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