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Fix remaining bugs and fix indentation
[picodrive.git] / platform / libretro.c
CommitLineData
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;
51c08950 42static int vout_width, vout_height, vout_offset;
2446536b 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);
51c08950 254
255 vout_height = line_count;
256 vout_offset = vout_width * start_line;
2446536b 257}
258
259void emu_32x_startup(void)
260{
2446536b 261}
262
263#ifndef ANDROID
264
265void lprintf(const char *fmt, ...)
266{
267 va_list list;
268
269 va_start(list, fmt);
270 fprintf(emu_log, "PicoDrive: ");
271 vfprintf(emu_log, fmt, list);
272 va_end(list);
273 fflush(emu_log);
274}
275
276#else
277
278#include <android/log.h>
279
280void lprintf(const char *fmt, ...)
281{
282 va_list list;
283
284 va_start(list, fmt);
285 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
286 va_end(list);
287}
288
289#endif
290
291/* libretro */
292void retro_set_environment(retro_environment_t cb)
293{
294 static const struct retro_variable vars[] = {
295 //{ "region", "Region; Auto|NTSC|PAL" },
531a8f38 296 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
297 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
27f190ea 298 { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
299 { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
0185b677 300#ifdef DRC_SH2
301 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
302#endif
2446536b 303 { NULL, NULL },
304 };
305
306 environ_cb = cb;
307
308 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
309}
310
311void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
312void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
313void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
314void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
315void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
316
317unsigned retro_api_version(void)
318{
319 return RETRO_API_VERSION;
320}
321
322void retro_set_controller_port_device(unsigned port, unsigned device)
323{
324}
325
326void retro_get_system_info(struct retro_system_info *info)
327{
328 memset(info, 0, sizeof(*info));
329 info->library_name = "PicoDrive";
330 info->library_version = VERSION;
53b2e51c 331 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
2446536b 332 info->need_fullpath = true;
333}
334
335void retro_get_system_av_info(struct retro_system_av_info *info)
336{
337 memset(info, 0, sizeof(*info));
338 info->timing.fps = Pico.m.pal ? 50 : 60;
339 info->timing.sample_rate = 44100;
340 info->geometry.base_width = 320;
51c08950 341 info->geometry.base_height = vout_height;
2446536b 342 info->geometry.max_width = VOUT_MAX_WIDTH;
343 info->geometry.max_height = VOUT_MAX_HEIGHT;
51c08950 344 info->geometry.aspect_ratio = 0.0f;
2446536b 345}
346
86b38dc4 347/* savestates */
348struct savestate_state {
349 const char *load_buf;
350 char *save_buf;
351 size_t size;
352 size_t pos;
353};
354
355size_t state_read(void *p, size_t size, size_t nmemb, void *file)
356{
357 struct savestate_state *state = file;
358 size_t bsize = size * nmemb;
359
360 if (state->pos + bsize > state->size) {
361 lprintf("savestate error: %u/%u\n",
362 state->pos + bsize, state->size);
363 bsize = state->size - state->pos;
364 if ((int)bsize <= 0)
365 return 0;
366 }
367
368 memcpy(p, state->load_buf + state->pos, bsize);
369 state->pos += bsize;
370 return bsize;
371}
372
373size_t state_write(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) {
379 lprintf("savestate error: %u/%u\n",
380 state->pos + bsize, state->size);
381 bsize = state->size - state->pos;
382 if ((int)bsize <= 0)
383 return 0;
384 }
385
386 memcpy(state->save_buf + state->pos, p, bsize);
387 state->pos += bsize;
388 return bsize;
389}
390
391size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
392{
393 struct savestate_state *state = file;
394 size_t bsize = size * nmemb;
395
396 state->pos += bsize;
397 return bsize;
398}
399
400size_t state_eof(void *file)
401{
402 struct savestate_state *state = file;
403
404 return state->pos >= state->size;
405}
406
407int state_fseek(void *file, long offset, int whence)
408{
409 struct savestate_state *state = file;
410
