src/platform/libretro/libretro.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "libretro.h"
7
8#include <mgba-util/common.h>
9
10#include <mgba/core/blip_buf.h>
11#include <mgba/core/cheats.h>
12#include <mgba/core/core.h>
13#include <mgba/core/log.h>
14#include <mgba/core/serialize.h>
15#include <mgba/core/version.h>
16#ifdef M_CORE_GB
17#include <mgba/gb/core.h>
18#include <mgba/internal/gb/gb.h>
19#include <mgba/internal/gb/mbc.h>
20#endif
21#ifdef M_CORE_GBA
22#include <mgba/gba/core.h>
23#include <mgba/gba/interface.h>
24#include <mgba/internal/gba/gba.h>
25#endif
26#include <mgba-util/memory.h>
27#include <mgba-util/vfs.h>
28
29#include "libretro_core_options.h"
30
31#define SAMPLES 1024
32#define RUMBLE_PWM 35
33
34static retro_environment_t environCallback;
35static retro_video_refresh_t videoCallback;
36static retro_audio_sample_batch_t audioCallback;
37static retro_input_poll_t inputPollCallback;
38static retro_input_state_t inputCallback;
39static retro_log_printf_t logCallback;
40static retro_set_rumble_state_t rumbleCallback;
41
42static void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args);
43
44static void _postAudioBuffer(struct mAVStream*, blip_t* left, blip_t* right);
45static void _setRumble(struct mRumble* rumble, int enable);
46static uint8_t _readLux(struct GBALuminanceSource* lux);
47static void _updateLux(struct GBALuminanceSource* lux);
48static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch);
49static void _startImage(struct mImageSource*, unsigned w, unsigned h, int colorFormats);
50static void _stopImage(struct mImageSource*);
51static void _requestImage(struct mImageSource*, const void** buffer, size_t* stride, enum mColorFormat* colorFormat);
52
53static struct mCore* core;
54static color_t* outputBuffer = NULL;
55static void* data;
56static size_t dataSize;
57static void* savedata;
58static struct mAVStream stream;
59static int rumbleUp;
60static int rumbleDown;
61static struct mRumble rumble;
62static struct GBALuminanceSource lux;
63static int luxLevel;
64static struct mLogger logger;
65static struct retro_camera_callback cam;
66static struct mImageSource imageSource;
67static uint32_t* camData = NULL;
68static unsigned camWidth;
69static unsigned camHeight;
70static unsigned imcapWidth;
71static unsigned imcapHeight;
72static size_t camStride;
73
74static void _reloadSettings(void) {
75 struct mCoreOptions opts = {
76 .useBios = true,
77 .volume = 0x100,
78 };
79
80 struct retro_variable var;
81#ifdef M_CORE_GB
82 enum GBModel model;
83 const char* modelName;
84
85 var.key = "mgba_gb_model";
86 var.value = 0;
87 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
88 if (strcmp(var.value, "Game Boy") == 0) {
89 model = GB_MODEL_DMG;
90 } else if (strcmp(var.value, "Super Game Boy") == 0) {
91 model = GB_MODEL_SGB;
92 } else if (strcmp(var.value, "Game Boy Color") == 0) {
93 model = GB_MODEL_CGB;
94 } else if (strcmp(var.value, "Game Boy Advance") == 0) {
95 model = GB_MODEL_AGB;
96 } else {
97 model = GB_MODEL_AUTODETECT;
98 }
99
100 modelName = GBModelToName(model);
101 mCoreConfigSetDefaultValue(&core->config, "gb.model", modelName);
102 mCoreConfigSetDefaultValue(&core->config, "sgb.model", modelName);
103 mCoreConfigSetDefaultValue(&core->config, "cgb.model", modelName);
104 }
105#endif
106
107 var.key = "mgba_use_bios";
108 var.value = 0;
109 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
110 opts.useBios = strcmp(var.value, "ON") == 0;
111 }
112
113 var.key = "mgba_skip_bios";
114 var.value = 0;
115 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
116 opts.skipBios = strcmp(var.value, "ON") == 0;
117 }
118
119#ifdef M_CORE_GB
120 var.key = "mgba_sgb_borders";
121 var.value = 0;
122 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
