Enum Activity 

#[non_exhaustive]
pub enum Activity {
    Active,
    Dtx,
}

Whether a packet carried coded audio, or none at all.

Rides along with the audio it describes: on Frame coming out of decode, and on encode::Encoded going in. Codecs without a discontinuous mode (PCM, AAC) are always Active.

Read off the packet, so a consumer gets the same answer as the publisher and gets one for senders that are not us. Two things follow from that, and both are why this reports what arrived rather than what the speaker was doing:

• Opus marks withheld audio but not silence itself. A run of Dtx is interrupted every few hundred milliseconds by an ordinarily coded frame of the silence, which reads Active because nothing distinguishes it from speech resuming. So audio is never reported as silence, but silence is reported as audio a frame at a time. Hold a talking indicator across the gap rather than following it frame by frame.
• A frame that codes nothing usually means the sender withheld it, but RFC 6716 section 3.2.1 lets one stand for a frame that went missing on the way instead. A relay that repacketizes loss that way reads as Dtx.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Active

The packet coded audio for this frame.

Dtx

The packet coded no audio for this frame, which the sender does while its input is silent.

Implementations

impl Activity

pub fn is_active(self) -> bool

Whether the packet coded audio for this frame.

pub fn is_dtx(self) -> bool

Whether the packet coded no audio for this frame.

Trait Implementations

impl Clone for Activity

fn clone(&self) -> Activity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Activity

impl Debug for Activity

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

Formats the value using the given formatter.

impl Default for Activity

fn default() -> Activity

Returns the “default value” for a type.

impl Eq for Activity

impl PartialEq for Activity

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Activity