62576ec6f3
Merge commit '3922484d7458a4ab72fc1ca8952a0776dd1c7d20' into gingerbread-plus-aosp * commit '3922484d7458a4ab72fc1ca8952a0776dd1c7d20': Optimize EventHub reads.
281 lines
9.1 KiB
C++
281 lines
9.1 KiB
C++
/*
|
|
* 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 <android/input.h>
|
|
#include <utils/String8.h>
|
|
#include <utils/threads.h>
|
|
#include <utils/Log.h>
|
|
#include <utils/threads.h>
|
|
#include <utils/List.h>
|
|
#include <utils/Errors.h>
|
|
|
|
#include <linux/input.h>
|
|
|
|
/* These constants are not defined in linux/input.h but they are part of the multitouch
|
|
* input protocol. */
|
|
|
|
#define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */
|
|
#define ABS_MT_TOUCH_MINOR 0x31 /* Minor axis (omit if circular) */
|
|
#define ABS_MT_WIDTH_MAJOR 0x32 /* Major axis of approaching ellipse */
|
|
#define ABS_MT_WIDTH_MINOR 0x33 /* Minor axis (omit if circular) */
|
|
#define ABS_MT_ORIENTATION 0x34 /* Ellipse orientation */
|
|
#define ABS_MT_POSITION_X 0x35 /* Center X ellipse position */
|
|
#define ABS_MT_POSITION_Y 0x36 /* Center Y ellipse position */
|
|
#define ABS_MT_TOOL_TYPE 0x37 /* Type of touching device (finger, pen, ...) */
|
|
#define ABS_MT_BLOB_ID 0x38 /* Group a set of packets as a blob */
|
|
#define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */
|
|
#define ABS_MT_PRESSURE 0x3a /* Pressure on contact area */
|
|
|
|
#define MT_TOOL_FINGER 0 /* Identifies a finger */
|
|
#define MT_TOOL_PEN 1 /* Identifies a pen */
|
|
|
|
#define SYN_MT_REPORT 2
|
|
|
|
/* Convenience constants. */
|
|
|
|
#define BTN_FIRST 0x100 // first button scancode
|
|
#define BTN_LAST 0x15f // last button scancode
|
|
|
|
struct pollfd;
|
|
|
|
namespace android {
|
|
|
|
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 {
|
|
/* The input device is a keyboard. */
|
|
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 (either single-touch or multi-touch). */
|
|
INPUT_DEVICE_CLASS_TOUCHSCREEN = 0x00000004,
|
|
|
|
/* The input device is a trackball. */
|
|
INPUT_DEVICE_CLASS_TRACKBALL = 0x00000008,
|
|
|
|
/* The input device is a multi-touch touchscreen. */
|
|
INPUT_DEVICE_CLASS_TOUCHSCREEN_MT= 0x00000010,
|
|
|
|
/* The input device is a directional pad. */
|
|
INPUT_DEVICE_CLASS_DPAD = 0x00000020,
|
|
|
|
/* The input device is a gamepad (implies keyboard). */
|
|
INPUT_DEVICE_CLASS_GAMEPAD = 0x00000040,
|
|
|
|
/* The input device has switches. */
|
|
INPUT_DEVICE_CLASS_SWITCH = 0x00000080,
|
|
};
|
|
|
|
/*
|
|
* 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 provies 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 virtual RefBase {
|
|
protected:
|
|
EventHubInterface() { }
|
|
virtual ~EventHubInterface() { }
|
|
|
|
public:
|
|
// Synthetic raw event type codes produced when devices are added or removed.
|
|
enum {
|
|
DEVICE_ADDED = 0x10000000,
|
|
DEVICE_REMOVED = 0x20000000
|
|
};
|
|
|
|
virtual uint32_t getDeviceClasses(int32_t deviceId) const = 0;
|
|
|
|
virtual String8 getDeviceName(int32_t deviceId) 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;
|
|
|
|
// exclude a particular device from opening
|
|
// this can be used to ignore input devices for sensors
|
|
virtual void addExcludedDevice(const char* deviceName) = 0;
|
|
|
|
/*
|
|
* Wait for the next event to become available and return it.
|
|
* 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).
|
|
*/
|
|
virtual bool getEvent(RawEvent* outEvent) = 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;
|
|
|
|
/*
|
|
* 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;
|
|
};
|
|
|
|
class EventHub : public EventHubInterface
|
|
{
|
|
public:
|
|
EventHub();
|
|
|
|
status_t errorCheck() const;
|
|
|
|
virtual uint32_t getDeviceClasses(int32_t deviceId) const;
|
|
|
|
virtual String8 getDeviceName(int32_t deviceId) 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 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 markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
|
|
const int32_t* keyCodes, uint8_t* outFlags) const;
|
|
|
|
virtual bool getEvent(RawEvent* outEvent);
|
|
|
|
protected:
|
|
virtual ~EventHub();
|
|
|
|
private:
|
|
bool openPlatformInput(void);
|
|
|
|
int open_device(const char *device);
|
|
int close_device(const char *device);
|
|
int scan_dir(const char *dirname);
|
|
int read_notify(int nfd);
|
|
|
|
status_t mError;
|
|
|
|
struct device_t {
|
|
const int32_t id;
|
|
const String8 path;
|
|
String8 name;
|
|
uint32_t classes;
|
|
uint8_t* keyBitmask;
|
|
KeyLayoutMap* layoutMap;
|
|
String8 keylayoutFilename;
|
|
int fd;
|
|
device_t* next;
|
|
|
|
device_t(int32_t _id, const char* _path, const char* name);
|
|
~device_t();
|
|
};
|
|
|
|
device_t* getDevice(int32_t deviceId) const;
|
|
bool hasKeycode(device_t* device, int keycode) const;
|
|
|
|
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;
|
|
|
|
bool mHaveFirstKeyboard;
|
|
int32_t mFirstKeyboardId; // the API is that the built-in keyboard is id 0, so map it
|
|
|
|
struct device_ent {
|
|
device_t* device;
|
|
uint32_t seq;
|
|
};
|
|
device_ent *mDevicesById;
|
|
int mNumDevicesById;
|
|
|
|
device_t *mOpeningDevices;
|
|
device_t *mClosingDevices;
|
|
|
|
device_t **mDevices;
|
|
struct pollfd *mFDs;
|
|
int mFDCount;
|
|
|
|
bool mOpened;
|
|
List<String8> mExcludedDevices;
|
|
|
|
// device ids that report particular switches.
|
|
#ifdef EV_SW
|
|
int32_t mSwitches[SW_MAX + 1];
|
|
#endif
|
|
|
|
static const int INPUT_BUFFER_SIZE = 64;
|
|
struct input_event mInputBufferData[INPUT_BUFFER_SIZE];
|
|
int32_t mInputBufferIndex;
|
|
int32_t mInputBufferCount;
|
|
int32_t mInputDeviceIndex;
|
|
};
|
|
|
|
}; // namespace android
|
|
|
|
#endif // _RUNTIME_EVENT_HUB_H
|