platform/pandora/emu.c

   1 // (c) Copyright 2006-2008 notaz, All rights reserved.\r
   2 // Free for non-commercial use.\r
   3 \r
   4 // For commercial use, separate licencing terms must be obtained.\r
   5 \r
   6 #include <stdio.h>\r
   7 #include <stdlib.h>\r
   8 #include <sys/time.h>\r
   9 #include <sys/stat.h>\r
  10 #include <sys/types.h>\r
  11 #include <linux/limits.h>\r
  12 #include <ctype.h>\r
  13 #include <unistd.h>\r
  14 \r
  15 #include <stdarg.h>\r
  16 \r
  17 #include "../common/arm_utils.h"\r
  18 #include "../common/fonts.h"\r
  19 #include "../common/emu.h"\r
  20 #include "../common/menu.h"\r
  21 #include "../common/config.h"\r
  22 #include "../common/input.h"\r
  23 #include "../linux/sndout_oss.h"\r
  24 #include "asm_utils.h"\r
  25 \r
  26 #include <pico/pico_int.h>\r
  27 #include <pico/patch.h>\r
  28 #include <pico/sound/mix.h>\r
  29 #include <zlib/zlib.h>\r
  30 \r
  31 //#define PFRAMES\r
  32 #define BENCHMARK\r
  33 //#define USE_320_SCREEN 1\r
  34 \r
  35 #ifdef BENCHMARK\r
  36 #define OSD_FPS_X (800-200)\r
  37 #else\r
  38 #define OSD_FPS_X (800-120)\r
  39 #endif\r
  40 \r
  41 \r
  42 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
  43 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  44 static int osd_fps_x;\r
  45 unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer\r
  46 int reset_timing = 0;\r
  47 \r
  48 #define PICO_PEN_ADJUST_X 4\r
  49 #define PICO_PEN_ADJUST_Y 2\r
  50 static int pico_pen_x = 0, pico_pen_y = 240/2;\r
  51 \r
  52 static void emu_msg_cb(const char *msg);\r
  53 static void emu_msg_tray_open(void);\r
  54 \r
  55 \r
  56 void plat_status_msg(const char *format, ...)\r
  57 {\r
  58         va_list vl;\r
  59 \r
  60         va_start(vl, format);\r
  61         vsnprintf(noticeMsg, sizeof(noticeMsg), fmt, vl);\r
  62         va_end(vl);\r
  63 \r
  64         gettimeofday(&noticeMsgTime, 0);\r
  65 }\r
  66 \r
  67 int emu_getMainDir(char *dst, int len)\r
  68 {\r
  69         extern char **g_argv;\r
  70         int j;\r
  71 \r
  72         strncpy(dst, g_argv[0], len);\r
  73         len -= 32; // reserve\r
  74         if (len < 0) len = 0;\r
  75         dst[len] = 0;\r
  76         for (j = strlen(dst); j > 0; j--)\r
  77                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  78 \r
  79         return j + 1;\r
  80 }\r
  81 \r
  82 void emu_Init(void)\r
  83 {\r
  84         // make temp buffer for alt renderer\r
  85         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  86         if (!PicoDraw2FB)\r
  87         {\r
  88                 printf("PicoDraw2FB == 0\n");\r
  89         }\r
  90 \r
  91         // make dirs for saves, cfgs, etc.\r
  92         mkdir("mds", 0777);\r
  93         mkdir("srm", 0777);\r
  94         mkdir("brm", 0777);\r
  95         mkdir("cfg", 0777);\r
  96 \r
  97         PicoInit();\r
  98         PicoMessage = emu_msg_cb;\r
  99         PicoMCDopenTray = emu_msg_tray_open;\r
 100         PicoMCDcloseTray = menu_loop_tray;\r
 101 }\r
 102 \r
 103 \r
 104 void emu_Deinit(void)\r
 105 {\r
 106         // save SRAM\r
 107         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 108                 emu_SaveLoadGame(0, 1);\r
 109                 SRam.changed = 0;\r
 110         }\r
 111 \r
 112         if (!(currentConfig.EmuOpt & 0x20)) {\r
 113                 config_writelrom(PicoConfigFile);\r
 114 #ifndef NO_SYNC\r
 115                 sync();\r
 116 #endif\r
 117         }\r
 118 \r
 119         free(PicoDraw2FB);\r
 120 \r
 121         PicoExit();\r
 122 }\r
 123 \r
 124 void emu_prepareDefaultConfig(void)\r
 125 {\r
 126         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
 127         defaultConfig.EmuOpt    = 0x8f | 0x00600; // | <- confirm_save, cd_leds\r
 128         defaultConfig.s_PicoOpt  = 0x0f | POPT_EXT_FM|POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC;\r
 129         defaultConfig.s_PicoOpt |= POPT_ACC_SPRITES|POPT_EN_MCD_GFX;\r
 130         defaultConfig.EmuOpt    &= ~8; // no save gzip\r
 131         defaultConfig.s_PsndRate = 44100;\r
 132         defaultConfig.s_PicoRegion = 0;\r
 133         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 134         defaultConfig.s_PicoCDBuffers = 0;\r
 135         defaultConfig.Frameskip = 0;\r
