InputReader.h revision 86ea1f5f521981d075aef56f11693e4f3bc32fdb
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef _UI_INPUT_READER_H 18#define _UI_INPUT_READER_H 19 20#include "EventHub.h" 21#include "InputDispatcher.h" 22#include "PointerController.h" 23 24#include <ui/Input.h> 25#include <ui/DisplayInfo.h> 26#include <utils/KeyedVector.h> 27#include <utils/threads.h> 28#include <utils/Timers.h> 29#include <utils/RefBase.h> 30#include <utils/String8.h> 31#include <utils/BitSet.h> 32 33#include <stddef.h> 34#include <unistd.h> 35 36namespace android { 37 38class InputDevice; 39class InputMapper; 40 41 42/* 43 * Input reader policy interface. 44 * 45 * The input reader policy is used by the input reader to interact with the Window Manager 46 * and other system components. 47 * 48 * The actual implementation is partially supported by callbacks into the DVM 49 * via JNI. This interface is also mocked in the unit tests. 50 */ 51class InputReaderPolicyInterface : public virtual RefBase { 52protected: 53 InputReaderPolicyInterface() { } 54 virtual ~InputReaderPolicyInterface() { } 55 56public: 57 /* Display orientations. */ 58 enum { 59 ROTATION_0 = 0, 60 ROTATION_90 = 1, 61 ROTATION_180 = 2, 62 ROTATION_270 = 3 63 }; 64 65 /* Gets information about the display with the specified id. 66 * Returns true if the display info is available, false otherwise. 67 */ 68 virtual bool getDisplayInfo(int32_t displayId, 69 int32_t* width, int32_t* height, int32_t* orientation) = 0; 70 71 /* Determines whether to turn on some hacks we have to improve the touch interaction with a 72 * certain device whose screen currently is not all that good. 73 */ 74 virtual bool filterTouchEvents() = 0; 75 76 /* Determines whether to turn on some hacks to improve touch interaction with another device 77 * where touch coordinate data can get corrupted. 78 */ 79 virtual bool filterJumpyTouchEvents() = 0; 80 81 /* Gets the amount of time to disable virtual keys after the screen is touched 82 * in order to filter out accidental virtual key presses due to swiping gestures 83 * or taps near the edge of the display. May be 0 to disable the feature. 84 */ 85 virtual nsecs_t getVirtualKeyQuietTime() = 0; 86 87 /* Gets the excluded device names for the platform. */ 88 virtual void getExcludedDeviceNames(Vector<String8>& outExcludedDeviceNames) = 0; 89 90 /* Gets a pointer controller associated with the specified cursor device (ie. a mouse). */ 91 virtual sp<PointerControllerInterface> obtainPointerController(int32_t deviceId) = 0; 92}; 93 94 95/* Processes raw input events and sends cooked event data to an input dispatcher. */ 96class InputReaderInterface : public virtual RefBase { 97protected: 98 InputReaderInterface() { } 99 virtual ~InputReaderInterface() { } 100 101public: 102 /* Dumps the state of the input reader. 103 * 104 * This method may be called on any thread (usually by the input manager). */ 105 virtual void dump(String8& dump) = 0; 106 107 /* Runs a single iteration of the processing loop. 108 * Nominally reads and processes one incoming message from the EventHub. 109 * 110 * This method should be called on the input reader thread. 111 */ 112 virtual void loopOnce() = 0; 113 114 /* Gets the current input device configuration. 115 * 116 * This method may be called on any thread (usually by the input manager). 117 */ 118 virtual void getInputConfiguration(InputConfiguration* outConfiguration) = 0; 119 120 /* Gets information about the specified input device. 121 * Returns OK if the device information was obtained or NAME_NOT_FOUND if there 122 * was no such device. 123 * 124 * This method may be called on any thread (usually by the input manager). 125 */ 126 virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo) = 0; 127 128 /* Gets the list of all registered device ids. */ 129 virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds) = 0; 130 131 /* Query current input state. */ 132 virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask, 133 int32_t scanCode) = 0; 134 virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, 135 int32_t keyCode) = 0; 136 virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, 137 int32_t sw) = 0; 138 139 /* Determine whether physical keys exist for the given framework-domain key codes. */ 140 virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask, 141 size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) = 0; 142}; 143 144 145/* Internal interface used by individual input devices to access global input device state 146 * and parameters maintained by the input reader. 