f0f4319044
* word-level timestamp is not needed for alignment * remove deprecated code * fix error when stop recording
47 lines
1.3 KiB
TypeScript
47 lines
1.3 KiB
TypeScript
import Pitchfinder from "pitchfinder";
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import { IPA_MAPPING } from "./constants";
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export const extractFrequencies = (props: {
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peaks: Float32Array;
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sampleRate: number;
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}): number[] => {
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const { peaks, sampleRate } = props;
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const detectPitch = Pitchfinder.AMDF({
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sampleRate,
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sensitivity: 0.05,
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});
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const duration = peaks.length / sampleRate;
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const bpm = peaks.length / duration / 60;
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const frequencies = Pitchfinder.frequencies(detectPitch, peaks, {
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tempo: bpm,
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quantization: bpm,
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});
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return frequencies;
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};
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export function milisecondsToTimestamp(ms: number) {
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const hours = Math.floor(ms / 3600000).toString();
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const minutes = Math.floor((ms % 3600000) / 60000).toString();
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const seconds = Math.floor(((ms % 360000) % 60000) / 1000).toString();
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const milliseconds = Math.floor(((ms % 360000) % 60000) % 1000).toString();
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return `${hours.padStart(2, "0")}:${minutes.padStart(
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2,
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"0"
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)}:${seconds.padStart(2, "0")},${milliseconds}`;
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}
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export const convertIpaToNormal = (ipa: string) => {
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const mark = ipa.match(/(\ˈ|ˌ)/);
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const cleanIpa = ipa.replace(mark ? mark[0] : "", "");
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const converted = IPA_MAPPING[cleanIpa] || cleanIpa;
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if (mark) {
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return `${mark[0]}${converted}`;
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} else {
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return converted;
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}
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};
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