libretro.c 48 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. #ifdef __SWITCH__
  18. #include "../switch/mman.h"
  19. #else
  20. #include <sys/mman.h>
  21. #endif
  22. #endif
  23. #else
  24. #include <io.h>
  25. #include <windows.h>
  26. #include <sys/types.h>
  27. #endif
  28. #include <errno.h>
  29. #ifdef __MACH__
  30. #include <libkern/OSCacheControl.h>
  31. #endif
  32. #ifdef USE_LIBRETRO_VFS
  33. #include "file_stream_transforms.h"
  34. #endif
  35. #if defined(RENDER_GSKIT_PS2)
  36. #include "libretro-common/include/libretro_gskit_ps2.h"
  37. #include "../ps2/asm.h"
  38. #endif
  39. #ifdef _3DS
  40. #include "3ds/3ds_utils.h"
  41. #define MEMOP_MAP 4
  42. #define MEMOP_UNMAP 5
  43. #define MEMOP_PROT 6
  44. int svcDuplicateHandle(unsigned int* out, unsigned int original);
  45. int svcCloseHandle(unsigned int handle);
  46. int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
  47. unsigned int size, unsigned int type, unsigned int perm);
  48. void* linearMemAlign(size_t size, size_t alignment);
  49. void linearFree(void* mem);
  50. static int ctr_svchack_successful = 0;
  51. #elif defined(VITA)
  52. #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
  53. #include <psp2/kernel/sysmem.h>
  54. static int sceBlock;
  55. int getVMBlock();
  56. int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
  57. #endif
  58. #include "libretro_core_options.h"
  59. #include <pico/pico_int.h>
  60. #include <pico/state.h>
  61. #include <pico/patch.h>
  62. #include "../common/input_pico.h"
  63. #include "../common/version.h"
  64. #include <libretro.h>
  65. static retro_log_printf_t log_cb;
  66. static retro_video_refresh_t video_cb;
  67. static retro_input_poll_t input_poll_cb;
  68. static retro_input_state_t input_state_cb;
  69. static retro_environment_t environ_cb;
  70. static retro_audio_sample_batch_t audio_batch_cb;
  71. #if defined(RENDER_GSKIT_PS2)
  72. #define VOUT_MAX_WIDTH 328
  73. #else
  74. #define VOUT_MAX_WIDTH 320
  75. #define VOUT_32BIT_WIDTH 256
  76. #endif
  77. #define VOUT_MAX_HEIGHT 240
  78. #define INITIAL_SND_RATE 44100
  79. static const float VOUT_PAR = 0.0;
  80. static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
  81. static const float VOUT_CRT = (224.0f * 1.29911f);
  82. static bool show_overscan = false;
  83. static bool old_show_overscan = false;
  84. /* Required to allow on the fly changes to 'show overscan' */
  85. static int vm_current_start_line = -1;
  86. static int vm_current_line_count = -1;
  87. static int vm_current_is_32cols = -1;
  88. static void *vout_buf;
  89. static int vout_width, vout_height, vout_offset;
  90. static float user_vout_width = 0.0;
  91. #if defined(RENDER_GSKIT_PS2)
  92. RETRO_HW_RENDER_INTEFACE_GSKIT_PS2 *ps2 = NULL;
  93. static void *retro_palette;
  94. static struct retro_hw_ps2_insets padding;
  95. #endif
  96. static short ALIGNED(4) sndBuffer[2*INITIAL_SND_RATE/50];
  97. static void snd_write(int len);
  98. char **g_argv;
  99. #ifdef _WIN32
  100. #define SLASH '\\'
  101. #else
  102. #define SLASH '/'
  103. #endif
  104. /* Frameskipping Support */
  105. static unsigned frameskip_type = 0;
  106. static unsigned frameskip_threshold = 0;
  107. static uint16_t frameskip_counter = 0;
  108. static bool retro_audio_buff_active = false;
  109. static unsigned retro_audio_buff_occupancy = 0;
  110. static bool retro_audio_buff_underrun = false;
  111. /* Maximum number of consecutive frames that
  112. * can be skipped */
  113. #define FRAMESKIP_MAX 60
  114. static unsigned audio_latency = 0;
  115. static bool update_audio_latency = false;
  116. static void retro_audio_buff_status_cb(
  117. bool active, unsigned occupancy, bool underrun_likely)
  118. {
  119. retro_audio_buff_active = active;
  120. retro_audio_buff_occupancy = occupancy;
  121. retro_audio_buff_underrun = underrun_likely;
  122. }
  123. static void init_frameskip(void)
  124. {
  125. if (frameskip_type > 0)
  126. {
  127. struct retro_audio_buffer_status_callback buf_status_cb;
  128. buf_status_cb.callback = retro_audio_buff_status_cb;
  129. if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK,
  130. &buf_status_cb))
  131. {
  132. if (log_cb)
  133. log_cb(RETRO_LOG_WARN, "Frameskip disabled - frontend does not support audio buffer status monitoring.\n");
  134. retro_audio_buff_active = false;
  135. retro_audio_buff_occupancy = 0;
  136. retro_audio_buff_underrun = false;
  137. audio_latency = 0;
  138. }
  139. else
  140. {
  141. /* Frameskip is enabled - increase frontend
  142. * audio latency to minimise potential
  143. * buffer underruns */
  144. float frame_time_msec = 1000.0f / (Pico.m.pal ? 50.0f : 60.0f);
  145. /* Set latency to 6x current frame time... */
  146. audio_latency = (unsigned)((6.0f * frame_time_msec) + 0.5f);
  147. /* ...then round up to nearest multiple of 32 */
  148. audio_latency = (audio_latency + 0x1F) & ~0x1F;
  149. }
  150. }
  151. else
  152. {
  153. environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL);
  154. audio_latency = 0;
  155. }
  156. update_audio_latency = true;
  157. }
  158. /* functions called by the core */
  159. void cache_flush_d_inval_i(void *start, void *end)
  160. {
  161. #ifdef __arm__
  162. size_t len = (char *)end - (char *)start;
  163. (void)len;
  164. #if defined(__BLACKBERRY_QNX__)
  165. msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
  166. #elif defined(__MACH__)
  167. sys_dcache_flush(start, len);
  168. sys_icache_invalidate(start, len);
  169. #elif defined(_3DS)
  170. ctr_flush_invalidate_cache();
  171. #elif defined(VITA)
  172. sceKernelSyncVMDomain(sceBlock, start, len);
  173. #else
