1 /*****************************************************************************
2 * intf_playlist.c : Playlist management functions
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: intf_playlist.c,v 1.6 2001/05/15 14:49:48 stef Exp $
7 * Authors: Samuel Hocevar <sam@zoy.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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
27 #include <stdlib.h> /* free(), strtol() */
28 #include <stdio.h> /* sprintf() */
29 #include <string.h> /* strerror() */
30 #include <errno.h> /* ENOMEM */
36 #include "intf_playlist.h"
40 /*****************************************************************************
42 *****************************************************************************/
43 static void NextItem( playlist_t * p_playlist );
45 /*****************************************************************************
46 * intf_PlaylistCreate: create playlist
47 *****************************************************************************
48 * Create a playlist structure.
49 *****************************************************************************/
50 playlist_t * intf_PlaylistCreate ( void )
52 playlist_t *p_playlist;
54 /* Allocate structure */
55 p_playlist = malloc( sizeof( playlist_t ) );
58 intf_ErrMsg( "intf error: couldn't create playlist (%s)",
66 /*****************************************************************************
67 * intf_PlaylistInit: initialize playlist
68 *****************************************************************************
69 * Initialize a playlist structure.
70 *****************************************************************************/
71 void intf_PlaylistInit ( playlist_t * p_playlist )
73 vlc_mutex_init( &p_playlist->change_lock );
75 p_playlist->i_index = -1; /* -1 means we are not playing anything yet */
76 p_playlist->i_size = 0;
78 p_playlist->i_mode = PLAYLIST_FORWARD;
79 p_playlist->i_seed = 0;
80 p_playlist->b_stopped = 0;
82 /* There is no current item */
83 p_playlist->current.i_type = 0;
84 p_playlist->current.i_status = 0;
85 p_playlist->current.psz_name = NULL;
87 /* The playlist is empty */
88 p_playlist->p_item = NULL;
90 intf_WarnMsg( 3, "intf: playlist initialized" );
93 /*****************************************************************************
94 * intf_PlaylistAdd: add an item to the playlist
95 *****************************************************************************
96 * Add an item to the playlist at position i_pos. If i_pos is PLAYLIST_END,
97 * add it at the end regardless of the playlist current size.
98 *****************************************************************************/
99 int intf_PlaylistAdd( playlist_t * p_playlist, int i_pos,
100 const char * psz_item )
103 playlist_item_t * p_item;
105 vlc_mutex_lock( &p_playlist->change_lock );
107 if( i_pos == PLAYLIST_END )
109 i_pos = p_playlist->i_size;
111 else if( i_pos > p_playlist->i_size )
113 intf_ErrMsg( "intf error: inserting item beyond playlist size" );
114 vlc_mutex_unlock( &p_playlist->change_lock );
118 /* Increment playlist size */
119 p_playlist->i_size++;
120 p_playlist->p_item = realloc( p_playlist->p_item,
121 p_playlist->i_size * sizeof( playlist_item_t ) );
123 /* Move second place of the playlist to make room for new item */
124 for( i_index = p_playlist->i_size - 1; i_index > i_pos; i_index-- )
126 p_playlist->p_item[ i_index ] = p_playlist->p_item[ i_index - 1 ];
129 /* Insert the new item */
130 p_item = &p_playlist->p_item[ i_pos ];
133 p_item->i_status = 0;
134 p_item->psz_name = strdup( psz_item );
136 intf_WarnMsg( 3, "intf: added `%s' to playlist", psz_item );
138 vlc_mutex_unlock( &p_playlist->change_lock );
143 /*****************************************************************************
144 * intf_PlaylistNext: switch to next playlist item
145 *****************************************************************************
146 * Switch to the next item of the playlist. If there is no next item, the
147 * position of the resulting item is set to -1.
148 *****************************************************************************/
149 void intf_PlaylistNext( playlist_t * p_playlist )
151 vlc_mutex_lock( &p_playlist->change_lock );
153 NextItem( p_playlist );
155 vlc_mutex_unlock( &p_playlist->change_lock );
158 /*****************************************************************************
159 * intf_PlaylistPrev: switch to previous playlist item
160 *****************************************************************************
161 * Switch to the previous item of the playlist. If there is no previous
162 * item, the position of the resulting item is set to -1.
163 *****************************************************************************/
164 void intf_PlaylistPrev( playlist_t * p_playlist )
166 vlc_mutex_lock( &p_playlist->change_lock );
167 p_playlist->i_mode = -p_playlist->i_mode;
169 NextItem( p_playlist );
171 p_playlist->i_mode = -p_playlist->i_mode;
172 vlc_mutex_unlock( &p_playlist->change_lock );
175 /*****************************************************************************
176 * intf_PlaylistDelete: delete an item from the playlist
177 *****************************************************************************
178 * Delete the item in the playlist with position i_pos.
