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> |
5345c2b9 T |
29 | #include "../common/input_pico.h" |
30 | #include "../common/version.h" | |
2446536b | 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 | |
ed06ffd3 T |
45 | #ifdef _MSC_VER |
46 | static short sndBuffer[2*44100/50]; | |
47 | #else | |
2446536b | 48 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; |
ed06ffd3 | 49 | #endif |
2446536b | 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 | { |
ed06ffd3 T |
116 | uint32_t flProtect, dwDesiredAccess; |
117 | off_t end; | |
118 | HANDLE mmap_fd, h; | |
119 | void *ret; | |
120 | ||
6f1133bc T |
121 | if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) |
122 | return MAP_FAILED; | |
123 | if (fd == -1) { | |
124 | if (!(flags & MAP_ANON) || offset) | |
125 | return MAP_FAILED; | |
126 | } else if (flags & MAP_ANON) | |
127 | return MAP_FAILED; | |
128 | ||
6f1133bc T |
129 | if (prot & PROT_WRITE) { |
130 | if (prot & PROT_EXEC) | |
131 | flProtect = PAGE_EXECUTE_READWRITE; | |
132 | else | |
133 | flProtect = PAGE_READWRITE; | |
134 | } else if (prot & PROT_EXEC) { | |
135 | if (prot & PROT_READ) | |
136 | flProtect = PAGE_EXECUTE_READ; | |
137 | else if (prot & PROT_EXEC) | |
138 | flProtect = PAGE_EXECUTE; | |
139 | } else | |
140 | flProtect = PAGE_READONLY; | |
141 | ||
ed06ffd3 T |
142 | end = length + offset; |
143 | ||
6f1133bc T |
144 | if (fd == -1) |
145 | mmap_fd = INVALID_HANDLE_VALUE; | |
146 | else | |
147 | mmap_fd = (HANDLE)_get_osfhandle(fd); | |
148 | h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL); | |
149 | if (h == NULL) | |
150 | return MAP_FAILED; | |
151 | ||
6f1133bc T |
152 | if (prot & PROT_WRITE) |
153 | dwDesiredAccess = FILE_MAP_WRITE; | |
154 | else | |
155 | dwDesiredAccess = FILE_MAP_READ; | |
156 | if (prot & PROT_EXEC) | |
157 | dwDesiredAccess |= FILE_MAP_EXECUTE; | |
158 | if (flags & MAP_PRIVATE) | |
159 | dwDesiredAccess |= FILE_MAP_COPY; | |
ed06ffd3 | 160 | ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length); |
6f1133bc T |
161 | if (ret == NULL) { |
162 | CloseHandle(h); | |
163 | ret = MAP_FAILED; | |
164 | } | |
165 | return ret; | |
e8b61936 | 166 | } |
2446536b | 167 | |
6f1133bc | 168 | static void munmap(void *addr, size_t length) |
e8b61936 | 169 | { |
6f1133bc T |
170 | UnmapViewOfFile(addr); |
171 | /* ruh-ro, we leaked handle from CreateFileMapping() ... */ | |
e8b61936 | 172 | } |
f18d0e08 | 173 | #elif defined(NO_MMAP) |
5345c2b9 | 174 | #define PROT_EXEC 0x04 |
f18d0e08 | 175 | #define MAP_FAILED 0 |
176 | #define PROT_READ 0 | |
177 | #define PROT_WRITE 0 | |
178 | #define MAP_PRIVATE 0 | |
179 | #define MAP_ANONYMOUS 0 | |
180 | ||
181 | void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off) | |
182 | { | |
183 | return malloc(len); | |
184 | } | |
185 | ||
186 | void munmap(void *base_addr, size_t len) | |
187 | { | |
188 | free(base_addr); | |
189 | } | |
190 | ||
191 | int mprotect(void *addr, size_t len, int prot) | |
192 | { | |
193 | /* stub - not really needed at this point since this codepath has no dynarecs */ | |
194 | return 0; | |
195 | } | |
196 | ||
e8b61936 | 197 | #endif |
8e5639bc | 198 | |
199 | #ifndef MAP_ANONYMOUS | |
200 | #define MAP_ANONYMOUS MAP_ANON | |
201 | #endif | |
202 | ||
e8b61936 | 203 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
204 | { | |