 136         defaultConfig.CPUclock = 200;\r
 137         defaultConfig.volume = 50;\r
 138         defaultConfig.scaling = 0;\r
 139         defaultConfig.turbo_rate = 15;\r
 140 }\r
 141 \r
 142 static void textOut16(int x, int y, const char *text)\r
 143 {\r
 144         int i,l,len=strlen(text);\r
 145         unsigned int *screen = (unsigned int *)((unsigned short *)g_screen_ptr + (x&~1) + y*g_screen_width);\r
 146 \r
 147         for (i = 0; i < len; i++)\r
 148         {\r
 149                 for (l=0;l<16;)\r
 150                 {\r
 151                         unsigned char fd = fontdata8x8[((text[i])*8)+l/2];\r
 152                         unsigned int *d = &screen[l*g_screen_width/2];\r
 153                         if (fd&0x80) d[0]=0xffffffff;\r
 154                         if (fd&0x40) d[1]=0xffffffff;\r
 155                         if (fd&0x20) d[2]=0xffffffff;\r
 156                         if (fd&0x10) d[3]=0xffffffff;\r
 157                         if (fd&0x08) d[4]=0xffffffff;\r
 158                         if (fd&0x04) d[5]=0xffffffff;\r
 159                         if (fd&0x02) d[6]=0xffffffff;\r
 160                         if (fd&0x01) d[7]=0xffffffff;\r
 161                         l++; d = &screen[l*g_screen_width/2];\r
 162                         if (fd&0x80) d[0]=0xffffffff;\r
 163                         if (fd&0x40) d[1]=0xffffffff;\r
 164                         if (fd&0x20) d[2]=0xffffffff;\r
 165                         if (fd&0x10) d[3]=0xffffffff;\r
 166                         if (fd&0x08) d[4]=0xffffffff;\r
 167                         if (fd&0x04) d[5]=0xffffffff;\r
 168                         if (fd&0x02) d[6]=0xffffffff;\r
 169                         if (fd&0x01) d[7]=0xffffffff;\r
 170                         l++;\r
 171                 }\r
 172                 screen += 8;\r
 173         }\r
 174 }\r
 175 \r
 176 \r
 177 static void osd_text(int x, int y, const char *text)\r
 178 {\r
 179         int len = strlen(text)*8;\r
 180 \r
 181         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 182                 int *p, i, h;\r
 183                 x &= ~3; // align x\r
 184                 len = (len+3) >> 2;\r
 185                 for (h = 0; h < 8; h++) {\r
 186                         p = (int *) ((unsigned char *) g_screen_ptr+x+g_screen_width*(y+h));\r
 187                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
 188                 }\r
 189                 emu_textOut8(x, y, text);\r
 190         } else {\r
 191                 int *p, i, h;\r
 192                 x &= ~1; // align x\r
 193                 len++;\r
 194                 for (h = 0; h < 16; h++) {\r
 195                         p = (int *) ((unsigned short *) g_screen_ptr+x+g_screen_width*(y+h));\r
 196                         for (i = len; i; i--, p++) *p = 0;//(*p>>2)&0x39e7;\r
 197                 }\r
 198                 textOut16(x, y, text);\r
 199         }\r
 200 }\r
 201 \r
 202 static void draw_cd_leds(void)\r
 203 {\r
 204 //      static\r
 205         int old_reg;\r
 206 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 207         old_reg = Pico_mcd->s68k_regs[0];\r
 208 \r
 209         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 210                 // 8-bit modes\r
 211                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 212                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 213                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*2+ 4) =\r
 214                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*3+ 4) =\r
 215                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*4+ 4) = col_g;\r
 216                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*2+12) =\r
 217                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*3+12) =\r
 218                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*4+12) = col_r;\r
 219         } else {\r
 220                 // 16-bit modes\r
 221                 unsigned int *p = (unsigned int *)((short *)g_screen_ptr + g_screen_width*2+4);\r
 222                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 223                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 224                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += g_screen_width/2 - 12/2;\r
