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 <malloc.h>
  38. #include "libretro-common/include/libretro_gskit_ps2.h"
  39. #include "ps2/asm.h"
  40. #endif
  41. #ifdef _3DS
  42. #include "3ds/3ds_utils.h"
  43. #define MEMOP_MAP 4
  44. #define MEMOP_UNMAP 5
  45. #define MEMOP_PROT 6
  46. int svcDuplicateHandle(unsigned int* out, unsigned int original);
  47. int svcCloseHandle(unsigned int handle);
  48. int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
  49. unsigned int size, unsigned int type, unsigned int perm);
  50. void* linearMemAlign(size_t size, size_t alignment);
  51. void linearFree(void* mem);
  52. static int ctr_svchack_successful = 0;
  53. #elif defined(VITA)
  54. #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
  55. #include <psp2/kernel/sysmem.h>
  56. static int sceBlock;
  57. int getVMBlock();
  58. int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
  59. #endif
  60. #include "libretro_core_options.h"
  61. #include <pico/pico_int.h>
  62. #include <pico/state.h>
  63. #include <pico/patch.h>
  64. #include <pico/sound/mix.h>
  65. #include "../common/input_pico.h"
  66. #include "../common/version.h"
  67. #include <libretro.h>
  68. static retro_log_printf_t log_cb;
  69. static retro_video_refresh_t video_cb;
  70. static retro_input_poll_t input_poll_cb;
  71. static retro_input_state_t input_state_cb;
  72. static retro_environment_t environ_cb;
  73. static retro_audio_sample_batch_t audio_batch_cb;
  74. #define VOUT_MAX_WIDTH 320
  75. #define VOUT_32COL_WIDTH 256
  76. #define VOUT_MAX_HEIGHT 240
  77. #define INITIAL_SND_RATE 44100
  78. static const float VOUT_PAR = 0.0;
  79. static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
  80. static const float VOUT_CRT = (224.0f * 1.29911f);
  81. static bool show_overscan = false;
  82. static bool old_show_overscan = false;
  83. /* Required to allow on the fly changes to 'show overscan' */
  84. static int vm_current_start_line = -1;
  85. static int vm_current_line_count = -1;
  86. static int vm_current_is_32cols = -1;
  87. static int vout_16bit = 1;
  88. static int vout_format = PDF_RGB555;
  89. static void *vout_buf;
  90. static int vout_width, vout_height, vout_offset;
  91. static float user_vout_width = 0.0;
  92. #if defined(RENDER_GSKIT_PS2)
  93. #define VOUT_8BIT_WIDTH 328
  94. #define VOUT_8BIT_HEIGHT 256
  95. RETRO_HW_RENDER_INTEFACE_GSKIT_PS2 *ps2 = NULL;
  96. static void *retro_palette;
  97. static struct retro_hw_ps2_insets padding;
  98. #endif
  99. static short ALIGNED(4) sndBuffer[2*INITIAL_SND_RATE/50];
  100. static void snd_write(int len);
  101. char **g_argv;
  102. #ifdef _WIN32
  103. #define SLASH '\\'
  104. #else
  105. #define SLASH '/'
  106. #endif
  107. /* Frameskipping Support */
  108. static unsigned frameskip_type = 0;
  109. static unsigned frameskip_threshold = 0;
  110. static uint16_t frameskip_counter = 0;
  111. static bool retro_audio_buff_active = false;
  112. static unsigned retro_audio_buff_occupancy = 0;
  113. static bool retro_audio_buff_underrun = false;
  114. /* Maximum number of consecutive frames that
  115. * can be skipped */
  116. #define FRAMESKIP_MAX 60
  117. static unsigned audio_latency = 0;
  118. static bool update_audio_latency = false;
  119. static void retro_audio_buff_status_cb(
  120. bool active, unsigned occupancy, bool underrun_likely)
  121. {
  122. retro_audio_buff_active = active;
  123. retro_audio_buff_occupancy = occupancy;
  124. retro_audio_buff_underrun = underrun_likely;
  125. }
  126. static void init_frameskip(void)
  127. {
  128. if (frameskip_type > 0)
  129. {
  130. struct retro_audio_buffer_status_callback buf_status_cb;
  131. buf_status_cb.callback = retro_audio_buff_status_cb;
  132. if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK,
  133. &buf_status_cb))
  134. {
  135. if (log_cb)
  136. log_cb(RETRO_LOG_WARN, "Frameskip disabled - frontend does not support audio buffer status monitoring.\n");
  137. retro_audio_buff_active = false;
  138. retro_audio_buff_occupancy = 0;
  139. retro_audio_buff_underrun = false;
  140. audio_latency = 0;
  141. }
  142. else
  143. {
  144. /* Frameskip is enabled - increase frontend
  145. * audio latency to minimise potential
  146. * buffer underruns */
  147. float frame_time_msec = 1000.0f / (Pico.m.pal ? 50.0f : 60.0f);
  148. /* Set latency to 6x current frame time... */
  149. audio_latency = (unsigned)((6.0f * frame_time_msec) + 0.5f);
  150. /* ...then round up to nearest multiple of 32 */
  151. audio_latency = (audio_latency + 0x1F) & ~0x1F;
  152. }
  153. }
  154. else
  155. {
  156. environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL);
  157. audio_latency = 0;
  158. }
  159. update_audio_latency = true;
  160. }
  161. /* functions called by the core */
  162. void cache_flush_d_inval_i(void *start, void *end)
  163. {
  164. #ifdef __arm__
  165. size_t len = (char *)end - (char *)start;
  166. (void)len;
  167. #if defined(__BLACKBERRY_QNX__)
  168. msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
  169. #elif defined(__MACH__)
  170. sys_dcache_flush(start, len);
  171. sys_icache_invalidate(start, len);
  172. #elif defined(_3DS)
  173. ctr_flush_invalidate_cache();
  174. #elif defined(VITA)
  175. sceKernelSyncVMDomain(sceBlock, start, len);
  176. #else
  177. __clear_cache(start, end);
  178. #endif
  179. #endif
  180. }
  181. #ifdef RENDER_GSKIT_PS2
  182. /* ee-gcc is version 3.2, where these aren't yet defined */
  183. void __builtin___clear_cache(void *b, void *e)
  184. {
  185. #if 0 /* which of these is overall faster for lots of small cache updates? */
  186. SyncDCache(b, e);
  187. #else
  188. FlushCache(0); /* WRITEBACK_DCACHE */
  189. #endif
  190. FlushCache(2); /* INVALIDATE_ICACHE */
  191. }
  192. int __builtin_parity(unsigned v)
  193. {
  194. /* credits to bit twiddling hacks, https://graphics.stanford.edu/~seander/bithacks.html */
  195. v ^= v >> 16;
  196. v ^= v >> 8;
  197. v ^= v >> 4;
  198. return (0x6996 >> (v&0xf)) & 1;
  199. }
  200. #endif
  201. #ifdef __MACH__
  202. /* calls to this may be generated by the compiler, but it's missing in libc? */
  203. void __clear_cache(void *start, void *end)
  204. {
  205. size_t len = (char *)end - (char *)start;
