platform/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 "../common/emu.h"
  21 #include "../common/lprintf.h"
  22 #include "../../Pico/PicoInt.h"
  23
  24 #define OSD_FPS_X 424
  25
  26 // additional pspaudio imports, credits to crazyc
  27 int sceAudio_38553111(unsigned short samples, unsigned short freq, char unknown);  // play with conversion?
  28 int sceAudio_5C37C0AE(void);                            // end play?
  29 int sceAudio_E0727056(int volume, void *buffer);        // blocking output
  30 int sceAudioOutput2GetRestSample();
  31
  32
  33 char romFileName[PATH_MAX];
  34 unsigned char *PicoDraw2FB = (unsigned char *)VRAM_CACHED_STUFF + 8; // +8 to be able to skip border with 1 quadword..
  35 int engineState;
  36
  37 static int combo_keys = 0, combo_acts = 0; // keys and actions which need button combos
  38 static unsigned int noticeMsgTime = 0;
  39 int reset_timing = 0; // do we need this?
  40
  41
  42 static void sound_init(void);
  43 static void sound_deinit(void);
  44 static void blit2(const char *fps, const char *notice, int lagging_behind);
  45 static void clearArea(int full);
  46
  47 void emu_noticeMsgUpdated(void)
  48 {
  49         noticeMsgTime = sceKernelGetSystemTimeLow();
  50 }
  51
  52 void emu_getMainDir(char *dst, int len)
  53 {
  54         if (len > 0) *dst = 0;
  55 }
  56
  57 static void osd_text(int x, const char *text, int is_active, int clear_all)
  58 {
  59         unsigned short *screen = is_active ? psp_video_get_active_fb() : psp_screen;
  60         int len = clear_all ? (480 / 2) : (strlen(text) * 8 / 2);
  61         int *p, h;
  62         void *tmp;
  63         for (h = 0; h < 8; h++) {
  64                 p = (int *) (screen+x+512*(264+h));
  65                 p = (int *) ((int)p & ~3); // align
  66                 memset32_uncached(p, 0, len);
  67         }
  68         if (is_active) { tmp = psp_screen; psp_screen = screen; } // nasty pointer tricks
  69         emu_textOut16(x, 264, text);
  70         if (is_active) psp_screen = tmp;
  71 }
  72
  73 void emu_msg_cb(const char *msg)
  74 {
  75         osd_text(4, msg, 1, 1);
  76         noticeMsgTime = sceKernelGetSystemTimeLow() - 2000000;
  77
  78         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  79         reset_timing = 1;
  80 }
  81
  82 static void emu_msg_tray_open(void)
  83 {
  84         strcpy(noticeMsg, "CD tray opened");
  85         noticeMsgTime = sceKernelGetSystemTimeLow();
  86 }
  87
  88
  89 void emu_Init(void)
  90 {
  91         // make dirs for saves, cfgs, etc.
  92         mkdir("mds", 0777);
  93         mkdir("srm", 0777);
  94         mkdir("brm", 0777);
  95         mkdir("cfg", 0777);
  96
  97         sound_init();
  98
  99         PicoInit();
 100         PicoMessage = emu_msg_cb;
 101         PicoMCDopenTray = emu_msg_tray_open;
 102         PicoMCDcloseTray = menu_loop_tray;
 103 }
 104
 105 void emu_Deinit(void)
 106 {
 107         // save SRAM
 108         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 109                 emu_SaveLoadGame(0, 1);
 110                 SRam.changed = 0;
 111         }
 112
 113         if (!(currentConfig.EmuOpt & 0x20)) {
 114                 FILE *f = fopen(PicoConfigFile, "r+b");
 115                 if (!f) emu_WriteConfig(0);
 116                 else {
 117                         // if we already have config, reload it, except last ROM
 118                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 119                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 120                         fseek(f, 0, SEEK_SET);
 121                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 122                         fflush(f);
 123                         fclose(f);
 124                 }
 125         }
 126
 127         PicoExit();
 128         sound_deinit();
 129 }
 130
 131 void emu_setDefaultConfig(void)
 132 {
 133         memset(&currentConfig, 0, sizeof(currentConfig));
 134         currentConfig.lastRomFile[0] = 0;
 135         currentConfig.EmuOpt  = 0x1d | 0x680;  // | confirm_save, cd_leds, acc rend
 136         currentConfig.PicoOpt = 0x0f | 0x1c00; // | gfx_cd, cd_pcm, cd_cdda
 137         currentConfig.PsndRate = 22050;
 138         currentConfig.PicoRegion = 0; // auto
 139         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 140         currentConfig.Frameskip = -1; // auto
 141         currentConfig.volume = 50;
 142         currentConfig.CPUclock = 333;
