gp2x/emu.c

   1 // (c) Copyright 2006 notaz, All rights reserved.\r
   2 // Free for non-commercial use.\r
   3 \r
   4 // For commercial use, separate licencing terms must be obtained.\r
   5 \r
   6 #include <stdio.h>\r
   7 #include <stdlib.h>\r
   8 #include <sys/time.h>\r
   9 #include <sys/stat.h>\r
  10 #include <sys/types.h>\r
  11 #include <linux/limits.h>\r
  12 #include <ctype.h>\r
  13 #include <unistd.h>\r
  14 \r
  15 #include <stdarg.h>\r
  16 \r
  17 #include "emu.h"\r
  18 #include "gp2x.h"\r
  19 #include "usbjoy.h"\r
  20 #include "menu.h"\r
  21 #include "asmutils.h"\r
  22 #include "cpuctrl.h"\r
  23 \r
  24 #include <Pico/PicoInt.h>\r
  25 #include <Pico/Patch.h>\r
  26 #include <zlib/zlib.h>\r
  27 \r
  28 \r
  29 #ifdef BENCHMARK\r
  30 #define OSD_FPS_X 220\r
  31 #else\r
  32 #define OSD_FPS_X 260\r
  33 #endif\r
  34 \r
  35 // PicoPad[] format: SACB RLDU\r
  36 char *actionNames[] = {\r
  37         "UP", "DOWN", "LEFT", "RIGHT", "B", "C", "A", "START",\r
  38         0, 0, 0, 0, 0, 0, 0, 0, // Z, Y, X, MODE (enabled only when needed), ?, ?, ?, ?\r
  39         0, 0, 0, 0, 0, 0, 0, "ENTER MENU", // player2_flag, ?, ?, ?, ?, ?, ?, menu\r
  40         "NEXT SAVE SLOT", "PREV SAVE SLOT", "SWITCH RENDERER", "SAVE STATE",\r
  41         "LOAD STATE", "VOLUME UP", "VOLUME DOWN", "DONE"\r
  42 };\r
  43 \r
  44 int engineState;\r
  45 int select_exits = 0;\r
  46 char *PicoConfigFile = "picoconfig.bin";\r
  47 currentConfig_t currentConfig;\r
  48 \r
  49 char romFileName[PATH_MAX];\r
  50 unsigned char *rom_data = NULL;\r
  51 \r
  52 extern int crashed_940;\r
  53 \r
  54 static short sndBuffer[2*44100/50];\r
  55 static char noticeMsg[64];                                      // notice msg to draw\r
  56 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  57 static int osd_fps_x;\r
  58 static int combo_keys = 0, combo_acts = 0;      // keys and actions which need button combos\r
  59 static int gp2x_old_gamma = 100;\r
  60 static unsigned char *movie_data = NULL;\r
  61 static int movie_size = 0;\r
  62 unsigned char *framebuff = 0;  // temporary buffer for alt renderer\r
  63 int state_slot = 0;\r
  64 int reset_timing = 0;\r
  65 \r
  66 \r
  67 // utilities\r
  68 static void strlwr(char* string)\r
  69 {\r
  70         while ( (*string++ = (char)tolower(*string)) );\r
  71 }\r
  72 \r
  73 static int try_rfn_cut(void)\r
  74 {\r
  75         FILE *tmp;\r
  76         char *p;\r
  77 \r
  78         p = romFileName + strlen(romFileName) - 1;\r
  79         for (; p > romFileName; p--)\r
  80                 if (*p == '.') break;\r
  81         *p = 0;\r
  82 \r
  83         if((tmp = fopen(romFileName, "rb"))) {\r
  84                 fclose(tmp);\r
  85                 return 1;\r
  86         }\r
  87         return 0;\r
  88 }\r
  89 \r
  90 static void get_ext(char *file, char *ext)\r
  91 {\r
  92         char *p;\r
  93 \r
  94         p = file + strlen(file) - 4;\r
  95         if (p < file) p = file;\r
  96         strncpy(ext, p, 4);\r
  97         ext[4] = 0;\r
  98         strlwr(ext);\r
  99 }\r
 100 \r
 101 char *biosfiles_us[] = { "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210" };\r
 102 char *biosfiles_eu[] = { "eu_mcd2_9306", "eu_mcd2_9303",   "eu_mcd1_9210" };\r
 103 char *biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };\r
 104 \r
 105 extern char **g_argv;\r
 106 \r
 107 int find_bios(int region, char **bios_file)\r
 108 {\r
 109         static char bios_path[1024];\r
 110         int i, j, count;\r
 111         char **files;\r
 112         FILE *f = NULL;\r
 113 \r
 114         if (region == 4) { // US\r
 115                 files = biosfiles_us;\r
 116                 count = sizeof(biosfiles_us) / sizeof(char *);\r
 117         } else if (region == 8) { // EU\r
 118                 files = biosfiles_eu;\r
 119                 count = sizeof(biosfiles_eu) / sizeof(char *);\r
 120         } else if (region == 1 || region == 2) {\r
 121                 files = biosfiles_jp;\r
 122                 count = sizeof(biosfiles_jp) / sizeof(char *);\r
 123         } else {\r
 124                 return 0;\r
 125         }\r
 126 \r
 127         for (i = 0; i < count; i++)\r
 128         {\r
 129                 strncpy(bios_path, g_argv[0], 1023);\r
 130                 bios_path[1024-32] = 0;\r
 131                 for (j = strlen(bios_path); j > 0; j--)\r
 132                         if (bios_path[j] == '/') { bios_path[j+1] = 0; break; }\r
 133                 strcat(bios_path, files[i]);\r
 134                 strcat(bios_path, ".bin");\r
 135                 f = fopen(bios_path, "rb");\r
 136                 if (f) break;\r
 137 \r
 138                 bios_path[strlen(bios_path) - 4] = 0;\r
 139                 strcat(bios_path, ".zip");\r
 140                 f = fopen(bios_path, "rb");\r
 141                 if (f) break;\r
 142         }\r
 143 \r
 144         if (f) {\r
 145                 printf("using bios: %s\n", bios_path);\r
 146                 fclose(f);\r
 147                 if (bios_file) *bios_file = bios_path;\r
 148                 return 1;\r
 149         } else {\r
 150                 sprintf(menuErrorMsg, "no %s BIOS files found, read docs",\r
 151                         region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
 152                 printf("%s\n", menuErrorMsg);\r
 153                 return 0;\r
 154         }\r
 155 }\r
 156 \r
 157 /* checks if romFileName points to valid MegaCD image\r
 158  * if so, checks for suitable BIOS */\r
 159 static int cd_check(char **bios_file)\r
 160 {\r
 161         unsigned char buf[32];\r
 162         pm_file *cd_f;\r
 163         int type = 0, region = 4; // 1: Japan, 4: US, 8: Europe\r
 164 \r
 165         cd_f = pm_open(romFileName);\r
 166         if (!cd_f) return 0; // let the upper level handle this\r
 167 \r
 168         if (pm_read(buf, 32, cd_f) != 32) {\r
 169                 pm_close(cd_f);\r
 170                 return 0;\r
 171         }\r
 172 \r
 173         if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x00, 14)) type = 1;       // Sega CD (ISO)\r
 174         if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x10, 14)) type = 2;       // Sega CD (BIN)\r
 175         if (type == 0) {\r
 176                 pm_close(cd_f);\r
 177                 return 0;\r
 178         }\r
 179 \r
 180         /* it seems we have a CD image here. Try to detect region and load a suitable BIOS now.. */\r
 181         pm_seek(cd_f, (type == 1) ? 0x100+0x10B : 0x110+0x10B, SEEK_SET);\r
 182         pm_read(buf, 1, cd_f);\r
 183         pm_close(cd_f);\r
 184 \r
 185         if (buf[0] == 0x64) region = 8; // EU\r
 186         if (buf[0] == 0xa1) region = 1; // JAP\r
 187 \r
 188         printf("detected %s Sega/Mega CD image with %s region\n",\r
 189                 type == 2 ? "BIN" : "ISO", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
 190 \r
 191         if (PicoRegionOverride) {\r
 192                 region = PicoRegionOverride;\r
 193                 printf("overrided region to %s\n", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
 194         }\r
 195 \r
 196         if(find_bios(region, bios_file))\r
 197                  return type;   // CD and BIOS detected\r
 198 \r
 199         return -1;              // CD detected but load failed\r
 200 }\r
 201 \r
 202 int emu_ReloadRom(void)\r
 203 {\r
 204         unsigned int rom_size = 0;\r
 205         char *used_rom_name = romFileName;\r
 206         char ext[5];\r
 207         pm_file *rom;\r
 208         int ret, cd_state;\r
 209 \r
 210         printf("emu_ReloadRom(%s)\n", romFileName);\r
 211 \r
 212         get_ext(romFileName, ext);\r
 213 \r
 214         // detect wrong extensions\r
 215         if(!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) { // s.gz ~ .mds.gz\r
 216                 sprintf(menuErrorMsg, "Not a ROM selected.");\r
 217                 return 0;\r
 218         }\r
 219 \r
 220         PicoPatchUnload();\r
 221 \r
 222         // check for movie file\r
 223         if(movie_data) {\r
 224                 free(movie_data);\r
