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 "emu.h"
  14 #include "menu.h"
  15 #include "giz.h"
  16 #include "asm_utils.h"
  17
  18 #include <Pico/PicoInt.h>
  19
  20 #ifdef BENCHMARK
  21 #define OSD_FPS_X 220
  22 #else
  23 #define OSD_FPS_X 260
  24 #endif
  25
  26 // main 300K gfx-related buffer. Used by menu and renderers.
  27 unsigned char gfx_buffer[321*240*2*2];
  28 char romFileName[MAX_PATH];
  29 int engineState;
  30
  31 unsigned char *PicoDraw2FB = gfx_buffer;  // temporary buffer for alt renderer ( (8+320)*(8+240+8) )
  32 int reset_timing = 0;
  33
  34 static int combo_keys = 0, combo_acts = 0; // keys and actions which need button combos
  35 static DWORD noticeMsgTime = 0;
  36 static short *snd_cbuff = NULL;
  37 static int snd_cbuf_samples = 0, snd_all_samples = 0;
  38
  39
  40 static void blit(const char *fps, const char *notice);
  41 static void clearArea(int full);
  42
  43 void emu_noticeMsgUpdated(void)
  44 {
  45         noticeMsgTime = GetTickCount();
  46 }
  47
  48 void emu_getMainDir(char *dst, int len)
  49 {
  50         if (len > 0) *dst = 0;
  51 }
  52
  53 static void emu_msg_cb(const char *msg)
  54 {
  55         if (giz_screen != NULL) Framework2D_UnlockBuffer();
  56         giz_screen = Framework2D_LockBuffer(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         Framework2D_UnlockBuffer();
  66         giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
  67 }
  68
  69 void emu_stateCb(const char *str)
  70 {
  71         if (giz_screen != NULL) Framework2D_UnlockBuffer();
  72         giz_screen = Framework2D_LockBuffer(1);
  73
  74         clearArea(0);
  75         blit("", str);
  76
  77         Framework2D_UnlockBuffer();
  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                 FILE *f = fopen(PicoConfigFile, "r+b");
 114                 if (!f) emu_WriteConfig(0);
 115                 else {
 116                         // if we already have config, reload it, except last ROM
 117                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 118                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 119                         fseek(f, 0, SEEK_SET);
 120                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 121                         fflush(f);
 122                         fclose(f);
 123                 }
 124         }
 125
 126         PicoExit();
 127 }
 128
 129 void emu_setDefaultConfig(void)
 130 {
 131         memset(&currentConfig, 0, sizeof(currentConfig));
 132         currentConfig.lastRomFile[0] = 0;
 133         currentConfig.EmuOpt  = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
 134         currentConfig.PicoOpt = 0x07 | 0xc00; // | cd_pcm, cd_cdda
 135         currentConfig.PsndRate = 22050;
 136         currentConfig.PicoRegion = 0; // auto
 137         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 138         currentConfig.Frameskip = -1; // auto
 139         currentConfig.volume = 50;
 140         currentConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
 141         currentConfig.KeyBinds[ 3] = 1<<1;
 142         currentConfig.KeyBinds[ 0] = 1<<2;
 143         currentConfig.KeyBinds[ 1] = 1<<3;
 144         currentConfig.KeyBinds[ 5] = 1<<4;
 145         currentConfig.KeyBinds[ 6] = 1<<5;
 146         currentConfig.KeyBinds[ 7] = 1<<6;
 147         currentConfig.KeyBinds[ 4] = 1<<7;
 148         currentConfig.KeyBinds[13] = 1<<26; // switch rend
 149         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 150         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 151         currentConfig.KeyBinds[12] = 1<<29; // vol up
 152         currentConfig.KeyBinds[11] = 1<<30; // vol down
 153         currentConfig.PicoCDBuffers = 0;
 154         currentConfig.scaling = 0;
 155 }
 156
 157
 158 static int EmuScan16(unsigned int num, void *sdata)
 159 {
 160         if (!(Pico.video.reg[1]&8)) num += 8;
 161         DrawLineDest = (unsigned short *) giz_screen + 321*(num+1);
 162
 163         if ((currentConfig.EmuOpt&0x4000) && (num&1) == 0) // (Pico.m.frame_count&1))
 164                 return 1; // skip next line
 165
 166         return 0;
 167 }
 168
 169 static int EmuScan8(unsigned int num, void *sdata)
 170 {
 171         // draw like the fast renderer
 172         if (!(Pico.video.reg[1]&8)) num += 8;
 173         HighCol = gfx_buffer + 328*(num+1);
 174
 175         return 0;
 176 }
 177
 178 static void osd_text(int x, int y, const char *text)
 179 {
 180         int len = strlen(text) * 8 / 2;
 181         int *p, h;
 182         for (h = 0; h < 8; h++) {
 183                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 184                 p = (int *) ((int)p & ~3); // align
 185                 memset32(p, 0, len);
 186         }
 187         emu_textOut16(x, y, text);
 188 }
 189
 190 /*
 191 void log1(void *p1, void *p2)
 192 {
 193         lprintf("%p %p %p\n", p1, p2, DrawLineDest);
 194 }
 195 */
 196
 197 static void cd_leds(void)
 198 {
 199         static int old_reg = 0;
 200         unsigned int col_g, col_r, *p;
 201
