stream/stream_dvdnav.c

   1 #include "config.h"
   2
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <unistd.h>
   6 #include <string.h>
   7 #include <errno.h>
   8 #include "mp_msg.h"
   9 #include "osdep/timer.h"
  10 #include "input/input.h"
  11 #include "stream.h"
  12 #include "libmpdemux/demuxer.h"
  13 #include "stream_dvdnav.h"
  14 #include "libvo/video_out.h"
  15 #include "libavutil/common.h"
  16 #include "spudec.h"
  17 #include "m_option.h"
  18 #include "m_struct.h"
  19 #include "help_mp.h"
  20
  21 extern char *dvd_device;
  22 extern int dvd_chapter;
  23 extern int dvd_last_chapter;
  24 extern int dvd_angle;
  25 extern char *audio_lang, *dvdsub_lang;
  26 extern char *dvd_audio_stream_channels[6], *dvd_audio_stream_types[8];
  27
  28 static struct stream_priv_s {
  29   int track;
  30   char* device;
  31 } stream_priv_dflts = {
  32   0,
  33   NULL
  34 };
  35
  36 #define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
  37 /// URL definition
  38 static const m_option_t stream_opts_fields[] = {
  39   {"filename",  ST_OFF(device), CONF_TYPE_STRING, 0, 0, 0, NULL },
  40   {"hostname",  ST_OFF(track), CONF_TYPE_INT, 0, 0, 0, NULL},
  41   { NULL, NULL, 0, 0, 0, 0,  NULL }
  42 };
  43 static struct m_struct_st stream_opts = {
  44   "dvd",
  45   sizeof(struct stream_priv_s),
  46   &stream_priv_dflts,
  47   stream_opts_fields
  48 };
  49
  50 static int seek(stream_t *s, off_t newpos);
  51
  52 static dvdnav_priv_t * new_dvdnav_stream(char * filename) {
  53   char * title_str;
  54   dvdnav_priv_t *priv;
  55
  56   if (!filename)
  57     return NULL;
  58
  59   if (!(priv=calloc(1,sizeof(dvdnav_priv_t))))
  60     return NULL;
  61
  62   if (!(priv->filename=strdup(filename))) {
  63     free(priv);
  64     return NULL;
  65   }
  66
  67   if(dvdnav_open(&(priv->dvdnav),priv->filename)!=DVDNAV_STATUS_OK)
  68   {
  69     free(priv->filename);
  70     free(priv);
  71     return NULL;
  72   }
  73
  74   if (!priv->dvdnav) {
  75     free(priv);
  76     return NULL;
  77   }
  78
  79   if(1) //from vlc: if not used dvdnav from cvs will fail
  80   {
  81     int len, event;
  82     char buf[2048];
  83
  84     dvdnav_get_next_block(priv->dvdnav,buf,&event,&len);
  85     dvdnav_sector_search(priv->dvdnav, 0, SEEK_SET);
  86   }
  87
  88   /* turn off dvdnav caching */
  89   dvdnav_set_readahead_flag(priv->dvdnav, 0);
  90   if(dvdnav_set_PGC_positioning_flag(priv->dvdnav, 1) != DVDNAV_STATUS_OK)
  91     mp_msg(MSGT_OPEN,MSGL_ERR,"stream_dvdnav, failed to set PGC positioning\n");
  92 #if 1
  93   /* report the title?! */
  94   if (dvdnav_get_title_string(priv->dvdnav,&title_str)==DVDNAV_STATUS_OK) {
  95     mp_msg(MSGT_IDENTIFY, MSGL_INFO,"Title: '%s'\n",title_str);
  96   }
  97 #endif
  98
  99   //dvdnav_event_clear(priv);
 100
 101   return priv;
 102 }
 103
 104 static void dvdnav_get_highlight (dvdnav_priv_t *priv, int display_mode) {
 105   pci_t *pnavpci = NULL;
