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 int playlist_ItemArraySort( playlist_t *p_playlist, int i_items,
  36                 playlist_item_t **pp_items, int i_mode,
  37                 int i_type );
  38
  39
  40 /**
  41  * Sort the playlist.
  42  * \param p_playlist the playlist
  43  * \param i_mode: SORT_ID, SORT_TITLE, SORT_AUTHOR, SORT_RANDOM
  44  * \param i_type: ORDER_NORMAL or ORDER_REVERSE (reversed order)
  45  * \return VLC_SUCCESS on success
  46  */
  47 int playlist_Sort( playlist_t * p_playlist , int i_mode, int i_type )
  48 {
  49     int  i_id = -1;
  50     vlc_value_t val;
  51     val.b_bool = VLC_TRUE;
  52
  53     vlc_mutex_lock( &p_playlist->object_lock );
  54
  55     p_playlist->i_sort = i_mode;
  56     p_playlist->i_order = i_type;
  57
  58     if( p_playlist->i_index >= 0 )
  59     {
  60         i_id = p_playlist->pp_items[p_playlist->i_index]->input.i_id;
  61     }
  62
  63     playlist_ItemArraySort( p_playlist, p_playlist->i_size,
  64                     p_playlist->pp_items, i_mode, i_type );
  65
  66     if( i_id != -1 )
  67     {
  68         p_playlist->i_index = playlist_GetPositionById( p_playlist, i_id );
  69     }
  70
  71     /* ensure we are in no-view mode */
  72     p_playlist->status.i_view = -1;
  73
  74     vlc_mutex_unlock( &p_playlist->object_lock );
  75
  76     /* Notify the interfaces */
  77     var_Set( p_playlist, "intf-change", val );
  78
  79     return VLC_SUCCESS;
  80 }
  81
  82 /**
  83  * Sort a node.
  84  * \param p_playlist the playlist
  85  * \param p_node the node to sort
  86  * \param i_mode: SORT_ID, SORT_TITLE, SORT_AUTHOR, SORT_RANDOM
  87  * \param i_type: ORDER_NORMAL or ORDER_REVERSE (reversed order)
  88  * \return VLC_SUCCESS on success
  89  */
  90 int playlist_NodeSort( playlist_t * p_playlist , playlist_item_t *p_node,
  91                        int i_mode, int i_type )
  92 {
  93     vlc_value_t val;
  94     val.b_bool = VLC_TRUE;
  95
  96     vlc_mutex_lock( &p_playlist->object_lock );
  97
  98     playlist_ItemArraySort( p_playlist,p_node->i_children,
  99                             p_node->pp_children, i_mode, i_type );
 100
 101     p_node->i_serial++;
 102
 103     vlc_mutex_unlock( &p_playlist->object_lock );
 104
 105     /* Notify the interfaces */
 106     var_Set( p_playlist, "intf-change", val );
 107
 108     return VLC_SUCCESS;
 109 }
 110
 111
 112 int playlist_ItemArraySort( playlist_t *p_playlist, int i_items,
 113                 playlist_item_t **pp_items, int i_mode,
 114                 int i_type )
 115 {
 116     int i , i_small , i_position;
 117     playlist_item_t *p_temp;
 118     vlc_value_t val;
 119     val.b_bool = VLC_TRUE;
 120
 121     if( i_mode == SORT_RANDOM )
 122     {
 123         for( i_position = 0; i_position < i_items ; i_position ++ )
 124         {
 125             int i_new  = rand() % (i_items - 1);
 126
 127             p_temp = pp_items[i_position];
 128             pp_items[i_position] = pp_items[i_new];
 129             pp_items[i_new] = p_temp;
 130         }
 131
 132         return VLC_SUCCESS;
 133     }
 134
 135     for( i_position = 0; i_position < i_items -1 ; i_position ++ )
 136     {
 137         i_small  = i_position;
 138         for( i = i_position + 1 ; i< i_items ; i++)
 139         {
 140             int i_test = 0;
 141
 142             if( i_mode == SORT_TITLE )
 143             {
 144                 i_test = strcasecmp( pp_items[i]->input.psz_name,
 145                                          pp_items[i_small]->input.psz_name );
 146             }
 147             else if( i_mode == SORT_DURATION )
 148             {
 149                 i_test = pp_items[i]->input.i_duration -
 150                              pp_items[i_small]->input.i_duration;
 151             }
 152             else if( i_mode == SORT_AUTHOR )
 153             {
 154                 msg_Err( p_playlist,"META SORT not implemented" );
 155             }
 156
 157             if( ( i_type == ORDER_NORMAL  && i_test < 0 ) ||
 158                 ( i_type == ORDER_REVERSE && i_test > 0 ) )
 159             {
 160                 i_small = i;
 161             }
 162         }
 163         p_temp = pp_items[i_position];
 164         pp_items[i_position] = pp_items[i_small];
 165         pp_items[i_small] = p_temp;
 166     }
 167     return VLC_SUCCESS;
 168 }
 169
 170
 171 int playlist_NodeGroup( playlist_t * p_playlist , int i_view,
 172                         playlist_item_t *p_root,
 173                         playlist_item_t **pp_items,int i_item,
 174                         int i_mode, int i_type )
 175 {
 176     char *psz_search = NULL;
 177     int i_nodes = 0;
 178     playlist_item_t **pp_nodes = NULL;
 179     playlist_item_t *p_node;
 180     vlc_bool_t b_found;
 181     int i,j;
 182     for( i = 0; i< i_item ; i++ )
 183     {
 184         if( psz_search ) free( psz_search );
 185         if( i_mode == SORT_TITLE )
 186         {
 187             psz_search = strdup( pp_items[i]->input.psz_name );
 188         }
 189         else if ( i_mode == SORT_AUTHOR )
 190         {
 191             psz_search = playlist_ItemGetInfo( pp_items[i],
 192                             _("Meta-information"), _( "Artist" ) );
 193         }
 194
 195         if( psz_search && !strcmp( psz_search, "" ) )
 196         {
 197             free( psz_search );
 198             psz_search = strdup( _("Undefined") );
 199         }
 200
 201         b_found = VLC_FALSE;
 202         for( j = 0 ; j< i_nodes; j++ )
 203         {
 204            if( !strcasecmp( psz_search, pp_nodes[j]->input.psz_name ) )
 205            {
 206                 playlist_NodeAppend( p_playlist, i_view,
 207                                      pp_items[i], pp_nodes[j] );
 208                 b_found = VLC_TRUE;
 209                 break;
 210            }
 211         }
 212         if( !b_found )
 213         {
 214             p_node = playlist_NodeCreate( p_playlist, i_view,psz_search,
 215                                           NULL );
 216             INSERT_ELEM( pp_nodes, i_nodes, i_nodes, p_node );
 217             playlist_NodeAppend( p_playlist, i_view,
 218                                  pp_items[i],p_node );
 219         }
 220     }
 221
 222     /* Now, sort the nodes by name */
 223     playlist_ItemArraySort( p_playlist, i_nodes, pp_nodes, SORT_TITLE,
 224                             i_type );
 225
 226     /* Now, sort each node and append it to the root node*/
 227     for( i = 0 ; i< i_nodes ; i++ )
 228     {
 229         playlist_ItemArraySort( p_playlist, pp_nodes[i]->i_children,
 230                                 pp_nodes[i]->pp_children, SORT_TITLE, i_type );
 231
 232         playlist_NodeAppend( p_playlist, i_view,
 233                              pp_nodes[i], p_root );
 234     }
 235     return VLC_SUCCESS;
 236 }