1 /*****************************************************************************
2 * media_instance.c: Libvlc API Media Instance management functions
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
7 * Authors: Clément Stenac <zorglub@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 #include <vlc/libvlc.h>
25 #include <vlc_demux.h>
26 #include <vlc_input.h>
27 #include "libvlc_internal.h"
31 * Release the associated input thread
33 * Object lock is NOT held.
35 static void release_input_thread( libvlc_media_instance_t *p_mi )
37 input_thread_t *p_input_thread;
38 vlc_bool_t should_destroy;
40 if( !p_mi || p_mi->i_input_id == -1 )
43 p_input_thread = (input_thread_t*)vlc_object_get(
44 p_mi->p_libvlc_instance->p_libvlc_int,
47 p_mi->i_input_id = -1;
52 /* release for previous vlc_object_get */
53 vlc_object_release( p_input_thread );
55 /* release for initial p_input_thread yield (see _new()) */
56 vlc_object_release( p_input_thread );
58 /* No one is tracking this input_thread appart us. Destroy it */
59 if( p_mi->b_own_its_input_thread )
61 /* We owned this one */
62 input_StopThread( p_input_thread );
63 var_Destroy( p_input_thread, "drawable" );
64 input_DestroyThread( p_input_thread );
68 /* XXX: hack the playlist doesn't retain the input thread,
69 * so we did it for the playlist (see _new_from_input_thread),
70 * revert that here. This will be deleted with the playlist API */
71 vlc_object_release( p_input_thread );
76 * Retrieve the input thread. Be sure to release the object
77 * once you are done with it. (libvlc Internal)
79 * Object lock is held.
81 input_thread_t *libvlc_get_input_thread( libvlc_media_instance_t *p_mi,
82 libvlc_exception_t *p_e )
84 input_thread_t *p_input_thread;
86 vlc_mutex_lock( &p_mi->object_lock );
88 if( !p_mi || p_mi->i_input_id == -1 )
90 vlc_mutex_unlock( &p_mi->object_lock );
91 RAISENULL( "Input is NULL" );
94 p_input_thread = (input_thread_t*)vlc_object_get(
95 p_mi->p_libvlc_instance->p_libvlc_int,
99 vlc_mutex_unlock( &p_mi->object_lock );
100 RAISENULL( "Input does not exist" );
103 vlc_mutex_unlock( &p_mi->object_lock );
104 return p_input_thread;
108 * input_state_changed (Private) (input var "state" Callback)
111 input_state_changed( vlc_object_t * p_this, char const * psz_cmd,
112 vlc_value_t oldval, vlc_value_t newval,
115 libvlc_media_instance_t * p_mi = p_userdata;
116 libvlc_event_t event;
118 if( newval.i_int == oldval.i_int )
119 return VLC_SUCCESS; /* No change since last time, don't propagate */
121 switch ( newval.i_int )
124 event.type = libvlc_MediaInstanceReachedEnd;
127 event.type = libvlc_MediaInstancePaused;
130 event.type = libvlc_MediaInstancePlayed;
136 libvlc_event_send( p_mi->p_event_manager, &event );
141 * input_position_changed (Private) (input var "intf-change" Callback)
144 input_position_changed( vlc_object_t * p_this, char const * psz_cmd,
145 vlc_value_t oldval, vlc_value_t newval,
148 libvlc_media_instance_t * p_mi = p_userdata;
151 if (!strcmp(psz_cmd, "intf" /* "-change" no need to go further */))
153 input_thread_t * p_input = (input_thread_t *)p_this;
154 var_Get( p_input, "position", &val );
156 if ((val.i_time % I64C(500000)) != 0)
157 return VLC_SUCCESS; /* No need to have a better precision */
158 var_Get( p_input, "state", &val );
160 if( val.i_int != PLAYING_S )
161 return VLC_SUCCESS; /* Don't send the position while stopped */
164 val.i_time = newval.i_time;
166 libvlc_event_t event;
167 event.type = libvlc_MediaInstancePositionChanged;
168 event.u.media_instance_position_changed.new_position = val.i_time;
170 libvlc_event_send( p_mi->p_event_manager, &event );
174 /**************************************************************************
175 * Create a Media Instance object
176 **************************************************************************/
177 libvlc_media_instance_t *
178 libvlc_media_instance_new( libvlc_instance_t * p_libvlc_instance,
179 libvlc_exception_t * p_e )
181 libvlc_media_instance_t * p_mi;
183 if( !p_libvlc_instance )
185 libvlc_exception_raise( p_e, "invalid libvlc instance" );
189 p_mi = malloc( sizeof(libvlc_media_instance_t) );
192 p_mi->p_libvlc_instance = p_libvlc_instance;
193 p_mi->i_input_id = -1;
194 /* refcount strategy:
195 * - All items created by _new start with a refcount set to 1
196 * - Accessor _release decrease the refcount by 1, if after that
197 * operation the refcount is 0, the object is destroyed.
