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moonlight-qt/app/streaming/input.cpp

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#include <Limelight.h>
#include <SDL.h>
#include "streaming/session.h"
#include "settings/mappingmanager.h"
#include "path.h"
#include <QtGlobal>
#include <QDir>
#define VK_0 0x30
#define VK_A 0x41
// These are real Windows VK_* codes
#ifndef VK_F1
#define VK_F1 0x70
#define VK_F13 0x7C
#define VK_NUMPAD0 0x60
#endif
// How long the mouse button will be pressed for a tap to click gesture
#define TAP_BUTTON_RELEASE_DELAY 100
// How long the fingers must be stationary to start a drag
#define DRAG_ACTIVATION_DELAY 650
// How far the finger can move before it cancels a drag or tap
#define DEAD_ZONE_DELTA 0.1f
const int SdlInputHandler::k_ButtonMap[] = {
A_FLAG, B_FLAG, X_FLAG, Y_FLAG,
BACK_FLAG, SPECIAL_FLAG, PLAY_FLAG,
LS_CLK_FLAG, RS_CLK_FLAG,
LB_FLAG, RB_FLAG,
UP_FLAG, DOWN_FLAG, LEFT_FLAG, RIGHT_FLAG
};
SdlInputHandler::SdlInputHandler(StreamingPreferences& prefs, NvComputer* computer, int streamWidth, int streamHeight)
: m_LastMouseMotionTime(0),
m_MultiController(prefs.multiController),
m_NeedsInputDelay(false),
m_LeftButtonReleaseTimer(0),
m_RightButtonReleaseTimer(0),
m_DragTimer(0),
m_DragButton(0),
m_NumFingersDown(0),
m_StreamWidth(streamWidth),
m_StreamHeight(streamHeight)
{
// Allow gamepad input when the app doesn't have focus
SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
// If mouse acceleration is enabled, use relative mode warp (which
// is via normal motion events that are influenced by mouse acceleration).
// Otherwise, we'll use raw input capture which is straight from the device
// without modification by the OS.
SDL_SetHint(SDL_HINT_MOUSE_RELATIVE_MODE_WARP,
prefs.mouseAcceleration ? "1" : "0");
// We need to reinit this each time, since you only get
// an initial set of gamepad arrival events once per init.
SDL_assert(!SDL_WasInit(SDL_INIT_GAMECONTROLLER));
if (SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER) failed: %s",
SDL_GetError());
}
MappingManager mappingManager;
mappingManager.applyMappings();
if (!m_MultiController) {
// Player 1 is always present in non-MC mode
m_GamepadMask = 0x1;
}
else {
// Otherwise, detect gamepads on the fly
m_GamepadMask = 0;
}
// Prior to GFE 3.14.1, sending too many mouse motion events can cause
// GFE to choke and input latency to increase significantly. We will
// artificially throttle them to avoid this situation.
QVector<int> gfeVersion = NvHTTP::parseQuad(computer->gfeVersion);
if (gfeVersion.isEmpty() || // Very old versions don't have GfeVersion at all
gfeVersion[0] < 3 ||
(gfeVersion[0] == 3 && gfeVersion[1] < 14) ||
(gfeVersion[0] == 3 && gfeVersion[1] == 14 && gfeVersion[2] < 1)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"This older version of GFE requires input delay hack");
m_NeedsInputDelay = true;
}
SDL_zero(m_GamepadState);
SDL_zero(m_TouchDownEvent);
SDL_zero(m_CumulativeDelta);
}
SdlInputHandler::~SdlInputHandler()
{
for (int i = 0; i < MAX_GAMEPADS; i++) {
if (m_GamepadState[i].controller != nullptr) {
SDL_GameControllerClose(m_GamepadState[i].controller);
}
}
SDL_RemoveTimer(m_LeftButtonReleaseTimer);
SDL_RemoveTimer(m_RightButtonReleaseTimer);
SDL_RemoveTimer(m_DragTimer);
SDL_QuitSubSystem(SDL_INIT_GAMECONTROLLER);
SDL_assert(!SDL_WasInit(SDL_INIT_GAMECONTROLLER));
}
void SdlInputHandler::handleKeyEvent(SDL_KeyboardEvent* event)
{
short keyCode;
char modifiers;
// Check for our special key combos
if ((event->state == SDL_PRESSED) &&
(event->keysym.mod & KMOD_CTRL) &&
(event->keysym.mod & KMOD_ALT) &&
(event->keysym.mod & KMOD_SHIFT)) {
// Check for quit combo (Ctrl+Alt+Shift+Q)
if (event->keysym.sym == SDLK_q) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Detected quit key combo");
// Push a quit event to the main loop
SDL_Event event;
event.type = SDL_QUIT;
event.quit.timestamp = SDL_GetTicks();
SDL_PushEvent(&event);
return;
}
// Check for the unbind combo (Ctrl+Alt+Shift+Z)
else if (event->keysym.sym == SDLK_z) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Detected mouse capture toggle combo");
// Stop handling future input
SDL_SetRelativeMouseMode((SDL_bool)!SDL_GetRelativeMouseMode());
// Force raise all keys to ensure they aren't stuck,
// since we won't get their key up events.