147 */ 148class InputReaderContext { 149public: 150 InputReaderContext() { } 151 virtual ~InputReaderContext() { } 152 153 virtual void updateGlobalMetaState() = 0; 154 virtual int32_t getGlobalMetaState() = 0; 155 156 virtual void disableVirtualKeysUntil(nsecs_t time) = 0; 157 virtual bool shouldDropVirtualKey(nsecs_t now, 158 InputDevice* device, int32_t keyCode, int32_t scanCode) = 0; 159 160 virtual void fadePointer() = 0; 161 162 virtual void requestTimeoutAtTime(nsecs_t when) = 0; 163 164 virtual InputReaderPolicyInterface* getPolicy() = 0; 165 virtual InputDispatcherInterface* getDispatcher() = 0; 166 virtual EventHubInterface* getEventHub() = 0; 167}; 168 169 170/* The input reader reads raw event data from the event hub and processes it into input events 171 * that it sends to the input dispatcher. Some functions of the input reader, such as early 172 * event filtering in low power states, are controlled by a separate policy object. 173 * 174 * IMPORTANT INVARIANT: 175 * Because the policy and dispatcher can potentially block or cause re-entrance into 176 * the input reader, the input reader never calls into other components while holding 177 * an exclusive internal lock whenever re-entrance can happen. 178 */ 179class InputReader : public InputReaderInterface, protected InputReaderContext { 180public: 181 InputReader(const sp<EventHubInterface>& eventHub, 182 const sp<InputReaderPolicyInterface>& policy, 183 const sp<InputDispatcherInterface>& dispatcher); 184 virtual ~InputReader(); 185 186 virtual void dump(String8& dump); 187 188 virtual void loopOnce(); 189 190 virtual void getInputConfiguration(InputConfiguration* outConfiguration); 191 192 virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo); 193 virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds); 194 195 virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask, 196 int32_t scanCode); 197 virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, 198 int32_t keyCode); 199 virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, 200 int32_t sw); 201 202 virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask, 203 size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags); 204 205protected: 206 // These methods are protected virtual so they can be overridden and instrumented 207 // by test cases. 208 virtual InputDevice* createDevice(int32_t deviceId, const String8& name, uint32_t classes); 209 210private: 211 sp<EventHubInterface> mEventHub; 212 sp<InputReaderPolicyInterface> mPolicy; 213 sp<InputDispatcherInterface> mDispatcher; 214 215 virtual InputReaderPolicyInterface* getPolicy() { return mPolicy.get(); } 216 virtual InputDispatcherInterface* getDispatcher() { return mDispatcher.get(); } 217 virtual EventHubInterface* getEventHub() { return mEventHub.get(); } 218 219 // The event queue. 220 static const int EVENT_BUFFER_SIZE = 256; 221 RawEvent mEventBuffer[EVENT_BUFFER_SIZE]; 222 223 // This reader/writer lock guards the list of input devices. 224 // The writer lock must be held whenever the list of input devices is modified 225 // and then promptly released. 226 // The reader lock must be held whenever the list of input devices is traversed or an 227 // input device in the list is accessed. 228 // This lock only protects the registry and prevents inadvertent deletion of device objects 229 // that are in use. Individual devices are responsible for guarding their own internal state 230 // as needed for concurrent operation. 231 RWLock mDeviceRegistryLock; 232 KeyedVector<int32_t, InputDevice*> mDevices; 233 234 // low-level input event decoding and device management 235 void processEvents(const RawEvent* rawEvents, size_t count); 236 237 void addDevice(int32_t deviceId); 238 void removeDevice(int32_t deviceId); 239 void processEventsForDevice(int32_t deviceId, const RawEvent* rawEvents, size_t count); 240 void timeoutExpired(nsecs_t when); 241 242 void handleConfigurationChanged(nsecs_t when); 243 void configureExcludedDevices(); 244 245 // state management for all devices 246 Mutex mStateLock; 247 248 int32_t mGlobalMetaState; 249 virtual void updateGlobalMetaState(); 250 virtual int32_t getGlobalMetaState(); 251 252 virtual void fadePointer(); 253 254 InputConfiguration mInputConfiguration; 255 void updateInputConfiguration(); 256 257 nsecs_t mDisableVirtualKeysTimeout; // only accessed by reader thread 258 virtual void disableVirtualKeysUntil(nsecs_t time); 259 virtual bool shouldDropVirtualKey(nsecs_t now, 260 InputDevice* device, int32_t keyCode, int32_t scanCode); 261 262 nsecs_t mNextTimeout; // only accessed by reader thread 263 virtual void requestTimeoutAtTime(nsecs_t when); 264 265 // state queries 266 typedef int32_t (InputDevice::*GetStateFunc)(uint32_t sourceMask, int32_t code); 267 int32_t getState(int32_t deviceId, uint32_t sourceMask, int32_t code, 268 GetStateFunc getStateFunc); 269 bool markSupportedKeyCodes(int32_t deviceId, uint32_t sourceMask, size_t numCodes, 270 const int32_t* keyCodes, uint8_t* outFlags); 271}; 272 273 274/* Reads raw events from the event hub and processes them, endlessly. */ 275class InputReaderThread : public Thread { 276public: 277 InputReaderThread(const sp<InputReaderInterface>& reader); 