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rss.c：源码内容
							/*****************************************************************************
 * rss.c : rss/atom feed display video plugin for vlc
 *****************************************************************************
 * Copyright (C) 2003-2006 the VideoLAN team
 * $Id: bb5a330c682a4df693c01c8cf76405e8e3b7e609 $
 *
 * Authors: Antoine Cellerier <dionoea -at- videolan -dot- 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.
 *****************************************************************************/
/*****************************************************************************
 * Atom : http://www.ietf.org/rfc/rfc4287.txt
 * RSS : http://www.rssboard.org/rss-specification
 *****************************************************************************/
/*****************************************************************************
 * Preamble
 *****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_vout.h>
#include "vlc_filter.h"
#include "vlc_block.h"
#include "vlc_osd.h"
#include "vlc_block.h"
#include "vlc_stream.h"
#include "vlc_xml.h"
#include <vlc_charset.h>
#include <vlc_image.h>
#include <time.h>
/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int  CreateFilter ( vlc_object_t * );
static void DestroyFilter( vlc_object_t * );
static subpicture_t *Filter( filter_t *, mtime_t );
static int FetchRSS( filter_t * );
static void FreeRSS( filter_t * );
static const int pi_color_values[] = {
               0xf0000000, 0x00000000, 0x00808080, 0x00C0C0C0,
               0x00FFFFFF, 0x00800000, 0x00FF0000, 0x00FF00FF, 0x00FFFF00,
               0x00808000, 0x00008000, 0x00008080, 0x0000FF00, 0x00800080,
               0x00000080, 0x000000FF, 0x0000FFFF};
static const char *const ppsz_color_descriptions[] = {
               N_("Default"), N_("Black"),
               N_("Gray"), N_("Silver"), N_("White"), N_("Maroon"), N_("Red"),
               N_("Fuchsia"), N_("Yellow"), N_("Olive"), N_("Green"),
               N_("Teal"), N_("Lime"), N_("Purple"), N_("Navy"), N_("Blue"),
               N_("Aqua") };
/*****************************************************************************
 * filter_sys_t: rss filter descriptor
 *****************************************************************************/
struct rss_item_t
{
    char *psz_title;
    char *psz_description;
    char *psz_link;
};
struct rss_feed_t
{
    char *psz_title;
    char *psz_description;
    char *psz_link;
    char *psz_image;
    picture_t *p_pic;
    int i_items;
    struct rss_item_t *p_items;
};
struct filter_sys_t
{
    vlc_mutex_t lock;
    vlc_mutex_t *p_lock;
    int i_xoff, i_yoff;  /* offsets for the display string in the video window */
    int i_pos; /* permit relative positioning (top, bottom, left, right, center) */
    int i_speed;
    int i_length;
    char *psz_marquee;    /* marquee string */
    text_style_t *p_style; /* font control */
    mtime_t last_date;
    char *psz_urls;
    int i_feeds;
    struct rss_feed_t *p_feeds;
    int i_ttl;
    time_t t_last_update;
    bool b_images;
    int i_title;
    int i_cur_feed;
    int i_cur_item;
    int i_cur_char;
};
#define MSG_TEXT N_("Feed URLs")
#define MSG_LONGTEXT N_("RSS/Atom feed '|' (pipe) seperated URLs.")
#define SPEED_TEXT N_("Speed of feeds")
#define SPEED_LONGTEXT N_("Speed of the RSS/Atom feeds in microseconds (bigger is slower).")
#define LENGTH_TEXT N_("Max length")
#define LENGTH_LONGTEXT N_("Maximum number of characters displayed on the " 
                "screen." )
#define TTL_TEXT N_("Refresh time")
#define TTL_LONGTEXT N_("Number of seconds between each forced refresh " 
        "of the feeds. 0 means that the feeds are never updated." )
#define IMAGE_TEXT N_("Feed images")
#define IMAGE_LONGTEXT N_("Display feed images if available.")
