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#define EVENT_RATE 60
34
35static retro_environment_t environCallback;
36static retro_video_refresh_t videoCallback;
37static retro_audio_sample_batch_t audioCallback;
38static retro_input_poll_t inputPollCallback;
39static retro_input_state_t inputCallback;
40static retro_log_printf_t logCallback;
41static retro_set_rumble_state_t rumbleCallback;
42static retro_sensor_get_input_t sensorGetCallback;
43static retro_set_sensor_state_t sensorStateCallback;
44
45static void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args);
46
47static void _postAudioBuffer(struct mAVStream*, blip_t* left, blip_t* right);
48static void _setRumble(struct mRumble* rumble, int enable);
49static uint8_t _readLux(struct GBALuminanceSource* lux);
50static void _updateLux(struct GBALuminanceSource* lux);
51static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch);
52static void _startImage(struct mImageSource*, unsigned w, unsigned h, int colorFormats);
53static void _stopImage(struct mImageSource*);
54static void _requestImage(struct mImageSource*, const void** buffer, size_t* stride, enum mColorFormat* colorFormat);
55static void _updateRotation(struct mRotationSource* source);
56static int32_t _readTiltX(struct mRotationSource* source);
57static int32_t _readTiltY(struct mRotationSource* source);
58static int32_t _readGyroZ(struct mRotationSource* source);
59
60static struct mCore* core;
61static color_t* outputBuffer = NULL;
62static void* data;
63static size_t dataSize;
64static void* savedata;
65static struct mAVStream stream;
66static bool sensorsInitDone;
67static int rumbleUp;
68static int rumbleDown;
69static struct mRumble rumble;
70static struct GBALuminanceSource lux;
71static struct mRotationSource rotation;
72static bool tiltEnabled;
73static bool gyroEnabled;
74static int luxLevelIndex;
75static uint8_t luxLevel;
76static bool luxSensorEnabled;
77static bool luxSensorUsed;
78static struct mLogger logger;
79static struct retro_camera_callback cam;
80static struct mImageSource imageSource;
81static uint32_t* camData = NULL;
82static unsigned camWidth;
83static unsigned camHeight;
84static unsigned imcapWidth;
85static unsigned imcapHeight;
86static size_t camStride;
87static bool deferredSetup = false;
88static bool envVarsUpdated;
89static int32_t tiltX = 0;
90static int32_t tiltY = 0;
91static int32_t gyroZ = 0;
92
93static void _initSensors(void) {
94 if (sensorsInitDone) {
95 return;
96 }
97
98 struct retro_sensor_interface sensorInterface;
99 if (environCallback(RETRO_ENVIRONMENT_GET_SENSOR_INTERFACE, &sensorInterface)) {
100 sensorGetCallback = sensorInterface.get_sensor_input;
101 sensorStateCallback = sensorInterface.set_sensor_state;
102
103 if (sensorStateCallback && sensorGetCallback) {
104 if (sensorStateCallback(0, RETRO_SENSOR_ACCELEROMETER_ENABLE, EVENT_RATE)) {
105 tiltEnabled = true;
106 }
107
108 if (sensorStateCallback(0, RETRO_SENSOR_GYROSCOPE_ENABLE, EVENT_RATE)) {
109 gyroEnabled = true;
110 }
111
112 if (sensorStateCallback(0, RETRO_SENSOR_ILLUMINANCE_ENABLE, EVENT_RATE)) {
113 luxSensorEnabled = true;
114 }
115 }
116 }
117
118 sensorsInitDone = true;
119}
120
121static void _reloadSettings(void) {
122 struct mCoreOptions opts = {
123 .useBios = true,
124 .volume = 0x100,
125 };
126
127 struct retro_variable var;
128#ifdef M_CORE_GB
129 enum GBModel model;
130 const char* modelName;
131
132 var.key = "mgba_gb_model";
133 var.value = 0;
134 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
135 if (strcmp(var.value, "Game Boy") == 0) {
136 model = GB_MODEL_DMG;
137 } else if (strcmp(var.value, "Super Game Boy") == 0) {
138 model = GB_MODEL_SGB;
139 } else if (strcmp(var.value, "Game Boy Color") == 0) {
140 model = GB_MODEL_CGB;
141 } else if (strcmp(var.value, "Game Boy Advance") == 0) {
142 model = GB_MODEL_AGB;
143 } else {
144 model = GB_MODEL_AUTODETECT;
145 }
146
147 modelName = GBModelToName(model);