198 * - Accessor _retain increase the refcount by 1 (XXX: to implement) */
199 p_mi->i_refcount = 1;
200 p_mi->b_own_its_input_thread = VLC_TRUE;
201 /* object_lock strategy:
202 * - No lock held in constructor
203 * - Lock when accessing all variable this lock is held
204 * - Lock when attempting to destroy the object the lock is also held */
205 vlc_mutex_init( p_mi->p_libvlc_instance->p_libvlc_int,
206 &p_mi->object_lock );
207 p_mi->p_event_manager = libvlc_event_manager_new( p_mi,
208 p_libvlc_instance, p_e );
209 if( libvlc_exception_raised( p_e ) )
215 libvlc_event_manager_register_event_type( p_mi->p_event_manager,
216 libvlc_MediaInstanceReachedEnd, p_e );
221 /**************************************************************************
222 * Create a Media Instance object with a media descriptor
223 **************************************************************************/
224 libvlc_media_instance_t *
225 libvlc_media_instance_new_from_media_descriptor(
226 libvlc_media_descriptor_t * p_md,
227 libvlc_exception_t *p_e )
229 libvlc_media_instance_t * p_mi;
230 p_mi = libvlc_media_instance_new( p_md->p_libvlc_instance, p_e );
235 libvlc_media_descriptor_retain( p_md );
241 /**************************************************************************
242 * Create a new media instance object from an input_thread (Libvlc Internal)
243 **************************************************************************/
244 libvlc_media_instance_t * libvlc_media_instance_new_from_input_thread(
245 struct libvlc_instance_t *p_libvlc_instance,
246 input_thread_t *p_input,
247 libvlc_exception_t *p_e )
249 libvlc_media_instance_t * p_mi;
253 libvlc_exception_raise( p_e, "invalid input thread" );
257 p_mi = libvlc_media_instance_new( p_libvlc_instance, p_e );
262 p_mi->p_md = libvlc_media_descriptor_new_from_input_item(
264 input_GetItem( p_input ), p_e );
268 libvlc_media_instance_destroy( p_mi );
272 p_mi->i_input_id = p_input->i_object_id;
273 p_mi->b_own_its_input_thread = VLC_FALSE;
275 /* will be released in media_instance_release() */
276 vlc_object_yield( p_input );
278 /* XXX: Hack as the playlist doesn't yield the input thread we retain
279 * the input for the playlist. (see corresponding hack in _release) */
280 vlc_object_yield( p_input );
285 /**************************************************************************
286 * Destroy a Media Instance object (libvlc internal)
288 * Warning: No lock held here, but hey, this is internal.