278 virtual ~InputReaderThread(); 279 280private: 281 sp<InputReaderInterface> mReader; 282 283 virtual bool threadLoop(); 284}; 285 286 287/* Represents the state of a single input device. */ 288class InputDevice { 289public: 290 InputDevice(InputReaderContext* context, int32_t id, const String8& name); 291 ~InputDevice(); 292 293 inline InputReaderContext* getContext() { return mContext; } 294 inline int32_t getId() { return mId; } 295 inline const String8& getName() { return mName; } 296 inline uint32_t getSources() { return mSources; } 297 298 inline bool isExternal() { return mIsExternal; } 299 inline void setExternal(bool external) { mIsExternal = external; } 300 301 inline bool isIgnored() { return mMappers.isEmpty(); } 302 303 void dump(String8& dump); 304 void addMapper(InputMapper* mapper); 305 void configure(); 306 void reset(); 307 void process(const RawEvent* rawEvents, size_t count); 308 void timeoutExpired(nsecs_t when); 309 310 void getDeviceInfo(InputDeviceInfo* outDeviceInfo); 311 int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); 312 int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); 313 int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode); 314 bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, 315 const int32_t* keyCodes, uint8_t* outFlags); 316 317 int32_t getMetaState(); 318 319 void fadePointer(); 320 321 inline const PropertyMap& getConfiguration() { 322 return mConfiguration; 323 } 324 325private: 326 InputReaderContext* mContext; 327 int32_t mId; 328 329 Vector<InputMapper*> mMappers; 330 331 String8 mName; 332 uint32_t mSources; 333 bool mIsExternal; 334 335 typedef int32_t (InputMapper::*GetStateFunc)(uint32_t sourceMask, int32_t code); 336 int32_t getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc); 337 338 PropertyMap mConfiguration; 339}; 340 341 342/* An input mapper transforms raw input events into cooked event data. 343 * A single input device can have multiple associated input mappers in order to interpret 344 * different classes of events. 345 */ 346class InputMapper { 347public: 348 InputMapper(InputDevice* device); 349 virtual ~InputMapper(); 350 351 inline InputDevice* getDevice() { return mDevice; } 352 inline int32_t getDeviceId() { return mDevice->getId(); } 353 inline const String8 getDeviceName() { return mDevice->getName(); } 354 inline InputReaderContext* getContext() { return mContext; } 355 inline InputReaderPolicyInterface* getPolicy() { return mContext->getPolicy(); } 356 inline InputDispatcherInterface* getDispatcher() { return mContext->getDispatcher(); } 357 inline EventHubInterface* getEventHub() { return mContext->getEventHub(); } 358 359 virtual uint32_t getSources() = 0; 360 virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); 361 virtual void dump(String8& dump); 362 virtual void configure(); 363 virtual void reset(); 364 virtual void process(const RawEvent* rawEvent) = 0; 365 virtual void timeoutExpired(nsecs_t when); 366 367 virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); 368 virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); 369 virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode); 370 virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, 371 const int32_t* keyCodes, uint8_t* outFlags); 372 373 virtual int32_t getMetaState(); 374 375 virtual void fadePointer(); 376 377protected: 378 InputDevice* mDevice; 379 InputReaderContext* mContext; 380 381 static void dumpRawAbsoluteAxisInfo(String8& dump, 382 const RawAbsoluteAxisInfo& axis, const char* name); 383}; 384 385 386class SwitchInputMapper : public InputMapper { 387public: 388 SwitchInputMapper(InputDevice* device); 389 virtual ~SwitchInputMapper(); 390 391 virtual uint32_t getSources(); 392 virtual void process(const RawEvent* rawEvent); 393 394 virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode); 395 396private: 397 void processSwitch(nsecs_t when, int32_t switchCode, int32_t switchValue); 398}; 399 400 401class KeyboardInputMapper : public InputMapper { 402public: 403 KeyboardInputMapper(InputDevice* device, uint32_t source, int32_t keyboardType); 404 virtual ~KeyboardInputMapper(); 405 406 virtual uint32_t getSources(); 407 virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); 408 virtual void dump(String8& dump); 409 virtual void configure(); 410 virtual void reset(); 411 virtual void process(const RawEvent* rawEvent); 412 413 virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); 414 virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); 415 virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, 416 const int32_t* keyCodes, uint8_t* outFlags); 417 418 virtual int32_t getMetaState(); 419 420private: 421 Mutex mLock; 422 423 struct KeyDown { 424 int32_t keyCode; 425 int32_t scanCode; 426 }; 427 428 uint32_t mSource; 429 int32_t mKeyboardType; 430 431 // Immutable configuration parameters. 