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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
4 *
5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
7 */
8
9#define _GNU_SOURCE 1 // mremap
10#include <stdio.h>
11#include <stdarg.h>
12#include <string.h>
e8b61936 13#ifndef _WIN32
f18d0e08 14#ifndef NO_MMAP
2446536b 15#include <sys/mman.h>
f18d0e08 16#endif
e8b61936 17#else
6f1133bc 18#include <io.h>
e8b61936 19#include <windows.h>
6f1133bc 20#include <sys/types.h>
e8b61936 21#endif
c25d78ee 22#include <errno.h>
2446536b 23#ifdef __MACH__
24#include <libkern/OSCacheControl.h>
25#endif
26
27#include <pico/pico_int.h>
86b38dc4 28#include <pico/state.h>
5345c2b9
T		 29#include "../common/input_pico.h"
30#include "../common/version.h"
2446536b 31#include "libretro.h"
32
f5d4045b 33static retro_log_printf_t log_cb;
2446536b 34static retro_video_refresh_t video_cb;
35static retro_input_poll_t input_poll_cb;
36static retro_input_state_t input_state_cb;
37static retro_environment_t environ_cb;
38static retro_audio_sample_batch_t audio_batch_cb;
39
2446536b 40#define VOUT_MAX_WIDTH 320
41#define VOUT_MAX_HEIGHT 240
42static void *vout_buf;
51c08950 43static int vout_width, vout_height, vout_offset;
2446536b 44
ed06ffd3
T		 45#ifdef _MSC_VER
46static short sndBuffer[2*44100/50];
47#else
2446536b 48static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
ed06ffd3 49#endif
2446536b 50
2446536b 51static void snd_write(int len);
52
53#ifdef _WIN32
54#define SLASH '\\'
55#else
56#define SLASH '/'
57#endif
58
59/* functions called by the core */
60
61void cache_flush_d_inval_i(void *start, void *end)
62{
63#ifdef __arm__
64#if defined(__BLACKBERRY_QNX__)
65 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
66#elif defined(__MACH__)
67 size_t len = (char *)end - (char *)start;
68 sys_dcache_flush(start, len);
69 sys_icache_invalidate(start, len);
70#else
71 __clear_cache(start, end);
72#endif
73#endif
74}
75
e8b61936 76#ifdef _WIN32
6f1133bc
T		 77/* mmap() replacement for Windows
78 *
79 * Author: Mike Frysinger <vapier@gentoo.org>
80 * Placed into the public domain
81 */
82
83/* References:
84 * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
85 * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
86 * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
87 * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
88 */
89
90#define PROT_READ 0x1
91#define PROT_WRITE 0x2
92/* This flag is only available in WinXP+ */
93#ifdef FILE_MAP_EXECUTE
94#define PROT_EXEC 0x4
95#else
96#define PROT_EXEC 0x0
97#define FILE_MAP_EXECUTE 0
98#endif
99
100#define MAP_SHARED 0x01
101#define MAP_PRIVATE 0x02
102#define MAP_ANONYMOUS 0x20
103#define MAP_ANON MAP_ANONYMOUS
104#define MAP_FAILED ((void *) -1)
105
106#ifdef __USE_FILE_OFFSET64
107# define DWORD_HI(x) (x >> 32)
108# define DWORD_LO(x) ((x) & 0xffffffff)
109#else
110# define DWORD_HI(x) (0)
111# define DWORD_LO(x) (x)
112#endif
113
114static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
2446536b 115{
ed06ffd3
T		 116 uint32_t flProtect, dwDesiredAccess;
117 off_t end;
118 HANDLE mmap_fd, h;
119 void *ret;
120
6f1133bc
T		 121 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
122 return MAP_FAILED;
123 if (fd == -1) {
124 if (!(flags & MAP_ANON) || offset)
125 return MAP_FAILED;
126 } else if (flags & MAP_ANON)
127 return MAP_FAILED;
128
6f1133bc
T		 129 if (prot & PROT_WRITE) {
130 if (prot & PROT_EXEC)
131 flProtect = PAGE_EXECUTE_READWRITE;
132 else
133 flProtect = PAGE_READWRITE;
134 } else if (prot & PROT_EXEC) {
135 if (prot & PROT_READ)
136 flProtect = PAGE_EXECUTE_READ;
137 else if (prot & PROT_EXEC)
138 flProtect = PAGE_EXECUTE;
139 } else
140 flProtect = PAGE_READONLY;
141
ed06ffd3
T		 142 end = length + offset;
143
6f1133bc
T		 144 if (fd == -1)
145 mmap_fd = INVALID_HANDLE_VALUE;
146 else
147 mmap_fd = (HANDLE)_get_osfhandle(fd);
