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; | |
51c08950 | 42 | static int vout_width, vout_height, vout_offset; |
2446536b | 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); | |
51c08950 | 254 | |
255 | vout_height = line_count; | |
256 | vout_offset = vout_width * start_line; | |
2446536b | 257 | } |
258 | ||
259 | void emu_32x_startup(void) | |
260 | { | |
2446536b | 261 | } |
262 | ||
263 | #ifndef ANDROID | |
264 | ||
265 | void lprintf(const char *fmt, ...) | |
266 | { | |
267 | va_list list; | |
268 | ||
269 | va_start(list, fmt); | |
270 | fprintf(emu_log, "PicoDrive: "); | |
271 | vfprintf(emu_log, fmt, list); | |
272 | va_end(list); | |
273 | fflush(emu_log); | |
274 | } | |
275 | ||
276 | #else | |
277 | ||
278 | #include <android/log.h> | |
279 | ||
280 | void lprintf(const char *fmt, ...) | |
281 | { | |
282 | va_list list; | |
283 | ||
284 | va_start(list, fmt); | |
285 | __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list); | |
286 | va_end(list); | |
287 | } | |
288 | ||
289 | #endif | |
290 | ||
291 | /* libretro */ | |
292 | void retro_set_environment(retro_environment_t cb) | |
293 | { | |
294 | static const struct retro_variable vars[] = { | |
295 | //{ "region", "Region; Auto|NTSC|PAL" }, | |
531a8f38 | 296 | { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" }, |
297 | { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" }, | |
27f190ea | 298 | { "picodrive_sprlim", "No sprite limit; disabled|enabled" }, |
299 | { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" }, | |
0185b677 | 300 | #ifdef DRC_SH2 |
301 | { "picodrive_drc", "Dynamic recompilers; enabled|disabled" }, | |
302 | #endif | |
2446536b | 303 | { NULL, NULL }, |
304 | }; | |
305 | ||
306 | environ_cb = cb; | |
307 | ||
308 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); | |
309 | } | |
310 | ||
311 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } | |
312 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } | |
313 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } | |
314 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } | |
315 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } | |
316 | ||
317 | unsigned retro_api_version(void) | |
318 | { | |
319 | return RETRO_API_VERSION; | |
320 | } | |
321 | ||
322 | void retro_set_controller_port_device(unsigned port, unsigned device) | |
323 | { | |
324 | } | |
325 | ||
326 | void retro_get_system_info(struct retro_system_info *info) | |
327 | { | |
328 | memset(info, 0, sizeof(*info)); | |
329 | info->library_name = "PicoDrive"; | |
330 | info->library_version = VERSION; | |
53b2e51c | 331 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
2446536b | 332 | info->need_fullpath = true; |
333 | } | |
334 | ||
335 | void retro_get_system_av_info(struct retro_system_av_info *info) | |
336 | { | |
337 | memset(info, 0, sizeof(*info)); | |
338 | info->timing.fps = Pico.m.pal ? 50 : 60; | |
339 | info->timing.sample_rate = 44100; | |
340 | info->geometry.base_width = 320; | |
51c08950 | 341 | info->geometry.base_height = vout_height; |
2446536b | 342 | info->geometry.max_width = VOUT_MAX_WIDTH; |
343 | info->geometry.max_height = VOUT_MAX_HEIGHT; | |
51c08950 | 344 | info->geometry.aspect_ratio = 0.0f; |
2446536b | 345 | } |
346 | ||
86b38dc4 | 347 | /* savestates */ |
348 | struct savestate_state { | |
349 | const char *load_buf; | |
350 | char *save_buf; | |
351 | size_t size; | |
352 | size_t pos; | |
353 | }; | |
354 | ||
355 | size_t state_read(void *p, size_t size, size_t nmemb, void *file) | |
356 | { | |
357 | struct savestate_state *state = file; | |
358 | size_t bsize = size * nmemb; | |
359 | ||
360 | if (state->pos + bsize > state->size) { | |
361 | lprintf("savestate error: %u/%u\n", | |
362 | state->pos + bsize, state->size); | |
363 | bsize = state->size - state->pos; | |
364 | if ((int)bsize <= 0) | |
365 | return 0; | |
366 | } | |
367 | ||
368 | memcpy(p, state->load_buf + state->pos, bsize); | |
369 | state->pos += bsize; | |
370 | return bsize; | |
371 | } | |
372 | ||
373 | size_t state_write(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 | if (state->pos + bsize > state->size) { | |
