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renderers (interlace and stuff)
[picodrive.git] / platform / gizmondo / emu.c
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e5f426aa 1#include <windows.h>
ea8c405f 2#include <string.h>
e5f426aa 3
2ec14aec 4#include <sys/stat.h> // mkdir
5#include <sys/types.h>
6
7#include "kgsdk/Framework.h"
ea8c405f 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"
e5f426aa 13#include "emu.h"
ea8c405f 14#include "menu.h"
15#include "giz.h"
16#include "asm_utils.h"
e5f426aa 17
ea8c405f 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.
27unsigned char gfx_buffer[321*240*2*2];
e5f426aa 28char romFileName[MAX_PATH];
29int engineState;
e5f426aa 30
ea8c405f 31unsigned char *PicoDraw2FB = gfx_buffer; // temporary buffer for alt renderer ( (8+320)*(8+240+8) )
e5f426aa 32int reset_timing = 0;
ea8c405f 33
fa283c9a 34static int combo_keys = 0, combo_acts = 0; // keys and actions which need button combos
ea8c405f 35static DWORD noticeMsgTime = 0;
fa283c9a 36static short *snd_cbuff = NULL;
37static int snd_cbuf_samples = 0, snd_all_samples = 0;
ea8c405f 38
39
40static void blit(const char *fps, const char *notice);
41static void clearArea(int full);
42
43void emu_noticeMsgUpdated(void)
44{
45 noticeMsgTime = GetTickCount();
46}
47
48void emu_getMainDir(char *dst, int len)
49{
50 if (len > 0) *dst = 0;
51}
52
53static void emu_msg_cb(const char *msg)
54{
55 if (giz_screen == NULL)
56 giz_screen = Framework2D_LockBuffer();
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
66static void emu_state_cb(const char *str)
67{
9839d126 68 if (giz_screen == NULL)
69 giz_screen = Framework2D_LockBuffer();
70
ea8c405f 71 clearArea(0);
72 blit("", str);
9839d126 73
74 Framework2D_UnlockBuffer();
75 giz_screen = NULL;
ea8c405f 76}
77
78static void emu_msg_tray_open(void)
79{
80 strcpy(noticeMsg, "CD tray opened");
81 noticeMsgTime = GetTickCount();
82}
83
84
85void emu_Init(void)
86{
87 // make dirs for saves, cfgs, etc.
2ec14aec 88 mkdir("mds", 0777);
89 mkdir("srm", 0777);
90 mkdir("brm", 0777);
91 mkdir("cfg", 0777);
ea8c405f 92
93 PicoInit();
94 PicoMessage = emu_msg_cb;
95 PicoMCDopenTray = emu_msg_tray_open;
96 PicoMCDcloseTray = menu_loop_tray;
97}
98
99void emu_Deinit(void)
100{
101 // save SRAM
102 if((currentConfig.EmuOpt & 1) && SRam.changed) {
103 emu_SaveLoadGame(0, 1);
104 SRam.changed = 0;
105 }
106
107 if (!(currentConfig.EmuOpt & 0x20)) {
108 FILE *f = fopen(PicoConfigFile, "r+b");
109 if (!f) emu_WriteConfig(0);
110 else {
111 // if we already have config, reload it, except last ROM
112 fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
113 fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
114 fseek(f, 0, SEEK_SET);
115 fwrite(&currentConfig, 1, sizeof(currentConfig), f);
116 fflush(f);
117 fclose(f);
118 }
119 }
120
121 PicoExit();
122}
123
124void emu_setDefaultConfig(void)
125{
126 memset(&currentConfig, 0, sizeof(currentConfig));
127 currentConfig.lastRomFile[0] = 0;
9839d126 128 currentConfig.EmuOpt = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
fa283c9a 129 currentConfig.PicoOpt = 0x07 | 0xc00; // | cd_pcm, cd_cdda
ea8c405f 130 currentConfig.PsndRate = 22050;
131 currentConfig.PicoRegion = 0; // auto
132 currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
fa283c9a 133 currentConfig.Frameskip = -1; // auto
ea8c405f 134 currentConfig.volume = 50;
135 currentConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
136 currentConfig.KeyBinds[ 3] = 1<<1;
137 currentConfig.KeyBinds[ 0] = 1<<2;
138 currentConfig.KeyBinds[ 1] = 1<<3;
139 currentConfig.KeyBinds[ 5] = 1<<4;
140 currentConfig.KeyBinds[ 6] = 1<<5;
141 currentConfig.KeyBinds[ 7] = 1<<6;
