platform/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 <stdarg.h>\r
  10 \r
  11 #include "plat_gp2x.h"\r
  12 #include "soc.h"\r
  13 #include "../common/plat.h"\r
  14 #include "../common/menu.h"\r
  15 #include "../common/arm_utils.h"\r
  16 #include "../common/fonts.h"\r
  17 #include "../common/emu.h"\r
  18 #include "../common/config.h"\r
  19 #include "../linux/sndout_oss.h"\r
  20 #include "version.h"\r
  21 \r
  22 #include <pico/pico_int.h>\r
  23 #include <pico/patch.h>\r
  24 #include <pico/sound/mix.h>\r
  25 #include <zlib/zlib.h>\r
  26 \r
  27 //#define PFRAMES\r
  28 \r
  29 #ifdef BENCHMARK\r
  30 #define OSD_FPS_X 220\r
  31 #else\r
  32 #define OSD_FPS_X 260\r
  33 #endif\r
  34 \r
  35 \r
  36 extern int crashed_940;\r
  37 \r
  38 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
  39 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  40 static char noticeMsg[40];\r
  41 static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)];\r
  42 unsigned char *PicoDraw2FB = PicoDraw2FB_;\r
  43 static int osd_fps_x;\r
  44 \r
  45 extern void *gp2x_screens[4];\r
  46 \r
  47 void plat_status_msg(const char *format, ...)\r
  48 {\r
  49         va_list vl;\r
  50 \r
  51         va_start(vl, format);\r
  52         vsnprintf(noticeMsg, sizeof(noticeMsg), format, vl);\r
  53         va_end(vl);\r
  54 \r
  55         gettimeofday(&noticeMsgTime, 0);\r
  56 }\r
  57 \r
  58 int plat_get_root_dir(char *dst, int len)\r
  59 {\r
  60         extern char **g_argv;\r
  61         int j;\r
  62 \r
  63         strncpy(dst, g_argv[0], len);\r
  64         len -= 32; // reserve\r
  65         if (len < 0) len = 0;\r
  66         dst[len] = 0;\r
  67         for (j = strlen(dst); j > 0; j--)\r
  68                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  69 \r
  70         return j + 1;\r
  71 }\r
  72 \r
  73 \r
  74 static void scaling_update(void)\r
  75 {\r
  76         PicoOpt &= ~(POPT_DIS_32C_BORDER|POPT_EN_SOFTSCALE);\r
  77         switch (currentConfig.scaling) {\r
  78                 default:break;\r
  79                 case EOPT_SCALE_HW_H:\r
  80                 case EOPT_SCALE_HW_HV:\r
  81                         PicoOpt |= POPT_DIS_32C_BORDER;\r
  82                         break;\r
  83                 case EOPT_SCALE_SW_H:\r
  84                         PicoOpt |= POPT_EN_SOFTSCALE;\r
  85                         break;\r
  86         }\r
  87 }\r
  88 \r
  89 \r
  90 void pemu_prep_defconfig(void)\r
  91 {\r
  92         gp2x_soc_t soc;\r
  93 \r
  94         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
  95         defaultConfig.EmuOpt    = 0x9d | EOPT_RAM_TIMINGS|EOPT_CONFIRM_SAVE|EOPT_EN_CD_LEDS;\r
  96         defaultConfig.s_PicoOpt = 0x0f | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;\r
  97         defaultConfig.s_PsndRate = 44100;\r
  98         defaultConfig.s_PicoRegion = 0; // auto\r
  99         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 100         defaultConfig.s_PicoCDBuffers = 0;\r
 101         defaultConfig.Frameskip = -1; // auto\r
 102         defaultConfig.CPUclock = default_cpu_clock;\r
 103         defaultConfig.volume = 50;\r
 104         defaultConfig.gamma = 100;\r
 105         defaultConfig.scaling = 0;\r
 106         defaultConfig.turbo_rate = 15;\r
 107 \r
 108         soc = soc_detect();\r
 109         if (soc == SOCID_MMSP2)\r
 110                 defaultConfig.s_PicoOpt |= POPT_EXT_FM;\r
 111         else if (soc == SOCID_POLLUX)\r
 112                 defaultConfig.EmuOpt |= EOPT_WIZ_TEAR_FIX|EOPT_SHOW_RTC;\r
 113 }\r
 114 \r
 115 static void (*osd_text)(int x, int y, const char *text);\r
 116 \r
 117 static void osd_text8(int x, int y, const char *text)\r
 118 {\r
 119         int len = strlen(text)*8;\r
 120         int *p, i, h, offs;\r
 121 \r
 122         len = (len+3) >> 2;\r
 123         for (h = 0; h < 8; h++) {\r
 124                 offs = (x + g_screen_width * (y+h)) & ~3;\r
 125                 p = (int *) ((char *)g_screen_ptr + offs);\r
 126                 for (i = len; i; i--, p++)\r
 127                         *p = 0xe0e0e0e0;\r
 128         }\r
 129         emu_text_out8(x, y, text);\r
 130 }\r
 131 \r
 132 static void osd_text16(int x, int y, const char *text)\r
 133 {\r
 134         int len = strlen(text)*8;\r
 135         int *p, i, h, offs;\r
 136 \r
 137         len = (len+1) >> 1;\r
 138         for (h = 0; h < 8; h++) {\r
 139                 offs = (x + g_screen_width * (y+h)) & ~1;\r
 140                 p = (int *) ((short *)g_screen_ptr + offs);\r
 141                 for (i = len; i; i--, p++)\r
 142                         *p = (*p >> 2) & 0x39e7;\r
 143         }\r
 144         emu_text_out16(x, y, text);\r
 145 }\r
 146 \r
 147 static void osd_text8_rot(int x, int y, const char *text)\r
 148 {\r
 149         int len = strlen(text) * 8;\r
 150         char *p = (char *)g_screen_ptr + 240*(320-x) + y;\r
 151 \r
 152         while (len--) {\r
 153                 memset(p, 0xe0, 8);\r
 154                 p -= 240;\r
 155         }\r
 156 \r
 157         emu_text_out8_rot(x, y, text);\r
 158 }\r
