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 DWORD noticeMsgTime = 0;
  35 static short *snd_cbuff = NULL;
  36 static int snd_cbuf_samples = 0, snd_all_samples = 0;
  37
  38
  39 static void blit(const char *fps, const char *notice);
  40 static void clearArea(int full);
  41
  42 void emu_noticeMsgUpdated(void)
  43 {
  44         noticeMsgTime = GetTickCount();
  45 }
  46
  47 void emu_getMainDir(char *dst, int len)
  48 {
  49         if (len > 0) *dst = 0;
  50 }
  51
  52 static void emu_msg_cb(const char *msg)
  53 {
  54         if (giz_screen != NULL) Framework2D_UnlockBuffer();
  55         giz_screen = Framework2D_LockBuffer(1);
  56
  57         memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
  58         emu_textOut16(4, 232, msg);
  59         noticeMsgTime = GetTickCount() - 2000;
  60
  61         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  62         reset_timing = 1;
  63
  64         Framework2D_UnlockBuffer();
  65         giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
  66 }
  67
  68 void emu_stateCb(const char *str)
  69 {
  70         if (giz_screen != NULL) Framework2D_UnlockBuffer();
  71         giz_screen = Framework2D_LockBuffer(1);
  72
  73         clearArea(0);
  74         blit("", str);
  75
  76         Framework2D_UnlockBuffer();
  77         giz_screen = NULL;
  78
  79         Sleep(0); /* yield the CPU, the system may need it */
  80 }
  81
  82 static void emu_msg_tray_open(void)
  83 {
  84         strcpy(noticeMsg, "CD tray opened");
  85         noticeMsgTime = GetTickCount();
  86 }
  87
  88
  89 void emu_Init(void)
  90 {
  91         // make dirs for saves, cfgs, etc.
  92         mkdir("mds", 0777);
  93         mkdir("srm", 0777);
  94         mkdir("brm", 0777);
  95         mkdir("cfg", 0777);
  96
  97         PicoInit();
  98         PicoMessage = emu_msg_cb;
  99         PicoMCDopenTray = emu_msg_tray_open;
 100         PicoMCDcloseTray = menu_loop_tray;
 101 }
 102
 103 void emu_Deinit(void)
 104 {
 105         // save SRAM
 106         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 107                 emu_SaveLoadGame(0, 1);
 108                 SRam.changed = 0;
 109         }
 110
 111         if (!(currentConfig.EmuOpt & 0x20))
 112                 config_writelrom(PicoConfigFile);
 113
 114         PicoExit();
 115 }
 116
 117 void emu_setDefaultConfig(void)
 118 {
 119         memset(&currentConfig, 0, sizeof(currentConfig));
 120         currentConfig.lastRomFile[0] = 0;
 121         currentConfig.EmuOpt  = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
 122         currentConfig.PicoOpt = 0x07 | 0xc00; // | cd_pcm, cd_cdda
 123         currentConfig.PsndRate = 22050;
 124         currentConfig.PicoRegion = 0; // auto
 125         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 126         currentConfig.Frameskip = -1; // auto
 127         currentConfig.volume = 50;
 128         currentConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
 129         currentConfig.KeyBinds[ 3] = 1<<1;
 130         currentConfig.KeyBinds[ 0] = 1<<2;
 131         currentConfig.KeyBinds[ 1] = 1<<3;
 132         currentConfig.KeyBinds[ 5] = 1<<4;
 133         currentConfig.KeyBinds[ 6] = 1<<5;
 134         currentConfig.KeyBinds[ 7] = 1<<6;
 135         currentConfig.KeyBinds[ 4] = 1<<7;
 136         currentConfig.KeyBinds[13] = 1<<26; // switch rend
 137         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 138         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 139         currentConfig.KeyBinds[12] = 1<<29; // vol up
 140         currentConfig.KeyBinds[11] = 1<<30; // vol down
 141         currentConfig.PicoCDBuffers = 0;
 142         currentConfig.scaling = 0;
 143 }
 144
 145
 146 static int EmuScanBegin16(unsigned int num)
 147 {
 148         if (!(Pico.video.reg[1]&8)) num += 8;
 149         DrawLineDest = (unsigned short *) giz_screen + 321 * num;
 150
 151         if ((currentConfig.EmuOpt&0x4000) && (num&1) == 0) // (Pico.m.frame_count&1))
 152                 return 1; // skip next line
 153
 154         return 0;
 155 }
 156
 157 static int EmuScanBegin8(unsigned int num)
 158 {
 159         // draw like the fast renderer
 160         if (!(Pico.video.reg[1]&8)) num += 8;
 161         HighCol = gfx_buffer + 328 * num;
 162
 163         return 0;
 164 }
 165
 166 static void osd_text(int x, int y, const char *text)
 167 {
 168         int len = strlen(text) * 8 / 2;
 169         int *p, h;
 170         for (h = 0; h < 8; h++) {
 171                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 172                 p = (int *) ((int)p & ~3); // align
 173                 memset32(p, 0, len);
 174         }
 175         emu_textOut16(x, y, text);
 176 }
 177
 178 /*
 179 void log1(void *p1, void *p2)
 180 {
 181         lprintf("%p %p %p\n", p1, p2, DrawLineDest);
 182 }
 183 */
 184
 185 static void cd_leds(void)
 186 {
 187         static int old_reg = 0;
 188         unsigned int col_g, col_r, *p;
 189
 190         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 191         old_reg = Pico_mcd->s68k_regs[0];
