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

   1 /*****************************************************************************
   2  * podcast.c : podcast playlist imports
   3  *****************************************************************************
   4  * Copyright (C) 2005-2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_demux.h>
  33
  34 #include "playlist.h"
  35 #include <vlc_xml.h>
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static int Demux( demux_t *p_demux);
  41 static mtime_t strTimeToMTime( const char *psz );
  42
  43 /*****************************************************************************
  44  * Import_podcast: main import function
  45  *****************************************************************************/
  46 int Import_podcast( vlc_object_t *p_this )
  47 {
  48     demux_t *p_demux = (demux_t *)p_this;
  49
  50     if( !demux_IsForced( p_demux, "podcast" ) )
  51         return VLC_EGENERIC;
  52
  53     p_demux->pf_demux = Demux;
  54     p_demux->pf_control = Control;
  55     msg_Dbg( p_demux, "using podcast reader" );
  56
  57     return VLC_SUCCESS;
  58 }
  59
  60 /* "specs" : http://phobos.apple.com/static/iTunesRSS.html */
  61 static int Demux( demux_t *p_demux )
  62 {
  63     bool b_item = false;
  64     bool b_image = false;
  65
  66     xml_reader_t *p_xml_reader;
  67     char *psz_elname = NULL;
  68     char *psz_item_mrl = NULL;
  69     char *psz_item_size = NULL;
  70     char *psz_item_type = NULL;
  71     char *psz_item_name = NULL;
  72     char *psz_item_date = NULL;
  73     char *psz_item_author = NULL;
  74     char *psz_item_category = NULL;
  75     char *psz_item_duration = NULL;
  76     char *psz_item_keywords = NULL;
  77     char *psz_item_subtitle = NULL;
  78     char *psz_item_summary = NULL;
  79     char *psz_art_url = NULL;
  80     const char *node;
  81     int i_type;
  82     input_item_t *p_input;
  83     input_item_node_t *p_subitems = NULL;
  84
  85     input_item_t *p_current_input = GetCurrentItem(p_demux);
  86
  87     p_xml_reader = xml_ReaderCreate( p_demux, p_demux->s );
  88     if( !p_xml_reader )
  89         goto error;
  90
  91     /* xml */
  92     /* check root node */
  93     if( xml_ReaderNextNode( p_xml_reader, &node ) != XML_READER_STARTELEM )
  94     {
  95         msg_Err( p_demux, "invalid file (no root node)" );
  96         goto error;
  97     }
  98
  99     if( strcmp( node, "rss" ) )
 100     {
 101         msg_Err( p_demux, "invalid root node <%s>", node );
 102         goto error;
 103     }
 104
 105     p_subitems = input_item_node_Create( p_current_input );
 106
 107     while( (i_type = xml_ReaderNextNode( p_xml_reader, &node )) > 0 )
 108     {
 109         switch( i_type )
 110         {
 111             case XML_READER_STARTELEM:
 112             {
 113                 free( psz_elname );
 114                 psz_elname = strdup( node );
 115                 if( unlikely(!node) )
 116                     goto error;
 117
 118                 if( !strcmp( node, "item" ) )
 119                     b_item = true;
 120                 else if( !strcmp( node, "image" ) )
 121                     b_image = true;
 122
 123                 // Read the attributes
 124                 const char *attr, *value;
 125                 while( (attr = xml_ReaderNextAttr( p_xml_reader, &value )) )
 126                 {
 127                     if( !strcmp( node, "enclosure" ) )
 128                     {
 129                         char **p = NULL;
 130                         if( !strcmp( attr, "url" ) )
 131                             p = &psz_item_mrl;
 132                         else if( !strcmp( attr, "length" ) )
 133                             p = &psz_item_size;
 134                         else if( !strcmp( attr, "type" ) )
 135                             p = &psz_item_type;
 136                         if( p != NULL )
 137                         {
 138                             free( *p );
 139                             *p = strdup( value );
 140                         }
 141                         else
 142                             msg_Dbg( p_demux,"unhandled attribute %s in <%s>",
 143                                      attr, node );
 144                     }
 145                     else
 146                         msg_Dbg( p_demux,"unhandled attribute %s in <%s>",
 147                                  attr, node );
