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