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_sgb_borders";
80 var.value = 0;
81 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
82 if (strcmp(var.value, "ON") == 0) {
83 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", true);
84 } else {
85 mCoreConfigSetDefaultIntValue(&core->config, "sgb.borders", false);
86 }
87 }
88
89 var.key = "mgba_idle_optimization";
90 var.value = 0;
91 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
92 if (strcmp(var.value, "Don't Remove") == 0) {
93 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "ignore");
94 } else if (strcmp(var.value, "Remove Known") == 0) {
95 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "remove");
96 } else if (strcmp(var.value, "Detect and Remove") == 0) {
97 mCoreConfigSetDefaultValue(&core->config, "idleOptimization", "detect");
98 }
99 }
100
101 var.key = "mgba_frameskip";
102 var.value = 0;
103 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
104 opts.frameskip = strtol(var.value, NULL, 10);
105
106 }
107
108 mCoreConfigLoadDefaults(&core->config, &opts);
109 mCoreLoadConfig(core);
110}
111
112unsigned retro_api_version(void) {
113 return RETRO_API_VERSION;
114}
115
116void retro_set_environment(retro_environment_t env) {
117 environCallback = env;
118
119 struct retro_variable vars[] = {
120 { "mgba_solar_sensor_level", "Solar sensor level; 0|1|2|3|4|5|6|7|8|9|10" },
121 { "mgba_allow_opposing_directions", "Allow opposing directional input; OFF|ON" },
122 { "mgba_use_bios", "Use BIOS file if found (requires restart); ON|OFF" },
123 { "mgba_skip_bios", "Skip BIOS intro (requires restart); OFF|ON" },
124 { "mgba_sgb_borders", "Use Super Game Boy borders (requires restart); ON|OFF" },
125 { "mgba_idle_optimization", "Idle loop removal; Remove Known|Detect and Remove|Don't Remove" },
126 { "mgba_frameskip", "Frameskip; 0|1|2|3|4|5|6|7|8|9|10" },
127 { 0, 0 }
128 };
129
130 environCallback(RETRO_ENVIRONMENT_SET_VARIABLES, vars);
131}
132
133void retro_set_video_refresh(retro_video_refresh_t video) {
134 videoCallback = video;
135}
136
137void retro_set_audio_sample(retro_audio_sample_t audio) {
138 UNUSED(audio);
139}
140
141void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
142 audioCallback = audioBatch;
143}
144
145void retro_set_input_poll(retro_input_poll_t inputPoll) {
146 inputPollCallback = inputPoll;
147}
148
149void retro_set_input_state(retro_input_state_t input) {
150 inputCallback = input;
151}
152
153void retro_get_system_info(struct retro_system_info* info) {
154 info->need_fullpath = false;
155 info->valid_extensions = "gba|gb|gbc";
156 info->library_version = projectVersion;
157 info->library_name = projectName;
158 info->block_extract = false;
159}
160
161void retro_get_system_av_info(struct retro_system_av_info* info) {
162 unsigned width, height;
163 core->desiredVideoDimensions(core, &width, &height);
164 info->geometry.base_width = width;
165 info->geometry.base_height = height;
166 info->geometry.max_width = width;
167 info->geometry.max_height = height;
168 info->geometry.aspect_ratio = width / (double) height;
169 info->timing.fps = core->frequency(core) / (float) core->frameCycles(core);
170 info->timing.sample_rate = 32768;
171}
172
173void retro_init(void) {
174 enum retro_pixel_format fmt;
175#ifdef COLOR_16_BIT
176#ifdef COLOR_5_6_5
177 fmt = RETRO_PIXEL_FORMAT_RGB565;
178#else
179#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
180 fmt = RETRO_PIXEL_FORMAT_0RGB1555;
181#endif
182#else
183#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
184 fmt = RETRO_PIXEL_FORMAT_XRGB8888;
185#endif
186 environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
187
188 struct retro_input_descriptor inputDescriptors[] = {
189 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
190 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
191 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
192 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
193 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
194 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
195 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
196 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
197 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
198 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
199 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
200 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" },
