libretro: Allow to auto detect multitaps

[pcsx_rearmed.git] / frontend / libretro.c

diff --git a/frontend/libretro.c b/frontend/libretro.c
index 2e00623..274d6d5 100644 (file)
--- a/frontend/libretro.c
+++ b/frontend/libretro.c
@@ -62,7 +62,7 @@ int in_type[8] =  { PSE_PAD_TYPE_STANDARD, PSE_PAD_TYPE_STANDARD,
                   PSE_PAD_TYPE_STANDARD, PSE_PAD_TYPE_STANDARD };
 int in_analog_left[8][2] = {{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 }};
 int in_analog_right[8][2] = {{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 },{ 127, 127 }};
-unsigned short in_keystate[8];
+unsigned short in_keystate[PORTS_NUMBER];
 int multitap1 = 0;
 int multitap2 = 0;
 int in_enable_vibration = 1;
@@ -335,16 +335,16 @@ void retro_set_environment(retro_environment_t cb)
    static const struct retro_variable vars[] = {
       { "pcsx_rearmed_frameskip", "Frameskip; 0|1|2|3" },
       { "pcsx_rearmed_region", "Region; Auto|NTSC|PAL" },
-      { "pcsx_rearmed_pad1type", "Pad 1 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_pad2type", "Pad 2 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_pad3type", "Pad 3 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_pad4type", "Pad 4 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_pad5type", "Pad 5 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_pad6type", "Pad 6 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_pad7type", "Pad 7 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_pad8type", "Pad 8 Type; standard|analog|negcon" },
-      { "pcsx_rearmed_multitap1", "Multitap 1; disabled|enabled" },
-      { "pcsx_rearmed_multitap2", "Multitap 2; disabled|enabled" },
+      { "pcsx_rearmed_pad1type", "Pad 1 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_pad2type", "Pad 2 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_pad3type", "Pad 3 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_pad4type", "Pad 4 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_pad5type", "Pad 5 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_pad6type", "Pad 6 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_pad7type", "Pad 7 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_pad8type", "Pad 8 Type; none|standard|analog|negcon" },
+      { "pcsx_rearmed_multitap1", "Multitap 1; auto|disabled|enabled" },
+      { "pcsx_rearmed_multitap2", "Multitap 2; auto|disabled|enabled" },
 #ifndef DRC_DISABLE
       { "pcsx_rearmed_drc", "Dynamic recompiler; enabled|disabled" },
 #endif
@@ -395,11 +395,53 @@ static void update_controller_port_device(unsigned port)
        var.key = "pcsx_rearmed_pad1type";
        if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
        {
-               in_type[0] = PSE_PAD_TYPE_STANDARD;
-               if (strcmp(var.value, "analog") == 0)
+               if (strcmp(var.value, "standard") == 0)
+                       in_type[0] = PSE_PAD_TYPE_STANDARD;
+               else if (strcmp(var.value, "analog") == 0)
                        in_type[0] = PSE_PAD_TYPE_ANALOGPAD;
                else if (strcmp(var.value, "negcon") == 0)
                        in_type[0] = PSE_PAD_TYPE_NEGCON;
+               else // 'none' case
+                       in_type[0] = PSE_PAD_TYPE_NONE;
+       }
+}
+
+static void update_multitap()
+{
+       struct retro_variable var;
+
+       var.value = NULL;
+       var.key = "pcsx_rearmed_multitap1";
+       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+       {
+               if (strcmp(var.value, "enabled") == 0)
+                       multitap1 = 1;
+               else if (strcmp(var.value, "disabled") == 0)
+                       multitap1 = 0;
+               else // 'auto' case
+               {
+                       // If a gamepad is plugged after port 2, we need a first multitap.
+                       multitap1 = 0;
+                       for (int port = 2; port < PORTS_NUMBER; port++)
+                               multitap1 |= in_type[port] != PSE_PAD_TYPE_NONE;
+               }
+       }
+
+       var.value = NULL;
+       var.key = "pcsx_rearmed_multitap2";
+       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+       {
+               if (strcmp(var.value, "enabled") == 0)
+                       multitap2 = 1;
+               else if (strcmp(var.value, "disabled") == 0)
+                       multitap2 = 0;
+               else // 'auto' case
+               {
+                       // If a gamepad is plugged after port 4, we need a second multitap.
+                       multitap2 = 0;
+                       for (int port = 4; port < PORTS_NUMBER; port++)
+                               multitap2 |= in_type[port] != PSE_PAD_TYPE_NONE;
+               }
        }
 }
 
@@ -1101,23 +1143,7 @@ static void update_variables(bool in_flight)
    for (int i = 0; i < PORTS_NUMBER; i++)
       update_controller_port_device(i);
 
-   var.value = NULL;
-   var.key = "pcsx_rearmed_multitap1";
-   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
-   {
-      if (strcmp(var.value, "enabled") == 0)
-         multitap1 = 1;
-      else multitap1 = 0;
-   }
-    
-   var.value = NULL;
-   var.key = "pcsx_rearmed_multitap2";
-   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
-   {
-      if (strcmp(var.value, "enabled") == 0)
-         multitap2 = 1;
-      else multitap2 = 0;
-   }
+   update_multitap();
 
 #ifdef __ARM_NEON__
    var.value = "NULL";
@@ -1265,8 +1291,12 @@ void retro_run(void)
 
        // reset all keystate, query libretro for keystate
        int j;
-       for(i = 0; i < 8; i++) {
+       for(i = 0; i < PORTS_NUMBER; i++) {
                in_keystate[i] = 0;
+
+               if (in_type[i] == PSE_PAD_TYPE_NONE)
+                       continue;
+
                // query libretro for keystate
                for (j = 0; j < RETRO_PSX_MAP_LEN; j++)
                        if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, j))