Merge pull request 'Include chu2to3 engine' (#1) from CrazyRedMachine/segatools:chuniio into chuniio

Reviewed-on: Dniel97/segatools#1

chunihook/dllmain.c

@@ -97,11 +97,16 @@ static DWORD CALLBACK chuni_pre_startup(void)
         goto fail;
     }
 
-    hr = led15093_hook_init(&chuni_hook_cfg.led15093, 
+    if ( chuni_dll.led_init == NULL || chuni_dll.led_set_leds == NULL )
-        chuni_dll.led_init, chuni_dll.led_set_leds, 10, 2, 2, 1);
+    {
+        dprintf("IO DLL doesn't support led_init/led_set_leds, cannot start LED15093 hook\n");
+    } else {
+        hr = led15093_hook_init(&chuni_hook_cfg.led15093, 
+            chuni_dll.led_init, chuni_dll.led_set_leds, 10, 2, 2, 1);
 
-    if (FAILED(hr)) {
+        if (FAILED(hr)) {
-        goto fail;
+            goto fail;
+        }
     }
 
     hr = sg_reader_hook_init(&chuni_hook_cfg.aime, 12, 1, chuni_hook_mod);

chuniio/chu2to3.c

@@ -0,0 +1,357 @@
+#include <windows.h>
+
+#include <process.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "chuniio/chu2to3.h"
+#include "util/dprintf.h"
+
+// Check windows
+#if _WIN32 || _WIN64
+    #if _WIN64
+        #define ENV64BIT
+    #else
+        #define ENV32BIT
+    #endif
+#endif
+
+// Check GCC
+#if __GNUC__
+    #if __x86_64__ || __ppc64__
+        #define ENV64BIT
+    #else
+        #define ENV32BIT
+    #endif
+#endif
+
+/* chuniio.dll dynamic loading */
+HMODULE hinstLib;
+typedef uint16_t (*chuni_io_get_api_version_t)(void);
+typedef HRESULT (*chuni_io_jvs_init_t)(void);
+typedef void (*chuni_io_jvs_poll_t)(uint8_t*, uint8_t*);
+typedef void (*chuni_io_jvs_read_coin_counter_t)(uint16_t *);
+typedef HRESULT (*chuni_io_slider_init_t)(void);
+typedef void (*chuni_io_slider_set_leds_t)(const uint8_t *);
+typedef void (*chuni_io_slider_start_t)(chuni_io_slider_callback_t);
+typedef void (*chuni_io_slider_stop_t)(void);
+typedef HRESULT (*chuni_io_led_init_t)(void);
+typedef void (*chuni_io_led_set_colors_t)(uint8_t, uint8_t *);
+
+chuni_io_get_api_version_t _chuni_io_get_api_version;
+chuni_io_jvs_init_t _chuni_io_jvs_init;
+chuni_io_jvs_poll_t _chuni_io_jvs_poll;
+chuni_io_jvs_read_coin_counter_t _chuni_io_jvs_read_coin_counter;
+chuni_io_slider_init_t _chuni_io_slider_init;
+chuni_io_slider_set_leds_t _chuni_io_slider_set_leds;
+chuni_io_slider_start_t _chuni_io_slider_start;
+chuni_io_slider_stop_t _chuni_io_slider_stop;
+chuni_io_led_init_t _chuni_io_led_init;
+chuni_io_led_set_colors_t _chuni_io_led_set_colors;
+
+/* SHMEM Handling */
+#define BUF_SIZE 1024
+#define SHMEM_WRITE(buf, size) CopyMemory((PVOID)g_pBuf, buf, size)
+#define SHMEM_READ(buf, size) CopyMemory(buf,(PVOID)g_pBuf, size)
+TCHAR g_shmem_name[]=TEXT("Local\\Chu2to3Shmem");
+HANDLE g_hMapFile;
+LPVOID g_pBuf;
+
+#pragma pack(1)
+typedef struct shared_data_s {
+    uint16_t coin_counter;
+    uint8_t  opbtn;
+    uint8_t  beams;
+    uint16_t version;
+} shared_data_t;
+
+shared_data_t g_shared_data;
+
+bool shmem_create()
+{
+   g_hMapFile = CreateFileMapping(
+                                  INVALID_HANDLE_VALUE,    // use paging file
+                                  NULL,                    // default security
+                                  PAGE_READWRITE,          // read/write access
+                                  0,                       // maximum object size (high-order DWORD)
+                                  BUF_SIZE,                // maximum object size (low-order DWORD)
+                                  g_shmem_name);           // name of mapping object
+
+   if (g_hMapFile == NULL)
+   {
+      dprintf("shmem_create : Could not create file mapping object (%d).\n",
+             GetLastError());
+      return 0;
+   }
+   g_pBuf = MapViewOfFile(g_hMapFile,          // handle to map object
+                          FILE_MAP_ALL_ACCESS, // read/write permission