 148                 }
 149                 break;
 150             }
 151
 152             case XML_READER_TEXT:
 153             {
 154                 if(!psz_elname) break;
 155
 156                 /* item specific meta data */
 157                 if( b_item )
 158                 {
 159                     char **p;
 160
 161                     if( !strcmp( psz_elname, "title" ) )
 162                         p = &psz_item_name;
 163                     else if( !strcmp( psz_elname, "itunes:author" ) ||
 164                              !strcmp( psz_elname, "author" ) )
 165                         /* <author> isn't standard iTunes podcast stuff */
 166                         p = &psz_item_author;
 167                     else if( !strcmp( psz_elname, "itunes:summary" ) ||
 168                              !strcmp( psz_elname, "description" ) )
 169                         /* <description> isn't standard iTunes podcast stuff */
 170                         p = &psz_item_summary;
 171                     else if( !strcmp( psz_elname, "pubDate" ) )
 172                         p = &psz_item_date;
 173                     else if( !strcmp( psz_elname, "itunes:category" ) )
 174                         p = &psz_item_category;
 175                     else if( !strcmp( psz_elname, "itunes:duration" ) )
 176                         p = &psz_item_duration;
 177                     else if( !strcmp( psz_elname, "itunes:keywords" ) )
 178                         p = &psz_item_keywords;
 179                     else if( !strcmp( psz_elname, "itunes:subtitle" ) )
 180                         p = &psz_item_subtitle;
 181                     else
 182                         break;
 183
 184                     free( *p );
 185                     *p = strdup( node );
 186                 }
 187                 /* toplevel meta data */
 188                 else if( !b_image )
 189                 {
 190                     if( !strcmp( psz_elname, "title" ) )
 191                         input_item_SetName( p_current_input, node );
 192 #define ADD_GINFO( info, name ) \
 193     else if( !strcmp( psz_elname, name ) ) \
 194         input_item_AddInfo( p_current_input, _("Podcast Info"), \
 195                             info, "%s", node );
 196                     ADD_GINFO( _("Podcast Link"), "link" )
 197                     ADD_GINFO( _("Podcast Copyright"), "copyright" )
 198                     ADD_GINFO( _("Podcast Category"), "itunes:category" )
 199                     ADD_GINFO( _("Podcast Keywords"), "itunes:keywords" )
 200                     ADD_GINFO( _("Podcast Subtitle"), "itunes:subtitle" )
 201 #undef ADD_GINFO
 202                     else if( !strcmp( psz_elname, "itunes:summary" ) ||
 203                              !strcmp( psz_elname, "description" ) )
 204                     { /* <description> isn't standard iTunes podcast stuff */
 205                         input_item_AddInfo( p_current_input,
 206                             _( "Podcast Info" ), _( "Podcast Summary" ),
 207                             "%s", node );
 208                     }
 209                 }
 210                 else
 211                 {
 212                     if( !strcmp( psz_elname, "url" ) )
 213                     {
 214                         free( psz_art_url );
 215                         psz_art_url = strdup( node );
 216                     }
 217                     else
 218                         msg_Dbg( p_demux, "unhandled text in element <%s>",
 219                                  psz_elname );
 220                 }
 221                 break;
 222             }
 223
 224             // End element
 225             case XML_READER_ENDELEM:
 226             {
 227                 FREENULL( psz_elname );
 228
 229                 if( !strcmp( node, "item" ) )
 230                 {
 231                     if( psz_item_mrl == NULL )
 232                     {
 233                         if (psz_item_name)
 234                             msg_Warn( p_demux, "invalid XML item, skipping %s",
 235                                       psz_item_name );
 236                         else
 237                             msg_Warn( p_demux, "invalid XML item, skipped" );
 238                         FREENULL( psz_item_name );
 239                         FREENULL( psz_item_size );
 240                         FREENULL( psz_item_type );
 241                         FREENULL( psz_item_date );