 225                 movie_data = 0;\r
 226         }\r
 227         if(!strcmp(ext, ".gmv")) {\r
 228                 // check for both gmv and rom\r
 229                 int dummy;\r
 230                 FILE *movie_file = fopen(romFileName, "rb");\r
 231                 if(!movie_file) {\r
 232                         sprintf(menuErrorMsg, "Failed to open movie.");\r
 233                         return 0;\r
 234                 }\r
 235                 fseek(movie_file, 0, SEEK_END);\r
 236                 movie_size = ftell(movie_file);\r
 237                 fseek(movie_file, 0, SEEK_SET);\r
 238                 if(movie_size < 64+3) {\r
 239                         sprintf(menuErrorMsg, "Invalid GMV file.");\r
 240                         fclose(movie_file);\r
 241                         return 0;\r
 242                 }\r
 243                 movie_data = malloc(movie_size);\r
 244                 if(movie_data == NULL) {\r
 245                         sprintf(menuErrorMsg, "low memory.");\r
 246                         fclose(movie_file);\r
 247                         return 0;\r
 248                 }\r
 249                 fread(movie_data, 1, movie_size, movie_file);\r
 250                 fclose(movie_file);\r
 251                 if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {\r
 252                         sprintf(menuErrorMsg, "Invalid GMV file.");\r
 253                         return 0;\r
 254                 }\r
 255                 dummy = try_rfn_cut() || try_rfn_cut();\r
 256                 if (!dummy) {\r
 257                         sprintf(menuErrorMsg, "Could't find a ROM for movie.");\r
 258                         return 0;\r
 259                 }\r
 260                 get_ext(romFileName, ext);\r
 261         }\r
 262         else if (!strcmp(ext, ".pat")) {\r
 263                 int dummy;\r
 264                 PicoPatchLoad(romFileName);\r
 265                 dummy = try_rfn_cut() || try_rfn_cut();\r
 266                 if (!dummy) {\r
 267                         sprintf(menuErrorMsg, "Could't find a ROM to patch.");\r
 268                         return 0;\r
 269                 }\r
 270                 get_ext(romFileName, ext);\r
 271         }\r
 272 \r
 273         // check for MegaCD image\r
 274         cd_state = cd_check(&used_rom_name);\r
 275         if (cd_state > 0) {\r
 276                 PicoMCD |= 1;\r
 277                 get_ext(used_rom_name, ext);\r
 278         } else if (cd_state == -1) {\r
 279                 // bios_help() ?\r
 280                 return 0;\r
 281         } else {\r
 282                 if (PicoMCD & 1) PicoExitMCD();\r
 283                 PicoMCD &= ~1;\r
 284         }\r
 285 \r
 286         rom = pm_open(used_rom_name);\r
 287         if(!rom) {\r
 288                 sprintf(menuErrorMsg, "Failed to open rom.");\r
 289                 return 0;\r
 290         }\r
 291 \r
 292         if(rom_data) {\r
 293                 free(rom_data);\r
 294                 rom_data = 0;\r
 295                 rom_size = 0;\r
 296         }\r
 297 \r
 298         if( (ret = PicoCartLoad(rom, &rom_data, &rom_size)) ) {\r
 299                 sprintf(menuErrorMsg, "PicoCartLoad() failed.");\r
 300                 printf("%s\n", menuErrorMsg);\r
 301                 pm_close(rom);\r
 302                 return 0;\r
 303         }\r
 304         pm_close(rom);\r
 305 \r
 306         // detect wrong files (Pico crashes on very small files), also see if ROM EP is good\r
 307         if(rom_size <= 0x200 || strncmp((char *)rom_data, "Pico", 4) == 0 ||\r
 308           ((*(unsigned short *)(rom_data+4)<<16)|(*(unsigned short *)(rom_data+6))) >= (int)rom_size) {\r
 309                 if (rom_data) free(rom_data);\r
 310                 rom_data = 0;\r
 311                 sprintf(menuErrorMsg, "Not a ROM selected.");\r
 312                 return 0;\r
 313         }\r
 314 \r
 315         // load config for this ROM (do this before insert to get correct region)\r
 316         ret = emu_ReadConfig(1);\r
 317         if (!ret)\r
 318                 emu_ReadConfig(0);\r
 319 \r
 320         printf("PicoCartInsert(%p, %d);\n", rom_data, rom_size);\r
 321         if(PicoCartInsert(rom_data, rom_size)) {\r
 322                 sprintf(menuErrorMsg, "Failed to load ROM.");\r
 323                 return 0;\r
 324         }\r
 325 \r
 326         Pico.m.frame_count = 0;\r
 327 \r
 328         // insert CD if it was detected\r
 329         if (cd_state > 0) {\r
 330                 ret = Insert_CD(romFileName, cd_state == 2);\r
 331                 if (ret != 0) {\r
 332                         sprintf(menuErrorMsg, "Insert_CD() failed, invalid CD image?");\r
 333                         printf("%s\n", menuErrorMsg);\r
 334                         return 0;\r
 335                 }\r
 336         }\r
 337 \r
 338         // emu_ReadConfig() might have messed currentConfig.lastRomFile\r
 339         strncpy(currentConfig.lastRomFile, romFileName, sizeof(currentConfig.lastRomFile)-1);\r
 340         currentConfig.lastRomFile[sizeof(currentConfig.lastRomFile)-1] = 0;\r
 341 \r
 342         if (PicoPatches) {\r
 343                 PicoPatchPrepare();\r
 344                 PicoPatchApply();\r
 345         }\r
 346 \r
 347         // additional movie stuff\r
 348         if(movie_data) {\r
 349                 if(movie_data[0x14] == '6')\r
 350                      PicoOpt |=  0x20; // 6 button pad\r
 351                 else PicoOpt &= ~0x20;\r
 352                 PicoOpt |= 0x40; // accurate timing\r
 353                 if(movie_data[0xF] >= 'A') {\r
 354                         if(movie_data[0x16] & 0x80) {\r
 355                                 PicoRegionOverride = 8;\r
 356                         } else {\r
 357                                 PicoRegionOverride = 4;\r
 358                         }\r
 359                         PicoReset(0);\r
 360                         // TODO: bits 6 & 5\r
 361                 }\r
 362                 movie_data[0x18+30] = 0;\r
 363                 sprintf(noticeMsg, "MOVIE: %s", (char *) &movie_data[0x18]);\r
 364         }\r
 365         else\r
 366         {\r
 367                 if(Pico.m.pal) {\r
 368                         strcpy(noticeMsg, "PAL SYSTEM / 50 FPS");\r
 369                 } else {\r
 370                         strcpy(noticeMsg, "NTSC SYSTEM / 60 FPS");\r
 371                 }\r
 372         }\r
 373         gettimeofday(&noticeMsgTime, 0);\r
 374 \r
 375         // load SRAM for this ROM\r
 376         if(currentConfig.EmuOpt & 1)\r
 377                 emu_SaveLoadGame(1, 1);\r
 378 \r
 379         return 1;\r
 380 }\r
 381 \r
 382 \r
 383 static void emu_msg_cb(const char *msg);\r
 384 \r
 385 void emu_Init(void)\r
 386 {\r
 387         // make temp buffer for alt renderer\r
 388         framebuff = malloc((8+320)*(8+240+8));\r
 389         if (!framebuff)\r
 390         {\r
 391                 printf("framebuff == 0\n");\r
 392         }\r
 393 \r
 394         // make dirs for saves, cfgs, etc.\r
 395         mkdir("mds", 0777);\r
 396         mkdir("srm", 0777);\r
 397         mkdir("brm", 0777);\r
 398         mkdir("cfg", 0777);\r
 399 \r
 400         PicoInit();\r
 401         PicoMessage = emu_msg_cb;\r
 402 \r
 403 //      logf = fopen("log.txt", "w");\r
 404 }\r
 405 \r
 406 \r
 407 static void romfname_ext(char *dst, const char *prefix, const char *ext)\r
 408 {\r
 409         char *p;\r
 410         int prefix_len = 0;\r
 411 \r
 412         // make save filename\r
 413         for (p = romFileName+strlen(romFileName)-1; p >= romFileName && *p != '/'; p--); p++;\r
 414         *dst = 0;\r
 415         if (prefix) {\r
 416                 strcpy(dst, prefix);\r
 417                 prefix_len = strlen(prefix);\r
 418         }\r
 419         strncpy(dst + prefix_len, p, 511-prefix_len);\r
 420         dst[511-8] = 0;\r
 421         if (dst[strlen(dst)-4] == '.') dst[strlen(dst)-4] = 0;\r
 422         if (ext) strcat(dst, ext);\r
 423 }\r
 424 \r
 425 \r
 426 static void find_combos(void)\r
 427 {\r
 428         int act, u;\r
 429 \r
