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 static void emu_msg_cb(const char *msg);\r
  57 static void emu_msg_tray_open(void);\r
  58 \r
  59 \r
  60 void emu_noticeMsgUpdated(void)\r
  61 {\r
  62         gettimeofday(&noticeMsgTime, 0);\r
  63 }\r
  64 \r
  65 void emu_getMainDir(char *dst, int len)\r
  66 {\r
  67         extern char **g_argv;\r
  68         int j;\r
  69 \r
  70         strncpy(dst, g_argv[0], len);\r
  71         len -= 32; // reserve\r
  72         if (len < 0) len = 0;\r
  73         dst[len] = 0;\r
  74         for (j = strlen(dst); j > 0; j--)\r
  75                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  76 }\r
  77 \r
  78 void emu_Init(void)\r
  79 {\r
  80         // make temp buffer for alt renderer\r
  81         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  82         if (!PicoDraw2FB)\r
  83         {\r
  84                 printf("PicoDraw2FB == 0\n");\r
  85         }\r
  86 \r
  87         // make dirs for saves, cfgs, etc.\r
  88         mkdir("mds", 0777);\r
  89         mkdir("srm", 0777);\r
  90         mkdir("brm", 0777);\r
  91         mkdir("cfg", 0777);\r
  92 \r
  93         PicoInit();\r
  94         PicoMessage = emu_msg_cb;\r
  95         PicoMCDopenTray = emu_msg_tray_open;\r
  96         PicoMCDcloseTray = menu_loop_tray;\r
  97 }\r
  98 \r
  99 \r
 100 static void scaling_update(void)\r
 101 {\r
 102         PicoOpt &= ~0x4100;\r
 103         switch (currentConfig.scaling) {\r
 104                 default: break; // off\r
 105                 case 1:  // hw hor\r
 106                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 107                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 108         }\r
 109 }\r
 110 \r
 111 \r
 112 void emu_Deinit(void)\r
 113 {\r
 114         // save SRAM\r
 115         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 116                 emu_SaveLoadGame(0, 1);\r
 117                 SRam.changed = 0;\r
 118         }\r
 119 \r
 120         if (!(currentConfig.EmuOpt & 0x20)) {\r
 121                 config_writelrom(PicoConfigFile);\r
 122 #ifndef NO_SYNC\r
 123                 sync();\r
 124 #endif\r
 125         }\r
 126 \r
 127         free(PicoDraw2FB);\r
 128 \r
 129         PicoExit();\r
 130 \r
 131         // restore gamma\r
 132         if (gp2x_old_gamma != 100)\r
 133                 set_gamma(100, 0);\r
 134 }\r
 135 \r
 136 void emu_prepareDefaultConfig(void)\r
 137 {\r
 138         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
 139         defaultConfig.EmuOpt    = 0x1d | 0x00700; // | <- ram_tmng, confirm_save, cd_leds\r
 140         defaultConfig.s_PicoOpt = 0x0f | 0x20e00; // | <- use_940, cd_pcm, cd_cdda, svp drc\r
 141         defaultConfig.s_PsndRate = 44100;\r
 142         defaultConfig.s_PicoRegion = 0; // auto\r
 143         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 144         defaultConfig.s_PicoCDBuffers = 0;\r
 145         defaultConfig.Frameskip = -1; // auto\r
 146         defaultConfig.CPUclock = 200;\r
 147         defaultConfig.volume = 50;\r
 148         defaultConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 149         defaultConfig.KeyBinds[ 4] = 1<<1;\r
 150         defaultConfig.KeyBinds[ 2] = 1<<2;\r
 151         defaultConfig.KeyBinds[ 6] = 1<<3;\r
 152         defaultConfig.KeyBinds[14] = 1<<4;\r
 153         defaultConfig.KeyBinds[13] = 1<<5;\r
 154         defaultConfig.KeyBinds[12] = 1<<6;\r
 155         defaultConfig.KeyBinds[ 8] = 1<<7;\r
 156         defaultConfig.KeyBinds[15] = 1<<26; // switch rend\r
 157         defaultConfig.KeyBinds[10] = 1<<27; // save state\r
 158         defaultConfig.KeyBinds[11] = 1<<28; // load state\r
 159         defaultConfig.KeyBinds[23] = 1<<29; // vol up\r
 160         defaultConfig.KeyBinds[22] = 1<<30; // vol down\r
 161         defaultConfig.gamma = 100;\r
 162         defaultConfig.scaling = 0;\r
 163 }\r
 164 \r
 165 void emu_setDefaultConfig(void)\r
 166 {\r
 167         memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));\r
 168         PicoOpt = currentConfig.s_PicoOpt;\r
 169         PsndRate = currentConfig.s_PsndRate;\r
 170         PicoRegionOverride = currentConfig.s_PicoRegion;\r
 171         PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;\r
 172         PicoCDBuffers = currentConfig.s_PicoCDBuffers;\r
 173 }\r
 174 \r
 175 void osd_text(int x, int y, const char *text)\r
 176 {\r
 177         int len = strlen(text)*8;\r
 178 \r
 179         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 180                 int *p, i, h;\r
 181                 x &= ~3; // align x\r
 182                 len = (len+3) >> 2;\r
 183                 for (h = 0; h < 8; h++) {\r
 184                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 185                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 186                 }\r
 187                 emu_textOut8(x, y, text);\r
 188         } else {\r
