2a552695031690c4da931e3b976b098f5118a2a7
[vlc.git] / src / video_output / video_output.c
1 /*****************************************************************************
2  * video_output.c : video output thread
3  * This module describes the programming interface for video output threads.
4  * It includes functions allowing to open a new thread, send pictures to a
5  * thread, and destroy a previously oppened video output thread.
6  *****************************************************************************
7  * Copyright (C) 2000-2001 VideoLAN
8  * $Id: video_output.c,v 1.240 2003/11/24 00:39:02 fenrir Exp $
9  *
10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
25  *****************************************************************************/
26
27 /*****************************************************************************
28  * Preamble
29  *****************************************************************************/
30 #include <stdlib.h>                                                /* free() */
31
32 #include <vlc/vlc.h>
33
34 #ifdef HAVE_SYS_TIMES_H
35 #   include <sys/times.h>
36 #endif
37
38 #include "vlc_video.h"
39 #include "video_output.h"
40 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
41
42 #if defined( SYS_DARWIN )
43 #include "darwin_specific.h"
44 #endif
45
46 /*****************************************************************************
47  * Local prototypes
48  *****************************************************************************/
49 static int      InitThread        ( vout_thread_t * );
50 static void     RunThread         ( vout_thread_t * );
51 static void     ErrorThread       ( vout_thread_t * );
52 static void     EndThread         ( vout_thread_t * );
53 static void     DestroyThread     ( vout_thread_t * );
54
55 static int      ReduceHeight      ( int );
56 static int      BinaryLog         ( uint32_t );
57 static void     MaskToShift       ( int *, int *, uint32_t );
58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
59
60 /* Object variables callbacks */
61 static int FullscreenCallback( vlc_object_t *, char const *,
62                                vlc_value_t, vlc_value_t, void * );
63 static int DeinterlaceCallback( vlc_object_t *, char const *,
64                                 vlc_value_t, vlc_value_t, void * );
65 static int FilterCallback( vlc_object_t *, char const *,
66                            vlc_value_t, vlc_value_t, void * );
67
68 /*****************************************************************************
69  * vout_Request: find a video output thread, create one, or destroy one.
70  *****************************************************************************
71  * This function looks for a video output thread matching the current
72  * properties. If not found, it spawns a new one.
73  *****************************************************************************/
74 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
75                                  unsigned int i_width, unsigned int i_height,
76                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
77 {
78     if( !i_width || !i_height || !i_chroma )
79     {
80         /* Reattach video output to input before bailing out */
81         if( p_vout )
82         {
83             vlc_object_t *p_playlist;
84
85             p_playlist = vlc_object_find( p_this,
86                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
87
88             if( p_playlist )
89             {
90                 vlc_object_detach( p_vout );
91                 vlc_object_attach( p_vout, p_playlist );
92
93                 vlc_object_release( p_playlist );
94             }
95             else
96             {
97                 msg_Dbg( p_this, "cannot find playlist destroying vout" );
98                 vlc_object_detach( p_vout );
99                 vout_Destroy( p_vout );
100             }
101         }
102         return NULL;
103     }
104
105     /* If a video output was provided, lock it, otherwise look for one. */
106     if( p_vout )
107     {
108         vlc_object_yield( p_vout );
109     }
110     else
111     {
112         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
113
114         if( !p_vout )
115         {
116             vlc_object_t *p_playlist;
117
118             p_playlist = vlc_object_find( p_this,
119                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
120             if( p_playlist )
121             {
122                 p_vout = vlc_object_find( p_playlist,
123                                           VLC_OBJECT_VOUT, FIND_CHILD );
124                 /* only first children of p_input for unused vout */
125                 if( p_vout && p_vout->p_parent != p_playlist )
126                 {
127                     vlc_object_release( p_vout );
128                     p_vout = NULL;
129                 }
130                 vlc_object_release( p_playlist );
131             }
132         }
133     }
134
135     /* If we now have a video output, check it has the right properties */
136     if( p_vout )
137     {
138         char *psz_filter_chain;
139
140         /* We don't directly check for the "filter" variable for obvious
141          * performance reasons. */
142         if( p_vout->b_filter_change )
143         {
144             psz_filter_chain = config_GetPsz( p_this, "filter" );
145
146             if( psz_filter_chain && !*psz_filter_chain )
147             {
148                 free( psz_filter_chain );
149                 psz_filter_chain = NULL;
150             }
151             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
152             {
153                 free( p_vout->psz_filter_chain );
154                 p_vout->psz_filter_chain = NULL;
155             }
156
157             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
158                 ( psz_filter_chain && p_vout->psz_filter_chain &&
159                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
160             {
161                 p_vout->b_filter_change = VLC_FALSE;
162             }
163
164             if( psz_filter_chain ) free( psz_filter_chain );
165         }
166
167         if( ( p_vout->render.i_width != i_width ) ||
168             ( p_vout->render.i_height != i_height ) ||
169             ( p_vout->render.i_chroma != i_chroma ) ||
170             ( p_vout->render.i_aspect != i_aspect
171                     && !p_vout->b_override_aspect ) ||
172             p_vout->b_filter_change )
173         {
174             /* We are not interested in this format, close this vout */
175             vlc_object_detach( p_vout );
176             vlc_object_release( p_vout );
177             vout_Destroy( p_vout );
178             p_vout = NULL;
179         }
180         else
181         {
182             /* This video output is cool! Hijack it. */
183             vlc_object_detach( p_vout );
184             vlc_object_attach( p_vout, p_this );
185             vlc_object_release( p_vout );
186         }
187     }
188
189     if( !p_vout )
190     {
191         msg_Dbg( p_this, "no usable vout present, spawning one" );
192
193         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
194     }
195
196     return p_vout;
197 }
198
199 /*****************************************************************************
200  * vout_Create: creates a new video output thread
201  *****************************************************************************
202  * This function creates a new video output thread, and returns a pointer
203  * to its description. On error, it returns NULL.
