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 combo_keys = 0, combo_acts = 0;      // keys and actions which need button combos\r
  52 static int gp2x_old_gamma = 100;\r
  53 char noticeMsg[64];                     // notice msg to draw\r
  54 unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer\r
  55 int reset_timing = 0;\r
  56 \r
  57 static void emu_msg_cb(const char *msg);\r
  58 static void emu_msg_tray_open(void);\r
  59 \r
  60 \r
  61 void emu_noticeMsgUpdated(void)\r
  62 {\r
  63         gettimeofday(&noticeMsgTime, 0);\r
  64 }\r
  65 \r
  66 void emu_getMainDir(char *dst, int len)\r
  67 {\r
  68         extern char **g_argv;\r
  69         int j;\r
  70 \r
  71         strncpy(dst, g_argv[0], len);\r
  72         len -= 32; // reserve\r
  73         if (len < 0) len = 0;\r
  74         dst[len] = 0;\r
  75         for (j = strlen(dst); j > 0; j--)\r
  76                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  77 }\r
  78 \r
  79 void emu_Init(void)\r
  80 {\r
  81         // make temp buffer for alt renderer\r
  82         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  83         if (!PicoDraw2FB)\r
  84         {\r
  85                 printf("PicoDraw2FB == 0\n");\r
  86         }\r
  87 \r
  88         // make dirs for saves, cfgs, etc.\r
  89         mkdir("mds", 0777);\r
  90         mkdir("srm", 0777);\r
  91         mkdir("brm", 0777);\r
  92         mkdir("cfg", 0777);\r
  93 \r
  94         PicoInit();\r
  95         PicoMessage = emu_msg_cb;\r
  96         PicoMCDopenTray = emu_msg_tray_open;\r
  97         PicoMCDcloseTray = menu_loop_tray;\r
  98 }\r
  99 \r
 100 \r
 101 static void find_combos(void)\r
 102 {\r
 103         int act, u;\r
 104 \r
 105         // find out which keys and actions are combos\r
 106         combo_keys = combo_acts = 0;\r
 107         for (act = 0; act < 32; act++)\r
 108         {\r
 109                 int keyc = 0, keyc2 = 0;\r
 110                 if (act == 16 || act == 17) continue; // player2 flag\r
 111                 if (act > 17)\r
 112                 {\r
 113                         for (u = 0; u < 32; u++)\r
 114                                 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;\r
 115                 }\r
 116                 else\r
 117                 {\r
 118                         for (u = 0; u < 32; u++)\r
 119                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 0 && // pl. 1\r
 120                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc++;\r
 121                         for (u = 0; u < 32; u++)\r
 122                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 1 && // pl. 2\r
 123                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc2++;\r
 124                         if (keyc2 > keyc) keyc = keyc2;\r
 125                 }\r
 126                 if (keyc > 1)\r
 127                 {\r
 128                         // loop again and mark those keys and actions as combo\r
 129                         for (u = 0; u < 32; u++)\r
 130                         {\r
 131                                 if (currentConfig.KeyBinds[u] & (1 << act)) {\r
 132                                         combo_keys |= 1 << u;\r
 133                                         combo_acts |= 1 << act;\r
 134                                 }\r
 135                         }\r
 136                 }\r
 137         }\r
 138 \r
 139         // printf("combo keys/acts: %08x %08x\n", combo_keys, combo_acts);\r
 140 }\r
 141 \r
 142 \r
 143 static void scaling_update(void)\r
 144 {\r
 145         PicoOpt &= ~0x4100;\r
 146         switch (currentConfig.scaling) {\r
 147                 default: break; // off\r
 148                 case 1:  // hw hor\r
 149                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 150                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 151         }\r
 152 }\r
 153 \r
 154 \r
 155 void emu_Deinit(void)\r
 156 {\r
 157         // save SRAM\r
 158         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 159                 emu_SaveLoadGame(0, 1);\r
 160                 SRam.changed = 0;\r
 161         }\r
 162 \r
 163         if (!(currentConfig.EmuOpt & 0x20)) {\r
 164                 config_writelrom(PicoConfigFile);\r
 165 #ifndef NO_SYNC\r
 166                 sync();\r
 167 #endif\r
 168         }\r
 169 \r
 170         free(PicoDraw2FB);\r
 171 \r
 172         PicoExit();\r
 173 \r
 174         // restore gamma\r
 175         if (gp2x_old_gamma != 100)\r
 176                 set_gamma(100, 0);\r
 177 }\r
 178 \r
 179 void emu_prepareDefaultConfig(void)\r
 180 {\r
 181         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
 182         defaultConfig.EmuOpt    = 0x1d | 0x00700; // | <- ram_tmng, confirm_save, cd_leds\r
 183         defaultConfig.s_PicoOpt = 0x0f | 0x20e00; // | <- use_940, cd_pcm, cd_cdda, svp drc\r
 184         defaultConfig.s_PsndRate = 44100;\r
 185         defaultConfig.s_PicoRegion = 0; // auto\r
 186         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 187         defaultConfig.s_PicoCDBuffers = 64;\r
 188         defaultConfig.Frameskip = -1; // auto\r
 189         defaultConfig.CPUclock = 200;\r
 190         defaultConfig.volume = 50;\r
