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_t *p_xml;
  83     xml_reader_t *p_xml_reader = NULL;
  84     char *psz_eltname = NULL;
  85     int i_ret = -1;
  86     input_item_t *p_current_input = GetCurrentItem(p_demux);
  87     input_item_node_t *p_input_node = NULL;
  88
  89     p_xml = xml_Create( p_demux );
  90     if( !p_xml )
  91         goto error;
  92
  93     p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
  94     if( !p_xml_reader )
  95         goto error;
  96
  97     /* check root node */
  98     if( xml_ReaderRead( p_xml_reader ) != 1 )
  99     {
 100         msg_Err( p_demux, "invalid file (no root node)" );
 101         goto error;
 102     }
 103
 104     if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
 105         ( psz_eltname = xml_ReaderName( p_xml_reader ) ) == NULL ||
 106         ( strcmp( psz_eltname, "genrelist" )
 107           && strcmp( psz_eltname, "stationlist" ) ) )
 108     {
 109         msg_Err( p_demux, "invalid root node %i, %s",
 110                  xml_ReaderNodeType( p_xml_reader ), psz_eltname );
 111         goto error;
 112     }
 113
 114     p_input_node = input_item_node_Create( p_current_input );
 115
 116     if( !strcmp( psz_eltname, "genrelist" ) )
 117     {
 118         /* we're reading a genre list */
 119         if( DemuxGenre( p_demux, p_xml_reader, p_input_node ) )
 120             goto error;
 121     }
 122     else
 123     {
 124         /* we're reading a station list */
 125         if( DemuxStation( p_demux, p_xml_reader, p_input_node,
 126                 var_InheritBool( p_demux, "shoutcast-show-adult" ) ) )
 127             goto error;
 128     }
 129
 130     input_item_node_PostAndDelete( p_input_node );
 131     p_input_node = NULL;
 132
 133     i_ret = 0; /* Needed for correct operation of go back */
 134
 135 error:
 136     if( p_xml_reader )
 137         xml_ReaderDelete( p_xml_reader );
 138     if( p_xml )
 139         xml_Delete( p_xml );
 140     free( psz_eltname );
 141     if( p_input_node ) input_item_node_Delete( p_input_node );
 142     vlc_gc_decref(p_current_input);
 143     return i_ret;
 144 }
 145
 146 #define GET_VALUE( a ) \
 147                         if( !strcmp( psz_attrname, #a ) ) \
 148                         { \
 149                             free(psz_ ## a); \
 150                             psz_ ## a = psz_attrvalue; \
 151                         }
 152 /* <genrelist>
 153  *   <genre name="the name"></genre>
 154  *   ...
 155  * </genrelist>
 156  **/
 157 static int DemuxGenre( demux_t *p_demux, xml_reader_t *p_xml_reader,
 158                        input_item_node_t *p_input_node )
 159 {
 160     char *psz_name = NULL; /* genre name */
 161     int i_ret = -1;
 162
 163     while( xml_ReaderRead( p_xml_reader ) == 1 )
 164     {
 165         // Get the node type
 166         switch( xml_ReaderNodeType( p_xml_reader ) )
 167         {
 168             // Error
 169             case -1:
 170                 goto error;
 171
 172             case XML_READER_STARTELEM:
 173             {
 174                 // Read the element name
 175                 char *psz_eltname = xml_ReaderName( p_xml_reader );
 176                 if( !psz_eltname )
 177                     goto error;
 178
 179                 if( !strcmp( psz_eltname, "genre" ) )
 180                 {
 181                     // Read the attributes
 182                     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 183                     {
 184                         char *psz_attrname = xml_ReaderName( p_xml_reader );
 185                         char *psz_attrvalue =
 186                             xml_ReaderValue( p_xml_reader );
 187                         if( !psz_attrname || !psz_attrvalue )
 188                         {
 189                             free( psz_attrname );
 190                             free( psz_attrvalue );
 191                             free( psz_eltname );
 192                             break;
 193                         }
 194
 195                         GET_VALUE( name )
 196                         else
 197                         {
 198                             msg_Warn( p_demux,
 199                                       "unexpected attribute %s in element %s",
 200                                       psz_attrname, psz_eltname );
 201                             free( psz_attrvalue );
 202                         }
 203                         free( psz_attrname );
 204                     }
 205                 }
 206                 free( psz_eltname );
 207                 break;
 208             }
 209
 210             case XML_READER_TEXT:
 211                 break;
 212
 213             // End element
 214             case XML_READER_ENDELEM:
 215             {
