diff --git a/include/ui/EventHub.h b/include/ui/EventHub.h
index 5be17d3..dab35b3 100644
--- a/include/ui/EventHub.h
+++ b/include/ui/EventHub.h
@@ -60,6 +60,31 @@
 class KeyLayoutMap;
 
 /*
+ * A raw event as retrieved from the EventHub.
+ */
+struct RawEvent {
+    nsecs_t when;
+    int32_t deviceId;
+    int32_t type;
+    int32_t scanCode;
+    int32_t keyCode;
+    int32_t value;
+    uint32_t flags;
+};
+
+/* Describes an absolute axis. */
+struct RawAbsoluteAxisInfo {
+    bool valid; // true if the information is valid, false otherwise
+
+    int32_t minValue;  // minimum value
+    int32_t maxValue;  // maximum value
+    int32_t flat;      // center flat position, eg. flat == 8 means center is between -8 and 8
+    int32_t fuzz;      // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise
+
+    inline int32_t getRange() { return maxValue - minValue; }
+};
+
+/*
  * Input device classes.
  */
 enum {
@@ -82,7 +107,10 @@
     INPUT_DEVICE_CLASS_DPAD          = 0x00000020,
 
     /* The input device is a gamepad (implies keyboard). */
-    INPUT_DEVICE_CLASS_GAMEPAD       = 0x00000040
+    INPUT_DEVICE_CLASS_GAMEPAD       = 0x00000040,
+
+    /* The input device has switches. */
+    INPUT_DEVICE_CLASS_SWITCH        = 0x00000080,
 };
 
 /*
@@ -114,8 +142,8 @@
 
     virtual String8 getDeviceName(int32_t deviceId) const = 0;
 
-    virtual int getAbsoluteInfo(int32_t deviceId, int axis, int *outMinValue,
-            int* outMaxValue, int* outFlat, int* outFuzz) const = 0;
+    virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+            RawAbsoluteAxisInfo* outAxisInfo) const = 0;
 
     virtual status_t scancodeToKeycode(int32_t deviceId, int scancode,
             int32_t* outKeycode, uint32_t* outFlags) const = 0;
@@ -131,26 +159,19 @@
      * If the device needs to remain awake longer than that, then the caller is responsible
      * for taking care of it (say, by poking the power manager user activity timer).
      */
-    virtual bool getEvent(int32_t* outDeviceId, int32_t* outType,
-            int32_t* outScancode, int32_t* outKeycode, uint32_t *outFlags,
-            int32_t* outValue, nsecs_t* outWhen) = 0;
+    virtual bool getEvent(RawEvent* outEvent) = 0;
 
     /*
      * Query current input state.
-     *   deviceId may be -1 to search for the device automatically, filtered by class.
-     *   deviceClasses may be -1 to ignore device class while searching.
      */
-    virtual int32_t getScanCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t scanCode) const = 0;
-    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t keyCode) const = 0;
-    virtual int32_t getSwitchState(int32_t deviceId, int32_t deviceClasses,
-            int32_t sw) const = 0;
+    virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const = 0;
+    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const = 0;
+    virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const = 0;
 
     /*
      * Examine key input devices for specific framework keycode support
      */
-    virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes,
+    virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
             uint8_t* outFlags) const = 0;
 };
 
@@ -165,33 +186,28 @@
     
     virtual String8 getDeviceName(int32_t deviceId) const;
     
-    virtual int getAbsoluteInfo(int32_t deviceId, int axis, int *outMinValue,
-            int* outMaxValue, int* outFlat, int* outFuzz) const;
-        
+    virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+            RawAbsoluteAxisInfo* outAxisInfo) const;
+
     virtual status_t scancodeToKeycode(int32_t deviceId, int scancode,
             int32_t* outKeycode, uint32_t* outFlags) const;
 
     virtual void addExcludedDevice(const char* deviceName);
 
-    virtual int32_t getScanCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t scanCode) const;
-    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t keyCode) const;
-    virtual int32_t getSwitchState(int32_t deviceId, int32_t deviceClasses,
-            int32_t sw) const;
+    virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const;
+    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const;
+    virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const;
 
-    virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const;
+    virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags) const;
 
-    virtual bool getEvent(int32_t* outDeviceId, int32_t* outType,
-            int32_t* outScancode, int32_t* outKeycode, uint32_t *outFlags,
-            int32_t* outValue, nsecs_t* outWhen);
+    virtual bool getEvent(RawEvent* outEvent);
 
 protected:
     virtual ~EventHub();
     
 private:
     bool openPlatformInput(void);
-    int32_t convertDeviceKey_TI_P2(int code);
 
     int open_device(const char *device);
     int close_device(const char *device);
@@ -220,6 +236,8 @@
     int32_t getScanCodeStateLocked(device_t* device, int32_t scanCode) const;
     int32_t getKeyCodeStateLocked(device_t* device, int32_t keyCode) const;
     int32_t getSwitchStateLocked(device_t* device, int32_t sw) const;
+    bool markSupportedKeyCodesLocked(device_t* device, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags) const;
 
     // Protect all internal state.
     mutable Mutex   mLock;
diff --git a/include/ui/Input.h b/include/ui/Input.h
index d9b1091..2385973 100644
--- a/include/ui/Input.h
+++ b/include/ui/Input.h
@@ -23,7 +23,10 @@
 
 #include <android/input.h>
 #include <utils/Vector.h>
+#include <utils/KeyedVector.h>
 #include <utils/Timers.h>
+#include <utils/RefBase.h>
+#include <utils/String8.h>
 
 /*
  * Additional private constants not defined in ndk/ui/input.h.
@@ -47,21 +50,16 @@
     virtual ~AInputEvent() { }
 };
 
-namespace android {
-
 /*
- * A raw event as retrieved from the EventHub.
+ * Declare a concrete type for the NDK's input device forward declaration.
  */
-struct RawEvent {
-    nsecs_t when;
-    int32_t deviceId;
-    int32_t type;
-    int32_t scanCode;
-    int32_t keyCode;
-    int32_t value;
-    uint32_t flags;
+struct AInputDevice {
+    virtual ~AInputDevice() { }
 };
 
+
+namespace android {
+
 /*
  * Flags that flow alongside events in the input dispatch system to help with certain
  * policy decisions such as waking from device sleep.
@@ -424,6 +422,69 @@
     MotionEvent mMotionEvent;
 };
 
