psp/emu.c

   1 // (c) Copyright 2007 notaz, All rights reserved.
   2 // Free for non-commercial use.
   3
   4 // For commercial use, separate licencing terms must be obtained.
   5
   6 #include <sys/stat.h>
   7 #include <sys/types.h>
   8 #include <sys/syslimits.h> // PATH_MAX
   9
  10 #include <pspthreadman.h>
  11 #include <pspdisplay.h>
  12 #include <psputils.h>
  13 #include <pspgu.h>
  14 #include <pspaudio.h>
  15
  16 #include "psp.h"
  17 #include "menu.h"
  18 #include "emu.h"
  19 #include "mp3.h"
  20 #include "asm_utils.h"
  21 #include "../common/emu.h"
  22 #include "../common/config.h"
  23 #include "../common/lprintf.h"
  24 #include <pico/pico_int.h>
  25 #include <pico/cd/cue.h>
  26
  27 #define OSD_FPS_X 432
  28
  29 // additional pspaudio imports, credits to crazyc
  30 int sceAudio_38553111(unsigned short samples, unsigned short freq, char unknown);  // play with conversion?
  31 int sceAudio_5C37C0AE(void);                            // end play?
  32 int sceAudio_E0727056(int volume, void *buffer);        // blocking output
  33 int sceAudioOutput2GetRestSample();
  34
  35
  36 unsigned char *PicoDraw2FB = (unsigned char *)VRAM_CACHED_STUFF + 8; // +8 to be able to skip border with 1 quadword..
  37 int engineStateSuspend;
  38
  39 static unsigned int noticeMsgTime = 0;
  40 int reset_timing = 0; // do we need this?
  41
  42 #define PICO_PEN_ADJUST_X 4
  43 #define PICO_PEN_ADJUST_Y 2
  44 static int pico_pen_x = 320/2, pico_pen_y = 240/2;
  45
  46 static void sound_init(void);
  47 static void sound_deinit(void);
  48 static void blit2(const char *fps, const char *notice, int lagging_behind);
  49 static void clearArea(int full);
  50
  51 void emu_noticeMsgUpdated(void)
  52 {
  53         noticeMsgTime = sceKernelGetSystemTimeLow();
  54 }
  55
  56 int emu_getMainDir(char *dst, int len)
  57 {
  58         if (len > 0) *dst = 0;
  59         return 0;
  60 }
  61
  62 static void osd_text(int x, const char *text, int is_active, int clear_all)
  63 {
  64         unsigned short *screen = is_active ? psp_video_get_active_fb() : psp_screen;
  65         int len = clear_all ? (480 / 2) : (strlen(text) * 8 / 2);
  66         int *p, h;
  67         void *tmp;
  68         for (h = 0; h < 8; h++) {
  69                 p = (int *) (screen+x+512*(264+h));
  70                 p = (int *) ((int)p & ~3); // align
  71                 memset32_uncached(p, 0, len);
  72         }
  73         if (is_active) { tmp = psp_screen; psp_screen = screen; } // nasty pointer tricks
  74         emu_textOut16(x, 264, text);
  75         if (is_active) psp_screen = tmp;
  76 }
  77
  78 void emu_msg_cb(const char *msg)
  79 {
  80         osd_text(4, msg, 1, 1);
  81         noticeMsgTime = sceKernelGetSystemTimeLow() - 2000000;
  82
  83         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  84         reset_timing = 1;
  85 }
  86
  87 static void emu_msg_tray_open(void)
  88 {
  89         strcpy(noticeMsg, "CD tray opened");
  90         noticeMsgTime = sceKernelGetSystemTimeLow();
  91 }
  92
  93
  94 void emu_Init(void)
  95 {
  96         // make dirs for saves, cfgs, etc.
  97         mkdir("mds", 0777);
  98         mkdir("srm", 0777);
  99         mkdir("brm", 0777);
 100         mkdir("cfg", 0777);
 101
 102         sound_init();
 103
 104         PicoInit();
 105         PicoMessage = emu_msg_cb;
 106         PicoMCDopenTray = emu_msg_tray_open;
 107         PicoMCDcloseTray = menu_loop_tray;
 108 }
 109
 110 void emu_Deinit(void)
 111 {
 112         // save SRAM
 113         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 114                 emu_SaveLoadGame(0, 1);
 115                 SRam.changed = 0;
 116         }
 117
 118         if (!(currentConfig.EmuOpt & 0x20))
 119                 config_writelrom(PicoConfigFile);
 120
 121         PicoExit();
 122         sound_deinit();
 123 }
 124
 125 void emu_prepareDefaultConfig(void)
 126 {
 127         memset(&defaultConfig, 0, sizeof(defaultConfig));
 128         defaultConfig.EmuOpt    = 0x1d | 0x680; // | <- confirm_save, cd_leds, acc rend
 129         defaultConfig.s_PicoOpt = 0x0f | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX|POPT_ACC_SPRITES;
 130         defaultConfig.s_PsndRate = 22050;
 131         defaultConfig.s_PicoRegion = 0; // auto
 132         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
 133         defaultConfig.s_PicoCDBuffers = 64;
 134         defaultConfig.Frameskip = -1; // auto
 135         defaultConfig.CPUclock = 333;
 136         defaultConfig.KeyBinds[ 4] = 1<<0; // SACB RLDU
 137         defaultConfig.KeyBinds[ 6] = 1<<1;
 138         defaultConfig.KeyBinds[ 7] = 1<<2;
