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 | ||
f5d4045b | 31 | static retro_log_printf_t log_cb; |
2446536b | 32 | static retro_video_refresh_t video_cb; |
33 | static retro_input_poll_t input_poll_cb; | |
34 | static retro_input_state_t input_state_cb; | |
35 | static retro_environment_t environ_cb; | |
36 | static retro_audio_sample_batch_t audio_batch_cb; | |
37 | ||
2446536b | 38 | #define VOUT_MAX_WIDTH 320 |
39 | #define VOUT_MAX_HEIGHT 240 | |
40 | static void *vout_buf; | |
51c08950 | 41 | static int vout_width, vout_height, vout_offset; |
2446536b | 42 | |
43 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; | |
44 | ||
2446536b | 45 | static void snd_write(int len); |
46 | ||
47 | #ifdef _WIN32 | |
48 | #define SLASH '\\' | |
49 | #else | |
50 | #define SLASH '/' | |
51 | #endif | |
52 | ||
53 | /* functions called by the core */ | |
54 | ||
55 | void cache_flush_d_inval_i(void *start, void *end) | |
56 | { | |
57 | #ifdef __arm__ | |
58 | #if defined(__BLACKBERRY_QNX__) | |
59 | msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE); | |
60 | #elif defined(__MACH__) | |
61 | size_t len = (char *)end - (char *)start; | |
62 | sys_dcache_flush(start, len); | |
63 | sys_icache_invalidate(start, len); | |
64 | #else | |
65 | __clear_cache(start, end); | |
66 | #endif | |
67 | #endif | |
68 | } | |
69 | ||
e8b61936 | 70 | #ifdef _WIN32 |
6f1133bc T |
71 | /* mmap() replacement for Windows |
72 | * | |
73 | * Author: Mike Frysinger <vapier@gentoo.org> | |
74 | * Placed into the public domain | |
75 | */ | |
76 | ||
77 | /* References: | |
78 | * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx | |
79 | * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx | |
80 | * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx | |
81 | * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx | |
82 | */ | |
83 | ||
84 | #define PROT_READ 0x1 | |
85 | #define PROT_WRITE 0x2 | |
86 | /* This flag is only available in WinXP+ */ | |
87 | #ifdef FILE_MAP_EXECUTE | |
88 | #define PROT_EXEC 0x4 | |
89 | #else | |
90 | #define PROT_EXEC 0x0 | |
91 | #define FILE_MAP_EXECUTE 0 | |
92 | #endif | |
93 | ||
94 | #define MAP_SHARED 0x01 | |
95 | #define MAP_PRIVATE 0x02 | |
96 | #define MAP_ANONYMOUS 0x20 | |
97 | #define MAP_ANON MAP_ANONYMOUS | |
98 | #define MAP_FAILED ((void *) -1) | |
99 | ||
100 | #ifdef __USE_FILE_OFFSET64 | |
101 | # define DWORD_HI(x) (x >> 32) | |
102 | # define DWORD_LO(x) ((x) & 0xffffffff) | |
103 | #else | |
104 | # define DWORD_HI(x) (0) | |
105 | # define DWORD_LO(x) (x) | |
106 | #endif | |
107 | ||
108 | static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset) | |
2446536b | 109 | { |
6f1133bc T |
110 | if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) |
111 | return MAP_FAILED; | |
112 | if (fd == -1) { | |
113 | if (!(flags & MAP_ANON) || offset) | |
114 | return MAP_FAILED; | |
115 | } else if (flags & MAP_ANON) | |
116 | return MAP_FAILED; | |
117 | ||
118 | DWORD flProtect; | |
119 | if (prot & PROT_WRITE) { | |
120 | if (prot & PROT_EXEC) | |
121 | flProtect = PAGE_EXECUTE_READWRITE; | |
122 | else | |
123 | flProtect = PAGE_READWRITE; | |
124 | } else if (prot & PROT_EXEC) { | |
125 | if (prot & PROT_READ) | |
126 | flProtect = PAGE_EXECUTE_READ; | |
127 | else if (prot & PROT_EXEC) | |
128 | flProtect = PAGE_EXECUTE; | |
129 | } else | |
130 | flProtect = PAGE_READONLY; | |
131 | ||
132 | off_t end = length + offset; | |
133 | HANDLE mmap_fd, h; | |
134 | if (fd == -1) | |
135 | mmap_fd = INVALID_HANDLE_VALUE; | |
136 | else | |
