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#ifdef M_CORE_GBA
146 var.key = "mgba_force_gbp";
147 var.value = 0;
148 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
149 mCoreConfigSetDefaultIntValue(&core->config, "gba.forceGbp", strcmp(var.value, "ON") == 0);
150 }
151#endif
152
153 mCoreConfigLoadDefaults(&core->config, &opts);
154 mCoreLoadConfig(core);
155}
156
157unsigned retro_api_version(void) {
158 return RETRO_API_VERSION;
159}
160
161void retro_set_environment(retro_environment_t env) {
162 environCallback = env;
163
164 libretro_set_core_options(environCallback);
165}
166
167void retro_set_video_refresh(retro_video_refresh_t video) {
168 videoCallback = video;
169}
170
171void retro_set_audio_sample(retro_audio_sample_t audio) {
172 UNUSED(audio);
173}
174
175void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
176 audioCallback = audioBatch;
177}
178
179void retro_set_input_poll(retro_input_poll_t inputPoll) {
180 inputPollCallback = inputPoll;
181}
182
183void retro_set_input_state(retro_input_state_t input) {
184 inputCallback = input;
185}
186
187void retro_get_system_info(struct retro_system_info* info) {
188 info->need_fullpath = false;
189#ifdef M_CORE_GB
190 info->valid_extensions = "gba|gb|gbc|sgb";
191#else
192 info->valid_extensions = "gba";
193#endif
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 rumble.setRumble = _setRumble;
258 } else {
259 rumbleCallback = 0;
260 }
261
262 luxLevel = 0;
263 lux.readLuminance = _readLux;
264 lux.sample = _updateLux;
265 _updateLux(&lux);
266
267 struct retro_log_callback log;
268 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
269 logCallback = log.log;
270 } else {
271 logCallback = 0;
272 }
273 logger.log = GBARetroLog;
274 mLogSetDefaultLogger(&logger);
275
276 stream.videoDimensionsChanged = 0;
277 stream.postAudioFrame = 0;
278 stream.postAudioBuffer = _postAudioBuffer;
279 stream.postVideoFrame = 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 mCoreConfigSetIntValue(&core->config, "allowOpposingDirections", strcmp(var.value, "yes") == 0);
302 core->reloadConfigOption(core, "allowOpposingDirections", NULL);
303 }
304
305 var.key = "mgba_frameskip";
306 var.value = 0;
307 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
308 mCoreConfigSetIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
309 core->reloadConfigOption(core, "frameskip", NULL);
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 if (rumbleCallback) {
352 if (rumbleUp) {
353 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
354 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
355 } else {
356 rumbleCallback(0, RETRO_RUMBLE_STRONG, 0);
357 rumbleCallback(0, RETRO_RUMBLE_WEAK, 0);
358 }
359 rumbleUp = 0;
360 rumbleDown = 0;
361 }
362}
363
364static void _setupMaps(struct mCore* core) {
365#ifdef M_CORE_GBA
366 if (core->platform(core) == PLATFORM_GBA) {
367 struct GBA* gba = core->board;
368 struct retro_memory_descriptor descs[11];
369 struct retro_memory_map mmaps;
370 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
371
372 memset(descs, 0, sizeof(descs));
373 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
374
375 /* Map internal working RAM */
376 descs[0].ptr = gba->memory.iwram;
377 descs[0].start = BASE_WORKING_IRAM;
378 descs[0].len = SIZE_WORKING_IRAM;
379 descs[0].select = 0xFF000000;
380
381 /* Map working RAM */
382 descs[1].ptr = gba->memory.wram;
383 descs[1].start = BASE_WORKING_RAM;
384 descs[1].len = SIZE_WORKING_RAM;
385 descs[1].select = 0xFF000000;
386
387 /* Map save RAM */
388 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
389 descs[2].ptr = savedataSize ? savedata : NULL;
390 descs[2].start = BASE_CART_SRAM;
