loadsave.c 7.05 KB
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/*****************************************************************************
 * loadsave.c : Playlist loading / saving functions
 *****************************************************************************
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LGPL    
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 * Copyright (C) 1999-2004 VLC authors and VideoLAN
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 * $Id$
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 *
 * Authors: Samuel Hocevar <sam@zoy.org>
 *
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 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
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 * (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
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser 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.
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 *****************************************************************************/
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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

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#include <errno.h>
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#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

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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_fs.h>
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#include <vlc_url.h>
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#include <vlc_modules.h>
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int playlist_Export( playlist_t * p_playlist, const char *psz_filename,
                     playlist_item_t *p_export_root, const char *psz_type )
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{
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    if( p_export_root == NULL ) return VLC_EGENERIC;

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    playlist_export_t *p_export =
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        vlc_custom_create( p_playlist, sizeof( *p_export ), "playlist export" );
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    if( !p_export )
        return VLC_ENOMEM;
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    msg_Dbg( p_export, "saving %s to file %s",
             p_export_root->p_input->psz_name, psz_filename );
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    int ret = VLC_EGENERIC;
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    /* Prepare the playlist_export_t structure */
    p_export->p_root = p_export_root;
    p_export->psz_filename = psz_filename;
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    p_export->p_file = vlc_fopen( psz_filename, "wt" );
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    if( p_export->p_file == NULL )
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        msg_Err( p_export, "could not create playlist file %s: %s",
                 psz_filename, vlc_strerror_c(errno) );
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    else
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    {
        module_t *p_module;

        /* And call the module ! All work is done now */
        playlist_Lock( p_playlist );
        p_module = module_need( p_export, "playlist export", psz_type, true );
        playlist_Unlock( p_playlist );

        if( p_module == NULL )
            msg_Err( p_playlist, "could not export playlist" );
        else
        {
            module_unneed( p_export, p_module );
            ret = VLC_SUCCESS;
        }
        fclose( p_export->p_file );
   }
   vlc_object_release( p_export );
   return ret;
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}
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int playlist_Import( playlist_t *p_playlist, const char *psz_file )
{
    input_item_t *p_input;
    const char *const psz_option = "meta-file";
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    char *psz_uri = vlc_path2uri( psz_file, NULL );
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    if( psz_uri == NULL )
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        return VLC_EGENERIC;

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    p_input = input_item_NewExt( psz_uri, psz_file,
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                                 1, &psz_option, VLC_INPUT_OPTION_TRUSTED, -1 );
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    free( psz_uri );

    playlist_AddInput( p_playlist, p_input, PLAYLIST_APPEND, PLAYLIST_END,
                       true, false );
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    return input_Read( p_playlist, p_input );
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}

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/*****************************************************************************
 * A subitem has been added to the Media Library (Event Callback)
 *****************************************************************************/
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static void input_item_subitem_tree_added( const vlc_event_t * p_event,
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                                      void * user_data )
{
    playlist_t *p_playlist = user_data;
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    input_item_node_t *p_root =
        p_event->u.input_item_subitem_tree_added.p_root;
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    PL_LOCK;
    playlist_InsertInputItemTree ( p_playlist, p_playlist->p_media_library,
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                                   p_root, 0, false );
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    PL_UNLOCK;
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}

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int playlist_MLLoad( playlist_t *p_playlist )
{
    input_item_t *p_input;

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    char *psz_datadir = config_GetUserDir( VLC_DATA_DIR );
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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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    char *psz_file;
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    if( asprintf( &psz_file, "%s" DIR_SEP "ml.xspf", psz_datadir ) == -1 )
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        psz_file = NULL;
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    free( psz_datadir );
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    if( psz_file == NULL )
        return VLC_ENOMEM;

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    /* lousy check for media library file */
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    struct stat st;
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    if( vlc_stat( psz_file, &st ) )
    {
        free( psz_file );
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        return VLC_EGENERIC;
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    }
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    char *psz_uri = vlc_path2uri( psz_file, "file/xspf-open" );
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    free( psz_file );
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    if( psz_uri == NULL )
        return VLC_ENOMEM;
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    const char *const options[1] = { "meta-file", };
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    /* that option has to be cleaned in input_item_subitem_tree_added() */
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    /* vlc_gc_decref() in the same function */
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    p_input = input_item_NewExt( psz_uri, _("Media Library"),
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                                 1, options, VLC_INPUT_OPTION_TRUSTED, -1 );
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    free( psz_uri );
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    if( p_input == NULL )
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        return VLC_EGENERIC;
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    PL_LOCK;
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    if( p_playlist->p_media_library->p_input )
        vlc_gc_decref( p_playlist->p_media_library->p_input );
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    p_playlist->p_media_library->p_input = p_input;
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    vlc_event_attach( &p_input->event_manager, vlc_InputItemSubItemTreeAdded,
                        input_item_subitem_tree_added, p_playlist );
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    pl_priv(p_playlist)->b_doing_ml = true;
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    PL_UNLOCK;

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    input_Read( p_playlist, p_input );
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    PL_LOCK;
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    pl_priv(p_playlist)->b_doing_ml = false;
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    PL_UNLOCK;
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    vlc_event_detach( &p_input->event_manager, vlc_InputItemSubItemTreeAdded,
                        input_item_subitem_tree_added, p_playlist );
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    return VLC_SUCCESS;
}

int playlist_MLDump( playlist_t *p_playlist )
{
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    char *psz_temp;
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    psz_temp = config_GetUserDir( VLC_DATA_DIR );
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    if( !psz_temp ) /* 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_temp ) + sizeof( DIR_SEP "ml.xspf")];
    strcpy( psz_dirname, psz_temp );
    free( psz_temp );
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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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    if ( asprintf( &psz_temp, "%s.tmp%"PRIu32, psz_dirname, (uint32_t)getpid() ) < 1 )
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        return VLC_EGENERIC;

    int i_ret = playlist_Export( p_playlist, psz_temp, p_playlist->p_media_library,
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                     "export-xspf" );
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    if ( i_ret != VLC_SUCCESS )
    {
        vlc_unlink( psz_temp );
        free( psz_temp );
        return i_ret;
    }
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    i_ret = vlc_rename( psz_temp, psz_dirname );
    free( psz_temp );
    if( i_ret == -1 )
    {
        msg_Err( p_playlist, "could not rename %s.tmp: %s",
                 psz_dirname, vlc_strerror_c(errno) );
        return VLC_EGENERIC;
    }
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    return VLC_SUCCESS;
}