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[picodrive.git] / platform / libretro / libretro.c
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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
695/* cheats - TODO */
20563b60 696
2446536b 697void retro_cheat_reset(void)
698{
20563b60 699 int i=0;
700 unsigned int addr;
701
702 for (i = 0; i < PicoPatchCount; i++)
703 {
704 addr = PicoPatches[i].addr;
705 if (addr < Pico.romsize)
706 if (PicoPatches[i].active)
707 *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
708 else
709 if (PicoPatches[i].active)
710 m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
711 }
712
713 PicoPatchUnload();
2446536b 714}
715
6cf45534 716void retro_cheat_set(unsigned index, bool enabled, const char *code)
2446536b 717{
20563b60 718 struct patch
719 {
720 unsigned int addr;
721 unsigned short data;
722 } pt;
723 int array_len = 0;
6cf45534 724 char *buff;
20563b60 725
726 //TODO: Split multi-line codes properly
6cf45534 727 buff = strtok(code,"+");
20563b60 728
6cf45534 729 while (buff)
730 {
20563b60 731 decode(buff, &pt);
6cf45534 732 if (pt.addr == (unsigned int)-1 || pt.data == (unsigned short)-1)
733 {
20563b60 734 log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
735 return;
736 }
737
738 /* code was good, add it */
739 if (array_len < PicoPatchCount + 1)
740 {
741 void *ptr;
742 array_len *= 2;
743 array_len++;
744 ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
745 if (ptr == NULL) {
746 log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
747 return;
748 }
749 PicoPatches = ptr;
750 }
751 strcpy(PicoPatches[PicoPatchCount].code, buff);
752
753 PicoPatches[PicoPatchCount].name[51] = "";
754 PicoPatches[PicoPatchCount].active = enabled;
755 PicoPatches[PicoPatchCount].addr = pt.addr;
756 PicoPatches[PicoPatchCount].data = pt.data;
757 if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
758 PicoPatches[PicoPatchCount].data_old = *(unsigned short *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
759 else
760 PicoPatches[PicoPatchCount].data_old = (unsigned short) m68k_read16(PicoPatches[PicoPatchCount].addr);
761 PicoPatchCount++;
6cf45534 762 }
2446536b 763}
764
765/* multidisk support */
766static bool disk_ejected;
767static unsigned int disk_current_index;
768static unsigned int disk_count;
769static struct disks_state {
eac0e638 770 char *fname;
2446536b 771} disks[8];
772
773static bool disk_set_eject_state(bool ejected)
774{
eac0e638 775 // TODO?
776 disk_ejected = ejected;
777 return true;
2446536b 778}
779
780static bool disk_get_eject_state(void)
781{
eac0e638 782 return disk_ejected;
2446536b 783}
784
785static unsigned int disk_get_image_index(void)
786{
eac0e638 787 return disk_current_index;
2446536b 788}
789
790static bool disk_set_image_index(unsigned int index)
791{
eac0e638 792 enum cd_img_type cd_type;
793 int ret;
2446536b 794
eac0e638 795 if (index >= sizeof(disks) / sizeof(disks[0]))
796 return false;
2446536b 797
eac0e638 798 if (disks[index].fname == NULL) {
f5d4045b 799 if (log_cb)
800 log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
2446536b 801
eac0e638 802 // RetroArch specifies "no disk" with index == count,
803 // so don't fail here..
