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/version.h>
15#ifdef M_CORE_GB
16#include <mgba/gb/core.h>
17#include <mgba/internal/gb/gb.h>
18#endif
19#ifdef M_CORE_GBA
20#include <mgba/gba/core.h>
21#include <mgba/gba/interface.h>
22#include <mgba/internal/gba/gba.h>
23#endif
24#include <mgba-util/circle-buffer.h>
25#include <mgba-util/memory.h>
26#include <mgba-util/vfs.h>
27
28#define SAMPLES 1024
29#define RUMBLE_PWM 35
30
31static retro_environment_t environCallback;
32static retro_video_refresh_t videoCallback;
33static retro_audio_sample_batch_t audioCallback;
34static retro_input_poll_t inputPollCallback;
35static retro_input_state_t inputCallback;
36static retro_log_printf_t logCallback;
37static retro_set_rumble_state_t rumbleCallback;
38
39static void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args);
40
41static void _postAudioBuffer(struct mAVStream*, blip_t* left, blip_t* right);
42static void _setRumble(struct mRumble* rumble, int enable);
43static uint8_t _readLux(struct GBALuminanceSource* lux);
44static void _updateLux(struct GBALuminanceSource* lux);
45
46static struct mCore* core;
47static void* outputBuffer;
48static void* data;
49static size_t dataSize;
50static void* savedata;
51static struct mAVStream stream;
52static int rumbleLevel;
53static struct CircleBuffer rumbleHistory;
54static struct mRumble rumble;
55static struct GBALuminanceSource lux;
56static int luxLevel;
57static struct mLogger logger;
58
59static void _reloadSettings(void) {
60 struct mCoreOptions opts = {
61 .useBios = true,
62 .volume = 0x100,
63 };
64
65 struct retro_variable var;
66
67 var.key = "mgba_use_bios";
68 var.value = 0;
69 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
70 opts.useBios = strcmp(var.value, "ON") == 0;
71 }
72
73 var.key = "mgba_skip_bios";
74 var.value = 0;
75 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
76 opts.skipBios = strcmp(var.value, "ON") == 0;
77 }
78
79 var.key = "mgba_idle_optimization";
80 var.value = 0;
81 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
82 if (strcmp(var.value, "Don't Remove") == 0) {
83 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
84 } else if (strcmp(var.value, "Remove Known") == 0) {
85 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
86 } else if (strcmp(var.value, "Detect and Remove") == 0) {
87 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
88 }
89 }
90
91 var.key = "mgba_frameskip";
92 var.value = 0;
93 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
94 opts.frameskip = strtol(var.value, NULL, 10);
95
96 }
97
98 mCoreConfigLoadDefaults(&core->config, &opts);
99 mCoreLoadConfig(core);
100}
101
102unsigned retro_api_version(void) {
103 return RETRO_API_VERSION;
104}
105
106void retro_set_environment(retro_environment_t env) {
107 environCallback = env;
108
109 struct retro_variable vars[] = {
110 { "mgba_solar_sensor_level", "Solar sensor level; 0|1|2|3|4|5|6|7|8|9|10" },
111 { "mgba_allow_opposing_directions", "Allow opposing directional input; OFF|ON" },
112 { "mgba_use_bios", "Use BIOS file if found (requires restart); ON|OFF" },
113 { "mgba_skip_bios", "Skip BIOS intro (requires restart); OFF|ON" },
114 { "mgba_idle_optimization", "Idle loop removal; Remove Known|Detect and Remove|Don't Remove" },
115 { "mgba_frameskip", "Frameskip; 0|1|2|3|4|5|6|7|8|9|10" },
116 { 0, 0 }
117 };
118
119 environCallback(RETRO_ENVIRONMENT_SET_VARIABLES, vars);
120}
121
122void retro_set_video_refresh(retro_video_refresh_t video) {
123 videoCallback = video;
124}
125
126void retro_set_audio_sample(retro_audio_sample_t audio) {
127 UNUSED(audio);
128}
129
130void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
131 audioCallback = audioBatch;
132}
133
134void retro_set_input_poll(retro_input_poll_t inputPoll) {
135 inputPollCallback = inputPoll;
136}
137
138void retro_set_input_state(retro_input_state_t input) {
139 inputCallback = input;
140}
141
142void retro_get_system_info(struct retro_system_info* info) {
143 info->need_fullpath = false;
144 info->valid_extensions = "gba|gb|gbc";
145 info->library_version = projectVersion;
146 info->library_name = projectName;
147 info->block_extract = false;
148}
149
150void retro_get_system_av_info(struct retro_system_av_info* info) {
151 unsigned width, height;
152 core->desiredVideoDimensions(core, &width, &height);
153 info->geometry.base_width = width;
154 info->geometry.base_height = height;
155 info->geometry.max_width = width;
156 info->geometry.max_height = height;
157 info->geometry.aspect_ratio = width / (double) height;
158 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
159 info->timing.sample_rate = 32768;
160}
161