2ec14aec 142 currentConfig.KeyBinds[ 4] = 1<<7;
a8869ad1 143 currentConfig.KeyBinds[13] = 1<<26; // switch rend
ea8c405f 144 currentConfig.KeyBinds[ 8] = 1<<27; // save state
145 currentConfig.KeyBinds[ 9] = 1<<28; // load state
146 currentConfig.KeyBinds[12] = 1<<29; // vol up
147 currentConfig.KeyBinds[11] = 1<<30; // vol down
fa283c9a 148 currentConfig.PicoCDBuffers = 0;
ea8c405f 149 currentConfig.scaling = 0;
150}
151
152
153static int EmuScan16(unsigned int num, void *sdata)
154{
155 if (!(Pico.video.reg[1]&8)) num += 8;
156 DrawLineDest = (unsigned short *) giz_screen + 321*(num+1);
157
a8869ad1 158 if ((currentConfig.EmuOpt&0x4000) && (num&1) == (Pico.m.frame_count&1))
159 return 1; // skip next line
160
ea8c405f 161 return 0;
162}
163
164static int EmuScan8(unsigned int num, void *sdata)
165{
166 // draw like the fast renderer
167 if (!(Pico.video.reg[1]&8)) num += 8;
2ec14aec 168 HighCol = gfx_buffer + 328*(num+1);
ea8c405f 169
170 return 0;
171}
172
173static void osd_text(int x, int y, const char *text)
174{
499a0be3 175 int len = strlen(text) * 8 / 2;
176 int *p, h;
ea8c405f 177 for (h = 0; h < 8; h++) {
178 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
179 p = (int *) ((int)p & ~3); // align
499a0be3 180 memset32(p, 0, len);
ea8c405f 181 }
182 emu_textOut16(x, y, text);
183}
184
499a0be3 185/*
186void log1(void *p1, void *p2)
187{
188 lprintf("%p %p %p\n", p1, p2, DrawLineDest);
189}
190*/
ea8c405f 191
9839d126 192static void cd_leds(void)
193{
194 static int old_reg = 0;
195 unsigned int col_g, col_r, *p;
196
197 if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
198 old_reg = Pico_mcd->s68k_regs[0];
199
200 p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
201 col_g = (old_reg & 2) ? 0x06000600 : 0;
202 col_r = (old_reg & 1) ? 0xc000c000 : 0;
203 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
204 *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
205 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
206}
207
208
209static short localPal[0x100];
ea8c405f 210
211static void blit(const char *fps, const char *notice)
212{
213 int emu_opt = currentConfig.EmuOpt;
214
9839d126 215 if (PicoOpt&0x10)
216 {
217 int lines_flags = 224;
ea8c405f 218 // 8bit fast renderer
219 if (Pico.m.dirtyPal) {
220 Pico.m.dirtyPal = 0;
221 vidConvCpyRGB565(localPal, Pico.cram, 0x40);
222 }
a8869ad1 223 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
224 if (currentConfig.EmuOpt&0x4000)
225 lines_flags|=(Pico.m.frame_count&1)?0x20000:0x40000;
9839d126 226 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
227 }
228 else if (!(emu_opt&0x80))
229 {
230 int lines_flags;
ea8c405f 231 // 8bit accurate renderer
232 if (Pico.m.dirtyPal) {
233 Pico.m.dirtyPal = 0;
234 vidConvCpyRGB565(localPal, Pico.cram, 0x40);
2ec14aec 235 if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
ea8c405f 236 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
9839d126 237 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
2ec14aec 238 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
ea8c405f 239 localPal[0xc0] = 0x0600;
240 localPal[0xd0] = 0xc000;
241 localPal[0xe0] = 0x0000; // reserved pixels for OSD
242 localPal[0xf0] = 0xffff;
243 }
244 /* no support
245 else if (rendstatus & 0x20) { // mid-frame palette changes
246 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
247 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
248 } */
249 }
9839d126 250 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
a8869ad1 251 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
252 if (currentConfig.EmuOpt&0x4000)
253 lines_flags|=(Pico.m.frame_count&1)?0x20000:0x40000;
9839d126 254 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
