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| 1 // Copyright (c) 2011 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/data_fetcher_mac.h" | |
| 6 | |
| 7 #include "base/mac/foundation_util.h" | |
| 8 #include "base/memory/scoped_nsobject.h" | |
| 9 #include "base/string16.h" | |
| 10 #include "base/string_util.h" | |
| 11 #include "base/utf_string_conversions.h" | |
| 12 | |
| 13 #include <IOKit/hid/IOHIDKeys.h> | |
| 14 #import <Foundation/Foundation.h> | |
| 15 | |
| 16 namespace content { | |
| 17 | |
| 18 namespace { | |
| 19 | |
| 20 NSDictionary* DeviceMatching(uint32_t usage_page, uint32_t usage) { | |
| 21 return [NSDictionary dictionaryWithObjectsAndKeys: | |
| 22 [NSNumber numberWithUnsignedInt:usage_page], | |
| 23 base::mac::CFToNSCast(CFSTR(kIOHIDDeviceUsagePageKey)), | |
| 24 [NSNumber numberWithUnsignedInt:usage], | |
| 25 base::mac::CFToNSCast(CFSTR(kIOHIDDeviceUsageKey)), | |
| 26 nil]; | |
| 27 } | |
| 28 | |
| 29 float NormalizeAxis(CFIndex value, CFIndex min, CFIndex max) { | |
| 30 return (2.f * (value - min) / static_cast<float>(max - min)) - 1.f; | |
| 31 } | |
| 32 | |
| 33 // http://www.usb.org/developers/hidpage | |
| 34 const uint32_t kGenericDesktopUsagePage = 0x01; | |
| 35 const uint32_t kButtonUsagePage = 0x09; | |
| 36 const uint32_t kJoystickUsageNumber = 0x04; | |
| 37 const uint32_t kGameUsageNumber = 0x05; | |
| 38 const uint32_t kMultiAxisUsageNumber = 0x08; | |
| 39 const uint32_t kAxisMinimumUsageNumber = 0x30; | |
| 40 const uint32_t kAxisMaximumUsageNumber = 0x35; | |
| 41 | |
| 42 } // namespace | |
| 43 | |
| 44 GamepadDataFetcherMac::GamepadDataFetcherMac() : enabled_(true) { | |
| 45 hid_manager_ref_.reset(IOHIDManagerCreate(kCFAllocatorDefault, | |
| 46 kIOHIDOptionsTypeNone)); | |
| 47 if (CFGetTypeID(hid_manager_ref_) != IOHIDManagerGetTypeID()) { | |
| 48 enabled_ = false; | |
| 49 return; | |
| 50 } | |
| 51 | |
| 52 scoped_nsobject<NSArray> criteria([[NSArray alloc] initWithObjects: | |
| 53 DeviceMatching(kGenericDesktopUsagePage, kJoystickUsageNumber), | |
| 54 DeviceMatching(kGenericDesktopUsagePage, kGameUsageNumber), | |
| 55 DeviceMatching(kGenericDesktopUsagePage, kMultiAxisUsageNumber), | |
| 56 nil]); | |
| 57 IOHIDManagerSetDeviceMatchingMultiple( | |
| 58 hid_manager_ref_, | |
| 59 base::mac::NSToCFCast(criteria)); | |
| 60 | |
| 61 RegisterForNotifications(); | |
| 62 } | |
| 63 | |
| 64 void GamepadDataFetcherMac::RegisterForNotifications() { | |
| 65 // Register for plug/unplug notifications. | |
| 66 IOHIDManagerRegisterDeviceMatchingCallback( | |
| 67 hid_manager_ref_, | |
| 68 &DeviceAddCallback, | |
| 69 this); | |
| 70 IOHIDManagerRegisterDeviceRemovalCallback( | |
| 71 hid_manager_ref_, | |
| 72 DeviceRemoveCallback, | |
| 73 this); | |
| 74 | |
| 75 // Register for value change notifications. | |
| 76 IOHIDManagerRegisterInputValueCallback( | |
| 77 hid_manager_ref_, | |
| 78 ValueChangedCallback, | |
| 79 this); | |
| 80 | |
| 81 IOHIDManagerScheduleWithRunLoop( | |
| 82 hid_manager_ref_, | |
| 83 CFRunLoopGetMain(), | |
| 84 kCFRunLoopDefaultMode); | |
| 85 | |
| 86 enabled_ = IOHIDManagerOpen(hid_manager_ref_, | |
| 87 kIOHIDOptionsTypeSeizeDevice) == kIOReturnSuccess; | |
| 88 } | |
| 89 | |
| 90 void GamepadDataFetcherMac::UnregisterFromNotifications() { | |
| 91 IOHIDManagerUnscheduleFromRunLoop( | |
| 92 hid_manager_ref_, | |
| 93 CFRunLoopGetCurrent(), | |
| 94 kCFRunLoopDefaultMode); | |
| 95 IOHIDManagerClose(hid_manager_ref_, kIOHIDOptionsTypeNone); | |
| 96 } | |
| 97 | |
| 98 void GamepadDataFetcherMac::PauseHint(bool pause) { | |
| 99 if (pause) | |
| 100 UnregisterFromNotifications(); | |
| 101 else | |
| 102 RegisterForNotifications(); | |
