platform/psp/emu.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3 #include <sys/syslimits.h> // PATH_MAX
   4
   5 #include <pspthreadman.h>
   6
   7 #include "psp.h"
   8 #include "menu.h"
   9 #include "emu.h"
  10 #include "../common/emu.h"
  11 #include "../common/lprintf.h"
  12 #include "../../Pico/PicoInt.h"
  13
  14 #ifdef BENCHMARK
  15 #define OSD_FPS_X 220
  16 #else
  17 #define OSD_FPS_X 260
  18 #endif
  19
  20 // vram usage map:
  21 // 000000-044000 fb0
  22 // 044000-088000 fb1
  23 // 088000-0ae000 texture0
  24 // 0ae000-0d4000 texture1
  25
  26 char romFileName[PATH_MAX];
  27 static unsigned char picoD2FB[(8+320)*(8+240+8)];
  28 unsigned char *PicoDraw2FB = picoD2FB;  // temporary buffer for alt renderer ( (8+320)*(8+240+8) )
  29 int engineState;
  30
  31 static int combo_keys = 0, combo_acts = 0; // keys and actions which need button combos
  32 static unsigned int noticeMsgTime = 0;
  33 int reset_timing = 0; // do we need this?
  34
  35
  36 static void blit(const char *fps, const char *notice);
  37 static void clearArea(int full);
  38
  39 void emu_noticeMsgUpdated(void)
  40 {
  41         noticeMsgTime = sceKernelGetSystemTimeLow();
  42 }
  43
  44 void emu_getMainDir(char *dst, int len)
  45 {
  46         if (len > 0) *dst = 0;
  47 }
  48
  49 static void emu_msg_cb(const char *msg)
  50 {
  51         void *fb = psp_video_get_active_fb();
  52
  53         memset32((int *)((char *)fb + 512*264*2), 0, 512*8*2/4);
  54         emu_textOut16(4, 264, msg);
  55         noticeMsgTime = sceKernelGetSystemTimeLow() - 2000000;
  56
  57         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  58         reset_timing = 1;
  59 }
  60
  61 void emu_stateCb(const char *str)
  62 {
  63         clearArea(0);
  64         blit("", str);
  65 }
  66
  67 static void emu_msg_tray_open(void)
  68 {
  69         strcpy(noticeMsg, "CD tray opened");
  70         noticeMsgTime = sceKernelGetSystemTimeLow();
  71 }
  72
  73
  74 void emu_Init(void)
  75 {
  76         // make dirs for saves, cfgs, etc.
  77         mkdir("mds", 0777);
  78         mkdir("srm", 0777);
  79         mkdir("brm", 0777);
  80         mkdir("cfg", 0777);
  81
  82         PicoInit();
  83         PicoMessage = emu_msg_cb;
  84         PicoMCDopenTray = emu_msg_tray_open;
  85         PicoMCDcloseTray = menu_loop_tray;
  86 }
  87
  88 void emu_Deinit(void)
  89 {
  90         // save SRAM
  91         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
  92                 emu_SaveLoadGame(0, 1);
  93                 SRam.changed = 0;
  94         }
  95
  96         if (!(currentConfig.EmuOpt & 0x20)) {
  97                 FILE *f = fopen(PicoConfigFile, "r+b");
  98                 if (!f) emu_WriteConfig(0);
  99                 else {
 100                         // if we already have config, reload it, except last ROM
 101                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 102                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 103                         fseek(f, 0, SEEK_SET);
 104                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 105                         fflush(f);
 106                         fclose(f);
 107                 }
 108         }
 109
 110         PicoExit();
 111 }
 112
 113 void emu_setDefaultConfig(void)
 114 {
 115         memset(&currentConfig, 0, sizeof(currentConfig));
 116         currentConfig.lastRomFile[0] = 0;
 117         currentConfig.EmuOpt  = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
 118         currentConfig.PicoOpt = 0x07 | 0xc00; // | cd_pcm, cd_cdda
 119         currentConfig.PsndRate = 22050;
 120         currentConfig.PicoRegion = 0; // auto
 121         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 122         currentConfig.Frameskip = -1; // auto
 123         currentConfig.volume = 50;
 124         currentConfig.KeyBinds[ 4] = 1<<0; // SACB RLDU
 125         currentConfig.KeyBinds[ 6] = 1<<1;
 126         currentConfig.KeyBinds[ 7] = 1<<2;
 127         currentConfig.KeyBinds[ 5] = 1<<3;
 128         currentConfig.KeyBinds[14] = 1<<4;
 129         currentConfig.KeyBinds[13] = 1<<5;
 130         currentConfig.KeyBinds[15] = 1<<6;
 131         currentConfig.KeyBinds[ 3] = 1<<7;
 132         currentConfig.KeyBinds[23] = 1<<26; // switch rend
 133         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 134         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 135         currentConfig.PicoCDBuffers = 0;
 136         currentConfig.scaling = 0;
 137 }
 138
 139
 140 static int EmuScan16(unsigned int num, void *sdata)
 141 {
 142         if (!(Pico.video.reg[1]&8)) num += 8;
 143         DrawLineDest = (unsigned short *) psp_screen + 512*(num+1);
 144
 145         return 0;
 146 }
 147
 148 static int EmuScan8(unsigned int num, void *sdata)
 149 {
 150         // draw like the fast renderer
 151         // TODO?
