mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : buf[0]) << 8)
| (mp->pc.index > 1 ? mp->pc.buffer[1] : buf[1-mp->pc.index]);
mp->bytes_left = (mp->bytes_left & 0xfff) * 2;
+ if (mp->bytes_left <= 0) { // prevent infinite loop
+ goto lost_sync;
+ }
mp->bytes_left -= mp->pc.index;
}