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 struct demux_sys_t
  38 {
  39     xml_t *p_xml;
  40     xml_reader_t *p_xml_reader;
  41 };
  42
  43 /*****************************************************************************
  44  * Local prototypes
  45  *****************************************************************************/
  46 static int Demux( demux_t *p_demux);
  47 static int Control( demux_t *p_demux, int i_query, va_list args );
  48 static mtime_t strTimeToMTime( const char *psz );
  49
  50 /*****************************************************************************
  51  * Import_podcast: main import function
  52  *****************************************************************************/
  53 int Import_podcast( vlc_object_t *p_this )
  54 {
  55     demux_t *p_demux = (demux_t *)p_this;
  56
  57     if( !demux_IsForced( p_demux, "podcast" ) )
  58         return VLC_EGENERIC;
  59
  60     STANDARD_DEMUX_INIT_MSG( "using podcast reader" );
  61     p_demux->p_sys->p_xml = NULL;
  62     p_demux->p_sys->p_xml_reader = NULL;
  63
  64     return VLC_SUCCESS;
  65 }
  66
  67 /*****************************************************************************
  68  * Deactivate: frees unused data
  69  *****************************************************************************/
  70 void Close_podcast( vlc_object_t *p_this )
  71 {
  72     demux_t *p_demux = (demux_t *)p_this;
  73     demux_sys_t *p_sys = p_demux->p_sys;
  74
  75     if( p_sys->p_xml_reader ) xml_ReaderDelete( p_sys->p_xml, p_sys->p_xml_reader );
  76     if( p_sys->p_xml ) xml_Delete( p_sys->p_xml );
  77     free( p_sys );
  78 }
  79
  80 /* "specs" : http://phobos.apple.com/static/iTunesRSS.html */
  81 static int Demux( demux_t *p_demux )
  82 {
  83     demux_sys_t *p_sys = p_demux->p_sys;
  84
  85     bool b_item = false;
  86     bool b_image = false;
  87     int i_ret;
  88
  89     xml_t *p_xml;
  90     xml_reader_t *p_xml_reader;
  91     char *psz_elname = NULL;
  92     char *psz_item_mrl = NULL;
  93     char *psz_item_size = NULL;
  94     char *psz_item_type = NULL;
  95     char *psz_item_name = NULL;
  96     char *psz_item_date = NULL;
  97     char *psz_item_author = NULL;
  98     char *psz_item_category = NULL;
  99     char *psz_item_duration = NULL;
 100     char *psz_item_keywords = NULL;
 101     char *psz_item_subtitle = NULL;
 102     char *psz_item_summary = NULL;
 103     int i_type;
 104     input_item_t *p_input;
 105
 106     INIT_PLAYLIST_STUFF;
 107
 108     p_xml = p_sys->p_xml = xml_Create( p_demux );
 109     if( !p_xml ) return -1;
 110
 111 /*    psz_elname = stream_ReadLine( p_demux->s );
 112     if( psz_elname ) free( psz_elname );
 113     psz_elname = 0;*/
 114
 115     p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
 116     if( !p_xml_reader ) return -1;
 117     p_sys->p_xml_reader = p_xml_reader;
 118
 119     /* xml */
 120     /* check root node */
 121     if( xml_ReaderRead( p_xml_reader ) != 1 )
 122     {
 123         msg_Err( p_demux, "invalid file (no root node)" );
 124         return -1;
 125     }
 126
 127     while( xml_ReaderNodeType( p_xml_reader ) == XML_READER_NONE )
 128     {
 129         if( xml_ReaderRead( p_xml_reader ) != 1 )
 130         {
 131             msg_Err( p_demux, "invalid file (no root node)" );
 132             return -1;
 133         }
 134     }
 135
 136     if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
 137         ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
 138         strcmp( psz_elname, "rss" ) )
 139     {
 140         msg_Err( p_demux, "invalid root node %i, %s",
 141                  xml_ReaderNodeType( p_xml_reader ), psz_elname );
 142         free( psz_elname );
 143         return -1;
 144     }
 145     FREENULL( psz_elname );
 146
 147     while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 )
 148     {
 149         // Get the node type
 150         i_type = xml_ReaderNodeType( p_xml_reader );
 151         switch( i_type )
 152         {
 153             // Error
 154             case -1:
 155                 return -1;
 156                 break;
 157
 158             case XML_READER_STARTELEM:
 159             {
 160                 // Read the element name
 161                 free( psz_elname );
 162                 psz_elname = xml_ReaderName( p_xml_reader );
 163                 if( !psz_elname ) return -1;
 164
 165                 if( !strcmp( psz_elname, "item" ) )
 166                 {
 167                     b_item = true;
 168                 }
 169                 else if( !strcmp( psz_elname, "image" ) )
 170                 {
 171                     b_image = true;
 172                 }
 173
 174                 // Read the attributes
