Shamusworld >> Repos - virtualjaguar/blob - src/vj.cpp

   1 //
   2 // Virtual Jaguar Emulator
   3 //
   4 // Original codebase by Cal2
   5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
   6 // Cleanups/fixes/enhancements by James L. Hammons and Adam Green
   7 //
   8
   9 #ifdef __GCCUNIX__
  10 #include <unistd.h>
  11 #endif
  12
  13 #include <dirent.h>                                                                     // POSIX, but should compile with linux & mingw...
  14 #include <time.h>
  15 #include <SDL.h>
  16 #include "jaguar.h"
  17 #include "crc32.h"
  18 #include "zlib.h"
  19 #include "unzip.h"
  20 #include "video.h"
  21 #include "gui.h"
  22 #include "sdlemu_opengl.h"
  23 #include "settings.h"                                                           // Pull in "vjs" struct
  24
  25 // Uncomment this for speed control (?)
  26 //#define SPEED_CONTROL
  27
  28 // Private function prototypes
  29
  30 uint32 JaguarLoadROM(uint8 *, char *);
  31 void JaguarLoadCart(uint8 *, char *);
  32 int gzfilelength(gzFile gd);
  33
  34 // External variables
  35
  36 extern uint8 * jaguar_mainRam;
  37 extern uint8 * jaguar_bootRom;
  38 extern uint8 * jaguar_mainRom;
  39
  40 // Various paths
  41
  42 //static char * jaguar_bootRom_path = "./bios/jagboot.rom";
  43 //static char  *jaguar_bootRom_path="c:/jaguarEmu/newload.img";
  44 //static char  *jaguar_bootRom_path="./bios/JagOS.bin";
  45 //char * jaguar_eeproms_path = "./eeproms/";
  46 //char jaguar_boot_dir[MAX_PATH];
  47
  48 //These should go into video.cpp...
  49 SDL_Surface * surface, * mainSurface;
  50 int16 * backbuffer = NULL;
  51 SDL_Joystick * joystick;
  52 Uint32 mainSurfaceFlags = SDL_SWSURFACE;
  53
  54 bool finished = false;
  55 bool showGUI = false;
  56 bool showMessage = false;
  57 uint32 showMessageTimeout;
  58 char messageBuffer[200];
  59
  60 //
  61 // The main emulator loop (what else?)
  62 //
  63 //Maybe we should move the video stuff to TOM? Makes more sense to put it there...
  64 //Actually, it would probably be better served in VIDEO.CPP... !!! FIX !!! [DONE]
  65 uint32 totalFrames;//temp, so we can grab this from elsewhere...
  66 int main(int argc, char * argv[])
  67 {
  68         uint32 startTime;//, totalFrames;//, endTime;//, w, h;
  69         uint32 nNormalLast = 0;
  70         int32 nNormalFrac = 0;
  71     int32 nFrameskip = 0;                                                       // Default: Show every frame
  72     int32 nFrame = 0;                                                           // No. of Frame
  73
  74         printf("Virtual Jaguar GCC/SDL Portable Jaguar Emulator v1.0.6\n");
  75         printf("Based upon Virtual Jaguar core v1.0.0 by Cal2 of Potato emulation.\n");
  76         printf("Written by Niels Wagenaar (Linux/WIN32), Caz (BeOS),\n");
  77         printf("James L. Hammons (WIN32) and Adam Green (MacOS)\n");
  78         printf("Contact: http://sdlemu.ngemu.com/ | sdlemu@ngemu.com\n");
  79
  80         bool haveCart = false;                                                  // Assume there is no cartridge...!
  81
  82         log_init("vj.log");
  83         LoadVJSettings();                                                               // Get config file settings...
  84
  85         // Check the switches... ;-)
  86         // NOTE: Command line switches can override any config file settings, thus the
  87         //       proliferation of the noXXX switches. ;-)
  88
  89         for(int i=1; i<argc || argv[i]!=NULL; i++)
  90         {
  91                 // This would be the most likely place to do the cart loading...
