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 #include <ctype.h>                                              /* isspace() */
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/input.h>
  32 #include <vlc/intf.h>
  33
  34 #include <errno.h>                                                 /* ENOMEM */
  35 #include "playlist.h"
  36 #include "vlc_xml.h"
  37
  38 struct demux_sys_t
  39 {
  40     playlist_t *p_playlist;
  41     playlist_item_t *p_current;
  42     playlist_item_t *p_item_in_category;
  43
  44     xml_t *p_xml;
  45     xml_reader_t *p_xml_reader;
  46
  47     vlc_bool_t b_adult;
  48 };
  49
  50 /* duplicate from modules/services_discovery/shout.c */
  51 #define SHOUTCAST_BASE_URL "http/shout-winamp://www.shoutcast.com/sbin/newxml.phtml"
  52 #define SHOUTCAST_TUNEIN_BASE_URL "http://www.shoutcast.com"
  53 #define SHOUTCAST_TV_TUNEIN_URL "http://www.shoutcast.com/sbin/tunein-tvstation.pls?id="
  54
  55 /*****************************************************************************
  56  * Local prototypes
  57  *****************************************************************************/
  58 static int Demux( demux_t *p_demux);
  59 static int Control( demux_t *p_demux, int i_query, va_list args );
  60
  61 static int DemuxGenre( demux_t *p_demux );
  62 static int DemuxStation( demux_t *p_demux );
  63
  64 /*****************************************************************************
  65  * Import_Shoutcast: main import function
  66  *****************************************************************************/
  67 int E_(Import_Shoutcast)( vlc_object_t *p_this )
  68 {
  69     demux_t *p_demux = (demux_t *)p_this;
  70
  71     if( !isDemux( p_demux, "shout-winamp" ) )
  72         return VLC_EGENERIC;
  73
  74     STANDARD_DEMUX_INIT_MSG( "using shoutcast playlist reader" );
  75     p_demux->p_sys->p_playlist = NULL;
  76     p_demux->p_sys->p_xml = NULL;
  77     p_demux->p_sys->p_xml_reader = NULL;
  78
  79     /* Do we want to list adult content ? */
  80     var_Create( p_demux, "shoutcast-show-adult",
  81                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
  82     p_demux->p_sys->b_adult = var_GetBool( p_demux, "shoutcast-show-adult" );
  83
  84     return VLC_SUCCESS;
  85 }
  86
  87 /*****************************************************************************
  88  * Deactivate: frees unused data
  89  *****************************************************************************/
  90 void E_(Close_Shoutcast)( vlc_object_t *p_this )
  91 {
  92     demux_t *p_demux = (demux_t *)p_this;
  93     demux_sys_t *p_sys = p_demux->p_sys;
  94
  95     if( p_sys->p_playlist )
  96         vlc_object_release( p_sys->p_playlist );
  97     if( p_sys->p_xml_reader )
  98         xml_ReaderDelete( p_sys->p_xml, p_sys->p_xml_reader );
  99     if( p_sys->p_xml )
 100         xml_Delete( p_sys->p_xml );
 101     free( p_sys );
 102 }
 103
 104 static int Demux( demux_t *p_demux )
 105 {
 106     demux_sys_t *p_sys = p_demux->p_sys;
 107     xml_t *p_xml;
 108     xml_reader_t *p_xml_reader;
 109     char *psz_eltname = NULL;
 110     INIT_PLAYLIST_STUFF;
 111     p_sys->p_playlist = p_playlist;
 112     p_sys->p_current = p_current;
 113     p_sys->p_item_in_category = p_item_in_category;
 114
 115     p_xml = p_sys->p_xml = xml_Create( p_demux );
 116     if( !p_xml ) return -1;
 117
 118     p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
 119     if( !p_xml_reader ) return -1;
 120     p_sys->p_xml_reader = p_xml_reader;
 121
 122     /* check root node */
 123     if( xml_ReaderRead( p_xml_reader ) != 1 )
 124     {
 125         msg_Err( p_demux, "invalid file (no root node)" );
 126         return -1;
 127     }
 128
 129     if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
 130         ( psz_eltname = xml_ReaderName( p_xml_reader ) ) == NULL ||
 131         ( strcmp( psz_eltname, "genrelist" )
 132           && strcmp( psz_eltname, "stationlist" ) ) )
 133     {
 134         msg_Err( p_demux, "invalid root node %i, %s",
 135                  xml_ReaderNodeType( p_xml_reader ), psz_eltname );
 136         if( psz_eltname ) free( psz_eltname );
 137         return -1;
 138     }
 139
 140     if( !strcmp( psz_eltname, "genrelist" ) )
 141     {
 142         /* we're reading a genre list */
 143         free( psz_eltname );
 144         if( DemuxGenre( p_demux ) ) return -1;
 145     }
 146     else
 147     {
 148         /* we're reading a station list */
 149         free( psz_eltname );
 150         if( DemuxStation( p_demux ) ) return -1;
