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 "mp3.h"
  15 #include "../common/emu.h"
  16 #include "../common/lprintf.h"
  17 #include "../../Pico/PicoInt.h"
  18
  19 #define OSD_FPS_X 424
  20
  21 // additional pspaudio imports, credits to crazyc
  22 int sceAudio_38553111(unsigned short samples, unsigned short freq, char unknown);  // play with conversion?
  23 int sceAudio_5C37C0AE(void);                            // end play?
  24 int sceAudio_E0727056(int volume, void *buffer);        // blocking output
  25 int sceAudioOutput2GetRestSample();
  26
  27
  28 char romFileName[PATH_MAX];
  29 unsigned char *PicoDraw2FB = (unsigned char *)VRAM_CACHED_STUFF + 8; // +8 to be able to skip border with 1 quadword..
  30 int engineState;
  31
  32 static int combo_keys = 0, combo_acts = 0; // keys and actions which need button combos
  33 static unsigned int noticeMsgTime = 0;
  34 int reset_timing = 0; // do we need this?
  35
  36
  37 static void sound_init(void);
  38 static void sound_deinit(void);
  39 static void blit2(const char *fps, const char *notice, int lagging_behind);
  40 static void clearArea(int full);
  41
  42 void emu_noticeMsgUpdated(void)
  43 {
  44         noticeMsgTime = sceKernelGetSystemTimeLow();
  45 }
  46
  47 void emu_getMainDir(char *dst, int len)
  48 {
  49         if (len > 0) *dst = 0;
  50 }
  51
  52 static void osd_text(int x, const char *text, int is_active, int clear_all)
  53 {
  54         unsigned short *screen = is_active ? psp_video_get_active_fb() : psp_screen;
  55         int len = clear_all ? (480 / 2) : (strlen(text) * 8 / 2);
  56         int *p, h;
  57         void *tmp;
  58         for (h = 0; h < 8; h++) {
  59                 p = (int *) (screen+x+512*(264+h));
  60                 p = (int *) ((int)p & ~3); // align
  61                 memset32_uncached(p, 0, len);
  62         }
  63         if (is_active) { tmp = psp_screen; psp_screen = screen; } // nasty pointer tricks
  64         emu_textOut16(x, 264, text);
  65         if (is_active) psp_screen = tmp;
  66 }
  67
  68 void emu_msg_cb(const char *msg)
  69 {
  70         osd_text(4, msg, 1, 1);
  71         noticeMsgTime = sceKernelGetSystemTimeLow() - 2000000;
  72
  73         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  74         reset_timing = 1;
  75 }
  76
  77 static void emu_msg_tray_open(void)
  78 {
  79         strcpy(noticeMsg, "CD tray opened");
  80         noticeMsgTime = sceKernelGetSystemTimeLow();
  81 }
  82
  83
  84 void emu_Init(void)
  85 {
  86         // make dirs for saves, cfgs, etc.
  87         mkdir("mds", 0777);
  88         mkdir("srm", 0777);
  89         mkdir("brm", 0777);
  90         mkdir("cfg", 0777);
  91
  92         sound_init();
  93
  94         PicoInit();
  95         PicoMessage = emu_msg_cb;
  96         PicoMCDopenTray = emu_msg_tray_open;
  97         PicoMCDcloseTray = menu_loop_tray;
  98 }
  99
 100 void emu_Deinit(void)
 101 {
 102         // save SRAM
 103         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 104                 emu_SaveLoadGame(0, 1);
 105                 SRam.changed = 0;
 106         }
 107
 108         if (!(currentConfig.EmuOpt & 0x20)) {
 109                 FILE *f = fopen(PicoConfigFile, "r+b");
 110                 if (!f) emu_WriteConfig(0);
 111                 else {
 112                         // if we already have config, reload it, except last ROM
 113                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 114                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 115                         fseek(f, 0, SEEK_SET);
 116                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 117                         fflush(f);
 118                         fclose(f);
 119                 }
 120         }
 121
 122         PicoExit();
 123         sound_deinit();
 124 }
 125
 126 void emu_setDefaultConfig(void)
 127 {
 128         memset(&currentConfig, 0, sizeof(currentConfig));
 129         currentConfig.lastRomFile[0] = 0;
 130         currentConfig.EmuOpt  = 0x1d | 0x680;  // | confirm_save, cd_leds, acc rend
 131         currentConfig.PicoOpt = 0x0f | 0x1c00; // | gfx_cd, cd_pcm, cd_cdda
 132         currentConfig.PsndRate = 22050;
 133         currentConfig.PicoRegion = 0; // auto
 134         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 135         currentConfig.Frameskip = -1; // auto
 136         currentConfig.volume = 50;
 137         currentConfig.CPUclock = 333;