e8b61936 | 205 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
206 | void *req, *ret; | |
207 | ||
208 | req = (void *)addr; | |
209 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
210 | if (ret == MAP_FAILED) { | |
f5d4045b | 211 | if (log_cb) |
212 | log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno); | |
e8b61936 | 213 | return NULL; |
214 | } | |
215 | ||
216 | if (addr != 0 && ret != (void *)addr) { | |
f5d4045b | 217 | if (log_cb) |
218 | log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n", | |
219 | addr, ret); | |
e8b61936 | 220 | |
221 | if (is_fixed) { | |
222 | munmap(ret, size); | |
223 | return NULL; | |
224 | } | |
225 | } | |
2446536b | 226 | |
227 | return ret; | |
228 | } | |
229 | ||
230 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) | |
231 | { | |
8c8b7284 | 232 | #ifdef __linux__ |
2446536b | 233 | void *ret = mremap(ptr, oldsize, newsize, 0); |
234 | if (ret == MAP_FAILED) | |
235 | return NULL; | |
236 | ||
237 | return ret; | |
8c8b7284 | 238 | #else |
239 | void *tmp, *ret; | |
240 | size_t preserve_size; | |
241 | ||
242 | preserve_size = oldsize; | |
243 | if (preserve_size > newsize) | |
244 | preserve_size = newsize; | |
245 | tmp = malloc(preserve_size); | |
246 | if (tmp == NULL) | |
247 | return NULL; | |
248 | memcpy(tmp, ptr, preserve_size); | |
249 | ||
250 | munmap(ptr, oldsize); | |
251 | ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE, | |
252 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
253 | if (ret == MAP_FAILED) { | |
254 | free(tmp); | |
255 | return NULL; | |
256 | } | |
257 | memcpy(ret, tmp, preserve_size); | |
258 | free(tmp); | |
259 | return ret; | |
260 | #endif | |
2446536b | 261 | } |
262 | ||
263 | void plat_munmap(void *ptr, size_t size) | |
264 | { | |
265 | if (ptr != NULL) | |
266 | munmap(ptr, size); | |
267 | } | |
268 | ||
c25d78ee | 269 | int plat_mem_set_exec(void *ptr, size_t size) |
270 | { | |
e8b61936 | 271 | #ifdef _WIN32 |
272 | int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0); | |
f5d4045b | 273 | if (ret == 0 && log_cb) |
274 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0); | |
e8b61936 | 275 | #else |
276 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); | |
f5d4045b | 277 | if (ret != 0 && log_cb) |
278 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno); | |
e8b61936 | 279 | #endif |
c25d78ee | 280 | return ret; |
281 | } | |
282 | ||
2446536b | 283 | void emu_video_mode_change(int start_line, int line_count, int is_32cols) |
284 | { | |
285 | memset(vout_buf, 0, 320 * 240 * 2); | |
286 | vout_width = is_32cols ? 256 : 320; | |
287 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); | |
51c08950 | 288 | |
289 | vout_height = line_count; | |
290 | vout_offset = vout_width * start_line; | |
2446536b | 291 | } |
292 | ||
293 | void emu_32x_startup(void) | |
294 | { | |
2446536b | 295 | } |
296 | ||
2446536b | 297 | void lprintf(const char *fmt, ...) |
298 | { | |
c681e48d | 299 | char buffer[256]; |
300 | va_list ap; | |
301 | va_start(ap, fmt); | |
302 | vsprintf(buffer, fmt, ap); | |
f5d4045b | 303 | /* TODO - add 'level' param for warning/error messages? */ |
304 | if (log_cb) | |
c681e48d | 305 | log_cb(RETRO_LOG_INFO, "%s\n", fmt); |
2446536b | 306 | } |
307 | ||
2446536b | 308 | /* libretro */ |
309 | void retro_set_environment(retro_environment_t cb) | |
