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 <stdlib.h>
  13. #include <stdarg.h>
  14. #include <string.h>
  15. #ifndef _WIN32
  16. #ifndef NO_MMAP
  17. #include <sys/mman.h>
  18. #endif
  19. #else
  20. #include <io.h>
  21. #include <windows.h>
  22. #include <sys/types.h>
  23. #endif
  24. #include <errno.h>
  25. #ifdef __MACH__
  26. #include <libkern/OSCacheControl.h>
  27. #endif
  28. #ifdef _3DS
  29. #include "3ds/3ds_utils.h"
  30. #define MEMOP_MAP 4
  31. #define MEMOP_UNMAP 5
  32. #define MEMOP_PROT 6
  33. int svcDuplicateHandle(unsigned int* out, unsigned int original);
  34. int svcCloseHandle(unsigned int handle);
  35. int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
  36. unsigned int size, unsigned int type, unsigned int perm);
  37. void* linearMemAlign(size_t size, size_t alignment);
  38. void linearFree(void* mem);
  39. static int ctr_svchack_successful = 0;
  40. #elif defined(VITA)
  41. #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
  42. #include <psp2/kernel/sysmem.h>
  43. static int sceBlock;
  44. int getVMBlock();
  45. int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
  46. #endif
  47. #include <pico/pico_int.h>
  48. #include <pico/state.h>
  49. #include <pico/patch.h>
  50. #include "../common/input_pico.h"
  51. #include "../common/version.h"
  52. #include "libretro.h"
  53. static retro_log_printf_t log_cb;
  54. static retro_video_refresh_t video_cb;
  55. static retro_input_poll_t input_poll_cb;
  56. static retro_input_state_t input_state_cb;
  57. static retro_environment_t environ_cb;
  58. static retro_audio_sample_batch_t audio_batch_cb;
  59. #define VOUT_MAX_WIDTH 320
  60. #define VOUT_MAX_HEIGHT 240
  61. static const float VOUT_PAR = 0.0;
  62. static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
  63. static const float VOUT_CRT = (224.0f * 1.29911f);
  64. bool show_overscan = false;
  65. static void *vout_buf;
  66. static int vout_width, vout_height, vout_offset;
  67. static float user_vout_width = 0.0;
  68. static short ALIGNED(4) sndBuffer[2*44100/50];
  69. static void snd_write(int len);
  70. char **g_argv;
  71. #ifdef _WIN32
  72. #define SLASH '\\'
  73. #else
  74. #define SLASH '/'
  75. #endif
  76. /* functions called by the core */
  77. void cache_flush_d_inval_i(void *start, void *end)
  78. {
  79. #ifdef __arm__
  80. size_t len = (char *)end - (char *)start;
  81. (void)len;
  82. #if defined(__BLACKBERRY_QNX__)
  83. msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
  84. #elif defined(__MACH__)
  85. sys_dcache_flush(start, len);
  86. sys_icache_invalidate(start, len);
  87. #elif defined(_3DS)
  88. ctr_flush_invalidate_cache();
  89. #elif defined(VITA)
  90. sceKernelSyncVMDomain(sceBlock, start, len);
  91. #else
  92. __clear_cache(start, end);
  93. #endif
  94. #endif
  95. }
  96. #ifdef _WIN32
  97. /* mmap() replacement for Windows
  98. *
  99. * Author: Mike Frysinger <vapier@gentoo.org>
  100. * Placed into the public domain
  101. */
  102. /* References:
  103. * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
  104. * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
  105. * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
  106. * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
  107. */
  108. #define PROT_READ 0x1
  109. #define PROT_WRITE 0x2
  110. /* This flag is only available in WinXP+ */
  111. #ifdef FILE_MAP_EXECUTE
  112. #define PROT_EXEC 0x4
  113. #else
  114. #define PROT_EXEC 0x0
  115. #define FILE_MAP_EXECUTE 0
  116. #endif
  117. #define MAP_SHARED 0x01
  118. #define MAP_PRIVATE 0x02
  119. #define MAP_ANONYMOUS 0x20
  120. #define MAP_ANON MAP_ANONYMOUS
  121. #define MAP_FAILED ((void *) -1)
  122. #ifdef __USE_FILE_OFFSET64
  123. # define DWORD_HI(x) (x >> 32)
  124. # define DWORD_LO(x) ((x) & 0xffffffff)
  125. #else
  126. # define DWORD_HI(x) (0)
  127. # define DWORD_LO(x) (x)
  128. #endif
  129. static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
  130. {
  131. uint32_t flProtect, dwDesiredAccess;
  132. off_t end;
  133. HANDLE mmap_fd, h;
  134. void *ret;
  135. if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
  136. return MAP_FAILED;
  137. if (fd == -1) {
  138. if (!(flags & MAP_ANON) || offset)
  139. return MAP_FAILED;
  140. } else if (flags & MAP_ANON)
