platform/gp2x/emu.c

   1 // (c) Copyright 2006-2007 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 "../common/arm_utils.h"\r
  22 #include "../common/fonts.h"\r
  23 #include "../common/emu.h"\r
  24 #include "cpuctrl.h"\r
  25 \r
  26 #include <Pico/PicoInt.h>\r
  27 #include <Pico/Patch.h>\r
  28 #include <zlib/zlib.h>\r
  29 \r
  30 //#define PFRAMES\r
  31 \r
  32 #ifdef BENCHMARK\r
  33 #define OSD_FPS_X 220\r
  34 #else\r
  35 #define OSD_FPS_X 260\r
  36 #endif\r
  37 \r
  38 \r
  39 int engineState;\r
  40 int select_exits = 0;\r
  41 \r
  42 char romFileName[PATH_MAX];\r
  43 \r
  44 extern int crashed_940;\r
  45 \r
  46 static short sndBuffer[2*44100/50];\r
  47 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  48 static int osd_fps_x;\r
  49 static int combo_keys = 0, combo_acts = 0;      // keys and actions which need button combos\r
  50 static int gp2x_old_gamma = 100;\r
  51 char noticeMsg[64];                     // notice msg to draw\r
  52 unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer\r
  53 int reset_timing = 0;\r
  54 \r
  55 static void emu_msg_cb(const char *msg);\r
  56 static void emu_msg_tray_open(void);\r
  57 \r
  58 \r
  59 void emu_noticeMsgUpdated(void)\r
  60 {\r
  61         gettimeofday(&noticeMsgTime, 0);\r
  62 }\r
  63 \r
  64 void emu_getMainDir(char *dst, int len)\r
  65 {\r
  66         extern char **g_argv;\r
  67         int j;\r
  68 \r
  69         strncpy(dst, g_argv[0], len);\r
  70         len -= 32; // reserve\r
  71         if (len < 0) len = 0;\r
  72         dst[len] = 0;\r
  73         for (j = strlen(dst); j > 0; j--)\r
  74                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  75 }\r
  76 \r
  77 void emu_Init(void)\r
  78 {\r
  79         // make temp buffer for alt renderer\r
  80         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  81         if (!PicoDraw2FB)\r
  82         {\r
  83                 printf("PicoDraw2FB == 0\n");\r
  84         }\r
  85 \r
  86         // make dirs for saves, cfgs, etc.\r
  87         mkdir("mds", 0777);\r
  88         mkdir("srm", 0777);\r
  89         mkdir("brm", 0777);\r
  90         mkdir("cfg", 0777);\r
  91 \r
  92         PicoInit();\r
  93         PicoMessage = emu_msg_cb;\r
  94         PicoMCDopenTray = emu_msg_tray_open;\r
  95         PicoMCDcloseTray = menu_loop_tray;\r
  96 }\r
  97 \r
  98 \r
  99 static void find_combos(void)\r
 100 {\r
 101         int act, u;\r
 102 \r
 103         // find out which keys and actions are combos\r
 104         combo_keys = combo_acts = 0;\r
 105         for (act = 0; act < 32; act++)\r
 106         {\r
 107                 int keyc = 0;\r
 108                 if (act == 16 || act == 17) continue; // player2 flag\r
 109                 for (u = 0; u < 32; u++)\r
 110                 {\r
 111                         if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;\r
 112                 }\r
 113                 if (keyc > 1)\r
 114                 {\r
 115                         // loop again and mark those keys and actions as combo\r
 116                         for (u = 0; u < 32; u++)\r
 117                         {\r
 118                                 if (currentConfig.KeyBinds[u] & (1 << act)) {\r
 119                                         combo_keys |= 1 << u;\r
 120                                         combo_acts |= 1 << act;\r
 121                                 }\r
 122                         }\r
 123                 }\r
 124         }\r
 125         // printf("combo keys/acts: %08x %08x\n", combo_keys, combo_acts);\r
 126 }\r
 127 \r
 128 \r
 129 static void scaling_update(void)\r
 130 {\r
 131         PicoOpt &= ~0x4100;\r
 132         switch (currentConfig.scaling) {\r
 133                 default: break; // off\r
 134                 case 1:  // hw hor\r
 135                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 136                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 137         }\r
 138 }\r
 139 \r
 140 \r
 141 void emu_Deinit(void)\r
 142 {\r
 143         // save SRAM\r
 144         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 145                 emu_SaveLoadGame(0, 1);\r
 146                 SRam.changed = 0;\r
 147         }\r
 148 \r
 149         if (!(currentConfig.EmuOpt & 0x20)) {\r
 150                 FILE *f = fopen(PicoConfigFile, "r+b");\r
 151                 if (!f) emu_WriteConfig(0);\r
 152                 else {\r
 153                         // if we already have config, reload it, except last ROM\r
 154                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);\r
 155                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);\r
 156                         fseek(f, 0, SEEK_SET);\r
 157                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);\r
 158                         fflush(f);\r
 159                         fclose(f);\r
 160 #ifndef NO_SYNC\r
 161                         sync();\r
 162 #endif\r
 163                 }\r
 164         }\r