123 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", strcmp(var.value, "ON") == 0);
124 }
125#endif
126
127 var.key = "mgba_frameskip";
128 var.value = 0;
129 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
130 opts.frameskip = strtol(var.value, NULL, 10);
131 }
132
133 var.key = "mgba_idle_optimization";
134 var.value = 0;
135 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
136 if (strcmp(var.value, "Don't Remove") == 0) {
137 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
138 } else if (strcmp(var.value, "Remove Known") == 0) {
139 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
140 } else if (strcmp(var.value, "Detect and Remove") == 0) {
141 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
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 libretro_set_core_options(environCallback);
157}
158
159void retro_set_video_refresh(retro_video_refresh_t video) {
160 videoCallback = video;
161}
162
163void retro_set_audio_sample(retro_audio_sample_t audio) {
164 UNUSED(audio);
165}
166
167void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
168 audioCallback = audioBatch;
169}
170
171void retro_set_input_poll(retro_input_poll_t inputPoll) {
172 inputPollCallback = inputPoll;
173}
174
175void retro_set_input_state(retro_input_state_t input) {
176 inputCallback = input;
177}
178
179void retro_get_system_info(struct retro_system_info* info) {
180 info->need_fullpath = false;
181#ifdef M_CORE_GB
182 info->valid_extensions = "gba|gb|gbc|sgb";
183#else
184 info->valid_extensions = "gba";
185#endif
186 info->library_version = projectVersion;
187 info->library_name = projectName;
188 info->block_extract = false;
189}
190
191void retro_get_system_av_info(struct retro_system_av_info* info) {
192 unsigned width, height;
193 core->desiredVideoDimensions(core, &width, &height);
194 info->geometry.base_width = width;
195 info->geometry.base_height = height;
196#ifdef M_CORE_GB
197 if (core->platform(core) == PLATFORM_GB) {
198 info->geometry.max_width = 256;
199 info->geometry.max_height = 224;
200 } else
201#endif
202 {
203 info->geometry.max_width = width;
204 info->geometry.max_height = height;
205 }
206
207 info->geometry.aspect_ratio = width / (double) height;
208 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
209 info->timing.sample_rate = 32768;
210}
211
212void retro_init(void) {
213 enum retro_pixel_format fmt;
214#ifdef COLOR_16_BIT
215#ifdef COLOR_5_6_5
216 fmt = RETRO_PIXEL_FORMAT_RGB565;
217#else
218#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
219 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
220#endif
221#else
222#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
223 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
224#endif
225 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
226
227 struct retro_input_descriptor inputDescriptors[] = {
228 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
229 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
230 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
231 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
232 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
233 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
234 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
235 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
236 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
237 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
238 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
239 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
240 { 0 }
241 };
242 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
243
244 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
245
246 struct retro_rumble_interface rumbleInterface;
247 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
