Create inputreader directory
In order to start the work to split InputReader.cpp into multiple files,
we first create a reader directory to hold the source files for
libinputreader.
The affected files are also reformatted with clang-format.
Bug: 140139676
Test: libinputflinger and libinputflinger_tests builds successfully for
crosshatch
Change-Id: I62b6b873e2a03e61655eb6214183c984306dcfdb
diff --git a/services/inputflinger/reader/include/EventHub.h b/services/inputflinger/reader/include/EventHub.h
new file mode 100644
index 0000000..da0f497
--- /dev/null
+++ b/services/inputflinger/reader/include/EventHub.h
@@ -0,0 +1,481 @@
+/*
+ * Copyright (C) 2005 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 _RUNTIME_EVENT_HUB_H
+#define _RUNTIME_EVENT_HUB_H
+
+#include <vector>
+
+#include <input/Input.h>
+#include <input/InputDevice.h>
+#include <input/KeyCharacterMap.h>
+#include <input/KeyLayoutMap.h>
+#include <input/Keyboard.h>
+#include <input/VirtualKeyMap.h>
+#include <utils/BitSet.h>
+#include <utils/Errors.h>
+#include <utils/KeyedVector.h>
+#include <utils/List.h>
+#include <utils/Log.h>
+#include <utils/Mutex.h>
+#include <utils/PropertyMap.h>
+
+#include <linux/input.h>
+#include <sys/epoll.h>
+
+#include "TouchVideoDevice.h"
+
+/* Convenience constants. */
+
+#define BTN_FIRST 0x100 // first button code
+#define BTN_LAST 0x15f // last button code
+
+namespace android {
+
+/*
+ * A raw event as retrieved from the EventHub.
+ */
+struct RawEvent {
+ nsecs_t when;
+ int32_t deviceId;
+ int32_t type;
+ int32_t code;
+ int32_t value;
+};
+
+/* 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
+ int32_t resolution; // resolution in units per mm or radians per mm
+
+ inline void clear() {
+ valid = false;
+ minValue = 0;
+ maxValue = 0;
+ flat = 0;
+ fuzz = 0;
+ resolution = 0;
+ }
+};
+
+/*
+ * Input device classes.
+ */
+enum {
+ /* The input device is a keyboard or has buttons. */
+ INPUT_DEVICE_CLASS_KEYBOARD = 0x00000001,
+
+ /* The input device is an alpha-numeric keyboard (not just a dial pad). */
+ INPUT_DEVICE_CLASS_ALPHAKEY = 0x00000002,
+
+ /* The input device is a touchscreen or a touchpad (either single-touch or multi-touch). */
+ INPUT_DEVICE_CLASS_TOUCH = 0x00000004,
+
+ /* The input device is a cursor device such as a trackball or mouse. */
+ INPUT_DEVICE_CLASS_CURSOR = 0x00000008,
+
+ /* The input device is a multi-touch touchscreen. */
+ INPUT_DEVICE_CLASS_TOUCH_MT = 0x00000010,
+
+ /* The input device is a directional pad (implies keyboard, has DPAD keys). */
+ INPUT_DEVICE_CLASS_DPAD = 0x00000020,
+
+ /* The input device is a gamepad (implies keyboard, has BUTTON keys). */
+ INPUT_DEVICE_CLASS_GAMEPAD = 0x00000040,
+
+ /* The input device has switches. */
+ INPUT_DEVICE_CLASS_SWITCH = 0x00000080,
+
+ /* The input device is a joystick (implies gamepad, has joystick absolute axes). */
+ INPUT_DEVICE_CLASS_JOYSTICK = 0x00000100,
+
+ /* The input device has a vibrator (supports FF_RUMBLE). */
+ INPUT_DEVICE_CLASS_VIBRATOR = 0x00000200,
+
+ /* The input device has a microphone. */
+ INPUT_DEVICE_CLASS_MIC = 0x00000400,
+
+ /* The input device is an external stylus (has data we want to fuse with touch data). */
+ INPUT_DEVICE_CLASS_EXTERNAL_STYLUS = 0x00000800,
+
+ /* The input device has a rotary encoder */
+ INPUT_DEVICE_CLASS_ROTARY_ENCODER = 0x00001000,
+
+ /* The input device is virtual (not a real device, not part of UI configuration). */
+ INPUT_DEVICE_CLASS_VIRTUAL = 0x40000000,
+
+ /* The input device is external (not built-in). */
+ INPUT_DEVICE_CLASS_EXTERNAL = 0x80000000,
+};
+
+/*
+ * Gets the class that owns an axis, in cases where multiple classes might claim
+ * the same axis for different purposes.