+/*
+ * Describes the characteristics and capabilities of an input device.
+ */
+class InputDeviceInfo {
+public:
+    InputDeviceInfo();
+    InputDeviceInfo(const InputDeviceInfo& other);
+    ~InputDeviceInfo();
+
+    struct MotionRange {
+        float min;
+        float max;
+        float flat;
+        float fuzz;
+    };
+
+    void initialize(int32_t id, const String8& name);
+
+    inline int32_t getId() const { return mId; }
+    inline const String8 getName() const { return mName; }
+    inline uint32_t getSources() const { return mSources; }
+
+    const MotionRange* getMotionRange(int32_t rangeType) const;
+
+    void addSource(uint32_t source);
+    void addMotionRange(int32_t rangeType, float min, float max, float flat, float fuzz);
+    void addMotionRange(int32_t rangeType, const MotionRange& range);
+
+    inline void setKeyboardType(int32_t keyboardType) { mKeyboardType = keyboardType; }
+    inline int32_t getKeyboardType() const { return mKeyboardType; }
+
+private:
+    int32_t mId;
+    String8 mName;
+    uint32_t mSources;
+    int32_t mKeyboardType;
+
+    KeyedVector<int32_t, MotionRange> mMotionRanges;
+};
+
+/*
+ * Provides remote access to information about an input device.
+ *
+ * Note: This is essentially a wrapper for Binder calls into the Window Manager Service.
+ */
+class InputDeviceProxy : public RefBase, public AInputDevice {
+protected:
+    InputDeviceProxy();
+    virtual ~InputDeviceProxy();
+
+public:
+    static void getDeviceIds(Vector<int32_t>& outIds);
+
+    static sp<InputDeviceProxy> getDevice(int32_t id);
+
+    inline const InputDeviceInfo* getInfo() { return & mInfo; }
+
+    // TODO add hasKeys, keymap, etc...
+
+private:
+    InputDeviceInfo mInfo;
+};
+
 
