1 /*
2 * PicoDrive
3 * (C) notaz, 2007-2010
4 *
5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
7 */
8
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <stdarg.h>
13 #ifdef __GP2X__
14 #include <unistd.h>
15 #endif
16
17 #include "../libpicofe/posix.h"
18 #include "../libpicofe/input.h"
19 #include "../libpicofe/fonts.h"
20 #include "../libpicofe/sndout.h"
21 #include "../libpicofe/lprintf.h"
22 #include "../libpicofe/plat.h"
23 #include "emu.h"
24 #include "input_pico.h"
25 #include "menu_pico.h"
26 #include "config_file.h"
27
28 #include <pico/pico_int.h>
29 #include <pico/patch.h>
30
31 #ifdef USE_LIBRETRO_VFS
32 #include "file_stream_transforms.h"
33 #endif
34
35 #ifndef _WIN32
36 #define PATH_SEP "/"
37 #define PATH_SEP_C '/'
38 #else
39 #define PATH_SEP "\\"
40 #define PATH_SEP_C '\\'
41 #endif
42
43 #define STATUS_MSG_TIMEOUT 2000
44
45 void *g_screen_ptr;
46
47 int g_screen_width = 320;
48 int g_screen_height = 240;
49 int g_screen_ppitch = 320; // pitch in pixels
50
51 const char *PicoConfigFile = "config2.cfg";
52 currentConfig_t currentConfig, defaultConfig;
53 int state_slot = 0;
54 int config_slot = 0, config_slot_current = 0;
55 int pico_pen_x = 320/2, pico_pen_y = 240/2;
56 int pico_inp_mode;
57 int flip_after_sync;
58 int engineState = PGS_Menu;
59
60 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
61
62 /* tmp buff to reduce stack usage for plats with small stack */
63 static char static_buff[512];
64 const char *rom_fname_reload;
65 char rom_fname_loaded[512];
66 int reset_timing = 0;
67 static unsigned int notice_msg_time; /* when started showing */
68 static char noticeMsg[40];
69
70 unsigned char *movie_data = NULL;
71 static int movie_size = 0;
72
73
74 /* don't use tolower() for easy old glibc binary compatibility */
strlwr_(char * string)75 static void strlwr_(char *string)
76 {
77 char *p;
78 for (p = string; *p; p++)
79 if ('A' <= *p && *p <= 'Z')
80 *p += 'a' - 'A';
81 }
82
try_rfn_cut(char * fname)83 static int try_rfn_cut(char *fname)
84 {
85 FILE *tmp;
86 char *p;
87
88 p = fname + strlen(fname) - 1;
89 for (; p > fname; p--)
90 if (*p == '.') break;
91 *p = 0;
92
93 if((tmp = fopen(fname, "rb"))) {
94 fclose(tmp);
95 return 1;
96 }
97 return 0;
98 }
99
get_ext(const char * file,char * ext)100 static void get_ext(const char *file, char *ext)
101 {
102 const char *p;
103
104 p = file + strlen(file) - 4;
105 if (p < file) p = file;
106 strncpy(ext, p, 4);
107 ext[4] = 0;
108 strlwr_(ext);
109 }
110
fname_ext(char * dst,int dstlen,const char * prefix,const char * ext,const char * fname)111 static void fname_ext(char *dst, int dstlen, const char *prefix, const char *ext, const char *fname)
112 {
113 int prefix_len = 0;
114 const char *p;
115
116 *dst = 0;
117 if (prefix) {
118 int len = plat_get_root_dir(dst, dstlen);
119 strcpy(dst + len, prefix);
120 prefix_len = len + strlen(prefix);
121 }
122
123 p = fname + strlen(fname) - 1;
124 for (; p >= fname && *p != PATH_SEP_C; p--)
125 ;
126 p++;
127 strncpy(dst + prefix_len, p, dstlen - prefix_len - 1);
128
129 dst[dstlen - 8] = 0;
130 if (dst[strlen(dst) - 4] == '.')
131 dst[strlen(dst) - 4] = 0;
132 if (ext)
133 strcat(dst, ext);
134 }
135
romfname_ext(char * dst,int dstlen,const char * prefix,const char * ext)136 static void romfname_ext(char *dst, int dstlen, const char *prefix, const char *ext)
137 {
138 fname_ext(dst, dstlen, prefix, ext, rom_fname_loaded);
139 }
140
emu_status_msg(const char * format,...)141 void emu_status_msg(const char *format, ...)
142 {
143 va_list vl;
144 int ret;
145
146 va_start(vl, format);
147 ret = vsnprintf(noticeMsg, sizeof(noticeMsg), format, vl);
148 va_end(vl);
149
150 /* be sure old text gets overwritten */
151 for (; ret < 28; ret++)
152 noticeMsg[ret] = ' ';
153 noticeMsg[ret] = 0;
154
155 notice_msg_time = plat_get_ticks_ms();
156 }
157
158 static const char * const biosfiles_us[] = {
159 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
160 };
161 static const char * const biosfiles_eu[] = {
162 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
163 };
164 static const char * const biosfiles_jp[] = {
165 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
166 };
167
find_bios(int * region,const char * cd_fname)168 static const char *find_bios(int *region, const char *cd_fname)
169 {
170 int i, count;
171 const char * const *files;
172 FILE *f = NULL;
173 int ret;
174
175 // we need to have config loaded at this point
176 ret = emu_read_config(cd_fname, 0);
177 if (!ret) emu_read_config(NULL, 0);
178
179 if (PicoIn.regionOverride) {
180 *region = PicoIn.regionOverride;
181 lprintf("override region to %s\n", *region != 4 ?
