New feature: Override player input with machine learning models

Makefile.common

@@ -2648,4 +2648,9 @@ ifeq ($(HAVE_ODROIDGO2), 1)
          gfx/drivers/oga_gfx.o
 endif
 
+ifeq ($(HAVE_GAME_AI),1)
+   DEFINES += -DHAVE_GAME_AI
+   OBJ += ai/game_ai.o
+endif
+
 ##################################

ai/GameAILibAPI.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <bitset>
+#include <string>
+#include <filesystem>
+#include <vector>
+#include <queue>
+
+typedef void (*debug_log_t)(int level, const char *fmt, ...);
+
+#define GAMEAI_MAX_BUTTONS 16
+
+class GameAI {
+public:
+        virtual void    Init(void * ram_ptr, int ram_size) {};
+        virtual void    Think(bool buttons[GAMEAI_MAX_BUTTONS], int player, const void *frame_data, unsigned int frame_width, unsigned int frame_height, unsigned int frame_pitch, unsigned int pixel_format) {};
+        void            SetShowDebug(const bool show){ this->showDebug = show; };
+        void            SetDebugLog(debug_log_t func){debugLogFunc = func;};
+
+private:
+        bool            showDebug;
+        debug_log_t     debugLogFunc;
+};
+
+
+typedef GameAI * (*creategameai_t)(const char *);

