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 static int Control( demux_t *p_demux, int i_query, va_list args );
  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 /*****************************************************************************
  73  * Deactivate: frees unused data
  74  *****************************************************************************/
  75 void Close_Shoutcast( vlc_object_t *p_this )
  76 {
  77     (void)p_this;
  78 }
  79
  80 static int Demux( demux_t *p_demux )
  81 {
  82     xml_reader_t *p_xml_reader = NULL;
  83     const char *node;
  84     int i_ret = -1;
  85     input_item_t *p_current_input = GetCurrentItem(p_demux);
  86     input_item_node_t *p_input_node = NULL;
  87
  88     p_xml_reader = xml_ReaderCreate( p_demux, p_demux->s );
  89     if( !p_xml_reader )
  90         goto error;
  91
  92     /* check root node */
  93     if( xml_ReaderNextNode( p_xml_reader, &node ) != XML_READER_STARTELEM )
  94     {
  95         msg_Err( p_demux, "invalid file (no root node)" );
  96         goto error;
  97     }
  98
  99     if( strcmp( node, "genrelist" ) && strcmp( node, "stationlist" ) )
 100     {
 101         msg_Err( p_demux, "invalid root node <%s>", node );
 102         goto error;
 103     }
 104
 105     p_input_node = input_item_node_Create( p_current_input );
 106
 107     if( !strcmp( node, "genrelist" ) )
 108     {
 109         /* we're reading a genre list */
 110         if( DemuxGenre( p_demux, p_xml_reader, p_input_node ) )
 111             goto error;
 112     }
 113     else
 114     {
 115         /* we're reading a station list */
 116         if( DemuxStation( p_demux, p_xml_reader, p_input_node,
 117                 var_InheritBool( p_demux, "shoutcast-show-adult" ) ) )
 118             goto error;
 119     }
 120
 121     input_item_node_PostAndDelete( p_input_node );
 122     p_input_node = NULL;
 123
 124     i_ret = 0; /* Needed for correct operation of go back */
 125
 126 error:
 127     if( p_xml_reader )
 128         xml_ReaderDelete( p_xml_reader );
 129     if( p_input_node ) input_item_node_Delete( p_input_node );
 130     vlc_gc_decref(p_current_input);
 131     return i_ret;
 132 }
 133
 134 /* <genrelist>
 135  *   <genre name="the name"></genre>
 136  *   ...
 137  * </genrelist>
 138  **/
 139 static int DemuxGenre( demux_t *p_demux, xml_reader_t *p_xml_reader,
 140                        input_item_node_t *p_input_node )
 141 {
 142     const char *node;
 143     char *psz_name = NULL; /* genre name */
 144     int type;
 145
 146     while( (type = xml_ReaderNextNode( p_xml_reader, &node )) > 0 )
 147     {
 148         switch( type )
 149         {
 150             case XML_READER_STARTELEM:
 151             {
 152                 if( !strcmp( node, "genre" ) )
 153                 {
 154                     // Read the attributes
 155                     const char *name, *value;
 156                     while( (name = xml_ReaderNextAttr( p_xml_reader, &value )) )
 157                     {
 158                         if( !strcmp( name, "name" ) )
 159                         {
 160                             free(psz_name);
 161                             psz_name = strdup( value );
 162                         }
 163                         else
 164                             msg_Warn( p_demux,
 165                                       "unexpected attribute %s in <%s>",
 166                                       name, node );
 167                     }
 168                 }
 169                 break;
 170             }
 171
 172             case XML_READER_ENDELEM:
 173                 if( !strcmp( node, "genre" ) && psz_name != NULL )
 174                 {
 175                     char* psz_mrl;
 176
 177                     if( asprintf( &psz_mrl, SHOUTCAST_BASE_URL "?genre=%s",
 178                                   psz_name ) != -1 )
 179                     {
 180                         input_item_t *p_input;
 181                         p_input = input_item_New( p_demux, psz_mrl, psz_name );
 182                         input_item_CopyOptions( p_input_node->p_item, p_input );
 183                         free( psz_mrl );
 184                         input_item_node_AppendItem( p_input_node, p_input );
 185                         vlc_gc_decref( p_input );
 186                     }
 187                     FREENULL( psz_name );
 188                 }
 189                 break;
 190         }
 191     }
 192
 193     free( psz_name );
 194     return 0;
 195 }
 196
 197 /* radio stations:
 198  * <stationlist>
 199  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 200  *   <station name="the name"
 201  *            mt="mime type"
 202  *            id="the id"
 203  *            br="bit rate"
 204  *            genre="A big genre string"
 205  *            ct="current track name/author/..."
 206  *            lc="listener count"></station>
 207  * </stationlist>
 208  *
 209  * TV stations:
 210  * <stationlist>
 211  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 212  *   <station name="the name"
 213  *            id="the id"
 214  *            br="bit rate"
 215  *            rt="rating"
 216  *            load="server load ?"
 217  *            ct="current track name/author/..."
