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Fix variable types, silence warnings.
[picodrive.git] / platform / libretro / libretro.c
CommitLineData
2446536b 1/*
2 * libretro core glue for PicoDrive
3 * (C) notaz, 2013
0d87bd6a 4 * (C) aliaspider, 2016
e8454cb0 5 * (C) Daniel De Matteis, 2013
2446536b 6 *
7 * This work is licensed under the terms of MAME license.
8 * See COPYING file in the top-level directory.
9 */
10
11#define _GNU_SOURCE 1 // mremap
12#include <stdio.h>
13#include <stdarg.h>
14#include <string.h>
e8b61936 15#ifndef _WIN32
f18d0e08 16#ifndef NO_MMAP
2446536b 17#include <sys/mman.h>
f18d0e08 18#endif
e8b61936 19#else
6f1133bc 20#include <io.h>
e8b61936 21#include <windows.h>
6f1133bc 22#include <sys/types.h>
e8b61936 23#endif
c25d78ee 24#include <errno.h>
2446536b 25#ifdef __MACH__
26#include <libkern/OSCacheControl.h>
27#endif
28
0c732676 29#ifdef _3DS
30#include "3ds/3ds_utils.h"
ad2ccfbc 31#define MEMOP_MAP 4
32#define MEMOP_UNMAP 5
33#define MEMOP_PROT 6
34
0c732676 35int svcDuplicateHandle(unsigned int* out, unsigned int original);
36int svcCloseHandle(unsigned int handle);
37int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
38 unsigned int size, unsigned int type, unsigned int perm);
ad2ccfbc 39void* linearMemAlign(size_t size, size_t alignment);
40void linearFree(void* mem);
0c732676 41
42static int ctr_svchack_successful = 0;
88f7643f 43
44#elif defined(VITA)
45#define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
46
47#include <psp2/kernel/sysmem.h>
48static int sceBlock;
49int getVMBlock();
50int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
51
0c732676 52#endif
53
2446536b 54#include <pico/pico_int.h>
86b38dc4 55#include <pico/state.h>
20563b60 56#include <pico/patch.h>
5345c2b9
T		 57#include "../common/input_pico.h"
58#include "../common/version.h"
2446536b 59#include "libretro.h"
60
f5d4045b 61static retro_log_printf_t log_cb;
2446536b 62static retro_video_refresh_t video_cb;
63static retro_input_poll_t input_poll_cb;
64static retro_input_state_t input_state_cb;
65static retro_environment_t environ_cb;
66static retro_audio_sample_batch_t audio_batch_cb;
67
2446536b 68#define VOUT_MAX_WIDTH 320
69#define VOUT_MAX_HEIGHT 240
e1360c66
D		 70
71static const float VOUT_PAR = 0.0;
72static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
73static const float VOUT_CRT = (224.0f * 1.29911f);
74
f0a3d0dc 75bool show_overscan = false;
76
2446536b 77static void *vout_buf;
51c08950 78static int vout_width, vout_height, vout_offset;
e1360c66 79static float user_vout_width = 0.0;
2446536b 80
ed06ffd3
T		 81#ifdef _MSC_VER
82static short sndBuffer[2*44100/50];
83#else
2446536b 84static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
ed06ffd3 85#endif
2446536b 86
2446536b 87static void snd_write(int len);
88
89#ifdef _WIN32
90#define SLASH '\\'
91#else
92#define SLASH '/'
93#endif
94
95/* functions called by the core */
96
97void cache_flush_d_inval_i(void *start, void *end)
98{
99#ifdef __arm__
88f7643f 100 size_t len = (char *)end - (char *)start;
2446536b 101#if defined(__BLACKBERRY_QNX__)
eac0e638 102 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
2446536b 103#elif defined(__MACH__)
eac0e638 104 sys_dcache_flush(start, len);
105 sys_icache_invalidate(start, len);
0c732676 106#elif defined(_3DS)
107 ctr_flush_invalidate_cache();
88f7643f 108#elif defined(VITA)
109 sceKernelSyncVMDomain(sceBlock, start, len);
2446536b 110#else
0c732676 111 __clear_cache(start, end);
2446536b 112#endif
113#endif
114}
115
e8b61936 116#ifdef _WIN32
6f1133bc
T		 117/* mmap() replacement for Windows
118 *
119 * Author: Mike Frysinger <vapier@gentoo.org>
120 * Placed into the public domain
121 */
122
123/* References:
124 * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
125 * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
126 * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
127 * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
128 */
129
130#define PROT_READ 0x1
131#define PROT_WRITE 0x2
132/* This flag is only available in WinXP+ */
133#ifdef FILE_MAP_EXECUTE
134#define PROT_EXEC 0x4
135#else
136#define PROT_EXEC 0x0
137#define FILE_MAP_EXECUTE 0
138#endif
139
140#define MAP_SHARED 0x01
141#define MAP_PRIVATE 0x02
142#define MAP_ANONYMOUS 0x20
143#define MAP_ANON MAP_ANONYMOUS
144#define MAP_FAILED ((void *) -1)
145
146#ifdef __USE_FILE_OFFSET64
147# define DWORD_HI(x) (x >> 32)
148# define DWORD_LO(x) ((x) & 0xffffffff)
149#else
150# define DWORD_HI(x) (0)
151# define DWORD_LO(x) (x)
152#endif
153
154static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
2446536b 155{
eac0e638 156 uint32_t flProtect, dwDesiredAccess;
157 off_t end;
158 HANDLE mmap_fd, h;
159 void *ret;
160
161 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
162 return MAP_FAILED;
163 if (fd == -1) {
164 if (!(flags & MAP_ANON) || offset)
165 return MAP_FAILED;
166 } else if (flags & MAP_ANON)
167 return MAP_FAILED;
168
169 if (prot & PROT_WRITE) {
170 if (prot & PROT_EXEC)
171 flProtect = PAGE_EXECUTE_READWRITE;
