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 "../common/config.h"\r
  25 #include "cpuctrl.h"\r
  26 \r
  27 #include <Pico/PicoInt.h>\r
  28 #include <Pico/Patch.h>\r
  29 #include <Pico/sound/mix.h>\r
  30 #include <zlib/zlib.h>\r
  31 \r
  32 //#define PFRAMES\r
  33 \r
  34 #ifdef BENCHMARK\r
  35 #define OSD_FPS_X 220\r
  36 #else\r
  37 #define OSD_FPS_X 260\r
  38 #endif\r
  39 \r
  40 \r
  41 int engineState;\r
  42 int select_exits = 0;\r
  43 \r
  44 char romFileName[PATH_MAX];\r
  45 \r
  46 extern int crashed_940;\r
  47 \r
  48 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
  49 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  50 static int osd_fps_x;\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 #define PICO_PEN_ADJUST_X 4\r
  57 #define PICO_PEN_ADJUST_Y 2\r
  58 static int pico_pen_x = 320/2, pico_pen_y = 240/2;\r
  59 \r
  60 static void emu_msg_cb(const char *msg);\r
  61 static void emu_msg_tray_open(void);\r
  62 \r
  63 \r
  64 void emu_noticeMsgUpdated(void)\r
  65 {\r
  66         gettimeofday(&noticeMsgTime, 0);\r
  67 }\r
  68 \r
  69 void emu_getMainDir(char *dst, int len)\r
  70 {\r
  71         extern char **g_argv;\r
  72         int j;\r
  73 \r
  74         strncpy(dst, g_argv[0], len);\r
  75         len -= 32; // reserve\r
  76         if (len < 0) len = 0;\r
  77         dst[len] = 0;\r
  78         for (j = strlen(dst); j > 0; j--)\r
  79                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  80 }\r
  81 \r
  82 void emu_Init(void)\r
  83 {\r
  84         // make temp buffer for alt renderer\r
  85         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  86         if (!PicoDraw2FB)\r
  87         {\r
  88                 printf("PicoDraw2FB == 0\n");\r
  89         }\r
  90 \r
  91         // make dirs for saves, cfgs, etc.\r
  92         mkdir("mds", 0777);\r
  93         mkdir("srm", 0777);\r
  94         mkdir("brm", 0777);\r
  95         mkdir("cfg", 0777);\r
  96 \r
  97         PicoInit();\r
  98         PicoMessage = emu_msg_cb;\r
  99         PicoMCDopenTray = emu_msg_tray_open;\r
 100         PicoMCDcloseTray = menu_loop_tray;\r
 101 }\r
 102 \r
 103 \r
 104 static void scaling_update(void)\r
 105 {\r
 106         PicoOpt &= ~0x4100;\r
 107         switch (currentConfig.scaling) {\r
 108                 default: break; // off\r
 109                 case 1:  // hw hor\r
 110                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 111                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 112         }\r
 113 }\r
 114 \r
 115 \r
 116 void emu_Deinit(void)\r
 117 {\r
 118         // save SRAM\r
 119         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 120                 emu_SaveLoadGame(0, 1);\r
 121                 SRam.changed = 0;\r
 122         }\r
 123 \r
 124         if (!(currentConfig.EmuOpt & 0x20)) {\r
 125                 config_writelrom(PicoConfigFile);\r
 126 #ifndef NO_SYNC\r
 127                 sync();\r
 128 #endif\r
 129         }\r
 130 \r
 131         free(PicoDraw2FB);\r
 132 \r
 133         PicoExit();\r
 134 \r
 135         // restore gamma\r
 136         if (gp2x_old_gamma != 100)\r
 137                 set_gamma(100, 0);\r
 138 }\r
 139 \r
 140 void emu_prepareDefaultConfig(void)\r
 141 {\r
 142         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
 143         defaultConfig.EmuOpt    = 0x9d | 0x00700; // | <- ram_tmng, confirm_save, cd_leds\r
 144         defaultConfig.s_PicoOpt = 0x0f | POPT_EXT_FM|POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;\r
 145         defaultConfig.s_PsndRate = 44100;\r
 146         defaultConfig.s_PicoRegion = 0; // auto\r
 147         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 148         defaultConfig.s_PicoCDBuffers = 0;\r
 149         defaultConfig.Frameskip = -1; // auto\r
 150         defaultConfig.CPUclock = 200;\r
 151         defaultConfig.volume = 50;\r
 152         defaultConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 153         defaultConfig.KeyBinds[ 4] = 1<<1;\r
 154         defaultConfig.KeyBinds[ 2] = 1<<2;\r
 155         defaultConfig.KeyBinds[ 6] = 1<<3;\r
 156         defaultConfig.KeyBinds[14] = 1<<4;\r
 157         defaultConfig.KeyBinds[13] = 1<<5;\r
 158         defaultConfig.KeyBinds[12] = 1<<6;\r
 159         defaultConfig.KeyBinds[ 8] = 1<<7;\r
 160         defaultConfig.KeyBinds[15] = 1<<26; // switch rend\r
 161         defaultConfig.KeyBinds[10] = 1<<27; // save state\r
 162         defaultConfig.KeyBinds[11] = 1<<28; // load state\r
 163         defaultConfig.KeyBinds[23] = 1<<29; // vol up\r
 164         defaultConfig.KeyBinds[22] = 1<<30; // vol down\r
 165         defaultConfig.gamma = 100;\r
 166         defaultConfig.scaling = 0;\r
 167         defaultConfig.turbo_rate = 15;\r
 168 }\r
 169 \r
 170 void emu_setDefaultConfig(void)\r
 171 {\r
 172         memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));\r
 173         PicoOpt = currentConfig.s_PicoOpt;\r
 174         PsndRate = currentConfig.s_PsndRate;\r
 175         PicoRegionOverride = currentConfig.s_PicoRegion;\r
 176         PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;\r
 177         PicoCDBuffers = currentConfig.s_PicoCDBuffers;\r
 178 }\r
 179 \r
 180 void osd_text(int x, int y, const char *text)\r
 181 {\r
 182         int len = strlen(text)*8;\r
 183 \r
 184         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 185                 int *p, i, h;\r
