| 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 | #include <sys/mman.h> |
| 15 | #else |
| 16 | #include <windows.h> |
| 17 | #endif |
| 18 | #include <errno.h> |
| 19 | #ifdef __MACH__ |
| 20 | #include <libkern/OSCacheControl.h> |
| 21 | #endif |
| 22 | |
| 23 | #include <pico/pico_int.h> |
| 24 | #include <pico/state.h> |
| 25 | #include "common/input_pico.h" |
| 26 | #include "common/version.h" |
| 27 | #include "libretro.h" |
| 28 | |
| 29 | #ifndef MAP_ANONYMOUS |
| 30 | #define MAP_ANONYMOUS MAP_ANON |
| 31 | #endif |
| 32 | |
| 33 | static retro_video_refresh_t video_cb; |
| 34 | static retro_input_poll_t input_poll_cb; |
| 35 | static retro_input_state_t input_state_cb; |
| 36 | static retro_environment_t environ_cb; |
| 37 | static retro_audio_sample_batch_t audio_batch_cb; |
| 38 | |
| 39 | static FILE *emu_log; |
| 40 | |
| 41 | #define VOUT_MAX_WIDTH 320 |
| 42 | #define VOUT_MAX_HEIGHT 240 |
| 43 | static void *vout_buf; |
| 44 | static int vout_width, vout_height; |
| 45 | |
| 46 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; |
| 47 | |
| 48 | static void snd_write(int len); |
| 49 | |
| 50 | #ifdef _WIN32 |
| 51 | #define SLASH '\\' |
| 52 | #else |
| 53 | #define SLASH '/' |
| 54 | #endif |
| 55 | |
| 56 | /* functions called by the core */ |
| 57 | |
| 58 | void cache_flush_d_inval_i(void *start, void *end) |
| 59 | { |
| 60 | #ifdef __arm__ |
| 61 | #if defined(__BLACKBERRY_QNX__) |
| 62 | msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE); |
| 63 | #elif defined(__MACH__) |
| 64 | size_t len = (char *)end - (char *)start; |
| 65 | sys_dcache_flush(start, len); |
| 66 | sys_icache_invalidate(start, len); |
| 67 | #else |
| 68 | __clear_cache(start, end); |
| 69 | #endif |
| 70 | #endif |
| 71 | } |
| 72 | |
| 73 | #ifdef _WIN32 |
| 74 | void* mmap(void *desired_addr, |
| 75 | size_t len, |
| 76 | int mmap_prot, |
| 77 | int mmap_flags, |
| 78 | HANDLE fd, |
| 79 | size_t off) |
| 80 | { |
| 81 | HANDLE fmh; |
| 82 | void *base_addr; |
| 83 | SECURITY_ATTRIBUTES sa; |
| 84 | sa.nLength = sizeof(sa); |
| 85 | sa.lpSecurityDescriptor = NULL; |
| 86 | sa.bInheritHandle = TRUE; |
| 87 | fmh = CreateFileMapping(fd, &sa, PAGE_WRITECOPY , 0, len, NULL); |
| 88 | if (fmh == NULL){ return NULL; } |
| 89 | base_addr = MapViewOfFileEx(fmh, FILE_MAP_WRITE|FILE_MAP_READ, 0, off, len, desired_addr); |
| 90 | CloseHandle(fmh); |
| 91 | return base_addr; |
| 92 | } |
| 93 | |
| 94 | void munmap( |
| 95 | void *base_addr, |
| 96 | size_t len |
| 97 | ) |
| 98 | { |
| 99 | UnmapViewOfFile(base_addr); |
| 100 | } |
| 101 | #define MAP_FAILED 0 |
| 102 | #define PROT_READ 0 |
| 103 | #define PROT_WRITE 0 |
| 104 | #define MAP_PRIVATE 0 |
| 105 | #define MAP_ANONYMOUS 0 |
| 106 | #endif |
| 107 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
| 108 | { |
| 109 | #ifndef _WIN32 |
| 110 | int flags = 0; |
| 111 | void *ret = mmap((void*)addr,size,PROT_READ | PROT_WRITE, flags, -1, 0); |
| 112 | if (addr != 0 && ret != (void *)addr) { |
| 113 | lprintf("warning: wanted to map @%08lx, got %p\n", |
| 114 | addr, ret); |
| 115 | |
| 116 | if (is_fixed) { |
| 117 | munmap(ret, size); |
| 118 | return NULL; |
| 119 | } |
| 120 | } |
| 121 | #else |
| 122 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
| 123 | void *req, *ret; |
