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 bool rumbleInitDone;
68static int rumbleUp;
69static int rumbleDown;
70static struct mRumble rumble;
71static struct GBALuminanceSource lux;
72static struct mRotationSource rotation;
73static bool tiltEnabled;
74static bool gyroEnabled;
75static int luxLevelIndex;
76static uint8_t luxLevel;
77static bool luxSensorEnabled;
78static bool luxSensorUsed;
79static struct mLogger logger;
80static struct retro_camera_callback cam;
81static struct mImageSource imageSource;
82static uint32_t* camData = NULL;
83static unsigned camWidth;
84static unsigned camHeight;
85static unsigned imcapWidth;
86static unsigned imcapHeight;
87static size_t camStride;
88static bool deferredSetup = false;
89static bool envVarsUpdated;
90static int32_t tiltX = 0;
91static int32_t tiltY = 0;
92static int32_t gyroZ = 0;
93
94static void _initSensors(void) {
95 if (sensorsInitDone) {
96 return;
97 }
98
99 struct retro_sensor_interface sensorInterface;
100 if (environCallback(RETRO_ENVIRONMENT_GET_SENSOR_INTERFACE, &sensorInterface)) {
101 sensorGetCallback = sensorInterface.get_sensor_input;
102 sensorStateCallback = sensorInterface.set_sensor_state;
103
104 if (sensorStateCallback && sensorGetCallback) {
105 if (sensorStateCallback(0, RETRO_SENSOR_ACCELEROMETER_ENABLE, EVENT_RATE)) {
106 tiltEnabled = true;
107 }
108
109 if (sensorStateCallback(0, RETRO_SENSOR_GYROSCOPE_ENABLE, EVENT_RATE)) {
110 gyroEnabled = true;
111 }
112
113 if (sensorStateCallback(0, RETRO_SENSOR_ILLUMINANCE_ENABLE, EVENT_RATE)) {
114 luxSensorEnabled = true;
115 }
116 }
117 }
118
119 sensorsInitDone = true;
120}
121
122static void _initRumble(void) {
123 if (rumbleInitDone) {
124 return;
125 }
126
127 struct retro_rumble_interface rumbleInterface;
128 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
129 rumbleCallback = rumbleInterface.set_rumble_state;
130 }
131
132 rumbleInitDone = true;
133}
134
135static void _reloadSettings(void) {
136 struct mCoreOptions opts = {
137 .useBios = true,
138 .volume = 0x100,
139 };
140
141 struct retro_variable var;
142#ifdef M_CORE_GB
143 enum GBModel model;
144 const char* modelName;
145
146 var.key = "mgba_gb_model";
147 var.value = 0;
148 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
149 if (strcmp(var.value, "Game Boy") == 0) {
150 model = GB_MODEL_DMG;
151 } else if (strcmp(var.value, "Super Game Boy") == 0) {
152 model = GB_MODEL_SGB;
153 } else if (strcmp(var.value, "Game Boy Color") == 0) {
154 model = GB_MODEL_CGB;
155 } else if (strcmp(var.value, "Game Boy Advance") == 0) {
156 model = GB_MODEL_AGB;
157 } else {
158 model = GB_MODEL_AUTODETECT;
159 }
160
161 modelName = GBModelToName(model);
162 mCoreConfigSetDefaultValue(&core->config, "gb.model", modelName);
163 mCoreConfigSetDefaultValue(&core->config, "sgb.model", modelName);
164 mCoreConfigSetDefaultValue(&core->config, "cgb.model", modelName);
165 }
166#endif
167
168 var.key = "mgba_use_bios";
169 var.value = 0;
170 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
171 opts.useBios = strcmp(var.value, "ON") == 0;
172 }
173
174 var.key = "mgba_skip_bios";
175 var.value = 0;
176 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
177 opts.skipBios = strcmp(var.value, "ON") == 0;
178 }
179
180#ifdef M_CORE_GB
181 var.key = "mgba_sgb_borders";
182 var.value = 0;
183 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
184 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", strcmp(var.value, "ON") == 0);
185 }
186#endif
187
188 var.key = "mgba_frameskip";
189 var.value = 0;
190 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
191 opts.frameskip = strtol(var.value, NULL, 10);
192 }
193
194 var.key = "mgba_idle_optimization";
195 var.value = 0;
196 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
197 if (strcmp(var.value, "Don't Remove") == 0) {
198 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
199 } else if (strcmp(var.value, "Remove Known") == 0) {
200 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
201 } else if (strcmp(var.value, "Detect and Remove") == 0) {
202 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
203 }
204 }
205
206#ifdef M_CORE_GBA
207 var.key = "mgba_force_gbp";
208 var.value = 0;
209 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
210 mCoreConfigSetDefaultIntValue(&core->config, "gba.forceGbp", strcmp(var.value, "ON") == 0);
211 }
212#endif
213
214 mCoreConfigLoadDefaults(&core->config, &opts);
215 mCoreLoadConfig(core);
216}
217
218static void _doDeferredSetup(void) {
219 // Libretro API doesn't let you know when it's done copying data into the save buffers.