204  *****************************************************************************/
205 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
206                                unsigned int i_width, unsigned int i_height,
207                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
208 {
209     vout_thread_t  * p_vout;                            /* thread descriptor */
210     input_thread_t * p_input_thread;
211     int              i_index;                               /* loop variable */
212     char           * psz_plugin;
213     vlc_value_t      val, text;
214
215     /* Allocate descriptor */
216     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
217     if( p_vout == NULL )
218     {
219         msg_Err( p_parent, "out of memory" );
220         return NULL;
221     }
222
223     /* Initialize pictures and subpictures - translation tables and functions
224      * will be initialized later in InitThread */
225     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
226     {
227         p_vout->p_picture[i_index].pf_lock = NULL;
228         p_vout->p_picture[i_index].pf_unlock = NULL;
229         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
230         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
231     }
232
233     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
234     {
235         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
236         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
237     }
238
239     /* No images in the heap */
240     p_vout->i_heap_size = 0;
241
242     /* Initialize the rendering heap */
243     I_RENDERPICTURES = 0;
244     p_vout->render.i_width    = i_width;
245     p_vout->render.i_height   = i_height;
246     p_vout->render.i_chroma   = i_chroma;
247     p_vout->render.i_aspect   = i_aspect;
248
249     p_vout->render.i_rmask    = 0;
250     p_vout->render.i_gmask    = 0;
251     p_vout->render.i_bmask    = 0;
252
253     p_vout->render.i_last_used_pic = -1;
254     p_vout->render.b_allow_modify_pics = 1;
255
256     /* Zero the output heap */
257     I_OUTPUTPICTURES = 0;
258     p_vout->output.i_width    = 0;
259     p_vout->output.i_height   = 0;
260     p_vout->output.i_chroma   = 0;
261     p_vout->output.i_aspect   = 0;
262
263     p_vout->output.i_rmask    = 0;
264     p_vout->output.i_gmask    = 0;
265     p_vout->output.i_bmask    = 0;
266
267     /* Initialize misc stuff */
268     p_vout->i_changes    = 0;
269     p_vout->f_gamma      = 0;
270     p_vout->b_grayscale  = 0;
271     p_vout->b_info       = 0;
272     p_vout->b_interface  = 0;
273     p_vout->b_scale      = 1;
274     p_vout->b_fullscreen = 0;
275     p_vout->i_alignment  = 0;
276     p_vout->render_time  = 10;
277     p_vout->c_fps_samples = 0;
278     p_vout->b_filter_change = 0;
279
280     /* Mouse coordinates */
281     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
282     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
283     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
284     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
285     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
286
287     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
288     val.b_bool = VLC_TRUE;
289     var_Set( p_vout, "intf-change", val );
290
291     /* Initialize locks */
292     vlc_mutex_init( p_vout, &p_vout->picture_lock );
293     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
294     vlc_mutex_init( p_vout, &p_vout->change_lock );
295
296     /* Attach the new object now so we can use var inheritance below */
297     vlc_object_attach( p_vout, p_parent );
298
299     /* Create a few object variables we'll need later on */
300     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
301     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
302     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
303     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
304     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
305
306     p_vout->b_override_aspect = VLC_FALSE;
307
308     /* If the parent is not a VOUT object, that means we are at the start of
309      * the video output pipe */
310     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
311     {
312         var_Get( p_vout, "aspect-ratio", &val );
313
314         /* Check whether the user tried to override aspect ratio */
315         if( val.psz_string )
316         {
317             unsigned int i_new_aspect = i_aspect;
318             char *psz_parser = strchr( val.psz_string, ':' );
319
320             if( psz_parser )
321             {
322                 *psz_parser++ = '\0';
323                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
324                                                       / atoi( psz_parser );
325             }
326             else
327             {
328                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
329                                        * atof( val.psz_string )
330                                        / i_height;
331             }
332
333             free( val.psz_string );
334
335             if( i_new_aspect && i_new_aspect != i_aspect )
336             {
337                 int i_pgcd = ReduceHeight( i_new_aspect );
338
339                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
340                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
341
342                 p_vout->render.i_aspect = i_new_aspect;
343
344                 p_vout->b_override_aspect = VLC_TRUE;
345             }
346         }
347
348         /* Look for the default filter configuration */
349         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
350         var_Get( p_vout, "filter", &val );
351         p_vout->psz_filter_chain = val.psz_string;
352     }
353     else
354     {
355         /* continue the parent's filter chain */
356         char *psz_end;
357
358         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
359         if( psz_end && *(psz_end+1) )
360             p_vout->psz_filter_chain = strdup( psz_end+1 );
361         else p_vout->psz_filter_chain = NULL;
362     }
363
364     /* Choose the video output module */
365     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
366     {
367         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
368         var_Get( p_vout, "vout", &val );
369         psz_plugin = val.psz_string;
370     }
371     else
372     {
373         /* the filter chain is a string list of filters separated by double
374          * colons */
375         char *psz_end;
376
377         psz_end = strchr( p_vout->psz_filter_chain, ':' );
378         if( psz_end )
379             psz_plugin = strndup( p_vout->psz_filter_chain,
380                                   psz_end - p_vout->psz_filter_chain );
381         else psz_plugin = strdup( p_vout->psz_filter_chain );
382     }
383
384     /* Initialize the dimensions of the video window */
385     InitWindowSize( p_vout, &p_vout->i_window_width,
386                     &p_vout->i_window_height );
387
388     /* Create the vout thread */
389     p_vout->p_module = module_Need( p_vout,
390                            ( p_vout->psz_filter_chain &&
391                                *p_vout->psz_filter_chain ) ?
