blob: 0d42d8a94f51511b1c5f258f5b6d0dcf782d234b [file] [log] [blame]
// Copyright 2016 Google Inc. All Rights Reserved.
//
// 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.
#include "starboard/shared/linux/dev_input/dev_input.h"
#include <errno.h>
#include <fcntl.h>
#include <linux/input.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <unistd.h>
#include <vector>
#include <algorithm>
#include <cmath>
#include <map>
#include <string>
#include "starboard/configuration.h"
#include "starboard/directory.h"
#include "starboard/input.h"
#include "starboard/key.h"
#include "starboard/log.h"
#include "starboard/memory.h"
#include "starboard/shared/posix/handle_eintr.h"
#include "starboard/shared/posix/time_internal.h"
#include "starboard/string.h"
namespace starboard {
namespace shared {
namespace dev_input {
namespace {
using ::starboard::shared::starboard::Application;
typedef int FileDescriptor;
const FileDescriptor kInvalidFd = -ENODEV;
enum InputDeviceIds {
kKeyboardDeviceId = 1,
kGamepadDeviceId,
};
enum TouchPadPositionState {
kTouchPadPositionNone = 0,
kTouchPadPositionX = 1,
kTouchPadPositionY = 2,
kTouchPadPositionAll = kTouchPadPositionX | kTouchPadPositionY
};
struct InputDeviceInfo {
InputDeviceInfo() : fd(-1), touchpad_position_state(kTouchPadPositionNone) {}
// File descriptor open for the device
FileDescriptor fd;
// Absolute Axis info.
std::map<int, struct input_absinfo> axis_info;
std::map<int, float> axis_value;
int touchpad_position_state;
};
bool IsTouchpadPositionKnown(InputDeviceInfo* device_info) {
return device_info->touchpad_position_state == kTouchPadPositionAll;
}
// Private implementation of DevInput.
class DevInputImpl : public DevInput {
public:
explicit DevInputImpl(SbWindow window);
DevInputImpl(SbWindow window, FileDescriptor wake_up_fd);
~DevInputImpl() override;
void InitDevInputImpl(SbWindow window);
Event* PollNextSystemEvent() override;
Event* WaitForSystemEventWithTimeout(SbTime time) override;
void WakeSystemEventWait() override;
private:
// Converts an input_event into a kSbEventInput Application::Event. The caller
// is responsible for deleting the returned event.
Event* InputToApplicationEvent(const struct input_event& event,
InputDeviceInfo* device_info,
int modifiers);
// Converts an input_event containing a key input into a kSbEventInput
// Application::Event. The caller is responsible for deleting the returned
// event.
Event* KeyInputToApplicationEvent(const struct input_event& event,
int modifiers);
// Converts an input_event containing an axis event into a kSbEventInput
// Application::Event. The caller is responsible for deleting the returned
// event.
Event* AxisInputToApplicationEvent(const struct input_event& event,
InputDeviceInfo* device_info,
int modifiers);
// The window to attribute /dev/input events to.
SbWindow window_;
// A set of read-only file descriptor of keyboard input devices.
std::vector<InputDeviceInfo> input_devices_;
// A file descriptor of the write end of a pipe that can be written to from
// any thread to wake up this waiter in a thread-safe manner.
FileDescriptor wakeup_write_fd_;
// A file descriptor of the read end of a pipe that this waiter will wait on
// to allow it to be signalled safely from other threads.
FileDescriptor wakeup_read_fd_;
FileDescriptor wake_up_fd_;
};
// Helper class to manage a file descriptor set.
class FdSet {
public:
FdSet() : max_fd_(kInvalidFd) { FD_ZERO(&set_); }
void Set(FileDescriptor fd) {
FD_SET(fd, &set_);
if (fd > max_fd_) {
max_fd_ = fd;
}
}
bool IsSet(FileDescriptor fd) { return FD_ISSET(fd, &set_); }
fd_set* set() { return &set_; }
FileDescriptor max_fd() { return max_fd_; }
private:
fd_set set_;
FileDescriptor max_fd_;
};
// Converts an input_event code into an SbKey.