+ */
+extern uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses);
+
+/*
+ * Grand Central Station for events.
+ *
+ * The event hub aggregates input events received across all known input
+ * devices on the system, including devices that may be emulated by the simulator
+ * environment. In addition, the event hub generates fake input events to indicate
+ * when devices are added or removed.
+ *
+ * The event hub provides a stream of input events (via the getEvent function).
+ * It also supports querying the current actual state of input devices such as identifying
+ * which keys are currently down. Finally, the event hub keeps track of the capabilities of
+ * individual input devices, such as their class and the set of key codes that they support.
+ */
+class EventHubInterface {
+public:
+ EventHubInterface() {}
+ virtual ~EventHubInterface() {}
+
+ // Synthetic raw event type codes produced when devices are added or removed.
+ enum {
+ // Sent when a device is added.
+ DEVICE_ADDED = 0x10000000,
+ // Sent when a device is removed.
+ DEVICE_REMOVED = 0x20000000,
+ // Sent when all added/removed devices from the most recent scan have been reported.
+ // This event is always sent at least once.
+ FINISHED_DEVICE_SCAN = 0x30000000,
+
+ FIRST_SYNTHETIC_EVENT = DEVICE_ADDED,
+ };
+
+ virtual uint32_t getDeviceClasses(int32_t deviceId) const = 0;
+
+ virtual InputDeviceIdentifier getDeviceIdentifier(int32_t deviceId) const = 0;
+
+ virtual int32_t getDeviceControllerNumber(int32_t deviceId) const = 0;
+
+ virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const = 0;
+
+ virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+ RawAbsoluteAxisInfo* outAxisInfo) const = 0;
+
+ virtual bool hasRelativeAxis(int32_t deviceId, int axis) const = 0;
+
+ virtual bool hasInputProperty(int32_t deviceId, int property) const = 0;
+
+ virtual status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
+ int32_t metaState, int32_t* outKeycode, int32_t* outMetaState,
+ uint32_t* outFlags) const = 0;
+
+ virtual status_t mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const = 0;
+
+ // Sets devices that are excluded from opening.
+ // This can be used to ignore input devices for sensors.
+ virtual void setExcludedDevices(const std::vector<std::string>& devices) = 0;
+
+ /*
+ * Wait for events to become available and returns them.
+ * After returning, the EventHub holds onto a wake lock until the next call to getEvent.
+ * This ensures that the device will not go to sleep while the event is being processed.
+ * 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).
+ *
+ * The timeout is advisory only. If the device is asleep, it will not wake just to
+ * service the timeout.
+ *
+ * Returns the number of events obtained, or 0 if the timeout expired.
+ */
+ virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) = 0;
+ virtual std::vector<TouchVideoFrame> getVideoFrames(int32_t deviceId) = 0;
+
+ /*
+ * Query current input state.
