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 DWORD noticeMsgTime = 0;
  35 static int osd_fps_x;
  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 void emu_getMainDir(char *dst, int len)
  47 {
  48         if (len > 0) *dst = 0;
  49 }
  50
  51 static void emu_msg_cb(const char *msg)
  52 {
  53         if (giz_screen == NULL)
  54                 giz_screen = Framework2D_LockBuffer();
  55
  56         memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
  57         emu_textOut16(4, 232, msg);
  58         noticeMsgTime = GetTickCount() - 2000;
  59
  60         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  61         reset_timing = 1;
  62 }
  63
  64 static void emu_state_cb(const char *str)
  65 {
  66         clearArea(0);
  67         blit("", str);
  68 }
  69
  70 static void emu_msg_tray_open(void)
  71 {
  72         strcpy(noticeMsg, "CD tray opened");
  73         noticeMsgTime = GetTickCount();
  74 }
  75
  76
  77 void emu_Init(void)
  78 {
  79         // make dirs for saves, cfgs, etc.
  80         mkdir("mds", 0777);
  81         mkdir("srm", 0777);
  82         mkdir("brm", 0777);
  83         mkdir("cfg", 0777);
  84
  85         PicoInit();
  86         PicoMessage = emu_msg_cb;
  87         PicoMCDopenTray = emu_msg_tray_open;
  88         PicoMCDcloseTray = menu_loop_tray;
  89 }
  90
  91 void emu_Deinit(void)
  92 {
  93         // save SRAM
  94         if((currentConfig.EmuOpt & 1) && SRam.changed) {
  95                 emu_SaveLoadGame(0, 1);
  96                 SRam.changed = 0;
  97         }
  98
  99         if (!(currentConfig.EmuOpt & 0x20)) {
 100                 FILE *f = fopen(PicoConfigFile, "r+b");
 101                 if (!f) emu_WriteConfig(0);
 102                 else {
 103                         // if we already have config, reload it, except last ROM
 104                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 105                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 106                         fseek(f, 0, SEEK_SET);
 107                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 108                         fflush(f);
 109                         fclose(f);
 110                 }
 111         }
 112
 113         PicoExit();
 114 }
 115
 116 void emu_setDefaultConfig(void)
 117 {
 118         memset(&currentConfig, 0, sizeof(currentConfig));
 119         currentConfig.lastRomFile[0] = 0;
 120         currentConfig.EmuOpt  = 0x1f | 0x600; // | confirm_save, cd_leds
 121         currentConfig.PicoOpt = 0x0f | 0xc00; // | cd_pcm, cd_cdda
 122         currentConfig.PsndRate = 22050;
 123         currentConfig.PicoRegion = 0; // auto
 124         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 125         currentConfig.Frameskip = 0;//-1; // auto
 126         currentConfig.volume = 50;
 127         currentConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
 128         currentConfig.KeyBinds[ 3] = 1<<1;
 129         currentConfig.KeyBinds[ 0] = 1<<2;
 130         currentConfig.KeyBinds[ 1] = 1<<3;
 131         currentConfig.KeyBinds[ 5] = 1<<4;
 132         currentConfig.KeyBinds[ 6] = 1<<5;
 133         currentConfig.KeyBinds[ 7] = 1<<6;
 134         currentConfig.KeyBinds[ 4] = 1<<7;
 135         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 136         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 137         currentConfig.KeyBinds[12] = 1<<29; // vol up
 138         currentConfig.KeyBinds[11] = 1<<30; // vol down
 139         currentConfig.PicoCDBuffers = 64;
 140         currentConfig.scaling = 0;
 141 }
 142
 143
 144 static int EmuScan16(unsigned int num, void *sdata)
 145 {
 146         if (!(Pico.video.reg[1]&8)) num += 8;
 147         DrawLineDest = (unsigned short *) giz_screen + 321*(num+1);
 148
 149         return 0;
 150 }
 151
 152 static int EmuScan8(unsigned int num, void *sdata)
 153 {
 154         // draw like the fast renderer
 155         if (!(Pico.video.reg[1]&8)) num += 8;
 156         HighCol = gfx_buffer + 328*(num+1);
 157
 158         return 0;
 159 }
 160
 161 static void osd_text(int x, int y, const char *text)
 162 {
 163         int len = strlen(text) * 8 / 2;
 164         int *p, h;
 165         for (h = 0; h < 8; h++) {
 166                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 167                 p = (int *) ((int)p & ~3); // align
 168                 memset32(p, 0, len);
 169         }
 170         emu_textOut16(x, y, text);
 171 }
 172
 173 /*
 174 void log1(void *p1, void *p2)
 175 {
 176         lprintf("%p %p %p\n", p1, p2, DrawLineDest);
 177 }
 178 */
 179
 180 short localPal[0x100];
 181 static void (*vidCpy8to16)(void *dest, void *src, short *pal, int lines) = NULL;
 182
 183 static void blit(const char *fps, const char *notice)
 184 {
 185         int emu_opt = currentConfig.EmuOpt;
 186
 187         if (PicoOpt&0x10) {
 188                 // 8bit fast renderer
 189                 if (Pico.m.dirtyPal) {
 190                         Pico.m.dirtyPal = 0;