 139         defaultConfig.KeyBinds[ 5] = 1<<3;
 140         defaultConfig.KeyBinds[14] = 1<<4;
 141         defaultConfig.KeyBinds[13] = 1<<5;
 142         defaultConfig.KeyBinds[15] = 1<<6;
 143         defaultConfig.KeyBinds[ 3] = 1<<7;
 144         defaultConfig.KeyBinds[12] = 1<<26; // switch rnd
 145         defaultConfig.KeyBinds[ 8] = 1<<27; // save state
 146         defaultConfig.KeyBinds[ 9] = 1<<28; // load state
 147         defaultConfig.KeyBinds[28] = 1<<0; // num "buttons"
 148         defaultConfig.KeyBinds[30] = 1<<1;
 149         defaultConfig.KeyBinds[31] = 1<<2;
 150         defaultConfig.KeyBinds[29] = 1<<3;
 151         defaultConfig.scaling = 1;     // bilinear filtering for psp
 152         defaultConfig.scale = 1.20;    // fullscreen
 153         defaultConfig.hscale40 = 1.25;
 154         defaultConfig.hscale32 = 1.56;
 155         defaultConfig.turbo_rate = 15;
 156 }
 157
 158
 159 extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
 160 extern void amips_clut_6bit(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
 161
 162 static void (*amips_clut_f)(unsigned short *dst, unsigned char *src, unsigned short *pal, int count) = NULL;
 163
 164 struct Vertex
 165 {
 166         short u,v;
 167         short x,y,z;
 168 };
 169
 170 static struct Vertex __attribute__((aligned(4))) g_vertices[2];
 171 static unsigned short __attribute__((aligned(16))) localPal[0x100];
 172 static int dynamic_palette = 0, need_pal_upload = 0, blit_16bit_mode = 0;
 173 static int fbimg_offs = 0;
 174
 175 static void set_scaling_params(void)
 176 {
 177         int src_width, fbimg_width, fbimg_height, fbimg_xoffs, fbimg_yoffs, border_hack = 0;
 178         g_vertices[0].x = g_vertices[0].y =
 179         g_vertices[0].z = g_vertices[1].z = 0;
 180
 181         fbimg_height = (int)(240.0 * currentConfig.scale + 0.5);
 182         if (Pico.video.reg[12] & 1) {
 183                 fbimg_width = (int)(320.0 * currentConfig.scale * currentConfig.hscale40 + 0.5);
 184                 src_width = 320;
 185         } else {
 186                 fbimg_width = (int)(256.0 * currentConfig.scale * currentConfig.hscale32 + 0.5);
 187                 src_width = 256;
 188         }
 189
 190         if (fbimg_width  & 1) fbimg_width++;  // make even
 191         if (fbimg_height & 1) fbimg_height++;
 192
 193         if (fbimg_width >= 480) {
 194                 g_vertices[0].u = (fbimg_width-480)/2;
 195                 g_vertices[1].u = src_width - (fbimg_width-480)/2 - 1;
 196                 fbimg_width = 480;
 197                 fbimg_xoffs = 0;
 198         } else {
 199                 g_vertices[0].u = 0;
 200                 g_vertices[1].u = src_width;
 201                 fbimg_xoffs = 240 - fbimg_width/2;
 202         }
 203         if (fbimg_width > 320 && fbimg_width <= 480) border_hack = 1;
 204
 205         if (fbimg_height >= 272) {
 206                 g_vertices[0].v = (fbimg_height-272)/2;
 207                 g_vertices[1].v = 240 - (fbimg_height-272)/2;
 208                 fbimg_height = 272;
 209                 fbimg_yoffs = 0;
 210         } else {
 211                 g_vertices[0].v = 0;
 212                 g_vertices[1].v = 240;
 213                 fbimg_yoffs = 136 - fbimg_height/2;
 214         }
 215
 216         g_vertices[1].x = fbimg_width;
 217         g_vertices[1].y = fbimg_height;
 218         if (fbimg_xoffs < 0) fbimg_xoffs = 0;
 219         if (fbimg_yoffs < 0) fbimg_yoffs = 0;
 220         if (border_hack) {
 221                 g_vertices[0].u++;
 222                 g_vertices[0].x++;
 223                 g_vertices[1].u--;
 224                 g_vertices[1].x--;
 225         }
 226         fbimg_offs = (fbimg_yoffs*512 + fbimg_xoffs) * 2; // dst is always 16bit
 227
 228         /*
 229         lprintf("set_scaling_params:\n");
 230         lprintf("offs: %i, %i\n", fbimg_xoffs, fbimg_yoffs);
 231         lprintf("xy0, xy1: %i, %i; %i, %i\n", g_vertices[0].x, g_vertices[0].y, g_vertices[1].x, g_vertices[1].y);
 232         lprintf("uv0, uv1: %i, %i; %i, %i\n", g_vertices[0].u, g_vertices[0].v, g_vertices[1].u, g_vertices[1].v);
 233         */
 234 }
 235
 236 static void do_pal_update(int allow_sh, int allow_as)
 237 {
 238         unsigned int *dpal=(void *)localPal;
 239         int i;
 240
 241         //for (i = 0x3f/2; i >= 0; i--)
 242         //      dpal[i] = ((spal[i]&0x000f000f)<< 1)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)<<4);
 243         do_pal_convert(localPal, Pico.cram, currentConfig.gamma, currentConfig.gamma2);
 244
 245         Pico.m.dirtyPal = 0;
 246         need_pal_upload = 1;
 247
 248         if (allow_sh && (Pico.video.reg[0xC]&8)) // shadow/hilight?
