gp2x/emu.c

   1 // (c) Copyright 2006-2009 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 <stdarg.h>\r
  12 \r
  13 #include "plat_gp2x.h"\r
  14 #include "soc.h"\r
  15 #include "../common/plat.h"\r
  16 #include "../common/menu.h"\r
  17 #include "../common/arm_utils.h"\r
  18 #include "../common/fonts.h"\r
  19 #include "../common/emu.h"\r
  20 #include "../common/config.h"\r
  21 #include "../linux/sndout_oss.h"\r
  22 #include "version.h"\r
  23 \r
  24 #include <pico/pico_int.h>\r
  25 #include <pico/patch.h>\r
  26 #include <pico/sound/mix.h>\r
  27 #include <zlib/zlib.h>\r
  28 \r
  29 //#define PFRAMES\r
  30 \r
  31 #ifdef BENCHMARK\r
  32 #define OSD_FPS_X 220\r
  33 #else\r
  34 #define OSD_FPS_X 260\r
  35 #endif\r
  36 \r
  37 \r
  38 extern int crashed_940;\r
  39 \r
  40 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
  41 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  42 static int osd_fps_x;\r
  43 static int gp2x_old_gamma = 100;\r
  44 static char noticeMsg[40];\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 = 320/2, pico_pen_y = 240/2;\r
  51 \r
  52 static void emu_msg_tray_open(void);\r
  53 \r
  54 \r
  55 void plat_status_msg(const char *format, ...)\r
  56 {\r
  57         va_list vl;\r
  58 \r
  59         va_start(vl, format);\r
  60         vsnprintf(noticeMsg, sizeof(noticeMsg), format, vl);\r
  61         va_end(vl);\r
  62 \r
  63         gettimeofday(&noticeMsgTime, 0);\r
  64 }\r
  65 \r
  66 int emu_getMainDir(char *dst, int len)\r
  67 {\r
  68         extern char **g_argv;\r
  69         int j;\r
  70 \r
  71         strncpy(dst, g_argv[0], len);\r
  72         len -= 32; // reserve\r
  73         if (len < 0) len = 0;\r
  74         dst[len] = 0;\r
  75         for (j = strlen(dst); j > 0; j--)\r
  76                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  77 \r
  78         return j + 1;\r
  79 }\r
  80 \r
  81 void emu_Init(void)\r
  82 {\r
  83         // make temp buffer for alt renderer\r
  84         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  85         if (!PicoDraw2FB)\r
  86         {\r
  87                 printf("PicoDraw2FB == 0\n");\r
  88         }\r
  89 \r
  90         // make dirs for saves, cfgs, etc.\r
  91         mkdir("mds", 0777);\r
  92         mkdir("srm", 0777);\r
  93         mkdir("brm", 0777);\r
  94         mkdir("cfg", 0777);\r
  95 \r
  96         PicoInit();\r
  97         PicoMessage = plat_status_msg_busy_next;\r
  98         PicoMCDopenTray = emu_msg_tray_open;\r
  99         PicoMCDcloseTray = menu_loop_tray;\r
 100 }\r
 101 \r
 102 \r
 103 static void scaling_update(void)\r
 104 {\r
 105         PicoOpt &= ~(POPT_DIS_32C_BORDER|POPT_EN_SOFTSCALE);\r
 106         switch (currentConfig.scaling) {\r
 107                 default:break;\r
 108                 case EOPT_SCALE_HW_H:\r
 109                 case EOPT_SCALE_HW_HV:\r
 110                         PicoOpt |= POPT_DIS_32C_BORDER;\r
 111                         break;\r
 112                 case EOPT_SCALE_SW_H:\r
 113                         PicoOpt |= POPT_EN_SOFTSCALE;\r
 114                         break;\r
 115         }\r
 116 }\r
 117 \r
 118 \r
 119 void emu_Deinit(void)\r
 120 {\r
 121         // save SRAM\r
 122         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 123                 emu_SaveLoadGame(0, 1);\r
 124                 SRam.changed = 0;\r
 125         }\r
 126 \r
 127         if (!(currentConfig.EmuOpt & EOPT_NO_AUTOSVCFG))\r
 128                 emu_writelrom();\r
 129 \r
 130         free(PicoDraw2FB);\r
 131 \r
 132         PicoExit();\r
 133 \r
 134         // restore gamma\r
 135         if (gp2x_old_gamma != 100)\r
 136                 set_lcd_gamma(100, 0);\r
 137 }\r
 138 \r
 139 void emu_prepareDefaultConfig(void)\r
 140 {\r
 141         gp2x_soc_t soc;\r
 142 \r
 143         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
 144         defaultConfig.EmuOpt    = 0x9d | EOPT_RAM_TIMINGS | 0x600; // | <- confirm_save, cd_leds\r
 145         defaultConfig.s_PicoOpt = 0x0f | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;\r
 146         defaultConfig.s_PsndRate = 44100;\r
 147         defaultConfig.s_PicoRegion = 0; // auto\r
 148         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 149         defaultConfig.s_PicoCDBuffers = 0;\r
 150         defaultConfig.Frameskip = -1; // auto\r
 151         defaultConfig.CPUclock = default_cpu_clock;\r
 152         defaultConfig.volume = 50;\r
 153         defaultConfig.gamma = 100;\r
 154         defaultConfig.scaling = 0;\r
 155         defaultConfig.turbo_rate = 15;\r
 156 \r
 157         soc = soc_detect();\r
 158         if (soc == SOCID_MMSP2)\r
 159                 defaultConfig.s_PicoOpt |= POPT_EXT_FM;\r
 160 }\r
 161 \r
 162 static void osd_text(int x, int y, const char *text)\r
 163 {\r
 164         int len = strlen(text)*8;\r