 165 \r
 166         free(PicoDraw2FB);\r
 167 \r
 168         PicoExit();\r
 169 \r
 170         // restore gamma\r
 171         if (gp2x_old_gamma != 100)\r
 172                 set_gamma(100, 0);\r
 173 }\r
 174 \r
 175 void emu_setDefaultConfig(void)\r
 176 {\r
 177         memset(&currentConfig, 0, sizeof(currentConfig));\r
 178         currentConfig.lastRomFile[0] = 0;\r
 179         currentConfig.EmuOpt  = 0x1f | 0x600; // | confirm_save, cd_leds\r
 180         currentConfig.PicoOpt = 0x0f | 0xe00; // | use_940, cd_pcm, cd_cdda\r
 181         currentConfig.PsndRate = 22050; // 44100;\r
 182         currentConfig.PicoRegion = 0; // auto\r
 183         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 184         currentConfig.Frameskip = -1; // auto\r
 185         currentConfig.CPUclock = 200;\r
 186         currentConfig.volume = 50;\r
 187         currentConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 188         currentConfig.KeyBinds[ 4] = 1<<1;\r
 189         currentConfig.KeyBinds[ 2] = 1<<2;\r
 190         currentConfig.KeyBinds[ 6] = 1<<3;\r
 191         currentConfig.KeyBinds[14] = 1<<4;\r
 192         currentConfig.KeyBinds[13] = 1<<5;\r
 193         currentConfig.KeyBinds[12] = 1<<6;\r
 194         currentConfig.KeyBinds[ 8] = 1<<7;\r
 195         currentConfig.KeyBinds[15] = 1<<26; // switch rend\r
 196         currentConfig.KeyBinds[10] = 1<<27; // save state\r
 197         currentConfig.KeyBinds[11] = 1<<28; // load state\r
 198         currentConfig.KeyBinds[23] = 1<<29; // vol up\r
 199         currentConfig.KeyBinds[22] = 1<<30; // vol down\r
 200         currentConfig.gamma = 100;\r
 201         currentConfig.PicoCDBuffers = 64;\r
 202         currentConfig.scaling = 0;\r
 203 }\r
 204 \r
 205 void osd_text(int x, int y, const char *text)\r
 206 {\r
 207         int len = strlen(text)*8;\r
 208 \r
 209         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 210                 int *p, i, h;\r
 211                 x &= ~3; // align x\r
 212                 len = (len+3) >> 2;\r
 213                 for (h = 0; h < 8; h++) {\r
 214                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 215                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 216                 }\r
 217                 emu_textOut8(x, y, text);\r
 218         } else {\r
 219                 int *p, i, h;\r
 220                 x &= ~1; // align x\r
 221                 len = (len+1) >> 1;\r
 222                 for (h = 0; h < 8; h++) {\r
 223                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 224                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 225                 }\r
 226                 emu_textOut16(x, y, text);\r
 227         }\r
 228 }\r
 229 \r
 230 static void cd_leds(void)\r
 231 {\r
 232 //      static\r
 233         int old_reg;\r
 234 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 235         old_reg = Pico_mcd->s68k_regs[0];\r
 236 \r
 237         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 238                 // 8-bit modes\r
 239                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 240                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 241                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 242                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 243                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 244                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 245                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 246                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 247         } else {\r
 248                 // 16-bit modes\r
 249                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 250                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 251                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 252                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 253                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 254                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 255         }\r
 256 }\r
 257 \r
 258 static int EmuScan16(unsigned int num, void *sdata)\r
 259 {\r
 260         if (!(Pico.video.reg[1]&8)) num += 8;\r
 261         DrawLineDest = (unsigned short *) gp2x_screen + 320*(num+1);\r
 262 \r
 263         return 0;\r
 264 }\r
 265 \r
 266 static int EmuScan8(unsigned int num, void *sdata)\r
 267 {\r
 268         if (!(Pico.video.reg[1]&8)) num += 8;\r
 269         DrawLineDest = (unsigned char *)  gp2x_screen + 320*(num+1);\r
 270 \r
 271         return 0;\r
 272 }\r
 273 \r
 274 int localPal[0x100];\r
 275 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 276 \r
 277 static void blit(const char *fps, const char *notice)\r
 278 {\r
 279         int emu_opt = currentConfig.EmuOpt;\r
 280 \r
 281         if (PicoOpt&0x10) {\r
 282                 // 8bit fast renderer\r
 283                 if (Pico.m.dirtyPal) {\r