 152         //if (!(Pico.video.reg[1]&8)) num += 8;
 153         //HighCol = gfx_buffer + 328*(num+1);
 154
 155         return 0;
 156 }
 157
 158 static void osd_text(int x, const char *text)
 159 {
 160         int len = strlen(text) * 8 / 2;
 161         int *p, h;
 162         for (h = 0; h < 8; h++) {
 163                 p = (int *) ((unsigned short *) psp_screen+x+512*(264+h));
 164                 p = (int *) ((int)p & ~3); // align
 165                 memset32(p, 0, len);
 166         }
 167         emu_textOut16(x, 264, text);
 168 }
 169
 170
 171 static void cd_leds(void)
 172 {
 173         static int old_reg = 0;
 174         unsigned int col_g, col_r, *p;
 175
 176         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 177         old_reg = Pico_mcd->s68k_regs[0];
 178
 179         p = (unsigned int *)((short *)psp_screen + 512*2+4+2);
 180         col_g = (old_reg & 2) ? 0x06000600 : 0;
 181         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 182         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 183         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 184         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 185 }
 186
 187
 188 static short localPal[0x100];
 189
 190 static void blit(const char *fps, const char *notice)
 191 {
 192         int emu_opt = currentConfig.EmuOpt;
 193
 194 #if 0
 195         if (PicoOpt&0x10)
 196         {
 197                 int lines_flags = 224;
 198                 // 8bit fast renderer
 199                 if (Pico.m.dirtyPal) {
 200                         Pico.m.dirtyPal = 0;
 201                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 202                 }
 203                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 204                 if (currentConfig.EmuOpt&0x4000)
 205                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 206                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 207         }
 208         else if (!(emu_opt&0x80))
 209         {
 210                 int lines_flags;
 211                 // 8bit accurate renderer
 212                 if (Pico.m.dirtyPal) {
 213                         Pico.m.dirtyPal = 0;
 214                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 215                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 216                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 217                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
 218                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 219                                 localPal[0xc0] = 0x0600;
 220                                 localPal[0xd0] = 0xc000;
 221                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 222                                 localPal[0xf0] = 0xffff;
 223                         }
 224                         /* no support
 225                         else if (rendstatus & 0x20) { // mid-frame palette changes
 226                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 227                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 228                         } */
 229                 }
 230                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
 231                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 232                 if (currentConfig.EmuOpt&0x4000)
 233                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
 234                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 235         }
 236 #endif
 237
 238         if (notice || (emu_opt & 2)) {
 239                 if (notice)      osd_text(4, notice);
 240                 if (emu_opt & 2) osd_text(OSD_FPS_X, fps);
 241         }
 242
 243         if ((emu_opt & 0x400) && (PicoMCD & 1))
 244                 cd_leds();
 245
 246         psp_video_flip(0);
 247 }
 248
 249 // clears whole screen or just the notice area (in all buffers)
 250 static void clearArea(int full)
 251 {
 252         if (full) {
 253                 memset32(psp_screen, 0, 512*272*2/4);
 254                 psp_video_flip(0);
 255                 memset32(psp_screen, 0, 512*272*2/4);
 256         } else {
 257                 void *fb = psp_video_get_active_fb();
 258                 memset32((int *)((char *)psp_screen + 512*264*2), 0, 512*8*2/4);
 259                 memset32((int *)((char *)fb         + 512*264*2), 0, 512*8*2/4);
 260         }
 261 }
 262
 263 static void vidResetMode(void)
 264 {
 265         if (PicoOpt&0x10) {
 266         } else if (currentConfig.EmuOpt&0x80) {
 267                 PicoDrawSetColorFormat(1);
 268                 PicoScan = EmuScan16;
 269         } else {
 270                 PicoDrawSetColorFormat(-1);
 271                 PicoScan = EmuScan8;
 272         }
 273         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 274                 // setup pal for 8-bit modes
 275                 localPal[0xc0] = 0x0600;
 276                 localPal[0xd0] = 0xc000;
 277                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 278                 localPal[0xf0] = 0xffff;
 279         }
 280         Pico.m.dirtyPal = 1;
 281
 282         clearArea(1);
 283 }
 284
 285 static void updateSound(int len)
 286 {
 287         if (PicoOpt&8) len<<=1;
 288
 289         // TODO..
