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Merge pull request #4257 from jroweboy/sdl-globals 

Input: Remove global variables from SDL Input
This commit is contained in:
Weiyi Wang 2018-09-29 23:00:12 -04:00 committed by GitHub
parent f5a3ec18c2 3f4a7f8f58
commit fbc36ff63c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 773 additions and 690 deletions
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17
src/citra/emu_window/emu_window_sdl2.cpp
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@ -81,17 +81,17 @@ void EmuWindow_SDL2::Fullscreen() {
} }
EmuWindow_SDL2::EmuWindow_SDL2(bool fullscreen) { EmuWindow_SDL2::EmuWindow_SDL2(bool fullscreen) {
InputCommon::Init();
Network::Init();
SDL_SetMainReady();
// Initialize the window // Initialize the window
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) { if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
LOG_CRITICAL(Frontend, "Failed to initialize SDL2! Exiting..."); LOG_CRITICAL(Frontend, "Failed to initialize SDL2! Exiting...");
exit(1); exit(1);
} }
InputCommon::Init();
Network::Init();
SDL_SetMainReady();
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3); SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3); SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE); SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
@ -143,12 +143,10 @@ EmuWindow_SDL2::EmuWindow_SDL2(bool fullscreen) {
} }
EmuWindow_SDL2::~EmuWindow_SDL2() { EmuWindow_SDL2::~EmuWindow_SDL2() {
InputCommon::SDL::CloseSDLJoysticks();
SDL_GL_DeleteContext(gl_context);
SDL_Quit();
Network::Shutdown(); Network::Shutdown();
InputCommon::Shutdown(); InputCommon::Shutdown();
SDL_GL_DeleteContext(gl_context);
SDL_Quit();
} }
void EmuWindow_SDL2::SwapBuffers() { void EmuWindow_SDL2::SwapBuffers() {
@ -190,7 +188,6 @@ void EmuWindow_SDL2::PollEvents() {
is_open = false; is_open = false;
break; break;
default: default:
InputCommon::SDL::HandleGameControllerEvent(event);
break; break;
} }
} }

1
src/citra_qt/bootmanager.cpp
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@ -114,7 +114,6 @@ GRenderWindow::GRenderWindow(QWidget* parent, EmuThread* emu_thread)
setWindowTitle(QString::fromStdString(window_title)); setWindowTitle(QString::fromStdString(window_title));
InputCommon::Init(); InputCommon::Init();
InputCommon::StartJoystickEventHandler();
} }
GRenderWindow::~GRenderWindow() { GRenderWindow::~GRenderWindow() {

14
src/input_common/CMakeLists.txt
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@ -7,20 +7,24 @@ add_library(input_common STATIC
main.h main.h
motion_emu.cpp motion_emu.cpp
motion_emu.h motion_emu.h
sdl/sdl.cpp
sdl/sdl.h
udp/client.cpp udp/client.cpp
udp/client.h udp/client.h
udp/protocol.cpp udp/protocol.cpp
udp/protocol.h udp/protocol.h
udp/udp.cpp udp/udp.cpp
udp/udp.h udp/udp.h
$<$<BOOL:${SDL2_FOUND}>:sdl/sdl.cpp sdl/sdl.h>
) )
create_target_directory_groups(input_common)
target_link_libraries(input_common PUBLIC core PRIVATE common ${Boost_LIBRARIES})
if(SDL2_FOUND) if(SDL2_FOUND)
target_sources(input_common PRIVATE
sdl/sdl_impl.cpp
sdl/sdl_impl.h
)
target_link_libraries(input_common PRIVATE SDL2) target_link_libraries(input_common PRIVATE SDL2)
target_compile_definitions(input_common PRIVATE HAVE_SDL2) target_compile_definitions(input_common PRIVATE HAVE_SDL2)
endif() endif()
create_target_directory_groups(input_common)
target_link_libraries(input_common PUBLIC core PRIVATE common ${Boost_LIBRARIES})

24
src/input_common/main.cpp
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@ -19,10 +19,7 @@ namespace InputCommon {
static std::shared_ptr<Keyboard> keyboard; static std::shared_ptr<Keyboard> keyboard;
static std::shared_ptr<MotionEmu> motion_emu; static std::shared_ptr<MotionEmu> motion_emu;
static std::unique_ptr<CemuhookUDP::State> udp; static std::unique_ptr<CemuhookUDP::State> udp;
static std::unique_ptr<SDL::State> sdl;
#ifdef HAVE_SDL2
static std::thread poll_thread;
#endif
void Init() { void Init() {
keyboard = std::make_shared<Keyboard>(); keyboard = std::make_shared<Keyboard>();
@ -32,30 +29,19 @@ void Init() {
motion_emu = std::make_shared<MotionEmu>(); motion_emu = std::make_shared<MotionEmu>();
Input::RegisterFactory<Input::MotionDevice>("motion_emu", motion_emu); Input::RegisterFactory<Input::MotionDevice>("motion_emu", motion_emu);
#ifdef HAVE_SDL2 sdl = SDL::Init();
SDL::Init();
#endif
udp = CemuhookUDP::Init(); udp = CemuhookUDP::Init();
} }
void StartJoystickEventHandler() {
#ifdef HAVE_SDL2
poll_thread = std::thread(SDL::PollLoop);
#endif
}
void Shutdown() { void Shutdown() {
Input::UnregisterFactory<Input::ButtonDevice>("keyboard"); Input::UnregisterFactory<Input::ButtonDevice>("keyboard");
keyboard.reset(); keyboard.reset();
Input::UnregisterFactory<Input::AnalogDevice>("analog_from_button"); Input::UnregisterFactory<Input::AnalogDevice>("analog_from_button");
Input::UnregisterFactory<Input::MotionDevice>("motion_emu"); Input::UnregisterFactory<Input::MotionDevice>("motion_emu");
motion_emu.reset(); motion_emu.reset();
sdl.reset();
#ifdef HAVE_SDL2 udp.reset();
SDL::Shutdown();
poll_thread.join();
#endif
} }
Keyboard* GetKeyboard() { Keyboard* GetKeyboard() {
@ -99,7 +85,7 @@ std::vector<std::unique_ptr<DevicePoller>> GetPollers(DeviceType type) {
std::vector<std::unique_ptr<DevicePoller>> pollers; std::vector<std::unique_ptr<DevicePoller>> pollers;
#ifdef HAVE_SDL2 #ifdef HAVE_SDL2
SDL::Polling::GetPollers(type, pollers); sdl->GetPollers(type, pollers);
#endif #endif
return pollers; return pollers;

2
src/input_common/main.h
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@ -20,8 +20,6 @@ void Init();
/// Deregisters all built-in input device factories and shuts them down. /// Deregisters all built-in input device factories and shuts them down.
void Shutdown(); void Shutdown();
void StartJoystickEventHandler();
class Keyboard; class Keyboard;
/// Gets the keyboard button device factory. /// Gets the keyboard button device factory.