 430         // find out which keys and actions are combos\r
 431         combo_keys = combo_acts = 0;\r
 432         for (act = 0; act < 32; act++)\r
 433         {\r
 434                 int keyc = 0;\r
 435                 if (act == 16) continue; // player2 flag\r
 436                 for (u = 0; u < 32; u++)\r
 437                 {\r
 438                         if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;\r
 439                 }\r
 440                 if (keyc > 1)\r
 441                 {\r
 442                         // loop again and mark those keys and actions as combo\r
 443                         for (u = 0; u < 32; u++)\r
 444                         {\r
 445                                 if (currentConfig.KeyBinds[u] & (1 << act)) {\r
 446                                         combo_keys |= 1 << u;\r
 447                                         combo_acts |= 1 << act;\r
 448                                 }\r
 449                         }\r
 450                 }\r
 451         }\r
 452         // printf("combo keys/acts: %08x %08x\n", combo_keys, combo_acts);\r
 453 }\r
 454 \r
 455 \r
 456 void scaling_update(void)\r
 457 {\r
 458         PicoOpt &= ~0x4100;\r
 459         switch (currentConfig.scaling) {\r
 460                 default: break; // off\r
 461                 case 1:  // hw hor\r
 462                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 463                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 464         }\r
 465 }\r
 466 \r
 467 \r
 468 int emu_ReadConfig(int game)\r
 469 {\r
 470         FILE *f;\r
 471         char cfg[512];\r
 472         int bread = 0;\r
 473 \r
 474         if (!game)\r
 475         {\r
 476                 // set default config\r
 477                 memset(&currentConfig, 0, sizeof(currentConfig));\r
 478                 currentConfig.lastRomFile[0] = 0;\r
 479                 currentConfig.EmuOpt  = 0x1f | 0x400; // | cd_leds\r
 480                 currentConfig.PicoOpt = 0x0f | 0xe00; // | use_940 | cd_pcm | cd_cdda\r
 481                 currentConfig.PsndRate = 22050; // 44100;\r
 482                 currentConfig.PicoRegion = 0; // auto\r
 483                 currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 484                 currentConfig.Frameskip = -1; // auto\r
 485                 currentConfig.CPUclock = 200;\r
 486                 currentConfig.volume = 50;\r
 487                 currentConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 488                 currentConfig.KeyBinds[ 4] = 1<<1;\r
 489                 currentConfig.KeyBinds[ 2] = 1<<2;\r
 490                 currentConfig.KeyBinds[ 6] = 1<<3;\r
 491                 currentConfig.KeyBinds[14] = 1<<4;\r
 492                 currentConfig.KeyBinds[13] = 1<<5;\r
 493                 currentConfig.KeyBinds[12] = 1<<6;\r
 494                 currentConfig.KeyBinds[ 8] = 1<<7;\r
 495                 currentConfig.KeyBinds[15] = 1<<26; // switch rend\r
 496                 currentConfig.KeyBinds[10] = 1<<27; // save state\r
 497                 currentConfig.KeyBinds[11] = 1<<28; // load state\r
 498                 currentConfig.KeyBinds[23] = 1<<29; // vol up\r
 499                 currentConfig.KeyBinds[22] = 1<<30; // vol down\r
 500                 currentConfig.gamma = 100;\r
 501                 currentConfig.PicoCDBuffers = 64;\r
 502                 currentConfig.scaling = 0;\r
 503                 strncpy(cfg, PicoConfigFile, 511);\r
 504                 cfg[511] = 0;\r
 505         } else {\r
 506                 romfname_ext(cfg, "cfg/", ".pbcfg");\r
 507                 f = fopen(cfg, "rb");\r
 508                 if (!f) romfname_ext(cfg, NULL, ".pbcfg");\r
 509                 else fclose(f);\r
 510         }\r
 511 \r
 512         printf("emu_ReadConfig: %s ", cfg);\r
 513         f = fopen(cfg, "rb");\r
 514         if (f) {\r
 515                 bread = fread(&currentConfig, 1, sizeof(currentConfig), f);\r
 516                 fclose(f);\r
 517         }\r
 518         printf(bread > 0 ? "(ok)\n" : "(failed)\n");\r
 519 \r
 520         PicoOpt = currentConfig.PicoOpt;\r
 521         PsndRate = currentConfig.PsndRate;\r
 522         PicoRegionOverride = currentConfig.PicoRegion;\r
 523         PicoAutoRgnOrder = currentConfig.PicoAutoRgnOrder;\r
 524         PicoCDBuffers = currentConfig.PicoCDBuffers;\r
 525         if (PicoOpt & 0x20) {\r
 526                 actionNames[ 8] = "Z"; actionNames[ 9] = "Y";\r
 527                 actionNames[10] = "X"; actionNames[11] = "MODE";\r
 528         }\r
 529         scaling_update();\r
 530         // some sanity checks\r
 531         if (currentConfig.CPUclock < 1 || currentConfig.CPUclock > 4096) currentConfig.CPUclock = 200;\r
 532         if (currentConfig.gamma < 10 || currentConfig.gamma > 300) currentConfig.gamma = 100;\r
 533         // if volume keys are unbound, bind them to volume control\r
 534         if (!currentConfig.KeyBinds[23] && !currentConfig.KeyBinds[22]) {\r
 535                 currentConfig.KeyBinds[23] = 1<<29; // vol up\r
 536                 currentConfig.KeyBinds[22] = 1<<30; // vol down\r
 537         }\r
 538 \r
 539         return (bread > 0); // == sizeof(currentConfig));\r
 540 }\r
 541 \r
 542 \r
 543 int emu_WriteConfig(int game)\r
 544 {\r
 545         FILE *f;\r
 546         char cfg[512];\r
 547         int bwrite = 0;\r
 548 \r
 549         if (!game)\r
 550         {\r
 551                 strncpy(cfg, PicoConfigFile, 511);\r
 552                 cfg[511] = 0;\r
 553         } else {\r
 554                 romfname_ext(cfg, "cfg/", ".pbcfg");\r
 555         }\r
 556 \r
 557         printf("emu_WriteConfig: %s ", cfg);\r
 558         f = fopen(cfg, "wb");\r
 559         if (f) {\r
 560                 currentConfig.PicoOpt = PicoOpt;\r
 561                 currentConfig.PsndRate = PsndRate;\r
 562                 currentConfig.PicoRegion = PicoRegionOverride;\r
 563                 currentConfig.PicoAutoRgnOrder = PicoAutoRgnOrder;\r
 564                 currentConfig.PicoCDBuffers = PicoCDBuffers;\r
 565                 bwrite = fwrite(&currentConfig, 1, sizeof(currentConfig), f);\r
 566                 fflush(f);\r
 567                 fclose(f);\r
 568 #ifndef NO_SYNC\r
 569                 sync();\r
 570 #endif\r
 571         }\r
 572         printf((bwrite == sizeof(currentConfig)) ? "(ok)\n" : "(failed)\n");\r
 573 \r
 574         return (bwrite == sizeof(currentConfig));\r
 575 }\r
 576 \r
 577 \r
 578 void emu_Deinit(void)\r
 579 {\r
 580         // save SRAM\r
 581         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 582                 emu_SaveLoadGame(0, 1);\r
 583                 SRam.changed = 0;\r
 584         }\r
 585 \r
 586         if (!(currentConfig.EmuOpt & 0x20)) {\r
 587                 FILE *f = fopen(PicoConfigFile, "r+b");\r
 588                 if (!f) emu_WriteConfig(0);\r
 589                 else {\r
 590                         // if we already have config, reload it, except last ROM\r
 591                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);\r
 592                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);\r
 593                         fseek(f, 0, SEEK_SET);\r
 594                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);\r
 595                         fflush(f);\r
 596                         fclose(f);\r
 597 #ifndef NO_SYNC\r
 598                         sync();\r
 599 #endif\r
 600                 }\r
 601         }\r
 602 \r
 603         free(framebuff);\r
 604 \r
 605         PicoExit();\r
 606 //      fclose(logf);\r
 607 \r
 608         // restore gamma\r
 609         if (gp2x_old_gamma != 100)\r
 610                 set_gamma(100);\r
 611 }\r
 612 \r
 613 \r
 614 void osd_text(int x, int y, const char *text)\r
 615 {\r
 616         int len = strlen(text)*8;\r
 617 \r
 618         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 619                 int *p, i, h;\r
 620                 x &= ~3; // align x\r
 621                 len = (len+3) >> 2;\r
 622                 for (h = 0; h < 8; h++) {\r