 284                         Pico.m.dirtyPal = 0;\r
 285                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 286                         // feed new palette to our device\r
 287                         gp2x_video_setpalette(localPal, 0x40);\r
 288                 }\r
 289                 vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 290         } else if (!(emu_opt&0x80)) {\r
 291                 // 8bit accurate renderer\r
 292                 if (Pico.m.dirtyPal) {\r
 293                         Pico.m.dirtyPal = 0;\r
 294                         if(Pico.video.reg[0xC]&8) { // shadow/hilight mode\r
 295                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 296                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 297                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 298                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*4);\r
 299                                 localPal[0xc0] = 0x0000c000;\r
 300                                 localPal[0xd0] = 0x00c00000;\r
 301                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 302                                 localPal[0xf0] = 0x00ffffff;\r
 303                                 gp2x_video_setpalette(localPal, 0x100);\r
 304                         } else if (rendstatus & 0x20) { // mid-frame palette changes\r
 305                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 306                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 307                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 308                                 gp2x_video_setpalette(localPal, 0xc0);\r
 309                         } else {\r
 310                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 311                                 gp2x_video_setpalette(localPal, 0x40);\r
 312                         }\r
 313                 }\r
 314         }\r
 315 \r
 316         if (notice || (emu_opt & 2)) {\r
 317                 int h = 232;\r
 318                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 319                 if (notice) osd_text(4, h, notice);\r
 320                 if (emu_opt & 2)\r
 321                         osd_text(osd_fps_x, h, fps);\r
 322         }\r
 323         if ((emu_opt & 0x400) && (PicoMCD & 1))\r
 324                 cd_leds();\r
 325 \r
 326         //gp2x_video_wait_vsync();\r
 327         gp2x_video_flip();\r
 328 \r
 329         if (!(PicoOpt&0x10)) {\r
 330                 if (!(Pico.video.reg[1]&8)) {\r
 331                         if (currentConfig.EmuOpt&0x80) {\r
 332                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 333                         } else {\r
 334                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 335                         }\r
 336                 } else {\r
 337                         DrawLineDest = gp2x_screen;\r
 338                 }\r
 339         }\r
 340 }\r
 341 \r
 342 \r
 343 // clears whole screen or just the notice area (in all buffers)\r
 344 static void clearArea(int full)\r
 345 {\r
 346         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 347                 // 8-bit renderers\r
 348                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 349                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 350         } else {\r
 351                 // 16bit accurate renderer\r
 352                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 353                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 354         }\r
 355 }\r
 356 \r
 357 \r
 358 static void vidResetMode(void)\r
 359 {\r
 360         if (PicoOpt&0x10) {\r
 361                 gp2x_video_changemode(8);\r
 362         } else if (currentConfig.EmuOpt&0x80) {\r
 363                 gp2x_video_changemode(16);\r
 364                 PicoDrawSetColorFormat(1);\r
 365                 PicoScan = EmuScan16;\r
 366                 PicoScan(0, 0);\r
 367         } else {\r
 368                 gp2x_video_changemode(8);\r
 369                 PicoDrawSetColorFormat(2);\r
 370                 PicoScan = EmuScan8;\r
 371                 PicoScan(0, 0);\r
 372         }\r
 373         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 374                 // setup pal for 8-bit modes\r
 375                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 376                 localPal[0xd0] = 0x00c00000;\r
 377                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 378                 localPal[0xf0] = 0x00ffffff;\r
 379                 gp2x_video_setpalette(localPal, 0x100);\r
 380                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 381                 gp2x_video_flip();\r
 382         }\r
 383         Pico.m.dirtyPal = 1;\r
 384         // reset scaling\r
 385         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 386              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 387         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 388 }\r
