modules/access/cdda.c

   1 /*****************************************************************************
   2  * cdda.c : CD digital audio input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2003-2006, 2008-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@netcourrier.com>
   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  * Todo:
  27  *   - Improve CDDB support (non-blocking, cache, ...)
  28  *   - Fix tracknumber in MRL
  29  */
  30
  31 /*****************************************************************************
  32  * Preamble
  33  *****************************************************************************/
  34
  35 #ifdef HAVE_CONFIG_H
  36 # include "config.h"
  37 #endif
  38 #include <assert.h>
  39
  40 #include <vlc_common.h>
  41 #include <vlc_plugin.h>
  42 #include <vlc_input.h>
  43 #include <vlc_access.h>
  44 #include <vlc_meta.h>
  45 #include <vlc_charset.h> /* ToLocaleDup */
  46
  47 #include <vlc_codecs.h> /* For WAVEHEADER */
  48 #include "vcd/cdrom.h"  /* For CDDA_DATA_SIZE */
  49
  50 #ifdef HAVE_LIBCDDB
  51  #include <cddb/cddb.h>
  52  #include <errno.h>
  53 #endif
  54
  55 /*****************************************************************************
  56  * Module descriptior
  57  *****************************************************************************/
  58 static int  Open ( vlc_object_t * );
  59 static void Close( vlc_object_t * );
  60
  61 vlc_module_begin ()
  62     set_shortname( N_("Audio CD") )
  63     set_description( N_("Audio CD input") )
  64     set_capability( "access", 10 )
  65     set_category( CAT_INPUT )
  66     set_subcategory( SUBCAT_INPUT_ACCESS )
  67     set_callbacks( Open, Close )
  68
  69     add_usage_hint( N_("[cdda:][device][@[track]]") )
  70     add_integer( "cdda-track", 0 , NULL, NULL, true )
  71         change_volatile ()
  72     add_integer( "cdda-first-sector", -1, NULL, NULL, true )
  73         change_volatile ()
  74     add_integer( "cdda-last-sector", -1, NULL, NULL, true )
  75         change_volatile ()
  76
  77 #ifdef HAVE_LIBCDDB
  78     add_string( "cddb-server", "freedb.freedb.org", N_( "CDDB Server" ),
  79             N_( "Address of the CDDB server to use." ), true )
  80     add_integer( "cddb-port", 8880, N_( "CDDB port" ),
  81             N_( "CDDB Server port to use." ), true )
  82 #endif
  83
  84     add_shortcut( "cdda", "cddasimple" )
  85 vlc_module_end ()
  86
  87
  88 /* how many blocks VCDRead will read in each loop */
  89 #define CDDA_BLOCKS_ONCE 20
  90 #define CDDA_DATA_ONCE   (CDDA_BLOCKS_ONCE * CDDA_DATA_SIZE)
  91
  92 /*****************************************************************************
  93  * Access: local prototypes
  94  *****************************************************************************/
  95 struct access_sys_t
  96 {
  97     vcddev_t    *vcddev;                            /* vcd device descriptor */
  98
  99     /* Current position */
 100     int         i_sector;                                  /* Current Sector */
 101     int        *p_sectors;                                  /* Track sectors */
 102
 103     /* Wave header for the output data */
 104     WAVEHEADER  waveheader;
 105     bool        b_header;
 106
 107     int         i_track;
 108     int         i_first_sector;
 109     int         i_last_sector;
 110 };
 111
 112 static block_t *Block( access_t * );
 113 static int      Seek( access_t *, uint64_t );
 114 static int      Control( access_t *, int, va_list );
 115
 116 static int GetTracks( access_t *p_access, input_item_t *p_current );
 117
 118 #ifdef HAVE_LIBCDDB
 119 static cddb_disc_t *GetCDDBInfo( access_t *p_access, int i_titles, int *p_sectors );
 120 #endif
 121
 122 /*****************************************************************************
 123  * Open: open cdda
 124  *****************************************************************************/
 125 static int Open( vlc_object_t *p_this )
 126 {
 127     access_t     *p_access = (access_t*)p_this;
 128     access_sys_t *p_sys;
 129     vcddev_t     *vcddev;
 130     char         *psz_name;
 131