ea8c405f 255 }
256
257 if (notice || (emu_opt & 2)) {
258 int h = 232;
259 if (notice) osd_text(4, h, notice);
9839d126 260 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
ea8c405f 261 }
ea8c405f 262
9839d126 263 if ((emu_opt & 0x400) && (PicoMCD & 1))
264 cd_leds();
ea8c405f 265}
266
267// clears whole screen or just the notice area (in all buffers)
268static void clearArea(int full)
269{
270 if (giz_screen == NULL)
271 giz_screen = Framework2D_LockBuffer();
272 if (full) memset32(giz_screen, 0, 320*240*2/4);
499a0be3 273 else memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
ea8c405f 274}
275
276static void vidResetMode(void)
277{
499a0be3 278 giz_screen = Framework2D_LockBuffer();
279
ea8c405f 280 if (PicoOpt&0x10) {
281 } else if (currentConfig.EmuOpt&0x80) {
282 PicoDrawSetColorFormat(1);
283 PicoScan = EmuScan16;
284 } else {
499a0be3 285 PicoDrawSetColorFormat(-1);
ea8c405f 286 PicoScan = EmuScan8;
287 }
499a0be3 288 if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
ea8c405f 289 // setup pal for 8-bit modes
290 localPal[0xc0] = 0x0600;
291 localPal[0xd0] = 0xc000;
292 localPal[0xe0] = 0x0000; // reserved pixels for OSD
293 localPal[0xf0] = 0xffff;
294 }
295 Pico.m.dirtyPal = 1;
499a0be3 296
297 memset32(giz_screen, 0, 321*240*2/4);
ea8c405f 298 Framework2D_UnlockBuffer();
299 giz_screen = NULL;
300}
301
302
fa283c9a 303#include <stdarg.h>
304static void stdbg(const char *fmt, ...)
ea8c405f 305{
fa283c9a 306 static int cnt = 0;
307 va_list vl;
308
309 sprintf(noticeMsg, "%x ", cnt++);
310 va_start(vl, fmt);
311 vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
312 va_end(vl);
313
314 noticeMsgTime = GetTickCount();
315}
316
317
318static void updateSound(int len)
319{
320 if (PicoOpt&8) len<<=1;
321
322 snd_all_samples += len;
323 PsndOut += len;
324 if (PsndOut - snd_cbuff >= snd_cbuf_samples)
325 {
326 if (PsndOut - snd_cbuff != snd_cbuf_samples)
327 stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
328 PsndOut = snd_cbuff;
329 }
330}
331
332
333static void SkipFrame(void)
334{
335 PicoSkipFrame=1;
ea8c405f 336 PicoFrame();
337 PicoSkipFrame=0;
338}
339
340void emu_forcedFrame(void)
341{
fa283c9a 342 int po_old = PicoOpt;
343 int eo_old = currentConfig.EmuOpt;
344
345 PicoOpt &= ~0x0010;
346 PicoOpt |= 0x4080; // soft_scale | acc_sprites
347 currentConfig.EmuOpt |= 0x80;
348
349 if (giz_screen == NULL)
350 giz_screen = Framework2D_LockBuffer();
351
352 PicoDrawSetColorFormat(1);
353 PicoScan = EmuScan16;
354 PicoScan((unsigned) -1, NULL);
355 Pico.m.dirtyPal = 1;
356 PicoFrameDrawOnly();
357
358 Framework2D_UnlockBuffer();
359 giz_screen = NULL;
360
361 PicoOpt = po_old;
362 currentConfig.EmuOpt = eo_old;
ea8c405f 363}
364
fa283c9a 365
9839d126 366static void RunEvents(unsigned int which)
367{
368 if (which & 0x1800) { // save or load (but not both)
369 int do_it = 1;
370 if ( emu_checkSaveFile(state_slot) &&
a8869ad1 371 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
372 (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
373 {
9839d126 374 int keys;
a8869ad1 375 if (giz_screen == NULL)
376 giz_screen = Framework2D_LockBuffer();
9839d126 377 blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
378 while( !((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) )
379 Sleep(50);
380 if (keys & BTN_STOP) do_it = 0;
381 clearArea(0);
382 }
383 if (do_it) {
384 osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
385 PicoStateProgressCB = emu_state_cb;
386 emu_SaveLoadGame((which & 0x1000) >> 12, 0);
387 PicoStateProgressCB = NULL;
388 }
389
390 reset_timing = 1;
391 }
392 if (which & 0x0400) { // switch renderer
