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 static int native_rgb565;
  34
  35 /* memory card data */
  36 extern char Mcd1Data[MCD_SIZE];
  37 extern char McdDisable[2];
  38
  39 /* PCSX ReARMed core calls and stuff */
  40 int in_type1, in_type2;
  41 int in_a1[2] = { 127, 127 }, in_a2[2] = { 127, 127 };
  42 int in_keystate;
  43 int in_enable_vibration;
  44
  45 static int vout_open(void)
  46 {
  47         return 0;
  48 }
  49
  50 static void vout_set_mode(int w, int h, int raw_w, int raw_h, int bpp)
  51 {
  52 }
  53
  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
  64 static void vout_flip(const void *vram, int stride, int bgr24, int w, int h)
  65 {
  66         unsigned short *dest = vout_buf;
  67         const unsigned short *src = vram;
  68         int dstride = w, h1 = h;
  69
  70         if (vram == NULL) {
  71                 // blanking
  72                 memset(vout_buf, 0, dstride * h * 2);
  73                 goto out;
  74         }
  75
  76         if (bgr24)
  77         {
  78                 // XXX: could we switch to RETRO_PIXEL_FORMAT_XRGB8888 here?
  79                 for (; h1-- > 0; dest += dstride, src += stride)
  80                 {
  81                         bgr888_to_rgb565(dest, src, w * 3);
  82                 }
  83         }
  84         else
  85         {
  86                 for (; h1-- > 0; dest += dstride, src += stride)
  87                 {
  88                         bgr555_to_rgb565(dest, src, w * 2);
  89                 }
  90         }
  91
  92 out:
  93         if (!native_rgb565)
  94                 convert(vout_buf, w * h * 2);
  95         video_cb(vout_buf, w, h, w * 2);
  96         pl_rearmed_cbs.flip_cnt++;
  97 }
  98
  99 static void vout_close(void)
 100 {
 101 }
 102
 103 static void *pl_mmap(unsigned int size)
 104 {
 105         return psxMap(0, size, 0, MAP_TAG_VRAM);
 106 }
 107
 108 static void pl_munmap(void *ptr, unsigned int size)
 109 {
 110         psxUnmap(ptr, size, MAP_TAG_VRAM);
 111 }
 112
 113 struct rearmed_cbs pl_rearmed_cbs = {
 114         .pl_vout_open = vout_open,
 115         .pl_vout_set_mode = vout_set_mode,
 116         .pl_vout_flip = vout_flip,
 117         .pl_vout_close = vout_close,
 118         .mmap = pl_mmap,
 119         .munmap = pl_munmap,
 120         /* from psxcounters */
 121         .gpu_hcnt = &hSyncCount,
 122         .gpu_frame_count = &frame_counter,
 123 };
 124
 125 void pl_frame_limit(void)
 126 {
 127         /* called once per frame, make psxCpu->Execute() above return */
 128         stop = 1;
 129 }
 130
 131 void pl_timing_prepare(int is_pal)
 132 {
 133 }
 134
 135 void plat_trigger_vibrate(int is_strong)
 136 {
 137 }
 138
 139 void pl_update_gun(int *xn, int *yn, int *xres, int *yres, int *in)
 140 {
 141 }
 142
 143 /* sound calls */
 144 static int snd_init(void)
 145 {
 146         return 0;
 147 }
 148
 149 static void snd_finish(void)
 150 {
 151 }
 152
 153 static int snd_busy(void)
 154 {
 155         if (samples_to_send > samples_sent)
 156                 return 0; /* give more samples */
 157         else
 158                 return 1;
 159 }
 160
 161 static void snd_feed(void *buf, int bytes)
 162 {
 163         audio_batch_cb(buf, bytes / 4);
 164         samples_sent += bytes / 4;
 165 }
 166
 167 void out_register_libretro(struct out_driver *drv)
 168 {
 169         drv->name = "libretro";
 170         drv->init = snd_init;
 171         drv->finish = snd_finish;
 172         drv->busy = snd_busy;
 173         drv->feed = snd_feed;
 174 }
 175
 176 /* libretro */
 177 void retro_set_environment(retro_environment_t cb) { environ_cb = cb; }
