libretro.c 50 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. * (C) kub, 2020
  7. *
  8. * This work is licensed under the terms of MAME license.
  9. * See COPYING file in the top-level directory.
  10. */
  11. #define _GNU_SOURCE 1 // mremap
  12. #include <stdio.h>
  13. #include <stdlib.h>
  14. #include <stdarg.h>
  15. #include <string.h>
  16. #ifndef _WIN32
  17. #ifndef NO_MMAP
  18. #ifdef __SWITCH__
  19. #include "../switch/mman.h"
  20. #else
  21. #include <sys/mman.h>
  22. #endif
  23. #endif
  24. #else
  25. #include <io.h>
  26. #include <windows.h>
  27. #include <sys/types.h>
  28. #endif
  29. #include <errno.h>
  30. #ifdef __MACH__
  31. #include <libkern/OSCacheControl.h>
  32. #endif
  33. #ifdef USE_LIBRETRO_VFS
  34. #include "file_stream_transforms.h"
  35. #endif
  36. #if defined(RENDER_GSKIT_PS2)
  37. #include "libretro-common/include/libretro_gskit_ps2.h"
  38. #include "../ps2/asm.h"
  39. #endif
  40. #ifdef _3DS
  41. #include "3ds/3ds_utils.h"
  42. #define MEMOP_MAP 4
  43. #define MEMOP_UNMAP 5
  44. #define MEMOP_PROT 6
  45. int svcDuplicateHandle(unsigned int* out, unsigned int original);
  46. int svcCloseHandle(unsigned int handle);
  47. int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
  48. unsigned int size, unsigned int type, unsigned int perm);
  49. void* linearMemAlign(size_t size, size_t alignment);
  50. void linearFree(void* mem);
  51. static int ctr_svchack_successful = 0;
  52. #elif defined(VITA)
  53. #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
  54. #include <psp2/kernel/sysmem.h>
  55. static int sceBlock;
  56. int getVMBlock();
  57. int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
  58. #endif
  59. #include "libretro_core_options.h"
  60. #include <pico/pico_int.h>
  61. #include <pico/state.h>
  62. #include <pico/patch.h>
  63. #include "../common/input_pico.h"
  64. #include "../common/version.h"
  65. #include <libretro.h>
  66. static retro_log_printf_t log_cb;
  67. static retro_video_refresh_t video_cb;
  68. static retro_input_poll_t input_poll_cb;
  69. static retro_input_state_t input_state_cb;
  70. static retro_environment_t environ_cb;
  71. static retro_audio_sample_batch_t audio_batch_cb;
  72. #define VOUT_MAX_WIDTH 320
  73. #define VOUT_32COL_WIDTH 256
  74. #define VOUT_MAX_HEIGHT 240
  75. #define INITIAL_SND_RATE 44100
  76. static const float VOUT_PAR = 0.0;
  77. static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
  78. static const float VOUT_CRT = (224.0f * 1.29911f);
  79. static bool show_overscan = false;
  80. static bool old_show_overscan = false;
  81. /* Required to allow on the fly changes to 'show overscan' */
  82. static int vm_current_start_line = -1;
  83. static int vm_current_line_count = -1;
  84. static int vm_current_is_32cols = -1;
  85. static int vout_16bit = 1;
  86. static int vout_format = PDF_RGB555;
  87. static void *vout_buf;
  88. static int vout_width, vout_height, vout_offset;
  89. static float user_vout_width = 0.0;
  90. #if defined(RENDER_GSKIT_PS2)
  91. #define VOUT_8BIT_WIDTH 328
  92. #define VOUT_8BIT_HEIGHT 256
  93. RETRO_HW_RENDER_INTEFACE_GSKIT_PS2 *ps2 = NULL;
  94. static void *retro_palette;
  95. static struct retro_hw_ps2_insets padding;
  96. #endif
  97. static short ALIGNED(4) sndBuffer[2*INITIAL_SND_RATE/50];
  98. static void snd_write(int len);
  99. char **g_argv;
  100. #ifdef _WIN32
  101. #define SLASH '\\'
  102. #else
  103. #define SLASH '/'
  104. #endif
  105. /* Frameskipping Support */
  106. static unsigned frameskip_type = 0;
  107. static unsigned frameskip_threshold = 0;
  108. static uint16_t frameskip_counter = 0;
  109. static bool retro_audio_buff_active = false;
  110. static unsigned retro_audio_buff_occupancy = 0;
  111. static bool retro_audio_buff_underrun = false;
  112. /* Maximum number of consecutive frames that
  113. * can be skipped */
  114. #define FRAMESKIP_MAX 60
  115. static unsigned audio_latency = 0;
  116. static bool update_audio_latency = false;
  117. static void retro_audio_buff_status_cb(
  118. bool active, unsigned occupancy, bool underrun_likely)
  119. {
  120. retro_audio_buff_active = active;
  121. retro_audio_buff_occupancy = occupancy;
  122. retro_audio_buff_underrun = underrun_likely;
  123. }
  124. static void init_frameskip(void)
  125. {
  126. if (frameskip_type > 0)
  127. {
  128. struct retro_audio_buffer_status_callback buf_status_cb;
  129. buf_status_cb.callback = retro_audio_buff_status_cb;
  130. if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK,
  131. &buf_status_cb))
  132. {
  133. if (log_cb)
  134. log_cb(RETRO_LOG_WARN, "Frameskip disabled - frontend does not support audio buffer status monitoring.\n");
  135. retro_audio_buff_active = false;
  136. retro_audio_buff_occupancy = 0;
  137. retro_audio_buff_underrun = false;
  138. audio_latency = 0;
  139. }
  140. else
  141. {
  142. /* Frameskip is enabled - increase frontend
  143. * audio latency to minimise potential
  144. * buffer underruns */
  145. float frame_time_msec = 1000.0f / (Pico.m.pal ? 50.0f : 60.0f);
  146. /* Set latency to 6x current frame time... */
  147. audio_latency = (unsigned)((6.0f * frame_time_msec) + 0.5f);
  148. /* ...then round up to nearest multiple of 32 */
  149. audio_latency = (audio_latency + 0x1F) & ~0x1F;
  150. }
  151. }
  152. else
  153. {
  154. environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL);
  155. audio_latency = 0;
  156. }
  157. update_audio_latency = true;
  158. }
  159. /* functions called by the core */
  160. void cache_flush_d_inval_i(void *start, void *end)
  161. {
  162. #ifdef __arm__
  163. size_t len = (char *)end - (char *)start;
  164. (void)len;
  165. #if defined(__BLACKBERRY_QNX__)
  166. msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
  167. #elif defined(__MACH__)
  168. sys_dcache_flush(start, len);
  169. sys_icache_invalidate(start, len);
  170. #elif defined(_3DS)
  171. ctr_flush_invalidate_cache();
  172. #elif defined(VITA)
  173. sceKernelSyncVMDomain(sceBlock, start, len);
  174. #else
  175. __clear_cache(start, end);
  176. #endif
  177. #endif
  178. }
  179. #ifdef RENDER_GSKIT_PS2
  180. /* ee-gcc is version 3.2, where these aren't yet defined */
  181. void __builtin___clear_cache(void *b, void *e)
  182. {
  183. #if 0 /* which of these is overall faster for lots of small cache updates? */
  184. SyncDCache(b, e);
  185. #else
  186. FlushCache(0); /* WRITEBACK_DCACHE */