182 (*region == 8 ? "EU" : "JAP") : "USA");
183 }
184
185 if (*region == 4) { // US
186 files = biosfiles_us;
187 count = sizeof(biosfiles_us) / sizeof(char *);
188 } else if (*region == 8) { // EU
189 files = biosfiles_eu;
190 count = sizeof(biosfiles_eu) / sizeof(char *);
191 } else if (*region == 1 || *region == 2) {
192 files = biosfiles_jp;
193 count = sizeof(biosfiles_jp) / sizeof(char *);
194 } else {
195 return 0;
196 }
197
198 for (i = 0; i < count; i++)
199 {
200 emu_make_path(static_buff, files[i], sizeof(static_buff) - 4);
201 strcat(static_buff, ".bin");
202 f = fopen(static_buff, "rb");
203 if (f) break;
204
205 static_buff[strlen(static_buff) - 4] = 0;
206 strcat(static_buff, ".zip");
207 f = fopen(static_buff, "rb");
208 if (f) break;
209 }
210
211 if (f) {
212 lprintf("using bios: %s\n", static_buff);
213 fclose(f);
214 return static_buff;
215 } else {
216 sprintf(static_buff, "no %s BIOS files found, read docs",
217 *region != 4 ? (*region == 8 ? "EU" : "JAP") : "USA");
218 menu_update_msg(static_buff);
219 return NULL;
220 }
221 }
222
223 /* check if the name begins with BIOS name */
224 /*
225 static int emu_isBios(const char *name)
226 {
227 int i;
228 for (i = 0; i < sizeof(biosfiles_us)/sizeof(biosfiles_us[0]); i++)
229 if (strstr(name, biosfiles_us[i]) != NULL) return 1;
230 for (i = 0; i < sizeof(biosfiles_eu)/sizeof(biosfiles_eu[0]); i++)
231 if (strstr(name, biosfiles_eu[i]) != NULL) return 1;
232 for (i = 0; i < sizeof(biosfiles_jp)/sizeof(biosfiles_jp[0]); i++)
233 if (strstr(name, biosfiles_jp[i]) != NULL) return 1;
234 return 0;
235 }
236 */
237
extract_text(char * dest,const unsigned char * src,int len,int swab)238 static int extract_text(char *dest, const unsigned char *src, int len, int swab)
239 {
240 char *p = dest;
241 int i;
242
243 if (swab) swab = 1;
244
245 for (i = len - 1; i >= 0; i--)
246 {
247 if (src[i^swab] != ' ') break;
248 }
249 len = i + 1;
250
251 for (i = 0; i < len; i++)
252 {
253 unsigned char s = src[i^swab];
254 if (s >= 0x20 && s < 0x7f && s != '#' && s != '|' &&
255 s != '[' && s != ']' && s != '\\')
256 {
257 *p++ = s;
258 }
259 else
260 {
261 sprintf(p, "\\%02x", s);
262 p += 3;
263 }
264 }
265
266 return p - dest;
267 }
268
emu_make_rom_id(const char * fname)269 static char *emu_make_rom_id(const char *fname)
270 {
271 static char id_string[3+0xe*3+0x3*3+0x30*3+3];
272 int pos, swab = 1;
273
274 if (PicoIn.AHW & PAHW_MCD) {
275 strcpy(id_string, "CD|");
276 swab = 0;
277 }
278 else if (PicoIn.AHW & PAHW_SMS)
279 strcpy(id_string, "MS|");
280 else strcpy(id_string, "MD|");
281 pos = 3;
282
283 if (!(PicoIn.AHW & PAHW_SMS)) {
284 pos += extract_text(id_string + pos, media_id_header + 0x80, 0x0e, swab); // serial
285 id_string[pos] = '|'; pos++;
286 pos += extract_text(id_string + pos, media_id_header + 0xf0, 0x03, swab); // region
287 id_string[pos] = '|'; pos++;
288 pos += extract_text(id_string + pos, media_id_header + 0x50, 0x30, swab); // overseas name
289 id_string[pos] = 0;
290 if (pos > 5)
291 return id_string;
292 pos = 3;
293 }
294
295 // can't find name in ROM, use filename
296 fname_ext(id_string + 3, sizeof(id_string) - 3, NULL, NULL, fname);
297
298 return id_string;
299 }
300
301 // buffer must be at least 150 byte long
emu_get_game_name(char * str150)302 void emu_get_game_name(char *str150)
303 {
304 int ret, swab = (PicoIn.AHW & PAHW_MCD) ? 0 : 1;
305 char *s, *d;
306
307 ret = extract_text(str150, media_id_header + 0x50, 0x30, swab); // overseas name
308
309 for (s = d = str150 + 1; s < str150+ret; s++)
310 {
311 if (*s == 0) break;
312 if (*s != ' ' || d[-1] != ' ')
313 *d++ = *s;
314 }
315 *d = 0;
316 }
317
system_announce(void)318 static void system_announce(void)
319 {
320 const char *sys_name, *tv_standard, *extra = "";
321 int fps;
322
323 if (PicoIn.AHW & PAHW_SMS) {
324 sys_name = "Master System";
325 #ifdef NO_SMS
326 extra = " [no support]";
327 #endif
328 } else if (PicoIn.AHW & PAHW_PICO) {
329 sys_name = "Pico";
330 } else if ((PicoIn.AHW & (PAHW_32X|PAHW_MCD)) == (PAHW_32X|PAHW_MCD)) {
331 sys_name = "32X + Mega CD";
332 if ((Pico.m.hardware & 0xc0) == 0x80)
333 sys_name = "32X + Sega CD";
334 } else if (PicoIn.AHW & PAHW_MCD) {
335 sys_name = "Mega CD";
336 if ((Pico.m.hardware & 0xc0) == 0x80)
337 sys_name = "Sega CD";
338 } else if (PicoIn.AHW & PAHW_32X) {
339 sys_name = "32X";
340 } else {
341 sys_name = "MegaDrive";
342 if ((Pico.m.hardware & 0xc0) == 0x80)
343 sys_name = "Genesis";
344 }
345 tv_standard = Pico.m.pal ? "PAL" : "NTSC";
346 fps = Pico.m.pal ? 50 : 60;
347
348 emu_status_msg("%s %s / %dFPS%s", tv_standard, sys_name, fps, extra);
349 }
350
do_region_override(const char * media_fname)351 static void do_region_override(const char *media_fname)
352 {
353 // we only need to override region if config tells us so
354 int ret = emu_read_config(media_fname, 0);
355 if (!ret) emu_read_config(NULL, 0);
356 }
357
emu_reload_rom(const char * rom_fname_in)358 int emu_reload_rom(const char *rom_fname_in)
359 {
360 // use setting before rom config is loaded
361 int autoload = g_autostateld_opt;
362 char *rom_fname = NULL;
363 char ext[5];
364 enum media_type_e media_type;
365 int menu_romload_started = 0;
366 char carthw_path[512];
367 int retval = 0;
368
369 lprintf("emu_ReloadRom(%s)\n", rom_fname_in);
370
371 rom_fname = strdup(rom_fname_in);
372 if (rom_fname == NULL)
373 return 0;
374
375 get_ext(rom_fname, ext);
376
377 // early cleanup
378 PicoPatchUnload();
379 if (movie_data) {
380 free(movie_data);
381 movie_data = 0;
382 }
383
384 if (!strcmp(ext, ".gmv"))
385 {
386 // check for both gmv and rom
387 int dummy;
388 FILE *movie_file = fopen(rom_fname, "rb");
389 if (!movie_file) {
390 menu_update_msg("Failed to open movie.");
391 goto out;
392 }
393 fseek(movie_file, 0, SEEK_END);
394 movie_size = ftell(movie_file);
395 fseek(movie_file, 0, SEEK_SET);
396 if (movie_size < 64+3) {
397 menu_update_msg("Invalid GMV file.");
398 fclose(movie_file);
399 goto out;
400 }
401 movie_data = malloc(movie_size);
402 if (movie_data == NULL) {
403 menu_update_msg("low memory.");
404 fclose(movie_file);
405 goto out;
406 }
407 dummy = fread(movie_data, 1, movie_size, movie_file);
408 fclose(movie_file);
409 if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {
410 menu_update_msg("Invalid GMV file.");
411 goto out;
412 }
413 dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);
414 if (!dummy) {
415 menu_update_msg("Could't find a ROM for movie.");
416 goto out;
417 }
418 get_ext(rom_fname, ext);
419 lprintf("gmv loaded for %s\n", rom_fname);
420 }
421 else if (!strcmp(ext, ".pat"))
422 {
423 int dummy;
424 PicoPatchLoad(rom_fname);
425 dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);
426 if (!dummy) {
427 menu_update_msg("Could't find a ROM to patch.");
428 goto out;
429 }
430 get_ext(rom_fname, ext);
431 }
432
433 menu_romload_prepare(rom_fname); // also CD load
434 menu_romload_started = 1;
435
436 emu_make_path(carthw_path, "carthw.cfg", sizeof(carthw_path));
437
438 media_type = PicoLoadMedia(rom_fname, carthw_path,
439 find_bios, do_region_override);
440
441 switch (media_type) {
442 case PM_BAD_DETECT:
443 menu_update_msg("Not a ROM/CD img selected.");
444 goto out;
445 case PM_BAD_CD:
446 menu_update_msg("Invalid CD image");
447 goto out;
448 case PM_BAD_CD_NO_BIOS:
449 // find_bios() prints a message
450 goto out;
451 case PM_ERROR:
452 menu_update_msg("Load error");
453 goto out;
454 default:
455 break;
456 }
457
458 // make quirks visible in UI
459 if (PicoIn.quirks & PQUIRK_FORCE_6BTN)
460 currentConfig.input_dev0 = PICO_INPUT_PAD_6BTN;
461
462 menu_romload_end();
463 menu_romload_started = 0;
464
465 if (PicoPatches) {
466 PicoPatchPrepare();
467 PicoPatchApply();
468 }
469
470 // additional movie stuff
471 if (movie_data)
472 {
473 enum input_device indev = (movie_data[0x14] == '6') ?