137 | mmap_fd = (HANDLE)_get_osfhandle(fd); | |
138 | h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL); | |
139 | if (h == NULL) | |
140 | return MAP_FAILED; | |
141 | ||
142 | DWORD dwDesiredAccess; | |
143 | if (prot & PROT_WRITE) | |
144 | dwDesiredAccess = FILE_MAP_WRITE; | |
145 | else | |
146 | dwDesiredAccess = FILE_MAP_READ; | |
147 | if (prot & PROT_EXEC) | |
148 | dwDesiredAccess |= FILE_MAP_EXECUTE; | |
149 | if (flags & MAP_PRIVATE) | |
150 | dwDesiredAccess |= FILE_MAP_COPY; | |
151 | void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length); | |
152 | if (ret == NULL) { | |
153 | CloseHandle(h); | |
154 | ret = MAP_FAILED; | |
155 | } | |
156 | return ret; | |
e8b61936 | 157 | } |
2446536b | 158 | |
6f1133bc | 159 | static void munmap(void *addr, size_t length) |
e8b61936 | 160 | { |
6f1133bc T |
161 | UnmapViewOfFile(addr); |
162 | /* ruh-ro, we leaked handle from CreateFileMapping() ... */ | |
e8b61936 | 163 | } |
e8b61936 | 164 | #endif |
8e5639bc | 165 | |
166 | #ifndef MAP_ANONYMOUS | |
167 | #define MAP_ANONYMOUS MAP_ANON | |
168 | #endif | |
169 | ||
e8b61936 | 170 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
171 | { | |
e8b61936 | 172 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
173 | void *req, *ret; | |
174 | ||
175 | req = (void *)addr; | |
176 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
177 | if (ret == MAP_FAILED) { | |
f5d4045b | 178 | if (log_cb) |
179 | log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno); | |
e8b61936 | 180 | return NULL; |
181 | } | |
182 | ||
183 | if (addr != 0 && ret != (void *)addr) { | |
f5d4045b | 184 | if (log_cb) |
185 | log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n", | |
186 | addr, ret); | |
e8b61936 | 187 | |
188 | if (is_fixed) { | |
189 | munmap(ret, size); | |
190 | return NULL; | |
191 | } | |
192 | } | |
2446536b | 193 | |
194 | return ret; | |
195 | } | |
196 | ||
197 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) | |
198 | { | |
8c8b7284 | 199 | #ifdef __linux__ |
2446536b | 200 | void *ret = mremap(ptr, oldsize, newsize, 0); |
201 | if (ret == MAP_FAILED) | |
202 | return NULL; | |
203 | ||
204 | return ret; | |
8c8b7284 | 205 | #else |
206 | void *tmp, *ret; | |
207 | size_t preserve_size; | |
208 | ||
209 | preserve_size = oldsize; | |
210 | if (preserve_size > newsize) | |
211 | preserve_size = newsize; | |
212 | tmp = malloc(preserve_size); | |
213 | if (tmp == NULL) | |
214 | return NULL; | |
215 | memcpy(tmp, ptr, preserve_size); | |
216 | ||
217 | munmap(ptr, oldsize); | |
218 | ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE, | |
219 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
220 | if (ret == MAP_FAILED) { | |
221 | free(tmp); | |
222 | return NULL; | |
223 | } | |
224 | memcpy(ret, tmp, preserve_size); | |
225 | free(tmp); | |
226 | return ret; | |
227 | #endif | |
2446536b | 228 | } |
229 | ||
230 | void plat_munmap(void *ptr, size_t size) | |
231 | { | |
232 | if (ptr != NULL) | |
233 | munmap(ptr, size); | |
234 | } | |
235 | ||
c25d78ee | 236 | int plat_mem_set_exec(void *ptr, size_t size) |
237 | { | |
e8b61936 | 238 | #ifdef _WIN32 |
239 | int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0); | |
f5d4045b | 240 | if (ret == 0 && log_cb) |
241 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0); | |
e8b61936 | 242 | #else |
243 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); | |
f5d4045b | 244 | if (ret != 0 && log_cb) |
245 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno); | |
e8b61936 | 246 | #endif |