 159 \r
 160 static void osd_text16_rot(int x, int y, const char *text)\r
 161 {\r
 162         int len = strlen(text) * 8;\r
 163         short *p = (short *)g_screen_ptr + 240*(320-x) + y;\r
 164 \r
 165         while (len--) {\r
 166                 memset(p, 0, 8*2);\r
 167                 p -= 240;\r
 168         }\r
 169 \r
 170         emu_text_out16_rot(x, y, text);\r
 171 }\r
 172 \r
 173 static void draw_cd_leds(void)\r
 174 {\r
 175         int led_reg, pitch, scr_offs, led_offs;\r
 176         led_reg = Pico_mcd->s68k_regs[0];\r
 177 \r
 178         if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {\r
 179                 pitch = 240;\r
 180                 led_offs = -pitch * 6;\r
 181                 scr_offs = pitch * (320 - 4);\r
 182         } else {\r
 183                 pitch = 320;\r
 184                 led_offs = 4;\r
 185                 scr_offs = pitch * 2 + 4;\r
 186         }\r
 187 \r
 188         if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP)) {\r
 189         #define p(x) px[(x) >> 2]\r
 190                 // 8-bit modes\r
 191                 unsigned int *px = (unsigned int *)((char *)g_screen_ptr + scr_offs);\r
 192                 unsigned int col_g = (led_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 193                 unsigned int col_r = (led_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 194                 p(pitch*0) = p(pitch*1) = p(pitch*2) = col_g;\r
 195                 p(pitch*0 + led_offs) = p(pitch*1 + led_offs) = p(pitch*2 + led_offs) = col_r;\r
 196         #undef p\r
 197         } else {\r
 198         #define p(x) px[(x)*2 >> 2] = px[((x)*2 >> 2) + 1]\r
 199                 // 16-bit modes\r
 200                 unsigned int *px = (unsigned int *)((short *)g_screen_ptr + scr_offs);\r
 201                 unsigned int col_g = (led_reg & 2) ? 0x06000600 : 0;\r
 202                 unsigned int col_r = (led_reg & 1) ? 0xc000c000 : 0;\r
 203                 p(pitch*0) = p(pitch*1) = p(pitch*2) = col_g;\r
 204                 p(pitch*0 + led_offs) = p(pitch*1 + led_offs) = p(pitch*2 + led_offs) = col_r;\r
 205         #undef p\r
 206         }\r
 207 }\r
 208 \r
 209 static void draw_pico_ptr(void)\r
 210 {\r
 211         unsigned short *p = (unsigned short *)g_screen_ptr;\r
 212         int x, y, pitch = 320;\r
 213 \r
 214         // only if pen enabled and for 16bit modes\r
 215         if (pico_inp_mode == 0 || (PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP))\r
 216                 return;\r
 217 \r
 218         x = pico_pen_x + PICO_PEN_ADJUST_X;\r
 219         y = pico_pen_y + PICO_PEN_ADJUST_Y;\r
 220         if (!(Pico.video.reg[12]&1) && !(PicoOpt & POPT_DIS_32C_BORDER))\r
 221                 x += 32;\r
 222 \r
 223         if (EOPT_WIZ_TEAR_FIX) {\r
 224                 pitch = 240;\r
 225                 p += (319 - x) * pitch + y;\r
 226         } else\r
 227                 p += x + y * pitch;\r
 228 \r
 229         p[0]       ^= 0xffff;\r
 230         p[pitch-1] ^= 0xffff;\r
 231         p[pitch]   ^= 0xffff;\r
 232         p[pitch+1] ^= 0xffff;\r
 233         p[pitch*2] ^= 0xffff;\r
 234 }\r
 235 \r
 236 static int EmuScanBegin16(unsigned int num)\r
 237 {\r
 238         if (!(Pico.video.reg[1]&8)) num += 8;\r
 239         DrawLineDest = (unsigned short *) g_screen_ptr + g_screen_width * num;\r
 240 \r
 241         return 0;\r
 242 }\r
 243 \r
 244 static int EmuScanBegin8(unsigned int num)\r
 245 {\r
 246         if (!(Pico.video.reg[1]&8)) num += 8;\r
 247         DrawLineDest = (unsigned char *)  g_screen_ptr + g_screen_width * num;\r
 248 \r
 249         return 0;\r
 250 }\r
 251 \r
 252 /* rot thing for Wiz */\r
 253 static unsigned char __attribute__((aligned(4))) rot_buff[320*4*2];\r
 254 \r
 255 static int EmuScanBegin16_rot(unsigned int num)\r
 256 {\r
 257         DrawLineDest = rot_buff + (num & 3) * 320 * 2;\r
 258         return 0;\r
 259 }\r
 260 \r
 261 static int EmuScanEnd16_rot(unsigned int num)\r
 262 {\r
 263         if ((num & 3) != 3)\r
 264                 return 0;\r
 265         if (!(Pico.video.reg[1] & 8))\r
 266                 num += 8;\r
 267         rotated_blit16(g_screen_ptr, rot_buff, num + 1,\r
 268                 !(Pico.video.reg[12] & 1) && !(PicoOpt & POPT_EN_SOFTSCALE));\r
 269         return 0;\r
 270 }\r
 271 \r
 272 static int EmuScanBegin8_rot(unsigned int num)\r
 273 {\r
 274         DrawLineDest = rot_buff + (num & 3) * 320;\r
 275         return 0;\r
 276 }\r
 277 \r
 278 static int EmuScanEnd8_rot(unsigned int num)\r
 279 {\r
 280         if ((num & 3) != 3)\r
 281                 return 0;\r
 282         if (!(Pico.video.reg[1] & 8))\r
 283                 num += 8;\r
 284         rotated_blit8(g_screen_ptr, rot_buff, num + 1,\r
 285                 !(Pico.video.reg[12] & 1));\r
 286         return 0;\r
 287 }\r
 288 \r
 289 int localPal[0x100];\r
 290 static void (*vidcpyM2)(void *dest, void *src, int m32col, int with_32c_border) = NULL;\r
 291 \r
 292 static void blit(const char *fps, const char *notice)\r
 293 {\r
 294         int emu_opt = currentConfig.EmuOpt;\r
 295 \r
