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

   1 /*****************************************************************************
   2  * podcast.c : podcast playlist imports
   3  *****************************************************************************
   4  * Copyright (C) 2005 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 #include <vlc/vlc.h>
  28 #include <vlc_demux.h>
  29
  30 #include "playlist.h"
  31 #include "vlc_xml.h"
  32
  33 struct demux_sys_t
  34 {
  35     char *psz_prefix;
  36     playlist_t *p_playlist;
  37     xml_t *p_xml;
  38     xml_reader_t *p_xml_reader;
  39 };
  40
  41 /*****************************************************************************
  42  * Local prototypes
  43  *****************************************************************************/
  44 static int Demux( demux_t *p_demux);
  45 static int Control( demux_t *p_demux, int i_query, va_list args );
  46
  47 /*****************************************************************************
  48  * Import_podcast: main import function
  49  *****************************************************************************/
  50 int E_(Import_podcast)( vlc_object_t *p_this )
  51 {
  52     demux_t *p_demux = (demux_t *)p_this;
  53
  54     if( !demux2_IsForced( p_demux, "podcast" ) )
  55         return VLC_EGENERIC;
  56
  57     STANDARD_DEMUX_INIT_MSG( "using podcast reader" );
  58     p_demux->p_sys->psz_prefix = E_(FindPrefix)( p_demux );
  59     p_demux->p_sys->p_playlist = NULL;
  60     p_demux->p_sys->p_xml = NULL;
  61     p_demux->p_sys->p_xml_reader = NULL;
  62
  63     return VLC_SUCCESS;
  64 }
  65
  66 /*****************************************************************************
  67  * Deactivate: frees unused data
  68  *****************************************************************************/
  69 void E_(Close_podcast)( vlc_object_t *p_this )
  70 {
  71     demux_t *p_demux = (demux_t *)p_this;
  72     demux_sys_t *p_sys = p_demux->p_sys;
  73
  74     if( p_sys->psz_prefix ) free( p_sys->psz_prefix );
  75     if( p_sys->p_playlist ) vlc_object_release( p_sys->p_playlist );
  76     if( p_sys->p_xml_reader ) xml_ReaderDelete( p_sys->p_xml, p_sys->p_xml_reader );
  77     if( p_sys->p_xml ) xml_Delete( p_sys->p_xml );
  78     free( p_sys );
  79 }
  80
  81 /* "specs" : http://phobos.apple.com/static/iTunesRSS.html */
  82 static int Demux( demux_t *p_demux )
  83 {
  84     demux_sys_t *p_sys = p_demux->p_sys;
  85
  86     vlc_bool_t b_item = VLC_FALSE;
  87     vlc_bool_t b_image = VLC_FALSE;
  88     int i_ret;
  89
  90     xml_t *p_xml;
  91     xml_reader_t *p_xml_reader;
  92     char *psz_elname = NULL;
  93     char *psz_item_mrl = NULL;
  94     char *psz_item_size = NULL;
  95     char *psz_item_type = NULL;
  96     char *psz_item_name = NULL;
  97     char *psz_item_date = NULL;
  98     char *psz_item_author = NULL;
  99     char *psz_item_category = NULL;
 100     char *psz_item_duration = NULL;
 101     char *psz_item_keywords = NULL;
 102     char *psz_item_subtitle = NULL;
 103     char *psz_item_summary = NULL;
 104     int i_type;
 105     input_item_t *p_input;
 106
 107     INIT_PLAYLIST_STUFF;
 108
 109     p_xml = p_sys->p_xml = xml_Create( p_demux );
 110     if( !p_xml ) return -1;
 111
 112 /*    psz_elname = stream_ReadLine( p_demux->s );
 113     if( psz_elname ) free( psz_elname );
 114     psz_elname = 0;*/
 115
 116     p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
 117     if( !p_xml_reader ) return -1;
 118     p_sys->p_xml_reader = p_xml_reader;
 119
 120     /* xml */
 121     /* check root node */
 122     if( xml_ReaderRead( p_xml_reader ) != 1 )
 123     {
 124         msg_Err( p_demux, "invalid file (no root node)" );
 125         return -1;
 126     }
 127     if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
 128         ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
 129         strcmp( psz_elname, "rss" ) )
 130     {
 131         msg_Err( p_demux, "invalid root node %i, %s",
 132                  xml_ReaderNodeType( p_xml_reader ), psz_elname );
 133         if( psz_elname ) free( psz_elname );
 134         return -1;
 135     }
 136     free( psz_elname ); psz_elname = NULL;
 137
 138     while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 )
 139     {
 140         // Get the node type
 141         i_type = xml_ReaderNodeType( p_xml_reader );