 186                 x &= ~3; // align x\r
 187                 len = (len+3) >> 2;\r
 188                 for (h = 0; h < 8; h++) {\r
 189                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 190                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 191                 }\r
 192                 emu_textOut8(x, y, text);\r
 193         } else {\r
 194                 int *p, i, h;\r
 195                 x &= ~1; // align x\r
 196                 len = (len+1) >> 1;\r
 197                 for (h = 0; h < 8; h++) {\r
 198                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 199                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 200                 }\r
 201                 emu_textOut16(x, y, text);\r
 202         }\r
 203 }\r
 204 \r
 205 static void draw_cd_leds(void)\r
 206 {\r
 207 //      static\r
 208         int old_reg;\r
 209 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 210         old_reg = Pico_mcd->s68k_regs[0];\r
 211 \r
 212         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 213                 // 8-bit modes\r
 214                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 215                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 216                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 217                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 218                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 219                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 220                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 221                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 222         } else {\r
 223                 // 16-bit modes\r
 224                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 225                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 226                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 227                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 228                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 229                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 230         }\r
 231 }\r
 232 \r
 233 static void draw_pico_ptr(void)\r
 234 {\r
 235         unsigned short *p = (unsigned short *)gp2x_screen;\r
 236 \r
 237         // only if pen enabled and for 16bit modes\r
 238         if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;\r
 239 \r
 240         if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))\r
 241                 p += 32;\r
 242 \r
 243         p += 320 * (pico_pen_y + PICO_PEN_ADJUST_Y);\r
 244         p += pico_pen_x + PICO_PEN_ADJUST_X;\r
 245         p[0]   ^= 0xffff;\r
 246         p[319] ^= 0xffff;\r
 247         p[320] ^= 0xffff;\r
 248         p[321] ^= 0xffff;\r
 249         p[640] ^= 0xffff;\r
 250 }\r
 251 \r
 252 static int EmuScanBegin16(unsigned int num)\r
 253 {\r
 254         if (!(Pico.video.reg[1]&8)) num += 8;\r
 255         DrawLineDest = (unsigned short *) gp2x_screen + 320 * num;\r
 256 \r
 257         return 0;\r
 258 }\r
 259 \r
 260 static int EmuScanBegin8(unsigned int num)\r
 261 {\r
 262         if (!(Pico.video.reg[1]&8)) num += 8;\r
 263         DrawLineDest = (unsigned char *)  gp2x_screen + 320 * num;\r
 264 \r
 265         return 0;\r
 266 }\r
 267 \r
 268 int localPal[0x100];\r
 269 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 270 \r
 271 static void blit(const char *fps, const char *notice)\r
 272 {\r
 273         int emu_opt = currentConfig.EmuOpt;\r
 274 \r
 275         if (PicoOpt&0x10)\r
 276         {\r
 277                 // 8bit fast renderer\r
 278                 if (Pico.m.dirtyPal) {\r
 279                         Pico.m.dirtyPal = 0;\r
 280                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 281                         // feed new palette to our device\r
 282                         gp2x_video_setpalette(localPal, 0x40);\r
 283                 }\r
 284                 // a hack for VR\r
 285                 if (PicoRead16Hook == PicoSVPRead16)\r
 286                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 287                 // do actual copy\r
 288                 vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 289         }\r
 290         else if (!(emu_opt&0x80))\r
 291         {\r
 292                 // 8bit accurate renderer\r
 293                 if (Pico.m.dirtyPal)\r
 294                 {\r
 295                         int pallen = 0x40;\r
 296                         Pico.m.dirtyPal = 0;\r
 297                         if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
 298                         {\r
 299                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 300                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 301                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 302                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 303                                 pallen = 0x100;\r
 304                         }\r
 305                         else if (rendstatus & PDRAW_ACC_SPRITES) {\r
 306                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 307                                 memcpy32(localPal+0x40, localPal, 0x40);\r
 308                                 memcpy32(localPal+0x80, localPal, 0x40);\r
 309                                 memcpy32(localPal+0xc0, localPal, 0x40);\r
