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 "core/log.h"
 10#include "gba/gba.h"
 11#include "gba/context/overrides.h"
 12#include "gba/renderers/video-software.h"
 13#include "gba/serialize.h"
 14#include "util/memory.h"
 15#include "util/patch.h"
 16#include "util/vfs.h"
 17
 18struct GBACore {
 19	struct mCore d;
 20	struct GBAVideoSoftwareRenderer renderer;
 21	int keys;
 22	struct mCPUComponent* components[GBA_COMPONENT_MAX];
 23	const struct Configuration* overrides;
 24};
 25
 26static bool _GBACoreInit(struct mCore* core) {
 27	struct GBACore* gbacore = (struct GBACore*) core;
 28
 29	struct ARMCore* cpu = anonymousMemoryMap(sizeof(struct ARMCore));
 30	struct GBA* gba = anonymousMemoryMap(sizeof(struct GBA));
 31	if (!cpu || !gba) {
 32		free(cpu);
 33		free(gba);
 34		return false;
 35	}
 36	core->cpu = cpu;
 37	core->board = gba;
 38	gbacore->overrides = 0;
 39
 40	GBACreate(gba);
 41	// TODO: Restore debugger and cheats
 42	memset(gbacore->components, 0, sizeof(gbacore->components));
 43	ARMSetComponents(cpu, &gba->d, GBA_COMPONENT_MAX, gbacore->components);
 44	ARMInit(cpu);
 45
 46	GBAVideoSoftwareRendererCreate(&gbacore->renderer);
 47
 48	gbacore->keys = 0;
 49	gba->keySource = &gbacore->keys;
 50
 51#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 52	mDirectorySetInit(&core->dirs);
 53#endif
 54	
 55	return true;
 56}
 57
 58static void _GBACoreDeinit(struct mCore* core) {
 59	ARMDeinit(core->cpu);
 60	GBADestroy(core->board);
 61	mappedMemoryFree(core->cpu, sizeof(struct ARMCore));
 62	mappedMemoryFree(core->board, sizeof(struct GBA));
 63#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 64	mDirectorySetDeinit(&core->dirs);
 65#endif
 66}
 67
 68static enum mPlatform _GBACorePlatform(struct mCore* core) {
 69	UNUSED(core);
 70	return PLATFORM_GBA;
 71}
 72
 73static void _GBACoreSetSync(struct mCore* core, struct mCoreSync* sync) {
 74	struct GBA* gba = core->board;
 75	gba->sync = sync;
 76}
 77
 78static void _GBACoreLoadConfig(struct mCore* core, const struct mCoreConfig* config) {
 79	struct GBA* gba = core->board;
 80	gba->audio.masterVolume = core->opts.volume;
 81	gba->video.frameskip = core->opts.frameskip;
 82
 83#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 84	struct GBACore* gbacore = (struct GBACore*) core;
 85	gbacore->overrides = mCoreConfigGetOverridesConst(config);
 86
 87	struct VFile* bios = 0;
 88	if (core->opts.useBios) {
 89		bios = VFileOpen(core->opts.bios, O_RDONLY);
 90	}
 91	if (bios) {
 92		GBALoadBIOS(gba, bios);
 93	}
 94#endif
 95
 96	const char* idleOptimization = mCoreConfigGetValue(config, "idleOptimization");
 97	if (idleOptimization) {
 98		if (strcasecmp(idleOptimization, "ignore") == 0) {
 99			gba->idleOptimization = IDLE_LOOP_IGNORE;
100		} else if (strcasecmp(idleOptimization, "remove") == 0) {
101			gba->idleOptimization = IDLE_LOOP_REMOVE;
102		} else if (strcasecmp(idleOptimization, "detect") == 0) {
103			gba->idleOptimization = IDLE_LOOP_DETECT;
104		}
105	}
106}
107
108static void _GBACoreDesiredVideoDimensions(struct mCore* core, unsigned* width, unsigned* height) {