  206. sys_dcache_flush(start, len);
  207. sys_icache_invalidate(start, len);
  208. }
  209. #endif
  210. #ifdef _WIN32
  211. /* mmap() replacement for Windows
  212. *
  213. * Author: Mike Frysinger <vapier@gentoo.org>
  214. * Placed into the public domain
  215. */
  216. /* References:
  217. * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
  218. * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
  219. * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
  220. * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
  221. */
  222. #define PROT_READ 0x1
  223. #define PROT_WRITE 0x2
  224. /* This flag is only available in WinXP+ */
  225. #ifdef FILE_MAP_EXECUTE
  226. #define PROT_EXEC 0x4
  227. #else
  228. #define PROT_EXEC 0x0
  229. #define FILE_MAP_EXECUTE 0
  230. #endif
  231. #define MAP_SHARED 0x01
  232. #define MAP_PRIVATE 0x02
  233. #define MAP_ANONYMOUS 0x20
  234. #define MAP_ANON MAP_ANONYMOUS
  235. #define MAP_FAILED ((void *) -1)
  236. #ifdef __USE_FILE_OFFSET64
  237. # define DWORD_HI(x) (x >> 32)
  238. # define DWORD_LO(x) ((x) & 0xffffffff)
  239. #else
  240. # define DWORD_HI(x) (0)
  241. # define DWORD_LO(x) (x)
  242. #endif
  243. static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
  244. {
  245. uint32_t flProtect, dwDesiredAccess;
  246. off_t end;
  247. HANDLE mmap_fd, h;
  248. void *ret;
  249. if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
  250. return MAP_FAILED;
  251. if (fd == -1) {
  252. if (!(flags & MAP_ANON) || offset)
  253. return MAP_FAILED;
  254. } else if (flags & MAP_ANON)
  255. return MAP_FAILED;
  256. if (prot & PROT_WRITE) {
  257. if (prot & PROT_EXEC)
  258. flProtect = PAGE_EXECUTE_READWRITE;
  259. else
  260. flProtect = PAGE_READWRITE;
  261. } else if (prot & PROT_EXEC) {
  262. if (prot & PROT_READ)
  263. flProtect = PAGE_EXECUTE_READ;
  264. else if (prot & PROT_EXEC)
  265. flProtect = PAGE_EXECUTE;
  266. } else
  267. flProtect = PAGE_READONLY;
  268. end = length + offset;
  269. if (fd == -1)
  270. mmap_fd = INVALID_HANDLE_VALUE;
  271. else
  272. mmap_fd = (HANDLE)_get_osfhandle(fd);
  273. h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
  274. if (h == NULL)
  275. return MAP_FAILED;
  276. if (prot & PROT_WRITE)
  277. dwDesiredAccess = FILE_MAP_WRITE;
  278. else
  279. dwDesiredAccess = FILE_MAP_READ;
  280. if (prot & PROT_EXEC)
  281. dwDesiredAccess |= FILE_MAP_EXECUTE;
  282. if (flags & MAP_PRIVATE)
  283. dwDesiredAccess |= FILE_MAP_COPY;
  284. ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
  285. if (ret == NULL) {
  286. CloseHandle(h);
  287. ret = MAP_FAILED;
  288. }
  289. return ret;
  290. }
  291. static void munmap(void *addr, size_t length)
  292. {
  293. UnmapViewOfFile(addr);
  294. /* ruh-ro, we leaked handle from CreateFileMapping() ... */
  295. }
  296. #elif defined(NO_MMAP)
  297. #define PROT_EXEC 0x04
  298. #define MAP_FAILED 0
  299. #define PROT_READ 0
  300. #define PROT_WRITE 0
  301. #define MAP_PRIVATE 0
  302. #define MAP_ANONYMOUS 0
  303. void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
  304. {
  305. return malloc(len);
  306. }
  307. void munmap(void *base_addr, size_t len)
  308. {
  309. free(base_addr);
  310. }
  311. int mprotect(void *addr, size_t len, int prot)
  312. {
  313. /* stub - not really needed at this point since this codepath has no dynarecs */
  314. return 0;
  315. }
  316. #endif
  317. #ifndef MAP_ANONYMOUS
  318. #define MAP_ANONYMOUS MAP_ANON
  319. #endif
  320. #ifdef _3DS
  321. typedef struct
  322. {
  323. unsigned int requested_map;
  324. void* buffer;
  325. }pico_mmap_t;
  326. pico_mmap_t pico_mmaps[] = {
  327. {0x02000000, 0},
  328. {0x06000000, 0},
  329. {NULL, 0}
  330. };
  331. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  332. {
  333. (void)is_fixed;
  334. if (ctr_svchack_successful)
  335. {
  336. pico_mmap_t* pico_mmap;
  337. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  338. {
  339. if ((pico_mmap->requested_map == addr))
  340. {
  341. unsigned int ptr_aligned, tmp;
  342. unsigned int currentHandle;
  343. unsigned int perm = 0b011;
  344. if (need_exec)
  345. perm = 0b111;
  346. size = (size + 0xFFF) & ~0xFFF;
  347. pico_mmap->buffer = malloc(size + 0x1000);
  348. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  349. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  350. if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
  351. {
  352. if (log_cb)
  353. log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
  354. exit(1);
  355. }
  356. svcCloseHandle(currentHandle);
  357. return (void*)pico_mmap->requested_map;
  358. }
  359. }
  360. }
  361. return malloc(size);
  362. }
  363. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  364. {
  365. if (ctr_svchack_successful)
  366. {
  367. pico_mmap_t* pico_mmap;
  368. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  369. {
  370. if ((pico_mmap->requested_map == (unsigned int)ptr))
  371. {
  372. unsigned int ptr_aligned;
  373. unsigned int currentHandle;
  374. void* tmp;
  375. oldsize = (oldsize + 0xFFF) & ~0xFFF;
  376. newsize = (newsize + 0xFFF) & ~0xFFF;
  377. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  378. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  379. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
  380. tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
  381. if(!tmp)
  382. return NULL;
  383. pico_mmap->buffer = tmp;
  384. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  385. svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
  386. svcCloseHandle(currentHandle);
  387. return ptr;
  388. }
  389. }
  390. }
  391. return realloc(ptr, newsize);
  392. }
  393. void plat_munmap(void *ptr, size_t size)
  394. {
  395. if (ctr_svchack_successful)
  396. {
  397. pico_mmap_t* pico_mmap;
  398. for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
  399. {
  400. if ((pico_mmap->requested_map == (unsigned int)ptr))
  401. {
  402. unsigned int ptr_aligned;
  403. unsigned int currentHandle;
  404. size = (size + 0xFFF) & ~0xFFF;
  405. ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
  406. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  407. svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
  408. svcCloseHandle(currentHandle);
