import { IAudioFrameObserver, IVideoFrameObserver, IVideoEncodedFrameObserver, MediaSourceType, AudioFrame, ExternalVideoSourceType, ExternalVideoFrame } from './AgoraMediaBase';
import { SenderOptions, EncodedVideoFrameInfo } from './AgoraBase';
/**
 * @ignore
 */
export declare enum AudioMixingDualMonoMode {
    /**
     * @ignore
     */
    AudioMixingDualMonoAuto = 0,
    /**
     * @ignore
     */
    AudioMixingDualMonoL = 1,
    /**
     * @ignore
     */
    AudioMixingDualMonoR = 2,
    /**
     * @ignore
     */
    AudioMixingDualMonoMix = 3
}
/**
 * @ignore
 */
export declare abstract class IMediaEngine {
    /**
     * @ignore
     */
    abstract registerAudioFrameObserver(observer: IAudioFrameObserver): number;
    /**
     * @ignore
     */
    abstract registerVideoFrameObserver(observer: IVideoFrameObserver): number;
    /**
     * @ignore
     */
    abstract registerVideoEncodedFrameObserver(observer: IVideoEncodedFrameObserver): number;
    /**
     * @ignore
     */
    abstract pushAudioFrame(type: MediaSourceType, frame: AudioFrame, wrap?: boolean, sourceId?: number): number;
    /**
     * @ignore
     */
    abstract pushCaptureAudioFrame(frame: AudioFrame): number;
    /**
     * @ignore
     */
    abstract pushReverseAudioFrame(frame: AudioFrame): number;
    /**
     * @ignore
     */
    abstract pushDirectAudioFrame(frame: AudioFrame): number;
    /**
     * @ignore
     */
    abstract pullAudioFrame(): AudioFrame;
    /**
     * @ignore
     */
    abstract setExternalVideoSource(enabled: boolean, useTexture: boolean, sourceType?: ExternalVideoSourceType, encodedVideoOption?: SenderOptions): number;
    /**
     * @ignore
     */
    abstract setExternalAudioSource(enabled: boolean, sampleRate: number, channels: number, sourceNumber?: number, localPlayback?: boolean, publish?: boolean): number;
    /**
     * @ignore
     */
    abstract setExternalAudioSink(enabled: boolean, sampleRate: number, channels: number): number;
    /**
     * @ignore
     */
    abstract enableCustomAudioLocalPlayback(sourceId: number, enabled: boolean): number;
    /**
     * @ignore
     */
    abstract setDirectExternalAudioSource(enable: boolean, localPlayback?: boolean): number;
    /**
     * @ignore
     */
    abstract pushVideoFrame(frame: ExternalVideoFrame, videoTrackId?: number): number;
    /**
     * @ignore
     */
    abstract pushEncodedVideoImage(imageBuffer: Uint8Array, length: number, videoEncodedFrameInfo: EncodedVideoFrameInfo, videoTrackId?: number): number;
    /**
     * @ignore
     */
    abstract release(): void;
    /**
     * @ignore
     */
    abstract unregisterAudioFrameObserver(observer: IAudioFrameObserver): number;
    /**
     * @ignore
     */
    abstract unregisterVideoFrameObserver(observer: IVideoFrameObserver): number;
    /**
     * @ignore
     */
    abstract unregisterVideoEncodedFrameObserver(observer: IVideoEncodedFrameObserver): number;
}