310 | { | |
311 | static const struct retro_variable vars[] = { | |
312 | //{ "region", "Region; Auto|NTSC|PAL" }, | |
531a8f38 | 313 | { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" }, |
314 | { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" }, | |
27f190ea | 315 | { "picodrive_sprlim", "No sprite limit; disabled|enabled" }, |
316 | { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" }, | |
0185b677 | 317 | #ifdef DRC_SH2 |
318 | { "picodrive_drc", "Dynamic recompilers; enabled|disabled" }, | |
319 | #endif | |
2446536b | 320 | { NULL, NULL }, |
321 | }; | |
322 | ||
323 | environ_cb = cb; | |
324 | ||
325 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); | |
326 | } | |
327 | ||
328 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } | |
329 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } | |
330 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } | |
331 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } | |
332 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } | |
333 | ||
334 | unsigned retro_api_version(void) | |
335 | { | |
336 | return RETRO_API_VERSION; | |
337 | } | |
338 | ||
339 | void retro_set_controller_port_device(unsigned port, unsigned device) | |
340 | { | |
341 | } | |
342 | ||
343 | void retro_get_system_info(struct retro_system_info *info) | |
344 | { | |
345 | memset(info, 0, sizeof(*info)); | |
346 | info->library_name = "PicoDrive"; | |
347 | info->library_version = VERSION; | |
53b2e51c | 348 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
2446536b | 349 | info->need_fullpath = true; |
350 | } | |
351 | ||
352 | void retro_get_system_av_info(struct retro_system_av_info *info) | |
353 | { | |
354 | memset(info, 0, sizeof(*info)); | |
355 | info->timing.fps = Pico.m.pal ? 50 : 60; | |
356 | info->timing.sample_rate = 44100; | |
357 | info->geometry.base_width = 320; | |
51c08950 | 358 | info->geometry.base_height = vout_height; |
2446536b | 359 | info->geometry.max_width = VOUT_MAX_WIDTH; |
360 | info->geometry.max_height = VOUT_MAX_HEIGHT; | |
51c08950 | 361 | info->geometry.aspect_ratio = 0.0f; |
2446536b | 362 | } |
363 | ||
86b38dc4 | 364 | /* savestates */ |
365 | struct savestate_state { | |
366 | const char *load_buf; | |
367 | char *save_buf; | |
368 | size_t size; | |
369 | size_t pos; | |
370 | }; | |
371 | ||
372 | size_t state_read(void *p, size_t size, size_t nmemb, void *file) | |
373 | { | |
374 | struct savestate_state *state = file; | |
375 | size_t bsize = size * nmemb; | |
376 | ||
377 | if (state->pos + bsize > state->size) { | |
f5d4045b | 378 | if (log_cb) |
379 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", | |
380 | state->pos + bsize, state->size); | |
86b38dc4 | 381 | bsize = state->size - state->pos; |
382 | if ((int)bsize <= 0) | |
383 | return 0; | |
384 | } | |
385 | ||
386 | memcpy(p, state->load_buf + state->pos, bsize); | |
387 | state->pos += bsize; | |
388 | return bsize; | |
389 | } | |
390 | ||
391 | size_t state_write(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 | if (state->pos + bsize > state->size) { | |
f5d4045b | 397 | if (log_cb) |
398 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", | |
399 | state->pos + bsize, state->size); | |
86b38dc4 | 400 | bsize = state->size - state->pos; |
401 | if ((int)bsize <= 0) | |
402 | return 0; | |