634
src/input_common/sdl/sdl.cpp
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@ -1,629 +1,19 @@
// Copyright 2017 Citra Emulator Project // Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version // Licensed under GPLv2 or any later version
// Refer to the license.txt file included. // Refer to the license.txt file included.
#include <algorithm>
#include <atomic>
#include <cmath>
#include <functional>
#include <iterator>
#include <mutex>
#include <string>
#include <thread>
#include <tuple>
#include <unordered_map>
#include <utility>
#include <vector>
#include <SDL.h>
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/math_util.h"
#include "common/param_package.h"
#include "common/threadsafe_queue.h"
#include "input_common/main.h"
#include "input_common/sdl/sdl.h" #include "input_common/sdl/sdl.h"
#ifdef HAVE_SDL2
#include "input_common/sdl/sdl_impl.h"
#endif
namespace InputCommon { namespace InputCommon::SDL {
namespace SDL { std::unique_ptr<State> Init() {
#ifdef HAVE_SDL2
class SDLJoystick; return std::make_unique<SDLState>();
class SDLButtonFactory; #else
class SDLAnalogFactory; return std::make_unique<NullState>();
#endif
/// Map of GUID of a list of corresponding virtual Joysticks
static std::unordered_map<std::string, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
static std::mutex joystick_map_mutex;
static std::shared_ptr<SDLButtonFactory> button_factory;
static std::shared_ptr<SDLAnalogFactory> analog_factory;
/// Used by the Pollers during config
static std::atomic<bool> polling;
static Common::SPSCQueue<SDL_Event> event_queue;
static std::atomic<bool> initialized = false;
static std::string GetGUID(SDL_Joystick* joystick) {
SDL_JoystickGUID guid = SDL_JoystickGetGUID(joystick);
char guid_str[33];
SDL_JoystickGetGUIDString(guid, guid_str, sizeof(guid_str));
return guid_str;
} }
} // namespace InputCommon::SDL
class SDLJoystick {
public:
SDLJoystick(std::string guid_, int port_, SDL_Joystick* joystick,
decltype(&SDL_JoystickClose) deleter = &SDL_JoystickClose)
: guid{std::move(guid_)}, port{port_}, sdl_joystick{joystick, deleter} {}
void SetButton(int button, bool value) {
std::lock_guard<std::mutex> lock(mutex);
state.buttons[button] = value;
}
bool GetButton(int button) const {
std::lock_guard<std::mutex> lock(mutex);
return state.buttons.at(button);
}
void SetAxis(int axis, Sint16 value) {
std::lock_guard<std::mutex> lock(mutex);
state.axes[axis] = value;
}
float GetAxis(int axis) const {
std::lock_guard<std::mutex> lock(mutex);
return state.axes.at(axis) / 32767.0f;
}
std::tuple<float, float> GetAnalog(int axis_x, int axis_y) const {
float x = GetAxis(axis_x);
float y = GetAxis(axis_y);
y = -y; // 3DS uses an y-axis inverse from SDL
// Make sure the coordinates are in the unit circle,
// otherwise normalize it.
float r = x * x + y * y;
if (r > 1.0f) {
r = std::sqrt(r);
x /= r;
y /= r;
}
return std::make_tuple(x, y);
}
void SetHat(int hat, Uint8 direction) {
std::lock_guard<std::mutex> lock(mutex);
state.hats[hat] = direction;
}
bool GetHatDirection(int hat, Uint8 direction) const {
std::lock_guard<std::mutex> lock(mutex);
return (state.hats.at(hat) & direction) != 0;
}
/**
* The guid of the joystick
*/
const std::string& GetGUID() const {
return guid;
}
/**
* The number of joystick from the same type that were connected before this joystick
*/
int GetPort() const {
return port;
}
SDL_Joystick* GetSDLJoystick() const {
return sdl_joystick.get();
}
void SetSDLJoystick(SDL_Joystick* joystick,
decltype(&SDL_JoystickClose) deleter = &SDL_JoystickClose) {
sdl_joystick =
std::unique_ptr<SDL_Joystick, decltype(&SDL_JoystickClose)>(joystick, deleter);
}
private:
struct State {
std::unordered_map<int, bool> buttons;
std::unordered_map<int, Sint16> axes;
std::unordered_map<int, Uint8> hats;
} state;
std::string guid;
int port;
std::unique_ptr<SDL_Joystick, decltype(&SDL_JoystickClose)> sdl_joystick;
mutable std::mutex mutex;
};
/**
* Get the nth joystick with the corresponding GUID
*/
static std::shared_ptr<SDLJoystick> GetSDLJoystickByGUID(const std::string& guid, int port) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
const auto it = joystick_map.find(guid);
if (it != joystick_map.end()) {
while (it->second.size() <= port) {
auto joystick = std::make_shared<SDLJoystick>(guid, it->second.size(), nullptr,
[](SDL_Joystick*) {});
it->second.emplace_back(std::move(joystick));
}
return it->second[port];
}
auto joystick = std::make_shared<SDLJoystick>(guid, 0, nullptr, [](SDL_Joystick*) {});
return joystick_map[guid].emplace_back(std::move(joystick));
}
/**
* Check how many identical joysticks (by guid) were connected before the one with sdl_id and so tie
* it to a SDLJoystick with the same guid and that port
*/
static std::shared_ptr<SDLJoystick> GetSDLJoystickBySDLID(SDL_JoystickID sdl_id) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
auto sdl_joystick = SDL_JoystickFromInstanceID(sdl_id);
const std::string guid = GetGUID(sdl_joystick);
auto map_it = joystick_map.find(guid);
if (map_it != joystick_map.end()) {
auto vec_it = std::find_if(map_it->second.begin(), map_it->second.end(),
[&sdl_joystick](const std::shared_ptr<SDLJoystick>& joystick) {
return sdl_joystick == joystick->GetSDLJoystick();
});
if (vec_it != map_it->second.end()) {
// This is the common case: There is already an existing SDL_Joystick maped to a
// SDLJoystick. return the SDLJoystick
return *vec_it;
}
// Search for a SDLJoystick without a mapped SDL_Joystick...