 202         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 203         old_reg = Pico_mcd->s68k_regs[0];
 204
 205         p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
 206         col_g = (old_reg & 2) ? 0x06000600 : 0;
 207         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 208         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
 209         *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
 210         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 211 }
 212
 213
 214 static short localPal[0x100];
 215
 216 static void blit(const char *fps, const char *notice)
 217 {
 218         int emu_opt = currentConfig.EmuOpt;
 219
 220         if (PicoOpt&0x10)
 221         {
 222                 int lines_flags = 224;
 223                 // 8bit fast renderer
 224                 if (Pico.m.dirtyPal) {
 225                         Pico.m.dirtyPal = 0;
 226                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 227                 }
 228                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 229                 if (currentConfig.EmuOpt&0x4000)
 230                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 231                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 232         }
 233         else if (!(emu_opt&0x80))
 234         {
 235                 int lines_flags;
 236                 // 8bit accurate renderer
 237                 if (Pico.m.dirtyPal) {
 238                         Pico.m.dirtyPal = 0;
 239                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 240                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 241                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 242                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
 243                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 244                                 localPal[0xc0] = 0x0600;
 245                                 localPal[0xd0] = 0xc000;
 246                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 247                                 localPal[0xf0] = 0xffff;
 248                         }
 249                         /* no support
 250                         else if (rendstatus & 0x20) { // mid-frame palette changes
 251                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 252                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 253                         } */
 254                 }
 255                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
 256                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 257                 if (currentConfig.EmuOpt&0x4000)
 258                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 259                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 260         }
 261
 262         if (notice || (emu_opt & 2)) {
 263                 int h = 232;
 264                 if (notice)      osd_text(4, h, notice);
 265                 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
 266         }
 267
 268         if ((emu_opt & 0x400) && (PicoMCD & 1))
 269                 cd_leds();
 270 }
 271
 272 // clears whole screen or just the notice area (in all buffers)
 273 static void clearArea(int full)
 274 {
 275         if (giz_screen == NULL)
 276                 giz_screen = Framework2D_LockBuffer(1);
 277         if (full) memset32(giz_screen, 0, 320*240*2/4);
 278         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 279
 280         if (currentConfig.EmuOpt&0x8000) {
 281                 Framework2D_UnlockBuffer();
 282                 giz_screen = Framework2D_LockBuffer(0);
 283                 if (full) memset32(giz_screen, 0, 320*240*2/4);
 284                 else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 285         }
 286 }
 287
 288 static void vidResetMode(void)
 289 {
 290         giz_screen = Framework2D_LockBuffer(1);
 291
 292         if (PicoOpt&0x10) {
 293         } else if (currentConfig.EmuOpt&0x80) {
 294                 PicoDrawSetColorFormat(1);
 295                 PicoScan = EmuScan16;
 296         } else {
 297                 PicoDrawSetColorFormat(-1);
 298                 PicoScan = EmuScan8;
 299         }
 300         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 301                 // setup pal for 8-bit modes
 302                 localPal[0xc0] = 0x0600;
 303                 localPal[0xd0] = 0xc000;
 304                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 305                 localPal[0xf0] = 0xffff;
 306         }
 307         Pico.m.dirtyPal = 1;
 308
 309         memset32(giz_screen, 0, 321*240*2/4);
 310         if (currentConfig.EmuOpt&0x8000) {
 311                 Framework2D_UnlockBuffer();
 312                 giz_screen = Framework2D_LockBuffer(0);
 313                 memset32(giz_screen, 0, 321*240*2/4);
 314         }
 315         Framework2D_UnlockBuffer();
 316         giz_screen = NULL;
 317 }
 318
 319 /*
 320 #include <stdarg.h>
 321 static void stdbg(const char *fmt, ...)