SbKey KeyCodeToSbKey(uint16_t code) {
switch (code) {
case KEY_BACKSPACE:
return kSbKeyBack;
case KEY_DELETE:
return kSbKeyDelete;
case KEY_TAB:
return kSbKeyTab;
case KEY_LINEFEED:
case KEY_ENTER:
case KEY_KPENTER:
return kSbKeyReturn;
case KEY_CLEAR:
return kSbKeyClear;
case KEY_SPACE:
return kSbKeySpace;
case KEY_HOME:
return kSbKeyHome;
case KEY_END:
return kSbKeyEnd;
case KEY_PAGEUP:
return kSbKeyPrior;
case KEY_PAGEDOWN:
return kSbKeyNext;
case KEY_LEFT:
return kSbKeyLeft;
case KEY_RIGHT:
return kSbKeyRight;
case KEY_DOWN:
return kSbKeyDown;
case KEY_UP:
return kSbKeyUp;
case KEY_ESC:
return kSbKeyEscape;
case KEY_KATAKANA:
case KEY_HIRAGANA:
case KEY_KATAKANAHIRAGANA:
return kSbKeyKana;
case KEY_HANGEUL:
return kSbKeyHangul;
case KEY_HANJA:
return kSbKeyHanja;
case KEY_HENKAN:
return kSbKeyConvert;
case KEY_MUHENKAN:
return kSbKeyNonconvert;
case KEY_ZENKAKUHANKAKU:
return kSbKeyDbeDbcschar;
case KEY_A:
return kSbKeyA;
case KEY_B:
return kSbKeyB;
case KEY_C:
return kSbKeyC;
case KEY_D:
return kSbKeyD;
case KEY_E:
return kSbKeyE;
case KEY_F:
return kSbKeyF;
case KEY_G:
return kSbKeyG;
case KEY_H:
return kSbKeyH;
case KEY_I:
return kSbKeyI;
case KEY_J:
return kSbKeyJ;
case KEY_K:
return kSbKeyK;
case KEY_L:
return kSbKeyL;
case KEY_M:
return kSbKeyM;
case KEY_N:
return kSbKeyN;
case KEY_O:
return kSbKeyO;
case KEY_P:
return kSbKeyP;
case KEY_Q:
return kSbKeyQ;
case KEY_R:
return kSbKeyR;
case KEY_S:
return kSbKeyS;
case KEY_T:
return kSbKeyT;
case KEY_U:
return kSbKeyU;
case KEY_V:
return kSbKeyV;
case KEY_W:
return kSbKeyW;
case KEY_X:
return kSbKeyX;
case KEY_Y:
return kSbKeyY;
case KEY_Z:
return kSbKeyZ;
case KEY_0:
return kSbKey0;
case KEY_1:
return kSbKey1;
case KEY_2:
return kSbKey2;
case KEY_3:
return kSbKey3;
case KEY_4:
return kSbKey4;
case KEY_5:
return kSbKey5;
case KEY_6:
return kSbKey6;
case KEY_7:
return kSbKey7;
case KEY_8:
return kSbKey8;
case KEY_9:
return kSbKey9;
case KEY_NUMERIC_0:
case KEY_NUMERIC_1:
case KEY_NUMERIC_2:
case KEY_NUMERIC_3:
case KEY_NUMERIC_4:
case KEY_NUMERIC_5:
case KEY_NUMERIC_6:
case KEY_NUMERIC_7:
case KEY_NUMERIC_8:
case KEY_NUMERIC_9:
return static_cast<SbKey>(kSbKey0 + (code - KEY_NUMERIC_0));
case KEY_KP0:
return kSbKeyNumpad0;
case KEY_KP1:
return kSbKeyNumpad1;
case KEY_KP2:
return kSbKeyNumpad2;
case KEY_KP3:
return kSbKeyNumpad3;
case KEY_KP4:
return kSbKeyNumpad4;
case KEY_KP5:
return kSbKeyNumpad5;
case KEY_KP6:
return kSbKeyNumpad6;
case KEY_KP7:
return kSbKeyNumpad7;
case KEY_KP8:
return kSbKeyNumpad8;
case KEY_KP9:
return kSbKeyNumpad9;
case KEY_KPASTERISK:
return kSbKeyMultiply;
case KEY_KPDOT:
return kSbKeyDecimal;
case KEY_KPSLASH:
return kSbKeyDivide;
case KEY_KPPLUS:
case KEY_EQUAL:
return kSbKeyOemPlus;
case KEY_COMMA:
return kSbKeyOemComma;
case KEY_KPMINUS:
case KEY_MINUS:
return kSbKeyOemMinus;
case KEY_DOT:
return kSbKeyOemPeriod;
case KEY_SEMICOLON:
return kSbKeyOem1;
case KEY_SLASH:
return kSbKeyOem2;
case KEY_GRAVE:
return kSbKeyOem3;
case KEY_LEFTBRACE:
return kSbKeyOem4;
case KEY_BACKSLASH:
return kSbKeyOem5;
case KEY_RIGHTBRACE:
return kSbKeyOem6;
case KEY_APOSTROPHE:
return kSbKeyOem7;
case KEY_LEFTSHIFT:
case KEY_RIGHTSHIFT:
return kSbKeyShift;
case KEY_LEFTCTRL:
case KEY_RIGHTCTRL:
return kSbKeyControl;
case KEY_LEFTMETA:
case KEY_RIGHTMETA:
case KEY_LEFTALT:
case KEY_RIGHTALT:
return kSbKeyMenu;
case KEY_PAUSE:
return kSbKeyPause;
case KEY_CAPSLOCK:
return kSbKeyCapital;
case KEY_NUMLOCK:
return kSbKeyNumlock;
case KEY_SCROLLLOCK:
return kSbKeyScroll;
case KEY_SELECT:
return kSbKeySelect;
case KEY_PRINT:
return kSbKeyPrint;
case KEY_INSERT:
return kSbKeyInsert;
case KEY_HELP:
return kSbKeyHelp;
case KEY_MENU:
return kSbKeyApps;
case KEY_FN_F1:
case KEY_FN_F2:
case KEY_FN_F3:
case KEY_FN_F4:
case KEY_FN_F5:
case KEY_FN_F6:
case KEY_FN_F7:
case KEY_FN_F8:
case KEY_FN_F9:
case KEY_FN_F10:
case KEY_FN_F11:
case KEY_FN_F12:
return static_cast<SbKey>(kSbKeyF1 + (code - KEY_FN_F1));
// For supporting multimedia buttons on a USB keyboard.
