Let us start here, from square one. No, from Zero!

2022-09-30 22:45:51 +09:00
parent 14215af0d1
commit b7a60638a4
1005 changed files with 303069 additions and 0 deletions
@@ -0,0 +1,82 @@
+#include "mga.h"
+
+#include "acio/icca/icca.h"
+#include "hooks/devicehook.h"
+#include "util/detour.h"
+#include "util/libutils.h"
+#include "util/logging.h"
+#include "util/detour.h"
+#include "util/sigscan.h"
+
+#include "gunio.h"
+
+namespace games::mga {
+    void (__cdecl *ess_eventlog_request_error_orig)(const char *, unsigned int, int, int);
+
+    static int __cdecl log_change_level_hook(int level) {
+        log_misc("mga", "ignoring log_change_level({})", level);
+
+        return 1;
+    }
+
+    static uintptr_t __cdecl log_change_output_hook(uintptr_t target, uintptr_t a2) {
+        log_misc("mga", "ignoring log_change_output(0x{:x}, 0x{:x})", target, a2);
+
+        return 0;
+    }
+
+    static bool __cdecl setvolume_hook(uint8_t volume) {
+        log_misc("mga", "ignoring setvolume {}", static_cast<int>(volume));
+        return false;
+    }
+
+    static void __cdecl ess_eventlog_request_error_hook(const char *a1, unsigned int a2, int a3, int a4) {
+        log_info("mga", "ess_eventlog_request_error({}, {}, {}, {})", a1, a2, a3, a4);
+
+        //ess_eventlog_request_error_orig(a1, a2, a3, a4);
+    }
+
+    MGAGame::MGAGame() : Game("Metal Gear Arcade") {
+    }
+
+    void MGAGame::attach() {
+        Game::attach();
+
+        // load system.dll (along with the serial functions)
+        auto system = libutils::load_library("system.dll");
+
+        // add the gun
+        devicehook_init();
+        devicehook_add(new SpiceGearGunHandle());
+
+        // fix ICCA
+        acio::ICCA_COMPAT_ACTIVE = true;
+
+        // ignore sound engine failure
+        if (!replace_pattern(
+                system,
+                "E8????????84C0750A68F4010000E8????????E8????????E8????????3BF3750433C0EB0C",
+                "??????????????????90909090909090909090????????????????????????????????????",
+                0, 0))
+        {
+            log_warning("mga", "failed to patch sound engine");
+        }
+
+        // hook setvolume
+        if (!detour::iat_try("?setvolume@@YAHPAD@Z", setvolume_hook)) {
+            log_warning("mga", "setvolume hook failed");
+        }
+
+        // stop the game from redirecting AVS log calls
+        detour::iat_try("log_change_level", log_change_level_hook);
+        detour::iat_try("log_change_output", log_change_output_hook);
+
+        ess_eventlog_request_error_orig = detour::iat_try("ess_eventlog_request_error", ess_eventlog_request_error_hook);
+    }
+
+    void MGAGame::detach() {
+        Game::detach();
+
+        devicehook_dispose();
+    }
+}