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 #include <vlc/vlc.h>
  30 #include <vlc/input.h>
  31 #include <vlc/intf.h>
  32
  33 #include "playlist.h"
  34 #include "vlc_xml.h"
  35 #include "vlc_strings.h"
  36 #include "xspf.h"
  37
  38 struct demux_sys_t
  39 {
  40     playlist_item_t *p_item_in_category;
  41     int i_parent_id;
  42     input_item_t **pp_tracklist;
  43     int i_tracklist_entries;
  44 };
  45
  46 /**
  47  * \brief XSPF submodule initialization function
  48  */
  49 int E_(xspf_import_Activate)( vlc_object_t *p_this )
  50 {
  51     demux_t *p_demux = (demux_t *)p_this;
  52     char    *psz_ext;
  53
  54     psz_ext = strrchr( p_demux->psz_path, '.' );
  55
  56     if( ( psz_ext && !strcasecmp( psz_ext, ".xspf") ) ||
  57         ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "xspf-open") ) )
  58     {
  59         ;
  60     }
  61     else
  62     {
  63         return VLC_EGENERIC;
  64     }
  65     msg_Dbg( p_demux, "using xspf playlist import");
  66
  67     p_demux->p_sys = (demux_sys_t*)malloc(sizeof(demux_sys_t ) );
  68
  69     p_demux->pf_control = xspf_import_Control;
  70     p_demux->pf_demux = xspf_import_Demux;
  71
  72     return VLC_SUCCESS;
  73 }
  74
  75 /**
  76  * \brief demuxer function for XSPF parsing
  77  */
  78 int xspf_import_Demux( demux_t *p_demux )
  79 {
  80     int i_ret = VLC_SUCCESS;
  81     xml_t *p_xml = NULL;
  82     xml_reader_t *p_xml_reader = NULL;
  83     char *psz_name = NULL;
  84     INIT_PLAYLIST_STUFF;
  85     p_demux->p_sys->p_item_in_category = p_item_in_category;
  86     p_demux->p_sys->i_parent_id = i_parent_id;
  87     p_demux->p_sys->pp_tracklist = NULL;
  88     p_demux->p_sys->i_tracklist_entries = 0;
  89
  90     /* create new xml parser from stream */
  91     p_xml = xml_Create( p_demux );
  92     if( !p_xml )
  93         i_ret = VLC_ENOMOD;
  94     else
  95     {
  96         p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
  97         if( !p_xml_reader )
  98             i_ret = VLC_EGENERIC;
  99     }
 100
 101     /* locating the root node */
 102     if( i_ret == VLC_SUCCESS )
 103     {
 104         do
 105         {
 106             if( xml_ReaderRead( p_xml_reader ) != 1 )
 107             {
 108                 msg_Err( p_demux, "can't read xml stream" );
 109                 i_ret = VLC_EGENERIC;
 110             }
 111         } while( i_ret == VLC_SUCCESS &&
 112                  xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM );
 113     }
 114     /* checking root node name */
 115     if( i_ret == VLC_SUCCESS )
 116     {
 117         psz_name = xml_ReaderName( p_xml_reader );
 118         if( !psz_name || strcmp( psz_name, "playlist" ) )
 119         {
 120             msg_Err( p_demux, "invalid root node name: %s", psz_name );
 121             i_ret = VLC_EGENERIC;
 122         }
 123         FREE_NAME();
 124     }
 125
 126     i_ret = parse_playlist_node( p_demux, p_playlist, p_current, NULL,
 127                                  p_xml_reader, "playlist" );
 128     HANDLE_PLAY_AND_RELEASE;
 129     if( p_xml_reader )
 130         xml_ReaderDelete( p_xml, p_xml_reader );
 131     if( p_xml )
 132         xml_Delete( p_xml );
 133
 134     return i_ret;
 135     return 0;
 136 }
 137
 138 /** \brief dummy function for demux callback interface */
 139 int xspf_import_Control( demux_t *p_demux, int i_query, va_list args )
 140 {
 141     return VLC_EGENERIC;
 142 }
 143
 144 /**
 145  * \brief parse the root node of a XSPF playlist
 146  * \param p_demux demuxer instance
 147  * \param p_playlist playlist instance
 148  * \param p_item current playlist item
 149  * \param p_input current input item
 150  * \param p_xml_reader xml reader instance
 151  * \param psz_element name of element to parse
 152  */
 153 static vlc_bool_t parse_playlist_node COMPLEX_INTERFACE
 154 {
 155     char *psz_name=NULL;
 156     char *psz_value=NULL;
 157     vlc_bool_t b_version_found = VLC_FALSE;
 158     int i_node;
 159     xml_elem_hnd_t *p_handler=NULL;
 160
 161     xml_elem_hnd_t pl_elements[] =
 162         { {"title",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 163           {"creator",      SIMPLE_CONTENT,  {.smpl = set_item_info} },
 164           {"annotation",   SIMPLE_CONTENT,  {NULL} },
 165           {"info",         SIMPLE_CONTENT,  {NULL} },
 166           {"location",     SIMPLE_CONTENT,  {NULL} },
 167           {"identifier",   SIMPLE_CONTENT,  {NULL} },