172 else
173 flProtect = PAGE_READWRITE;
174 } else if (prot & PROT_EXEC) {
175 if (prot & PROT_READ)
176 flProtect = PAGE_EXECUTE_READ;
177 else if (prot & PROT_EXEC)
178 flProtect = PAGE_EXECUTE;
179 } else
180 flProtect = PAGE_READONLY;
181
182 end = length + offset;
183
184 if (fd == -1)
185 mmap_fd = INVALID_HANDLE_VALUE;
186 else
187 mmap_fd = (HANDLE)_get_osfhandle(fd);
188 h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
189 if (h == NULL)
190 return MAP_FAILED;
191
192 if (prot & PROT_WRITE)
193 dwDesiredAccess = FILE_MAP_WRITE;
194 else
195 dwDesiredAccess = FILE_MAP_READ;
196 if (prot & PROT_EXEC)
197 dwDesiredAccess |= FILE_MAP_EXECUTE;
198 if (flags & MAP_PRIVATE)
199 dwDesiredAccess |= FILE_MAP_COPY;
200 ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
201 if (ret == NULL) {
202 CloseHandle(h);
203 ret = MAP_FAILED;
204 }
205 return ret;
e8b61936 206}
2446536b 207
6f1133bc 208static void munmap(void *addr, size_t length)
e8b61936 209{
eac0e638 210 UnmapViewOfFile(addr);
211 /* ruh-ro, we leaked handle from CreateFileMapping() ... */
e8b61936 212}
f18d0e08 213#elif defined(NO_MMAP)
5345c2b9 214#define PROT_EXEC 0x04
f18d0e08 215#define MAP_FAILED 0
216#define PROT_READ 0
217#define PROT_WRITE 0
218#define MAP_PRIVATE 0
219#define MAP_ANONYMOUS 0
220
221void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
222{
223 return malloc(len);
224}
225
226void munmap(void *base_addr, size_t len)
227{
228 free(base_addr);
229}
230
231int mprotect(void *addr, size_t len, int prot)
232{
eac0e638 233 /* stub - not really needed at this point since this codepath has no dynarecs */
f18d0e08 234 return 0;
235}
236
e8b61936 237#endif
8e5639bc 238
239#ifndef MAP_ANONYMOUS
240#define MAP_ANONYMOUS MAP_ANON
241#endif
242
0c732676 243#ifdef _3DS
244typedef struct
245{
246 unsigned int requested_map;
247 void* buffer;
248}pico_mmap_t;
249
250pico_mmap_t pico_mmaps[] = {
251 {0x02000000, 0},
252 {0x06000000, 0},
253 {NULL, 0}
254};
255
256void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
257{
258 (void)is_fixed;
259
260 if (ctr_svchack_successful)
261 {
262 pico_mmap_t* pico_mmap;
263
264 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
265 {
266 if ((pico_mmap->requested_map == addr))
267 {
268 unsigned int ptr_aligned, tmp;
269 unsigned int currentHandle;
270 unsigned int perm = 0b011;
271
272 if (need_exec)
273 perm = 0b111;
274
275 size = (size + 0xFFF) & ~0xFFF;
276 pico_mmap->buffer = malloc(size + 0x1000);
277 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
278
279 svcDuplicateHandle(&currentHandle, 0xFFFF8001);
280
281 if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
282 {
283 if (log_cb)
284 log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
285 exit(1);
286 }
287
288 svcCloseHandle(currentHandle);
289 return (void*)pico_mmap->requested_map;
290 }
291 }
292 }
293
294 return malloc(size);
295}
296
297void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
298{
299 if (ctr_svchack_successful)
300 {
301 pico_mmap_t* pico_mmap;
302
303 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
304 {
305 if ((pico_mmap->requested_map == (unsigned int)ptr))
306 {
307 unsigned int ptr_aligned;
308 unsigned int currentHandle;
309 void* tmp;
310
311 oldsize = (oldsize + 0xFFF) & ~0xFFF;
312 newsize = (newsize + 0xFFF) & ~0xFFF;
313 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
314
315 svcDuplicateHandle(&currentHandle, 0xFFFF8001);
316
317 svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
318
319 tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
320 if(!tmp)
321 return NULL;
322
323 pico_mmap->buffer = tmp;
324 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
325
326 svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
327
328 svcCloseHandle(currentHandle);
329
330 return ptr;
331 }
332 }
333 }
334
335 return realloc(ptr, newsize);
336
337}
338void plat_munmap(void *ptr, size_t size)
339{
340 if (ctr_svchack_successful)
341 {
342 pico_mmap_t* pico_mmap;
343
344 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
345 {
346 if ((pico_mmap->requested_map == (unsigned int)ptr))
347 {
348 unsigned int ptr_aligned;
349 unsigned int currentHandle;
350
351 size = (size + 0xFFF) & ~0xFFF;
352 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
353
354 svcDuplicateHandle(&currentHandle, 0xFFFF8001);
355
356 svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
357
358 svcCloseHandle(currentHandle);
359
360 free(pico_mmap->buffer);
361 pico_mmap->buffer = NULL;
362 return;
363 }
364 }
365 }
366
367 free(ptr);
368}
369
370#else
e8b61936 371void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
372{
e8b61936 373 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
374 void *req, *ret;
375
376 req = (void *)addr;
377 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
378 if (ret == MAP_FAILED) {
f5d4045b 379 if (log_cb)
380 log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
e8b61936 381 return NULL;
382 }
383
384 if (addr != 0 && ret != (void *)addr) {
f5d4045b 385 if (log_cb)