case KEY_BACK:
return kSbKeyBrowserBack;
case KEY_FORWARD:
return kSbKeyBrowserForward;
case KEY_REFRESH:
return kSbKeyBrowserRefresh;
case KEY_STOP:
return kSbKeyBrowserStop;
case KEY_SEARCH:
return kSbKeyBrowserSearch;
case KEY_FAVORITES:
return kSbKeyBrowserFavorites;
case KEY_HOMEPAGE:
return kSbKeyBrowserHome;
case KEY_MUTE:
return kSbKeyVolumeMute;
case KEY_VOLUMEDOWN:
return kSbKeyVolumeDown;
case KEY_VOLUMEUP:
return kSbKeyVolumeUp;
case KEY_NEXTSONG:
return kSbKeyMediaNextTrack;
case KEY_PREVIOUSSONG:
return kSbKeyMediaPrevTrack;
case KEY_STOPCD:
return kSbKeyMediaStop;
case KEY_PLAYPAUSE:
return kSbKeyMediaPlayPause;
case KEY_MAIL:
return kSbKeyMediaLaunchMail;
case KEY_CALC:
return kSbKeyMediaLaunchApp2;
case KEY_WLAN:
return kSbKeyWlan;
case KEY_POWER:
return kSbKeyPower;
case KEY_BRIGHTNESSDOWN:
return kSbKeyBrightnessDown;
case KEY_BRIGHTNESSUP:
return kSbKeyBrightnessUp;
// Gamepad buttons.
// https://www.kernel.org/doc/Documentation/input/gamepad.txt
case BTN_TL:
return kSbKeyGamepadLeftTrigger;
case BTN_TR:
return kSbKeyGamepadRightTrigger;
case BTN_DPAD_DOWN:
return kSbKeyGamepadDPadDown;
case BTN_DPAD_UP:
return kSbKeyGamepadDPadUp;
case BTN_DPAD_LEFT:
return kSbKeyGamepadDPadLeft;
case BTN_DPAD_RIGHT:
return kSbKeyGamepadDPadRight;
// The mapping for the buttons below can vary from controller to controller.
// TODO: Include button mapping for controllers with different layout.
case BTN_B:
return kSbKeyGamepad1;
case BTN_C:
return kSbKeyGamepad2;
case BTN_A:
return kSbKeyGamepad3;
case BTN_X:
return kSbKeyGamepad4;
case BTN_Y:
return kSbKeyGamepadLeftBumper;
case BTN_Z:
return kSbKeyGamepadRightBumper;
case BTN_TL2:
return kSbKeyGamepad5;
case BTN_TR2:
return kSbKeyGamepad6;
case BTN_SELECT:
return kSbKeyGamepadLeftStick;
case BTN_START:
return kSbKeyGamepadRightStick;
case BTN_MODE:
return kSbKeyGamepadSystem;
case BTN_THUMBL:
return kSbKeyGamepad1;
case BTN_THUMBR:
return kSbKeyGamepad1;
}
SB_DLOG(WARNING) << "Unknown code: 0x" << std::hex << code;
return kSbKeyUnknown;
} // NOLINT(readability/fn_size)
// Get a SbKeyLocation from an input_event.code.
