458 lines
16 KiB
C
458 lines
16 KiB
C
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/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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#ifndef _RUNTIME_EVENT_HUB_H
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#define _RUNTIME_EVENT_HUB_H
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#include <input/Input.h>
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#include <input/InputDevice.h>
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#include <input/Keyboard.h>
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#include <input/KeyLayoutMap.h>
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#include <input/KeyCharacterMap.h>
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#include <input/VirtualKeyMap.h>
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#include <utils/String8.h>
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#include <utils/threads.h>
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#include <utils/Log.h>
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#include <utils/threads.h>
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#include <utils/List.h>
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#include <utils/Errors.h>
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#include <utils/PropertyMap.h>
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#include <utils/Vector.h>
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#include <utils/KeyedVector.h>
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#include <utils/BitSet.h>
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#include <linux/input.h>
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#include <sys/epoll.h>
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/* Convenience constants. */
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#define BTN_FIRST 0x100 // first button code
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#define BTN_LAST 0x15f // last button code
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/*
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* These constants are used privately in Android to pass raw timestamps
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* through evdev from uinput device drivers because there is currently no
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* other way to transfer this information. The evdev driver automatically
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* timestamps all input events with the time they were posted and clobbers
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* whatever information was passed in.
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*
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* For the purposes of this hack, the timestamp is specified in the
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* CLOCK_MONOTONIC timebase and is split into two EV_MSC events specifying
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* seconds and microseconds.
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*/
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#define MSC_ANDROID_TIME_SEC 0x6
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#define MSC_ANDROID_TIME_USEC 0x7
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namespace android {
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enum {
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// Device id of a special "virtual" keyboard that is always present.
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VIRTUAL_KEYBOARD_ID = -1,
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// Device id of the "built-in" keyboard if there is one.
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BUILT_IN_KEYBOARD_ID = 0,
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};
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/*
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* A raw event as retrieved from the EventHub.
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*/
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struct RawEvent {
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nsecs_t when;
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int32_t deviceId;
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int32_t type;
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int32_t code;
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int32_t value;
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};
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/* Describes an absolute axis. */
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struct RawAbsoluteAxisInfo {
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bool valid; // true if the information is valid, false otherwise
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int32_t minValue; // minimum value
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int32_t maxValue; // maximum value
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int32_t flat; // center flat position, eg. flat == 8 means center is between -8 and 8
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int32_t fuzz; // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise
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int32_t resolution; // resolution in units per mm or radians per mm
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inline void clear() {
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valid = false;
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minValue = 0;
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maxValue = 0;
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flat = 0;
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fuzz = 0;
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resolution = 0;
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}
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};
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/*
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* Input device classes.
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*/
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enum {
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/* The input device is a keyboard or has buttons. */
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INPUT_DEVICE_CLASS_KEYBOARD = 0x00000001,
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/* The input device is an alpha-numeric keyboard (not just a dial pad). */
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INPUT_DEVICE_CLASS_ALPHAKEY = 0x00000002,
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/* The input device is a touchscreen or a touchpad (either single-touch or multi-touch). */
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INPUT_DEVICE_CLASS_TOUCH = 0x00000004,
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/* The input device is a cursor device such as a trackball or mouse. */
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INPUT_DEVICE_CLASS_CURSOR = 0x00000008,
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/* The input device is a multi-touch touchscreen. */
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INPUT_DEVICE_CLASS_TOUCH_MT = 0x00000010,
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/* The input device is a directional pad (implies keyboard, has DPAD keys). */
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INPUT_DEVICE_CLASS_DPAD = 0x00000020,
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/* The input device is a gamepad (implies keyboard, has BUTTON keys). */
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INPUT_DEVICE_CLASS_GAMEPAD = 0x00000040,
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/* The input device has switches. */
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INPUT_DEVICE_CLASS_SWITCH = 0x00000080,
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/* The input device is a joystick (implies gamepad, has joystick absolute axes). */
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INPUT_DEVICE_CLASS_JOYSTICK = 0x00000100,
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/* The input device has a vibrator (supports FF_RUMBLE). */
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INPUT_DEVICE_CLASS_VIBRATOR = 0x00000200,
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/* The input device is virtual (not a real device, not part of UI configuration). */
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INPUT_DEVICE_CLASS_VIRTUAL = 0x40000000,
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/* The input device is external (not built-in). */
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INPUT_DEVICE_CLASS_EXTERNAL = 0x80000000,
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};
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/*
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* Gets the class that owns an axis, in cases where multiple classes might claim
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* the same axis for different purposes.
