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 static void RunSecondaryPreparse( playlist_secondary_preparse_t * );
  37
  38 static playlist_t * CreatePlaylist( vlc_object_t *p_parent );
  39 static void HandlePlaylist( playlist_t * );
  40 static void EndPlaylist( playlist_t * );
  41 static void DestroyPlaylist( playlist_t * );
  42
  43 static void HandleStats( playlist_t *, int );
  44
  45 static void HandleInteraction( playlist_t * );
  46 static void DestroyInteraction( playlist_t * );
  47
  48 /*****************************************************************************
  49  * Main functions for the global thread
  50  *****************************************************************************/
  51
  52 /**
  53  * Create the main playlist thread
  54  * Additionally to the playlist, this thread controls :
  55  *    - Interaction
  56  *    - Statistics
  57  *    - VLM
  58  * \param p_parent
  59  * \return an object with a started thread
  60  */
  61 void __playlist_ThreadCreate( vlc_object_t *p_parent )
  62 {
  63     playlist_t *p_playlist;
  64     p_playlist = CreatePlaylist( p_parent );
  65
  66     if( !p_playlist ) return;
  67
  68     // Stats
  69     p_playlist->p_stats = (global_stats_t *)malloc( sizeof( global_stats_t ) );
  70     vlc_mutex_init( p_playlist, &p_playlist->p_stats->lock );
  71
  72     // Interaction
  73     p_playlist->p_interaction = NULL;
  74
  75     // Preparse
  76     p_playlist->p_preparse = vlc_object_create( p_playlist,
  77                                   sizeof( playlist_preparse_t ) );
  78     if( !p_playlist->p_preparse )
  79     {
  80         msg_Err( p_playlist, "unable to create preparser" );
  81         vlc_object_destroy( p_playlist );
  82         return;
  83     }
  84     p_playlist->p_preparse->i_waiting = 0;
  85     p_playlist->p_preparse->pp_waiting = NULL;
  86
  87     vlc_object_attach( p_playlist->p_preparse, p_playlist );
  88     if( vlc_thread_create( p_playlist->p_preparse, "preparser",
  89                            RunPreparse, VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
  90     {
  91         msg_Err( p_playlist, "cannot spawn preparse thread" );
  92         vlc_object_detach( p_playlist->p_preparse );
  93         vlc_object_destroy( p_playlist->p_preparse );
  94         return;
  95     }
  96
  97     // Secondary Preparse
  98     p_playlist->p_secondary_preparse = vlc_object_create( p_playlist,
  99                               sizeof( playlist_secondary_preparse_t ) );
 100     if( !p_playlist->p_secondary_preparse )
 101     {
 102         msg_Err( p_playlist, "unable to create secondary preparser" );
 103         vlc_object_destroy( p_playlist );
 104         return;
 105     }
 106     p_playlist->p_secondary_preparse->i_waiting = 0;
 107     p_playlist->p_secondary_preparse->p_waiting = NULL;
 108
 109     vlc_object_attach( p_playlist->p_secondary_preparse, p_playlist );
 110     if( vlc_thread_create( p_playlist->p_secondary_preparse,
 111                            "secondary preparser",
 112                            RunSecondaryPreparse,
 113                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 114     {
 115         msg_Err( p_playlist, "cannot spawn secondary preparse thread" );
 116         vlc_object_detach( p_playlist->p_secondary_preparse );
 117         vlc_object_destroy( p_playlist->p_secondary_preparse );
 118         return;
 119     }
 120
 121     // Start the thread
 122     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
 123                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 124     {
 125         msg_Err( p_playlist, "cannot spawn playlist thread" );
 126         vlc_object_destroy( p_playlist );
 127         return;
 128     }
 129
 130     /* The object has been initialized, now attach it */
 131     vlc_object_attach( p_playlist, p_parent );
 132
 133     return;
 134 }
 135
 136 /**
 137  * Destroy the playlist global thread.
