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 #define CACHING_TEXT N_("Caching value in ms")
  62 #define CACHING_LONGTEXT N_( \
  63     "Default caching value for Audio CDs. This " \
  64     "value should be set in milliseconds." )
  65
  66 vlc_module_begin ()
  67     set_shortname( N_("Audio CD") )
  68     set_description( N_("Audio CD input") )
  69     set_capability( "access", 10 )
  70     set_category( CAT_INPUT )
  71     set_subcategory( SUBCAT_INPUT_ACCESS )
  72     set_callbacks( Open, Close )
  73
  74     add_usage_hint( N_("[cdda:][device][@[track]]") )
  75     add_integer( "cdda-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
  76                  CACHING_LONGTEXT, true )
  77         change_safe()
  78
  79     add_integer( "cdda-track", 0 , NULL, NULL, NULL, true )
  80         change_volatile ()
  81     add_integer( "cdda-first-sector", -1, NULL, NULL, NULL, true )
  82         change_volatile ()
  83     add_integer( "cdda-last-sector", -1, NULL, NULL, NULL, true )
  84         change_volatile ()
  85
  86 #ifdef HAVE_LIBCDDB
  87     add_string( "cddb-server", "freedb.freedb.org", NULL, N_( "CDDB Server" ),
  88             N_( "Address of the CDDB server to use." ), true )
  89     add_integer( "cddb-port", 8880, NULL, N_( "CDDB port" ),
  90             N_( "CDDB Server port to use." ), true )
  91 #endif
  92
  93     add_shortcut( "cdda" )
  94     add_shortcut( "cddasimple" )
  95 vlc_module_end ()
  96
  97
  98 /* how many blocks VCDRead will read in each loop */
  99 #define CDDA_BLOCKS_ONCE 20
 100 #define CDDA_DATA_ONCE   (CDDA_BLOCKS_ONCE * CDDA_DATA_SIZE)
 101
 102 /*****************************************************************************
 103  * Access: local prototypes
 104  *****************************************************************************/
 105 struct access_sys_t
 106 {
 107     vcddev_t    *vcddev;                            /* vcd device descriptor */
 108
 109     /* Current position */
 110     int         i_sector;                                  /* Current Sector */
 111     int        *p_sectors;                                  /* Track sectors */
 112
 113     /* Wave header for the output data */
 114     WAVEHEADER  waveheader;
 115     bool        b_header;
 116
 117     int         i_track;
 118     int         i_first_sector;
 119     int         i_last_sector;
 120 };
 121
 122 static block_t *Block( access_t * );
 123 static int      Seek( access_t *, uint64_t );
 124 static int      Control( access_t *, int, va_list );
 125
 126 static int GetTracks( access_t *p_access, input_item_t *p_current );
 127
 128 #ifdef HAVE_LIBCDDB
 129 static cddb_disc_t *GetCDDBInfo( access_t *p_access, int i_titles, int *p_sectors );
 130 #endif
 131
 132 /*****************************************************************************
 133  * Open: open cdda
 134  *****************************************************************************/
 135 static int Open( vlc_object_t *p_this )
 136 {
 137     access_t     *p_access = (access_t*)p_this;
 138     access_sys_t *p_sys;
 139     vcddev_t     *vcddev;
 140     char         *psz_name;
 141
 142     if( !p_access->psz_filepath || !*p_access->psz_filepath )
 143     {
 144         /* Only when selected */
 145         if( !p_access->psz_access || !*p_access->psz_access )
 146             return VLC_EGENERIC;
 147
 148         psz_name = var_CreateGetString( p_this, "cd-audio" );
 149         if( !psz_name || !*psz_name )
 150         {
 151             free( psz_name );
 152             return VLC_EGENERIC;
 153         }
 154     }
 155     else psz_name = ToLocaleDup( p_access->psz_filepath );
 156
 157 #ifdef WIN32
 158     if( psz_name[0] && psz_name[1] == ':' &&
 159         psz_name[2] == '\\' && psz_name[3] == '\0' ) psz_name[2] = '\0';
 160 #endif
 161
 162     /* Open CDDA */
 163     if( (vcddev = ioctl_Open( VLC_OBJECT(p_access), psz_name ) ) == NULL )
 164     {
 165         msg_Warn( p_access, "could not open %s", psz_name );