 225                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += g_screen_width/2 - 12/2;\r
 226                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 227         }\r
 228 }\r
 229 \r
 230 static void draw_pico_ptr(void)\r
 231 {\r
 232         unsigned short *p = (unsigned short *)g_screen_ptr;\r
 233 \r
 234         // only if pen enabled and for 16bit modes\r
 235         if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;\r
 236 \r
 237         if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))\r
 238                 p += 32;\r
 239 \r
 240         p += g_screen_width * (pico_pen_y + PICO_PEN_ADJUST_Y);\r
 241         p += pico_pen_x + PICO_PEN_ADJUST_X;\r
 242         p[0]   ^= 0xffff;\r
 243         p[319] ^= 0xffff;\r
 244         p[320] ^= 0xffff;\r
 245         p[321] ^= 0xffff;\r
 246         p[640] ^= 0xffff;\r
 247 }\r
 248 \r
 249 #ifdef USE_320_SCREEN\r
 250 \r
 251 static int EmuScanBegin16(unsigned int num)\r
 252 {\r
 253         if (!(Pico.video.reg[1]&8)) num += 8;\r
 254         DrawLineDest = (unsigned short *)g_screen_ptr + num*800 + 800/2 - 320/2;\r
 255         //int w = (Pico.video.reg[12]&1) ? 320 : 256;\r
 256         //DrawLineDest = (unsigned short *)g_screen_ptr + num*w;\r
 257 \r
 258         return 0;\r
 259 }\r
 260 \r
 261 #else // USE_320_SCREEN\r
 262 \r
 263 static int EmuScanEnd16(unsigned int num)\r
 264 {\r
 265         unsigned char  *ps=HighCol+8;\r
 266         unsigned short *pd;\r
 267         unsigned short *pal=HighPal;\r
 268         int sh = Pico.video.reg[0xC]&8;\r
 269         int len, mask = 0xff;\r
 270 \r
 271         if (!(Pico.video.reg[1]&8)) num += 8;\r
 272         pd=(unsigned short *)g_screen_ptr + num*800*2 + 800/2 - 320*2/2;\r
 273 \r
 274         if (Pico.m.dirtyPal)\r
 275                 PicoDoHighPal555(sh);\r
 276 \r
 277         if (Pico.video.reg[12]&1) {\r
 278                 len = 320;\r
 279         } else {\r
 280                 pd += 32*2;\r
 281                 len = 256;\r
 282         }\r
 283 \r
 284         if (!sh && (rendstatus & PDRAW_SPR_LO_ON_HI))\r
 285                 mask=0x3f; // messed sprites, upper bits are priority stuff\r
 286 \r
 287 #if 1\r
 288         clut_line(pd, ps, pal, (mask<<16) | len);\r
 289 #else\r
 290         for (; len > 0; len--)\r
 291         {\r
 292                 unsigned int p = pal[*ps++ & mask];\r
 293                 p |= p << 16;\r
 294                 *(unsigned int *)pd = p;\r
 295                 *(unsigned int *)(&pd[800]) = p;\r
 296                 pd += 2;\r
 297         }\r
 298 #endif\r
 299 \r
 300         return 0;\r
 301 }\r
 302 \r
 303 #endif // USE_320_SCREEN\r
 304 \r
 305 int localPal[0x100];\r
 306 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 307 \r
 308 static void blit(const char *fps, const char *notice)\r
 309 {\r
 310         int emu_opt = currentConfig.EmuOpt;\r
 311 \r
 312         if (PicoOpt&0x10)\r
 313         {\r
 314                 // 8bit fast renderer\r
 315                 if (Pico.m.dirtyPal) {\r
 316                         Pico.m.dirtyPal = 0;\r
 317                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 318                         // feed new palette to our device\r
 319                         // gp2x_video_setpalette(localPal, 0x40);\r
 320                 }\r
 321                 // a hack for VR\r
 322                 if (PicoRead16Hook == PicoSVPRead16)\r
 323                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 324                 // do actual copy\r
 325                 vidCpyM2((unsigned char *)g_screen_ptr+g_screen_width*8, PicoDraw2FB+328*8);\r
 326         }\r
 327         else if (!(emu_opt&0x80))\r
 328         {\r
 329                 // 8bit accurate renderer\r
 330                 if (Pico.m.dirtyPal)\r
 331                 {\r
 332                         int pallen = 0xc0;\r
 333                         Pico.m.dirtyPal = 0;\r
 334                         if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
 335                         {\r
