export declare const REC_AUDIO_ENABLE: (config?: RecordConfig | undefined) => boolean;
export declare const REC_VIDEO_ENABLE: (config?: RecordConfig | undefined) => boolean;
export declare const REC_SCREEN_ENABLE: (config?: RecordConfig | undefined) => boolean;
/**
 * 传输优化模式
 * "motion": 流畅优先，遭遇网络波动时，发送端会降低码率来确保接收端的视频画面不会出现中断和卡顿。
 * "detail": 清晰优先，遭遇网络波动时，可能会采取适当降低帧率等方法，确保清晰的视频画面。
 * 如果不设置，表示浏览器根据自身算法确定模式。
 */
export declare type OptimizationMode = "motion" | "detail";
export interface RecordConfig {
    audio?: {
        enabled: boolean;
        /**
         * track 模式下可以指定 tag
         */
        tag?: string;
        /**
        * 传入 deviceId 代表使用指定的 device 采集
        * device 列表可以使用 deviceManager 来获取
        */
        deviceId?: string;
        /**
         * 自定义 source，传入此配置将不会从麦克风中采集
         * 而是使用提供的 source
         */
        source?: string | File | AudioBuffer;
        bitrate?: number;
        sampleRate?: number;
        sampleSize?: number;
        channelCount?: number;
        autoGainControl?: boolean;
        echoCancellation?: boolean;
        noiseSuppression?: boolean;
    };
    video?: {
        enabled: boolean;
        /**
         * track 模式下可以指定 tag
         */
        tag?: string;
        deviceId?: string;
        frameRate?: number;
        height?: ConstraintNumber;
        width?: ConstraintNumber;
        bitrate?: number;
        facingMode?: ConstrainDOMString;
        optimizationMode?: OptimizationMode;
    };
    screen?: RecordScreenConfig;
}
export interface RecordScreenConfig {
    enabled: boolean;
    /**
     * track 模式下可以指定 tag
     */
    tag?: string;
    width?: ConstraintNumber;
    height?: ConstraintNumber;
    frameRate?: number;
    bitrate?: number;
    source?: "window" | "screen";
    audio?: boolean | any;
    audioTag?: string;
    forceChromePlugin?: boolean;
    optimizationMode?: OptimizationMode;
}
export declare type ConstraintNumber = number | NumberRange;
export interface NumberRange {
    max?: number;
    min?: number;
    exact?: number;
    ideal?: number;
}
/**
 * Note that "display-capture"(code value is 2) is the name for screen display permission,
 * but it is not supported now
 */
export declare enum PermissionNameCode {
    camera = 0,
    microphone = 1
}
export declare type QosPermissionName = keyof typeof PermissionNameCode;
export declare enum PermissionStateCode {
    prompt = 1,
    denied = 2,
    granted = 3
}
export declare type PermissionState = keyof typeof PermissionStateCode;