220 // On the off-hand chance that a core actually expects its buffers to be populated when
221 // you actually first get them, you're out of luck without workarounds. Yup, seriously.
222 // Here's that workaround, but really the API needs to be thrown out and rewritten.
223 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
224 if (!core->loadSave(core, save)) {
225 save->close(save);
226 }
227 deferredSetup = false;
228}
229
230unsigned retro_api_version(void) {
231 return RETRO_API_VERSION;
232}
233
234void retro_set_environment(retro_environment_t env) {
235 environCallback = env;
236
237 libretro_set_core_options(environCallback);
238}
239
240void retro_set_video_refresh(retro_video_refresh_t video) {
241 videoCallback = video;
242}
243
244void retro_set_audio_sample(retro_audio_sample_t audio) {
245 UNUSED(audio);
246}
247
248void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
249 audioCallback = audioBatch;
250}
251
252void retro_set_input_poll(retro_input_poll_t inputPoll) {
253 inputPollCallback = inputPoll;
254}
255
256void retro_set_input_state(retro_input_state_t input) {
257 inputCallback = input;
258}
259
260void retro_get_system_info(struct retro_system_info* info) {
261 info->need_fullpath = false;
262#ifdef M_CORE_GB
263 info->valid_extensions = "gba|gb|gbc|sgb";
264#else
265 info->valid_extensions = "gba";
266#endif
267 info->library_version = projectVersion;
268 info->library_name = projectName;
269 info->block_extract = false;
270}
271
272void retro_get_system_av_info(struct retro_system_av_info* info) {
273 unsigned width, height;
274 core->desiredVideoDimensions(core, &width, &height);
275 info->geometry.base_width = width;
276 info->geometry.base_height = height;
277#ifdef M_CORE_GB
278 if (core->platform(core) == mPLATFORM_GB) {
279 info->geometry.max_width = 256;
280 info->geometry.max_height = 224;
281 } else
282#endif
283 {
284 info->geometry.max_width = width;
285 info->geometry.max_height = height;
286 }
287
288 info->geometry.aspect_ratio = width / (double) height;
289 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
290 info->timing.sample_rate = 32768;
291}
292
293void retro_init(void) {
294 enum retro_pixel_format fmt;
295#ifdef COLOR_16_BIT
296#ifdef COLOR_5_6_5
297 fmt = RETRO_PIXEL_FORMAT_RGB565;
298#else
299#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
300 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
301#endif
302#else
303#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
304 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
305#endif
306 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
307
308 struct retro_input_descriptor inputDescriptors[] = {
309 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
310 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
311 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
312 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
313 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
314 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
315 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
316 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
317 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
318 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
319 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
320 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
321 { 0 }
322 };
323 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
324
325 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
326
327 rumbleInitDone = false;
328 rumble.setRumble = _setRumble;
329 rumbleCallback = 0;
330
331 sensorsInitDone = false;
332 sensorGetCallback = 0;
333 sensorStateCallback = 0;
334