474 PICO_INPUT_PAD_6BTN : PICO_INPUT_PAD_3BTN;
475 PicoSetInputDevice(0, indev);
476 PicoSetInputDevice(1, indev);
477
478 PicoIn.opt |= POPT_DIS_VDP_FIFO; // no VDP fifo timing
479 if (movie_data[0xF] >= 'A') {
480 if (movie_data[0x16] & 0x80) {
481 PicoIn.regionOverride = 8;
482 } else {
483 PicoIn.regionOverride = 4;
484 }
485 PicoReset();
486 // TODO: bits 6 & 5
487 }
488 movie_data[0x18+30] = 0;
489 emu_status_msg("MOVIE: %s", (char *) &movie_data[0x18]);
490 }
491 else
492 {
493 system_announce();
494 PicoIn.opt &= ~POPT_DIS_VDP_FIFO;
495 }
496
497 strncpy(rom_fname_loaded, rom_fname, sizeof(rom_fname_loaded)-1);
498 rom_fname_loaded[sizeof(rom_fname_loaded)-1] = 0;
499
500 // load SRAM for this ROM
501 if (currentConfig.EmuOpt & EOPT_EN_SRAM)
502 emu_save_load_game(1, 1);
503
504 // state autoload?
505 if (autoload) {
506 int time, newest = 0, newest_slot = -1;
507 int slot;
508
509 for (slot = 0; slot < 10; slot++) {
510 if (emu_check_save_file(slot, &time)) {
511 if (time > newest) {
512 newest = time;
513 newest_slot = slot;
514 }
515 }
516 }
517
518 if (newest_slot >= 0) {
519 lprintf("autoload slot %d\n", newest_slot);
520 state_slot = newest_slot;
521 emu_save_load_game(1, 0);
522 }
523 else {
524 lprintf("no save to autoload.\n");
525 }
526 }
527
528 retval = 1;
529 out:
530 if (menu_romload_started)
531 menu_romload_end();
532 free(rom_fname);
533 return retval;
534 }
535
emu_swap_cd(const char * fname)536 int emu_swap_cd(const char *fname)
537 {
538 enum cd_img_type cd_type;
539 int ret = -1;
540
541 cd_type = PicoCdCheck(fname, NULL);
542 if (cd_type != CIT_NOT_CD)
543 ret = cdd_load(fname, cd_type);
544 if (ret != 0) {
545 menu_update_msg("Load failed, invalid CD image?");
546 return 0;
547 }
548
549 strncpy(rom_fname_loaded, fname, sizeof(rom_fname_loaded)-1);
550 rom_fname_loaded[sizeof(rom_fname_loaded) - 1] = 0;
551
552 return 1;
553 }
554
555 // <base dir><end>
emu_make_path(char * buff,const char * end,int size)556 void emu_make_path(char *buff, const char *end, int size)
557 {
558 int pos, end_len;
559
560 end_len = strlen(end);
561 pos = plat_get_root_dir(buff, size);
562 strncpy(buff + pos, end, size - pos);
563 buff[size - 1] = 0;
564 if (pos + end_len > size - 1)
565 lprintf("Warning: path truncated: %s\n", buff);
566 }
567
make_config_cfg(char * cfg_buff_512)568 static void make_config_cfg(char *cfg_buff_512)
569 {
570 emu_make_path(cfg_buff_512, PicoConfigFile, 512-6);
571 if (config_slot != 0)
572 {
573 char *p = strrchr(cfg_buff_512, '.');
574 if (p == NULL)
575 p = cfg_buff_512 + strlen(cfg_buff_512);
576 sprintf(p, ".%i.cfg", config_slot);
577 }
578 cfg_buff_512[511] = 0;
579 }
580
emu_prep_defconfig(void)581 void emu_prep_defconfig(void)
582 {
583 memset(&defaultConfig, 0, sizeof(defaultConfig));
584 defaultConfig.EmuOpt = 0x9d | EOPT_EN_CD_LEDS;
585 defaultConfig.s_PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |
586 POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
587 POPT_EN_DRC|POPT_ACC_SPRITES |
588 POPT_EN_32X|POPT_EN_PWM;
589 defaultConfig.s_PsndRate = 44100;
590 defaultConfig.s_PicoRegion = 0; // auto
591 defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
592 defaultConfig.s_PicoCDBuffers = 0;
593 defaultConfig.confirm_save = EOPT_CONFIRM_SAVE;
594 defaultConfig.Frameskip = -1; // auto
595 defaultConfig.input_dev0 = PICO_INPUT_PAD_3BTN;
596 defaultConfig.input_dev1 = PICO_INPUT_PAD_3BTN;
597 defaultConfig.volume = 50;
598 defaultConfig.gamma = 100;
599 defaultConfig.scaling = 0;
600 defaultConfig.turbo_rate = 15;
601 defaultConfig.msh2_khz = PICO_MSH2_HZ / 1000;
602 defaultConfig.ssh2_khz = PICO_SSH2_HZ / 1000;
603
604 // platform specific overrides
605 pemu_prep_defconfig();
606 }
607
emu_set_defconfig(void)608 void emu_set_defconfig(void)
609 {
610 memcpy(¤tConfig, &defaultConfig, sizeof(currentConfig));
611 PicoIn.opt = currentConfig.s_PicoOpt;
612 PicoIn.sndRate = currentConfig.s_PsndRate;
613 PicoIn.regionOverride = currentConfig.s_PicoRegion;
614 PicoIn.autoRgnOrder = currentConfig.s_PicoAutoRgnOrder;
615 }
616
emu_read_config(const char * rom_fname,int no_defaults)617 int emu_read_config(const char *rom_fname, int no_defaults)
618 {
619 char cfg[512];
620 int ret;
621
622 if (!no_defaults)
623 emu_set_defconfig();
624
625 if (rom_fname == NULL)
626 {
627 // global config
628 make_config_cfg(cfg);
629 ret = config_readsect(cfg, NULL);
630 }
631 else
632 {
633 char ext[16];
634 int vol;
635
636 if (config_slot != 0)
637 snprintf(ext, sizeof(ext), ".%i.cfg", config_slot);
638 else
639 strcpy(ext, ".cfg");
640
641 fname_ext(cfg, sizeof(cfg), "cfg"PATH_SEP, ext, rom_fname);
642
643 // read user's config
644 vol = currentConfig.volume;
645 ret = config_readsect(cfg, NULL);
646 currentConfig.volume = vol; // make vol global (bah)
647
648 if (ret != 0)
649 {
650 // read global config, and apply game_def.cfg on top
651 make_config_cfg(cfg);
652 config_readsect(cfg, NULL);
653
