pandora/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 <unistd.h>\r
   8 \r
   9 #include "../common/emu.h"\r
  10 #include "../common/menu.h"\r
  11 #include "../common/plat.h"\r
  12 #include "../common/arm_utils.h"\r
  13 #include "../linux/sndout_oss.h"\r
  14 #include "../linux/fbdev.h"\r
  15 #include "asm_utils.h"\r
  16 #include "version.h"\r
  17 \r
  18 #include <pico/pico_int.h>\r
  19 \r
  20 \r
  21 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
  22 static unsigned char temp_frame[g_screen_width * g_screen_height * 2];\r
  23 unsigned char *PicoDraw2FB = temp_frame;\r
  24 const char *renderer_names[] = { NULL };\r
  25 const char *renderer_names32x[] = { NULL };\r
  26 char cpu_clk_name[] = "Max CPU clock";\r
  27 \r
  28 enum {\r
  29         SCALE_1x1,\r
  30         SCALE_2x2_3x2,\r
  31         SCALE_2x2_2x2,\r
  32 };\r
  33 \r
  34 static int get_cpu_clock(void)\r
  35 {\r
  36         FILE *f;\r
  37         int ret = 0;\r
  38         f = fopen("/proc/pandora/cpu_mhz_max", "r");\r
  39         if (f) {\r
  40                 fscanf(f, "%d", &ret);\r
  41                 fclose(f);\r
  42         }\r
  43         return ret;\r
  44 }\r
  45 \r
  46 void pemu_prep_defconfig(void)\r
  47 {\r
  48         // XXX: move elsewhere\r
  49         g_menubg_ptr = temp_frame;\r
  50 \r
  51         defaultConfig.EmuOpt |= EOPT_VSYNC;\r
  52         defaultConfig.s_PicoOpt |= POPT_EN_MCD_GFX|POPT_EN_MCD_PSYNC;\r
  53         defaultConfig.scaling = SCALE_2x2_3x2;\r
  54 }\r
  55 \r
  56 void pemu_validate_config(void)\r
  57 {\r
  58         currentConfig.CPUclock = get_cpu_clock();\r
  59 }\r
  60 \r
  61 // FIXME: cleanup\r
  62 static void osd_text(int x, int y, const char *text)\r
  63 {\r
  64         int len = strlen(text)*8;\r
  65 \r
  66         if (0) {\r
  67                 int *p, i, h;\r
  68                 x &= ~3; // align x\r
  69                 len = (len+3) >> 2;\r
  70                 for (h = 0; h < 8; h++) {\r
  71                         p = (int *) ((unsigned char *) g_screen_ptr+x+g_screen_width*(y+h));\r
  72                         for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
  73                 }\r
  74                 emu_text_out8(x, y, text);\r
  75         } else {\r
  76                 int *p, i, h;\r
  77                 x &= ~1; // align x\r
  78                 len++;\r
  79                 for (h = 0; h < 16; h++) {\r
  80                         p = (int *) ((unsigned short *) g_screen_ptr+x+g_screen_width*(y+h));\r
  81                         for (i = len; i; i--, p++) *p = 0;//(*p>>2)&0x39e7;\r
  82                 }\r
  83                 text_out16(x, y, text);\r
  84         }\r
  85 }\r
  86 \r
  87 static void draw_cd_leds(void)\r
  88 {\r
  89 //      static\r
  90         int old_reg;\r
  91 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
  92         old_reg = Pico_mcd->s68k_regs[0];\r
  93 \r
  94         if (0) {\r
  95                 // 8-bit modes\r
  96                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
  97                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
  98                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*2+ 4) =\r
  99                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*3+ 4) =\r
 100                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*4+ 4) = col_g;\r
 101                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*2+12) =\r
 102                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*3+12) =\r
 103                 *(unsigned int *)((char *)g_screen_ptr + g_screen_width*4+12) = col_r;\r
 104         } else {\r
 105                 // 16-bit modes\r
 106                 unsigned int *p = (unsigned int *)((short *)g_screen_ptr + g_screen_width*2+4);\r
 107                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 108                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 109                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += g_screen_width/2 - 12/2;\r
 110                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += g_screen_width/2 - 12/2;\r