  174. __clear_cache(start, end);
  175. #endif
  176. #endif
  177. }
  178. #ifdef _WIN32
  179. /* mmap() replacement for Windows
  180. *
  181. * Author: Mike Frysinger <vapier@gentoo.org>
  182. * Placed into the public domain
  183. */
  184. /* References:
  185. * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
  186. * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
  187. * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
  188. * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
  189. */
  190. #define PROT_READ 0x1
  191. #define PROT_WRITE 0x2
  192. /* This flag is only available in WinXP+ */
  193. #ifdef FILE_MAP_EXECUTE
  194. #define PROT_EXEC 0x4
  195. #else
  196. #define PROT_EXEC 0x0
  197. #define FILE_MAP_EXECUTE 0
  198. #endif
  199. #define MAP_SHARED 0x01
  200. #define MAP_PRIVATE 0x02
  201. #define MAP_ANONYMOUS 0x20
  202. #define MAP_ANON MAP_ANONYMOUS
  203. #define MAP_FAILED ((void *) -1)
  204. #ifdef __USE_FILE_OFFSET64
  205. # define DWORD_HI(x) (x >> 32)
  206. # define DWORD_LO(x) ((x) & 0xffffffff)
  207. #else
  208. # define DWORD_HI(x) (0)
  209. # define DWORD_LO(x) (x)
  210. #endif
  211. static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
  212. {
  213. uint32_t flProtect, dwDesiredAccess;
  214. off_t end;
  215. HANDLE mmap_fd, h;
  216. void *ret;
  217. if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
  218. return MAP_FAILED;
  219. if (fd == -1) {
  220. if (!(flags & MAP_ANON) || offset)
  221. return MAP_FAILED;
  222. } else if (flags & MAP_ANON)
  223. return MAP_FAILED;
  224. if (prot & PROT_WRITE) {
  225. if (prot & PROT_EXEC)
  226. flProtect = PAGE_EXECUTE_READWRITE;
  227. else
  228. flProtect = PAGE_READWRITE;
  229. } else if (prot & PROT_EXEC) {
  230. if (prot & PROT_READ)
  231. flProtect = PAGE_EXECUTE_READ;
  232. else if (prot & PROT_EXEC)
  233. flProtect = PAGE_EXECUTE;
  234. } else
  235. flProtect = PAGE_READONLY;
  236. end = length + offset;
  237. if (fd == -1)
  238. mmap_fd = INVALID_HANDLE_VALUE;
  239. else
  240. mmap_fd = (HANDLE)_get_osfhandle(fd);
  241. h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
  242. if (h == NULL)
  243. return MAP_FAILED;
  244. if (prot & PROT_WRITE)
  245. dwDesiredAccess = FILE_MAP_WRITE;
  246. else
  247. dwDesiredAccess = FILE_MAP_READ;
  248. if (prot & PROT_EXEC)
  249. dwDesiredAccess |= FILE_MAP_EXECUTE;
  250. if (flags & MAP_PRIVATE)
  251. dwDesiredAccess |= FILE_MAP_COPY;
  252. ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
  253. if (ret == NULL) {
  254. CloseHandle(h);
  255. ret = MAP_FAILED;
  256. }
  257. return ret;
  258. }
  259. static void munmap(void *addr, size_t length)
  260. {
  261. UnmapViewOfFile(addr);
  262. /* ruh-ro, we leaked handle from CreateFileMapping() ... */
  263. }
  264. #elif defined(NO_MMAP)
  265. #define PROT_EXEC 0x04
  266. #define MAP_FAILED 0
  267. #define PROT_READ 0
  268. #define PROT_WRITE 0
  269. #define MAP_PRIVATE 0
  270. #define MAP_ANONYMOUS 0
  271. void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
  272. {
  273. return malloc(len);
  274. }
  275. void munmap(void *base_addr, size_t len)
  276. {
  277. free(base_addr);
  278. }
  279. int mprotect(void *addr, size_t len, int prot)
  280. {
  281. /* stub - not really needed at this point since this codepath has no dynarecs */
  282. return 0;
  283. }
  284. #endif
  285. #ifndef MAP_ANONYMOUS
  286. #define MAP_ANONYMOUS MAP_ANON
  287. #endif
  288. #ifdef _3DS
  289. typedef struct
  290. {
  291. unsigned int requested_map;
  292. void* buffer;
  293. }pico_mmap_t;
  294. pico_mmap_t pico_mmaps[] = {
  295. {0x02000000, 0},
  296. {0x06000000, 0},
  297. {NULL, 0}
  298. };
  299. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  300. {
  301. (void)is_fixed;
  302. if (ctr_svchack_successful)
  303. {
  304. pico_mmap_t* pico_mmap;
  305. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  306. {
  307. if ((pico_mmap->requested_map == addr))
  308. {
  309. unsigned int ptr_aligned, tmp;
  310. unsigned int currentHandle;
  311. unsigned int perm = 0b011;
  312. if (need_exec)
  313. perm = 0b111;
  314. size = (size + 0xFFF) & ~0xFFF;
  315. pico_mmap->buffer = malloc(size + 0x1000);
  316. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  317. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  318. if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
  319. {
  320. if (log_cb)
  321. log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
  322. exit(1);
  323. }
  324. svcCloseHandle(currentHandle);
  325. return (void*)pico_mmap->requested_map;
  326. }
  327. }
  328. }
  329. return malloc(size);
  330. }
  331. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  332. {
  333. if (ctr_svchack_successful)
  334. {
  335. pico_mmap_t* pico_mmap;
  336. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  337. {
  338. if ((pico_mmap->requested_map == (unsigned int)ptr))
  339. {
  340. unsigned int ptr_aligned;
  341. unsigned int currentHandle;
  342. void* tmp;
  343. oldsize = (oldsize + 0xFFF) & ~0xFFF;
  344. newsize = (newsize + 0xFFF) & ~0xFFF;
  345. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  346. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  347. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
  348. tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
  349. if(!tmp)
  350. return NULL;
  351. pico_mmap->buffer = tmp;
  352. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  353. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
  354. svcCloseHandle(currentHandle);
  355. return ptr;
  356. }
  357. }
  358. }
  359. return realloc(ptr, newsize);
  360. }