654 emu_make_path(cfg, "game_def.cfg", sizeof(cfg));
655 ret = config_readsect(cfg, emu_make_rom_id(rom_fname));
656 }
657 }
658
659 pemu_validate_config();
660 PicoIn.overclockM68k = currentConfig.overclock_68k;
661
662 // some sanity checks
663 #ifdef PSP
664 /* TODO: mv to plat_validate_config() */
665 if (currentConfig.CPUclock < 10 || currentConfig.CPUclock > 4096) currentConfig.CPUclock = 200;
666 if (currentConfig.gamma < -4 || currentConfig.gamma > 16) currentConfig.gamma = 0;
667 if (currentConfig.gamma2 < 0 || currentConfig.gamma2 > 2) currentConfig.gamma2 = 0;
668 #endif
669 if (currentConfig.volume < 0 || currentConfig.volume > 99)
670 currentConfig.volume = 50;
671
672 if (ret == 0)
673 config_slot_current = config_slot;
674
675 return (ret == 0);
676 }
677
678
emu_write_config(int is_game)679 int emu_write_config(int is_game)
680 {
681 char cfg[512];
682 int ret, write_lrom = 0;
683
684 if (!is_game)
685 {
686 make_config_cfg(cfg);
687 write_lrom = 1;
688 } else {
689 char ext[16];
690
691 if (config_slot != 0)
692 snprintf(ext, sizeof(ext), ".%i.cfg", config_slot);
693 else
694 strcpy(ext, ".cfg");
695
696 romfname_ext(cfg, sizeof(cfg), "cfg"PATH_SEP, ext);
697 }
698
699 lprintf("emu_write_config: %s ", cfg);
700 ret = config_write(cfg);
701 if (write_lrom) config_writelrom(cfg);
702 #ifdef __GP2X__
703 sync();
704 #endif
705 lprintf((ret == 0) ? "(ok)\n" : "(failed)\n");
706
707 if (ret == 0) config_slot_current = config_slot;
708 return ret == 0;
709 }
710
711
712 /* always using built-in font */
713
714 #define mk_text_out(name, type, val, topleft, step_x, step_y) \
715 void name(int x, int y, const char *text) \
716 { \
717 int i, l, len = strlen(text); \
718 type *screen = (type *)(topleft) + x * step_x + y * step_y; \
719 \
720 for (i = 0; i < len; i++, screen += 8 * step_x) \
721 { \
722 for (l = 0; l < 8; l++) \
723 { \
724 unsigned char fd = fontdata8x8[text[i] * 8 + l];\
725 type *s = screen + l * step_y; \
726 if (fd&0x80) s[step_x * 0] = val; \
727 if (fd&0x40) s[step_x * 1] = val; \
728 if (fd&0x20) s[step_x * 2] = val; \
729 if (fd&0x10) s[step_x * 3] = val; \
730 if (fd&0x08) s[step_x * 4] = val; \
731 if (fd&0x04) s[step_x * 5] = val; \
732 if (fd&0x02) s[step_x * 6] = val; \
733 if (fd&0x01) s[step_x * 7] = val; \
734 } \
735 } \
736 }
737
738 mk_text_out(emu_text_out8, unsigned char, 0xf0, g_screen_ptr, 1, g_screen_ppitch)
739 mk_text_out(emu_text_out16, unsigned short, 0xffff, g_screen_ptr, 1, g_screen_ppitch)
740 mk_text_out(emu_text_out8_rot, unsigned char, 0xf0,
741 (char *)g_screen_ptr + (g_screen_ppitch - 1) * g_screen_height, -g_screen_height, 1)
742 mk_text_out(emu_text_out16_rot, unsigned short, 0xffff,
743 (short *)g_screen_ptr + (g_screen_ppitch - 1) * g_screen_height, -g_screen_height, 1)
744
745 #undef mk_text_out
746
emu_osd_text16(int x,int y,const char * text)747 void emu_osd_text16(int x, int y, const char *text)
748 {
749 int len = strlen(text) * 8;
750 int i, h;
751
752 len++;
753 if (x + len > g_screen_width)
754 len = g_screen_width - x;
755
756 for (h = 0; h < 8; h++) {
757 unsigned short *p;
758 p = (unsigned short *)g_screen_ptr
759 + x + g_screen_ppitch * (y + h);
760 for (i = len; i > 0; i--, p++)
761 *p = (*p >> 2) & 0x39e7;
762 }
763 emu_text_out16(x, y, text);
764 }
765
update_movie(void)766 static void update_movie(void)
767 {
768 int offs = Pico.m.frame_count*3 + 0x40;
769 if (offs+3 > movie_size) {
770 free(movie_data);
771 movie_data = 0;
772 emu_status_msg("END OF MOVIE.");
773 lprintf("END OF MOVIE.\n");
774 } else {
775 // MXYZ SACB RLDU
776 PicoIn.pad[0] = ~movie_data[offs] & 0x8f; // ! SCBA RLDU
777 if(!(movie_data[offs] & 0x10)) PicoIn.pad[0] |= 0x40; // C
778 if(!(movie_data[offs] & 0x20)) PicoIn.pad[0] |= 0x10; // A
779 if(!(movie_data[offs] & 0x40)) PicoIn.pad[0] |= 0x20; // B
780 PicoIn.pad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU
781 if(!(movie_data[offs+1] & 0x10)) PicoIn.pad[1] |= 0x40; // C
782 if(!(movie_data[offs+1] & 0x20)) PicoIn.pad[1] |= 0x10; // A
783 if(!(movie_data[offs+1] & 0x40)) PicoIn.pad[1] |= 0x20; // B
784 PicoIn.pad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX
785 if(!(movie_data[offs+2] & 0x01)) PicoIn.pad[0] |= 0x0400; // X
786 if(!(movie_data[offs+2] & 0x04)) PicoIn.pad[0] |= 0x0100; // Z
787 PicoIn.pad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX
788 if(!(movie_data[offs+2] & 0x10)) PicoIn.pad[1] |= 0x0400; // X
789 if(!(movie_data[offs+2] & 0x40)) PicoIn.pad[1] |= 0x0100; // Z
790 }
791 }
792
try_ropen_file(const char * fname,int * time)793 static int try_ropen_file(const char *fname, int *time)
794 {
795 struct stat st;
796 FILE *f;
797
798 f = fopen(fname, "rb");
799 if (f) {
800 if (time != NULL) {
801 *time = 0;
802 if (fstat(fileno(f), &st) == 0)
803 *time = (int)st.st_mtime;
804 }
805 fclose(f);
806 return 1;
807 }
808 return 0;
809 }
810
emu_get_save_fname(int load,int is_sram,int slot,int * time)811 char *emu_get_save_fname(int load, int is_sram, int slot, int *time)
