1 /*****************************************************************************
2 * b4s.c : B4S playlist format import
3 *****************************************************************************
4 * Copyright (C) 2005-2009 the VideoLAN team
7 * Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_demux.h>
42 /*****************************************************************************
44 *****************************************************************************/
45 static int Demux( demux_t *p_demux);
46 static int Control( demux_t *p_demux, int i_query, va_list args );
47 static int IsWhitespace( char *psz_string );
49 /*****************************************************************************
50 * Import_B4S: main import function
51 *****************************************************************************/
52 int Import_B4S( vlc_object_t *p_this )
54 DEMUX_BY_EXTENSION_OR_FORCED_MSG( ".b4s", "b4s-open",
55 "using B4S playlist reader" );
59 /*****************************************************************************
60 * Deactivate: frees unused data
61 *****************************************************************************/
62 void Close_B4S( vlc_object_t *p_this )
64 demux_t *p_demux = (demux_t *)p_this;
65 demux_sys_t *p_sys = p_demux->p_sys;
70 static int Demux( demux_t *p_demux )
75 xml_reader_t *p_xml_reader = NULL;
76 char *psz_elname = NULL;
77 input_item_t *p_input;
78 char *psz_mrl = NULL, *psz_title = NULL, *psz_genre = NULL;
79 char *psz_now = NULL, *psz_listeners = NULL, *psz_bitrate = NULL;
80 input_item_node_t *p_subitems = NULL;
82 input_item_t *p_current_input = GetCurrentItem(p_demux);
84 p_xml = xml_Create( p_demux );
88 psz_elname = stream_ReadLine( p_demux->s );
92 p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
98 if( xml_ReaderRead( p_xml_reader ) != 1 )
100 msg_Err( p_demux, "invalid file (no root node)" );
104 if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
105 ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
106 strcmp( psz_elname, "WinampXML" ) )
108 msg_Err( p_demux, "invalid root node %i, %s",
109 xml_ReaderNodeType( p_xml_reader ), psz_elname );
112 FREENULL( psz_elname );
114 /* root node should not have any attributes, and should only
115 * contain the "playlist node */
117 /* Skip until 1st child node */
118 while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 &&
119 xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM );
122 msg_Err( p_demux, "invalid file (no child node)" );
126 if( ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
127 strcmp( psz_elname, "playlist" ) )
129 msg_Err( p_demux, "invalid child node %s", psz_elname );
132 FREENULL( psz_elname );
134 // Read the attributes
135 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
137 char *psz_name = xml_ReaderName( p_xml_reader );
138 char *psz_value = xml_ReaderValue( p_xml_reader );
139 if( !psz_name || !psz_value )
145 if( !strcmp( psz_name, "num_entries" ) )
147 msg_Dbg( p_demux, "playlist has %d entries", atoi(psz_value) );
149 else if( !strcmp( psz_name, "label" ) )
151 input_item_SetName( p_current_input, psz_value );
155 msg_Warn( p_demux, "stray attribute %s with value %s in element"
156 " 'playlist'", psz_name, psz_value );
162 p_subitems = input_item_node_Create( p_current_input );
164 while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 )
167 switch( xml_ReaderNodeType( p_xml_reader ) )
173 case XML_READER_STARTELEM:
175 // Read the element name
177 psz_elname = xml_ReaderName( p_xml_reader );
181 // Read the attributes
182 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
184 char *psz_name = xml_ReaderName( p_xml_reader );
185 char *psz_value = xml_ReaderValue( p_xml_reader );
186 if( !psz_name || !psz_value )
192 if( !strcmp( psz_elname, "entry" ) &&
193 !strcmp( psz_name, "Playstring" ) )
199 msg_Warn( p_demux, "unexpected attribute %s in element %s",
200 psz_name, psz_elname );
207 case XML_READER_TEXT:
209 char *psz_text = xml_ReaderValue( p_xml_reader );
210 if( IsWhitespace( psz_text ) )
215 if( !strcmp( psz_elname, "Name" ) )
217 psz_title = psz_text;
219 else if( !strcmp( psz_elname, "Genre" ) )
221 psz_genre = psz_text;
223 else if( !strcmp( psz_elname, "Nowplaying" ) )
227 else if( !strcmp( psz_elname, "Listeners" ) )
229 psz_listeners = psz_text;
231 else if( !strcmp( psz_elname, "Bitrate" ) )
233 psz_bitrate = psz_text;
235 else if( !strcmp( psz_elname, "" ) )
241 msg_Warn( p_demux, "unexpected text in element '%s'",
248 case XML_READER_ENDELEM:
250 // Read the element name
252 psz_elname = xml_ReaderName( p_xml_reader );
255 if( !strcmp( psz_elname, "entry" ) )
257 p_input = input_item_New( p_demux, psz_mrl, psz_title );
259 input_item_SetNowPlaying( p_input, psz_now );
261 input_item_SetGenre( p_input, psz_genre );
263 msg_Err( p_demux, "Unsupported meta listeners" );
265 msg_Err( p_demux, "Unsupported meta bitrate" );
267 input_item_node_AppendItem( p_subitems, p_input );
268 vlc_gc_decref( p_input );
269 FREENULL( psz_title );
271 FREENULL( psz_genre );
272 FREENULL( psz_bitrate );
273 FREENULL( psz_listeners );
277 psz_elname = strdup( "" );
286 msg_Warn( p_demux, "error while parsing data" );
287 i_ret = 0; /* Needed for correct operation of go back */
294 input_item_node_PostAndDelete( p_subitems );
296 vlc_gc_decref( p_current_input );
298 xml_ReaderDelete( p_xml_reader );
304 static int Control( demux_t *p_demux, int i_query, va_list args )
306 VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
310 static int IsWhitespace( char *psz_string )
314 if( *psz_string != ' ' && *psz_string != '\t' && *psz_string != '\r' &&
315 *psz_string != '\n' )