Refactor video capture to new design

ppapi/shared_impl/ppb_video_capture_shared.h

-// Copyright (c) 2012 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 PPAPI_SHARED_IMPL_PPB_VIDEO_CAPTURE_SHARED_H_
-#define PPAPI_SHARED_IMPL_PPB_VIDEO_CAPTURE_SHARED_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "ppapi/shared_impl/ppapi_shared_export.h"
-#include "ppapi/shared_impl/resource.h"
-#include "ppapi/shared_impl/tracked_callback.h"
-#include "ppapi/thunk/ppb_video_capture_api.h"
-
-namespace ppapi {
-
-class PPAPI_SHARED_EXPORT PPB_VideoCapture_Shared
-    : public Resource,
-      NON_EXPORTED_BASE(public thunk::PPB_VideoCapture_API) {
- public:
-  explicit PPB_VideoCapture_Shared(PP_Instance instance);
-  explicit PPB_VideoCapture_Shared(const HostResource& host_resource);
-  virtual ~PPB_VideoCapture_Shared();
-
-  // Resource implementation.
-  virtual thunk::PPB_VideoCapture_API* AsPPB_VideoCapture_API() OVERRIDE;
-
-  // PPB_VideoCapture_API implementation.
-  virtual int32_t EnumerateDevices(
-      PP_Resource* devices,
-      scoped_refptr<TrackedCallback> callback) OVERRIDE;
-  virtual int32_t Open(const std::string& device_id,
-                       const PP_VideoCaptureDeviceInfo_Dev& requested_info,
-                       uint32_t buffer_count,
-                       scoped_refptr<TrackedCallback> callback) OVERRIDE;
-  virtual int32_t StartCapture() OVERRIDE;
-  virtual int32_t ReuseBuffer(uint32_t buffer) OVERRIDE;
-  virtual int32_t StopCapture() OVERRIDE;
-  virtual void Close() OVERRIDE;
-  virtual int32_t StartCapture0_1(
-      const PP_VideoCaptureDeviceInfo_Dev& requested_info,
-      uint32_t buffer_count) OVERRIDE;
-  virtual const std::vector<DeviceRefData>& GetDeviceRefData() const OVERRIDE;
-
-  void OnEnumerateDevicesComplete(int32_t result,
-                                  const std::vector<DeviceRefData>& devices);
-  void OnOpenComplete(int32_t result);
-
- protected:
-  enum OpenState {
-    BEFORE_OPEN,
-    OPENED,
-    CLOSED
-  };
-
-  // Subclasses should implement these methods to do impl- and proxy-specific
-  // work.
-  virtual int32_t InternalEnumerateDevices(
-      PP_Resource* devices,
-      scoped_refptr<TrackedCallback> callback) = 0;
-  virtual int32_t InternalOpen(
-      const std::string& device_id,
-      const PP_VideoCaptureDeviceInfo_Dev& requested_info,
-      uint32_t buffer_count,
-      scoped_refptr<TrackedCallback> callback) = 0;
-  virtual int32_t InternalStartCapture() = 0;
-  virtual int32_t InternalReuseBuffer(uint32_t buffer) = 0;
-  virtual int32_t InternalStopCapture() = 0;
-  virtual void InternalClose() = 0;
-  virtual int32_t InternalStartCapture0_1(
-      const PP_VideoCaptureDeviceInfo_Dev& requested_info,
-      uint32_t buffer_count) = 0;
-  virtual const std::vector<DeviceRefData>& InternalGetDeviceRefData(
-      ) const = 0;
-
-  // Checks whether |status| is expected and sets |status_| if yes. If |forced|
-  // is set to true, this method will bypass sanity check and always set
-  // |status_|.
-  bool SetStatus(PP_VideoCaptureStatus_Dev status, bool forced);
-
-  OpenState open_state_;
-  PP_VideoCaptureStatus_Dev status_;
-
-  scoped_refptr<TrackedCallback> enumerate_devices_callback_;
-  scoped_refptr<TrackedCallback> open_callback_;
-
-  // Output parameter of EnumerateDevices(). It should not be accessed after
-  // |enumerate_devices_callback_| is run.
-  PP_Resource* devices_;
-
-  ResourceObjectType resource_object_type_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(PPB_VideoCapture_Shared);
-};
-
-}  // namespace ppapi
-
-#endif  // PPAPI_SHARED_IMPL_PPB_VIDEO_CAPTURE_SHARED_H_