 310                                 pallen = 0x100;\r
 311                         }\r
 312                         else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
 313                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 314                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 315                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 316                                 pallen = 0xc0;\r
 317                         }\r
 318                         else {\r
 319                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 320                         }\r
 321                         if (pallen > 0xc0) {\r
 322                                 localPal[0xc0] = 0x0000c000;\r
 323                                 localPal[0xd0] = 0x00c00000;\r
 324                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 325                                 localPal[0xf0] = 0x00ffffff;\r
 326                         }\r
 327                         gp2x_video_setpalette(localPal, pallen);\r
 328                 }\r
 329         }\r
 330 \r
 331         if (notice || (emu_opt & 2)) {\r
 332                 int h = 232;\r
 333                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 334                 if (notice) osd_text(4, h, notice);\r
 335                 if (emu_opt & 2)\r
 336                         osd_text(osd_fps_x, h, fps);\r
 337         }\r
 338         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
 339                 draw_cd_leds();\r
 340         if (PicoAHW & PAHW_PICO)\r
 341                 draw_pico_ptr();\r
 342 \r
 343         //gp2x_video_wait_vsync();\r
 344         gp2x_video_flip();\r
 345 \r
 346         if (!(PicoOpt&0x10)) {\r
 347                 if (!(Pico.video.reg[1]&8)) {\r
 348                         if (currentConfig.EmuOpt&0x80) {\r
 349                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 350                         } else {\r
 351                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 352                         }\r
 353                 } else {\r
 354                         DrawLineDest = gp2x_screen;\r
 355                 }\r
 356         }\r
 357 }\r
 358 \r
 359 \r
 360 // clears whole screen or just the notice area (in all buffers)\r
 361 static void clearArea(int full)\r
 362 {\r
 363         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 364                 // 8-bit renderers\r
 365                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 366                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 367         } else {\r
 368                 // 16bit accurate renderer\r
 369                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 370                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 371         }\r
 372 }\r
 373 \r
 374 \r
 375 static void vidResetMode(void)\r
 376 {\r
 377         if (PicoOpt&0x10) {\r
 378                 gp2x_video_changemode(8);\r
 379         } else if (currentConfig.EmuOpt&0x80) {\r
 380                 gp2x_video_changemode(16);\r
 381                 PicoDrawSetColorFormat(1);\r
 382                 PicoScanBegin = EmuScanBegin16;\r
 383         } else {\r
 384                 gp2x_video_changemode(8);\r
 385                 PicoDrawSetColorFormat(2);\r
 386                 PicoScanBegin = EmuScanBegin8;\r
 387         }\r
 388         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 389                 // setup pal for 8-bit modes\r
 390                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 391                 localPal[0xd0] = 0x00c00000;\r
 392                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 393                 localPal[0xf0] = 0x00ffffff;\r
 394                 gp2x_video_setpalette(localPal, 0x100);\r
 395                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 396                 gp2x_video_flip();\r
 397         }\r
 398         Pico.m.dirtyPal = 1;\r
 399         // reset scaling\r
 400         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 401              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 402         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 403 }\r
 404 \r
 405 \r
 406 static void emu_msg_cb(const char *msg)\r
 407 {\r
 408         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 409                 // 8-bit renderers\r
 410                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 411                 osd_text(4, 232, msg);\r
 412                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 413         } else {\r
 414                 // 16bit accurate renderer\r
 415                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 416                 osd_text(4, 232, msg);\r
 417                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 418         }\r
 419         gettimeofday(&noticeMsgTime, 0);\r
 420         noticeMsgTime.tv_sec -= 2;\r
 421 \r
 422         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 423         reset_timing = 1;\r
 424 }\r
 425 \r
 426 static void emu_state_cb(const char *str)\r
 427 {\r
 428         clearArea(0);\r
 429         blit("", str);\r
 430 }\r
 431 \r
 432 static void emu_msg_tray_open(void)\r
 433 {\r
 434         strcpy(noticeMsg, "CD tray opened");\r
 435         gettimeofday(&noticeMsgTime, 0);\r
 436 }\r
 437 \r
 438 static void RunEventsPico(unsigned int events, unsigned int gp2x_keys)\r