 } // namespace android
 
diff --git a/include/ui/InputDevice.h b/include/ui/InputDevice.h
deleted file mode 100644
index 3b9c70e..0000000
--- a/include/ui/InputDevice.h
+++ /dev/null
@@ -1,353 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef _UI_INPUT_DEVICE_H
-#define _UI_INPUT_DEVICE_H
-
-#include <ui/EventHub.h>
-#include <ui/Input.h>
-#include <utils/KeyedVector.h>
-#include <utils/threads.h>
-#include <utils/Timers.h>
-#include <utils/RefBase.h>
-#include <utils/String8.h>
-#include <utils/BitSet.h>
-
-#include <stddef.h>
-#include <unistd.h>
-
-/* Maximum pointer id value supported.
- * (This is limited by our use of BitSet32 to track pointer assignments.) */
-#define MAX_POINTER_ID 31
-
-/* Maximum number of historical samples to average. */
-#define AVERAGING_HISTORY_SIZE 5
-
-
-namespace android {
-
-extern int32_t updateMetaState(int32_t keyCode, bool down, int32_t oldMetaState);
-extern int32_t rotateKeyCode(int32_t keyCode, int32_t orientation);
-
-
-/*
- * An input device structure tracks the state of a single input device.
- *
- * This structure is only used by ReaderThread and is not intended to be shared with
- * DispatcherThread (because that would require locking).  This works out fine because
- * DispatcherThread is only interested in cooked event data anyways and does not need
- * any of the low-level data from InputDevice.
- */
-struct InputDevice {
-    struct AbsoluteAxisInfo {
-        bool valid;        // set to true if axis parameters are known, false otherwise
-
-        int32_t minValue;  // minimum value
-        int32_t maxValue;  // maximum value
-        int32_t range;     // range of values, equal to maxValue - minValue
-        int32_t flat;      // center flat position, eg. flat == 8 means center is between -8 and 8
-        int32_t fuzz;      // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise
-    };
-
-    struct VirtualKey {
-        int32_t keyCode;
-        int32_t scanCode;
-        uint32_t flags;
-
-        // computed hit box, specified in touch screen coords based on known display size
-        int32_t hitLeft;
-        int32_t hitTop;
-        int32_t hitRight;
-        int32_t hitBottom;
-
-        inline bool isHit(int32_t x, int32_t y) const {
-            return x >= hitLeft && x <= hitRight && y >= hitTop && y <= hitBottom;
-        }
-    };
-
-    struct KeyboardState {
-        struct Current {
-            int32_t metaState;
-            nsecs_t downTime; // time of most recent key down
-        } current;
-
-        void reset();
-    };
-
-    struct TrackballState {
-        struct Accumulator {
-            enum {
-                FIELD_BTN_MOUSE = 1,
-                FIELD_REL_X = 2,
-                FIELD_REL_Y = 4
-            };
-
-            uint32_t fields;
-
-            bool btnMouse;
-            int32_t relX;
-            int32_t relY;
-
-            inline void clear() {
-                fields = 0;
-            }
-
-            inline bool isDirty() {
-                return fields != 0;
-            }
-        } accumulator;
-
-        struct Current {
-            bool down;
-            nsecs_t downTime;
-        } current;
-
-        struct Precalculated {
-            float xScale;
-            float yScale;
-            float xPrecision;
-            float yPrecision;
-        } precalculated;
-
-        void reset();
-    };
-
-    struct SingleTouchScreenState {
-        struct Accumulator {
-            enum {
-                FIELD_BTN_TOUCH = 1,
-                FIELD_ABS_X = 2,
-                FIELD_ABS_Y = 4,
-                FIELD_ABS_PRESSURE = 8,
-                FIELD_ABS_TOOL_WIDTH = 16
-            };
-
-            uint32_t fields;
-
-            bool btnTouch;
-            int32_t absX;
-            int32_t absY;
-            int32_t absPressure;
-            int32_t absToolWidth;
-
-            inline void clear() {
-                fields = 0;
-            }
-
-            inline bool isDirty() {
-                return fields != 0;
-            }
-        } accumulator;
-
-        struct Current {
-            bool down;
-            int32_t x;
-            int32_t y;
-            int32_t pressure;
-            int32_t size;
-        } current;
-
-        void reset();
-    };
-
-    struct MultiTouchScreenState {
-        struct Accumulator {
-            enum {
-                FIELD_ABS_MT_POSITION_X = 1,
-                FIELD_ABS_MT_POSITION_Y = 2,
-                FIELD_ABS_MT_TOUCH_MAJOR = 4,
-                FIELD_ABS_MT_TOUCH_MINOR = 8,
-                FIELD_ABS_MT_WIDTH_MAJOR = 16,
-                FIELD_ABS_MT_WIDTH_MINOR = 32,
-                FIELD_ABS_MT_ORIENTATION = 64,
-                FIELD_ABS_MT_TRACKING_ID = 128
-            };
-
-            uint32_t pointerCount;
-            struct Pointer {
-                uint32_t fields;
-
-                int32_t absMTPositionX;
-                int32_t absMTPositionY;
-                int32_t absMTTouchMajor;
-                int32_t absMTTouchMinor;
-                int32_t absMTWidthMajor;
-                int32_t absMTWidthMinor;
-                int32_t absMTOrientation;
-                int32_t absMTTrackingId;
-
-                inline void clear() {
-                    fields = 0;
-                }
-            } pointers[MAX_POINTERS + 1]; // + 1 to remove the need for extra range checks
-
-            inline void clear() {
-                pointerCount = 0;
-                pointers[0].clear();
-            }
-
-            inline bool isDirty() {
-                return pointerCount != 0;
-            }
-        } accumulator;
-
-        void reset();
-    };
-
-    struct PointerData {
-        uint32_t id;
-        int32_t x;
-        int32_t y;
-        int32_t pressure;
-        int32_t size;
-        int32_t touchMajor;
-        int32_t touchMinor;
-        int32_t toolMajor;
-        int32_t toolMinor;
-        int32_t orientation;
-    };
-
-    struct TouchData {
-        uint32_t pointerCount;
-        PointerData pointers[MAX_POINTERS];
-        BitSet32 idBits;
-        uint32_t idToIndex[MAX_POINTER_ID + 1];
-
-        void copyFrom(const TouchData& other);
-
-        inline void clear() {
-            pointerCount = 0;
-            idBits.clear();
-        }
-    };
-
-    // common state used for both single-touch and multi-touch screens after the initial
-    // touch decoding has been performed
-    struct TouchScreenState {
-        Vector<VirtualKey> virtualKeys;
-
-        struct Parameters {
-            bool useBadTouchFilter;
-            bool useJumpyTouchFilter;
-            bool useAveragingTouchFilter;
-
-            AbsoluteAxisInfo xAxis;
-            AbsoluteAxisInfo yAxis;
-            AbsoluteAxisInfo pressureAxis;
-            AbsoluteAxisInfo sizeAxis;
-            AbsoluteAxisInfo orientationAxis;
-        } parameters;
-
-        // The touch data of the current sample being processed.
-        TouchData currentTouch;
-
-        // The touch data of the previous sample that was processed.  This is updated
-        // incrementally while the current sample is being processed.
-        TouchData lastTouch;
-
-        // The time the primary pointer last went down.
-        nsecs_t downTime;
-
-        struct CurrentVirtualKeyState {
-            enum Status {
-                STATUS_UP,
-                STATUS_DOWN,
-                STATUS_CANCELED
-            };
-
-            Status status;
-            nsecs_t downTime;
-            int32_t keyCode;
-            int32_t scanCode;
-        } currentVirtualKey;
-
-        struct AveragingTouchFilterState {
-            // Individual history tracks are stored by pointer id
-            uint32_t historyStart[MAX_POINTERS];
-            uint32_t historyEnd[MAX_POINTERS];
-            struct {
-                struct {
-                    int32_t x;
-                    int32_t y;
-                    int32_t pressure;
-                } pointers[MAX_POINTERS];
-            } historyData[AVERAGING_HISTORY_SIZE];
-        } averagingTouchFilter;
-
-        struct JumpTouchFilterState {
-            int32_t jumpyPointsDropped;
-        } jumpyTouchFilter;
-
-        struct Precalculated {
-            int32_t xOrigin;
-            float xScale;
-
-            int32_t yOrigin;
-            float yScale;
-
-            int32_t pressureOrigin;
-            float pressureScale;
-
-            int32_t sizeOrigin;
-            float sizeScale;
-
-            float orientationScale;
-        } precalculated;
-
-        void reset();
-
-        bool applyBadTouchFilter();
-        bool applyJumpyTouchFilter();
-        void applyAveragingTouchFilter();
-        void calculatePointerIds();
-
-        bool isPointInsideDisplay(int32_t x, int32_t y) const;
-        const InputDevice::VirtualKey* findVirtualKeyHit() const;
-    };
-
-    InputDevice(int32_t id, uint32_t classes, String8 name);
-
-    int32_t id;
-    uint32_t classes;
-    String8 name;
-    bool ignored;
-
-    KeyboardState keyboard;
-    TrackballState trackball;
-    TouchScreenState touchScreen;
-    union {
-        SingleTouchScreenState singleTouchScreen;
-        MultiTouchScreenState multiTouchScreen;
-    };
-
-    void reset();
-
-    inline bool isKeyboard() const { return classes & INPUT_DEVICE_CLASS_KEYBOARD; }
-    inline bool isAlphaKey() const { return classes & INPUT_DEVICE_CLASS_ALPHAKEY; }
-    inline bool isTrackball() const { return classes & INPUT_DEVICE_CLASS_TRACKBALL; }
-    inline bool isDPad() const { return classes & INPUT_DEVICE_CLASS_DPAD; }
-    inline bool isSingleTouchScreen() const { return (classes
-            & (INPUT_DEVICE_CLASS_TOUCHSCREEN | INPUT_DEVICE_CLASS_TOUCHSCREEN_MT))
-            == INPUT_DEVICE_CLASS_TOUCHSCREEN; }
-    inline bool isMultiTouchScreen() const { return classes
-            & INPUT_DEVICE_CLASS_TOUCHSCREEN_MT; }
-    inline bool isTouchScreen() const { return classes
-            & (INPUT_DEVICE_CLASS_TOUCHSCREEN | INPUT_DEVICE_CLASS_TOUCHSCREEN_MT); }
-};
-
-} // namespace android
-
-#endif // _UI_INPUT_DEVICE_H
diff --git a/include/ui/InputManager.h b/include/ui/InputManager.h
index e755238..7ebec10 100644
--- a/include/ui/InputManager.h
+++ b/include/ui/InputManager.h
@@ -96,22 +96,28 @@
     virtual void preemptInputDispatch() = 0;
 