  361. void plat_munmap(void *ptr, size_t size)
  362. {
  363. if (ctr_svchack_successful)
  364. {
  365. pico_mmap_t* pico_mmap;
  366. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  367. {
  368. if ((pico_mmap->requested_map == (unsigned int)ptr))
  369. {
  370. unsigned int ptr_aligned;
  371. unsigned int currentHandle;
  372. size = (size + 0xFFF) & ~0xFFF;
  373. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  374. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  375. svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
  376. svcCloseHandle(currentHandle);
  377. free(pico_mmap->buffer);
  378. pico_mmap->buffer = NULL;
  379. return;
  380. }
  381. }
  382. }
  383. free(ptr);
  384. }
  385. #else
  386. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  387. {
  388. int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  389. void *req, *ret;
  390. req = (void *)(uintptr_t)addr;
  391. ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  392. if (ret == MAP_FAILED) {
  393. if (log_cb)
  394. log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
  395. return NULL;
  396. }
  397. if (addr != 0 && ret != (void *)(uintptr_t)addr) {
  398. if (log_cb)
  399. log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
  400. addr, ret);
  401. if (is_fixed) {
  402. munmap(ret, size);
  403. return NULL;
  404. }
  405. }
  406. return ret;
  407. }
  408. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  409. {
  410. #if defined(__linux__) && !defined(__SWITCH__)
  411. void *ret = mremap(ptr, oldsize, newsize, 0);
  412. if (ret == MAP_FAILED)
  413. return NULL;
  414. return ret;
  415. #else
  416. void *tmp, *ret;
  417. size_t preserve_size;
  418. preserve_size = oldsize;
  419. if (preserve_size > newsize)
  420. preserve_size = newsize;
  421. tmp = malloc(preserve_size);
  422. if (tmp == NULL)
  423. return NULL;
  424. memcpy(tmp, ptr, preserve_size);
  425. munmap(ptr, oldsize);
  426. ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
  427. MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  428. if (ret == MAP_FAILED) {
  429. free(tmp);
  430. return NULL;
  431. }
  432. memcpy(ret, tmp, preserve_size);
  433. free(tmp);
  434. return ret;
  435. #endif
  436. }
  437. void plat_munmap(void *ptr, size_t size)
  438. {
  439. if (ptr != NULL)
  440. munmap(ptr, size);
  441. }
  442. #endif
  443. // if NULL is returned, static buffer is used
  444. void *plat_mem_get_for_drc(size_t size)
  445. {
  446. void *mem = NULL;
  447. #ifdef VITA
  448. sceKernelGetMemBlockBase(sceBlock, &mem);
  449. #endif
  450. return mem;
  451. }
  452. int plat_mem_set_exec(void *ptr, size_t size)
  453. {
  454. int ret = -1;
  455. #ifdef _WIN32
  456. DWORD oldProtect = 0;
  457. ret = VirtualProtect(ptr, size, PAGE_EXECUTE_READWRITE, &oldProtect);
  458. if (ret == 0 && log_cb)
  459. log_cb(RETRO_LOG_ERROR, "VirtualProtect(%p, %d) failed: %d\n", ptr, (int)size,
  460. GetLastError());
  461. #elif defined(_3DS)
  462. if (ctr_svchack_successful)
  463. {
  464. unsigned int currentHandle;
  465. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  466. ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
  467. size, MEMOP_PROT, 0b111);
  468. svcCloseHandle(currentHandle);
  469. ctr_flush_invalidate_cache();
  470. }
  471. else
  472. {
  473. if (log_cb)
  474. log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
  475. exit(1);
  476. }
  477. #elif defined(VITA)
  478. ret = sceKernelOpenVMDomain();
  479. #else
  480. ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
  481. if (ret != 0 && log_cb)
  482. log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
  483. #endif
  484. return ret;
  485. }
  486. void emu_video_mode_change(int start_line, int line_count, int is_32cols)
  487. {
  488. struct retro_system_av_info av_info;
  489. vm_current_start_line = start_line;
  490. vm_current_line_count = line_count;
  491. vm_current_is_32cols = is_32cols;
  492. #if defined(RENDER_GSKIT_PS2)
  493. if (is_32cols) {
  494. padding = (struct retro_hw_ps2_insets){start_line, 16.0f, VOUT_MAX_HEIGHT - line_count - start_line, 64.0f};
  495. } else {
  496. padding = (struct retro_hw_ps2_insets){start_line, 16.0f, VOUT_MAX_HEIGHT - line_count - start_line, 0.0f};
  497. }
  498. vout_width = VOUT_MAX_WIDTH;
  499. vout_height = VOUT_MAX_HEIGHT;
  500. memset(vout_buf, 0, vout_width * VOUT_MAX_HEIGHT);
  501. memset(retro_palette, 0, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
  502. PicoDrawSetOutBuf(vout_buf, vout_width);
  503. #else
  504. vout_width = is_32cols ? VOUT_32BIT_WIDTH : VOUT_MAX_WIDTH;
  505. memset(vout_buf, 0, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  506. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  507. if (show_overscan)
  508. {
  509. vout_height = line_count + (start_line * 2);
  510. vout_offset = 0;
  511. }
  512. else
  513. {
  514. vout_height = line_count;
  515. /* Note: We multiply by 2 here to account for pitch */
  516. vout_offset = vout_width * start_line * 2;
  517. }
  518. /* Redundant sanity check... */
  519. vout_height = (vout_height > VOUT_MAX_HEIGHT) ?
  520. VOUT_MAX_HEIGHT : vout_height;
  521. vout_offset = (vout_offset > vout_width * (VOUT_MAX_HEIGHT - 1) * 2) ?
  522. vout_width * (VOUT_MAX_HEIGHT - 1) * 2 : vout_offset;
  523. #endif
  524. // Update the geometry
  525. retro_get_system_av_info(&av_info);
  526. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  527. }
  528. void emu_32x_startup(void)
  529. {
  530. PicoDrawSetOutFormat(PDF_RGB555, 0);
  531. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  532. }
  533. void lprintf(const char *fmt, ...)
