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/new_dynarec/new_dynarec.h"
  15 #include "../plugins/dfsound/out.h"
  16 #include "main.h"
  17 #include "plugin.h"
  18 #include "plugin_lib.h"
  19 #include "revision.h"
  20 #include "libretro.h"
  21
  22 static retro_video_refresh_t video_cb;
  23 static retro_input_poll_t input_poll_cb;
  24 static retro_input_state_t input_state_cb;
  25 static retro_environment_t environ_cb;
  26 static retro_audio_sample_batch_t audio_batch_cb;
  27
  28 static void *vout_buf;
  29 static int vout_width, vout_height;
  30 static int samples_sent, samples_to_send;
  31 static int plugins_opened;
  32 static int native_rgb565;
  33
  34 /* PCSX ReARMed core calls and stuff */
  35 int in_type1, in_type2;
  36 int in_a1[2] = { 127, 127 }, in_a2[2] = { 127, 127 };
  37 int in_keystate;
  38 int in_enable_vibration;
  39
  40 static int vout_open(void)
  41 {
  42         return 0;
  43 }
  44
  45 static void *vout_set_mode(int w, int h, int bpp)
  46 {
  47         vout_width = w;
  48         vout_height = h;
  49         return vout_buf;
  50 }
  51
  52 /* FIXME: either teach PCSX to blit to RGB1555 or RetroArch to support RGB565 */
  53 static void convert(void *buf, size_t bytes)
  54 {
  55         unsigned int i, v, *p = buf;
  56
  57         for (i = 0; i < bytes / 4; i++) {
  58                 v = p[i];
  59                 p[i] = (v & 0x001f001f) | ((v >> 1) & 0x7fe07fe0);
  60         }
  61 }
  62
  63 static void *vout_flip(void)
  64 {
  65         pl_rearmed_cbs.flip_cnt++;
  66         if (!native_rgb565)
  67                 convert(vout_buf,  vout_width * vout_height * 2);
  68         video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
  69
  70         return vout_buf;
  71 }
  72
  73 static void vout_close(void)
  74 {
  75 }
  76
  77 struct rearmed_cbs pl_rearmed_cbs = {
  78         .pl_vout_open = vout_open,
  79         .pl_vout_set_mode = vout_set_mode,
  80         .pl_vout_flip = vout_flip,
  81         .pl_vout_close = vout_close,
  82         /* from psxcounters */
  83         .gpu_hcnt = &hSyncCount,
  84         .gpu_frame_count = &frame_counter,
  85 };
  86
  87 void pl_frame_limit(void)
  88 {
  89         /* called once per frame, make psxCpu->Execute() above return */
  90         stop = 1;
  91 }
  92
  93 void pl_timing_prepare(int is_pal)
  94 {
  95 }
  96
  97 void plat_trigger_vibrate(int is_strong)
  98 {
  99 }
 100
 101 void pl_update_gun(int *xn, int *xres, int *y, int *in)
 102 {
 103 }
 104
 105 /* sound calls */
 106 static int snd_init(void)
 107 {
 108         return 0;
 109 }
 110
 111 static void snd_finish(void)
 112 {
 113 }
 114
 115 static int snd_busy(void)
 116 {
 117         if (samples_to_send > samples_sent)
 118                 return 0; /* give more samples */
 119         else
 120                 return 1;
 121 }
 122
 123 static void snd_feed(void *buf, int bytes)
 124 {
 125         audio_batch_cb(buf, bytes / 4);
 126         samples_sent += bytes / 4;
 127 }
 128
 129 void out_register_libretro(struct out_driver *drv)
 130 {
 131         drv->name = "libretro";
 132         drv->init = snd_init;
 133         drv->finish = snd_finish;
 134         drv->busy = snd_busy;
 135         drv->feed = snd_feed;
 136 }
 137
 138 /* libretro */
 139 void retro_set_environment(retro_environment_t cb) { environ_cb = cb; }
 140 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
 141 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
 142 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
 143 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
 144 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
 145
 146 unsigned retro_api_version(void)
 147 {
 148         return RETRO_API_VERSION;
 149 }
 150
 151 void retro_set_controller_port_device(unsigned port, unsigned device)
 152 {
 153 }
 154
 155 void retro_get_system_info(struct retro_system_info *info)
 156 {
 157         memset(info, 0, sizeof(*info));
 158         info->library_name = "PCSX-ReARMed";
 159         info->library_version = REV;
 160         info->valid_extensions = "bin|cue|img|mdf|pbp|cbn";
 161         info->need_fullpath = true;
 162 }
 163
 164 void retro_get_system_av_info(struct retro_system_av_info *info)
 165 {
 166         memset(info, 0, sizeof(*info));
 167         info->timing.fps            = 60;
 168         info->timing.sample_rate    = 44100;
 169         info->geometry.base_width   = 320;
 170         info->geometry.base_height  = 240;
 171         info->geometry.max_width    = 640;
 172         info->geometry.max_height   = 512;
 173         info->geometry.aspect_ratio = 4.0 / 3.0;
 174 }
 175
 176 /* TODO */
 177 size_t retro_serialize_size(void)
 178 {
 179         return 0;
 180 }
 181
 182 bool retro_serialize(void *data, size_t size)
 183 {
 184         return false;
 185 }
 186
 187 bool retro_unserialize(const void *data, size_t size)
 188 {
 189         return false;
 190 }
 191
 192 void retro_cheat_reset(void)
 193 {
 194 }
 195
 196 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 197 {
 198 }
 199
 200 bool retro_load_game(const struct retro_game_info *info)
 201 {
 202         enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