335 tiltEnabled = false;
336 gyroEnabled = false;
337 rotation.sample = _updateRotation;
338 rotation.readTiltX = _readTiltX;
339 rotation.readTiltY = _readTiltY;
340 rotation.readGyroZ = _readGyroZ;
341
342 envVarsUpdated = true;
343 luxSensorUsed = false;
344 luxSensorEnabled = false;
345 luxLevelIndex = 0;
346 luxLevel = 0;
347 lux.readLuminance = _readLux;
348 lux.sample = _updateLux;
349 _updateLux(&lux);
350
351 struct retro_log_callback log;
352 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
353 logCallback = log.log;
354 } else {
355 logCallback = 0;
356 }
357 logger.log = GBARetroLog;
358 mLogSetDefaultLogger(&logger);
359
360 stream.videoDimensionsChanged = 0;
361 stream.postAudioFrame = 0;
362 stream.postAudioBuffer = _postAudioBuffer;
363 stream.postVideoFrame = 0;
364
365 imageSource.startRequestImage = _startImage;
366 imageSource.stopRequestImage = _stopImage;
367 imageSource.requestImage = _requestImage;
368}
369
370void retro_deinit(void) {
371 free(outputBuffer);
372
373 if (sensorStateCallback) {
374 sensorStateCallback(0, RETRO_SENSOR_ACCELEROMETER_DISABLE, EVENT_RATE);
375 sensorStateCallback(0, RETRO_SENSOR_GYROSCOPE_DISABLE, EVENT_RATE);
376 sensorStateCallback(0, RETRO_SENSOR_ILLUMINANCE_DISABLE, EVENT_RATE);
377 sensorGetCallback = NULL;
378 sensorStateCallback = NULL;
379 }
380
381 tiltEnabled = false;
382 gyroEnabled = false;
383 luxSensorEnabled = false;
384 sensorsInitDone = false;
385}
386
387void retro_run(void) {
388 if (deferredSetup) {
389 _doDeferredSetup();
390 }
391 uint16_t keys;
392
393 inputPollCallback();
394
395 bool updated = false;
396 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
397 envVarsUpdated = true;
398
399 struct retro_variable var = {
400 .key = "mgba_allow_opposing_directions",
401 .value = 0
402 };
403 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
404 mCoreConfigSetIntValue(&core->config, "allowOpposingDirections", strcmp(var.value, "yes") == 0);
405 core->reloadConfigOption(core, "allowOpposingDirections", NULL);
406 }
407
408 var.key = "mgba_frameskip";
409 var.value = 0;
410 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
411 mCoreConfigSetIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
412 core->reloadConfigOption(core, "frameskip", NULL);
413 }
414 }
415
416 keys = 0;
417 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
418 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
419 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
420 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
421 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
422 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
423 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
424 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
425 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
426 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
427 core->setKeys(core, keys);
428
429 if (!luxSensorUsed) {
430 static bool wasAdjustingLux = false;
431 if (wasAdjustingLux) {
432 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
433 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
434 } else {
435 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
436 ++luxLevelIndex;
437 if (luxLevelIndex > 10) {
438 luxLevelIndex = 10;
439 }
440 wasAdjustingLux = true;
441 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
442 --luxLevelIndex;
443 if (luxLevelIndex < 0) {
444 luxLevelIndex = 0;
445 }
446 wasAdjustingLux = true;
447 }
448 }
449 }
450
451 core->runFrame(core);
452 unsigned width, height;
453 core->desiredVideoDimensions(core, &width, &height);
454 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
455
456 if (rumbleCallback) {
