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 | ||
f18d0e08 | 9 | #ifdef PSP |
10 | #define NO_MMAP | |
11 | #endif | |
12 | ||
2446536b | 13 | #define _GNU_SOURCE 1 // mremap |
14 | #include <stdio.h> | |
15 | #include <stdarg.h> | |
16 | #include <string.h> | |
e8b61936 | 17 | #ifndef _WIN32 |
f18d0e08 | 18 | #ifndef NO_MMAP |
2446536b | 19 | #include <sys/mman.h> |
f18d0e08 | 20 | #endif |
e8b61936 | 21 | #else |
6f1133bc | 22 | #include <io.h> |
e8b61936 | 23 | #include <windows.h> |
6f1133bc | 24 | #include <sys/types.h> |
e8b61936 | 25 | #endif |
c25d78ee | 26 | #include <errno.h> |
2446536b | 27 | #ifdef __MACH__ |
28 | #include <libkern/OSCacheControl.h> | |
29 | #endif | |
30 | ||
31 | #include <pico/pico_int.h> | |
86b38dc4 | 32 | #include <pico/state.h> |
2446536b | 33 | #include "common/input_pico.h" |
34 | #include "common/version.h" | |
35 | #include "libretro.h" | |
36 | ||
f5d4045b | 37 | static retro_log_printf_t log_cb; |
2446536b | 38 | static retro_video_refresh_t video_cb; |
39 | static retro_input_poll_t input_poll_cb; | |
40 | static retro_input_state_t input_state_cb; | |
41 | static retro_environment_t environ_cb; | |
42 | static retro_audio_sample_batch_t audio_batch_cb; | |
43 | ||
2446536b | 44 | #define VOUT_MAX_WIDTH 320 |
45 | #define VOUT_MAX_HEIGHT 240 | |
46 | static void *vout_buf; | |
51c08950 | 47 | static int vout_width, vout_height, vout_offset; |
2446536b | 48 | |
49 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; | |
50 | ||
2446536b | 51 | static void snd_write(int len); |
52 | ||
53 | #ifdef _WIN32 | |
54 | #define SLASH '\\' | |
55 | #else | |
56 | #define SLASH '/' | |
57 | #endif | |
58 | ||
59 | /* functions called by the core */ | |
60 | ||
61 | void cache_flush_d_inval_i(void *start, void *end) | |
62 | { | |
63 | #ifdef __arm__ | |
64 | #if defined(__BLACKBERRY_QNX__) | |
65 | msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE); | |
66 | #elif defined(__MACH__) | |
67 | size_t len = (char *)end - (char *)start; | |
68 | sys_dcache_flush(start, len); | |
69 | sys_icache_invalidate(start, len); | |
70 | #else | |
71 | __clear_cache(start, end); | |
72 | #endif | |
73 | #endif | |
74 | } | |
75 | ||
e8b61936 | 76 | #ifdef _WIN32 |
6f1133bc T |
77 | /* mmap() replacement for Windows |
78 | * | |
79 | * Author: Mike Frysinger <vapier@gentoo.org> | |
80 | * Placed into the public domain | |
81 | */ | |
82 | ||
83 | /* References: | |
84 | * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx | |
85 | * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx | |
86 | * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx | |
87 | * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx | |
88 | */ | |
89 | ||
90 | #define PROT_READ 0x1 | |
91 | #define PROT_WRITE 0x2 | |
92 | /* This flag is only available in WinXP+ */ | |
93 | #ifdef FILE_MAP_EXECUTE | |
94 | #define PROT_EXEC 0x4 | |
95 | #else | |
96 | #define PROT_EXEC 0x0 | |
97 | #define FILE_MAP_EXECUTE 0 | |
98 | #endif | |
99 | ||
100 | #define MAP_SHARED 0x01 | |
101 | #define MAP_PRIVATE 0x02 | |
102 | #define MAP_ANONYMOUS 0x20 | |
103 | #define MAP_ANON MAP_ANONYMOUS | |
104 | #define MAP_FAILED ((void *) -1) | |
105 | ||
106 | #ifdef __USE_FILE_OFFSET64 | |
107 | # define DWORD_HI(x) (x >> 32) | |
108 | # define DWORD_LO(x) ((x) & 0xffffffff) | |
109 | #else | |
110 | # define DWORD_HI(x) (0) | |
111 | # define DWORD_LO(x) (x) | |
112 | #endif | |
113 | ||
114 | static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset) | |
2446536b | 115 | { |
6f1133bc T |
116 | if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) |
117 | return MAP_FAILED; | |
118 | if (fd == -1) { | |
119 | if (!(flags & MAP_ANON) || offset) | |
120 | return MAP_FAILED; | |
121 | } else if (flags & MAP_ANON) | |
