Revert of media: add video capture device for ARC++ camera HAL v3

media/capture/video/chromeos/camera_device_context.h

-// 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_CAMERA_DEVICE_CONTEXT_H_
-#define MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_DEVICE_CONTEXT_H_
-
-#include <memory>
-#include <string>
-
-#include "base/sequence_checker.h"
-#include "media/capture/video/video_capture_device.h"
-
-namespace media {
-
-// A class storing the context of a running CameraDeviceDelegate.
-class CAPTURE_EXPORT CameraDeviceContext {
- public:
-  // The internal state of the running CameraDeviceDelegate.  The state
-  // transition happens when the corresponding methods are called inside
-  // CameraDeviceDelegate.
-  enum class State {
-    // The camera device is completely stopped. This is the initial state, and
-    // is also set in OnClosed().
-    kStopped,
-
-    // The camera device is starting and waiting to be initialized.
-    //
-    // The kStarting state is set in AllocateAndStart().
-    kStarting,
-
-    // The camera device is initialized and can accept stream configuration
-    // requests.
-    //
-    // The state is transitioned to kInitialized through:
-    //
-    //   |hal_delegate_|->GetCameraInfo() -> OnGotCameraInfo() ->
-    //   |hal_delegate_|->OpenDevice() -> OnOpenedDevice() ->
-    //   Initialize() -> OnInitialized()
-    kInitialized,
-
-    // The various capture streams are configured and the camera device is ready
-    // to process capture requests.
-    //
-    // The state is transitioned to kStreamConfigured through:
-    //
-    //   ConfigureStreams() -> OnConfiguredStreams()
-    kStreamConfigured,
-
-    // The camera device is capturing video streams.
-    //
-    // The state is transitioned to kCapturing through:
-    //
-    //   ConstructDefaultRequestSettings() ->
-    //   OnConstructedDefaultRequestSettings() ->
-    //   |stream_buffer_manager_|->StartCapture()
-    //
-    // In the kCapturing state the |stream_buffer_manager_| runs the capture
-    // loop to send capture requests and process capture results.
-    kCapturing,
-
-    // When the camera device is in the kCapturing state, a capture loop is
-    // constantly running in |stream_buffer_manager_|:
-    //
-    // On the StreamBufferManager side, we register and submit a capture
-    // request whenever a free buffer is available:
-    //
-    //   RegisterBuffer() -> OnRegisteredBuffer() ->
-    //   ProcessCaptureRequest() -> OnProcessedCaptureRequest()
-    //
-    // We get various capture metadata and error notifications from the camera
-    // HAL through the following callbacks:
-    //
-    //   ProcessCaptureResult()
-    //   Notify()
-
-    // The camera device is going through the shut down process; in order to
-    // avoid race conditions, no new Mojo messages may be sent to camera HAL in
-    // the kStopping state.
-    //
-    // The kStopping state is set in StopAndDeAllocate().
-    kStopping,
-
-    // The camera device encountered an unrecoverable error and needs to be
-    // StopAndDeAllocate()'d.
-    //
-    // The kError state is set in SetErrorState().
-    kError,
-  };
-
-  explicit CameraDeviceContext(
-      std::unique_ptr<VideoCaptureDevice::Client> client);
-
-  ~CameraDeviceContext();
-
-  void SetState(State state);
-
-  State GetState();
-
-  // Sets state to kError and call |client_->OnError| to tear down the
-  // VideoCaptureDevice.
-  void SetErrorState(const tracked_objects::Location& from_here,
-                     const std::string& reason);
-
-  // Logs |message| to |client_|.
-  void LogToClient(std::string message);
-
-  // Submits the capture data to |client_->OnIncomingCapturedData|.
-  void SubmitCapturedData(const uint8_t* data,
-                          int length,
-                          const VideoCaptureFormat& frame_format,
-                          base::TimeTicks reference_time,
-                          base::TimeDelta timestamp);
-
-  void SetRotation(int rotation);
-
- private:
-  friend class StreamBufferManagerTest;
-
-  SEQUENCE_CHECKER(sequence_checker_);
-
-  // The state the CameraDeviceDelegate currently is in.
-  State state_;
-
-  // Clockwise rotation in degrees. This value should be 0, 90, 180, or 270.
-  int rotation_;
-
-  std::unique_ptr<VideoCaptureDevice::Client> client_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(CameraDeviceContext);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_DEVICE_CONTEXT_CHROMEOS_H_