457 if (rumbleUp) {
458 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
459 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleUp * 0xFFFF / (rumbleUp + rumbleDown));
460 } else {
461 rumbleCallback(0, RETRO_RUMBLE_STRONG, 0);
462 rumbleCallback(0, RETRO_RUMBLE_WEAK, 0);
463 }
464 rumbleUp = 0;
465 rumbleDown = 0;
466 }
467}
468
469static void _setupMaps(struct mCore* core) {
470#ifdef M_CORE_GBA
471 if (core->platform(core) == mPLATFORM_GBA) {
472 struct GBA* gba = core->board;
473 struct retro_memory_descriptor descs[11];
474 struct retro_memory_map mmaps;
475 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
476
477 memset(descs, 0, sizeof(descs));
478 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
479
480 /* Map internal working RAM */
481 descs[0].ptr = gba->memory.iwram;
482 descs[0].start = BASE_WORKING_IRAM;
483 descs[0].len = SIZE_WORKING_IRAM;
484 descs[0].select = 0xFF000000;
485
486 /* Map working RAM */
487 descs[1].ptr = gba->memory.wram;
488 descs[1].start = BASE_WORKING_RAM;
489 descs[1].len = SIZE_WORKING_RAM;
490 descs[1].select = 0xFF000000;
491
492 /* Map save RAM */
493 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
494 descs[2].ptr = savedataSize ? savedata : NULL;
495 descs[2].start = BASE_CART_SRAM;
496 descs[2].len = savedataSize;
497
498 /* Map ROM */
499 descs[3].ptr = gba->memory.rom;
500 descs[3].start = BASE_CART0;
501 descs[3].len = romSize;
502 descs[3].flags = RETRO_MEMDESC_CONST;
503
504 descs[4].ptr = gba->memory.rom;
505 descs[4].start = BASE_CART1;
506 descs[4].len = romSize;
507 descs[4].flags = RETRO_MEMDESC_CONST;
508
509 descs[5].ptr = gba->memory.rom;
510 descs[5].start = BASE_CART2;
511 descs[5].len = romSize;
512 descs[5].flags = RETRO_MEMDESC_CONST;
513
514 /* Map BIOS */
515 descs[6].ptr = gba->memory.bios;
516 descs[6].start = BASE_BIOS;
517 descs[6].len = SIZE_BIOS;
518 descs[6].flags = RETRO_MEMDESC_CONST;
519
520 /* Map VRAM */
521 descs[7].ptr = gba->video.vram;
522 descs[7].start = BASE_VRAM;
523 descs[7].len = SIZE_VRAM;
524 descs[7].select = 0xFF000000;
525
526 /* Map palette RAM */
527 descs[8].ptr = gba->video.palette;
528 descs[8].start = BASE_PALETTE_RAM;
529 descs[8].len = SIZE_PALETTE_RAM;
530 descs[8].select = 0xFF000000;
531
532 /* Map OAM */
533 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
534 descs[9].start = BASE_OAM;
535 descs[9].len = SIZE_OAM;
536 descs[9].select = 0xFF000000;
537
538 /* Map mmapped I/O */
539 descs[10].ptr = gba->memory.io;
540 descs[10].start = BASE_IO;
541 descs[10].len = SIZE_IO;
542
543 mmaps.descriptors = descs;
544 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
545
546 bool yes = true;
547 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
548 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
549 }
550#endif
551#ifdef M_CORE_GB
552 if (core->platform(core) == mPLATFORM_GB) {
553 struct GB* gb = core->board;
554 struct retro_memory_descriptor descs[11];
555 struct retro_memory_map mmaps;
556
557 memset(descs, 0, sizeof(descs));
558 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
559
560 unsigned i = 0;
561
562 /* Map ROM */
563 descs[i].ptr = gb->memory.rom;
564 descs[i].start = GB_BASE_CART_BANK0;
565 descs[i].len = GB_SIZE_CART_BANK0;
566 descs[i].flags = RETRO_MEMDESC_CONST;
567 i++;
568
569 descs[i].ptr = gb->memory.rom;
570 descs[i].offset = GB_SIZE_CART_BANK0;
571 descs[i].start = GB_BASE_CART_BANK1;
572 descs[i].len = GB_SIZE_CART_BANK0;
573 descs[i].flags = RETRO_MEMDESC_CONST;
574 i++;
575
576 /* Map VRAM */
577 descs[i].ptr = gb->video.vram;
578 descs[i].start = GB_BASE_VRAM;
579 descs[i].len = GB_SIZE_VRAM_BANK0;
580 i++;
581
582 /* Map working RAM */
583 descs[i].ptr = gb->memory.wram;
