improve linux makefile
[picodrive.git] / 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 emu_noticeMsgUpdated(void)
42 {
43         noticeMsgTime = GetTickCount();
44 }
45
46 int emu_getMainDir(char *dst, int len)
47 {
48         if (len > 0) *dst = 0;
49
50         return 0;
51 }
52
53 static void emu_msg_cb(const char *msg)
54 {
55         if (giz_screen != NULL) fb_unlock();
56         giz_screen = fb_lock(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         fb_unlock();
66         giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
67 }
68
69 void emu_stateCb(const char *str)
70 {
71         if (giz_screen != NULL) fb_unlock();
72         giz_screen = fb_lock(1);
73
74         clearArea(0);
75         blit("", str);
76
77         fb_unlock();
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_prepareDefaultConfig(void)
119 {
120         memset(&defaultConfig, 0, sizeof(defaultConfig));
121         defaultConfig.EmuOpt    = 0x1d | 0x680; // | confirm_save, cd_leds, 16bit rend
122         defaultConfig.s_PicoOpt = 0x0f | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;
123         defaultConfig.s_PsndRate = 22050;
124         defaultConfig.s_PicoRegion = 0; // auto
125         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
126         defaultConfig.s_PicoCDBuffers = 0;
127         defaultConfig.Frameskip = -1; // auto
128         defaultConfig.volume = 50;
129         defaultConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
130         defaultConfig.KeyBinds[ 3] = 1<<1;
131         defaultConfig.KeyBinds[ 0] = 1<<2;
132         defaultConfig.KeyBinds[ 1] = 1<<3;
133         defaultConfig.KeyBinds[ 5] = 1<<4;
134         defaultConfig.KeyBinds[ 6] = 1<<5;
135         defaultConfig.KeyBinds[ 7] = 1<<6;
136         defaultConfig.KeyBinds[ 4] = 1<<7;
137         defaultConfig.KeyBinds[13] = 1<<26; // switch rend
138         defaultConfig.KeyBinds[ 8] = 1<<27; // save state
139         defaultConfig.KeyBinds[ 9] = 1<<28; // load state
140         defaultConfig.KeyBinds[12] = 1<<29; // vol up
141         defaultConfig.KeyBinds[11] = 1<<30; // vol down
142         defaultConfig.scaling = 0;
143         defaultConfig.turbo_rate = 15;
144 }
145
146
147 static int EmuScanBegin16(unsigned int num)
148 {
149         if (!(Pico.video.reg[1]&8)) num += 8;
150         DrawLineDest = (unsigned short *) giz_screen + 321 * num;
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 EmuScanBegin8(unsigned int num)
159 {
160         // draw like the fast renderer
161         if (!(Pico.video.reg[1]&8)) num += 8;
162         HighCol = gfx_buffer + 328 * num;
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                 // a hack for VR
218                 if (PicoRead16Hook == PicoSVPRead16)
219                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
220                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
221                 if (currentConfig.EmuOpt&0x4000)
222                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
223                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
224         }
225         else if (!(emu_opt&0x80))
226         {
227                 int lines_flags;
228                 // 8bit accurate renderer
229                 if (Pico.m.dirtyPal) {
230                         Pico.m.dirtyPal = 0;
231                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
232                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
233                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
234                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
235                                 memcpy32((void *)(localPal+0xc0), (void *)(localPal+0x40), 0x40*2/4);
236                                 localPal[0xc0] = 0x0600;
237                                 localPal[0xd0] = 0xc000;
238                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
239                                 localPal[0xf0] = 0xffff;
240                         }
241                         /* no support
242                         else if (rendstatus & 0x20) { // mid-frame palette changes
243                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
244                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
245                         } */
246                 }
247                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
248                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
249                 if (currentConfig.EmuOpt&0x4000)
250                         lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
251                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
252         }
253
254         if (notice || (emu_opt & 2)) {
255                 int h = 232;
256                 if (notice)      osd_text(4, h, notice);
257                 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
258         }
259
260         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
261                 cd_leds();
262 }
263
264 // clears whole screen or just the notice area (in all buffers)
265 static void clearArea(int full)
266 {
267         if (giz_screen == NULL)
268                 giz_screen = fb_lock(1);