 623                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 624                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 625                 }\r
 626                 gp2x_text_out8_2(x, y, text, 0xf0);\r
 627         } else {\r
 628                 int *p, i, h;\r
 629                 x &= ~1; // align x\r
 630                 len = (len+1) >> 1;\r
 631                 for (h = 0; h < 8; h++) {\r
 632                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 633                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 634                 }\r
 635                 gp2x_text_out15(x, y, text);\r
 636         }\r
 637 }\r
 638 \r
 639 static void cd_leds(void)\r
 640 {\r
 641         // mmu problems?\r
 642 //      static\r
 643         int old_reg;\r
 644 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change\r
 645         old_reg = Pico_mcd->s68k_regs[0];\r
 646 \r
 647         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 648                 // 8-bit modes\r
 649                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 650                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 651                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 652                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 653                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 654                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 655                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 656                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 657         } else {\r
 658                 // 16-bit modes\r
 659                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 660                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 661                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 662                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 663                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 664                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 665         }\r
 666 }\r
 667 \r
 668 static int EmuScan16(unsigned int num, void *sdata)\r
 669 {\r
 670         if (!(Pico.video.reg[1]&8)) num += 8;\r
 671         DrawLineDest = (unsigned short *) gp2x_screen + 320*(num+1);\r
 672 \r
 673         return 0;\r
 674 }\r
 675 \r
 676 static int EmuScan8(unsigned int num, void *sdata)\r
 677 {\r
 678         if (!(Pico.video.reg[1]&8)) num += 8;\r
 679         DrawLineDest = (unsigned char *)  gp2x_screen + 320*(num+1);\r
 680 \r
 681         return 0;\r
 682 }\r
 683 \r
 684 int localPal[0x100];\r
 685 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 686 \r
 687 static void blit(const char *fps, const char *notice)\r
 688 {\r
 689         int emu_opt = currentConfig.EmuOpt;\r
 690 \r
 691         if (PicoOpt&0x10) {\r
 692                 // 8bit fast renderer\r
 693                 if (Pico.m.dirtyPal) {\r
 694                         Pico.m.dirtyPal = 0;\r
 695                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 696                         // feed new palette to our device\r
 697                         gp2x_video_setpalette(localPal, 0x40);\r
 698                 }\r
 699                 vidCpyM2((unsigned char *)gp2x_screen+320*8, framebuff+328*8);\r
 700         } else if (!(emu_opt&0x80)) {\r
 701                 // 8bit accurate renderer\r
 702                 if (Pico.m.dirtyPal) {\r
 703                         Pico.m.dirtyPal = 0;\r
 704                         if(Pico.video.reg[0xC]&8) { // shadow/hilight mode\r
 705                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 706                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 707                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 708                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*4);\r
 709                                 localPal[0xc0] = 0x0000c000;\r
 710                                 localPal[0xd0] = 0x00c00000;\r
 711                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 712                                 localPal[0xf0] = 0x00ffffff;\r
 713                                 gp2x_video_setpalette(localPal, 0x100);\r
 714                         } else if (rendstatus & 0x20) { // mid-frame palette changes\r
 715                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 716                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 717                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 718                                 gp2x_video_setpalette(localPal, 0xc0);\r
 719                         } else {\r
 720                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 721                                 gp2x_video_setpalette(localPal, 0x40);\r
 722                         }\r
 723                 }\r
 724         }\r
 725 \r
 726         if (notice || (emu_opt & 2)) {\r
 727                 int h = 232;\r
 728                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 729                 if (notice) osd_text(4, h, notice);\r
 730                 if (emu_opt & 2)\r
 731                         osd_text(osd_fps_x, h, fps);\r
 732         }\r
 733         if ((emu_opt & 0x400) && (PicoMCD & 1))\r
 734                 cd_leds();\r
 735 \r
 736         //gp2x_video_wait_vsync();\r
 737         gp2x_video_flip();\r
 738 \r
 739         if (!(PicoOpt&0x10)) {\r
 740                 if (!(Pico.video.reg[1]&8)) {\r
 741                         if (currentConfig.EmuOpt&0x80) {\r
 742                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 743                         } else {\r
 744                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 745                         }\r
 746                 } else {\r
 747                         DrawLineDest = gp2x_screen;\r
 748                 }\r
 749         }\r
 750 }\r
 751 \r
 752 \r
 753 // clears whole screen or just the notice area (in all buffers)\r
 754 static void clearArea(int full)\r
 755 {\r
 756         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 757                 // 8-bit renderers\r
 758                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 759                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 760         } else {\r
 761                 // 16bit accurate renderer\r
 762                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 763                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 764         }\r
 765 }\r
 766 \r
 767 \r
 768 static void vidResetMode(void)\r
 769 {\r
 770         if (PicoOpt&0x10) {\r
 771                 gp2x_video_changemode(8);\r
 772         } else if (currentConfig.EmuOpt&0x80) {\r
 773                 gp2x_video_changemode(15);\r
 774                 PicoDrawSetColorFormat(1);\r
 775                 PicoScan = EmuScan16;\r
 776                 PicoScan(0, 0);\r
 777         } else {\r
 778                 gp2x_video_changemode(8);\r
 779                 PicoDrawSetColorFormat(2);\r
 780                 PicoScan = EmuScan8;\r
 781                 PicoScan(0, 0);\r
 782         }\r
 783         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 784                 // setup pal for 8-bit modes\r
 785                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 786                 localPal[0xd0] = 0x00c00000;\r
 787                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 788                 localPal[0xf0] = 0x00ffffff;\r
 789                 gp2x_video_setpalette(localPal, 0x100);\r
 790                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 791                 gp2x_video_flip();\r
 792         }\r
 793         Pico.m.dirtyPal = 1;\r
 794         // reset scaling\r
 795         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 796              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 797         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 798 }\r
 799 \r
 800 \r
 801 static void emu_msg_cb(const char *msg)\r