#define POSX_TEXT N_("X offset")
#define POSX_LONGTEXT N_("X offset, from the left screen edge." )
#define POSY_TEXT N_("Y offset")
#define POSY_LONGTEXT N_("Y offset, down from the top." )
#define OPACITY_TEXT N_("Opacity")
#define OPACITY_LONGTEXT N_("Opacity (inverse of transparency) of " 
    "overlay text. 0 = transparent, 255 = totally opaque." )
#define SIZE_TEXT N_("Font size, pixels")
#define SIZE_LONGTEXT N_("Font size, in pixels. Default is -1 (use default " 
    "font size)." )
#define COLOR_TEXT N_("Color")
#define COLOR_LONGTEXT N_("Color of the text that will be rendered on "
    "the video. This must be an hexadecimal (like HTML colors). The first two "
    "chars are for red, then green, then blue. #000000 = black, #FF0000 = red,"
    " #00FF00 = green, #FFFF00 = yellow (red + green), #FFFFFF = white" )
#define POS_TEXT N_("Text position")
#define POS_LONGTEXT N_( 
  "You can enforce the text position on the video " 
  "(0=center, 1=left, 2=right, 4=top, 8=bottom; you can " 
  "also use combinations of these values, eg 6 = top-right).")
#define TITLE_TEXT N_("Title display mode")
#define TITLE_LONGTEXT N_("Title display mode. Default is 0 (hidden) if the feed has an image and feed images are enabled, 1 otherwise.")
static const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
static const char *const ppsz_pos_descriptions[] =
     { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
     N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
enum title_modes {
    default_title=-1,
    hide_title,
    prepend_title,
    scroll_title };
static const int pi_title_modes[] = { default_title, hide_title, prepend_title, scroll_title };
static const char *const ppsz_title_modes[] =
    { N_("Default"), N_("Don't show"), N_("Always visible"), N_("Scroll with feed") };
#define CFG_PREFIX "rss-"
/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin ()
    set_capability( "sub filter", 1 )
    set_shortname( "RSS / Atom" )
    set_callbacks( CreateFilter, DestroyFilter )
    set_category( CAT_VIDEO )
    set_subcategory( SUBCAT_VIDEO_SUBPIC )
    add_string( CFG_PREFIX "urls", "rss", NULL, MSG_TEXT, MSG_LONGTEXT, false )
    set_section( N_("Position"), NULL )
    add_integer( CFG_PREFIX "x", 0, NULL, POSX_TEXT, POSX_LONGTEXT, true )
    add_integer( CFG_PREFIX "y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, true )
    add_integer( CFG_PREFIX "position", -1, NULL, POS_TEXT, POS_LONGTEXT, false )
        change_integer_list( pi_pos_values, ppsz_pos_descriptions, NULL )
    set_section( N_("Font"), NULL )
    /* 5 sets the default to top [1] left [4] */
    add_integer_with_range( CFG_PREFIX "opacity", 255, 0, 255, NULL,
        OPACITY_TEXT, OPACITY_LONGTEXT, false )
    add_integer( CFG_PREFIX "color", 0xFFFFFF, NULL, COLOR_TEXT, COLOR_LONGTEXT,
                  false )
        change_integer_list( pi_color_values, ppsz_color_descriptions, NULL )
    add_integer( CFG_PREFIX "size", -1, NULL, SIZE_TEXT, SIZE_LONGTEXT, false )
    set_section( N_("Misc"), NULL )
    add_integer( CFG_PREFIX "speed", 100000, NULL, SPEED_TEXT, SPEED_LONGTEXT,
                 false )
    add_integer( CFG_PREFIX "length", 60, NULL, LENGTH_TEXT, LENGTH_LONGTEXT,
                 false )
    add_integer( CFG_PREFIX "ttl", 1800, NULL, TTL_TEXT, TTL_LONGTEXT, false )
    add_bool( CFG_PREFIX "images", 1, NULL, IMAGE_TEXT, IMAGE_LONGTEXT, false )
    add_integer( CFG_PREFIX "title", default_title, NULL, TITLE_TEXT, TITLE_LONGTEXT, false )
        change_integer_list( pi_title_modes, ppsz_title_modes, NULL )
    set_description( N_("RSS and Atom feed display") )
    add_shortcut( "rss" )
    add_shortcut( "atom" )
vlc_module_end ()
static const char *const ppsz_filter_options[] = {
    "urls", "x", "y", "position", "color", "size", "speed", "length",
    "ttl", "images", "title", NULL
};
/*****************************************************************************
 * CreateFilter: allocates RSS video filter
 *****************************************************************************/
static int CreateFilter( vlc_object_t *p_this )
{
    filter_t *p_filter = (filter_t *)p_this;
    filter_sys_t *p_sys;
    int i_feed;
    /* Allocate structure */
    p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
    if( p_sys == NULL )
        return VLC_ENOMEM;
    vlc_mutex_init( &p_sys->lock );
    vlc_mutex_lock( &p_sys->lock );
    config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
                       p_filter->p_cfg );
    p_sys->psz_urls = var_CreateGetString( p_filter, CFG_PREFIX "urls" );
    p_sys->i_title = var_CreateGetInteger( p_filter, CFG_PREFIX "title" );
