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