     /* Gets input device configuration. */
-    virtual void getInputConfiguration(InputConfiguration* outConfiguration) const = 0;
+    virtual void getInputConfiguration(InputConfiguration* outConfiguration) = 0;
 
-    /*
-     * Queries current input state.
-     *   deviceId may be -1 to search for the device automatically, filtered by class.
-     *   deviceClasses may be -1 to ignore device class while searching.
+    /* Gets information about the specified input device.
+     * Returns OK if the device information was obtained or NAME_NOT_FOUND if there
+     * was no such device.
      */
-    virtual int32_t getScanCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t scanCode) const = 0;
-    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t keyCode) const = 0;
-    virtual int32_t getSwitchState(int32_t deviceId, int32_t deviceClasses,
-            int32_t sw) const = 0;
+    virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo) = 0;
+
+    /* Gets the list of all registered device ids. */
+    virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds) = 0;
+
+    /* Queries current input state. */
+    virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t scanCode) = 0;
+    virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t keyCode) = 0;
+    virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask,
+            int32_t sw) = 0;
 
     /* Determines whether physical keys exist for the given framework-domain key codes. */
-    virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const = 0;
+    virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask,
+            size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) = 0;
 };
 
 class InputManager : public InputManagerInterface {
@@ -140,14 +146,17 @@
 
     virtual void preemptInputDispatch();
 
-    virtual void getInputConfiguration(InputConfiguration* outConfiguration) const;
-    virtual int32_t getScanCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t scanCode) const;
-    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t keyCode) const;
-    virtual int32_t getSwitchState(int32_t deviceId, int32_t deviceClasses,
-            int32_t sw) const;
-    virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const;
+    virtual void getInputConfiguration(InputConfiguration* outConfiguration);
+    virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo);
+    virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds);
+    virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t scanCode);
+    virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t keyCode);
+    virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask,
+            int32_t sw);
+    virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask,
+            size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags);
 
 private:
     sp<InputReaderInterface> mReader;
diff --git a/include/ui/InputReader.h b/include/ui/InputReader.h
index 14bea65..d7ec8ea 100644
--- a/include/ui/InputReader.h
+++ b/include/ui/InputReader.h
@@ -19,7 +19,6 @@
 
 #include <ui/EventHub.h>
 #include <ui/Input.h>
-#include <ui/InputDevice.h>
 #include <ui/InputDispatcher.h>
 #include <utils/KeyedVector.h>
 #include <utils/threads.h>
@@ -33,6 +32,10 @@
 
 namespace android {
 
+class InputDevice;
+class InputMapper;
+
+
 /*
  * Input reader policy interface.
  *
@@ -68,14 +71,6 @@
         // The input dispatcher should perform special filtering in preparation for
         // a pending app switch.
         ACTION_APP_SWITCH_COMING = 0x00000002,
-
-        // The input dispatcher should add POLICY_FLAG_WOKE_HERE to the policy flags it
-        // passes through the dispatch pipeline.
-        ACTION_WOKE_HERE = 0x00000004,
-
-        // The input dispatcher should add POLICY_FLAG_BRIGHT_HERE to the policy flags it
-        // passes through the dispatch pipeline.
-        ACTION_BRIGHT_HERE = 0x00000008,
     };
 
     /* Describes a virtual key. */
@@ -101,38 +96,30 @@
 
     /* Intercepts a key event.
      * The policy can use this method as an opportunity to perform power management functions
-     * and early event preprocessing.
+     * and early event preprocessing such as updating policy flags.
      *
      * Returns a policy action constant such as ACTION_DISPATCH.
      */
     virtual int32_t interceptKey(nsecs_t when, int32_t deviceId,
-            bool down, int32_t keyCode, int32_t scanCode, uint32_t policyFlags) = 0;
-
-    /* Intercepts a trackball event.
-     * The policy can use this method as an opportunity to perform power management functions
-     * and early event preprocessing.
-     *
-     * Returns a policy action constant such as ACTION_DISPATCH.
-     */
-    virtual int32_t interceptTrackball(nsecs_t when, bool buttonChanged, bool buttonDown,
-            bool rolled) = 0;
-
-    /* Intercepts a touch event.
-     * The policy can use this method as an opportunity to perform power management functions
-     * and early event preprocessing.
-     *
-     * Returns a policy action constant such as ACTION_DISPATCH.
-     */
-    virtual int32_t interceptTouch(nsecs_t when) = 0;
+            bool down, int32_t keyCode, int32_t scanCode, uint32_t& policyFlags) = 0;
 
     /* Intercepts a switch event.
      * The policy can use this method as an opportunity to perform power management functions
-     * and early event preprocessing.
+     * and early event preprocessing such as updating policy flags.
      *
      * Switches are not dispatched to applications so this method should
      * usually return ACTION_NONE.
      */
-    virtual int32_t interceptSwitch(nsecs_t when, int32_t switchCode, int32_t switchValue) = 0;
+    virtual int32_t interceptSwitch(nsecs_t when, int32_t switchCode, int32_t switchValue,
+            uint32_t& policyFlags) = 0;
+
+    /* Intercepts a generic touch, trackball or other event.
+     * The policy can use this method as an opportunity to perform power management functions
+     * and early event preprocessing such as updating policy flags.
+     *
+     * Returns a policy action constant such as ACTION_DISPATCH.
+     */
+    virtual int32_t interceptGeneric(nsecs_t when, uint32_t& policyFlags) = 0;
 
     /* Determines whether to turn on some hacks we have to improve the touch interaction with a
      * certain device whose screen currently is not all that good.
@@ -167,32 +154,52 @@
      */
     virtual void loopOnce() = 0;
 
-    /* Gets the current virtual key.  Returns false if not down.
-     *
-     * This method may be called on any thread (usually by the input manager).
-     */
-    virtual bool getCurrentVirtualKey(int32_t* outKeyCode, int32_t* outScanCode) const = 0;
-
     /* Gets the current input device configuration.
      *
      * This method may be called on any thread (usually by the input manager).
      */
-    virtual void getCurrentInputConfiguration(InputConfiguration* outConfiguration) const = 0;
+    virtual void getInputConfiguration(InputConfiguration* outConfiguration) = 0;
 
