Enum AscSignaling 

pub enum AscSignaling {
    NoExtension,
    ImplicitMaybe,
    ExplicitSbr,
    ExplicitPs,
}

Per ISO 14496-3 §1.6.5: how the SBR / PS extension layer was signaled inside the ASC, if at all. Drives Apple-compat handling.

Variants

NoExtension

Pure AAC-LC (or other non-HE AOT). No extension layer signaled.

ImplicitMaybe

AAC-LC core with the SBR / PS layer signaled implicitly — that is, the ASC starts with AOT=2 and does not advertise SBR or PS, but the audio bitstream itself contains SBR / PS payloads. Apple players silently downgrade to mono 22.05 kHz. Must be upgraded to Explicit* before muxing for Apple-compat or rejected.

ExplicitSbr

SBR / PS layer signaled explicitly via the AOT=5 (SBR) or AOT=29 (PS) leading byte. Apple-compatible.

ExplicitPs

PS extension explicitly signaled (AOT=29 leading byte). PS implies SBR (PS rides on top of SBR per ISO 14496-3 §6).

Trait Implementations

impl Clone for AscSignaling

fn clone(&self) -> AscSignaling

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AscSignaling

impl Debug for AscSignaling

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

Formats the value using the given formatter.

impl Eq for AscSignaling

impl PartialEq for AscSignaling

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