a8869ad1 393 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }
394 else { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
9839d126 395
396 vidResetMode();
397
398 if (PicoOpt&0x10) {
399 strcpy(noticeMsg, " 8bit fast renderer");
400 } else if (currentConfig.EmuOpt&0x80) {
401 strcpy(noticeMsg, "16bit accurate renderer");
402 } else {
403 strcpy(noticeMsg, " 8bit accurate renderer");
404 }
405
406 noticeMsgTime = GetTickCount();
407 }
408 if (which & 0x0300) {
409 if(which&0x0200) {
410 state_slot -= 1;
411 if(state_slot < 0) state_slot = 9;
412 } else {
413 state_slot += 1;
414 if(state_slot > 9) state_slot = 0;
415 }
416 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
417 noticeMsgTime = GetTickCount();
418 }
419}
420
ea8c405f 421static void updateKeys(void)
422{
2ec14aec 423 unsigned int keys, allActions[2] = { 0, 0 }, events;
424 static unsigned int prevEvents = 0;
425 int i;
426
427 keys = Framework_PollGetButtons();
fa283c9a 428 if (keys & BTN_HOME)
2ec14aec 429 engineState = PGS_Menu;
2ec14aec 430
431 keys &= CONFIGURABLE_KEYS;
432
433 for (i = 0; i < 32; i++)
434 {
fa283c9a 435 if (keys & (1 << i))
436 {
2ec14aec 437 int pl, acts = currentConfig.KeyBinds[i];
438 if (!acts) continue;
439 pl = (acts >> 16) & 1;
fa283c9a 440 if (combo_keys & (1 << i))
441 {
2ec14aec 442 int u = i+1, acts_c = acts & combo_acts;
443 // let's try to find the other one
444 if (acts_c)
445 for (; u < 32; u++)
446 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
447 allActions[pl] |= acts_c;
448 keys &= ~((1 << i) | (1 << u));
449 break;
450 }
451 // add non-combo actions if combo ones were not found
452 if (!acts_c || u == 32)
453 allActions[pl] |= acts & ~combo_acts;
fa283c9a 454 } else {
2ec14aec 455 allActions[pl] |= acts;
456 }
457 }
458 }
459
460 PicoPad[0] = (unsigned short) allActions[0];
461 PicoPad[1] = (unsigned short) allActions[1];
462
463 events = (allActions[0] | allActions[1]) >> 16;
464
465 // volume is treated in special way and triggered every frame
fa283c9a 466 if ((events & 0x6000) && PsndOut != NULL)
467 {
2ec14aec 468 int vol = currentConfig.volume;
469 if (events & 0x2000) {
470 if (vol < 100) vol++;
471 } else {
472 if (vol > 0) vol--;
473 }
fa283c9a 474 FrameworkAudio_SetVolume(vol, vol);
2ec14aec 475 sprintf(noticeMsg, "VOL: %02i", vol);
476 noticeMsgTime = GetTickCount();
477 currentConfig.volume = vol;
478 }
479
480 events &= ~prevEvents;
9839d126 481 if (events) RunEvents(events);
2ec14aec 482 if (movie_data) emu_updateMovie();
483
484 prevEvents = (allActions[0] | allActions[1]) >> 16;
ea8c405f 485}
486
fa283c9a 487static void find_combos(void)
488{
489 int act, u;
490
491 // find out which keys and actions are combos
492 combo_keys = combo_acts = 0;
493 for (act = 0; act < 32; act++)
494 {
495 int keyc = 0;
496 if (act == 16 || act == 17) continue; // player2 flag
497 for (u = 0; u < 32; u++)
498 {
499 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
500 }
501 if (keyc > 1)
502 {
503 // loop again and mark those keys and actions as combo
504 for (u = 0; u < 32; u++)
505 {
506 if (currentConfig.KeyBinds[u] & (1 << act)) {
507 combo_keys |= 1 << u;
508 combo_acts |= 1 << act;
509 }
510 }
511 }
512 }
513}
514
515
ea8c405f 516static void simpleWait(DWORD until)
517{
9839d126 518 DWORD tval;
519 int diff;
520
521 tval = GetTickCount();
522 diff = (int)until - (int)tval;
523 if (diff >= 2)
524 Sleep(diff - 1);
525
526 while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
527 spend_cycles(1024*2);
ea8c405f 528}
529
530void emu_Loop(void)
531{
fa283c9a 532 static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
ea8c405f 533 char fpsbuff[24]; // fps count c string
534 DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