 132     if( !p_access->psz_filepath || !*p_access->psz_filepath )
 133     {
 134         /* Only when selected */
 135         if( !p_access->psz_access || !*p_access->psz_access )
 136             return VLC_EGENERIC;
 137
 138         psz_name = var_InheritString( p_this, "cd-audio" );
 139         if( !psz_name )
 140             return VLC_EGENERIC;
 141     }
 142     else psz_name = ToLocaleDup( p_access->psz_filepath );
 143
 144 #if defined( WIN32 ) || defined( __OS2__ )
 145     if( psz_name[0] && psz_name[1] == ':' &&
 146         psz_name[2] == '\\' && psz_name[3] == '\0' ) psz_name[2] = '\0';
 147 #endif
 148
 149     /* Open CDDA */
 150     if( (vcddev = ioctl_Open( VLC_OBJECT(p_access), psz_name ) ) == NULL )
 151     {
 152         msg_Warn( p_access, "could not open %s", psz_name );
 153         free( psz_name );
 154         return VLC_EGENERIC;
 155     }
 156     free( psz_name );
 157
 158     /* Set up p_access */
 159     STANDARD_BLOCK_ACCESS_INIT
 160     p_sys->vcddev = vcddev;
 161
 162    /* Do we play a single track ? */
 163    p_sys->i_track = var_InheritInteger( p_access, "cdda-track" ) - 1;
 164
 165    if( p_sys->i_track < 0 )
 166    {
 167         /* We only do separate items if the whole disc is requested */
 168         input_thread_t *p_input = access_GetParentInput( p_access );
 169
 170         int i_ret = -1;
 171         if( p_input )
 172         {
 173             input_item_t *p_current = input_GetItem( p_input );
 174             if( p_current )
 175                 i_ret = GetTracks( p_access, p_current );
 176
 177             vlc_object_release( p_input );
 178         }
 179         if( i_ret < 0 )
 180             goto error;
 181     }
 182     else
 183     {
 184         /* Build a WAV header for the output data */
 185         memset( &p_sys->waveheader, 0, sizeof(WAVEHEADER) );
 186         SetWLE( &p_sys->waveheader.Format, 1 ); /*WAVE_FORMAT_PCM*/
 187         SetWLE( &p_sys->waveheader.BitsPerSample, 16);
 188         p_sys->waveheader.MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
 189         p_sys->waveheader.Length = 0;               /* we just don't know */
 190         p_sys->waveheader.ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
 191         p_sys->waveheader.SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
 192         SetDWLE( &p_sys->waveheader.SubChunkLength, 16);
 193         SetWLE( &p_sys->waveheader.Modus, 2);
 194         SetDWLE( &p_sys->waveheader.SampleFreq, 44100);
 195         SetWLE( &p_sys->waveheader.BytesPerSample,
 196                     2 /*Modus*/ * 16 /*BitsPerSample*/ / 8 );
 197         SetDWLE( &p_sys->waveheader.BytesPerSec,
 198                     2*16/8 /*BytesPerSample*/ * 44100 /*SampleFreq*/ );
 199         p_sys->waveheader.DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
 200         p_sys->waveheader.DataLength = 0;           /* we just don't know */
 201
 202         p_sys->i_first_sector = var_InheritInteger( p_access,
 203                                                     "cdda-first-sector" );
 204         p_sys->i_last_sector  = var_InheritInteger( p_access,
 205                                                     "cdda-last-sector" );
 206         /* Tracknumber in MRL */
 207         if( p_sys->i_first_sector < 0 || p_sys->i_last_sector < 0 )
 208         {
 209             const int i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
 210                                                      p_sys->vcddev, &p_sys->p_sectors );
 211             if( p_sys->i_track >= i_titles )
 212             {
 213                 msg_Err( p_access, "invalid track number" );
 214                 goto error;
 215             }
 216             p_sys->i_first_sector = p_sys->p_sectors[p_sys->i_track];
 217             p_sys->i_last_sector = p_sys->p_sectors[p_sys->i_track+1];
 218         }
 219
 220         p_sys->i_sector = p_sys->i_first_sector;
 221         p_access->info.i_size = (p_sys->i_last_sector - p_sys->i_first_sector)
 222                                      * (int64_t)CDDA_DATA_SIZE;
 223     }
 224
 225     return VLC_SUCCESS;
