platform/psp/emu.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3 #include <sys/syslimits.h> // PATH_MAX
   4
   5 #include <pspthreadman.h>
   6 #include <pspdisplay.h>
   7 #include <psputils.h>
   8 #include <pspgu.h>
   9 #include <pspaudio.h>
  10
  11 #include "psp.h"
  12 #include "menu.h"
  13 #include "emu.h"
  14 #include "../common/emu.h"
  15 #include "../common/lprintf.h"
  16 #include "../../Pico/PicoInt.h"
  17
  18 #define OSD_FPS_X 420
  19
  20 // additional pspaudio imports, credits to crazyc
  21 int sceAudio_38553111(unsigned short samples, unsigned short freq, char unknown);  // play with conversion?
  22 int sceAudio_5C37C0AE(void);                            // end play?
  23 int sceAudio_E0727056(int volume, void *buffer);        // blocking output
  24 int sceAudioOutput2GetRestSample();
  25
  26
  27 char romFileName[PATH_MAX];
  28 unsigned char *PicoDraw2FB = (unsigned char *)VRAM_CACHED_STUFF + 8; // +8 to be able to skip border with 1 quadword..
  29 int engineState;
  30
  31 static int combo_keys = 0, combo_acts = 0; // keys and actions which need button combos
  32 static unsigned int noticeMsgTime = 0;
  33 int reset_timing = 0; // do we need this?
  34
  35
  36 static void sound_init(void);
  37 static void sound_deinit(void);
  38 static void blit2(const char *fps, const char *notice);
  39 static void clearArea(int full);
  40
  41 void emu_noticeMsgUpdated(void)
  42 {
  43         noticeMsgTime = sceKernelGetSystemTimeLow();
  44 }
  45
  46 void emu_getMainDir(char *dst, int len)
  47 {
  48         if (len > 0) *dst = 0;
  49 }
  50
  51 static void osd_text(int x, const char *text, int is_active)
  52 {
  53         unsigned short *screen = is_active ? psp_video_get_active_fb() : psp_screen;
  54         int len = strlen(text) * 8 / 2;
  55         int *p, h;
  56         void *tmp;
  57         for (h = 0; h < 8; h++) {
  58                 p = (int *) (screen+x+512*(264+h));
  59                 p = (int *) ((int)p & ~3); // align
  60                 memset32(p, 0, len);
  61         }
  62         if (is_active) { tmp = psp_screen; psp_screen = screen; } // nasty pointer tricks
  63         emu_textOut16(x, 264, text);
  64         if (is_active) psp_screen = tmp;
  65 }
  66
  67 void emu_msg_cb(const char *msg)
  68 {
  69         osd_text(4, msg, 1);
  70         noticeMsgTime = sceKernelGetSystemTimeLow() - 2000000;
  71
  72         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  73         reset_timing = 1;
  74 }
  75
  76 static void emu_msg_tray_open(void)
  77 {
  78         strcpy(noticeMsg, "CD tray opened");
  79         noticeMsgTime = sceKernelGetSystemTimeLow();
  80 }
  81
  82
  83 void emu_Init(void)
  84 {
  85         // make dirs for saves, cfgs, etc.
  86         mkdir("mds", 0777);
  87         mkdir("srm", 0777);
  88         mkdir("brm", 0777);
  89         mkdir("cfg", 0777);
  90
  91         sound_init();
  92
  93         PicoInit();
  94         PicoMessage = emu_msg_cb;
  95         PicoMCDopenTray = emu_msg_tray_open;
  96         PicoMCDcloseTray = menu_loop_tray;
  97 }
  98
  99 void emu_Deinit(void)
 100 {
 101         // save SRAM
 102         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 103                 emu_SaveLoadGame(0, 1);
 104                 SRam.changed = 0;
 105         }
 106
 107         if (!(currentConfig.EmuOpt & 0x20)) {
 108                 FILE *f = fopen(PicoConfigFile, "r+b");
 109                 if (!f) emu_WriteConfig(0);
 110                 else {
 111                         // if we already have config, reload it, except last ROM
 112                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 113                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 114                         fseek(f, 0, SEEK_SET);
 115                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 116                         fflush(f);
 117                         fclose(f);
 118                 }
 119         }
 120
 121         PicoExit();
 122         sound_deinit();
 123 }
 124
 125 void emu_setDefaultConfig(void)
 126 {
 127         memset(&currentConfig, 0, sizeof(currentConfig));
 128         currentConfig.lastRomFile[0] = 0;