c25d78ee | 247 | return ret; |
248 | } | |
249 | ||
2446536b | 250 | void emu_video_mode_change(int start_line, int line_count, int is_32cols) |
251 | { | |
252 | memset(vout_buf, 0, 320 * 240 * 2); | |
253 | vout_width = is_32cols ? 256 : 320; | |
254 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); | |
51c08950 | 255 | |
256 | vout_height = line_count; | |
257 | vout_offset = vout_width * start_line; | |
2446536b | 258 | } |
259 | ||
260 | void emu_32x_startup(void) | |
261 | { | |
2446536b | 262 | } |
263 | ||
2446536b | 264 | void lprintf(const char *fmt, ...) |
265 | { | |
f5d4045b | 266 | /* TODO - add 'level' param for warning/error messages? */ |
267 | if (log_cb) | |
268 | log_cb(RETRO_LOG_INFO, fmt); | |
2446536b | 269 | } |
270 | ||
2446536b | 271 | /* libretro */ |
272 | void retro_set_environment(retro_environment_t cb) | |
273 | { | |
274 | static const struct retro_variable vars[] = { | |
275 | //{ "region", "Region; Auto|NTSC|PAL" }, | |
531a8f38 | 276 | { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" }, |
277 | { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" }, | |
27f190ea | 278 | { "picodrive_sprlim", "No sprite limit; disabled|enabled" }, |
279 | { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" }, | |
0185b677 | 280 | #ifdef DRC_SH2 |
281 | { "picodrive_drc", "Dynamic recompilers; enabled|disabled" }, | |
282 | #endif | |
2446536b | 283 | { NULL, NULL }, |
284 | }; | |
285 | ||
286 | environ_cb = cb; | |
287 | ||
288 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); | |
289 | } | |
290 | ||
291 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } | |
292 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } | |
293 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } | |
294 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } | |
295 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } | |
296 | ||
297 | unsigned retro_api_version(void) | |
298 | { | |
299 | return RETRO_API_VERSION; | |
300 | } | |
301 | ||
302 | void retro_set_controller_port_device(unsigned port, unsigned device) | |
303 | { | |
304 | } | |
305 | ||
306 | void retro_get_system_info(struct retro_system_info *info) | |
307 | { | |
308 | memset(info, 0, sizeof(*info)); | |
309 | info->library_name = "PicoDrive"; | |
310 | info->library_version = VERSION; | |
53b2e51c | 311 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
2446536b | 312 | info->need_fullpath = true; |
313 | } | |
314 | ||
315 | void retro_get_system_av_info(struct retro_system_av_info *info) | |
316 | { | |
317 | memset(info, 0, sizeof(*info)); | |
318 | info->timing.fps = Pico.m.pal ? 50 : 60; | |
319 | info->timing.sample_rate = 44100; | |
320 | info->geometry.base_width = 320; | |
51c08950 | 321 | info->geometry.base_height = vout_height; |
2446536b | 322 | info->geometry.max_width = VOUT_MAX_WIDTH; |
323 | info->geometry.max_height = VOUT_MAX_HEIGHT; | |
51c08950 | 324 | info->geometry.aspect_ratio = 0.0f; |
2446536b | 325 | } |
326 | ||
86b38dc4 | 327 | /* savestates */ |
328 | struct savestate_state { | |
329 | const char *load_buf; | |
330 | char *save_buf; | |
331 | size_t size; | |
332 | size_t pos; | |
333 | }; | |
334 | ||
335 | size_t state_read(void *p, size_t size, size_t nmemb, void *file) | |
336 | { | |
337 | struct savestate_state *state = file; | |
338 | size_t bsize = size * nmemb; | |
339 | ||
340 | if (state->pos + bsize > state->size) { | |
f5d4045b | 341 | if (log_cb) |
342 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", | |
343 | state->pos + bsize, state->size); | |