auto nullptr_it = std::find_if(map_it->second.begin(), map_it->second.end(),
[](const std::shared_ptr<SDLJoystick>& joystick) {
return !joystick->GetSDLJoystick();
});
if (nullptr_it != map_it->second.end()) {
// ... and map it
(*nullptr_it)->SetSDLJoystick(sdl_joystick);
return *nullptr_it;
}
// There is no SDLJoystick without a mapped SDL_Joystick
// Create a new SDLJoystick
auto joystick = std::make_shared<SDLJoystick>(guid, map_it->second.size(), sdl_joystick);
return map_it->second.emplace_back(std::move(joystick));
}
auto joystick = std::make_shared<SDLJoystick>(guid, 0, sdl_joystick);
return joystick_map[guid].emplace_back(std::move(joystick));
}
void InitJoystick(int joystick_index) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
SDL_Joystick* sdl_joystick = SDL_JoystickOpen(joystick_index);
if (!sdl_joystick) {
LOG_ERROR(Input, "failed to open joystick {}", joystick_index);
return;
}
std::string guid = GetGUID(sdl_joystick);
if (joystick_map.find(guid) == joystick_map.end()) {
auto joystick = std::make_shared<SDLJoystick>(guid, 0, sdl_joystick);
joystick_map[guid].emplace_back(std::move(joystick));
return;
}
auto& joystick_guid_list = joystick_map[guid];
const auto it = std::find_if(
joystick_guid_list.begin(), joystick_guid_list.end(),
[](const std::shared_ptr<SDLJoystick>& joystick) { return !joystick->GetSDLJoystick(); });
if (it != joystick_guid_list.end()) {
(*it)->SetSDLJoystick(sdl_joystick);
return;
}
auto joystick = std::make_shared<SDLJoystick>(guid, joystick_guid_list.size(), sdl_joystick);
joystick_guid_list.emplace_back(std::move(joystick));
}
void CloseJoystick(SDL_Joystick* sdl_joystick) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
std::string guid = GetGUID(sdl_joystick);
// This call to guid is save since the joystick is guranteed to be in that map
auto& joystick_guid_list = joystick_map[guid];
const auto joystick_it =
std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
[&sdl_joystick](const std::shared_ptr<SDLJoystick>& joystick) {
return joystick->GetSDLJoystick() == sdl_joystick;
});
(*joystick_it)->SetSDLJoystick(nullptr, [](SDL_Joystick*) {});
}
void HandleGameControllerEvent(const SDL_Event& event) {
switch (event.type) {
case SDL_JOYBUTTONUP: {
auto joystick = GetSDLJoystickBySDLID(event.jbutton.which);
if (joystick) {
joystick->SetButton(event.jbutton.button, false);
}
break;
}
case SDL_JOYBUTTONDOWN: {
auto joystick = GetSDLJoystickBySDLID(event.jbutton.which);
if (joystick) {
joystick->SetButton(event.jbutton.button, true);
}
break;
}
case SDL_JOYHATMOTION: {
auto joystick = GetSDLJoystickBySDLID(event.jhat.which);
if (joystick) {
joystick->SetHat(event.jhat.hat, event.jhat.value);
}
break;
}
case SDL_JOYAXISMOTION: {
auto joystick = GetSDLJoystickBySDLID(event.jaxis.which);
if (joystick) {
joystick->SetAxis(event.jaxis.axis, event.jaxis.value);
}
break;
}
case SDL_JOYDEVICEREMOVED:
LOG_DEBUG(Input, "Controller removed with Instance_ID {}", event.jdevice.which);
CloseJoystick(SDL_JoystickFromInstanceID(event.jdevice.which));
break;
case SDL_JOYDEVICEADDED:
LOG_DEBUG(Input, "Controller connected with device index {}", event.jdevice.which);
InitJoystick(event.jdevice.which);
break;
}
}
void CloseSDLJoysticks() {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
joystick_map.clear();
}
void PollLoop() {
if (SDL_Init(SDL_INIT_JOYSTICK) < 0) {
LOG_CRITICAL(Input, "SDL_Init(SDL_INIT_JOYSTICK) failed with: {}", SDL_GetError());
return;
}
SDL_Event event;
while (initialized) {
// Wait for 10 ms or until an event happens
if (SDL_WaitEventTimeout(&event, 10)) {
// Don't handle the event if we are configuring
if (polling) {
event_queue.Push(event);
} else {
HandleGameControllerEvent(event);
}
}
}
CloseSDLJoysticks();
SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
}
class SDLButton final : public Input::ButtonDevice {
public:
explicit SDLButton(std::shared_ptr<SDLJoystick> joystick_, int button_)
: joystick(std::move(joystick_)), button(button_) {}
bool GetStatus() const override {
return joystick->GetButton(button);
}
private:
std::shared_ptr<SDLJoystick> joystick;
int button;
};
class SDLDirectionButton final : public Input::ButtonDevice {
public:
explicit SDLDirectionButton(std::shared_ptr<SDLJoystick> joystick_, int hat_, Uint8 direction_)
: joystick(std::move(joystick_)), hat(hat_), direction(direction_) {}
bool GetStatus() const override {
return joystick->GetHatDirection(hat, direction);
}
private:
std::shared_ptr<SDLJoystick> joystick;
int hat;
Uint8 direction;
};
class SDLAxisButton final : public Input::ButtonDevice {
public:
explicit SDLAxisButton(std::shared_ptr<SDLJoystick> joystick_, int axis_, float threshold_,
bool trigger_if_greater_)
: joystick(std::move(joystick_)), axis(axis_), threshold(threshold_),
trigger_if_greater(trigger_if_greater_) {}
bool GetStatus() const override {
float axis_value = joystick->GetAxis(axis);
if (trigger_if_greater)
return axis_value > threshold;
return axis_value < threshold;
}
private:
std::shared_ptr<SDLJoystick> joystick;
int axis;
float threshold;
bool trigger_if_greater;
};
class SDLAnalog final : public Input::AnalogDevice {
public:
SDLAnalog(std::shared_ptr<SDLJoystick> joystick_, int axis_x_, int axis_y_)
: joystick(std::move(joystick_)), axis_x(axis_x_), axis_y(axis_y_) {}
std::tuple<float, float> GetStatus() const override {
return joystick->GetAnalog(axis_x, axis_y);
}
private:
std::shared_ptr<SDLJoystick> joystick;
int axis_x;
int axis_y;
};
/// A button device factory that creates button devices from SDL joystick
class SDLButtonFactory final : public Input::Factory<Input::ButtonDevice> {
public:
/**
* Creates a button device from a joystick button
* @param params contains parameters for creating the device:
* - "guid": the guid of the joystick to bind
* - "port": the nth joystick of the same type to bind
* - "button"(optional): the index of the button to bind
