libretro.c 36 KB

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  1. /*
  2. * libretro core glue for PicoDrive
  3. * (C) notaz, 2013
  4. * (C) aliaspider, 2016
  5. * (C) Daniel De Matteis, 2013
  6. *
  7. * This work is licensed under the terms of MAME license.
  8. * See COPYING file in the top-level directory.
  9. */
  10. #define _GNU_SOURCE 1 // mremap
  11. #include <stdio.h>
  12. #include <stdarg.h>
  13. #include <string.h>
  14. #ifndef _WIN32
  15. #ifndef NO_MMAP
  16. #include <sys/mman.h>
  17. #endif
  18. #else
  19. #include <io.h>
  20. #include <windows.h>
  21. #include <sys/types.h>
  22. #endif
  23. #include <errno.h>
  24. #ifdef __MACH__
  25. #include <libkern/OSCacheControl.h>
  26. #endif
  27. #ifdef _3DS
  28. #include "3ds/3ds_utils.h"
  29. #define MEMOP_MAP 4
  30. #define MEMOP_UNMAP 5
  31. #define MEMOP_PROT 6
  32. int svcDuplicateHandle(unsigned int* out, unsigned int original);
  33. int svcCloseHandle(unsigned int handle);
  34. int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
  35. unsigned int size, unsigned int type, unsigned int perm);
  36. void* linearMemAlign(size_t size, size_t alignment);
  37. void linearFree(void* mem);
  38. static int ctr_svchack_successful = 0;
  39. #elif defined(VITA)
  40. #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
  41. #include <psp2/kernel/sysmem.h>
  42. static int sceBlock;
  43. int getVMBlock();
  44. int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
  45. #endif
  46. #include <pico/pico_int.h>
  47. #include <pico/state.h>
  48. #include <pico/patch.h>
  49. #include "../common/input_pico.h"
  50. #include "../common/version.h"
  51. #include "libretro.h"
  52. static retro_log_printf_t log_cb;
  53. static retro_video_refresh_t video_cb;
  54. static retro_input_poll_t input_poll_cb;
  55. static retro_input_state_t input_state_cb;
  56. static retro_environment_t environ_cb;
  57. static retro_audio_sample_batch_t audio_batch_cb;
  58. #define VOUT_MAX_WIDTH 320
  59. #define VOUT_MAX_HEIGHT 240
  60. static const float VOUT_PAR = 0.0;
  61. static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
  62. static const float VOUT_CRT = (224.0f * 1.29911f);
  63. bool show_overscan = false;
  64. static void *vout_buf;
  65. static int vout_width, vout_height, vout_offset;
  66. static float user_vout_width = 0.0;
  67. #ifdef _MSC_VER
  68. static short sndBuffer[2*44100/50];
  69. #else
  70. static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
  71. #endif
  72. static void snd_write(int len);
  73. #ifdef _WIN32
  74. #define SLASH '\\'
  75. #else
  76. #define SLASH '/'
  77. #endif
  78. /* functions called by the core */
  79. void cache_flush_d_inval_i(void *start, void *end)
  80. {
  81. #ifdef __arm__
  82. size_t len = (char *)end - (char *)start;
  83. #if defined(__BLACKBERRY_QNX__)
  84. msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
  85. #elif defined(__MACH__)
  86. sys_dcache_flush(start, len);
  87. sys_icache_invalidate(start, len);
  88. #elif defined(_3DS)
  89. ctr_flush_invalidate_cache();
  90. #elif defined(VITA)
  91. sceKernelSyncVMDomain(sceBlock, start, len);
  92. #else
  93. __clear_cache(start, end);
  94. #endif
  95. #endif
  96. }
  97. #ifdef _WIN32
  98. /* mmap() replacement for Windows
  99. *
  100. * Author: Mike Frysinger <vapier@gentoo.org>
  101. * Placed into the public domain
  102. */
  103. /* References:
  104. * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
  105. * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
  106. * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
  107. * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
  108. */
  109. #define PROT_READ 0x1
  110. #define PROT_WRITE 0x2
  111. /* This flag is only available in WinXP+ */
  112. #ifdef FILE_MAP_EXECUTE
  113. #define PROT_EXEC 0x4
  114. #else
  115. #define PROT_EXEC 0x0
  116. #define FILE_MAP_EXECUTE 0
  117. #endif
  118. #define MAP_SHARED 0x01
  119. #define MAP_PRIVATE 0x02
  120. #define MAP_ANONYMOUS 0x20
  121. #define MAP_ANON MAP_ANONYMOUS
  122. #define MAP_FAILED ((void *) -1)
  123. #ifdef __USE_FILE_OFFSET64
  124. # define DWORD_HI(x) (x >> 32)
  125. # define DWORD_LO(x) ((x) & 0xffffffff)
  126. #else
  127. # define DWORD_HI(x) (0)
  128. # define DWORD_LO(x) (x)
