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psp bugfixes, refactoring, 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{
c77ca79e 55 if (giz_screen != NULL) Framework2D_UnlockBuffer();
56 giz_screen = Framework2D_LockBuffer(1);
ea8c405f 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;
c77ca79e 64
65 Framework2D_UnlockBuffer();
66 giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
ea8c405f 67}
68
c77ca79e 69void emu_stateCb(const char *str)
ea8c405f 70{
c77ca79e 71 if (giz_screen != NULL) Framework2D_UnlockBuffer();
72 giz_screen = Framework2D_LockBuffer(1);
9839d126 73
ea8c405f 74 clearArea(0);
75 blit("", str);
9839d126 76
77 Framework2D_UnlockBuffer();
78 giz_screen = NULL;
da42200b 79
80 Sleep(0); /* yield the CPU, the system may need it */
ea8c405f 81}
82
83static void emu_msg_tray_open(void)
84{
85 strcpy(noticeMsg, "CD tray opened");
86 noticeMsgTime = GetTickCount();
87}
88
89
90void emu_Init(void)
91{
92 // make dirs for saves, cfgs, etc.
2ec14aec 93 mkdir("mds", 0777);
94 mkdir("srm", 0777);
95 mkdir("brm", 0777);
96 mkdir("cfg", 0777);
ea8c405f 97
98 PicoInit();
99 PicoMessage = emu_msg_cb;
100 PicoMCDopenTray = emu_msg_tray_open;
101 PicoMCDcloseTray = menu_loop_tray;
102}
103
104void emu_Deinit(void)
105{
106 // save SRAM
3c392aec 107 if ((currentConfig.EmuOpt & 1) && SRam.changed) {
ea8c405f 108 emu_SaveLoadGame(0, 1);
109 SRam.changed = 0;
110 }
111
112 if (!(currentConfig.EmuOpt & 0x20)) {
113 FILE *f = fopen(PicoConfigFile, "r+b");
114 if (!f) emu_WriteConfig(0);
115 else {
116 // if we already have config, reload it, except last ROM
117 fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
118 fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
119 fseek(f, 0, SEEK_SET);
120 fwrite(&currentConfig, 1, sizeof(currentConfig), f);
121 fflush(f);
122 fclose(f);
123 }
124 }
125
126 PicoExit();
127}
128
129void emu_setDefaultConfig(void)
130{
131 memset(&currentConfig, 0, sizeof(currentConfig));
132 currentConfig.lastRomFile[0] = 0;
9839d126 133 currentConfig.EmuOpt = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
fa283c9a 134 currentConfig.PicoOpt = 0x07 | 0xc00; // | cd_pcm, cd_cdda
ea8c405f 135 currentConfig.PsndRate = 22050;
136 currentConfig.PicoRegion = 0; // auto
137 currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
fa283c9a 138 currentConfig.Frameskip = -1; // auto
ea8c405f 139 currentConfig.volume = 50;
140 currentConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
141 currentConfig.KeyBinds[ 3] = 1<<1;
142 currentConfig.KeyBinds[ 0] = 1<<2;
143 currentConfig.KeyBinds[ 1] = 1<<3;
144 currentConfig.KeyBinds[ 5] = 1<<4;
145 currentConfig.KeyBinds[ 6] = 1<<5;
146 currentConfig.KeyBinds[ 7] = 1<<6;
2ec14aec 147 currentConfig.KeyBinds[ 4] = 1<<7;
a8869ad1 148 currentConfig.KeyBinds[13] = 1<<26; // switch rend
ea8c405f 149 currentConfig.KeyBinds[ 8] = 1<<27; // save state
150 currentConfig.KeyBinds[ 9] = 1<<28; // load state
151 currentConfig.KeyBinds[12] = 1<<29; // vol up
152 currentConfig.KeyBinds[11] = 1<<30; // vol down
fa283c9a 153 currentConfig.PicoCDBuffers = 0;
ea8c405f 154 currentConfig.scaling = 0;
155}
156
157
158static int EmuScan16(unsigned int num, void *sdata)
159{
160 if (!(Pico.video.reg[1]&8)) num += 8;
161 DrawLineDest = (unsigned short *) giz_screen + 321*(num+1);
162
c77ca79e 163 if ((currentConfig.EmuOpt&0x4000) && (num&1) == 0) // (Pico.m.frame_count&1))
a8869ad1 164 return 1; // skip next line
165
ea8c405f 166 return 0;
167}
168
169static int EmuScan8(unsigned int num, void *sdata)
170{
171 // draw like the fast renderer
172 if (!(Pico.video.reg[1]&8)) num += 8;
2ec14aec 173 HighCol = gfx_buffer + 328*(num+1);
ea8c405f 174
175 return 0;
176}
177
178static void osd_text(int x, int y, const char *text)
179{
499a0be3 180 int len = strlen(text) * 8 / 2;
181 int *p, h;
ea8c405f 182 for (h = 0; h < 8; h++) {
183 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
