Input: UDP Client to provide motion and touch controls

An implementation of the cemuhook motion/touch protocol, this adds the
ability for users to connect several different devices to citra to send
direct motion and touch data to citra.

Co-Authored-By: jroweboy <jroweboy@gmail.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/src/yuzu_cmd/config.cpp b/src/yuzu_cmd/config.cpp
index 1a812cb87..86f65cf46 100644
--- a/src/yuzu_cmd/config.cpp
+++ b/src/yuzu_cmd/config.cpp
@@ -12,6 +12,7 @@
 #include "core/hle/service/acc/profile_manager.h"
 #include "core/settings.h"
 #include "input_common/main.h"
+#include "input_common/udp/client.h"
 #include "yuzu_cmd/config.h"
 #include "yuzu_cmd/default_ini.h"
 
@@ -297,6 +298,10 @@ void Config::ReadValues() {
         sdl2_config->GetInteger("ControlsGeneral", "touch_diameter_x", 15);
     Settings::values.touchscreen.diameter_y =
         sdl2_config->GetInteger("ControlsGeneral", "touch_diameter_y", 15);
+    Settings::values.udp_input_address = sdl2_config->GetString(
+        "Controls", "udp_input_address", InputCommon::CemuhookUDP::DEFAULT_ADDR);
+    Settings::values.udp_input_port = static_cast<u16>(sdl2_config->GetInteger(
+        "Controls", "udp_input_port", InputCommon::CemuhookUDP::DEFAULT_PORT));
 
     std::transform(keyboard_keys.begin(), keyboard_keys.end(),
                    Settings::values.keyboard_keys.begin(), InputCommon::GenerateKeyboardParam);
diff --git a/src/yuzu_cmd/default_ini.h b/src/yuzu_cmd/default_ini.h
index 8d18a4a5a..e829f8695 100644
--- a/src/yuzu_cmd/default_ini.h
+++ b/src/yuzu_cmd/default_ini.h
@@ -69,12 +69,29 @@ rstick=
 #  - "motion_emu" (default) for emulating motion input from mouse input. Required parameters:
 #      - "update_period": update period in milliseconds (default to 100)
 #      - "sensitivity": the coefficient converting mouse movement to tilting angle (default to 0.01)
+#  - "cemuhookudp" reads motion input from a udp server that uses cemuhook's udp protocol
 motion_device=
 
 # for touch input, the following devices are available:
 #  - "emu_window" (default) for emulating touch input from mouse input to the emulation window. No parameters required
+#  - "cemuhookudp" reads touch input from a udp server that uses cemuhook's udp protocol
+#      - "min_x", "min_y", "max_x", "max_y": defines the udp device's touch screen coordinate system
 touch_device=
 
+# Most desktop operating systems do not expose a way to poll the motion state of the controllers
+# so as a way around it, cemuhook created a udp client/server protocol to broadcast the data directly
+# from a controller device to the client program. Citra has a client that can connect and read
+# from any cemuhook compatible motion program.
+
+# IPv4 address of the udp input server (Default "127.0.0.1")
+udp_input_address=
+
+# Port of the udp input server. (Default 26760)
+udp_input_port=
+
+# The pad to request data on. Should be between 0 (Pad 1) and 3 (Pad 4). (Default 0)
+udp_pad_index=
+
 [Core]
 # Whether to use multi-core for CPU emulation
 # 0 (default): Disabled, 1: Enabled