frontend/libretro.c

   1 /*
   2  * (C) notaz, 2012
   3  *
   4  * This work is licensed under the terms of the GNU GPLv2 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11
  12 #include "../libpcsxcore/misc.h"
  13 #include "../libpcsxcore/psxcounters.h"
  14 #include "../libpcsxcore/psxmem_map.h"
  15 #include "../libpcsxcore/new_dynarec/new_dynarec.h"
  16 #include "../plugins/dfsound/out.h"
  17 #include "../plugins/gpulib/cspace.h"
  18 #include "main.h"
  19 #include "plugin.h"
  20 #include "plugin_lib.h"
  21 #include "revision.h"
  22 #include "libretro.h"
  23
  24 static retro_video_refresh_t video_cb;
  25 static retro_input_poll_t input_poll_cb;
  26 static retro_input_state_t input_state_cb;
  27 static retro_environment_t environ_cb;
  28 static retro_audio_sample_batch_t audio_batch_cb;
  29
  30 static void *vout_buf;
  31 static int samples_sent, samples_to_send;
  32 static int plugins_opened;
  33
  34 /* memory card data */
  35 extern char Mcd1Data[MCD_SIZE];
  36 extern char McdDisable[2];
  37
  38 /* PCSX ReARMed core calls and stuff */
  39 int in_type1, in_type2;
  40 int in_a1[2] = { 127, 127 }, in_a2[2] = { 127, 127 };
  41 int in_keystate;
  42 int in_enable_vibration;
  43
  44 static void init_memcard(char *mcd_data)
  45 {
  46         unsigned off = 0;
  47         unsigned i;
  48
  49         memset(mcd_data, 0, MCD_SIZE);
  50
  51         mcd_data[off++] = 'M';
  52         mcd_data[off++] = 'C';
  53         off += 0x7d;
  54         mcd_data[off++] = 0x0e;
  55
  56         for (i = 0; i < 15; i++) {
  57                 mcd_data[off++] = 0xa0;
  58                 off += 0x07;
  59                 mcd_data[off++] = 0xff;
  60                 mcd_data[off++] = 0xff;
  61                 off += 0x75;
  62                 mcd_data[off++] = 0xa0;
  63         }
  64
  65         for (i = 0; i < 20; i++) {
  66                 mcd_data[off++] = 0xff;
  67                 mcd_data[off++] = 0xff;
  68                 mcd_data[off++] = 0xff;
  69                 mcd_data[off++] = 0xff;
  70                 off += 0x04;
  71                 mcd_data[off++] = 0xff;
  72                 mcd_data[off++] = 0xff;
  73                 off += 0x76;
  74         }
  75 }
  76
  77 static int vout_open(void)
  78 {
  79         return 0;
  80 }
  81
  82 static void vout_set_mode(int w, int h, int raw_w, int raw_h, int bpp)
  83 {
  84 }
  85
  86 #ifndef FRONTEND_SUPPORTS_RGB565
  87 static void convert(void *buf, size_t bytes)
  88 {
  89         unsigned int i, v, *p = buf;
  90
  91         for (i = 0; i < bytes / 4; i++) {
  92                 v = p[i];
  93                 p[i] = (v & 0x001f001f) | ((v >> 1) & 0x7fe07fe0);
  94         }
  95 }
  96 #endif
  97
  98 static unsigned game_width;
  99 static unsigned game_height;
 100 static unsigned game_fb_dirty;
 101
 102 static void vout_flip(const void *vram, int stride, int bgr24, int w, int h)
 103 {
 104         unsigned short *dest = vout_buf;
 105         const unsigned short *src = vram;
 106         int dstride = w, h1 = h;
 107
 108         if (vram == NULL) {
 109                 // blanking
 110                 memset(vout_buf, 0, dstride * h * 2);
 111                 goto out;
 112         }
 113
 114         if (bgr24)
 115         {
 116                 // XXX: could we switch to RETRO_PIXEL_FORMAT_XRGB8888 here?
