1/* Copyright (c) 2013-2016 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 "core.h"
  7
  8#include "core/core.h"
  9#include "gb/gb.h"
 10#include "gb/renderers/software.h"
 11#include "util/memory.h"
 12#include "util/patch.h"
 13
 14struct GBCore {
 15	struct mCore d;
 16	struct GBVideoSoftwareRenderer renderer;
 17	uint8_t keys;
 18};
 19
 20static bool _GBCoreInit(struct mCore* core) {
 21	struct GBCore* gbcore = (struct GBCore*) core;
 22
 23	struct LR35902Core* cpu = anonymousMemoryMap(sizeof(struct LR35902Core));
 24	struct GB* gb = anonymousMemoryMap(sizeof(struct GB));
 25	if (!cpu || !gb) {
 26		free(cpu);
 27		free(gb);
 28		return false;
 29	}
 30	core->cpu = cpu;
 31	core->board = gb;
 32
 33	GBCreate(gb);
 34	LR35902SetComponents(cpu, &gb->d, 0, 0);
 35	LR35902Init(cpu);
 36
 37	GBVideoSoftwareRendererCreate(&gbcore->renderer);
 38
 39	gbcore->keys = 0;
 40	gb->keySource = &gbcore->keys;
 41
 42#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 43	mDirectorySetInit(&core->dirs);
 44#endif
 45	
 46	return true;
 47}
 48
 49static void _GBCoreDeinit(struct mCore* core) {
 50	LR35902Deinit(core->cpu);
 51	GBDestroy(core->board);
 52	mappedMemoryFree(core->cpu, sizeof(struct LR35902Core));
 53	mappedMemoryFree(core->board, sizeof(struct GB));
 54#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 55	mDirectorySetDeinit(&core->dirs);
 56#endif
 57}
 58
 59static enum mPlatform _GBCorePlatform(struct mCore* core) {
 60	UNUSED(core);
 61	return PLATFORM_GB;
 62}
 63
 64static void _GBCoreSetSync(struct mCore* core, struct mCoreSync* sync) {
 65	struct GB* gb = core->board;
 66	gb->sync = sync;
 67}
 68
 69static void _GBCoreLoadConfig(struct mCore* core, const struct mCoreConfig* config) {
 70	UNUSED(config);
 71
 72	struct GB* gb = core->board;
 73	if (core->opts.mute) {
 74		gb->audio.masterVolume = 0;
 75	} else {
 76		gb->audio.masterVolume = core->opts.volume;
 77	}
 78	gb->video.frameskip = core->opts.frameskip;
 79}
 80
 81static void _GBCoreDesiredVideoDimensions(struct mCore* core, unsigned* width, unsigned* height) {
 82	UNUSED(core);
 83	*width = GB_VIDEO_HORIZONTAL_PIXELS;
 84	*height = GB_VIDEO_VERTICAL_PIXELS;
 85}
 86
 87static void _GBCoreSetVideoBuffer(struct mCore* core, color_t* buffer, size_t stride) {
 88	struct GBCore* gbcore = (struct GBCore*) core;
 89	gbcore->renderer.outputBuffer = buffer;
 90	gbcore->renderer.outputBufferStride = stride;
 91}
 92
 93static void _GBCoreGetVideoBuffer(struct mCore* core, color_t** buffer, size_t* stride) {
 94	struct GBCore* gbcore = (struct GBCore*) core;
 95	*buffer = gbcore->renderer.outputBuffer;
 96	*stride = gbcore->renderer.outputBufferStride;
 97}
 98
 99static struct blip_t* _GBCoreGetAudioChannel(struct mCore* core, int ch) {
100	struct GB* gb = core->board;
101	switch (ch) {
102	case 0:
103		return gb->audio.left;
104	case 1:
105		return gb->audio.right;
106	default:
107		return NULL;
108	}
109}
110
111static void _GBCoreSetAudioBufferSize(struct mCore* core, size_t samples) {
112	struct GB* gb = core->board;
113	GBAudioResizeBuffer(&gb->audio, samples);
114}
115
116static size_t _GBCoreGetAudioBufferSize(struct mCore* core) {
117	struct GB* gb = core->board;
118	return gb->audio.samples;
119}
120
121static void _GBCoreSetAVStream(struct mCore* core, struct mAVStream* stream) {
122	struct GB* gb = core->board;
123	gb->stream = stream;
124	if (stream && stream->videoDimensionsChanged) {
125		stream->videoDimensionsChanged(stream, GB_VIDEO_HORIZONTAL_PIXELS, GB_VIDEO_VERTICAL_PIXELS);
126	}
127}
128
129static bool _GBCoreLoadROM(struct mCore* core, struct VFile* vf) {
130	return GBLoadROM(core->board, vf);
131}
132
133static bool _GBCoreLoadBIOS(struct mCore* core, struct VFile* vf, int type) {
134	UNUSED(core);
135	UNUSED(vf);
136	UNUSED(type);
137	// TODO
138	return false;
139}
140
141static bool _GBCoreLoadSave(struct mCore* core, struct VFile* vf) {
142	return GBLoadSave(core->board, vf);
143}
144
145static bool _GBCoreLoadPatch(struct mCore* core, struct VFile* vf) {
146	if (!vf) {
147		return false;
148	}
149	struct Patch patch;
150	if (!loadPatch(vf, &patch)) {
151		return false;
152	}
153	GBApplyPatch(core->board, &patch);
154	return true;
155}
156
157static void _GBCoreUnloadROM(struct mCore* core) {
158	return GBUnloadROM(core->board);