 178 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
 179 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
 180 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
 181 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
 182 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
 183
 184 unsigned retro_api_version(void)
 185 {
 186         return RETRO_API_VERSION;
 187 }
 188
 189 void retro_set_controller_port_device(unsigned port, unsigned device)
 190 {
 191 }
 192
 193 void retro_get_system_info(struct retro_system_info *info)
 194 {
 195         memset(info, 0, sizeof(*info));
 196         info->library_name = "PCSX-ReARMed";
 197         info->library_version = REV;
 198         info->valid_extensions = "bin|cue|img|mdf|pbp|cbn";
 199         info->need_fullpath = true;
 200 }
 201
 202 void retro_get_system_av_info(struct retro_system_av_info *info)
 203 {
 204         memset(info, 0, sizeof(*info));
 205         info->timing.fps            = 60;
 206         info->timing.sample_rate    = 44100;
 207         info->geometry.base_width   = 320;
 208         info->geometry.base_height  = 240;
 209         info->geometry.max_width    = 640;
 210         info->geometry.max_height   = 512;
 211         info->geometry.aspect_ratio = 4.0 / 3.0;
 212 }
 213
 214 /* TODO */
 215 size_t retro_serialize_size(void)
 216 {
 217         return 0;
 218 }
 219
 220 bool retro_serialize(void *data, size_t size)
 221 {
 222         return false;
 223 }
 224
 225 bool retro_unserialize(const void *data, size_t size)
 226 {
 227         return false;
 228 }
 229
 230 void retro_cheat_reset(void)
 231 {
 232 }
 233
 234 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 235 {
 236 }
 237
 238 bool retro_load_game(const struct retro_game_info *info)
 239 {
 240         enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
 241         if (environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
 242                 native_rgb565 = 1;
 243                 fprintf(stderr, "RGB565 supported, using it\n");
 244         }
 245
 246         if (plugins_opened) {
 247                 ClosePlugins();
 248                 plugins_opened = 0;
 249         }
 250
 251         set_cd_image(info->path);
 252
 253         /* have to reload after set_cd_image for correct cdr plugin */
 254         if (LoadPlugins() == -1) {
 255                 printf("faled to load plugins\n");
 256                 return false;
 257         }
 258
 259         plugins_opened = 1;
 260         NetOpened = 0;
 261
 262         if (OpenPlugins() == -1) {
 263                 printf("faled to open plugins\n");
 264                 return false;
 265         }
 266
 267         plugin_call_rearmed_cbs();
 268
 269         Config.PsxAuto = 1;
 270         if (CheckCdrom() == -1) {
 271                 printf("unsupported/invalid CD image: %s\n", info->path);
 272                 return false;
 273         }
 274
 275         SysReset();
 276
 277         if (LoadCdrom() == -1) {
 278                 printf("could not load CD-ROM!\n");
 279                 return false;
 280         }
 281         emu_on_new_cd(0);
 282
 283         return true;
 284 }
 285
 286 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
 287 {
 288         return false;
 289 }
 290
 291 void retro_unload_game(void)
 292 {
 293 }
 294
 295 unsigned retro_get_region(void)
 296 {
 297         return RETRO_REGION_NTSC;
 298 }
 299
 300 void *retro_get_memory_data(unsigned id)
 301 {
 302         return Mcd1Data;
 303 }
 304
 305 size_t retro_get_memory_size(unsigned id)
 306 {
 307         return MCD_SIZE;