+                          0,
+                          0,
+                          BUF_SIZE);
+
+   if (g_pBuf == NULL)
+   {
+      dprintf("shmem_create : Could not map view of file (%d).\n",
+             GetLastError());
+
+       CloseHandle(g_hMapFile);
+
+      return 0;
+   }
+
+    return 1;
+}
+
+bool shmem_load()
+{
+    g_hMapFile = OpenFileMapping(
+                                 FILE_MAP_ALL_ACCESS,   // read/write access
+                                 FALSE,                 // do not inherit the name
+                                 g_shmem_name);         // name of mapping object
+
+    if (g_hMapFile == NULL)
+    {
+        dprintf("shmem_load : Could not open file mapping object (%d).\n", GetLastError());
+        return 0;
+   }
+
+    g_pBuf = MapViewOfFile(g_hMapFile,           // handle to map object
+                           FILE_MAP_ALL_ACCESS,  // read/write permission
+                           0,
+                           0,
+                           BUF_SIZE);
+
+    if (g_pBuf == NULL)
+    {
+        dprintf("shmem_load : Could not map view of file (%d).\n", GetLastError());
+        CloseHandle(g_hMapFile);
+        return 0;
+    }
+
+    dprintf("shmem_load : shmem loaded succesfully.\n");
+    return 1;
+}
+
+void shmem_free()
+{
+   UnmapViewOfFile(g_pBuf);
+   CloseHandle(g_hMapFile);
+}
+
+/* jvs polling thread (to forward info to x64 dll) */
+static HANDLE jvs_poll_thread;
+static bool jvs_poll_stop_flag;
+
+static unsigned int __stdcall jvs_poll_thread_proc(void *ctx)
+{
+    while (1) {
+        _chuni_io_jvs_read_coin_counter(&g_shared_data.coin_counter);
+        g_shared_data.opbtn = 0;
+        _chuni_io_jvs_poll(&g_shared_data.opbtn, &g_shared_data.beams);
+        SHMEM_WRITE(&g_shared_data, sizeof(shared_data_t));
+        Sleep(1);
+    }
+
+    return 0;
+}
+
+uint16_t chu2to3_load_dll(wchar_t *dllname)
+{
+    #if defined(ENV64BIT)
+    /* x64 must just open the shmem and do nothing else */
+    int errcount = 0;
+    while (!shmem_load())
+    {
+        if (errcount >= 10)
+            return -1;
+        Sleep(5000);
+        errcount++;
+    }
+    Sleep(1000);
+    return S_OK;
+    #endif
+
+    /* this is the first function called so let's setup the chuniio forwarding */
+    hinstLib = LoadLibraryW(dllname);
+    if (hinstLib == NULL) {
+        dprintf("ERROR: unable to load %S (error %d)\n",dllname, GetLastError());
+        return -1;
+    }
+
+    _chuni_io_get_api_version = (chuni_io_get_api_version_t)GetProcAddress(hinstLib, "chuni_io_get_api_version");
+    _chuni_io_jvs_init = (chuni_io_jvs_init_t)GetProcAddress(hinstLib, "chuni_io_jvs_init");
+    _chuni_io_jvs_poll = (chuni_io_jvs_poll_t)GetProcAddress(hinstLib, "chuni_io_jvs_poll");
+    _chuni_io_jvs_read_coin_counter = (chuni_io_jvs_read_coin_counter_t)GetProcAddress(hinstLib, "chuni_io_jvs_read_coin_counter");
+    _chuni_io_slider_init = (chuni_io_slider_init_t)GetProcAddress(hinstLib, "chuni_io_slider_init");
+    _chuni_io_slider_set_leds = (chuni_io_slider_set_leds_t)GetProcAddress(hinstLib, "chuni_io_slider_set_leds");
+    _chuni_io_slider_start = (chuni_io_slider_start_t)GetProcAddress(hinstLib, "chuni_io_slider_start");
+    _chuni_io_slider_stop = (chuni_io_slider_stop_t)GetProcAddress(hinstLib, "chuni_io_slider_stop");
+    _chuni_io_led_init = (chuni_io_led_init_t)GetProcAddress(hinstLib, "chuni_io_led_init");
+    _chuni_io_led_set_colors = (chuni_io_led_set_colors_t)GetProcAddress(hinstLib, "chuni_io_led_set_colors");
+
+    /* x86 has to create the shmem */
+    if (!shmem_create())
+    {
+        return -1;
+    }
+
+    return 0;
+}
+
+/* chuniio exports */
+uint16_t chu2to3_io_get_api_version(void)
+{
+    #if defined(ENV64BIT)