 218  *            genre="A big genre string"
 219  *            lc="listener count"></station>
 220  * </stationlist>
 221  **/
 222 static int DemuxStation( demux_t *p_demux, xml_reader_t *p_xml_reader,
 223                          input_item_node_t *p_input_node, bool b_adult )
 224 {
 225     char *psz_base = NULL; /* */
 226
 227     char *psz_name = NULL; /* genre name */
 228     char *psz_mt = NULL; /* mime type */
 229     char *psz_id = NULL; /* id */
 230     char *psz_br = NULL; /* bit rate */
 231     char *psz_genre = NULL; /* genre */
 232     char *psz_ct = NULL; /* current track */
 233     char *psz_lc = NULL; /* listener count */
 234
 235     /* If these are set then it's *not* a radio but a TV */
 236     char *psz_rt = NULL; /* rating for shoutcast TV */
 237     char *psz_load = NULL; /* load for shoutcast TV */
 238
 239     const char *node; /* tag name */
 240     int i_type;
 241
 242     while( (i_type = xml_ReaderNextNode( p_xml_reader, &node )) > 0 )
 243     {
 244         switch( i_type )
 245         {
 246             case XML_READER_STARTELEM:
 247                 // Read the attributes
 248                 if( !strcmp( node, "tunein" ) )
 249                 {
 250                     const char *name, *value;
 251                     while( (name = xml_ReaderNextAttr( p_xml_reader, &value )) )
 252                     {
 253                         if( !strcmp( name, "base" ) )
 254                         {
 255                             free( psz_base );
 256                             psz_base = strdup( value );
 257                         }
 258                         else
 259                             msg_Warn( p_demux,
 260                                       "unexpected attribute %s in <%s>",
 261                                       name, node );
 262                     }
 263                 }
 264                 else if( !strcmp( node, "station" ) )
 265                 {
 266                     const char *name, *value;
 267                     while( (name = xml_ReaderNextAttr( p_xml_reader, &value )) )
 268                     {
 269                         char **p = NULL;
 270                         if( !strcmp( name, "name" ) )
 271                             p = &psz_name;
 272                         else if ( !strcmp( name, "mt" ) )
 273                             p = &psz_mt;
 274                         else if ( !strcmp( name, "id" ) )
 275                             p = &psz_id;
 276                         else if ( !strcmp( name, "br" ) )
 277                             p = &psz_br;
 278                         else if ( !strcmp( name, "genre" ) )
 279                             p = &psz_genre;
 280                         else if ( !strcmp( name, "ct" ) )
 281                             p = &psz_ct;
 282                         else if ( !strcmp( name, "lc" ) )
 283                             p = &psz_lc;
 284                         else if ( !strcmp( name, "rt" ) )
 285                             p = &psz_rt;
 286                         else if ( !strcmp( name, "load" ) )
 287                             p = &psz_load;
 288                         if( p != NULL )
 289                         {
 290                             free( *p );
 291                             *p = strdup( value );
 292                         }
 293                         else
 294                             msg_Warn( p_demux,
 295                                       "unexpected attribute %s in <%s>",
 296                                       name, node );
 297                     }
 298                 }
 299                 break;
 300
 301             // End element
 302             case XML_READER_ENDELEM:
 303                 if( !strcmp( node, "station" ) &&
 304                     ( psz_base || ( psz_rt && psz_load &&
 305                     ( b_adult || strcmp( psz_rt, "NC17" ) ) ) ) )
 306                 {
 307                     char *psz_mrl = NULL;
 308                     if( psz_rt || psz_load )
 309                     {
 310                         /* tv */
 311                         if( asprintf( &psz_mrl, SHOUTCAST_TV_TUNEIN_URL "%s",
 312                                  psz_id ) == -1)
 313                             psz_mrl = NULL;
 314                     }
 315                     else
 316                     {
 317                         /* radio */
 318                         if( asprintf( &psz_mrl, SHOUTCAST_TUNEIN_BASE_URL "%s?id=%s",
 319                              psz_base, psz_id ) == -1 )
 320                             psz_mrl = NULL;
 321                     }
 322
 323                     /* Create the item */
 324                     input_item_t *p_input;
 325                     p_input = input_item_New( p_demux, psz_mrl, psz_name );
 326                     input_item_CopyOptions( p_input_node->p_item, p_input );
 327                     free( psz_mrl );
 328
 329 #define SADD_INFO( type, field ) \
 330                     if( field ) \
 331                         input_item_AddInfo( p_input, _("Shoutcast"), \
 332                                             vlc_gettext(type), "%s", field )
 333                     SADD_INFO( N_("Mime"), psz_mt );
 334                     SADD_INFO( N_("Bitrate"), psz_br );
 335                     SADD_INFO( N_("Listeners"), psz_lc );
 336                     SADD_INFO( N_("Load"), psz_load );
 337                     if( psz_genre )
 338                         input_item_SetGenre( p_input, psz_genre );
 339                     if( psz_ct )
 340                         input_item_SetNowPlaying( p_input, psz_ct );
 341                     if( psz_rt )
 342                         input_item_SetRating( p_input, psz_rt );
 343                     input_item_node_AppendItem( p_input_node, p_input );
 344                     vlc_gc_decref( p_input );
 345                     FREENULL( psz_base );
 346                     FREENULL( psz_name );
 347                     FREENULL( psz_mt );
 348                     FREENULL( psz_id );
 349                     FREENULL( psz_br );
 350                     FREENULL( psz_genre );
 351                     FREENULL( psz_ct );
 352                     FREENULL( psz_lc );
 353                     FREENULL( psz_rt );
 354                     FREENULL( psz_load );
 355                 }
 356                 break;
 357         }
 358     }
 359     /* FIXME: leaks on missing ENDELEMENT? */
 360     return 0;
 361 }
 362
 363 static int Control( demux_t *p_demux, int i_query, va_list args )
 364 {
 365     VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
 366     return VLC_EGENERIC;
 367 }