  409. free(pico_mmap->buffer);
  410. pico_mmap->buffer = NULL;
  411. return;
  412. }
  413. }
  414. }
  415. free(ptr);
  416. }
  417. #else
  418. void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
  419. {
  420. int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  421. void *req, *ret;
  422. req = (void *)(uintptr_t)addr;
  423. ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  424. if (ret == MAP_FAILED) {
  425. if (log_cb)
  426. log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
  427. return NULL;
  428. }
  429. if (addr != 0 && ret != (void *)(uintptr_t)addr) {
  430. if (log_cb)
  431. log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
  432. addr, ret);
  433. if (is_fixed) {
  434. munmap(ret, size);
  435. return NULL;
  436. }
  437. }
  438. return ret;
  439. }
  440. void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
  441. {
  442. #if defined(__linux__) && !defined(__SWITCH__)
  443. void *ret = mremap(ptr, oldsize, newsize, 0);
  444. if (ret == MAP_FAILED)
  445. return NULL;
  446. return ret;
  447. #else
  448. void *tmp, *ret;
  449. size_t preserve_size;
  450. preserve_size = oldsize;
  451. if (preserve_size > newsize)
  452. preserve_size = newsize;
  453. tmp = malloc(preserve_size);
  454. if (tmp == NULL)
  455. return NULL;
  456. memcpy(tmp, ptr, preserve_size);
  457. munmap(ptr, oldsize);
  458. ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
  459. MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  460. if (ret == MAP_FAILED) {
  461. free(tmp);
  462. return NULL;
  463. }
  464. memcpy(ret, tmp, preserve_size);
  465. free(tmp);
  466. return ret;
  467. #endif
  468. }
  469. void plat_munmap(void *ptr, size_t size)
  470. {
  471. if (ptr != NULL)
  472. munmap(ptr, size);
  473. }
  474. #endif
  475. // if NULL is returned, static buffer is used
  476. void *plat_mem_get_for_drc(size_t size)
  477. {
  478. void *mem = NULL;
  479. #ifdef VITA
  480. sceKernelGetMemBlockBase(sceBlock, &mem);
  481. #endif
  482. return mem;
  483. }
  484. int plat_mem_set_exec(void *ptr, size_t size)
  485. {
  486. int ret = -1;
  487. #ifdef _WIN32
  488. DWORD oldProtect = 0;
  489. ret = VirtualProtect(ptr, size, PAGE_EXECUTE_READWRITE, &oldProtect);
  490. if (ret == 0 && log_cb)
  491. log_cb(RETRO_LOG_ERROR, "VirtualProtect(%p, %d) failed: %d\n", ptr, (int)size,
  492. GetLastError());
  493. #elif defined(_3DS)
  494. if (ctr_svchack_successful)
  495. {
  496. unsigned int currentHandle;
  497. svcDuplicateHandle(&currentHandle, 0xFFFF8001);
  498. ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
  499. size, MEMOP_PROT, 0b111);
  500. svcCloseHandle(currentHandle);
  501. ctr_flush_invalidate_cache();
  502. }
  503. else
  504. {
  505. if (log_cb)
  506. log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
  507. exit(1);
  508. }
  509. #elif defined(VITA)
  510. ret = sceKernelOpenVMDomain();
  511. #else
  512. ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
  513. if (ret != 0 && log_cb)
  514. log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
  515. #endif
  516. return ret;
  517. }
  518. void emu_video_mode_change(int start_line, int line_count, int is_32cols)
  519. {
  520. struct retro_system_av_info av_info;
  521. vm_current_start_line = start_line;
  522. vm_current_line_count = line_count;
  523. vm_current_is_32cols = is_32cols;
  524. // 8bit renderes create a 328x256 CLUT image, while 16bit creates 320x240 RGB
  525. vout_16bit = vout_format == PDF_RGB555 || (PicoIn.AHW & PAHW_32X);
  526. #if defined(RENDER_GSKIT_PS2)
  527. // calculate the borders of the real image inside the picodrive image
  528. vout_width = (vout_16bit ? VOUT_MAX_WIDTH : VOUT_8BIT_WIDTH);
  529. vout_height = (vout_16bit ? VOUT_MAX_HEIGHT : VOUT_8BIT_HEIGHT);
  530. vout_offset = (vout_16bit ? 0 : 8); // 8bit has 8 px overlap area on the left
  531. if (is_32cols) {
  532. // 256x240, with or w/o overlap on the left and 64 px on the right
  533. padding = (struct retro_hw_ps2_insets){start_line, vout_offset, vout_height - line_count - start_line, vout_width - 256.0f - vout_offset};
  534. } else {
  535. // 320x240, with or w/o overlap on the left and none on the right
  536. padding = (struct retro_hw_ps2_insets){start_line, vout_offset, vout_height - line_count - start_line, vout_width - 320.0f - vout_offset};
  537. }
  538. int pxsz = (vout_16bit ? 2 : 1); // pixel size: RGB = 16 bits, CLUT = 8 bits
  539. memset(vout_buf, 0, pxsz * vout_width * vout_height);
  540. memset(retro_palette, 0, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
  541. PicoDrawSetOutBuf(vout_buf, pxsz * vout_width);
  542. if (ps2) {
  543. // prepare image as texture for rendering
  544. ps2->coreTexture->Width = vout_width;
  545. ps2->coreTexture->Height = vout_height;
  546. ps2->coreTexture->PSM = (vout_16bit ? GS_PSM_CT16 : GS_PSM_T8);
  547. ps2->padding = padding;
  548. }
  549. #else
  550. vout_width = is_32cols ? VOUT_32COL_WIDTH : VOUT_MAX_WIDTH;
  551. memset(vout_buf, 0, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  552. if (vout_16bit)
  553. PicoDrawSetOutBuf(vout_buf, vout_width * 2);
  554. if (show_overscan)
  555. {
  556. vout_height = line_count + (start_line * 2);
  557. vout_offset = 0;
  558. }
  559. else
  560. {
  561. vout_height = line_count;
  562. /* Note: We multiply by 2 here to account for pitch */
  563. vout_offset = vout_width * start_line * 2;
  564. }
  565. /* Redundant sanity check... */
  566. vout_height = (vout_height > VOUT_MAX_HEIGHT) ?
  567. VOUT_MAX_HEIGHT : vout_height;
  568. vout_offset = (vout_offset > vout_width * (VOUT_MAX_HEIGHT - 1) * 2) ?
  569. vout_width * (VOUT_MAX_HEIGHT - 1) * 2 : vout_offset;
  570. #endif
  571. Pico.m.dirtyPal = 1;
  572. // Update the geometry
  573. retro_get_system_av_info(&av_info);
  574. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  575. }
  576. void emu_32x_startup(void)
  577. {
  578. PicoDrawSetOutFormat(vout_format, 0);
  579. if ((vm_current_start_line != -1) &&
  580. (vm_current_line_count != -1) &&
  581. (vm_current_is_32cols != -1))
  582. emu_video_mode_change(
  583. vm_current_start_line,
  584. vm_current_line_count,
  585. vm_current_is_32cols);
  586. }
  587. void lprintf(const char *fmt, ...)
