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, pico_inp_mode = 0;\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    = 0x1d | 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 }\r
 168 \r
 169 void emu_setDefaultConfig(void)\r
 170 {\r
 171         memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));\r
 172         PicoOpt = currentConfig.s_PicoOpt;\r
 173         PsndRate = currentConfig.s_PsndRate;\r
 174         PicoRegionOverride = currentConfig.s_PicoRegion;\r
 175         PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;\r
 176         PicoCDBuffers = currentConfig.s_PicoCDBuffers;\r
 177 }\r
 178 \r
 179 void osd_text(int x, int y, const char *text)\r
 180 {\r
 181         int len = strlen(text)*8;\r
 182 \r
 183         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 184                 int *p, i, h;\r
 185                 x &= ~3; // align x\r
 186                 len = (len+3) >> 2;\r
 187                 for (h = 0; h < 8; h++) {\r
 188                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 189                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 190                 }\r
 191                 emu_textOut8(x, y, text);\r
 192         } else {\r
 193                 int *p, i, h;\r
 194                 x &= ~1; // align x\r
 195                 len = (len+1) >> 1;\r
 196                 for (h = 0; h < 8; h++) {\r
 197                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 198                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 199                 }\r
 200                 emu_textOut16(x, y, text);\r
 201         }\r
 202 }\r
 203 \r
 204 static void draw_cd_leds(void)\r
 205 {\r
 206 //      static\r
 207         int old_reg;\r
 208 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 209         old_reg = Pico_mcd->s68k_regs[0];\r
 210 \r
 211         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 212                 // 8-bit modes\r
 213                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 214                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 215                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 216                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 217                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 218                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 219                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 220                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 221         } else {\r
 222                 // 16-bit modes\r
 223                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 224                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 225                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 226                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\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;\r
 229         }\r
 230 }\r
 231 \r
 232 static void draw_pico_ptr(void)\r
 233 {\r
 234         unsigned short *p = (unsigned short *)gp2x_screen;\r
 235 \r
 236         // only if pen enabled and for 16bit modes\r
 237         if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;\r
 238 \r
 239         if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))\r
 240                 p += 32;\r
 241 \r
 242         p += 320 * (pico_pen_y + PICO_PEN_ADJUST_Y);\r
 243         p += pico_pen_x + PICO_PEN_ADJUST_X;\r
 244         p[0]   ^= 0xffff;\r
 245         p[319] ^= 0xffff;\r
 246         p[320] ^= 0xffff;\r
 247         p[321] ^= 0xffff;\r
 248         p[640] ^= 0xffff;\r
 249 }\r
 250 \r
 251 static int EmuScanBegin16(unsigned int num)\r
 252 {\r
 253         if (!(Pico.video.reg[1]&8)) num += 8;\r
 254         DrawLineDest = (unsigned short *) gp2x_screen + 320 * num;\r
 255 \r
 256         return 0;\r
 257 }\r
 258 \r
 259 static int EmuScanBegin8(unsigned int num)\r
 260 {\r
 261         if (!(Pico.video.reg[1]&8)) num += 8;\r
 262         DrawLineDest = (unsigned char *)  gp2x_screen + 320 * num;\r
 263 \r
 264         return 0;\r
 265 }\r
 266 \r
 267 int localPal[0x100];\r
 268 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 269 \r
 270 static void blit(const char *fps, const char *notice)\r
 271 {\r
 272         int emu_opt = currentConfig.EmuOpt;\r
 273 \r
 274         if (PicoOpt&0x10)\r
 275         {\r
 276                 // 8bit fast renderer\r
 277                 if (Pico.m.dirtyPal) {\r
 278                         Pico.m.dirtyPal = 0;\r
 279                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 280                         // feed new palette to our device\r
 281                         gp2x_video_setpalette(localPal, 0x40);\r
 282                 }\r
 283                 // a hack for VR\r
 284                 if (PicoRead16Hook == PicoSVPRead16)\r
 285                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 286                 // do actual copy\r
