import { AudioLevelMonitor } from '../asr/audio-level.js';
export declare function isRealtimeAudioCaptureAvailable(): boolean;
export interface RealtimeAudioCapture {
    createLevelMonitor(onLevel: (level: number) => void): AudioLevelMonitor;
    start(onChunk: (audioBase64: string) => Promise<void>): void;
    stop(): Promise<void>;
    abort(): void;
}
export declare class RealtimeAudioCaptureSession implements RealtimeAudioCapture {
    private readonly stream;
    private readonly context;
    private readonly source;
    private readonly processor;
    private readonly sink;
    private queue;
    private onChunk;
    private pendingPcm;
    private resamplePhase;
    private deliveryGeneration;
    private closed;
    private failure;
    private constructor();
    static create(): Promise<RealtimeAudioCaptureSession>;
    createLevelMonitor(onLevel: (level: number) => void): AudioLevelMonitor;
    start(onChunk: (audioBase64: string) => Promise<void>): void;
    stop(): Promise<void>;
    abort(): void;
    private enqueuePcm;
    private enqueueChunk;
}