184 p = (int *) ((int)p & ~3); // align
499a0be3 185 memset32(p, 0, len);
ea8c405f 186 }
187 emu_textOut16(x, y, text);
188}
189
499a0be3 190/*
191void log1(void *p1, void *p2)
192{
193 lprintf("%p %p %p\n", p1, p2, DrawLineDest);
194}
195*/
ea8c405f 196
9839d126 197static void cd_leds(void)
198{
199 static int old_reg = 0;
200 unsigned int col_g, col_r, *p;
201
202 if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
203 old_reg = Pico_mcd->s68k_regs[0];
204
205 p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
206 col_g = (old_reg & 2) ? 0x06000600 : 0;
207 col_r = (old_reg & 1) ? 0xc000c000 : 0;
208 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
209 *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
210 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
211}
212
213
214static short localPal[0x100];
ea8c405f 215
216static void blit(const char *fps, const char *notice)
217{
218 int emu_opt = currentConfig.EmuOpt;
219
9839d126 220 if (PicoOpt&0x10)
221 {
222 int lines_flags = 224;
ea8c405f 223 // 8bit fast renderer
224 if (Pico.m.dirtyPal) {
225 Pico.m.dirtyPal = 0;
226 vidConvCpyRGB565(localPal, Pico.cram, 0x40);
227 }
a8869ad1 228 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
229 if (currentConfig.EmuOpt&0x4000)
c77ca79e 230 lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
9839d126 231 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
232 }
233 else if (!(emu_opt&0x80))
234 {
235 int lines_flags;
ea8c405f 236 // 8bit accurate renderer
237 if (Pico.m.dirtyPal) {
238 Pico.m.dirtyPal = 0;
239 vidConvCpyRGB565(localPal, Pico.cram, 0x40);
2ec14aec 240 if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
ea8c405f 241 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
9839d126 242 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
2ec14aec 243 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
ea8c405f 244 localPal[0xc0] = 0x0600;
245 localPal[0xd0] = 0xc000;
246 localPal[0xe0] = 0x0000; // reserved pixels for OSD
247 localPal[0xf0] = 0xffff;
248 }
249 /* no support
250 else if (rendstatus & 0x20) { // mid-frame palette changes
251 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
252 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
253 } */
254 }
9839d126 255 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
a8869ad1 256 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
257 if (currentConfig.EmuOpt&0x4000)
c77ca79e 258 lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
9839d126 259 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
ea8c405f 260 }
261
262 if (notice || (emu_opt & 2)) {
263 int h = 232;
264 if (notice) osd_text(4, h, notice);
9839d126 265 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
ea8c405f 266 }
ea8c405f 267
9839d126 268 if ((emu_opt & 0x400) && (PicoMCD & 1))
269 cd_leds();
ea8c405f 270}
271
272// clears whole screen or just the notice area (in all buffers)
273static void clearArea(int full)
274{
275 if (giz_screen == NULL)
c77ca79e 276 giz_screen = Framework2D_LockBuffer(1);
ea8c405f 277 if (full) memset32(giz_screen, 0, 320*240*2/4);
499a0be3 278 else memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
c77ca79e 279
280 if (currentConfig.EmuOpt&0x8000) {
281 Framework2D_UnlockBuffer();
282 giz_screen = Framework2D_LockBuffer(0);
283 if (full) memset32(giz_screen, 0, 320*240*2/4);
284 else memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
285 }
ea8c405f 286}
287
288static void vidResetMode(void)
289{
c77ca79e 290 giz_screen = Framework2D_LockBuffer(1);
499a0be3 291
ea8c405f 292 if (PicoOpt&0x10) {
293 } else if (currentConfig.EmuOpt&0x80) {
294 PicoDrawSetColorFormat(1);
295 PicoScan = EmuScan16;
296 } else {
499a0be3 297 PicoDrawSetColorFormat(-1);
ea8c405f 298 PicoScan = EmuScan8;
299 }
499a0be3 300 if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
ea8c405f 301 // setup pal for 8-bit modes
