git.sesse.net Git - vlc/blob - modules/misc/audioscrobbler.c

   1 /*****************************************************************************
   2  * audioscrobbler.c : audioscrobbler submission plugin
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Rafaël Carré <funman at videolan org>
   8  *          Kenneth Ostby <kenneo -at- idi -dot- ntnu -dot- no>
   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 /* audioscrobbler protocol version: 1.1
  26  * http://audioscrobbler.net/wiki/Protocol1.1
  27  * */
  28
  29 /*****************************************************************************
  30  * Preamble
  31  *****************************************************************************/
  32
  33 #define _GNU_SOURCE
  34 #include <string.h>
  35
  36 #if defined( WIN32 )
  37 #include <time.h>
  38 #endif
  39
  40 #include <vlc/vlc.h>
  41 #include <vlc_interface.h>
  42 #include <vlc_meta.h>
  43 #include <vlc_md5.h>
  44 #include <vlc_block.h>
  45 #include <vlc_stream.h>
  46 #include <vlc_url.h>
  47 #include <vlc_network.h>
  48 #include <vlc_interface.h>
  49 #include <vlc_playlist.h>
  50
  51 /*****************************************************************************
  52  * Local prototypes
  53  *****************************************************************************/
  54
  55 /* Keeps track of metadata to be submitted */
  56 typedef struct audioscrobbler_song_t
  57 {
  58     char        *psz_a;                /* track artist     */
  59     char        *psz_t;                /* track title      */
  60     char        *psz_b;                /* track album      */
  61     int         i_l;                   /* track length     */
  62     char        *psz_m;                /* musicbrainz id   */
  63     char        *psz_i;                /* date             */
  64     time_t      time_playing;          /* date (epoch)     */
  65 } audioscrobbler_song_t;
  66
  67
  68 /* Queue to be submitted to server, 10 songs max */
  69 typedef struct audioscrobbler_queue_t
  70 {
  71     audioscrobbler_song_t   **p_queue;      /* contains up to 10 songs        */
  72     int                     i_songs_nb;     /* number of songs                */
  73     void                    *p_next_queue;  /* if queue full, pointer to next */
  74 } audioscrobbler_queue_t;
  75
  76 struct intf_sys_t
  77 {
  78     audioscrobbler_queue_t  *p_first_queue;     /* 1st queue              */
  79     vlc_mutex_t             lock;               /* p_sys mutex            */
  80
  81     /* data about audioscrobbler session */
  82     time_t                  time_next_exchange; /* when can we send data? */
  83     char                    *psz_submit_host;   /* where to submit data ? */
  84     int                     i_submit_port;      /* at which port ?        */
  85     char                    *psz_submit_file;   /* in which file ?        */
  86     char                    *psz_username;      /* last.fm username       */
  87     vlc_bool_t              b_handshaked;       /* did we handshake ?     */
  88     char                    *psz_response_md5;  /* md5 response to use    */
  89
  90     /* data about song currently playing */
  91     audioscrobbler_song_t   *p_current_song;    /* song being played      */
  92     time_t                  time_pause;         /* time when vlc paused   */
  93     time_t                  time_total_pauses;  /* sum of time in pause   */
  94     vlc_bool_t              b_queued;           /* has it been queud ?    */
  95     vlc_bool_t              b_metadata_read;    /* did we read metadata ? */
  96     vlc_bool_t              b_paused;           /* is vlc paused ?        */
  97     vlc_bool_t              b_waiting_meta;     /* we need fetched data?  */
  98 };
  99
 100 intf_sys_t *p_sys_global;     /* to retrieve p_sys in Run() thread */
 101
 102 static int  Open        ( vlc_object_t * );
 103 static void Close       ( vlc_object_t * );
 104 static void Run         ( intf_thread_t * );
 105 static int ItemChange   ( vlc_object_t *, const char *, vlc_value_t,
 106                                 vlc_value_t, void * );
 107 static int PlayingChange( vlc_object_t *, const char *, vlc_value_t,
 108                                 vlc_value_t, void * );
 109 static int AddToQueue   ( intf_thread_t *p_this );
 110 static int Handshake    ( intf_thread_t *p_sd );
 111 static int ReadMetaData ( intf_thread_t *p_this );
 112 void DeleteQueue        ( audioscrobbler_queue_t *p_queue );
 113
 114 /*****************************************************************************
 115  * Module descriptor
 116  ****************************************************************************/
 117
 118 #define USERNAME_TEXT       N_("Username")
 119 #define USERNAME_LONGTEXT   N_("The username of your last.fm account")
 120 #define PASSWORD_TEXT       N_("Password")
 121 #define PASSWORD_LONGTEXT   N_("The password of your last.fm account")
 122
 123 /* if something goes wrong, we wait at least one minute before trying again */
 124 #define DEFAULT_INTERVAL 60
 125
 126 /* last.fm client identifier */
 127 #define CLIENT_NAME     PACKAGE