 151     }
 152
 153     HANDLE_PLAY_AND_RELEASE;
 154     p_sys->p_playlist = NULL;
 155     return -1; /* Needed for correct operation of go back */
 156 }
 157
 158 #define GET_VALUE( a ) \
 159                         if( !strcmp( psz_attrname, #a ) ) \
 160                         { \
 161                             psz_ ## a = strdup( psz_attrvalue ); \
 162                         }
 163 /* <genrelist>
 164  *   <genre name="the name"></genre>
 165  *   ...
 166  * </genrelist>
 167  **/
 168 static int DemuxGenre( demux_t *p_demux )
 169 {
 170     demux_sys_t *p_sys = p_demux->p_sys;
 171     char *psz_name = NULL; /* genre name */
 172     char *psz_eltname = NULL; /* tag name */
 173     input_item_t *p_input;
 174
 175     while( xml_ReaderRead( p_sys->p_xml_reader ) == 1 )
 176     {
 177         int i_type;
 178
 179         // Get the node type
 180         i_type = xml_ReaderNodeType( p_sys->p_xml_reader );
 181         switch( i_type )
 182         {
 183             // Error
 184             case -1:
 185                 return -1;
 186                 break;
 187
 188             case XML_READER_STARTELEM:
 189                 // Read the element name
 190                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 191                 if( !psz_eltname ) return -1;
 192
 193                 if( !strcmp( psz_eltname, "genre" ) )
 194                 {
 195                     // Read the attributes
 196                     while( xml_ReaderNextAttr( p_sys->p_xml_reader ) == VLC_SUCCESS )
 197                     {
 198                         char *psz_attrname = xml_ReaderName( p_sys->p_xml_reader );
 199                         char *psz_attrvalue =
 200                             xml_ReaderValue( p_sys->p_xml_reader );
 201                         if( !psz_attrname || !psz_attrvalue )
 202                         {
 203                             FREENULL(psz_attrname);
 204                             FREENULL(psz_attrvalue);
 205                             free(psz_eltname);
 206                             /*FIXME: isn't return a bit too much. what about break*/
 207                             return -1;
 208                         }
 209
 210                         GET_VALUE( name )
 211                         else
 212                         {
 213                             msg_Warn( p_demux,
 214                                       "unexpected attribure %s in element %s",
 215                                       psz_attrname,psz_eltname );
 216                         }
 217                         free( psz_attrname );
 218                         free( psz_attrvalue );
 219                     }
 220                 }
 221                 free( psz_eltname ); psz_eltname = NULL;
 222                 break;
 223
 224             case XML_READER_TEXT:
 225                 break;
 226
 227             // End element
 228             case XML_READER_ENDELEM:
 229                 // Read the element name
 230                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 231                 if( !psz_eltname ) return -1;
 232                 if( !strcmp( psz_eltname, "genre" ) )
 233                 {
 234                     char *psz_mrl = malloc( strlen( SHOUTCAST_BASE_URL )
 235                             + strlen( "?genre=" ) + strlen( psz_name ) + 1 );
 236                     sprintf( psz_mrl, SHOUTCAST_BASE_URL "?genre=%s",
 237                              psz_name );
 238                     p_input = input_ItemNewExt( p_sys->p_playlist, psz_mrl,
 239                                                 psz_name, 0, NULL, -1 );
 240                     input_ItemCopyOptions( p_sys->p_current->p_input,
 241                                                 p_input );
 242                     free( psz_mrl );
 243                     playlist_BothAddInput( p_sys->p_playlist, p_input,
 244                                            p_sys->p_item_in_category,
 245                                            PLAYLIST_APPEND, PLAYLIST_END );
 246                     FREENULL( psz_name );
 247                 }
 248                 FREENULL( psz_eltname );
 249                 break;
 250         }
 251     }
 252     return 0;
 253 }
 254
 255 /* radio stations:
 256  * <stationlist>
 257  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 258  *   <station name="the name"
 259  *            mt="mime type"
 260  *            id="the id"
 261  *            br="bit rate"
 262  *            genre="A big genre string"
 263  *            ct="current track name/author/..."
