PPAPI: implement GetSupportedPreviewSizes

ppapi/cpp/private/image_capture_private.h

 /* Copyright 2014 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_CPP_PRIVATE_IMAGE_CAPTURE_PRIVATE_H_
 #define PPAPI_CPP_PRIVATE_IMAGE_CAPTURE_PRIVATE_H_
 
 #include "ppapi/c/private/ppb_image_capture_private.h"
-#include "ppapi/cpp/completion_callback.h"
-#include "ppapi/cpp/private/camera_capabilities_private.h"
 #include "ppapi/cpp/resource.h"
 #include "ppapi/cpp/var.h"
 
 /// @file
 /// Defines the <code>ImageCapture_Private</code> interface. Used for
 /// acquiring a single still image from a camera source.
 namespace pp {
 
+class CameraCapabilities_Private;
+class CompletionCallback;
+class InstanceHandle;
+
+template <typename T>
+class CompletionCallbackWithOutput;
+
 /// To query camera capabilities:
-/// 1. Get a PPB_ImageCapture_Private object by Create().
+/// 1. Create an ImageCapture_Private object.
 /// 2. Open() camera device with track id of MediaStream video track.
 /// 3. Call GetCameraCapabilities() to get a
-///    <code>PPB_CameraCapabilities_Private</code> object, which can be used to
+///    <code>CameraCapabilities_Private</code> object, which can be used to
 ///    query camera capabilities.
-class ImageCapture_Private {
+class ImageCapture_Private : public Resource {
  public:
   /// Default constructor for creating an is_null()
   /// <code>ImageCapture_Private</code> object.
   ImageCapture_Private();
 
-  /// Creates an ImageCapture_Private resource.
+  /// The copy constructor for <code>ImageCapture_Private</code>.
+  ///
+  /// @param[in] other A reference to a <code>ImageCapture_Private</code>.
+  ImageCapture_Private(const ImageCapture_Private& other);
+
+  /// Constructs an <code>ImageCapture_Private</code> from
+  /// a <code>Resource</code>.
+  ///
+  /// @param[in] resource A <code>PPB_ImageCapture_Private</code> resource.
+  explicit ImageCapture_Private(const Resource& resource);
+
+  /// Constructs an ImageCapture_Private resource.
   ///
   /// @param[in] instance A <code>PP_Instance</code> identifying one instance
   /// of a module.
-  /// @param[in] camera_source_id A <code>Var</code> identifying a camera
-  /// source. The type is string. The ID can be obtained from
-  /// MediaStreamTrack.getSources() or MediaStreamVideoTrack.id. If a
-  /// MediaStreamVideoTrack is associated with the same source and the track
-  /// is closed, this ImageCapture_Private object can still do image capture.
-  /// @param[in] error_callback A <code>ImageCapture_Private_ErrorCallback
-  /// </code> callback to indicate the image capture has failed.
-  /// @param[inout] user_data An opaque pointer that will be passed to the
-  /// callbacks of ImageCapture_Private.
-  ImageCapture_Private(const InstanceHandle& instance,
-                       const Var& camera_source_id,
-                       void* user_data);
-
-  /// Constructs a <code>ImageCapture_Private</code> from a <code>
-  /// Resource</code>.
-  ///
-  /// @param[in] resource A <code>ImageCapture_Private</code>
-  /// resource.
-  explicit ImageCapture_Private(const Resource& resource);
+  explicit ImageCapture_Private(const InstanceHandle& instance);
 
   /// A constructor used when you have received a <code>PP_Resource</code> as a
   /// return value that has had 1 ref added for you.
   ///
-  /// @param[in] resource A <code>ImageCapture_Private</code>
-  /// resource.
+  /// @param[in] resource A <code>PPB_ImageCapture_Private</code> resource.
   ImageCapture_Private(PassRef, PP_Resource resource);
 
   // Destructor.
   ~ImageCapture_Private();
 
+  /// Opens a video capture device.
+  ///
+  /// @param[in] device_id A <code>Var</code> identifying a camera
+  /// device. The type is string. The ID can be obtained from
+  /// MediaStreamTrack.getSources() or MediaStreamVideoTrack.id.
+  /// @param[in] callback A <code>CompletionCallback</code> to be called upon
+  /// completion of <code>Open()</code>.
+  ///
+  /// @return An int32_t containing a result code from <code>pp_errors.h</code>.
+  int32_t Open(const Var& device_id, const CompletionCallback& callback);
+
   /// Disconnects from the camera and cancels all pending capture requests.
   /// After this returns, no callbacks will be called. If <code>
   /// ImageCapture_Private</code> is destroyed and is not closed yet, this
   /// function will be automatically called. Calling this more than once has no
   /// effect.
-  ///
-  /// @param[in] callback <code>CompletionCallback</code> to be called upon
-  /// completion of <code>Close()</code>.
-  ///
-  /// @return An int32_t containing a result code from <code>pp_errors.h</code>.
-  int32_t Close(const CompletionCallback& callback);
+  void Close();
 
   /// Gets the camera capabilities.
   ///
   /// The camera capabilities do not change for a given camera source.
   ///
   /// @param[in] callback A <code>CompletionCallbackWithOutput</code>
   /// to be called upon completion.
   ///
   /// @return An int32_t containing a result code from <code>pp_errors.h</code>.
   int32_t GetCameraCapabilities(
       const CompletionCallbackWithOutput<CameraCapabilities_Private>& callback);
 
   /// Determines if a resource is an image capture resource.
   ///
   /// @param[in] resource The <code>Resource</code> to test.
   ///
   /// @return true if the given resource is an image capture resource or false
   /// otherwise.
   static bool IsImageCapture(const Resource& resource);
 };
 
 } // namespace pp
 
 #endif  /* PPAPI_CPP_PRIVATE_IMAGE_CAPTURE_PRIVATE_H_ */
-