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/version.h>
15#ifdef M_CORE_GB
16#include <mgba/gb/core.h>
17#include <mgba/internal/gb/gb.h>
18#include <mgba/internal/gb/mbc.h>
19#endif
20#ifdef M_CORE_GBA
21#include <mgba/gba/core.h>
22#include <mgba/gba/interface.h>
23#include <mgba/internal/gba/gba.h>
24#endif
25#include <mgba-util/circle-buffer.h>
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 rumbleLevel;
58static struct CircleBuffer rumbleHistory;
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 size_t camStride;
69
70static void _reloadSettings(void) {
71 struct mCoreOptions opts = {
72 .useBios = true,
73 .volume = 0x100,
74 };
75
76 struct retro_variable var;
77 enum GBModel model;
78 const char* modelName;
79
80 var.key = "mgba_gb_model";
81 var.value = 0;
82 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
83 if (strcmp(var.value, "Game Boy") == 0) {
84 model = GB_MODEL_DMG;
85 } else if (strcmp(var.value, "Super Game Boy") == 0) {
86 model = GB_MODEL_SGB;
87 } else if (strcmp(var.value, "Game Boy Color") == 0) {
88 model = GB_MODEL_CGB;
89 } else if (strcmp(var.value, "Game Boy Advance") == 0) {
90 model = GB_MODEL_AGB;
91 } else {
92 model = GB_MODEL_AUTODETECT;
93 }
94
95 modelName = GBModelToName(model);
96 mCoreConfigSetDefaultValue(&core->config, "gb.model", modelName);
97 mCoreConfigSetDefaultValue(&core->config, "sgb.model", modelName);
98 mCoreConfigSetDefaultValue(&core->config, "cgb.model", modelName);
99 }
100
101 var.key = "mgba_use_bios";
102 var.value = 0;
103 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
104 opts.useBios = strcmp(var.value, "ON") == 0;
105 }
106
107 var.key = "mgba_skip_bios";
108 var.value = 0;
109 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
110 opts.skipBios = strcmp(var.value, "ON") == 0;
111 }
112
113 var.key = "mgba_sgb_borders";
114 var.value = 0;
115 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
116 if (strcmp(var.value, "ON") == 0) {
117 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", true);
118 } else {
119 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", false);
120 }
121 }
122
123 var.key = "mgba_idle_optimization";
124 var.value = 0;
125 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
126 if (strcmp(var.value, "Don't Remove") == 0) {
127 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
128 } else if (strcmp(var.value, "Remove Known") == 0) {
129 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
130 } else if (strcmp(var.value, "Detect and Remove") == 0) {
131 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
132 }
133 }
134
135 var.key = "mgba_frameskip";
136 var.value = 0;
137 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
138 opts.frameskip = strtol(var.value, NULL, 10);
139
140 }
141
142 mCoreConfigLoadDefaults(&core->config, &opts);
143 mCoreLoadConfig(core);
144}
145
146unsigned retro_api_version(void) {
147 return RETRO_API_VERSION;
148}
149
150void retro_set_environment(retro_environment_t env) {
151 environCallback = env;
152
153 struct retro_variable vars[] = {
154 { "mgba_solar_sensor_level", "Solar sensor level; 0|1|2|3|4|5|6|7|8|9|10" },
155 { "mgba_allow_opposing_directions", "Allow opposing directional input; OFF|ON" },
156 { "mgba_gb_model", "Game Boy model (requires restart); Autodetect|Game Boy|Super Game Boy|Game Boy Color|Game Boy Advance" },
157 { "mgba_use_bios", "Use BIOS file if found (requires restart); ON|OFF" },
158 { "mgba_skip_bios", "Skip BIOS intro (requires restart); OFF|ON" },
159 { "mgba_sgb_borders", "Use Super Game Boy borders (requires restart); ON|OFF" },
160 { "mgba_idle_optimization", "Idle loop removal; Remove Known|Detect and Remove|Don't Remove" },
161 { "mgba_frameskip", "Frameskip; 0|1|2|3|4|5|6|7|8|9|10" },
162 { 0, 0 }
163 };
164
165 environCallback(RETRO_ENVIRONMENT_SET_VARIABLES, vars);
166}
167
168void retro_set_video_refresh(retro_video_refresh_t video) {
169 videoCallback = video;
170}
171
172void retro_set_audio_sample(retro_audio_sample_t audio) {
173 UNUSED(audio);
174}
175
176void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
177 audioCallback = audioBatch;
178}
179
180void retro_set_input_poll(retro_input_poll_t inputPoll) {
181 inputPollCallback = inputPoll;