 165         int *p, i, h, offs;\r
 166 \r
 167         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 168                 len = (len+3) >> 2;\r
 169                 for (h = 0; h < 8; h++) {\r
 170                         offs = (x + g_screen_width * (y+h)) & ~3;\r
 171                         p = (int *) ((char *)g_screen_ptr + offs);\r
 172                         for (i = len; i; i--, p++)\r
 173                                 *p = 0xe0e0e0e0;\r
 174                 }\r
 175                 emu_textOut8(x, y, text);\r
 176         } else {\r
 177                 len = (len+1) >> 1;\r
 178                 for (h = 0; h < 8; h++) {\r
 179                         offs = (x + g_screen_width * (y+h)) & ~1;\r
 180                         p = (int *) ((short *)g_screen_ptr + offs);\r
 181                         for (i = len; i; i--, p++)\r
 182                                 *p = (*p >> 2) & 0x39e7;\r
 183                 }\r
 184                 emu_textOut16(x, y, text);\r
 185         }\r
 186 }\r
 187 \r
 188 static void draw_cd_leds(void)\r
 189 {\r
 190         int old_reg;\r
 191         old_reg = Pico_mcd->s68k_regs[0];\r
 192 \r
 193         if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP)) {\r
 194                 // 8-bit modes\r
 195                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 196                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 197                 *(unsigned int *)((char *)g_screen_ptr + 320*2+ 4) =\r
 198                 *(unsigned int *)((char *)g_screen_ptr + 320*3+ 4) =\r
 199                 *(unsigned int *)((char *)g_screen_ptr + 320*4+ 4) = col_g;\r
 200                 *(unsigned int *)((char *)g_screen_ptr + 320*2+12) =\r
 201                 *(unsigned int *)((char *)g_screen_ptr + 320*3+12) =\r
 202                 *(unsigned int *)((char *)g_screen_ptr + 320*4+12) = col_r;\r
 203         } else {\r
 204                 // 16-bit modes\r
 205                 unsigned int *p = (unsigned int *)((short *)g_screen_ptr + 320*2+4);\r
 206                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 207                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 208                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 209                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 210                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 211         }\r
 212 }\r
 213 \r
 214 static void draw_pico_ptr(void)\r
 215 {\r
 216         unsigned short *p = (unsigned short *)g_screen_ptr;\r
 217 \r
 218         // only if pen enabled and for 16bit modes\r
 219         if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;\r
 220 \r
 221         if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))\r
 222                 p += 32;\r
 223 \r
 224         p += 320 * (pico_pen_y + PICO_PEN_ADJUST_Y);\r
 225         p += pico_pen_x + PICO_PEN_ADJUST_X;\r
 226         p[0]   ^= 0xffff;\r
 227         p[319] ^= 0xffff;\r
 228         p[320] ^= 0xffff;\r
 229         p[321] ^= 0xffff;\r
 230         p[640] ^= 0xffff;\r
 231 }\r
 232 \r
 233 static int EmuScanBegin16(unsigned int num)\r
 234 {\r
 235         if (!(Pico.video.reg[1]&8)) num += 8;\r
 236         DrawLineDest = (unsigned short *) g_screen_ptr + g_screen_width * num;\r
 237 \r
 238         return 0;\r
 239 }\r
 240 \r
 241 static int EmuScanBegin8(unsigned int num)\r
 242 {\r
 243         if (!(Pico.video.reg[1]&8)) num += 8;\r
 244         DrawLineDest = (unsigned char *)  g_screen_ptr + g_screen_width * num;\r
 245 \r
 246         return 0;\r
 247 }\r
 248 \r
 249 int localPal[0x100];\r
 250 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 251 \r
 252 static void blit(const char *fps, const char *notice)\r
 253 {\r
 254         int emu_opt = currentConfig.EmuOpt;\r
 255 \r
 256         if (PicoOpt & POPT_ALT_RENDERER)\r
 257         {\r
 258                 // 8bit fast renderer\r
 259                 if (Pico.m.dirtyPal) {\r
 260                         Pico.m.dirtyPal = 0;\r
 261                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 262                         // feed new palette to our device\r
 263                         gp2x_video_setpalette(localPal, 0x40);\r
 264                 }\r
 265                 // a hack for VR\r
 266                 if (PicoRead16Hook == PicoSVPRead16)\r
 267                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 268                 // do actual copy\r
 269                 vidCpyM2((unsigned char *)g_screen_ptr+320*8, PicoDraw2FB+328*8);\r
 270         }\r
 271         else if (!(emu_opt & EOPT_16BPP))\r
 272         {\r
 273                 // 8bit accurate renderer\r
 274                 if (Pico.m.dirtyPal)\r
 275                 {\r
 276                         int pallen = 0xc0;\r
 277                         Pico.m.dirtyPal = 0;\r