raiseAllKeys();
return;
}
// Check for the full-screen combo (Ctrl+Alt+Shift+X)
else if (event->keysym.sym == SDLK_x) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Detected full-screen toggle combo");
Session::s_ActiveSession->toggleFullscreen();
// Force raise all keys just be safe across this full-screen/windowed
// transition just in case key events get lost.
raiseAllKeys();
return;
}
}
if (!SDL_GetRelativeMouseMode()) {
// Not capturing
return;
}
// Set modifier flags
modifiers = 0;
if (event->keysym.mod & KMOD_CTRL) {
modifiers |= MODIFIER_CTRL;
}
if (event->keysym.mod & KMOD_ALT) {
modifiers |= MODIFIER_ALT;
}
if (event->keysym.mod & KMOD_SHIFT) {
modifiers |= MODIFIER_SHIFT;
}
// Set keycode. We explicitly use scancode here because GFE will try to correct
// for AZERTY layouts on the host but it depends on receiving VK_ values matching
// a QWERTY layout to work.
if (event->keysym.scancode >= SDL_SCANCODE_1 && event->keysym.scancode <= SDL_SCANCODE_9) {
// SDL defines SDL_SCANCODE_0 > SDL_SCANCODE_9, so we need to handle that manually
keyCode = (event->keysym.scancode - SDL_SCANCODE_1) + VK_0 + 1;
}
else if (event->keysym.scancode >= SDL_SCANCODE_A && event->keysym.scancode <= SDL_SCANCODE_Z) {
keyCode = (event->keysym.scancode - SDL_SCANCODE_A) + VK_A;
}
else if (event->keysym.scancode >= SDL_SCANCODE_F1 && event->keysym.scancode <= SDL_SCANCODE_F12) {
keyCode = (event->keysym.scancode - SDL_SCANCODE_F1) + VK_F1;
}
else if (event->keysym.scancode >= SDL_SCANCODE_F13 && event->keysym.scancode <= SDL_SCANCODE_F24) {
keyCode = (event->keysym.scancode - SDL_SCANCODE_F13) + VK_F13;
}
else if (event->keysym.scancode >= SDL_SCANCODE_KP_1 && event->keysym.scancode <= SDL_SCANCODE_KP_9) {
// SDL defines SDL_SCANCODE_KP_0 > SDL_SCANCODE_KP_9, so we need to handle that manually
keyCode = (event->keysym.scancode - SDL_SCANCODE_KP_1) + VK_NUMPAD0 + 1;
}
else {
switch (event->keysym.scancode) {
case SDL_SCANCODE_BACKSPACE:
keyCode = 0x08;
break;
case SDL_SCANCODE_TAB:
keyCode = 0x09;
break;
case SDL_SCANCODE_CLEAR:
keyCode = 0x0C;
break;
case SDL_SCANCODE_KP_ENTER: // FIXME: Is this correct?