  534. {
  535. char buffer[256];
  536. va_list ap;
  537. va_start(ap, fmt);
  538. vsprintf(buffer, fmt, ap);
  539. /* TODO - add 'level' param for warning/error messages? */
  540. if (log_cb)
  541. log_cb(RETRO_LOG_INFO, "%s", buffer);
  542. va_end(ap);
  543. }
  544. /* libretro */
  545. void retro_set_environment(retro_environment_t cb)
  546. {
  547. #ifdef USE_LIBRETRO_VFS
  548. struct retro_vfs_interface_info vfs_iface_info;
  549. #endif
  550. environ_cb = cb;
  551. libretro_set_core_options(environ_cb);
  552. #ifdef USE_LIBRETRO_VFS
  553. vfs_iface_info.required_interface_version = 1;
  554. vfs_iface_info.iface = NULL;
  555. if (environ_cb(RETRO_ENVIRONMENT_GET_VFS_INTERFACE, &vfs_iface_info))
  556. filestream_vfs_init(&vfs_iface_info);
  557. #endif
  558. }
  559. void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
  560. void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
  561. void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
  562. void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
  563. void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
  564. unsigned retro_api_version(void)
  565. {
  566. return RETRO_API_VERSION;
  567. }
  568. void retro_set_controller_port_device(unsigned port, unsigned device)
  569. {
  570. }
  571. void retro_get_system_info(struct retro_system_info *info)
  572. {
  573. memset(info, 0, sizeof(*info));
  574. info->library_name = "PicoDrive";
  575. #ifndef GIT_VERSION
  576. #define GIT_VERSION ""
  577. #endif
  578. info->library_version = VERSION GIT_VERSION;
  579. info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
  580. info->need_fullpath = true;
  581. }
  582. void retro_get_system_av_info(struct retro_system_av_info *info)
  583. {
  584. float common_width;
  585. memset(info, 0, sizeof(*info));
  586. info->timing.fps = Pico.m.pal ? 50 : 60;
  587. info->timing.sample_rate = PicoIn.sndRate;
  588. info->geometry.base_width = vout_width;
  589. info->geometry.base_height = vout_height;
  590. info->geometry.max_width = vout_width;
  591. info->geometry.max_height = vout_height;
  592. common_width = vout_width;
  593. if (user_vout_width != 0)
  594. common_width = user_vout_width;
  595. info->geometry.aspect_ratio = common_width / vout_height;
  596. }
  597. /* savestates */
  598. struct savestate_state {
  599. const char *load_buf;
  600. char *save_buf;
  601. size_t size;
  602. size_t pos;
  603. };
  604. size_t state_read(void *p, size_t size, size_t nmemb, void *file)
  605. {
  606. struct savestate_state *state = file;
  607. size_t bsize = size * nmemb;
  608. if (state->pos + bsize > state->size) {
  609. if (log_cb)
  610. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  611. state->pos + bsize, state->size);
  612. bsize = state->size - state->pos;
  613. if ((int)bsize <= 0)
  614. return 0;
  615. }
  616. memcpy(p, state->load_buf + state->pos, bsize);
  617. state->pos += bsize;
  618. return bsize;
  619. }
  620. size_t state_write(void *p, size_t size, size_t nmemb, void *file)
  621. {
  622. struct savestate_state *state = file;
  623. size_t bsize = size * nmemb;
  624. if (state->pos + bsize > state->size) {
  625. if (log_cb)
  626. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  627. state->pos + bsize, state->size);
  628. bsize = state->size - state->pos;
  629. if ((int)bsize <= 0)
  630. return 0;
  631. }
  632. memcpy(state->save_buf + state->pos, p, bsize);
  633. state->pos += bsize;
  634. return bsize;
  635. }
  636. size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
  637. {
  638. struct savestate_state *state = file;
  639. size_t bsize = size * nmemb;
  640. state->pos += bsize;
  641. return bsize;
  642. }
  643. size_t state_eof(void *file)
  644. {
  645. struct savestate_state *state = file;
  646. return state->pos >= state->size;
  647. }
  648. int state_fseek(void *file, long offset, int whence)
  649. {
  650. struct savestate_state *state = file;
  651. switch (whence) {
  652. case SEEK_SET:
  653. state->pos = offset;
  654. break;
  655. case SEEK_CUR:
  656. state->pos += offset;
  657. break;
  658. case SEEK_END:
  659. state->pos = state->size + offset;
  660. break;
  661. }
  662. return (int)state->pos;
  663. }
  664. /* savestate sizes vary wildly depending if cd/32x or
  665. * carthw is active, so run the whole thing to get size */
  666. size_t retro_serialize_size(void)
  667. {
  668. struct savestate_state state = { 0, };
  669. int ret;
  670. ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
  671. if (ret != 0)
  672. return 0;
  673. return state.pos;
  674. }
  675. bool retro_serialize(void *data, size_t size)
  676. {
  677. struct savestate_state state = { 0, };
  678. int ret;
  679. state.save_buf = data;
  680. state.size = size;
  681. state.pos = 0;
  682. ret = PicoStateFP(&state, 1, NULL, state_write,
  683. NULL, state_fseek);
  684. return ret == 0;
  685. }
  686. bool retro_unserialize(const void *data, size_t size)
  687. {
  688. struct savestate_state state = { 0, };
  689. int ret;
  690. state.load_buf = data;
  691. state.size = size;
  692. state.pos = 0;
  693. ret = PicoStateFP(&state, 0, state_read, NULL,
  694. state_eof, state_fseek);
  695. return ret == 0;
  696. }
  697. typedef struct patch
  698. {
  699. unsigned int addr;
  700. unsigned short data;
  701. unsigned char comp;
  702. } patch;
  703. extern void decode(char *buff, patch *dest);
  704. extern uint16_t m68k_read16(uint32_t a);
  705. extern void m68k_write16(uint32_t a, uint16_t d);
  706. void retro_cheat_reset(void)
  707. {
  708. int i=0;
  709. unsigned int addr;
  710. for (i = 0; i < PicoPatchCount; i++)
  711. {
  712. addr = PicoPatches[i].addr;
  713. if (addr < Pico.romsize) {
  714. if (PicoPatches[i].active)
  715. *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
  716. } else {
  717. if (PicoPatches[i].active)
  718. m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
  719. }
  720. }
  721. PicoPatchUnload();
  722. }
  723. void retro_cheat_set(unsigned index, bool enabled, const char *code)
  724. {
  725. patch pt;
  726. int array_len = PicoPatchCount;
  727. char codeCopy[256];
  728. char *buff;
  729. if (*code == '\0')
  730. return;
  731. strcpy(codeCopy, code);
  732. buff = strtok(codeCopy,"+");
  733. while (buff != NULL)
  734. {
  735. decode(buff, &pt);
  736. if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
  737. {
  738. log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
  739. return;
  740. }
  741. /* code was good, add it */
  742. if (array_len < PicoPatchCount + 1)
  743. {
  744. void *ptr;
  745. array_len *= 2;
  746. array_len++;
  747. ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
  748. if (ptr == NULL) {
  749. log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
  750. return;
  751. }
  752. PicoPatches = ptr;
  753. }
  754. strcpy(PicoPatches[PicoPatchCount].code, buff);
  755. PicoPatches[PicoPatchCount].active = enabled;
  756. PicoPatches[PicoPatchCount].addr = pt.addr;
  757. PicoPatches[PicoPatchCount].data = pt.data;
  758. PicoPatches[PicoPatchCount].comp = pt.comp;
  759. if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
  760. PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
  761. else
  762. PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
  763. PicoPatchCount++;
  764. buff = strtok(NULL,"+");
  765. }
  766. }
  767. /* multidisk support */
  768. static bool disk_ejected;
  769. static unsigned int disk_current_index;
  770. static unsigned int disk_count;
  771. static struct disks_state {
  772. char *fname;
  773. } disks[8];
  774. static bool disk_set_eject_state(bool ejected)
  775. {
  776. // TODO?
  777. disk_ejected = ejected;
  778. return true;
  779. }
  780. static bool disk_get_eject_state(void)
  781. {
  782. return disk_ejected;
  783. }
  784. static unsigned int disk_get_image_index(void)
  785. {
  786. return disk_current_index;
  787. }
  788. static bool disk_set_image_index(unsigned int index)
  789. {
  790. enum cd_img_type cd_type;
  791. int ret;
  792. if (index >= sizeof(disks) / sizeof(disks[0]))
  793. return false;
  794. if (disks[index].fname == NULL) {
  795. if (log_cb)
  796. log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
  797. // RetroArch specifies "no disk" with index == count,
  798. // so don't fail here..