 336                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 337                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 338                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 339                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 340                                 pallen = 0x100;\r
 341                         }\r
 342                         else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
 343                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 344                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 345                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 346                                 pallen = 0xc0;\r
 347                         }\r
 348                         else {\r
 349                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 350                                 memcpy32(localPal+0x80, localPal, 0x40);\r
 351                         }\r
 352                         if (pallen > 0xc0) {\r
 353                                 localPal[0xc0] = 0x0000c000;\r
 354                                 localPal[0xd0] = 0x00c00000;\r
 355                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 356                                 localPal[0xf0] = 0x00ffffff;\r
 357                         }\r
 358                         // gp2x_video_setpalette(localPal, pallen);\r
 359                 }\r
 360         }\r
 361 \r
 362         if (notice || (emu_opt & 2)) {\r
 363                 int h = g_screen_height-16;\r
 364                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 16;\r
 365                 if (notice) osd_text(4, h, notice);\r
 366                 if (emu_opt & 2)\r
 367                         osd_text(osd_fps_x, h, fps);\r
 368         }\r
 369         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
 370                 draw_cd_leds();\r
 371         if (PicoAHW & PAHW_PICO)\r
 372                 draw_pico_ptr();\r
 373 \r
 374         //gp2x_video_wait_vsync();\r
 375         // gp2x_video_flip();\r
 376 }\r
 377 \r
 378 \r
 379 // clears whole screen or just the notice area (in all buffers)\r
 380 static void clearArea(int full)\r
 381 {\r
 382         if (full) memset(g_screen_ptr, 0, g_screen_width*g_screen_height*2);\r
 383         else      memset((short *)g_screen_ptr + g_screen_width * (g_screen_height - 16), 0,\r
 384                         g_screen_width * 16 * 2);\r
 385 }\r
 386 \r
 387 \r
 388 static void vidResetMode(void)\r
 389 {\r
 390 #if 0\r
 391         if (PicoOpt&0x10) {\r
 392                 gp2x_video_changemode(8);\r
 393         } else if (currentConfig.EmuOpt&0x80) {\r
 394                 gp2x_video_changemode(16);\r
 395 #ifdef USE_320_SCREEN\r
 396                 PicoDrawSetColorFormat(1);\r
 397                 PicoScanBegin = EmuScanBegin16;\r
 398 #else\r
 399                 PicoDrawSetColorFormat(-1);\r
 400                 PicoScanEnd = EmuScanEnd16;\r
 401 #endif\r
 402         } else {\r
 403                 gp2x_video_changemode(8);\r
 404                 PicoDrawSetColorFormat(2);\r
 405                 PicoScanBegin = EmuScanBegin8;\r
 406         }\r
 407         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 408                 // setup pal for 8-bit modes\r
 409                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 410                 localPal[0xd0] = 0x00c00000;\r
 411                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 412                 localPal[0xf0] = 0x00ffffff;\r
 413                 gp2x_video_setpalette(localPal, 0x100);\r
 414                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 415                 gp2x_video_flip();\r
 416         }\r
 417         Pico.m.dirtyPal = 1;\r
 418         // reset scaling\r
 419         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 420              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 421         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 422 #else\r
 423 #ifdef USE_320_SCREEN\r
 424         PicoDrawSetColorFormat(1);\r
 425         PicoScanBegin = EmuScanBegin16;\r
 426 #else\r
 427         PicoDrawSetColorFormat(-1);\r
 428         PicoScanEnd = EmuScanEnd16;\r
 429 #endif\r
 430 #endif\r
 431 }\r
 432 \r
 433 \r
 434 static void emu_msg_cb(const char *msg)\r
 435 {\r
 436 /*\r