584 descs[i].start = GB_BASE_WORKING_RAM_BANK0;
585 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
586 i++;
587
588 descs[i].ptr = gb->memory.wram;
589 descs[i].offset = GB_SIZE_WORKING_RAM_BANK0;
590 descs[i].start = GB_BASE_WORKING_RAM_BANK1;
591 descs[i].len = GB_SIZE_WORKING_RAM_BANK0;
592 i++;
593
594 /* Map OAM */
595 descs[i].ptr = &gb->video.oam; /* video.oam is a structure */
596 descs[i].start = GB_BASE_OAM;
597 descs[i].len = GB_SIZE_OAM;
598 descs[i].select = 0xFFFFFF60;
599 i++;
600
601 /* Map mmapped I/O */
602 descs[i].ptr = gb->memory.io;
603 descs[i].start = GB_BASE_IO;
604 descs[i].len = GB_SIZE_IO;
605 i++;
606
607 /* Map High RAM */
608 descs[i].ptr = gb->memory.hram;
609 descs[i].start = GB_BASE_HRAM;
610 descs[i].len = GB_SIZE_HRAM;
611 descs[i].select = 0xFFFFFF80;
612 i++;
613
614 /* Map IE Register */
615 descs[i].ptr = &gb->memory.ie;
616 descs[i].start = GB_BASE_IE;
617 descs[i].len = 1;
618 i++;
619
620 /* Map External RAM */
621 if (gb->memory.sram) {
622 descs[i].ptr = gb->memory.sram;
623 descs[i].start = GB_BASE_EXTERNAL_RAM;
624 descs[i].len = savedataSize;
625 i++;
626 }
627
628 if (gb->model >= GB_MODEL_CGB) {
629 /* Map working RAM */
630 /* banks 2-7 of wram mapped in virtual address so it can be
631 * accessed without bank switching, GBC only */
632 descs[i].ptr = gb->memory.wram + 0x2000;
633 descs[i].start = 0x10000;
634 descs[i].len = GB_SIZE_WORKING_RAM - 0x2000;
635 descs[i].select = 0xFFFFA000;
636 i++;
637 }
638
639 mmaps.descriptors = descs;
640 mmaps.num_descriptors = i;
641
642 bool yes = true;
643 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
644 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
645 }
646#endif
647}
648
649void retro_reset(void) {
650 core->reset(core);
651 _setupMaps(core);
652
653 rumbleUp = 0;
654 rumbleDown = 0;
655}
656
657bool retro_load_game(const struct retro_game_info* game) {
658 struct VFile* rom;
659 if (game->data) {
660 data = anonymousMemoryMap(game->size);
661 dataSize = game->size;
662 memcpy(data, game->data, game->size);
663 rom = VFileFromMemory(data, game->size);
664 } else {
665 data = 0;
666 rom = VFileOpen(game->path, O_RDONLY);
667 }
668 if (!rom) {
669 return false;
670 }
671
672 core = mCoreFindVF(rom);
673 if (!core) {
674 rom->close(rom);
675 mappedMemoryFree(data, game->size);
676 return false;
677 }
678 mCoreInitConfig(core, NULL);
679 core->init(core);
680 core->setAVStream(core, &stream);
681
682 size_t size = 256 * 224 * BYTES_PER_PIXEL;
683 outputBuffer = malloc(size);
684 memset(outputBuffer, 0xFF, size);
685 core->setVideoBuffer(core, outputBuffer, 256);
686
687 core->setAudioBufferSize(core, SAMPLES);
688
689 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
690 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
691
692 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
693
694 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
695 memset(savedata, 0xFF, SIZE_CART_FLASH1M);
696
697 _reloadSettings();
698 core->loadROM(core, rom);
699 deferredSetup = true;
700
701 const char* sysDir = 0;
702 const char* biosName = 0;
703 char biosPath[PATH_MAX];
704 environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
705
706#ifdef M_CORE_GBA
707 if (core->platform(core) == mPLATFORM_GBA) {
708 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
709 biosName = "gba_bios.bin";
710
711 }
712#endif
713
714#ifdef M_CORE_GB
715 if (core->platform(core) == mPLATFORM_GB) {
716 memset(&cam, 0, sizeof(cam));
717 cam.height = GBCAM_HEIGHT;
718 cam.width = GBCAM_WIDTH;
719 cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
720 cam.frame_raw_framebuffer = _updateCamera;