 117                 for (; h1-- > 0; dest += dstride, src += stride)
 118                 {
 119                         bgr888_to_rgb565(dest, src, w * 3);
 120                 }
 121         }
 122         else
 123         {
 124                 for (; h1-- > 0; dest += dstride, src += stride)
 125                 {
 126                         bgr555_to_rgb565(dest, src, w * 2);
 127                 }
 128         }
 129
 130 out:
 131 #ifndef FRONTEND_SUPPORTS_RGB565
 132         convert(vout_buf, w * h * 2);
 133 #endif
 134         game_width = w;
 135         game_height = h;
 136         game_fb_dirty = 1;
 137         pl_rearmed_cbs.flip_cnt++;
 138 }
 139
 140 static void vout_close(void)
 141 {
 142 }
 143
 144 static void *pl_mmap(unsigned int size)
 145 {
 146         return psxMap(0, size, 0, MAP_TAG_VRAM);
 147 }
 148
 149 static void pl_munmap(void *ptr, unsigned int size)
 150 {
 151         psxUnmap(ptr, size, MAP_TAG_VRAM);
 152 }
 153
 154 struct rearmed_cbs pl_rearmed_cbs = {
 155         .pl_vout_open = vout_open,
 156         .pl_vout_set_mode = vout_set_mode,
 157         .pl_vout_flip = vout_flip,
 158         .pl_vout_close = vout_close,
 159         .mmap = pl_mmap,
 160         .munmap = pl_munmap,
 161         /* from psxcounters */
 162         .gpu_hcnt = &hSyncCount,
 163         .gpu_frame_count = &frame_counter,
 164 };
 165
 166 void pl_frame_limit(void)
 167 {
 168         /* called once per frame, make psxCpu->Execute() above return */
 169         stop = 1;
 170 }
 171
 172 void pl_timing_prepare(int is_pal)
 173 {
 174 }
 175
 176 void plat_trigger_vibrate(int is_strong)
 177 {
 178 }
 179
 180 void pl_update_gun(int *xn, int *yn, int *xres, int *yres, int *in)
 181 {
 182 }
 183
 184 /* sound calls */
 185 static int snd_init(void)
 186 {
 187         return 0;
 188 }
 189
 190 static void snd_finish(void)
 191 {
 192 }
 193
 194 static int snd_busy(void)
 195 {
 196         if (samples_to_send > samples_sent)
 197                 return 0; /* give more samples */
 198         else
 199                 return 1;
 200 }
 201
 202 static void snd_feed(void *buf, int bytes)
 203 {
 204         audio_batch_cb(buf, bytes / 4);
 205         samples_sent += bytes / 4;
 206 }
 207
 208 void out_register_libretro(struct out_driver *drv)
 209 {
 210         drv->name = "libretro";
 211         drv->init = snd_init;
 212         drv->finish = snd_finish;
 213         drv->busy = snd_busy;
 214         drv->feed = snd_feed;
 215 }
 216
 217 /* libretro */
 218 void retro_set_environment(retro_environment_t cb) { environ_cb = cb; }
 219 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
 220 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
 221 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
 222 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
 223 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
 224
 225 unsigned retro_api_version(void)
 226 {
 227         return RETRO_API_VERSION;
 228 }
 229
 230 void retro_set_controller_port_device(unsigned port, unsigned device)
 231 {
 232 }
 233
 234 void retro_get_system_info(struct retro_system_info *info)
 235 {
 236         memset(info, 0, sizeof(*info));
 237         info->library_name = "PCSX-ReARMed";
 238         info->library_version = REV;
 239         info->valid_extensions = "bin|cue|img|mdf|pbp|cbn";
 240         info->need_fullpath = true;
 241 }
 242
 243 void retro_get_system_av_info(struct retro_system_av_info *info)
 244 {
 245         memset(info, 0, sizeof(*info));
 246         info->timing.fps            = 60;
 247         info->timing.sample_rate    = 44100;
 248         info->geometry.base_width   = 320;
 249         info->geometry.base_height  = 240;
 250         info->geometry.max_width    = 640;
 251         info->geometry.max_height   = 512;
 252         info->geometry.aspect_ratio = 4.0 / 3.0;
 253 }
 254
 255 /* TODO */
 256 size_t retro_serialize_size(void)
 257 {
 258         return 0;
 259 }
 260
 261 bool retro_serialize(void *data, size_t size)
 262 {
 263         return false;
 264 }
 265
 266 bool retro_unserialize(const void *data, size_t size)
 267 {
 268         return false;
 269 }
 270
 271 void retro_cheat_reset(void)
 272 {
 273 }
 274
 275 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 276 {
 277 }
 278
 279 bool retro_load_game(const struct retro_game_info *info)
 280 {
 281 #ifdef FRONTEND_SUPPORTS_RGB565
 282         enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
 283         if (environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
 284                 fprintf(stderr, "RGB565 supported, using it\n");
 285         }
 286 #endif
 287
 288         if (plugins_opened) {
 289                 ClosePlugins();
 290                 plugins_opened = 0;
 291         }
 292
 293         set_cd_image(info->path);
 294
 295         /* have to reload after set_cd_image for correct cdr plugin */
 296         if (LoadPlugins() == -1) {
 297                 printf("faled to load plugins\n");