SbKeyLocation KeyCodeToSbKeyLocation(uint16_t code) {
switch (code) {
case KEY_LEFTALT:
case KEY_LEFTCTRL:
case KEY_LEFTMETA:
case KEY_LEFTSHIFT:
return kSbKeyLocationLeft;
case KEY_RIGHTALT:
case KEY_RIGHTCTRL:
case KEY_RIGHTMETA:
case KEY_RIGHTSHIFT:
return kSbKeyLocationRight;
}
return kSbKeyLocationUnspecified;
}
// Returns the number of bytes needed to represent a bit set
// of |bit_count| size.
int BytesNeededForBitSet(int bit_count) {
return (bit_count + 7) / 8;
}
// Returns true if |bit| is set in |bitset|.
bool IsBitSet(const std::vector<uint8_t>& bitset, int bit) {
return !!(bitset.at(bit / 8) & (1 << (bit % 8)));
}
bool IsAxisFlat(float median, const struct input_absinfo& axis_info) {
SB_DCHECK((axis_info.flat * 2) <= (axis_info.maximum - axis_info.minimum));
return (axis_info.flat != 0) && (axis_info.value > median - axis_info.flat) &&
(axis_info.value < median + axis_info.flat);
}
float GetAxisValue(const struct input_absinfo& axis_info) {
float median =
static_cast<float>(axis_info.maximum + axis_info.minimum) / 2.0f;
if (IsAxisFlat(median, axis_info))
return 0;
float range = static_cast<float>(axis_info.maximum - axis_info.minimum);
float radius = range / 2.0f;
// Scale the axis value to [-1, 1].
float axis_value = (static_cast<float>(axis_info.value) - median) / radius;
if (axis_info.flat != 0) {
// Calculate the flat value scaled to [0, 1].
float flat = static_cast<float>(axis_info.flat) / range;
int sign = axis_value < 0.0f ? -1 : 1;
// Rescale the range:
// [-1.0f, -flat] to [-1.0f, 0.0f] and [flat, 1.0f] to [0.0f, 1.0f].
axis_value = (axis_value - sign * flat) / (1 - flat);
}
return axis_value;
}
void GetInputDeviceAbsoluteAxisInfo(int axis,
const std::vector<uint8_t>& bits,
InputDeviceInfo* info) {
if (IsBitSet(bits, axis)) {
struct input_absinfo axis_info;
int result = ioctl(info->fd, EVIOCGABS(axis), &axis_info);
if (result < 0) {
return;
}
info->axis_info.insert(std::make_pair(axis, axis_info));
info->axis_value.insert(std::make_pair(axis, GetAxisValue(axis_info)));
}
}
void GetInputDeviceInfo(InputDeviceInfo* info) {
std::vector<uint8_t> axis_bits(BytesNeededForBitSet(KEY_MAX));
int result =
ioctl(info->fd, EVIOCGBIT(EV_ABS, axis_bits.size()), axis_bits.data());
if (result < 0) {
return;
}
GetInputDeviceAbsoluteAxisInfo(ABS_X, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_Y, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_Z, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_RZ, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_RX, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_RY, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_HAT0X, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_HAT0Y, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_MT_POSITION_X, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_MT_POSITION_Y, axis_bits, info);
GetInputDeviceAbsoluteAxisInfo(ABS_MT_TRACKING_ID, axis_bits, info);
// TODO: Handle multi-touch using ABS_MT_SLOT.
}
FileDescriptor OpenDeviceIfKeyboardOrGamepad(const char* path) {
FileDescriptor fd = open(path, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
// Open can fail if the application doesn't have permission to access
// the input device directly.
return kInvalidFd;
}
std::vector<uint8_t> ev_bits(BytesNeededForBitSet(EV_CNT));
std::vector<uint8_t> key_bits(BytesNeededForBitSet(KEY_MAX));
int result = ioctl(fd, EVIOCGBIT(0, ev_bits.size()), ev_bits.data());
if (result < 0) {
close(fd);
return kInvalidFd;
}
bool has_ev_key = IsBitSet(ev_bits, EV_KEY);
if (!has_ev_key) {
close(fd);
return kInvalidFd;
}
result = ioctl(fd, EVIOCGBIT(EV_KEY, key_bits.size()), key_bits.data());
if (result < 0) {
close(fd);
return kInvalidFd;
}
bool has_key_space = IsBitSet(key_bits, KEY_SPACE);
bool has_gamepad_button = IsBitSet(key_bits, BTN_GAMEPAD);
if (!has_key_space && !has_gamepad_button) {
// If it doesn't have a space key or gamepad button, it may be a mouse.
close(fd);
return kInvalidFd;
}
result = ioctl(fd, EVIOCGRAB, 1);
if (result != 0) {
SB_DLOG(ERROR) << __FUNCTION__ << ": "
<< "Unable to get exclusive access to \"" << path << "\".";
close(fd);
return kInvalidFd;
}
return fd;
}
// Searches for the keyboard and game controller /dev/input devices, opens them
// and returns the device info with a file descriptor and absolute axis details.