  799. disk_current_index = index;
  800. return true;
  801. }
  802. if (log_cb)
  803. log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
  804. disks[index].fname);
  805. ret = -1;
  806. cd_type = PicoCdCheck(disks[index].fname, NULL);
  807. if (cd_type != CIT_NOT_CD)
  808. ret = cdd_load(disks[index].fname, cd_type);
  809. if (ret != 0) {
  810. if (log_cb)
  811. log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
  812. return 0;
  813. }
  814. disk_current_index = index;
  815. return true;
  816. }
  817. static unsigned int disk_get_num_images(void)
  818. {
  819. return disk_count;
  820. }
  821. static bool disk_replace_image_index(unsigned index,
  822. const struct retro_game_info *info)
  823. {
  824. bool ret = true;
  825. if (index >= sizeof(disks) / sizeof(disks[0]))
  826. return false;
  827. if (disks[index].fname != NULL)
  828. free(disks[index].fname);
  829. disks[index].fname = NULL;
  830. if (info != NULL) {
  831. disks[index].fname = strdup(info->path);
  832. if (index == disk_current_index)
  833. ret = disk_set_image_index(index);
  834. }
  835. return ret;
  836. }
  837. static bool disk_add_image_index(void)
  838. {
  839. if (disk_count >= sizeof(disks) / sizeof(disks[0]))
  840. return false;
  841. disk_count++;
  842. return true;
  843. }
  844. static struct retro_disk_control_callback disk_control = {
  845. disk_set_eject_state,
  846. disk_get_eject_state,
  847. disk_get_image_index,
  848. disk_set_image_index,
  849. disk_get_num_images,
  850. disk_replace_image_index,
  851. disk_add_image_index,
  852. };
  853. static void disk_tray_open(void)
  854. {
  855. if (log_cb)
  856. log_cb(RETRO_LOG_INFO, "cd tray open\n");
  857. disk_ejected = 1;
  858. }
  859. static void disk_tray_close(void)
  860. {
  861. if (log_cb)
  862. log_cb(RETRO_LOG_INFO, "cd tray close\n");
  863. disk_ejected = 0;
  864. }
  865. static const char * const biosfiles_us[] = {
  866. "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
  867. };
  868. static const char * const biosfiles_eu[] = {
  869. "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
  870. };
  871. static const char * const biosfiles_jp[] = {
  872. "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
  873. };
  874. static void make_system_path(char *buf, size_t buf_size,
  875. const char *name, const char *ext)
  876. {
  877. const char *dir = NULL;
  878. if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
  879. snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
  880. }
  881. else {
  882. snprintf(buf, buf_size, "%s%s", name, ext);
  883. }
  884. }
  885. static const char *find_bios(int *region, const char *cd_fname)
  886. {
  887. const char * const *files;
  888. static char path[256];
  889. int i, count;
  890. FILE *f = NULL;
  891. if (*region == 4) { // US
  892. files = biosfiles_us;
  893. count = sizeof(biosfiles_us) / sizeof(char *);
  894. } else if (*region == 8) { // EU
  895. files = biosfiles_eu;
  896. count = sizeof(biosfiles_eu) / sizeof(char *);
  897. } else if (*region == 1 || *region == 2) {
  898. files = biosfiles_jp;
  899. count = sizeof(biosfiles_jp) / sizeof(char *);
  900. } else {
  901. return NULL;
  902. }
  903. for (i = 0; i < count; i++)
  904. {
  905. make_system_path(path, sizeof(path), files[i], ".bin");
  906. f = fopen(path, "rb");
  907. if (f != NULL)
  908. break;
  909. make_system_path(path, sizeof(path), files[i], ".zip");
  910. f = fopen(path, "rb");
  911. if (f != NULL)
  912. break;
  913. }
  914. if (f != NULL) {
  915. if (log_cb)
  916. log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
  917. fclose(f);
  918. return path;
  919. }
  920. return NULL;
  921. }
  922. static void set_memory_maps(void)
  923. {
  924. if (PicoIn.AHW & PAHW_MCD)
  925. {
  926. const size_t SCD_BIT = 1ULL << 31ULL;
  927. const uint64_t mem = RETRO_MEMDESC_SYSTEM_RAM;
  928. struct retro_memory_map mmaps;
  929. struct retro_memory_descriptor descs[] = {
  930. { mem, PicoMem.ram, 0, 0xFF0000, 0, 0, 0x10000, "68KRAM" },
  931. /* virtual address using SCD_BIT so all 512M of prg_ram can be accessed */
  932. /* at address $80020000 */
  933. { mem, Pico_mcd->prg_ram, 0, SCD_BIT | 0x020000, 0, 0, 0x80000, "PRGRAM" },
  934. };
  935. mmaps.descriptors = descs;
  936. mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
  937. environ_cb(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
  938. }
  939. }
  940. bool retro_load_game(const struct retro_game_info *info)
  941. {
  942. enum media_type_e media_type;
  943. static char carthw_path[256];
  944. size_t i;
  945. struct retro_input_descriptor desc[] = {
  946. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  947. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  948. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  949. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  950. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  951. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  952. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  953. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  954. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  955. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  956. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  957. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  958. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  959. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  960. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  961. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  962. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  963. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  964. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  965. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  966. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  967. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  968. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  969. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  970. { 0 },
  971. };
  972. struct retro_input_descriptor desc_sms[] = {
  973. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  974. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  975. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  976. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  977. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  978. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  979. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  980. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  981. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  982. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  983. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  984. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  985. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  986. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  987. { 0 },
  988. };
  989. enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
  990. if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
