import { AudioCaptureMetrics } from "./types";
export declare const DEFAULT_AUDIO_METRICS: {
    speechRmsThreshold: number;
    utteranceEndSilenceMs: number;
    clippingThreshold: number;
    callbackGapThresholdMs: number;
};
export type AudioCaptureMetricsState = AudioCaptureMetrics & {
    inputSampleRate: number;
    targetSampleRate: number;
    channelCount: number;
    currentRms: number;
    peakRms: number;
    currentPeakAmplitude: number;
    clippingEventCount: number;
    silenceRatio: number;
    speechActivityRatio: number;
    audioCallbackGapCount: number;
    longestAudioCallbackGapMs: number;
    processedFrameCount: number;
    silentFrameCount: number;
    speechFrameCount: number;
    lastFrameAt: number | null;
    speechActive: boolean;
    silenceStartedAt: number | null;
};
export type AudioCaptureUpdateResult = {
    speechStarted: boolean;
    speechEnded: boolean;
};
export declare const createInitialAudioCaptureMetrics: (inputSampleRate: number, targetSampleRate: number, channelCount: number) => AudioCaptureMetricsState;
export declare const updateAudioCaptureMetrics: (state: AudioCaptureMetricsState, input: {
    at: number;
    sampleData: Float32Array;
}) => AudioCaptureUpdateResult;
export declare const finalizeAudioCaptureMetrics: (state: AudioCaptureMetricsState) => AudioCaptureMetricsState;
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