+ */
+ 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;
+ virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis,
+ int32_t* outValue) const = 0;
+
+ /*
+ * Examine key input devices for specific framework keycode support
+ */
+ virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
+ uint8_t* outFlags) const = 0;
+
+ virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const = 0;
+
+ /* LED related functions expect Android LED constants, not scan codes or HID usages */
+ virtual bool hasLed(int32_t deviceId, int32_t led) const = 0;
+ virtual void setLedState(int32_t deviceId, int32_t led, bool on) = 0;
+
+ virtual void getVirtualKeyDefinitions(
+ int32_t deviceId, std::vector<VirtualKeyDefinition>& outVirtualKeys) const = 0;
+
+ virtual sp<KeyCharacterMap> getKeyCharacterMap(int32_t deviceId) const = 0;
+ virtual bool setKeyboardLayoutOverlay(int32_t deviceId, const sp<KeyCharacterMap>& map) = 0;
+
+ /* Control the vibrator. */
+ virtual void vibrate(int32_t deviceId, nsecs_t duration) = 0;
+ virtual void cancelVibrate(int32_t deviceId) = 0;
+
+ /* Requests the EventHub to reopen all input devices on the next call to getEvents(). */
+ virtual void requestReopenDevices() = 0;
+
+ /* Wakes up getEvents() if it is blocked on a read. */
+ virtual void wake() = 0;
+
+ /* Dump EventHub state to a string. */
+ virtual void dump(std::string& dump) = 0;
+
+ /* Called by the heatbeat to ensures that the reader has not deadlocked. */
+ virtual void monitor() = 0;
+
+ /* Return true if the device is enabled. */
+ virtual bool isDeviceEnabled(int32_t deviceId) = 0;
+
+ /* Enable an input device */
+ virtual status_t enableDevice(int32_t deviceId) = 0;
+
+ /* Disable an input device. Closes file descriptor to that device. */
+ virtual status_t disableDevice(int32_t deviceId) = 0;
+};
+
+class EventHub : public EventHubInterface {
+public:
+ EventHub();
+
+ virtual uint32_t getDeviceClasses(int32_t deviceId) const;
+
+ virtual InputDeviceIdentifier getDeviceIdentifier(int32_t deviceId) const;
+
+ virtual int32_t getDeviceControllerNumber(int32_t deviceId) const;
+
+ virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const;
+
+ virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+ RawAbsoluteAxisInfo* outAxisInfo) const;
+
+ virtual bool hasRelativeAxis(int32_t deviceId, int axis) const;
+
+ virtual bool hasInputProperty(int32_t deviceId, int property) const;
+
+ virtual status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
+ int32_t metaState, int32_t* outKeycode, int32_t* outMetaState,
+ uint32_t* outFlags) const;
+
+ virtual status_t mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const;
+
+ virtual void setExcludedDevices(const std::vector<std::string>& devices);
+
+ 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 status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const;
+
+ virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
+ uint8_t* outFlags) const;
+
+ virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize);
+ virtual std::vector<TouchVideoFrame> getVideoFrames(int32_t deviceId);
+
+ virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const;
+ virtual bool hasLed(int32_t deviceId, int32_t led) const;
+ virtual void setLedState(int32_t deviceId, int32_t led, bool on);
+
+ virtual void getVirtualKeyDefinitions(int32_t deviceId,
+ std::vector<VirtualKeyDefinition>& outVirtualKeys) const;
+
+ virtual sp<KeyCharacterMap> getKeyCharacterMap(int32_t deviceId) const;
+ virtual bool setKeyboardLayoutOverlay(int32_t deviceId, const sp<KeyCharacterMap>& map);
+
+ virtual void vibrate(int32_t deviceId, nsecs_t duration);
+ virtual void cancelVibrate(int32_t deviceId);
+
+ virtual void requestReopenDevices();
+
+ virtual void wake();
+
+ virtual void dump(std::string& dump);
+ virtual void monitor();
+
+ virtual ~EventHub();
+
+private:
+ struct Device {
+ Device* next;
+
+ int fd; // may be -1 if device is closed
+ const int32_t id;
+ const std::string path;
+ const InputDeviceIdentifier identifier;
+
