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// Copyright 2017 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_CAPTURE_VIDEO_CHROMEOS_VIDEO_CAPTURE_DEVICE_CHROMEOS_HALV3_H_
#define MEDIA_CAPTURE_VIDEO_CHROMEOS_VIDEO_CAPTURE_DEVICE_CHROMEOS_HALV3_H_
#include <memory>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread.h"
#include "chromeos/dbus/power_manager_client.h"
#include "media/capture/video/chromeos/display_rotation_observer.h"
#include "media/capture/video/video_capture_device.h"
#include "media/capture/video/video_capture_device_descriptor.h"
#include "media/capture/video_capture_types.h"
namespace display {
class Display;
} // namespace display
namespace media {
class CameraHalDelegate;
class CameraDeviceContext;
class CameraDeviceDelegate;
// Implementation of VideoCaptureDevice for ChromeOS with CrOS camera HALv3.
class CAPTURE_EXPORT VideoCaptureDeviceChromeOSHalv3 final
: public VideoCaptureDevice,
public DisplayRotationObserver,
public chromeos::PowerManagerClient::Observer {
public:
VideoCaptureDeviceChromeOSHalv3(
scoped_refptr<base::SingleThreadTaskRunner>
task_runner_for_screen_observer,
const VideoCaptureDeviceDescriptor& device_descriptor,
scoped_refptr<CameraHalDelegate> camera_hal_delegate);
~VideoCaptureDeviceChromeOSHalv3() final;
// VideoCaptureDevice implementation.
void AllocateAndStart(const VideoCaptureParams& params,
std::unique_ptr<Client> client) final;
void StopAndDeAllocate() final;
void TakePhoto(TakePhotoCallback callback) final;
void GetPhotoState(GetPhotoStateCallback callback) final;
void SetPhotoOptions(mojom::PhotoSettingsPtr settings,
SetPhotoOptionsCallback callback) final;
// chromeos::PowerManagerClient::Observer callbacks for system suspend and
// resume events.
void SuspendImminent(power_manager::SuspendImminent::Reason reason) final;
void SuspendDone(const base::TimeDelta& sleep_duration) final;
private:
void OpenDevice();
void CloseDevice(base::OnceClosure callback);
// DisplayRotationDelegate implementation.
void SetDisplayRotation(const display::Display& display) final;
void SetRotation(int rotation);
const VideoCaptureDeviceDescriptor device_descriptor_;
// A reference to the CameraHalDelegate instance in the VCD factory. This is
// used by AllocateAndStart to query camera info and create the camera device.
const scoped_refptr<CameraHalDelegate> camera_hal_delegate_;
// A reference to the thread that all the VideoCaptureDevice interface methods
// are expected to be called on.
const scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_;
// The thread that all the Mojo operations of |camera_device_delegate_| take
// place. Started in AllocateAndStart and stopped in StopAndDeAllocate, where
// the access to the base::Thread methods are sequenced on
// |capture_task_runner_|.
base::Thread camera_device_ipc_thread_;
VideoCaptureParams capture_params_;
// |device_context_| is created and owned by VideoCaptureDeviceChromeOSHalv3
// and is only accessed by |camera_device_delegate_|.
std::unique_ptr<CameraDeviceContext> device_context_;
// Internal delegate doing the actual capture setting, buffer allocation and
// circulation with the camera HAL. Created in AllocateAndStart and deleted in
// StopAndDeAllocate on |capture_task_runner_|. All methods of
// |camera_device_delegate_| operate on |camera_device_ipc_thread_|.
std::unique_ptr<CameraDeviceDelegate> camera_device_delegate_;
scoped_refptr<ScreenObserverDelegate> screen_observer_delegate_;
const VideoFacingMode lens_facing_;
const int camera_orientation_;
// Whether the incoming frames should rotate when the device rotates.
const bool rotates_with_device_;
int rotation_;
base::WeakPtrFactory<VideoCaptureDeviceChromeOSHalv3> weak_ptr_factory_;
DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceChromeOSHalv3);
};
} // namespace media
#endif // MEDIA_CAPTURE_VIDEO_CHROMEOS_VIDEO_CAPTURE_DEVICE_CHROMEOS_HALV3_H_