 298                 return false;
 299         }
 300
 301         plugins_opened = 1;
 302         NetOpened = 0;
 303
 304         if (OpenPlugins() == -1) {
 305                 printf("faled to open plugins\n");
 306                 return false;
 307         }
 308
 309         plugin_call_rearmed_cbs();
 310
 311         Config.PsxAuto = 1;
 312         if (CheckCdrom() == -1) {
 313                 printf("unsupported/invalid CD image: %s\n", info->path);
 314                 return false;
 315         }
 316
 317         SysReset();
 318
 319         if (LoadCdrom() == -1) {
 320                 printf("could not load CD-ROM!\n");
 321                 return false;
 322         }
 323         emu_on_new_cd(0);
 324
 325         return true;
 326 }
 327
 328 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
 329 {
 330         return false;
 331 }
 332
 333 void retro_unload_game(void)
 334 {
 335 }
 336
 337 unsigned retro_get_region(void)
 338 {
 339         return RETRO_REGION_NTSC;
 340 }
 341
 342 void *retro_get_memory_data(unsigned id)
 343 {
 344         return Mcd1Data;
 345 }
 346
 347 size_t retro_get_memory_size(unsigned id)
 348 {
 349         return MCD_SIZE;
 350 }
 351
 352 void retro_reset(void)
 353 {
 354         SysReset();
 355 }
 356
 357 static const unsigned short retro_psx_map[] = {
 358         [RETRO_DEVICE_ID_JOYPAD_B]      = 1 << DKEY_CROSS,
 359         [RETRO_DEVICE_ID_JOYPAD_Y]      = 1 << DKEY_SQUARE,
 360         [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << DKEY_SELECT,
 361         [RETRO_DEVICE_ID_JOYPAD_START]  = 1 << DKEY_START,
 362         [RETRO_DEVICE_ID_JOYPAD_UP]     = 1 << DKEY_UP,
 363         [RETRO_DEVICE_ID_JOYPAD_DOWN]   = 1 << DKEY_DOWN,
 364         [RETRO_DEVICE_ID_JOYPAD_LEFT]   = 1 << DKEY_LEFT,
 365         [RETRO_DEVICE_ID_JOYPAD_RIGHT]  = 1 << DKEY_RIGHT,
 366         [RETRO_DEVICE_ID_JOYPAD_A]      = 1 << DKEY_CIRCLE,
 367         [RETRO_DEVICE_ID_JOYPAD_X]      = 1 << DKEY_TRIANGLE,
 368         [RETRO_DEVICE_ID_JOYPAD_L]      = 1 << DKEY_L1,
 369         [RETRO_DEVICE_ID_JOYPAD_R]      = 1 << DKEY_R1,
 370         [RETRO_DEVICE_ID_JOYPAD_L2]     = 1 << DKEY_L2,
 371         [RETRO_DEVICE_ID_JOYPAD_R2]     = 1 << DKEY_R2,
 372         [RETRO_DEVICE_ID_JOYPAD_L3]     = 1 << DKEY_L3,
 373         [RETRO_DEVICE_ID_JOYPAD_R3]     = 1 << DKEY_R3,
 374 };
 375 #define RETRO_PSX_MAP_LEN (sizeof(retro_psx_map) / sizeof(retro_psx_map[0]))
 376
 377 void retro_run(void)
 378 {
 379         int i;
 380
 381         input_poll_cb();
 382         in_keystate = 0;
 383         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 384                 if (input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, i))
 385                         in_keystate |= retro_psx_map[i];
 386         in_keystate <<= 16;
 387         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 388                 if (input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, i))
 389                         in_keystate |= retro_psx_map[i];
 390
 391         stop = 0;
 392         psxCpu->Execute();
 393
 394         samples_to_send += 44100 / 60;
 395
 396         video_cb(game_fb_dirty ? vout_buf : NULL, game_width, game_height, game_width * 2);
 397         game_fb_dirty = 0;
 398 }
 399
 400 void retro_init(void)
 401 {
 402         const char *bios[] = { "scph1001", "scph5501", "scph7001" };
 403         const char *dir;
 404         char path[256];
 405         FILE *f = NULL;
 406         int i, ret, level;
 407
 408         ret = emu_core_preinit();
 409         ret |= emu_core_init();
 410         if (ret != 0) {
 411                 printf("PCSX init failed, sorry\n");
 412                 exit(1);
 413         }
 414
 415         vout_buf = malloc(640 * 512 * 2);
 416
 417         if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
 418         {
 419                 snprintf(Config.BiosDir, sizeof(Config.BiosDir), "%s/", dir);
 420
 421                 for (i = 0; i < sizeof(bios) / sizeof(bios[0]); i++) {
 422                         snprintf(path, sizeof(path), "%s/%s.bin", dir, bios[i]);
 423                         f = fopen(path, "r");
 424                         if (f != NULL) {
 425                                 snprintf(Config.Bios, sizeof(Config.Bios), "%s.bin", bios[i]);
 426                                 break;
 427                         }
 428                 }
 429         }
 430         if (f != NULL) {
 431                 printf("found BIOS file: %s\n", Config.Bios);
 432                 fclose(f);
 433         }
 434         else
 435                 printf("no BIOS files found.\n");
 436
 437         level = 1;
 438         environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
 439
 440         McdDisable[0] = 0;
 441         McdDisable[1] = 1;
 442         init_memcard(Mcd1Data);
 443 }
 444
 445 void retro_deinit(void)
 446 {
 447         SysClose();
 448         free(vout_buf);
 449         vout_buf = NULL;
 450 }