248 rumbleCallback = rumbleInterface.set_rumble_state;
249 rumble.setRumble = _setRumble;
250 } else {
251 rumbleCallback = 0;
252 }
253
254 luxLevel = 0;
255 lux.readLuminance = _readLux;
256 lux.sample = _updateLux;
257 _updateLux(&lux);
258
259 struct retro_log_callback log;
260 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
261 logCallback = log.log;
262 } else {
263 logCallback = 0;
264 }
265 logger.log = GBARetroLog;
266 mLogSetDefaultLogger(&logger);
267
268 stream.videoDimensionsChanged = 0;
269 stream.postAudioFrame = 0;
270 stream.postAudioBuffer = _postAudioBuffer;
271 stream.postVideoFrame = 0;
272
273 imageSource.startRequestImage = _startImage;
274 imageSource.stopRequestImage = _stopImage;
275 imageSource.requestImage = _requestImage;
276}
277
278void retro_deinit(void) {
279 free(outputBuffer);
280}
281
282void retro_run(void) {
283 uint16_t keys;
284 inputPollCallback();
285
286 bool updated = false;
287 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
288 struct retro_variable var = {
289 .key = "mgba_allow_opposing_directions",
290 .value = 0
291 };
292 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
293 mCoreConfigSetIntValue(&core->config, "allowOpposingDirections", strcmp(var.value, "yes") == 0);
294 core->reloadConfigOption(core, "allowOpposingDirections", NULL);
295 }
296
297 var.key = "mgba_frameskip";
298 var.value = 0;
299 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
300 mCoreConfigSetIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
301 core->reloadConfigOption(core, "frameskip", NULL);
302 }
303 }
304
305 keys = 0;
306 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
307 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
308 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
309 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
310 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
311 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
312 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
313 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
314 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
315 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
316 core->setKeys(core, keys);
317
318 static bool wasAdjustingLux = false;
319 if (wasAdjustingLux) {
320 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
321 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
322 } else {
323 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
324 ++luxLevel;
325 if (luxLevel > 10) {
326 luxLevel = 10;
327 }
328 wasAdjustingLux = true;
329 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
330 --luxLevel;
331 if (luxLevel < 0) {
332 luxLevel = 0;
333 }
334 wasAdjustingLux = true;
335 }
336 }
337
338 core->runFrame(core);
339 unsigned width, height;
340 core->desiredVideoDimensions(core, &width, &height);
341 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
342
343 if (rumbleCallback) {
344 if (rumbleUp) {
345 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
346 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
347 } else {
348 rumbleCallback(0, RETRO_RUMBLE_STRONG, 0);
349 rumbleCallback(0, RETRO_RUMBLE_WEAK, 0);
350 }
351 rumbleUp = 0;
352 rumbleDown = 0;
353 }
354}
355
356static void _setupMaps(struct mCore* core) {
357#ifdef M_CORE_GBA
358 if (core->platform(core) == PLATFORM_GBA) {
359 struct GBA* gba = core->board;
360 struct retro_memory_descriptor descs[11];
361 struct retro_memory_map mmaps;
362 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
363
364 memset(descs, 0, sizeof(descs));
365 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
366
367 /* Map internal working RAM */
368 descs[0].ptr = gba->memory.iwram;
369 descs[0].start = BASE_WORKING_IRAM;
370 descs[0].len = SIZE_WORKING_IRAM;
371 descs[0].select = 0xFF000000;