std::vector<InputDeviceInfo> GetInputDevices() {
const char kDevicePath[] = "/dev/input";
SbDirectory directory = SbDirectoryOpen(kDevicePath, NULL);
std::vector<InputDeviceInfo> input_devices;
if (!SbDirectoryIsValid(directory)) {
SB_DLOG(ERROR) << __FUNCTION__ << ": No /dev/input support, "
<< "unable to open: " << kDevicePath;
return input_devices;
}
while (true) {
SbDirectoryEntry entry;
if (!SbDirectoryGetNext(directory, &entry)) {
break;
}
std::string path = kDevicePath;
path += "/";
path += entry.name;
if (SbDirectoryCanOpen(path.c_str())) {
// This is a subdirectory. Skip.
continue;
}
FileDescriptor fd = OpenDeviceIfKeyboardOrGamepad(path.c_str());
if (fd == kInvalidFd) {
continue;
}
InputDeviceInfo info;
info.fd = fd;
GetInputDeviceInfo(&info);
SB_DCHECK(info.fd != kInvalidFd);
input_devices.push_back(info);
}
if (input_devices.empty()) {
SB_DLOG(ERROR) << __FUNCTION__ << ": No /dev/input support. "
<< "No keyboards or game controllers available.";
}
SbDirectoryClose(directory);
return input_devices;
}
// Returns whether |key_code|'s bit is set in the bitmap |map|, assuming
// |key_code| fits into |map|.
bool TestKey(int key_code, char* map) {
return map[key_code / 8] & (1 << (key_code % 8));
}
// Returns whether |key_code|'s bit is set in the bitmap |map|, assuming
// |key_code| fits into |map|.
int GetModifier(int left_key_code,
int right_key_code,
SbKeyModifiers modifier,
char* map) {
if (TestKey(left_key_code, map) || TestKey(right_key_code, map)) {
return modifier;
}
return 0;
}
// Polls the given input file descriptor for an input_event. If there are no
// bytes available, assumes that there is no input event to read. If it gets a
// partial event, it will assume that it will be completed, and spins until it
// receives an entire event.
bool PollInputEvent(InputDeviceInfo* device_info,
struct input_event* out_event,
int* out_modifiers) {
if (device_info->fd == kInvalidFd) {
return false;
}
SB_DCHECK(out_event);
SB_DCHECK(out_modifiers);
const size_t kEventSize = sizeof(struct input_event);
size_t remaining = kEventSize;
char* buffer = reinterpret_cast<char*>(out_event);
while (remaining > 0) {
int bytes_read = read(device_info->fd, buffer, remaining);
if (bytes_read <= 0) {
if (errno == EAGAIN || bytes_read == 0) {
if (remaining == kEventSize) {
// Normal nothing there case.
return false;
}
// We have a partial read, so keep trying.
continue;
}
// Some unexpected type of read error occured.
SB_DLOG(ERROR) << __FUNCTION__ << ": Error reading input: " << errno
<< " - " << strerror(errno);
return false;
}
SB_DCHECK(bytes_read <= remaining)
<< "bytes_read=" << bytes_read << ", remaining=" << remaining;
remaining -= bytes_read;
buffer += bytes_read;
}
if ((out_event->type != EV_KEY) && (out_event->type != EV_ABS)) {
return false;
}
// Calculate modifiers.
int modifiers = 0;
char map[(KEY_MAX / 8) + 1] = {0};
errno = 0;
int result = ioctl(device_info->fd, EVIOCGKEY(sizeof(map)), map);
if (result != -1) {
modifiers |=
GetModifier(KEY_LEFTSHIFT, KEY_RIGHTSHIFT, kSbKeyModifiersShift, map);
modifiers |=
GetModifier(KEY_LEFTALT, KEY_RIGHTALT, kSbKeyModifiersAlt, map);
modifiers |=
GetModifier(KEY_LEFTCTRL, KEY_RIGHTCTRL, kSbKeyModifiersCtrl, map);
modifiers |=
GetModifier(KEY_LEFTMETA, KEY_RIGHTMETA, kSbKeyModifiersMeta, map);
} else {
SB_DLOG(ERROR) << __FUNCTION__ << ": Error getting modifiers: " << errno
<< " - " << strerror(errno);
}
*out_modifiers = modifiers;
return true;
}
// Simple helper to close a FileDescriptor if set, and to set it to kInvalidFd,
// to ensure it doesn't get used after close.
void CloseFdSafely(FileDescriptor* fd) {
if (*fd != kInvalidFd) {
close(*fd);
*fd = kInvalidFd;
}
}
// Also in starboard/shared/libevent/socket_waiter_internal.cc
// TODO: Consider consolidating.