269         if (full) memset32(giz_screen, 0, 320*240*2/4);
270         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
271
272         if (currentConfig.EmuOpt&0x8000) {
273                 fb_unlock();
274                 giz_screen = fb_lock(0);
275                 if (full) memset32(giz_screen, 0, 320*240*2/4);
276                 else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
277         }
278 }
279
280 static void vidResetMode(void)
281 {
282         giz_screen = fb_lock(1);
283
284         if (PicoOpt&0x10) {
285         } else if (currentConfig.EmuOpt&0x80) {
286                 PicoDrawSetColorFormat(1);
287                 PicoScanBegin = EmuScanBegin16;
288         } else {
289                 PicoDrawSetColorFormat(-1);
290                 PicoScanBegin = EmuScanBegin8;
291         }
292         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
293                 // setup pal for 8-bit modes
294                 localPal[0xc0] = 0x0600;
295                 localPal[0xd0] = 0xc000;
296                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
297                 localPal[0xf0] = 0xffff;
298         }
299         Pico.m.dirtyPal = 1;
300
301         memset32(giz_screen, 0, 321*240*2/4);
302         if (currentConfig.EmuOpt&0x8000) {
303                 fb_unlock();
304                 giz_screen = fb_lock(0);
305                 memset32(giz_screen, 0, 321*240*2/4);
306         }
307         fb_unlock();
308         giz_screen = NULL;
309 }
310
311 /*
312 #include <stdarg.h>
313 static void stdbg(const char *fmt, ...)
314 {
315         static int cnt = 0;
316         va_list vl;
317
318         sprintf(noticeMsg, "%x ", cnt++);
319         va_start(vl, fmt);
320         vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
321         va_end(vl);
322
323         noticeMsgTime = GetTickCount();
324 }
325 */
326
327 static void updateSound(int len)
328 {
329         if (PicoOpt&8) len<<=1;
330
331         snd_all_samples += len;
332         PsndOut += len;
333         if (PsndOut - snd_cbuff >= snd_cbuf_samples)
334         {
335                 //if (PsndOut - snd_cbuff != snd_cbuf_samples)
336                 //      stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
337                 PsndOut = snd_cbuff;
338         }
339 }
340
341
342 static void SkipFrame(void)
343 {
344         PicoSkipFrame=1;
345         PicoFrame();
346         PicoSkipFrame=0;
347 }
348
349 /* forced frame to front buffer */
350 void emu_forcedFrame(int opts)
351 {
352         int po_old = PicoOpt;
353         int eo_old = currentConfig.EmuOpt;
354
355         PicoOpt &= ~0x10;
356         PicoOpt |= opts|POPT_ACC_SPRITES;
357         currentConfig.EmuOpt |= 0x80;
358
359         if (giz_screen == NULL)
360                 giz_screen = fb_lock(1);
361
362         PicoDrawSetColorFormat(1);
363         PicoScanBegin = EmuScanBegin16;
364         Pico.m.dirtyPal = 1;
365         PicoFrameDrawOnly();
366
367         fb_unlock();
368         giz_screen = NULL;
369
370         PicoOpt = po_old;
371         currentConfig.EmuOpt = eo_old;
372 }
373
374
375 static void RunEvents(unsigned int which)
376 {
377         if (which & 0x1800) // save or load (but not both)
378         {
379                 int do_it = 1;
380
381                 if (PsndOut != NULL)
382                         FrameworkAudio_SetPause(1);
383                 if (giz_screen == NULL)
384                         giz_screen = fb_lock(1);
385                 if ( emu_checkSaveFile(state_slot) &&
386                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
387                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
388                 {
389                         int keys;
390                         blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
391                         while( !((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) )
392                                 Sleep(50);
393                         if (keys & PBTN_STOP) do_it = 0;
394                         while(  ((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) ) // wait for release
395                                 Sleep(50);
396                         clearArea(0);
397                 }
398
399                 if (do_it)
400                 {
401                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
402                         PicoStateProgressCB = emu_stateCb;
403                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
404                         PicoStateProgressCB = NULL;
405                         Sleep(0);
406                 }
407
408                 if (PsndOut != NULL)
409                         FrameworkAudio_SetPause(0);
410                 reset_timing = 1;
411         }
412         if (which & 0x0400) // switch renderer
413         {
414                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
415                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
416
417                 vidResetMode();
418
419                 if (PicoOpt&0x10) {
420                         strcpy(noticeMsg, " 8bit fast renderer");
421                 } else if (currentConfig.EmuOpt&0x80) {
422                         strcpy(noticeMsg, "16bit accurate renderer");
423                 } else {
