7ab2167f6a4c87f715571fb231b97614d7d28841
[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) 2000-2004 VideoLAN
8  * $Id: video_output.c,v 1.244 2004/01/10 13:59:25 rocky 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_AspectRatio
70  *
71  * Set the i_aspect_x and i_aspect_y from i_aspect.
72  */
73 void vout_AspectRatio( unsigned int i_aspect, 
74                        /*out*/ unsigned int *i_aspect_x, 
75                        /*out*/ unsigned int *i_aspect_y )
76
77   unsigned int i_pgcd = ReduceHeight( i_aspect );
78   *i_aspect_x = i_aspect / i_pgcd;
79   *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
80 }
81
82 /*****************************************************************************
83  * vout_Request: find a video output thread, create one, or destroy one.
84  *****************************************************************************
85  * This function looks for a video output thread matching the current
86  * properties. If not found, it spawns a new one.
87  *****************************************************************************/
88 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
89                                  unsigned int i_width, unsigned int i_height,
90                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
91 {
92     if( !i_width || !i_height || !i_chroma )
93     {
94         /* Reattach video output to input before bailing out */
95         if( p_vout )
96         {
97             vlc_object_t *p_playlist;
98
99             p_playlist = vlc_object_find( p_this,
100                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
101
102             if( p_playlist )
103             {
104                 vlc_object_detach( p_vout );
105                 vlc_object_attach( p_vout, p_playlist );
106
107                 vlc_object_release( p_playlist );
108             }
109             else
110             {
111                 msg_Dbg( p_this, "cannot find playlist destroying vout" );
112                 vlc_object_detach( p_vout );
113                 vout_Destroy( p_vout );
114             }
115         }
116         return NULL;
117     }
118
119     /* If a video output was provided, lock it, otherwise look for one. */
120     if( p_vout )
121     {
122         vlc_object_yield( p_vout );
123     }
124     else
125     {
126         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
127
128         if( !p_vout )
129         {
130             vlc_object_t *p_playlist;
131
132             p_playlist = vlc_object_find( p_this,
133                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
134             if( p_playlist )
135             {
136                 p_vout = vlc_object_find( p_playlist,
137                                           VLC_OBJECT_VOUT, FIND_CHILD );
138                 /* only first children of p_input for unused vout */
139                 if( p_vout && p_vout->p_parent != p_playlist )
140                 {
141                     vlc_object_release( p_vout );
142                     p_vout = NULL;
143                 }
144                 vlc_object_release( p_playlist );
145             }
146         }
147     }
148
149     /* If we now have a video output, check it has the right properties */
150     if( p_vout )
151     {
152         char *psz_filter_chain;
153
154         /* We don't directly check for the "filter" variable for obvious
155          * performance reasons. */
156         if( p_vout->b_filter_change )
157         {
158             psz_filter_chain = config_GetPsz( p_this, "filter" );
159
160             if( psz_filter_chain && !*psz_filter_chain )
161             {
162                 free( psz_filter_chain );
163                 psz_filter_chain = NULL;
164             }
165             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
166             {
167                 free( p_vout->psz_filter_chain );
168                 p_vout->psz_filter_chain = NULL;
169             }
170
171             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
172                 ( psz_filter_chain && p_vout->psz_filter_chain &&
173                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
174             {
175                 p_vout->b_filter_change = VLC_FALSE;
176             }
177
178             if( psz_filter_chain ) free( psz_filter_chain );
179         }
180
181         if( ( p_vout->render.i_width != i_width ) ||
182             ( p_vout->render.i_height != i_height ) ||
183             ( p_vout->render.i_chroma != i_chroma ) ||
184             ( p_vout->render.i_aspect != i_aspect
185                     && !p_vout->b_override_aspect ) ||
186             p_vout->b_filter_change )
187         {
188             /* We are not interested in this format, close this vout */
189             vlc_object_detach( p_vout );
190             vlc_object_release( p_vout );
191             vout_Destroy( p_vout );
192             p_vout = NULL;
193         }
194         else
195         {
196             /* This video output is cool! Hijack it. */
197             vlc_object_detach( p_vout );
198             vlc_object_attach( p_vout, p_this );
199             vlc_object_release( p_vout );
200         }
201     }
202
203     if( !p_vout )
204     {
205         msg_Dbg( p_this, "no usable vout present, spawning one" );
206
207         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
208     }
209
210     return p_vout;
211 }
212
213 /*****************************************************************************
214  * vout_Create: creates a new video output thread
215  *****************************************************************************
216  * This function creates a new video output thread, and returns a pointer
217  * to its description. On error, it returns NULL.
