@svta/common-media-library/dist/cjs/webvtt/parse/parseTimestamp.js

A common library for media playback in JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseTimeStamp = parseTimeStamp;
function computeSeconds(h, m, s, f) {
    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;
}
// Try to parse input as a time stamp.
function parseTimeStamp(input) {
    var _a;
    // TODO: Optimize parsing to avoid creating new arrays and strings.
    const m = input.match(/^(\d+):(\d{1,2})(:\d{1,2})?\.(\d{3})/);
    if (!m) {
        return null;
    }
    const first = parseInt(m[1]);
    const second = parseInt(m[2]);
    const third = parseInt(((_a = m[3]) === null || _a === void 0 ? void 0 : _a.replace(':', '')) || '0');
    const fourth = parseInt(m[4]);
    if (m[3]) {
        // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]
        return computeSeconds(first, second, third, fourth);
    }
    else if (first > 59) {
        // Timestamp takes the form of [hours]:[minutes].[milliseconds]
        // First position is hours as it's over 59.
        return computeSeconds(first, second, 0, fourth);
    }
    else {
        // Timestamp takes the form of [minutes]:[seconds].[milliseconds]
        return computeSeconds(0, first, second, fourth);
    }
}
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