 166         free( psz_name );
 167         return VLC_EGENERIC;
 168     }
 169     free( psz_name );
 170
 171     /* Set up p_access */
 172     STANDARD_BLOCK_ACCESS_INIT
 173     p_sys->vcddev = vcddev;
 174
 175    /* Do we play a single track ? */
 176    p_sys->i_track = var_CreateGetInteger( p_access, "cdda-track" ) - 1;
 177
 178    if( p_sys->i_track < 0 )
 179    {
 180         /* We only do separate items if the whole disc is requested */
 181         input_thread_t *p_input = access_GetParentInput( p_access );
 182
 183         int i_ret = -1;
 184         if( p_input )
 185         {
 186             input_item_t *p_current = input_GetItem( p_input );
 187             if( p_current )
 188                 i_ret = GetTracks( p_access, p_current );
 189
 190             vlc_object_release( p_input );
 191         }
 192         if( i_ret < 0 )
 193             goto error;
 194     }
 195     else
 196     {
 197         /* Build a WAV header for the output data */
 198         memset( &p_sys->waveheader, 0, sizeof(WAVEHEADER) );
 199         SetWLE( &p_sys->waveheader.Format, 1 ); /*WAVE_FORMAT_PCM*/
 200         SetWLE( &p_sys->waveheader.BitsPerSample, 16);
 201         p_sys->waveheader.MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
 202         p_sys->waveheader.Length = 0;               /* we just don't know */
 203         p_sys->waveheader.ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
 204         p_sys->waveheader.SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
 205         SetDWLE( &p_sys->waveheader.SubChunkLength, 16);
 206         SetWLE( &p_sys->waveheader.Modus, 2);
 207         SetDWLE( &p_sys->waveheader.SampleFreq, 44100);
 208         SetWLE( &p_sys->waveheader.BytesPerSample,
 209                     2 /*Modus*/ * 16 /*BitsPerSample*/ / 8 );
 210         SetDWLE( &p_sys->waveheader.BytesPerSec,
 211                     2*16/8 /*BytesPerSample*/ * 44100 /*SampleFreq*/ );
 212         p_sys->waveheader.DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
 213         p_sys->waveheader.DataLength = 0;           /* we just don't know */
 214
 215         p_sys->i_first_sector = var_CreateGetInteger( p_access,
 216                                                       "cdda-first-sector" );
 217         p_sys->i_last_sector  = var_CreateGetInteger( p_access,
 218                                                       "cdda-last-sector" );
 219         /* Tracknumber in MRL */
 220         if( p_sys->i_first_sector < 0 || p_sys->i_last_sector < 0 )
 221         {
 222             const int i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
 223                                                      p_sys->vcddev, &p_sys->p_sectors );
 224             if( p_sys->i_track >= i_titles )
 225             {
 226                 msg_Err( p_access, "invalid track number" );
 227                 goto error;
 228             }
 229             p_sys->i_first_sector = p_sys->p_sectors[p_sys->i_track];
 230             p_sys->i_last_sector = p_sys->p_sectors[p_sys->i_track+1];
 231         }
 232
 233         p_sys->i_sector = p_sys->i_first_sector;
 234         p_access->info.i_size = (p_sys->i_last_sector - p_sys->i_first_sector)
 235                                      * (int64_t)CDDA_DATA_SIZE;
 236     }
 237
 238     /* PTS delay */
 239     var_Create( p_access, "cdda-caching", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 240
 241     return VLC_SUCCESS;
 242
 243 error:
 244     free( p_sys->p_sectors );
 245     ioctl_Close( VLC_OBJECT(p_access), p_sys->vcddev );
 246     free( p_sys );
 247     return VLC_EGENERIC;
 248 }
 249
 250 /*****************************************************************************
 251  * Close: closes cdda
 252  *****************************************************************************/
 253 static void Close( vlc_object_t *p_this )
 254 {
 255     access_t     *p_access = (access_t *)p_this;
 256     access_sys_t *p_sys = p_access->p_sys;
