094b97e22397b8f7b2d82af20f433fd36001ac00
[vlc.git] / src / control / media_list_player.c
1 /*****************************************************************************
2  * media_list_player.c: libvlc new API media_list player functions
3  *****************************************************************************
4  * Copyright (C) 2007 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
8  *
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.
13  *
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.
18  *
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  *****************************************************************************/
23 #include "libvlc_internal.h"
24 #include <vlc/libvlc.h>
25 #include "media_list_path.h"
26
27 /*
28  * Private functions
29  */
30
31 /**************************************************************************
32  *       get_next_index (private)
33  *
34  * Simple next item fetcher.
35  **************************************************************************/
36 static libvlc_media_list_path_t
37 get_next_path( libvlc_media_list_player_t * p_mlp )
38 {
39     /* We are entered with libvlc_media_list_lock( p_mlp->p_list ) */
40     libvlc_media_list_path_t ret;
41     libvlc_media_list_t * p_parent_of_playing_item;
42     libvlc_media_list_t * p_sublist_of_playing_item;
43     p_sublist_of_playing_item = libvlc_media_list_sublist_at_path(
44                             p_mlp->p_mlist,
45                             p_mlp->current_playing_item_path );
46  
47     /* If item just gained a sublist just play it */
48     if( p_sublist_of_playing_item )
49     {
50         libvlc_media_list_release( p_sublist_of_playing_item );
51         return libvlc_media_list_path_copy_by_appending( p_mlp->current_playing_item_path, 0 );
52     }
53
54     /* Try to catch next element */
55     p_parent_of_playing_item = libvlc_media_list_parentlist_at_path(
56                             p_mlp->p_mlist,
57                             p_mlp->current_playing_item_path );
58
59     int deepness = libvlc_media_list_path_deepness( p_mlp->current_playing_item_path );
60     if( deepness < 1 || !p_parent_of_playing_item )
61         return NULL;
62
63     ret = libvlc_media_list_path_copy( p_mlp->current_playing_item_path );
64
65     while( ret[deepness-1] >= libvlc_media_list_count( p_parent_of_playing_item, NULL ) )
66     {
67         deepness--;
68         if( deepness <= 0 )
69         {
70             free( ret );
71             libvlc_media_list_release( p_parent_of_playing_item );
72             return NULL;
73         }
74         ret[deepness] = -1;
75         ret[deepness-1]++;
76         p_parent_of_playing_item  = libvlc_media_list_parentlist_at_path(
77                                         p_mlp->p_mlist,
78                                         ret );
79     }
80     libvlc_media_list_release( p_parent_of_playing_item );
81     return ret;
82 }
83
84 /**************************************************************************
85  *       media_instance_reached_end (private) (Event Callback)
86  **************************************************************************/
87 static void
88 media_instance_reached_end( const libvlc_event_t * p_event,
89                             void * p_user_data )
90 {
91     libvlc_media_list_player_t * p_mlp = p_user_data;
92     libvlc_media_instance_t * p_mi = p_event->p_obj;
93     libvlc_media_descriptor_t *p_md, * p_current_md;
94
95     p_md = libvlc_media_instance_get_media_descriptor( p_mi, NULL );
96     /* XXX: need if p_mlp->p_current_playing_index is beyond */
97     p_current_md = libvlc_media_list_item_at_path(
98                         p_mlp->p_mlist,
99                         p_mlp->current_playing_item_path );
100     if( p_md != p_current_md )
101     {
102         msg_Warn( p_mlp->p_libvlc_instance->p_libvlc_int,
103                   "We are not sync-ed with the media instance" );
104         libvlc_media_descriptor_release( p_md );
105         libvlc_media_descriptor_release( p_current_md );
106         return;
107     }
108     libvlc_media_descriptor_release( p_md );
109     libvlc_media_descriptor_release( p_current_md );
110     libvlc_media_list_player_next( p_mlp, NULL );
111 }
112
113 /**************************************************************************
114  *       playlist_item_deleted (private) (Event Callback)
115  **************************************************************************/
116 static void