 128 #define CLIENT_VERSION  VERSION
 129
 130 /* HTTP POST request : to submit data */
 131 #define    POST_REQUEST "POST /%s HTTP/1.1\n"                               \
 132                         "Accept-Encoding: identity\n"                       \
 133                         "Content-length: %d\n"                              \
 134                         "Connection: close\n"                               \
 135                         "Content-type: application/x-www-form-urlencoded\n" \
 136                         "Host: %s\n"                                        \
 137                         "User-agent: VLC Media Player/%s\r\n"               \
 138                         "\r\n"                                              \
 139                         "%s\r\n"                                            \
 140                         "\r\n"
 141
 142 /* data to submit */
 143 #define POST_DATA       "&a%%5B%d%%5D=%s&t%%5B%d%%5D=%s&b%%5B%d%%5D=%s" \
 144                         "&m%%5B%d%%5D=%s&l%%5B%d%%5D=%d&i%%5B%d%%5D=%s"
 145 #define HTTPPOST_MAXLEN 2048
 146
 147 vlc_module_begin();
 148     set_category( CAT_INTERFACE );
 149     set_subcategory( SUBCAT_INTERFACE_CONTROL );
 150     set_shortname( N_( "Audioscrobbler" ) );
 151     set_description( N_("Audioscrobbler submission Plugin") );
 152     add_string( "lastfm-username", "", NULL,
 153                 USERNAME_TEXT, USERNAME_LONGTEXT, VLC_FALSE );
 154     add_string( "lastfm-password", "", NULL,
 155                 PASSWORD_TEXT, PASSWORD_LONGTEXT, VLC_FALSE );
 156     set_capability( "interface", 0 );
 157     set_callbacks( Open, Close );
 158 vlc_module_end();
 159
 160 /*****************************************************************************
 161  * Open: initialize and create stuff
 162  *****************************************************************************/
 163
 164 static int Open( vlc_object_t *p_this )
 165 {
 166     playlist_t      *p_playlist;
 167     intf_thread_t   *p_intf     = ( intf_thread_t* ) p_this;
 168     intf_sys_t      *p_sys      = malloc( sizeof( intf_sys_t ) );
 169
 170 #define MEM_ERROR \
 171     free( p_sys->p_current_song ); \
 172     free( p_sys->p_first_queue ); \
 173     free( p_sys->psz_response_md5 ); \
 174     free( p_sys ); \
 175     return VLC_ENOMEM;
 176
 177
 178     if( !p_sys )
 179     {
 180         MEM_ERROR
 181     }
 182
 183     p_intf->p_sys = p_sys;
 184
 185     vlc_mutex_init( p_this, &p_sys->lock );
 186
 187     p_sys_global = p_sys;
 188     p_sys->psz_submit_host = NULL;
 189     p_sys->psz_submit_file = NULL;
 190     p_sys->b_handshaked = VLC_FALSE;
 191     p_sys->time_next_exchange = time( NULL );
 192     p_sys->psz_username = NULL;
 193     p_sys->b_paused = VLC_FALSE;
 194
 195 #define MALLOC_CHECK( a ) \
 196     if( !a ) { \
 197         vlc_mutex_destroy( &p_sys->lock ); \
 198         MEM_ERROR \
 199     }
 200
 201     /* md5 response is 32 chars, + final \0 */
 202     p_sys->psz_response_md5 = malloc( 33 );
 203     MALLOC_CHECK( p_sys->psz_response_md5 )
 204
 205     p_sys->p_first_queue = malloc( sizeof( audioscrobbler_queue_t ) );
 206     MALLOC_CHECK( p_sys->p_first_queue )
 207
 208     p_sys->p_current_song = malloc( sizeof( audioscrobbler_song_t ) );
 209     MALLOC_CHECK( p_sys->p_current_song )
 210     time( &p_sys->p_current_song->time_playing );
 211
 212     /* queues can't contain more than 10 songs */
 213     p_sys->p_first_queue->p_queue =
 214         malloc( 10 * sizeof( audioscrobbler_song_t ) );
 215     MALLOC_CHECK( p_sys->p_current_song )
 216
 217     p_sys->p_first_queue->i_songs_nb = 0;
 218     p_sys->p_first_queue->p_next_queue = NULL;
 219
 220     p_playlist = pl_Yield( p_intf );
 221     PL_LOCK;
 222     var_AddCallback( p_playlist, "playlist-current", ItemChange, p_intf );
 223     PL_UNLOCK;
 224     pl_Release( p_playlist );
 225
 226     p_intf->pf_run = Run;
 227
 228     return VLC_SUCCESS;
 229 #undef MEM_ERROR
 230 #undef MALLOC_CHECK
 231 }
 232
 233 /*****************************************************************************
 234  * Close: destroy interface stuff
 235  *****************************************************************************/
 236 static void Close( vlc_object_t *p_this )
 237 {
 238     audioscrobbler_queue_t      *p_current_queue, *p_next_queue;
 239     playlist_t                  *p_playlist;
 240     input_thread_t              *p_input;
 241     intf_thread_t               *p_intf = ( intf_thread_t* ) p_this;
 242     intf_sys_t                  *p_sys  = p_intf->p_sys;
 243
 244     p_playlist = pl_Yield( p_intf );
 245     PL_LOCK;
 246     var_DelCallback( p_playlist, "playlist-current", ItemChange, p_intf );
 247
 248     p_input = p_playlist->p_input;
 249     if ( p_input )
 250     {
 251         vlc_object_yield( p_input );
 252         var_DelCallback( p_input, "state", PlayingChange, p_intf );
 253         vlc_object_release( p_input );
 254     }
 255
 256     PL_UNLOCK;
 257     pl_Release( p_playlist );
 258
 259     vlc_mutex_lock ( &p_sys->lock );
 260     p_current_queue = p_sys->p_first_queue;