 278                         if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
 279                         {\r
 280                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 281                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 282                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 283                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 284                                 pallen = 0x100;\r
 285                         }\r
 286                         else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
 287                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 288                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 289                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 290                         }\r
 291                         else {\r
 292                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 293                                 memcpy32(localPal+0x80, localPal, 0x40); // for spr prio mess\r
 294                         }\r
 295                         if (pallen > 0xc0) {\r
 296                                 localPal[0xc0] = 0x0000c000;\r
 297                                 localPal[0xd0] = 0x00c00000;\r
 298                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 299                                 localPal[0xf0] = 0x00ffffff;\r
 300                         }\r
 301                         gp2x_video_setpalette(localPal, pallen);\r
 302                 }\r
 303         }\r
 304 \r
 305         if (notice || (emu_opt & 2)) {\r
 306                 int h = 232;\r
 307                 if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(Pico.video.reg[1]&8))\r
 308                         h -= 8;\r
 309                 if (notice)\r
 310                         osd_text(4, h, notice);\r
 311                 if (emu_opt & 2)\r
 312                         osd_text(osd_fps_x, h, fps);\r
 313         }\r
 314         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
 315                 draw_cd_leds();\r
 316         if (PicoAHW & PAHW_PICO)\r
 317                 draw_pico_ptr();\r
 318 \r
 319         gp2x_video_flip();\r
 320 \r
 321         if (!(PicoOpt & POPT_ALT_RENDERER)) {\r
 322                 if (!(Pico.video.reg[1]&8)) {\r
 323                         if (currentConfig.EmuOpt & EOPT_16BPP)\r
 324                                 DrawLineDest = (unsigned short *) g_screen_ptr + 320*8;\r
 325                         else\r
 326                                 DrawLineDest = (unsigned char  *) g_screen_ptr + 320*8;\r
 327                 } else {\r
 328                         DrawLineDest = g_screen_ptr;\r
 329                 }\r
 330         }\r
 331 }\r
 332 \r
 333 // clears whole screen or just the notice area (in all buffers)\r
 334 static void clearArea(int full)\r
 335 {\r
 336         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 337                 // 8-bit renderers\r
 338                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 339                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 340         } else {\r
 341                 // 16bit accurate renderer\r
 342                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 343                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 344         }\r
 345 }\r
 346 \r
 347 void plat_status_msg_busy_next(const char *msg)\r
 348 {\r
 349         clearArea(0);\r
 350         blit("", msg);\r
 351 \r
 352         /* assumption: msg_busy_next gets called only when\r
 353          * something slow is about to happen */\r
 354         reset_timing = 1;\r
 355 }\r
 356 \r
 357 void plat_status_msg_busy_first(const char *msg)\r
 358 {\r
 359         gp2x_memcpy_all_buffers(g_screen_ptr, 0, 320*240*2);\r
 360         plat_status_msg_busy_next(msg);\r
 361 }\r
 362 \r
 363 static void vidResetMode(void)\r
 364 {\r
 365         if (PicoOpt & POPT_ALT_RENDERER) {\r
 366                 gp2x_video_changemode(8);\r
 367         } else if (currentConfig.EmuOpt & EOPT_16BPP) {\r
 368                 gp2x_video_changemode(16);\r
 369                 PicoDrawSetColorFormat(1);\r
 370                 PicoScanBegin = EmuScanBegin16;\r
 371         } else {\r
 372                 gp2x_video_changemode(8);\r
 373                 PicoDrawSetColorFormat(2);\r
 374                 PicoScanBegin = EmuScanBegin8;\r
 375         }\r
 376         if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP)) {\r
 377                 // setup pal for 8-bit modes\r
 378                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 379                 localPal[0xd0] = 0x00c00000;\r
 380                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 381                 localPal[0xf0] = 0x00ffffff;\r
 382                 gp2x_video_setpalette(localPal, 0x100);\r