  141. return MAP_FAILED;
  142. if (prot & PROT_WRITE) {
  143. if (prot & PROT_EXEC)
  144. flProtect = PAGE_EXECUTE_READWRITE;
  145. else
  146. flProtect = PAGE_READWRITE;
  147. } else if (prot & PROT_EXEC) {
  148. if (prot & PROT_READ)
  149. flProtect = PAGE_EXECUTE_READ;
  150. else if (prot & PROT_EXEC)
  151. flProtect = PAGE_EXECUTE;
  152. } else
  153. flProtect = PAGE_READONLY;
  154. end = length + offset;
  155. if (fd == -1)
  156. mmap_fd = INVALID_HANDLE_VALUE;
  157. else
  158. mmap_fd = (HANDLE)_get_osfhandle(fd);
  159. h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
  160. if (h == NULL)
  161. return MAP_FAILED;
  162. if (prot & PROT_WRITE)
  163. dwDesiredAccess = FILE_MAP_WRITE;
  164. else
  165. dwDesiredAccess = FILE_MAP_READ;
  166. if (prot & PROT_EXEC)
  167. dwDesiredAccess |= FILE_MAP_EXECUTE;
  168. if (flags & MAP_PRIVATE)
  169. dwDesiredAccess |= FILE_MAP_COPY;
  170. ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
  171. if (ret == NULL) {
  172. CloseHandle(h);
  173. ret = MAP_FAILED;
  174. }
  175. return ret;
  176. }
  177. static void munmap(void *addr, size_t length)
  178. {
  179. UnmapViewOfFile(addr);
  180. /* ruh-ro, we leaked handle from CreateFileMapping() ... */
  181. }
  182. #elif defined(NO_MMAP)
  183. #define PROT_EXEC 0x04
  184. #define MAP_FAILED 0
  185. #define PROT_READ 0
  186. #define PROT_WRITE 0
  187. #define MAP_PRIVATE 0
  188. #define MAP_ANONYMOUS 0
  189. void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
  190. {
  191. return malloc(len);
  192. }
  193. void munmap(void *base_addr, size_t len)
  194. {
  195. free(base_addr);
  196. }
  197. int mprotect(void *addr, size_t len, int prot)
  198. {
  199. /* stub - not really needed at this point since this codepath has no dynarecs */
  200. return 0;
  201. }
  202. #endif
  203. #ifndef MAP_ANONYMOUS
  204. #define MAP_ANONYMOUS MAP_ANON
  205. #endif
  206. #ifdef _3DS
  207. typedef struct
  208. {
  209. unsigned int requested_map;
  210. void* buffer;
  211. }pico_mmap_t;
  212. pico_mmap_t pico_mmaps[] = {
  213. {0x02000000, 0},
  214. {0x06000000, 0},
  215. {NULL, 0}
  216. };
  217. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  218. {
  219. (void)is_fixed;
  220. if (ctr_svchack_successful)
  221. {
  222. pico_mmap_t* pico_mmap;
  223. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  224. {
  225. if ((pico_mmap->requested_map == addr))
  226. {
  227. unsigned int ptr_aligned, tmp;
  228. unsigned int currentHandle;
  229. unsigned int perm = 0b011;
  230. if (need_exec)
  231. perm = 0b111;
  232. size = (size + 0xFFF) & ~0xFFF;
  233. pico_mmap->buffer = malloc(size + 0x1000);
  234. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  235. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  236. if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
  237. {
  238. if (log_cb)
  239. log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
  240. exit(1);
  241. }
  242. svcCloseHandle(currentHandle);
  243. return (void*)pico_mmap->requested_map;
  244. }
  245. }
  246. }
  247. return malloc(size);
  248. }
  249. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  250. {
  251. if (ctr_svchack_successful)
  252. {
  253. pico_mmap_t* pico_mmap;
  254. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  255. {
  256. if ((pico_mmap->requested_map == (unsigned int)ptr))
  257. {
  258. unsigned int ptr_aligned;
  259. unsigned int currentHandle;
  260. void* tmp;
  261. oldsize = (oldsize + 0xFFF) & ~0xFFF;
  262. newsize = (newsize + 0xFFF) & ~0xFFF;
  263. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  264. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  265. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
  266. tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
  267. if(!tmp)
  268. return NULL;
  269. pico_mmap->buffer = tmp;
  270. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  271. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
  272. svcCloseHandle(currentHandle);
  273. return ptr;
  274. }
  275. }
  276. }
  277. return realloc(ptr, newsize);
  278. }
  279. void plat_munmap(void *ptr, size_t size)
  280. {
  281. if (ctr_svchack_successful)
  282. {
  283. pico_mmap_t* pico_mmap;
  284. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  285. {