 106   dvdnav_highlight_event_t *hlev = &(priv->hlev);
 107   int btnum;
 108
 109   if (!priv || !priv->dvdnav)
 110     return;
 111
 112   pnavpci = dvdnav_get_current_nav_pci (priv->dvdnav);
 113   if (!pnavpci)
 114     return;
 115
 116   dvdnav_get_current_highlight (priv->dvdnav, &(hlev->buttonN));
 117   hlev->display = display_mode; /* show */
 118
 119   if (hlev->buttonN > 0 && pnavpci->hli.hl_gi.btn_ns > 0 && hlev->display) {
 120     for (btnum = 0; btnum < pnavpci->hli.hl_gi.btn_ns; btnum++) {
 121       btni_t *btni = &(pnavpci->hli.btnit[btnum]);
 122
 123       if (hlev->buttonN == btnum + 1) {
 124         hlev->sx = FFMIN (btni->x_start, btni->x_end);
 125         hlev->ex = FFMAX (btni->x_start, btni->x_end);
 126         hlev->sy = FFMIN (btni->y_start, btni->y_end);
 127         hlev->ey = FFMAX (btni->y_start, btni->y_end);
 128
 129         hlev->palette = (btni->btn_coln == 0) ? 0 :
 130           pnavpci->hli.btn_colit.btn_coli[btni->btn_coln - 1][0];
 131         break;
 132       }
 133     }
 134   } else { /* hide button or no button */
 135     hlev->sx = hlev->ex = 0;
 136     hlev->sy = hlev->ey = 0;
 137     hlev->palette = hlev->buttonN = 0;
 138   }
 139 }
 140
 141 static int dvdnav_stream_read(dvdnav_priv_t * priv, unsigned char *buf, int *len) {
 142   int event = DVDNAV_NOP;
 143
 144   *len=-1;
 145   if (dvdnav_get_next_block(priv->dvdnav,buf,&event,len)!=DVDNAV_STATUS_OK) {
 146     mp_msg(MSGT_OPEN,MSGL_V, "Error getting next block from DVD %d (%s)\n",event, dvdnav_err_to_string(priv->dvdnav) );
 147     *len=-1;
 148   }
 149   else if (event!=DVDNAV_BLOCK_OK) {
 150     // need to handle certain events internally (like skipping stills)
 151     switch (event) {
 152       case DVDNAV_NAV_PACKET:
 153         return event;
 154       case DVDNAV_STILL_FRAME: {
 155         dvdnav_still_skip(priv->dvdnav); // don't let dvdnav stall on this image
 156         break;
 157       }
 158       case DVDNAV_HIGHLIGHT: {
 159         dvdnav_get_highlight (priv, 1);
 160         break;
 161       }
 162       case DVDNAV_CELL_CHANGE: {
 163         dvdnav_cell_change_event_t *ev =  (dvdnav_cell_change_event_t*)buf;
 164         if(ev->pgc_length)
 165           priv->duration = ev->pgc_length/90;
 166         break;
 167       }
 168       case DVDNAV_SPU_CLUT_CHANGE: {
 169         memcpy(priv->spu_clut, buf, 16*sizeof(unsigned int));
 170         priv->spu_set = 1;
 171         break;
 172       }
 173       case DVDNAV_WAIT:
 174         dvdnav_wait_skip(priv->dvdnav);
 175         break;
 176     }
 177
 178     *len=0;
 179   }
 180   return event;
 181 }
 182
 183 static void update_title_len(stream_t *stream) {
 184   dvdnav_priv_t *priv = stream->priv;
 185   dvdnav_status_t status;
 186   uint32_t pos = 0, len = 0;
 187
 188   status = dvdnav_get_position(priv->dvdnav, &pos, &len);
 189   if(status == DVDNAV_STATUS_OK && len) {
 190     stream->end_pos = (off_t) len * 2048;
 191     stream->seek = seek;
 192   } else {
