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