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