+ std::unique_ptr<TouchVideoDevice> videoDevice;
+
+ uint32_t classes;
+
+ uint8_t keyBitmask[(KEY_MAX + 1) / 8];
+ uint8_t absBitmask[(ABS_MAX + 1) / 8];
+ uint8_t relBitmask[(REL_MAX + 1) / 8];
+ uint8_t swBitmask[(SW_MAX + 1) / 8];
+ uint8_t ledBitmask[(LED_MAX + 1) / 8];
+ uint8_t ffBitmask[(FF_MAX + 1) / 8];
+ uint8_t propBitmask[(INPUT_PROP_MAX + 1) / 8];
+
+ std::string configurationFile;
+ PropertyMap* configuration;
+ std::unique_ptr<VirtualKeyMap> virtualKeyMap;
+ KeyMap keyMap;
+
+ sp<KeyCharacterMap> overlayKeyMap;
+ sp<KeyCharacterMap> combinedKeyMap;
+
+ bool ffEffectPlaying;
+ int16_t ffEffectId; // initially -1
+
+ int32_t controllerNumber;
+
+ Device(int fd, int32_t id, const std::string& path,
+ const InputDeviceIdentifier& identifier);
+ ~Device();
+
+ void close();
+
+ bool enabled; // initially true
+ status_t enable();
+ status_t disable();
+ bool hasValidFd();
+ const bool isVirtual; // set if fd < 0 is passed to constructor
+
+ const sp<KeyCharacterMap>& getKeyCharacterMap() const {
+ if (combinedKeyMap != nullptr) {
+ return combinedKeyMap;
+ }
+ return keyMap.keyCharacterMap;
+ }
+ };
+
+ status_t openDeviceLocked(const char* devicePath);
+ void openVideoDeviceLocked(const std::string& devicePath);
+ void createVirtualKeyboardLocked();
+ void addDeviceLocked(Device* device);
+ void assignDescriptorLocked(InputDeviceIdentifier& identifier);
+
+ void closeDeviceByPathLocked(const char* devicePath);
+ void closeVideoDeviceByPathLocked(const std::string& devicePath);
+ void closeDeviceLocked(Device* device);
+ void closeAllDevicesLocked();
+
+ void configureFd(Device* device);
+
+ bool isDeviceEnabled(int32_t deviceId);
+ status_t enableDevice(int32_t deviceId);
+ status_t disableDevice(int32_t deviceId);
+ status_t registerFdForEpoll(int fd);
+ status_t unregisterFdFromEpoll(int fd);
+ status_t registerDeviceForEpollLocked(Device* device);
+ void registerVideoDeviceForEpollLocked(const TouchVideoDevice& videoDevice);
+ status_t unregisterDeviceFromEpollLocked(Device* device);
+ void unregisterVideoDeviceFromEpollLocked(const TouchVideoDevice& videoDevice);
+
+ status_t scanDirLocked(const char* dirname);
+ status_t scanVideoDirLocked(const std::string& dirname);
+ void scanDevicesLocked();
+ status_t readNotifyLocked();
+
+ Device* getDeviceByDescriptorLocked(const std::string& descriptor) const;
+ Device* getDeviceLocked(int32_t deviceId) const;
+ Device* getDeviceByPathLocked(const char* devicePath) const;
+ /**
+ * Look through all available fd's (both for input devices and for video devices),
+ * and return the device pointer.
+ */
+ Device* getDeviceByFdLocked(int fd) const;
+
+ bool hasKeycodeLocked(Device* device, int keycode) const;
+
+ void loadConfigurationLocked(Device* device);
+ bool loadVirtualKeyMapLocked(Device* device);
+ status_t loadKeyMapLocked(Device* device);
+
+ bool isExternalDeviceLocked(Device* device);
+ bool deviceHasMicLocked(Device* device);
+
+ int32_t getNextControllerNumberLocked(Device* device);
+ void releaseControllerNumberLocked(Device* device);
+ void setLedForControllerLocked(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;
+ /**
+ * Video devices that report touchscreen heatmap, but have not (yet) been paired
+ * with a specific input device. Video device discovery is independent from input device
+ * discovery, so the two types of devices could be found in any order.
+ * Ideally, video devices in this queue do not have an open fd, or at least aren't
+ * actively streaming.
+ */
+ std::vector<std::unique_ptr<TouchVideoDevice>> mUnattachedVideoDevices;
+
+ Device* mOpeningDevices;
+ Device* mClosingDevices;
+
+ bool mNeedToSendFinishedDeviceScan;
+ bool mNeedToReopenDevices;
+ bool mNeedToScanDevices;
+ std::vector<std::string> mExcludedDevices;
+
+ int mEpollFd;
+ int mINotifyFd;
+ int mWakeReadPipeFd;
+ int mWakeWritePipeFd;
+
+ int mInputWd;
+ int mVideoWd;
+
+ // 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;
+};
+
+}; // namespace android
+
+#endif // _RUNTIME_EVENT_HUB_H