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 <Pico/sound/mix.h>\r
  29 #include <zlib/zlib.h>\r
  30 \r
  31 //#define PFRAMES\r
  32 \r
  33 #ifdef BENCHMARK\r
  34 #define OSD_FPS_X 220\r
  35 #else\r
  36 #define OSD_FPS_X 260\r
  37 #endif\r
  38 \r
  39 \r
  40 int engineState;\r
  41 int select_exits = 0;\r
  42 \r
  43 char romFileName[PATH_MAX];\r
  44 \r
  45 extern int crashed_940;\r
  46 \r
  47 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
  48 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  49 static int osd_fps_x;\r
  50 static int combo_keys = 0, combo_acts = 0;      // keys and actions which need button combos\r
  51 static int gp2x_old_gamma = 100;\r
  52 char noticeMsg[64];                     // notice msg to draw\r
  53 unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer\r
  54 int reset_timing = 0;\r
  55 \r
  56 static void emu_msg_cb(const char *msg);\r
  57 static void emu_msg_tray_open(void);\r
  58 \r
  59 \r
  60 void emu_noticeMsgUpdated(void)\r
  61 {\r
  62         gettimeofday(&noticeMsgTime, 0);\r
  63 }\r
  64 \r
  65 void emu_getMainDir(char *dst, int len)\r
  66 {\r
  67         extern char **g_argv;\r
  68         int j;\r
  69 \r
  70         strncpy(dst, g_argv[0], len);\r
  71         len -= 32; // reserve\r
  72         if (len < 0) len = 0;\r
  73         dst[len] = 0;\r
  74         for (j = strlen(dst); j > 0; j--)\r
  75                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  76 }\r
  77 \r
  78 void emu_Init(void)\r
  79 {\r
  80         // make temp buffer for alt renderer\r
  81         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  82         if (!PicoDraw2FB)\r
  83         {\r
  84                 printf("PicoDraw2FB == 0\n");\r
  85         }\r
  86 \r
  87         // make dirs for saves, cfgs, etc.\r
  88         mkdir("mds", 0777);\r
  89         mkdir("srm", 0777);\r
  90         mkdir("brm", 0777);\r
  91         mkdir("cfg", 0777);\r
  92 \r
  93         PicoInit();\r
  94         PicoMessage = emu_msg_cb;\r
  95         PicoMCDopenTray = emu_msg_tray_open;\r
  96         PicoMCDcloseTray = menu_loop_tray;\r
  97 }\r
  98 \r
  99 \r
 100 static void find_combos(void)\r
 101 {\r
 102         int act, u;\r
 103 \r
 104         // find out which keys and actions are combos\r
 105         combo_keys = combo_acts = 0;\r
 106         for (act = 0; act < 32; act++)\r
 107         {\r
 108                 int keyc = 0, keyc2 = 0;\r
 109                 if (act == 16 || act == 17) continue; // player2 flag\r
 110                 if (act > 17)\r
 111                 {\r
 112                         for (u = 0; u < 32; u++)\r
 113                                 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;\r
 114                 }\r
 115                 else\r
 116                 {\r
 117                         for (u = 0; u < 32; u++)\r
 118                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 0 && // pl. 1\r
 119                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc++;\r
 120                         for (u = 0; u < 32; u++)\r
 121                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 1 && // pl. 2\r
 122                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc2++;\r
 123                         if (keyc2 > keyc) keyc = keyc2;\r
 124                 }\r
 125                 if (keyc > 1)\r
 126                 {\r
 127                         // loop again and mark those keys and actions as combo\r
 128                         for (u = 0; u < 32; u++)\r
 129                         {\r
 130                                 if (currentConfig.KeyBinds[u] & (1 << act)) {\r
 131                                         combo_keys |= 1 << u;\r
 132                                         combo_acts |= 1 << act;\r
 133                                 }\r
 134                         }\r
 135                 }\r
 136         }\r
 137 \r
 138         // printf("combo keys/acts: %08x %08x\n", combo_keys, combo_acts);\r
 139 }\r
 140 \r
 141 \r
 142 static void scaling_update(void)\r
 143 {\r
 144         PicoOpt &= ~0x4100;\r
 145         switch (currentConfig.scaling) {\r
 146                 default: break; // off\r
 147                 case 1:  // hw hor\r
 148                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 149                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 150         }\r
 151 }\r
 152 \r
 153 \r
 154 void emu_Deinit(void)\r
 155 {\r
 156         // save SRAM\r
 157         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 158                 emu_SaveLoadGame(0, 1);\r
 159                 SRam.changed = 0;\r
 160         }\r
 161 \r
 162         if (!(currentConfig.EmuOpt & 0x20)) {\r
 163                 FILE *f = fopen(PicoConfigFile, "r+b");\r
 164                 if (!f) emu_WriteConfig(0);\r
 165                 else {\r
 166                         // if we already have config, reload it, except last ROM\r
 167                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);\r
 168                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);\r
 169                         fseek(f, 0, SEEK_SET);\r
 170                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);\r
 171                         fflush(f);\r