 383                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 384                 gp2x_video_flip();\r
 385         }\r
 386         Pico.m.dirtyPal = 1;\r
 387         // reset scaling\r
 388         if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(Pico.video.reg[1]&8))\r
 389              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 390         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 391 }\r
 392 \r
 393 void plat_video_toggle_renderer(void)\r
 394 {\r
 395         if (PicoOpt & POPT_ALT_RENDERER) {\r
 396                 PicoOpt &= ~POPT_ALT_RENDERER;\r
 397                 currentConfig.EmuOpt |= EOPT_16BPP;\r
 398         } else if (!(currentConfig.EmuOpt & EOPT_16BPP))\r
 399                 PicoOpt |= POPT_ALT_RENDERER;\r
 400         else\r
 401                 currentConfig.EmuOpt &= ~EOPT_16BPP;\r
 402 \r
 403         vidResetMode();\r
 404 \r
 405         if (PicoOpt & POPT_ALT_RENDERER) {\r
 406                 plat_status_msg(" 8bit fast renderer");\r
 407         } else if (currentConfig.EmuOpt & EOPT_16BPP) {\r
 408                 plat_status_msg("16bit accurate renderer");\r
 409         } else {\r
 410                 plat_status_msg(" 8bit accurate renderer");\r
 411         }\r
 412 }\r
 413 \r
 414 static void emu_msg_tray_open(void)\r
 415 {\r
 416         plat_status_msg("CD tray opened");\r
 417 }\r
 418 \r
 419 static void RunEventsPico(unsigned int events)\r
 420 {\r
 421         int ret, px, py, lim_x;\r
 422         static int pdown_frames = 0;\r
 423 \r
 424         emu_RunEventsPico(events);\r
 425 \r
 426         if (pico_inp_mode == 0) return;\r
 427 \r
 428         // for F200\r
 429         ret = gp2x_touchpad_read(&px, &py);\r
 430         if (ret >= 0)\r
 431         {\r
 432                 if (ret > 35000)\r
 433                 {\r
 434                         if (pdown_frames++ > 5)\r
 435                                 PicoPad[0] |= 0x20;\r
 436 \r
 437                         pico_pen_x = px;\r
 438                         pico_pen_y = py;\r
 439                         if (!(Pico.video.reg[12]&1)) {\r
 440                                 pico_pen_x -= 32;\r
 441                                 if (pico_pen_x <   0) pico_pen_x = 0;\r
 442                                 if (pico_pen_x > 248) pico_pen_x = 248;\r
 443                         }\r
 444                         if (pico_pen_y > 224) pico_pen_y = 224;\r
 445                 }\r
 446                 else\r
 447                         pdown_frames = 0;\r
 448 \r
 449                 //if (ret == 0)\r
 450                 //      PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
 451         }\r
 452 \r
 453         if (PicoPad[0] & 1) pico_pen_y--;\r
 454         if (PicoPad[0] & 2) pico_pen_y++;\r
 455         if (PicoPad[0] & 4) pico_pen_x--;\r
 456         if (PicoPad[0] & 8) pico_pen_x++;\r
 457         PicoPad[0] &= ~0x0f; // release UDLR\r
 458 \r
 459         lim_x = (Pico.video.reg[12]&1) ? 319 : 255;\r
 460         if (pico_pen_y < 8) pico_pen_y = 8;\r
 461         if (pico_pen_y > 224-PICO_PEN_ADJUST_Y) pico_pen_y = 224-PICO_PEN_ADJUST_Y;\r
 462         if (pico_pen_x < 0) pico_pen_x = 0;\r
 463         if (pico_pen_x > lim_x-PICO_PEN_ADJUST_X) pico_pen_x = lim_x-PICO_PEN_ADJUST_X;\r
 464 \r
 465         PicoPicohw.pen_pos[0] = pico_pen_x;\r
 466         if (!(Pico.video.reg[12]&1)) PicoPicohw.pen_pos[0] += pico_pen_x/4;\r
 467         PicoPicohw.pen_pos[0] += 0x3c;\r
 468         PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);\r
 469 }\r
 470 \r
 471 void plat_update_volume(int has_changed, int is_up)\r
 472 {\r
 473         static int prev_frame = 0, wait_frames = 0;\r
 474         int vol = currentConfig.volume;\r
 475         int need_low_volume = 0;\r
 476         gp2x_soc_t soc;\r
 477 \r
 478         soc = soc_detect();\r
 479         if ((PicoOpt & POPT_EN_STEREO) && soc == SOCID_MMSP2)\r
 480                 need_low_volume = 1;\r
 481 \r
 482         if (has_changed)\r
 483         {\r
 484                 if (need_low_volume && vol < 5 && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 485                         wait_frames++;\r
 486                 else {\r
 487                         if (is_up) {\r
 488                                 if (vol < 99) vol++;\r
 489                         } else {\r
 490                                 if (vol >  0) vol--;\r
 491                         }\r
 492                         wait_frames = 0;\r
 493                         sndout_oss_setvol(vol, vol);\r
 494                         currentConfig.volume = vol;\r
 495                 }\r
 496                 plat_status_msg("VOL: %02i", vol);\r
 497                 prev_frame = Pico.m.frame_count;\r
 498         }\r
 499 \r
 500         if (need_low_volume)\r
 501                 return;\r
 502 \r