 138         currentConfig.KeyBinds[ 4] = 1<<0; // SACB RLDU
 139         currentConfig.KeyBinds[ 6] = 1<<1;
 140         currentConfig.KeyBinds[ 7] = 1<<2;
 141         currentConfig.KeyBinds[ 5] = 1<<3;
 142         currentConfig.KeyBinds[14] = 1<<4;
 143         currentConfig.KeyBinds[13] = 1<<5;
 144         currentConfig.KeyBinds[15] = 1<<6;
 145         currentConfig.KeyBinds[ 3] = 1<<7;
 146         currentConfig.KeyBinds[12] = 1<<26; // switch rnd
 147         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 148         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 149         currentConfig.KeyBinds[28] = 1<<0; // num "buttons"
 150         currentConfig.KeyBinds[30] = 1<<1;
 151         currentConfig.KeyBinds[31] = 1<<2;
 152         currentConfig.KeyBinds[29] = 1<<3;
 153         currentConfig.PicoCDBuffers = 64;
 154         currentConfig.scaling = 1;     // bilinear filtering for psp
 155         currentConfig.scale = 1.20;    // fullscreen
 156         currentConfig.hscale40 = 1.25;
 157         currentConfig.hscale32 = 1.56;
 158 }
 159
 160
 161 extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
 162
 163 struct Vertex
 164 {
 165         short u,v;
 166         short x,y,z;
 167 };
 168
 169 static struct Vertex __attribute__((aligned(4))) g_vertices[2];
 170 static unsigned short __attribute__((aligned(16))) localPal[0x100];
 171 static int dynamic_palette = 0, need_pal_upload = 0, blit_16bit_mode = 0;
 172 static int fbimg_offs = 0;
 173
 174 static void set_scaling_params(void)
 175 {
 176         int src_width, fbimg_width, fbimg_height, fbimg_xoffs, fbimg_yoffs, border_hack = 0;
 177         g_vertices[0].x = g_vertices[0].y =
 178         g_vertices[0].z = g_vertices[1].z = 0;
 179
 180         fbimg_height = (int)(240.0 * currentConfig.scale + 0.5);
 181         if (Pico.video.reg[12] & 1) {
 182                 fbimg_width = (int)(320.0 * currentConfig.scale * currentConfig.hscale40 + 0.5);
 183                 src_width = 320;
 184         } else {
 185                 fbimg_width = (int)(256.0 * currentConfig.scale * currentConfig.hscale32 + 0.5);
 186                 src_width = 256;
 187         }
 188
 189         if (fbimg_width  & 1) fbimg_width++;  // make even
 190         if (fbimg_height & 1) fbimg_height++;
 191
 192         if (fbimg_width >= 480) {
 193                 g_vertices[0].u = (fbimg_width-480)/2;
 194                 g_vertices[1].u = src_width - (fbimg_width-480)/2 - 1;
 195                 if (fbimg_width == 480) border_hack = 1;
 196                 fbimg_width = 480;
 197                 fbimg_xoffs = 0;
 198         } else {
 199                 g_vertices[0].u = 0;
 200                 g_vertices[1].u = src_width;
 201                 fbimg_xoffs = 240 - fbimg_width/2;
 202         }
 203
 204         if (fbimg_height >= 272) {
 205                 g_vertices[0].v = (fbimg_height-272)/2;
 206                 g_vertices[1].v = 240 - (fbimg_height-272)/2;
 207                 fbimg_height = 272;
 208                 fbimg_yoffs = 0;
 209         } else {
 210                 g_vertices[0].v = 0;
 211                 g_vertices[1].v = 240;
 212                 fbimg_yoffs = 136 - fbimg_height/2;
 213         }
 214
 215         g_vertices[1].x = fbimg_width;
 216         g_vertices[1].y = fbimg_height;
 217         if (fbimg_xoffs < 0) fbimg_xoffs = 0;
 218         if (fbimg_yoffs < 0) fbimg_yoffs = 0;
 219         if (border_hack) {
 220                 g_vertices[0].u++;
 221                 g_vertices[0].x++;
 222                 g_vertices[1].u--;
 223                 g_vertices[1].x--;
 224         }
 225         fbimg_offs = (fbimg_yoffs*512 + fbimg_xoffs) * 2; // dst is always 16bit
 226
 227         /*
 228         lprintf("set_scaling_params:\n");
 229         lprintf("offs: %i, %i\n", fbimg_xoffs, fbimg_yoffs);
 230         lprintf("xy0, xy1: %i, %i; %i, %i\n", g_vertices[0].x, g_vertices[0].y, g_vertices[1].x, g_vertices[1].y);
 231         lprintf("uv0, uv1: %i, %i; %i, %i\n", g_vertices[0].u, g_vertices[0].v, g_vertices[1].u, g_vertices[1].v);
 232         */
 233 }
 234
 235 static void do_pal_update(int allow_sh)
 236 {
 237         unsigned int *spal=(void *)Pico.cram;
 238         unsigned int *dpal=(void *)localPal;
 239         int i;
 240
 241         for (i = 0x3f/2; i >= 0; i--)
 242                 dpal[i] = ((spal[i]&0x000f000f)<< 1)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)<<4);
 243
 244         if (allow_sh && (Pico.video.reg[0xC]&8)) // shadow/hilight?