117 mlist_item_deleted( const libvlc_event_t * p_event, void * p_user_data )
118 {
119     libvlc_media_descriptor_t * p_current_md;
120     libvlc_media_list_player_t * p_mlp = p_user_data;
121     libvlc_media_list_t * p_emitting_mlist = p_event->p_obj;
122     /* XXX: need if p_mlp->p_current_playing_index is beyond */
123     p_current_md = libvlc_media_list_item_at_path(
124                         p_mlp->p_mlist,
125                         p_mlp->current_playing_item_path );
126
127     if( p_event->u.media_list_item_deleted.item == p_current_md &&
128         p_emitting_mlist == p_mlp->p_mlist )
129     {
130         /* We are playing this item, we choose to stop */
131         libvlc_media_list_player_stop( p_mlp, NULL );
132     }
133 }
134
135 /**************************************************************************
136  *       install_playlist_observer (private)
137  **************************************************************************/
138 static void
139 install_playlist_observer( libvlc_media_list_player_t * p_mlp )
140 {
141     libvlc_event_attach( libvlc_media_list_event_manager( p_mlp->p_mlist, NULL ),
142             libvlc_MediaListItemDeleted, mlist_item_deleted, p_mlp, NULL );
143 }
144
145 /**************************************************************************
146  *       uninstall_playlist_observer (private)
147  **************************************************************************/
148 static void
149 uninstall_playlist_observer( libvlc_media_list_player_t * p_mlp )
150 {
151     libvlc_event_detach( libvlc_media_list_event_manager( p_mlp->p_mlist, NULL ),
152             libvlc_MediaListItemDeleted, mlist_item_deleted, p_mlp, NULL );
153 }
154
155 /**************************************************************************
156  *       install_media_instance_observer (private)
157  **************************************************************************/
158 static void
159 install_media_instance_observer( libvlc_media_list_player_t * p_mlp )
160 {
161     libvlc_event_attach( libvlc_media_instance_event_manager( p_mlp->p_mi, NULL ),
162                          libvlc_MediaInstanceReachedEnd,
163                           media_instance_reached_end, p_mlp, NULL );
164 }
165
166
167 /**************************************************************************
168  *       uninstall_media_instance_observer (private)
169  **************************************************************************/
170 static void
171 uninstall_media_instance_observer( libvlc_media_list_player_t * p_mlp )
172 {
173     libvlc_event_detach( libvlc_media_instance_event_manager( p_mlp->p_mi, NULL ),
174                          libvlc_MediaInstanceReachedEnd,
175                          media_instance_reached_end, p_mlp, NULL );
176 }
177
178 /**************************************************************************
179  *       set_current_playing_item (private)
180  *
181  * Playlist lock should be held
182  **************************************************************************/
183 static void
184 set_current_playing_item( libvlc_media_list_player_t * p_mlp,
185                           libvlc_media_list_path_t path,
186                           libvlc_exception_t * p_e )
187 {
188     libvlc_media_descriptor_t * p_md;
189     
190     p_md = libvlc_media_list_item_at_path( p_mlp->p_mlist, path ); 
191     vlc_mutex_lock( &p_mlp->object_lock );
192     
193     free( p_mlp->current_playing_item_path );
194     p_mlp->current_playing_item_path = path;
195
196     if( !p_md )
197     {
198         vlc_mutex_unlock( &p_mlp->object_lock );
199         return;
200     }
201
202     /* We are not interested in getting media_descriptor stop event now */
203     uninstall_media_instance_observer( p_mlp );
204     if( p_md->p_subitems && libvlc_media_list_count( p_md->p_subitems, NULL ) > 0 )
205     {
206         libvlc_media_descriptor_t * p_submd;
207         p_submd = libvlc_media_list_item_at_index( p_md->p_subitems, 0, NULL );
208         libvlc_media_instance_set_media_descriptor( p_mlp->p_mi, p_submd, NULL );
209         libvlc_media_descriptor_release( p_submd );
210     }
211     else
212         libvlc_media_instance_set_media_descriptor( p_mlp->p_mi, p_md, NULL );
213 //    wait_playing_state(); /* If we want to be synchronous */
214     install_media_instance_observer( p_mlp );
215
216     vlc_mutex_unlock( &p_mlp->object_lock );
217
218     libvlc_media_list_unlock( p_mlp->p_mlist );        