 226
 227 error:
 228     free( p_sys->p_sectors );
 229     ioctl_Close( VLC_OBJECT(p_access), p_sys->vcddev );
 230     free( p_sys );
 231     return VLC_EGENERIC;
 232 }
 233
 234 /*****************************************************************************
 235  * Close: closes cdda
 236  *****************************************************************************/
 237 static void Close( vlc_object_t *p_this )
 238 {
 239     access_t     *p_access = (access_t *)p_this;
 240     access_sys_t *p_sys = p_access->p_sys;
 241
 242     free( p_sys->p_sectors );
 243     ioctl_Close( p_this, p_sys->vcddev );
 244     free( p_sys );
 245 }
 246
 247 /*****************************************************************************
 248  * Block: read data (CDDA_DATA_ONCE)
 249  *****************************************************************************/
 250 static block_t *Block( access_t *p_access )
 251 {
 252     access_sys_t *p_sys = p_access->p_sys;
 253     int i_blocks = CDDA_BLOCKS_ONCE;
 254     block_t *p_block;
 255
 256     if( p_sys->i_track < 0 ) p_access->info.b_eof = true;
 257
 258     /* Check end of file */
 259     if( p_access->info.b_eof ) return NULL;
 260
 261     if( !p_sys->b_header )
 262     {
 263         /* Return only the header */
 264         p_block = block_New( p_access, sizeof( WAVEHEADER ) );
 265         memcpy( p_block->p_buffer, &p_sys->waveheader, sizeof(WAVEHEADER) );
 266         p_sys->b_header = true;
 267         return p_block;
 268     }
 269
 270     if( p_sys->i_sector >= p_sys->i_last_sector )
 271     {
 272         p_access->info.b_eof = true;
 273         return NULL;
 274     }
 275
 276     /* Don't read too far */
 277     if( p_sys->i_sector + i_blocks >= p_sys->i_last_sector )
 278         i_blocks = p_sys->i_last_sector - p_sys->i_sector;
 279
 280     /* Do the actual reading */
 281     if( !( p_block = block_New( p_access, i_blocks * CDDA_DATA_SIZE ) ) )
 282     {
 283         msg_Err( p_access, "cannot get a new block of size: %i",
 284                  i_blocks * CDDA_DATA_SIZE );
 285         return NULL;
 286     }
 287
 288     if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
 289             p_sys->i_sector, p_block->p_buffer, i_blocks, CDDA_TYPE ) < 0 )
 290     {
 291         msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
 292         block_Release( p_block );
 293
 294         /* Try to skip one sector (in case of bad sectors) */
 295         p_sys->i_sector++;
 296         p_access->info.i_pos += CDDA_DATA_SIZE;
 297         return NULL;
 298     }
 299
 300     /* Update a few values */
 301     p_sys->i_sector += i_blocks;
 302     p_access->info.i_pos += p_block->i_buffer;
 303
 304     return p_block;
 305 }
 306
 307 /****************************************************************************
 308  * Seek
 309  ****************************************************************************/
 310 static int Seek( access_t *p_access, uint64_t i_pos )
 311 {
 312     access_sys_t *p_sys = p_access->p_sys;
 313
 314     /* Next sector to read */
 315     p_sys->i_sector = p_sys->i_first_sector + i_pos / CDDA_DATA_SIZE;
 316     assert( p_sys->i_sector >= 0 );
 317     p_access->info.i_pos = i_pos;
 318
 319     return VLC_SUCCESS;
 320 }
 321
 322 /*****************************************************************************
 323  * Control:
 324  *****************************************************************************/
 325 static int Control( access_t *p_access, int i_query, va_list args )
 326 {
 327     switch( i_query )
 328     {
 329         case ACCESS_CAN_SEEK:
 330         case ACCESS_CAN_FASTSEEK:
 331         case ACCESS_CAN_PAUSE:
 332         case ACCESS_CAN_CONTROL_PACE:
 333             *va_arg( args, bool* ) = true;
 334             break;
 335
 336         case ACCESS_GET_PTS_DELAY:
 337             *va_arg( args, int64_t * ) =
 338                 INT64_C(1000) * var_InheritInteger( p_access, "disc-caching" );
 339             break;
 340
 341         case ACCESS_SET_PAUSE_STATE:
 342             break;
 343
 344         case ACCESS_GET_TITLE_INFO:
 345         case ACCESS_SET_TITLE:
 346         case ACCESS_GET_META:
 347         case ACCESS_SET_SEEKPOINT:
 348         case ACCESS_SET_PRIVATE_ID_STATE:
 349         case ACCESS_GET_CONTENT_TYPE:
 350             return VLC_EGENERIC;
 351
 352         default:
 353             msg_Warn( p_access, "unimplemented query in control" );
 354             return VLC_EGENERIC;
 355     }
 356     return VLC_SUCCESS;
 357 }
 358
 359 static int GetTracks( access_t *p_access, input_item_t *p_current )
 360 {
 361     access_sys_t *p_sys = p_access->p_sys;
 362
 363     const int i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
 364                                              p_sys->vcddev, &p_sys->p_sectors );
 365     if( i_titles <= 0 )
 366     {
 367         if( i_titles < 0 )
 368             msg_Err( p_access, "unable to count tracks" );
 369         else if( i_titles <= 0 )
 370             msg_Err( p_access, "no audio tracks found" );
 371         return VLC_EGENERIC;;
 372     }
 373
 374     /* */
 375     input_item_SetName( p_current, "Audio CD" );
 376
 377     const char *psz_album = NULL;
 378     const char *psz_year = NULL;
 379     const char *psz_genre = NULL;
 380     const char *psz_artist = NULL;
 381     const char *psz_description = NULL;
 382
 383 /* Return true if the given string is not NULL and not empty */
 384 #define NONEMPTY( psz ) ( (psz) && *(psz) )
 385 /* If the given string is NULL or empty, fill it by the return value of 'code' */
 386 #define ON_EMPTY( psz, code ) do { if( !NONEMPTY( psz) ) { (psz) = code; } } while(0)
 387
 388     /* Retreive CDDB information */
 389 #ifdef HAVE_LIBCDDB
 390     char psz_year_buffer[4+1];
 391     msg_Dbg( p_access, "fetching infos with CDDB" );
 392     cddb_disc_t *p_disc = GetCDDBInfo( p_access, i_titles, p_sys->p_sectors );
 393     if( p_disc )
 394     {
 395         psz_album = cddb_disc_get_title( p_disc );
 396         psz_genre = cddb_disc_get_genre( p_disc );
 397
 398         /* */
 399         const unsigned i_year = cddb_disc_get_year( p_disc );
 400         if( i_year > 0 )
 401         {
 402             psz_year = psz_year_buffer;
 403             snprintf( psz_year_buffer, sizeof(psz_year_buffer), "%u", i_year );
 404         }
 405
 406         /* Set artist only if unique */
 407         for( int i = 0; i < i_titles; i++ )
 408         {
 409             cddb_track_t *t = cddb_disc_get_track( p_disc, i );
 410             if( !t )
 411                 continue;
 412             const char *psz_track_artist = cddb_track_get_artist( t );
 413             if( psz_artist && psz_track_artist &&
 414                 strcmp( psz_artist, psz_track_artist ) )
 415             {
 416                 psz_artist = NULL;
 417                 break;
 418             }
 419             psz_artist = psz_track_artist;
 420         }
 421     }
 422 #endif
 423
 424     /* CD-Text */
 425     vlc_meta_t **pp_cd_text;
 426     int        i_cd_text;
 427
 428     if( ioctl_GetCdText( VLC_OBJECT(p_access), p_sys->vcddev, &pp_cd_text, &i_cd_text ) )
 429     {
 430         msg_Dbg( p_access, "CD-TEXT information missing" );
 431         i_cd_text = 0;
 432         pp_cd_text = NULL;
 433     }
 434
 435     /* Retrieve CD-TEXT information but prefer CDDB */
 436     if( i_cd_text > 0 && pp_cd_text[0] )
 437     {
 438         const vlc_meta_t *p_disc = pp_cd_text[0];
 439         ON_EMPTY( psz_album,       vlc_meta_Get( p_disc, vlc_meta_Album ) );
 440         ON_EMPTY( psz_genre,       vlc_meta_Get( p_disc, vlc_meta_Genre ) );
 441         ON_EMPTY( psz_artist,      vlc_meta_Get( p_disc, vlc_meta_Artist ) );
 442         ON_EMPTY( psz_description, vlc_meta_Get( p_disc, vlc_meta_Description ) );
 443     }
 444
 445     if( NONEMPTY( psz_album ) )
 446     {
 447         input_item_SetName( p_current, psz_album );
 448         input_item_SetAlbum( p_current, psz_album );
 449     }
 450
 451     if( NONEMPTY( psz_genre ) )
 452         input_item_SetGenre( p_current, psz_genre );
 453
 454     if( NONEMPTY( psz_artist ) )
 455         input_item_SetArtist( p_current, psz_artist );
