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