182}
183
184void retro_set_input_state(retro_input_state_t input) {
185 inputCallback = input;
186}
187
188void retro_get_system_info(struct retro_system_info* info) {
189 info->need_fullpath = false;
190 info->valid_extensions = "gba|gb|gbc";
191 info->library_version = projectVersion;
192 info->library_name = projectName;
193 info->block_extract = false;
194}
195
196void retro_get_system_av_info(struct retro_system_av_info* info) {
197 unsigned width, height;
198 core->desiredVideoDimensions(core, &width, &height);
199 info->geometry.base_width = width;
200 info->geometry.base_height = height;
201#ifdef M_CORE_GB
202 if (core->platform(core) == PLATFORM_GB) {
203 info->geometry.max_width = 256;
204 info->geometry.max_height = 224;
205 } else
206#endif
207 {
208 info->geometry.max_width = width;
209 info->geometry.max_height = height;
210 }
211
212 info->geometry.aspect_ratio = width / (double) height;
213 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
214 info->timing.sample_rate = 32768;
215}
216
217void retro_init(void) {
218 enum retro_pixel_format fmt;
219#ifdef COLOR_16_BIT
220#ifdef COLOR_5_6_5
221 fmt = RETRO_PIXEL_FORMAT_RGB565;
222#else
223#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
224 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
225#endif
226#else
227#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
228 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
229#endif
230 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
231
232 struct retro_input_descriptor inputDescriptors[] = {
233 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
234 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
235 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
236 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
237 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
238 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
239 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
240 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
241 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
242 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
243 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
244 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
245 { 0 }
246 };
247 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
248
249 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
250
251 struct retro_rumble_interface rumbleInterface;
252 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
253 rumbleCallback = rumbleInterface.set_rumble_state;
254 CircleBufferInit(&rumbleHistory, RUMBLE_PWM);
255 rumble.setRumble = _setRumble;
256 } else {
257 rumbleCallback = 0;
258 }
259
260 luxLevel = 0;
261 lux.readLuminance = _readLux;
262 lux.sample = _updateLux;
263 _updateLux(&lux);
264
265 struct retro_log_callback log;
266 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
267 logCallback = log.log;
268 } else {
269 logCallback = 0;
270 }
271 logger.log = GBARetroLog;
272 mLogSetDefaultLogger(&logger);
273
274 stream.videoDimensionsChanged = 0;
275 stream.postAudioFrame = 0;
276 stream.postAudioBuffer = _postAudioBuffer;
277 stream.postVideoFrame = 0;
278
279 imageSource.startRequestImage = _startImage;
280 imageSource.stopRequestImage = _stopImage;
281 imageSource.requestImage = _requestImage;
282}
283
284void retro_deinit(void) {
285 free(outputBuffer);
286}
287
288void retro_run(void) {
289 uint16_t keys;
290 inputPollCallback();
291
292 bool updated = false;
293 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
294 struct retro_variable var = {
295 .key = "mgba_allow_opposing_directions",
296 .value = 0
297 };
298 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
299 ((struct GBA*) core->board)->allowOpposingDirections = strcmp(var.value, "yes") == 0;
300 }
301
302 var.key = "mgba_frameskip";
303 var.value = 0;
304 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
305 mCoreConfigSetUIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
306 mCoreLoadConfig(core);
307 }
308 }
309
310 keys = 0;
311 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
312 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
313 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