+        /* This might be called too soon so let's make sure x86 has time to write to the shmem */
+        SHMEM_READ(&g_shared_data, sizeof(shared_data_t));
+        int errcount = 0;
+        while (g_shared_data.version == 0)
+        {
+            if (errcount >= 3)
+            {
+                dprintf("CHU2TO3 X64: Couldn't retrieve api version from shmem, assuming 0x0100\n");
+                return 0x0100;
+            }
+            Sleep(5000);
+            errcount++;
+            SHMEM_READ(&g_shared_data, sizeof(shared_data_t));
+        }
+        dprintf("CHU2TO3 X64: api version is %04X\n", g_shared_data.version);
+        return g_shared_data.version;
+    #endif
+
+    if ( _chuni_io_get_api_version == NULL )
+    {
+        g_shared_data.version = 0x0100;
+    }
+    else
+    {
+        g_shared_data.version = _chuni_io_get_api_version();
+    }
+    dprintf("CHU2TO3: api version is %04X\n", g_shared_data.version);
+
+    SHMEM_WRITE(&g_shared_data, sizeof(shared_data_t));
+
+    return g_shared_data.version;
+}
+
+HRESULT chu2to3_io_jvs_init(void)
+{
+    #if defined(ENV64BIT)
+    /* x86 only */
+    return S_OK;
+    #endif
+
+    _chuni_io_jvs_init();
+
+    /* start jvs poll thread now that jvs_init is done */
+    if (jvs_poll_thread != NULL) {
+        return S_OK;
+    }
+
+    jvs_poll_thread = (HANDLE) _beginthreadex(NULL,
+                                              0,
+                                              jvs_poll_thread_proc,
+                                              NULL,
+                                              0,
+                                              NULL);
+    return S_OK;
+}
+
+void chu2to3_io_jvs_read_coin_counter(uint16_t *out)
+{
+    #if defined(ENV32BIT)
+    /* x86 can perform the call and update shmem (although this call never happens) */
+    _chuni_io_jvs_read_coin_counter(&g_shared_data.coin_counter);
+    SHMEM_WRITE(&g_shared_data, sizeof(shared_data_t));
+    return;
+    #endif
+
+    /* x64 must read value from shmem and update arg */
+    SHMEM_READ(&g_shared_data, sizeof(shared_data_t));
+    if (out == NULL) {
+        return;
+    }
+    *out = g_shared_data.coin_counter;
+}
+
+void chu2to3_io_jvs_poll(uint8_t *opbtn, uint8_t *beams)
+{
+    #if defined(ENV32BIT)
+    /* x86 can perform the call and update shmem (although this call never happens) */
+    _chuni_io_jvs_poll(&g_shared_data.opbtn, &g_shared_data.beams);
+    SHMEM_WRITE(&g_shared_data, sizeof(shared_data_t));
+    return;
+    #endif
+
+    /* x64 must read value from shmem and update args */
+    SHMEM_READ(&g_shared_data, sizeof(shared_data_t));
+    *opbtn = g_shared_data.opbtn;
+    *beams = g_shared_data.beams;
+}
+
+HRESULT chu2to3_io_slider_init(void)
+{
+    #if defined(ENV64BIT)
+    /* x86 only */
+    return S_OK;
+    #endif
+
+    return _chuni_io_slider_init();
+}
+
+void chu2to3_io_slider_start(chuni_io_slider_callback_t callback)
+{
+    #if defined(ENV64BIT)
+    /* x86 only */
+    return;
+    #endif
+
+    _chuni_io_slider_start(callback);
+}
+
+void chu2to3_io_slider_stop(void)
+{
+    #if defined(ENV64BIT)
+    /* x86 only */
+    return;
+    #endif
+
+    _chuni_io_slider_stop();
+}
+
+void chu2to3_io_slider_set_leds(const uint8_t *rgb)
+{
+    #if defined(ENV64BIT)
+    /* x86 only */
+    return;
+    #endif
+
+    _chuni_io_slider_set_leds(rgb);
+}
+
+HRESULT chu2to3_io_led_init(void)
+{
+    #if defined(ENV64BIT)
+    /* x86 only */
+    return S_OK;
+    #endif
+
+    if (_chuni_io_led_init != NULL)
+        return _chuni_io_led_init();
+    return S_OK;
+}
+
+void chu2to3_io_led_set_colors(uint8_t board, uint8_t *rgb)
+{
+    #if defined(ENV64BIT)
+    /* x86 only */
+    return;
+    #endif
+
+    if (_chuni_io_led_set_colors != NULL)
+    {
+        _chuni_io_led_set_colors(board, rgb);
+    }
+}