  991. if (log_cb)
  992. log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
  993. return false;
  994. }
  995. if (info == NULL || info->path == NULL) {
  996. if (log_cb)
  997. log_cb(RETRO_LOG_ERROR, "info->path required\n");
  998. return false;
  999. }
  1000. for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
  1001. if (disks[i].fname != NULL) {
  1002. free(disks[i].fname);
  1003. disks[i].fname = NULL;
  1004. }
  1005. }
  1006. disk_current_index = 0;
  1007. disk_count = 1;
  1008. disks[0].fname = strdup(info->path);
  1009. make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
  1010. media_type = PicoLoadMedia(info->path, carthw_path,
  1011. find_bios, NULL);
  1012. switch (media_type) {
  1013. case PM_BAD_DETECT:
  1014. if (log_cb)
  1015. log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
  1016. return false;
  1017. case PM_BAD_CD:
  1018. if (log_cb)
  1019. log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
  1020. return false;
  1021. case PM_BAD_CD_NO_BIOS:
  1022. if (log_cb)
  1023. log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
  1024. return false;
  1025. case PM_ERROR:
  1026. if (log_cb)
  1027. log_cb(RETRO_LOG_ERROR, "Load error\n");
  1028. return false;
  1029. default:
  1030. break;
  1031. }
  1032. if (media_type == PM_MARK3)
  1033. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
  1034. else
  1035. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
  1036. PicoLoopPrepare();
  1037. PicoIn.writeSound = snd_write;
  1038. memset(sndBuffer, 0, sizeof(sndBuffer));
  1039. PicoIn.sndOut = sndBuffer;
  1040. PsndRerate(0);
  1041. /* Setup retro memory maps */
  1042. set_memory_maps();
  1043. init_frameskip();
  1044. return true;
  1045. }
  1046. bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
  1047. {
  1048. return false;
  1049. }
  1050. void retro_unload_game(void)
  1051. {
  1052. }
  1053. unsigned retro_get_region(void)
  1054. {
  1055. return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
  1056. }
  1057. void *retro_get_memory_data(unsigned type)
  1058. {
  1059. uint8_t* data;
  1060. switch(type)
  1061. {
  1062. case RETRO_MEMORY_SAVE_RAM:
  1063. /* Note: MCD RAM cart uses Pico.sv.data */
  1064. if ((PicoIn.AHW & PAHW_MCD) &&
  1065. !(PicoIn.opt & POPT_EN_MCD_RAMCART))
  1066. data = Pico_mcd->bram;
  1067. else
  1068. data = Pico.sv.data;
  1069. break;
  1070. case RETRO_MEMORY_SYSTEM_RAM:
  1071. if (PicoIn.AHW & PAHW_SMS)
  1072. data = PicoMem.zram;
  1073. else
  1074. data = PicoMem.ram;
  1075. break;
  1076. default:
  1077. data = NULL;
  1078. break;
  1079. }
  1080. return data;
  1081. }
  1082. size_t retro_get_memory_size(unsigned type)
  1083. {
  1084. unsigned int i;
  1085. int sum;
  1086. switch(type)
  1087. {
  1088. case RETRO_MEMORY_SAVE_RAM:
  1089. if (PicoIn.AHW & PAHW_MCD)
  1090. {
  1091. if (PicoIn.opt & POPT_EN_MCD_RAMCART)
  1092. return 0x12000;
  1093. else /* bram */
  1094. return 0x2000;
  1095. }
  1096. if (Pico.m.frame_count == 0)
  1097. return Pico.sv.size;
  1098. // if game doesn't write to sram, don't report it to
  1099. // libretro so that RA doesn't write out zeroed .srm
  1100. for (i = 0, sum = 0; i < Pico.sv.size; i++)
  1101. sum |= Pico.sv.data[i];
  1102. return (sum != 0) ? Pico.sv.size : 0;
  1103. case RETRO_MEMORY_SYSTEM_RAM:
  1104. if (PicoIn.AHW & PAHW_SMS)
  1105. return 0x2000;
  1106. else
  1107. return sizeof(PicoMem.ram);
  1108. default:
  1109. return 0;
  1110. }
  1111. }
  1112. void retro_reset(void)
  1113. {
  1114. PicoReset();
  1115. }
  1116. static const unsigned short retro_pico_map[] = {
  1117. 1 << GBTN_B,
  1118. 1 << GBTN_A,
  1119. 1 << GBTN_MODE,
  1120. 1 << GBTN_START,
  1121. 1 << GBTN_UP,
  1122. 1 << GBTN_DOWN,
  1123. 1 << GBTN_LEFT,
  1124. 1 << GBTN_RIGHT,
  1125. 1 << GBTN_C,
  1126. 1 << GBTN_Y,
  1127. 1 << GBTN_X,
  1128. 1 << GBTN_Z,
  1129. };
  1130. #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
  1131. static void snd_write(int len)
  1132. {
  1133. audio_batch_cb(PicoIn.sndOut, len / 4);
  1134. }
  1135. static enum input_device input_name_to_val(const char *name)
  1136. {
  1137. if (strcmp(name, "3 button pad") == 0)
  1138. return PICO_INPUT_PAD_3BTN;
  1139. if (strcmp(name, "6 button pad") == 0)
  1140. return PICO_INPUT_PAD_6BTN;
  1141. if (strcmp(name, "None") == 0)
  1142. return PICO_INPUT_NOTHING;
  1143. if (log_cb)
  1144. log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
  1145. return PICO_INPUT_PAD_3BTN;
  1146. }
  1147. static void update_variables(bool first_run)
  1148. {
  1149. struct retro_variable var;
  1150. int OldPicoRegionOverride;
  1151. float old_user_vout_width;
  1152. unsigned old_frameskip_type;
  1153. double new_sound_rate;
  1154. var.value = NULL;
  1155. var.key = "picodrive_input1";
  1156. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1157. PicoSetInputDevice(0, input_name_to_val(var.value));
  1158. var.value = NULL;
  1159. var.key = "picodrive_input2";
  1160. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1161. PicoSetInputDevice(1, input_name_to_val(var.value));
  1162. var.value = NULL;
  1163. var.key = "picodrive_sprlim";
  1164. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1165. if (strcmp(var.value, "enabled") == 0)
  1166. PicoIn.opt |= POPT_DIS_SPRITE_LIM;
  1167. else
  1168. PicoIn.opt &= ~POPT_DIS_SPRITE_LIM;
  1169. }
  1170. var.value = NULL;
  1171. var.key = "picodrive_ramcart";
  1172. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1173. if (strcmp(var.value, "enabled") == 0)
  1174. PicoIn.opt |= POPT_EN_MCD_RAMCART;
  1175. else
  1176. PicoIn.opt &= ~POPT_EN_MCD_RAMCART;
  1177. }
  1178. OldPicoRegionOverride = PicoIn.regionOverride;
  1179. var.value = NULL;
  1180. var.key = "picodrive_region";
  1181. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1182. if (strcmp(var.value, "Auto") == 0)
  1183. PicoIn.regionOverride = 0;
  1184. else if (strcmp(var.value, "Japan NTSC") == 0)
  1185. PicoIn.regionOverride = 1;
  1186. else if (strcmp(var.value, "Japan PAL") == 0)
  1187. PicoIn.regionOverride = 2;
  1188. else if (strcmp(var.value, "US") == 0)
  1189. PicoIn.regionOverride = 4;
  1190. else if (strcmp(var.value, "Europe") == 0)
  1191. PicoIn.regionOverride = 8;
  1192. }
  1193. // Update region, fps and sound flags if needed
  1194. if (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)
  1195. {
  1196. PicoDetectRegion();
  1197. PicoLoopPrepare();
  1198. PsndRerate(1);
  1199. }
  1200. old_user_vout_width = user_vout_width;
  1201. var.value = NULL;
  1202. var.key = "picodrive_aspect";
  1203. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1204. if (strcmp(var.value, "4/3") == 0)
  1205. user_vout_width = VOUT_4_3;
  1206. else if (strcmp(var.value, "CRT") == 0)
  1207. user_vout_width = VOUT_CRT;
  1208. else
  1209. user_vout_width = VOUT_PAR;
  1210. }
  1211. if (user_vout_width != old_user_vout_width)
  1212. {
  1213. // Update the geometry
  1214. struct retro_system_av_info av_info;
  1215. retro_get_system_av_info(&av_info);