 189                 int *p, i, h;\r
 190                 x &= ~1; // align x\r
 191                 len = (len+1) >> 1;\r
 192                 for (h = 0; h < 8; h++) {\r
 193                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 194                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 195                 }\r
 196                 emu_textOut16(x, y, text);\r
 197         }\r
 198 }\r
 199 \r
 200 static void cd_leds(void)\r
 201 {\r
 202 //      static\r
 203         int old_reg;\r
 204 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 205         old_reg = Pico_mcd->s68k_regs[0];\r
 206 \r
 207         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 208                 // 8-bit modes\r
 209                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 210                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 211                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 212                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 213                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 214                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 215                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 216                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 217         } else {\r
 218                 // 16-bit modes\r
 219                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 220                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 221                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 222                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 223                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 224                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 225         }\r
 226 }\r
 227 \r
 228 static int EmuScan16(unsigned int num, void *sdata)\r
 229 {\r
 230         if (!(Pico.video.reg[1]&8)) num += 8;\r
 231         DrawLineDest = (unsigned short *) gp2x_screen + 320*(num+1);\r
 232 \r
 233         return 0;\r
 234 }\r
 235 \r
 236 static int EmuScan8(unsigned int num, void *sdata)\r
 237 {\r
 238         if (!(Pico.video.reg[1]&8)) num += 8;\r
 239         DrawLineDest = (unsigned char *)  gp2x_screen + 320*(num+1);\r
 240 \r
 241         return 0;\r
 242 }\r
 243 \r
 244 int localPal[0x100];\r
 245 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 246 \r
 247 static void blit(const char *fps, const char *notice)\r
 248 {\r
 249         int emu_opt = currentConfig.EmuOpt;\r
 250 \r
 251         if (PicoOpt&0x10)\r
 252         {\r
 253                 // 8bit fast renderer\r
 254                 if (Pico.m.dirtyPal) {\r
 255                         Pico.m.dirtyPal = 0;\r
 256                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 257                         // feed new palette to our device\r
 258                         gp2x_video_setpalette(localPal, 0x40);\r
 259                 }\r
 260                 // a hack for VR\r
 261                 if (PicoRead16Hook == PicoSVPRead16)\r
 262                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 263                 // do actual copy\r
 264                 vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 265         }\r
 266         else if (!(emu_opt&0x80))\r
 267         {\r
 268                 // 8bit accurate renderer\r
 269                 if (Pico.m.dirtyPal) {\r
 270                         Pico.m.dirtyPal = 0;\r
 271                         if(Pico.video.reg[0xC]&8) { // shadow/hilight mode\r
 272                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 273                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 274                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 275                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 276                                 localPal[0xc0] = 0x0000c000;\r
 277                                 localPal[0xd0] = 0x00c00000;\r
 278                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 279                                 localPal[0xf0] = 0x00ffffff;\r
 280                                 gp2x_video_setpalette(localPal, 0x100);\r
 281                         } else if (rendstatus & 0x20) { // mid-frame palette changes\r
 282                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 283                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 284                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 285                                 gp2x_video_setpalette(localPal, 0xc0);\r
 286                         } else {\r
 287                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 288                                 gp2x_video_setpalette(localPal, 0x40);\r
 289                         }\r
 290                 }\r
 291         }\r
 292 \r
 293         if (notice || (emu_opt & 2)) {\r
 294                 int h = 232;\r