case SDL_SCANCODE_RETURN:
keyCode = 0x0D;
break;
case SDL_SCANCODE_PAUSE:
keyCode = 0x13;
break;
case SDL_SCANCODE_CAPSLOCK:
keyCode = 0x14;
break;
case SDL_SCANCODE_ESCAPE:
keyCode = 0x1B;
break;
case SDL_SCANCODE_SPACE:
keyCode = 0x20;
break;
case SDL_SCANCODE_PAGEUP:
keyCode = 0x21;
break;
case SDL_SCANCODE_PAGEDOWN:
keyCode = 0x22;
break;
case SDL_SCANCODE_END:
keyCode = 0x23;
break;
case SDL_SCANCODE_HOME:
keyCode = 0x24;
break;
case SDL_SCANCODE_LEFT:
keyCode = 0x25;
break;
case SDL_SCANCODE_UP:
keyCode = 0x26;
break;
case SDL_SCANCODE_RIGHT:
keyCode = 0x27;
break;
case SDL_SCANCODE_DOWN:
keyCode = 0x28;
break;
case SDL_SCANCODE_SELECT:
keyCode = 0x29;
break;
case SDL_SCANCODE_EXECUTE:
keyCode = 0x2B;
break;
case SDL_SCANCODE_PRINTSCREEN:
keyCode = 0x2C;
break;
case SDL_SCANCODE_INSERT:
keyCode = 0x2D;
break;
case SDL_SCANCODE_DELETE:
keyCode = 0x2E;
break;
case SDL_SCANCODE_HELP:
keyCode = 0x2F;
break;
case SDL_SCANCODE_KP_0:
// See comment above about why we only handle SDL_SCANCODE_KP_0 here
keyCode = VK_NUMPAD0;
break;
case SDL_SCANCODE_0:
// See comment above about why we only handle SDL_SCANCODE_0 here
keyCode = VK_0;
break;
case SDL_SCANCODE_KP_MULTIPLY:
keyCode = 0x6A;
break;
case SDL_SCANCODE_KP_PLUS:
keyCode = 0x6B;
break;
case SDL_SCANCODE_KP_COMMA:
keyCode = 0x6C;
break;
case SDL_SCANCODE_KP_MINUS:
keyCode = 0x6D;
break;
case SDL_SCANCODE_KP_PERIOD:
keyCode = 0x6E;
break;
case SDL_SCANCODE_KP_DIVIDE:
keyCode = 0x6F;
break;
case SDL_SCANCODE_NUMLOCKCLEAR:
keyCode = 0x90;
break;
case SDL_SCANCODE_SCROLLLOCK:
keyCode = 0x91;
break;
case SDL_SCANCODE_LSHIFT:
keyCode = 0xA0;
break;
case SDL_SCANCODE_RSHIFT:
keyCode = 0xA1;
break;
case SDL_SCANCODE_LCTRL:
keyCode = 0xA2;
break;
case SDL_SCANCODE_RCTRL:
keyCode = 0xA3;
break;
case SDL_SCANCODE_LALT:
keyCode = 0xA4;
break;
case SDL_SCANCODE_RALT:
keyCode = 0xA5;
break;
case SDL_SCANCODE_AC_BACK:
keyCode = 0xA6;
break;
case SDL_SCANCODE_AC_FORWARD:
keyCode = 0xA7;
break;
case SDL_SCANCODE_AC_REFRESH:
keyCode = 0xA8;
break;
case SDL_SCANCODE_AC_STOP:
keyCode = 0xA9;
break;
case SDL_SCANCODE_AC_SEARCH:
keyCode = 0xAA;
break;
case SDL_SCANCODE_AC_BOOKMARKS:
keyCode = 0xAB;
break;
case SDL_SCANCODE_AC_HOME:
keyCode = 0xAC;
break;
case SDL_SCANCODE_SEMICOLON:
keyCode = 0xBA;
break;
case SDL_SCANCODE_EQUALS:
keyCode = 0xBB;
break;
case SDL_SCANCODE_COMMA:
keyCode = 0xBC;
break;
case SDL_SCANCODE_MINUS:
keyCode = 0xBD;
break;
case SDL_SCANCODE_PERIOD:
keyCode = 0xBE;
break;
case SDL_SCANCODE_SLASH:
keyCode = 0xBF;
break;
case SDL_SCANCODE_GRAVE:
keyCode = 0xC0;
break;
case SDL_SCANCODE_LEFTBRACKET:
keyCode = 0xDB;
break;
case SDL_SCANCODE_BACKSLASH:
keyCode = 0xDC;
break;
case SDL_SCANCODE_RIGHTBRACKET:
keyCode = 0xDD;
break;
case SDL_SCANCODE_APOSTROPHE:
keyCode = 0xDE;
break;
case SDL_SCANCODE_NONUSBACKSLASH:
keyCode = 0xE2;
break;
default:
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Unhandled button event: %d",
event->keysym.scancode);
return;
}
}
// Track the key state so we always know which keys are down
if (event->state == SDL_PRESSED) {
m_KeysDown.insert(keyCode);
}
else {
m_KeysDown.remove(keyCode);
}
LiSendKeyboardEvent(keyCode,
event->state == SDL_PRESSED ?
