54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
import { tryEvaluate } from "./Evaluator";
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const zeroPad = (num, places) => String(num).padStart(places, '0')
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export class TransportNode extends AudioWorkletNode {
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constructor(context, options, application) {
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super(context, "transport", options);
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this.app = application
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this.port.addEventListener("message", this.handleMessage);
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this.port.start();
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this.timeviewer = document.getElementById("timeviewer");
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}
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/** @type {(this: MessagePort, ev: MessageEvent<any>) => any} */
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handleMessage = (message) => {
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if (message.data && message.data.type === "bang") {
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this.app.clock.tick++
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const futureTimeStamp = this.app.clock.convertTicksToTimeposition(this.app.clock.tick);
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this.app.clock.time_position = futureTimeStamp;
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this.timeviewer.innerHTML = `${zeroPad(futureTimeStamp.bar, 2)}:${futureTimeStamp.beat+1}:${zeroPad(futureTimeStamp.pulse, 2)}`;
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if (this.app.exampleIsPlaying) {
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tryEvaluate(this.app, this.app.example_buffer);
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} else {
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tryEvaluate(this.app, this.app.global_buffer);
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}
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}
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};
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start() {
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this.port.postMessage("start");
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}
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pause() {
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this.port.postMessage("pause");
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}
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setBPM(bpm) {
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this.port.postMessage({ type: "bpm", value: bpm });
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}
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setPPQN(ppqn) {
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this.port.postMessage({ type: "ppqn", value: ppqn });
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}
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stop() {
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this.port.postMessage("stop");
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}
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}
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