148 mCoreConfigSetDefaultValue(&core->config, "gb.model", modelName);
149 mCoreConfigSetDefaultValue(&core->config, "sgb.model", modelName);
150 mCoreConfigSetDefaultValue(&core->config, "cgb.model", modelName);
151 }
152#endif
153
154 var.key = "mgba_use_bios";
155 var.value = 0;
156 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
157 opts.useBios = strcmp(var.value, "ON") == 0;
158 }
159
160 var.key = "mgba_skip_bios";
161 var.value = 0;
162 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
163 opts.skipBios = strcmp(var.value, "ON") == 0;
164 }
165
166#ifdef M_CORE_GB
167 var.key = "mgba_sgb_borders";
168 var.value = 0;
169 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
170 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", strcmp(var.value, "ON") == 0);
171 }
172#endif
173
174 var.key = "mgba_frameskip";
175 var.value = 0;
176 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
177 opts.frameskip = strtol(var.value, NULL, 10);
178 }
179
180 var.key = "mgba_idle_optimization";
181 var.value = 0;
182 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
183 if (strcmp(var.value, "Don't Remove") == 0) {
184 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
185 } else if (strcmp(var.value, "Remove Known") == 0) {
186 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
187 } else if (strcmp(var.value, "Detect and Remove") == 0) {
188 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
189 }
190 }
191
192#ifdef M_CORE_GBA
193 var.key = "mgba_force_gbp";
194 var.value = 0;
195 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
196 mCoreConfigSetDefaultIntValue(&core->config, "gba.forceGbp", strcmp(var.value, "ON") == 0);
197 }
198#endif
199
200 mCoreConfigLoadDefaults(&core->config, &opts);
201 mCoreLoadConfig(core);
202}
203
204static void _doDeferredSetup(void) {
205 // Libretro API doesn't let you know when it's done copying data into the save buffers.
206 // On the off-hand chance that a core actually expects its buffers to be populated when
207 // you actually first get them, you're out of luck without workarounds. Yup, seriously.
208 // Here's that workaround, but really the API needs to be thrown out and rewritten.
209 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
210 if (!core->loadSave(core, save)) {
211 save->close(save);
212 }
213 deferredSetup = false;
214}
215
216unsigned retro_api_version(void) {
217 return RETRO_API_VERSION;
218}
219
220void retro_set_environment(retro_environment_t env) {
221 environCallback = env;
222
223 libretro_set_core_options(environCallback);
224}
225
226void retro_set_video_refresh(retro_video_refresh_t video) {
227 videoCallback = video;
228}
229
230void retro_set_audio_sample(retro_audio_sample_t audio) {
231 UNUSED(audio);
232}
233
234void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
235 audioCallback = audioBatch;
236}
237
238void retro_set_input_poll(retro_input_poll_t inputPoll) {
239 inputPollCallback = inputPoll;
240}
241
242void retro_set_input_state(retro_input_state_t input) {
243 inputCallback = input;
244}
245
246void retro_get_system_info(struct retro_system_info* info) {
247 info->need_fullpath = false;
248#ifdef M_CORE_GB
249 info->valid_extensions = "gba|gb|gbc|sgb";
250#else
251 info->valid_extensions = "gba";
252#endif
253 info->library_version = projectVersion;
254 info->library_name = projectName;
255 info->block_extract = false;
256}
257
258void retro_get_system_av_info(struct retro_system_av_info* info) {
259 unsigned width, height;
260 core->desiredVideoDimensions(core, &width, &height);
261 info->geometry.base_width = width;
262 info->geometry.base_height = height;
263#ifdef M_CORE_GB
264 if (core->platform(core) == mPLATFORM_GB) {
265 info->geometry.max_width = 256;
266 info->geometry.max_height = 224;
267 } else
268#endif
269 {
270 info->geometry.max_width = width;
271 info->geometry.max_height = height;
272 }
273
274 info->geometry.aspect_ratio = width / (double) height;
