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  * $Id$
   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/input.h>
  29 #include <vlc/vout.h>
  30 #include <vlc/sout.h>
  31
  32 #include "vlc_playlist.h"
  33
  34 /**
  35  * Sort the playlist
  36  * \param p_playlist the playlist
  37  * \param i_mode: SORT_ID, SORT_TITLE, SORT_GROUP, SORT_AUTHOR, SORT_RANDOM
  38  * \param i_type: ORDER_NORMAL or ORDER_REVERSE (reversed order)
  39  * \return VLC_SUCCESS on success
  40  */
  41 int playlist_Sort( playlist_t * p_playlist , int i_mode, int i_type )
  42 {
  43     int i , i_small , i_position;
  44     playlist_item_t *p_temp;
  45     vlc_value_t val;
  46     val.b_bool = VLC_TRUE;
  47
  48     vlc_mutex_lock( &p_playlist->object_lock );
  49
  50     p_playlist->i_sort = i_mode;
  51     p_playlist->i_order = i_type;
  52     /* playlist with one or less items are allways sorted in all
  53        manners, quit fast. */
  54     if( p_playlist->i_size <= 1 )
  55     {
  56         vlc_mutex_unlock( &p_playlist->object_lock );
  57
  58         /* Notify the interfaces, is this necessary? */
  59         var_Set( p_playlist, "intf-change", val );
  60
  61         return VLC_SUCCESS;
  62     }
  63
  64     if( i_mode == SORT_RANDOM )
  65     {
  66         for( i_position = 0; i_position < p_playlist->i_size ; i_position ++ )
  67         {
  68             int i_new  = rand() % (p_playlist->i_size - 1);
  69
  70             /* Keep the correct current index */
  71             if( i_new == p_playlist->i_index )
  72                 p_playlist->i_index = i_position;
  73             else if( i_position == p_playlist->i_index )
  74                 p_playlist->i_index = i_new;
  75
  76             p_temp = p_playlist->pp_items[i_position];
  77             p_playlist->pp_items[i_position] = p_playlist->pp_items[i_new];
  78             p_playlist->pp_items[i_new] = p_temp;
  79         }
  80         vlc_mutex_unlock( &p_playlist->object_lock );
  81
  82         /* Notify the interfaces */
  83         var_Set( p_playlist, "intf-change", val );
  84
  85         return VLC_SUCCESS;
  86     }
  87
  88     for( i_position = 0; i_position < p_playlist->i_size -1 ; i_position ++ )
  89     {
  90         i_small  = i_position;
  91         for( i = i_position + 1 ; i<  p_playlist->i_size ; i++)
  92         {
  93             int i_test = 0;
  94
  95             if( i_mode == SORT_ID )
  96             {
  97                 i_test = p_playlist->pp_items[i]->i_id -
  98                                  p_playlist->pp_items[i_small]->i_id;
  99             }
 100             else if( i_mode == SORT_TITLE )
 101             {
 102                 i_test = strcasecmp( p_playlist->pp_items[i]->input.psz_name,
 103                              p_playlist->pp_items[i_small]->input.psz_name );
 104             }
 105             else if( i_mode == SORT_GROUP )
 106             {
 107                 i_test = p_playlist->pp_items[i]->i_group -
 108                              p_playlist->pp_items[i_small]->i_group;
 109             }
 110             else if( i_mode == SORT_DURATION )
 111             {
 112                 i_test = p_playlist->pp_items[i]->input.i_duration -
 113                              p_playlist->pp_items[i_small]->input.i_duration;
 114             }
 115             else if( i_mode == SORT_AUTHOR )
 116             {
 117                  i_test = strcasecmp(
 118                           playlist_GetInfo( p_playlist, i,
 119                                             _("General") , _("Author") ),
 120                           playlist_GetInfo( p_playlist, i_small,
 121                                             _("General") , _("Author") ) );
 122             }
 123
 124             if( ( i_type == ORDER_NORMAL  && i_test < 0 ) ||
 125                 ( i_type == ORDER_REVERSE && i_test > 0 ) )
 126             {
 127                 i_small = i;
 128             }
 129         }
 130         /* Keep the correct current index */
 131         if( i_small == p_playlist->i_index )
 132             p_playlist->i_index = i_position;
 133         else if( i_position == p_playlist->i_index )
 134             p_playlist->i_index = i_small;
 135
 136         p_temp = p_playlist->pp_items[i_position];
 137         p_playlist->pp_items[i_position] = p_playlist->pp_items[i_small];
 138         p_playlist->pp_items[i_small] = p_temp;
 139     }
 140     vlc_mutex_unlock( &p_playlist->object_lock );
 141
 142     /* Notify the interfaces  */
 143     var_Set( p_playlist, "intf-change", val );
 144
 145     return VLC_SUCCESS;
 146 }