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 stream.videoFrameRateChanged = 0;
280
281 imageSource.startRequestImage = _startImage;
282 imageSource.stopRequestImage = _stopImage;
283 imageSource.requestImage = _requestImage;
284}
285
286void retro_deinit(void) {
287 free(outputBuffer);
288}
289
290void retro_run(void) {
291 uint16_t keys;
292 inputPollCallback();
293
294 bool updated = false;
295 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
296 struct retro_variable var = {
297 .key = "mgba_allow_opposing_directions",
298 .value = 0
299 };
300 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
301 struct GBA* gba = core->board;
302 struct GB* gb = core->board;
303 switch (core->platform(core)) {
304 case PLATFORM_GBA:
305 gba->allowOpposingDirections = strcmp(var.value, "yes") == 0;
306 break;
307 case PLATFORM_GB:
308 gb->allowOpposingDirections = strcmp(var.value, "yes") == 0;
309 break;
310 default:
311 break;
312 }
313 }
314
315 var.key = "mgba_frameskip";
316 var.value = 0;
317 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
318 mCoreConfigSetUIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
319 mCoreLoadConfig(core);
320 }
321 }
322
323 keys = 0;
324 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
325 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
326 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
327 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
328 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
329 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
330 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
331 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
332 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
333 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
334 core->setKeys(core, keys);
335
336 static bool wasAdjustingLux = false;
337 if (wasAdjustingLux) {
338 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
339 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
340 } else {
341 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
342 ++luxLevel;
343 if (luxLevel > 10) {
344 luxLevel = 10;
345 }
346 wasAdjustingLux = true;
347 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
348 --luxLevel;
349 if (luxLevel < 0) {
350 luxLevel = 0;
351 }
352 wasAdjustingLux = true;
353 }
354 }
355
356 core->runFrame(core);
357 unsigned width, height;
358 core->desiredVideoDimensions(core, &width, &height);
359 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
360
361 if (rumbleCallback) {
362 if (rumbleUp) {
363 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
364 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
365 } else {
366 rumbleCallback(0, RETRO_RUMBLE_STRONG, 0);
367 rumbleCallback(0, RETRO_RUMBLE_WEAK, 0);
368 }
369 rumbleUp = 0;
370 rumbleDown = 0;
371 }
372}
373
374static void _setupMaps(struct mCore* core) {
375#ifdef M_CORE_GBA
376 if (core->platform(core) == PLATFORM_GBA) {
377 struct GBA* gba = core->board;
378 struct retro_memory_descriptor descs[11];
379 struct retro_memory_map mmaps;
380 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
381
382 memset(descs, 0, sizeof(descs));
383 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
384
385 /* Map internal working RAM */
386 descs[0].ptr = gba->memory.iwram;
387 descs[0].start = BASE_WORKING_IRAM;
388 descs[0].len = SIZE_WORKING_IRAM;
389 descs[0].select = 0xFF000000;
390
391 /* Map working RAM */
392 descs[1].ptr = gba->memory.wram;
393 descs[1].start = BASE_WORKING_RAM;
394 descs[1].len = SIZE_WORKING_RAM;
395 descs[1].select = 0xFF000000;
396
397 /* Map save RAM */
398 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
399 descs[2].ptr = savedataSize ? savedata : NULL;
400 descs[2].start = BASE_CART_SRAM;
401 descs[2].len = savedataSize;
402
403 /* Map ROM */
404 descs[3].ptr = gba->memory.rom;
405 descs[3].start = BASE_CART0;
406 descs[3].len = romSize;
407 descs[3].flags = RETRO_MEMDESC_CONST;
408
409 descs[4].ptr = gba->memory.rom;
