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