* - "hat"(optional): the index of the hat to bind as direction buttons
* - "axis"(optional): the index of the axis to bind
* - "direction"(only used for hat): the direction name of the hat to bind. Can be "up",
* "down", "left" or "right"
* - "threshold"(only used for axis): a float value in (-1.0, 1.0) which the button is
* triggered if the axis value crosses
* - "direction"(only used for axis): "+" means the button is triggered when the axis
* value is greater than the threshold; "-" means the button is triggered when the axis
* value is smaller than the threshold
*/
std::unique_ptr<Input::ButtonDevice> Create(const Common::ParamPackage& params) override {
const std::string guid = params.Get("guid", "0");
const int port = params.Get("port", 0);
auto joystick = GetSDLJoystickByGUID(guid, port);
if (params.Has("hat")) {
const int hat = params.Get("hat", 0);
const std::string direction_name = params.Get("direction", "");
Uint8 direction;
if (direction_name == "up") {
direction = SDL_HAT_UP;
} else if (direction_name == "down") {
direction = SDL_HAT_DOWN;
} else if (direction_name == "left") {
direction = SDL_HAT_LEFT;
} else if (direction_name == "right") {
direction = SDL_HAT_RIGHT;
} else {
direction = 0;
}
// This is necessary so accessing GetHat with hat won't crash
joystick->SetHat(hat, SDL_HAT_CENTERED);
return std::make_unique<SDLDirectionButton>(joystick, hat, direction);
}
if (params.Has("axis")) {
const int axis = params.Get("axis", 0);
const float threshold = params.Get("threshold", 0.5f);
const std::string direction_name = params.Get("direction", "");
bool trigger_if_greater;
if (direction_name == "+") {
trigger_if_greater = true;
} else if (direction_name == "-") {
trigger_if_greater = false;
} else {
trigger_if_greater = true;
LOG_ERROR(Input, "Unknown direction {}", direction_name);
}
// This is necessary so accessing GetAxis with axis won't crash
joystick->SetAxis(axis, 0);
return std::make_unique<SDLAxisButton>(joystick, axis, threshold, trigger_if_greater);
}
const int button = params.Get("button", 0);
// This is necessary so accessing GetButton with button won't crash
joystick->SetButton(button, false);
return std::make_unique<SDLButton>(joystick, button);
}
};
/// An analog device factory that creates analog devices from SDL joystick
class SDLAnalogFactory final : public Input::Factory<Input::AnalogDevice> {
public:
/**
* Creates analog device from joystick axes
* @param params contains parameters for creating the device:
* - "guid": the guid of the joystick to bind
* - "port": the nth joystick of the same type
* - "axis_x": the index of the axis to be bind as x-axis
* - "axis_y": the index of the axis to be bind as y-axis
*/
std::unique_ptr<Input::AnalogDevice> Create(const Common::ParamPackage& params) override {
const std::string guid = params.Get("guid", "0");
const int port = params.Get("port", 0);
const int axis_x = params.Get("axis_x", 0);
const int axis_y = params.Get("axis_y", 1);
auto joystick = GetSDLJoystickByGUID(guid, port);
// This is necessary so accessing GetAxis with axis_x and axis_y won't crash
joystick->SetAxis(axis_x, 0);
joystick->SetAxis(axis_y, 0);
return std::make_unique<SDLAnalog>(joystick, axis_x, axis_y);
}
};
void Init() {
using namespace Input;
RegisterFactory<ButtonDevice>("sdl", std::make_shared<SDLButtonFactory>());
RegisterFactory<AnalogDevice>("sdl", std::make_shared<SDLAnalogFactory>());
polling = false;
initialized = true;
}
void Shutdown() {
if (initialized) {
using namespace Input;
UnregisterFactory<ButtonDevice>("sdl");
UnregisterFactory<AnalogDevice>("sdl");
initialized = false;
}
}
Common::ParamPackage SDLEventToButtonParamPackage(const SDL_Event& event) {
Common::ParamPackage params({{"engine", "sdl"}});
switch (event.type) {
case SDL_JOYAXISMOTION: {
auto joystick = GetSDLJoystickBySDLID(event.jaxis.which);
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("axis", event.jaxis.axis);
if (event.jaxis.value > 0) {
params.Set("direction", "+");
params.Set("threshold", "0.5");
} else {
params.Set("direction", "-");
params.Set("threshold", "-0.5");
}
break;
}
case SDL_JOYBUTTONUP: {
auto joystick = GetSDLJoystickBySDLID(event.jbutton.which);
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("button", event.jbutton.button);
break;
}
case SDL_JOYHATMOTION: {
auto joystick = GetSDLJoystickBySDLID(event.jhat.which);
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("hat", event.jhat.hat);
switch (event.jhat.value) {
case SDL_HAT_UP:
params.Set("direction", "up");
break;
case SDL_HAT_DOWN:
params.Set("direction", "down");
break;
case SDL_HAT_LEFT:
params.Set("direction", "left");
break;
case SDL_HAT_RIGHT:
params.Set("direction", "right");
break;
default:
return {};
}
break;
}
}
return params;
}
namespace Polling {
class SDLPoller : public InputCommon::Polling::DevicePoller {
public:
void Start() override {
event_queue.Clear();
polling = true;
}
void Stop() override {
polling = false;
}
};
class SDLButtonPoller final : public SDLPoller {
public:
Common::ParamPackage GetNextInput() override {
SDL_Event event;
while (event_queue.Pop(event)) {
switch (event.type) {
case SDL_JOYAXISMOTION:
if (std::abs(event.jaxis.value / 32767.0) < 0.5) {
break;
}
case SDL_JOYBUTTONUP:
case SDL_JOYHATMOTION:
return SDLEventToButtonParamPackage(event);
}
}
return {};
}
};
class SDLAnalogPoller final : public SDLPoller {
public:
void Start() override {
SDLPoller::Start();
// Reset stored axes
analog_xaxis = -1;
analog_yaxis = -1;
analog_axes_joystick = -1;
}
Common::ParamPackage GetNextInput() override {
SDL_Event event;
while (event_queue.Pop(event)) {
if (event.type != SDL_JOYAXISMOTION || std::abs(event.jaxis.value / 32767.0) < 0.5) {
continue;
}
// An analog device needs two axes, so we need to store the axis for later and wait for
// a second SDL event. The axes also must be from the same joystick.
