/* 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 DOM_MEDIA_MEDIACONTROL_AUDIOFOCUSMANAGER_H_
#define DOM_MEDIA_MEDIACONTROL_AUDIOFOCUSMANAGER_H_
#include "base/basictypes.h"
#include "nsTArray.h"
#include "VideoUtils.h"
namespace mozilla::dom {
class IMediaController;
class MediaControlService;
/**
* AudioFocusManager is used to assign the audio focus to different requester
* and decide which requester can own audio focus when audio competing happens.
* When the audio competing happens, the last request would be a winner who can
* still own the audio focus, and all the other requesters would lose the audio
* focus. Now MediaController is the onlt requester, it would request the audio
* focus when it becomes audible and revoke the audio focus when the controller
* is no longer active.
*/
class AudioFocusManager {
public:
void RequestAudioFocus(IMediaController* aController);
void RevokeAudioFocus(IMediaController* aController);
explicit AudioFocusManager() =
default;
~AudioFocusManager() =
default;
uint32_t GetAudioFocusNums()
const;
private:
friend class MediaControlService;
void ClearFocusControllersIfNeeded();
nsTArray<RefPtr<IMediaController>> mOwningFocusControllers;
};
}
// namespace mozilla::dom
#endif // DOM_MEDIA_MEDIACONTROL_AUDIOFOCUSMANAGER_H_