275 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
276 info->timing.sample_rate = 32768;
277}
278
279void retro_init(void) {
280 enum retro_pixel_format fmt;
281#ifdef COLOR_16_BIT
282#ifdef COLOR_5_6_5
283 fmt = RETRO_PIXEL_FORMAT_RGB565;
284#else
285#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
286 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
287#endif
288#else
289#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
290 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
291#endif
292 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
293
294 struct retro_input_descriptor inputDescriptors[] = {
295 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
296 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
297 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
298 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
299 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
300 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
301 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
302 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
303 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
304 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
305 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
306 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
307 { 0 }
308 };
309 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
310
311 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
312
313 struct retro_rumble_interface rumbleInterface;
314 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
315 rumbleCallback = rumbleInterface.set_rumble_state;
316 rumble.setRumble = _setRumble;
317 } else {
318 rumbleCallback = 0;
319 }
320
321 sensorsInitDone = false;
322 sensorGetCallback = 0;
323 sensorStateCallback = 0;
324
325 tiltEnabled = false;
326 gyroEnabled = false;
327 rotation.sample = _updateRotation;
328 rotation.readTiltX = _readTiltX;
329 rotation.readTiltY = _readTiltY;
330 rotation.readGyroZ = _readGyroZ;
331
332 envVarsUpdated = true;
333 luxSensorUsed = false;
334 luxSensorEnabled = false;
335 luxLevelIndex = 0;
336 luxLevel = 0;
337 lux.readLuminance = _readLux;
338 lux.sample = _updateLux;
339 _updateLux(&lux);
340
341 struct retro_log_callback log;
342 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
343 logCallback = log.log;
344 } else {
345 logCallback = 0;
346 }
347 logger.log = GBARetroLog;
348 mLogSetDefaultLogger(&logger);
349
350 stream.videoDimensionsChanged = 0;
351 stream.postAudioFrame = 0;
352 stream.postAudioBuffer = _postAudioBuffer;
353 stream.postVideoFrame = 0;
354
355 imageSource.startRequestImage = _startImage;
356 imageSource.stopRequestImage = _stopImage;
357 imageSource.requestImage = _requestImage;
358}
359
360void retro_deinit(void) {
361 free(outputBuffer);
362
363 if (sensorStateCallback) {
364 sensorStateCallback(0, RETRO_SENSOR_ACCELEROMETER_DISABLE, EVENT_RATE);
365 sensorStateCallback(0, RETRO_SENSOR_GYROSCOPE_DISABLE, EVENT_RATE);
366 sensorStateCallback(0, RETRO_SENSOR_ILLUMINANCE_DISABLE, EVENT_RATE);
367 sensorGetCallback = NULL;
368 sensorStateCallback = NULL;
369 }
370
371 tiltEnabled = false;
372 gyroEnabled = false;
373 luxSensorEnabled = false;
374 sensorsInitDone = false;
375}
376
377void retro_run(void) {
378 if (deferredSetup) {
379 _doDeferredSetup();
380 }
381 uint16_t keys;
382
383 inputPollCallback();
384
385 bool updated = false;
386 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
387 envVarsUpdated = true;
388
389 struct retro_variable var = {
390 .key = "mgba_allow_opposing_directions",
391 .value = 0
392 };
393 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
394 mCoreConfigSetIntValue(&core->config, "allowOpposingDirections", strcmp(var.value, "yes") == 0);
395 core->reloadConfigOption(core, "allowOpposingDirections", NULL);
396 }
397
398 var.key = "mgba_frameskip";
399 var.value = 0;
400 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