 264  *            lc="listener count"></station>
 265  * </stationlist>
 266  *
 267  * TV stations:
 268  * <stationlist>
 269  *   <tunein base="/sbin/tunein-station.pls"></tunein>
 270  *   <station name="the name"
 271  *            id="the id"
 272  *            br="bit rate"
 273  *            rt="rating"
 274  *            load="server load ?"
 275  *            ct="current track name/author/..."
 276  *            genre="A big genre string"
 277  *            lc="listener count"></station>
 278  * </stationlist>
 279  **/
 280 static int DemuxStation( demux_t *p_demux )
 281 {
 282     demux_sys_t *p_sys = p_demux->p_sys;
 283     input_item_t *p_input;
 284
 285     char *psz_base = NULL; /* */
 286
 287     char *psz_name = NULL; /* genre name */
 288     char *psz_mt = NULL; /* mime type */
 289     char *psz_id = NULL; /* id */
 290     char *psz_br = NULL; /* bit rate */
 291     char *psz_genre = NULL; /* genre */
 292     char *psz_ct = NULL; /* current track */
 293     char *psz_lc = NULL; /* listener count */
 294
 295     /* If these are set then it's *not* a radio but a TV */
 296     char *psz_rt = NULL; /* rating for shoutcast TV */
 297     char *psz_load = NULL; /* load for shoutcast TV */
 298
 299     char *psz_eltname = NULL; /* tag name */
 300
 301     while( xml_ReaderRead( p_sys->p_xml_reader ) == 1 )
 302     {
 303         int i_type;
 304
 305         // Get the node type
 306         i_type = xml_ReaderNodeType( p_sys->p_xml_reader );
 307         switch( i_type )
 308         {
 309             // Error
 310             case -1:
 311                 return -1;
 312                 break;
 313
 314             case XML_READER_STARTELEM:
 315                 // Read the element name
 316                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 317                 if( !psz_eltname ) return -1;
 318
 319                 // Read the attributes
 320                 if( !strcmp( psz_eltname, "tunein" ) )
 321                 {
 322                     while( xml_ReaderNextAttr( p_sys->p_xml_reader ) == VLC_SUCCESS )
 323                     {
 324                         char *psz_attrname = xml_ReaderName( p_sys->p_xml_reader );
 325                         char *psz_attrvalue =
 326                             xml_ReaderValue( p_sys->p_xml_reader );
 327                         if( !psz_attrname || !psz_attrvalue )
 328                         {
 329                             free(psz_eltname);
 330                             FREENULL(psz_attrname);
 331                             FREENULL(psz_attrvalue);
 332                             return -1;
 333                         }
 334
 335                         GET_VALUE( base )
 336                         else
 337                         {
 338                             msg_Warn( p_demux,
 339                                       "unexpected attribure %s in element %s",
 340                                       psz_attrname, psz_eltname );
 341                         }
 342                         free( psz_attrname );
 343                         free( psz_attrvalue );
 344                     }
 345                 }
 346                 else if( !strcmp( psz_eltname, "station" ) )
 347                 {
 348                     while( xml_ReaderNextAttr( p_sys->p_xml_reader ) == VLC_SUCCESS )
 349                     {
 350                         char *psz_attrname = xml_ReaderName( p_sys->p_xml_reader );
 351                         char *psz_attrvalue =
 352                             xml_ReaderValue( p_sys->p_xml_reader );
 353                         if( !psz_attrname || !psz_attrvalue )
 354                         {
 355                             free(psz_eltname);
 356                             FREENULL(psz_attrname);
 357                             FREENULL(psz_attrvalue);
 358                             return -1;
 359                         }
 360
 361                         GET_VALUE( name )
 362                         else GET_VALUE( mt )
 363                         else GET_VALUE( id )
 364                         else GET_VALUE( br )
 365                         else GET_VALUE( genre )