 192
 193         p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
 194         col_g = (old_reg & 2) ? 0x06000600 : 0;
 195         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 196         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
 197         *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
 198         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 199 }
 200
 201
 202 static short localPal[0x100];
 203
 204 static void blit(const char *fps, const char *notice)
 205 {
 206         int emu_opt = currentConfig.EmuOpt;
 207
 208         if (PicoOpt&0x10)
 209         {
 210                 int lines_flags = 224;
 211                 // 8bit fast renderer
 212                 if (Pico.m.dirtyPal) {
 213                         Pico.m.dirtyPal = 0;
 214                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 215                 }
 216                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 217                 if (currentConfig.EmuOpt&0x4000)
 218                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 219                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 220         }
 221         else if (!(emu_opt&0x80))
 222         {
 223                 int lines_flags;
 224                 // 8bit accurate renderer
 225                 if (Pico.m.dirtyPal) {
 226                         Pico.m.dirtyPal = 0;
 227                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 228                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 229                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 230                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
 231                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 232                                 localPal[0xc0] = 0x0600;
 233                                 localPal[0xd0] = 0xc000;
 234                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 235                                 localPal[0xf0] = 0xffff;
 236                         }
 237                         /* no support
 238                         else if (rendstatus & 0x20) { // mid-frame palette changes
 239                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 240                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 241                         } */
 242                 }
 243                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
 244                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 245                 if (currentConfig.EmuOpt&0x4000)
 246                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 247                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 248         }
 249
 250         if (notice || (emu_opt & 2)) {
 251                 int h = 232;
 252                 if (notice)      osd_text(4, h, notice);
 253                 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
 254         }
 255
 256         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
 257                 cd_leds();
 258 }
 259
 260 // clears whole screen or just the notice area (in all buffers)
 261 static void clearArea(int full)
 262 {
 263         if (giz_screen == NULL)
 264                 giz_screen = Framework2D_LockBuffer(1);
 265         if (full) memset32(giz_screen, 0, 320*240*2/4);
 266         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 267
 268         if (currentConfig.EmuOpt&0x8000) {
 269                 Framework2D_UnlockBuffer();
 270                 giz_screen = Framework2D_LockBuffer(0);
 271                 if (full) memset32(giz_screen, 0, 320*240*2/4);
 272                 else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 273         }
 274 }
 275
 276 static void vidResetMode(void)
 277 {
 278         giz_screen = Framework2D_LockBuffer(1);
 279
 280         if (PicoOpt&0x10) {
 281         } else if (currentConfig.EmuOpt&0x80) {
 282                 PicoDrawSetColorFormat(1);
 283                 PicoScanBegin = EmuScanBegin16;
 284         } else {
 285                 PicoDrawSetColorFormat(-1);
 286                 PicoScanBegin = EmuScanBegin8;
 287         }
 288         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 289                 // setup pal for 8-bit modes
 290                 localPal[0xc0] = 0x0600;
 291                 localPal[0xd0] = 0xc000;
 292                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 293                 localPal[0xf0] = 0xffff;
 294         }
 295         Pico.m.dirtyPal = 1;
 296
 297         memset32(giz_screen, 0, 321*240*2/4);
 298         if (currentConfig.EmuOpt&0x8000) {
 299                 Framework2D_UnlockBuffer();
 300                 giz_screen = Framework2D_LockBuffer(0);
 301                 memset32(giz_screen, 0, 321*240*2/4);
 302         }
 303         Framework2D_UnlockBuffer();
 304         giz_screen = NULL;
 305 }
 306
 307 /*
 308 #include <stdarg.h>
 309 static void stdbg(const char *fmt, ...)