 129         currentConfig.EmuOpt  = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
 130         currentConfig.PicoOpt = 0x0f | 0xc00; // | cd_pcm, cd_cdda
 131         currentConfig.PsndRate = 22050;
 132         currentConfig.PicoRegion = 0; // auto
 133         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 134         currentConfig.Frameskip = -1; // auto
 135         currentConfig.volume = 50;
 136         currentConfig.CPUclock = 222;
 137         currentConfig.KeyBinds[ 4] = 1<<0; // SACB RLDU
 138         currentConfig.KeyBinds[ 6] = 1<<1;
 139         currentConfig.KeyBinds[ 7] = 1<<2;
 140         currentConfig.KeyBinds[ 5] = 1<<3;
 141         currentConfig.KeyBinds[14] = 1<<4;
 142         currentConfig.KeyBinds[13] = 1<<5;
 143         currentConfig.KeyBinds[15] = 1<<6;
 144         currentConfig.KeyBinds[ 3] = 1<<7;
 145         currentConfig.KeyBinds[12] = 1<<26; // switch rnd
 146         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 147         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 148         currentConfig.PicoCDBuffers = 0;
 149         currentConfig.scaling = 1; // bilinear filtering for psp
 150         currentConfig.scale = currentConfig.hscale32 = currentConfig.hscale40 = 1.0;
 151 }
 152
 153
 154 extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
 155
 156 struct Vertex
 157 {
 158         short u,v;
 159         short x,y,z;
 160 };
 161
 162 static struct Vertex __attribute__((aligned(4))) g_vertices[2];
 163 static unsigned short __attribute__((aligned(16))) localPal[0x100];
 164 static int dynamic_palette = 0, need_pal_upload = 0, blit_16bit_mode = 0;
 165 static int fbimg_offs = 0;
 166
 167 static void set_scaling_params(void)
 168 {
 169         int src_width, fbimg_width, fbimg_height, fbimg_xoffs, fbimg_yoffs;
 170         g_vertices[0].x = g_vertices[0].y =
 171         g_vertices[0].z = g_vertices[1].z = 0;
 172
 173         fbimg_height = (int)(240.0 * currentConfig.scale + 0.5);
 174         if (Pico.video.reg[12] & 1) {
 175                 fbimg_width = (int)(320.0 * currentConfig.scale * currentConfig.hscale40 + 0.5);
 176                 src_width = 320;
 177         } else {
 178                 fbimg_width = (int)(256.0 * currentConfig.scale * currentConfig.hscale32 + 0.5);
 179                 src_width = 256;
 180         }
 181
 182         if (fbimg_width >= 480) {
 183                 g_vertices[0].u = (fbimg_width-480)/2;
 184                 g_vertices[1].u = src_width - (fbimg_width-480)/2;
 185                 fbimg_width = 480;
 186                 fbimg_xoffs = 0;
 187         } else {
 188                 g_vertices[0].u = 0;
 189                 g_vertices[1].u = src_width;
 190                 fbimg_xoffs = 240 - fbimg_width/2;
 191         }
 192
 193         if (fbimg_height >= 272) {
 194                 g_vertices[0].v = (fbimg_height-272)/2;
 195                 g_vertices[1].v = 240 - (fbimg_height-272)/2;
 196                 fbimg_height = 272;
 197                 fbimg_yoffs = 0;
 198         } else {
 199                 g_vertices[0].v = 0;
 200                 g_vertices[1].v = 240;
 201                 fbimg_yoffs = 136 - fbimg_height/2;
 202         }
 203
 204         g_vertices[1].x = fbimg_width;
 205         g_vertices[1].y = fbimg_height;
 206         if (fbimg_xoffs < 0) fbimg_xoffs = 0;
 207         if (fbimg_yoffs < 0) fbimg_yoffs = 0;
 208         fbimg_offs = (fbimg_yoffs*512 + fbimg_xoffs) * 2; // dst is always 16bit
 209
 210         /*
 211         lprintf("set_scaling_params:\n");
 212         lprintf("offs: %i, %i\n", fbimg_xoffs, fbimg_yoffs);
 213         lprintf("xy0, xy1: %i, %i; %i, %i\n", g_vertices[0].x, g_vertices[0].y, g_vertices[1].x, g_vertices[1].y);
 214         lprintf("uv0, uv1: %i, %i; %i, %i\n", g_vertices[0].u, g_vertices[0].v, g_vertices[1].u, g_vertices[1].v);
 215         */
 216 }
 217
 218 static void do_pal_update(int allow_sh)
 219 {
 220         unsigned int *spal=(void *)Pico.cram;
 221         unsigned int *dpal=(void *)localPal;
 222         int i;
 223
 224         for (i = 0x3f/2; i >= 0; i--)
 225                 dpal[i] = ((spal[i]&0x000f000f)<< 1)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)<<4);
 226
 227         if (allow_sh && (Pico.video.reg[0xC]&8)) // shadow/hilight?
