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 bool IsWhitespace( const 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 )
74 xml_reader_t *p_xml_reader = NULL;
75 char *psz_elname = NULL;
76 input_item_t *p_input;
77 char *psz_mrl = NULL, *psz_title = NULL, *psz_genre = NULL;
78 char *psz_now = NULL, *psz_listeners = NULL, *psz_bitrate = NULL;
79 input_item_node_t *p_subitems = NULL;
81 input_item_t *p_current_input = GetCurrentItem(p_demux);
83 free( stream_ReadLine( p_demux->s ) );
85 p_xml_reader = xml_ReaderCreate( p_demux, p_demux->s );
91 if( xml_ReaderNextNode( p_xml_reader ) != XML_READER_STARTELEM )
93 msg_Err( p_demux, "invalid file (no root node)" );
97 if( ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
98 strcmp( psz_elname, "WinampXML" ) )
100 msg_Err( p_demux, "invalid root node: %s", psz_elname );
103 FREENULL( psz_elname );
105 /* root node should not have any attributes, and should only
106 * contain the "playlist node */
108 /* Skip until 1st child node */
109 while( (i_ret = xml_ReaderNextNode( p_xml_reader )) != XML_READER_STARTELEM )
112 msg_Err( p_demux, "invalid file (no child node)" );
116 if( ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
117 strcmp( psz_elname, "playlist" ) )
119 msg_Err( p_demux, "invalid child node %s", psz_elname );
122 FREENULL( psz_elname );
124 // Read the attributes
126 while( (attr = xml_ReaderNextAttr( p_xml_reader )) != NULL )
128 char *psz_value = xml_ReaderValue( p_xml_reader );
135 if( !strcmp( attr, "num_entries" ) )
136 msg_Dbg( p_demux, "playlist has %d entries", atoi(psz_value) );
137 else if( !strcmp( attr, "label" ) )
138 input_item_SetName( p_current_input, psz_value );
140 msg_Warn( p_demux, "stray attribute %s with value %s in element"
141 " 'playlist'", attr, psz_value );
145 p_subitems = input_item_node_Create( p_current_input );
147 while( (i_ret = xml_ReaderNextNode( p_xml_reader )) > 0 )
152 case XML_READER_STARTELEM:
154 // Read the element name
156 psz_elname = xml_ReaderName( p_xml_reader );
160 // Read the attributes
161 while( (attr = xml_ReaderNextAttr( p_xml_reader )) )
163 char *psz_value = xml_ReaderValue( p_xml_reader );
169 if( !strcmp( psz_elname, "entry" ) &&
170 !strcmp( attr, "Playstring" ) )
176 msg_Warn( p_demux, "unexpected attribute %s in element %s",
183 case XML_READER_TEXT:
185 char *psz_text = xml_ReaderValue( p_xml_reader );
186 if( IsWhitespace( psz_text ) )
191 if( !strcmp( psz_elname, "Name" ) )
193 psz_title = psz_text;
195 else if( !strcmp( psz_elname, "Genre" ) )
197 psz_genre = psz_text;
199 else if( !strcmp( psz_elname, "Nowplaying" ) )
203 else if( !strcmp( psz_elname, "Listeners" ) )
205 psz_listeners = psz_text;
207 else if( !strcmp( psz_elname, "Bitrate" ) )
209 psz_bitrate = psz_text;
211 else if( !strcmp( psz_elname, "" ) )
217 msg_Warn( p_demux, "unexpected text in element '%s'",
224 case XML_READER_ENDELEM:
226 // Read the element name
228 psz_elname = xml_ReaderName( p_xml_reader );
231 if( !strcmp( psz_elname, "entry" ) )
233 p_input = input_item_New( p_demux, psz_mrl, psz_title );
235 input_item_SetNowPlaying( p_input, psz_now );
237 input_item_SetGenre( p_input, psz_genre );
239 msg_Err( p_demux, "Unsupported meta listeners" );
241 msg_Err( p_demux, "Unsupported meta bitrate" );
243 input_item_node_AppendItem( p_subitems, p_input );
244 vlc_gc_decref( p_input );
245 FREENULL( psz_title );
247 FREENULL( psz_genre );
248 FREENULL( psz_bitrate );
249 FREENULL( psz_listeners );
253 psz_elname = strdup( "" );
262 msg_Warn( p_demux, "error while parsing data" );
263 i_ret = 0; /* Needed for correct operation of go back */
270 input_item_node_PostAndDelete( p_subitems );
272 vlc_gc_decref( p_current_input );
274 xml_ReaderDelete( p_xml_reader );
278 static int Control( demux_t *p_demux, int i_query, va_list args )
280 VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
284 static bool IsWhitespace( const char *psz_string )
286 psz_string += strspn( psz_string, " \t\r\n" );