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*/
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extern uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses);
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/*
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* Grand Central Station for events.
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*
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* The event hub aggregates input events received across all known input
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* devices on the system, including devices that may be emulated by the simulator
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* environment. In addition, the event hub generates fake input events to indicate
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* when devices are added or removed.
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*
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* The event hub provides a stream of input events (via the getEvent function).
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* It also supports querying the current actual state of input devices such as identifying
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* which keys are currently down. Finally, the event hub keeps track of the capabilities of
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* individual input devices, such as their class and the set of key codes that they support.
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*/
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class EventHubInterface : public virtual RefBase {
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protected:
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EventHubInterface() { }
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virtual ~EventHubInterface() { }
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public:
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// Synthetic raw event type codes produced when devices are added or removed.
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enum {
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// Sent when a device is added.
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DEVICE_ADDED = 0x10000000,
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// Sent when a device is removed.
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DEVICE_REMOVED = 0x20000000,
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// Sent when all added/removed devices from the most recent scan have been reported.
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// This event is always sent at least once.
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FINISHED_DEVICE_SCAN = 0x30000000,
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FIRST_SYNTHETIC_EVENT = DEVICE_ADDED,
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};
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virtual uint32_t getDeviceClasses(int32_t deviceId) const = 0;
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virtual InputDeviceIdentifier getDeviceIdentifier(int32_t deviceId) const = 0;
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virtual int32_t getDeviceControllerNumber(int32_t deviceId) const = 0;
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virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const = 0;
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virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
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RawAbsoluteAxisInfo* outAxisInfo) const = 0;
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virtual bool hasRelativeAxis(int32_t deviceId, int axis) const = 0;
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virtual bool hasInputProperty(int32_t deviceId, int property) const = 0;
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virtual status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
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int32_t* outKeycode, uint32_t* outFlags) const = 0;
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virtual status_t mapAxis(int32_t deviceId, int32_t scanCode,
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AxisInfo* outAxisInfo) const = 0;
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// Sets devices that are excluded from opening.
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// This can be used to ignore input devices for sensors.
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virtual void setExcludedDevices(const Vector<String8>& devices) = 0;
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/*
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* Wait for events to become available and returns them.
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* After returning, the EventHub holds onto a wake lock until the next call to getEvent.
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* This ensures that the device will not go to sleep while the event is being processed.
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* If the device needs to remain awake longer than that, then the caller is responsible
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* for taking care of it (say, by poking the power manager user activity timer).
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*
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* The timeout is advisory only. If the device is asleep, it will not wake just to
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* service the timeout.
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*
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* Returns the number of events obtained, or 0 if the timeout expired.
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*/
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virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) = 0;
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/*
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* Query current input state.
