cd27f1c2d6ad1bf01c990648307dea15da415351
[vlc.git] / src / playlist / loadsave.c
1 /*****************************************************************************
2  * loadsave.c : Playlist loading / saving functions
3  *****************************************************************************
4  * Copyright (C) 1999-2004 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Samuel Hocevar <sam@zoy.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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23 #ifdef HAVE_CONFIG_H
24 # include "config.h"
25 #endif
26
27 #include <vlc/vlc.h>
28 #include <vlc_playlist.h>
29 #include <vlc_events.h>
30 #include "playlist_internal.h"
31 #include "config/configuration.h"
32 #include <vlc_charset.h>
33
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <unistd.h>
37 #include <errno.h>
38
39 int playlist_Export( playlist_t * p_playlist, const char *psz_filename ,
40                      playlist_item_t *p_export_root,const char *psz_type )
41 {
42     module_t *p_module;
43     playlist_export_t *p_export;
44
45     if( p_export_root == NULL ) return VLC_EGENERIC;
46
47     msg_Info( p_playlist, "saving %s to file %s",
48                     p_export_root->p_input->psz_name, psz_filename );
49
50     /* Prepare the playlist_export_t structure */
51     p_export = (playlist_export_t *)malloc( sizeof(playlist_export_t) );
52     if( !p_export)
53     {
54         msg_Err( p_playlist, "out of memory" );
55         return VLC_ENOMEM;
56     }
57     p_export->psz_filename = NULL;
58     if ( psz_filename )
59         p_export->psz_filename = strdup( psz_filename );
60     p_export->p_file = utf8_fopen( psz_filename, "wt" );
61     if( !p_export->p_file )
62     {
63         msg_Err( p_playlist , "could not create playlist file %s (%m)",
64                  psz_filename );
65         return VLC_EGENERIC;
66     }
67
68     p_export->p_root = p_export_root;
69
70     /* Lock the playlist */
71     vlc_mutex_lock( &p_playlist->object_lock );
72     p_playlist->p_private = (void *)p_export;
73
74     /* And call the module ! All work is done now */
75     p_module = module_Need( p_playlist, "playlist export", psz_type, VLC_TRUE);
76     if( !p_module )
77     {
78         msg_Warn( p_playlist, "exporting playlist failed" );
79         vlc_mutex_unlock( &p_playlist->object_lock );
80         return VLC_ENOOBJ;
81     }
82     module_Unneed( p_playlist , p_module );
83
84     /* Clean up */
85     fclose( p_export->p_file );
86     if ( p_export->psz_filename )
87         free( p_export->psz_filename );
88     free ( p_export );
89     p_playlist->p_private = NULL;
90     vlc_mutex_unlock( &p_playlist->object_lock );
91
92     return VLC_SUCCESS;
93 }
94
95 /*****************************************************************************
96  * A subitem has been added to the Media Library (Event Callback)
97  *****************************************************************************/
98 static void input_item_subitem_added( const vlc_event_t * p_event,
99                                       void * user_data )
100 {
101     playlist_t *p_playlist = user_data;
102     input_item_t *p_item = p_event->u.input_item_subitem_added.p_new_child;
103
104     /* playlist_AddInput() can fail, but we have no way to report that ..
105      * Any way when it has failed, either the playlist is dying, either OOM */
106     playlist_AddInput( p_playlist, p_item, PLAYLIST_APPEND, PLAYLIST_END,
107             VLC_FALSE, VLC_FALSE );
108 }
109
110 int playlist_MLLoad( playlist_t *p_playlist )
111 {
112     const char *psz_datadir = p_playlist->p_libvlc->psz_datadir;
113     char *psz_uri = NULL;
114     input_item_t *p_input;
115
116     if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
117     if( !psz_datadir ) /* XXX: This should never happen */
118     {
119         msg_Err( p_playlist, "no data directory, cannot load media library") ;
120         return VLC_EGENERIC;
121     }
122
123     if( asprintf( &psz_uri, "%s" DIR_SEP "ml.xspf", psz_datadir ) == -1 )
124     {
125         psz_uri = NULL;
126         goto error;
127     }
128     struct stat p_stat;
129     /* checks if media library file is present */
130     if( utf8_stat( psz_uri , &p_stat ) )
131     {
132         free( psz_uri );
133         return VLC_EGENERIC;
134     }
135     free( psz_uri );
136
137     if( asprintf( &psz_uri, "file/xspf-open://%s" DIR_SEP "ml.xspf",
138                   psz_datadir ) == -1 )
139     {
140         psz_uri = NULL;
141         goto error;
142     }
143
144     const char *const psz_option = "meta-file";
145     /* that option has to be cleaned in input_item_subitem_added() */
146     /* vlc_gc_decref() in the same function */
147     p_input = input_ItemNewExt( p_playlist, psz_uri,
148                                 _("Media Library"), 1, &psz_option, -1 );
149     if( p_input == NULL )
150         goto error;
151
152     PL_LOCK;
153     if( p_playlist->p_ml_onelevel->p_input )
154         vlc_gc_decref( p_playlist->p_ml_onelevel->p_input );
155     if( p_playlist->p_ml_category->p_input )
156         vlc_gc_decref( p_playlist->p_ml_category->p_input );
157
158     p_playlist->p_ml_onelevel->p_input =
159     p_playlist->p_ml_category->p_input = p_input;
160     /* We save the input at two different place, incref */
161     vlc_gc_incref( p_input );
162     vlc_gc_incref( p_input );
163
164     vlc_event_attach( &p_input->event_manager, vlc_InputItemSubItemAdded,
165                         input_item_subitem_added, p_playlist );
166
167     p_playlist->b_doing_ml = VLC_TRUE;
168     PL_UNLOCK;
169
170     stats_TimerStart( p_playlist, "ML Load", STATS_TIMER_ML_LOAD );
171     input_Read( p_playlist, p_input, VLC_TRUE );
172     stats_TimerStop( p_playlist,STATS_TIMER_ML_LOAD );
173
174     PL_LOCK;
175     p_playlist->b_doing_ml = VLC_FALSE;
176     PL_UNLOCK;
177
178     vlc_event_detach( &p_input->event_manager, vlc_InputItemSubItemAdded,
179                         input_item_subitem_added, p_playlist );
180
181     vlc_gc_decref( p_input );
182     free( psz_uri );
183     return VLC_SUCCESS;
184
185 error:
186     free( psz_uri );
187     return VLC_ENOMEM;
188 }
189
190 int playlist_MLDump( playlist_t *p_playlist )
191 {
192     char *psz_datadir = p_playlist->p_libvlc->psz_datadir;
193     if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
194     if( !psz_datadir ) /* XXX: This should never happen */
195     {
196         msg_Err( p_playlist, "no data directory, cannot save media library") ;
197         return VLC_EGENERIC;
198     }
199
200     char psz_dirname[ strlen( psz_datadir )
201                       + sizeof( DIR_SEP "ml.xspf")];
202     sprintf( psz_dirname, "%s", psz_datadir );
203     if( config_CreateDir( (vlc_object_t *)p_playlist, psz_dirname ) )
204     {
205         return VLC_EGENERIC;
206     }
207
208     strcat( psz_dirname, DIR_SEP "ml.xspf" );
209
210     stats_TimerStart( p_playlist, "ML Dump", STATS_TIMER_ML_DUMP );
211     playlist_Export( p_playlist, psz_dirname, p_playlist->p_ml_category,
212                      "export-xspf" );
213     stats_TimerStop( p_playlist, STATS_TIMER_ML_DUMP );
214
215     return VLC_SUCCESS;
216 }