 191         defaultConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 192         defaultConfig.KeyBinds[ 4] = 1<<1;\r
 193         defaultConfig.KeyBinds[ 2] = 1<<2;\r
 194         defaultConfig.KeyBinds[ 6] = 1<<3;\r
 195         defaultConfig.KeyBinds[14] = 1<<4;\r
 196         defaultConfig.KeyBinds[13] = 1<<5;\r
 197         defaultConfig.KeyBinds[12] = 1<<6;\r
 198         defaultConfig.KeyBinds[ 8] = 1<<7;\r
 199         defaultConfig.KeyBinds[15] = 1<<26; // switch rend\r
 200         defaultConfig.KeyBinds[10] = 1<<27; // save state\r
 201         defaultConfig.KeyBinds[11] = 1<<28; // load state\r
 202         defaultConfig.KeyBinds[23] = 1<<29; // vol up\r
 203         defaultConfig.KeyBinds[22] = 1<<30; // vol down\r
 204         defaultConfig.gamma = 100;\r
 205         defaultConfig.scaling = 0;\r
 206 }\r
 207 \r
 208 void emu_setDefaultConfig(void)\r
 209 {\r
 210         memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));\r
 211         PicoOpt = currentConfig.s_PicoOpt;\r
 212         PsndRate = currentConfig.s_PsndRate;\r
 213         PicoRegionOverride = currentConfig.s_PicoRegion;\r
 214         PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;\r
 215         PicoCDBuffers = currentConfig.s_PicoCDBuffers;\r
 216 }\r
 217 \r
 218 void osd_text(int x, int y, const char *text)\r
 219 {\r
 220         int len = strlen(text)*8;\r
 221 \r
 222         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 223                 int *p, i, h;\r
 224                 x &= ~3; // align x\r
 225                 len = (len+3) >> 2;\r
 226                 for (h = 0; h < 8; h++) {\r
 227                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 228                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 229                 }\r
 230                 emu_textOut8(x, y, text);\r
 231         } else {\r
 232                 int *p, i, h;\r
 233                 x &= ~1; // align x\r
 234                 len = (len+1) >> 1;\r
 235                 for (h = 0; h < 8; h++) {\r
 236                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 237                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 238                 }\r
 239                 emu_textOut16(x, y, text);\r
 240         }\r
 241 }\r
 242 \r
 243 static void cd_leds(void)\r
 244 {\r
 245 //      static\r
 246         int old_reg;\r
 247 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 248         old_reg = Pico_mcd->s68k_regs[0];\r
 249 \r
 250         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 251                 // 8-bit modes\r
 252                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 253                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 254                 *(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =\r
 255                 *(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =\r
 256                 *(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;\r
 257                 *(unsigned int *)((char *)gp2x_screen + 320*2+12) =\r
 258                 *(unsigned int *)((char *)gp2x_screen + 320*3+12) =\r
 259                 *(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;\r
 260         } else {\r
 261                 // 16-bit modes\r
 262                 unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);\r
 263                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 264                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 265                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 266                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 267                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 268         }\r
 269 }\r
 270 \r
 271 static int EmuScan16(unsigned int num, void *sdata)\r
 272 {\r
 273         if (!(Pico.video.reg[1]&8)) num += 8;\r
 274         DrawLineDest = (unsigned short *) gp2x_screen + 320*(num+1);\r
 275 \r
 276         return 0;\r
 277 }\r
 278 \r
 279 static int EmuScan8(unsigned int num, void *sdata)\r
 280 {\r
 281         if (!(Pico.video.reg[1]&8)) num += 8;\r
 282         DrawLineDest = (unsigned char *)  gp2x_screen + 320*(num+1);\r
 283 \r
 284         return 0;\r
 285 }\r
 286 \r
 287 int localPal[0x100];\r
 288 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 289 \r
 290 static void blit(const char *fps, const char *notice)\r
 291 {\r
 292         int emu_opt = currentConfig.EmuOpt;\r
 293 \r
 294         if (PicoOpt&0x10)\r
 295         {\r
 296                 // 8bit fast renderer\r
 297                 if (Pico.m.dirtyPal) {\r
 298                         Pico.m.dirtyPal = 0;\r
 299                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 300                         // feed new palette to our device\r
 301                         gp2x_video_setpalette(localPal, 0x40);\r
 302                 }\r
 303                 // a hack for VR\r
 304                 if (PicoRead16Hook == PicoSVPRead16)\r
 305                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 306                 // do actual copy\r
 307                 vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 308         }\r
 309         else if (!(emu_opt&0x80))\r
 310         {\r
 311                 // 8bit accurate renderer\r