86b38dc4 | 344 | bsize = state->size - state->pos; |
345 | if ((int)bsize <= 0) | |
346 | return 0; | |
347 | } | |
348 | ||
349 | memcpy(p, state->load_buf + state->pos, bsize); | |
350 | state->pos += bsize; | |
351 | return bsize; | |
352 | } | |
353 | ||
354 | size_t state_write(void *p, size_t size, size_t nmemb, void *file) | |
355 | { | |
356 | struct savestate_state *state = file; | |
357 | size_t bsize = size * nmemb; | |
358 | ||
359 | if (state->pos + bsize > state->size) { | |
f5d4045b | 360 | if (log_cb) |
361 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", | |
362 | state->pos + bsize, state->size); | |
86b38dc4 | 363 | bsize = state->size - state->pos; |
364 | if ((int)bsize <= 0) | |
365 | return 0; | |
366 | } | |
367 | ||
368 | memcpy(state->save_buf + state->pos, p, bsize); | |
369 | state->pos += bsize; | |
370 | return bsize; | |
371 | } | |
372 | ||
373 | size_t state_skip(void *p, size_t size, size_t nmemb, void *file) | |
374 | { | |
375 | struct savestate_state *state = file; | |
376 | size_t bsize = size * nmemb; | |
377 | ||
378 | state->pos += bsize; | |
379 | return bsize; | |
380 | } | |
381 | ||
382 | size_t state_eof(void *file) | |
383 | { | |
384 | struct savestate_state *state = file; | |
385 | ||
386 | return state->pos >= state->size; | |
387 | } | |
388 | ||
389 | int state_fseek(void *file, long offset, int whence) | |
390 | { | |
391 | struct savestate_state *state = file; | |
392 | ||
393 | switch (whence) { | |
394 | case SEEK_SET: | |
395 | state->pos = offset; | |
396 | break; | |
397 | case SEEK_CUR: | |
398 | state->pos += offset; | |
399 | break; | |
400 | case SEEK_END: | |
401 | state->pos = state->size + offset; | |
402 | break; | |
403 | } | |
404 | return (int)state->pos; | |
405 | } | |
406 | ||
407 | /* savestate sizes vary wildly depending if cd/32x or | |
408 | * carthw is active, so run the whole thing to get size */ | |
2446536b | 409 | size_t retro_serialize_size(void) |
410 | { | |
86b38dc4 | 411 | struct savestate_state state = { 0, }; |
412 | int ret; | |
413 | ||
414 | ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek); | |
415 | if (ret != 0) | |
416 | return 0; | |
417 | ||
418 | return state.pos; | |
2446536b | 419 | } |
420 | ||
421 | bool retro_serialize(void *data, size_t size) | |
422 | { | |
86b38dc4 | 423 | struct savestate_state state = { 0, }; |
424 | int ret; | |
425 | ||
426 | state.save_buf = data; | |
427 | state.size = size; | |
428 | state.pos = 0; | |
429 | ||
430 | ret = PicoStateFP(&state, 1, NULL, state_write, | |
431 | NULL, state_fseek); | |
432 | return ret == 0; | |
2446536b | 433 | } |
434 | ||
435 | bool retro_unserialize(const void *data, size_t size) | |
436 | { | |
86b38dc4 | 437 | struct savestate_state state = { 0, }; |
438 | int ret; | |
439 | ||
440 | state.load_buf = data; | |
441 | state.size = size; | |
442 | state.pos = 0; | |
443 | ||
444 | ret = PicoStateFP(&state, 0, state_read, NULL, | |
445 | state_eof, state_fseek); | |
446 | return ret == 0; | |
2446536b | 447 | } |
448 | ||
449 | /* cheats - TODO */ | |
450 | void retro_cheat_reset(void) | |
451 | { | |
452 | } | |
453 | ||
454 | void retro_cheat_set(unsigned index, bool enabled, const char *code) | |
455 | { | |
456 | } | |
457 | ||
458 | /* multidisk support */ | |
459 | static bool disk_ejected; | |
460 | static unsigned int disk_current_index; | |
461 | static unsigned int disk_count; | |
462 | static struct disks_state { | |
463 | char *fname; | |
464 | } disks[8]; | |
465 | ||
466 | static bool disk_set_eject_state(bool ejected) | |