 249         {
 250                 // shadowed pixels
 251                 for (i = 0x3f/2; i >= 0; i--)
 252                         dpal[0x20|i] = dpal[0x60|i] = (dpal[i]>>1)&0x7bcf7bcf;
 253                 // hilighted pixels
 254                 for (i = 0x3f; i >= 0; i--) {
 255                         int t=localPal[i]&0xf79e;t+=0x4208;
 256                         if (t&0x20) t|=0x1e;
 257                         if (t&0x800) t|=0x780;
 258                         if (t&0x10000) t|=0xf000;
 259                         t&=0xf79e;
 260                         localPal[0x80|i]=(unsigned short)t;
 261                 }
 262                 localPal[0xe0] = 0;
 263                 localPal[0xf0] = 0x001f;
 264         }
 265         else if (allow_as && (rendstatus & PDRAW_SPR_LO_ON_HI))
 266         {
 267                 memcpy32((int *)dpal+0x80/2, (void *)localPal, 0x40*2/4);
 268         }
 269 }
 270
 271 static void do_slowmode_lines(int line_to)
 272 {
 273         int line = 0, line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 274         unsigned short *dst = (unsigned short *)VRAM_STUFF + 512*240/2;
 275         unsigned char  *src = (unsigned char  *)VRAM_CACHED_STUFF + 16;
 276         if (!(Pico.video.reg[1]&8)) { line = 8; dst += 512*8; src += 512*8; }
 277
 278         for (; line < line_to; line++, dst+=512, src+=512)
 279                 amips_clut_f(dst, src, localPal, line_len);
 280 }
 281
 282 static void EmuScanPrepare(void)
 283 {
 284         HighCol = (unsigned char *)VRAM_CACHED_STUFF + 8;
 285         if (!(Pico.video.reg[1]&8)) HighCol += 8*512;
 286
 287         if (dynamic_palette > 0)
 288                 dynamic_palette--;
 289
 290         if (Pico.m.dirtyPal)
 291                 do_pal_update(1, 1);
 292         if ((rendstatus & PDRAW_SPR_LO_ON_HI) && !(Pico.video.reg[0xC]&8))
 293              amips_clut_f = amips_clut_6bit;
 294         else amips_clut_f = amips_clut;
 295 }
 296
 297 static int EmuScanSlowBegin(unsigned int num)
 298 {
 299         if (!(Pico.video.reg[1]&8)) num += 8;
 300
 301         if (!dynamic_palette)
 302                 HighCol = (unsigned char *)VRAM_CACHED_STUFF + num * 512 + 8;
 303
 304         return 0;
 305 }
 306
 307 static int EmuScanSlowEnd(unsigned int num)
 308 {
 309         if (!(Pico.video.reg[1]&8)) num += 8;
 310
 311         if (Pico.m.dirtyPal) {
 312                 if (!dynamic_palette) {
 313                         do_slowmode_lines(num);
 314                         dynamic_palette = 3; // last for 2 more frames
 315                 }
 316                 do_pal_update(1, 1);
 317         }
 318
 319         if (dynamic_palette) {
 320                 int line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 321                 void *dst = (char *)VRAM_STUFF + 512*240 + 512*2*num;
 322                 amips_clut_f(dst, HighCol + 8, localPal, line_len);
 323         }
 324
 325         return 0;
 326 }
 327
 328 static void blitscreen_clut(void)
 329 {
 330         int offs = fbimg_offs;
 331         offs += (psp_screen == VRAM_FB0) ? VRAMOFFS_FB0 : VRAMOFFS_FB1;
 332
 333         sceGuSync(0,0); // sync with prev
 334         sceGuStart(GU_DIRECT, guCmdList);
 335         sceGuDrawBuffer(GU_PSM_5650, (void *)offs, 512); // point to back buffer
 336
 337         if (dynamic_palette)
 338         {
 339                 if (!blit_16bit_mode) { // the current mode is not 16bit
 340                         sceGuTexMode(GU_PSM_5650, 0, 0, 0);
 341                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 512*240);
 342
 343                         blit_16bit_mode = 1;
 344                 }
 345         }
 346         else
 347         {
 348                 if (blit_16bit_mode) {
 349                         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 350                         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 351                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 352                         blit_16bit_mode = 0;
 353                 }
 354
 355                 if ((PicoOpt&0x10) && Pico.m.dirtyPal)
 356                         do_pal_update(0, 0);
 357
 358                 sceKernelDcacheWritebackAll();
 359
 360                 if (need_pal_upload) {
 361                         need_pal_upload = 0;
 362                         sceGuClutLoad((256/8), localPal); // upload 32*8 entries (256)
 363                 }
 364         }
 365
 366 #if 1
 367         if (g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x)
 368         {
 369                 struct Vertex* vertices;
 370                 int x;
 371
 372                 #define SLICE_WIDTH 32
 373                 for (x = 0; x < g_vertices[1].x; x += SLICE_WIDTH)
 374                 {
 375                         // render sprite
 376                         vertices = (struct Vertex*)sceGuGetMemory(2 * sizeof(struct Vertex));
 377                         memcpy(vertices, g_vertices, 2 * sizeof(struct Vertex));
 378                         vertices[0].u = vertices[0].x = x;
 379                         vertices[1].u = vertices[1].x = x + SLICE_WIDTH;