 287                 vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 288         }\r
 289         else if (!(emu_opt&0x80))\r
 290         {\r
 291                 // 8bit accurate renderer\r
 292                 if (Pico.m.dirtyPal)\r
 293                 {\r
 294                         int pallen = 0x40;\r
 295                         Pico.m.dirtyPal = 0;\r
 296                         if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
 297                         {\r
 298                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 299                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 300                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 301                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 302                                 pallen = 0x100;\r
 303                         }\r
 304                         else if (rendstatus & PDRAW_ACC_SPRITES) {\r
 305                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 306                                 memcpy32(localPal+0x40, localPal, 0x40);\r
 307                                 memcpy32(localPal+0x80, localPal, 0x40);\r
 308                                 memcpy32(localPal+0xc0, localPal, 0x40);\r
 309                                 pallen = 0x100;\r
 310                         }\r
 311                         else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
 312                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 313                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 314                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 315                                 pallen = 0xc0;\r
 316                         }\r
 317                         else {\r
 318                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 319                         }\r
 320                         if (pallen > 0xc0) {\r
 321                                 localPal[0xc0] = 0x0000c000;\r
 322                                 localPal[0xd0] = 0x00c00000;\r
 323                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 324                                 localPal[0xf0] = 0x00ffffff;\r
 325                         }\r
 326                         gp2x_video_setpalette(localPal, pallen);\r
 327                 }\r
 328         }\r
 329 \r
 330         if (notice || (emu_opt & 2)) {\r
 331                 int h = 232;\r
 332                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 333                 if (notice) osd_text(4, h, notice);\r
 334                 if (emu_opt & 2)\r
 335                         osd_text(osd_fps_x, h, fps);\r
 336         }\r
 337         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
 338                 draw_cd_leds();\r
 339         if (PicoAHW & PAHW_PICO)\r
 340                 draw_pico_ptr();\r
 341 \r
 342         //gp2x_video_wait_vsync();\r
 343         gp2x_video_flip();\r
 344 \r
 345         if (!(PicoOpt&0x10)) {\r
 346                 if (!(Pico.video.reg[1]&8)) {\r
 347                         if (currentConfig.EmuOpt&0x80) {\r
 348                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 349                         } else {\r
 350                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 351                         }\r
 352                 } else {\r
 353                         DrawLineDest = gp2x_screen;\r
 354                 }\r
 355         }\r
 356 }\r
 357 \r
 358 \r
 359 // clears whole screen or just the notice area (in all buffers)\r
 360 static void clearArea(int full)\r
 361 {\r
 362         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 363                 // 8-bit renderers\r
 364                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 365                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 366         } else {\r
 367                 // 16bit accurate renderer\r
 368                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 369                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 370         }\r
 371 }\r
 372 \r
 373 \r
 374 static void vidResetMode(void)\r
 375 {\r
 376         if (PicoOpt&0x10) {\r
 377                 gp2x_video_changemode(8);\r
 378         } else if (currentConfig.EmuOpt&0x80) {\r
 379                 gp2x_video_changemode(16);\r
 380                 PicoDrawSetColorFormat(1);\r
 381                 PicoScanBegin = EmuScanBegin16;\r
 382         } else {\r
 383                 gp2x_video_changemode(8);\r
 384                 PicoDrawSetColorFormat(2);\r
 385                 PicoScanBegin = EmuScanBegin8;\r
 386         }\r
 387         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 388                 // setup pal for 8-bit modes\r
 389                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 390                 localPal[0xd0] = 0x00c00000;\r
 391                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 392                 localPal[0xf0] = 0x00ffffff;\r