372
373 /* Map working RAM */
374 descs[1].ptr = gba->memory.wram;
375 descs[1].start = BASE_WORKING_RAM;
376 descs[1].len = SIZE_WORKING_RAM;
377 descs[1].select = 0xFF000000;
378
379 /* Map save RAM */
380 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
381 descs[2].ptr = savedataSize ? savedata : NULL;
382 descs[2].start = BASE_CART_SRAM;
383 descs[2].len = savedataSize;
384
385 /* Map ROM */
386 descs[3].ptr = gba->memory.rom;
387 descs[3].start = BASE_CART0;
388 descs[3].len = romSize;
389 descs[3].flags = RETRO_MEMDESC_CONST;
390
391 descs[4].ptr = gba->memory.rom;
392 descs[4].start = BASE_CART1;
393 descs[4].len = romSize;
394 descs[4].flags = RETRO_MEMDESC_CONST;
395
396 descs[5].ptr = gba->memory.rom;
397 descs[5].start = BASE_CART2;
398 descs[5].len = romSize;
399 descs[5].flags = RETRO_MEMDESC_CONST;
400
401 /* Map BIOS */
402 descs[6].ptr = gba->memory.bios;
403 descs[6].start = BASE_BIOS;
404 descs[6].len = SIZE_BIOS;
405 descs[6].flags = RETRO_MEMDESC_CONST;
406
407 /* Map VRAM */
408 descs[7].ptr = gba->video.vram;
409 descs[7].start = BASE_VRAM;
410 descs[7].len = SIZE_VRAM;
411 descs[7].select = 0xFF000000;
412
413 /* Map palette RAM */
414 descs[8].ptr = gba->video.palette;
415 descs[8].start = BASE_PALETTE_RAM;
416 descs[8].len = SIZE_PALETTE_RAM;
417 descs[8].select = 0xFF000000;
418
419 /* Map OAM */
420 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
421 descs[9].start = BASE_OAM;
422 descs[9].len = SIZE_OAM;
423 descs[9].select = 0xFF000000;
424
425 /* Map mmapped I/O */
426 descs[10].ptr = gba->memory.io;
427 descs[10].start = BASE_IO;
428 descs[10].len = SIZE_IO;
429
430 mmaps.descriptors = descs;
431 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
432
433 bool yes = true;
434 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
435 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
436 }
437#endif
438#ifdef M_CORE_GB
439 if (core->platform(core) == PLATFORM_GB) {
440 struct GB* gb = core->board;
441 struct retro_memory_descriptor descs[11];
442 struct retro_memory_map mmaps;
443
444 memset(descs, 0, sizeof(descs));
445 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
446
447 unsigned i = 0;
448
449 /* Map ROM */
450 descs[i].ptr = gb->memory.rom;
451 descs[i].start = GB_BASE_CART_BANK0;
452 descs[i].len = GB_SIZE_CART_BANK0;
453 descs[i].flags = RETRO_MEMDESC_CONST;
454 i++;
455
456 descs[i].ptr = gb->memory.rom;
457 descs[i].offset = GB_SIZE_CART_BANK0;
458 descs[i].start = GB_BASE_CART_BANK1;
459 descs[i].len = GB_SIZE_CART_BANK0;
460 descs[i].flags = RETRO_MEMDESC_CONST;
461 i++;
462
463 /* Map VRAM */
464 descs[i].ptr = gb->video.vram;
465 descs[i].start = GB_BASE_VRAM;
466 descs[i].len = GB_SIZE_VRAM_BANK0;
467 i++;
468
469 /* Map working RAM */
470 descs[i].ptr = gb->memory.wram;
471 descs[i].start = GB_BASE_WORKING_RAM_BANK0;
472 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
473 i++;
474
475 descs[i].ptr = gb->memory.wram;
476 descs[i].offset = GB_SIZE_WORKING_RAM_BANK0;
477 descs[i].start = GB_BASE_WORKING_RAM_BANK1;
478 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
479 i++;
480
481 /* Map OAM */
482 descs[i].ptr = &gb->video.oam; /* video.oam is a structure */
483 descs[i].start = GB_BASE_OAM;
484 descs[i].len = GB_SIZE_OAM;
485 descs[i].select = 0xFFFFFF60;
486 i++;
487
488 /* Map mmapped I/O */
489 descs[i].ptr = gb->memory.io;
490 descs[i].start = GB_BASE_IO;
491 descs[i].len = GB_SIZE_IO;
492 i++;
493
494 /* Map High RAM */
495 descs[i].ptr = gb->memory.hram;
496 descs[i].start = GB_BASE_HRAM;
497 descs[i].len = GB_SIZE_HRAM;
498 descs[i].select = 0xFFFFFF80;
499 i++;
500
501 /* Map IE Register */
502 descs[i].ptr = &gb->memory.ie;
503 descs[i].start = GB_BASE_IE;
504 descs[i].len = 1;
505 i++;
506
507 /* Map External RAM */