148 h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
149 if (h == NULL)
150 return MAP_FAILED;
151
6f1133bc
T		 152 if (prot & PROT_WRITE)
153 dwDesiredAccess = FILE_MAP_WRITE;
154 else
155 dwDesiredAccess = FILE_MAP_READ;
156 if (prot & PROT_EXEC)
157 dwDesiredAccess |= FILE_MAP_EXECUTE;
158 if (flags & MAP_PRIVATE)
159 dwDesiredAccess |= FILE_MAP_COPY;
ed06ffd3 160 ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
6f1133bc
T		 161 if (ret == NULL) {
162 CloseHandle(h);
163 ret = MAP_FAILED;
164 }
165 return ret;
e8b61936 166}
2446536b 167
6f1133bc 168static void munmap(void *addr, size_t length)
e8b61936 169{
6f1133bc
T		 170 UnmapViewOfFile(addr);
171 /* ruh-ro, we leaked handle from CreateFileMapping() ... */
e8b61936 172}
f18d0e08 173#elif defined(NO_MMAP)
5345c2b9 174#define PROT_EXEC 0x04
f18d0e08 175#define MAP_FAILED 0
176#define PROT_READ 0
177#define PROT_WRITE 0
178#define MAP_PRIVATE 0
179#define MAP_ANONYMOUS 0
180
181void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
182{
183 return malloc(len);
184}
185
186void munmap(void *base_addr, size_t len)
187{
188 free(base_addr);
189}
190
191int mprotect(void *addr, size_t len, int prot)
192{
193 /* stub - not really needed at this point since this codepath has no dynarecs */
194 return 0;
195}
196
e8b61936 197#endif
8e5639bc 198
199#ifndef MAP_ANONYMOUS
200#define MAP_ANONYMOUS MAP_ANON
201#endif
202
e8b61936 203void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
204{
e8b61936 205 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
206 void *req, *ret;
207
208 req = (void *)addr;
209 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
210 if (ret == MAP_FAILED) {
f5d4045b 211 if (log_cb)
212 log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
e8b61936 213 return NULL;
214 }
215
216 if (addr != 0 && ret != (void *)addr) {
f5d4045b 217 if (log_cb)
218 log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
219 addr, ret);
e8b61936 220
221 if (is_fixed) {
222 munmap(ret, size);
223 return NULL;
224 }
225 }
2446536b 226
227 return ret;
228}
229
230void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
231{
8c8b7284 232#ifdef __linux__
2446536b 233 void *ret = mremap(ptr, oldsize, newsize, 0);
234 if (ret == MAP_FAILED)
235 return NULL;
236
237 return ret;
8c8b7284 238#else
239 void *tmp, *ret;
240 size_t preserve_size;
241
242 preserve_size = oldsize;
243 if (preserve_size > newsize)
244 preserve_size = newsize;
245 tmp = malloc(preserve_size);
246 if (tmp == NULL)
247 return NULL;
248 memcpy(tmp, ptr, preserve_size);
249
250 munmap(ptr, oldsize);
251 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
252 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
253 if (ret == MAP_FAILED) {
254 free(tmp);
255 return NULL;
256 }
257 memcpy(ret, tmp, preserve_size);
258 free(tmp);
259 return ret;
260#endif
2446536b 261}
262
263void plat_munmap(void *ptr, size_t size)
264{
265 if (ptr != NULL)
266 munmap(ptr, size);
267}
268
c25d78ee 269int plat_mem_set_exec(void *ptr, size_t size)
270{
e8b61936 271#ifdef _WIN32
272 int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
f5d4045b 273 if (ret == 0 && log_cb)
274 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
e8b61936 275#else
276 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
f5d4045b 277 if (ret != 0 && log_cb)
278 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
e8b61936 279#endif
c25d78ee 280 return ret;
281}
282
2446536b 283void emu_video_mode_change(int start_line, int line_count, int is_32cols)
284{
285 memset(vout_buf, 0, 320 * 240 * 2);
286 vout_width = is_32cols ? 256 : 320;
287 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
51c08950 288
289 vout_height = line_count;
290 vout_offset = vout_width * start_line;
2446536b 291}
292
293void emu_32x_startup(void)
294{
2446536b 295}
296
2446536b 297void lprintf(const char *fmt, ...)