 437         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 438                 // 8-bit renderers\r
 439                 gp2x_memset_all_buffers(g_screen_width*(g_screen_height-16), 0xe0, g_screen_width*16);\r
 440                 osd_text(4, g_screen_height-16, msg);\r
 441                 gp2x_memcpy_all_buffers((char *)g_screen_ptr+g_screen_width*(g_screen_height-16),\r
 442                         g_screen_width*(g_screen_height-16), g_screen_width*16);\r
 443         } else {\r
 444                 // 16bit accurate renderer\r
 445                 gp2x_memset_all_buffers(g_screen_width*(g_screen_height-16)*2, 0, g_screen_width*16*2);\r
 446                 osd_text(4, g_screen_height-16, msg);\r
 447                 gp2x_memcpy_all_buffers((char *)g_screen_ptr+g_screen_width*(g_screen_height-16)*2,\r
 448                         g_screen_width*(g_screen_height-16)*2, g_screen_width*16*2);\r
 449         }\r
 450         gettimeofday(&noticeMsgTime, 0);\r
 451         noticeMsgTime.tv_sec -= 2;\r
 452 */\r
 453         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 454         reset_timing = 1;\r
 455 }\r
 456 \r
 457 static void emu_state_cb(const char *str)\r
 458 {\r
 459         clearArea(0);\r
 460         blit("", str);\r
 461 }\r
 462 \r
 463 static void emu_msg_tray_open(void)\r
 464 {\r
 465         strcpy(noticeMsg, "CD tray opened");\r
 466         gettimeofday(&noticeMsgTime, 0);\r
 467 }\r
 468 \r
 469 \r
 470 static void update_volume(int has_changed, int is_up)\r
 471 {\r
 472         static int prev_frame = 0, wait_frames = 0;\r
 473         int vol = currentConfig.volume;\r
 474 \r
 475         if (has_changed)\r
 476         {\r
 477                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 478                         wait_frames++;\r
 479                 else {\r
 480                         if (is_up) {\r
 481                                 if (vol < 99) vol++;\r
 482                         } else {\r
 483                                 if (vol >  0) vol--;\r
 484                         }\r
 485                         wait_frames = 0;\r
 486                         sndout_oss_setvol(vol, vol);\r
 487                         currentConfig.volume = vol;\r
 488                 }\r
 489                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 490                 gettimeofday(&noticeMsgTime, 0);\r
 491                 prev_frame = Pico.m.frame_count;\r
 492         }\r
 493 \r
 494         // set the right mixer func\r
 495         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 496         if (vol >= 5)\r
 497                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 498         else {\r
 499                 mix_32_to_16l_level = 5 - vol;\r
 500                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 501         }\r
 502 }\r
 503 \r
 504 \r
 505 static void updateSound(int len)\r
 506 {\r
 507         if (PicoOpt&8) len<<=1;\r
 508 \r
 509         /* avoid writing audio when lagging behind to prevent audio lag */\r
 510         if (PicoSkipFrame != 2)\r
 511                 sndout_oss_write(PsndOut, len<<1);\r
 512 }\r
 513 \r
 514 \r
 515 static void SkipFrame(int do_audio)\r
 516 {\r
 517         PicoSkipFrame=do_audio ? 1 : 2;\r
 518         PicoFrame();\r
 519         PicoSkipFrame=0;\r
 520 }\r
 521 \r
 522 \r
 523 void emu_forcedFrame(int opts)\r
 524 {\r
 525         int po_old = PicoOpt;\r
 526         int eo_old = currentConfig.EmuOpt;\r
 527 \r
 528         PicoOpt &= ~0x10;\r
 529         PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
 530         currentConfig.EmuOpt |= 0x80;\r
 531 \r
 532         //vidResetMode();\r
 533 #ifdef USE_320_SCREEN\r
 534         PicoDrawSetColorFormat(1);\r
 535         PicoScanBegin = EmuScanBegin16;\r
 536 #else\r
 537         PicoDrawSetColorFormat(-1);\r
 538         PicoScanEnd = EmuScanEnd16;\r
 539 #endif\r
 540         Pico.m.dirtyPal = 1;\r
 541         PicoFrameDrawOnly();\r
 542 \r
 543 /*\r
 544         if (!(Pico.video.reg[12]&1)) {\r
 545                 vidCpyM2 = vidCpyM2_32col;\r
 546                 clearArea(1);\r
 547         } else  vidCpyM2 = vidCpyM2_40col;\r
 548 \r
 549         vidCpyM2((unsigned char *)g_screen_ptr+g_screen_width*8, PicoDraw2FB+328*8);\r