-    /*
-     * Query current input state.
-     *   deviceId may be -1 to search for the device automatically, filtered by class.
-     *   deviceClasses may be -1 to ignore device class while searching.
+    /* Gets information about the specified input device.
+     * Returns OK if the device information was obtained or NAME_NOT_FOUND if there
+     * was no such device.
+     *
+     * This method may be called on any thread (usually by the input manager).
      */
-    virtual int32_t getCurrentScanCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t scanCode) const = 0;
-    virtual int32_t getCurrentKeyCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t keyCode) const = 0;
-    virtual int32_t getCurrentSwitchState(int32_t deviceId, int32_t deviceClasses,
-            int32_t sw) const = 0;
+    virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo) = 0;
+
+    /* Gets the list of all registered device ids. */
+    virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds) = 0;
+
+    /* Query current input state. */
+    virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t scanCode) = 0;
+    virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t keyCode) = 0;
+    virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask,
+            int32_t sw) = 0;
 
     /* Determine whether physical keys exist for the given framework-domain key codes. */
-    virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const = 0;
+    virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask,
+            size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) = 0;
+};
+
+
+/* Internal interface used by individual input devices to access global input device state
+ * and parameters maintained by the input reader.
+ */
+class InputReaderContext {
+protected:
+    InputReaderContext() { }
+    virtual ~InputReaderContext() { }
+
+public:
+    virtual void updateGlobalMetaState() = 0;
+    virtual int32_t getGlobalMetaState() = 0;
+
+    virtual InputReaderPolicyInterface* getPolicy() = 0;
+    virtual InputDispatcherInterface* getDispatcher() = 0;
+    virtual EventHubInterface* getEventHub() = 0;
 };
 
 
@@ -201,10 +208,11 @@
  * event filtering in low power states, are controlled by a separate policy object.
  *
  * IMPORTANT INVARIANT:
- *     Because the policy can potentially block or cause re-entrance into the input reader,
- *     the input reader never calls into the policy while holding its internal locks.
+ *     Because the policy and dispatcher can potentially block or cause re-entrance into
+ *     the input reader, the input reader never calls into other components while holding
+ *     an exclusive internal lock.
  */
-class InputReader : public InputReaderInterface {
+class InputReader : public InputReaderInterface, private InputReaderContext {
 public:
     InputReader(const sp<EventHubInterface>& eventHub,
             const sp<InputReaderPolicyInterface>& policy,
@@ -213,107 +221,69 @@
 
     virtual void loopOnce();
 
-    virtual bool getCurrentVirtualKey(int32_t* outKeyCode, int32_t* outScanCode) const;
+    virtual void getInputConfiguration(InputConfiguration* outConfiguration);
 
-    virtual void getCurrentInputConfiguration(InputConfiguration* outConfiguration) const;
+    virtual status_t getInputDeviceInfo(int32_t deviceId, InputDeviceInfo* outDeviceInfo);
+    virtual void getInputDeviceIds(Vector<int32_t>& outDeviceIds);
 
-    virtual int32_t getCurrentScanCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t scanCode) const;
-    virtual int32_t getCurrentKeyCodeState(int32_t deviceId, int32_t deviceClasses,
-            int32_t keyCode) const;
-    virtual int32_t getCurrentSwitchState(int32_t deviceId, int32_t deviceClasses,
-            int32_t sw) const;
+    virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t scanCode);
+    virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t keyCode);
+    virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask,
+            int32_t sw);
 
-    virtual bool hasKeys(size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) const;
+    virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask,
+            size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags);
 
 private:
-    // Lock that must be acquired while manipulating state that may be concurrently accessed
-    // from other threads by input state query methods.  It should be held for as short a
-    // time as possible.
-    //
-    // Exported state:
-    //   - global virtual key code and scan code
-    //   - device list and immutable properties of devices such as id, name, and class
-    //     (but not other internal device state)
-    mutable Mutex mExportedStateLock;
-
-    // current virtual key information (lock mExportedStateLock)
-    int32_t mExportedVirtualKeyCode;
-    int32_t mExportedVirtualScanCode;
-
-    // current input configuration (lock mExportedStateLock)
-    InputConfiguration mExportedInputConfiguration;
-
-    // combined key meta state
-    int32_t mGlobalMetaState;
-
     sp<EventHubInterface> mEventHub;
     sp<InputReaderPolicyInterface> mPolicy;
     sp<InputDispatcherInterface> mDispatcher;
 
+    virtual InputReaderPolicyInterface* getPolicy() { return mPolicy.get(); }
+    virtual InputDispatcherInterface* getDispatcher() { return mDispatcher.get(); }
+    virtual EventHubInterface* getEventHub() { return mEventHub.get(); }
+
+    // This reader/writer lock guards the list of input devices.
+    // The writer lock must be held whenever the list of input devices is modified
+    //   and then promptly released.
+    // The reader lock must be held whenever the list of input devices is traversed or an
+    //   input device in the list is accessed.
+    // This lock only protects the registry and prevents inadvertent deletion of device objects
+    // that are in use.  Individual devices are responsible for guarding their own internal state
+    // as needed for concurrent operation.
+    RWLock mDeviceRegistryLock;
     KeyedVector<int32_t, InputDevice*> mDevices;
 
-    // display properties needed to translate touch screen coordinates into display coordinates
-    int32_t mDisplayOrientation;
-    int32_t mDisplayWidth;
-    int32_t mDisplayHeight;
-
-    // low-level input event decoding
+    // low-level input event decoding and device management
     void process(const RawEvent* rawEvent);
-    void handleDeviceAdded(const RawEvent* rawEvent);
-    void handleDeviceRemoved(const RawEvent* rawEvent);
-    void handleSync(const RawEvent* rawEvent);
-    void handleKey(const RawEvent* rawEvent);
-    void handleRelativeMotion(const RawEvent* rawEvent);
-    void handleAbsoluteMotion(const RawEvent* rawEvent);
-    void handleSwitch(const RawEvent* rawEvent);
 