218  *****************************************************************************/
219 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
220                                unsigned int i_width, unsigned int i_height,
221                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
222 {
223     vout_thread_t  * p_vout;                            /* thread descriptor */
224     input_thread_t * p_input_thread;
225     int              i_index;                               /* loop variable */
226     char           * psz_plugin;
227     vlc_value_t      val, text;
228
229     /* Allocate descriptor */
230     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
231     if( p_vout == NULL )
232     {
233         msg_Err( p_parent, "out of memory" );
234         return NULL;
235     }
236
237     /* Initialize pictures and subpictures - translation tables and functions
238      * will be initialized later in InitThread */
239     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
240     {
241         p_vout->p_picture[i_index].pf_lock = NULL;
242         p_vout->p_picture[i_index].pf_unlock = NULL;
243         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
244         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
245     }
246
247     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
248     {
249         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
250         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
251     }
252
253     /* No images in the heap */
254     p_vout->i_heap_size = 0;
255
256     /* Initialize the rendering heap */
257     I_RENDERPICTURES = 0;
258     p_vout->render.i_width    = i_width;
259     p_vout->render.i_height   = i_height;
260     p_vout->render.i_chroma   = i_chroma;
261     p_vout->render.i_aspect   = i_aspect;
262
263     p_vout->render.i_rmask    = 0;
264     p_vout->render.i_gmask    = 0;
265     p_vout->render.i_bmask    = 0;
266
267     p_vout->render.i_last_used_pic = -1;
268     p_vout->render.b_allow_modify_pics = 1;
269
270     /* Zero the output heap */
271     I_OUTPUTPICTURES = 0;
272     p_vout->output.i_width    = 0;
273     p_vout->output.i_height   = 0;
274     p_vout->output.i_chroma   = 0;
275     p_vout->output.i_aspect   = 0;
276
277     p_vout->output.i_rmask    = 0;
278     p_vout->output.i_gmask    = 0;
279     p_vout->output.i_bmask    = 0;
280
281     /* Initialize misc stuff */
282     p_vout->i_changes    = 0;
283     p_vout->f_gamma      = 0;
284     p_vout->b_grayscale  = 0;
285     p_vout->b_info       = 0;
286     p_vout->b_interface  = 0;
287     p_vout->b_scale      = 1;
288     p_vout->b_fullscreen = 0;
289     p_vout->i_alignment  = 0;
290     p_vout->render_time  = 10;
291     p_vout->c_fps_samples = 0;
292     p_vout->b_filter_change = 0;
293
294     /* Mouse coordinates */
295     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
296     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
297     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
298     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
299     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
300
301     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
302     val.b_bool = VLC_TRUE;
303     var_Set( p_vout, "intf-change", val );
304
305     /* Initialize locks */
306     vlc_mutex_init( p_vout, &p_vout->picture_lock );
307     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
308     vlc_mutex_init( p_vout, &p_vout->change_lock );
309
310     /* Attach the new object now so we can use var inheritance below */
311     vlc_object_attach( p_vout, p_parent );
312
313     /* Create a few object variables we'll need later on */
314     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
315     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
316     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
317     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
318     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
319
320     p_vout->b_override_aspect = VLC_FALSE;
321
322     /* If the parent is not a VOUT object, that means we are at the start of
323      * the video output pipe */
324     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
325     {
326         var_Get( p_vout, "aspect-ratio", &val );
327
328         /* Check whether the user tried to override aspect ratio */
329         if( val.psz_string )
330         {
331             unsigned int i_new_aspect = i_aspect;
332             char *psz_parser = strchr( val.psz_string, ':' );
333
334             if( psz_parser )
335             {
336                 *psz_parser++ = '\0';
337                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
338                                                       / atoi( psz_parser );
339             }
340             else
341             {
342                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
343                                        * atof( val.psz_string )
344                                        / i_height;
345             }
346
347             free( val.psz_string );
348
349             if( i_new_aspect && i_new_aspect != i_aspect )
350             {
351                 unsigned int i_aspect_x, i_aspect_y;
352                 
353                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
354
355                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
356                          i_aspect_x, i_aspect_y );
357
358                 p_vout->render.i_aspect = i_new_aspect;
359
360                 p_vout->b_override_aspect = VLC_TRUE;
361             }
362         }
363
364         /* Look for the default filter configuration */
365         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
366         var_Get( p_vout, "filter", &val );
367         p_vout->psz_filter_chain = val.psz_string;
368     }
369     else
370     {
371         /* continue the parent's filter chain */
372         char *psz_end;
373
374         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
375         if( psz_end && *(psz_end+1) )
376             p_vout->psz_filter_chain = strdup( psz_end+1 );
377         else p_vout->psz_filter_chain = NULL;
378     }
379
380     /* Choose the video output module */
381     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
382     {
383         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
384         var_Get( p_vout, "vout", &val );
385         psz_plugin = val.psz_string;
386     }
387     else
388     {
389         /* the filter chain is a string list of filters separated by double
390          * colons */
391         char *psz_end;
392
393         psz_end = strchr( p_vout->psz_filter_chain, ':' );
394         if( psz_end )
395             psz_plugin = strndup( p_vout->psz_filter_chain,
396                                   psz_end - p_vout->psz_filter_chain );
397         else psz_plugin = strdup( p_vout->psz_filter_chain );
398     }
399
400     /* Initialize the dimensions of the video window */
401     InitWindowSize( p_vout, &p_vout->i_window_width,
402                     &p_vout->i_window_height );
403
404     /* Create the vout thread */
405     p_vout->p_module = module_Need( p_vout,
406                            ( p_vout->psz_filter_chain &&
407                                *p_vout->psz_filter_chain ) ?
