Commit | Line | Data |
---|---|---|
2446536b | 1 | /* |
2 | * libretro core glue for PicoDrive | |
3 | * (C) notaz, 2013 | |
4 | * | |
5 | * This work is licensed under the terms of MAME license. | |
6 | * See COPYING file in the top-level directory. | |
7 | */ | |
8 | ||
9 | #define _GNU_SOURCE 1 // mremap | |
10 | #include <stdio.h> | |
11 | #include <stdarg.h> | |
12 | #include <string.h> | |
e8b61936 | 13 | #ifndef _WIN32 |
2446536b | 14 | #include <sys/mman.h> |
e8b61936 | 15 | #else |
6f1133bc | 16 | #include <io.h> |
e8b61936 | 17 | #include <windows.h> |
6f1133bc | 18 | #include <sys/types.h> |
e8b61936 | 19 | #endif |
c25d78ee | 20 | #include <errno.h> |
2446536b | 21 | #ifdef __MACH__ |
22 | #include <libkern/OSCacheControl.h> | |
23 | #endif | |
24 | ||
25 | #include <pico/pico_int.h> | |
86b38dc4 | 26 | #include <pico/state.h> |
2446536b | 27 | #include "common/input_pico.h" |
28 | #include "common/version.h" | |
29 | #include "libretro.h" | |
30 | ||
31 | static retro_video_refresh_t video_cb; | |
32 | static retro_input_poll_t input_poll_cb; | |
33 | static retro_input_state_t input_state_cb; | |
34 | static retro_environment_t environ_cb; | |
35 | static retro_audio_sample_batch_t audio_batch_cb; | |
36 | ||
37 | static FILE *emu_log; | |
38 | ||
39 | #define VOUT_MAX_WIDTH 320 | |
40 | #define VOUT_MAX_HEIGHT 240 | |
41 | static void *vout_buf; | |
42 | static int vout_width, vout_height; | |
43 | ||
44 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; | |
45 | ||
2446536b | 46 | static void snd_write(int len); |
47 | ||
48 | #ifdef _WIN32 | |
49 | #define SLASH '\\' | |
50 | #else | |
51 | #define SLASH '/' | |
52 | #endif | |
53 | ||
54 | /* functions called by the core */ | |
55 | ||
56 | void cache_flush_d_inval_i(void *start, void *end) | |
57 | { | |
58 | #ifdef __arm__ | |
59 | #if defined(__BLACKBERRY_QNX__) | |
60 | msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE); | |
61 | #elif defined(__MACH__) | |
62 | size_t len = (char *)end - (char *)start; | |
63 | sys_dcache_flush(start, len); | |
64 | sys_icache_invalidate(start, len); | |
65 | #else | |
66 | __clear_cache(start, end); | |
67 | #endif | |
68 | #endif | |
69 | } | |
70 | ||
e8b61936 | 71 | #ifdef _WIN32 |
6f1133bc T |
72 | /* mmap() replacement for Windows |
73 | * | |
74 | * Author: Mike Frysinger <vapier@gentoo.org> | |
75 | * Placed into the public domain | |
76 | */ | |
77 | ||
78 | /* References: | |
79 | * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx | |
80 | * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx | |
81 | * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx | |
82 | * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx | |
83 | */ | |
84 | ||
85 | #define PROT_READ 0x1 | |
86 | #define PROT_WRITE 0x2 | |
87 | /* This flag is only available in WinXP+ */ | |
88 | #ifdef FILE_MAP_EXECUTE | |
89 | #define PROT_EXEC 0x4 | |
90 | #else | |
91 | #define PROT_EXEC 0x0 | |
92 | #define FILE_MAP_EXECUTE 0 | |
93 | #endif | |
94 | ||
95 | #define MAP_SHARED 0x01 | |
96 | #define MAP_PRIVATE 0x02 | |
97 | #define MAP_ANONYMOUS 0x20 | |
98 | #define MAP_ANON MAP_ANONYMOUS | |
99 | #define MAP_FAILED ((void *) -1) | |
100 | ||
101 | #ifdef __USE_FILE_OFFSET64 | |
102 | # define DWORD_HI(x) (x >> 32) | |
103 | # define DWORD_LO(x) ((x) & 0xffffffff) | |
104 | #else | |
105 | # define DWORD_HI(x) (0) | |
106 | # define DWORD_LO(x) (x) | |