 175                 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 176                 {
 177                     char *psz_name = xml_ReaderName( p_xml_reader );
 178                     char *psz_value = xml_ReaderValue( p_xml_reader );
 179                     if( !psz_name || !psz_value )
 180                     {
 181                         free( psz_name );
 182                         free( psz_value );
 183                         free( psz_elname );
 184                         return -1;
 185                     }
 186
 187                     if( !strcmp( psz_elname, "enclosure" ) )
 188                     {
 189                         if( !strcmp( psz_name, "url" ) )
 190                         {
 191                             free( psz_item_mrl );
 192                             psz_item_mrl = strdup( psz_value );
 193                         }
 194                         else if( !strcmp( psz_name, "length" ) )
 195                         {
 196                             free( psz_item_size );
 197                             psz_item_size = strdup( psz_value );
 198                         }
 199                         else if( !strcmp( psz_name, "type" ) )
 200                         {
 201                             free( psz_item_type );
 202                             psz_item_type = strdup( psz_value );
 203                         }
 204                         else
 205                             msg_Dbg( p_demux,"unhandled attribure %s in element %s",
 206                                      psz_name, psz_elname );
 207                     }
 208                     else
 209                         msg_Dbg( p_demux,"unhandled attribure %s in element %s",
 210                                   psz_name, psz_elname );
 211
 212                     free( psz_name );
 213                     free( psz_value );
 214                 }
 215                 break;
 216             }
 217             case XML_READER_TEXT:
 218             {
 219                 char *psz_text = xml_ReaderValue( p_xml_reader );
 220
 221 #define SET_DATA( field, name )                 \
 222     else if( !strcmp( psz_elname, name ) )      \
 223     {                                           \
 224         field = psz_text;                       \
 225     }
 226                 /* item specific meta data */
 227                 if( b_item == true )
 228                 {
 229                     if( !strcmp( psz_elname, "title" ) )
 230                     {
 231                         psz_item_name = psz_text;
 232                     }
 233                     else if( !strcmp( psz_elname, "itunes:author" ) ||
 234                              !strcmp( psz_elname, "author" ) )
 235                     { /* <author> isn't standard iTunes podcast stuff */
 236                         psz_item_author = psz_text;
 237                     }
 238                     else if( !strcmp( psz_elname, "itunes:summary" ) ||
 239                              !strcmp( psz_elname, "description" ) )
 240                     { /* <description> isn't standard iTunes podcast stuff */
 241                         psz_item_summary = psz_text;
 242                     }
 243                     SET_DATA( psz_item_date, "pubDate" )
 244                     SET_DATA( psz_item_category, "itunes:category" )
 245                     SET_DATA( psz_item_duration, "itunes:duration" )
 246                     SET_DATA( psz_item_keywords, "itunes:keywords" )
 247                     SET_DATA( psz_item_subtitle, "itunes:subtitle" )
 248                     else
 249                         free( psz_text );
 250                 }
 251 #undef SET_DATA
 252
 253                 /* toplevel meta data */
 254                 else if( b_image == false )
 255                 {
 256                     if( !strcmp( psz_elname, "title" ) )
 257                     {
 258                         input_item_SetName( p_current_input, psz_text );
 259                     }
 260 #define ADD_GINFO( info, name ) \
 261     else if( !strcmp( psz_elname, name ) ) \
 262     { \
 263         input_item_AddInfo( p_current_input, _("Podcast Info"), \
 264                                 _( info ), "%s", psz_text ); \
 265     }
 266                     ADD_GINFO( "Podcast Link", "link" )
 267                     ADD_GINFO( "Podcast Copyright", "copyright" )
 268                     ADD_GINFO( "Podcast Category", "itunes:category" )
 269                     ADD_GINFO( "Podcast Keywords", "itunes:keywords" )
 270                     ADD_GINFO( "Podcast Subtitle", "itunes:subtitle" )
 271 #undef ADD_GINFO
 272                     else if( !strcmp( psz_elname, "itunes:summary" ) ||
 273                              !strcmp( psz_elname, "description" ) )