408                            "video filter" : "video output",
409                            psz_plugin );
410
411     if( psz_plugin ) free( psz_plugin );
412     if( p_vout->p_module == NULL )
413     {
414         msg_Err( p_vout, "no suitable vout module" );
415         vlc_object_destroy( p_vout );
416         return NULL;
417     }
418
419     p_vout->p_text_renderer_module = module_Need( p_vout, "text renderer",
420                                                   NULL );
421     if( p_vout->p_text_renderer_module == NULL )
422     {
423         msg_Warn( p_vout, "no suitable text renderer module" );
424         p_vout->pf_add_string = NULL;
425     }
426
427     /* Create a few object variables for interface interaction */
428     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
429     text.psz_string = _("Fullscreen");
430     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
431     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
432     if( val.b_bool )
433     {
434         /* user requested fullscreen */
435         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
436     }
437     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
438
439     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
440     text.psz_string = _("Deinterlace");
441     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
442     val.psz_string = ""; text.psz_string = _("Disable");
443     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
444     val.psz_string = "discard"; text.psz_string = _("Discard");
445     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
446     val.psz_string = "blend"; text.psz_string = _("Blend");
447     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
448     val.psz_string = "mean"; text.psz_string = _("Mean");
449     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
450     val.psz_string = "bob"; text.psz_string = _("Bob");
451     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
452     val.psz_string = "linear"; text.psz_string = _("Linear");
453     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
454     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
455     {
456         var_Set( p_vout, "deinterlace", val );
457         if( val.psz_string ) free( val.psz_string );
458     }
459     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
460
461
462     var_Create( p_vout, "filter", VLC_VAR_STRING );
463     text.psz_string = _("Filters");
464     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
465     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
466     if( val.psz_string )
467     {
468         var_Set( p_vout, "filter", val );
469         free( val.psz_string );
470     }
471     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
472
473     /* Calculate delay created by internal caching */
474     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
475                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
476     if( p_input_thread )
477     {
478         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
479         vlc_object_release( p_input_thread );
480     }
481     else
482     {
483         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
484     }
485
486     if( vlc_thread_create( p_vout, "video output", RunThread,
487                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
488     {
489         msg_Err( p_vout, "out of memory" );
490         module_Unneed( p_vout, p_vout->p_module );
491         vlc_object_destroy( p_vout );
492         return NULL;
493     }
494
495     return p_vout;
496 }
497
498 /*****************************************************************************
499  * vout_Destroy: destroys a previously created video output
500  *****************************************************************************
501  * Destroy a terminated thread.
502  * The function will request a destruction of the specified thread. If pi_error
503  * is NULL, it will return once the thread is destroyed. Else, it will be
504  * update using one of the THREAD_* constants.
505  *****************************************************************************/
506 void vout_Destroy( vout_thread_t *p_vout )
507
508     vlc_object_t *p_playlist;
509     
510     /* Request thread destruction */
511     p_vout->b_die = VLC_TRUE;
512     vlc_thread_join( p_vout );
513
514     var_Destroy( p_vout, "intf-change" );
515
516     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST, 
517                                   FIND_ANYWHERE );
518
519     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
520
521     /* Free structure */
522     vlc_object_destroy( p_vout );
523
524     /* If it was the last vout, tell the interface to show up */
525     if( p_playlist != NULL )
526     {
527         vout_thread_t *p_another_vout = vlc_object_find( p_playlist, 
528                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
529         if( p_another_vout == NULL )
530         {
531             vlc_value_t val;
532             val.b_bool = VLC_TRUE;
533             var_Set( p_playlist, "intf-show", val );
534         }
535         else
536         {
537             vlc_object_release( p_another_vout );
538         }
539         vlc_object_release( p_playlist );
540     }
541 }
542
543 /*****************************************************************************
544  * InitThread: initialize video output thread
545  *****************************************************************************
546  * This function is called from RunThread and performs the second step of the
547  * initialization. It returns 0 on success. Note that the thread's flag are not
548  * modified inside this function.