432 struct Parameters { 433 int32_t associatedDisplayId; 434 bool orientationAware; 435 } mParameters; 436 437 struct LockedState { 438 Vector<KeyDown> keyDowns; // keys that are down 439 int32_t metaState; 440 nsecs_t downTime; // time of most recent key down 441 442 struct LedState { 443 bool avail; // led is available 444 bool on; // we think the led is currently on 445 }; 446 LedState capsLockLedState; 447 LedState numLockLedState; 448 LedState scrollLockLedState; 449 } mLocked; 450 451 void initializeLocked(); 452 453 void configureParameters(); 454 void dumpParameters(String8& dump); 455 456 bool isKeyboardOrGamepadKey(int32_t scanCode); 457 458 void processKey(nsecs_t when, bool down, int32_t keyCode, int32_t scanCode, 459 uint32_t policyFlags); 460 461 ssize_t findKeyDownLocked(int32_t scanCode); 462 463 void resetLedStateLocked(); 464 void initializeLedStateLocked(LockedState::LedState& ledState, int32_t led); 465 void updateLedStateLocked(bool reset); 466 void updateLedStateForModifierLocked(LockedState::LedState& ledState, int32_t led, 467 int32_t modifier, bool reset); 468}; 469 470 471class CursorInputMapper : public InputMapper { 472public: 473 CursorInputMapper(InputDevice* device); 474 virtual ~CursorInputMapper(); 475 476 virtual uint32_t getSources(); 477 virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); 478 virtual void dump(String8& dump); 479 virtual void configure(); 480 virtual void reset(); 481 virtual void process(const RawEvent* rawEvent); 482 483 virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); 484 485 virtual void fadePointer(); 486 487private: 488 // Amount that trackball needs to move in order to generate a key event. 489 static const int32_t TRACKBALL_MOVEMENT_THRESHOLD = 6; 490 491 Mutex mLock; 492 493 // Immutable configuration parameters. 494 struct Parameters { 495 enum Mode { 496 MODE_POINTER, 497 MODE_NAVIGATION, 498 }; 499 500 Mode mode; 501 int32_t associatedDisplayId; 502 bool orientationAware; 503 } mParameters; 504 505 struct Accumulator { 506 enum { 507 FIELD_BUTTONS = 1, 508 FIELD_REL_X = 2, 509 FIELD_REL_Y = 4, 510 FIELD_REL_WHEEL = 8, 511 FIELD_REL_HWHEEL = 16, 512 }; 513 514 uint32_t fields; 515 516 uint32_t buttonDown; 517 uint32_t buttonUp; 518 519 int32_t relX; 520 int32_t relY; 521 int32_t relWheel; 522 int32_t relHWheel; 523 524 inline void clear() { 525 fields = 0; 526 } 527 } mAccumulator; 528 529 int32_t mSource; 530 float mXScale; 531 float mYScale; 532 float mXPrecision; 533 float mYPrecision; 534 535 bool mHaveVWheel; 536 bool mHaveHWheel; 537 float mVWheelScale; 538 float mHWheelScale; 539 540 sp<PointerControllerInterface> mPointerController; 541 542 struct LockedState { 543 uint32_t buttonState; 544 nsecs_t downTime; 545 } mLocked; 546 547 void initializeLocked(); 548 549 void configureParameters(); 550 void dumpParameters(String8& dump); 551 552 void sync(nsecs_t when); 553}; 554 555 556class TouchInputMapper : public InputMapper { 557public: 558 TouchInputMapper(InputDevice* device); 559 virtual ~TouchInputMapper(); 560 561 virtual uint32_t getSources(); 562 virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); 563 virtual void dump(String8& dump); 564 virtual void configure(); 565 virtual void reset(); 566 567 virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); 568 virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); 569 virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, 570 const int32_t* keyCodes, uint8_t* outFlags); 571 572 virtual void fadePointer(); 573 574protected: 575 Mutex mLock; 576 577 struct VirtualKey { 578 int32_t keyCode; 579 int32_t scanCode; 580 uint32_t flags; 581 582 // computed hit box, specified in touch screen coords based on known display size 583 int32_t hitLeft; 584 int32_t hitTop; 585 int32_t hitRight; 586 int32_t hitBottom; 587 588 inline bool isHit(int32_t x, int32_t y) const { 589 return x >= hitLeft && x <= hitRight && y >= hitTop && y <= hitBottom; 590 } 591 }; 592 593 // Raw data for a single pointer. 594 struct PointerData { 595 uint32_t id; 596 int32_t x; 597 int32_t y; 598 int32_t pressure; 599 int32_t touchMajor; 600 int32_t touchMinor; 601 int32_t toolMajor; 602 int32_t toolMinor; 603 int32_t orientation; 604 605 inline bool operator== (const PointerData& other) const { 606 return id == other.id 607 && x == other.x 608 && y == other.y 609 && pressure == other.pressure 610 && touchMajor == other.touchMajor 611 && touchMinor == other.touchMinor 612 && toolMajor == other.toolMajor 613 && toolMinor == other.toolMinor 614 && orientation == other.orientation; 615 } 616 inline bool operator!= (const PointerData& other) const { 617 return !(*this == other); 618 } 619 }; 620 621 // Raw data for a collection of pointers including a pointer id mapping table. 