508 if (gb->memory.sram) {
509 descs[i].ptr = gb->memory.sram;
510 descs[i].start = GB_BASE_EXTERNAL_RAM;
511 descs[i].len = savedataSize;
512 i++;
513 }
514
515 if (gb->model >= GB_MODEL_CGB) {
516 /* Map working RAM */
517 /* banks 2-7 of wram mapped in virtual address so it can be
518 * accessed without bank switching, GBC only */
519 descs[i].ptr = gb->memory.wram + 0x2000;
520 descs[i].start = 0x10000;
521 descs[i].len = GB_SIZE_WORKING_RAM - 0x2000;
522 descs[i].select = 0xFFFFA000;
523 i++;
524 }
525
526 mmaps.descriptors = descs;
527 mmaps.num_descriptors = i;
528
529 bool yes = true;
530 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
531 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
532 }
533#endif
534}
535
536void retro_reset(void) {
537 core->reset(core);
538 _setupMaps(core);
539
540 rumbleUp = 0;
541 rumbleDown = 0;
542}
543
544bool retro_load_game(const struct retro_game_info* game) {
545 struct VFile* rom;
546 if (game->data) {
547 data = anonymousMemoryMap(game->size);
548 dataSize = game->size;
549 memcpy(data, game->data, game->size);
550 rom = VFileFromMemory(data, game->size);
551 } else {
552 data = 0;
553 rom = VFileOpen(game->path, O_RDONLY);
554 }
555 if (!rom) {
556 return false;
557 }
558
559 core = mCoreFindVF(rom);
560 if (!core) {
561 rom->close(rom);
562 mappedMemoryFree(data, game->size);
563 return false;
564 }
565 mCoreInitConfig(core, NULL);
566 core->init(core);
567 core->setAVStream(core, &stream);
568
569 size_t size = 256 * 224 * BYTES_PER_PIXEL;
570 outputBuffer = malloc(size);
571 memset(outputBuffer, 0xFF, size);
572 core->setVideoBuffer(core, outputBuffer, 256);
573
574 core->setAudioBufferSize(core, SAMPLES);
575
576 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
577 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
578
579 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
580
581 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
582 memset(savedata, 0xFF, SIZE_CART_FLASH1M);
583 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
584
585 _reloadSettings();
586 core->loadROM(core, rom);
587 core->loadSave(core, save);
588
589 const char* sysDir = 0;
590 const char* biosName = 0;
591 char biosPath[PATH_MAX];
592 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
593
594#ifdef M_CORE_GBA
595 if (core->platform(core) == PLATFORM_GBA) {
596 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
597 biosName = "gba_bios.bin";
598
599 }
600#endif
601
602#ifdef M_CORE_GB
603 if (core->platform(core) == PLATFORM_GB) {
604 memset(&cam, 0, sizeof(cam));
605 cam.height = GBCAM_HEIGHT;
606 cam.width = GBCAM_WIDTH;
607 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
608 cam.frame_raw_framebuffer = _updateCamera;
609 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
610
611 environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam);
612 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
613 struct GB* gb = core->board;
614
615 if (modelName) {
616 gb->model = GBNameToModel(modelName);
617 } else {
618 GBDetectModel(gb);
619 }
620
621 switch (gb->model) {
622 case GB_MODEL_AGB:
623 case GB_MODEL_CGB:
624 biosName = "gbc_bios.bin";
625 break;
626 case GB_MODEL_SGB:
627 biosName = "sgb_bios.bin";
628 break;
629 case GB_MODEL_DMG:
630 default:
631 biosName = "gb_bios.bin";
632 break;
633 }
634 }
635#endif
636
637 if (core->opts.useBios && sysDir && biosName) {
638 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
639 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
640 if (bios) {
641 core->loadBIOS(core, bios, 0);
642 }
643 }
644
645 core->reset(core);
646 _setupMaps(core);
647
648 return true;
649}
650
651void retro_unload_game(void) {
652 if (!core) {
653 return;
654 }
655 mCoreConfigDeinit(&core->config);
656 core->deinit(core);