549  *****************************************************************************/
550 static int InitThread( vout_thread_t *p_vout )
551 {
552     int i;
553     unsigned int i_aspect_x, i_aspect_y;
554
555     vlc_mutex_lock( &p_vout->change_lock );
556
557 #ifdef STATS
558     p_vout->c_loops = 0;
559 #endif
560
561     /* Initialize output method, it allocates direct buffers for us */
562     if( p_vout->pf_init( p_vout ) )
563     {
564         vlc_mutex_unlock( &p_vout->change_lock );
565         return VLC_EGENERIC;
566     }
567
568     if( !I_OUTPUTPICTURES )
569     {
570         msg_Err( p_vout, "plugin was unable to allocate at least "
571                          "one direct buffer" );
572         p_vout->pf_end( p_vout );
573         vlc_mutex_unlock( &p_vout->change_lock );
574         return VLC_EGENERIC;
575     }
576
577     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
578     {
579         msg_Err( p_vout, "plugin allocated too many direct buffers, "
580                          "our internal buffers must have overflown." );
581         p_vout->pf_end( p_vout );
582         vlc_mutex_unlock( &p_vout->change_lock );
583         return VLC_EGENERIC;
584     }
585
586     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
587
588 #if 0
589     if( !p_vout->psz_filter_chain )
590     {
591         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
592
593         if( psz_aspect )
594         {
595             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
596                                                       * atof( psz_aspect )
597                                                       / p_vout->output.i_height;
598             free( psz_aspect );
599
600             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
601             {
602                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
603
604                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
605                          i_aspect_x, i_aspect_y );
606                 p_vout->output.i_aspect = i_new_aspect;
607             }
608         }
609     }
610 #endif
611
612     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
613     msg_Dbg( p_vout,
614              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
615              p_vout->render.i_width, p_vout->render.i_height,
616              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
617              i_aspect_x, i_aspect_y );
618
619     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
620     msg_Dbg( p_vout,
621              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
622              p_vout->output.i_width, p_vout->output.i_height,
623              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
624              i_aspect_x, i_aspect_y );
625
626     /* Calculate shifts from system-updated masks */
627     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
628                  p_vout->output.i_rmask );
629     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
630                  p_vout->output.i_gmask );
631     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
632                  p_vout->output.i_bmask );
633
634     /* Check whether we managed to create direct buffers similar to
635      * the render buffers, ie same size and chroma */
636     if( ( p_vout->output.i_width == p_vout->render.i_width )
637      && ( p_vout->output.i_height == p_vout->render.i_height )
638      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
639     {
640         /* Cool ! We have direct buffers, we can ask the decoder to
641          * directly decode into them ! Map the first render buffers to
642          * the first direct buffers, but keep the first direct buffer
643          * for memcpy operations */
644         p_vout->b_direct = 1;
645
646         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
647         {
648             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
649                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
650                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
651             {
652                 /* We have enough direct buffers so there's no need to
653                  * try to use system memory buffers. */
654                 break;
655             }
656             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
657             I_RENDERPICTURES++;
658         }
659
660         msg_Dbg( p_vout, "direct render, mapping "
661                  "render pictures 0-%i to system pictures 1-%i",
662                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
663     }
664     else
665     {
666         /* Rats... Something is wrong here, we could not find an output
667          * plugin able to directly render what we decode. See if we can
668          * find a chroma plugin to do the conversion */
669         p_vout->b_direct = 0;
670
671         /* Choose the best module */
672         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
673
674         if( p_vout->chroma.p_module == NULL )
675         {
676             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
677                      (char*)&p_vout->render.i_chroma,
678                      (char*)&p_vout->output.i_chroma );
679             p_vout->pf_end( p_vout );
680             vlc_mutex_unlock( &p_vout->change_lock );
681             return VLC_EGENERIC;
682         }
683
684         msg_Dbg( p_vout, "indirect render, mapping "
685                  "render pictures 0-%i to system pictures %i-%i",
686                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
687                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
688
689         /* Append render buffers after the direct buffers */
690         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
691         {
692             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
693             I_RENDERPICTURES++;
694
695             /* Check if we have enough render pictures */
696             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
697                 break;
698         }
699     }
700
701     /* Link pictures back to their heap */
702     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
703     {
704         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
705     }
706
707     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
708     {
709         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
710     }
711
712 /* XXX XXX mark thread ready */
713     return VLC_SUCCESS;
714 }
715
716 /*****************************************************************************
717  * RunThread: video output thread
718  *****************************************************************************
719  * Video output thread. This function does only returns when the thread is
720  * terminated. It handles the pictures arriving in the video heap and the
721  * display device events.
722  *****************************************************************************/
723 static void RunThread( vout_thread_t *p_vout)
724 {
725     int             i_index;                                /* index in heap */
726     int             i_idle_loops = 0;  /* loops without displaying a picture */
727     mtime_t         current_date;                            /* current date */
728     mtime_t         display_date;                            /* display date */
729
730     picture_t *     p_picture;                            /* picture pointer */
731     picture_t *     p_last_picture = NULL;                   /* last picture */
732     picture_t *     p_directbuffer;              /* direct buffer to display */
733
734     subpicture_t *  p_subpic;                          /* subpicture pointer */
735
736     /*
737      * Initialize thread
738      */
739     p_vout->b_error = InitThread( p_vout );
740
741     /* signal the creation of the vout */
742     vlc_thread_ready( p_vout );
743
744     if( p_vout->b_error )
745     {
746         /* Destroy thread structures allocated by Create and InitThread */
747         DestroyThread( p_vout );
748         return;
749     }
750
751     /*
752      * Main loop - it is not executed if an error occured during
753      * initialization
754      */
755     while( (!p_vout->b_die) && (!p_vout->b_error) )
756     {
757         /* Initialize loop variables */
758         p_picture = NULL;
759         display_date = 0;
760         current_date = mdate();
761
762 #if 0
763         p_vout->c_loops++;
764         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
765         {
766             msg_Dbg( p_vout, "picture heap: %d/%d",
767                      I_RENDERPICTURES, p_vout->i_heap_size );
768         }
769 #endif
770
771         /*
772          * Find the picture to display (the one with the earliest date).