 380                         sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,vertices);
 381                 }
 382                 // lprintf("listlen: %iB\n", sceGuCheckList()); // ~480 only
 383         }
 384         else
 385 #endif
 386                 sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,g_vertices);
 387
 388         sceGuFinish();
 389 }
 390
 391
 392 static void cd_leds(void)
 393 {
 394         unsigned int reg, col_g, col_r, *p;
 395
 396         reg = Pico_mcd->s68k_regs[0];
 397
 398         p = (unsigned int *)((short *)psp_screen + 512*2+4+2);
 399         col_g = (reg & 2) ? 0x06000600 : 0;
 400         col_r = (reg & 1) ? 0x00180018 : 0;
 401         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 402         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 403         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 404 }
 405
 406 static void draw_pico_ptr(void)
 407 {
 408         unsigned char *p = (unsigned char *)VRAM_STUFF + 16;
 409
 410         // only if pen enabled and for 8bit mode
 411         if (pico_inp_mode == 0 || blit_16bit_mode) return;
 412
 413         p += 512 * (pico_pen_y + PICO_PEN_ADJUST_Y);
 414         p += pico_pen_x + PICO_PEN_ADJUST_X;
 415         p[  -1] = 0xe0; p[   0] = 0xf0; p[   1] = 0xe0;
 416         p[ 511] = 0xf0; p[ 512] = 0xf0; p[ 513] = 0xf0;
 417         p[1023] = 0xe0; p[1024] = 0xf0; p[1025] = 0xe0;
 418 }
 419
 420
 421 #if 0
 422 static void dbg_text(void)
 423 {
 424         int *p, h, len;
 425         char text[128];
 426
 427         sprintf(text, "sl: %i, 16b: %i", g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x, blit_16bit_mode);
 428         len = strlen(text) * 8 / 2;
 429         for (h = 0; h < 8; h++) {
 430                 p = (int *) ((unsigned short *) psp_screen+2+512*(256+h));
 431                 p = (int *) ((int)p & ~3); // align
 432                 memset32_uncached(p, 0, len);
 433         }
 434         emu_textOut16(2, 256, text);
 435 }
 436 #endif
 437
 438 /* called after rendering is done, but frame emulation is not finished */
 439 void blit1(void)
 440 {
 441         if (PicoOpt&0x10)
 442         {
 443                 int i;
 444                 unsigned char *pd;
 445                 // clear top and bottom trash
 446                 for (pd = PicoDraw2FB+8, i = 8; i > 0; i--, pd += 512)
 447                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 448                 for (pd = PicoDraw2FB+512*232+8, i = 8; i > 0; i--, pd += 512)
 449                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 450         }
 451
 452         if (PicoAHW & PAHW_PICO)
 453                 draw_pico_ptr();
 454
 455         blitscreen_clut();
 456 }
 457
 458
 459 static void blit2(const char *fps, const char *notice, int lagging_behind)
 460 {
 461         int vsync = 0, emu_opt = currentConfig.EmuOpt;
 462
 463         if (notice || (emu_opt & 2)) {
 464                 if (notice)      osd_text(4, notice, 0, 0);
 465                 if (emu_opt & 2) osd_text(OSD_FPS_X, fps, 0, 0);
 466         }
 467
 468         //dbg_text();
 469
 470         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
 471                 cd_leds();
 472
 473         if (currentConfig.EmuOpt & 0x2000) { // want vsync
 474                 if (!(currentConfig.EmuOpt & 0x10000) || !lagging_behind) vsync = 1;
 475         }
 476
 477         psp_video_flip(vsync);
 478 }
 479
 480 // clears whole screen or just the notice area (in all buffers)
 481 static void clearArea(int full)
 482 {
 483         if (full) {
 484                 memset32_uncached(psp_screen, 0, 512*272*2/4);
 485                 psp_video_flip(0);
 486                 memset32_uncached(psp_screen, 0, 512*272*2/4);
 487                 memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*240/4);
 488                 memset32((int *)VRAM_CACHED_STUFF+512*240/4, 0, 512*240*2/4);
 489         } else {
 490                 void *fb = psp_video_get_active_fb();
 491                 memset32_uncached((int *)((char *)psp_screen + 512*264*2), 0, 512*8*2/4);
 492                 memset32_uncached((int *)((char *)fb         + 512*264*2), 0, 512*8*2/4);
 493         }
 494 }
 495
 496 static void vidResetMode(void)
 497 {
 498         // setup GU
 499         sceGuSync(0,0); // sync with prev
 500         sceGuStart(GU_DIRECT, guCmdList);
 501
 502         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 503         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 504         sceGuTexFunc(GU_TFX_REPLACE,GU_TCC_RGB);
 505         if (currentConfig.scaling)
 506              sceGuTexFilter(GU_LINEAR, GU_LINEAR);
 507         else sceGuTexFilter(GU_NEAREST, GU_NEAREST);
 508         sceGuTexScale(1.0f,1.0f);
 509         sceGuTexOffset(0.0f,0.0f);
 510
 511         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 512
 513         // slow rend.
 514         PicoDrawSetColorFormat(-1);
 515         PicoScanBegin = EmuScanSlowBegin;
 516         PicoScanEnd = EmuScanSlowEnd;
 517
 518         localPal[0xe0] = 0;
 519         localPal[0xf0] = 0x001f;
 520         Pico.m.dirtyPal = 1;
 521         blit_16bit_mode = dynamic_palette = 0;
 522