804 disk_current_index = index;
805 return true;
806 }
2446536b 807
f5d4045b 808 if (log_cb)
809 log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
810 disks[index].fname);
2446536b 811
eac0e638 812 ret = -1;
813 cd_type = PicoCdCheck(disks[index].fname, NULL);
814 if (cd_type != CIT_NOT_CD)
815 ret = cdd_load(disks[index].fname, cd_type);
816 if (ret != 0) {
f5d4045b 817 if (log_cb)
818 log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
eac0e638 819 return 0;
820 }
2446536b 821
eac0e638 822 disk_current_index = index;
823 return true;
2446536b 824}
825
826static unsigned int disk_get_num_images(void)
827{
eac0e638 828 return disk_count;
2446536b 829}
830
831static bool disk_replace_image_index(unsigned index,
eac0e638 832 const struct retro_game_info *info)
2446536b 833{
eac0e638 834 bool ret = true;
2446536b 835
eac0e638 836 if (index >= sizeof(disks) / sizeof(disks[0]))
837 return false;
2446536b 838
eac0e638 839 if (disks[index].fname != NULL)
840 free(disks[index].fname);
841 disks[index].fname = NULL;
2446536b 842
eac0e638 843 if (info != NULL) {
844 disks[index].fname = strdup(info->path);
845 if (index == disk_current_index)
846 ret = disk_set_image_index(index);
847 }
2446536b 848
eac0e638 849 return ret;
2446536b 850}
851
852static bool disk_add_image_index(void)
853{
eac0e638 854 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
855 return false;
2446536b 856
eac0e638 857 disk_count++;
858 return true;
2446536b 859}
860
861static struct retro_disk_control_callback disk_control = {
eac0e638 862 disk_set_eject_state,
863 disk_get_eject_state,
864 disk_get_image_index,
865 disk_set_image_index,
866 disk_get_num_images,
867 disk_replace_image_index,
868 disk_add_image_index,
2446536b 869};
870
871static void disk_tray_open(void)
872{
f5d4045b 873 if (log_cb)
874 log_cb(RETRO_LOG_INFO, "cd tray open\n");
eac0e638 875 disk_ejected = 1;
2446536b 876}
877
878static void disk_tray_close(void)
879{
f5d4045b 880 if (log_cb)
881 log_cb(RETRO_LOG_INFO, "cd tray close\n");
eac0e638 882 disk_ejected = 0;
2446536b 883}
884
885
886static const char * const biosfiles_us[] = {
eac0e638 887 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
2446536b 888};
889static const char * const biosfiles_eu[] = {
eac0e638 890 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
2446536b 891};
892static const char * const biosfiles_jp[] = {
eac0e638 893 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
2446536b 894};
895
896static void make_system_path(char *buf, size_t buf_size,
eac0e638 897 const char *name, const char *ext)
2446536b 898{
eac0e638 899 const char *dir = NULL;
900
901 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
902 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
903 }
904 else {
905 snprintf(buf, buf_size, "%s%s", name, ext);
906 }
2446536b 907}
908
909static const char *find_bios(int *region, const char *cd_fname)
910{
eac0e638 911 const char * const *files;
912 static char path[256];
913 int i, count;
914 FILE *f = NULL;
915
916 if (*region == 4) { // US
917 files = biosfiles_us;
918 count = sizeof(biosfiles_us) / sizeof(char *);
919 } else if (*region == 8) { // EU
920 files = biosfiles_eu;
921 count = sizeof(biosfiles_eu) / sizeof(char *);
922 } else if (*region == 1 || *region == 2) {
923 files = biosfiles_jp;
924 count = sizeof(biosfiles_jp) / sizeof(char *);
925 } else {
926 return NULL;
927 }
928
929 for (i = 0; i < count; i++)
930 {
931 make_system_path(path, sizeof(path), files[i], ".bin");
932 f = fopen(path, "rb");
933 if (f != NULL)
934 break;
935
936 make_system_path(path, sizeof(path), files[i], ".zip");
937 f = fopen(path, "rb");
938 if (f != NULL)
939 break;
940 }
941
942 if (f != NULL) {
f5d4045b 943 if (log_cb)
944 log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
eac0e638 945 fclose(f);
946 return path;
947 }
2446536b 948
eac0e638 949 return NULL;
2446536b 950}
951
6d0aaeaf 952static void sram_reset()
953{
954 SRam.data = NULL;
955 SRam.start = 0;
956 SRam.end = 0;
957 SRam.flags = '\0';
958 SRam.unused2 = '\0';
959 SRam.changed = '\0' ;
960 SRam.eeprom_type = '\0';
961 SRam.unused3 = '\0';
962 SRam.eeprom_bit_cl = '\0';
963 SRam.eeprom_bit_in = '\0';
964 SRam.eeprom_bit_out = '\0';
965 SRam.size = 0;
966}
967
2446536b 968bool retro_load_game(const struct retro_game_info *info)
969{
eac0e638 970 enum media_type_e media_type;
971 static char carthw_path[256];
972 size_t i;
2446536b 973
a1f2e1b1 974 struct retro_input_descriptor desc[] = {