 802 {\r
 803         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 804                 // 8-bit renderers\r
 805                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 806                 osd_text(4, 232, msg);\r
 807                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 808         } else {\r
 809                 // 16bit accurate renderer\r
 810                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 811                 osd_text(4, 232, msg);\r
 812                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 813         }\r
 814         gettimeofday(&noticeMsgTime, 0);\r
 815         noticeMsgTime.tv_sec -= 2;\r
 816 \r
 817         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 818         reset_timing = 1;\r
 819 }\r
 820 \r
 821 static void emu_state_cb(const char *str)\r
 822 {\r
 823         clearArea(0);\r
 824         blit("", str);\r
 825 }\r
 826 \r
 827 static void RunEvents(unsigned int which)\r
 828 {\r
 829         if(which & 0x1800) { // save or load (but not both)\r
 830                 int do_it = 1;\r
 831                 if (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200) && emu_check_save_file(state_slot)) {\r
 832                         unsigned long keys;\r
 833                         blit("", "OVERWRITE SAVE? (Y=yes, X=no)");\r
 834                         while( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 835                                 usleep(50*1024);\r
 836                         if (keys & GP2X_X) do_it = 0;\r
 837                         clearArea(0);\r
 838                 }\r
 839                 if (do_it) {\r
 840                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 841                         PicoStateProgressCB = emu_state_cb;\r
 842                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 843                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 844                         PicoStateProgressCB = NULL;\r
 845                 }\r
 846 \r
 847                 reset_timing = 1;\r
 848         }\r
 849         if(which & 0x0400) { // switch renderer\r
 850                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 851                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 852                 else   currentConfig.EmuOpt &= ~0x80;\r
 853 \r
 854                 vidResetMode();\r
 855 \r
 856                 if (PicoOpt&0x10) {\r
 857                         strcpy(noticeMsg, " 8bit fast renderer");\r
 858                 } else if (currentConfig.EmuOpt&0x80) {\r
 859                         strcpy(noticeMsg, "16bit accurate renderer");\r
 860                 } else {\r
 861                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 862                 }\r
 863 \r
 864                 gettimeofday(&noticeMsgTime, 0);\r
 865         }\r
 866         if(which & 0x0300) {\r
 867                 if(which&0x0200) {\r
 868                         state_slot -= 1;\r
 869                         if(state_slot < 0) state_slot = 9;\r
 870                 } else {\r
 871                         state_slot += 1;\r
 872                         if(state_slot > 9) state_slot = 0;\r
 873                 }\r
 874                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_check_save_file(state_slot) ? "USED" : "FREE");\r
 875                 gettimeofday(&noticeMsgTime, 0);\r
 876         }\r
 877         if(which & 0x0080) {\r
 878                 engineState = PGS_Menu;\r
 879         }\r
 880 }\r
 881 \r
 882 \r
 883 static void updateMovie(void)\r
 884 {\r
 885         int offs = Pico.m.frame_count*3 + 0x40;\r
 886         if (offs+3 > movie_size) {\r
 887                 free(movie_data);\r
 888                 movie_data = 0;\r
 889                 strcpy(noticeMsg, "END OF MOVIE.");\r
 890                 printf("END OF MOVIE.\n");\r
 891                 gettimeofday(&noticeMsgTime, 0);\r
 892         } else {\r
 893                 // MXYZ SACB RLDU\r
 894                 PicoPad[0] = ~movie_data[offs]   & 0x8f; // ! SCBA RLDU\r
 895                 if(!(movie_data[offs]   & 0x10)) PicoPad[0] |= 0x40; // A\r
 896                 if(!(movie_data[offs]   & 0x20)) PicoPad[0] |= 0x10; // B\r
 897                 if(!(movie_data[offs]   & 0x40)) PicoPad[0] |= 0x20; // A\r
 898                 PicoPad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU\r
 899                 if(!(movie_data[offs+1] & 0x10)) PicoPad[1] |= 0x40; // A\r
 900                 if(!(movie_data[offs+1] & 0x20)) PicoPad[1] |= 0x10; // B\r
 901                 if(!(movie_data[offs+1] & 0x40)) PicoPad[1] |= 0x20; // A\r
 902                 PicoPad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX\r
 903                 if(!(movie_data[offs+2] & 0x01)) PicoPad[0] |= 0x0400; // X\r
 904                 if(!(movie_data[offs+2] & 0x04)) PicoPad[0] |= 0x0100; // Z\r
 905                 PicoPad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX\r
 906                 if(!(movie_data[offs+2] & 0x10)) PicoPad[1] |= 0x0400; // X\r
 907                 if(!(movie_data[offs+2] & 0x40)) PicoPad[1] |= 0x0100; // Z\r
 908         }\r
 909 }\r
 910 \r
 911 \r
 912 static void updateKeys(void)\r
 913 {\r
 914         unsigned long keys, allActions[2] = { 0, 0 }, events;\r
 915         static unsigned long prevEvents = 0;\r
 916         int joy, i;\r
 917 \r
 918         keys = gp2x_joystick_read(0);\r
 919         if (keys & GP2X_SELECT) {\r
 920                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 921                 // wait until select is released, so menu would not resume game\r
 922                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 923         }\r
 924 \r
 925         keys &= CONFIGURABLE_KEYS;\r
 926 \r
 927         for (i = 0; i < 32; i++)\r
 928         {\r
 929                 if (keys & (1 << i)) {\r
 930                         int pl, acts = currentConfig.KeyBinds[i];\r
 931                         if (!acts) continue;\r
 932                         pl = (acts >> 16) & 1;\r
 933                         if (combo_keys & (1 << i)) {\r
 934                                 int u = i+1, acts_c = acts & combo_acts;\r
 935                                 // let's try to find the other one\r
 936                                 if (acts_c)\r
 937                                         for (; u < 32; u++)\r
 938                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {\r
 939                                                         allActions[pl] |= acts_c;\r
 940                                                         keys &= ~((1 << i) | (1 << u));\r
 941                                                         break;\r
 942                                                 }\r
 943                                 // add non-combo actions if combo ones were not found\r
 944                                 if (!acts_c || u == 32)\r
 945                                         allActions[pl] |= acts & ~combo_acts;\r
 946                         } else {\r
 947                                 allActions[pl] |= acts;\r
 948                         }\r
 949                 }\r
 950         }\r
 951 \r
 952         // add joy inputs\r
 953         if (num_of_joys > 0)\r
 954         {\r
 955                 gp2x_usbjoy_update();\r
 956                 for (joy = 0; joy < num_of_joys; joy++) {\r
 957                         int keys = gp2x_usbjoy_check2(joy);\r
 958                         for (i = 0; i < 32; i++) {\r
 959                                 if (keys & (1 << i)) {\r
 960                                         int acts = currentConfig.JoyBinds[joy][i];\r
 961                                         int pl = (acts >> 16) & 1;\r
 962                                         allActions[pl] |= acts;\r
 963                                 }\r
 964                         }\r
 965                 }\r
 966         }\r
 967 \r
 968         PicoPad[0] = (unsigned short) allActions[0];\r
 969         PicoPad[1] = (unsigned short) allActions[1];\r
 970 \r