 290 }
 291
 292
 293 static void SkipFrame(void)
 294 {
 295         PicoSkipFrame=1;
 296         PicoFrame();
 297         PicoSkipFrame=0;
 298 }
 299
 300 void emu_forcedFrame(void)
 301 {
 302         int po_old = PicoOpt;
 303         int eo_old = currentConfig.EmuOpt;
 304
 305         PicoOpt &= ~0x0010;
 306         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 307         currentConfig.EmuOpt |= 0x80;
 308
 309         PicoDrawSetColorFormat(1);
 310         PicoScan = EmuScan16;
 311         PicoScan((unsigned) -1, NULL);
 312         Pico.m.dirtyPal = 1;
 313         PicoFrameDrawOnly();
 314
 315         PicoOpt = po_old;
 316         currentConfig.EmuOpt = eo_old;
 317 }
 318
 319
 320 static void RunEvents(unsigned int which)
 321 {
 322         if (which & 0x1800) // save or load (but not both)
 323         {
 324                 int do_it = 1;
 325
 326                 if ( emu_checkSaveFile(state_slot) &&
 327                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 328                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 329                 {
 330                         int keys;
 331                         blit("", (which & 0x1000) ? "LOAD STATE? (X=yes, O=no)" : "OVERWRITE SAVE? (X=yes, O=no)");
 332                         while( !((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) )
 333                                 psp_msleep(50);
 334                         if (keys & BTN_CIRCLE) do_it = 0;
 335                         while(  ((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) ) // wait for release
 336                                 psp_msleep(50);
 337                         clearArea(0);
 338                 }
 339
 340                 if (do_it)
 341                 {
 342                         osd_text(4, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
 343                         PicoStateProgressCB = emu_stateCb;
 344                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 345                         PicoStateProgressCB = NULL;
 346                         psp_msleep(0);
 347                 }
 348
 349                 reset_timing = 1;
 350         }
 351         if (which & 0x0400) // switch renderer
 352         {
 353                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 354                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 355
 356                 vidResetMode();
 357
 358                 if (PicoOpt&0x10) {
 359                         strcpy(noticeMsg, " 8bit fast renderer");
 360                 } else if (currentConfig.EmuOpt&0x80) {
 361                         strcpy(noticeMsg, "16bit accurate renderer");
 362                 } else {
 363                         strcpy(noticeMsg, " 8bit accurate renderer");
 364                 }
 365
 366                 noticeMsgTime = sceKernelGetSystemTimeLow();
 367         }
 368         if (which & 0x0300)
 369         {
 370                 if(which&0x0200) {
 371                         state_slot -= 1;
 372                         if(state_slot < 0) state_slot = 9;
 373                 } else {
 374                         state_slot += 1;
 375                         if(state_slot > 9) state_slot = 0;
 376                 }
 377                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 378                 noticeMsgTime = sceKernelGetSystemTimeLow();
 379         }
 380 }
 381
 382 static void updateKeys(void)
 383 {
 384         unsigned int keys, allActions[2] = { 0, 0 }, events;
 385         static unsigned int prevEvents = 0;
 386         int i;
 387
 388         keys = psp_pad_read(0);
 389         if (keys & BTN_SELECT)
 390                 engineState = PGS_Menu;
 391
 392         keys &= CONFIGURABLE_KEYS;
 393
 394         for (i = 0; i < 32; i++)
 395         {
 396                 if (keys & (1 << i))
 397                 {
 398                         int pl, acts = currentConfig.KeyBinds[i];
 399                         if (!acts) continue;
 400                         pl = (acts >> 16) & 1;
 401                         if (combo_keys & (1 << i))
 402                         {
 403                                 int u = i+1, acts_c = acts & combo_acts;
 404                                 // let's try to find the other one
 405                                 if (acts_c)
 406                                         for (; u < 32; u++)
 407                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 408                                                         allActions[pl] |= acts_c;
 409                                                         keys &= ~((1 << i) | (1 << u));
 410                                                         break;
 411                                                 }
 412                                 // add non-combo actions if combo ones were not found
 413                                 if (!acts_c || u == 32)
 414                                         allActions[pl] |= acts & ~combo_acts;
 415                         } else {
 416                                 allActions[pl] |= acts;
 417                         }
 418                 }
 419         }
 420