 439 {\r
 440         int ret, px, py, lim_x;\r
 441         static int pdown_frames = 0;\r
 442 \r
 443         emu_RunEventsPico(events);\r
 444 \r
 445         if (pico_inp_mode == 0) return;\r
 446 \r
 447         // for F200\r
 448         ret = gp2x_touchpad_read(&px, &py);\r
 449         if (ret >= 0)\r
 450         {\r
 451                 if (ret > 35000)\r
 452                 {\r
 453                         if (pdown_frames++ > 5)\r
 454                                 PicoPad[0] |= 0x20;\r
 455 \r
 456                         pico_pen_x = px;\r
 457                         pico_pen_y = py;\r
 458                         if (!(Pico.video.reg[12]&1)) {\r
 459                                 pico_pen_x -= 32;\r
 460                                 if (pico_pen_x <   0) pico_pen_x = 0;\r
 461                                 if (pico_pen_x > 248) pico_pen_x = 248;\r
 462                         }\r
 463                         if (pico_pen_y > 224) pico_pen_y = 224;\r
 464                 }\r
 465                 else\r
 466                         pdown_frames = 0;\r
 467 \r
 468                 //if (ret == 0)\r
 469                 //      PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
 470         }\r
 471 \r
 472         PicoPad[0] &= ~0x0f; // release UDLR\r
 473         if (gp2x_keys & GP2X_UP)    pico_pen_y--;\r
 474         if (gp2x_keys & GP2X_DOWN)  pico_pen_y++;\r
 475         if (gp2x_keys & GP2X_LEFT)  pico_pen_x--;\r
 476         if (gp2x_keys & GP2X_RIGHT) pico_pen_x++;\r
 477 \r
 478         lim_x = (Pico.video.reg[12]&1) ? 319 : 255;\r
 479         if (pico_pen_y < 8) pico_pen_y = 8;\r
 480         if (pico_pen_y > 224-PICO_PEN_ADJUST_Y) pico_pen_y = 224-PICO_PEN_ADJUST_Y;\r
 481         if (pico_pen_x < 0) pico_pen_x = 0;\r
 482         if (pico_pen_x > lim_x-PICO_PEN_ADJUST_X) pico_pen_x = lim_x-PICO_PEN_ADJUST_X;\r
 483 \r
 484         PicoPicohw.pen_pos[0] = pico_pen_x;\r
 485         if (!(Pico.video.reg[12]&1)) PicoPicohw.pen_pos[0] += pico_pen_x/4;\r
 486         PicoPicohw.pen_pos[0] += 0x3c;\r
 487         PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);\r
 488 }\r
 489 \r
 490 static void update_volume(int has_changed, int is_up)\r
 491 {\r
 492         static int prev_frame = 0, wait_frames = 0;\r
 493         int vol = currentConfig.volume;\r
 494 \r
 495         if (has_changed)\r
 496         {\r
 497                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 498                         wait_frames++;\r
 499                 else {\r
 500                         if (is_up) {\r
 501                                 if (vol < 99) vol++;\r
 502                         } else {\r
 503                                 if (vol >  0) vol--;\r
 504                         }\r
 505                         wait_frames = 0;\r
 506                         gp2x_sound_volume(vol, vol);\r
 507                         currentConfig.volume = vol;\r
 508                 }\r
 509                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 510                 gettimeofday(&noticeMsgTime, 0);\r
 511                 prev_frame = Pico.m.frame_count;\r
 512         }\r
 513 \r
 514         // set the right mixer func\r
 515         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 516         if (vol >= 5)\r
 517                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 518         else {\r
 519                 mix_32_to_16l_level = 5 - vol;\r
 520                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 521         }\r
 522 }\r
 523 \r
 524 static void RunEvents(unsigned int which)\r
 525 {\r
 526         if (which & 0x1800) // save or load (but not both)\r
 527         {\r
 528                 int do_it = 1;\r
 529                 if ( emu_checkSaveFile(state_slot) &&\r
 530                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 531                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 532                         unsigned long keys;\r
 533                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 534                         while ( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 535                                 usleep(50*1024);\r
 536                         if (keys & GP2X_X) do_it = 0;\r
 537                         while ( gp2x_joystick_read(1) & (GP2X_X|GP2X_Y) ) // wait for release\r
 538                                 usleep(50*1024);\r
 539                         clearArea(0);\r
 540                 }\r
 541                 if (do_it) {\r
 542                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 543                         PicoStateProgressCB = emu_state_cb;\r
 544                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 545                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 546                         PicoStateProgressCB = NULL;\r
 547                 }\r
 548 \r
 549                 reset_timing = 1;\r
 550         }\r
 551         if (which & 0x0400) // switch renderer\r
 552         {\r
 553                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 554                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 555                 else   currentConfig.EmuOpt &= ~0x80;\r
 556 \r
 557                 vidResetMode();\r
 558 \r
 559                 if (PicoOpt&0x10) {\r
 560                         strcpy(noticeMsg, " 8bit fast renderer");\r