 296         if (PicoOpt & POPT_ALT_RENDERER)\r
 297         {\r
 298                 // 8bit fast renderer\r
 299                 if (Pico.m.dirtyPal) {\r
 300                         Pico.m.dirtyPal = 0;\r
 301                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 302                         // feed new palette to our device\r
 303                         gp2x_video_setpalette(localPal, 0x40);\r
 304                 }\r
 305                 // a hack for VR\r
 306                 if (PicoRead16Hook == PicoSVPRead16)\r
 307                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 308                 // do actual copy\r
 309                 vidcpyM2(g_screen_ptr, PicoDraw2FB+328*8,\r
 310                         !(Pico.video.reg[12] & 1), !(PicoOpt & POPT_DIS_32C_BORDER));\r
 311         }\r
 312         else if (!(emu_opt & EOPT_16BPP))\r
 313         {\r
 314                 // 8bit accurate renderer\r
 315                 if (Pico.m.dirtyPal)\r
 316                 {\r
 317                         int pallen = 0xc0;\r
 318                         Pico.m.dirtyPal = 0;\r
 319                         if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
 320                         {\r
 321                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 322                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 323                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 324                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 325                                 pallen = 0x100;\r
 326                         }\r
 327                         else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
 328                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 329                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 330                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 331                         }\r
 332                         else {\r
 333                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 334                                 memcpy32(localPal+0x80, localPal, 0x40); // for spr prio mess\r
 335                         }\r
 336                         if (pallen > 0xc0) {\r
 337                                 localPal[0xc0] = 0x0000c000;\r
 338                                 localPal[0xd0] = 0x00c00000;\r
 339                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 340                                 localPal[0xf0] = 0x00ffffff;\r
 341                         }\r
 342                         gp2x_video_setpalette(localPal, pallen);\r
 343                 }\r
 344         }\r
 345 \r
 346         if (notice || (emu_opt & 2)) {\r
 347                 int h = 232;\r
 348                 if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(Pico.video.reg[1]&8))\r
 349                         h -= 8;\r
 350                 if (notice)\r
 351                         osd_text(4, h, notice);\r
 352                 if (emu_opt & 2)\r
 353                         osd_text(osd_fps_x, h, fps);\r
 354         }\r
 355         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
 356                 draw_cd_leds();\r
 357         if (PicoAHW & PAHW_PICO)\r
 358                 draw_pico_ptr();\r
 359 \r
 360         gp2x_video_flip();\r
 361 }\r
 362 \r
 363 // clears whole screen or just the notice area (in all buffers)\r
 364 static void clearArea(int full)\r
 365 {\r
 366         int is_8bit = (PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP);\r
 367         if (!full && (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)) {\r
 368                 /* ugh.. */\r
 369                 int i, u, *p;\r
 370                 if (is_8bit) {\r
 371                         for (i = 0; i < 4; i++) {\r
 372                                 p = (int *)gp2x_screens[i] + (240-8) / 4;\r
 373                                 for (u = 320; u > 0; u--, p += 240/4)\r
 374                                         p[0] = p[1] = 0xe0e0e0e0;\r
 375                         }\r
 376                 } else {\r
 377                         for (i = 0; i < 4; i++) {\r
 378                                 p = (int *)gp2x_screens[i] + (240-8)*2 / 4;\r
 379                                 for (u = 320; u > 0; u--, p += 240*2/4)\r
 380                                         p[0] = p[1] = p[2] = p[3] = 0;\r
 381                         }\r
 382                 }\r
 383                 return;\r
 384         }\r
 385 \r
 386         if (is_8bit) {\r
 387                 // 8-bit renderers\r
 388                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 389                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 390         } else {\r
 391                 // 16bit accurate renderer\r
 392                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 393                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 394         }\r
 395 }\r
 396 \r
 397 void plat_status_msg_busy_next(const char *msg)\r
 398 {\r
 399         clearArea(0);\r
 400         blit("", msg);\r
 401 \r
