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;
 164         int *p, i, h;
 165         len = (len+1) >> 1;
 166         for (h = 0; h < 8; h++) {
 167                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 168                 p = (int *) ((int)p & ~3); // align
 169                 for (i = len; i; i--, p++) *p = 0;
 170         }
 171         emu_textOut16(x, y, text);
 172 }
 173
 174
 175 short localPal[0x100];
 176 static void (*vidCpy8to16)(void *dest, void *src, short *pal, int lines) = NULL;
 177
 178 static void blit(const char *fps, const char *notice)
 179 {
 180         int emu_opt = currentConfig.EmuOpt;
 181
 182         if (PicoOpt&0x10) {
 183                 // 8bit fast renderer
 184                 if (Pico.m.dirtyPal) {
 185                         Pico.m.dirtyPal = 0;
 186                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 187                 }
 188                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, 224);
 189         } else if (!(emu_opt&0x80)) {
 190                 // 8bit accurate renderer
 191                 if (Pico.m.dirtyPal) {
 192                         Pico.m.dirtyPal = 0;
 193                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 194                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 195                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 196                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO
 197                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 198                                 localPal[0xc0] = 0x0600;
 199                                 localPal[0xd0] = 0xc000;
 200                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 201                                 localPal[0xf0] = 0xffff;
 202                         }
 203                         /* no support
 204                         else if (rendstatus & 0x20) { // mid-frame palette changes
 205                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 206                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 207                         } */
 208                 }
 209                 // TODO...
 210                 //lprintf("vidCpy8to16 %p %p\n", (unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8);
 211                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, 224);
 212                 //lprintf("after vidCpy8to16\n");
 213         }
 214
 215         if (notice || (emu_opt & 2)) {
 216                 int h = 232;
 217                 if (notice)      osd_text(4, h, notice);
 218                 if (emu_opt & 2) osd_text(osd_fps_x, h, fps);
 219         }
 220 //      if ((emu_opt & 0x400) && (PicoMCD & 1))
 221 //              cd_leds();
 222
 223         //gp2x_video_wait_vsync();
 224
 225         if (!(PicoOpt&0x10)) {
 226                 if (Pico.video.reg[1] & 8) {
 227                         if (currentConfig.EmuOpt&0x80)
 228                                 DrawLineDest = (unsigned short *) giz_screen;
 229                         else
 230                                 HighCol = gfx_buffer;
 231                 } else {
 232                         if (currentConfig.EmuOpt&0x80)
 233                                 DrawLineDest = (unsigned short *) giz_screen + 320*8;
 234                         else
 235                                 HighCol = gfx_buffer + 328*8;
 236                 }
 237         }
 238 }
 239
 240 // clears whole screen or just the notice area (in all buffers)
 241 static void clearArea(int full)
 242 {
 243         if (giz_screen == NULL)
 244                 giz_screen = Framework2D_LockBuffer();
 245         if (full) memset32(giz_screen, 0, 320*240*2/4);
 246         else      memset32((int *)((char *)giz_screen + 320*232*2), 0, 320*8*2/4);
 247 }
 248
 249 static void vidResetMode(void)
 250 {
 251         void *screen;
 252         if (PicoOpt&0x10) {
 253         } else if (currentConfig.EmuOpt&0x80) {
 254                 PicoDrawSetColorFormat(1);
 255                 PicoScan = EmuScan16;
 256         } else {
 257                 PicoDrawSetColorFormat(0);
 258                 PicoScan = EmuScan8;
 259         }
 260         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
 261                 // setup pal for 8-bit modes
 262                 localPal[0xc0] = 0x0600;
 263                 localPal[0xd0] = 0xc000;
 264                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 265                 localPal[0xf0] = 0xffff;
 266         }
 267         Pico.m.dirtyPal = 1;
 268         screen = Framework2D_LockBuffer();
 269         memset32(screen, 0, 320*240*2/4);
 270         Framework2D_UnlockBuffer();
 271         giz_screen = NULL;
 272 }
 273
 274
 275 static void SkipFrame(int do_audio)
 276 {
 277         PicoSkipFrame=do_audio ? 1 : 2;
 278         PicoFrame();
 279         PicoSkipFrame=0;
 280 }
 281
 282 void emu_forcedFrame(void)
 283 {
 284         // TODO
 285 }
 286
 287 static void updateKeys(void)
 288 {
 289         unsigned int keys, allActions[2] = { 0, 0 }, events;
 290         static unsigned int prevEvents = 0;
 291         int i;
 292
 293         keys = Framework_PollGetButtons();
 294         if (keys & BTN_HOME) {
 295                 engineState = PGS_Menu;