KEY_ACTION_DOWN : KEY_ACTION_UP,
modifiers);
}
void SdlInputHandler::handleMouseButtonEvent(SDL_MouseButtonEvent* event)
{
int button;
// Capture the mouse again if clicked when unbound.
// We start capture on left button released instead of
// pressed to avoid sending an errant mouse button released
// event to the host when clicking into our window (since
// the pressed event was consumed by this code).
if (event->button == SDL_BUTTON_LEFT &&
event->state == SDL_RELEASED &&
!SDL_GetRelativeMouseMode()) {
SDL_SetRelativeMouseMode(SDL_TRUE);
return;
}
else if (!SDL_GetRelativeMouseMode()) {
// Not capturing
return;
}
else if (event->which == SDL_TOUCH_MOUSEID) {
// Ignore synthetic mouse events
return;
}
switch (event->button)
{
case SDL_BUTTON_LEFT:
button = BUTTON_LEFT;
break;
case SDL_BUTTON_MIDDLE:
button = BUTTON_MIDDLE;
break;
case SDL_BUTTON_RIGHT:
button = BUTTON_RIGHT;
break;
case SDL_BUTTON_X1:
button = BUTTON_X1;
break;
case SDL_BUTTON_X2:
button = BUTTON_X2;
break;
default:
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Unhandled button event: %d",
event->button);
return;
}
LiSendMouseButtonEvent(event->state == SDL_PRESSED ?
BUTTON_ACTION_PRESS :
BUTTON_ACTION_RELEASE,
button);
}
void SdlInputHandler::handleMouseMotionEvent(SDL_MouseMotionEvent* event)
{
if (!SDL_GetRelativeMouseMode()) {
// Not capturing
return;
}
else if (event->which == SDL_TOUCH_MOUSEID) {
// Ignore synthetic mouse events
return;
}
short xdelta = (short)event->xrel;
short ydelta = (short)event->yrel;
// If we're sending more than one motion event per millisecond,
// delay for 1 ms to allow batching of mouse move events. On older
// versions of GFE, we will unconditionally wait this 1 ms to
// work around an input processing issue that causes massive mouse latency.
Uint32 currentTime = SDL_GetTicks();
if (m_NeedsInputDelay || !SDL_TICKS_PASSED(currentTime, m_LastMouseMotionTime + 1)) {
SDL_Delay(1);
currentTime = SDL_GetTicks();
}
m_LastMouseMotionTime = currentTime;
// Pump even if we didn't delay since we might get some extra events
SDL_PumpEvents();
// Batch all of the pending mouse motion events
SDL_Event nextEvent;
while (SDL_PeepEvents(&nextEvent,
1,
SDL_GETEVENT,
SDL_MOUSEMOTION,
SDL_MOUSEMOTION) == 1) {
// In theory, these can overflow but in practice
// it should be highly unlikely since it would require
// moving 64K pixels in 1 ms.
xdelta += nextEvent.motion.xrel;
ydelta += nextEvent.motion.yrel;
}
if (xdelta != 0 || ydelta != 0) {
LiSendMouseMoveEvent(xdelta, ydelta);
}
}
void SdlInputHandler::handleMouseWheelEvent(SDL_MouseWheelEvent* event)
{
if (!SDL_GetRelativeMouseMode()) {
// Not capturing
return;
}
else if (event->which == SDL_TOUCH_MOUSEID) {
// Ignore synthetic mouse events
return;
}
if (event->y != 0) {
LiSendScrollEvent((signed char)event->y);
}
}
GamepadState*
SdlInputHandler::findStateForGamepad(SDL_JoystickID id)
{
int i;
for (i = 0; i < MAX_GAMEPADS; i++) {
if (m_GamepadState[i].jsId == id) {
SDL_assert(!m_MultiController || m_GamepadState[i].index == i);
return &m_GamepadState[i];
}
}
// This should only happen with > 4 gamepads
SDL_assert(SDL_NumJoysticks() > 4);
return nullptr;
}
void SdlInputHandler::sendGamepadState(GamepadState* state)
{
SDL_assert(m_GamepadMask == 0x1 || m_MultiController);
LiSendMultiControllerEvent(state->index,
m_GamepadMask,
state->buttons,
state->lt,
state->rt,
state->lsX,
state->lsY,
state->rsX,
state->rsY);
}
Uint32 SdlInputHandler::releaseLeftButtonTimerCallback(Uint32, void*)
{
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_LEFT);
return 0;
}
Uint32 SdlInputHandler::releaseRightButtonTimerCallback(Uint32, void*)
{
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_RIGHT);
return 0;
}
Uint32 SdlInputHandler::dragTimerCallback(Uint32, void *param)