| 124 | |
| 125 | req = (void *)addr; |
| 126 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); |
| 127 | if (ret == MAP_FAILED) { |
| 128 | lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno); |
| 129 | return NULL; |
| 130 | } |
| 131 | |
| 132 | if (addr != 0 && ret != (void *)addr) { |
| 133 | lprintf("warning: wanted to map @%08lx, got %p\n", |
| 134 | addr, ret); |
| 135 | |
| 136 | if (is_fixed) { |
| 137 | munmap(ret, size); |
| 138 | return NULL; |
| 139 | } |
| 140 | } |
| 141 | #endif |
| 142 | |
| 143 | return ret; |
| 144 | } |
| 145 | |
| 146 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) |
| 147 | { |
| 148 | #ifdef __linux__ |
| 149 | void *ret = mremap(ptr, oldsize, newsize, 0); |
| 150 | if (ret == MAP_FAILED) |
| 151 | return NULL; |
| 152 | |
| 153 | return ret; |
| 154 | #else |
| 155 | void *tmp, *ret; |
| 156 | size_t preserve_size; |
| 157 | |
| 158 | preserve_size = oldsize; |
| 159 | if (preserve_size > newsize) |
| 160 | preserve_size = newsize; |
| 161 | tmp = malloc(preserve_size); |
| 162 | if (tmp == NULL) |
| 163 | return NULL; |
| 164 | memcpy(tmp, ptr, preserve_size); |
| 165 | |
| 166 | munmap(ptr, oldsize); |
| 167 | ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE, |
| 168 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 169 | if (ret == MAP_FAILED) { |
| 170 | free(tmp); |
| 171 | return NULL; |
| 172 | } |
| 173 | memcpy(ret, tmp, preserve_size); |
| 174 | free(tmp); |
| 175 | return ret; |
| 176 | #endif |
| 177 | } |
| 178 | |
| 179 | void plat_munmap(void *ptr, size_t size) |
| 180 | { |
| 181 | if (ptr != NULL) |
| 182 | munmap(ptr, size); |
| 183 | } |
| 184 | |
| 185 | int plat_mem_set_exec(void *ptr, size_t size) |
| 186 | { |
| 187 | #ifdef _WIN32 |
| 188 | int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0); |
| 189 | if (ret == 0) |
| 190 | lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0); |
| 191 | #else |
| 192 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); |
| 193 | if (ret != 0) |
| 194 | lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno); |
| 195 | #endif |
| 196 | return ret; |
| 197 | } |
| 198 | |
| 199 | void emu_video_mode_change(int start_line, int line_count, int is_32cols) |
| 200 | { |
| 201 | memset(vout_buf, 0, 320 * 240 * 2); |
| 202 | vout_width = is_32cols ? 256 : 320; |
| 203 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
| 204 | } |
| 205 | |
| 206 | void emu_32x_startup(void) |
| 207 | { |
| 208 | } |
| 209 | |
| 210 | #ifndef ANDROID |
| 211 | |
| 212 | void lprintf(const char *fmt, ...) |
| 213 | { |
| 214 | va_list list; |
| 215 | |
| 216 | va_start(list, fmt); |
| 217 | fprintf(emu_log, "PicoDrive: "); |
| 218 | vfprintf(emu_log, fmt, list); |
| 219 | va_end(list); |
| 220 | fflush(emu_log); |
| 221 | } |
| 222 | |
| 223 | #else |
| 224 | |
| 225 | #include <android/log.h> |
| 226 | |
| 227 | void lprintf(const char *fmt, ...) |
| 228 | { |
| 229 | va_list list; |
| 230 | |
| 231 | va_start(list, fmt); |
| 232 | __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list); |
| 233 | va_end(list); |
| 234 | } |
| 235 | |
| 236 | #endif |
| 237 | |
| 238 | /* libretro */ |
| 239 | void retro_set_environment(retro_environment_t cb) |
| 240 | { |
| 241 | static const struct retro_variable vars[] = { |