 257
 258     free( p_sys->p_sectors );
 259     ioctl_Close( p_this, p_sys->vcddev );
 260     free( p_sys );
 261 }
 262
 263 /*****************************************************************************
 264  * Block: read data (CDDA_DATA_ONCE)
 265  *****************************************************************************/
 266 static block_t *Block( access_t *p_access )
 267 {
 268     access_sys_t *p_sys = p_access->p_sys;
 269     int i_blocks = CDDA_BLOCKS_ONCE;
 270     block_t *p_block;
 271
 272     if( p_sys->i_track < 0 ) p_access->info.b_eof = true;
 273
 274     /* Check end of file */
 275     if( p_access->info.b_eof ) return NULL;
 276
 277     if( !p_sys->b_header )
 278     {
 279         /* Return only the header */
 280         p_block = block_New( p_access, sizeof( WAVEHEADER ) );
 281         memcpy( p_block->p_buffer, &p_sys->waveheader, sizeof(WAVEHEADER) );
 282         p_sys->b_header = true;
 283         return p_block;
 284     }
 285
 286     if( p_sys->i_sector >= p_sys->i_last_sector )
 287     {
 288         p_access->info.b_eof = true;
 289         return NULL;
 290     }
 291
 292     /* Don't read too far */
 293     if( p_sys->i_sector + i_blocks >= p_sys->i_last_sector )
 294         i_blocks = p_sys->i_last_sector - p_sys->i_sector;
 295
 296     /* Do the actual reading */
 297     if( !( p_block = block_New( p_access, i_blocks * CDDA_DATA_SIZE ) ) )
 298     {
 299         msg_Err( p_access, "cannot get a new block of size: %i",
 300                  i_blocks * CDDA_DATA_SIZE );
 301         return NULL;
 302     }
 303
 304     if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
 305             p_sys->i_sector, p_block->p_buffer, i_blocks, CDDA_TYPE ) < 0 )
 306     {
 307         msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
 308         block_Release( p_block );
 309
 310         /* Try to skip one sector (in case of bad sectors) */
 311         p_sys->i_sector++;
 312         p_access->info.i_pos += CDDA_DATA_SIZE;
 313         return NULL;
 314     }
 315
 316     /* Update a few values */
 317     p_sys->i_sector += i_blocks;
 318     p_access->info.i_pos += p_block->i_buffer;
 319
 320     return p_block;
 321 }
 322
 323 /****************************************************************************
 324  * Seek
 325  ****************************************************************************/
 326 static int Seek( access_t *p_access, uint64_t i_pos )
 327 {
 328     access_sys_t *p_sys = p_access->p_sys;
 329
 330     /* Next sector to read */
 331     p_sys->i_sector = p_sys->i_first_sector + i_pos / CDDA_DATA_SIZE;
 332     assert( p_sys->i_sector >= 0 );
 333     p_access->info.i_pos = i_pos;
 334
 335     return VLC_SUCCESS;
 336 }
 337
 338 /*****************************************************************************
 339  * Control:
 340  *****************************************************************************/
 341 static int Control( access_t *p_access, int i_query, va_list args )
 342 {
 343     switch( i_query )
 344     {
 345         case ACCESS_CAN_SEEK:
 346         case ACCESS_CAN_FASTSEEK:
 347         case ACCESS_CAN_PAUSE:
 348         case ACCESS_CAN_CONTROL_PACE:
 349             *va_arg( args, bool* ) = true;
 350             break;
 351
 352         case ACCESS_GET_PTS_DELAY:
 353             *va_arg( args, int64_t * ) =
 354                    var_GetInteger( p_access, "cdda-caching" ) * INT64_C(1000);
 355             break;
 356
 357         case ACCESS_SET_PAUSE_STATE:
 358             break;
 359
 360         case ACCESS_GET_TITLE_INFO:
 361         case ACCESS_SET_TITLE:
 362         case ACCESS_GET_META:
 363         case ACCESS_SET_SEEKPOINT:
 364         case ACCESS_SET_PRIVATE_ID_STATE:
 365         case ACCESS_GET_CONTENT_TYPE:
 366             return VLC_EGENERIC;
 367
 368         default:
 369             msg_Warn( p_access, "unimplemented query in control" );
 370             return VLC_EGENERIC;
 371     }
 372     return VLC_SUCCESS;