401 mCoreConfigSetIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
402 core->reloadConfigOption(core, "frameskip", NULL);
403 }
404 }
405
406 keys = 0;
407 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
408 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
409 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
410 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
411 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
412 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
413 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
414 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
415 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
416 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
417 core->setKeys(core, keys);
418
419 if (!luxSensorUsed) {
420 static bool wasAdjustingLux = false;
421 if (wasAdjustingLux) {
422 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
423 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
424 } else {
425 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
426 ++luxLevelIndex;
427 if (luxLevelIndex > 10) {
428 luxLevelIndex = 10;
429 }
430 wasAdjustingLux = true;
431 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
432 --luxLevelIndex;
433 if (luxLevelIndex < 0) {
434 luxLevelIndex = 0;
435 }
436 wasAdjustingLux = true;
437 }
438 }
439 }
440
441 core->runFrame(core);
442 unsigned width, height;
443 core->desiredVideoDimensions(core, &width, &height);
444 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
445
446 if (rumbleCallback) {
447 if (rumbleUp) {
448 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
449 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
450 } else {
451 rumbleCallback(0, RETRO_RUMBLE_STRONG, 0);
452 rumbleCallback(0, RETRO_RUMBLE_WEAK, 0);
453 }
454 rumbleUp = 0;
455 rumbleDown = 0;
456 }
457}
458
459static void _setupMaps(struct mCore* core) {
460#ifdef M_CORE_GBA
461 if (core->platform(core) == mPLATFORM_GBA) {
462 struct GBA* gba = core->board;
463 struct retro_memory_descriptor descs[11];
464 struct retro_memory_map mmaps;
465 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
466
467 memset(descs, 0, sizeof(descs));
468 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
469
470 /* Map internal working RAM */
471 descs[0].ptr = gba->memory.iwram;
472 descs[0].start = BASE_WORKING_IRAM;
473 descs[0].len = SIZE_WORKING_IRAM;
474 descs[0].select = 0xFF000000;
475
476 /* Map working RAM */
477 descs[1].ptr = gba->memory.wram;
478 descs[1].start = BASE_WORKING_RAM;
479 descs[1].len = SIZE_WORKING_RAM;
480 descs[1].select = 0xFF000000;
481
482 /* Map save RAM */
483 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
484 descs[2].ptr = savedataSize ? savedata : NULL;
485 descs[2].start = BASE_CART_SRAM;
486 descs[2].len = savedataSize;
487
488 /* Map ROM */
489 descs[3].ptr = gba->memory.rom;
490 descs[3].start = BASE_CART0;
491 descs[3].len = romSize;
492 descs[3].flags = RETRO_MEMDESC_CONST;
493
494 descs[4].ptr = gba->memory.rom;
495 descs[4].start = BASE_CART1;
496 descs[4].len = romSize;
497 descs[4].flags = RETRO_MEMDESC_CONST;
498
499 descs[5].ptr = gba->memory.rom;
500 descs[5].start = BASE_CART2;
501 descs[5].len = romSize;
502 descs[5].flags = RETRO_MEMDESC_CONST;
503
504 /* Map BIOS */
505 descs[6].ptr = gba->memory.bios;
506 descs[6].start = BASE_BIOS;
507 descs[6].len = SIZE_BIOS;
508 descs[6].flags = RETRO_MEMDESC_CONST;
509
510 /* Map VRAM */
511 descs[7].ptr = gba->video.vram;
512 descs[7].start = BASE_VRAM;
513 descs[7].len = SIZE_VRAM;
514 descs[7].select = 0xFF000000;
515
516 /* Map palette RAM */
517 descs[8].ptr = gba->video.palette;
518 descs[8].start = BASE_PALETTE_RAM;
519 descs[8].len = SIZE_PALETTE_RAM;
520 descs[8].select = 0xFF000000;
521
522 /* Map OAM */
523 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
524 descs[9].start = BASE_OAM;
525 descs[9].len = SIZE_OAM;
526 descs[9].select = 0xFF000000;
527