410 descs[4].start = BASE_CART1;
411 descs[4].len = romSize;
412 descs[4].flags = RETRO_MEMDESC_CONST;
413
414 descs[5].ptr = gba->memory.rom;
415 descs[5].start = BASE_CART2;
416 descs[5].len = romSize;
417 descs[5].flags = RETRO_MEMDESC_CONST;
418
419 /* Map BIOS */
420 descs[6].ptr = gba->memory.bios;
421 descs[6].start = BASE_BIOS;
422 descs[6].len = SIZE_BIOS;
423 descs[6].flags = RETRO_MEMDESC_CONST;
424
425 /* Map VRAM */
426 descs[7].ptr = gba->video.vram;
427 descs[7].start = BASE_VRAM;
428 descs[7].len = SIZE_VRAM;
429 descs[7].select = 0xFF000000;
430
431 /* Map palette RAM */
432 descs[8].ptr = gba->video.palette;
433 descs[8].start = BASE_PALETTE_RAM;
434 descs[8].len = SIZE_PALETTE_RAM;
435 descs[8].select = 0xFF000000;
436
437 /* Map OAM */
438 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
439 descs[9].start = BASE_OAM;
440 descs[9].len = SIZE_OAM;
441 descs[9].select = 0xFF000000;
442
443 /* Map mmapped I/O */
444 descs[10].ptr = gba->memory.io;
445 descs[10].start = BASE_IO;
446 descs[10].len = SIZE_IO;
447
448 mmaps.descriptors = descs;
449 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
450
451 bool yes = true;
452 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
453 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
454 }
455#endif
456}
457
458void retro_reset(void) {
459 core->reset(core);
460 _setupMaps(core);
461
462 rumbleUp = 0;
463 rumbleDown = 0;
464}
465
466bool retro_load_game(const struct retro_game_info* game) {
467 struct VFile* rom;
468 if (game->data) {
469 data = anonymousMemoryMap(game->size);
470 dataSize = game->size;
471 memcpy(data, game->data, game->size);
472 rom = VFileFromMemory(data, game->size);
473 } else {
474 data = 0;
475 rom = VFileOpen(game->path, O_RDONLY);
476 }
477 if (!rom) {
478 return false;
479 }
480
481 core = mCoreFindVF(rom);
482 if (!core) {
483 rom->close(rom);
484 mappedMemoryFree(data, game->size);
485 return false;
486 }
487 mCoreInitConfig(core, NULL);
488 core->init(core);
489 core->setAVStream(core, &stream);
490
491 size_t size = 256 * 224 * BYTES_PER_PIXEL;
492 outputBuffer = malloc(size);
493 memset(outputBuffer, 0xFF, size);
494 core->setVideoBuffer(core, outputBuffer, 256);
495
496 core->setAudioBufferSize(core, SAMPLES);
497
498 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
499 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
500
501 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
502
503 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
504 memset(savedata, 0xFF, SIZE_CART_FLASH1M);
505 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
506
507 _reloadSettings();
508 core->loadROM(core, rom);
509 core->loadSave(core, save);
510
511 const char* sysDir = 0;
512 const char* biosName = 0;
513 char biosPath[PATH_MAX];
514 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
515
516#ifdef M_CORE_GBA
517 if (core->platform(core) == PLATFORM_GBA) {
518 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
519 biosName = "gba_bios.bin";
520
521 }
522#endif
523
524#ifdef M_CORE_GB
525 if (core->platform(core) == PLATFORM_GB) {
526 memset(&cam, 0, sizeof(cam));
527 cam.height = GBCAM_HEIGHT;
528 cam.width = GBCAM_WIDTH;
529 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
530 cam.frame_raw_framebuffer = _updateCamera;
531 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
532
533 environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam);
534 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
535 struct GB* gb = core->board;
536
537 if (modelName) {
538 gb->model = GBNameToModel(modelName);
539 } else {
540 GBDetectModel(gb);
541 }
542
543 switch (gb->model) {
544 case GB_MODEL_AGB:
545 case GB_MODEL_CGB:
546 biosName = "gbc_bios.bin";
547 break;
548 case GB_MODEL_SGB:
549 biosName = "sgb_bios.bin";
550 break;
551 case GB_MODEL_DMG:
552 default:
553 biosName = "gb_bios.bin";
554 break;
555 }
556 }
557#endif
558
559 if (core->opts.useBios && sysDir && biosName) {