chuniio/chu2to3.h

@@ -0,0 +1,26 @@
+#pragma once
+
+/*
+   CHU2TO3 CUSTOM IO API
+
+   This dll just mirrors chuniio dll binds but with a dynamic library loading and 
+   a SHMEM system to let a single 32bit dll talk with x86 and x64 processes at once
+*/
+
+#include <windows.h>
+
+#include <stdbool.h>
+#include <stdint.h>
+
+uint16_t chu2to3_io_get_api_version(void);
+HRESULT chu2to3_io_jvs_init(void);
+void chu2to3_io_jvs_poll(uint8_t *opbtn, uint8_t *beams);
+void chu2to3_io_jvs_read_coin_counter(uint16_t *total);
+HRESULT chu2to3_io_slider_init(void);
+typedef void (*chuni_io_slider_callback_t)(const uint8_t *state);
+void chu2to3_io_slider_start(chuni_io_slider_callback_t callback);
+void chu2to3_io_slider_stop(void);
+void chu2to3_io_slider_set_leds(const uint8_t *rgb);
+HRESULT chu2to3_io_led_init(void);
+void chu2to3_io_led_set_colors(uint8_t board, uint8_t *rgb);
+uint16_t chu2to3_load_dll(wchar_t *dllname);

chuniio/chuniio.h

@@ -8,6 +8,7 @@
    - 0x0100: Initial API version (assumed if chuni_io_get_api_version is not
      exported)
    - 0x0101: Fix IR beam mappings
+   - 0x0102: Add air tower led and billboard support
 */
 
 #include <windows.h>
@@ -151,15 +152,24 @@ void chuni_io_slider_set_leds(const uint8_t *rgb);
 
    All subsequent calls may originate from arbitrary threads and some may
    overlap with each other. Ensuring synchronization inside your IO DLL is
-   your responsibility. */
+   your responsibility. 
+
+   Minimum API version: 0x0102 */
 
 HRESULT chuni_io_led_init(void);
 
-/* Update the RGB LEDs. rgb is a pointer to an array of 66 * 3 = 198
+/* Update the RGB LEDs. rgb is a pointer to an array of up to 63 * 3 = 189 bytes.
-   bytes. The majority of these are for the marquee display, but the final
+
-   LEDs are for the side partitions.
+   Chunithm uses two chains/boards with WS2811 protocol (each logical led corresponds to 3 physical leds). 
+   board 0 is on the left side and board 1 on the right side of the cab
+
+   left side has 5*10 rgb values for the billboard, followed by 3 rgb values for the air tower
+   right side has 6*10 rgb values for the billboard, followed by 3 rgb values for the air tower
    
-   Chunithm uses two chains/boards. One is on the left side and one on the
+   Each rgb value is comprised of 3 bytes in R,G,B order
-   right side of the cab. Exact layout is TBD. */
+
+   NOTE: billboard strips have alternating direction (bottom to top, top to bottom, ...)
+
+   Minimum API version: 0x0102 */
 
 void chuni_io_led_set_colors(uint8_t board, uint8_t *rgb);

chuniio/meson.build

@@ -5,6 +5,8 @@ chuniio_lib = static_library(
     implicit_include_directories : false,
     c_pch : '../precompiled.h',
     sources : [
+        'chu2to3.c',
+        'chu2to3.h',
         'chuniio.c',
         'chuniio.h',
         'config.c',

chusanhook/chuni-dll.c

@@ -39,6 +39,50 @@ const struct dll_bind_sym chuni_dll_syms[] = {
     }
 };
 