 168           {"image",        SIMPLE_CONTENT,  {NULL} },
 169           {"date",         SIMPLE_CONTENT,  {NULL} },
 170           {"license",      SIMPLE_CONTENT,  {NULL} },
 171           {"attribution",  COMPLEX_CONTENT, {.cmplx = skip_element} },
 172           {"link",         SIMPLE_CONTENT,  {NULL} },
 173           {"meta",         SIMPLE_CONTENT,  {NULL} },
 174           {"extension",    COMPLEX_CONTENT, {.cmplx = parse_extension_node} },
 175           {"trackList",    COMPLEX_CONTENT, {.cmplx = parse_tracklist_node} },
 176           {NULL,           UNKNOWN_CONTENT, {NULL} }
 177         };
 178
 179     /* read all playlist attributes */
 180     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 181     {
 182         psz_name = xml_ReaderName( p_xml_reader );
 183         psz_value = xml_ReaderValue( p_xml_reader );
 184         if( !psz_name || !psz_value )
 185         {
 186             msg_Err( p_demux, "invalid xml stream @ <playlist>" );
 187             FREE_ATT();
 188             return VLC_FALSE;
 189         }
 190         /* attribute: version */
 191         if( !strcmp( psz_name, "version" ) )
 192        {
 193             b_version_found = VLC_TRUE;
 194             if( strcmp( psz_value, "0" ) && strcmp( psz_value, "1" ) )
 195                 msg_Warn( p_demux, "unsupported XSPF version" );
 196         }
 197         /* attribute: xmlns */
 198         else if( !strcmp( psz_name, "xmlns" ) )
 199             ;
 200         /* unknown attribute */
 201         else
 202             msg_Warn( p_demux, "invalid <playlist> attribute:\"%s\"", psz_name);
 203
 204         FREE_ATT();
 205     }
 206     /* attribute version is mandatory !!! */
 207     if( !b_version_found )
 208         msg_Warn( p_demux, "<playlist> requires \"version\" attribute" );
 209
 210     /* parse the child elements - we only take care of <trackList> */
 211     while( xml_ReaderRead( p_xml_reader ) == 1 )
 212     {
 213         i_node = xml_ReaderNodeType( p_xml_reader );
 214         switch( i_node )
 215         {
 216             case XML_READER_NONE:
 217                 break;
 218             case XML_READER_STARTELEM:
 219                 /*  element start tag  */
 220                 psz_name = xml_ReaderName( p_xml_reader );
 221                 if( !psz_name || !*psz_name )
 222                 {
 223                     msg_Err( p_demux, "invalid xml stream" );
 224                     FREE_ATT();
 225                     return VLC_FALSE;
 226                 }
 227                 /* choose handler */
 228                 for( p_handler = pl_elements;
 229                      p_handler->name && strcmp( psz_name, p_handler->name );
 230                      p_handler++ );
 231                 if( !p_handler->name )
 232                 {
 233                     msg_Err( p_demux, "unexpected element <%s>", psz_name );
 234                     FREE_ATT();
 235                     return VLC_FALSE;
 236                 }
 237                 FREE_NAME();
 238                 /* complex content is parsed in a separate function */
 239                 if( p_handler->type == COMPLEX_CONTENT )
 240                 {
 241                     if( p_handler->pf_handler.cmplx( p_demux,
 242                                                      p_playlist,
 243                                                      p_item,NULL,
 244                                                      p_xml_reader,
 245                                                      p_handler->name ) )
 246                     {
 247                         p_handler = NULL;
 248                         FREE_ATT();
 249                     }
 250                     else
 251                     {
 252                         FREE_ATT();
 253                         return VLC_FALSE;
 254                     }
 255                 }
 256                 break;
 257
 258             case XML_READER_TEXT:
 259                 /* simple element content */
 260                 FREE_ATT();
 261                 psz_value = xml_ReaderValue( p_xml_reader );
 262                 if( !psz_value )
 263                 {
 264                     msg_Err( p_demux, "invalid xml stream" );
 265                     FREE_ATT();
 266                     return VLC_FALSE;
 267                 }
 268                 break;
 269
 270             case XML_READER_ENDELEM:
 271                 /* element end tag */
 272                 psz_name = xml_ReaderName( p_xml_reader );