 193     stream->seek = NULL;
 194     stream->end_pos = 0;
 195   }
 196 }
 197
 198
 199 static int seek(stream_t *s, off_t newpos) {
 200   uint32_t sector = 0;
 201   dvdnav_priv_t *priv = s->priv;
 202
 203   if(s->end_pos && newpos > s->end_pos)
 204      newpos = s->end_pos;
 205   sector = newpos / 2048ULL;
 206   if(dvdnav_sector_search(priv->dvdnav, (uint64_t) sector, SEEK_SET) != DVDNAV_STATUS_OK)
 207     goto fail;
 208
 209   s->pos = newpos;
 210
 211   return 1;
 212
 213 fail:
 214   mp_msg(MSGT_STREAM,MSGL_INFO,"dvdnav_stream, seeking to %"PRIu64" failed: %s\n", newpos, dvdnav_err_to_string(priv->dvdnav));
 215
 216   return 1;
 217 }
 218
 219 static void stream_dvdnav_close(stream_t *s) {
 220   dvdnav_priv_t *priv = s->priv;
 221   dvdnav_close(priv->dvdnav);
 222   priv->dvdnav = NULL;
 223   free(priv);
 224 }
 225
 226
 227 static int fill_buffer(stream_t *s, char *but, int len)
 228 {
 229     int event;
 230
 231     dvdnav_priv_t* priv=s->priv;
 232     len=0;
 233     if(!s->end_pos)
 234       update_title_len(s);
 235     while(!len) /* grab all event until DVDNAV_BLOCK_OK (len=2048), DVDNAV_STOP or DVDNAV_STILL_FRAME */
 236     {
 237       event=dvdnav_stream_read(priv, s->buffer, &len);
 238       if(event==-1 || len==-1)
 239       {
 240         mp_msg(MSGT_CPLAYER,MSGL_ERR, "DVDNAV stream read error!\n");
 241         return 0;
 242       }
 243       switch (event) {
 244         case DVDNAV_STOP:
 245         case DVDNAV_BLOCK_OK:
 246         case DVDNAV_NAV_PACKET:
 247           return len;
 248         case DVDNAV_VTS_CHANGE: {
 249           int tit = 0, part = 0;
 250           dvdnav_vts_change_event_t *vts_event = (dvdnav_vts_change_event_t *)s->buffer;
 251           mp_msg(MSGT_CPLAYER,MSGL_INFO, "DVDNAV, switched to title: %d\r\n", vts_event->new_vtsN);
 252           s->end_pos = 0;
 253           update_title_len(s);
 254           if(dvdnav_current_title_info(priv->dvdnav, &tit, &part) == DVDNAV_STATUS_OK) {
 255             mp_msg(MSGT_CPLAYER,MSGL_V, "\r\nDVDNAV, NEW TITLE %d\r\n", tit);
 256             dvdnav_get_highlight (priv, 0);
 257             if(priv->title > 0 && tit != priv->title)
 258               return 0;
 259           }
 260           break;
 261         }
 262         case DVDNAV_CELL_CHANGE: {
 263           if(priv->title > 0 && dvd_last_chapter > 0) {
 264             int tit=0, part=0;
 265             if(dvdnav_current_title_info(priv->dvdnav, &tit, &part) == DVDNAV_STATUS_OK && part > dvd_last_chapter)
 266               return 0;
 267             }
 268         }
 269         break;
 270       }
 271   }
 272   mp_msg(MSGT_STREAM,MSGL_DBG2,"DVDNAV fill_buffer len: %d\n",len);
 273   return len;
 274 }
 275
 276 static int control(stream_t *stream, int cmd, void* arg) {
 277   dvdnav_priv_t* priv=stream->priv;
 278   int tit, part;
 279
 280   switch(cmd)
 281   {
 282     case STREAM_CTRL_SEEK_TO_CHAPTER:
 283     {
 284       int chap = *((unsigned int *)arg)+1;