122 | return MAP_FAILED; | |
123 | ||
124 | DWORD flProtect; | |
125 | if (prot & PROT_WRITE) { | |
126 | if (prot & PROT_EXEC) | |
127 | flProtect = PAGE_EXECUTE_READWRITE; | |
128 | else | |
129 | flProtect = PAGE_READWRITE; | |
130 | } else if (prot & PROT_EXEC) { | |
131 | if (prot & PROT_READ) | |
132 | flProtect = PAGE_EXECUTE_READ; | |
133 | else if (prot & PROT_EXEC) | |
134 | flProtect = PAGE_EXECUTE; | |
135 | } else | |
136 | flProtect = PAGE_READONLY; | |
137 | ||
138 | off_t end = length + offset; | |
139 | HANDLE mmap_fd, h; | |
140 | if (fd == -1) | |
141 | mmap_fd = INVALID_HANDLE_VALUE; | |
142 | else | |
143 | mmap_fd = (HANDLE)_get_osfhandle(fd); | |
144 | h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL); | |
145 | if (h == NULL) | |
146 | return MAP_FAILED; | |
147 | ||
148 | DWORD dwDesiredAccess; | |
149 | if (prot & PROT_WRITE) | |
150 | dwDesiredAccess = FILE_MAP_WRITE; | |
151 | else | |
152 | dwDesiredAccess = FILE_MAP_READ; | |
153 | if (prot & PROT_EXEC) | |
154 | dwDesiredAccess |= FILE_MAP_EXECUTE; | |
155 | if (flags & MAP_PRIVATE) | |
156 | dwDesiredAccess |= FILE_MAP_COPY; | |
157 | void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length); | |
158 | if (ret == NULL) { | |
159 | CloseHandle(h); | |
160 | ret = MAP_FAILED; | |
161 | } | |
162 | return ret; | |
e8b61936 | 163 | } |
2446536b | 164 | |
6f1133bc | 165 | static void munmap(void *addr, size_t length) |
e8b61936 | 166 | { |
6f1133bc T |
167 | UnmapViewOfFile(addr); |
168 | /* ruh-ro, we leaked handle from CreateFileMapping() ... */ | |
e8b61936 | 169 | } |
f18d0e08 | 170 | #elif defined(NO_MMAP) |
171 | #define PROT_EXEC 0x04 | |
172 | #define MAP_FAILED 0 | |
173 | #define PROT_READ 0 | |
174 | #define PROT_WRITE 0 | |
175 | #define MAP_PRIVATE 0 | |
176 | #define MAP_ANONYMOUS 0 | |
177 | ||
178 | void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off) | |
179 | { | |
180 | return malloc(len); | |
181 | } | |
182 | ||
183 | void munmap(void *base_addr, size_t len) | |
184 | { | |
185 | free(base_addr); | |
186 | } | |
187 | ||
188 | int mprotect(void *addr, size_t len, int prot) | |
189 | { | |
190 | /* stub - not really needed at this point since this codepath has no dynarecs */ | |
191 | return 0; | |
192 | } | |
193 | ||
e8b61936 | 194 | #endif |
8e5639bc | 195 | |
196 | #ifndef MAP_ANONYMOUS | |
197 | #define MAP_ANONYMOUS MAP_ANON | |
198 | #endif | |
199 | ||
e8b61936 | 200 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
201 | { | |
e8b61936 | 202 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
203 | void *req, *ret; | |
204 | ||
205 | req = (void *)addr; | |
206 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
207 | if (ret == MAP_FAILED) { | |
f5d4045b | 208 | if (log_cb) |
209 | log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno); | |
e8b61936 | 210 | return NULL; |
211 | } | |
212 | ||
213 | if (addr != 0 && ret != (void *)addr) { | |
f5d4045b | 214 | if (log_cb) |
215 | log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n", | |
216 | addr, ret); | |
e8b61936 | 217 | |
218 | if (is_fixed) { | |
219 | munmap(ret, size); | |
220 | return NULL; | |
221 | } | |
222 | } | |
2446536b | 223 | |
224 | return ret; | |
225 | } | |
226 | ||
227 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) | |
228 | { | |
8c8b7284 | 229 | #ifdef __linux__ |
2446536b | 230 | void *ret = mremap(ptr, oldsize, newsize, 0); |
231 | if (ret == MAP_FAILED) | |
232 | return NULL; | |
233 | ||
234 | return ret; | |
8c8b7284 | 235 | #else |
236 | void *tmp, *ret; | |
237 | size_t preserve_size; | |
238 | ||
239 | preserve_size = oldsize; | |
240 | if (preserve_size > newsize) | |
241 | preserve_size = newsize; | |
242 | tmp = malloc(preserve_size); | |
243 | if (tmp == NULL) | |