622 struct TouchData { 623 uint32_t pointerCount; 624 PointerData pointers[MAX_POINTERS]; 625 BitSet32 idBits; 626 uint32_t idToIndex[MAX_POINTER_ID + 1]; 627 uint32_t buttonState; 628 629 void copyFrom(const TouchData& other) { 630 pointerCount = other.pointerCount; 631 idBits = other.idBits; 632 buttonState = other.buttonState; 633 634 for (uint32_t i = 0; i < pointerCount; i++) { 635 pointers[i] = other.pointers[i]; 636 637 int id = pointers[i].id; 638 idToIndex[id] = other.idToIndex[id]; 639 } 640 } 641 642 inline void clear() { 643 pointerCount = 0; 644 idBits.clear(); 645 buttonState = 0; 646 } 647 648 void getCentroid(float* outX, float* outY) { 649 float x = 0, y = 0; 650 if (pointerCount != 0) { 651 for (uint32_t i = 0; i < pointerCount; i++) { 652 x += pointers[i].x; 653 y += pointers[i].y; 654 } 655 x /= pointerCount; 656 y /= pointerCount; 657 } 658 *outX = x; 659 *outY = y; 660 } 661 }; 662 663 // Input sources supported by the device. 664 uint32_t mTouchSource; // sources when reporting touch data 665 uint32_t mPointerSource; // sources when reporting pointer gestures 666 667 // Immutable configuration parameters. 668 struct Parameters { 669 enum DeviceType { 670 DEVICE_TYPE_TOUCH_SCREEN, 671 DEVICE_TYPE_TOUCH_PAD, 672 DEVICE_TYPE_POINTER, 673 }; 674 675 DeviceType deviceType; 676 int32_t associatedDisplayId; 677 bool orientationAware; 678 679 bool useBadTouchFilter; 680 bool useJumpyTouchFilter; 681 bool useAveragingTouchFilter; 682 nsecs_t virtualKeyQuietTime; 683 684 enum GestureMode { 685 GESTURE_MODE_POINTER, 686 GESTURE_MODE_SPOTS, 687 }; 688 GestureMode gestureMode; 689 } mParameters; 690 691 // Immutable calibration parameters in parsed form. 692 struct Calibration { 693 // Touch Size 694 enum TouchSizeCalibration { 695 TOUCH_SIZE_CALIBRATION_DEFAULT, 696 TOUCH_SIZE_CALIBRATION_NONE, 697 TOUCH_SIZE_CALIBRATION_GEOMETRIC, 698 TOUCH_SIZE_CALIBRATION_PRESSURE, 699 }; 700 701 TouchSizeCalibration touchSizeCalibration; 702 703 // Tool Size 704 enum ToolSizeCalibration { 705 TOOL_SIZE_CALIBRATION_DEFAULT, 706 TOOL_SIZE_CALIBRATION_NONE, 707 TOOL_SIZE_CALIBRATION_GEOMETRIC, 708 TOOL_SIZE_CALIBRATION_LINEAR, 709 TOOL_SIZE_CALIBRATION_AREA, 710 }; 711 712 ToolSizeCalibration toolSizeCalibration; 713 bool haveToolSizeLinearScale; 714 float toolSizeLinearScale; 715 bool haveToolSizeLinearBias; 716 float toolSizeLinearBias; 717 bool haveToolSizeAreaScale; 718 float toolSizeAreaScale; 719 bool haveToolSizeAreaBias; 720 float toolSizeAreaBias; 721 bool haveToolSizeIsSummed; 722 bool toolSizeIsSummed; 723 724 // Pressure 725 enum PressureCalibration { 726 PRESSURE_CALIBRATION_DEFAULT, 727 PRESSURE_CALIBRATION_NONE, 728 PRESSURE_CALIBRATION_PHYSICAL, 729 PRESSURE_CALIBRATION_AMPLITUDE, 730 }; 731 enum PressureSource { 732 PRESSURE_SOURCE_DEFAULT, 733 PRESSURE_SOURCE_PRESSURE, 734 PRESSURE_SOURCE_TOUCH, 735 }; 736 737 PressureCalibration pressureCalibration; 738 PressureSource pressureSource; 739 bool havePressureScale; 740 float pressureScale; 741 742 // Size 743 enum SizeCalibration { 744 SIZE_CALIBRATION_DEFAULT, 745 SIZE_CALIBRATION_NONE, 746 SIZE_CALIBRATION_NORMALIZED, 747 }; 748 749 SizeCalibration sizeCalibration; 750 751 // Orientation 752 enum OrientationCalibration { 753 ORIENTATION_CALIBRATION_DEFAULT, 754 ORIENTATION_CALIBRATION_NONE, 755 ORIENTATION_CALIBRATION_INTERPOLATED, 756 ORIENTATION_CALIBRATION_VECTOR, 757 }; 758 759 OrientationCalibration orientationCalibration; 760 } mCalibration; 761 762 // Raw axis information from the driver. 763 struct RawAxes { 764 RawAbsoluteAxisInfo x; 765 RawAbsoluteAxisInfo y; 766 RawAbsoluteAxisInfo pressure; 767 RawAbsoluteAxisInfo touchMajor; 768 RawAbsoluteAxisInfo touchMinor; 769 RawAbsoluteAxisInfo toolMajor; 770 RawAbsoluteAxisInfo toolMinor; 771 RawAbsoluteAxisInfo orientation; 772 } mRawAxes; 773 774 // Current and previous touch sample data. 775 TouchData mCurrentTouch; 776 PointerCoords mCurrentTouchCoords[MAX_POINTERS]; 777 778 TouchData mLastTouch; 779 PointerCoords mLastTouchCoords[MAX_POINTERS]; 780 781 // The time the primary pointer last went down. 782 nsecs_t mDownTime; 783 784 // The pointer controller, or null if the device is not a pointer. 785 sp<PointerControllerInterface> mPointerController; 786 787 struct LockedState { 788 Vector<VirtualKey> virtualKeys; 789 790 // The surface orientation and width and height set by configureSurfaceLocked(). 791 int32_t surfaceOrientation; 792 int32_t surfaceWidth, surfaceHeight; 793 794 // The associated display orientation and width and height set by configureSurfaceLocked(). 795 int32_t associatedDisplayOrientation; 796 int32_t associatedDisplayWidth, associatedDisplayHeight; 797 798 // Translation and scaling factors, orientation-independent. 