 273                 if( !psz_name )
 274                 {
 275                     msg_Err( p_demux, "invalid xml stream" );
 276                     FREE_ATT();
 277                     return VLC_FALSE;
 278                 }
 279                 /* leave if the current parent node <playlist> is terminated */
 280                 if( !strcmp( psz_name, psz_element ) )
 281                 {
 282                     FREE_ATT();
 283                     return VLC_TRUE;
 284                 }
 285                 /* there MUST have been a start tag for that element name */
 286                 if( !p_handler || !p_handler->name
 287                     || strcmp( p_handler->name, psz_name ))
 288                 {
 289                     msg_Err( p_demux, "there's no open element left for <%s>",
 290                              psz_name );
 291                     FREE_ATT();
 292                     return VLC_FALSE;
 293                 }
 294
 295                 if( p_handler->pf_handler.smpl )
 296                 {
 297                     p_handler->pf_handler.smpl( p_item, NULL, p_handler->name,
 298                                                 psz_value );
 299                 }
 300                 FREE_ATT();
 301                 p_handler = NULL;
 302                 break;
 303
 304             default:
 305                 /* unknown/unexpected xml node */
 306                 msg_Err( p_demux, "unexpected xml node %i", i_node );
 307                 FREE_ATT();
 308                 return VLC_FALSE;
 309         }
 310         FREE_NAME();
 311     }
 312     return VLC_FALSE;
 313 }
 314
 315 /**
 316  * \brief parses the tracklist node which only may contain <track>s
 317  */
 318 static vlc_bool_t parse_tracklist_node COMPLEX_INTERFACE
 319 {
 320     char *psz_name=NULL;
 321     int i_node;
 322     int i_ntracks = 0;
 323
 324     /* now parse the <track>s */
 325     while( xml_ReaderRead( p_xml_reader ) == 1 )
 326     {
 327         i_node = xml_ReaderNodeType( p_xml_reader );
 328         if( i_node == XML_READER_STARTELEM )
 329         {
 330             psz_name = xml_ReaderName( p_xml_reader );
 331             if( !psz_name )
 332             {
 333                 msg_Err( p_demux, "unexpected end of xml data" );
 334                 FREE_NAME();
 335                 return VLC_FALSE;
 336             }
 337             if( strcmp( psz_name, "track") )
 338             {
 339                 msg_Err( p_demux, "unexpected child of <trackList>: <%s>",
 340                          psz_name );
 341                 FREE_NAME();
 342                 return VLC_FALSE;
 343             }
 344             FREE_NAME();
 345
 346             /* parse the track data in a separate function */
 347             if( parse_track_node( p_demux, p_playlist, p_item, NULL,
 348                                    p_xml_reader,"track" ) == VLC_TRUE )
 349                 i_ntracks++;
 350         }
 351         else if( i_node == XML_READER_ENDELEM )
 352             break;
 353     }
 354
 355     /* the <trackList> has to be terminated */
 356     if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_ENDELEM )
 357     {
 358         msg_Err( p_demux, "there's a missing </trackList>" );
 359         FREE_NAME();
 360         return VLC_FALSE;
 361     }
 362     psz_name = xml_ReaderName( p_xml_reader );
 363     if( !psz_name || strcmp( psz_name, "trackList" ) )
 364     {
 365         msg_Err( p_demux, "expected: </trackList>, found: </%s>", psz_name );
 366         FREE_NAME();
 367         return VLC_FALSE;
 368     }
 369     FREE_NAME();
 370
 371     msg_Dbg( p_demux, "parsed %i tracks successfully", i_ntracks );
 372
 373     return VLC_TRUE;
 374 }
 375
 376 /**
 377  * \brief parse one track element
 378  * \param COMPLEX_INTERFACE
 379  */
 380 static vlc_bool_t parse_track_node COMPLEX_INTERFACE
 381 {
 382     input_item_t *p_new_input = NULL;
 383     int i_node;
 384     char *psz_name=NULL;
 385     char *psz_value=NULL;
 386     xml_elem_hnd_t *p_handler=NULL;
 387
 388     xml_elem_hnd_t track_elements[] =
 389         { {"location",     SIMPLE_CONTENT,  {NULL} },
 390           {"identifier",   SIMPLE_CONTENT,  {NULL} },
 391           {"title",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 392           {"creator",      SIMPLE_CONTENT,  {.smpl = set_item_info} },
 393           {"annotation",   SIMPLE_CONTENT,  {NULL} },
 394           {"info",         SIMPLE_CONTENT,  {NULL} },