 310 {
 311         static int cnt = 0;
 312         va_list vl;
 313
 314         sprintf(noticeMsg, "%x ", cnt++);
 315         va_start(vl, fmt);
 316         vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
 317         va_end(vl);
 318
 319         noticeMsgTime = GetTickCount();
 320 }
 321 */
 322
 323 static void updateSound(int len)
 324 {
 325         if (PicoOpt&8) len<<=1;
 326
 327         snd_all_samples += len;
 328         PsndOut += len;
 329         if (PsndOut - snd_cbuff >= snd_cbuf_samples)
 330         {
 331                 //if (PsndOut - snd_cbuff != snd_cbuf_samples)
 332                 //      stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
 333                 PsndOut = snd_cbuff;
 334         }
 335 }
 336
 337
 338 static void SkipFrame(void)
 339 {
 340         PicoSkipFrame=1;
 341         PicoFrame();
 342         PicoSkipFrame=0;
 343 }
 344
 345 /* forced frame to front buffer */
 346 void emu_forcedFrame(void)
 347 {
 348         int po_old = PicoOpt;
 349         int eo_old = currentConfig.EmuOpt;
 350
 351         PicoOpt &= ~0x0010;
 352         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 353         currentConfig.EmuOpt |= 0x80;
 354
 355         if (giz_screen == NULL)
 356                 giz_screen = Framework2D_LockBuffer(1);
 357
 358         PicoDrawSetColorFormat(1);
 359         PicoScanBegin = EmuScanBegin16;
 360         Pico.m.dirtyPal = 1;
 361         PicoFrameDrawOnly();
 362
 363         Framework2D_UnlockBuffer();
 364         giz_screen = NULL;
 365
 366         PicoOpt = po_old;
 367         currentConfig.EmuOpt = eo_old;
 368 }
 369
 370
 371 static void RunEvents(unsigned int which)
 372 {
 373         if (which & 0x1800) // save or load (but not both)
 374         {
 375                 int do_it = 1;
 376
 377                 if (PsndOut != NULL)
 378                         FrameworkAudio_SetPause(1);
 379                 if (giz_screen == NULL)
 380                         giz_screen = Framework2D_LockBuffer(1);
 381                 if ( emu_checkSaveFile(state_slot) &&
 382                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 383                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 384                 {
 385                         int keys;
 386                         blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
 387                         while( !((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) )
 388                                 Sleep(50);
 389                         if (keys & BTN_STOP) do_it = 0;
 390                         while(  ((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) ) // wait for release
 391                                 Sleep(50);
 392                         clearArea(0);
 393                 }
 394
 395                 if (do_it)
 396                 {
 397                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
 398                         PicoStateProgressCB = emu_stateCb;
 399                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 400                         PicoStateProgressCB = NULL;
 401                         Sleep(0);
 402                 }
 403
 404                 if (PsndOut != NULL)
 405                         FrameworkAudio_SetPause(0);
 406                 reset_timing = 1;
 407         }
 408         if (which & 0x0400) // switch renderer
 409         {
 410                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 411                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 412
 413                 vidResetMode();
 414
 415                 if (PicoOpt&0x10) {
 416                         strcpy(noticeMsg, " 8bit fast renderer");
 417                 } else if (currentConfig.EmuOpt&0x80) {
 418                         strcpy(noticeMsg, "16bit accurate renderer");
 419                 } else {
 420                         strcpy(noticeMsg, " 8bit accurate renderer");
 421                 }
 422
 423                 noticeMsgTime = GetTickCount();
 424         }
 425         if (which & 0x0300)
 426         {
 427                 if(which&0x0200) {
 428                         state_slot -= 1;
 429                         if(state_slot < 0) state_slot = 9;
 430                 } else {
 431                         state_slot += 1;
 432                         if(state_slot > 9) state_slot = 0;
 433                 }
 434                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 435                 noticeMsgTime = GetTickCount();
 436         }
 437 }
 438
 439 static void updateKeys(void)
 440 {
 441         unsigned int keys, allActions[2] = { 0, 0 }, events;
 442         static unsigned int prevEvents = 0;
 443         int i;
 444
 445         keys = Framework_PollGetButtons();
 446         if (keys & BTN_HOME)
 447                 engineState = PGS_Menu;
 448
 449         keys &= CONFIGURABLE_KEYS;
 450
 451         for (i = 0; i < 32; i++)
