| 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> |
| 13 | #ifndef _WIN32 |
| 14 | #ifndef NO_MMAP |
| 15 | #include <sys/mman.h> |
| 16 | #endif |
| 17 | #else |
| 18 | #include <io.h> |
| 19 | #include <windows.h> |
| 20 | #include <sys/types.h> |
| 21 | #endif |
| 22 | #include <errno.h> |
| 23 | #ifdef __MACH__ |
| 24 | #include <libkern/OSCacheControl.h> |
| 25 | #endif |
| 26 | |
| 27 | #include <pico/pico_int.h> |
| 28 | #include <pico/state.h> |
| 29 | #include "../common/input_pico.h" |
| 30 | #include "../common/version.h" |
| 31 | #include "libretro.h" |
| 32 | |
| 33 | static retro_log_printf_t log_cb; |
| 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 | |
| 40 | #define VOUT_MAX_WIDTH 320 |
| 41 | #define VOUT_MAX_HEIGHT 240 |
| 42 | static void *vout_buf; |
| 43 | static int vout_width, vout_height, vout_offset; |
| 44 | |
| 45 | #ifdef _MSC_VER |
| 46 | static short sndBuffer[2*44100/50]; |
| 47 | #else |
| 48 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; |
| 49 | #endif |
| 50 | |
| 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 | |
| 76 | #ifdef _WIN32 |
| 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) |
| 115 | { |
| 116 | uint32_t flProtect, dwDesiredAccess; |
| 117 | off_t end; |
| 118 | HANDLE mmap_fd, h; |
| 119 | void *ret; |
| 120 | |
| 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 | |
| 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 | |
| 142 | end = length + offset; |
| 143 | |
| 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 | |
| 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; |
| 160 | ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length); |
| 161 | if (ret == NULL) { |
| 162 | CloseHandle(h); |
| 163 | ret = MAP_FAILED; |
| 164 | } |
| 165 | return ret; |
| 166 | } |
| 167 | |
| 168 | static void munmap(void *addr, size_t length) |
| 169 | { |
| 170 | UnmapViewOfFile(addr); |
| 171 | /* ruh-ro, we leaked handle from CreateFileMapping() ... */ |
| 172 | } |
| 173 | #elif defined(NO_MMAP) |
| 174 | #define PROT_EXEC 0x04 |
| 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 | |
| 197 | #endif |
| 198 | |
| 199 | #ifndef MAP_ANONYMOUS |
| 200 | #define MAP_ANONYMOUS MAP_ANON |
| 201 | #endif |
| 202 | |
| 203 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
| 204 | { |
| 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) { |
| 211 | if (log_cb) |
| 212 | log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno); |
| 213 | return NULL; |
| 214 | } |
| 215 | |
| 216 | if (addr != 0 && ret != (void *)addr) { |
| 217 | if (log_cb) |
| 218 | log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n", |
| 219 | addr, ret); |
| 220 | |
| 221 | if (is_fixed) { |
| 222 | munmap(ret, size); |
| 223 | return NULL; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | return ret; |
| 228 | } |
| 229 | |
| 230 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) |
| 231 | { |
| 232 | #ifdef __linux__ |
| 233 | void *ret = mremap(ptr, oldsize, newsize, 0); |
| 234 | if (ret == MAP_FAILED) |
| 235 | return NULL; |
| 236 | |
| 237 | return ret; |
| 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 |
| 261 | } |
| 262 | |
| 263 | void plat_munmap(void *ptr, size_t size) |
| 264 | { |
| 265 | if (ptr != NULL) |
| 266 | munmap(ptr, size); |
| 267 | } |
| 268 | |
| 269 | int plat_mem_set_exec(void *ptr, size_t size) |
| 270 | { |
| 271 | #ifdef _WIN32 |
| 272 | int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0); |
| 273 | if (ret == 0 && log_cb) |
| 274 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0); |
| 275 | #else |
| 276 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); |
| 277 | if (ret != 0 && log_cb) |
| 278 | log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno); |
| 279 | #endif |
| 280 | return ret; |
| 281 | } |
| 282 | |
| 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); |
| 288 | |
| 289 | vout_height = line_count; |
| 290 | vout_offset = vout_width * start_line; |
| 291 | } |
| 292 | |
| 293 | void emu_32x_startup(void) |
| 294 | { |
| 295 | } |
| 296 | |
| 297 | void lprintf(const char *fmt, ...) |
| 298 | { |
| 299 | char buffer[256]; |
| 300 | va_list ap; |
| 301 | va_start(ap, fmt); |
| 302 | vsprintf(buffer, fmt, ap); |
| 303 | /* TODO - add 'level' param for warning/error messages? */ |
| 304 | if (log_cb) |
| 305 | log_cb(RETRO_LOG_INFO, "%s\n", fmt); |
| 306 | } |
| 307 | |
| 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" }, |
| 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" }, |
| 315 | { "picodrive_sprlim", "No sprite limit; disabled|enabled" }, |
| 316 | { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" }, |
| 317 | #ifdef DRC_SH2 |
| 318 | { "picodrive_drc", "Dynamic recompilers; enabled|disabled" }, |
| 319 | #endif |
| 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; |
| 348 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
| 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; |
| 358 | info->geometry.base_height = vout_height; |
| 359 | info->geometry.max_width = VOUT_MAX_WIDTH; |
| 360 | info->geometry.max_height = VOUT_MAX_HEIGHT; |
| 361 | info->geometry.aspect_ratio = 0.0f; |
| 362 | } |
| 363 | |
| 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) { |
| 378 | if (log_cb) |
| 379 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", |
| 380 | state->pos + bsize, state->size); |
| 381 | bsize = state->size - state->pos; |
| 382 | if ((int)bsize <= 0) |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | memcpy(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) { |
| 397 | if (log_cb) |
| 398 | log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n", |
| 399 | state->pos + bsize, state->size); |
