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//! ETSI DVB-S2 / S2X / T2 BBFrame parser + builder.
//!
//! Supports both Normal Mode (NM) and High Efficiency Mode (HEM)
//! per EN 302 755 v1.4.1 §5.1.7.
//!
//! Entry points:
//! - [`header::Bbheader`] — the 10-byte BBHEADER with parse + serialize.
//! - [`packet::up_iter`] — user packet extraction from the data field.
//! - [`crc::crc8`] — CRC-8 encoder (EN 302 307-1 §5.1.4 / EN 302 755 Annex F).
//! - [`issy`] — ISSY field parser (EN 302 755 Annex C).
//!
//! # Quick start
//! ```
//! use dvb_bbframe::header::{Bbheader, Matype, Mode, TsGs, BBHEADER_LEN};
//!
//! let hdr = Bbheader {
//! matype: Matype { ts_gs: TsGs::Ts, sis: true, ccm: true, issyi: false, npd: false, ext: 0, isi: 0 },
//! upl: 1504, sync: 0x47, dfl: 1504, syncd: 0, mode: Mode::Normal, issy_in_header: None,
//! };
//! let bytes = hdr.serialize(); // 10-byte BBHEADER
//! assert_eq!(bytes.len(), BBHEADER_LEN);
//! assert_eq!(Bbheader::parse(&bytes).unwrap(), hdr); // byte-identical round-trip
//! ```
//! For recovering the inner TS carried in a T2-MI stream, see
//! `dvb_t2mi::inner_ts::InnerTsRecovery`, which drives this header + the
//! [`packet`] extractor for you.
//!
//! # RFU policy
//!
//! BBFrame `reserved_future_use` bits are **emitted as 1** and
//! `reserved_zero_future_use` bits as **0**, following the DVB convention.
//! Parsers accept any value (no rejection on non-zero RFU) for forward
//! compatibility.
pub use ;