{
auto me = reinterpret_cast<SdlInputHandler*>(param);
// Check how many fingers are down now to decide
// which button to hold down
if (me->m_NumFingersDown == 2) {
me->m_DragButton = BUTTON_RIGHT;
}
else if (me->m_NumFingersDown == 1) {
me->m_DragButton = BUTTON_LEFT;
}
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, me->m_DragButton);
return 0;
}
void SdlInputHandler::handleControllerAxisEvent(SDL_ControllerAxisEvent* event)
{
GamepadState* state = findStateForGamepad(event->which);
if (state == NULL) {
return;
}
switch (event->axis)
{
case SDL_CONTROLLER_AXIS_LEFTX:
state->lsX = event->value;
break;
case SDL_CONTROLLER_AXIS_LEFTY:
// Signed values have one more negative value than
// positive value, so inverting the sign on -32768
// could actually cause the value to overflow and
// wrap around to be negative again. Avoid that by
// capping the value at 32767.
state->lsY = -qMax(event->value, (short)-32767);
break;
case SDL_CONTROLLER_AXIS_RIGHTX:
state->rsX = event->value;
break;
case SDL_CONTROLLER_AXIS_RIGHTY:
state->rsY = -qMax(event->value, (short)-32767);
break;
case SDL_CONTROLLER_AXIS_TRIGGERLEFT:
state->lt = (unsigned char)(event->value * 255UL / 32767);
break;
case SDL_CONTROLLER_AXIS_TRIGGERRIGHT:
state->rt = (unsigned char)(event->value * 255UL / 32767);
break;
default:
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Unhandled controller axis: %d",
event->axis);
return;
}
sendGamepadState(state);
}
void SdlInputHandler::handleControllerButtonEvent(SDL_ControllerButtonEvent* event)
{
GamepadState* state = findStateForGamepad(event->which);
if (state == NULL) {
return;
}
if (event->state == SDL_PRESSED) {
state->buttons |= k_ButtonMap[event->button];
}
else {
state->buttons &= ~k_ButtonMap[event->button];
}
// Handle Start+Select+L1+R1 as a gamepad quit combo
if (state->buttons == (PLAY_FLAG | BACK_FLAG | LB_FLAG | RB_FLAG)) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Detected quit gamepad button combo");
// Push a quit event to the main loop
SDL_Event event;
event.type = SDL_QUIT;
event.quit.timestamp = SDL_GetTicks();
SDL_PushEvent(&event);
// Clear buttons down on this gameapd
LiSendMultiControllerEvent(state->index, m_GamepadMask,
0, 0, 0, 0, 0, 0, 0);
return;
}
sendGamepadState(state);
}
void SdlInputHandler::handleControllerDeviceEvent(SDL_ControllerDeviceEvent* event)
{
GamepadState* state;
if (event->type == SDL_CONTROLLERDEVICEADDED) {
int i;
const char* name;
for (i = 0; i < MAX_GAMEPADS; i++) {
if (m_GamepadState[i].controller == NULL) {
// Found an empty slot
break;
}
}
if (i == MAX_GAMEPADS) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"No open gamepad slots found!");
return;
}
state = &m_GamepadState[i];
if (m_MultiController) {
state->index = i;
}
else {
// Always player 1 in single controller mode
state->index = 0;
}
state->controller = SDL_GameControllerOpen(event->which);
if (state->controller == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to open gamepad: %s",
SDL_GetError());
return;
}
state->jsId = SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(state->controller));
name = SDL_GameControllerName(state->controller);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Gamepad %d (player %d) is: %s",
i,
state->index,
name != NULL ? name : "<null>");
// Add this gamepad to the gamepad mask
if (m_MultiController) {
SDL_assert(!(m_GamepadMask & (1 << state->index)));
m_GamepadMask |= (1 << state->index);
}
else {
SDL_assert(m_GamepadMask == 0x1);
}
// Send an empty event to tell the PC we've arrived
sendGamepadState(state);
}
else if (event->type == SDL_CONTROLLERDEVICEREMOVED) {
state = findStateForGamepad(event->which);
if (state != NULL) {
SDL_GameControllerClose(state->controller);
// Remove this from the gamepad mask in MC-mode