107 | #endif | |
108 | ||
109 | static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset) | |
2446536b | 110 | { |
6f1133bc T |
111 | if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) |
112 | return MAP_FAILED; | |
113 | if (fd == -1) { | |
114 | if (!(flags & MAP_ANON) || offset) | |
115 | return MAP_FAILED; | |
116 | } else if (flags & MAP_ANON) | |
117 | return MAP_FAILED; | |
118 | ||
119 | DWORD flProtect; | |
120 | if (prot & PROT_WRITE) { | |
121 | if (prot & PROT_EXEC) | |
122 | flProtect = PAGE_EXECUTE_READWRITE; | |
123 | else | |
124 | flProtect = PAGE_READWRITE; | |
125 | } else if (prot & PROT_EXEC) { | |
126 | if (prot & PROT_READ) | |
127 | flProtect = PAGE_EXECUTE_READ; | |
128 | else if (prot & PROT_EXEC) | |
129 | flProtect = PAGE_EXECUTE; | |
130 | } else | |
131 | flProtect = PAGE_READONLY; | |
132 | ||
133 | off_t end = length + offset; | |
134 | HANDLE mmap_fd, h; | |
135 | if (fd == -1) | |
136 | mmap_fd = INVALID_HANDLE_VALUE; | |
137 | else | |
138 | mmap_fd = (HANDLE)_get_osfhandle(fd); | |
139 | h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL); | |
140 | if (h == NULL) | |
141 | return MAP_FAILED; | |
142 | ||
143 | DWORD dwDesiredAccess; | |
144 | if (prot & PROT_WRITE) | |
145 | dwDesiredAccess = FILE_MAP_WRITE; | |
146 | else | |
147 | dwDesiredAccess = FILE_MAP_READ; | |
148 | if (prot & PROT_EXEC) | |
149 | dwDesiredAccess |= FILE_MAP_EXECUTE; | |
150 | if (flags & MAP_PRIVATE) | |
151 | dwDesiredAccess |= FILE_MAP_COPY; | |
152 | void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length); | |
153 | if (ret == NULL) { | |
154 | CloseHandle(h); | |
155 | ret = MAP_FAILED; | |
156 | } | |
157 | return ret; | |
e8b61936 | 158 | } |
2446536b | 159 | |
6f1133bc | 160 | static void munmap(void *addr, size_t length) |
e8b61936 | 161 | { |
6f1133bc T |
162 | UnmapViewOfFile(addr); |
163 | /* ruh-ro, we leaked handle from CreateFileMapping() ... */ | |
e8b61936 | 164 | } |
e8b61936 | 165 | #endif |
8e5639bc | 166 | |
167 | #ifndef MAP_ANONYMOUS | |
168 | #define MAP_ANONYMOUS MAP_ANON | |
169 | #endif | |
170 | ||
e8b61936 | 171 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
172 | { | |
e8b61936 | 173 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
174 | void *req, *ret; | |
175 | ||
176 | req = (void *)addr; | |
177 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
178 | if (ret == MAP_FAILED) { | |
179 | lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno); | |
180 | return NULL; | |
181 | } | |
182 | ||
183 | if (addr != 0 && ret != (void *)addr) { | |
184 | lprintf("warning: wanted to map @%08lx, got %p\n", | |
185 | addr, ret); | |
186 | ||
187 | if (is_fixed) { | |
188 | munmap(ret, size); | |
189 | return NULL; | |
190 | } | |
191 | } | |
2446536b | 192 | |
193 | return ret; | |
194 | } | |
195 | ||
196 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) | |
197 | { | |
8c8b7284 | 198 | #ifdef __linux__ |
2446536b | 199 | void *ret = mremap(ptr, oldsize, newsize, 0); |
200 | if (ret == MAP_FAILED) | |
201 | return NULL; | |
202 | ||
203 | return ret; | |
8c8b7284 | 204 | #else |
205 | void *tmp, *ret; | |
206 | size_t preserve_size; | |
207 | ||
208 | preserve_size = oldsize; | |
209 | if (preserve_size > newsize) | |
210 | preserve_size = newsize; | |
211 | tmp = malloc(preserve_size); | |
212 | if (tmp == NULL) | |
213 | return NULL; | |
214 | memcpy(tmp, ptr, preserve_size); | |