 172                         fclose(f);\r
 173 #ifndef NO_SYNC\r
 174                         sync();\r
 175 #endif\r
 176                 }\r
 177         }\r
 178 \r
 179         free(PicoDraw2FB);\r
 180 \r
 181         PicoExit();\r
 182 \r
 183         // restore gamma\r
 184         if (gp2x_old_gamma != 100)\r
 185                 set_gamma(100, 0);\r
 186 }\r
 187 \r
 188 void emu_setDefaultConfig(void)\r
 189 {\r
 190         memset(&currentConfig, 0, sizeof(currentConfig));\r
 191         currentConfig.lastRomFile[0] = 0;\r
 192         currentConfig.EmuOpt  = 0x1f | 0x600; // | confirm_save, cd_leds\r
 193         currentConfig.PicoOpt = 0x0f | 0xe00; // | use_940, cd_pcm, cd_cdda\r
 194         currentConfig.PsndRate = 22050; // 44100;\r
 195         currentConfig.PicoRegion = 0; // auto\r
 196         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 197         currentConfig.Frameskip = -1; // auto\r
 198         currentConfig.CPUclock = 200;\r
 199         currentConfig.volume = 50;\r
 200         currentConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 201         currentConfig.KeyBinds[ 4] = 1<<1;\r
 202         currentConfig.KeyBinds[ 2] = 1<<2;\r
 203         currentConfig.KeyBinds[ 6] = 1<<3;\r
 204         currentConfig.KeyBinds[14] = 1<<4;\r
 205         currentConfig.KeyBinds[13] = 1<<5;\r
 206         currentConfig.KeyBinds[12] = 1<<6;\r
 207         currentConfig.KeyBinds[ 8] = 1<<7;\r
 208         currentConfig.KeyBinds[15] = 1<<26; // switch rend\r
 209         currentConfig.KeyBinds[10] = 1<<27; // save state\r
 210         currentConfig.KeyBinds[11] = 1<<28; // load state\r
 211         currentConfig.KeyBinds[23] = 1<<29; // vol up\r
 212         currentConfig.KeyBinds[22] = 1<<30; // vol down\r
 213         currentConfig.gamma = 100;\r
 214         currentConfig.PicoCDBuffers = 64;\r
 215         currentConfig.scaling = 0;\r
 216 }\r
 217 \r
 218 void osd_text(int x, int y, const char *text)\r
 219 {\r
 220         int len = strlen(text)*8;\r
 221 \r
 222         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 223                 int *p, i, h;\r
 224                 x &= ~3; // align x\r
 225                 len = (len+3) >> 2;\r
 226                 for (h = 0; h < 8; h++) {\r
 227                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 228                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 229                 }\r
 230                 emu_textOut8(x, y, text);\r
 231         } else {\r
 232                 int *p, i, h;\r
 233                 x &= ~1; // align x\r
 234                 len = (len+1) >> 1;\r
 235                 for (h = 0; h < 8; h++) {\r
 236                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 237                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 238                 }\r
 239                 emu_textOut16(x, y, text);\r
 240         }\r
 241 }\r
 242 \r
 243 static void cd_leds(void)\r
 244 {\r
 245 //      static\r
 246         int old_reg;\r
 247 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 248         old_reg = Pico_mcd->s68k_regs[0];\r
 249 \r
 250         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 251                 // 8-bit modes\r
 252                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 253                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 254                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 255                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 256                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 257                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 258                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 259                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 260         } else {\r
 261                 // 16-bit modes\r
 262                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 263                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 264                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 265                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 266                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 267                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 268         }\r
 269 }\r
 270 \r
 271 static int EmuScan16(unsigned int num, void *sdata)\r
 272 {\r
 273         if (!(Pico.video.reg[1]&8)) num += 8;\r
 274         DrawLineDest = (unsigned short *) gp2x_screen + 320*(num+1);\r
 275 \r
 276         return 0;\r
 277 }\r
 278 \r
 279 static int EmuScan8(unsigned int num, void *sdata)\r
 280 {\r
 281         if (!(Pico.video.reg[1]&8)) num += 8;\r
 282         DrawLineDest = (unsigned char *)  gp2x_screen + 320*(num+1);\r
 283 \r
 284         return 0;\r
 285 }\r
 286 \r
 287 int localPal[0x100];\r
 288 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 289 \r
 290 static void blit(const char *fps, const char *notice)\r
 291 {\r
 292         int emu_opt = currentConfig.EmuOpt;\r
 293 \r
 294         if (PicoOpt&0x10) {\r
 295                 // 8bit fast renderer\r
 296                 if (Pico.m.dirtyPal) {\r
 297                         Pico.m.dirtyPal = 0;\r
 298                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 299                         // feed new palette to our device\r