 296                 // wait until select is released, so menu would not resume game
 297                 while (Framework_PollGetButtons() & BTN_HOME) Sleep(50);
 298         }
 299
 300         keys &= CONFIGURABLE_KEYS;
 301
 302         for (i = 0; i < 32; i++)
 303         {
 304                 if (keys & (1 << i)) {
 305                         int pl, acts = currentConfig.KeyBinds[i];
 306                         if (!acts) continue;
 307                         pl = (acts >> 16) & 1;
 308                         /* TODO if (combo_keys & (1 << i)) {
 309                                 int u = i+1, acts_c = acts & combo_acts;
 310                                 // let's try to find the other one
 311                                 if (acts_c)
 312                                         for (; u < 32; u++)
 313                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 314                                                         allActions[pl] |= acts_c;
 315                                                         keys &= ~((1 << i) | (1 << u));
 316                                                         break;
 317                                                 }
 318                                 // add non-combo actions if combo ones were not found
 319                                 if (!acts_c || u == 32)
 320                                         allActions[pl] |= acts & ~combo_acts;
 321                         } else */ {
 322                                 allActions[pl] |= acts;
 323                         }
 324                 }
 325         }
 326
 327         PicoPad[0] = (unsigned short) allActions[0];
 328         PicoPad[1] = (unsigned short) allActions[1];
 329
 330         events = (allActions[0] | allActions[1]) >> 16;
 331
 332         // volume is treated in special way and triggered every frame
 333         if (events & 0x6000) {
 334                 int vol = currentConfig.volume;
 335                 if (events & 0x2000) {
 336                         if (vol < 100) vol++;
 337                 } else {
 338                         if (vol >   0) vol--;
 339                 }
 340                 //gp2x_sound_volume(vol, vol);
 341                 sprintf(noticeMsg, "VOL: %02i", vol);
 342                 noticeMsgTime = GetTickCount();
 343                 currentConfig.volume = vol;
 344         }
 345
 346         events &= ~prevEvents;
 347         //if (events) RunEvents(events); // TODO
 348         if (movie_data) emu_updateMovie();
 349
 350         prevEvents = (allActions[0] | allActions[1]) >> 16;
 351 }
 352
 353 static void simpleWait(DWORD until)
 354 {
 355 }
 356
 357 void emu_Loop(void)
 358 {
 359         //static int PsndRate_old = 0, PicoOpt_old = 0, PsndLen_real = 0, pal_old = 0;
 360         char fpsbuff[24]; // fps count c string
 361         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 362         int frames_done = 0, frames_shown = 0, oldmodes = 0;
 363         int target_fps, target_frametime, lim_time, tval_diff, i;
 364         char *notice = NULL;
 365
 366         lprintf("entered emu_Loop()\n");
 367
 368         fpsbuff[0] = 0;
 369
 370         // make sure we are in correct mode
 371         vidResetMode();
 372         if (currentConfig.scaling) PicoOpt|=0x4000;
 373         else PicoOpt&=~0x4000;
 374         Pico.m.dirtyPal = 1;
 375         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 376         //find_combos(); // TODO
 377
 378         // pal/ntsc might have changed, reset related stuff
 379         target_fps = Pico.m.pal ? 50 : 60;
 380         target_frametime = (1000<<8)/target_fps;
 381         reset_timing = 1;
 382
 383         // prepare sound stuff
 384 /*      if (currentConfig.EmuOpt & 4) {
 385                 int snd_excess_add;
 386                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 387                         sound_rerate(Pico.m.frame_count ? 1 : 0);
 388                 }
 389                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 390                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 391                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);
 392                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);
 393                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);
 394                 PicoWriteSound = updateSound;
 395                 memset(sndBuffer, 0, sizeof(sndBuffer));
 396                 PsndOut = sndBuffer;
 397                 PsndRate_old = PsndRate;
 398                 PsndLen_real = PsndLen;
 399                 PicoOpt_old  = PicoOpt;
 400                 pal_old = Pico.m.pal;
 401         } else*/ {
 402                 PsndOut = 0;
 403         }
 404
 405         // prepare CD buffer
 406         if (PicoMCD & 1) PicoCDBufferInit();
 407
 408         // loop?
 409         while (engineState == PGS_Running)
 410         {
 411                 int modes;
 412
 413                 tval = GetTickCount();
 414                 if (reset_timing || tval < tval_prev) {
 415                         reset_timing = 0;
 416                         tval_thissec = tval;
 417                         frames_shown = frames_done = 0;
 418                 }
 419
 420                 // show notice message?