 308 }
 309
 310 void retro_reset(void)
 311 {
 312         SysReset();
 313 }
 314
 315 static const unsigned short retro_psx_map[] = {
 316         [RETRO_DEVICE_ID_JOYPAD_B]      = 1 << DKEY_CROSS,
 317         [RETRO_DEVICE_ID_JOYPAD_Y]      = 1 << DKEY_SQUARE,
 318         [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << DKEY_SELECT,
 319         [RETRO_DEVICE_ID_JOYPAD_START]  = 1 << DKEY_START,
 320         [RETRO_DEVICE_ID_JOYPAD_UP]     = 1 << DKEY_UP,
 321         [RETRO_DEVICE_ID_JOYPAD_DOWN]   = 1 << DKEY_DOWN,
 322         [RETRO_DEVICE_ID_JOYPAD_LEFT]   = 1 << DKEY_LEFT,
 323         [RETRO_DEVICE_ID_JOYPAD_RIGHT]  = 1 << DKEY_RIGHT,
 324         [RETRO_DEVICE_ID_JOYPAD_A]      = 1 << DKEY_CIRCLE,
 325         [RETRO_DEVICE_ID_JOYPAD_X]      = 1 << DKEY_TRIANGLE,
 326         [RETRO_DEVICE_ID_JOYPAD_L]      = 1 << DKEY_L1,
 327         [RETRO_DEVICE_ID_JOYPAD_R]      = 1 << DKEY_R1,
 328         [RETRO_DEVICE_ID_JOYPAD_L2]     = 1 << DKEY_L2,
 329         [RETRO_DEVICE_ID_JOYPAD_R2]     = 1 << DKEY_R2,
 330         [RETRO_DEVICE_ID_JOYPAD_L3]     = 1 << DKEY_L3,
 331         [RETRO_DEVICE_ID_JOYPAD_R3]     = 1 << DKEY_R3,
 332 };
 333 #define RETRO_PSX_MAP_LEN (sizeof(retro_psx_map) / sizeof(retro_psx_map[0]))
 334
 335 void retro_run(void)
 336 {
 337         int i;
 338
 339         input_poll_cb();
 340         in_keystate = 0;
 341         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 342                 if (input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, i))
 343                         in_keystate |= retro_psx_map[i];
 344         in_keystate <<= 16;
 345         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 346                 if (input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, i))
 347                         in_keystate |= retro_psx_map[i];
 348
 349         stop = 0;
 350         psxCpu->Execute();
 351
 352         samples_to_send += 44100 / 60;
 353 }
 354
 355 void retro_init(void)
 356 {
 357         const char *bios[] = { "scph1001", "scph5501", "scph7001" };
 358         const char *dir;
 359         char path[256];
 360         FILE *f = NULL;
 361         int i, ret, level;
 362
 363         ret = emu_core_preinit();
 364         ret |= emu_core_init();
 365         if (ret != 0) {
 366                 printf("PCSX init failed, sorry\n");
 367                 exit(1);
 368         }
 369
 370         vout_buf = malloc(640 * 512 * 2);
 371
 372         if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
 373         {
 374                 snprintf(Config.BiosDir, sizeof(Config.BiosDir), "%s/", dir);
 375
 376                 for (i = 0; i < sizeof(bios) / sizeof(bios[0]); i++) {
 377                         snprintf(path, sizeof(path), "%s/%s.bin", dir, bios[i]);
 378                         f = fopen(path, "r");
 379                         if (f != NULL) {
 380                                 snprintf(Config.Bios, sizeof(Config.Bios), "%s.bin", bios[i]);
 381                                 break;
 382                         }
 383                 }
 384         }
 385         if (f != NULL) {
 386                 printf("found BIOS file: %s\n", Config.Bios);
 387                 fclose(f);
 388         }
 389         else
 390                 printf("no BIOS files found.\n");
 391
 392         level = 1;
 393         environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
 394
 395         McdDisable[0] = 0;
 396         McdDisable[1] = 1;
 397 }
 398
 399 void retro_deinit(void)
 400 {
 401         SysClose();
 402         free(vout_buf);
 403         vout_buf = NULL;
 404 }
 405