platform/gp2x/emu.c

   1 // (c) Copyright 2006-2007 notaz, All rights reserved.\r
   2 // Free for non-commercial use.\r
   3 \r
   4 // For commercial use, separate licencing terms must be obtained.\r
   5 \r
   6 #include <stdio.h>\r
   7 #include <stdlib.h>\r
   8 #include <sys/time.h>\r
   9 #include <sys/stat.h>\r
  10 #include <sys/types.h>\r
  11 #include <linux/limits.h>\r
  12 #include <ctype.h>\r
  13 #include <unistd.h>\r
  14 \r
  15 #include <stdarg.h>\r
  16 \r
  17 #include "emu.h"\r
  18 #include "gp2x.h"\r
  19 #include "menu.h"\r
  20 #include "../linux/usbjoy.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 "../common/input.h"\r
  26 #include "../linux/sndout_oss.h"\r
  27 #include "cpuctrl.h"\r
  28 #include "version.h"\r
  29 \r
  30 #include <pico/pico_int.h>\r
  31 #include <pico/patch.h>\r
  32 #include <pico/sound/mix.h>\r
  33 #include <zlib/zlib.h>\r
  34 \r
  35 //#define PFRAMES\r
  36 \r
  37 #ifdef BENCHMARK\r
  38 #define OSD_FPS_X 220\r
  39 #else\r
  40 #define OSD_FPS_X 260\r
  41 #endif\r
  42 \r
  43 \r
  44 int select_exits = 0;\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 unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer\r
  53 int reset_timing = 0;\r
  54 \r
  55 #define PICO_PEN_ADJUST_X 4\r
  56 #define PICO_PEN_ADJUST_Y 2\r
  57 static int pico_pen_x = 320/2, pico_pen_y = 240/2;\r
  58 \r
  59 static void emu_msg_cb(const char *msg);\r
  60 static void emu_msg_tray_open(void);\r
  61 \r
  62 \r
  63 void emu_noticeMsgUpdated(void)\r
  64 {\r
  65         gettimeofday(&noticeMsgTime, 0);\r
  66 }\r
  67 \r
  68 int emu_getMainDir(char *dst, int len)\r
  69 {\r
  70         extern char **g_argv;\r
  71         int j;\r
  72 \r
  73         strncpy(dst, g_argv[0], len);\r
  74         len -= 32; // reserve\r
  75         if (len < 0) len = 0;\r
  76         dst[len] = 0;\r
  77         for (j = strlen(dst); j > 0; j--)\r
  78                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  79 \r
  80         return j + 1;\r
  81 }\r
  82 \r
  83 void emu_Init(void)\r
  84 {\r
  85         // make temp buffer for alt renderer\r
  86         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  87         if (!PicoDraw2FB)\r
  88         {\r
  89                 printf("PicoDraw2FB == 0\n");\r
  90         }\r
  91 \r
  92         // make dirs for saves, cfgs, etc.\r
  93         mkdir("mds", 0777);\r
  94         mkdir("srm", 0777);\r
  95         mkdir("brm", 0777);\r
  96         mkdir("cfg", 0777);\r
  97 \r
  98         PicoInit();\r
  99         PicoMessage = emu_msg_cb;\r
 100         PicoMCDopenTray = emu_msg_tray_open;\r
 101         PicoMCDcloseTray = menu_loop_tray;\r
 102 }\r
 103 \r
 104 \r
 105 static void scaling_update(void)\r
 106 {\r
 107         PicoOpt &= ~0x4100;\r
 108         switch (currentConfig.scaling) {\r
 109                 default: break; // off\r
 110                 case 1:  // hw hor\r
 111                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 112                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 113         }\r
 114 }\r
 115 \r
 116 \r
 117 void emu_Deinit(void)\r
 118 {\r
 119         // save SRAM\r
 120         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 121                 emu_SaveLoadGame(0, 1);\r
 122                 SRam.changed = 0;\r
 123         }\r
 124 \r
 125         if (!(currentConfig.EmuOpt & EOPT_NO_AUTOSVCFG))\r
 126                 emu_writelrom();\r
 127 \r
 128         free(PicoDraw2FB);\r
 129 \r
 130         PicoExit();\r
 131 \r
 132         // restore gamma\r
 133         if (gp2x_old_gamma != 100)\r
 134                 set_gamma(100, 0);\r
 135 }\r
 136 \r
 137 void emu_prepareDefaultConfig(void)\r
 138 {\r
 139         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
 140         defaultConfig.EmuOpt    = 0x9d | 0x00700; // | <- ram_tmng, confirm_save, cd_leds\r
 141         defaultConfig.s_PicoOpt = 0x0f | POPT_EXT_FM|POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;\r
 142         defaultConfig.s_PsndRate = 44100;\r
 143         defaultConfig.s_PicoRegion = 0; // auto\r
 144         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 145         defaultConfig.s_PicoCDBuffers = 0;\r
 146         defaultConfig.Frameskip = -1; // auto\r
 147         defaultConfig.CPUclock = 200;\r
 148         defaultConfig.volume = 50;\r
 149         defaultConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 150         defaultConfig.KeyBinds[ 4] = 1<<1;\r
 151         defaultConfig.KeyBinds[ 2] = 1<<2;\r
 152         defaultConfig.KeyBinds[ 6] = 1<<3;\r
 153         defaultConfig.KeyBinds[14] = 1<<4;\r
 154         defaultConfig.KeyBinds[13] = 1<<5;\r
 155         defaultConfig.KeyBinds[12] = 1<<6;\r
 156         defaultConfig.KeyBinds[ 8] = 1<<7;\r
 157         defaultConfig.KeyBinds[15] = 1<<26; // switch rend\r
 158         defaultConfig.KeyBinds[10] = 1<<27; // save state\r
 159         defaultConfig.KeyBinds[11] = 1<<28; // load state\r
 160         defaultConfig.KeyBinds[23] = 1<<29; // vol up\r
 161         defaultConfig.KeyBinds[22] = 1<<30; // vol down\r
 162         defaultConfig.gamma = 100;\r
 163         defaultConfig.scaling = 0;\r
 164         defaultConfig.turbo_rate = 15;\r
 165 }\r
 166 \r
 167 void osd_text(int x, int y, const char *text)\r
 168 {\r
 169         int len = strlen(text)*8;\r
 170 \r
 171         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 172                 int *p, i, h;\r
 173                 x &= ~3; // align x\r
 174                 len = (len+3) >> 2;\r
 175                 for (h = 0; h < 8; h++) {\r
