Fix MSVC warnings C4324, C4389, C4456, and C4459

Part of #66537.

4 files changed, 103 insertions, 7 deletions

diff --git a/thirdparty/README.md b/thirdparty/README.md
index b5775db38a..ac97d9c2a2 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -378,8 +378,8 @@ Files extracted from upstream repository:
 - `minimp3_ex.h`
 - `LICENSE`
 
-Some changes have been made in order to fix Windows on ARM build errors.
-They are marked with `// -- GODOT start --` and `// -- GODOT end --`
+Some changes have been made in order to fix Windows on ARM build errors, and
+to solve some MSVC warnings. See the patches in the `patches` directory.
 
 
 ## miniupnpc
diff --git a/thirdparty/minimp3/minimp3_ex.h b/thirdparty/minimp3/minimp3_ex.h
index 2871705df3..2b207a25a7 100644
--- a/thirdparty/minimp3/minimp3_ex.h
+++ b/thirdparty/minimp3/minimp3_ex.h
@@ -377,7 +377,7 @@ int mp3dec_load_cb(mp3dec_t *dec, mp3dec_io_t *io, uint8_t *buf, size_t buf_size
         samples = hdr_frame_samples(hdr)*frame_info.channels;
         if (3 != frame_info.layer)
             break;
-        int ret = mp3dec_check_vbrtag(hdr, frame_size, &frames, &delay, &padding);
+        ret = mp3dec_check_vbrtag(hdr, frame_size, &frames, &delay, &padding);
         if (ret > 0)
         {
             padding *= frame_info.channels;
@@ -529,7 +529,8 @@ int mp3dec_iterate_buf(const uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB call
 
