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