 176                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 177                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 178                 }\r
 179                 emu_textOut8(x, y, text);\r
 180         } else {\r
 181                 int *p, i, h;\r
 182                 x &= ~1; // align x\r
 183                 len = (len+1) >> 1;\r
 184                 for (h = 0; h < 8; h++) {\r
 185                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 186                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 187                 }\r
 188                 emu_textOut16(x, y, text);\r
 189         }\r
 190 }\r
 191 \r
 192 static void draw_cd_leds(void)\r
 193 {\r
 194 //      static\r
 195         int old_reg;\r
 196 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 197         old_reg = Pico_mcd->s68k_regs[0];\r
 198 \r
 199         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 200                 // 8-bit modes\r
 201                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 202                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 203                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 204                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 205                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 206                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 207                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 208                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 209         } else {\r
 210                 // 16-bit modes\r
 211                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 212                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 213                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 214                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 215                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 216                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 217         }\r
 218 }\r
 219 \r
 220 static void draw_pico_ptr(void)\r
 221 {\r
 222         unsigned short *p = (unsigned short *)gp2x_screen;\r
 223 \r
 224         // only if pen enabled and for 16bit modes\r
 225         if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;\r
 226 \r
 227         if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))\r
 228                 p += 32;\r
 229 \r
 230         p += 320 * (pico_pen_y + PICO_PEN_ADJUST_Y);\r
 231         p += pico_pen_x + PICO_PEN_ADJUST_X;\r
 232         p[0]   ^= 0xffff;\r
 233         p[319] ^= 0xffff;\r
 234         p[320] ^= 0xffff;\r
 235         p[321] ^= 0xffff;\r
 236         p[640] ^= 0xffff;\r
 237 }\r
 238 \r
 239 static int EmuScanBegin16(unsigned int num)\r
 240 {\r
 241         if (!(Pico.video.reg[1]&8)) num += 8;\r
 242         DrawLineDest = (unsigned short *) gp2x_screen + 320 * num;\r
 243 \r
 244         return 0;\r
 245 }\r
 246 \r
 247 static int EmuScanBegin8(unsigned int num)\r
 248 {\r
 249         if (!(Pico.video.reg[1]&8)) num += 8;\r
 250         DrawLineDest = (unsigned char *)  gp2x_screen + 320 * num;\r
 251 \r
 252         return 0;\r
 253 }\r
 254 \r
 255 int localPal[0x100];\r
 256 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 257 \r
 258 static void blit(const char *fps, const char *notice)\r
 259 {\r
 260         int emu_opt = currentConfig.EmuOpt;\r
 261 \r
 262         if (PicoOpt&0x10)\r
 263         {\r
 264                 // 8bit fast renderer\r
 265                 if (Pico.m.dirtyPal) {\r
 266                         Pico.m.dirtyPal = 0;\r
 267                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 268                         // feed new palette to our device\r
 269                         gp2x_video_setpalette(localPal, 0x40);\r
 270                 }\r
 271                 // a hack for VR\r
 272                 if (PicoRead16Hook == PicoSVPRead16)\r
 273                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 274                 // do actual copy\r
 275                 vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 276         }\r
 277         else if (!(emu_opt&0x80))\r
 278         {\r
 279                 // 8bit accurate renderer\r
 280                 if (Pico.m.dirtyPal)\r
 281                 {\r
 282                         int pallen = 0xc0;\r
 283                         Pico.m.dirtyPal = 0;\r
 284                         if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
 285                         {\r
 286                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 287                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 288                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 289                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 290                                 pallen = 0x100;\r
 291                         }\r
 292                         else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
 293                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 294                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 295                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 296                         }\r
 297                         else {\r
 298                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 299                                 memcpy32(localPal+0x80, localPal, 0x40); // for spr prio mess\r
 300                         }\r
 301                         if (pallen > 0xc0) {\r
 302                                 localPal[0xc0] = 0x0000c000;\r