 295                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 296                 if (notice) osd_text(4, h, notice);\r
 297                 if (emu_opt & 2)\r
 298                         osd_text(osd_fps_x, h, fps);\r
 299         }\r
 300         if ((emu_opt & 0x400) && (PicoMCD & 1))\r
 301                 cd_leds();\r
 302 \r
 303         //gp2x_video_wait_vsync();\r
 304         gp2x_video_flip();\r
 305 \r
 306         if (!(PicoOpt&0x10)) {\r
 307                 if (!(Pico.video.reg[1]&8)) {\r
 308                         if (currentConfig.EmuOpt&0x80) {\r
 309                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 310                         } else {\r
 311                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 312                         }\r
 313                 } else {\r
 314                         DrawLineDest = gp2x_screen;\r
 315                 }\r
 316         }\r
 317 }\r
 318 \r
 319 \r
 320 // clears whole screen or just the notice area (in all buffers)\r
 321 static void clearArea(int full)\r
 322 {\r
 323         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 324                 // 8-bit renderers\r
 325                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 326                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 327         } else {\r
 328                 // 16bit accurate renderer\r
 329                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 330                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 331         }\r
 332 }\r
 333 \r
 334 \r
 335 static void vidResetMode(void)\r
 336 {\r
 337         if (PicoOpt&0x10) {\r
 338                 gp2x_video_changemode(8);\r
 339         } else if (currentConfig.EmuOpt&0x80) {\r
 340                 gp2x_video_changemode(16);\r
 341                 PicoDrawSetColorFormat(1);\r
 342                 PicoScan = EmuScan16;\r
 343                 PicoScan(0, 0);\r
 344         } else {\r
 345                 gp2x_video_changemode(8);\r
 346                 PicoDrawSetColorFormat(2);\r
 347                 PicoScan = EmuScan8;\r
 348                 PicoScan(0, 0);\r
 349         }\r
 350         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 351                 // setup pal for 8-bit modes\r
 352                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 353                 localPal[0xd0] = 0x00c00000;\r
 354                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 355                 localPal[0xf0] = 0x00ffffff;\r
 356                 gp2x_video_setpalette(localPal, 0x100);\r
 357                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 358                 gp2x_video_flip();\r
 359         }\r
 360         Pico.m.dirtyPal = 1;\r
 361         // reset scaling\r
 362         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 363              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 364         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 365 }\r
 366 \r
 367 \r
 368 static void emu_msg_cb(const char *msg)\r
 369 {\r
 370         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 371                 // 8-bit renderers\r
 372                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 373                 osd_text(4, 232, msg);\r
 374                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 375         } else {\r
 376                 // 16bit accurate renderer\r
 377                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 378                 osd_text(4, 232, msg);\r
 379                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 380         }\r
 381         gettimeofday(&noticeMsgTime, 0);\r
 382         noticeMsgTime.tv_sec -= 2;\r
 383 \r
 384         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 385         reset_timing = 1;\r
 386 }\r
 387 \r
 388 static void emu_state_cb(const char *str)\r
 389 {\r
 390         clearArea(0);\r
 391         blit("", str);\r
 392 }\r
 393 \r
 394 static void emu_msg_tray_open(void)\r
 395 {\r
 396         strcpy(noticeMsg, "CD tray opened");\r
 397         gettimeofday(&noticeMsgTime, 0);\r
 398 }\r
 399 \r
 400 static void update_volume(int has_changed, int is_up)\r
 401 {\r
 402         static int prev_frame = 0, wait_frames = 0;\r
 403         int vol = currentConfig.volume;\r
 404 \r
 405         if (has_changed)\r
 406         {\r
 407                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 408                         wait_frames++;\r
 409                 else {\r
 410                         if (is_up) {\r
 411                                 if (vol < 99) vol++;\r
 412                         } else {\r
 413                                 if (vol >  0) vol--;\r
 414                         }\r
 415                         wait_frames = 0;\r
 416                         gp2x_sound_volume(vol, vol);\r
 417                         currentConfig.volume = vol;\r
