git.sesse.net Git - vlc/blob - src/playlist/sort.c

   1 /*****************************************************************************
   2  * sort.c : Playlist sorting functions
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VideoLAN
   5  * $Id: sort.c,v 1.5 2004/01/06 08:50:20 zorglub Exp $
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23 #include <stdlib.h>                                      /* free(), strtol() */
  24 #include <stdio.h>                                              /* sprintf() */
  25 #include <string.h>                                            /* strerror() */
  26
  27 #include <vlc/vlc.h>
  28 #include <vlc/vout.h>
  29 #include <vlc/sout.h>
  30
  31 #include "vlc_playlist.h"
  32
  33 /**
  34  * Sort the playlist
  35  * \param p_playlist the playlist
  36  * \param i_mode: SORT_TITLE, SORT_GROUP, SORT_AUTHOR, SORT_RANDOM
  37  * \param i_type: SORT_NORMAL or SORT_REVERSE (reversed order)
  38  * \return 0 on success
  39  */
  40 int playlist_Sort( playlist_t * p_playlist , int i_mode, int i_type )
  41 {
  42     int i , i_small , i_position;
  43     playlist_item_t *p_temp;
  44     vlc_value_t val;
  45     val.b_bool = VLC_TRUE;
  46
  47     vlc_mutex_lock( &p_playlist->object_lock );
  48
  49     if( i_mode == SORT_RANDOM )
  50     {
  51         for( i_position = 0; i_position < p_playlist->i_size ; i_position ++ )
  52         {
  53             int i_new  = rand() % (p_playlist->i_size - 1);
  54
  55             /* Keep the correct current index */
  56             if( i_new == p_playlist->i_index )
  57                 p_playlist->i_index = i_position;
  58             else if( i_position == p_playlist->i_index )
  59                 p_playlist->i_index = i_new;
  60
  61             p_temp = p_playlist->pp_items[i_position];
  62             p_playlist->pp_items[i_position] = p_playlist->pp_items[i_new];
  63             p_playlist->pp_items[i_new] = p_temp;
  64         }
  65         vlc_mutex_unlock( &p_playlist->object_lock );
  66
  67         /* Notify the interfaces */
  68         var_Set( p_playlist, "intf-change", val );
  69
  70         return 0;
  71     }
  72
  73     for( i_position = 0; i_position < p_playlist->i_size -1 ; i_position ++ )
  74     {
  75         i_small  = i_position;
  76         for( i = i_position + 1 ; i<  p_playlist->i_size ; i++)
  77         {
  78             int i_test = 0;
  79
  80             if( i_mode == SORT_TITLE )
  81             {
  82                 i_test = strcasecmp( p_playlist->pp_items[i]->psz_name,
  83                                  p_playlist->pp_items[i_small]->psz_name );
  84             }
  85             else if( i_mode == SORT_GROUP )
  86             {
  87                 i_test = p_playlist->pp_items[i]->i_group -
  88                                  p_playlist->pp_items[i_small]->i_group;
  89             }
  90             else if( i_mode == SORT_AUTHOR )
  91             {
  92                  i_test = strcasecmp(
  93                           playlist_GetInfo( p_playlist, i,
  94                                             _("General") , _("Author") ),
  95                           playlist_GetInfo( p_playlist, i_small,
  96                                             _("General") , _("Author") ) );
  97             }
  98
  99             if( ( i_type == SORT_NORMAL  && i_test < 0 ) ||
 100                 ( i_type == SORT_REVERSE && i_test > 0 ) )
 101             {
 102                 i_small = i;
 103             }
 104         }
 105         /* Keep the correct current index */
 106         if( i_small == p_playlist->i_index )
 107             p_playlist->i_index = i_position;
 108         else if( i_position == p_playlist->i_index )
 109             p_playlist->i_index = i_small;
 110
 111         p_temp = p_playlist->pp_items[i_position];
 112         p_playlist->pp_items[i_position] = p_playlist->pp_items[i_small];
 113         p_playlist->pp_items[i_small] = p_temp;
 114     }
 115     vlc_mutex_unlock( &p_playlist->object_lock );
 116
 117     /* Notify the interfaces  */
 118     var_Set( p_playlist, "intf-change", val );
 119
 120     return 0;
 121 }