403 | } | |
404 | ||
405 | memcpy(state->save_buf + state->pos, p, bsize); | |
406 | state->pos += bsize; | |
407 | return bsize; | |
408 | } | |
409 | ||
410 | size_t state_skip(void *p, size_t size, size_t nmemb, void *file) | |
411 | { | |
412 | struct savestate_state *state = file; | |
413 | size_t bsize = size * nmemb; | |
414 | ||
415 | state->pos += bsize; | |
416 | return bsize; | |
417 | } | |
418 | ||
419 | size_t state_eof(void *file) | |
420 | { | |
421 | struct savestate_state *state = file; | |
422 | ||
423 | return state->pos >= state->size; | |
424 | } | |
425 | ||
426 | int state_fseek(void *file, long offset, int whence) | |
427 | { | |
428 | struct savestate_state *state = file; | |
429 | ||
430 | switch (whence) { | |
431 | case SEEK_SET: | |
432 | state->pos = offset; | |
433 | break; | |
434 | case SEEK_CUR: | |
435 | state->pos += offset; | |
436 | break; | |
437 | case SEEK_END: | |
438 | state->pos = state->size + offset; | |
439 | break; | |
440 | } | |
441 | return (int)state->pos; | |
442 | } | |
443 | ||
444 | /* savestate sizes vary wildly depending if cd/32x or | |
445 | * carthw is active, so run the whole thing to get size */ | |
2446536b | 446 | size_t retro_serialize_size(void) |
447 | { | |
86b38dc4 | 448 | struct savestate_state state = { 0, }; |
449 | int ret; | |
450 | ||
451 | ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek); | |
452 | if (ret != 0) | |
453 | return 0; | |
454 | ||
455 | return state.pos; | |
2446536b | 456 | } |
457 | ||
458 | bool retro_serialize(void *data, size_t size) | |
459 | { | |
86b38dc4 | 460 | struct savestate_state state = { 0, }; |
461 | int ret; | |
462 | ||
463 | state.save_buf = data; | |
464 | state.size = size; | |
465 | state.pos = 0; | |
466 | ||
467 | ret = PicoStateFP(&state, 1, NULL, state_write, | |
468 | NULL, state_fseek); | |
469 | return ret == 0; | |
2446536b | 470 | } |
471 | ||
472 | bool retro_unserialize(const void *data, size_t size) | |
473 | { | |
86b38dc4 | 474 | struct savestate_state state = { 0, }; |
475 | int ret; | |
476 | ||
477 | state.load_buf = data; | |
478 | state.size = size; | |
479 | state.pos = 0; | |
480 | ||
481 | ret = PicoStateFP(&state, 0, state_read, NULL, | |
482 | state_eof, state_fseek); | |
483 | return ret == 0; | |
2446536b | 484 | } |
485 | ||
486 | /* cheats - TODO */ | |
487 | void retro_cheat_reset(void) | |
488 | { | |
489 | } | |
490 | ||
491 | void retro_cheat_set(unsigned index, bool enabled, const char *code) | |
492 | { | |
493 | } | |
494 | ||
495 | /* multidisk support */ | |
496 | static bool disk_ejected; | |
497 | static unsigned int disk_current_index; | |
498 | static unsigned int disk_count; | |
499 | static struct disks_state { | |
500 | char *fname; | |
501 | } disks[8]; | |
502 | ||
503 | static bool disk_set_eject_state(bool ejected) | |
504 | { | |
505 | // TODO? | |
506 | disk_ejected = ejected; | |
507 | return true; | |
508 | } | |
509 | ||
510 | static bool disk_get_eject_state(void) | |
511 | { | |
512 | return disk_ejected; | |
513 | } | |
514 | ||
515 | static unsigned int disk_get_image_index(void) | |
516 | { | |
517 | return disk_current_index; | |
518 | } | |
519 | ||
520 | static bool disk_set_image_index(unsigned int index) | |
521 | { | |
274fcc35 | 522 | enum cd_img_type cd_type; |
2446536b | 523 | int ret; |
524 | ||
