docs: private boolean parseExtssmd(int size, ByteBuffer bb) {
          int a = bb.get();
          int b = bb.getShort();
          extAvgBitrate = (a << 16) | (b & 0xffff);
          int i = 3;
          if (isVBR) {
              a = bb.get();
              b = bb.getShort();
              extPeakBitrate = (a << 16) | (b & 0xffff);
              extSmoothBuffSize = bb.getShort();
              i += 5;
          } else {
              extFramePayloadInBytes = bb.getInt();
              i += 4;
          }
          while (i < size) {
              bb.get();
              i++;
          }
          return true;
      }