  286. if ((pico_mmap->requested_map == (unsigned int)ptr))
  287. {
  288. unsigned int ptr_aligned;
  289. unsigned int currentHandle;
  290. size = (size + 0xFFF) & ~0xFFF;
  291. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  292. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  293. svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
  294. svcCloseHandle(currentHandle);
  295. free(pico_mmap->buffer);
  296. pico_mmap->buffer = NULL;
  297. return;
  298. }
  299. }
  300. }
  301. free(ptr);
  302. }
  303. #else
  304. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  305. {
  306. int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  307. void *req, *ret;
  308. req = (void *)(uintptr_t)addr;
  309. ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  310. if (ret == MAP_FAILED) {
  311. if (log_cb)
  312. log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
  313. return NULL;
  314. }
  315. if (addr != 0 && ret != (void *)(uintptr_t)addr) {
  316. if (log_cb)
  317. log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
  318. addr, ret);
  319. if (is_fixed) {
  320. munmap(ret, size);
  321. return NULL;
  322. }
  323. }
  324. return ret;
  325. }
  326. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  327. {
  328. #ifdef __linux__
  329. void *ret = mremap(ptr, oldsize, newsize, 0);
  330. if (ret == MAP_FAILED)
  331. return NULL;
  332. return ret;
  333. #else
  334. void *tmp, *ret;
  335. size_t preserve_size;
  336. preserve_size = oldsize;
  337. if (preserve_size > newsize)
  338. preserve_size = newsize;
  339. tmp = malloc(preserve_size);
  340. if (tmp == NULL)
  341. return NULL;
  342. memcpy(tmp, ptr, preserve_size);
  343. munmap(ptr, oldsize);
  344. ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
  345. MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  346. if (ret == MAP_FAILED) {
  347. free(tmp);
  348. return NULL;
  349. }
  350. memcpy(ret, tmp, preserve_size);
  351. free(tmp);
  352. return ret;
  353. #endif
  354. }
  355. void plat_munmap(void *ptr, size_t size)
  356. {
  357. if (ptr != NULL)
  358. munmap(ptr, size);
  359. }
  360. #endif
  361. // if NULL is returned, static buffer is used
  362. void *plat_mem_get_for_drc(size_t size)
  363. {
  364. void *mem = NULL;
  365. #ifdef VITA
  366. sceKernelGetMemBlockBase(sceBlock, &mem);
  367. #endif
  368. return mem;
  369. }
  370. int plat_mem_set_exec(void *ptr, size_t size)
  371. {
  372. int ret = -1;
  373. #ifdef _WIN32
  374. DWORD oldProtect = 0;
  375. ret = VirtualProtect(ptr, size, PAGE_EXECUTE_READWRITE, &oldProtect);
  376. if (ret == 0 && log_cb)
  377. log_cb(RETRO_LOG_ERROR, "VirtualProtect(%p, %d) failed: %d\n", ptr, (int)size,
  378. GetLastError());
  379. #elif defined(_3DS)
  380. if (ctr_svchack_successful)
  381. {
  382. unsigned int currentHandle;
  383. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  384. ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
  385. size, MEMOP_PROT, 0b111);
  386. svcCloseHandle(currentHandle);
  387. ctr_flush_invalidate_cache();
  388. }
  389. else
  390. {
  391. if (log_cb)
  392. log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
  393. exit(1);
  394. }
  395. #elif defined(VITA)
  396. ret = sceKernelOpenVMDomain();
  397. #else
  398. ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
  399. if (ret != 0 && log_cb)
  400. log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
  401. #endif
  402. return ret;
  403. }
  404. void emu_video_mode_change(int start_line, int line_count, int is_32cols)
  405. {
  406. struct retro_system_av_info av_info;
  407. memset(vout_buf, 0, 320 * 240 * 2);
  408. vout_width = is_32cols ? 256 : 320;
  409. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  410. if (show_overscan == true) line_count += 16;
  411. if (show_overscan == true) start_line -= 8;
  412. vout_height = line_count;
  413. vout_offset = vout_width * start_line;
  414. // Update the geometry
  415. retro_get_system_av_info(&av_info);
  416. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  417. }
  418. void emu_32x_startup(void)
  419. {
  420. PicoDrawSetOutFormat(PDF_RGB555, 0);
  421. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  422. }
  423. void lprintf(const char *fmt, ...)