 452         {
 453                 if (keys & (1 << i))
 454                 {
 455                         int pl, acts = currentConfig.KeyBinds[i];
 456                         if (!acts) continue;
 457                         pl = (acts >> 16) & 1;
 458                         if (kb_combo_keys & (1 << i))
 459                         {
 460                                 int u = i+1, acts_c = acts & kb_combo_acts;
 461                                 // let's try to find the other one
 462                                 if (acts_c) {
 463                                         for (; u < 32; u++)
 464                                                 if ( (keys & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {
 465                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];
 466                                                         keys &= ~((1 << i) | (1 << u));
 467                                                         break;
 468                                                 }
 469                                 }
 470                                 // add non-combo actions if combo ones were not found
 471                                 if (!acts_c || u == 32)
 472                                         allActions[pl] |= acts & ~kb_combo_acts;
 473                         } else {
 474                                 allActions[pl] |= acts;
 475                         }
 476                 }
 477         }
 478
 479         PicoPad[0] = (unsigned short) allActions[0];
 480         PicoPad[1] = (unsigned short) allActions[1];
 481
 482         events = (allActions[0] | allActions[1]) >> 16;
 483
 484         // volume is treated in special way and triggered every frame
 485         if ((events & 0x6000) && PsndOut != NULL)
 486         {
 487                 int vol = currentConfig.volume;
 488                 if (events & 0x2000) {
 489                         if (vol < 100) vol++;
 490                 } else {
 491                         if (vol >   0) vol--;
 492                 }
 493                 FrameworkAudio_SetVolume(vol, vol);
 494                 sprintf(noticeMsg, "VOL: %02i ", vol);
 495                 noticeMsgTime = GetTickCount();
 496                 currentConfig.volume = vol;
 497         }
 498
 499         events &= ~prevEvents;
 500         if (events) RunEvents(events);
 501         if (movie_data) emu_updateMovie();
 502
 503         prevEvents = (allActions[0] | allActions[1]) >> 16;
 504 }
 505
 506
 507 static void simpleWait(DWORD until)
 508 {
 509         DWORD tval;
 510         int diff;
 511
 512         tval = GetTickCount();
 513         diff = (int)until - (int)tval;
 514         if (diff >= 2)
 515                 Sleep(diff - 1);
 516
 517         while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
 518                 spend_cycles(1024*2);
 519 }
 520
 521 void emu_Loop(void)
 522 {
 523         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 524         char fpsbuff[24]; // fps count c string
 525         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 526         int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
 527         int target_fps, target_frametime, lim_time, tval_diff, i;
 528         char *notice = NULL;
 529
 530         lprintf("entered emu_Loop()\n");
 531
 532         fpsbuff[0] = 0;
 533
 534         // make sure we are in correct mode
 535         vidResetMode();
 536         if (currentConfig.scaling) PicoOpt|=0x4000;
 537         else PicoOpt&=~0x4000;
 538         Pico.m.dirtyPal = 1;
 539         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 540         emu_findKeyBindCombos();
 541
 542         // pal/ntsc might have changed, reset related stuff
 543         target_fps = Pico.m.pal ? 50 : 60;
 544         target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
 545         reset_timing = 1;
 546
 547         // prepare CD buffer
 548         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();
 549
 550         // prepare sound stuff
 551         PsndOut = NULL;
 552         if (currentConfig.EmuOpt & 4)
 553         {
 554                 int ret, snd_excess_add, stereo;
 555                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 556                         PsndRerate(Pico.m.frame_count ? 1 : 0);
 557                 }
 558                 stereo=(PicoOpt&8)>>3;
 559                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 560                 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
 561                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 562                         PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
 563                 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
 564                 if (ret != 0) {
 565                         lprintf("FrameworkAudio_Init() failed: %i\n", ret);