244 | return NULL; | |
245 | memcpy(tmp, ptr, preserve_size); | |
246 | ||
247 | munmap(ptr, oldsize); | |
248 | ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE, | |
249 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
250 | if (ret == MAP_FAILED) { | |
251 | free(tmp); | |
252 | return NULL; | |
253 | } | |
254 | memcpy(ret, tmp, preserve_size); | |
255 | free(tmp); | |
256 | return ret; | |
257 | #endif | |
2446536b | 258 | } |
259 | ||
260 | void plat_munmap(void *ptr, size_t size) | |
261 | { | |
262 | if (ptr != NULL) | |
263 | munmap(ptr, size); | |
264 | } | |
265 | ||
c25d78ee | 266 | int plat_mem_set_exec(void *ptr, size_t size) |
267 | { | |
e8b61936 | 268 | #ifdef _WIN32 |
269 | int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0); | |
f5d4045b | 270 | if (ret == 0 && log_cb) |
271 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0); | |
e8b61936 | 272 | #else |
273 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); | |
f5d4045b | 274 | if (ret != 0 && log_cb) |
275 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno); | |
e8b61936 | 276 | #endif |
c25d78ee | 277 | return ret; |
278 | } | |
279 | ||
2446536b | 280 | void emu_video_mode_change(int start_line, int line_count, int is_32cols) |
281 | { | |
282 | memset(vout_buf, 0, 320 * 240 * 2); | |
283 | vout_width = is_32cols ? 256 : 320; | |
284 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); | |
51c08950 | 285 | |
286 | vout_height = line_count; | |
287 | vout_offset = vout_width * start_line; | |
2446536b | 288 | } |
289 | ||
290 | void emu_32x_startup(void) | |
291 | { | |
2446536b | 292 | } |
293 | ||
2446536b | 294 | void lprintf(const char *fmt, ...) |
295 | { | |
c681e48d | 296 | char buffer[256]; |
297 | va_list ap; | |
298 | va_start(ap, fmt); | |
299 | vsprintf(buffer, fmt, ap); | |
f5d4045b | 300 | /* TODO - add 'level' param for warning/error messages? */ |
301 | if (log_cb) | |
c681e48d | 302 | log_cb(RETRO_LOG_INFO, "%s\n", fmt); |
2446536b | 303 | } |
304 | ||
2446536b | 305 | /* libretro */ |
306 | void retro_set_environment(retro_environment_t cb) | |
307 | { | |
308 | static const struct retro_variable vars[] = { | |
309 | //{ "region", "Region; Auto|NTSC|PAL" }, | |
531a8f38 | 310 | { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" }, |
311 | { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" }, | |
27f190ea | 312 | { "picodrive_sprlim", "No sprite limit; disabled|enabled" }, |
313 | { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" }, | |
0185b677 | 314 | #ifdef DRC_SH2 |
315 | { "picodrive_drc", "Dynamic recompilers; enabled|disabled" }, | |
316 | #endif | |
2446536b | 317 | { NULL, NULL }, |
318 | }; | |
319 | ||
320 | environ_cb = cb; | |
321 | ||
322 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); | |
323 | } | |
324 | ||
325 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } | |
326 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } | |
327 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } | |
328 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } | |
329 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } | |
330 | ||
331 | unsigned retro_api_version(void) | |
332 | { | |
333 | return RETRO_API_VERSION; | |
334 | } | |
335 | ||
336 | void retro_set_controller_port_device(unsigned port, unsigned device) | |
337 | { | |
338 | } | |
339 | ||
340 | void retro_get_system_info(struct retro_system_info *info) | |
341 | { | |
342 | memset(info, 0, sizeof(*info)); | |
343 | info->library_name = "PicoDrive"; | |
344 | info->library_version = VERSION; | |
53b2e51c | 345 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
2446536b | 346 | info->need_fullpath = true; |
347 | } | |
348 | ||
349 | void retro_get_system_av_info(struct retro_system_av_info *info) | |