 111                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 112         }\r
 113 }\r
 114 \r
 115 static int emuscan_1x1(unsigned int num)\r
 116 {\r
 117         DrawLineDest = (unsigned short *)g_screen_ptr +\r
 118                 g_screen_width * g_screen_height / 2 - g_screen_width * 240 / 2 +\r
 119                 num*g_screen_width + g_screen_width/2 - 320/2;\r
 120 \r
 121         return 0;\r
 122 }\r
 123 \r
 124 #define MAKE_EMUSCAN(name_, clut_name_, offs_, len_)            \\r
 125 static int name_(unsigned int num)                              \\r
 126 {                                                               \\r
 127         unsigned char  *ps = HighCol+8;                         \\r
 128         unsigned short *pd, *pal = HighPal;                     \\r
 129         int sh = Pico.video.reg[0xC] & 8;                       \\r
 130         int mask = 0xff;                                        \\r
 131                                                                 \\r
 132         pd = (unsigned short *)g_screen_ptr + num*800*2 + offs_;\\r
 133                                                                 \\r
 134         if (Pico.m.dirtyPal)                                    \\r
 135                 PicoDoHighPal555(sh);                           \\r
 136                                                                 \\r
 137         if (!sh && (rendstatus & PDRAW_SPR_LO_ON_HI))           \\r
 138                 mask = 0x3f; /* upper bits are priority stuff */\\r
 139                                                                 \\r
 140         clut_line##clut_name_(pd, ps, pal, (mask<<16) | len_);  \\r
 141                                                                 \\r
 142         return 0;                                               \\r
 143 }\r
 144 \r
 145 MAKE_EMUSCAN(emuscan_2x2_40, 2x2, 800/2 - 320*2/2, 320)\r
 146 MAKE_EMUSCAN(emuscan_2x2_32, 2x2, 800/2 - 256*2/2, 256)\r
 147 MAKE_EMUSCAN(emuscan_3x2_32, 3x2, 800/2 - 256*3/2, 256)\r
 148 \r
 149 #if 0 /* FIXME */\r
 150 static int EmuScanEnd16_32x(unsigned int num)\r
 151 {\r
 152         unsigned int *ps;\r
 153         unsigned int *pd;\r
 154         int len;\r
 155 \r
 156         ps = (unsigned int *)temp_frame;\r
 157         pd = (unsigned int *)g_screen_ptr + (num*800*2 + 800/2 - 320*2/2) / 2;\r
 158 \r
 159         for (len = 320/2; len > 0; len--, ps++) {\r
 160                 unsigned int p, p1;\r
 161                 p1 = *ps;\r
 162                 p = p1 << 16;\r
 163                 p |= p >> 16;\r
 164                 *pd = pd[800/2] = p;\r
 165                 pd++;\r
 166 \r
 167                 p = p1 >> 16;\r
 168                 p |= p << 16;\r
 169                 *pd = pd[800/2] = p;\r
 170                 pd++;\r
 171         }\r
 172 \r
 173         return 0;\r
 174 }\r
 175 #endif\r
 176 \r
 177 void pemu_finalize_frame(const char *fps, const char *notice)\r
 178 {\r
 179         if (notice || (currentConfig.EmuOpt & EOPT_SHOW_FPS)) {\r
 180                 if (notice)\r
 181                         osd_text(4, 464, notice);\r
 182                 if (currentConfig.EmuOpt & EOPT_SHOW_FPS)\r
 183                         osd_text(640, 464, fps);\r
 184         }\r
 185         if ((PicoAHW & PAHW_MCD) && (currentConfig.EmuOpt & EOPT_EN_CD_LEDS))\r
 186                 draw_cd_leds();\r
 187 }\r
 188 \r
 189 void plat_video_toggle_renderer(int change, int is_menu)\r
 190 {\r
 191         // this will auto-select SMS/32X renderers\r
 192         PicoDrawSetOutFormat(PDF_RGB555, 1);\r
 193 }\r
 194 \r
 195 void plat_video_menu_enter(int is_rom_loaded)\r
 196 {\r
 197 }\r
 198 \r
 199 void plat_video_menu_begin(void)\r
 200 {\r
 201         memcpy32(g_screen_ptr, g_menubg_ptr, g_screen_width * g_screen_height * 2 / 4);\r
 202 }\r
 203 \r
 204 void plat_video_menu_end(void)\r
 205 {\r
 206         plat_video_flip();\r
 207 }\r
 208 \r
 209 void plat_status_msg_clear(void)\r
 210 {\r
 211         int s = g_screen_width * g_screen_height * 2;\r
 212         int l = g_screen_width * 16 * 2;\r
 213         int i;\r
 214 \r
 215         for (i = 0; i < fbdev_buffer_count; i++)\r
