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content / browser / media / active_media_session_controller.h [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_MEDIA_ACTIVE_MEDIA_SESSION_CONTROLLER_H_
#define CONTENT_BROWSER_MEDIA_ACTIVE_MEDIA_SESSION_CONTROLLER_H_
#include <optional>
#include <utility>
#include <vector>
#include "base/containers/flat_set.h"
#include "base/unguessable_token.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/media_session/public/mojom/media_controller.mojom.h"
#include "ui/base/accelerators/media_keys_listener.h"
#include "ui/events/keycodes/keyboard_codes.h"
namespace content {
// Intakes media events (such as media key presses) and controls the active
// media session.
// TODO(crbug.com/40943396) Consider renaming this class in the world of
// instanced system media controls.
class CONTENT_EXPORT ActiveMediaSessionController
: public media_session::mojom::MediaControllerObserver,
public ui::MediaKeysListener::Delegate {
public:
explicit ActiveMediaSessionController(base::UnguessableToken request_id);
ActiveMediaSessionController(const ActiveMediaSessionController&) = delete;
ActiveMediaSessionController& operator=(const ActiveMediaSessionController&) =
delete;
~ActiveMediaSessionController() override;
// media_session::mojom::MediaControllerObserver:
void MediaSessionInfoChanged(
media_session::mojom::MediaSessionInfoPtr session_info) override;
void MediaSessionMetadataChanged(
const std::optional<media_session::MediaMetadata>& metadata) override {}
void MediaSessionActionsChanged(
const std::vector<media_session::mojom::MediaSessionAction>& actions)
override;
void MediaSessionChanged(
const std::optional<base::UnguessableToken>& request_id) override {}
void MediaSessionPositionChanged(
const std::optional<media_session::MediaPosition>& position) override;
// ui::MediaKeysListener::Delegate:
void OnMediaKeysAccelerator(const ui::Accelerator& accelerator) override;
// Receives events from the SystemMediaControls.
void OnNext();
void OnPrevious();
void OnPlay();
void OnPause();
void OnPlayPause();
void OnStop();
void OnSeek(const base::TimeDelta& time);
void OnSeekTo(const base::TimeDelta& time);
void FlushForTesting();
void SetMediaControllerForTesting(
mojo::Remote<media_session::mojom::MediaController> controller) {
media_controller_remote_ = std::move(controller);
}
private:
// Used for converting between MediaSessionAction and KeyboardCode.
media_session::mojom::MediaSessionAction KeyCodeToMediaSessionAction(
ui::KeyboardCode key_code) const;
// Returns nullopt if the action is not supported via hardware keys (e.g.
// SeekBackward).
std::optional<ui::KeyboardCode> MediaSessionActionToKeyCode(
media_session::mojom::MediaSessionAction action) const;
void MaybePerformAction(media_session::mojom::MediaSessionAction action);
bool SupportsAction(media_session::mojom::MediaSessionAction action) const;
void PerformAction(media_session::mojom::MediaSessionAction action);
mojo::Remote<media_session::mojom::MediaControllerManager>
controller_manager_remote_;
// Used to control the active session.
mojo::Remote<media_session::mojom::MediaController> media_controller_remote_;
// Used to check whether a play/pause key should play or pause (based on
// current playback state).
media_session::mojom::MediaSessionInfoPtr session_info_;
// Used to check which actions are currently supported.
base::flat_set<media_session::mojom::MediaSessionAction> actions_;
// Used to receive updates to the active media controller.
mojo::Receiver<media_session::mojom::MediaControllerObserver>
media_controller_observer_receiver_{this};
// Stores the current playback position.
std::optional<media_session::MediaPosition> position_;
// Stores the media session (if any specific one) this active media session
// controller is associated with. If this is null, this AMSC follows around
// the active media session automatically and will receive events for it.
base::UnguessableToken request_id_;
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_ACTIVE_MEDIA_SESSION_CONTROLLER_H_