  424. {
  425. char buffer[256];
  426. va_list ap;
  427. va_start(ap, fmt);
  428. vsprintf(buffer, fmt, ap);
  429. /* TODO - add 'level' param for warning/error messages? */
  430. if (log_cb)
  431. log_cb(RETRO_LOG_INFO, "%s", buffer);
  432. va_end(ap);
  433. }
  434. /* libretro */
  435. void retro_set_environment(retro_environment_t cb)
  436. {
  437. static const struct retro_variable vars[] = {
  438. { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
  439. { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
  440. { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
  441. { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
  442. { "picodrive_region", "Region; Auto|Japan NTSC|Japan PAL|US|Europe" },
  443. { "picodrive_aspect", "Core-provided aspect ratio; PAR|4/3|CRT" },
  444. { "picodrive_overscan", "Show Overscan; disabled|enabled" },
  445. { "picodrive_overclk68k", "68k overclock; disabled|+25%|+50%|+75%|+100%|+200%|+400%" },
  446. #ifdef DRC_SH2
  447. { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
  448. #endif
  449. { NULL, NULL },
  450. };
  451. environ_cb = cb;
  452. cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
  453. }
  454. void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
  455. void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
  456. void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
  457. void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
  458. void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
  459. unsigned retro_api_version(void)
  460. {
  461. return RETRO_API_VERSION;
  462. }
  463. void retro_set_controller_port_device(unsigned port, unsigned device)
  464. {
  465. }
  466. void retro_get_system_info(struct retro_system_info *info)
  467. {
  468. memset(info, 0, sizeof(*info));
  469. info->library_name = "PicoDrive";
  470. #ifndef GIT_VERSION
  471. #define GIT_VERSION ""
  472. #endif
  473. info->library_version = VERSION GIT_VERSION;
  474. info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
  475. info->need_fullpath = true;
  476. }
  477. void retro_get_system_av_info(struct retro_system_av_info *info)
  478. {
  479. float common_width;
  480. memset(info, 0, sizeof(*info));
  481. info->timing.fps = Pico.m.pal ? 50 : 60;
  482. info->timing.sample_rate = 44100;
  483. info->geometry.base_width = vout_width;
  484. info->geometry.base_height = vout_height;
  485. info->geometry.max_width = vout_width;
  486. info->geometry.max_height = vout_height;
  487. common_width = vout_width;
  488. if (user_vout_width != 0)
  489. common_width = user_vout_width;
  490. info->geometry.aspect_ratio = common_width / vout_height;
  491. }
  492. /* savestates */
  493. struct savestate_state {
  494. const char *load_buf;
  495. char *save_buf;
  496. size_t size;
  497. size_t pos;
  498. };
  499. size_t state_read(void *p, size_t size, size_t nmemb, void *file)
  500. {
  501. struct savestate_state *state = file;
  502. size_t bsize = size * nmemb;
  503. if (state->pos + bsize > state->size) {
  504. if (log_cb)
  505. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  506. state->pos + bsize, state->size);
  507. bsize = state->size - state->pos;
  508. if ((int)bsize <= 0)
  509. return 0;
  510. }
  511. memcpy(p, state->load_buf + state->pos, bsize);
  512. state->pos += bsize;
  513. return bsize;
  514. }
  515. size_t state_write(void *p, size_t size, size_t nmemb, void *file)
  516. {
  517. struct savestate_state *state = file;
  518. size_t bsize = size * nmemb;
  519. if (state->pos + bsize > state->size) {
  520. if (log_cb)
  521. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  522. state->pos + bsize, state->size);
  523. bsize = state->size - state->pos;
  524. if ((int)bsize <= 0)
  525. return 0;
  526. }
  527. memcpy(state->save_buf + state->pos, p, bsize);
  528. state->pos += bsize;
  529. return bsize;
  530. }
  531. size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
  532. {
  533. struct savestate_state *state = file;
  534. size_t bsize = size * nmemb;
  535. state->pos += bsize;
  536. return bsize;
  537. }
  538. size_t state_eof(void *file)
  539. {
  540. struct savestate_state *state = file;
  541. return state->pos >= state->size;
  542. }
  543. int state_fseek(void *file, long offset, int whence)
  544. {
  545. struct savestate_state *state = file;
  546. switch (whence) {
  547. case SEEK_SET:
  548. state->pos = offset;
  549. break;
  550. case SEEK_CUR:
  551. state->pos += offset;
  552. break;
  553. case SEEK_END:
  554. state->pos = state->size + offset;
  555. break;
  556. }
  557. return (int)state->pos;
  558. }
  559. /* savestate sizes vary wildly depending if cd/32x or
  560. * carthw is active, so run the whole thing to get size */
  561. size_t retro_serialize_size(void)
  562. {
  563. struct savestate_state state = { 0, };
  564. int ret;
  565. ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
  566. if (ret != 0)
  567. return 0;
  568. return state.pos;
  569. }
