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