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