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