 228         {
 229                 // shadowed pixels
 230                 for (i = 0x3f/2; i >= 0; i--)
 231                         dpal[0x20|i] = dpal[0x60|i] = (dpal[i]>>1)&0x738e738e;
 232                 // hilighted pixels
 233                 for (i = 0x3f; i >= 0; i--) {
 234                         int t=localPal[i]&0xe71c;t+=0x4208;
 235                         if (t&0x20) t|=0x1c;
 236                         if (t&0x800) t|=0x700;
 237                         if (t&0x10000) t|=0xe000;
 238                         t&=0xe71c;
 239                         localPal[0x80|i]=(unsigned short)t;
 240                 }
 241                 localPal[0xe0] = 0;
 242         }
 243         Pico.m.dirtyPal = 0;
 244         need_pal_upload = 1;
 245 }
 246
 247 static void do_slowmode_lines(int line_to)
 248 {
 249         int line = 0, line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 250         unsigned short *dst = (unsigned short *)VRAM_STUFF + 512*240/2;
 251         unsigned char  *src = (unsigned char  *)VRAM_CACHED_STUFF + 16;
 252         if (!(Pico.video.reg[1]&8)) { line = 8; dst += 512*8; src += 512*8; }
 253
 254         for (; line < line_to; line++, dst+=512, src+=512)
 255                 amips_clut(dst, src, localPal, line_len);
 256 }
 257
 258 static void EmuScanPrepare(void)
 259 {
 260         HighCol = (unsigned char *)VRAM_CACHED_STUFF + 8;
 261         if (!(Pico.video.reg[1]&8)) HighCol += 8*512;
 262
 263         dynamic_palette = 0;
 264         if (Pico.m.dirtyPal)
 265                 do_pal_update(1);
 266 }
 267
 268 static int EmuScanSlow(unsigned int num, void *sdata)
 269 {
 270         if (!(Pico.video.reg[1]&8)) num += 8;
 271
 272         if (Pico.m.dirtyPal) {
 273                 if (!dynamic_palette) {
 274                         do_slowmode_lines(num);
 275                         dynamic_palette = 1;
 276                 }
 277                 do_pal_update(1);
 278         }
 279
 280         if (dynamic_palette) {
 281                 int line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 282                 void *dst = (char *)VRAM_STUFF + 512*240 + 512*2*num;
 283                 amips_clut(dst, HighCol + 8, localPal, line_len);
 284         } else
 285                 HighCol = (unsigned char *)VRAM_CACHED_STUFF + (num+1)*512 + 8;
 286
 287         return 0;
 288 }
 289
 290 static void blitscreen_clut(void)
 291 {
 292         int offs = fbimg_offs;
 293         offs += (psp_screen == VRAM_FB0) ? VRAMOFFS_FB0 : VRAMOFFS_FB1;
 294
 295         sceGuSync(0,0); // sync with prev
 296         sceGuStart(GU_DIRECT, guCmdList);
 297         sceGuDrawBuffer(GU_PSM_5650, (void *)offs, 512); // point to back buffer
 298
 299         if (dynamic_palette)
 300         {
 301                 if (!blit_16bit_mode) {
 302                         sceGuTexMode(GU_PSM_5650, 0, 0, 0);
 303                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 512*240);
 304
 305                         blit_16bit_mode = 1;
 306                 }
 307         }
 308         else
 309         {
 310                 if (blit_16bit_mode) {
 311                         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 312                         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 313                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 314                         blit_16bit_mode = 0;
 315                 }
 316
 317                 if ((PicoOpt&0x10) && Pico.m.dirtyPal)
 318                         do_pal_update(0);
 319
 320                 sceKernelDcacheWritebackAll();
 321
 322                 if (need_pal_upload) {
 323                         need_pal_upload = 0;
 324                         sceGuClutLoad((256/8), localPal); // upload 32*8 entries (256)
 325                 }
 326         }
 327
 328 #if 1
 329         if (g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x)
 330         {
 331                 struct Vertex* vertices;
 332                 int x;
 333
 334                 #define SLICE_WIDTH 32
 335                 for (x = 0; x < g_vertices[1].x; x += SLICE_WIDTH)
 336                 {
 337                         // render sprite
 338                         vertices = (struct Vertex*)sceGuGetMemory(2 * sizeof(struct Vertex));
 339                         memcpy(vertices, g_vertices, 2 * sizeof(struct Vertex));
 340                         vertices[0].u = vertices[0].x = x;
 341                         vertices[1].u = vertices[1].x = x + SLICE_WIDTH;
 342                         sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,vertices);
 343                 }
 344                 // lprintf("listlen: %iB\n", sceGuCheckList()); // ~480 only
 345         }
 346         else
 347 #endif
 348                 sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,g_vertices);
 349
 350         sceGuFinish();
 351 }
 352
 353
 354 static void cd_leds(void)
 355 {
