git.sesse.net Git - vlc/blob - src/playlist/thread.c

   1 /*****************************************************************************
   2  * playlist.c : Playlist management functions
   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 #include <vlc/vlc.h>
  25 #include <vlc_es.h>
  26 #include <vlc_input.h>
  27 #include "vlc_playlist.h"
  28 #include "vlc_interaction.h"
  29 #include "playlist_internal.h"
  30
  31 /*****************************************************************************
  32  * Local prototypes
  33  *****************************************************************************/
  34 static void RunControlThread ( playlist_t * );
  35 static void RunPreparse( playlist_preparse_t * );
  36
  37 static playlist_t * CreatePlaylist( vlc_object_t *p_parent );
  38 static void HandlePlaylist( playlist_t * );
  39 static void EndPlaylist( playlist_t * );
  40 static void DestroyPlaylist( playlist_t * );
  41
  42 static void HandleStats( playlist_t *, int );
  43
  44 static void HandleInteraction( playlist_t * );
  45 static void DestroyInteraction( playlist_t * );
  46
  47 /*****************************************************************************
  48  * Main functions for the global thread
  49  *****************************************************************************/
  50
  51 /**
  52  * Create the main playlist thread
  53  * Additionally to the playlist, this thread controls :
  54  *    - Interaction
  55  *    - Statistics
  56  *    - VLM
  57  * \param p_parent
  58  * \return an object with a started thread
  59  */
  60 playlist_t * __playlist_ThreadCreate( vlc_object_t *p_parent )
  61 {
  62     playlist_t *p_playlist;
  63     p_playlist = CreatePlaylist( p_parent );
  64
  65     if( !p_playlist ) return NULL;
  66
  67     // Stats
  68     p_playlist->p_stats = (global_stats_t *)malloc( sizeof( global_stats_t ) );
  69     vlc_mutex_init( p_playlist, &p_playlist->p_stats->lock );
  70
  71     // Interaction
  72     p_playlist->p_interaction = NULL;
  73
  74     // Preparse
  75     p_playlist->p_preparse = vlc_object_create( p_playlist,
  76                                   sizeof( playlist_preparse_t ) );
  77     if( !p_playlist->p_preparse )
  78     {
  79         msg_Err( p_playlist, "unable to create preparser" );
  80         vlc_object_destroy( p_playlist );
  81         return NULL;
  82     }
  83     p_playlist->p_preparse->i_waiting = 0;
  84     p_playlist->p_preparse->pp_waiting = NULL;
  85
  86     vlc_object_attach( p_playlist->p_preparse, p_playlist );
  87     if( vlc_thread_create( p_playlist->p_preparse, "preparser",
  88                            RunPreparse, VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
  89     {
  90         msg_Err( p_playlist, "cannot spawn preparse thread" );
  91         vlc_object_detach( p_playlist->p_preparse );
  92         vlc_object_destroy( p_playlist->p_preparse );
  93         return NULL;
  94     }
  95
  96     // Start the thread
  97     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
  98                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
  99     {
 100         msg_Err( p_playlist, "cannot spawn playlist thread" );
 101         vlc_object_destroy( p_playlist );
 102         return NULL;
 103     }
 104
 105     /* The object has been initialized, now attach it */
 106     vlc_object_attach( p_playlist, p_parent );
 107
 108     return p_playlist;
 109 }
 110
 111 /**
 112  * Destroy the playlist global thread.
 113  *
 114  * Deinits all things controlled by the playlist global thread
 115  * \param p_playlist the playlist thread to destroy
 116  * \return VLC_SUCCESS or an error
 117  */
 118 int playlist_ThreadDestroy( playlist_t * p_playlist )
 119 {
 120     p_playlist->b_die = 1;
 121
 122     DestroyInteraction( p_playlist );
 123     DestroyPlaylist( p_playlist );
 124
 125     return VLC_SUCCESS;
 126 }
 127
 128 /**
 129  * Run the main control thread itself
 130  */
 131 static void RunControlThread ( playlist_t *p_playlist )
 132 {
 133    int i_loops = 0;
 134
 135    /* Tell above that we're ready */
 136    vlc_thread_ready( p_playlist );
 137
 138     while( !p_playlist->b_die )
 139     {
 140         i_loops++;
 141
 142         HandleInteraction( p_playlist );
 143         HandleStats( p_playlist, i_loops );
 144
 145         HandlePlaylist( p_playlist );
 146
 147         msleep( INTF_IDLE_SLEEP / 2 );
 148
 149         /* Stop sleeping earlier if we have work */
 150         /* TODO : statistics about this */
 151         if ( p_playlist->request.b_request &&
 152                         p_playlist->status.i_status == PLAYLIST_RUNNING )
 153         {
 154             continue;
 155         }
 156
 157         msleep( INTF_IDLE_SLEEP / 2 );
 158     }
 159
 160     EndPlaylist( p_playlist );
 161 }
 162
 163
 164 /*****************************************************************************
 165  * Playlist-specific functions
 166  *****************************************************************************/
 167 static playlist_t * CreatePlaylist( vlc_object_t *p_parent )
 168 {
 169     return playlist_Create( p_parent );
 170 }
 171
 172 static void DestroyPlaylist( playlist_t *p_playlist )
 173 {
 174     playlist_Destroy( p_playlist );
 175 }
 176
 177 static void HandlePlaylist( playlist_t *p_playlist )
 178 {
 179     playlist_MainLoop( p_playlist );
 180 }
 181
 182 static void EndPlaylist( playlist_t *p_playlist )
 183 {
 184     playlist_LastLoop( p_playlist );
 185 }
 186
 187 /*****************************************************************************
 188  * Preparse-specific functions
 189  *****************************************************************************/
 190 static void RunPreparse ( playlist_preparse_t *p_obj )
 191 {
 192     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 193     /* Tell above that we're ready */
 194     vlc_thread_ready( p_obj );
 195
 196     while( !p_playlist->b_die )
 197     {
 198         playlist_PreparseLoop(  p_obj );
 199         if( p_obj->i_waiting == 0 )
 200         {
 201             msleep( INTF_IDLE_SLEEP );
 202         }
 203     }
 204 }
 205
 206 /*****************************************************************************
 207  * Interaction functions
 208  *****************************************************************************/
 209 static void DestroyInteraction( playlist_t *p_playlist )
 210 {
 211     if( p_playlist->p_interaction )
 212     {
 213         intf_InteractionDestroy( p_playlist->p_interaction );
 214     }
 215 }
 216
 217 static void HandleInteraction( playlist_t *p_playlist )
 218 {
 219     if( p_playlist->p_interaction )
 220     {
 221         stats_TimerStart( p_playlist, "Interaction thread",
 222                           STATS_TIMER_INTERACTION );
 223         intf_InteractionManage( p_playlist );
 224         stats_TimerStop( p_playlist, STATS_TIMER_INTERACTION );
 225     }
 226 }
 227
 228
 229 /*****************************************************************************
 230  * Stats functions
 231  *****************************************************************************/
 232 static void HandleStats( playlist_t *p_playlist, int i_loops )
 233 {
 234     if( i_loops %5 == 0 && p_playlist->p_stats )
 235     {
 236         stats_ComputeGlobalStats( p_playlist, p_playlist->p_stats );
 237         if( p_playlist->p_input )
 238         {
 239             stats_ComputeInputStats( p_playlist->p_input,
 240                                 p_playlist->p_input->input.p_item->p_stats );
 241         }
 242     }
 243 }