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