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/circle-buffer.h>
27#include <mgba-util/memory.h>
28#include <mgba-util/vfs.h>
29
30#define SAMPLES 1024
31#define RUMBLE_PWM 35
32
33static retro_environment_t environCallback;
34static retro_video_refresh_t videoCallback;
35static retro_audio_sample_batch_t audioCallback;
36static retro_input_poll_t inputPollCallback;
37static retro_input_state_t inputCallback;
38static retro_log_printf_t logCallback;
39static retro_set_rumble_state_t rumbleCallback;
40
41static void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args);
42
43static void _postAudioBuffer(struct mAVStream*, blip_t* left, blip_t* right);
44static void _setRumble(struct mRumble* rumble, int enable);
45static uint8_t _readLux(struct GBALuminanceSource* lux);
46static void _updateLux(struct GBALuminanceSource* lux);
47static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch);
48static void _startImage(struct mImageSource*, unsigned w, unsigned h, int colorFormats);
49static void _stopImage(struct mImageSource*);
50static void _requestImage(struct mImageSource*, const void** buffer, size_t* stride, enum mColorFormat* colorFormat);
51
52static struct mCore* core;
53static void* outputBuffer;
54static void* data;
55static size_t dataSize;
56static void* savedata;
57static struct mAVStream stream;
58static int rumbleLevel;
59static struct CircleBuffer rumbleHistory;
60static struct mRumble rumble;
61static struct GBALuminanceSource lux;
62static int luxLevel;
63static struct mLogger logger;
64static struct retro_camera_callback cam;
65static struct mImageSource imageSource;
66static uint32_t* camData = NULL;
67static unsigned camWidth;
68static unsigned camHeight;
69static unsigned imcapWidth;
70static unsigned imcapHeight;
71static size_t camStride;
72
73static void _reloadSettings(void) {
74 struct mCoreOptions opts = {
75 .useBios = true,
76 .volume = 0x100,
77 };
78
79 struct retro_variable var;
80 enum GBModel model;
81 const char* modelName;
82
83 var.key = "mgba_gb_model";
84 var.value = 0;
85 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
86 if (strcmp(var.value, "Game Boy") == 0) {
87 model = GB_MODEL_DMG;
88 } else if (strcmp(var.value, "Super Game Boy") == 0) {
89 model = GB_MODEL_SGB;
90 } else if (strcmp(var.value, "Game Boy Color") == 0) {
91 model = GB_MODEL_CGB;
92 } else if (strcmp(var.value, "Game Boy Advance") == 0) {
93 model = GB_MODEL_AGB;
94 } else {
95 model = GB_MODEL_AUTODETECT;
96 }
97
98 modelName = GBModelToName(model);
99 mCoreConfigSetDefaultValue(&core->config, "gb.model", modelName);
100 mCoreConfigSetDefaultValue(&core->config, "sgb.model", modelName);
101 mCoreConfigSetDefaultValue(&core->config, "cgb.model", modelName);
102 }
103
104 var.key = "mgba_use_bios";
105 var.value = 0;
106 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
107 opts.useBios = strcmp(var.value, "ON") == 0;
108 }
109
110 var.key = "mgba_skip_bios";
111 var.value = 0;
112 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
113 opts.skipBios = strcmp(var.value, "ON") == 0;
114 }
115
116 var.key = "mgba_sgb_borders";
117 var.value = 0;
118 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
119 if (strcmp(var.value, "ON") == 0) {
120 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", true);
121 } else {
122 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", false);
123 }
124 }
125
126 var.key = "mgba_idle_optimization";
127 var.value = 0;
128 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
129 if (strcmp(var.value, "Don't Remove") == 0) {
130 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
131 } else if (strcmp(var.value, "Remove Known") == 0) {
