export const mediaTypes = Object.freeze({
    audio: 1,
    video: 2,
});


export enum KeyboardEventKeys {
    ArrowRight = "ArrowRight",
    ArrowLeft = "ArrowLeft",
    Escape = "Escape",
    Space = "Space",
    Delete = "Delete",
    KeyS = "KeyS",
    Numpad1 = "Numpad1",
    Digit1 = "Digit1",
}



export const mapSupplied = {
    ".aac": { supply: "m4a", type: mediaTypes.audio },
    ".flac": { supply: "mp3", type: mediaTypes.audio },
    ".m4a": { supply: "m4a", type: mediaTypes.audio },
    ".mp3": { supply: "mp3", type: mediaTypes.audio },
    ".oga": { supply: "oga", type: mediaTypes.audio },
    ".ogg": { supply: "oga", type: mediaTypes.audio },
    ".wav": { supply: "wav", type: mediaTypes.audio },

    ".f4v": { supply: "m4v", type: mediaTypes.video },
    ".m4v": { supply: "m4v", type: mediaTypes.video },
    ".mov": { supply: "m4v", type: mediaTypes.video },
    ".mp4": { supply: "m4v", type: mediaTypes.video },
    ".ogv": { supply: "ogv", type: mediaTypes.video },
    ".webm": { supply: "webmv", type: mediaTypes.video },
    ".wmv": { supply: "m4v", type: mediaTypes.video, convertable: true },
    ".avi": { supply: "m4v", type: mediaTypes.video, convertable: true },
    ".mpeg": { supply: "m4v", type: mediaTypes.video, convertable: true },
    ".mpg": { supply: "m4v", type: mediaTypes.video, convertable: true },
} as Record<string, { supply: string, type: number } | undefined>


type NullOrUndefined = null | undefined
export const isNullOrUndefined = (arg: unknown): arg is NullOrUndefined => {
    return arg === undefined || arg === null;
}