src/platform/libretro/libretro.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "libretro.h"
7
8#include <mgba-util/common.h>
9
10#include <mgba/core/blip_buf.h>
11#include <mgba/core/cheats.h>
12#include <mgba/core/core.h>
13#include <mgba/core/log.h>
14#include <mgba/core/serialize.h>
15#include <mgba/core/version.h>
16#ifdef M_CORE_GB
17#include <mgba/gb/core.h>
18#include <mgba/internal/gb/gb.h>
19#include <mgba/internal/gb/mbc.h>
20#endif
21#ifdef M_CORE_GBA
22#include <mgba/gba/core.h>
23#include <mgba/gba/interface.h>
24#include <mgba/internal/gba/gba.h>
25#endif
26#include <mgba-util/memory.h>
27#include <mgba-util/vfs.h>
28
29#define SAMPLES 1024
30#define RUMBLE_PWM 35
31
32static retro_environment_t environCallback;
33static retro_video_refresh_t videoCallback;
34static retro_audio_sample_batch_t audioCallback;
35static retro_input_poll_t inputPollCallback;
36static retro_input_state_t inputCallback;
37static retro_log_printf_t logCallback;
38static retro_set_rumble_state_t rumbleCallback;
39
40static void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args);
41
42static void _postAudioBuffer(struct mAVStream*, blip_t* left, blip_t* right);
43static void _setRumble(struct mRumble* rumble, int enable);
44static uint8_t _readLux(struct GBALuminanceSource* lux);
45static void _updateLux(struct GBALuminanceSource* lux);
46static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch);
47static void _startImage(struct mImageSource*, unsigned w, unsigned h, int colorFormats);
48static void _stopImage(struct mImageSource*);
49static void _requestImage(struct mImageSource*, const void** buffer, size_t* stride, enum mColorFormat* colorFormat);
50
51static struct mCore* core;
52static void* outputBuffer;
53static void* data;
54static size_t dataSize;
55static void* savedata;
56static struct mAVStream stream;
57static int rumbleUp;
58static int rumbleDown;
59static struct mRumble rumble;
60static struct GBALuminanceSource lux;
61static int luxLevel;
62static struct mLogger logger;
63static struct retro_camera_callback cam;
64static struct mImageSource imageSource;
65static uint32_t* camData = NULL;
66static unsigned camWidth;
67static unsigned camHeight;
68static unsigned imcapWidth;
69static unsigned imcapHeight;
70static size_t camStride;
71
72static void _reloadSettings(void) {
73 struct mCoreOptions opts = {
74 .useBios = true,
75 .volume = 0x100,
76 };
77
78 struct retro_variable var;
79 enum GBModel model;
80 const char* modelName;
81
82 var.key = "mgba_gb_model";
83 var.value = 0;
84 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
85 if (strcmp(var.value, "Game Boy") == 0) {
86 model = GB_MODEL_DMG;
87 } else if (strcmp(var.value, "Super Game Boy") == 0) {
88 model = GB_MODEL_SGB;
89 } else if (strcmp(var.value, "Game Boy Color") == 0) {
90 model = GB_MODEL_CGB;
91 } else if (strcmp(var.value, "Game Boy Advance") == 0) {
92 model = GB_MODEL_AGB;
93 } else {
94 model = GB_MODEL_AUTODETECT;
95 }
96
97 modelName = GBModelToName(model);
98 mCoreConfigSetDefaultValue(&core->config, "gb.model", modelName);
99 mCoreConfigSetDefaultValue(&core->config, "sgb.model", modelName);
100 mCoreConfigSetDefaultValue(&core->config, "cgb.model", modelName);
101 }
102
103 var.key = "mgba_use_bios";
104 var.value = 0;
105 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
106 opts.useBios = strcmp(var.value, "ON") == 0;
107 }
108
109 var.key = "mgba_skip_bios";
110 var.value = 0;
111 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
112 opts.skipBios = strcmp(var.value, "ON") == 0;
113 }
114
115 var.key = "mgba_sgb_borders";
116 var.value = 0;
117 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
118 if (strcmp(var.value, "ON") == 0) {
119 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", true);
120 } else {
121 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", false);
122 }
123 }
124
125 var.key = "mgba_idle_optimization";
126 var.value = 0;
127 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
128 if (strcmp(var.value, "Don't Remove") == 0) {
129 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
130 } else if (strcmp(var.value, "Remove Known") == 0) {