386 log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
387 addr, ret);
e8b61936 388
389 if (is_fixed) {
390 munmap(ret, size);
391 return NULL;
392 }
393 }
2446536b 394
eac0e638 395 return ret;
2446536b 396}
397
398void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
399{
8c8b7284 400#ifdef __linux__
eac0e638 401 void *ret = mremap(ptr, oldsize, newsize, 0);
402 if (ret == MAP_FAILED)
403 return NULL;
2446536b 404
eac0e638 405 return ret;
8c8b7284 406#else
eac0e638 407 void *tmp, *ret;
408 size_t preserve_size;
409
410 preserve_size = oldsize;
411 if (preserve_size > newsize)
412 preserve_size = newsize;
413 tmp = malloc(preserve_size);
414 if (tmp == NULL)
415 return NULL;
416 memcpy(tmp, ptr, preserve_size);
417
418 munmap(ptr, oldsize);
419 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
420 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
421 if (ret == MAP_FAILED) {
422 free(tmp);
423 return NULL;
424 }
425 memcpy(ret, tmp, preserve_size);
426 free(tmp);
427 return ret;
8c8b7284 428#endif
2446536b 429}
430
431void plat_munmap(void *ptr, size_t size)
432{
eac0e638 433 if (ptr != NULL)
434 munmap(ptr, size);
2446536b 435}
0c732676 436#endif
2446536b 437
c25d78ee 438int plat_mem_set_exec(void *ptr, size_t size)
439{
e8b61936 440#ifdef _WIN32
441 int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
f5d4045b 442 if (ret == 0 && log_cb)
443 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
0c732676 444#elif defined(_3DS)
445 int ret = -1;
446 if (ctr_svchack_successful)
447 {
448 unsigned int currentHandle;
449 svcDuplicateHandle(&currentHandle, 0xFFFF8001);
450 ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
451 size, MEMOP_PROT, 0b111);
452 svcCloseHandle(currentHandle);
453 ctr_flush_invalidate_cache();
454
455 }
456 else
457 {
458 if (log_cb)
459 log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
460 exit(1);
461 }
462
88f7643f 463#elif defined(VITA)
464 int ret = sceKernelOpenVMDomain();
e8b61936 465#else
466 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
f5d4045b 467 if (ret != 0 && log_cb)
468 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
e8b61936 469#endif
eac0e638 470 return ret;
c25d78ee 471}
472
2446536b 473void emu_video_mode_change(int start_line, int line_count, int is_32cols)
474{
eac0e638 475 memset(vout_buf, 0, 320 * 240 * 2);
476 vout_width = is_32cols ? 256 : 320;
477 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
f0a3d0dc 478 if (show_overscan == true) line_count += 16;
479 if (show_overscan == true) start_line -= 8;
51c08950 480
eac0e638 481 vout_height = line_count;
482 vout_offset = vout_width * start_line;
e1360c66
D		 483
484 // Update the geometry
485 struct retro_system_av_info av_info;
486 retro_get_system_av_info(&av_info);
487 environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
2446536b 488}
489
490void emu_32x_startup(void)
491{
2446536b 492}
493
2446536b 494void lprintf(const char *fmt, ...)
495{
c681e48d 496 char buffer[256];
497 va_list ap;
498 va_start(ap, fmt);
499 vsprintf(buffer, fmt, ap);
f5d4045b 500 /* TODO - add 'level' param for warning/error messages? */
501 if (log_cb)
bd7b09f4 502 log_cb(RETRO_LOG_INFO, "%s", buffer);
0c732676 503 va_end(ap);
2446536b 504}
505
2446536b 506/* libretro */
507void retro_set_environment(retro_environment_t cb)
508{
eac0e638 509 static const struct retro_variable vars[] = {
48582bcf
D		 510 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
511 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
512 { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
513 { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
514 { "picodrive_region", "Region; Auto|Japan NTSC|Japan PAL|US|Europe" },
0fa9e859 515 { "picodrive_region_fps", "Region FPS; Auto|NTSC|PAL" },
e1360c66 516 { "picodrive_aspect", "Core-provided aspect ratio; PAR|4/3|CRT" },
f0a3d0dc 517 { "picodrive_overscan", "Show Overscan; disabled|enabled" },
0185b677 518#ifdef DRC_SH2
eac0e638 519 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
0185b677 520#endif
eac0e638 521 { NULL, NULL },
522 };
2446536b 523
eac0e638 524 environ_cb = cb;
2446536b 525
eac0e638 526 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
2446536b 527}
528
529void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
530void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
531void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
532void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
533void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
534
535unsigned retro_api_version(void)
536{
eac0e638 537 return RETRO_API_VERSION;
2446536b 538}
539
540void retro_set_controller_port_device(unsigned port, unsigned device)
541{
542}
543
544void retro_get_system_info(struct retro_system_info *info)
545{
eac0e638 546 memset(info, 0, sizeof(*info));
547 info->library_name = "PicoDrive";
2d4f989d
GR		 548#ifndef GIT_VERSION
549#define GIT_VERSION ""
550#endif
551 info->library_version = VERSION GIT_VERSION;
eac0e638 552 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