379 | lprintf("savestate error: %u/%u\n", | |
380 | state->pos + bsize, state->size); | |
381 | bsize = state->size - state->pos; | |
382 | if ((int)bsize <= 0) | |
383 | return 0; | |
384 | } | |
385 | ||
386 | memcpy(state->save_buf + state->pos, p, bsize); | |
387 | state->pos += bsize; | |
388 | return bsize; | |
389 | } | |
390 | ||
391 | size_t state_skip(void *p, size_t size, size_t nmemb, void *file) | |
392 | { | |
393 | struct savestate_state *state = file; | |
394 | size_t bsize = size * nmemb; | |
395 | ||
396 | state->pos += bsize; | |
397 | return bsize; | |
398 | } | |
399 | ||
400 | size_t state_eof(void *file) | |
401 | { | |
402 | struct savestate_state *state = file; | |
403 | ||
404 | return state->pos >= state->size; | |
405 | } | |
406 | ||
407 | int state_fseek(void *file, long offset, int whence) | |
408 | { | |
409 | struct savestate_state *state = file; | |
410 | ||
411 | switch (whence) { | |
412 | case SEEK_SET: | |
413 | state->pos = offset; | |
414 | break; | |
415 | case SEEK_CUR: | |
416 | state->pos += offset; | |
417 | break; | |
418 | case SEEK_END: | |
419 | state->pos = state->size + offset; | |
420 | break; | |
421 | } | |
422 | return (int)state->pos; | |
423 | } | |
424 | ||
425 | /* savestate sizes vary wildly depending if cd/32x or | |
426 | * carthw is active, so run the whole thing to get size */ | |
2446536b | 427 | size_t retro_serialize_size(void) |
428 | { | |
86b38dc4 | 429 | struct savestate_state state = { 0, }; |
430 | int ret; | |
431 | ||
432 | ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek); | |
433 | if (ret != 0) | |
434 | return 0; | |
435 | ||
436 | return state.pos; | |
2446536b | 437 | } |
438 | ||
439 | bool retro_serialize(void *data, size_t size) | |
440 | { | |
86b38dc4 | 441 | struct savestate_state state = { 0, }; |
442 | int ret; | |
443 | ||
444 | state.save_buf = data; | |
445 | state.size = size; | |
446 | state.pos = 0; | |
447 | ||
448 | ret = PicoStateFP(&state, 1, NULL, state_write, | |
449 | NULL, state_fseek); | |
450 | return ret == 0; | |
2446536b | 451 | } |
452 | ||
453 | bool retro_unserialize(const void *data, size_t size) | |
454 | { | |
86b38dc4 | 455 | struct savestate_state state = { 0, }; |
456 | int ret; | |
457 | ||
458 | state.load_buf = data; | |
459 | state.size = size; | |
460 | state.pos = 0; | |
461 | ||
462 | ret = PicoStateFP(&state, 0, state_read, NULL, | |
463 | state_eof, state_fseek); | |
464 | return ret == 0; | |
2446536b | 465 | } |
466 | ||
467 | /* cheats - TODO */ | |
468 | void retro_cheat_reset(void) | |
469 | { | |
470 | } | |
471 | ||
472 | void retro_cheat_set(unsigned index, bool enabled, const char *code) | |
473 | { | |
474 | } | |
475 | ||
476 | /* multidisk support */ | |
477 | static bool disk_ejected; | |
478 | static unsigned int disk_current_index; | |
479 | static unsigned int disk_count; | |
480 | static struct disks_state { | |
481 | char *fname; | |
482 | } disks[8]; | |
483 | ||
484 | static bool disk_set_eject_state(bool ejected) | |
485 | { | |
486 | // TODO? | |
487 | disk_ejected = ejected; | |
488 | return true; | |
489 | } | |
490 | ||
491 | static bool disk_get_eject_state(void) | |
492 | { | |
493 | return disk_ejected; | |
494 | } | |
495 | ||
496 | static unsigned int disk_get_image_index(void) | |
497 | { | |
498 | return disk_current_index; | |
499 | } | |
500 | ||
501 | static bool disk_set_image_index(unsigned int index) | |
502 | { | |
274fcc35 | 503 | enum cd_img_type cd_type; |
2446536b | 504 | int ret; |
505 | ||
506 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
507 | return false; | |
508 | ||
509 | if (disks[index].fname == NULL) { | |
510 | lprintf("missing disk #%u\n", index); | |
511 | ||
512 | // RetroArch specifies "no disk" with index == count, | |
513 | // so don't fail here.. | |
514 | disk_current_index = index; | |
515 | return true; | |
516 | } | |
517 | ||
518 | lprintf("switching to disk %u: \"%s\"\n", index, | |
519 | disks[index].fname); | |
520 | ||
521 | ret = -1; | |
522 | cd_type = PicoCdCheck(disks[index].fname, NULL); | |
523 | if (cd_type != CIT_NOT_CD) | |