657 mappedMemoryFree(data, dataSize);
658 data = 0;
659 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
660 savedata = 0;
661}
662
663size_t retro_serialize_size(void) {
664 struct VFile* vfm = VFileMemChunk(NULL, 0);
665 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
666 size_t size = vfm->size(vfm);
667 vfm->close(vfm);
668 return size;
669}
670
671bool retro_serialize(void* data, size_t size) {
672 struct VFile* vfm = VFileMemChunk(NULL, 0);
673 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
674 if ((ssize_t) size > vfm->size(vfm)) {
675 size = vfm->size(vfm);
676 } else if ((ssize_t) size < vfm->size(vfm)) {
677 vfm->close(vfm);
678 return false;
679 }
680 vfm->seek(vfm, 0, SEEK_SET);
681 vfm->read(vfm, data, size);
682 vfm->close(vfm);
683 return true;
684}
685
686bool retro_unserialize(const void* data, size_t size) {
687 struct VFile* vfm = VFileFromConstMemory(data, size);
688 bool success = mCoreLoadStateNamed(core, vfm, SAVESTATE_RTC);
689 vfm->close(vfm);
690 return success;
691}
692
693void retro_cheat_reset(void) {
694 mCheatDeviceClear(core->cheatDevice(core));
695}
696
697void retro_cheat_set(unsigned index, bool enabled, const char* code) {
698 UNUSED(index);
699 UNUSED(enabled);
700 struct mCheatDevice* device = core->cheatDevice(core);
701 struct mCheatSet* cheatSet = NULL;
702 if (mCheatSetsSize(&device->cheats)) {
703 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
704 } else {
705 cheatSet = device->createSet(device, NULL);
706 mCheatAddSet(device, cheatSet);
707 }
708// Convert the super wonky unportable libretro format to something normal
709#ifdef M_CORE_GBA
710 if (core->platform(core) == PLATFORM_GBA) {
711 char realCode[] = "XXXXXXXX XXXXXXXX";
712 size_t len = strlen(code) + 1; // Include null terminator
713 size_t i, pos;
714 for (i = 0, pos = 0; i < len; ++i) {
715 if (isspace((int) code[i]) || code[i] == '+') {
716 realCode[pos] = ' ';
717 } else {
718 realCode[pos] = code[i];
719 }
720 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
721 realCode[pos] = '\0';
722 mCheatAddLine(cheatSet, realCode, 0);
723 pos = 0;
724 continue;
725 }
726 ++pos;
727 }
728 }
729#endif
730#ifdef M_CORE_GB
731 if (core->platform(core) == PLATFORM_GB) {
732 char realCode[] = "XXX-XXX-XXX";
733 size_t len = strlen(code) + 1; // Include null terminator
734 size_t i, pos;
735 for (i = 0, pos = 0; i < len; ++i) {
736 if (isspace((int) code[i]) || code[i] == '+') {
737 realCode[pos] = '\0';
738 } else {
739 realCode[pos] = code[i];
740 }
741 if (pos == 11 || !realCode[pos]) {
742 realCode[pos] = '\0';
743 mCheatAddLine(cheatSet, realCode, 0);
744 pos = 0;
745 continue;
746 }
747 ++pos;
748 }
749 }
750#endif
751 cheatSet->refresh(cheatSet, device);
752}
753
754unsigned retro_get_region(void) {
755 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
756}
757
758void retro_set_controller_port_device(unsigned port, unsigned device) {
759 UNUSED(port);
760 UNUSED(device);
761}
762
763bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
764 UNUSED(game_type);
765 UNUSED(info);
766 UNUSED(num_info);
767 return false;
768}
769
770void* retro_get_memory_data(unsigned id) {
771 if (id != RETRO_MEMORY_SAVE_RAM) {
772 return 0;
773 }
774 return savedata;
775}
776
777size_t retro_get_memory_size(unsigned id) {
778 if (id != RETRO_MEMORY_SAVE_RAM) {
779 return 0;
780 }
781#ifdef M_CORE_GBA
782 if (core->platform(core) == PLATFORM_GBA) {
783 switch (((struct GBA*) core->board)->memory.savedata.type) {
784 case SAVEDATA_AUTODETECT:
785 return SIZE_CART_FLASH1M;
786 default:
787 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
788 }
789 }
790#endif
791#ifdef M_CORE_GB
792 if (core->platform(core) == PLATFORM_GB) {
793 return ((struct GB*) core->board)->sramSize;
794 }
795#endif
796 return 0;
797}
798