 418                 }\r
 419                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 420                 gettimeofday(&noticeMsgTime, 0);\r
 421                 prev_frame = Pico.m.frame_count;\r
 422         }\r
 423 \r
 424         // set the right mixer func\r
 425         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 426         if (vol >= 5)\r
 427                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 428         else {\r
 429                 mix_32_to_16l_level = 5 - vol;\r
 430                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 431         }\r
 432 }\r
 433 \r
 434 static void change_fast_forward(int set_on)\r
 435 {\r
 436         static void *set_PsndOut = NULL;\r
 437         static int set_Frameskip, set_EmuOpt, is_on = 0;\r
 438 \r
 439         if (set_on && !is_on) {\r
 440                 set_PsndOut = PsndOut;\r
 441                 set_Frameskip = currentConfig.Frameskip;\r
 442                 set_EmuOpt = currentConfig.EmuOpt;\r
 443                 PsndOut = NULL;\r
 444                 currentConfig.Frameskip = 8;\r
 445                 currentConfig.EmuOpt &= ~4;\r
 446                 is_on = 1;\r
 447         }\r
 448         else if (!set_on && is_on) {\r
 449                 PsndOut = set_PsndOut;\r
 450                 currentConfig.Frameskip = set_Frameskip;\r
 451                 currentConfig.EmuOpt = set_EmuOpt;\r
 452                 PsndRerate(1);\r
 453                 update_volume(0, 0);\r
 454                 reset_timing = 1;\r
 455                 is_on = 0;\r
 456         }\r
 457 }\r
 458 \r
 459 static void RunEvents(unsigned int which)\r
 460 {\r
 461         if (which & 0x1800) // save or load (but not both)\r
 462         {\r
 463                 int do_it = 1;\r
 464                 if ( emu_checkSaveFile(state_slot) &&\r
 465                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 466                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 467                         unsigned long keys;\r
 468                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 469                         while( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 470                                 usleep(50*1024);\r
 471                         if (keys & GP2X_X) do_it = 0;\r
 472                         clearArea(0);\r
 473                 }\r
 474                 if (do_it) {\r
 475                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 476                         PicoStateProgressCB = emu_state_cb;\r
 477                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 478                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 479                         PicoStateProgressCB = NULL;\r
 480                 }\r
 481 \r
 482                 reset_timing = 1;\r
 483         }\r
 484         if (which & 0x0400) // switch renderer\r
 485         {\r
 486                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 487                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 488                 else   currentConfig.EmuOpt &= ~0x80;\r
 489 \r
 490                 vidResetMode();\r
 491 \r
 492                 if (PicoOpt&0x10) {\r
 493                         strcpy(noticeMsg, " 8bit fast renderer");\r
 494                 } else if (currentConfig.EmuOpt&0x80) {\r
 495                         strcpy(noticeMsg, "16bit accurate renderer");\r
 496                 } else {\r
 497                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 498                 }\r
 499 \r
 500                 gettimeofday(&noticeMsgTime, 0);\r
 501         }\r
 502         if (which & 0x0300)\r
 503         {\r
 504                 if(which&0x0200) {\r
 505                         state_slot -= 1;\r
 506                         if(state_slot < 0) state_slot = 9;\r
 507                 } else {\r
 508                         state_slot += 1;\r
 509                         if(state_slot > 9) state_slot = 0;\r
 510                 }\r
 511                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 512                 gettimeofday(&noticeMsgTime, 0);\r
 513         }\r
 514         if (which & 0x0080) {\r
 515                 engineState = PGS_Menu;\r
 516         }\r
 517 }\r
 518 \r
 519 \r
 520 static void updateKeys(void)\r
 521 {\r
 522         unsigned long keys, allActions[2] = { 0, 0 }, events;\r
 523         static unsigned long prevEvents = 0;\r
 524         int joy, i;\r
 525 \r
 526         keys = gp2x_joystick_read(0);\r
 527         if (keys & GP2X_SELECT) {\r
 528                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 529                 // wait until select is released, so menu would not resume game\r
 530                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 531         }\r
 532 \r
 533         keys &= CONFIGURABLE_KEYS;\r
 534 \r
 535         for (i = 0; i < 32; i++)\r
 536         {\r
