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 static vlc_mutex_t global_lock = VLC_STATIC_MUTEX;
  43
  44 #undef pl_Hold
  45 playlist_t *pl_Hold (vlc_object_t *obj)
  46 {
  47     playlist_t *pl;
  48     libvlc_int_t *p_libvlc = obj->p_libvlc;
  49
  50     vlc_mutex_lock (&global_lock);
  51     pl = libvlc_priv (p_libvlc)->p_playlist;
  52     assert (pl != NULL);
  53
  54     if (!libvlc_priv (p_libvlc)->playlist_active)
  55     {
  56          playlist_Activate (pl);
  57          libvlc_priv (p_libvlc)->playlist_active = true;
  58     }
  59
  60     /* The playlist should hold itself with vlc_object_hold() if ever. */
  61     assert (VLC_OBJECT (pl) != obj);
  62     if (pl)
  63         vlc_object_hold (pl);
  64     vlc_mutex_unlock (&global_lock);
  65     return pl;
  66 }
  67
  68 #undef pl_Release
  69 void pl_Release( vlc_object_t *p_this )
  70 {
  71     playlist_t *pl = libvlc_priv (p_this->p_libvlc)->p_playlist;
  72     assert( pl != NULL );
  73
  74     /* The rule is that pl_Release() should act on
  75        the same object than pl_Hold() */
  76     assert( VLC_OBJECT(pl) != p_this);
  77
  78     vlc_object_release( pl );
  79 }
  80
  81 void pl_Deactivate (libvlc_int_t *p_libvlc)
  82 {
  83     bool deactivate;
  84
  85     vlc_mutex_lock (&global_lock);
  86     deactivate = libvlc_priv (p_libvlc)->playlist_active;
  87     vlc_mutex_unlock (&global_lock);
  88
  89     if (deactivate)
  90         playlist_Deactivate (libvlc_priv (p_libvlc)->p_playlist);
  91 }
  92
  93 void playlist_Lock( playlist_t *pl )
  94 {
  95     vlc_mutex_lock( &pl_priv(pl)->lock );
  96 }
  97
  98 void playlist_Unlock( playlist_t *pl )
  99 {
 100     vlc_mutex_unlock( &pl_priv(pl)->lock );
 101 }
 102
 103 void playlist_AssertLocked( playlist_t *pl )
 104 {
 105     vlc_assert_locked( &pl_priv(pl)->lock );
 106 }
 107
 108 int playlist_Control( playlist_t * p_playlist, int i_query,
 109                       bool b_locked, ... )
 110 {
 111     va_list args;
 112     int i_result;
 113     PL_LOCK_IF( !b_locked );
 114     va_start( args, b_locked );
 115     i_result = PlaylistVAControl( p_playlist, i_query, args );
 116     va_end( args );
 117     PL_UNLOCK_IF( !b_locked );
 118
 119     return i_result;
 120 }
 121
 122 static int PlaylistVAControl( playlist_t * p_playlist, int i_query, va_list args )
 123 {
 124     playlist_item_t *p_item, *p_node;
 125
 126     PL_ASSERT_LOCKED;
 127
 128     if( !vlc_object_alive( p_playlist ) )
 129         return VLC_EGENERIC;
 130
 131     if( playlist_IsEmpty( p_playlist ) && i_query != PLAYLIST_STOP )
 132         return VLC_EGENERIC;
 133
 134     switch( i_query )
 135     {
 136     case PLAYLIST_STOP:
 137         pl_priv(p_playlist)->request.i_status = PLAYLIST_STOPPED;
 138         pl_priv(p_playlist)->request.b_request = true;
 139         pl_priv(p_playlist)->request.p_item = NULL;
 140         break;
 141
 142     // Node can be null, it will keep the same. Use with care ...