 300                         gp2x_video_setpalette(localPal, 0x40);\r
 301                 }\r
 302                 vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 303         } else if (!(emu_opt&0x80)) {\r
 304                 // 8bit accurate renderer\r
 305                 if (Pico.m.dirtyPal) {\r
 306                         Pico.m.dirtyPal = 0;\r
 307                         if(Pico.video.reg[0xC]&8) { // shadow/hilight mode\r
 308                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 309                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 310                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 311                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*4);\r
 312                                 localPal[0xc0] = 0x0000c000;\r
 313                                 localPal[0xd0] = 0x00c00000;\r
 314                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 315                                 localPal[0xf0] = 0x00ffffff;\r
 316                                 gp2x_video_setpalette(localPal, 0x100);\r
 317                         } else if (rendstatus & 0x20) { // mid-frame palette changes\r
 318                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 319                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 320                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 321                                 gp2x_video_setpalette(localPal, 0xc0);\r
 322                         } else {\r
 323                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 324                                 gp2x_video_setpalette(localPal, 0x40);\r
 325                         }\r
 326                 }\r
 327         }\r
 328 \r
 329         if (notice || (emu_opt & 2)) {\r
 330                 int h = 232;\r
 331                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 332                 if (notice) osd_text(4, h, notice);\r
 333                 if (emu_opt & 2)\r
 334                         osd_text(osd_fps_x, h, fps);\r
 335         }\r
 336         if ((emu_opt & 0x400) && (PicoMCD & 1))\r
 337                 cd_leds();\r
 338 \r
 339         //gp2x_video_wait_vsync();\r
 340         gp2x_video_flip();\r
 341 \r
 342         if (!(PicoOpt&0x10)) {\r
 343                 if (!(Pico.video.reg[1]&8)) {\r
 344                         if (currentConfig.EmuOpt&0x80) {\r
 345                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 346                         } else {\r
 347                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 348                         }\r
 349                 } else {\r
 350                         DrawLineDest = gp2x_screen;\r
 351                 }\r
 352         }\r
 353 }\r
 354 \r
 355 \r
 356 // clears whole screen or just the notice area (in all buffers)\r
 357 static void clearArea(int full)\r
 358 {\r
 359         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 360                 // 8-bit renderers\r
 361                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 362                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 363         } else {\r
 364                 // 16bit accurate renderer\r
 365                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 366                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 367         }\r
 368 }\r
 369 \r
 370 \r
 371 static void vidResetMode(void)\r
 372 {\r
 373         if (PicoOpt&0x10) {\r
 374                 gp2x_video_changemode(8);\r
 375         } else if (currentConfig.EmuOpt&0x80) {\r
 376                 gp2x_video_changemode(16);\r
 377                 PicoDrawSetColorFormat(1);\r
 378                 PicoScan = EmuScan16;\r
 379                 PicoScan(0, 0);\r
 380         } else {\r
 381                 gp2x_video_changemode(8);\r
 382                 PicoDrawSetColorFormat(2);\r
 383                 PicoScan = EmuScan8;\r
 384                 PicoScan(0, 0);\r
 385         }\r
 386         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 387                 // setup pal for 8-bit modes\r
 388                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 389                 localPal[0xd0] = 0x00c00000;\r
 390                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 391                 localPal[0xf0] = 0x00ffffff;\r
 392                 gp2x_video_setpalette(localPal, 0x100);\r
 393                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 394                 gp2x_video_flip();\r
 395         }\r
 396         Pico.m.dirtyPal = 1;\r
 397         // reset scaling\r
 398         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 399              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 400         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 401 }\r
 402 \r
 403 \r
 404 static void emu_msg_cb(const char *msg)\r
 405 {\r
 406         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 407                 // 8-bit renderers\r
 408                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 409                 osd_text(4, 232, msg);\r
 410                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 411         } else {\r
 412                 // 16bit accurate renderer\r