132 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
133 } else if (strcmp(var.value, "Detect and Remove") == 0) {
134 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
135 }
136 }
137
138 var.key = "mgba_frameskip";
139 var.value = 0;
140 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
141 opts.frameskip = strtol(var.value, NULL, 10);
142
143 }
144
145 mCoreConfigLoadDefaults(&core->config, &opts);
146 mCoreLoadConfig(core);
147}
148
149unsigned retro_api_version(void) {
150 return RETRO_API_VERSION;
151}
152
153void retro_set_environment(retro_environment_t env) {
154 environCallback = env;
155
156 struct retro_variable vars[] = {
157 { "mgba_solar_sensor_level", "Solar sensor level; 0|1|2|3|4|5|6|7|8|9|10" },
158 { "mgba_allow_opposing_directions", "Allow opposing directional input; OFF|ON" },
159 { "mgba_gb_model", "Game Boy model (requires restart); Autodetect|Game Boy|Super Game Boy|Game Boy Color|Game Boy Advance" },
160 { "mgba_use_bios", "Use BIOS file if found (requires restart); ON|OFF" },
161 { "mgba_skip_bios", "Skip BIOS intro (requires restart); OFF|ON" },
162 { "mgba_sgb_borders", "Use Super Game Boy borders (requires restart); ON|OFF" },
163 { "mgba_idle_optimization", "Idle loop removal; Remove Known|Detect and Remove|Don't Remove" },
164 { "mgba_frameskip", "Frameskip; 0|1|2|3|4|5|6|7|8|9|10" },
165 { 0, 0 }
166 };
167
168 environCallback(RETRO_ENVIRONMENT_SET_VARIABLES, vars);
169}
170
171void retro_set_video_refresh(retro_video_refresh_t video) {
172 videoCallback = video;
173}
174
175void retro_set_audio_sample(retro_audio_sample_t audio) {
176 UNUSED(audio);
177}
178
179void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
180 audioCallback = audioBatch;
181}
182
183void retro_set_input_poll(retro_input_poll_t inputPoll) {
184 inputPollCallback = inputPoll;
185}
186
187void retro_set_input_state(retro_input_state_t input) {
188 inputCallback = input;
189}
190
191void retro_get_system_info(struct retro_system_info* info) {
192 info->need_fullpath = false;
193 info->valid_extensions = "gba|gb|gbc";
194 info->library_version = projectVersion;
195 info->library_name = projectName;
196 info->block_extract = false;
197}
198
199void retro_get_system_av_info(struct retro_system_av_info* info) {
200 unsigned width, height;
201 core->desiredVideoDimensions(core, &width, &height);
202 info->geometry.base_width = width;
203 info->geometry.base_height = height;
204#ifdef M_CORE_GB
205 if (core->platform(core) == PLATFORM_GB) {
206 info->geometry.max_width = 256;
207 info->geometry.max_height = 224;
208 } else
209#endif
210 {
211 info->geometry.max_width = width;
212 info->geometry.max_height = height;
213 }
214
215 info->geometry.aspect_ratio = width / (double) height;
216 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
217 info->timing.sample_rate = 32768;
218}
219
220void retro_init(void) {
221 enum retro_pixel_format fmt;
222#ifdef COLOR_16_BIT
223#ifdef COLOR_5_6_5
224 fmt = RETRO_PIXEL_FORMAT_RGB565;
225#else
226#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
227 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
228#endif
229#else
230#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
231 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
232#endif
233 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
234
235 struct retro_input_descriptor inputDescriptors[] = {
236 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
237 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
238 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
239 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
240 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
241 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