 503         /* set the right mixer func */\r
 504         if (vol >= 5)\r
 505                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 506         else {\r
 507                 mix_32_to_16l_level = 5 - vol;\r
 508                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 509         }\r
 510 }\r
 511 \r
 512 \r
 513 static void updateSound(int len)\r
 514 {\r
 515         if (PicoOpt&8) len<<=1;\r
 516 \r
 517         /* avoid writing audio when lagging behind to prevent audio lag */\r
 518         if (PicoSkipFrame != 2)\r
 519                 sndout_oss_write(PsndOut, len<<1);\r
 520 }\r
 521 \r
 522 void emu_startSound(void)\r
 523 {\r
 524         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
 525         int target_fps = Pico.m.pal ? 50 : 60;\r
 526 \r
 527         PsndOut = NULL;\r
 528 \r
 529         // prepare sound stuff\r
 530         if (currentConfig.EmuOpt & 4)\r
 531         {\r
 532                 int snd_excess_add;\r
 533                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 534                                 ((PicoOpt&0x200) && crashed_940)) {\r
 535                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 536                 }\r
 537                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 538                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 539                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 540                 sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
 541                 sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
 542                 PicoWriteSound = updateSound;\r
 543                 plat_update_volume(0, 0);\r
 544                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 545                 PsndOut = sndBuffer;\r
 546                 PsndRate_old = PsndRate;\r
 547                 PicoOpt_old  = PicoOpt;\r
 548                 pal_old = Pico.m.pal;\r
 549         }\r
 550 }\r
 551 \r
 552 void emu_endSound(void)\r
 553 {\r
 554 }\r
 555 \r
 556 /* wait until we can write more sound */\r
 557 void emu_waitSound(void)\r
 558 {\r
 559         // don't need to do anything, writes will block by themselves\r
 560 }\r
 561 \r
 562 \r
 563 static void SkipFrame(int do_audio)\r
 564 {\r
 565         PicoSkipFrame=do_audio ? 1 : 2;\r
 566         PicoFrame();\r
 567         PicoSkipFrame=0;\r
 568 }\r
 569 \r
 570 \r
 571 void emu_forcedFrame(int opts)\r
 572 {\r
 573         int po_old = PicoOpt;\r
 574         int eo_old = currentConfig.EmuOpt;\r
 575 \r
 576         PicoOpt &= ~0x10;\r
 577         PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
 578         currentConfig.EmuOpt |= 0x80;\r
 579 \r
 580         //vidResetMode();\r
 581         PicoDrawSetColorFormat(1);\r
 582         PicoScanBegin = EmuScanBegin16;\r
 583         Pico.m.dirtyPal = 1;\r
 584         PicoFrameDrawOnly();\r
 585 \r
 586 /*\r
 587         if (!(Pico.video.reg[12]&1)) {\r
 588                 vidCpyM2 = vidCpyM2_32col;\r
 589                 clearArea(1);\r
 590         } else  vidCpyM2 = vidCpyM2_40col;\r
 591 \r
 592         vidCpyM2((unsigned char *)g_screen_ptr+320*8, PicoDraw2FB+328*8);\r
 593         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 594         gp2x_video_setpalette(localPal, 0x40);\r
 595 */\r
 596         PicoOpt = po_old;\r
 597         currentConfig.EmuOpt = eo_old;\r
 598 }\r
 599 \r
 600 void emu_platformDebugCat(char *str)\r
 601 {\r
 602         // nothing\r
 603 }\r
 604 \r
 605 static void simpleWait(int thissec, int lim_time)\r
 606 {\r
 607         struct timeval tval;\r
 608 \r
 609         spend_cycles(1024);\r
 610         gettimeofday(&tval, 0);\r
 611         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 612 \r
 613         while (tval.tv_usec < lim_time)\r
 614         {\r
 615                 spend_cycles(1024);\r
 616                 gettimeofday(&tval, 0);\r
 617                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 618         }\r
 619 }\r
 620 \r
 621 \r
 622 #if 0\r
 623 static void tga_dump(void)\r
 624 {\r
 625 #define BYTE unsigned char\r
 626 #define WORD unsigned short\r
 627         struct\r
 628         {\r
 629                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 630                 BYTE ColorMapType;    /* 01h  Color map type */\r
 631                 BYTE ImageType;       /* 02h  Image type code */\r
 632                 WORD CMapStart;       /* 03h  Color map origin */\r
 633                 WORD CMapLength;      /* 05h  Color map length */\r
 634                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 635                 WORD XOffset;         /* 08h  X origin of image */\r
 636                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 637                 WORD Width;           /* 0Ch  Width of image */\r
 638                 WORD Height;          /* 0Eh  Height of image */\r