392                            "video filter" : "video output",
393                            psz_plugin );
394
395     if( psz_plugin ) free( psz_plugin );
396     if( p_vout->p_module == NULL )
397     {
398         msg_Err( p_vout, "no suitable vout module" );
399         vlc_object_destroy( p_vout );
400         return NULL;
401     }
402
403     p_vout->p_text_renderer_module = module_Need( p_vout, "text renderer",
404                                                   NULL );
405     if( p_vout->p_text_renderer_module == NULL )
406     {
407         msg_Warn( p_vout, "no suitable text renderer module" );
408         p_vout->pf_add_string = NULL;
409     }
410
411     /* Create a few object variables for interface interaction */
412     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
413     text.psz_string = _("Fullscreen");
414     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
415     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
416     if( val.b_bool )
417     {
418         /* user requested fullscreen */
419         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
420     }
421     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
422
423     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
424     text.psz_string = _("Deinterlace");
425     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
426     val.psz_string = ""; text.psz_string = _("Disable");
427     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
428     val.psz_string = "discard"; text.psz_string = _("Discard");
429     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
430     val.psz_string = "blend"; text.psz_string = _("Blend");
431     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
432     val.psz_string = "mean"; text.psz_string = _("Mean");
433     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
434     val.psz_string = "bob"; text.psz_string = _("Bob");
435     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
436     val.psz_string = "linear"; text.psz_string = _("Linear");
437     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
438     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
439     {
440         var_Set( p_vout, "deinterlace", val );
441     }
442     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
443
444
445     var_Create( p_vout, "filter", VLC_VAR_STRING );
446     text.psz_string = _("Filters");
447     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
448     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
449     if( var_Get( p_vout, "filter", &val ) == VLC_SUCCESS )
450     {
451         var_Set( p_vout, "filter", val );
452     }
453     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
454
455     /* Calculate delay created by internal caching */
456     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
457                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
458     if( p_input_thread )
459     {
460         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
461         vlc_object_release( p_input_thread );
462     }
463     else
464     {
465         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
466     }
467
468     if( vlc_thread_create( p_vout, "video output", RunThread,
469                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
470     {
471         msg_Err( p_vout, "out of memory" );
472         module_Unneed( p_vout, p_vout->p_module );
473         vlc_object_destroy( p_vout );
474         return NULL;
475     }
476
477     return p_vout;
478 }
479
480 /*****************************************************************************
481  * vout_Destroy: destroys a previously created video output
482  *****************************************************************************
483  * Destroy a terminated thread.
484  * The function will request a destruction of the specified thread. If pi_error
485  * is NULL, it will return once the thread is destroyed. Else, it will be
486  * update using one of the THREAD_* constants.
487  *****************************************************************************/
488 void vout_Destroy( vout_thread_t *p_vout )
489
490     vlc_object_t *p_playlist;
491     
492     /* Request thread destruction */
493     p_vout->b_die = VLC_TRUE;
494     vlc_thread_join( p_vout );
495
496     var_Destroy( p_vout, "intf-change" );
497
498     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST, 
499                                   FIND_ANYWHERE );
500
501     /* Free structure */
502     vlc_object_destroy( p_vout );
503
504     /* If it was the last vout, tell the interface to show up */
505     if( p_playlist != NULL )
506     {
507         vout_thread_t *p_another_vout = vlc_object_find( p_playlist, 
508                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
509         if( p_another_vout == NULL )
510         {
511             vlc_value_t val;
512             val.b_bool = VLC_TRUE;
513             var_Set( p_playlist, "intf-show", val );
514         }
515         else
516         {
517             vlc_object_release( p_another_vout );
518         }
519         vlc_object_release( p_playlist );
520     }
521 }
522
523 /*****************************************************************************
524  * InitThread: initialize video output thread
525  *****************************************************************************
526  * This function is called from RunThread and performs the second step of the
527  * initialization. It returns 0 on success. Note that the thread's flag are not
528  * modified inside this function.