162void retro_init(void) {
163 enum retro_pixel_format fmt;
164#ifdef COLOR_16_BIT
165#ifdef COLOR_5_6_5
166 fmt = RETRO_PIXEL_FORMAT_RGB565;
167#else
168#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
169 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
170#endif
171#else
172#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
173 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
174#endif
175 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
176
177 struct retro_input_descriptor inputDescriptors[] = {
178 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
179 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
180 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
181 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
182 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
183 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
184 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
185 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
186 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
187 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
188 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
189 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
190 { 0 }
191 };
192 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
193
194 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
195
196 struct retro_rumble_interface rumbleInterface;
197 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
198 rumbleCallback = rumbleInterface.set_rumble_state;
199 CircleBufferInit(&rumbleHistory, RUMBLE_PWM);
200 rumble.setRumble = _setRumble;
201 } else {
202 rumbleCallback = 0;
203 }
204
205 luxLevel = 0;
206 lux.readLuminance = _readLux;
207 lux.sample = _updateLux;
208 _updateLux(&lux);
209
210 struct retro_log_callback log;
211 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
212 logCallback = log.log;
213 } else {
214 logCallback = 0;
215 }
216 logger.log = GBARetroLog;
217 mLogSetDefaultLogger(&logger);
218
219 stream.videoDimensionsChanged = 0;
220 stream.postAudioFrame = 0;
221 stream.postAudioBuffer = _postAudioBuffer;
222 stream.postVideoFrame = 0;
223 stream.videoFrameRateChanged = 0;
224}
225
226void retro_deinit(void) {
227 free(outputBuffer);
228}
229
230void retro_run(void) {
231 uint16_t keys;
232 inputPollCallback();
233
234 bool updated = false;
235 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
236 struct retro_variable var = {
237 .key = "mgba_allow_opposing_directions",
238 .value = 0
239 };
240 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
241 ((struct GBA*) core->board)->allowOpposingDirections = strcmp(var.value, "yes") == 0;
242 }
243
244 var.key = "mgba_frameskip";
245 var.value = 0;
246 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
247 mCoreConfigSetUIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
248 mCoreLoadConfig(core);
249 }
250 }
251
252 keys = 0;
253 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
254 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
255 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
256 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
257 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
258 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
259 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
260 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
261 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
262 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
263 core->setKeys(core, keys);
264
265 static bool wasAdjustingLux = false;
266 if (wasAdjustingLux) {
267 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
268 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
269 } else {
270 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
271 ++luxLevel;
272 if (luxLevel > 10) {
273 luxLevel = 10;
274 }
275 wasAdjustingLux = true;
276 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
277 --luxLevel;
278 if (luxLevel < 0) {
279 luxLevel = 0;
280 }
281 wasAdjustingLux = true;
282 }
283 }
284
285 core->runFrame(core);
286 unsigned width, height;
287 core->desiredVideoDimensions(core, &width, &height);
288 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
289}
290
291void static _setupMaps(struct mCore* core) {
292#ifdef M_CORE_GBA
293 if (core->platform(core) == PLATFORM_GBA) {
294 struct GBA* gba = core->board;
295 struct retro_memory_descriptor descs[11];
296 struct retro_memory_map mmaps;
297 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
298
299 memset(descs, 0, sizeof(descs));
300 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
301
302 /* Map internal working RAM */