553 info->need_fullpath = true;
2446536b 554}
555
556void retro_get_system_av_info(struct retro_system_av_info *info)
557{
eac0e638 558 memset(info, 0, sizeof(*info));
559 info->timing.fps = Pico.m.pal ? 50 : 60;
560 info->timing.sample_rate = 44100;
e1360c66 561 info->geometry.base_width = vout_width;
eac0e638 562 info->geometry.base_height = vout_height;
e1360c66
D		 563 info->geometry.max_width = vout_width;
564 info->geometry.max_height = vout_height;
f0a3d0dc 565
e1360c66
D		 566 float common_width = vout_width;
567 if (user_vout_width != 0)
568 common_width = user_vout_width;
f0a3d0dc 569
e1360c66 570 info->geometry.aspect_ratio = common_width / vout_height;
2446536b 571}
572
86b38dc4 573/* savestates */
574struct savestate_state {
eac0e638 575 const char *load_buf;
576 char *save_buf;
577 size_t size;
578 size_t pos;
86b38dc4 579};
580
581size_t state_read(void *p, size_t size, size_t nmemb, void *file)
582{
eac0e638 583 struct savestate_state *state = file;
584 size_t bsize = size * nmemb;
86b38dc4 585
eac0e638 586 if (state->pos + bsize > state->size) {
f5d4045b 587 if (log_cb)
588 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
589 state->pos + bsize, state->size);
eac0e638 590 bsize = state->size - state->pos;
591 if ((int)bsize <= 0)
592 return 0;
593 }
594
595 memcpy(p, state->load_buf + state->pos, bsize);
596 state->pos += bsize;
597 return bsize;
86b38dc4 598}
599
600size_t state_write(void *p, size_t size, size_t nmemb, void *file)
601{
eac0e638 602 struct savestate_state *state = file;
603 size_t bsize = size * nmemb;
86b38dc4 604
eac0e638 605 if (state->pos + bsize > state->size) {
f5d4045b 606 if (log_cb)
607 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
608 state->pos + bsize, state->size);
eac0e638 609 bsize = state->size - state->pos;
610 if ((int)bsize <= 0)
611 return 0;
612 }
613
614 memcpy(state->save_buf + state->pos, p, bsize);
615 state->pos += bsize;
616 return bsize;
86b38dc4 617}
618
619size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
620{
eac0e638 621 struct savestate_state *state = file;
622 size_t bsize = size * nmemb;
86b38dc4 623
eac0e638 624 state->pos += bsize;
625 return bsize;
86b38dc4 626}
627
628size_t state_eof(void *file)
629{
eac0e638 630 struct savestate_state *state = file;
86b38dc4 631
eac0e638 632 return state->pos >= state->size;
86b38dc4 633}
634
635int state_fseek(void *file, long offset, int whence)
636{
eac0e638 637 struct savestate_state *state = file;
638
639 switch (whence) {
640 case SEEK_SET:
641 state->pos = offset;
642 break;
643 case SEEK_CUR:
644 state->pos += offset;
645 break;
646 case SEEK_END:
647 state->pos = state->size + offset;
648 break;
649 }
650 return (int)state->pos;
86b38dc4 651}
652
653/* savestate sizes vary wildly depending if cd/32x or
654 * carthw is active, so run the whole thing to get size */
eac0e638 655size_t retro_serialize_size(void)
656{
657 struct savestate_state state = { 0, };
658 int ret;
86b38dc4 659
eac0e638 660 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
661 if (ret != 0)
662 return 0;
86b38dc4 663
eac0e638 664 return state.pos;
2446536b 665}
666
667bool retro_serialize(void *data, size_t size)
eac0e638 668{
669 struct savestate_state state = { 0, };
670 int ret;
86b38dc4 671
eac0e638 672 state.save_buf = data;
673 state.size = size;
674 state.pos = 0;
86b38dc4 675
eac0e638 676 ret = PicoStateFP(&state, 1, NULL, state_write,
677 NULL, state_fseek);
678 return ret == 0;
2446536b 679}
680
681bool retro_unserialize(const void *data, size_t size)
682{
eac0e638 683 struct savestate_state state = { 0, };
684 int ret;
86b38dc4 685
eac0e638 686 state.load_buf = data;
687 state.size = size;
688 state.pos = 0;
86b38dc4 689
eac0e638 690 ret = PicoStateFP(&state, 0, state_read, NULL,
691 state_eof, state_fseek);
692 return ret == 0;
2446536b 693}
694
daae6156 695typedef struct patch
696{
697 unsigned int addr;
698 unsigned short data;
699} patch;
700
701extern void decode(char *buff, patch *dest);
702extern uint16_t m68k_read16(uint32_t a);
703extern void m68k_write16(uint32_t a, uint16_t d);
20563b60 704
2446536b 705void retro_cheat_reset(void)
706{
20563b60 707 int i=0;
708 unsigned int addr;
709
710 for (i = 0; i < PicoPatchCount; i++)
711 {
712 addr = PicoPatches[i].addr;
daae6156 713 if (addr < Pico.romsize) {
20563b60 714 if (PicoPatches[i].active)
715 *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
daae6156 716 } else {
20563b60 717 if (PicoPatches[i].active)
718 m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
daae6156 719 }
20563b60 720 }
721
722 PicoPatchUnload();
2446536b 723}
724
6cf45534 725void retro_cheat_set(unsigned index, bool enabled, const char *code)
2446536b 726{
daae6156 727 patch pt;
20563b60 728 int array_len = 0;
daae6156 729 char codeCopy[256];
6cf45534 730 char *buff;
d4089d9b 731 bool multiline=0;
20563b60 732
daae6156 733 strcpy(codeCopy,code);
734
d4089d9b 735 if (strstr(code,"+")){
736 multiline=1;
daae6156 737 buff = strtok(codeCopy,"+");
d4089d9b 738 } else {
daae6156 739 buff=codeCopy;