 303                                 localPal[0xd0] = 0x00c00000;\r
 304                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 305                                 localPal[0xf0] = 0x00ffffff;\r
 306                         }\r
 307                         gp2x_video_setpalette(localPal, pallen);\r
 308                 }\r
 309         }\r
 310 \r
 311         if (notice || (emu_opt & 2)) {\r
 312                 int h = 232;\r
 313                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 314                 if (notice) osd_text(4, h, notice);\r
 315                 if (emu_opt & 2)\r
 316                         osd_text(osd_fps_x, h, fps);\r
 317         }\r
 318         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
 319                 draw_cd_leds();\r
 320         if (PicoAHW & PAHW_PICO)\r
 321                 draw_pico_ptr();\r
 322 \r
 323         //gp2x_video_wait_vsync();\r
 324         gp2x_video_flip();\r
 325 \r
 326         if (!(PicoOpt&0x10)) {\r
 327                 if (!(Pico.video.reg[1]&8)) {\r
 328                         if (currentConfig.EmuOpt&0x80) {\r
 329                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 330                         } else {\r
 331                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 332                         }\r
 333                 } else {\r
 334                         DrawLineDest = gp2x_screen;\r
 335                 }\r
 336         }\r
 337 }\r
 338 \r
 339 \r
 340 // clears whole screen or just the notice area (in all buffers)\r
 341 static void clearArea(int full)\r
 342 {\r
 343         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 344                 // 8-bit renderers\r
 345                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 346                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 347         } else {\r
 348                 // 16bit accurate renderer\r
 349                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 350                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 351         }\r
 352 }\r
 353 \r
 354 \r
 355 static void vidResetMode(void)\r
 356 {\r
 357         if (PicoOpt&0x10) {\r
 358                 gp2x_video_changemode(8);\r
 359         } else if (currentConfig.EmuOpt&0x80) {\r
 360                 gp2x_video_changemode(16);\r
 361                 PicoDrawSetColorFormat(1);\r
 362                 PicoScanBegin = EmuScanBegin16;\r
 363         } else {\r
 364                 gp2x_video_changemode(8);\r
 365                 PicoDrawSetColorFormat(2);\r
 366                 PicoScanBegin = EmuScanBegin8;\r
 367         }\r
 368         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 369                 // setup pal for 8-bit modes\r
 370                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 371                 localPal[0xd0] = 0x00c00000;\r
 372                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 373                 localPal[0xf0] = 0x00ffffff;\r
 374                 gp2x_video_setpalette(localPal, 0x100);\r
 375                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 376                 gp2x_video_flip();\r
 377         }\r
 378         Pico.m.dirtyPal = 1;\r
 379         // reset scaling\r
 380         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 381              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 382         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 383 }\r
 384 \r
 385 \r
 386 static void emu_msg_cb(const char *msg)\r
 387 {\r
 388         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 389                 // 8-bit renderers\r
 390                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 391                 osd_text(4, 232, msg);\r
 392                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 393         } else {\r
 394                 // 16bit accurate renderer\r
 395                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 396                 osd_text(4, 232, msg);\r
 397                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 398         }\r
 399         gettimeofday(&noticeMsgTime, 0);\r
 400         noticeMsgTime.tv_sec -= 2;\r
 401 \r
 402         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 403         reset_timing = 1;\r
 404 }\r
 405 \r
 406 static void emu_state_cb(const char *str)\r
 407 {\r
 408         clearArea(0);\r
 409         blit("", str);\r
 410 }\r
 411 \r
 412 static void emu_msg_tray_open(void)\r
 413 {\r
 414         strcpy(noticeMsg, "CD tray opened");\r
 415         gettimeofday(&noticeMsgTime, 0);\r
 416 }\r
 417 \r
 418 static void RunEventsPico(unsigned int events, unsigned int gp2x_keys)\r
 419 {\r
 420         int ret, px, py, lim_x;\r
 421         static int pdown_frames = 0;\r
 422 \r
 423         emu_RunEventsPico(events);\r
 424 \r
 425         if (pico_inp_mode == 0) return;\r
 426 \r
 427         // for F200\r
 428         ret = gp2x_touchpad_read(&px, &py);\r
 429         if (ret >= 0)\r
 430         {\r
 431                 if (ret > 35000)\r
 432                 {\r
 433                         if (pdown_frames++ > 5)\r
 434                                 PicoPad[0] |= 0x20;\r
 435 \r
 436                         pico_pen_x = px;\r
 437                         pico_pen_y = py;\r
 438                         if (!(Pico.video.reg[12]&1)) {\r
 439                                 pico_pen_x -= 32;\r
 440                                 if (pico_pen_x <   0) pico_pen_x = 0;\r
