platform/gizmondo/emu.c

   1 #include <windows.h>
   2 #include <string.h>
   3
   4 #include <sys/stat.h>  // mkdir
   5 #include <sys/types.h>
   6
   7 #include "kgsdk/Framework.h"
   8 #include "kgsdk/Framework2D.h"
   9 #include "kgsdk/FrameworkAudio.h"
  10 #include "../common/emu.h"
  11 #include "../common/lprintf.h"
  12 #include "../common/arm_utils.h"
  13 #include "../common/config.h"
  14 #include "emu.h"
  15 #include "menu.h"
  16 #include "giz.h"
  17 #include "asm_utils.h"
  18
  19 #include <pico/pico_int.h>
  20
  21 #ifdef BENCHMARK
  22 #define OSD_FPS_X 220
  23 #else
  24 #define OSD_FPS_X 260
  25 #endif
  26
  27 // main 300K gfx-related buffer. Used by menu and renderers.
  28 unsigned char gfx_buffer[321*240*2*2];
  29
  30 unsigned char *PicoDraw2FB = gfx_buffer;  // temporary buffer for alt renderer ( (8+320)*(8+240+8) )
  31 int reset_timing = 0;
  32
  33 static DWORD noticeMsgTime = 0;
  34 static short *snd_cbuff = NULL;
  35 static int snd_cbuf_samples = 0, snd_all_samples = 0;
  36
  37
  38 static void blit(const char *fps, const char *notice);
  39 static void clearArea(int full);
  40
  41 void emu_noticeMsgUpdated(void)
  42 {
  43         noticeMsgTime = GetTickCount();
  44 }
  45
  46 int emu_getMainDir(char *dst, int len)
  47 {
  48         if (len > 0) *dst = 0;
  49
  50         return 0;
  51 }
  52
  53 static void emu_msg_cb(const char *msg)
  54 {
  55         if (giz_screen != NULL) fb_unlock();
  56         giz_screen = fb_lock(1);
  57
  58         memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
  59         emu_textOut16(4, 232, msg);
  60         noticeMsgTime = GetTickCount() - 2000;
  61
  62         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  63         reset_timing = 1;
  64
  65         fb_unlock();
  66         giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
  67 }
  68
  69 void emu_stateCb(const char *str)
  70 {
  71         if (giz_screen != NULL) fb_unlock();
  72         giz_screen = fb_lock(1);
  73
  74         clearArea(0);
  75         blit("", str);
  76
  77         fb_unlock();
  78         giz_screen = NULL;
  79
  80         Sleep(0); /* yield the CPU, the system may need it */
  81 }
  82
  83 static void emu_msg_tray_open(void)
  84 {
  85         strcpy(noticeMsg, "CD tray opened");
  86         noticeMsgTime = GetTickCount();
  87 }
  88
  89
  90 void emu_Init(void)
  91 {
  92         // make dirs for saves, cfgs, etc.
  93         mkdir("mds", 0777);
  94         mkdir("srm", 0777);
  95         mkdir("brm", 0777);
  96         mkdir("cfg", 0777);
  97
  98         PicoInit();
  99         PicoMessage = emu_msg_cb;
 100         PicoMCDopenTray = emu_msg_tray_open;
 101         PicoMCDcloseTray = menu_loop_tray;
 102 }
 103
 104 void emu_Deinit(void)
 105 {
 106         // save SRAM
 107         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 108                 emu_SaveLoadGame(0, 1);
 109                 SRam.changed = 0;
 110         }
 111
 112         if (!(currentConfig.EmuOpt & 0x20))
 113                 config_writelrom(PicoConfigFile);
 114
 115         PicoExit();
 116 }
 117
 118 void emu_prepareDefaultConfig(void)
 119 {
 120         memset(&defaultConfig, 0, sizeof(defaultConfig));
 121         defaultConfig.EmuOpt    = 0x1d | 0x680; // | confirm_save, cd_leds, 16bit rend
 122         defaultConfig.s_PicoOpt = 0x0f | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;
 123         defaultConfig.s_PsndRate = 22050;
 124         defaultConfig.s_PicoRegion = 0; // auto
 125         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
 126         defaultConfig.s_PicoCDBuffers = 0;
 127         defaultConfig.Frameskip = -1; // auto
 128         defaultConfig.volume = 50;
 129         defaultConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
 130         defaultConfig.KeyBinds[ 3] = 1<<1;
 131         defaultConfig.KeyBinds[ 0] = 1<<2;
 132         defaultConfig.KeyBinds[ 1] = 1<<3;
 133         defaultConfig.KeyBinds[ 5] = 1<<4;
 134         defaultConfig.KeyBinds[ 6] = 1<<5;
 135         defaultConfig.KeyBinds[ 7] = 1<<6;
 136         defaultConfig.KeyBinds[ 4] = 1<<7;
 137         defaultConfig.KeyBinds[13] = 1<<26; // switch rend
 138         defaultConfig.KeyBinds[ 8] = 1<<27; // save state
 139         defaultConfig.KeyBinds[ 9] = 1<<28; // load state
 140         defaultConfig.KeyBinds[12] = 1<<29; // vol up
 141         defaultConfig.KeyBinds[11] = 1<<30; // vol down
 142         defaultConfig.scaling = 0;
 143         defaultConfig.turbo_rate = 15;
 144 }
 145
 146
 147 static int EmuScanBegin16(unsigned int num)
 148 {
 149         if (!(Pico.video.reg[1]&8)) num += 8;