411 switch (whence) {
412 case SEEK_SET:
413 state->pos = offset;
414 break;
415 case SEEK_CUR:
416 state->pos += offset;
417 break;
418 case SEEK_END:
419 state->pos = state->size + offset;
420 break;
421 }
422 return (int)state->pos;
423}
424
425/* savestate sizes vary wildly depending if cd/32x or
426 * carthw is active, so run the whole thing to get size */
2446536b 427size_t retro_serialize_size(void)
428{
86b38dc4 429 struct savestate_state state = { 0, };
430 int ret;
431
432 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
433 if (ret != 0)
434 return 0;
435
436 return state.pos;
2446536b 437}
438
439bool retro_serialize(void *data, size_t size)
440{
86b38dc4 441 struct savestate_state state = { 0, };
442 int ret;
443
444 state.save_buf = data;
445 state.size = size;
446 state.pos = 0;
447
448 ret = PicoStateFP(&state, 1, NULL, state_write,
449 NULL, state_fseek);
450 return ret == 0;
2446536b 451}
452
453bool retro_unserialize(const void *data, size_t size)
454{
86b38dc4 455 struct savestate_state state = { 0, };
456 int ret;
457
458 state.load_buf = data;
459 state.size = size;
460 state.pos = 0;
461
462 ret = PicoStateFP(&state, 0, state_read, NULL,
463 state_eof, state_fseek);
464 return ret == 0;
2446536b 465}
466
467/* cheats - TODO */
468void retro_cheat_reset(void)
469{
470}
471
472void retro_cheat_set(unsigned index, bool enabled, const char *code)
473{
474}
475
476/* multidisk support */
477static bool disk_ejected;
478static unsigned int disk_current_index;
479static unsigned int disk_count;
480static struct disks_state {
481 char *fname;
482} disks[8];
483
484static bool disk_set_eject_state(bool ejected)
485{
486 // TODO?
487 disk_ejected = ejected;
488 return true;
489}
490
491static bool disk_get_eject_state(void)
492{
493 return disk_ejected;
494}
495
496static unsigned int disk_get_image_index(void)
497{
498 return disk_current_index;
499}
500
501static bool disk_set_image_index(unsigned int index)
502{
274fcc35 503 enum cd_img_type cd_type;
2446536b 504 int ret;
505
506 if (index >= sizeof(disks) / sizeof(disks[0]))
507 return false;
508
509 if (disks[index].fname == NULL) {
510 lprintf("missing disk #%u\n", index);
511
512 // RetroArch specifies "no disk" with index == count,
513 // so don't fail here..
514 disk_current_index = index;
515 return true;
516 }
517
518 lprintf("switching to disk %u: \"%s\"\n", index,
519 disks[index].fname);
520
521 ret = -1;
522 cd_type = PicoCdCheck(disks[index].fname, NULL);
523 if (cd_type != CIT_NOT_CD)
274fcc35 524 ret = cdd_load(disks[index].fname, cd_type);
2446536b 525 if (ret != 0) {
526 lprintf("Load failed, invalid CD image?\n");
527 return 0;
528 }
529
530 disk_current_index = index;
531 return true;
532}
533
534static unsigned int disk_get_num_images(void)
535{
536 return disk_count;
537}
538
539static bool disk_replace_image_index(unsigned index,
540 const struct retro_game_info *info)
541{
542 bool ret = true;
543
544 if (index >= sizeof(disks) / sizeof(disks[0]))
545 return false;
546
547 if (disks[index].fname != NULL)
548 free(disks[index].fname);
549 disks[index].fname = NULL;
550
551 if (info != NULL) {
552 disks[index].fname = strdup(info->path);
553 if (index == disk_current_index)
554 ret = disk_set_image_index(index);
555 }
556
557 return ret;
558}
559
560static bool disk_add_image_index(void)
561{
562 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
563 return false;
564
565 disk_count++;
566 return true;
567}
568
569static struct retro_disk_control_callback disk_control = {
570 .set_eject_state = disk_set_eject_state,
571 .get_eject_state = disk_get_eject_state,
572 .get_image_index = disk_get_image_index,
573 .set_image_index = disk_set_image_index,
574 .get_num_images = disk_get_num_images,
575 .replace_image_index = disk_replace_image_index,
576 .add_image_index = disk_add_image_index,
577};
578
579static void disk_tray_open(void)
580{
581 lprintf("cd tray open\n");
582 disk_ejected = 1;
583}
584
585static void disk_tray_close(void)
586{
587 lprintf("cd tray close\n");
588 disk_ejected = 0;
589}
590
591
592static const char * const biosfiles_us[] = {
b08a2950 593 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
2446536b 594};
