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

   1 /*****************************************************************************
   2  * shoutcast.c: Winamp >=5.2 shoutcast demuxer
   3  *****************************************************************************
   4  * Copyright (C) 2006 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea -@t- videolan -Dot- org>
   8  *          based on b4s.c by Sigmund Augdal Helberg <dnumgis@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_demux.h>
  35
  36 #include "playlist.h"
  37 #include <vlc_xml.h>
  38 #include <vlc_strings.h>
  39
  40 /* duplicate from modules/services_discovery/shout.c */
  41 #define SHOUTCAST_BASE_URL "http/shout-winamp://www.shoutcast.com/sbin/newxml.phtml"
  42 #define SHOUTCAST_TUNEIN_BASE_URL "http://www.shoutcast.com"
  43 #define SHOUTCAST_TV_TUNEIN_URL "http://www.shoutcast.com/sbin/tunein-tvstation.pls?id="
  44
  45 /*****************************************************************************
  46  * Local prototypes
  47  *****************************************************************************/
  48 static int Demux( demux_t *p_demux);
  49
  50 static int DemuxGenre( demux_t *p_demux, xml_reader_t *p_xml_reader,
  51                        input_item_node_t *p_input_node );
  52 static int DemuxStation( demux_t *p_demux, xml_reader_t *p_xml_reader,
  53                          input_item_node_t *p_input_node, bool b_adult );
  54
  55 /*****************************************************************************
  56  * Import_Shoutcast: main import function
  57  *****************************************************************************/
  58 int Import_Shoutcast( vlc_object_t *p_this )
  59 {
  60     demux_t *p_demux = (demux_t *)p_this;
  61
  62     if( !demux_IsForced( p_demux, "shout-winamp" ) )
  63         return VLC_EGENERIC;
  64
  65     p_demux->pf_demux = Demux;
  66     p_demux->pf_control = Control;
  67     msg_Dbg( p_demux, "using shoutcast playlist reader" );
  68
  69     return VLC_SUCCESS;
  70 }
  71
  72 static int Demux( demux_t *p_demux )
  73 {
  74     xml_reader_t *p_xml_reader = NULL;
  75     const char *node;
  76     int i_ret = -1;
  77     input_item_t *p_current_input = GetCurrentItem(p_demux);
  78     input_item_node_t *p_input_node = NULL;
  79
  80     p_xml_reader = xml_ReaderCreate( p_demux, p_demux->s );
  81     if( !p_xml_reader )
  82         goto error;
  83
  84     /* check root node */
  85     if( xml_ReaderNextNode( p_xml_reader, &node ) != XML_READER_STARTELEM )
  86     {
  87         msg_Err( p_demux, "invalid file (no root node)" );
  88         goto error;
  89     }
  90
  91     if( strcmp( node, "genrelist" ) && strcmp( node, "stationlist" ) )
  92     {
  93         msg_Err( p_demux, "invalid root node <%s>", node );
  94         goto error;
  95     }
  96
  97     p_input_node = input_item_node_Create( p_current_input );
  98
  99     if( !strcmp( node, "genrelist" ) )
 100     {
 101         /* we're reading a genre list */
 102         if( DemuxGenre( p_demux, p_xml_reader, p_input_node ) )
 103             goto error;
 104     }
 105     else
 106     {
 107         /* we're reading a station list */
 108         if( DemuxStation( p_demux, p_xml_reader, p_input_node,
 109                 var_InheritBool( p_demux, "shoutcast-show-adult" ) ) )
 110             goto error;
 111     }
 112
 113     input_item_node_PostAndDelete( p_input_node );
 114     p_input_node = NULL;
 115
 116     i_ret = 0; /* Needed for correct operation of go back */
 117
 118 error:
 119     if( p_xml_reader )
 120         xml_ReaderDelete( p_xml_reader );
 121     if( p_input_node ) input_item_node_Delete( p_input_node );
 122     vlc_gc_decref(p_current_input);
 123     return i_ret;
 124 }
 125
 126 /* <genrelist>
 127  *   <genre name="the name"></genre>
 128  *   ...