812 {
813 char *saveFname = static_buff;
814 char ext[16];
815
816 if (is_sram)
817 {
818 strcpy(ext, (PicoIn.AHW & PAHW_MCD) ? ".brm" : ".srm");
819 romfname_ext(saveFname, sizeof(static_buff),
820 (PicoIn.AHW & PAHW_MCD) ? "brm"PATH_SEP : "srm"PATH_SEP, ext);
821 if (!load)
822 return saveFname;
823
824 if (try_ropen_file(saveFname, time))
825 return saveFname;
826
827 romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
828 if (try_ropen_file(saveFname, time))
829 return saveFname;
830 }
831 else
832 {
833 const char *ext_main = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds.gz" : ".mds";
834 const char *ext_othr = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds" : ".mds.gz";
835 ext[0] = 0;
836 if (slot > 0 && slot < 10)
837 sprintf(ext, ".%i", slot);
838 strcat(ext, ext_main);
839
840 if (!load) {
841 romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
842 return saveFname;
843 }
844 else {
845 romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
846 if (try_ropen_file(saveFname, time))
847 return saveFname;
848
849 romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
850 if (try_ropen_file(saveFname, time))
851 return saveFname;
852
853 // try the other ext
854 ext[0] = 0;
855 if (slot > 0 && slot < 10)
856 sprintf(ext, ".%i", slot);
857 strcat(ext, ext_othr);
858
859 romfname_ext(saveFname, sizeof(static_buff), "mds"PATH_SEP, ext);
860 if (try_ropen_file(saveFname, time))
861 return saveFname;
862 }
863 }
864
865 return NULL;
866 }
867
emu_check_save_file(int slot,int * time)868 int emu_check_save_file(int slot, int *time)
869 {
870 return emu_get_save_fname(1, 0, slot, time) ? 1 : 0;
871 }
872
emu_save_load_game(int load,int sram)873 int emu_save_load_game(int load, int sram)
874 {
875 int ret = 0;
876 char *saveFname;
877
878 // make save filename
879 saveFname = emu_get_save_fname(load, sram, state_slot, NULL);
880 if (saveFname == NULL) {
881 if (!sram)
882 emu_status_msg(load ? "LOAD FAILED (missing file)" : "SAVE FAILED");
883 return -1;
884 }
885
886 lprintf("saveLoad (%i, %i): %s\n", load, sram, saveFname);
887
888 if (sram)
889 {
890 FILE *sramFile;
891 int sram_size;
892 unsigned char *sram_data;
893 int truncate = 1;
894 if (PicoIn.AHW & PAHW_MCD)
895 {
896 if (PicoIn.opt & POPT_EN_MCD_RAMCART) {
897 sram_size = 0x12000;
898 sram_data = Pico.sv.data;
899 if (sram_data)
900 memcpy(sram_data, Pico_mcd->bram, 0x2000);
901 } else {
902 sram_size = 0x2000;
903 sram_data = Pico_mcd->bram;
904 truncate = 0; // the .brm may contain RAM cart data after normal brm
905 }
906 } else {
907 sram_size = Pico.sv.size;
908 sram_data = Pico.sv.data;
909 }
910 if (sram_data == NULL)
911 return 0; // cart saves forcefully disabled for this game
912
913 if (load)
914 {
915 sramFile = fopen(saveFname, "rb");
916 if (!sramFile)
917 return -1;
918 ret = fread(sram_data, 1, sram_size, sramFile);
919 ret = ret > 0 ? 0 : -1;
920 fclose(sramFile);
921 if ((PicoIn.AHW & PAHW_MCD) && (PicoIn.opt&POPT_EN_MCD_RAMCART))
922 memcpy(Pico_mcd->bram, sram_data, 0x2000);
923 } else {
924 // sram save needs some special processing
925 // see if we have anything to save
926 for (; sram_size > 0; sram_size--)
927 if (sram_data[sram_size-1]) break;
928
929 if (sram_size) {
930 sramFile = fopen(saveFname, truncate ? "wb" : "r+b");
931 if (!sramFile) sramFile = fopen(saveFname, "wb"); // retry
932 if (!sramFile) return -1;
933 ret = fwrite(sram_data, 1, sram_size, sramFile);
934 ret = (ret != sram_size) ? -1 : 0;
935 fclose(sramFile);
936 #ifdef __GP2X__
937 sync();
938 #endif
939 }
940 }
941 return ret;
942 }
943 else
944 {
945 ret = PicoState(saveFname, !load);
946 if (!ret) {
947 #ifdef __GP2X__
948 if (!load) sync();
949 #endif
950 emu_status_msg(load ? "STATE LOADED" : "STATE SAVED");
951 } else {
952 emu_status_msg(load ? "LOAD FAILED" : "SAVE FAILED");
953 ret = -1;
954 }
955
956 return ret;
957 }
958 }
959
emu_set_fastforward(int set_on)960 void emu_set_fastforward(int set_on)
961 {
962 static void *set_PsndOut = NULL;
963 static int set_Frameskip, set_EmuOpt, is_on = 0;
964
965 if (set_on && !is_on) {
966 set_PsndOut = PicoIn.sndOut;
967 set_Frameskip = currentConfig.Frameskip;
968 set_EmuOpt = currentConfig.EmuOpt;
969 PicoIn.sndOut = NULL;
970 currentConfig.Frameskip = 8;
971 currentConfig.EmuOpt &= ~4;
972 currentConfig.EmuOpt |= 0x40000;
973 is_on = 1;
974 emu_status_msg("FAST FORWARD");
975 }
976 else if (!set_on && is_on) {
977 PicoIn.sndOut = set_PsndOut;
978 currentConfig.Frameskip = set_Frameskip;
979 currentConfig.EmuOpt = set_EmuOpt;
980 PsndRerate(1);
981 is_on = 0;
982 // mainly to unbreak pcm
983 if (PicoIn.AHW & PAHW_MCD)
984 pcd_state_loaded();
985 }
986 }
987
emu_tray_open(void)988 static void emu_tray_open(void)
989 {
990 engineState = PGS_TrayMenu;
991 }
992
emu_tray_close(void)993 static void emu_tray_close(void)
994 {
995 emu_status_msg("CD tray closed.");