if (m_MultiController) {
SDL_assert(m_GamepadMask & (1 << state->index));
m_GamepadMask &= ~(1 << state->index);
}
else {
SDL_assert(m_GamepadMask == 0x1);
}
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Gamepad %d is gone",
state->index);
// Send a final event to let the PC know this gamepad is gone
LiSendMultiControllerEvent(state->index, m_GamepadMask,
0, 0, 0, 0, 0, 0, 0);
// Clear all remaining state from this slot
SDL_memset(state, 0, sizeof(*state));
}
}
}
void SdlInputHandler::handleJoystickArrivalEvent(SDL_JoyDeviceEvent* event)
{
SDL_assert(event->type == SDL_JOYDEVICEADDED);
if (!SDL_IsGameController(event->which)) {
char guidStr[33];
SDL_JoystickGetGUIDString(SDL_JoystickGetDeviceGUID(event->which),
guidStr, sizeof(guidStr));
const char* name = SDL_JoystickNameForIndex(event->which);
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Joystick discovered with no mapping: %s %s",
name ? name : "<UNKNOWN>",
guidStr);
SDL_Joystick* joy = SDL_JoystickOpen(event->which);
if (joy != nullptr) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Number of axes: %d | Number of buttons: %d | Number of hats: %d",
SDL_JoystickNumAxes(joy), SDL_JoystickNumButtons(joy),
SDL_JoystickNumHats(joy));
SDL_JoystickClose(joy);
}
else {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Unable to open joystick for query: %s",
SDL_GetError());
}
}
}
void SdlInputHandler::handleTouchFingerEvent(SDL_TouchFingerEvent* event)
{
int fingerIndex = -1;
// Observations on Windows 10: x and y appear to be relative to 0,0 of the window client area.
// Although SDL documentation states they are 0.0 - 1.0 float values, they can actually be higher
// or lower than those values as touch events continue for touches started within the client area that
// leave the client area during a drag motion.
// dx and dy are deltas from the last touch event, not the first touch down.
// Determine the index of this finger using our list
// of fingers that are currently active on screen.
// This is also required to handle finger up which
// where the finger will not be in SDL_GetTouchFinger()
// anymore.
if (event->type != SDL_FINGERDOWN) {
for (int i = 0; i < MAX_FINGERS; i++) {
if (event->fingerId == m_TouchDownEvent[i].fingerId) {
fingerIndex = i;
break;
}
}
}
else {
// Resolve the new finger by determining the ID of each
// finger on the display.
int numTouchFingers = SDL_GetNumTouchFingers(event->touchId);
for (int i = 0; i < numTouchFingers; i++) {
SDL_Finger* finger = SDL_GetTouchFinger(event->touchId, i);
SDL_assert(finger != nullptr);
if (finger != nullptr) {
if (finger->id == event->fingerId) {
fingerIndex = i;
break;
}
}
}
}
if (fingerIndex < 0 || fingerIndex >= MAX_FINGERS) {
// Too many fingers
return;
}
// Handle cursor motion based on the position of the
// primary finger on screen
if (fingerIndex == 0) {
// The event x and y values are relative to our window width
// and height. However, we want to scale them to be relative
// to the host resolution. Fortunately this is easy since we
// already have normalized values. We'll just multiply them
// by the stream dimensions to get real X and Y values rather
// than the client window dimensions.
short deltaX = static_cast<short>(event->dx * m_StreamWidth);
short deltaY = static_cast<short>(event->dy * m_StreamHeight);
if (deltaX != 0 || deltaY != 0) {
LiSendMouseMoveEvent(deltaX, deltaY);
}
}
// Start a drag timer when primary or secondary
// fingers go down
if (event->type == SDL_FINGERDOWN &&
(fingerIndex == 0 || fingerIndex == 1)) {
SDL_RemoveTimer(m_DragTimer);
m_DragTimer = SDL_AddTimer(DRAG_ACTIVATION_DELAY,
dragTimerCallback,
this);
}
if (event->type == SDL_FINGERMOTION) {
// Count the total cumulative dx/dy that the finger
// has moved.