 150         DrawLineDest = (unsigned short *) giz_screen + 321 * num;
 151
 152         if ((currentConfig.EmuOpt&0x4000) && (num&1) == 0) // (Pico.m.frame_count&1))
 153                 return 1; // skip next line
 154
 155         return 0;
 156 }
 157
 158 static int EmuScanBegin8(unsigned int num)
 159 {
 160         // draw like the fast renderer
 161         if (!(Pico.video.reg[1]&8)) num += 8;
 162         HighCol = gfx_buffer + 328 * num;
 163
 164         return 0;
 165 }
 166
 167 static void osd_text(int x, int y, const char *text)
 168 {
 169         int len = strlen(text) * 8 / 2;
 170         int *p, h;
 171         for (h = 0; h < 8; h++) {
 172                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 173                 p = (int *) ((int)p & ~3); // align
 174                 memset32(p, 0, len);
 175         }
 176         emu_textOut16(x, y, text);
 177 }
 178
 179 /*
 180 void log1(void *p1, void *p2)
 181 {
 182         lprintf("%p %p %p\n", p1, p2, DrawLineDest);
 183 }
 184 */
 185
 186 static void cd_leds(void)
 187 {
 188         static int old_reg = 0;
 189         unsigned int col_g, col_r, *p;
 190
 191         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 192         old_reg = Pico_mcd->s68k_regs[0];
 193
 194         p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
 195         col_g = (old_reg & 2) ? 0x06000600 : 0;
 196         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 197         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
 198         *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
 199         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 200 }
 201
 202
 203 static short localPal[0x100];
 204
 205 static void blit(const char *fps, const char *notice)
 206 {
 207         int emu_opt = currentConfig.EmuOpt;
 208
 209         if (PicoOpt&0x10)
 210         {
 211                 int lines_flags = 224;
 212                 // 8bit fast renderer
 213                 if (Pico.m.dirtyPal) {
 214                         Pico.m.dirtyPal = 0;
 215                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 216                 }
 217                 // a hack for VR
 218                 if (PicoRead16Hook == PicoSVPRead16)
 219                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
 220                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 221                 if (currentConfig.EmuOpt&0x4000)
 222                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 223                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 224         }
 225         else if (!(emu_opt&0x80))
 226         {
 227                 int lines_flags;
 228                 // 8bit accurate renderer
 229                 if (Pico.m.dirtyPal) {
 230                         Pico.m.dirtyPal = 0;
 231                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 232                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 233                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 234                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
 235                                 memcpy32((void *)(localPal+0xc0), (void *)(localPal+0x40), 0x40*2/4);
 236                                 localPal[0xc0] = 0x0600;
 237                                 localPal[0xd0] = 0xc000;
 238                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 239                                 localPal[0xf0] = 0xffff;
 240                         }
 241                         /* no support
 242                         else if (rendstatus & 0x20) { // mid-frame palette changes
 243                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 244                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 245                         } */
 246                 }
 247                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
 248                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 249                 if (currentConfig.EmuOpt&0x4000)
 250                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 251                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 252         }
 253
 254         if (notice || (emu_opt & 2)) {
 255                 int h = 232;
 256                 if (notice)      osd_text(4, h, notice);
 257                 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
 258         }
 259
 260         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
 261                 cd_leds();
 262 }
 263
 264 // clears whole screen or just the notice area (in all buffers)
