export interface MSMediaKeyNeededEvent extends Event {
    readonly initData: Uint8Array | null;
}
export interface MSGraphicsTrust {
    readonly constrictionActive: boolean;
    readonly status: string;
}
export interface MSMediaKeys {
    readonly keySystem: string;
    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array | null): MSMediaKeySession;
}
export interface MSMediaKeySession extends EventTarget {
    readonly error: MSMediaKeyError | null;
    readonly keySystem: string;
    readonly sessionId: string;
    close(): void;
    update(key: Uint8Array): void;
}
export interface MSMediaKeyError {
    readonly code: number;
    readonly systemCode: number;
    readonly MS_MEDIA_KEYERR_CLIENT: number;
    readonly MS_MEDIA_KEYERR_DOMAIN: number;
    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
    readonly MS_MEDIA_KEYERR_OUTPUT: number;
    readonly MS_MEDIA_KEYERR_SERVICE: number;
    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
}