moonlight-qt/app/streaming/input/gamepad.cpp
2020-12-25 22:21:20 -06:00

612 lines
22 KiB
C++

#include "streaming/session.h"
#include <Limelight.h>
#include <SDL.h>
#include "settings/mappingmanager.h"
#include <QtMath>
// How long the Start button must be pressed to toggle mouse emulation
#define MOUSE_EMULATION_LONG_PRESS_TIME 750
// How long between polling the gamepad to send virtual mouse input
#define MOUSE_EMULATION_POLLING_INTERVAL 50
// Determines how fast the mouse will move each interval
#define MOUSE_EMULATION_MOTION_MULTIPLIER 4
// Determines the maximum motion amount before allowing movement
#define MOUSE_EMULATION_DEADZONE 2
// Haptic capabilities (in addition to those from SDL_HapticQuery())
#define ML_HAPTIC_GC_RUMBLE (1U << 16)
#define ML_HAPTIC_SIMPLE_RUMBLE (1U << 17)
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
};
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::mouseEmulationTimerCallback(Uint32 interval, void *param)
{
auto gamepad = reinterpret_cast<GamepadState*>(param);
short rawX;
short rawY;
// Determine which analog stick is currently receiving the strongest input
if ((uint32_t)qAbs(gamepad->lsX) + qAbs(gamepad->lsY) > (uint32_t)qAbs(gamepad->rsX) + qAbs(gamepad->rsY)) {
rawX = gamepad->lsX;
rawY = -gamepad->lsY;
}
else {
rawX = gamepad->rsX;
rawY = -gamepad->rsY;
}
float deltaX;
float deltaY;
// Produce a base vector for mouse movement with increased speed as we deviate further from center
deltaX = qPow(rawX / 32766.0f * MOUSE_EMULATION_MOTION_MULTIPLIER, 3);
deltaY = qPow(rawY / 32766.0f * MOUSE_EMULATION_MOTION_MULTIPLIER, 3);
// Enforce deadzones
deltaX = qAbs(deltaX) > MOUSE_EMULATION_DEADZONE ? deltaX - MOUSE_EMULATION_DEADZONE : 0;
deltaY = qAbs(deltaY) > MOUSE_EMULATION_DEADZONE ? deltaY - MOUSE_EMULATION_DEADZONE : 0;
if (deltaX != 0 || deltaY != 0) {
LiSendMouseMoveEvent((short)deltaX, (short)deltaY);
}
return interval;
}
void SdlInputHandler::handleControllerAxisEvent(SDL_ControllerAxisEvent* event)
{
SDL_JoystickID gameControllerId = event->which;
GamepadState* state = findStateForGamepad(gameControllerId);
if (state == NULL) {
return;
}
// Batch all pending axis motion events for this gamepad to save CPU time
SDL_Event nextEvent;
for (;;) {
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;
}
// Check for another event to batch with
if (SDL_PeepEvents(&nextEvent, 1, SDL_PEEKEVENT, SDL_CONTROLLERAXISMOTION, SDL_CONTROLLERAXISMOTION) <= 0) {
break;
}
event = &nextEvent.caxis;
if (event->which != gameControllerId) {
// Stop batching if a different gamepad interrupts us
break;
}
// Remove the next event to batch
SDL_PeepEvents(&nextEvent, 1, SDL_GETEVENT, SDL_CONTROLLERAXISMOTION, SDL_CONTROLLERAXISMOTION);
}
// Only send the gamepad state to the host if it's not in mouse emulation mode
if (state->mouseEmulationTimer == 0) {
sendGamepadState(state);
}
}
void SdlInputHandler::handleControllerButtonEvent(SDL_ControllerButtonEvent* event)
{
GamepadState* state = findStateForGamepad(event->which);
if (state == NULL) {
return;
}
if (m_SwapFaceButtons) {
switch (event->button) {
case SDL_CONTROLLER_BUTTON_A:
event->button = SDL_CONTROLLER_BUTTON_B;
break;
case SDL_CONTROLLER_BUTTON_B:
event->button = SDL_CONTROLLER_BUTTON_A;
break;
case SDL_CONTROLLER_BUTTON_X:
event->button = SDL_CONTROLLER_BUTTON_Y;
break;
case SDL_CONTROLLER_BUTTON_Y:
event->button = SDL_CONTROLLER_BUTTON_X;
break;
}
}
if (event->state == SDL_PRESSED) {
state->buttons |= k_ButtonMap[event->button];
if (event->button == SDL_CONTROLLER_BUTTON_START) {
state->lastStartDownTime = SDL_GetTicks();
}
else if (state->mouseEmulationTimer != 0) {
if (event->button == SDL_CONTROLLER_BUTTON_A) {
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, BUTTON_LEFT);
}
else if (event->button == SDL_CONTROLLER_BUTTON_B) {
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, BUTTON_RIGHT);
}
else if (event->button == SDL_CONTROLLER_BUTTON_X) {
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, BUTTON_MIDDLE);
}
else if (event->button == SDL_CONTROLLER_BUTTON_LEFTSHOULDER) {
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, BUTTON_X1);
}
else if (event->button == SDL_CONTROLLER_BUTTON_RIGHTSHOULDER) {