303 descs[0].ptr = gba->memory.iwram;
304 descs[0].start = BASE_WORKING_IRAM;
305 descs[0].len = SIZE_WORKING_IRAM;
306 descs[0].select = 0xFF000000;
307
308 /* Map working RAM */
309 descs[1].ptr = gba->memory.wram;
310 descs[1].start = BASE_WORKING_RAM;
311 descs[1].len = SIZE_WORKING_RAM;
312 descs[1].select = 0xFF000000;
313
314 /* Map save RAM */
315 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
316 descs[2].ptr = savedataSize ? savedata : NULL;
317 descs[2].start = BASE_CART_SRAM;
318 descs[2].len = savedataSize;
319
320 /* Map ROM */
321 descs[3].ptr = gba->memory.rom;
322 descs[3].start = BASE_CART0;
323 descs[3].len = romSize;
324 descs[3].flags = RETRO_MEMDESC_CONST;
325
326 descs[4].ptr = gba->memory.rom;
327 descs[4].start = BASE_CART1;
328 descs[4].len = romSize;
329 descs[4].flags = RETRO_MEMDESC_CONST;
330
331 descs[5].ptr = gba->memory.rom;
332 descs[5].start = BASE_CART2;
333 descs[5].len = romSize;
334 descs[5].flags = RETRO_MEMDESC_CONST;
335
336 /* Map BIOS */
337 descs[6].ptr = gba->memory.bios;
338 descs[6].start = BASE_BIOS;
339 descs[6].len = SIZE_BIOS;
340 descs[6].flags = RETRO_MEMDESC_CONST;
341
342 /* Map VRAM */
343 descs[7].ptr = gba->video.vram;
344 descs[7].start = BASE_VRAM;
345 descs[7].len = SIZE_VRAM;
346 descs[7].select = 0xFF000000;
347
348 /* Map palette RAM */
349 descs[8].ptr = gba->video.palette;
350 descs[8].start = BASE_PALETTE_RAM;
351 descs[8].len = SIZE_PALETTE_RAM;
352 descs[8].select = 0xFF000000;
353
354 /* Map OAM */
355 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
356 descs[9].start = BASE_OAM;
357 descs[9].len = SIZE_OAM;
358 descs[9].select = 0xFF000000;
359
360 /* Map mmapped I/O */
361 descs[10].ptr = gba->memory.io;
362 descs[10].start = BASE_IO;
363 descs[10].len = SIZE_IO;
364
365 mmaps.descriptors = descs;
366 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
367
368 bool yes = true;
369 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
370 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
371 }
372#endif
373}
374
375void retro_reset(void) {
376 core->reset(core);
377 _setupMaps(core);
378
379 if (rumbleCallback) {
380 CircleBufferClear(&rumbleHistory);
381 }
382}
383
384bool retro_load_game(const struct retro_game_info* game) {
385 struct VFile* rom;
386 if (game->data) {
387 data = anonymousMemoryMap(game->size);
388 dataSize = game->size;
389 memcpy(data, game->data, game->size);
390 rom = VFileFromMemory(data, game->size);
391 } else {
392 data = 0;
393 rom = VFileOpen(game->path, O_RDONLY);
394 }
395 if (!rom) {
396 return false;
397 }
398
399 core = mCoreFindVF(rom);
400 if (!core) {
401 rom->close(rom);
402 mappedMemoryFree(data, game->size);
403 return false;
404 }
405 mCoreInitConfig(core, NULL);
406 core->init(core);
407 core->setAVStream(core, &stream);
408
409 outputBuffer = malloc(256 * 224 * BYTES_PER_PIXEL);
410 core->setVideoBuffer(core, outputBuffer, 256);
411
412 core->setAudioBufferSize(core, SAMPLES);
413
414 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
415 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
416
417 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
418
419 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
420 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
421
422 _reloadSettings();
423 core->loadROM(core, rom);
424 core->loadSave(core, save);
425
426#ifdef M_CORE_GBA
427 if (core->platform(core) == PLATFORM_GBA) {
428 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
429
430 const char* sysDir = 0;
431 if (core->opts.useBios && environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir)) {
432 char biosPath[PATH_MAX];
433 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, "gba_bios.bin");
434 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
435 if (bios) {
436 core->loadBIOS(core, bios, 0);
437 }
438 }
439 }
440#endif
441
442 core->reset(core);
443 _setupMaps(core);
444
445 return true;
446}
447
448void retro_unload_game(void) {
449 if (!core) {
450 return;
451 }
452 core->deinit(core);
453 mappedMemoryFree(data, dataSize);
454 data = 0;
455 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
456 savedata = 0;
457 CircleBufferDeinit(&rumbleHistory);
458}
459
460size_t retro_serialize_size(void) {
461 return core->stateSize(core);
462}
463
464bool retro_serialize(void* data, size_t size) {
465 if (size != retro_serialize_size()) {
466 return false;
467 }
468 core->saveState(core, data);
469 return true;
470}
471
472bool retro_unserialize(const void* data, size_t size) {
473 if (size != retro_serialize_size()) {
474 return false;
475 }
476 core->loadState(core, data);
477 return true;
478}
479
480void retro_cheat_reset(void) {