 312                 if (Pico.m.dirtyPal) {\r
 313                         Pico.m.dirtyPal = 0;\r
 314                         if(Pico.video.reg[0xC]&8) { // shadow/hilight mode\r
 315                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 316                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 317                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 318                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*4);\r
 319                                 localPal[0xc0] = 0x0000c000;\r
 320                                 localPal[0xd0] = 0x00c00000;\r
 321                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 322                                 localPal[0xf0] = 0x00ffffff;\r
 323                                 gp2x_video_setpalette(localPal, 0x100);\r
 324                         } else if (rendstatus & 0x20) { // mid-frame palette changes\r
 325                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 326                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 327                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 328                                 gp2x_video_setpalette(localPal, 0xc0);\r
 329                         } else {\r
 330                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 331                                 gp2x_video_setpalette(localPal, 0x40);\r
 332                         }\r
 333                 }\r
 334         }\r
 335 \r
 336         if (notice || (emu_opt & 2)) {\r
 337                 int h = 232;\r
 338                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 339                 if (notice) osd_text(4, h, notice);\r
 340                 if (emu_opt & 2)\r
 341                         osd_text(osd_fps_x, h, fps);\r
 342         }\r
 343         if ((emu_opt & 0x400) && (PicoMCD & 1))\r
 344                 cd_leds();\r
 345 \r
 346         //gp2x_video_wait_vsync();\r
 347         gp2x_video_flip();\r
 348 \r
 349         if (!(PicoOpt&0x10)) {\r
 350                 if (!(Pico.video.reg[1]&8)) {\r
 351                         if (currentConfig.EmuOpt&0x80) {\r
 352                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 353                         } else {\r
 354                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 355                         }\r
 356                 } else {\r
 357                         DrawLineDest = gp2x_screen;\r
 358                 }\r
 359         }\r
 360 }\r
 361 \r
 362 \r
 363 // clears whole screen or just the notice area (in all buffers)\r
 364 static void clearArea(int full)\r
 365 {\r
 366         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 367                 // 8-bit renderers\r
 368                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 369                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 370         } else {\r
 371                 // 16bit accurate renderer\r
 372                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 373                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 374         }\r
 375 }\r
 376 \r
 377 \r
 378 static void vidResetMode(void)\r
 379 {\r
 380         if (PicoOpt&0x10) {\r
 381                 gp2x_video_changemode(8);\r
 382         } else if (currentConfig.EmuOpt&0x80) {\r
 383                 gp2x_video_changemode(16);\r
 384                 PicoDrawSetColorFormat(1);\r
 385                 PicoScan = EmuScan16;\r
 386                 PicoScan(0, 0);\r
 387         } else {\r
 388                 gp2x_video_changemode(8);\r
 389                 PicoDrawSetColorFormat(2);\r
 390                 PicoScan = EmuScan8;\r
 391                 PicoScan(0, 0);\r
 392         }\r
 393         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 394                 // setup pal for 8-bit modes\r
 395                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 396                 localPal[0xd0] = 0x00c00000;\r
 397                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 398                 localPal[0xf0] = 0x00ffffff;\r
 399                 gp2x_video_setpalette(localPal, 0x100);\r
 400                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 401                 gp2x_video_flip();\r
 402         }\r
 403         Pico.m.dirtyPal = 1;\r
 404         // reset scaling\r
 405         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 406              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 407         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 408 }\r
 409 \r
 410 \r
 411 static void emu_msg_cb(const char *msg)\r
 412 {\r
 413         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 414                 // 8-bit renderers\r
 415                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 416                 osd_text(4, 232, msg);\r
 417                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);\r
 418         } else {\r
 419                 // 16bit accurate renderer\r
 420                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 421                 osd_text(4, 232, msg);\r
 422                 gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);\r
 423         }\r
 424         gettimeofday(&noticeMsgTime, 0);\r