 523         sceGuFinish();
 524         set_scaling_params();
 525         sceGuSync(0,0);
 526 }
 527
 528 void emu_platformDebugCat(char *str)
 529 {
 530         strcat(str, blit_16bit_mode ? "soft clut\n" : "hard clut\n");
 531 }
 532
 533
 534 /* sound stuff */
 535 #define SOUND_BLOCK_SIZE_NTSC (1470*2) // 1024 // 1152
 536 #define SOUND_BLOCK_SIZE_PAL  (1764*2)
 537 #define SOUND_BLOCK_COUNT    8
 538
 539 static short __attribute__((aligned(4))) sndBuffer[SOUND_BLOCK_SIZE_PAL*SOUND_BLOCK_COUNT + 44100/50*2];
 540 static short *snd_playptr = NULL, *sndBuffer_endptr = NULL;
 541 static int samples_made = 0, samples_done = 0, samples_block = 0;
 542 static int sound_thread_exit = 0;
 543 static SceUID sound_sem = -1;
 544
 545 static void writeSound(int len);
 546
 547 static int sound_thread(SceSize args, void *argp)
 548 {
 549         int ret = 0;
 550
 551         lprintf("sthr: started, priority %i\n", sceKernelGetThreadCurrentPriority());
 552
 553         while (!sound_thread_exit)
 554         {
 555                 if (samples_made - samples_done < samples_block) {
 556                         // wait for data (use at least 2 blocks)
 557                         //lprintf("sthr: wait... (%i)\n", samples_made - samples_done);
 558                         while (samples_made - samples_done <= samples_block*2 && !sound_thread_exit)
 559                                 ret = sceKernelWaitSema(sound_sem, 1, 0);
 560                         if (ret < 0) lprintf("sthr: sceKernelWaitSema: %i\n", ret);
 561                         continue;
 562                 }
 563
 564                 // lprintf("sthr: got data: %i\n", samples_made - samples_done);
 565
 566                 ret = sceAudio_E0727056(PSP_AUDIO_VOLUME_MAX, snd_playptr);
 567
 568                 samples_done += samples_block;
 569                 snd_playptr  += samples_block;
 570                 if (snd_playptr >= sndBuffer_endptr)
 571                         snd_playptr = sndBuffer;
 572                 // 1.5 kernel returns 0, newer ones return # of samples queued
 573                 if (ret < 0)
 574                         lprintf("sthr: sceAudio_E0727056: %08x; pos %i/%i\n", ret, samples_done, samples_made);
 575
 576                 // shouln't happen, but just in case
 577                 if (samples_made - samples_done >= samples_block*3) {
 578                         //lprintf("sthr: block skip (%i)\n", samples_made - samples_done);
 579                         samples_done += samples_block; // skip
 580                         snd_playptr  += samples_block;
 581                 }
 582
 583         }
 584
 585         lprintf("sthr: exit\n");
 586         sceKernelExitDeleteThread(0);
 587         return 0;
 588 }
 589
 590 static void sound_init(void)
 591 {
 592         SceUID thid;
 593         int ret;
 594
 595         sound_sem = sceKernelCreateSema("sndsem", 0, 0, 1, NULL);
 596         if (sound_sem < 0) lprintf("sceKernelCreateSema() failed: %i\n", sound_sem);
 597
 598         samples_made = samples_done = 0;
 599         samples_block = SOUND_BLOCK_SIZE_NTSC; // make sure it goes to sema
 600         sound_thread_exit = 0;
 601         thid = sceKernelCreateThread("sndthread", sound_thread, 0x12, 0x10000, 0, NULL);
 602         if (thid >= 0)
 603         {
 604                 ret = sceKernelStartThread(thid, 0, 0);
 605                 if (ret < 0) lprintf("sound_init: sceKernelStartThread returned %08x\n", ret);
 606         }
 607         else
 608                 lprintf("sceKernelCreateThread failed: %i\n", thid);
 609 }
 610
 611 void emu_startSound(void)
 612 {
 613         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 614         int ret, stereo;
 615
 616         samples_made = samples_done = 0;
 617
 618         if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 619                 PsndRerate(Pico.m.frame_count ? 1 : 0);
 620         }
 621         stereo=(PicoOpt&8)>>3;
 622
 623         samples_block = Pico.m.pal ? SOUND_BLOCK_SIZE_PAL : SOUND_BLOCK_SIZE_NTSC;
 624         if (PsndRate <= 22050) samples_block /= 2;
 625         sndBuffer_endptr = &sndBuffer[samples_block*SOUND_BLOCK_COUNT];
 626
 627         lprintf("starting audio: %i, len: %i, stereo: %i, pal: %i, block samples: %i\n",
 628                         PsndRate, PsndLen, stereo, Pico.m.pal, samples_block);
 629
 630         // while (sceAudioOutput2GetRestSample() > 0) psp_msleep(100);
 631         // sceAudio_5C37C0AE();
 632         ret = sceAudio_38553111(samples_block/2, PsndRate, 2); // seems to not need that stupid 64byte alignment
 633         if (ret < 0) {
 634                 lprintf("sceAudio_38553111() failed: %i\n", ret);
 635                 sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 636                 noticeMsgTime = sceKernelGetSystemTimeLow();
 637                 currentConfig.EmuOpt &= ~4;
 638         } else {
 639                 PicoWriteSound = writeSound;
 640                 memset32((int *)(void *)sndBuffer, 0, sizeof(sndBuffer)/4);
 641                 snd_playptr = sndBuffer_endptr - samples_block;
 642                 samples_made = samples_block; // send 1 empty block first..