 537                 if (keys & (1 << i))\r
 538                 {\r
 539                         int pl, acts = currentConfig.KeyBinds[i];\r
 540                         if (!acts) continue;\r
 541                         pl = (acts >> 16) & 1;\r
 542                         if (kb_combo_keys & (1 << i))\r
 543                         {\r
 544                                 int u = i+1, acts_c = acts & kb_combo_acts;\r
 545                                 // let's try to find the other one\r
 546                                 if (acts_c) {\r
 547                                         for (; u < 32; u++)\r
 548                                                 if ( (keys & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {\r
 549                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];\r
 550                                                         keys &= ~((1 << i) | (1 << u));\r
 551                                                         break;\r
 552                                                 }\r
 553                                 }\r
 554                                 // add non-combo actions if combo ones were not found\r
 555                                 if (!acts_c || u == 32)\r
 556                                         allActions[pl] |= acts & ~kb_combo_acts;\r
 557                         } else {\r
 558                                 allActions[pl] |= acts;\r
 559                         }\r
 560                 }\r
 561         }\r
 562 \r
 563         // add joy inputs\r
 564         if (num_of_joys > 0)\r
 565         {\r
 566                 gp2x_usbjoy_update();\r
 567                 for (joy = 0; joy < num_of_joys; joy++) {\r
 568                         int keys = gp2x_usbjoy_check2(joy);\r
 569                         for (i = 0; i < 32; i++) {\r
 570                                 if (keys & (1 << i)) {\r
 571                                         int acts = currentConfig.JoyBinds[joy][i];\r
 572                                         int pl = (acts >> 16) & 1;\r
 573                                         allActions[pl] |= acts;\r
 574                                 }\r
 575                         }\r
 576                 }\r
 577         }\r
 578 \r
 579         PicoPad[0] = (unsigned short) allActions[0];\r
 580         PicoPad[1] = (unsigned short) allActions[1];\r
 581 \r
 582         events = (allActions[0] | allActions[1]) >> 16;\r
 583 \r
 584         // volume is treated in special way and triggered every frame\r
 585         if (events & 0x6000)\r
 586                 update_volume(1, events & 0x2000);\r
 587 \r
 588         if ((events ^ prevEvents) & 0x40)\r
 589                 change_fast_forward(events & 0x40);\r
 590 \r
 591         events &= ~prevEvents;\r
 592         if (events) RunEvents(events);\r
 593         if (movie_data) emu_updateMovie();\r
 594 \r
 595         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 596 }\r
 597 \r
 598 \r
 599 static void updateSound(int len)\r
 600 {\r
 601         if (PicoOpt&8) len<<=1;\r
 602 \r
 603         /* avoid writing audio when lagging behind to prevent audio lag */\r
 604         if (PicoSkipFrame != 2)\r
 605                 gp2x_sound_write(PsndOut, len<<1);\r
 606 }\r
 607 \r
 608 \r
 609 static void SkipFrame(int do_audio)\r
 610 {\r
 611         PicoSkipFrame=do_audio ? 1 : 2;\r
 612         PicoFrame();\r
 613         PicoSkipFrame=0;\r
 614 }\r
 615 \r
 616 \r
 617 void emu_forcedFrame(void)\r
 618 {\r
 619         int po_old = PicoOpt;\r
 620         int eo_old = currentConfig.EmuOpt;\r
 621 \r
 622         PicoOpt &= ~0x0010;\r
 623         PicoOpt |=  0x4080; // soft_scale | acc_sprites\r
 624         currentConfig.EmuOpt |= 0x80;\r
 625 \r
 626         //vidResetMode();\r
 627         PicoDrawSetColorFormat(1);\r
 628         PicoScan = EmuScan16;\r
 629         PicoScan(0, 0);\r
 630         Pico.m.dirtyPal = 1;\r
 631         PicoFrameDrawOnly();\r
 632 \r
 633 /*\r
 634         if (!(Pico.video.reg[12]&1)) {\r
 635                 vidCpyM2 = vidCpyM2_32col;\r
 636                 clearArea(1);\r
 637         } else  vidCpyM2 = vidCpyM2_40col;\r
 638 \r
 639         vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 640         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 641         gp2x_video_setpalette(localPal, 0x40);\r
 642 */\r
 643         PicoOpt = po_old;\r
 644         currentConfig.EmuOpt = eo_old;\r
 645 }\r
 646 \r
 647 static void simpleWait(int thissec, int lim_time)\r
 648 {\r
 649         struct timeval tval;\r
 650 \r
 651         spend_cycles(1024);\r
 652         gettimeofday(&tval, 0);\r
 653         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 654 \r
 655         while (tval.tv_usec < lim_time)\r
 656         {\r
 657                 spend_cycles(1024);\r
 658                 gettimeofday(&tval, 0);\r
 659                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 660         }\r