 639                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 640                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 641         } __attribute__((packed)) TGAHEAD;\r
 642         static unsigned short oldscr[320*240];\r
 643         FILE *f; char name[128]; int i;\r
 644 \r
 645         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 646         TGAHEAD.ImageType = 2;\r
 647         TGAHEAD.Width = 320;\r
 648         TGAHEAD.Height = 240;\r
 649         TGAHEAD.PixelDepth = 16;\r
 650         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 651 \r
 652 #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 653 \r
 654         for (i = 0; i < 320*240; i++)\r
 655                 if(oldscr[i] != CONV(((unsigned short *)g_screen_ptr)[i])) break;\r
 656         if (i < 320*240)\r
 657         {\r
 658                 for (i = 0; i < 320*240; i++)\r
 659                         oldscr[i] = CONV(((unsigned short *)g_screen_ptr)[i]);\r
 660                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 661                 f = fopen(name, "wb");\r
 662                 if (!f) { printf("!f\n"); exit(1); }\r
 663                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 664                 fwrite(oldscr, 1, 320*240*2, f);\r
 665                 fclose(f);\r
 666         }\r
 667 }\r
 668 #endif\r
 669 \r
 670 \r
 671 void emu_Loop(void)\r
 672 {\r
 673         static int gp2x_old_clock = -1, EmuOpt_old = 0;\r
 674         char fpsbuff[24]; // fps count c string\r
 675         struct timeval tval; // timing\r
 676         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 677         int  frames_done,  frames_shown,  thissec; // actual frames\r
 678         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 679         char *notice = 0;\r
 680 \r
 681         printf("entered emu_Loop()\n");\r
 682 \r
 683         if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_RAM_TIMINGS) {\r
 684                 if (currentConfig.EmuOpt & EOPT_RAM_TIMINGS)\r
 685                         set_ram_timings();\r
 686                 else\r
 687                         unset_ram_timings();\r
 688         }\r
 689 \r
 690         if (gp2x_old_clock < 0)\r
 691                 gp2x_old_clock = default_cpu_clock;\r
 692         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 693                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 694                 gp2x_set_cpuclk(currentConfig.CPUclock);\r
 695                 gp2x_old_clock = currentConfig.CPUclock;\r
 696                 printf(" done\n");\r
 697         }\r
 698 \r
 699         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 700                 set_lcd_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 701                 gp2x_old_gamma = currentConfig.gamma;\r
 702                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 703         }\r
 704 \r
 705         if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_PSYNC) {\r
 706                 if (currentConfig.EmuOpt & EOPT_PSYNC)\r
 707                         set_lcd_custom_rate(Pico.m.pal);\r
 708                 else\r
 709                         unset_lcd_custom_rate();\r
 710         }\r
 711 \r
 712         if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_MMUHACK)\r
 713                 gp2x_make_fb_bufferable(currentConfig.EmuOpt & EOPT_MMUHACK);\r
 714 \r
 715         EmuOpt_old = currentConfig.EmuOpt;\r
 716         fpsbuff[0] = 0;\r
 717 \r
 718         // make sure we are in correct mode\r
 719         vidResetMode();\r
 720         scaling_update();\r
 721         Pico.m.dirtyPal = 1;\r
 722         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 723 \r
 724         // pal/ntsc might have changed, reset related stuff\r
 725         target_fps = Pico.m.pal ? 50 : 60;\r
 726         target_frametime = 1000000/target_fps;\r
 727         reset_timing = 1;\r
 728 \r
 729         emu_startSound();\r
 730 \r
 731         // prepare CD buffer\r
 732         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
 733 \r
 734         // calc vsync offset to sync timing code with vsync\r
 735         if (currentConfig.EmuOpt&0x2000) {\r
 736                 gettimeofday(&tval, 0);\r
 737                 gp2x_video_wait_vsync();\r
 738                 gettimeofday(&tval, 0);\r
 739                 vsync_offset = tval.tv_usec;\r
 740                 while (vsync_offset >= target_frametime)\r
 741                         vsync_offset -= target_frametime;\r
 742                 if (!vsync_offset) vsync_offset++;\r
 743                 printf("vsync_offset: %i\n", vsync_offset);\r
 744         } else\r
 745                 vsync_offset = 0;\r
 746 \r
 747         frames_done = frames_shown = thissec =\r
 748         pframes_done = pframes_shown = pthissec = 0;\r
 749 \r