 566                         sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 567                         noticeMsgTime = GetTickCount();
 568                         currentConfig.EmuOpt &= ~4;
 569                 } else {
 570                         FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
 571                         PicoWriteSound = updateSound;
 572                         snd_cbuff = FrameworkAudio_56448Buffer();
 573                         PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
 574                         snd_all_samples = 0;
 575                         PsndRate_old = PsndRate;
 576                         PicoOpt_old  = PicoOpt;
 577                         pal_old = Pico.m.pal;
 578                 }
 579         }
 580
 581         // loop?
 582         while (engineState == PGS_Running)
 583         {
 584                 int modes;
 585
 586                 tval = GetTickCount();
 587                 if (reset_timing || tval < tval_prev) {
 588                         //stdbg("timing reset");
 589                         reset_timing = 0;
 590                         tval_thissec = tval;
 591                         frames_shown = frames_done = 0;
 592                 }
 593
 594                 // show notice message?
 595                 if (noticeMsgTime) {
 596                         static int noticeMsgSum;
 597                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 598                                 noticeMsgTime = 0;
 599                                 clearArea(0);
 600                                 notice = 0;
 601                         } else {
 602                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 603                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 604                                 notice = noticeMsg;
 605                         }
 606                 }
 607
 608                 // check for mode changes
 609                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 610                 if (modes != oldmodes) {
 611                         oldmodes = modes;
 612                         clearArea(1);
 613                 }
 614
 615                 // second passed?
 616                 if (tval - tval_thissec >= sec_ms)
 617                 {
 618 #ifdef BENCHMARK
 619                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 620                         if(++bench == 10) {
 621                                 bench = 0;
 622                                 bench_fps_s = bench_fps;
 623                                 bf[bfp++ & 3] = bench_fps;
 624                                 bench_fps = 0;
 625                         }
 626                         bench_fps += frames_shown;
 627                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 628 #else
 629                         if(currentConfig.EmuOpt & 2)
 630                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 631 #endif
 632                         //tval_thissec += 1000;
 633                         tval_thissec += sec_ms;
 634
 635                         if (PsndOut != NULL)
 636                         {
 637                                 /* some code which tries to sync things to audio clock, the dirty way */
 638                                 static int audio_skew_prev = 0;
 639                                 int audio_skew, adj, co = 9, shift = 7;
 640                                 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
 641                                 if (PsndRate == 22050) co = 10;
 642                                 if (PsndRate  > 22050) co = 11;
 643                                 if (PicoOpt&8) shift++;
 644                                 if (audio_skew < 0) {
 645                                         adj = -((-audio_skew) >> shift);
 646                                         if (audio_skew > -(6<<co)) adj>>=1;
 647                                         if (audio_skew > -(4<<co)) adj>>=1;
 648                                         if (audio_skew > -(2<<co)) adj>>=1;
 649                                         if (audio_skew > audio_skew_prev) adj>>=2; // going up already
 650                                 } else {
 651                                         adj = audio_skew >> shift;
 652                                         if (audio_skew < (6<<co)) adj>>=1;
 653                                         if (audio_skew < (4<<co)) adj>>=1;
 654                                         if (audio_skew < (2<<co)) adj>>=1;
 655                                         if (audio_skew < audio_skew_prev) adj>>=2;
 656                                 }
 657                                 audio_skew_prev = audio_skew;
 658                                 target_frametime += adj;
 659                                 sec_ms = (target_frametime * target_fps) >> 8;
 660                                 //stdbg("%i %i %i", audio_skew, adj, sec_ms);
 661                                 frames_done = frames_shown = 0;