int axis = event.jaxis.axis;
if (analog_xaxis == -1) {
analog_xaxis = axis;
analog_axes_joystick = event.jaxis.which;
} else if (analog_yaxis == -1 && analog_xaxis != axis &&
analog_axes_joystick == event.jaxis.which) {
analog_yaxis = axis;
}
}
Common::ParamPackage params;
if (analog_xaxis != -1 && analog_yaxis != -1) {
auto joystick = GetSDLJoystickBySDLID(event.jaxis.which);
params.Set("engine", "sdl");
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("axis_x", analog_xaxis);
params.Set("axis_y", analog_yaxis);
analog_xaxis = -1;
analog_yaxis = -1;
analog_axes_joystick = -1;
return params;
}
return params;
}
private:
int analog_xaxis = -1;
int analog_yaxis = -1;
SDL_JoystickID analog_axes_joystick = -1;
};
void GetPollers(InputCommon::Polling::DeviceType type,
std::vector<std::unique_ptr<InputCommon::Polling::DevicePoller>>& pollers) {
switch (type) {
case InputCommon::Polling::DeviceType::Analog:
pollers.emplace_back(std::make_unique<SDLAnalogPoller>());
break;
case InputCommon::Polling::DeviceType::Button:
pollers.emplace_back(std::make_unique<SDLButtonPoller>());
break;
}
}
} // namespace Polling
} // namespace SDL
} // namespace InputCommon

55
src/input_common/sdl/sdl.h
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@ -1,4 +1,4 @@
// Copyright 2017 Citra Emulator Project // Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version // Licensed under GPLv2 or any later version
// Refer to the license.txt file included. // Refer to the license.txt file included.
@ -7,45 +7,38 @@
#include <memory> #include <memory>
#include <vector> #include <vector>
#include "core/frontend/input.h" #include "core/frontend/input.h"
#include "input_common/main.h"
union SDL_Event; union SDL_Event;
namespace Common { namespace Common {
class ParamPackage; class ParamPackage;
} } // namespace Common
namespace InputCommon {
namespace Polling { namespace InputCommon::Polling {
class DevicePoller; class DevicePoller;
enum class DeviceType; enum class DeviceType;
} // namespace Polling } // namespace InputCommon::Polling
} // namespace InputCommon
namespace InputCommon { namespace InputCommon::SDL {
namespace SDL {
/// Initializes and registers SDL device factories class State {
void Init(); public:
/// Unresisters SDL device factories and shut them down.
virtual ~State() = default;
/// Unresisters SDL device factories and shut them down. virtual void GetPollers(
void Shutdown(); InputCommon::Polling::DeviceType type,
std::vector<std::unique_ptr<InputCommon::Polling::DevicePoller>>& pollers) = 0;
};
/// Needs to be called before SDL_QuitSubSystem. class NullState : public State {
void CloseSDLJoysticks(); public:
void GetPollers(
InputCommon::Polling::DeviceType type,
std::vector<std::unique_ptr<InputCommon::Polling::DevicePoller>>& pollers) override {}
};
/// Handle SDL_Events for joysticks from SDL_PollEvent std::unique_ptr<State> Init();
void HandleGameControllerEvent(const SDL_Event& event);
/// A Loop that calls HandleGameControllerEvent until Shutdown is called } // namespace InputCommon::SDL
void PollLoop();
/// Creates a ParamPackage from an SDL_Event that can directly be used to create a ButtonDevice
Common::ParamPackage SDLEventToButtonParamPackage(const SDL_Event& event);
namespace Polling {
/// Get all DevicePoller that use the SDL backend for a specific device type
void GetPollers(InputCommon::Polling::DeviceType type,
std::vector<std::unique_ptr<InputCommon::Polling::DevicePoller>>& pollers);
} // namespace Polling
} // namespace SDL
} // namespace InputCommon

651
src/input_common/sdl/sdl_impl.cpp Normal file
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@ -0,0 +1,651 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <atomic>
#include <cmath>
#include <functional>
#include <iterator>
#include <mutex>
#include <string>
#include <thread>
#include <tuple>
#include <unordered_map>
#include <utility>
#include <vector>
#include <SDL.h>
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/math_util.h"
#include "common/param_package.h"
#include "common/threadsafe_queue.h"
#include "core/frontend/input.h"
#include "input_common/sdl/sdl_impl.h"
namespace InputCommon {
namespace SDL {
static std::string GetGUID(SDL_Joystick* joystick) {
SDL_JoystickGUID guid = SDL_JoystickGetGUID(joystick);
char guid_str[33];
SDL_JoystickGetGUIDString(guid, guid_str, sizeof(guid_str));
return guid_str;
}
/// Creates a ParamPackage from an SDL_Event that can directly be used to create a ButtonDevice
static Common::ParamPackage SDLEventToButtonParamPackage(SDLState& state, const SDL_Event& event);
static int SDLEventWatcher(void* userdata, SDL_Event* event) {
SDLState* sdl_state = reinterpret_cast<SDLState*>(userdata);
// Don't handle the event if we are configuring
if (sdl_state->polling) {
sdl_state->event_queue.Push(*event);
} else {
sdl_state->HandleGameControllerEvent(*event);
}
return 0;
}
class SDLJoystick {
public:
SDLJoystick(std::string guid_, int port_, SDL_Joystick* joystick,
decltype(&SDL_JoystickClose) deleter = &SDL_JoystickClose)
: guid{std::move(guid_)}, port{port_}, sdl_joystick{joystick, deleter} {}
void SetButton(int button, bool value) {
std::lock_guard<std::mutex> lock(mutex);
state.buttons[button] = value;
}
bool GetButton(int button) const {
std::lock_guard<std::mutex> lock(mutex);
return state.buttons.at(button);
}
void SetAxis(int axis, Sint16 value) {
std::lock_guard<std::mutex> lock(mutex);
state.axes[axis] = value;
}
float GetAxis(int axis) const {
std::lock_guard<std::mutex> lock(mutex);
return state.axes.at(axis) / 32767.0f;
}
std::tuple<float, float> GetAnalog(int axis_x, int axis_y) const {
float x = GetAxis(axis_x);
float y = GetAxis(axis_y);
y = -y; // 3DS uses an y-axis inverse from SDL
// Make sure the coordinates are in the unit circle,
// otherwise normalize it.