302 localPal[0xc0] = 0x0600;
303 localPal[0xd0] = 0xc000;
304 localPal[0xe0] = 0x0000; // reserved pixels for OSD
305 localPal[0xf0] = 0xffff;
306 }
307 Pico.m.dirtyPal = 1;
499a0be3 308
309 memset32(giz_screen, 0, 321*240*2/4);
c77ca79e 310 if (currentConfig.EmuOpt&0x8000) {
311 Framework2D_UnlockBuffer();
312 giz_screen = Framework2D_LockBuffer(0);
313 memset32(giz_screen, 0, 321*240*2/4);
314 }
ea8c405f 315 Framework2D_UnlockBuffer();
316 giz_screen = NULL;
317}
318
da42200b 319/*
fa283c9a 320#include <stdarg.h>
321static void stdbg(const char *fmt, ...)
ea8c405f 322{
fa283c9a 323 static int cnt = 0;
324 va_list vl;
325
326 sprintf(noticeMsg, "%x ", cnt++);
327 va_start(vl, fmt);
328 vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
329 va_end(vl);
330
331 noticeMsgTime = GetTickCount();
332}
da42200b 333*/
fa283c9a 334
335static void updateSound(int len)
336{
337 if (PicoOpt&8) len<<=1;
338
339 snd_all_samples += len;
340 PsndOut += len;
341 if (PsndOut - snd_cbuff >= snd_cbuf_samples)
342 {
da42200b 343 //if (PsndOut - snd_cbuff != snd_cbuf_samples)
344 // stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
fa283c9a 345 PsndOut = snd_cbuff;
346 }
347}
348
349
350static void SkipFrame(void)
351{
352 PicoSkipFrame=1;
ea8c405f 353 PicoFrame();
354 PicoSkipFrame=0;
355}
356
c77ca79e 357/* forced frame to front buffer */
ea8c405f 358void emu_forcedFrame(void)
359{
fa283c9a 360 int po_old = PicoOpt;
361 int eo_old = currentConfig.EmuOpt;
362
363 PicoOpt &= ~0x0010;
364 PicoOpt |= 0x4080; // soft_scale | acc_sprites
365 currentConfig.EmuOpt |= 0x80;
366
367 if (giz_screen == NULL)
c77ca79e 368 giz_screen = Framework2D_LockBuffer(1);
fa283c9a 369
370 PicoDrawSetColorFormat(1);
371 PicoScan = EmuScan16;
372 PicoScan((unsigned) -1, NULL);
373 Pico.m.dirtyPal = 1;
374 PicoFrameDrawOnly();
375
376 Framework2D_UnlockBuffer();
377 giz_screen = NULL;
378
379 PicoOpt = po_old;
380 currentConfig.EmuOpt = eo_old;
ea8c405f 381}
382
fa283c9a 383
9839d126 384static void RunEvents(unsigned int which)
385{
da42200b 386 if (which & 0x1800) // save or load (but not both)
387 {
9839d126 388 int do_it = 1;
da42200b 389
390 if (PsndOut != NULL)
391 FrameworkAudio_SetPause(1);
392 if (giz_screen == NULL)
c77ca79e 393 giz_screen = Framework2D_LockBuffer(1);
9839d126 394 if ( emu_checkSaveFile(state_slot) &&
a8869ad1 395 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
396 (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
397 {
9839d126 398 int keys;
399 blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
400 while( !((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) )
401 Sleep(50);
402 if (keys & BTN_STOP) do_it = 0;
da42200b 403 while( ((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) ) // wait for release
404 Sleep(50);
9839d126 405 clearArea(0);
406 }
da42200b 407
408 if (do_it)
409 {
9839d126 410 osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
c77ca79e 411 PicoStateProgressCB = emu_stateCb;
9839d126 412 emu_SaveLoadGame((which & 0x1000) >> 12, 0);
413 PicoStateProgressCB = NULL;
da42200b 414 Sleep(0);
9839d126 415 }
416
da42200b 417 if (PsndOut != NULL)
418 FrameworkAudio_SetPause(0);
9839d126 419 reset_timing = 1;
420 }
da42200b 421 if (which & 0x0400) // switch renderer
422 {
a8869ad1 423 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }
424 else { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
9839d126 425
426 vidResetMode();
427
428 if (PicoOpt&0x10) {
429 strcpy(noticeMsg, " 8bit fast renderer");
430 } else if (currentConfig.EmuOpt&0x80) {
431 strcpy(noticeMsg, "16bit accurate renderer");
432 } else {
433 strcpy(noticeMsg, " 8bit accurate renderer");
434 }
435
436 noticeMsgTime = GetTickCount();
437 }
da42200b 438 if (which & 0x0300)
439 {
9839d126 440 if(which&0x0200) {
441 state_slot -= 1;
442 if(state_slot < 0) state_slot = 9;
443 } else {
444 state_slot += 1;
445 if(state_slot > 9) state_slot = 0;