    p_sys->i_cur_feed = 0;
    p_sys->i_cur_item = p_sys->i_title == scroll_title ? -1 : 0;
    p_sys->i_cur_char = 0;
    p_sys->i_feeds = 0;
    p_sys->p_feeds = NULL;
    p_sys->i_speed = var_CreateGetInteger( p_filter, CFG_PREFIX "speed" );
    p_sys->i_length = var_CreateGetInteger( p_filter, CFG_PREFIX "length" );
    p_sys->i_ttl = __MAX( 0, var_CreateGetInteger( p_filter, CFG_PREFIX "ttl" ) );
    p_sys->b_images = var_CreateGetBool( p_filter, CFG_PREFIX "images" );
    p_sys->psz_marquee = (char *)malloc( p_sys->i_length + 1 );
    if( p_sys->psz_marquee == NULL )
    {
        vlc_mutex_unlock( &p_sys->lock );
        vlc_mutex_destroy( &p_sys->lock );
        free( p_sys->psz_urls );
        free( p_sys );
        return VLC_ENOMEM;
    }
    p_sys->psz_marquee[p_sys->i_length] = '';
    p_sys->p_style = malloc( sizeof( text_style_t ));
    if( p_sys->p_style == NULL )
    {
        free( p_sys->psz_marquee );
        vlc_mutex_unlock( &p_sys->lock );
        vlc_mutex_destroy( &p_sys->lock );
        free( p_sys->psz_urls );
        free( p_sys );
        return VLC_ENOMEM;
    }
    memcpy( p_sys->p_style, &default_text_style, sizeof( text_style_t ));
    p_sys->i_xoff = var_CreateGetInteger( p_filter, CFG_PREFIX "x" );
    p_sys->i_yoff = var_CreateGetInteger( p_filter, CFG_PREFIX "y" );
    p_sys->i_pos = var_CreateGetInteger( p_filter, CFG_PREFIX "position" );
    p_sys->p_style->i_font_alpha = 255 - var_CreateGetInteger( p_filter, CFG_PREFIX "opacity" );
    p_sys->p_style->i_font_color = var_CreateGetInteger( p_filter, CFG_PREFIX "color" );
    p_sys->p_style->i_font_size = var_CreateGetInteger( p_filter, CFG_PREFIX "size" );
    if( p_sys->b_images == true && p_sys->p_style->i_font_size == -1 )
    {
        msg_Warn( p_filter, "rss-size wasn't specified. Feed images will thus be displayed without being resized" );
    }
    if( FetchRSS( p_filter ) )
    {
        msg_Err( p_filter, "failed while fetching RSS ... too bad" );
        free( p_sys->p_style );
        free( p_sys->psz_marquee );
        vlc_mutex_unlock( &p_sys->lock );
        vlc_mutex_destroy( &p_sys->lock );
        free( p_sys->psz_urls );
        free( p_sys );
        return VLC_EGENERIC;
    }
    p_sys->t_last_update = time( NULL );
    if( p_sys->i_feeds == 0 )
    {
        free( p_sys->p_style );
        free( p_sys->psz_marquee );
        vlc_mutex_unlock( &p_sys->lock );
        vlc_mutex_destroy( &p_sys->lock );
        free( p_sys->psz_urls );
        free( p_sys );
        return VLC_EGENERIC;
    }
    for( i_feed=0; i_feed < p_sys->i_feeds; i_feed ++ )
    {
        if( p_sys->p_feeds[i_feed].i_items == 0 )
        {
            free( p_sys->p_style );
            free( p_sys->psz_marquee );
            FreeRSS( p_filter );
            vlc_mutex_unlock( &p_sys->lock );
            vlc_mutex_destroy( &p_sys->lock );
            free( p_sys->psz_urls );
            free( p_sys );
            return VLC_EGENERIC;
        }
    }
    /* Misc init */
    p_filter->pf_sub_filter = Filter;
    p_sys->last_date = (mtime_t)0;
    vlc_mutex_unlock( &p_sys->lock );
    return VLC_SUCCESS;
}
/*****************************************************************************
 * DestroyFilter: destroy RSS video filter
 *****************************************************************************/
static void DestroyFilter( vlc_object_t *p_this )
{
    filter_t *p_filter = (filter_t *)p_this;
    filter_sys_t *p_sys = p_filter->p_sys;
    vlc_mutex_lock( &p_sys->lock );
    free( p_sys->p_style );
    free( p_sys->psz_marquee );
    free( p_sys->psz_urls );
    FreeRSS( p_filter );
    vlc_mutex_unlock( &p_sys->lock );
    vlc_mutex_destroy( &p_sys->lock );
    free( p_sys );
    /* Delete the RSS variables */
    var_Destroy( p_filter, CFG_PREFIX "urls" );
    var_Destroy( p_filter, CFG_PREFIX "speed" );
    var_Destroy( p_filter, CFG_PREFIX "length" );
    var_Destroy( p_filter, CFG_PREFIX "ttl" );
    var_Destroy( p_filter, CFG_PREFIX "images" );
    var_Destroy( p_filter, CFG_PREFIX "x" );
    var_Destroy( p_filter, CFG_PREFIX "y" );
    var_Destroy( p_filter, CFG_PREFIX "position" );
    var_Destroy( p_filter, CFG_PREFIX "color");
    var_Destroy( p_filter, CFG_PREFIX "opacity");
    var_Destroy( p_filter, CFG_PREFIX "size");
    var_Destroy( p_filter, CFG_PREFIX "title" );
}
/****************************************************************************
 * Filter: the whole thing
 ****************************************************************************
 * This function outputs subpictures at regular time intervals.