 561                 } else if (currentConfig.EmuOpt&0x80) {\r
 562                         strcpy(noticeMsg, "16bit accurate renderer");\r
 563                 } else {\r
 564                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 565                 }\r
 566 \r
 567                 gettimeofday(&noticeMsgTime, 0);\r
 568         }\r
 569         if (which & 0x0300)\r
 570         {\r
 571                 if(which&0x0200) {\r
 572                         state_slot -= 1;\r
 573                         if(state_slot < 0) state_slot = 9;\r
 574                 } else {\r
 575                         state_slot += 1;\r
 576                         if(state_slot > 9) state_slot = 0;\r
 577                 }\r
 578                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 579                 gettimeofday(&noticeMsgTime, 0);\r
 580         }\r
 581         if (which & 0x0080) {\r
 582                 engineState = PGS_Menu;\r
 583         }\r
 584 }\r
 585 \r
 586 static void updateKeys(void)\r
 587 {\r
 588         unsigned int keys, keys2, allActions[2] = { 0, 0 }, events;\r
 589         static unsigned int prevEvents = 0;\r
 590         int joy, i;\r
 591 \r
 592         keys = gp2x_joystick_read(0);\r
 593         if (keys & GP2X_SELECT) {\r
 594                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 595                 // wait until select is released, so menu would not resume game\r
 596                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 597         }\r
 598 \r
 599         keys &= CONFIGURABLE_KEYS;\r
 600         keys2 = keys;\r
 601 \r
 602         for (i = 0; i < 32; i++)\r
 603         {\r
 604                 if (keys2 & (1 << i))\r
 605                 {\r
 606                         int pl, acts = currentConfig.KeyBinds[i];\r
 607                         if (!acts) continue;\r
 608                         pl = (acts >> 16) & 1;\r
 609                         if (kb_combo_keys & (1 << i))\r
 610                         {\r
 611                                 int u = i+1, acts_c = acts & kb_combo_acts;\r
 612                                 // let's try to find the other one\r
 613                                 if (acts_c) {\r
 614                                         for (; u < 32; u++)\r
 615                                                 if ( (keys2 & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {\r
 616                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];\r
 617                                                         keys2 &= ~((1 << i) | (1 << u));\r
 618                                                         break;\r
 619                                                 }\r
 620                                 }\r
 621                                 // add non-combo actions if combo ones were not found\r
 622                                 if (!acts_c || u == 32)\r
 623                                         allActions[pl] |= acts & ~kb_combo_acts;\r
 624                         } else {\r
 625                                 allActions[pl] |= acts;\r
 626                         }\r
 627                 }\r
 628         }\r
 629 \r
 630         // add joy inputs\r
 631         if (num_of_joys > 0)\r
 632         {\r
 633                 gp2x_usbjoy_update();\r
 634                 for (joy = 0; joy < num_of_joys; joy++) {\r
 635                         int btns = gp2x_usbjoy_check2(joy);\r
 636                         for (i = 0; i < 32; i++) {\r
 637                                 if (btns & (1 << i)) {\r
 638                                         int acts = currentConfig.JoyBinds[joy][i];\r
 639                                         int pl = (acts >> 16) & 1;\r
 640                                         allActions[pl] |= acts;\r
 641                                 }\r
 642                         }\r
 643                 }\r
 644         }\r
 645 \r
 646         PicoPad[0] = allActions[0] & 0xfff;\r
 647         PicoPad[1] = allActions[1] & 0xfff;\r
 648 \r
 649         if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);\r
 650         if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);\r
 651 \r
 652         events = (allActions[0] | allActions[1]) >> 16;\r
 653 \r
 654         // volume is treated in special way and triggered every frame\r
 655         if (events & 0x6000)\r
 656                 update_volume(1, events & 0x2000);\r
 657 \r
 658         if ((events ^ prevEvents) & 0x40) {\r
 659                 emu_changeFastForward(events & 0x40);\r
 660                 update_volume(0, 0);\r
 661                 reset_timing = 1;\r
 662         }\r
 663 \r
 664         events &= ~prevEvents;\r
 665 \r
 666         if (PicoAHW == PAHW_PICO)\r
 667                 RunEventsPico(events, keys);\r
 668         if (events) RunEvents(events);\r
 669         if (movie_data) emu_updateMovie();\r
 670 \r
 671         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 672 }\r
 673 \r
 674 \r
 675 static void updateSound(int len)\r
 676 {\r
 677         if (PicoOpt&8) len<<=1;\r
 678 \r
 679         /* avoid writing audio when lagging behind to prevent audio lag */\r
 680         if (PicoSkipFrame != 2)\r
 681                 gp2x_sound_write(PsndOut, len<<1);\r
 682 }\r
 683 \r
 684 \r
 685 static void SkipFrame(int do_audio)\r
 686 {\r
 687         PicoSkipFrame=do_audio ? 1 : 2;\r
 688         PicoFrame();\r
 689         PicoSkipFrame=0;\r
 690 }\r
 691 \r
 692 \r
