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     int i_id;
  94     vlc_value_t val;
  95     val.b_bool = VLC_TRUE;
  96
  97     vlc_mutex_lock( &p_playlist->object_lock );
  98
  99     playlist_ItemArraySort( p_playlist,p_node->i_children,
 100                             p_node->pp_children, i_mode, i_type );
 101
 102     p_node->i_serial++;
 103
 104     vlc_mutex_unlock( &p_playlist->object_lock );
 105
 106     /* Notify the interfaces */
 107     var_Set( p_playlist, "intf-change", val );
 108
 109     return VLC_SUCCESS;
 110 }
 111
 112
 113 int playlist_ItemArraySort( playlist_t *p_playlist, int i_items,
 114                 playlist_item_t **pp_items, int i_mode,
 115                 int i_type )
 116 {
 117     int i , i_small , i_position;
 118     playlist_item_t *p_temp;
 119     vlc_value_t val;
 120     val.b_bool = VLC_TRUE;
 121
 122     if( i_mode == SORT_RANDOM )
 123     {
 124         for( i_position = 0; i_position < i_items ; i_position ++ )
 125         {
 126             int i_new  = rand() % (i_items - 1);
 127
 128             p_temp = pp_items[i_position];
 129             pp_items[i_position] = pp_items[i_new];
 130             pp_items[i_new] = p_temp;
 131         }
 132
 133         return VLC_SUCCESS;
 134     }
 135
 136     for( i_position = 0; i_position < i_items -1 ; i_position ++ )
 137     {
 138         i_small  = i_position;
 139         for( i = i_position + 1 ; i< i_items ; i++)
 140         {
 141             int i_test = 0;
 142
 143             if( i_mode == SORT_TITLE )
 144             {
 145                 i_test = strcasecmp( pp_items[i]->input.psz_name,
 146                                          pp_items[i_small]->input.psz_name );
 147             }
 148             else if( i_mode == SORT_DURATION )
 149             {
 150                 i_test = pp_items[i]->input.i_duration -
 151                              pp_items[i_small]->input.i_duration;
 152             }
 153             else if( i_mode == SORT_AUTHOR )
 154             {
 155                 msg_Err( p_playlist,"META SORT not implemented" );
 156             }
 157
 158             if( ( i_type == ORDER_NORMAL  && i_test < 0 ) ||
 159                 ( i_type == ORDER_REVERSE && i_test > 0 ) )
 160             {
 161                 i_small = i;
 162             }
 163         }
 164         p_temp = pp_items[i_position];
 165         pp_items[i_position] = pp_items[i_small];
 166         pp_items[i_small] = p_temp;
 167     }
 168     return VLC_SUCCESS;
 169 }
 170
 171
 172 int playlist_NodeGroup( playlist_t * p_playlist , int i_view,
 173                         playlist_item_t *p_root,
 174                         playlist_item_t **pp_items,int i_item,
 175                         int i_mode, int i_type )
 176 {
 177     char *psz_search = NULL;
 178     int i_nodes = 0;
 179     playlist_item_t **pp_nodes = NULL;
 180     playlist_item_t *p_node;
 181     vlc_bool_t b_found;
 182     int i,j;
 183     for( i = 0; i< i_item ; i++ )
 184     {
 185         if( psz_search ) free( psz_search );
 186         if( i_mode == SORT_TITLE )
 187         {
 188             psz_search = strdup( pp_items[i]->input.psz_name );
 189         }
 190         else if ( i_mode == SORT_AUTHOR )
 191         {
 192             psz_search = playlist_ItemGetInfo( pp_items[i],
 193                             _("Meta-information"), _( "Artist" ) );
 194         }
 195
 196         if( psz_search && !strcmp( psz_search, "" ) )
 197         {
 198             free( psz_search );
 199             psz_search = strdup( _("Undefined") );
 200         }
 201
 202         b_found = VLC_FALSE;
 203         for( j = 0 ; j< i_nodes; j++ )
 204         {
 205            if( !strcasecmp( psz_search, pp_nodes[j]->input.psz_name ) )
 206            {
 207                 playlist_NodeAppend( p_playlist, i_view,
 208                                      pp_items[i], pp_nodes[j] );
 209                 b_found = VLC_TRUE;
 210                 break;
 211            }
 212         }
 213         if( !b_found )
 214         {
 215             p_node = playlist_NodeCreate( p_playlist, i_view,psz_search,
 216                                           NULL );
 217             INSERT_ELEM( pp_nodes, i_nodes, i_nodes, p_node );
 218             playlist_NodeAppend( p_playlist, i_view,
 219                                  pp_items[i],p_node );
 220         }
 221     }
 222
 223     /* Now, sort the nodes by name */
 224     playlist_ItemArraySort( p_playlist, i_nodes, pp_nodes, SORT_TITLE,
 225                             i_type );
 226
 227     /* Now, sort each node and append it to the root node*/
 228     for( i = 0 ; i< i_nodes ; i++ )
 229     {
 230         playlist_ItemArraySort( p_playlist, pp_nodes[i]->i_children,
 231                                 pp_nodes[i]->pp_children, SORT_TITLE, i_type );
 232
 233         playlist_NodeAppend( p_playlist, i_view,
 234                              pp_nodes[i], p_root );
 235     }
 236     return VLC_SUCCESS;
 237 }