libobs/util: Add function to get Rosetta translation status

docs/sphinx/reference-libobs-util-platform.rst

@@ -478,3 +478,12 @@ Other Functions
 .. function:: uint64_t os_get_proc_virtual_size(void)
 
    Returns the virtual memory size of the current process.
+
+---------------------
+
+.. function:: bool os_get_emulation_status(void)
+
+   Returns true if the current process is a x64 binary and is being emulated or translated
+   by the host operating system. On macOS, it returns true when a x64 binary is 
+   being translated by Rosetta and running on Apple Silicon Macs. This function is not yet
+   implemented on Windows and Linux and will always return false on those platforms.

libobs/util/platform-cocoa.m

@@ -319,6 +319,21 @@ static int physical_cores = 0;
 static int logical_cores = 0;
 static bool core_count_initialized = false;
 
+bool os_get_emulation_status(void)
+{
+#ifdef __aarch64__
+	return false;
+#else
+	int rosettaTranslated = 0;
+	size_t size = sizeof(rosettaTranslated);
+	if (sysctlbyname("sysctl.proc_translated", &rosettaTranslated, &size,
+			 NULL, 0) == -1)
+		return false;
+
+	return rosettaTranslated == 1;
+#endif
+}
+
 static void os_get_cores_internal(void)
 {
 	if (core_count_initialized)

libobs/util/platform-nix.c

@@ -401,6 +401,11 @@ char *os_get_executable_path_ptr(const char *name)
 	return path.array;
 }
 
+bool os_get_emulation_status(void)
+{
+	return false;
+}
+
 #endif
 
 bool os_file_exists(const char *path)

libobs/util/platform-windows.c

@@ -992,6 +992,11 @@ bool is_64_bit_windows(void)
 #endif
 }
 
+bool os_get_emulation_status(void)
+{
+	return false;
+}
+
 void get_reg_dword(HKEY hkey, LPCWSTR sub_key, LPCWSTR value_name,
 		   struct reg_dword *info)
 {

libobs/util/platform.h

@@ -123,6 +123,8 @@ EXPORT char *os_get_abs_path_ptr(const char *path);
 
 EXPORT const char *os_get_path_extension(const char *path);
 
+EXPORT bool os_get_emulation_status(void);
+
 struct os_dir;
 typedef struct os_dir os_dir_t;