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- // Copyright 2018 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 SERVICES_MEDIA_SESSION_MEDIA_CONTROLLER_H_
- #define SERVICES_MEDIA_SESSION_MEDIA_CONTROLLER_H_
- #include <memory>
- #include <utility>
- #include <vector>
- #include "base/containers/flat_map.h"
- #include "base/memory/raw_ptr.h"
- #include "base/sequence_checker.h"
- #include "mojo/public/cpp/bindings/receiver.h"
- #include "mojo/public/cpp/bindings/receiver_set.h"
- #include "mojo/public/cpp/bindings/remote_set.h"
- #include "services/media_session/public/cpp/media_metadata.h"
- #include "services/media_session/public/mojom/media_controller.mojom.h"
- #include "services/media_session/public/mojom/media_session.mojom.h"
- #include "third_party/abseil-cpp/absl/types/optional.h"
- namespace media_session {
- class AudioFocusRequest;
- // MediaController provides a control surface over Mojo for controlling a
- // specific MediaSession. If |session_| is nullptr then all commands will be
- // dropped. MediaController is also a MediaSessionObserver and will forward
- // events to added observers.
- class MediaController : public mojom::MediaController,
- public mojom::MediaSessionObserver {
- public:
- MediaController();
- MediaController(const MediaController&) = delete;
- MediaController& operator=(const MediaController&) = delete;
- ~MediaController() override;
- // mojom::MediaController overrides.
- void Suspend() override;
- void Resume() override;
- void Stop() override;
- void ToggleSuspendResume() override;
- void AddObserver(
- mojo::PendingRemote<mojom::MediaControllerObserver> observer) override;
- void PreviousTrack() override;
- void NextTrack() override;
- void Seek(base::TimeDelta seek_time) override;
- void ObserveImages(mojom::MediaSessionImageType type,
- int minimum_size_px,
- int desired_size_px,
- mojo::PendingRemote<mojom::MediaControllerImageObserver>
- observer) override;
- void SeekTo(base::TimeDelta seek_time) override;
- void ScrubTo(base::TimeDelta seek_time) override;
- void EnterPictureInPicture() override;
- void ExitPictureInPicture() override;
- void SetAudioSinkId(const absl::optional<std::string>& id) override;
- void ToggleMicrophone() override;
- void ToggleCamera() override;
- void HangUp() override;
- void Raise() override;
- void SetMute(bool mute) override;
- // mojom::MediaSessionObserver overrides.
- void MediaSessionInfoChanged(
- mojom::MediaSessionInfoPtr session_info) override;
- void MediaSessionMetadataChanged(
- const absl::optional<MediaMetadata>&) override;
- void MediaSessionActionsChanged(
- const std::vector<mojom::MediaSessionAction>& action) override;
- void MediaSessionImagesChanged(
- const base::flat_map<mojom::MediaSessionImageType,
- std::vector<MediaImage>>& images) override;
- void MediaSessionPositionChanged(
- const absl::optional<media_session::MediaPosition>& position) override;
- void SetMediaSession(AudioFocusRequest* session);
- void ClearMediaSession();
- void BindToInterface(mojo::PendingReceiver<mojom::MediaController> receiver);
- void FlushForTesting();
- private:
- friend class MediaControllerTest;
- class ImageObserverHolder;
- // Removes unbound or faulty image observers.
- void CleanupImageObservers();
- void Reset();
- // Holds mojo bindings for mojom::MediaController.
- mojo::ReceiverSet<mojom::MediaController> receivers_;
- // The current info for the |session_|.
- mojom::MediaSessionInfoPtr session_info_;
- // The current metadata for |session_|.
- absl::optional<MediaMetadata> session_metadata_;
- // The current actions for |session_|.
- std::vector<mojom::MediaSessionAction> session_actions_;
- // The current position for |session_|.
- absl::optional<MediaPosition> session_position_;
- // The current images for |session_|.
- base::flat_map<mojom::MediaSessionImageType, std::vector<MediaImage>>
- session_images_;
- // Raw pointer to the media session we are controlling.
- raw_ptr<AudioFocusRequest> session_ = nullptr;
- // Observers that are observing |this|.
- mojo::RemoteSet<mojom::MediaControllerObserver> observers_;
- // Binding for |this| to act as an observer to |session_|.
- mojo::Receiver<mojom::MediaSessionObserver> session_receiver_{this};
- // Manages individual image observers.
- std::vector<std::unique_ptr<ImageObserverHolder>> image_observers_;
- // Protects |session_| as it is not thread safe.
- SEQUENCE_CHECKER(sequence_checker_);
- };
- } // namespace media_session
- #endif // SERVICES_MEDIA_SESSION_MEDIA_CONTROLLER_H_
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