  187. #endif
  188. FlushCache(2); /* INVALIDATE_ICACHE */
  189. }
  190. int __builtin_parity(unsigned v)
  191. {
  192. /* credits to bit twiddling hacks, https://graphics.stanford.edu/~seander/bithacks.html */
  193. v ^= v >> 16;
  194. v ^= v >> 8;
  195. v ^= v >> 4;
  196. return (0x6996 >> (v&0xf)) & 1;
  197. }
  198. #endif
  199. #ifdef __MACH__
  200. /* calls to this may be generated by the compiler, but it's missing in libc? */
  201. void __clear_cache(void *start, void *end)
  202. {
  203. size_t len = (char *)end - (char *)start;
  204. sys_dcache_flush(start, len);
  205. sys_icache_invalidate(start, len);
  206. }
  207. #endif
  208. #ifdef _WIN32
  209. /* mmap() replacement for Windows
  210. *
  211. * Author: Mike Frysinger <vapier@gentoo.org>
  212. * Placed into the public domain
  213. */
  214. /* References:
  215. * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
  216. * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
  217. * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
  218. * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
  219. */
  220. #define PROT_READ 0x1
  221. #define PROT_WRITE 0x2
  222. /* This flag is only available in WinXP+ */
  223. #ifdef FILE_MAP_EXECUTE
  224. #define PROT_EXEC 0x4
  225. #else
  226. #define PROT_EXEC 0x0
  227. #define FILE_MAP_EXECUTE 0
  228. #endif
  229. #define MAP_SHARED 0x01
  230. #define MAP_PRIVATE 0x02
  231. #define MAP_ANONYMOUS 0x20
  232. #define MAP_ANON MAP_ANONYMOUS
  233. #define MAP_FAILED ((void *) -1)
  234. #ifdef __USE_FILE_OFFSET64
  235. # define DWORD_HI(x) (x >> 32)
  236. # define DWORD_LO(x) ((x) & 0xffffffff)
  237. #else
  238. # define DWORD_HI(x) (0)
  239. # define DWORD_LO(x) (x)
  240. #endif
  241. static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
  242. {
  243. uint32_t flProtect, dwDesiredAccess;
  244. off_t end;
  245. HANDLE mmap_fd, h;
  246. void *ret;
  247. if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
  248. return MAP_FAILED;
  249. if (fd == -1) {
  250. if (!(flags & MAP_ANON) || offset)
  251. return MAP_FAILED;
  252. } else if (flags & MAP_ANON)
  253. return MAP_FAILED;
  254. if (prot & PROT_WRITE) {
  255. if (prot & PROT_EXEC)
  256. flProtect = PAGE_EXECUTE_READWRITE;
  257. else
  258. flProtect = PAGE_READWRITE;
  259. } else if (prot & PROT_EXEC) {
  260. if (prot & PROT_READ)
  261. flProtect = PAGE_EXECUTE_READ;
  262. else if (prot & PROT_EXEC)
  263. flProtect = PAGE_EXECUTE;
  264. } else
  265. flProtect = PAGE_READONLY;
  266. end = length + offset;
  267. if (fd == -1)
  268. mmap_fd = INVALID_HANDLE_VALUE;
  269. else
  270. mmap_fd = (HANDLE)_get_osfhandle(fd);
  271. h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
  272. if (h == NULL)
  273. return MAP_FAILED;
  274. if (prot & PROT_WRITE)
  275. dwDesiredAccess = FILE_MAP_WRITE;
  276. else
  277. dwDesiredAccess = FILE_MAP_READ;
  278. if (prot & PROT_EXEC)
  279. dwDesiredAccess |= FILE_MAP_EXECUTE;
  280. if (flags & MAP_PRIVATE)
  281. dwDesiredAccess |= FILE_MAP_COPY;
  282. ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
  283. if (ret == NULL) {
  284. CloseHandle(h);
  285. ret = MAP_FAILED;
  286. }
  287. return ret;
  288. }
  289. static void munmap(void *addr, size_t length)
  290. {
  291. UnmapViewOfFile(addr);
  292. /* ruh-ro, we leaked handle from CreateFileMapping() ... */
  293. }
  294. #elif defined(NO_MMAP)
  295. #define PROT_EXEC 0x04
  296. #define MAP_FAILED 0
  297. #define PROT_READ 0
  298. #define PROT_WRITE 0
  299. #define MAP_PRIVATE 0
  300. #define MAP_ANONYMOUS 0
  301. void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
  302. {
  303. return malloc(len);
  304. }
  305. void munmap(void *base_addr, size_t len)
  306. {
  307. free(base_addr);
  308. }
  309. int mprotect(void *addr, size_t len, int prot)
  310. {
  311. /* stub - not really needed at this point since this codepath has no dynarecs */
  312. return 0;
  313. }
  314. #endif
  315. #ifndef MAP_ANONYMOUS
  316. #define MAP_ANONYMOUS MAP_ANON
  317. #endif
  318. #ifdef _3DS
  319. typedef struct
  320. {
  321. unsigned int requested_map;
  322. void* buffer;
  323. }pico_mmap_t;
  324. pico_mmap_t pico_mmaps[] = {
  325. {0x02000000, 0},
  326. {0x06000000, 0},
  327. {NULL, 0}
  328. };
  329. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  330. {
  331. (void)is_fixed;
  332. if (ctr_svchack_successful)
  333. {
  334. pico_mmap_t* pico_mmap;
  335. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  336. {
  337. if ((pico_mmap->requested_map == addr))
  338. {
  339. unsigned int ptr_aligned, tmp;
  340. unsigned int currentHandle;
  341. unsigned int perm = 0b011;
  342. if (need_exec)
  343. perm = 0b111;
  344. size = (size + 0xFFF) & ~0xFFF;
  345. pico_mmap->buffer = malloc(size + 0x1000);
  346. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  347. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  348. if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
  349. {
  350. if (log_cb)
  351. log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
  352. exit(1);
  353. }
  354. svcCloseHandle(currentHandle);
  355. return (void*)pico_mmap->requested_map;
  356. }
  357. }
  358. }
  359. return malloc(size);
  360. }
  361. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  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. void* tmp;
  373. oldsize = (oldsize + 0xFFF) & ~0xFFF;
  374. newsize = (newsize + 0xFFF) & ~0xFFF;
  375. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  376. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  377. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
  378. tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
  379. if(!tmp)
  380. return NULL;
  381. pico_mmap->buffer = tmp;
  382. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  383. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
  384. svcCloseHandle(currentHandle);
  385. return ptr;
  386. }
  387. }
  388. }
  389. return realloc(ptr, newsize);
  390. }
  391. void plat_munmap(void *ptr, size_t size)
  392. {
  393. if (ctr_svchack_successful)
  394. {
  395. pico_mmap_t* pico_mmap;
  396. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  397. {
  398. if ((pico_mmap->requested_map == (unsigned int)ptr))
  399. {
  400. unsigned int ptr_aligned;
  401. unsigned int currentHandle;
  402. size = (size + 0xFFF) & ~0xFFF;