  129. #endif
  130. static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
  131. {
  132. uint32_t flProtect, dwDesiredAccess;
  133. off_t end;
  134. HANDLE mmap_fd, h;
  135. void *ret;
  136. if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
  137. return MAP_FAILED;
  138. if (fd == -1) {
  139. if (!(flags & MAP_ANON) || offset)
  140. return MAP_FAILED;
  141. } else if (flags & MAP_ANON)
  142. return MAP_FAILED;
  143. if (prot & PROT_WRITE) {
  144. if (prot & PROT_EXEC)
  145. flProtect = PAGE_EXECUTE_READWRITE;
  146. else
  147. flProtect = PAGE_READWRITE;
  148. } else if (prot & PROT_EXEC) {
  149. if (prot & PROT_READ)
  150. flProtect = PAGE_EXECUTE_READ;
  151. else if (prot & PROT_EXEC)
  152. flProtect = PAGE_EXECUTE;
  153. } else
  154. flProtect = PAGE_READONLY;
  155. end = length + offset;
  156. if (fd == -1)
  157. mmap_fd = INVALID_HANDLE_VALUE;
  158. else
  159. mmap_fd = (HANDLE)_get_osfhandle(fd);
  160. h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
  161. if (h == NULL)
  162. return MAP_FAILED;
  163. if (prot & PROT_WRITE)
  164. dwDesiredAccess = FILE_MAP_WRITE;
  165. else
  166. dwDesiredAccess = FILE_MAP_READ;
  167. if (prot & PROT_EXEC)
  168. dwDesiredAccess |= FILE_MAP_EXECUTE;
  169. if (flags & MAP_PRIVATE)
  170. dwDesiredAccess |= FILE_MAP_COPY;
  171. ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
  172. if (ret == NULL) {
  173. CloseHandle(h);
  174. ret = MAP_FAILED;
  175. }
  176. return ret;
  177. }
  178. static void munmap(void *addr, size_t length)
  179. {
  180. UnmapViewOfFile(addr);
  181. /* ruh-ro, we leaked handle from CreateFileMapping() ... */
  182. }
  183. #elif defined(NO_MMAP)
  184. #define PROT_EXEC 0x04
  185. #define MAP_FAILED 0
  186. #define PROT_READ 0
  187. #define PROT_WRITE 0
  188. #define MAP_PRIVATE 0
  189. #define MAP_ANONYMOUS 0
  190. void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
  191. {
  192. return malloc(len);
  193. }
  194. void munmap(void *base_addr, size_t len)
  195. {
  196. free(base_addr);
  197. }
  198. int mprotect(void *addr, size_t len, int prot)
  199. {
  200. /* stub - not really needed at this point since this codepath has no dynarecs */
  201. return 0;
  202. }
  203. #endif
  204. #ifndef MAP_ANONYMOUS
  205. #define MAP_ANONYMOUS MAP_ANON
  206. #endif
  207. #ifdef _3DS
  208. typedef struct
  209. {
  210. unsigned int requested_map;
  211. void* buffer;
  212. }pico_mmap_t;
  213. pico_mmap_t pico_mmaps[] = {
  214. {0x02000000, 0},
  215. {0x06000000, 0},
  216. {NULL, 0}
  217. };
  218. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  219. {
  220. (void)is_fixed;
  221. if (ctr_svchack_successful)
  222. {
  223. pico_mmap_t* pico_mmap;
  224. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  225. {
  226. if ((pico_mmap->requested_map == addr))
  227. {
  228. unsigned int ptr_aligned, tmp;
  229. unsigned int currentHandle;
  230. unsigned int perm = 0b011;
  231. if (need_exec)
  232. perm = 0b111;
  233. size = (size + 0xFFF) & ~0xFFF;
  234. pico_mmap->buffer = malloc(size + 0x1000);
  235. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  236. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  237. if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
  238. {
  239. if (log_cb)
  240. log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
  241. exit(1);
  242. }
  243. svcCloseHandle(currentHandle);
  244. return (void*)pico_mmap->requested_map;
  245. }
  246. }
  247. }
  248. return malloc(size);
  249. }
  250. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  251. {
  252. if (ctr_svchack_successful)
  253. {
  254. pico_mmap_t* pico_mmap;
  255. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  256. {
  257. if ((pico_mmap->requested_map == (unsigned int)ptr))
  258. {
  259. unsigned int ptr_aligned;
  260. unsigned int currentHandle;
  261. void* tmp;
  262. oldsize = (oldsize + 0xFFF) & ~0xFFF;
  263. newsize = (newsize + 0xFFF) & ~0xFFF;
  264. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  265. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  266. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
  267. tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
  268. if(!tmp)
  269. return NULL;
  270. pico_mmap->buffer = tmp;