773          * This operation does not need lock, since only READY_PICTUREs
774          * are handled. */
775         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
776         {
777             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
778                 && ( (p_picture == NULL) ||
779                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
780             {
781                 p_picture = PP_RENDERPICTURE[i_index];
782                 display_date = p_picture->date;
783             }
784         }
785
786         if( p_picture )
787         {
788             /* If we met the last picture, parse again to see whether there is
789              * a more appropriate one. */
790             if( p_picture == p_last_picture )
791             {
792                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
793                 {
794                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
795                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
796                         && ((p_picture == p_last_picture) ||
797                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
798                     {
799                         p_picture = PP_RENDERPICTURE[i_index];
800                         display_date = p_picture->date;
801                     }
802                 }
803             }
804
805             /* If we found better than the last picture, destroy it */
806             if( p_last_picture && p_picture != p_last_picture )
807             {
808                 vlc_mutex_lock( &p_vout->picture_lock );
809                 if( p_last_picture->i_refcount )
810                 {
811                     p_last_picture->i_status = DISPLAYED_PICTURE;
812                 }
813                 else
814                 {
815                     p_last_picture->i_status = DESTROYED_PICTURE;
816                     p_vout->i_heap_size--;
817                 }
818                 vlc_mutex_unlock( &p_vout->picture_lock );
819                 p_last_picture = NULL;
820             }
821
822             /* Compute FPS rate */
823             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
824                 = display_date;
825
826             if( !p_picture->b_force &&
827                 p_picture != p_last_picture &&
828                 display_date < current_date + p_vout->render_time )
829             {
830                 /* Picture is late: it will be destroyed and the thread
831                  * will directly choose the next picture */
832                 vlc_mutex_lock( &p_vout->picture_lock );
833                 if( p_picture->i_refcount )
834                 {
835                     /* Pretend we displayed the picture, but don't destroy
836                      * it since the decoder might still need it. */
837                     p_picture->i_status = DISPLAYED_PICTURE;
838                 }
839                 else
840                 {
841                     /* Destroy the picture without displaying it */
842                     p_picture->i_status = DESTROYED_PICTURE;
843                     p_vout->i_heap_size--;
844                 }
845                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
846                                   current_date - display_date );
847                 vlc_mutex_unlock( &p_vout->picture_lock );
848
849                 continue;
850             }
851
852             if( display_date >
853                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
854             {
855                 /* Picture is waaay too early: it will be destroyed */
856                 vlc_mutex_lock( &p_vout->picture_lock );
857                 if( p_picture->i_refcount )
858                 {
859                     /* Pretend we displayed the picture, but don't destroy
860                      * it since the decoder might still need it. */
861                     p_picture->i_status = DISPLAYED_PICTURE;
862                 }
863                 else
864                 {
865                     /* Destroy the picture without displaying it */
866                     p_picture->i_status = DESTROYED_PICTURE;
867                     p_vout->i_heap_size--;
868                 }
869                 msg_Warn( p_vout, "vout warning: early picture skipped "
870                           "("I64Fd")", display_date - current_date
871                           - p_vout->i_pts_delay );
872                 vlc_mutex_unlock( &p_vout->picture_lock );
873
874                 continue;
875             }
876
877             if( display_date > current_date + VOUT_DISPLAY_DELAY )
878             {
879                 /* A picture is ready to be rendered, but its rendering date
880                  * is far from the current one so the thread will perform an
881                  * empty loop as if no picture were found. The picture state
882                  * is unchanged */
883                 p_picture    = NULL;
884                 display_date = 0;
885             }
886             else if( p_picture == p_last_picture )
887             {
888                 /* We are asked to repeat the previous picture, but we first
889                  * wait for a couple of idle loops */
890                 if( i_idle_loops < 4 )
891                 {
892                     p_picture    = NULL;
893                     display_date = 0;
894                 }
895                 else
896                 {
897                     /* We set the display date to something high, otherwise
898                      * we'll have lots of problems with late pictures */
899                     display_date = current_date + p_vout->render_time;
900                 }
901             }
902         }
903
904         if( p_picture == NULL )
905         {
906             i_idle_loops++;
907         }
908
909         /*
910          * Check for subpictures to display
911          */
912         p_subpic = vout_SortSubPictures( p_vout, display_date );
913
914         /*
915          * Perform rendering
916          */
917         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
918
919         /*
920          * Call the plugin-specific rendering method if there is one
921          */
922         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
923         {
924             /* Render the direct buffer returned by vout_RenderPicture */