975 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
976 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
977 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
978 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
979 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
980 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
981 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
982 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
983 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
984 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
17d4733d
D		 985 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
986 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
a1f2e1b1 987
988 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
989 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
990 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
991 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
992 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
993 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
994 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
995 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
996 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
997 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
17d4733d
D		 998 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
999 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
a1f2e1b1 1000
1001 { 0 },
1002 };
1003
17d4733d
D		 1004 struct retro_input_descriptor desc_sms[] = {
1005 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
1006 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
1007 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
1008 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
0fa9e859
D		 1009 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
1010 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
1011 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
17d4733d
D		 1012
1013 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
1014 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
1015 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
1016 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
0fa9e859
D		 1017 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
1018 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
1019 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
17d4733d
D		 1020
1021 { 0 },
1022 };
a1f2e1b1 1023
6d0aaeaf 1024 sram_reset();
1025
eac0e638 1026 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
1027 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
f5d4045b 1028 if (log_cb)
1029 log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
eac0e638 1030 return false;
1031 }
2446536b 1032
eac0e638 1033 if (info == NULL || info->path == NULL) {
f5d4045b 1034 if (log_cb)
1035 log_cb(RETRO_LOG_ERROR, "info->path required\n");
eac0e638 1036 return false;
1037 }
2446536b 1038
eac0e638 1039 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
1040 if (disks[i].fname != NULL) {
1041 free(disks[i].fname);
1042 disks[i].fname = NULL;
1043 }
1044 }
2446536b 1045
eac0e638 1046 disk_current_index = 0;
1047 disk_count = 1;
1048 disks[0].fname = strdup(info->path);
2446536b 1049
eac0e638 1050 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
2446536b 1051
eac0e638 1052 media_type = PicoLoadMedia(info->path, carthw_path,
1053 find_bios, NULL);
2446536b 1054
eac0e638 1055 switch (media_type) {
1056 case PM_BAD_DETECT:
f5d4045b 1057 if (log_cb)
1058 log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
eac0e638 1059 return false;
1060 case PM_BAD_CD:
f5d4045b 1061 if (log_cb)
1062 log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
eac0e638 1063 return false;
1064 case PM_BAD_CD_NO_BIOS:
f5d4045b 1065 if (log_cb)
1066 log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
eac0e638 1067 return false;
1068 case PM_ERROR:
f5d4045b 1069 if (log_cb)
1070 log_cb(RETRO_LOG_ERROR, "Load error\n");
eac0e638 1071 return false;
1072 default:
1073 break;
1074 }
2446536b 1075
17d4733d
D		 1076 if (media_type == PM_MARK3)
1077 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
1078 else
1079 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
1080
eac0e638 1081 PicoLoopPrepare();
2446536b 1082
eac0e638 1083 PicoWriteSound = snd_write;
1084 memset(sndBuffer, 0, sizeof(sndBuffer));
1085 PsndOut = sndBuffer;
1086 PsndRerate(0);
2446536b 1087