 413                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 414                 osd_text(4, 232, msg);\r
 415                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 416         }\r
 417         gettimeofday(&noticeMsgTime, 0);\r
 418         noticeMsgTime.tv_sec -= 2;\r
 419 \r
 420         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 421         reset_timing = 1;\r
 422 }\r
 423 \r
 424 static void emu_state_cb(const char *str)\r
 425 {\r
 426         clearArea(0);\r
 427         blit("", str);\r
 428 }\r
 429 \r
 430 static void emu_msg_tray_open(void)\r
 431 {\r
 432         strcpy(noticeMsg, "CD tray opened");\r
 433         gettimeofday(&noticeMsgTime, 0);\r
 434 }\r
 435 \r
 436 static void update_volume(int has_changed, int is_up)\r
 437 {\r
 438         static int prev_frame = 0, wait_frames = 0;\r
 439         int vol = currentConfig.volume;\r
 440 \r
 441         if (has_changed)\r
 442         {\r
 443                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 444                         wait_frames++;\r
 445                 else {\r
 446                         if (is_up) {\r
 447                                 if (vol < 99) vol++;\r
 448                         } else {\r
 449                                 if (vol >  0) vol--;\r
 450                         }\r
 451                         wait_frames = 0;\r
 452                         gp2x_sound_volume(vol, vol);\r
 453                         currentConfig.volume = vol;\r
 454                 }\r
 455                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 456                 gettimeofday(&noticeMsgTime, 0);\r
 457                 prev_frame = Pico.m.frame_count;\r
 458         }\r
 459 \r
 460         // set the right mixer func\r
 461         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 462         if (vol >= 5)\r
 463                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 464         else {\r
 465                 mix_32_to_16l_level = 5 - vol;\r
 466                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 467         }\r
 468 }\r
 469 \r
 470 static void change_fast_forward(int set_on)\r
 471 {\r
 472         static void *set_PsndOut = NULL;\r
 473         static int set_Frameskip, set_EmuOpt, is_on = 0;\r
 474 \r
 475         if (set_on && !is_on) {\r
 476                 set_PsndOut = PsndOut;\r
 477                 set_Frameskip = currentConfig.Frameskip;\r
 478                 set_EmuOpt = currentConfig.EmuOpt;\r
 479                 PsndOut = NULL;\r
 480                 currentConfig.Frameskip = 8;\r
 481                 currentConfig.EmuOpt &= ~4;\r
 482                 is_on = 1;\r
 483         }\r
 484         else if (!set_on && is_on) {\r
 485                 PsndOut = set_PsndOut;\r
 486                 currentConfig.Frameskip = set_Frameskip;\r
 487                 currentConfig.EmuOpt = set_EmuOpt;\r
 488                 PsndRerate(1);\r
 489                 update_volume(0, 0);\r
 490                 reset_timing = 1;\r
 491                 is_on = 0;\r
 492         }\r
 493 }\r
 494 \r
 495 static void RunEvents(unsigned int which)\r
 496 {\r
 497         if (which & 0x1800) // save or load (but not both)\r
 498         {\r
 499                 int do_it = 1;\r
 500                 if ( emu_checkSaveFile(state_slot) &&\r
 501                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 502                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 503                         unsigned long keys;\r
 504                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 505                         while( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 506                                 usleep(50*1024);\r
 507                         if (keys & GP2X_X) do_it = 0;\r
 508                         clearArea(0);\r
 509                 }\r
 510                 if (do_it) {\r
 511                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 512                         PicoStateProgressCB = emu_state_cb;\r
 513                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 514                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 515                         PicoStateProgressCB = NULL;\r
 516                 }\r
 517 \r
 518                 reset_timing = 1;\r
 519         }\r
 520         if (which & 0x0400) // switch renderer\r
 521         {\r
 522                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 523                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 524                 else   currentConfig.EmuOpt &= ~0x80;\r
 525 \r
 526                 vidResetMode();\r
 527 \r
 528                 if (PicoOpt&0x10) {\r
 529                         strcpy(noticeMsg, " 8bit fast renderer");\r
 530                 } else if (currentConfig.EmuOpt&0x80) {\r
 531                         strcpy(noticeMsg, "16bit accurate renderer");\r
 532                 } else {\r
 533                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 534                 }\r
 535 \r
 536                 gettimeofday(&noticeMsgTime, 0);\r
 537         }\r
 538         if (which & 0x0300)\r
 539         {\r
 540                 if(which&0x0200) {\r
 541                         state_slot -= 1;\r
 542                         if(state_slot < 0) state_slot = 9;\r