529  *****************************************************************************/
530 static int InitThread( vout_thread_t *p_vout )
531 {
532     int i, i_pgcd;
533
534     vlc_mutex_lock( &p_vout->change_lock );
535
536 #ifdef STATS
537     p_vout->c_loops = 0;
538 #endif
539
540     /* Initialize output method, it allocates direct buffers for us */
541     if( p_vout->pf_init( p_vout ) )
542     {
543         vlc_mutex_unlock( &p_vout->change_lock );
544         return VLC_EGENERIC;
545     }
546
547     if( !I_OUTPUTPICTURES )
548     {
549         msg_Err( p_vout, "plugin was unable to allocate at least "
550                          "one direct buffer" );
551         p_vout->pf_end( p_vout );
552         vlc_mutex_unlock( &p_vout->change_lock );
553         return VLC_EGENERIC;
554     }
555
556     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
557     {
558         msg_Err( p_vout, "plugin allocated too many direct buffers, "
559                          "our internal buffers must have overflown." );
560         p_vout->pf_end( p_vout );
561         vlc_mutex_unlock( &p_vout->change_lock );
562         return VLC_EGENERIC;
563     }
564
565     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
566
567 #if 0
568     if( !p_vout->psz_filter_chain )
569     {
570         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
571
572         if( psz_aspect )
573         {
574             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
575                                                       * atof( psz_aspect )
576                                                       / p_vout->output.i_height;
577             free( psz_aspect );
578
579             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
580             {
581                 int i_pgcd = ReduceHeight( i_new_aspect );
582                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
583                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
584                 p_vout->output.i_aspect = i_new_aspect;
585             }
586         }
587     }
588 #endif
589
590     i_pgcd = ReduceHeight( p_vout->render.i_aspect );
591     msg_Dbg( p_vout,
592              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
593              p_vout->render.i_width, p_vout->render.i_height,
594              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
595              p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
596
597     i_pgcd = ReduceHeight( p_vout->output.i_aspect );
598     msg_Dbg( p_vout,
599              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
600              p_vout->output.i_width, p_vout->output.i_height,
601              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
602              p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
603
604     /* Calculate shifts from system-updated masks */
605     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
606                  p_vout->output.i_rmask );
607     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
608                  p_vout->output.i_gmask );
609     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
610                  p_vout->output.i_bmask );
611
612     /* Check whether we managed to create direct buffers similar to
613      * the render buffers, ie same size and chroma */
614     if( ( p_vout->output.i_width == p_vout->render.i_width )
615      && ( p_vout->output.i_height == p_vout->render.i_height )
616      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
617     {
618         /* Cool ! We have direct buffers, we can ask the decoder to
619          * directly decode into them ! Map the first render buffers to
620          * the first direct buffers, but keep the first direct buffer
621          * for memcpy operations */
622         p_vout->b_direct = 1;
623
624         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
625         {
626             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
627                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
628                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
629             {
630                 /* We have enough direct buffers so there's no need to
631                  * try to use system memory buffers. */
632                 break;
633             }
634             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
635             I_RENDERPICTURES++;
636         }
637
638         msg_Dbg( p_vout, "direct render, mapping "
639                  "render pictures 0-%i to system pictures 1-%i",
640                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
641     }
642     else
643     {
644         /* Rats... Something is wrong here, we could not find an output
645          * plugin able to directly render what we decode. See if we can
646          * find a chroma plugin to do the conversion */
647         p_vout->b_direct = 0;
648
649         /* Choose the best module */
650         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
651
652         if( p_vout->chroma.p_module == NULL )
653         {
654             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
655                      (char*)&p_vout->render.i_chroma,
656                      (char*)&p_vout->output.i_chroma );
657             p_vout->pf_end( p_vout );
658             vlc_mutex_unlock( &p_vout->change_lock );
659             return VLC_EGENERIC;
660         }
661
662         msg_Dbg( p_vout, "indirect render, mapping "
663                  "render pictures 0-%i to system pictures %i-%i",
664                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
665                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
666
667         /* Append render buffers after the direct buffers */
668         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
669         {
670             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
671             I_RENDERPICTURES++;
672
673             /* Check if we have enough render pictures */
674             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
675                 break;
676         }
677     }
678
679     /* Link pictures back to their heap */
680     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
681     {
682         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
683     }
684
685     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
686     {
687         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
688     }
689
690 /* XXX XXX mark thread ready */
691     return VLC_SUCCESS;
692 }
693
694 /*****************************************************************************
695  * RunThread: video output thread
696  *****************************************************************************
697  * Video output thread. This function does only returns when the thread is
698  * terminated. It handles the pictures arriving in the video heap and the
699  * display device events.