 425         noticeMsgTime.tv_sec -= 2;\r
 426 \r
 427         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 428         reset_timing = 1;\r
 429 }\r
 430 \r
 431 static void emu_state_cb(const char *str)\r
 432 {\r
 433         clearArea(0);\r
 434         blit("", str);\r
 435 }\r
 436 \r
 437 static void emu_msg_tray_open(void)\r
 438 {\r
 439         strcpy(noticeMsg, "CD tray opened");\r
 440         gettimeofday(&noticeMsgTime, 0);\r
 441 }\r
 442 \r
 443 static void update_volume(int has_changed, int is_up)\r
 444 {\r
 445         static int prev_frame = 0, wait_frames = 0;\r
 446         int vol = currentConfig.volume;\r
 447 \r
 448         if (has_changed)\r
 449         {\r
 450                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 451                         wait_frames++;\r
 452                 else {\r
 453                         if (is_up) {\r
 454                                 if (vol < 99) vol++;\r
 455                         } else {\r
 456                                 if (vol >  0) vol--;\r
 457                         }\r
 458                         wait_frames = 0;\r
 459                         gp2x_sound_volume(vol, vol);\r
 460                         currentConfig.volume = vol;\r
 461                 }\r
 462                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 463                 gettimeofday(&noticeMsgTime, 0);\r
 464                 prev_frame = Pico.m.frame_count;\r
 465         }\r
 466 \r
 467         // set the right mixer func\r
 468         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 469         if (vol >= 5)\r
 470                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 471         else {\r
 472                 mix_32_to_16l_level = 5 - vol;\r
 473                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 474         }\r
 475 }\r
 476 \r
 477 static void change_fast_forward(int set_on)\r
 478 {\r
 479         static void *set_PsndOut = NULL;\r
 480         static int set_Frameskip, set_EmuOpt, is_on = 0;\r
 481 \r
 482         if (set_on && !is_on) {\r
 483                 set_PsndOut = PsndOut;\r
 484                 set_Frameskip = currentConfig.Frameskip;\r
 485                 set_EmuOpt = currentConfig.EmuOpt;\r
 486                 PsndOut = NULL;\r
 487                 currentConfig.Frameskip = 8;\r
 488                 currentConfig.EmuOpt &= ~4;\r
 489                 is_on = 1;\r
 490         }\r
 491         else if (!set_on && is_on) {\r
 492                 PsndOut = set_PsndOut;\r
 493                 currentConfig.Frameskip = set_Frameskip;\r
 494                 currentConfig.EmuOpt = set_EmuOpt;\r
 495                 PsndRerate(1);\r
 496                 update_volume(0, 0);\r
 497                 reset_timing = 1;\r
 498                 is_on = 0;\r
 499         }\r
 500 }\r
 501 \r
 502 static void RunEvents(unsigned int which)\r
 503 {\r
 504         if (which & 0x1800) // save or load (but not both)\r
 505         {\r
 506                 int do_it = 1;\r
 507                 if ( emu_checkSaveFile(state_slot) &&\r
 508                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 509                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 510                         unsigned long keys;\r
 511                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 512                         while( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 513                                 usleep(50*1024);\r
 514                         if (keys & GP2X_X) do_it = 0;\r
 515                         clearArea(0);\r
 516                 }\r
 517                 if (do_it) {\r
 518                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 519                         PicoStateProgressCB = emu_state_cb;\r
 520                         gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);\r
 521                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 522                         PicoStateProgressCB = NULL;\r
 523                 }\r
 524 \r
 525                 reset_timing = 1;\r
 526         }\r
 527         if (which & 0x0400) // switch renderer\r
 528         {\r
 529                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 530                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 531                 else   currentConfig.EmuOpt &= ~0x80;\r
 532 \r
 533                 vidResetMode();\r
 534 \r
 535                 if (PicoOpt&0x10) {\r
 536                         strcpy(noticeMsg, " 8bit fast renderer");\r
 537                 } else if (currentConfig.EmuOpt&0x80) {\r
 538                         strcpy(noticeMsg, "16bit accurate renderer");\r
 539                 } else {\r
 540                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 541                 }\r
 542 \r
 543                 gettimeofday(&noticeMsgTime, 0);\r
 544         }\r
 545         if (which & 0x0300)\r
 546         {\r
 547                 if(which&0x0200) {\r
 548                         state_slot -= 1;\r
 549                         if(state_slot < 0) state_slot = 9;\r
 550                 } else {\r
 551                         state_slot += 1;\r
 552                         if(state_slot > 9) state_slot = 0;\r
 553                 }\r