799void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
800 UNUSED(logger);
801 if (!logCallback) {
802 return;
803 }
804
805 char message[128];
806 vsnprintf(message, sizeof(message), format, args);
807
808 enum retro_log_level retroLevel = RETRO_LOG_INFO;
809 switch (level) {
810 case mLOG_ERROR:
811 case mLOG_FATAL:
812 retroLevel = RETRO_LOG_ERROR;
813 break;
814 case mLOG_WARN:
815 retroLevel = RETRO_LOG_WARN;
816 break;
817 case mLOG_INFO:
818 retroLevel = RETRO_LOG_INFO;
819 break;
820 case mLOG_GAME_ERROR:
821 case mLOG_STUB:
822#ifdef NDEBUG
823 return;
824#else
825 retroLevel = RETRO_LOG_DEBUG;
826 break;
827#endif
828 case mLOG_DEBUG:
829 retroLevel = RETRO_LOG_DEBUG;
830 break;
831 }
832#ifdef NDEBUG
833 static int biosCat = -1;
834 if (biosCat < 0) {
835 biosCat = mLogCategoryById("gba.bios");
836 }
837
838 if (category == biosCat) {
839 return;
840 }
841#endif
842 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
843}
844
845static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
846 UNUSED(stream);
847 int16_t samples[SAMPLES * 2];
848 blip_read_samples(left, samples, SAMPLES, true);
849 blip_read_samples(right, samples + 1, SAMPLES, true);
850 audioCallback(samples, SAMPLES);
851}
852
853static void _setRumble(struct mRumble* rumble, int enable) {
854 UNUSED(rumble);
855 if (!rumbleCallback) {
856 return;
857 }
858 if (enable) {
859 ++rumbleUp;
860 } else {
861 ++rumbleDown;
862 }
863}
864
865static void _updateLux(struct GBALuminanceSource* lux) {
866 UNUSED(lux);
867 struct retro_variable var = {
868 .key = "mgba_solar_sensor_level",
869 .value = 0
870 };
871
872 bool updated = false;
873 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
874 return;
875 }
876 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
877 return;
878 }
879
880 char* end;
881 int newLuxLevel = strtol(var.value, &end, 10);
882 if (!*end) {
883 if (newLuxLevel > 10) {
884 luxLevel = 10;
885 } else if (newLuxLevel < 0) {
886 luxLevel = 0;
887 } else {
888 luxLevel = newLuxLevel;
889 }
890 }
891}
892
893static uint8_t _readLux(struct GBALuminanceSource* lux) {
894 UNUSED(lux);
895 int value = 0x16;
896 if (luxLevel > 0) {
897 value += GBA_LUX_LEVELS[luxLevel - 1];
898 }
899 return 0xFF - value;
900}
901
902static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
903 if (!camData || width > camWidth || height > camHeight) {
904 if (camData) {
905 free(camData);
906 camData = NULL;
907 }
908 unsigned bufPitch = pitch / sizeof(*buffer);
909 unsigned bufHeight = height;
910 if (imcapWidth > bufPitch) {
911 bufPitch = imcapWidth;
912 }
913 if (imcapHeight > bufHeight) {
914 bufHeight = imcapHeight;
915 }
916 camData = malloc(sizeof(*buffer) * bufHeight * bufPitch);
917 memset(camData, 0xFF, sizeof(*buffer) * bufHeight * bufPitch);
918 camWidth = width;
919 camHeight = bufHeight;
920 camStride = bufPitch;
921 }
922 size_t i;
923 for (i = 0; i < height; ++i) {
924 memcpy(&camData[camStride * i], &buffer[pitch * i / sizeof(*buffer)], pitch);
925 }
926}
927
928static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
929 UNUSED(image);
930 UNUSED(colorFormats);
931
932 if (camData) {
933 free(camData);
934 }
935 camData = NULL;
936 imcapWidth = w;
937 imcapHeight = h;
938 cam.start();
939}
940
941static void _stopImage(struct mImageSource* image) {
942 UNUSED(image);
943 cam.stop();
944}
945
946static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
947 UNUSED(image);
948 if (!camData) {
949 cam.start();
950 *buffer = NULL;
951 return;
952 }
953 size_t offset = 0;
954 if (imcapWidth < camWidth) {
955 offset += (camWidth - imcapWidth) / 2;
956 }
957 if (imcapHeight < camHeight) {
958 offset += (camHeight - imcapHeight) / 2 * camStride;
959 }
960
961 *buffer = &camData[offset];
962 *stride = camStride;
963 *colorFormat = mCOLOR_XRGB8;
964}