 143         currentConfig.KeyBinds[ 4] = 1<<0; // SACB RLDU
 144         currentConfig.KeyBinds[ 6] = 1<<1;
 145         currentConfig.KeyBinds[ 7] = 1<<2;
 146         currentConfig.KeyBinds[ 5] = 1<<3;
 147         currentConfig.KeyBinds[14] = 1<<4;
 148         currentConfig.KeyBinds[13] = 1<<5;
 149         currentConfig.KeyBinds[15] = 1<<6;
 150         currentConfig.KeyBinds[ 3] = 1<<7;
 151         currentConfig.KeyBinds[12] = 1<<26; // switch rnd
 152         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 153         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 154         currentConfig.KeyBinds[28] = 1<<0; // num "buttons"
 155         currentConfig.KeyBinds[30] = 1<<1;
 156         currentConfig.KeyBinds[31] = 1<<2;
 157         currentConfig.KeyBinds[29] = 1<<3;
 158         currentConfig.PicoCDBuffers = 64;
 159         currentConfig.scaling = 1;     // bilinear filtering for psp
 160         currentConfig.scale = 1.20;    // fullscreen
 161         currentConfig.hscale40 = 1.25;
 162         currentConfig.hscale32 = 1.56;
 163 }
 164
 165
 166 extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
 167
 168 struct Vertex
 169 {
 170         short u,v;
 171         short x,y,z;
 172 };
 173
 174 static struct Vertex __attribute__((aligned(4))) g_vertices[2];
 175 static unsigned short __attribute__((aligned(16))) localPal[0x100];
 176 static int dynamic_palette = 0, need_pal_upload = 0, blit_16bit_mode = 0;
 177 static int fbimg_offs = 0;
 178
 179 static void set_scaling_params(void)
 180 {
 181         int src_width, fbimg_width, fbimg_height, fbimg_xoffs, fbimg_yoffs, border_hack = 0;
 182         g_vertices[0].x = g_vertices[0].y =
 183         g_vertices[0].z = g_vertices[1].z = 0;
 184
 185         fbimg_height = (int)(240.0 * currentConfig.scale + 0.5);
 186         if (Pico.video.reg[12] & 1) {
 187                 fbimg_width = (int)(320.0 * currentConfig.scale * currentConfig.hscale40 + 0.5);
 188                 src_width = 320;
 189         } else {
 190                 fbimg_width = (int)(256.0 * currentConfig.scale * currentConfig.hscale32 + 0.5);
 191                 src_width = 256;
 192         }
 193
 194         if (fbimg_width  & 1) fbimg_width++;  // make even
 195         if (fbimg_height & 1) fbimg_height++;
 196
 197         if (fbimg_width >= 480) {
 198                 g_vertices[0].u = (fbimg_width-480)/2;
 199                 g_vertices[1].u = src_width - (fbimg_width-480)/2 - 1;
 200                 fbimg_width = 480;
 201                 fbimg_xoffs = 0;
 202         } else {
 203                 g_vertices[0].u = 0;
 204                 g_vertices[1].u = src_width;
 205                 fbimg_xoffs = 240 - fbimg_width/2;
 206         }
 207         if (fbimg_width > 320 && fbimg_width <= 480) border_hack = 1;
 208
 209         if (fbimg_height >= 272) {
 210                 g_vertices[0].v = (fbimg_height-272)/2;
 211                 g_vertices[1].v = 240 - (fbimg_height-272)/2;
 212                 fbimg_height = 272;
 213                 fbimg_yoffs = 0;
 214         } else {
 215                 g_vertices[0].v = 0;
 216                 g_vertices[1].v = 240;
 217                 fbimg_yoffs = 136 - fbimg_height/2;
 218         }
 219
 220         g_vertices[1].x = fbimg_width;
 221         g_vertices[1].y = fbimg_height;
 222         if (fbimg_xoffs < 0) fbimg_xoffs = 0;
 223         if (fbimg_yoffs < 0) fbimg_yoffs = 0;
 224         if (border_hack) {
 225                 g_vertices[0].u++;
 226                 g_vertices[0].x++;
 227                 g_vertices[1].u--;
 228                 g_vertices[1].x--;
 229         }
 230         fbimg_offs = (fbimg_yoffs*512 + fbimg_xoffs) * 2; // dst is always 16bit
 231
 232         /*
 233         lprintf("set_scaling_params:\n");
 234         lprintf("offs: %i, %i\n", fbimg_xoffs, fbimg_yoffs);
 235         lprintf("xy0, xy1: %i, %i; %i, %i\n", g_vertices[0].x, g_vertices[0].y, g_vertices[1].x, g_vertices[1].y);
 236         lprintf("uv0, uv1: %i, %i; %i, %i\n", g_vertices[0].u, g_vertices[0].v, g_vertices[1].u, g_vertices[1].v);
 237         */
 238 }
 239
 240 static void do_pal_update(int allow_sh)
 241 {
 242         unsigned int *spal=(void *)Pico.cram;
 243         unsigned int *dpal=(void *)localPal;
 244         int i;
 245
 246         for (i = 0x3f/2; i >= 0; i--)
 247                 dpal[i] = ((spal[i]&0x000f000f)<< 1)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)<<4);
 248
 249         if (allow_sh && (Pico.video.reg[0xC]&8)) // shadow/hilight?