 ****************************************************************************/
static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
{
    filter_sys_t *p_sys = p_filter->p_sys;
    subpicture_t *p_spu;
    video_format_t fmt;
    subpicture_region_t *p_region;
    int i_feed, i_item;
    struct rss_feed_t *p_feed;
    memset( &fmt, 0, sizeof(video_format_t) );
    vlc_mutex_lock( &p_sys->lock );
    if( p_sys->last_date
       + ( p_sys->i_cur_char == 0 && p_sys->i_cur_item == ( p_sys->i_title == scroll_title ? -1 : 0 ) ? 5 : 1 )
           /* ( ... ? 5 : 1 ) means "wait 5 times more for the 1st char" */
       * p_sys->i_speed > date )
    {
        vlc_mutex_unlock( &p_sys->lock );
        return NULL;
    }
    /* Do we need to update the feeds ? */
    if( p_sys->i_ttl
        && time( NULL ) > p_sys->t_last_update + (time_t)p_sys->i_ttl )
    {
        msg_Dbg( p_filter, "Forcing update of all the RSS feeds" );
        if( FetchRSS( p_filter ) )
        {
            msg_Err( p_filter, "Failed while fetching RSS ... too bad" );
            vlc_mutex_unlock( &p_sys->lock );
            return NULL; /* FIXME : we most likely messed up all the data,
                          * so we might need to do something about it */
        }
        p_sys->t_last_update = time( NULL );
    }
    p_sys->last_date = date;
    p_sys->i_cur_char++;
    if( p_sys->i_cur_item == -1 ? p_sys->p_feeds[p_sys->i_cur_feed].psz_title[p_sys->i_cur_char] == 0 : p_sys->p_feeds[p_sys->i_cur_feed].p_items[p_sys->i_cur_item].psz_title[p_sys->i_cur_char] == 0 )
    {
        p_sys->i_cur_char = 0;
        p_sys->i_cur_item++;
        if( p_sys->i_cur_item >= p_sys->p_feeds[p_sys->i_cur_feed].i_items )
        {
            if( p_sys->i_title == scroll_title )
                p_sys->i_cur_item = -1;
            else
                p_sys->i_cur_item = 0;
            p_sys->i_cur_feed = (p_sys->i_cur_feed + 1)%p_sys->i_feeds;
        }
    }
    p_spu = filter_NewSubpicture( p_filter );
    if( !p_spu )
    {
        vlc_mutex_unlock( &p_sys->lock );
        return NULL;
    }
    fmt.i_chroma = VLC_FOURCC('T','E','X','T');
    p_spu->p_region = subpicture_region_New( &fmt );
    if( !p_spu->p_region )
    {
        p_filter->pf_sub_buffer_del( p_filter, p_spu );
        vlc_mutex_unlock( &p_sys->lock );
        return NULL;
    }
    /* Generate the string that will be displayed. This string is supposed to
       be p_sys->i_length characters long. */
    i_item = p_sys->i_cur_item;
    i_feed = p_sys->i_cur_feed;
    p_feed = &p_sys->p_feeds[i_feed];
    if( ( p_feed->p_pic && p_sys->i_title == default_title )
        || p_sys->i_title == hide_title )
    {
        /* Don't display the feed's title if we have an image */
        snprintf( p_sys->psz_marquee, p_sys->i_length, "%s",
                  p_sys->p_feeds[i_feed].p_items[i_item].psz_title
                  +p_sys->i_cur_char );
    }
    else if( ( !p_feed->p_pic && p_sys->i_title == default_title )
             || p_sys->i_title == prepend_title )
    {
        snprintf( p_sys->psz_marquee, p_sys->i_length, "%s : %s",
                  p_sys->p_feeds[i_feed].psz_title,
                  p_sys->p_feeds[i_feed].p_items[i_item].psz_title
                  +p_sys->i_cur_char );
    }
    else /* scrolling title */
    {
        if( i_item == -1 )
            snprintf( p_sys->psz_marquee, p_sys->i_length, "%s : %s",
                      p_sys->p_feeds[i_feed].psz_title + p_sys->i_cur_char,
                      p_sys->p_feeds[i_feed].p_items[i_item+1].psz_title );
        else
            snprintf( p_sys->psz_marquee, p_sys->i_length, "%s",
                      p_sys->p_feeds[i_feed].p_items[i_item].psz_title
                      +p_sys->i_cur_char );
    }
    while( strlen( p_sys->psz_marquee ) < (unsigned int)p_sys->i_length )
    {
        i_item++;
        if( i_item == p_sys->p_feeds[i_feed].i_items ) break;
        snprintf( strchr( p_sys->psz_marquee, 0 ),
                  p_sys->i_length - strlen( p_sys->psz_marquee ),
                  " - %s",
                  p_sys->p_feeds[i_feed].p_items[i_item].psz_title );
    }
    /* Calls to snprintf might split multibyte UTF8 chars ...
     * which freetype doesn't like. */
    {
        char *a = strdup( p_sys->psz_marquee );
        char *a2 = a;
        char *b = p_sys->psz_marquee;
        EnsureUTF8( p_sys->psz_marquee );