  403. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  404. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  405. svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
  406. svcCloseHandle(currentHandle);
  407. free(pico_mmap->buffer);
  408. pico_mmap->buffer = NULL;
  409. return;
  410. }
  411. }
  412. }
  413. free(ptr);
  414. }
  415. #else
  416. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  417. {
  418. int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  419. void *req, *ret;
  420. req = (void *)(uintptr_t)addr;
  421. ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  422. if (ret == MAP_FAILED) {
  423. if (log_cb)
  424. log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
  425. return NULL;
  426. }
  427. if (addr != 0 && ret != (void *)(uintptr_t)addr) {
  428. if (log_cb)
  429. log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
  430. addr, ret);
  431. if (is_fixed) {
  432. munmap(ret, size);
  433. return NULL;
  434. }
  435. }
  436. return ret;
  437. }
  438. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  439. {
  440. #if defined(__linux__) && !defined(__SWITCH__)
  441. void *ret = mremap(ptr, oldsize, newsize, 0);
  442. if (ret == MAP_FAILED)
  443. return NULL;
  444. return ret;
  445. #else
  446. void *tmp, *ret;
  447. size_t preserve_size;
  448. preserve_size = oldsize;
  449. if (preserve_size > newsize)
  450. preserve_size = newsize;
  451. tmp = malloc(preserve_size);
  452. if (tmp == NULL)
  453. return NULL;
  454. memcpy(tmp, ptr, preserve_size);
  455. munmap(ptr, oldsize);
  456. ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
  457. MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  458. if (ret == MAP_FAILED) {
  459. free(tmp);
  460. return NULL;
  461. }
  462. memcpy(ret, tmp, preserve_size);
  463. free(tmp);
  464. return ret;
  465. #endif
  466. }
  467. void plat_munmap(void *ptr, size_t size)
  468. {
  469. if (ptr != NULL)
  470. munmap(ptr, size);
  471. }
  472. #endif
  473. // if NULL is returned, static buffer is used
  474. void *plat_mem_get_for_drc(size_t size)
  475. {
  476. void *mem = NULL;
  477. #ifdef VITA
  478. sceKernelGetMemBlockBase(sceBlock, &mem);
  479. #endif
  480. return mem;
  481. }
  482. int plat_mem_set_exec(void *ptr, size_t size)
  483. {
  484. int ret = -1;
  485. #ifdef _WIN32
  486. DWORD oldProtect = 0;
  487. ret = VirtualProtect(ptr, size, PAGE_EXECUTE_READWRITE, &oldProtect);
  488. if (ret == 0 && log_cb)
  489. log_cb(RETRO_LOG_ERROR, "VirtualProtect(%p, %d) failed: %d\n", ptr, (int)size,
  490. GetLastError());
  491. #elif defined(_3DS)
  492. if (ctr_svchack_successful)
  493. {
  494. unsigned int currentHandle;
  495. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  496. ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
  497. size, MEMOP_PROT, 0b111);
  498. svcCloseHandle(currentHandle);
  499. ctr_flush_invalidate_cache();
  500. }
  501. else
  502. {
  503. if (log_cb)
  504. log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
  505. exit(1);
  506. }
  507. #elif defined(VITA)
  508. ret = sceKernelOpenVMDomain();
  509. #else
  510. ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
  511. if (ret != 0 && log_cb)
  512. log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
  513. #endif
  514. return ret;
  515. }
  516. void emu_video_mode_change(int start_line, int line_count, int is_32cols)
  517. {
  518. struct retro_system_av_info av_info;
  519. vm_current_start_line = start_line;
  520. vm_current_line_count = line_count;
  521. vm_current_is_32cols = is_32cols;
  522. // 8bit renderes create a 328x256 CLUT image, while 16bit creates 320x240 RGB
  523. vout_16bit = vout_format == PDF_RGB555 || (PicoIn.AHW & PAHW_32X);
  524. #if defined(RENDER_GSKIT_PS2)
  525. // calculate the borders of the real image inside the picodrive image
  526. vout_width = (vout_16bit ? VOUT_MAX_WIDTH : VOUT_8BIT_WIDTH);
  527. vout_height = (vout_16bit ? VOUT_MAX_HEIGHT : VOUT_8BIT_HEIGHT);
  528. vout_offset = (vout_16bit ? 0 : 8); // 8bit has 8 px overlap area on the left
  529. if (is_32cols) {
  530. // 256x240, with or w/o overlap on the left and 64 px on the right
  531. padding = (struct retro_hw_ps2_insets){start_line, vout_offset, vout_height - line_count - start_line, vout_width - 256.0f - vout_offset};
  532. } else {
  533. // 320x240, with or w/o overlap on the left and none on the right
  534. padding = (struct retro_hw_ps2_insets){start_line, vout_offset, vout_height - line_count - start_line, vout_width - 320.0f - vout_offset};
  535. }
  536. int pxsz = (vout_16bit ? 2 : 1); // pixel size: RGB = 16 bits, CLUT = 8 bits
  537. memset(vout_buf, 0, pxsz * vout_width * vout_height);
  538. memset(retro_palette, 0, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
  539. PicoDrawSetOutBuf(vout_buf, pxsz * vout_width);
  540. if (ps2) {
  541. // prepare image as texture for rendering
  542. ps2->coreTexture->Width = vout_width;
  543. ps2->coreTexture->Height = vout_height;
  544. ps2->coreTexture->PSM = (vout_16bit ? GS_PSM_CT16 : GS_PSM_T8);
  545. ps2->padding = padding;
  546. }
  547. #else
  548. vout_width = is_32cols ? VOUT_32COL_WIDTH : VOUT_MAX_WIDTH;
  549. memset(vout_buf, 0, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  550. if (vout_16bit)
  551. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  552. if (show_overscan)
  553. {
  554. vout_height = line_count + (start_line * 2);
  555. vout_offset = 0;
  556. }
  557. else
  558. {
  559. vout_height = line_count;
  560. /* Note: We multiply by 2 here to account for pitch */
  561. vout_offset = vout_width * start_line * 2;
  562. }
  563. /* Redundant sanity check... */
  564. vout_height = (vout_height > VOUT_MAX_HEIGHT) ?
  565. VOUT_MAX_HEIGHT : vout_height;
  566. vout_offset = (vout_offset > vout_width * (VOUT_MAX_HEIGHT - 1) * 2) ?
  567. vout_width * (VOUT_MAX_HEIGHT - 1) * 2 : vout_offset;
  568. #endif
  569. Pico.m.dirtyPal = 1;
  570. // Update the geometry
  571. retro_get_system_av_info(&av_info);
  572. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  573. }
  574. void emu_32x_startup(void)
  575. {
  576. PicoDrawSetOutFormat(vout_format, 0);
  577. if ((vm_current_start_line != -1) &&
  578. (vm_current_line_count != -1) &&
  579. (vm_current_is_32cols != -1))
  580. emu_video_mode_change(
  581. vm_current_start_line,
  582. vm_current_line_count,
  583. vm_current_is_32cols);
  584. }
  585. void lprintf(const char *fmt, ...)