 250         {
 251                 // shadowed pixels
 252                 for (i = 0x3f/2; i >= 0; i--)
 253                         dpal[0x20|i] = dpal[0x60|i] = (dpal[i]>>1)&0x738e738e;
 254                 // hilighted pixels
 255                 for (i = 0x3f; i >= 0; i--) {
 256                         int t=localPal[i]&0xe71c;t+=0x4208;
 257                         if (t&0x20) t|=0x1c;
 258                         if (t&0x800) t|=0x700;
 259                         if (t&0x10000) t|=0xe000;
 260                         t&=0xe71c;
 261                         localPal[0x80|i]=(unsigned short)t;
 262                 }
 263                 localPal[0xe0] = 0;
 264         }
 265         Pico.m.dirtyPal = 0;
 266         need_pal_upload = 1;
 267 }
 268
 269 static void do_slowmode_lines(int line_to)
 270 {
 271         int line = 0, line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 272         unsigned short *dst = (unsigned short *)VRAM_STUFF + 512*240/2;
 273         unsigned char  *src = (unsigned char  *)VRAM_CACHED_STUFF + 16;
 274         if (!(Pico.video.reg[1]&8)) { line = 8; dst += 512*8; src += 512*8; }
 275
 276         for (; line < line_to; line++, dst+=512, src+=512)
 277                 amips_clut(dst, src, localPal, line_len);
 278 }
 279
 280 static void EmuScanPrepare(void)
 281 {
 282         HighCol = (unsigned char *)VRAM_CACHED_STUFF + 8;
 283         if (!(Pico.video.reg[1]&8)) HighCol += 8*512;
 284
 285         dynamic_palette = 0;
 286         if (Pico.m.dirtyPal)
 287                 do_pal_update(1);
 288 }
 289
 290 static int EmuScanSlow(unsigned int num, void *sdata)
 291 {
 292         if (!(Pico.video.reg[1]&8)) num += 8;
 293
 294         if (Pico.m.dirtyPal) {
 295                 if (!dynamic_palette) {
 296                         do_slowmode_lines(num);
 297                         dynamic_palette = 1;
 298                 }
 299                 do_pal_update(1);
 300         }
 301
 302         if (dynamic_palette) {
 303                 int line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 304                 void *dst = (char *)VRAM_STUFF + 512*240 + 512*2*num;
 305                 amips_clut(dst, HighCol + 8, localPal, line_len);
 306         } else
 307                 HighCol = (unsigned char *)VRAM_CACHED_STUFF + (num+1)*512 + 8;
 308
 309         return 0;
 310 }
 311
 312 static void blitscreen_clut(void)
 313 {
 314         int offs = fbimg_offs;
 315         offs += (psp_screen == VRAM_FB0) ? VRAMOFFS_FB0 : VRAMOFFS_FB1;
 316
 317         sceGuSync(0,0); // sync with prev
 318         sceGuStart(GU_DIRECT, guCmdList);
 319         sceGuDrawBuffer(GU_PSM_5650, (void *)offs, 512); // point to back buffer
 320
 321         if (dynamic_palette)
 322         {
 323                 if (!blit_16bit_mode) {
 324                         sceGuTexMode(GU_PSM_5650, 0, 0, 0);
 325                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 512*240);
 326
 327                         blit_16bit_mode = 1;
 328                 }
 329         }
 330         else
 331         {
 332                 if (blit_16bit_mode) {
 333                         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 334                         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 335                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 336                         blit_16bit_mode = 0;
 337                 }
 338
 339                 if ((PicoOpt&0x10) && Pico.m.dirtyPal)
 340                         do_pal_update(0);
 341
 342                 sceKernelDcacheWritebackAll();
 343
 344                 if (need_pal_upload) {
 345                         need_pal_upload = 0;
 346                         sceGuClutLoad((256/8), localPal); // upload 32*8 entries (256)
 347                 }
 348         }
 349
 350 #if 1
 351         if (g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x)
 352         {
 353                 struct Vertex* vertices;
 354                 int x;
 355
 356                 #define SLICE_WIDTH 32
 357                 for (x = 0; x < g_vertices[1].x; x += SLICE_WIDTH)
 358                 {
 359                         // render sprite
 360                         vertices = (struct Vertex*)sceGuGetMemory(2 * sizeof(struct Vertex));
 361                         memcpy(vertices, g_vertices, 2 * sizeof(struct Vertex));
 362                         vertices[0].u = vertices[0].x = x;
 363                         vertices[1].u = vertices[1].x = x + SLICE_WIDTH;
 364                         sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,vertices);
 365                 }
 366                 // lprintf("listlen: %iB\n", sceGuCheckList()); // ~480 only