 265 static void clearArea(int full)
 266 {
 267         if (giz_screen == NULL)
 268                 giz_screen = fb_lock(1);
 269         if (full) memset32(giz_screen, 0, 320*240*2/4);
 270         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 271
 272         if (currentConfig.EmuOpt&0x8000) {
 273                 fb_unlock();
 274                 giz_screen = fb_lock(0);
 275                 if (full) memset32(giz_screen, 0, 320*240*2/4);
 276                 else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 277         }
 278 }
 279
 280 static void vidResetMode(void)
 281 {
 282         giz_screen = fb_lock(1);
 283
 284         if (PicoOpt&0x10) {
 285         } else if (currentConfig.EmuOpt&0x80) {
 286                 PicoDrawSetColorFormat(1);
 287                 PicoScanBegin = EmuScanBegin16;
 288         } else {
 289                 PicoDrawSetColorFormat(-1);
 290                 PicoScanBegin = EmuScanBegin8;
 291         }
 292         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 293                 // setup pal for 8-bit modes
 294                 localPal[0xc0] = 0x0600;
 295                 localPal[0xd0] = 0xc000;
 296                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 297                 localPal[0xf0] = 0xffff;
 298         }
 299         Pico.m.dirtyPal = 1;
 300
 301         memset32(giz_screen, 0, 321*240*2/4);
 302         if (currentConfig.EmuOpt&0x8000) {
 303                 fb_unlock();
 304                 giz_screen = fb_lock(0);
 305                 memset32(giz_screen, 0, 321*240*2/4);
 306         }
 307         fb_unlock();
 308         giz_screen = NULL;
 309 }
 310
 311 /*
 312 #include <stdarg.h>
 313 static void stdbg(const char *fmt, ...)
 314 {
 315         static int cnt = 0;
 316         va_list vl;
 317
 318         sprintf(noticeMsg, "%x ", cnt++);
 319         va_start(vl, fmt);
 320         vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
 321         va_end(vl);
 322
 323         noticeMsgTime = GetTickCount();
 324 }
 325 */
 326
 327 static void updateSound(int len)
 328 {
 329         if (PicoOpt&8) len<<=1;
 330
 331         snd_all_samples += len;
 332         PsndOut += len;
 333         if (PsndOut - snd_cbuff >= snd_cbuf_samples)
 334         {
 335                 //if (PsndOut - snd_cbuff != snd_cbuf_samples)
 336                 //      stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
 337                 PsndOut = snd_cbuff;
 338         }
 339 }
 340
 341
 342 static void SkipFrame(void)
 343 {
 344         PicoSkipFrame=1;
 345         PicoFrame();
 346         PicoSkipFrame=0;
 347 }
 348
 349 /* forced frame to front buffer */
 350 void emu_forcedFrame(int opts)
 351 {
 352         int po_old = PicoOpt;
 353         int eo_old = currentConfig.EmuOpt;
 354
 355         PicoOpt &= ~0x10;
 356         PicoOpt |= opts|POPT_ACC_SPRITES;
 357         currentConfig.EmuOpt |= 0x80;
 358
 359         if (giz_screen == NULL)
 360                 giz_screen = fb_lock(1);
 361
 362         PicoDrawSetColorFormat(1);
 363         PicoScanBegin = EmuScanBegin16;
 364         Pico.m.dirtyPal = 1;
 365         PicoFrameDrawOnly();
 366
 367         fb_unlock();
 368         giz_screen = NULL;
 369
 370         PicoOpt = po_old;
 371         currentConfig.EmuOpt = eo_old;
 372 }
 373
 374
 375 static void RunEvents(unsigned int which)
 376 {
 377         if (which & 0x1800) // save or load (but not both)
 378         {
 379                 int do_it = 1;
 380
 381                 if (PsndOut != NULL)
 382                         FrameworkAudio_SetPause(1);
 383                 if (giz_screen == NULL)
 384                         giz_screen = fb_lock(1);
 385                 if ( emu_checkSaveFile(state_slot) &&
 386                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 387                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 388                 {
 389                         int keys;
 390                         blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
 391                         while( !((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) )
 392                                 Sleep(50);
 393                         if (keys & PBTN_STOP) do_it = 0;
 394                         while(  ((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) ) // wait for release
 395                                 Sleep(50);
 396                         clearArea(0);
 397                 }
 398
 399                 if (do_it)
 400                 {
 401                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