 216                 memset32((int *)((char *)fbdev_buffers[i] + s - l), 0, l / 4);\r
 217 }\r
 218 \r
 219 void plat_status_msg_busy_next(const char *msg)\r
 220 {\r
 221         plat_status_msg_clear();\r
 222         pemu_finalize_frame("", msg);\r
 223         plat_video_flip();\r
 224         emu_status_msg("");\r
 225         reset_timing = 1;\r
 226 }\r
 227 \r
 228 void plat_status_msg_busy_first(const char *msg)\r
 229 {\r
 230 //      memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
 231         plat_status_msg_busy_next(msg);\r
 232 }\r
 233 \r
 234 void plat_update_volume(int has_changed, int is_up)\r
 235 {\r
 236         static int prev_frame = 0, wait_frames = 0;\r
 237         int vol = currentConfig.volume;\r
 238 \r
 239         if (has_changed)\r
 240         {\r
 241                 if (is_up) {\r
 242                         if (vol < 99) vol++;\r
 243                 } else {\r
 244                         if (vol >  0) vol--;\r
 245                 }\r
 246                 wait_frames = 0;\r
 247                 sndout_oss_setvol(vol, vol);\r
 248                 currentConfig.volume = vol;\r
 249                 emu_status_msg("VOL: %02i", vol);\r
 250                 prev_frame = Pico.m.frame_count;\r
 251         }\r
 252 }\r
 253 \r
 254 void pemu_forced_frame(int opts, int no_scale)\r
 255 {\r
 256         int oldscale = currentConfig.scaling;\r
 257         int po_old = PicoOpt;\r
 258 \r
 259         if (no_scale) {\r
 260                 currentConfig.scaling = SCALE_1x1;\r
 261                 emu_video_mode_change(0, 0, 0);\r
 262         }\r
 263 \r
 264         PicoOpt &= ~POPT_ALT_RENDERER;\r
 265         PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
 266 \r
 267         Pico.m.dirtyPal = 1;\r
 268         PicoFrameDrawOnly();\r
 269 \r
 270         PicoOpt = po_old;\r
 271         currentConfig.scaling = oldscale;\r
 272 }\r
 273 \r
 274 static void updateSound(int len)\r
 275 {\r
 276         unsigned int t;\r
 277 \r
 278         len <<= 1;\r
 279         if (PicoOpt & POPT_EN_STEREO)\r
 280                 len <<= 1;\r
 281 \r
 282         // sndout_oss_can_write() not reliable..\r
 283         if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))\r
 284                 return;\r
 285 \r
 286         /* avoid writing audio when lagging behind to prevent audio lag */\r
 287         if (PicoSkipFrame == 2)\r
 288                 return;\r
 289 \r
 290         t = plat_get_ticks_ms();\r
 291         sndout_oss_write(PsndOut, len);\r
 292         t = plat_get_ticks_ms() - t;\r
 293         if (t > 1)\r
 294                 printf("audio lag %u\n", t);\r
 295 }\r
 296 \r
 297 void pemu_sound_start(void)\r
 298 {\r
 299         int target_fps = Pico.m.pal ? 50 : 60;\r
 300 \r
 301         PsndOut = NULL;\r
 302 \r
 303         if (currentConfig.EmuOpt & EOPT_EN_SOUND)\r
 304         {\r
 305                 int snd_excess_add, frame_samples;\r
 306                 int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;\r
 307 \r
 308                 PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 309 \r
 310                 frame_samples = PsndLen;\r
 311                 snd_excess_add = ((PsndRate - PsndLen * target_fps)<<16) / target_fps;\r
 312                 if (snd_excess_add != 0)\r
 313                         frame_samples++;\r
 314 \r
 315                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 316                         PsndRate, PsndLen, snd_excess_add, is_stereo, Pico.m.pal);\r
 317                 sndout_oss_start(PsndRate, frame_samples * 2, is_stereo);\r
 318                 //sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
 319                 PicoWriteSound = updateSound;\r
 320                 plat_update_volume(0, 0);\r
 321                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 322                 PsndOut = sndBuffer;\r
 323         }\r
 324 }\r
 325 \r
 326 void pemu_sound_stop(void)\r
 327 {\r
 328         sndout_oss_stop();\r
 329 }\r
 330 \r
 331 void pemu_sound_wait(void)\r
 332 {\r
 333         // don't need to do anything, writes will block by themselves\r
 334 }\r
 335 \r
 336 void plat_debug_cat(char *str)\r
 337 {\r