 395           {"image",        SIMPLE_CONTENT,  {NULL} },
 396           {"album",        SIMPLE_CONTENT,  {.smpl = set_item_info} },
 397           {"trackNum",     SIMPLE_CONTENT,  {.smpl = set_item_info} },
 398           {"duration",     SIMPLE_CONTENT,  {.smpl = set_item_info} },
 399           {"link",         SIMPLE_CONTENT,  {NULL} },
 400           {"meta",         SIMPLE_CONTENT,  {NULL} },
 401           {"extension",    COMPLEX_CONTENT, {.cmplx = skip_element} },
 402           {NULL,           UNKNOWN_CONTENT, {NULL} }
 403         };
 404
 405     while( xml_ReaderRead( p_xml_reader ) == 1 )
 406     {
 407         i_node = xml_ReaderNodeType( p_xml_reader );
 408         switch( i_node )
 409         {
 410             case XML_READER_NONE:
 411                 break;
 412
 413             case XML_READER_STARTELEM:
 414                 /*  element start tag  */
 415                 psz_name = xml_ReaderName( p_xml_reader );
 416                 if( !psz_name || !*psz_name )
 417                 {
 418                     msg_Err( p_demux, "invalid xml stream" );
 419                     FREE_ATT();
 420                     return VLC_FALSE;
 421                 }
 422                 /* choose handler */
 423                 for( p_handler = track_elements;
 424                      p_handler->name && strcmp( psz_name, p_handler->name );
 425                      p_handler++ );
 426                 if( !p_handler->name )
 427                 {
 428                     msg_Err( p_demux, "unexpected element <%s>", psz_name );
 429                     FREE_ATT();
 430                     return VLC_FALSE;
 431                 }
 432                 FREE_NAME();
 433                 /* complex content is parsed in a separate function */
 434                 if( p_handler->type == COMPLEX_CONTENT )
 435                 {
 436                     if( !p_new_input )
 437                     {
 438                         msg_Err( p_demux,
 439                                  "at <%s> level no new item has been allocated",
 440                                  p_handler->name );
 441                         FREE_ATT();
 442                         return VLC_FALSE;
 443                     }
 444                     if( p_handler->pf_handler.cmplx( p_demux,
 445                                                      p_playlist,
 446                                                      NULL, p_new_input,
 447                                                      p_xml_reader,
 448                                                      p_handler->name ) )
 449                     {
 450                         p_handler = NULL;
 451                         FREE_ATT();
 452                     }
 453                     else
 454                     {
 455                         FREE_ATT();
 456                         return VLC_FALSE;
 457                     }
 458                 }
 459                 break;
 460
 461             case XML_READER_TEXT:
 462                 /* simple element content */
 463                 FREE_ATT();
 464                 psz_value = xml_ReaderValue( p_xml_reader );
 465                 if( !psz_value )
 466                 {
 467                     msg_Err( p_demux, "invalid xml stream" );
 468                     FREE_ATT();
 469                     return VLC_FALSE;
 470                 }
 471                 break;
 472
 473             case XML_READER_ENDELEM:
 474                 /* element end tag */
 475                 psz_name = xml_ReaderName( p_xml_reader );
 476                 if( !psz_name )
 477                 {
 478                     msg_Err( p_demux, "invalid xml stream" );
 479                     FREE_ATT();
 480                     return VLC_FALSE;
 481                 }
 482                 /* leave if the current parent node <track> is terminated */
 483                 if( !strcmp( psz_name, psz_element ) )
 484                 {
 485                     FREE_ATT();
 486                     /* Add it */
 487                     /*playlist_AddWhereverNeeded( p_playlist, p_new_input,
 488                               p_item, p_demux->p_sys->p_item_in_category,
 489                               (p_demux->p_sys->i_parent_id >0 ) ? VLC_TRUE:
 490                               VLC_FALSE, PLAYLIST_APPEND );*/
 491                     INSERT_ELEM( p_demux->p_sys->pp_tracklist,
 492                                  p_demux->p_sys->i_tracklist_entries,
 493                                  p_demux->p_sys->i_tracklist_entries,