  92                 if (argv[i][0] != '-')
  93                         haveCart = true;                                                // It looks like we have a cartridge!
  94
  95                 if (!strcmp(argv[i], "-joystick"))
  96                         vjs.useJoystick = true;
  97
  98                 if (!strcmp(argv[i], "-joyport"))
  99                 {
 100                         vjs.joyport = atoi(argv[++i]) + 1;
 101                         if (vjs.joyport > 3)
 102                                 vjs.joyport = 3;
 103                 }
 104
 105                 if (!strcmp(argv[i], "-frameskip"))
 106                 {
 107                         nFrameskip = atoi(argv[++i]) + 1;
 108                         if (nFrameskip > 10)
 109                                 nFrameskip = 10;
 110 #ifdef SPEED_CONTROL
 111                         nFrameskip = 0;
 112 #endif
 113                 }
 114
 115                 if (!strcmp(argv[i], "-bios"))
 116                         vjs.useJaguarBIOS = true;
 117
 118                 if (!strcmp(argv[i], "-nobios"))
 119                         vjs.useJaguarBIOS = false;
 120
 121                 if (!strcmp(argv[i], "-dsp"))
 122                         vjs.DSPEnabled = true;
 123
 124                 if (!strcmp(argv[i], "-nodsp"))
 125                         vjs.DSPEnabled = false;
 126
 127                 if (!strcmp(argv[i], "-gl"))
 128                         vjs.useOpenGL = true;
 129
 130                 if (!strcmp(argv[i], "-nogl"))
 131                         vjs.useOpenGL = false;
 132
 133                 if (!strcmp(argv[i], "-fullscreen"))
 134                         vjs.fullscreen = true;
 135
 136                 if (!strcmp(argv[i], "-window"))
 137                         vjs.fullscreen = false;
 138
 139                 if (!strcmp(argv[i], "-pal"))
 140                         vjs.hardwareTypeNTSC = false;
 141
 142                 if (!strcmp(argv[i], "-ntsc"))
 143                         vjs.hardwareTypeNTSC = true;
 144
 145                 if (!strcmp(argv[i], "-help") || !strcmp(argv[i], "-?"))
 146                 {
 147                     printf("Usage: \n\n");
 148                         printf("vj [romfile] [switches]\n");
 149                         printf("  -? or -help     : Display usage and switches                \n");
 150                         printf("  -frameskip 1-10 : Enable frameskip 1 - 10 (default: none)   \n");
 151                         printf("  -joystick       : Enable joystick/gamepad                   \n");
 152                         printf("  -joyport 0-3    : Select desired joystick port              \n");
 153                         printf("  -bios           : Boot cart using Jaguar BIOS ROM           \n");
 154                         printf("  -nobios         : Boot cart without using Jaguar BIOS ROM   \n");
 155                         printf("  -dsp            : Force VJ to use the DSP                   \n");
 156                         printf("  -nodsp          : Force VJ to run without the DSP           \n");
 157                         printf("  -gl             : Use OpenGL rendering                      \n");
 158                         printf("  -nogl           : Use old non-OpenGL rendering              \n");
 159                         printf("  -fullscreen     : Enable fullscreen mode (default: windowed)\n");
 160                         printf("  -window         : Enable windowed mode                      \n");
 161                         printf("  -pal            : Force VJ to PAL mode (default: NTSC)      \n");
 162                         printf("  -ntsc           : Force VJ to NTSC mode                     \n");
 163                         printf("\nInvoking Virtual Jagaur with no ROM file will cause it to boot up\n");
 164                         printf("with the Jaguar BIOS.\n");
 165                         return 1;
 166                 }
 167     }
 168
 169 //      getcwd(jaguar_boot_dir, 1024);
 170         memory_init();
 171         version_init();
 172         version_display(log_get());
 173         jaguar_init();
 174
 175         // Get the BIOS ROM
 176         if (vjs.useJaguarBIOS)
 177                 JaguarLoadROM(jaguar_bootRom, vjs.jagBootPath);
 178
 179         SET32(jaguar_mainRam, 0, 0x00200000);                   // Set top of stack...
 180
 181         // Set up the backbuffer
 182 //To be safe, this should be 1280 * 625 * 2...
