content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm

   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 #include "content/browser/gamepad/gamepad_platform_data_fetcher_mac.h"
   6
   7 #include "base/mac/foundation_util.h"
   8 #include "base/mac/scoped_nsobject.h"
   9 #include "base/strings/string16.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/time/time.h"
  13
  14 #import <Foundation/Foundation.h>
  15 #include <IOKit/hid/IOHIDKeys.h>
  16
  17 using blink::WebGamepad;
  18 using blink::WebGamepads;
  19
  20 namespace content {
  21
  22 namespace {
  23
  24 void CopyNSStringAsUTF16LittleEndian(
  25     NSString* src, blink::WebUChar* dest, size_t dest_len) {
  26   NSData* as16 = [src dataUsingEncoding:NSUTF16LittleEndianStringEncoding];
  27   memset(dest, 0, dest_len);
  28   [as16 getBytes:dest length:dest_len - sizeof(blink::WebUChar)];
  29 }
  30
  31 NSDictionary* DeviceMatching(uint32_t usage_page, uint32_t usage) {
  32   return [NSDictionary dictionaryWithObjectsAndKeys:
  33       [NSNumber numberWithUnsignedInt:usage_page],
  34           base::mac::CFToNSCast(CFSTR(kIOHIDDeviceUsagePageKey)),
  35       [NSNumber numberWithUnsignedInt:usage],
  36           base::mac::CFToNSCast(CFSTR(kIOHIDDeviceUsageKey)),
  37       nil];
  38 }
  39
  40 float NormalizeAxis(CFIndex value, CFIndex min, CFIndex max) {
  41   return (2.f * (value - min) / static_cast<float>(max - min)) - 1.f;
  42 }
  43
  44 // http://www.usb.org/developers/hidpage
  45 const uint32_t kGenericDesktopUsagePage = 0x01;
  46 const uint32_t kGameControlsUsagePage = 0x05;
  47 const uint32_t kButtonUsagePage = 0x09;
  48 const uint32_t kJoystickUsageNumber = 0x04;
  49 const uint32_t kGameUsageNumber = 0x05;
  50 const uint32_t kMultiAxisUsageNumber = 0x08;
  51 const uint32_t kAxisMinimumUsageNumber = 0x30;
  52
  53 }  // namespace
  54
  55 GamepadPlatformDataFetcherMac::GamepadPlatformDataFetcherMac()
  56     : enabled_(true) {
  57   memset(associated_, 0, sizeof(associated_));
  58
  59   xbox_fetcher_.reset(new XboxDataFetcher(this));
  60   if (!xbox_fetcher_->RegisterForNotifications())
  61     xbox_fetcher_.reset();
  62
  63   hid_manager_ref_.reset(IOHIDManagerCreate(kCFAllocatorDefault,
  64                                             kIOHIDOptionsTypeNone));
  65   if (CFGetTypeID(hid_manager_ref_) != IOHIDManagerGetTypeID()) {
  66     enabled_ = false;
  67     return;
  68   }
  69
  70   base::scoped_nsobject<NSArray> criteria([[NSArray alloc] initWithObjects:
  71       DeviceMatching(kGenericDesktopUsagePage, kJoystickUsageNumber),
  72       DeviceMatching(kGenericDesktopUsagePage, kGameUsageNumber),
  73       DeviceMatching(kGenericDesktopUsagePage, kMultiAxisUsageNumber),
  74       nil]);
  75   IOHIDManagerSetDeviceMatchingMultiple(
  76       hid_manager_ref_,
  77       base::mac::NSToCFCast(criteria));
  78
  79   RegisterForNotifications();
  80 }
  81
  82 void GamepadPlatformDataFetcherMac::RegisterForNotifications() {
  83   // Register for plug/unplug notifications.
  84   IOHIDManagerRegisterDeviceMatchingCallback(
  85       hid_manager_ref_,
  86       &DeviceAddCallback,
  87       this);
  88   IOHIDManagerRegisterDeviceRemovalCallback(
  89       hid_manager_ref_,
  90       DeviceRemoveCallback,
  91       this);
  92
  93   // Register for value change notifications.