560 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
561 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
562 if (bios) {
563 core->loadBIOS(core, bios, 0);
564 }
565 }
566
567 core->reset(core);
568 _setupMaps(core);
569
570 return true;
571}
572
573void retro_unload_game(void) {
574 if (!core) {
575 return;
576 }
577 mCoreConfigDeinit(&core->config);
578 core->deinit(core);
579 mappedMemoryFree(data, dataSize);
580 data = 0;
581 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
582 savedata = 0;
583}
584
585size_t retro_serialize_size(void) {
586 struct VFile* vfm = VFileMemChunk(NULL, 0);
587 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
588 size_t size = vfm->size(vfm);
589 vfm->close(vfm);
590 return size;
591}
592
593bool retro_serialize(void* data, size_t size) {
594 struct VFile* vfm = VFileMemChunk(NULL, 0);
595 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
596 if ((ssize_t) size > vfm->size(vfm)) {
597 size = vfm->size(vfm);
598 } else if ((ssize_t) size < vfm->size(vfm)) {
599 vfm->close(vfm);
600 return false;
601 }
602 vfm->seek(vfm, 0, SEEK_SET);
603 vfm->read(vfm, data, size);
604 vfm->close(vfm);
605 return true;
606}
607
608bool retro_unserialize(const void* data, size_t size) {
609 struct VFile* vfm = VFileFromConstMemory(data, size);
610 bool success = mCoreLoadStateNamed(core, vfm, SAVESTATE_RTC);
611 vfm->close(vfm);
612 return success;
613}
614
615void retro_cheat_reset(void) {
616 mCheatDeviceClear(core->cheatDevice(core));
617}
618
619void retro_cheat_set(unsigned index, bool enabled, const char* code) {
620 UNUSED(index);
621 UNUSED(enabled);
622 struct mCheatDevice* device = core->cheatDevice(core);
623 struct mCheatSet* cheatSet = NULL;
624 if (mCheatSetsSize(&device->cheats)) {
625 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
626 } else {
627 cheatSet = device->createSet(device, NULL);
628 mCheatAddSet(device, cheatSet);
629 }
630// Convert the super wonky unportable libretro format to something normal
631#ifdef M_CORE_GBA
632 if (core->platform(core) == PLATFORM_GBA) {
633 char realCode[] = "XXXXXXXX XXXXXXXX";
634 size_t len = strlen(code) + 1; // Include null terminator
635 size_t i, pos;
636 for (i = 0, pos = 0; i < len; ++i) {
637 if (isspace((int) code[i]) || code[i] == '+') {
638 realCode[pos] = ' ';
639 } else {
640 realCode[pos] = code[i];
641 }
642 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
643 realCode[pos] = '\0';
644 mCheatAddLine(cheatSet, realCode, 0);
645 pos = 0;
646 continue;
647 }
648 ++pos;
649 }
650 }
651#endif
652#ifdef M_CORE_GB
653 if (core->platform(core) == PLATFORM_GB) {
654 char realCode[] = "XXX-XXX-XXX";
655 size_t len = strlen(code) + 1; // Include null terminator
656 size_t i, pos;
657 for (i = 0, pos = 0; i < len; ++i) {
658 if (isspace((int) code[i]) || code[i] == '+') {
659 realCode[pos] = '\0';
660 } else {
661 realCode[pos] = code[i];
662 }
663 if (pos == 11 || !realCode[pos]) {
664 realCode[pos] = '\0';
665 mCheatAddLine(cheatSet, realCode, 0);
666 pos = 0;
667 continue;
668 }
669 ++pos;
670 }
671 }
672#endif
673 cheatSet->refresh(cheatSet, device);
674}
675
676unsigned retro_get_region(void) {
677 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
678}
679
680void retro_set_controller_port_device(unsigned port, unsigned device) {
681 UNUSED(port);
682 UNUSED(device);
683}
684
685bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
686 UNUSED(game_type);
687 UNUSED(info);
688 UNUSED(num_info);
689 return false;
690}
691
692void* retro_get_memory_data(unsigned id) {
693 if (id != RETRO_MEMORY_SAVE_RAM) {
694 return 0;
695 }
696 return savedata;
697}
698
699size_t retro_get_memory_size(unsigned id) {
700 if (id != RETRO_MEMORY_SAVE_RAM) {
701 return 0;
702 }
703#ifdef M_CORE_GBA
704 if (core->platform(core) == PLATFORM_GBA) {
705 switch (((struct GBA*) core->board)->memory.savedata.type) {
706 case SAVEDATA_AUTODETECT:
707 return SIZE_CART_FLASH1M;
708 default:
709 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
