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 /* PCSX ReARMed core calls and stuff */
  36 int in_type1, in_type2;
  37 int in_a1[2] = { 127, 127 }, in_a2[2] = { 127, 127 };
  38 int in_keystate;
  39 int in_enable_vibration;
  40
  41 static int vout_open(void)
  42 {
  43         return 0;
  44 }
  45
  46 static void vout_set_mode(int w, int h, int raw_w, int raw_h, int bpp)
  47 {
  48 }
  49
  50 static void convert(void *buf, size_t bytes)
  51 {
  52         unsigned int i, v, *p = buf;
  53
  54         for (i = 0; i < bytes / 4; i++) {
  55                 v = p[i];
  56                 p[i] = (v & 0x001f001f) | ((v >> 1) & 0x7fe07fe0);
  57         }
  58 }
  59
  60 static void vout_flip(const void *vram, int stride, int bgr24, int w, int h)
  61 {
  62         unsigned short *dest = vout_buf;
  63         const unsigned short *src = vram;
  64         int dstride = w, h1 = h;
  65
  66         if (vram == NULL) {
  67                 // blanking
  68                 memset(vout_buf, 0, dstride * h * 2);
  69                 goto out;
  70         }
  71
  72         if (bgr24)
  73         {
  74                 // XXX: could we switch to RETRO_PIXEL_FORMAT_XRGB8888 here?
  75                 for (; h1-- > 0; dest += dstride, src += stride)
  76                 {
  77                         bgr888_to_rgb565(dest, src, w * 3);
  78                 }
  79         }
  80         else
  81         {
  82                 for (; h1-- > 0; dest += dstride, src += stride)
  83                 {
  84                         bgr555_to_rgb565(dest, src, w * 2);
  85                 }
  86         }
  87
  88 out:
  89         if (!native_rgb565)
  90                 convert(vout_buf, w * h * 2);
  91         video_cb(vout_buf, w, h, w * 2);
  92         pl_rearmed_cbs.flip_cnt++;
  93 }
  94
  95 static void vout_close(void)
  96 {
  97 }
  98
  99 static void *pl_mmap(unsigned int size)
 100 {
 101         return psxMap(0, size, 0, MAP_TAG_VRAM);
 102 }
 103
 104 static void pl_munmap(void *ptr, unsigned int size)
 105 {
 106         psxUnmap(ptr, size, MAP_TAG_VRAM);
 107 }
 108
 109 struct rearmed_cbs pl_rearmed_cbs = {
 110         .pl_vout_open = vout_open,
 111         .pl_vout_set_mode = vout_set_mode,
 112         .pl_vout_flip = vout_flip,
 113         .pl_vout_close = vout_close,
 114         .mmap = pl_mmap,
 115         .munmap = pl_munmap,
 116         /* from psxcounters */
 117         .gpu_hcnt = &hSyncCount,
 118         .gpu_frame_count = &frame_counter,
 119 };
 120
 121 void pl_frame_limit(void)
 122 {
 123         /* called once per frame, make psxCpu->Execute() above return */
 124         stop = 1;
 125 }
 126
 127 void pl_timing_prepare(int is_pal)
 128 {
 129 }
 130
 131 void plat_trigger_vibrate(int is_strong)
 132 {
 133 }
 134
 135 void pl_update_gun(int *xn, int *yn, int *xres, int *yres, int *in)
 136 {
 137 }
 138
 139 /* sound calls */
 140 static int snd_init(void)
 141 {
 142         return 0;
 143 }
 144
 145 static void snd_finish(void)
 146 {
 147 }
 148
 149 static int snd_busy(void)
 150 {
 151         if (samples_to_send > samples_sent)
 152                 return 0; /* give more samples */
 153         else
 154                 return 1;
 155 }
 156
 157 static void snd_feed(void *buf, int bytes)
 158 {
 159         audio_batch_cb(buf, bytes / 4);
 160         samples_sent += bytes / 4;
 161 }
 162
 163 void out_register_libretro(struct out_driver *drv)
 164 {
 165         drv->name = "libretro";
 166         drv->init = snd_init;
 167         drv->finish = snd_finish;
 168         drv->busy = snd_busy;
 169         drv->feed = snd_feed;