525 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
526 | return false; | |
527 | ||
528 | if (disks[index].fname == NULL) { | |
f5d4045b | 529 | if (log_cb) |
530 | log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index); | |
2446536b | 531 | |
532 | // RetroArch specifies "no disk" with index == count, | |
533 | // so don't fail here.. | |
534 | disk_current_index = index; | |
535 | return true; | |
536 | } | |
537 | ||
f5d4045b | 538 | if (log_cb) |
539 | log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index, | |
540 | disks[index].fname); | |
2446536b | 541 | |
542 | ret = -1; | |
543 | cd_type = PicoCdCheck(disks[index].fname, NULL); | |
544 | if (cd_type != CIT_NOT_CD) | |
274fcc35 | 545 | ret = cdd_load(disks[index].fname, cd_type); |
2446536b | 546 | if (ret != 0) { |
f5d4045b | 547 | if (log_cb) |
548 | log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n"); | |
2446536b | 549 | return 0; |
550 | } | |
551 | ||
552 | disk_current_index = index; | |
553 | return true; | |
554 | } | |
555 | ||
556 | static unsigned int disk_get_num_images(void) | |
557 | { | |
558 | return disk_count; | |
559 | } | |
560 | ||
561 | static bool disk_replace_image_index(unsigned index, | |
562 | const struct retro_game_info *info) | |
563 | { | |
564 | bool ret = true; | |
565 | ||
566 | if (index >= sizeof(disks) / sizeof(disks[0])) | |
567 | return false; | |
568 | ||
569 | if (disks[index].fname != NULL) | |
570 | free(disks[index].fname); | |
571 | disks[index].fname = NULL; | |
572 | ||
573 | if (info != NULL) { | |
574 | disks[index].fname = strdup(info->path); | |
575 | if (index == disk_current_index) | |
576 | ret = disk_set_image_index(index); | |
577 | } | |
578 | ||
579 | return ret; | |
580 | } | |
581 | ||
582 | static bool disk_add_image_index(void) | |
583 | { | |
584 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) | |
585 | return false; | |
586 | ||
587 | disk_count++; | |
588 | return true; | |
589 | } | |
590 | ||
591 | static struct retro_disk_control_callback disk_control = { | |
ed06ffd3 T |
592 | disk_set_eject_state, |
593 | disk_get_eject_state, | |
594 | disk_get_image_index, | |
595 | disk_set_image_index, | |
596 | disk_get_num_images, | |
597 | disk_replace_image_index, | |
598 | disk_add_image_index, | |
2446536b | 599 | }; |
600 | ||
601 | static void disk_tray_open(void) | |
602 | { | |
f5d4045b | 603 | if (log_cb) |
604 | log_cb(RETRO_LOG_INFO, "cd tray open\n"); | |
2446536b | 605 | disk_ejected = 1; |
606 | } | |
607 | ||
608 | static void disk_tray_close(void) | |
609 | { | |
f5d4045b | 610 | if (log_cb) |
611 | log_cb(RETRO_LOG_INFO, "cd tray close\n"); | |
2446536b | 612 | disk_ejected = 0; |
613 | } | |
614 | ||
615 | ||
616 | static const char * const biosfiles_us[] = { | |
b08a2950 | 617 | "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U" |
2446536b | 618 | }; |
619 | static const char * const biosfiles_eu[] = { | |
b08a2950 | 620 | "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E" |
2446536b | 621 | }; |
622 | static const char * const biosfiles_jp[] = { | |
b08a2950 | 623 | "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
2446536b | 624 | }; |
625 | ||
626 | static void make_system_path(char *buf, size_t buf_size, | |
627 | const char *name, const char *ext) | |
628 | { | |
629 | const char *dir = NULL; | |
630 | ||
