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
  16 namespace IPC {
  17 class Message;
  18 }
  19
  20 struct PP_ArrayOutput;
  21
  22 namespace ppapi {
  23
  24 struct DeviceRefData;
  25 class TrackedCallback;
  26
  27 namespace proxy {
  28
  29 class PluginResource;
  30 class ResourceMessageReplyParams;
  31
  32 class PPAPI_PROXY_EXPORT DeviceEnumerationResourceHelper
  33     : public base::SupportsWeakPtr<DeviceEnumerationResourceHelper> {
  34  public:
  35   // |owner| must outlive this object.
  36   explicit DeviceEnumerationResourceHelper(PluginResource* owner);
  37   ~DeviceEnumerationResourceHelper();
  38
  39   int32_t EnumerateDevices0_2(PP_Resource* devices,
  40                               scoped_refptr<TrackedCallback> callback);
  41   int32_t EnumerateDevices(const PP_ArrayOutput& output,
  42                            scoped_refptr<TrackedCallback> callback);
  43   int32_t EnumerateDevicesSync(const PP_ArrayOutput& output);
  44   int32_t MonitorDeviceChange(PP_MonitorDeviceChangeCallback callback,
  45                               void* user_data);
  46
  47   // Returns true if the message has been handled.
  48   bool HandleReply(const ResourceMessageReplyParams& params,
  49                    const IPC::Message& msg);
  50
  51   void LastPluginRefWasDeleted();
  52
  53  private:
  54   void OnPluginMsgEnumerateDevicesReply0_2(
  55       PP_Resource* devices_resource,
  56       scoped_refptr<TrackedCallback> callback,
  57       const ResourceMessageReplyParams& params,
  58       const std::vector<DeviceRefData>& devices);
  59   void OnPluginMsgEnumerateDevicesReply(
  60       const PP_ArrayOutput& output,
  61       scoped_refptr<TrackedCallback> callback,
  62       const ResourceMessageReplyParams& params,
  63       const std::vector<DeviceRefData>& devices);
  64   void OnPluginMsgNotifyDeviceChange(const ResourceMessageReplyParams& params,
  65                                      uint32_t callback_id,
  66                                      const std::vector<DeviceRefData>& devices);
  67
  68   int32_t WriteToArrayOutput(const std::vector<DeviceRefData>& devices,
  69                              const PP_ArrayOutput& output);
  70
  71   // Not owned by this object.
  72   PluginResource* owner_;
  73
  74   bool pending_enumerate_devices_;
  75
  76   uint32_t monitor_callback_id_;
  77   PP_MonitorDeviceChangeCallback monitor_callback_;
  78   void* monitor_user_data_;
  79
  80   DISALLOW_COPY_AND_ASSIGN(DeviceEnumerationResourceHelper);
  81 };
  82
  83 }  // namespace proxy
  84 }  // namespace ppapi
  85
  86 #endif  // PPAPI_PROXY_DEVICE_ENUMERATION_RESOURCE_HELPER_H_