+const struct dll_bind_sym chu2to3_dll_syms[] = {
+    {
+        .sym = "chu2to3_io_jvs_init",
+        .off = offsetof(struct chuni_dll, jvs_init),
+    }, {
+        .sym = "chu2to3_io_jvs_poll",
+        .off = offsetof(struct chuni_dll, jvs_poll),
+    }, {
+        .sym = "chu2to3_io_jvs_read_coin_counter",
+        .off = offsetof(struct chuni_dll, jvs_read_coin_counter),
+    }, {
+        .sym = "chu2to3_io_slider_init",
+        .off = offsetof(struct chuni_dll, slider_init),
+    }, {
+        .sym = "chu2to3_io_slider_start",
+        .off = offsetof(struct chuni_dll, slider_start),
+    }, {
+        .sym = "chu2to3_io_slider_stop",
+        .off = offsetof(struct chuni_dll, slider_stop),
+    }, {
+        .sym = "chu2to3_io_slider_set_leds",
+        .off = offsetof(struct chuni_dll, slider_set_leds),
+    }, {
+        .sym = "chu2to3_io_led_init",
+        .off = offsetof(struct chuni_dll, led_init),
+    }, {
+        .sym = "chu2to3_io_led_set_colors",
+        .off = offsetof(struct chuni_dll, led_set_leds),
+    }
+};
+
+/* Helper function to determine upon dll_bind failure whether the required functions were found
+   NOTE: relies on symbols order declared above */
+static HRESULT has_enough_symbols(uint16_t version, uint8_t count)
+{
+    if ( version <= 0x0101 && count == 7 )
+        return S_OK;
+
+    if ( version >= 0x0102 && count == 9 )
+        return S_OK;
+
+    return E_FAIL;
+}
+
 struct chuni_dll chuni_dll;
 
 // Copypasta DLL binding and diagnostic message boilerplate.
@@ -58,7 +102,12 @@ HRESULT chuni_dll_init(const struct chuni_dll_config *cfg, HINSTANCE self)
     assert(cfg != NULL);
     assert(self != NULL);
 
-    if (cfg->path[0] != L'\0') {
+    owned = NULL;
+    src = self;
+
+    if (cfg->chu2to3) {
+        dprintf("Chunithm IO: using chu2to3 engine for IO DLL: %S\n", cfg->path);
+	} else if (cfg->path[0] != L'\0') {
         owned = LoadLibraryW(cfg->path);
 
         if (owned == NULL) {
@@ -72,12 +121,18 @@ HRESULT chuni_dll_init(const struct chuni_dll_config *cfg, HINSTANCE self)
 
         dprintf("Chunithm IO: Using custom IO DLL: %S\n", cfg->path);
         src = owned;
-    } else {
-        owned = NULL;
-        src = self;
     }
 
-    get_api_version = (void *) GetProcAddress(src, "chuni_io_get_api_version");
+    if (cfg->chu2to3) {
+        if (chu2to3_load_dll(cfg->path) != 0)
+		    dprintf("Could not init chu2to3 engine\n");
+
+        get_api_version = (void *) GetProcAddress(src, "chu2to3_io_get_api_version");
+    }
+	else
+	{
+        get_api_version = (void *) GetProcAddress(src, "chuni_io_get_api_version");
+	}
 
     if (get_api_version != NULL) {
         chuni_dll.api_version = get_api_version();
@@ -97,17 +152,26 @@ HRESULT chuni_dll_init(const struct chuni_dll_config *cfg, HINSTANCE self)
         goto end;
     }
 
-    sym = chuni_dll_syms;
+    sym = cfg->chu2to3 ? chu2to3_dll_syms : chuni_dll_syms;
+    const struct dll_bind_sym *init_sym = &sym[0];
+
     hr = dll_bind(&chuni_dll, src, &sym, _countof(chuni_dll_syms));
 