 554                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 555                 gettimeofday(&noticeMsgTime, 0);\r
 556         }\r
 557         if (which & 0x0080) {\r
 558                 engineState = PGS_Menu;\r
 559         }\r
 560 }\r
 561 \r
 562 \r
 563 static void updateKeys(void)\r
 564 {\r
 565         unsigned long keys, allActions[2] = { 0, 0 }, events;\r
 566         static unsigned long prevEvents = 0;\r
 567         int joy, i;\r
 568 \r
 569         keys = gp2x_joystick_read(0);\r
 570         if (keys & GP2X_SELECT) {\r
 571                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 572                 // wait until select is released, so menu would not resume game\r
 573                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 574         }\r
 575 \r
 576         keys &= CONFIGURABLE_KEYS;\r
 577 \r
 578         for (i = 0; i < 32; i++)\r
 579         {\r
 580                 if (keys & (1 << i)) {\r
 581                         int pl, acts = currentConfig.KeyBinds[i];\r
 582                         if (!acts) continue;\r
 583                         pl = (acts >> 16) & 1;\r
 584                         if (combo_keys & (1 << i)) {\r
 585                                 int u = i+1, acts_c = acts & combo_acts;\r
 586                                 // let's try to find the other one\r
 587                                 if (acts_c)\r
 588                                         for (; u < 32; u++)\r
 589                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {\r
 590                                                         allActions[pl] |= acts_c;\r
 591                                                         keys &= ~((1 << i) | (1 << u));\r
 592                                                         break;\r
 593                                                 }\r
 594                                 // add non-combo actions if combo ones were not found\r
 595                                 if (!acts_c || u == 32)\r
 596                                         allActions[pl] |= acts & ~combo_acts;\r
 597                         } else {\r
 598                                 allActions[pl] |= acts;\r
 599                         }\r
 600                 }\r
 601         }\r
 602 \r
 603         // add joy inputs\r
 604         if (num_of_joys > 0)\r
 605         {\r
 606                 gp2x_usbjoy_update();\r
 607                 for (joy = 0; joy < num_of_joys; joy++) {\r
 608                         int keys = gp2x_usbjoy_check2(joy);\r
 609                         for (i = 0; i < 32; i++) {\r
 610                                 if (keys & (1 << i)) {\r
 611                                         int acts = currentConfig.JoyBinds[joy][i];\r
 612                                         int pl = (acts >> 16) & 1;\r
 613                                         allActions[pl] |= acts;\r
 614                                 }\r
 615                         }\r
 616                 }\r
 617         }\r
 618 \r
 619         PicoPad[0] = (unsigned short) allActions[0];\r
 620         PicoPad[1] = (unsigned short) allActions[1];\r
 621 \r
 622         events = (allActions[0] | allActions[1]) >> 16;\r
 623 \r
 624         // volume is treated in special way and triggered every frame\r
 625         if (events & 0x6000)\r
 626                 update_volume(1, events & 0x2000);\r
 627 \r
 628         if ((events ^ prevEvents) & 0x40)\r
 629                 change_fast_forward(events & 0x40);\r
 630 \r
 631         events &= ~prevEvents;\r
 632         if (events) RunEvents(events);\r
 633         if (movie_data) emu_updateMovie();\r
 634 \r
 635         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 636 }\r
 637 \r
 638 \r
 639 static void updateSound(int len)\r
 640 {\r
 641         if (PicoOpt&8) len<<=1;\r
 642 \r
 643         /* avoid writing audio when lagging behind to prevent audio lag */\r
 644         if (PicoSkipFrame != 2)\r
 645                 gp2x_sound_write(PsndOut, len<<1);\r
 646 }\r
 647 \r
 648 \r
 649 static void SkipFrame(int do_audio)\r
 650 {\r
 651         PicoSkipFrame=do_audio ? 1 : 2;\r
 652         PicoFrame();\r
 653         PicoSkipFrame=0;\r
 654 }\r
 655 \r
 656 \r
 657 void emu_forcedFrame(void)\r
 658 {\r
 659         int po_old = PicoOpt;\r
 660         int eo_old = currentConfig.EmuOpt;\r
 661 \r
 662         PicoOpt &= ~0x0010;\r
 663         PicoOpt |=  0x4080; // soft_scale | acc_sprites\r
 664         currentConfig.EmuOpt |= 0x80;\r
 665 \r
 666         //vidResetMode();\r
 667         PicoDrawSetColorFormat(1);\r
 668         PicoScan = EmuScan16;\r
 669         PicoScan(0, 0);\r
 670         Pico.m.dirtyPal = 1;\r
 671         PicoFrameDrawOnly();\r
 672 \r
 673 /*\r
 674         if (!(Pico.video.reg[12]&1)) {\r
 675                 vidCpyM2 = vidCpyM2_32col;\r
 676                 clearArea(1);\r
 677         } else  vidCpyM2 = vidCpyM2_40col;\r
 678 \r
 679         vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);\r
 680         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 681         gp2x_video_setpalette(localPal, 0x40);\r
 682 */\r
 683         PicoOpt = po_old;\r
 684         currentConfig.EmuOpt = eo_old;\r
 685 }\r
 686 \r
 687 static void simpleWait(int thissec, int lim_time)\r
 688 {\r
