src/platform/3ds/main.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
7#include "gba/renderers/video-software.h"
8#include "gba/context/context.h"
9#include "gba/gui/gui-runner.h"
10#include "gba/video.h"
11#include "util/gui.h"
12#include "util/gui/file-select.h"
13#include "util/gui/font.h"
14#include "util/memory.h"
15
16#include "3ds-vfs.h"
17
18#include <3ds.h>
19#include <sf2d.h>
20
21#define AUDIO_SAMPLES 0x800
22
23FS_archive sdmcArchive;
24
25static struct GBA3DSRotationSource {
26 struct GBARotationSource d;
27 accelVector accel;
28 angularRate gyro;
29} rotation;
30
31static struct VFile* logFile;
32static bool hasSound;
33// TODO: Move into context
34static struct GBAVideoSoftwareRenderer renderer;
35static struct GBAAVStream stream;
36static int16_t* audioLeft = 0;
37static int16_t* audioRight = 0;
38static sf2d_texture* tex;
39
40extern bool allocateRomBuffer(void);
41static void GBA3DSLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args);
42
43static void _postAudioBuffer(struct GBAAVStream* stream, struct GBAAudio* audio);
44
45static void _drawStart(void) {
46 sf2d_start_frame(GFX_BOTTOM, GFX_LEFT);
47}
48
49static void _drawEnd(void) {
50 sf2d_end_frame();
51 sf2d_swapbuffers();
52}
53
54static void _setup(struct GBAGUIRunner* runner) {
55 struct GBAOptions opts = {
56 .useBios = true,
57 .logLevel = 0,
58 .idleOptimization = IDLE_LOOP_DETECT
59 };
60 GBAConfigLoadDefaults(&runner->context.config, &opts);
61 runner->context.gba->logHandler = GBA3DSLog;
62 runner->context.gba->rotationSource = &rotation.d;
63 if (hasSound) {
64 runner->context.gba->stream = &stream;
65 }
66
67 GBAVideoSoftwareRendererCreate(&renderer);
68 renderer.outputBuffer = linearAlloc(256 * VIDEO_VERTICAL_PIXELS * 2);
69 renderer.outputBufferStride = 256;
70 runner->context.renderer = &renderer.d;
71
72 GBAAudioResizeBuffer(&runner->context.gba->audio, AUDIO_SAMPLES);
73}
74
75static void _gameLoaded(struct GBAGUIRunner* runner) {
76 if (runner->context.gba->memory.hw.devices & HW_TILT) {
77 HIDUSER_EnableAccelerometer();
78 }
79 if (runner->context.gba->memory.hw.devices & HW_GYRO) {
80 HIDUSER_EnableGyroscope();
81 }
82
83#if RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
84 double ratio = GBAAudioCalculateRatio(1, 60, 1);
85 blip_set_rates(runner->context.gba->audio.left, GBA_ARM7TDMI_FREQUENCY, 0x8000 * ratio);
86 blip_set_rates(runner->context.gba->audio.right, GBA_ARM7TDMI_FREQUENCY, 0x8000 * ratio);
87#endif
88 if (hasSound) {
89 memset(audioLeft, 0, AUDIO_SAMPLES * sizeof(int16_t));
90 memset(audioRight, 0, AUDIO_SAMPLES * sizeof(int16_t));
91 }
92}
93
94static void _gameUnloaded(struct GBAGUIRunner* runner) {
95 if (hasSound) {
96 CSND_SetPlayState(8, 0);
97 CSND_SetPlayState(9, 0);
98 csndExecCmds(false);
99 }
100
101 if (runner->context.gba->memory.hw.devices & HW_TILT) {
102 HIDUSER_DisableAccelerometer();
103 }
104 if (runner->context.gba->memory.hw.devices & HW_GYRO) {
105 HIDUSER_DisableGyroscope();
106 }
107}
108
109static void _drawFrame(struct GBAGUIRunner* runner, bool faded) {
110 GX_SetDisplayTransfer(0, renderer.outputBuffer, GX_BUFFER_DIM(256, VIDEO_VERTICAL_PIXELS), tex->data, GX_BUFFER_DIM(256, VIDEO_VERTICAL_PIXELS), 0x000002202);
111 GSPGPU_FlushDataCache(0, tex->data, 256 * VIDEO_VERTICAL_PIXELS * 2);
112#if RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
113 if (!hasSound) {
114 blip_clear(runner->context.gba->audio.left);
115 blip_clear(runner->context.gba->audio.right);
116 }
117#endif
118 gspWaitForPPF();
119 sf2d_draw_texture_scale_blend(tex, 40, 296, 1, -1, 0xFFFFFF3F | (faded ? 0 : 0xC0));
120}
121
122static uint16_t _pollGameInput(struct GBAGUIRunner* runner) {
123 hidScanInput();
124 uint32_t activeKeys = hidKeysHeld() & 0xF00003FF;
125 activeKeys |= activeKeys >> 24;
126 return activeKeys;
127}
128
129static int _pollInput(void) {
130 hidScanInput();
131 int keys = 0;
132 int activeKeys = hidKeysHeld();
133 if (activeKeys & KEY_X) {
134 keys |= 1 << GUI_INPUT_CANCEL;
135 }
136 if (activeKeys & KEY_B) {
137 keys |= 1 << GUI_INPUT_BACK;
138 }
139 if (activeKeys & KEY_A) {
140 keys |= 1 << GUI_INPUT_SELECT;
141 }
142 if (activeKeys & KEY_LEFT) {
143 keys |= 1 << GUI_INPUT_LEFT;
144 }
145 if (activeKeys & KEY_RIGHT) {