 543                 } else {\r
 544                         state_slot += 1;\r
 545                         if(state_slot > 9) state_slot = 0;\r
 546                 }\r
 547                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 548                 gettimeofday(&noticeMsgTime, 0);\r
 549         }\r
 550         if (which & 0x0080) {\r
 551                 engineState = PGS_Menu;\r
 552         }\r
 553 }\r
 554 \r
 555 \r
 556 static void updateKeys(void)\r
 557 {\r
 558         unsigned long keys, allActions[2] = { 0, 0 }, events;\r
 559         static unsigned long prevEvents = 0;\r
 560         int joy, i;\r
 561 \r
 562         keys = gp2x_joystick_read(0);\r
 563         if (keys & GP2X_SELECT) {\r
 564                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 565                 // wait until select is released, so menu would not resume game\r
 566                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 567         }\r
 568 \r
 569         keys &= CONFIGURABLE_KEYS;\r
 570 \r
 571         for (i = 0; i < 32; i++)\r
 572         {\r
 573                 if (keys & (1 << i)) {\r
 574                         int pl, acts = currentConfig.KeyBinds[i];\r
 575                         if (!acts) continue;\r
 576                         pl = (acts >> 16) & 1;\r
 577                         if (combo_keys & (1 << i)) {\r
 578                                 int u = i+1, acts_c = acts & combo_acts;\r
 579                                 // let's try to find the other one\r
 580                                 if (acts_c)\r
 581                                         for (; u < 32; u++)\r
 582                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {\r
 583                                                         allActions[pl] |= acts_c;\r
 584                                                         keys &= ~((1 << i) | (1 << u));\r
 585                                                         break;\r
 586                                                 }\r
 587                                 // add non-combo actions if combo ones were not found\r
 588                                 if (!acts_c || u == 32)\r
 589                                         allActions[pl] |= acts & ~combo_acts;\r
 590                         } else {\r
 591                                 allActions[pl] |= acts;\r
 592                         }\r
 593                 }\r
 594         }\r
 595 \r
 596         // add joy inputs\r
 597         if (num_of_joys > 0)\r
 598         {\r
 599                 gp2x_usbjoy_update();\r
 600                 for (joy = 0; joy < num_of_joys; joy++) {\r
 601                         int keys = gp2x_usbjoy_check2(joy);\r
 602                         for (i = 0; i < 32; i++) {\r
 603                                 if (keys & (1 << i)) {\r
 604                                         int acts = currentConfig.JoyBinds[joy][i];\r
 605                                         int pl = (acts >> 16) & 1;\r
 606                                         allActions[pl] |= acts;\r
 607                                 }\r
 608                         }\r
 609                 }\r
 610         }\r
 611 \r
 612         PicoPad[0] = (unsigned short) allActions[0];\r
 613         PicoPad[1] = (unsigned short) allActions[1];\r
 614 \r
 615         events = (allActions[0] | allActions[1]) >> 16;\r
 616 \r
 617         // volume is treated in special way and triggered every frame\r
 618         if (events & 0x6000)\r
 619                 update_volume(1, events & 0x2000);\r
 620 \r
 621         if ((events ^ prevEvents) & 0x40)\r
 622                 change_fast_forward(events & 0x40);\r
 623 \r
 624         events &= ~prevEvents;\r
 625         if (events) RunEvents(events);\r
 626         if (movie_data) emu_updateMovie();\r
 627 \r
 628         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 629 }\r
 630 \r
 631 \r
 632 static void updateSound(int len)\r
 633 {\r
 634         if (PicoOpt&8) len<<=1;\r
 635 \r
 636         /* avoid writing audio when lagging behind to prevent audio lag */\r
 637         if (PicoSkipFrame != 2)\r
 638                 gp2x_sound_write(PsndOut, len<<1);\r
 639 }\r
 640 \r
 641 \r
 642 static void SkipFrame(int do_audio)\r
 643 {\r
 644         PicoSkipFrame=do_audio ? 1 : 2;\r
 645         PicoFrame();\r
 646         PicoSkipFrame=0;\r
 647 }\r
 648 \r
 649 \r
 650 void emu_forcedFrame(void)\r
 651 {\r
 652         int po_old = PicoOpt;\r
 653         int eo_old = currentConfig.EmuOpt;\r
 654 \r
 655         PicoOpt &= ~0x0010;\r
 656         PicoOpt |=  0x4080; // soft_scale | acc_sprites\r
 657         currentConfig.EmuOpt |= 0x80;\r
 658 \r
 659         //vidResetMode();\r
 660         PicoDrawSetColorFormat(1);\r
 661         PicoScan = EmuScan16;\r
 662         PicoScan(0, 0);\r
 663         Pico.m.dirtyPal = 1;\r
 664         PicoFrameDrawOnly();\r
 665 \r
 666 /*\r
 667         if (!(Pico.video.reg[12]&1)) {\r
 668                 vidCpyM2 = vidCpyM2_32col;\r
 669                 clearArea(1);\r
 670         } else  vidCpyM2 = vidCpyM2_40col;\r
 671 \r
 672         vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 673         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 674         gp2x_video_setpalette(localPal, 0x40);\r
 675 */\r
 676         PicoOpt = po_old;\r