 216                 // Read the element name
 217                 char *psz_eltname = xml_ReaderName( p_xml_reader );
 218                 if( !psz_eltname )
 219                     goto error;
 220
 221                 if( !strcmp( psz_eltname, "genre" ) )
 222                 {
 223                     char* psz_mrl;
 224                     if( asprintf( &psz_mrl, SHOUTCAST_BASE_URL "?genre=%s",
 225                              psz_name ) != -1 )
 226                     {
 227                         input_item_t *p_input;
 228                         p_input = input_item_New( p_demux, psz_mrl, psz_name );
 229                         input_item_CopyOptions( p_input_node->p_item, p_input );
 230                         free( psz_mrl );
 231                         input_item_node_AppendItem( p_input_node, p_input );
 232                         vlc_gc_decref( p_input );
 233                     }
 234                     FREENULL( psz_name );
 235                 }
 236                 free( psz_eltname );
 237                 break;
 238             }
 239         }
 240     }
 241     i_ret = 0;
 242
 243 error:
 244     free( psz_name );
 245     return i_ret;
 246 }
 247
 248 /* radio stations:
 249  * <stationlist>
 250  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 251  *   <station name="the name"
 252  *            mt="mime type"
 253  *            id="the id"
 254  *            br="bit rate"
 255  *            genre="A big genre string"
 256  *            ct="current track name/author/..."
 257  *            lc="listener count"></station>
 258  * </stationlist>
 259  *
 260  * TV stations:
 261  * <stationlist>
 262  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 263  *   <station name="the name"
 264  *            id="the id"
 265  *            br="bit rate"
 266  *            rt="rating"
 267  *            load="server load ?"
 268  *            ct="current track name/author/..."
 269  *            genre="A big genre string"
 270  *            lc="listener count"></station>
 271  * </stationlist>
 272  **/
 273 static int DemuxStation( demux_t *p_demux, xml_reader_t *p_xml_reader,
 274                          input_item_node_t *p_input_node, bool b_adult )
 275 {
 276     char *psz_base = NULL; /* */
 277
 278     char *psz_name = NULL; /* genre name */
 279     char *psz_mt = NULL; /* mime type */
 280     char *psz_id = NULL; /* id */
 281     char *psz_br = NULL; /* bit rate */
 282     char *psz_genre = NULL; /* genre */
 283     char *psz_ct = NULL; /* current track */
 284     char *psz_lc = NULL; /* listener count */
 285
 286     /* If these are set then it's *not* a radio but a TV */
 287     char *psz_rt = NULL; /* rating for shoutcast TV */
 288     char *psz_load = NULL; /* load for shoutcast TV */
 289
 290     char *psz_eltname = NULL; /* tag name */
 291
 292     while( xml_ReaderRead( p_xml_reader ) == 1 )
 293     {
 294         int i_type;
 295
 296         // Get the node type
 297         i_type = xml_ReaderNodeType( p_xml_reader );
 298         switch( i_type )
 299         {
 300             // Error
 301             case -1:
 302                 return -1;
 303                 break;
 304
 305             case XML_READER_STARTELEM:
 306                 // Read the element name
 307                 psz_eltname = xml_ReaderName( p_xml_reader );
 308                 if( !psz_eltname ) return -1;
 309
 310                 // Read the attributes
 311                 if( !strcmp( psz_eltname, "tunein" ) )
 312                 {
 313                     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 314                     {
 315                         char *psz_attrname = xml_ReaderName( p_xml_reader );
 316                         char *psz_attrvalue =
 317                             xml_ReaderValue( p_xml_reader );
 318                         if( !psz_attrname || !psz_attrvalue )
 319                         {
 320                             free( psz_eltname );
 321                             free( psz_attrname );
 322                             free( psz_attrvalue );
 323                             return -1;
 324                         }
 325
 326                         GET_VALUE( base )
 327                         else
 328                         {
 329                             msg_Warn( p_demux,
 330                                       "unexpected attribute %s in element %s",
 331                                       psz_attrname, psz_eltname );
 332                             free( psz_attrvalue );
 333                         }
 334                         free( psz_attrname );
 335                     }
 336                 }
 337                 else if( !strcmp( psz_eltname, "station" ) )
 338                 {
 339                     while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