595static const char * const biosfiles_eu[] = {
b08a2950 596 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
2446536b 597};
598static const char * const biosfiles_jp[] = {
b08a2950 599 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
2446536b 600};
601
602static void make_system_path(char *buf, size_t buf_size,
603 const char *name, const char *ext)
604{
605 const char *dir = NULL;
606
607 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
608 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
609 }
610 else {
611 snprintf(buf, buf_size, "%s%s", name, ext);
612 }
613}
614
615static const char *find_bios(int *region, const char *cd_fname)
616{
617 const char * const *files;
618 static char path[256];
619 int i, count;
620 FILE *f = NULL;
621
622 if (*region == 4) { // US
623 files = biosfiles_us;
624 count = sizeof(biosfiles_us) / sizeof(char *);
625 } else if (*region == 8) { // EU
626 files = biosfiles_eu;
627 count = sizeof(biosfiles_eu) / sizeof(char *);
628 } else if (*region == 1 || *region == 2) {
629 files = biosfiles_jp;
630 count = sizeof(biosfiles_jp) / sizeof(char *);
631 } else {
632 return NULL;
633 }
634
635 for (i = 0; i < count; i++)
636 {
637 make_system_path(path, sizeof(path), files[i], ".bin");
638 f = fopen(path, "rb");
639 if (f != NULL)
640 break;
641
642 make_system_path(path, sizeof(path), files[i], ".zip");
643 f = fopen(path, "rb");
644 if (f != NULL)
645 break;
646 }
647
648 if (f != NULL) {
649 lprintf("using bios: %s\n", path);
650 fclose(f);
651 return path;
652 }
653
654 return NULL;
655}
656
657bool retro_load_game(const struct retro_game_info *info)
658{
659 enum media_type_e media_type;
660 static char carthw_path[256];
661 size_t i;
662
663 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
664 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
531a8f38 665 lprintf("RGB565 support required, sorry\n");
2446536b 666 return false;
667 }
668
669 if (info == NULL || info->path == NULL) {
670 lprintf("info->path required\n");
671 return false;
672 }
673
674 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
675 if (disks[i].fname != NULL) {
676 free(disks[i].fname);
677 disks[i].fname = NULL;
678 }
679 }
680
681 disk_current_index = 0;
682 disk_count = 1;
683 disks[0].fname = strdup(info->path);
684
685 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
686
687 media_type = PicoLoadMedia(info->path, carthw_path,
688 find_bios, NULL);
689
690 switch (media_type) {
691 case PM_BAD_DETECT:
692 lprintf("Failed to detect ROM/CD image type.\n");
693 return false;
694 case PM_BAD_CD:
695 lprintf("Invalid CD image\n");
696 return false;
697 case PM_BAD_CD_NO_BIOS:
698 lprintf("Missing BIOS\n");
699 return false;
700 case PM_ERROR:
701 lprintf("Load error\n");
702 return false;
703 default:
704 break;
705 }
706
707 PicoLoopPrepare();
708
709 PicoWriteSound = snd_write;
710 memset(sndBuffer, 0, sizeof(sndBuffer));
711 PsndOut = sndBuffer;
27f190ea 712 PsndRerate(0);
2446536b 713
714 return true;
715}
716
717bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
718{
719 return false;
720}
721
722void retro_unload_game(void)
723{
724}
725
726unsigned retro_get_region(void)
727{
728 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
729}
730
731void *retro_get_memory_data(unsigned id)
732{
733 if (id != RETRO_MEMORY_SAVE_RAM)
734 return NULL;
735
736 if (PicoAHW & PAHW_MCD)
737 return Pico_mcd->bram;
738 else
739 return SRam.data;
740}
741
742size_t retro_get_memory_size(unsigned id)
743{
0fd6751d 744 unsigned int i;
745 int sum;
746
2446536b 747 if (id != RETRO_MEMORY_SAVE_RAM)
748 return 0;
749
750 if (PicoAHW & PAHW_MCD)
751 // bram
752 return 0x2000;
0fd6751d 753
754 if (Pico.m.frame_count == 0)
2446536b 755 return SRam.size;
0fd6751d 756
757 // if game doesn't write to sram, don't report it to
758 // libretro so that RA doesn't write out zeroed .srm
759 for (i = 0, sum = 0; i < SRam.size; i++)
760 sum |= SRam.data[i];
761
762 return (sum != 0) ? SRam.size : 0;
2446536b 763}
764
765void retro_reset(void)
766{
767 PicoReset();
768}
769
770static const unsigned short retro_pico_map[] = {
771 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
772 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