 261     vlc_mutex_unlock ( &p_sys->lock );
 262
 263     while( ( p_current_queue->i_songs_nb == 10 ) &&
 264         ( p_current_queue->p_next_queue != NULL ) )
 265     {
 266         p_next_queue = p_current_queue->p_next_queue;
 267         DeleteQueue( p_current_queue );
 268         free( p_current_queue );
 269         p_current_queue = p_next_queue;
 270     }
 271
 272     DeleteQueue( p_current_queue );
 273     free( p_current_queue );
 274
 275     vlc_mutex_lock ( &p_sys->lock );
 276     free( p_sys->psz_username );
 277     free( p_sys->p_current_song );
 278     free( p_sys->psz_submit_host );
 279     free( p_sys->psz_submit_file );
 280     free( p_sys->psz_response_md5 );
 281     vlc_mutex_unlock ( &p_sys->lock );
 282     vlc_mutex_destroy( &p_sys->lock );
 283     free( p_sys );
 284 }
 285
 286 /*****************************************************************************
 287  * Run : call Handshake() then submit songs
 288  *****************************************************************************/
 289 static void Run( intf_thread_t *p_this )
 290 {
 291     char                    *psz_submit         = NULL;
 292     char                    *psz_submit_song    = NULL;
 293     int                     i_net_ret;
 294     int                     i_song;
 295     playlist_t              *p_playlist;
 296     uint8_t                 *p_buffer           = NULL;
 297     char                    *p_buffer_pos       = NULL;
 298     audioscrobbler_queue_t  *p_first_queue;
 299     int                     i_post_socket;
 300     time_t                  played_time;
 301
 302     p_this->p_sys = p_sys_global;
 303     intf_sys_t *p_sys = p_this->p_sys;
 304
 305     #define MEM_ERROR \
 306         free( psz_submit ); \
 307         free( psz_submit_song ); \
 308         free( p_buffer ); \
 309         msg_Err( p_this, "Out of memory" ); \
 310         return;
 311
 312     psz_submit = malloc( HTTPPOST_MAXLEN );
 313     psz_submit_song = malloc( HTTPPOST_MAXLEN );
 314     p_buffer = ( uint8_t* ) malloc( 1024 );
 315
 316     if( !psz_submit || !psz_submit_song || !p_buffer )
 317     {
 318         MEM_ERROR
 319     }
 320
 321     /* main loop */
 322     while( !p_this->b_die )
 323     {
 324         /* verify if there is data to submit
 325          * and if waiting interval is elapsed */
 326         if ( ( p_sys->p_first_queue->i_songs_nb > 0 ) &&
 327             ( time( NULL ) >= p_sys->time_next_exchange ) )
 328         {
 329             /* handshake if needed */
 330             if( p_sys->b_handshaked == VLC_FALSE )
 331             {
 332                 msg_Dbg( p_this, "Handshaking with last.fm ..." );
 333
 334                 switch( Handshake( p_this ) )
 335                 {
 336                     case VLC_ENOMEM:
 337                         MEM_ERROR
 338                         break;
 339
 340                     case VLC_ENOVAR:
 341                         /* username not set */
 342                         vlc_mutex_unlock ( &p_sys->lock );
 343                         intf_UserFatal( p_this, VLC_FALSE,
 344                             _("Last.fm username not set"),
 345                             _("Please set an username or disable "
 346                             "audioscrobbler plugin, and then restart VLC.\n"
 347                             "Visit https://www.last.fm/join/ to get an account")
 348                         );
 349                         free( psz_submit );
 350                         free( psz_submit_song );
 351                         free( p_buffer );
 352                         return;
 353                         break;
 354
 355                     case VLC_SUCCESS:
 356                         msg_Dbg( p_this, "Handshake successfull :)" );
 357                         vlc_mutex_lock ( &p_sys->lock );
 358                         p_sys->b_handshaked = VLC_TRUE;
 359                         vlc_mutex_unlock ( &p_sys->lock );
 360                         break;
 361
 362                     case VLC_EGENERIC:
 363                     default:
 364                         /* protocol error : we'll try later */
 365                         vlc_mutex_lock ( &p_sys->lock );
 366                         time( &p_sys->time_next_exchange );
 367                         p_sys->time_next_exchange += DEFAULT_INTERVAL;
 368                         vlc_mutex_unlock ( &p_sys->lock );
 369                         break;
 370                 }
 371             }
 372
 373             msg_Dbg( p_this, "Going to submit some data..." );
 374             vlc_mutex_lock ( &p_sys->lock );
 375
 376             snprintf( psz_submit, HTTPPOST_MAXLEN, "u=%s&s=%s",
 377                 p_sys->psz_username, p_sys->psz_response_md5 );
 378
 379             /* forge the HTTP POST request */
 380             for (i_song = 0 ; i_song < p_sys->p_first_queue->i_songs_nb ;
 381                 i_song++ )
 382             {
 383                 snprintf( psz_submit_song, HTTPPOST_MAXLEN -1, POST_DATA,
 384                     i_song, p_sys->p_first_queue->p_queue[i_song]->psz_a,
 385                     i_song, p_sys->p_first_queue->p_queue[i_song]->psz_t,