215 | ||
216 | munmap(ptr, oldsize); | |
217 | ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE, | |
218 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
219 | if (ret == MAP_FAILED) { | |
220 | free(tmp); | |
221 | return NULL; | |
222 | } | |
223 | memcpy(ret, tmp, preserve_size); | |
224 | free(tmp); | |
225 | return ret; | |
226 | #endif | |
2446536b | 227 | } |
228 | ||
229 | void plat_munmap(void *ptr, size_t size) | |
230 | { | |
231 | if (ptr != NULL) | |
232 | munmap(ptr, size); | |
233 | } | |
234 | ||
c25d78ee | 235 | int plat_mem_set_exec(void *ptr, size_t size) |
236 | { | |
e8b61936 | 237 | #ifdef _WIN32 |
238 | int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0); | |
239 | if (ret == 0) | |
240 | lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0); | |
241 | #else | |
242 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); | |
243 | if (ret != 0) | |
244 | lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno); | |
245 | #endif | |
c25d78ee | 246 | return ret; |
247 | } | |
248 | ||
2446536b | 249 | void emu_video_mode_change(int start_line, int line_count, int is_32cols) |
250 | { | |
251 | memset(vout_buf, 0, 320 * 240 * 2); | |
252 | vout_width = is_32cols ? 256 : 320; | |
253 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); | |
254 | } | |
255 | ||
256 | void emu_32x_startup(void) | |
257 | { | |
2446536b | 258 | } |
259 | ||
260 | #ifndef ANDROID | |
261 | ||
262 | void lprintf(const char *fmt, ...) | |
263 | { | |
264 | va_list list; | |
265 | ||
266 | va_start(list, fmt); | |
267 | fprintf(emu_log, "PicoDrive: "); | |
268 | vfprintf(emu_log, fmt, list); | |
269 | va_end(list); | |
270 | fflush(emu_log); | |
271 | } | |
272 | ||
273 | #else | |
274 | ||
275 | #include <android/log.h> | |
276 | ||
277 | void lprintf(const char *fmt, ...) | |
278 | { | |
279 | va_list list; | |
280 | ||
281 | va_start(list, fmt); | |
282 | __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list); | |
283 | va_end(list); | |
284 | } | |
285 | ||
286 | #endif | |
287 | ||
288 | /* libretro */ | |
289 | void retro_set_environment(retro_environment_t cb) | |
290 | { | |
291 | static const struct retro_variable vars[] = { | |
292 | //{ "region", "Region; Auto|NTSC|PAL" }, | |
531a8f38 | 293 | { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" }, |
294 | { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" }, | |
0185b677 | 295 | #ifdef DRC_SH2 |
296 | { "picodrive_drc", "Dynamic recompilers; enabled|disabled" }, | |
297 | #endif | |
2446536b | 298 | { NULL, NULL }, |
299 | }; | |
300 | ||
301 | environ_cb = cb; | |
302 | ||
303 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); | |
304 | } | |
305 | ||
306 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } | |
307 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } | |
308 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } | |
309 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } | |
310 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } | |
311 | ||
312 | unsigned retro_api_version(void) | |
313 | { | |
314 | return RETRO_API_VERSION; | |
315 | } | |
316 | ||
317 | void retro_set_controller_port_device(unsigned port, unsigned device) | |
318 | { | |
319 | } | |
320 | ||
321 | void retro_get_system_info(struct retro_system_info *info) | |
322 | { | |
323 | memset(info, 0, sizeof(*info)); | |
324 | info->library_name = "PicoDrive"; | |