424                         strcpy(noticeMsg, " 8bit accurate renderer");
425                 }
426
427                 noticeMsgTime = GetTickCount();
428         }
429         if (which & 0x0300)
430         {
431                 if(which&0x0200) {
432                         state_slot -= 1;
433                         if(state_slot < 0) state_slot = 9;
434                 } else {
435                         state_slot += 1;
436                         if(state_slot > 9) state_slot = 0;
437                 }
438                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
439                 noticeMsgTime = GetTickCount();
440         }
441 }
442
443 static void updateKeys(void)
444 {
445         unsigned int keys, allActions[2] = { 0, 0 }, events;
446         static unsigned int prevEvents = 0;
447         int i;
448
449         keys = Framework_PollGetButtons();
450         if (keys & PBTN_HOME)
451                 engineState = PGS_Menu;
452
453         keys &= CONFIGURABLE_KEYS;
454
455         for (i = 0; i < 32; i++)
456         {
457                 if (keys & (1 << i))
458                 {
459                         int pl, acts = currentConfig.KeyBinds[i];
460                         if (!acts) continue;
461                         pl = (acts >> 16) & 1;
462                         if (kb_combo_keys & (1 << i))
463                         {
464                                 int u = i+1, acts_c = acts & kb_combo_acts;
465                                 // let's try to find the other one
466                                 if (acts_c) {
467                                         for (; u < 32; u++)
468                                                 if ( (keys & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {
469                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];
470                                                         keys &= ~((1 << i) | (1 << u));
471                                                         break;
472                                                 }
473                                 }
474                                 // add non-combo actions if combo ones were not found
475                                 if (!acts_c || u == 32)
476                                         allActions[pl] |= acts & ~kb_combo_acts;
477                         } else {
478                                 allActions[pl] |= acts;
479                         }
480                 }
481         }
482
483         PicoPad[0] = allActions[0] & 0xfff;
484         PicoPad[1] = allActions[1] & 0xfff;
485
486         if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);
487         if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);
488
489         events = (allActions[0] | allActions[1]) >> 16;
490
491         // volume is treated in special way and triggered every frame
492         if ((events & 0x6000) && PsndOut != NULL)
493         {
494                 int vol = currentConfig.volume;
495                 if (events & 0x2000) {
496                         if (vol < 100) vol++;
497                 } else {
498                         if (vol >   0) vol--;
499                 }
500                 FrameworkAudio_SetVolume(vol, vol);
501                 sprintf(noticeMsg, "VOL: %02i ", vol);
502                 noticeMsgTime = GetTickCount();
503                 currentConfig.volume = vol;
504         }
505
506         events &= ~prevEvents;
507         if (events) RunEvents(events);
508         if (movie_data) emu_updateMovie();
509
510         prevEvents = (allActions[0] | allActions[1]) >> 16;
511 }
512
513 void emu_platformDebugCat(char *str)
514 {
515         // nothing
516 }
517
518 static void simpleWait(DWORD until)
519 {
520         DWORD tval;
521         int diff;
522
523         tval = GetTickCount();
524         diff = (int)until - (int)tval;
525         if (diff >= 2)
526                 Sleep(diff - 1);
527
528         while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
529                 spend_cycles(1024*2);
530 }
531
532 void emu_Loop(void)
533 {
534         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
535         char fpsbuff[24]; // fps count c string
536         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
537         int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
538         int target_fps, target_frametime, lim_time, tval_diff, i;
539         char *notice = NULL;
540
541         lprintf("entered emu_Loop()\n");
542
543         fpsbuff[0] = 0;
544
545         // make sure we are in correct mode
546         vidResetMode();
547         if (currentConfig.scaling) PicoOpt|=0x4000;
548         else PicoOpt&=~0x4000;
549         Pico.m.dirtyPal = 1;
550         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
551         emu_findKeyBindCombos();
552
553         // pal/ntsc might have changed, reset related stuff
554         target_fps = Pico.m.pal ? 50 : 60;
555         target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
556         reset_timing = 1;
557
558         // prepare CD buffer
559         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();
560
561         // prepare sound stuff
562         PsndOut = NULL;
563         if (currentConfig.EmuOpt & 4)