 677         currentConfig.EmuOpt = eo_old;\r
 678 }\r
 679 \r
 680 static void simpleWait(int thissec, int lim_time)\r
 681 {\r
 682         struct timeval tval;\r
 683 \r
 684         spend_cycles(1024);\r
 685         gettimeofday(&tval, 0);\r
 686         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 687 \r
 688         while(tval.tv_usec < lim_time)\r
 689         {\r
 690                 spend_cycles(1024);\r
 691                 gettimeofday(&tval, 0);\r
 692                 if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 693         }\r
 694 }\r
 695 \r
 696 \r
 697 void emu_Loop(void)\r
 698 {\r
 699         static int gp2x_old_clock = 200;\r
 700         static int PsndRate_old = 0, PicoOpt_old = 0, EmuOpt_old = 0, pal_old = 0;\r
 701         char fpsbuff[24]; // fps count c string\r
 702         struct timeval tval; // timing\r
 703         int thissec = 0, frames_done = 0, frames_shown = 0, oldmodes = 0;\r
 704         int target_fps, target_frametime, lim_time, vsync_offset, i;\r
 705         char *notice = 0;\r
 706 \r
 707         printf("entered emu_Loop()\n");\r
 708 \r
 709         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 710                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 711                 set_FCLK(currentConfig.CPUclock);\r
 712                 gp2x_old_clock = currentConfig.CPUclock;\r
 713                 printf(" done\n");\r
 714         }\r
 715 \r
 716         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 717                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 718                 gp2x_old_gamma = currentConfig.gamma;\r
 719                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 720         }\r
 721 \r
 722         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 723                 if (currentConfig.EmuOpt&0x2000)\r
 724                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 725                 else unset_LCD_custom_rate();\r
 726         }\r
 727 \r
 728         EmuOpt_old = currentConfig.EmuOpt;\r
 729         fpsbuff[0] = 0;\r
 730 \r
 731         // make sure we are in correct mode\r
 732         vidResetMode();\r
 733         scaling_update();\r
 734         Pico.m.dirtyPal = 1;\r
 735         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 736         find_combos();\r
 737 \r
 738         // pal/ntsc might have changed, reset related stuff\r
 739         target_fps = Pico.m.pal ? 50 : 60;\r
 740         target_frametime = 1000000/target_fps;\r
 741         reset_timing = 1;\r
 742 \r
 743         // prepare sound stuff\r
 744         if (currentConfig.EmuOpt & 4)\r
 745         {\r
 746                 int snd_excess_add;\r
 747                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 748                                 ((PicoOpt&0x200) && crashed_940)) {\r
 749                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 750                 }\r
 751                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 752                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 753                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 754                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
 755                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
 756                 PicoWriteSound = updateSound;\r
 757                 update_volume(0, 0);\r
 758                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 759                 PsndOut = sndBuffer;\r
 760                 PsndRate_old = PsndRate;\r
 761                 PicoOpt_old  = PicoOpt;\r
 762                 pal_old = Pico.m.pal;\r
 763         } else {\r
 764                 PsndOut = NULL;\r
 765         }\r
 766 \r
 767         // prepare CD buffer\r
 768         if (PicoMCD & 1) PicoCDBufferInit();\r
 769 \r
 770         // calc vsync offset to sync timing code with vsync\r
 771         if (currentConfig.EmuOpt&0x2000) {\r
 772                 gettimeofday(&tval, 0);\r
 773                 gp2x_video_wait_vsync();\r
 774                 gettimeofday(&tval, 0);\r
 775                 vsync_offset = tval.tv_usec;\r
 776                 while (vsync_offset >= target_frametime)\r
 777                         vsync_offset -= target_frametime;\r
 778                 if (!vsync_offset) vsync_offset++;\r
 779                 printf("vsync_offset: %i\n", vsync_offset);\r
 780         } else\r
 781                 vsync_offset = 0;\r
 782 \r
 783         // loop?\r
 784         while (engineState == PGS_Running)\r
 785         {\r
 786                 int modes;\r
 787 \r
 788                 gettimeofday(&tval, 0);\r
 789                 if (reset_timing) {\r
 790                         reset_timing = 0;\r
 791                         thissec = tval.tv_sec;\r
 792                         frames_shown = frames_done = tval.tv_usec/target_frametime;\r
 793                 }\r
 794 \r
 795                 // show notice message?\r
 796                 if (noticeMsgTime.tv_sec)\r
 797                 {\r
 798                         static int noticeMsgSum;\r
 799                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 800                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 801                                 clearArea(0);\r
 802                                 notice = 0;\r