 402                         PicoStateProgressCB = emu_stateCb;
 403                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 404                         PicoStateProgressCB = NULL;
 405                         Sleep(0);
 406                 }
 407
 408                 if (PsndOut != NULL)
 409                         FrameworkAudio_SetPause(0);
 410                 reset_timing = 1;
 411         }
 412         if (which & 0x0400) // switch renderer
 413         {
 414                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 415                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 416
 417                 vidResetMode();
 418
 419                 if (PicoOpt&0x10) {
 420                         strcpy(noticeMsg, " 8bit fast renderer");
 421                 } else if (currentConfig.EmuOpt&0x80) {
 422                         strcpy(noticeMsg, "16bit accurate renderer");
 423                 } else {
 424                         strcpy(noticeMsg, " 8bit accurate renderer");
 425                 }
 426
 427                 noticeMsgTime = GetTickCount();
 428         }
 429         if (which & 0x0300)
 430         {
 431                 if(which&0x0200) {
 432                         state_slot -= 1;
 433                         if(state_slot < 0) state_slot = 9;
 434                 } else {
 435                         state_slot += 1;
 436                         if(state_slot > 9) state_slot = 0;
 437                 }
 438                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 439                 noticeMsgTime = GetTickCount();
 440         }
 441 }
 442
 443 static void updateKeys(void)
 444 {
 445         unsigned int keys, allActions[2] = { 0, 0 }, events;
 446         static unsigned int prevEvents = 0;
 447         int i;
 448
 449         keys = Framework_PollGetButtons();
 450         if (keys & PBTN_HOME)
 451                 engineState = PGS_Menu;
 452
 453         keys &= CONFIGURABLE_KEYS;
 454
 455         for (i = 0; i < 32; i++)
 456         {
 457                 if (keys & (1 << i))
 458                 {
 459                         int pl, acts = currentConfig.KeyBinds[i];
 460                         if (!acts) continue;
 461                         pl = (acts >> 16) & 1;
 462                         if (kb_combo_keys & (1 << i))
 463                         {
 464                                 int u = i+1, acts_c = acts & kb_combo_acts;
 465                                 // let's try to find the other one
 466                                 if (acts_c) {
 467                                         for (; u < 32; u++)
 468                                                 if ( (keys & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {
 469                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];
 470                                                         keys &= ~((1 << i) | (1 << u));
 471                                                         break;
 472                                                 }
 473                                 }
 474                                 // add non-combo actions if combo ones were not found
 475                                 if (!acts_c || u == 32)
 476                                         allActions[pl] |= acts & ~kb_combo_acts;
 477                         } else {
 478                                 allActions[pl] |= acts;
 479                         }
 480                 }
 481         }
 482
 483         PicoPad[0] = allActions[0] & 0xfff;
 484         PicoPad[1] = allActions[1] & 0xfff;
 485
 486         if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);
 487         if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);
 488
 489         events = (allActions[0] | allActions[1]) >> 16;
 490
 491         // volume is treated in special way and triggered every frame
 492         if ((events & 0x6000) && PsndOut != NULL)
 493         {
 494                 int vol = currentConfig.volume;
 495                 if (events & 0x2000) {
 496                         if (vol < 100) vol++;
 497                 } else {
 498                         if (vol >   0) vol--;
 499                 }
 500                 FrameworkAudio_SetVolume(vol, vol);
 501                 sprintf(noticeMsg, "VOL: %02i ", vol);
 502                 noticeMsgTime = GetTickCount();
 503                 currentConfig.volume = vol;
 504         }
 505
 506         events &= ~prevEvents;
 507         if (events) RunEvents(events);
 508         if (movie_data) emu_updateMovie();
 509
 510         prevEvents = (allActions[0] | allActions[1]) >> 16;
 511 }
 512
 513 void emu_platformDebugCat(char *str)