391 descs[2].len = savedataSize;
392
393 /* Map ROM */
394 descs[3].ptr = gba->memory.rom;
395 descs[3].start = BASE_CART0;
396 descs[3].len = romSize;
397 descs[3].flags = RETRO_MEMDESC_CONST;
398
399 descs[4].ptr = gba->memory.rom;
400 descs[4].start = BASE_CART1;
401 descs[4].len = romSize;
402 descs[4].flags = RETRO_MEMDESC_CONST;
403
404 descs[5].ptr = gba->memory.rom;
405 descs[5].start = BASE_CART2;
406 descs[5].len = romSize;
407 descs[5].flags = RETRO_MEMDESC_CONST;
408
409 /* Map BIOS */
410 descs[6].ptr = gba->memory.bios;
411 descs[6].start = BASE_BIOS;
412 descs[6].len = SIZE_BIOS;
413 descs[6].flags = RETRO_MEMDESC_CONST;
414
415 /* Map VRAM */
416 descs[7].ptr = gba->video.vram;
417 descs[7].start = BASE_VRAM;
418 descs[7].len = SIZE_VRAM;
419 descs[7].select = 0xFF000000;
420
421 /* Map palette RAM */
422 descs[8].ptr = gba->video.palette;
423 descs[8].start = BASE_PALETTE_RAM;
424 descs[8].len = SIZE_PALETTE_RAM;
425 descs[8].select = 0xFF000000;
426
427 /* Map OAM */
428 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
429 descs[9].start = BASE_OAM;
430 descs[9].len = SIZE_OAM;
431 descs[9].select = 0xFF000000;
432
433 /* Map mmapped I/O */
434 descs[10].ptr = gba->memory.io;
435 descs[10].start = BASE_IO;
436 descs[10].len = SIZE_IO;
437
438 mmaps.descriptors = descs;
439 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
440
441 bool yes = true;
442 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
443 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
444 }
445#endif
446#ifdef M_CORE_GB
447 if (core->platform(core) == PLATFORM_GB) {
448 struct GB* gb = core->board;
449 struct retro_memory_descriptor descs[11];
450 struct retro_memory_map mmaps;
451
452 memset(descs, 0, sizeof(descs));
453 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
454
455 unsigned i = 0;
456
457 /* Map ROM */
458 descs[i].ptr = gb->memory.rom;
459 descs[i].start = GB_BASE_CART_BANK0;
460 descs[i].len = GB_SIZE_CART_BANK0;
461 descs[i].flags = RETRO_MEMDESC_CONST;
462 i++;
463
464 descs[i].ptr = gb->memory.rom;
465 descs[i].offset = GB_SIZE_CART_BANK0;
466 descs[i].start = GB_BASE_CART_BANK1;
467 descs[i].len = GB_SIZE_CART_BANK0;
468 descs[i].flags = RETRO_MEMDESC_CONST;
469 i++;
470
471 /* Map VRAM */
472 descs[i].ptr = gb->video.vram;
473 descs[i].start = GB_BASE_VRAM;
474 descs[i].len = GB_SIZE_VRAM_BANK0;
475 i++;
476
477 /* Map working RAM */
478 descs[i].ptr = gb->memory.wram;
479 descs[i].start = GB_BASE_WORKING_RAM_BANK0;
480 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
481 i++;
482
483 descs[i].ptr = gb->memory.wram;
484 descs[i].offset = GB_SIZE_WORKING_RAM_BANK0;
485 descs[i].start = GB_BASE_WORKING_RAM_BANK1;
486 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
487 i++;
488
489 /* Map OAM */
490 descs[i].ptr = &gb->video.oam; /* video.oam is a structure */
491 descs[i].start = GB_BASE_OAM;
492 descs[i].len = GB_SIZE_OAM;
493 descs[i].select = 0xFFFFFF60;
494 i++;
495
496 /* Map mmapped I/O */
497 descs[i].ptr = gb->memory.io;
498 descs[i].start = GB_BASE_IO;
499 descs[i].len = GB_SIZE_IO;
500 i++;
501
502 /* Map High RAM */
503 descs[i].ptr = gb->memory.hram;
504 descs[i].start = GB_BASE_HRAM;
505 descs[i].len = GB_SIZE_HRAM;
506 descs[i].select = 0xFFFFFF80;
507 i++;
508
509 /* Map IE Register */
510 descs[i].ptr = &gb->memory.ie;
511 descs[i].start = GB_BASE_IE;
512 descs[i].len = 1;
513 i++;
514
515 /* Map External RAM */
516 if (gb->memory.sram) {
517 descs[i].ptr = gb->memory.sram;
518 descs[i].start = GB_BASE_EXTERNAL_RAM;
519 descs[i].len = savedataSize;
520 i++;
521 }
522
523 if (gb->model >= GB_MODEL_CGB) {
524 /* Map working RAM */
525 /* banks 2-7 of wram mapped in virtual address so it can be
