text: const WebmBaseDemuxer = require('./WebmBase');
  
  const VORBIS_HEAD = Buffer.from([...'vorbis'].map(x => x.charCodeAt(0)));
  
  /**
   * Demuxes a Webm stream (containing Vorbis audio) to output a Vorbis stream.
   * @extends {WebmBaseDemuxer}
   */
  class WebmVorbisDemuxer extends WebmBaseDemuxer {
    _checkHead(data) {
      if (data.readUInt8(0) !== 2 || !data.slice(4, 10).equals(VORBIS_HEAD)) {
        throw Error('Audio codec is not Vorbis!');
      }
  
      this.push(data.slice(3, 3 + data.readUInt8(1)));
      this.push(data.slice(3 + data.readUInt8(1), 3 + data.readUInt8(1) + data.readUInt8(2)));
      this.push(data.slice(3 + data.readUInt8(1) + data.readUInt8(2)));
    }
  }
  
  module.exports = WebmVorbisDemuxer;
  