| 103 } | |
| 104 | |
| 105 GamepadDataFetcherMac::~GamepadDataFetcherMac() { | |
| 106 UnregisterFromNotifications(); | |
| 107 } | |
| 108 | |
| 109 GamepadDataFetcherMac* GamepadDataFetcherMac::InstanceFromContext( | |
| 110 void* context) { | |
| 111 return reinterpret_cast<GamepadDataFetcherMac*>(context); | |
| 112 } | |
| 113 | |
| 114 void GamepadDataFetcherMac::DeviceAddCallback(void* context, | |
| 115 IOReturn result, | |
| 116 void* sender, | |
| 117 IOHIDDeviceRef ref) { | |
| 118 InstanceFromContext(context)->DeviceAdd(ref); | |
| 119 } | |
| 120 | |
| 121 void GamepadDataFetcherMac::DeviceRemoveCallback(void* context, | |
| 122 IOReturn result, | |
| 123 void* sender, | |
| 124 IOHIDDeviceRef ref) { | |
| 125 InstanceFromContext(context)->DeviceRemove(ref); | |
| 126 } | |
| 127 | |
| 128 void GamepadDataFetcherMac::ValueChangedCallback(void* context, | |
| 129 IOReturn result, | |
| 130 void* sender, | |
| 131 IOHIDValueRef ref) { | |
| 132 InstanceFromContext(context)->ValueChanged(ref); | |
| 133 } | |
| 134 | |
| 135 void GamepadDataFetcherMac::AddButtonsAndAxes(NSArray* elements, | |
| 136 size_t slot) { | |
| 137 WebKit::WebGamepad& pad = data_.items[slot]; | |
| 138 AssociatedData& associated = associated_[slot]; | |
| 139 | |
| 140 pad.axesLength = 0; | |
| 141 pad.buttonsLength = 0; | |
| 142 memset(pad.axes, 0, sizeof(pad.axes)); | |
| 143 memset(pad.buttons, 0, sizeof(pad.buttons)); | |
| 144 | |
| 145 for (id elem in elements) { | |
| 146 IOHIDElementRef element = reinterpret_cast<IOHIDElementRef>(elem); | |
| 147 uint32_t usagePage = IOHIDElementGetUsagePage(element); | |
| 148 uint32_t usage = IOHIDElementGetUsage(element); | |
| 149 if (IOHIDElementGetType(element) == kIOHIDElementTypeInput_Button && | |
| 150 usagePage == kButtonUsagePage) { | |
| 151 uint32_t button_index = usage - 1; | |
| 152 if (button_index < WebKit::WebGamepad::buttonsLengthCap) { | |
| 153 associated.button_elements[button_index] = element; | |
| 154 pad.buttonsLength = std::max(pad.buttonsLength, button_index + 1); | |
| 155 } | |
| 156 } | |
| 157 else if (IOHIDElementGetType(element) == kIOHIDElementTypeInput_Misc) { | |
| 158 uint32_t axis_index = usage - kAxisMinimumUsageNumber; | |
| 159 if (axis_index < WebKit::WebGamepad::axesLengthCap) { | |
| 160 associated.axis_minimums[axis_index] = | |
| 161 IOHIDElementGetLogicalMin(element); | |
| 162 associated.axis_maximums[axis_index] = | |
| 163 IOHIDElementGetLogicalMax(element); | |
| 164 associated.axis_elements[axis_index] = element; | |
| 165 pad.axesLength = std::max(pad.axesLength, axis_index + 1); | |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 void GamepadDataFetcherMac::DeviceAdd(IOHIDDeviceRef device) { | |
| 172 using WebKit::WebGamepad; | |
| 173 using WebKit::WebGamepads; | |
| 174 using base::mac::CFToNSCast; | |
| 175 using base::mac::CFCastStrict; | |
| 176 size_t slot; | |
| 177 | |
| 178 if (!enabled_) | |
| 179 return; | |
| 180 | |
| 181 // Find an index for this device. | |
| 182 for (slot = 0; slot < WebGamepads::itemsLengthCap; ++slot) { | |
| 183 // If we already have this device, and it's already connected, don't do | |
| 184 // anything now. | |
| 185 if (associated_[slot].device_ref == device && data_.items[slot].connected) | |
| 186 return; | |
| 187 if (!data_.items[slot].connected) | |
| 188 break; | |
| 189 } | |
| 190 | |
| 191 // We can't handle this many connected devices. | |
| 192 if (slot == WebGamepads::itemsLengthCap) | |
| 193 return; | |
| 194 | |
| 195 NSNumber* vendor_id = CFToNSCast(CFCastStrict<CFNumberRef>( | |
| 196 IOHIDDeviceGetProperty(device, CFSTR(kIOHIDVendorIDKey)))); | |
| 197 NSNumber* product_id = CFToNSCast(CFCastStrict<CFNumberRef>( | |