  586. {
  587. char buffer[256];
  588. va_list ap;
  589. va_start(ap, fmt);
  590. vsprintf(buffer, fmt, ap);
  591. /* TODO - add 'level' param for warning/error messages? */
  592. if (log_cb)
  593. log_cb(RETRO_LOG_INFO, "%s", buffer);
  594. va_end(ap);
  595. }
  596. /* libretro */
  597. void retro_set_environment(retro_environment_t cb)
  598. {
  599. #ifdef USE_LIBRETRO_VFS
  600. struct retro_vfs_interface_info vfs_iface_info;
  601. #endif
  602. environ_cb = cb;
  603. libretro_set_core_options(environ_cb);
  604. #ifdef USE_LIBRETRO_VFS
  605. vfs_iface_info.required_interface_version = 1;
  606. vfs_iface_info.iface = NULL;
  607. if (environ_cb(RETRO_ENVIRONMENT_GET_VFS_INTERFACE, &vfs_iface_info))
  608. filestream_vfs_init(&vfs_iface_info);
  609. #endif
  610. }
  611. void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
  612. void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
  613. void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
  614. void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
  615. void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
  616. unsigned retro_api_version(void)
  617. {
  618. return RETRO_API_VERSION;
  619. }
  620. void retro_set_controller_port_device(unsigned port, unsigned device)
  621. {
  622. }
  623. void retro_get_system_info(struct retro_system_info *info)
  624. {
  625. memset(info, 0, sizeof(*info));
  626. info->library_name = "PicoDrive";
  627. #ifndef GIT_VERSION
  628. #define _GIT_VERSION ""
  629. #else
  630. #define _GIT_VERSION "-" GIT_VERSION
  631. #endif
  632. info->library_version = VERSION _GIT_VERSION;
  633. info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
  634. info->need_fullpath = true;
  635. }
  636. void retro_get_system_av_info(struct retro_system_av_info *info)
  637. {
  638. float common_width;
  639. memset(info, 0, sizeof(*info));
  640. info->timing.fps = Pico.m.pal ? 50 : 60;
  641. info->timing.sample_rate = PicoIn.sndRate;
  642. info->geometry.base_width = vout_width;
  643. info->geometry.base_height = vout_height;
  644. info->geometry.max_width = vout_width;
  645. info->geometry.max_height = vout_height;
  646. common_width = vout_width;
  647. if (user_vout_width != 0)
  648. common_width = user_vout_width;
  649. info->geometry.aspect_ratio = common_width / vout_height;
  650. }
  651. /* savestates */
  652. struct savestate_state {
  653. const char *load_buf;
  654. char *save_buf;
  655. size_t size;
  656. size_t pos;
  657. };
  658. size_t state_read(void *p, size_t size, size_t nmemb, void *file)
  659. {
  660. struct savestate_state *state = file;
  661. size_t bsize = size * nmemb;
  662. if (state->pos + bsize > state->size) {
  663. if (log_cb)
  664. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  665. state->pos + bsize, state->size);
  666. bsize = state->size - state->pos;
  667. if ((int)bsize <= 0)
  668. return 0;
  669. }
  670. memcpy(p, state->load_buf + state->pos, bsize);
  671. state->pos += bsize;
  672. return bsize;
  673. }
  674. size_t state_write(void *p, size_t size, size_t nmemb, void *file)
  675. {
  676. struct savestate_state *state = file;
  677. size_t bsize = size * nmemb;
  678. if (state->pos + bsize > state->size) {
  679. if (log_cb)
  680. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  681. state->pos + bsize, state->size);
  682. bsize = state->size - state->pos;
  683. if ((int)bsize <= 0)
  684. return 0;
  685. }
  686. memcpy(state->save_buf + state->pos, p, bsize);
  687. state->pos += bsize;
  688. return bsize;
  689. }
  690. size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
  691. {
  692. struct savestate_state *state = file;
  693. size_t bsize = size * nmemb;
  694. state->pos += bsize;
  695. return bsize;
  696. }
  697. size_t state_eof(void *file)
  698. {
  699. struct savestate_state *state = file;
  700. return state->pos >= state->size;
  701. }
  702. int state_fseek(void *file, long offset, int whence)
  703. {
  704. struct savestate_state *state = file;
  705. switch (whence) {
  706. case SEEK_SET:
  707. state->pos = offset;
  708. break;
  709. case SEEK_CUR:
  710. state->pos += offset;
  711. break;
  712. case SEEK_END:
  713. state->pos = state->size + offset;
  714. break;
  715. }
  716. return (int)state->pos;
  717. }
  718. /* savestate sizes vary wildly depending if cd/32x or
  719. * carthw is active, so run the whole thing to get size */
  720. size_t retro_serialize_size(void)
  721. {
  722. struct savestate_state state = { 0, };
  723. int ret;
  724. ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
  725. if (ret != 0)
  726. return 0;
  727. return state.pos;
  728. }
  729. bool retro_serialize(void *data, size_t size)
  730. {
  731. struct savestate_state state = { 0, };
  732. int ret;
  733. state.save_buf = data;
  734. state.size = size;
  735. state.pos = 0;
  736. ret = PicoStateFP(&state, 1, NULL, state_write,
  737. NULL, state_fseek);
  738. return ret == 0;
  739. }
  740. bool retro_unserialize(const void *data, size_t size)
  741. {
  742. struct savestate_state state = { 0, };
  743. int ret;
  744. state.load_buf = data;
  745. state.size = size;
  746. state.pos = 0;
  747. ret = PicoStateFP(&state, 0, state_read, NULL,
  748. state_eof, state_fseek);
  749. return ret == 0;
  750. }
  751. typedef struct patch
  752. {
  753. unsigned int addr;
  754. unsigned short data;
  755. unsigned char comp;
  756. } patch;
  757. extern void decode(char *buff, patch *dest);
  758. extern uint16_t m68k_read16(uint32_t a);
  759. extern void m68k_write16(uint32_t a, uint16_t d);
  760. void retro_cheat_reset(void)
  761. {
  762. int i=0;
  763. unsigned int addr;
  764. for (i = 0; i < PicoPatchCount; i++)
  765. {
  766. addr = PicoPatches[i].addr;
  767. if (addr < Pico.romsize) {
  768. if (PicoPatches[i].active)
  769. *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
  770. } else {
  771. if (PicoPatches[i].active)
  772. m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
  773. }
  774. }
  775. PicoPatchUnload();
  776. }
  777. void retro_cheat_set(unsigned index, bool enabled, const char *code)
  778. {
  779. patch pt;
  780. int array_len = PicoPatchCount;
  781. char codeCopy[256];
  782. char *buff;
  783. if (*code == '\0')
  784. return;
  785. strcpy(codeCopy, code);
  786. buff = strtok(codeCopy,"+");
  787. while (buff != NULL)
  788. {
  789. decode(buff, &pt);
  790. if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
  791. {
  792. log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
  793. return;
  794. }
  795. /* code was good, add it */
  796. if (array_len < PicoPatchCount + 1)
  797. {
  798. void *ptr;
  799. array_len *= 2;
  800. array_len++;
  801. ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
  802. if (ptr == NULL) {
  803. log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
  804. return;
  805. }
  806. PicoPatches = ptr;
  807. }
  808. strcpy(PicoPatches[PicoPatchCount].code, buff);
  809. PicoPatches[PicoPatchCount].active = enabled;
  810. PicoPatches[PicoPatchCount].addr = pt.addr;
  811. PicoPatches[PicoPatchCount].data = pt.data;
  812. PicoPatches[PicoPatchCount].comp = pt.comp;
  813. if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
  814. PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
  815. else
  816. PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
  817. PicoPatchCount++;
  818. buff = strtok(NULL,"+");
  819. }
  820. }
  821. /* multidisk support */
  822. static bool disk_ejected;
  823. static unsigned int disk_current_index;
  824. static unsigned int disk_count;
  825. static struct disks_state {
  826. char *fname;
  827. } disks[8];
  828. static bool disk_set_eject_state(bool ejected)
  829. {
  830. // TODO?