 643                 PsndOut = sndBuffer;
 644                 PsndRate_old = PsndRate;
 645                 PicoOpt_old  = PicoOpt;
 646                 pal_old = Pico.m.pal;
 647         }
 648 }
 649
 650 void emu_endSound(void)
 651 {
 652         int i;
 653         if (samples_done == 0)
 654         {
 655                 // if no data is written between sceAudio_38553111 and sceAudio_5C37C0AE calls,
 656                 // we get a deadlock on next sceAudio_38553111 call
 657                 // so this is yet another workaround:
 658                 memset32((int *)(void *)sndBuffer, 0, samples_block*4/4);
 659                 samples_made = samples_block * 3;
 660                 sceKernelSignalSema(sound_sem, 1);
 661         }
 662         sceKernelDelayThread(100*1000);
 663         samples_made = samples_done = 0;
 664         for (i = 0; sceAudioOutput2GetRestSample() > 0 && i < 16; i++)
 665                 psp_msleep(100);
 666         sceAudio_5C37C0AE();
 667 }
 668
 669 /* wait until we can write more sound */
 670 void emu_waitSound(void)
 671 {
 672         // TODO: test this
 673         while (!sound_thread_exit && samples_made - samples_done > samples_block * 4)
 674                 psp_msleep(10);
 675 }
 676
 677 static void sound_deinit(void)
 678 {
 679         sound_thread_exit = 1;
 680         sceKernelSignalSema(sound_sem, 1);
 681         sceKernelDeleteSema(sound_sem);
 682         sound_sem = -1;
 683 }
 684
 685 static void writeSound(int len)
 686 {
 687         int ret;
 688         if (PicoOpt&8) len<<=1;
 689
 690         PsndOut += len;
 691         /*if (PsndOut > sndBuffer_endptr) {
 692                 memcpy32((int *)(void *)sndBuffer, (int *)endptr, (PsndOut - endptr + 1) / 2);
 693                 PsndOut = &sndBuffer[PsndOut - endptr];
 694                 lprintf("mov\n");
 695         }
 696         else*/
 697         if (PsndOut > sndBuffer_endptr) lprintf("snd oflow %i!\n", PsndOut - sndBuffer_endptr);
 698         if (PsndOut >= sndBuffer_endptr)
 699                 PsndOut = sndBuffer;
 700
 701         // signal the snd thread
 702         samples_made += len;
 703         if (samples_made - samples_done > samples_block*2) {
 704                 // lprintf("signal, %i/%i\n", samples_done, samples_made);
 705                 ret = sceKernelSignalSema(sound_sem, 1);
 706                 //if (ret < 0) lprintf("snd signal ret %08x\n", ret);
 707         }
 708 }
 709
 710
 711 static void SkipFrame(void)
 712 {
 713         PicoSkipFrame=1;
 714         PicoFrame();
 715         PicoSkipFrame=0;
 716 }
 717
 718 void emu_forcedFrame(int opts)
 719 {
 720         int po_old = PicoOpt;
 721         int eo_old = currentConfig.EmuOpt;
 722
 723         PicoOpt &= ~0x10;
 724         PicoOpt |= opts|POPT_ACC_SPRITES;
 725         currentConfig.EmuOpt |= 0x80;
 726
 727         vidResetMode();
 728         memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*8/4); // borders
 729         memset32((int *)VRAM_CACHED_STUFF + 512*232/4, 0xe0e0e0e0, 512*8/4);
 730         memset32_uncached((int *)psp_screen + 512*264*2/4, 0, 512*8*2/4);
 731
 732         PicoDrawSetColorFormat(-1);
 733         PicoScanBegin = EmuScanSlowBegin;
 734         PicoScanEnd = EmuScanSlowEnd;
 735         EmuScanPrepare();
 736         PicoFrameDrawOnly();
 737         blit1();
 738         sceGuSync(0,0);
 739
 740         PicoOpt = po_old;
 741         currentConfig.EmuOpt = eo_old;
 742 }
 743
 744
 745 static void RunEventsPico(unsigned int events, unsigned int keys)
 746 {
 747         emu_RunEventsPico(events);
 748
 749         if (pico_inp_mode != 0)
 750         {
 751                 PicoPad[0] &= ~0x0f; // release UDLR
 752                 if (keys & PBTN_UP)   { pico_pen_y--; if (pico_pen_y < 8) pico_pen_y = 8; }
 753                 if (keys & PBTN_DOWN) { pico_pen_y++; if (pico_pen_y > 224-PICO_PEN_ADJUST_Y) pico_pen_y = 224-PICO_PEN_ADJUST_Y; }
 754                 if (keys & PBTN_LEFT) { pico_pen_x--; if (pico_pen_x < 0) pico_pen_x = 0; }
 755                 if (keys & PBTN_RIGHT) {
 756                         int lim = (Pico.video.reg[12]&1) ? 319 : 255;
 757                         pico_pen_x++;
 758                         if (pico_pen_x > lim-PICO_PEN_ADJUST_X)
 759                                 pico_pen_x = lim-PICO_PEN_ADJUST_X;
 760                 }
 761                 PicoPicohw.pen_pos[0] = pico_pen_x;
 762                 if (!(Pico.video.reg[12]&1)) PicoPicohw.pen_pos[0] += pico_pen_x/4;
 763                 PicoPicohw.pen_pos[0] += 0x3c;
 764                 PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);
 765         }
 766 }
 767
 768 static void RunEvents(unsigned int which)
 769 {
 770         if (which & 0x1800) // save or load (but not both)
 771         {
 772                 int do_it = 1;
 773
 774                 if ( emu_checkSaveFile(state_slot) &&
 775                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 776                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 777                 {
 778                         int keys;
 779                         sceGuSync(0,0);
 780                         blit2("", (which & 0x1000) ? "LOAD STATE? (X=yes, O=no)" : "OVERWRITE SAVE? (X=yes, O=no)", 0);
 781                         while( !((keys = psp_pad_read(1)) & (PBTN_X|PBTN_CIRCLE)) )
 782                                 psp_msleep(50);
 783                         if (keys & PBTN_CIRCLE) do_it = 0;
 784                         while(  ((keys = psp_pad_read(1)) & (PBTN_X|PBTN_CIRCLE)) ) // wait for release
 785                                 psp_msleep(50);
 786                         clearArea(0);
 787                 }
 788
 789                 if (do_it)
 790                 {
 791                         osd_text(4, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME", 1, 0);
 792                         PicoStateProgressCB = emu_msg_cb;
 793                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 794                         PicoStateProgressCB = NULL;
 795                         psp_msleep(0);
 796                 }
 797
 798                 reset_timing = 1;
 799         }
 800         if (which & 0x0400) // switch renderer
 801         {
 802                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 803                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 804
 805                 vidResetMode();
 806
 807                 if (PicoOpt&0x10)
 808                         strcpy(noticeMsg, "fast renderer");