  94   IOHIDManagerRegisterInputValueCallback(
  95       hid_manager_ref_,
  96       ValueChangedCallback,
  97       this);
  98
  99   IOHIDManagerScheduleWithRunLoop(
 100       hid_manager_ref_,
 101       CFRunLoopGetMain(),
 102       kCFRunLoopDefaultMode);
 103
 104   enabled_ = IOHIDManagerOpen(hid_manager_ref_,
 105                               kIOHIDOptionsTypeNone) == kIOReturnSuccess;
 106
 107   if (xbox_fetcher_)
 108     xbox_fetcher_->RegisterForNotifications();
 109 }
 110
 111 void GamepadPlatformDataFetcherMac::UnregisterFromNotifications() {
 112   IOHIDManagerUnscheduleFromRunLoop(
 113       hid_manager_ref_,
 114       CFRunLoopGetCurrent(),
 115       kCFRunLoopDefaultMode);
 116   IOHIDManagerClose(hid_manager_ref_, kIOHIDOptionsTypeNone);
 117   if (xbox_fetcher_)
 118     xbox_fetcher_->UnregisterFromNotifications();
 119 }
 120
 121 void GamepadPlatformDataFetcherMac::PauseHint(bool pause) {
 122   if (pause)
 123     UnregisterFromNotifications();
 124   else
 125     RegisterForNotifications();
 126 }
 127
 128 GamepadPlatformDataFetcherMac::~GamepadPlatformDataFetcherMac() {
 129   UnregisterFromNotifications();
 130 }
 131
 132 GamepadPlatformDataFetcherMac*
 133 GamepadPlatformDataFetcherMac::InstanceFromContext(void* context) {
 134   return reinterpret_cast<GamepadPlatformDataFetcherMac*>(context);
 135 }
 136
 137 void GamepadPlatformDataFetcherMac::DeviceAddCallback(void* context,
 138                                                       IOReturn result,
 139                                                       void* sender,
 140                                                       IOHIDDeviceRef ref) {
 141   InstanceFromContext(context)->DeviceAdd(ref);
 142 }
 143
 144 void GamepadPlatformDataFetcherMac::DeviceRemoveCallback(void* context,
 145                                                          IOReturn result,
 146                                                          void* sender,
 147                                                          IOHIDDeviceRef ref) {
 148   InstanceFromContext(context)->DeviceRemove(ref);
 149 }
 150
 151 void GamepadPlatformDataFetcherMac::ValueChangedCallback(void* context,
 152                                                          IOReturn result,
 153                                                          void* sender,
 154                                                          IOHIDValueRef ref) {
 155   InstanceFromContext(context)->ValueChanged(ref);
 156 }
 157
 158 void GamepadPlatformDataFetcherMac::AddButtonsAndAxes(NSArray* elements,
 159                                                       size_t slot) {
 160   WebGamepad& pad = data_.items[slot];
 161   AssociatedData& associated = associated_[slot];
 162   CHECK(!associated.is_xbox);
 163
 164   pad.axesLength = 0;
 165   pad.buttonsLength = 0;
 166   pad.timestamp = 0;
 167   memset(pad.axes, 0, sizeof(pad.axes));
 168   memset(pad.buttons, 0, sizeof(pad.buttons));
 169
 170   bool mapped_all_axes = true;
 171
 172   for (id elem in elements) {
 173     IOHIDElementRef element = reinterpret_cast<IOHIDElementRef>(elem);
 174     uint32_t usage_page = IOHIDElementGetUsagePage(element);
 175     uint32_t usage = IOHIDElementGetUsage(element);
 176     if (IOHIDElementGetType(element) == kIOHIDElementTypeInput_Button &&
 177         usage_page == kButtonUsagePage) {
 178       uint32_t button_index = usage - 1;
 179       if (button_index < WebGamepad::buttonsLengthCap) {
 180         associated.hid.button_elements[button_index] = element;
 181         pad.buttonsLength = std::max(pad.buttonsLength, button_index + 1);
 182       }
 183     }
 184     else if (IOHIDElementGetType(element) == kIOHIDElementTypeInput_Misc) {
 185       uint32_t axis_index = usage - kAxisMinimumUsageNumber;
 186       if (axis_index < WebGamepad::axesLengthCap) {
 187         associated.hid.axis_minimums[axis_index] =
 188             IOHIDElementGetLogicalMin(element);
 189         associated.hid.axis_maximums[axis_index] =
 190             IOHIDElementGetLogicalMax(element);
 191         associated.hid.axis_elements[axis_index] = element;
 192         pad.axesLength = std::max(pad.axesLength, axis_index + 1);
 193       } else {
 194         mapped_all_axes = false;
 195       }
 196     }
 197   }
 198
 199   if (!mapped_all_axes) {
 200     // For axes who's usage puts them outside the standard axesLengthCap range.