  588. {
  589. char buffer[256];
  590. va_list ap;
  591. va_start(ap, fmt);
  592. vsprintf(buffer, fmt, ap);
  593. /* TODO - add 'level' param for warning/error messages? */
  594. if (log_cb)
  595. log_cb(RETRO_LOG_INFO, "%s", buffer);
  596. va_end(ap);
  597. }
  598. /* libretro */
  599. void retro_set_environment(retro_environment_t cb)
  600. {
  601. #ifdef USE_LIBRETRO_VFS
  602. struct retro_vfs_interface_info vfs_iface_info;
  603. #endif
  604. environ_cb = cb;
  605. libretro_set_core_options(environ_cb);
  606. #ifdef USE_LIBRETRO_VFS
  607. vfs_iface_info.required_interface_version = 1;
  608. vfs_iface_info.iface = NULL;
  609. if (environ_cb(RETRO_ENVIRONMENT_GET_VFS_INTERFACE, &vfs_iface_info))
  610. filestream_vfs_init(&vfs_iface_info);
  611. #endif
  612. }
  613. void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
  614. void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
  615. void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
  616. void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
  617. void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
  618. unsigned retro_api_version(void)
  619. {
  620. return RETRO_API_VERSION;
  621. }
  622. void retro_set_controller_port_device(unsigned port, unsigned device)
  623. {
  624. }
  625. void retro_get_system_info(struct retro_system_info *info)
  626. {
  627. memset(info, 0, sizeof(*info));
  628. info->library_name = "PicoDrive";
  629. #ifndef GIT_VERSION
  630. #define _GIT_VERSION ""
  631. #else
  632. #define _GIT_VERSION "-" GIT_VERSION
  633. #endif
  634. info->library_version = VERSION _GIT_VERSION;
  635. info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
  636. info->need_fullpath = true;
  637. }
  638. void retro_get_system_av_info(struct retro_system_av_info *info)
  639. {
  640. float common_width;
  641. memset(info, 0, sizeof(*info));
  642. info->timing.fps = Pico.m.pal ? 50 : 60;
  643. info->timing.sample_rate = PicoIn.sndRate;
  644. info->geometry.base_width = vout_width;
  645. info->geometry.base_height = vout_height;
  646. info->geometry.max_width = vout_width;
  647. info->geometry.max_height = vout_height;
  648. common_width = vout_width;
  649. if (user_vout_width != 0)
  650. common_width = user_vout_width;
  651. info->geometry.aspect_ratio = common_width / vout_height;
  652. }
  653. /* savestates */
  654. struct savestate_state {
  655. const char *load_buf;
  656. char *save_buf;
  657. size_t size;
  658. size_t pos;
  659. };
  660. size_t state_read(void *p, size_t size, size_t nmemb, void *file)
  661. {
  662. struct savestate_state *state = file;
  663. size_t bsize = size * nmemb;
  664. if (state->pos + bsize > state->size) {
  665. if (log_cb)
  666. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  667. state->pos + bsize, state->size);
  668. bsize = state->size - state->pos;
  669. if ((int)bsize <= 0)
  670. return 0;
  671. }
  672. memcpy(p, state->load_buf + state->pos, bsize);
  673. state->pos += bsize;
  674. return bsize;
  675. }
  676. size_t state_write(void *p, size_t size, size_t nmemb, void *file)
  677. {
  678. struct savestate_state *state = file;
  679. size_t bsize = size * nmemb;
  680. if (state->pos + bsize > state->size) {
  681. if (log_cb)
  682. log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
  683. state->pos + bsize, state->size);
  684. bsize = state->size - state->pos;
  685. if ((int)bsize <= 0)
  686. return 0;
  687. }
  688. memcpy(state->save_buf + state->pos, p, bsize);
  689. state->pos += bsize;
  690. return bsize;
  691. }
  692. size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
  693. {
  694. struct savestate_state *state = file;
  695. size_t bsize = size * nmemb;
  696. state->pos += bsize;
  697. return bsize;
  698. }
  699. size_t state_eof(void *file)
  700. {
  701. struct savestate_state *state = file;
  702. return state->pos >= state->size;
  703. }
  704. int state_fseek(void *file, long offset, int whence)
  705. {
  706. struct savestate_state *state = file;
  707. switch (whence) {
  708. case SEEK_SET:
  709. state->pos = offset;
  710. break;
  711. case SEEK_CUR:
  712. state->pos += offset;
  713. break;
  714. case SEEK_END:
  715. state->pos = state->size + offset;
  716. break;
  717. }
  718. return (int)state->pos;
  719. }
  720. /* savestate sizes vary wildly depending if cd/32x or
  721. * carthw is active, so run the whole thing to get size */
  722. size_t retro_serialize_size(void)
  723. {
  724. struct savestate_state state = { 0, };
  725. int ret;
  726. ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
  727. if (ret != 0)
  728. return 0;
  729. return state.pos;
  730. }
  731. bool retro_serialize(void *data, size_t size)
  732. {
  733. struct savestate_state state = { 0, };
  734. int ret;
  735. state.save_buf = data;
  736. state.size = size;
  737. state.pos = 0;
  738. ret = PicoStateFP(&state, 1, NULL, state_write,
  739. NULL, state_fseek);
  740. return ret == 0;
  741. }
  742. bool retro_unserialize(const void *data, size_t size)
  743. {
  744. struct savestate_state state = { 0, };
  745. int ret;
  746. state.load_buf = data;
  747. state.size = size;
  748. state.pos = 0;
  749. ret = PicoStateFP(&state, 0, state_read, NULL,
  750. state_eof, state_fseek);
  751. return ret == 0;
  752. }
  753. typedef struct patch
  754. {
  755. unsigned int addr;
  756. unsigned short data;
  757. unsigned char comp;
  758. } patch;
  759. extern void decode(char *buff, patch *dest);
  760. extern uint16_t m68k_read16(uint32_t a);
  761. extern void m68k_write16(uint32_t a, uint16_t d);
  762. void retro_cheat_reset(void)
  763. {
  764. int i=0;
  765. unsigned int addr;
  766. for (i = 0; i < PicoPatchCount; i++)
  767. {
  768. addr = PicoPatches[i].addr;
  769. if (addr < Pico.romsize) {
  770. if (PicoPatches[i].active)
  771. *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
  772. } else {
  773. if (PicoPatches[i].active)
  774. m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
  775. }
  776. }
  777. PicoPatchUnload();
  778. }
  779. void retro_cheat_set(unsigned index, bool enabled, const char *code)
  780. {
  781. patch pt;
  782. int array_len = PicoPatchCount;
  783. char codeCopy[256];
  784. char *buff;
  785. if (*code == '\0')
  786. return;
  787. strcpy(codeCopy, code);
  788. buff = strtok(codeCopy,"+");
  789. while (buff != NULL)
  790. {
  791. decode(buff, &pt);
  792. if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
  793. {
  794. log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
  795. return;
  796. }
  797. /* code was good, add it */
  798. if (array_len < PicoPatchCount + 1)
  799. {
  800. void *ptr;
  801. array_len *= 2;
  802. array_len++;
  803. ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
  804. if (ptr == NULL) {
  805. log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
  806. return;
  807. }
  808. PicoPatches = ptr;
  809. }
  810. strcpy(PicoPatches[PicoPatchCount].code, buff);
  811. PicoPatches[PicoPatchCount].active = enabled;
  812. PicoPatches[PicoPatchCount].addr = pt.addr;
  813. PicoPatches[PicoPatchCount].data = pt.data;
  814. PicoPatches[PicoPatchCount].comp = pt.comp;
  815. if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
  816. PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
  817. else
  818. PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
  819. PicoPatchCount++;
  820. buff = strtok(NULL,"+");
  821. }
  822. }
  823. /* multidisk support */
  824. static bool disk_ejected;
  825. static unsigned int disk_current_index;
  826. static unsigned int disk_count;
  827. static struct disks_state {
  828. char *fname;
  829. } disks[8];
  830. static bool disk_set_eject_state(bool ejected)
  831. {
  832. // TODO?
