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 1.8 2004/01/10 23:44:19 hartman 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_ID, SORT_TITLE, SORT_GROUP, SORT_AUTHOR, SORT_RANDOM
  37  * \param i_type: ORDER_NORMAL or ORDER_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     p_playlist->i_sort = i_mode;
  50     p_playlist->i_order = i_type;
  51
  52     if( i_mode == SORT_RANDOM )
  53     {
  54         for( i_position = 0; i_position < p_playlist->i_size ; i_position ++ )
  55         {
  56             int i_new  = rand() % (p_playlist->i_size - 1);
  57
  58             /* Keep the correct current index */
  59             if( i_new == p_playlist->i_index )
  60                 p_playlist->i_index = i_position;
  61             else if( i_position == p_playlist->i_index )
  62                 p_playlist->i_index = i_new;
  63
  64             p_temp = p_playlist->pp_items[i_position];
  65             p_playlist->pp_items[i_position] = p_playlist->pp_items[i_new];
  66             p_playlist->pp_items[i_new] = p_temp;
  67         }
  68         vlc_mutex_unlock( &p_playlist->object_lock );
  69
  70         /* Notify the interfaces */
  71         var_Set( p_playlist, "intf-change", val );
  72
  73         return 0;
  74     }
  75
  76     for( i_position = 0; i_position < p_playlist->i_size -1 ; i_position ++ )
  77     {
  78         i_small  = i_position;
  79         for( i = i_position + 1 ; i<  p_playlist->i_size ; i++)
  80         {
  81             int i_test = 0;
  82
  83             if( i_mode == SORT_ID )
  84             {
  85                 i_test = p_playlist->pp_items[i]->i_id -
  86                                  p_playlist->pp_items[i_small]->i_id;
  87             }
  88             else if( i_mode == SORT_TITLE )
  89             {
  90                 i_test = strcasecmp( p_playlist->pp_items[i]->psz_name,
  91                                  p_playlist->pp_items[i_small]->psz_name );
  92             }
  93             else if( i_mode == SORT_GROUP )
  94             {
  95                 i_test = p_playlist->pp_items[i]->i_group -
  96                                  p_playlist->pp_items[i_small]->i_group;
  97             }
  98             else if( i_mode == SORT_AUTHOR )
  99             {
 100                  i_test = strcasecmp(
 101                           playlist_GetInfo( p_playlist, i,
 102                                             _("General") , _("Author") ),
 103                           playlist_GetInfo( p_playlist, i_small,
 104                                             _("General") , _("Author") ) );
 105             }
 106
 107             if( ( i_type == ORDER_NORMAL  && i_test < 0 ) ||
 108                 ( i_type == ORDER_REVERSE && i_test > 0 ) )
 109             {
 110                 i_small = i;
 111             }
 112         }
 113         /* Keep the correct current index */
 114         if( i_small == p_playlist->i_index )
 115             p_playlist->i_index = i_position;
 116         else if( i_position == p_playlist->i_index )
 117             p_playlist->i_index = i_small;
 118
 119         p_temp = p_playlist->pp_items[i_position];
 120         p_playlist->pp_items[i_position] = p_playlist->pp_items[i_small];
 121         p_playlist->pp_items[i_small] = p_temp;
 122     }
 123     vlc_mutex_unlock( &p_playlist->object_lock );
 124
 125     /* Notify the interfaces  */
 126     var_Set( p_playlist, "intf-change", val );
 127
 128     return 0;
 129 }