 386                     i_song, p_sys->p_first_queue->p_queue[i_song]->psz_b,
 387                     i_song, p_sys->p_first_queue->p_queue[i_song]->psz_m,
 388                     i_song, p_sys->p_first_queue->p_queue[i_song]->i_l,
 389                     i_song, p_sys->p_first_queue->p_queue[i_song]->psz_i
 390                 );
 391                 strncat( psz_submit, psz_submit_song, HTTPPOST_MAXLEN - 1 );
 392             }
 393
 394             i_post_socket = net_ConnectTCP( p_this,
 395                 p_sys->psz_submit_host, p_sys->i_submit_port);
 396
 397             /* we transmit the data */
 398             i_net_ret = net_Printf(
 399                 VLC_OBJECT(p_this), i_post_socket, NULL,
 400                 POST_REQUEST, p_sys->psz_submit_file,
 401                 strlen( psz_submit ), p_sys->psz_submit_file,
 402                 VERSION, psz_submit
 403             );
 404
 405             if ( i_net_ret == -1 )
 406             {
 407                 /* If connection fails, we assume we must handshake again */
 408                 time( &p_sys->time_next_exchange );
 409                 p_sys->time_next_exchange += DEFAULT_INTERVAL;
 410                 p_sys->b_handshaked = VLC_FALSE;
 411                 vlc_mutex_unlock( &p_sys->lock );
 412                 continue;
 413             }
 414
 415             memset( p_buffer, '\0', 1024 );
 416
 417             i_net_ret = net_Read( p_this, i_post_socket, NULL,
 418                         p_buffer, 1024, VLC_FALSE );
 419             if ( i_net_ret <= 0 )
 420             {
 421                 /* if we get no answer, something went wrong : try again */
 422                 vlc_mutex_unlock( &p_sys->lock );
 423                 continue;
 424             }
 425
 426             net_Close( i_post_socket );
 427
 428             /* record interval */
 429             p_buffer_pos = strstr( ( char * ) p_buffer, "INTERVAL" );
 430             if ( p_buffer_pos )
 431             {
 432                 time( &p_sys->time_next_exchange );
 433                 p_sys->time_next_exchange += atoi( p_buffer_pos +
 434                                             strlen( "INTERVAL " ) );
 435             }
 436
 437             p_buffer_pos = strstr( ( char * ) p_buffer, "FAILED" );
 438             if ( p_buffer_pos )
 439             {
 440                 /* woops, submission failed */
 441                 msg_Dbg( p_this, "%s", p_buffer_pos );
 442                 vlc_mutex_unlock ( &p_sys->lock );
 443                 continue;
 444             }
 445
 446             p_buffer_pos = strstr( ( char * ) p_buffer, "BADAUTH" );
 447             if ( p_buffer_pos )
 448             {
 449                 msg_Dbg( p_this, "Authentification failed, handshaking again" );
 450                 p_sys->b_handshaked = VLC_FALSE;
 451                 vlc_mutex_unlock ( &p_sys->lock );
 452                 continue;
 453             }
 454
 455             p_buffer_pos = strstr( ( char * ) p_buffer, "OK" );
 456             if ( p_buffer_pos )
 457             {
 458                 if ( p_sys->p_first_queue->i_songs_nb == 10 )
 459                 {
 460                     /* if there are more than one queue, delete the 1st */
 461                     p_first_queue = p_sys->p_first_queue->p_next_queue;
 462                     DeleteQueue( p_sys->p_first_queue );
 463                     free( p_sys->p_first_queue );
 464                     p_sys->p_first_queue = p_first_queue;
 465                 }
 466                 else
 467                 {
 468                     DeleteQueue( p_sys->p_first_queue );
 469                     p_sys->p_first_queue->i_songs_nb = 0;
 470                 }
 471                 msg_Dbg( p_this, "Submission successfull!" );
 472             }
 473             vlc_mutex_unlock ( &p_sys->lock );
 474         } /* data transmission finished or skipped */
 475
 476         msleep( INTF_IDLE_SLEEP );
 477
 478         p_playlist = pl_Yield( p_this );
 479         PL_LOCK;
 480         if( p_playlist->request.i_status == PLAYLIST_STOPPED )
 481         {
 482             /* if we stopped, we won't submit playing song */
 483             vlc_mutex_lock( &p_sys->lock );
 484             p_sys->b_queued = VLC_TRUE;
 485             p_sys->b_metadata_read = VLC_TRUE;
 486             vlc_mutex_unlock( &p_sys->lock );
 487         }
 488         PL_UNLOCK;
 489         pl_Release( p_playlist );
 490
 491         vlc_mutex_lock( &p_sys->lock );
 492         if( p_sys->b_metadata_read == VLC_FALSE )
 493         {
 494             /* we read the metadata of the playing song */
 495             time( &played_time );
 496             played_time -= p_sys->p_current_song->time_playing;
 497             played_time -= p_sys->time_total_pauses;
 498
 499             vlc_mutex_unlock( &p_sys->lock );
 500
 501             if( played_time > 20 )
 502             /* wait at least 20 secondes before reading the meta data
 503              * since the songs must be at least 30s */
 504             {
 505                 if ( ReadMetaData( p_this ) == VLC_ENOMEM )
 506                 {
