loadsave.c 6.95 KB
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/*****************************************************************************
 * loadsave.c : Playlist loading / saving functions
 *****************************************************************************
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 * Copyright (C) 1999-2004 the VideoLAN team
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 * $Id$
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 *
 * Authors: Samuel Hocevar <sam@zoy.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
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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 *****************************************************************************/
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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

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#include <vlc_common.h>
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#include <vlc_playlist.h>
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#include <vlc_events.h>
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#include "playlist_internal.h"
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#include "config/configuration.h"
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#include <vlc_charset.h>

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#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
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#include <errno.h>
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int playlist_Export( playlist_t * p_playlist, const char *psz_filename ,
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                     playlist_item_t *p_export_root,const char *psz_type )
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{
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    module_t *p_module;
    playlist_export_t *p_export;
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    if( p_export_root == NULL ) return VLC_EGENERIC;

    msg_Info( p_playlist, "saving %s to file %s",
                    p_export_root->p_input->psz_name, psz_filename );
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    /* Prepare the playlist_export_t structure */
    p_export = (playlist_export_t *)malloc( sizeof(playlist_export_t) );
    if( !p_export)
        return VLC_ENOMEM;
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    p_export->psz_filename = NULL;
    if ( psz_filename )
        p_export->psz_filename = strdup( psz_filename );
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    p_export->p_file = utf8_fopen( psz_filename, "wt" );
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    if( !p_export->p_file )
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    {
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        msg_Err( p_playlist , "could not create playlist file %s (%m)",
                 psz_filename );
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        return VLC_EGENERIC;
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    }

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    p_export->p_root = p_export_root;

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    /* Lock the playlist */
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    vlc_object_lock( p_playlist );
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    p_playlist->p_private = (void *)p_export;
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    /* And call the module ! All work is done now */
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    p_module = module_Need( p_playlist, "playlist export", psz_type, true);
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    if( !p_module )
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    {
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        msg_Warn( p_playlist, "exporting playlist failed" );
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        vlc_object_unlock( p_playlist );
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        return VLC_ENOOBJ;
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    }
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    module_Unneed( p_playlist , p_module );
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    /* Clean up */
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    fclose( p_export->p_file );
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    free( p_export->psz_filename );
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    free ( p_export );
    p_playlist->p_private = NULL;
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    vlc_object_unlock( p_playlist );
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    return VLC_SUCCESS;
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}
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/*****************************************************************************
 * A subitem has been added to the Media Library (Event Callback)
 *****************************************************************************/
static void input_item_subitem_added( const vlc_event_t * p_event,
                                      void * user_data )
{
    playlist_t *p_playlist = user_data;
    input_item_t *p_item = p_event->u.input_item_subitem_added.p_new_child;
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    /* playlist_AddInput() can fail, but we have no way to report that ..
     * Any way when it has failed, either the playlist is dying, either OOM */
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    playlist_AddInput( p_playlist, p_item, PLAYLIST_APPEND, PLAYLIST_END,
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            false, false );
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}

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int playlist_MLLoad( playlist_t *p_playlist )
{
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    char *psz_datadir = config_GetUserDataDir();
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    char *psz_uri = NULL;
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    input_item_t *p_input;

    if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
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    if( !psz_datadir ) /* XXX: This should never happen */
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    {
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        msg_Err( p_playlist, "no data directory, cannot load media library") ;
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        return VLC_EGENERIC;
    }
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    if( asprintf( &psz_uri, "%s" DIR_SEP "ml.xspf", psz_datadir ) == -1 )
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    {
        psz_uri = NULL;
        goto error;
    }
    struct stat p_stat;
    /* checks if media library file is present */
    if( utf8_stat( psz_uri , &p_stat ) )
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        goto error;
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    free( psz_uri );

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    /* FIXME: WTF? stat() should never be used right before open()! */
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    if( asprintf( &psz_uri, "file/xspf-open://%s" DIR_SEP "ml.xspf",
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                  psz_datadir ) == -1 )
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    {
        psz_uri = NULL;
        goto error;
    }
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    free( psz_datadir );
    psz_datadir = NULL;
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    const char *const psz_option = "meta-file";
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    /* that option has to be cleaned in input_item_subitem_added() */
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    /* vlc_gc_decref() in the same function */
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    p_input = input_ItemNewExt( p_playlist, psz_uri,
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                                _("Media Library"), 1, &psz_option, -1 );
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    if( p_input == NULL )
        goto error;

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    PL_LOCK;
    if( p_playlist->p_ml_onelevel->p_input )
        vlc_gc_decref( p_playlist->p_ml_onelevel->p_input );
    if( p_playlist->p_ml_category->p_input )
        vlc_gc_decref( p_playlist->p_ml_category->p_input );

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    p_playlist->p_ml_onelevel->p_input =
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    p_playlist->p_ml_category->p_input = p_input;
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    /* We save the input at two different place, incref */
    vlc_gc_incref( p_input );
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    vlc_gc_incref( p_input );

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    vlc_event_attach( &p_input->event_manager, vlc_InputItemSubItemAdded,
                        input_item_subitem_added, p_playlist );
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    p_playlist->b_doing_ml = true;
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    PL_UNLOCK;

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    stats_TimerStart( p_playlist, "ML Load", STATS_TIMER_ML_LOAD );
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    input_Read( p_playlist, p_input, true );
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    stats_TimerStop( p_playlist,STATS_TIMER_ML_LOAD );
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    PL_LOCK;
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    p_playlist->b_doing_ml = false;
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    PL_UNLOCK;
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    vlc_event_detach( &p_input->event_manager, vlc_InputItemSubItemAdded,
                        input_item_subitem_added, p_playlist );

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    vlc_gc_decref( p_input );
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    free( psz_uri );
    return VLC_SUCCESS;
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error:
    free( psz_uri );
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    free( psz_datadir );
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    return VLC_ENOMEM;
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}

int playlist_MLDump( playlist_t *p_playlist )
{
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    char *psz_datadir = config_GetUserDataDir();
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    if( !config_GetInt( p_playlist, "media-library") ) return VLC_SUCCESS;
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    if( !psz_datadir ) /* XXX: This should never happen */
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    {
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        msg_Err( p_playlist, "no data directory, cannot save media library") ;
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        return VLC_EGENERIC;
    }
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    char psz_dirname[ strlen( psz_datadir ) + sizeof( DIR_SEP "ml.xspf")];
    strcpy( psz_dirname, psz_datadir );
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    free( psz_datadir );
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    if( config_CreateDir( (vlc_object_t *)p_playlist, psz_dirname ) )
    {
        return VLC_EGENERIC;
    }

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    strcat( psz_dirname, DIR_SEP "ml.xspf" );
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    stats_TimerStart( p_playlist, "ML Dump", STATS_TIMER_ML_DUMP );
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    playlist_Export( p_playlist, psz_dirname, p_playlist->p_ml_category,
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                     "export-xspf" );
    stats_TimerStop( p_playlist, STATS_TIMER_ML_DUMP );

    return VLC_SUCCESS;
}