 322 {
 323         static int cnt = 0;
 324         va_list vl;
 325
 326         sprintf(noticeMsg, "%x ", cnt++);
 327         va_start(vl, fmt);
 328         vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
 329         va_end(vl);
 330
 331         noticeMsgTime = GetTickCount();
 332 }
 333 */
 334
 335 static void updateSound(int len)
 336 {
 337         if (PicoOpt&8) len<<=1;
 338
 339         snd_all_samples += len;
 340         PsndOut += len;
 341         if (PsndOut - snd_cbuff >= snd_cbuf_samples)
 342         {
 343                 //if (PsndOut - snd_cbuff != snd_cbuf_samples)
 344                 //      stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
 345                 PsndOut = snd_cbuff;
 346         }
 347 }
 348
 349
 350 static void SkipFrame(void)
 351 {
 352         PicoSkipFrame=1;
 353         PicoFrame();
 354         PicoSkipFrame=0;
 355 }
 356
 357 /* forced frame to front buffer */
 358 void emu_forcedFrame(void)
 359 {
 360         int po_old = PicoOpt;
 361         int eo_old = currentConfig.EmuOpt;
 362
 363         PicoOpt &= ~0x0010;
 364         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 365         currentConfig.EmuOpt |= 0x80;
 366
 367         if (giz_screen == NULL)
 368                 giz_screen = Framework2D_LockBuffer(1);
 369
 370         PicoDrawSetColorFormat(1);
 371         PicoScan = EmuScan16;
 372         PicoScan((unsigned) -1, NULL);
 373         Pico.m.dirtyPal = 1;
 374         PicoFrameDrawOnly();
 375
 376         Framework2D_UnlockBuffer();
 377         giz_screen = NULL;
 378
 379         PicoOpt = po_old;
 380         currentConfig.EmuOpt = eo_old;
 381 }
 382
 383
 384 static void RunEvents(unsigned int which)
 385 {
 386         if (which & 0x1800) // save or load (but not both)
 387         {
 388                 int do_it = 1;
 389
 390                 if (PsndOut != NULL)
 391                         FrameworkAudio_SetPause(1);
 392                 if (giz_screen == NULL)
 393                         giz_screen = Framework2D_LockBuffer(1);
 394                 if ( emu_checkSaveFile(state_slot) &&
 395                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 396                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 397                 {
 398                         int keys;
 399                         blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
 400                         while( !((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) )
 401                                 Sleep(50);
 402                         if (keys & BTN_STOP) do_it = 0;
 403                         while(  ((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) ) // wait for release
 404                                 Sleep(50);
 405                         clearArea(0);
 406                 }
 407
 408                 if (do_it)
 409                 {
 410                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
 411                         PicoStateProgressCB = emu_stateCb;
 412                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 413                         PicoStateProgressCB = NULL;
 414                         Sleep(0);
 415                 }
 416
 417                 if (PsndOut != NULL)
 418                         FrameworkAudio_SetPause(0);
 419                 reset_timing = 1;
 420         }
 421         if (which & 0x0400) // switch renderer
 422         {
 423                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 424                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 425
 426                 vidResetMode();
 427
 428                 if (PicoOpt&0x10) {
 429                         strcpy(noticeMsg, " 8bit fast renderer");
 430                 } else if (currentConfig.EmuOpt&0x80) {
 431                         strcpy(noticeMsg, "16bit accurate renderer");
 432                 } else {
 433                         strcpy(noticeMsg, " 8bit accurate renderer");
 434                 }
 435
 436                 noticeMsgTime = GetTickCount();
 437         }
 438         if (which & 0x0300)
 439         {
 440                 if(which&0x0200) {
 441                         state_slot -= 1;
 442                         if(state_slot < 0) state_slot = 9;
 443                 } else {
 444                         state_slot += 1;
 445                         if(state_slot > 9) state_slot = 0;
 446                 }
 447                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 448                 noticeMsgTime = GetTickCount();
 449         }
 450 }
 451
 452 static void updateKeys(void)
 453 {
 454         unsigned int keys, allActions[2] = { 0, 0 }, events;
 455         static unsigned int prevEvents = 0;
 456         int i;
 457
 458         keys = Framework_PollGetButtons();
 459         if (keys & BTN_HOME)
 460                 engineState = PGS_Menu;
 461
 462         keys &= CONFIGURABLE_KEYS;
 463
 464         for (i = 0; i < 32; i++)
 465         {
 466                 if (keys & (1 << i))
 467                 {
 468                         int pl, acts = currentConfig.KeyBinds[i];
 469                         if (!acts) continue;
 470                         pl = (acts >> 16) & 1;
 471                         if (combo_keys & (1 << i))
 472                         {
 473                                 int u = i+1, acts_c = acts & combo_acts;