LiSendMouseButtonEvent(BUTTON_ACTION_PRESS, BUTTON_X2);
}
else if (event->button == SDL_CONTROLLER_BUTTON_DPAD_UP) {
LiSendScrollEvent(1);
}
else if (event->button == SDL_CONTROLLER_BUTTON_DPAD_DOWN) {
LiSendScrollEvent(-1);
}
}
}
else {
state->buttons &= ~k_ButtonMap[event->button];
if (event->button == SDL_CONTROLLER_BUTTON_START) {
if (SDL_GetTicks() - state->lastStartDownTime > MOUSE_EMULATION_LONG_PRESS_TIME) {
if (state->mouseEmulationTimer != 0) {
SDL_RemoveTimer(state->mouseEmulationTimer);
state->mouseEmulationTimer = 0;
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Mouse emulation deactivated");
Session::get()->notifyMouseEmulationMode(false);
}
else if (m_GamepadMouse) {
// Send the start button up event to the host, since we won't do it below
sendGamepadState(state);
state->mouseEmulationTimer = SDL_AddTimer(MOUSE_EMULATION_POLLING_INTERVAL, SdlInputHandler::mouseEmulationTimerCallback, state);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Mouse emulation active");
Session::get()->notifyMouseEmulationMode(true);
}
}
}
else if (state->mouseEmulationTimer != 0) {
if (event->button == SDL_CONTROLLER_BUTTON_A) {
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_LEFT);
}
else if (event->button == SDL_CONTROLLER_BUTTON_B) {
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_RIGHT);
}
else if (event->button == SDL_CONTROLLER_BUTTON_X) {
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_MIDDLE);
}
else if (event->button == SDL_CONTROLLER_BUTTON_LEFTSHOULDER) {
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_X1);
}
else if (event->button == SDL_CONTROLLER_BUTTON_RIGHTSHOULDER) {
LiSendMouseButtonEvent(BUTTON_ACTION_RELEASE, BUTTON_X2);
}
}
}
// 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;
}
// Only send the gamepad state to the host if it's not in mouse emulation mode
if (state->mouseEmulationTimer == 0) {
sendGamepadState(state);
}
}
void SdlInputHandler::handleControllerDeviceEvent(SDL_ControllerDeviceEvent* event)
{
GamepadState* state;
if (event->type == SDL_CONTROLLERDEVICEADDED) {
int i;
const char* name;
SDL_GameController* controller;
const char* mapping;
char guidStr[33];
uint32_t hapticCaps;
controller = SDL_GameControllerOpen(event->which);
if (controller == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to open gamepad: %s",
SDL_GetError());
return;
}
// We used to use SDL_GameControllerGetPlayerIndex() here but that
// can lead to strange issues due to bugs in Windows where an Xbox
// controller will join as player 2, even though no player 1 controller
// is connected at all. This pretty much screws any attempt to use
// the gamepad in single player games, so just assign them in order from 0.
i = 0;
for (; i < MAX_GAMEPADS; i++) {
SDL_assert(m_GamepadState[i].controller != controller);
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!");
SDL_GameControllerClose(controller);
return;
}
state = &m_GamepadState[i];
if (m_MultiController) {
state->index = i;
#if SDL_VERSION_ATLEAST(2, 0, 12)
// This will change indicators on the controller to show the assigned
// player index. For Xbox 360 controllers, that means updating the LED
// ring to light up the corresponding quadrant for this player.
SDL_GameControllerSetPlayerIndex(controller, state->index);
#endif
}
else {
// Always player 1 in single controller mode
state->index = 0;
}
state->controller = controller;
state->jsId = SDL_JoystickInstanceID(SDL_GameControllerGetJoystick(state->controller));
#if SDL_VERSION_ATLEAST(2, 0, 9)
// Perform a tiny rumble to see if haptics are supported.
// NB: We cannot use zeros for rumble intensity or SDL will not actually call the JS driver
// and we'll get a (potentially false) success value returned.
hapticCaps = SDL_GameControllerRumble(controller, 1, 1, 1) == 0 ?
ML_HAPTIC_GC_RUMBLE : 0;
#else
state->haptic = SDL_HapticOpenFromJoystick(SDL_GameControllerGetJoystick(state->controller));
state->hapticEffectId = -1;
state->hapticMethod = GAMEPAD_HAPTIC_METHOD_NONE;
if (state->haptic != nullptr) {
// Query for supported haptic effects
hapticCaps = SDL_HapticQuery(state->haptic);
hapticCaps |= SDL_HapticRumbleSupported(state->haptic) ?