 338 }\r
 339 \r
 340 void emu_video_mode_change(int start_line, int line_count, int is_32cols)\r
 341 {\r
 342         int i;\r
 343 \r
 344         // clear whole screen in all buffers\r
 345         for (i = 0; i < fbdev_buffer_count; i++)\r
 346                 memset32(fbdev_buffers[i], 0, g_screen_width * g_screen_height * 2 / 4);\r
 347 \r
 348         PicoScanBegin = NULL;\r
 349         PicoScanEnd = NULL;\r
 350 \r
 351 #if 0\r
 352         if (PicoAHW & PAHW_32X) {\r
 353                 /* FIXME */\r
 354                 DrawLineDest = (unsigned short *)temp_frame;\r
 355                 PicoDrawSetOutFormat(PDF_RGB555, 1);\r
 356                 PicoScanEnd = EmuScanEnd16_32x;\r
 357         } else\r
 358 #endif\r
 359         {\r
 360                 switch (currentConfig.scaling) {\r
 361                 case SCALE_1x1:\r
 362                         PicoDrawSetOutFormat(PDF_RGB555, 1);\r
 363                         PicoScanBegin = emuscan_1x1;\r
 364                         break;\r
 365                 case SCALE_2x2_3x2:\r
 366                         PicoDrawSetOutFormat(PDF_NONE, 0);\r
 367                         PicoScanEnd = is_32cols ? emuscan_3x2_32 : emuscan_2x2_40;\r
 368                         break;\r
 369                 case SCALE_2x2_2x2:\r
 370                         PicoDrawSetOutFormat(PDF_NONE, 0);\r
 371                         PicoScanEnd = is_32cols ? emuscan_2x2_32 : emuscan_2x2_40;\r
 372                         break;\r
 373                 }\r
 374         }\r
 375 }\r
 376 \r
 377 void pemu_loop_prep(void)\r
 378 {\r
 379         if (currentConfig.CPUclock != get_cpu_clock()) {\r
 380                 char buf[64];\r
 381                 snprintf(buf, sizeof(buf), "sudo /usr/pandora/scripts/op_cpuspeed.sh %d",\r
 382                         currentConfig.CPUclock);\r
 383                 system(buf);\r
 384         }\r
 385 \r
 386         pemu_sound_start();\r
 387 }\r
 388 \r
 389 void pemu_loop_end(void)\r
 390 {\r
 391         int po_old = PicoOpt;\r
 392         int eo_old = currentConfig.EmuOpt;\r
 393 \r
 394         pemu_sound_stop();\r
 395         memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
 396 \r
 397         /* do one more frame for menu bg */\r
 398         PicoOpt &= ~POPT_ALT_RENDERER;\r
 399         PicoOpt |= POPT_EN_SOFTSCALE|POPT_ACC_SPRITES;\r
 400         currentConfig.EmuOpt |= EOPT_16BPP;\r
 401 \r
 402         PicoDrawSetOutFormat(PDF_RGB555, 1);\r
 403         Pico.m.dirtyPal = 1;\r
 404         PicoFrame();\r
 405 \r
 406         PicoOpt = po_old;\r
 407         currentConfig.EmuOpt = eo_old;\r
 408 }\r
 409 \r
 410 void plat_wait_till_us(unsigned int us_to)\r
 411 {\r
 412         unsigned int now;\r
 413         signed int diff;\r
 414 \r
 415         now = plat_get_ticks_us();\r
 416 \r
 417         // XXX: need to check NOHZ\r
 418         diff = (signed int)(us_to - now);\r
 419         if (diff > 10000) {\r
 420                 //printf("sleep %d\n", us_to - now);\r
 421                 usleep(diff * 15 / 16);\r
 422                 now = plat_get_ticks_us();\r
 423                 //printf(" wake %d\n", (signed)(us_to - now));\r
 424         }\r
 425 /*\r
 426         while ((signed int)(us_to - now) > 512) {\r
 427                 spend_cycles(1024);\r
 428                 now = plat_get_ticks_us();\r
 429         }\r
 430 */\r
 431 }\r
 432 \r
 433 const char *plat_get_credits(void)\r
 434 {\r
 435         return "PicoDrive v" VERSION " (c) notaz, 2006-2010\n\n\n"\r
 436                 "Credits:\n"\r
 437                 "fDave: Cyclone 68000 core,\n"\r
 438                 "      base code of PicoDrive\n"\r
 439                 "Reesy & FluBBa: DrZ80 core\n"\r
 440                 "MAME devs: YM2612 and SN76496 cores\n"\r
 441                 "Pandora team: Pandora\n"\r
 442                 "Inder, ketchupgun: graphics\n"\r
 443                 "\n"\r
 444                 "special thanks (for docs, ideas):\n"\r
 445                 " Charles MacDonald, Haze,\n"\r
 446                 " Stephane Dallongeville,\n"\r
 447                 " Lordus, Exophase, Rokas,\n"\r
 448                 " Nemesis, Tasco Deluxe";\r
 449 }\r