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