bs_read_u32
uint32_t bs_read_u32(bin_stream_t * bs);
md->md_version = bs_read_u32(&bs);
md->md_chunk_size = bs_read_u32(&bs);
md->md_id = bs_read_u32(&bs);
md->chunk_count = bs_read_u32(&bs);
md->chunk_next = bs_read_u32(&bs);