1 /*****************************************************************************
2 * b4s.c : B4S playlist format import
3 *****************************************************************************
4 * Copyright (C) 2005 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>
34 #include <vlc_interface.h>
43 xml_reader_t *p_xml_reader;
46 /*****************************************************************************
48 *****************************************************************************/
49 static int Demux( demux_t *p_demux);
50 static int Control( demux_t *p_demux, int i_query, va_list args );
51 //static char *GetNextToken(char *psz_cur_string);
52 static int IsWhitespace( char *psz_string );
54 /*****************************************************************************
55 * Import_B4S: main import function
56 *****************************************************************************/
57 int Import_B4S( vlc_object_t *p_this )
59 DEMUX_BY_EXTENSION_OR_FORCED_MSG( ".b4s", "b4s-open",
60 "using B4S playlist reader" );
61 p_demux->p_sys->psz_prefix = FindPrefix( p_demux );
62 p_demux->p_sys->p_xml = NULL;
63 p_demux->p_sys->p_xml_reader = NULL;
67 /*****************************************************************************
68 * Deactivate: frees unused data
69 *****************************************************************************/
70 void Close_B4S( vlc_object_t *p_this )
72 demux_t *p_demux = (demux_t *)p_this;
73 demux_sys_t *p_sys = p_demux->p_sys;
75 free( p_sys->psz_prefix );
76 if( p_sys->p_xml_reader ) xml_ReaderDelete( p_sys->p_xml, p_sys->p_xml_reader );
77 if( p_sys->p_xml ) xml_Delete( p_sys->p_xml );
81 static int Demux( demux_t *p_demux )
83 demux_sys_t *p_sys = p_demux->p_sys;
87 xml_reader_t *p_xml_reader;
88 char *psz_elname = NULL;
90 input_item_t *p_input;
91 char *psz_mrl = NULL, *psz_name = NULL, *psz_genre = NULL;
92 char *psz_now = NULL, *psz_listeners = NULL, *psz_bitrate = NULL;
96 p_xml = p_sys->p_xml = xml_Create( p_demux );
97 if( !p_xml ) return -1;
99 psz_elname = stream_ReadLine( p_demux->s );
103 p_xml_reader = xml_ReaderCreate( p_xml, p_demux->s );
104 if( !p_xml_reader ) return -1;
105 p_sys->p_xml_reader = p_xml_reader;
108 /* check root node */
109 if( xml_ReaderRead( p_xml_reader ) != 1 )
111 msg_Err( p_demux, "invalid file (no root node)" );
115 if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
116 ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
117 strcmp( psz_elname, "WinampXML" ) )
119 msg_Err( p_demux, "invalid root node %i, %s",
120 xml_ReaderNodeType( p_xml_reader ), psz_elname );
126 /* root node should not have any attributes, and should only
127 * contain the "playlist node */
129 /* Skip until 1st child node */
130 while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 &&
131 xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM );
134 msg_Err( p_demux, "invalid file (no child node)" );
138 if( ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
139 strcmp( psz_elname, "playlist" ) )
141 msg_Err( p_demux, "invalid child node %s", psz_elname );
145 free( psz_elname ); psz_elname = NULL;
147 // Read the attributes
148 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
150 char *psz_name = xml_ReaderName( p_xml_reader );
151 char *psz_value = xml_ReaderValue( p_xml_reader );
152 if( !psz_name || !psz_value )
158 if( !strcmp( psz_name, "num_entries" ) )
160 msg_Dbg( p_demux, "playlist has %d entries", atoi(psz_value) );
162 else if( !strcmp( psz_name, "label" ) )
164 input_item_SetName( p_current_input, psz_value );
168 msg_Warn( p_demux, "stray attribute %s with value %s in element"
169 " 'playlist'", psz_name, psz_value );
175 while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 )
178 i_type = xml_ReaderNodeType( p_xml_reader );
186 case XML_READER_STARTELEM:
188 // Read the element name
190 psz_elname = xml_ReaderName( p_xml_reader );
191 if( !psz_elname ) return -1;
194 // Read the attributes
195 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
197 char *psz_name = xml_ReaderName( p_xml_reader );
198 char *psz_value = xml_ReaderValue( p_xml_reader );
199 if( !psz_name || !psz_value ) return -1;
200 if( !strcmp( psz_elname, "entry" ) &&
201 !strcmp( psz_name, "Playstring" ) )
203 psz_mrl = strdup( psz_value );
207 msg_Warn( p_demux, "unexpected attribure %s in element %s",
208 psz_name, psz_elname );
215 case XML_READER_TEXT:
217 char *psz_text = xml_ReaderValue( p_xml_reader );
218 if( IsWhitespace( psz_text ) )
223 if( !strcmp( psz_elname, "Name" ) )
225 psz_name = strdup( psz_text );
227 else if( !strcmp( psz_elname, "Genre" ) )
229 psz_genre = strdup( psz_text );
231 else if( !strcmp( psz_elname, "Nowplaying" ) )
233 psz_now = strdup( psz_text );
235 else if( !strcmp( psz_elname, "Listeners" ) )
237 psz_listeners = strdup( psz_text );
239 else if( !strcmp( psz_elname, "Bitrate" ) )
241 psz_bitrate = strdup( psz_text );
243 else if( !strcmp( psz_elname, "" ) )
249 msg_Warn( p_demux, "unexpected text in element '%s'",
256 case XML_READER_ENDELEM:
258 // Read the element name
260 psz_elname = xml_ReaderName( p_xml_reader );
261 if( !psz_elname ) return -1;
262 if( !strcmp( psz_elname, "entry" ) )
264 p_input = input_item_NewExt( p_demux, psz_mrl, psz_name,
267 input_item_SetNowPlaying( p_input, psz_now );
269 input_item_SetGenre( p_input, psz_genre );
271 msg_Err( p_demux, "Unsupported meta listeners" );
273 msg_Err( p_demux, "Unsupported meta bitrate" );
275 input_item_AddSubItem( p_current_input, p_input );
276 vlc_gc_decref( p_input );
277 FREENULL( psz_name );
279 FREENULL( psz_genre );
280 FREENULL( psz_bitrate );
281 FREENULL( psz_listeners );
285 psz_elname = strdup("");
294 msg_Warn( p_demux, "error while parsing data" );
299 HANDLE_PLAY_AND_RELEASE;
300 return 0; /* Needed for correct operation of go back */
303 static int Control( demux_t *p_demux, int i_query, va_list args )
305 VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
311 * Get a in-string pointer to the start of the next token from a
312 * string terminating the pointer returned by a previous call.
314 * \param psz_cur_string The string to search for the token from
315 * \return a pointer to withing psz_cur_string, or NULL if no token
317 * \note The returned pointer may contain more than one
318 * token, Run GetNextToken once more to terminate the token properly
320 static char *GetNextToken(char *psz_cur_string) {
321 while (*psz_cur_string && !isspace(*psz_cur_string))
323 if (!*psz_cur_string)
325 *psz_cur_string++ = '\0';
326 while (*psz_cur_string && isspace(*psz_cur_string))
328 return psz_cur_string;
332 static int IsWhitespace( char *psz_string )
336 if( *psz_string != ' ' && *psz_string != '\t' && *psz_string != '\r' &&
337 *psz_string != '\n' )