 693 void emu_forcedFrame(int opts)\r
 694 {\r
 695         int po_old = PicoOpt;\r
 696         int eo_old = currentConfig.EmuOpt;\r
 697 \r
 698         PicoOpt &= ~0x10;\r
 699         PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
 700         currentConfig.EmuOpt |= 0x80;\r
 701 \r
 702         //vidResetMode();\r
 703         PicoDrawSetColorFormat(1);\r
 704         PicoScanBegin = EmuScanBegin16;\r
 705         Pico.m.dirtyPal = 1;\r
 706         PicoFrameDrawOnly();\r
 707 \r
 708 /*\r
 709         if (!(Pico.video.reg[12]&1)) {\r
 710                 vidCpyM2 = vidCpyM2_32col;\r
 711                 clearArea(1);\r
 712         } else  vidCpyM2 = vidCpyM2_40col;\r
 713 \r
 714         vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 715         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 716         gp2x_video_setpalette(localPal, 0x40);\r
 717 */\r
 718         PicoOpt = po_old;\r
 719         currentConfig.EmuOpt = eo_old;\r
 720 }\r
 721 \r
 722 static void simpleWait(int thissec, int lim_time)\r
 723 {\r
 724         struct timeval tval;\r
 725 \r
 726         spend_cycles(1024);\r
 727         gettimeofday(&tval, 0);\r
 728         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 729 \r
 730         while (tval.tv_usec < lim_time)\r
 731         {\r
 732                 spend_cycles(1024);\r
 733                 gettimeofday(&tval, 0);\r
 734                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 735         }\r
 736 }\r
 737 \r
 738 \r
 739 #if 0\r
 740 static void tga_dump(void)\r
 741 {\r
 742 #define BYTE unsigned char\r
 743 #define WORD unsigned short\r
 744         struct\r
 745         {\r
 746                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 747                 BYTE ColorMapType;    /* 01h  Color map type */\r
 748                 BYTE ImageType;       /* 02h  Image type code */\r
 749                 WORD CMapStart;       /* 03h  Color map origin */\r
 750                 WORD CMapLength;      /* 05h  Color map length */\r
 751                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 752                 WORD XOffset;         /* 08h  X origin of image */\r
 753                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 754                 WORD Width;           /* 0Ch  Width of image */\r
 755                 WORD Height;          /* 0Eh  Height of image */\r
 756                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 757                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 758         } __attribute__((packed)) TGAHEAD;\r
 759         static unsigned short oldscr[320*240];\r
 760         FILE *f; char name[128]; int i;\r
 761 \r
 762         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 763         TGAHEAD.ImageType = 2;\r
 764         TGAHEAD.Width = 320;\r
 765         TGAHEAD.Height = 240;\r
 766         TGAHEAD.PixelDepth = 16;\r
 767         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 768 \r
 769 #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 770 \r
 771         for (i = 0; i < 320*240; i++)\r
 772                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
 773         if (i < 320*240)\r
 774         {\r
 775                 for (i = 0; i < 320*240; i++)\r
 776                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
 777                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 778                 f = fopen(name, "wb");\r
 779                 if (!f) { printf("!f\n"); exit(1); }\r
 780                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 781                 fwrite(oldscr, 1, 320*240*2, f);\r
 782                 fclose(f);\r
 783         }\r
 784 }\r
 785 #endif\r
 786 \r
 787 \r
 788 void emu_Loop(void)\r
 789 {\r
 790         static int gp2x_old_clock = 200;\r
 791         static int PsndRate_old = 0, PicoOpt_old = 0, EmuOpt_old = 0, pal_old = 0;\r
 792         char fpsbuff[24]; // fps count c string\r
 793         struct timeval tval; // timing\r
 794         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 795         int  frames_done,  frames_shown,  thissec; // actual frames\r
 796         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 797         char *notice = 0;\r
 798 \r
 799         printf("entered emu_Loop()\n");\r
 800 \r
 801         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 802                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 803                 set_FCLK(currentConfig.CPUclock);\r
 804                 gp2x_old_clock = currentConfig.CPUclock;\r
 805                 printf(" done\n");\r
 806         }\r
 807 \r
 808         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 809                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 810                 gp2x_old_gamma = currentConfig.gamma;\r
 811                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 812         }\r
 813 \r
 814         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 815                 if (currentConfig.EmuOpt&0x2000)\r
 816                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 817                 else unset_LCD_custom_rate();\r
 818         }\r
 819 \r
 820         EmuOpt_old = currentConfig.EmuOpt;\r
 821         fpsbuff[0] = 0;\r
 822 \r
 823         // make sure we are in correct mode\r
 824         vidResetMode();\r
 825         scaling_update();\r
 826         Pico.m.dirtyPal = 1;\r