219     
220     libvlc_media_descriptor_release( p_md ); /* for libvlc_media_list_item_at_index */
221 }
222
223 /*
224  * Public libvlc functions
225  */
226
227 /**************************************************************************
228  *         new (Public)
229  **************************************************************************/
230 libvlc_media_list_player_t *
231 libvlc_media_list_player_new( libvlc_instance_t * p_instance,
232                               libvlc_exception_t * p_e )
233 {
234     (void)p_e;
235     libvlc_media_list_player_t * p_mlp;
236     p_mlp = malloc(sizeof(libvlc_media_list_player_t));
237     p_mlp->current_playing_item_path = NULL;
238     p_mlp->p_mi = NULL;
239     p_mlp->p_mlist = NULL;
240     vlc_mutex_init( p_instance->p_libvlc_int, &p_mlp->object_lock );
241     p_mlp->p_event_manager = libvlc_event_manager_new( p_mlp,
242                                                        p_instance,
243                                                        p_e );
244     libvlc_event_manager_register_event_type( p_mlp->p_event_manager,
245             libvlc_MediaListPlayerNextItemSet, p_e );
246
247     return p_mlp;
248 }
249
250 /**************************************************************************
251  *         release (Public)
252  **************************************************************************/
253 void libvlc_media_list_player_release( libvlc_media_list_player_t * p_mlp )
254 {
255     free(p_mlp);
256 }
257
258 /**************************************************************************
259  *        set_media_instance (Public)
260  **************************************************************************/
261 void libvlc_media_list_player_set_media_instance(
262                                      libvlc_media_list_player_t * p_mlp,
263                                      libvlc_media_instance_t * p_mi,
264                                      libvlc_exception_t * p_e )
265 {
266     vlc_mutex_lock( &p_mlp->object_lock );
267
268     if( p_mlp->p_mi )
269     {
270         uninstall_media_instance_observer( p_mlp );
271         libvlc_media_instance_release( p_mlp->p_mi );
272     }
273     libvlc_media_instance_retain( p_mi );
274     p_mlp->p_mi = p_mi;
275
276     install_media_instance_observer( p_mlp );
277
278     vlc_mutex_unlock( &p_mlp->object_lock );
279 }
280
281 /**************************************************************************
282  *       set_media_list (Public)
283  **************************************************************************/
284 void libvlc_media_list_player_set_media_list(
285                                      libvlc_media_list_player_t * p_mlp,
286                                      libvlc_media_list_t * p_mlist,
287                                      libvlc_exception_t * p_e )
288 {
289     vlc_mutex_lock( &p_mlp->object_lock );
290  
291     if( libvlc_media_list_player_is_playing( p_mlp, p_e ) )
292     {
293         libvlc_media_instance_stop( p_mlp->p_mi, p_e );
294         /* Don't bother if there was an error. */
295         libvlc_exception_clear( p_e );
296     }
297
298     if( p_mlp->p_mlist )
299     {
300         uninstall_playlist_observer( p_mlp );
301         libvlc_media_list_release( p_mlp->p_mlist );
302     }
303     libvlc_media_list_retain( p_mlist );
304     p_mlp->p_mlist = p_mlist;
305  
306     install_playlist_observer( p_mlp );
307
308     vlc_mutex_unlock( &p_mlp->object_lock );
309 }
310
311 /**************************************************************************
312  *        Play (Public)
313  **************************************************************************/
314 void libvlc_media_list_player_play( libvlc_media_list_player_t * p_mlp,
315                                   libvlc_exception_t * p_e )
316 {
317     if( !p_mlp->current_playing_item_path )
318     {
319         libvlc_media_list_player_next( p_mlp, p_e );
320         return; /* Will set to play */
321     }
322
323     libvlc_media_instance_play( p_mlp->p_mi, p_e );
324 }
325
326
327 /**************************************************************************
328  *        Pause (Public)
329  **************************************************************************/
330 void libvlc_media_list_player_pause( libvlc_media_list_player_t * p_mlp,
331                                      libvlc_exception_t * p_e )
332 {
333     if( !p_mlp->p_mi )
334         return;