 142         switch( i_type )
 143         {
 144             // Error
 145             case -1:
 146                 return -1;
 147                 break;
 148
 149             case XML_READER_STARTELEM:
 150             {
 151                 // Read the element name
 152                 if( psz_elname ) free( psz_elname );
 153                 psz_elname = xml_ReaderName( p_xml_reader );
 154                 if( !psz_elname ) return -1;
 155
 156                 if( !strcmp( psz_elname, "item" ) )
 157                 {
 158                     b_item = VLC_TRUE;
 159                 }
 160                 else if( !strcmp( psz_elname, "image" ) )
 161                 {
 162                     b_item = VLC_TRUE;
 163                 }
 164
 165                 // Read the attributes
 166                 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 167                 {
 168                     char *psz_name = xml_ReaderName( p_xml_reader );
 169                     char *psz_value = xml_ReaderValue( p_xml_reader );
 170                     if( !psz_name || !psz_value ) return -1;
 171                     if( !strcmp( psz_elname, "enclosure" ) &&
 172                         !strcmp( psz_name, "url" ) )
 173                     {
 174                         psz_item_mrl = strdup( psz_value );
 175                     }
 176                     else if( !strcmp( psz_elname, "enclosure" ) &&
 177                         !strcmp( psz_name, "length" ) )
 178                     {
 179                         psz_item_size = strdup( psz_value );
 180                     }
 181                     else if( !strcmp( psz_elname, "enclosure" ) &&
 182                         !strcmp( psz_name, "type" ) )
 183                     {
 184                         psz_item_type = strdup( psz_value );
 185                     }
 186                     else
 187                     {
 188                         msg_Dbg( p_demux,"unhandled attribure %s in element %s",
 189                                   psz_name, psz_elname );
 190                     }
 191                     free( psz_name );
 192                     free( psz_value );
 193                 }
 194                 break;
 195             }
 196             case XML_READER_TEXT:
 197             {
 198 #define SET_DATA( field, name ) else if( b_item == VLC_TRUE \
 199                 && !strcmp( psz_elname, name ) ) \
 200                 { \
 201                     field = strdup( psz_text ); \
 202                 }
 203                 char *psz_text = xml_ReaderValue( p_xml_reader );
 204                 /* item specific meta data */
 205                 if( b_item == VLC_TRUE && !strcmp( psz_elname, "title" ) )
 206                 {
 207                     psz_item_name = strdup( psz_text );
 208                 }
 209                 else if( b_item == VLC_TRUE
 210                          && ( !strcmp( psz_elname, "itunes:author" )
 211                             ||!strcmp( psz_elname, "author" ) ) )
 212                 { /* <author> isn't standard iTunes podcast stuff */
 213                     psz_item_author = strdup( psz_text );
 214                 }
 215                 else if( b_item == VLC_TRUE
 216                          && ( !strcmp( psz_elname, "itunes:summary" )
 217                             ||!strcmp( psz_elname, "description" ) ) )
 218                 { /* <description> isn't standard iTunes podcast stuff */
 219                     psz_item_summary = strdup( psz_text );
 220                 }
 221                 SET_DATA( psz_item_date, "pubDate" )
 222                 SET_DATA( psz_item_category, "itunes:category" )
 223                 SET_DATA( psz_item_duration, "itunes:duration" )
 224                 SET_DATA( psz_item_keywords, "itunes:keywords" )
 225                 SET_DATA( psz_item_subtitle, "itunes:subtitle" )
 226                 /* toplevel meta data */
 227                 else if( b_item == VLC_FALSE && b_image == VLC_FALSE
 228                          && !strcmp( psz_elname, "title" ) )
 229                 {
 230                     input_item_SetName( p_current_input, psz_text );
 231                 }
 232 #define ADD_GINFO( info, name ) \
 233     else if( !b_item && !b_image && !strcmp( psz_elname, name ) ) \
 234     { \
 235         input_ItemAddInfo( p_current_input, _("Podcast Info"), \