 191                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 192                 }
 193                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, 224);
 194         } else if (!(emu_opt&0x80)) {
 195                 // 8bit accurate renderer
 196                 if (Pico.m.dirtyPal) {
 197                         Pico.m.dirtyPal = 0;
 198                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 199                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 200                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 201                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO
 202                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 203                                 localPal[0xc0] = 0x0600;
 204                                 localPal[0xd0] = 0xc000;
 205                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 206                                 localPal[0xf0] = 0xffff;
 207                         }
 208                         /* no support
 209                         else if (rendstatus & 0x20) { // mid-frame palette changes
 210                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 211                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 212                         } */
 213                 }
 214                 // TODO...
 215                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, 224);
 216         }
 217
 218         if (notice || (emu_opt & 2)) {
 219                 int h = 232;
 220                 if (notice)      osd_text(4, h, notice);
 221                 if (emu_opt & 2) osd_text(osd_fps_x, h, fps);
 222         }
 223 //      if ((emu_opt & 0x400) && (PicoMCD & 1))
 224 //              cd_leds();
 225
 226 }
 227
 228 // clears whole screen or just the notice area (in all buffers)
 229 static void clearArea(int full)
 230 {
 231         if (giz_screen == NULL)
 232                 giz_screen = Framework2D_LockBuffer();
 233         if (full) memset32(giz_screen, 0, 320*240*2/4);
 234         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 235 }
 236
 237 static void vidResetMode(void)
 238 {
 239         giz_screen = Framework2D_LockBuffer();
 240
 241         if (PicoOpt&0x10) {
 242         } else if (currentConfig.EmuOpt&0x80) {
 243                 PicoDrawSetColorFormat(1);
 244                 PicoScan = EmuScan16;
 245         } else {
 246                 PicoDrawSetColorFormat(-1);
 247                 PicoScan = EmuScan8;
 248         }
 249         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 250                 // setup pal for 8-bit modes
 251                 localPal[0xc0] = 0x0600;
 252                 localPal[0xd0] = 0xc000;
 253                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 254                 localPal[0xf0] = 0xffff;
 255         }
 256         Pico.m.dirtyPal = 1;
 257
 258         memset32(giz_screen, 0, 321*240*2/4);
 259         Framework2D_UnlockBuffer();
 260         giz_screen = NULL;
 261 }
 262
 263
 264 static void SkipFrame(int do_audio)
 265 {
 266         PicoSkipFrame=do_audio ? 1 : 2;
 267         PicoFrame();
 268         PicoSkipFrame=0;
 269 }
 270
 271 void emu_forcedFrame(void)
 272 {
 273         // TODO
 274 }
 275
 276 static void updateKeys(void)
 277 {
 278         unsigned int keys, allActions[2] = { 0, 0 }, events;
 279         static unsigned int prevEvents = 0;
 280         int i;
 281
 282         keys = Framework_PollGetButtons();
 283         if (keys & BTN_HOME) {
 284                 engineState = PGS_Menu;
 285                 // wait until select is released, so menu would not resume game
 286                 while (Framework_PollGetButtons() & BTN_HOME) Sleep(50);
 287         }
 288
 289         keys &= CONFIGURABLE_KEYS;
 290
 291         for (i = 0; i < 32; i++)
 292         {
 293                 if (keys & (1 << i)) {
 294                         int pl, acts = currentConfig.KeyBinds[i];
 295                         if (!acts) continue;
 296                         pl = (acts >> 16) & 1;
 297                         /* TODO if (combo_keys & (1 << i)) {
 298                                 int u = i+1, acts_c = acts & combo_acts;
 299                                 // let's try to find the other one
 300                                 if (acts_c)
 301                                         for (; u < 32; u++)
 302                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 303                                                         allActions[pl] |= acts_c;
 304                                                         keys &= ~((1 << i) | (1 << u));
 305                                                         break;
 306                                                 }
 307                                 // add non-combo actions if combo ones were not found
 308                                 if (!acts_c || u == 32)
 309                                         allActions[pl] |= acts & ~combo_acts;
 310                         } else */ {