 402         /* assumption: msg_busy_next gets called only when\r
 403          * something slow is about to happen */\r
 404         reset_timing = 1;\r
 405 }\r
 406 \r
 407 void plat_status_msg_busy_first(const char *msg)\r
 408 {\r
 409         gp2x_memcpy_all_buffers(g_screen_ptr, 0, 320*240*2);\r
 410         plat_status_msg_busy_next(msg);\r
 411 }\r
 412 \r
 413 static void vidResetMode(void)\r
 414 {\r
 415         PicoScanEnd = NULL;\r
 416 \r
 417         if (PicoOpt & POPT_ALT_RENDERER) {\r
 418                 if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {\r
 419                         gp2x_video_changemode(-8);\r
 420                         vidcpyM2 = vidcpy_m2_rot;\r
 421                         osd_text = osd_text8_rot;\r
 422                 } else {\r
 423                         gp2x_video_changemode(8);\r
 424                         vidcpyM2 = vidcpy_m2;\r
 425                         osd_text = osd_text8;\r
 426                 }\r
 427         }\r
 428         else if (currentConfig.EmuOpt & EOPT_16BPP) {\r
 429                 PicoDrawSetColorFormat(1);\r
 430                 if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {\r
 431                         gp2x_video_changemode(-16);\r
 432                         PicoScanBegin = EmuScanBegin16_rot;\r
 433                         PicoScanEnd = EmuScanEnd16_rot;\r
 434                         osd_text = osd_text16_rot;\r
 435                 } else {\r
 436                         gp2x_video_changemode(16);\r
 437                         PicoScanBegin = EmuScanBegin16;\r
 438                         osd_text = osd_text16;\r
 439                 }\r
 440         }\r
 441         else {\r
 442                 PicoDrawSetColorFormat(2);\r
 443                 if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {\r
 444                         gp2x_video_changemode(-8);\r
 445                         PicoScanBegin = EmuScanBegin8_rot;\r
 446                         PicoScanEnd = EmuScanEnd8_rot;\r
 447                         osd_text = osd_text8_rot;\r
 448                 } else {\r
 449                         gp2x_video_changemode(8);\r
 450                         PicoScanBegin = EmuScanBegin8;\r
 451                         osd_text = osd_text8;\r
 452                 }\r
 453         }\r
 454 \r
 455         if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP)) {\r
 456                 // setup pal for 8-bit modes\r
 457                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 458                 localPal[0xd0] = 0x00c00000;\r
 459                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 460                 localPal[0xf0] = 0x00ffffff;\r
 461                 gp2x_video_setpalette(localPal, 0x100);\r
 462                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 463                 gp2x_video_flip();\r
 464         }\r
 465         Pico.m.dirtyPal = 1;\r
 466 \r
 467         // reset scaling\r
 468         if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(Pico.video.reg[1]&8))\r
 469              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 470         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 471 }\r
 472 \r
 473 void plat_video_toggle_renderer(int is_next, int is_menu)\r
 474 {\r
 475         /* alt, 16bpp, 8bpp */\r
 476         if (PicoOpt & POPT_ALT_RENDERER) {\r
 477                 PicoOpt &= ~POPT_ALT_RENDERER;\r
 478                 if (is_next)\r
 479                         currentConfig.EmuOpt |= EOPT_16BPP;\r
 480         } else if (!(currentConfig.EmuOpt & EOPT_16BPP)) {\r
 481                 if (is_next)\r
 482                         PicoOpt |= POPT_ALT_RENDERER;\r
 483                 else\r
 484                         currentConfig.EmuOpt |= EOPT_16BPP;\r
 485         } else {\r
 486                 currentConfig.EmuOpt &= ~EOPT_16BPP;\r
 487                 if (!is_next)\r
 488                         PicoOpt |= POPT_ALT_RENDERER;\r
 489         }\r
 490 \r
 491         if (is_menu)\r
 492                 return;\r
 493 \r
 494         vidResetMode();\r
 495 \r
 496         if (PicoOpt & POPT_ALT_RENDERER) {\r
 497                 plat_status_msg(" 8bit fast renderer");\r
 498         } else if (currentConfig.EmuOpt & EOPT_16BPP) {\r
 499                 plat_status_msg("16bit accurate renderer");\r
 500         } else {\r
 501                 plat_status_msg(" 8bit accurate renderer");\r
 502         }\r
 503 }\r
 504 \r
 505 #if 0 // TODO\r
 506 static void RunEventsPico(unsigned int events)\r
 507 {\r
 508         int ret, px, py, lim_x;\r
 509         static int pdown_frames = 0;\r
 510 \r
 511         // for F200\r
 512         ret = gp2x_touchpad_read(&px, &py);\r
 513         if (ret >= 0)\r
 514         {\r
 515                 if (ret > 35000)\r
 516                 {\r
 517                         if (pdown_frames++ > 5)\r
 518                                 PicoPad[0] |= 0x20;\r
 519 \r
 520                         pico_pen_x = px;\r
 521                         pico_pen_y = py;\r
 522                         if (!(Pico.video.reg[12]&1)) {\r