 514 {
 515         // nothing
 516 }
 517
 518 static void simpleWait(DWORD until)
 519 {
 520         DWORD tval;
 521         int diff;
 522
 523         tval = GetTickCount();
 524         diff = (int)until - (int)tval;
 525         if (diff >= 2)
 526                 Sleep(diff - 1);
 527
 528         while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
 529                 spend_cycles(1024*2);
 530 }
 531
 532 void emu_Loop(void)
 533 {
 534         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 535         char fpsbuff[24]; // fps count c string
 536         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 537         int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
 538         int target_fps, target_frametime, lim_time, tval_diff, i;
 539         char *notice = NULL;
 540
 541         lprintf("entered emu_Loop()\n");
 542
 543         fpsbuff[0] = 0;
 544
 545         // make sure we are in correct mode
 546         vidResetMode();
 547         if (currentConfig.scaling) PicoOpt|=0x4000;
 548         else PicoOpt&=~0x4000;
 549         Pico.m.dirtyPal = 1;
 550         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 551         emu_findKeyBindCombos();
 552
 553         // pal/ntsc might have changed, reset related stuff
 554         target_fps = Pico.m.pal ? 50 : 60;
 555         target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
 556         reset_timing = 1;
 557
 558         // prepare CD buffer
 559         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();
 560
 561         // prepare sound stuff
 562         PsndOut = NULL;
 563         if (currentConfig.EmuOpt & 4)
 564         {
 565                 int ret, snd_excess_add, stereo;
 566                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 567                         PsndRerate(Pico.m.frame_count ? 1 : 0);
 568                 }
 569                 stereo=(PicoOpt&8)>>3;
 570                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 571                 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
 572                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 573                         PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
 574                 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
 575                 if (ret != 0) {
 576                         lprintf("FrameworkAudio_Init() failed: %i\n", ret);
 577                         sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 578                         noticeMsgTime = GetTickCount();
 579                         currentConfig.EmuOpt &= ~4;
 580                 } else {
 581                         FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
 582                         PicoWriteSound = updateSound;
 583                         snd_cbuff = FrameworkAudio_56448Buffer();
 584                         PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
 585                         snd_all_samples = 0;
 586                         PsndRate_old = PsndRate;
 587                         PicoOpt_old  = PicoOpt;
 588                         pal_old = Pico.m.pal;
 589                 }
 590         }
 591
 592         // loop?
 593         while (engineState == PGS_Running)
 594         {
 595                 int modes;
 596
 597                 tval = GetTickCount();
 598                 if (reset_timing || tval < tval_prev) {
 599                         //stdbg("timing reset");
 600                         reset_timing = 0;
 601                         tval_thissec = tval;
 602                         frames_shown = frames_done = 0;
 603                 }
 604
 605                 // show notice message?
 606                 if (noticeMsgTime) {
 607                         static int noticeMsgSum;
 608                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 609                                 noticeMsgTime = 0;
 610                                 clearArea(0);
 611                                 notice = 0;
 612                         } else {
 613                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 614                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 615                                 notice = noticeMsg;
 616                         }
 617                 }
 618
 619                 // check for mode changes
 620                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 621                 if (modes != oldmodes) {
 622                         oldmodes = modes;
 623                         clearArea(1);
 624                 }
 625
 626                 // second passed?