274fcc35 | 524 | ret = cdd_load(disks[index].fname, cd_type); |
2446536b | 525 | if (ret != 0) { |
526 | lprintf("Load failed, invalid CD image?\n"); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | disk_current_index = index; | |
531 | return true; | |
532 | } | |
533 | ||
534 | static unsigned int disk_get_num_images(void) | |
535 | { | |
536 | return disk_count; | |
537 | } | |
538 | ||
539 | static bool disk_replace_image_index(unsigned index, | |
540 | const struct retro_game_info *info) | |
541 | { | |
542 | bool ret = true; | |
543 | ||
544 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
545 | return false; | |
546 | ||
547 | if (disks[index].fname != NULL) | |
548 | free(disks[index].fname); | |
549 | disks[index].fname = NULL; | |
550 | ||
551 | if (info != NULL) { | |
552 | disks[index].fname = strdup(info->path); | |
553 | if (index == disk_current_index) | |
554 | ret = disk_set_image_index(index); | |
555 | } | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
560 | static bool disk_add_image_index(void) | |
561 | { | |
562 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) | |
563 | return false; | |
564 | ||
565 | disk_count++; | |
566 | return true; | |
567 | } | |
568 | ||
569 | static struct retro_disk_control_callback disk_control = { | |
570 | .set_eject_state = disk_set_eject_state, | |
571 | .get_eject_state = disk_get_eject_state, | |
572 | .get_image_index = disk_get_image_index, | |
573 | .set_image_index = disk_set_image_index, | |
574 | .get_num_images = disk_get_num_images, | |
575 | .replace_image_index = disk_replace_image_index, | |
576 | .add_image_index = disk_add_image_index, | |
577 | }; | |
578 | ||
579 | static void disk_tray_open(void) | |
580 | { | |
581 | lprintf("cd tray open\n"); | |
582 | disk_ejected = 1; | |
583 | } | |
584 | ||
585 | static void disk_tray_close(void) | |
586 | { | |
587 | lprintf("cd tray close\n"); | |
588 | disk_ejected = 0; | |
589 | } | |
590 | ||
591 | ||
592 | static const char * const biosfiles_us[] = { | |
b08a2950 | 593 | "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U" |
2446536b | 594 | }; |
595 | static const char * const biosfiles_eu[] = { | |
b08a2950 | 596 | "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E" |
2446536b | 597 | }; |
598 | static const char * const biosfiles_jp[] = { | |
b08a2950 | 599 | "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
2446536b | 600 | }; |
601 | ||
602 | static void make_system_path(char *buf, size_t buf_size, | |
603 | const char *name, const char *ext) | |
604 | { | |
605 | const char *dir = NULL; | |
606 | ||
607 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { | |
608 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); | |
609 | } | |
610 | else { | |
611 | snprintf(buf, buf_size, "%s%s", name, ext); | |
612 | } | |
613 | } | |
614 | ||
615 | static const char *find_bios(int *region, const char *cd_fname) | |
616 | { | |
617 | const char * const *files; | |
618 | static char path[256]; | |
619 | int i, count; | |
620 | FILE *f = NULL; | |
621 | ||
622 | if (*region == 4) { // US | |
623 | files = biosfiles_us; | |
624 | count = sizeof(biosfiles_us) / sizeof(char *); | |
625 | } else if (*region == 8) { // EU | |
626 | files = biosfiles_eu; | |
627 | count = sizeof(biosfiles_eu) / sizeof(char *); | |
628 | } else if (*region == 1 || *region == 2) { | |
629 | files = biosfiles_jp; | |
630 | count = sizeof(biosfiles_jp) / sizeof(char *); | |
631 | } else { | |
632 | return NULL; | |
633 | } | |
634 | ||
635 | for (i = 0; i < count; i++) | |
636 | { | |
637 | make_system_path(path, sizeof(path), files[i], ".bin"); | |
638 | f = fopen(path, "rb"); | |
639 | if (f != NULL) | |
640 | break; | |
641 | ||
642 | make_system_path(path, sizeof(path), files[i], ".zip"); | |
643 | f = fopen(path, "rb"); | |
644 | if (f != NULL) | |
645 | break; | |
646 | } | |
647 | ||
648 | if (f != NULL) { | |
649 | lprintf("using bios: %s\n", path); | |
650 | fclose(f); | |
651 | return path; | |
652 | } | |
653 | ||
654 | return NULL; | |
655 | } | |
656 | ||
657 | bool retro_load_game(const struct retro_game_info *info) | |
658 | { | |