 494                                  p_new_input );
 495                     return VLC_TRUE;
 496                 }
 497                 /* there MUST have been a start tag for that element name */
 498                 if( !p_handler || !p_handler->name
 499                     || strcmp( p_handler->name, psz_name ))
 500                 {
 501                     msg_Err( p_demux, "there's no open element left for <%s>",
 502                              psz_name );
 503                     FREE_ATT();
 504                     return VLC_FALSE;
 505                 }
 506
 507                 /* special case: location */
 508                 if( !strcmp( p_handler->name, "location" ) )
 509                 {
 510                     char *psz_uri=NULL;
 511                     /* there MUST NOT be an item */
 512                     if( p_new_input )
 513                     {
 514                         msg_Err( p_demux, "item <%s> already created",
 515                                  psz_name );
 516                         FREE_ATT();
 517                         return VLC_FALSE;
 518                     }
 519                     psz_uri = unescape_URI_duplicate( psz_value );
 520
 521                     if( psz_uri )
 522                     {
 523                         p_new_input = input_ItemNewExt( p_playlist, psz_uri,
 524                                                         NULL, 0, NULL, -1 );
 525                         p_new_input->p_meta = vlc_meta_New();
 526                         free( psz_uri );
 527                         vlc_input_item_CopyOptions( p_item->p_input, p_new_input );
 528                         psz_uri = NULL;
 529                         FREE_ATT();
 530                         p_handler = NULL;
 531                     }
 532                     else
 533                     {
 534                         FREE_ATT();
 535                         return VLC_FALSE;
 536                     }
 537                 }
 538                 else if( !strcmp( p_handler->name, "identifier" ) )
 539                 {
 540                 }
 541                 else
 542                 {
 543                     /* there MUST be an item */
 544                     if( !p_new_input )
 545                     {
 546                         msg_Err( p_demux, "item not yet created at <%s>",
 547                                  psz_name );
 548                         FREE_ATT();
 549                         return VLC_FALSE;
 550                     }
 551                     if( p_handler->pf_handler.smpl )
 552                     {
 553                         p_handler->pf_handler.smpl( NULL, p_input,
 554                                                     p_handler->name,
 555                                                     psz_value );
 556                         FREE_ATT();
 557                     }
 558                 }
 559                 FREE_ATT();
 560                 p_handler = NULL;
 561                 break;
 562
 563             default:
 564                 /* unknown/unexpected xml node */
 565                 msg_Err( p_demux, "unexpected xml node %i", i_node );
 566                 FREE_ATT();
 567                 return VLC_FALSE;
 568         }
 569         FREE_NAME();
 570     }
 571     msg_Err( p_demux, "unexpected end of xml data" );
 572     FREE_ATT();
 573     return VLC_FALSE;
 574 }
 575
 576 /**
 577  * \brief handles the supported <track> sub-elements
 578  */
 579 static vlc_bool_t set_item_info SIMPLE_INTERFACE
 580 {
 581     /* exit if setting is impossible */
 582     if( !psz_name || !psz_value || !p_input )
 583         return VLC_FALSE;
 584
 585     /* re-convert xml special characters inside psz_value */
 586     resolve_xml_special_chars( psz_value );
 587
 588     /* handle each info element in a separate "if" clause */
 589     if( !strcmp( psz_name, "title" ) )
 590     {
 591         p_input->psz_name = strdup( (char*)psz_value );
 592     }
 593     else if( !strcmp( psz_name, "creator" ) )
 594     {
 595         vlc_meta_SetArtist( p_input->p_meta, psz_value );
 596     }
 597     else if( !strcmp( psz_name, "album" ) )
 598     {
 599         vlc_meta_SetAlbum( p_input->p_meta, psz_value );
 600
 601     }
 602     else if( !strcmp( psz_name, "trackNum" ) )
 603     {
 604         vlc_meta_SetTracknum( p_input->p_meta, psz_value );
 605     }
 606     else if( !strcmp( psz_name, "duration" ) )