925             p_vout->pf_render( p_vout, p_directbuffer );
926         }
927
928         /*
929          * Sleep, wake up
930          */
931         if( display_date != 0 && p_directbuffer != NULL )
932         {
933             mtime_t current_render_time = mdate() - current_date;
934             /* if render time is very large we don't include it in the mean */
935             if( current_render_time < p_vout->render_time +
936                 VOUT_DISPLAY_DELAY )
937             {
938                 /* Store render time using a sliding mean weighting to
939                  * current value in a 3 to 1 ratio*/
940                 p_vout->render_time *= 3;
941                 p_vout->render_time += current_render_time;
942                 p_vout->render_time >>= 2;
943             }
944         }
945
946         /* Give back change lock */
947         vlc_mutex_unlock( &p_vout->change_lock );
948
949         /* Sleep a while or until a given date */
950         if( display_date != 0 )
951         {
952             /* If there are filters in the chain, better give them the picture
953              * in advance */
954             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
955             {
956                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
957             }
958         }
959         else
960         {
961             msleep( VOUT_IDLE_SLEEP );
962         }
963
964         /* On awakening, take back lock and send immediately picture
965          * to display. */
966         vlc_mutex_lock( &p_vout->change_lock );
967
968         /*
969          * Display the previously rendered picture
970          */
971         if( p_picture != NULL && p_directbuffer != NULL )
972         {
973             /* Display the direct buffer returned by vout_RenderPicture */
974             if( p_vout->pf_display )
975             {
976                 p_vout->pf_display( p_vout, p_directbuffer );
977             }
978
979             /* Reinitialize idle loop count */
980             i_idle_loops = 0;
981
982             /* Tell the vout this was the last picture and that it does not
983              * need to be forced anymore. */
984             p_last_picture = p_picture;
985             p_last_picture->b_force = 0;
986         }
987
988         /*
989          * Check events and manage thread
990          */
991         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
992         {
993             /* A fatal error occured, and the thread must terminate
994              * immediately, without displaying anything - setting b_error to 1
995              * causes the immediate end of the main while() loop. */
996             p_vout->b_error = 1;
997         }
998
999         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
1000         {
1001             /* this must only happen when the vout plugin is incapable of
1002              * rescaling the picture itself. In this case we need to destroy
1003              * the current picture buffers and recreate new ones with the right
1004              * dimensions */
1005             int i;
1006
1007             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1008
1009             p_vout->pf_end( p_vout );
1010             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1011                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1012
1013             I_OUTPUTPICTURES = 0;
1014             if( p_vout->pf_init( p_vout ) )
1015             {
1016                 msg_Err( p_vout, "cannot resize display" );
1017                 /* FIXME: pf_end will be called again in EndThread() */
1018                 p_vout->b_error = 1;
1019             }
1020
1021             /* Need to reinitialise the chroma plugin */
1022             if( p_vout->chroma.p_module )
1023             {
1024                 if( p_vout->chroma.p_module->pf_deactivate )
1025                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1026                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1027             }
1028         }
1029
1030         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1031         {
1032             /* This happens when the picture buffers need to be recreated.
1033              * This is useful on multimonitor displays for instance.
1034              *
1035              * Warning: This only works when the vout creates only 1 picture
1036              * buffer!! */
1037             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1038
1039             if( !p_vout->b_direct )
1040             {
1041                 module_Unneed( p_vout, p_vout->chroma.p_module );
1042             }
1043
1044             vlc_mutex_lock( &p_vout->picture_lock );
1045
1046             p_vout->pf_end( p_vout );
1047
1048             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1049
1050             p_vout->b_error = InitThread( p_vout );
1051
1052             vlc_mutex_unlock( &p_vout->picture_lock );
1053         }
1054     }
1055
1056     /*
1057      * Error loop - wait until the thread destruction is requested
1058      */
1059     if( p_vout->b_error )
1060     {
1061         ErrorThread( p_vout );
1062     }
1063
1064     /* End of thread */
1065     EndThread( p_vout );
1066
1067     /* Destroy thread structures allocated by CreateThread */
1068     DestroyThread( p_vout );
1069 }
1070
1071 /*****************************************************************************
1072  * ErrorThread: RunThread() error loop
1073  *****************************************************************************
1074  * This function is called when an error occured during thread main's loop. The
1075  * thread can still receive feed, but must be ready to terminate as soon as
1076  * possible.
1077  *****************************************************************************/
1078 static void ErrorThread( vout_thread_t *p_vout )
1079 {
1080     /* Wait until a `die' order */
1081     while( !p_vout->b_die )
1082     {
1083         /* Sleep a while */
1084         msleep( VOUT_IDLE_SLEEP );
1085     }
1086 }
1087
1088 /*****************************************************************************
1089  * EndThread: thread destruction
1090  *****************************************************************************
1091  * This function is called when the thread ends after a sucessful
1092  * initialization. It frees all ressources allocated by InitThread.