  271. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  272. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
  273. svcCloseHandle(currentHandle);
  274. return ptr;
  275. }
  276. }
  277. }
  278. return realloc(ptr, newsize);
  279. }
  280. void plat_munmap(void *ptr, size_t size)
  281. {
  282. if (ctr_svchack_successful)
  283. {
  284. pico_mmap_t* pico_mmap;
  285. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  286. {
  287. if ((pico_mmap->requested_map == (unsigned int)ptr))
  288. {
  289. unsigned int ptr_aligned;
  290. unsigned int currentHandle;
  291. size = (size + 0xFFF) & ~0xFFF;
  292. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  293. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  294. svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
  295. svcCloseHandle(currentHandle);
  296. free(pico_mmap->buffer);
  297. pico_mmap->buffer = NULL;
  298. return;
  299. }
  300. }
  301. }
  302. free(ptr);
  303. }
  304. #else
  305. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  306. {
  307. int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  308. void *req, *ret;
  309. req = (void *)addr;
  310. ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  311. if (ret == MAP_FAILED) {
  312. if (log_cb)
  313. log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
  314. return NULL;
  315. }
  316. if (addr != 0 && ret != (void *)addr) {
  317. if (log_cb)
  318. log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
  319. addr, ret);
  320. if (is_fixed) {
  321. munmap(ret, size);
  322. return NULL;
  323. }
  324. }
  325. return ret;
  326. }
  327. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  328. {
  329. #ifdef __linux__
  330. void *ret = mremap(ptr, oldsize, newsize, 0);
  331. if (ret == MAP_FAILED)
  332. return NULL;
  333. return ret;
  334. #else
  335. void *tmp, *ret;
  336. size_t preserve_size;
  337. preserve_size = oldsize;
  338. if (preserve_size > newsize)
  339. preserve_size = newsize;
  340. tmp = malloc(preserve_size);
  341. if (tmp == NULL)
  342. return NULL;
  343. memcpy(tmp, ptr, preserve_size);
  344. munmap(ptr, oldsize);
  345. ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
  346. MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  347. if (ret == MAP_FAILED) {
  348. free(tmp);
  349. return NULL;
  350. }
  351. memcpy(ret, tmp, preserve_size);
  352. free(tmp);
  353. return ret;
  354. #endif
  355. }
  356. void plat_munmap(void *ptr, size_t size)
  357. {
  358. if (ptr != NULL)
  359. munmap(ptr, size);
  360. }
  361. #endif
  362. int plat_mem_set_exec(void *ptr, size_t size)
  363. {
  364. #ifdef _WIN32
  365. int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
  366. if (ret == 0 && log_cb)
  367. log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
  368. #elif defined(_3DS)
  369. int ret = -1;
  370. if (ctr_svchack_successful)
  371. {
  372. unsigned int currentHandle;
  373. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  374. ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
  375. size, MEMOP_PROT, 0b111);
  376. svcCloseHandle(currentHandle);
  377. ctr_flush_invalidate_cache();
  378. }
  379. else
  380. {
  381. if (log_cb)
  382. log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
  383. exit(1);
  384. }
  385. #elif defined(VITA)
  386. int ret = sceKernelOpenVMDomain();
  387. #else
  388. int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
  389. if (ret != 0 && log_cb)
  390. log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
  391. #endif
  392. return ret;
  393. }
  394. void emu_video_mode_change(int start_line, int line_count, int is_32cols)
  395. {
  396. memset(vout_buf, 0, 320 * 240 * 2);
  397. vout_width = is_32cols ? 256 : 320;
  398. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  399. if (show_overscan == true) line_count += 16;
  400. if (show_overscan == true) start_line -= 8;
  401. vout_height = line_count;
  402. vout_offset = vout_width * start_line;
  403. // Update the geometry
  404. struct retro_system_av_info av_info;
  405. retro_get_system_av_info(&av_info);
  406. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  407. }
  408. void emu_32x_startup(void)
  409. {
  410. }
  411. void lprintf(const char *fmt, ...)