 523                                 pico_pen_x -= 32;\r
 524                                 if (pico_pen_x <   0) pico_pen_x = 0;\r
 525                                 if (pico_pen_x > 248) pico_pen_x = 248;\r
 526                         }\r
 527                         if (pico_pen_y > 224) pico_pen_y = 224;\r
 528                 }\r
 529                 else\r
 530                         pdown_frames = 0;\r
 531 \r
 532                 //if (ret == 0)\r
 533                 //      PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
 534         }\r
 535 }\r
 536 #endif\r
 537 \r
 538 void plat_update_volume(int has_changed, int is_up)\r
 539 {\r
 540         static int prev_frame = 0, wait_frames = 0;\r
 541         int vol = currentConfig.volume;\r
 542         int need_low_volume = 0;\r
 543         gp2x_soc_t soc;\r
 544 \r
 545         soc = soc_detect();\r
 546         if ((PicoOpt & POPT_EN_STEREO) && soc == SOCID_MMSP2)\r
 547                 need_low_volume = 1;\r
 548 \r
 549         if (has_changed)\r
 550         {\r
 551                 if (need_low_volume && vol < 5 && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 552                         wait_frames++;\r
 553                 else {\r
 554                         if (is_up) {\r
 555                                 if (vol < 99) vol++;\r
 556                         } else {\r
 557                                 if (vol >  0) vol--;\r
 558                         }\r
 559                         wait_frames = 0;\r
 560                         sndout_oss_setvol(vol, vol);\r
 561                         currentConfig.volume = vol;\r
 562                 }\r
 563                 plat_status_msg("VOL: %02i", vol);\r
 564                 prev_frame = Pico.m.frame_count;\r
 565         }\r
 566 \r
 567         if (need_low_volume)\r
 568                 return;\r
 569 \r
 570         /* set the right mixer func */\r
 571         if (vol >= 5)\r
 572                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 573         else {\r
 574                 mix_32_to_16l_level = 5 - vol;\r
 575                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 576         }\r
 577 }\r
 578 \r
 579 \r
 580 static void updateSound(int len)\r
 581 {\r
 582         if (PicoOpt&8) len<<=1;\r
 583 \r
 584         /* avoid writing audio when lagging behind to prevent audio lag */\r
 585         if (PicoSkipFrame != 2)\r
 586                 sndout_oss_write(PsndOut, len<<1);\r
 587 }\r
 588 \r
 589 void pemu_sound_start(void)\r
 590 {\r
 591         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
 592         int target_fps = Pico.m.pal ? 50 : 60;\r
 593 \r
 594         PsndOut = NULL;\r
 595 \r
 596         // prepare sound stuff\r
 597         if (currentConfig.EmuOpt & 4)\r
 598         {\r
 599                 int snd_excess_add;\r
 600                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 601                                 ((PicoOpt&0x200) && crashed_940)) {\r
 602                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 603                 }\r
 604                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 605                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 606                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 607                 sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
 608                 sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
 609                 PicoWriteSound = updateSound;\r
 610                 plat_update_volume(0, 0);\r
 611                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 612                 PsndOut = sndBuffer;\r
 613                 PsndRate_old = PsndRate;\r
 614                 PicoOpt_old  = PicoOpt;\r
 615                 pal_old = Pico.m.pal;\r
 616         }\r
 617 }\r
 618 \r
 619 void pemu_sound_stop(void)\r
 620 {\r
 621 }\r
 622 \r
 623 void pemu_sound_wait(void)\r
 624 {\r
 625         // don't need to do anything, writes will block by themselves\r
 626 }\r
 627 \r
 628 \r
 629 static void SkipFrame(int do_audio)\r
 630 {\r
 631         PicoSkipFrame=do_audio ? 1 : 2;\r
 632         PicoFrame();\r
 633         PicoSkipFrame=0;\r
 634 }\r
 635 \r
 636 \r
 637 void pemu_forced_frame(int opts)\r
 638 {\r
 639         int po_old = PicoOpt;\r
 640         int eo_old = currentConfig.EmuOpt;\r
 641 \r
 642         PicoOpt &= ~POPT_ALT_RENDERER;\r
 643         PicoOpt |= opts|POPT_ACC_SPRITES;\r
 644         currentConfig.EmuOpt |= EOPT_16BPP;\r
 645 \r
 646         PicoDrawSetColorFormat(1);\r
 647         PicoScanBegin = EmuScanBegin16;\r
 648         PicoScanEnd = NULL;\r
 649         Pico.m.dirtyPal = 1;\r
 650         PicoFrameDrawOnly();\r
 651 \r
 652         PicoOpt = po_old;\r
 653         currentConfig.EmuOpt = eo_old;\r
 654 }\r
 655 \r
 656 void plat_debug_cat(char *str)\r
 657 {\r
 658 }\r
 659 \r
 660 static void simpleWait(int thissec, int lim_time)\r
 661 {\r
 662         struct timeval tval;\r
 663 \r
 664         spend_cycles(1024);\r
 665         gettimeofday(&tval, 0);\r