 236                                 _( info ), "%s", psz_text ); \
 237     }
 238                 ADD_GINFO( "Podcast Link", "link" )
 239                 ADD_GINFO( "Podcast Copyright", "copyright" )
 240                 ADD_GINFO( "Podcast Category", "itunes:category" )
 241                 ADD_GINFO( "Podcast Keywords", "itunes:keywords" )
 242                 ADD_GINFO( "Podcast Subtitle", "itunes:subtitle" )
 243 #undef ADD_GINFO
 244                 else if( b_item == VLC_FALSE && b_image == VLC_FALSE
 245                          && ( !strcmp( psz_elname, "itunes:summary" )
 246                             ||!strcmp( psz_elname, "description" ) ) )
 247                 { /* <description> isn't standard iTunes podcast stuff */
 248                     input_ItemAddInfo( p_current_input,
 249                              _( "Podcast Info" ), _( "Podcast Summary" ),
 250                              "%s", psz_text );
 251                 }
 252                 else
 253                 {
 254                     msg_Dbg( p_demux, "unhandled text in element '%s'",
 255                               psz_elname );
 256                 }
 257                 free( psz_text );
 258                 break;
 259             }
 260             // End element
 261             case XML_READER_ENDELEM:
 262             {
 263                 // Read the element name
 264                 free( psz_elname );
 265                 psz_elname = xml_ReaderName( p_xml_reader );
 266                 if( !psz_elname ) return -1;
 267                 if( !strcmp( psz_elname, "item" ) )
 268                 {
 269                     p_input = input_ItemNewExt( p_playlist, psz_item_mrl,
 270                                                 psz_item_name, 0, NULL, -1 );
 271                     if( p_input == NULL ) break;
 272 #define ADD_INFO( info, field ) \
 273     if( field ) { input_ItemAddInfo( p_input, \
 274                             _( "Podcast Info" ),  _( info ), "%s", field ); }
 275                     ADD_INFO( "Podcast Publication Date", psz_item_date  );
 276                     ADD_INFO( "Podcast Author", psz_item_author );
 277                     ADD_INFO( "Podcast Subcategory", psz_item_category );
 278                     ADD_INFO( "Podcast Duration", psz_item_duration );
 279                     ADD_INFO( "Podcast Keywords", psz_item_keywords );
 280                     ADD_INFO( "Podcast Subtitle", psz_item_subtitle );
 281                     ADD_INFO( "Podcast Summary", psz_item_summary );
 282                     ADD_INFO( "Podcast Type", psz_item_type );
 283                     if( psz_item_size )
 284                     {
 285                         input_ItemAddInfo( p_input,
 286                                                 _( "Podcast Info" ),
 287                                                 _( "Podcast Size" ),
 288                                                 "%s bytes",
 289                                                 psz_item_size );
 290                     }
 291                     input_ItemAddSubItem( p_current_input, p_input );
 292                     FREENULL( psz_item_name );
 293                     FREENULL( psz_item_mrl );
 294                     FREENULL( psz_item_size );
 295                     FREENULL( psz_item_type );
 296                     FREENULL( psz_item_date );
 297                     FREENULL( psz_item_author );
 298                     FREENULL( psz_item_category );
 299                     FREENULL( psz_item_duration );
 300                     FREENULL( psz_item_keywords );
 301                     FREENULL( psz_item_subtitle );
 302                     FREENULL( psz_item_summary );
 303                     b_item = VLC_FALSE;
 304                 }
 305                 else if( !strcmp( psz_elname, "image" ) )
 306                 {
 307                     b_image = VLC_FALSE;
 308                 }
 309                 free( psz_elname );
 310                 psz_elname = strdup("");
 311
 312                 break;
 313             }
 314         }
 315     }
 316
 317     if( i_ret != 0 )
 318     {
 319         msg_Warn( p_demux, "error while parsing data" );
 320     }
 321
 322     HANDLE_PLAY_AND_RELEASE;
 323     return -1; /* Needed for correct operation of go back */
 324 }
 325
 326 static int Control( demux_t *p_demux, int i_query, va_list args )
 327 {
 328     return VLC_EGENERIC;
 329 }