fa283c9a 535 int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
ea8c405f 536 int target_fps, target_frametime, lim_time, tval_diff, i;
537 char *notice = NULL;
538
539 lprintf("entered emu_Loop()\n");
540
541 fpsbuff[0] = 0;
542
543 // make sure we are in correct mode
544 vidResetMode();
545 if (currentConfig.scaling) PicoOpt|=0x4000;
546 else PicoOpt&=~0x4000;
547 Pico.m.dirtyPal = 1;
548 oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
fa283c9a 549 find_combos();
ea8c405f 550
551 // pal/ntsc might have changed, reset related stuff
552 target_fps = Pico.m.pal ? 50 : 60;
fa283c9a 553 target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
ea8c405f 554 reset_timing = 1;
555
fa283c9a 556 // prepare CD buffer
557 if (PicoMCD & 1) PicoCDBufferInit();
558
ea8c405f 559 // prepare sound stuff
fa283c9a 560 PsndOut = NULL;
561 if (currentConfig.EmuOpt & 4)
562 {
563 int ret, snd_excess_add, stereo=(PicoOpt&8)>>3;
ea8c405f 564 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
565 sound_rerate(Pico.m.frame_count ? 1 : 0);
566 }
567 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
fa283c9a 568 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
ea8c405f 569 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
f3d1de29 570 PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
fa283c9a 571 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
572 if (ret != 0) {
573 lprintf("FrameworkAudio_Init() failed: %i\n", ret);
574 sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
575 noticeMsgTime = GetTickCount();
576 currentConfig.EmuOpt &= ~4;
577 } else {
578 FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
579 PicoWriteSound = updateSound;
580 snd_cbuff = FrameworkAudio_56448Buffer();
581 PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
582 snd_all_samples = 0;
583 PsndRate_old = PsndRate;
584 PicoOpt_old = PicoOpt;
585 pal_old = Pico.m.pal;
586 }
ea8c405f 587 }
588
ea8c405f 589 // loop?
590 while (engineState == PGS_Running)
591 {
592 int modes;
593
594 tval = GetTickCount();
595 if (reset_timing || tval < tval_prev) {
fa283c9a 596 stdbg("timing reset");
ea8c405f 597 reset_timing = 0;
598 tval_thissec = tval;
599 frames_shown = frames_done = 0;
600 }
601
602 // show notice message?
603 if (noticeMsgTime) {
604 static int noticeMsgSum;
605 if (tval - noticeMsgTime > 2000) { // > 2.0 sec
606 noticeMsgTime = 0;
607 clearArea(0);
608 notice = 0;
609 } else {
610 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
611 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
612 notice = noticeMsg;
613 }
614 }
615
616 // check for mode changes
617 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
618 if (modes != oldmodes) {
ea8c405f 619 oldmodes = modes;
620 clearArea(1);
621 }
622
623 // second passed?
fa283c9a 624 if (tval - tval_thissec >= sec_ms)
ea8c405f 625 {
626#ifdef BENCHMARK
627 static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
628 if(++bench == 10) {
629 bench = 0;
630 bench_fps_s = bench_fps;
631 bf[bfp++ & 3] = bench_fps;
632 bench_fps = 0;
633 }
634 bench_fps += frames_shown;
635 sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
636#else
637 if(currentConfig.EmuOpt & 2)
638 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
639#endif
fa283c9a 640 //tval_thissec += 1000;
641 tval_thissec += sec_ms;
ea8c405f 642
fa283c9a 643 if (PsndOut != NULL)
644 {
f3d1de29 645 /* some code which tries to sync things to audio clock, the dirty way */
646 static int audio_skew_prev = 0;
647 int audio_skew, adj, co = 9, shift = 7;
fa283c9a 648 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
f3d1de29 649 if (PsndRate == 22050) co = 10;
650 if (PsndRate > 22050) co = 11;
