git.sesse.net Git - vlc/blob - modules/demux/playlist/xspf.c

   1 /*******************************************************************************
   2  * xspf.c : XSPF playlist import functions
   3  *******************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Daniel Stränger <vlc at schmaller dot de>
   8  *          Yoann Peronneau <yoann@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  ******************************************************************************/
  24 /**
  25  * \file modules/demux/playlist/xspf.c
  26  * \brief XSPF playlist import functions
  27  */
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_demux.h>
  35
  36 #include <vlc_xml.h>
  37 #include <vlc_strings.h>
  38 #include <vlc_url.h>
  39 #include "xspf.h"
  40 #include "playlist.h"
  41
  42 struct demux_sys_t
  43 {
  44     input_item_t **pp_tracklist;
  45     int i_tracklist_entries;
  46     int i_track_id;
  47     char * psz_base;
  48 };
  49
  50 static int Control( demux_t *, int, va_list );
  51 static int Demux( demux_t * );
  52
  53 /**
  54  * \brief XSPF submodule initialization function
  55  */
  56 int Import_xspf( vlc_object_t *p_this )
  57 {
  58     DEMUX_BY_EXTENSION_OR_FORCED_MSG( ".xspf", "xspf-open",
  59                                       "using XSPF playlist reader" );
  60     return VLC_SUCCESS;
  61 }
  62
  63 void Close_xspf( vlc_object_t *p_this )
  64 {
  65     demux_t *p_demux = (demux_t *)p_this;
  66     demux_sys_t *p_sys = p_demux->p_sys;
  67     for( int i = 0; i < p_sys->i_tracklist_entries; i++ )
  68     {
  69         if( p_sys->pp_tracklist[i] )
  70             vlc_gc_decref( p_sys->pp_tracklist[i] );
  71     }
  72     free( p_sys->pp_tracklist );
  73     free( p_sys->psz_base );
  74     free( p_sys );
  75 }
  76
  77 /**
  78  * \brief demuxer function for XSPF parsing
  79  */
  80 int Demux( demux_t *p_demux )
  81 {
  82     int i_ret = -1;
  83     xml_reader_t *p_xml_reader = NULL;
  84     char *psz_name = NULL;
  85     input_item_t *p_current_input = GetCurrentItem(p_demux);
  86     p_demux->p_sys->pp_tracklist = NULL;
  87     p_demux->p_sys->i_tracklist_entries = 0;
  88     p_demux->p_sys->i_track_id = -1;
  89     p_demux->p_sys->psz_base = NULL;
  90
  91     /* create new xml parser from stream */
  92     p_xml_reader = xml_ReaderCreate( p_demux, p_demux->s );
  93     if( !p_xml_reader )
  94         goto end;
  95
  96     /* locating the root node */
  97     do
  98     {
  99         if( xml_ReaderRead( p_xml_reader ) != 1 )
 100         {
 101             msg_Err( p_demux, "can't read xml stream" );
 102             goto end;
 103         }
 104     } while( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM );
 105
 106     /* checking root node name */
 107     psz_name = xml_ReaderName( p_xml_reader );
 108     if( !psz_name || strcmp( psz_name, "playlist" ) )
 109     {
 110         msg_Err( p_demux, "invalid root node name: %s", psz_name );
 111         free( psz_name );
 112         goto end;
 113     }
 114     free( psz_name );
 115
 116     input_item_node_t *p_subitems =
 117         input_item_node_Create( p_current_input );
 118
 119     i_ret = parse_playlist_node( p_demux, p_subitems,
 120                                  p_xml_reader, "playlist" ) ? 0 : -1;
 121
 122     for( int i = 0 ; i < p_demux->p_sys->i_tracklist_entries ; i++ )
 123     {
 124         input_item_t *p_new_input = p_demux->p_sys->pp_tracklist[i];
 125         if( p_new_input )
 126         {
 127             input_item_node_AppendItem( p_subitems, p_new_input );
 128         }
 129     }
 130
 131     input_item_node_PostAndDelete( p_subitems );
 132
 133 end:
 134     vlc_gc_decref(p_current_input);
 135     if( p_xml_reader )
 136         xml_ReaderDelete( p_xml_reader );
 137     return i_ret; /* Needed for correct operation of go back */
 138 }
 139
 140 /** \brief dummy function for demux callback interface */
 141 static int Control( demux_t *p_demux, int i_query, va_list args )
 142 {
 143     VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
 144     return VLC_EGENERIC;
 145 }
 146
 147 /**
 148  * \brief parse the root node of a XSPF playlist
 149  * \param p_demux demuxer instance
 150  * \param p_input_item current input item
 151  * \param p_xml_reader xml reader instance
 152  * \param psz_element name of element to parse
 153  */
 154 static bool parse_playlist_node COMPLEX_INTERFACE
 155 {
 156     input_item_t *p_input_item = p_input_node->p_item;
 157     char *psz_name = NULL;