        /* we want to use ' ' instead of '?' for erroneous chars */
        while( *b != '' )
        {
            if( *b != *a ) *b = ' ';
            b++;a++;
        }
        free( a2 );
    }
    p_spu->p_region->psz_text = strdup(p_sys->psz_marquee);
    if( p_sys->p_style->i_font_size > 0 )
        p_spu->p_region->fmt.i_visible_height = p_sys->p_style->i_font_size;
    p_spu->i_start = date;
    p_spu->i_stop  = 0;
    p_spu->b_ephemer = true;
    /*  where to locate the string: */
    if( p_sys->i_pos < 0 )
    {   /*  set to an absolute xy */
        p_spu->p_region->i_align = OSD_ALIGN_LEFT | OSD_ALIGN_TOP;
        p_spu->b_absolute = true;
    }
    else
    {   /* set to one of the 9 relative locations */
        p_spu->p_region->i_align = p_sys->i_pos;
        p_spu->b_absolute = false;
    }
    p_spu->p_region->p_style = p_sys->p_style;
    if( p_feed->p_pic )
    {
        /* Display the feed's image */
        picture_t *p_pic = p_feed->p_pic;
        video_format_t fmt_out;
        memset( &fmt_out, 0, sizeof(video_format_t) );
        fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
        fmt_out.i_aspect = VOUT_ASPECT_FACTOR;
        fmt_out.i_sar_num = fmt_out.i_sar_den = 1;
        fmt_out.i_width =
            fmt_out.i_visible_width = p_pic->p[Y_PLANE].i_visible_pitch;
        fmt_out.i_height =
            fmt_out.i_visible_height = p_pic->p[Y_PLANE].i_visible_lines;
        p_region = subpicture_region_New( &fmt_out );
        if( !p_region )
        {
            msg_Err( p_filter, "cannot allocate SPU region" );
        }
        else
        {
            p_region->i_x = p_sys->i_xoff;
            p_region->i_y = p_sys->i_yoff;
            /* FIXME the copy is probably not needed anymore */
            picture_Copy( p_region->p_picture, p_pic );
            p_spu->p_region->p_next = p_region;
        }
        /* Offset text to display right next to the image */
        p_spu->p_region->i_x = p_pic->p[Y_PLANE].i_visible_pitch;
    }
    vlc_mutex_unlock( &p_sys->lock );
    return p_spu;
}
/****************************************************************************
 * RSS related functions
 ****************************************************************************
 * You should always lock the p_filter mutex before using any of these
 * functions
 ***************************************************************************/
#undef LoadImage /* do not conflict with Win32 API */
/****************************************************************************
 * download and resize image located at psz_url
 ***************************************************************************/
static picture_t *LoadImage( filter_t *p_filter, const char *psz_url )
{
    filter_sys_t *p_sys = p_filter->p_sys;
    video_format_t fmt_in;
    video_format_t fmt_out;
    picture_t *p_orig;
    picture_t *p_pic = NULL;
    image_handler_t *p_handler = image_HandlerCreate( p_filter );
    memset( &fmt_in, 0, sizeof(video_format_t) );
    memset( &fmt_out, 0, sizeof(video_format_t) );
    fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
    p_orig = image_ReadUrl( p_handler, psz_url, &fmt_in, &fmt_out );
    if( !p_orig )
    {
        msg_Warn( p_filter, "Unable to read image %s", psz_url );
    }
    else if( p_sys->p_style->i_font_size > 0 )
    {
        fmt_in.i_chroma = VLC_FOURCC('Y','U','V','A');
        fmt_in.i_height = p_orig->p[Y_PLANE].i_visible_lines;
        fmt_in.i_width = p_orig->p[Y_PLANE].i_visible_pitch;
        fmt_out.i_width = p_orig->p[Y_PLANE].i_visible_pitch
            *p_sys->p_style->i_font_size/p_orig->p[Y_PLANE].i_visible_lines;
        fmt_out.i_height = p_sys->p_style->i_font_size;
        p_pic = image_Convert( p_handler, p_orig, &fmt_in, &fmt_out );
        picture_Release( p_orig );
        if( !p_pic )
        {
            msg_Warn( p_filter, "Error while converting %s", psz_url );
        }
    }
    else
    {
        p_pic = p_orig;
    }
    image_HandlerDelete( p_handler );
    return p_pic;
}
/****************************************************************************
 * remove all ' ' 't' 'n' 'r' characters from the begining and end of the
 * string.
 ***************************************************************************/
static char *removeWhiteChars( const char *psz_src )
{
    char *psz_src2,*psz_clean, *psz_clean2;
    psz_src2 = psz_clean = strdup( psz_src );
    int i;