float r = x * x + y * y;
if (r > 1.0f) {
r = std::sqrt(r);
x /= r;
y /= r;
}
return std::make_tuple(x, y);
}
void SetHat(int hat, Uint8 direction) {
std::lock_guard<std::mutex> lock(mutex);
state.hats[hat] = direction;
}
bool GetHatDirection(int hat, Uint8 direction) const {
std::lock_guard<std::mutex> lock(mutex);
return (state.hats.at(hat) & direction) != 0;
}
/**
* The guid of the joystick
*/
const std::string& GetGUID() const {
return guid;
}
/**
* The number of joystick from the same type that were connected before this joystick
*/
int GetPort() const {
return port;
}
SDL_Joystick* GetSDLJoystick() const {
return sdl_joystick.get();
}
void SetSDLJoystick(SDL_Joystick* joystick,
decltype(&SDL_JoystickClose) deleter = &SDL_JoystickClose) {
sdl_joystick =
std::unique_ptr<SDL_Joystick, decltype(&SDL_JoystickClose)>(joystick, deleter);
}
private:
struct State {
std::unordered_map<int, bool> buttons;
std::unordered_map<int, Sint16> axes;
std::unordered_map<int, Uint8> hats;
} state;
std::string guid;
int port;
std::unique_ptr<SDL_Joystick, decltype(&SDL_JoystickClose)> sdl_joystick;
mutable std::mutex mutex;
};
/**
* Get the nth joystick with the corresponding GUID
*/
std::shared_ptr<SDLJoystick> SDLState::GetSDLJoystickByGUID(const std::string& guid, int port) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
const auto it = joystick_map.find(guid);
if (it != joystick_map.end()) {
while (it->second.size() <= port) {
auto joystick = std::make_shared<SDLJoystick>(guid, it->second.size(), nullptr,
[](SDL_Joystick*) {});
it->second.emplace_back(std::move(joystick));
}
return it->second[port];
}
auto joystick = std::make_shared<SDLJoystick>(guid, 0, nullptr, [](SDL_Joystick*) {});
return joystick_map[guid].emplace_back(std::move(joystick));
}
/**
* Check how many identical joysticks (by guid) were connected before the one with sdl_id and so tie
* it to a SDLJoystick with the same guid and that port
*/
std::shared_ptr<SDLJoystick> SDLState::GetSDLJoystickBySDLID(SDL_JoystickID sdl_id) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
auto sdl_joystick = SDL_JoystickFromInstanceID(sdl_id);
const std::string guid = GetGUID(sdl_joystick);
auto map_it = joystick_map.find(guid);
if (map_it != joystick_map.end()) {
auto vec_it = std::find_if(map_it->second.begin(), map_it->second.end(),
[&sdl_joystick](const std::shared_ptr<SDLJoystick>& joystick) {
return sdl_joystick == joystick->GetSDLJoystick();
});
if (vec_it != map_it->second.end()) {
// This is the common case: There is already an existing SDL_Joystick maped to a
// SDLJoystick. return the SDLJoystick
return *vec_it;
}
// Search for a SDLJoystick without a mapped SDL_Joystick...
auto nullptr_it = std::find_if(map_it->second.begin(), map_it->second.end(),
[](const std::shared_ptr<SDLJoystick>& joystick) {
return !joystick->GetSDLJoystick();
});
if (nullptr_it != map_it->second.end()) {
// ... and map it
(*nullptr_it)->SetSDLJoystick(sdl_joystick);
return *nullptr_it;
}
// There is no SDLJoystick without a mapped SDL_Joystick
// Create a new SDLJoystick
auto joystick = std::make_shared<SDLJoystick>(guid, map_it->second.size(), sdl_joystick);
return map_it->second.emplace_back(std::move(joystick));
}
auto joystick = std::make_shared<SDLJoystick>(guid, 0, sdl_joystick);
return joystick_map[guid].emplace_back(std::move(joystick));
}
void SDLState::InitJoystick(int joystick_index) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
SDL_Joystick* sdl_joystick = SDL_JoystickOpen(joystick_index);
if (!sdl_joystick) {
LOG_ERROR(Input, "failed to open joystick {}", joystick_index);
return;
}
std::string guid = GetGUID(sdl_joystick);
if (joystick_map.find(guid) == joystick_map.end()) {
auto joystick = std::make_shared<SDLJoystick>(guid, 0, sdl_joystick);
joystick_map[guid].emplace_back(std::move(joystick));
return;
}
auto& joystick_guid_list = joystick_map[guid];
const auto it = std::find_if(
joystick_guid_list.begin(), joystick_guid_list.end(),
[](const std::shared_ptr<SDLJoystick>& joystick) { return !joystick->GetSDLJoystick(); });
if (it != joystick_guid_list.end()) {
(*it)->SetSDLJoystick(sdl_joystick);
return;
}
auto joystick = std::make_shared<SDLJoystick>(guid, joystick_guid_list.size(), sdl_joystick);
joystick_guid_list.emplace_back(std::move(joystick));
}
void SDLState::CloseJoystick(SDL_Joystick* sdl_joystick) {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
std::string guid = GetGUID(sdl_joystick);
// This call to guid is safe since the joystick is guaranteed to be in the map
auto& joystick_guid_list = joystick_map[guid];
const auto joystick_it =
std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
[&sdl_joystick](const std::shared_ptr<SDLJoystick>& joystick) {
return joystick->GetSDLJoystick() == sdl_joystick;
});
(*joystick_it)->SetSDLJoystick(nullptr, [](SDL_Joystick*) {});
}
void SDLState::HandleGameControllerEvent(const SDL_Event& event) {
switch (event.type) {
case SDL_JOYBUTTONUP: {
if (auto joystick = GetSDLJoystickBySDLID(event.jbutton.which)) {
joystick->SetButton(event.jbutton.button, false);
}
break;
}
case SDL_JOYBUTTONDOWN: {
if (auto joystick = GetSDLJoystickBySDLID(event.jbutton.which)) {
joystick->SetButton(event.jbutton.button, true);
}
break;
}
case SDL_JOYHATMOTION: {
if (auto joystick = GetSDLJoystickBySDLID(event.jhat.which)) {
joystick->SetHat(event.jhat.hat, event.jhat.value);
}
break;
}
case SDL_JOYAXISMOTION: {
if (auto joystick = GetSDLJoystickBySDLID(event.jaxis.which)) {
joystick->SetAxis(event.jaxis.axis, event.jaxis.value);
}
break;
}
case SDL_JOYDEVICEREMOVED:
LOG_DEBUG(Input, "Controller removed with Instance_ID {}", event.jdevice.which);
CloseJoystick(SDL_JoystickFromInstanceID(event.jdevice.which));
break;
case SDL_JOYDEVICEADDED:
LOG_DEBUG(Input, "Controller connected with device index {}", event.jdevice.which);
InitJoystick(event.jdevice.which);
break;
}
}
void SDLState::CloseJoysticks() {
std::lock_guard<std::mutex> lock(joystick_map_mutex);
joystick_map.clear();
}
class SDLButton final : public Input::ButtonDevice {
public:
explicit SDLButton(std::shared_ptr<SDLJoystick> joystick_, int button_)
: joystick(std::move(joystick_)), button(button_) {}
