thread.c 6.33 KB
Newer Older
1
/*****************************************************************************
2
 * thread.c : Playlist management functions
3
 *****************************************************************************
4
 * Copyright © 1999-2008 the VideoLAN team
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
 * $Id$
 *
 * Authors: Samuel Hocevar <sam@zoy.org>
 *          Clément Stenac <zorglub@videolan.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/
24 25 26 27
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

28
#include <vlc_common.h>
Jean-Paul Saman's avatar
Jean-Paul Saman committed
29
#include <vlc_es.h>
30
#include <vlc_input.h>
Clément Stenac's avatar
Clément Stenac committed
31 32
#include <vlc_interface.h>
#include <vlc_playlist.h>
33
#include "playlist_internal.h"
34 35 36 37 38 39

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static void RunControlThread ( playlist_t * );
static void RunPreparse( playlist_preparse_t * );
40
static void RunFetcher( playlist_fetcher_t * );
41 42
static void PreparseDestructor( vlc_object_t * );
static void FetcherDestructor( vlc_object_t * );
43 44 45 46 47 48 49 50 51 52 53 54 55

/*****************************************************************************
 * Main functions for the global thread
 *****************************************************************************/

/**
 * Create the main playlist thread
 * Additionally to the playlist, this thread controls :
 *    - Statistics
 *    - VLM
 * \param p_parent
 * \return an object with a started thread
 */
56
void __playlist_ThreadCreate( vlc_object_t *p_parent )
57
{
58
    playlist_t *p_playlist = playlist_Create( p_parent );
59
    if( !p_playlist ) return;
60 61 62 63 64 65 66

    // Preparse
    p_playlist->p_preparse = vlc_object_create( p_playlist,
                                  sizeof( playlist_preparse_t ) );
    if( !p_playlist->p_preparse )
    {
        msg_Err( p_playlist, "unable to create preparser" );
67
        vlc_object_release( p_playlist );
68
        return;
69
    }
70
    p_playlist->p_preparse->psz_object_name = strdup( "preparser" );
71 72 73
    p_playlist->p_preparse->i_waiting = 0;
    p_playlist->p_preparse->pp_waiting = NULL;

74 75
    vlc_object_set_destructor( p_playlist->p_preparse, PreparseDestructor );

76 77
    vlc_object_attach( p_playlist->p_preparse, p_playlist );
    if( vlc_thread_create( p_playlist->p_preparse, "preparser",
78
                           RunPreparse, VLC_THREAD_PRIORITY_LOW, true ) )
79 80
    {
        msg_Err( p_playlist, "cannot spawn preparse thread" );
81
        vlc_object_release( p_playlist->p_preparse );
82
        return;
83 84
    }

85
    // Secondary Preparse
86 87 88
    p_playlist->p_fetcher = vlc_object_create( p_playlist,
                              sizeof( playlist_fetcher_t ) );
    if( !p_playlist->p_fetcher )
89 90
    {
        msg_Err( p_playlist, "unable to create secondary preparser" );
91
        vlc_object_release( p_playlist );
92 93
        return;
    }
94
    p_playlist->p_fetcher->psz_object_name = strdup( "fetcher" );
95
    p_playlist->p_fetcher->i_waiting = 0;
Rafaël Carré's avatar
Rafaël Carré committed
96
    p_playlist->p_fetcher->pp_waiting = NULL;
97 98 99
    p_playlist->p_fetcher->i_art_policy = var_CreateGetInteger( p_playlist,
                                                                "album-art" );

100 101
    vlc_object_set_destructor( p_playlist->p_fetcher, FetcherDestructor );

102 103 104 105
    vlc_object_attach( p_playlist->p_fetcher, p_playlist );
    if( vlc_thread_create( p_playlist->p_fetcher,
                           "fetcher",
                           RunFetcher,
106
                           VLC_THREAD_PRIORITY_LOW, true ) )
107 108
    {
        msg_Err( p_playlist, "cannot spawn secondary preparse thread" );
109
        vlc_object_release( p_playlist->p_fetcher );
110 111 112
        return;
    }

113 114
    // Start the thread
    if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
115
                           VLC_THREAD_PRIORITY_LOW, true ) )
116 117
    {
        msg_Err( p_playlist, "cannot spawn playlist thread" );
118
        vlc_object_release( p_playlist );
119
        return;
120 121 122 123 124
    }

    /* The object has been initialized, now attach it */
    vlc_object_attach( p_playlist, p_parent );

125
    return;
126 127 128 129 130 131 132
}

/**
 * Run the main control thread itself
 */
static void RunControlThread ( playlist_t *p_playlist )
{
Jean-Paul Saman's avatar
Jean-Paul Saman committed
133 134
    /* Tell above that we're ready */
    vlc_thread_ready( p_playlist );
135

136 137
    vlc_object_lock( p_playlist );
    while( vlc_object_alive( p_playlist ) )
138
    {
139
        PL_UNLOCK;
140
        playlist_MainLoop( p_playlist );
141
        PL_LOCK;
142

143 144 145 146 147
        /* The playlist lock has been unlocked, so we can't tell if
         * someone has killed us in the meantime. Check now. */
        if( !vlc_object_alive( p_playlist ) )
            break;

148 149 150
        if( p_playlist->b_cant_sleep )
        {
            /* 100 ms is an acceptable delay for playlist operations */
151
            PL_UNLOCK;
152
            msleep( INTF_IDLE_SLEEP*2 );
153
            PL_LOCK;
154 155 156
        }
        else
        {
157
            vlc_object_wait( p_playlist );
158
        }
159
    }
160 161
    vlc_object_unlock( p_playlist );

162 163 164 165 166 167 168 169 170 171
    playlist_LastLoop( p_playlist );
}

/*****************************************************************************
 * Preparse-specific functions
 *****************************************************************************/
static void RunPreparse ( playlist_preparse_t *p_obj )
{
    /* Tell above that we're ready */
    vlc_thread_ready( p_obj );
172
    playlist_PreparseLoop( p_obj );
173 174
}

175
static void RunFetcher( playlist_fetcher_t *p_obj )
176 177 178
{
    /* Tell above that we're ready */
    vlc_thread_ready( p_obj );
179
    playlist_FetcherLoop( p_obj );
180
}
181 182 183 184 185 186 187 188 189 190

static void PreparseDestructor( vlc_object_t * p_this )
{
    playlist_preparse_t * p_preparse = (playlist_preparse_t *)p_this;
    free( p_preparse->pp_waiting );
}

static void FetcherDestructor( vlc_object_t * p_this )
{
    playlist_fetcher_t * p_fetcher = (playlist_fetcher_t *)p_this;
Rafaël Carré's avatar
Rafaël Carré committed
191
    free( p_fetcher->pp_waiting );
192
}