d4089d9b 740 }
20563b60 741
d4089d9b 742 while (buff != NULL)
6cf45534 743 {
20563b60 744 decode(buff, &pt);
daae6156 745 if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
6cf45534 746 {
20563b60 747 log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
748 return;
749 }
750
751 /* code was good, add it */
752 if (array_len < PicoPatchCount + 1)
753 {
754 void *ptr;
755 array_len *= 2;
756 array_len++;
757 ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
758 if (ptr == NULL) {
759 log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
760 return;
761 }
762 PicoPatches = ptr;
763 }
764 strcpy(PicoPatches[PicoPatchCount].code, buff);
765
20563b60 766 PicoPatches[PicoPatchCount].active = enabled;
767 PicoPatches[PicoPatchCount].addr = pt.addr;
768 PicoPatches[PicoPatchCount].data = pt.data;
769 if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
daae6156 770 PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
20563b60 771 else
daae6156 772 PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
20563b60 773 PicoPatchCount++;
d4089d9b 774
775 if (!multiline)
776 break;
6cf45534 777 }
2446536b 778}
779
780/* multidisk support */
781static bool disk_ejected;
782static unsigned int disk_current_index;
783static unsigned int disk_count;
784static struct disks_state {
eac0e638 785 char *fname;
2446536b 786} disks[8];
787
788static bool disk_set_eject_state(bool ejected)
789{
eac0e638 790 // TODO?
791 disk_ejected = ejected;
792 return true;
2446536b 793}
794
795static bool disk_get_eject_state(void)
796{
eac0e638 797 return disk_ejected;
2446536b 798}
799
800static unsigned int disk_get_image_index(void)
801{
eac0e638 802 return disk_current_index;
2446536b 803}
804
805static bool disk_set_image_index(unsigned int index)
806{
eac0e638 807 enum cd_img_type cd_type;
808 int ret;
2446536b 809
eac0e638 810 if (index >= sizeof(disks) / sizeof(disks[0]))
811 return false;
2446536b 812
eac0e638 813 if (disks[index].fname == NULL) {
f5d4045b 814 if (log_cb)
815 log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
2446536b 816
eac0e638 817 // RetroArch specifies "no disk" with index == count,
818 // so don't fail here..
819 disk_current_index = index;
820 return true;
821 }
2446536b 822
f5d4045b 823 if (log_cb)
824 log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
825 disks[index].fname);
2446536b 826
eac0e638 827 ret = -1;
828 cd_type = PicoCdCheck(disks[index].fname, NULL);
829 if (cd_type != CIT_NOT_CD)
830 ret = cdd_load(disks[index].fname, cd_type);
831 if (ret != 0) {
f5d4045b 832 if (log_cb)
833 log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
eac0e638 834 return 0;
835 }
2446536b 836
eac0e638 837 disk_current_index = index;
838 return true;
2446536b 839}
840
841static unsigned int disk_get_num_images(void)
842{
eac0e638 843 return disk_count;
2446536b 844}
845
846static bool disk_replace_image_index(unsigned index,
eac0e638 847 const struct retro_game_info *info)
2446536b 848{
eac0e638 849 bool ret = true;
2446536b 850
eac0e638 851 if (index >= sizeof(disks) / sizeof(disks[0]))
852 return false;
2446536b 853
eac0e638 854 if (disks[index].fname != NULL)
855 free(disks[index].fname);
856 disks[index].fname = NULL;
2446536b 857
eac0e638 858 if (info != NULL) {
859 disks[index].fname = strdup(info->path);
860 if (index == disk_current_index)
861 ret = disk_set_image_index(index);
862 }
2446536b 863
eac0e638 864 return ret;
2446536b 865}
866
867static bool disk_add_image_index(void)
868{
eac0e638 869 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
870 return false;
2446536b 871
eac0e638 872 disk_count++;
873 return true;
2446536b 874}
875
876static struct retro_disk_control_callback disk_control = {
eac0e638 877 disk_set_eject_state,
878 disk_get_eject_state,
879 disk_get_image_index,
880 disk_set_image_index,
881 disk_get_num_images,
882 disk_replace_image_index,
883 disk_add_image_index,
2446536b 884};
885
886static void disk_tray_open(void)
887{
f5d4045b 888 if (log_cb)
889 log_cb(RETRO_LOG_INFO, "cd tray open\n");
eac0e638 890 disk_ejected = 1;
2446536b 891}
892
893static void disk_tray_close(void)
894{
f5d4045b 895 if (log_cb)
896 log_cb(RETRO_LOG_INFO, "cd tray close\n");
eac0e638 897 disk_ejected = 0;
2446536b 898}
899
900
901static const char * const biosfiles_us[] = {
eac0e638 902 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
2446536b 903};
904static const char * const biosfiles_eu[] = {
eac0e638 905 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
2446536b 906};
907static const char * const biosfiles_jp[] = {
eac0e638 908 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
2446536b 909};
910
911static void make_system_path(char *buf, size_t buf_size,
eac0e638 912 const char *name, const char *ext)
2446536b 913{
eac0e638 914 const char *dir = NULL;
915
916 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
917 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
918 }
919 else {
920 snprintf(buf, buf_size, "%s%s", name, ext);
921 }
2446536b 922}
923
924static const char *find_bios(int *region, const char *cd_fname)