298{
c681e48d 299 char buffer[256];
300 va_list ap;
301 va_start(ap, fmt);
302 vsprintf(buffer, fmt, ap);
f5d4045b 303 /* TODO - add 'level' param for warning/error messages? */
304 if (log_cb)
c681e48d 305 log_cb(RETRO_LOG_INFO, "%s\n", fmt);
2446536b 306}
307
2446536b 308/* libretro */
309void retro_set_environment(retro_environment_t cb)
310{
311 static const struct retro_variable vars[] = {
312 //{ "region", "Region; Auto|NTSC|PAL" },
531a8f38 313 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
314 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
27f190ea 315 { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
316 { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
b38bccea 317 { "picodrive_region", "Region; Auto|Japan NTSC|Japan PAL|US|Europe" },
0185b677 318#ifdef DRC_SH2
319 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
320#endif
2446536b 321 { NULL, NULL },
322 };
323
324 environ_cb = cb;
325
326 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
327}
328
329void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
330void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
331void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
332void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
333void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
334
335unsigned retro_api_version(void)
336{
337 return RETRO_API_VERSION;
338}
339
340void retro_set_controller_port_device(unsigned port, unsigned device)
341{
342}
343
344void retro_get_system_info(struct retro_system_info *info)
345{
346 memset(info, 0, sizeof(*info));
347 info->library_name = "PicoDrive";
348 info->library_version = VERSION;
53b2e51c 349 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
2446536b 350 info->need_fullpath = true;
351}
352
353void retro_get_system_av_info(struct retro_system_av_info *info)
354{
355 memset(info, 0, sizeof(*info));
356 info->timing.fps = Pico.m.pal ? 50 : 60;
357 info->timing.sample_rate = 44100;
358 info->geometry.base_width = 320;
51c08950 359 info->geometry.base_height = vout_height;
2446536b 360 info->geometry.max_width = VOUT_MAX_WIDTH;
361 info->geometry.max_height = VOUT_MAX_HEIGHT;
24a7ff72 362 info->geometry.aspect_ratio = 4.0f / 3.0f;
2446536b 363}
364
86b38dc4 365/* savestates */
366struct savestate_state {
367 const char *load_buf;
368 char *save_buf;
369 size_t size;
370 size_t pos;
371};
372
373size_t state_read(void *p, size_t size, size_t nmemb, void *file)
374{
375 struct savestate_state *state = file;
376 size_t bsize = size * nmemb;
377
378 if (state->pos + bsize > state->size) {
f5d4045b 379 if (log_cb)
380 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
381 state->pos + bsize, state->size);
86b38dc4 382 bsize = state->size - state->pos;
383 if ((int)bsize <= 0)
384 return 0;
385 }
386
387 memcpy(p, state->load_buf + state->pos, bsize);
388 state->pos += bsize;
389 return bsize;
390}
391
392size_t state_write(void *p, size_t size, size_t nmemb, void *file)
393{
394 struct savestate_state *state = file;
395 size_t bsize = size * nmemb;
396
397 if (state->pos + bsize > state->size) {