201 { 0 }
202 };
203 environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
204
205 // TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
206
207 struct retro_rumble_interface rumbleInterface;
208 if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
209 rumbleCallback = rumbleInterface.set_rumble_state;
210 CircleBufferInit(&rumbleHistory, RUMBLE_PWM);
211 rumble.setRumble = _setRumble;
212 } else {
213 rumbleCallback = 0;
214 }
215
216 luxLevel = 0;
217 lux.readLuminance = _readLux;
218 lux.sample = _updateLux;
219 _updateLux(&lux);
220
221 struct retro_log_callback log;
222 if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
223 logCallback = log.log;
224 } else {
225 logCallback = 0;
226 }
227 logger.log = GBARetroLog;
228 mLogSetDefaultLogger(&logger);
229
230 stream.videoDimensionsChanged = 0;
231 stream.postAudioFrame = 0;
232 stream.postAudioBuffer = _postAudioBuffer;
233 stream.postVideoFrame = 0;
234}
235
236void retro_deinit(void) {
237 free(outputBuffer);
238}
239
240void retro_run(void) {
241 uint16_t keys;
242 inputPollCallback();
243
244 bool updated = false;
245 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) {
246 struct retro_variable var = {
247 .key = "mgba_allow_opposing_directions",
248 .value = 0
249 };
250 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
251 ((struct GBA*) core->board)->allowOpposingDirections = strcmp(var.value, "yes") == 0;
252 }
253
254 var.key = "mgba_frameskip";
255 var.value = 0;
256 if (environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
257 mCoreConfigSetUIntValue(&core->config, "frameskip", strtol(var.value, NULL, 10));
258 mCoreLoadConfig(core);
259 }
260 }
261
262 keys = 0;
263 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
264 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
265 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
266 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
267 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
268 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
269 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
270 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
271 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
272 keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
273 core->setKeys(core, keys);
274
275 static bool wasAdjustingLux = false;
276 if (wasAdjustingLux) {
277 wasAdjustingLux = inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3) ||
278 inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3);
279 } else {
280 if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3)) {
281 ++luxLevel;
282 if (luxLevel > 10) {
283 luxLevel = 10;
284 }
285 wasAdjustingLux = true;
286 } else if (inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3)) {
287 --luxLevel;
288 if (luxLevel < 0) {
289 luxLevel = 0;
290 }
291 wasAdjustingLux = true;
292 }
293 }
294
295 core->runFrame(core);
296 unsigned width, height;
297 core->desiredVideoDimensions(core, &width, &height);
298 videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
299}
300
301void static _setupMaps(struct mCore* core) {
302#ifdef M_CORE_GBA
303 if (core->platform(core) == PLATFORM_GBA) {
304 struct GBA* gba = core->board;
305 struct retro_memory_descriptor descs[11];
306 struct retro_memory_map mmaps;
307 size_t romSize = gba->memory.romSize + (gba->memory.romSize & 1);
308
309 memset(descs, 0, sizeof(descs));
310 size_t savedataSize = retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
311
312 /* Map internal working RAM */
313 descs[0].ptr = gba->memory.iwram;
314 descs[0].start = BASE_WORKING_IRAM;
315 descs[0].len = SIZE_WORKING_IRAM;
316 descs[0].select = 0xFF000000;
317
318 /* Map working RAM */
319 descs[1].ptr = gba->memory.wram;
320 descs[1].start = BASE_WORKING_RAM;
321 descs[1].len = SIZE_WORKING_RAM;
322 descs[1].select = 0xFF000000;
323
324 /* Map save RAM */
325 /* TODO: if SRAM is flash, use start=0 addrspace="S" instead */
326 descs[2].ptr = savedataSize ? savedata : NULL;
327 descs[2].start = BASE_CART_SRAM;
328 descs[2].len = savedataSize;
329
330 /* Map ROM */
331 descs[3].ptr = gba->memory.rom;
332 descs[3].start = BASE_CART0;
333 descs[3].len = romSize;
334 descs[3].flags = RETRO_MEMDESC_CONST;
335
336 descs[4].ptr = gba->memory.rom;
337 descs[4].start = BASE_CART1;
338 descs[4].len = romSize;
339 descs[4].flags = RETRO_MEMDESC_CONST;