 170 }
 171
 172 /* libretro */
 173 void retro_set_environment(retro_environment_t cb) { environ_cb = cb; }
 174 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
 175 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
 176 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
 177 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
 178 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
 179
 180 unsigned retro_api_version(void)
 181 {
 182         return RETRO_API_VERSION;
 183 }
 184
 185 void retro_set_controller_port_device(unsigned port, unsigned device)
 186 {
 187 }
 188
 189 void retro_get_system_info(struct retro_system_info *info)
 190 {
 191         memset(info, 0, sizeof(*info));
 192         info->library_name = "PCSX-ReARMed";
 193         info->library_version = REV;
 194         info->valid_extensions = "bin|cue|img|mdf|pbp|cbn";
 195         info->need_fullpath = true;
 196 }
 197
 198 void retro_get_system_av_info(struct retro_system_av_info *info)
 199 {
 200         memset(info, 0, sizeof(*info));
 201         info->timing.fps            = 60;
 202         info->timing.sample_rate    = 44100;
 203         info->geometry.base_width   = 320;
 204         info->geometry.base_height  = 240;
 205         info->geometry.max_width    = 640;
 206         info->geometry.max_height   = 512;
 207         info->geometry.aspect_ratio = 4.0 / 3.0;
 208 }
 209
 210 /* TODO */
 211 size_t retro_serialize_size(void)
 212 {
 213         return 0;
 214 }
 215
 216 bool retro_serialize(void *data, size_t size)
 217 {
 218         return false;
 219 }
 220
 221 bool retro_unserialize(const void *data, size_t size)
 222 {
 223         return false;
 224 }
 225
 226 void retro_cheat_reset(void)
 227 {
 228 }
 229
 230 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 231 {
 232 }
 233
 234 bool retro_load_game(const struct retro_game_info *info)
 235 {
 236         enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
 237         if (environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
 238                 native_rgb565 = 1;
 239                 SysPrintf("RGB565 supported, using it\n");
 240         }
 241
 242         if (plugins_opened) {
 243                 ClosePlugins();
 244                 plugins_opened = 0;
 245         }
 246
 247         set_cd_image(info->path);
 248
 249         /* have to reload after set_cd_image for correct cdr plugin */
 250         if (LoadPlugins() == -1) {
 251                 SysPrintf("failed to load plugins\n");
 252                 return false;
 253         }
 254
 255         plugins_opened = 1;
 256         NetOpened = 0;
 257
 258         if (OpenPlugins() == -1) {
 259                 SysPrintf("failed to open plugins\n");
 260                 return false;
 261         }
 262
 263         plugin_call_rearmed_cbs();
 264
 265         Config.PsxAuto = 1;
 266         if (CheckCdrom() == -1) {
 267                 SysPrintf("unsupported/invalid CD image: %s\n", info->path);
 268                 return false;
 269         }
 270
 271         SysReset();
 272
 273         if (LoadCdrom() == -1) {
 274                 SysPrintf("could not load CD-ROM!\n");
 275                 return false;
 276         }
 277         emu_on_new_cd(0);
 278
 279         return true;
 280 }
 281
 282 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
 283 {
 284         return false;
 285 }
 286
 287 void retro_unload_game(void)
 288 {
 289 }
 290
 291 unsigned retro_get_region(void)
 292 {
 293         return RETRO_REGION_NTSC;
 294 }
 295
 296 void *retro_get_memory_data(unsigned id)
 297 {
 298         return NULL;
 299 }