eac0e638 1088 return true;
2446536b 1089}
1090
1091bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
1092{
eac0e638 1093 return false;
2446536b 1094}
1095
eac0e638 1096void retro_unload_game(void)
2446536b 1097{
1098}
1099
1100unsigned retro_get_region(void)
1101{
eac0e638 1102 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
2446536b 1103}
1104
c3e69f81 1105void *retro_get_memory_data(unsigned type)
2446536b 1106{
c3e69f81 1107 uint8_t* data;
2446536b 1108
c3e69f81
DS		 1109 switch(type)
1110 {
1111 case RETRO_MEMORY_SAVE_RAM:
1112 if (PicoAHW & PAHW_MCD)
1113 data = Pico_mcd->bram;
1114 else
1115 data = SRam.data;
1116 break;
1117 case RETRO_MEMORY_SYSTEM_RAM:
1118 if (PicoAHW & PAHW_SMS)
1119 data = Pico.vramb;
1120 else
1121 data = Pico.ram;
1122 break;
1123 default:
1124 data = NULL;
1125 break;
1126 }
f0a3d0dc 1127
c3e69f81 1128 return data;
2446536b 1129}
1130
c3e69f81 1131size_t retro_get_memory_size(unsigned type)
2446536b 1132{
eac0e638 1133 unsigned int i;
1134 int sum;
f0a3d0dc 1135
c3e69f81
DS		 1136 switch(type)
1137 {
1138 case RETRO_MEMORY_SAVE_RAM:
1139 if (PicoAHW & PAHW_MCD)
1140 // bram
1141 return 0x2000;
1142
1143 if (Pico.m.frame_count == 0)
1144 return SRam.size;
1145
1146 // if game doesn't write to sram, don't report it to
1147 // libretro so that RA doesn't write out zeroed .srm
1148 for (i = 0, sum = 0; i < SRam.size; i++)
1149 sum |= SRam.data[i];
1150
1151 return (sum != 0) ? SRam.size : 0;
f0a3d0dc 1152
c3e69f81
DS		 1153 case RETRO_MEMORY_SYSTEM_RAM:
1154 if (PicoAHW & PAHW_SMS)
1155 return sizeof(Pico.vramb);
1156 else
1157 return sizeof(Pico.ram);
f0a3d0dc 1158
c3e69f81
DS		 1159 default:
1160 return 0;
1161 }
f0a3d0dc 1162
2446536b 1163}
1164
1165void retro_reset(void)
1166{
eac0e638 1167 PicoReset();
2446536b 1168}
1169
1170static const unsigned short retro_pico_map[] = {
eac0e638 1171 1 << GBTN_B,
1172 1 << GBTN_A,
1173 1 << GBTN_MODE,
1174 1 << GBTN_START,
1175 1 << GBTN_UP,
1176 1 << GBTN_DOWN,
1177 1 << GBTN_LEFT,
1178 1 << GBTN_RIGHT,
1179 1 << GBTN_C,
1180 1 << GBTN_Y,
1181 1 << GBTN_X,
1182 1 << GBTN_Z,
2446536b 1183};
1184#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
1185
1186static void snd_write(int len)
1187{
eac0e638 1188 audio_batch_cb(PsndOut, len / 4);
2446536b 1189}
1190
531a8f38 1191static enum input_device input_name_to_val(const char *name)
1192{
eac0e638 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;
531a8f38 1199
f5d4045b 1200 if (log_cb)
1201 log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
eac0e638 1202 return PICO_INPUT_PAD_3BTN;
531a8f38 1203}
1204
1205static void update_variables(void)
1206{
eac0e638 1207 struct retro_variable var;
1208
1209 var.value = NULL;
1210 var.key = "picodrive_input1";
1211 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1212 PicoSetInputDevice(0, input_name_to_val(var.value));
1213
1214 var.value = NULL;
1215 var.key = "picodrive_input2";
1216 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1217 PicoSetInputDevice(1, input_name_to_val(var.value));
1218
1219 var.value = NULL;
1220 var.key = "picodrive_sprlim";
1221 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1222 if (strcmp(var.value, "enabled") == 0)
1223 PicoOpt |= POPT_DIS_SPRITE_LIM;
1224 else
1225 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
1226 }
1227
1228 var.value = NULL;
1229 var.key = "picodrive_ramcart";
1230 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1231 if (strcmp(var.value, "enabled") == 0)
1232 PicoOpt |= POPT_EN_MCD_RAMCART;
1233 else
1234 PicoOpt &= ~POPT_EN_MCD_RAMCART;
1235 }
1236
48582bcf 1237 int OldPicoRegionOverride = PicoRegionOverride;
eac0e638 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 PicoRegionOverride = 0;
1243 else if (strcmp(var.value, "Japan NTSC") == 0)
1244 PicoRegionOverride = 1;
1245 else if (strcmp(var.value, "Japan PAL") == 0)
1246 PicoRegionOverride = 2;
1247 else if (strcmp(var.value, "US") == 0)
1248 PicoRegionOverride = 4;
1249 else if (strcmp(var.value, "Europe") == 0)
1250 PicoRegionOverride = 8;
1251 }
b38bccea 1252
48582bcf
D		 1253 int OldPicoRegionFPSOverride = PicoRegionFPSOverride;
1254 var.value = NULL;
1255 var.key = "picodrive_region_fps";
1256 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1257 if (strcmp(var.value, "Auto") == 0)
1258 PicoRegionFPSOverride = 0;
1259 else if (strcmp(var.value, "NTSC") == 0)
1260 PicoRegionFPSOverride = 1;
1261 else if (strcmp(var.value, "PAL") == 0)
f0a3d0dc 1262 PicoRegionFPSOverride = 2;