1093  *****************************************************************************/
1094 static void EndThread( vout_thread_t *p_vout )
1095 {
1096     int     i_index;                                        /* index in heap */
1097
1098 #ifdef STATS
1099     {
1100         struct tms cpu_usage;
1101         times( &cpu_usage );
1102
1103         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1104                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1105     }
1106 #endif
1107
1108     if( !p_vout->b_direct )
1109     {
1110         module_Unneed( p_vout, p_vout->chroma.p_module );
1111     }
1112     
1113     /* Destroy all remaining pictures */
1114     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1115     {
1116         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1117         {
1118             free( p_vout->p_picture[i_index].p_data_orig );
1119         }
1120     }
1121
1122     /* Destroy all remaining subpictures */
1123     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1124     {
1125         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1126         {
1127             vout_DestroySubPicture( p_vout,
1128                                     &p_vout->p_subpicture[i_index] );
1129         }
1130     }
1131
1132     if( p_vout->p_text_renderer_module )
1133         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1134     
1135     /* Destroy translation tables */
1136     p_vout->pf_end( p_vout );
1137
1138     /* Release the change lock */
1139     vlc_mutex_unlock( &p_vout->change_lock );
1140 }
1141
1142 /*****************************************************************************
1143  * DestroyThread: thread destruction
1144  *****************************************************************************
1145  * This function is called when the thread ends. It frees all ressources
1146  * allocated by CreateThread. Status is available at this stage.
1147  *****************************************************************************/
1148 static void DestroyThread( vout_thread_t *p_vout )
1149 {
1150     /* Destroy the locks */
1151     vlc_mutex_destroy( &p_vout->picture_lock );
1152     vlc_mutex_destroy( &p_vout->subpicture_lock );
1153     vlc_mutex_destroy( &p_vout->change_lock );
1154
1155     /* Release the module */
1156     module_Unneed( p_vout, p_vout->p_module );
1157 }
1158
1159 /* following functions are local */
1160
1161 static int ReduceHeight( int i_ratio )
1162 {
1163     int i_dummy = VOUT_ASPECT_FACTOR;
1164     int i_pgcd  = 1;
1165  
1166     if( !i_ratio )
1167     {
1168         return i_pgcd;
1169     }
1170
1171     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1172     while( !(i_ratio & 1) && !(i_dummy & 1) )
1173     {
1174         i_ratio >>= 1;
1175         i_dummy >>= 1;
1176         i_pgcd  <<= 1;
1177     }
1178
1179     while( !(i_ratio % 3) && !(i_dummy % 3) )
1180     {
1181         i_ratio /= 3;
1182         i_dummy /= 3;
1183         i_pgcd  *= 3;
1184     }
1185
1186     while( !(i_ratio % 5) && !(i_dummy % 5) )
1187     {
1188         i_ratio /= 5;
1189         i_dummy /= 5;
1190         i_pgcd  *= 5;
1191     }
1192
1193     return i_pgcd;
1194 }
1195
1196 /*****************************************************************************
1197  * BinaryLog: computes the base 2 log of a binary value
1198  *****************************************************************************
1199  * This functions is used by MaskToShift, to get a bit index from a binary
1200  * value.
1201  *****************************************************************************/
1202 static int BinaryLog( uint32_t i )
1203 {
1204     int i_log = 0;
1205
1206     if( i == 0 ) return -31337;
1207
1208     if( i & 0xffff0000 ) i_log += 16;
1209     if( i & 0xff00ff00 ) i_log += 8;
1210     if( i & 0xf0f0f0f0 ) i_log += 4;
1211     if( i & 0xcccccccc ) i_log += 2;
1212     if( i & 0xaaaaaaaa ) i_log += 1;
1213
1214     return i_log;
1215 }
1216
1217 /*****************************************************************************
1218  * MaskToShift: transform a color mask into right and left shifts
1219  *****************************************************************************
1220  * This function is used for obtaining color shifts from masks.
1221  *****************************************************************************/
1222 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1223 {
1224     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1225
1226     if( !i_mask )
1227     {
1228         *pi_left = *pi_right = 0;
1229         return;
1230     }
1231
1232     /* Get bits */
1233     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1234     i_high = i_mask + i_low;                       /* higher bit of the mask */
1235
1236     /* Transform bits into an index */
1237     i_low =  BinaryLog (i_low);
1238     i_high = BinaryLog (i_high);
1239
1240     /* Update pointers and return */
1241     *pi_left =   i_low;
1242     *pi_right = (8 - i_high + i_low);
1243 }
1244
1245 /*****************************************************************************
1246  * InitWindowSize: find the initial dimensions the video window should have.
1247  *****************************************************************************
1248  * This function will check the "width", "height" and "zoom" config options and
1249  * will calculate the size that the video window should have.