467 | { | |
468 | // TODO? | |
469 | disk_ejected = ejected; | |
470 | return true; | |
471 | } | |
472 | ||
473 | static bool disk_get_eject_state(void) | |
474 | { | |
475 | return disk_ejected; | |
476 | } | |
477 | ||
478 | static unsigned int disk_get_image_index(void) | |
479 | { | |
480 | return disk_current_index; | |
481 | } | |
482 | ||
483 | static bool disk_set_image_index(unsigned int index) | |
484 | { | |
274fcc35 | 485 | enum cd_img_type cd_type; |
2446536b | 486 | int ret; |
487 | ||
488 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
489 | return false; | |
490 | ||
491 | if (disks[index].fname == NULL) { | |
f5d4045b | 492 | if (log_cb) |
493 | log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index); | |
2446536b | 494 | |
495 | // RetroArch specifies "no disk" with index == count, | |
496 | // so don't fail here.. | |
497 | disk_current_index = index; | |
498 | return true; | |
499 | } | |
500 | ||
f5d4045b | 501 | if (log_cb) |
502 | log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index, | |
503 | disks[index].fname); | |
2446536b | 504 | |
505 | ret = -1; | |
506 | cd_type = PicoCdCheck(disks[index].fname, NULL); | |
507 | if (cd_type != CIT_NOT_CD) | |
274fcc35 | 508 | ret = cdd_load(disks[index].fname, cd_type); |
2446536b | 509 | if (ret != 0) { |
f5d4045b | 510 | if (log_cb) |
511 | log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n"); | |
2446536b | 512 | return 0; |
513 | } | |
514 | ||
515 | disk_current_index = index; | |
516 | return true; | |
517 | } | |
518 | ||
519 | static unsigned int disk_get_num_images(void) | |
520 | { | |
521 | return disk_count; | |
522 | } | |
523 | ||
524 | static bool disk_replace_image_index(unsigned index, | |
525 | const struct retro_game_info *info) | |
526 | { | |
527 | bool ret = true; | |
528 | ||
529 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
530 | return false; | |
531 | ||
532 | if (disks[index].fname != NULL) | |
533 | free(disks[index].fname); | |
534 | disks[index].fname = NULL; | |
535 | ||
536 | if (info != NULL) { | |
537 | disks[index].fname = strdup(info->path); | |
538 | if (index == disk_current_index) | |
539 | ret = disk_set_image_index(index); | |
540 | } | |
541 | ||
542 | return ret; | |
543 | } | |
544 | ||
545 | static bool disk_add_image_index(void) | |
546 | { | |
547 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) | |
548 | return false; | |
549 | ||
550 | disk_count++; | |
551 | return true; | |
552 | } | |
553 | ||
554 | static struct retro_disk_control_callback disk_control = { | |
555 | .set_eject_state = disk_set_eject_state, | |
556 | .get_eject_state = disk_get_eject_state, | |
557 | .get_image_index = disk_get_image_index, | |
558 | .set_image_index = disk_set_image_index, | |
559 | .get_num_images = disk_get_num_images, | |
560 | .replace_image_index = disk_replace_image_index, | |
561 | .add_image_index = disk_add_image_index, | |
562 | }; | |
563 | ||
564 | static void disk_tray_open(void) | |
565 | { | |
f5d4045b | 566 | if (log_cb) |
567 | log_cb(RETRO_LOG_INFO, "cd tray open\n"); | |
2446536b | 568 | disk_ejected = 1; |
569 | } | |
570 | ||
571 | static void disk_tray_close(void) | |
572 | { | |
f5d4045b | 573 | if (log_cb) |
574 | log_cb(RETRO_LOG_INFO, "cd tray close\n"); | |
2446536b | 575 | disk_ejected = 0; |
576 | } | |
577 | ||
578 | ||
579 | static const char * const biosfiles_us[] = { | |
b08a2950 | 580 | "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U" |
2446536b | 581 | }; |
582 | static const char * const biosfiles_eu[] = { | |