 129  * </genrelist>
 130  **/
 131 static int DemuxGenre( demux_t *p_demux, xml_reader_t *p_xml_reader,
 132                        input_item_node_t *p_input_node )
 133 {
 134     const char *node;
 135     char *psz_name = NULL; /* genre name */
 136     int type;
 137
 138     while( (type = xml_ReaderNextNode( p_xml_reader, &node )) > 0 )
 139     {
 140         switch( type )
 141         {
 142             case XML_READER_STARTELEM:
 143             {
 144                 if( !strcmp( node, "genre" ) )
 145                 {
 146                     // Read the attributes
 147                     const char *name, *value;
 148                     while( (name = xml_ReaderNextAttr( p_xml_reader, &value )) )
 149                     {
 150                         if( !strcmp( name, "name" ) )
 151                         {
 152                             free(psz_name);
 153                             psz_name = strdup( value );
 154                         }
 155                         else
 156                             msg_Warn( p_demux,
 157                                       "unexpected attribute %s in <%s>",
 158                                       name, node );
 159                     }
 160                 }
 161                 break;
 162             }
 163
 164             case XML_READER_ENDELEM:
 165                 if( !strcmp( node, "genre" ) && psz_name != NULL )
 166                 {
 167                     char* psz_mrl;
 168
 169                     if( asprintf( &psz_mrl, SHOUTCAST_BASE_URL "?genre=%s",
 170                                   psz_name ) != -1 )
 171                     {
 172                         input_item_t *p_input;
 173                         resolve_xml_special_chars( psz_mrl );
 174                         p_input = input_item_New( psz_mrl, psz_name );
 175                         input_item_CopyOptions( p_input_node->p_item, p_input );
 176                         free( psz_mrl );
 177                         input_item_node_AppendItem( p_input_node, p_input );
 178                         vlc_gc_decref( p_input );
 179                     }
 180                     FREENULL( psz_name );
 181                 }
 182                 break;
 183         }
 184     }
 185
 186     free( psz_name );
 187     return 0;
 188 }
 189
 190 /* radio stations:
 191  * <stationlist>
 192  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 193  *   <station name="the name"
 194  *            mt="mime type"
 195  *            id="the id"
 196  *            br="bit rate"
 197  *            genre="A big genre string"
 198  *            ct="current track name/author/..."
 199  *            lc="listener count"></station>
 200  * </stationlist>
 201  *
 202  * TV stations:
 203  * <stationlist>
 204  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 205  *   <station name="the name"
 206  *            id="the id"
 207  *            br="bit rate"
 208  *            rt="rating"
 209  *            load="server load ?"
 210  *            ct="current track name/author/..."
 211  *            genre="A big genre string"
 212  *            lc="listener count"></station>
 213  * </stationlist>
 214  **/
 215 static int DemuxStation( demux_t *p_demux, xml_reader_t *p_xml_reader,
 216                          input_item_node_t *p_input_node, bool b_adult )
 217 {
 218     char *psz_base = NULL; /* */
 219
 220     char *psz_name = NULL; /* genre name */
 221     char *psz_mt = NULL; /* mime type */
 222     char *psz_id = NULL; /* id */
 223     char *psz_br = NULL; /* bit rate */
 224     char *psz_genre = NULL; /* genre */
 225     char *psz_ct = NULL; /* current track */
 226     char *psz_lc = NULL; /* listener count */
 227
 228     /* If these are set then it's *not* a radio but a TV */
 229     char *psz_rt = NULL; /* rating for shoutcast TV */
 230     char *psz_load = NULL; /* load for shoutcast TV */
 231
 232     const char *node; /* tag name */
 233     int i_type;
 234
 235     while( (i_type = xml_ReaderNextNode( p_xml_reader, &node )) > 0 )
 236     {
 237         switch( i_type )
 238         {
 239             case XML_READER_STARTELEM:
 240                 // Read the attributes
 241                 if( !strcmp( node, "tunein" ) )
 242                 {
 243                     const char *name, *value;
 244                     while( (name = xml_ReaderNextAttr( p_xml_reader, &value )) )
 245                     {
 246                         if( !strcmp( name, "base" ) )
 247                         {
 248                             free( psz_base );
 249                             psz_base = strdup( value );
 250                         }
 251                         else
 252                             msg_Warn( p_demux,
 253                                       "unexpected attribute %s in <%s>",