 311                                 allActions[pl] |= acts;
 312                         }
 313                 }
 314         }
 315
 316         PicoPad[0] = (unsigned short) allActions[0];
 317         PicoPad[1] = (unsigned short) allActions[1];
 318
 319         events = (allActions[0] | allActions[1]) >> 16;
 320
 321         // volume is treated in special way and triggered every frame
 322         if (events & 0x6000) {
 323                 int vol = currentConfig.volume;
 324                 if (events & 0x2000) {
 325                         if (vol < 100) vol++;
 326                 } else {
 327                         if (vol >   0) vol--;
 328                 }
 329                 //gp2x_sound_volume(vol, vol);
 330                 sprintf(noticeMsg, "VOL: %02i", vol);
 331                 noticeMsgTime = GetTickCount();
 332                 currentConfig.volume = vol;
 333         }
 334
 335         events &= ~prevEvents;
 336         //if (events) RunEvents(events); // TODO
 337         if (movie_data) emu_updateMovie();
 338
 339         prevEvents = (allActions[0] | allActions[1]) >> 16;
 340 }
 341
 342 static void simpleWait(DWORD until)
 343 {
 344 }
 345
 346 void emu_Loop(void)
 347 {
 348         //static int PsndRate_old = 0, PicoOpt_old = 0, PsndLen_real = 0, pal_old = 0;
 349         char fpsbuff[24]; // fps count c string
 350         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 351         int frames_done = 0, frames_shown = 0, oldmodes = 0;
 352         int target_fps, target_frametime, lim_time, tval_diff, i;
 353         char *notice = NULL;
 354
 355         lprintf("entered emu_Loop()\n");
 356
 357         fpsbuff[0] = 0;
 358
 359         // make sure we are in correct mode
 360         vidResetMode();
 361         if (currentConfig.scaling) PicoOpt|=0x4000;
 362         else PicoOpt&=~0x4000;
 363         Pico.m.dirtyPal = 1;
 364         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 365         //find_combos(); // TODO
 366
 367         // pal/ntsc might have changed, reset related stuff
 368         target_fps = Pico.m.pal ? 50 : 60;
 369         target_frametime = (1000<<8)/target_fps;
 370         reset_timing = 1;
 371
 372         // prepare sound stuff
 373 /*      if (currentConfig.EmuOpt & 4) {
 374                 int snd_excess_add;
 375                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 376                         sound_rerate(Pico.m.frame_count ? 1 : 0);
 377                 }
 378                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 379                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 380                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);
 381                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);
 382                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);
 383                 PicoWriteSound = updateSound;
 384                 memset(sndBuffer, 0, sizeof(sndBuffer));
 385                 PsndOut = sndBuffer;
 386                 PsndRate_old = PsndRate;
 387                 PsndLen_real = PsndLen;
 388                 PicoOpt_old  = PicoOpt;
 389                 pal_old = Pico.m.pal;
 390         } else*/ {
 391                 PsndOut = 0;
 392         }
 393
 394         // prepare CD buffer
 395         if (PicoMCD & 1) PicoCDBufferInit();
 396
 397         // loop?
 398         while (engineState == PGS_Running)
 399         {
 400                 int modes;
 401
 402                 tval = GetTickCount();
 403                 if (reset_timing || tval < tval_prev) {
 404                         reset_timing = 0;
 405                         tval_thissec = tval;
 406                         frames_shown = frames_done = 0;
 407                 }
 408
 409                 // show notice message?
 410                 if (noticeMsgTime) {
 411                         static int noticeMsgSum;
 412                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 413                                 noticeMsgTime = 0;
 414                                 clearArea(0);
 415                                 notice = 0;
 416                         } else {
 417                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 418                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 419                                 notice = noticeMsg;
 420                         }
 421                 }
 422
 423                 // check for mode changes
 424                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 425                 if (modes != oldmodes) {
 426                         osd_fps_x = OSD_FPS_X;
 427                         //if (modes & 4)
 428                                 vidCpy8to16 = vidCpy8to16_40;
 429                         //else
 430                         //      vidCpy8to16 = vidCpy8to16_32col;
 431                         oldmodes = modes;
 432                         clearArea(1);
 433                 }
 434
 435                 // second passed?