528 /* Map mmapped I/O */
529 descs[10].ptr = gba->memory.io;
530 descs[10].start = BASE_IO;
531 descs[10].len = SIZE_IO;
532
533 mmaps.descriptors = descs;
534 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
535
536 bool yes = true;
537 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
538 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
539 }
540#endif
541#ifdef M_CORE_GB
542 if (core->platform(core) == mPLATFORM_GB) {
543 struct GB* gb = core->board;
544 struct retro_memory_descriptor descs[11];
545 struct retro_memory_map mmaps;
546
547 memset(descs, 0, sizeof(descs));
548 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
549
550 unsigned i = 0;
551
552 /* Map ROM */
553 descs[i].ptr = gb->memory.rom;
554 descs[i].start = GB_BASE_CART_BANK0;
555 descs[i].len = GB_SIZE_CART_BANK0;
556 descs[i].flags = RETRO_MEMDESC_CONST;
557 i++;
558
559 descs[i].ptr = gb->memory.rom;
560 descs[i].offset = GB_SIZE_CART_BANK0;
561 descs[i].start = GB_BASE_CART_BANK1;
562 descs[i].len = GB_SIZE_CART_BANK0;
563 descs[i].flags = RETRO_MEMDESC_CONST;
564 i++;
565
566 /* Map VRAM */
567 descs[i].ptr = gb->video.vram;
568 descs[i].start = GB_BASE_VRAM;
569 descs[i].len = GB_SIZE_VRAM_BANK0;
570 i++;
571
572 /* Map working RAM */
573 descs[i].ptr = gb->memory.wram;
574 descs[i].start = GB_BASE_WORKING_RAM_BANK0;
575 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
576 i++;
577
578 descs[i].ptr = gb->memory.wram;
579 descs[i].offset = GB_SIZE_WORKING_RAM_BANK0;
580 descs[i].start = GB_BASE_WORKING_RAM_BANK1;
581 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
582 i++;
583
584 /* Map OAM */
585 descs[i].ptr = &gb->video.oam; /* video.oam is a structure */
586 descs[i].start = GB_BASE_OAM;
587 descs[i].len = GB_SIZE_OAM;
588 descs[i].select = 0xFFFFFF60;
589 i++;
590
591 /* Map mmapped I/O */
592 descs[i].ptr = gb->memory.io;
593 descs[i].start = GB_BASE_IO;
594 descs[i].len = GB_SIZE_IO;
595 i++;
596
597 /* Map High RAM */
598 descs[i].ptr = gb->memory.hram;
599 descs[i].start = GB_BASE_HRAM;
600 descs[i].len = GB_SIZE_HRAM;
601 descs[i].select = 0xFFFFFF80;
602 i++;
603
604 /* Map IE Register */
605 descs[i].ptr = &gb->memory.ie;
606 descs[i].start = GB_BASE_IE;
607 descs[i].len = 1;
608 i++;
609
610 /* Map External RAM */
611 if (gb->memory.sram) {
612 descs[i].ptr = gb->memory.sram;
613 descs[i].start = GB_BASE_EXTERNAL_RAM;
614 descs[i].len = savedataSize;
615 i++;
616 }
617
618 if (gb->model >= GB_MODEL_CGB) {
619 /* Map working RAM */
620 /* banks 2-7 of wram mapped in virtual address so it can be
621 * accessed without bank switching, GBC only */
622 descs[i].ptr = gb->memory.wram + 0x2000;
623 descs[i].start = 0x10000;
624 descs[i].len = GB_SIZE_WORKING_RAM - 0x2000;
625 descs[i].select = 0xFFFFA000;
626 i++;
627 }
628
629 mmaps.descriptors = descs;
630 mmaps.num_descriptors = i;
631
632 bool yes = true;
633 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
634 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
635 }
636#endif
637}
638
639void retro_reset(void) {
640 core->reset(core);
641 _setupMaps(core);
642
643 rumbleUp = 0;
644 rumbleDown = 0;
645}
646
647bool retro_load_game(const struct retro_game_info* game) {
648 struct VFile* rom;
649 if (game->data) {
650 data = anonymousMemoryMap(game->size);
651 dataSize = game->size;
652 memcpy(data, game->data, game->size);
653 rom = VFileFromMemory(data, game->size);
654 } else {
655 data = 0;
656 rom = VFileOpen(game->path, O_RDONLY);
657 }
658 if (!rom) {
659 return false;
660 }
661
662 core = mCoreFindVF(rom);
663 if (!core) {
664 rom->close(rom);
665 mappedMemoryFree(data, game->size);
666 return false;
667 }
668 mCoreInitConfig(core, NULL);
669 core->init(core);
670 core->setAVStream(core, &stream);
671
672 size_t size = 256 * 224 * BYTES_PER_PIXEL;
673 outputBuffer = malloc(size);
674 memset(outputBuffer, 0xFF, size);
675 core->setVideoBuffer(core, outputBuffer, 256);
676
677 core->setAudioBufferSize(core, SAMPLES);