 750         // loop\r
 751         while (engineState == PGS_Running)\r
 752         {\r
 753                 int modes;\r
 754 \r
 755                 gettimeofday(&tval, 0);\r
 756                 if (reset_timing) {\r
 757                         reset_timing = 0;\r
 758                         pthissec = tval.tv_sec;\r
 759                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 760                 }\r
 761 \r
 762                 // show notice message?\r
 763                 if (noticeMsgTime.tv_sec)\r
 764                 {\r
 765                         static int noticeMsgSum;\r
 766                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 767                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 768                                 clearArea(0);\r
 769                                 notice = 0;\r
 770                         } else {\r
 771                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 772                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 773                                 notice = noticeMsg;\r
 774                         }\r
 775                 }\r
 776 \r
 777                 // check for mode changes\r
 778                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 779                 if (modes != oldmodes)\r
 780                 {\r
 781                         int scalex = 320;\r
 782                         osd_fps_x = OSD_FPS_X;\r
 783                         if (modes & 4) {\r
 784                                 vidCpyM2 = vidCpyM2_40col;\r
 785                         } else {\r
 786                                 if (PicoOpt & 0x100) {\r
 787                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 788                                         scalex = 256;\r
 789                                         osd_fps_x = OSD_FPS_X - 64;\r
 790                                 } else {\r
 791                                         vidCpyM2 = vidCpyM2_32col;\r
 792                                 }\r
 793                         }\r
 794                         /* want vertical scaling and game is not in 240 line mode */\r
 795                         if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(modes&8))\r
 796                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 797                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 798                         oldmodes = modes;\r
 799                         clearArea(1);\r
 800                 }\r
 801 \r
 802                 // second changed?\r
 803                 if (thissec != tval.tv_sec)\r
 804                 {\r
 805 #ifdef BENCHMARK\r
 806                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 807                         if (++bench == 10) {\r
 808                                 bench = 0;\r
 809                                 bench_fps_s = bench_fps;\r
 810                                 bf[bfp++ & 3] = bench_fps;\r
 811                                 bench_fps = 0;\r
 812                         }\r
 813                         bench_fps += frames_shown;\r
 814                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 815 #else\r
 816                         if (currentConfig.EmuOpt & 2) {\r
 817                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 818                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 819                         }\r
 820 #endif\r
 821                         frames_shown = frames_done = 0;\r
 822                         thissec = tval.tv_sec;\r
 823                 }\r
 824 #ifdef PFRAMES\r
 825                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 826 #endif\r
 827 \r
 828                 if (pthissec != tval.tv_sec)\r
 829                 {\r
 830                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 831                                 pframes_done = pframes_shown = 0;\r
 832                         } else {\r
 833                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 834                                 // when second changes, but we don't want buffer to starve.\r
 835                                 if (PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 836                                         emu_update_input();\r
 837                                         SkipFrame(1); pframes_done++;\r
 838                                 }\r
 839 \r
 840                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 841                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 842                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 843                         }\r
 844                         pthissec = tval.tv_sec;\r
 845                 }\r
 846 \r
 847                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 848                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 849                 {\r
