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