289 **************************************************************************/
290 void libvlc_media_instance_destroy( libvlc_media_instance_t *p_mi )
292 input_thread_t *p_input_thread;
293 libvlc_exception_t p_e;
295 libvlc_exception_init( &p_e );
300 p_input_thread = libvlc_get_input_thread( p_mi, &p_e );
302 if( libvlc_exception_raised( &p_e ) )
304 libvlc_event_manager_release( p_mi->p_event_manager );
306 return; /* no need to worry about no input thread */
308 vlc_mutex_destroy( &p_mi->object_lock );
310 input_DestroyThread( p_input_thread );
312 libvlc_media_descriptor_release( p_mi->p_md );
317 /**************************************************************************
318 * Release a Media Instance object
319 **************************************************************************/
320 void libvlc_media_instance_release( libvlc_media_instance_t *p_mi )
325 vlc_mutex_lock( &p_mi->object_lock );
329 if( p_mi->i_refcount > 0 )
331 vlc_mutex_unlock( &p_mi->object_lock );
334 vlc_mutex_unlock( &p_mi->object_lock );
335 vlc_mutex_destroy( &p_mi->object_lock );
337 libvlc_event_manager_release( p_mi->p_event_manager );
339 release_input_thread( p_mi );
341 libvlc_media_descriptor_release( p_mi->p_md );
346 /**************************************************************************
347 * Retain a Media Instance object
348 **************************************************************************/
349 void libvlc_media_instance_retain( libvlc_media_instance_t *p_mi )
356 /**************************************************************************
357 * Set the Media descriptor associated with the instance
358 **************************************************************************/
359 void libvlc_media_instance_set_media_descriptor(
360 libvlc_media_instance_t *p_mi,
361 libvlc_media_descriptor_t *p_md,
362 libvlc_exception_t *p_e )
369 vlc_mutex_lock( &p_mi->object_lock );
371 release_input_thread( p_mi );
373 libvlc_media_descriptor_release( p_mi->p_md );
378 vlc_mutex_unlock( &p_mi->object_lock );
379 return; /* It is ok to pass a NULL md */
382 libvlc_media_descriptor_retain( p_md );
385 /* The policy here is to ignore that we were created using a different
386 * libvlc_instance, because we don't really care */
387 p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
389 vlc_mutex_unlock( &p_mi->object_lock );
392 /**************************************************************************
393 * Get the Media descriptor associated with the instance
394 **************************************************************************/
395 libvlc_media_descriptor_t *
396 libvlc_media_instance_get_media_descriptor(
397 libvlc_media_instance_t *p_mi,
398 libvlc_exception_t *p_e )
405 libvlc_media_descriptor_retain( p_mi->p_md );
409 /**************************************************************************
410 * Get the event Manager
411 **************************************************************************/
412 libvlc_event_manager_t *
413 libvlc_media_instance_event_manager(
414 libvlc_media_instance_t *p_mi,
415 libvlc_exception_t *p_e )
419 return p_mi->p_event_manager;
422 /**************************************************************************
424 **************************************************************************/
425 void libvlc_media_instance_play( libvlc_media_instance_t *p_mi,
426 libvlc_exception_t *p_e )
428 input_thread_t * p_input_thread;
430 if( (p_input_thread = libvlc_get_input_thread( p_mi, p_e )) )
432 /* A thread alread exists, send it a play message */
433 input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
434 vlc_object_release( p_input_thread );
438 /* Ignore previous exception */
439 libvlc_exception_clear( p_e );
441 vlc_mutex_lock( &p_mi->object_lock );
445 libvlc_exception_raise( p_e, "no associated media descriptor" );
446 vlc_mutex_unlock( &p_mi->object_lock );
450 p_input_thread = input_CreateThread( p_mi->p_libvlc_instance->p_libvlc_int,
451 p_mi->p_md->p_input_item );
452 p_mi->i_input_id = p_input_thread->i_object_id;
457 val.i_int = p_mi->drawable;
458 var_Create( p_input_thread, "drawable", VLC_VAR_DOINHERIT );
459 var_Set( p_input_thread, "drawable", val );
461 var_AddCallback( p_input_thread, "state", input_state_changed, p_mi );
462 var_AddCallback( p_input_thread, "intf-change", input_position_changed, p_mi );
464 /* will be released in media_instance_release() */
465 vlc_object_yield( p_input_thread );
467 vlc_mutex_unlock( &p_mi->object_lock );
470 /**************************************************************************
472 **************************************************************************/
473 void libvlc_media_instance_pause( libvlc_media_instance_t *p_mi,
474 libvlc_exception_t *p_e )
476 input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi, p_e );