996 }
997
emu_32x_startup(void)998 void emu_32x_startup(void)
999 {
1000 plat_video_toggle_renderer(0, 0); // HACK
1001 system_announce();
1002 }
1003
emu_reset_game(void)1004 void emu_reset_game(void)
1005 {
1006 PicoReset();
1007 reset_timing = 1;
1008 }
1009
run_events_pico(unsigned int events)1010 void run_events_pico(unsigned int events)
1011 {
1012 int lim_x;
1013
1014 if (events & PEV_PICO_SWINP) {
1015 pico_inp_mode++;
1016 if (pico_inp_mode > 2)
1017 pico_inp_mode = 0;
1018 switch (pico_inp_mode) {
1019 case 2: emu_status_msg("Input: Pen on Pad"); break;
1020 case 1: emu_status_msg("Input: Pen on Storyware"); break;
1021 case 0: emu_status_msg("Input: Joystick");
1022 PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;
1023 break;
1024 }
1025 }
1026 if (events & PEV_PICO_PPREV) {
1027 PicoPicohw.page--;
1028 if (PicoPicohw.page < 0)
1029 PicoPicohw.page = 0;
1030 emu_status_msg("Page %i", PicoPicohw.page);
1031 }
1032 if (events & PEV_PICO_PNEXT) {
1033 PicoPicohw.page++;
1034 if (PicoPicohw.page > 6)
1035 PicoPicohw.page = 6;
1036 emu_status_msg("Page %i", PicoPicohw.page);
1037 }
1038
1039 if (pico_inp_mode == 0)
1040 return;
1041
1042 /* handle other input modes */
1043 if (PicoIn.pad[0] & 1) pico_pen_y--;
1044 if (PicoIn.pad[0] & 2) pico_pen_y++;
1045 if (PicoIn.pad[0] & 4) pico_pen_x--;
1046 if (PicoIn.pad[0] & 8) pico_pen_x++;
1047 PicoIn.pad[0] &= ~0x0f; // release UDLR
1048
1049 lim_x = (Pico.video.reg[12]&1) ? 319 : 255;
1050 if (pico_pen_y < 8)
1051 pico_pen_y = 8;
1052 if (pico_pen_y > 224 - PICO_PEN_ADJUST_Y)
1053 pico_pen_y = 224 - PICO_PEN_ADJUST_Y;
1054 if (pico_pen_x < 0)
1055 pico_pen_x = 0;
1056 if (pico_pen_x > lim_x - PICO_PEN_ADJUST_X)
1057 pico_pen_x = lim_x - PICO_PEN_ADJUST_X;
1058
1059 PicoPicohw.pen_pos[0] = pico_pen_x;
1060 if (!(Pico.video.reg[12] & 1))
1061 PicoPicohw.pen_pos[0] += pico_pen_x / 4;
1062 PicoPicohw.pen_pos[0] += 0x3c;
1063 PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);
1064 }
1065
do_turbo(unsigned short * pad,int acts)1066 static void do_turbo(unsigned short *pad, int acts)
1067 {
1068 static int turbo_pad = 0;
1069 static unsigned char turbo_cnt[3] = { 0, 0, 0 };
1070 int inc = currentConfig.turbo_rate * 2;
1071
1072 if (acts & 0x1000) {
1073 turbo_cnt[0] += inc;
1074 if (turbo_cnt[0] >= 60)
1075 turbo_pad ^= 0x10, turbo_cnt[0] = 0;
1076 }
1077 if (acts & 0x2000) {
1078 turbo_cnt[1] += inc;
1079 if (turbo_cnt[1] >= 60)
1080 turbo_pad ^= 0x20, turbo_cnt[1] = 0;
1081 }
1082 if (acts & 0x4000) {
1083 turbo_cnt[2] += inc;
1084 if (turbo_cnt[2] >= 60)
1085 turbo_pad ^= 0x40, turbo_cnt[2] = 0;
1086 }
1087 *pad |= turbo_pad & (acts >> 8);
1088 }
1089
run_events_ui(unsigned int which)1090 static void run_events_ui(unsigned int which)
1091 {
1092 if (which & (PEV_STATE_LOAD|PEV_STATE_SAVE))
1093 {
1094 int do_it = 1;
1095 if ( emu_check_save_file(state_slot, NULL) &&
1096 (((which & PEV_STATE_LOAD) && (currentConfig.confirm_save & EOPT_CONFIRM_LOAD)) ||
1097 ((which & PEV_STATE_SAVE) && (currentConfig.confirm_save & EOPT_CONFIRM_SAVE))) )
1098 {
1099 const char *nm;
1100 char tmp[64];
1101 int keys, len;
1102
1103 strcpy(tmp, (which & PEV_STATE_LOAD) ? "LOAD STATE? " : "OVERWRITE SAVE? ");
1104 len = strlen(tmp);
1105 nm = in_get_key_name(-1, -PBTN_MOK);
1106 snprintf(tmp + len, sizeof(tmp) - len, "(%s=yes, ", nm);
1107 len = strlen(tmp);
1108 nm = in_get_key_name(-1, -PBTN_MBACK);
1109 snprintf(tmp + len, sizeof(tmp) - len, "%s=no)", nm);
1110
1111 plat_status_msg_busy_first(tmp);
1112
1113 in_set_config_int(0, IN_CFG_BLOCKING, 1);
1114 while (in_menu_wait_any(NULL, 50) & (PBTN_MOK | PBTN_MBACK))
1115 ;
1116 while ( !((keys = in_menu_wait_any(NULL, 50)) & (PBTN_MOK | PBTN_MBACK)))
1117 ;
1118 if (keys & PBTN_MBACK)
1119 do_it = 0;
1120 while (in_menu_wait_any(NULL, 50) & (PBTN_MOK | PBTN_MBACK))
1121 ;
1122 in_set_config_int(0, IN_CFG_BLOCKING, 0);
1123 }
1124 if (do_it) {
1125 plat_status_msg_busy_first((which & PEV_STATE_LOAD) ? "LOADING STATE" : "SAVING STATE");
1126 PicoStateProgressCB = plat_status_msg_busy_next;
1127 emu_save_load_game((which & PEV_STATE_LOAD) ? 1 : 0, 0);
1128 PicoStateProgressCB = NULL;
1129 }
1130 }
1131 if (which & PEV_SWITCH_RND)
1132 {
1133 plat_video_toggle_renderer(1, 0);
1134 }
1135 if (which & (PEV_SSLOT_PREV|PEV_SSLOT_NEXT))
1136 {
1137 if (which & PEV_SSLOT_PREV) {
1138 state_slot -= 1;
1139 if (state_slot < 0)
1140 state_slot = 9;
1141 } else {
1142 state_slot += 1;
1143 if (state_slot > 9)
1144 state_slot = 0;
1145 }
1146
1147 emu_status_msg("SAVE SLOT %i [%s]", state_slot,
1148 emu_check_save_file(state_slot, NULL) ? "USED" : "FREE");
1149 }
1150 if (which & PEV_RESET)
1151 emu_reset_game();
1152 if (which & PEV_MENU)
1153 engineState = PGS_Menu;
1154 }
1155
emu_update_input(void)1156 void emu_update_input(void)
1157 {
1158 static int prev_events = 0;
1159 int actions[IN_BINDTYPE_COUNT] = { 0, };
1160 int pl_actions[2];