131 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
132 } else if (strcmp(var.value, "Detect and Remove") == 0) {
133 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
134 }
135 }
136
137 var.key = "mgba_frameskip";
138 var.value = 0;
139 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
140 opts.frameskip = strtol(var.value, NULL, 10);
141
142 }
143
144 mCoreConfigLoadDefaults(&core->config, &opts);
145 mCoreLoadConfig(core);
146}
147
148unsigned retro_api_version(void) {
149 return RETRO_API_VERSION;
150}
151
152void retro_set_environment(retro_environment_t env) {
153 environCallback = env;
154
155 struct retro_variable vars[] = {
156 { "mgba_solar_sensor_level", "Solar sensor level; 0|1|2|3|4|5|6|7|8|9|10" },
157 { "mgba_allow_opposing_directions", "Allow opposing directional input; OFF|ON" },
158 { "mgba_gb_model", "Game Boy model (requires restart); Autodetect|Game Boy|Super Game Boy|Game Boy Color|Game Boy Advance" },
159 { "mgba_use_bios", "Use BIOS file if found (requires restart); ON|OFF" },
160 { "mgba_skip_bios", "Skip BIOS intro (requires restart); OFF|ON" },
161 { "mgba_sgb_borders", "Use Super Game Boy borders (requires restart); ON|OFF" },
162 { "mgba_idle_optimization", "Idle loop removal; Remove Known|Detect and Remove|Don't Remove" },
163 { "mgba_frameskip", "Frameskip; 0|1|2|3|4|5|6|7|8|9|10" },
164 { 0, 0 }
165 };
166
167 environCallback(RETRO_ENVIRONMENT_SET_VARIABLES, vars);
168}
169
170void retro_set_video_refresh(retro_video_refresh_t video) {
171 videoCallback = video;
172}
173
174void retro_set_audio_sample(retro_audio_sample_t audio) {
175 UNUSED(audio);
176}
177
178void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
179 audioCallback = audioBatch;
180}
181
182void retro_set_input_poll(retro_input_poll_t inputPoll) {
183 inputPollCallback = inputPoll;
184}
185
186void retro_set_input_state(retro_input_state_t input) {
187 inputCallback = input;
188}
189
190void retro_get_system_info(struct retro_system_info* info) {
191 info->need_fullpath = false;
192 info->valid_extensions = "gba|gb|gbc";
193 info->library_version = projectVersion;
194 info->library_name = projectName;
195 info->block_extract = false;
196}
197
198void retro_get_system_av_info(struct retro_system_av_info* info) {
199 unsigned width, height;
200 core->desiredVideoDimensions(core, &width, &height);
201 info->geometry.base_width = width;
202 info->geometry.base_height = height;
203#ifdef M_CORE_GB
204 if (core->platform(core) == PLATFORM_GB) {
205 info->geometry.max_width = 256;
206 info->geometry.max_height = 224;
207 } else
208#endif
209 {
210 info->geometry.max_width = width;
211 info->geometry.max_height = height;
212 }
213
214 info->geometry.aspect_ratio = width / (double) height;
215 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
216 info->timing.sample_rate = 32768;
217}
218
219void retro_init(void) {
220 enum retro_pixel_format fmt;
221#ifdef COLOR_16_BIT
222#ifdef COLOR_5_6_5
223 fmt = RETRO_PIXEL_FORMAT_RGB565;
224#else
225#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
226 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
227#endif
228#else
229#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
230 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
231#endif
232 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
233
234 struct retro_input_descriptor inputDescriptors[] = {
235 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
236 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
237 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
238 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
239 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
240 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
241 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
242 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
243 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
244 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
245 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
246 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
247 { 0 }
248 };
249 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
250
