export interface TimelineSlotConfig {
    id: string;
    cooldownMs: number;
    enabled?: boolean;
    offsetMs?: number;
}
export interface TimelineSlot {
    readonly id: string;
    readonly cooldownMs: number;
    readonly remainingMs: number;
    readonly enabled: boolean;
}
export interface TimelineBoardState {
    readonly slots: readonly TimelineSlot[];
    readonly elapsedMs: number;
}
export interface TimelineFire {
    slotId: string;
    slotIndex: number;
    atMs: number;
}
export interface TimelineTickResult {
    state: TimelineBoardState;
    fires: readonly TimelineFire[];
}
/** @internal */
export declare function createTimelineBoardState(slots: readonly TimelineSlotConfig[]): TimelineBoardState;
/** @internal */
export declare function tickTimeline(state: TimelineBoardState, dtMs: number): TimelineTickResult;
/** @internal */
export declare function setSlotEnabled(state: TimelineBoardState, slotId: string, enabled: boolean): TimelineBoardState;
/** @internal */
export declare function resetSlot(state: TimelineBoardState, slotId: string, remainingMs?: number): TimelineBoardState;
export interface TimelineBoard {
    state(): TimelineBoardState;
    tick(dtMs: number): readonly TimelineFire[];
    setEnabled(slotId: string, enabled: boolean): void;
    reset(slotId?: string, remainingMs?: number): void;
}
/**
 * A step-sequencer timeline board of timed, toggleable slots.
 *
 * @capability timeline-board a step-sequencer timeline board of timed slots
  * @internal
  */
export declare function createTimelineBoard(slots: readonly TimelineSlotConfig[]): TimelineBoard;