350 | { | |
351 | memset(info, 0, sizeof(*info)); | |
352 | info->timing.fps = Pico.m.pal ? 50 : 60; | |
353 | info->timing.sample_rate = 44100; | |
354 | info->geometry.base_width = 320; | |
51c08950 | 355 | info->geometry.base_height = vout_height; |
2446536b | 356 | info->geometry.max_width = VOUT_MAX_WIDTH; |
357 | info->geometry.max_height = VOUT_MAX_HEIGHT; | |
51c08950 | 358 | info->geometry.aspect_ratio = 0.0f; |
2446536b | 359 | } |
360 | ||
86b38dc4 | 361 | /* savestates */ |
362 | struct savestate_state { | |
363 | const char *load_buf; | |
364 | char *save_buf; | |
365 | size_t size; | |
366 | size_t pos; | |
367 | }; | |
368 | ||
369 | size_t state_read(void *p, size_t size, size_t nmemb, void *file) | |
370 | { | |
371 | struct savestate_state *state = file; | |
372 | size_t bsize = size * nmemb; | |
373 | ||
374 | if (state->pos + bsize > state->size) { | |
f5d4045b | 375 | if (log_cb) |
376 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", | |
377 | state->pos + bsize, state->size); | |
86b38dc4 | 378 | bsize = state->size - state->pos; |
379 | if ((int)bsize <= 0) | |
380 | return 0; | |
381 | } | |
382 | ||
383 | memcpy(p, state->load_buf + state->pos, bsize); | |
384 | state->pos += bsize; | |
385 | return bsize; | |
386 | } | |
387 | ||
388 | size_t state_write(void *p, size_t size, size_t nmemb, void *file) | |
389 | { | |
390 | struct savestate_state *state = file; | |
391 | size_t bsize = size * nmemb; | |
392 | ||
393 | if (state->pos + bsize > state->size) { | |
f5d4045b | 394 | if (log_cb) |
395 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", | |
396 | state->pos + bsize, state->size); | |
86b38dc4 | 397 | bsize = state->size - state->pos; |
398 | if ((int)bsize <= 0) | |
399 | return 0; | |
400 | } | |
401 | ||
402 | memcpy(state->save_buf + state->pos, p, bsize); | |
403 | state->pos += bsize; | |
404 | return bsize; | |
405 | } | |
406 | ||
407 | size_t state_skip(void *p, size_t size, size_t nmemb, void *file) | |
408 | { | |
409 | struct savestate_state *state = file; | |
410 | size_t bsize = size * nmemb; | |
411 | ||
412 | state->pos += bsize; | |
413 | return bsize; | |
414 | } | |
415 | ||
416 | size_t state_eof(void *file) | |
417 | { | |
418 | struct savestate_state *state = file; | |
419 | ||
420 | return state->pos >= state->size; | |
421 | } | |
422 | ||
423 | int state_fseek(void *file, long offset, int whence) | |
424 | { | |
425 | struct savestate_state *state = file; | |
426 | ||
427 | switch (whence) { | |
428 | case SEEK_SET: | |
429 | state->pos = offset; | |
430 | break; | |
431 | case SEEK_CUR: | |
432 | state->pos += offset; | |
433 | break; | |
434 | case SEEK_END: | |
435 | state->pos = state->size + offset; | |
436 | break; | |
437 | } | |
438 | return (int)state->pos; | |
439 | } | |
440 | ||
441 | /* savestate sizes vary wildly depending if cd/32x or | |
442 | * carthw is active, so run the whole thing to get size */ | |
2446536b | 443 | size_t retro_serialize_size(void) |
444 | { | |
86b38dc4 | 445 | struct savestate_state state = { 0, }; |
446 | int ret; | |
447 | ||
448 | ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek); | |
449 | if (ret != 0) | |
450 | return 0; | |
451 | ||
452 | return state.pos; | |
2446536b | 453 | } |
454 | ||
455 | bool retro_serialize(void *data, size_t size) | |
456 | { | |
86b38dc4 | 457 | struct savestate_state state = { 0, }; |
458 | int ret; | |
459 | ||
460 | state.save_buf = data; | |
461 | state.size = size; | |
462 | state.pos = 0; | |
463 | ||
464 | ret = PicoStateFP(&state, 1, NULL, state_write, | |
465 | NULL, state_fseek); | |
466 | return ret == 0; | |
2446536b | 467 | } |
468 | ||
469 | bool retro_unserialize(const void *data, size_t size) | |
470 | { | |
