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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_Dbg( 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 = psz_filename ? strdup( psz_filename ) : NULL;
55     p_export->p_file = utf8_fopen( psz_filename, "wt" );
56     if( !p_export->p_file )
57     {
58         msg_Err( p_playlist , "could not create playlist file %s (%m)",
59                  psz_filename );
60         free( p_export->psz_filename );
61         free( p_export );
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     int i_ret;
73     p_module = module_need( p_playlist, "playlist export", psz_type, true);
74     if( !p_module )
75     {
76         msg_Warn( p_playlist, "exporting playlist failed" );
77         i_ret = VLC_ENOOBJ;
78     }
79     else
80     {
81         module_unneed( p_playlist , p_module );
82         i_ret = VLC_SUCCESS;
83     }
84
85     /* Clean up */
86     fclose( p_export->p_file );
87     free( p_export->psz_filename );
88     free( p_export );
89     p_playlist->p_private = NULL;
90     vlc_object_unlock( p_playlist );
91
92     return i_ret;
93 }
94
95 int playlist_Import( playlist_t *p_playlist, const char *psz_file )
96 {
97     input_item_t *p_input;
98     char *psz_uri;
99     const char *const psz_option = "meta-file";
100
101     if( asprintf( &psz_uri, "file/://%s", psz_file ) < 0 )
102         return VLC_EGENERIC;
103
104     p_input = input_item_NewExt( p_playlist, psz_uri, psz_file,
105                                 1, &psz_option, -1 );
106     free( psz_uri );
107
108     playlist_AddInput( p_playlist, p_input, PLAYLIST_APPEND, PLAYLIST_END,
109                        true, false );
110     return input_Read( p_playlist, p_input, true );
111 }
112
113 /*****************************************************************************
114  * A subitem has been added to the Media Library (Event Callback)
115  *****************************************************************************/
116 static void input_item_subitem_added( const vlc_event_t * p_event,
117                                       void * user_data )
118 {
119     playlist_t *p_playlist = user_data;
120     input_item_t *p_item = p_event->u.input_item_subitem_added.p_new_child;
121
122     /* playlist_AddInput() can fail, but we have no way to report that ..
123      * Any way when it has failed, either the playlist is dying, either OOM */
124     playlist_AddInput( p_playlist, p_item, PLAYLIST_APPEND, PLAYLIST_END,
125             false, pl_Unlocked );
126 }
127
128 int playlist_MLLoad( playlist_t *p_playlist )
129 {
130     char *psz_datadir = config_GetUserDataDir();
131     char *psz_uri = NULL;
132     input_item_t *p_input;
133
134     if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
135     if( !psz_datadir ) /* XXX: This should never happen */
136     {
137         msg_Err( p_playlist, "no data directory, cannot load media library") ;
138         return VLC_EGENERIC;
139     }
140
141     if( asprintf( &psz_uri, "%s" DIR_SEP "ml.xspf", psz_datadir ) == -1 )
142     {
143         psz_uri = NULL;
144         goto error;
145     }
146     struct stat p_stat;
147     /* checks if media library file is present */
148     if( utf8_stat( psz_uri , &p_stat ) )
149         goto error;
150     free( psz_uri );
151
152     /* FIXME: WTF? stat() should never be used right before open()! */
153     if( asprintf( &psz_uri, "file/xspf-open://%s" DIR_SEP "ml.xspf",
154                   psz_datadir ) == -1 )
155     {
156         psz_uri = NULL;
157         goto error;
158     }
159     free( psz_datadir );
160     psz_datadir = NULL;
161
162     const char *const psz_option = "meta-file";
163     /* that option has to be cleaned in input_item_subitem_added() */
164     /* vlc_gc_decref() in the same function */
165     p_input = input_item_NewExt( p_playlist, psz_uri,
166                                 _("Media Library"), 1, &psz_option, -1 );
167     if( p_input == NULL )
168         goto error;
169
170     PL_LOCK;
171     if( p_playlist->p_ml_onelevel->p_input )
172         vlc_gc_decref( p_playlist->p_ml_onelevel->p_input );
173     if( p_playlist->p_ml_category->p_input )
174         vlc_gc_decref( p_playlist->p_ml_category->p_input );
175
176     p_playlist->p_ml_onelevel->p_input =
177     p_playlist->p_ml_category->p_input = p_input;
178     /* We save the input at two different place, incref */
179     vlc_gc_incref( p_input );
180     vlc_gc_incref( p_input );
181
182     vlc_event_attach( &p_input->event_manager, vlc_InputItemSubItemAdded,
183                         input_item_subitem_added, p_playlist );
184
185     pl_priv(p_playlist)->b_doing_ml = true;
186     PL_UNLOCK;
187
188     stats_TimerStart( p_playlist, "ML Load", STATS_TIMER_ML_LOAD );
189     input_Read( p_playlist, p_input, true );
190     stats_TimerStop( p_playlist,STATS_TIMER_ML_LOAD );
191
192     PL_LOCK;
193     pl_priv(p_playlist)->b_doing_ml = false;
194     PL_UNLOCK;
195
196     vlc_event_detach( &p_input->event_manager, vlc_InputItemSubItemAdded,
197                         input_item_subitem_added, p_playlist );
198
199     vlc_gc_decref( p_input );
200     free( psz_uri );
201     return VLC_SUCCESS;
202
203 error:
204     free( psz_uri );
205     free( psz_datadir );
206     return VLC_ENOMEM;
207 }
208
209 int playlist_MLDump( playlist_t *p_playlist )
210 {
211     char *psz_datadir = config_GetUserDataDir();
212     if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
213     if( !psz_datadir ) /* XXX: This should never happen */
214     {
215         msg_Err( p_playlist, "no data directory, cannot save media library") ;
216         return VLC_EGENERIC;
217     }
218
219     char psz_dirname[ strlen( psz_datadir ) + sizeof( DIR_SEP "ml.xspf")];
220     strcpy( psz_dirname, psz_datadir );
221     free( psz_datadir );
222     if( config_CreateDir( (vlc_object_t *)p_playlist, psz_dirname ) )
223     {
224         return VLC_EGENERIC;
225     }
226
227     strcat( psz_dirname, DIR_SEP "ml.xspf" );
228
229     stats_TimerStart( p_playlist, "ML Dump", STATS_TIMER_ML_DUMP );
230     playlist_Export( p_playlist, psz_dirname, p_playlist->p_ml_category,
231                      "export-xspf" );
232     stats_TimerStop( p_playlist, STATS_TIMER_ML_DUMP );
233
234     return VLC_SUCCESS;
235 }