int SetNonBlocking(FileDescriptor fd) {
int flags = fcntl(fd, F_GETFL, 0);
if (flags == -1) {
flags = 0;
}
return fcntl(fd, F_SETFL, flags | O_NONBLOCK);
}
DevInputImpl::DevInputImpl(SbWindow window)
: window_(window),
input_devices_(GetInputDevices()),
wakeup_write_fd_(kInvalidFd),
wakeup_read_fd_(kInvalidFd),
wake_up_fd_(kInvalidFd) {
InitDevInputImpl(window);
}
DevInputImpl::DevInputImpl(SbWindow window, FileDescriptor wake_up_fd)
: window_(window),
input_devices_(GetInputDevices()),
wakeup_write_fd_(kInvalidFd),
wakeup_read_fd_(kInvalidFd),
wake_up_fd_(wake_up_fd) {
InitDevInputImpl(window);
}
void DevInputImpl::InitDevInputImpl(SbWindow window) {
// Initialize wakeup pipe.
FileDescriptor fds[2] = {kInvalidFd, kInvalidFd};
int result = pipe(fds);
SB_DCHECK(result == 0) << "result=" << result;
wakeup_read_fd_ = fds[0];
SB_DCHECK(wakeup_read_fd_ != kInvalidFd);
result = SetNonBlocking(wakeup_read_fd_);
SB_DCHECK(result == 0) << "result=" << result;
wakeup_write_fd_ = fds[1];
SB_DCHECK(wakeup_write_fd_ != kInvalidFd);
result = SetNonBlocking(wakeup_write_fd_);
SB_DCHECK(result == 0) << "result=" << result;
}
DevInputImpl::~DevInputImpl() {
for (const auto& device : input_devices_) {
close(device.fd);
}
CloseFdSafely(&wakeup_write_fd_);
CloseFdSafely(&wakeup_read_fd_);
}
DevInput::Event* DevInputImpl::PollNextSystemEvent() {
struct input_event event;
int modifiers = 0;
for (auto& device : input_devices_) {
if (!PollInputEvent(&device, &event, &modifiers)) {
continue;
}
return InputToApplicationEvent(event, &device, modifiers);
}
return NULL;
}
DevInput::Event* DevInputImpl::WaitForSystemEventWithTimeout(SbTime duration) {
Event* event = PollNextSystemEvent();
if (event) {
return event;
}
FdSet read_set;
if (wake_up_fd_ != kInvalidFd) {
read_set.Set(wake_up_fd_);
}
for (std::vector<InputDeviceInfo>::const_iterator it = input_devices_.begin();
it != input_devices_.end(); ++it) {
read_set.Set(it->fd);
}
read_set.Set(wakeup_read_fd_);
struct timeval tv;
SbTime clamped_duration = std::max(duration, (SbTime)0);
ToTimevalDuration(clamped_duration, &tv);
if (select(read_set.max_fd() + 1, read_set.set(), NULL, NULL, &tv) == 0) {
// This is the timeout case.
return NULL;
}
// We may have been woken up, so let's consume one wakeup, if selected.
if (read_set.IsSet(wakeup_read_fd_)) {
char buf;
int bytes_read = HANDLE_EINTR(read(wakeup_read_fd_, &buf, 1));
SB_DCHECK(bytes_read == 1);
}
return PollNextSystemEvent();
}
void DevInputImpl::WakeSystemEventWait() {
char buf = 1;
while (true) {
int bytes_written = HANDLE_EINTR(write(wakeup_write_fd_, &buf, 1));
if (bytes_written > 0) {
SB_DCHECK(bytes_written == 1) << "bytes_written=" << bytes_written;
return;
}
if (errno == EAGAIN) {
continue;
}
SB_DLOG(FATAL) << __FUNCTION__ << ": errno=" << errno << " - "
<< strerror(errno);
}
}
namespace {
// Creates a key event for an analog button input.
DevInput::Event* CreateAnalogButtonKeyEvent(SbWindow window,
float axis_value,
float previous_axis_value,
SbKey key,
SbKeyLocation location,
int modifiers,
const struct input_event& event) {
SbInputEventType previous_type =
(std::abs(previous_axis_value) > 0.5 ? kSbInputEventTypePress
: kSbInputEventTypeUnpress);
SbInputEventType type =
(std::abs(axis_value) > 0.5 ? kSbInputEventTypePress
: kSbInputEventTypeUnpress);
if (previous_type == type) {
// Key press/unpress state did not change.
return NULL;
}
SbInputData* data = new SbInputData();
SbMemorySet(data, 0, sizeof(*data));
data->window = window;
data->type = type;
data->device_type = kSbInputDeviceTypeGamepad;
data->device_id = kGamepadDeviceId;
data->key = key;
data->key_location = location;
data->key_modifiers = modifiers;
return new DevInput::Event(kSbEventTypeInput, data,
&Application::DeleteDestructor<SbInputData>);
}
// Creates a move event with key for a stick input.