ai/game_ai.cpp

@@ -0,0 +1,224 @@
+#include "game_ai.h"
+#include <stdio.h>
+#include <retro_assert.h>
+#include <bitset>
+#include <iostream>
+#include <string>
+#include <stdarg.h>
+
+#ifdef _WIN32
+#include <windows.h> 
+#else
+#include <dlfcn.h>
+#endif
+
+#define GAME_AI_MAX_PLAYERS 2
+
+#include "GameAILibAPI.h"
+
+class GameAIManager {
+public:
+   GameAIManager();
+
+   signed short int  Input(unsigned int port, unsigned int device, unsigned int idx, unsigned int id, signed short int result);
+   void              Init();
+   void              Load(const char * name, void * ram_ptr, int ram_size, retro_log_printf_t log);
+   void              Think(bool override_p1, bool override_p2, bool show_debug, const void *frame_data, unsigned int frame_width, unsigned int frame_height, unsigned int frame_pitch, unsigned int pixel_format);
+
+private:
+   creategameai_t             CreateGameAI;
+   GameAI *                   ga;
+   volatile void *            g_ram_ptr;
+   volatile int               g_ram_size;
+   volatile signed short int  g_buttons_bits[GAME_AI_MAX_PLAYERS];
+   volatile int               g_frameCount;
+   volatile char              game_ai_lib_path[1024];
+   std::string                g_game_name;
+
+};
+
+GameAIManager        gameAIMgr;
+retro_log_printf_t   g_log;
+
+//======================================================
+// Helper functions
+//======================================================
+extern "C" void game_ai_debug_log(int level, const char *fmt, ...)
+{
+   va_list vp;
+   va_start(vp, fmt);
+
+   if (g_log)
+   {
+      g_log((enum retro_log_level)level, fmt, vp);
+   }
+
+   va_end(vp);
+}
+
+void array_to_bits_16(volatile signed short & result, const bool b[16])
+{
+   for (int bit = 0; bit <= 15; bit++)
+   {
+      result |= b[bit] ? (1 << bit) : 0;
+   }
+}
+
+//======================================================
+// GameAIManager::GameAIManager
+//======================================================
+GameAIManager::GameAIManager()
+{
+   CreateGameAI = nullptr;
+   ga = nullptr;
+   g_ram_ptr = nullptr;
+   g_ram_size = 0;
+   g_buttons_bits[0] = 0;
+   g_buttons_bits[1] = 0;
+   g_frameCount = 0;
+   game_ai_lib_path[0]='\0';
+   g_log = nullptr;
+}
+
+//======================================================
+// GameAIManager::Input
+//======================================================
+signed short int GameAIManager::Input(unsigned int port, unsigned int device, unsigned int idx, unsigned int id, signed short int result)
+{
+   if (ga == nullptr)
+      return 0;
+
+   if (port < GAME_AI_MAX_PLAYERS)
+      return g_buttons_bits[port];
+
+   return 0;
+}
+
+//======================================================
+// GameAIManager::Init
+//======================================================
+void GameAIManager::Init()
+{
+   if (CreateGameAI == nullptr)
+   {
+#ifdef _WIN32
+   HINSTANCE hinstLib; 
+   BOOL fFreeResult, fRunTimeLinkSuccess = FALSE;
+
+   hinstLib = LoadLibrary(TEXT("game_ai.dll"));
+   retro_assert(hinstLib);
+
+   char full_module_path[MAX_PATH];
+   DWORD dwLen = GetModuleFileNameA(hinstLib, static_cast<char*>(&full_module_path), MAX_PATH);
+
+   if (hinstLib != NULL) 
+   { 
+      CreateGameAI = (creategameai_t) GetProcAddress(hinstLib, "CreateGameAI"); 
+
+      retro_assert(CreateGameAI);
+   } 
+#else
+      void *myso = dlopen("libgame_ai.so", RTLD_NOW);
+      retro_assert(myso);
+
+      if(myso != NULL)
+      {
+         dlinfo(myso, RTLD_DI_ORIGIN, (void *) &game_ai_lib_path);
+
+         CreateGameAI = reinterpret_cast<creategameai_t>(dlsym(myso, "CreateGameAI"));
+         retro_assert(CreateGameAI);
+      }
+#endif
+   }
+}
+
+//======================================================
+// GameAIManager::Load
+//======================================================
+void GameAIManager::Load(const char *name, void *ram_ptr, int ram_size, retro_log_printf_t log)
+{
+   g_game_name = name;
+
+   g_ram_ptr = ram_ptr;
+   g_ram_size = ram_size;
+
+   g_log = log;
+}
+
+//======================================================
+// GameAIManager::Think
+//======================================================
+void GameAIManager::Think(bool override_p1, bool override_p2, bool show_debug, const void *frame_data, unsigned int frame_width, unsigned int frame_height, unsigned int frame_pitch, unsigned int pixel_format)
+{
+   if (ga)
+      ga->SetShowDebug(show_debug);
+
+   if (ga == nullptr && g_ram_ptr != nullptr)
+   {
+      ga = CreateGameAI(g_game_name.c_str());
+      retro_assert(ga);
+
+      if (ga)
+      {
+         std::string data_path((char *)game_ai_lib_path);
+         data_path += "/data/";
+         data_path += g_game_name;
+
+         ga->Init((void *) g_ram_ptr, g_ram_size);
+
+         ga->SetDebugLog(game_ai_debug_log);
+      }
+   }
+
+   if (g_frameCount >= 3)
+   {
+      if (ga)
+      {
+         bool b[16] = {0};
+
+         g_buttons_bits[0]=0;
+         g_buttons_bits[1]=0;
+
+         if (override_p1)
+         {
+            ga->Think(b, 0, frame_data, frame_width, frame_height, frame_pitch, pixel_format);
+            array_to_bits_16(g_buttons_bits[0], b);
+         }
+
+         if (override_p2)
+         {
+            ga->Think(b, 1, frame_data, frame_width, frame_height, frame_pitch, pixel_format);
+            array_to_bits_16(g_buttons_bits[1], b);
+         }
+      }
+      g_frameCount=0;
+   }
+   else
+   {
+      g_frameCount++;
+   }
+}
+
+//======================================================
+// Interface to RA
+//======================================================
+extern "C" signed short int game_ai_input(unsigned int port, unsigned int device, unsigned int idx, unsigned int id, signed short int result)
+{
+   return gameAIMgr.Input(port,device, idx, id, result);
+}
+
+extern "C" void game_ai_init()
+{
+   gameAIMgr.Init();
+}
+
+extern "C" void game_ai_load(const char * name, void * ram_ptr, int ram_size, retro_log_printf_t log)
+{
+   gameAIMgr.Load(name, ram_ptr, ram_size, log);
+}
+
+extern "C" void game_ai_think(bool override_p1, bool override_p2, bool show_debug, const void *frame_data, unsigned int frame_width, unsigned int frame_height, unsigned int frame_pitch, unsigned int pixel_format) 
+{
+   gameAIMgr.Think(override_p1, override_p2, show_debug, frame_data, frame_width, frame_height, frame_pitch, pixel_format);
+}
+