678
679 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
680 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
681
682 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
683
684 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
685 memset(savedata, 0xFF, SIZE_CART_FLASH1M);
686
687 _reloadSettings();
688 core->loadROM(core, rom);
689 deferredSetup = true;
690
691 const char* sysDir = 0;
692 const char* biosName = 0;
693 char biosPath[PATH_MAX];
694 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
695
696#ifdef M_CORE_GBA
697 if (core->platform(core) == mPLATFORM_GBA) {
698 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
699 biosName = "gba_bios.bin";
700
701 }
702#endif
703
704#ifdef M_CORE_GB
705 if (core->platform(core) == mPLATFORM_GB) {
706 memset(&cam, 0, sizeof(cam));
707 cam.height = GBCAM_HEIGHT;
708 cam.width = GBCAM_WIDTH;
709 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
710 cam.frame_raw_framebuffer = _updateCamera;
711 if (environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam)) {
712 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
713 }
714
715 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
716 struct GB* gb = core->board;
717
718 if (modelName) {
719 gb->model = GBNameToModel(modelName);
720 } else {
721 GBDetectModel(gb);
722 }
723
724 switch (gb->model) {
725 case GB_MODEL_AGB:
726 case GB_MODEL_CGB:
727 biosName = "gbc_bios.bin";
728 break;
729 case GB_MODEL_SGB:
730 biosName = "sgb_bios.bin";
731 break;
732 case GB_MODEL_DMG:
733 default:
734 biosName = "gb_bios.bin";
735 break;
736 }
737 }
738#endif
739
740 if (core->opts.useBios && sysDir && biosName) {
741 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
742 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
743 if (bios) {
744 core->loadBIOS(core, bios, 0);
745 }
746 }
747
748 core->reset(core);
749 _setupMaps(core);
750
751 return true;
752}
753
754void retro_unload_game(void) {
755 if (!core) {
756 return;
757 }
758 mCoreConfigDeinit(&core->config);
759 core->deinit(core);
760 mappedMemoryFree(data, dataSize);
761 data = 0;
762 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
763 savedata = 0;
764}
765
766size_t retro_serialize_size(void) {
767 if (deferredSetup) {
768 _doDeferredSetup();
769 }
770 struct VFile* vfm = VFileMemChunk(NULL, 0);
771 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
772 size_t size = vfm->size(vfm);
773 vfm->close(vfm);
774 return size;
775}
776
777bool retro_serialize(void* data, size_t size) {
778 if (deferredSetup) {
779 _doDeferredSetup();
780 }
781 struct VFile* vfm = VFileMemChunk(NULL, 0);
782 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
783 if ((ssize_t) size > vfm->size(vfm)) {
784 size = vfm->size(vfm);
785 } else if ((ssize_t) size < vfm->size(vfm)) {
786 vfm->close(vfm);
787 return false;
788 }
789 vfm->seek(vfm, 0, SEEK_SET);
790 vfm->read(vfm, data, size);
791 vfm->close(vfm);
792 return true;
793}
794
795bool retro_unserialize(const void* data, size_t size) {
796 if (deferredSetup) {
797 _doDeferredSetup();
798 }
799 struct VFile* vfm = VFileFromConstMemory(data, size);
800 bool success = mCoreLoadStateNamed(core, vfm, SAVESTATE_RTC);
801 vfm->close(vfm);
802 return success;
803}
804
805void retro_cheat_reset(void) {
806 mCheatDeviceClear(core->cheatDevice(core));
807}
808
809void retro_cheat_set(unsigned index, bool enabled, const char* code) {
810 UNUSED(index);
811 UNUSED(enabled);
812 struct mCheatDevice* device = core->cheatDevice(core);
813 struct mCheatSet* cheatSet = NULL;
814 if (mCheatSetsSize(&device->cheats)) {
815 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
816 } else {
817 cheatSet = device->createSet(device, NULL);
818 mCheatAddSet(device, cheatSet);
819 }
820// Convert the super wonky unportable libretro format to something normal
821#ifdef M_CORE_GBA
822 if (core->platform(core) == mPLATFORM_GBA) {
823 char realCode[] = "XXXXXXXX XXXXXXXX";
