72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
const SAMPLE_RATE = 48000;
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const PACKET_MS = 10;
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const PACKET_FRAMES = PACKET_MS / 1000 * SAMPLE_RATE;
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//const PACKET_FRAMES = 2400;
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console.log("Frames per packet:", PACKET_FRAMES);
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class RustWorklet extends AudioWorkletProcessor {
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constructor(options) {
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super();
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this.module = options.processorOptions;
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this.timestamp = null;
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this.buffer = new Float32Array(PACKET_FRAMES);
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this.buffer_offset = 0;
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if (sampleRate != SAMPLE_RATE) {
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throw Error(`sample rate ${sampleRate} should be ${SAMPLE_RATE}`);
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}
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console.log('RustWorklet:', this);
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}
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do_send() {
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const data = {
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format: 'f32',
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sampleRate: SAMPLE_RATE,
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//numberOfFrames: this.buffer_offset,
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numberOfFrames: this.buffer_offset,
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numberOfChannels: 1,
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timestamp: this.timestamp,
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//timestamp: null,
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data: this.buffer.slice(0, this.buffer_offset),
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};
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this.port.postMessage(data);
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this.buffer_offset = 0;
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this.timestamp = null;
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}
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process(inputs) {
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//console.log(inputs);
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if (inputs.length != 1) {
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console.log("We got " + inputs.length + " heads?")
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}
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const input = inputs[0];
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if (input.length == 0) {
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console.log("We got no ears?")
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return true
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}
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if (this.timestamp == null) {
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this.timestamp = currentFrame / SAMPLE_RATE * 1e6;
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}
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const frames = input[0];
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if (this.buffer_offset + frames.length > this.buffer.length) {
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// too full, send now
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this.do_send();
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}
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this.buffer.set(frames, this.buffer_offset);
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this.buffer_offset += frames.length;
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if (this.buffer_offset + 128 > this.buffer.length) {
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// full enough, send now
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this.do_send();
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}
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return true;
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}
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};
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registerProcessor("rust_mic_worklet", RustWorklet);
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