340
341 descs[5].ptr = gba->memory.rom;
342 descs[5].start = BASE_CART2;
343 descs[5].len = romSize;
344 descs[5].flags = RETRO_MEMDESC_CONST;
345
346 /* Map BIOS */
347 descs[6].ptr = gba->memory.bios;
348 descs[6].start = BASE_BIOS;
349 descs[6].len = SIZE_BIOS;
350 descs[6].flags = RETRO_MEMDESC_CONST;
351
352 /* Map VRAM */
353 descs[7].ptr = gba->video.vram;
354 descs[7].start = BASE_VRAM;
355 descs[7].len = SIZE_VRAM;
356 descs[7].select = 0xFF000000;
357
358 /* Map palette RAM */
359 descs[8].ptr = gba->video.palette;
360 descs[8].start = BASE_PALETTE_RAM;
361 descs[8].len = SIZE_PALETTE_RAM;
362 descs[8].select = 0xFF000000;
363
364 /* Map OAM */
365 descs[9].ptr = &gba->video.oam; /* video.oam is a structure */
366 descs[9].start = BASE_OAM;
367 descs[9].len = SIZE_OAM;
368 descs[9].select = 0xFF000000;
369
370 /* Map mmapped I/O */
371 descs[10].ptr = gba->memory.io;
372 descs[10].start = BASE_IO;
373 descs[10].len = SIZE_IO;
374
375 mmaps.descriptors = descs;
376 mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
377
378 bool yes = true;
379 environCallback(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
380 environCallback(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes);
381 }
382#endif
383}
384
385void retro_reset(void) {
386 core->reset(core);
387 _setupMaps(core);
388
389 if (rumbleCallback) {
390 CircleBufferClear(&rumbleHistory);
391 }
392}
393
394bool retro_load_game(const struct retro_game_info* game) {
395 struct VFile* rom;
396 if (game->data) {
397 data = anonymousMemoryMap(game->size);
398 dataSize = game->size;
399 memcpy(data, game->data, game->size);
400 rom = VFileFromMemory(data, game->size);
401 } else {
402 data = 0;
403 rom = VFileOpen(game->path, O_RDONLY);
404 }
405 if (!rom) {
406 return false;
407 }
408
409 core = mCoreFindVF(rom);
410 if (!core) {
411 rom->close(rom);
412 mappedMemoryFree(data, game->size);
413 return false;
414 }
415 mCoreInitConfig(core, NULL);
416 core->init(core);
417 core->setAVStream(core, &stream);
418
419 outputBuffer = malloc(256 * 224 * BYTES_PER_PIXEL);
420 core->setVideoBuffer(core, outputBuffer, 256);
421
422 core->setAudioBufferSize(core, SAMPLES);
423
424 blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
425 blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
426
427 core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
428
429 savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
430 struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
431
432 _reloadSettings();
433 core->loadROM(core, rom);
434 core->loadSave(core, save);
435
436#ifdef M_CORE_GBA
437 if (core->platform(core) == PLATFORM_GBA) {
438 core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
439
440 const char* sysDir = 0;
441 if (core->opts.useBios && environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir)) {
442 char biosPath[PATH_MAX];
443 snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, "gba_bios.bin");
444 struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
445 if (bios) {
446 core->loadBIOS(core, bios, 0);
447 }
448 }
449 }
450#endif
451
452 core->reset(core);
453 _setupMaps(core);
454
455 return true;
456}
457
458void retro_unload_game(void) {
459 if (!core) {
460 return;
461 }
462 core->deinit(core);
463 mappedMemoryFree(data, dataSize);
464 data = 0;
465 mappedMemoryFree(savedata, SIZE_CART_FLASH1M);
466 savedata = 0;
467 CircleBufferDeinit(&rumbleHistory);
468}
469
470size_t retro_serialize_size(void) {
471 return core->stateSize(core);
472}
473
474bool retro_serialize(void* data, size_t size) {
475 if (size != retro_serialize_size()) {
476 return false;
477 }
478 core->saveState(core, data);
479 return true;
480}
481
482bool retro_unserialize(const void* data, size_t size) {
483 if (size != retro_serialize_size()) {
484 return false;
485 }
486 core->loadState(core, data);
487 return true;
488}
489
490void retro_cheat_reset(void) {
491 mCheatDeviceClear(core->cheatDevice(core));
492}
493
494void retro_cheat_set(unsigned index, bool enabled, const char* code) {
495 UNUSED(index);
496 UNUSED(enabled);
497 struct mCheatDevice* device = core->cheatDevice(core);
498 struct mCheatSet* cheatSet = NULL;
499 if (mCheatSetsSize(&device->cheats)) {
500 cheatSet = *mCheatSetsGetPointer(&device->cheats, 0);
501 } else {
502 cheatSet = device->createSet(device, NULL);
503 mCheatAddSet(device, cheatSet);
504 }