f5d4045b 398 if (log_cb)
399 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
400 state->pos + bsize, state->size);
86b38dc4 401 bsize = state->size - state->pos;
402 if ((int)bsize <= 0)
403 return 0;
404 }
405
406 memcpy(state->save_buf + state->pos, p, bsize);
407 state->pos += bsize;
408 return bsize;
409}
410
411size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
412{
413 struct savestate_state *state = file;
414 size_t bsize = size * nmemb;
415
416 state->pos += bsize;
417 return bsize;
418}
419
420size_t state_eof(void *file)
421{
422 struct savestate_state *state = file;
423
424 return state->pos >= state->size;
425}
426
427int state_fseek(void *file, long offset, int whence)
428{
429 struct savestate_state *state = file;
430
431 switch (whence) {
432 case SEEK_SET:
433 state->pos = offset;
434 break;
435 case SEEK_CUR:
436 state->pos += offset;
437 break;
438 case SEEK_END:
439 state->pos = state->size + offset;
440 break;
441 }
442 return (int)state->pos;
443}
444
445/* savestate sizes vary wildly depending if cd/32x or
446 * carthw is active, so run the whole thing to get size */
2446536b 447size_t retro_serialize_size(void)
448{
86b38dc4 449 struct savestate_state state = { 0, };
450 int ret;
451
452 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
453 if (ret != 0)
454 return 0;
455
456 return state.pos;
2446536b 457}
458
459bool retro_serialize(void *data, size_t size)
460{
86b38dc4 461 struct savestate_state state = { 0, };
462 int ret;
463
464 state.save_buf = data;
465 state.size = size;
466 state.pos = 0;
467
468 ret = PicoStateFP(&state, 1, NULL, state_write,
469 NULL, state_fseek);
470 return ret == 0;
2446536b 471}
472
473bool retro_unserialize(const void *data, size_t size)
474{
86b38dc4 475 struct savestate_state state = { 0, };
476 int ret;
477
478 state.load_buf = data;
479 state.size = size;
480 state.pos = 0;
481
482 ret = PicoStateFP(&state, 0, state_read, NULL,
483 state_eof, state_fseek);
484 return ret == 0;
2446536b 485}
486
487/* cheats - TODO */
488void retro_cheat_reset(void)
489{
490}
491
492void retro_cheat_set(unsigned index, bool enabled, const char *code)
493{
494}
495
496/* multidisk support */
497static bool disk_ejected;
498static unsigned int disk_current_index;
499static unsigned int disk_count;
500static struct disks_state {
501 char *fname;
502} disks[8];
503
504static bool disk_set_eject_state(bool ejected)
505{
506 // TODO?
507 disk_ejected = ejected;
508 return true;
509}
510
511static bool disk_get_eject_state(void)
512{
513 return disk_ejected;
514}
515
516static unsigned int disk_get_image_index(void)
517{
518 return disk_current_index;
519}
520
521static bool disk_set_image_index(unsigned int index)
522{
274fcc35 523 enum cd_img_type cd_type;
2446536b 524 int ret;
525
526 if (index >= sizeof(disks) / sizeof(disks[0]))
527 return false;
528
529 if (disks[index].fname == NULL) {
f5d4045b 530 if (log_cb)
531 log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
2446536b 532
533 // RetroArch specifies "no disk" with index == count,
534 // so don't fail here..
