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