526 * accessed without bank switching, GBC only */
527 descs[i].ptr = gb->memory.wram + 0x2000;
528 descs[i].start = 0x10000;
529 descs[i].len = GB_SIZE_WORKING_RAM - 0x2000;
530 descs[i].select = 0xFFFFA000;
531 i++;
532 }
533
534 mmaps.descriptors = descs;
535 mmaps.num_descriptors = i;
536
537 bool yes = true;
538 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
539 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
540 }
541#endif
542}
543
544void retro_reset(void) {
545 core->reset(core);
546 _setupMaps(core);
547
548 rumbleUp = 0;
549 rumbleDown = 0;
550}
551
552bool retro_load_game(const struct retro_game_info* game) {
553 struct VFile* rom;
554 if (game->data) {
555 data = anonymousMemoryMap(game->size);
556 dataSize = game->size;
557 memcpy(data, game->data, game->size);
558 rom = VFileFromMemory(data, game->size);
559 } else {
560 data = 0;
561 rom = VFileOpen(game->path, O_RDONLY);
562 }
563 if (!rom) {
564 return false;
565 }
566
567 core = mCoreFindVF(rom);
568 if (!core) {
569 rom->close(rom);
570 mappedMemoryFree(data, game->size);
571 return false;
572 }
573 mCoreInitConfig(core, NULL);
574 core->init(core);
575 core->setAVStream(core, &stream);
576
577 size_t size = 256 * 224 * BYTES_PER_PIXEL;
578 outputBuffer = malloc(size);
579 memset(outputBuffer, 0xFF, size);
580 core->setVideoBuffer(core, outputBuffer, 256);
581
582 core->setAudioBufferSize(core, SAMPLES);
583
584 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
585 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
586
587 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
588
589 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
590 memset(savedata, 0xFF, SIZE_CART_FLASH1M);
591 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
592
593 _reloadSettings();
594 core->loadROM(core, rom);
595 core->loadSave(core, save);
596
597 const char* sysDir = 0;
598 const char* biosName = 0;
599 char biosPath[PATH_MAX];
600 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
601
602#ifdef M_CORE_GBA
603 if (core->platform(core) == PLATFORM_GBA) {
604 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
605 biosName = "gba_bios.bin";
606
607 }
608#endif
609
610#ifdef M_CORE_GB
611 if (core->platform(core) == PLATFORM_GB) {
612 memset(&cam, 0, sizeof(cam));
613 cam.height = GBCAM_HEIGHT;
614 cam.width = GBCAM_WIDTH;
615 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
616 cam.frame_raw_framebuffer = _updateCamera;
617 if (environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam)) {
618 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
619 }
620
621 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
622 struct GB* gb = core->board;
623
624 if (modelName) {
625 gb->model = GBNameToModel(modelName);
626 } else {
627 GBDetectModel(gb);
628 }
629
630 switch (gb->model) {
631 case GB_MODEL_AGB:
632 case GB_MODEL_CGB:
633 biosName = "gbc_bios.bin";
634 break;
635 case GB_MODEL_SGB:
636 biosName = "sgb_bios.bin";
637 break;
638 case GB_MODEL_DMG:
639 default:
640 biosName = "gb_bios.bin";
641 break;
642 }
643 }
644#endif
645
646 if (core->opts.useBios && sysDir && biosName) {
647 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
648 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
649 if (bios) {
650 core->loadBIOS(core, bios, 0);
651 }
652 }
653
654 core->reset(core);
655 _setupMaps(core);
656
657 return true;
658}
659
660void retro_unload_game(void) {
661 if (!core) {
662 return;
663 }
664 mCoreConfigDeinit(&core->config);
665 core->deinit(core);
666 mappedMemoryFree(data, dataSize);
667 data = 0;
668 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
669 savedata = 0;
670}
671
672size_t retro_serialize_size(void) {