 666         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 667 \r
 668         while (tval.tv_usec < lim_time)\r
 669         {\r
 670                 spend_cycles(1024);\r
 671                 gettimeofday(&tval, 0);\r
 672                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 673         }\r
 674 }\r
 675 \r
 676 \r
 677 #if 0\r
 678 static void tga_dump(void)\r
 679 {\r
 680 #define BYTE unsigned char\r
 681 #define WORD unsigned short\r
 682         struct\r
 683         {\r
 684                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 685                 BYTE ColorMapType;    /* 01h  Color map type */\r
 686                 BYTE ImageType;       /* 02h  Image type code */\r
 687                 WORD CMapStart;       /* 03h  Color map origin */\r
 688                 WORD CMapLength;      /* 05h  Color map length */\r
 689                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 690                 WORD XOffset;         /* 08h  X origin of image */\r
 691                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 692                 WORD Width;           /* 0Ch  Width of image */\r
 693                 WORD Height;          /* 0Eh  Height of image */\r
 694                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 695                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 696         } __attribute__((packed)) TGAHEAD;\r
 697         static unsigned short oldscr[320*240];\r
 698         FILE *f; char name[128]; int i;\r
 699 \r
 700         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 701         TGAHEAD.ImageType = 2;\r
 702         TGAHEAD.Width = 320;\r
 703         TGAHEAD.Height = 240;\r
 704         TGAHEAD.PixelDepth = 16;\r
 705         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 706 \r
 707 #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 708 \r
 709         for (i = 0; i < 320*240; i++)\r
 710                 if(oldscr[i] != CONV(((unsigned short *)g_screen_ptr)[i])) break;\r
 711         if (i < 320*240)\r
 712         {\r
 713                 for (i = 0; i < 320*240; i++)\r
 714                         oldscr[i] = CONV(((unsigned short *)g_screen_ptr)[i]);\r
 715                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 716                 f = fopen(name, "wb");\r
 717                 if (!f) { printf("!f\n"); exit(1); }\r
 718                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 719                 fwrite(oldscr, 1, 320*240*2, f);\r
 720                 fclose(f);\r
 721         }\r
 722 }\r
 723 #endif\r
 724 \r
 725 \r
 726 void pemu_loop(void)\r
 727 {\r
 728         static int gp2x_old_clock = -1, EmuOpt_old = 0, pal_old = 0;\r
 729         static int gp2x_old_gamma = 100;\r
 730         char fpsbuff[24]; // fps count c string\r
 731         struct timeval tval; // timing\r
 732         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 733         int  frames_done,  frames_shown,  thissec; // actual frames\r
 734         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 735         char *notice = 0;\r
 736 \r
 737         printf("entered emu_Loop()\n");\r
 738 \r
 739         if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_RAM_TIMINGS) {\r
 740                 if (currentConfig.EmuOpt & EOPT_RAM_TIMINGS)\r
 741                         set_ram_timings();\r
 742                 else\r
 743                         unset_ram_timings();\r
 744         }\r
 745 \r
 746         if (gp2x_old_clock < 0)\r
 747                 gp2x_old_clock = default_cpu_clock;\r
 748         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 749                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 750                 gp2x_set_cpuclk(currentConfig.CPUclock);\r
 751                 gp2x_old_clock = currentConfig.CPUclock;\r
 752                 printf(" done\n");\r
 753         }\r
 754 \r
 755         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 756                 set_lcd_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 757                 gp2x_old_gamma = currentConfig.gamma;\r
 758                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 759         }\r
 760 \r
 761         if (((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_PSYNC) || Pico.m.pal != pal_old) {\r
 762                 if (currentConfig.EmuOpt & EOPT_PSYNC)\r
 763                         set_lcd_custom_rate(Pico.m.pal);\r
 764                 else\r
 765                         unset_lcd_custom_rate();\r
 766         }\r
 767 \r
 768         if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_MMUHACK)\r
 769                 gp2x_make_fb_bufferable(currentConfig.EmuOpt & EOPT_MMUHACK);\r
 770 \r
 771         EmuOpt_old = currentConfig.EmuOpt;\r
 772         pal_old = Pico.m.pal;\r
 773         fpsbuff[0] = 0;\r
 774 \r
 775         // make sure we are in correct mode\r
 776         vidResetMode();\r
 777         scaling_update();\r
 778         Pico.m.dirtyPal = 1;\r
 779         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 780 \r
 781         // pal/ntsc might have changed, reset related stuff\r