 356         static int old_reg = 0;
 357         unsigned int col_g, col_r, *p;
 358
 359         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 360         old_reg = Pico_mcd->s68k_regs[0];
 361
 362         p = (unsigned int *)((short *)psp_screen + 512*2+4+2);
 363         col_g = (old_reg & 2) ? 0x06000600 : 0;
 364         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 365         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 366         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 367         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 368 }
 369
 370
 371 static void dbg_text(void)
 372 {
 373         int *p, h, len;
 374         char text[128];
 375
 376         sprintf(text, "sl: %i, 16b: %i", g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x, blit_16bit_mode);
 377         len = strlen(text) * 8 / 2;
 378         for (h = 0; h < 8; h++) {
 379                 p = (int *) ((unsigned short *) psp_screen+2+512*(256+h));
 380                 p = (int *) ((int)p & ~3); // align
 381                 memset32(p, 0, len);
 382         }
 383         emu_textOut16(2, 256, text);
 384 }
 385
 386
 387 /* called after rendering is done, but frame emulation is not finished */
 388 void blit1(void)
 389 {
 390         if (PicoOpt&0x10)
 391         {
 392                 int i;
 393                 unsigned char *pd;
 394                 // clear top and bottom trash
 395                 for (pd = PicoDraw2FB+8, i = 8; i > 0; i--, pd += 512)
 396                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 397                 for (pd = PicoDraw2FB+512*232+8, i = 8; i > 0; i--, pd += 512)
 398                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 399         }
 400
 401         blitscreen_clut();
 402 }
 403
 404
 405 static void blit2(const char *fps, const char *notice)
 406 {
 407         int emu_opt = currentConfig.EmuOpt;
 408
 409         sceGuSync(0,0);
 410
 411         if (notice || (emu_opt & 2)) {
 412                 if (notice)      osd_text(4, notice, 0);
 413                 if (emu_opt & 2) osd_text(OSD_FPS_X, fps, 0);
 414         }
 415
 416         dbg_text();
 417
 418         if ((emu_opt & 0x400) && (PicoMCD & 1))
 419                 cd_leds();
 420
 421         psp_video_flip(0);
 422 }
 423
 424 // clears whole screen or just the notice area (in all buffers)
 425 static void clearArea(int full)
 426 {
 427         if (full) {
 428                 memset32(psp_screen, 0, 512*272*2/4);
 429                 psp_video_flip(0);
 430                 memset32(psp_screen, 0, 512*272*2/4);
 431                 memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*240/4);
 432                 memset32((int *)VRAM_CACHED_STUFF+512*240/4, 0, 512*240*2/4);
 433         } else {
 434                 void *fb = psp_video_get_active_fb();
 435                 memset32((int *)((char *)psp_screen + 512*264*2), 0, 512*8*2/4);
 436                 memset32((int *)((char *)fb         + 512*264*2), 0, 512*8*2/4);
 437         }
 438 }
 439
 440 static void vidResetMode(void)
 441 {
 442         // setup GU
 443         sceGuSync(0,0); // sync with prev
 444         sceGuStart(GU_DIRECT, guCmdList);
 445
 446         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 447         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 448         sceGuTexFunc(GU_TFX_REPLACE,GU_TCC_RGB);
 449         if (currentConfig.scaling)
 450              sceGuTexFilter(GU_LINEAR, GU_LINEAR);
 451         else sceGuTexFilter(GU_NEAREST, GU_NEAREST);
 452         sceGuTexScale(1.0f,1.0f);
 453         sceGuTexOffset(0.0f,0.0f);
 454
 455         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 456
 457         // slow rend.
 458         PicoDrawSetColorFormat(-1);
 459         PicoScan = EmuScanSlow;
 460
 461         localPal[0xe0] = 0;
 462         Pico.m.dirtyPal = 1;
 463         blit_16bit_mode = dynamic_palette = 0;
 464
 465         sceGuFinish();
 466         set_scaling_params();
 467         sceGuSync(0,0);
 468 }
 469
 470
 471 /* sound stuff */
 472 #define SOUND_BLOCK_SIZE_NTSC (2940*2) // 1024 // 1152
 473 #define SOUND_BLOCK_SIZE_PAL  (3528*2)
 474 #define SOUND_BLOCK_COUNT    4
 475
 476 static short __attribute__((aligned(4))) sndBuffer[SOUND_BLOCK_SIZE_PAL*SOUND_BLOCK_COUNT + 44100/50*2];
 477 static short *snd_playptr = NULL, *sndBuffer_endptr = NULL;
 478 static int samples_made = 0, samples_done = 0, samples_block = 0;
 479 static int sound_thread_exit = 0;
 480 static SceUID sound_sem = -1;
 481
 482 static void writeSound(int len);
 483
 484 static int sound_thread(SceSize args, void *argp)
 485 {
 486         int ret;
 487
 488         lprintf("sound_thread: started, priority %i\n", sceKernelGetThreadCurrentPriority());
 489
 490         while (!sound_thread_exit)
 491         {
 492                 if (samples_made - samples_done < samples_block) {
 493                         // wait for data...