673 struct VFile* vfm = VFileMemChunk(NULL, 0);
674 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
675 size_t size = vfm->size(vfm);
676 vfm->close(vfm);
677 return size;
678}
679
680bool retro_serialize(void* data, size_t size) {
681 struct VFile* vfm = VFileMemChunk(NULL, 0);
682 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
683 if ((ssize_t) size > vfm->size(vfm)) {
684 size = vfm->size(vfm);
685 } else if ((ssize_t) size < vfm->size(vfm)) {
686 vfm->close(vfm);
687 return false;
688 }
689 vfm->seek(vfm, 0, SEEK_SET);
690 vfm->read(vfm, data, size);
691 vfm->close(vfm);
692 return true;
693}
694
695bool retro_unserialize(const void* data, size_t size) {
696 struct VFile* vfm = VFileFromConstMemory(data, size);
697 bool success = mCoreLoadStateNamed(core, vfm, SAVESTATE_RTC);
698 vfm->close(vfm);
699 return success;
700}
701
702void retro_cheat_reset(void) {
703 mCheatDeviceClear(core->cheatDevice(core));
704}
705
706void retro_cheat_set(unsigned index, bool enabled, const char* code) {
707 UNUSED(index);
708 UNUSED(enabled);
709 struct mCheatDevice* device = core->cheatDevice(core);
710 struct mCheatSet* cheatSet = NULL;
711 if (mCheatSetsSize(&device->cheats)) {
712 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
713 } else {
714 cheatSet = device->createSet(device, NULL);
715 mCheatAddSet(device, cheatSet);
716 }
717// Convert the super wonky unportable libretro format to something normal
718#ifdef M_CORE_GBA
719 if (core->platform(core) == PLATFORM_GBA) {
720 char realCode[] = "XXXXXXXX XXXXXXXX";
721 size_t len = strlen(code) + 1; // Include null terminator
722 size_t i, pos;
723 for (i = 0, pos = 0; i < len; ++i) {
724 if (isspace((int) code[i]) || code[i] == '+') {
725 realCode[pos] = ' ';
726 } else {
727 realCode[pos] = code[i];
728 }
729 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
730 realCode[pos] = '\0';
731 mCheatAddLine(cheatSet, realCode, 0);
732 pos = 0;
733 continue;
734 }
735 ++pos;
736 }
737 }
738#endif
739#ifdef M_CORE_GB
740 if (core->platform(core) == PLATFORM_GB) {
741 char realCode[] = "XXX-XXX-XXX";
742 size_t len = strlen(code) + 1; // Include null terminator
743 size_t i, pos;
744 for (i = 0, pos = 0; i < len; ++i) {
745 if (isspace((int) code[i]) || code[i] == '+') {
746 realCode[pos] = '\0';
747 } else {
748 realCode[pos] = code[i];
749 }
750 if (pos == 11 || !realCode[pos]) {
751 realCode[pos] = '\0';
752 mCheatAddLine(cheatSet, realCode, 0);
753 pos = 0;
754 continue;
755 }
756 ++pos;
757 }
758 }
759#endif
760 cheatSet->refresh(cheatSet, device);
761}
762
763unsigned retro_get_region(void) {
764 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
765}
766
767void retro_set_controller_port_device(unsigned port, unsigned device) {
768 UNUSED(port);
769 UNUSED(device);
770}
771
772bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
773 UNUSED(game_type);
774 UNUSED(info);
775 UNUSED(num_info);
776 return false;
777}
778
779void* retro_get_memory_data(unsigned id) {
780 if (id != RETRO_MEMORY_SAVE_RAM) {
781 return 0;
782 }
783 return savedata;
784}
785
786size_t retro_get_memory_size(unsigned id) {
787 if (id != RETRO_MEMORY_SAVE_RAM) {
788 return 0;
789 }
790#ifdef M_CORE_GBA
791 if (core->platform(core) == PLATFORM_GBA) {
792 switch (((struct GBA*) core->board)->memory.savedata.type) {
793 case SAVEDATA_AUTODETECT:
794 return SIZE_CART_FLASH1M;
795 default:
796 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
797 }
798 }
799#endif
800#ifdef M_CORE_GB
801 if (core->platform(core) == PLATFORM_GB) {
802 return ((struct GB*) core->board)->sramSize;
803 }
804#endif
805 return 0;
806}
807
808void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
809 UNUSED(logger);
810 if (!logCallback) {