 389 \r
 390 \r
 391 static void emu_msg_cb(const char *msg)\r
 392 {\r
 393         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 394                 // 8-bit renderers\r
 395                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 396                 osd_text(4, 232, msg);\r
 397                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 398         } else {\r
 399                 // 16bit accurate renderer\r
 400                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 401                 osd_text(4, 232, msg);\r
 402                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 403         }\r
 404         gettimeofday(&noticeMsgTime, 0);\r
 405         noticeMsgTime.tv_sec -= 2;\r
 406 \r
 407         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 408         reset_timing = 1;\r
 409 }\r
 410 \r
 411 static void emu_state_cb(const char *str)\r
 412 {\r
 413         clearArea(0);\r
 414         blit("", str);\r
 415 }\r
 416 \r
 417 static void emu_msg_tray_open(void)\r
 418 {\r
 419         strcpy(noticeMsg, "CD tray opened");\r
 420         gettimeofday(&noticeMsgTime, 0);\r
 421 }\r
 422 \r
 423 static void RunEvents(unsigned int which)\r
 424 {\r
 425         if(which & 0x1800) { // save or load (but not both)\r
 426                 int do_it = 1;\r
 427                 if ( emu_checkSaveFile(state_slot) &&\r
 428                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 429                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 430                         unsigned long keys;\r
 431                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 432                         while( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 433                                 usleep(50*1024);\r
 434                         if (keys & GP2X_X) do_it = 0;\r
 435                         clearArea(0);\r
 436                 }\r
 437                 if (do_it) {\r
 438                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 439                         PicoStateProgressCB = emu_state_cb;\r
 440                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 441                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 442                         PicoStateProgressCB = NULL;\r
 443                 }\r
 444 \r
 445                 reset_timing = 1;\r
 446         }\r
 447         if(which & 0x0400) { // switch renderer\r
 448                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 449                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 450                 else   currentConfig.EmuOpt &= ~0x80;\r
 451 \r
 452                 vidResetMode();\r
 453 \r
 454                 if (PicoOpt&0x10) {\r
 455                         strcpy(noticeMsg, " 8bit fast renderer");\r
 456                 } else if (currentConfig.EmuOpt&0x80) {\r
 457                         strcpy(noticeMsg, "16bit accurate renderer");\r
 458                 } else {\r
 459                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 460                 }\r
 461 \r
 462                 gettimeofday(&noticeMsgTime, 0);\r
 463         }\r
 464         if(which & 0x0300) {\r
 465                 if(which&0x0200) {\r
 466                         state_slot -= 1;\r
 467                         if(state_slot < 0) state_slot = 9;\r
 468                 } else {\r
 469                         state_slot += 1;\r
 470                         if(state_slot > 9) state_slot = 0;\r
 471                 }\r
 472                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 473                 gettimeofday(&noticeMsgTime, 0);\r
 474         }\r
 475         if(which & 0x0080) {\r
 476                 engineState = PGS_Menu;\r
 477         }\r
 478 }\r
 479 \r
 480 \r
 481 static void updateKeys(void)\r
 482 {\r
 483         unsigned long keys, allActions[2] = { 0, 0 }, events;\r
 484         static unsigned long prevEvents = 0;\r
 485         int joy, i;\r
 486 \r
 487         keys = gp2x_joystick_read(0);\r
 488         if (keys & GP2X_SELECT) {\r
 489                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 490                 // wait until select is released, so menu would not resume game\r
 491                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 492         }\r
 493 \r
 494         keys &= CONFIGURABLE_KEYS;\r
 495 \r
 496         for (i = 0; i < 32; i++)\r
 497         {\r
 498                 if (keys & (1 << i)) {\r
 499                         int pl, acts = currentConfig.KeyBinds[i];\r
 500                         if (!acts) continue;\r
 501                         pl = (acts >> 16) & 1;\r
 502                         if (combo_keys & (1 << i)) {\r
 503                                 int u = i+1, acts_c = acts & combo_acts;\r
 504                                 // let's try to find the other one\r
 505                                 if (acts_c)\r
 506                                         for (; u < 32; u++)\r