 242                         FREENULL( psz_item_author );
 243                         FREENULL( psz_item_category );
 244                         FREENULL( psz_item_duration );
 245                         FREENULL( psz_item_keywords );
 246                         FREENULL( psz_item_subtitle );
 247                         FREENULL( psz_item_summary );
 248                         FREENULL( psz_art_url );
 249                         FREENULL( psz_elname );
 250                         continue;
 251                     }
 252
 253                     p_input = input_item_New( psz_item_mrl, psz_item_name );
 254                     FREENULL( psz_item_mrl );
 255                     FREENULL( psz_item_name );
 256
 257                     if( p_input == NULL )
 258                         break; /* FIXME: meta data memory leaks? */
 259
 260                     /* Set the duration if available */
 261                     if( psz_item_duration )
 262                         input_item_SetDuration( p_input, strTimeToMTime( psz_item_duration ) );
 263
 264 #define ADD_INFO( info, field ) \
 265     if( field ) { \
 266         input_item_AddInfo( p_input, _( "Podcast Info" ), (info), "%s", \
 267                             (field) ); \
 268         FREENULL( field ); }
 269                     ADD_INFO( _("Podcast Publication Date"), psz_item_date  );
 270                     ADD_INFO( _("Podcast Author"), psz_item_author );
 271                     ADD_INFO( _("Podcast Subcategory"), psz_item_category );
 272                     ADD_INFO( _("Podcast Duration"), psz_item_duration );
 273                     ADD_INFO( _("Podcast Keywords"), psz_item_keywords );
 274                     ADD_INFO( _("Podcast Subtitle"), psz_item_subtitle );
 275                     ADD_INFO( _("Podcast Summary"), psz_item_summary );
 276                     ADD_INFO( _("Podcast Type"), psz_item_type );
 277 #undef ADD_INFO
 278
 279                     /* Add the global art url to this item, if any */
 280                     if( psz_art_url )
 281                         input_item_SetArtURL( p_input, psz_art_url );
 282
 283                     if( psz_item_size )
 284                     {
 285                         input_item_AddInfo( p_input,
 286                                                 _( "Podcast Info" ),
 287                                                 _( "Podcast Size" ),
 288                                                 _("%s bytes"),
 289                                                 psz_item_size );
 290                         FREENULL( psz_item_size );
 291                     }
 292                     input_item_node_AppendItem( p_subitems, p_input );
 293                     vlc_gc_decref( p_input );
 294                     b_item = false;
 295                 }
 296                 else if( !strcmp( node, "image" ) )
 297                 {
 298                     b_image = false;
 299                 }
 300                 break;
 301             }
 302         }
 303     }
 304
 305     if( i_type < 0 )
 306     {
 307         msg_Warn( p_demux, "error while parsing data" );
 308     }
 309
 310     free( psz_art_url );
 311     free( psz_elname );
 312     xml_ReaderDelete( p_xml_reader );
 313
 314     input_item_node_PostAndDelete( p_subitems );
 315     vlc_gc_decref(p_current_input);
 316     return 0; /* Needed for correct operation of go back */
 317
 318 error:
 319     free( psz_item_name );
 320     free( psz_item_mrl );
 321     free( psz_item_size );
 322     free( psz_item_type );
 323     free( psz_item_date );
 324     free( psz_item_author );
 325     free( psz_item_category );
 326     free( psz_item_duration );
 327     free( psz_item_keywords );
 328     free( psz_item_subtitle );
 329     free( psz_item_summary );
 330     free( psz_art_url );
 331     free( psz_elname );
 332
 333     if( p_xml_reader )
 334         xml_ReaderDelete( p_xml_reader );
 335     if( p_subitems )
 336         input_item_node_Delete( p_subitems );
 337
 338     vlc_gc_decref(p_current_input);
 339     return -1;
 340 }
 341
 342 static mtime_t strTimeToMTime( const char *psz )
 343 {
 344     int h, m, s;
 345     switch( sscanf( psz, "%u:%u:%u", &h, &m, &s ) )
 346     {
 347     case 3:
 348         return (mtime_t)( ( h*60 + m )*60 + s ) * 1000000;
 349     case 2:
 350         return (mtime_t)( h*60 + m ) * 1000000;
 351         break;
 352     default:
 353         return -1;
 354     }
 355 }