251 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
252
253 struct retro_rumble_interface rumbleInterface;
254 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
255 rumbleCallback = rumbleInterface.set_rumble_state;
256 rumble.setRumble = _setRumble;
257 } else {
258 rumbleCallback = 0;
259 }
260
261 luxLevel = 0;
262 lux.readLuminance = _readLux;
263 lux.sample = _updateLux;
264 _updateLux(&lux);
265
266 struct retro_log_callback log;
267 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
268 logCallback = log.log;
269 } else {
270 logCallback = 0;
271 }
272 logger.log = GBARetroLog;
273 mLogSetDefaultLogger(&logger);
274
275 stream.videoDimensionsChanged = 0;
276 stream.postAudioFrame = 0;
277 stream.postAudioBuffer = _postAudioBuffer;
278 stream.postVideoFrame = 0;
279
280 imageSource.startRequestImage = _startImage;
281 imageSource.stopRequestImage = _stopImage;
282 imageSource.requestImage = _requestImage;
283}
284
285void retro_deinit(void) {
286 free(outputBuffer);
287}
288
289void retro_run(void) {
290 uint16_t keys;
291 inputPollCallback();
292
293 bool updated = false;
294 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
295 struct retro_variable var = {
296 .key = "mgba_allow_opposing_directions",
297 .value = 0
298 };
299 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
300 struct GBA* gba = core->board;
301 struct GB* gb = core->board;
302 switch (core->platform(core)) {
303 case PLATFORM_GBA:
304 gba->allowOpposingDirections = strcmp(var.value, "yes") == 0;
305 break;
306 case PLATFORM_GB:
307 gb->allowOpposingDirections = strcmp(var.value, "yes") == 0;
308 break;
309 default:
310 break;
311 }
312 }
313
314 var.key = "mgba_frameskip";
315 var.value = 0;
316 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
317 mCoreConfigSetUIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
318 mCoreLoadConfig(core);
319 }
320 }
321
322 keys = 0;
323 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
324 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
325 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
326 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
327 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
328 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
329 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
330 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
331 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
332 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
333 core->setKeys(core, keys);
334
335 static bool wasAdjustingLux = false;
336 if (wasAdjustingLux) {
337 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
338 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
339 } else {
340 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
341 ++luxLevel;
342 if (luxLevel > 10) {
343 luxLevel = 10;
344 }
345 wasAdjustingLux = true;
346 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
347 --luxLevel;
348 if (luxLevel < 0) {
349 luxLevel = 0;
350 }
351 wasAdjustingLux = true;
352 }
353 }
354
355 core->runFrame(core);
356 unsigned width, height;
357 core->desiredVideoDimensions(core, &width, &height);
358 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
359
360 if (rumbleCallback) {
361 if (rumbleUp) {
362 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
363 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
364 } else {
365 rumbleCallback(0, RETRO_RUMBLE_STRONG, 0);
366 rumbleCallback(0, RETRO_RUMBLE_WEAK, 0);
367 }
368 rumbleUp = 0;
369 rumbleDown = 0;
370 }
371}
372
373static void _setupMaps(struct mCore* core) {
374#ifdef M_CORE_GBA
375 if (core->platform(core) == PLATFORM_GBA) {
376 struct GBA* gba = core->board;
377 struct retro_memory_descriptor descs[11];
378 struct retro_memory_map mmaps;
379 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
380
381 memset(descs, 0, sizeof(descs));
382 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
383
384 /* Map internal working RAM */
385 descs[0].ptr = gba->memory.iwram;
386 descs[0].start = BASE_WORKING_IRAM;
387 descs[0].len = SIZE_WORKING_IRAM;
388 descs[0].select = 0xFF000000;
389
390 /* Map working RAM */