700  *****************************************************************************/
701 static void RunThread( vout_thread_t *p_vout)
702 {
703     int             i_index;                                /* index in heap */
704     int             i_idle_loops = 0;  /* loops without displaying a picture */
705     mtime_t         current_date;                            /* current date */
706     mtime_t         display_date;                            /* display date */
707
708     picture_t *     p_picture;                            /* picture pointer */
709     picture_t *     p_last_picture = NULL;                   /* last picture */
710     picture_t *     p_directbuffer;              /* direct buffer to display */
711
712     subpicture_t *  p_subpic;                          /* subpicture pointer */
713
714     /*
715      * Initialize thread
716      */
717     p_vout->b_error = InitThread( p_vout );
718
719     /* signal the creation of the vout */
720     vlc_thread_ready( p_vout );
721
722     if( p_vout->b_error )
723     {
724         /* Destroy thread structures allocated by Create and InitThread */
725         DestroyThread( p_vout );
726         return;
727     }
728
729     /*
730      * Main loop - it is not executed if an error occured during
731      * initialization
732      */
733     while( (!p_vout->b_die) && (!p_vout->b_error) )
734     {
735         /* Initialize loop variables */
736         p_picture = NULL;
737         display_date = 0;
738         current_date = mdate();
739
740 #if 0
741         p_vout->c_loops++;
742         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
743         {
744             msg_Dbg( p_vout, "picture heap: %d/%d",
745                      I_RENDERPICTURES, p_vout->i_heap_size );
746         }
747 #endif
748
749         /*
750          * Find the picture to display (the one with the earliest date).
751          * This operation does not need lock, since only READY_PICTUREs
752          * are handled. */
753         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
754         {
755             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
756                 && ( (p_picture == NULL) ||
757                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
758             {
759                 p_picture = PP_RENDERPICTURE[i_index];
760                 display_date = p_picture->date;
761             }
762         }
763
764         if( p_picture )
765         {
766             /* If we met the last picture, parse again to see whether there is
767              * a more appropriate one. */
768             if( p_picture == p_last_picture )
769             {
770                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
771                 {
772                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
773                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
774                         && ((p_picture == p_last_picture) ||
775                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
776                     {
777                         p_picture = PP_RENDERPICTURE[i_index];
778                         display_date = p_picture->date;
779                     }
780                 }
781             }
782
783             /* If we found better than the last picture, destroy it */
784             if( p_last_picture && p_picture != p_last_picture )
785             {
786                 vlc_mutex_lock( &p_vout->picture_lock );
787                 if( p_last_picture->i_refcount )
788                 {
789                     p_last_picture->i_status = DISPLAYED_PICTURE;
790                 }
791                 else
792                 {
793                     p_last_picture->i_status = DESTROYED_PICTURE;
794                     p_vout->i_heap_size--;
795                 }
796                 vlc_mutex_unlock( &p_vout->picture_lock );
797                 p_last_picture = NULL;
798             }
799
800             /* Compute FPS rate */
801             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
802                 = display_date;
803
804             if( !p_picture->b_force &&
805                 p_picture != p_last_picture &&
806                 display_date < current_date + p_vout->render_time )
807             {
808                 /* Picture is late: it will be destroyed and the thread
809                  * will directly choose the next picture */
810                 vlc_mutex_lock( &p_vout->picture_lock );
811                 if( p_picture->i_refcount )
812                 {
813                     /* Pretend we displayed the picture, but don't destroy
814                      * it since the decoder might still need it. */
815                     p_picture->i_status = DISPLAYED_PICTURE;
816                 }
817                 else
818                 {
819                     /* Destroy the picture without displaying it */
820                     p_picture->i_status = DESTROYED_PICTURE;
821                     p_vout->i_heap_size--;
822                 }
823                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
824                                   current_date - display_date );
825                 vlc_mutex_unlock( &p_vout->picture_lock );
826
827                 continue;
828             }
829
830             if( display_date >
831                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
832             {
833                 /* Picture is waaay too early: it will be destroyed */
834                 vlc_mutex_lock( &p_vout->picture_lock );
835                 if( p_picture->i_refcount )
836                 {
837                     /* Pretend we displayed the picture, but don't destroy
838                      * it since the decoder might still need it. */
839                     p_picture->i_status = DISPLAYED_PICTURE;
840                 }
841                 else
842                 {
843                     /* Destroy the picture without displaying it */
844                     p_picture->i_status = DESTROYED_PICTURE;
845                     p_vout->i_heap_size--;
846                 }
847                 msg_Warn( p_vout, "vout warning: early picture skipped "
848                           "("I64Fd")", display_date - current_date
849                           - p_vout->i_pts_delay );
850                 vlc_mutex_unlock( &p_vout->picture_lock );
851
852                 continue;
853             }
854
855             if( display_date > current_date + VOUT_DISPLAY_DELAY )
856             {
857                 /* A picture is ready to be rendered, but its rendering date
858                  * is far from the current one so the thread will perform an
859                  * empty loop as if no picture were found. The picture state
860                  * is unchanged */
861                 p_picture    = NULL;