 507                     MEM_ERROR
 508                 }
 509             }
 510         }
 511         else
 512         {
 513             /* we add the playing song into the queue */
 514             if( ( p_sys->b_queued == VLC_FALSE )
 515                 && ( p_sys->b_paused == VLC_FALSE ) )
 516             {
 517                 vlc_mutex_unlock( &p_sys->lock );
 518                 if( AddToQueue( p_this ) == VLC_ENOMEM )
 519                 {
 520                     MEM_ERROR
 521                 }
 522             }
 523             else
 524             {
 525                 vlc_mutex_unlock( &p_sys->lock );
 526             }
 527         }
 528     }
 529 #undef MEM_ERROR
 530 }
 531
 532 /*****************************************************************************
 533  * PlayingChange: Playing status change callback
 534  *****************************************************************************/
 535 static int PlayingChange( vlc_object_t *p_this, const char *psz_var,
 536                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 537 {
 538     intf_thread_t   *p_intf = ( intf_thread_t* ) p_data;
 539     intf_sys_t      *p_sys  = p_intf->p_sys;
 540
 541     (void)p_this; (void)psz_var; (void)oldval;
 542
 543     /* don't bother if song has already been queued */
 544     if( p_sys->b_queued == VLC_TRUE )
 545         return VLC_SUCCESS;
 546
 547     vlc_mutex_lock( &p_sys->lock );
 548
 549     if( newval.i_int == PAUSE_S )
 550     {
 551         time( &p_sys->time_pause );
 552         p_sys->b_paused = VLC_TRUE;
 553     }
 554
 555     else if( newval.i_int == PLAYING_S )
 556     {
 557         p_sys->time_total_pauses += time( NULL ) - p_sys->time_pause;
 558         p_sys->b_paused = VLC_FALSE;
 559     }
 560
 561     vlc_mutex_unlock( &p_sys->lock );
 562
 563     return VLC_SUCCESS;
 564 }
 565
 566 /*****************************************************************************
 567  * ItemChange: Playlist item change callback
 568  *****************************************************************************/
 569 static int ItemChange( vlc_object_t *p_this, const char *psz_var,
 570                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 571 {
 572     playlist_t          *p_playlist;
 573     input_thread_t      *p_input    = NULL;
 574     time_t              epoch;
 575     struct tm           *epoch_tm;
 576     char                psz_date[20];
 577     intf_thread_t       *p_intf     = ( intf_thread_t* ) p_data;
 578     intf_sys_t          *p_sys      = p_intf->p_sys;
 579     (void)p_this; (void)psz_var; (void)oldval; (void)newval;
 580
 581     p_playlist = pl_Yield( p_intf );
 582     PL_LOCK;
 583     p_input = p_playlist->p_input;
 584
 585     if( !p_input )
 586     {
 587         PL_UNLOCK;
 588         pl_Release( p_playlist );
 589
 590         vlc_mutex_lock( &p_sys->lock );
 591
 592         p_sys->b_queued = VLC_TRUE;
 593         p_sys->b_metadata_read = VLC_TRUE;
 594
 595         vlc_mutex_unlock( &p_sys->lock );
 596
 597         return VLC_SUCCESS;
 598     }
 599
 600     vlc_object_yield( p_input );
 601     PL_UNLOCK;
 602     pl_Release( p_playlist );
 603
 604     var_AddCallback( p_input, "state", PlayingChange, p_intf );
 605
 606     vlc_mutex_lock ( &p_sys->lock );
 607
 608     /* reset pause counter */
 609     p_sys->time_total_pauses = 0;
 610
 611     /* we'll read metadata when it's present */
 612     p_sys->b_metadata_read = VLC_FALSE;
 613     p_sys->b_waiting_meta = VLC_FALSE;
 614
 615     time( &epoch );
 616     epoch_tm = gmtime( &epoch );
 617     snprintf( psz_date, 20, "%.4d-%.2d-%.2d %.2d:%.2d:%.2d",
 618         epoch_tm->tm_year+1900, epoch_tm->tm_mon+1, epoch_tm->tm_mday,
 619         epoch_tm->tm_hour, epoch_tm->tm_min, epoch_tm->tm_sec );
 620
 621     p_sys->p_current_song->psz_i = encode_URI_component( psz_date );
 622     p_sys->p_current_song->time_playing = epoch;
 623
 624     p_sys->b_paused = ( p_input->b_dead || !input_GetItem(p_input)->psz_name )
 625                       ? VLC_TRUE : VLC_FALSE;
 626
 627     vlc_mutex_unlock( &p_sys->lock );
 628
 629     vlc_object_release( p_input );
 630     return VLC_SUCCESS;
 631 }
 632
 633 /*****************************************************************************
 634  * AddToQueue: Add the played song to the queue to be submitted
 635  *****************************************************************************/
 636 static int AddToQueue ( intf_thread_t *p_this )
 637 {
 638     int                         i_songs_nb;
 639     time_t                      played_time;
 640     audioscrobbler_queue_t      *p_queue        = NULL,
 641                                 *p_next_queue   = NULL;
 642     intf_sys_t                  *p_sys          = p_this->p_sys;
 643
 644     /* wait for the user to listen enough before submitting */
 645     time ( &played_time );
 646     vlc_mutex_lock( &p_sys->lock );
 647
 648     played_time -= p_sys->p_current_song->time_playing;
 649     played_time -= p_sys->time_total_pauses;
 650
 651     #define NO_SUBMISSION \
 652         p_sys->b_queued = VLC_TRUE; \
