55 lines
1.8 KiB
JavaScript
55 lines
1.8 KiB
JavaScript
class TransportProcessor extends AudioWorkletProcessor {
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constructor(options) {
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super(options);
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this.port.addEventListener("message", this.handleMessage);
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this.port.start();
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this.started = false;
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this.totalPausedTime = 0;
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this.lastPausedTime = 0;
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this.startedAgainTime = 0;
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this.wasStopped = false;
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}
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handleMessage = (message) => {
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if (message.data && message.data.type === "ping") {
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this.port.postMessage(message.data);
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} else if (message.data === "start") {
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this.started = true;
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} else if (message.data === "pause") {
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this.started = false;
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if(this.lastPausedTime === 0) {
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this.lastPausedTime = currentTime;
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}
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} else if (message.data === "stop") {
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this.started = false;
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this.totalPausedTime = 0;
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this.lastPausedTime = 0;
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this.startedAgainTime = 0;
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this.wasStopped = true;
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}
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};
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process(inputs, outputs, parameters) {
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if (this.started) {
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if(this.lastPausedTime>0) {
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const pausedTime = currentTime-this.lastPausedTime;
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this.totalPausedTime += pausedTime;
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this.lastPausedTime = 0;
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}
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if(this.wasStopped) {
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this.startedAgainTime = currentTime;
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this.wasStopped = false;
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}
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const logicalTime = currentTime-this.totalPausedTime-this.startedAgainTime;
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//console.log("Logical/Current:", logicalTime, currentTime);
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this.port.postMessage({ type: "bang", logicalTime });
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}
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return true;
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}
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}
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registerProcessor(
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"transport",
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TransportProcessor
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); |