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*/
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virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const = 0;
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virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const = 0;
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virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const = 0;
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virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis,
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int32_t* outValue) const = 0;
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/*
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* Examine key input devices for specific framework keycode support
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*/
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virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
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uint8_t* outFlags) const = 0;
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virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const = 0;
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/* LED related functions expect Android LED constants, not scan codes or HID usages */
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virtual bool hasLed(int32_t deviceId, int32_t led) const = 0;
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virtual void setLedState(int32_t deviceId, int32_t led, bool on) = 0;
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virtual void getVirtualKeyDefinitions(int32_t deviceId,
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Vector<VirtualKeyDefinition>& outVirtualKeys) const = 0;
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virtual sp<KeyCharacterMap> getKeyCharacterMap(int32_t deviceId) const = 0;
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virtual bool setKeyboardLayoutOverlay(int32_t deviceId, const sp<KeyCharacterMap>& map) = 0;
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/* Control the vibrator. */
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virtual void vibrate(int32_t deviceId, nsecs_t duration) = 0;
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virtual void cancelVibrate(int32_t deviceId) = 0;
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/* Requests the EventHub to reopen all input devices on the next call to getEvents(). */
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virtual void requestReopenDevices() = 0;
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/* Wakes up getEvents() if it is blocked on a read. */
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virtual void wake() = 0;
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/* Dump EventHub state to a string. */
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virtual void dump(String8& dump) = 0;
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/* Called by the heatbeat to ensures that the reader has not deadlocked. */
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virtual void monitor() = 0;
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};
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class EventHub : public EventHubInterface
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{
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public:
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EventHub();
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virtual uint32_t getDeviceClasses(int32_t deviceId) const;
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virtual InputDeviceIdentifier getDeviceIdentifier(int32_t deviceId) const;
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virtual int32_t getDeviceControllerNumber(int32_t deviceId) const;
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virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const;
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virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
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RawAbsoluteAxisInfo* outAxisInfo) const;
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virtual bool hasRelativeAxis(int32_t deviceId, int axis) const;
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virtual bool hasInputProperty(int32_t deviceId, int property) const;
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virtual status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
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int32_t* outKeycode, uint32_t* outFlags) const;
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virtual status_t mapAxis(int32_t deviceId, int32_t scanCode,
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AxisInfo* outAxisInfo) const;
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virtual void setExcludedDevices(const Vector<String8>& devices);
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virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const;
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virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const;
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virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const;
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virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const;
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virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
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const int32_t* keyCodes, uint8_t* outFlags) const;
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virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize);
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virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const;
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virtual bool hasLed(int32_t deviceId, int32_t led) const;
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virtual void setLedState(int32_t deviceId, int32_t led, bool on);
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virtual void getVirtualKeyDefinitions(int32_t deviceId,
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Vector<VirtualKeyDefinition>& outVirtualKeys) const;
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virtual sp<KeyCharacterMap> getKeyCharacterMap(int32_t deviceId) const;
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virtual bool setKeyboardLayoutOverlay(int32_t deviceId, const sp<KeyCharacterMap>& map);