721 if (environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam)) {
722 core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
723 }
724
725 const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
726 struct GB* gb = core->board;
727
728 if (modelName) {
729 gb->model = GBNameToModel(modelName);
730 } else {
731 GBDetectModel(gb);
732 }
733
734 switch (gb->model) {
735 case GB_MODEL_AGB:
736 case GB_MODEL_CGB:
737 biosName = "gbc_bios.bin";
738 break;
739 case GB_MODEL_SGB:
740 biosName = "sgb_bios.bin";
741 break;
742 case GB_MODEL_DMG:
743 default:
744 biosName = "gb_bios.bin";
745 break;
746 }
747 }
748#endif
749
750 if (core->opts.useBios && sysDir && biosName) {
751 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
752 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
753 if (bios) {
754 core->loadBIOS(core, bios, 0);
755 }
756 }
757
758 core->reset(core);
759 _setupMaps(core);
760
761 return true;
762}
763
764void retro_unload_game(void) {
765 if (!core) {
766 return;
767 }
768 mCoreConfigDeinit(&core->config);
769 core->deinit(core);
770 mappedMemoryFree(data, dataSize);
771 data = 0;
772 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
773 savedata = 0;
774}
775
776size_t retro_serialize_size(void) {
777 if (deferredSetup) {
778 _doDeferredSetup();
779 }
780 struct VFile* vfm = VFileMemChunk(NULL, 0);
781 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
782 size_t size = vfm->size(vfm);
783 vfm->close(vfm);
784 return size;
785}
786
787bool retro_serialize(void* data, size_t size) {
788 if (deferredSetup) {
789 _doDeferredSetup();
790 }
791 struct VFile* vfm = VFileMemChunk(NULL, 0);
792 mCoreSaveStateNamed(core, vfm, SAVESTATE_SAVEDATA | SAVESTATE_RTC);
793 if ((ssize_t) size > vfm->size(vfm)) {
794 size = vfm->size(vfm);
795 } else if ((ssize_t) size < vfm->size(vfm)) {
796 vfm->close(vfm);
797 return false;
798 }
799 vfm->seek(vfm, 0, SEEK_SET);
800 vfm->read(vfm, data, size);
801 vfm->close(vfm);
802 return true;
803}
804
805bool retro_unserialize(const void* data, size_t size) {
806 if (deferredSetup) {
807 _doDeferredSetup();
808 }
809 struct VFile* vfm = VFileFromConstMemory(data, size);
810 bool success = mCoreLoadStateNamed(core, vfm, SAVESTATE_RTC);
811 vfm->close(vfm);
812 return success;
813}
814
815void retro_cheat_reset(void) {
816 mCheatDeviceClear(core->cheatDevice(core));
817}
818
819void retro_cheat_set(unsigned index, bool enabled, const char* code) {
820 UNUSED(index);
821 UNUSED(enabled);
822 struct mCheatDevice* device = core->cheatDevice(core);
823 struct mCheatSet* cheatSet = NULL;
824 if (mCheatSetsSize(&device->cheats)) {
825 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
826 } else {
827 cheatSet = device->createSet(device, NULL);
828 mCheatAddSet(device, cheatSet);
829 }
830// Convert the super wonky unportable libretro format to something normal
831#ifdef M_CORE_GBA
832 if (core->platform(core) == mPLATFORM_GBA) {
833 char realCode[] = "XXXXXXXX XXXXXXXX";
834 size_t len = strlen(code) + 1; // Include null terminator
835 size_t i, pos;
836 for (i = 0, pos = 0; i < len; ++i) {
837 if (isspace((int) code[i]) || code[i] == '+') {
838 realCode[pos] = ' ';
839 } else {
840 realCode[pos] = code[i];
841 }
842 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
843 realCode[pos] = '\0';
844 mCheatAddLine(cheatSet, realCode, 0);
845 pos = 0;
846 continue;
847 }
848 ++pos;
849 }
850 }
851#endif
852#ifdef M_CORE_GB
853 if (core->platform(core) == mPLATFORM_GB) {
854 char realCode[] = "XXX-XXX-XXX";
855 size_t len = strlen(code) + 1; // Include null terminator
856 size_t i, pos;
857 for (i = 0, pos = 0; i < len; ++i) {
858 if (isspace((int) code[i]) || code[i] == '+') {
859 realCode[pos] = '\0';