 183 //      backbuffer = (int16 *)malloc(845 * 525 * sizeof(int16));
 184         backbuffer = (int16 *)malloc(1280 * 625 * sizeof(int16));
 185         memset(backbuffer, 0x44, VIRTUAL_SCREEN_WIDTH * VIRTUAL_SCREEN_HEIGHT * sizeof(int16));
 186
 187         InitVideo();
 188         InitGUI();
 189
 190         // Get the cartridge ROM (if passed in)
 191         // Now with crunchy GUI goodness!
 192 //      JaguarLoadCart(jaguar_mainRom, (haveCart ? argv[1] : (char *)""));
 193         JaguarLoadCart(jaguar_mainRom, (haveCart ? argv[1] : vjs.ROMPath));
 194
 195         jaguar_reset();
 196
 197         totalFrames = 0;
 198         startTime = clock();
 199         nNormalLast = 0;                                                                        // Last value of timeGetTime()
 200         nNormalFrac = 0;                                                                        // Extra fraction we did
 201         nNormalLast = SDL_GetTicks();                                           //timeGetTime();
 202
 203         while (!finished)
 204         {
 205 #ifdef SPEED_CONTROL
 206                 nTime = SDL_GetTicks() - nNormalLast;                   // calcule le temps écoulé depuis le dernier affichage
 207                                                                                                                 // nTime est en mili-secondes.
 208                 // détermine le nombre de trames à passer + 1
 209                 nCount = (nTime * 600 - nNormalFrac) / 10000;
 210
 211                 // si le nombre de trames à passer + 1 est nul ou négatif,
 212                 // ne rien faire pendant 2 ms
 213                 if (nCount <= 0)
 214                 {
 215                         //Sleep(2);
 216                         //SDL_Delay(1);
 217                 } // No need to do anything for a bit
 218                 else
 219                 {
 220                         nNormalFrac += nCount * 10000;                          //
 221                         nNormalLast += nNormalFrac / 600;                       // add the duration of nNormalFrac frames
 222                         nNormalFrac %= 600;                                                     //
 223
 224                         // Pas plus de 9 (10-1) trames non affichées
 225                         if (nCount > 10)
 226                                 nCount = 10;
 227                         for(int i=0; i<nCount-1; i++)
 228                                 jaguar_exec(backbuffer, false);
 229 #endif
 230             // Set up new backbuffer with new pixels and data
 231                         JaguarExecute(backbuffer, true);
 232                         totalFrames++;
 233
 234                         // Some QnD GUI stuff here...
 235                         if (showGUI)
 236                         {
 237                                 extern uint32 gpu_pc, dsp_pc;
 238                                 DrawString(backbuffer, 8, 8, false, "GPU PC: %08X", gpu_pc);
 239                                 DrawString(backbuffer, 8, 16, false, "DSP PC: %08X", dsp_pc);
 240                         }
 241
 242                         // Simple frameskip
 243                         if (nFrame == nFrameskip)
 244                         {
 245                                 RenderBackbuffer();
 246                                 nFrame = 0;
 247                         }
 248                         else
 249                                 nFrame++;
 250
 251                         joystick_exec();
 252
 253 #ifdef SPEED_CONTROL
 254                 }
 255 #endif
 256         }
 257
 258         int elapsedTime = clock() - startTime;
 259         int fps = (1000 * totalFrames) / elapsedTime;
 260         WriteLog("VJ: Ran at an average of %i FPS.\n", fps);
 261
 262         jaguar_done();
 263         version_done();
 264         memory_done();
 265         VideoDone();                                                                    // Free SDL components last...!