564         {
565                 int ret, snd_excess_add, stereo;
566                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
567                         PsndRerate(Pico.m.frame_count ? 1 : 0);
568                 }
569                 stereo=(PicoOpt&8)>>3;
570                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
571                 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
572                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
573                         PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
574                 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
575                 if (ret != 0) {
576                         lprintf("FrameworkAudio_Init() failed: %i\n", ret);
577                         sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
578                         noticeMsgTime = GetTickCount();
579                         currentConfig.EmuOpt &= ~4;
580                 } else {
581                         FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
582                         PicoWriteSound = updateSound;
583                         snd_cbuff = FrameworkAudio_56448Buffer();
584                         PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
585                         snd_all_samples = 0;
586                         PsndRate_old = PsndRate;
587                         PicoOpt_old  = PicoOpt;
588                         pal_old = Pico.m.pal;
589                 }
590         }
591
592         // loop?
593         while (engineState == PGS_Running)
594         {
595                 int modes;
596
597                 tval = GetTickCount();
598                 if (reset_timing || tval < tval_prev) {
599                         //stdbg("timing reset");
600                         reset_timing = 0;
601                         tval_thissec = tval;
602                         frames_shown = frames_done = 0;
603                 }
604
605                 // show notice message?
606                 if (noticeMsgTime) {
607                         static int noticeMsgSum;
608                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
609                                 noticeMsgTime = 0;
610                                 clearArea(0);
611                                 notice = 0;
612                         } else {
613                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
614                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
615                                 notice = noticeMsg;
616                         }
617                 }
618
619                 // check for mode changes
620                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
621                 if (modes != oldmodes) {
622                         oldmodes = modes;
623                         clearArea(1);
624                 }
625
626                 // second passed?
627                 if (tval - tval_thissec >= sec_ms)
628                 {
629 #ifdef BENCHMARK
630                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
631                         if(++bench == 10) {
632                                 bench = 0;
633                                 bench_fps_s = bench_fps;
634                                 bf[bfp++ & 3] = bench_fps;
635                                 bench_fps = 0;
636                         }
637                         bench_fps += frames_shown;
638                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
639 #else
640                         if(currentConfig.EmuOpt & 2)
641                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
642 #endif
643                         //tval_thissec += 1000;
644                         tval_thissec += sec_ms;
645
646                         if (PsndOut != NULL)
647                         {
648                                 /* some code which tries to sync things to audio clock, the dirty way */
649                                 static int audio_skew_prev = 0;
650                                 int audio_skew, adj, co = 9, shift = 7;
651                                 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
652                                 if (PsndRate == 22050) co = 10;
653                                 if (PsndRate  > 22050) co = 11;
654                                 if (PicoOpt&8) shift++;
655                                 if (audio_skew < 0) {
656                                         adj = -((-audio_skew) >> shift);
657                                         if (audio_skew > -(6<<co)) adj>>=1;
658                                         if (audio_skew > -(4<<co)) adj>>=1;
659                                         if (audio_skew > -(2<<co)) adj>>=1;
660                                         if (audio_skew > audio_skew_prev) adj>>=2; // going up already
661                                 } else {
662                                         adj = audio_skew >> shift;
663                                         if (audio_skew < (6<<co)) adj>>=1;
664                                         if (audio_skew < (4<<co)) adj>>=1;
665                                         if (audio_skew < (2<<co)) adj>>=1;