  831. disk_ejected = ejected;
  832. return true;
  833. }
  834. static bool disk_get_eject_state(void)
  835. {
  836. return disk_ejected;
  837. }
  838. static unsigned int disk_get_image_index(void)
  839. {
  840. return disk_current_index;
  841. }
  842. static bool disk_set_image_index(unsigned int index)
  843. {
  844. enum cd_img_type cd_type;
  845. int ret;
  846. if (index >= sizeof(disks) / sizeof(disks[0]))
  847. return false;
  848. if (disks[index].fname == NULL) {
  849. if (log_cb)
  850. log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
  851. // RetroArch specifies "no disk" with index == count,
  852. // so don't fail here..
  853. disk_current_index = index;
  854. return true;
  855. }
  856. if (log_cb)
  857. log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
  858. disks[index].fname);
  859. ret = -1;
  860. cd_type = PicoCdCheck(disks[index].fname, NULL);
  861. if (cd_type != CIT_NOT_CD)
  862. ret = cdd_load(disks[index].fname, cd_type);
  863. if (ret != 0) {
  864. if (log_cb)
  865. log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
  866. return 0;
  867. }
  868. disk_current_index = index;
  869. return true;
  870. }
  871. static unsigned int disk_get_num_images(void)
  872. {
  873. return disk_count;
  874. }
  875. static bool disk_replace_image_index(unsigned index,
  876. const struct retro_game_info *info)
  877. {
  878. bool ret = true;
  879. if (index >= sizeof(disks) / sizeof(disks[0]))
  880. return false;
  881. if (disks[index].fname != NULL)
  882. free(disks[index].fname);
  883. disks[index].fname = NULL;
  884. if (info != NULL) {
  885. disks[index].fname = strdup(info->path);
  886. if (index == disk_current_index)
  887. ret = disk_set_image_index(index);
  888. }
  889. return ret;
  890. }
  891. static bool disk_add_image_index(void)
  892. {
  893. if (disk_count >= sizeof(disks) / sizeof(disks[0]))
  894. return false;
  895. disk_count++;
  896. return true;
  897. }
  898. static struct retro_disk_control_callback disk_control = {
  899. disk_set_eject_state,
  900. disk_get_eject_state,
  901. disk_get_image_index,
  902. disk_set_image_index,
  903. disk_get_num_images,
  904. disk_replace_image_index,
  905. disk_add_image_index,
  906. };
  907. static void disk_tray_open(void)
  908. {
  909. if (log_cb)
  910. log_cb(RETRO_LOG_INFO, "cd tray open\n");
  911. disk_ejected = 1;
  912. }
  913. static void disk_tray_close(void)
  914. {
  915. if (log_cb)
  916. log_cb(RETRO_LOG_INFO, "cd tray close\n");
  917. disk_ejected = 0;
  918. }
  919. static const char * const biosfiles_us[] = {
  920. "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
  921. };
  922. static const char * const biosfiles_eu[] = {
  923. "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
  924. };
  925. static const char * const biosfiles_jp[] = {
  926. "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
  927. };
  928. static void make_system_path(char *buf, size_t buf_size,
  929. const char *name, const char *ext)
  930. {
  931. const char *dir = NULL;
  932. if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
  933. snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
  934. }
  935. else {
  936. snprintf(buf, buf_size, "%s%s", name, ext);
  937. }
  938. }
  939. static const char *find_bios(int *region, const char *cd_fname)
  940. {
  941. const char * const *files;
  942. static char path[256];
  943. int i, count;
  944. FILE *f = NULL;
  945. if (*region == 4) { // US
  946. files = biosfiles_us;
  947. count = sizeof(biosfiles_us) / sizeof(char *);
  948. } else if (*region == 8) { // EU
  949. files = biosfiles_eu;
  950. count = sizeof(biosfiles_eu) / sizeof(char *);
  951. } else if (*region == 1 || *region == 2) {
  952. files = biosfiles_jp;
  953. count = sizeof(biosfiles_jp) / sizeof(char *);
  954. } else {
  955. return NULL;
  956. }
  957. for (i = 0; i < count; i++)
  958. {
  959. make_system_path(path, sizeof(path), files[i], ".bin");
  960. f = fopen(path, "rb");
  961. if (f != NULL)
  962. break;
  963. make_system_path(path, sizeof(path), files[i], ".zip");
  964. f = fopen(path, "rb");
  965. if (f != NULL)
  966. break;
  967. }
  968. if (f != NULL) {
  969. if (log_cb)
  970. log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
  971. fclose(f);
  972. return path;
  973. }
  974. return NULL;
  975. }
  976. static void set_memory_maps(void)
  977. {
  978. if (PicoIn.AHW & PAHW_MCD)
  979. {
  980. const size_t SCD_BIT = 1ULL << 31ULL;
  981. const uint64_t mem = RETRO_MEMDESC_SYSTEM_RAM;
  982. struct retro_memory_map mmaps;
  983. struct retro_memory_descriptor descs[] = {
  984. { mem, PicoMem.ram, 0, 0xFF0000, 0, 0, 0x10000, "68KRAM" },
  985. /* virtual address using SCD_BIT so all 512M of prg_ram can be accessed */
  986. /* at address $80020000 */
  987. { mem, Pico_mcd->prg_ram, 0, SCD_BIT | 0x020000, 0, 0, 0x80000, "PRGRAM" },
  988. };
  989. mmaps.descriptors = descs;
  990. mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
  991. environ_cb(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
  992. }
  993. }
  994. bool retro_load_game(const struct retro_game_info *info)
  995. {
  996. enum media_type_e media_type;
  997. static char carthw_path[256];
  998. size_t i;
  999. struct retro_input_descriptor desc[] = {
  1000. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1001. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1002. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1003. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1004. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  1005. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  1006. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  1007. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  1008. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  1009. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  1010. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  1011. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  1012. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1013. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1014. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1015. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1016. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  1017. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  1018. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  1019. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  1020. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  1021. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  1022. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  1023. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  1024. { 0 },
  1025. };
  1026. struct retro_input_descriptor desc_sms[] = {