 456
 457     if( NONEMPTY( psz_year ) )
 458         input_item_SetDate( p_current, psz_year );
 459
 460     if( NONEMPTY( psz_description ) )
 461         input_item_SetDescription( p_current, psz_description );
 462
 463     const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i_titles] - p_sys->p_sectors[0] ) *
 464                                CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
 465     input_item_SetDuration( p_current, i_duration );
 466
 467     input_item_node_t *p_root = input_item_node_Create( p_current );
 468
 469     /* Build title table */
 470     for( int i = 0; i < i_titles; i++ )
 471     {
 472         input_item_t *p_input_item;
 473
 474         char *psz_uri, *psz_opt, *psz_first, *psz_last;
 475         char *psz_name;
 476
 477         msg_Dbg( p_access, "track[%d] start=%d", i, p_sys->p_sectors[i] );
 478
 479         /* */
 480         if( asprintf( &psz_uri, "cdda://%s", p_access->psz_location ) == -1 )
 481             psz_uri = NULL;
 482         if( asprintf( &psz_opt, "cdda-track=%i", i+1 ) == -1 )
 483             psz_opt = NULL;
 484         if( asprintf( &psz_first, "cdda-first-sector=%i",p_sys->p_sectors[i] ) == -1 )
 485             psz_first = NULL;
 486         if( asprintf( &psz_last, "cdda-last-sector=%i", p_sys->p_sectors[i+1] ) == -1 )
 487             psz_last = NULL;
 488
 489         /* Define a "default name" */
 490         if( asprintf( &psz_name, _("Audio CD - Track %02i"), (i+1) ) == -1 )
 491             psz_name = NULL;
 492
 493         /* Create playlist items */
 494         const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i+1] - p_sys->p_sectors[i] ) *
 495                                    CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
 496         p_input_item = input_item_NewWithType( psz_uri, psz_name, 0, NULL, 0,
 497                                                i_duration, ITEM_TYPE_DISC );
 498         input_item_CopyOptions( p_current, p_input_item );
 499         input_item_AddOption( p_input_item, psz_first, VLC_INPUT_OPTION_TRUSTED );
 500         input_item_AddOption( p_input_item, psz_last, VLC_INPUT_OPTION_TRUSTED );
 501         input_item_AddOption( p_input_item, psz_opt, VLC_INPUT_OPTION_TRUSTED );
 502
 503         const char *psz_track_title = NULL;
 504         const char *psz_track_artist = NULL;
 505         const char *psz_track_genre = NULL;
 506         const char *psz_track_description = NULL;
 507
 508 #ifdef HAVE_LIBCDDB
 509         /* Retreive CDDB information */
 510         if( p_disc )
 511         {
 512             cddb_track_t *t = cddb_disc_get_track( p_disc, i );
 513             if( t != NULL )
 514             {
 515                 psz_track_title = cddb_track_get_title( t );
 516                 psz_track_artist = cddb_track_get_artist( t );
 517             }
 518         }
 519 #endif
 520
 521         /* Retreive CD-TEXT information but prefer CDDB */
 522         if( i+1 < i_cd_text && pp_cd_text[i+1] )
 523         {
 524             const vlc_meta_t *t = pp_cd_text[i+1];
 525
 526             ON_EMPTY( psz_track_title,       vlc_meta_Get( t, vlc_meta_Title ) );
 527             ON_EMPTY( psz_track_artist,      vlc_meta_Get( t, vlc_meta_Artist ) );
 528             ON_EMPTY( psz_track_genre,       vlc_meta_Get( t, vlc_meta_Genre ) );
 529             ON_EMPTY( psz_track_description, vlc_meta_Get( t, vlc_meta_Description ) );
 530         }
 531
 532         /* */
 533         ON_EMPTY( psz_track_artist,       psz_artist );
 534         ON_EMPTY( psz_track_genre,        psz_genre );
 535         ON_EMPTY( psz_track_description,  psz_description );
 536
 537         /* */
 538         if( NONEMPTY( psz_track_title ) )
 539         {
 540             input_item_SetName( p_input_item, psz_track_title );
 541             input_item_SetTitle( p_input_item, psz_track_title );
 542         }
 543
 544         if( NONEMPTY( psz_track_artist ) )
 545             input_item_SetArtist( p_input_item, psz_track_artist );
 546
 547         if( NONEMPTY( psz_track_genre ) )
 548             input_item_SetGenre( p_input_item, psz_track_genre );