b08a2950 | 583 | "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E" |
2446536b | 584 | }; |
585 | static const char * const biosfiles_jp[] = { | |
b08a2950 | 586 | "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
2446536b | 587 | }; |
588 | ||
589 | static void make_system_path(char *buf, size_t buf_size, | |
590 | const char *name, const char *ext) | |
591 | { | |
592 | const char *dir = NULL; | |
593 | ||
594 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { | |
595 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); | |
596 | } | |
597 | else { | |
598 | snprintf(buf, buf_size, "%s%s", name, ext); | |
599 | } | |
600 | } | |
601 | ||
602 | static const char *find_bios(int *region, const char *cd_fname) | |
603 | { | |
604 | const char * const *files; | |
605 | static char path[256]; | |
606 | int i, count; | |
607 | FILE *f = NULL; | |
608 | ||
609 | if (*region == 4) { // US | |
610 | files = biosfiles_us; | |
611 | count = sizeof(biosfiles_us) / sizeof(char *); | |
612 | } else if (*region == 8) { // EU | |
613 | files = biosfiles_eu; | |
614 | count = sizeof(biosfiles_eu) / sizeof(char *); | |
615 | } else if (*region == 1 || *region == 2) { | |
616 | files = biosfiles_jp; | |
617 | count = sizeof(biosfiles_jp) / sizeof(char *); | |
618 | } else { | |
619 | return NULL; | |
620 | } | |
621 | ||
622 | for (i = 0; i < count; i++) | |
623 | { | |
624 | make_system_path(path, sizeof(path), files[i], ".bin"); | |
625 | f = fopen(path, "rb"); | |
626 | if (f != NULL) | |
627 | break; | |
628 | ||
629 | make_system_path(path, sizeof(path), files[i], ".zip"); | |
630 | f = fopen(path, "rb"); | |
631 | if (f != NULL) | |
632 | break; | |
633 | } | |
634 | ||
635 | if (f != NULL) { | |
f5d4045b | 636 | if (log_cb) |
637 | log_cb(RETRO_LOG_INFO, "using bios: %s\n", path); | |
2446536b | 638 | fclose(f); |
639 | return path; | |
640 | } | |
641 | ||
642 | return NULL; | |
643 | } | |
644 | ||
645 | bool retro_load_game(const struct retro_game_info *info) | |
646 | { | |
647 | enum media_type_e media_type; | |
648 | static char carthw_path[256]; | |
649 | size_t i; | |
650 | ||
651 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; | |
652 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { | |
f5d4045b | 653 | if (log_cb) |
654 | log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n"); | |
2446536b | 655 | return false; |
656 | } | |
657 | ||
658 | if (info == NULL || info->path == NULL) { | |
f5d4045b | 659 | if (log_cb) |
660 | log_cb(RETRO_LOG_ERROR, "info->path required\n"); | |
2446536b | 661 | return false; |
662 | } | |
663 | ||
664 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { | |
665 | if (disks[i].fname != NULL) { | |
666 | free(disks[i].fname); | |
667 | disks[i].fname = NULL; | |
668 | } | |
669 | } | |
670 | ||
671 | disk_current_index = 0; | |
672 | disk_count = 1; | |
673 | disks[0].fname = strdup(info->path); | |
674 | ||
675 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); | |
676 | ||
677 | media_type = PicoLoadMedia(info->path, carthw_path, | |
678 | find_bios, NULL); | |
679 | ||
680 | switch (media_type) { | |
681 | case PM_BAD_DETECT: | |
f5d4045b | 682 | if (log_cb) |
683 | log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n"); | |
2446536b | 684 | return false; |
685 | case PM_BAD_CD: | |
f5d4045b | 686 | if (log_cb) |
687 | log_cb(RETRO_LOG_ERROR, "Invalid CD image\n"); | |
2446536b | 688 | return false; |
689 | case PM_BAD_CD_NO_BIOS: | |
f5d4045b | 690 | if (log_cb) |
691 | log_cb(RETRO_LOG_ERROR, "Missing BIOS\n"); | |