862                 display_date = 0;
863             }
864             else if( p_picture == p_last_picture )
865             {
866                 /* We are asked to repeat the previous picture, but we first
867                  * wait for a couple of idle loops */
868                 if( i_idle_loops < 4 )
869                 {
870                     p_picture    = NULL;
871                     display_date = 0;
872                 }
873                 else
874                 {
875                     /* We set the display date to something high, otherwise
876                      * we'll have lots of problems with late pictures */
877                     display_date = current_date + p_vout->render_time;
878                 }
879             }
880         }
881
882         if( p_picture == NULL )
883         {
884             i_idle_loops++;
885         }
886
887         /*
888          * Check for subpictures to display
889          */
890         p_subpic = vout_SortSubPictures( p_vout, display_date );
891
892         /*
893          * Perform rendering
894          */
895         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
896
897         /*
898          * Call the plugin-specific rendering method if there is one
899          */
900         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
901         {
902             /* Render the direct buffer returned by vout_RenderPicture */
903             p_vout->pf_render( p_vout, p_directbuffer );
904         }
905
906         /*
907          * Sleep, wake up
908          */
909         if( display_date != 0 && p_directbuffer != NULL )
910         {
911             mtime_t current_render_time = mdate() - current_date;
912             /* if render time is very large we don't include it in the mean */
913             if( current_render_time < p_vout->render_time +
914                 VOUT_DISPLAY_DELAY )
915             {
916                 /* Store render time using a sliding mean weighting to
917                  * current value in a 3 to 1 ratio*/
918                 p_vout->render_time *= 3;
919                 p_vout->render_time += current_render_time;
920                 p_vout->render_time >>= 2;
921             }
922         }
923
924         /* Give back change lock */
925         vlc_mutex_unlock( &p_vout->change_lock );
926
927         /* Sleep a while or until a given date */
928         if( display_date != 0 )
929         {
930             /* If there are filters in the chain, better give them the picture
931              * in advance */
932             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
933             {
934                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
935             }
936         }
937         else
938         {
939             msleep( VOUT_IDLE_SLEEP );
940         }
941
942         /* On awakening, take back lock and send immediately picture
943          * to display. */
944         vlc_mutex_lock( &p_vout->change_lock );
945
946         /*
947          * Display the previously rendered picture
948          */
949         if( p_picture != NULL && p_directbuffer != NULL )
950         {
951             /* Display the direct buffer returned by vout_RenderPicture */
952             if( p_vout->pf_display )
953             {
954                 p_vout->pf_display( p_vout, p_directbuffer );
955             }
956
957             /* Reinitialize idle loop count */
958             i_idle_loops = 0;
959
960             /* Tell the vout this was the last picture and that it does not
961              * need to be forced anymore. */
962             p_last_picture = p_picture;
963             p_last_picture->b_force = 0;
964         }
965
966         /*
967          * Check events and manage thread
968          */
969         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
970         {
971             /* A fatal error occured, and the thread must terminate
972              * immediately, without displaying anything - setting b_error to 1
973              * causes the immediate end of the main while() loop. */
974             p_vout->b_error = 1;
975         }
976
977         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
978         {
979             /* this must only happen when the vout plugin is incapable of
980              * rescaling the picture itself. In this case we need to destroy
981              * the current picture buffers and recreate new ones with the right
982              * dimensions */
983             int i;
984
985             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
986
987             p_vout->pf_end( p_vout );
988             for( i = 0; i < I_OUTPUTPICTURES; i++ )
989                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
990
991             I_OUTPUTPICTURES = 0;
992             if( p_vout->pf_init( p_vout ) )
993             {
994                 msg_Err( p_vout, "cannot resize display" );
995                 /* FIXME: pf_end will be called again in EndThread() */
996                 p_vout->b_error = 1;
997             }
998
999             /* Need to reinitialise the chroma plugin */
1000             if( p_vout->chroma.p_module )
1001             {
1002                 if( p_vout->chroma.p_module->pf_deactivate )
1003                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1004                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1005             }
1006         }
1007     }
1008
1009     /*
1010      * Error loop - wait until the thread destruction is requested
1011      */
1012     if( p_vout->b_error )
1013     {
1014         ErrorThread( p_vout );
1015     }
1016
1017     /* End of thread */
1018     EndThread( p_vout );
1019
1020     /* Destroy thread structures allocated by CreateThread */
1021     DestroyThread( p_vout );
1022 }
1023
1024 /*****************************************************************************
1025  * ErrorThread: RunThread() error loop
1026  *****************************************************************************
1027  * This function is called when an error occured during thread main's loop. The
1028  * thread can still receive feed, but must be ready to terminate as soon as
1029  * possible.
1030  *****************************************************************************/
1031 static void ErrorThread( vout_thread_t *p_vout )
1032 {
1033     /* Wait until a `die' order */
1034     while( !p_vout->b_die )
1035     {
1036         /* Sleep a while */
1037         msleep( VOUT_IDLE_SLEEP );
1038     }
1039 }
1040
1041 /*****************************************************************************
1042  * EndThread: thread destruction
1043  *****************************************************************************
1044  * This function is called when the thread ends after a sucessful
1045  * initialization. It frees all ressources allocated by InitThread.