 689         struct timeval tval;\r
 690 \r
 691         spend_cycles(1024);\r
 692         gettimeofday(&tval, 0);\r
 693         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 694 \r
 695         while(tval.tv_usec < lim_time)\r
 696         {\r
 697                 spend_cycles(1024);\r
 698                 gettimeofday(&tval, 0);\r
 699                 if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 700         }\r
 701 }\r
 702 \r
 703 \r
 704 void emu_Loop(void)\r
 705 {\r
 706         static int gp2x_old_clock = 200;\r
 707         static int PsndRate_old = 0, PicoOpt_old = 0, EmuOpt_old = 0, pal_old = 0;\r
 708         char fpsbuff[24]; // fps count c string\r
 709         struct timeval tval; // timing\r
 710         int thissec = 0, frames_done = 0, frames_shown = 0, oldmodes = 0;\r
 711         int target_fps, target_frametime, lim_time, vsync_offset, i;\r
 712         char *notice = 0;\r
 713 \r
 714         printf("entered emu_Loop()\n");\r
 715 \r
 716         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 717                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 718                 set_FCLK(currentConfig.CPUclock);\r
 719                 gp2x_old_clock = currentConfig.CPUclock;\r
 720                 printf(" done\n");\r
 721         }\r
 722 \r
 723         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 724                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 725                 gp2x_old_gamma = currentConfig.gamma;\r
 726                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 727         }\r
 728 \r
 729         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 730                 if (currentConfig.EmuOpt&0x2000)\r
 731                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 732                 else unset_LCD_custom_rate();\r
 733         }\r
 734 \r
 735         EmuOpt_old = currentConfig.EmuOpt;\r
 736         fpsbuff[0] = 0;\r
 737 \r
 738         // make sure we are in correct mode\r
 739         vidResetMode();\r
 740         scaling_update();\r
 741         Pico.m.dirtyPal = 1;\r
 742         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 743         find_combos();\r
 744 \r
 745         // pal/ntsc might have changed, reset related stuff\r
 746         target_fps = Pico.m.pal ? 50 : 60;\r
 747         target_frametime = 1000000/target_fps;\r
 748         reset_timing = 1;\r
 749 \r
 750         // prepare sound stuff\r
 751         if (currentConfig.EmuOpt & 4)\r
 752         {\r
 753                 int snd_excess_add;\r
 754                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 755                                 ((PicoOpt&0x200) && crashed_940)) {\r
 756                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 757                 }\r
 758                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 759                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 760                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 761                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
 762                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
 763                 PicoWriteSound = updateSound;\r
 764                 update_volume(0, 0);\r
 765                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 766                 PsndOut = sndBuffer;\r
 767                 PsndRate_old = PsndRate;\r
 768                 PicoOpt_old  = PicoOpt;\r
 769                 pal_old = Pico.m.pal;\r
 770         } else {\r
 771                 PsndOut = NULL;\r
 772         }\r
 773 \r
 774         // prepare CD buffer\r
 775         if (PicoMCD & 1) PicoCDBufferInit();\r
 776 \r
 777         // calc vsync offset to sync timing code with vsync\r
 778         if (currentConfig.EmuOpt&0x2000) {\r
 779                 gettimeofday(&tval, 0);\r
 780                 gp2x_video_wait_vsync();\r
 781                 gettimeofday(&tval, 0);\r
 782                 vsync_offset = tval.tv_usec;\r
 783                 while (vsync_offset >= target_frametime)\r
 784                         vsync_offset -= target_frametime;\r
 785                 if (!vsync_offset) vsync_offset++;\r
 786                 printf("vsync_offset: %i\n", vsync_offset);\r
 787         } else\r
 788                 vsync_offset = 0;\r
 789 \r
 790         // loop?\r
 791         while (engineState == PGS_Running)\r
 792         {\r
 793                 int modes;\r
 794 \r
 795                 gettimeofday(&tval, 0);\r
 796                 if (reset_timing) {\r
 797                         reset_timing = 0;\r
 798                         thissec = tval.tv_sec;\r
 799                         frames_shown = frames_done = tval.tv_usec/target_frametime;\r
 800                 }\r
 801 \r
 802                 // show notice message?\r
 803                 if (noticeMsgTime.tv_sec)\r
 804                 {\r
 805                         static int noticeMsgSum;\r
 806                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 807                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 808                                 clearArea(0);\r
 809                                 notice = 0;\r
 810                         } else {\r
