/** Reason a camera was switched to low quality. Determines recovery behavior. */
export declare enum LqReason {
    /** Currently HQ or initial state. */
    None = "none",
    /** Video element height <= smallItemHeightPx threshold. */
    SmallItem = "smallItem",
    /** MOS dropped below mosThreshold (connection performance). */
    Performance = "performance",
    /** Camera count exceeded maxCamerasBeforeForceLq when this camera was added. */
    TooManyItems = "tooManyItems",
    /** Added while other cameras had non-size LQ reasons (inherited degradation). */
    InheritedLq = "inheritedLq",
    /** User explicitly set TargetStream.LOW. */
    Manual = "manual",
    /** Camera demoted by maxConcurrentHighRes cap enforcement. */
    CapExceeded = "capExceeded"
}
/** Per-camera state tracked by the RadassController. */
export interface CameraRadassState {
    connectionKey: string;
    currentQuality: 'high' | 'low';
    lqReason: LqReason;
    /** Timestamp of last quality switch (performance.now()). */
    lastSwitchTime: number;
    /** Timestamp when item first became "small" (null if not small). */
    smallSince: number | null;
    /** Timestamp when this camera was registered. */
    registeredAt: number;
    /** Per-camera anti-thrash flag. When true, this camera can't be promoted for performance. */
    antiThrash: boolean;
    /** Timestamp when anti-thrash was set for this camera. */
    antiThrashAt: number;
    /** True if this camera was recently promoted from performance LQ. */
    performancePromotionPending: boolean;
}
/** Configuration for the RadassController. All timing values in milliseconds. */
export interface RadassConfig {
    /** Main tick interval. Default: 500. */
    tickIntervalMs: number;
    /** Minimum gap between quality switches per camera. Default: 5000. */
    switchCooldownMs: number;
    /** Height threshold (px) below which item is "small" -> LQ. Default: 171. */
    smallItemHeightPx: number;
    /** Height threshold (px) above which a "small" item can return to HQ. Default: 230. */
    hysteresisHeightPx: number;
    /** Viewport area fraction above which item is forced HQ. Default: 0.50. */
    forceHighViewportFraction: number;
    /** Maximum concurrent high-res streams. Default: 6. */
    maxConcurrentHighRes: number;
    /** Camera count above which new cameras start LQ. Default: 16. */
    maxCamerasBeforeForceLq: number;
    /** MOS below this = performance problem. Default: 3.5. */
    mosThreshold: number;
    /** Area ratio for swap logic (large LQ / small HQ). Default: 2.0. */
    swapSizeRatio: number;
    /** Time before retrying after anti-thrash block. Default: 600_000 (10 min). */
    antiThrashRetryMs: number;
    /** Time item must be small before LQ switch. Default: 1000. */
    smallItemDelayMs: number;
    /** Grace period for newly-added cameras (skip size/perf checks). Default: 1000. */
    recentlyAddedDelayMs: number;
    /** Minimum stats updates (inclusive) before performance demotion is allowed.
     *  A camera needs >= this many updateStats() calls before Check 3 considers its MOS.
     *  Stats are polled every ~1s, so 10 = ~10s of stable data before MOS is trusted.
     *  Default: 10. */
    minStatsForPerformanceCheck: number;
}
/** Default RADASS config matching desktop client values. */
export declare const DEFAULT_RADASS_CONFIG: RadassConfig;
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