| 198 IOHIDDeviceGetProperty(device, CFSTR(kIOHIDProductIDKey)))); | |
| 199 NSString* product = CFToNSCast(CFCastStrict<CFStringRef>( | |
| 200 IOHIDDeviceGetProperty(device, CFSTR(kIOHIDProductKey)))); | |
| 201 | |
| 202 NSString* ident([NSString stringWithFormat: | |
| 203 @"%@ (Vendor: %04x Product: %04x)", | |
| 204 product, | |
| 205 [vendor_id intValue], | |
| 206 [product_id intValue]]); | |
| 207 NSData* as16 = [ident dataUsingEncoding:NSUTF16StringEncoding]; | |
| 208 | |
| 209 const size_t kOutputLengthBytes = sizeof(data_.items[slot].id); | |
| 210 memset(&data_.items[slot].id, 0, kOutputLengthBytes); | |
| 211 [as16 getBytes:data_.items[slot].id | |
| 212 length:kOutputLengthBytes - sizeof(WebKit::WebUChar)]; | |
| 213 | |
| 214 base::mac::ScopedCFTypeRef<CFArrayRef> elements( | |
| 215 IOHIDDeviceCopyMatchingElements(device, NULL, kIOHIDOptionsTypeNone)); | |
| 216 AddButtonsAndAxes(CFToNSCast(elements), slot); | |
| 217 | |
| 218 associated_[slot].device_ref = device; | |
| 219 data_.items[slot].connected = true; | |
| 220 if (slot >= data_.length) | |
| 221 data_.length = slot + 1; | |
| 222 } | |
| 223 | |
| 224 void GamepadDataFetcherMac::DeviceRemove(IOHIDDeviceRef device) { | |
| 225 using WebKit::WebGamepads; | |
| 226 size_t slot; | |
| 227 if (!enabled_) | |
| 228 return; | |
| 229 | |
| 230 // Find the index for this device. | |
| 231 for (slot = 0; slot < WebGamepads::itemsLengthCap; ++slot) { | |
| 232 if (associated_[slot].device_ref == device && data_.items[slot].connected) | |
| 233 break; | |
| 234 } | |
| 235 DCHECK(slot < WebGamepads::itemsLengthCap); | |
| 236 // Leave associated device_ref so that it will be reconnected in the same | |
| 237 // location. Simply mark it as disconnected. | |
| 238 data_.items[slot].connected = false; | |
| 239 } | |
| 240 | |
| 241 void GamepadDataFetcherMac::ValueChanged(IOHIDValueRef value) { | |
| 242 if (!enabled_) | |
| 243 return; | |
| 244 | |
| 245 IOHIDElementRef element = IOHIDValueGetElement(value); | |
| 246 IOHIDDeviceRef device = IOHIDElementGetDevice(element); | |
| 247 | |
| 248 // Find device slot. | |
| 249 size_t slot; | |
| 250 for (slot = 0; slot < data_.length; ++slot) { | |
| 251 if (data_.items[slot].connected && associated_[slot].device_ref == device) | |
| 252 break; | |
| 253 } | |
| 254 if (slot == data_.length) | |
| 255 return; | |
| 256 | |
| 257 WebKit::WebGamepad& pad = data_.items[slot]; | |
| 258 AssociatedData& associated = associated_[slot]; | |
| 259 | |
| 260 // Find and fill in the associated button event, if any. | |
| 261 for (size_t i = 0; i < pad.buttonsLength; ++i) { | |
| 262 if (associated.button_elements[i] == element) { | |
| 263 pad.buttons[i] = IOHIDValueGetIntegerValue(value) ? 1.f : 0.f; | |
| 264 return; | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 // Find and fill in the associated axis event, if any. | |
| 269 for (size_t i = 0; i < pad.axesLength; ++i) { | |
| 270 if (associated.axis_elements[i] == element) { | |
| 271 pad.axes[i] = NormalizeAxis(IOHIDValueGetIntegerValue(value), | |
| 272 associated.axis_minimums[i], | |
| 273 associated.axis_maximums[i]); | |
| 274 return; | |
| 275 } | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 void GamepadDataFetcherMac::GetGamepadData(WebKit::WebGamepads* pads, bool) { | |
| 280 if (!enabled_) { | |
| 281 pads->length = 0; | |
| 282 return; | |
| 283 } | |
| 284 memcpy(pads, &data_, sizeof(WebKit::WebGamepads)); | |
| 285 } | |
| 286 | |
| 287 } // namespace content | |
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Chromium Code Reviews
Issue 8899017:
Add gamepad data fetcher for Linux (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src