-    // input policy processing and dispatch
-    void onKey(nsecs_t when, InputDevice* device, bool down,
-            int32_t keyCode, int32_t scanCode, uint32_t policyFlags);
-    void onSwitch(nsecs_t when, InputDevice* device, int32_t switchCode, int32_t switchValue);
-    void onSingleTouchScreenStateChanged(nsecs_t when, InputDevice* device);
-    void onMultiTouchScreenStateChanged(nsecs_t when, InputDevice* device);
-    void onTouchScreenChanged(nsecs_t when, InputDevice* device, bool havePointerIds);
-    void onTrackballStateChanged(nsecs_t when, InputDevice* device);
-    void onConfigurationChanged(nsecs_t when);
-
-    bool applyStandardInputDispatchPolicyActions(nsecs_t when,
-            int32_t policyActions, uint32_t* policyFlags);
-
-    bool consumeVirtualKeyTouches(nsecs_t when, InputDevice* device, uint32_t policyFlags);
-    void dispatchVirtualKey(nsecs_t when, InputDevice* device, uint32_t policyFlags,
-            int32_t keyEventAction, int32_t keyEventFlags);
-    void dispatchTouches(nsecs_t when, InputDevice* device, uint32_t policyFlags);
-    void dispatchTouch(nsecs_t when, InputDevice* device, uint32_t policyFlags,
-            InputDevice::TouchData* touch, BitSet32 idBits, uint32_t changedId,
-            int32_t motionEventAction);
-
-    // display
-    void resetDisplayProperties();
-    bool refreshDisplayProperties();
-
-    // device management
-    InputDevice* getDevice(int32_t deviceId);
-    InputDevice* getNonIgnoredDevice(int32_t deviceId);
     void addDevice(nsecs_t when, int32_t deviceId);
-    void removeDevice(nsecs_t when, InputDevice* device);
-    void configureDevice(InputDevice* device);
-    void configureDeviceForCurrentDisplaySize(InputDevice* device);
-    void configureVirtualKeys(InputDevice* device);
-    void configureAbsoluteAxisInfo(InputDevice* device, int axis, const char* name,
-            InputDevice::AbsoluteAxisInfo* out);
+    void removeDevice(nsecs_t when, int32_t deviceId);
+    InputDevice* createDevice(int32_t deviceId, const String8& name, uint32_t classes);
     void configureExcludedDevices();
 
-    // global meta state management for all devices
-    void resetGlobalMetaState();
-    int32_t globalMetaState();
+    void consumeEvent(const RawEvent* rawEvent);
 
-    // virtual key management
-    void updateExportedVirtualKeyState();
+    void handleConfigurationChanged(nsecs_t when);
 
-    // input configuration management
-    void updateExportedInputConfiguration();
+    // state management for all devices
+    Mutex mStateLock;
+
+    int32_t mGlobalMetaState;
+    virtual void updateGlobalMetaState();
+    virtual int32_t getGlobalMetaState();
+
+    InputConfiguration mInputConfiguration;
+    void updateInputConfiguration();
+
+    // state queries
+    typedef int32_t (InputDevice::*GetStateFunc)(uint32_t sourceMask, int32_t code);
+    int32_t getState(int32_t deviceId, uint32_t sourceMask, int32_t code,
+            GetStateFunc getStateFunc);
+    bool markSupportedKeyCodes(int32_t deviceId, uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
 };
 
 
@@ -329,6 +299,527 @@
     virtual bool threadLoop();
 };
 