 158     char *psz_value = NULL;
 159     bool b_version_found = false;
 160     int i_node;
 161     bool b_ret = false;
 162     xml_elem_hnd_t *p_handler = NULL;
 163
 164     xml_elem_hnd_t pl_elements[] =
 165         { {"title",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 166           {"creator",      SIMPLE_CONTENT,  {.smpl = set_item_info} },
 167           {"annotation",   SIMPLE_CONTENT,  {.smpl = set_item_info} },
 168           {"info",         SIMPLE_CONTENT,  {NULL} },
 169           {"location",     SIMPLE_CONTENT,  {NULL} },
 170           {"identifier",   SIMPLE_CONTENT,  {NULL} },
 171           {"image",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 172           {"date",         SIMPLE_CONTENT,  {NULL} },
 173           {"license",      SIMPLE_CONTENT,  {NULL} },
 174           {"attribution",  COMPLEX_CONTENT, {.cmplx = skip_element} },
 175           {"link",         SIMPLE_CONTENT,  {NULL} },
 176           {"meta",         SIMPLE_CONTENT,  {NULL} },
 177           {"extension",    COMPLEX_CONTENT, {.cmplx = parse_extension_node} },
 178           {"trackList",    COMPLEX_CONTENT, {.cmplx = parse_tracklist_node} },
 179           {NULL,           UNKNOWN_CONTENT, {NULL} }
 180         };
 181
 182     /* read all playlist attributes */
 183     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 184     {
 185         psz_name = xml_ReaderName( p_xml_reader );
 186         psz_value = xml_ReaderValue( p_xml_reader );
 187         if( !psz_name || !psz_value )
 188         {
 189             msg_Err( p_demux, "invalid xml stream @ <playlist>" );
 190             goto end;
 191         }
 192         /* attribute: version */
 193         if( !strcmp( psz_name, "version" ) )
 194         {
 195             b_version_found = true;
 196             if( strcmp( psz_value, "0" ) && strcmp( psz_value, "1" ) )
 197                 msg_Warn( p_demux, "unsupported XSPF version" );
 198         }
 199         /* attribute: xmlns */
 200         else if( !strcmp( psz_name, "xmlns" ) || !strcmp( psz_name, "xmlns:vlc" ) )
 201             ;
 202         else if( !strcmp( psz_name, "xml:base" ) )
 203         {
 204             p_demux->p_sys->psz_base = strdup( psz_value );
 205         }
 206         /* unknown attribute */
 207         else
 208             msg_Warn( p_demux, "invalid <playlist> attribute:\"%s\"", psz_name);
 209
 210         free( psz_name );
 211         free( psz_value );
 212     }
 213     /* attribute version is mandatory !!! */
 214     if( !b_version_found )
 215         msg_Warn( p_demux, "<playlist> requires \"version\" attribute" );
 216
 217     /* parse the child elements - we only take care of <trackList> */
 218     psz_name = NULL;
 219     psz_value = NULL;
 220     while( xml_ReaderRead( p_xml_reader ) == 1 )
 221     {
 222         i_node = xml_ReaderNodeType( p_xml_reader );
 223         switch( i_node )
 224         {
 225             case XML_READER_NONE:
 226                 break;
 227             case XML_READER_STARTELEM:
 228                 /*  element start tag  */
 229                 psz_name = xml_ReaderName( p_xml_reader );
 230                 if( !psz_name || !*psz_name )
 231                 {
 232                     msg_Err( p_demux, "invalid xml stream" );
 233                     goto end;
 234                 }
 235                 /* choose handler */
 236                 for( p_handler = pl_elements;
 237                      p_handler->name && strcmp( psz_name, p_handler->name );
 238                      p_handler++ );
 239                 if( !p_handler->name )
 240                 {
 241                     msg_Err( p_demux, "unexpected element <%s>", psz_name );
 242                     goto end;
 243                 }
 244                 FREE_NAME();
 245                 /* complex content is parsed in a separate function */
 246                 if( p_handler->type == COMPLEX_CONTENT )
 247                 {
 248                     FREE_VALUE();
 249                     if( p_handler->pf_handler.cmplx( p_demux,
 250                                                      p_input_node,
 251                                                      p_xml_reader,
 252                                                      p_handler->name ) )
 253                     {
 254                         p_handler = NULL;
 255                     }
 256                     else
 257                     {
 258                         return false;
 259                     }
 260                 }
 261                 break;