  412. {
  413. char buffer[256];
  414. va_list ap;
  415. va_start(ap, fmt);
  416. vsprintf(buffer, fmt, ap);
  417. /* TODO - add 'level' param for warning/error messages? */
  418. if (log_cb)
  419. log_cb(RETRO_LOG_INFO, "%s", buffer);
  420. va_end(ap);
  421. }
  422. /* libretro */
  423. void retro_set_environment(retro_environment_t cb)
  424. {
  425. static const struct retro_variable vars[] = {
  426. { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
  427. { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
  428. { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
  429. { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
  430. { "picodrive_region", "Region; Auto|Japan NTSC|Japan PAL|US|Europe" },
  431. { "picodrive_region_fps", "Region FPS; Auto|NTSC|PAL" },
  432. { "picodrive_aspect", "Core-provided aspect ratio; PAR|4/3|CRT" },
  433. { "picodrive_overscan", "Show Overscan; disabled|enabled" },
  434. #ifdef DRC_SH2
  435. { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
  436. #endif
  437. { NULL, NULL },
  438. };
  439. environ_cb = cb;
  440. cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
  441. }
  442. void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
  443. void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
  444. void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
  445. void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
  446. void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
  447. unsigned retro_api_version(void)
  448. {
  449. return RETRO_API_VERSION;
  450. }
  451. void retro_set_controller_port_device(unsigned port, unsigned device)
  452. {
  453. }
  454. void retro_get_system_info(struct retro_system_info *info)
  455. {
  456. memset(info, 0, sizeof(*info));
  457. info->library_name = "PicoDrive";
  458. #ifndef GIT_VERSION
  459. #define GIT_VERSION ""
  460. #endif
  461. info->library_version = VERSION GIT_VERSION;
  462. info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
  463. info->need_fullpath = true;
  464. }
  465. void retro_get_system_av_info(struct retro_system_av_info *info)
  466. {
  467. memset(info, 0, sizeof(*info));
  468. info->timing.fps = Pico.m.pal ? 50 : 60;
  469. info->timing.sample_rate = 44100;
  470. info->geometry.base_width = vout_width;
  471. info->geometry.base_height = vout_height;
  472. info->geometry.max_width = vout_width;
  473. info->geometry.max_height = vout_height;
  474. float common_width = vout_width;
  475. if (user_vout_width != 0)
  476. common_width = user_vout_width;
  477. info->geometry.aspect_ratio = common_width / vout_height;
  478. }
  479. /* savestates */
  480. struct savestate_state {
  481. const char *load_buf;
  482. char *save_buf;
  483. size_t size;
  484. size_t pos;
  485. };
  486. size_t state_read(void *p, size_t size, size_t nmemb, void *file)
  487. {
  488. struct savestate_state *state = file;
  489. size_t bsize = size * nmemb;
  490. if (state->pos + bsize > state->size) {
  491. if (log_cb)
  492. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  493. state->pos + bsize, state->size);
  494. bsize = state->size - state->pos;
  495. if ((int)bsize <= 0)
  496. return 0;
  497. }
  498. memcpy(p, state->load_buf + state->pos, bsize);
  499. state->pos += bsize;
  500. return bsize;
  501. }
  502. size_t state_write(void *p, size_t size, size_t nmemb, void *file)
  503. {
  504. struct savestate_state *state = file;
  505. size_t bsize = size * nmemb;
  506. if (state->pos + bsize > state->size) {
  507. if (log_cb)
  508. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  509. state->pos + bsize, state->size);
  510. bsize = state->size - state->pos;
  511. if ((int)bsize <= 0)
  512. return 0;
  513. }
  514. memcpy(state->save_buf + state->pos, p, bsize);
  515. state->pos += bsize;
  516. return bsize;
  517. }
  518. size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
  519. {
  520. struct savestate_state *state = file;
  521. size_t bsize = size * nmemb;
  522. state->pos += bsize;
  523. return bsize;
  524. }
  525. size_t state_eof(void *file)
  526. {
  527. struct savestate_state *state = file;
  528. return state->pos >= state->size;
  529. }
  530. int state_fseek(void *file, long offset, int whence)
  531. {
  532. struct savestate_state *state = file;
  533. switch (whence) {
  534. case SEEK_SET:
  535. state->pos = offset;
  536. break;
  537. case SEEK_CUR:
  538. state->pos += offset;
  539. break;
  540. case SEEK_END:
  541. state->pos = state->size + offset;
  542. break;
  543. }
  544. return (int)state->pos;
  545. }
  546. /* savestate sizes vary wildly depending if cd/32x or
  547. * carthw is active, so run the whole thing to get size */
  548. size_t retro_serialize_size(void)
  549. {
  550. struct savestate_state state = { 0, };
  551. int ret;
  552. ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
  553. if (ret != 0)
  554. return 0;
  555. return state.pos;
  556. }
  557. bool retro_serialize(void *data, size_t size)
  558. {
  559. struct savestate_state state = { 0, };
  560. int ret;
  561. state.save_buf = data;
  562. state.size = size;