         if (callback)
         {
-            if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, buf_size, hdr - orig_buf, &frame_info)))
+            ret = callback(user_data, hdr, frame_size, free_format_bytes, buf_size, hdr - orig_buf, &frame_info);
+            if (ret != 0)
                 return ret;
         }
         buf      += frame_size;
@@ -562,7 +563,7 @@ int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERA
         readed += id3v2size;
     } else
     {
-        size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
+        readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
         if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
             return MP3D_E_IOERROR;
         filled += readed;
@@ -590,7 +591,8 @@ int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERA
         readed += i;
         if (callback)
         {
-            if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, filled - consumed, readed, &frame_info)))
+            ret = callback(user_data, hdr, frame_size, free_format_bytes, filled - consumed, readed, &frame_info);
+            if (ret != 0)
                 return ret;
         }
         readed += frame_size;
@@ -600,7 +602,7 @@ int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERA
             memmove(buf, buf + consumed, filled - consumed);
             filled -= consumed;
             consumed = 0;
-            size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
+            readed = io->read(buf + filled, buf_size - filled, io->read_data);
             if (readed > (buf_size - filled))
                 return MP3D_E_IOERROR;
             if (readed != (buf_size - filled))
diff --git a/thirdparty/minimp3/patches/msvc-arm-fix.patch b/thirdparty/minimp3/patches/msvc-arm-fix.patch
new file mode 100644
index 0000000000..bca915aceb
--- /dev/null
+++ b/thirdparty/minimp3/patches/msvc-arm-fix.patch
@@ -0,0 +1,43 @@
+diff --git a/thirdparty/minimp3/minimp3.h b/thirdparty/minimp3/minimp3.h
+index 3220ae1a85..2a9975cc86 100644
+--- a/thirdparty/minimp3/minimp3.h
++++ b/thirdparty/minimp3/minimp3.h
+@@ -1566,7 +1566,18 @@ static void mp3d_synth(float *xl, mp3d_sample_t *dstl, int nch, float *lins)
+ 
+ #else /* MINIMP3_FLOAT_OUTPUT */
+ 
++// -- GODOT start --
++#if defined(_MSC_VER) && (defined(_M_ARM64) || defined(_M_ARM64EC) || defined(_M_ARM))
++            static f4 g_scale;
++            g_scale = vsetq_lane_f32(1.0f/32768.0f, g_scale, 0);
++            g_scale = vsetq_lane_f32(1.0f/32768.0f, g_scale, 1);
++            g_scale = vsetq_lane_f32(1.0f/32768.0f, g_scale, 2);
++            g_scale = vsetq_lane_f32(1.0f/32768.0f, g_scale, 3);
++#else
+             static const f4 g_scale = { 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f };
++#endif
++// -- GODOT end --
++
+             a = VMUL(a, g_scale);
+             b = VMUL(b, g_scale);
+ #if HAVE_SSE
+@@ -1813,7 +1824,19 @@ void mp3dec_f32_to_s16(const float *in, int16_t *out, int num_samples)
+     int aligned_count = num_samples & ~7;
+     for(; i < aligned_count; i += 8)
+     {
++
++// -- GODOT start --
++#if defined(_MSC_VER) && (defined(_M_ARM64) || defined(_M_ARM64EC) || defined(_M_ARM))
++            static f4 g_scale;
++            g_scale = vsetq_lane_f32(32768.0f, g_scale, 0);
++            g_scale = vsetq_lane_f32(32768.0f, g_scale, 1);
++            g_scale = vsetq_lane_f32(32768.0f, g_scale, 2);
++            g_scale = vsetq_lane_f32(32768.0f, g_scale, 3);
++#else
+         static const f4 g_scale = { 32768.0f, 32768.0f, 32768.0f, 32768.0f };
++#endif
++// -- GODOT end --
++
+         f4 a = VMUL(VLD(&in[i  ]), g_scale);
+         f4 b = VMUL(VLD(&in[i+4]), g_scale);
+ #if HAVE_SSE
diff --git a/thirdparty/minimp3/patches/msvc-warnings-fixes.patch b/thirdparty/minimp3/patches/msvc-warnings-fixes.patch
new file mode 100644
index 0000000000..d186d6c6f7
--- /dev/null
+++ b/thirdparty/minimp3/patches/msvc-warnings-fixes.patch
@@ -0,0 +1,51 @@
+diff --git a/thirdparty/minimp3/minimp3_ex.h b/thirdparty/minimp3/minimp3_ex.h
+index 2871705df3..2b207a25a7 100644
+--- a/thirdparty/minimp3/minimp3_ex.h
++++ b/thirdparty/minimp3/minimp3_ex.h
+@@ -377,7 +377,7 @@ int mp3dec_load_cb(mp3dec_t *dec, mp3dec_io_t *io, uint8_t *buf, size_t buf_size
+         samples = hdr_frame_samples(hdr)*frame_info.channels;
+         if (3 != frame_info.layer)
+             break;
+-        int ret = mp3dec_check_vbrtag(hdr, frame_size, &frames, &delay, &padding);
++        ret = mp3dec_check_vbrtag(hdr, frame_size, &frames, &delay, &padding);
+         if (ret > 0)
+         {
+             padding *= frame_info.channels;
+@@ -529,7 +529,8 @@ int mp3dec_iterate_buf(const uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB call
+ 
+         if (callback)
+         {
+-            if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, buf_size, hdr - orig_buf, &frame_info)))
++            ret = callback(user_data, hdr, frame_size, free_format_bytes, buf_size, hdr - orig_buf, &frame_info);
++            if (ret != 0)
+                 return ret;
+         }
+         buf      += frame_size;
+@@ -562,7 +563,7 @@ int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERA
+         readed += id3v2size;
+     } else
+     {
+-        size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
++        readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
+         if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
+             return MP3D_E_IOERROR;
+         filled += readed;
+@@ -590,7 +591,8 @@ int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERA
+         readed += i;
+         if (callback)
+         {
+-            if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, filled - consumed, readed, &frame_info)))
++            ret = callback(user_data, hdr, frame_size, free_format_bytes, filled - consumed, readed, &frame_info);
++            if (ret != 0)
+                 return ret;
+         }
+         readed += frame_size;
+@@ -600,7 +602,7 @@ int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERA
+             memmove(buf, buf + consumed, filled - consumed);
+             filled -= consumed;
+             consumed = 0;
+-            size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
++            readed = io->read(buf + filled, buf_size - filled, io->read_data);
+             if (readed > (buf_size - filled))
+                 return MP3D_E_IOERROR;
+             if (readed != (buf_size - filled))