505 // Convert the super wonky unportable libretro format to something normal
506 char realCode[] = "XXXXXXXX XXXXXXXX";
507 size_t len = strlen(code) + 1; // Include null terminator
508 size_t i, pos;
509 for (i = 0, pos = 0; i < len; ++i) {
510 if (isspace((int) code[i]) || code[i] == '+') {
511 realCode[pos] = ' ';
512 } else {
513 realCode[pos] = code[i];
514 }
515 if ((pos == 13 && (realCode[pos] == ' ' || !realCode[pos])) || pos == 17) {
516 realCode[pos] = '\0';
517 mCheatAddLine(cheatSet, realCode, 0);
518 pos = 0;
519 continue;
520 }
521 ++pos;
522 }
523}
524
525unsigned retro_get_region(void) {
526 return RETRO_REGION_NTSC; // TODO: This isn't strictly true
527}
528
529void retro_set_controller_port_device(unsigned port, unsigned device) {
530 UNUSED(port);
531 UNUSED(device);
532}
533
534bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
535 UNUSED(game_type);
536 UNUSED(info);
537 UNUSED(num_info);
538 return false;
539}
540
541void* retro_get_memory_data(unsigned id) {
542 if (id != RETRO_MEMORY_SAVE_RAM) {
543 return 0;
544 }
545 return savedata;
546}
547
548size_t retro_get_memory_size(unsigned id) {
549 if (id != RETRO_MEMORY_SAVE_RAM) {
550 return 0;
551 }
552#ifdef M_CORE_GBA
553 if (core->platform(core) == PLATFORM_GBA) {
554 switch (((struct GBA*) core->board)->memory.savedata.type) {
555 case SAVEDATA_AUTODETECT:
556 return SIZE_CART_FLASH1M;
557 default:
558 return GBASavedataSize(&((struct GBA*) core->board)->memory.savedata);
559 }
560 }
561#endif
562#ifdef M_CORE_GB
563 if (core->platform(core) == PLATFORM_GB) {
564 return ((struct GB*) core->board)->sramSize;
565 }
566#endif
567 return 0;
568}
569
570void GBARetroLog(struct mLogger* logger, int category, enum mLogLevel level, const char* format, va_list args) {
571 UNUSED(logger);
572 if (!logCallback) {
573 return;
574 }
575
576 char message[128];
577 vsnprintf(message, sizeof(message), format, args);
578
579 enum retro_log_level retroLevel = RETRO_LOG_INFO;
580 switch (level) {
581 case mLOG_ERROR:
582 case mLOG_FATAL:
583 retroLevel = RETRO_LOG_ERROR;
584 break;
585 case mLOG_WARN:
586 retroLevel = RETRO_LOG_WARN;
587 break;
588 case mLOG_INFO:
589 retroLevel = RETRO_LOG_INFO;
590 break;
591 case mLOG_GAME_ERROR:
592 case mLOG_STUB:
593#ifdef NDEBUG
594 return;
595#else
596 retroLevel = RETRO_LOG_DEBUG;
597 break;
598#endif
599 case mLOG_DEBUG:
600 retroLevel = RETRO_LOG_DEBUG;
601 break;
602 }
603#ifdef NDEBUG
604 static int biosCat = -1;
605 if (biosCat < 0) {
606 biosCat = mLogCategoryById("gba.bios");
607 }
608
609 if (category == biosCat) {
610 return;
611 }
612#endif
613 logCallback(retroLevel, "%s: %s\n", mLogCategoryName(category), message);
614}
615
616static void _postAudioBuffer(struct mAVStream* stream, blip_t* left, blip_t* right) {
617 UNUSED(stream);
618 int16_t samples[SAMPLES * 2];
619 blip_read_samples(left, samples, SAMPLES, true);
620 blip_read_samples(right, samples + 1, SAMPLES, true);
621 audioCallback(samples, SAMPLES);
622}
623
624static void _setRumble(struct mRumble* rumble, int enable) {
625 UNUSED(rumble);
626 if (!rumbleCallback) {
627 return;
628 }
629 rumbleLevel += enable;
630 if (CircleBufferSize(&rumbleHistory) == RUMBLE_PWM) {
631 int8_t oldLevel;
632 CircleBufferRead8(&rumbleHistory, &oldLevel);
633 rumbleLevel -= oldLevel;
634 }
635 CircleBufferWrite8(&rumbleHistory, enable);
636 rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleLevel * 0xFFFF / RUMBLE_PWM);
637 rumbleCallback(0, RETRO_RUMBLE_WEAK, rumbleLevel * 0xFFFF / RUMBLE_PWM);
638}
639
640static void _updateLux(struct GBALuminanceSource* lux) {
641 UNUSED(lux);
642 struct retro_variable var = {
643 .key = "mgba_solar_sensor_level",
644 .value = 0
645 };
646
647 bool updated = false;
648 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) || !updated) {
649 return;
650 }
651 if (!environCallback(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || !var.value) {
652 return;
653 }
654
655 char* end;
656 int newLuxLevel = strtol(var.value, &end, 10);
657 if (!*end) {
658 if (newLuxLevel > 10) {
659 luxLevel = 10;
660 } else if (newLuxLevel < 0) {
661 luxLevel = 0;
662 } else {
663 luxLevel = newLuxLevel;
664 }
665 }
666}
667
668static uint8_t _readLux(struct GBALuminanceSource* lux) {
669 UNUSED(lux);
670 int value = 0x16;
671 if (luxLevel > 0) {
672 value += GBA_LUX_LEVELS[luxLevel - 1];
673 }
674 return 0xFF - value;
675}