m3u.c

video linux conference

/*****************************************************************************
 * m3u.c: a meta demux to parse pls, m3u, asx et b4s playlists
 *****************************************************************************
 * Copyright (C) 2001-2004 VideoLAN
 * $Id: m3u.c 9961 2005-02-16 22:01:41Z robux4 $
 *
 * Authors: Sigmund Augdal <[e-mail]>
 *          Gildas Bazin <[e-mail]>
 *          Cl閙ent Stenac <[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_playlist.h>

/*****************************************************************************
 * Constants and structures
 *****************************************************************************/
#define MAX_LINE 8192

#define TYPE_UNKNOWN 0
#define TYPE_M3U 1
#define TYPE_ASX 2
#define TYPE_HTML 3
#define TYPE_PLS 4
#define TYPE_B4S 5
#define TYPE_WMP 6
#define TYPE_RTSP 7

struct demux_sys_t
{
    int i_type;                                   /* playlist type (m3u/asx) */
};

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int  Activate  ( vlc_object_t * );
static void Deactivate( vlc_object_t * );
static int  Demux     ( demux_t * );
static int  Control   ( demux_t *, int, va_list );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin();
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_DEMUX );
    set_description( _("Playlist metademux") );
    set_capability( "demux2", 5 );
    set_callbacks( Activate, Deactivate );
    add_shortcut( "m3u" );
    add_shortcut( "asx" );
    add_shortcut( "html" );
    add_shortcut( "pls" );
    add_shortcut( "b4s" );
vlc_module_end();

/*****************************************************************************
 * Activate: initializes m3u demux structures
 *****************************************************************************/
static int Activate( vlc_object_t * p_this )
{
    demux_t *p_demux = (demux_t *)p_this;
    char    *psz_ext;
    int     i_type  = TYPE_UNKNOWN;
    int     i_type2 = TYPE_UNKNOWN;

    p_demux->pf_control = Control;
    p_demux->pf_demux = Demux;

    /* Check for m3u/asx file extension or if the demux has been forced */
    psz_ext = strrchr ( p_demux->psz_path, '.' );

    if( ( psz_ext && !strcasecmp( psz_ext, ".m3u") ) ||
        /* a .ram file can contain a single rtsp link */
        ( psz_ext && !strcasecmp( psz_ext, ".ram") ) ||
        ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "m3u") ) )
    {
        i_type = TYPE_M3U;
    }
    else if( ( psz_ext && !strcasecmp( psz_ext, ".asx") ) ||
             ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "asx") ) )
    {
        i_type = TYPE_ASX;
    }
    else if( ( psz_ext && !strcasecmp( psz_ext, ".html") ) ||
             ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "html") ) )
    {
        i_type = TYPE_HTML;
    }
    else if( ( psz_ext && !strcasecmp( psz_ext, ".pls") ) ||
             ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "pls") ) )
    {
        i_type = TYPE_PLS;
    }
    else if( ( psz_ext && !strcasecmp( psz_ext, ".b4s") ) ||
             ( p_demux->psz_demux && !strcmp(p_demux->psz_demux, "b4s") ) )
    {
        i_type = TYPE_B4S;
    }

    /* we had no luck looking at the file extention, so we have a look
     * at the content. This is useful for .asp, .php and similar files
     * that are actually html. Also useful for some asx files that have
     * another extension */
    /* We double check for file != m3u as some asx are just m3u file */
    if( i_type != TYPE_M3U )
    {
        uint8_t *p_peek;
        int i_size = stream_Peek( p_demux->s, &p_peek, MAX_LINE );
        i_size -= sizeof("[Reference]") - 1;

        if( i_size > 0 )
        {
            while( i_size &&
                   strncasecmp(p_peek, "[playlist]", sizeof("[playlist]") - 1)
                   && strncasecmp( p_peek, "[Reference]", sizeof("[Reference]") - 1 )
                   && strncasecmp( p_peek, "<html>", sizeof("<html>") - 1 )
                   && strncasecmp( p_peek, "<asx", sizeof("<asx") - 1 )
                   && strncasecmp( p_peek, "rtsptext", sizeof("rtsptext") - 1 )
                   && strncasecmp( p_peek, "<?xml", sizeof("<?xml") -1 ) )
            {
                p_peek++;
                i_size--;
            }
            if( !i_size )
            {
                ;
            }
            else if( !strncasecmp( p_peek, "[playlist]", sizeof("[playlist]") -1 ) )
            {
                i_type2 = TYPE_PLS;
            }
            else if( !strncasecmp( p_peek, "[Reference]", sizeof("[Reference]") -1 ) )
            {
                i_type2 = TYPE_WMP;
            }
            else if( !strncasecmp( p_peek, "<html>", sizeof("<html>") -1 ) )
            {
                i_type2 = TYPE_HTML;
            }
            else if( !strncasecmp( p_peek, "<asx", sizeof("<asx") -1 ) )
            {
                i_type2 = TYPE_ASX;
            }
            else if( !strncasecmp( p_peek, "rtsptext", sizeof("rtsptext") -1 ) )
            {
                i_type2 = TYPE_RTSP;
            }
#if 0
            else if( !strncasecmp( p_peek, "<?xml", sizeof("<?xml") -1 ) )
            {
                i_type2 = TYPE_B4S;
            }
#endif
        }
    }
    if( i_type == TYPE_UNKNOWN && i_type2 == TYPE_UNKNOWN)
    {
        return VLC_EGENERIC;
    }
    if( i_type  != TYPE_UNKNOWN && i_type2 == TYPE_UNKNOWN )
    {
        i_type = TYPE_M3U;
    }
    else
    {
        i_type = i_type2;
    }

    /* Allocate p_m3u */
    p_demux->p_sys = malloc( sizeof( demux_sys_t ) );
    p_demux->p_sys->i_type = i_type;
    msg_Dbg( p_this, "Playlist type: %d - %d", i_type, i_type2 );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Deactivate: frees unused data
 *****************************************************************************/
static void Deactivate( vlc_object_t *p_this )
{
    demux_t *p_demux = (demux_t *)p_this;
    free( p_demux->p_sys );
}

/*****************************************************************************
 * XMLSpecialChars: Handle the special chars in a XML file.
 * ***************************************************************************/
static void XMLSpecialChars ( char *str )
{
    char *src = str;
    char *dst = str;

    while( *src )
    {
        if( *src == '&' )
        {
            if( !strncasecmp( src, "&#xe0;", 6 ) ) *dst++ = '