 367         }
 368         else
 369 #endif
 370                 sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,g_vertices);
 371
 372         sceGuFinish();
 373 }
 374
 375
 376 static void cd_leds(void)
 377 {
 378         unsigned int reg, col_g, col_r, *p;
 379
 380         reg = Pico_mcd->s68k_regs[0];
 381
 382         p = (unsigned int *)((short *)psp_screen + 512*2+4+2);
 383         col_g = (reg & 2) ? 0x06000600 : 0;
 384         col_r = (reg & 1) ? 0x00180018 : 0;
 385         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 386         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 387         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 388 }
 389
 390 #if 0
 391 static void dbg_text(void)
 392 {
 393         int *p, h, len;
 394         char text[128];
 395
 396         sprintf(text, "sl: %i, 16b: %i", g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x, blit_16bit_mode);
 397         len = strlen(text) * 8 / 2;
 398         for (h = 0; h < 8; h++) {
 399                 p = (int *) ((unsigned short *) psp_screen+2+512*(256+h));
 400                 p = (int *) ((int)p & ~3); // align
 401                 memset32_uncached(p, 0, len);
 402         }
 403         emu_textOut16(2, 256, text);
 404 }
 405 #endif
 406
 407 /* called after rendering is done, but frame emulation is not finished */
 408 void blit1(void)
 409 {
 410         if (PicoOpt&0x10)
 411         {
 412                 int i;
 413                 unsigned char *pd;
 414                 // clear top and bottom trash
 415                 for (pd = PicoDraw2FB+8, i = 8; i > 0; i--, pd += 512)
 416                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 417                 for (pd = PicoDraw2FB+512*232+8, i = 8; i > 0; i--, pd += 512)
 418                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 419         }
 420
 421         blitscreen_clut();
 422 }
 423
 424
 425 static void blit2(const char *fps, const char *notice, int lagging_behind)
 426 {
 427         int vsync = 0, emu_opt = currentConfig.EmuOpt;
 428
 429         if (notice || (emu_opt & 2)) {
 430                 if (notice)      osd_text(4, notice, 0, 0);
 431                 if (emu_opt & 2) osd_text(OSD_FPS_X, fps, 0, 0);
 432         }
 433
 434         //dbg_text();
 435
 436         if ((emu_opt & 0x400) && (PicoMCD & 1))
 437                 cd_leds();
 438
 439         if (currentConfig.EmuOpt & 0x2000) { // want vsync
 440                 if (!(currentConfig.EmuOpt & 0x10000) || !lagging_behind) vsync = 1;
 441         }
 442
 443         psp_video_flip(vsync);
 444 }
 445
 446 // clears whole screen or just the notice area (in all buffers)
 447 static void clearArea(int full)
 448 {
 449         if (full) {
 450                 memset32_uncached(psp_screen, 0, 512*272*2/4);
 451                 psp_video_flip(0);
 452                 memset32_uncached(psp_screen, 0, 512*272*2/4);
 453                 memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*240/4);
 454                 memset32((int *)VRAM_CACHED_STUFF+512*240/4, 0, 512*240*2/4);
 455         } else {
 456                 void *fb = psp_video_get_active_fb();
 457                 memset32_uncached((int *)((char *)psp_screen + 512*264*2), 0, 512*8*2/4);
 458                 memset32_uncached((int *)((char *)fb         + 512*264*2), 0, 512*8*2/4);
 459         }
 460 }
 461
 462 static void vidResetMode(void)
 463 {
 464         // setup GU
 465         sceGuSync(0,0); // sync with prev
 466         sceGuStart(GU_DIRECT, guCmdList);
 467
 468         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 469         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 470         sceGuTexFunc(GU_TFX_REPLACE,GU_TCC_RGB);
 471         if (currentConfig.scaling)
 472              sceGuTexFilter(GU_LINEAR, GU_LINEAR);
 473         else sceGuTexFilter(GU_NEAREST, GU_NEAREST);
 474         sceGuTexScale(1.0f,1.0f);
 475         sceGuTexOffset(0.0f,0.0f);
 476
 477         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 478
 479         // slow rend.
 480         PicoDrawSetColorFormat(-1);
 481         PicoScan = EmuScanSlow;
 482
 483         localPal[0xe0] = 0;
 484         Pico.m.dirtyPal = 1;
 485         blit_16bit_mode = dynamic_palette = 0;
 486
 487         sceGuFinish();
 488         set_scaling_params();
 489         sceGuSync(0,0);
 490 }
 491
 492
 493 /* sound stuff */
 494 #define SOUND_BLOCK_SIZE_NTSC (1470*2) // 1024 // 1152
 495 #define SOUND_BLOCK_SIZE_PAL  (1764*2)
 496 #define SOUND_BLOCK_COUNT    8
 497
 498 static short __attribute__((aligned(4))) sndBuffer[SOUND_BLOCK_SIZE_PAL*SOUND_BLOCK_COUNT + 44100/50*2];