  833. disk_ejected = ejected;
  834. return true;
  835. }
  836. static bool disk_get_eject_state(void)
  837. {
  838. return disk_ejected;
  839. }
  840. static unsigned int disk_get_image_index(void)
  841. {
  842. return disk_current_index;
  843. }
  844. static bool disk_set_image_index(unsigned int index)
  845. {
  846. enum cd_img_type cd_type;
  847. int ret;
  848. if (index >= sizeof(disks) / sizeof(disks[0]))
  849. return false;
  850. if (disks[index].fname == NULL) {
  851. if (log_cb)
  852. log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
  853. // RetroArch specifies "no disk" with index == count,
  854. // so don't fail here..
  855. disk_current_index = index;
  856. return true;
  857. }
  858. if (log_cb)
  859. log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
  860. disks[index].fname);
  861. ret = -1;
  862. cd_type = PicoCdCheck(disks[index].fname, NULL);
  863. if (cd_type != CIT_NOT_CD)
  864. ret = cdd_load(disks[index].fname, cd_type);
  865. if (ret != 0) {
  866. if (log_cb)
  867. log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
  868. return 0;
  869. }
  870. disk_current_index = index;
  871. return true;
  872. }
  873. static unsigned int disk_get_num_images(void)
  874. {
  875. return disk_count;
  876. }
  877. static bool disk_replace_image_index(unsigned index,
  878. const struct retro_game_info *info)
  879. {
  880. bool ret = true;
  881. if (index >= sizeof(disks) / sizeof(disks[0]))
  882. return false;
  883. if (disks[index].fname != NULL)
  884. free(disks[index].fname);
  885. disks[index].fname = NULL;
  886. if (info != NULL) {
  887. disks[index].fname = strdup(info->path);
  888. if (index == disk_current_index)
  889. ret = disk_set_image_index(index);
  890. }
  891. return ret;
  892. }
  893. static bool disk_add_image_index(void)
  894. {
  895. if (disk_count >= sizeof(disks) / sizeof(disks[0]))
  896. return false;
  897. disk_count++;
  898. return true;
  899. }
  900. static struct retro_disk_control_callback disk_control = {
  901. disk_set_eject_state,
  902. disk_get_eject_state,
  903. disk_get_image_index,
  904. disk_set_image_index,
  905. disk_get_num_images,
  906. disk_replace_image_index,
  907. disk_add_image_index,
  908. };
  909. static void disk_tray_open(void)
  910. {
  911. if (log_cb)
  912. log_cb(RETRO_LOG_INFO, "cd tray open\n");
  913. disk_ejected = 1;
  914. }
  915. static void disk_tray_close(void)
  916. {
  917. if (log_cb)
  918. log_cb(RETRO_LOG_INFO, "cd tray close\n");
  919. disk_ejected = 0;
  920. }
  921. static const char * const biosfiles_us[] = {
  922. "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
  923. };
  924. static const char * const biosfiles_eu[] = {
  925. "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
  926. };
  927. static const char * const biosfiles_jp[] = {
  928. "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
  929. };
  930. static void make_system_path(char *buf, size_t buf_size,
  931. const char *name, const char *ext)
  932. {
  933. const char *dir = NULL;
  934. if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
  935. snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
  936. }
  937. else {
  938. snprintf(buf, buf_size, "%s%s", name, ext);
  939. }
  940. }
  941. static const char *find_bios(int *region, const char *cd_fname)
  942. {
  943. const char * const *files;
  944. static char path[256];
  945. int i, count;
  946. FILE *f = NULL;
  947. if (*region == 4) { // US
  948. files = biosfiles_us;
  949. count = sizeof(biosfiles_us) / sizeof(char *);
  950. } else if (*region == 8) { // EU
  951. files = biosfiles_eu;
  952. count = sizeof(biosfiles_eu) / sizeof(char *);
  953. } else if (*region == 1 || *region == 2) {
  954. files = biosfiles_jp;
  955. count = sizeof(biosfiles_jp) / sizeof(char *);
  956. } else {
  957. return NULL;
  958. }
  959. for (i = 0; i < count; i++)
  960. {
  961. make_system_path(path, sizeof(path), files[i], ".bin");
  962. f = fopen(path, "rb");
  963. if (f != NULL)
  964. break;
  965. make_system_path(path, sizeof(path), files[i], ".zip");
  966. f = fopen(path, "rb");
  967. if (f != NULL)
  968. break;
  969. }
  970. if (f != NULL) {
  971. if (log_cb)
  972. log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
  973. fclose(f);
  974. return path;
  975. }
  976. return NULL;
  977. }
  978. static void set_memory_maps(void)
  979. {
  980. if (PicoIn.AHW & PAHW_MCD)
  981. {
  982. const size_t SCD_BIT = 1ULL << 31ULL;
  983. const uint64_t mem = RETRO_MEMDESC_SYSTEM_RAM;
  984. struct retro_memory_map mmaps;
  985. struct retro_memory_descriptor descs[] = {
  986. { mem, PicoMem.ram, 0, 0xFF0000, 0, 0, 0x10000, "68KRAM" },
  987. /* virtual address using SCD_BIT so all 512M of prg_ram can be accessed */
  988. /* at address $80020000 */
  989. { mem, Pico_mcd->prg_ram, 0, SCD_BIT | 0x020000, 0, 0, 0x80000, "PRGRAM" },
  990. };
  991. mmaps.descriptors = descs;
  992. mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
  993. environ_cb(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
  994. }
  995. }
  996. bool retro_load_game(const struct retro_game_info *info)
  997. {
  998. enum media_type_e media_type;
  999. static char carthw_path[256];
  1000. size_t i;
  1001. struct retro_input_descriptor desc[] = {
  1002. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1003. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1004. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1005. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1006. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  1007. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  1008. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  1009. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  1010. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  1011. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  1012. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  1013. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  1014. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1015. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1016. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1017. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1018. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
  1019. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
  1020. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
  1021. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
  1022. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
  1023. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
  1024. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
  1025. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
  1026. { 0 },
  1027. };
  1028. struct retro_input_descriptor desc_sms[] = {
  1029. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1030. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1031. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1032. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1033. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  1034. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  1035. { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  1036. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
