import { ILocalAudioTrack } from 'agora-rtc-sdk-ng';
import { AgoraRtcAudioRawDataConfig } from '../../../../core/rtc/type';
import { AgoraRtcAudioEffectContext } from '../struct';
import { AgoraEffectState, AgoraWebRtcExtensionDelegate } from '../type';
import { AgoraRtcDeviceManager } from '../device';
export declare class AgoraRtcMicrophoneControl {
    private _deviceId;
    private _deviceManager;
    private _extensionDelegate;
    private _effectState;
    protected logger: import("agora-foundation/lib/logger").Logger;
    private _isKeepRecording;
    private _isMicrophoneStarted;
    private _isDeviceStarting;
    private _isDeviceTesting;
    private _micTrack?;
    private _deviceContxt;
    private _isProcessing;
    private _volumeTask?;
    private _volumeInterval;
    private _audioRawDataConfig?;
    private _audioRawDataTrack?;
    private _volume?;
    private _localTrackObservable;
    private _deviceManagerObservable;
    constructor(_deviceId: string, _deviceManager: AgoraRtcDeviceManager, _extensionDelegate: AgoraWebRtcExtensionDelegate, isKeepRecording: boolean, _effectState: AgoraEffectState);
    get audioTrack(): ILocalAudioTrack | undefined;
    get deviceId(): string;
    get isStarted(): boolean;
    get audioDeviceContext(): AgoraRtcAudioEffectContext;
    release(): void;
    start(): void;
    stop(): void;
    startTest(): void;
    stopTest(): void;
    setKeepRecording(keepRecording: boolean): void;
    setVolumeInterval(interval: number): void;
    enableVolumeIndicator(): void;
    disableVolumeIndicator(): void;
    setAudioRawDataConfig(config: AgoraRtcAudioRawDataConfig): void;
    enableAudioRawDataObserver(): void;
    disableAudioRawDataObserver(): void;
    setVolume(volume: number): void;
    private _setAudioRawDataCallback;
    private _unsetAudioRawDataCallback;
    private _handleAudioFrameCallback;
    private _updateVolume;
    private _startVolumePolling;
    private _stopVolumePolling;
    private _isStateStale;
    private _syncState;
    private _openDevice;
    private _releasePreprocessor;
    private _closeDevice;
    private _initPreprocessor;
}