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

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