From 7ef86523265d10d9eabc05901194a4b4a5a0615b Mon Sep 17 00:00:00 2001
From: Yu Qing <tsingakbar@gmail.com>
Date: Sun, 3 Oct 2021 18:15:57 +0800
Subject: [PATCH] fix windows related encoding problems (#984)

---
 src/drivers/fluid_wasapi.c |  8 +++---
 src/fluidsynth.c           | 59 ++++++++++++++++++++++++++++++++++++--
 2 files changed, 60 insertions(+), 7 deletions(-)

diff --git a/src/drivers/fluid_wasapi.c b/src/drivers/fluid_wasapi.c
index 3ff91d4b..7fc82098 100644
--- a/src/drivers/fluid_wasapi.c
+++ b/src/drivers/fluid_wasapi.c
@@ -788,9 +788,9 @@ static void fluid_wasapi_register_callback(IMMDevice *dev, void *data)
         int nsz;
         char *name;
 
-        nsz = WideCharToMultiByte(CP_UTF8, 0, var.pwszVal, -1, 0, 0, 0, 0);
+        nsz = WideCharToMultiByte(CP_ACP, 0, var.pwszVal, -1, 0, 0, 0, 0);
         name = FLUID_ARRAY(char, nsz + 1);
-        WideCharToMultiByte(CP_UTF8, 0, var.pwszVal, -1, name, nsz, 0, 0);
+        WideCharToMultiByte(CP_ACP, 0, var.pwszVal, -1, name, nsz, 0, 0);
         fluid_settings_add_option(settings, "audio.wasapi.device", name);
         FLUID_FREE(name);
     }
@@ -827,9 +827,9 @@ static void fluid_wasapi_finddev_callback(IMMDevice *dev, void *data)
         goto cleanup;
     }
 
-    nsz = WideCharToMultiByte(CP_UTF8, 0, var.pwszVal, -1, 0, 0, 0, 0);
+    nsz = WideCharToMultiByte(CP_ACP, 0, var.pwszVal, -1, 0, 0, 0, 0);
     name = FLUID_ARRAY(char, nsz + 1);
-    WideCharToMultiByte(CP_UTF8, 0, var.pwszVal, -1, name, nsz, 0, 0);
+    WideCharToMultiByte(CP_ACP, 0, var.pwszVal, -1, name, nsz, 0, 0);
 
     if(!FLUID_STRCASECMP(name, d->name))
     {
diff --git a/src/fluidsynth.c b/src/fluidsynth.c
index 6c1132f4..4661cbe0 100644
--- a/src/fluidsynth.c
+++ b/src/fluidsynth.c
@@ -156,6 +156,45 @@ print_pretty_int(int i)
     }
 }
 
+#ifdef WIN32
+/* Function using win32 api to convert ANSI encoding string to UTF8 encoding string */
+static char*
+win32_ansi_to_utf8(const char* ansi_null_terminated_string)
+{
+    LPWSTR u16_buf = NULL;
+    char *u8_buf = NULL;
+    fluid_return_val_if_fail(ansi_null_terminated_string != NULL, NULL);
+    do
+    {
+        int u16_count, u8_byte_count;
+        u16_count = MultiByteToWideChar(CP_ACP, 0, ansi_null_terminated_string, -1, NULL, 0);
+        if (u16_count == 0)
+        {
+            fprintf(stderr, "Failed to convert ANSI string to wide char string\n");
+            break;
+        }
+        u16_buf = malloc(u16_count * sizeof(WCHAR));
+        if (u16_buf == NULL)
+        {
+            fprintf(stderr, "Out of memory\n");
+            break;
+        }
+        u16_count = MultiByteToWideChar(CP_ACP, 0, ansi_null_terminated_string, -1, u16_buf, u16_count);
+        u8_byte_count = WideCharToMultiByte(CP_UTF8, 0, u16_buf, u16_count, NULL, 0, NULL, NULL);
+
+        u8_buf = malloc(u8_byte_count);
+        if (u8_buf == NULL)
+        {
+            fprintf(stderr, "Out of memory\n");
+            break;
+        }
+        WideCharToMultiByte(CP_UTF8, 0, u16_buf, u16_count, u8_buf, u8_byte_count, NULL, NULL);
+    } while (0);
+    free(u16_buf);
+    return u8_buf;
+}
+#endif
+
 typedef struct
 {
     int count;            /* Total count of options */
@@ -896,14 +935,25 @@ int main(int argc, char **argv)
     /* load the soundfonts (check that all non options are SoundFont or MIDI files) */
     for(i = arg1; i < argc; i++)
     {
-        if(fluid_is_midifile(argv[i]))
+        const char *u8_path = argv[i];
+#if defined(WIN32)
+        /* try to convert ANSI encoding path to UTF8 encoding path */
+        char *u8_buf = win32_ansi_to_utf8(argv[i]);
+        if (u8_buf == NULL)
+        {
+            // error msg. already printed
+            goto cleanup;
+        }
+        u8_path = u8_buf;
+#endif
+        if(fluid_is_midifile(u8_path))
         {
             continue;
         }
 
-        if(fluid_is_soundfont(argv[i]))
+        if(fluid_is_soundfont(u8_path))
         {
-            if(fluid_synth_sfload(synth, argv[i], 1) == -1)
+            if(fluid_synth_sfload(synth, u8_path, 1) == -1)
             {
                 fprintf(stderr, "Failed to load the SoundFont %s\n", argv[i]);
             }
@@ -912,6 +962,9 @@ int main(int argc, char **argv)
         {
             fprintf(stderr, "Parameter '%s' not a SoundFont or MIDI file or error occurred identifying it.\n", argv[i]);
         }
+#if defined(WIN32)
+        free(u8_buf);
+#endif
     }
 
     /* Try to load the default soundfont, if no soundfont specified */