import type { ComputeAwareConfig, ComputeAwareDecision, SegmentPerfStat } from "@hevcjs/core";
type HlsInstance = any;
export interface HlsComputeAwareOptions extends ComputeAwareConfig {
    /**
     * Optional sink for telemetry — called on every observation, not just
     * cap changes. Useful for plotting speedX over time in a demo.
     *
     * `reason` is the decider's verdict on this observation:
     * `init` (window not full yet) | `hold` (no change) |
     * `lower` (cap stepped down) | `raise` (cap stepped up) |
     * `floor` (would step down, already on the lowest variant).
     */
    onObservation?: (stat: SegmentPerfStat, avgSpeedX: number, capIndex: number | null, reason: ComputeAwareDecision["reason"]) => void;
}
/**
 * Attach the compute-aware ABR feedback loop to an Hls instance.
 *
 * Safe to call before `loadSource()`: levels are looked up lazily as
 * segments arrive.
 *
 * @returns cleanup function — unsubscribes the perf-bus listener.
 *   Does NOT clear any cap already applied. To restore an unbounded ABR
 *   after detaching, set `hls.autoLevelCapping = -1`.
 */
export declare function attachHlsComputeAware(hls: HlsInstance, options?: HlsComputeAwareOptions): () => void;
export {};
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