  563. state.pos = 0;
  564. ret = PicoStateFP(&state, 1, NULL, state_write,
  565. NULL, state_fseek);
  566. return ret == 0;
  567. }
  568. bool retro_unserialize(const void *data, size_t size)
  569. {
  570. struct savestate_state state = { 0, };
  571. int ret;
  572. state.load_buf = data;
  573. state.size = size;
  574. state.pos = 0;
  575. ret = PicoStateFP(&state, 0, state_read, NULL,
  576. state_eof, state_fseek);
  577. return ret == 0;
  578. }
  579. typedef struct patch
  580. {
  581. unsigned int addr;
  582. unsigned short data;
  583. unsigned char comp;
  584. } patch;
  585. extern void decode(char *buff, patch *dest);
  586. extern uint16_t m68k_read16(uint32_t a);
  587. extern void m68k_write16(uint32_t a, uint16_t d);
  588. void retro_cheat_reset(void)
  589. {
  590. int i=0;
  591. unsigned int addr;
  592. for (i = 0; i < PicoPatchCount; i++)
  593. {
  594. addr = PicoPatches[i].addr;
  595. if (addr < Pico.romsize) {
  596. if (PicoPatches[i].active)
  597. *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
  598. } else {
  599. if (PicoPatches[i].active)
  600. m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
  601. }
  602. }
  603. PicoPatchUnload();
  604. }
  605. void retro_cheat_set(unsigned index, bool enabled, const char *code)
  606. {
  607. patch pt;
  608. int array_len = PicoPatchCount;
  609. char codeCopy[256];
  610. char *buff;
  611. if (code=='\0') return;
  612. strcpy(codeCopy,code);
  613. buff = strtok(codeCopy,"+");
  614. while (buff != NULL)
  615. {
  616. decode(buff, &pt);
  617. if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
  618. {
  619. log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
  620. return;
  621. }
  622. /* code was good, add it */
  623. if (array_len < PicoPatchCount + 1)
  624. {
  625. void *ptr;
  626. array_len *= 2;
  627. array_len++;
  628. ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
  629. if (ptr == NULL) {
  630. log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
  631. return;
  632. }
  633. PicoPatches = ptr;
  634. }
  635. strcpy(PicoPatches[PicoPatchCount].code, buff);
  636. PicoPatches[PicoPatchCount].active = enabled;
  637. PicoPatches[PicoPatchCount].addr = pt.addr;
  638. PicoPatches[PicoPatchCount].data = pt.data;
  639. PicoPatches[PicoPatchCount].comp = pt.comp;
  640. if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
  641. PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
  642. else
  643. PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
  644. PicoPatchCount++;
  645. buff = strtok(NULL,"+");
  646. }
  647. }
  648. /* multidisk support */
  649. static bool disk_ejected;
  650. static unsigned int disk_current_index;
  651. static unsigned int disk_count;
  652. static struct disks_state {
  653. char *fname;
  654. } disks[8];
  655. static bool disk_set_eject_state(bool ejected)
  656. {
  657. // TODO?
  658. disk_ejected = ejected;
  659. return true;
  660. }
  661. static bool disk_get_eject_state(void)
  662. {
  663. return disk_ejected;
  664. }
  665. static unsigned int disk_get_image_index(void)
  666. {
  667. return disk_current_index;
  668. }
  669. static bool disk_set_image_index(unsigned int index)
  670. {
  671. enum cd_img_type cd_type;
  672. int ret;
  673. if (index >= sizeof(disks) / sizeof(disks[0]))
  674. return false;
  675. if (disks[index].fname == NULL) {
  676. if (log_cb)
  677. log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
  678. // RetroArch specifies "no disk" with index == count,
  679. // so don't fail here..
  680. disk_current_index = index;
  681. return true;
  682. }
  683. if (log_cb)
  684. log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
  685. disks[index].fname);
  686. ret = -1;
  687. cd_type = PicoCdCheck(disks[index].fname, NULL);
  688. if (cd_type != CIT_NOT_CD)
  689. ret = cdd_load(disks[index].fname, cd_type);
  690. if (ret != 0) {
  691. if (log_cb)
  692. log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
  693. return 0;
  694. }
  695. disk_current_index = index;
  696. return true;
  697. }
  698. static unsigned int disk_get_num_images(void)
  699. {
  700. return disk_count;
  701. }
  702. static bool disk_replace_image_index(unsigned index,
  703. const struct retro_game_info *info)
  704. {
  705. bool ret = true;
  706. if (index >= sizeof(disks) / sizeof(disks[0]))
  707. return false;
  708. if (disks[index].fname != NULL)
  709. free(disks[index].fname);
  710. disks[index].fname = NULL;
  711. if (info != NULL) {
  712. disks[index].fname = strdup(info->path);
  713. if (index == disk_current_index)
  714. ret = disk_set_image_index(index);
  715. }
  716. return ret;
  717. }
  718. static bool disk_add_image_index(void)
  719. {
  720. if (disk_count >= sizeof(disks) / sizeof(disks[0]))
  721. return false;
  722. disk_count++;
  723. return true;
  724. }
  725. static struct retro_disk_control_callback disk_control = {
  726. disk_set_eject_state,
  727. disk_get_eject_state,
  728. disk_get_image_index,
  729. disk_set_image_index,
  730. disk_get_num_images,
  731. disk_replace_image_index,