 507                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {\r
 508                                                         allActions[pl] |= acts_c;\r
 509                                                         keys &= ~((1 << i) | (1 << u));\r
 510                                                         break;\r
 511                                                 }\r
 512                                 // add non-combo actions if combo ones were not found\r
 513                                 if (!acts_c || u == 32)\r
 514                                         allActions[pl] |= acts & ~combo_acts;\r
 515                         } else {\r
 516                                 allActions[pl] |= acts;\r
 517                         }\r
 518                 }\r
 519         }\r
 520 \r
 521         // add joy inputs\r
 522         if (num_of_joys > 0)\r
 523         {\r
 524                 gp2x_usbjoy_update();\r
 525                 for (joy = 0; joy < num_of_joys; joy++) {\r
 526                         int keys = gp2x_usbjoy_check2(joy);\r
 527                         for (i = 0; i < 32; i++) {\r
 528                                 if (keys & (1 << i)) {\r
 529                                         int acts = currentConfig.JoyBinds[joy][i];\r
 530                                         int pl = (acts >> 16) & 1;\r
 531                                         allActions[pl] |= acts;\r
 532                                 }\r
 533                         }\r
 534                 }\r
 535         }\r
 536 \r
 537         PicoPad[0] = (unsigned short) allActions[0];\r
 538         PicoPad[1] = (unsigned short) allActions[1];\r
 539 \r
 540         events = (allActions[0] | allActions[1]) >> 16;\r
 541 \r
 542         // volume is treated in special way and triggered every frame\r
 543         if(events & 0x6000) {\r
 544                 int vol = currentConfig.volume;\r
 545                 if (events & 0x2000) {\r
 546                         if (vol < 99) vol++;\r
 547                 } else {\r
 548                         if (vol >  0) vol--;\r
 549                 }\r
 550                 gp2x_sound_volume(vol, vol);\r
 551                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 552                 gettimeofday(&noticeMsgTime, 0);\r
 553                 currentConfig.volume = vol;\r
 554         }\r
 555 \r
 556         events &= ~prevEvents;\r
 557         if (events) RunEvents(events);\r
 558         if (movie_data) emu_updateMovie();\r
 559 \r
 560         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 561 }\r
 562 \r
 563 \r
 564 static void updateSound(int len)\r
 565 {\r
 566         if (PicoOpt&8) len<<=1;\r
 567 \r
 568         /* avoid writing audio when lagging behind to prevent audio lag */\r
 569         if (PicoSkipFrame != 2)\r
 570                 gp2x_sound_write(PsndOut, len<<1);\r
 571 }\r
 572 \r
 573 \r
 574 static void SkipFrame(int do_audio)\r
 575 {\r
 576         PicoSkipFrame=do_audio ? 1 : 2;\r
 577         PicoFrame();\r
 578         PicoSkipFrame=0;\r
 579 }\r
 580 \r
 581 \r
 582 void emu_forcedFrame(void)\r
 583 {\r
 584         int po_old = PicoOpt;\r
 585         int eo_old = currentConfig.EmuOpt;\r
 586 \r
 587         PicoOpt &= ~0x0010;\r
 588         PicoOpt |=  0x4080; // soft_scale | acc_sprites\r
 589         currentConfig.EmuOpt |= 0x80;\r
 590 \r
 591         //vidResetMode();\r
 592         PicoDrawSetColorFormat(1);\r
 593         PicoScan = EmuScan16;\r
 594         PicoScan(0, 0);\r
 595         Pico.m.dirtyPal = 1;\r
 596         PicoFrameDrawOnly();\r
 597 \r
 598 /*\r
 599         if (!(Pico.video.reg[12]&1)) {\r
 600                 vidCpyM2 = vidCpyM2_32col;\r
 601                 clearArea(1);\r
 602         } else  vidCpyM2 = vidCpyM2_40col;\r
 603 \r
 604         vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 605         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 606         gp2x_video_setpalette(localPal, 0x40);\r
 607 */\r
 608         PicoOpt = po_old;\r
 609         currentConfig.EmuOpt = eo_old;\r
 610 }\r
 611 \r
 612 static void simpleWait(int thissec, int lim_time)\r
 613 {\r
 614         struct timeval tval;\r
 615 \r
 616         spend_cycles(1024);\r
 617         gettimeofday(&tval, 0);\r
 618         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 619 \r
 620         while(tval.tv_usec < lim_time)\r
 621         {\r
 622                 spend_cycles(1024);\r
 623                 gettimeofday(&tval, 0);\r
 624                 if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 625         }\r
 626 }\r
 627 \r
 628 \r
 629 void emu_Loop(void)\r
 630 {\r
 631         static int gp2x_old_clock = 200;\r
 632         static int PsndRate_old = 0, PicoOpt_old = 0, EmuOpt_old = 0, pal_old = 0;\r
 633         char fpsbuff[24]; // fps count c string\r
 634         struct timeval tval; // timing\r
 635         int thissec = 0, frames_done = 0, frames_shown = 0, oldmodes = 0;\r
 636         int target_fps, target_frametime, lim_time, vsync_offset, i;\r