 285
 286       if(chap < 1 || dvdnav_current_title_info(priv->dvdnav, &tit, &part) != DVDNAV_STATUS_OK)
 287         break;
 288       if(dvdnav_part_play(priv->dvdnav, tit, chap) != DVDNAV_STATUS_OK)
 289         break;
 290       return 1;
 291     }
 292     case STREAM_CTRL_GET_NUM_CHAPTERS:
 293     {
 294       if(dvdnav_current_title_info(priv->dvdnav, &tit, &part) != DVDNAV_STATUS_OK)
 295         break;
 296       if(dvdnav_get_number_of_parts(priv->dvdnav, tit, &part) != DVDNAV_STATUS_OK)
 297         break;
 298       if(!part)
 299         break;
 300       *((unsigned int *)arg) = part;
 301       return 1;
 302     }
 303     case STREAM_CTRL_GET_CURRENT_CHAPTER:
 304     {
 305       if(dvdnav_current_title_info(priv->dvdnav, &tit, &part) != DVDNAV_STATUS_OK)
 306         break;
 307       *((unsigned int *)arg) = part - 1;
 308       return 1;
 309     }
 310     case STREAM_CTRL_GET_TIME_LENGTH:
 311     {
 312       if(priv->duration)
 313       {
 314         *((double *)arg) = (double)priv->duration / 1000.0;
 315         return 1;
 316       }
 317       break;
 318     }
 319     case STREAM_CTRL_GET_ASPECT_RATIO:
 320     {
 321       uint8_t ar = dvdnav_get_video_aspect(priv->dvdnav);
 322       *((double *)arg) = !ar ? 4.0/3.0 : 16.0/9.0;
 323       return 1;
 324     }
 325     case STREAM_CTRL_GET_CURRENT_TIME:
 326     {
 327       double tm;
 328       tm = dvdnav_get_current_time(priv->dvdnav)/90000.0f;
 329       if(tm != -1)
 330       {
 331         *((double *)arg) = tm;
 332         return 1;
 333       }
 334       break;
 335     }
 336     case STREAM_CTRL_SEEK_TO_TIME:
 337     {
 338       uint64_t tm = (uint64_t) (*((double*)arg) * 90000);
 339       if(dvdnav_time_search(priv->dvdnav, tm) == DVDNAV_STATUS_OK)
 340         return 1;
 341       break;
 342     }
 343   }
 344
 345   return STREAM_UNSUPPORTED;
 346 }
 347
 348 static void identify_chapters(dvdnav_t *nav, uint32_t title)
 349 {
 350   uint64_t *parts=NULL, duration=0;
 351   uint32_t n, i, t;
 352   n = dvdnav_describe_title_chapters(nav, title, &parts, &duration);
 353   if(parts) {
 354     t = duration / 90;
 355     mp_msg(MSGT_IDENTIFY, MSGL_V, "ID_DVD_TITLE_%d_LENGTH=%d.%03d\n", title, t / 1000, t % 1000);
 356     mp_msg(MSGT_IDENTIFY, MSGL_INFO, "TITLE %u, CHAPTERS: ", title);
 357     for(i=0; i<n; i++) {
 358       t = parts[i] /  90000;
 359       mp_msg(MSGT_IDENTIFY, MSGL_INFO, "%02d:%02d:%02d,", t/3600, (t/60)%60, t%60);
 360     }
 361     free(parts);
 362     mp_msg(MSGT_IDENTIFY, MSGL_INFO, "\n");
 363   }
 364 }
 365
 366 static void identify(dvdnav_priv_t *priv, struct stream_priv_s *p)
 367 {
 368   uint32_t titles=0, i;
 369   if(p->track <= 0) {
 370     dvdnav_get_number_of_titles(priv->dvdnav, &titles);
 371     for(i=0; i<titles; i++)
 372       identify_chapters(priv->dvdnav, i);
 373   }
 374   else
 375     identify_chapters(priv->dvdnav, p->track);
 376 }
 377
 378 static void show_audio_subs_languages(dvdnav_t *nav)