659 | enum media_type_e media_type; | |
660 | static char carthw_path[256]; | |
661 | size_t i; | |
662 | ||
663 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; | |
664 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { | |
531a8f38 | 665 | lprintf("RGB565 support required, sorry\n"); |
2446536b | 666 | return false; |
667 | } | |
668 | ||
669 | if (info == NULL || info->path == NULL) { | |
670 | lprintf("info->path required\n"); | |
671 | return false; | |
672 | } | |
673 | ||
674 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { | |
675 | if (disks[i].fname != NULL) { | |
676 | free(disks[i].fname); | |
677 | disks[i].fname = NULL; | |
678 | } | |
679 | } | |
680 | ||
681 | disk_current_index = 0; | |
682 | disk_count = 1; | |
683 | disks[0].fname = strdup(info->path); | |
684 | ||
685 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); | |
686 | ||
687 | media_type = PicoLoadMedia(info->path, carthw_path, | |
688 | find_bios, NULL); | |
689 | ||
690 | switch (media_type) { | |
691 | case PM_BAD_DETECT: | |
692 | lprintf("Failed to detect ROM/CD image type.\n"); | |
693 | return false; | |
694 | case PM_BAD_CD: | |
695 | lprintf("Invalid CD image\n"); | |
696 | return false; | |
697 | case PM_BAD_CD_NO_BIOS: | |
698 | lprintf("Missing BIOS\n"); | |
699 | return false; | |
700 | case PM_ERROR: | |
701 | lprintf("Load error\n"); | |
702 | return false; | |
703 | default: | |
704 | break; | |
705 | } | |
706 | ||
707 | PicoLoopPrepare(); | |
708 | ||
709 | PicoWriteSound = snd_write; | |
710 | memset(sndBuffer, 0, sizeof(sndBuffer)); | |
711 | PsndOut = sndBuffer; | |
27f190ea | 712 | PsndRerate(0); |
2446536b | 713 | |
714 | return true; | |
715 | } | |
716 | ||
717 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) | |
718 | { | |
719 | return false; | |
720 | } | |
721 | ||
722 | void retro_unload_game(void) | |
723 | { | |
724 | } | |
725 | ||
726 | unsigned retro_get_region(void) | |
727 | { | |
728 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; | |
729 | } | |
730 | ||
731 | void *retro_get_memory_data(unsigned id) | |
732 | { | |
733 | if (id != RETRO_MEMORY_SAVE_RAM) | |
734 | return NULL; | |
735 | ||
736 | if (PicoAHW & PAHW_MCD) | |
737 | return Pico_mcd->bram; | |
738 | else | |
739 | return SRam.data; | |
740 | } | |
741 | ||
742 | size_t retro_get_memory_size(unsigned id) | |
743 | { | |
0fd6751d | 744 | unsigned int i; |
745 | int sum; | |
746 | ||
2446536b | 747 | if (id != RETRO_MEMORY_SAVE_RAM) |
748 | return 0; | |
749 | ||
750 | if (PicoAHW & PAHW_MCD) | |
751 | // bram | |
752 | return 0x2000; | |
0fd6751d | 753 | |
754 | if (Pico.m.frame_count == 0) | |
2446536b | 755 | return SRam.size; |
0fd6751d | 756 | |
757 | // if game doesn't write to sram, don't report it to | |
758 | // libretro so that RA doesn't write out zeroed .srm | |
759 | for (i = 0, sum = 0; i < SRam.size; i++) | |
760 | sum |= SRam.data[i]; | |
761 | ||
762 | return (sum != 0) ? SRam.size : 0; | |
2446536b | 763 | } |
764 | ||
765 | void retro_reset(void) | |
766 | { | |
767 | PicoReset(); | |
768 | } | |
769 | ||
770 | static const unsigned short retro_pico_map[] = { | |
771 | [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, | |
772 | [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, | |
773 | [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, | |
774 | [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, | |
775 | [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, | |
776 | [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, | |
777 | [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, | |
778 | [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, | |
779 | [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, | |
780 | [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, | |
781 | [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, | |
782 | [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, | |
783 | }; | |
784 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) | |
785 | ||
786 | static void snd_write(int len) | |
787 | { | |
788 | audio_batch_cb(PsndOut, len / 4); | |
789 | } | |
790 | ||