 441                                 if (pico_pen_x > 248) pico_pen_x = 248;\r
 442                         }\r
 443                         if (pico_pen_y > 224) pico_pen_y = 224;\r
 444                 }\r
 445                 else\r
 446                         pdown_frames = 0;\r
 447 \r
 448                 //if (ret == 0)\r
 449                 //      PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
 450         }\r
 451 \r
 452         PicoPad[0] &= ~0x0f; // release UDLR\r
 453         if (gp2x_keys & GP2X_UP)    pico_pen_y--;\r
 454         if (gp2x_keys & GP2X_DOWN)  pico_pen_y++;\r
 455         if (gp2x_keys & GP2X_LEFT)  pico_pen_x--;\r
 456         if (gp2x_keys & GP2X_RIGHT) pico_pen_x++;\r
 457 \r
 458         lim_x = (Pico.video.reg[12]&1) ? 319 : 255;\r
 459         if (pico_pen_y < 8) pico_pen_y = 8;\r
 460         if (pico_pen_y > 224-PICO_PEN_ADJUST_Y) pico_pen_y = 224-PICO_PEN_ADJUST_Y;\r
 461         if (pico_pen_x < 0) pico_pen_x = 0;\r
 462         if (pico_pen_x > lim_x-PICO_PEN_ADJUST_X) pico_pen_x = lim_x-PICO_PEN_ADJUST_X;\r
 463 \r
 464         PicoPicohw.pen_pos[0] = pico_pen_x;\r
 465         if (!(Pico.video.reg[12]&1)) PicoPicohw.pen_pos[0] += pico_pen_x/4;\r
 466         PicoPicohw.pen_pos[0] += 0x3c;\r
 467         PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);\r
 468 }\r
 469 \r
 470 static void update_volume(int has_changed, int is_up)\r
 471 {\r
 472         static int prev_frame = 0, wait_frames = 0;\r
 473         int vol = currentConfig.volume;\r
 474 \r
 475         if (has_changed)\r
 476         {\r
 477                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 478                         wait_frames++;\r
 479                 else {\r
 480                         if (is_up) {\r
 481                                 if (vol < 99) vol++;\r
 482                         } else {\r
 483                                 if (vol >  0) vol--;\r
 484                         }\r
 485                         wait_frames = 0;\r
 486                         sndout_oss_setvol(vol, vol);\r
 487                         currentConfig.volume = vol;\r
 488                 }\r
 489                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 490                 gettimeofday(&noticeMsgTime, 0);\r
 491                 prev_frame = Pico.m.frame_count;\r
 492         }\r
 493 \r
 494         // set the right mixer func\r
 495         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 496         if (vol >= 5)\r
 497                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 498         else {\r
 499                 mix_32_to_16l_level = 5 - vol;\r
 500                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 501         }\r
 502 }\r
 503 \r
 504 static void RunEvents(unsigned int which)\r
 505 {\r
 506         if (which & 0x1800) // save or load (but not both)\r
 507         {\r
 508                 int do_it = 1;\r
 509                 if ( emu_checkSaveFile(state_slot) &&\r
 510                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 511                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 512                         unsigned long keys;\r
 513                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 514                         while ( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 515                                 usleep(50*1024);\r
 516                         if (keys & GP2X_X) do_it = 0;\r
 517                         while ( gp2x_joystick_read(1) & (GP2X_X|GP2X_Y) ) // wait for release\r
 518                                 usleep(50*1024);\r
 519                         clearArea(0);\r
 520                 }\r
 521                 if (do_it) {\r
 522                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 523                         PicoStateProgressCB = emu_state_cb;\r
 524                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 525                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 526                         PicoStateProgressCB = NULL;\r
 527                 }\r
 528 \r
 529                 reset_timing = 1;\r
 530         }\r
 531         if (which & 0x0400) // switch renderer\r
 532         {\r
 533                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 534                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 535                 else   currentConfig.EmuOpt &= ~0x80;\r
 536 \r
 537                 vidResetMode();\r
 538 \r
 539                 if (PicoOpt&0x10) {\r
 540                         strcpy(noticeMsg, " 8bit fast renderer");\r
 541                 } else if (currentConfig.EmuOpt&0x80) {\r
 542                         strcpy(noticeMsg, "16bit accurate renderer");\r
 543                 } else {\r
 544                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 545                 }\r
 546 \r
 547                 gettimeofday(&noticeMsgTime, 0);\r
 548         }\r
 549         if (which & 0x0300)\r
 550         {\r
 551                 if(which&0x0200) {\r
 552                         state_slot -= 1;\r
 553                         if(state_slot < 0) state_slot = 9;\r
 554                 } else {\r
 555                         state_slot += 1;\r
 556                         if(state_slot > 9) state_slot = 0;\r
 557                 }\r
 558                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 559                 gettimeofday(&noticeMsgTime, 0);\r
 560         }\r
 561         if (which & 0x0080) {\r
 562                 engineState = PGS_Menu;\r
 563         }\r
 564 }\r
 565 \r
 566 static void updateKeys(void)\r
 567 {\r