710 }
711 }
712#endif
713#ifdef M_CORE_GB
714 if (core->platform(core) == PLATFORM_GB) {
715 return ((struct GB*) core->board)->sramSize;
716 }
717#endif
718 return 0;
719}
720
721void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
722 UNUSED(logger);
723 if (!logCallback) {
724 return;
725 }
726
727 char message[128];
728 vsnprintf(message, sizeof(message), format, args);
729
730 enum retro_log_level retroLevel = RETRO_LOG_INFO;
731 switch (level) {
732 case mLOG_ERROR:
733 case mLOG_FATAL:
734 retroLevel = RETRO_LOG_ERROR;
735 break;
736 case mLOG_WARN:
737 retroLevel = RETRO_LOG_WARN;
738 break;
739 case mLOG_INFO:
740 retroLevel = RETRO_LOG_INFO;
741 break;
742 case mLOG_GAME_ERROR:
743 case mLOG_STUB:
744#ifdef NDEBUG
745 return;
746#else
747 retroLevel = RETRO_LOG_DEBUG;
748 break;
749#endif
750 case mLOG_DEBUG:
751 retroLevel = RETRO_LOG_DEBUG;
752 break;
753 }
754#ifdef NDEBUG
755 static int biosCat = -1;
756 if (biosCat < 0) {
757 biosCat = mLogCategoryById("gba.bios");
758 }
759
760 if (category == biosCat) {
761 return;
762 }
763#endif
764 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
765}
766
767static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
768 UNUSED(stream);
769 int16_t samples[SAMPLES * 2];
770 blip_read_samples(left, samples, SAMPLES, true);
771 blip_read_samples(right, samples + 1, SAMPLES, true);
772 audioCallback(samples, SAMPLES);
773}
774
775static void _setRumble(struct mRumble* rumble, int enable) {
776 UNUSED(rumble);
777 if (!rumbleCallback) {
778 return;
779 }
780 if (enable) {
781 ++rumbleUp;
782 } else {
783 ++rumbleDown;
784 }
785}
786
787static void _updateLux(struct GBALuminanceSource* lux) {
788 UNUSED(lux);
789 struct retro_variable var = {
790 .key = "mgba_solar_sensor_level",
791 .value = 0
792 };
793
794 bool updated = false;
795 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
796 return;
797 }
798 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
799 return;
800 }
801
802 char* end;
803 int newLuxLevel = strtol(var.value, &end, 10);
804 if (!*end) {
805 if (newLuxLevel > 10) {
806 luxLevel = 10;
807 } else if (newLuxLevel < 0) {
808 luxLevel = 0;
809 } else {
810 luxLevel = newLuxLevel;
811 }
812 }
813}
814
815static uint8_t _readLux(struct GBALuminanceSource* lux) {
816 UNUSED(lux);
817 int value = 0x16;
818 if (luxLevel > 0) {
819 value += GBA_LUX_LEVELS[luxLevel - 1];
820 }
821 return 0xFF - value;
822}
823
824static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
825 if (!camData || width > camWidth || height > camHeight) {
826 if (camData) {
827 free(camData);
828 }
829 unsigned bufPitch = pitch / sizeof(*buffer);
830 unsigned bufHeight = height;
831 if (imcapWidth > bufPitch) {
832 bufPitch = imcapWidth;
833 }
834 if (imcapHeight > bufHeight) {
835 bufHeight = imcapHeight;
836 }
837 camData = malloc(sizeof(*buffer) * bufHeight * bufPitch);
838 memset(camData, 0xFF, sizeof(*buffer) * bufHeight * bufPitch);
839 camWidth = width;
840 camHeight = bufHeight;
841 camStride = bufPitch;
842 }
843 size_t i;
844 for (i = 0; i < height; ++i) {
845 memcpy(&camData[camStride * i], &buffer[pitch * i / sizeof(*buffer)], pitch);
846 }
847}
848
849static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
850 UNUSED(image);
851 UNUSED(colorFormats);
852
853 if (camData) {
854 free(camData);
855 }
856 camData = NULL;
857 imcapWidth = w;
858 imcapHeight = h;
859 cam.start();
860}
861
862static void _stopImage(struct mImageSource* image) {
863 UNUSED(image);
864 cam.stop();
865}
866
867static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
868 UNUSED(image);
869 if (!camData) {
870 cam.start();
871 *buffer = NULL;
872 return;
873 }
874 size_t offset = 0;
875 if (imcapWidth < camWidth) {
876 offset += (camWidth - imcapWidth) / 2;
877 }
878 if (imcapHeight < camHeight) {
879 offset += (camHeight - imcapHeight) / 2 * camStride;
880 }
881
882 *buffer = &camData[offset];
883 *stride = camStride;
884 *colorFormat = mCOLOR_XRGB8;
885}