remotion/dist/random.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.random = void 0;
function mulberry32(a) {
    let t = a + 0x6d2b79f5;
    t = Math.imul(t ^ (t >>> 15), t | 1);
    t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
}
function hashCode(str) {
    let i = 0;
    let chr = 0;
    let hash = 0;
    for (i = 0; i < str.length; i++) {
        chr = str.charCodeAt(i);
        hash = (hash << 5) - hash + chr;
        hash |= 0; // Convert to 32bit integer
    }
    return hash;
}
/**
 * A deterministic pseudo-random number generator.
 * Pass in the same seed and get the same pseudorandom number.
 * See: https://remotion.dev/docs/random
 */
const random = (seed, dummy) => {
    if (dummy !== undefined) {
        throw new TypeError('random() takes only one argument');
    }
    if (seed === null) {
        return Math.random();
    }
    if (typeof seed === 'string') {
        return mulberry32(hashCode(seed));
    }
    if (typeof seed === 'number') {
        return mulberry32(seed * 10000000000);
    }
    throw new Error('random() argument must be a number or a string');
};
exports.random = random;
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