    while( ( *psz_clean == ' ' || *psz_clean == 't'
           || *psz_clean == 'n' || *psz_clean == 'r' )
           && *psz_clean != '' )
    {
        psz_clean++;
    }
    i = strlen( psz_clean );
    while( --i > 0 &&
         ( psz_clean[i] == ' ' || psz_clean[i] == 't'
        || psz_clean[i] == 'n' || psz_clean[i] == 'r' ) );
    psz_clean[i+1] = '';
    psz_clean2 = strdup( psz_clean );
    free( psz_src2 );
    return psz_clean2;
}
/****************************************************************************
 * FetchRSS (or Atom) feeds
 ***************************************************************************/
static int FetchRSS( filter_t *p_filter)
{
    filter_sys_t *p_sys = p_filter->p_sys;
    stream_t *p_stream = NULL;
    xml_t *p_xml = NULL;
    xml_reader_t *p_xml_reader = NULL;
    char *psz_eltname = NULL;
    char *psz_eltvalue = NULL;
    char *psz_feed = NULL;
    char *psz_buffer = NULL;
    char *psz_buffer_2 = NULL;
    int i_feed;
    int i_item;
    bool b_is_item;
    bool b_is_image;
    int i_int;
    FreeRSS( p_filter );
    p_sys->i_feeds = 1;
    i_int = 0;
    while( p_sys->psz_urls[i_int] != 0 )
        if( p_sys->psz_urls[i_int++] == '|' )
            p_sys->i_feeds++;
    p_sys->p_feeds = (struct rss_feed_t *)malloc( p_sys->i_feeds
                                * sizeof( struct rss_feed_t ) );
    p_xml = xml_Create( p_filter );
    if( !p_xml )
    {
        msg_Err( p_filter, "Failed to open XML parser" );
        return 1;
    }
    psz_buffer = strdup( p_sys->psz_urls );
    psz_buffer_2 = psz_buffer; /* keep track so we can free it */
    for( i_feed = 0; i_feed < p_sys->i_feeds; i_feed++ )
    {
        struct rss_feed_t *p_feed = p_sys->p_feeds+i_feed;
        if( psz_buffer == NULL ) break;
        if( psz_buffer[0] == 0 ) psz_buffer++;
        psz_feed = psz_buffer;
        psz_buffer = strchr( psz_buffer, '|' );
        if( psz_buffer != NULL ) psz_buffer[0] = 0;
        p_feed->psz_title = NULL;
        p_feed->psz_description = NULL;
        p_feed->psz_link = NULL;
        p_feed->psz_image = NULL;
        p_feed->p_pic = NULL;
        p_feed->i_items = 0;
        p_feed->p_items = NULL;
        msg_Dbg( p_filter, "opening %s RSS/Atom feed ...", psz_feed );
        p_stream = stream_UrlNew( p_filter, psz_feed );
        if( !p_stream )
        {
            msg_Err( p_filter, "Failed to open %s for reading", psz_feed );
            xml_Delete( p_xml );
            return 1;
        }
        p_xml_reader = xml_ReaderCreate( p_xml, p_stream );
        if( !p_xml_reader )
        {
            msg_Err( p_filter, "Failed to open %s for parsing", psz_feed );
            xml_Delete( p_xml );
            return 1;
        }
        i_item = 0;
        b_is_item = false;
        b_is_image = false;
        while( xml_ReaderRead( p_xml_reader ) == 1 )
        {
            switch( xml_ReaderNodeType( p_xml_reader ) )
            {
                // Error
                case -1:
                    return 1;
                case XML_READER_STARTELEM:
                    free( psz_eltname );
                    psz_eltname = xml_ReaderName( p_xml_reader );
                    if( !psz_eltname )
                    {
                        return 1;
                    }
#                   ifdef RSS_DEBUG
                    msg_Dbg( p_filter, "element name: %s", psz_eltname );
#                   endif
                    if( !strcmp( psz_eltname, "item" ) /* rss */
                     || !strcmp( psz_eltname, "entry" ) ) /* atom */
                    {
                        b_is_item = true;
                        p_feed->i_items++;
                        p_feed->p_items = (struct rss_item_t *)realloc( p_feed->p_items, p_feed->i_items * sizeof( struct rss_item_t ) );
                        p_feed->p_items[p_feed->i_items-1].psz_title = NULL;
                        p_feed->p_items[p_feed->i_items-1].psz_description
                                                                     = NULL;
                        p_feed->p_items[p_feed->i_items-1].psz_link = NULL;
                    }
                    else if( !strcmp( psz_eltname, "image" ) ) /* rss */
                    {
                        b_is_image = true;
                    }
                    else if( !strcmp( psz_eltname, "link" ) ) /* atom */
                    {
                        char *psz_href = NULL;
