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 void playlist_Lock( playlist_t *pl )
  70 {
  71     vlc_object_lock( pl );
  72 }
  73
  74 void playlist_Unlock( playlist_t *pl )
  75 {
  76     vlc_object_unlock( pl );
  77 }
  78
  79 void playlist_AssertLocked( playlist_t *pl )
  80 {
  81     vlc_object_assert_locked( pl );
  82 }
  83
  84 int playlist_Control( playlist_t * p_playlist, int i_query,
  85                       bool b_locked, ... )
  86 {
  87     va_list args;
  88     int i_result;
  89     PL_LOCK_IF( !b_locked );
  90     va_start( args, b_locked );
  91     i_result = PlaylistVAControl( p_playlist, i_query, args );
  92     va_end( args );
  93     PL_UNLOCK_IF( !b_locked );
  94
  95     return i_result;
  96 }
  97
  98 static int PlaylistVAControl( playlist_t * p_playlist, int i_query, va_list args )
  99 {
 100     playlist_item_t *p_item, *p_node;
 101     vlc_value_t val;
 102
 103     PL_ASSERT_LOCKED;
 104
 105     if( !vlc_object_alive( p_playlist ) )
 106         return VLC_EGENERIC;
 107
 108     if( playlist_IsEmpty( p_playlist ) )
 109         return VLC_EGENERIC;
 110
 111     switch( i_query )
 112     {
 113     case PLAYLIST_STOP:
 114         pl_priv(p_playlist)->request.i_status = PLAYLIST_STOPPED;
 115         pl_priv(p_playlist)->request.b_request = true;
 116         pl_priv(p_playlist)->request.p_item = NULL;
 117         break;
 118
 119     // Node can be null, it will keep the same. Use with care ...
 120     // Item null = take the first child of node
 121     case PLAYLIST_VIEWPLAY:
 122         p_node = (playlist_item_t *)va_arg( args, playlist_item_t * );
 123         p_item = (playlist_item_t *)va_arg( args, playlist_item_t * );
 124         if ( p_node == NULL )
 125         {
 126             p_node = get_current_status_node( p_playlist );
 127             assert( p_node );
 128         }
 129         pl_priv(p_playlist)->request.i_status = PLAYLIST_RUNNING;
 130         pl_priv(p_playlist)->request.i_skip = 0;
 131         pl_priv(p_playlist)->request.b_request = true;
 132         pl_priv(p_playlist)->request.p_node = p_node;
 133         pl_priv(p_playlist)->request.p_item = p_item;
 134         if( p_item && var_GetBool( p_playlist, "random" ) )
 135             pl_priv(p_playlist)->b_reset_currently_playing = true;
 136         break;
 137
 138     case PLAYLIST_PLAY:
 139         if( pl_priv(p_playlist)->p_input )
 140         {
 141             val.i_int = PLAYING_S;
 142             var_Set( pl_priv(p_playlist)->p_input, "state", val );
 143             break;
 144         }
 145         else
 146         {
 147             pl_priv(p_playlist)->request.i_status = PLAYLIST_RUNNING;
 148             pl_priv(p_playlist)->request.b_request = true;
 149             pl_priv(p_playlist)->request.p_node = get_current_status_node( p_playlist );
 150             pl_priv(p_playlist)->request.p_item = get_current_status_item( p_playlist );
 151             pl_priv(p_playlist)->request.i_skip = 0;
 152         }
 153         break;
 154
 155     case PLAYLIST_PAUSE:
 156         val.i_int = 0;
 157         if( pl_priv(p_playlist)->p_input )
 158             var_Get( pl_priv(p_playlist)->p_input, "state", &val );
 159
 160         if( val.i_int == PAUSE_S )
 161         {
 162             pl_priv(p_playlist)->status.i_status = PLAYLIST_RUNNING;
 163             if( pl_priv(p_playlist)->p_input )
 164             {
 165                 val.i_int = PLAYING_S;
 166                 var_Set( pl_priv(p_playlist)->p_input, "state", val );
 167             }
 168         }
 169         else
 170         {
 171             pl_priv(p_playlist)->status.i_status = PLAYLIST_PAUSED;
 172             if( pl_priv(p_playlist)->p_input )
 173             {
 174                 val.i_int = PAUSE_S;
 175                 var_Set( pl_priv(p_playlist)->p_input, "state", val );
 176             }
 177         }
 178         break;
 179
 180     case PLAYLIST_SKIP:
 181         pl_priv(p_playlist)->request.p_node = get_current_status_node( p_playlist );
 182         pl_priv(p_playlist)->request.p_item = get_current_status_item( p_playlist );
 183         pl_priv(p_playlist)->request.i_skip = (int) va_arg( args, int );
 184         /* if already running, keep running */
 185         if( pl_priv(p_playlist)->status.i_status != PLAYLIST_STOPPED )
 186             pl_priv(p_playlist)->request.i_status = pl_priv(p_playlist)->status.i_status;
 187         pl_priv(p_playlist)->request.b_request = true;
 188         break;
 189
 190     default:
 191         msg_Err( p_playlist, "unknown playlist query" );
 192         return VLC_EBADVAR;
 193     }
 194     vlc_cond_signal( &pl_priv(p_playlist)->signal );
 195
 196     return VLC_SUCCESS;
 197 }
 198
 199 /*****************************************************************************
 200  * Preparse control
 201  *****************************************************************************/
 202 /** Enqueue an item for preparsing */
 203 int playlist_PreparseEnqueue( playlist_t *p_playlist,
 204                               input_item_t *p_item, bool b_locked )
 205 {
 206     playlist_private_t *p_sys = pl_priv(p_playlist);
 207
 208     PL_LOCK_IF( !b_locked );
 209     if( p_sys->p_preparser )
 210         playlist_preparser_Push( p_sys->p_preparser, p_item );
 211     PL_UNLOCK_IF( !b_locked );
 212
 213     return VLC_SUCCESS;
 214 }
 215
 216 int playlist_AskForArtEnqueue( playlist_t *p_playlist,
 217                                input_item_t *p_item, bool b_locked )
 218 {
 219     playlist_private_t *p_sys = pl_priv(p_playlist);
 220
 221     PL_LOCK_IF( !b_locked );
 222     if( p_sys->p_fetcher )
 223         playlist_fetcher_Push( p_sys->p_fetcher, p_item );
 224     PL_UNLOCK_IF( !b_locked );
 225
 226     return VLC_SUCCESS;
 227 }
 228