 245         {
 246                 // shadowed pixels
 247                 for (i = 0x3f/2; i >= 0; i--)
 248                         dpal[0x20|i] = dpal[0x60|i] = (dpal[i]>>1)&0x738e738e;
 249                 // hilighted pixels
 250                 for (i = 0x3f; i >= 0; i--) {
 251                         int t=localPal[i]&0xe71c;t+=0x4208;
 252                         if (t&0x20) t|=0x1c;
 253                         if (t&0x800) t|=0x700;
 254                         if (t&0x10000) t|=0xe000;
 255                         t&=0xe71c;
 256                         localPal[0x80|i]=(unsigned short)t;
 257                 }
 258                 localPal[0xe0] = 0;
 259         }
 260         Pico.m.dirtyPal = 0;
 261         need_pal_upload = 1;
 262 }
 263
 264 static void do_slowmode_lines(int line_to)
 265 {
 266         int line = 0, line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 267         unsigned short *dst = (unsigned short *)VRAM_STUFF + 512*240/2;
 268         unsigned char  *src = (unsigned char  *)VRAM_CACHED_STUFF + 16;
 269         if (!(Pico.video.reg[1]&8)) { line = 8; dst += 512*8; src += 512*8; }
 270
 271         for (; line < line_to; line++, dst+=512, src+=512)
 272                 amips_clut(dst, src, localPal, line_len);
 273 }
 274
 275 static void EmuScanPrepare(void)
 276 {
 277         HighCol = (unsigned char *)VRAM_CACHED_STUFF + 8;
 278         if (!(Pico.video.reg[1]&8)) HighCol += 8*512;
 279
 280         dynamic_palette = 0;
 281         if (Pico.m.dirtyPal)
 282                 do_pal_update(1);
 283 }
 284
 285 static int EmuScanSlow(unsigned int num, void *sdata)
 286 {
 287         if (!(Pico.video.reg[1]&8)) num += 8;
 288
 289         if (Pico.m.dirtyPal) {
 290                 if (!dynamic_palette) {
 291                         do_slowmode_lines(num);
 292                         dynamic_palette = 1;
 293                 }
 294                 do_pal_update(1);
 295         }
 296
 297         if (dynamic_palette) {
 298                 int line_len = (Pico.video.reg[12]&1) ? 320 : 256;
 299                 void *dst = (char *)VRAM_STUFF + 512*240 + 512*2*num;
 300                 amips_clut(dst, HighCol + 8, localPal, line_len);
 301         } else
 302                 HighCol = (unsigned char *)VRAM_CACHED_STUFF + (num+1)*512 + 8;
 303
 304         return 0;
 305 }
 306
 307 static void blitscreen_clut(void)
 308 {
 309         int offs = fbimg_offs;
 310         offs += (psp_screen == VRAM_FB0) ? VRAMOFFS_FB0 : VRAMOFFS_FB1;
 311
 312         sceGuSync(0,0); // sync with prev
 313         sceGuStart(GU_DIRECT, guCmdList);
 314         sceGuDrawBuffer(GU_PSM_5650, (void *)offs, 512); // point to back buffer
 315
 316         if (dynamic_palette)
 317         {
 318                 if (!blit_16bit_mode) {
 319                         sceGuTexMode(GU_PSM_5650, 0, 0, 0);
 320                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 512*240);
 321
 322                         blit_16bit_mode = 1;
 323                 }
 324         }
 325         else
 326         {
 327                 if (blit_16bit_mode) {
 328                         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 329                         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 330                         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 331                         blit_16bit_mode = 0;
 332                 }
 333
 334                 if ((PicoOpt&0x10) && Pico.m.dirtyPal)
 335                         do_pal_update(0);
 336
 337                 sceKernelDcacheWritebackAll();
 338
 339                 if (need_pal_upload) {
 340                         need_pal_upload = 0;
 341                         sceGuClutLoad((256/8), localPal); // upload 32*8 entries (256)
 342                 }
 343         }
 344
 345 #if 1
 346         if (g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x)
 347         {
 348                 struct Vertex* vertices;
 349                 int x;
 350
 351                 #define SLICE_WIDTH 32
 352                 for (x = 0; x < g_vertices[1].x; x += SLICE_WIDTH)
 353                 {
 354                         // render sprite
 355                         vertices = (struct Vertex*)sceGuGetMemory(2 * sizeof(struct Vertex));
 356                         memcpy(vertices, g_vertices, 2 * sizeof(struct Vertex));