 653         vlc_mutex_unlock( &p_sys->lock ); \
 654         return VLC_SUCCESS;
 655
 656     if( ( played_time < 240 ) &&
 657         ( played_time < ( p_sys->p_current_song->i_l / 2 ) ) )
 658     {
 659         //msg_Dbg( p_this, "Song not listened long enough -> waiting" );
 660         vlc_mutex_unlock( &p_sys->lock );
 661         return VLC_SUCCESS;
 662     }
 663
 664     if( p_sys->p_current_song->i_l < 30 )
 665     {
 666         msg_Dbg( p_this, "Song too short (< 30s) -> not submitting" );
 667         NO_SUBMISSION
 668     }
 669
 670     if( !*p_sys->p_current_song->psz_a || !*p_sys->p_current_song->psz_t )
 671     {
 672         msg_Dbg( p_this, "Missing artist or title -> not submitting" );
 673         NO_SUBMISSION
 674     }
 675
 676     msg_Dbg( p_this, "Ok. We'll put it in the queue for submission" );
 677
 678     /* go to last queue */
 679     p_queue = p_sys->p_first_queue;
 680     while( ( p_queue->i_songs_nb == 10 ) && ( p_queue->p_next_queue != NULL ) )
 681         p_queue = p_queue->p_next_queue;
 682
 683     i_songs_nb = p_queue->i_songs_nb;
 684
 685     #define MALLOC_CHECK( a ) \
 686         if( !a ) { \
 687             vlc_mutex_unlock( &p_sys->lock ); \
 688             return VLC_ENOMEM; \
 689         }
 690
 691     if( i_songs_nb == 10 )
 692     {
 693         p_next_queue = malloc( sizeof( audioscrobbler_queue_t ) );
 694         MALLOC_CHECK( p_next_queue );
 695         p_queue->p_next_queue = p_next_queue;
 696         p_queue = p_next_queue;
 697         i_songs_nb = 0;
 698         p_queue->i_songs_nb = i_songs_nb;
 699     }
 700
 701     p_queue->p_queue[i_songs_nb] = malloc( sizeof( audioscrobbler_song_t ) );
 702     MALLOC_CHECK( p_queue->p_queue[i_songs_nb] );
 703
 704     #define QUEUE_COPY( a ) \
 705         p_queue->p_queue[i_songs_nb]->a = p_sys->p_current_song->a
 706
 707     QUEUE_COPY(i_l);
 708     QUEUE_COPY(psz_a);
 709     QUEUE_COPY(psz_t);
 710     QUEUE_COPY(psz_b);
 711     QUEUE_COPY(psz_m);
 712     QUEUE_COPY(psz_i);
 713
 714     p_queue->i_songs_nb++;
 715     p_sys->b_queued = VLC_TRUE;
 716
 717     vlc_mutex_unlock( &p_sys->lock );
 718
 719     return VLC_SUCCESS;
 720 #undef QUEUE_COPY
 721 #undef MALLOC_CHECK
 722 #undef NO_SUBMISSION
 723 }
 724
 725 /*****************************************************************************
 726  * Handshake : Init audioscrobbler connection
 727  *****************************************************************************/
 728 static int Handshake( intf_thread_t *p_this )
 729 {
 730     char                *psz_password           = NULL;
 731     struct md5_s        *p_struct_md5           = NULL;
 732     char                *psz_password_md5       = NULL;
 733     char                *ps_challenge_md5       = NULL;
 734     stream_t            *p_stream;
 735     char                *psz_handshake_url      = NULL;
 736     uint8_t             *p_buffer               = NULL;
 737     char                *p_buffer_pos           = NULL;
 738     char                *psz_url_parser         = NULL;
 739     char                *psz_buffer_substring;
 740     int                 i_url_pos, i;
 741
 742     intf_thread_t       *p_intf                 = ( intf_thread_t* ) p_this;
 743     intf_sys_t          *p_sys                  = p_this->p_sys;
 744
 745     vlc_mutex_lock ( &p_sys->lock );
 746
 747     #define MEM_ERROR \
 748         free( p_buffer ); \
 749         free( p_struct_md5 ); \
 750         free( ps_challenge_md5 ); \
 751         vlc_mutex_unlock( &p_sys->lock ); \
 752         return VLC_ENOMEM;
 753
 754     #define PROTOCOL_ERROR \
 755         free( p_buffer ); \
 756         vlc_mutex_unlock( &p_sys->lock ); \
 757         return VLC_EGENERIC;
 758
 759     #define MALLOC_CHECK( a ) \
 760         if( !a ) \
 761         { \
 762             MEM_ERROR \
 763         }
 764
 765     p_sys->psz_username = config_GetPsz(p_this, "lastfm-username");
 766     MALLOC_CHECK( p_sys->psz_username )
 767
 768     /* username has not been setup, ignoring */
 769     if ( !*p_sys->psz_username )
 770         return VLC_ENOVAR;
 771
 772     psz_handshake_url = malloc( 1024 );
 773     MALLOC_CHECK( p_sys->psz_username )
 774
 775     snprintf( psz_handshake_url, 1024,
 776         "http://post.audioscrobbler.com/?hs=true&p=1.1&c=%s&v=%s&u=%s",
 777         CLIENT_NAME, CLIENT_VERSION, p_sys->psz_username );
 778
 779     /* send the http handshake request */
 780     p_stream = stream_UrlNew( p_intf, psz_handshake_url);
 781
 782     free( psz_handshake_url );
 783
 784     if( !p_stream )
 785     {
 786         vlc_mutex_unlock ( &p_sys->lock );
 787         return VLC_EGENERIC;
 788     }
 789
 790     p_buffer = ( uint8_t* ) calloc( 1, 1024 );
 791     if ( !p_buffer )
 792     {
 793         stream_Delete( p_stream );
 794         MEM_ERROR
 795     }
 796
 797     /* read answer */
 798     if ( stream_Read( p_stream, p_buffer, 1024 ) == 0 )
 799     {
 800         stream_Delete( p_stream );
 801         PROTOCOL_ERROR
 802     }
 803
 804     stream_Delete( p_stream );
 805
 806     /* record interval before next submission */
