Struct Ac3SyncInfo 

pub struct Ac3SyncInfo {
    pub fscod: u8,
    pub bit_rate_code: u8,
    pub bsid: u8,
    pub bsmod: u8,
    pub acmod: u8,
    pub lfeon: bool,
}

Parsed AC-3 sync-header fields needed to populate the MP4 dac3 AudioSpecificConfig box per ETSI TS 102 366 §F.4 (AC3SpecificBox).

All fields come straight off the BSI (Bit Stream Information) header: syncinfo (5 bytes) + bsi { bsid bsmod acmod cmixlev/surmixlev dsurmod lfeon … }.

bit_rate_code and fscod come from the syncinfo block (frmsizecod upper 5 bits = bit_rate_code; fscod = 2 bits at top of syncinfo after the 4-byte sync prefix).

Fields

fscod: u8

fscod (2 bits): sample rate code. 0=48k, 1=44.1k, 2=32k, 3=reserved.

bit_rate_code: u8

bit_rate_code (5 bits, ETSI TS 102 366 Table F.6 / Table 4.6): indexes the nominal bit-rate table 0..=18 → 32..=640 kbps.

bsid: u8

bsid (5 bits): bit-stream identification. AC-3 = 8; bsid==16 marks E-AC-3 (different parser path).

bsmod: u8

bsmod (3 bits): bit-stream mode (CM, music, dialogue, etc.).

acmod: u8

acmod (3 bits): audio coding mode / channel layout. See ETSI Table F.4: 0 = 1+1 dual mono, 1 = 1/0 mono, 2 = 2/0 stereo, 3 = 3/0, 4 = 2/1, 5 = 3/1, 6 = 2/2, 7 = 3/2 (5.1 if lfeon=1).

lfeon: bool

lfeon (1 bit): low-frequency-effects channel present.

Trait Implementations

impl Clone for Ac3SyncInfo

fn clone(&self) -> Ac3SyncInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Ac3SyncInfo

impl Debug for Ac3SyncInfo

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

Formats the value using the given formatter.

impl Eq for Ac3SyncInfo

impl PartialEq for Ac3SyncInfo

fn eq(&self, other: &Ac3SyncInfo) -> 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 Ac3SyncInfo