 568         unsigned int keys, keys2, allActions[2] = { 0, 0 }, events;\r
 569         static unsigned int prevEvents = 0;\r
 570         int joy, i;\r
 571 \r
 572         keys = gp2x_joystick_read(0);\r
 573         if (keys & GP2X_SELECT) {\r
 574                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 575                 // wait until select is released, so menu would not resume game\r
 576                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 577         }\r
 578 \r
 579         keys &= CONFIGURABLE_KEYS;\r
 580         keys2 = keys;\r
 581 \r
 582 #if 1\r
 583         /* FIXME: combos, player2 */\r
 584         allActions[0] = in_update();\r
 585 #else\r
 586         for (i = 0; i < 32; i++)\r
 587         {\r
 588                 if (keys2 & (1 << i))\r
 589                 {\r
 590                         int pl, acts = currentConfig.KeyBinds[i];\r
 591                         if (!acts) continue;\r
 592                         pl = (acts >> 16) & 1;\r
 593                         if (kb_combo_keys & (1 << i))\r
 594                         {\r
 595                                 int u = i+1, acts_c = acts & kb_combo_acts;\r
 596                                 // let's try to find the other one\r
 597                                 if (acts_c) {\r
 598                                         for (; u < 32; u++)\r
 599                                                 if ( (keys2 & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {\r
 600                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];\r
 601                                                         keys2 &= ~((1 << i) | (1 << u));\r
 602                                                         break;\r
 603                                                 }\r
 604                                 }\r
 605                                 // add non-combo actions if combo ones were not found\r
 606                                 if (!acts_c || u == 32)\r
 607                                         allActions[pl] |= acts & ~kb_combo_acts;\r
 608                         } else {\r
 609                                 allActions[pl] |= acts;\r
 610                         }\r
 611                 }\r
 612         }\r
 613 #endif\r
 614 \r
 615         // add joy inputs\r
 616         if (num_of_joys > 0)\r
 617         {\r
 618                 usbjoy_update();\r
 619                 for (joy = 0; joy < num_of_joys; joy++) {\r
 620                         int btns = usbjoy_check2(joy);\r
 621                         for (i = 0; i < 32; i++) {\r
 622                                 if (btns & (1 << i)) {\r
 623                                         int acts = currentConfig.JoyBinds[joy][i];\r
 624                                         int pl = (acts >> 16) & 1;\r
 625                                         allActions[pl] |= acts;\r
 626                                 }\r
 627                         }\r
 628                 }\r
 629         }\r
 630 \r
 631         PicoPad[0] = allActions[0] & 0xfff;\r
 632         PicoPad[1] = allActions[1] & 0xfff;\r
 633 \r
 634         if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);\r
 635         if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);\r
 636 \r
 637         events = (allActions[0] | allActions[1]) >> 16;\r
 638 \r
 639         // volume is treated in special way and triggered every frame\r
 640         if (events & 0x6000)\r
 641                 update_volume(1, events & 0x2000);\r
 642 \r
 643         if ((events ^ prevEvents) & 0x40) {\r
 644                 emu_changeFastForward(events & 0x40);\r
 645                 update_volume(0, 0);\r
 646                 reset_timing = 1;\r
 647         }\r
 648 \r
 649         events &= ~prevEvents;\r
 650 \r
 651         if (PicoAHW == PAHW_PICO)\r
 652                 RunEventsPico(events, keys);\r
 653         if (events) RunEvents(events);\r
 654         if (movie_data) emu_updateMovie();\r
 655 \r
 656         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 657 }\r
 658 \r
 659 \r
 660 static void updateSound(int len)\r
 661 {\r
 662         if (PicoOpt&8) len<<=1;\r
 663 \r
 664         /* avoid writing audio when lagging behind to prevent audio lag */\r
 665         if (PicoSkipFrame != 2)\r
 666                 sndout_oss_write(PsndOut, len<<1);\r
 667 }\r
 668 \r
 669 void emu_startSound(void)\r
 670 {\r
 671         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
 672         int target_fps = Pico.m.pal ? 50 : 60;\r
 673 \r
 674         PsndOut = NULL;\r
 675 \r
 676         // prepare sound stuff\r
 677         if (currentConfig.EmuOpt & 4)\r
 678         {\r
 679                 int snd_excess_add;\r
 680                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 681                                 ((PicoOpt&0x200) && crashed_940)) {\r
 682                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 683                 }\r
 684                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 685                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 686                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 687                 sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
 688                 sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
 689                 PicoWriteSound = updateSound;\r
 690                 update_volume(0, 0);\r
 691                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 692                 PsndOut = sndBuffer;\r
 693                 PsndRate_old = PsndRate;\r
 694                 PicoOpt_old  = PicoOpt;\r
