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// Copyright 2019 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 UI_BASE_WIN_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_SERVICE_H_
#define UI_BASE_WIN_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_SERVICE_H_
#include <windows.media.control.h>
#include "base/component_export.h"
#include "base/strings/string16.h"
#include "third_party/skia/include/core/SkBitmap.h"
namespace system_media_controls {
class SystemMediaControlsServiceObserver;
// The SystemMediaControlsService connects with Windows's System Media Transport
// Controls, receives media key events, and propagates those events to listening
// SystemMediaControlsServiceObservers. The SystemMediaControlsService tells the
// System Media Transport Controls which actions are currently available. The
// SystemMediaControlsService is also used to keep the System Media Transport
// Controls informed of the current media playback state and metadata.
class COMPONENT_EXPORT(SYSTEM_MEDIA_CONTROLS) SystemMediaControlsService {
public:
// Returns the singleton instance, creating if necessary. If the
// SystemMediaControlsService fails to connect to the
// SystemMediaTransportControls, this returns null.
static SystemMediaControlsService* GetInstance();
virtual void AddObserver(SystemMediaControlsServiceObserver* observer) = 0;
virtual void RemoveObserver(SystemMediaControlsServiceObserver* observer) = 0;
// Enables/disables the service.
virtual void SetEnabled(bool enabled) = 0;
// TODO(steimel): Add other controls.
// Enable or disable specific controls.
virtual void SetIsNextEnabled(bool value) = 0;
virtual void SetIsPreviousEnabled(bool value) = 0;
virtual void SetIsPlayEnabled(bool value) = 0;
virtual void SetIsPauseEnabled(bool value) = 0;
virtual void SetIsStopEnabled(bool value) = 0;
// Setters for metadata.
virtual void SetPlaybackStatus(
ABI::Windows::Media::MediaPlaybackStatus status) = 0;
virtual void SetTitle(const base::string16& title) = 0;
virtual void SetArtist(const base::string16& artist) = 0;
virtual void SetThumbnail(const SkBitmap& bitmap) = 0;
// Helpers for metadata.
virtual void ClearThumbnail() = 0;
virtual void ClearMetadata() = 0;
virtual void UpdateDisplay() = 0;
protected:
virtual ~SystemMediaControlsService();
};
} // namespace system_media_controls
#endif // UI_BASE_WIN_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_SERVICE_H_