content/browser/gamepad/raw_input_data_fetcher_win.h

   1 // Copyright 2014 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 CONTENT_BROWSER_GAMEPAD_RAW_INPUT_DATA_FETCHER_WIN_H_
   6 #define CONTENT_BROWSER_GAMEPAD_RAW_INPUT_DATA_FETCHER_WIN_H_
   7
   8 #include "build/build_config.h"
   9
  10 #include <stdlib.h>
  11 #include <Unknwn.h>
  12 #include <WinDef.h>
  13 #include <windows.h>
  14
  15 #include <hidsdi.h>
  16 #include <map>
  17 #include <vector>
  18
  19 #include "base/memory/scoped_ptr.h"
  20 #include "base/memory/weak_ptr.h"
  21 #include "base/message_loop/message_loop.h"
  22 #include "base/scoped_native_library.h"
  23 #include "base/win/message_window.h"
  24 #include "content/browser/gamepad/gamepad_data_fetcher.h"
  25 #include "content/browser/gamepad/gamepad_standard_mappings.h"
  26 #include "third_party/WebKit/public/platform/WebGamepads.h"
  27
  28 namespace content {
  29
  30 struct RawGamepadAxis {
  31   HIDP_VALUE_CAPS caps;
  32   float value;
  33   bool active;
  34   unsigned long bitmask;
  35 };
  36
  37 struct RawGamepadInfo {
  38   RawGamepadInfo();
  39   ~RawGamepadInfo();
  40
  41   HANDLE handle;
  42   scoped_ptr<uint8[]> ppd_buffer;
  43   PHIDP_PREPARSED_DATA preparsed_data;
  44
  45   uint32_t report_id;
  46   uint32_t vendor_id;
  47   uint32_t product_id;
  48
  49   wchar_t id[blink::WebGamepad::idLengthCap];
  50
  51   uint32_t buttons_length;
  52   bool buttons[blink::WebGamepad::buttonsLengthCap];
  53
  54   uint32_t axes_length;
  55   RawGamepadAxis axes[blink::WebGamepad::axesLengthCap];
  56 };
  57
  58 class RawInputDataFetcher
  59     : public base::SupportsWeakPtr<RawInputDataFetcher>,
  60       public base::MessageLoop::DestructionObserver {
  61  public:
  62   explicit RawInputDataFetcher();
  63   ~RawInputDataFetcher() override;
  64
  65   // DestructionObserver overrides.
  66   void WillDestroyCurrentMessageLoop() override;
  67
  68   bool Available() { return rawinput_available_; }
  69   void StartMonitor();
  70   void StopMonitor();
  71
  72   std::vector<RawGamepadInfo*> EnumerateDevices();
  73   RawGamepadInfo* GetGamepadInfo(HANDLE handle);
  74
  75  private:
  76   RawGamepadInfo* ParseGamepadInfo(HANDLE hDevice);
  77   void UpdateGamepad(RAWINPUT* input, RawGamepadInfo* gamepad_info);
  78   // Handles WM_INPUT messages.
  79   LRESULT OnInput(HRAWINPUT input_handle);
  80   // Handles messages received by |window_|.
  81   bool HandleMessage(UINT message,
  82                      WPARAM wparam,
  83                      LPARAM lparam,
  84                      LRESULT* result);
  85   RAWINPUTDEVICE* GetRawInputDevices(DWORD flags);
  86   void ClearControllers();
  87
  88   // Function types we use from hid.dll.
  89   typedef NTSTATUS (__stdcall *HidPGetCapsFunc)(
  90       PHIDP_PREPARSED_DATA PreparsedData, PHIDP_CAPS Capabilities);
  91   typedef NTSTATUS (__stdcall *HidPGetButtonCapsFunc)(
  92       HIDP_REPORT_TYPE ReportType, PHIDP_BUTTON_CAPS ButtonCaps,
  93       PUSHORT ButtonCapsLength, PHIDP_PREPARSED_DATA PreparsedData);
  94   typedef NTSTATUS (__stdcall *HidPGetValueCapsFunc)(
  95       HIDP_REPORT_TYPE ReportType, PHIDP_VALUE_CAPS ValueCaps,
  96       PUSHORT ValueCapsLength, PHIDP_PREPARSED_DATA PreparsedData);
  97   typedef NTSTATUS(__stdcall* HidPGetUsagesExFunc)(
  98       HIDP_REPORT_TYPE ReportType,
  99       USHORT LinkCollection,
 100       PUSAGE_AND_PAGE ButtonList,
 101       ULONG* UsageLength,
 102       PHIDP_PREPARSED_DATA PreparsedData,
 103       PCHAR Report,
 104       ULONG ReportLength);
 105   typedef NTSTATUS (__stdcall *HidPGetUsageValueFunc)(
 106       HIDP_REPORT_TYPE ReportType, USAGE UsagePage, USHORT LinkCollection,
 107       USAGE Usage, PULONG UsageValue, PHIDP_PREPARSED_DATA PreparsedData,
 108       PCHAR Report, ULONG ReportLength);
 109   typedef NTSTATUS (__stdcall *HidPGetScaledUsageValueFunc)(
 110       HIDP_REPORT_TYPE ReportType, USAGE UsagePage, USHORT LinkCollection,
 111       USAGE Usage, PLONG UsageValue, PHIDP_PREPARSED_DATA PreparsedData,
 112       PCHAR Report, ULONG ReportLength);
 113   typedef BOOLEAN (__stdcall *HidDGetStringFunc)(
 114       HANDLE HidDeviceObject, PVOID Buffer, ULONG BufferLength);
 115
 116   // Get functions from dynamically loaded hid.dll. Returns true if loading was
 117   // successful.
 118   bool GetHidDllFunctions();
 119
 120   base::ScopedNativeLibrary hid_dll_;
 121   scoped_ptr<base::win::MessageWindow> window_;
 122   bool rawinput_available_;
 123   bool filter_xinput_;
 124   bool events_monitored_;
 125
 126   std::map<HANDLE, RawGamepadInfo*> controllers_;
 127
 128   // Function pointers to HID functionality, retrieved in
 129   // |GetHidDllFunctions|.
 130   HidPGetCapsFunc hidp_get_caps_;
 131   HidPGetButtonCapsFunc hidp_get_button_caps_;
 132   HidPGetValueCapsFunc hidp_get_value_caps_;
 133   HidPGetUsagesExFunc hidp_get_usages_ex_;
 134   HidPGetUsageValueFunc hidp_get_usage_value_;
 135   HidPGetScaledUsageValueFunc hidp_get_scaled_usage_value_;
 136   HidDGetStringFunc hidd_get_product_string_;
 137
 138   DISALLOW_COPY_AND_ASSIGN(RawInputDataFetcher);
 139 };
 140
 141 }  // namespace content
 142
 143 #endif  // CONTENT_BROWSER_GAMEPAD_RAW_INPUT_DATA_FETCHER_WIN_H_