 262
 263             case XML_READER_TEXT:
 264                 /* simple element content */
 265                 free( psz_value );
 266                 psz_value = xml_ReaderValue( p_xml_reader );
 267                 if( !psz_value )
 268                 {
 269                     msg_Err( p_demux, "invalid xml stream" );
 270                     goto end;
 271                 }
 272                 break;
 273
 274             case XML_READER_ENDELEM:
 275                 /* element end tag */
 276                 psz_name = xml_ReaderName( p_xml_reader );
 277                 if( !psz_name )
 278                 {
 279                     msg_Err( p_demux, "invalid xml stream" );
 280                     goto end;
 281                 }
 282                 /* leave if the current parent node <playlist> is terminated */
 283                 if( !strcmp( psz_name, psz_element ) )
 284                 {
 285                     b_ret = true;
 286                     goto end;
 287                 }
 288                 /* there MUST have been a start tag for that element name */
 289                 if( !p_handler || !p_handler->name
 290                     || strcmp( p_handler->name, psz_name ))
 291                 {
 292                     msg_Err( p_demux, "there's no open element left for <%s>",
 293                              psz_name );
 294                     goto end;
 295                 }
 296
 297                 if( p_handler->pf_handler.smpl )
 298                 {
 299                     p_handler->pf_handler.smpl( p_input_item, p_handler->name,
 300                                                 psz_value );
 301                 }
 302                 FREE_ATT();
 303                 p_handler = NULL;
 304                 break;
 305
 306             default:
 307                 /* unknown/unexpected xml node */
 308                 msg_Err( p_demux, "unexpected xml node %i", i_node );
 309                 goto end;
 310         }
 311     }
 312
 313 end:
 314     free( psz_name );
 315     free( psz_value );
 316     return b_ret;
 317 }
 318
 319 /**
 320  * \brief parses the tracklist node which only may contain <track>s
 321  */
 322 static bool parse_tracklist_node COMPLEX_INTERFACE
 323 {
 324     VLC_UNUSED(psz_element);
 325     char *psz_name;
 326     int i_ntracks = 0;
 327
 328     /* now parse the <track>s */
 329     while( xml_ReaderRead( p_xml_reader ) == 1 )
 330     {
 331         int i_node = xml_ReaderNodeType( p_xml_reader );
 332         if( i_node == XML_READER_STARTELEM )
 333         {
 334             char *psz_eltname = xml_ReaderName( p_xml_reader );
 335             if( !psz_eltname )
 336             {
 337                 msg_Err( p_demux, "unexpected end of xml data" );
 338                 free( psz_eltname );
 339                 return false;
 340             }
 341             if( strcmp( psz_eltname, "track") )
 342             {
 343                 msg_Err( p_demux, "unexpected child of <trackList>: <%s>",
 344                          psz_eltname );
 345                 free( psz_eltname );
 346                 return false;
 347             }
 348             free( psz_eltname );
 349
 350             /* parse the track data in a separate function */
 351             if( parse_track_node( p_demux, p_input_node,
 352                                   p_xml_reader, "track" ) )
 353                 i_ntracks++;
 354         }
 355         else if( i_node == XML_READER_ENDELEM )
 356             break;
 357     }
 358
 359     /* the <trackList> has to be terminated */
 360     if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_ENDELEM )
 361     {
 362         msg_Err( p_demux, "there's a missing </trackList>" );
 363         return false;
 364     }
 365     psz_name = xml_ReaderName( p_xml_reader );
 366     if( !psz_name || strcmp( psz_name, "trackList" ) )
 367     {
 368         msg_Err( p_demux, "expected: </trackList>, found: </%s>", psz_name );
 369         free( psz_name );
 370         return false;
 371     }
 372     free( psz_name );
 373
 374     msg_Dbg( p_demux, "parsed %i tracks successfully", i_ntracks );
 375     return true;
 376 }
 377
 378 /**
 379  * \brief parse one track element
 380  * \param COMPLEX_INTERFACE
 381  */
 382 static bool parse_track_node COMPLEX_INTERFACE
 383 {
 384     input_item_t *p_input_item = p_input_node->p_item;
 385     char *psz_name = NULL;
 386     char *psz_value = NULL;
 387     xml_elem_hnd_t *p_handler = NULL;
 388     demux_sys_t *p_sys = p_demux->p_sys;