 421                 if (noticeMsgTime) {
 422                         static int noticeMsgSum;
 423                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 424                                 noticeMsgTime = 0;
 425                                 clearArea(0);
 426                                 notice = 0;
 427                         } else {
 428                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 429                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 430                                 notice = noticeMsg;
 431                         }
 432                 }
 433
 434                 // check for mode changes
 435                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 436                 if (modes != oldmodes) {
 437                         osd_fps_x = OSD_FPS_X;
 438                         //if (modes & 4)
 439                                 vidCpy8to16 = vidCpy8to16_40;
 440                         //else
 441                         //      vidCpy8to16 = vidCpy8to16_32col;
 442                         oldmodes = modes;
 443                         clearArea(1);
 444                 }
 445
 446                 // second passed?
 447                 if (tval - tval_thissec >= 1000)
 448                 {
 449 #ifdef BENCHMARK
 450                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 451                         if(++bench == 10) {
 452                                 bench = 0;
 453                                 bench_fps_s = bench_fps;
 454                                 bf[bfp++ & 3] = bench_fps;
 455                                 bench_fps = 0;
 456                         }
 457                         bench_fps += frames_shown;
 458                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 459 #else
 460                         if(currentConfig.EmuOpt & 2)
 461                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 462 #endif
 463                         tval_thissec = tval;
 464
 465                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {
 466                                 frames_done = frames_shown = 0;
 467                         } else {
 468                                 // it is quite common for this implementation to leave 1 fame unfinished
 469                                 // when second changes, but we don't want buffer to starve.
 470                                 if (PsndOut && frames_done < target_fps && frames_done > target_fps-5) {
 471                                         updateKeys();
 472                                         SkipFrame(1); frames_done++;
 473                                 }
 474
 475                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 476                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 477                                 if (frames_shown > frames_done) frames_shown = frames_done;
 478                         }
 479                 }
 480 #ifdef PFRAMES
 481                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 482 #endif
 483
 484                 tval_prev = tval;
 485                 lim_time = (frames_done+1) * target_frametime;
 486                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 487                 {
 488                         for (i = 0; i < currentConfig.Frameskip; i++) {
 489                                 updateKeys();
 490                                 SkipFrame(1); frames_done++;
 491                                 if (PsndOut) { // do framelimitting if sound is enabled
 492                                         int tval_diff;
 493                                         tval = GetTickCount();
 494                                         tval_diff = (int)(tval - tval_thissec) << 8;
 495                                         if (tval_diff < lim_time) // we are too fast
 496                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 497                                 }
 498                                 lim_time += target_frametime;
 499                         }
 500                 }
 501                 else // auto frameskip
 502                 {
 503                         int tval_diff;
 504                         tval = GetTickCount();
 505                         tval_diff = (int)(tval - tval_thissec) << 8;
 506                         if (tval_diff > lim_time)
 507                         {
 508                                 // no time left for this frame - skip
 509                                 if (tval_diff - lim_time >= (300<<8)) {
 510                                         /* something caused a slowdown for us (disk access? cache flush?)
 511                                          * try to recover by resetting timing... */
 512                                         reset_timing = 1;
 513                                         continue;
 514                                 }
 515                                 updateKeys();
 516                                 SkipFrame(tval_diff < lim_time+target_frametime*2); frames_done++;
 517                                 continue;
 518                         }
 519                 }
 520
 521                 updateKeys();
 522
 523                 if (giz_screen == NULL)
 524                         giz_screen = Framework2D_LockBuffer();
 525
 526                 PicoFrame();
 527                 blit(fpsbuff, notice);
 528
 529                 if (giz_screen != NULL) {
 530                         Framework2D_UnlockBuffer();
 531                         giz_screen = NULL;
 532                 }
 533                 //lprintf("after unlock\n");
 534
 535                 // check time
 536                 tval = GetTickCount();
 537                 tval_diff = (int)(tval - tval_thissec) << 8;
 538
 539                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 540                         reset_timing = 1;
 541                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 542                 {
 543                         // sleep if we are still too fast
 544                         if (tval_diff < lim_time)
 545                         {
 546                                 // we are too fast
 547                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 548                         }
 549                 }
 550
 551                 frames_done++; frames_shown++;
 552         }
 553
 554
 555         if (PicoMCD & 1) PicoCDBufferFree();
 556
 557         // save SRAM
 558         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 559                 emu_state_cb("Writing SRAM/BRAM..");
 560                 emu_SaveLoadGame(0, 1);
 561                 SRam.changed = 0;
 562         }
 563 }
 564
 565
 566 void emu_ResetGame(void)
 567 {
 568         PicoReset(0);
 569         reset_timing = 1;
 570 }
 571