1046  *****************************************************************************/
1047 static void EndThread( vout_thread_t *p_vout )
1048 {
1049     int     i_index;                                        /* index in heap */
1050
1051 #ifdef STATS
1052     {
1053         struct tms cpu_usage;
1054         times( &cpu_usage );
1055
1056         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1057                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1058     }
1059 #endif
1060
1061     if( !p_vout->b_direct )
1062     {
1063         module_Unneed( p_vout, p_vout->chroma.p_module );
1064     }
1065     
1066     /* Destroy all remaining pictures */
1067     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1068     {
1069         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1070         {
1071             free( p_vout->p_picture[i_index].p_data_orig );
1072         }
1073     }
1074
1075     /* Destroy all remaining subpictures */
1076     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1077     {
1078         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1079         {
1080             vout_DestroySubPicture( p_vout,
1081                                     &p_vout->p_subpicture[i_index] );
1082         }
1083     }
1084
1085     if( p_vout->p_text_renderer_module )
1086         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1087     
1088     /* Destroy translation tables */
1089     p_vout->pf_end( p_vout );
1090
1091     /* Release the change lock */
1092     vlc_mutex_unlock( &p_vout->change_lock );
1093 }
1094
1095 /*****************************************************************************
1096  * DestroyThread: thread destruction
1097  *****************************************************************************
1098  * This function is called when the thread ends. It frees all ressources
1099  * allocated by CreateThread. Status is available at this stage.
1100  *****************************************************************************/
1101 static void DestroyThread( vout_thread_t *p_vout )
1102 {
1103     /* Destroy the locks */
1104     vlc_mutex_destroy( &p_vout->picture_lock );
1105     vlc_mutex_destroy( &p_vout->subpicture_lock );
1106     vlc_mutex_destroy( &p_vout->change_lock );
1107
1108     /* Release the module */
1109     module_Unneed( p_vout, p_vout->p_module );
1110 }
1111
1112 /* following functions are local */
1113
1114 static int ReduceHeight( int i_ratio )
1115 {
1116     int i_dummy = VOUT_ASPECT_FACTOR;
1117     int i_pgcd  = 1;
1118  
1119     if( !i_ratio )
1120     {
1121         return i_pgcd;
1122     }
1123
1124     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1125     while( !(i_ratio & 1) && !(i_dummy & 1) )
1126     {
1127         i_ratio >>= 1;
1128         i_dummy >>= 1;
1129         i_pgcd  <<= 1;
1130     }
1131
1132     while( !(i_ratio % 3) && !(i_dummy % 3) )
1133     {
1134         i_ratio /= 3;
1135         i_dummy /= 3;
1136         i_pgcd  *= 3;
1137     }
1138
1139     while( !(i_ratio % 5) && !(i_dummy % 5) )
1140     {
1141         i_ratio /= 5;
1142         i_dummy /= 5;
1143         i_pgcd  *= 5;
1144     }
1145
1146     return i_pgcd;
1147 }
1148
1149 /*****************************************************************************
1150  * BinaryLog: computes the base 2 log of a binary value
1151  *****************************************************************************
1152  * This functions is used by MaskToShift, to get a bit index from a binary
1153  * value.
1154  *****************************************************************************/
1155 static int BinaryLog( uint32_t i )
1156 {
1157     int i_log = 0;
1158
1159     if( i == 0 ) return -31337;
1160
1161     if( i & 0xffff0000 ) i_log += 16;
1162     if( i & 0xff00ff00 ) i_log += 8;
1163     if( i & 0xf0f0f0f0 ) i_log += 4;
1164     if( i & 0xcccccccc ) i_log += 2;
1165     if( i & 0xaaaaaaaa ) i_log += 1;
1166
1167     return i_log;
1168 }
1169
1170 /*****************************************************************************
1171  * MaskToShift: transform a color mask into right and left shifts
1172  *****************************************************************************
1173  * This function is used for obtaining color shifts from masks.
1174  *****************************************************************************/
1175 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1176 {
1177     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1178
1179     if( !i_mask )
1180     {
1181         *pi_left = *pi_right = 0;
1182         return;
1183     }
1184
1185     /* Get bits */
1186     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1187     i_high = i_mask + i_low;                       /* higher bit of the mask */
1188
1189     /* Transform bits into an index */
1190     i_low =  BinaryLog (i_low);
1191     i_high = BinaryLog (i_high);
1192
1193     /* Update pointers and return */
1194     *pi_left =   i_low;
1195     *pi_right = (8 - i_high + i_low);
1196 }
1197
1198 /*****************************************************************************
1199  * InitWindowSize: find the initial dimensions the video window should have.
1200  *****************************************************************************
1201  * This function will check the "width", "height" and "zoom" config options and
1202  * will calculate the size that the video window should have.