  570. bool retro_serialize(void *data, size_t size)
  571. {
  572. struct savestate_state state = { 0, };
  573. int ret;
  574. state.save_buf = data;
  575. state.size = size;
  576. state.pos = 0;
  577. ret = PicoStateFP(&state, 1, NULL, state_write,
  578. NULL, state_fseek);
  579. return ret == 0;
  580. }
  581. bool retro_unserialize(const void *data, size_t size)
  582. {
  583. struct savestate_state state = { 0, };
  584. int ret;
  585. state.load_buf = data;
  586. state.size = size;
  587. state.pos = 0;
  588. ret = PicoStateFP(&state, 0, state_read, NULL,
  589. state_eof, state_fseek);
  590. return ret == 0;
  591. }
  592. typedef struct patch
  593. {
  594. unsigned int addr;
  595. unsigned short data;
  596. unsigned char comp;
  597. } patch;
  598. extern void decode(char *buff, patch *dest);
  599. extern uint16_t m68k_read16(uint32_t a);
  600. extern void m68k_write16(uint32_t a, uint16_t d);
  601. void retro_cheat_reset(void)
  602. {
  603. int i=0;
  604. unsigned int addr;
  605. for (i = 0; i < PicoPatchCount; i++)
  606. {
  607. addr = PicoPatches[i].addr;
  608. if (addr < Pico.romsize) {
  609. if (PicoPatches[i].active)
  610. *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
  611. } else {
  612. if (PicoPatches[i].active)
  613. m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
  614. }
  615. }
  616. PicoPatchUnload();
  617. }
  618. void retro_cheat_set(unsigned index, bool enabled, const char *code)
  619. {
  620. patch pt;
  621. int array_len = PicoPatchCount;
  622. char codeCopy[256];
  623. char *buff;
  624. if (code=='\0') return;
  625. strcpy(codeCopy,code);
  626. buff = strtok(codeCopy,"+");
  627. while (buff != NULL)
  628. {
  629. decode(buff, &pt);
  630. if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
  631. {
  632. log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
  633. return;
  634. }
  635. /* code was good, add it */
  636. if (array_len < PicoPatchCount + 1)
  637. {
  638. void *ptr;
  639. array_len *= 2;
  640. array_len++;
  641. ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
  642. if (ptr == NULL) {
  643. log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
  644. return;
  645. }
  646. PicoPatches = ptr;
  647. }
  648. strcpy(PicoPatches[PicoPatchCount].code, buff);
  649. PicoPatches[PicoPatchCount].active = enabled;
  650. PicoPatches[PicoPatchCount].addr = pt.addr;
  651. PicoPatches[PicoPatchCount].data = pt.data;
  652. PicoPatches[PicoPatchCount].comp = pt.comp;
  653. if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
  654. PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
  655. else
  656. PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
  657. PicoPatchCount++;
  658. buff = strtok(NULL,"+");
  659. }
  660. }
  661. /* multidisk support */
  662. static bool disk_ejected;
  663. static unsigned int disk_current_index;
  664. static unsigned int disk_count;
  665. static struct disks_state {
  666. char *fname;
  667. } disks[8];
  668. static bool disk_set_eject_state(bool ejected)
  669. {
  670. // TODO?
  671. disk_ejected = ejected;
  672. return true;
  673. }
  674. static bool disk_get_eject_state(void)
  675. {
  676. return disk_ejected;
  677. }
  678. static unsigned int disk_get_image_index(void)
  679. {
  680. return disk_current_index;
  681. }
  682. static bool disk_set_image_index(unsigned int index)
  683. {
  684. enum cd_img_type cd_type;
  685. int ret;
  686. if (index >= sizeof(disks) / sizeof(disks[0]))
  687. return false;
  688. if (disks[index].fname == NULL) {
  689. if (log_cb)
  690. log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
  691. // RetroArch specifies "no disk" with index == count,
  692. // so don't fail here..
  693. disk_current_index = index;
  694. return true;
  695. }
  696. if (log_cb)
  697. log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
  698. disks[index].fname);
  699. ret = -1;
  700. cd_type = PicoCdCheck(disks[index].fname, NULL);
  701. if (cd_type != CIT_NOT_CD)
  702. ret = cdd_load(disks[index].fname, cd_type);
  703. if (ret != 0) {
  704. if (log_cb)
  705. log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
  706. return 0;
  707. }
  708. disk_current_index = index;
  709. return true;
  710. }
  711. static unsigned int disk_get_num_images(void)
  712. {
  713. return disk_count;
  714. }
  715. static bool disk_replace_image_index(unsigned index,
  716. const struct retro_game_info *info)
  717. {
  718. bool ret = true;
  719. if (index >= sizeof(disks) / sizeof(disks[0]))
  720. return false;
  721. if (disks[index].fname != NULL)
  722. free(disks[index].fname);
  723. disks[index].fname = NULL;
  724. if (info != NULL) {
  725. disks[index].fname = strdup(info->path);
  726. if (index == disk_current_index)
  727. ret = disk_set_image_index(index);
  728. }
  729. return ret;
  730. }
  731. static bool disk_add_image_index(void)
  732. {
  733. if (disk_count >= sizeof(disks) / sizeof(disks[0]))
  734. return false;
  735. disk_count++;