 850                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 851                                 emu_update_input();\r
 852                                 SkipFrame(1); pframes_done++; frames_done++;\r
 853                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 854                                         gettimeofday(&tval, 0);\r
 855                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 856                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 857                                                 simpleWait(pthissec, lim_time);\r
 858                                         }\r
 859                                 }\r
 860                                 lim_time += target_frametime;\r
 861                         }\r
 862                 }\r
 863                 else if (tval.tv_usec > lim_time) // auto frameskip\r
 864                 {\r
 865                         // no time left for this frame - skip\r
 866                         if (tval.tv_usec - lim_time >= 300000) {\r
 867                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 868                                  * try to recover by resetting timing... */\r
 869                                 reset_timing = 1;\r
 870                                 continue;\r
 871                         }\r
 872                         emu_update_input();\r
 873                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
 874                         continue;\r
 875                 }\r
 876 \r
 877                 emu_update_input();\r
 878                 PicoFrame();\r
 879 \r
 880                 // check time\r
 881                 gettimeofday(&tval, 0);\r
 882                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 883 \r
 884                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 885                         reset_timing = 1;\r
 886                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 887                 {\r
 888                         // sleep or vsync if we are still too fast\r
 889                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 890                         if (!reset_timing && tval.tv_usec < lim_time)\r
 891                         {\r
 892                                 // we are too fast\r
 893                                 if (vsync_offset) {\r
 894                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 895                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
 896                                         gp2x_video_wait_vsync();\r
 897                                 } else {\r
 898                                         simpleWait(pthissec, lim_time);\r
 899                                 }\r
 900                         }\r
 901                 }\r
 902 \r
 903                 blit(fpsbuff, notice);\r
 904 \r
 905                 pframes_done++; pframes_shown++;\r
 906                  frames_done++;  frames_shown++;\r
 907         }\r
 908 \r
 909         emu_changeFastForward(0);\r
 910 \r
 911         if (PicoAHW & PAHW_MCD)\r
 912                 PicoCDBufferFree();\r
 913 \r
 914         // save SRAM\r
 915         if ((currentConfig.EmuOpt & EOPT_USE_SRAM) && SRam.changed) {\r
 916                 plat_status_msg_busy_first("Writing SRAM/BRAM...");\r
 917                 emu_SaveLoadGame(0, 1);\r
 918                 SRam.changed = 0;\r
 919         }\r
 920 \r
 921         // if in 8bit mode, generate 16bit image for menu background\r
 922         if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP))\r
 923                 emu_forcedFrame(POPT_EN_SOFTSCALE);\r
 924 }\r
 925 \r
 926 \r
 927 void emu_ResetGame(void)\r
 928 {\r
 929         PicoReset();\r
 930         reset_timing = 1;\r
 931 }\r
 932 \r
 933 const char *plat_get_credits(void)\r
 934 {\r
 935         return "PicoDrive v" VERSION " (c) notaz, 2006-2009\n\n\n"\r
 936                 "Credits:\n"\r
 937                 "fDave: Cyclone 68000 core,\n"\r
 938                 "      base code of PicoDrive\n"\r
 939                 "Reesy & FluBBa: DrZ80 core\n"\r
 940                 "MAME devs: YM2612 and SN76496 cores\n"\r
 941                 "rlyeh and others: minimal SDK\n"\r
 942                 "Squidge: mmuhack\n"\r
 943                 "Dzz: ARM940 sample\n"\r
 944                 "GnoStiC / Puck2099: USB joy code\n"\r
 945                 "craigix: GP2X hardware\n"\r
 946                 "ketchupgun: skin design\n"\r
 947                 "\n"\r
 948                 "special thanks (for docs, ideas):\n"\r
 949                 " Charles MacDonald, Haze,\n"\r
 950                 " Stephane Dallongeville,\n"\r
 951                 " Lordus, Exophase, Rokas,\n"\r
 952                 " Nemesis, Tasco Deluxe";\r
 953 }\r