478 if( !p_input_thread )
481 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
482 vlc_object_release( p_input_thread );
485 /**************************************************************************
487 **************************************************************************/
488 void libvlc_media_instance_stop( libvlc_media_instance_t *p_mi,
489 libvlc_exception_t *p_e )
491 //libvlc_exception_raise( p_e, "Not implemented" );
494 /**************************************************************************
496 **************************************************************************/
497 void libvlc_media_instance_set_drawable( libvlc_media_instance_t *p_mi,
498 libvlc_drawable_t drawable,
499 libvlc_exception_t *p_e )
501 p_mi->drawable = drawable;
504 /**************************************************************************
505 * Getters for stream information
506 **************************************************************************/
507 vlc_int64_t libvlc_media_instance_get_length(
508 libvlc_media_instance_t *p_mi,
509 libvlc_exception_t *p_e )
511 input_thread_t *p_input_thread;
514 p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
515 if( !p_input_thread )
518 var_Get( p_input_thread, "length", &val );
519 vlc_object_release( p_input_thread );
521 return (val.i_time+500LL)/1000LL;
524 vlc_int64_t libvlc_media_instance_get_time(
525 libvlc_media_instance_t *p_mi,
526 libvlc_exception_t *p_e )
528 input_thread_t *p_input_thread;
531 p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
532 if( !p_input_thread )
535 var_Get( p_input_thread , "time", &val );
536 vlc_object_release( p_input_thread );
537 return (val.i_time+500LL)/1000LL;
540 void libvlc_media_instance_set_time(
541 libvlc_media_instance_t *p_mi,
543 libvlc_exception_t *p_e )
545 input_thread_t *p_input_thread;
548 p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
549 if( !p_input_thread )
552 value.i_time = time*1000LL;
553 var_Set( p_input_thread, "time", value );
554 vlc_object_release( p_input_thread );
557 void libvlc_media_instance_set_position(
558 libvlc_media_instance_t *p_mi,
560 libvlc_exception_t *p_e )
562 input_thread_t *p_input_thread;
564 val.f_float = position;
566 p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
567 if( !p_input_thread )
570 var_Set( p_input_thread, "position", val );
571 vlc_object_release( p_input_thread );
574 float libvlc_media_instance_get_position(
575 libvlc_media_instance_t *p_mi,
576 libvlc_exception_t *p_e )
578 input_thread_t *p_input_thread;
581 p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
582 if( !p_input_thread )
585 var_Get( p_input_thread, "position", &val );
586 vlc_object_release( p_input_thread );
591 float libvlc_media_instance_get_fps(
592 libvlc_media_instance_t *p_mi,
593 libvlc_exception_t *p_e)
595 input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
600 if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
602 vlc_object_release( p_input_thread );
607 vlc_bool_t libvlc_media_instance_will_play(
608 libvlc_media_instance_t *p_mi,
609 libvlc_exception_t *p_e)
611 input_thread_t *p_input_thread =
612 libvlc_get_input_thread ( p_mi, p_e);
613 if ( !p_input_thread )
616 if ( !p_input_thread->b_die && !p_input_thread->b_dead )
618 vlc_object_release( p_input_thread );
621 vlc_object_release( p_input_thread );
625 void libvlc_media_instance_set_rate(
626 libvlc_media_instance_t *p_mi,
628 libvlc_exception_t *p_e )
630 input_thread_t *p_input_thread;
634 RAISEVOID( "Rate value is invalid" );
636 val.i_int = 1000.0f/rate;
638 p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
639 if ( !p_input_thread )
642 var_Set( p_input_thread, "rate", val );
643 vlc_object_release( p_input_thread );
646 float libvlc_media_instance_get_rate(
647 libvlc_media_instance_t *p_mi,
648 libvlc_exception_t *p_e )
650 input_thread_t *p_input_thread;
653 p_input_thread = libvlc_get_input_thread ( p_mi, p_e);
654 if ( !p_input_thread )
657 var_Get( p_input_thread, "rate", &val );
658 vlc_object_release( p_input_thread );
660 return (float)1000.0f/val.i_int;
663 static libvlc_state_t vlc_to_libvlc_state[] =
665 [INIT_S] = libvlc_Opening,
666 [OPENING_S] = libvlc_Opening,
667 [BUFFERING_S] = libvlc_Buffering,
668 [PLAYING_S] = libvlc_Playing,
669 [PAUSE_S] = libvlc_Paused,
670 [END_S] = libvlc_Ended,
671 [ERROR_S] = libvlc_Error,
674 libvlc_state_t libvlc_media_instance_get_state(
675 libvlc_media_instance_t *p_mi,
676 libvlc_exception_t *p_e )
678 input_thread_t *p_input_thread;
681 p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
682 if ( !p_input_thread )
683 return libvlc_Stopped;
685 var_Get( p_input_thread, "state", &val );
686 vlc_object_release( p_input_thread );
688 if( val.i_int < 0 || val.i_int > 6 )
689 return libvlc_Stopped;
691 return vlc_to_libvlc_state[val.i_int];