  736. return true;
  737. }
  738. static struct retro_disk_control_callback disk_control = {
  739. disk_set_eject_state,
  740. disk_get_eject_state,
  741. disk_get_image_index,
  742. disk_set_image_index,
  743. disk_get_num_images,
  744. disk_replace_image_index,
  745. disk_add_image_index,
  746. };
  747. static void disk_tray_open(void)
  748. {
  749. if (log_cb)
  750. log_cb(RETRO_LOG_INFO, "cd tray open\n");
  751. disk_ejected = 1;
  752. }
  753. static void disk_tray_close(void)
  754. {
  755. if (log_cb)
  756. log_cb(RETRO_LOG_INFO, "cd tray close\n");
  757. disk_ejected = 0;
  758. }
  759. static const char * const biosfiles_us[] = {
  760. "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
  761. };
  762. static const char * const biosfiles_eu[] = {
  763. "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
  764. };
  765. static const char * const biosfiles_jp[] = {
  766. "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
  767. };
  768. static void make_system_path(char *buf, size_t buf_size,
  769. const char *name, const char *ext)
  770. {
  771. const char *dir = NULL;
  772. if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
  773. snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
  774. }
  775. else {
  776. snprintf(buf, buf_size, "%s%s", name, ext);
  777. }
  778. }
  779. static const char *find_bios(int *region, const char *cd_fname)
  780. {
  781. const char * const *files;
  782. static char path[256];
  783. int i, count;
  784. FILE *f = NULL;
  785. if (*region == 4) { // US
  786. files = biosfiles_us;
  787. count = sizeof(biosfiles_us) / sizeof(char *);
  788. } else if (*region == 8) { // EU
  789. files = biosfiles_eu;
  790. count = sizeof(biosfiles_eu) / sizeof(char *);
  791. } else if (*region == 1 || *region == 2) {
  792. files = biosfiles_jp;
  793. count = sizeof(biosfiles_jp) / sizeof(char *);
  794. } else {
  795. return NULL;
  796. }
  797. for (i = 0; i < count; i++)
  798. {
  799. make_system_path(path, sizeof(path), files[i], ".bin");
  800. f = fopen(path, "rb");
  801. if (f != NULL)
  802. break;
  803. make_system_path(path, sizeof(path), files[i], ".zip");
  804. f = fopen(path, "rb");
  805. if (f != NULL)
  806. break;
  807. }
  808. if (f != NULL) {
  809. if (log_cb)
  810. log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
  811. fclose(f);
  812. return path;
  813. }
  814. return NULL;
  815. }
  816. bool retro_load_game(const struct retro_game_info *info)
  817. {
  818. enum media_type_e media_type;
  819. static char carthw_path[256];
  820. size_t i;
  821. struct retro_input_descriptor desc[] = {
  822. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  823. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  824. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  825. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  826. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  827. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  828. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  829. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  830. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  831. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  832. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  833. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  834. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  835. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  836. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  837. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  838. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  839. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  840. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  841. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  842. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  843. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  844. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  845. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  846. { 0 },
  847. };
  848. struct retro_input_descriptor desc_sms[] = {
  849. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  850. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  851. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  852. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  853. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  854. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  855. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  856. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  857. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  858. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  859. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  860. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  861. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  862. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  863. { 0 },
  864. };
  865. enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