 549
 550         if( NONEMPTY( psz_track_description ) )
 551             input_item_SetDescription( p_input_item, psz_track_description );
 552
 553         if( NONEMPTY( psz_album ) )
 554             input_item_SetAlbum( p_input_item, psz_album );
 555
 556         if( NONEMPTY( psz_year ) )
 557             input_item_SetDate( p_input_item, psz_year );
 558
 559         char psz_num[3+1];
 560         snprintf( psz_num, sizeof(psz_num), "%d", 1+i );
 561         input_item_SetTrackNum( p_input_item, psz_num );
 562
 563         input_item_node_AppendItem( p_root, p_input_item );
 564         vlc_gc_decref( p_input_item );
 565         free( psz_uri ); free( psz_opt ); free( psz_name );
 566         free( psz_first ); free( psz_last );
 567     }
 568 #undef ON_EMPTY
 569 #undef NONEMPTY
 570
 571     input_item_node_PostAndDelete( p_root );
 572
 573     /* */
 574     for( int i = 0; i < i_cd_text; i++ )
 575     {
 576         vlc_meta_t *p_meta = pp_cd_text[i];
 577         if( !p_meta )
 578             continue;
 579         vlc_meta_Delete( p_meta );
 580     }
 581     free( pp_cd_text );
 582
 583 #ifdef HAVE_LIBCDDB
 584     if( p_disc )
 585         cddb_disc_destroy( p_disc );
 586 #endif
 587     return VLC_SUCCESS;
 588 }
 589
 590 #ifdef HAVE_LIBCDDB
 591 static cddb_disc_t *GetCDDBInfo( access_t *p_access, int i_titles, int *p_sectors )
 592 {
 593     if( var_InheritInteger( p_access, "album-art" ) == ALBUM_ART_WHEN_ASKED )
 594         return NULL;
 595
 596     /* */
 597     cddb_conn_t *p_cddb = cddb_new();
 598     if( !p_cddb )
 599     {
 600         msg_Warn( p_access, "unable to use CDDB" );
 601         return NULL;
 602     }
 603
 604     /* */
 605     char *psz_tmp = var_InheritString( p_access, "cddb-server" );
 606     if( psz_tmp )
 607     {
 608         cddb_set_server_name( p_cddb, psz_tmp );
 609         free( psz_tmp );
 610     }
 611
 612     cddb_set_server_port( p_cddb, var_InheritInteger( p_access, "cddb-port" ) );
 613
 614     cddb_set_email_address( p_cddb, "vlc@videolan.org" );
 615
 616     /// \todo
 617     cddb_cache_disable( p_cddb );
 618
 619 //    cddb_cache_set_dir( p_cddb,
 620 //                     var_InheritString( p_access,
 621 //                                    MODULE_STRING "-cddb-cachedir") );
 622
 623     cddb_set_timeout( p_cddb, 10 );
 624
 625     /// \todo
 626     cddb_http_disable( p_cddb );
 627
 628     /* */
 629     cddb_disc_t *p_disc = cddb_disc_new();
 630     if( !p_disc )
 631     {
 632         msg_Err( p_access, "unable to create CDDB disc structure." );
 633         goto error;
 634     }
 635
 636     int64_t i_length = 0;
 637     for( int i = 0; i < i_titles; i++ )
 638     {
 639         cddb_track_t *t = cddb_track_new();
 640         cddb_track_set_frame_offset( t, p_sectors[i] );
 641         cddb_disc_add_track( p_disc, t );
 642         const int64_t i_size = ( p_sectors[i+1] - p_sectors[i] ) *
 643                                (int64_t)CDDA_DATA_SIZE;
 644         i_length += INT64_C(1000000) * i_size / 44100 / 4  ;
 645     }
 646
 647     cddb_disc_set_length( p_disc, (int)(i_length/1000000) );
 648
 649     if( !cddb_disc_calc_discid( p_disc ) )
 650     {
 651         msg_Err( p_access, "CDDB disc ID calculation failed" );
 652         goto error;
 653     }
 654
 655     const int i_matches = cddb_query( p_cddb, p_disc );
 656     if( i_matches < 0 )
 657     {
 658         msg_Warn( p_access, "CDDB error: %s", cddb_error_str(errno) );
 659         goto error;
 660     }
 661     else if( i_matches == 0 )
 662     {
 663         msg_Dbg( p_access, "Couldn't find any matches in CDDB." );
 664         goto error;
 665     }
 666     else if( i_matches > 1 )
 667         msg_Warn( p_access, "found %d matches in CDDB. Using first one.", i_matches );
 668
 669     cddb_read( p_cddb, p_disc );
 670
 671     cddb_destroy( p_cddb);
 672     return p_disc;
 673
 674 error:
 675     if( p_disc )
 676         cddb_disc_destroy( p_disc );
 677     cddb_destroy( p_cddb );
 678     return NULL;
 679 }
 680 #endif /*HAVE_LIBCDDB*/
 681