86b38dc4 | 471 | struct savestate_state state = { 0, }; |
472 | int ret; | |
473 | ||
474 | state.load_buf = data; | |
475 | state.size = size; | |
476 | state.pos = 0; | |
477 | ||
478 | ret = PicoStateFP(&state, 0, state_read, NULL, | |
479 | state_eof, state_fseek); | |
480 | return ret == 0; | |
2446536b | 481 | } |
482 | ||
483 | /* cheats - TODO */ | |
484 | void retro_cheat_reset(void) | |
485 | { | |
486 | } | |
487 | ||
488 | void retro_cheat_set(unsigned index, bool enabled, const char *code) | |
489 | { | |
490 | } | |
491 | ||
492 | /* multidisk support */ | |
493 | static bool disk_ejected; | |
494 | static unsigned int disk_current_index; | |
495 | static unsigned int disk_count; | |
496 | static struct disks_state { | |
497 | char *fname; | |
498 | } disks[8]; | |
499 | ||
500 | static bool disk_set_eject_state(bool ejected) | |
501 | { | |
502 | // TODO? | |
503 | disk_ejected = ejected; | |
504 | return true; | |
505 | } | |
506 | ||
507 | static bool disk_get_eject_state(void) | |
508 | { | |
509 | return disk_ejected; | |
510 | } | |
511 | ||
512 | static unsigned int disk_get_image_index(void) | |
513 | { | |
514 | return disk_current_index; | |
515 | } | |
516 | ||
517 | static bool disk_set_image_index(unsigned int index) | |
518 | { | |
274fcc35 | 519 | enum cd_img_type cd_type; |
2446536b | 520 | int ret; |
521 | ||
522 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
523 | return false; | |
524 | ||
525 | if (disks[index].fname == NULL) { | |
f5d4045b | 526 | if (log_cb) |
527 | log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index); | |
2446536b | 528 | |
529 | // RetroArch specifies "no disk" with index == count, | |
530 | // so don't fail here.. | |
531 | disk_current_index = index; | |
532 | return true; | |
533 | } | |
534 | ||
f5d4045b | 535 | if (log_cb) |
536 | log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index, | |
537 | disks[index].fname); | |
2446536b | 538 | |
539 | ret = -1; | |
540 | cd_type = PicoCdCheck(disks[index].fname, NULL); | |
541 | if (cd_type != CIT_NOT_CD) | |
274fcc35 | 542 | ret = cdd_load(disks[index].fname, cd_type); |
2446536b | 543 | if (ret != 0) { |
f5d4045b | 544 | if (log_cb) |
545 | log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n"); | |
2446536b | 546 | return 0; |
547 | } | |
548 | ||
549 | disk_current_index = index; | |
550 | return true; | |
551 | } | |
552 | ||
553 | static unsigned int disk_get_num_images(void) | |
554 | { | |
555 | return disk_count; | |
556 | } | |
557 | ||
558 | static bool disk_replace_image_index(unsigned index, | |
559 | const struct retro_game_info *info) | |
560 | { | |
561 | bool ret = true; | |
562 | ||
563 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
564 | return false; | |
565 | ||
566 | if (disks[index].fname != NULL) | |
567 | free(disks[index].fname); | |
568 | disks[index].fname = NULL; | |
569 | ||
570 | if (info != NULL) { | |
571 | disks[index].fname = strdup(info->path); | |
572 | if (index == disk_current_index) | |
573 | ret = disk_set_image_index(index); | |
574 | } | |
575 | ||
576 | return ret; | |
577 | } | |
578 | ||
579 | static bool disk_add_image_index(void) | |
580 | { | |
581 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) | |
582 | return false; | |
583 | ||
584 | disk_count++; | |
585 | return true; | |
586 | } | |
587 | ||
588 | static struct retro_disk_control_callback disk_control = { | |
589 | .set_eject_state = disk_set_eject_state, | |
590 | .get_eject_state = disk_get_eject_state, | |
591 | .get_image_index = disk_get_image_index, | |
592 | .set_image_index = disk_set_image_index, | |
593 | .get_num_images = disk_get_num_images, | |
594 | .replace_image_index = disk_replace_image_index, | |
595 | .add_image_index = disk_add_image_index, | |
596 | }; | |