2446536b | 692 | return false; |
693 | case PM_ERROR: | |
f5d4045b | 694 | if (log_cb) |
695 | log_cb(RETRO_LOG_ERROR, "Load error\n"); | |
2446536b | 696 | return false; |
697 | default: | |
698 | break; | |
699 | } | |
700 | ||
701 | PicoLoopPrepare(); | |
702 | ||
703 | PicoWriteSound = snd_write; | |
704 | memset(sndBuffer, 0, sizeof(sndBuffer)); | |
705 | PsndOut = sndBuffer; | |
27f190ea | 706 | PsndRerate(0); |
2446536b | 707 | |
708 | return true; | |
709 | } | |
710 | ||
711 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) | |
712 | { | |
713 | return false; | |
714 | } | |
715 | ||
716 | void retro_unload_game(void) | |
717 | { | |
718 | } | |
719 | ||
720 | unsigned retro_get_region(void) | |
721 | { | |
722 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; | |
723 | } | |
724 | ||
725 | void *retro_get_memory_data(unsigned id) | |
726 | { | |
727 | if (id != RETRO_MEMORY_SAVE_RAM) | |
728 | return NULL; | |
729 | ||
730 | if (PicoAHW & PAHW_MCD) | |
731 | return Pico_mcd->bram; | |
732 | else | |
733 | return SRam.data; | |
734 | } | |
735 | ||
736 | size_t retro_get_memory_size(unsigned id) | |
737 | { | |
0fd6751d | 738 | unsigned int i; |
739 | int sum; | |
740 | ||
2446536b | 741 | if (id != RETRO_MEMORY_SAVE_RAM) |
742 | return 0; | |
743 | ||
744 | if (PicoAHW & PAHW_MCD) | |
745 | // bram | |
746 | return 0x2000; | |
0fd6751d | 747 | |
748 | if (Pico.m.frame_count == 0) | |
2446536b | 749 | return SRam.size; |
0fd6751d | 750 | |
751 | // if game doesn't write to sram, don't report it to | |
752 | // libretro so that RA doesn't write out zeroed .srm | |
753 | for (i = 0, sum = 0; i < SRam.size; i++) | |
754 | sum |= SRam.data[i]; | |
755 | ||
756 | return (sum != 0) ? SRam.size : 0; | |
2446536b | 757 | } |
758 | ||
759 | void retro_reset(void) | |
760 | { | |
761 | PicoReset(); | |
762 | } | |
763 | ||
764 | static const unsigned short retro_pico_map[] = { | |
765 | [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, | |
766 | [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, | |
767 | [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, | |
768 | [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, | |
769 | [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, | |
770 | [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, | |
771 | [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, | |
772 | [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, | |
773 | [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, | |
774 | [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, | |
775 | [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, | |
776 | [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, | |
777 | }; | |
778 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) | |
779 | ||
780 | static void snd_write(int len) | |
781 | { | |
782 | audio_batch_cb(PsndOut, len / 4); | |
783 | } | |
784 | ||
531a8f38 | 785 | static enum input_device input_name_to_val(const char *name) |
786 | { | |
787 | if (strcmp(name, "3 button pad") == 0) | |
788 | return PICO_INPUT_PAD_3BTN; | |
789 | if (strcmp(name, "6 button pad") == 0) | |
790 | return PICO_INPUT_PAD_6BTN; | |
791 | if (strcmp(name, "None") == 0) | |
792 | return PICO_INPUT_NOTHING; | |
793 | ||
f5d4045b | 794 | if (log_cb) |
795 | log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name); | |
531a8f38 | 796 | return PICO_INPUT_PAD_3BTN; |
797 | } | |
798 | ||
799 | static void update_variables(void) | |
800 | { | |
801 | struct retro_variable var; | |
802 | ||
