a3f87c61eafff68e70f7c2dee5b51de6d0f403c7
[vlc.git] / src / playlist / control.c
1 /*****************************************************************************
2  * control.c : Handle control of the playlist & running through it
3  *****************************************************************************
4  * Copyright (C) 1999-2004 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Samuel Hocevar <sam@zoy.org>
8  *          ClĂ©ment Stenac <zorglub@videolan.org>
9  *
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.
14  *
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.
19  *
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  *****************************************************************************/
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
27
28 #include <vlc_common.h>
29 #include "vlc_playlist.h"
30 #include "playlist_internal.h"
31 #include <assert.h>
32
33 /*****************************************************************************
34  * Local prototypes
35  *****************************************************************************/
36 static int PlaylistVAControl( playlist_t * p_playlist, int i_query, va_list args );
37
38 /*****************************************************************************
39  * Playlist control
40  *****************************************************************************/
41
42 playlist_t *__pl_Hold( vlc_object_t *p_this )
43 {
44     playlist_t *pl;
45
46     barrier();
47     pl = libvlc_priv (p_this->p_libvlc)->p_playlist;
48
49     assert( VLC_OBJECT(pl) != p_this /* This does not make sense to hold the playlist
50     using pl_Hold. use vlc_object_hold in this case */ );
51
52     if (pl)
53         vlc_object_hold (pl);
54     return pl;
55 }
56
57 void __pl_Release( vlc_object_t *p_this )
58 {
59     playlist_t *pl = libvlc_priv (p_this->p_libvlc)->p_playlist;
60     assert( pl != NULL );
61
62     /* The rule is that pl_Release() should act on
63        the same object than pl_Hold() */
64     assert( VLC_OBJECT(pl) != p_this);
65
66     vlc_object_release( pl );
67 }
68
69 int playlist_Control( playlist_t * p_playlist, int i_query,
70                       bool b_locked, ... )
71 {
72     va_list args;
73     int i_result;
74     PL_LOCK_IF( !b_locked );
75     va_start( args, b_locked );
76     i_result = PlaylistVAControl( p_playlist, i_query, args );
77     va_end( args );
78     PL_UNLOCK_IF( !b_locked );
79
80     return i_result;
81 }
82
83 static int PlaylistVAControl( playlist_t * p_playlist, int i_query, va_list args )
84 {
85     playlist_item_t *p_item, *p_node;
86     vlc_value_t val;
87
88     PL_ASSERT_LOCKED;
89
90     if( !vlc_object_alive( p_playlist ) )
91         return VLC_EGENERIC;
92
93     if( playlist_IsEmpty( p_playlist ) )
94         return VLC_EGENERIC;
95
96     switch( i_query )
97     {
98     case PLAYLIST_STOP:
99         pl_priv(p_playlist)->request.i_status = PLAYLIST_STOPPED;
100         pl_priv(p_playlist)->request.b_request = true;
101         pl_priv(p_playlist)->request.p_item = NULL;
102         break;
103
104     // Node can be null, it will keep the same. Use with care ...
105     // Item null = take the first child of node
106     case PLAYLIST_VIEWPLAY:
107         p_node = (playlist_item_t *)va_arg( args, playlist_item_t * );
108         p_item = (playlist_item_t *)va_arg( args, playlist_item_t * );
109         if ( p_node == NULL )
110         {
111             p_node = get_current_status_node( p_playlist );
112             assert( p_node );
113         }
114         pl_priv(p_playlist)->request.i_status = PLAYLIST_RUNNING;
115         pl_priv(p_playlist)->request.i_skip = 0;
116         pl_priv(p_playlist)->request.b_request = true;
117         pl_priv(p_playlist)->request.p_node = p_node;
118         pl_priv(p_playlist)->request.p_item = p_item;
119         if( p_item && var_GetBool( p_playlist, "random" ) )
120             pl_priv(p_playlist)->b_reset_currently_playing = true;
121         break;
122
123     case PLAYLIST_PLAY:
124         if( pl_priv(p_playlist)->p_input )
125         {
126             val.i_int = PLAYING_S;
127             var_Set( pl_priv(p_playlist)->p_input, "state", val );
128             break;
129         }
130         else
131         {
132             pl_priv(p_playlist)->request.i_status = PLAYLIST_RUNNING;
133             pl_priv(p_playlist)->request.b_request = true;
134             pl_priv(p_playlist)->request.p_node = get_current_status_node( p_playlist );
135             pl_priv(p_playlist)->request.p_item = get_current_status_item( p_playlist );
136             pl_priv(p_playlist)->request.i_skip = 0;
137         }
138         break;
139
140     case PLAYLIST_PAUSE:
141         val.i_int = 0;
142         if( pl_priv(p_playlist)->p_input )
143             var_Get( pl_priv(p_playlist)->p_input, "state", &val );
144
145         if( val.i_int == PAUSE_S )
146         {
147             pl_priv(p_playlist)->status.i_status = PLAYLIST_RUNNING;
148             if( pl_priv(p_playlist)->p_input )
149             {
150                 val.i_int = PLAYING_S;
151                 var_Set( pl_priv(p_playlist)->p_input, "state", val );
152             }
153         }
154         else
155         {
156             pl_priv(p_playlist)->status.i_status = PLAYLIST_PAUSED;
157             if( pl_priv(p_playlist)->p_input )
158             {
159                 val.i_int = PAUSE_S;
160                 var_Set( pl_priv(p_playlist)->p_input, "state", val );
161             }
162         }
163         break;
164
165     case PLAYLIST_SKIP:
166         pl_priv(p_playlist)->request.p_node = get_current_status_node( p_playlist );
167         pl_priv(p_playlist)->request.p_item = get_current_status_item( p_playlist );
168         pl_priv(p_playlist)->request.i_skip = (int) va_arg( args, int );
169         /* if already running, keep running */
170         if( pl_priv(p_playlist)->status.i_status != PLAYLIST_STOPPED )
171             pl_priv(p_playlist)->request.i_status = pl_priv(p_playlist)->status.i_status;
172         pl_priv(p_playlist)->request.b_request = true;
173         break;
174
175     default:
176         msg_Err( p_playlist, "unknown playlist query" );
177         return VLC_EBADVAR;
178     }
179     vlc_cond_signal( &pl_priv(p_playlist)->signal );
180
181     return VLC_SUCCESS;
182 }
183
184 /*****************************************************************************
185  * Preparse control
186  *****************************************************************************/
187 /** Enqueue an item for preparsing */
188 int playlist_PreparseEnqueue( playlist_t *p_playlist,
189                               input_item_t *p_item, bool b_locked )
190 {
191     playlist_private_t *p_sys = pl_priv(p_playlist);
192
193     PL_LOCK_IF( !b_locked );
194     if( p_sys->p_preparser )
195         playlist_preparser_Push( p_sys->p_preparser, p_item );
196     PL_UNLOCK_IF( !b_locked );
197
198     return VLC_SUCCESS;
199 }
200
201 int playlist_AskForArtEnqueue( playlist_t *p_playlist,
202                                input_item_t *p_item, bool b_locked )
203 {
204     playlist_private_t *p_sys = pl_priv(p_playlist);
205
206     PL_LOCK_IF( !b_locked );
207     if( p_sys->p_fetcher )
208         playlist_fetcher_Push( p_sys->p_fetcher, p_item );
209     PL_UNLOCK_IF( !b_locked );
210
211     return VLC_SUCCESS;
212 }
213