 550         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 551         gp2x_video_setpalette(localPal, 0x40);\r
 552 */\r
 553         PicoOpt = po_old;\r
 554         currentConfig.EmuOpt = eo_old;\r
 555 }\r
 556 \r
 557 void emu_platformDebugCat(char *str)\r
 558 {\r
 559         // nothing\r
 560 }\r
 561 \r
 562 static void simpleWait(int thissec, int lim_time)\r
 563 {\r
 564         struct timeval tval;\r
 565 \r
 566         spend_cycles(1024);\r
 567         gettimeofday(&tval, 0);\r
 568         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 569 \r
 570         while (tval.tv_usec < lim_time)\r
 571         {\r
 572                 spend_cycles(1024);\r
 573                 gettimeofday(&tval, 0);\r
 574                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 575         }\r
 576 }\r
 577 \r
 578 void emu_startSound(void)\r
 579 {\r
 580         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
 581         int target_fps = Pico.m.pal ? 50 : 60;\r
 582 \r
 583         PsndOut = NULL;\r
 584 \r
 585         if (currentConfig.EmuOpt & 4)\r
 586         {\r
 587                 int snd_excess_add;\r
 588                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old)\r
 589                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 590 \r
 591                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 592                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 593                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 594                 sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
 595                 sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
 596                 PicoWriteSound = updateSound;\r
 597                 update_volume(0, 0);\r
 598                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 599                 PsndOut = sndBuffer;\r
 600                 PsndRate_old = PsndRate;\r
 601                 PicoOpt_old  = PicoOpt;\r
 602                 pal_old = Pico.m.pal;\r
 603         }\r
 604 }\r
 605 \r
 606 void emu_endSound(void)\r
 607 {\r
 608 }\r
 609 \r
 610 /* wait until we can write more sound */\r
 611 void emu_waitSound(void)\r
 612 {\r
 613         // don't need to do anything, writes will block by themselves\r
 614 }\r
 615 \r
 616 void emu_Loop(void)\r
 617 {\r
 618         char fpsbuff[24]; // fps count c string\r
 619         struct timeval tval; // timing\r
 620         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 621         int  frames_done,  frames_shown,  thissec; // actual frames\r
 622         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 623         char *notice = 0;\r
 624 \r
 625         printf("entered emu_Loop()\n");\r
 626 \r
 627         fpsbuff[0] = 0;\r
 628 \r
 629         // make sure we are in correct mode\r
 630         vidResetMode();\r
 631         Pico.m.dirtyPal = 1;\r
 632         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 633 \r
 634         // pal/ntsc might have changed, reset related stuff\r
 635         target_fps = Pico.m.pal ? 50 : 60;\r
 636         target_frametime = 1000000/target_fps;\r
 637         reset_timing = 1;\r
 638 \r
 639         emu_startSound();\r
 640 \r
 641         // prepare CD buffer\r
 642         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
 643 \r
 644         // calc vsync offset to sync timing code with vsync\r
 645         if (currentConfig.EmuOpt&0x2000) {\r
 646                 gettimeofday(&tval, 0);\r
 647                 //gp2x_video_wait_vsync();\r
 648                 gettimeofday(&tval, 0);\r
 649                 vsync_offset = tval.tv_usec;\r
 650                 while (vsync_offset >= target_frametime)\r
 651                         vsync_offset -= target_frametime;\r
 652                 if (!vsync_offset) vsync_offset++;\r
 653                 printf("vsync_offset: %i\n", vsync_offset);\r
 654         } else\r
 655                 vsync_offset = 0;\r
 656 \r
 657         frames_done = frames_shown = thissec =\r
 658         pframes_done = pframes_shown = pthissec = 0;\r
 659 \r
 660         // loop\r
 661         while (engineState == PGS_Running)\r
 662         {\r
 663                 int modes;\r
 664 \r
 665                 gettimeofday(&tval, 0);\r
 666                 if (reset_timing) {\r