 661 }\r
 662 \r
 663 \r
 664 #if 0\r
 665 static void tga_dump(void)\r
 666 {\r
 667 #define BYTE unsigned char\r
 668 #define WORD unsigned short\r
 669         struct\r
 670         {\r
 671                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 672                 BYTE ColorMapType;    /* 01h  Color map type */\r
 673                 BYTE ImageType;       /* 02h  Image type code */\r
 674                 WORD CMapStart;       /* 03h  Color map origin */\r
 675                 WORD CMapLength;      /* 05h  Color map length */\r
 676                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 677                 WORD XOffset;         /* 08h  X origin of image */\r
 678                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 679                 WORD Width;           /* 0Ch  Width of image */\r
 680                 WORD Height;          /* 0Eh  Height of image */\r
 681                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 682                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 683         } __attribute__((packed)) TGAHEAD;\r
 684         static unsigned short oldscr[320*240];\r
 685         FILE *f; char name[128]; int i;\r
 686 \r
 687         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 688         TGAHEAD.ImageType = 2;\r
 689         TGAHEAD.Width = 320;\r
 690         TGAHEAD.Height = 240;\r
 691         TGAHEAD.PixelDepth = 16;\r
 692         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 693 \r
 694 #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 695 \r
 696         for (i = 0; i < 320*240; i++)\r
 697                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
 698         if (i < 320*240)\r
 699         {\r
 700                 for (i = 0; i < 320*240; i++)\r
 701                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
 702                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 703                 f = fopen(name, "wb");\r
 704                 if (!f) { printf("!f\n"); exit(1); }\r
 705                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 706                 fwrite(oldscr, 1, 320*240*2, f);\r
 707                 fclose(f);\r
 708         }\r
 709 }\r
 710 #endif\r
 711 \r
 712 \r
 713 void emu_Loop(void)\r
 714 {\r
 715         static int gp2x_old_clock = 200;\r
 716         static int PsndRate_old = 0, PicoOpt_old = 0, EmuOpt_old = 0, pal_old = 0;\r
 717         char fpsbuff[24]; // fps count c string\r
 718         struct timeval tval; // timing\r
 719         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 720         int  frames_done,  frames_shown,  thissec; // actual frames\r
 721         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 722         char *notice = 0;\r
 723 \r
 724         printf("entered emu_Loop()\n");\r
 725 \r
 726         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 727                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 728                 set_FCLK(currentConfig.CPUclock);\r
 729                 gp2x_old_clock = currentConfig.CPUclock;\r
 730                 printf(" done\n");\r
 731         }\r
 732 \r
 733         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 734                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 735                 gp2x_old_gamma = currentConfig.gamma;\r
 736                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 737         }\r
 738 \r
 739         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 740                 if (currentConfig.EmuOpt&0x2000)\r
 741                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 742                 else unset_LCD_custom_rate();\r
 743         }\r
 744 \r
 745         EmuOpt_old = currentConfig.EmuOpt;\r
 746         fpsbuff[0] = 0;\r
 747 \r
 748         // make sure we are in correct mode\r
 749         vidResetMode();\r
 750         scaling_update();\r
 751         Pico.m.dirtyPal = 1;\r
 752         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 753         emu_findKeyBindCombos();\r
 754 \r
 755         // pal/ntsc might have changed, reset related stuff\r
 756         target_fps = Pico.m.pal ? 50 : 60;\r
 757         target_frametime = 1000000/target_fps;\r
 758         reset_timing = 1;\r
 759 \r
 760         // prepare sound stuff\r
 761         if (currentConfig.EmuOpt & 4)\r
 762         {\r
 763                 int snd_excess_add;\r
 764                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 765                                 ((PicoOpt&0x200) && crashed_940)) {\r
 766                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 767                 }\r
 768                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 769                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 770                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 771                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