 373 }
 374
 375 static int GetTracks( access_t *p_access, input_item_t *p_current )
 376 {
 377     access_sys_t *p_sys = p_access->p_sys;
 378
 379     const int i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
 380                                              p_sys->vcddev, &p_sys->p_sectors );
 381     if( i_titles <= 0 )
 382     {
 383         if( i_titles < 0 )
 384             msg_Err( p_access, "unable to count tracks" );
 385         else if( i_titles <= 0 )
 386             msg_Err( p_access, "no audio tracks found" );
 387         return VLC_EGENERIC;;
 388     }
 389
 390     /* */
 391     input_item_SetName( p_current, "Audio CD" );
 392
 393     const char *psz_album = NULL;
 394     const char *psz_year = NULL;
 395     const char *psz_genre = NULL;
 396     const char *psz_artist = NULL;
 397     const char *psz_description = NULL;
 398
 399 /* Return true if the given string is not NULL and not empty */
 400 #define NONEMPTY( psz ) ( (psz) && *(psz) )
 401 /* If the given string is NULL or empty, fill it by the return value of 'code' */
 402 #define ON_EMPTY( psz, code ) do { if( !NONEMPTY( psz) ) { (psz) = code; } } while(0)
 403
 404     /* Retreive CDDB informations */
 405 #ifdef HAVE_LIBCDDB
 406     char psz_year_buffer[4+1];
 407     msg_Dbg( p_access, "fetching infos with CDDB" );
 408     cddb_disc_t *p_disc = GetCDDBInfo( p_access, i_titles, p_sys->p_sectors );
 409     if( p_disc )
 410     {
 411         psz_album = cddb_disc_get_title( p_disc );
 412         psz_genre = cddb_disc_get_genre( p_disc );
 413
 414         /* */
 415         const unsigned i_year = cddb_disc_get_year( p_disc );
 416         if( i_year > 0 )
 417         {
 418             psz_year = psz_year_buffer;
 419             snprintf( psz_year_buffer, sizeof(psz_year_buffer), "%u", i_year );
 420         }
 421
 422         /* Set artist only if unique */
 423         for( int i = 0; i < i_titles; i++ )
 424         {
 425             cddb_track_t *t = cddb_disc_get_track( p_disc, i );
 426             if( !t )
 427                 continue;
 428             const char *psz_track_artist = cddb_track_get_artist( t );
 429             if( psz_artist && psz_track_artist &&
 430                 strcmp( psz_artist, psz_track_artist ) )
 431             {
 432                 psz_artist = NULL;
 433                 break;
 434             }
 435             psz_artist = psz_track_artist;
 436         }
 437     }
 438 #endif
 439
 440     /* CD-Text */
 441     vlc_meta_t **pp_cd_text;
 442     int        i_cd_text;
 443
 444     if( ioctl_GetCdText( VLC_OBJECT(p_access), p_sys->vcddev, &pp_cd_text, &i_cd_text ) )
 445     {
 446         msg_Dbg( p_access, "CD-TEXT information missing" );
 447         i_cd_text = 0;
 448         pp_cd_text = NULL;
 449     }
 450
 451     /* Retrieve CD-TEXT informations but prefer CDDB */
 452     if( i_cd_text > 0 && pp_cd_text[0] )
 453     {
 454         const vlc_meta_t *p_disc = pp_cd_text[0];
 455         ON_EMPTY( psz_album,       vlc_meta_Get( p_disc, vlc_meta_Album ) );
 456         ON_EMPTY( psz_genre,       vlc_meta_Get( p_disc, vlc_meta_Genre ) );
 457         ON_EMPTY( psz_artist,      vlc_meta_Get( p_disc, vlc_meta_Artist ) );
 458         ON_EMPTY( psz_description, vlc_meta_Get( p_disc, vlc_meta_Description ) );
 459     }
 460
 461     if( NONEMPTY( psz_album ) )
 462     {
 463         input_item_SetName( p_current, psz_album );
 464         input_item_SetAlbum( p_current, psz_album );
 465     }
 466
 467     if( NONEMPTY( psz_genre ) )
 468         input_item_SetGenre( p_current, psz_genre );
 469
 470     if( NONEMPTY( psz_artist ) )
 471         input_item_SetArtist( p_current, psz_artist );
 472
 473     if( NONEMPTY( psz_year ) )
 474         input_item_SetDate( p_current, psz_year );
 475
 476     if( NONEMPTY( psz_description ) )
 477         input_item_SetDescription( p_current, psz_description );
 478
 479     const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i_titles] - p_sys->p_sectors[0] ) *