 971         events = (allActions[0] | allActions[1]) >> 16;\r
 972 \r
 973         // volume is treated in special way and triggered every frame\r
 974         if(events & 0x6000) {\r
 975                 int vol = currentConfig.volume;\r
 976                 if (events & 0x2000) {\r
 977                         if (vol < 90) vol++;\r
 978                 } else {\r
 979                         if (vol >  0) vol--;\r
 980                 }\r
 981                 gp2x_sound_volume(vol, vol);\r
 982                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 983                 gettimeofday(&noticeMsgTime, 0);\r
 984                 currentConfig.volume = vol;\r
 985         }\r
 986 \r
 987         events &= ~prevEvents;\r
 988         if (events) RunEvents(events);\r
 989         if (movie_data) updateMovie();\r
 990 \r
 991         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 992 }\r
 993 \r
 994 \r
 995 static void updateSound(int len)\r
 996 {\r
 997         if (PicoOpt&8) len<<=1;\r
 998 \r
 999         /* avoid writing audio when lagging behind to prevent audio lag */\r
1000         if (PicoSkipFrame != 2)\r
1001                 gp2x_sound_write(PsndOut, len<<1);\r
1002 }\r
1003 \r
1004 \r
1005 static void SkipFrame(int do_audio)\r
1006 {\r
1007         PicoSkipFrame=do_audio ? 1 : 2;\r
1008         PicoFrame();\r
1009         PicoSkipFrame=0;\r
1010 }\r
1011 \r
1012 \r
1013 void emu_forced_frame(void)\r
1014 {\r
1015         int po_old = PicoOpt;\r
1016 \r
1017         PicoOpt |= 0x10;\r
1018         PicoFrameFull();\r
1019 \r
1020         if (!(Pico.video.reg[12]&1)) {\r
1021                 vidCpyM2 = vidCpyM2_32col;\r
1022                 clearArea(1);\r
1023         } else  vidCpyM2 = vidCpyM2_40col;\r
1024 \r
1025         vidCpyM2((unsigned char *)gp2x_screen+320*8, framebuff+328*8);\r
1026         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
1027         gp2x_video_setpalette(localPal, 0x40);\r
1028 \r
1029         PicoOpt = po_old;\r
1030 }\r
1031 \r
1032 static void simpleWait(int thissec, int lim_time)\r
1033 {\r
1034         struct timeval tval;\r
1035 \r
1036         spend_cycles(1024);\r
1037         gettimeofday(&tval, 0);\r
1038         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1039 \r
1040         while(tval.tv_usec < lim_time)\r
1041         {\r
1042                 spend_cycles(1024);\r
1043                 gettimeofday(&tval, 0);\r
1044                 if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1045         }\r
1046 }\r
1047 \r
1048 \r
1049 void emu_Loop(void)\r
1050 {\r
1051         static int gp2x_old_clock = 200;\r
1052         static int PsndRate_old = 0, PicoOpt_old = 0, PsndLen_real = 0, pal_old = 0;\r
1053         char fpsbuff[24]; // fps count c string\r
1054         struct timeval tval; // timing\r
1055         int thissec = 0, frames_done = 0, frames_shown = 0, oldmodes = 0;\r
1056         int target_fps, target_frametime, lim_time, i;\r
1057         char *notice = 0;\r
1058 \r
1059         printf("entered emu_Loop()\n");\r
1060 \r
1061         if (gp2x_old_clock != currentConfig.CPUclock) {\r
1062                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
1063                 set_FCLK(currentConfig.CPUclock);\r
1064                 gp2x_old_clock = currentConfig.CPUclock;\r
1065                 printf(" done\n");\r
1066         }\r
1067 \r
1068         if (gp2x_old_gamma != currentConfig.gamma) {\r
1069                 set_gamma(currentConfig.gamma);\r
1070                 gp2x_old_gamma = currentConfig.gamma;\r
1071                 printf("updated gamma to %i\n", currentConfig.gamma);\r
1072         }\r
1073 \r
1074         fpsbuff[0] = 0;\r
1075 \r
1076         // make sure we are in correct mode\r
1077         vidResetMode();\r
1078         Pico.m.dirtyPal = 1;\r
1079         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
1080         find_combos();\r
1081 \r
1082         // pal/ntsc might have changed, reset related stuff\r
1083         target_fps = Pico.m.pal ? 50 : 60;\r
1084         target_frametime = 1000000/target_fps;\r
1085         reset_timing = 1;\r
1086 \r
1087         // prepare sound stuff\r
1088         if(currentConfig.EmuOpt & 4) {\r
1089                 int snd_excess_add;\r
1090                 if(PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old || crashed_940) {\r
1091                         /* if 940 is turned off, we need it to be put back to sleep */\r
1092                         if (!(PicoOpt&0x200) && ((PicoOpt^PicoOpt_old)&0x200)) {\r
1093                                 Reset940(1, 2);\r
1094                                 Pause940(1);\r
1095                         }\r
1096                         sound_rerate(1);\r
1097                 }\r
1098                 //excess_samples = PsndRate - PsndLen*target_fps;\r
1099                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
1100                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n", PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
1101                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
1102                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
1103                 PicoWriteSound = updateSound;\r
1104                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
1105                 PsndOut = sndBuffer;\r
1106                 PsndRate_old = PsndRate;\r
1107                 PsndLen_real = PsndLen;\r
1108                 PicoOpt_old  = PicoOpt;\r
1109                 pal_old = Pico.m.pal;\r
1110         } else {\r
1111                 PsndOut = 0;\r
1112         }\r
1113 \r
1114         // prepare CD buffer\r
1115         if (PicoMCD & 1) PicoCDBufferInit();\r
1116 \r
1117         // loop?\r
1118         while (engineState == PGS_Running)\r
1119         {\r
1120                 int modes;\r
1121 \r
1122                 gettimeofday(&tval, 0);\r
1123                 if(reset_timing) {\r
1124                         reset_timing = 0;\r
1125                         thissec = tval.tv_sec;\r
1126                         frames_shown = frames_done = tval.tv_usec/target_frametime;\r
1127                 }\r
1128 \r
1129                 // show notice message?\r
1130                 if(noticeMsgTime.tv_sec) {\r
1131                         static int noticeMsgSum;\r
1132                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
1133                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
1134                                 clearArea(0);\r
1135                                 notice = 0;\r
1136                         } else {\r
1137                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
1138                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
1139                                 notice = noticeMsg;\r
1140                         }\r
1141                 }\r
1142 \r
1143                 // check for mode changes\r
1144                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
1145                 if (modes != oldmodes) {\r
1146                         int scalex = 320;\r
1147                         osd_fps_x = OSD_FPS_X;\r
1148                         if (modes & 4) {\r
1149                                 vidCpyM2 = vidCpyM2_40col;\r
1150                         } else {\r
1151                                 if (PicoOpt & 0x100) {\r
1152                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
1153                                         scalex = 256;\r
1154                                         osd_fps_x = OSD_FPS_X - 64;\r
1155                                 } else {\r
1156                                         vidCpyM2 = vidCpyM2_32col;\r
1157                                 }\r
1158                         }\r
1159                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
1160                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
1161                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
1162                         oldmodes = modes;\r
1163                         clearArea(1);\r
1164                 }\r
1165 \r
