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