/**
 * What the runtime needs of the outside world to make a noise – the counterpart of `Input` on the
 * way out. The browser side of it is `viewport/SoundLibrary`; a test (and a run started before
 * anything wired one in) gets `SILENT_AUDIO` and plays to nobody.
 *
 * Files, not asset ids: resolving the id is the `BehaviorSystem`'s job, because it is the one
 * holding the project. Everything below this line only knows bytes and voices.
 */
export interface AudioSink {
  /** Starts one voice. `volume` is final (0–1) and every call overlaps whatever is already playing. */
  play(file: string, volume: number, loop: boolean): void;
  /** Silences every voice of that file; `''` silences all of them. */
  stop(file: string): void;
}

export const SILENT_AUDIO: AudioSink = {
  play: () => {},
  stop: () => {},
};