32 lines
1.6 KiB
JavaScript
32 lines
1.6 KiB
JavaScript
import {ToneDetector} from './test-signals.js';
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// Explicit paired-signal mode only. Bounded numeric observations; never PCM.
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class PairedSignals extends AudioWorkletProcessor {
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constructor() {
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super();this.detector=new ToneDetector(sampleRate);
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this.frames=0;this.inputFrames=0;this.zeros=0;this.energy=0;this.peak=0;
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this.events=[];this.overflow=0;this.credit=true;this.next=0;this.stopped=false;
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this.port.onmessage=({data})=>{if(data==='ack')this.credit=true;if(data==='stop')this.stopped=true;};
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}
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process(inputs,outputs) {
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if(this.stopped||this.frames>=sampleRate*125)return false;
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this.frames+=outputs[0]?.[0]?.length??128;
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const samples=inputs[0]?.[0];
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if(samples) {
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for(const x of samples){this.inputFrames++;this.energy+=x*x;this.peak=Math.max(this.peak,Math.abs(x));if(x===0)this.zeros++;}
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for(const event of this.detector.process(samples,currentFrame)) {
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if(this.events.length<32)this.events.push(event);else this.overflow++;
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}
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}
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if(this.credit&&this.frames>=this.next) {
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this.port.postMessage({activity:{inputFrames:this.inputFrames,processedFrames:this.frames,
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exactZeroFrames:this.zeros,rms:this.inputFrames?Math.sqrt(this.energy/this.inputFrames):0,
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peak:this.peak,sampleRate},signals:this.events,overflow:this.overflow});
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this.events=[];this.credit=false;this.next=this.frames+sampleRate;
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}
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// Browser initializes every output block to zero. No mic monitoring.
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return true;
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}
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}
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registerProcessor('av-paired-signals',PairedSignals);
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