+
+/* Represents the state of a single input device. */
+class InputDevice {
+public:
+    InputDevice(InputReaderContext* context, int32_t id, const String8& name);
+    ~InputDevice();
+
+    inline InputReaderContext* getContext() { return mContext; }
+    inline int32_t getId() { return mId; }
+    inline const String8& getName() { return mName; }
+    inline uint32_t getSources() { return mSources; }
+
+    inline bool isIgnored() { return mMappers.isEmpty(); }
+
+    void addMapper(InputMapper* mapper);
+    void configure();
+    void reset();
+    void process(const RawEvent* rawEvent);
+
+    void getDeviceInfo(InputDeviceInfo* outDeviceInfo);
+    int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode);
+    bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+
+    int32_t getMetaState();
+
+private:
+    InputReaderContext* mContext;
+    int32_t mId;
+
+    Vector<InputMapper*> mMappers;
+
+    String8 mName;
+    uint32_t mSources;
+
+    typedef int32_t (InputMapper::*GetStateFunc)(uint32_t sourceMask, int32_t code);
+    int32_t getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc);
+};
+
+
+/* An input mapper transforms raw input events into cooked event data.
+ * A single input device can have multiple associated input mappers in order to interpret
+ * different classes of events.
+ */
+class InputMapper {
+public:
+    InputMapper(InputDevice* device);
+    virtual ~InputMapper();
+
+    inline InputDevice* getDevice() { return mDevice; }
+    inline int32_t getDeviceId() { return mDevice->getId(); }
+    inline const String8 getDeviceName() { return mDevice->getName(); }
+    inline InputReaderContext* getContext() { return mContext; }
+    inline InputReaderPolicyInterface* getPolicy() { return mContext->getPolicy(); }
+    inline InputDispatcherInterface* getDispatcher() { return mContext->getDispatcher(); }
+    inline EventHubInterface* getEventHub() { return mContext->getEventHub(); }
+
+    virtual uint32_t getSources() = 0;
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void configure();
+    virtual void reset();
+    virtual void process(const RawEvent* rawEvent) = 0;
+
+    virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode);
+    virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+
+    virtual int32_t getMetaState();
+
+protected:
+    InputDevice* mDevice;
+    InputReaderContext* mContext;
+
+    bool applyStandardPolicyActions(nsecs_t when, int32_t policyActions);
+};
+
+
+class SwitchInputMapper : public InputMapper {
+public:
+    SwitchInputMapper(InputDevice* device);
+    virtual ~SwitchInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void process(const RawEvent* rawEvent);
+
+    virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode);
+
+private:
+    void processSwitch(nsecs_t when, int32_t switchCode, int32_t switchValue);
+};
+
+
+class KeyboardInputMapper : public InputMapper {
+public:
+    KeyboardInputMapper(InputDevice* device, int32_t associatedDisplayId, uint32_t sources,
+            int32_t keyboardType);
+    virtual ~KeyboardInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void reset();
+    virtual void process(const RawEvent* rawEvent);
+
+    virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+
+    virtual int32_t getMetaState();
+
+private:
+    struct KeyDown {
+        int32_t keyCode;
+        int32_t scanCode;
+    };
+
+    int32_t mAssociatedDisplayId;
+    uint32_t mSources;
+    int32_t mKeyboardType;
+
+    Vector<KeyDown> mKeyDowns; // keys that are down
+    int32_t mMetaState;
+    nsecs_t mDownTime; // time of most recent key down
+
+    void initialize();
+
+    bool isKeyboardOrGamepadKey(int32_t scanCode);
+    void processKey(nsecs_t when, bool down, int32_t keyCode, int32_t scanCode,
+            uint32_t policyFlags);
+
+    ssize_t findKeyDown(int32_t scanCode);
+};
+
+
+class TrackballInputMapper : public InputMapper {
+public:
+    TrackballInputMapper(InputDevice* device, int32_t associatedDisplayId);
+    virtual ~TrackballInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void reset();
+    virtual void process(const RawEvent* rawEvent);
+
+private:
+    // Amount that trackball needs to move in order to generate a key event.
+    static const int32_t TRACKBALL_MOVEMENT_THRESHOLD = 6;
+
+    int32_t mAssociatedDisplayId;
+
+    struct Accumulator {
+        enum {
+            FIELD_BTN_MOUSE = 1,
+            FIELD_REL_X = 2,
+            FIELD_REL_Y = 4
+        };
+
+        uint32_t fields;
+
+        bool btnMouse;
+        int32_t relX;
+        int32_t relY;
+
+        inline void clear() {
+            fields = 0;
+        }
+
+        inline bool isDirty() {
+            return fields != 0;
+        }
+    } mAccumulator;
+
+    bool mDown;
+    nsecs_t mDownTime;
+
+    float mXScale;
+    float mYScale;
+    float mXPrecision;
+    float mYPrecision;
+
+    void initialize();
+
+    void sync(nsecs_t when);
+};
+
+
+class TouchInputMapper : public InputMapper {
+public:
+    TouchInputMapper(InputDevice* device, int32_t associatedDisplayId);
+    virtual ~TouchInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void configure();
+    virtual void reset();
+
+    virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+
+protected:
+    /* Maximum pointer id value supported.
+     * (This is limited by our use of BitSet32 to track pointer assignments.) */
+    static const uint32_t MAX_POINTER_ID = 31;
+
+    struct VirtualKey {
+        int32_t keyCode;
+        int32_t scanCode;
+        uint32_t flags;
+
+        // computed hit box, specified in touch screen coords based on known display size
+        int32_t hitLeft;
+        int32_t hitTop;
+        int32_t hitRight;
+        int32_t hitBottom;
+
+        inline bool isHit(int32_t x, int32_t y) const {
+            return x >= hitLeft && x <= hitRight && y >= hitTop && y <= hitBottom;
+        }
+    };
+
+    struct PointerData {
+        uint32_t id;
+        int32_t x;
+        int32_t y;
+        int32_t pressure;
+        int32_t size;
+        int32_t touchMajor;
+        int32_t touchMinor;
+        int32_t toolMajor;
+        int32_t toolMinor;
+        int32_t orientation;
+    };
+
+    struct TouchData {
+        uint32_t pointerCount;
+        PointerData pointers[MAX_POINTERS];
+        BitSet32 idBits;
+        uint32_t idToIndex[MAX_POINTER_ID + 1];
+
+        void copyFrom(const TouchData& other) {
+            pointerCount = other.pointerCount;
+            idBits = other.idBits;
+
+            for (uint32_t i = 0; i < pointerCount; i++) {
+                pointers[i] = other.pointers[i];
+                idToIndex[i] = other.idToIndex[i];
+            }
+        }
+
+        inline void clear() {
+            pointerCount = 0;
+            idBits.clear();
+        }
+    };
+
+    int32_t mAssociatedDisplayId;
+    Vector<VirtualKey> mVirtualKeys;
+
+    // Immutable configuration parameters.
+    struct Parameters {
+        bool useBadTouchFilter;
+        bool useJumpyTouchFilter;
+        bool useAveragingTouchFilter;
+    } mParameters;
+
+    // Raw axis information.
+    struct Axes {
+        RawAbsoluteAxisInfo x;
+        RawAbsoluteAxisInfo y;
+        RawAbsoluteAxisInfo pressure;
+        RawAbsoluteAxisInfo size;