DevInput::Event* CreateMoveEventWithKey(SbWindow window,
SbKey key,
SbKeyLocation location,
int modifiers,
const SbInputVector& input_vector) {
SbInputData* data = new SbInputData();
SbMemorySet(data, 0, sizeof(*data));
data->window = window;
data->type = kSbInputEventTypeMove;
data->device_type = kSbInputDeviceTypeGamepad;
data->device_id = kGamepadDeviceId;
data->key = key;
data->key_location = location;
data->key_modifiers = modifiers;
data->position = input_vector;
#if SB_API_VERSION >= 6
data->pressure = NAN;
data->size = {NAN, NAN};
data->tilt = {NAN, NAN};
#endif
return new DevInput::Event(kSbEventTypeInput, data,
&Application::DeleteDestructor<SbInputData>);
}
DevInput::Event* CreateTouchPadEvent(SbWindow window,
SbInputEventType type,
SbKey key,
SbKeyLocation location,
int modifiers,
const SbInputVector& input_vector) {
SbInputData* data = new SbInputData();
SbMemorySet(data, 0, sizeof(*data));
data->window = window;
data->type = type;
data->device_type = kSbInputDeviceTypeTouchPad;
data->device_id = kGamepadDeviceId;
data->key = key;
data->key_location = location;
data->key_modifiers = modifiers;
data->position = input_vector;
#if SB_API_VERSION >= 6
data->pressure = NAN;
data->size = {NAN, NAN};
data->tilt = {NAN, NAN};
#endif
return new DevInput::Event(kSbEventTypeInput, data,
&Application::DeleteDestructor<SbInputData>);
}
} // namespace
DevInput::Event* DevInputImpl::AxisInputToApplicationEvent(
const struct input_event& event,
InputDeviceInfo* device_info,
int modifiers) {
SB_DCHECK(event.type == EV_ABS);
SbKey key = kSbKeyUnknown;
float axis_value = 0;
float previous_axis_value = 0;
auto axis_info_it = device_info->axis_info.find(event.code);
if (axis_info_it != device_info->axis_info.end()) {
struct input_absinfo& axis_info = axis_info_it->second;
axis_info.value = event.value;
axis_value = GetAxisValue(axis_info);
float& stored_axis_value = device_info->axis_value[event.code];
previous_axis_value = stored_axis_value;
if (previous_axis_value == axis_value) {
// If the value is unchanged, don't do anything.
return NULL;
}
stored_axis_value = axis_value;
}
SbKeyLocation location = kSbKeyLocationUnspecified;
SbInputVector input_vector;
// The mapping for the axis codes can vary from controller to controller.
// TODO: Include axis mapping for controllers with different layout.
// Report up and left as negative values.
switch (event.code) {
case ABS_X:
input_vector.x = axis_value;
input_vector.y = device_info->axis_value[ABS_Y];
key = kSbKeyGamepadLeftStickLeft;
location = kSbKeyLocationLeft;
return CreateMoveEventWithKey(window_, key, location, modifiers,
input_vector);
case ABS_Y: {
input_vector.x = device_info->axis_value[ABS_X];
input_vector.y = axis_value;
key = kSbKeyGamepadLeftStickUp;
location = kSbKeyLocationLeft;
return CreateMoveEventWithKey(window_, key, location, modifiers,
input_vector);
}
case ABS_Z:
input_vector.x = axis_value;
input_vector.y = device_info->axis_value[ABS_RZ];
key = kSbKeyGamepadRightStickLeft;
location = kSbKeyLocationRight;
return CreateMoveEventWithKey(window_, key, location, modifiers,
input_vector);
case ABS_RZ:
input_vector.x = device_info->axis_value[ABS_Z];
input_vector.y = axis_value;
key = kSbKeyGamepadRightStickUp;
location = kSbKeyLocationRight;
return CreateMoveEventWithKey(window_, key, location, modifiers,
input_vector);
case ABS_RX: {
key = kSbKeyGamepadLeftTrigger;
location = kSbKeyLocationLeft;
// For trigger buttons, the range is [0..1].
float trigger_value = (axis_value + 1) / 2;
float previous_trigger_value = (previous_axis_value + 1) / 2;
return CreateAnalogButtonKeyEvent(window_, trigger_value,
previous_trigger_value, key, location,
modifiers, event);
}
case ABS_RY: {
key = kSbKeyGamepadRightTrigger;
location = kSbKeyLocationRight;
// For trigger buttons, the range is [0..1].
