b4s.c

video linux conference

/*****************************************************************************
 * b4s.c : B4S playlist format import
 *****************************************************************************
 * Copyright (C) 2005 VideoLAN
 * $Id: b4s.c 11539 2005-06-25 13:31:08Z dionoea $
 *
 * Authors: Sigmund Augdal <[e-mail]>
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* malloc(), free() */

#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/intf.h>

#include <errno.h>                                                 /* ENOMEM */
#include "playlist.h"
#include "vlc_xml.h"

struct demux_sys_t
{
    char *psz_prefix;
    playlist_t *p_playlist;
    xml_t *p_xml;
    xml_reader_t *p_xml_reader;
    int b_shout;
};

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int Demux( demux_t *p_demux);
static int Control( demux_t *p_demux, int i_query, va_list args );
static char *get_next_token(char *cur_string);
static int IsWhitespace( char *psz_string );
static void ShoutcastAdd( playlist_t *p_playlist, playlist_item_t* p_genre,
                          playlist_item_t *p_bitrate, playlist_item_t *p_item,
                          char *psz_genre, char *psz_bitrate );

/*****************************************************************************
 * Import_B4S: main import function
 *****************************************************************************/
int E_(Import_B4S)( vlc_object_t *p_this )
{
    demux_t *p_demux = (demux_t *)p_this;
    demux_sys_t *p_sys;

    char    *psz_ext;

    psz_ext = strrchr ( p_demux->psz_path, '.' );

    if( ( psz_ext && !strcasecmp( psz_ext, ".b4s") ) ||
        ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "b4s-open") ) ||
        ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "shout-b4s") ) )
    {
        ;
    }
    else
    {
        return VLC_EGENERIC;
    }
    msg_Dbg( p_demux, "using b4s playlist import");

    p_demux->pf_control = Control;
    p_demux->pf_demux = Demux;
    p_demux->p_sys = p_sys = malloc( sizeof(demux_sys_t) );
    if( p_sys == NULL )
    {
        msg_Err( p_demux, "Out of memory" );
        return VLC_ENOMEM;
    }
    p_sys->b_shout = p_demux->psz_demux &&
        !strcmp(p_demux->psz_demux, "shout-b4s");
    p_sys->psz_prefix = E_(FindPrefix)( p_demux );
    p_sys->p_playlist = NULL;
    p_sys->p_xml = NULL;
    p_sys->p_xml_reader = NULL;

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Deactivate: frees unused data
 *****************************************************************************/
void E_(Close_B4S)( vlc_object_t *p_this )
{
    demux_t *p_demux = (demux_t *)p_this;
    demux_sys_t *p_sys = p_demux->p_sys;

    if( p_sys->psz_prefix ) free( p_sys->psz_prefix );
    if( p_sys->p_playlist ) vlc_object_release( p_sys->p_playlist );
    if( p_sys->p_xml_reader ) xml_ReaderDelete( p_sys->p_xml, p_sys->p_xml_reader );
    if( p_sys->p_xml ) xml_Delete( p_sys->p_xml );
    free( p_sys );
}

static int Demux( demux_t *p_demux )
{
    demux_sys_t *p_sys = p_demux->p_sys;
    playlist_t *p_playlist;
    playlist_item_t *p_item, *p_current;
    playlist_item_t *p_bitrate = NULL, *p_genre = NULL;

    vlc_bool_t b_play;
    int i_ret;

    xml_t *p_xml;
    xml_reader_t *p_xml_reader;
    char *psz_elname = NULL;
    int i_type, b_shoutcast;
    char *psz_mrl = NULL, *psz_name = NULL, *psz_genre = NULL;
    char *psz_now = NULL, *psz_listeners = NULL, *psz_bitrate = NULL;


    b_shoutcast = p_sys->b_shout;

    p_playlist = (playlist_t *) vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
                                                 FIND_PARENT );
    if( !p_playlist )
    {
        msg_Err( p_demux, "can't find playlist" );
        return -1;
    }
    p_sys->p_playlist = p_playlist;

    b_play = E_(FindItem)( p_demux, p_playlist, &p_current );

    playlist_ItemToNode( p_playlist, p_current );
    p_current->input.i_type = ITEM_TYPE_PLAYLIST;
    if( b_shoutcast )
    {
        p_genre = playlist_NodeCreate( p_playlist, p_current->pp_parents[0]->i_view, "Genre", p_current );
        playlist_CopyParents( p_current, p_genre );

        p_bitrate = playlist_NodeCreate( p_playlist, p_current->pp_parents[0]->i_view, "Bitrate", p_current );
        playlist_CopyParents( p_current, p_bitrate );
    }
    
    p_xml = p_sys->p_xml = xml_Create( p_demux );
    if( !p_xml ) return -1;

    psz_elname = stream_ReadLine( p_demux->s );
    if( psz_elname ) free( psz_elname );
    psz_elname = 0;

    p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
    if( !p_xml_reader ) return -1;
    p_sys->p_xml_reader = p_xml_reader;

    /* xml */
    /* check root node */
    if( xml_ReaderRead( p_xml_reader ) != 1 )
    {
        msg_Err( p_demux, "invalid file (no root node)" );
        return -1;
    }

    if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
        ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
        strcmp( psz_elname, "WinampXML" ) )
    {
        msg_Err( p_demux, "invalid root node %i, %s",
                 xml_ReaderNodeType( p_xml_reader ), psz_elname );
        if( psz_elname ) free( psz_elname );
        return -1;
    }
    free( psz_elname );

    /* root node should not have any attributes, and should only
     * contain the "playlist node */

    /* Skip until 1st child node */
    while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 &&
           xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM );
    if( i_ret != 1 )
    {
        msg_Err( p_demux, "invalid file (no child node)" );
        return -1;
    }

    if( ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
        strcmp( psz_elname, "playlist" ) )
    {
        msg_Err( p_demux, "invalid child node %s", psz_elname );
        if( psz_elname ) free( psz_elname );
        return -1;
    }
    free( psz_elname ); psz_elname = 0;

    // Read the attributes
    while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
    {
        char *psz_name = xml_ReaderName( p_xml_reader );
        char *psz_value = xml_ReaderValue( p_xml_reader );
        if( !psz_name || !psz_value ) return -1;
        if( !strcmp( psz_name, "num_entries" ) )
        {
            msg_Dbg( p_demux, "playlist has %d entries", atoi(psz_value) );
        }
        else if( !strcmp( psz_name, "label" ) )
        {
            playlist_ItemSetName( p_current, psz_value );
        }
        else
        {
            msg_Warn( p_demux, "stray attribute %s with value %s in element"
                      " 'playlist'", psz_name, psz_value );
        }
        free( psz_name );
        free( psz_value );
    }

    while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 )
    {
        // Get the node type
        i_type = xml_ReaderNodeType( p_xml_reader );
        switch( i_type )
        {
            // Error
            case -1:
                return -1;
                break;

            case XML_READER_STARTELEM:
            {