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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_TRACK_ID_H_
#define MOZILLA_TRACK_ID_H_

namespace mozilla {

/**
 * Unique ID for track within a StreamTracks. Tracks from different
 * StreamTrackss may have the same ID; this matters when appending
 * StreamTrackss, since tracks with the same ID are matched. Only IDs greater
 * than 0 are allowed.
 */
typedef int32_t TrackID;
const TrackID TRACK_NONE = 0;
const TrackID TRACK_INVALID = -1;
const TrackID TRACK_ANY = -2;

inline bool IsTrackIDExplicit(const TrackID& aId) { return aId > TRACK_NONE; }

}  // namespace mozilla

#endif  // MOZILLA_TRACK_ID_H_