631 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { | |
632 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); | |
633 | } | |
634 | else { | |
635 | snprintf(buf, buf_size, "%s%s", name, ext); | |
636 | } | |
637 | } | |
638 | ||
639 | static const char *find_bios(int *region, const char *cd_fname) | |
640 | { | |
641 | const char * const *files; | |
642 | static char path[256]; | |
643 | int i, count; | |
644 | FILE *f = NULL; | |
645 | ||
646 | if (*region == 4) { // US | |
647 | files = biosfiles_us; | |
648 | count = sizeof(biosfiles_us) / sizeof(char *); | |
649 | } else if (*region == 8) { // EU | |
650 | files = biosfiles_eu; | |
651 | count = sizeof(biosfiles_eu) / sizeof(char *); | |
652 | } else if (*region == 1 || *region == 2) { | |
653 | files = biosfiles_jp; | |
654 | count = sizeof(biosfiles_jp) / sizeof(char *); | |
655 | } else { | |
656 | return NULL; | |
657 | } | |
658 | ||
659 | for (i = 0; i < count; i++) | |
660 | { | |
661 | make_system_path(path, sizeof(path), files[i], ".bin"); | |
662 | f = fopen(path, "rb"); | |
663 | if (f != NULL) | |
664 | break; | |
665 | ||
666 | make_system_path(path, sizeof(path), files[i], ".zip"); | |
667 | f = fopen(path, "rb"); | |
668 | if (f != NULL) | |
669 | break; | |
670 | } | |
671 | ||
672 | if (f != NULL) { | |
f5d4045b | 673 | if (log_cb) |
674 | log_cb(RETRO_LOG_INFO, "using bios: %s\n", path); | |
2446536b | 675 | fclose(f); |
676 | return path; | |
677 | } | |
678 | ||
679 | return NULL; | |
680 | } | |
681 | ||
682 | bool retro_load_game(const struct retro_game_info *info) | |
683 | { | |
684 | enum media_type_e media_type; | |
685 | static char carthw_path[256]; | |
686 | size_t i; | |
687 | ||
688 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; | |
689 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { | |
f5d4045b | 690 | if (log_cb) |
691 | log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n"); | |
2446536b | 692 | return false; |
693 | } | |
694 | ||
695 | if (info == NULL || info->path == NULL) { | |
f5d4045b | 696 | if (log_cb) |
697 | log_cb(RETRO_LOG_ERROR, "info->path required\n"); | |
2446536b | 698 | return false; |
699 | } | |
700 | ||
701 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { | |
702 | if (disks[i].fname != NULL) { | |
703 | free(disks[i].fname); | |
704 | disks[i].fname = NULL; | |
705 | } | |
706 | } | |
707 | ||
708 | disk_current_index = 0; | |
709 | disk_count = 1; | |
710 | disks[0].fname = strdup(info->path); | |
711 | ||
712 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); | |
713 | ||
714 | media_type = PicoLoadMedia(info->path, carthw_path, | |
715 | find_bios, NULL); | |
716 | ||
717 | switch (media_type) { | |
718 | case PM_BAD_DETECT: | |
f5d4045b | 719 | if (log_cb) |
720 | log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n"); | |
2446536b | 721 | return false; |
722 | case PM_BAD_CD: | |
f5d4045b | 723 | if (log_cb) |
724 | log_cb(RETRO_LOG_ERROR, "Invalid CD image\n"); | |
2446536b | 725 | return false; |
726 | case PM_BAD_CD_NO_BIOS: | |
f5d4045b | 727 | if (log_cb) |
728 | log_cb(RETRO_LOG_ERROR, "Missing BIOS\n"); | |
2446536b | 729 | return false; |
730 | case PM_ERROR: | |
f5d4045b | 731 | if (log_cb) |
732 | log_cb(RETRO_LOG_ERROR, "Load error\n"); | |
2446536b | 733 | return false; |
734 | default: | |
735 | break; | |
736 | } | |
737 | ||