 607     {
 608         long i_num = atol( psz_value );
 609         p_input->i_duration = i_num*1000;
 610     }
 611     return VLC_TRUE;
 612 }
 613
 614
 615 /**
 616  * \brief parse the extension node of a XSPF playlist
 617  */
 618 static vlc_bool_t parse_extension_node COMPLEX_INTERFACE
 619 {
 620     char *psz_name = NULL;
 621     char *psz_value = NULL;
 622     int i_node;
 623     xml_elem_hnd_t *p_handler = NULL;
 624
 625     xml_elem_hnd_t pl_elements[] =
 626         { {"title", SIMPLE_CONTENT,  {.cmplx = skip_element} },
 627           {"node",  COMPLEX_CONTENT, {.cmplx = parse_extension_node} },
 628           {"item",  COMPLEX_CONTENT, {.cmplx = parse_extitem_node} },
 629           {NULL,    UNKNOWN_CONTENT, {NULL} }
 630         };
 631
 632     fprintf( stderr, "  <node>\n" );
 633
 634     /* parse the child elements */
 635     while( xml_ReaderRead( p_xml_reader ) == 1 )
 636     {
 637         i_node = xml_ReaderNodeType( p_xml_reader );
 638         switch( i_node )
 639         {
 640             case XML_READER_NONE:
 641                 break;
 642             case XML_READER_STARTELEM:
 643                 /*  element start tag  */
 644                 psz_name = xml_ReaderName( p_xml_reader );
 645                 if( !psz_name || !*psz_name )
 646                 {
 647                     msg_Err( p_demux, "invalid xml stream" );
 648                     FREE_ATT();
 649                     return VLC_FALSE;
 650                 }
 651                 /* choose handler */
 652                 for( p_handler = pl_elements;
 653                      p_handler->name && strcmp( psz_name, p_handler->name );
 654                      p_handler++ );
 655                 if( !p_handler->name )
 656                 {
 657                     msg_Err( p_demux, "unexpected element <%s>", psz_name );
 658                     FREE_ATT();
 659                     return VLC_FALSE;
 660                 }
 661                 FREE_NAME();
 662                 /* complex content is parsed in a separate function */
 663                 if( p_handler->type == COMPLEX_CONTENT )
 664                 {
 665                     if( p_handler->pf_handler.cmplx( p_demux,
 666                                                      p_playlist,
 667                                                      p_item, NULL,
 668                                                      p_xml_reader,
 669                                                      p_handler->name ) )
 670                     {
 671                         p_handler = NULL;
 672                         FREE_ATT();
 673                     }
 674                     else
 675                     {
 676                         FREE_ATT();
 677                         return VLC_FALSE;
 678                     }
 679                 }
 680                 break;
 681
 682             case XML_READER_TEXT:
 683                 /* simple element content */
 684                 FREE_ATT();
 685                 psz_value = xml_ReaderValue( p_xml_reader );
 686                 if( !psz_value )
 687                 {
 688                     msg_Err( p_demux, "invalid xml stream" );
 689                     FREE_ATT();
 690                     return VLC_FALSE;
 691                 }
 692                 break;
 693
 694             case XML_READER_ENDELEM:
 695                 /* element end tag */
 696                 psz_name = xml_ReaderName( p_xml_reader );
 697                 if( !psz_name )
 698                 {
 699                     msg_Err( p_demux, "invalid xml stream" );
 700                     FREE_ATT();
 701                     return VLC_FALSE;
 702                 }
 703                 /* leave if the current parent node is terminated */
 704                 if( !strcmp( psz_name, psz_element ) )
 705                 {
 706                     fprintf( stderr, "  </node>\n" );
 707                     FREE_ATT();
 708                     return VLC_TRUE;
 709                 }
 710                 /* there MUST have been a start tag for that element name */
 711                 if( !p_handler || !p_handler->name
 712                     || strcmp( p_handler->name, psz_name ))
 713                 {
 714                     msg_Err( p_demux, "there's no open element left for <%s>",
 715                              psz_name );
 716                     FREE_ATT();
 717                     return VLC_FALSE;
 718                 }
 719
 720                 if( p_handler->pf_handler.smpl )