 772                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
 773                 PicoWriteSound = updateSound;\r
 774                 update_volume(0, 0);\r
 775                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 776                 PsndOut = sndBuffer;\r
 777                 PsndRate_old = PsndRate;\r
 778                 PicoOpt_old  = PicoOpt;\r
 779                 pal_old = Pico.m.pal;\r
 780         } else {\r
 781                 PsndOut = NULL;\r
 782         }\r
 783 \r
 784         // prepare CD buffer\r
 785         if (PicoMCD & 1) PicoCDBufferInit();\r
 786 \r
 787         // calc vsync offset to sync timing code with vsync\r
 788         if (currentConfig.EmuOpt&0x2000) {\r
 789                 gettimeofday(&tval, 0);\r
 790                 gp2x_video_wait_vsync();\r
 791                 gettimeofday(&tval, 0);\r
 792                 vsync_offset = tval.tv_usec;\r
 793                 while (vsync_offset >= target_frametime)\r
 794                         vsync_offset -= target_frametime;\r
 795                 if (!vsync_offset) vsync_offset++;\r
 796                 printf("vsync_offset: %i\n", vsync_offset);\r
 797         } else\r
 798                 vsync_offset = 0;\r
 799 \r
 800         frames_done = frames_shown = thissec =\r
 801         pframes_done = pframes_shown = pthissec = 0;\r
 802 \r
 803         // loop\r
 804         while (engineState == PGS_Running)\r
 805         {\r
 806                 int modes;\r
 807 \r
 808                 gettimeofday(&tval, 0);\r
 809                 if (reset_timing) {\r
 810                         reset_timing = 0;\r
 811                         pthissec = tval.tv_sec;\r
 812                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 813                 }\r
 814 \r
 815                 // show notice message?\r
 816                 if (noticeMsgTime.tv_sec)\r
 817                 {\r
 818                         static int noticeMsgSum;\r
 819                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 820                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 821                                 clearArea(0);\r
 822                                 notice = 0;\r
 823                         } else {\r
 824                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 825                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 826                                 notice = noticeMsg;\r
 827                         }\r
 828                 }\r
 829 \r
 830                 // check for mode changes\r
 831                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 832                 if (modes != oldmodes)\r
 833                 {\r
 834                         int scalex = 320;\r
 835                         osd_fps_x = OSD_FPS_X;\r
 836                         if (modes & 4) {\r
 837                                 vidCpyM2 = vidCpyM2_40col;\r
 838                         } else {\r
 839                                 if (PicoOpt & 0x100) {\r
 840                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 841                                         scalex = 256;\r
 842                                         osd_fps_x = OSD_FPS_X - 64;\r
 843                                 } else {\r
 844                                         vidCpyM2 = vidCpyM2_32col;\r
 845                                 }\r
 846                         }\r
 847                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 848                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 849                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 850                         oldmodes = modes;\r
 851                         clearArea(1);\r
 852                 }\r
 853 \r
 854                 // second changed?\r
 855                 if (thissec != tval.tv_sec)\r
 856                 {\r
 857 #ifdef BENCHMARK\r
 858                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 859                         if (++bench == 10) {\r
 860                                 bench = 0;\r
 861                                 bench_fps_s = bench_fps;\r
 862                                 bf[bfp++ & 3] = bench_fps;\r
 863                                 bench_fps = 0;\r
 864                         }\r
 865                         bench_fps += frames_shown;\r
 866                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 867 #else\r
 868                         if (currentConfig.EmuOpt & 2) {\r
 869                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 870                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 871                         }\r
 872 #endif\r
 873                         frames_shown = frames_done = 0;\r
 874                         thissec = tval.tv_sec;\r
 875                 }\r
 876 #ifdef PFRAMES\r
 877                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 878 #endif\r