738 | PicoLoopPrepare(); | |
739 | ||
740 | PicoWriteSound = snd_write; | |
741 | memset(sndBuffer, 0, sizeof(sndBuffer)); | |
742 | PsndOut = sndBuffer; | |
27f190ea | 743 | PsndRerate(0); |
2446536b | 744 | |
745 | return true; | |
746 | } | |
747 | ||
748 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) | |
749 | { | |
750 | return false; | |
751 | } | |
752 | ||
753 | void retro_unload_game(void) | |
754 | { | |
755 | } | |
756 | ||
757 | unsigned retro_get_region(void) | |
758 | { | |
759 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; | |
760 | } | |
761 | ||
762 | void *retro_get_memory_data(unsigned id) | |
763 | { | |
764 | if (id != RETRO_MEMORY_SAVE_RAM) | |
765 | return NULL; | |
766 | ||
767 | if (PicoAHW & PAHW_MCD) | |
768 | return Pico_mcd->bram; | |
769 | else | |
770 | return SRam.data; | |
771 | } | |
772 | ||
773 | size_t retro_get_memory_size(unsigned id) | |
774 | { | |
0fd6751d | 775 | unsigned int i; |
776 | int sum; | |
777 | ||
2446536b | 778 | if (id != RETRO_MEMORY_SAVE_RAM) |
779 | return 0; | |
780 | ||
781 | if (PicoAHW & PAHW_MCD) | |
782 | // bram | |
783 | return 0x2000; | |
0fd6751d | 784 | |
785 | if (Pico.m.frame_count == 0) | |
2446536b | 786 | return SRam.size; |
0fd6751d | 787 | |
788 | // if game doesn't write to sram, don't report it to | |
789 | // libretro so that RA doesn't write out zeroed .srm | |
790 | for (i = 0, sum = 0; i < SRam.size; i++) | |
791 | sum |= SRam.data[i]; | |
792 | ||
793 | return (sum != 0) ? SRam.size : 0; | |
2446536b | 794 | } |
795 | ||
796 | void retro_reset(void) | |
797 | { | |
798 | PicoReset(); | |
799 | } | |
800 | ||
801 | static const unsigned short retro_pico_map[] = { | |
ed06ffd3 T |
802 | 1 << GBTN_B, |
803 | 1 << GBTN_A, | |
804 | 1 << GBTN_MODE, | |
805 | 1 << GBTN_START, | |
806 | 1 << GBTN_UP, | |
807 | 1 << GBTN_DOWN, | |
808 | 1 << GBTN_LEFT, | |
809 | 1 << GBTN_RIGHT, | |
810 | 1 << GBTN_C, | |
811 | 1 << GBTN_Y, | |
812 | 1 << GBTN_X, | |
813 | 1 << GBTN_Z, | |
2446536b | 814 | }; |
815 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) | |
816 | ||
817 | static void snd_write(int len) | |
818 | { | |
819 | audio_batch_cb(PsndOut, len / 4); | |
820 | } | |
821 | ||
531a8f38 | 822 | static enum input_device input_name_to_val(const char *name) |
823 | { | |
824 | if (strcmp(name, "3 button pad") == 0) | |
825 | return PICO_INPUT_PAD_3BTN; | |
826 | if (strcmp(name, "6 button pad") == 0) | |
827 | return PICO_INPUT_PAD_6BTN; | |
828 | if (strcmp(name, "None") == 0) | |
829 | return PICO_INPUT_NOTHING; | |
830 | ||
f5d4045b | 831 | if (log_cb) |
832 | log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name); | |
531a8f38 | 833 | return PICO_INPUT_PAD_3BTN; |
834 | } | |
835 | ||
836 | static void update_variables(void) | |
837 | { | |
838 | struct retro_variable var; | |
839 | ||
840 | var.value = NULL; | |
841 | var.key = "picodrive_input1"; | |
842 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
843 | PicoSetInputDevice(0, input_name_to_val(var.value)); | |
844 | ||
845 | var.value = NULL; | |
846 | var.key = "picodrive_input2"; | |
847 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) | |
848 | PicoSetInputDevice(1, input_name_to_val(var.value)); | |
0185b677 | 849 | |
27f190ea | 850 | var.value = NULL; |
851 | var.key = "picodrive_sprlim"; | |