535 disk_current_index = index;
536 return true;
537 }
538
f5d4045b 539 if (log_cb)
540 log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
541 disks[index].fname);
2446536b 542
543 ret = -1;
544 cd_type = PicoCdCheck(disks[index].fname, NULL);
545 if (cd_type != CIT_NOT_CD)
274fcc35 546 ret = cdd_load(disks[index].fname, cd_type);
2446536b 547 if (ret != 0) {
f5d4045b 548 if (log_cb)
549 log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
2446536b 550 return 0;
551 }
552
553 disk_current_index = index;
554 return true;
555}
556
557static unsigned int disk_get_num_images(void)
558{
559 return disk_count;
560}
561
562static bool disk_replace_image_index(unsigned index,
563 const struct retro_game_info *info)
564{
565 bool ret = true;
566
567 if (index >= sizeof(disks) / sizeof(disks[0]))
568 return false;
569
570 if (disks[index].fname != NULL)
571 free(disks[index].fname);
572 disks[index].fname = NULL;
573
574 if (info != NULL) {
575 disks[index].fname = strdup(info->path);
576 if (index == disk_current_index)
577 ret = disk_set_image_index(index);
578 }
579
580 return ret;
581}
582
583static bool disk_add_image_index(void)
584{
585 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
586 return false;
587
588 disk_count++;
589 return true;
590}
591
592static struct retro_disk_control_callback disk_control = {
ed06ffd3
T		 593 disk_set_eject_state,
594 disk_get_eject_state,
595 disk_get_image_index,
596 disk_set_image_index,
597 disk_get_num_images,
598 disk_replace_image_index,
599 disk_add_image_index,
2446536b 600};
601
602static void disk_tray_open(void)
603{
f5d4045b 604 if (log_cb)
605 log_cb(RETRO_LOG_INFO, "cd tray open\n");
2446536b 606 disk_ejected = 1;
607}
608
609static void disk_tray_close(void)
610{
f5d4045b 611 if (log_cb)
612 log_cb(RETRO_LOG_INFO, "cd tray close\n");
2446536b 613 disk_ejected = 0;
614}
615
616
617static const char * const biosfiles_us[] = {
b08a2950 618 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
2446536b 619};
620static const char * const biosfiles_eu[] = {
b08a2950 621 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
2446536b 622};
623static const char * const biosfiles_jp[] = {
b08a2950 624 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
2446536b 625};
626
627static void make_system_path(char *buf, size_t buf_size,
628 const char *name, const char *ext)
629{
630 const char *dir = NULL;
631
632 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
633 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
634 }
635 else {
636 snprintf(buf, buf_size, "%s%s", name, ext);
637 }
638}
639
640static const char *find_bios(int *region, const char *cd_fname)
641{
642 const char * const *files;
643 static char path[256];
644 int i, count;
645 FILE *f = NULL;
646
647 if (*region == 4) { // US
648 files = biosfiles_us;
649 count = sizeof(biosfiles_us) / sizeof(char *);
650 } else if (*region == 8) { // EU
651 files = biosfiles_eu;
652 count = sizeof(biosfiles_eu) / sizeof(char *);
653 } else if (*region == 1 || *region == 2) {
654 files = biosfiles_jp;
655 count = sizeof(biosfiles_jp) / sizeof(char *);
656 } else {
657 return NULL;
658 }
659
660 for (i = 0; i < count; i++)
661 {
662 make_system_path(path, sizeof(path), files[i], ".bin");
663 f = fopen(path, "rb");
664 if (f != NULL)
665 break;
666
667 make_system_path(path, sizeof(path), files[i], ".zip");
668 f = fopen(path, "rb");
669 if (f != NULL)
670 break;
671 }
672
673 if (f != NULL) {
f5d4045b 674 if (log_cb)
675 log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
2446536b 676 fclose(f);
677 return path;
678 }
679
680 return NULL;
681}
682
683bool retro_load_game(const struct retro_game_info *info)
684{
685 enum media_type_e media_type;
686 static char carthw_path[256];
687 size_t i;
688
a1f2e1b1 689 struct retro_input_descriptor desc[] = {
690 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
691 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
692 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
693 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
694 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
695 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
696 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
697 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
698 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
699 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
700 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
701 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
702
703 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
704 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
705 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
706 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
707 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
708 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
709 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
710 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
711 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
712 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
713 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
714 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
715
716 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
717 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
718 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
719 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
720 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
721 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
722 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
723 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