 782         target_fps = Pico.m.pal ? 50 : 60;\r
 783         target_frametime = 1000000/target_fps;\r
 784         reset_timing = 1;\r
 785 \r
 786         pemu_sound_start();\r
 787 \r
 788         // prepare CD buffer\r
 789         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
 790 \r
 791         // calc vsync offset to sync timing code with vsync\r
 792         if (currentConfig.EmuOpt & EOPT_PSYNC) {\r
 793                 gettimeofday(&tval, 0);\r
 794                 gp2x_video_wait_vsync();\r
 795                 gettimeofday(&tval, 0);\r
 796                 vsync_offset = tval.tv_usec;\r
 797                 while (vsync_offset >= target_frametime)\r
 798                         vsync_offset -= target_frametime;\r
 799                 if (!vsync_offset) vsync_offset++;\r
 800                 printf("vsync_offset: %i\n", vsync_offset);\r
 801         } else\r
 802                 vsync_offset = 0;\r
 803 \r
 804         frames_done = frames_shown = thissec =\r
 805         pframes_done = pframes_shown = pthissec = 0;\r
 806 \r
 807         // loop\r
 808         while (engineState == PGS_Running)\r
 809         {\r
 810                 int modes;\r
 811 \r
 812                 gettimeofday(&tval, 0);\r
 813                 if (reset_timing) {\r
 814                         reset_timing = 0;\r
 815                         pthissec = tval.tv_sec;\r
 816                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 817                 }\r
 818 \r
 819                 // show notice message?\r
 820                 if (noticeMsgTime.tv_sec)\r
 821                 {\r
 822                         static int noticeMsgSum;\r
 823                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 824                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 825                                 clearArea(0);\r
 826                                 notice = 0;\r
 827                         } else {\r
 828                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 829                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 830                                 notice = noticeMsg;\r
 831                         }\r
 832                 }\r
 833 \r
 834                 // check for mode changes\r
 835                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 836                 if (modes != oldmodes)\r
 837                 {\r
 838                         int scalex = 320;\r
 839                         osd_fps_x = OSD_FPS_X;\r
 840                         if (!(modes & 4) && (PicoOpt & POPT_DIS_32C_BORDER)) {\r
 841                                 scalex = 256;\r
 842                                 osd_fps_x = OSD_FPS_X - 64;\r
 843                         }\r
 844                         /* want vertical scaling and game is not in 240 line mode */\r
 845                         if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(modes&8))\r
 846                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 847                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 848                         oldmodes = modes;\r
 849                         clearArea(1);\r
 850                 }\r
 851 \r
 852                 // second changed?\r
 853                 if (thissec != tval.tv_sec)\r
 854                 {\r
 855 #ifdef BENCHMARK\r
 856                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 857                         if (++bench == 10) {\r
 858                                 bench = 0;\r
 859                                 bench_fps_s = bench_fps;\r
 860                                 bf[bfp++ & 3] = bench_fps;\r
 861                                 bench_fps = 0;\r
 862                         }\r
 863                         bench_fps += frames_shown;\r
 864                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 865 #else\r
 866                         if (currentConfig.EmuOpt & 2) {\r
 867                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 868                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 869                         }\r
 870 #endif\r
 871                         frames_shown = frames_done = 0;\r
 872                         thissec = tval.tv_sec;\r
 873                 }\r
 874 #ifdef PFRAMES\r
 875                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 876 #endif\r
 877 \r
 878                 if (pthissec != tval.tv_sec)\r
 879                 {\r
 880                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 881                                 pframes_done = pframes_shown = 0;\r
 882                         } else {\r
 883                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 884                                 // when second changes, but we don't want buffer to starve.\r
 885                                 if (PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 886                                         emu_update_input();\r
 887                                         SkipFrame(1); pframes_done++;\r
 888                                 }\r