 494                         //lprintf("sthr: wait... (%i/%i)\n", samples_done, samples_made);
 495                         ret = sceKernelWaitSema(sound_sem, 1, 0);
 496                         //lprintf("sthr: sceKernelWaitSema: %i\n", ret);
 497                         continue;
 498                 }
 499
 500                 //lprintf("sthr: got data: %i\n", samples_made - samples_done);
 501
 502                 ret = sceAudio_E0727056(PSP_AUDIO_VOLUME_MAX, snd_playptr);
 503
 504                 samples_done += samples_block;
 505                 snd_playptr  += samples_block;
 506                 if (snd_playptr >= sndBuffer_endptr)
 507                         snd_playptr = sndBuffer;
 508                 if (ret)
 509                         lprintf("sthr: outf: %i; pos %i/%i\n", ret, samples_done, samples_made);
 510         }
 511
 512         lprintf("sthr: exit\n");
 513         sceKernelExitDeleteThread(0);
 514         return 0;
 515 }
 516
 517 static void sound_init(void)
 518 {
 519         SceUID thid;
 520
 521         sound_sem = sceKernelCreateSema("sndsem", 0, 0, 1, NULL);
 522         if (sound_sem < 0) lprintf("sceKernelCreateSema() failed: %i\n", sound_sem);
 523
 524         sound_thread_exit = 0;
 525         thid = sceKernelCreateThread("sndthread", sound_thread, 0x12, 0x10000, 0, NULL);
 526         if (thid >= 0)
 527         {
 528                 sceKernelStartThread(thid, 0, 0);
 529         }
 530         else
 531                 lprintf("sceKernelCreateThread failed: %i\n", thid);
 532 }
 533
 534 static void sound_prepare(void)
 535 {
 536         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 537         int ret, stereo;
 538
 539         samples_made = samples_done = 0;
 540
 541         if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 542                 PsndRerate(Pico.m.frame_count ? 1 : 0);
 543         }
 544         stereo=(PicoOpt&8)>>3;
 545
 546         samples_block = Pico.m.pal ? SOUND_BLOCK_SIZE_PAL : SOUND_BLOCK_SIZE_NTSC;
 547         if (PsndRate == 22050) samples_block /= 2;
 548         else if (PsndRate == 11025) samples_block /= 4;
 549         sndBuffer_endptr = &sndBuffer[samples_block*SOUND_BLOCK_COUNT];
 550
 551         lprintf("starting audio: %i, len: %i, stereo: %i, pal: %i, block samples: %i\n",
 552                         PsndRate, PsndLen, stereo, Pico.m.pal, samples_block);
 553
 554         while (sceAudioOutput2GetRestSample() > 0) psp_msleep(100);
 555         sceAudio_5C37C0AE();
 556         ret = sceAudio_38553111(samples_block/2, PsndRate, 2); // seems to not need that stupid 64byte alignment
 557         if (ret < 0) {
 558                 lprintf("sceAudio_38553111() failed: %i\n", ret);
 559                 sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 560                 noticeMsgTime = sceKernelGetSystemTimeLow();
 561                 currentConfig.EmuOpt &= ~4;
 562         } else {
 563                 PicoWriteSound = writeSound;
 564                 memset32((int *)(void *)sndBuffer, 0, sizeof(sndBuffer)/4);
 565                 snd_playptr = sndBuffer_endptr - samples_block;
 566                 samples_made = samples_block; // send 1 empty block first..