391 descs[1].ptr = gba->memory.wram;
392 descs[1].start = BASE_WORKING_RAM;
393 descs[1].len = SIZE_WORKING_RAM;
394 descs[1].select = 0xFF000000;
395
396 /* Map save RAM */
397 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
398 descs[2].ptr = savedataSize ? savedata : NULL;
399 descs[2].start = BASE_CART_SRAM;
400 descs[2].len = savedataSize;
401
402 /* Map ROM */
403 descs[3].ptr = gba->memory.rom;
404 descs[3].start = BASE_CART0;
405 descs[3].len = romSize;
406 descs[3].flags = RETRO_MEMDESC_CONST;
407
408 descs[4].ptr = gba->memory.rom;
409 descs[4].start = BASE_CART1;
410 descs[4].len = romSize;
411 descs[4].flags = RETRO_MEMDESC_CONST;
412
413 descs[5].ptr = gba->memory.rom;
414 descs[5].start = BASE_CART2;
415 descs[5].len = romSize;
416 descs[5].flags = RETRO_MEMDESC_CONST;
417
418 /* Map BIOS */
419 descs[6].ptr = gba->memory.bios;
420 descs[6].start = BASE_BIOS;
421 descs[6].len = SIZE_BIOS;
422 descs[6].flags = RETRO_MEMDESC_CONST;
423
424 /* Map VRAM */
425 descs[7].ptr = gba->video.vram;
426 descs[7].start = BASE_VRAM;
427 descs[7].len = SIZE_VRAM;
428 descs[7].select = 0xFF000000;
429
430 /* Map palette RAM */
431 descs[8].ptr = gba->video.palette;
432 descs[8].start = BASE_PALETTE_RAM;
433 descs[8].len = SIZE_PALETTE_RAM;
434 descs[8].select = 0xFF000000;
435
436 /* Map OAM */
437 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
438 descs[9].start = BASE_OAM;
439 descs[9].len = SIZE_OAM;
440 descs[9].select = 0xFF000000;
441
442 /* Map mmapped I/O */
443 descs[10].ptr = gba->memory.io;
444 descs[10].start = BASE_IO;
445 descs[10].len = SIZE_IO;
446
447 mmaps.descriptors = descs;
448 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
449
450 bool yes = true;
451 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
452 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
453 }
454#endif
455}
456
457void retro_reset(void) {
458 core->reset(core);
459 _setupMaps(core);
460
461 rumbleUp = 0;
462 rumbleDown = 0;
463}
464
465bool retro_load_game(const struct retro_game_info* game) {
466 struct VFile* rom;
467 if (game->data) {
468 data = anonymousMemoryMap(game->size);
469 dataSize = game->size;
470 memcpy(data, game->data, game->size);
471 rom = VFileFromMemory(data, game->size);
472 } else {
473 data = 0;
474 rom = VFileOpen(game->path, O_RDONLY);
475 }
476 if (!rom) {
477 return false;
478 }
479
480 core = mCoreFindVF(rom);
481 if (!core) {
482 rom->close(rom);
483 mappedMemoryFree(data, game->size);
484 return false;
485 }
486 mCoreInitConfig(core, NULL);
487 core->init(core);
488 core->setAVStream(core, &stream);
489
490 size_t size = 256 * 224 * BYTES_PER_PIXEL;
491 outputBuffer = malloc(size);
492 memset(outputBuffer, 0xFF, size);
493 core->setVideoBuffer(core, outputBuffer, 256);
494
495 core->setAudioBufferSize(core, SAMPLES);
496
497 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
498 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
499
500 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
501
502 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
503 memset(savedata, 0xFF, SIZE_CART_FLASH1M);
504 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
505
506 _reloadSettings();
507 core->loadROM(core, rom);
508 core->loadSave(core, save);
509
510 const char* sysDir = 0;
511 const char* biosName = 0;
512 char biosPath[PATH_MAX];
513 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
514
515#ifdef M_CORE_GBA
516 if (core->platform(core) == PLATFORM_GBA) {
517 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
518 biosName = "gba_bios.bin";
519
520 }
521#endif
522
523#ifdef M_CORE_GB
524 if (core->platform(core) == PLATFORM_GB) {
525 memset(&cam, 0, sizeof(cam));
526 cam.height = GBCAM_HEIGHT;
527 cam.width = GBCAM_WIDTH;
528 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
529 cam.frame_raw_framebuffer = _updateCamera;
530 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
531
532 environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam);
533 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
534 struct GB* gb = core->board;
535
536 if (modelName) {
537 gb->model = GBNameToModel(modelName);
538 } else {
539 GBDetectModel(gb);