666                                         if (audio_skew < audio_skew_prev) adj>>=2;
667                                 }
668                                 audio_skew_prev = audio_skew;
669                                 target_frametime += adj;
670                                 sec_ms = (target_frametime * target_fps) >> 8;
671                                 //stdbg("%i %i %i", audio_skew, adj, sec_ms);
672                                 frames_done = frames_shown = 0;
673                         }
674                         else if (currentConfig.Frameskip < 0) {
675                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
676                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
677                                 if (frames_shown > frames_done) frames_shown = frames_done;
678                         } else {
679                                 frames_done = frames_shown = 0;
680                         }
681                 }
682 #ifdef PFRAMES
683                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
684 #endif
685
686                 tval_prev = tval;
687                 lim_time = (frames_done+1) * target_frametime;
688                 if (currentConfig.Frameskip >= 0) // frameskip enabled
689                 {
690                         for (i = 0; i < currentConfig.Frameskip; i++) {
691                                 updateKeys();
692                                 SkipFrame(); frames_done++;
693                                 if (PsndOut) { // do framelimitting if sound is enabled
694                                         int tval_diff;
695                                         tval = GetTickCount();
696                                         tval_diff = (int)(tval - tval_thissec) << 8;
697                                         if (tval_diff < lim_time) // we are too fast
698                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
699                                 }
700                                 lim_time += target_frametime;
701                         }
702                 }
703                 else // auto frameskip
704                 {
705                         int tval_diff;
706                         tval = GetTickCount();
707                         tval_diff = (int)(tval - tval_thissec) << 8;
708                         if (tval_diff > lim_time)
709                         {
710                                 // no time left for this frame - skip
711                                 if (tval_diff - lim_time >= (300<<8)) {
712                                         /* something caused a slowdown for us (disk access? cache flush?)
713                                          * try to recover by resetting timing... */
714                                         reset_timing = 1;
715                                         continue;
716                                 }
717                                 updateKeys();
718                                 SkipFrame(); frames_done++;
719                                 continue;
720                         }
721                 }
722
723                 updateKeys();
724
725                 if (currentConfig.EmuOpt&0x80)
726                         /* be sure correct framebuffer is locked */
727                         giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
728
729                 PicoFrame();
730
731                 if (giz_screen == NULL)
732                         giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
733
734                 blit(fpsbuff, notice);
735
736                 if (giz_screen != NULL) {
737                         fb_unlock();
738                         giz_screen = NULL;
739                 }
740
741                 if (currentConfig.EmuOpt&0x2000)
742                         Framework2D_WaitVSync();
743
744                 if (currentConfig.EmuOpt&0x8000)
745                         fb_flip();
746
747                 // check time
748                 tval = GetTickCount();
749                 tval_diff = (int)(tval - tval_thissec) << 8;
750
751                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
752                         reset_timing = 1;
753                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
754                 {
755                         // sleep if we are still too fast
756                         if (tval_diff < lim_time)
757                         {
758                                 // we are too fast
759                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
760                         }
761                 }
762
763                 frames_done++; frames_shown++;
764         }
765
766
767         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();
768
769         if (PsndOut != NULL) {
770                 PsndOut = snd_cbuff = NULL;
771                 FrameworkAudio_Close();
772         }
773
774         // save SRAM
775         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
776                 emu_stateCb("Writing SRAM/BRAM..");
777                 emu_SaveLoadGame(0, 1);
778                 SRam.changed = 0;
779         }
780 }
781
782
783 void emu_ResetGame(void)
784 {
785         PicoReset();
786         reset_timing = 1;
787 }
788