925{
eac0e638 926 const char * const *files;
927 static char path[256];
928 int i, count;
929 FILE *f = NULL;
930
931 if (*region == 4) { // US
932 files = biosfiles_us;
933 count = sizeof(biosfiles_us) / sizeof(char *);
934 } else if (*region == 8) { // EU
935 files = biosfiles_eu;
936 count = sizeof(biosfiles_eu) / sizeof(char *);
937 } else if (*region == 1 || *region == 2) {
938 files = biosfiles_jp;
939 count = sizeof(biosfiles_jp) / sizeof(char *);
940 } else {
941 return NULL;
942 }
943
944 for (i = 0; i < count; i++)
945 {
946 make_system_path(path, sizeof(path), files[i], ".bin");
947 f = fopen(path, "rb");
948 if (f != NULL)
949 break;
950
951 make_system_path(path, sizeof(path), files[i], ".zip");
952 f = fopen(path, "rb");
953 if (f != NULL)
954 break;
955 }
956
957 if (f != NULL) {
f5d4045b 958 if (log_cb)
959 log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
eac0e638 960 fclose(f);
961 return path;
962 }
2446536b 963
eac0e638 964 return NULL;
2446536b 965}
966
6d0aaeaf 967static void sram_reset()
968{
969 SRam.data = NULL;
970 SRam.start = 0;
971 SRam.end = 0;
972 SRam.flags = '\0';
973 SRam.unused2 = '\0';
974 SRam.changed = '\0' ;
975 SRam.eeprom_type = '\0';
976 SRam.unused3 = '\0';
977 SRam.eeprom_bit_cl = '\0';
978 SRam.eeprom_bit_in = '\0';
979 SRam.eeprom_bit_out = '\0';
980 SRam.size = 0;
981}
982
2446536b 983bool retro_load_game(const struct retro_game_info *info)
984{
eac0e638 985 enum media_type_e media_type;
986 static char carthw_path[256];
987 size_t i;
2446536b 988
a1f2e1b1 989 struct retro_input_descriptor desc[] = {
990 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
991 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
992 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
993 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
994 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
995 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
996 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
997 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
998 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
999 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
17d4733d
D		 1000 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
1001 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
a1f2e1b1 1002
1003 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
1004 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
1005 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
1006 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
1007 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
1008 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
1009 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
1010 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
1011 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
1012 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
17d4733d
D		 1013 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
1014 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
a1f2e1b1 1015
1016 { 0 },
1017 };
1018
17d4733d
D		 1019 struct retro_input_descriptor desc_sms[] = {
1020 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
1021 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
1022 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
1023 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
0fa9e859
D		 1024 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
1025 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
1026 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
17d4733d
D		 1027
1028 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
1029 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
1030 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
1031 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
0fa9e859
D		 1032 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
1033 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
1034 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
17d4733d
D		 1035
1036 { 0 },
1037 };
a1f2e1b1 1038
6d0aaeaf 1039 sram_reset();
1040
eac0e638 1041 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
1042 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
f5d4045b 1043 if (log_cb)
1044 log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
eac0e638 1045 return false;
1046 }
2446536b 1047
eac0e638 1048 if (info == NULL || info->path == NULL) {
f5d4045b 1049 if (log_cb)
1050 log_cb(RETRO_LOG_ERROR, "info->path required\n");
eac0e638 1051 return false;
1052 }
2446536b 1053
eac0e638 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 }
2446536b 1060
eac0e638 1061 disk_current_index = 0;
1062 disk_count = 1;
1063 disks[0].fname = strdup(info->path);
2446536b 1064
eac0e638 1065 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
2446536b 1066
eac0e638 1067 media_type = PicoLoadMedia(info->path, carthw_path,
1068 find_bios, NULL);
2446536b 1069
eac0e638 1070 switch (media_type) {
1071 case PM_BAD_DETECT:
f5d4045b 1072 if (log_cb)
