git.sesse.net Git - vlc/blob - 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  *          Clément 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_object_signal_unlocked( p_playlist );
 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 )
 190 {
 191     playlist_private_t *p_sys = pl_priv(p_playlist);
 192
 193     playlist_preparser_Push( p_sys->p_preparser, p_item );
 194
 195     return VLC_SUCCESS;
 196 }
 197
 198 int playlist_AskForArtEnqueue( playlist_t *p_playlist,
 199                                input_item_t *p_item )
 200 {
 201     playlist_private_t *p_sys = pl_priv(p_playlist);
 202
 203     playlist_fetcher_Push( p_sys->p_fetcher, p_item );
 204
 205     return VLC_SUCCESS;
 206 }
 207