// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://github.com/WICG/web-codecs

[
    SecureContext,
    Exposed=(Window,DedicatedWorker)
] interface ImageTrackList {
  getter ImageTrack([EnforceRange] unsigned long index);
  readonly attribute unsigned long length;

  // Index of the currently selected track or -1 if no track is selected.
  readonly attribute long selectedIndex;

  // Helper accessor for the currently selected track.
  readonly attribute ImageTrack? selectedTrack;

  // Property-based promise for signaling initial metadata readiness (e.g.,
  // track count, animation status, etc).
  [CallWith=ScriptState] readonly attribute Promise<undefined> ready;
};