@remotion/renderer/dist/render-partitions.js

Render Remotion videos using Node.js or Bun

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.renderPartitions = void 0;
const renderPartitions = ({ frames, concurrency, }) => {
    const partitions = [];
    let start = 0;
    for (let i = 0; i < concurrency; i++) {
        const end = start + Math.ceil((frames.length - start) / (concurrency - i));
        partitions.push(frames.slice(start, end));
        start = end;
    }
    return {
        partitions,
        getNextFrame: (pageIndex) => {
            if (partitions[pageIndex].length === 0) {
                const partitionLengths = partitions.map((p) => p.length);
                if (partitionLengths.every((p) => p === 0)) {
                    throw new Error('No more frames to render');
                }
                let longestRemainingPartitionIndex = -1;
                for (let i = 0; i < partitions.length; i++) {
                    if (longestRemainingPartitionIndex === -1) {
                        longestRemainingPartitionIndex = i;
                        continue;
                    }
                    if (partitions[i].length >
                        partitions[longestRemainingPartitionIndex].length) {
                        longestRemainingPartitionIndex = i;
                    }
                }
                if (longestRemainingPartitionIndex === -1) {
                    throw new Error('No more frames to render');
                }
                // Round up - let's say only one frame is left to render, we should take this one
                const slicePoint = Math.ceil(partitions[longestRemainingPartitionIndex].length / 2) -
                    // but don't forget it's zero indexed :)
                    1;
                partitions[pageIndex] =
                    partitions[longestRemainingPartitionIndex].slice(slicePoint);
                partitions[longestRemainingPartitionIndex] = partitions[longestRemainingPartitionIndex].slice(0, slicePoint);
            }
            const value = partitions[pageIndex].shift();
            if (value === undefined) {
                throw new Error('No more frames to render');
            }
            return value;
        },
    };
};
exports.renderPartitions = renderPartitions;