  1037. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
  1038. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
  1039. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
  1040. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
  1041. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
  1042. { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
  1043. { 0 },
  1044. };
  1045. enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
  1046. if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
  1047. if (log_cb)
  1048. log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
  1049. return false;
  1050. }
  1051. if (info == NULL || info->path == NULL) {
  1052. if (log_cb)
  1053. log_cb(RETRO_LOG_ERROR, "info->path required\n");
  1054. return false;
  1055. }
  1056. for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
  1057. if (disks[i].fname != NULL) {
  1058. free(disks[i].fname);
  1059. disks[i].fname = NULL;
  1060. }
  1061. }
  1062. disk_current_index = 0;
  1063. disk_count = 1;
  1064. disks[0].fname = strdup(info->path);
  1065. make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
  1066. media_type = PicoLoadMedia(info->path, carthw_path,
  1067. find_bios, NULL);
  1068. switch (media_type) {
  1069. case PM_BAD_DETECT:
  1070. if (log_cb)
  1071. log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
  1072. return false;
  1073. case PM_BAD_CD:
  1074. if (log_cb)
  1075. log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
  1076. return false;
  1077. case PM_BAD_CD_NO_BIOS:
  1078. if (log_cb)
  1079. log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
  1080. return false;
  1081. case PM_ERROR:
  1082. if (log_cb)
  1083. log_cb(RETRO_LOG_ERROR, "Load error\n");
  1084. return false;
  1085. default:
  1086. break;
  1087. }
  1088. if (media_type == PM_MARK3)
  1089. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
  1090. else
  1091. environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
  1092. PicoLoopPrepare();
  1093. PicoIn.writeSound = snd_write;
  1094. memset(sndBuffer, 0, sizeof(sndBuffer));
  1095. PicoIn.sndOut = sndBuffer;
  1096. PsndRerate(0);
  1097. /* Setup retro memory maps */
  1098. set_memory_maps();
  1099. init_frameskip();
  1100. return true;
  1101. }
  1102. bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
  1103. {
  1104. return false;
  1105. }
  1106. void retro_unload_game(void)
  1107. {
  1108. }
  1109. unsigned retro_get_region(void)
  1110. {
  1111. return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
  1112. }
  1113. void *retro_get_memory_data(unsigned type)
  1114. {
  1115. uint8_t* data;
  1116. switch(type)
  1117. {
  1118. case RETRO_MEMORY_SAVE_RAM:
  1119. /* Note: MCD RAM cart uses Pico.sv.data */
  1120. if ((PicoIn.AHW & PAHW_MCD) &&
  1121. !(PicoIn.opt & POPT_EN_MCD_RAMCART))
  1122. data = Pico_mcd->bram;
  1123. else
  1124. data = Pico.sv.data;
  1125. break;
  1126. case RETRO_MEMORY_SYSTEM_RAM:
  1127. if (PicoIn.AHW & PAHW_SMS)
  1128. data = PicoMem.zram;
  1129. else
  1130. data = PicoMem.ram;
  1131. break;
  1132. default:
  1133. data = NULL;
  1134. break;
  1135. }
  1136. return data;
  1137. }
  1138. size_t retro_get_memory_size(unsigned type)
  1139. {
  1140. unsigned int i;
  1141. int sum;
  1142. switch(type)
  1143. {
  1144. case RETRO_MEMORY_SAVE_RAM:
  1145. if (PicoIn.AHW & PAHW_MCD)
  1146. {
  1147. if (PicoIn.opt & POPT_EN_MCD_RAMCART)
  1148. return 0x12000;
  1149. else /* bram */
  1150. return 0x2000;
  1151. }
  1152. if (Pico.m.frame_count == 0)
  1153. return Pico.sv.size;
  1154. // if game doesn't write to sram, don't report it to
  1155. // libretro so that RA doesn't write out zeroed .srm
  1156. for (i = 0, sum = 0; i < Pico.sv.size; i++)
  1157. sum |= Pico.sv.data[i];
  1158. return (sum != 0) ? Pico.sv.size : 0;
  1159. case RETRO_MEMORY_SYSTEM_RAM:
  1160. if (PicoIn.AHW & PAHW_SMS)
  1161. return 0x2000;
  1162. else
  1163. return sizeof(PicoMem.ram);
  1164. default:
  1165. return 0;
  1166. }
  1167. }
  1168. void retro_reset(void)
  1169. {
  1170. PicoReset();
  1171. }
  1172. static const unsigned short retro_pico_map[] = {
  1173. 1 << GBTN_B,
  1174. 1 << GBTN_A,
  1175. 1 << GBTN_MODE,
  1176. 1 << GBTN_START,
  1177. 1 << GBTN_UP,
  1178. 1 << GBTN_DOWN,
  1179. 1 << GBTN_LEFT,
  1180. 1 << GBTN_RIGHT,
  1181. 1 << GBTN_C,
  1182. 1 << GBTN_Y,
  1183. 1 << GBTN_X,
  1184. 1 << GBTN_Z,
  1185. };
  1186. #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
  1187. static void snd_write(int len)
  1188. {
  1189. audio_batch_cb(PicoIn.sndOut, len / 4);
  1190. }
  1191. static enum input_device input_name_to_val(const char *name)
  1192. {
  1193. if (strcmp(name, "3 button pad") == 0)
  1194. return PICO_INPUT_PAD_3BTN;
  1195. if (strcmp(name, "6 button pad") == 0)
  1196. return PICO_INPUT_PAD_6BTN;
  1197. if (strcmp(name, "None") == 0)
  1198. return PICO_INPUT_NOTHING;
  1199. if (log_cb)
  1200. log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
  1201. return PICO_INPUT_PAD_3BTN;
  1202. }
  1203. static void update_variables(bool first_run)
  1204. {
  1205. struct retro_variable var;
  1206. int OldPicoRegionOverride;
  1207. float old_user_vout_width;
  1208. unsigned old_frameskip_type;
  1209. int old_vout_format;
  1210. double new_sound_rate;
  1211. unsigned short old_snd_filter;
  1212. int32_t old_snd_filter_range;
  1213. var.value = NULL;
  1214. var.key = "picodrive_input1";
  1215. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1216. PicoSetInputDevice(0, input_name_to_val(var.value));
  1217. var.value = NULL;
  1218. var.key = "picodrive_input2";
  1219. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1220. PicoSetInputDevice(1, input_name_to_val(var.value));
  1221. var.value = NULL;
  1222. var.key = "picodrive_sprlim";
  1223. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1224. if (strcmp(var.value, "enabled") == 0)
  1225. PicoIn.opt |= POPT_DIS_SPRITE_LIM;
  1226. else
  1227. PicoIn.opt &= ~POPT_DIS_SPRITE_LIM;
  1228. }
  1229. var.value = NULL;
  1230. var.key = "picodrive_ramcart";
  1231. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1232. if (strcmp(var.value, "enabled") == 0)
  1233. PicoIn.opt |= POPT_EN_MCD_RAMCART;
  1234. else
  1235. PicoIn.opt &= ~POPT_EN_MCD_RAMCART;
  1236. }
  1237. OldPicoRegionOverride = PicoIn.regionOverride;
  1238. var.value = NULL;
  1239. var.key = "picodrive_region";
  1240. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1241. if (strcmp(var.value, "Auto") == 0)
  1242. PicoIn.regionOverride = 0;
  1243. else if (strcmp(var.value, "Japan NTSC") == 0)
  1244. PicoIn.regionOverride = 1;
  1245. else if (strcmp(var.value, "Japan PAL") == 0)
  1246. PicoIn.regionOverride = 2;
  1247. else if (strcmp(var.value, "US") == 0)
  1248. PicoIn.regionOverride = 4;
  1249. else if (strcmp(var.value, "Europe") == 0)
  1250. PicoIn.regionOverride = 8;
  1251. }
  1252. // Update region, fps and sound flags if needed
  1253. if (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)
  1254. {
  1255. PicoDetectRegion();
  1256. PicoLoopPrepare();
  1257. PsndRerate(1);
  1258. }
  1259. old_user_vout_width = user_vout_width;
  1260. var.value = NULL;
  1261. var.key = "picodrive_aspect";
