Struct TrackProtection 

pub struct TrackProtection {
    pub stream_index: usize,
    pub scheme_type: [u8; 4],
    pub scheme_version: u32,
    pub tenc: TencBox,
}

Per-track CENC protection signalling for the muxer (ISO/IEC 14496-12 §8.12 envelope + ISO/IEC 23001-7 §4.1 carriage).

When a Mp4MuxerOptions::track_protection entry targets a stream, the muxer wraps that track’s sample entry into its protected form: the FourCC becomes encv / enca / enct / encs (per the stream’s media type) and a sinf box — frma(original_format) + schm(scheme_type, scheme_version) + schi(tenc) — is appended to the entry body, exactly the shape this crate’s demuxer unwraps back to the original codec id plus protection_scheme / cenc_default_* options.

The muxer signals protection only — packet payloads are written as handed in. The caller encrypts each sample first (e.g. via cenc_cipher::encrypt_sample_in_place with a CencSchemeDecision built from this same (scheme_type, tenc) pair) and carries the per-sample IVs / subsample maps through its own senc / saiz / saio channel.

Fields

stream_index: usize

Index into the muxer’s streams slice (the stream to protect).

scheme_type: [u8; 4]

§8.12.5 scheme_type FourCC — one of the ISO/IEC 23001-7 §10 schemes (cenc / cbc1 / cens / cbcs) or a private dialect FourCC (validated structurally only in that case).

scheme_version: u32

§8.12.5 32-bit scheme_version word. Every ISO/IEC 23001-7 edition to date uses 0x0001_0000 (the Default here).

tenc: TencBox

Track-default encryption parameters written into schi/tenc (ISO/IEC 23001-7 §8.2). Must satisfy the same round-trip rules as cenc::build_tenc_box plus scheme coherence (a §10 scheme pins the tenc version; pattern schemes need a non-zero pattern pair) — violations fail at open.

Trait Implementations

impl Clone for TrackProtection

fn clone(&self) -> TrackProtection

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TrackProtection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.