1166                 // second changed?\r
1167                 if(thissec != tval.tv_sec) {\r
1168 #ifdef BENCHMARK\r
1169                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
1170                         if(++bench == 10) {\r
1171                                 bench = 0;\r
1172                                 bench_fps_s = bench_fps;\r
1173                                 bf[bfp++ & 3] = bench_fps;\r
1174                                 bench_fps = 0;\r
1175                         }\r
1176                         bench_fps += frames_shown;\r
1177                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
1178 #else\r
1179                         if(currentConfig.EmuOpt & 2)\r
1180                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
1181 #endif\r
1182                         thissec = tval.tv_sec;\r
1183 \r
1184                         if(PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
1185                                 frames_done = frames_shown = 0;\r
1186                         } else {\r
1187                                 // it is quite common for this implementation to leave 1 fame unfinished\r
1188                                 // when second changes, but we don't want buffer to starve.\r
1189                                 if(PsndOut && frames_done < target_fps && frames_done > target_fps-5) {\r
1190                                         updateKeys();\r
1191                                         SkipFrame(1); frames_done++;\r
1192                                 }\r
1193 \r
1194                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;\r
1195                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;\r
1196                                 if (frames_shown > frames_done) frames_shown = frames_done;\r
1197                         }\r
1198                 }\r
1199 #if 1\r
1200                 sprintf(fpsbuff, "%05i", Pico.m.frame_count);\r
1201 #endif\r
1202                 lim_time = (frames_done+1) * target_frametime;\r
1203                 if(currentConfig.Frameskip >= 0) { // frameskip enabled\r
1204                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
1205                                 updateKeys();\r
1206                                 SkipFrame(1); frames_done++;\r
1207                                 if (PsndOut) { // do framelimitting if sound is enabled\r
1208                                         gettimeofday(&tval, 0);\r
1209                                         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1210                                         if(tval.tv_usec < lim_time) { // we are too fast\r
1211                                                 simpleWait(thissec, lim_time);\r
1212                                         }\r
1213                                 }\r
1214                                 lim_time += target_frametime;\r
1215                         }\r
1216                 } else if(tval.tv_usec > lim_time) { // auto frameskip\r
1217                         // no time left for this frame - skip\r
1218                         if (tval.tv_usec - lim_time >= 0x300000) {\r
1219                                 /* something caused a slowdown for us (disk access? cache flush?)\r
1220                                  * try to recover by resetting timing... */\r
1221                                 reset_timing = 1;\r
1222                                 continue;\r
1223                         }\r
1224                         updateKeys();\r
1225                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); frames_done++;\r
1226                         continue;\r
1227                 }\r
1228 \r
1229                 updateKeys();\r
1230                 PicoFrame();\r
1231 \r
1232 #if 0\r
1233 if (Pico.m.frame_count == 31563) {\r
1234         FILE *f;\r
1235         f = fopen("ram_p.bin", "wb");\r
1236         if (!f) { printf("!f\n"); exit(1); }\r
1237         fwrite(Pico.ram, 1, 0x10000, f);\r
1238         fclose(f);\r
1239         exit(0);\r
1240 }\r
1241 #endif\r
1242 #if 0\r
1243                 // debug\r
1244                 {\r
1245                         #define BYTE unsigned char\r
1246                         #define WORD unsigned short\r
1247                         struct\r
1248                         {\r
1249                                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
1250                                 BYTE ColorMapType;    /* 01h  Color map type */\r
1251                                 BYTE ImageType;       /* 02h  Image type code */\r
1252                                 WORD CMapStart;       /* 03h  Color map origin */\r
1253                                 WORD CMapLength;      /* 05h  Color map length */\r
1254                                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
1255                                 WORD XOffset;         /* 08h  X origin of image */\r
1256                                 WORD YOffset;         /* 0Ah  Y origin of image */\r
1257                                 WORD Width;           /* 0Ch  Width of image */\r
1258                                 WORD Height;          /* 0Eh  Height of image */\r
1259                                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
1260                                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
1261                         } __attribute__((packed)) TGAHEAD;\r
1262                         static unsigned short oldscr[320*240];\r
1263                         FILE *f; char name[128]; int i;\r
1264 \r
1265                         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
1266                         TGAHEAD.ImageType = 2;\r
1267                         TGAHEAD.Width = 320;\r
1268                         TGAHEAD.Height = 240;\r
1269                         TGAHEAD.PixelDepth = 16;\r
1270                         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
1271 \r
1272                         #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
1273 \r
1274                         for (i = 0; i < 320*240; i++)\r
1275                                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
1276                         if (i < 320*240)\r
1277                         {\r
1278                                 for (i = 0; i < 320*240; i++)\r
1279                                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
1280                                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
1281                                 f = fopen(name, "wb");\r
1282                                 if (!f) { printf("!f\n"); exit(1); }\r
1283                                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
1284                                 fwrite(oldscr, 1, 320*240*2, f);\r
1285                                 fclose(f);\r
1286                         }\r
1287                 }\r
1288 #endif\r
1289 \r
1290                 // check time\r
1291                 gettimeofday(&tval, 0);\r
1292                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1293 \r
1294                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 0x300000) // slowdown detection\r
1295                         reset_timing = 1;\r
1296                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
1297                 {\r
1298                         // sleep if we are still too fast\r
1299                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
1300                         if(tval.tv_usec < lim_time)\r
1301                         {\r
1302                                 // we are too fast\r
1303                                 simpleWait(thissec, lim_time);\r
1304                         }\r
1305                 }\r
1306 \r
1307                 blit(fpsbuff, notice);\r
1308 \r
1309                 frames_done++; frames_shown++;\r
1310         }\r
1311 \r
1312 \r
1313         if (PicoMCD & 1) PicoCDBufferFree();\r
1314 \r
1315         // save SRAM\r