1161 int events;
1162
1163 in_update(actions);
1164
1165 pl_actions[0] = actions[IN_BINDTYPE_PLAYER12];
1166 pl_actions[1] = actions[IN_BINDTYPE_PLAYER12] >> 16;
1167
1168 PicoIn.pad[0] = pl_actions[0] & 0xfff;
1169 PicoIn.pad[1] = pl_actions[1] & 0xfff;
1170
1171 if (pl_actions[0] & 0x7000)
1172 do_turbo(&PicoIn.pad[0], pl_actions[0]);
1173 if (pl_actions[1] & 0x7000)
1174 do_turbo(&PicoIn.pad[1], pl_actions[1]);
1175
1176 events = actions[IN_BINDTYPE_EMU] & PEV_MASK;
1177
1178 // volume is treated in special way and triggered every frame
1179 if (events & (PEV_VOL_DOWN|PEV_VOL_UP))
1180 plat_update_volume(1, events & PEV_VOL_UP);
1181
1182 if ((events ^ prev_events) & PEV_FF) {
1183 emu_set_fastforward(events & PEV_FF);
1184 plat_update_volume(0, 0);
1185 reset_timing = 1;
1186 }
1187
1188 events &= ~prev_events;
1189
1190 if (PicoIn.AHW == PAHW_PICO)
1191 run_events_pico(events);
1192 if (events)
1193 run_events_ui(events);
1194 if (movie_data)
1195 update_movie();
1196
1197 prev_events = actions[IN_BINDTYPE_EMU] & PEV_MASK;
1198 }
1199
mkdir_path(char * path_with_reserve,int pos,const char * name)1200 static void mkdir_path(char *path_with_reserve, int pos, const char *name)
1201 {
1202 strcpy(path_with_reserve + pos, name);
1203 if (plat_is_dir(path_with_reserve))
1204 return;
1205 if (mkdir(path_with_reserve, 0777) < 0)
1206 lprintf("failed to create: %s\n", path_with_reserve);
1207 }
1208
emu_cmn_forced_frame(int no_scale,int do_emu)1209 void emu_cmn_forced_frame(int no_scale, int do_emu)
1210 {
1211 int po_old = PicoIn.opt;
1212 int y;
1213
1214 for (y = 0; y < g_screen_height; y++)
1215 memset32((short *)g_screen_ptr + g_screen_ppitch * y, 0,
1216 g_screen_width * 2 / 4);
1217
1218 PicoIn.opt &= ~POPT_ALT_RENDERER;
1219 PicoIn.opt |= POPT_ACC_SPRITES;
1220 if (!no_scale)
1221 PicoIn.opt |= POPT_EN_SOFTSCALE;
1222
1223 PicoDrawSetOutFormat(PDF_RGB555, 1);
1224 Pico.m.dirtyPal = 1;
1225 if (do_emu)
1226 PicoFrame();
1227 else
1228 PicoFrameDrawOnly();
1229
1230 PicoIn.opt = po_old;
1231 }
1232
emu_init(void)1233 void emu_init(void)
1234 {
1235 char path[512];
1236 int pos;
1237
1238 #if 0
1239 // FIXME: handle through menu, etc
1240 FILE *f;
1241 f = fopen("32X_M_BIOS.BIN", "rb");
1242 p32x_bios_m = malloc(2048);
1243 fread(p32x_bios_m, 1, 2048, f);
1244 fclose(f);
1245 f = fopen("32X_S_BIOS.BIN", "rb");
1246 p32x_bios_s = malloc(1024);
1247 fread(p32x_bios_s, 1, 1024, f);
1248 fclose(f);
1249 #endif
1250
1251 /* make dirs for saves */
1252 pos = plat_get_root_dir(path, sizeof(path) - 4);
1253 mkdir_path(path, pos, "mds");
1254 mkdir_path(path, pos, "srm");
1255 mkdir_path(path, pos, "brm");
1256 mkdir_path(path, pos, "cfg");
1257
1258 pprof_init();
1259
1260 make_config_cfg(path);
1261 config_readlrom(path);
1262
1263 PicoInit();
1264 PicoIn.osdMessage = plat_status_msg_busy_next;
1265 PicoIn.mcdTrayOpen = emu_tray_open;
1266 PicoIn.mcdTrayClose = emu_tray_close;
1267
1268 sndout_init();
1269 }
1270
emu_finish(void)1271 void emu_finish(void)
1272 {
1273 // save SRAM
1274 if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && Pico.sv.changed) {
1275 emu_save_load_game(0, 1);
1276 Pico.sv.changed = 0;
1277 }
1278
1279 if (!(currentConfig.EmuOpt & EOPT_NO_AUTOSVCFG)) {
1280 char cfg[512];
1281 make_config_cfg(cfg);
1282 config_writelrom(cfg);
1283 #ifdef __GP2X__
1284 sync();
1285 #endif
1286 }
1287
1288 pprof_finish();
1289
1290 PicoExit();
1291 sndout_exit();
1292 }
1293
snd_write_nonblocking(int len)1294 static void snd_write_nonblocking(int len)
1295 {
1296 sndout_write_nb(PicoIn.sndOut, len);
1297 }
1298
emu_sound_start(void)1299 void emu_sound_start(void)
1300 {
1301 PicoIn.sndOut = NULL;
1302
1303 if (currentConfig.EmuOpt & EOPT_EN_SOUND)
1304 {
1305 int is_stereo = (PicoIn.opt & POPT_EN_STEREO) ? 1 : 0;
1306
1307 PsndRerate(Pico.m.frame_count ? 1 : 0);
1308
1309 printf("starting audio: %i len: %i stereo: %i, pal: %i\n",
1310 PicoIn.sndRate, Pico.snd.len, is_stereo, Pico.m.pal);
1311 sndout_start(PicoIn.sndRate, is_stereo);
1312 PicoIn.writeSound = snd_write_nonblocking;
1313 plat_update_volume(0, 0);
1314 memset(sndBuffer, 0, sizeof(sndBuffer));
1315 PicoIn.sndOut = sndBuffer;
1316 }
1317 }
1318
emu_sound_stop(void)1319 void emu_sound_stop(void)
1320 {
1321 sndout_stop();
1322 }
1323
emu_sound_wait(void)1324 void emu_sound_wait(void)
1325 {
1326 sndout_wait();
1327 }
1328
emu_loop_prep(void)1329 static void emu_loop_prep(void)
1330 {
1331 static int pal_old = -1;
1332 static int filter_old = -1;
1333
1334 if (currentConfig.CPUclock != plat_target_cpu_clock_get())
1335 plat_target_cpu_clock_set(currentConfig.CPUclock);
1336
1337 if (Pico.m.pal != pal_old) {
1338 plat_target_lcdrate_set(Pico.m.pal);
1339 pal_old = Pico.m.pal;
1340 }
1341
1342 if (currentConfig.filter != filter_old) {
1343 plat_target_hwfilter_set(currentConfig.filter);
1344 filter_old = currentConfig.filter;
1345 }
1346
1347 plat_target_gamma_set(currentConfig.gamma, 0);