 474                                 // let's try to find the other one
 475                                 if (acts_c)
 476                                         for (; u < 32; u++)
 477                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 478                                                         allActions[pl] |= acts_c;
 479                                                         keys &= ~((1 << i) | (1 << u));
 480                                                         break;
 481                                                 }
 482                                 // add non-combo actions if combo ones were not found
 483                                 if (!acts_c || u == 32)
 484                                         allActions[pl] |= acts & ~combo_acts;
 485                         } else {
 486                                 allActions[pl] |= acts;
 487                         }
 488                 }
 489         }
 490
 491         PicoPad[0] = (unsigned short) allActions[0];
 492         PicoPad[1] = (unsigned short) allActions[1];
 493
 494         events = (allActions[0] | allActions[1]) >> 16;
 495
 496         // volume is treated in special way and triggered every frame
 497         if ((events & 0x6000) && PsndOut != NULL)
 498         {
 499                 int vol = currentConfig.volume;
 500                 if (events & 0x2000) {
 501                         if (vol < 100) vol++;
 502                 } else {
 503                         if (vol >   0) vol--;
 504                 }
 505                 FrameworkAudio_SetVolume(vol, vol);
 506                 sprintf(noticeMsg, "VOL: %02i ", vol);
 507                 noticeMsgTime = GetTickCount();
 508                 currentConfig.volume = vol;
 509         }
 510
 511         events &= ~prevEvents;
 512         if (events) RunEvents(events);
 513         if (movie_data) emu_updateMovie();
 514
 515         prevEvents = (allActions[0] | allActions[1]) >> 16;
 516 }
 517
 518 static void find_combos(void)
 519 {
 520         int act, u;
 521
 522         // find out which keys and actions are combos
 523         combo_keys = combo_acts = 0;
 524         for (act = 0; act < 32; act++)
 525         {
 526                 int keyc = 0, keyc2 = 0;
 527                 if (act == 16 || act == 17) continue; // player2 flag
 528                 if (act > 17)
 529                 {
 530                         for (u = 0; u < 32; u++)
 531                                 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
 532                 }
 533                 else
 534                 {
 535                         for (u = 0; u < 32; u++)
 536                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 0 && // pl. 1
 537                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc++;
 538                         for (u = 0; u < 32; u++)
 539                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 1 && // pl. 2
 540                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc2++;
 541                         if (keyc2 > keyc) keyc = keyc2;
 542                 }
 543                 if (keyc > 1)
 544                 {
 545                         // loop again and mark those keys and actions as combo
 546                         for (u = 0; u < 32; u++)
 547                         {
 548                                 if (currentConfig.KeyBinds[u] & (1 << act)) {
 549                                         combo_keys |= 1 << u;
 550                                         combo_acts |= 1 << act;
 551                                 }
 552                         }
 553                 }
 554         }
 555 }
 556
 557
 558 static void simpleWait(DWORD until)
 559 {
 560         DWORD tval;
 561         int diff;
 562
 563         tval = GetTickCount();
 564         diff = (int)until - (int)tval;
 565         if (diff >= 2)
 566                 Sleep(diff - 1);
 567
 568         while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
 569                 spend_cycles(1024*2);
 570 }
 571
 572 void emu_Loop(void)
 573 {
 574         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 575         char fpsbuff[24]; // fps count c string
 576         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 577         int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
 578         int target_fps, target_frametime, lim_time, tval_diff, i;
 579         char *notice = NULL;
 580
 581         lprintf("entered emu_Loop()\n");
 582
 583         fpsbuff[0] = 0;
 584
 585         // make sure we are in correct mode
 586         vidResetMode();
 587         if (currentConfig.scaling) PicoOpt|=0x4000;
 588         else PicoOpt&=~0x4000;
 589         Pico.m.dirtyPal = 1;
 590         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 591         find_combos();
 592
 593         // pal/ntsc might have changed, reset related stuff
 594         target_fps = Pico.m.pal ? 50 : 60;
 595         target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
 596         reset_timing = 1;
 597
 598         // prepare CD buffer
 599         if (PicoMCD & 1) PicoCDBufferInit();
 600
 601         // prepare sound stuff
 602         PsndOut = NULL;
 603         if (currentConfig.EmuOpt & 4)
 604         {
 605                 int ret, snd_excess_add, stereo;