724 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
725 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
726 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
727 { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
728
729 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
730 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
731 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
732 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
733 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
734 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
735 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
736 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
737 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
738 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
739 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
740 { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
741
742 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
743 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
744 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
745 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
746 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
747 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
748 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
749 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
750 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
751 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
752 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
753 { 4, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
754
755 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
756 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
757 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
758 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
759 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
760 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
761 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
762 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
763 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
764 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
765 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
766 { 5, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
767
768 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
769 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
770 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
771 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
772 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
773 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
774 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
775 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
776 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
777 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
778 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
779 { 6, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
780
781 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
782 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
783 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
784 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
785 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
786 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
787 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
788 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
789 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
790 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
791 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Mode" },
792 { 7, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
793
794 { 0 },
795 };
796
797 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
798
2446536b 799 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
800 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
f5d4045b 801 if (log_cb)
802 log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
2446536b 803 return false;
804 }
805
806 if (info == NULL || info->path == NULL) {
f5d4045b 807 if (log_cb)
808 log_cb(RETRO_LOG_ERROR, "info->path required\n");
2446536b 809 return false;
810 }
811
812 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
813 if (disks[i].fname != NULL) {
814 free(disks[i].fname);
815 disks[i].fname = NULL;
816 }
817 }
818
819 disk_current_index = 0;
820 disk_count = 1;
821 disks[0].fname = strdup(info->path);
822
823 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
824
825 media_type = PicoLoadMedia(info->path, carthw_path,
826 find_bios, NULL);
827
828 switch (media_type) {
829 case PM_BAD_DETECT:
f5d4045b 830 if (log_cb)
831 log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
2446536b 832 return false;
833 case PM_BAD_CD:
f5d4045b 834 if (log_cb)
835 log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
2446536b 836 return false;
837 case PM_BAD_CD_NO_BIOS:
f5d4045b 838 if (log_cb)
839 log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
2446536b 840 return false;
841 case PM_ERROR:
f5d4045b 842 if (log_cb)
843 log_cb(RETRO_LOG_ERROR, "Load error\n");
2446536b 844 return false;
845 default:
846 break;
847 }
848
849 PicoLoopPrepare();
850
851 PicoWriteSound = snd_write;
852 memset(sndBuffer, 0, sizeof(sndBuffer));
853 PsndOut = sndBuffer;
27f190ea 854 PsndRerate(0);
2446536b 855
856 return true;
857}
858
859bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
860{
861 return false;
862}
863
864void retro_unload_game(void)
865{
866}
867
868unsigned retro_get_region(void)
869{
