(MMDevice) Changes:

* Add mmdevice_samplerate
* _WIN32_WINNT checks will fail on modern MSYS2/MIngw-w64 setups (Win10/11) -
_WINN32_WINNT will be 0x0601 (1537) - i.e. Win7 and up. We can assume MMDevice
is available since Vista, so lower these checks to Vista and up

audio/common/mmdevice_common.c

@@ -108,6 +108,45 @@ const char *mmdevice_hresult_name(int hr)
    return "<unknown>";
 }
 
+size_t mmdevice_samplerate(void *data)
+{
+   HRESULT hr;
+   PWAVEFORMATEX devfmt_props;
+   PROPVARIANT prop_var;
+   IMMDevice *device          = (IMMDevice*)data;
+   IPropertyStore *prop_store = NULL;
+   DWORD result               = 0;
+
+   if (!device)
+      return 0;
+
+   hr = _IMMDevice_OpenPropertyStore(device,
+         STGM_READ, &prop_store);
+
+   if (FAILED(hr))
+      return 0;
+
+   PropVariantInit(&prop_var);
+   hr = _IPropertyStore_GetValue(prop_store,
+         PKEY_AudioEngine_DeviceFormat, &prop_var);
+   if (SUCCEEDED(hr))
+   {
+      devfmt_props = (PWAVEFORMATEX)prop_var.blob.pBlobData;
+      result       = devfmt_props->nSamplesPerSec;
+   }
+
+   PropVariantClear(&prop_var);
+   if (prop_store)
+   {
+#ifdef __cplusplus
+      prop_store->Release();
+#else
+      prop_store->lpVtbl->Release(prop_store);
+#endif
+      prop_store = NULL;
+   }
+   return (size_t)result;
+}
 
 char *mmdevice_name(void *data)
 {

audio/common/mmdevice_common.h

@@ -30,8 +30,14 @@ void *mmdevice_list_new(const void *u, unsigned data_flow);
  */
 char* mmdevice_name(void *data);
 
+/**
+ * Gets the samplerate of the provided IMMDevice.
+ */
+size_t mmdevice_samplerate(void *data);
+
 const char *mmdevice_hresult_name(int hr);
 
+
 void *mmdevice_init_device(const char *id, unsigned data_flow);
 
 RETRO_END_DECLS

audio/common/mmdevice_common_inline.h

@@ -18,7 +18,7 @@
 
 #include <stdlib.h>
 
-/* Fix for MSYS2 increasing _WIN32_WINNT to 0x0603*/
+/* Fix for MSYS2 increasing _WIN32_WINNT to 0x0603 */
 #if defined(__MINGW32__) || defined(__MINGW64__)
 #define WIN32_LEAN_AND_MEAN
 #endif

audio/drivers/xaudio.c

@@ -38,7 +38,13 @@
 
 #include "xaudio.h"
 
-#if (_WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/)
+#if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600 /*_WIN32_WINNT_VISTA */)
+#ifndef HAVE_MMDEVICE
+#define HAVE_MMDEVICE
+#endif
+#endif
+
+#ifdef HAVE_MMDEVICE
 #include "../common/mmdevice_common.h"
 #endif
 
@@ -265,29 +271,27 @@ static xaudio2_t *xaudio2_new(unsigned *rate, unsigned channels,
       /* Search for device name first */
       if (list && list->elems)
       {
-         if (list->elems)
+         /* If any devices were found... */
+         size_t i;
+         for (i = 0; i < list->size; i++)
          {
-            /* If any devices were found... */
-            size_t i;
-            for (i = 0; i < list->size; i++)
+            if (string_is_equal(dev_id, list->elems[i].data))
             {
-               if (string_is_equal(dev_id, list->elems[i].data))
-               {
-                  RARCH_DBG("[XAudio2] Found device #%d: \"%s\".\n", i, list->elems[i].data);
-                  idx_found       = i;
-                  break;
-               }
+               RARCH_DBG("[XAudio2] Found device #%d: \"%s\".\n", i,
+                     list->elems[i].data);
+               idx_found       = i;
+               break;
             }
+         }
 
-            /* Index was not found yet based on name string,
-             * just assume id is a one-character number index. */
-            if (idx_found == -1)
+         /* Index was not found yet based on name string,
+          * just assume id is a one-character number index. */
+         if (idx_found == -1)
+         {
+            if (isdigit(dev_id[0]))
             {
-               if (isdigit(dev_id[0]))
-               {
-                  idx_found = strtoul(dev_id, NULL, 0);
-                  RARCH_LOG("[XAudio2] Fallback, device index is a single number index instead: %d.\n", idx_found);
-               }
+               idx_found = strtoul(dev_id, NULL, 0);
+               RARCH_LOG("[XAudio2] Fallback, device index is a single number index instead: %d.\n", idx_found);
             }
          }
       }
@@ -521,7 +525,7 @@ static void xa_device_list_free(void *u, void *slp)
 
 static void *xa_list_new(void *u)
 {
-#if defined(_XBOX) || !(_WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/)
+#if defined(_XBOX) || !defined(HAVE_MMDEVICE)
    unsigned i;
    union string_list_elem_attr attr;
    uint32_t dev_count              = 0;