48582bcf 1263 }
17d4733d 1264
48582bcf
D		 1265 // Update region, fps and sound flags if needed
1266 if (PicoRegionOverride != OldPicoRegionOverride ||
1267 PicoRegionFPSOverride != OldPicoRegionFPSOverride)
1268 {
1269 PicoDetectRegion();
1270 PicoLoopPrepare();
1271 PsndRerate(1);
1272 }
17d4733d 1273
e1360c66
D		 1274 float old_user_vout_width = user_vout_width;
1275 var.value = NULL;
1276 var.key = "picodrive_aspect";
1277 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1278 if (strcmp(var.value, "4/3") == 0)
1279 user_vout_width = VOUT_4_3;
1280 else if (strcmp(var.value, "CRT") == 0)
1281 user_vout_width = VOUT_CRT;
1282 else
f0a3d0dc 1283 user_vout_width = VOUT_PAR;
1284 }
1285
1286 var.value = NULL;
1287 var.key = "picodrive_overscan";
1288 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1289 if (strcmp(var.value, "enabled") == 0)
1290 show_overscan = true;
1291 else
1292 show_overscan = false;
e1360c66
D		 1293 }
1294
1295 if (user_vout_width != old_user_vout_width)
1296 {
1297 // Update the geometry
1298 struct retro_system_av_info av_info;
1299 retro_get_system_av_info(&av_info);
1300 environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
1301 }
1302
0185b677 1303#ifdef DRC_SH2
eac0e638 1304 var.value = NULL;
1305 var.key = "picodrive_drc";
1306 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1307 if (strcmp(var.value, "enabled") == 0)
1308 PicoOpt |= POPT_EN_DRC;
1309 else
1310 PicoOpt &= ~POPT_EN_DRC;
1311 }
0185b677 1312#endif
0c732676 1313#ifdef _3DS
1314 if(!ctr_svchack_successful)
1315 PicoOpt &= ~POPT_EN_DRC;
1316#endif
531a8f38 1317}
1318
eac0e638 1319void retro_run(void)
2446536b 1320{
eac0e638 1321 bool updated = false;
1322 int pad, i;
2446536b 1323
eac0e638 1324 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
1325 update_variables();
2446536b 1326
0c732676 1327 input_poll_cb();
2446536b 1328
eac0e638 1329 PicoPad[0] = PicoPad[1] = 0;
1330 for (pad = 0; pad < 2; pad++)
1331 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
1332 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
1333 PicoPad[pad] |= retro_pico_map[i];
2446536b 1334
20563b60 1335 PicoPatchApply();
eac0e638 1336 PicoFrame();
2446536b 1337
eac0e638 1338 video_cb((short *)vout_buf + vout_offset,
1339 vout_width, vout_height, vout_width * 2);
2446536b 1340}
1341
2f832b7f 1342static void check_system_specs(void)
1343{
1344 /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */
1345 unsigned level = 5;
1346 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1347}
1348
2446536b 1349void retro_init(void)
1350{
f5d4045b 1351 struct retro_log_callback log;
eac0e638 1352 int level;
2446536b 1353
eac0e638 1354 level = 0;
1355 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
2446536b 1356
c681e48d 1357 if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
f5d4045b 1358 log_cb = log.log;
c681e48d 1359 else
1360 log_cb = NULL;
f5d4045b 1361
eac0e638 1362 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
2446536b 1363
0c732676 1364#ifdef _3DS
1365 ctr_svchack_successful = ctr_svchack_init();
88f7643f 1366#elif defined(VITA)
1367 sceBlock = getVMBlock();
0c732676 1368#endif
1369
eac0e638 1370 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
1371 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
1372 | POPT_EN_32X|POPT_EN_PWM
1373 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
720bfc5d 1374#ifdef __arm__
0c732676 1375#ifdef _3DS
1376 if (ctr_svchack_successful)
1377#endif
1378 PicoOpt |= POPT_EN_DRC;
720bfc5d 1379#endif
eac0e638 1380 PsndRate = 44100;
1381 PicoAutoRgnOrder = 0x184; // US, EU, JP
2446536b 1382
eac0e638 1383 vout_width = 320;
0c732676 1384 vout_height = 240;
ad2ccfbc 1385#ifdef _3DS
1386 vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
1387#else
0c732676 1388 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
ad2ccfbc 1389#endif
2446536b 1390
0c732676 1391 PicoInit();
1392 PicoDrawSetOutFormat(PDF_RGB555, 0);
1393 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
2446536b 1394
eac0e638 1395 //PicoMessage = plat_status_msg_busy_next;
1396 PicoMCDopenTray = disk_tray_open;
1397 PicoMCDcloseTray = disk_tray_close;
531a8f38 1398
0c732676 1399 update_variables();
2446536b 1400}
1401
1402void retro_deinit(void)
1403{
ad2ccfbc 1404#ifdef _3DS
1405 linearFree(vout_buf);
1406#else
1407 free(vout_buf);
1408#endif
1409 vout_buf = NULL;
eac0e638 1410 PicoExit();
2446536b 1411}
fast MegaDrive/MegaCD/32X emulator