From 8ed168b7d07cb9596ba65ad6dd95988d3f1cc95a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pedro=20L=C3=B3pez-Cabanillas?= <plcl@users.sourceforge.net>
Date: Sun, 3 Nov 2024 14:10:11 +0100
Subject: [PATCH] workaround for libsndfile not handling utf8 file names on
 Windows

---
 src/bindings/fluid_filerenderer.c | 38 +++++++++++++++++++++++++++++--
 test/test_fast_render.c           |  2 --
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/src/bindings/fluid_filerenderer.c b/src/bindings/fluid_filerenderer.c
index 401daadb4..d17373996 100644
--- a/src/bindings/fluid_filerenderer.c
+++ b/src/bindings/fluid_filerenderer.c
@@ -288,9 +288,43 @@ new_fluid_file_renderer(fluid_synth_t *synth)
         FLUID_LOG(FLUID_ERR, "Invalid or unsupported audio file format settings");
         goto error_recovery;
     }
-
+    
+#ifdef _WIN32
+    if (0 == FLUID_STRCMP("-", filename))
+    {
+        dev->sndfile = sf_open(filename, SFM_WRITE, &info);
+    }
+    else
+    {
+        int u16_count;
+        LPWSTR wc_filename;
+        dev->sndfile = NULL;
+        
+               // utf-8 filename to utf-16 wc_filename
+        if (1 > (u16_count = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename, -1, NULL, 0)))
+        {
+            FLUID_LOG(FLUID_ERR, "Failed to convert UTF8 string to wide char string");
+        }
+        else if (NULL == (wc_filename = (LPWSTR)FLUID_ARRAY(WCHAR, u16_count)))
+        {
+            FLUID_LOG(FLUID_ERR, "Out of memory");
+        }
+        else
+        {
+            if (u16_count != MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename, -1, wc_filename, u16_count))
+            {
+                FLUID_LOG(FLUID_ERR, "Failed to convert UTF8 string to wide char string");
+            }
+            else
+            {
+                dev->sndfile = sf_wchar_open(wc_filename, SFM_WRITE, &info);
+            }
+            FLUID_FREE(wc_filename);
+        }
+    }
+#else
     dev->sndfile = sf_open(filename, SFM_WRITE, &info);
-
+#endif
     if(!dev->sndfile)
     {
         FLUID_LOG(FLUID_ERR, "Failed to open audio file '%s' for writing", filename);
diff --git a/test/test_fast_render.c b/test/test_fast_render.c
index c6b0ecaca..9772f12f0 100644
--- a/test/test_fast_render.c
+++ b/test/test_fast_render.c
@@ -51,12 +51,10 @@ int main(void)
     delete_fluid_synth(synth);
     delete_fluid_settings(settings);
     
-#if 0    
     FILE *file;
     file = FLUID_FOPEN(TEST_WAV_UTF8, "rb");
     TEST_ASSERT(file != NULL);
     TEST_ASSERT(FLUID_FCLOSE(file) == 0);
-#endif
     
     return EXIT_SUCCESS;
 }