 827         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 828         emu_findKeyBindCombos();\r
 829 \r
 830         // pal/ntsc might have changed, reset related stuff\r
 831         target_fps = Pico.m.pal ? 50 : 60;\r
 832         target_frametime = 1000000/target_fps;\r
 833         reset_timing = 1;\r
 834 \r
 835         // prepare sound stuff\r
 836         if (currentConfig.EmuOpt & 4)\r
 837         {\r
 838                 int snd_excess_add;\r
 839                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 840                                 ((PicoOpt&0x200) && crashed_940)) {\r
 841                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 842                 }\r
 843                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 844                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 845                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 846                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
 847                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
 848                 PicoWriteSound = updateSound;\r
 849                 update_volume(0, 0);\r
 850                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 851                 PsndOut = sndBuffer;\r
 852                 PsndRate_old = PsndRate;\r
 853                 PicoOpt_old  = PicoOpt;\r
 854                 pal_old = Pico.m.pal;\r
 855         } else {\r
 856                 PsndOut = NULL;\r
 857         }\r
 858 \r
 859         // prepare CD buffer\r
 860         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
 861 \r
 862         // calc vsync offset to sync timing code with vsync\r
 863         if (currentConfig.EmuOpt&0x2000) {\r
 864                 gettimeofday(&tval, 0);\r
 865                 gp2x_video_wait_vsync();\r
 866                 gettimeofday(&tval, 0);\r
 867                 vsync_offset = tval.tv_usec;\r
 868                 while (vsync_offset >= target_frametime)\r
 869                         vsync_offset -= target_frametime;\r
 870                 if (!vsync_offset) vsync_offset++;\r
 871                 printf("vsync_offset: %i\n", vsync_offset);\r
 872         } else\r
 873                 vsync_offset = 0;\r
 874 \r
 875         frames_done = frames_shown = thissec =\r
 876         pframes_done = pframes_shown = pthissec = 0;\r
 877 \r
 878         // loop\r
 879         while (engineState == PGS_Running)\r
 880         {\r
 881                 int modes;\r
 882 \r
 883                 gettimeofday(&tval, 0);\r
 884                 if (reset_timing) {\r
 885                         reset_timing = 0;\r
 886                         pthissec = tval.tv_sec;\r
 887                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 888                 }\r
 889 \r
 890                 // show notice message?\r
 891                 if (noticeMsgTime.tv_sec)\r
 892                 {\r
 893                         static int noticeMsgSum;\r
 894                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 895                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 896                                 clearArea(0);\r
 897                                 notice = 0;\r
 898                         } else {\r
 899                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 900                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 901                                 notice = noticeMsg;\r
 902                         }\r
 903                 }\r
 904 \r
 905                 // check for mode changes\r
 906                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 907                 if (modes != oldmodes)\r
 908                 {\r
 909                         int scalex = 320;\r
 910                         osd_fps_x = OSD_FPS_X;\r
 911                         if (modes & 4) {\r
 912                                 vidCpyM2 = vidCpyM2_40col;\r
 913                         } else {\r
 914                                 if (PicoOpt & 0x100) {\r
 915                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 916                                         scalex = 256;\r
 917                                         osd_fps_x = OSD_FPS_X - 64;\r
 918                                 } else {\r
 919                                         vidCpyM2 = vidCpyM2_32col;\r
 920                                 }\r
 921                         }\r
 922                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 923                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 924                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 925                         oldmodes = modes;\r
 926                         clearArea(1);\r
 927                 }\r
 928 \r
 929                 // second changed?\r
 930                 if (thissec != tval.tv_sec)\r
 931                 {\r
 932 #ifdef BENCHMARK\r
 933                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 934                         if (++bench == 10) {\r
 935                                 bench = 0;\r
 936                                 bench_fps_s = bench_fps;\r
 937                                 bf[bfp++ & 3] = bench_fps;\r
 938                                 bench_fps = 0;\r
 939                         }\r
 940                         bench_fps += frames_shown;\r
 941                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 942 #else\r
