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