Pepper: add Image Capture interfaces.

ppapi/cpp/private/camera_capabilities_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_CAMERA_CAPABILITIES_PRIVATE_H_
+#define PPAPI_CPP_PRIVATE_CAMERA_CAPABILITIES_PRIVATE_H_
+
+#include "ppapi/c/private/ppb_camera_capabilities_private.h"
+#include "ppapi/cpp/resource.h"
+#include "ppapi/cpp/size.h"
+
+/// @file
+/// This file defines the CameraCapabilities_Private interface for
+/// establishing an image capture configuration resource within the browser.
+namespace pp {
+
+/// The <code>CameraCapabilities_Private</code> interface contains methods for
+/// getting the image capture capabilities within the browser.
+class CameraCapabilities_Private : public Resource {
+ public:
+  /// Default constructor for creating an is_null()
+  /// <code>CameraCapabilities_Private</code> object.
+  CameraCapabilities_Private();
+
+  /// The copy constructor for <code>CameraCapabilities_Private</code>.
+  ///
+  /// @param[in] other A reference to a <code>CameraCapabilities_Private
+  /// </code>.
+  CameraCapabilities_Private(const CameraCapabilities_Private& other);
+
+  /// Constructs a <code>CameraCapabilities_Private</code> from a <code>
+  /// Resource</code>.
+  ///
+  /// @param[in] resource A <code>PPB_CameraCapabilities_Private</code>
+  /// resource.
+  explicit CameraCapabilities_Private(const Resource& resource);
+
+  /// Constructs a <code>CameraCapabilities_Private</code> that outputs given
+  /// frames to a new video track, which will be consumed by Javascript.

[Justin Chuang, 2014/08/14 16:33:44]

Wrong comments.

[wuchengli, 2014/08/15 08:18:00]

Done.

+  explicit CameraCapabilities_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>PPB_CameraCapabilities_Private</code>
+  /// resource.
+  CameraCapabilities_Private(PassRef, PP_Resource resource);
+
+  // Destructor.
+  ~CameraCapabilities_Private();
+
+  /// GetSupportedPreviewSizes() returns the supported preview sizes for the
+  /// given <code>CameraCapabilities_Private</code>.
+  ///
+  /// @param[in] capabilities A <code>Resource</code> corresponding to an
+  /// image capture capabilities resource.

[Justin Chuang, 2014/08/14 16:33:44]

remove this @param

[wuchengli, 2014/08/15 08:18:00]

Done.

+  /// @param[out] array_size The size of preview size array.
+  /// @param[out] An array of <code>PP_Size</code> corresponding to the
+  /// supported preview sizes in pixels. The ownership of the array belongs to
+  /// <code>CameraCapabilities_Private</code> and the caller should not
+  /// free it. When a CameraCapabilities_Private is deleted, the array
+  /// returning from this is no longer valid.
+  void GetSupportedPreviewSizes(int32_t* array_size, Size** preview_sizes);

[Justin Chuang, 2014/08/14 16:33:44]

Not sure if it's better to replace both args with a "std::vector<Size>*
preview_sizes"? It's more C++. 

With the current prototype, you still need to allocate an array of Size, can't
directly copy the pointer to PP_Size from C layer. So either way, the costs are
the same.

[wuchengli, 2014/08/15 08:18:00]

Good suggestion. Done.

+
+  /// GetSupportedJpegSize() returns the supported JPEG sizes for the given
+  /// <code>CameraCapabilities_Private</code>.
+  ///
+  /// @param[in] capabilities A <code>Resource</code> corresponding to an
+  /// image capture capabilities resource.

[Justin Chuang, 2014/08/14 16:33:44]

ditto, redundant @param

[wuchengli, 2014/08/15 08:18:00]

Done.

+  /// @param[out] array_size The size of preview size array.
+  /// @param[out] An array of <code>PP_Size</code> corresponding to the
+  /// supported JPEG image sizes in pixels. The ownership of the array
+  /// belongs to <code>CameraCapabilities_Private</code> and the caller should
+  /// not free it. When a CameraCapabilities_Private is deleted, the array
+  /// returning from this is no longer valid.
+  void GetSupportedJpegSizes(int32_t* array_size, Size** jpeg_sizes);

[Justin Chuang, 2014/08/14 16:33:44]

Ditto

[wuchengli, 2014/08/15 08:18:00]

Done.

+
+  /// IsCameraCapabilities() determines if the given resource is a
+  /// <code>CameraCapabilities_Private</code>.
+  ///
+  /// @param[in] resource A <code>Resource</code> corresponding to an image
+  /// capture capabilities resource.
+  ///
+  /// @return True if the given resource is an <code>
+  /// CameraCapabilities_Private</code> resource, otherwise false.

[Justin Chuang, 2014/08/14 16:33:44]

s/True/true/  (for C++ keyword)

[wuchengli, 2014/08/15 08:18:00]

Done. Some ppapi classes use True and some use true. The classes that use true
are more.

+  static bool IsCameraCapabilities(const Resource& resource);
+};
+
+}  // namespace pp
+
+#endif  /* PPAPI_CPP_PRIVATE_CAMERA_CAPABILITIES_PRIVATE_H_ */
+