146 keys |= 1 << GUI_INPUT_RIGHT;
147 }
148 if (activeKeys & KEY_UP) {
149 keys |= 1 << GUI_INPUT_UP;
150 }
151 if (activeKeys & KEY_DOWN) {
152 keys |= 1 << GUI_INPUT_DOWN;
153 }
154 return keys;
155}
156
157static void _sampleRotation(struct GBARotationSource* source) {
158 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
159 // Work around ctrulib getting the entries wrong
160 rotation->accel = *(accelVector*)& hidSharedMem[0x48];
161 rotation->gyro = *(angularRate*)& hidSharedMem[0x5C];
162}
163
164static int32_t _readTiltX(struct GBARotationSource* source) {
165 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
166 return rotation->accel.x << 18L;
167}
168
169static int32_t _readTiltY(struct GBARotationSource* source) {
170 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
171 return rotation->accel.y << 18L;
172}
173
174static int32_t _readGyroZ(struct GBARotationSource* source) {
175 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
176 return rotation->gyro.y << 18L; // Yes, y
177}
178
179static void _postAudioBuffer(struct GBAAVStream* stream, struct GBAAudio* audio) {
180 UNUSED(stream);
181 memset(audioLeft, 0, AUDIO_SAMPLES * sizeof(int16_t));
182 memset(audioRight, 0, AUDIO_SAMPLES * sizeof(int16_t));
183#if RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
184 blip_read_samples(audio->left, audioLeft, AUDIO_SAMPLES, false);
185 blip_read_samples(audio->right, audioRight, AUDIO_SAMPLES, false);
186#elif RESAMPLE_LIBRARY == RESAMPLE_NN
187 GBAAudioCopy(audio, audioLeft, audioRight, AUDIO_SAMPLES);
188#endif
189 GSPGPU_FlushDataCache(0, (void*) audioLeft, AUDIO_SAMPLES * sizeof(int16_t));
190 GSPGPU_FlushDataCache(0, (void*) audioRight, AUDIO_SAMPLES * sizeof(int16_t));
191 csndPlaySound(0x8, SOUND_ONE_SHOT | SOUND_FORMAT_16BIT, 0x8000, 1.0, -1.0, audioLeft, audioLeft, AUDIO_SAMPLES * sizeof(int16_t));
192 csndPlaySound(0x9, SOUND_ONE_SHOT | SOUND_FORMAT_16BIT, 0x8000, 1.0, 1.0, audioRight, audioRight, AUDIO_SAMPLES * sizeof(int16_t));
193 CSND_SetPlayState(0x8, 1);
194 CSND_SetPlayState(0x9, 1);
195 csndExecCmds(false);
196}
197
198int main() {
199 hasSound = !csndInit();
200
201 rotation.d.sample = _sampleRotation;
202 rotation.d.readTiltX = _readTiltX;
203 rotation.d.readTiltY = _readTiltY;
204 rotation.d.readGyroZ = _readGyroZ;
205
206 stream.postVideoFrame = 0;
207 stream.postAudioFrame = 0;
208 stream.postAudioBuffer = _postAudioBuffer;
209
210 if (!allocateRomBuffer()) {
211 return 1;
212 }
213
214 if (hasSound) {
215 audioLeft = linearAlloc(AUDIO_SAMPLES * sizeof(int16_t));
216 audioRight = linearAlloc(AUDIO_SAMPLES * sizeof(int16_t));
217 }
218
219 sf2d_init();
220 sf2d_set_clear_color(0);
221 tex = sf2d_create_texture(256, 256, TEXFMT_RGB565, SF2D_PLACE_RAM);
222 memset(tex->data, 0, 256 * 256 * 2);
223
224 sdmcArchive = (FS_archive) {
225 ARCH_SDMC,
226 (FS_path) { PATH_EMPTY, 1, (const u8*)"" },
227 0, 0
228 };
229 FSUSER_OpenArchive(0, &sdmcArchive);
230
231 logFile = VFileOpen("/mgba.log", O_WRONLY | O_CREAT | O_TRUNC);
232 struct GUIFont* font = GUIFontCreate();
233
234 if (!font) {
235 goto cleanup;
236 }
237
238 struct GBAGUIRunner runner = {
239 .params = {
240 320, 240,
241 font, "/",
242 _drawStart, _drawEnd, _pollInput,
243 0, 0,
244
245 GUI_PARAMS_TRAIL
246 },
247 .setup = _setup,
248 .teardown = 0,
249 .gameLoaded = _gameLoaded,
250 .gameUnloaded = _gameUnloaded,
251 .prepareForFrame = 0,
252 .drawFrame = _drawFrame,
253 .pollGameInput = _pollGameInput
254 };
255 GBAGUIInit(&runner, 0);
256 GBAGUIRunloop(&runner);
257 GBAGUIDeinit(&runner);
258
259cleanup:
260 linearFree(renderer.outputBuffer);
261
262 if (logFile) {
263 logFile->close(logFile);
264 }
265
266 sf2d_free_texture(tex);
267 sf2d_fini();
268
269 if (hasSound) {
270 linearFree(audioLeft);
271 linearFree(audioRight);
272 }
273 csndExit();
274 return 0;
275}
276
277static void GBA3DSLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args) {
278 UNUSED(thread);
279 UNUSED(level);
280 if (!logFile) {
281 return;
282 }
283 char out[256];
284 size_t len = vsnprintf(out, sizeof(out), format, args);
285 if (len >= sizeof(out)) {
286 len = sizeof(out) - 1;
287 }
288 out[len] = '\n';
289 logFile->write(logFile, out, len + 1);
290}