 379 {
 380   uint8_t lg;
 381   uint16_t i, lang, format, id, channels;
 382   int base[6] = {128, 0, 0, 0, 160, 136, 0};
 383   char tmp[3];
 384   for(i=0; i<8; i++)
 385   {
 386     lg = dvdnav_get_audio_logical_stream(nav, i);
 387     if(lg == 0xff) continue;
 388     channels = dvdnav_audio_stream_channels(nav, lg);
 389     if(channels == 0xFFFF)
 390       channels = 2; //unknown
 391     else
 392       channels--;
 393     lang = dvdnav_audio_stream_to_lang(nav, lg);
 394     if(lang == 0xFFFF)
 395       tmp[0] = tmp[1] = '?';
 396     else
 397     {
 398       tmp[0] = lang >> 8;
 399       tmp[1] = lang & 0xFF;
 400     }
 401     tmp[2] = 0;
 402     format = dvdnav_audio_stream_format(nav, lg);
 403     if(format == 0xFFFF || format > 6)
 404       format = 1; //unknown
 405     id = i + base[format];
 406     mp_msg(MSGT_OPEN,MSGL_STATUS,MSGTR_DVDaudioStreamInfo, i,
 407       dvd_audio_stream_types[format], dvd_audio_stream_channels[channels], tmp, id);
 408   }
 409
 410   for(i=0; i<32; i++)
 411   {
 412     lg = dvdnav_get_spu_logical_stream(nav, i);
 413     if(lg == 0xff) continue;
 414     lang = dvdnav_spu_stream_to_lang(nav, lg);
 415     if(lang == 0xFFFF)
 416       tmp[0] = tmp[1] = '?';
 417     else
 418     {
 419       tmp[0] = lang >> 8;
 420       tmp[1] = lang & 0xFF;
 421     }
 422     tmp[2] = 0;
 423     mp_msg(MSGT_OPEN,MSGL_STATUS,MSGTR_DVDsubtitleLanguage, i+0x20, tmp);
 424   }
 425 }
 426
 427 static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
 428   struct stream_priv_s* p = (struct stream_priv_s*)opts;
 429   char *filename;
 430   dvdnav_priv_t *priv;
 431
 432   if(p->device) filename = p->device;
 433   else if(dvd_device) filename= dvd_device;
 434   else filename = DEFAULT_DVD_DEVICE;
 435   if(!(priv=new_dvdnav_stream(filename))) {
 436     mp_msg(MSGT_OPEN,MSGL_ERR,MSGTR_CantOpenDVD,filename, strerror(errno));
 437     return STREAM_UNSUPPORTED;
 438   }
 439
 440   if(p->track > 0) {
 441     if(dvd_chapter > 0 && dvd_last_chapter > 0 && dvd_chapter > dvd_last_chapter) {
 442       mp_msg(MSGT_OPEN,MSGL_FATAL,"dvdnav_stream, invalid chapter range: %d > %d\n", dvd_chapter, dvd_last_chapter);
 443       return STREAM_UNSUPPORTED;
 444     }
 445     priv->title = p->track;
 446     if(dvdnav_title_play(priv->dvdnav, p->track) != DVDNAV_STATUS_OK) {
 447       mp_msg(MSGT_OPEN,MSGL_FATAL,"dvdnav_stream, couldn't select title %d, error '%s'\n", p->track, dvdnav_err_to_string(priv->dvdnav));
 448       return STREAM_UNSUPPORTED;
 449     }
 450     if(dvd_chapter > 0)
 451       dvdnav_part_play(priv->dvdnav, p->track, dvd_chapter);
 452   } else if(p->track == -1)
 453     dvdnav_menu_call(priv->dvdnav, DVD_MENU_Root);
 454   else {
 455     mp_msg(MSGT_OPEN,MSGL_INFO,"dvdnav_stream, you didn't specify a track number (as in dvdnav://1), playing whole disc\n");
 456     dvdnav_menu_call(priv->dvdnav, DVD_MENU_Title);
 457   }
 458   if(mp_msg_test(MSGT_IDENTIFY, MSGL_INFO))