m_CumulativeDelta[fingerIndex] += qAbs(event->x);
m_CumulativeDelta[fingerIndex] += qAbs(event->y);
// If it's outside the deadzone delta, cancel drags and taps
if (m_CumulativeDelta[fingerIndex] > DEAD_ZONE_DELTA) {
SDL_RemoveTimer(m_DragTimer);
m_DragTimer = 0;
// This effectively cancels the tap logic below
m_TouchDownEvent[fingerIndex].timestamp = 0;
}
}
if (event->type == SDL_FINGERUP) {
// Cancel the drag timer on finger up
SDL_RemoveTimer(m_DragTimer);
m_DragTimer = 0;
// Release any drag
if (m_DragButton != 0) {
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, m_DragButton);
m_DragButton = 0;
}
// 2 finger tap
else if (event->timestamp - m_TouchDownEvent[1].timestamp < 250) {
// Zero timestamp of the primary finger to ensure we won't
// generate a left click if the primary finger comes up soon.
m_TouchDownEvent[0].timestamp = 0;
// Press down the right mouse button
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, BUTTON_RIGHT);
// Queue a timer to release it in 100 ms
SDL_RemoveTimer(m_RightButtonReleaseTimer);
m_RightButtonReleaseTimer = SDL_AddTimer(TAP_BUTTON_RELEASE_DELAY,
releaseRightButtonTimerCallback,
nullptr);
}
// 1 finger tap
else if (event->timestamp - m_TouchDownEvent[0].timestamp < 250) {
// Press down the left mouse button
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, BUTTON_LEFT);
// Queue a timer to release it in 100 ms
SDL_RemoveTimer(m_LeftButtonReleaseTimer);
m_LeftButtonReleaseTimer = SDL_AddTimer(TAP_BUTTON_RELEASE_DELAY,
releaseLeftButtonTimerCallback,
nullptr);
}
}
m_NumFingersDown = SDL_GetNumTouchFingers(event->touchId);
if (event->type == SDL_FINGERDOWN) {
m_TouchDownEvent[fingerIndex] = *event;
m_CumulativeDelta[fingerIndex] = 0;
}
else if (event->type == SDL_FINGERUP) {
m_TouchDownEvent[fingerIndex] = {};
}
}
int SdlInputHandler::getAttachedGamepadMask()
{
int count;
int mask;
if (!m_MultiController) {
// Player 1 is always present in non-MC mode
return 0x1;
}
count = mask = 0;
for (int i = 0; i < SDL_NumJoysticks(); i++) {
if (SDL_IsGameController(i)) {
mask |= (1 << count++);
}
}
return mask;
}
void SdlInputHandler::raiseAllKeys()
{
if (m_KeysDown.isEmpty()) {
return;
}
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Raising %d keys",
m_KeysDown.count());
for (auto keyDown : m_KeysDown) {
LiSendKeyboardEvent(keyDown, KEY_ACTION_UP, 0);
}
m_KeysDown.clear();
}
QString SdlInputHandler::getUnmappedGamepads()
{
QString ret;
if (SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER) failed: %s",
SDL_GetError());
}
MappingManager mappingManager;
mappingManager.applyMappings();
for (int i = 0; i < SDL_NumJoysticks(); i++) {
if (!SDL_IsGameController(i)) {
char guidStr[33];
SDL_JoystickGetGUIDString(SDL_JoystickGetDeviceGUID(i),
guidStr, sizeof(guidStr));
const char* name = SDL_JoystickNameForIndex(i);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Unmapped joystick: %s %s",
name ? name : "<UNKNOWN>",
guidStr);
SDL_Joystick* joy = SDL_JoystickOpen(i);
if (joy != nullptr) {
int numButtons = SDL_JoystickNumButtons(joy);
int numHats = SDL_JoystickNumHats(joy);
int numAxes = SDL_JoystickNumAxes(joy);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Number of axes: %d | Number of buttons: %d | Number of hats: %d",
numAxes, numButtons, numHats);
if (numAxes >= 4 && numButtons >= 8 && numHats <= 1) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Joystick likely to be an unmapped game controller");
if (!ret.isEmpty()) {
ret += ", ";
}
ret += name;
}
SDL_JoystickClose(joy);
}
else {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Unable to open joystick for query: %s",
SDL_GetError());
}
}
}
SDL_QuitSubSystem(SDL_INIT_GAMECONTROLLER);
return ret;
}
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