 943                         if (currentConfig.EmuOpt & 2) {\r
 944                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 945                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 946                         }\r
 947 #endif\r
 948                         frames_shown = frames_done = 0;\r
 949                         thissec = tval.tv_sec;\r
 950                 }\r
 951 #ifdef PFRAMES\r
 952                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 953 #endif\r
 954 \r
 955                 if (pthissec != tval.tv_sec)\r
 956                 {\r
 957                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 958                                 pframes_done = pframes_shown = 0;\r
 959                         } else {\r
 960                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 961                                 // when second changes, but we don't want buffer to starve.\r
 962                                 if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 963                                         updateKeys();\r
 964                                         SkipFrame(1); pframes_done++;\r
 965                                 }\r
 966 \r
 967                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 968                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 969                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 970                         }\r
 971                         pthissec = tval.tv_sec;\r
 972                 }\r
 973 \r
 974                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 975                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 976                 {\r
 977                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 978                                 updateKeys();\r
 979                                 SkipFrame(1); pframes_done++; frames_done++;\r
 980                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 981                                         gettimeofday(&tval, 0);\r
 982                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 983                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 984                                                 simpleWait(pthissec, lim_time);\r
 985                                         }\r
 986                                 }\r
 987                                 lim_time += target_frametime;\r
 988                         }\r
 989                 }\r
 990                 else if (tval.tv_usec > lim_time) // auto frameskip\r
 991                 {\r
 992                         // no time left for this frame - skip\r
 993                         if (tval.tv_usec - lim_time >= 300000) {\r
 994                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 995                                  * try to recover by resetting timing... */\r
 996                                 reset_timing = 1;\r
 997                                 continue;\r
 998                         }\r
 999                         updateKeys();\r
1000                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
1001                         continue;\r
1002                 }\r
1003 \r
1004                 updateKeys();\r
1005                 PicoFrame();\r
1006 \r
1007                 // check time\r
1008                 gettimeofday(&tval, 0);\r
1009                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1010 \r
1011                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
1012                         reset_timing = 1;\r
1013                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
1014                 {\r
1015                         // sleep or vsync if we are still too fast\r
1016                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
1017                         if (!reset_timing && tval.tv_usec < lim_time)\r
1018                         {\r
1019                                 // we are too fast\r
1020                                 if (vsync_offset) {\r
1021                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
1022                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
1023                                         gp2x_video_wait_vsync();\r
1024                                 } else {\r
1025                                         simpleWait(pthissec, lim_time);\r
1026                                 }\r
1027                         }\r
1028                 }\r
1029 \r
1030                 blit(fpsbuff, notice);\r
1031 \r
1032                 pframes_done++; pframes_shown++;\r
1033                  frames_done++;  frames_shown++;\r
1034         }\r
1035 \r
1036         emu_changeFastForward(0);\r
1037 \r
1038         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();\r
1039 \r
1040         // save SRAM\r
1041         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
1042                 emu_state_cb("Writing SRAM/BRAM..");\r
1043                 emu_SaveLoadGame(0, 1);\r
1044                 SRam.changed = 0;\r
1045         }\r
1046 \r
1047         // if in 8bit mode, generate 16bit image for menu background\r
1048         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
1049                 emu_forcedFrame(POPT_EN_SOFTSCALE);\r
1050 }\r
1051 \r
1052 \r
1053 void emu_ResetGame(void)\r
1054 {\r
1055         PicoReset();\r
1056         reset_timing = 1;\r
1057 }\r
1058 \r