1 /*****************************************************************************
2 * media_list_path.h : Some inlined function that allows media_list_path
3 * manipulation. This is internal and used only by media_list_player.
4 *****************************************************************************
5 * Copyright (C) 2005 the VideoLAN team
8 * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 #ifndef _LIBVLC_MEDIA_LIST_PATH_H
26 #define _LIBVLC_MEDIA_LIST_PATH_H 1
28 /**************************************************************************
29 * path_empty (Media List Player Internal)
30 **************************************************************************/
31 static inline libvlc_media_list_path_t libvlc_media_list_path_empty( void )
33 libvlc_media_list_path_t ret = malloc(sizeof(int));
38 /**************************************************************************
39 * path_with_root_index (Media List Player Internal)
40 **************************************************************************/
41 static inline libvlc_media_list_path_t libvlc_media_list_path_with_root_index( int index )
43 libvlc_media_list_path_t ret = malloc(sizeof(int)*2);
49 /**************************************************************************
50 * path_deepness (Media List Player Internal)
51 **************************************************************************/
52 static inline int libvlc_media_list_path_deepness( libvlc_media_list_path_t path )
55 for( i = 0; path[i] != -1; i++ );
59 /**************************************************************************
60 * path_append (Media List Player Internal)
61 **************************************************************************/
62 static inline void libvlc_media_list_path_append( libvlc_media_list_path_t * p_path, int index )
64 libvlc_media_list_path_t *p_tmp;
65 int old_deepness = libvlc_media_list_path_deepness( *p_path );
66 *p_tmp = realloc( *p_path, sizeof(int)*(old_deepness+2));
70 *p_path[old_deepness] = index;
71 *p_path[old_deepness+1] = -1;
75 /**************************************************************************
76 * path_copy_by_appending (Media List Player Internal)
77 **************************************************************************/
78 static inline libvlc_media_list_path_t libvlc_media_list_path_copy_by_appending( libvlc_media_list_path_t path, int index )
80 libvlc_media_list_path_t ret;
81 int old_deepness = libvlc_media_list_path_deepness( path );
82 ret = malloc( sizeof(int)*(old_deepness+2) );
83 memcpy( ret, path, sizeof(int)*(old_deepness+2) );
84 ret[old_deepness] = index;
85 ret[old_deepness+1] = -1;
89 /**************************************************************************
90 * path_copy (Media List Player Internal)
91 **************************************************************************/
92 static inline libvlc_media_list_path_t libvlc_media_list_path_copy( libvlc_media_list_path_t path )
94 libvlc_media_list_path_t ret;
95 int deepness = libvlc_media_list_path_deepness( path );
96 ret = malloc( sizeof(int)*(deepness+1) );
97 memcpy( ret, path, sizeof(int)*(deepness+1) );
101 /**************************************************************************
102 * get_path_rec (Media List Player Internal)
103 **************************************************************************/
104 static libvlc_media_list_path_t
105 get_path_rec( libvlc_media_list_path_t path, libvlc_media_list_t * p_current_mlist, libvlc_media_t * p_searched_md )
108 count = libvlc_media_list_count( p_current_mlist, NULL );
109 for( i = 0; i < count; i++ )
111 libvlc_media_t * p_md = libvlc_media_list_item_at_index( p_current_mlist, i, NULL );
113 if( p_md == p_searched_md )
114 return libvlc_media_list_path_copy_by_appending( path, i ); /* Found! */
116 libvlc_media_list_t * p_subitems = libvlc_media_subitems( p_md, NULL );
117 libvlc_media_release( p_md );
120 libvlc_media_list_path_t new_path = libvlc_media_list_path_copy_by_appending( path, i );
121 libvlc_media_list_lock( p_subitems );
122 libvlc_media_list_path_t ret = get_path_rec( new_path, p_subitems, p_searched_md );
123 libvlc_media_list_unlock( p_subitems );
125 libvlc_media_list_release( p_subitems );
127 return ret; /* Found in sublist! */
133 /**************************************************************************
134 * path_of_item (Media List Player Internal)
135 **************************************************************************/
136 static inline libvlc_media_list_path_t libvlc_media_list_path_of_item( libvlc_media_list_t * p_mlist, libvlc_media_t * p_md )
138 libvlc_media_list_path_t path = libvlc_media_list_path_empty();
139 libvlc_media_list_path_t ret;
140 ret = get_path_rec( path, p_mlist, p_md );
145 /**************************************************************************
146 * item_at_path (Media List Player Internal)
147 **************************************************************************/
148 static libvlc_media_t *
149 libvlc_media_list_item_at_path( libvlc_media_list_t * p_mlist, libvlc_media_list_path_t path )
151 libvlc_media_list_t * p_current_mlist = p_mlist;
152 libvlc_media_t * p_md = NULL;
154 for( i = 0; path[i] != -1; i++ )
156 p_md = libvlc_media_list_item_at_index( p_current_mlist, path[i], NULL );
158 if( p_current_mlist != p_mlist )
159 libvlc_media_list_release( p_current_mlist );
161 if( path[i+1] == -1 )
164 p_current_mlist = libvlc_media_subitems( p_md, NULL );
165 libvlc_media_release( p_md );
167 if( !p_current_mlist )
172 /* Not found, shouldn't happen if the p_path is not empty */
173 if( p_current_mlist != p_mlist )
174 libvlc_media_list_release( p_current_mlist );
178 /**************************************************************************
179 * parentlist_at_path (Media List Player Internal)
180 **************************************************************************/
181 static libvlc_media_list_t *
182 libvlc_media_list_parentlist_at_path( libvlc_media_list_t * p_mlist, libvlc_media_list_path_t path )
184 libvlc_media_list_t * p_current_mlist = p_mlist;
185 libvlc_media_t * p_md = NULL;
187 for( i = 0; path[i] != -1; i++ )
189 if( p_current_mlist != p_mlist )
190 libvlc_media_list_release( p_current_mlist );
192 if( path[i+1] == -1 )
193 return p_current_mlist;
195 p_md = libvlc_media_list_item_at_index( p_current_mlist, path[i], NULL );
197 p_current_mlist = libvlc_media_subitems( p_md, NULL );
198 libvlc_media_release( p_md );
200 if( !p_current_mlist )
205 /* Not found, shouldn't happen if the p_path is not empty */
206 if( p_current_mlist != p_mlist )
207 libvlc_media_list_release( p_current_mlist );
211 /**************************************************************************
212 * sublist_at_path (Media List Player Internal)
213 **************************************************************************/
214 static libvlc_media_list_t *
215 libvlc_media_list_sublist_at_path( libvlc_media_list_t * p_mlist, libvlc_media_list_path_t path )
217 libvlc_media_list_t * ret;
218 libvlc_media_t * p_md = libvlc_media_list_item_at_path( p_mlist, path );
222 ret = libvlc_media_subitems( p_md, NULL );
223 libvlc_media_release( p_md );