ppapi/proxy/device_enumeration_resource_helper.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef PPAPI_PROXY_DEVICE_ENUMERATION_RESOURCE_HELPER_H_
   6 #define PPAPI_PROXY_DEVICE_ENUMERATION_RESOURCE_HELPER_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "ppapi/c/dev/ppb_device_ref_dev.h"
  14 #include "ppapi/proxy/ppapi_proxy_export.h"
  15 #include "ppapi/shared_impl/thread_aware_callback.h"
  16
  17 namespace IPC {
  18 class Message;
  19 }
  20
  21 struct PP_ArrayOutput;
  22
  23 namespace ppapi {
  24
  25 struct DeviceRefData;
  26 class TrackedCallback;
  27
  28 namespace proxy {
  29
  30 class PluginResource;
  31 class ResourceMessageReplyParams;
  32
  33 class PPAPI_PROXY_EXPORT DeviceEnumerationResourceHelper
  34     : public base::SupportsWeakPtr<DeviceEnumerationResourceHelper> {
  35  public:
  36   // |owner| must outlive this object.
  37   explicit DeviceEnumerationResourceHelper(PluginResource* owner);
  38   ~DeviceEnumerationResourceHelper();
  39
  40   int32_t EnumerateDevices(const PP_ArrayOutput& output,
  41                            scoped_refptr<TrackedCallback> callback);
  42   int32_t EnumerateDevicesSync(const PP_ArrayOutput& output);
  43   int32_t MonitorDeviceChange(PP_MonitorDeviceChangeCallback callback,
  44                               void* user_data);
  45
  46   // Returns true if the message has been handled.
  47   bool HandleReply(const ResourceMessageReplyParams& params,
  48                    const IPC::Message& msg);
  49
  50   void LastPluginRefWasDeleted();
  51
  52  private:
  53   void OnPluginMsgEnumerateDevicesReply(
  54       const PP_ArrayOutput& output,
  55       scoped_refptr<TrackedCallback> callback,
  56       const ResourceMessageReplyParams& params,
  57       const std::vector<DeviceRefData>& devices);
  58   void OnPluginMsgNotifyDeviceChange(const ResourceMessageReplyParams& params,
  59                                      uint32_t callback_id,
  60                                      const std::vector<DeviceRefData>& devices);
  61
  62   int32_t WriteToArrayOutput(const std::vector<DeviceRefData>& devices,
  63                              const PP_ArrayOutput& output);
  64
  65   // Not owned by this object.
  66   PluginResource* owner_;
  67
  68   bool pending_enumerate_devices_;
  69
  70   uint32_t monitor_callback_id_;
  71   scoped_ptr<ThreadAwareCallback<PP_MonitorDeviceChangeCallback> >
  72       monitor_callback_;
  73   void* monitor_user_data_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(DeviceEnumerationResourceHelper);
  76 };
  77
  78 }  // namespace proxy
  79 }  // namespace ppapi
  80
  81 #endif  // PPAPI_PROXY_DEVICE_ENUMERATION_RESOURCE_HELPER_H_