  1216. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  1217. }
  1218. old_show_overscan = show_overscan;
  1219. var.value = NULL;
  1220. var.key = "picodrive_overscan";
  1221. show_overscan = false;
  1222. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1223. if (strcmp(var.value, "enabled") == 0)
  1224. show_overscan = true;
  1225. }
  1226. if (show_overscan != old_show_overscan)
  1227. {
  1228. if ((vm_current_start_line != -1) &&
  1229. (vm_current_line_count != -1) &&
  1230. (vm_current_is_32cols != -1))
  1231. emu_video_mode_change(
  1232. vm_current_start_line,
  1233. vm_current_line_count,
  1234. vm_current_is_32cols);
  1235. }
  1236. var.value = NULL;
  1237. var.key = "picodrive_overclk68k";
  1238. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1239. PicoIn.overclockM68k = 0;
  1240. if (var.value[0] == '+')
  1241. PicoIn.overclockM68k = atoi(var.value + 1);
  1242. }
  1243. #ifdef DRC_SH2
  1244. var.value = NULL;
  1245. var.key = "picodrive_drc";
  1246. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1247. if (strcmp(var.value, "enabled") == 0)
  1248. PicoIn.opt |= POPT_EN_DRC;
  1249. else
  1250. PicoIn.opt &= ~POPT_EN_DRC;
  1251. }
  1252. #endif
  1253. #ifdef _3DS
  1254. if(!ctr_svchack_successful)
  1255. PicoIn.opt &= ~POPT_EN_DRC;
  1256. #endif
  1257. var.value = NULL;
  1258. var.key = "picodrive_audio_filter";
  1259. PicoIn.sndFilter = 0;
  1260. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1261. if (strcmp(var.value, "low-pass") == 0)
  1262. PicoIn.sndFilter = 1;
  1263. }
  1264. var.value = NULL;
  1265. var.key = "picodrive_lowpass_range";
  1266. PicoIn.sndFilterRange = (60 * 65536) / 100;
  1267. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1268. PicoIn.sndFilterRange = (atoi(var.value) * 65536) / 100;
  1269. }
  1270. old_frameskip_type = frameskip_type;
  1271. frameskip_type = 0;
  1272. var.key = "picodrive_frameskip";
  1273. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1274. if (strcmp(var.value, "auto") == 0)
  1275. frameskip_type = 1;
  1276. else if (strcmp(var.value, "manual") == 0)
  1277. frameskip_type = 2;
  1278. }
  1279. frameskip_threshold = 33;
  1280. var.key = "picodrive_frameskip_threshold";
  1281. var.value = NULL;
  1282. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1283. frameskip_threshold = strtol(var.value, NULL, 10);
  1284. var.value = NULL;
  1285. var.key = "picodrive_renderer";
  1286. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1287. if (strcmp(var.value, "fast") == 0)
  1288. PicoIn.opt |= POPT_ALT_RENDERER;
  1289. else
  1290. PicoIn.opt &= ~POPT_ALT_RENDERER;
  1291. }
  1292. var.value = NULL;
  1293. var.key = "picodrive_sound_rate";
  1294. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1295. new_sound_rate = atoi(var.value);
  1296. if (new_sound_rate != PicoIn.sndRate) {
  1297. /* Update the sound rate */
  1298. PicoIn.sndRate = new_sound_rate;
  1299. PsndRerate(1);
  1300. struct retro_system_av_info av_info;
  1301. retro_get_system_av_info(&av_info);
  1302. environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &av_info);
  1303. }
  1304. }
  1305. /* Reinitialise frameskipping, if required */
  1306. if (((frameskip_type != old_frameskip_type) ||
  1307. (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)) &&
  1308. !first_run)
  1309. init_frameskip();
  1310. }
  1311. void retro_run(void)
  1312. {
  1313. bool updated = false;
  1314. int pad, i;
  1315. static void *buff;
  1316. PicoIn.skipFrame = 0;
  1317. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
  1318. update_variables(false);
  1319. input_poll_cb();
  1320. PicoIn.pad[0] = PicoIn.pad[1] = 0;
  1321. for (pad = 0; pad < 2; pad++)
  1322. for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
  1323. if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
  1324. PicoIn.pad[pad] |= retro_pico_map[i];
  1325. if (PicoPatches)
  1326. PicoPatchApply();
  1327. /* Check whether current frame should
  1328. * be skipped */
  1329. if ((frameskip_type > 0) && retro_audio_buff_active) {
  1330. switch (frameskip_type)
  1331. {
  1332. case 1: /* auto */
  1333. PicoIn.skipFrame = retro_audio_buff_underrun ? 1 : 0;
  1334. break;
  1335. case 2: /* manual */
  1336. PicoIn.skipFrame = (retro_audio_buff_occupancy < frameskip_threshold) ? 1 : 0;
  1337. break;
  1338. default:
  1339. PicoIn.skipFrame = 0;
  1340. break;
  1341. }
  1342. if (!PicoIn.skipFrame || (frameskip_counter >= FRAMESKIP_MAX)) {
  1343. PicoIn.skipFrame = 0;
  1344. frameskip_counter = 0;
  1345. } else
  1346. frameskip_counter++;
  1347. }
  1348. /* If frameskip settings have changed, update
  1349. * frontend audio latency */
  1350. if (update_audio_latency) {
  1351. environ_cb(RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY,
  1352. &audio_latency);
  1353. update_audio_latency = false;
  1354. }
  1355. PicoFrame();
  1356. /* If frame was skipped, call video_cb() with
  1357. * a NULL buffer and return immediately */
  1358. if (PicoIn.skipFrame) {
  1359. video_cb(NULL, vout_width, vout_height, vout_width * 2);
  1360. return;
  1361. }
  1362. #if defined(RENDER_GSKIT_PS2)
  1363. buff = (uint32_t *)RETRO_HW_FRAME_BUFFER_VALID;
  1364. if (!ps2) {
  1365. if (!environ_cb(RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE, (void **)&ps2) || !ps2) {
  1366. printf("Failed to get HW rendering interface!\n");
  1367. return;
  1368. }
  1369. if (ps2->interface_version != RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION) {
  1370. printf("HW render interface mismatch, expected %u, got %u!\n",
  1371. RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION, ps2->interface_version);
  1372. return;
  1373. }
  1374. ps2->coreTexture->Width = vout_width;
  1375. ps2->coreTexture->Height = vout_height;
  1376. ps2->coreTexture->PSM = GS_PSM_T8;
  1377. ps2->coreTexture->ClutPSM = GS_PSM_CT16;
  1378. ps2->coreTexture->Filter = GS_FILTER_LINEAR;
  1379. ps2->coreTexture->Clut = retro_palette;
  1380. }
  1381. if (Pico.m.dirtyPal) {
  1382. int i;
  1383. unsigned short int *pal=(void *)ps2->coreTexture->Clut;
  1384. if (PicoIn.AHW & PAHW_SMS) {
  1385. // SMS
  1386. unsigned int *spal=(void *)PicoMem.cram;
  1387. unsigned int *dpal=(void *)pal;
  1388. unsigned int t;
  1389. /* cram is always stored as shorts, even though real hardware probably uses bytes */
  1390. for (i = 0x20/2; i > 0; i--, spal++, dpal++) {
  1391. t = *spal;
  1392. t = ((t & 0x00030003)<< 3) | ((t & 0x000c000c)<<6) | ((t & 0x00300030)<<9);
  1393. t |= t >> 2;
  1394. t |= (t >> 4) & 0x08610861;
  1395. *dpal = t;
  1396. }
  1397. pal[0xe0] = 0;
  1398. } else if (PicoIn.AHW & PAHW_32X) {
  1399. // MCD+32X
  1400. } else if (PicoIn.AHW & PAHW_MCD) {
  1401. // MCD
  1402. } else {
  1403. // MD
  1404. if(Pico.video.reg[0xC]&8){
  1405. do_pal_convert_with_shadows(pal, PicoMem.cram);
  1406. } else {
  1407. do_pal_convert(pal, PicoMem.cram);
  1408. if (Pico.est.rendstatus & PDRAW_SONIC_MODE) {
  1409. memcpy(&pal[0x80], pal, 0x40*2);
  1410. }
  1411. }
  1412. }
  1413. //Rotate CLUT.