 811                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 812                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 813                                 notice = noticeMsg;\r
 814                         }\r
 815                 }\r
 816 \r
 817                 // check for mode changes\r
 818                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 819                 if (modes != oldmodes)\r
 820                 {\r
 821                         int scalex = 320;\r
 822                         osd_fps_x = OSD_FPS_X;\r
 823                         if (modes & 4) {\r
 824                                 vidCpyM2 = vidCpyM2_40col;\r
 825                         } else {\r
 826                                 if (PicoOpt & 0x100) {\r
 827                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 828                                         scalex = 256;\r
 829                                         osd_fps_x = OSD_FPS_X - 64;\r
 830                                 } else {\r
 831                                         vidCpyM2 = vidCpyM2_32col;\r
 832                                 }\r
 833                         }\r
 834                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 835                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 836                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 837                         oldmodes = modes;\r
 838                         clearArea(1);\r
 839                 }\r
 840 \r
 841                 // second changed?\r
 842                 if (thissec != tval.tv_sec)\r
 843                 {\r
 844 #ifdef BENCHMARK\r
 845                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 846                         if (++bench == 10) {\r
 847                                 bench = 0;\r
 848                                 bench_fps_s = bench_fps;\r
 849                                 bf[bfp++ & 3] = bench_fps;\r
 850                                 bench_fps = 0;\r
 851                         }\r
 852                         bench_fps += frames_shown;\r
 853                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 854 #else\r
 855                         if (currentConfig.EmuOpt & 2)\r
 856                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 857                         if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 858 #endif\r
 859                         thissec = tval.tv_sec;\r
 860 \r
 861                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 862                                 frames_done = frames_shown = 0;\r
 863                         } else {\r
 864                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 865                                 // when second changes, but we don't want buffer to starve.\r
 866                                 if(PsndOut && frames_done < target_fps && frames_done > target_fps-5) {\r
 867                                         updateKeys();\r
 868                                         SkipFrame(1); frames_done++;\r
 869                                 }\r
 870 \r
 871                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;\r
 872                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;\r
 873                                 if (frames_shown > frames_done) frames_shown = frames_done;\r
 874                         }\r
 875                 }\r
 876 #ifdef PFRAMES\r
 877                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 878 #endif\r
 879 \r
 880                 lim_time = (frames_done+1) * target_frametime + vsync_offset;\r
 881                 if(currentConfig.Frameskip >= 0) { // frameskip enabled\r
 882                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 883                                 updateKeys();\r
 884                                 SkipFrame(1); frames_done++;\r
 885                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 886                                         gettimeofday(&tval, 0);\r
 887                                         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 888                                         if(tval.tv_usec < lim_time) { // we are too fast\r
 889                                                 simpleWait(thissec, lim_time);\r
 890                                         }\r
 891                                 }\r
 892                                 lim_time += target_frametime;\r
 893                         }\r
 894                 } else if(tval.tv_usec > lim_time) { // auto frameskip\r
 895                         // no time left for this frame - skip\r
 896                         if (tval.tv_usec - lim_time >= 300000) {\r
 897                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 898                                  * try to recover by resetting timing... */\r
 899                                 reset_timing = 1;\r
 900                                 continue;\r
 901                         }\r
 902                         updateKeys();\r
 903                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); frames_done++;\r
 904                         continue;\r
 905                 }\r
 906 \r
 907                 updateKeys();\r
 908                 PicoFrame();\r
 909 \r
