import { StreamingSampleStats } from "./stats";
import { BufferingMetrics, MetricsDrainExitReason, MetricsFinishDeliveryState } from "./types";
export type BufferingMetricsState = BufferingMetrics & {
    isBufferingAudio: boolean;
    isDrainingAudio: boolean;
    pendingBufferedAudioBytes: number;
    persistedBufferedAudioBytes: number;
    persistedBufferedAudioSegments: number;
    totalBufferedAudioBytes: number;
    peakBufferedAudioBytes: number;
    bufferingDurationMs: number;
    drainingDurationMs: number;
    drainCycles: number;
    bufferStallCount: number;
    bufferingStartedAtInternal: number | null;
    drainingStartedAtInternal: number | null;
    bufferingDurationBaseMs: number;
    drainingDurationBaseMs: number;
    previousBufferedTotalBytes: number;
    previousBufferedAt: number | null;
    bufferGrowthRateStats: StreamingSampleStats;
    bufferDrainRateStats: StreamingSampleStats;
    previousDrainExitReason: MetricsDrainExitReason;
};
export declare const createInitialBufferingMetrics: () => BufferingMetricsState;
export declare const updateBufferingMetrics: (state: BufferingMetricsState, input: {
    at: number;
    isBufferingAudio: boolean;
    isDrainingAudio: boolean;
    pendingBufferedAudioBytes: number;
    persistedBufferedAudioBytes: number;
    persistedBufferedAudioSegments: number;
    totalBufferedAudioBytes: number;
    lastDrainProgressAt: number | null;
    drainCycles: number;
    drainExitReason: MetricsDrainExitReason;
    finishDeliveryState: MetricsFinishDeliveryState;
}) => BufferingMetricsState;
export declare const finalizeBufferingMetrics: (state: BufferingMetricsState, now: number) => BufferingMetricsState;
//# sourceMappingURL=bufferingMetrics.d.ts.map