  1414. for (i = 0; i < 256; i++) {
  1415. if ((i&0x18) == 8) {
  1416. unsigned short int tmp = pal[i];
  1417. pal[i] = pal[i+8];
  1418. pal[i+8] = tmp;
  1419. }
  1420. }
  1421. Pico.m.dirtyPal = 0;
  1422. }
  1423. if (PicoIn.AHW & PAHW_SMS) {
  1424. ps2->coreTexture->Mem = vout_buf;
  1425. } else {
  1426. ps2->coreTexture->Mem = Pico.est.Draw2FB;
  1427. }
  1428. ps2->padding = padding;
  1429. #else
  1430. if (PicoIn.opt & POPT_ALT_RENDERER) {
  1431. /* In retro_init, PicoDrawSetOutBuf is called to make sure the output gets written to vout_buf, but this only
  1432. * applies to the line renderer (pico/draw.c). The faster tile-based renderer (pico/draw2.c) enabled by
  1433. * POPT_ALT_RENDERER writes to Pico.est.Draw2FB, so we need to manually copy that to vout_buf.
  1434. */
  1435. /* This section is mostly copied from pemu_finalize_frame in platform/linux/emu.c */
  1436. unsigned short *pd = (unsigned short *)vout_buf;
  1437. /* Skip the leftmost 8 columns (it seems to be used as some sort of caching or overscan area) */
  1438. unsigned char *ps = Pico.est.Draw2FB + 8;
  1439. unsigned short *pal = Pico.est.HighPal;
  1440. int x;
  1441. if (Pico.m.dirtyPal)
  1442. PicoDrawUpdateHighPal();
  1443. /* Copy up to the max height to include the overscan area, and skip the leftmost 8 columns again */
  1444. for (i = 0; i < VOUT_MAX_HEIGHT; i++, ps += 8)
  1445. for (x = 0; x < vout_width; x++)
  1446. *pd++ = pal[*ps++];
  1447. }
  1448. buff = (char*)vout_buf + vout_offset;
  1449. #endif
  1450. video_cb((short *)buff,
  1451. vout_width, vout_height, vout_width * 2);
  1452. }
  1453. void retro_init(void)
  1454. {
  1455. struct retro_log_callback log;
  1456. int level;
  1457. level = 0;
  1458. environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
  1459. if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
  1460. log_cb = log.log;
  1461. else
  1462. log_cb = NULL;
  1463. environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
  1464. #ifdef _3DS
  1465. ctr_svchack_successful = ctr_svchack_init();
  1466. check_rosalina();
  1467. #elif defined(VITA)
  1468. sceBlock = getVMBlock();
  1469. #endif
  1470. PicoIn.opt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80|POPT_EN_YM2413
  1471. | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
  1472. | POPT_EN_32X|POPT_EN_PWM
  1473. | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
  1474. #ifdef __arm__
  1475. #ifdef _3DS
  1476. if (ctr_svchack_successful)
  1477. #endif
  1478. PicoIn.opt |= POPT_EN_DRC;
  1479. #endif
  1480. struct retro_variable var = { .key = "picodrive_sound_rate" };
  1481. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1482. PicoIn.sndRate = atoi(var.value);
  1483. else
  1484. PicoIn.sndRate = INITIAL_SND_RATE;
  1485. PicoIn.autoRgnOrder = 0x184; // US, EU, JP
  1486. vout_width = VOUT_MAX_WIDTH;
  1487. vout_height = VOUT_MAX_HEIGHT;
  1488. #ifdef _3DS
  1489. vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
  1490. #elif defined(RENDER_GSKIT_PS2)
  1491. vout_buf = memalign(128, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT);
  1492. retro_palette = memalign(128, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
  1493. #else
  1494. vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  1495. #endif
  1496. PicoInit();
  1497. #if defined(RENDER_GSKIT_PS2)
  1498. PicoDrawSetOutFormat(PDF_NONE, 0);
  1499. PicoDrawSetOutBuf(vout_buf, vout_width);
  1500. PicoDrawSetOutputMode4(PDF_8BIT);
  1501. #else
  1502. PicoDrawSetOutFormat(PDF_RGB555, 0);
  1503. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  1504. #endif
  1505. //PicoIn.osdMessage = plat_status_msg_busy_next;
  1506. PicoIn.mcdTrayOpen = disk_tray_open;
  1507. PicoIn.mcdTrayClose = disk_tray_close;
  1508. frameskip_type = 0;
  1509. frameskip_threshold = 0;
  1510. frameskip_counter = 0;
  1511. retro_audio_buff_active = false;
  1512. retro_audio_buff_occupancy = 0;
  1513. retro_audio_buff_underrun = false;
  1514. audio_latency = 0;
  1515. update_audio_latency = false;
  1516. update_variables(true);
  1517. }
  1518. void retro_deinit(void)
  1519. {
  1520. #ifdef _3DS
  1521. linearFree(vout_buf);
  1522. #elif defined(RENDER_GSKIT_PS2)
  1523. free(vout_buf);
  1524. free(retro_palette);
  1525. ps2 = NULL;
  1526. #else
  1527. free(vout_buf);
  1528. #endif
  1529. vout_buf = NULL;
  1530. PicoExit();
  1531. }