 254                                       name, node );
 255                     }
 256                 }
 257                 else if( !strcmp( node, "station" ) )
 258                 {
 259                     const char *name, *value;
 260                     while( (name = xml_ReaderNextAttr( p_xml_reader, &value )) )
 261                     {
 262                         char **p = NULL;
 263                         if( !strcmp( name, "name" ) )
 264                             p = &psz_name;
 265                         else if ( !strcmp( name, "mt" ) )
 266                             p = &psz_mt;
 267                         else if ( !strcmp( name, "id" ) )
 268                             p = &psz_id;
 269                         else if ( !strcmp( name, "br" ) )
 270                             p = &psz_br;
 271                         else if ( !strcmp( name, "genre" ) )
 272                             p = &psz_genre;
 273                         else if ( !strcmp( name, "ct" ) )
 274                             p = &psz_ct;
 275                         else if ( !strcmp( name, "lc" ) )
 276                             p = &psz_lc;
 277                         else if ( !strcmp( name, "rt" ) )
 278                             p = &psz_rt;
 279                         else if ( !strcmp( name, "load" ) )
 280                             p = &psz_load;
 281                         if( p != NULL )
 282                         {
 283                             free( *p );
 284                             *p = strdup( value );
 285                         }
 286                         else
 287                             msg_Warn( p_demux,
 288                                       "unexpected attribute %s in <%s>",
 289                                       name, node );
 290                     }
 291                 }
 292                 break;
 293
 294             // End element
 295             case XML_READER_ENDELEM:
 296                 if( !strcmp( node, "station" ) &&
 297                     ( psz_base || ( psz_rt && psz_load &&
 298                     ( b_adult || strcmp( psz_rt, "NC17" ) ) ) ) )
 299                 {
 300                     char *psz_mrl = NULL;
 301                     if( psz_rt || psz_load )
 302                     {
 303                         /* tv */
 304                         if( asprintf( &psz_mrl, SHOUTCAST_TV_TUNEIN_URL "%s",
 305                                  psz_id ) == -1)
 306                             psz_mrl = NULL;
 307                     }
 308                     else
 309                     {
 310                         /* radio */
 311                         if( asprintf( &psz_mrl, SHOUTCAST_TUNEIN_BASE_URL "%s?id=%s",
 312                              psz_base, psz_id ) == -1 )
 313                             psz_mrl = NULL;
 314                     }
 315
 316                     /* Create the item */
 317                     input_item_t *p_input;
 318                     resolve_xml_special_chars( psz_mrl );
 319                     p_input = input_item_New( psz_mrl, psz_name );
 320                     input_item_CopyOptions( p_input_node->p_item, p_input );
 321                     free( psz_mrl );
 322
 323 #define SADD_INFO( type, field ) \
 324                     if( field ) \
 325                         input_item_AddInfo( p_input, _("Shoutcast"), \
 326                                             vlc_gettext(type), "%s", field )
 327                     SADD_INFO( N_("Mime"), psz_mt );
 328                     SADD_INFO( N_("Bitrate"), psz_br );
 329                     SADD_INFO( N_("Listeners"), psz_lc );
 330                     SADD_INFO( N_("Load"), psz_load );
 331                     if( psz_genre )
 332                         input_item_SetGenre( p_input, psz_genre );
 333                     if( psz_ct )
 334                         input_item_SetNowPlaying( p_input, psz_ct );
 335                     if( psz_rt )
 336                         input_item_SetRating( p_input, psz_rt );
 337                     input_item_node_AppendItem( p_input_node, p_input );
 338                     vlc_gc_decref( p_input );
 339                     FREENULL( psz_base );
 340                     FREENULL( psz_name );
 341                     FREENULL( psz_mt );
 342                     FREENULL( psz_id );
 343                     FREENULL( psz_br );
 344                     FREENULL( psz_genre );
 345                     FREENULL( psz_ct );
 346                     FREENULL( psz_lc );
 347                     FREENULL( psz_rt );
 348                     FREENULL( psz_load );
 349                 }
 350                 break;
 351         }
 352     }
 353     /* FIXME: leaks on missing ENDELEMENT? */
 354     return 0;
 355 }