 393                 gp2x_video_setpalette(localPal, 0x100);\r
 394                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 395                 gp2x_video_flip();\r
 396         }\r
 397         Pico.m.dirtyPal = 1;\r
 398         // reset scaling\r
 399         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 400              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 401         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 402 }\r
 403 \r
 404 \r
 405 static void emu_msg_cb(const char *msg)\r
 406 {\r
 407         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 408                 // 8-bit renderers\r
 409                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 410                 osd_text(4, 232, msg);\r
 411                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 412         } else {\r
 413                 // 16bit accurate renderer\r
 414                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 415                 osd_text(4, 232, msg);\r
 416                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 417         }\r
 418         gettimeofday(&noticeMsgTime, 0);\r
 419         noticeMsgTime.tv_sec -= 2;\r
 420 \r
 421         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 422         reset_timing = 1;\r
 423 }\r
 424 \r
 425 static void emu_state_cb(const char *str)\r
 426 {\r
 427         clearArea(0);\r
 428         blit("", str);\r
 429 }\r
 430 \r
 431 static void emu_msg_tray_open(void)\r
 432 {\r
 433         strcpy(noticeMsg, "CD tray opened");\r
 434         gettimeofday(&noticeMsgTime, 0);\r
 435 }\r
 436 \r
 437 static void RunEventsPico(unsigned int events, unsigned int gp2x_keys)\r
 438 {\r
 439         if (events & (1 << 3)) {\r
 440                 pico_inp_mode++;\r
 441                 if (pico_inp_mode > 2) pico_inp_mode = 0;\r
 442                 switch (pico_inp_mode) {\r
 443                         case 2: strcpy(noticeMsg, "Input: Pen on Pad      "); break;\r
 444                         case 1: strcpy(noticeMsg, "Input: Pen on Storyware"); break;\r
 445                         case 0: strcpy(noticeMsg, "Input: Joytick         ");\r
 446                                 PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
 447                                 break;\r
 448                 }\r
 449                 gettimeofday(&noticeMsgTime, 0);\r
 450         }\r
 451         if (events & (1 << 4)) {\r
 452                 PicoPicohw.page--;\r
 453                 if (PicoPicohw.page < 0) PicoPicohw.page = 0;\r
 454                 sprintf(noticeMsg, "Page %i                 ", PicoPicohw.page);\r
 455                 gettimeofday(&noticeMsgTime, 0);\r
 456         }\r
 457         if (events & (1 << 5)) {\r
 458                 PicoPicohw.page++;\r
 459                 if (PicoPicohw.page > 6) PicoPicohw.page = 6;\r
 460                 sprintf(noticeMsg, "Page %i                 ", PicoPicohw.page);\r
 461                 gettimeofday(&noticeMsgTime, 0);\r
 462         }\r
 463         if (pico_inp_mode != 0) {\r
 464                 PicoPad[0] &= ~0x0f; // release UDLR\r
 465                 if (gp2x_keys & GP2X_UP)   { pico_pen_y--; if (pico_pen_y < 0) pico_pen_y = 0; }\r
 466                 if (gp2x_keys & GP2X_DOWN) { pico_pen_y++; if (pico_pen_y > 239-PICO_PEN_ADJUST_Y) pico_pen_y = 239-PICO_PEN_ADJUST_Y; }\r
 467                 if (gp2x_keys & GP2X_LEFT) { pico_pen_x--; if (pico_pen_x < 0) pico_pen_x = 0; }\r
 468                 if (gp2x_keys & GP2X_RIGHT) {\r
 469                         int lim = (Pico.video.reg[12]&1) ? 319 : 255;\r
 470                         pico_pen_x++;\r
 471                         if (pico_pen_x > lim-PICO_PEN_ADJUST_X)\r
 472                                 pico_pen_x = lim-PICO_PEN_ADJUST_X;\r
 473                 }\r
 474                 PicoPicohw.pen_pos[0] = pico_pen_x;\r
 475                 if (!(Pico.video.reg[12]&1)) PicoPicohw.pen_pos[0] += pico_pen_x/4;\r
 476                 PicoPicohw.pen_pos[0] += 0x3c;\r
 477                 PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);\r
 478         }\r
 479 }\r
 480 \r
 481 static void update_volume(int has_changed, int is_up)\r
 482 {\r
 483         static int prev_frame = 0, wait_frames = 0;\r
 484         int vol = currentConfig.volume;\r
 485 \r
 486         if (has_changed)\r
 487         {\r
 488                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 489                         wait_frames++;\r
 490                 else {\r
 491                         if (is_up) {\r
 492                                 if (vol < 99) vol++;\r
 493                         } else {\r
 494                                 if (vol >  0) vol--;\r
 495                         }\r
 496                         wait_frames = 0;\r
 497                         gp2x_sound_volume(vol, vol);\r
 498                         currentConfig.volume = vol;\r
 499                 }\r