 203         if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
 204                 native_rgb565 = 1;
 205                 fprintf(stderr, "RGB565 supported, using it\n");
 206         }
 207
 208         if (plugins_opened) {
 209                 ClosePlugins();
 210                 plugins_opened = 0;
 211         }
 212
 213         set_cd_image(info->path);
 214
 215         /* have to reload after set_cd_image for correct cdr plugin */
 216         if (LoadPlugins() == -1) {
 217                 printf("faled to load plugins\n");
 218                 return false;
 219         }
 220
 221         plugins_opened = 1;
 222         NetOpened = 0;
 223
 224         if (OpenPlugins() == -1) {
 225                 printf("faled to open plugins\n");
 226                 return false;
 227         }
 228
 229         plugin_call_rearmed_cbs();
 230
 231         Config.PsxAuto = 1;
 232         if (CheckCdrom() == -1) {
 233                 printf("unsupported/invalid CD image: %s\n", info->path);
 234                 return false;
 235         }
 236
 237         SysReset();
 238
 239         if (LoadCdrom() == -1) {
 240                 printf("could not load CD-ROM!\n");
 241                 return false;
 242         }
 243         emu_on_new_cd();
 244
 245         return true;
 246 }
 247
 248 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
 249 {
 250         return false;
 251 }
 252
 253 void retro_unload_game(void)
 254 {
 255 }
 256
 257 unsigned retro_get_region(void)
 258 {
 259         return RETRO_REGION_NTSC;
 260 }
 261
 262 void *retro_get_memory_data(unsigned id)
 263 {
 264         return NULL;
 265 }
 266
 267 size_t retro_get_memory_size(unsigned id)
 268 {
 269         return 0;
 270 }
 271
 272 void retro_reset(void)
 273 {
 274         SysReset();
 275 }
 276
 277 static const unsigned short retro_psx_map[] = {
 278         [RETRO_DEVICE_ID_JOYPAD_B]      = 1 << DKEY_CROSS,
 279         [RETRO_DEVICE_ID_JOYPAD_Y]      = 1 << DKEY_SQUARE,
 280         [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << DKEY_SELECT,
 281         [RETRO_DEVICE_ID_JOYPAD_START]  = 1 << DKEY_START,
 282         [RETRO_DEVICE_ID_JOYPAD_UP]     = 1 << DKEY_UP,
 283         [RETRO_DEVICE_ID_JOYPAD_DOWN]   = 1 << DKEY_DOWN,
 284         [RETRO_DEVICE_ID_JOYPAD_LEFT]   = 1 << DKEY_LEFT,
 285         [RETRO_DEVICE_ID_JOYPAD_RIGHT]  = 1 << DKEY_RIGHT,
 286         [RETRO_DEVICE_ID_JOYPAD_A]      = 1 << DKEY_CIRCLE,
 287         [RETRO_DEVICE_ID_JOYPAD_X]      = 1 << DKEY_TRIANGLE,
 288         [RETRO_DEVICE_ID_JOYPAD_L]      = 1 << DKEY_L1,
 289         [RETRO_DEVICE_ID_JOYPAD_R]      = 1 << DKEY_R1,
 290         [RETRO_DEVICE_ID_JOYPAD_L2]     = 1 << DKEY_L2,
 291         [RETRO_DEVICE_ID_JOYPAD_R2]     = 1 << DKEY_R2,
 292         [RETRO_DEVICE_ID_JOYPAD_L3]     = 1 << DKEY_L3,
 293         [RETRO_DEVICE_ID_JOYPAD_R3]     = 1 << DKEY_R3,
 294 };
 295 #define RETRO_PSX_MAP_LEN (sizeof(retro_psx_map) / sizeof(retro_psx_map[0]))
 296
 297 void retro_run(void)
 298 {
 299         int i;
 300
 301         input_poll_cb();
 302         in_keystate = 0;
 303         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 304                 if (input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, i))
 305                         in_keystate |= retro_psx_map[i];
 306         in_keystate <<= 16;
 307         for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
 308                 if (input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, i))
 309                         in_keystate |= retro_psx_map[i];
 310
 311         stop = 0;
 312         psxCpu->Execute();
 313
 314         samples_to_send += 44100 / 60;
 315 }
 316
 317 void retro_init(void)
 318 {
 319         const char *bios[] = { "scph1001", "scph5501", "scph7001" };
 320         const char *dir;
 321         char path[256];
 322         FILE *f = NULL;
 323         int i, ret, level;
 324
 325         ret = emu_core_preinit();
 326         ret |= emu_core_init();
 327         if (ret != 0) {
 328                 printf("PCSX init failed, sorry\n");
 329                 exit(1);
 330         }
 331
 332         vout_buf = malloc(640 * 512 * 2);
 333
 334         if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
 335         {
 336                 snprintf(Config.BiosDir, sizeof(Config.BiosDir), "%s/", dir);
 337
 338                 for (i = 0; i < sizeof(bios) / sizeof(bios[0]); i++) {
 339                         snprintf(path, sizeof(path), "%s/%s.bin", dir, bios[i]);
 340                         f = fopen(path, "r");
 341                         if (f != NULL) {
 342                                 snprintf(Config.Bios, sizeof(Config.Bios), "%s.bin", bios[i]);
 343                                 break;
 344                         }
 345                 }
 346         }
 347         if (f != NULL) {
 348                 printf("found BIOS file: %s\n", Config.Bios);
 349                 fclose(f);
 350         }
 351         else
 352                 printf("no BIOS files found.\n");
 353
 354         level = 1;
 355         environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
 356 }
 357
 358 void retro_deinit(void)
 359 {
 360         SysClose();
 361         free(vout_buf);
 362         vout_buf = NULL;
 363 }
 364