  1027. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1028. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1029. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1030. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1031. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  1032. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  1033. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  1034. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1035. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1036. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1037. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1038. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  1039. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  1040. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  1041. { 0 },
  1042. };
  1043. enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
  1044. if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
  1045. if (log_cb)
  1046. log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
  1047. return false;
  1048. }
  1049. if (info == NULL || info->path == NULL) {
  1050. if (log_cb)
  1051. log_cb(RETRO_LOG_ERROR, "info->path required\n");
  1052. return false;
  1053. }
  1054. for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
  1055. if (disks[i].fname != NULL) {
  1056. free(disks[i].fname);
  1057. disks[i].fname = NULL;
  1058. }
  1059. }
  1060. disk_current_index = 0;
  1061. disk_count = 1;
  1062. disks[0].fname = strdup(info->path);
  1063. make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
  1064. media_type = PicoLoadMedia(info->path, carthw_path,
  1065. find_bios, NULL);
  1066. switch (media_type) {
  1067. case PM_BAD_DETECT:
  1068. if (log_cb)
  1069. log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
  1070. return false;
  1071. case PM_BAD_CD:
  1072. if (log_cb)
  1073. log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
  1074. return false;
  1075. case PM_BAD_CD_NO_BIOS:
  1076. if (log_cb)
  1077. log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
  1078. return false;
  1079. case PM_ERROR:
  1080. if (log_cb)
  1081. log_cb(RETRO_LOG_ERROR, "Load error\n");
  1082. return false;
  1083. default:
  1084. break;
  1085. }
  1086. if (media_type == PM_MARK3)
  1087. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
  1088. else
  1089. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
  1090. PicoLoopPrepare();
  1091. PicoIn.writeSound = snd_write;
  1092. memset(sndBuffer, 0, sizeof(sndBuffer));
  1093. PicoIn.sndOut = sndBuffer;
  1094. PsndRerate(0);
  1095. /* Setup retro memory maps */
  1096. set_memory_maps();
  1097. init_frameskip();
  1098. return true;
  1099. }
  1100. bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
  1101. {
  1102. return false;
  1103. }
  1104. void retro_unload_game(void)
  1105. {
  1106. }
  1107. unsigned retro_get_region(void)
  1108. {
  1109. return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
  1110. }
  1111. void *retro_get_memory_data(unsigned type)
  1112. {
  1113. uint8_t* data;
  1114. switch(type)
  1115. {
  1116. case RETRO_MEMORY_SAVE_RAM:
  1117. /* Note: MCD RAM cart uses Pico.sv.data */
  1118. if ((PicoIn.AHW & PAHW_MCD) &&
  1119. !(PicoIn.opt & POPT_EN_MCD_RAMCART))
  1120. data = Pico_mcd->bram;
  1121. else
  1122. data = Pico.sv.data;
  1123. break;
  1124. case RETRO_MEMORY_SYSTEM_RAM:
  1125. if (PicoIn.AHW & PAHW_SMS)
  1126. data = PicoMem.zram;
  1127. else
  1128. data = PicoMem.ram;
  1129. break;
  1130. default:
  1131. data = NULL;
  1132. break;
  1133. }
  1134. return data;
  1135. }
  1136. size_t retro_get_memory_size(unsigned type)
  1137. {
  1138. unsigned int i;
  1139. int sum;
  1140. switch(type)
  1141. {
  1142. case RETRO_MEMORY_SAVE_RAM:
  1143. if (PicoIn.AHW & PAHW_MCD)
  1144. {
  1145. if (PicoIn.opt & POPT_EN_MCD_RAMCART)
  1146. return 0x12000;
  1147. else /* bram */
  1148. return 0x2000;
  1149. }
  1150. if (Pico.m.frame_count == 0)
  1151. return Pico.sv.size;
  1152. // if game doesn't write to sram, don't report it to
  1153. // libretro so that RA doesn't write out zeroed .srm
  1154. for (i = 0, sum = 0; i < Pico.sv.size; i++)
  1155. sum |= Pico.sv.data[i];
  1156. return (sum != 0) ? Pico.sv.size : 0;
  1157. case RETRO_MEMORY_SYSTEM_RAM:
  1158. if (PicoIn.AHW & PAHW_SMS)
  1159. return 0x2000;
  1160. else
  1161. return sizeof(PicoMem.ram);
  1162. default:
  1163. return 0;
  1164. }
  1165. }
  1166. void retro_reset(void)
  1167. {
  1168. PicoReset();
  1169. }
  1170. static const unsigned short retro_pico_map[] = {
  1171. 1 << GBTN_B,
  1172. 1 << GBTN_A,
  1173. 1 << GBTN_MODE,
  1174. 1 << GBTN_START,
  1175. 1 << GBTN_UP,
  1176. 1 << GBTN_DOWN,
  1177. 1 << GBTN_LEFT,
  1178. 1 << GBTN_RIGHT,
  1179. 1 << GBTN_C,
  1180. 1 << GBTN_Y,
  1181. 1 << GBTN_X,
  1182. 1 << GBTN_Z,
  1183. };
  1184. #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
  1185. static void snd_write(int len)
  1186. {
  1187. audio_batch_cb(PicoIn.sndOut, len / 4);
  1188. }
  1189. static enum input_device input_name_to_val(const char *name)
  1190. {
  1191. if (strcmp(name, "3 button pad") == 0)
  1192. return PICO_INPUT_PAD_3BTN;
  1193. if (strcmp(name, "6 button pad") == 0)
  1194. return PICO_INPUT_PAD_6BTN;
  1195. if (strcmp(name, "None") == 0)
  1196. return PICO_INPUT_NOTHING;
  1197. if (log_cb)
  1198. log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
  1199. return PICO_INPUT_PAD_3BTN;
  1200. }
  1201. static void update_variables(bool first_run)
  1202. {
  1203. struct retro_variable var;
  1204. int OldPicoRegionOverride;
  1205. float old_user_vout_width;
  1206. unsigned old_frameskip_type;
  1207. int old_vout_format;
  1208. double new_sound_rate;
  1209. var.value = NULL;
  1210. var.key = "picodrive_input1";
  1211. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1212. PicoSetInputDevice(0, input_name_to_val(var.value));
  1213. var.value = NULL;
  1214. var.key = "picodrive_input2";
  1215. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1216. PicoSetInputDevice(1, input_name_to_val(var.value));
  1217. var.value = NULL;
  1218. var.key = "picodrive_sprlim";
  1219. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1220. if (strcmp(var.value, "enabled") == 0)
  1221. PicoIn.opt |= POPT_DIS_SPRITE_LIM;
  1222. else
  1223. PicoIn.opt &= ~POPT_DIS_SPRITE_LIM;
  1224. }
  1225. var.value = NULL;
  1226. var.key = "picodrive_ramcart";
  1227. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1228. if (strcmp(var.value, "enabled") == 0)
  1229. PicoIn.opt |= POPT_EN_MCD_RAMCART;
  1230. else
  1231. PicoIn.opt &= ~POPT_EN_MCD_RAMCART;
  1232. }
  1233. OldPicoRegionOverride = PicoIn.regionOverride;
  1234. var.value = NULL;
  1235. var.key = "picodrive_region";
  1236. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1237. if (strcmp(var.value, "Auto") == 0)
  1238. PicoIn.regionOverride = 0;
  1239. else if (strcmp(var.value, "Japan NTSC") == 0)
  1240. PicoIn.regionOverride = 1;
  1241. else if (strcmp(var.value, "Japan PAL") == 0)
  1242. PicoIn.regionOverride = 2;
  1243. else if (strcmp(var.value, "US") == 0)
  1244. PicoIn.regionOverride = 4;
  1245. else if (strcmp(var.value, "Europe") == 0)
  1246. PicoIn.regionOverride = 8;
  1247. }
  1248. // Update region, fps and sound flags if needed
  1249. if (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)
  1250. {
  1251. PicoDetectRegion();
  1252. PicoLoopPrepare();
  1253. PsndRerate(1);