1316         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
1317                 osd_text(4, 232, "Writing SRAM/BRAM..");\r
1318                 emu_SaveLoadGame(0, 1);\r
1319                 SRam.changed = 0;\r
1320         }\r
1321 \r
1322         // if in 16bit mode, generate 8it image for menu background\r
1323         if (!(PicoOpt&0x10) && (currentConfig.EmuOpt&0x80))\r
1324                 emu_forced_frame();\r
1325 \r
1326         // for menu bg\r
1327         gp2x_memcpy_buffers((1<<2), gp2x_screen, 0, 320*240*2);\r
1328 }\r
1329 \r
1330 \r
1331 void emu_ResetGame(void)\r
1332 {\r
1333         PicoReset(0);\r
1334         reset_timing = 1;\r
1335 }\r
1336 \r
1337 \r
1338 size_t gzRead2(void *p, size_t _size, size_t _n, void *file)\r
1339 {\r
1340         return gzread(file, p, _n);\r
1341 }\r
1342 \r
1343 \r
1344 size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)\r
1345 {\r
1346         return gzwrite(file, p, _n);\r
1347 }\r
1348 \r
1349 static int try_ropen_file(const char *fname)\r
1350 {\r
1351         FILE *f;\r
1352 \r
1353         f = fopen(fname, "rb");\r
1354         if (f) {\r
1355                 fclose(f);\r
1356                 return 1;\r
1357         }\r
1358         return 0;\r
1359 }\r
1360 \r
1361 char *emu_GetSaveFName(int load, int is_sram, int slot)\r
1362 {\r
1363         static char saveFname[512];\r
1364         char ext[16];\r
1365 \r
1366         if (is_sram)\r
1367         {\r
1368                 romfname_ext(saveFname, (PicoMCD&1) ? "brm/" : "srm/", (PicoMCD&1) ? ".brm" : ".srm");\r
1369                 if (load) {\r
1370                         if (try_ropen_file(saveFname)) return saveFname;\r
1371                         // try in current dir..\r
1372                         romfname_ext(saveFname, NULL, (PicoMCD&1) ? ".brm" : ".srm");\r
1373                         if (try_ropen_file(saveFname)) return saveFname;\r
1374                         return NULL; // give up\r
1375                 }\r
1376         }\r
1377         else\r
1378         {\r
1379                 ext[0] = 0;\r
1380                 if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);\r
1381                 strcat(ext, (currentConfig.EmuOpt & 8) ? ".mds.gz" : ".mds");\r
1382 \r
1383                 romfname_ext(saveFname, "mds/", ext);\r
1384                 if (load) {\r
1385                         if (try_ropen_file(saveFname)) return saveFname;\r
1386                         romfname_ext(saveFname, NULL, ext);\r
1387                         if (try_ropen_file(saveFname)) return saveFname;\r
1388                         if (currentConfig.EmuOpt & 8) {\r
1389                                 ext[0] = 0;\r
1390                                 if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);\r
1391                                 strcat(ext, ".mds");\r
1392 \r
1393                                 romfname_ext(saveFname, "mds/", ext);\r
1394                                 if (try_ropen_file(saveFname)) return saveFname;\r
1395                                 romfname_ext(saveFname, NULL, ext);\r
1396                                 if (try_ropen_file(saveFname)) return saveFname;\r
1397                         }\r
1398                         return NULL;\r
1399                 }\r
1400         }\r
1401 \r
1402         return saveFname;\r
1403 }\r
1404 \r
1405 int emu_check_save_file(int slot)\r
1406 {\r
1407         return emu_GetSaveFName(1, 0, slot) ? 1 : 0;\r
1408 }\r
1409 \r
1410 void emu_set_save_cbs(int gz)\r
1411 {\r
1412         if (gz) {\r
1413                 areaRead  = gzRead2;\r
1414                 areaWrite = gzWrite2;\r
1415                 areaEof   = (areaeof *) gzeof;\r
1416                 areaSeek  = (areaseek *) gzseek;\r
1417                 areaClose = (areaclose *) gzclose;\r
1418         } else {\r
1419                 areaRead  = (arearw *) fread;\r
1420                 areaWrite = (arearw *) fwrite;\r
1421                 areaEof   = (areaeof *) feof;\r
1422                 areaSeek  = (areaseek *) fseek;\r
1423                 areaClose = (areaclose *) fclose;\r
1424         }\r
1425 }\r
1426 \r
1427 int emu_SaveLoadGame(int load, int sram)\r
1428 {\r
1429         int ret = 0;\r
1430         char *saveFname;\r
1431 \r
1432         // make save filename\r
1433         saveFname = emu_GetSaveFName(load, sram, state_slot);\r
1434         if (saveFname == NULL) {\r
1435                 if (!sram) {\r
1436                         strcpy(noticeMsg, load ? "LOAD FAILED (missing file)" : "SAVE FAILED  ");\r
1437                         gettimeofday(&noticeMsgTime, 0);\r
1438                 }\r
1439                 return -1;\r
1440         }\r
1441 \r
1442         printf("saveLoad (%i, %i): %s\n", load, sram, saveFname);\r
1443 \r
1444         if(sram) {\r
1445                 FILE *sramFile;\r
1446                 int sram_size;\r
1447                 unsigned char *sram_data;\r
1448                 if (PicoMCD&1) {\r
1449                         sram_size = 0x2000;\r
1450                         sram_data = Pico_mcd->bram;\r
1451                 } else {\r
1452                         sram_size = SRam.end-SRam.start+1;\r
1453                         if(SRam.reg_back & 4) sram_size=0x2000;\r
1454                         sram_data = SRam.data;\r
1455                 }\r
1456                 if(!sram_data) return 0; // SRam forcefully disabled for this game\r
1457 \r
1458                 if(load) {\r
1459                         sramFile = fopen(saveFname, "rb");\r
1460                         if(!sramFile) return -1;\r
1461                         fread(sram_data, 1, sram_size, sramFile);\r
1462                         fclose(sramFile);\r
1463                 } else {\r
1464                         // sram save needs some special processing\r
1465                         // see if we have anything to save\r
1466                         for(; sram_size > 0; sram_size--)\r
1467                                 if(sram_data[sram_size-1]) break;\r
1468 \r
1469                         if(sram_size) {\r
1470                                 sramFile = fopen(saveFname, "wb");\r
1471                                 ret = fwrite(sram_data, 1, sram_size, sramFile);\r
1472                                 ret = (ret != sram_size) ? -1 : 0;\r
1473                                 fclose(sramFile);\r
1474 #ifndef NO_SYNC\r
1475                                 sync();\r
1476 #endif\r
1477                         }\r
1478                 }\r
1479                 return ret;\r
1480         }\r
1481         else\r
1482         {\r
1483                 void *PmovFile = NULL;\r
1484                 if (strcmp(saveFname + strlen(saveFname) - 3, ".gz") == 0) {\r
1485                         if( (PmovFile = gzopen(saveFname, load ? "rb" : "wb")) ) {\r
1486                                 emu_set_save_cbs(1);\r
1487                                 if(!load) gzsetparams(PmovFile, 9, Z_DEFAULT_STRATEGY);\r
1488                         }\r
1489                 }\r
1490                 else\r
1491                 {\r
1492                         if( (PmovFile = fopen(saveFname, load ? "rb" : "wb")) ) {\r
1493                                 emu_set_save_cbs(0);\r
1494                         }\r
1495                 }\r
1496                 if(PmovFile) {\r
1497                         ret = PmovState(load ? 6 : 5, PmovFile);\r
1498                         areaClose(PmovFile);\r
1499                         PmovFile = 0;\r
1500                         if (load) Pico.m.dirtyPal=1;\r
1501 #ifndef NO_SYNC\r
1502                         else sync();\r
1503 #endif\r
1504                 }\r
1505                 else    ret = -1;\r
1506                 if (!ret)\r
1507                         strcpy(noticeMsg, load ? "GAME LOADED  " : "GAME SAVED   ");\r
1508                 else\r
1509                 {\r
1510                         strcpy(noticeMsg, load ? "LOAD FAILED  " : "SAVE FAILED  ");\r
1511                         ret = -1;\r
1512                 }\r
1513 \r
1514                 gettimeofday(&noticeMsgTime, 0);\r
1515                 return ret;\r
1516         }\r
1517 }\r