//***********************************
    //    Better WebM title parsing
    //***********************************
    // differences with the 2ch version:
    // - finds title text in more webms
    // - can handle cp1251 encoded text
    // Fails when bytes are made from text.encode('utf-8').decode('cp1251').encode('utf-8')

    const decodeText = (function() {
        if (!window.TextDecoder) {
            // "fancy" utf-8 decoder, see:
            // https://stackoverflow.com/a/13691499
            return function decodeUTF8(bytes) {
                try {
                    return decodeURIComponent(escape(String.fromCharCode.apply(0, bytes)));
                } catch(e) {
                    console.warn('failed to decode webm title', bytes, e);
                    return null;
                }
            }
        }

        const encodings = [ 'utf-8', 'cp1251' ];
        const options = { fatal: true };
        const decoders = encodings.map(e => new TextDecoder(e, options));

        return function decodeText(bytes) {
            for (const decoder of decoders) {
                try {
                    return decoder.decode(bytes);
                } catch(e) {
                    continue;
                }
            }

            console.warn('failed to decode webm title', bytes);
            return null;
        }
    })();


    // const MATROSKA_ID_SEGMENT = 0x18538067;
    const MATROSKA_ID_INFO = 0x1549A966;
    const MATROSKA_ID_TITLE = 0x7BA9;
    const MATROSKA_ID_MUXINGAPP = 0x4D80;
    const MATROSKA_ID_SEEK_POS = 0x53AC;

    MediaDataParser.prototype.getWebmTitle = function getWebmTitle() {
        const data = new DataView(this.data);
        const dataEnd = data.byteLength - 4;

        for (let i = 0; i < dataEnd; i++) {
            if (data.getUint32(i) === MATROSKA_ID_INFO) {
                if (data.getUint16(i + 4) === MATROSKA_ID_SEEK_POS) {
                    continue;
                }

                for (i += 4; i < dataEnd; i++) {
                    let tag = data.getUint16(i);

                    if (tag === MATROSKA_ID_TITLE) {
                        // |i:id_tag|i + 2:length|i + 3:bytes|
                        const bytes = new Uint8Array(this.data, i + 3, data.getUint8(i + 2) & 0x7F);
                        return decodeText(bytes) ?? ':: non-utf8 garbage ::';
                    }

                    if (tag === MATROSKA_ID_MUXINGAPP) {
                        // title not found, search the next info segment
                        break;
                    }
                }
            }
        }

        return '';
    }