 662                         }
 663                         else if (currentConfig.Frameskip < 0) {
 664                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 665                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 666                                 if (frames_shown > frames_done) frames_shown = frames_done;
 667                         } else {
 668                                 frames_done = frames_shown = 0;
 669                         }
 670                 }
 671 #ifdef PFRAMES
 672                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 673 #endif
 674
 675                 tval_prev = tval;
 676                 lim_time = (frames_done+1) * target_frametime;
 677                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 678                 {
 679                         for (i = 0; i < currentConfig.Frameskip; i++) {
 680                                 updateKeys();
 681                                 SkipFrame(); frames_done++;
 682                                 if (PsndOut) { // do framelimitting if sound is enabled
 683                                         int tval_diff;
 684                                         tval = GetTickCount();
 685                                         tval_diff = (int)(tval - tval_thissec) << 8;
 686                                         if (tval_diff < lim_time) // we are too fast
 687                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 688                                 }
 689                                 lim_time += target_frametime;
 690                         }
 691                 }
 692                 else // auto frameskip
 693                 {
 694                         int tval_diff;
 695                         tval = GetTickCount();
 696                         tval_diff = (int)(tval - tval_thissec) << 8;
 697                         if (tval_diff > lim_time)
 698                         {
 699                                 // no time left for this frame - skip
 700                                 if (tval_diff - lim_time >= (300<<8)) {
 701                                         /* something caused a slowdown for us (disk access? cache flush?)
 702                                          * try to recover by resetting timing... */
 703                                         reset_timing = 1;
 704                                         continue;
 705                                 }
 706                                 updateKeys();
 707                                 SkipFrame(); frames_done++;
 708                                 continue;
 709                         }
 710                 }
 711
 712                 updateKeys();
 713
 714                 if (currentConfig.EmuOpt&0x80)
 715                         /* be sure correct framebuffer is locked */
 716                         giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
 717
 718                 PicoFrame();
 719
 720                 if (giz_screen == NULL)
 721                         giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
 722
 723                 blit(fpsbuff, notice);
 724
 725                 if (giz_screen != NULL) {
 726                         Framework2D_UnlockBuffer();
 727                         giz_screen = NULL;
 728                 }
 729
 730                 if (currentConfig.EmuOpt&0x2000)
 731                         Framework2D_WaitVSync();
 732
 733                 if (currentConfig.EmuOpt&0x8000)
 734                         Framework2D_Flip();
 735
 736                 // check time
 737                 tval = GetTickCount();
 738                 tval_diff = (int)(tval - tval_thissec) << 8;
 739
 740                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 741                         reset_timing = 1;
 742                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 743                 {
 744                         // sleep if we are still too fast
 745                         if (tval_diff < lim_time)
 746                         {
 747                                 // we are too fast
 748                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 749                         }
 750                 }
 751
 752                 frames_done++; frames_shown++;
 753         }
 754
 755
 756         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();
 757
 758         if (PsndOut != NULL) {
 759                 PsndOut = snd_cbuff = NULL;
 760                 FrameworkAudio_Close();
 761         }
 762
 763         // save SRAM
 764         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 765                 emu_stateCb("Writing SRAM/BRAM..");
 766                 emu_SaveLoadGame(0, 1);
 767                 SRam.changed = 0;
 768         }
 769 }
 770
 771
 772 void emu_ResetGame(void)
 773 {
 774         PicoReset();
 775         reset_timing = 1;
 776 }
 777