 143     // Item null = take the first child of node
 144     case PLAYLIST_VIEWPLAY:
 145         p_node = (playlist_item_t *)va_arg( args, playlist_item_t * );
 146         p_item = (playlist_item_t *)va_arg( args, playlist_item_t * );
 147         if ( p_node == NULL )
 148         {
 149             p_node = get_current_status_node( p_playlist );
 150             assert( p_node );
 151         }
 152         pl_priv(p_playlist)->request.i_status = PLAYLIST_RUNNING;
 153         pl_priv(p_playlist)->request.i_skip = 0;
 154         pl_priv(p_playlist)->request.b_request = true;
 155         pl_priv(p_playlist)->request.p_node = p_node;
 156         pl_priv(p_playlist)->request.p_item = p_item;
 157         if( p_item && var_GetBool( p_playlist, "random" ) )
 158             pl_priv(p_playlist)->b_reset_currently_playing = true;
 159         break;
 160
 161     case PLAYLIST_PLAY:
 162         if( pl_priv(p_playlist)->p_input )
 163         {
 164             var_SetInteger( pl_priv(p_playlist)->p_input, "state", PLAYING_S );
 165             break;
 166         }
 167         else
 168         {
 169             pl_priv(p_playlist)->request.i_status = PLAYLIST_RUNNING;
 170             pl_priv(p_playlist)->request.b_request = true;
 171             pl_priv(p_playlist)->request.p_node = get_current_status_node( p_playlist );
 172             pl_priv(p_playlist)->request.p_item = get_current_status_item( p_playlist );
 173             pl_priv(p_playlist)->request.i_skip = 0;
 174         }
 175         break;
 176
 177     case PLAYLIST_PAUSE:
 178         if( !pl_priv(p_playlist)->p_input )
 179         {    /* FIXME: is this really useful without input? */
 180              pl_priv(p_playlist)->status.i_status = PLAYLIST_PAUSED;
 181              break;
 182         }
 183
 184         if( var_GetInteger( pl_priv(p_playlist)->p_input, "state" ) == PAUSE_S )
 185         {
 186             pl_priv(p_playlist)->status.i_status = PLAYLIST_RUNNING;
 187             var_SetInteger( pl_priv(p_playlist)->p_input, "state", PLAYING_S );
 188         }
 189         else
 190         {
 191             pl_priv(p_playlist)->status.i_status = PLAYLIST_PAUSED;
 192             var_SetInteger( pl_priv(p_playlist)->p_input, "state", PAUSE_S );
 193         }
 194         break;
 195
 196     case PLAYLIST_SKIP:
 197         pl_priv(p_playlist)->request.p_node = get_current_status_node( p_playlist );
 198         pl_priv(p_playlist)->request.p_item = get_current_status_item( p_playlist );
 199         pl_priv(p_playlist)->request.i_skip = (int) va_arg( args, int );
 200         /* if already running, keep running */
 201         if( pl_priv(p_playlist)->status.i_status != PLAYLIST_STOPPED )
 202             pl_priv(p_playlist)->request.i_status = pl_priv(p_playlist)->status.i_status;
 203         pl_priv(p_playlist)->request.b_request = true;
 204         break;
 205
 206     default:
 207         msg_Err( p_playlist, "unknown playlist query" );
 208         return VLC_EBADVAR;
 209     }
 210     vlc_cond_signal( &pl_priv(p_playlist)->signal );
 211
 212     return VLC_SUCCESS;
 213 }
 214
 215 /*****************************************************************************
 216  * Preparse control
 217  *****************************************************************************/
 218 /** Enqueue an item for preparsing */
 219 int playlist_PreparseEnqueue( playlist_t *p_playlist,
 220                               input_item_t *p_item, bool b_locked )
 221 {
 222     playlist_private_t *p_sys = pl_priv(p_playlist);
 223
 224     PL_LOCK_IF( !b_locked );
 225     if( p_sys->p_preparser )
 226         playlist_preparser_Push( p_sys->p_preparser, p_item );
 227     PL_UNLOCK_IF( !b_locked );
 228
 229     return VLC_SUCCESS;
 230 }
 231
 232 int playlist_AskForArtEnqueue( playlist_t *p_playlist,
 233                                input_item_t *p_item, bool b_locked )
 234 {
 235     playlist_private_t *p_sys = pl_priv(p_playlist);
 236
 237     PL_LOCK_IF( !b_locked );
 238     if( p_sys->p_fetcher )
 239         playlist_fetcher_Push( p_sys->p_fetcher, p_item );
 240     PL_UNLOCK_IF( !b_locked );
 241
 242     return VLC_SUCCESS;
 243 }
 244