 499 static short *snd_playptr = NULL, *sndBuffer_endptr = NULL;
 500 static int samples_made = 0, samples_done = 0, samples_block = 0;
 501 static int sound_thread_exit = 0;
 502 static SceUID sound_sem = -1;
 503
 504 static void writeSound(int len);
 505
 506 static int sound_thread(SceSize args, void *argp)
 507 {
 508         int ret = 0;
 509
 510         lprintf("sthr: started, priority %i\n", sceKernelGetThreadCurrentPriority());
 511
 512         while (!sound_thread_exit)
 513         {
 514                 if (samples_made - samples_done < samples_block) {
 515                         // wait for data (use at least 2 blocks)
 516                         //lprintf("sthr: wait... (%i)\n", samples_made - samples_done);
 517                         while (samples_made - samples_done <= samples_block*2 && !sound_thread_exit)
 518                                 ret = sceKernelWaitSema(sound_sem, 1, 0);
 519                         if (ret < 0) lprintf("sthr: sceKernelWaitSema: %i\n", ret);
 520                         continue;
 521                 }
 522
 523                 // lprintf("sthr: got data: %i\n", samples_made - samples_done);
 524
 525                 ret = sceAudio_E0727056(PSP_AUDIO_VOLUME_MAX, snd_playptr);
 526
 527                 samples_done += samples_block;
 528                 snd_playptr  += samples_block;
 529                 if (snd_playptr >= sndBuffer_endptr)
 530                         snd_playptr = sndBuffer;
 531                 // 1.5 kernel returns 0, newer ones return # of samples queued
 532                 if (ret < 0)
 533                         lprintf("sthr: sceAudio_E0727056: %08x; pos %i/%i\n", ret, samples_done, samples_made);
 534
 535                 // shouln't happen, but just in case
 536                 if (samples_made - samples_done >= samples_block*3) {
 537                         lprintf("sthr: block skip (%i)\n", samples_made - samples_done);
 538                         samples_done += samples_block; // skip
 539                         snd_playptr  += samples_block;
 540                 }
 541
 542         }
 543
 544         lprintf("sthr: exit\n");
 545         sceKernelExitDeleteThread(0);
 546         return 0;
 547 }
 548
 549 static void sound_init(void)
 550 {
 551         SceUID thid;
 552         int ret;
 553
 554         sound_sem = sceKernelCreateSema("sndsem", 0, 0, 1, NULL);
 555         if (sound_sem < 0) lprintf("sceKernelCreateSema() failed: %i\n", sound_sem);
 556
 557         samples_made = samples_done = 0;
 558         samples_block = SOUND_BLOCK_SIZE_NTSC; // make sure it goes to sema
 559         sound_thread_exit = 0;
 560         thid = sceKernelCreateThread("sndthread", sound_thread, 0x12, 0x10000, 0, NULL);
 561         if (thid >= 0)
 562         {
 563                 ret = sceKernelStartThread(thid, 0, 0);
 564                 if (ret < 0) lprintf("sound_init: sceKernelStartThread returned %08x\n", ret);
 565         }
 566         else
 567                 lprintf("sceKernelCreateThread failed: %i\n", thid);
 568 }
 569
 570 static void sound_prepare(void)
 571 {
 572         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 573         int ret, stereo;
 574
 575         samples_made = samples_done = 0;
 576
 577         if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 578                 PsndRerate(Pico.m.frame_count ? 1 : 0);
 579         }
 580         stereo=(PicoOpt&8)>>3;
 581
 582         samples_block = Pico.m.pal ? SOUND_BLOCK_SIZE_PAL : SOUND_BLOCK_SIZE_NTSC;
 583         if (PsndRate <= 22050) samples_block /= 2;
 584         sndBuffer_endptr = &sndBuffer[samples_block*SOUND_BLOCK_COUNT];
 585
 586         lprintf("starting audio: %i, len: %i, stereo: %i, pal: %i, block samples: %i\n",
 587                         PsndRate, PsndLen, stereo, Pico.m.pal, samples_block);
 588
 589         // while (sceAudioOutput2GetRestSample() > 0) psp_msleep(100);
 590         // sceAudio_5C37C0AE();
 591         ret = sceAudio_38553111(samples_block/2, PsndRate, 2); // seems to not need that stupid 64byte alignment
 592         if (ret < 0) {
 593                 lprintf("sceAudio_38553111() failed: %i\n", ret);
 594                 sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 595                 noticeMsgTime = sceKernelGetSystemTimeLow();
 596                 currentConfig.EmuOpt &= ~4;
 597         } else {
 598                 PicoWriteSound = writeSound;
 599                 memset32((int *)(void *)sndBuffer, 0, sizeof(sndBuffer)/4);
 600                 snd_playptr = sndBuffer_endptr - samples_block;
 601                 samples_made = samples_block; // send 1 empty block first..