179 *****************************************************************************/
180 int intf_PlaylistDelete( playlist_t * p_playlist, int i_pos )
185 vlc_mutex_lock( &p_playlist->change_lock );
187 if( !p_playlist->i_size || i_pos >= p_playlist->i_size )
189 intf_ErrMsg( "intf error: deleting item beyond playlist size" );
190 vlc_mutex_unlock( &p_playlist->change_lock );
194 /* Store the location of the item's name */
195 psz_name = p_playlist->p_item[ i_pos ].psz_name;
197 /* Fill the room by moving the next items */
198 for( i_index = i_pos; i_index < p_playlist->i_size - 1; i_index++ )
200 p_playlist->p_item[ i_index ] = p_playlist->p_item[ i_index + 1 ];
203 if( i_pos < p_playlist->i_index )
204 p_playlist->i_index--;
207 /* Decrement playlist size */
208 p_playlist->i_size--;
209 p_playlist->p_item = realloc( p_playlist->p_item,
210 p_playlist->i_size * sizeof( playlist_item_t ) );
212 intf_WarnMsg( 3, "intf: removed `%s' from playlist", psz_name );
215 /* Delete the item */
218 vlc_mutex_unlock( &p_playlist->change_lock );
223 /*****************************************************************************
224 * intf_PlaylistDestroy: destroy the playlist
225 *****************************************************************************
226 * Delete all items in the playlist and free the playlist structure.
227 *****************************************************************************/
228 void intf_PlaylistDestroy( playlist_t * p_playlist )
232 for( i_index = p_playlist->i_size - 1; p_playlist->i_size; i_index-- )
234 intf_PlaylistDelete( p_playlist, i_index );
237 vlc_mutex_destroy( &p_playlist->change_lock );
239 if( p_playlist->current.psz_name != NULL )
241 free( p_playlist->current.psz_name );
246 intf_WarnMsg( 3, "intf: playlist destroyed" );
249 /*****************************************************************************
250 * intf_PlaylistJumpto: go to a specified position in playlist.
251 *****************************************************************************/
252 void intf_PlaylistJumpto( playlist_t * p_playlist , int i_pos)
254 vlc_mutex_lock( &p_playlist->change_lock );
256 p_playlist->i_index = i_pos;
258 if( p_playlist->i_index != -1 )
260 if( p_playlist->current.psz_name != NULL )
262 free( p_playlist->current.psz_name );
265 p_playlist->current = p_playlist->p_item[ p_playlist->i_index ];
266 p_playlist->current.psz_name
267 = strdup( p_playlist->current.psz_name );
270 p_main->p_playlist->b_stopped = 0;
272 vlc_mutex_unlock( &p_playlist->change_lock );
276 /*****************************************************************************
277 * Following functions are local
278 *****************************************************************************/
280 /*****************************************************************************
281 * NextItem: select next playlist item
282 *****************************************************************************
283 * This function copies the next playlist item to the current structure,
284 * depending on the playlist browsing mode.
285 *****************************************************************************/
286 static void NextItem( playlist_t * p_playlist )
288 if( !p_playlist->i_size )
290 p_playlist->i_index = -1;
294 switch( p_playlist->i_mode )
296 case PLAYLIST_FORWARD:
297 p_playlist->i_index++;
298 if( p_playlist->i_index > p_playlist->i_size - 1 )
300 p_playlist->i_index = -1;
304 case PLAYLIST_FORWARD_LOOP:
305 p_playlist->i_index++;
306 if( p_playlist->i_index > p_playlist->i_size - 1 )
308 p_playlist->i_index = 0;
312 case PLAYLIST_BACKWARD:
313 p_playlist->i_index--;
314 if( p_playlist->i_index < 0 )
316 p_playlist->i_index = -1;
320 case PLAYLIST_BACKWARD_LOOP:
321 p_playlist->i_index--;
322 if( p_playlist->i_index < 0 )
324 p_playlist->i_index = p_playlist->i_size - 1;
328 case PLAYLIST_REPEAT_CURRENT:
329 /* Just repeat what we were doing */
330 if( p_playlist->i_index < 0
331 || p_playlist->i_index > p_playlist->i_size - 1 )
333 p_playlist->i_index = 0;
337 case PLAYLIST_RANDOM:
339 p_playlist->i_index++;
340 if( p_playlist->i_index > p_playlist->i_size - 1 )
342 p_playlist->i_index = 0;
347 /* Duplicate the playlist entry */
348 if( p_playlist->i_index != -1 )
350 if( p_playlist->current.psz_name != NULL )
352 free( p_playlist->current.psz_name );
354 p_playlist->current = p_playlist->p_item[ p_playlist->i_index ];
355 p_playlist->current.psz_name
356 = strdup( p_playlist->current.psz_name );