 695                 pal_old = Pico.m.pal;\r
 696         }\r
 697 }\r
 698 \r
 699 void emu_endSound(void)\r
 700 {\r
 701 }\r
 702 \r
 703 /* wait until we can write more sound */\r
 704 void emu_waitSound(void)\r
 705 {\r
 706         // don't need to do anything, writes will block by themselves\r
 707 }\r
 708 \r
 709 \r
 710 static void SkipFrame(int do_audio)\r
 711 {\r
 712         PicoSkipFrame=do_audio ? 1 : 2;\r
 713         PicoFrame();\r
 714         PicoSkipFrame=0;\r
 715 }\r
 716 \r
 717 \r
 718 void emu_forcedFrame(int opts)\r
 719 {\r
 720         int po_old = PicoOpt;\r
 721         int eo_old = currentConfig.EmuOpt;\r
 722 \r
 723         PicoOpt &= ~0x10;\r
 724         PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
 725         currentConfig.EmuOpt |= 0x80;\r
 726 \r
 727         //vidResetMode();\r
 728         PicoDrawSetColorFormat(1);\r
 729         PicoScanBegin = EmuScanBegin16;\r
 730         Pico.m.dirtyPal = 1;\r
 731         PicoFrameDrawOnly();\r
 732 \r
 733 /*\r
 734         if (!(Pico.video.reg[12]&1)) {\r
 735                 vidCpyM2 = vidCpyM2_32col;\r
 736                 clearArea(1);\r
 737         } else  vidCpyM2 = vidCpyM2_40col;\r
 738 \r
 739         vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 740         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 741         gp2x_video_setpalette(localPal, 0x40);\r
 742 */\r
 743         PicoOpt = po_old;\r
 744         currentConfig.EmuOpt = eo_old;\r
 745 }\r
 746 \r
 747 void emu_platformDebugCat(char *str)\r
 748 {\r
 749         // nothing\r
 750 }\r
 751 \r
 752 static void simpleWait(int thissec, int lim_time)\r
 753 {\r
 754         struct timeval tval;\r
 755 \r
 756         spend_cycles(1024);\r
 757         gettimeofday(&tval, 0);\r
 758         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 759 \r
 760         while (tval.tv_usec < lim_time)\r
 761         {\r
 762                 spend_cycles(1024);\r
 763                 gettimeofday(&tval, 0);\r
 764                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 765         }\r
 766 }\r
 767 \r
 768 \r
 769 #if 0\r
 770 static void tga_dump(void)\r
 771 {\r
 772 #define BYTE unsigned char\r
 773 #define WORD unsigned short\r
 774         struct\r
 775         {\r
 776                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 777                 BYTE ColorMapType;    /* 01h  Color map type */\r
 778                 BYTE ImageType;       /* 02h  Image type code */\r
 779                 WORD CMapStart;       /* 03h  Color map origin */\r
 780                 WORD CMapLength;      /* 05h  Color map length */\r
 781                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 782                 WORD XOffset;         /* 08h  X origin of image */\r
 783                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 784                 WORD Width;           /* 0Ch  Width of image */\r
 785                 WORD Height;          /* 0Eh  Height of image */\r
 786                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 787                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 788         } __attribute__((packed)) TGAHEAD;\r
 789         static unsigned short oldscr[320*240];\r
 790         FILE *f; char name[128]; int i;\r
 791 \r
 792         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 793         TGAHEAD.ImageType = 2;\r
 794         TGAHEAD.Width = 320;\r
 795         TGAHEAD.Height = 240;\r
 796         TGAHEAD.PixelDepth = 16;\r
 797         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 798 \r
 799 #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 800 \r
 801         for (i = 0; i < 320*240; i++)\r
 802                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
 803         if (i < 320*240)\r
 804         {\r
 805                 for (i = 0; i < 320*240; i++)\r
 806                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
 807                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 808                 f = fopen(name, "wb");\r
 809                 if (!f) { printf("!f\n"); exit(1); }\r
 810                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 811                 fwrite(oldscr, 1, 320*240*2, f);\r
 812                 fclose(f);\r
 813         }\r
 814 }\r
 815 #endif\r
 816 \r
 817 \r
 818 void emu_Loop(void)\r
 819 {\r
 820         static int gp2x_old_clock = 200, EmuOpt_old = 0;\r
 821         char fpsbuff[24]; // fps count c string\r
 822         struct timeval tval; // timing\r
 823         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 824         int  frames_done,  frames_shown,  thissec; // actual frames\r
 825         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 826         char *notice = 0;\r
 827 \r
 828         printf("entered emu_Loop()\n");\r
 829 \r
 830         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 831                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 832                 set_FCLK(currentConfig.CPUclock);\r
 833                 gp2x_old_clock = currentConfig.CPUclock;\r
 834                 printf(" done\n");\r
 835         }\r
 836 \r
 837         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 838                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 839                 gp2x_old_gamma = currentConfig.gamma;\r
 840                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 841         }\r
 842 \r
 843         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 844                 if (currentConfig.EmuOpt&0x2000)\r