 357                         vertices[0].u = vertices[0].x = x;
 358                         vertices[1].u = vertices[1].x = x + SLICE_WIDTH;
 359                         sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,vertices);
 360                 }
 361                 // lprintf("listlen: %iB\n", sceGuCheckList()); // ~480 only
 362         }
 363         else
 364 #endif
 365                 sceGuDrawArray(GU_SPRITES,GU_TEXTURE_16BIT|GU_VERTEX_16BIT|GU_TRANSFORM_2D,2,0,g_vertices);
 366
 367         sceGuFinish();
 368 }
 369
 370
 371 static void cd_leds(void)
 372 {
 373         unsigned int reg, col_g, col_r, *p;
 374
 375         reg = Pico_mcd->s68k_regs[0];
 376
 377         p = (unsigned int *)((short *)psp_screen + 512*2+4+2);
 378         col_g = (reg & 2) ? 0x06000600 : 0;
 379         col_r = (reg & 1) ? 0x00180018 : 0;
 380         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 381         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 512/2 - 12/2;
 382         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 383 }
 384
 385 #if 0
 386 static void dbg_text(void)
 387 {
 388         int *p, h, len;
 389         char text[128];
 390
 391         sprintf(text, "sl: %i, 16b: %i", g_vertices[0].u == 0 && g_vertices[1].u == g_vertices[1].x, blit_16bit_mode);
 392         len = strlen(text) * 8 / 2;
 393         for (h = 0; h < 8; h++) {
 394                 p = (int *) ((unsigned short *) psp_screen+2+512*(256+h));
 395                 p = (int *) ((int)p & ~3); // align
 396                 memset32_uncached(p, 0, len);
 397         }
 398         emu_textOut16(2, 256, text);
 399 }
 400 #endif
 401
 402 /* called after rendering is done, but frame emulation is not finished */
 403 void blit1(void)
 404 {
 405         if (PicoOpt&0x10)
 406         {
 407                 int i;
 408                 unsigned char *pd;
 409                 // clear top and bottom trash
 410                 for (pd = PicoDraw2FB+8, i = 8; i > 0; i--, pd += 512)
 411                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 412                 for (pd = PicoDraw2FB+512*232+8, i = 8; i > 0; i--, pd += 512)
 413                         memset32((int *)pd, 0xe0e0e0e0, 320/4);
 414         }
 415
 416         blitscreen_clut();
 417 }
 418
 419
 420 static void blit2(const char *fps, const char *notice, int lagging_behind)
 421 {
 422         int vsync = 0, emu_opt = currentConfig.EmuOpt;
 423
 424         if (notice || (emu_opt & 2)) {
 425                 if (notice)      osd_text(4, notice, 0, 0);
 426                 if (emu_opt & 2) osd_text(OSD_FPS_X, fps, 0, 0);
 427         }
 428
 429         //dbg_text();
 430
 431         if ((emu_opt & 0x400) && (PicoMCD & 1))
 432                 cd_leds();
 433
 434         if (currentConfig.EmuOpt & 0x2000) { // want vsync
 435                 if (!(currentConfig.EmuOpt & 0x10000) || !lagging_behind) vsync = 1;
 436         }
 437
 438         psp_video_flip(vsync);
 439 }
 440
 441 // clears whole screen or just the notice area (in all buffers)
 442 static void clearArea(int full)
 443 {
 444         if (full) {
 445                 memset32_uncached(psp_screen, 0, 512*272*2/4);
 446                 psp_video_flip(0);
 447                 memset32_uncached(psp_screen, 0, 512*272*2/4);
 448                 memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*240/4);
 449                 memset32((int *)VRAM_CACHED_STUFF+512*240/4, 0, 512*240*2/4);
 450         } else {
 451                 void *fb = psp_video_get_active_fb();
 452                 memset32_uncached((int *)((char *)psp_screen + 512*264*2), 0, 512*8*2/4);
 453                 memset32_uncached((int *)((char *)fb         + 512*264*2), 0, 512*8*2/4);
 454         }
 455 }
 456
 457 static void vidResetMode(void)
 458 {
 459         // setup GU
 460         sceGuSync(0,0); // sync with prev
 461         sceGuStart(GU_DIRECT, guCmdList);
 462
 463         sceGuClutMode(GU_PSM_5650,0,0xff,0);
 464         sceGuTexMode(GU_PSM_T8,0,0,0); // 8-bit image
 465         sceGuTexFunc(GU_TFX_REPLACE,GU_TCC_RGB);
 466         if (currentConfig.scaling)
 467              sceGuTexFilter(GU_LINEAR, GU_LINEAR);
 468         else sceGuTexFilter(GU_NEAREST, GU_NEAREST);
 469         sceGuTexScale(1.0f,1.0f);
 470         sceGuTexOffset(0.0f,0.0f);
 471
 472         sceGuTexImage(0,512,512,512,(char *)VRAM_STUFF + 16);
 473
 474         // slow rend.