 421         PicoPad[0] = (unsigned short) allActions[0];
 422         PicoPad[1] = (unsigned short) allActions[1];
 423
 424         events = (allActions[0] | allActions[1]) >> 16;
 425
 426         // volume is treated in special way and triggered every frame
 427         if ((events & 0x6000) && PsndOut != NULL)
 428         {
 429                 int vol = currentConfig.volume;
 430                 if (events & 0x2000) {
 431                         if (vol < 100) vol++;
 432                 } else {
 433                         if (vol >   0) vol--;
 434                 }
 435                 // FrameworkAudio_SetVolume(vol, vol); // TODO
 436                 sprintf(noticeMsg, "VOL: %02i ", vol);
 437                 noticeMsgTime = sceKernelGetSystemTimeLow();
 438                 currentConfig.volume = vol;
 439         }
 440
 441         events &= ~prevEvents;
 442         if (events) RunEvents(events);
 443         if (movie_data) emu_updateMovie();
 444
 445         prevEvents = (allActions[0] | allActions[1]) >> 16;
 446 }
 447
 448 static void find_combos(void)
 449 {
 450         int act, u;
 451
 452         // find out which keys and actions are combos
 453         combo_keys = combo_acts = 0;
 454         for (act = 0; act < 32; act++)
 455         {
 456                 int keyc = 0;
 457                 if (act == 16 || act == 17) continue; // player2 flag
 458                 for (u = 0; u < 32; u++)
 459                 {
 460                         if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
 461                 }
 462                 if (keyc > 1)
 463                 {
 464                         // loop again and mark those keys and actions as combo
 465                         for (u = 0; u < 32; u++)
 466                         {
 467                                 if (currentConfig.KeyBinds[u] & (1 << act)) {
 468                                         combo_keys |= 1 << u;
 469                                         combo_acts |= 1 << act;
 470                                 }
 471                         }
 472                 }
 473         }
 474 }
 475
 476
 477 static void simpleWait(unsigned int until)
 478 {
 479         unsigned int tval;
 480         int diff;
 481
 482         tval = sceKernelGetSystemTimeLow();
 483         diff = (int)until - (int)tval;
 484         if (diff >= 512 && diff < 100*1024)
 485                 sceKernelDelayThread(diff);
 486 }
 487
 488 void emu_Loop(void)
 489 {
 490         //static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 491         char fpsbuff[24]; // fps count c string
 492         unsigned int tval, tval_prev = 0, tval_thissec = 0; // timing
 493         int frames_done = 0, frames_shown = 0, oldmodes = 0;
 494         int target_fps, target_frametime, lim_time, tval_diff, i;
 495         char *notice = NULL;
 496
 497         lprintf("entered emu_Loop()\n");
 498
 499         fpsbuff[0] = 0;
 500
 501         // make sure we are in correct mode
 502         vidResetMode();
 503         Pico.m.dirtyPal = 1;
 504         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 505         find_combos();
 506
 507         // pal/ntsc might have changed, reset related stuff
 508         target_fps = Pico.m.pal ? 50 : 60;
 509         target_frametime = Pico.m.pal ? (1000000<<8)/50 : (1000000<<8)/60+1;
 510         reset_timing = 1;
 511
 512         // prepare CD buffer
 513         if (PicoMCD & 1) PicoCDBufferInit();
 514
 515         // prepare sound stuff
 516         PsndOut = NULL;
 517 #if 0 // TODO
 518         if (currentConfig.EmuOpt & 4)
 519         {
 520                 int ret, snd_excess_add, stereo;
 521                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 522                         sound_rerate(Pico.m.frame_count ? 1 : 0);
 523                 }
 524                 stereo=(PicoOpt&8)>>3;
 525                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 526                 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
 527                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 528                         PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
 529                 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
 530                 if (ret != 0) {
 531                         lprintf("FrameworkAudio_Init() failed: %i\n", ret);
 532                         sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 533                         noticeMsgTime = sceKernelGetSystemTimeLow();
 534                         currentConfig.EmuOpt &= ~4;
 535                 } else {
 536                         FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
 537                         PicoWriteSound = updateSound;
 538                         snd_cbuff = FrameworkAudio_56448Buffer();
 539                         PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
 540                         snd_all_samples = 0;
 541                         PsndRate_old = PsndRate;
 542                         PicoOpt_old  = PicoOpt;
 543                         pal_old = Pico.m.pal;
 544                 }
 545         }
 546 #endif
 547
 548         // loop?