325 | info->library_version = VERSION; | |
53b2e51c | 326 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
2446536b | 327 | info->need_fullpath = true; |
328 | } | |
329 | ||
330 | void retro_get_system_av_info(struct retro_system_av_info *info) | |
331 | { | |
332 | memset(info, 0, sizeof(*info)); | |
333 | info->timing.fps = Pico.m.pal ? 50 : 60; | |
334 | info->timing.sample_rate = 44100; | |
335 | info->geometry.base_width = 320; | |
336 | info->geometry.base_height = 240; | |
337 | info->geometry.max_width = VOUT_MAX_WIDTH; | |
338 | info->geometry.max_height = VOUT_MAX_HEIGHT; | |
339 | info->geometry.aspect_ratio = 4.0 / 3.0; | |
340 | } | |
341 | ||
86b38dc4 | 342 | /* savestates */ |
343 | struct savestate_state { | |
344 | const char *load_buf; | |
345 | char *save_buf; | |
346 | size_t size; | |
347 | size_t pos; | |
348 | }; | |
349 | ||
350 | size_t state_read(void *p, size_t size, size_t nmemb, void *file) | |
351 | { | |
352 | struct savestate_state *state = file; | |
353 | size_t bsize = size * nmemb; | |
354 | ||
355 | if (state->pos + bsize > state->size) { | |
356 | lprintf("savestate error: %u/%u\n", | |
357 | state->pos + bsize, state->size); | |
358 | bsize = state->size - state->pos; | |
359 | if ((int)bsize <= 0) | |
360 | return 0; | |
361 | } | |
362 | ||
363 | memcpy(p, state->load_buf + state->pos, bsize); | |
364 | state->pos += bsize; | |
365 | return bsize; | |
366 | } | |
367 | ||
368 | size_t state_write(void *p, size_t size, size_t nmemb, void *file) | |
369 | { | |
370 | struct savestate_state *state = file; | |
371 | size_t bsize = size * nmemb; | |
372 | ||
373 | if (state->pos + bsize > state->size) { | |
374 | lprintf("savestate error: %u/%u\n", | |
375 | state->pos + bsize, state->size); | |
376 | bsize = state->size - state->pos; | |
377 | if ((int)bsize <= 0) | |
378 | return 0; | |
379 | } | |
380 | ||
381 | memcpy(state->save_buf + state->pos, p, bsize); | |
382 | state->pos += bsize; | |
383 | return bsize; | |
384 | } | |
385 | ||
386 | size_t state_skip(void *p, size_t size, size_t nmemb, void *file) | |
387 | { | |
388 | struct savestate_state *state = file; | |
389 | size_t bsize = size * nmemb; | |
390 | ||
391 | state->pos += bsize; | |
392 | return bsize; | |
393 | } | |
394 | ||
395 | size_t state_eof(void *file) | |
396 | { | |
397 | struct savestate_state *state = file; | |
398 | ||
399 | return state->pos >= state->size; | |
400 | } | |
401 | ||
402 | int state_fseek(void *file, long offset, int whence) | |
403 | { | |
404 | struct savestate_state *state = file; | |
405 | ||
406 | switch (whence) { | |
407 | case SEEK_SET: | |
408 | state->pos = offset; | |
409 | break; | |
410 | case SEEK_CUR: | |
411 | state->pos += offset; | |
412 | break; | |
413 | case SEEK_END: | |
414 | state->pos = state->size + offset; | |
415 | break; | |
416 | } | |
417 | return (int)state->pos; | |
418 | } | |
419 | ||
420 | /* savestate sizes vary wildly depending if cd/32x or | |
421 | * carthw is active, so run the whole thing to get size */ | |
2446536b | 422 | size_t retro_serialize_size(void) |
423 | { | |
86b38dc4 | 424 | struct savestate_state state = { 0, }; |
425 | int ret; | |
426 | ||
427 | ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek); | |
428 | if (ret != 0) | |
429 | return 0; | |
430 | ||
431 | return state.pos; | |
2446536b | 432 | } |
433 | ||
434 | bool retro_serialize(void *data, size_t size) | |