 567                 PsndOut = sndBuffer;
 568                 PsndRate_old = PsndRate;
 569                 PicoOpt_old  = PicoOpt;
 570                 pal_old = Pico.m.pal;
 571         }
 572 }
 573
 574 static void sound_end(void)
 575 {
 576         samples_made = samples_done = 0;
 577         while (sceAudioOutput2GetRestSample() > 0)
 578                 psp_msleep(100);
 579         sceAudio_5C37C0AE();
 580 }
 581
 582 static void sound_deinit(void)
 583 {
 584         sound_thread_exit = 1;
 585         sceKernelSignalSema(sound_sem, 1);
 586         sceKernelDeleteSema(sound_sem);
 587         sound_sem = -1;
 588 }
 589
 590 static void writeSound(int len)
 591 {
 592         int ret;
 593         if (PicoOpt&8) len<<=1;
 594
 595         PsndOut += len;
 596         /*if (PsndOut > sndBuffer_endptr) {
 597                 memcpy32((int *)(void *)sndBuffer, (int *)endptr, (PsndOut - endptr + 1) / 2);
 598                 PsndOut = &sndBuffer[PsndOut - endptr];
 599                 lprintf("mov\n");
 600         }
 601         else*/
 602         if (PsndOut >= sndBuffer_endptr)
 603                 PsndOut = sndBuffer;
 604
 605         // signal the snd thread
 606         samples_made += len;
 607         if (samples_made - samples_done >= samples_block) {
 608                 // lprintf("signal, %i/%i\n", samples_done, samples_made);
 609                 ret = sceKernelSignalSema(sound_sem, 1);
 610                 // lprintf("signal ret %i\n", ret);
 611         }
 612 }
 613
 614
 615 static void SkipFrame(void)
 616 {
 617         PicoSkipFrame=1;
 618         PicoFrame();
 619         PicoSkipFrame=0;
 620 }
 621
 622 void emu_forcedFrame(void)
 623 {
 624         int po_old = PicoOpt;
 625         int eo_old = currentConfig.EmuOpt;
 626
 627         PicoOpt &= ~0x0010;
 628         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 629         currentConfig.EmuOpt |= 0x80;
 630
 631         vidResetMode();
 632         memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*8/4); // borders
 633         memset32((int *)VRAM_CACHED_STUFF + 512*232/4, 0xe0e0e0e0, 512*8/4);
 634         memset32((int *)psp_screen + 512*264*2/4, 0, 512*8*2/4);
 635
 636         PicoDrawSetColorFormat(-1);
 637         PicoScan = EmuScanSlow;
 638         EmuScanPrepare();
 639         PicoFrameDrawOnly();
 640         blit1();
 641         sceGuSync(0,0);
 642
 643         PicoOpt = po_old;
 644         currentConfig.EmuOpt = eo_old;
 645 }
 646
 647
 648 static void RunEvents(unsigned int which)
 649 {
 650         if (which & 0x1800) // save or load (but not both)
 651         {
 652                 int do_it = 1;
 653
 654                 if ( emu_checkSaveFile(state_slot) &&
 655                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 656                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 657                 {
 658                         int keys;
 659                         blit2("", (which & 0x1000) ? "LOAD STATE? (X=yes, O=no)" : "OVERWRITE SAVE? (X=yes, O=no)");
 660                         while( !((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) )
 661                                 psp_msleep(50);
 662                         if (keys & BTN_CIRCLE) do_it = 0;
 663                         while(  ((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) ) // wait for release
 664                                 psp_msleep(50);
 665                         clearArea(0);
 666                 }
 667
 668                 if (do_it)
 669                 {
 670                         osd_text(4, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME", 1);
 671                         PicoStateProgressCB = emu_msg_cb;
 672                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 673                         PicoStateProgressCB = NULL;
 674                         psp_msleep(0);
 675                 }
 676
 677                 reset_timing = 1;
 678         }
 679         if (which & 0x0400) // switch renderer
 680         {
 681                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 682                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 683
 684                 vidResetMode();
 685
 686                 if (PicoOpt&0x10) {
 687                         strcpy(noticeMsg, " 8bit fast renderer");
 688                 } else if (currentConfig.EmuOpt&0x80) {
 689                         strcpy(noticeMsg, "16bit accurate renderer");
 690                 } else {
 691                         strcpy(noticeMsg, " 8bit accurate renderer");
 692                 }
 693
 694                 noticeMsgTime = sceKernelGetSystemTimeLow();
 695         }
 696         if (which & 0x0300)
 697         {
 698                 if(which&0x0200) {
 699                         state_slot -= 1;
 700                         if(state_slot < 0) state_slot = 9;
 701                 } else {
 702                         state_slot += 1;
 703                         if(state_slot > 9) state_slot = 0;
 704                 }
 705                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 706                 noticeMsgTime = sceKernelGetSystemTimeLow();
 707         }
 708 }
 709
 710 static void updateKeys(void)
 711 {
 712         unsigned int keys, allActions[2] = { 0, 0 }, events;
 713         static unsigned int prevEvents = 0;
 714         int i;
 715
 716         keys = psp_pad_read(0);
 717         if (keys & PSP_CTRL_HOME)
 718                 sceDisplayWaitVblankStart();
 719