  1254. }
  1255. old_user_vout_width = user_vout_width;
  1256. var.value = NULL;
  1257. var.key = "picodrive_aspect";
  1258. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1259. if (strcmp(var.value, "4/3") == 0)
  1260. user_vout_width = VOUT_4_3;
  1261. else if (strcmp(var.value, "CRT") == 0)
  1262. user_vout_width = VOUT_CRT;
  1263. else
  1264. user_vout_width = VOUT_PAR;
  1265. }
  1266. if (user_vout_width != old_user_vout_width)
  1267. {
  1268. // Update the geometry
  1269. struct retro_system_av_info av_info;
  1270. retro_get_system_av_info(&av_info);
  1271. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  1272. }
  1273. old_show_overscan = show_overscan;
  1274. var.value = NULL;
  1275. var.key = "picodrive_overscan";
  1276. show_overscan = false;
  1277. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1278. if (strcmp(var.value, "enabled") == 0)
  1279. show_overscan = true;
  1280. }
  1281. var.value = NULL;
  1282. var.key = "picodrive_overclk68k";
  1283. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1284. PicoIn.overclockM68k = 0;
  1285. if (var.value[0] == '+')
  1286. PicoIn.overclockM68k = atoi(var.value + 1);
  1287. }
  1288. #ifdef DRC_SH2
  1289. var.value = NULL;
  1290. var.key = "picodrive_drc";
  1291. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1292. if (strcmp(var.value, "enabled") == 0)
  1293. PicoIn.opt |= POPT_EN_DRC;
  1294. else
  1295. PicoIn.opt &= ~POPT_EN_DRC;
  1296. }
  1297. #endif
  1298. #ifdef _3DS
  1299. if(!ctr_svchack_successful)
  1300. PicoIn.opt &= ~POPT_EN_DRC;
  1301. #endif
  1302. var.value = NULL;
  1303. var.key = "picodrive_audio_filter";
  1304. PicoIn.sndFilter = 0;
  1305. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1306. if (strcmp(var.value, "low-pass") == 0)
  1307. PicoIn.sndFilter = 1;
  1308. }
  1309. var.value = NULL;
  1310. var.key = "picodrive_lowpass_range";
  1311. PicoIn.sndFilterRange = (60 * 65536) / 100;
  1312. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1313. PicoIn.sndFilterRange = (atoi(var.value) * 65536) / 100;
  1314. }
  1315. old_frameskip_type = frameskip_type;
  1316. frameskip_type = 0;
  1317. var.key = "picodrive_frameskip";
  1318. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1319. if (strcmp(var.value, "auto") == 0)
  1320. frameskip_type = 1;
  1321. else if (strcmp(var.value, "manual") == 0)
  1322. frameskip_type = 2;
  1323. }
  1324. frameskip_threshold = 33;
  1325. var.key = "picodrive_frameskip_threshold";
  1326. var.value = NULL;
  1327. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1328. frameskip_threshold = strtol(var.value, NULL, 10);
  1329. old_vout_format = vout_format;
  1330. var.value = NULL;
  1331. var.key = "picodrive_renderer";
  1332. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1333. if (strcmp(var.value, "fast") == 0)
  1334. vout_format = PDF_NONE;
  1335. else if (strcmp(var.value, "good") == 0)
  1336. vout_format = PDF_8BIT;
  1337. else if (strcmp(var.value, "accurate") == 0)
  1338. vout_format = PDF_RGB555;
  1339. PicoIn.opt &= ~POPT_ALT_RENDERER;
  1340. if (vout_format == PDF_NONE)
  1341. PicoIn.opt |= POPT_ALT_RENDERER;
  1342. PicoDrawSetOutFormat(vout_format, 0);
  1343. }
  1344. var.value = NULL;
  1345. var.key = "picodrive_sound_rate";
  1346. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1347. new_sound_rate = atoi(var.value);
  1348. if (new_sound_rate != PicoIn.sndRate) {
  1349. /* Update the sound rate */
  1350. PicoIn.sndRate = new_sound_rate;
  1351. PsndRerate(1);
  1352. struct retro_system_av_info av_info;
  1353. retro_get_system_av_info(&av_info);
  1354. environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &av_info);
  1355. }
  1356. }
  1357. /* setup video if required */
  1358. if (show_overscan != old_show_overscan || vout_format != old_vout_format)
  1359. {
  1360. if ((vm_current_start_line != -1) &&
  1361. (vm_current_line_count != -1) &&
  1362. (vm_current_is_32cols != -1))
  1363. emu_video_mode_change(
  1364. vm_current_start_line,
  1365. vm_current_line_count,
  1366. vm_current_is_32cols);
  1367. }
  1368. /* Reinitialise frameskipping, if required */
  1369. if (((frameskip_type != old_frameskip_type) ||
  1370. (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)) &&
  1371. !first_run)
  1372. init_frameskip();
  1373. }
  1374. void retro_run(void)
  1375. {
  1376. bool updated = false;
  1377. int pad, i;
  1378. static void *buff;
  1379. PicoIn.skipFrame = 0;
  1380. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
  1381. update_variables(false);
  1382. input_poll_cb();
  1383. PicoIn.pad[0] = PicoIn.pad[1] = 0;
  1384. for (pad = 0; pad < 2; pad++)
  1385. for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
  1386. if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
  1387. PicoIn.pad[pad] |= retro_pico_map[i];
  1388. if (PicoPatches)
  1389. PicoPatchApply();
  1390. /* Check whether current frame should
  1391. * be skipped */
  1392. if ((frameskip_type > 0) && retro_audio_buff_active) {
  1393. switch (frameskip_type)
  1394. {
  1395. case 1: /* auto */
  1396. PicoIn.skipFrame = retro_audio_buff_underrun ? 1 : 0;
  1397. break;
  1398. case 2: /* manual */
  1399. PicoIn.skipFrame = (retro_audio_buff_occupancy < frameskip_threshold) ? 1 : 0;
  1400. break;
  1401. default:
  1402. PicoIn.skipFrame = 0;
  1403. break;
  1404. }
  1405. if (!PicoIn.skipFrame || (frameskip_counter >= FRAMESKIP_MAX)) {
  1406. PicoIn.skipFrame = 0;
  1407. frameskip_counter = 0;
  1408. } else
  1409. frameskip_counter++;
  1410. }
  1411. /* If frameskip settings have changed, update
  1412. * frontend audio latency */
  1413. if (update_audio_latency) {
  1414. environ_cb(RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY,
  1415. &audio_latency);
  1416. update_audio_latency = false;
  1417. }
  1418. PicoFrame();
  1419. /* If frame was skipped, call video_cb() with
  1420. * a NULL buffer and return immediately */
  1421. if (PicoIn.skipFrame) {
  1422. video_cb(NULL, vout_width, vout_height, vout_width * 2);
  1423. return;
  1424. }
  1425. #if defined(RENDER_GSKIT_PS2)
  1426. buff = (uint32_t *)RETRO_HW_FRAME_BUFFER_VALID;
  1427. if (!ps2) {
  1428. // get access to the graphics hardware
  1429. if (!environ_cb(RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE, (void **)&ps2) || !ps2) {
  1430. printf("Failed to get HW rendering interface!\n");
  1431. return;
  1432. }
  1433. if (ps2->interface_version != RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION) {
  1434. printf("HW render interface mismatch, expected %u, got %u!\n",
  1435. RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION, ps2->interface_version);
  1436. return;
  1437. }
  1438. ps2->coreTexture->ClutPSM = GS_PSM_CT16;
  1439. ps2->coreTexture->Filter = GS_FILTER_LINEAR;
  1440. ps2->coreTexture->Clut = retro_palette;
  1441. ps2->coreTexture->Mem = vout_buf;
  1442. ps2->coreTexture->Width = vout_width;
  1443. ps2->coreTexture->Height = vout_height;
  1444. ps2->coreTexture->PSM = (vout_16bit ? GS_PSM_CT16 : GS_PSM_T8);
  1445. ps2->padding = padding;
  1446. }
  1447. // CLUT update needed?