  866. if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
  867. if (log_cb)
  868. log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
  869. return false;
  870. }
  871. if (info == NULL || info->path == NULL) {
  872. if (log_cb)
  873. log_cb(RETRO_LOG_ERROR, "info->path required\n");
  874. return false;
  875. }
  876. for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
  877. if (disks[i].fname != NULL) {
  878. free(disks[i].fname);
  879. disks[i].fname = NULL;
  880. }
  881. }
  882. disk_current_index = 0;
  883. disk_count = 1;
  884. disks[0].fname = strdup(info->path);
  885. make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
  886. media_type = PicoLoadMedia(info->path, carthw_path,
  887. find_bios, NULL);
  888. switch (media_type) {
  889. case PM_BAD_DETECT:
  890. if (log_cb)
  891. log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
  892. return false;
  893. case PM_BAD_CD:
  894. if (log_cb)
  895. log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
  896. return false;
  897. case PM_BAD_CD_NO_BIOS:
  898. if (log_cb)
  899. log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
  900. return false;
  901. case PM_ERROR:
  902. if (log_cb)
  903. log_cb(RETRO_LOG_ERROR, "Load error\n");
  904. return false;
  905. default:
  906. break;
  907. }
  908. if (media_type == PM_MARK3)
  909. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
  910. else
  911. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
  912. PicoLoopPrepare();
  913. PicoIn.writeSound = snd_write;
  914. memset(sndBuffer, 0, sizeof(sndBuffer));
  915. PicoIn.sndOut = sndBuffer;
  916. PsndRerate(0);
  917. return true;
  918. }
  919. bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
  920. {
  921. return false;
  922. }
  923. void retro_unload_game(void)
  924. {
  925. }
  926. unsigned retro_get_region(void)
  927. {
  928. return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
  929. }
  930. void *retro_get_memory_data(unsigned type)
  931. {
  932. uint8_t* data;
  933. switch(type)
  934. {
  935. case RETRO_MEMORY_SAVE_RAM:
  936. if (PicoIn.AHW & PAHW_MCD)
  937. data = Pico_mcd->bram;
  938. else
  939. data = Pico.sv.data;
  940. break;
  941. case RETRO_MEMORY_SYSTEM_RAM:
  942. if (PicoIn.AHW & PAHW_SMS)
  943. data = PicoMem.zram;
  944. else
  945. data = PicoMem.ram;
  946. break;
  947. default:
  948. data = NULL;
  949. break;
  950. }
  951. return data;
  952. }
  953. size_t retro_get_memory_size(unsigned type)
  954. {
  955. unsigned int i;
  956. int sum;
  957. switch(type)
  958. {
  959. case RETRO_MEMORY_SAVE_RAM:
  960. if (PicoIn.AHW & PAHW_MCD)
  961. // bram
  962. return 0x2000;
  963. if (Pico.m.frame_count == 0)
  964. return Pico.sv.size;
  965. // if game doesn't write to sram, don't report it to
  966. // libretro so that RA doesn't write out zeroed .srm
  967. for (i = 0, sum = 0; i < Pico.sv.size; i++)
  968. sum |= Pico.sv.data[i];
  969. return (sum != 0) ? Pico.sv.size : 0;
  970. case RETRO_MEMORY_SYSTEM_RAM:
  971. if (PicoIn.AHW & PAHW_SMS)
  972. return 0x2000;
  973. else
  974. return sizeof(PicoMem.ram);
  975. default:
  976. return 0;
  977. }
  978. }
  979. void retro_reset(void)
  980. {
  981. PicoReset();
  982. }
  983. static const unsigned short retro_pico_map[] = {
  984. 1 << GBTN_B,
  985. 1 << GBTN_A,
  986. 1 << GBTN_MODE,
  987. 1 << GBTN_START,
  988. 1 << GBTN_UP,
  989. 1 << GBTN_DOWN,
  990. 1 << GBTN_LEFT,
  991. 1 << GBTN_RIGHT,
  992. 1 << GBTN_C,
  993. 1 << GBTN_Y,
  994. 1 << GBTN_X,
  995. 1 << GBTN_Z,
  996. };
  997. #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
  998. static void snd_write(int len)
  999. {
  1000. audio_batch_cb(PicoIn.sndOut, len / 4);
  1001. }
  1002. static enum input_device input_name_to_val(const char *name)
  1003. {
  1004. if (strcmp(name, "3 button pad") == 0)
  1005. return PICO_INPUT_PAD_3BTN;
  1006. if (strcmp(name, "6 button pad") == 0)
  1007. return PICO_INPUT_PAD_6BTN;
  1008. if (strcmp(name, "None") == 0)
  1009. return PICO_INPUT_NOTHING;
  1010. if (log_cb)
  1011. log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
  1012. return PICO_INPUT_PAD_3BTN;
  1013. }
  1014. static void update_variables(void)
  1015. {
  1016. struct retro_variable var;
  1017. int OldPicoRegionOverride;
  1018. float old_user_vout_width;
  1019. var.value = NULL;
  1020. var.key = "picodrive_input1";
  1021. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1022. PicoSetInputDevice(0, input_name_to_val(var.value));
  1023. var.value = NULL;
  1024. var.key = "picodrive_input2";
  1025. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1026. PicoSetInputDevice(1, input_name_to_val(var.value));
  1027. var.value = NULL;
  1028. var.key = "picodrive_sprlim";
  1029. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1030. if (strcmp(var.value, "enabled") == 0)
  1031. PicoIn.opt |= POPT_DIS_SPRITE_LIM;
  1032. else
  1033. PicoIn.opt &= ~POPT_DIS_SPRITE_LIM;
  1034. }
  1035. var.value = NULL;