860 } else {
861 realCode[pos] = code[i];
862 }
863 if (pos == 11 || !realCode[pos]) {
864 realCode[pos] = '\0';
865 mCheatAddLine(cheatSet, realCode, 0);
866 pos = 0;
867 continue;
868 }
869 ++pos;
870 }
871 }
872#endif
873 cheatSet->refresh(cheatSet, device);
874}
875
876unsigned retro_get_region(void) {
877 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
878}
879
880void retro_set_controller_port_device(unsigned port, unsigned device) {
881 UNUSED(port);
882 UNUSED(device);
883}
884
885bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
886 UNUSED(game_type);
887 UNUSED(info);
888 UNUSED(num_info);
889 return false;
890}
891
892void* retro_get_memory_data(unsigned id) {
893 switch (id) {
894 case RETRO_MEMORY_SAVE_RAM:
895 return savedata;
896 case RETRO_MEMORY_RTC:
897 switch (core->platform(core)) {
898#ifdef M_CORE_GB
899 case mPLATFORM_GB:
900 switch (((struct GB*) core->board)->memory.mbcType) {
901 case GB_MBC3_RTC:
902 return &((uint8_t*) savedata)[((struct GB*) core->board)->sramSize];
903 default:
904 return NULL;
905 }
906#endif
907 default:
908 return NULL;
909 }
910 default:
911 break;
912 }
913 return NULL;
914}
915
916size_t retro_get_memory_size(unsigned id) {
917 switch (id) {
918 case RETRO_MEMORY_SAVE_RAM:
919 switch (core->platform(core)) {
920#ifdef M_CORE_GBA
921 case mPLATFORM_GBA:
922 switch (((struct GBA*) core->board)->memory.savedata.type) {
923 case SAVEDATA_AUTODETECT:
924 return SIZE_CART_FLASH1M;
925 default:
926 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
927 }
928#endif
929#ifdef M_CORE_GB
930 case mPLATFORM_GB:
931 return ((struct GB*) core->board)->sramSize;
932#endif
933 default:
934 break;
935 }
936 break;
937 case RETRO_MEMORY_RTC:
938 switch (core->platform(core)) {
939#ifdef M_CORE_GB
940 case mPLATFORM_GB:
941 switch (((struct GB*) core->board)->memory.mbcType) {
942 case GB_MBC3_RTC:
943 return sizeof(struct GBMBCRTCSaveBuffer);
944 default:
945 return 0;
946 }
947#endif
948 default:
949 break;
950 }
951 break;
952 default:
953 break;
954 }
955 return 0;
956}
957
958void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
959 UNUSED(logger);
960 if (!logCallback) {
961 return;
962 }
963
964 char message[128];
965 vsnprintf(message, sizeof(message), format, args);
966
967 enum retro_log_level retroLevel = RETRO_LOG_INFO;
968 switch (level) {
969 case mLOG_ERROR:
970 case mLOG_FATAL:
971 retroLevel = RETRO_LOG_ERROR;
972 break;
973 case mLOG_WARN:
974 retroLevel = RETRO_LOG_WARN;
975 break;
976 case mLOG_INFO:
977 retroLevel = RETRO_LOG_INFO;
978 break;
979 case mLOG_GAME_ERROR:
980 case mLOG_STUB:
981#ifdef NDEBUG
982 return;
983#else
984 retroLevel = RETRO_LOG_DEBUG;
985 break;
986#endif
987 case mLOG_DEBUG:
988 retroLevel = RETRO_LOG_DEBUG;
989 break;
990 }
991#ifdef NDEBUG
992 static int biosCat = -1;
993 if (biosCat < 0) {
994 biosCat = mLogCategoryById("gba.bios");
995 }
996
997 if (category == biosCat) {
998 return;
999 }
1000#endif
1001 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
1002}
1003
1004static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
1005 UNUSED(stream);
1006 int16_t samples[SAMPLES * 2];
1007 blip_read_samples(left, samples, SAMPLES, true);
1008 blip_read_samples(right, samples + 1, SAMPLES, true);
1009 audioCallback(samples, SAMPLES);
1010}
1011
1012static void _setRumble(struct mRumble* rumble, int enable) {
1013 UNUSED(rumble);
1014 if (!rumbleInitDone) {
1015 _initRumble();
1016 }
1017 if (!rumbleCallback) {
1018 return;
1019 }
1020 if (enable) {
1021 ++rumbleUp;
1022 } else {
1023 ++rumbleDown;
1024 }
1025}
1026
1027static void _updateLux(struct GBALuminanceSource* lux) {
1028 UNUSED(lux);
1029 struct retro_variable var = {