314 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
315 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
316 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
317 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
318 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
319 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
320 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
321 core->setKeys(core, keys);
322
323 static bool wasAdjustingLux = false;
324 if (wasAdjustingLux) {
325 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
326 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
327 } else {
328 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
329 ++luxLevel;
330 if (luxLevel > 10) {
331 luxLevel = 10;
332 }
333 wasAdjustingLux = true;
334 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
335 --luxLevel;
336 if (luxLevel < 0) {
337 luxLevel = 0;
338 }
339 wasAdjustingLux = true;
340 }
341 }
342
343 core->runFrame(core);
344 unsigned width, height;
345 core->desiredVideoDimensions(core, &width, &height);
346 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
347}
348
349static void _setupMaps(struct mCore* core) {
350#ifdef M_CORE_GBA
351 if (core->platform(core) == PLATFORM_GBA) {
352 struct GBA* gba = core->board;
353 struct retro_memory_descriptor descs[11];
354 struct retro_memory_map mmaps;
355 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
356
357 memset(descs, 0, sizeof(descs));
358 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
359
360 /* Map internal working RAM */
361 descs[0].ptr = gba->memory.iwram;
362 descs[0].start = BASE_WORKING_IRAM;
363 descs[0].len = SIZE_WORKING_IRAM;
364 descs[0].select = 0xFF000000;
365
366 /* Map working RAM */
367 descs[1].ptr = gba->memory.wram;
368 descs[1].start = BASE_WORKING_RAM;
369 descs[1].len = SIZE_WORKING_RAM;
370 descs[1].select = 0xFF000000;
371
372 /* Map save RAM */
373 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
374 descs[2].ptr = savedataSize ? savedata : NULL;
375 descs[2].start = BASE_CART_SRAM;
376 descs[2].len = savedataSize;
377
378 /* Map ROM */
379 descs[3].ptr = gba->memory.rom;
380 descs[3].start = BASE_CART0;
381 descs[3].len = romSize;
382 descs[3].flags = RETRO_MEMDESC_CONST;
383
384 descs[4].ptr = gba->memory.rom;
385 descs[4].start = BASE_CART1;
386 descs[4].len = romSize;
387 descs[4].flags = RETRO_MEMDESC_CONST;
388
389 descs[5].ptr = gba->memory.rom;
390 descs[5].start = BASE_CART2;
391 descs[5].len = romSize;
392 descs[5].flags = RETRO_MEMDESC_CONST;
393
394 /* Map BIOS */
395 descs[6].ptr = gba->memory.bios;
396 descs[6].start = BASE_BIOS;
397 descs[6].len = SIZE_BIOS;
398 descs[6].flags = RETRO_MEMDESC_CONST;
399
400 /* Map VRAM */
401 descs[7].ptr = gba->video.vram;
402 descs[7].start = BASE_VRAM;
403 descs[7].len = SIZE_VRAM;
404 descs[7].select = 0xFF000000;
405
406 /* Map palette RAM */
407 descs[8].ptr = gba->video.palette;
408 descs[8].start = BASE_PALETTE_RAM;
409 descs[8].len = SIZE_PALETTE_RAM;
410 descs[8].select = 0xFF000000;
411
412 /* Map OAM */
413 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
414 descs[9].start = BASE_OAM;
415 descs[9].len = SIZE_OAM;
416 descs[9].select = 0xFF000000;
417
418 /* Map mmapped I/O */
419 descs[10].ptr = gba->memory.io;
420 descs[10].start = BASE_IO;
421 descs[10].len = SIZE_IO;
422
423 mmaps.descriptors = descs;
424 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
425
426 bool yes = true;
427 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
428 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
429 }
430#endif
431}
432
433void retro_reset(void) {
434 core->reset(core);
435 _setupMaps(core);
436
437 if (rumbleCallback) {
438 CircleBufferClear(&rumbleHistory);
439 }
440}
441
442bool retro_load_game(const struct retro_game_info* game) {
443 struct VFile* rom;
444 if (game->data) {
445 data = anonymousMemoryMap(game->size);
446 dataSize = game->size;
447 memcpy(data, game->data, game->size);
448 rom = VFileFromMemory(data, game->size);
449 } else {
450 data = 0;
451 rom = VFileOpen(game->path, O_RDONLY);
452 }
453 if (!rom) {
454 return false;
455 }
456
457 core = mCoreFindVF(rom);
458 if (!core) {
459 rom->close(rom);
460 mappedMemoryFree(data, game->size);
461 return false;