481 mCheatDeviceClear(core->cheatDevice(core));
482}
483
484void retro_cheat_set(unsigned index, bool enabled, const char* code) {
485 UNUSED(index);
486 UNUSED(enabled);
487 struct mCheatDevice* device = core->cheatDevice(core);
488 struct mCheatSet* cheatSet = NULL;
489 if (mCheatSetsSize(&device->cheats)) {
490 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
491 } else {
492 cheatSet = device->createSet(device, NULL);
493 mCheatAddSet(device, cheatSet);
494 }
495 // Convert the super wonky unportable libretro format to something normal
496 char realCode[] = "XXXXXXXX XXXXXXXX";
497 size_t len = strlen(code) + 1; // Include null terminator
498 size_t i, pos;
499 for (i = 0, pos = 0; i < len; ++i) {
500 if (isspace((int) code[i]) || code[i] == '+') {
501 realCode[pos] = ' ';
502 } else {
503 realCode[pos] = code[i];
504 }
505 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
506 realCode[pos] = '\0';
507 mCheatAddLine(cheatSet, realCode, 0);
508 pos = 0;
509 continue;
510 }
511 ++pos;
512 }
513}
514
515unsigned retro_get_region(void) {
516 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
517}
518
519void retro_set_controller_port_device(unsigned port, unsigned device) {
520 UNUSED(port);
521 UNUSED(device);
522}
523
524bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
525 UNUSED(game_type);
526 UNUSED(info);
527 UNUSED(num_info);
528 return false;
529}
530
531void* retro_get_memory_data(unsigned id) {
532 if (id != RETRO_MEMORY_SAVE_RAM) {
533 return 0;
534 }
535 return savedata;
536}
537
538size_t retro_get_memory_size(unsigned id) {
539 if (id != RETRO_MEMORY_SAVE_RAM) {
540 return 0;
541 }
542#ifdef M_CORE_GBA
543 if (core->platform(core) == PLATFORM_GBA) {
544 switch (((struct GBA*) core->board)->memory.savedata.type) {
545 case SAVEDATA_AUTODETECT:
546 return SIZE_CART_FLASH1M;
547 default:
548 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
549 }
550 }
551#endif
552#ifdef M_CORE_GB
553 if (core->platform(core) == PLATFORM_GB) {
554 return ((struct GB*) core->board)->sramSize;
555 }
556#endif
557 return 0;
558}
559
560void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
561 UNUSED(logger);
562 if (!logCallback) {
563 return;
564 }
565
566 char message[128];
567 vsnprintf(message, sizeof(message), format, args);
568
569 enum retro_log_level retroLevel = RETRO_LOG_INFO;
570 switch (level) {
571 case mLOG_ERROR:
572 case mLOG_FATAL:
573 retroLevel = RETRO_LOG_ERROR;
574 break;
575 case mLOG_WARN:
576 retroLevel = RETRO_LOG_WARN;
577 break;
578 case mLOG_INFO:
579 retroLevel = RETRO_LOG_INFO;
580 break;
581 case mLOG_GAME_ERROR:
582 case mLOG_STUB:
583#ifdef NDEBUG
584 return;
585#else
586 retroLevel = RETRO_LOG_DEBUG;
587 break;
588#endif
589 case mLOG_DEBUG:
590 retroLevel = RETRO_LOG_DEBUG;
591 break;
592 }
593#ifdef NDEBUG
594 static int biosCat = -1;
595 if (biosCat < 0) {
596 biosCat = mLogCategoryById("gba.bios");
597 }
598
599 if (category == biosCat) {
600 return;
601 }
602#endif
603 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
604}
605
606static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
607 UNUSED(stream);
608 int16_t samples[SAMPLES * 2];
609 blip_read_samples(left, samples, SAMPLES, true);
610 blip_read_samples(right, samples + 1, SAMPLES, true);
611 audioCallback(samples, SAMPLES);
612}
613
614static void _setRumble(struct mRumble* rumble, int enable) {
615 UNUSED(rumble);
616 if (!rumbleCallback) {
617 return;
618 }
619 rumbleLevel += enable;
620 if (CircleBufferSize(&rumbleHistory) == RUMBLE_PWM) {
621 int8_t oldLevel;
622 CircleBufferRead8(&rumbleHistory, &oldLevel);
623 rumbleLevel -= oldLevel;
624 }
625 CircleBufferWrite8(&rumbleHistory, enable);
626 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleLevel * 0xFFFF / RUMBLE_PWM);
627 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleLevel * 0xFFFF / RUMBLE_PWM);
628}
629
630static void _updateLux(struct GBALuminanceSource* lux) {
631 UNUSED(lux);
632 struct retro_variable var = {
633 .key = "mgba_solar_sensor_level",
634 .value = 0
635 };
636
637 bool updated = false;
638 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
639 return;
640 }
641 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
642 return;
643 }
644
645 char* end;
646 int newLuxLevel = strtol(var.value, &end, 10);
647 if (!*end) {
648 if (newLuxLevel > 10) {
649 luxLevel = 10;
650 } else if (newLuxLevel < 0) {
651 luxLevel = 0;
652 } else {
653 luxLevel = newLuxLevel;
654 }
655 }
656}
657
658static uint8_t _readLux(struct GBALuminanceSource* lux) {
659 UNUSED(lux);
660 int value = 0x16;
661 if (luxLevel > 0) {
662 value += GBA_LUX_LEVELS[luxLevel - 1];
663 }
664 return 0xFF - value;
665}