 637         char *notice = 0;\r
 638 \r
 639         printf("entered emu_Loop()\n");\r
 640 \r
 641         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 642                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 643                 set_FCLK(currentConfig.CPUclock);\r
 644                 gp2x_old_clock = currentConfig.CPUclock;\r
 645                 printf(" done\n");\r
 646         }\r
 647 \r
 648         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 649                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 650                 gp2x_old_gamma = currentConfig.gamma;\r
 651                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 652         }\r
 653 \r
 654         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 655                 if (currentConfig.EmuOpt&0x2000)\r
 656                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 657                 else unset_LCD_custom_rate();\r
 658         }\r
 659 \r
 660         EmuOpt_old = currentConfig.EmuOpt;\r
 661         fpsbuff[0] = 0;\r
 662 \r
 663         // make sure we are in correct mode\r
 664         vidResetMode();\r
 665         scaling_update();\r
 666         Pico.m.dirtyPal = 1;\r
 667         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 668         find_combos();\r
 669 \r
 670         // pal/ntsc might have changed, reset related stuff\r
 671         target_fps = Pico.m.pal ? 50 : 60;\r
 672         target_frametime = 1000000/target_fps;\r
 673         reset_timing = 1;\r
 674 \r
 675         // prepare sound stuff\r
 676         if(currentConfig.EmuOpt & 4) {\r
 677                 int snd_excess_add;\r
 678                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 679                                 ((PicoOpt&0x200) && crashed_940)) {\r
 680                         /* if 940 is turned off, we need it to be put back to sleep */\r
 681                         if (!(PicoOpt&0x200) && ((PicoOpt^PicoOpt_old)&0x200)) {\r
 682                                 Reset940(1, 2);\r
 683                                 Pause940(1);\r
 684                         }\r
 685                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 686                 }\r
 687                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 688                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 689                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 690                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
 691                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
 692                 PicoWriteSound = updateSound;\r
 693                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 694                 PsndOut = sndBuffer;\r
 695                 PsndRate_old = PsndRate;\r
 696                 PicoOpt_old  = PicoOpt;\r
 697                 pal_old = Pico.m.pal;\r
 698         } else {\r
 699                 PsndOut = 0;\r
 700         }\r
 701 \r
 702         // prepare CD buffer\r
 703         if (PicoMCD & 1) PicoCDBufferInit();\r
 704 \r
 705         // calc vsync offset to sync timing code with vsync\r
 706         if (currentConfig.EmuOpt&0x2000) {\r
 707                 gettimeofday(&tval, 0);\r
 708                 gp2x_video_wait_vsync();\r
 709                 gettimeofday(&tval, 0);\r
 710                 vsync_offset = tval.tv_usec;\r
 711                 while (vsync_offset >= target_frametime)\r
 712                         vsync_offset -= target_frametime;\r
 713                 if (!vsync_offset) vsync_offset++;\r
 714                 printf("vsync_offset: %i\n", vsync_offset);\r
 715         } else\r
 716                 vsync_offset = 0;\r
 717 \r
 718         // loop?\r
 719         while (engineState == PGS_Running)\r
 720         {\r
 721                 int modes;\r
 722 \r
 723                 gettimeofday(&tval, 0);\r
 724                 if(reset_timing) {\r
 725                         reset_timing = 0;\r
 726                         thissec = tval.tv_sec;\r
 727                         frames_shown = frames_done = tval.tv_usec/target_frametime;\r
 728                 }\r
 729 \r
 730                 // show notice message?\r
 731                 if(noticeMsgTime.tv_sec) {\r
 732                         static int noticeMsgSum;\r
 733                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 734                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 735                                 clearArea(0);\r
 736                                 notice = 0;\r
 737                         } else {\r
 738                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 739                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 740                                 notice = noticeMsg;\r
 741                         }\r
 742                 }\r
 743 \r
 744                 // check for mode changes\r
 745                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 746                 if (modes != oldmodes) {\r