 389     bool b_ret = false;
 390
 391     xml_elem_hnd_t track_elements[] =
 392         { {"location",     SIMPLE_CONTENT,  {NULL} },
 393           {"identifier",   SIMPLE_CONTENT,  {NULL} },
 394           {"title",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 395           {"creator",      SIMPLE_CONTENT,  {.smpl = set_item_info} },
 396           {"annotation",   SIMPLE_CONTENT,  {.smpl = set_item_info} },
 397           {"info",         SIMPLE_CONTENT,  {NULL} },
 398           {"image",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 399           {"album",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 400           {"trackNum",     SIMPLE_CONTENT,  {.smpl = set_item_info} },
 401           {"duration",     SIMPLE_CONTENT,  {.smpl = set_item_info} },
 402           {"link",         SIMPLE_CONTENT,  {NULL} },
 403           {"meta",         SIMPLE_CONTENT,  {NULL} },
 404           {"extension",    COMPLEX_CONTENT, {.cmplx = parse_extension_node} },
 405           {NULL,           UNKNOWN_CONTENT, {NULL} }
 406         };
 407
 408     input_item_t *p_new_input = input_item_New( p_demux, NULL, NULL );
 409     input_item_node_t *p_new_node = input_item_node_Create( p_new_input );
 410
 411     if( !p_new_input )
 412     {
 413         /* malloc has failed for input_item_New, so bailout early */
 414         return false;
 415     }
 416
 417     /* reset i_track_id */
 418     p_sys->i_track_id = -1;
 419
 420     while( xml_ReaderRead( p_xml_reader ) == 1 )
 421     {
 422         int i_node = xml_ReaderNodeType( p_xml_reader );
 423         switch( i_node )
 424         {
 425             case XML_READER_NONE:
 426                 break;
 427
 428             case XML_READER_STARTELEM:
 429                 /*  element start tag  */
 430                 psz_name = xml_ReaderName( p_xml_reader );
 431                 if( !psz_name || !*psz_name )
 432                 {
 433                     msg_Err( p_demux, "invalid xml stream" );
 434                     goto end;
 435                 }
 436                 /* choose handler */
 437                 for( p_handler = track_elements;
 438                      p_handler->name && strcmp( psz_name, p_handler->name );
 439                      p_handler++ );
 440                 if( !p_handler->name )
 441                 {
 442                     msg_Err( p_demux, "unexpected element <%s>", psz_name );
 443                     goto end;
 444                 }
 445                 FREE_NAME();
 446                 /* complex content is parsed in a separate function */
 447                 if( p_handler->type == COMPLEX_CONTENT )
 448                 {
 449                     FREE_VALUE();
 450
 451                     bool b_res = p_handler->pf_handler.cmplx( p_demux,
 452                                                         p_new_node,
 453                                                         p_xml_reader,
 454                                                         p_handler->name );
 455                     if( b_res )
 456                     {
 457                         p_handler = NULL;
 458                     }
 459                     else
 460                     {
 461                         return false;
 462                     }
 463                 }
 464                 break;
 465
 466             case XML_READER_TEXT:
 467                 /* simple element content */
 468                 free( psz_value );
 469                 psz_value = xml_ReaderValue( p_xml_reader );
 470                 if( !psz_value )
 471                 {
 472                     msg_Err( p_demux, "invalid xml stream" );
 473                     goto end;
 474                 }
 475                 break;
 476
 477             case XML_READER_ENDELEM:
 478                 /* element end tag */
 479                 psz_name = xml_ReaderName( p_xml_reader );
 480                 if( !psz_name )
 481                 {
 482                     msg_Err( p_demux, "invalid xml stream" );
 483                     goto end;
 484                 }
 485
 486                 /* leave if the current parent node <track> is terminated */
 487                 if( !strcmp( psz_name, psz_element ) )
 488                 {
 489                     free( psz_name );
 490                     free( psz_value );
 491
 492                     /* Make sure we have a URI */
 493                     char *psz_uri = input_item_GetURI( p_new_input );
 494                     if( !psz_uri )
 495                     {