| 242 | //{ "region", "Region; Auto|NTSC|PAL" }, |
| 243 | { NULL, NULL }, |
| 244 | }; |
| 245 | |
| 246 | environ_cb = cb; |
| 247 | |
| 248 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); |
| 249 | } |
| 250 | |
| 251 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } |
| 252 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } |
| 253 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } |
| 254 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } |
| 255 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } |
| 256 | |
| 257 | unsigned retro_api_version(void) |
| 258 | { |
| 259 | return RETRO_API_VERSION; |
| 260 | } |
| 261 | |
| 262 | void retro_set_controller_port_device(unsigned port, unsigned device) |
| 263 | { |
| 264 | } |
| 265 | |
| 266 | void retro_get_system_info(struct retro_system_info *info) |
| 267 | { |
| 268 | memset(info, 0, sizeof(*info)); |
| 269 | info->library_name = "PicoDrive"; |
| 270 | info->library_version = VERSION; |
| 271 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
| 272 | info->need_fullpath = true; |
| 273 | } |
| 274 | |
| 275 | void retro_get_system_av_info(struct retro_system_av_info *info) |
| 276 | { |
| 277 | memset(info, 0, sizeof(*info)); |
| 278 | info->timing.fps = Pico.m.pal ? 50 : 60; |
| 279 | info->timing.sample_rate = 44100; |
| 280 | info->geometry.base_width = 320; |
| 281 | info->geometry.base_height = 240; |
| 282 | info->geometry.max_width = VOUT_MAX_WIDTH; |
| 283 | info->geometry.max_height = VOUT_MAX_HEIGHT; |
| 284 | info->geometry.aspect_ratio = 4.0 / 3.0; |
| 285 | } |
| 286 | |
| 287 | /* savestates */ |
| 288 | struct savestate_state { |
| 289 | const char *load_buf; |
| 290 | char *save_buf; |
| 291 | size_t size; |
| 292 | size_t pos; |
| 293 | }; |
| 294 | |
| 295 | size_t state_read(void *p, size_t size, size_t nmemb, void *file) |
| 296 | { |
| 297 | struct savestate_state *state = file; |
| 298 | size_t bsize = size * nmemb; |
| 299 | |
| 300 | if (state->pos + bsize > state->size) { |
| 301 | lprintf("savestate error: %u/%u\n", |
| 302 | state->pos + bsize, state->size); |
| 303 | bsize = state->size - state->pos; |
| 304 | if ((int)bsize <= 0) |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | memcpy(p, state->load_buf + state->pos, bsize); |
| 309 | state->pos += bsize; |
| 310 | return bsize; |
| 311 | } |
| 312 | |
| 313 | size_t state_write(void *p, size_t size, size_t nmemb, void *file) |
| 314 | { |
| 315 | struct savestate_state *state = file; |
| 316 | size_t bsize = size * nmemb; |
| 317 | |
| 318 | if (state->pos + bsize > state->size) { |
| 319 | lprintf("savestate error: %u/%u\n", |
| 320 | state->pos + bsize, state->size); |
| 321 | bsize = state->size - state->pos; |
| 322 | if ((int)bsize <= 0) |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | memcpy(state->save_buf + state->pos, p, bsize); |
| 327 | state->pos += bsize; |
| 328 | return bsize; |
| 329 | } |
| 330 | |
| 331 | size_t state_skip(void *p, size_t size, size_t nmemb, void *file) |
| 332 | { |
| 333 | struct savestate_state *state = file; |
| 334 | size_t bsize = size * nmemb; |
| 335 | |
| 336 | state->pos += bsize; |
| 337 | return bsize; |
| 338 | } |
| 339 | |
| 340 | size_t state_eof(void *file) |
| 341 | { |
| 342 | struct savestate_state *state = file; |
| 343 | |