1348
1349 pemu_loop_prep();
1350 }
1351
1352 /* our tick here is 1 us right now */
1353 #define ms_to_ticks(x) (unsigned int)(x * 1000)
1354 #define get_ticks() plat_get_ticks_us()
1355
emu_loop(void)1356 void emu_loop(void)
1357 {
1358 int frames_done, frames_shown; /* actual frames for fps counter */
1359 int target_frametime_x3;
1360 unsigned int timestamp_x3 = 0;
1361 unsigned int timestamp_aim_x3 = 0;
1362 unsigned int timestamp_fps_x3 = 0;
1363 char *notice_msg = NULL;
1364 char fpsbuff[24];
1365 int fskip_cnt = 0;
1366
1367 fpsbuff[0] = 0;
1368
1369 PicoLoopPrepare();
1370
1371 plat_video_loop_prepare();
1372 emu_loop_prep();
1373 pemu_sound_start();
1374
1375 /* number of ticks per frame */
1376 if (Pico.m.pal)
1377 target_frametime_x3 = 3 * ms_to_ticks(1000) / 50;
1378 else
1379 target_frametime_x3 = 3 * ms_to_ticks(1000) / 60;
1380
1381 reset_timing = 1;
1382 frames_done = frames_shown = 0;
1383
1384 /* loop with resync every 1 sec. */
1385 while (engineState == PGS_Running)
1386 {
1387 int skip = 0;
1388 int diff;
1389
1390 pprof_start(main);
1391
1392 if (reset_timing) {
1393 reset_timing = 0;
1394 plat_video_wait_vsync();
1395 timestamp_aim_x3 = get_ticks() * 3;
1396 timestamp_fps_x3 = timestamp_aim_x3;
1397 fskip_cnt = 0;
1398 }
1399 else if (currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) {
1400 timestamp_aim_x3 = get_ticks() * 3;
1401 }
1402
1403 timestamp_x3 = get_ticks() * 3;
1404
1405 // show notice_msg message?
1406 if (notice_msg_time != 0)
1407 {
1408 static int noticeMsgSum;
1409 if (timestamp_x3 - ms_to_ticks(notice_msg_time) * 3
1410 > ms_to_ticks(STATUS_MSG_TIMEOUT) * 3)
1411 {
1412 notice_msg_time = 0;
1413 plat_status_msg_clear();
1414 plat_video_flip();
1415 plat_status_msg_clear(); /* Do it again in case of double buffering */
1416 notice_msg = NULL;
1417 }
1418 else {
1419 int sum = noticeMsg[0] + noticeMsg[1] + noticeMsg[2];
1420 if (sum != noticeMsgSum) {
1421 plat_status_msg_clear();
1422 noticeMsgSum = sum;
1423 }
1424 notice_msg = noticeMsg;
1425 }
1426 }
1427
1428 // second changed?
1429 if (timestamp_x3 - timestamp_fps_x3 >= ms_to_ticks(1000) * 3)
1430 {
1431 #ifdef BENCHMARK
1432 static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
1433 if (++bench == 10) {
1434 bench = 0;
1435 bench_fps_s = bench_fps;
1436 bf[bfp++ & 3] = bench_fps;
1437 bench_fps = 0;
1438 }
1439 bench_fps += frames_shown;
1440 sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
1441 printf("%s\n", fpsbuff);
1442 #else
1443 if (currentConfig.EmuOpt & EOPT_SHOW_FPS)
1444 snprintf(fpsbuff, 8, "%02i/%02i ", frames_shown, frames_done);
1445 #endif
1446 frames_shown = frames_done = 0;
1447 timestamp_fps_x3 += ms_to_ticks(1000) * 3;
1448 }
1449 #ifdef PFRAMES
1450 sprintf(fpsbuff, "%i", Pico.m.frame_count);
1451 #endif
1452
1453 diff = timestamp_aim_x3 - timestamp_x3;
1454
1455 if (currentConfig.Frameskip >= 0) // frameskip enabled (or 0)
1456 {
1457 if (fskip_cnt < currentConfig.Frameskip) {
1458 fskip_cnt++;
1459 skip = 1;
1460 }
1461 else {
1462 fskip_cnt = 0;
1463 }
1464 }
1465 else if (diff < -target_frametime_x3)
1466 {
1467 /* no time left for this frame - skip */
1468 /* limit auto frameskip to 8 */
1469 if (frames_done / 8 <= frames_shown)
1470 skip = 1;
1471 }
1472
1473 // don't go in debt too much
1474 while (diff < -target_frametime_x3 * 3) {
1475 timestamp_aim_x3 += target_frametime_x3;
1476 diff = timestamp_aim_x3 - timestamp_x3;
1477 }
1478
1479 emu_update_input();
1480 if (skip) {
1481 int do_audio = diff > -target_frametime_x3 * 2;
1482 PicoIn.skipFrame = do_audio ? 1 : 2;
1483 PicoFrame();
1484 PicoIn.skipFrame = 0;
1485 }
1486 else {
1487 PicoFrame();
1488 pemu_finalize_frame(fpsbuff, notice_msg);
1489 frames_shown++;
1490 }
1491 frames_done++;
1492 timestamp_aim_x3 += target_frametime_x3;
1493
1494 if (!skip && !flip_after_sync)
1495 plat_video_flip();
1496
1497 /* frame limiter */
1498 if (!skip && !reset_timing
1499 && !(currentConfig.EmuOpt & (EOPT_NO_FRMLIMIT|EOPT_EXT_FRMLIMIT)))
1500 {
1501 unsigned int timestamp = get_ticks();
1502 diff = timestamp_aim_x3 - timestamp * 3;
1503
1504 // sleep or vsync if we are still too fast
1505 if (diff > target_frametime_x3 && (currentConfig.EmuOpt & EOPT_VSYNC)) {
1506 // we are too fast
1507 plat_video_wait_vsync();
1508 timestamp = get_ticks();
1509 diff = timestamp * 3 - timestamp_aim_x3;
1510 }
1511 if (diff > target_frametime_x3) {
1512 // still too fast
1513 plat_wait_till_us(timestamp + (diff - target_frametime_x3) / 3);
1514 }
1515 }
1516
1517 if (!skip && flip_after_sync)
1518 plat_video_flip();
1519
1520 pprof_end(main);
1521 }
1522
1523 emu_set_fastforward(0);
1524
1525 // save SRAM
1526 if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && Pico.sv.changed) {
1527 plat_status_msg_busy_first("Writing SRAM/BRAM...");
1528 emu_save_load_game(0, 1);
1529 Pico.sv.changed = 0;
1530 }
1531
1532 pemu_loop_end();
1533 emu_sound_stop();
1534 }
1535