 627                 if (tval - tval_thissec >= sec_ms)
 628                 {
 629 #ifdef BENCHMARK
 630                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 631                         if(++bench == 10) {
 632                                 bench = 0;
 633                                 bench_fps_s = bench_fps;
 634                                 bf[bfp++ & 3] = bench_fps;
 635                                 bench_fps = 0;
 636                         }
 637                         bench_fps += frames_shown;
 638                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 639 #else
 640                         if(currentConfig.EmuOpt & 2)
 641                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 642 #endif
 643                         //tval_thissec += 1000;
 644                         tval_thissec += sec_ms;
 645
 646                         if (PsndOut != NULL)
 647                         {
 648                                 /* some code which tries to sync things to audio clock, the dirty way */
 649                                 static int audio_skew_prev = 0;
 650                                 int audio_skew, adj, co = 9, shift = 7;
 651                                 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
 652                                 if (PsndRate == 22050) co = 10;
 653                                 if (PsndRate  > 22050) co = 11;
 654                                 if (PicoOpt&8) shift++;
 655                                 if (audio_skew < 0) {
 656                                         adj = -((-audio_skew) >> shift);
 657                                         if (audio_skew > -(6<<co)) adj>>=1;
 658                                         if (audio_skew > -(4<<co)) adj>>=1;
 659                                         if (audio_skew > -(2<<co)) adj>>=1;
 660                                         if (audio_skew > audio_skew_prev) adj>>=2; // going up already
 661                                 } else {
 662                                         adj = audio_skew >> shift;
 663                                         if (audio_skew < (6<<co)) adj>>=1;
 664                                         if (audio_skew < (4<<co)) adj>>=1;
 665                                         if (audio_skew < (2<<co)) adj>>=1;
 666                                         if (audio_skew < audio_skew_prev) adj>>=2;
 667                                 }
 668                                 audio_skew_prev = audio_skew;
 669                                 target_frametime += adj;
 670                                 sec_ms = (target_frametime * target_fps) >> 8;
 671                                 //stdbg("%i %i %i", audio_skew, adj, sec_ms);
 672                                 frames_done = frames_shown = 0;
 673                         }
 674                         else if (currentConfig.Frameskip < 0) {
 675                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 676                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 677                                 if (frames_shown > frames_done) frames_shown = frames_done;
 678                         } else {
 679                                 frames_done = frames_shown = 0;
 680                         }
 681                 }
 682 #ifdef PFRAMES
 683                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 684 #endif
 685
 686                 tval_prev = tval;
 687                 lim_time = (frames_done+1) * target_frametime;
 688                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 689                 {
 690                         for (i = 0; i < currentConfig.Frameskip; i++) {
 691                                 updateKeys();
 692                                 SkipFrame(); frames_done++;
 693                                 if (PsndOut) { // do framelimitting if sound is enabled
 694                                         int tval_diff;
 695                                         tval = GetTickCount();
 696                                         tval_diff = (int)(tval - tval_thissec) << 8;
 697                                         if (tval_diff < lim_time) // we are too fast
 698                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 699                                 }
 700                                 lim_time += target_frametime;
 701                         }
 702                 }
 703                 else // auto frameskip
 704                 {
 705                         int tval_diff;
 706                         tval = GetTickCount();
 707                         tval_diff = (int)(tval - tval_thissec) << 8;
 708                         if (tval_diff > lim_time)
 709                         {
 710                                 // no time left for this frame - skip
 711                                 if (tval_diff - lim_time >= (300<<8)) {
 712                                         /* something caused a slowdown for us (disk access? cache flush?)
 713                                          * try to recover by resetting timing... */
 714                                         reset_timing = 1;
 715                                         continue;
 716                                 }
 717                                 updateKeys();
 718                                 SkipFrame(); frames_done++;
 719                                 continue;
 720                         }
 721                 }
 722
 723                 updateKeys();
 724
 725                 if (currentConfig.EmuOpt&0x80)
 726                         /* be sure correct framebuffer is locked */
 727                         giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
 728
 729                 PicoFrame();
 730
 731                 if (giz_screen == NULL)
 732                         giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
 733
 734                 blit(fpsbuff, notice);
 735
 736                 if (giz_screen != NULL) {
 737                         fb_unlock();
 738                         giz_screen = NULL;
 739                 }
 740
 741                 if (currentConfig.EmuOpt&0x2000)
 742                         Framework2D_WaitVSync();
 743
 744                 if (currentConfig.EmuOpt&0x8000)
 745                         fb_flip();
 746
 747                 // check time
 748                 tval = GetTickCount();
 749                 tval_diff = (int)(tval - tval_thissec) << 8;
 750
 751                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 752                         reset_timing = 1;
 753                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 754                 {
 755                         // sleep if we are still too fast
 756                         if (tval_diff < lim_time)
 757                         {
 758                                 // we are too fast
 759                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 760                         }
 761                 }
 762
 763                 frames_done++; frames_shown++;
 764         }
 765
 766
 767         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();
 768
 769         if (PsndOut != NULL) {
 770                 PsndOut = snd_cbuff = NULL;
 771                 FrameworkAudio_Close();
 772         }
 773
 774         // save SRAM
 775         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 776                 emu_stateCb("Writing SRAM/BRAM..");
 777                 emu_SaveLoadGame(0, 1);
 778                 SRam.changed = 0;
 779         }
 780 }
 781
 782
 783 void emu_ResetGame(void)
 784 {
 785         PicoReset();
 786         reset_timing = 1;
 787 }
 788