799 float xScale; 800 float xPrecision; 801 802 float yScale; 803 float yPrecision; 804 805 float geometricScale; 806 807 float toolSizeLinearScale; 808 float toolSizeLinearBias; 809 float toolSizeAreaScale; 810 float toolSizeAreaBias; 811 812 float pressureScale; 813 814 float sizeScale; 815 816 float orientationScale; 817 818 // Oriented motion ranges for input device info. 819 struct OrientedRanges { 820 InputDeviceInfo::MotionRange x; 821 InputDeviceInfo::MotionRange y; 822 823 bool havePressure; 824 InputDeviceInfo::MotionRange pressure; 825 826 bool haveSize; 827 InputDeviceInfo::MotionRange size; 828 829 bool haveTouchSize; 830 InputDeviceInfo::MotionRange touchMajor; 831 InputDeviceInfo::MotionRange touchMinor; 832 833 bool haveToolSize; 834 InputDeviceInfo::MotionRange toolMajor; 835 InputDeviceInfo::MotionRange toolMinor; 836 837 bool haveOrientation; 838 InputDeviceInfo::MotionRange orientation; 839 } orientedRanges; 840 841 // Oriented dimensions and precision. 842 float orientedSurfaceWidth, orientedSurfaceHeight; 843 float orientedXPrecision, orientedYPrecision; 844 845 struct CurrentVirtualKeyState { 846 bool down; 847 nsecs_t downTime; 848 int32_t keyCode; 849 int32_t scanCode; 850 } currentVirtualKey; 851 852 // Scale factor for gesture based pointer movements. 853 float pointerGestureXMovementScale; 854 float pointerGestureYMovementScale; 855 856 // Scale factor for gesture based zooming and other freeform motions. 857 float pointerGestureXZoomScale; 858 float pointerGestureYZoomScale; 859 860 // The maximum swipe width. 861 float pointerGestureMaxSwipeWidth; 862 } mLocked; 863 864 virtual void configureParameters(); 865 virtual void dumpParameters(String8& dump); 866 virtual void configureRawAxes(); 867 virtual void dumpRawAxes(String8& dump); 868 virtual bool configureSurfaceLocked(); 869 virtual void dumpSurfaceLocked(String8& dump); 870 virtual void configureVirtualKeysLocked(); 871 virtual void dumpVirtualKeysLocked(String8& dump); 872 virtual void parseCalibration(); 873 virtual void resolveCalibration(); 874 virtual void dumpCalibration(String8& dump); 875 876 enum TouchResult { 877 // Dispatch the touch normally. 878 DISPATCH_TOUCH, 879 // Do not dispatch the touch, but keep tracking the current stroke. 880 SKIP_TOUCH, 881 // Do not dispatch the touch, and drop all information associated with the current stoke 882 // so the next movement will appear as a new down. 883 DROP_STROKE 884 }; 885 886 void syncTouch(nsecs_t when, bool havePointerIds); 887 888private: 889 /* Maximum number of historical samples to average. */ 890 static const uint32_t AVERAGING_HISTORY_SIZE = 5; 891 892 /* Slop distance for jumpy pointer detection. 893 * The vertical range of the screen divided by this is our epsilon value. */ 894 static const uint32_t JUMPY_EPSILON_DIVISOR = 212; 895 896 /* Number of jumpy points to drop for touchscreens that need it. */ 897 static const uint32_t JUMPY_TRANSITION_DROPS = 3; 898 static const uint32_t JUMPY_DROP_LIMIT = 3; 899 900 /* Maximum squared distance for averaging. 901 * If moving farther than this, turn of averaging to avoid lag in response. */ 902 static const uint64_t AVERAGING_DISTANCE_LIMIT = 75 * 75; 903 904 struct AveragingTouchFilterState { 905 // Individual history tracks are stored by pointer id 906 uint32_t historyStart[MAX_POINTERS]; 907 uint32_t historyEnd[MAX_POINTERS]; 908 struct { 909 struct { 910 int32_t x; 911 int32_t y; 912 int32_t pressure; 913 } pointers[MAX_POINTERS]; 914 } historyData[AVERAGING_HISTORY_SIZE]; 915 } mAveragingTouchFilter; 916 917 struct JumpyTouchFilterState { 918 uint32_t jumpyPointsDropped; 919 } mJumpyTouchFilter; 920 921 struct PointerDistanceHeapElement { 922 uint32_t currentPointerIndex : 8; 923 uint32_t lastPointerIndex : 8; 924 uint64_t distance : 48; // squared distance 925 }; 926 927 struct PointerGesture { 928 enum Mode { 929 // No fingers, button is not pressed. 930 // Nothing happening. 931 NEUTRAL, 932 933 // No fingers, button is not pressed. 934 // Tap detected. 935 // Emits DOWN and UP events at the pointer location. 936 TAP, 937 938 // Button is pressed. 939 // Pointer follows the active finger if there is one. Other fingers are ignored. 940 // Emits DOWN, MOVE and UP events at the pointer location. 941 CLICK_OR_DRAG, 942 943 // Exactly one finger, button is not pressed. 944 // Pointer follows the active finger. 945 // Emits HOVER_MOVE events at the pointer location. 946 HOVER, 947 948 // Exactly two fingers but neither have moved enough to clearly indicate 949 // whether a swipe or freeform gesture was intended. We consider the 950 // pointer to be pressed so this enables clicking or long-pressing on buttons. 951 // Pointer does not move. 952 // Emits DOWN, MOVE and UP events with a single stationary pointer coordinate. 953 PRESS, 954 955 // Exactly two fingers moving in the same direction, button is not pressed. 956 // Pointer does not move. 957 // Emits DOWN, MOVE and UP events with a single pointer coordinate that 958 // follows the midpoint between both fingers. 959 SWIPE, 960 961 // Two or more fingers moving in arbitrary directions, button is not pressed. 