 480                                CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
 481     input_item_SetDuration( p_current, i_duration );
 482
 483     input_item_node_t *p_root = input_item_node_Create( p_current );
 484
 485     /* Build title table */
 486     for( int i = 0; i < i_titles; i++ )
 487     {
 488         input_item_t *p_input_item;
 489
 490         char *psz_uri, *psz_opt, *psz_first, *psz_last;
 491         char *psz_name;
 492
 493         msg_Dbg( p_access, "track[%d] start=%d", i, p_sys->p_sectors[i] );
 494
 495         /* */
 496         if( asprintf( &psz_uri, "cdda://%s", p_access->psz_location ) == -1 )
 497             psz_uri = NULL;
 498         if( asprintf( &psz_opt, "cdda-track=%i", i+1 ) == -1 )
 499             psz_opt = NULL;
 500         if( asprintf( &psz_first, "cdda-first-sector=%i",p_sys->p_sectors[i] ) == -1 )
 501             psz_first = NULL;
 502         if( asprintf( &psz_last, "cdda-last-sector=%i", p_sys->p_sectors[i+1] ) == -1 )
 503             psz_last = NULL;
 504
 505         /* Define a "default name" */
 506         if( asprintf( &psz_name, _("Audio CD - Track %02i"), (i+1) ) == -1 )
 507             psz_name = NULL;
 508
 509         /* Create playlist items */
 510         const mtime_t i_duration = (int64_t)( p_sys->p_sectors[i+1] - p_sys->p_sectors[i] ) *
 511                                    CDDA_DATA_SIZE * 1000000 / 44100 / 2 / 2;
 512         p_input_item = input_item_NewWithType( VLC_OBJECT( p_access ),
 513                                               psz_uri, psz_name, 0, NULL, 0, i_duration,
 514                                               ITEM_TYPE_DISC );
 515         input_item_CopyOptions( p_current, p_input_item );
 516         input_item_AddOption( p_input_item, psz_first, VLC_INPUT_OPTION_TRUSTED );
 517         input_item_AddOption( p_input_item, psz_last, VLC_INPUT_OPTION_TRUSTED );
 518         input_item_AddOption( p_input_item, psz_opt, VLC_INPUT_OPTION_TRUSTED );
 519
 520         const char *psz_track_title = NULL;
 521         const char *psz_track_artist = NULL;
 522         const char *psz_track_genre = NULL;
 523         const char *psz_track_description = NULL;
 524
 525 #ifdef HAVE_LIBCDDB
 526         /* Retreive CDDB informations */
 527         if( p_disc )
 528         {
 529             cddb_track_t *t = cddb_disc_get_track( p_disc, i );
 530             if( t != NULL )
 531             {
 532                 psz_track_title = cddb_track_get_title( t );
 533                 psz_track_artist = cddb_track_get_artist( t );
 534             }
 535         }
 536 #endif
 537
 538         /* Retreive CD-TEXT informations but prefer CDDB */
 539         if( i+1 < i_cd_text && pp_cd_text[i+1] )
 540         {
 541             const vlc_meta_t *t = pp_cd_text[i+1];
 542
 543             ON_EMPTY( psz_track_title,       vlc_meta_Get( t, vlc_meta_Title ) );
 544             ON_EMPTY( psz_track_artist,      vlc_meta_Get( t, vlc_meta_Artist ) );
 545             ON_EMPTY( psz_track_genre,       vlc_meta_Get( t, vlc_meta_Genre ) );
 546             ON_EMPTY( psz_track_description, vlc_meta_Get( t, vlc_meta_Description ) );
 547         }
 548
 549         /* */
 550         ON_EMPTY( psz_track_artist,       psz_artist );
 551         ON_EMPTY( psz_track_genre,        psz_genre );
 552         ON_EMPTY( psz_track_description,  psz_description );
 553
 554         /* */
 555         if( NONEMPTY( psz_track_title ) )
 556         {
 557             input_item_SetName( p_input_item, psz_track_title );
 558             input_item_SetTitle( p_input_item, psz_track_title );
 559         }
 560
 561         if( NONEMPTY( psz_track_artist ) )
 562             input_item_SetArtist( p_input_item, psz_track_artist );
 563
 564         if( NONEMPTY( psz_track_genre ) )
 565             input_item_SetGenre( p_input_item, psz_track_genre );
 566
 567         if( NONEMPTY( psz_track_description ) )