1073 log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
eac0e638 1074 return false;
1075 case PM_BAD_CD:
f5d4045b 1076 if (log_cb)
1077 log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
eac0e638 1078 return false;
1079 case PM_BAD_CD_NO_BIOS:
f5d4045b 1080 if (log_cb)
1081 log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
eac0e638 1082 return false;
1083 case PM_ERROR:
f5d4045b 1084 if (log_cb)
1085 log_cb(RETRO_LOG_ERROR, "Load error\n");
eac0e638 1086 return false;
1087 default:
1088 break;
1089 }
2446536b 1090
17d4733d
D		 1091 if (media_type == PM_MARK3)
1092 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
1093 else
1094 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
1095
eac0e638 1096 PicoLoopPrepare();
2446536b 1097
eac0e638 1098 PicoWriteSound = snd_write;
1099 memset(sndBuffer, 0, sizeof(sndBuffer));
1100 PsndOut = sndBuffer;
1101 PsndRerate(0);
2446536b 1102
eac0e638 1103 return true;
2446536b 1104}
1105
1106bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
1107{
eac0e638 1108 return false;
2446536b 1109}
1110
eac0e638 1111void retro_unload_game(void)
2446536b 1112{
1113}
1114
1115unsigned retro_get_region(void)
1116{
eac0e638 1117 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
2446536b 1118}
1119
c3e69f81 1120void *retro_get_memory_data(unsigned type)
2446536b 1121{
c3e69f81 1122 uint8_t* data;
2446536b 1123
c3e69f81
DS		 1124 switch(type)
1125 {
1126 case RETRO_MEMORY_SAVE_RAM:
1127 if (PicoAHW & PAHW_MCD)
1128 data = Pico_mcd->bram;
1129 else
1130 data = SRam.data;
1131 break;
1132 case RETRO_MEMORY_SYSTEM_RAM:
1133 if (PicoAHW & PAHW_SMS)
1134 data = Pico.vramb;
1135 else
1136 data = Pico.ram;
1137 break;
1138 default:
1139 data = NULL;
1140 break;
1141 }
f0a3d0dc 1142
c3e69f81 1143 return data;
2446536b 1144}
1145
c3e69f81 1146size_t retro_get_memory_size(unsigned type)
2446536b 1147{
eac0e638 1148 unsigned int i;
1149 int sum;
f0a3d0dc 1150
c3e69f81
DS		 1151 switch(type)
1152 {
1153 case RETRO_MEMORY_SAVE_RAM:
1154 if (PicoAHW & PAHW_MCD)
1155 // bram
1156 return 0x2000;
1157
1158 if (Pico.m.frame_count == 0)
1159 return SRam.size;
1160
1161 // if game doesn't write to sram, don't report it to
1162 // libretro so that RA doesn't write out zeroed .srm
1163 for (i = 0, sum = 0; i < SRam.size; i++)
1164 sum |= SRam.data[i];
1165
1166 return (sum != 0) ? SRam.size : 0;
f0a3d0dc 1167
c3e69f81
DS		 1168 case RETRO_MEMORY_SYSTEM_RAM:
1169 if (PicoAHW & PAHW_SMS)
1170 return sizeof(Pico.vramb);
1171 else
1172 return sizeof(Pico.ram);
f0a3d0dc 1173
c3e69f81
DS		 1174 default:
1175 return 0;
1176 }
f0a3d0dc 1177
2446536b 1178}
1179
1180void retro_reset(void)
1181{
eac0e638 1182 PicoReset();
2446536b 1183}
1184
1185static const unsigned short retro_pico_map[] = {
eac0e638 1186 1 << GBTN_B,
1187 1 << GBTN_A,
1188 1 << GBTN_MODE,
1189 1 << GBTN_START,
1190 1 << GBTN_UP,
1191 1 << GBTN_DOWN,
1192 1 << GBTN_LEFT,
1193 1 << GBTN_RIGHT,
1194 1 << GBTN_C,
1195 1 << GBTN_Y,
1196 1 << GBTN_X,
1197 1 << GBTN_Z,
2446536b 1198};
1199#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
1200
1201static void snd_write(int len)
1202{
eac0e638 1203 audio_batch_cb(PsndOut, len / 4);
2446536b 1204}
1205
531a8f38 1206static enum input_device input_name_to_val(const char *name)
1207{
eac0e638 1208 if (strcmp(name, "3 button pad") == 0)
1209 return PICO_INPUT_PAD_3BTN;
1210 if (strcmp(name, "6 button pad") == 0)
1211 return PICO_INPUT_PAD_6BTN;
1212 if (strcmp(name, "None") == 0)
1213 return PICO_INPUT_NOTHING;
531a8f38 1214
f5d4045b 1215 if (log_cb)
1216 log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
eac0e638 1217 return PICO_INPUT_PAD_3BTN;
531a8f38 1218}
1219
1220static void update_variables(void)
1221{
eac0e638 1222 struct retro_variable var;
1223
1224 var.value = NULL;
1225 var.key = "picodrive_input1";
1226 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1227 PicoSetInputDevice(0, input_name_to_val(var.value));
1228
1229 var.value = NULL;
1230 var.key = "picodrive_input2";
1231 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1232 PicoSetInputDevice(1, input_name_to_val(var.value));
1233
1234 var.value = NULL;
1235 var.key = "picodrive_sprlim";
1236 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1237 if (strcmp(var.value, "enabled") == 0)
1238 PicoOpt |= POPT_DIS_SPRITE_LIM;
1239 else
1240 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
1241 }
1242
1243 var.value = NULL;
1244 var.key = "picodrive_ramcart";
1245 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1246 if (strcmp(var.value, "enabled") == 0)
1247 PicoOpt |= POPT_EN_MCD_RAMCART;
1248 else
1249 PicoOpt &= ~POPT_EN_MCD_RAMCART;
1250 }
1251
48582bcf 1252 int OldPicoRegionOverride = PicoRegionOverride;
eac0e638 1253 var.value = NULL;
1254 var.key = "picodrive_region";
1255 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1256 if (strcmp(var.value, "Auto") == 0)
1257 PicoRegionOverride = 0;
1258 else if (strcmp(var.value, "Japan NTSC") == 0)
1259 PicoRegionOverride = 1;
1260 else if (strcmp(var.value, "Japan PAL") == 0)
1261 PicoRegionOverride = 2;
