@ekx/auph/web/dist/module/webaudio/Bus.js

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import { getAudioContextObject } from "./Mixer";
import { iMask, Unit } from "../protocol/interface";
import { add, connectAudioNode, disconnectAudioNode, len, resize } from "./common";
var BusObj = /** @class */ (function () {
    function BusObj(g) {
        this.g = g;
        this.h = 0;
        this.s = 1 /* Active */ | 2 /* Running */;
        this.G = Unit;
    }
    return BusObj;
}());
export { BusObj };
export var busLine = [];
export function createBusObj(ctx) {
    var next = len(busLine);
    var obj = new BusObj(ctx.createGain());
    obj.h = next | 268435456 /* Bus */;
    add(busLine, obj);
    return obj;
}
export function initBusPool(ctx) {
    var master = createBusObj(ctx).g;
    connectAudioNode(master, ctx.destination);
    connectAudioNode(createBusObj(ctx).g, master);
    connectAudioNode(createBusObj(ctx).g, master);
    connectAudioNode(createBusObj(ctx).g, master);
}
export function termBusPool() {
    for (var i = 0; i < len(busLine); ++i) {
        disconnectAudioNode(busLine[i].g);
    }
    resize(busLine, 0);
}
export function _getBus(bus) {
    var obj = busLine[bus & iMask];
    return (obj && obj.h === bus) ? obj : null;
}
export function _getBusGain(handle) {
    var obj = _getBus(handle);
    return obj ? obj.g : undefined;
}
export function _setBusConnected(bus, connected) {
    var flag = !!(bus.s & 2 /* Running */);
    if (flag !== connected) {
        var master = busLine[0];
        var dest = bus === master ? getAudioContextObject().destination : master.g;
        if (connected) {
            connectAudioNode(bus.g, dest);
        }
        else {
            disconnectAudioNode(bus.g, dest);
        }
        bus.s ^= 2 /* Running */;
    }
}
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