citra: update default ini with new input system

src/citra/default_ini.h

@@ -8,34 +8,47 @@ namespace DefaultINI {
 
 const char* sdl2_config_file = R"(
 [Controls]
-pad_start =
-pad_select =
-pad_home =
-pad_dup =
-pad_ddown =
-pad_dleft =
-pad_dright =
-pad_a =
-pad_b =
-pad_x =
-pad_y =
-pad_l =
-pad_r =
-pad_zl =
-pad_zr =
-pad_cup =
-pad_cdown =
-pad_cleft =
-pad_cright =
-pad_circle_up =
-pad_circle_down =
-pad_circle_left =
-pad_circle_right =
-pad_circle_modifier =
+# The input devices and parameters for each 3DS native input
+# It should be in the format of "engine:[engine_name],[param1]:[value1],[param2]:[value2]..."
+# Escape characters $0 (for ':'), $1 (for ',') and $2 (for '$') can be used in values
 
-# The applied modifier scale to circle pad.
+# for button input, the following devices are avaible:
+#  - "keyboard" (default) for keyboard input. Required parameters:
+#      - "code": the code of the key to bind
+#  - "sdl" for joystick input using SDL. Required parameters:
+#      - "joystick": the index of the joystick to bind
+#      - "button"(optional): the index of the button to bind
+#      - "hat"(optional): the index of the hat to bind as direction buttons
+#      - "direction"(only used for hat): the direction name of the hat to bind. Can be "up", "down", "left" or "right"
+button_a=
+button_b=
+button_x=
+button_y=
+button_up=
+button_down=
+button_left=
+button_right=
+button_l=
+button_r=
+button_start=
+button_select=
+button_zl=
+button_zr=
+button_home=
+
+# for analog input, the following devices are avaible:
+#  - "analog_from_button" (default) for emulating analog input from direction buttons.  Required parameters:
+#      - "up", "down", "left", "right": sub-devices for each direction.
+#          Should be in the format as a button input devices using escape characters, for example, "engine$0keyboard$1code$00"
+#      - "modifier": sub-devices as a modifier.
+#      - "modifier_scale": a float number representing the applied modifier scale to the analog input.
 #          Must be in range of 0.0-1.0. Defaults to 0.5
-pad_circle_modifier_scale =
+#  - "sdl" for joystick input using SDL. Required parameters:
+#      - "joystick": the index of the joystick to bind
+#      - "axis_x": the index of the axis to bind as x-axis (default to 0)
+#      - "axis_y": the index of the axis to bind as y-axis (default to 1)
+circle_pad=
+c_stick=
 
 [Core]
 # Whether to use the Just-In-Time (JIT) compiler for CPU emulation