dictionary MediaConfiguration {
  VideoConfiguration video;
  AudioConfiguration audio;
};

dictionary MediaDecodingConfiguration : MediaConfiguration {
  required MediaDecodingType type;
};

dictionary MediaEncodingConfiguration : MediaConfiguration {
  required MediaEncodingType type;
};

enum MediaDecodingType {
  "file",
  "media-source",
};

enum MediaEncodingType {
  "record",
  "transmission"
};

dictionary VideoConfiguration {
  required DOMString contentType;
  required unsigned long width;
  required unsigned long height;
  required unsigned long long bitrate;
  required DOMString framerate;
};

dictionary AudioConfiguration {
  required DOMString contentType;
  DOMString channels;
  unsigned long long bitrate;
  unsigned long samplerate;
};

interface MediaCapabilitiesInfo {
  readonly attribute boolean supported;
  readonly attribute boolean smooth;
  readonly attribute boolean powerEfficient;
};

[Exposed=(Window)]
partial interface Navigator {
  [SameObject] readonly attribute MediaCapabilities mediaCapabilities;
};

[Exposed=(Worker)]
partial interface WorkerNavigator {
  [SameObject] readonly attribute MediaCapabilities mediaCapabilities;
};

[Exposed=(Window, Worker)]
interface MediaCapabilities {
  Promise<MediaCapabilitiesInfo> decodingInfo(MediaDecodingConfiguration configuration);
  Promise<MediaCapabilitiesInfo> encodingInfo(MediaEncodingConfiguration configuration);
};

interface ScreenLuminance {
  readonly attribute double min;
  readonly attribute double max;
  readonly attribute double maxAverage;
};

enum ScreenColorGamut {
  "srgb",
  "p3",
  "rec2020",
};

partial interface Screen {
  readonly attribute ScreenColorGamut colorGamut;
  readonly attribute ScreenLuminance? luminance;

  attribute EventHandler onchange;
};