 879 \r
 880                 if (pthissec != tval.tv_sec)\r
 881                 {\r
 882                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 883                                 pframes_done = pframes_shown = 0;\r
 884                         } else {\r
 885                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 886                                 // when second changes, but we don't want buffer to starve.\r
 887                                 if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 888                                         updateKeys();\r
 889                                         SkipFrame(1); pframes_done++;\r
 890                                 }\r
 891 \r
 892                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 893                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 894                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 895                         }\r
 896                         pthissec = tval.tv_sec;\r
 897                 }\r
 898 \r
 899                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 900                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 901                 {\r
 902                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 903                                 updateKeys();\r
 904                                 SkipFrame(1); pframes_done++; frames_done++;\r
 905                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 906                                         gettimeofday(&tval, 0);\r
 907                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 908                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 909                                                 simpleWait(pthissec, lim_time);\r
 910                                         }\r
 911                                 }\r
 912                                 lim_time += target_frametime;\r
 913                         }\r
 914                 }\r
 915                 else if (tval.tv_usec > lim_time) // auto frameskip\r
 916                 {\r
 917                         // no time left for this frame - skip\r
 918                         if (tval.tv_usec - lim_time >= 300000) {\r
 919                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 920                                  * try to recover by resetting timing... */\r
 921                                 reset_timing = 1;\r
 922                                 continue;\r
 923                         }\r
 924                         updateKeys();\r
 925                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
 926                         continue;\r
 927                 }\r
 928 \r
 929                 updateKeys();\r
 930                 PicoFrame();\r
 931 \r
 932                 // check time\r
 933                 gettimeofday(&tval, 0);\r
 934                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 935 \r
 936                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 937                         reset_timing = 1;\r
 938                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 939                 {\r
 940                         // sleep or vsync if we are still too fast\r
 941                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 942                         if (!reset_timing && tval.tv_usec < lim_time)\r
 943                         {\r
 944                                 // we are too fast\r
 945                                 if (vsync_offset) {\r
 946                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 947                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
 948                                         gp2x_video_wait_vsync();\r
 949                                 } else {\r
 950                                         simpleWait(pthissec, lim_time);\r
 951                                 }\r
 952                         }\r
 953                 }\r
 954 \r
 955                 blit(fpsbuff, notice);\r
 956 \r
 957                 pframes_done++; pframes_shown++;\r
 958                  frames_done++;  frames_shown++;\r
 959         }\r
 960 \r
 961         change_fast_forward(0);\r
 962 \r
 963         if (PicoMCD & 1) PicoCDBufferFree();\r
 964 \r
 965         // save SRAM\r
 966         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 967                 emu_state_cb("Writing SRAM/BRAM..");\r
 968                 emu_SaveLoadGame(0, 1);\r
 969                 SRam.changed = 0;\r
 970         }\r
 971 \r
 972         // if in 8bit mode, generate 16bit image for menu background\r
 973         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
 974                 emu_forcedFrame();\r
 975 }\r
 976 \r
 977 \r
 978 void emu_ResetGame(void)\r
 979 {\r
 980         PicoReset(0);\r
 981         reset_timing = 1;\r
 982 }\r
 983 \r