 747                         int scalex = 320;\r
 748                         osd_fps_x = OSD_FPS_X;\r
 749                         if (modes & 4) {\r
 750                                 vidCpyM2 = vidCpyM2_40col;\r
 751                         } else {\r
 752                                 if (PicoOpt & 0x100) {\r
 753                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 754                                         scalex = 256;\r
 755                                         osd_fps_x = OSD_FPS_X - 64;\r
 756                                 } else {\r
 757                                         vidCpyM2 = vidCpyM2_32col;\r
 758                                 }\r
 759                         }\r
 760                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 761                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 762                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 763                         oldmodes = modes;\r
 764                         clearArea(1);\r
 765                 }\r
 766 \r
 767                 // second changed?\r
 768                 if(thissec != tval.tv_sec) {\r
 769 #ifdef BENCHMARK\r
 770                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 771                         if(++bench == 10) {\r
 772                                 bench = 0;\r
 773                                 bench_fps_s = bench_fps;\r
 774                                 bf[bfp++ & 3] = bench_fps;\r
 775                                 bench_fps = 0;\r
 776                         }\r
 777                         bench_fps += frames_shown;\r
 778                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 779 #else\r
 780                         if(currentConfig.EmuOpt & 2)\r
 781                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 782 #endif\r
 783                         thissec = tval.tv_sec;\r
 784 \r
 785                         if(PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 786                                 frames_done = frames_shown = 0;\r
 787                         } else {\r
 788                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 789                                 // when second changes, but we don't want buffer to starve.\r
 790                                 if(PsndOut && frames_done < target_fps && frames_done > target_fps-5) {\r
 791                                         updateKeys();\r
 792                                         SkipFrame(1); frames_done++;\r
 793                                 }\r
 794 \r
 795                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;\r
 796                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;\r
 797                                 if (frames_shown > frames_done) frames_shown = frames_done;\r
 798                         }\r
 799                 }\r
 800 #ifdef PFRAMES\r
 801                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 802 #endif\r
 803 \r
 804                 lim_time = (frames_done+1) * target_frametime + vsync_offset;\r
 805                 if(currentConfig.Frameskip >= 0) { // frameskip enabled\r
 806                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 807                                 updateKeys();\r
 808                                 SkipFrame(1); frames_done++;\r
 809                                 if (PsndOut) { // do framelimitting if sound is enabled\r
 810                                         gettimeofday(&tval, 0);\r
 811                                         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 812                                         if(tval.tv_usec < lim_time) { // we are too fast\r
 813                                                 simpleWait(thissec, lim_time);\r
 814                                         }\r
 815                                 }\r
 816                                 lim_time += target_frametime;\r
 817                         }\r
 818                 } else if(tval.tv_usec > lim_time) { // auto frameskip\r
 819                         // no time left for this frame - skip\r
 820                         if (tval.tv_usec - lim_time >= 300000) {\r
 821                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 822                                  * try to recover by resetting timing... */\r
 823                                 reset_timing = 1;\r
 824                                 continue;\r
 825                         }\r
 826                         updateKeys();\r
 827                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); frames_done++;\r
 828                         continue;\r
 829                 }\r
 830 \r
 831                 updateKeys();\r
 832                 PicoFrame();\r
 833 \r
 834 #if 0\r
 835 if (Pico.m.frame_count == 31563) {\r
 836         FILE *f;\r
 837         f = fopen("ram_p.bin", "wb");\r
 838         if (!f) { printf("!f\n"); exit(1); }\r