                        char *psz_rel = NULL;
                        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( !strcmp( psz_name, "rel" ) )
                            {
                                if( psz_rel )
                                {
                                    msg_Dbg( p_filter, ""rel" attribute of link atom duplicated (last value: %s)", psz_value );
                                    free( psz_rel );
                                }
                                psz_rel = psz_value;
                            }
                            else if( !strcmp( psz_name, "href" ) )
                            {
                                if( psz_href )
                                {
                                    msg_Dbg( p_filter, ""href" attribute of link atom duplicated (last value: %s)", psz_href );
                                    free( psz_href );
                                }
                                psz_href = psz_value;
                            }
                            else
                            {
                                free( psz_value );
                            }
                            free( psz_name );
                        }
                        if( psz_rel && psz_href )
                        {
                            if( !strcmp( psz_rel, "alternate" )
                                && b_is_item == false
                                && b_is_image == false
                                && !p_feed->psz_link )
                            {
                                p_feed->psz_link = psz_href;
                            }
                            /* this isn't in the rfc but i found some ... */
                            else if( ( !strcmp( psz_rel, "logo" )
                                    || !strcmp( psz_rel, "icon" ) )
                                    && b_is_item == false
                                    && b_is_image == false
                                    && !p_feed->psz_image )
                            {
                                p_feed->psz_image = psz_href;
                            }
                            else
                            {
                                free( psz_href );
                            }
                        }
                        else
                        {
                            free( psz_href );
                        }
                        free( psz_rel );
                    }
                    break;
                case XML_READER_ENDELEM:
                    free( psz_eltname );
                    psz_eltname = NULL;
                    psz_eltname = xml_ReaderName( p_xml_reader );
                    if( !psz_eltname )
                    {
                        return 1;
                    }
#                   ifdef RSS_DEBUG
                    msg_Dbg( p_filter, "element end : %s", psz_eltname );
#                   endif
                    if( !strcmp( psz_eltname, "item" ) /* rss */
                     || !strcmp( psz_eltname, "entry" ) ) /* atom */
                    {
                        b_is_item = false;
                        i_item++;
                    }
                    else if( !strcmp( psz_eltname, "image" ) ) /* rss */
                    {
                        b_is_image = false;
                    }
                    free( psz_eltname );
                    psz_eltname = NULL;
                    break;
                case XML_READER_TEXT:
                    if( !psz_eltname ) break;
                    psz_eltvalue = xml_ReaderValue( p_xml_reader );
                    if( !psz_eltvalue )
                    {
                        return 1;
                    }
                    else
                    {
                        char *psz_clean;
                        psz_clean = removeWhiteChars( psz_eltvalue );
                        free( psz_eltvalue ); psz_eltvalue = psz_clean;
                    }
#                   ifdef RSS_DEBUG
                    msg_Dbg( p_filter, "  text : <%s>", psz_eltvalue );
#                   endif
                    if( b_is_item == true )
                    {
                        struct rss_item_t *p_item;
                        p_item = p_feed->p_items+i_item;
                        if( !strcmp( psz_eltname, "title" ) /* rss/atom */