 803                         } else {\r
 804                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 805                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 806                                 notice = noticeMsg;\r
 807                         }\r
 808                 }\r
 809 \r
 810                 // check for mode changes\r
 811                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 812                 if (modes != oldmodes)\r
 813                 {\r
 814                         int scalex = 320;\r
 815                         osd_fps_x = OSD_FPS_X;\r
 816                         if (modes & 4) {\r
 817                                 vidCpyM2 = vidCpyM2_40col;\r
 818                         } else {\r
 819                                 if (PicoOpt & 0x100) {\r
 820                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 821                                         scalex = 256;\r
 822                                         osd_fps_x = OSD_FPS_X - 64;\r
 823                                 } else {\r
 824                                         vidCpyM2 = vidCpyM2_32col;\r
 825                                 }\r
 826                         }\r
 827                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 828                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 829                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 830                         oldmodes = modes;\r
 831                         clearArea(1);\r
 832                 }\r
 833 \r
 834                 // second changed?\r
 835                 if (thissec != tval.tv_sec)\r
 836                 {\r
 837 #ifdef BENCHMARK\r
 838                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 839                         if (++bench == 10) {\r
 840                                 bench = 0;\r
 841                                 bench_fps_s = bench_fps;\r
 842                                 bf[bfp++ & 3] = bench_fps;\r
 843                                 bench_fps = 0;\r
 844                         }\r
 845                         bench_fps += frames_shown;\r
 846                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 847 #else\r
 848                         if (currentConfig.EmuOpt & 2)\r
 849                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 850                         if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 851 #endif\r
 852                         thissec = tval.tv_sec;\r
 853 \r
 854                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 855                                 frames_done = frames_shown = 0;\r
 856                         } else {\r
 857                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 858                                 // when second changes, but we don't want buffer to starve.\r
 859                                 if(PsndOut && frames_done < target_fps && frames_done > target_fps-5) {\r
 860                                         updateKeys();\r
 861                                         SkipFrame(1); frames_done++;\r
 862                                 }\r
 863 \r
 864                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;\r
 865                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;\r
 866                                 if (frames_shown > frames_done) frames_shown = frames_done;\r
 867                         }\r
 868                 }\r
 869 #ifdef PFRAMES\r
 870                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 871 #endif\r
 872 \r
 873                 lim_time = (frames_done+1) * target_frametime + vsync_offset;\r
 874                 if(currentConfig.Frameskip >= 0) { // frameskip enabled\r
 875                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 876                                 updateKeys();\r
 877                                 SkipFrame(1); frames_done++;\r
 878                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 879                                         gettimeofday(&tval, 0);\r
 880                                         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 881                                         if(tval.tv_usec < lim_time) { // we are too fast\r
 882                                                 simpleWait(thissec, lim_time);\r
 883                                         }\r
 884                                 }\r
 885                                 lim_time += target_frametime;\r
 886                         }\r
 887                 } else if(tval.tv_usec > lim_time) { // auto frameskip\r
 888                         // no time left for this frame - skip\r
 889                         if (tval.tv_usec - lim_time >= 300000) {\r
 890                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 891                                  * try to recover by resetting timing... */\r
 892                                 reset_timing = 1;\r
 893                                 continue;\r
 894                         }\r
 895                         updateKeys();\r
 896                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); frames_done++;\r
 897                         continue;\r
 898                 }\r
 899 \r