 839         fwrite(Pico.ram, 1, 0x10000, f);\r
 840         fclose(f);\r
 841         exit(0);\r
 842 }\r
 843 #endif\r
 844 #if 0\r
 845                 // debug\r
 846                 {\r
 847                         #define BYTE unsigned char\r
 848                         #define WORD unsigned short\r
 849                         struct\r
 850                         {\r
 851                                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 852                                 BYTE ColorMapType;    /* 01h  Color map type */\r
 853                                 BYTE ImageType;       /* 02h  Image type code */\r
 854                                 WORD CMapStart;       /* 03h  Color map origin */\r
 855                                 WORD CMapLength;      /* 05h  Color map length */\r
 856                                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 857                                 WORD XOffset;         /* 08h  X origin of image */\r
 858                                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 859                                 WORD Width;           /* 0Ch  Width of image */\r
 860                                 WORD Height;          /* 0Eh  Height of image */\r
 861                                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 862                                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 863                         } __attribute__((packed)) TGAHEAD;\r
 864                         static unsigned short oldscr[320*240];\r
 865                         FILE *f; char name[128]; int i;\r
 866 \r
 867                         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 868                         TGAHEAD.ImageType = 2;\r
 869                         TGAHEAD.Width = 320;\r
 870                         TGAHEAD.Height = 240;\r
 871                         TGAHEAD.PixelDepth = 16;\r
 872                         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 873 \r
 874                         #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 875 \r
 876                         for (i = 0; i < 320*240; i++)\r
 877                                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
 878                         if (i < 320*240)\r
 879                         {\r
 880                                 for (i = 0; i < 320*240; i++)\r
 881                                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
 882                                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 883                                 f = fopen(name, "wb");\r
 884                                 if (!f) { printf("!f\n"); exit(1); }\r
 885                                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 886                                 fwrite(oldscr, 1, 320*240*2, f);\r
 887                                 fclose(f);\r
 888                         }\r
 889                 }\r
 890 #endif\r
 891 \r
 892                 // check time\r
 893                 gettimeofday(&tval, 0);\r
 894                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 895 \r
 896                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 897                         reset_timing = 1;\r
 898                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 899                 {\r
 900                         // sleep or vsync if we are still too fast\r
 901                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 902                         if(tval.tv_usec < lim_time)\r
 903                         {\r
 904                                 // we are too fast\r
 905                                 if (vsync_offset) {\r
 906                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 907                                                 simpleWait(thissec, lim_time - target_frametime/4);\r
 908                                         gp2x_video_wait_vsync();\r
 909                                 } else {\r
 910                                         simpleWait(thissec, lim_time);\r
 911                                 }\r
 912                         }\r
 913                 }\r
 914 \r
 915                 blit(fpsbuff, notice);\r
 916 \r
 917                 frames_done++; frames_shown++;\r
 918         }\r
 919 \r
 920 \r
 921         if (PicoMCD & 1) PicoCDBufferFree();\r
 922 \r
 923         // save SRAM\r
 924         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 925                 emu_state_cb("Writing SRAM/BRAM..");\r
 926                 emu_SaveLoadGame(0, 1);\r
 927                 SRam.changed = 0;\r
 928         }\r
 929 \r
 930         // if in 8bit mode, generate 16bit image for menu background\r
 931         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
 932                 emu_forcedFrame();\r
 933 }\r
 934 \r
 935 \r
 936 void emu_ResetGame(void)\r
 937 {\r
 938         PicoReset(0);\r
 939         reset_timing = 1;\r
 940 }\r
 941 \r
 942 \r