Change the cpp wrappers of audio input/video capture to use CompletionCallbackWithOutput.

ppapi/cpp/dev/video_capture_dev.cc

 // 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.
 
 #include "ppapi/cpp/dev/video_capture_dev.h"
 
 #include "ppapi/c/dev/ppb_video_capture_dev.h"
 #include "ppapi/c/pp_errors.h"
-#include "ppapi/cpp/completion_callback.h"
-#include "ppapi/cpp/dev/device_ref_dev.h"
 #include "ppapi/cpp/dev/resource_array_dev.h"
 #include "ppapi/cpp/instance_handle.h"
-#include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
 
 namespace pp {
 
 namespace {
 
 template <> const char* interface_name<PPB_VideoCapture_Dev_0_2>() {
   return PPB_VIDEOCAPTURE_DEV_INTERFACE_0_2;
 }
 
 template <> const char* interface_name<PPB_VideoCapture_Dev_0_1>() {
   return PPB_VIDEOCAPTURE_DEV_INTERFACE_0_1;
 }
 
 }  // namespace
 
-struct VideoCapture_Dev::EnumerateDevicesState {
-  EnumerateDevicesState(std::vector<DeviceRef_Dev>* in_devices,
-                        const CompletionCallback& in_callback,
-                        VideoCapture_Dev* in_video_capture)
-      : devices_resource(0),
-        devices(in_devices),
-        callback(in_callback),
-        video_capture(in_video_capture) {
-  }
-
-  PP_Resource devices_resource;
-  std::vector<DeviceRef_Dev>* devices;
-  CompletionCallback callback;
-  VideoCapture_Dev* video_capture;
-};
-
 VideoCapture_Dev::VideoCapture_Dev(const InstanceHandle& instance)
-    : enum_state_(NULL),
-      requested_info_(),
+    : requested_info_(),
       buffer_count_(0) {
   if (has_interface<PPB_VideoCapture_Dev_0_2>()) {
     PassRefFromConstructor(get_interface<PPB_VideoCapture_Dev_0_2>()->Create(
         instance.pp_instance()));
   } else if (has_interface<PPB_VideoCapture_Dev_0_1>()) {
     PassRefFromConstructor(get_interface<PPB_VideoCapture_Dev_0_1>()->Create(
         instance.pp_instance()));
   }
 }
 
 VideoCapture_Dev::VideoCapture_Dev(PP_Resource resource)
     : Resource(resource),
-      enum_state_(NULL),
       requested_info_(),
       buffer_count_(0) {
 }
 
-VideoCapture_Dev::VideoCapture_Dev(const VideoCapture_Dev& other)
-    : Resource(other),
-      enum_state_(NULL),
-      requested_info_(other.requested_info_),
-      buffer_count_(other.buffer_count_) {
-}
-
 VideoCapture_Dev::~VideoCapture_Dev() {
-  AbortEnumerateDevices();
-}
-
-VideoCapture_Dev& VideoCapture_Dev::operator=(
-    const VideoCapture_Dev& other) {
-  AbortEnumerateDevices();
-
-  Resource::operator=(other);
-  requested_info_ = other.requested_info_;
-  buffer_count_ = other.buffer_count_;
-  return *this;
 }
 
 // static
 bool VideoCapture_Dev::IsAvailable() {
   return has_interface<PPB_VideoCapture_Dev_0_2>() ||
          has_interface<PPB_VideoCapture_Dev_0_1>();
 }
 
-int32_t VideoCapture_Dev::EnumerateDevices(std::vector<DeviceRef_Dev>* devices,
-                                           const CompletionCallback& callback) {
+int32_t VideoCapture_Dev::EnumerateDevices(
+    const CompletionCallbackWithOutput<std::vector<DeviceRef_Dev> >& callback) {
   if (!has_interface<PPB_VideoCapture_Dev_0_2>())
     return callback.MayForce(PP_ERROR_NOINTERFACE);
-  if (!devices)
-    return callback.MayForce(PP_ERROR_BADARGUMENT);
   if (!callback.pp_completion_callback().func)
     return callback.MayForce(PP_ERROR_BLOCKS_MAIN_THREAD);
-  if (enum_state_)
-    return callback.MayForce(PP_ERROR_INPROGRESS);
 
-  // It will be deleted in OnEnumerateDevicesComplete().
-  enum_state_ = new EnumerateDevicesState(devices, callback, this);
+  // ArrayOutputCallbackConverter is responsible to delete it.
+  ResourceArray_Dev::ArrayOutputCallbackData* data =
+      new ResourceArray_Dev::ArrayOutputCallbackData(
+          callback.output(), callback.pp_completion_callback());
   return get_interface<PPB_VideoCapture_Dev_0_2>()->EnumerateDevices(
-      pp_resource(), &enum_state_->devices_resource,
-      PP_MakeCompletionCallback(&VideoCapture_Dev::OnEnumerateDevicesComplete,
-                                enum_state_));
+      pp_resource(), &data->resource_array_output,
+      PP_MakeCompletionCallback(
+          &ResourceArray_Dev::ArrayOutputCallbackConverter, data));
 }
 
 int32_t VideoCapture_Dev::Open(
     const DeviceRef_Dev& device_ref,
     const PP_VideoCaptureDeviceInfo_Dev& requested_info,
     uint32_t buffer_count,
     const CompletionCallback& callback) {
   if (has_interface<PPB_VideoCapture_Dev_0_2>()) {
     return get_interface<PPB_VideoCapture_Dev_0_2>()->Open(
         pp_resource(), device_ref.pp_resource(), &requested_info, buffer_count,
@@ skipping 52 matching lines @@
   }
 
   return PP_ERROR_NOINTERFACE;
 }
 
 void VideoCapture_Dev::Close() {
   if (has_interface<PPB_VideoCapture_Dev_0_2>())
     get_interface<PPB_VideoCapture_Dev_0_2>()->Close(pp_resource());
 }
 
-void VideoCapture_Dev::AbortEnumerateDevices() {
-  if (enum_state_) {
-    enum_state_->devices = NULL;
-    Module::Get()->core()->CallOnMainThread(0, enum_state_->callback,
-                                            PP_ERROR_ABORTED);
-    enum_state_->video_capture = NULL;
-    enum_state_ = NULL;
-  }
-}
-
-// static
-void VideoCapture_Dev::OnEnumerateDevicesComplete(void* user_data,
-                                                  int32_t result) {
-  EnumerateDevicesState* enum_state =
-      static_cast<EnumerateDevicesState*>(user_data);
-
-  bool need_to_callback = !!enum_state->video_capture;
-
-  if (result == PP_OK) {
-    // It will take care of releasing the reference.
-    ResourceArray_Dev resources(pp::PASS_REF, enum_state->devices_resource);
-
-    if (need_to_callback) {
-      enum_state->devices->clear();
-      for (uint32_t index = 0; index < resources.size(); ++index) {
-        DeviceRef_Dev device(resources[index]);
-        enum_state->devices->push_back(device);
-      }
-    }
-  }
-
-  if (need_to_callback) {
-    enum_state->video_capture->enum_state_ = NULL;
-    enum_state->callback.Run(result);
-  }
-
-  delete enum_state;
-}
-
 }  // namespace pp