 500                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 501                 gettimeofday(&noticeMsgTime, 0);\r
 502                 prev_frame = Pico.m.frame_count;\r
 503         }\r
 504 \r
 505         // set the right mixer func\r
 506         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 507         if (vol >= 5)\r
 508                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 509         else {\r
 510                 mix_32_to_16l_level = 5 - vol;\r
 511                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 512         }\r
 513 }\r
 514 \r
 515 static void change_fast_forward(int set_on)\r
 516 {\r
 517         static void *set_PsndOut = NULL;\r
 518         static int set_Frameskip, set_EmuOpt, is_on = 0;\r
 519 \r
 520         if (set_on && !is_on) {\r
 521                 set_PsndOut = PsndOut;\r
 522                 set_Frameskip = currentConfig.Frameskip;\r
 523                 set_EmuOpt = currentConfig.EmuOpt;\r
 524                 PsndOut = NULL;\r
 525                 currentConfig.Frameskip = 8;\r
 526                 currentConfig.EmuOpt &= ~4;\r
 527                 is_on = 1;\r
 528         }\r
 529         else if (!set_on && is_on) {\r
 530                 PsndOut = set_PsndOut;\r
 531                 currentConfig.Frameskip = set_Frameskip;\r
 532                 currentConfig.EmuOpt = set_EmuOpt;\r
 533                 PsndRerate(1);\r
 534                 update_volume(0, 0);\r
 535                 reset_timing = 1;\r
 536                 is_on = 0;\r
 537         }\r
 538 }\r
 539 \r
 540 static void RunEvents(unsigned int which)\r
 541 {\r
 542         if (which & 0x1800) // save or load (but not both)\r
 543         {\r
 544                 int do_it = 1;\r
 545                 if ( emu_checkSaveFile(state_slot) &&\r
 546                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 547                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 548                         unsigned long keys;\r
 549                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 550                         while ( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 551                                 usleep(50*1024);\r
 552                         if (keys & GP2X_X) do_it = 0;\r
 553                         while ( gp2x_joystick_read(1) & (GP2X_X|GP2X_Y) ) // wait for release\r
 554                                 usleep(50*1024);\r
 555                         clearArea(0);\r
 556                 }\r
 557                 if (do_it) {\r
 558                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 559                         PicoStateProgressCB = emu_state_cb;\r
 560                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 561                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 562                         PicoStateProgressCB = NULL;\r
 563                 }\r
 564 \r
 565                 reset_timing = 1;\r
 566         }\r
 567         if (which & 0x0400) // switch renderer\r
 568         {\r
 569                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 570                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 571                 else   currentConfig.EmuOpt &= ~0x80;\r
 572 \r
 573                 vidResetMode();\r
 574 \r
 575                 if (PicoOpt&0x10) {\r
 576                         strcpy(noticeMsg, " 8bit fast renderer");\r
 577                 } else if (currentConfig.EmuOpt&0x80) {\r
 578                         strcpy(noticeMsg, "16bit accurate renderer");\r
 579                 } else {\r
 580                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 581                 }\r
 582 \r
 583                 gettimeofday(&noticeMsgTime, 0);\r
 584         }\r
 585         if (which & 0x0300)\r
 586         {\r
 587                 if(which&0x0200) {\r
 588                         state_slot -= 1;\r
 589                         if(state_slot < 0) state_slot = 9;\r
 590                 } else {\r
 591                         state_slot += 1;\r
 592                         if(state_slot > 9) state_slot = 0;\r
 593                 }\r
 594                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 595                 gettimeofday(&noticeMsgTime, 0);\r
 596         }\r
 597         if (which & 0x0080) {\r
 598                 engineState = PGS_Menu;\r
 599         }\r
 600 }\r
 601 \r
 602 static void updateKeys(void)\r
 603 {\r
 604         unsigned int keys, keys2, allActions[2] = { 0, 0 }, events;\r
 605         static unsigned int prevEvents = 0;\r
 606         int joy, i;\r
 607 \r
 608         keys = gp2x_joystick_read(0);\r
 609         if (keys & GP2X_SELECT) {\r
 610                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 611                 // wait until select is released, so menu would not resume game\r
 612                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 613         }\r
 614 \r
 615         keys &= CONFIGURABLE_KEYS;\r
 616         keys2 = keys;\r
 617 \r