 496                         input_item_SetURI( p_new_input, "vlc://nop" );
 497                     }
 498                     free( psz_uri );
 499
 500                     if( p_sys->i_track_id < 0 )
 501                     {
 502                         input_item_node_AppendNode( p_input_node, p_new_node );
 503                         vlc_gc_decref( p_new_input );
 504                         return true;
 505                     }
 506
 507                     if( p_sys->i_track_id >= p_sys->i_tracklist_entries )
 508                     {
 509                         input_item_t **pp;
 510                         pp = realloc( p_sys->pp_tracklist,
 511                             (p_sys->i_track_id + 1) * sizeof(*pp) );
 512                         if( !pp )
 513                             return false;
 514                         p_sys->pp_tracklist = pp;
 515                         while( p_sys->i_track_id >= p_sys->i_tracklist_entries )
 516                             pp[p_sys->i_tracklist_entries++] = NULL;
 517                     }
 518
 519                     p_sys->pp_tracklist[ p_sys->i_track_id ] = p_new_input;
 520                     return true;
 521                 }
 522                 /* there MUST have been a start tag for that element name */
 523                 if( !p_handler || !p_handler->name
 524                     || strcmp( p_handler->name, psz_name ))
 525                 {
 526                     msg_Err( p_demux, "there's no open element left for <%s>",
 527                              psz_name );
 528                     goto end;
 529                 }
 530
 531                 /* special case: location */
 532                 if( !strcmp( p_handler->name, "location" ) )
 533                 {
 534                     if( psz_value == NULL )
 535                         input_item_SetURI( p_new_input, "vlc://nop" );
 536                     else
 537                     /* FIXME: This is broken. Scheme-relative (//...) locations
 538                      * and anchors (#...) are not resolved correctly. Also,
 539                      * host-relative (/...) and directory-relative locations
 540                      * ("relative path" in vernacular) should be resolved.
 541                      * Last, psz_base should default to the XSPF resource
 542                      * location if missing (not the current working directory).
 543                      * -- Courmisch */
 544                     if( p_sys->psz_base && !strstr( psz_value, "://" ) )
 545                     {
 546                         char* psz_tmp;
 547                         if( asprintf( &psz_tmp, "%s%s", p_sys->psz_base,
 548                                       psz_value ) == -1 )
 549                         {
 550                             goto end;
 551                         }
 552                         input_item_SetURI( p_new_input, psz_tmp );
 553                         free( psz_tmp );
 554                     }
 555                     else
 556                         input_item_SetURI( p_new_input, psz_value );
 557                     input_item_CopyOptions( p_input_item, p_new_input );
 558                 }
 559                 else
 560                 {
 561                     /* there MUST be an item */
 562                     if( p_handler->pf_handler.smpl )
 563                     {
 564                         p_handler->pf_handler.smpl( p_new_input,
 565                                                     p_handler->name,
 566                                                     psz_value );
 567                         FREE_ATT();
 568                     }
 569                 }
 570                 FREE_ATT();
 571                 p_handler = NULL;
 572                 break;
 573
 574             default:
 575                 /* unknown/unexpected xml node */
 576                 msg_Err( p_demux, "unexpected xml node %i", i_node );
 577                 goto end;
 578         }
 579     }
 580     msg_Err( p_demux, "unexpected end of xml data" );
 581
 582 end:
 583     free( psz_name );
 584     free( psz_value );
 585     return b_ret;
 586 }
 587
 588 /**
 589  * \brief handles the supported <track> sub-elements
 590  */
 591 static bool set_item_info SIMPLE_INTERFACE
 592 {
 593     /* exit if setting is impossible */
 594     if( !psz_name || !psz_value || !p_input )
 595         return false;
 596
 597     /* re-convert xml special characters inside psz_value */
 598     resolve_xml_special_chars( psz_value );