 889 \r
 890                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 891                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 892                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 893                         }\r
 894                         pthissec = tval.tv_sec;\r
 895                 }\r
 896 \r
 897                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 898                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 899                 {\r
 900                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 901                                 emu_update_input();\r
 902                                 SkipFrame(1); pframes_done++; frames_done++;\r
 903                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 904                                         gettimeofday(&tval, 0);\r
 905                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 906                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 907                                                 simpleWait(pthissec, lim_time);\r
 908                                         }\r
 909                                 }\r
 910                                 lim_time += target_frametime;\r
 911                         }\r
 912                 }\r
 913                 else if (tval.tv_usec > lim_time) // auto frameskip\r
 914                 {\r
 915                         // no time left for this frame - skip\r
 916                         if (tval.tv_usec - lim_time >= 300000) {\r
 917                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 918                                  * try to recover by resetting timing... */\r
 919                                 reset_timing = 1;\r
 920                                 continue;\r
 921                         }\r
 922                         emu_update_input();\r
 923                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
 924                         continue;\r
 925                 }\r
 926 \r
 927                 emu_update_input();\r
 928                 PicoFrame();\r
 929 \r
 930                 // check time\r
 931                 gettimeofday(&tval, 0);\r
 932                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 933 \r
 934                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 935                         reset_timing = 1;\r
 936                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 937                 {\r
 938                         // sleep or vsync if we are still too fast\r
 939                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 940                         if (!reset_timing && tval.tv_usec < lim_time)\r
 941                         {\r
 942                                 // we are too fast\r
 943                                 if (vsync_offset) {\r
 944                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 945                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
 946                                         gp2x_video_wait_vsync();\r
 947                                 } else {\r
 948                                         simpleWait(pthissec, lim_time);\r
 949                                 }\r
 950                         }\r
 951                 }\r
 952 \r
 953                 blit(fpsbuff, notice);\r
 954 \r
 955                 pframes_done++; pframes_shown++;\r
 956                  frames_done++;  frames_shown++;\r
 957         }\r
 958 \r
 959         emu_set_fastforward(0);\r
 960 \r
 961         if (PicoAHW & PAHW_MCD)\r
 962                 PicoCDBufferFree();\r
 963 \r
 964         // save SRAM\r
 965         if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && SRam.changed) {\r
 966                 plat_status_msg_busy_first("Writing SRAM/BRAM...");\r
 967                 emu_save_load_game(0, 1);\r
 968                 SRam.changed = 0;\r
 969         }\r
 970 \r
 971         // do menu background to be sure it's right\r
 972         pemu_forced_frame(POPT_EN_SOFTSCALE);\r
 973 }\r
 974 \r
 975 const char *plat_get_credits(void)\r
 976 {\r
 977         return "PicoDrive v" VERSION " (c) notaz, 2006-2009\n\n\n"\r
 978                 "Credits:\n"\r
 979                 "fDave: Cyclone 68000 core,\n"\r
 980                 "      base code of PicoDrive\n"\r
 981                 "Reesy & FluBBa: DrZ80 core\n"\r
 982                 "MAME devs: YM2612 and SN76496 cores\n"\r
 983                 "rlyeh and others: minimal SDK\n"\r
 984                 "Squidge: mmuhack\n"\r
 985                 "Dzz: ARM940 sample\n"\r
 986                 "GnoStiC / Puck2099: USB joy code\n"\r
 987                 "craigix: GP2X hardware\n"\r
 988                 "ketchupgun: skin design\n"\r
 989                 "\n"\r
 990                 "special thanks (for docs, ideas):\n"\r
 991                 " Charles MacDonald, Haze,\n"\r
 992                 " Stephane Dallongeville,\n"\r
 993                 " Lordus, Exophase, Rokas,\n"\r
 994                 " Nemesis, Tasco Deluxe";\r
 995 }\r