 667                         reset_timing = 0;\r
 668                         pthissec = tval.tv_sec;\r
 669                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 670                 }\r
 671 \r
 672                 // show notice message?\r
 673                 if (noticeMsgTime.tv_sec)\r
 674                 {\r
 675                         static int noticeMsgSum;\r
 676                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 677                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 678                                 clearArea(0);\r
 679                                 notice = 0;\r
 680                         } else {\r
 681                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 682                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 683                                 notice = noticeMsg;\r
 684                         }\r
 685                 }\r
 686 \r
 687                 // check for mode changes\r
 688                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 689                 if (modes != oldmodes)\r
 690                 {\r
 691                         int scalex = g_screen_width;\r
 692                         osd_fps_x = OSD_FPS_X;\r
 693                         if (modes & 4) {\r
 694                                 vidCpyM2 = vidCpyM2_40col;\r
 695                         } else {\r
 696                                 if (PicoOpt & 0x100) {\r
 697                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 698                                         scalex = 256;\r
 699                                         osd_fps_x = OSD_FPS_X - 64;\r
 700                                 } else {\r
 701                                         vidCpyM2 = vidCpyM2_32col;\r
 702                                 }\r
 703                         }\r
 704                         //if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 705                         //      gp2x_video_RGB_setscaling(8, scalex, 224);\r
 706                         // else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 707                         oldmodes = modes;\r
 708                         clearArea(1);\r
 709                 }\r
 710 \r
 711                 // second changed?\r
 712                 if (thissec != tval.tv_sec)\r
 713                 {\r
 714 #ifdef BENCHMARK\r
 715                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 716                         if (++bench == 4) {\r
 717                                 bench = 0;\r
 718                                 bench_fps_s = bench_fps / 4;\r
 719                                 bf[bfp++ & 3] = bench_fps / 4;\r
 720                                 bench_fps = 0;\r
 721                         }\r
 722                         bench_fps += frames_shown;\r
 723                         sprintf(fpsbuff, "%3i/%3i/%3i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 724                         printf("%s\n", fpsbuff);\r
 725 #else\r
 726                         if (currentConfig.EmuOpt & 2) {\r
 727                                 sprintf(fpsbuff, "%3i/%3i", frames_shown, frames_done);\r
 728                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 729                         }\r
 730 #endif\r
 731                         frames_shown = frames_done = 0;\r
 732                         thissec = tval.tv_sec;\r
 733                 }\r
 734 #ifdef PFRAMES\r
 735                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 736 #endif\r
 737 \r
 738                 if (pthissec != tval.tv_sec)\r
 739                 {\r
 740                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 741                                 pframes_done = pframes_shown = 0;\r
 742                         } else {\r
 743                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 744                                 // when second changes, but we don't want buffer to starve.\r
 745                                 if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 746                                         emu_update_input();\r
 747                                         SkipFrame(1); pframes_done++;\r
 748                                 }\r
 749 \r