 459     identify(priv, p);
 460   if(p->track > 0)
 461     show_audio_subs_languages(priv->dvdnav);
 462   if(dvd_angle > 1)
 463     dvdnav_angle_change(priv->dvdnav, dvd_angle);
 464
 465   stream->sector_size = 2048;
 466   stream->flags = STREAM_READ | STREAM_SEEK;
 467   stream->fill_buffer = fill_buffer;
 468   stream->seek = seek;
 469   stream->control = control;
 470   stream->close = stream_dvdnav_close;
 471   stream->type = STREAMTYPE_DVDNAV;
 472   stream->priv=(void*)priv;
 473   *file_format = DEMUXER_TYPE_MPEG_PS;
 474
 475   update_title_len(stream);
 476   if(!stream->pos)
 477     mp_msg(MSGT_OPEN,MSGL_ERR, "INIT ERROR: couldn't get init pos %s\r\n", dvdnav_err_to_string(priv->dvdnav));
 478
 479   mp_msg(MSGT_OPEN,MSGL_INFO, "Remember to disable MPlayer's cache when playing dvdnav:// streams (adding -nocache to your command line)\r\n");
 480
 481   return STREAM_OK;
 482 }
 483
 484
 485 int mp_dvdnav_handle_input(stream_t *stream, int cmd, int *button) {
 486   dvdnav_priv_t * priv=(dvdnav_priv_t*)stream->priv;
 487   dvdnav_t *nav = priv->dvdnav;
 488   dvdnav_status_t status=DVDNAV_STATUS_ERR;
 489   pci_t *pci = dvdnav_get_current_nav_pci(nav);
 490   int reset = 0;
 491
 492   if(cmd != MP_CMD_DVDNAV_SELECT && !pci)
 493     return 0;
 494
 495   switch(cmd) {
 496     case MP_CMD_DVDNAV_UP:
 497       status = dvdnav_upper_button_select(nav, pci);
 498       break;
 499     case MP_CMD_DVDNAV_DOWN:
 500       status = dvdnav_lower_button_select(nav, pci);
 501       break;
 502     case MP_CMD_DVDNAV_LEFT:
 503       status = dvdnav_left_button_select(nav, pci);
 504       break;
 505     case MP_CMD_DVDNAV_RIGHT:
 506       status = dvdnav_right_button_select(nav, pci);
 507       break;
 508     case MP_CMD_DVDNAV_MENU:
 509       status = dvdnav_menu_call(nav,DVD_MENU_Root);
 510       reset = 1;
 511       break;
 512     case MP_CMD_DVDNAV_PREVMENU: {
 513       int title=0, part=0;
 514
 515       dvdnav_current_title_info(nav, &title, &part);
 516       if(title) {
 517         if(dvdnav_menu_call(nav, DVD_MENU_Part) == DVDNAV_STATUS_OK
 518            || dvdnav_menu_call(nav, DVD_MENU_Title) == DVDNAV_STATUS_OK) {
 519           reset = 1;
 520           break;
 521         }
 522       }
 523       if(dvdnav_menu_call(nav, DVD_MENU_Root) == DVDNAV_STATUS_OK)
 524         reset = 1;
 525       }
 526       break;
 527     case MP_CMD_DVDNAV_SELECT:
 528       status = dvdnav_button_activate(nav, pci);
 529       if(status == DVDNAV_STATUS_OK) reset = 1;
 530       break;
 531     case MP_CMD_DVDNAV_MOUSECLICK:
 532       /*
 533         this is a workaround: in theory the simple dvdnav_lower_button_select()+dvdnav_button_activate()
 534         should be enough (and generally it is), but there are cases when the calls to dvdnav_lower_button_select()
 535         and friends fail! Hence we have to call dvdnav_mouse_activate(priv->mousex, priv->mousey) with
 536         the coodinates saved by mp_dvdnav_update_mouse_pos().
