Struct Eac3SyncInfo 

pub struct Eac3SyncInfo {
    pub strmtyp: u8,
    pub substreamid: u8,
    pub frmsiz: u16,
    pub fscod: u8,
    pub fscod2: u8,
    pub numblkscod: u8,
    pub acmod: u8,
    pub lfeon: bool,
    pub bsid: u8,
    pub dialnorm: u8,
    pub bsmod: u8,
}

Parsed E-AC-3 sync-header fields needed to populate the MP4 dec3 AudioSpecificConfig box per ETSI TS 102 366 §F.6 (EC3SpecificBox).

Independent-substream subset only — no dependent substream fields are extracted (num_dep_sub defaults to 0). Vanilla 5.1 E-AC-3 is the dominant case in the wild and fits this profile.

Fields

strmtyp: u8

strmtyp (2 bits). 0 = independent. We only support strmtyp=0 frames (Squad-26 scope; dependent / independent-substream-w/-deps deferred).

substreamid: u8

substreamid (3 bits) — 0 for vanilla E-AC-3.

frmsiz: u16

frmsiz (11 bits): frame size in 16-bit words minus one (frame size in bytes = (frmsiz + 1) * 2). Squad-26 uses this only to derive data_rate for the dec3 box.

fscod: u8

fscod (2 bits): 0=48k 1=44.1k 2=32k 3=use_fscod2 (reduced-rate).

fscod2: u8

fscod2 (2 bits): only valid when fscod==3. 0=24k 1=22.05k 2=16k.

numblkscod: u8

numblkscod (2 bits): 0..=3 → 1/2/3/6 audio blocks per frame.

acmod: u8

acmod (3 bits): channel layout — same encoding as AC-3 (Table F.4).

lfeon: bool

lfeon (1 bit): LFE channel present.

bsid: u8

bsid (5 bits): always 16 for E-AC-3 (11..=16 reserved for AC-3 extensions; we only emit bsid==16 in dec3).

dialnorm: u8

dialnorm (5 bits) — informational; dec3 doesn’t carry it.

bsmod: u8

bsmod (3 bits) — only present when compre==1 / dialnorm valid; we emit zero when absent (matches ffmpeg behaviour).

Trait Implementations

impl Clone for Eac3SyncInfo

fn clone(&self) -> Eac3SyncInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Eac3SyncInfo

impl Debug for Eac3SyncInfo

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

Formats the value using the given formatter.

impl Eq for Eac3SyncInfo

impl PartialEq for Eac3SyncInfo

fn eq(&self, other: &Eac3SyncInfo) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Eac3SyncInfo