 721                 {
 722                     p_handler->pf_handler.smpl( p_item, NULL, p_handler->name,
 723                                                 psz_value );
 724                 }
 725                 FREE_ATT();
 726                 p_handler = NULL;
 727                 break;
 728
 729             default:
 730                 /* unknown/unexpected xml node */
 731                 msg_Err( p_demux, "unexpected xml node %i", i_node );
 732                 FREE_ATT();
 733                 return VLC_FALSE;
 734         }
 735         FREE_NAME();
 736     }
 737     return VLC_FALSE;
 738 }
 739
 740 /**
 741  * \brief parse the extension item node of a XSPF playlist
 742  */
 743 static vlc_bool_t parse_extitem_node COMPLEX_INTERFACE
 744 {
 745     char *psz_name = NULL;
 746     char *psz_value = NULL;
 747     int i_node;
 748     int i_href = -1;
 749
 750     /* read all playlist attributes */
 751     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 752     {
 753         psz_name = xml_ReaderName( p_xml_reader );
 754         psz_value = xml_ReaderValue( p_xml_reader );
 755         if( !psz_name || !psz_value )
 756         {
 757             msg_Err( p_demux, "invalid xml stream @ <item>" );
 758             FREE_ATT();
 759             return VLC_FALSE;
 760         }
 761         /* attribute: href */
 762         if( !strcmp( psz_name, "href" ) )
 763         {
 764             i_href = atoi( psz_value );
 765         }
 766         /* unknown attribute */
 767         else
 768             msg_Warn( p_demux, "invalid <item> attribute:\"%s\"", psz_name);
 769
 770         FREE_ATT();
 771     }
 772
 773     /* attribute href is mandatory */
 774     if( i_href < 0 )
 775     {
 776         msg_Warn( p_demux, "<item> requires \"href\" attribute" );
 777         return VLC_FALSE;
 778     }
 779
 780     if( i_href > p_demux->p_sys->i_tracklist_entries )
 781     {
 782         msg_Warn( p_demux, "invalid \"href\" attribute" );
 783         return VLC_FALSE;
 784     }
 785
 786     fprintf( stderr, "    %s\n", p_demux->p_sys->pp_tracklist[i_href]->psz_name );
 787
 788     /* parse the child elements */
 789     while( xml_ReaderRead( p_xml_reader ) == 1 )
 790     {
 791         i_node = xml_ReaderNodeType( p_xml_reader );
 792         switch( i_node )
 793         {
 794             case XML_READER_NONE:
 795                 break;
 796             case XML_READER_STARTELEM:
 797                 /*  element start tag  */
 798             case XML_READER_TEXT:
 799                 /* simple element content */
 800                 msg_Err( p_demux, "invalid xml stream" );
 801                 return VLC_FALSE;
 802
 803             case XML_READER_ENDELEM:
 804                 /* element end tag */
 805                 psz_name = xml_ReaderName( p_xml_reader );
 806                 if( !psz_name )
 807                 {
 808                     msg_Err( p_demux, "invalid xml stream" );
 809                     FREE_ATT();
 810                     return VLC_FALSE;
 811                 }
 812                 /* leave if the current parent node is terminated */
 813                 if( !strcmp( psz_name, psz_element ) )
 814                 {
 815                     FREE_ATT();
 816                     return VLC_TRUE;
 817                 }
 818                 FREE_ATT();
 819                 break;
 820
 821             default:
 822                 /* unknown/unexpected xml node */
 823                 msg_Err( p_demux, "unexpected xml node %i", i_node );
 824                 FREE_ATT();
 825                 return VLC_FALSE;
 826         }
 827         FREE_NAME();
 828     }
 829     return VLC_FALSE;
 830 }
 831
 832 /**
 833  * \brief skips complex element content that we can't manage
 834  */
 835 static vlc_bool_t skip_element COMPLEX_INTERFACE
 836 {
 837     char *psz_endname;
 838
 839     while( xml_ReaderRead( p_xml_reader ) == 1 )
 840     {
 841         if( xml_ReaderNodeType( p_xml_reader ) == XML_READER_ENDELEM )
 842         {
 843             psz_endname = xml_ReaderName( p_xml_reader );
 844             if( !psz_endname )
 845                 return VLC_FALSE;
 846             if( !strcmp( psz_element, psz_endname ) )
 847             {
 848                 free( psz_endname );
 849                 return VLC_TRUE;
 850             }
 851             else
 852                 free( psz_endname );
 853         }
 854     }
 855     return VLC_FALSE;
 856 }