242 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
243 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
244 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
245 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
246 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
247 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
248 { 0 }
249 };
250 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
251
252 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
253
254 struct retro_rumble_interface rumbleInterface;
255 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
256 rumbleCallback = rumbleInterface.set_rumble_state;
257 CircleBufferInit(&rumbleHistory, RUMBLE_PWM);
258 rumble.setRumble = _setRumble;
259 } else {
260 rumbleCallback = 0;
261 }
262
263 luxLevel = 0;
264 lux.readLuminance = _readLux;
265 lux.sample = _updateLux;
266 _updateLux(&lux);
267
268 struct retro_log_callback log;
269 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
270 logCallback = log.log;
271 } else {
272 logCallback = 0;
273 }
274 logger.log = GBARetroLog;
275 mLogSetDefaultLogger(&logger);
276
277 stream.videoDimensionsChanged = 0;
278 stream.postAudioFrame = 0;
279 stream.postAudioBuffer = _postAudioBuffer;
280 stream.postVideoFrame = 0;
281
282 imageSource.startRequestImage = _startImage;
283 imageSource.stopRequestImage = _stopImage;
284 imageSource.requestImage = _requestImage;
285}
286
287void retro_deinit(void) {
288 free(outputBuffer);
289}
290
291void retro_run(void) {
292 uint16_t keys;
293 inputPollCallback();
294
295 bool updated = false;
296 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
297 struct retro_variable var = {
298 .key = "mgba_allow_opposing_directions",
299 .value = 0
300 };
301 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
302 ((struct GBA*) core->board)->allowOpposingDirections = strcmp(var.value, "yes") == 0;
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
352static void _setupMaps(struct mCore* core) {
353#ifdef M_CORE_GBA
354 if (core->platform(core) == PLATFORM_GBA) {
355 struct GBA* gba = core->board;
356 struct retro_memory_descriptor descs[11];
357 struct retro_memory_map mmaps;
358 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
359
360 memset(descs, 0, sizeof(descs));
361 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
362
363 /* Map internal working RAM */
364 descs[0].ptr = gba->memory.iwram;
365 descs[0].start = BASE_WORKING_IRAM;
366 descs[0].len = SIZE_WORKING_IRAM;
367 descs[0].select = 0xFF000000;
368
369 /* Map working RAM */
370 descs[1].ptr = gba->memory.wram;
371 descs[1].start = BASE_WORKING_RAM;
372 descs[1].len = SIZE_WORKING_RAM;
373 descs[1].select = 0xFF000000;
374
375 /* Map save RAM */
376 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
377 descs[2].ptr = savedataSize ? savedata : NULL;
378 descs[2].start = BASE_CART_SRAM;
379 descs[2].len = savedataSize;
380
381 /* Map ROM */
382 descs[3].ptr = gba->memory.rom;
383 descs[3].start = BASE_CART0;
384 descs[3].len = romSize;
385 descs[3].flags = RETRO_MEMDESC_CONST;
386
387 descs[4].ptr = gba->memory.rom;
388 descs[4].start = BASE_CART1;
389 descs[4].len = romSize;
390 descs[4].flags = RETRO_MEMDESC_CONST;
391
392 descs[5].ptr = gba->memory.rom;
393 descs[5].start = BASE_CART2;
394 descs[5].len = romSize;
395 descs[5].flags = RETRO_MEMDESC_CONST;
396
397 /* Map BIOS */
398 descs[6].ptr = gba->memory.bios;
399 descs[6].start = BASE_BIOS;
400 descs[6].len = SIZE_BIOS;
401 descs[6].flags = RETRO_MEMDESC_CONST;
402
403 /* Map VRAM */
404 descs[7].ptr = gba->video.vram;
405 descs[7].start = BASE_VRAM;
406 descs[7].len = SIZE_VRAM;
407 descs[7].select = 0xFF000000;