435 | { | |
86b38dc4 | 436 | struct savestate_state state = { 0, }; |
437 | int ret; | |
438 | ||
439 | state.save_buf = data; | |
440 | state.size = size; | |
441 | state.pos = 0; | |
442 | ||
443 | ret = PicoStateFP(&state, 1, NULL, state_write, | |
444 | NULL, state_fseek); | |
445 | return ret == 0; | |
2446536b | 446 | } |
447 | ||
448 | bool retro_unserialize(const void *data, size_t size) | |
449 | { | |
86b38dc4 | 450 | struct savestate_state state = { 0, }; |
451 | int ret; | |
452 | ||
453 | state.load_buf = data; | |
454 | state.size = size; | |
455 | state.pos = 0; | |
456 | ||
457 | ret = PicoStateFP(&state, 0, state_read, NULL, | |
458 | state_eof, state_fseek); | |
459 | return ret == 0; | |
2446536b | 460 | } |
461 | ||
462 | /* cheats - TODO */ | |
463 | void retro_cheat_reset(void) | |
464 | { | |
465 | } | |
466 | ||
467 | void retro_cheat_set(unsigned index, bool enabled, const char *code) | |
468 | { | |
469 | } | |
470 | ||
471 | /* multidisk support */ | |
472 | static bool disk_ejected; | |
473 | static unsigned int disk_current_index; | |
474 | static unsigned int disk_count; | |
475 | static struct disks_state { | |
476 | char *fname; | |
477 | } disks[8]; | |
478 | ||
479 | static bool disk_set_eject_state(bool ejected) | |
480 | { | |
481 | // TODO? | |
482 | disk_ejected = ejected; | |
483 | return true; | |
484 | } | |
485 | ||
486 | static bool disk_get_eject_state(void) | |
487 | { | |
488 | return disk_ejected; | |
489 | } | |
490 | ||
491 | static unsigned int disk_get_image_index(void) | |
492 | { | |
493 | return disk_current_index; | |
494 | } | |
495 | ||
496 | static bool disk_set_image_index(unsigned int index) | |
497 | { | |
498 | cd_img_type cd_type; | |
499 | int ret; | |
500 | ||
501 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
502 | return false; | |
503 | ||
504 | if (disks[index].fname == NULL) { | |
505 | lprintf("missing disk #%u\n", index); | |
506 | ||
507 | // RetroArch specifies "no disk" with index == count, | |
508 | // so don't fail here.. | |
509 | disk_current_index = index; | |
510 | return true; | |
511 | } | |
512 | ||
513 | lprintf("switching to disk %u: \"%s\"\n", index, | |
514 | disks[index].fname); | |
515 | ||
516 | ret = -1; | |
517 | cd_type = PicoCdCheck(disks[index].fname, NULL); | |
518 | if (cd_type != CIT_NOT_CD) | |
519 | ret = Insert_CD(disks[index].fname, cd_type); | |
520 | if (ret != 0) { | |
521 | lprintf("Load failed, invalid CD image?\n"); | |
522 | return 0; | |
523 | } | |
524 | ||
525 | disk_current_index = index; | |
526 | return true; | |
527 | } | |
528 | ||
529 | static unsigned int disk_get_num_images(void) | |
530 | { | |
531 | return disk_count; | |
532 | } | |
533 | ||
534 | static bool disk_replace_image_index(unsigned index, | |
535 | const struct retro_game_info *info) | |
536 | { | |
537 | bool ret = true; | |
538 | ||
539 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
540 | return false; | |
541 | ||
542 | if (disks[index].fname != NULL) | |
543 | free(disks[index].fname); | |
544 | disks[index].fname = NULL; | |
545 | ||
546 | if (info != NULL) { | |
547 | disks[index].fname = strdup(info->path); | |
548 | if (index == disk_current_index) | |
549 | ret = disk_set_image_index(index); | |
550 | } | |
551 | ||
552 | return ret; | |
553 | } | |
554 | ||
555 | static bool disk_add_image_index(void) | |
556 | { | |