 606                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 607                         PsndRerate(Pico.m.frame_count ? 1 : 0);
 608                 }
 609                 stereo=(PicoOpt&8)>>3;
 610                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 611                 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
 612                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 613                         PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
 614                 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
 615                 if (ret != 0) {
 616                         lprintf("FrameworkAudio_Init() failed: %i\n", ret);
 617                         sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 618                         noticeMsgTime = GetTickCount();
 619                         currentConfig.EmuOpt &= ~4;
 620                 } else {
 621                         FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
 622                         PicoWriteSound = updateSound;
 623                         snd_cbuff = FrameworkAudio_56448Buffer();
 624                         PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
 625                         snd_all_samples = 0;
 626                         PsndRate_old = PsndRate;
 627                         PicoOpt_old  = PicoOpt;
 628                         pal_old = Pico.m.pal;
 629                 }
 630         }
 631
 632         // loop?
 633         while (engineState == PGS_Running)
 634         {
 635                 int modes;
 636
 637                 tval = GetTickCount();
 638                 if (reset_timing || tval < tval_prev) {
 639                         //stdbg("timing reset");
 640                         reset_timing = 0;
 641                         tval_thissec = tval;
 642                         frames_shown = frames_done = 0;
 643                 }
 644
 645                 // show notice message?
 646                 if (noticeMsgTime) {
 647                         static int noticeMsgSum;
 648                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 649                                 noticeMsgTime = 0;
 650                                 clearArea(0);
 651                                 notice = 0;
 652                         } else {
 653                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 654                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 655                                 notice = noticeMsg;
 656                         }
 657                 }
 658
 659                 // check for mode changes
 660                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 661                 if (modes != oldmodes) {
 662                         oldmodes = modes;
 663                         clearArea(1);
 664                 }
 665
 666                 // second passed?
 667                 if (tval - tval_thissec >= sec_ms)
 668                 {
 669 #ifdef BENCHMARK
 670                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 671                         if(++bench == 10) {
 672                                 bench = 0;
 673                                 bench_fps_s = bench_fps;
 674                                 bf[bfp++ & 3] = bench_fps;
 675                                 bench_fps = 0;
 676                         }
 677                         bench_fps += frames_shown;
 678                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 679 #else
 680                         if(currentConfig.EmuOpt & 2)
 681                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 682 #endif
 683                         //tval_thissec += 1000;
 684                         tval_thissec += sec_ms;
 685
 686                         if (PsndOut != NULL)
 687                         {
 688                                 /* some code which tries to sync things to audio clock, the dirty way */
 689                                 static int audio_skew_prev = 0;
 690                                 int audio_skew, adj, co = 9, shift = 7;
 691                                 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
 692                                 if (PsndRate == 22050) co = 10;
 693                                 if (PsndRate  > 22050) co = 11;
 694                                 if (PicoOpt&8) shift++;
 695                                 if (audio_skew < 0) {
 696                                         adj = -((-audio_skew) >> shift);
 697                                         if (audio_skew > -(6<<co)) adj>>=1;
 698                                         if (audio_skew > -(4<<co)) adj>>=1;
 699                                         if (audio_skew > -(2<<co)) adj>>=1;
 700                                         if (audio_skew > audio_skew_prev) adj>>=2; // going up already
 701                                 } else {
 702                                         adj = audio_skew >> shift;
 703                                         if (audio_skew < (6<<co)) adj>>=1;
 704                                         if (audio_skew < (4<<co)) adj>>=1;
 705                                         if (audio_skew < (2<<co)) adj>>=1;
 706                                         if (audio_skew < audio_skew_prev) adj>>=2;
 707                                 }