  732. disk_add_image_index,
  733. };
  734. static void disk_tray_open(void)
  735. {
  736. if (log_cb)
  737. log_cb(RETRO_LOG_INFO, "cd tray open\n");
  738. disk_ejected = 1;
  739. }
  740. static void disk_tray_close(void)
  741. {
  742. if (log_cb)
  743. log_cb(RETRO_LOG_INFO, "cd tray close\n");
  744. disk_ejected = 0;
  745. }
  746. static const char * const biosfiles_us[] = {
  747. "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
  748. };
  749. static const char * const biosfiles_eu[] = {
  750. "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
  751. };
  752. static const char * const biosfiles_jp[] = {
  753. "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
  754. };
  755. static void make_system_path(char *buf, size_t buf_size,
  756. const char *name, const char *ext)
  757. {
  758. const char *dir = NULL;
  759. if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
  760. snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
  761. }
  762. else {
  763. snprintf(buf, buf_size, "%s%s", name, ext);
  764. }
  765. }
  766. static const char *find_bios(int *region, const char *cd_fname)
  767. {
  768. const char * const *files;
  769. static char path[256];
  770. int i, count;
  771. FILE *f = NULL;
  772. if (*region == 4) { // US
  773. files = biosfiles_us;
  774. count = sizeof(biosfiles_us) / sizeof(char *);
  775. } else if (*region == 8) { // EU
  776. files = biosfiles_eu;
  777. count = sizeof(biosfiles_eu) / sizeof(char *);
  778. } else if (*region == 1 || *region == 2) {
  779. files = biosfiles_jp;
  780. count = sizeof(biosfiles_jp) / sizeof(char *);
  781. } else {
  782. return NULL;
  783. }
  784. for (i = 0; i < count; i++)
  785. {
  786. make_system_path(path, sizeof(path), files[i], ".bin");
  787. f = fopen(path, "rb");
  788. if (f != NULL)
  789. break;
  790. make_system_path(path, sizeof(path), files[i], ".zip");
  791. f = fopen(path, "rb");
  792. if (f != NULL)
  793. break;
  794. }
  795. if (f != NULL) {
  796. if (log_cb)
  797. log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
  798. fclose(f);
  799. return path;
  800. }
  801. return NULL;
  802. }
  803. static void sram_reset()
  804. {
  805. SRam.data = NULL;
  806. SRam.start = 0;
  807. SRam.end = 0;
  808. SRam.flags = '\0';
  809. SRam.unused2 = '\0';
  810. SRam.changed = '\0' ;
  811. SRam.eeprom_type = '\0';
  812. SRam.unused3 = '\0';
  813. SRam.eeprom_bit_cl = '\0';
  814. SRam.eeprom_bit_in = '\0';
  815. SRam.eeprom_bit_out = '\0';
  816. SRam.size = 0;
  817. }
  818. bool retro_load_game(const struct retro_game_info *info)
  819. {
  820. enum media_type_e media_type;
  821. static char carthw_path[256];
  822. size_t i;
  823. struct retro_input_descriptor desc[] = {
  824. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  825. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  826. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  827. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  828. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  829. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  830. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  831. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  832. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  833. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  834. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  835. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  836. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  837. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  838. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  839. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  840. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  841. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  842. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  843. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  844. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  845. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  846. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  847. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  848. { 0 },
  849. };
  850. struct retro_input_descriptor desc_sms[] = {
  851. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  852. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  853. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  854. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  855. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  856. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  857. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  858. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  859. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  860. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  861. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  862. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  863. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  864. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  865. { 0 },
  866. };
  867. sram_reset();
  868. enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