 475         PicoDrawSetColorFormat(-1);
 476         PicoScan = EmuScanSlow;
 477
 478         localPal[0xe0] = 0;
 479         Pico.m.dirtyPal = 1;
 480         blit_16bit_mode = dynamic_palette = 0;
 481
 482         sceGuFinish();
 483         set_scaling_params();
 484         sceGuSync(0,0);
 485 }
 486
 487
 488 /* sound stuff */
 489 #define SOUND_BLOCK_SIZE_NTSC (1470*2) // 1024 // 1152
 490 #define SOUND_BLOCK_SIZE_PAL  (1764*2)
 491 #define SOUND_BLOCK_COUNT    8
 492
 493 static short __attribute__((aligned(4))) sndBuffer[SOUND_BLOCK_SIZE_PAL*SOUND_BLOCK_COUNT + 44100/50*2];
 494 static short *snd_playptr = NULL, *sndBuffer_endptr = NULL;
 495 static int samples_made = 0, samples_done = 0, samples_block = 0;
 496 static int sound_thread_exit = 0;
 497 static SceUID sound_sem = -1;
 498
 499 static void writeSound(int len);
 500
 501 static int sound_thread(SceSize args, void *argp)
 502 {
 503         int ret = 0;
 504
 505         lprintf("sthr: started, priority %i\n", sceKernelGetThreadCurrentPriority());
 506
 507         while (!sound_thread_exit)
 508         {
 509                 if (samples_made - samples_done < samples_block) {
 510                         // wait for data (use at least 2 blocks)
 511                         lprintf("sthr: wait... (%i)\n", samples_made - samples_done);
 512                         while (samples_made - samples_done <= samples_block*2 && !sound_thread_exit)
 513                                 ret = sceKernelWaitSema(sound_sem, 1, 0);
 514                         if (ret < 0) lprintf("sthr: sceKernelWaitSema: %i\n", ret);
 515                         continue;
 516                 }
 517
 518                 // lprintf("sthr: got data: %i\n", samples_made - samples_done);
 519
 520                 ret = sceAudio_E0727056(PSP_AUDIO_VOLUME_MAX, snd_playptr);
 521
 522                 samples_done += samples_block;
 523                 snd_playptr  += samples_block;
 524                 if (snd_playptr >= sndBuffer_endptr)
 525                         snd_playptr = sndBuffer;
 526                 if (ret)
 527                         lprintf("sthr: outf: %i; pos %i/%i\n", ret, samples_done, samples_made);
 528
 529                 // shouln't happen, but just in case
 530                 if (samples_made - samples_done >= samples_block*3) {
 531                         lprintf("sthr: block skip (%i)\n", samples_made - samples_done);
 532                         samples_done += samples_block; // skip
 533                         snd_playptr  += samples_block;
 534                 }
 535
 536         }
 537
 538         lprintf("sthr: exit\n");
 539         sceKernelExitDeleteThread(0);
 540         return 0;
 541 }
 542
 543 static void sound_init(void)
 544 {
 545         SceUID thid;
 546
 547         sound_sem = sceKernelCreateSema("sndsem", 0, 0, 1, NULL);
 548         if (sound_sem < 0) lprintf("sceKernelCreateSema() failed: %i\n", sound_sem);
 549
 550         samples_made = samples_done = 0;
 551         samples_block = SOUND_BLOCK_SIZE_NTSC; // make sure it goes to sema
 552         sound_thread_exit = 0;
 553         thid = sceKernelCreateThread("sndthread", sound_thread, 0x12, 0x10000, 0, NULL);
 554         if (thid >= 0)
 555         {
 556                 sceKernelStartThread(thid, 0, 0);
 557         }
 558         else
 559                 lprintf("sceKernelCreateThread failed: %i\n", thid);
 560 }
 561
 562 static void sound_prepare(void)
 563 {
 564         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 565         int ret, stereo;
 566
 567         samples_made = samples_done = 0;
 568
 569         if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 570                 PsndRerate(Pico.m.frame_count ? 1 : 0);
 571         }
 572         stereo=(PicoOpt&8)>>3;
 573
 574         samples_block = Pico.m.pal ? SOUND_BLOCK_SIZE_PAL : SOUND_BLOCK_SIZE_NTSC;
 575         if (PsndRate <= 22050) samples_block /= 2;
 576         sndBuffer_endptr = &sndBuffer[samples_block*SOUND_BLOCK_COUNT];
 577
 578         lprintf("starting audio: %i, len: %i, stereo: %i, pal: %i, block samples: %i\n",
 579                         PsndRate, PsndLen, stereo, Pico.m.pal, samples_block);
 580
 581         // while (sceAudioOutput2GetRestSample() > 0) psp_msleep(100);
 582         // sceAudio_5C37C0AE();
 583         ret = sceAudio_38553111(samples_block/2, PsndRate, 2); // seems to not need that stupid 64byte alignment
 584         if (ret < 0) {
 585                 lprintf("sceAudio_38553111() failed: %i\n", ret);
 586                 sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 587                 noticeMsgTime = sceKernelGetSystemTimeLow();
 588                 currentConfig.EmuOpt &= ~4;
 589         } else {
 590                 PicoWriteSound = writeSound;
 591                 memset32((int *)(void *)sndBuffer, 0, sizeof(sndBuffer)/4);
 592                 snd_playptr = sndBuffer_endptr - samples_block;
 593                 samples_made = samples_block; // send 1 empty block first..