| 344 | return state->pos >= state->size; |
| 345 | } |
| 346 | |
| 347 | int state_fseek(void *file, long offset, int whence) |
| 348 | { |
| 349 | struct savestate_state *state = file; |
| 350 | |
| 351 | switch (whence) { |
| 352 | case SEEK_SET: |
| 353 | state->pos = offset; |
| 354 | break; |
| 355 | case SEEK_CUR: |
| 356 | state->pos += offset; |
| 357 | break; |
| 358 | case SEEK_END: |
| 359 | state->pos = state->size + offset; |
| 360 | break; |
| 361 | } |
| 362 | return (int)state->pos; |
| 363 | } |
| 364 | |
| 365 | /* savestate sizes vary wildly depending if cd/32x or |
| 366 | * carthw is active, so run the whole thing to get size */ |
| 367 | size_t retro_serialize_size(void) |
| 368 | { |
| 369 | struct savestate_state state = { 0, }; |
| 370 | int ret; |
| 371 | |
| 372 | ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek); |
| 373 | if (ret != 0) |
| 374 | return 0; |
| 375 | |
| 376 | return state.pos; |
| 377 | } |
| 378 | |
| 379 | bool retro_serialize(void *data, size_t size) |
| 380 | { |
| 381 | struct savestate_state state = { 0, }; |
| 382 | int ret; |
| 383 | |
| 384 | state.save_buf = data; |
| 385 | state.size = size; |
| 386 | state.pos = 0; |
| 387 | |
| 388 | ret = PicoStateFP(&state, 1, NULL, state_write, |
| 389 | NULL, state_fseek); |
| 390 | return ret == 0; |
| 391 | } |
| 392 | |
| 393 | bool retro_unserialize(const void *data, size_t size) |
| 394 | { |
| 395 | struct savestate_state state = { 0, }; |
| 396 | int ret; |
| 397 | |
| 398 | state.load_buf = data; |
| 399 | state.size = size; |
| 400 | state.pos = 0; |
| 401 | |
| 402 | ret = PicoStateFP(&state, 0, state_read, NULL, |
| 403 | state_eof, state_fseek); |
| 404 | return ret == 0; |
| 405 | } |
| 406 | |
| 407 | /* cheats - TODO */ |
| 408 | void retro_cheat_reset(void) |
| 409 | { |
| 410 | } |
| 411 | |
| 412 | void retro_cheat_set(unsigned index, bool enabled, const char *code) |
| 413 | { |
| 414 | } |
| 415 | |
| 416 | /* multidisk support */ |
| 417 | static bool disk_ejected; |
| 418 | static unsigned int disk_current_index; |
| 419 | static unsigned int disk_count; |
| 420 | static struct disks_state { |
| 421 | char *fname; |
| 422 | } disks[8]; |
| 423 | |
| 424 | static bool disk_set_eject_state(bool ejected) |
| 425 | { |
| 426 | // TODO? |
| 427 | disk_ejected = ejected; |
| 428 | return true; |
| 429 | } |
| 430 | |
| 431 | static bool disk_get_eject_state(void) |
| 432 | { |
| 433 | return disk_ejected; |
| 434 | } |
| 435 | |
| 436 | static unsigned int disk_get_image_index(void) |
| 437 | { |
| 438 | return disk_current_index; |
| 439 | } |
| 440 | |
| 441 | static bool disk_set_image_index(unsigned int index) |
| 442 | { |
| 443 | cd_img_type cd_type; |
| 444 | int ret; |
| 445 | |
| 446 | if (index >= sizeof(disks) / sizeof(disks[0])) |
| 447 | return false; |
| 448 | |
| 449 | if (disks[index].fname == NULL) { |
| 450 | lprintf("missing disk #%u\n", index); |
| 451 | |
| 452 | // RetroArch specifies "no disk" with index == count, |
| 453 | // so don't fail here.. |
| 454 | disk_current_index = index; |
| 455 | return true; |
| 456 | } |
| 457 | |
| 458 | lprintf("switching to disk %u: \"%s\"\n", index, |
| 459 | disks[index].fname); |
| 460 | |
| 461 | ret = -1; |
| 462 | cd_type = PicoCdCheck(disks[index].fname, NULL); |
| 463 | if (cd_type != CIT_NOT_CD) |