bool GetStatus() const override {
return joystick->GetButton(button);
}
private:
std::shared_ptr<SDLJoystick> joystick;
int button;
};
class SDLDirectionButton final : public Input::ButtonDevice {
public:
explicit SDLDirectionButton(std::shared_ptr<SDLJoystick> joystick_, int hat_, Uint8 direction_)
: joystick(std::move(joystick_)), hat(hat_), direction(direction_) {}
bool GetStatus() const override {
return joystick->GetHatDirection(hat, direction);
}
private:
std::shared_ptr<SDLJoystick> joystick;
int hat;
Uint8 direction;
};
class SDLAxisButton final : public Input::ButtonDevice {
public:
explicit SDLAxisButton(std::shared_ptr<SDLJoystick> joystick_, int axis_, float threshold_,
bool trigger_if_greater_)
: joystick(std::move(joystick_)), axis(axis_), threshold(threshold_),
trigger_if_greater(trigger_if_greater_) {}
bool GetStatus() const override {
float axis_value = joystick->GetAxis(axis);
if (trigger_if_greater)
return axis_value > threshold;
return axis_value < threshold;
}
private:
std::shared_ptr<SDLJoystick> joystick;
int axis;
float threshold;
bool trigger_if_greater;
};
class SDLAnalog final : public Input::AnalogDevice {
public:
SDLAnalog(std::shared_ptr<SDLJoystick> joystick_, int axis_x_, int axis_y_)
: joystick(std::move(joystick_)), axis_x(axis_x_), axis_y(axis_y_) {}
std::tuple<float, float> GetStatus() const override {
return joystick->GetAnalog(axis_x, axis_y);
}
private:
std::shared_ptr<SDLJoystick> joystick;
int axis_x;
int axis_y;
};
/// A button device factory that creates button devices from SDL joystick
class SDLButtonFactory final : public Input::Factory<Input::ButtonDevice> {
public:
explicit SDLButtonFactory(SDLState& state_) : state(state_) {}
/**
* Creates a button device from a joystick button
* @param params contains parameters for creating the device:
* - "guid": the guid of the joystick to bind
* - "port": the nth joystick of the same type to bind
* - "button"(optional): the index of the button to bind
* - "hat"(optional): the index of the hat to bind as direction buttons
* - "axis"(optional): the index of the axis to bind
* - "direction"(only used for hat): the direction name of the hat to bind. Can be "up",
* "down", "left" or "right"
* - "threshold"(only used for axis): a float value in (-1.0, 1.0) which the button is
* triggered if the axis value crosses
* - "direction"(only used for axis): "+" means the button is triggered when the axis
* value is greater than the threshold; "-" means the button is triggered when the axis
* value is smaller than the threshold
*/
std::unique_ptr<Input::ButtonDevice> Create(const Common::ParamPackage& params) override {
const std::string guid = params.Get("guid", "0");
const int port = params.Get("port", 0);
auto joystick = state.GetSDLJoystickByGUID(guid, port);
if (params.Has("hat")) {
const int hat = params.Get("hat", 0);
const std::string direction_name = params.Get("direction", "");
Uint8 direction;
if (direction_name == "up") {
direction = SDL_HAT_UP;
} else if (direction_name == "down") {
direction = SDL_HAT_DOWN;
} else if (direction_name == "left") {
direction = SDL_HAT_LEFT;
} else if (direction_name == "right") {
direction = SDL_HAT_RIGHT;
} else {
direction = 0;
}
// This is necessary so accessing GetHat with hat won't crash
joystick->SetHat(hat, SDL_HAT_CENTERED);
return std::make_unique<SDLDirectionButton>(joystick, hat, direction);
}
if (params.Has("axis")) {
const int axis = params.Get("axis", 0);
const float threshold = params.Get("threshold", 0.5f);
const std::string direction_name = params.Get("direction", "");
bool trigger_if_greater;
if (direction_name == "+") {
trigger_if_greater = true;
} else if (direction_name == "-") {
trigger_if_greater = false;
} else {
trigger_if_greater = true;
LOG_ERROR(Input, "Unknown direction {}", direction_name);
}
// This is necessary so accessing GetAxis with axis won't crash
joystick->SetAxis(axis, 0);
return std::make_unique<SDLAxisButton>(joystick, axis, threshold, trigger_if_greater);
}
const int button = params.Get("button", 0);
// This is necessary so accessing GetButton with button won't crash
joystick->SetButton(button, false);
return std::make_unique<SDLButton>(joystick, button);
}
private:
SDLState& state;
};
/// An analog device factory that creates analog devices from SDL joystick
class SDLAnalogFactory final : public Input::Factory<Input::AnalogDevice> {
public:
explicit SDLAnalogFactory(SDLState& state_) : state(state_) {}
/**
* Creates analog device from joystick axes
* @param params contains parameters for creating the device:
* - "guid": the guid of the joystick to bind
* - "port": the nth joystick of the same type
* - "axis_x": the index of the axis to be bind as x-axis
* - "axis_y": the index of the axis to be bind as y-axis
*/
std::unique_ptr<Input::AnalogDevice> Create(const Common::ParamPackage& params) override {
const std::string guid = params.Get("guid", "0");
const int port = params.Get("port", 0);
const int axis_x = params.Get("axis_x", 0);
const int axis_y = params.Get("axis_y", 1);
auto joystick = state.GetSDLJoystickByGUID(guid, port);
// This is necessary so accessing GetAxis with axis_x and axis_y won't crash
joystick->SetAxis(axis_x, 0);
joystick->SetAxis(axis_y, 0);
return std::make_unique<SDLAnalog>(joystick, axis_x, axis_y);
}
private:
SDLState& state;
};
SDLState::SDLState() {
using namespace Input;
RegisterFactory<ButtonDevice>("sdl", std::make_shared<SDLButtonFactory>(*this));
RegisterFactory<AnalogDevice>("sdl", std::make_shared<SDLAnalogFactory>(*this));
// If the frontend is going to manage the event loop, then we dont start one here
start_thread = !SDL_WasInit(SDL_INIT_JOYSTICK);
if (start_thread && SDL_Init(SDL_INIT_JOYSTICK) < 0) {
LOG_CRITICAL(Input, "SDL_Init(SDL_INIT_JOYSTICK) failed with: {}", SDL_GetError());
return;
}
SDL_AddEventWatch(&SDLEventWatcher, this);
initialized = true;
if (start_thread) {
poll_thread = std::thread([&] {
using namespace std::chrono_literals;
SDL_Event event;
while (initialized) {
SDL_PumpEvents();
std::this_thread::sleep_for(std::chrono::duration(10ms));
}
});
}