159}
160
161static void _GBCoreReset(struct mCore* core) {
162	struct GBCore* gbcore = (struct GBCore*) core;
163	struct GB* gb = (struct GB*) core->board;
164	if (gbcore->renderer.outputBuffer) {
165		GBVideoAssociateRenderer(&gb->video, &gbcore->renderer.d);
166	}
167	LR35902Reset(core->cpu);
168}
169
170static void _GBCoreRunFrame(struct mCore* core) {
171	struct GB* gb = core->board;
172	int32_t frameCounter = gb->video.frameCounter;
173	while (gb->video.frameCounter == frameCounter) {
174		LR35902Run(core->cpu);
175	}
176}
177
178static void _GBCoreRunLoop(struct mCore* core) {
179	LR35902Run(core->cpu);
180}
181
182static void _GBCoreStep(struct mCore* core) {
183	LR35902Tick(core->cpu);
184}
185
186static bool _GBCoreLoadState(struct mCore* core, struct VFile* vf, int flags) {
187	UNUSED(core);
188	UNUSED(vf);
189	UNUSED(flags);
190	// TODO
191	return false;
192}
193
194static bool _GBCoreSaveState(struct mCore* core, struct VFile* vf, int flags) {
195	UNUSED(core);
196	UNUSED(vf);
197	UNUSED(flags);
198	// TODO
199	return false;
200}
201
202static void _GBCoreSetKeys(struct mCore* core, uint32_t keys) {
203	struct GBCore* gbcore = (struct GBCore*) core;
204	gbcore->keys = keys;
205}
206
207static void _GBCoreAddKeys(struct mCore* core, uint32_t keys) {
208	struct GBCore* gbcore = (struct GBCore*) core;
209	gbcore->keys |= keys;
210}
211
212static void _GBCoreClearKeys(struct mCore* core, uint32_t keys) {
213	struct GBCore* gbcore = (struct GBCore*) core;
214	gbcore->keys &= ~keys;
215}
216
217static int32_t _GBCoreFrameCounter(struct mCore* core) {
218	struct GB* gb = core->board;
219	return gb->video.frameCounter;
220}
221
222static int32_t _GBCoreFrameCycles(struct mCore* core) {
223	UNUSED(core);
224	return GB_VIDEO_TOTAL_LENGTH;
225}
226
227static int32_t _GBCoreFrequency(struct mCore* core) {
228	UNUSED(core);
229	// TODO: GB differences
230	return DMG_LR35902_FREQUENCY;
231}
232
233static void _GBCoreGetGameTitle(struct mCore* core, char* title) {
234	GBGetGameTitle(core->board, title);
235}
236
237static void _GBCoreGetGameCode(struct mCore* core, char* title) {
238	GBGetGameCode(core->board, title);
239}
240
241static void _GBCoreSetRTC(struct mCore* core, struct mRTCSource* rtc) {
242	struct GB* gb = core->board;
243	gb->memory.rtc = rtc;
244}
245
246static void _GBCoreSetRotation(struct mCore* core, struct mRotationSource* rotation) {
247	struct GB* gb = core->board;
248	gb->memory.rotation = rotation;
249}
250
251static void _GBCoreSetRumble(struct mCore* core, struct mRumble* rumble) {
252	struct GB* gb = core->board;
253	gb->memory.rumble = rumble;
254}
255
256struct mCore* GBCoreCreate(void) {
257	struct GBCore* gbcore = malloc(sizeof(*gbcore));
258	struct mCore* core = &gbcore->d;
259	memset(&core->opts, 0, sizeof(core->opts));
260	core->cpu = 0;
261	core->board = 0;
262	core->init = _GBCoreInit;
263	core->deinit = _GBCoreDeinit;
264	core->platform = _GBCorePlatform;
265	core->setSync = _GBCoreSetSync;
266	core->loadConfig = _GBCoreLoadConfig;
267	core->desiredVideoDimensions = _GBCoreDesiredVideoDimensions;
268	core->setVideoBuffer = _GBCoreSetVideoBuffer;
269	core->getVideoBuffer = _GBCoreGetVideoBuffer;
270	core->getAudioChannel = _GBCoreGetAudioChannel;
271	core->setAudioBufferSize = _GBCoreSetAudioBufferSize;
272	core->getAudioBufferSize = _GBCoreGetAudioBufferSize;
273	core->setAVStream = _GBCoreSetAVStream;
274	core->isROM = GBIsROM;
275	core->loadROM = _GBCoreLoadROM;
276	core->loadBIOS = _GBCoreLoadBIOS;
277	core->loadSave = _GBCoreLoadSave;
278	core->loadPatch = _GBCoreLoadPatch;
279	core->unloadROM = _GBCoreUnloadROM;
280	core->reset = _GBCoreReset;
281	core->runFrame = _GBCoreRunFrame;
282	core->runLoop = _GBCoreRunLoop;
283	core->step = _GBCoreStep;
284	core->loadState = _GBCoreLoadState;
285	core->saveState = _GBCoreSaveState;
286	core->setKeys = _GBCoreSetKeys;
287	core->addKeys = _GBCoreAddKeys;
288	core->clearKeys = _GBCoreClearKeys;
289	core->frameCounter = _GBCoreFrameCounter;
290	core->frameCycles = _GBCoreFrameCycles;
291	core->frequency = _GBCoreFrequency;
292	core->getGameTitle = _GBCoreGetGameTitle;
293	core->getGameCode = _GBCoreGetGameCode;
294	core->setRTC = _GBCoreSetRTC;
295	core->setRotation = _GBCoreSetRotation;
296	core->setRumble = _GBCoreSetRumble;
297	return core;
298}