 618         for (i = 0; i < 32; i++)\r
 619         {\r
 620                 if (keys2 & (1 << i))\r
 621                 {\r
 622                         int pl, acts = currentConfig.KeyBinds[i];\r
 623                         if (!acts) continue;\r
 624                         pl = (acts >> 16) & 1;\r
 625                         if (kb_combo_keys & (1 << i))\r
 626                         {\r
 627                                 int u = i+1, acts_c = acts & kb_combo_acts;\r
 628                                 // let's try to find the other one\r
 629                                 if (acts_c) {\r
 630                                         for (; u < 32; u++)\r
 631                                                 if ( (keys2 & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {\r
 632                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];\r
 633                                                         keys2 &= ~((1 << i) | (1 << u));\r
 634                                                         break;\r
 635                                                 }\r
 636                                 }\r
 637                                 // add non-combo actions if combo ones were not found\r
 638                                 if (!acts_c || u == 32)\r
 639                                         allActions[pl] |= acts & ~kb_combo_acts;\r
 640                         } else {\r
 641                                 allActions[pl] |= acts;\r
 642                         }\r
 643                 }\r
 644         }\r
 645 \r
 646         // add joy inputs\r
 647         if (num_of_joys > 0)\r
 648         {\r
 649                 gp2x_usbjoy_update();\r
 650                 for (joy = 0; joy < num_of_joys; joy++) {\r
 651                         int btns = gp2x_usbjoy_check2(joy);\r
 652                         for (i = 0; i < 32; i++) {\r
 653                                 if (btns & (1 << i)) {\r
 654                                         int acts = currentConfig.JoyBinds[joy][i];\r
 655                                         int pl = (acts >> 16) & 1;\r
 656                                         allActions[pl] |= acts;\r
 657                                 }\r
 658                         }\r
 659                 }\r
 660         }\r
 661 \r
 662         PicoPad[0] = (unsigned short) allActions[0];\r
 663         PicoPad[1] = (unsigned short) allActions[1];\r
 664 \r
 665         events = (allActions[0] | allActions[1]) >> 16;\r
 666 \r
 667         // volume is treated in special way and triggered every frame\r
 668         if (events & 0x6000)\r
 669                 update_volume(1, events & 0x2000);\r
 670 \r
 671         if ((events ^ prevEvents) & 0x40)\r
 672                 change_fast_forward(events & 0x40);\r
 673 \r
 674         events &= ~prevEvents;\r
 675 \r
 676         if (PicoAHW == PAHW_PICO)\r
 677                 RunEventsPico(events, keys);\r
 678 \r
 679         if (events) RunEvents(events);\r
 680         if (movie_data) emu_updateMovie();\r
 681 \r
 682         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 683 }\r
 684 \r
 685 \r
 686 static void updateSound(int len)\r
 687 {\r
 688         if (PicoOpt&8) len<<=1;\r
 689 \r
 690         /* avoid writing audio when lagging behind to prevent audio lag */\r
 691         if (PicoSkipFrame != 2)\r
 692                 gp2x_sound_write(PsndOut, len<<1);\r
 693 }\r
 694 \r
 695 \r
 696 static void SkipFrame(int do_audio)\r
 697 {\r
 698         PicoSkipFrame=do_audio ? 1 : 2;\r
 699         PicoFrame();\r
 700         PicoSkipFrame=0;\r
 701 }\r
 702 \r
 703 \r
 704 void emu_forcedFrame(int opts)\r
 705 {\r
 706         int po_old = PicoOpt;\r
 707         int eo_old = currentConfig.EmuOpt;\r
 708 \r
 709         PicoOpt &= ~0x10;\r
 710         PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
 711         currentConfig.EmuOpt |= 0x80;\r
 712 \r
 713         //vidResetMode();\r
 714         PicoDrawSetColorFormat(1);\r
 715         PicoScanBegin = EmuScanBegin16;\r
 716         Pico.m.dirtyPal = 1;\r
 717         PicoFrameDrawOnly();\r
 718 \r
 719 /*\r
 720         if (!(Pico.video.reg[12]&1)) {\r
 721                 vidCpyM2 = vidCpyM2_32col;\r
 722                 clearArea(1);\r
 723         } else  vidCpyM2 = vidCpyM2_40col;\r
 724 \r
 725         vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 726         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 727         gp2x_video_setpalette(localPal, 0x40);\r
 728 */\r
 729         PicoOpt = po_old;\r
 730         currentConfig.EmuOpt = eo_old;\r
 731 }\r
 732 \r
 733 static void simpleWait(int thissec, int lim_time)\r
 734 {\r
 735         struct timeval tval;\r
 736 \r
 737         spend_cycles(1024);\r
 738         gettimeofday(&tval, 0);\r
 739         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 740 \r
 741         while (tval.tv_usec < lim_time)\r
 742         {\r
 743                 spend_cycles(1024);\r
 744                 gettimeofday(&tval, 0);\r