557 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) | |
558 | return false; | |
559 | ||
560 | disk_count++; | |
561 | return true; | |
562 | } | |
563 | ||
564 | static struct retro_disk_control_callback disk_control = { | |
565 | .set_eject_state = disk_set_eject_state, | |
566 | .get_eject_state = disk_get_eject_state, | |
567 | .get_image_index = disk_get_image_index, | |
568 | .set_image_index = disk_set_image_index, | |
569 | .get_num_images = disk_get_num_images, | |
570 | .replace_image_index = disk_replace_image_index, | |
571 | .add_image_index = disk_add_image_index, | |
572 | }; | |
573 | ||
574 | static void disk_tray_open(void) | |
575 | { | |
576 | lprintf("cd tray open\n"); | |
577 | disk_ejected = 1; | |
578 | } | |
579 | ||
580 | static void disk_tray_close(void) | |
581 | { | |
582 | lprintf("cd tray close\n"); | |
583 | disk_ejected = 0; | |
584 | } | |
585 | ||
586 | ||
587 | static const char * const biosfiles_us[] = { | |
588 | "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U" | |
589 | }; | |
590 | static const char * const biosfiles_eu[] = { | |
591 | "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E" | |
592 | }; | |
593 | static const char * const biosfiles_jp[] = { | |
594 | "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" | |
595 | }; | |
596 | ||
597 | static void make_system_path(char *buf, size_t buf_size, | |
598 | const char *name, const char *ext) | |
599 | { | |
600 | const char *dir = NULL; | |
601 | ||
602 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { | |
603 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); | |
604 | } | |
605 | else { | |
606 | snprintf(buf, buf_size, "%s%s", name, ext); | |
607 | } | |
608 | } | |
609 | ||
610 | static const char *find_bios(int *region, const char *cd_fname) | |
611 | { | |
612 | const char * const *files; | |
613 | static char path[256]; | |
614 | int i, count; | |
615 | FILE *f = NULL; | |
616 | ||
617 | if (*region == 4) { // US | |
618 | files = biosfiles_us; | |
619 | count = sizeof(biosfiles_us) / sizeof(char *); | |
620 | } else if (*region == 8) { // EU | |
621 | files = biosfiles_eu; | |
622 | count = sizeof(biosfiles_eu) / sizeof(char *); | |
623 | } else if (*region == 1 || *region == 2) { | |
624 | files = biosfiles_jp; | |
625 | count = sizeof(biosfiles_jp) / sizeof(char *); | |
626 | } else { | |
627 | return NULL; | |
628 | } | |
629 | ||
630 | for (i = 0; i < count; i++) | |
631 | { | |
632 | make_system_path(path, sizeof(path), files[i], ".bin"); | |
633 | f = fopen(path, "rb"); | |
634 | if (f != NULL) | |
635 | break; | |
636 | ||
637 | make_system_path(path, sizeof(path), files[i], ".zip"); | |
638 | f = fopen(path, "rb"); | |
639 | if (f != NULL) | |
640 | break; | |
641 | } | |
642 | ||
643 | if (f != NULL) { | |
644 | lprintf("using bios: %s\n", path); | |
645 | fclose(f); | |
646 | return path; | |
647 | } | |
648 | ||
649 | return NULL; | |
650 | } | |
651 | ||
652 | bool retro_load_game(const struct retro_game_info *info) | |
653 | { | |
654 | enum media_type_e media_type; | |
655 | static char carthw_path[256]; | |
656 | size_t i; | |
657 | ||
658 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; | |
659 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { | |
531a8f38 | 660 | lprintf("RGB565 support required, sorry\n"); |
2446536b | 661 | return false; |
662 | } | |
663 | ||
664 | if (info == NULL || info->path == NULL) { | |