824 size_t len = strlen(code) + 1; // Include null terminator
825 size_t i, pos;
826 for (i = 0, pos = 0; i < len; ++i) {
827 if (isspace((int) code[i]) || code[i] == '+') {
828 realCode[pos] = ' ';
829 } else {
830 realCode[pos] = code[i];
831 }
832 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
833 realCode[pos] = '\0';
834 mCheatAddLine(cheatSet, realCode, 0);
835 pos = 0;
836 continue;
837 }
838 ++pos;
839 }
840 }
841#endif
842#ifdef M_CORE_GB
843 if (core->platform(core) == mPLATFORM_GB) {
844 char realCode[] = "XXX-XXX-XXX";
845 size_t len = strlen(code) + 1; // Include null terminator
846 size_t i, pos;
847 for (i = 0, pos = 0; i < len; ++i) {
848 if (isspace((int) code[i]) || code[i] == '+') {
849 realCode[pos] = '\0';
850 } else {
851 realCode[pos] = code[i];
852 }
853 if (pos == 11 || !realCode[pos]) {
854 realCode[pos] = '\0';
855 mCheatAddLine(cheatSet, realCode, 0);
856 pos = 0;
857 continue;
858 }
859 ++pos;
860 }
861 }
862#endif
863 cheatSet->refresh(cheatSet, device);
864}
865
866unsigned retro_get_region(void) {
867 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
868}
869
870void retro_set_controller_port_device(unsigned port, unsigned device) {
871 UNUSED(port);
872 UNUSED(device);
873}
874
875bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
876 UNUSED(game_type);
877 UNUSED(info);
878 UNUSED(num_info);
879 return false;
880}
881
882void* retro_get_memory_data(unsigned id) {
883 switch (id) {
884 case RETRO_MEMORY_SAVE_RAM:
885 return savedata;
886 case RETRO_MEMORY_RTC:
887 switch (core->platform(core)) {
888#ifdef M_CORE_GB
889 case mPLATFORM_GB:
890 switch (((struct GB*) core->board)->memory.mbcType) {
891 case GB_MBC3_RTC:
892 return &((uint8_t*) savedata)[((struct GB*) core->board)->sramSize];
893 default:
894 return NULL;
895 }
896#endif
897 default:
898 return NULL;
899 }
900 default:
901 break;
902 }
903 return NULL;
904}
905
906size_t retro_get_memory_size(unsigned id) {
907 switch (id) {
908 case RETRO_MEMORY_SAVE_RAM:
909 switch (core->platform(core)) {
910#ifdef M_CORE_GBA
911 case mPLATFORM_GBA:
912 switch (((struct GBA*) core->board)->memory.savedata.type) {
913 case SAVEDATA_AUTODETECT:
914 return SIZE_CART_FLASH1M;
915 default:
916 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
917 }
918#endif
919#ifdef M_CORE_GB
920 case mPLATFORM_GB:
921 return ((struct GB*) core->board)->sramSize;
922#endif
923 default:
924 break;
925 }
926 break;
927 case RETRO_MEMORY_RTC:
928 switch (core->platform(core)) {
929#ifdef M_CORE_GB
930 case mPLATFORM_GB:
931 switch (((struct GB*) core->board)->memory.mbcType) {
932 case GB_MBC3_RTC:
933 return sizeof(struct GBMBCRTCSaveBuffer);
934 default:
935 return 0;
936 }
937#endif
938 default:
939 break;
940 }
941 break;
942 default:
943 break;
944 }
945 return 0;
946}
947
948void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
949 UNUSED(logger);
950 if (!logCallback) {
951 return;
952 }
953
954 char message[128];
955 vsnprintf(message, sizeof(message), format, args);
956
957 enum retro_log_level retroLevel = RETRO_LOG_INFO;
958 switch (level) {
959 case mLOG_ERROR:
960 case mLOG_FATAL:
961 retroLevel = RETRO_LOG_ERROR;
962 break;
963 case mLOG_WARN:
964 retroLevel = RETRO_LOG_WARN;
965 break;
966 case mLOG_INFO:
967 retroLevel = RETRO_LOG_INFO;
968 break;
969 case mLOG_GAME_ERROR:
970 case mLOG_STUB:
971#ifdef NDEBUG
972 return;
973#else
974 retroLevel = RETRO_LOG_DEBUG;
975 break;
976#endif
977 case mLOG_DEBUG:
978 retroLevel = RETRO_LOG_DEBUG;
979 break;
980 }
981#ifdef NDEBUG
982 static int biosCat = -1;
983 if (biosCat < 0) {
984 biosCat = mLogCategoryById("gba.bios");
985 }
986
987 if (category == biosCat) {
988 return;
989 }
990#endif
991 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
992}
993
994static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
995 UNUSED(stream);
996 int16_t samples[SAMPLES * 2];
997 blip_read_samples(left, samples, SAMPLES, true);
998 blip_read_samples(right, samples + 1, SAMPLES, true);