 845                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 846                 else unset_LCD_custom_rate();\r
 847         }\r
 848 \r
 849         EmuOpt_old = currentConfig.EmuOpt;\r
 850         fpsbuff[0] = 0;\r
 851 \r
 852         // make sure we are in correct mode\r
 853         vidResetMode();\r
 854         scaling_update();\r
 855         Pico.m.dirtyPal = 1;\r
 856         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 857         emu_findKeyBindCombos();\r
 858 \r
 859         // pal/ntsc might have changed, reset related stuff\r
 860         target_fps = Pico.m.pal ? 50 : 60;\r
 861         target_frametime = 1000000/target_fps;\r
 862         reset_timing = 1;\r
 863 \r
 864         emu_startSound();\r
 865 \r
 866         // prepare CD buffer\r
 867         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
 868 \r
 869         // calc vsync offset to sync timing code with vsync\r
 870         if (currentConfig.EmuOpt&0x2000) {\r
 871                 gettimeofday(&tval, 0);\r
 872                 gp2x_video_wait_vsync();\r
 873                 gettimeofday(&tval, 0);\r
 874                 vsync_offset = tval.tv_usec;\r
 875                 while (vsync_offset >= target_frametime)\r
 876                         vsync_offset -= target_frametime;\r
 877                 if (!vsync_offset) vsync_offset++;\r
 878                 printf("vsync_offset: %i\n", vsync_offset);\r
 879         } else\r
 880                 vsync_offset = 0;\r
 881 \r
 882         frames_done = frames_shown = thissec =\r
 883         pframes_done = pframes_shown = pthissec = 0;\r
 884 \r
 885         // loop\r
 886         while (engineState == PGS_Running)\r
 887         {\r
 888                 int modes;\r
 889 \r
 890                 gettimeofday(&tval, 0);\r
 891                 if (reset_timing) {\r
 892                         reset_timing = 0;\r
 893                         pthissec = tval.tv_sec;\r
 894                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 895                 }\r
 896 \r
 897                 // show notice message?\r
 898                 if (noticeMsgTime.tv_sec)\r
 899                 {\r
 900                         static int noticeMsgSum;\r
 901                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 902                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 903                                 clearArea(0);\r
 904                                 notice = 0;\r
 905                         } else {\r
 906                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 907                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 908                                 notice = noticeMsg;\r
 909                         }\r
 910                 }\r
 911 \r
 912                 // check for mode changes\r
 913                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 914                 if (modes != oldmodes)\r
 915                 {\r
 916                         int scalex = 320;\r
 917                         osd_fps_x = OSD_FPS_X;\r
 918                         if (modes & 4) {\r
 919                                 vidCpyM2 = vidCpyM2_40col;\r
 920                         } else {\r
 921                                 if (PicoOpt & 0x100) {\r
 922                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 923                                         scalex = 256;\r
 924                                         osd_fps_x = OSD_FPS_X - 64;\r
 925                                 } else {\r
 926                                         vidCpyM2 = vidCpyM2_32col;\r
 927                                 }\r
 928                         }\r
 929                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 930                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 931                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 932                         oldmodes = modes;\r
 933                         clearArea(1);\r
 934                 }\r
 935 \r
 936                 // second changed?\r
 937                 if (thissec != tval.tv_sec)\r
 938                 {\r
 939 #ifdef BENCHMARK\r
 940                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 941                         if (++bench == 10) {\r
 942                                 bench = 0;\r
 943                                 bench_fps_s = bench_fps;\r
 944                                 bf[bfp++ & 3] = bench_fps;\r
 945                                 bench_fps = 0;\r
 946                         }\r
 947                         bench_fps += frames_shown;\r
 948                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 949 #else\r
 950                         if (currentConfig.EmuOpt & 2) {\r
 951                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 952                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 953                         }\r
 954 #endif\r
 955                         frames_shown = frames_done = 0;\r
 956                         thissec = tval.tv_sec;\r
 957                 }\r
 958 #ifdef PFRAMES\r
 959                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 960 #endif\r
 961 \r
 962                 if (pthissec != tval.tv_sec)\r
 963                 {\r
 964                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 965                                 pframes_done = pframes_shown = 0;\r
 966                         } else {\r
 967                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 968                                 // when second changes, but we don't want buffer to starve.\r