 594                 PsndOut = sndBuffer;
 595                 PsndRate_old = PsndRate;
 596                 PicoOpt_old  = PicoOpt;
 597                 pal_old = Pico.m.pal;
 598         }
 599 }
 600
 601 static void sound_end(void)
 602 {
 603         int i;
 604         if (samples_done == 0)
 605         {
 606                 // if no data is written between sceAudio_38553111 and sceAudio_5C37C0AE calls,
 607                 // we get a deadlock on next sceAudio_38553111 call
 608                 // so this is yet another workaround:
 609                 memset32((int *)(void *)sndBuffer, 0, samples_block*4/4);
 610                 samples_made = samples_block * 3;
 611                 sceKernelSignalSema(sound_sem, 1);
 612         }
 613         sceKernelDelayThread(100*1000);
 614         samples_made = samples_done = 0;
 615         for (i = 0; sceAudioOutput2GetRestSample() > 0 && i < 16; i++)
 616                 psp_msleep(100);
 617         sceAudio_5C37C0AE();
 618 }
 619
 620 static void sound_deinit(void)
 621 {
 622         sound_thread_exit = 1;
 623         sceKernelSignalSema(sound_sem, 1);
 624         sceKernelDeleteSema(sound_sem);
 625         sound_sem = -1;
 626 }
 627
 628 static void writeSound(int len)
 629 {
 630         int ret;
 631         if (PicoOpt&8) len<<=1;
 632
 633         PsndOut += len;
 634         /*if (PsndOut > sndBuffer_endptr) {
 635                 memcpy32((int *)(void *)sndBuffer, (int *)endptr, (PsndOut - endptr + 1) / 2);
 636                 PsndOut = &sndBuffer[PsndOut - endptr];
 637                 lprintf("mov\n");
 638         }
 639         else*/
 640         if (PsndOut > sndBuffer_endptr) lprintf("snd oflow %i!\n", PsndOut - sndBuffer_endptr);
 641         if (PsndOut >= sndBuffer_endptr)
 642                 PsndOut = sndBuffer;
 643
 644         // signal the snd thread
 645         samples_made += len;
 646         if (samples_made - samples_done > samples_block*2) {
 647                 // lprintf("signal, %i/%i\n", samples_done, samples_made);
 648                 ret = sceKernelSignalSema(sound_sem, 1);
 649                 //if (ret < 0) lprintf("snd signal ret %08x\n", ret);
 650         }
 651 }
 652
 653
 654 static void SkipFrame(void)
 655 {
 656         PicoSkipFrame=1;
 657         PicoFrame();
 658         PicoSkipFrame=0;
 659 }
 660
 661 void emu_forcedFrame(void)
 662 {
 663         int po_old = PicoOpt;
 664         int eo_old = currentConfig.EmuOpt;
 665
 666         PicoOpt &= ~0x0010;
 667         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 668         currentConfig.EmuOpt |= 0x80;
 669
 670         vidResetMode();
 671         memset32(VRAM_CACHED_STUFF, 0xe0e0e0e0, 512*8/4); // borders
 672         memset32((int *)VRAM_CACHED_STUFF + 512*232/4, 0xe0e0e0e0, 512*8/4);
 673         memset32_uncached((int *)psp_screen + 512*264*2/4, 0, 512*8*2/4);
 674
 675         PicoDrawSetColorFormat(-1);
 676         PicoScan = EmuScanSlow;
 677         EmuScanPrepare();
 678         PicoFrameDrawOnly();
 679         blit1();
 680         sceGuSync(0,0);
 681
 682         PicoOpt = po_old;
 683         currentConfig.EmuOpt = eo_old;
 684 }
 685
 686
 687 static void RunEvents(unsigned int which)
 688 {
 689         if (which & 0x1800) // save or load (but not both)
 690         {
 691                 int do_it = 1;
 692
 693                 if ( emu_checkSaveFile(state_slot) &&
 694                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 695                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 696                 {
 697                         int keys;
 698                         sceGuSync(0,0);
 699                         blit2("", (which & 0x1000) ? "LOAD STATE? (X=yes, O=no)" : "OVERWRITE SAVE? (X=yes, O=no)", 0);
 700                         while( !((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) )
 701                                 psp_msleep(50);
 702                         if (keys & BTN_CIRCLE) do_it = 0;
 703                         while(  ((keys = psp_pad_read(1)) & (BTN_X|BTN_CIRCLE)) ) // wait for release
 704                                 psp_msleep(50);
 705                         clearArea(0);
 706                 }
 707
 708                 if (do_it)
 709                 {
 710                         osd_text(4, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME", 1, 0);
 711                         PicoStateProgressCB = emu_msg_cb;
 712                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 713                         PicoStateProgressCB = NULL;
 714                         psp_msleep(0);
 715                 }
 716
 717                 reset_timing = 1;
 718         }
 719         if (which & 0x0400) // switch renderer
 720         {
 721                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 722                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 723
 724                 vidResetMode();
 725
 726                 if (PicoOpt&0x10)
 727                         strcpy(noticeMsg, "fast renderer");
 728                 else if (currentConfig.EmuOpt&0x80)
 729                         strcpy(noticeMsg, "accurate renderer");
 730
 731                 noticeMsgTime = sceKernelGetSystemTimeLow();
 732         }
 733         if (which & 0x0300)
 734         {
 735                 if(which&0x0200) {
 736                         state_slot -= 1;
 737                         if(state_slot < 0) state_slot = 9;
 738                 } else {
 739                         state_slot += 1;
 740                         if(state_slot > 9) state_slot = 0;
 741                 }
 742                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 743                 noticeMsgTime = sceKernelGetSystemTimeLow();
 744         }
 745 }
 746
 747 static void updateKeys(void)
 748 {
 749         unsigned int keys, allActions[2] = { 0, 0 }, events;
 750         static unsigned int prevEvents = 0;
 751         int i;
 752
 753         keys = psp_pad_read(0);
 754         if (keys & PSP_CTRL_HOME)
 755                 sceDisplayWaitVblankStart();
 756
 757         if (keys & BTN_SELECT)
 758                 engineState = PGS_Menu;