651 if (PicoOpt&8) shift++;
652 if (audio_skew < 0) {
653 adj = -((-audio_skew) >> shift);
654 if (audio_skew > -(6<<co)) adj>>=1;
655 if (audio_skew > -(4<<co)) adj>>=1;
656 if (audio_skew > -(2<<co)) adj>>=1;
657 if (audio_skew > audio_skew_prev) adj>>=2; // going up already
658 } else {
659 adj = audio_skew >> shift;
660 if (audio_skew < (6<<co)) adj>>=1;
661 if (audio_skew < (4<<co)) adj>>=1;
662 if (audio_skew < (2<<co)) adj>>=1;
663 if (audio_skew < audio_skew_prev) adj>>=2;
664 }
665 audio_skew_prev = audio_skew;
fa283c9a 666 target_frametime += adj;
667 sec_ms = (target_frametime * target_fps) >> 8;
668 stdbg("%i %i %i", audio_skew, adj, sec_ms);
ea8c405f 669 frames_done = frames_shown = 0;
fa283c9a 670 }
671 else if (currentConfig.Frameskip < 0) {
ea8c405f 672 frames_done -= target_fps; if (frames_done < 0) frames_done = 0;
673 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
674 if (frames_shown > frames_done) frames_shown = frames_done;
fa283c9a 675 } else {
676 frames_done = frames_shown = 0;
ea8c405f 677 }
678 }
679#ifdef PFRAMES
680 sprintf(fpsbuff, "%i", Pico.m.frame_count);
681#endif
682
683 tval_prev = tval;
684 lim_time = (frames_done+1) * target_frametime;
685 if (currentConfig.Frameskip >= 0) // frameskip enabled
686 {
687 for (i = 0; i < currentConfig.Frameskip; i++) {
688 updateKeys();
fa283c9a 689 SkipFrame(); frames_done++;
ea8c405f 690 if (PsndOut) { // do framelimitting if sound is enabled
691 int tval_diff;
692 tval = GetTickCount();
693 tval_diff = (int)(tval - tval_thissec) << 8;
694 if (tval_diff < lim_time) // we are too fast
695 simpleWait(tval + ((lim_time - tval_diff)>>8));
696 }
697 lim_time += target_frametime;
698 }
699 }
700 else // auto frameskip
701 {
702 int tval_diff;
703 tval = GetTickCount();
704 tval_diff = (int)(tval - tval_thissec) << 8;
705 if (tval_diff > lim_time)
706 {
707 // no time left for this frame - skip
708 if (tval_diff - lim_time >= (300<<8)) {
709 /* something caused a slowdown for us (disk access? cache flush?)
710 * try to recover by resetting timing... */
711 reset_timing = 1;
712 continue;
713 }
714 updateKeys();
fa283c9a 715 SkipFrame(); frames_done++;
ea8c405f 716 continue;
717 }
718 }
719
720 updateKeys();
721
499a0be3 722 if (giz_screen == NULL && (currentConfig.EmuOpt&0x80))
ea8c405f 723 giz_screen = Framework2D_LockBuffer();
499a0be3 724 if (!(PicoOpt&0x10))
725 PicoScan((unsigned) -1, NULL);
ea8c405f 726
727 PicoFrame();
499a0be3 728
a8869ad1 729 if (currentConfig.EmuOpt&0x2000)
730 Framework2D_WaitVSync();
731
499a0be3 732 if (giz_screen == NULL)
733 giz_screen = Framework2D_LockBuffer();
734
ea8c405f 735 blit(fpsbuff, notice);
736
737 if (giz_screen != NULL) {
738 Framework2D_UnlockBuffer();
739 giz_screen = NULL;
740 }
741
742 // check time
743 tval = GetTickCount();
744 tval_diff = (int)(tval - tval_thissec) << 8;
745
746 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
747 reset_timing = 1;
748 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
749 {
750 // sleep if we are still too fast
751 if (tval_diff < lim_time)
752 {
753 // we are too fast
754 simpleWait(tval + ((lim_time - tval_diff) >> 8));
755 }
756 }
757
758 frames_done++; frames_shown++;
759 }
760
761
762 if (PicoMCD & 1) PicoCDBufferFree();
763
fa283c9a 764 if (PsndOut != NULL) {
765 PsndOut = snd_cbuff = NULL;
766 FrameworkAudio_Close();
767 }
768
ea8c405f 769 // save SRAM
770 if ((currentConfig.EmuOpt & 1) && SRam.changed) {
771 emu_state_cb("Writing SRAM/BRAM..");
772 emu_SaveLoadGame(0, 1);
773 SRam.changed = 0;
774 }
775}
776
777
778void emu_ResetGame(void)
779{
780 PicoReset(0);
781 reset_timing = 1;
782}
e5f426aa 783
fast MegaDrive/MegaCD/32X emulator