597 | ||
598 | static void disk_tray_open(void) | |
599 | { | |
f5d4045b | 600 | if (log_cb) |
601 | log_cb(RETRO_LOG_INFO, "cd tray open\n"); | |
2446536b | 602 | disk_ejected = 1; |
603 | } | |
604 | ||
605 | static void disk_tray_close(void) | |
606 | { | |
f5d4045b | 607 | if (log_cb) |
608 | log_cb(RETRO_LOG_INFO, "cd tray close\n"); | |
2446536b | 609 | disk_ejected = 0; |
610 | } | |
611 | ||
612 | ||
613 | static const char * const biosfiles_us[] = { | |
b08a2950 | 614 | "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U" |
2446536b | 615 | }; |
616 | static const char * const biosfiles_eu[] = { | |
b08a2950 | 617 | "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E" |
2446536b | 618 | }; |
619 | static const char * const biosfiles_jp[] = { | |
b08a2950 | 620 | "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
2446536b | 621 | }; |
622 | ||
623 | static void make_system_path(char *buf, size_t buf_size, | |
624 | const char *name, const char *ext) | |
625 | { | |
626 | const char *dir = NULL; | |
627 | ||
628 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { | |
629 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); | |
630 | } | |
631 | else { | |
632 | snprintf(buf, buf_size, "%s%s", name, ext); | |
633 | } | |
634 | } | |
635 | ||
636 | static const char *find_bios(int *region, const char *cd_fname) | |
637 | { | |
638 | const char * const *files; | |
639 | static char path[256]; | |
640 | int i, count; | |
641 | FILE *f = NULL; | |
642 | ||
643 | if (*region == 4) { // US | |
644 | files = biosfiles_us; | |
645 | count = sizeof(biosfiles_us) / sizeof(char *); | |
646 | } else if (*region == 8) { // EU | |
647 | files = biosfiles_eu; | |
648 | count = sizeof(biosfiles_eu) / sizeof(char *); | |
649 | } else if (*region == 1 || *region == 2) { | |
650 | files = biosfiles_jp; | |
651 | count = sizeof(biosfiles_jp) / sizeof(char *); | |
652 | } else { | |
653 | return NULL; | |
654 | } | |
655 | ||
656 | for (i = 0; i < count; i++) | |
657 | { | |
658 | make_system_path(path, sizeof(path), files[i], ".bin"); | |
659 | f = fopen(path, "rb"); | |
660 | if (f != NULL) | |
661 | break; | |
662 | ||
663 | make_system_path(path, sizeof(path), files[i], ".zip"); | |
664 | f = fopen(path, "rb"); | |
665 | if (f != NULL) | |
666 | break; | |
667 | } | |
668 | ||
669 | if (f != NULL) { | |
f5d4045b | 670 | if (log_cb) |
671 | log_cb(RETRO_LOG_INFO, "using bios: %s\n", path); | |
2446536b | 672 | fclose(f); |
673 | return path; | |
674 | } | |
675 | ||
676 | return NULL; | |
677 | } | |
678 | ||
679 | bool retro_load_game(const struct retro_game_info *info) | |
680 | { | |
681 | enum media_type_e media_type; | |
682 | static char carthw_path[256]; | |
683 | size_t i; | |
684 | ||
685 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; | |
686 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { | |
f5d4045b | 687 | if (log_cb) |
688 | log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n"); | |
2446536b | 689 | return false; |
690 | } | |
691 | ||
692 | if (info == NULL || info->path == NULL) { | |
f5d4045b | 693 | if (log_cb) |
694 | log_cb(RETRO_LOG_ERROR, "info->path required\n"); | |
2446536b | 695 | return false; |
696 | } | |
697 | ||
698 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { | |
699 | if (disks[i].fname != NULL) { | |
700 | free(disks[i].fname); | |
701 | disks[i].fname = NULL; | |
702 | } | |
703 | } | |
704 | ||
705 | disk_current_index = 0; | |
706 | disk_count = 1; | |
707 | disks[0].fname = strdup(info->path); | |
708 | ||
709 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); | |
710 | ||
711 | media_type = PicoLoadMedia(info->path, carthw_path, | |
712 | find_bios, NULL); | |
713 | ||
714 | switch (media_type) { | |
715 | case PM_BAD_DETECT: | |