 759
 760         keys &= CONFIGURABLE_KEYS;
 761
 762         for (i = 0; i < 32; i++)
 763         {
 764                 if (keys & (1 << i))
 765                 {
 766                         int pl, acts = currentConfig.KeyBinds[i];
 767                         if (!acts) continue;
 768                         pl = (acts >> 16) & 1;
 769                         if (combo_keys & (1 << i))
 770                         {
 771                                 int u = i+1, acts_c = acts & combo_acts;
 772                                 // let's try to find the other one
 773                                 if (acts_c)
 774                                         for (; u < 32; u++)
 775                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 776                                                         allActions[pl] |= acts_c;
 777                                                         keys &= ~((1 << i) | (1 << u));
 778                                                         break;
 779                                                 }
 780                                 // add non-combo actions if combo ones were not found
 781                                 if (!acts_c || u == 32)
 782                                         allActions[pl] |= acts & ~combo_acts;
 783                         } else {
 784                                 allActions[pl] |= acts;
 785                         }
 786                 }
 787         }
 788
 789         PicoPad[0] = (unsigned short) allActions[0];
 790         PicoPad[1] = (unsigned short) allActions[1];
 791
 792         events = (allActions[0] | allActions[1]) >> 16;
 793
 794         // volume is treated in special way and triggered every frame
 795         if ((events & 0x6000) && PsndOut != NULL)
 796         {
 797                 int vol = currentConfig.volume;
 798                 if (events & 0x2000) {
 799                         if (vol < 100) vol++;
 800                 } else {
 801                         if (vol >   0) vol--;
 802                 }
 803                 // FrameworkAudio_SetVolume(vol, vol); // TODO
 804                 sprintf(noticeMsg, "VOL: %02i ", vol);
 805                 noticeMsgTime = sceKernelGetSystemTimeLow();
 806                 currentConfig.volume = vol;
 807         }
 808
 809         events &= ~prevEvents;
 810         if (events) RunEvents(events);
 811         if (movie_data) emu_updateMovie();
 812
 813         prevEvents = (allActions[0] | allActions[1]) >> 16;
 814 }
 815
 816 static void find_combos(void)
 817 {
 818         int act, u;
 819
 820         // find out which keys and actions are combos
 821         combo_keys = combo_acts = 0;
 822         for (act = 0; act < 32; act++)
 823         {
 824                 int keyc = 0, keyc2 = 0;
 825                 if (act == 16 || act == 17) continue; // player2 flag
 826                 if (act > 17)
 827                 {
 828                         for (u = 0; u < 28; u++) // 28 because nub can't produce combos
 829                                 if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
 830                 }
 831                 else
 832                 {
 833                         for (u = 0; u < 28; u++)
 834                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 0 && // pl. 1
 835                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc++;
 836                         for (u = 0; u < 28; u++)
 837                                 if ((currentConfig.KeyBinds[u] & 0x30000) == 1 && // pl. 2
 838                                         (currentConfig.KeyBinds[u] & (1 << act))) keyc2++;
 839                 }
 840                 if (keyc > 1 || keyc2 > 1)
 841                 {
 842                         // loop again and mark those keys and actions as combo
 843                         for (u = 0; u < 28; u++)
 844                         {
 845                                 if (currentConfig.KeyBinds[u] & (1 << act)) {
 846                                         combo_keys |= 1 << u;
 847                                         combo_acts |= 1 << act;
 848                                 }
 849                         }
 850                 }
 851         }
 852 }
 853
 854
 855 static void simpleWait(unsigned int until)
 856 {
 857         unsigned int tval;
 858         int diff;
 859
 860         tval = sceKernelGetSystemTimeLow();
 861         diff = (int)until - (int)tval;
 862         if (diff >= 512 && diff < 100*1024)
 863                 sceKernelDelayThread(diff);
 864 }
 865
 866 void emu_Loop(void)
 867 {
 868         char fpsbuff[24]; // fps count c string
 869         unsigned int tval, tval_prev = 0, tval_thissec = 0; // timing
 870         int frames_done = 0, frames_shown = 0, oldmodes = 0;
 871         int target_fps, target_frametime, lim_time, tval_diff, i;
 872         char *notice = NULL;
 873
 874         lprintf("entered emu_Loop()\n");
 875
 876         fpsbuff[0] = 0;
 877
 878         if (currentConfig.CPUclock != psp_get_cpu_clock()) {
 879                 lprintf("setting cpu clock to %iMHz... ", currentConfig.CPUclock);
 880                 i = psp_set_cpu_clock(currentConfig.CPUclock);
 881                 lprintf(i ? "failed\n" : "done\n");
 882                 currentConfig.CPUclock = psp_get_cpu_clock();
 883         }
 884
 885         // make sure we are in correct mode
 886         vidResetMode();
 887         clearArea(1);
 888         Pico.m.dirtyPal = 1;
 889         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 890         find_combos();
 891
 892         // pal/ntsc might have changed, reset related stuff
 893         target_fps = Pico.m.pal ? 50 : 60;
 894         target_frametime = Pico.m.pal ? (1000000<<8)/50 : (1000000<<8)/60+1;
 895         reset_timing = 1;
 896
 897         // prepare CD buffer
 898         if (PicoMCD & 1) PicoCDBufferInit();
 899
 900         // prepare sound stuff
 901         PsndOut = NULL;
 902         if (currentConfig.EmuOpt & 4)
 903         {
 904                 sound_prepare();
 905         }
 906
 907         sceDisplayWaitVblankStart();
 908
 909         // loop?