 720         if (keys & BTN_SELECT)
 721                 engineState = PGS_Menu;
 722
 723         keys &= CONFIGURABLE_KEYS;
 724
 725         for (i = 0; i < 32; i++)
 726         {
 727                 if (keys & (1 << i))
 728                 {
 729                         int pl, acts = currentConfig.KeyBinds[i];
 730                         if (!acts) continue;
 731                         pl = (acts >> 16) & 1;
 732                         if (combo_keys & (1 << i))
 733                         {
 734                                 int u = i+1, acts_c = acts & combo_acts;
 735                                 // let's try to find the other one
 736                                 if (acts_c)
 737                                         for (; u < 32; u++)
 738                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 739                                                         allActions[pl] |= acts_c;
 740                                                         keys &= ~((1 << i) | (1 << u));
 741                                                         break;
 742                                                 }
 743                                 // add non-combo actions if combo ones were not found
 744                                 if (!acts_c || u == 32)
 745                                         allActions[pl] |= acts & ~combo_acts;
 746                         } else {
 747                                 allActions[pl] |= acts;
 748                         }
 749                 }
 750         }
 751
 752         PicoPad[0] = (unsigned short) allActions[0];
 753         PicoPad[1] = (unsigned short) allActions[1];
 754
 755         events = (allActions[0] | allActions[1]) >> 16;
 756
 757         // volume is treated in special way and triggered every frame
 758         if ((events & 0x6000) && PsndOut != NULL)
 759         {
 760                 int vol = currentConfig.volume;
 761                 if (events & 0x2000) {
 762                         if (vol < 100) vol++;
 763                 } else {
 764                         if (vol >   0) vol--;
 765                 }
 766                 // FrameworkAudio_SetVolume(vol, vol); // TODO
 767                 sprintf(noticeMsg, "VOL: %02i ", vol);
 768                 noticeMsgTime = sceKernelGetSystemTimeLow();
 769                 currentConfig.volume = vol;
 770         }
 771
 772         events &= ~prevEvents;
 773         if (events) RunEvents(events);
 774         if (movie_data) emu_updateMovie();
 775
 776         prevEvents = (allActions[0] | allActions[1]) >> 16;
 777 }
 778
 779 static void find_combos(void)
 780 {
 781         int act, u;
 782
 783         // find out which keys and actions are combos
 784         combo_keys = combo_acts = 0;
 785         for (act = 0; act < 32; act++)
 786         {
 787                 int keyc = 0;
 788                 if (act == 16 || act == 17) continue; // player2 flag
 789                 for (u = 0; u < 32; u++)
 790                 {
 791                         if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
 792                 }
 793                 if (keyc > 1)
 794                 {
 795                         // loop again and mark those keys and actions as combo
 796                         for (u = 0; u < 32; u++)
 797                         {
 798                                 if (currentConfig.KeyBinds[u] & (1 << act)) {
 799                                         combo_keys |= 1 << u;
 800                                         combo_acts |= 1 << act;
 801                                 }
 802                         }
 803                 }
 804         }
 805 }
 806
 807
 808 static void simpleWait(unsigned int until)
 809 {
 810         unsigned int tval;
 811         int diff;
 812
 813         tval = sceKernelGetSystemTimeLow();
 814         diff = (int)until - (int)tval;
 815         if (diff >= 512 && diff < 100*1024)
 816                 sceKernelDelayThread(diff);
 817 }
 818
 819 void emu_Loop(void)
 820 {
 821         char fpsbuff[24]; // fps count c string
 822         unsigned int tval, tval_prev = 0, tval_thissec = 0; // timing
 823         int frames_done = 0, frames_shown = 0, oldmodes = 0;
 824         int target_fps, target_frametime, lim_time, tval_diff, i;
 825         char *notice = NULL;
 826
 827         lprintf("entered emu_Loop()\n");
 828
 829         fpsbuff[0] = 0;
 830
 831         if (currentConfig.CPUclock != psp_get_cpu_clock()) {
 832                 lprintf("setting cpu clock to %iMHz... ", currentConfig.CPUclock);
 833                 i = psp_set_cpu_clock(currentConfig.CPUclock);
 834                 lprintf(i ? "failed\n" : "done\n");
 835                 currentConfig.CPUclock = psp_get_cpu_clock();
 836         }
 837
 838         // make sure we are in correct mode
 839         vidResetMode();
 840         clearArea(1);
 841         Pico.m.dirtyPal = 1;
 842         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 843         find_combos();
 844
 845         // pal/ntsc might have changed, reset related stuff
 846         target_fps = Pico.m.pal ? 50 : 60;
 847         target_frametime = Pico.m.pal ? (1000000<<8)/50 : (1000000<<8)/60+1;
 848         reset_timing = 1;
 849
 850         // prepare CD buffer
 851         if (PicoMCD & 1) PicoCDBufferInit();
 852
 853         // prepare sound stuff
 854         PsndOut = NULL;
 855         if (currentConfig.EmuOpt & 4)
 856         {
 857                 sound_prepare();
 858         }
 859
 860         // loop?