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virtual void vibrate(int32_t deviceId, nsecs_t duration);
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virtual void cancelVibrate(int32_t deviceId);
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virtual void requestReopenDevices();
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virtual void wake();
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virtual void dump(String8& dump);
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virtual void monitor();
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protected:
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virtual ~EventHub();
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private:
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struct Device {
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Device* next;
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int fd; // may be -1 if device is virtual
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const int32_t id;
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const String8 path;
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const InputDeviceIdentifier identifier;
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uint32_t classes;
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uint8_t keyBitmask[(KEY_MAX + 1) / 8];
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uint8_t absBitmask[(ABS_MAX + 1) / 8];
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uint8_t relBitmask[(REL_MAX + 1) / 8];
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uint8_t swBitmask[(SW_MAX + 1) / 8];
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uint8_t ledBitmask[(LED_MAX + 1) / 8];
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uint8_t ffBitmask[(FF_MAX + 1) / 8];
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uint8_t propBitmask[(INPUT_PROP_MAX + 1) / 8];
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String8 configurationFile;
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PropertyMap* configuration;
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VirtualKeyMap* virtualKeyMap;
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KeyMap keyMap;
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sp<KeyCharacterMap> overlayKeyMap;
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sp<KeyCharacterMap> combinedKeyMap;
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bool ffEffectPlaying;
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int16_t ffEffectId; // initially -1
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int32_t controllerNumber;
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int32_t timestampOverrideSec;
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int32_t timestampOverrideUsec;
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Device(int fd, int32_t id, const String8& path, const InputDeviceIdentifier& identifier);
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~Device();
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||
|
|
|
||
|
|
void close();
|
||
|
|
|
||
|
|
inline bool isVirtual() const { return fd < 0; }
|
||
|
|
|
||
|
|
const sp<KeyCharacterMap>& getKeyCharacterMap() const {
|
||
|
|
if (combinedKeyMap != NULL) {
|
||
|
|
return combinedKeyMap;
|
||
|
|
}
|
||
|
|
return keyMap.keyCharacterMap;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
status_t openDeviceLocked(const char *devicePath);
|
||
|
|
void createVirtualKeyboardLocked();
|
||
|
|
void addDeviceLocked(Device* device);
|
||
|
|
void assignDescriptorLocked(InputDeviceIdentifier& identifier);
|
||
|
|
|
||
|
|
status_t closeDeviceByPathLocked(const char *devicePath);
|
||
|
|
void closeDeviceLocked(Device* device);
|
||
|
|
void closeAllDevicesLocked();
|
||
|
|
|
||
|
|
status_t scanDirLocked(const char *dirname);
|
||
|
|
void scanDevicesLocked();
|
||
|
|
status_t readNotifyLocked();
|
||
|
|
|
||
|
|
Device* getDeviceByDescriptorLocked(String8& descriptor) const;
|
||
|
|
Device* getDeviceLocked(int32_t deviceId) const;
|
||
|
|
Device* getDeviceByPathLocked(const char* devicePath) const;
|
||
|
|
|
||
|
|
bool hasKeycodeLocked(Device* device, int keycode) const;
|
||
|
|
|
||
|
|
void loadConfigurationLocked(Device* device);
|
||
|
|
status_t loadVirtualKeyMapLocked(Device* device);
|
||
|
|
status_t loadKeyMapLocked(Device* device);
|
||
|
|
|
||
|
|
bool isExternalDeviceLocked(Device* device);
|
||
|
|
|
||
|
|
int32_t getNextControllerNumberLocked(Device* device);
|
||
|
|
void releaseControllerNumberLocked(Device* device);
|
||
|
|
void setLedForController(Device* device);
|
||
|
|
|
||
|
|
status_t mapLed(Device* device, int32_t led, int32_t* outScanCode) const;
|
||
|
|
void setLedStateLocked(Device* device, int32_t led, bool on);
|
||
|
|
|
||
|
|
// Protect all internal state.
|
||
|
|
mutable Mutex mLock;
|
||
|
|
|
||
|
|
// The actual id of the built-in keyboard, or NO_BUILT_IN_KEYBOARD if none.
|
||
|
|
// EventHub remaps the built-in keyboard to id 0 externally as required by the API.
|
||
|
|
enum {
|
||
|
|
// Must not conflict with any other assigned device ids, including
|
||
|
|
// the virtual keyboard id (-1).
|
||
|
|
NO_BUILT_IN_KEYBOARD = -2,
|
||
|
|
};
|
||
|
|
int32_t mBuiltInKeyboardId;
|
||
|
|
|
||
|
|
int32_t mNextDeviceId;
|
||
|
|
|
||
|
|
BitSet32 mControllerNumbers;
|
||
|
|
|
||
|
|
KeyedVector<int32_t, Device*> mDevices;
|
||
|
|
|
||
|
|
Device *mOpeningDevices;
|
||
|
|
Device *mClosingDevices;
|
||
|
|
|
||
|
|
bool mNeedToSendFinishedDeviceScan;
|
||
|
|
bool mNeedToReopenDevices;
|
||
|
|
bool mNeedToScanDevices;
|
||
|
|
Vector<String8> mExcludedDevices;
|
||
|
|
|
||
|
|
int mEpollFd;
|
||
|
|
int mINotifyFd;
|
||
|
|
int mWakeReadPipeFd;
|
||
|
|
int mWakeWritePipeFd;
|
||
|
|
|
||
|
|
// Ids used for epoll notifications not associated with devices.
|
||
|
|
static const uint32_t EPOLL_ID_INOTIFY = 0x80000001;
|
||
|
|
static const uint32_t EPOLL_ID_WAKE = 0x80000002;
|
||
|
|
|
||
|
|
// Epoll FD list size hint.
|
||
|
|
static const int EPOLL_SIZE_HINT = 8;
|
||
|
|
|
||
|
|
// Maximum number of signalled FDs to handle at a time.
|
||
|
|
static const int EPOLL_MAX_EVENTS = 16;
|
||
|
|
|
||
|
|
// The array of pending epoll events and the index of the next event to be handled.
|
||
|
|
struct epoll_event mPendingEventItems[EPOLL_MAX_EVENTS];
|
||
|
|
size_t mPendingEventCount;
|
||
|
|
size_t mPendingEventIndex;
|
||
|
|
bool mPendingINotify;
|
||
|
|
|
||
|
|
bool mUsingEpollWakeup;
|
||
|
|
};
|
||
|
|
|
||
|
|
}; // namespace android
|
||
|
|
|
||
|
|
#endif // _RUNTIME_EVENT_HUB_H
|