| 464 | ret = Insert_CD(disks[index].fname, cd_type); |
| 465 | if (ret != 0) { |
| 466 | lprintf("Load failed, invalid CD image?\n"); |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | disk_current_index = index; |
| 471 | return true; |
| 472 | } |
| 473 | |
| 474 | static unsigned int disk_get_num_images(void) |
| 475 | { |
| 476 | return disk_count; |
| 477 | } |
| 478 | |
| 479 | static bool disk_replace_image_index(unsigned index, |
| 480 | const struct retro_game_info *info) |
| 481 | { |
| 482 | bool ret = true; |
| 483 | |
| 484 | if (index >= sizeof(disks) / sizeof(disks[0])) |
| 485 | return false; |
| 486 | |
| 487 | if (disks[index].fname != NULL) |
| 488 | free(disks[index].fname); |
| 489 | disks[index].fname = NULL; |
| 490 | |
| 491 | if (info != NULL) { |
| 492 | disks[index].fname = strdup(info->path); |
| 493 | if (index == disk_current_index) |
| 494 | ret = disk_set_image_index(index); |
| 495 | } |
| 496 | |
| 497 | return ret; |
| 498 | } |
| 499 | |
| 500 | static bool disk_add_image_index(void) |
| 501 | { |
| 502 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) |
| 503 | return false; |
| 504 | |
| 505 | disk_count++; |
| 506 | return true; |
| 507 | } |
| 508 | |
| 509 | static struct retro_disk_control_callback disk_control = { |
| 510 | .set_eject_state = disk_set_eject_state, |
| 511 | .get_eject_state = disk_get_eject_state, |
| 512 | .get_image_index = disk_get_image_index, |
| 513 | .set_image_index = disk_set_image_index, |
| 514 | .get_num_images = disk_get_num_images, |
| 515 | .replace_image_index = disk_replace_image_index, |
| 516 | .add_image_index = disk_add_image_index, |
| 517 | }; |
| 518 | |
| 519 | static void disk_tray_open(void) |
| 520 | { |
| 521 | lprintf("cd tray open\n"); |
| 522 | disk_ejected = 1; |
| 523 | } |
| 524 | |
| 525 | static void disk_tray_close(void) |
| 526 | { |
| 527 | lprintf("cd tray close\n"); |
| 528 | disk_ejected = 0; |
| 529 | } |
| 530 | |
| 531 | |
| 532 | static const char * const biosfiles_us[] = { |
| 533 | "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U" |
| 534 | }; |
| 535 | static const char * const biosfiles_eu[] = { |
| 536 | "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E" |
| 537 | }; |
| 538 | static const char * const biosfiles_jp[] = { |
| 539 | "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
| 540 | }; |
| 541 | |
| 542 | static void make_system_path(char *buf, size_t buf_size, |
| 543 | const char *name, const char *ext) |
| 544 | { |
| 545 | const char *dir = NULL; |
| 546 | |
| 547 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { |
| 548 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); |
| 549 | } |
| 550 | else { |
| 551 | snprintf(buf, buf_size, "%s%s", name, ext); |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | static const char *find_bios(int *region, const char *cd_fname) |
| 556 | { |
| 557 | const char * const *files; |
| 558 | static char path[256]; |
| 559 | int i, count; |
| 560 | FILE *f = NULL; |
| 561 | |
| 562 | if (*region == 4) { // US |
| 563 | files = biosfiles_us; |
| 564 | count = sizeof(biosfiles_us) / sizeof(char *); |
| 565 | } else if (*region == 8) { // EU |
| 566 | files = biosfiles_eu; |
| 567 | count = sizeof(biosfiles_eu) / sizeof(char *); |