 602                 PsndOut = sndBuffer;
 603                 PsndRate_old = PsndRate;
 604                 PicoOpt_old  = PicoOpt;
 605                 pal_old = Pico.m.pal;
 606         }
 607 }
 608
 609 static void sound_end(void)
 610 {
 611         int i;
 612         if (samples_done == 0)
 613         {
 614                 // if no data is written between sceAudio_38553111 and sceAudio_5C37C0AE calls,
 615                 // we get a deadlock on next sceAudio_38553111 call
 616                 // so this is yet another workaround:
 617                 memset32((int *)(void *)sndBuffer, 0, samples_block*4/4);
 618                 samples_made = samples_block * 3;
 619                 sceKernelSignalSema(sound_sem, 1);
 620         }
 621         sceKernelDelayThread(100*1000);
 622         samples_made = samples_done = 0;
 623         for (i = 0; sceAudioOutput2GetRestSample() > 0 && i < 16; i++)
 624                 psp_msleep(100);
 625         sceAudio_5C37C0AE();
 626 }
 627
 628 static void sound_deinit(void)
 629 {
 630         sound_thread_exit = 1;
 631         sceKernelSignalSema(sound_sem, 1);
 632         sceKernelDeleteSema(sound_sem);
 633         sound_sem = -1;
 634 }
 635
 636 static void writeSound(int len)
 637 {
 638         int ret;
 639         if (PicoOpt&8) len<<=1;
 640
 641         PsndOut += len;
 642         /*if (PsndOut > sndBuffer_endptr) {
 643                 memcpy32((int *)(void *)sndBuffer, (int *)endptr, (PsndOut - endptr + 1) / 2);
 644                 PsndOut = &sndBuffer[PsndOut - endptr];
 645                 lprintf("mov\n");
 646         }
 647         else*/
 648         if (PsndOut > sndBuffer_endptr) lprintf("snd oflow %i!\n", PsndOut - sndBuffer_endptr);
 649         if (PsndOut >= sndBuffer_endptr)
 650                 PsndOut = sndBuffer;
 651
 652         // signal the snd thread
 653         samples_made += len;
 654         if (samples_made - samples_done > samples_block*2) {
 655                 // lprintf("signal, %i/%i\n", samples_done, samples_made);
 656                 ret = sceKernelSignalSema(sound_sem, 1);
 657                 //if (ret < 0) lprintf("snd signal ret %08x\n", ret);
 658         }
 659 }
 660
 661
 662 static void SkipFrame(void)
 663 {
 664         PicoSkipFrame=1;
 665         PicoFrame();
 666         PicoSkipFrame=0;
 667 }
 668
 669 void emu_forcedFrame(void)
 670 {
 671         int po_old = PicoOpt;
 672         int eo_old = currentConfig.EmuOpt;
 673
 674         PicoOpt &= ~0x0010;
 675         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 676         currentConfig.EmuOpt |= 0x80;
 677
 678         vidResetMode();
 679         memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*8/4); // borders
 680         memset32((int *)VRAM_CACHED_STUFF + 512*232/4, 0xe0e0e0e0, 512*8/4);
 681         memset32_uncached((int *)psp_screen + 512*264*2/4, 0, 512*8*2/4);
 682
 683         PicoDrawSetColorFormat(-1);
 684         PicoScan = EmuScanSlow;
 685         EmuScanPrepare();
 686         PicoFrameDrawOnly();
 687         blit1();
 688         sceGuSync(0,0);
 689
 690         PicoOpt = po_old;
 691         currentConfig.EmuOpt = eo_old;
 692 }
 693
 694
 695 static void RunEvents(unsigned int which)
 696 {
 697         if (which & 0x1800) // save or load (but not both)
 698         {
 699                 int do_it = 1;
 700
 701                 if ( emu_checkSaveFile(state_slot) &&
 702                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 703                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 704                 {
 705                         int keys;
 706                         sceGuSync(0,0);
 707                         blit2("", (which & 0x1000) ? "LOAD STATE? (X=yes, O=no)" : "OVERWRITE SAVE? (X=yes, O=no)", 0);
 708                         while( !((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) )
 709                                 psp_msleep(50);
 710                         if (keys & BTN_CIRCLE) do_it = 0;
 711                         while(  ((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) ) // wait for release
 712                                 psp_msleep(50);
 713                         clearArea(0);
 714                 }
 715
 716                 if (do_it)
 717                 {
 718                         osd_text(4, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME", 1, 0);
 719                         PicoStateProgressCB = emu_msg_cb;
 720                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 721                         PicoStateProgressCB = NULL;
 722                         psp_msleep(0);
 723                 }
 724
 725                 reset_timing = 1;
 726         }
 727         if (which & 0x0400) // switch renderer
 728         {
 729                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 730                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 731
 732                 vidResetMode();
 733
 734                 if (PicoOpt&0x10)
 735                         strcpy(noticeMsg, "fast renderer");
 736                 else if (currentConfig.EmuOpt&0x80)
 737                         strcpy(noticeMsg, "accurate renderer");
 738
 739                 noticeMsgTime = sceKernelGetSystemTimeLow();
 740         }
 741         if (which & 0x0300)
 742         {
 743                 if(which&0x0200) {
 744                         state_slot -= 1;
 745                         if(state_slot < 0) state_slot = 9;
 746                 } else {
 747                         state_slot += 1;
 748                         if(state_slot > 9) state_slot = 0;
 749                 }
 750                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 751                 noticeMsgTime = sceKernelGetSystemTimeLow();
 752         }
 753 }
 754
 755 static void updateKeys(void)
 756 {
 757         unsigned int keys, allActions[2] = { 0, 0 }, events;
 758         static unsigned int prevEvents = 0;
 759         int i;
 760
 761         keys = psp_pad_read(0);
 762         if (keys & PSP_CTRL_HOME)