 201     uint32_t next_index = 0;
 202     for (id elem in elements) {
 203       IOHIDElementRef element = reinterpret_cast<IOHIDElementRef>(elem);
 204       uint32_t usage_page = IOHIDElementGetUsagePage(element);
 205       uint32_t usage = IOHIDElementGetUsage(element);
 206       if (IOHIDElementGetType(element) == kIOHIDElementTypeInput_Misc &&
 207           usage - kAxisMinimumUsageNumber >= WebGamepad::axesLengthCap &&
 208           usage_page <= kGameControlsUsagePage) {
 209         for (; next_index < WebGamepad::axesLengthCap; ++next_index) {
 210           if (associated.hid.axis_elements[next_index] == NULL)
 211             break;
 212         }
 213         if (next_index < WebGamepad::axesLengthCap) {
 214           associated.hid.axis_minimums[next_index] =
 215               IOHIDElementGetLogicalMin(element);
 216           associated.hid.axis_maximums[next_index] =
 217               IOHIDElementGetLogicalMax(element);
 218           associated.hid.axis_elements[next_index] = element;
 219           pad.axesLength = std::max(pad.axesLength, next_index + 1);
 220         }
 221       }
 222
 223       if (next_index >= WebGamepad::axesLengthCap)
 224         break;
 225     }
 226   }
 227 }
 228
 229 size_t GamepadPlatformDataFetcherMac::GetEmptySlot() {
 230   // Find a free slot for this device.
 231   for (size_t slot = 0; slot < WebGamepads::itemsLengthCap; ++slot) {
 232     if (!data_.items[slot].connected)
 233       return slot;
 234   }
 235   return WebGamepads::itemsLengthCap;
 236 }
 237
 238 size_t GamepadPlatformDataFetcherMac::GetSlotForDevice(IOHIDDeviceRef device) {
 239   for (size_t slot = 0; slot < WebGamepads::itemsLengthCap; ++slot) {
 240     // If we already have this device, and it's already connected, don't do
 241     // anything now.
 242     if (data_.items[slot].connected &&
 243         !associated_[slot].is_xbox &&
 244         associated_[slot].hid.device_ref == device)
 245       return WebGamepads::itemsLengthCap;
 246   }
 247   return GetEmptySlot();
 248 }
 249
 250 size_t GamepadPlatformDataFetcherMac::GetSlotForXboxDevice(
 251     XboxController* device) {
 252   for (size_t slot = 0; slot < WebGamepads::itemsLengthCap; ++slot) {
 253     if (associated_[slot].is_xbox &&
 254         associated_[slot].xbox.location_id == device->location_id()) {
 255       if (data_.items[slot].connected) {
 256         // The device is already connected. No idea why we got a second "device
 257         // added" call, but let's not add it twice.
 258         DCHECK_EQ(associated_[slot].xbox.device, device);
 259         return WebGamepads::itemsLengthCap;
 260       } else {
 261         // A device with the same location ID was previously connected, so put
 262         // it in the same slot.
 263         return slot;
 264       }
 265     }
 266   }
 267   return GetEmptySlot();
 268 }
 269
 270 void GamepadPlatformDataFetcherMac::DeviceAdd(IOHIDDeviceRef device) {
 271   using base::mac::CFToNSCast;
 272   using base::mac::CFCastStrict;
 273
 274   if (!enabled_)
 275     return;
 276
 277   // Find an index for this device.
 278   size_t slot = GetSlotForDevice(device);
 279
 280   // We can't handle this many connected devices.