 745                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 746         }\r
 747 }\r
 748 \r
 749 \r
 750 #if 0\r
 751 static void tga_dump(void)\r
 752 {\r
 753 #define BYTE unsigned char\r
 754 #define WORD unsigned short\r
 755         struct\r
 756         {\r
 757                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 758                 BYTE ColorMapType;    /* 01h  Color map type */\r
 759                 BYTE ImageType;       /* 02h  Image type code */\r
 760                 WORD CMapStart;       /* 03h  Color map origin */\r
 761                 WORD CMapLength;      /* 05h  Color map length */\r
 762                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 763                 WORD XOffset;         /* 08h  X origin of image */\r
 764                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 765                 WORD Width;           /* 0Ch  Width of image */\r
 766                 WORD Height;          /* 0Eh  Height of image */\r
 767                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 768                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 769         } __attribute__((packed)) TGAHEAD;\r
 770         static unsigned short oldscr[320*240];\r
 771         FILE *f; char name[128]; int i;\r
 772 \r
 773         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 774         TGAHEAD.ImageType = 2;\r
 775         TGAHEAD.Width = 320;\r
 776         TGAHEAD.Height = 240;\r
 777         TGAHEAD.PixelDepth = 16;\r
 778         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 779 \r
 780 #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 781 \r
 782         for (i = 0; i < 320*240; i++)\r
 783                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
 784         if (i < 320*240)\r
 785         {\r
 786                 for (i = 0; i < 320*240; i++)\r
 787                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
 788                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 789                 f = fopen(name, "wb");\r
 790                 if (!f) { printf("!f\n"); exit(1); }\r
 791                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 792                 fwrite(oldscr, 1, 320*240*2, f);\r
 793                 fclose(f);\r
 794         }\r
 795 }\r
 796 #endif\r
 797 \r
 798 \r
 799 void emu_Loop(void)\r
 800 {\r
 801         static int gp2x_old_clock = 200;\r
 802         static int PsndRate_old = 0, PicoOpt_old = 0, EmuOpt_old = 0, pal_old = 0;\r
 803         char fpsbuff[24]; // fps count c string\r
 804         struct timeval tval; // timing\r
 805         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 806         int  frames_done,  frames_shown,  thissec; // actual frames\r
 807         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 808         char *notice = 0;\r
 809 \r
 810         printf("entered emu_Loop()\n");\r
 811 \r
 812         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 813                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 814                 set_FCLK(currentConfig.CPUclock);\r
 815                 gp2x_old_clock = currentConfig.CPUclock;\r
 816                 printf(" done\n");\r
 817         }\r
 818 \r
 819         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 820                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 821                 gp2x_old_gamma = currentConfig.gamma;\r
 822                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 823         }\r
 824 \r
 825         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 826                 if (currentConfig.EmuOpt&0x2000)\r
 827                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 828                 else unset_LCD_custom_rate();\r
 829         }\r
 830 \r
 831         EmuOpt_old = currentConfig.EmuOpt;\r
 832         fpsbuff[0] = 0;\r
 833 \r
 834         // make sure we are in correct mode\r
 835         vidResetMode();\r
 836         scaling_update();\r
 837         Pico.m.dirtyPal = 1;\r
 838         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 839         emu_findKeyBindCombos();\r
 840 \r
 841         // pal/ntsc might have changed, reset related stuff\r
 842         target_fps = Pico.m.pal ? 50 : 60;\r
 843         target_frametime = 1000000/target_fps;\r
 844         reset_timing = 1;\r
 845 \r
 846         // prepare sound stuff\r
 847         if (currentConfig.EmuOpt & 4)\r
 848         {\r
 849                 int snd_excess_add;\r
 850                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 851                                 ((PicoOpt&0x200) && crashed_940)) {\r
 852                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 853                 }\r
 854                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 855                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 856                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 857                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
