e035cadb4d
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Tests / Declarative: Post Actions failed: 42, skipped: 89, passed: 4273
29 lines
1.4 KiB
JavaScript
29 lines
1.4 KiB
JavaScript
// A cumulative, one-credit metadata reporter: never copies or sends audio.
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class Activity extends AudioWorkletProcessor {
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constructor() {
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super(); this.frames=0; this.inputFrames=0; this.zeroFrames=0;
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this.energy=0; this.peak=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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const block=outputs[0]?.[0]?.length ?? 128;
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const samples=inputs[0]?.[0];
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this.frames+=block;
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if(samples) for(const value of samples) {
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this.inputFrames++; this.energy+=value*value;
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this.peak=Math.max(this.peak,Math.abs(value));
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if(value===0)this.zeroFrames++;
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}
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// Output is left at zero: no monitoring/playback or acoustic feedback.
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if(this.credit && this.frames>=this.next) {
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this.port.postMessage({inputFrames:this.inputFrames,processedFrames:this.frames,
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exactZeroFrames:this.zeroFrames,rms:this.inputFrames ? Math.sqrt(this.energy/this.inputFrames) : 0,
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peak:this.peak,sampleRate});
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this.credit=false; this.next=this.frames+sampleRate;
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}
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return true;
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}
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}
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registerProcessor('av-activity',Activity);
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