 599
 600     /* handle each info element in a separate "if" clause */
 601     if( !strcmp( psz_name, "title" ) )
 602     {
 603         input_item_SetTitle( p_input, psz_value );
 604     }
 605     else if( !strcmp( psz_name, "creator" ) )
 606     {
 607         input_item_SetArtist( p_input, psz_value );
 608     }
 609     else if( !strcmp( psz_name, "album" ) )
 610     {
 611         input_item_SetAlbum( p_input, psz_value );
 612
 613     }
 614     else if( !strcmp( psz_name, "trackNum" ) )
 615     {
 616         input_item_SetTrackNum( p_input, psz_value );
 617     }
 618     else if( !strcmp( psz_name, "duration" ) )
 619     {
 620         long i_num = atol( psz_value );
 621         input_item_SetDuration( p_input, (mtime_t) i_num*1000 );
 622     }
 623     else if( !strcmp( psz_name, "annotation" ) )
 624     {
 625         input_item_SetDescription( p_input, psz_value );
 626     }
 627     else if( !strcmp( psz_name, "image" ) )
 628     {
 629         input_item_SetArtURL( p_input, psz_value );
 630     }
 631     return true;
 632 }
 633
 634 /**
 635  * \brief handles the <vlc:option> elements
 636  */
 637 static bool set_option SIMPLE_INTERFACE
 638 {
 639     /* exit if setting is impossible */
 640     if( !psz_name || !psz_value || !p_input )
 641         return false;
 642
 643     /* re-convert xml special characters inside psz_value */
 644     resolve_xml_special_chars( psz_value );
 645
 646     input_item_AddOption( p_input, psz_value, 0 );
 647
 648     return true;
 649 }
 650
 651 /**
 652  * \brief parse the extension node of a XSPF playlist
 653  */
 654 static bool parse_extension_node COMPLEX_INTERFACE
 655 {
 656     input_item_t *p_input_item = p_input_node->p_item;
 657     char *psz_name = NULL;
 658     char *psz_value = NULL;
 659     char *psz_title = NULL;
 660     char *psz_application = NULL;
 661     int i_node;
 662     bool b_release_input_item = false;
 663     xml_elem_hnd_t *p_handler = NULL;
 664     input_item_t *p_new_input = NULL;
 665
 666     xml_elem_hnd_t pl_elements[] =
 667         { {"vlc:node",   COMPLEX_CONTENT, {.cmplx = parse_extension_node} },
 668           {"vlc:item",   COMPLEX_CONTENT, {.cmplx = parse_extitem_node} },
 669           {"vlc:id",     SIMPLE_CONTENT, {NULL} },
 670           {"vlc:option", SIMPLE_CONTENT, {.smpl = set_option} },
 671           {NULL,    UNKNOWN_CONTENT, {NULL} }
 672         };
 673
 674     /* read all extension node attributes */
 675     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 676     {
 677         psz_name = xml_ReaderName( p_xml_reader );
 678         psz_value = xml_ReaderValue( p_xml_reader );
 679         if( !psz_name || !psz_value )
 680         {
 681             msg_Err( p_demux, "invalid xml stream @ <vlc:node>" );
 682             FREE_ATT();
 683             return false;
 684         }
 685         /* attribute: title */
 686         if( !strcmp( psz_name, "title" ) )
 687         {
 688             resolve_xml_special_chars( psz_value );
 689             psz_title = psz_value;
 690         }
 691         /* extension attribute: application */
 692         else if( !strcmp( psz_name, "application" ) )
 693         {
 694             psz_application = psz_value;
 695         }
 696         /* unknown attribute */
 697         else
 698         {
 699             msg_Warn( p_demux, "invalid <%s> attribute:\"%s\"", psz_element,
 700                       psz_name );
 701             FREE_VALUE();
 702         }
 703         FREE_NAME();
 704         psz_value = NULL;
 705     }
 706
 707     /* attribute title is mandatory except for <extension> */
 708     if( !strcmp( psz_element, "vlc:node" ) )
 709     {
 710         if( !psz_title )
 711         {
 712             msg_Warn( p_demux, "<vlc:node> requires \"title\" attribute" );
 713             return false;
 714         }
 715         p_new_input = input_item_NewWithType( VLC_OBJECT( p_demux ),
 716                           "vlc://nop", psz_title, 0, NULL, 0, -1,
 717                           ITEM_TYPE_DIRECTORY );
 718         if( p_new_input )
 719         {
 720             p_input_node =
 721                 input_item_node_AppendItem( p_input_node, p_new_input );
 722             p_input_item = p_new_input;
 723             b_release_input_item = true;
 724         }
 725         free( psz_title );
 726     }
 727     else if( !strcmp( psz_element, "extension" ) )
 728     {
 729         if( !psz_application )
 730         {
 731             msg_Warn( p_demux, "<extension> requires \"application\" attribute" );