 138  *
 139  * Deinits all things controlled by the playlist global thread
 140  * \param p_playlist the playlist thread to destroy
 141  * \return VLC_SUCCESS or an error
 142  */
 143 int playlist_ThreadDestroy( playlist_t * p_playlist )
 144 {
 145     p_playlist->b_die = 1;
 146
 147     DestroyInteraction( p_playlist );
 148     DestroyPlaylist( p_playlist );
 149
 150     return VLC_SUCCESS;
 151 }
 152
 153 /**
 154  * Run the main control thread itself
 155  */
 156 static void RunControlThread ( playlist_t *p_playlist )
 157 {
 158    int i_loops = 0;
 159
 160    /* Tell above that we're ready */
 161    vlc_thread_ready( p_playlist );
 162
 163     while( !p_playlist->b_die )
 164     {
 165         i_loops++;
 166
 167         HandleInteraction( p_playlist );
 168         HandleStats( p_playlist, i_loops );
 169         HandlePlaylist( p_playlist );
 170
 171         /* 100 ms is an acceptable delay for playlist operations */
 172         msleep( INTF_IDLE_SLEEP*2 );
 173     }
 174
 175     EndPlaylist( p_playlist );
 176 }
 177
 178
 179 /*****************************************************************************
 180  * Playlist-specific functions
 181  *****************************************************************************/
 182 static playlist_t * CreatePlaylist( vlc_object_t *p_parent )
 183 {
 184     return playlist_Create( p_parent );
 185 }
 186
 187 static void DestroyPlaylist( playlist_t *p_playlist )
 188 {
 189     playlist_Destroy( p_playlist );
 190 }
 191
 192 static void HandlePlaylist( playlist_t *p_playlist )
 193 {
 194     playlist_MainLoop( p_playlist );
 195 }
 196
 197 static void EndPlaylist( playlist_t *p_playlist )
 198 {
 199     playlist_LastLoop( p_playlist );
 200 }
 201
 202 /*****************************************************************************
 203  * Preparse-specific functions
 204  *****************************************************************************/
 205 static void RunPreparse ( playlist_preparse_t *p_obj )
 206 {
 207     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 208     /* Tell above that we're ready */
 209     vlc_thread_ready( p_obj );
 210
 211     while( !p_playlist->b_die )
 212     {
 213         playlist_PreparseLoop( p_obj );
 214         if( p_obj->i_waiting == 0 )
 215         {
 216             msleep( INTF_IDLE_SLEEP );
 217         }
 218     }
 219 }
 220
 221 static void RunSecondaryPreparse( playlist_secondary_preparse_t *p_obj )
 222 {
 223     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 224     /* Tell above that we're ready */
 225     vlc_thread_ready( p_obj );
 226
 227     while( !p_playlist->b_die )
 228     {
 229         playlist_SecondaryPreparseLoop( p_obj );
 230         if( p_obj->i_waiting == 0 )
 231         {
 232             msleep( INTF_IDLE_SLEEP );
 233         }
 234     }
 235 }
 236
 237 /*****************************************************************************
 238  * Interaction functions
 239  *****************************************************************************/
 240 static void DestroyInteraction( playlist_t *p_playlist )
 241 {
 242     if( p_playlist->p_interaction )
 243     {
 244         intf_InteractionDestroy( p_playlist->p_interaction );
 245         fprintf( stderr, "NOW NULL ****\n" );
 246         p_playlist->p_interaction = NULL;
 247     }
 248 }
 249
 250 static void HandleInteraction( playlist_t *p_playlist )
 251 {
 252     if( p_playlist->p_interaction )
 253     {
 254         stats_TimerStart( p_playlist, "Interaction thread",
 255                           STATS_TIMER_INTERACTION );
 256         intf_InteractionManage( p_playlist );
 257         stats_TimerStop( p_playlist, STATS_TIMER_INTERACTION );
 258     }
 259 }
 260
 261
 262 /*****************************************************************************
 263  * Stats functions
 264  *****************************************************************************/
 265 static void HandleStats( playlist_t *p_playlist, int i_loops )
 266 {
 267     if( i_loops % 5 == 0 && p_playlist->p_stats )
 268     {
 269         stats_ComputeGlobalStats( p_playlist, p_playlist->p_stats );
 270         if( p_playlist->p_input )
 271         {
 272             stats_ComputeInputStats( p_playlist->p_input,
 273                                 p_playlist->p_input->input.p_item->p_stats );
 274         }
 275     }
 276 }