962 // Pointer does not move. 963 // Emits DOWN, POINTER_DOWN, MOVE, POINTER_UP and UP events that follow 964 // each finger individually relative to the initial centroid of the finger. 965 FREEFORM, 966 967 // Waiting for quiet time to end before starting the next gesture. 968 QUIET, 969 }; 970 971 // Time the first finger went down. 972 nsecs_t firstTouchTime; 973 974 // The active pointer id from the raw touch data. 975 int32_t activeTouchId; // -1 if none 976 977 // The active pointer id from the gesture last delivered to the application. 978 int32_t activeGestureId; // -1 if none 979 980 // Pointer coords and ids for the current and previous pointer gesture. 981 Mode currentGestureMode; 982 BitSet32 currentGestureIdBits; 983 uint32_t currentGestureIdToIndex[MAX_POINTER_ID + 1]; 984 PointerCoords currentGestureCoords[MAX_POINTERS]; 985 986 Mode lastGestureMode; 987 BitSet32 lastGestureIdBits; 988 uint32_t lastGestureIdToIndex[MAX_POINTER_ID + 1]; 989 PointerCoords lastGestureCoords[MAX_POINTERS]; 990 991 // Pointer coords and ids for the current spots. 992 PointerControllerInterface::SpotGesture spotGesture; 993 BitSet32 spotIdBits; // same set of ids as touch ids 994 uint32_t spotIdToIndex[MAX_POINTER_ID + 1]; 995 PointerCoords spotCoords[MAX_POINTERS]; 996 997 // Time the pointer gesture last went down. 998 nsecs_t downTime; 999 1000 // Time we started waiting for a tap gesture. 1001 nsecs_t tapTime; 1002 1003 // Location of initial tap. 1004 float tapX, tapY; 1005 1006 // Time we started waiting for quiescence. 1007 nsecs_t quietTime; 1008 1009 // Reference points for multitouch gestures. 1010 float referenceTouchX; // reference touch X/Y coordinates in surface units 1011 float referenceTouchY; 1012 float referenceGestureX; // reference gesture X/Y coordinates in pixels 1013 float referenceGestureY; 1014 1015 // Describes how touch ids are mapped to gesture ids for freeform gestures. 1016 uint32_t freeformTouchToGestureIdMap[MAX_POINTER_ID + 1]; 1017 1018 // A velocity tracker for determining whether to switch active pointers during drags. 1019 VelocityTracker velocityTracker; 1020 1021 void reset() { 1022 firstTouchTime = LLONG_MIN; 1023 activeTouchId = -1; 1024 activeGestureId = -1; 1025 currentGestureMode = NEUTRAL; 1026 currentGestureIdBits.clear(); 1027 lastGestureMode = NEUTRAL; 1028 lastGestureIdBits.clear(); 1029 spotGesture = PointerControllerInterface::SPOT_GESTURE_NEUTRAL; 1030 spotIdBits.clear(); 1031 downTime = 0; 1032 velocityTracker.clear(); 1033 resetTapTime(); 1034 resetQuietTime(); 1035 } 1036 1037 void resetTapTime() { 1038 tapTime = LLONG_MIN; 1039 } 1040 1041 void resetQuietTime() { 1042 quietTime = LLONG_MIN; 1043 } 1044 } mPointerGesture; 1045 1046 void initializeLocked(); 1047 1048 TouchResult consumeOffScreenTouches(nsecs_t when, uint32_t policyFlags); 1049 void dispatchTouches(nsecs_t when, uint32_t policyFlags); 1050 void prepareTouches(int32_t* outEdgeFlags, float* outXPrecision, float* outYPrecision); 1051 void dispatchPointerGestures(nsecs_t when, uint32_t policyFlags); 1052 void preparePointerGestures(nsecs_t when, 1053 bool* outCancelPreviousGesture, bool* outFinishPreviousGesture); 1054 void moveSpotsLocked(); 1055 1056 // Dispatches a motion event. 1057 // If the changedId is >= 0 and the action is POINTER_DOWN or POINTER_UP, the 1058 // method will take care of setting the index and transmuting the action to DOWN or UP 1059 // it is the first / last pointer to go down / up. 1060 void dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source, 1061 int32_t action, int32_t flags, uint32_t metaState, int32_t edgeFlags, 1062 const PointerCoords* coords, const uint32_t* idToIndex, BitSet32 idBits, 1063 int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime); 1064 1065 // Updates pointer coords for pointers with specified ids that have moved. 1066 // Returns true if any of them changed. 1067 bool updateMovedPointerCoords(const PointerCoords* inCoords, const uint32_t* inIdToIndex, 1068 PointerCoords* outCoords, const uint32_t* outIdToIndex, BitSet32 idBits) const; 1069 1070 void suppressSwipeOntoVirtualKeys(nsecs_t when); 1071 1072 bool isPointInsideSurfaceLocked(int32_t x, int32_t y); 1073 const VirtualKey* findVirtualKeyHitLocked(int32_t x, int32_t y); 1074 1075 bool applyBadTouchFilter(); 1076 bool applyJumpyTouchFilter(); 1077 void applyAveragingTouchFilter(); 1078 void calculatePointerIds(); 1079}; 1080 1081 1082class SingleTouchInputMapper : public TouchInputMapper { 1083public: 1084 SingleTouchInputMapper(InputDevice* device); 1085 virtual ~SingleTouchInputMapper(); 1086 1087 virtual void reset(); 1088 virtual void process(const RawEvent* rawEvent); 1089 1090protected: 1091 virtual void configureRawAxes(); 1092 1093private: 1094 struct Accumulator { 1095 enum { 1096 FIELD_BTN_TOUCH = 1, 1097 FIELD_ABS_X = 2, 1098 FIELD_ABS_Y = 4, 1099 FIELD_ABS_PRESSURE = 8, 1100 FIELD_ABS_TOOL_WIDTH = 16, 1101 