Core/Movie: Use fmt where applicable

In a few cases we needed to alter... less than ideal parameter types.
While u8 may have been OK with printf-style formatting, which promotes
most smaller types back to int, this won't work with fmt. fmt preserves
the type of the passed in arguments, meaning that u8, being an alias of
uint8_t (itself being an alias of unsigned char on all the platforms we
support), will print out as a character, not a numeric value.

As such, we amend some functions to operate on u32 values for two
reasons:

1. We actually want it to print out as a value
2. Arithmetic on unsigned types smaller than unsigned int will actually promote to an int,
   not unsigned int. This is very non-obvious to some and makes for
   error-prone code. < sizeof(int) types are great for storage, not so
   much for performing unsigned arithmetic, despite the signedness of
   the type.

Source/Core/Core/Movie.cpp

@@ -19,6 +19,8 @@
 #include <variant>
 #include <vector>
 
+#include <fmt/format.h>
+
 #include "Common/Assert.h"
 #include "Common/ChunkFile.h"
 #include "Common/CommonPaths.h"
@@ -553,61 +555,49 @@ bool BeginRecordingInput(int controllers)
   return true;
 }
 
-static std::string Analog2DToString(u8 x, u8 y, const std::string& prefix, u8 range = 255)
+static std::string Analog2DToString(u32 x, u32 y, const std::string& prefix, u32 range = 255)
 {
-  u8 center = range / 2 + 1;
+  const u32 center = range / 2 + 1;
+
   if ((x <= 1 || x == center || x >= range) && (y <= 1 || y == center || y >= range))
   {
     if (x != center || y != center)
     {
       if (x != center && y != center)
       {
-        return StringFromFormat("%s:%s,%s", prefix.c_str(), x < center ? "LEFT" : "RIGHT",
+        return fmt::format("{}:{},{}", prefix, x < center ? "LEFT" : "RIGHT",
                            y < center ? "DOWN" : "UP");
       }
-      else if (x != center)
+
+      if (x != center)
       {
-        return StringFromFormat("%s:%s", prefix.c_str(), x < center ? "LEFT" : "RIGHT");
+        return fmt::format("{}:{}", prefix, x < center ? "LEFT" : "RIGHT");
       }
-      else
+
-      {
+      return fmt::format("{}:{}", prefix, y < center ? "DOWN" : "UP");
-        return StringFromFormat("%s:%s", prefix.c_str(), y < center ? "DOWN" : "UP");
     }
-    }
+
-    else
-    {
     return "";
   }
-  }
+
-  else
+  return fmt::format("{}:{},{}", prefix, x, y);
-  {
-    return StringFromFormat("%s:%d,%d", prefix.c_str(), x, y);
-  }
 }
 
-static std::string Analog1DToString(u8 v, const std::string& prefix, u8 range = 255)
+static std::string Analog1DToString(u32 v, const std::string& prefix, u32 range = 255)
 {
-  if (v > 0)
+  if (v == 0)
-  {
-    if (v == range)
-    {
-      return prefix;
-    }
-    else
-    {
-      return StringFromFormat("%s:%d", prefix.c_str(), v);
-    }
-  }
-  else
-  {
     return "";
-  }
+
+  if (v == range)
+    return prefix;
+
+  return fmt::format("{}:{}", prefix, v);
 }
 
 // NOTE: CPU Thread
 static void SetInputDisplayString(ControllerState padState, int controllerID)
 {
-  std::string display_str = StringFromFormat("P%d:", controllerID + 1);
+  std::string display_str = fmt::format("P{}:", controllerID + 1);
 
   if (padState.is_connected)
   {
@@ -655,7 +645,7 @@ static void SetWiiInputDisplayString(int remoteID, const DataReportBuilder& rpt,
 {
   int controllerID = remoteID + 4;
 
-  std::string display_str = StringFromFormat("R%d:", remoteID + 1);
+  std::string display_str = fmt::format("R{}:", remoteID + 1);
 
   if (rpt.HasCore())
   {
@@ -693,18 +683,18 @@ static void SetWiiInputDisplayString(int remoteID, const DataReportBuilder& rpt,
 
     // FYI: This will only print partial data for interleaved reports.
 
-    display_str += StringFromFormat(" ACC:%d,%d,%d", accel_data.x, accel_data.y, accel_data.z);
+    display_str += fmt::format(" ACC:{},{},{}", accel_data.x, accel_data.y, accel_data.z);
   }
 
   if (rpt.HasIR())
   {
-    const u8* const irData = rpt.GetIRDataPtr();
+    const u8* const ir_data = rpt.GetIRDataPtr();
 
     // TODO: This does not handle the different IR formats.
 
-    u16 x = irData[0] | ((irData[2] >> 4 & 0x3) << 8);
+    const u16 x = ir_data[0] | ((ir_data[2] >> 4 & 0x3) << 8);
-    u16 y = irData[1] | ((irData[2] >> 6 & 0x3) << 8);
+    const u16 y = ir_data[1] | ((ir_data[2] >> 6 & 0x3) << 8);
-    display_str += StringFromFormat(" IR:%d,%d", x, y);
+    display_str += fmt::format(" IR:{},{}", x, y);
   }
 
   // Nunchuk
@@ -717,8 +707,8 @@ static void SetWiiInputDisplayString(int remoteID, const DataReportBuilder& rpt,
     key.Decrypt((u8*)&nunchuk, 0, sizeof(nunchuk));
     nunchuk.bt.hex = nunchuk.bt.hex ^ 0x3;
 
-    std::string accel = StringFromFormat(
+    const std::string accel = fmt::format(
-        " N-ACC:%d,%d,%d", (nunchuk.ax << 2) | nunchuk.bt.acc_x_lsb,
+        " N-ACC:{},{},{}", (nunchuk.ax << 2) | nunchuk.bt.acc_x_lsb,
         (nunchuk.ay << 2) | nunchuk.bt.acc_y_lsb, (nunchuk.az << 2) | nunchuk.bt.acc_z_lsb);
 
     if (nunchuk.bt.c)
@@ -1345,9 +1335,9 @@ void SaveRecording(const std::string& filename)
   }
 
   if (success)
-    Core::DisplayMessage(StringFromFormat("DTM %s saved", filename.c_str()), 2000);
+    Core::DisplayMessage(fmt::format("DTM {} saved", filename), 2000);
   else
-    Core::DisplayMessage(StringFromFormat("Failed to save %s", filename.c_str()), 2000);
+    Core::DisplayMessage(fmt::format("Failed to save {}", filename), 2000);
 }
 
 void SetGCInputManip(GCManipFunction func)