852 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
853 | if (strcmp(var.value, "enabled") == 0) | |
854 | PicoOpt |= POPT_DIS_SPRITE_LIM; | |
855 | else | |
856 | PicoOpt &= ~POPT_DIS_SPRITE_LIM; | |
857 | } | |
858 | ||
859 | var.value = NULL; | |
860 | var.key = "picodrive_ramcart"; | |
861 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
862 | if (strcmp(var.value, "enabled") == 0) | |
863 | PicoOpt |= POPT_EN_MCD_RAMCART; | |
864 | else | |
865 | PicoOpt &= ~POPT_EN_MCD_RAMCART; | |
866 | } | |
867 | ||
0185b677 | 868 | #ifdef DRC_SH2 |
869 | var.value = NULL; | |
870 | var.key = "picodrive_drc"; | |
871 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { | |
872 | if (strcmp(var.value, "enabled") == 0) | |
873 | PicoOpt |= POPT_EN_DRC; | |
874 | else | |
875 | PicoOpt &= ~POPT_EN_DRC; | |
876 | } | |
877 | #endif | |
531a8f38 | 878 | } |
879 | ||
2446536b | 880 | void retro_run(void) |
881 | { | |
882 | bool updated = false; | |
883 | int pad, i; | |
884 | ||
885 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) | |
531a8f38 | 886 | update_variables(); |
2446536b | 887 | |
888 | input_poll_cb(); | |
889 | ||
890 | PicoPad[0] = PicoPad[1] = 0; | |
891 | for (pad = 0; pad < 2; pad++) | |
892 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) | |
893 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) | |
894 | PicoPad[pad] |= retro_pico_map[i]; | |
895 | ||
896 | PicoFrame(); | |
897 | ||
51c08950 | 898 | video_cb((short *)vout_buf + vout_offset, |
899 | vout_width, vout_height, vout_width * 2); | |
2446536b | 900 | } |
901 | ||
2f832b7f | 902 | static void check_system_specs(void) |
903 | { | |
904 | /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */ | |
905 | unsigned level = 5; | |
906 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); | |
907 | } | |
908 | ||
2446536b | 909 | void retro_init(void) |
910 | { | |
f5d4045b | 911 | struct retro_log_callback log; |
2446536b | 912 | int level; |
913 | ||
2446536b | 914 | level = 0; |
915 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); | |
916 | ||
c681e48d | 917 | if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) |
f5d4045b | 918 | log_cb = log.log; |
c681e48d | 919 | else |
920 | log_cb = NULL; | |
f5d4045b | 921 | |
2446536b | 922 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); |
923 | ||
924 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 | |
720bfc5d | 925 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
926 | | POPT_EN_32X|POPT_EN_PWM | |
927 | | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER; | |
928 | #ifdef __arm__ | |
92dfd9af | 929 | PicoOpt |= POPT_EN_DRC; |
720bfc5d | 930 | #endif |
2446536b | 931 | PsndRate = 44100; |
932 | PicoAutoRgnOrder = 0x184; // US, EU, JP | |
2446536b | 933 | |
2446536b | 934 | vout_width = 320; |
935 | vout_height = 240; | |
936 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); | |
937 | ||
938 | PicoInit(); | |
41946d70 | 939 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
2446536b | 940 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
941 | ||
942 | //PicoMessage = plat_status_msg_busy_next; | |
943 | PicoMCDopenTray = disk_tray_open; | |
944 | PicoMCDcloseTray = disk_tray_close; | |
531a8f38 | 945 | |
946 | update_variables(); | |
2446536b | 947 | } |
948 | ||
949 | void retro_deinit(void) | |
950 | { | |
951 | PicoExit(); | |
952 | } |