FIELD_BUTTONS = 32, 1102 }; 1103 1104 uint32_t fields; 1105 1106 bool btnTouch; 1107 int32_t absX; 1108 int32_t absY; 1109 int32_t absPressure; 1110 int32_t absToolWidth; 1111 1112 uint32_t buttonDown; 1113 uint32_t buttonUp; 1114 1115 inline void clear() { 1116 fields = 0; 1117 buttonDown = 0; 1118 buttonUp = 0; 1119 } 1120 } mAccumulator; 1121 1122 bool mDown; 1123 int32_t mX; 1124 int32_t mY; 1125 int32_t mPressure; 1126 int32_t mToolWidth; 1127 uint32_t mButtonState; 1128 1129 void initialize(); 1130 1131 void sync(nsecs_t when); 1132}; 1133 1134 1135class MultiTouchInputMapper : public TouchInputMapper { 1136public: 1137 MultiTouchInputMapper(InputDevice* device); 1138 virtual ~MultiTouchInputMapper(); 1139 1140 virtual void reset(); 1141 virtual void process(const RawEvent* rawEvent); 1142 1143protected: 1144 virtual void configureRawAxes(); 1145 1146private: 1147 struct Accumulator { 1148 enum { 1149 FIELD_ABS_MT_POSITION_X = 1, 1150 FIELD_ABS_MT_POSITION_Y = 2, 1151 FIELD_ABS_MT_TOUCH_MAJOR = 4, 1152 FIELD_ABS_MT_TOUCH_MINOR = 8, 1153 FIELD_ABS_MT_WIDTH_MAJOR = 16, 1154 FIELD_ABS_MT_WIDTH_MINOR = 32, 1155 FIELD_ABS_MT_ORIENTATION = 64, 1156 FIELD_ABS_MT_TRACKING_ID = 128, 1157 FIELD_ABS_MT_PRESSURE = 256, 1158 }; 1159 1160 uint32_t pointerCount; 1161 struct Pointer { 1162 uint32_t fields; 1163 1164 int32_t absMTPositionX; 1165 int32_t absMTPositionY; 1166 int32_t absMTTouchMajor; 1167 int32_t absMTTouchMinor; 1168 int32_t absMTWidthMajor; 1169 int32_t absMTWidthMinor; 1170 int32_t absMTOrientation; 1171 int32_t absMTTrackingId; 1172 int32_t absMTPressure; 1173 1174 inline void clear() { 1175 fields = 0; 1176 } 1177 } pointers[MAX_POINTERS + 1]; // + 1 to remove the need for extra range checks 1178 1179 // Bitfield of buttons that went down or up. 1180 uint32_t buttonDown; 1181 uint32_t buttonUp; 1182 1183 inline void clear() { 1184 pointerCount = 0; 1185 pointers[0].clear(); 1186 buttonDown = 0; 1187 buttonUp = 0; 1188 } 1189 } mAccumulator; 1190 1191 uint32_t mButtonState; 1192 1193 void initialize(); 1194 1195 void sync(nsecs_t when); 1196}; 1197 1198 1199class JoystickInputMapper : public InputMapper { 1200public: 1201 JoystickInputMapper(InputDevice* device); 1202 virtual ~JoystickInputMapper(); 1203 1204 virtual uint32_t getSources(); 1205 virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); 1206 virtual void dump(String8& dump); 1207 virtual void configure(); 1208 virtual void reset(); 1209 virtual void process(const RawEvent* rawEvent); 1210 1211private: 1212 struct Axis { 1213 RawAbsoluteAxisInfo rawAxisInfo; 1214 AxisInfo axisInfo; 1215 1216 bool explicitlyMapped; // true if the axis was explicitly assigned an axis id 1217 1218 float scale; // scale factor from raw to normalized values 1219 float offset; // offset to add after scaling for normalization 1220 float highScale; // scale factor from raw to normalized values of high split 1221 float highOffset; // offset to add after scaling for normalization of high split 1222 1223 float min; // normalized inclusive minimum 1224 float max; // normalized inclusive maximum 1225 float flat; // normalized flat region size 1226 float fuzz; // normalized error tolerance 1227 1228 float filter; // filter out small variations of this size 1229 float currentValue; // current value 1230 float newValue; // most recent value 1231 float highCurrentValue; // current value of high split 1232 float highNewValue; // most recent value of high split 1233 1234 void initialize(const RawAbsoluteAxisInfo& rawAxisInfo, const AxisInfo& axisInfo, 1235 bool explicitlyMapped, float scale, float offset, 1236 float highScale, float highOffset, 1237 float min, float max, float flat, float fuzz) { 1238 this->rawAxisInfo = rawAxisInfo; 1239 this->axisInfo = axisInfo; 1240 this->explicitlyMapped = explicitlyMapped; 1241 this->scale = scale; 1242 this->offset = offset; 1243 this->highScale = highScale; 1244 this->highOffset = highOffset; 1245 this->min = min; 1246 this->max = max; 1247 this->flat = flat; 1248 this->fuzz = fuzz; 1249 this->filter = 0; 1250 resetValue(); 1251 } 1252 1253 void resetValue() { 1254 this->currentValue = 0; 1255 this->newValue = 0; 1256 this->highCurrentValue = 0; 1257 this->highNewValue = 0; 1258 } 1259 }; 1260 1261 // Axes indexed by raw ABS_* axis index. 1262 KeyedVector<int32_t, Axis> mAxes; 1263 1264 void sync(nsecs_t when, bool force); 1265 1266 bool haveAxis(int32_t axisId); 1267 void pruneAxes(bool ignoreExplicitlyMappedAxes); 1268 bool filterAxes(bool force); 1269 1270 static bool hasValueChangedSignificantly(float filter, 1271 float newValue, float currentValue, float min, float max); 1272 static bool hasMovedNearerToValueWithinFilteredRange(float filter, 1273 float newValue, float currentValue, float thresholdValue); 1274 1275 static bool isCenteredAxis(int32_t axis); 1276}; 1277 1278} // namespace android 1279 1280#endif // _UI_INPUT_READER_H 1281