665 | lprintf("info->path required\n"); | |
666 | return false; | |
667 | } | |
668 | ||
669 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { | |
670 | if (disks[i].fname != NULL) { | |
671 | free(disks[i].fname); | |
672 | disks[i].fname = NULL; | |
673 | } | |
674 | } | |
675 | ||
676 | disk_current_index = 0; | |
677 | disk_count = 1; | |
678 | disks[0].fname = strdup(info->path); | |
679 | ||
680 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); | |
681 | ||
682 | media_type = PicoLoadMedia(info->path, carthw_path, | |
683 | find_bios, NULL); | |
684 | ||
685 | switch (media_type) { | |
686 | case PM_BAD_DETECT: | |
687 | lprintf("Failed to detect ROM/CD image type.\n"); | |
688 | return false; | |
689 | case PM_BAD_CD: | |
690 | lprintf("Invalid CD image\n"); | |
691 | return false; | |
692 | case PM_BAD_CD_NO_BIOS: | |
693 | lprintf("Missing BIOS\n"); | |
694 | return false; | |
695 | case PM_ERROR: | |
696 | lprintf("Load error\n"); | |
697 | return false; | |
698 | default: | |
699 | break; | |
700 | } | |
701 | ||
702 | PicoLoopPrepare(); | |
703 | ||
704 | PicoWriteSound = snd_write; | |
705 | memset(sndBuffer, 0, sizeof(sndBuffer)); | |
706 | PsndOut = sndBuffer; | |
707 | PsndRerate(1); | |
708 | ||
709 | return true; | |
710 | } | |
711 | ||
712 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) | |
713 | { | |
714 | return false; | |
715 | } | |
716 | ||
717 | void retro_unload_game(void) | |
718 | { | |
719 | } | |
720 | ||
721 | unsigned retro_get_region(void) | |
722 | { | |
723 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; | |
724 | } | |
725 | ||
726 | void *retro_get_memory_data(unsigned id) | |
727 | { | |
728 | if (id != RETRO_MEMORY_SAVE_RAM) | |
729 | return NULL; | |
730 | ||
731 | if (PicoAHW & PAHW_MCD) | |
732 | return Pico_mcd->bram; | |
733 | else | |
734 | return SRam.data; | |
735 | } | |
736 | ||
737 | size_t retro_get_memory_size(unsigned id) | |
738 | { | |
739 | if (id != RETRO_MEMORY_SAVE_RAM) | |
740 | return 0; | |
741 | ||
742 | if (PicoAHW & PAHW_MCD) | |
743 | // bram | |
744 | return 0x2000; | |
745 | else | |
746 | return SRam.size; | |
747 | } | |
748 | ||
749 | void retro_reset(void) | |
750 | { | |
751 | PicoReset(); | |
752 | } | |
753 | ||
754 | static const unsigned short retro_pico_map[] = { | |
755 | [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, | |
756 | [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, | |
757 | [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, | |
758 | [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, | |
759 | [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, | |
760 | [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, | |
761 | [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, | |
762 | [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, | |
763 | [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, | |
764 | [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, | |
765 | [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, | |
766 | [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, | |
767 | }; | |
768 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) | |
769 | ||
770 | static void snd_write(int len) | |
771 | { | |
772 | audio_batch_cb(PsndOut, len / 4); | |
773 | } | |
774 | ||
531a8f38 | 775 | static enum input_device input_name_to_val(const char *name) |
776 | { | |
