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