f5d4045b | 716 | if (log_cb) |
717 | log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n"); | |
2446536b | 718 | return false; |
719 | case PM_BAD_CD: | |
f5d4045b | 720 | if (log_cb) |
721 | log_cb(RETRO_LOG_ERROR, "Invalid CD image\n"); | |
2446536b | 722 | return false; |
723 | case PM_BAD_CD_NO_BIOS: | |
f5d4045b | 724 | if (log_cb) |
725 | log_cb(RETRO_LOG_ERROR, "Missing BIOS\n"); | |
2446536b | 726 | return false; |
727 | case PM_ERROR: | |
f5d4045b | 728 | if (log_cb) |
729 | log_cb(RETRO_LOG_ERROR, "Load error\n"); | |
2446536b | 730 | return false; |
731 | default: | |
732 | break; | |
733 | } | |
734 | ||
735 | PicoLoopPrepare(); | |
736 | ||
737 | PicoWriteSound = snd_write; | |
738 | memset(sndBuffer, 0, sizeof(sndBuffer)); | |
739 | PsndOut = sndBuffer; | |
27f190ea | 740 | PsndRerate(0); |
2446536b | 741 | |
742 | return true; | |
743 | } | |
744 | ||
745 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) | |
746 | { | |
747 | return false; | |
748 | } | |
749 | ||
750 | void retro_unload_game(void) | |
751 | { | |
752 | } | |
753 | ||
754 | unsigned retro_get_region(void) | |
755 | { | |
756 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; | |
757 | } | |
758 | ||
759 | void *retro_get_memory_data(unsigned id) | |
760 | { | |
761 | if (id != RETRO_MEMORY_SAVE_RAM) | |
762 | return NULL; | |
763 | ||
764 | if (PicoAHW & PAHW_MCD) | |
765 | return Pico_mcd->bram; | |
766 | else | |
767 | return SRam.data; | |
768 | } | |
769 | ||
770 | size_t retro_get_memory_size(unsigned id) | |
771 | { | |
0fd6751d | 772 | unsigned int i; |
773 | int sum; | |
774 | ||
2446536b | 775 | if (id != RETRO_MEMORY_SAVE_RAM) |
776 | return 0; | |
777 | ||
778 | if (PicoAHW & PAHW_MCD) | |
779 | // bram | |
780 | return 0x2000; | |
0fd6751d | 781 | |
782 | if (Pico.m.frame_count == 0) | |
2446536b | 783 | return SRam.size; |
0fd6751d | 784 | |
785 | // if game doesn't write to sram, don't report it to | |
786 | // libretro so that RA doesn't write out zeroed .srm | |
787 | for (i = 0, sum = 0; i < SRam.size; i++) | |
788 | sum |= SRam.data[i]; | |
789 | ||
790 | return (sum != 0) ? SRam.size : 0; | |
2446536b | 791 | } |
792 | ||
793 | void retro_reset(void) | |
794 | { | |
795 | PicoReset(); | |
796 | } | |
797 | ||
798 | static const unsigned short retro_pico_map[] = { | |
799 | [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, | |
800 | [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, | |
801 | [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, | |
802 | [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, | |
803 | [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, | |
804 | [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, | |
805 | [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, | |
806 | [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, | |
807 | [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, | |
808 | [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, | |
809 | [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, | |
810 | [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, | |
811 | }; | |
812 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) | |
813 | ||
814 | static void snd_write(int len) | |
815 | { | |
816 | audio_batch_cb(PsndOut, len / 4); | |
817 | } | |
818 | ||
531a8f38 | 819 | static enum input_device input_name_to_val(const char *name) |
820 | { | |
821 | if (strcmp(name, "3 button pad") == 0) | |
822 | return PICO_INPUT_PAD_3BTN; | |
823 | if (strcmp(name, "6 button pad") == 0) | |
824 | return PICO_INPUT_PAD_6BTN; | |
825 | if (strcmp(name, "None") == 0) | |
826 | return PICO_INPUT_NOTHING; | |
827 | ||
f5d4045b | 828 | if (log_cb) |
829 | log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name); | |