 274                     { /* <description> isn't standard iTunes podcast stuff */
 275                         input_item_AddInfo( p_current_input,
 276                             _( "Podcast Info" ), _( "Podcast Summary" ),
 277                             "%s", psz_text );
 278                     }
 279                     free( psz_text );
 280                 }
 281                 else
 282                 {
 283                     msg_Dbg( p_demux, "unhandled text in element '%s'",
 284                               psz_elname );
 285                     free( psz_text );
 286                 }
 287                 break;
 288             }
 289             // End element
 290             case XML_READER_ENDELEM:
 291             {
 292                 // Read the element name
 293                 free( psz_elname );
 294                 psz_elname = xml_ReaderName( p_xml_reader );
 295                 if( !psz_elname ) return -1;
 296                 if( !strcmp( psz_elname, "item" ) )
 297                 {
 298                     if( psz_item_mrl == NULL )
 299                     {
 300                         msg_Err( p_demux, "invalid XML (no enclosure markup)" );
 301                         free( psz_elname );
 302                         return -1;
 303                     }
 304                     p_input = input_item_New( p_demux, psz_item_mrl, psz_item_name );
 305                     if( p_input == NULL ) break;
 306 #define ADD_INFO( info, field ) \
 307     if( field ) { input_item_AddInfo( p_input, \
 308                             _( "Podcast Info" ),  _( info ), "%s", field ); }
 309                     ADD_INFO( "Podcast Publication Date", psz_item_date  );
 310                     ADD_INFO( "Podcast Author", psz_item_author );
 311                     ADD_INFO( "Podcast Subcategory", psz_item_category );
 312                     ADD_INFO( "Podcast Duration", psz_item_duration );
 313                     ADD_INFO( "Podcast Keywords", psz_item_keywords );
 314                     ADD_INFO( "Podcast Subtitle", psz_item_subtitle );
 315                     ADD_INFO( "Podcast Summary", psz_item_summary );
 316                     ADD_INFO( "Podcast Type", psz_item_type );
 317 #undef ADD_INFO
 318
 319                     /* Set the duration if available */
 320                     if( psz_item_duration )
 321                         input_item_SetDuration( p_input, strTimeToMTime( psz_item_duration ) );
 322
 323                     if( psz_item_size )
 324                     {
 325                         input_item_AddInfo( p_input,
 326                                                 _( "Podcast Info" ),
 327                                                 _( "Podcast Size" ),
 328                                                 "%s bytes",
 329                                                 psz_item_size );
 330                     }
 331                     input_item_AddSubItem( p_current_input, p_input );
 332                     vlc_gc_decref( p_input );
 333                     FREENULL( psz_item_name );
 334                     FREENULL( psz_item_mrl );
 335                     FREENULL( psz_item_size );
 336                     FREENULL( psz_item_type );
 337                     FREENULL( psz_item_date );
 338                     FREENULL( psz_item_author );
 339                     FREENULL( psz_item_category );
 340                     FREENULL( psz_item_duration );
 341                     FREENULL( psz_item_keywords );
 342                     FREENULL( psz_item_subtitle );
 343                     FREENULL( psz_item_summary );
 344                     b_item = false;
 345                 }
 346                 else if( !strcmp( psz_elname, "image" ) )
 347                 {
 348                     b_image = false;
 349                 }
 350                 free( psz_elname );
 351                 psz_elname = strdup( "" );
 352
 353                 break;
 354             }
 355         }
 356     }
 357
 358     if( i_ret != 0 )
 359     {
 360         msg_Warn( p_demux, "error while parsing data" );
 361     }
 362
 363     free( psz_elname );
 364
 365     HANDLE_PLAY_AND_RELEASE;
 366     return 0; /* Needed for correct operation of go back */
 367 }
 368
 369 static int Control( demux_t *p_demux, int i_query, va_list args )
 370 {
 371     VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
 372     return VLC_EGENERIC;
 373 }
 374
 375 static mtime_t strTimeToMTime( const char *psz )
 376 {
 377     int h, m, s;
 378     switch( sscanf( psz, "%u:%u:%u", &h, &m, &s ) )
 379     {
 380     case 3:
 381         return (mtime_t)( ( h*60 + m )*60 + s ) * 1000000;
 382     case 2:
 383         return (mtime_t)( h*60 + m ) * 1000000;
 384         break;
 385     default:
 386         return -1;
 387     }
 388 }