                            && !p_item->psz_title )
                        {
                            p_item->psz_title = psz_eltvalue;
                        }
                        else if( !strcmp( psz_eltname, "link" ) /* rss */
                                 && !p_item->psz_link )
                        {
                            p_item->psz_link = psz_eltvalue;
                        }
                        else if((!strcmp( psz_eltname, "description" ) /* rss */
                              || !strcmp( psz_eltname, "summary" ) ) /* atom */
                              && !p_item->psz_description )
                        {
                            p_item->psz_description = psz_eltvalue;
                        }
                        else
                        {
                            free( psz_eltvalue );
                            psz_eltvalue = NULL;
                        }
                    }
                    else if( b_is_image == true )
                    {
                        if( !strcmp( psz_eltname, "url" ) /* rss */
                            && !p_feed->psz_image )
                        {
                            p_feed->psz_image = psz_eltvalue;
                        }
                        else
                        {
                            free( psz_eltvalue );
                            psz_eltvalue = NULL;
                        }
                    }
                    else
                    {
                        if( !strcmp( psz_eltname, "title" ) /* rss/atom */
                            && !p_feed->psz_title )
                        {
                            p_feed->psz_title = psz_eltvalue;
                        }
                        else if( !strcmp( psz_eltname, "link" ) /* rss */
                                 && !p_feed->psz_link )
                        {
                            p_feed->psz_link = psz_eltvalue;
                        }
                        else if((!strcmp( psz_eltname, "description" ) /* rss */
                              || !strcmp( psz_eltname, "subtitle" ) ) /* atom */
                              && !p_feed->psz_description )
                        {
                            p_feed->psz_description = psz_eltvalue;
                        }
                        else if( ( !strcmp( psz_eltname, "logo" ) /* atom */
                              || !strcmp( psz_eltname, "icon" ) ) /* atom */
                              && !p_feed->psz_image )
                        {
                            p_feed->psz_image = psz_eltvalue;
                        }
                        else
                        {
                            free( psz_eltvalue );
                            psz_eltvalue = NULL;
                        }
                    }
                    break;
            }
        }
        if( p_sys->b_images == true
            && p_feed->psz_image && !p_feed->p_pic )
        {
            p_feed->p_pic = LoadImage( p_filter, p_feed->psz_image );
        }
        if( p_xml_reader && p_xml ) xml_ReaderDelete( p_xml, p_xml_reader );
        if( p_stream ) stream_Delete( p_stream );
        msg_Dbg( p_filter, "done with %s RSS/Atom feed", psz_feed );
    }
    free( psz_buffer_2 );
    if( p_xml ) xml_Delete( p_xml );
    return 0;
}
/****************************************************************************
 * FreeRSS
 ***************************************************************************/
static void FreeRSS( filter_t *p_filter)
{
    filter_sys_t *p_sys = p_filter->p_sys;
    struct rss_item_t *p_item;
    struct rss_feed_t *p_feed;
    int i_feed;
    int i_item;
    for( i_feed = 0; i_feed < p_sys->i_feeds; i_feed++ )
    {
        p_feed = p_sys->p_feeds+i_feed;
        for( i_item = 0; i_item < p_feed->i_items; i_item++ )
        {
            p_item = p_feed->p_items+i_item;
            free( p_item->psz_title );
            free( p_item->psz_link );
            free( p_item->psz_description );
        }
        free( p_feed->p_items );
        free( p_feed->psz_title);
        free( p_feed->psz_link );
        free( p_feed->psz_description );
        free( p_feed->psz_image );
        if( p_feed->p_pic != NULL )
            picture_Release( p_feed->p_pic );
    }
    free( p_sys->p_feeds );
    p_sys->i_feeds = 0;
}

						