 281   if (slot == WebGamepads::itemsLengthCap)
 282     return;
 283
 284   NSNumber* vendor_id = CFToNSCast(CFCastStrict<CFNumberRef>(
 285       IOHIDDeviceGetProperty(device, CFSTR(kIOHIDVendorIDKey))));
 286   NSNumber* product_id = CFToNSCast(CFCastStrict<CFNumberRef>(
 287       IOHIDDeviceGetProperty(device, CFSTR(kIOHIDProductIDKey))));
 288   NSString* product = CFToNSCast(CFCastStrict<CFStringRef>(
 289       IOHIDDeviceGetProperty(device, CFSTR(kIOHIDProductKey))));
 290   int vendor_int = [vendor_id intValue];
 291   int product_int = [product_id intValue];
 292
 293   char vendor_as_str[5], product_as_str[5];
 294   snprintf(vendor_as_str, sizeof(vendor_as_str), "%04x", vendor_int);
 295   snprintf(product_as_str, sizeof(product_as_str), "%04x", product_int);
 296   associated_[slot].hid.mapper =
 297       GetGamepadStandardMappingFunction(vendor_as_str, product_as_str);
 298
 299   NSString* ident = [NSString stringWithFormat:
 300       @"%@ (%sVendor: %04x Product: %04x)",
 301       product,
 302       associated_[slot].hid.mapper ? "STANDARD GAMEPAD " : "",
 303       vendor_int,
 304       product_int];
 305   CopyNSStringAsUTF16LittleEndian(
 306       ident,
 307       data_.items[slot].id,
 308       sizeof(data_.items[slot].id));
 309
 310   if (associated_[slot].hid.mapper) {
 311     CopyNSStringAsUTF16LittleEndian(
 312       @"standard",
 313       data_.items[slot].mapping,
 314       sizeof(data_.items[slot].mapping));
 315   } else {
 316     data_.items[slot].mapping[0] = 0;
 317   }
 318
 319   base::ScopedCFTypeRef<CFArrayRef> elements(
 320       IOHIDDeviceCopyMatchingElements(device, NULL, kIOHIDOptionsTypeNone));
 321   AddButtonsAndAxes(CFToNSCast(elements), slot);
 322
 323   associated_[slot].hid.device_ref = device;
 324   data_.items[slot].connected = true;
 325   if (slot >= data_.length)
 326     data_.length = slot + 1;
 327 }
 328
 329 void GamepadPlatformDataFetcherMac::DeviceRemove(IOHIDDeviceRef device) {
 330   if (!enabled_)
 331     return;
 332
 333   // Find the index for this device.
 334   size_t slot;
 335   for (slot = 0; slot < WebGamepads::itemsLengthCap; ++slot) {
 336     if (data_.items[slot].connected &&
 337         !associated_[slot].is_xbox &&
 338         associated_[slot].hid.device_ref == device)
 339       break;
 340   }
 341   DCHECK(slot < WebGamepads::itemsLengthCap);
 342   // Leave associated device_ref so that it will be reconnected in the same
 343   // location. Simply mark it as disconnected.
 344   data_.items[slot].connected = false;
 345 }
 346
 347 void GamepadPlatformDataFetcherMac::ValueChanged(IOHIDValueRef value) {
 348   if (!enabled_)
 349     return;
 350
 351   IOHIDElementRef element = IOHIDValueGetElement(value);
 352   IOHIDDeviceRef device = IOHIDElementGetDevice(element);
 353
 354   // Find device slot.
 355   size_t slot;
 356   for (slot = 0; slot < data_.length; ++slot) {
 357     if (data_.items[slot].connected &&
 358         !associated_[slot].is_xbox &&
 359         associated_[slot].hid.device_ref == device)
 360       break;
 361   }
 362   if (slot == data_.length)
 363     return;
 364
 365   WebGamepad& pad = data_.items[slot];
 366   AssociatedData& associated = associated_[slot];
 367
 368   uint32_t value_length = IOHIDValueGetLength(value);
 369   if (value_length > 4) {
 370     // Workaround for bizarre issue with PS3 controllers that try to return
 371     // massive (30+ byte) values and crash IOHIDValueGetIntegerValue
 372     return;
 373   }
 374
 375   // Find and fill in the associated button event, if any.
 376   for (size_t i = 0; i < pad.buttonsLength; ++i) {
 377     if (associated.hid.button_elements[i] == element) {
 378       pad.buttons[i].pressed = IOHIDValueGetIntegerValue(value);
 379       pad.buttons[i].value = pad.buttons[i].pressed ? 1.f : 0.f;
 380       pad.timestamp = std::max(pad.timestamp, IOHIDValueGetTimeStamp(value));
 381       return;
 382     }
 383   }
 384
 385   // Find and fill in the associated axis event, if any.
 386   for (size_t i = 0; i < pad.axesLength; ++i) {
 387     if (associated.hid.axis_elements[i] == element) {
 388       pad.axes[i] = NormalizeAxis(IOHIDValueGetIntegerValue(value),
 389                                   associated.hid.axis_minimums[i],
 390                                   associated.hid.axis_maximums[i]);
 391       pad.timestamp = std::max(pad.timestamp, IOHIDValueGetTimeStamp(value));
 392       return;
 393     }
 394   }
 395 }
 396
 397 void GamepadPlatformDataFetcherMac::XboxDeviceAdd(XboxController* device) {
 398   if (!enabled_)
 399     return;
 400
 401   size_t slot = GetSlotForXboxDevice(device);
 402
 403   // We can't handle this many connected devices.