 910 #if 0\r
 911 if (Pico.m.frame_count == 31563) {\r
 912         FILE *f;\r
 913         f = fopen("ram_p.bin", "wb");\r
 914         if (!f) { printf("!f\n"); exit(1); }\r
 915         fwrite(Pico.ram, 1, 0x10000, f);\r
 916         fclose(f);\r
 917         exit(0);\r
 918 }\r
 919 #endif\r
 920 #if 0\r
 921                 // debug\r
 922                 {\r
 923                         #define BYTE unsigned char\r
 924                         #define WORD unsigned short\r
 925                         struct\r
 926                         {\r
 927                                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 928                                 BYTE ColorMapType;    /* 01h  Color map type */\r
 929                                 BYTE ImageType;       /* 02h  Image type code */\r
 930                                 WORD CMapStart;       /* 03h  Color map origin */\r
 931                                 WORD CMapLength;      /* 05h  Color map length */\r
 932                                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 933                                 WORD XOffset;         /* 08h  X origin of image */\r
 934                                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 935                                 WORD Width;           /* 0Ch  Width of image */\r
 936                                 WORD Height;          /* 0Eh  Height of image */\r
 937                                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 938                                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 939                         } __attribute__((packed)) TGAHEAD;\r
 940                         static unsigned short oldscr[320*240];\r
 941                         FILE *f; char name[128]; int i;\r
 942 \r
 943                         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 944                         TGAHEAD.ImageType = 2;\r
 945                         TGAHEAD.Width = 320;\r
 946                         TGAHEAD.Height = 240;\r
 947                         TGAHEAD.PixelDepth = 16;\r
 948                         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 949 \r
 950                         #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 951 \r
 952                         for (i = 0; i < 320*240; i++)\r
 953                                 if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;\r
 954                         if (i < 320*240)\r
 955                         {\r
 956                                 for (i = 0; i < 320*240; i++)\r
 957                                         oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);\r
 958                                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 959                                 f = fopen(name, "wb");\r
 960                                 if (!f) { printf("!f\n"); exit(1); }\r
 961                                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 962                                 fwrite(oldscr, 1, 320*240*2, f);\r
 963                                 fclose(f);\r
 964                         }\r
 965                 }\r
 966 #endif\r
 967 \r
 968                 // check time\r
 969                 gettimeofday(&tval, 0);\r
 970                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 971 \r
 972                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 973                         reset_timing = 1;\r
 974                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 975                 {\r
 976                         // sleep or vsync if we are still too fast\r
 977                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 978                         if (!reset_timing && tval.tv_usec < lim_time)\r
 979                         {\r
 980                                 // we are too fast\r
 981                                 if (vsync_offset) {\r
 982                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 983                                                 simpleWait(thissec, lim_time - target_frametime/4);\r
 984                                         gp2x_video_wait_vsync();\r
 985                                 } else {\r
 986                                         simpleWait(thissec, lim_time);\r
 987                                 }\r
 988                         }\r
 989                 }\r
 990 \r
 991                 blit(fpsbuff, notice);\r
 992 \r
 993                 frames_done++; frames_shown++;\r
 994         }\r
 995 \r
 996         change_fast_forward(0);\r
 997 \r
 998         if (PicoMCD & 1) PicoCDBufferFree();\r
 999 \r
1000         // save SRAM\r
1001         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
1002                 emu_state_cb("Writing SRAM/BRAM..");\r
1003                 emu_SaveLoadGame(0, 1);\r
1004                 SRam.changed = 0;\r
1005         }\r
1006 \r
1007         // if in 8bit mode, generate 16bit image for menu background\r
1008         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
1009                 emu_forcedFrame();\r
1010 }\r
1011 \r
1012 \r
1013 void emu_ResetGame(void)\r
1014 {\r
1015         PicoReset(0);\r
1016         reset_timing = 1;\r
1017 }\r
1018 \r
1019 \r