335     libvlc_media_instance_pause( p_mlp->p_mi, p_e );
336 }
337
338 /**************************************************************************
339  *        is_playing (Public)
340  **************************************************************************/
341 int libvlc_media_list_player_is_playing( libvlc_media_list_player_t * p_mlp,
342                                          libvlc_exception_t * p_e )
343 {
344     libvlc_state_t state = libvlc_media_instance_get_state( p_mlp->p_mi, p_e );
345     return (state == libvlc_Opening) || (state == libvlc_Buffering) ||
346            (state == libvlc_Playing);
347 }
348
349 /**************************************************************************
350  *        State (Public)
351  **************************************************************************/
352 libvlc_state_t
353 libvlc_media_list_player_get_state( libvlc_media_list_player_t * p_mlp,
354                                     libvlc_exception_t * p_e )
355 {
356     if( !p_mlp->p_mi )
357         return libvlc_Stopped;
358     return libvlc_media_instance_get_state( p_mlp->p_mi, p_e );
359 }
360
361 /**************************************************************************
362  *        Play item at index (Public)
363  **************************************************************************/
364 void libvlc_media_list_player_play_item_at_index(
365                         libvlc_media_list_player_t * p_mlp,
366                         int i_index,
367                         libvlc_exception_t * p_e )
368 {
369     set_current_playing_item( p_mlp, libvlc_media_list_path_with_root_index(i_index), p_e );
370
371     if( libvlc_exception_raised( p_e ) )
372         return;
373
374     /* Send the next item event */
375     libvlc_event_t event;
376     event.type = libvlc_MediaListPlayerNextItemSet;
377     libvlc_event_send( p_mlp->p_event_manager, &event );
378
379     libvlc_media_instance_play( p_mlp->p_mi, p_e );
380 }
381
382 /**************************************************************************
383  *        Play item (Public)
384  **************************************************************************/
385 void libvlc_media_list_player_play_item(
386                         libvlc_media_list_player_t * p_mlp,
387                         libvlc_media_descriptor_t * p_md,
388                         libvlc_exception_t * p_e )
389 {
390     libvlc_media_list_path_t path = libvlc_media_list_path_of_item( p_mlp->p_mlist, p_md );
391     if( !path )
392     {
393         libvlc_exception_raise( p_e, "No such item in media list" );
394         return;
395     }
396     set_current_playing_item( p_mlp, path, p_e );
397
398     if( libvlc_exception_raised( p_e ) )
399         return;
400
401     libvlc_media_instance_play( p_mlp->p_mi, p_e );
402 }
403
404 /**************************************************************************
405  *       Stop (Public)
406  **************************************************************************/
407 void libvlc_media_list_player_stop( libvlc_media_list_player_t * p_mlp,
408                                     libvlc_exception_t * p_e )
409 {
410     libvlc_media_instance_stop( p_mlp->p_mi, p_e );
411
412     vlc_mutex_lock( &p_mlp->object_lock );
413     free( p_mlp->current_playing_item_path );
414     p_mlp->current_playing_item_path = NULL;
415     vlc_mutex_unlock( &p_mlp->object_lock );
416 }
417
418 /**************************************************************************
419  *       Next (Public)
420  **************************************************************************/
421 void libvlc_media_list_player_next( libvlc_media_list_player_t * p_mlp,
422                                     libvlc_exception_t * p_e )
423 {    
424     libvlc_media_list_path_t path;
425     
426     libvlc_media_list_lock( p_mlp->p_mlist );
427
428     path = get_next_path( p_mlp );
429
430     if( !path )
431     {
432         libvlc_media_list_unlock( p_mlp->p_mlist );
433         libvlc_exception_raise( p_e, "No more element to play" );
434         libvlc_media_list_player_stop( p_mlp, p_e );
435         return;
436     }
437
438     set_current_playing_item( p_mlp, path, p_e );
439     
440     libvlc_media_instance_play( p_mlp->p_mi, p_e );
441
442     libvlc_media_list_unlock( p_mlp->p_mlist );
443
444     /* Send the next item event */
445     libvlc_event_t event;
446     event.type = libvlc_MediaListPlayerNextItemSet;
447     libvlc_event_send( p_mlp->p_event_manager, &event);
448 }