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[vlc] / 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_common.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         return VLC_ENOMEM;
54     p_export->psz_filename = NULL;
55     if ( psz_filename )
56         p_export->psz_filename = strdup( psz_filename );
57     p_export->p_file = utf8_fopen( psz_filename, "wt" );
58     if( !p_export->p_file )
59     {
60         msg_Err( p_playlist , "could not create playlist file %s (%m)",
61                  psz_filename );
62         return VLC_EGENERIC;
63     }
64
65     p_export->p_root = p_export_root;
66
67     /* Lock the playlist */
68     vlc_object_lock( p_playlist );
69     p_playlist->p_private = (void *)p_export;
70
71     /* And call the module ! All work is done now */
72     p_module = module_Need( p_playlist, "playlist export", psz_type, true);
73     if( !p_module )
74     {
75         msg_Warn( p_playlist, "exporting playlist failed" );
76         vlc_object_unlock( p_playlist );
77         return VLC_ENOOBJ;
78     }
79     module_Unneed( p_playlist , p_module );
80
81     /* Clean up */
82     fclose( p_export->p_file );
83     free( p_export->psz_filename );
84     free ( p_export );
85     p_playlist->p_private = NULL;
86     vlc_object_unlock( p_playlist );
87
88     return VLC_SUCCESS;
89 }
90
91 /*****************************************************************************
92  * A subitem has been added to the Media Library (Event Callback)
93  *****************************************************************************/
94 static void input_item_subitem_added( const vlc_event_t * p_event,
95                                       void * user_data )
96 {
97     playlist_t *p_playlist = user_data;
98     input_item_t *p_item = p_event->u.input_item_subitem_added.p_new_child;
99
100     /* playlist_AddInput() can fail, but we have no way to report that ..
101      * Any way when it has failed, either the playlist is dying, either OOM */
102     playlist_AddInput( p_playlist, p_item, PLAYLIST_APPEND, PLAYLIST_END,
103             false, false );
104 }
105
106 int playlist_MLLoad( playlist_t *p_playlist )
107 {
108     char *psz_datadir = config_GetUserDataDir();
109     char *psz_uri = NULL;
110     input_item_t *p_input;
111
112     if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
113     if( !psz_datadir ) /* XXX: This should never happen */
114     {
115         msg_Err( p_playlist, "no data directory, cannot load media library") ;
116         return VLC_EGENERIC;
117     }
118
119     if( asprintf( &psz_uri, "%s" DIR_SEP "ml.xspf", psz_datadir ) == -1 )
120     {
121         psz_uri = NULL;
122         goto error;
123     }
124     struct stat p_stat;
125     /* checks if media library file is present */
126     if( utf8_stat( psz_uri , &p_stat ) )
127         goto error;
128     free( psz_uri );
129
130     /* FIXME: WTF? stat() should never be used right before open()! */
131     if( asprintf( &psz_uri, "file/xspf-open://%s" DIR_SEP "ml.xspf",
132                   psz_datadir ) == -1 )
133     {
134         psz_uri = NULL;
135         goto error;
136     }
137     free( psz_datadir );
138     psz_datadir = NULL;
139
140     const char *const psz_option = "meta-file";
141     /* that option has to be cleaned in input_item_subitem_added() */
142     /* vlc_gc_decref() in the same function */
143     p_input = input_ItemNewExt( p_playlist, psz_uri,
144                                 _("Media Library"), 1, &psz_option, -1 );
145     if( p_input == NULL )
146         goto error;
147
148     PL_LOCK;
149     if( p_playlist->p_ml_onelevel->p_input )
150         vlc_gc_decref( p_playlist->p_ml_onelevel->p_input );
151     if( p_playlist->p_ml_category->p_input )
152         vlc_gc_decref( p_playlist->p_ml_category->p_input );
153
154     p_playlist->p_ml_onelevel->p_input =
155     p_playlist->p_ml_category->p_input = p_input;
156     /* We save the input at two different place, incref */
157     vlc_gc_incref( p_input );
158     vlc_gc_incref( p_input );
159
160     vlc_event_attach( &p_input->event_manager, vlc_InputItemSubItemAdded,
161                         input_item_subitem_added, p_playlist );
162
163     p_playlist->b_doing_ml = true;
164     PL_UNLOCK;
165
166     stats_TimerStart( p_playlist, "ML Load", STATS_TIMER_ML_LOAD );
167     input_Read( p_playlist, p_input, true );
168     stats_TimerStop( p_playlist,STATS_TIMER_ML_LOAD );
169
170     PL_LOCK;
171     p_playlist->b_doing_ml = false;
172     PL_UNLOCK;
173
174     vlc_event_detach( &p_input->event_manager, vlc_InputItemSubItemAdded,
175                         input_item_subitem_added, p_playlist );
176
177     vlc_gc_decref( p_input );
178     free( psz_uri );
179     return VLC_SUCCESS;
180
181 error:
182     free( psz_uri );
183     free( psz_datadir );
184     return VLC_ENOMEM;
185 }
186
187 int playlist_MLDump( playlist_t *p_playlist )
188 {
189     char *psz_datadir = config_GetUserDataDir();
190     if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
191     if( !psz_datadir ) /* XXX: This should never happen */
192     {
193         msg_Err( p_playlist, "no data directory, cannot save media library") ;
194         return VLC_EGENERIC;
195     }
196
197     char psz_dirname[ strlen( psz_datadir ) + sizeof( DIR_SEP "ml.xspf")];
198     strcpy( psz_dirname, psz_datadir );
199     free( psz_datadir );
200     if( config_CreateDir( (vlc_object_t *)p_playlist, psz_dirname ) )
201     {
202         return VLC_EGENERIC;
203     }
204
205     strcat( psz_dirname, DIR_SEP "ml.xspf" );
206
207     stats_TimerStart( p_playlist, "ML Dump", STATS_TIMER_ML_DUMP );
208     playlist_Export( p_playlist, psz_dirname, p_playlist->p_ml_category,
209                      "export-xspf" );
210     stats_TimerStop( p_playlist, STATS_TIMER_ML_DUMP );
211
212     return VLC_SUCCESS;
213 }