  1262. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1263. if (strcmp(var.value, "4/3") == 0)
  1264. user_vout_width = VOUT_4_3;
  1265. else if (strcmp(var.value, "CRT") == 0)
  1266. user_vout_width = VOUT_CRT;
  1267. else
  1268. user_vout_width = VOUT_PAR;
  1269. }
  1270. if (user_vout_width != old_user_vout_width)
  1271. {
  1272. // Update the geometry
  1273. struct retro_system_av_info av_info;
  1274. retro_get_system_av_info(&av_info);
  1275. environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
  1276. }
  1277. old_show_overscan = show_overscan;
  1278. var.value = NULL;
  1279. var.key = "picodrive_overscan";
  1280. show_overscan = false;
  1281. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1282. if (strcmp(var.value, "enabled") == 0)
  1283. show_overscan = true;
  1284. }
  1285. var.value = NULL;
  1286. var.key = "picodrive_overclk68k";
  1287. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1288. PicoIn.overclockM68k = 0;
  1289. if (var.value[0] == '+')
  1290. PicoIn.overclockM68k = atoi(var.value + 1);
  1291. }
  1292. #ifdef DRC_SH2
  1293. var.value = NULL;
  1294. var.key = "picodrive_drc";
  1295. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1296. if (strcmp(var.value, "enabled") == 0)
  1297. PicoIn.opt |= POPT_EN_DRC;
  1298. else
  1299. PicoIn.opt &= ~POPT_EN_DRC;
  1300. }
  1301. #endif
  1302. #ifdef _3DS
  1303. if(!ctr_svchack_successful)
  1304. PicoIn.opt &= ~POPT_EN_DRC;
  1305. #endif
  1306. old_snd_filter = PicoIn.sndFilter;
  1307. var.value = NULL;
  1308. var.key = "picodrive_audio_filter";
  1309. PicoIn.sndFilter = 0;
  1310. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1311. if (strcmp(var.value, "low-pass") == 0)
  1312. PicoIn.sndFilter = 1;
  1313. }
  1314. old_snd_filter_range = PicoIn.sndFilterRange;
  1315. var.value = NULL;
  1316. var.key = "picodrive_lowpass_range";
  1317. PicoIn.sndFilterRange = (60 * 65536) / 100;
  1318. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1319. PicoIn.sndFilterRange = (atoi(var.value) * 65536) / 100;
  1320. }
  1321. if (old_snd_filter != PicoIn.sndFilter || old_snd_filter_range != PicoIn.sndFilterRange) {
  1322. mix_reset(PicoIn.sndFilter ? PicoIn.sndFilterRange : 0);
  1323. }
  1324. old_frameskip_type = frameskip_type;
  1325. frameskip_type = 0;
  1326. var.key = "picodrive_frameskip";
  1327. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1328. if (strcmp(var.value, "auto") == 0)
  1329. frameskip_type = 1;
  1330. else if (strcmp(var.value, "manual") == 0)
  1331. frameskip_type = 2;
  1332. }
  1333. frameskip_threshold = 33;
  1334. var.key = "picodrive_frameskip_threshold";
  1335. var.value = NULL;
  1336. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1337. frameskip_threshold = strtol(var.value, NULL, 10);
  1338. old_vout_format = vout_format;
  1339. var.value = NULL;
  1340. var.key = "picodrive_renderer";
  1341. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1342. if (strcmp(var.value, "fast") == 0)
  1343. vout_format = PDF_NONE;
  1344. else if (strcmp(var.value, "good") == 0)
  1345. vout_format = PDF_8BIT;
  1346. else if (strcmp(var.value, "accurate") == 0)
  1347. vout_format = PDF_RGB555;
  1348. PicoIn.opt &= ~POPT_ALT_RENDERER;
  1349. if (vout_format == PDF_NONE)
  1350. PicoIn.opt |= POPT_ALT_RENDERER;
  1351. PicoDrawSetOutFormat(vout_format, 0);
  1352. }
  1353. var.value = NULL;
  1354. var.key = "picodrive_sound_rate";
  1355. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
  1356. new_sound_rate = atoi(var.value);
  1357. if (new_sound_rate != PicoIn.sndRate) {
  1358. /* Update the sound rate */
  1359. PicoIn.sndRate = new_sound_rate;
  1360. PsndRerate(1);
  1361. struct retro_system_av_info av_info;
  1362. retro_get_system_av_info(&av_info);
  1363. environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &av_info);
  1364. }
  1365. }
  1366. /* setup video if required */
  1367. if (show_overscan != old_show_overscan || vout_format != old_vout_format)
  1368. {
  1369. if ((vm_current_start_line != -1) &&
  1370. (vm_current_line_count != -1) &&
  1371. (vm_current_is_32cols != -1))
  1372. emu_video_mode_change(
  1373. vm_current_start_line,
  1374. vm_current_line_count,
  1375. vm_current_is_32cols);
  1376. }
  1377. /* Reinitialise frameskipping, if required */
  1378. if (((frameskip_type != old_frameskip_type) ||
  1379. (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)) &&
  1380. !first_run)
  1381. init_frameskip();
  1382. }
  1383. void retro_run(void)
  1384. {
  1385. bool updated = false;
  1386. int pad, i;
  1387. static void *buff;
  1388. PicoIn.skipFrame = 0;
  1389. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
  1390. update_variables(false);
  1391. input_poll_cb();
  1392. PicoIn.pad[0] = PicoIn.pad[1] = 0;
  1393. for (pad = 0; pad < 2; pad++)
  1394. for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
  1395. if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
  1396. PicoIn.pad[pad] |= retro_pico_map[i];
  1397. if (PicoPatches)
  1398. PicoPatchApply();
  1399. /* Check whether current frame should
  1400. * be skipped */
  1401. if ((frameskip_type > 0) && retro_audio_buff_active) {
  1402. switch (frameskip_type)
  1403. {
  1404. case 1: /* auto */
  1405. PicoIn.skipFrame = retro_audio_buff_underrun ? 1 : 0;
  1406. break;
  1407. case 2: /* manual */
  1408. PicoIn.skipFrame = (retro_audio_buff_occupancy < frameskip_threshold) ? 1 : 0;
  1409. break;
  1410. default:
  1411. PicoIn.skipFrame = 0;
  1412. break;
  1413. }
  1414. if (!PicoIn.skipFrame || (frameskip_counter >= FRAMESKIP_MAX)) {
  1415. PicoIn.skipFrame = 0;
  1416. frameskip_counter = 0;
  1417. } else
  1418. frameskip_counter++;
  1419. }
  1420. /* If frameskip settings have changed, update
  1421. * frontend audio latency */
  1422. if (update_audio_latency) {
  1423. environ_cb(RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY,
  1424. &audio_latency);
  1425. update_audio_latency = false;
  1426. }
  1427. PicoFrame();
  1428. /* If frame was skipped, call video_cb() with
  1429. * a NULL buffer and return immediately */
  1430. if (PicoIn.skipFrame) {
  1431. video_cb(NULL, vout_width, vout_height, vout_width * 2);
  1432. return;
  1433. }
  1434. #if defined(RENDER_GSKIT_PS2)
  1435. buff = (uint32_t *)RETRO_HW_FRAME_BUFFER_VALID;
  1436. if (!ps2) {
  1437. // get access to the graphics hardware
  1438. if (!environ_cb(RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE, (void **)&ps2) || !ps2) {
  1439. printf("Failed to get HW rendering interface!\n");
  1440. return;
  1441. }
  1442. if (ps2->interface_version != RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION) {
  1443. printf("HW render interface mismatch, expected %u, got %u!\n",
  1444. RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION, ps2->interface_version);
  1445. return;
  1446. }
  1447. ps2->coreTexture->ClutPSM = GS_PSM_CT16;
  1448. ps2->coreTexture->Filter = GS_FILTER_LINEAR;
  1449. ps2->coreTexture->Clut = retro_palette;
  1450. ps2->coreTexture->Mem = vout_buf;
  1451. ps2->coreTexture->Width = vout_width;
  1452. ps2->coreTexture->Height = vout_height;
  1453. ps2->coreTexture->PSM = (vout_16bit ? GS_PSM_CT16 : GS_PSM_T8);
  1454. ps2->padding = padding;
  1455. }
  1456. // CLUT update needed?