408
409 /* Map palette RAM */
410 descs[8].ptr = gba->video.palette;
411 descs[8].start = BASE_PALETTE_RAM;
412 descs[8].len = SIZE_PALETTE_RAM;
413 descs[8].select = 0xFF000000;
414
415 /* Map OAM */
416 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
417 descs[9].start = BASE_OAM;
418 descs[9].len = SIZE_OAM;
419 descs[9].select = 0xFF000000;
420
421 /* Map mmapped I/O */
422 descs[10].ptr = gba->memory.io;
423 descs[10].start = BASE_IO;
424 descs[10].len = SIZE_IO;
425
426 mmaps.descriptors = descs;
427 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
428
429 bool yes = true;
430 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
431 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
432 }
433#endif
434}
435
436void retro_reset(void) {
437 core->reset(core);
438 _setupMaps(core);
439
440 if (rumbleCallback) {
441 CircleBufferClear(&rumbleHistory);
442 }
443}
444
445bool retro_load_game(const struct retro_game_info* game) {
446 struct VFile* rom;
447 if (game->data) {
448 data = anonymousMemoryMap(game->size);
449 dataSize = game->size;
450 memcpy(data, game->data, game->size);
451 rom = VFileFromMemory(data, game->size);
452 } else {
453 data = 0;
454 rom = VFileOpen(game->path, O_RDONLY);
455 }
456 if (!rom) {
457 return false;
458 }
459
460 core = mCoreFindVF(rom);
461 if (!core) {
462 rom->close(rom);
463 mappedMemoryFree(data, game->size);
464 return false;
465 }
466 mCoreInitConfig(core, NULL);
467 core->init(core);
468 core->setAVStream(core, &stream);
469
470 size_t size = 256 * 224 * BYTES_PER_PIXEL;
471 outputBuffer = malloc(size);
472 memset(outputBuffer, 0xFF, size);
473 core->setVideoBuffer(core, outputBuffer, 256);
474
475 core->setAudioBufferSize(core, SAMPLES);
476
477 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
478 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
479
480 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
481
482 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
483 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
484
485 _reloadSettings();
486 core->loadROM(core, rom);
487 core->loadSave(core, save);
488
489 const char* sysDir = 0;
490 const char* biosName = 0;
491 char biosPath[PATH_MAX];
492 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
493
494#ifdef M_CORE_GBA
495 if (core->platform(core) == PLATFORM_GBA) {
496 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
497 biosName = "gba_bios.bin";
498
499 }
500#endif
501
502#ifdef M_CORE_GB
503 if (core->platform(core) == PLATFORM_GB) {
504 memset(&cam, 0, sizeof(cam));
505 cam.height = GBCAM_HEIGHT;
506 cam.width = GBCAM_WIDTH;
507 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
508 cam.frame_raw_framebuffer = _updateCamera;
509 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
510
511 environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam);
512 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
513 struct GB* gb = core->board;
514
515 if (modelName) {
516 gb->model = GBNameToModel(modelName);
517 } else {
518 GBDetectModel(gb);
519 }
520
521 switch (gb->model) {
522 case GB_MODEL_AGB:
523 case GB_MODEL_CGB:
524 biosName = "gbc_bios.bin";
525 break;
526 case GB_MODEL_SGB:
527 biosName = "sgb_bios.bin";
528 break;
529 case GB_MODEL_DMG:
530 default:
531 biosName = "gb_bios.bin";
532 break;
533 }
534 }
535#endif
536
537 if (core->opts.useBios && sysDir && biosName) {
538 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
539 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
540 if (bios) {
541 core->loadBIOS(core, bios, 0);
542 }
543 }
544
545 core->reset(core);
546 _setupMaps(core);
547
548 return true;
549}
550
551void retro_unload_game(void) {