 266         log_done();
 267
 268     return 0;
 269 }
 270
 271 //
 272 // Generic ROM loading
 273 //
 274 uint32 JaguarLoadROM(uint8 * rom, char * path)
 275 {
 276         uint32 romSize = 0;
 277
 278         char * ext = strrchr(path, '.');
 279         if (ext != NULL)
 280         {
 281                 WriteLog("VJ: Loading %s...", path);
 282
 283                 if (stricmp(ext, ".zip") == 0)
 284                 {
 285                         // Handle ZIP file loading here...
 286                         WriteLog("(ZIPped)...");
 287
 288                         if (load_zipped_file(0, 0, path, NULL, &rom, &romSize) == -1)
 289                         {
 290                                 WriteLog("Failed!\n");
 291                                 return 0;
 292                         }
 293                 }
 294                 else
 295                 {
 296 /*                      FILE * fp = fopen(path, "rb");
 297
 298                         if (fp == NULL)
 299                         {
 300                                 WriteLog("Failed!\n");
 301                                 return 0;
 302                         }
 303
 304                         fseek(fp, 0, SEEK_END);
 305                         romSize = ftell(fp);
 306                         fseek(fp, 0, SEEK_SET);
 307                         fread(rom, 1, romSize, fp);
 308                         fclose(fp);*/
 309
 310                         gzFile fp = gzopen(path, "rb");
 311
 312                         if (fp == NULL)
 313                         {
 314                                 WriteLog("Failed!\n");
 315                                 return 0;
 316                         }
 317
 318                         romSize = gzfilelength(fp);
 319                         gzseek(fp, 0, SEEK_SET);
 320                         gzread(fp, rom, romSize);
 321                         gzclose(fp);
 322                 }
 323
 324                 WriteLog("OK (%i bytes)\n", romSize);
 325         }
 326
 327         return romSize;
 328 }
 329
 330 //
 331 // Jaguar cartridge ROM loading
 332 //
 333 void JaguarLoadCart(uint8 * mem, char * path)
 334 {
 335         uint32 romSize = JaguarLoadROM(mem, path);
 336
 337         if (romSize == 0)
 338         {
 339                 char newPath[2048];
 340                 WriteLog("VJ: Trying GUI...\n");
 341
 342 //This is not *nix friendly for some reason...
 343 //              if (!UserSelectFile(path, newPath))
 344                 if (!UserSelectFile((strlen(path) == 0 ? (char *)"." : path), newPath))
 345                 {
 346                         WriteLog("VJ: Could not find valid ROM in directory \"%s\"...\nAborting!\n", path);
 347                         log_done();
 348                         exit(0);
 349                 }
 350
 351                 romSize = JaguarLoadROM(mem, newPath);
 352
 353                 if (romSize == 0)
 354                 {
 355                         WriteLog("VJ: Could not load ROM from file \"%s\"...\nAborting!\n", newPath);
 356                         log_done();
 357                         exit(0);
 358                 }
 359         }
 360
 361         jaguar_mainRom_crc32 = crc32_calcCheckSum(jaguar_mainRom, romSize);
 362         WriteLog("CRC: %08X\n", (unsigned int)jaguar_mainRom_crc32);
 363         eeprom_init();
 364 }
 365
 366 //
 367 // Get the length of a (possibly) gzipped file
 368 //
 369 int gzfilelength(gzFile gd)
 370 {
 371    int size = 0, length = 0;
 372    unsigned char buffer[0x10000];
 373
 374    gzrewind(gd);
 375
 376    do
 377    {
 378       // Read in chunks until EOF
 379       size = gzread(gd, buffer, 0x10000);
 380
 381       if (size <= 0)
 382         break;
 383
 384       length += size;
 385    }
 386    while (!gzeof(gd));
 387
 388    gzrewind(gd);
 389    return length;
 390 }