803 | var.value = NULL; | |
804 | var.key = "picodrive_input1"; | |
805 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
806 | PicoSetInputDevice(0, input_name_to_val(var.value)); | |
807 | ||
808 | var.value = NULL; | |
809 | var.key = "picodrive_input2"; | |
810 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
811 | PicoSetInputDevice(1, input_name_to_val(var.value)); | |
0185b677 | 812 | |
27f190ea | 813 | var.value = NULL; |
814 | var.key = "picodrive_sprlim"; | |
815 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
816 | if (strcmp(var.value, "enabled") == 0) | |
817 | PicoOpt |= POPT_DIS_SPRITE_LIM; | |
818 | else | |
819 | PicoOpt &= ~POPT_DIS_SPRITE_LIM; | |
820 | } | |
821 | ||
822 | var.value = NULL; | |
823 | var.key = "picodrive_ramcart"; | |
824 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
825 | if (strcmp(var.value, "enabled") == 0) | |
826 | PicoOpt |= POPT_EN_MCD_RAMCART; | |
827 | else | |
828 | PicoOpt &= ~POPT_EN_MCD_RAMCART; | |
829 | } | |
830 | ||
0185b677 | 831 | #ifdef DRC_SH2 |
832 | var.value = NULL; | |
833 | var.key = "picodrive_drc"; | |
834 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
835 | if (strcmp(var.value, "enabled") == 0) | |
836 | PicoOpt |= POPT_EN_DRC; | |
837 | else | |
838 | PicoOpt &= ~POPT_EN_DRC; | |
839 | } | |
840 | #endif | |
531a8f38 | 841 | } |
842 | ||
2446536b | 843 | void retro_run(void) |
844 | { | |
845 | bool updated = false; | |
846 | int pad, i; | |
847 | ||
848 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) | |
531a8f38 | 849 | update_variables(); |
2446536b | 850 | |
851 | input_poll_cb(); | |
852 | ||
853 | PicoPad[0] = PicoPad[1] = 0; | |
854 | for (pad = 0; pad < 2; pad++) | |
855 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) | |
856 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) | |
857 | PicoPad[pad] |= retro_pico_map[i]; | |
858 | ||
859 | PicoFrame(); | |
860 | ||
51c08950 | 861 | video_cb((short *)vout_buf + vout_offset, |
862 | vout_width, vout_height, vout_width * 2); | |
2446536b | 863 | } |
864 | ||
865 | void retro_init(void) | |
866 | { | |
f5d4045b | 867 | struct retro_log_callback log; |
2446536b | 868 | int level; |
869 | ||
2446536b | 870 | level = 0; |
871 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); | |
872 | ||
f5d4045b | 873 | environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log); |
874 | if (log.log) | |
875 | log_cb = log.log; | |
876 | ||
2446536b | 877 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); |
878 | ||
879 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 | |
720bfc5d | 880 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
881 | | POPT_EN_32X|POPT_EN_PWM | |
882 | | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER; | |
883 | #ifdef __arm__ | |
92dfd9af | 884 | PicoOpt |= POPT_EN_DRC; |
720bfc5d | 885 | #endif |
2446536b | 886 | PsndRate = 44100; |
887 | PicoAutoRgnOrder = 0x184; // US, EU, JP | |
2446536b | 888 | |
2446536b | 889 | vout_width = 320; |
890 | vout_height = 240; | |
891 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); | |
892 | ||
893 | PicoInit(); | |
41946d70 | 894 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
2446536b | 895 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
896 | ||
897 | //PicoMessage = plat_status_msg_busy_next; | |
898 | PicoMCDopenTray = disk_tray_open; | |
899 | PicoMCDcloseTray = disk_tray_close; | |
531a8f38 | 900 | |
901 | update_variables(); | |
2446536b | 902 | } |
903 | ||
904 | void retro_deinit(void) | |
905 | { | |
906 | PicoExit(); | |
907 | } |