 763                 sceDisplayWaitVblankStart();
 764
 765         if (keys & BTN_SELECT)
 766                 engineState = PGS_Menu;
 767
 768         keys &= CONFIGURABLE_KEYS;
 769
 770         for (i = 0; i < 32; i++)
 771         {
 772                 if (keys & (1 << i))
 773                 {
 774                         int pl, acts = currentConfig.KeyBinds[i];
 775                         if (!acts) continue;
 776                         pl = (acts >> 16) & 1;
 777                         if (combo_keys & (1 << i))
 778                         {
 779                                 int u = i+1, acts_c = acts & combo_acts;
 780                                 // let's try to find the other one
 781                                 if (acts_c)
 782                                         for (; u < 32; u++)
 783                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 784                                                         allActions[pl] |= acts_c;
 785                                                         keys &= ~((1 << i) | (1 << u));
 786                                                         break;
 787                                                 }
 788                                 // add non-combo actions if combo ones were not found
 789                                 if (!acts_c || u == 32)
 790                                         allActions[pl] |= acts & ~combo_acts;
 791                         } else {
 792                                 allActions[pl] |= acts;
 793                         }
 794                 }
 795         }
 796
 797         PicoPad[0] = (unsigned short) allActions[0];
 798         PicoPad[1] = (unsigned short) allActions[1];
 799
 800         events = (allActions[0] | allActions[1]) >> 16;
 801
 802         // volume is treated in special way and triggered every frame
 803         if ((events & 0x6000) && PsndOut != NULL)
 804         {
 805                 int vol = currentConfig.volume;
 806                 if (events & 0x2000) {
 807                         if (vol < 100) vol++;
 808                 } else {
 809                         if (vol >   0) vol--;
 810                 }
 811                 // FrameworkAudio_SetVolume(vol, vol); // TODO
 812                 sprintf(noticeMsg, "VOL: %02i ", vol);
 813                 noticeMsgTime = sceKernelGetSystemTimeLow();
 814                 currentConfig.volume = vol;
 815         }
 816
 817         events &= ~prevEvents;
 818         if (events) RunEvents(events);
 819         if (movie_data) emu_updateMovie();
 820
 821         prevEvents = (allActions[0] | allActions[1]) >> 16;
 822 }
 823
 824 static void find_combos(void)
 825 {
 826         int act, u;
 827
 828         // find out which keys and actions are combos
 829         combo_keys = combo_acts = 0;
 830         for (act = 0; act < 32; act++)
 831         {
 832                 int keyc = 0, keyc2 = 0;
 833                 if (act == 16 || act == 17) continue; // player2 flag
 834                 if (act > 17)
 835                 {
 836                         for (u = 0; u < 28; u++) // 28 because nub can't produce combos
 837                                 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
 838                 }
 839                 else
 840                 {
 841                         for (u = 0; u < 28; u++)
 842                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 0 && // pl. 1
 843                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc++;
 844                         for (u = 0; u < 28; u++)
 845                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 1 && // pl. 2
 846                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc2++;
 847                 }
 848                 if (keyc > 1 || keyc2 > 1)
 849                 {
 850                         // loop again and mark those keys and actions as combo
 851                         for (u = 0; u < 28; u++)
 852                         {
 853                                 if (currentConfig.KeyBinds[u] & (1 << act)) {
 854                                         combo_keys |= 1 << u;
 855                                         combo_acts |= 1 << act;
 856                                 }
 857                         }
 858                 }
 859         }
 860 }
 861
 862
 863 static void simpleWait(unsigned int until)
 864 {
 865         unsigned int tval;
 866         int diff;
 867
 868         tval = sceKernelGetSystemTimeLow();
 869         diff = (int)until - (int)tval;
 870         if (diff >= 512 && diff < 100*1024)
 871                 sceKernelDelayThread(diff);
 872 }
 873
 874 void emu_Loop(void)
 875 {
 876         static int mp3_init_done = 0;
 877         char fpsbuff[24]; // fps count c string
 878         unsigned int tval, tval_prev = 0, tval_thissec = 0; // timing
 879         int frames_done = 0, frames_shown = 0, oldmodes = 0;
 880         int target_fps, target_frametime, lim_time, tval_diff, i;
 881         char *notice = NULL;
 882
 883         lprintf("entered emu_Loop()\n");
 884
 885         fpsbuff[0] = 0;
 886
 887         if (currentConfig.CPUclock != psp_get_cpu_clock()) {
 888                 lprintf("setting cpu clock to %iMHz... ", currentConfig.CPUclock);
 889                 i = psp_set_cpu_clock(currentConfig.CPUclock);
 890                 lprintf(i ? "failed\n" : "done\n");
 891                 currentConfig.CPUclock = psp_get_cpu_clock();
 892         }
 893
 894         // make sure we are in correct mode
 895         vidResetMode();
 896         clearArea(1);
 897         Pico.m.dirtyPal = 1;
 898         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 899         find_combos();
 900
 901         // pal/ntsc might have changed, reset related stuff
 902         target_fps = Pico.m.pal ? 50 : 60;
 903         target_frametime = Pico.m.pal ? (1000000<<8)/50 : (1000000<<8)/60+1;
 904         reset_timing = 1;
 905
 906         if (PicoMCD & 1) {
 907                 // prepare CD buffer
 908                 PicoCDBufferInit();
 909                 // mp3...