+        RawAbsoluteAxisInfo touchMajor;
+        RawAbsoluteAxisInfo touchMinor;
+        RawAbsoluteAxisInfo toolMajor;
+        RawAbsoluteAxisInfo toolMinor;
+        RawAbsoluteAxisInfo orientation;
+    } mAxes;
+
+    // The surface orientation and width and height set by configureSurface().
+    int32_t mSurfaceOrientation;
+    int32_t mSurfaceWidth, mSurfaceHeight;
+
+    // Translation and scaling factors, orientation-independent.
+    int32_t mXOrigin;
+    float mXScale;
+    float mXPrecision;
+
+    int32_t mYOrigin;
+    float mYScale;
+    float mYPrecision;
+
+    int32_t mPressureOrigin;
+    float mPressureScale;
+
+    int32_t mSizeOrigin;
+    float mSizeScale;
+
+    float mOrientationScale;
+
+    // Oriented motion ranges for input device info.
+    struct OrientedRanges {
+        InputDeviceInfo::MotionRange x;
+        InputDeviceInfo::MotionRange y;
+        InputDeviceInfo::MotionRange pressure;
+        InputDeviceInfo::MotionRange size;
+        InputDeviceInfo::MotionRange touchMajor;
+        InputDeviceInfo::MotionRange touchMinor;
+        InputDeviceInfo::MotionRange toolMajor;
+        InputDeviceInfo::MotionRange toolMinor;
+        InputDeviceInfo::MotionRange orientation;
+    } mOrientedRanges;
+
+    // Oriented dimensions and precision.
+    float mOrientedSurfaceWidth, mOrientedSurfaceHeight;
+    float mOrientedXPrecision, mOrientedYPrecision;
+
+    // The touch data of the current sample being processed.
+    TouchData mCurrentTouch;
+
+    // The touch data of the previous sample that was processed.  This is updated
+    // incrementally while the current sample is being processed.
+    TouchData mLastTouch;
+
+    // The time the primary pointer last went down.
+    nsecs_t mDownTime;
+
+    struct CurrentVirtualKeyState {
+        bool down;
+        nsecs_t downTime;
+        int32_t keyCode;
+        int32_t scanCode;
+    } mCurrentVirtualKey;
+
+    // Lock for virtual key state.
+    Mutex mVirtualKeyLock; // methods use "Lvk" suffix
+
+    virtual void configureAxes();
+    virtual bool configureSurface();
+    virtual void configureVirtualKeys();
+
+    enum TouchResult {
+        // Dispatch the touch normally.
+        DISPATCH_TOUCH,
+        // Do not dispatch the touch, but keep tracking the current stroke.
+        SKIP_TOUCH,
+        // Do not dispatch the touch, and drop all information associated with the current stoke
+        // so the next movement will appear as a new down.
+        DROP_STROKE
+    };
+
+    void syncTouch(nsecs_t when, bool havePointerIds);
+
+private:
+    /* Maximum number of historical samples to average. */
+    static const uint32_t AVERAGING_HISTORY_SIZE = 5;
+
+    /* Slop distance for jumpy pointer detection.
+     * The vertical range of the screen divided by this is our epsilon value. */
+    static const uint32_t JUMPY_EPSILON_DIVISOR = 212;
+
+    /* Number of jumpy points to drop for touchscreens that need it. */
+    static const uint32_t JUMPY_TRANSITION_DROPS = 3;
+    static const uint32_t JUMPY_DROP_LIMIT = 3;
+
+    /* Maximum squared distance for averaging.
+     * If moving farther than this, turn of averaging to avoid lag in response. */
+    static const uint64_t AVERAGING_DISTANCE_LIMIT = 75 * 75;
+
+    struct AveragingTouchFilterState {
+        // Individual history tracks are stored by pointer id
+        uint32_t historyStart[MAX_POINTERS];
+        uint32_t historyEnd[MAX_POINTERS];
+        struct {
+            struct {
+                int32_t x;
+                int32_t y;
+                int32_t pressure;
+            } pointers[MAX_POINTERS];
+        } historyData[AVERAGING_HISTORY_SIZE];
+    } mAveragingTouchFilter;
+
+    struct JumpTouchFilterState {
+        uint32_t jumpyPointsDropped;
+    } mJumpyTouchFilter;
+
+    struct PointerDistanceHeapElement {
+        uint32_t currentPointerIndex : 8;
+        uint32_t lastPointerIndex : 8;
+        uint64_t distance : 48; // squared distance
+    };
+
+    void initialize();
+
+    TouchResult consumeOffScreenTouches(nsecs_t when, uint32_t policyFlags);
+    void dispatchTouches(nsecs_t when, uint32_t policyFlags);
+    void dispatchTouch(nsecs_t when, uint32_t policyFlags, TouchData* touch,
+            BitSet32 idBits, uint32_t changedId, int32_t motionEventAction);
+
+    bool isPointInsideSurface(int32_t x, int32_t y);
+    const VirtualKey* findVirtualKeyHitLvk(int32_t x, int32_t y);
+
+    bool applyBadTouchFilter();
+    bool applyJumpyTouchFilter();
+    void applyAveragingTouchFilter();
+    void calculatePointerIds();
+};
+
+
+class SingleTouchInputMapper : public TouchInputMapper {
+public:
+    SingleTouchInputMapper(InputDevice* device, int32_t associatedDisplayId);
+    virtual ~SingleTouchInputMapper();
+
+    virtual void reset();
+    virtual void process(const RawEvent* rawEvent);
+
+protected:
+    virtual void configureAxes();
+
+private:
+    struct Accumulator {
+        enum {
+            FIELD_BTN_TOUCH = 1,
+            FIELD_ABS_X = 2,
+            FIELD_ABS_Y = 4,
+            FIELD_ABS_PRESSURE = 8,
+            FIELD_ABS_TOOL_WIDTH = 16
+        };
+
+        uint32_t fields;
+
+        bool btnTouch;
+        int32_t absX;
+        int32_t absY;
+        int32_t absPressure;
+        int32_t absToolWidth;
+
+        inline void clear() {
+            fields = 0;
+        }
+
+        inline bool isDirty() {
+            return fields != 0;
+        }
+    } mAccumulator;
+
+    bool mDown;
+    int32_t mX;
+    int32_t mY;
+    int32_t mPressure;
+    int32_t mSize;
+
+    void initialize();
+
+    void sync(nsecs_t when);
+};
+
+
+class MultiTouchInputMapper : public TouchInputMapper {
+public:
+    MultiTouchInputMapper(InputDevice* device, int32_t associatedDisplayId);
+    virtual ~MultiTouchInputMapper();
+
+    virtual void reset();
+    virtual void process(const RawEvent* rawEvent);
+
+protected:
+    virtual void configureAxes();
+
+private:
+    struct Accumulator {
+        enum {
+            FIELD_ABS_MT_POSITION_X = 1,
+            FIELD_ABS_MT_POSITION_Y = 2,
+            FIELD_ABS_MT_TOUCH_MAJOR = 4,
+            FIELD_ABS_MT_TOUCH_MINOR = 8,
+            FIELD_ABS_MT_WIDTH_MAJOR = 16,
+            FIELD_ABS_MT_WIDTH_MINOR = 32,
+            FIELD_ABS_MT_ORIENTATION = 64,
+            FIELD_ABS_MT_TRACKING_ID = 128
+        };
+
+        uint32_t pointerCount;
+        struct Pointer {
+            uint32_t fields;
+
+            int32_t absMTPositionX;
+            int32_t absMTPositionY;
+            int32_t absMTTouchMajor;
+            int32_t absMTTouchMinor;
+            int32_t absMTWidthMajor;
+            int32_t absMTWidthMinor;
+            int32_t absMTOrientation;
+            int32_t absMTTrackingId;
+
+            inline void clear() {
+                fields = 0;
+            }
+        } pointers[MAX_POINTERS + 1]; // + 1 to remove the need for extra range checks
+
+        inline void clear() {
+            pointerCount = 0;
+            pointers[0].clear();
+        }
+
+        inline bool isDirty() {
+            return pointerCount != 0;
+        }
+    } mAccumulator;
+
+    void initialize();
+
+    void sync(nsecs_t when);
+};
+
 } // namespace android
 
 #endif // _UI_INPUT_READER_H