 969                                 if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 970                                         updateKeys();\r
 971                                         SkipFrame(1); pframes_done++;\r
 972                                 }\r
 973 \r
 974                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 975                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 976                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 977                         }\r
 978                         pthissec = tval.tv_sec;\r
 979                 }\r
 980 \r
 981                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 982                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 983                 {\r
 984                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 985                                 updateKeys();\r
 986                                 SkipFrame(1); pframes_done++; frames_done++;\r
 987                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 988                                         gettimeofday(&tval, 0);\r
 989                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 990                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 991                                                 simpleWait(pthissec, lim_time);\r
 992                                         }\r
 993                                 }\r
 994                                 lim_time += target_frametime;\r
 995                         }\r
 996                 }\r
 997                 else if (tval.tv_usec > lim_time) // auto frameskip\r
 998                 {\r
 999                         // no time left for this frame - skip\r
1000                         if (tval.tv_usec - lim_time >= 300000) {\r
1001                                 /* something caused a slowdown for us (disk access? cache flush?)\r
1002                                  * try to recover by resetting timing... */\r
1003                                 reset_timing = 1;\r
1004                                 continue;\r
1005                         }\r
1006                         updateKeys();\r
1007                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
1008                         continue;\r
1009                 }\r
1010 \r
1011                 updateKeys();\r
1012                 PicoFrame();\r
1013 \r
1014                 // check time\r
1015                 gettimeofday(&tval, 0);\r
1016                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1017 \r
1018                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
1019                         reset_timing = 1;\r
1020                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
1021                 {\r
1022                         // sleep or vsync if we are still too fast\r
1023                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
1024                         if (!reset_timing && tval.tv_usec < lim_time)\r
1025                         {\r
1026                                 // we are too fast\r
1027                                 if (vsync_offset) {\r
1028                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
1029                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
1030                                         gp2x_video_wait_vsync();\r
1031                                 } else {\r
1032                                         simpleWait(pthissec, lim_time);\r
1033                                 }\r
1034                         }\r
1035                 }\r
1036 \r
1037                 blit(fpsbuff, notice);\r
1038 \r
1039                 pframes_done++; pframes_shown++;\r
1040                  frames_done++;  frames_shown++;\r
1041         }\r
1042 \r
1043         emu_changeFastForward(0);\r
1044 \r
1045         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();\r
1046 \r
1047         // save SRAM\r
1048         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
1049                 emu_state_cb("Writing SRAM/BRAM..");\r
1050                 emu_SaveLoadGame(0, 1);\r
1051                 SRam.changed = 0;\r
1052         }\r
1053 \r
1054         // if in 8bit mode, generate 16bit image for menu background\r
1055         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
1056                 emu_forcedFrame(POPT_EN_SOFTSCALE);\r
1057 }\r
1058 \r
1059 \r
1060 void emu_ResetGame(void)\r
1061 {\r
1062         PicoReset();\r
1063         reset_timing = 1;\r
1064 }\r
1065 \r
1066 const char *plat_get_credits(void)\r
1067 {\r
1068         return "PicoDrive v" VERSION " (c) notaz, 2006-2009\n\n\n"\r
1069                 "Credits:\n"\r
1070                 "fDave: Cyclone 68000 core,\n"\r
1071                 "      base code of PicoDrive\n"\r
1072                 "Reesy & FluBBa: DrZ80 core\n"\r
1073                 "MAME devs: YM2612 and SN76496 cores\n"\r
1074                 "rlyeh and others: minimal SDK\n"\r
1075                 "Squidge: squidgehack\n"\r
1076                 "Dzz: ARM940 sample\n"\r
1077                 "GnoStiC / Puck2099: USB joy code\n"\r
1078                 "craigix: GP2X hardware\n"\r
1079                 "ketchupgun: skin design\n"\r
1080                 "\n"\r
1081                 "special thanks (for docs, ideas):\n"\r
1082                 " Charles MacDonald, Haze,\n"\r
1083                 " Stephane Dallongeville,\n"\r
1084                 " Lordus, Exophase, Rokas,\n"\r
1085                 " Nemesis, Tasco Deluxe";\r
1086 }\r