1203  *****************************************************************************/
1204 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1205                             int *pi_height )
1206 {
1207     vlc_value_t val;
1208     int i_width, i_height;
1209     uint64_t ll_zoom;
1210
1211 #define FP_FACTOR 1000                             /* our fixed point factor */
1212
1213     var_Get( p_vout, "align", &val );
1214     p_vout->i_alignment = val.i_int;
1215
1216     var_Get( p_vout, "width", &val );
1217     i_width = val.i_int;
1218     var_Get( p_vout, "height", &val );
1219     i_height = val.i_int;
1220     var_Get( p_vout, "zoom", &val );
1221     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1222
1223     if( i_width > 0 && i_height > 0)
1224     {
1225         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1226         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1227         return;
1228     }
1229     else if( i_width > 0 )
1230     {
1231         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1232         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1233                             p_vout->render.i_aspect / FP_FACTOR );
1234         return;
1235     }
1236     else if( i_height > 0 )
1237     {
1238         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1239         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1240                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1241         return;
1242     }
1243
1244     if( p_vout->render.i_height * p_vout->render.i_aspect
1245         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1246     {
1247         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1248           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1249         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1250     }
1251     else
1252     {
1253         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1254         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1255           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1256     }
1257
1258 #undef FP_FACTOR
1259 }
1260
1261 /*****************************************************************************
1262  * vout_VarCallback: generic callback for intf variables
1263  *****************************************************************************/
1264 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1265                       vlc_value_t old_value, vlc_value_t new_value,
1266                       void * unused )
1267 {
1268     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1269     vlc_value_t val;
1270     val.b_bool = VLC_TRUE;
1271     var_Set( p_vout, "intf-change", val );
1272     return VLC_SUCCESS;
1273 }
1274
1275 /*****************************************************************************
1276  * object variables callbacks: a bunch of object variables are used by the
1277  * interfaces to interact with the vout.
1278  *****************************************************************************/
1279 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1280                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1281 {
1282     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1283     input_thread_t *p_input;
1284     vlc_value_t val;
1285
1286     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1287
1288     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1289                                                  FIND_PARENT );
1290     if( p_input )
1291     {
1292         /* Modify input as well because the vout might have to be restarted */
1293         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1294         var_Set( p_input, "fullscreen", newval );
1295
1296         vlc_object_release( p_input );
1297     }
1298
1299     val.b_bool = VLC_TRUE;
1300     var_Set( p_vout, "intf-change", val );
1301     return VLC_SUCCESS;
1302 }
1303
1304 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1305                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1306 {
1307     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1308     input_thread_t *p_input;
1309     vlc_value_t val;
1310
1311     char *psz_mode = newval.psz_string;
1312     char *psz_filter;
1313     unsigned int  i;
1314
1315     psz_filter = config_GetPsz( p_vout, "filter" );
1316
1317     if( !psz_mode || !*psz_mode )
1318     {
1319         config_PutPsz( p_vout, "filter", "" );
1320     }
1321     else
1322     {
1323         if( !psz_filter || !*psz_filter )
1324         {
1325             config_PutPsz( p_vout, "filter", "deinterlace" );
1326         }
1327         else
1328         {
1329             if( strstr( psz_filter, "deinterlace" ) == NULL )
1330             {
1331                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1332                 strcat( psz_filter, ",deinterlace" );
1333             }
1334             config_PutPsz( p_vout, "filter", psz_filter );
1335         }
1336     }
1337
1338     if( psz_filter ) free( psz_filter );
1339
1340
1341     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1342                                                  FIND_PARENT );
1343     if( !p_input ) return VLC_EGENERIC;
1344
1345     if( psz_mode && *psz_mode )
1346     {
1347         val.psz_string = psz_mode;
1348         var_Set( p_vout, "deinterlace-mode", val );
1349         /* Modify input as well because the vout might have to be restarted */
1350         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1351         var_Set( p_input, "deinterlace-mode", val );
1352     }
1353
1354     /* now restart all video streams */
1355     vlc_mutex_lock( &p_input->stream.stream_lock );
1356
1357     p_vout->b_filter_change = VLC_TRUE;
1358
1359 #define ES p_input->stream.pp_es[i]
1360
1361     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1362     {
1363         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1364         {
1365             input_UnselectES( p_input, ES );
1366             input_SelectES( p_input, ES );
1367         }
1368 #undef ES
1369     }
1370     vlc_mutex_unlock( &p_input->stream.stream_lock );
1371
1372     vlc_object_release( p_input );
1373
1374     val.b_bool = VLC_TRUE;
1375     var_Set( p_vout, "intf-change", val );
1376     return VLC_SUCCESS;
1377 }
1378
1379 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1380                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1381 {
1382     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1383     input_thread_t *p_input;
1384     vlc_value_t val;
1385     unsigned int i;
1386
1387     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1388                                                  FIND_PARENT );
1389
1390     if (!p_input)
1391     {
1392         msg_Err( p_vout, "Input not found" );
1393         return( VLC_EGENERIC );
1394     }
1395     /* Restart the video stream */
1396     vlc_mutex_lock( &p_input->stream.stream_lock );
1397
1398     p_vout->b_filter_change = VLC_TRUE;
1399
1400 #define ES p_input->stream.pp_es[i]
1401
1402     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1403     {
1404         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1405         {
1406             input_UnselectES( p_input, ES );
1407             input_SelectES( p_input, ES );
1408         }
1409 #undef ES
1410     }
1411     vlc_mutex_unlock( &p_input->stream.stream_lock );
1412
1413     vlc_object_release( p_input );
1414
1415     val.b_bool = VLC_TRUE;
1416     var_Set( p_vout, "intf-change", val );
1417     return VLC_SUCCESS;
1418 }
1419