 807     p_buffer_pos = strstr( ( char* ) p_buffer, "INTERVAL" );
 808     if ( p_buffer_pos )
 809     {
 810         time( &p_sys->time_next_exchange );
 811         p_sys->time_next_exchange +=
 812                 atoi( p_buffer_pos + strlen( "INTERVAL " ) );
 813     }
 814
 815     p_buffer_pos = strstr( ( char* ) p_buffer, "FAILED" );
 816     if ( p_buffer_pos )
 817     {
 818         /* handshake request failed, sorry */
 819         msg_Dbg( p_this, "%s", p_buffer_pos );
 820         PROTOCOL_ERROR
 821     }
 822
 823     p_buffer_pos = strstr( ( char* ) p_buffer, "BADUSER" );
 824     if ( p_buffer_pos )
 825     {
 826         /* username does not exist on the server */
 827         intf_UserFatal( p_this, VLC_FALSE, _("Bad last.fm Username"),
 828             _("last.fm username is incorrect, please verify your settings")
 829         );
 830         PROTOCOL_ERROR
 831     }
 832
 833     p_buffer_pos = strstr( ( char* ) p_buffer, "UPDATE" );
 834     if ( p_buffer_pos )
 835     {
 836         /* protocol has been updated, time to update the code */
 837         msg_Dbg( p_intf, "Protocol updated : plugin may be outdated" );
 838         msg_Dbg( p_intf, "%s", p_buffer_pos );
 839     }
 840
 841     else
 842     {
 843         p_buffer_pos = strstr( ( char* ) p_buffer, "UPTODATE" );
 844         if ( !p_buffer_pos )
 845         {
 846             msg_Dbg( p_intf, "Can't recognize server protocol" );
 847             PROTOCOL_ERROR
 848         }
 849     }
 850
 851     psz_buffer_substring = strstr( p_buffer_pos, "\n" );
 852     if( ( psz_buffer_substring == NULL ) || \
 853             ( strlen( psz_buffer_substring + 1 ) < 32 ) )
 854     {
 855         msg_Dbg( p_intf, "Can't recognize server protocol" );
 856         PROTOCOL_ERROR
 857     }
 858     else
 859     {
 860         ps_challenge_md5 = malloc( 32 );
 861         MALLOC_CHECK( ps_challenge_md5 )
 862         memcpy( ps_challenge_md5, psz_buffer_substring + 1, 32 );
 863     }
 864
 865     p_buffer_pos = ( void* ) strstr( ( char* ) p_buffer, "http://" );
 866
 867     /* free old information */
 868     free( p_sys->psz_submit_host );
 869     free( p_sys->psz_submit_file );
 870
 871     psz_url_parser = p_buffer_pos + strlen( "http://" );
 872     i_url_pos = strcspn( psz_url_parser, ":" );
 873
 874     p_sys->psz_submit_host = strndup( psz_url_parser, i_url_pos );
 875     MALLOC_CHECK( p_sys->psz_submit_host )
 876
 877     p_sys->i_submit_port = atoi( psz_url_parser + i_url_pos + 1 );
 878
 879     psz_url_parser += strcspn( psz_url_parser , "/" ) + 1;
 880     i_url_pos = strcspn( psz_url_parser, "\n" );
 881     p_sys->psz_submit_file = strndup( psz_url_parser, i_url_pos );
 882     MALLOC_CHECK( p_sys->psz_submit_file )
 883
 884     free(p_buffer);
 885
 886     p_struct_md5 = malloc( sizeof( struct md5_s ) );
 887     MALLOC_CHECK( p_struct_md5 )
 888
 889     psz_password = config_GetPsz(p_this, "lastfm-password");
 890     MALLOC_CHECK( psz_password )
 891
 892     /* generates a md5 hash of the password */
 893     InitMD5( p_struct_md5 );
 894     AddMD5( p_struct_md5, ( uint8_t* ) psz_password, strlen( psz_password ) );
 895     EndMD5( p_struct_md5 );
 896
 897     free( psz_password );
 898
 899     psz_password_md5 = malloc ( 33 );
 900     MALLOC_CHECK( psz_password_md5 )
 901
 902     for ( i = 0; i < 4; i++ )
 903     {
 904         sprintf( &psz_password_md5[8*i], "%02x%02x%02x%02x",
 905             p_struct_md5->p_digest[i] & 0xff,
 906             ( p_struct_md5->p_digest[i] >> 8 ) & 0xff,
 907             ( p_struct_md5->p_digest[i] >> 16 ) & 0xff,
 908             p_struct_md5->p_digest[i] >> 24
 909         );
 910     }
 911
 912     /* generates a md5 hash of :
 913      * - md5 hash of the password, plus
 914      * - md5 challenge sent by last.fm server
 915      */
 916     InitMD5( p_struct_md5 );
 917     AddMD5( p_struct_md5, ( uint8_t* ) psz_password_md5, 32 );
 918     AddMD5( p_struct_md5, ( uint8_t* ) ps_challenge_md5, 32 );
 919     EndMD5( p_struct_md5 );
 920
 921     free( ps_challenge_md5 );
 922     free( psz_password_md5 );
 923
 924     for ( i = 0; i < 4; i++ )
 925     {
 926         sprintf( &p_sys->psz_response_md5[8*i], "%02x%02x%02x%02x",
 927             p_struct_md5->p_digest[i] & 0xff,
 928             ( p_struct_md5->p_digest[i] >> 8 ) & 0xff,
 929             ( p_struct_md5->p_digest[i] >> 16 ) & 0xff,
 930             p_struct_md5->p_digest[i] >> 24
 931         );
 932     }
 933
 934     p_sys->psz_response_md5[32] = '\0';
 935
 936     vlc_mutex_unlock ( &p_sys->lock );
 937
 938     return VLC_SUCCESS;
 939 #undef MEM_ERROR
 940 #undef PROTOCOL_ERROR
 941 #undef MALLOC_CHECK
 942 }
 943
 944 /*****************************************************************************
 945  * DeleteQueue : Free all songs from an audioscrobbler_queue_t
 946  *****************************************************************************/
 947 void DeleteQueue( audioscrobbler_queue_t *p_queue )
 948 {
 949     int     i;
 950
 951     for( i = 0; i < p_queue->i_songs_nb; i++ )
 952     {
 953         free( p_queue->p_queue[i]->psz_a );
 954         free( p_queue->p_queue[i]->psz_b );