811 return;
812 }
813
814 char message[128];
815 vsnprintf(message, sizeof(message), format, args);
816
817 enum retro_log_level retroLevel = RETRO_LOG_INFO;
818 switch (level) {
819 case mLOG_ERROR:
820 case mLOG_FATAL:
821 retroLevel = RETRO_LOG_ERROR;
822 break;
823 case mLOG_WARN:
824 retroLevel = RETRO_LOG_WARN;
825 break;
826 case mLOG_INFO:
827 retroLevel = RETRO_LOG_INFO;
828 break;
829 case mLOG_GAME_ERROR:
830 case mLOG_STUB:
831#ifdef NDEBUG
832 return;
833#else
834 retroLevel = RETRO_LOG_DEBUG;
835 break;
836#endif
837 case mLOG_DEBUG:
838 retroLevel = RETRO_LOG_DEBUG;
839 break;
840 }
841#ifdef NDEBUG
842 static int biosCat = -1;
843 if (biosCat < 0) {
844 biosCat = mLogCategoryById("gba.bios");
845 }
846
847 if (category == biosCat) {
848 return;
849 }
850#endif
851 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
852}
853
854static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
855 UNUSED(stream);
856 int16_t samples[SAMPLES * 2];
857 blip_read_samples(left, samples, SAMPLES, true);
858 blip_read_samples(right, samples + 1, SAMPLES, true);
859 audioCallback(samples, SAMPLES);
860}
861
862static void _setRumble(struct mRumble* rumble, int enable) {
863 UNUSED(rumble);
864 if (!rumbleCallback) {
865 return;
866 }
867 if (enable) {
868 ++rumbleUp;
869 } else {
870 ++rumbleDown;
871 }
872}
873
874static void _updateLux(struct GBALuminanceSource* lux) {
875 UNUSED(lux);
876 struct retro_variable var = {
877 .key = "mgba_solar_sensor_level",
878 .value = 0
879 };
880
881 bool updated = false;
882 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
883 return;
884 }
885 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
886 return;
887 }
888
889 char* end;
890 int newLuxLevel = strtol(var.value, &end, 10);
891 if (!*end) {
892 if (newLuxLevel > 10) {
893 luxLevel = 10;
894 } else if (newLuxLevel < 0) {
895 luxLevel = 0;
896 } else {
897 luxLevel = newLuxLevel;
898 }
899 }
900}
901
902static uint8_t _readLux(struct GBALuminanceSource* lux) {
903 UNUSED(lux);
904 int value = 0x16;
905 if (luxLevel > 0) {
906 value += GBA_LUX_LEVELS[luxLevel - 1];
907 }
908 return 0xFF - value;
909}
910
911static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
912 if (!camData || width > camWidth || height > camHeight) {
913 if (camData) {
914 free(camData);
915 camData = NULL;
916 }
917 unsigned bufPitch = pitch / sizeof(*buffer);
918 unsigned bufHeight = height;
919 if (imcapWidth > bufPitch) {
920 bufPitch = imcapWidth;
921 }
922 if (imcapHeight > bufHeight) {
923 bufHeight = imcapHeight;
924 }
925 camData = malloc(sizeof(*buffer) * bufHeight * bufPitch);
926 memset(camData, 0xFF, sizeof(*buffer) * bufHeight * bufPitch);
927 camWidth = width;
928 camHeight = bufHeight;
929 camStride = bufPitch;
930 }
931 size_t i;
932 for (i = 0; i < height; ++i) {
933 memcpy(&camData[camStride * i], &buffer[pitch * i / sizeof(*buffer)], pitch);
934 }
935}
936
937static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
938 UNUSED(image);
939 UNUSED(colorFormats);
940
941 if (camData) {
942 free(camData);
943 }
944 camData = NULL;
945 imcapWidth = w;
946 imcapHeight = h;
947 cam.start();
948}
949
950static void _stopImage(struct mImageSource* image) {
951 UNUSED(image);
952 cam.stop();
953}
954
955static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
956 UNUSED(image);
957 if (!camData) {
958 cam.start();
959 *buffer = NULL;
960 return;
961 }
962 size_t offset = 0;
963 if (imcapWidth < camWidth) {
964 offset += (camWidth - imcapWidth) / 2;
965 }
966 if (imcapHeight < camHeight) {
967 offset += (camHeight - imcapHeight) / 2 * camStride;
968 }
969
970 *buffer = &camData[offset];
971 *stride = camStride;
972 *colorFormat = mCOLOR_XRGB8;
973}