 861         while (engineState == PGS_Running)
 862         {
 863                 int modes;
 864
 865                 tval = sceKernelGetSystemTimeLow();
 866                 if (reset_timing || tval < tval_prev) {
 867                         //stdbg("timing reset");
 868                         reset_timing = 0;
 869                         tval_thissec = tval;
 870                         frames_shown = frames_done = 0;
 871                 }
 872
 873                 // show notice message?
 874                 if (noticeMsgTime) {
 875                         static int noticeMsgSum;
 876                         if (tval - noticeMsgTime > 2000000) { // > 2.0 sec
 877                                 noticeMsgTime = 0;
 878                                 clearArea(0);
 879                                 notice = 0;
 880                         } else {
 881                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 882                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 883                                 notice = noticeMsg;
 884                         }
 885                 }
 886
 887                 // check for mode changes
 888                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 889                 if (modes != oldmodes) {
 890                         oldmodes = modes;
 891                         clearArea(1);
 892                         set_scaling_params();
 893                 }
 894
 895                 // second passed?
 896                 if (tval - tval_thissec >= 1000000)
 897                 {
 898                         // missing 1 frame?
 899                         if (currentConfig.Frameskip < 0 && frames_done < target_fps) {
 900                                 SkipFrame(); frames_done++;
 901                         }
 902
 903                         if (currentConfig.EmuOpt & 2)
 904                                 sprintf(fpsbuff, "%02i/%02i  ", frames_shown, frames_done);
 905
 906                         tval_thissec += 1000000;
 907
 908                         if (currentConfig.Frameskip < 0) {
 909                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 910                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 911                                 if (frames_shown > frames_done) frames_shown = frames_done;
 912                         } else {
 913                                 frames_done = frames_shown = 0;
 914                         }
 915                 }
 916 #ifdef PFRAMES
 917                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 918 #endif
 919
 920                 tval_prev = tval;
 921                 lim_time = (frames_done+1) * target_frametime;
 922                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 923                 {
 924                         for (i = 0; i < currentConfig.Frameskip; i++) {
 925                                 updateKeys();
 926                                 SkipFrame(); frames_done++;
 927                                 if (PsndOut) { // do framelimitting if sound is enabled
 928                                         int tval_diff;
 929                                         tval = sceKernelGetSystemTimeLow();
 930                                         tval_diff = (int)(tval - tval_thissec) << 8;
 931                                         if (tval_diff < lim_time) // we are too fast
 932                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 933                                 }
 934                                 lim_time += target_frametime;
 935                         }
 936                 }
 937                 else // auto frameskip
 938                 {
 939                         int tval_diff;
 940                         tval = sceKernelGetSystemTimeLow();
 941                         tval_diff = (int)(tval - tval_thissec) << 8;
 942                         if (tval_diff > lim_time)
 943                         {
 944                                 // no time left for this frame - skip
 945                                 if (tval_diff - lim_time >= (300000<<8)) {
 946                                         /* something caused a slowdown for us (disk access? cache flush?)
 947                                          * try to recover by resetting timing... */
 948                                         reset_timing = 1;
 949                                         continue;
 950                                 }
 951                                 updateKeys();
 952                                 SkipFrame(); frames_done++;
 953                                 continue;
 954                         }
 955                 }
 956
 957                 updateKeys();
 958
 959                 if (!(PicoOpt&0x10))
 960                         EmuScanPrepare();
 961
 962                 PicoFrame();
 963
 964                 blit2(fpsbuff, notice);
 965
 966                 // check time
 967                 tval = sceKernelGetSystemTimeLow();
 968                 tval_diff = (int)(tval - tval_thissec) << 8;
 969
 970                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300000<<8)) // slowdown detection
 971                         reset_timing = 1;
 972                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 973                 {
 974                         // sleep if we are still too fast
 975                         if (tval_diff < lim_time)
 976                         {
 977                                 // we are too fast
 978                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 979                         }
 980                 }
 981
 982                 frames_done++; frames_shown++;
 983         }
 984
 985
 986         if (PicoMCD & 1) PicoCDBufferFree();
 987
 988         if (PsndOut != NULL) {
 989                 PsndOut = NULL;
 990                 sound_end();
 991         }
 992
 993         // save SRAM
 994         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 995                 emu_msg_cb("Writing SRAM/BRAM..");
 996                 emu_SaveLoadGame(0, 1);
 997                 SRam.changed = 0;
 998         }
 999
1000         // clear fps counters and stuff
1001         memset32((int *)psp_video_get_active_fb() + 512*264*2/4, 0, 512*8*2/4);
1002 }
1003
1004
1005 void emu_ResetGame(void)
1006 {
1007         PicoReset(0);
1008         reset_timing = 1;
1009 }
1010