  1457. if (!vout_16bit && Pico.m.dirtyPal) {
  1458. PicoDrawUpdateHighPal();
  1459. // Rotate CLUT. PS2 is special since entries in CLUT are not in sequence.
  1460. unsigned short int *pal=(void *)retro_palette;
  1461. for (i = 0; i < 256; i+=8) {
  1462. if ((i&0x18) == 0x08)
  1463. memcpy(pal+i,Pico.est.HighPal+i+8,16);
  1464. else if ((i&0x18) == 0x10)
  1465. memcpy(pal+i,Pico.est.HighPal+i-8,16);
  1466. else
  1467. memcpy(pal+i,Pico.est.HighPal+i,16);
  1468. }
  1469. }
  1470. #else
  1471. if (!vout_16bit) {
  1472. /* The 8 bit renderers write a CLUT image in Pico.est.Draw2FB, while libretro wants RGB in vout_buf.
  1473. * We need to manually copy that to vout_buf, applying the CLUT on the way. Especially
  1474. * with the fast renderer this is improving performance, at the expense of accuracy.
  1475. */
  1476. /* This section is mostly copied from pemu_finalize_frame in platform/linux/emu.c */
  1477. unsigned short *pd = (unsigned short *)vout_buf;
  1478. /* Skip the leftmost 8 columns (it is used as an overlap area for rendering) */
  1479. unsigned char *ps = Pico.est.Draw2FB + 8;
  1480. unsigned short *pal = Pico.est.HighPal;
  1481. int x;
  1482. if (Pico.m.dirtyPal)
  1483. PicoDrawUpdateHighPal();
  1484. /* Copy up to the max height to include the overscan area, and skip the leftmost 8 columns again */
  1485. for (i = 0; i < VOUT_MAX_HEIGHT; i++, ps += 8) {
  1486. for (x = 0; x < vout_width; x+=4) {
  1487. *pd++ = pal[*ps++];
  1488. *pd++ = pal[*ps++];
  1489. *pd++ = pal[*ps++];
  1490. *pd++ = pal[*ps++];
  1491. }
  1492. ps += 320-vout_width; /* Advance to next line in case of 32col mode */
  1493. }
  1494. }
  1495. buff = (char*)vout_buf + vout_offset;
  1496. #endif
  1497. video_cb((short *)buff,
  1498. vout_width, vout_height, vout_width * 2);
  1499. }
  1500. void retro_init(void)
  1501. {
  1502. struct retro_log_callback log;
  1503. int level;
  1504. level = 0;
  1505. environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
  1506. if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
  1507. log_cb = log.log;
  1508. else
  1509. log_cb = NULL;
  1510. environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
  1511. #ifdef _3DS
  1512. ctr_svchack_successful = ctr_svchack_init();
  1513. check_rosalina();
  1514. #elif defined(VITA)
  1515. sceBlock = getVMBlock();
  1516. #endif
  1517. PicoIn.opt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80|POPT_EN_YM2413
  1518. | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
  1519. | POPT_EN_32X|POPT_EN_PWM
  1520. | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
  1521. #ifdef __arm__
  1522. #ifdef _3DS
  1523. if (ctr_svchack_successful)
  1524. #endif
  1525. PicoIn.opt |= POPT_EN_DRC;
  1526. #endif
  1527. struct retro_variable var = { .key = "picodrive_sound_rate" };
  1528. if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
  1529. PicoIn.sndRate = atoi(var.value);
  1530. else
  1531. PicoIn.sndRate = INITIAL_SND_RATE;
  1532. PicoIn.autoRgnOrder = 0x184; // US, EU, JP
  1533. vout_width = VOUT_MAX_WIDTH;
  1534. vout_height = VOUT_MAX_HEIGHT;
  1535. #ifdef _3DS
  1536. vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
  1537. #elif defined(RENDER_GSKIT_PS2)
  1538. vout_buf = memalign(4096, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  1539. retro_palette = memalign(128, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
  1540. #else
  1541. vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
  1542. #endif
  1543. PicoInit();
  1544. //PicoIn.osdMessage = plat_status_msg_busy_next;
  1545. PicoIn.mcdTrayOpen = disk_tray_open;
  1546. PicoIn.mcdTrayClose = disk_tray_close;
  1547. frameskip_type = 0;
  1548. frameskip_threshold = 0;
  1549. frameskip_counter = 0;
  1550. retro_audio_buff_active = false;
  1551. retro_audio_buff_occupancy = 0;
  1552. retro_audio_buff_underrun = false;
  1553. audio_latency = 0;
  1554. update_audio_latency = false;
  1555. update_variables(true);
  1556. }
  1557. void retro_deinit(void)
  1558. {
  1559. #ifdef _3DS
  1560. linearFree(vout_buf);
  1561. #elif defined(RENDER_GSKIT_PS2)
  1562. free(vout_buf);
  1563. free(retro_palette);
  1564. ps2 = NULL;
  1565. #else
  1566. free(vout_buf);
  1567. #endif
  1568. vout_buf = NULL;
  1569. PicoExit();
  1570. }