 858                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
 859                 PicoWriteSound = updateSound;\r
 860                 update_volume(0, 0);\r
 861                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 862                 PsndOut = sndBuffer;\r
 863                 PsndRate_old = PsndRate;\r
 864                 PicoOpt_old  = PicoOpt;\r
 865                 pal_old = Pico.m.pal;\r
 866         } else {\r
 867                 PsndOut = NULL;\r
 868         }\r
 869 \r
 870         // prepare CD buffer\r
 871         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
 872 \r
 873         // calc vsync offset to sync timing code with vsync\r
 874         if (currentConfig.EmuOpt&0x2000) {\r
 875                 gettimeofday(&tval, 0);\r
 876                 gp2x_video_wait_vsync();\r
 877                 gettimeofday(&tval, 0);\r
 878                 vsync_offset = tval.tv_usec;\r
 879                 while (vsync_offset >= target_frametime)\r
 880                         vsync_offset -= target_frametime;\r
 881                 if (!vsync_offset) vsync_offset++;\r
 882                 printf("vsync_offset: %i\n", vsync_offset);\r
 883         } else\r
 884                 vsync_offset = 0;\r
 885 \r
 886         frames_done = frames_shown = thissec =\r
 887         pframes_done = pframes_shown = pthissec = 0;\r
 888 \r
 889         // loop\r
 890         while (engineState == PGS_Running)\r
 891         {\r
 892                 int modes;\r
 893 \r
 894                 gettimeofday(&tval, 0);\r
 895                 if (reset_timing) {\r
 896                         reset_timing = 0;\r
 897                         pthissec = tval.tv_sec;\r
 898                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 899                 }\r
 900 \r
 901                 // show notice message?\r
 902                 if (noticeMsgTime.tv_sec)\r
 903                 {\r
 904                         static int noticeMsgSum;\r
 905                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 906                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 907                                 clearArea(0);\r
 908                                 notice = 0;\r
 909                         } else {\r
 910                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 911                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 912                                 notice = noticeMsg;\r
 913                         }\r
 914                 }\r
 915 \r
 916                 // check for mode changes\r
 917                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 918                 if (modes != oldmodes)\r
 919                 {\r
 920                         int scalex = 320;\r
 921                         osd_fps_x = OSD_FPS_X;\r
 922                         if (modes & 4) {\r
 923                                 vidCpyM2 = vidCpyM2_40col;\r
 924                         } else {\r
 925                                 if (PicoOpt & 0x100) {\r
 926                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 927                                         scalex = 256;\r
 928                                         osd_fps_x = OSD_FPS_X - 64;\r
 929                                 } else {\r
 930                                         vidCpyM2 = vidCpyM2_32col;\r
 931                                 }\r
 932                         }\r
 933                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 934                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 935                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 936                         oldmodes = modes;\r
 937                         clearArea(1);\r
 938                 }\r
 939 \r
 940                 // second changed?\r
 941                 if (thissec != tval.tv_sec)\r
 942                 {\r
 943 #ifdef BENCHMARK\r
 944                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 945                         if (++bench == 10) {\r
 946                                 bench = 0;\r
 947                                 bench_fps_s = bench_fps;\r
 948                                 bf[bfp++ & 3] = bench_fps;\r
 949                                 bench_fps = 0;\r
 950                         }\r
 951                         bench_fps += frames_shown;\r
 952                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 953 #else\r
 954                         if (currentConfig.EmuOpt & 2) {\r
 955                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 956                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 957                         }\r
 958 #endif\r
 959                         frames_shown = frames_done = 0;\r
 960                         thissec = tval.tv_sec;\r
 961                 }\r
 962 #ifdef PFRAMES\r
 963                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 964 #endif\r