  1448. if (!vout_16bit && Pico.m.dirtyPal) {
  1449. PicoDrawUpdateHighPal();
  1450. // Rotate CLUT. PS2 is special since entries in CLUT are not in sequence.
  1451. unsigned short int *pal=(void *)retro_palette;
  1452. for (i = 0; i < 256; i+=8) {
  1453. if ((i&0x18) == 0x08)
  1454. memcpy(pal+i,Pico.est.HighPal+i+8,16);
  1455. else if ((i&0x18) == 0x10)
  1456. memcpy(pal+i,Pico.est.HighPal+i-8,16);
  1457. else
  1458. memcpy(pal+i,Pico.est.HighPal+i,16);
  1459. }
  1460. }
  1461. #else
  1462. if (!vout_16bit) {
  1463. /* The 8 bit renderers write a CLUT image in Pico.est.Draw2FB, while libretro wants RGB in vout_buf.
  1464. * We need to manually copy that to vout_buf, applying the CLUT on the way. Especially
  1465. * with the fast renderer this is improving performance, at the expense of accuracy.
  1466. */
  1467. /* This section is mostly copied from pemu_finalize_frame in platform/linux/emu.c */
  1468. unsigned short *pd = (unsigned short *)vout_buf;
  1469. /* Skip the leftmost 8 columns (it is used as an overlap area for rendering) */
  1470. unsigned char *ps = Pico.est.Draw2FB + 8;
  1471. unsigned short *pal = Pico.est.HighPal;
  1472. int x;
  1473. if (Pico.m.dirtyPal)
  1474. PicoDrawUpdateHighPal();
  1475. /* Copy up to the max height to include the overscan area, and skip the leftmost 8 columns again */
  1476. for (i = 0; i < VOUT_MAX_HEIGHT; i++, ps += 8) {
  1477. for (x = 0; x < vout_width; x+=4) {
  1478. *pd++ = pal[*ps++];
  1479. *pd++ = pal[*ps++];
  1480. *pd++ = pal[*ps++];
  1481. *pd++ = pal[*ps++];
  1482. }
  1483. ps += 320-vout_width; /* Advance to next line in case of 32col mode */
  1484. }
  1485. }
  1486. buff = (char*)vout_buf + vout_offset;
  1487. #endif
  1488. video_cb((short *)buff,
  1489. vout_width, vout_height, vout_width * 2);
  1490. }
  1491. void retro_init(void)
  1492. {
  1493. struct retro_log_callback log;
  1494. int level;
  1495. level = 0;
  1496. environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
  1497. if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
  1498. log_cb = log.log;
  1499. else
  1500. log_cb = NULL;
  1501. environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
  1502. #ifdef _3DS
  1503. ctr_svchack_successful = ctr_svchack_init();
  1504. check_rosalina();
  1505. #elif defined(VITA)
  1506. sceBlock = getVMBlock();
  1507. #endif
  1508. PicoIn.opt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80|POPT_EN_YM2413
  1509. | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
  1510. | POPT_EN_32X|POPT_EN_PWM
  1511. | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
  1512. #ifdef __arm__
  1513. #ifdef _3DS
  1514. if (ctr_svchack_successful)
  1515. #endif
  1516. PicoIn.opt |= POPT_EN_DRC;
  1517. #endif
  1518. struct retro_variable var = { .key = "picodrive_sound_rate" };
  1519. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1520. PicoIn.sndRate = atoi(var.value);
  1521. else
  1522. PicoIn.sndRate = INITIAL_SND_RATE;
  1523. PicoIn.autoRgnOrder = 0x184; // US, EU, JP
  1524. vout_width = VOUT_MAX_WIDTH;
  1525. vout_height = VOUT_MAX_HEIGHT;
  1526. #ifdef _3DS
  1527. vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
  1528. #elif defined(RENDER_GSKIT_PS2)
  1529. vout_buf = memalign(4096, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  1530. retro_palette = memalign(128, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
  1531. #else
  1532. vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  1533. #endif
  1534. PicoInit();
  1535. //PicoIn.osdMessage = plat_status_msg_busy_next;
  1536. PicoIn.mcdTrayOpen = disk_tray_open;
  1537. PicoIn.mcdTrayClose = disk_tray_close;
  1538. frameskip_type = 0;
  1539. frameskip_threshold = 0;
  1540. frameskip_counter = 0;
  1541. retro_audio_buff_active = false;
  1542. retro_audio_buff_occupancy = 0;
  1543. retro_audio_buff_underrun = false;
  1544. audio_latency = 0;
  1545. update_audio_latency = false;
  1546. update_variables(true);
  1547. }
  1548. void retro_deinit(void)
  1549. {
  1550. #ifdef _3DS
  1551. linearFree(vout_buf);
  1552. #elif defined(RENDER_GSKIT_PS2)
  1553. free(vout_buf);
  1554. free(retro_palette);
  1555. ps2 = NULL;
  1556. #else
  1557. free(vout_buf);
  1558. #endif
  1559. vout_buf = NULL;
  1560. PicoExit();
  1561. }