 910         while (engineState == PGS_Running)
 911         {
 912                 int modes;
 913
 914                 tval = sceKernelGetSystemTimeLow();
 915                 if (reset_timing || tval < tval_prev) {
 916                         //stdbg("timing reset");
 917                         reset_timing = 0;
 918                         tval_thissec = tval;
 919                         frames_shown = frames_done = 0;
 920                 }
 921
 922                 // show notice message?
 923                 if (noticeMsgTime) {
 924                         static int noticeMsgSum;
 925                         if (tval - noticeMsgTime > 2000000) { // > 2.0 sec
 926                                 noticeMsgTime = 0;
 927                                 clearArea(0);
 928                                 notice = 0;
 929                         } else {
 930                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 931                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 932                                 notice = noticeMsg;
 933                         }
 934                 }
 935
 936                 // check for mode changes
 937                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 938                 if (modes != oldmodes) {
 939                         oldmodes = modes;
 940                         clearArea(1);
 941                         set_scaling_params();
 942                 }
 943
 944                 // second passed?
 945                 if (tval - tval_thissec >= 1000000)
 946                 {
 947                         // missing 1 frame?
 948                         if (currentConfig.Frameskip < 0 && frames_done < target_fps) {
 949                                 SkipFrame(); frames_done++;
 950                         }
 951
 952                         if (currentConfig.EmuOpt & 2)
 953                                 sprintf(fpsbuff, "%02i/%02i  ", frames_shown, frames_done);
 954
 955                         tval_thissec += 1000000;
 956
 957                         if (currentConfig.Frameskip < 0) {
 958                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 959                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 960                                 if (frames_shown > frames_done) frames_shown = frames_done;
 961                         } else {
 962                                 frames_done = frames_shown = 0;
 963                         }
 964                 }
 965 #ifdef PFRAMES
 966                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 967 #endif
 968
 969                 tval_prev = tval;
 970                 lim_time = (frames_done+1) * target_frametime;
 971                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 972                 {
 973                         for (i = 0; i < currentConfig.Frameskip; i++) {
 974                                 updateKeys();
 975                                 SkipFrame(); frames_done++;
 976                                 if (PsndOut) { // do framelimitting if sound is enabled
 977                                         int tval_diff;
 978                                         tval = sceKernelGetSystemTimeLow();
 979                                         tval_diff = (int)(tval - tval_thissec) << 8;
 980                                         if (tval_diff < lim_time) // we are too fast
 981                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 982                                 }
 983                                 lim_time += target_frametime;
 984                         }
 985                 }
 986                 else // auto frameskip
 987                 {
 988                         int tval_diff;
 989                         tval = sceKernelGetSystemTimeLow();
 990                         tval_diff = (int)(tval - tval_thissec) << 8;
 991                         if (tval_diff > lim_time && (frames_done/16 < frames_shown))
 992                         {
 993                                 // no time left for this frame - skip
 994                                 if (tval_diff - lim_time >= (300000<<8)) {
 995                                         reset_timing = 1;
 996                                         continue;
 997                                 }
 998                                 updateKeys();
 999                                 SkipFrame(); frames_done++;
1000                                 continue;
1001                         }
1002                 }
1003
1004                 updateKeys();
1005
1006                 if (!(PicoOpt&0x10))
1007                         EmuScanPrepare();
1008
1009                 PicoFrame();
1010
1011                 sceGuSync(0,0);
1012
1013                 // check time
1014                 tval = sceKernelGetSystemTimeLow();
1015                 tval_diff = (int)(tval - tval_thissec) << 8;
1016
1017                 blit2(fpsbuff, notice, tval_diff > lim_time);
1018
1019                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300000<<8)) // slowdown detection
1020                         reset_timing = 1;
1021                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
1022                 {
1023                         // sleep if we are still too fast
1024                         if (tval_diff < lim_time)
1025                         {
1026                                 // we are too fast
1027                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
1028                         }
1029                 }
1030
1031                 frames_done++; frames_shown++;
1032         }
1033
1034
1035         if (PicoMCD & 1) PicoCDBufferFree();
1036
1037         if (PsndOut != NULL) {
1038                 PsndOut = NULL;
1039                 sound_end();
1040         }
1041
1042         // save SRAM
1043         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
1044                 emu_msg_cb("Writing SRAM/BRAM..");
1045                 emu_SaveLoadGame(0, 1);
1046                 SRam.changed = 0;
1047         }
1048
1049         // clear fps counters and stuff
1050         memset32_uncached((int *)psp_video_get_active_fb() + 512*264*2/4, 0, 512*8*2/4);
1051 }
1052
1053
1054 void emu_ResetGame(void)
1055 {
1056         PicoReset(0);
1057         reset_timing = 1;
1058 }
1059