  869. if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
  870. if (log_cb)
  871. log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
  872. return false;
  873. }
  874. if (info == NULL || info->path == NULL) {
  875. if (log_cb)
  876. log_cb(RETRO_LOG_ERROR, "info->path required\n");
  877. return false;
  878. }
  879. for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
  880. if (disks[i].fname != NULL) {
  881. free(disks[i].fname);
  882. disks[i].fname = NULL;
  883. }
  884. }
  885. disk_current_index = 0;
  886. disk_count = 1;
  887. disks[0].fname = strdup(info->path);
  888. make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
  889. media_type = PicoLoadMedia(info->path, carthw_path,
  890. find_bios, NULL);
  891. switch (media_type) {
  892. case PM_BAD_DETECT:
  893. if (log_cb)
  894. log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
  895. return false;
  896. case PM_BAD_CD:
  897. if (log_cb)
  898. log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
  899. return false;
  900. case PM_BAD_CD_NO_BIOS:
  901. if (log_cb)
  902. log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
  903. return false;
  904. case PM_ERROR:
  905. if (log_cb)
  906. log_cb(RETRO_LOG_ERROR, "Load error\n");
  907. return false;
  908. default:
  909. break;
  910. }
  911. if (media_type == PM_MARK3)
  912. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
  913. else
  914. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
  915. PicoLoopPrepare();
  916. PicoWriteSound = snd_write;
  917. memset(sndBuffer, 0, sizeof(sndBuffer));
  918. PsndOut = sndBuffer;
  919. PsndRerate(0);
  920. return true;
  921. }
  922. bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
  923. {
  924. return false;
  925. }
  926. void retro_unload_game(void)
  927. {
  928. }
  929. unsigned retro_get_region(void)
  930. {
  931. return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
  932. }
  933. void *retro_get_memory_data(unsigned type)
  934. {
  935. uint8_t* data;
  936. switch(type)
  937. {
  938. case RETRO_MEMORY_SAVE_RAM:
  939. if (PicoAHW & PAHW_MCD)
  940. data = Pico_mcd->bram;
  941. else
  942. data = SRam.data;
  943. break;
  944. case RETRO_MEMORY_SYSTEM_RAM:
  945. if (PicoAHW & PAHW_SMS)
  946. data = Pico.zram;
  947. else
  948. data = Pico.ram;
  949. break;
  950. default:
  951. data = NULL;
  952. break;
  953. }
  954. return data;
  955. }
  956. size_t retro_get_memory_size(unsigned type)
  957. {
  958. unsigned int i;
  959. int sum;
  960. switch(type)
  961. {
  962. case RETRO_MEMORY_SAVE_RAM:
  963. if (PicoAHW & PAHW_MCD)
  964. // bram
  965. return 0x2000;
  966. if (Pico.m.frame_count == 0)
  967. return SRam.size;
  968. // if game doesn't write to sram, don't report it to
  969. // libretro so that RA doesn't write out zeroed .srm
  970. for (i = 0, sum = 0; i < SRam.size; i++)
  971. sum |= SRam.data[i];
  972. return (sum != 0) ? SRam.size : 0;
  973. case RETRO_MEMORY_SYSTEM_RAM:
  974. if (PicoAHW & PAHW_SMS)
  975. return 0x2000;
  976. else
  977. return sizeof(Pico.ram);
  978. default:
  979. return 0;
  980. }
  981. }
  982. void retro_reset(void)
  983. {
  984. PicoReset();
  985. }
  986. static const unsigned short retro_pico_map[] = {
  987. 1 << GBTN_B,
  988. 1 << GBTN_A,
  989. 1 << GBTN_MODE,
  990. 1 << GBTN_START,
  991. 1 << GBTN_UP,
  992. 1 << GBTN_DOWN,
  993. 1 << GBTN_LEFT,
  994. 1 << GBTN_RIGHT,
  995. 1 << GBTN_C,
  996. 1 << GBTN_Y,
  997. 1 << GBTN_X,
  998. 1 << GBTN_Z,
  999. };
  1000. #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
  1001. static void snd_write(int len)
  1002. {
  1003. audio_batch_cb(PsndOut, len / 4);
  1004. }
  1005. static enum input_device input_name_to_val(const char *name)
  1006. {
  1007. if (strcmp(name, "3 button pad") == 0)
  1008. return PICO_INPUT_PAD_3BTN;
  1009. if (strcmp(name, "6 button pad") == 0)
  1010. return PICO_INPUT_PAD_6BTN;
  1011. if (strcmp(name, "None") == 0)
  1012. return PICO_INPUT_NOTHING;
  1013. if (log_cb)
  1014. log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
  1015. return PICO_INPUT_PAD_3BTN;
  1016. }
  1017. static void update_variables(void)
  1018. {
  1019. struct retro_variable var;
  1020. var.value = NULL;
  1021. var.key = "picodrive_input1";
  1022. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1023. PicoSetInputDevice(0, input_name_to_val(var.value));
  1024. var.value = NULL;
  1025. var.key = "picodrive_input2";
  1026. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1027. PicoSetInputDevice(1, input_name_to_val(var.value));
  1028. var.value = NULL;
  1029. var.key = "picodrive_sprlim";
  1030. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1031. if (strcmp(var.value, "enabled") == 0)
  1032. PicoOpt |= POPT_DIS_SPRITE_LIM;
  1033. else
  1034. PicoOpt &= ~POPT_DIS_SPRITE_LIM;
  1035. }
  1036. var.value = NULL;
  1037. var.key = "picodrive_ramcart";
  1038. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1039. if (strcmp(var.value, "enabled") == 0)
  1040. PicoOpt |= POPT_EN_MCD_RAMCART;
  1041. else
  1042. PicoOpt &= ~POPT_EN_MCD_RAMCART;