| 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 */ |
| 446 | size_t retro_serialize_size(void) |
| 447 | { |
| 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; |
| 456 | } |
| 457 | |
| 458 | bool retro_serialize(void *data, size_t size) |
| 459 | { |
| 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; |
| 470 | } |
| 471 | |
| 472 | bool retro_unserialize(const void *data, size_t size) |
| 473 | { |
| 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; |
| 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 | { |
| 522 | enum cd_img_type cd_type; |
| 523 | int ret; |
| 524 | |
| 525 | if (index >= sizeof(disks) / sizeof(disks[0])) |
| 526 | return false; |
| 527 | |
| 528 | if (disks[index].fname == NULL) { |
| 529 | if (log_cb) |
| 530 | log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index); |
| 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 | |
| 538 | if (log_cb) |
| 539 | log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index, |
| 540 | disks[index].fname); |
| 541 | |
| 542 | ret = -1; |
| 543 | cd_type = PicoCdCheck(disks[index].fname, NULL); |
| 544 | if (cd_type != CIT_NOT_CD) |
| 545 | ret = cdd_load(disks[index].fname, cd_type); |
| 546 | if (ret != 0) { |
| 547 | if (log_cb) |
| 548 | log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n"); |
| 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 = { |
| 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, |
| 599 | }; |
| 600 | |
| 601 | static void disk_tray_open(void) |
| 602 | { |
| 603 | if (log_cb) |
| 604 | log_cb(RETRO_LOG_INFO, "cd tray open\n"); |
| 605 | disk_ejected = 1; |
| 606 | } |
| 607 | |
| 608 | static void disk_tray_close(void) |
| 609 | { |
| 610 | if (log_cb) |
| 611 | log_cb(RETRO_LOG_INFO, "cd tray close\n"); |
| 612 | disk_ejected = 0; |
| 613 | } |
| 614 | |
| 615 | |
| 616 | static const char * const biosfiles_us[] = { |
| 617 | "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U" |
| 618 | }; |
| 619 | static const char * const biosfiles_eu[] = { |
| 620 | "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E" |
| 621 | }; |
| 622 | static const char * const biosfiles_jp[] = { |
| 623 | "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
| 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) { |
| 673 | if (log_cb) |
| 674 | log_cb(RETRO_LOG_INFO, "using bios: %s\n", path); |
| 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)) { |
| 690 | if (log_cb) |
| 691 | log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n"); |
| 692 | return false; |
| 693 | } |
| 694 | |
| 695 | if (info == NULL || info->path == NULL) { |
| 696 | if (log_cb) |
| 697 | log_cb(RETRO_LOG_ERROR, "info->path required\n"); |
| 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: |
| 719 | if (log_cb) |
| 720 | log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n"); |
| 721 | return false; |
| 722 | case PM_BAD_CD: |
| 723 | if (log_cb) |
| 724 | log_cb(RETRO_LOG_ERROR, "Invalid CD image\n"); |
| 725 | return false; |
| 726 | case PM_BAD_CD_NO_BIOS: |
| 727 | if (log_cb) |
| 728 | log_cb(RETRO_LOG_ERROR, "Missing BIOS\n"); |
| 729 | return false; |
| 730 | case PM_ERROR: |
| 731 | if (log_cb) |
| 732 | log_cb(RETRO_LOG_ERROR, "Load error\n"); |
| 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; |
| 743 | PsndRerate(0); |
| 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 | { |
| 775 | unsigned int i; |
| 776 | int sum; |
| 777 | |
| 778 | if (id != RETRO_MEMORY_SAVE_RAM) |
| 779 | return 0; |
| 780 | |
| 781 | if (PicoAHW & PAHW_MCD) |
| 782 | // bram |
| 783 | return 0x2000; |
| 784 | |
| 785 | if (Pico.m.frame_count == 0) |
| 786 | return SRam.size; |
| 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; |
| 794 | } |
| 795 | |
| 796 | void retro_reset(void) |
| 797 | { |
| 798 | PicoReset(); |
| 799 | } |
| 800 | |
| 801 | static const unsigned short retro_pico_map[] = { |
| 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, |
| 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 | |
| 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 | |
| 831 | if (log_cb) |
| 832 | log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name); |
| 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)); |
| 849 | |
| 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 | |
| 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 |
| 878 | } |
| 879 | |
| 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) |
| 886 | update_variables(); |
| 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 | |
| 898 | video_cb((short *)vout_buf + vout_offset, |
| 899 | vout_width, vout_height, vout_width * 2); |
| 900 | } |
| 901 | |
| 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 | |
| 909 | void retro_init(void) |
| 910 | { |
| 911 | struct retro_log_callback log; |
| 912 | int level; |
| 913 | |
| 914 | level = 0; |
| 915 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); |
| 916 | |
| 917 | if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) |
| 918 | log_cb = log.log; |
| 919 | else |
| 920 | log_cb = NULL; |
| 921 | |
| 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 |
| 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__ |
| 929 | PicoOpt |= POPT_EN_DRC; |
| 930 | #endif |
| 931 | PsndRate = 44100; |
| 932 | PicoAutoRgnOrder = 0x184; // US, EU, JP |
| 933 | |
| 934 | vout_width = 320; |
| 935 | vout_height = 240; |
| 936 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); |
| 937 | |
| 938 | PicoInit(); |
| 939 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
| 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; |
| 945 | |
| 946 | update_variables(); |
| 947 | } |
| 948 | |
| 949 | void retro_deinit(void) |
| 950 | { |
| 951 | PicoExit(); |
| 952 | } |