 568             input_item_SetDescription( p_input_item, psz_track_description );
 569
 570         if( NONEMPTY( psz_album ) )
 571             input_item_SetAlbum( p_input_item, psz_album );
 572
 573         if( NONEMPTY( psz_year ) )
 574             input_item_SetDate( p_input_item, psz_year );
 575
 576         char psz_num[3+1];
 577         snprintf( psz_num, sizeof(psz_num), "%d", 1+i );
 578         input_item_SetTrackNum( p_input_item, psz_num );
 579
 580         input_item_node_AppendItem( p_root, p_input_item );
 581         vlc_gc_decref( p_input_item );
 582         free( psz_uri ); free( psz_opt ); free( psz_name );
 583         free( psz_first ); free( psz_last );
 584     }
 585 #undef ON_EMPTY
 586 #undef NONEMPTY
 587
 588     input_item_node_PostAndDelete( p_root );
 589
 590     /* */
 591     for( int i = 0; i < i_cd_text; i++ )
 592     {
 593         vlc_meta_t *p_meta = pp_cd_text[i];
 594         if( !p_meta )
 595             continue;
 596         vlc_meta_Delete( p_meta );
 597     }
 598     free( pp_cd_text );
 599
 600 #ifdef HAVE_LIBCDDB
 601     if( p_disc )
 602         cddb_disc_destroy( p_disc );
 603 #endif
 604     return VLC_SUCCESS;
 605 }
 606
 607 #ifdef HAVE_LIBCDDB
 608 static cddb_disc_t *GetCDDBInfo( access_t *p_access, int i_titles, int *p_sectors )
 609 {
 610     if( var_CreateGetInteger( p_access, "album-art" ) == ALBUM_ART_WHEN_ASKED )
 611         return NULL;
 612
 613     /* */
 614     cddb_conn_t *p_cddb = cddb_new();
 615     if( !p_cddb )
 616     {
 617         msg_Warn( p_access, "unable to use CDDB" );
 618         return NULL;
 619     }
 620
 621     /* */
 622     char *psz_tmp = var_InheritString( p_access, "cddb-server" );
 623     if( psz_tmp )
 624     {
 625         cddb_set_server_name( p_cddb, psz_tmp );
 626         free( psz_tmp );
 627     }
 628
 629     cddb_set_server_port( p_cddb, var_InheritInteger( p_access, "cddb-port" ) );
 630
 631     cddb_set_email_address( p_cddb, "vlc@videolan.org" );
 632
 633     /// \todo
 634     cddb_cache_disable( p_cddb );
 635
 636 //    cddb_cache_set_dir( p_cddb,
 637 //                     var_InheritString( p_access,
 638 //                                    MODULE_STRING "-cddb-cachedir") );
 639
 640     cddb_set_timeout( p_cddb, 10 );
 641
 642     /// \todo
 643     cddb_http_disable( p_cddb );
 644
 645     /* */
 646     cddb_disc_t *p_disc = cddb_disc_new();
 647     if( !p_disc )
 648     {
 649         msg_Err( p_access, "unable to create CDDB disc structure." );
 650         goto error;
 651     }
 652
 653     int64_t i_length = 0;
 654     for( int i = 0; i < i_titles; i++ )
 655     {
 656         cddb_track_t *t = cddb_track_new();
 657         cddb_track_set_frame_offset( t, p_sectors[i] );
 658         cddb_disc_add_track( p_disc, t );
 659         const int64_t i_size = ( p_sectors[i+1] - p_sectors[i] ) *
 660                                (int64_t)CDDA_DATA_SIZE;
 661         i_length += INT64_C(1000000) * i_size / 44100 / 4  ;
 662     }
 663
 664     cddb_disc_set_length( p_disc, (int)(i_length/1000000) );
 665
 666     if( !cddb_disc_calc_discid( p_disc ) )
 667     {
 668         msg_Err( p_access, "CDDB disc ID calculation failed" );
 669         goto error;
 670     }
 671
 672     const int i_matches = cddb_query( p_cddb, p_disc );
 673     if( i_matches < 0 )
 674     {
 675         msg_Warn( p_access, "CDDB error: %s", cddb_error_str(errno) );
 676         goto error;
 677     }
 678     else if( i_matches == 0 )
 679     {
 680         msg_Dbg( p_access, "Couldn't find any matches in CDDB." );
 681         goto error;
 682     }
 683     else if( i_matches > 1 )
 684         msg_Warn( p_access, "found %d matches in CDDB. Using first one.", i_matches );
 685
 686     cddb_read( p_cddb, p_disc );
 687
 688     cddb_destroy( p_cddb);
 689     return p_disc;
 690
 691 error:
 692     if( p_disc )
 693         cddb_disc_destroy( p_disc );
 694     cddb_destroy( p_cddb );
 695     return NULL;
 696 }
 697 #endif /*HAVE_LIBCDDB*/
 698