 549         while (engineState == PGS_Running)
 550         {
 551                 int modes;
 552
 553                 tval = sceKernelGetSystemTimeLow();
 554                 if (reset_timing || tval < tval_prev) {
 555                         //stdbg("timing reset");
 556                         reset_timing = 0;
 557                         tval_thissec = tval;
 558                         frames_shown = frames_done = 0;
 559                 }
 560
 561                 // show notice message?
 562                 if (noticeMsgTime) {
 563                         static int noticeMsgSum;
 564                         if (tval - noticeMsgTime > 2000000) { // > 2.0 sec
 565                                 noticeMsgTime = 0;
 566                                 clearArea(0);
 567                                 notice = 0;
 568                         } else {
 569                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 570                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 571                                 notice = noticeMsg;
 572                         }
 573                 }
 574
 575                 // check for mode changes
 576                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 577                 if (modes != oldmodes) {
 578                         oldmodes = modes;
 579                         clearArea(1);
 580                 }
 581
 582                 // second passed?
 583                 if (tval - tval_thissec >= 1000000)
 584                 {
 585 #ifdef BENCHMARK
 586                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 587                         if(++bench == 10) {
 588                                 bench = 0;
 589                                 bench_fps_s = bench_fps;
 590                                 bf[bfp++ & 3] = bench_fps;
 591                                 bench_fps = 0;
 592                         }
 593                         bench_fps += frames_shown;
 594                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 595 #else
 596                         if(currentConfig.EmuOpt & 2)
 597                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 598 #endif
 599                         tval_thissec += 1000000;
 600
 601                         if (currentConfig.Frameskip < 0) {
 602                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 603                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 604                                 if (frames_shown > frames_done) frames_shown = frames_done;
 605                         } else {
 606                                 frames_done = frames_shown = 0;
 607                         }
 608                 }
 609 #ifdef PFRAMES
 610                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 611 #endif
 612
 613                 tval_prev = tval;
 614                 lim_time = (frames_done+1) * target_frametime;
 615                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 616                 {
 617                         for (i = 0; i < currentConfig.Frameskip; i++) {
 618                                 updateKeys();
 619                                 SkipFrame(); frames_done++;
 620                                 if (PsndOut) { // do framelimitting if sound is enabled
 621                                         int tval_diff;
 622                                         tval = sceKernelGetSystemTimeLow();
 623                                         tval_diff = (int)(tval - tval_thissec) << 8;
 624                                         if (tval_diff < lim_time) // we are too fast
 625                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 626                                 }
 627                                 lim_time += target_frametime;
 628                         }
 629                 }
 630                 else // auto frameskip
 631                 {
 632                         int tval_diff;
 633                         tval = sceKernelGetSystemTimeLow();
 634                         tval_diff = (int)(tval - tval_thissec) << 8;
 635                         if (tval_diff > lim_time)
 636                         {
 637                                 // no time left for this frame - skip
 638                                 if (tval_diff - lim_time >= (300000<<8)) {
 639                                         /* something caused a slowdown for us (disk access? cache flush?)
 640                                          * try to recover by resetting timing... */
 641                                         reset_timing = 1;
 642                                         continue;
 643                                 }
 644                                 updateKeys();
 645                                 SkipFrame(); frames_done++;
 646                                 continue;
 647                         }
 648                 }
 649
 650                 updateKeys();
 651
 652                 if (!(PicoOpt&0x10))
 653                         PicoScan((unsigned) -1, NULL);
 654
 655                 PicoFrame();
 656
 657                 blit(fpsbuff, notice);
 658
 659                 // check time
 660                 tval = sceKernelGetSystemTimeLow();
 661                 tval_diff = (int)(tval - tval_thissec) << 8;
 662
 663                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300000<<8)) // slowdown detection
 664                         reset_timing = 1;
 665                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 666                 {
 667                         // sleep if we are still too fast
 668                         if (tval_diff < lim_time)
 669                         {
 670                                 // we are too fast
 671                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 672                         }
 673                 }
 674
 675                 frames_done++; frames_shown++;
 676         }
 677
 678
 679         if (PicoMCD & 1) PicoCDBufferFree();
 680 /*
 681         if (PsndOut != NULL) {
 682                 PsndOut = snd_cbuff = NULL;
 683                 FrameworkAudio_Close();
 684         }
 685 */
 686         // save SRAM
 687         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 688                 emu_stateCb("Writing SRAM/BRAM..");
 689                 emu_SaveLoadGame(0, 1);
 690                 SRam.changed = 0;
 691         }
 692 }
 693
 694
 695 void emu_ResetGame(void)
 696 {
 697         PicoReset(0);
 698         reset_timing = 1;
 699 }
 700