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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BASE_PLAYER_TRACKER_H_
#define MEDIA_BASE_PLAYER_TRACKER_H_
#include "base/callback.h"
#include "base/macros.h"
#include "media/base/media_export.h"
namespace media {
// An interface for players to register to be notified when a new decryption key
// becomes available or when the CDM is unset.
class MEDIA_EXPORT PlayerTracker {
public:
virtual ~PlayerTracker();
// Registers player callbacks with the CDM.
// - |new_key_cb| is fired when a new decryption key becomes available.
// - |cdm_unset_cb| is fired when the CDM is detached from the player. The
// player should stop using the CDM and release any ref-count to the CDM.
// Returns a registration ID which can be used to unregister a player.
virtual int RegisterPlayer(const base::Closure& new_key_cb,
const base::Closure& cdm_unset_cb) = 0;
// Unregisters a previously registered player. This should be called when
// the CDM is detached from the player (e.g. setMediaKeys(0)), or when the
// player is destroyed.
virtual void UnregisterPlayer(int registration_id) = 0;
protected:
PlayerTracker();
private:
DISALLOW_COPY_AND_ASSIGN(PlayerTracker);
};
} // namespace media
#endif // MEDIA_BASE_PLAYER_TRACKER_H_
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