 340                     {
 341                         char *psz_attrname = xml_ReaderName( p_xml_reader );
 342                         char *psz_attrvalue =
 343                             xml_ReaderValue( p_xml_reader );
 344                         if( !psz_attrname || !psz_attrvalue )
 345                         {
 346                             free( psz_eltname );
 347                             free( psz_attrname );
 348                             free( psz_attrvalue );
 349                             return -1;
 350                         }
 351
 352                         GET_VALUE( name )
 353                         else GET_VALUE( mt )
 354                         else GET_VALUE( id )
 355                         else GET_VALUE( br )
 356                         else GET_VALUE( genre )
 357                         else GET_VALUE( ct )
 358                         else GET_VALUE( lc )
 359                         else GET_VALUE( rt )
 360                         else GET_VALUE( load )
 361                         else
 362                         {
 363                             msg_Warn( p_demux,
 364                                       "unexpected attribute %s in element %s",
 365                                       psz_attrname, psz_eltname );
 366                             free( psz_attrvalue );
 367                         }
 368                         free( psz_attrname );
 369                     }
 370                 }
 371                 free( psz_eltname );
 372                 break;
 373
 374             case XML_READER_TEXT:
 375                 break;
 376
 377             // End element
 378             case XML_READER_ENDELEM:
 379                 // Read the element name
 380                 psz_eltname = xml_ReaderName( p_xml_reader );
 381                 if( !psz_eltname ) return -1;
 382                 if( !strcmp( psz_eltname, "station" ) &&
 383                     ( psz_base || ( psz_rt && psz_load &&
 384                     ( b_adult || strcmp( psz_rt, "NC17" ) ) ) ) )
 385                 {
 386                     char *psz_mrl = NULL;
 387                     if( psz_rt || psz_load )
 388                     {
 389                         /* tv */
 390                         if( asprintf( &psz_mrl, SHOUTCAST_TV_TUNEIN_URL "%s",
 391                                  psz_id ) == -1)
 392                             psz_mrl = NULL;
 393                     }
 394                     else
 395                     {
 396                         /* radio */
 397                         if( asprintf( &psz_mrl, SHOUTCAST_TUNEIN_BASE_URL "%s?id=%s",
 398                              psz_base, psz_id ) == -1 )
 399                             psz_mrl = NULL;
 400                     }
 401
 402                     /* Create the item */
 403                     input_item_t *p_input;
 404                     p_input = input_item_New( p_demux, psz_mrl, psz_name );
 405                     input_item_CopyOptions( p_input_node->p_item, p_input );
 406                     free( psz_mrl );
 407
 408 #define SADD_INFO( type, field ) \
 409                     if( field ) \
 410                         input_item_AddInfo( p_input, _("Shoutcast"), \
 411                                             vlc_gettext(type), "%s", field )
 412                     SADD_INFO( N_("Mime"), psz_mt );
 413                     SADD_INFO( N_("Bitrate"), psz_br );
 414                     SADD_INFO( N_("Listeners"), psz_lc );
 415                     SADD_INFO( N_("Load"), psz_load );
 416                     if( psz_genre )
 417                         input_item_SetGenre( p_input, psz_genre );
 418                     if( psz_ct )
 419                         input_item_SetNowPlaying( p_input, psz_ct );
 420                     if( psz_rt )
 421                         input_item_SetRating( p_input, psz_rt );
 422                     input_item_node_AppendItem( p_input_node, p_input );
 423                     vlc_gc_decref( p_input );
 424                     FREENULL( psz_base );
 425                     FREENULL( psz_name );
 426                     FREENULL( psz_mt );
 427                     FREENULL( psz_id );
 428                     FREENULL( psz_br );
 429                     FREENULL( psz_genre );
 430                     FREENULL( psz_ct );
 431                     FREENULL( psz_lc );
 432                     FREENULL( psz_rt );
 433                     FREENULL( psz_load );
 434                 }
 435                 free( psz_eltname );
 436                 break;
 437         }
 438     }
 439     return 0;
 440 }
 441
 442 static int Control( demux_t *p_demux, int i_query, va_list args )
 443 {
 444     VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
 445     return VLC_EGENERIC;
 446 }