 809                 else if (currentConfig.EmuOpt&0x80)
 810                         strcpy(noticeMsg, "accurate renderer");
 811
 812                 noticeMsgTime = sceKernelGetSystemTimeLow();
 813         }
 814         if (which & 0x0300)
 815         {
 816                 if(which&0x0200) {
 817                         state_slot -= 1;
 818                         if(state_slot < 0) state_slot = 9;
 819                 } else {
 820                         state_slot += 1;
 821                         if(state_slot > 9) state_slot = 0;
 822                 }
 823                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 824                 noticeMsgTime = sceKernelGetSystemTimeLow();
 825         }
 826 }
 827
 828 static void updateKeys(void)
 829 {
 830         unsigned int keys, allActions[2] = { 0, 0 }, events;
 831         static unsigned int prevEvents = 0;
 832         int i;
 833
 834         keys = psp_pad_read(0);
 835         if (keys & PSP_CTRL_HOME)
 836                 sceDisplayWaitVblankStart();
 837
 838         if (keys & PBTN_SELECT)
 839                 engineState = PGS_Menu;
 840
 841         keys &= CONFIGURABLE_KEYS;
 842
 843         for (i = 0; i < 32; i++)
 844         {
 845                 if (keys & (1 << i))
 846                 {
 847                         int pl, acts = currentConfig.KeyBinds[i];
 848                         if (!acts) continue;
 849                         pl = (acts >> 16) & 1;
 850                         if (kb_combo_keys & (1 << i))
 851                         {
 852                                 int u = i+1, acts_c = acts & kb_combo_acts;
 853                                 // let's try to find the other one
 854                                 if (acts_c) {
 855                                         for (; u < 32; u++)
 856                                                 if ( (keys & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {
 857                                                         allActions[pl] |= acts_c & currentConfig.KeyBinds[u];
 858                                                         keys &= ~((1 << i) | (1 << u));
 859                                                         break;
 860                                                 }
 861                                 }
 862                                 // add non-combo actions if combo ones were not found
 863                                 if (!acts_c || u == 32)
 864                                         allActions[pl] |= acts & ~kb_combo_acts;
 865                         } else {
 866                                 allActions[pl] |= acts;
 867                         }
 868                 }
 869         }
 870
 871         PicoPad[0] = allActions[0] & 0xfff;
 872         PicoPad[1] = allActions[1] & 0xfff;
 873
 874         if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);
 875         if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);
 876
 877         events = (allActions[0] | allActions[1]) >> 16;
 878
 879         if ((events ^ prevEvents) & 0x40) {
 880                 emu_changeFastForward(events & 0x40);
 881                 reset_timing = 1;
 882         }
 883
 884         events &= ~prevEvents;
 885
 886         if (PicoAHW == PAHW_PICO)
 887                 RunEventsPico(events, keys);
 888         if (events) RunEvents(events);
 889         if (movie_data) emu_updateMovie();
 890
 891         prevEvents = (allActions[0] | allActions[1]) >> 16;
 892 }
 893
 894
 895 static void simpleWait(unsigned int until)
 896 {
 897         unsigned int tval;
 898         int diff;
 899
 900         tval = sceKernelGetSystemTimeLow();
 901         diff = (int)until - (int)tval;
 902         if (diff >= 512 && diff < 100*1024)
 903                 sceKernelDelayThread(diff);
 904 }
 905
 906 void emu_Loop(void)
 907 {
 908         static int mp3_init_done = 0;
 909         char fpsbuff[24]; // fps count c string
 910         unsigned int tval, tval_thissec = 0; // timing
 911         int target_fps, target_frametime, lim_time, tval_diff, i, oldmodes = 0;
 912         int pframes_done, pframes_shown; // "period" frames, used for sync
 913         int  frames_done,  frames_shown, tval_fpsc = 0; // actual frames
 914         char *notice = NULL;
 915
 916         lprintf("entered emu_Loop()\n");
 917
 918         fpsbuff[0] = 0;
 919
 920         if (currentConfig.CPUclock != psp_get_cpu_clock()) {
 921                 lprintf("setting cpu clock to %iMHz... ", currentConfig.CPUclock);
 922                 i = psp_set_cpu_clock(currentConfig.CPUclock);
 923                 lprintf(i ? "failed\n" : "done\n");
 924                 currentConfig.CPUclock = psp_get_cpu_clock();
 925         }
 926
 927         // make sure we are in correct mode
 928         vidResetMode();
 929         clearArea(1);
 930         Pico.m.dirtyPal = 1;
 931         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 932         emu_findKeyBindCombos();
 933
 934         // pal/ntsc might have changed, reset related stuff
 935         target_fps = Pico.m.pal ? 50 : 60;
 936         target_frametime = Pico.m.pal ? (1000000<<8)/50 : (1000000<<8)/60+1;
 937         reset_timing = 1;
 938
 939         if (PicoAHW & PAHW_MCD) {
 940                 // prepare CD buffer
 941                 PicoCDBufferInit();
 942                 // mp3...
 943                 if (!mp3_init_done) {
 944                         i = mp3_init();
 945                         mp3_init_done = 1;
 946                         if (i) { engineState = PGS_Menu; return; }
 947                 }
 948         }
 949
 950         // prepare sound stuff
 951         PsndOut = NULL;
 952         if (currentConfig.EmuOpt & 4)
 953         {
 954                 emu_startSound();
 955         }
 956
 957         sceDisplayWaitVblankStart();
 958         pframes_shown = pframes_done =
 959          frames_shown =  frames_done = 0;
 960
 961         tval_fpsc = sceKernelGetSystemTimeLow();
 962
 963         // loop?
 964         while (engineState == PGS_Running)
 965         {
 966                 int modes;
 967
 968                 tval = sceKernelGetSystemTimeLow();
 969                 if (reset_timing || tval < tval_fpsc) {
 970                         //stdbg("timing reset");
 971                         reset_timing = 0;
 972                         tval_thissec = tval;
 973                         pframes_shown = pframes_done = 0;
 974                 }
 975
 976                 // show notice message?
