/** One incoming audio stream, as Chromium's receive stats describe it (gh-53). Delays are
    averages over the last poll, so growth over a long call shows up as it happens. */
export interface ReceiveStream {
    id: string;
    ssrc: number | null;
    jitterMs: number | null;
    jitterBufferMs: number | null;
    jitterBufferTargetMs: number | null;
    jitterBufferMinimumMs: number | null;
    packetsLost: number | null;
    packetsReceived: number | null;
    concealedSamples: number | null;
    insertedSamplesForDeceleration: number | null;
    removedSamplesForAcceleration: number | null;
    interruptionCount: number | null;
    totalInterruptionDurationMs: number | null;
}
/** The cumulative counters a stream had at the last poll. */
export interface ReceiveCounters {
    emitted: number;
    delay: number;
    target: number | null;
    minimum: number | null;
}
/** The fields of an RTCStats entry read here. Chromium leaves out what it doesn't track. */
interface Stat {
    id?: string;
    type?: string;
    kind?: string;
    ssrc?: number;
    jitter?: number;
    jitterBufferDelay?: number;
    jitterBufferEmittedCount?: number;
    jitterBufferTargetDelay?: number;
    jitterBufferMinimumDelay?: number;
    packetsLost?: number;
    packetsReceived?: number;
    concealedSamples?: number;
    insertedSamplesForDeceleration?: number;
    removedSamplesForAcceleration?: number;
    interruptionCount?: number;
    totalInterruptionDuration?: number;
}
/**
 * Every inbound audio stream in `report`, each against its own previous counters, keyed by
 * stats id. `prev` is updated in place, and streams that have gone are dropped from it.
 */
export declare function readReceiveStreams(report: Iterable<Stat>, prev: Map<string, ReceiveCounters>): ReceiveStream[];
/** The largest value present, or null when there is none. */
export declare function worst(values: (number | null)[]): number | null;
/** A total across streams, or null when none of them reported it. */
export declare function total(values: (number | null)[]): number | null;
export {};