  1043. }
  1044. int OldPicoRegionOverride = PicoRegionOverride;
  1045. var.value = NULL;
  1046. var.key = "picodrive_region";
  1047. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1048. if (strcmp(var.value, "Auto") == 0)
  1049. PicoRegionOverride = 0;
  1050. else if (strcmp(var.value, "Japan NTSC") == 0)
  1051. PicoRegionOverride = 1;
  1052. else if (strcmp(var.value, "Japan PAL") == 0)
  1053. PicoRegionOverride = 2;
  1054. else if (strcmp(var.value, "US") == 0)
  1055. PicoRegionOverride = 4;
  1056. else if (strcmp(var.value, "Europe") == 0)
  1057. PicoRegionOverride = 8;
  1058. }
  1059. int OldPicoRegionFPSOverride = PicoRegionFPSOverride;
  1060. var.value = NULL;
  1061. var.key = "picodrive_region_fps";
  1062. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1063. if (strcmp(var.value, "Auto") == 0)
  1064. PicoRegionFPSOverride = 0;
  1065. else if (strcmp(var.value, "NTSC") == 0)
  1066. PicoRegionFPSOverride = 1;
  1067. else if (strcmp(var.value, "PAL") == 0)
  1068. PicoRegionFPSOverride = 2;
  1069. }
  1070. // Update region, fps and sound flags if needed
  1071. if (PicoRegionOverride != OldPicoRegionOverride ||
  1072. PicoRegionFPSOverride != OldPicoRegionFPSOverride)
  1073. {
  1074. PicoDetectRegion();
  1075. PicoLoopPrepare();
  1076. PsndRerate(1);
  1077. }
  1078. float old_user_vout_width = user_vout_width;
  1079. var.value = NULL;
  1080. var.key = "picodrive_aspect";
  1081. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1082. if (strcmp(var.value, "4/3") == 0)
  1083. user_vout_width = VOUT_4_3;
  1084. else if (strcmp(var.value, "CRT") == 0)
  1085. user_vout_width = VOUT_CRT;
  1086. else
  1087. user_vout_width = VOUT_PAR;
  1088. }
  1089. var.value = NULL;
  1090. var.key = "picodrive_overscan";
  1091. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1092. if (strcmp(var.value, "enabled") == 0)
  1093. show_overscan = true;
  1094. else
  1095. show_overscan = false;
  1096. }
  1097. if (user_vout_width != old_user_vout_width)
  1098. {
  1099. // Update the geometry
  1100. struct retro_system_av_info av_info;
  1101. retro_get_system_av_info(&av_info);
  1102. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  1103. }
  1104. #ifdef DRC_SH2
  1105. var.value = NULL;
  1106. var.key = "picodrive_drc";
  1107. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1108. if (strcmp(var.value, "enabled") == 0)
  1109. PicoOpt |= POPT_EN_DRC;
  1110. else
  1111. PicoOpt &= ~POPT_EN_DRC;
  1112. }
  1113. #endif
  1114. #ifdef _3DS
  1115. if(!ctr_svchack_successful)
  1116. PicoOpt &= ~POPT_EN_DRC;
  1117. #endif
  1118. }
  1119. void retro_run(void)
  1120. {
  1121. bool updated = false;
  1122. int pad, i;
  1123. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
  1124. update_variables();
  1125. input_poll_cb();
  1126. PicoPad[0] = PicoPad[1] = 0;
  1127. for (pad = 0; pad < 2; pad++)
  1128. for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
  1129. if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
  1130. PicoPad[pad] |= retro_pico_map[i];
  1131. PicoPatchApply();
  1132. PicoFrame();
  1133. video_cb((short *)vout_buf + vout_offset,
  1134. vout_width, vout_height, vout_width * 2);
  1135. }
  1136. static void check_system_specs(void)
  1137. {
  1138. /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */
  1139. unsigned level = 5;
  1140. environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
  1141. }
  1142. void retro_init(void)
  1143. {
  1144. struct retro_log_callback log;
  1145. int level;
  1146. level = 0;
  1147. environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
  1148. if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
  1149. log_cb = log.log;
  1150. else
  1151. log_cb = NULL;
  1152. environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
  1153. #ifdef _3DS
  1154. ctr_svchack_successful = ctr_svchack_init();
  1155. #elif defined(VITA)
  1156. sceBlock = getVMBlock();
  1157. #endif
  1158. PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
  1159. | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
  1160. | POPT_EN_32X|POPT_EN_PWM
  1161. | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
  1162. #ifdef __arm__
  1163. #ifdef _3DS
  1164. if (ctr_svchack_successful)
  1165. #endif
  1166. PicoOpt |= POPT_EN_DRC;
  1167. #endif
  1168. PsndRate = 44100;
  1169. PicoAutoRgnOrder = 0x184; // US, EU, JP
  1170. vout_width = 320;
  1171. vout_height = 240;
  1172. #ifdef _3DS
  1173. vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
  1174. #else
  1175. vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  1176. #endif
  1177. PicoInit();
  1178. PicoDrawSetOutFormat(PDF_RGB555, 0);
  1179. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  1180. //PicoMessage = plat_status_msg_busy_next;
  1181. PicoMCDopenTray = disk_tray_open;
  1182. PicoMCDcloseTray = disk_tray_close;
  1183. update_variables();
  1184. }
  1185. void retro_deinit(void)
  1186. {
  1187. #ifdef _3DS
  1188. linearFree(vout_buf);
  1189. #else
  1190. free(vout_buf);
  1191. #endif
  1192. vout_buf = NULL;
  1193. PicoExit();
  1194. }