462 }
463 mCoreInitConfig(core, NULL);
464 core->init(core);
465 core->setAVStream(core, &stream);
466
467 size_t size = 256 * 224 * BYTES_PER_PIXEL;
468 outputBuffer = malloc(size);
469 memset(outputBuffer, 0xFF, size);
470 core->setVideoBuffer(core, outputBuffer, 256);
471
472 core->setAudioBufferSize(core, SAMPLES);
473
474 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
475 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
476
477 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
478
479 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
480 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
481
482 _reloadSettings();
483 core->loadROM(core, rom);
484 core->loadSave(core, save);
485
486 const char* sysDir = 0;
487 const char* biosName = 0;
488 char biosPath[PATH_MAX];
489 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
490
491#ifdef M_CORE_GBA
492 if (core->platform(core) == PLATFORM_GBA) {
493 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
494 biosName = "gba_bios.bin";
495
496 }
497#endif
498
499#ifdef M_CORE_GB
500 if (core->platform(core) == PLATFORM_GB) {
501 memset(&cam, 0, sizeof(cam));
502 cam.height = GBCAM_HEIGHT;
503 cam.width = GBCAM_WIDTH;
504 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
505 cam.frame_raw_framebuffer = _updateCamera;
506 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
507
508 environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam);
509 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
510 struct GB* gb = core->board;
511
512 if (modelName) {
513 gb->model = GBNameToModel(modelName);
514 } else {
515 GBDetectModel(gb);
516 }
517
518 switch (gb->model) {
519 case GB_MODEL_AGB:
520 case GB_MODEL_CGB:
521 biosName = "gbc_bios.bin";
522 break;
523 case GB_MODEL_SGB:
524 biosName = "sgb_bios.bin";
525 break;
526 case GB_MODEL_DMG:
527 default:
528 biosName = "gb_bios.bin";
529 break;
530 }
531 }
532#endif
533
534 if (core->opts.useBios && sysDir && biosName) {
535 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
536 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
537 if (bios) {
538 core->loadBIOS(core, bios, 0);
539 }
540 }
541
542 core->reset(core);
543 _setupMaps(core);
544
545 return true;
546}
547
548void retro_unload_game(void) {
549 if (!core) {
550 return;
551 }
552 core->deinit(core);
553 mappedMemoryFree(data, dataSize);
554 data = 0;
555 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
556 savedata = 0;
557 CircleBufferDeinit(&rumbleHistory);
558}
559
560size_t retro_serialize_size(void) {
561 return core->stateSize(core);
562}
563
564bool retro_serialize(void* data, size_t size) {
565 if (size != retro_serialize_size()) {
566 return false;
567 }
568 core->saveState(core, data);
569 return true;
570}
571
572bool retro_unserialize(const void* data, size_t size) {
573 if (size != retro_serialize_size()) {
574 return false;
575 }
576 core->loadState(core, data);
577 return true;
578}
579
580void retro_cheat_reset(void) {
581 mCheatDeviceClear(core->cheatDevice(core));
582}
583
584void retro_cheat_set(unsigned index, bool enabled, const char* code) {
585 UNUSED(index);
586 UNUSED(enabled);
587 struct mCheatDevice* device = core->cheatDevice(core);
588 struct mCheatSet* cheatSet = NULL;
589 if (mCheatSetsSize(&device->cheats)) {
590 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
591 } else {
592 cheatSet = device->createSet(device, NULL);
593 mCheatAddSet(device, cheatSet);
594 }
595 // Convert the super wonky unportable libretro format to something normal
596 char realCode[] = "XXXXXXXX XXXXXXXX";
597 size_t len = strlen(code) + 1; // Include null terminator
598 size_t i, pos;
599 for (i = 0, pos = 0; i < len; ++i) {
600 if (isspace((int) code[i]) || code[i] == '+') {
601 realCode[pos] = ' ';
602 } else {
603 realCode[pos] = code[i];
604 }
605 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
606 realCode[pos] = '\0';
607 mCheatAddLine(cheatSet, realCode, 0);
608 pos = 0;
609 continue;
610 }
611 ++pos;
612 }
613}
614
615unsigned retro_get_region(void) {
616 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
617}
618
619void retro_set_controller_port_device(unsigned port, unsigned device) {
620 UNUSED(port);
621 UNUSED(device);
622}
623
624bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
625 UNUSED(game_type);
626 UNUSED(info);
627 UNUSED(num_info);
628 return false;
629}
630
631void* retro_get_memory_data(unsigned id) {
632 if (id != RETRO_MEMORY_SAVE_RAM) {
633 return 0;
634 }
635 return savedata;
636}
637
638size_t retro_get_memory_size(unsigned id) {
639 if (id != RETRO_MEMORY_SAVE_RAM) {
640 return 0;
641 }
642#ifdef M_CORE_GBA
643 if (core->platform(core) == PLATFORM_GBA) {
644 switch (((struct GBA*) core->board)->memory.savedata.type) {
645 case SAVEDATA_AUTODETECT:
646 return SIZE_CART_FLASH1M;
647 default:
648 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
649 }
650 }
651#endif
652#ifdef M_CORE_GB
653 if (core->platform(core) == PLATFORM_GB) {
654 return ((struct GB*) core->board)->sramSize;
655 }
656#endif
657 return 0;
658}
659
660void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
661 UNUSED(logger);
662 if (!logCallback) {
663 return;
664 }
665
666 char message[128];
667 vsnprintf(message, sizeof(message), format, args);
668
669 enum retro_log_level retroLevel = RETRO_LOG_INFO;
670 switch (level) {
671 case mLOG_ERROR:
672 case mLOG_FATAL:
673 retroLevel = RETRO_LOG_ERROR;
674 break;
675 case mLOG_WARN:
676 retroLevel = RETRO_LOG_WARN;
677 break;
678 case mLOG_INFO:
679 retroLevel = RETRO_LOG_INFO;
680 break;
681 case mLOG_GAME_ERROR:
682 case mLOG_STUB:
683#ifdef NDEBUG
684 return;
685#else
686 retroLevel = RETRO_LOG_DEBUG;
687 break;
688#endif
689 case mLOG_DEBUG:
690 retroLevel = RETRO_LOG_DEBUG;
691 break;
692 }
693#ifdef NDEBUG
694 static int biosCat = -1;
695 if (biosCat < 0) {
696 biosCat = mLogCategoryById("gba.bios");
697 }
698
699 if (category == biosCat) {
700 return;
701 }
702#endif
703 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
704}
705
706static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
707 UNUSED(stream);
708 int16_t samples[SAMPLES * 2];
709 blip_read_samples(left, samples, SAMPLES, true);
710 blip_read_samples(right, samples + 1, SAMPLES, true);
711 audioCallback(samples, SAMPLES);
712}
713
714static void _setRumble(struct mRumble* rumble, int enable) {
715 UNUSED(rumble);
716 if (!rumbleCallback) {
717 return;
718 }
719 rumbleLevel += enable;
720 if (CircleBufferSize(&rumbleHistory) == RUMBLE_PWM) {
721 int8_t oldLevel;
722 CircleBufferRead8(&rumbleHistory, &oldLevel);
723 rumbleLevel -= oldLevel;
724 }
725 CircleBufferWrite8(&rumbleHistory, enable);
726 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleLevel * 0xFFFF / RUMBLE_PWM);
727 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleLevel * 0xFFFF / RUMBLE_PWM);
728}
729
730static void _updateLux(struct GBALuminanceSource* lux) {
731 UNUSED(lux);
732 struct retro_variable var = {
733 .key = "mgba_solar_sensor_level",
734 .value = 0
735 };
736
737 bool updated = false;
738 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
739 return;
740 }
741 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
742 return;
743 }
744
745 char* end;
746 int newLuxLevel = strtol(var.value, &end, 10);
747 if (!*end) {
748 if (newLuxLevel > 10) {
749 luxLevel = 10;
750 } else if (newLuxLevel < 0) {
751 luxLevel = 0;
752 } else {
753 luxLevel = newLuxLevel;
754 }
755 }
756}
757
758static uint8_t _readLux(struct GBALuminanceSource* lux) {
759 UNUSED(lux);
760 int value = 0x16;
761 if (luxLevel > 0) {
762 value += GBA_LUX_LEVELS[luxLevel - 1];
763 }
764 return 0xFF - value;
765}
766
767static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
768 if (!camData || width != camWidth || height != camHeight) {
769 camData = malloc(sizeof(*buffer) * height * pitch);
770 camWidth = width;
771 camHeight = height;
772 camStride = pitch / sizeof(*buffer);
773 }
774 memcpy(camData, buffer, sizeof(*buffer) * height * pitch);
775}
776
777static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
778 UNUSED(image);
779 UNUSED(colorFormats);
780
781 camData = NULL;
782 cam.start();
783}
784
785static void _stopImage(struct mImageSource* image) {
786 UNUSED(image);
787 cam.stop();
788}
789
790static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
791 UNUSED(image);
792 if (!camData) {
793 cam.start();
794 }
795 *buffer = camData;
796 *stride = camStride;
797 *colorFormat = mCOLOR_XRGB8;
798}