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