1030 .key = "mgba_solar_sensor_level",
1031 .value = 0
1032 };
1033 bool luxVarUpdated = envVarsUpdated;
1034
1035 if (luxVarUpdated && (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value)) {
1036 luxVarUpdated = false;
1037 }
1038
1039 if (luxVarUpdated) {
1040 luxSensorUsed = strcmp(var.value, "sensor") == 0;
1041 }
1042
1043 if (luxSensorUsed) {
1044 _initSensors();
1045 float fLux = luxSensorEnabled ? sensorGetCallback(0, RETRO_SENSOR_ILLUMINANCE) : 0.0f;
1046 luxLevel = cbrtf(fLux) * 8;
1047 } else {
1048 if (luxVarUpdated) {
1049 char* end;
1050 int newLuxLevelIndex = strtol(var.value, &end, 10);
1051
1052 if (!*end) {
1053 if (newLuxLevelIndex > 10) {
1054 luxLevelIndex = 10;
1055 } else if (newLuxLevelIndex < 0) {
1056 luxLevelIndex = 0;
1057 } else {
1058 luxLevelIndex = newLuxLevelIndex;
1059 }
1060 }
1061 }
1062
1063 luxLevel = 0x16;
1064 if (luxLevelIndex > 0) {
1065 luxLevel += GBA_LUX_LEVELS[luxLevelIndex - 1];
1066 }
1067 }
1068
1069 envVarsUpdated = false;
1070}
1071
1072static uint8_t _readLux(struct GBALuminanceSource* lux) {
1073 UNUSED(lux);
1074 return 0xFF - luxLevel;
1075}
1076
1077static void _updateCamera(const uint32_t* buffer, unsigned width, unsigned height, size_t pitch) {
1078 if (!camData || width > camWidth || height > camHeight) {
1079 if (camData) {
1080 free(camData);
1081 camData = NULL;
1082 }
1083 unsigned bufPitch = pitch / sizeof(*buffer);
1084 unsigned bufHeight = height;
1085 if (imcapWidth > bufPitch) {
1086 bufPitch = imcapWidth;
1087 }
1088 if (imcapHeight > bufHeight) {
1089 bufHeight = imcapHeight;
1090 }
1091 camData = malloc(sizeof(*buffer) * bufHeight * bufPitch);
1092 memset(camData, 0xFF, sizeof(*buffer) * bufHeight * bufPitch);
1093 camWidth = width;
1094 camHeight = bufHeight;
1095 camStride = bufPitch;
1096 }
1097 size_t i;
1098 for (i = 0; i < height; ++i) {
1099 memcpy(&camData[camStride * i], &buffer[pitch * i / sizeof(*buffer)], pitch);
1100 }
1101}
1102
1103static void _startImage(struct mImageSource* image, unsigned w, unsigned h, int colorFormats) {
1104 UNUSED(image);
1105 UNUSED(colorFormats);
1106
1107 if (camData) {
1108 free(camData);
1109 }
1110 camData = NULL;
1111 imcapWidth = w;
1112 imcapHeight = h;
1113 cam.start();
1114}
1115
1116static void _stopImage(struct mImageSource* image) {
1117 UNUSED(image);
1118 cam.stop();
1119}
1120
1121static void _requestImage(struct mImageSource* image, const void** buffer, size_t* stride, enum mColorFormat* colorFormat) {
1122 UNUSED(image);
1123 if (!camData) {
1124 cam.start();
1125 *buffer = NULL;
1126 return;
1127 }
1128 size_t offset = 0;
1129 if (imcapWidth < camWidth) {
1130 offset += (camWidth - imcapWidth) / 2;
1131 }
1132 if (imcapHeight < camHeight) {
1133 offset += (camHeight - imcapHeight) / 2 * camStride;
1134 }
1135
1136 *buffer = &camData[offset];
1137 *stride = camStride;
1138 *colorFormat = mCOLOR_XRGB8;
1139}
1140
1141static void _updateRotation(struct mRotationSource* source) {
1142 UNUSED(source);
1143 tiltX = 0;
1144 tiltY = 0;
1145 gyroZ = 0;
1146 _initSensors();
1147 if (tiltEnabled) {
1148 tiltX = sensorGetCallback(0, RETRO_SENSOR_ACCELEROMETER_X) * 3e8f;
1149 tiltY = sensorGetCallback(0, RETRO_SENSOR_ACCELEROMETER_Y) * -3e8f;
1150 }
1151 if (gyroEnabled) {
1152 gyroZ = sensorGetCallback(0, RETRO_SENSOR_GYROSCOPE_Z) * -1.1e9f;
1153 }
1154}
1155
1156static int32_t _readTiltX(struct mRotationSource* source) {
1157 UNUSED(source);
1158 return tiltX;
1159}
1160
1161static int32_t _readTiltY(struct mRotationSource* source) {
1162 UNUSED(source);
1163 return tiltY;
1164}
1165
1166static int32_t _readGyroZ(struct mRotationSource* source) {
1167 UNUSED(source);
1168 return gyroZ;
1169}