552 if (!core) {
553 return;
554 }
555 core->deinit(core);
556 mappedMemoryFree(data, dataSize);
557 data = 0;
558 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
559 savedata = 0;
560 CircleBufferDeinit(&rumbleHistory);
561}
562
563size_t retro_serialize_size(void) {
564 struct VFile* vfm = VFileMemChunk(NULL, 0);
565 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
566 size_t size = vfm->size(vfm);
567 vfm->close(vfm);
568 return size;
569}
570
571bool retro_serialize(void* data, size_t size) {
572 struct VFile* vfm = VFileMemChunk(NULL, 0);
573 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
574 if ((ssize_t) size > vfm->size(vfm)) {
575 size = vfm->size(vfm);
576 } else if ((ssize_t) size < vfm->size(vfm)) {
577 vfm->close(vfm);
578 return false;
579 }
580 vfm->seek(vfm, 0, SEEK_SET);
581 vfm->read(vfm, data, size);
582 vfm->close(vfm);
583 return true;
584}
585
586bool retro_unserialize(const void* data, size_t size) {
587 struct VFile* vfm = VFileFromConstMemory(data, size);
588 bool success = mCoreLoadStateNamed(core, vfm, SAVESTATE_RTC);
589 vfm->close(vfm);
590 return success;
591}
592
593void retro_cheat_reset(void) {
594 mCheatDeviceClear(core->cheatDevice(core));
595}
596
597void retro_cheat_set(unsigned index, bool enabled, const char* code) {
598 UNUSED(index);
599 UNUSED(enabled);
600 struct mCheatDevice* device = core->cheatDevice(core);
601 struct mCheatSet* cheatSet = NULL;
602 if (mCheatSetsSize(&device->cheats)) {
603 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
604 } else {
605 cheatSet = device->createSet(device, NULL);
606 mCheatAddSet(device, cheatSet);
607 }
608 // Convert the super wonky unportable libretro format to something normal
609 char realCode[] = "XXXXXXXX XXXXXXXX";
610 size_t len = strlen(code) + 1; // Include null terminator
611 size_t i, pos;
612 for (i = 0, pos = 0; i < len; ++i) {
613 if (isspace((int) code[i]) || code[i] == '+') {
614 realCode[pos] = ' ';
615 } else {
616 realCode[pos] = code[i];
617 }
618 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
619 realCode[pos] = '\0';
620 mCheatAddLine(cheatSet, realCode, 0);
621 pos = 0;
622 continue;
623 }
624 ++pos;
625 }
626}
627
628unsigned retro_get_region(void) {
629 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
630}
631
632void retro_set_controller_port_device(unsigned port, unsigned device) {
633 UNUSED(port);
634 UNUSED(device);
635}
636
637bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
638 UNUSED(game_type);
639 UNUSED(info);
640 UNUSED(num_info);
641 return false;
642}
643
644void* retro_get_memory_data(unsigned id) {
645 if (id != RETRO_MEMORY_SAVE_RAM) {
646 return 0;
647 }
648 return savedata;
649}
650
651size_t retro_get_memory_size(unsigned id) {
652 if (id != RETRO_MEMORY_SAVE_RAM) {
653 return 0;
654 }
655#ifdef M_CORE_GBA
656 if (core->platform(core) == PLATFORM_GBA) {
657 switch (((struct GBA*) core->board)->memory.savedata.type) {
658 case SAVEDATA_AUTODETECT:
659 return SIZE_CART_FLASH1M;
660 default:
661 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
662 }
663 }
664#endif
665#ifdef M_CORE_GB
666 if (core->platform(core) == PLATFORM_GB) {
667 return ((struct GB*) core->board)->sramSize;
668 }
669#endif
670 return 0;
671}
672
673void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
674 UNUSED(logger);
675 if (!logCallback) {
676 return;
677 }
678
679 char message[128];
680 vsnprintf(message, sizeof(message), format, args);
681
682 enum retro_log_level retroLevel = RETRO_LOG_INFO;
683 switch (level) {
684 case mLOG_ERROR:
685 case mLOG_FATAL:
686 retroLevel = RETRO_LOG_ERROR;
687 break;
688 case mLOG_WARN:
689 retroLevel = RETRO_LOG_WARN;
690 break;
691 case mLOG_INFO:
