src/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 EnumerateDevices0_2(PP_Resource* devices,
  41                               scoped_refptr<TrackedCallback> callback);
  42   int32_t EnumerateDevices(const PP_ArrayOutput& output,
  43                            scoped_refptr<TrackedCallback> callback);
  44   int32_t EnumerateDevicesSync(const PP_ArrayOutput& output);
  45   int32_t MonitorDeviceChange(PP_MonitorDeviceChangeCallback callback,
  46                               void* user_data);
  47
  48   // Returns true if the message has been handled.
  49   bool HandleReply(const ResourceMessageReplyParams& params,
  50                    const IPC::Message& msg);
  51
  52   void LastPluginRefWasDeleted();
  53
  54  private:
  55   void OnPluginMsgEnumerateDevicesReply0_2(
  56       PP_Resource* devices_resource,
  57       scoped_refptr<TrackedCallback> callback,
  58       const ResourceMessageReplyParams& params,
  59       const std::vector<DeviceRefData>& devices);
  60   void OnPluginMsgEnumerateDevicesReply(
  61       const PP_ArrayOutput& output,
  62       scoped_refptr<TrackedCallback> callback,
  63       const ResourceMessageReplyParams& params,
  64       const std::vector<DeviceRefData>& devices);
  65   void OnPluginMsgNotifyDeviceChange(const ResourceMessageReplyParams& params,
  66                                      uint32_t callback_id,
  67                                      const std::vector<DeviceRefData>& devices);
  68
  69   int32_t WriteToArrayOutput(const std::vector<DeviceRefData>& devices,
  70                              const PP_ArrayOutput& output);
  71
  72   // Not owned by this object.
  73   PluginResource* owner_;
  74
  75   bool pending_enumerate_devices_;
  76
  77   uint32_t monitor_callback_id_;
  78   scoped_ptr<ThreadAwareCallback<PP_MonitorDeviceChangeCallback> >
  79       monitor_callback_;
  80   void* monitor_user_data_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(DeviceEnumerationResourceHelper);
  83 };
  84
  85 }  // namespace proxy
  86 }  // namespace ppapi
  87
  88 #endif  // PPAPI_PROXY_DEVICE_ENUMERATION_RESOURCE_HELPER_H_