  1036. var.key = "picodrive_ramcart";
  1037. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1038. if (strcmp(var.value, "enabled") == 0)
  1039. PicoIn.opt |= POPT_EN_MCD_RAMCART;
  1040. else
  1041. PicoIn.opt &= ~POPT_EN_MCD_RAMCART;
  1042. }
  1043. OldPicoRegionOverride = PicoIn.regionOverride;
  1044. var.value = NULL;
  1045. var.key = "picodrive_region";
  1046. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1047. if (strcmp(var.value, "Auto") == 0)
  1048. PicoIn.regionOverride = 0;
  1049. else if (strcmp(var.value, "Japan NTSC") == 0)
  1050. PicoIn.regionOverride = 1;
  1051. else if (strcmp(var.value, "Japan PAL") == 0)
  1052. PicoIn.regionOverride = 2;
  1053. else if (strcmp(var.value, "US") == 0)
  1054. PicoIn.regionOverride = 4;
  1055. else if (strcmp(var.value, "Europe") == 0)
  1056. PicoIn.regionOverride = 8;
  1057. }
  1058. // Update region, fps and sound flags if needed
  1059. if (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)
  1060. {
  1061. PicoDetectRegion();
  1062. PicoLoopPrepare();
  1063. PsndRerate(1);
  1064. }
  1065. old_user_vout_width = user_vout_width;
  1066. var.value = NULL;
  1067. var.key = "picodrive_aspect";
  1068. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1069. if (strcmp(var.value, "4/3") == 0)
  1070. user_vout_width = VOUT_4_3;
  1071. else if (strcmp(var.value, "CRT") == 0)
  1072. user_vout_width = VOUT_CRT;
  1073. else
  1074. user_vout_width = VOUT_PAR;
  1075. }
  1076. var.value = NULL;
  1077. var.key = "picodrive_overscan";
  1078. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1079. if (strcmp(var.value, "enabled") == 0)
  1080. show_overscan = true;
  1081. else
  1082. show_overscan = false;
  1083. }
  1084. if (user_vout_width != old_user_vout_width)
  1085. {
  1086. // Update the geometry
  1087. struct retro_system_av_info av_info;
  1088. retro_get_system_av_info(&av_info);
  1089. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  1090. }
  1091. var.value = NULL;
  1092. var.key = "picodrive_overclk68k";
  1093. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1094. PicoIn.overclockM68k = 0;
  1095. if (var.value[0] == '+')
  1096. PicoIn.overclockM68k = atoi(var.value + 1);
  1097. }
  1098. #ifdef DRC_SH2
  1099. var.value = NULL;
  1100. var.key = "picodrive_drc";
  1101. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1102. if (strcmp(var.value, "enabled") == 0)
  1103. PicoIn.opt |= POPT_EN_DRC;
  1104. else
  1105. PicoIn.opt &= ~POPT_EN_DRC;
  1106. }
  1107. #endif
  1108. #ifdef _3DS
  1109. if(!ctr_svchack_successful)
  1110. PicoIn.opt &= ~POPT_EN_DRC;
  1111. #endif
  1112. }
  1113. void retro_run(void)
  1114. {
  1115. bool updated = false;
  1116. int pad, i;
  1117. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
  1118. update_variables();
  1119. input_poll_cb();
  1120. PicoIn.pad[0] = PicoIn.pad[1] = 0;
  1121. for (pad = 0; pad < 2; pad++)
  1122. for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
  1123. if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
  1124. PicoIn.pad[pad] |= retro_pico_map[i];
  1125. PicoPatchApply();
  1126. PicoFrame();
  1127. video_cb((short *)vout_buf + vout_offset,
  1128. vout_width, vout_height, vout_width * 2);
  1129. }
  1130. void retro_init(void)
  1131. {
  1132. struct retro_log_callback log;
  1133. int level;
  1134. level = 0;
  1135. environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
  1136. if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
  1137. log_cb = log.log;
  1138. else
  1139. log_cb = NULL;
  1140. environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
  1141. #ifdef _3DS
  1142. ctr_svchack_successful = ctr_svchack_init();
  1143. #elif defined(VITA)
  1144. sceBlock = getVMBlock();
  1145. #endif
  1146. PicoIn.opt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80|POPT_EN_YM2413
  1147. | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
  1148. | POPT_EN_32X|POPT_EN_PWM
  1149. | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
  1150. #ifdef __arm__
  1151. #ifdef _3DS
  1152. if (ctr_svchack_successful)
  1153. #endif
  1154. PicoIn.opt |= POPT_EN_DRC;
  1155. #endif
  1156. PicoIn.sndRate = 44100;
  1157. PicoIn.autoRgnOrder = 0x184; // US, EU, JP
  1158. vout_width = 320;
  1159. vout_height = 240;
  1160. #ifdef _3DS
  1161. vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
  1162. #else
  1163. vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  1164. #endif
  1165. PicoInit();
  1166. PicoDrawSetOutFormat(PDF_RGB555, 0);
  1167. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  1168. //PicoIn.osdMessage = plat_status_msg_busy_next;
  1169. PicoIn.mcdTrayOpen = disk_tray_open;
  1170. PicoIn.mcdTrayClose = disk_tray_close;
  1171. update_variables();
  1172. }
  1173. void retro_deinit(void)
  1174. {
  1175. #ifdef _3DS
  1176. linearFree(vout_buf);
  1177. #else
  1178. free(vout_buf);
  1179. #endif
  1180. vout_buf = NULL;
  1181. PicoExit();
  1182. }
  1183. // vim:shiftwidth=3:ts=3:expandtab