 732             return false;
 733         }
 734         /* Skip the extension if the application is not vlc
 735            This will skip all children of the current node */
 736         else if( strcmp( psz_application, "http://www.videolan.org/vlc/playlist/0" ) )
 737         {
 738             msg_Dbg( p_demux, "Skipping \"%s\" extension tag", psz_application );
 739             free( psz_application );
 740             /* Skip all children */
 741             while( xml_ReaderRead( p_xml_reader ) == 1 )
 742             {
 743                 if( xml_ReaderNodeType( p_xml_reader ) == XML_READER_ENDELEM )
 744                 {
 745                     char *psz_name = xml_ReaderName( p_xml_reader );
 746                     if( !strcmp( psz_name, "extension" ) )
 747                     {
 748                         free( psz_name );
 749                         break;
 750                     }
 751                     msg_Dbg( p_demux, "\tskipping \"%s\" extension child", psz_name );
 752                     free( psz_name );
 753                 }
 754             }
 755             return true;
 756         }
 757     }
 758     free( psz_application );
 759
 760
 761     /* parse the child elements */
 762     while( xml_ReaderRead( p_xml_reader ) == 1 )
 763     {
 764         i_node = xml_ReaderNodeType( p_xml_reader );
 765         switch( i_node )
 766         {
 767             case XML_READER_NONE:
 768                 break;
 769             case XML_READER_STARTELEM:
 770                 /*  element start tag  */
 771                 psz_name = xml_ReaderName( p_xml_reader );
 772                 if( !psz_name || !*psz_name )
 773                 {
 774                     msg_Err( p_demux, "invalid xml stream" );
 775                     FREE_ATT();
 776                     if( b_release_input_item ) vlc_gc_decref( p_new_input );
 777                     return false;
 778                 }
 779                 /* choose handler */
 780                 for( p_handler = pl_elements;
 781                      p_handler->name && strcmp( psz_name, p_handler->name );
 782                      p_handler++ );
 783                 if( !p_handler->name )
 784                 {
 785                     msg_Err( p_demux, "unexpected element <%s>", psz_name );
 786                     FREE_ATT();
 787                     if( b_release_input_item ) vlc_gc_decref( p_new_input );
 788                     return false;
 789                 }
 790                 FREE_NAME();
 791                 /* complex content is parsed in a separate function */
 792                 if( p_handler->type == COMPLEX_CONTENT )
 793                 {
 794                     if( p_handler->pf_handler.cmplx( p_demux,
 795                                                      p_input_node,
 796                                                      p_xml_reader,
 797                                                      p_handler->name ) )
 798                     {
 799                         p_handler = NULL;
 800                         FREE_ATT();
 801                     }
 802                     else
 803                     {
 804                         FREE_ATT();
 805                         if( b_release_input_item ) vlc_gc_decref( p_new_input );
 806                         return false;
 807                     }
 808                 }
 809                 break;
 810
 811             case XML_READER_TEXT:
 812                 /* simple element content */
 813                 FREE_ATT();
 814                 psz_value = xml_ReaderValue( p_xml_reader );
 815                 if( !psz_value )
 816                 {
 817                     msg_Err( p_demux, "invalid xml stream" );
 818                     FREE_ATT();
 819                     if( b_release_input_item ) vlc_gc_decref( p_new_input );
 820                     return false;
 821                 }
 822                 break;
 823
 824             case XML_READER_ENDELEM:
 825                 /* element end tag */
 826                 psz_name = xml_ReaderName( p_xml_reader );
 827                 if( !psz_name )
 828                 {
 829                     msg_Err( p_demux, "invalid xml stream" );
 830                     FREE_ATT();
 831                     if( b_release_input_item ) vlc_gc_decref( p_new_input );
 832                     return false;
 833                 }
 834                 /* leave if the current parent node is terminated */
 835                 if( !strcmp( psz_name, psz_element ) )
