Struct SessionSequencer 

pub struct SessionSequencer {
    pub child: String,
    pub child_params: Vec<f32>,
    pub discrete: Vec<SessionSelector>,
    pub selected: u8,
    pub live: u8,
    pub lane: u8,
    pub step: u8,
    pub playing: bool,
    pub switch_quant: u8,
    pub chain: Vec<(u8, u8)>,
    pub patterns: Vec<SessionPattern>,
}

A sequencer as a session stores it.

Sparse: only the steps that are on are written, so a track with four hits on it is four lines of JSON rather than two thousand. Steps past the pattern’s current length are stored too — shortening a pattern masks its tail rather than clearing it, and a session that dropped the masked steps would turn that into a truncation the next time it was opened.

Fields

child: String

The child instrument, by the same key a track stores.

child_params: Vec<f32>

The child’s panel, so a sequencer track restores the sound it had.

discrete: Vec<SessionSelector>

The child’s selectors, by position. Same reasoning as crate::session::SessionTrack::discrete.

selected: u8

live: u8

lane: u8

Where the editor’s cursor was. Not needed to play anything, and kept because reopening a session on the step you were working on is the difference between resuming and starting again.

step: u8

playing: bool

switch_quant: u8

SwitchQuant::index.

chain: Vec<(u8, u8)>

(slot, repeats) per chain entry.

patterns: Vec<SessionPattern>

Implementations

impl SessionSequencer

pub fn from_state( state: &SequencerState, child: InstrumentType, child_params: &[f32], ) -> Self

Write a sequencer track out.

pub fn child_instrument(&self) -> InstrumentType

The child this session named, or the default when the name is one this build does not have — a track with no instrument at all is worse than a track with the wrong one, and the patterns are still right.

pub fn child_panel(&self, expected: usize) -> Option<Vec<f32>>

The child’s panel as it should be applied, with the stored selector positions resolved against today’s banks.

Returns None when the saved block is a different length from the instrument’s, which means it is a different panel — the same rule ordinary tracks follow, and for the same reason: copying it in slot by slot would load every value into the wrong control.

pub fn to_state(&self) -> SequencerState

Read a sequencer track back.

Trait Implementations

impl Clone for SessionSequencer

fn clone(&self) -> SessionSequencer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SessionSequencer

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SessionSequencer

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SessionSequencer

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SessionSequencer

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SessionSequencer