 955         free( p_queue->p_queue[i]->psz_t );
 956         free( p_queue->p_queue[i]->psz_i );
 957         free( p_queue->p_queue[i] );
 958     }
 959 }
 960
 961 /*****************************************************************************
 962  * ReadMetaData : Read meta data when parsed by vlc
 963  * or wait for fetching if unavailable
 964  *****************************************************************************/
 965 static int ReadMetaData( intf_thread_t *p_this )
 966 {
 967     playlist_t          *p_playlist;
 968     input_thread_t      *p_input        = NULL;
 969     vlc_value_t         video_val;
 970
 971     char                *psz_title      = NULL;
 972     char                *psz_artist     = NULL;
 973     char                *psz_album      = NULL;
 974     char                *psz_trackid    = NULL;
 975     int                 i_length        = -1;
 976     vlc_bool_t          b_waiting;
 977     intf_sys_t          *p_sys          = p_this->p_sys;
 978     int                 i_status;
 979
 980     p_playlist = pl_Yield( p_this );
 981     PL_LOCK;
 982     p_input = p_playlist->p_input;
 983
 984     if( !p_input )
 985     {
 986         PL_UNLOCK;
 987         pl_Release( p_playlist );
 988         return( VLC_SUCCESS );
 989     }
 990
 991     vlc_object_yield( p_input );
 992     PL_UNLOCK;
 993     pl_Release( p_playlist );
 994
 995     var_Change( p_input, "video-es", VLC_VAR_CHOICESCOUNT, &video_val, NULL );
 996     if( ( video_val.i_int > 0 ) || \
 997         ( input_GetItem(p_input)->i_type == ITEM_TYPE_NET ) )
 998     {
 999         msg_Dbg( p_this, "Not an audio only local file -> no submission");
1000         vlc_object_release( p_input );
1001
1002         vlc_mutex_lock( &p_sys->lock );
1003         p_sys->b_queued = VLC_TRUE;
1004         p_sys->b_metadata_read = VLC_TRUE;
1005         vlc_mutex_unlock( &p_sys->lock );
1006
1007         return VLC_SUCCESS;
1008     }
1009
1010     #define FREE_INPUT_AND_CHARS \
1011         vlc_object_release( p_input ); \
1012         free( psz_title ); \
1013         free( psz_artist ); \
1014         free( psz_album ); \
1015         free( psz_trackid );
1016
1017     #define WAIT_METADATA_FETCHING( a ) \
1018         if ( b_waiting == VLC_TRUE ) \
1019         { \
1020             a = calloc( 1, 1 ); \
1021         } \
1022         else \
1023         { \
1024             vlc_object_release( p_input ); \
1025             vlc_mutex_lock( &p_sys->lock ); \
1026             p_sys->b_waiting_meta = VLC_TRUE; \
1027             vlc_mutex_unlock( &p_sys->lock ); \
1028             free( psz_artist ); \
1029             return VLC_SUCCESS; \
1030         }
1031
1032     #define ALLOC_ITEM_META( a, b ) \
1033         if ( input_GetItem(p_input)->b ) \
1034         { \
1035             a = encode_URI_component( \
1036                 input_GetItem(p_input)->b ); \
1037             if( !a ) \
1038             { \
1039                 FREE_INPUT_AND_CHARS \
1040                 return VLC_ENOMEM; \
1041             } \
1042         }
1043
1044     i_status = input_GetItem(p_input)->p_meta->i_status;
1045
1046     b_waiting = VLC_TRUE;
1047 /*  TODO: meta data fetching doesn't work atm
1048     vlc_mutex_lock( &p_sys->lock );
1049     b_waiting = p_sys->b_waiting_meta;
1050     vlc_mutex_unlock( &p_sys->lock );
1051 */
1052
1053     /* TODO: item preparsing is buggy on drag&drop and command line arguments
1054     if( i_status & ( !b_waiting ? ITEM_PREPARSED : ITEM_META_FETCHED ) )
1055     */
1056     if( 1 )
1057     {
1058         ALLOC_ITEM_META( psz_artist, p_meta->psz_artist )
1059         else
1060         {
1061             msg_Dbg( p_this, "No artist.." );
1062             WAIT_METADATA_FETCHING( psz_artist )
1063         }
1064
1065         ALLOC_ITEM_META( psz_title, psz_name )
1066         else
1067         {
1068             msg_Dbg( p_this, "No track name.." );
1069             WAIT_METADATA_FETCHING( psz_title );
1070         }
1071
1072         ALLOC_ITEM_META( psz_album, p_meta->psz_album )
1073         else
1074             psz_album = calloc( 1, 1 );
1075
1076         ALLOC_ITEM_META( psz_trackid, p_meta->psz_trackid )
1077         else
1078             psz_trackid = calloc( 1, 1 );
1079
1080         i_length = input_GetItem(p_input)->i_duration / 1000000;
1081
1082         vlc_mutex_lock ( &p_sys->lock );
1083
1084         p_sys->p_current_song->psz_a    = strdup( psz_artist );
1085         p_sys->p_current_song->psz_t    = strdup( psz_title );
1086         p_sys->p_current_song->psz_b    = strdup( psz_album );
1087         p_sys->p_current_song->psz_m    = strdup( psz_trackid );
1088         p_sys->p_current_song->i_l      = i_length;
1089         p_sys->b_queued                 = VLC_FALSE;
1090         p_sys->b_metadata_read          = VLC_TRUE;
1091
1092         vlc_mutex_unlock( &p_sys->lock );
1093
1094         msg_Dbg( p_this, "Meta data registered, waiting to be queued" );
1095     }
1096
1097     FREE_INPUT_AND_CHARS
1098     return VLC_SUCCESS;
1099 #undef FREE_INPUT_AND_CHARS
1100 #undef ALLOC_ITEM_META
1101 #undef WAIT_METADATA_FETCHING
1102 }