 836                 {
 837                     FREE_ATT();
 838                     if( b_release_input_item ) vlc_gc_decref( p_new_input );
 839                     return true;
 840                 }
 841                 /* there MUST have been a start tag for that element name */
 842                 if( !p_handler || !p_handler->name
 843                     || strcmp( p_handler->name, psz_name ))
 844                 {
 845                     msg_Err( p_demux, "there's no open element left for <%s>",
 846                              psz_name );
 847                     FREE_ATT();
 848                     if( b_release_input_item ) vlc_gc_decref( p_new_input );
 849                     return false;
 850                 }
 851
 852                 /* special tag <vlc:id> */
 853                 if( !strcmp( p_handler->name, "vlc:id" ) )
 854                 {
 855                     p_demux->p_sys->i_track_id = atoi( psz_value );
 856                 }
 857                 else if( p_handler->pf_handler.smpl )
 858                 {
 859                     p_handler->pf_handler.smpl( p_input_item, p_handler->name,
 860                                                 psz_value );
 861                 }
 862                 FREE_ATT();
 863                 p_handler = NULL;
 864                 break;
 865
 866             default:
 867                 /* unknown/unexpected xml node */
 868                 msg_Err( p_demux, "unexpected xml node %i", i_node );
 869                 FREE_ATT();
 870                 if( b_release_input_item ) vlc_gc_decref( p_new_input );
 871                 return false;
 872         }
 873         FREE_NAME();
 874     }
 875     if( b_release_input_item ) vlc_gc_decref( p_new_input );
 876     return false;
 877 }
 878
 879 /**
 880  * \brief parse the extension item node of a XSPF playlist
 881  */
 882 static bool parse_extitem_node COMPLEX_INTERFACE
 883 {
 884     VLC_UNUSED(psz_element);
 885     input_item_t *p_new_input = NULL;
 886     int i_tid = -1;
 887
 888     /* read all extension item attributes */
 889     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 890     {
 891         char *psz_name = xml_ReaderName( p_xml_reader );
 892         char *psz_value = xml_ReaderValue( p_xml_reader );
 893         if( !psz_name || !psz_value )
 894         {
 895             msg_Err( p_demux, "invalid xml stream @ <vlc:item>" );
 896             free( psz_name );
 897             free( psz_value );
 898             return false;
 899         }
 900         /* attribute: href */
 901         if( !strcmp( psz_name, "tid" ) )
 902         {
 903             i_tid = atoi( psz_value );
 904         }
 905         /* unknown attribute */
 906         else
 907             msg_Warn( p_demux, "invalid <vlc:item> attribute:\"%s\"", psz_name);
 908
 909         free( psz_name );
 910         free( psz_value );
 911     }
 912
 913     /* attribute href is mandatory */
 914     if( i_tid < 0 )
 915     {
 916         msg_Warn( p_demux, "<vlc:item> requires \"tid\" attribute" );
 917         return false;
 918     }
 919
 920     if( i_tid >= p_demux->p_sys->i_tracklist_entries )
 921     {
 922         msg_Warn( p_demux, "invalid \"tid\" attribute" );
 923         return false;
 924     }
 925
 926     p_new_input = p_demux->p_sys->pp_tracklist[ i_tid ];
 927     if( p_new_input )
 928     {
 929         input_item_node_AppendItem( p_input_node, p_new_input );
 930         vlc_gc_decref( p_new_input );
 931         p_demux->p_sys->pp_tracklist[i_tid] = NULL;
 932     }
 933
 934     /* kludge for #1293 - XTAG sends ENDELEM for self closing tag */
 935     /* (libxml sends NONE) */
 936     xml_ReaderRead( p_xml_reader );
 937
 938     return true;
 939 }
 940
 941 /**
 942  * \brief skips complex element content that we can't manage
 943  */
 944 static bool skip_element COMPLEX_INTERFACE
 945 {
 946     VLC_UNUSED(p_demux); VLC_UNUSED(p_input_node);
 947
 948     while( xml_ReaderRead( p_xml_reader ) == 1 )
 949     {
 950         if( xml_ReaderNodeType( p_xml_reader ) == XML_READER_ENDELEM )
 951         {
 952             char *psz_endname = xml_ReaderName( p_xml_reader );
 953             if( !psz_endname )
 954                 return false;
 955             if( !strcmp( psz_element, psz_endname ) )
 956             {
 957                 free( psz_endname );
 958                 return true;
 959             }
 960             else
 961                 free( psz_endname );
 962         }
 963     }
 964     return false;
 965 }