Struct Envelope 

pub struct Envelope {
    pub start: bool,
    pub loop_flag: bool,
    pub constant: bool,
    pub volume_or_period: u8,
    pub divider: u8,
    pub decay: u8,
}

Envelope generator.

Fields

start: bool

Restart flag — set by length-load writes; consumed at next quarter clock.

loop_flag: bool

Loop flag (a.k.a. length-counter halt, depending on the channel).

constant: bool

Constant-volume bit. When set, output = volume_or_period.

volume_or_period: u8

Volume (constant mode) or divider period - 1 (decay mode).

divider: u8

Internal divider counter.

decay: u8

Internal decay counter (4-bit, 15 -> 0).

Implementations

impl Envelope

pub fn clock(&mut self)

Quarter-frame clock.

pub const fn output(&self) -> u8

Output volume (0..=15).

Trait Implementations

impl Clone for Envelope

fn clone(&self) -> Envelope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Envelope

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

Formats the value using the given formatter.

impl Default for Envelope

fn default() -> Envelope

Returns the “default value” for a type.

impl Copy for Envelope