 965 \r
 966                 if (pthissec != tval.tv_sec)\r
 967                 {\r
 968                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 969                                 pframes_done = pframes_shown = 0;\r
 970                         } else {\r
 971                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 972                                 // when second changes, but we don't want buffer to starve.\r
 973                                 if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 974                                         updateKeys();\r
 975                                         SkipFrame(1); pframes_done++;\r
 976                                 }\r
 977 \r
 978                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 979                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 980                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 981                         }\r
 982                         pthissec = tval.tv_sec;\r
 983                 }\r
 984 \r
 985                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 986                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 987                 {\r
 988                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 989                                 updateKeys();\r
 990                                 SkipFrame(1); pframes_done++; frames_done++;\r
 991                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 992                                         gettimeofday(&tval, 0);\r
 993                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 994                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 995                                                 simpleWait(pthissec, lim_time);\r
 996                                         }\r
 997                                 }\r
 998                                 lim_time += target_frametime;\r
 999                         }\r
1000                 }\r
1001                 else if (tval.tv_usec > lim_time) // auto frameskip\r
1002                 {\r
1003                         // no time left for this frame - skip\r
1004                         if (tval.tv_usec - lim_time >= 300000) {\r
1005                                 /* something caused a slowdown for us (disk access? cache flush?)\r
1006                                  * try to recover by resetting timing... */\r
1007                                 reset_timing = 1;\r
1008                                 continue;\r
1009                         }\r
1010                         updateKeys();\r
1011                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
1012                         continue;\r
1013                 }\r
1014 \r
1015                 updateKeys();\r
1016                 PicoFrame();\r
1017 \r
1018                 // check time\r
1019                 gettimeofday(&tval, 0);\r
1020                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1021 \r
1022                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
1023                         reset_timing = 1;\r
1024                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
1025                 {\r
1026                         // sleep or vsync if we are still too fast\r
1027                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
1028                         if (!reset_timing && tval.tv_usec < lim_time)\r
1029                         {\r
1030                                 // we are too fast\r
1031                                 if (vsync_offset) {\r
1032                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
1033                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
1034                                         gp2x_video_wait_vsync();\r
1035                                 } else {\r
1036                                         simpleWait(pthissec, lim_time);\r
1037                                 }\r
1038                         }\r
1039                 }\r
1040 \r
1041                 blit(fpsbuff, notice);\r
1042 \r
1043                 pframes_done++; pframes_shown++;\r
1044                  frames_done++;  frames_shown++;\r
1045         }\r
1046 \r
1047         change_fast_forward(0);\r
1048 \r
1049         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();\r
1050 \r
1051         // save SRAM\r
1052         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
1053                 emu_state_cb("Writing SRAM/BRAM..");\r
1054                 emu_SaveLoadGame(0, 1);\r
1055                 SRam.changed = 0;\r
1056         }\r
1057 \r
1058         // if in 8bit mode, generate 16bit image for menu background\r
1059         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
1060                 emu_forcedFrame(POPT_EN_SOFTSCALE);\r
1061 }\r
1062 \r
1063 \r
1064 void emu_ResetGame(void)\r
1065 {\r
1066         PicoReset();\r
1067         reset_timing = 1;\r
1068 }\r
1069 \r