 537         This last call always works well
 538       */
 539       status = dvdnav_mouse_activate(nav, pci, priv->mousex, priv->mousey);
 540       if(status == DVDNAV_STATUS_OK) reset = 1;
 541       break;
 542     default:
 543       mp_msg(MSGT_CPLAYER, MSGL_V, "Unknown DVDNAV cmd %d\n", cmd);
 544       break;
 545   }
 546
 547   if(status == DVDNAV_STATUS_OK)
 548     dvdnav_get_current_highlight(nav, button);
 549
 550   return reset;
 551 }
 552
 553 void mp_dvdnav_update_mouse_pos(stream_t *stream, int32_t x, int32_t y, int* button) {
 554   dvdnav_priv_t * priv=(dvdnav_priv_t*)stream->priv;
 555   dvdnav_t *nav = priv->dvdnav;
 556   dvdnav_status_t status;
 557   pci_t *pci = dvdnav_get_current_nav_pci(nav);
 558
 559   if(!pci) return;
 560
 561   status = dvdnav_mouse_select(nav, pci, x, y);
 562   if(status == DVDNAV_STATUS_OK) dvdnav_get_current_highlight(nav, button);
 563   else *button = -1;
 564   priv->mousex = x;
 565   priv->mousey = y;
 566 }
 567
 568 /**
 569  * \brief dvdnav_aid_from_lang() returns the audio id corresponding to the language code 'lang'
 570  * \param stream: - stream pointer
 571  * \param lang: 2-characters language code[s], eventually separated by spaces of commas
 572  * \return -1 on error, current subtitle id if successful
 573  */
 574 int dvdnav_aid_from_lang(stream_t *stream, unsigned char *language) {
 575   dvdnav_priv_t * priv=(dvdnav_priv_t*)stream->priv;
 576   int k;
 577   uint8_t format, lg;
 578   uint16_t lang, lcode;;
 579
 580   while(language && strlen(language)>=2) {
 581     lcode = (language[0] << 8) | (language[1]);
 582     for(k=0; k<32; k++) {
 583       lg = dvdnav_get_audio_logical_stream(priv->dvdnav, k);
 584       if(lg == 0xff) continue;
 585       lang = dvdnav_audio_stream_to_lang(priv->dvdnav, lg);
 586       if(lang != 0xFFFF && lang == lcode) {
 587         format = dvdnav_audio_stream_format(priv->dvdnav, lg);
 588         switch(format) {
 589           case DVDNAV_FORMAT_AC3:
 590             return k+128;
 591           case DVDNAV_FORMAT_DTS:
 592             return k+136;
 593           case DVDNAV_FORMAT_LPCM:
 594             return k+160;
 595           case DVDNAV_FORMAT_MPEGAUDIO:
 596             return k;
 597           default:
 598             return -1;
 599         }
 600       }
 601     }
 602     language += 2;
 603     while(language[0]==',' || language[0]==' ') ++language;
 604   }
 605   return -1;
 606 }
 607
 608 /**
 609  * \brief dvdnav_lang_from_aid() assigns to buf the language corresponding to audio id 'aid'
 610  * \param stream: - stream pointer
 611  * \param sid: physical subtitle id
 612  * \param buf: buffer to contain the 2-chars language string
 613  * \return 0 on error, 1 if successful
 614  */
 615 int dvdnav_lang_from_aid(stream_t *stream, int aid, unsigned char *buf) {
 616   uint8_t lg;
 617   uint16_t lang;
 618   dvdnav_priv_t * priv=(dvdnav_priv_t*)stream->priv;
 619
 620   if(aid < 0)
 621     return 0;
 622   lg = dvdnav_get_audio_logical_stream(priv->dvdnav, aid & 0x7);
 623   if(lg == 0xff) return 0;
 624   lang = dvdnav_audio_stream_to_lang(priv->dvdnav, lg);
 625   if(lang == 0xffff) return 0;
 626   buf[0] = lang >> 8;
 627   buf[1] = lang & 0xFF;
 628   buf[2] = 0;
 629   return 1;
 630 }
 631
 632
 633 /**