 750                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 751                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 752                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 753                         }\r
 754                         pthissec = tval.tv_sec;\r
 755                 }\r
 756 \r
 757                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 758                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 759                 {\r
 760                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 761                                 emu_update_input();\r
 762                                 SkipFrame(1); pframes_done++; frames_done++;\r
 763                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 764                                         gettimeofday(&tval, 0);\r
 765                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 766                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 767                                                 simpleWait(pthissec, lim_time);\r
 768                                         }\r
 769                                 }\r
 770                                 lim_time += target_frametime;\r
 771                         }\r
 772                 }\r
 773                 else if (tval.tv_usec > lim_time) // auto frameskip\r
 774                 {\r
 775                         // no time left for this frame - skip\r
 776                         if (tval.tv_usec - lim_time >= 300000) {\r
 777                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 778                                  * try to recover by resetting timing... */\r
 779                                 reset_timing = 1;\r
 780                                 continue;\r
 781                         }\r
 782                         emu_update_input();\r
 783                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
 784                         continue;\r
 785                 }\r
 786 \r
 787                 emu_update_input();\r
 788                 PicoFrame();\r
 789 \r
 790                 // check time\r
 791                 gettimeofday(&tval, 0);\r
 792                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 793 \r
 794                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 795                         reset_timing = 1;\r
 796 #if 1\r
 797                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 798                 {\r
 799                         // sleep or vsync if we are still too fast\r
 800                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 801                         if (!reset_timing && tval.tv_usec < lim_time)\r
 802                         {\r
 803                                 // we are too fast\r
 804                                 if (vsync_offset) {\r
 805                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 806                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
 807                                         // gp2x_video_wait_vsync();\r
 808                                 } else {\r
 809                                         simpleWait(pthissec, lim_time);\r
 810                                 }\r
 811                         }\r
 812                 }\r
 813 #endif\r
 814                 blit(fpsbuff, notice);\r
 815 \r
 816                 pframes_done++; pframes_shown++;\r
 817                  frames_done++;  frames_shown++;\r
 818         }\r
 819 \r
 820         emu_changeFastForward(0);\r
 821 \r
 822         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();\r
 823 \r
 824         // save SRAM\r
 825         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 826                 emu_state_cb("Writing SRAM/BRAM..");\r
 827                 emu_SaveLoadGame(0, 1);\r
 828                 SRam.changed = 0;\r
 829         }\r
 830 \r
 831         // if in 8bit mode, generate 16bit image for menu background\r
 832         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
 833                 emu_forcedFrame(POPT_EN_SOFTSCALE);\r
 834 }\r
 835 \r
 836 \r
 837 void emu_ResetGame(void)\r
 838 {\r
 839         PicoReset();\r
 840         reset_timing = 1;\r
 841 }\r
 842 \r