692 retroLevel = RETRO_LOG_INFO;
693 break;
694 case mLOG_GAME_ERROR:
695 case mLOG_STUB:
696#ifdef NDEBUG
697 return;
698#else
699 retroLevel = RETRO_LOG_DEBUG;
700 break;
701#endif
702 case mLOG_DEBUG:
703 retroLevel = RETRO_LOG_DEBUG;
704 break;
705 }
706#ifdef NDEBUG
707 static int biosCat = -1;
708 if (biosCat < 0) {
709 biosCat = mLogCategoryById("gba.bios");
710 }
711
712 if (category == biosCat) {
713 return;
714 }
715#endif
716 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
717}
718
719static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
720 UNUSED(stream);
721 int16_t samples[SAMPLES * 2];
722 blip_read_samples(left, samples, SAMPLES, true);
723 blip_read_samples(right, samples + 1, SAMPLES, true);
724 audioCallback(samples, SAMPLES);
725}
726
727static void _setRumble(struct mRumble* rumble, int enable) {
728 UNUSED(rumble);
729 if (!rumbleCallback) {
730 return;
731 }
732 rumbleLevel += enable;
733 if (CircleBufferSize(&rumbleHistory) == RUMBLE_PWM) {
734 int8_t oldLevel;
735 CircleBufferRead8(&rumbleHistory, &oldLevel);
736 rumbleLevel -= oldLevel;
737 }
738 CircleBufferWrite8(&rumbleHistory, enable);
739 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleLevel * 0xFFFF / RUMBLE_PWM);
740 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleLevel * 0xFFFF / RUMBLE_PWM);
741}
742
743static void _updateLux(struct GBALuminanceSource* lux) {
744 UNUSED(lux);
745 struct retro_variable var = {
746 .key = "mgba_solar_sensor_level",
747 .value = 0
748 };
749
750 bool updated = false;
751 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
752 return;
753 }
754 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
755 return;
756 }
757
758 char* end;
759 int newLuxLevel = strtol(var.value, &end, 10);
760 if (!*end) {
761 if (newLuxLevel > 10) {
762 luxLevel = 10;
763 } else if (newLuxLevel < 0) {
764 luxLevel = 0;
765 } else {
766 luxLevel = newLuxLevel;
767 }
768 }
769}
770
771static uint8_t _readLux(struct GBALuminanceSource* lux) {
772 UNUSED(lux);
773 int value = 0x16;
774 if (luxLevel > 0) {
775 value += GBA_LUX_LEVELS[luxLevel - 1];
776 }
777 return 0xFF - value;
778}
779
780static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
781 if (!camData || width > camWidth || height > camHeight) {
782 if (camData) {
783 free(camData);
784 }
785 unsigned bufPitch = pitch / sizeof(*buffer);
786 unsigned bufHeight = height;
787 if (imcapWidth > bufPitch) {
788 bufPitch = imcapWidth;
789 }
790 if (imcapHeight > bufHeight) {
791 bufHeight = imcapHeight;
792 }
793 camData = malloc(sizeof(*buffer) * bufHeight * bufPitch);
794 memset(camData, 0xFF, sizeof(*buffer) * bufHeight * bufPitch);
795 camWidth = width;
796 camHeight = bufHeight;
797 camStride = bufPitch;
798 }
799 size_t i;
800 for (i = 0; i < height; ++i) {
801 memcpy(&camData[camStride * i], &buffer[pitch * i / sizeof(*buffer)], pitch);
802 }
803}
804
805static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
806 UNUSED(image);
807 UNUSED(colorFormats);
808
809 if (camData) {
810 free(camData);
811 }
812 camData = NULL;
813 imcapWidth = w;
814 imcapHeight = h;
815 cam.start();
816}
817
818static void _stopImage(struct mImageSource* image) {
819 UNUSED(image);
820 cam.stop();
821}
822
823static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
824 UNUSED(image);
825 if (!camData) {
826 cam.start();
827 *buffer = NULL;
828 return;
829 }
830 size_t offset = 0;
831 if (imcapWidth < camWidth) {
832 offset += (camWidth - imcapWidth) / 2;
833 }
834 if (imcapHeight < camHeight) {
835 offset += (camHeight - imcapHeight) / 2 * camStride;
836 }
837
838 *buffer = &camData[offset];
839 *stride = camStride;
840 *colorFormat = mCOLOR_XRGB8;
841}