540 }
541
542 switch (gb->model) {
543 case GB_MODEL_AGB:
544 case GB_MODEL_CGB:
545 biosName = "gbc_bios.bin";
546 break;
547 case GB_MODEL_SGB:
548 biosName = "sgb_bios.bin";
549 break;
550 case GB_MODEL_DMG:
551 default:
552 biosName = "gb_bios.bin";
553 break;
554 }
555 }
556#endif
557
558 if (core->opts.useBios && sysDir && biosName) {
559 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
560 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
561 if (bios) {
562 core->loadBIOS(core, bios, 0);
563 }
564 }
565
566 core->reset(core);
567 _setupMaps(core);
568
569 return true;
570}
571
572void retro_unload_game(void) {
573 if (!core) {
574 return;
575 }
576 mCoreConfigDeinit(&core->config);
577 core->deinit(core);
578 mappedMemoryFree(data, dataSize);
579 data = 0;
580 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
581 savedata = 0;
582}
583
584size_t retro_serialize_size(void) {
585 struct VFile* vfm = VFileMemChunk(NULL, 0);
586 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
587 size_t size = vfm->size(vfm);
588 vfm->close(vfm);
589 return size;
590}
591
592bool retro_serialize(void* data, size_t size) {
593 struct VFile* vfm = VFileMemChunk(NULL, 0);
594 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
595 if ((ssize_t) size > vfm->size(vfm)) {
596 size = vfm->size(vfm);
597 } else if ((ssize_t) size < vfm->size(vfm)) {
598 vfm->close(vfm);
599 return false;
600 }
601 vfm->seek(vfm, 0, SEEK_SET);
602 vfm->read(vfm, data, size);
603 vfm->close(vfm);
604 return true;
605}
606
607bool retro_unserialize(const void* data, size_t size) {
608 struct VFile* vfm = VFileFromConstMemory(data, size);
609 bool success = mCoreLoadStateNamed(core, vfm, SAVESTATE_RTC);
610 vfm->close(vfm);
611 return success;
612}
613
614void retro_cheat_reset(void) {
615 mCheatDeviceClear(core->cheatDevice(core));
616}
617
618void retro_cheat_set(unsigned index, bool enabled, const char* code) {
619 UNUSED(index);
620 UNUSED(enabled);
621 struct mCheatDevice* device = core->cheatDevice(core);
622 struct mCheatSet* cheatSet = NULL;
623 if (mCheatSetsSize(&device->cheats)) {
624 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
625 } else {
626 cheatSet = device->createSet(device, NULL);
627 mCheatAddSet(device, cheatSet);
628 }
629// Convert the super wonky unportable libretro format to something normal
630#ifdef M_CORE_GBA
631 if (core->platform(core) == PLATFORM_GBA) {
632 char realCode[] = "XXXXXXXX XXXXXXXX";
633 size_t len = strlen(code) + 1; // Include null terminator
634 size_t i, pos;
635 for (i = 0, pos = 0; i < len; ++i) {
636 if (isspace((int) code[i]) || code[i] == '+') {
637 realCode[pos] = ' ';
638 } else {
639 realCode[pos] = code[i];
640 }
641 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
642 realCode[pos] = '\0';
643 mCheatAddLine(cheatSet, realCode, 0);
644 pos = 0;
645 continue;
646 }
647 ++pos;
648 }
649 }
650#endif
651#ifdef M_CORE_GB
652 if (core->platform(core) == PLATFORM_GB) {
653 char realCode[] = "XXX-XXX-XXX";
654 size_t len = strlen(code) + 1; // Include null terminator
655 size_t i, pos;
656 for (i = 0, pos = 0; i < len; ++i) {
657 if (isspace((int) code[i]) || code[i] == '+') {
658 realCode[pos] = '\0';
659 } else {
660 realCode[pos] = code[i];
661 }
662 if (pos == 11 || !realCode[pos]) {
663 realCode[pos] = '\0';
664 mCheatAddLine(cheatSet, realCode, 0);
665 pos = 0;
666 continue;
667 }
668 ++pos;
669 }
670 }
671#endif
672 cheatSet->refresh(cheatSet, device);
673}
674
675unsigned retro_get_region(void) {
676 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
677}
678
679void retro_set_controller_port_device(unsigned port, unsigned device) {
680 UNUSED(port);
681 UNUSED(device);
682}
683
684bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
685 UNUSED(game_type);
686 UNUSED(info);
687 UNUSED(num_info);
688 return false;
689}
690
691void* retro_get_memory_data(unsigned id) {
692 if (id != RETRO_MEMORY_SAVE_RAM) {
693 return 0;
694 }
695 return savedata;
696}
697
698size_t retro_get_memory_size(unsigned id) {
699 if (id != RETRO_MEMORY_SAVE_RAM) {
700 return 0;
701 }
702#ifdef M_CORE_GBA
703 if (core->platform(core) == PLATFORM_GBA) {
