
dispose(): this {
|
|
super.dispose();
|
|
this.mid.dispose();
|
|
this.side.dispose();
|
|
this._leftMult.dispose();
|
|
this._rightMult.dispose();
|
|
this._left.dispose();
|
|
this._right.dispose();
|
|
return this;
|
|
}
|
|
}
|