 366                         else GET_VALUE( ct )
 367                         else GET_VALUE( lc )
 368                         else GET_VALUE( rt )
 369                         else GET_VALUE( load )
 370                         else
 371                         {
 372                             msg_Warn( p_demux,
 373                                       "unexpected attribute %s in element %s",
 374                                       psz_attrname, psz_eltname );
 375                         }
 376                         free( psz_attrname );
 377                         free( psz_attrvalue );
 378                     }
 379                 }
 380                 free(psz_eltname);
 381                 break;
 382
 383             case XML_READER_TEXT:
 384                 break;
 385
 386             // End element
 387             case XML_READER_ENDELEM:
 388                 // Read the element name
 389                 psz_eltname = xml_ReaderName( p_sys->p_xml_reader );
 390                 if( !psz_eltname ) return -1;
 391                 if( !strcmp( psz_eltname, "station" ) &&
 392                     ( psz_base || ( psz_rt && psz_load &&
 393                     ( p_sys->b_adult || strcmp( psz_rt, "NC17" ) ) ) ) )
 394                 {
 395                     char *psz_mrl = NULL;
 396                     if( psz_rt || psz_load )
 397                     {
 398                         /* tv */
 399                         psz_mrl = malloc( strlen( SHOUTCAST_TV_TUNEIN_URL )
 400                                           + strlen( psz_id ) + 1 );
 401                         sprintf( psz_mrl, SHOUTCAST_TV_TUNEIN_URL "%s",
 402                                  psz_id );
 403                     }
 404                     else
 405                     {
 406                         /* radio */
 407                         psz_mrl = malloc( strlen( SHOUTCAST_TUNEIN_BASE_URL )
 408                             + strlen( psz_base ) + strlen( "?id=" )
 409                             + strlen( psz_id ) + 1 );
 410                         sprintf( psz_mrl, SHOUTCAST_TUNEIN_BASE_URL "%s?id=%s",
 411                              psz_base, psz_id );
 412                     }
 413                     p_input = input_ItemNewExt( p_sys->p_playlist, psz_mrl,
 414                                                 psz_name , 0, NULL, -1 );
 415                     free( psz_mrl );
 416
 417                     input_ItemCopyOptions( p_sys->p_current->p_input,
 418                                                 p_input );
 419
 420 #define SADD_INFO( type, field ) if( field ) { input_ItemAddInfo( \
 421                     p_input, _("Shoutcast"), _(type), "%s", field ) ; }
 422                     SADD_INFO( "Mime type", psz_mt );
 423                     SADD_INFO( "Bitrate", psz_br );
 424                     SADD_INFO( "Listeners", psz_lc );
 425                     SADD_INFO( "Load", psz_load );
 426                     p_input->p_meta = vlc_meta_New();
 427                     if( psz_genre )
 428                         vlc_meta_SetGenre( p_input->p_meta, psz_genre );
 429                     if( psz_ct )
 430                         vlc_meta_SetNowPlaying( p_input->p_meta, psz_ct );
 431                     if( psz_rt )
 432                         vlc_meta_SetRating( p_input->p_meta, psz_rt );
 433
 434                     playlist_BothAddInput( p_sys->p_playlist, p_input,
 435                                            p_sys->p_item_in_category,
 436                                            PLAYLIST_APPEND, PLAYLIST_END );
 437
 438                     FREENULL( psz_name );
 439                     FREENULL( psz_mt )
 440                     FREENULL( psz_id )
 441                     FREENULL( psz_br )
 442                     FREENULL( psz_genre )
 443                     FREENULL( psz_ct )
 444                     FREENULL( psz_lc )
 445                     FREENULL( psz_rt )
 446                 }
 447                 free( psz_eltname );
 448                 break;
 449         }
 450     }
 451     return 0;
 452 }
 453
 454 static int Control( demux_t *p_demux, int i_query, va_list args )
 455 {
 456     return VLC_EGENERIC;
 457 }