704 switch (((struct GBA*) core->board)->memory.savedata.type) {
705 case SAVEDATA_AUTODETECT:
706 return SIZE_CART_FLASH1M;
707 default:
708 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
709 }
710 }
711#endif
712#ifdef M_CORE_GB
713 if (core->platform(core) == PLATFORM_GB) {
714 return ((struct GB*) core->board)->sramSize;
715 }
716#endif
717 return 0;
718}
719
720void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
721 UNUSED(logger);
722 if (!logCallback) {
723 return;
724 }
725
726 char message[128];
727 vsnprintf(message, sizeof(message), format, args);
728
729 enum retro_log_level retroLevel = RETRO_LOG_INFO;
730 switch (level) {
731 case mLOG_ERROR:
732 case mLOG_FATAL:
733 retroLevel = RETRO_LOG_ERROR;
734 break;
735 case mLOG_WARN:
736 retroLevel = RETRO_LOG_WARN;
737 break;
738 case mLOG_INFO:
739 retroLevel = RETRO_LOG_INFO;
740 break;
741 case mLOG_GAME_ERROR:
742 case mLOG_STUB:
743#ifdef NDEBUG
744 return;
745#else
746 retroLevel = RETRO_LOG_DEBUG;
747 break;
748#endif
749 case mLOG_DEBUG:
750 retroLevel = RETRO_LOG_DEBUG;
751 break;
752 }
753#ifdef NDEBUG
754 static int biosCat = -1;
755 if (biosCat < 0) {
756 biosCat = mLogCategoryById("gba.bios");
757 }
758
759 if (category == biosCat) {
760 return;
761 }
762#endif
763 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
764}
765
766static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
767 UNUSED(stream);
768 int16_t samples[SAMPLES * 2];
769 blip_read_samples(left, samples, SAMPLES, true);
770 blip_read_samples(right, samples + 1, SAMPLES, true);
771 audioCallback(samples, SAMPLES);
772}
773
774static void _setRumble(struct mRumble* rumble, int enable) {
775 UNUSED(rumble);
776 if (!rumbleCallback) {
777 return;
778 }
779 if (enable) {
780 ++rumbleUp;
781 } else {
782 ++rumbleDown;
783 }
784}
785
786static void _updateLux(struct GBALuminanceSource* lux) {
787 UNUSED(lux);
788 struct retro_variable var = {
789 .key = "mgba_solar_sensor_level",
790 .value = 0
791 };
792
793 bool updated = false;
794 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
795 return;
796 }
797 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
798 return;
799 }
800
801 char* end;
802 int newLuxLevel = strtol(var.value, &end, 10);
803 if (!*end) {
804 if (newLuxLevel > 10) {
805 luxLevel = 10;
806 } else if (newLuxLevel < 0) {
807 luxLevel = 0;
808 } else {
809 luxLevel = newLuxLevel;
810 }
811 }
812}
813
814static uint8_t _readLux(struct GBALuminanceSource* lux) {
815 UNUSED(lux);
816 int value = 0x16;
817 if (luxLevel > 0) {
818 value += GBA_LUX_LEVELS[luxLevel - 1];
819 }
820 return 0xFF - value;
821}
822
823static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
824 if (!camData || width > camWidth || height > camHeight) {
825 if (camData) {
826 free(camData);
827 }
828 unsigned bufPitch = pitch / sizeof(*buffer);
829 unsigned bufHeight = height;
830 if (imcapWidth > bufPitch) {
831 bufPitch = imcapWidth;
832 }
833 if (imcapHeight > bufHeight) {
834 bufHeight = imcapHeight;
835 }
836 camData = malloc(sizeof(*buffer) * bufHeight * bufPitch);
837 memset(camData, 0xFF, sizeof(*buffer) * bufHeight * bufPitch);
838 camWidth = width;
839 camHeight = bufHeight;
840 camStride = bufPitch;
841 }
842 size_t i;
843 for (i = 0; i < height; ++i) {
844 memcpy(&camData[camStride * i], &buffer[pitch * i / sizeof(*buffer)], pitch);
845 }
846}
847
848static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
849 UNUSED(image);
850 UNUSED(colorFormats);
851
852 if (camData) {
853 free(camData);
854 }
855 camData = NULL;
856 imcapWidth = w;
857 imcapHeight = h;
858 cam.start();
859}
860
861static void _stopImage(struct mImageSource* image) {
862 UNUSED(image);
863 cam.stop();
864}
865
866static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
867 UNUSED(image);
868 if (!camData) {
869 cam.start();
870 *buffer = NULL;
871 return;
872 }
873 size_t offset = 0;
874 if (imcapWidth < camWidth) {
875 offset += (camWidth - imcapWidth) / 2;
876 }
877 if (imcapHeight < camHeight) {
878 offset += (camHeight - imcapHeight) / 2 * camStride;
879 }
880
881 *buffer = &camData[offset];
882 *stride = camStride;
883 *colorFormat = mCOLOR_XRGB8;
884}