| 568 | } else if (*region == 1 || *region == 2) { |
| 569 | files = biosfiles_jp; |
| 570 | count = sizeof(biosfiles_jp) / sizeof(char *); |
| 571 | } else { |
| 572 | return NULL; |
| 573 | } |
| 574 | |
| 575 | for (i = 0; i < count; i++) |
| 576 | { |
| 577 | make_system_path(path, sizeof(path), files[i], ".bin"); |
| 578 | f = fopen(path, "rb"); |
| 579 | if (f != NULL) |
| 580 | break; |
| 581 | |
| 582 | make_system_path(path, sizeof(path), files[i], ".zip"); |
| 583 | f = fopen(path, "rb"); |
| 584 | if (f != NULL) |
| 585 | break; |
| 586 | } |
| 587 | |
| 588 | if (f != NULL) { |
| 589 | lprintf("using bios: %s\n", path); |
| 590 | fclose(f); |
| 591 | return path; |
| 592 | } |
| 593 | |
| 594 | return NULL; |
| 595 | } |
| 596 | |
| 597 | bool retro_load_game(const struct retro_game_info *info) |
| 598 | { |
| 599 | enum media_type_e media_type; |
| 600 | static char carthw_path[256]; |
| 601 | size_t i; |
| 602 | |
| 603 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; |
| 604 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { |
| 605 | lprintf("RGB565 suppot required, sorry\n"); |
| 606 | return false; |
| 607 | } |
| 608 | |
| 609 | if (info == NULL || info->path == NULL) { |
| 610 | lprintf("info->path required\n"); |
| 611 | return false; |
| 612 | } |
| 613 | |
| 614 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { |
| 615 | if (disks[i].fname != NULL) { |
| 616 | free(disks[i].fname); |
| 617 | disks[i].fname = NULL; |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | disk_current_index = 0; |
| 622 | disk_count = 1; |
| 623 | disks[0].fname = strdup(info->path); |
| 624 | |
| 625 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); |
| 626 | |
| 627 | media_type = PicoLoadMedia(info->path, carthw_path, |
| 628 | find_bios, NULL); |
| 629 | |
| 630 | switch (media_type) { |
| 631 | case PM_BAD_DETECT: |
| 632 | lprintf("Failed to detect ROM/CD image type.\n"); |
| 633 | return false; |
| 634 | case PM_BAD_CD: |
| 635 | lprintf("Invalid CD image\n"); |
| 636 | return false; |
| 637 | case PM_BAD_CD_NO_BIOS: |
| 638 | lprintf("Missing BIOS\n"); |
| 639 | return false; |
| 640 | case PM_ERROR: |
| 641 | lprintf("Load error\n"); |
| 642 | return false; |
| 643 | default: |
| 644 | break; |
| 645 | } |
| 646 | |
| 647 | PicoLoopPrepare(); |
| 648 | |
| 649 | PicoWriteSound = snd_write; |
| 650 | memset(sndBuffer, 0, sizeof(sndBuffer)); |
| 651 | PsndOut = sndBuffer; |
| 652 | PsndRerate(1); |
| 653 | |
| 654 | return true; |
| 655 | } |
| 656 | |
| 657 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) |
| 658 | { |
| 659 | return false; |
| 660 | } |
| 661 | |
| 662 | void retro_unload_game(void) |
| 663 | { |
| 664 | } |
| 665 | |
| 666 | unsigned retro_get_region(void) |
| 667 | { |
| 668 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; |
| 669 | } |
| 670 | |
| 671 | void *retro_get_memory_data(unsigned id) |
| 672 | { |
| 673 | if (id != RETRO_MEMORY_SAVE_RAM) |
| 674 | return NULL; |
| 675 | |
| 676 | if (PicoAHW & PAHW_MCD) |
| 677 | return Pico_mcd->bram; |
| 678 | else |
| 679 | return SRam.data; |
| 680 | } |
| 681 | |
| 682 | size_t retro_get_memory_size(unsigned id) |
| 683 | { |
| 684 | if (id != RETRO_MEMORY_SAVE_RAM) |
| 685 | return 0; |
| 686 | |
| 687 | if (PicoAHW & PAHW_MCD) |
| 688 | // bram |