1262 else if (strcmp(var.value, "US") == 0)
1263 PicoRegionOverride = 4;
1264 else if (strcmp(var.value, "Europe") == 0)
1265 PicoRegionOverride = 8;
1266 }
b38bccea 1267
48582bcf
D		 1268 int OldPicoRegionFPSOverride = PicoRegionFPSOverride;
1269 var.value = NULL;
1270 var.key = "picodrive_region_fps";
1271 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1272 if (strcmp(var.value, "Auto") == 0)
1273 PicoRegionFPSOverride = 0;
1274 else if (strcmp(var.value, "NTSC") == 0)
1275 PicoRegionFPSOverride = 1;
1276 else if (strcmp(var.value, "PAL") == 0)
f0a3d0dc 1277 PicoRegionFPSOverride = 2;
48582bcf 1278 }
17d4733d 1279
48582bcf
D		 1280 // Update region, fps and sound flags if needed
1281 if (PicoRegionOverride != OldPicoRegionOverride ||
1282 PicoRegionFPSOverride != OldPicoRegionFPSOverride)
1283 {
1284 PicoDetectRegion();
1285 PicoLoopPrepare();
1286 PsndRerate(1);
1287 }
17d4733d 1288
e1360c66
D		 1289 float old_user_vout_width = user_vout_width;
1290 var.value = NULL;
1291 var.key = "picodrive_aspect";
1292 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1293 if (strcmp(var.value, "4/3") == 0)
1294 user_vout_width = VOUT_4_3;
1295 else if (strcmp(var.value, "CRT") == 0)
1296 user_vout_width = VOUT_CRT;
1297 else
f0a3d0dc 1298 user_vout_width = VOUT_PAR;
1299 }
1300
1301 var.value = NULL;
1302 var.key = "picodrive_overscan";
1303 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1304 if (strcmp(var.value, "enabled") == 0)
1305 show_overscan = true;
1306 else
1307 show_overscan = false;
e1360c66
D		 1308 }
1309
1310 if (user_vout_width != old_user_vout_width)
1311 {
1312 // Update the geometry
1313 struct retro_system_av_info av_info;
1314 retro_get_system_av_info(&av_info);
1315 environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
1316 }
1317
0185b677 1318#ifdef DRC_SH2
eac0e638 1319 var.value = NULL;
1320 var.key = "picodrive_drc";
1321 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1322 if (strcmp(var.value, "enabled") == 0)
1323 PicoOpt |= POPT_EN_DRC;
1324 else
1325 PicoOpt &= ~POPT_EN_DRC;
1326 }
0185b677 1327#endif
0c732676 1328#ifdef _3DS
1329 if(!ctr_svchack_successful)
1330 PicoOpt &= ~POPT_EN_DRC;
1331#endif
531a8f38 1332}
1333
eac0e638 1334void retro_run(void)
2446536b 1335{
eac0e638 1336 bool updated = false;
1337 int pad, i;
2446536b 1338
eac0e638 1339 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
1340 update_variables();
2446536b 1341
0c732676 1342 input_poll_cb();
2446536b 1343
eac0e638 1344 PicoPad[0] = PicoPad[1] = 0;
1345 for (pad = 0; pad < 2; pad++)
1346 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
1347 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
1348 PicoPad[pad] |= retro_pico_map[i];
2446536b 1349
20563b60 1350 PicoPatchApply();
eac0e638 1351 PicoFrame();
2446536b 1352
eac0e638 1353 video_cb((short *)vout_buf + vout_offset,
1354 vout_width, vout_height, vout_width * 2);
2446536b 1355}
1356
2f832b7f 1357static void check_system_specs(void)
1358{
1359 /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */
1360 unsigned level = 5;
1361 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1362}
1363
2446536b 1364void retro_init(void)
1365{
f5d4045b 1366 struct retro_log_callback log;
eac0e638 1367 int level;
2446536b 1368
eac0e638 1369 level = 0;
1370 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
2446536b 1371
c681e48d 1372 if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
f5d4045b 1373 log_cb = log.log;
c681e48d 1374 else
1375 log_cb = NULL;
f5d4045b 1376
eac0e638 1377 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
2446536b 1378
0c732676 1379#ifdef _3DS
1380 ctr_svchack_successful = ctr_svchack_init();
88f7643f 1381#elif defined(VITA)
1382 sceBlock = getVMBlock();
0c732676 1383#endif
1384
eac0e638 1385 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
1386 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
1387 | POPT_EN_32X|POPT_EN_PWM
1388 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
720bfc5d 1389#ifdef __arm__
0c732676 1390#ifdef _3DS
1391 if (ctr_svchack_successful)
1392#endif
1393 PicoOpt |= POPT_EN_DRC;
720bfc5d 1394#endif
eac0e638 1395 PsndRate = 44100;
1396 PicoAutoRgnOrder = 0x184; // US, EU, JP
2446536b 1397
eac0e638 1398 vout_width = 320;
0c732676 1399 vout_height = 240;
ad2ccfbc 1400#ifdef _3DS
1401 vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
1402#else
0c732676 1403 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
ad2ccfbc 1404#endif
2446536b 1405
0c732676 1406 PicoInit();
1407 PicoDrawSetOutFormat(PDF_RGB555, 0);
1408 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
2446536b 1409
eac0e638 1410 //PicoMessage = plat_status_msg_busy_next;
1411 PicoMCDopenTray = disk_tray_open;
1412 PicoMCDcloseTray = disk_tray_close;
531a8f38 1413
0c732676 1414 update_variables();
2446536b 1415}
1416
1417void retro_deinit(void)
1418{
ad2ccfbc 1419#ifdef _3DS
1420 linearFree(vout_buf);
1421#else
1422 free(vout_buf);
1423#endif
1424 vout_buf = NULL;
eac0e638 1425 PicoExit();
2446536b 1426}
fast MegaDrive/MegaCD/32X emulator