777 | if (strcmp(name, "3 button pad") == 0) | |
778 | return PICO_INPUT_PAD_3BTN; | |
779 | if (strcmp(name, "6 button pad") == 0) | |
780 | return PICO_INPUT_PAD_6BTN; | |
781 | if (strcmp(name, "None") == 0) | |
782 | return PICO_INPUT_NOTHING; | |
783 | ||
784 | lprintf("invalid picodrive_input: '%s'\n", name); | |
785 | return PICO_INPUT_PAD_3BTN; | |
786 | } | |
787 | ||
788 | static void update_variables(void) | |
789 | { | |
790 | struct retro_variable var; | |
791 | ||
792 | var.value = NULL; | |
793 | var.key = "picodrive_input1"; | |
794 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
795 | PicoSetInputDevice(0, input_name_to_val(var.value)); | |
796 | ||
797 | var.value = NULL; | |
798 | var.key = "picodrive_input2"; | |
799 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
800 | PicoSetInputDevice(1, input_name_to_val(var.value)); | |
0185b677 | 801 | |
802 | #ifdef DRC_SH2 | |
803 | var.value = NULL; | |
804 | var.key = "picodrive_drc"; | |
805 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
806 | if (strcmp(var.value, "enabled") == 0) | |
807 | PicoOpt |= POPT_EN_DRC; | |
808 | else | |
809 | PicoOpt &= ~POPT_EN_DRC; | |
810 | } | |
811 | #endif | |
531a8f38 | 812 | } |
813 | ||
2446536b | 814 | void retro_run(void) |
815 | { | |
816 | bool updated = false; | |
817 | int pad, i; | |
818 | ||
819 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) | |
531a8f38 | 820 | update_variables(); |
2446536b | 821 | |
822 | input_poll_cb(); | |
823 | ||
824 | PicoPad[0] = PicoPad[1] = 0; | |
825 | for (pad = 0; pad < 2; pad++) | |
826 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) | |
827 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) | |
828 | PicoPad[pad] |= retro_pico_map[i]; | |
829 | ||
830 | PicoFrame(); | |
831 | ||
832 | video_cb(vout_buf, vout_width, vout_height, vout_width * 2); | |
833 | } | |
834 | ||
835 | void retro_init(void) | |
836 | { | |
837 | int level; | |
838 | ||
839 | #ifdef IOS | |
840 | emu_log = fopen("/User/Documents/PicoDrive.log", "w"); | |
841 | if (emu_log == NULL) | |
842 | emu_log = fopen("PicoDrive.log", "w"); | |
843 | if (emu_log == NULL) | |
844 | #endif | |
845 | emu_log = stdout; | |
846 | ||
847 | level = 0; | |
848 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); | |
849 | ||
850 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); | |
851 | ||
852 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 | |
720bfc5d | 853 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
854 | | POPT_EN_32X|POPT_EN_PWM | |
855 | | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER; | |
856 | #ifdef __arm__ | |
92dfd9af | 857 | PicoOpt |= POPT_EN_DRC; |
720bfc5d | 858 | #endif |
2446536b | 859 | PsndRate = 44100; |
860 | PicoAutoRgnOrder = 0x184; // US, EU, JP | |
861 | PicoCDBuffers = 0; | |
862 | ||
2446536b | 863 | vout_width = 320; |
864 | vout_height = 240; | |
865 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); | |
866 | ||
867 | PicoInit(); | |
41946d70 | 868 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
2446536b | 869 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
870 | ||
871 | //PicoMessage = plat_status_msg_busy_next; | |
872 | PicoMCDopenTray = disk_tray_open; | |
873 | PicoMCDcloseTray = disk_tray_close; | |
531a8f38 | 874 | |
875 | update_variables(); | |
2446536b | 876 | } |
877 | ||
878 | void retro_deinit(void) | |
879 | { | |
880 | PicoExit(); | |
881 | } |