 436                 if (tval - tval_thissec >= 1000)
 437                 {
 438 #ifdef BENCHMARK
 439                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 440                         if(++bench == 10) {
 441                                 bench = 0;
 442                                 bench_fps_s = bench_fps;
 443                                 bf[bfp++ & 3] = bench_fps;
 444                                 bench_fps = 0;
 445                         }
 446                         bench_fps += frames_shown;
 447                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 448 #else
 449                         if(currentConfig.EmuOpt & 2)
 450                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 451 #endif
 452                         tval_thissec = tval;
 453
 454                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {
 455                                 frames_done = frames_shown = 0;
 456                         } else {
 457                                 // it is quite common for this implementation to leave 1 fame unfinished
 458                                 // when second changes, but we don't want buffer to starve.
 459                                 if (PsndOut && frames_done < target_fps && frames_done > target_fps-5) {
 460                                         updateKeys();
 461                                         SkipFrame(1); frames_done++;
 462                                 }
 463
 464                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 465                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 466                                 if (frames_shown > frames_done) frames_shown = frames_done;
 467                         }
 468                 }
 469 #ifdef PFRAMES
 470                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 471 #endif
 472
 473                 tval_prev = tval;
 474                 lim_time = (frames_done+1) * target_frametime;
 475                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 476                 {
 477                         for (i = 0; i < currentConfig.Frameskip; i++) {
 478                                 updateKeys();
 479                                 SkipFrame(1); frames_done++;
 480                                 if (PsndOut) { // do framelimitting if sound is enabled
 481                                         int tval_diff;
 482                                         tval = GetTickCount();
 483                                         tval_diff = (int)(tval - tval_thissec) << 8;
 484                                         if (tval_diff < lim_time) // we are too fast
 485                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 486                                 }
 487                                 lim_time += target_frametime;
 488                         }
 489                 }
 490                 else // auto frameskip
 491                 {
 492                         int tval_diff;
 493                         tval = GetTickCount();
 494                         tval_diff = (int)(tval - tval_thissec) << 8;
 495                         if (tval_diff > lim_time)
 496                         {
 497                                 // no time left for this frame - skip
 498                                 if (tval_diff - lim_time >= (300<<8)) {
 499                                         /* something caused a slowdown for us (disk access? cache flush?)
 500                                          * try to recover by resetting timing... */
 501                                         reset_timing = 1;
 502                                         continue;
 503                                 }
 504                                 updateKeys();
 505                                 SkipFrame(tval_diff < lim_time+target_frametime*2); frames_done++;
 506                                 continue;
 507                         }
 508                 }
 509
 510                 updateKeys();
 511
 512                 if (giz_screen == NULL && (currentConfig.EmuOpt&0x80))
 513                         giz_screen = Framework2D_LockBuffer();
 514                 if (!(PicoOpt&0x10))
 515                         PicoScan((unsigned) -1, NULL);
 516
 517                 PicoFrame();
 518
 519                 if (giz_screen == NULL)
 520                         giz_screen = Framework2D_LockBuffer();
 521
 522                 blit(fpsbuff, notice);
 523
 524                 if (giz_screen != NULL) {
 525                         Framework2D_UnlockBuffer();
 526                         giz_screen = NULL;
 527                 }
 528                 //lprintf("after unlock\n");
 529
 530                 // check time
 531                 tval = GetTickCount();
 532                 tval_diff = (int)(tval - tval_thissec) << 8;
 533
 534                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 535                         reset_timing = 1;
 536                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 537                 {
 538                         // sleep if we are still too fast
 539                         if (tval_diff < lim_time)
 540                         {
 541                                 // we are too fast
 542                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 543                         }
 544                 }
 545
 546                 frames_done++; frames_shown++;
 547         }
 548
 549
 550         if (PicoMCD & 1) PicoCDBufferFree();
 551
 552         // save SRAM
 553         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 554                 emu_state_cb("Writing SRAM/BRAM..");
 555                 emu_SaveLoadGame(0, 1);
 556                 SRam.changed = 0;
 557         }
 558 }
 559
 560
 561 void emu_ResetGame(void)
 562 {
 563         PicoReset(0);
 564         reset_timing = 1;
 565 }
 566