 300
 301 size_t retro_get_memory_size(unsigned id)
 302 {
 303         return 0;
 304 }
 305
 306 void retro_reset(void)
 307 {
 308         SysReset();
 309 }
 310
 311 static const unsigned short retro_psx_map[] = {
 312         [RETRO_DEVICE_ID_JOYPAD_B]      = 1 << DKEY_CROSS,
 313         [RETRO_DEVICE_ID_JOYPAD_Y]      = 1 << DKEY_SQUARE,
 314         [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << DKEY_SELECT,
 315         [RETRO_DEVICE_ID_JOYPAD_START]  = 1 << DKEY_START,
 316         [RETRO_DEVICE_ID_JOYPAD_UP]     = 1 << DKEY_UP,
 317         [RETRO_DEVICE_ID_JOYPAD_DOWN]   = 1 << DKEY_DOWN,
 318         [RETRO_DEVICE_ID_JOYPAD_LEFT]   = 1 << DKEY_LEFT,
 319         [RETRO_DEVICE_ID_JOYPAD_RIGHT]  = 1 << DKEY_RIGHT,
 320         [RETRO_DEVICE_ID_JOYPAD_A]      = 1 << DKEY_CIRCLE,
 321         [RETRO_DEVICE_ID_JOYPAD_X]      = 1 << DKEY_TRIANGLE,
 322         [RETRO_DEVICE_ID_JOYPAD_L]      = 1 << DKEY_L1,
 323         [RETRO_DEVICE_ID_JOYPAD_R]      = 1 << DKEY_R1,
 324         [RETRO_DEVICE_ID_JOYPAD_L2]     = 1 << DKEY_L2,
 325         [RETRO_DEVICE_ID_JOYPAD_R2]     = 1 << DKEY_R2,
 326         [RETRO_DEVICE_ID_JOYPAD_L3]     = 1 << DKEY_L3,
 327         [RETRO_DEVICE_ID_JOYPAD_R3]     = 1 << DKEY_R3,
 328 };
 329 #define RETRO_PSX_MAP_LEN (sizeof(retro_psx_map) / sizeof(retro_psx_map[0]))
 330
 331 void retro_run(void)
 332 {
 333         int i;
 334
 335         input_poll_cb();
 336         in_keystate = 0;
 337         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 338                 if (input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, i))
 339                         in_keystate |= retro_psx_map[i];
 340         in_keystate <<= 16;
 341         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 342                 if (input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, i))
 343                         in_keystate |= retro_psx_map[i];
 344
 345         stop = 0;
 346         psxCpu->Execute();
 347
 348         samples_to_send += 44100 / 60;
 349 }
 350
 351 void retro_init(void)
 352 {
 353         const char *bios[] = { "scph1001", "scph5501", "scph7001" };
 354         const char *dir;
 355         char path[256];
 356         FILE *f = NULL;
 357         int i, ret, level;
 358
 359         ret = emu_core_preinit();
 360         ret |= emu_core_init();
 361         if (ret != 0) {
 362                 SysPrintf("PCSX init failed.\n");
 363                 exit(1);
 364         }
 365
 366         vout_buf = malloc(640 * 512 * 2);
 367
 368         if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
 369         {
 370                 snprintf(Config.BiosDir, sizeof(Config.BiosDir), "%s/", dir);
 371
 372                 for (i = 0; i < sizeof(bios) / sizeof(bios[0]); i++) {
 373                         snprintf(path, sizeof(path), "%s/%s.bin", dir, bios[i]);
 374                         f = fopen(path, "r");
 375                         if (f != NULL) {
 376                                 snprintf(Config.Bios, sizeof(Config.Bios), "%s.bin", bios[i]);
 377                                 break;
 378                         }
 379                 }
 380         }
 381         if (f != NULL) {
 382                 SysPrintf("found BIOS file: %s\n", Config.Bios);
 383                 fclose(f);
 384         }
 385         else
 386                 SysPrintf("no BIOS files found.\n");
 387
 388         level = 1;
 389         environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
 390 }
 391
 392 void retro_deinit(void)
 393 {
 394         SysClose();
 395         free(vout_buf);
 396         vout_buf = NULL;
 397 }
 398