 977                 if (noticeMsgTime) {
 978                         static int noticeMsgSum;
 979                         if (tval - noticeMsgTime > 2000000) { // > 2.0 sec
 980                                 noticeMsgTime = 0;
 981                                 clearArea(0);
 982                                 notice = 0;
 983                         } else {
 984                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 985                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 986                                 notice = noticeMsg;
 987                         }
 988                 }
 989
 990                 // check for mode changes
 991                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 992                 if (modes != oldmodes) {
 993                         oldmodes = modes;
 994                         clearArea(1);
 995                         set_scaling_params();
 996                 }
 997
 998                 // second passed?
 999                 if (tval - tval_fpsc >= 1000000)
1000                 {
1001                         if (currentConfig.EmuOpt & 2)
1002                                 sprintf(fpsbuff, "%02i/%02i  ", frames_shown, frames_done);
1003                         frames_done = frames_shown = 0;
1004                         tval_fpsc += 1000000;
1005                 }
1006
1007                 if (tval - tval_thissec >= 1000000)
1008                 {
1009                         // missing 1 frame?
1010                         if (currentConfig.Frameskip < 0 && pframes_done < target_fps) {
1011                                 SkipFrame(); pframes_done++; frames_done++;
1012                         }
1013
1014                         tval_thissec += 1000000;
1015
1016                         if (currentConfig.Frameskip < 0) {
1017                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;
1018                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;
1019                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;
1020                         } else {
1021                                 pframes_done = pframes_shown = 0;
1022                         }
1023                 }
1024 #ifdef PFRAMES
1025                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
1026 #endif
1027
1028                 lim_time = (pframes_done+1) * target_frametime;
1029                 if (currentConfig.Frameskip >= 0) // frameskip enabled
1030                 {
1031                         for (i = 0; i < currentConfig.Frameskip; i++) {
1032                                 updateKeys();
1033                                 SkipFrame(); pframes_done++; frames_done++;
1034                                 if (!(currentConfig.EmuOpt&0x40000)) { // do framelimitting if needed
1035                                         int tval_diff;
1036                                         tval = sceKernelGetSystemTimeLow();
1037                                         tval_diff = (int)(tval - tval_thissec) << 8;
1038                                         if (tval_diff < lim_time) // we are too fast
1039                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
1040                                 }
1041                                 lim_time += target_frametime;
1042                         }
1043                 }
1044                 else // auto frameskip
1045                 {
1046                         int tval_diff;
1047                         tval = sceKernelGetSystemTimeLow();
1048                         tval_diff = (int)(tval - tval_thissec) << 8;
1049                         if (tval_diff > lim_time && (pframes_done/16 < pframes_shown))
1050                         {
1051                                 // no time left for this frame - skip
1052                                 if (tval_diff - lim_time >= (300000<<8)) {
1053                                         reset_timing = 1;
1054                                         continue;
1055                                 }
1056                                 updateKeys();
1057                                 SkipFrame(); pframes_done++; frames_done++;
1058                                 continue;
1059                         }
1060                 }
1061
1062                 updateKeys();
1063
1064                 if (!(PicoOpt&0x10))
1065                         EmuScanPrepare();
1066
1067                 PicoFrame();
1068
1069                 sceGuSync(0,0);
1070
1071                 // check time
1072                 tval = sceKernelGetSystemTimeLow();
1073                 tval_diff = (int)(tval - tval_thissec) << 8;
1074
1075                 blit2(fpsbuff, notice, tval_diff > lim_time);
1076
1077                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300000<<8)) { // slowdown detection
1078                         reset_timing = 1;
1079                 }
1080                 else if (!(currentConfig.EmuOpt&0x40000) || currentConfig.Frameskip < 0)
1081                 {
1082                         // sleep if we are still too fast
1083                         if (tval_diff < lim_time)
1084                         {
1085                                 // we are too fast
1086                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
1087                         }
1088                 }
1089
1090                 pframes_done++; pframes_shown++;
1091                  frames_done++;  frames_shown++;
1092         }
1093
1094
1095         emu_changeFastForward(0);
1096
1097         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();
1098
1099         if (PsndOut != NULL) {
1100                 emu_endSound();
1101                 PsndOut = NULL;
1102         }
1103
1104         // save SRAM
1105         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
1106                 emu_msg_cb("Writing SRAM/BRAM..");
1107                 emu_SaveLoadGame(0, 1);
1108                 SRam.changed = 0;
1109         }
1110
1111         // clear fps counters and stuff
1112         memset32_uncached((int *)psp_video_get_active_fb() + 512*264*2/4, 0, 512*8*2/4);
1113 }
1114
1115
1116 void emu_ResetGame(void)
1117 {
1118         PicoReset();
1119         reset_timing = 1;
1120 }
1121
1122 void emu_HandleResume(void)
1123 {
1124         if (!(PicoAHW & PAHW_MCD)) return;
1125
1126         // reopen first CD track
1127         if (Pico_mcd->TOC.Tracks[0].F != NULL)
1128         {
1129                 char *fname = rom_fname_reload;
1130                 int len = strlen(rom_fname_reload);
1131                 cue_data_t *cue_data = NULL;
1132
1133                 if (len > 4 && strcasecmp(fname + len - 4,  ".cue") == 0)
1134                 {
1135                         cue_data = cue_parse(rom_fname_reload);
1136                         if (cue_data != NULL)
1137                                 fname = cue_data->tracks[1].fname;
1138                 }
1139
1140                 lprintf("emu_HandleResume: reopen %s\n", fname);
1141                 pm_close(Pico_mcd->TOC.Tracks[0].F);
1142                 Pico_mcd->TOC.Tracks[0].F = pm_open(fname);
1143                 lprintf("reopen %s\n", Pico_mcd->TOC.Tracks[0].F != NULL ? "ok" : "failed");
1144
1145                 if (cue_data != NULL) cue_destroy(cue_data);
1146         }
1147
1148         mp3_reopen_file();
1149
1150         if (!(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))
1151                 cdda_start_play();
1152 }
1153