float trigger_value = (axis_value + 1) / 2;
float previous_trigger_value = (previous_axis_value + 1) / 2;
return CreateAnalogButtonKeyEvent(window_, trigger_value,
previous_trigger_value, key, location,
modifiers, event);
}
case ABS_HAT0X: {
float axis_value_for_key =
std::abs(axis_value) > 0.5f ? axis_value : previous_axis_value;
key = (axis_value_for_key < 0) ? kSbKeyGamepadDPadLeft
: kSbKeyGamepadDPadRight;
return CreateAnalogButtonKeyEvent(window_, axis_value,
previous_axis_value, key, location,
modifiers, event);
}
case ABS_HAT0Y: {
float axis_value_for_key =
std::abs(axis_value) > 0.5f ? axis_value : previous_axis_value;
key = (axis_value_for_key < 0) ? kSbKeyGamepadDPadUp
: kSbKeyGamepadDPadDown;
return CreateAnalogButtonKeyEvent(window_, axis_value,
previous_axis_value, key, location,
modifiers, event);
}
case ABS_MT_TRACKING_ID:
if (event.value == -1) {
bool touchpad_position_is_known = IsTouchpadPositionKnown(device_info);
device_info->touchpad_position_state = kTouchPadPositionNone;
if (touchpad_position_is_known) {
// Touch point is released, report last known position as unpress.
input_vector.x = device_info->axis_value[ABS_MT_POSITION_X];
input_vector.y = device_info->axis_value[ABS_MT_POSITION_Y];
return CreateTouchPadEvent(window_, kSbInputEventTypeUnpress, key,
location, modifiers, input_vector);
}
}
return NULL;
case ABS_MT_POSITION_X: {
// If all positions were known before this event, then this event is a
// move.
SbInputEventType type = IsTouchpadPositionKnown(device_info)
? kSbInputEventTypeMove
: kSbInputEventTypePress;
device_info->touchpad_position_state |= kTouchPadPositionX;
if (IsTouchpadPositionKnown(device_info)) {
// For touchpads, the unit range is [-1..1]. Negative values for top
// left.
input_vector.x = axis_value;
input_vector.y = device_info->axis_value[ABS_MT_POSITION_Y];
return CreateTouchPadEvent(window_, type, key, location, modifiers,
input_vector);
}
// Not all axis positions are known yet.
return NULL;
}
case ABS_MT_POSITION_Y: {
// If all positions were known before this event, then this event is a
// move.
SbInputEventType type = IsTouchpadPositionKnown(device_info)
? kSbInputEventTypeMove
: kSbInputEventTypePress;
device_info->touchpad_position_state |= kTouchPadPositionY;
if (IsTouchpadPositionKnown(device_info)) {
// For touchpads, the range is [-1..1]. Negative values for top left.
input_vector.x = device_info->axis_value[ABS_MT_POSITION_X];
input_vector.y = axis_value;
return CreateTouchPadEvent(window_, type, key, location, modifiers,
input_vector);
}
// Not all axis positions are known yet.
return NULL;
}
default:
// Ignored event codes.
return NULL;
}
SB_NOTREACHED();
return NULL;
}
DevInput::Event* DevInputImpl::KeyInputToApplicationEvent(
const struct input_event& event,
int modifiers) {
SB_DCHECK(event.type == EV_KEY);
SB_DCHECK(event.value <= 2);
SbInputData* data = new SbInputData();
SbMemorySet(data, 0, sizeof(*data));
data->window = window_;
data->type =
(event.value == 0 ? kSbInputEventTypeUnpress : kSbInputEventTypePress);
data->device_type = kSbInputDeviceTypeKeyboard;
data->device_id = kKeyboardDeviceId;
data->key = KeyCodeToSbKey(event.code);
data->key_location = KeyCodeToSbKeyLocation(event.code);
data->key_modifiers = modifiers;
return new Event(kSbEventTypeInput, data,
&Application::DeleteDestructor<SbInputData>);
}
DevInput::Event* DevInputImpl::InputToApplicationEvent(
const struct input_event& event,
InputDeviceInfo* device_info,
int modifiers) {
// EV_ABS events are axis values: Sticks, dpad, and touchpad.
// https://www.kernel.org/doc/Documentation/input/event-codes.txt
switch (event.type) {
case EV_ABS:
return AxisInputToApplicationEvent(event, device_info, modifiers);
case EV_KEY:
return KeyInputToApplicationEvent(event, modifiers);
}
return NULL;
}
} // namespace
// static
DevInput* DevInput::Create(SbWindow window) {
return new DevInputImpl(window);
}
// static
DevInput* DevInput::Create(SbWindow window, int wake_up_fd) {
return new DevInputImpl(window, wake_up_fd);
}
} // namespace dev_input
} // namespace shared
} // namespace starboard