531a8f38 | 791 | static enum input_device input_name_to_val(const char *name) |
792 | { | |
793 | if (strcmp(name, "3 button pad") == 0) | |
794 | return PICO_INPUT_PAD_3BTN; | |
795 | if (strcmp(name, "6 button pad") == 0) | |
796 | return PICO_INPUT_PAD_6BTN; | |
797 | if (strcmp(name, "None") == 0) | |
798 | return PICO_INPUT_NOTHING; | |
799 | ||
800 | lprintf("invalid picodrive_input: '%s'\n", name); | |
801 | return PICO_INPUT_PAD_3BTN; | |
802 | } | |
803 | ||
804 | static void update_variables(void) | |
805 | { | |
806 | struct retro_variable var; | |
807 | ||
808 | var.value = NULL; | |
809 | var.key = "picodrive_input1"; | |
810 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
811 | PicoSetInputDevice(0, input_name_to_val(var.value)); | |
812 | ||
813 | var.value = NULL; | |
814 | var.key = "picodrive_input2"; | |
815 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
816 | PicoSetInputDevice(1, input_name_to_val(var.value)); | |
0185b677 | 817 | |
27f190ea | 818 | var.value = NULL; |
819 | var.key = "picodrive_sprlim"; | |
820 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
821 | if (strcmp(var.value, "enabled") == 0) | |
822 | PicoOpt |= POPT_DIS_SPRITE_LIM; | |
823 | else | |
824 | PicoOpt &= ~POPT_DIS_SPRITE_LIM; | |
825 | } | |
826 | ||
827 | var.value = NULL; | |
828 | var.key = "picodrive_ramcart"; | |
829 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
830 | if (strcmp(var.value, "enabled") == 0) | |
831 | PicoOpt |= POPT_EN_MCD_RAMCART; | |
832 | else | |
833 | PicoOpt &= ~POPT_EN_MCD_RAMCART; | |
834 | } | |
835 | ||
0185b677 | 836 | #ifdef DRC_SH2 |
837 | var.value = NULL; | |
838 | var.key = "picodrive_drc"; | |
839 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
840 | if (strcmp(var.value, "enabled") == 0) | |
841 | PicoOpt |= POPT_EN_DRC; | |
842 | else | |
843 | PicoOpt &= ~POPT_EN_DRC; | |
844 | } | |
845 | #endif | |
531a8f38 | 846 | } |
847 | ||
2446536b | 848 | void retro_run(void) |
849 | { | |
850 | bool updated = false; | |
851 | int pad, i; | |
852 | ||
853 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) | |
531a8f38 | 854 | update_variables(); |
2446536b | 855 | |
856 | input_poll_cb(); | |
857 | ||
858 | PicoPad[0] = PicoPad[1] = 0; | |
859 | for (pad = 0; pad < 2; pad++) | |
860 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) | |
861 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) | |
862 | PicoPad[pad] |= retro_pico_map[i]; | |
863 | ||
864 | PicoFrame(); | |
865 | ||
51c08950 | 866 | video_cb((short *)vout_buf + vout_offset, |
867 | vout_width, vout_height, vout_width * 2); | |
2446536b | 868 | } |
869 | ||
870 | void retro_init(void) | |
871 | { | |
872 | int level; | |
873 | ||
874 | #ifdef IOS | |
875 | emu_log = fopen("/User/Documents/PicoDrive.log", "w"); | |
876 | if (emu_log == NULL) | |
877 | emu_log = fopen("PicoDrive.log", "w"); | |
878 | if (emu_log == NULL) | |
879 | #endif | |
880 | emu_log = stdout; | |
881 | ||
882 | level = 0; | |
883 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); | |
884 | ||
885 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); | |
886 | ||
887 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 | |
720bfc5d | 888 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
889 | | POPT_EN_32X|POPT_EN_PWM | |
890 | | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER; | |
891 | #ifdef __arm__ | |
92dfd9af | 892 | PicoOpt |= POPT_EN_DRC; |
720bfc5d | 893 | #endif |
2446536b | 894 | PsndRate = 44100; |
895 | PicoAutoRgnOrder = 0x184; // US, EU, JP | |
2446536b | 896 | |
2446536b | 897 | vout_width = 320; |
898 | vout_height = 240; | |
899 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); | |
900 | ||
901 | PicoInit(); | |
41946d70 | 902 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
2446536b | 903 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
904 | ||
905 | //PicoMessage = plat_status_msg_busy_next; | |
906 | PicoMCDopenTray = disk_tray_open; | |
907 | PicoMCDcloseTray = disk_tray_close; | |
531a8f38 | 908 | |
909 | update_variables(); | |
2446536b | 910 | } |
911 | ||
912 | void retro_deinit(void) | |
913 | { | |
914 | PicoExit(); | |
915 | } |