     if (FAILED(hr)) {
         if (src != self) {
-            dprintf("Chunithm IO: Custom IO DLL does not provide function "
+            // Might still be ok depending on external dll API version
-                    "\"%s\". Please contact your IO DLL's developer for "
+            int bind_count = sym - init_sym;
-                    "further assistance.\n",
+            if ( has_enough_symbols(chuni_dll.api_version, bind_count) == S_OK )
-                    sym->sym);
+            {
-
+                hr = S_OK;
-            goto end;
+            } else {
+                dprintf("Chunithm IO: Custom IO DLL does not provide function "
+                        "\"%s\". Please contact your IO DLL's developer for "
+                        "further assistance.\n",
+                        sym->sym);
+                dprintf("imported %d symbols\n",bind_count);
+                goto end;
+            }
         } else {
             dprintf("Internal error: could not reflect \"%s\"\n", sym->sym);
         }

chusanhook/chuni-dll.h

@@ -19,6 +19,7 @@ struct chuni_dll {
 
 struct chuni_dll_config {
     wchar_t path[MAX_PATH];
+    uint8_t chu2to3;
 };
 
 extern struct chuni_dll chuni_dll;

chusanhook/chusanhook.def

@@ -22,3 +22,13 @@ EXPORTS
     chuni_io_slider_stop
     chuni_io_led_init
     chuni_io_led_set_colors
+    chu2to3_io_get_api_version
+    chu2to3_io_jvs_init
+    chu2to3_io_jvs_poll
+    chu2to3_io_jvs_read_coin_counter
+    chu2to3_io_slider_init
+    chu2to3_io_slider_set_leds
+    chu2to3_io_slider_start
+    chu2to3_io_slider_stop
+    chu2to3_io_led_init
+    chu2to3_io_led_set_colors

chusanhook/config.c

@@ -39,16 +39,27 @@ void chuni_dll_config_load(
 
     // Workaround for x64/x86 external IO dlls
     // path32 for 32bit, path64 for 64bit
-    // for else.. is that possible? idk
+    // path for 32bit only dlls (internal chu2to3 engine)
 
-    #if defined(ENV32BIT)
+    GetPrivateProfileStringW(
-        GetPrivateProfileStringW(
+            L"chuniio",
-                L"chuniio",
+            L"path",
-                L"path32",
+            L"",
-                L"",
+            cfg->path,
-                cfg->path,
+            _countof(cfg->path),
-                _countof(cfg->path),
+            filename);
-                filename);
+    if (cfg->path[0] != L'\0') {
+        cfg->chu2to3 = 1;
+    } else {
+        cfg->chu2to3 = 0;
+    #if defined(ENV32BIT)	
+			GetPrivateProfileStringW(
+					L"chuniio",
+					L"path32",
+					L"",
+					cfg->path,
+					_countof(cfg->path),
+					filename);
     #elif defined(ENV64BIT)
         GetPrivateProfileStringW(
                 L"chuniio",
@@ -60,7 +71,7 @@ void chuni_dll_config_load(
     #else
         #error "Unknown environment"
     #endif
-    
+    }
 }
 
 void slider_config_load(struct slider_config *cfg, const wchar_t *filename)

chusanhook/dllmain.c

@@ -129,11 +129,16 @@ static DWORD CALLBACK chusan_pre_startup(void)
         }
     }
 
-    hr = led15093_hook_init(&chusan_hook_cfg.led15093, 
+    if ( chuni_dll.led_init == NULL || chuni_dll.led_set_leds == NULL )
-        chuni_dll.led_init, chuni_dll.led_set_leds, first_port, 2, 2, 1);
+    {
+        dprintf("IO DLL doesn't support led_init/led_set_leds, cannot start LED15093 hook\n");
+    } else {
+        hr = led15093_hook_init(&chusan_hook_cfg.led15093, 
+            chuni_dll.led_init, chuni_dll.led_set_leds, first_port, 2, 2, 1);
 
-    if (FAILED(hr)) {
+        if (FAILED(hr)) {
-        goto fail;
+            goto fail;
+        }
     }
 
     hr = sg_reader_hook_init(&chusan_hook_cfg.aime, 4, is_cvt ? 2: 3, chusan_hook_mod);

dist/chusan/segatools.ini

@@ -64,7 +64,11 @@ framed=0
 monitor=0
 
 [chuniio]
-; Uncomment this if you have custom chuniio implementation.
+; Uncomment this if you have custom chuniio implementation comprised of a single 32bit DLL.
+; (will use chu2to3 engine internally)
+;path=
+
+; Uncomment both of these if you have custom chuniio implementation comprised of two DLLs.
 ; x86 chuniio to path32, x64 to path64. Both are necessary.
 ;path32=
 ;path64=