446 }
447 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
448 noticeMsgTime = GetTickCount();
449 }
450}
451
ea8c405f 452static void updateKeys(void)
453{
2ec14aec 454 unsigned int keys, allActions[2] = { 0, 0 }, events;
455 static unsigned int prevEvents = 0;
456 int i;
457
458 keys = Framework_PollGetButtons();
fa283c9a 459 if (keys & BTN_HOME)
2ec14aec 460 engineState = PGS_Menu;
2ec14aec 461
462 keys &= CONFIGURABLE_KEYS;
463
464 for (i = 0; i < 32; i++)
465 {
fa283c9a 466 if (keys & (1 << i))
467 {
2ec14aec 468 int pl, acts = currentConfig.KeyBinds[i];
469 if (!acts) continue;
470 pl = (acts >> 16) & 1;
fa283c9a 471 if (combo_keys & (1 << i))
472 {
2ec14aec 473 int u = i+1, acts_c = acts & combo_acts;
474 // let's try to find the other one
475 if (acts_c)
476 for (; u < 32; u++)
477 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
478 allActions[pl] |= acts_c;
479 keys &= ~((1 << i) | (1 << u));
480 break;
481 }
482 // add non-combo actions if combo ones were not found
483 if (!acts_c || u == 32)
484 allActions[pl] |= acts & ~combo_acts;
fa283c9a 485 } else {
2ec14aec 486 allActions[pl] |= acts;
487 }
488 }
489 }
490
491 PicoPad[0] = (unsigned short) allActions[0];
492 PicoPad[1] = (unsigned short) allActions[1];
493
494 events = (allActions[0] | allActions[1]) >> 16;
495
496 // volume is treated in special way and triggered every frame
fa283c9a 497 if ((events & 0x6000) && PsndOut != NULL)
498 {
2ec14aec 499 int vol = currentConfig.volume;
500 if (events & 0x2000) {
501 if (vol < 100) vol++;
502 } else {
503 if (vol > 0) vol--;
504 }
fa283c9a 505 FrameworkAudio_SetVolume(vol, vol);
c77ca79e 506 sprintf(noticeMsg, "VOL: %02i ", vol);
2ec14aec 507 noticeMsgTime = GetTickCount();
508 currentConfig.volume = vol;
509 }
510
511 events &= ~prevEvents;
9839d126 512 if (events) RunEvents(events);
2ec14aec 513 if (movie_data) emu_updateMovie();
514
515 prevEvents = (allActions[0] | allActions[1]) >> 16;
ea8c405f 516}
517
fa283c9a 518static void find_combos(void)
519{
520 int act, u;
521
522 // find out which keys and actions are combos
523 combo_keys = combo_acts = 0;
524 for (act = 0; act < 32; act++)
525 {
526 int keyc = 0;
527 if (act == 16 || act == 17) continue; // player2 flag
528 for (u = 0; u < 32; u++)
529 {
530 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
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
ea8c405f 547static void simpleWait(DWORD until)
548{
9839d126 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);
ea8c405f 559}
560
561void emu_Loop(void)
562{
fa283c9a 563 static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
ea8c405f 564 char fpsbuff[24]; // fps count c string
565 DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
fa283c9a 566 int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
ea8c405f 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;
fa283c9a 580 find_combos();
ea8c405f 581
582 // pal/ntsc might have changed, reset related stuff
583 target_fps = Pico.m.pal ? 50 : 60;
fa283c9a 584 target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
ea8c405f 585 reset_timing = 1;
586
fa283c9a 587 // prepare CD buffer
588 if (PicoMCD & 1) PicoCDBufferInit();
589
ea8c405f 590 // prepare sound stuff
fa283c9a 591 PsndOut = NULL;
592 if (currentConfig.EmuOpt & 4)
593 {
da42200b 594 int ret, snd_excess_add, stereo;
ea8c405f 595 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
9d917eea 596 PsndRerate(Pico.m.frame_count ? 1 : 0);
ea8c405f 597 }
da42200b 598 stereo=(PicoOpt&8)>>3;
ea8c405f 599 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
fa283c9a 600 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
ea8c405f 601 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
f3d1de29 602 PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
fa283c9a 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 }
ea8c405f 619 }
620
ea8c405f 621 // loop?