531a8f38 | 830 | return PICO_INPUT_PAD_3BTN; |
831 | } | |
832 | ||
833 | static void update_variables(void) | |
834 | { | |
835 | struct retro_variable var; | |
836 | ||
837 | var.value = NULL; | |
838 | var.key = "picodrive_input1"; | |
839 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
840 | PicoSetInputDevice(0, input_name_to_val(var.value)); | |
841 | ||
842 | var.value = NULL; | |
843 | var.key = "picodrive_input2"; | |
844 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
845 | PicoSetInputDevice(1, input_name_to_val(var.value)); | |
0185b677 | 846 | |
27f190ea | 847 | var.value = NULL; |
848 | var.key = "picodrive_sprlim"; | |
849 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
850 | if (strcmp(var.value, "enabled") == 0) | |
851 | PicoOpt |= POPT_DIS_SPRITE_LIM; | |
852 | else | |
853 | PicoOpt &= ~POPT_DIS_SPRITE_LIM; | |
854 | } | |
855 | ||
856 | var.value = NULL; | |
857 | var.key = "picodrive_ramcart"; | |
858 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
859 | if (strcmp(var.value, "enabled") == 0) | |
860 | PicoOpt |= POPT_EN_MCD_RAMCART; | |
861 | else | |
862 | PicoOpt &= ~POPT_EN_MCD_RAMCART; | |
863 | } | |
864 | ||
0185b677 | 865 | #ifdef DRC_SH2 |
866 | var.value = NULL; | |
867 | var.key = "picodrive_drc"; | |
868 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
869 | if (strcmp(var.value, "enabled") == 0) | |
870 | PicoOpt |= POPT_EN_DRC; | |
871 | else | |
872 | PicoOpt &= ~POPT_EN_DRC; | |
873 | } | |
874 | #endif | |
531a8f38 | 875 | } |
876 | ||
2446536b | 877 | void retro_run(void) |
878 | { | |
879 | bool updated = false; | |
880 | int pad, i; | |
881 | ||
882 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) | |
531a8f38 | 883 | update_variables(); |
2446536b | 884 | |
885 | input_poll_cb(); | |
886 | ||
887 | PicoPad[0] = PicoPad[1] = 0; | |
888 | for (pad = 0; pad < 2; pad++) | |
889 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) | |
890 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) | |
891 | PicoPad[pad] |= retro_pico_map[i]; | |
892 | ||
893 | PicoFrame(); | |
894 | ||
51c08950 | 895 | video_cb((short *)vout_buf + vout_offset, |
896 | vout_width, vout_height, vout_width * 2); | |
2446536b | 897 | } |
898 | ||
899 | void retro_init(void) | |
900 | { | |
f5d4045b | 901 | struct retro_log_callback log; |
2446536b | 902 | int level; |
903 | ||
2446536b | 904 | level = 0; |
905 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); | |
906 | ||
c681e48d | 907 | if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) |
f5d4045b | 908 | log_cb = log.log; |
c681e48d | 909 | else |
910 | log_cb = NULL; | |
f5d4045b | 911 | |
2446536b | 912 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); |
913 | ||
914 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 | |
720bfc5d | 915 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
916 | | POPT_EN_32X|POPT_EN_PWM | |
917 | | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER; | |
918 | #ifdef __arm__ | |
92dfd9af | 919 | PicoOpt |= POPT_EN_DRC; |
720bfc5d | 920 | #endif |
2446536b | 921 | PsndRate = 44100; |
922 | PicoAutoRgnOrder = 0x184; // US, EU, JP | |
2446536b | 923 | |
2446536b | 924 | vout_width = 320; |
925 | vout_height = 240; | |
926 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); | |
927 | ||
928 | PicoInit(); | |
41946d70 | 929 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
2446536b | 930 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
931 | ||
932 | //PicoMessage = plat_status_msg_busy_next; | |
933 | PicoMCDopenTray = disk_tray_open; | |
934 | PicoMCDcloseTray = disk_tray_close; | |
531a8f38 | 935 | |
936 | update_variables(); | |
2446536b | 937 | } |
938 | ||
939 | void retro_deinit(void) | |
940 | { | |
941 | PicoExit(); | |
942 | } |