773 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
774 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
775 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
776 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
777 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
778 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
779 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
780 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
781 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
782 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
783};
784#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
785
786static void snd_write(int len)
787{
788 audio_batch_cb(PsndOut, len / 4);
789}
790
531a8f38 791static enum input_device input_name_to_val(const char *name)
792{
793 if (strcmp(name, "3 button pad") == 0)
794 return PICO_INPUT_PAD_3BTN;
795 if (strcmp(name, "6 button pad") == 0)
796 return PICO_INPUT_PAD_6BTN;
797 if (strcmp(name, "None") == 0)
798 return PICO_INPUT_NOTHING;
799
800 lprintf("invalid picodrive_input: '%s'\n", name);
801 return PICO_INPUT_PAD_3BTN;
802}
803
804static void update_variables(void)
805{
806 struct retro_variable var;
807
808 var.value = NULL;
809 var.key = "picodrive_input1";
810 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
811 PicoSetInputDevice(0, input_name_to_val(var.value));
812
813 var.value = NULL;
814 var.key = "picodrive_input2";
815 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
816 PicoSetInputDevice(1, input_name_to_val(var.value));
0185b677 817
27f190ea 818 var.value = NULL;
819 var.key = "picodrive_sprlim";
820 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
821 if (strcmp(var.value, "enabled") == 0)
822 PicoOpt |= POPT_DIS_SPRITE_LIM;
823 else
824 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
825 }
826
827 var.value = NULL;
828 var.key = "picodrive_ramcart";
829 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
830 if (strcmp(var.value, "enabled") == 0)
831 PicoOpt |= POPT_EN_MCD_RAMCART;
832 else
833 PicoOpt &= ~POPT_EN_MCD_RAMCART;
834 }
835
0185b677 836#ifdef DRC_SH2
837 var.value = NULL;
838 var.key = "picodrive_drc";
839 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
840 if (strcmp(var.value, "enabled") == 0)
841 PicoOpt |= POPT_EN_DRC;
842 else
843 PicoOpt &= ~POPT_EN_DRC;
844 }
845#endif
531a8f38 846}
847
2446536b 848void retro_run(void)
849{
850 bool updated = false;
851 int pad, i;
852
853 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
531a8f38 854 update_variables();
2446536b 855
856 input_poll_cb();
857
858 PicoPad[0] = PicoPad[1] = 0;
859 for (pad = 0; pad < 2; pad++)
860 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
861 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
862 PicoPad[pad] |= retro_pico_map[i];
863
864 PicoFrame();
865
51c08950 866 video_cb((short *)vout_buf + vout_offset,
867 vout_width, vout_height, vout_width * 2);
2446536b 868}
869
870void retro_init(void)
871{
872 int level;
873
874#ifdef IOS
875 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
876 if (emu_log == NULL)
877 emu_log = fopen("PicoDrive.log", "w");
878 if (emu_log == NULL)
879#endif
880 emu_log = stdout;
881
882 level = 0;
883 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
884
885 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
886
887 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
720bfc5d 888 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
889 | POPT_EN_32X|POPT_EN_PWM
890 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
891#ifdef __arm__
92dfd9af 892 PicoOpt |= POPT_EN_DRC;
720bfc5d 893#endif
2446536b 894 PsndRate = 44100;
895 PicoAutoRgnOrder = 0x184; // US, EU, JP
2446536b 896
2446536b 897 vout_width = 320;
898 vout_height = 240;
899 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
900
901 PicoInit();
41946d70 902 PicoDrawSetOutFormat(PDF_RGB555, 0);
2446536b 903 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
904
905 //PicoMessage = plat_status_msg_busy_next;
906 PicoMCDopenTray = disk_tray_open;
907 PicoMCDcloseTray = disk_tray_close;
531a8f38 908
909 update_variables();
2446536b 910}
911
912void retro_deinit(void)
913{
914 PicoExit();
915}
fast MegaDrive/MegaCD/32X emulator