622 while (engineState == PGS_Running)
623 {
624 int modes;
625
626 tval = GetTickCount();
627 if (reset_timing || tval < tval_prev) {
da42200b 628 //stdbg("timing reset");
ea8c405f 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) {
ea8c405f 651 oldmodes = modes;
652 clearArea(1);
653 }
654
655 // second passed?
fa283c9a 656 if (tval - tval_thissec >= sec_ms)
ea8c405f 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
fa283c9a 672 //tval_thissec += 1000;
673 tval_thissec += sec_ms;
ea8c405f 674
fa283c9a 675 if (PsndOut != NULL)
676 {
f3d1de29 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;
fa283c9a 680 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
f3d1de29 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;
fa283c9a 698 target_frametime += adj;
699 sec_ms = (target_frametime * target_fps) >> 8;
da42200b 700 //stdbg("%i %i %i", audio_skew, adj, sec_ms);
ea8c405f 701 frames_done = frames_shown = 0;
fa283c9a 702 }
703 else if (currentConfig.Frameskip < 0) {
ea8c405f 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;
fa283c9a 707 } else {
708 frames_done = frames_shown = 0;
ea8c405f 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();
fa283c9a 721 SkipFrame(); frames_done++;
ea8c405f 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();
fa283c9a 747 SkipFrame(); frames_done++;
ea8c405f 748 continue;
749 }
750 }
751
752 updateKeys();
753
c77ca79e 754 if (currentConfig.EmuOpt&0x80)
755 /* be sure correct framebuffer is locked */
756 giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
757
499a0be3 758 if (!(PicoOpt&0x10))
759 PicoScan((unsigned) -1, NULL);
ea8c405f 760
761 PicoFrame();
499a0be3 762
763 if (giz_screen == NULL)
c77ca79e 764 giz_screen = Framework2D_LockBuffer((currentConfig.EmuOpt&0x8000) ? 0 : 1);
499a0be3 765
ea8c405f 766 blit(fpsbuff, notice);
767
768 if (giz_screen != NULL) {
769 Framework2D_UnlockBuffer();
770 giz_screen = NULL;
771 }
772
c77ca79e 773 if (currentConfig.EmuOpt&0x2000)
774 Framework2D_WaitVSync();
775
776 if (currentConfig.EmuOpt&0x8000)
777 Framework2D_Flip();
778
ea8c405f 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
fa283c9a 801 if (PsndOut != NULL) {
802 PsndOut = snd_cbuff = NULL;
803 FrameworkAudio_Close();
804 }
805
ea8c405f 806 // save SRAM
807 if ((currentConfig.EmuOpt & 1) && SRam.changed) {
c77ca79e 808 emu_stateCb("Writing SRAM/BRAM..");
ea8c405f 809 emu_SaveLoadGame(0, 1);
810 SRam.changed = 0;
811 }
812}
813
814
815void emu_ResetGame(void)
816{
817 PicoReset(0);
818 reset_timing = 1;
819}
e5f426aa 820
fast MegaDrive/MegaCD/32X emulator