Not working on latest Google Chrome

[Bajdzis]

antimatter15/whammy#70

Can you change content file ts-whammy\utils\parseRIFF.ts by this :

import { IRiff } from '../interfaces';

type ChunkSizeAndBinaryData = string;

function readUint32LittleEndian(buffer: string, offset: number): number {
    const val = parseInt(
        buffer
            .substr(offset, 4)
            .split('')
            .map(function (i) {
                const unpadded = i.charCodeAt(0).toString(2);
                return new Array(8 - unpadded.length + 1).join('0') + unpadded;
            })
            .reverse()
            .join(''),
        2,
    );
    return val;
}

/**
 * 对于 VP8X，需要提取出其中的 VP8 或 VP8L bit stream chunk。
 * 关于 VP8X 格式，参见 Extended file format: https://developers.google.com/speed/webp/docs/riff_container#extended_file_format
 * @param buffer VP8X Chunk数据，不含 "VP8X" tag
 */
function extractBitStreamFromVp8x(buffer: string): ChunkSizeAndBinaryData {
    /*
   32bit VP8X Chunk size
   8bit Flags: Rsv I L E X A R
   24bit Reserved
   24bit Canvas Width Minus One
   24bit Canvas Height Minus One
  */
    let offset = 4 + 1 + 3 + 3 + 3;
    while (offset < buffer.length) {
        const chunkTag = buffer.substr(offset, 4);
        offset += 4;
        const chunkSize = readUint32LittleEndian(buffer, offset);
        offset += 4;
        switch (chunkTag) {
            case 'VP8 ':
            case 'VP8L':
                // eslint-disable-next-line no-case-declarations
                const size = buffer.substr(offset - 4, 4);
                // eslint-disable-next-line no-case-declarations
                const body = buffer.substr(offset, chunkSize);
                return size + body;
            default:
                offset += chunkSize;
                break;
        }
    }
    throw new Error('VP8X format error: missing VP8/VP8L chunk.');
}

export default function parseRIFF(string: string): IRiff {
    let offset = 0;
    const chunks: {
        [index: string]: any;
    } = {};

    while (offset < string.length) {
        const id = string.substr(offset, 4);
        chunks[id] = chunks[id] || [];
        if (id === 'RIFF' || id === 'LIST') {
            const len = readUint32LittleEndian(string, offset + 4);
            const data = string.substr(offset + 4 + 4, len);
            offset += 4 + 4 + len;
            chunks[id].push(parseRIFF(data));
        } else if (id === 'WEBP') {
            const vpVersion = string.substr(offset + 4, 4);
            switch (vpVersion) {
                case 'VP8X':
                    chunks[id].push(extractBitStreamFromVp8x(string.substr(offset + 8)));
                    break;
                case 'VP8 ':
                case 'VP8L':
                    // Use (offset + 8) to skip past "VP8 " / "VP8L" field after "WEBP"
                    chunks[id].push(string.substr(offset + 8));
                    break;
                default:
                    // eslint-disable-next-line no-console
                    console.error(`not supported webp version: "${vpVersion}"`);
                    break;
            }
            offset = string.length;
        } else {
            // Unknown chunk type; push entire payload
            chunks[id].push(string.substr(offset + 4));
            offset = string.length;
        }
    }
    return (chunks as any) as IRiff;
}

[Akimyou]

Ok, i will update and test later.

[Akimyou]

if you have time, you can make an PR please.