// Because the events for joystick connection happens before we have our event watcher added, we
// can just open all the joysticks right here
for (int i = 0; i < SDL_NumJoysticks(); ++i) {
InitJoystick(i);
}
}
SDLState::~SDLState() {
using namespace Input;
UnregisterFactory<ButtonDevice>("sdl");
UnregisterFactory<AnalogDevice>("sdl");
CloseJoysticks();
SDL_DelEventWatch(&SDLEventWatcher, this);
initialized = false;
if (start_thread) {
poll_thread.join();
SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
}
}
Common::ParamPackage SDLEventToButtonParamPackage(SDLState& state, const SDL_Event& event) {
Common::ParamPackage params({{"engine", "sdl"}});
switch (event.type) {
case SDL_JOYAXISMOTION: {
auto joystick = state.GetSDLJoystickBySDLID(event.jaxis.which);
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("axis", event.jaxis.axis);
if (event.jaxis.value > 0) {
params.Set("direction", "+");
params.Set("threshold", "0.5");
} else {
params.Set("direction", "-");
params.Set("threshold", "-0.5");
}
break;
}
case SDL_JOYBUTTONUP: {
auto joystick = state.GetSDLJoystickBySDLID(event.jbutton.which);
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("button", event.jbutton.button);
break;
}
case SDL_JOYHATMOTION: {
auto joystick = state.GetSDLJoystickBySDLID(event.jhat.which);
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("hat", event.jhat.hat);
switch (event.jhat.value) {
case SDL_HAT_UP:
params.Set("direction", "up");
break;
case SDL_HAT_DOWN:
params.Set("direction", "down");
break;
case SDL_HAT_LEFT:
params.Set("direction", "left");
break;
case SDL_HAT_RIGHT:
params.Set("direction", "right");
break;
default:
return {};
}
break;
}
}
return params;
}
namespace Polling {
class SDLPoller : public InputCommon::Polling::DevicePoller {
public:
explicit SDLPoller(SDLState& state_) : state(state_) {}
void Start() override {
state.event_queue.Clear();
state.polling = true;
}
void Stop() override {
state.polling = false;
}
protected:
SDLState& state;
};
class SDLButtonPoller final : public SDLPoller {
public:
explicit SDLButtonPoller(SDLState& state_) : SDLPoller(state_) {}
Common::ParamPackage GetNextInput() override {
SDL_Event event;
while (state.event_queue.Pop(event)) {
switch (event.type) {
case SDL_JOYAXISMOTION:
if (std::abs(event.jaxis.value / 32767.0) < 0.5) {
break;
}
case SDL_JOYBUTTONUP:
case SDL_JOYHATMOTION:
return SDLEventToButtonParamPackage(state, event);
}
}
return {};
}
};
class SDLAnalogPoller final : public SDLPoller {
public:
explicit SDLAnalogPoller(SDLState& state_) : SDLPoller(state_) {}
void Start() override {
SDLPoller::Start();
// Reset stored axes
analog_xaxis = -1;
analog_yaxis = -1;
analog_axes_joystick = -1;
}
Common::ParamPackage GetNextInput() override {
SDL_Event event;
while (state.event_queue.Pop(event)) {
if (event.type != SDL_JOYAXISMOTION || std::abs(event.jaxis.value / 32767.0) < 0.5) {
continue;
}
// An analog device needs two axes, so we need to store the axis for later and wait for
// a second SDL event. The axes also must be from the same joystick.
int axis = event.jaxis.axis;
if (analog_xaxis == -1) {
analog_xaxis = axis;
analog_axes_joystick = event.jaxis.which;
} else if (analog_yaxis == -1 && analog_xaxis != axis &&
analog_axes_joystick == event.jaxis.which) {
analog_yaxis = axis;
}
}
Common::ParamPackage params;
if (analog_xaxis != -1 && analog_yaxis != -1) {
auto joystick = state.GetSDLJoystickBySDLID(event.jaxis.which);
params.Set("engine", "sdl");
params.Set("port", joystick->GetPort());
params.Set("guid", joystick->GetGUID());
params.Set("axis_x", analog_xaxis);
params.Set("axis_y", analog_yaxis);
analog_xaxis = -1;
analog_yaxis = -1;
analog_axes_joystick = -1;
return params;
}
return params;
}
private:
int analog_xaxis = -1;
int analog_yaxis = -1;
SDL_JoystickID analog_axes_joystick = -1;
};
} // namespace Polling
void SDLState::GetPollers(
InputCommon::Polling::DeviceType type,
std::vector<std::unique_ptr<InputCommon::Polling::DevicePoller>>& pollers) {
switch (type) {
case InputCommon::Polling::DeviceType::Analog:
pollers.emplace_back(std::make_unique<Polling::SDLAnalogPoller>(*this));
break;
case InputCommon::Polling::DeviceType::Button:
pollers.emplace_back(std::make_unique<Polling::SDLButtonPoller>(*this));
break;
}
}
} // namespace SDL
} // namespace InputCommon

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src/input_common/sdl/sdl_impl.h Normal file
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// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <atomic>
#include <memory>
#include <thread>
#include "common/threadsafe_queue.h"
#include "input_common/sdl/sdl.h"
union SDL_Event;
using SDL_Joystick = struct _SDL_Joystick;
using SDL_JoystickID = s32;
namespace InputCommon::SDL {
class SDLJoystick;
class SDLButtonFactory;
class SDLAnalogFactory;
class SDLState : public State {
public:
/// Initializes and registers SDL device factories
SDLState();
/// Unresisters SDL device factories and shut them down.
~SDLState() override;
/// Handle SDL_Events for joysticks from SDL_PollEvent
void HandleGameControllerEvent(const SDL_Event& event);
std::shared_ptr<SDLJoystick> GetSDLJoystickBySDLID(SDL_JoystickID sdl_id);
std::shared_ptr<SDLJoystick> GetSDLJoystickByGUID(const std::string& guid, int port);
/// Get all DevicePoller that use the SDL backend for a specific device type
void GetPollers(
InputCommon::Polling::DeviceType type,
std::vector<std::unique_ptr<InputCommon::Polling::DevicePoller>>& pollers) override;
/// Used by the Pollers during config
std::atomic<bool> polling = false;
Common::SPSCQueue<SDL_Event> event_queue;
private:
void InitJoystick(int joystick_index);
void CloseJoystick(SDL_Joystick* sdl_joystick);
/// Needs to be called before SDL_QuitSubSystem.
void CloseJoysticks();
/// Map of GUID of a list of corresponding virtual Joysticks
std::unordered_map<std::string, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
std::mutex joystick_map_mutex;
std::shared_ptr<SDLButtonFactory> button_factory;
std::shared_ptr<SDLAnalogFactory> analog_factory;
bool start_thread = false;
std::atomic<bool> initialized = false;
std::thread poll_thread;
};
} // namespace InputCommon::SDL