 910                 if (!mp3_init_done) {
 911                         i = mp3_init();
 912                         mp3_init_done = 1;
 913                         if (i) { engineState = PGS_Menu; return; }
 914                 }
 915         }
 916
 917         // prepare sound stuff
 918         PsndOut = NULL;
 919         if (currentConfig.EmuOpt & 4)
 920         {
 921                 sound_prepare();
 922         }
 923
 924         sceDisplayWaitVblankStart();
 925
 926         // loop?
 927         while (engineState == PGS_Running)
 928         {
 929                 int modes;
 930
 931                 tval = sceKernelGetSystemTimeLow();
 932                 if (reset_timing || tval < tval_prev) {
 933                         //stdbg("timing reset");
 934                         reset_timing = 0;
 935                         tval_thissec = tval;
 936                         frames_shown = frames_done = 0;
 937                 }
 938
 939                 // show notice message?
 940                 if (noticeMsgTime) {
 941                         static int noticeMsgSum;
 942                         if (tval - noticeMsgTime > 2000000) { // > 2.0 sec
 943                                 noticeMsgTime = 0;
 944                                 clearArea(0);
 945                                 notice = 0;
 946                         } else {
 947                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 948                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 949                                 notice = noticeMsg;
 950                         }
 951                 }
 952
 953                 // check for mode changes
 954                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 955                 if (modes != oldmodes) {
 956                         oldmodes = modes;
 957                         clearArea(1);
 958                         set_scaling_params();
 959                 }
 960
 961                 // second passed?
 962                 if (tval - tval_thissec >= 1000000)
 963                 {
 964                         // missing 1 frame?
 965                         if (currentConfig.Frameskip < 0 && frames_done < target_fps) {
 966                                 SkipFrame(); frames_done++;
 967                         }
 968
 969                         if (currentConfig.EmuOpt & 2)
 970                                 sprintf(fpsbuff, "%02i/%02i  ", frames_shown, frames_done);
 971
 972                         tval_thissec += 1000000;
 973
 974                         if (currentConfig.Frameskip < 0) {
 975                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 976                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 977                                 if (frames_shown > frames_done) frames_shown = frames_done;
 978                         } else {
 979                                 frames_done = frames_shown = 0;
 980                         }
 981                 }
 982 #ifdef PFRAMES
 983                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 984 #endif
 985
 986                 tval_prev = tval;
 987                 lim_time = (frames_done+1) * target_frametime;
 988                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 989                 {
 990                         for (i = 0; i < currentConfig.Frameskip; i++) {
 991                                 updateKeys();
 992                                 SkipFrame(); frames_done++;
 993                                 if (!(currentConfig.EmuOpt&0x40000)) { // do framelimitting if needed
 994                                         int tval_diff;
 995                                         tval = sceKernelGetSystemTimeLow();
 996                                         tval_diff = (int)(tval - tval_thissec) << 8;
 997                                         if (tval_diff < lim_time) // we are too fast
 998                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 999                                 }
1000                                 lim_time += target_frametime;
1001                         }
1002                 }
1003                 else // auto frameskip
1004                 {
1005                         int tval_diff;
1006                         tval = sceKernelGetSystemTimeLow();
1007                         tval_diff = (int)(tval - tval_thissec) << 8;
1008                         if (tval_diff > lim_time && (frames_done/16 < frames_shown))
1009                         {
1010                                 // no time left for this frame - skip
1011                                 if (tval_diff - lim_time >= (300000<<8)) {
1012                                         reset_timing = 1;
1013                                         continue;
1014                                 }
1015                                 updateKeys();
1016                                 SkipFrame(); frames_done++;
1017                                 continue;
1018                         }
1019                 }
1020
1021                 updateKeys();
1022
1023                 if (!(PicoOpt&0x10))
1024                         EmuScanPrepare();
1025
1026                 PicoFrame();
1027
1028                 sceGuSync(0,0);
1029
1030                 // check time
1031                 tval = sceKernelGetSystemTimeLow();
1032                 tval_diff = (int)(tval - tval_thissec) << 8;
1033
1034                 blit2(fpsbuff, notice, tval_diff > lim_time);
1035
1036                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300000<<8)) // slowdown detection
1037                         reset_timing = 1;
1038                 else if (!(currentConfig.EmuOpt&0x40000) || currentConfig.Frameskip < 0)
1039                 {
1040                         // sleep if we are still too fast
1041                         if (tval_diff < lim_time)
1042                         {
1043                                 // we are too fast
1044                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
1045                         }
1046                 }
1047
1048                 frames_done++; frames_shown++;
1049         }
1050
1051
1052         if (PicoMCD & 1) PicoCDBufferFree();
1053
1054         if (PsndOut != NULL) {
1055                 PsndOut = NULL;
1056                 sound_end();
1057         }
1058
1059         // save SRAM
1060         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
1061                 emu_msg_cb("Writing SRAM/BRAM..");
1062                 emu_SaveLoadGame(0, 1);
1063                 SRam.changed = 0;
1064         }
1065
1066         // clear fps counters and stuff
1067         memset32_uncached((int *)psp_video_get_active_fb() + 512*264*2/4, 0, 512*8*2/4);
1068 }
1069
1070
1071 void emu_ResetGame(void)
1072 {
1073         PicoReset(0);
1074         reset_timing = 1;
1075 }
1076