 404   if (slot == WebGamepads::itemsLengthCap)
 405     return;
 406
 407   device->SetLEDPattern(
 408       (XboxController::LEDPattern)(XboxController::LED_FLASH_TOP_LEFT + slot));
 409
 410   NSString* ident =
 411       [NSString stringWithFormat:
 412           @"%@ (STANDARD GAMEPAD Vendor: %04x Product: %04x)",
 413               device->GetControllerType() == XboxController::XBOX_360_CONTROLLER
 414                   ? @"Xbox 360 Controller"
 415                   : @"Xbox One Controller",
 416               device->GetProductId(), device->GetVendorId()];
 417   CopyNSStringAsUTF16LittleEndian(
 418       ident,
 419       data_.items[slot].id,
 420       sizeof(data_.items[slot].id));
 421
 422   CopyNSStringAsUTF16LittleEndian(
 423     @"standard",
 424     data_.items[slot].mapping,
 425     sizeof(data_.items[slot].mapping));
 426
 427   associated_[slot].is_xbox = true;
 428   associated_[slot].xbox.device = device;
 429   associated_[slot].xbox.location_id = device->location_id();
 430   data_.items[slot].connected = true;
 431   data_.items[slot].axesLength = 4;
 432   data_.items[slot].buttonsLength = 17;
 433   data_.items[slot].timestamp = 0;
 434   if (slot >= data_.length)
 435     data_.length = slot + 1;
 436 }
 437
 438 void GamepadPlatformDataFetcherMac::XboxDeviceRemove(XboxController* device) {
 439   if (!enabled_)
 440     return;
 441
 442   // Find the index for this device.
 443   size_t slot;
 444   for (slot = 0; slot < WebGamepads::itemsLengthCap; ++slot) {
 445     if (data_.items[slot].connected &&
 446         associated_[slot].is_xbox &&
 447         associated_[slot].xbox.device == device)
 448       break;
 449   }
 450   DCHECK(slot < WebGamepads::itemsLengthCap);
 451   // Leave associated location id so that the controller will be reconnected in
 452   // the same slot if it is plugged in again. Simply mark it as disconnected.
 453   data_.items[slot].connected = false;
 454 }
 455
 456 void GamepadPlatformDataFetcherMac::XboxValueChanged(
 457     XboxController* device, const XboxController::Data& data) {
 458   // Find device slot.
 459   size_t slot;
 460   for (slot = 0; slot < data_.length; ++slot) {
 461     if (data_.items[slot].connected &&
 462         associated_[slot].is_xbox &&
 463         associated_[slot].xbox.device == device)
 464       break;
 465   }
 466   if (slot == data_.length)
 467     return;
 468
 469   WebGamepad& pad = data_.items[slot];
 470
 471   for (size_t i = 0; i < 6; i++) {
 472     pad.buttons[i].pressed = data.buttons[i];
 473     pad.buttons[i].value = data.buttons[i] ? 1.0f : 0.0f;
 474   }
 475   pad.buttons[6].pressed = data.triggers[0] > kDefaultButtonPressedThreshold;
 476   pad.buttons[6].value = data.triggers[0];
 477   pad.buttons[7].pressed = data.triggers[1] > kDefaultButtonPressedThreshold;
 478   pad.buttons[7].value = data.triggers[1];
 479   for (size_t i = 8; i < 17; i++) {
 480     pad.buttons[i].pressed = data.buttons[i - 2];
 481     pad.buttons[i].value = data.buttons[i - 2] ? 1.0f : 0.0f;
 482   }
 483   for (size_t i = 0; i < arraysize(data.axes); i++) {
 484     pad.axes[i] = data.axes[i];
 485   }
 486
 487   pad.timestamp = base::TimeTicks::Now().ToInternalValue();
 488 }
 489
 490 void GamepadPlatformDataFetcherMac::GetGamepadData(WebGamepads* pads, bool) {
 491   if (!enabled_ && !xbox_fetcher_) {
 492     pads->length = 0;
 493     return;
 494   }
 495
 496   // Copy to the current state to the output buffer, using the mapping
 497   // function, if there is one available.
 498   pads->length = WebGamepads::itemsLengthCap;
 499   for (size_t i = 0; i < WebGamepads::itemsLengthCap; ++i) {
 500     if (!associated_[i].is_xbox && associated_[i].hid.mapper)
 501       associated_[i].hid.mapper(data_.items[i], &pads->items[i]);
 502     else
 503       pads->items[i] = data_.items[i];
 504   }
 505 }
 506
 507 }  // namespace content