ML_HAPTIC_SIMPLE_RUMBLE : 0;
if ((SDL_HapticQuery(state->haptic) & SDL_HAPTIC_LEFTRIGHT) == 0) {
if (SDL_HapticRumbleSupported(state->haptic)) {
if (SDL_HapticRumbleInit(state->haptic) == 0) {
state->hapticMethod = GAMEPAD_HAPTIC_METHOD_SIMPLERUMBLE;
}
}
if (state->hapticMethod == GAMEPAD_HAPTIC_METHOD_NONE) {
SDL_HapticClose(state->haptic);
state->haptic = nullptr;
}
} else {
state->hapticMethod = GAMEPAD_HAPTIC_METHOD_LEFTRIGHT;
}
}
else {
hapticCaps = 0;
}
#endif
SDL_JoystickGetGUIDString(SDL_JoystickGetGUID(SDL_GameControllerGetJoystick(state->controller)),
guidStr, sizeof(guidStr));
mapping = SDL_GameControllerMapping(state->controller);
name = SDL_GameControllerName(state->controller);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Gamepad %d (player %d) is: %s (haptic capabilities: 0x%x) (mapping: %s -> %s)",
i,
state->index,
name != nullptr ? name : "<null>",
hapticCaps,
guidStr,
mapping != nullptr ? mapping : "<null>");
if (mapping != nullptr) {
SDL_free((void*)mapping);
}
// Add this gamepad to the gamepad mask
if (m_MultiController) {
// NB: Don't assert that it's unset here because we will already
// have the mask set for initially attached gamepads to avoid confusing
// apps running on the host.
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) {
if (state->mouseEmulationTimer != 0) {
Session::get()->notifyMouseEmulationMode(false);
SDL_RemoveTimer(state->mouseEmulationTimer);
}
SDL_GameControllerClose(state->controller);
#if !SDL_VERSION_ATLEAST(2, 0, 9)
if (state->haptic != nullptr) {
SDL_HapticClose(state->haptic);
}
#endif
// 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::rumble(unsigned short controllerNumber, unsigned short lowFreqMotor, unsigned short highFreqMotor)
{
// Make sure the controller number is within our supported count
if (controllerNumber >= MAX_GAMEPADS) {
return;
}
#if SDL_VERSION_ATLEAST(2, 0, 9)
if (m_GamepadState[controllerNumber].controller != nullptr) {
SDL_GameControllerRumble(m_GamepadState[controllerNumber].controller, lowFreqMotor, highFreqMotor, 30000);
}
#else
// Check if the controller supports haptics (and if the controller exists at all)
SDL_Haptic* haptic = m_GamepadState[controllerNumber].haptic;
if (haptic == nullptr) {
return;
}
// Stop the last effect we played
if (m_GamepadState[controllerNumber].hapticMethod == GAMEPAD_HAPTIC_METHOD_LEFTRIGHT) {
if (m_GamepadState[controllerNumber].hapticEffectId >= 0) {
SDL_HapticDestroyEffect(haptic, m_GamepadState[controllerNumber].hapticEffectId);
}
} else if (m_GamepadState[controllerNumber].hapticMethod == GAMEPAD_HAPTIC_METHOD_SIMPLERUMBLE) {
SDL_HapticRumbleStop(haptic);
}
// If this callback is telling us to stop both motors, don't bother queuing a new effect
if (lowFreqMotor == 0 && highFreqMotor == 0) {
return;
}
if (m_GamepadState[controllerNumber].hapticMethod == GAMEPAD_HAPTIC_METHOD_LEFTRIGHT) {
SDL_HapticEffect effect;
SDL_memset(&effect, 0, sizeof(effect));
effect.type = SDL_HAPTIC_LEFTRIGHT;
// The effect should last until we are instructed to stop or change it
effect.leftright.length = SDL_HAPTIC_INFINITY;
// SDL haptics range from 0-32767 but XInput uses 0-65535, so divide by 2 to correct for SDL's scaling
effect.leftright.large_magnitude = lowFreqMotor / 2;
effect.leftright.small_magnitude = highFreqMotor / 2;
// Play the new effect
m_GamepadState[controllerNumber].hapticEffectId = SDL_HapticNewEffect(haptic, &effect);
if (m_GamepadState[controllerNumber].hapticEffectId >= 0) {
SDL_HapticRunEffect(haptic, m_GamepadState[controllerNumber].hapticEffectId, 1);
}
} else if (m_GamepadState[controllerNumber].hapticMethod == GAMEPAD_HAPTIC_METHOD_SIMPLERUMBLE) {
SDL_HapticRumblePlay(haptic,
std::min(1.0, (GAMEPAD_HAPTIC_SIMPLE_HIFREQ_MOTOR_WEIGHT*highFreqMotor +
GAMEPAD_HAPTIC_SIMPLE_LOWFREQ_MOTOR_WEIGHT*lowFreqMotor) / 65535.0),
SDL_HAPTIC_INFINITY);
}
#endif
}
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 && numAxes <= 8) && 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;
}
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;
}