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 *****************************************************************************/
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)" );
112 vlc_object_release( p_playlist );
116 if( xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM ||
117 ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
118 strcmp( psz_elname, "WinampXML" ) )
120 msg_Err( p_demux, "invalid root node %i, %s",
121 xml_ReaderNodeType( p_xml_reader ), psz_elname );
123 vlc_object_release( p_playlist );
128 /* root node should not have any attributes, and should only
129 * contain the "playlist node */
131 /* Skip until 1st child node */
132 while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 &&
133 xml_ReaderNodeType( p_xml_reader ) != XML_READER_STARTELEM );
136 msg_Err( p_demux, "invalid file (no child node)" );
140 if( ( psz_elname = xml_ReaderName( p_xml_reader ) ) == NULL ||
141 strcmp( psz_elname, "playlist" ) )
143 msg_Err( p_demux, "invalid child node %s", psz_elname );
147 free( psz_elname ); psz_elname = 0;
149 // Read the attributes
150 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
152 char *psz_name = xml_ReaderName( p_xml_reader );
153 char *psz_value = xml_ReaderValue( p_xml_reader );
154 if( !psz_name || !psz_value ) return -1;
155 if( !strcmp( psz_name, "num_entries" ) )
157 msg_Dbg( p_demux, "playlist has %d entries", atoi(psz_value) );
159 else if( !strcmp( psz_name, "label" ) )
161 input_item_SetName( p_current_input, psz_value );
165 msg_Warn( p_demux, "stray attribute %s with value %s in element"
166 " 'playlist'", psz_name, psz_value );
172 while( (i_ret = xml_ReaderRead( p_xml_reader )) == 1 )
175 i_type = xml_ReaderNodeType( p_xml_reader );
183 case XML_READER_STARTELEM:
185 // Read the element name
187 psz_elname = xml_ReaderName( p_xml_reader );
188 if( !psz_elname ) return -1;
191 // Read the attributes
192 while( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
194 char *psz_name = xml_ReaderName( p_xml_reader );
195 char *psz_value = xml_ReaderValue( p_xml_reader );
196 if( !psz_name || !psz_value ) return -1;
197 if( !strcmp( psz_elname, "entry" ) &&
198 !strcmp( psz_name, "Playstring" ) )
200 psz_mrl = strdup( psz_value );
204 msg_Warn( p_demux, "unexpected attribure %s in element %s",
205 psz_name, psz_elname );
212 case XML_READER_TEXT:
214 char *psz_text = xml_ReaderValue( p_xml_reader );
215 if( IsWhitespace( psz_text ) )
220 if( !strcmp( psz_elname, "Name" ) )
222 psz_name = strdup( psz_text );
224 else if( !strcmp( psz_elname, "Genre" ) )
226 psz_genre = strdup( psz_text );
228 else if( !strcmp( psz_elname, "Nowplaying" ) )
230 psz_now = strdup( psz_text );
232 else if( !strcmp( psz_elname, "Listeners" ) )
234 psz_listeners = strdup( psz_text );
236 else if( !strcmp( psz_elname, "Bitrate" ) )
238 psz_bitrate = strdup( psz_text );
240 else if( !strcmp( psz_elname, "" ) )
246 msg_Warn( p_demux, "unexpected text in element '%s'",
253 case XML_READER_ENDELEM:
255 // Read the element name
257 psz_elname = xml_ReaderName( p_xml_reader );
258 if( !psz_elname ) return -1;
259 if( !strcmp( psz_elname, "entry" ) )
261 p_input = input_ItemNewExt( p_playlist, psz_mrl, psz_name,
264 input_item_SetNowPlaying( p_input, psz_now );
266 input_item_SetGenre( p_input, psz_genre );
268 msg_Err( p_playlist, "Unsupported meta listeners" );
270 msg_Err( p_playlist, "Unsupported meta bitrate" );
272 input_ItemAddSubItem( p_current_input, p_input );
273 vlc_gc_decref( p_input );
274 FREENULL( psz_name );
276 FREENULL( psz_genre );
277 FREENULL( psz_bitrate );
278 FREENULL( psz_listeners );
282 psz_elname = strdup("");
291 msg_Warn( p_demux, "error while parsing data" );
294 HANDLE_PLAY_AND_RELEASE;
295 return 0; /* Needed for correct operation of go back */
298 static int Control( demux_t *p_demux, int i_query, va_list args )
300 VLC_UNUSED(p_demux); VLC_UNUSED(i_query); VLC_UNUSED(args);
306 * Get a in-string pointer to the start of the next token from a
307 * string terminating the pointer returned by a previous call.
309 * \param psz_cur_string The string to search for the token from
310 * \return a pointer to withing psz_cur_string, or NULL if no token
312 * \note The returned pointer may contain more than one
313 * token, Run GetNextToken once more to terminate the token properly
315 static char *GetNextToken(char *psz_cur_string) {
316 while (*psz_cur_string && !isspace(*psz_cur_string))
318 if (!*psz_cur_string)
320 *psz_cur_string++ = '\0';
321 while (*psz_cur_string && isspace(*psz_cur_string))
323 return psz_cur_string;
327 static int IsWhitespace( char *psz_string )
331 if( *psz_string != ' ' && *psz_string != '\t' && *psz_string != '\r' &&
332 *psz_string != '\n' )