109	UNUSED(core);
110	*width = VIDEO_HORIZONTAL_PIXELS;
111	*height = VIDEO_VERTICAL_PIXELS;
112}
113
114static void _GBACoreSetVideoBuffer(struct mCore* core, color_t* buffer, size_t stride) {
115	struct GBACore* gbacore = (struct GBACore*) core;
116	gbacore->renderer.outputBuffer = buffer;
117	gbacore->renderer.outputBufferStride = stride;
118}
119
120static void _GBACoreGetVideoBuffer(struct mCore* core, color_t** buffer, size_t* stride) {
121	struct GBACore* gbacore = (struct GBACore*) core;
122	*buffer = gbacore->renderer.outputBuffer;
123	*stride = gbacore->renderer.outputBufferStride;
124}
125
126static struct blip_t* _GBACoreGetAudioChannel(struct mCore* core, int ch) {
127	struct GBA* gba = core->board;
128	switch (ch) {
129	case 0:
130		return gba->audio.psg.left;
131	case 1:
132		return gba->audio.psg.right;
133	default:
134		return NULL;
135	}
136}
137
138static void _GBACoreSetAudioBufferSize(struct mCore* core, size_t samples) {
139	struct GBA* gba = core->board;
140	GBAAudioResizeBuffer(&gba->audio, samples);
141}
142
143static size_t _GBACoreGetAudioBufferSize(struct mCore* core) {
144	struct GBA* gba = core->board;
145	return gba->audio.samples;
146}
147
148static void _GBACoreSetAVStream(struct mCore* core, struct mAVStream* stream) {
149	struct GBA* gba = core->board;
150	gba->stream = stream;
151}
152
153static bool _GBACoreLoadROM(struct mCore* core, struct VFile* vf) {
154	return GBALoadROM2(core->board, vf);
155}
156
157static bool _GBACoreLoadBIOS(struct mCore* core, struct VFile* vf, int type) {
158	UNUSED(type);
159	if (!GBAIsBIOS(vf)) {
160		return false;
161	}
162	GBALoadBIOS(core->board, vf);
163	return true;
164}
165
166static bool _GBACoreLoadSave(struct mCore* core, struct VFile* vf) {
167	return GBALoadSave(core->board, vf);
168}
169
170static bool _GBACoreLoadPatch(struct mCore* core, struct VFile* vf) {
171	if (!vf) {
172		return false;
173	}
174	struct Patch patch;
175	if (!loadPatch(vf, &patch)) {
176		return false;
177	}
178	GBAApplyPatch(core->board, &patch);
179	return true;
180}
181
182static void _GBACoreUnloadROM(struct mCore* core) {
183	return GBAUnloadROM(core->board);
184}
185
186static void _GBACoreReset(struct mCore* core) {
187	struct GBACore* gbacore = (struct GBACore*) core;
188	struct GBA* gba = (struct GBA*) core->board;
189	if (gbacore->renderer.outputBuffer) {
190		GBAVideoAssociateRenderer(&gba->video, &gbacore->renderer.d);
191	}
192	ARMReset(core->cpu);
193	if (core->opts.skipBios) {
194		GBASkipBIOS(core->board);
195	}
196
197	struct GBACartridgeOverride override;
198	const struct GBACartridge* cart = (const struct GBACartridge*) gba->memory.rom;
199	memcpy(override.id, &cart->id, sizeof(override.id));
200	if (GBAOverrideFind(gbacore->overrides, &override)) {
201		GBAOverrideApply(gba, &override);
202	}
203}
204
205static void _GBACoreRunFrame(struct mCore* core) {
206	struct GBA* gba = core->board;
207	int32_t frameCounter = gba->video.frameCounter;
208	while (gba->video.frameCounter == frameCounter) {
209		ARMRunLoop(core->cpu);
210	}
211}
212
213static void _GBACoreRunLoop(struct mCore* core) {