ai/game_ai.h

@@ -0,0 +1,15 @@
+#pragma once
+
+
+#ifdef __cplusplus
+#define EXTERNC extern "C"
+#else
+#define EXTERNC
+#endif
+
+#include <libretro.h>
+
+EXTERNC signed short int game_ai_input(unsigned int port, unsigned int device, unsigned int idx, unsigned int id, signed short int result);
+EXTERNC void game_ai_init();
+EXTERNC void game_ai_load(const char * name, void * ram_ptr, int ram_size, retro_log_printf_t log);
+EXTERNC void game_ai_think(bool override_p1, bool override_p2, bool show_debug, const void *frame_data, unsigned int frame_width, unsigned int frame_height, unsigned int frame_pitch, unsigned int pixel_format);

configuration.c

@@ -2227,6 +2227,10 @@ static struct config_bool_setting *populate_settings_bool(
    SETTING_BOOL("gcdwebserver_alert",            &settings->bools.gcdwebserver_alert, true, true, false);
 #endif
 
+#ifdef HAVE_GAME_AI
+   SETTING_BOOL("quick_menu_show_game_ai",  &settings->bools.quick_menu_show_game_ai, true, 1, false);
+#endif
+
    *size = count;
 
    return tmp;

configuration.h

@@ -1095,6 +1095,14 @@ typedef struct settings
 #if defined(HAVE_COCOATOUCH)
       bool gcdwebserver_alert;
 #endif
+
+#ifdef HAVE_GAME_AI
+      bool quick_menu_show_game_ai;
+      bool game_ai_override_p1;
+      bool game_ai_override_p2;
+      bool game_ai_show_debug;
+#endif
+
    } bools;
 
    uint8_t flags;

deps/game_ai_lib/.gitignore

@@ -0,0 +1,8 @@
+libtorch/
+build/
+CMakeFiles/
+Debug/
+libtorch/
+win/
+*.zip
+.vscode/

deps/game_ai_lib/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
+project(custom_ops)
+
+find_package(Torch REQUIRED)
+find_package(OpenCV REQUIRED)
+include_directories(${OpenCV_INCLUDE_DIRS})
+
+add_executable(test test.cpp RetroModel.cpp)
+target_link_libraries(test "${TORCH_LIBRARIES}" ${OpenCV_LIBS})
+
+add_library(game_ai SHARED GameAILocal.cpp RetroModel.cpp games/NHL94GameAI.cpp games/NHL94GameData.cpp games/DefaultGameAI.cpp utils/data.cpp utils/memory.cpp utils/utils.cpp)
+
+target_link_libraries(game_ai "${TORCH_LIBRARIES}" ${OpenCV_LIBS})
+
+set_property(TARGET test PROPERTY CXX_STANDARD 17)
+set_property(TARGET game_ai PROPERTY CXX_STANDARD 17)
+
+if (MSVC)
+  file(GLOB TORCH_DLLS "${TORCH_INSTALL_PREFIX}/lib/*.dll")
+  add_custom_command(TARGET test
+                     POST_BUILD
+                     COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                     ${TORCH_DLLS}
+                     $<TARGET_FILE_DIR:test>)
+endif (MSVC)

deps/game_ai_lib/GameAI.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <bitset>
+#include <string>
+#include <filesystem>
+#include <vector>
+#include <queue>
+
+typedef void (*debug_log_t)(int level, const char *fmt, ...);
+
+#define GAMEAI_MAX_BUTTONS 16
+
+class GameAI {
+public:
+        virtual void    Init(void * ram_ptr, int ram_size) {};
+        virtual void    Think(bool buttons[GAMEAI_MAX_BUTTONS], int player, const void *frame_data, unsigned int frame_width, unsigned int frame_height, unsigned int frame_pitch, unsigned int pixel_format) {};
+        void            SetShowDebug(const bool show){ this->showDebug = show; };
+        void            SetDebugLog(debug_log_t func){debugLogFunc = func;};
+
+private:
+        bool            showDebug;
+        debug_log_t     debugLogFunc;
+};
+
+
+typedef GameAI * (*creategameai_t)(const char *);