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