214	ARMRunLoop(core->cpu);
215}
216
217static void _GBACoreStep(struct mCore* core) {
218	ARMRun(core->cpu);
219}
220
221static bool _GBACoreLoadState(struct mCore* core, struct VFile* vf, int flags) {
222	return GBALoadStateNamed(core->board, vf, flags);
223}
224
225static bool _GBACoreSaveState(struct mCore* core, struct VFile* vf, int flags) {
226	return GBASaveStateNamed(core->board, vf, flags);
227}
228
229static void _GBACoreSetKeys(struct mCore* core, uint32_t keys) {
230	struct GBACore* gbacore = (struct GBACore*) core;
231	gbacore->keys = keys;
232}
233
234static void _GBACoreAddKeys(struct mCore* core, uint32_t keys) {
235	struct GBACore* gbacore = (struct GBACore*) core;
236	gbacore->keys |= keys;
237}
238
239static void _GBACoreClearKeys(struct mCore* core, uint32_t keys) {
240	struct GBACore* gbacore = (struct GBACore*) core;
241	gbacore->keys &= ~keys;
242}
243
244static int32_t _GBACoreFrameCounter(struct mCore* core) {
245	struct GBA* gba = core->board;
246	return gba->video.frameCounter;
247}
248
249static int32_t _GBACoreFrameCycles(struct mCore* core) {
250	UNUSED(core);
251	return VIDEO_TOTAL_LENGTH;
252}
253
254static int32_t _GBACoreFrequency(struct mCore* core) {
255	UNUSED(core);
256	return GBA_ARM7TDMI_FREQUENCY;
257}
258
259static void _GBACoreGetGameTitle(struct mCore* core, char* title) {
260	GBAGetGameTitle(core->board, title);
261}
262
263static void _GBACoreSetRTC(struct mCore* core, struct mRTCSource* rtc) {
264	struct GBA* gba = core->board;
265	gba->rtcSource = rtc;
266}
267
268struct mCore* GBACoreCreate(void) {
269	struct GBACore* gbacore = malloc(sizeof(*gbacore));
270	struct mCore* core = &gbacore->d;
271	memset(&core->opts, 0, sizeof(core->opts));
272	core->cpu = 0;
273	core->board = 0;
274	core->init = _GBACoreInit;
275	core->deinit = _GBACoreDeinit;
276	core->platform = _GBACorePlatform;
277	core->setSync = _GBACoreSetSync;
278	core->loadConfig = _GBACoreLoadConfig;
279	core->desiredVideoDimensions = _GBACoreDesiredVideoDimensions;
280	core->setVideoBuffer = _GBACoreSetVideoBuffer;
281	core->getVideoBuffer = _GBACoreGetVideoBuffer;
282	core->getAudioChannel = _GBACoreGetAudioChannel;
283	core->setAudioBufferSize = _GBACoreSetAudioBufferSize;
284	core->getAudioBufferSize = _GBACoreGetAudioBufferSize;
285	core->setAVStream = _GBACoreSetAVStream;
286	core->isROM = GBAIsROM;
287	core->loadROM = _GBACoreLoadROM;
288	core->loadBIOS = _GBACoreLoadBIOS;
289	core->loadSave = _GBACoreLoadSave;
290	core->loadPatch = _GBACoreLoadPatch;
291	core->unloadROM = _GBACoreUnloadROM;
292	core->reset = _GBACoreReset;
293	core->runFrame = _GBACoreRunFrame;
294	core->runLoop = _GBACoreRunLoop;
295	core->step = _GBACoreStep;
296	core->loadState = _GBACoreLoadState;
297	core->saveState = _GBACoreSaveState;
298	core->setKeys = _GBACoreSetKeys;
299	core->addKeys = _GBACoreAddKeys;
300	core->clearKeys = _GBACoreClearKeys;
301	core->frameCounter = _GBACoreFrameCounter;
302	core->frameCycles = _GBACoreFrameCycles;
303	core->frequency = _GBACoreFrequency;
304	core->getGameTitle = _GBACoreGetGameTitle;
305	core->setRTC = _GBACoreSetRTC;
306	return core;
307}