| 689 | return 0x2000; |
| 690 | else |
| 691 | return SRam.size; |
| 692 | } |
| 693 | |
| 694 | void retro_reset(void) |
| 695 | { |
| 696 | PicoReset(); |
| 697 | } |
| 698 | |
| 699 | static const unsigned short retro_pico_map[] = { |
| 700 | [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, |
| 701 | [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, |
| 702 | [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, |
| 703 | [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, |
| 704 | [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, |
| 705 | [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, |
| 706 | [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, |
| 707 | [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, |
| 708 | [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, |
| 709 | [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, |
| 710 | [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, |
| 711 | [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, |
| 712 | }; |
| 713 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) |
| 714 | |
| 715 | static void snd_write(int len) |
| 716 | { |
| 717 | audio_batch_cb(PsndOut, len / 4); |
| 718 | } |
| 719 | |
| 720 | void retro_run(void) |
| 721 | { |
| 722 | bool updated = false; |
| 723 | int pad, i; |
| 724 | |
| 725 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) |
| 726 | ; //update_variables(true); |
| 727 | |
| 728 | input_poll_cb(); |
| 729 | |
| 730 | PicoPad[0] = PicoPad[1] = 0; |
| 731 | for (pad = 0; pad < 2; pad++) |
| 732 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) |
| 733 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) |
| 734 | PicoPad[pad] |= retro_pico_map[i]; |
| 735 | |
| 736 | PicoFrame(); |
| 737 | |
| 738 | video_cb(vout_buf, vout_width, vout_height, vout_width * 2); |
| 739 | } |
| 740 | |
| 741 | void retro_init(void) |
| 742 | { |
| 743 | int level; |
| 744 | |
| 745 | #ifdef IOS |
| 746 | emu_log = fopen("/User/Documents/PicoDrive.log", "w"); |
| 747 | if (emu_log == NULL) |
| 748 | emu_log = fopen("PicoDrive.log", "w"); |
| 749 | if (emu_log == NULL) |
| 750 | #endif |
| 751 | emu_log = stdout; |
| 752 | |
| 753 | level = 0; |
| 754 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); |
| 755 | |
| 756 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); |
| 757 | |
| 758 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |
| 759 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
| 760 | | POPT_EN_32X|POPT_EN_PWM |
| 761 | | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER; |
| 762 | #ifdef __arm__ |
| 763 | PicoOpt |= POPT_EN_SVP_DRC; |
| 764 | #endif |
| 765 | PsndRate = 44100; |
| 766 | PicoAutoRgnOrder = 0x184; // US, EU, JP |
| 767 | PicoCDBuffers = 0; |
| 768 | |
| 769 | vout_width = 320; |
| 770 | vout_height = 240; |
| 771 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); |
| 772 | |
| 773 | PicoInit(); |
| 774 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
| 775 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
| 776 | |
| 777 | //PicoMessage = plat_status_msg_busy_next; |
| 778 | PicoMCDopenTray = disk_tray_open; |
| 779 | PicoMCDcloseTray = disk_tray_close; |
| 780 | } |
| 781 | |
| 782 | void retro_deinit(void) |
| 783 | { |
| 784 | PicoExit(); |
| 785 | } |