 708                                 audio_skew_prev = audio_skew;
 709                                 target_frametime += adj;
 710                                 sec_ms = (target_frametime * target_fps) >> 8;
 711                                 //stdbg("%i %i %i", audio_skew, adj, sec_ms);
 712                                 frames_done = frames_shown = 0;
 713                         }
 714                         else if (currentConfig.Frameskip < 0) {
 715                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 716                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 717                                 if (frames_shown > frames_done) frames_shown = frames_done;
 718                         } else {
 719                                 frames_done = frames_shown = 0;
 720                         }
 721                 }
 722 #ifdef PFRAMES
 723                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 724 #endif
 725
 726                 tval_prev = tval;
 727                 lim_time = (frames_done+1) * target_frametime;
 728                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 729                 {
 730                         for (i = 0; i < currentConfig.Frameskip; i++) {
 731                                 updateKeys();
 732                                 SkipFrame(); frames_done++;
 733                                 if (PsndOut) { // do framelimitting if sound is enabled
 734                                         int tval_diff;
 735                                         tval = GetTickCount();
 736                                         tval_diff = (int)(tval - tval_thissec) << 8;
 737                                         if (tval_diff < lim_time) // we are too fast
 738                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 739                                 }
 740                                 lim_time += target_frametime;
 741                         }
 742                 }
 743                 else // auto frameskip
 744                 {
 745                         int tval_diff;
 746                         tval = GetTickCount();
 747                         tval_diff = (int)(tval - tval_thissec) << 8;
 748                         if (tval_diff > lim_time)
 749                         {
 750                                 // no time left for this frame - skip
 751                                 if (tval_diff - lim_time >= (300<<8)) {
 752                                         /* something caused a slowdown for us (disk access? cache flush?)
 753                                          * try to recover by resetting timing... */
 754                                         reset_timing = 1;
 755                                         continue;
 756                                 }
 757                                 updateKeys();
 758                                 SkipFrame(); frames_done++;
 759                                 continue;
 760                         }
 761                 }
 762
 763                 updateKeys();
 764
 765                 if (currentConfig.EmuOpt&0x80)
 766                         /* be sure correct framebuffer is locked */
 767                         giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
 768
 769                 if (!(PicoOpt&0x10))
 770                         PicoScan((unsigned) -1, NULL);
 771
 772                 PicoFrame();
 773
 774                 if (giz_screen == NULL)
 775                         giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
 776
 777                 blit(fpsbuff, notice);
 778
 779                 if (giz_screen != NULL) {
 780                         Framework2D_UnlockBuffer();
 781                         giz_screen = NULL;
 782                 }
 783
 784                 if (currentConfig.EmuOpt&0x2000)
 785                         Framework2D_WaitVSync();
 786
 787                 if (currentConfig.EmuOpt&0x8000)
 788                         Framework2D_Flip();
 789
 790                 // check time
 791                 tval = GetTickCount();
 792                 tval_diff = (int)(tval - tval_thissec) << 8;
 793
 794                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 795                         reset_timing = 1;
 796                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 797                 {
 798                         // sleep if we are still too fast
 799                         if (tval_diff < lim_time)
 800                         {
 801                                 // we are too fast
 802                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 803                         }
 804                 }
 805
 806                 frames_done++; frames_shown++;
 807         }
 808
 809
 810         if (PicoMCD & 1) PicoCDBufferFree();
 811
 812         if (PsndOut != NULL) {
 813                 PsndOut = snd_cbuff = NULL;
 814                 FrameworkAudio_Close();
 815         }
 816
 817         // save SRAM
 818         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 819                 emu_stateCb("Writing SRAM/BRAM..");
 820                 emu_SaveLoadGame(0, 1);
 821                 SRam.changed = 0;
 822         }
 823 }
 824
 825
 826 void emu_ResetGame(void)
 827 {
 828         PicoReset(0);
 829         reset_timing = 1;
 830 }
 831