999 audioCallback(samples, SAMPLES);
1000}
1001
1002static void _setRumble(struct mRumble* rumble, int enable) {
1003 UNUSED(rumble);
1004 if (!rumbleCallback) {
1005 return;
1006 }
1007 if (enable) {
1008 ++rumbleUp;
1009 } else {
1010 ++rumbleDown;
1011 }
1012}
1013
1014static void _updateLux(struct GBALuminanceSource* lux) {
1015 UNUSED(lux);
1016 struct retro_variable var = {
1017 .key = "mgba_solar_sensor_level",
1018 .value = 0
1019 };
1020 bool luxVarUpdated = envVarsUpdated;
1021
1022 if (luxVarUpdated && (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value)) {
1023 luxVarUpdated = false;
1024 }
1025
1026 if (luxVarUpdated) {
1027 luxSensorUsed = strcmp(var.value, "sensor") == 0;
1028 }
1029
1030 if (luxSensorUsed) {
1031 _initSensors();
1032 float fLux = luxSensorEnabled ? sensorGetCallback(0, RETRO_SENSOR_ILLUMINANCE) : 0.0f;
1033 luxLevel = cbrtf(fLux) * 8;
1034 } else {
1035 if (luxVarUpdated) {
1036 char* end;
1037 int newLuxLevelIndex = strtol(var.value, &end, 10);
1038
1039 if (!*end) {
1040 if (newLuxLevelIndex > 10) {
1041 luxLevelIndex = 10;
1042 } else if (newLuxLevelIndex < 0) {
1043 luxLevelIndex = 0;
1044 } else {
1045 luxLevelIndex = newLuxLevelIndex;
1046 }
1047 }
1048 }
1049
1050 luxLevel = 0x16;
1051 if (luxLevelIndex > 0) {
1052 luxLevel += GBA_LUX_LEVELS[luxLevelIndex - 1];
1053 }
1054 }
1055
1056 envVarsUpdated = false;
1057}
1058
1059static uint8_t _readLux(struct GBALuminanceSource* lux) {
1060 UNUSED(lux);
1061 return 0xFF - luxLevel;
1062}
1063
1064static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
1065 if (!camData || width > camWidth || height > camHeight) {
1066 if (camData) {
1067 free(camData);
1068 camData = NULL;
1069 }
1070 unsigned bufPitch = pitch / sizeof(*buffer);
1071 unsigned bufHeight = height;
1072 if (imcapWidth > bufPitch) {
1073 bufPitch = imcapWidth;
1074 }
1075 if (imcapHeight > bufHeight) {
1076 bufHeight = imcapHeight;
1077 }
1078 camData = malloc(sizeof(*buffer) * bufHeight * bufPitch);
1079 memset(camData, 0xFF, sizeof(*buffer) * bufHeight * bufPitch);
1080 camWidth = width;
1081 camHeight = bufHeight;
1082 camStride = bufPitch;
1083 }
1084 size_t i;
1085 for (i = 0; i < height; ++i) {
1086 memcpy(&camData[camStride * i], &buffer[pitch * i / sizeof(*buffer)], pitch);
1087 }
1088}
1089
1090static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
1091 UNUSED(image);
1092 UNUSED(colorFormats);
1093
1094 if (camData) {
1095 free(camData);
1096 }
1097 camData = NULL;
1098 imcapWidth = w;
1099 imcapHeight = h;
1100 cam.start();
1101}
1102
1103static void _stopImage(struct mImageSource* image) {
1104 UNUSED(image);
1105 cam.stop();
1106}
1107
1108static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
1109 UNUSED(image);
1110 if (!camData) {
1111 cam.start();
1112 *buffer = NULL;
1113 return;
1114 }
1115 size_t offset = 0;
1116 if (imcapWidth < camWidth) {
1117 offset += (camWidth - imcapWidth) / 2;
1118 }
1119 if (imcapHeight < camHeight) {
1120 offset += (camHeight - imcapHeight) / 2 * camStride;
1121 }
1122
1123 *buffer = &camData[offset];
1124 *stride = camStride;
1125 *colorFormat = mCOLOR_XRGB8;
1126}
1127
1128static void _updateRotation(struct mRotationSource* source) {
1129 UNUSED(source);
1130 tiltX = 0;
1131 tiltY = 0;
1132 gyroZ = 0;
1133 _initSensors();
1134 if (tiltEnabled) {
1135 tiltX = sensorGetCallback(0, RETRO_SENSOR_ACCELEROMETER_X) * 3e8f;
1136 tiltY = sensorGetCallback(0, RETRO_SENSOR_ACCELEROMETER_Y) * -3e8f;
1137 }
1138 if (gyroEnabled) {
1139 gyroZ = sensorGetCallback(0, RETRO_SENSOR_GYROSCOPE_Z) * -1.1e9f;
1140 }
1141}
1142
1143static int32_t _readTiltX(struct mRotationSource* source) {
1144 UNUSED(source);
1145 return tiltX;
1146}
1147
1148static int32_t _readTiltY(struct mRotationSource* source) {
1149 UNUSED(source);
1150 return tiltY;
1151}
1152
1153static int32_t _readGyroZ(struct mRotationSource* source) {
1154 UNUSED(source);
1155 return gyroZ;
1156}