870 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
871}
872
873void *retro_get_memory_data(unsigned id)
874{
875 if (id != RETRO_MEMORY_SAVE_RAM)
876 return NULL;
877
878 if (PicoAHW & PAHW_MCD)
879 return Pico_mcd->bram;
880 else
881 return SRam.data;
882}
883
884size_t retro_get_memory_size(unsigned id)
885{
0fd6751d 886 unsigned int i;
887 int sum;
888
2446536b 889 if (id != RETRO_MEMORY_SAVE_RAM)
890 return 0;
891
892 if (PicoAHW & PAHW_MCD)
893 // bram
894 return 0x2000;
0fd6751d 895
896 if (Pico.m.frame_count == 0)
2446536b 897 return SRam.size;
0fd6751d 898
899 // if game doesn't write to sram, don't report it to
900 // libretro so that RA doesn't write out zeroed .srm
901 for (i = 0, sum = 0; i < SRam.size; i++)
902 sum |= SRam.data[i];
903
904 return (sum != 0) ? SRam.size : 0;
2446536b 905}
906
907void retro_reset(void)
908{
909 PicoReset();
910}
911
912static const unsigned short retro_pico_map[] = {
ed06ffd3
T		 913 1 << GBTN_B,
914 1 << GBTN_A,
915 1 << GBTN_MODE,
916 1 << GBTN_START,
917 1 << GBTN_UP,
918 1 << GBTN_DOWN,
919 1 << GBTN_LEFT,
920 1 << GBTN_RIGHT,
921 1 << GBTN_C,
922 1 << GBTN_Y,
923 1 << GBTN_X,
924 1 << GBTN_Z,
2446536b 925};
926#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
927
928static void snd_write(int len)
929{
930 audio_batch_cb(PsndOut, len / 4);
931}
932
531a8f38 933static enum input_device input_name_to_val(const char *name)
934{
935 if (strcmp(name, "3 button pad") == 0)
936 return PICO_INPUT_PAD_3BTN;
937 if (strcmp(name, "6 button pad") == 0)
938 return PICO_INPUT_PAD_6BTN;
939 if (strcmp(name, "None") == 0)
940 return PICO_INPUT_NOTHING;
941
f5d4045b 942 if (log_cb)
943 log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
531a8f38 944 return PICO_INPUT_PAD_3BTN;
945}
946
947static void update_variables(void)
948{
949 struct retro_variable var;
950
951 var.value = NULL;
952 var.key = "picodrive_input1";
953 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
954 PicoSetInputDevice(0, input_name_to_val(var.value));
955
956 var.value = NULL;
957 var.key = "picodrive_input2";
958 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
959 PicoSetInputDevice(1, input_name_to_val(var.value));
0185b677 960
27f190ea 961 var.value = NULL;
962 var.key = "picodrive_sprlim";
963 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
964 if (strcmp(var.value, "enabled") == 0)
965 PicoOpt |= POPT_DIS_SPRITE_LIM;
966 else
967 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
968 }
969
970 var.value = NULL;
971 var.key = "picodrive_ramcart";
972 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
973 if (strcmp(var.value, "enabled") == 0)
974 PicoOpt |= POPT_EN_MCD_RAMCART;
975 else
976 PicoOpt &= ~POPT_EN_MCD_RAMCART;
977 }
978
b38bccea
O		 979 var.value = NULL;
980 var.key = "picodrive_region";
981 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
982 if (strcmp(var.value, "Auto") == 0)
983 PicoRegionOverride = 0;
984 else if (strcmp(var.value, "Japan NTSC") == 0)
985 PicoRegionOverride = 1;
986 else if (strcmp(var.value, "Japan PAL") == 0)
987 PicoRegionOverride = 2;
988 else if (strcmp(var.value, "US") == 0)
989 PicoRegionOverride = 4;
990 else if (strcmp(var.value, "Europe") == 0)
991 PicoRegionOverride = 8;
992 }
993
0185b677 994#ifdef DRC_SH2
995 var.value = NULL;
996 var.key = "picodrive_drc";
997 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
998 if (strcmp(var.value, "enabled") == 0)
999 PicoOpt |= POPT_EN_DRC;
1000 else
1001 PicoOpt &= ~POPT_EN_DRC;
1002 }
1003#endif
531a8f38 1004}
1005
2446536b 1006void retro_run(void)
1007{
1008 bool updated = false;
1009 int pad, i;
1010
1011 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
531a8f38 1012 update_variables();
2446536b 1013
1014 input_poll_cb();
1015
1016 PicoPad[0] = PicoPad[1] = 0;
1017 for (pad = 0; pad < 2; pad++)
1018 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
1019 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
1020 PicoPad[pad] |= retro_pico_map[i];
1021
1022 PicoFrame();
1023
51c08950 1024 video_cb((short *)vout_buf + vout_offset,
1025 vout_width, vout_height, vout_width * 2);
2446536b 1026}
1027
2f832b7f 1028static void check_system_specs(void)
1029{
1030 /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */
1031 unsigned level = 5;
1032 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1033}
1034
2446536b 1035void retro_init(void)
1036{
f5d4045b 1037 struct retro_log_callback log;
2446536b 1038 int level;
1039
2446536b 1040 level = 0;
1041 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1042
c681e48d 1043 if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
f5d4045b 1044 log_cb = log.log;
c681e48d 1045 else
1046 log_cb = NULL;
f5d4045b 1047
2446536b 1048 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
1049
1050 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
720bfc5d 1051 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
1052 | POPT_EN_32X|POPT_EN_PWM
1053 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
1054#ifdef __arm__
92dfd9af 1055 PicoOpt |= POPT_EN_DRC;
720bfc5d 1056#endif
2446536b 1057 PsndRate = 44100;
1058 PicoAutoRgnOrder = 0x184; // US, EU, JP
2446536b 1059
2446536b 1060 vout_width = 320;
1061 vout_height = 240;
1062 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
1063
1064 PicoInit();
41946d70 1065 PicoDrawSetOutFormat(PDF_RGB555, 0);
2446536b 1066 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
1067
1068 //PicoMessage = plat_status_msg_busy_next;
1069 PicoMCDopenTray = disk_tray_open;
1070 PicoMCDcloseTray = disk_tray_close;
531a8f38 1071
1072 update_variables();
2446536b 1073}
1074
1075void retro_deinit(void)
1076{
1077 PicoExit();
1078}
fast MegaDrive/MegaCD/32X emulator