 900                 updateKeys();\r
 901                 PicoFrame();\r
 902 \r
 903 #if 0\r
 904 if (Pico.m.frame_count == 31563) {\r
 905         FILE *f;\r
 906         f = fopen("ram_p.bin", "wb");\r
 907         if (!f) { printf("!f\n"); exit(1); }\r
 908         fwrite(Pico.ram, 1, 0x10000, f);\r
 909         fclose(f);\r
 910         exit(0);\r
 911 }\r
 912 #endif\r
 913 #if 0\r
 914                 // debug\r
 915                 {\r
 916                         #define BYTE unsigned char\r
 917                         #define WORD unsigned short\r
 918                         struct\r
 919                         {\r
 920                                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 921                                 BYTE ColorMapType;    /* 01h  Color map type */\r
 922                                 BYTE ImageType;       /* 02h  Image type code */\r
 923                                 WORD CMapStart;       /* 03h  Color map origin */\r
 924                                 WORD CMapLength;      /* 05h  Color map length */\r
 925                                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 926                                 WORD XOffset;         /* 08h  X origin of image */\r
 927                                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 928                                 WORD Width;           /* 0Ch  Width of image */\r
 929                                 WORD Height;          /* 0Eh  Height of image */\r
 930                                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 931                                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 932                         } __attribute__((packed)) TGAHEAD;\r
 933                         static unsigned short oldscr[320*240];\r
 934                         FILE *f; char name[128]; int i;\r
 935 \r
 936                         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 937                         TGAHEAD.ImageType = 2;\r
 938                         TGAHEAD.Width = 320;\r
 939                         TGAHEAD.Height = 240;\r
 940                         TGAHEAD.PixelDepth = 16;\r
 941                         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 942 \r
 943                         #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 944 \r
 945                         for (i = 0; i < 320*240; i++)\r
 946                                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
 947                         if (i < 320*240)\r
 948                         {\r
 949                                 for (i = 0; i < 320*240; i++)\r
 950                                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
 951                                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 952                                 f = fopen(name, "wb");\r
 953                                 if (!f) { printf("!f\n"); exit(1); }\r
 954                                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 955                                 fwrite(oldscr, 1, 320*240*2, f);\r
 956                                 fclose(f);\r
 957                         }\r
 958                 }\r
 959 #endif\r
 960 \r
 961                 // check time\r
 962                 gettimeofday(&tval, 0);\r
 963                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 964 \r
 965                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 966                         reset_timing = 1;\r
 967                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 968                 {\r
 969                         // sleep or vsync if we are still too fast\r
 970                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 971                         if (!reset_timing && tval.tv_usec < lim_time)\r
 972                         {\r
 973                                 // we are too fast\r
 974                                 if (vsync_offset) {\r
 975                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 976                                                 simpleWait(thissec, lim_time - target_frametime/4);\r
 977                                         gp2x_video_wait_vsync();\r
 978                                 } else {\r
 979                                         simpleWait(thissec, lim_time);\r
 980                                 }\r
 981                         }\r
 982                 }\r
 983 \r
 984                 blit(fpsbuff, notice);\r
 985 \r
 986                 frames_done++; frames_shown++;\r
 987         }\r
 988 \r
 989         change_fast_forward(0);\r
 990 \r
 991         if (PicoMCD & 1) PicoCDBufferFree();\r
 992 \r
 993         // save SRAM\r
 994         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 995                 emu_state_cb("Writing SRAM/BRAM..");\r
 996                 emu_SaveLoadGame(0, 1);\r
 997                 SRam.changed = 0;\r
 998         }\r
 999 \r
1000         // if in 8bit mode, generate 16bit image for menu background\r
1001         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
1002                 emu_forcedFrame();\r
1003 }\r
1004 \r
1005 \r
1006 void emu_ResetGame(void)\r
1007 {\r
1008         PicoReset(0);\r
1009         reset_timing = 1;\r
1010 }\r
1011 \r
1012 \r