 634  * \brief dvdnav_sid_from_lang() returns the subtitle id corresponding to the language code 'lang'
 635  * \param stream: - stream pointer
 636  * \param lang: 2-characters language code[s], eventually separated by spaces of commas
 637  * \return -1 on error, current subtitle id if successful
 638  */
 639 int dvdnav_sid_from_lang(stream_t *stream, unsigned char *language) {
 640   dvdnav_priv_t * priv=(dvdnav_priv_t*)stream->priv;
 641   uint8_t lg, k;
 642   uint16_t lang, lcode;
 643
 644   while(language && strlen(language)>=2) {
 645     lcode = (language[0] << 8) | (language[1]);
 646     for(k=0; k<32; k++) {
 647       lg = dvdnav_get_spu_logical_stream(priv->dvdnav, k);
 648       if(lg == 0xff) continue;
 649       lang = dvdnav_spu_stream_to_lang(priv->dvdnav, lg);
 650       if(lang != 0xFFFF && lang == lcode) {
 651         return k;
 652       }
 653     }
 654     language += 2;
 655     while(language[0]==',' || language[0]==' ') ++language;
 656   }
 657   return -1;
 658 }
 659
 660 /**
 661  * \brief dvdnav_lang_from_sid() assigns to buf the language corresponding to subtitle id 'sid'
 662  * \param stream: - stream pointer
 663  * \param sid: physical subtitle id
 664  * \param buf: buffer to contain the 2-chars language string
 665  * \return 0 on error, 1 if successful
 666  */
 667 int dvdnav_lang_from_sid(stream_t *stream, int sid, unsigned char *buf) {
 668     uint8_t lg;
 669     uint16_t lang;
 670     dvdnav_priv_t *priv=(dvdnav_priv_t*)stream->priv;
 671     if(sid < 0) return 0;
 672     lg = dvdnav_get_spu_logical_stream(priv->dvdnav, sid);
 673     lang = dvdnav_spu_stream_to_lang(priv->dvdnav, lg);
 674     if(lang == 0xffff) return 0;
 675     buf[0] = lang >> 8;
 676     buf[1] = lang & 0xFF;
 677     buf[2] = 0;
 678     return 1;
 679 }
 680
 681 /**
 682  * \brief dvdnav_number_of_subs() returns the count of available subtitles
 683  * \param stream: - stream pointer
 684  * \return 0 on error, something meaningful otherwise
 685  */
 686 int dvdnav_number_of_subs(stream_t *stream) {
 687   dvdnav_priv_t * priv=(dvdnav_priv_t*)stream->priv;
 688   uint8_t lg, k, n=0;
 689
 690   for(k=0; k<32; k++) {
 691     lg = dvdnav_get_spu_logical_stream(priv->dvdnav, k);
 692     if(lg == 0xff) continue;
 693     n++;
 694   }
 695   return n;
 696 }
 697
 698 /**
 699  * \brief mp_dvdnav_get_spu_clut() returns the spu clut
 700  * \param stream: - stream pointer
 701  * \return spu clut pointer
 702  */
 703 unsigned int *mp_dvdnav_get_spu_clut(stream_t *stream) {
 704     dvdnav_priv_t *priv=(dvdnav_priv_t*)stream->priv;
 705     if(!priv->spu_set) return NULL;
 706     return priv->spu_clut;
 707 }
 708
 709 /**
 710  * \brief mp_dvdnav_get_highlight() get dvdnav highlight struct
 711  * \param stream: - stream pointer
 712  * \param hl    : - highlight struct pointer
 713  */
 714 void mp_dvdnav_get_highlight (stream_t *stream, nav_highlight_t *hl) {
 715   dvdnav_priv_t *priv = (dvdnav_priv_t *) stream->priv;
 716   dvdnav_highlight_event_t hlev = priv->hlev;
 717
 718   hl->sx = hlev.sx;
 719   hl->sy = hlev.sy;
 720   hl->ex = hlev.ex;
 721   hl->ey = hlev.ey;
 722 }
 723
 724 const stream_info_t stream_info_dvdnav = {
 725   "DVDNAV stream",
 726   "null",
 727   "",
 728   "",
 729   open_s,
 730   { "dvdnav", NULL },
 731   &stream_opts,
 732   1 // Urls are an option string
 733 };