1250  *****************************************************************************/
1251 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1252                             int *pi_height )
1253 {
1254     vlc_value_t val;
1255     int i_width, i_height;
1256     uint64_t ll_zoom;
1257
1258 #define FP_FACTOR 1000                             /* our fixed point factor */
1259
1260     var_Get( p_vout, "align", &val );
1261     p_vout->i_alignment = val.i_int;
1262
1263     var_Get( p_vout, "width", &val );
1264     i_width = val.i_int;
1265     var_Get( p_vout, "height", &val );
1266     i_height = val.i_int;
1267     var_Get( p_vout, "zoom", &val );
1268     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1269
1270     if( i_width > 0 && i_height > 0)
1271     {
1272         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1273         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1274         return;
1275     }
1276     else if( i_width > 0 )
1277     {
1278         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1279         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1280                             p_vout->render.i_aspect / FP_FACTOR );
1281         return;
1282     }
1283     else if( i_height > 0 )
1284     {
1285         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1286         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1287                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1288         return;
1289     }
1290
1291     if( p_vout->render.i_height * p_vout->render.i_aspect
1292         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1293     {
1294         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1295           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1296         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1297     }
1298     else
1299     {
1300         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1301         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1302           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1303     }
1304
1305 #undef FP_FACTOR
1306 }
1307
1308 /*****************************************************************************
1309  * vout_VarCallback: generic callback for intf variables
1310  *****************************************************************************/
1311 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1312                       vlc_value_t old_value, vlc_value_t new_value,
1313                       void * unused )
1314 {
1315     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1316     vlc_value_t val;
1317     val.b_bool = VLC_TRUE;
1318     var_Set( p_vout, "intf-change", val );
1319     return VLC_SUCCESS;
1320 }
1321
1322 /*****************************************************************************
1323  * object variables callbacks: a bunch of object variables are used by the
1324  * interfaces to interact with the vout.
1325  *****************************************************************************/
1326 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1327                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1328 {
1329     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1330     input_thread_t *p_input;
1331     vlc_value_t val;
1332
1333     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1334
1335     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1336                                                  FIND_PARENT );
1337     if( p_input )
1338     {
1339         /* Modify input as well because the vout might have to be restarted */
1340         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1341         var_Set( p_input, "fullscreen", newval );
1342
1343         vlc_object_release( p_input );
1344     }
1345
1346     val.b_bool = VLC_TRUE;
1347     var_Set( p_vout, "intf-change", val );
1348     return VLC_SUCCESS;
1349 }
1350
1351 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1352                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1353 {
1354     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1355     input_thread_t *p_input;
1356     vlc_value_t val;
1357
1358     char *psz_mode = newval.psz_string;
1359     char *psz_filter;
1360     unsigned int  i;
1361
1362     psz_filter = config_GetPsz( p_vout, "filter" );
1363
1364     if( !psz_mode || !*psz_mode )
1365     {
1366         config_PutPsz( p_vout, "filter", "" );
1367     }
1368     else
1369     {
1370         if( !psz_filter || !*psz_filter )
1371         {
1372             config_PutPsz( p_vout, "filter", "deinterlace" );
1373         }
1374         else
1375         {
1376             if( strstr( psz_filter, "deinterlace" ) == NULL )
1377             {
1378                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1379                 strcat( psz_filter, ",deinterlace" );
1380             }
1381             config_PutPsz( p_vout, "filter", psz_filter );
1382         }
1383     }
1384
1385     if( psz_filter ) free( psz_filter );
1386
1387
1388     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1389                                                  FIND_PARENT );
1390     if( !p_input ) return VLC_EGENERIC;
1391
1392     if( psz_mode && *psz_mode )
1393     {
1394         val.psz_string = psz_mode;
1395         var_Set( p_vout, "deinterlace-mode", val );
1396         /* Modify input as well because the vout might have to be restarted */
1397         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1398         var_Set( p_input, "deinterlace-mode", val );
1399     }
1400
1401     /* now restart all video streams */
1402     vlc_mutex_lock( &p_input->stream.stream_lock );
1403
1404     p_vout->b_filter_change = VLC_TRUE;
1405
1406 #define ES p_input->stream.pp_es[i]
1407
1408     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1409     {
1410         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1411         {
1412             input_UnselectES( p_input, ES );
1413             input_SelectES( p_input, ES );
1414         }
1415 #undef ES
1416     }
1417     vlc_mutex_unlock( &p_input->stream.stream_lock );
1418
1419     vlc_object_release( p_input );
1420
1421     val.b_bool = VLC_TRUE;
1422     var_Set( p_vout, "intf-change", val );
1423     return VLC_SUCCESS;
1424 }
1425
1426 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1427                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1428 {
1429     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1430     input_thread_t *p_input;
1431     vlc_value_t val;
1432     unsigned int i;
1433
1434     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1435                                                  FIND_PARENT );
1436
1437     if (!p_input)
1438     {
1439         msg_Err( p_vout, "Input not found" );
1440         return( VLC_EGENERIC );
1441     }
1442     /* Restart the video stream */
1443     vlc_mutex_lock( &p_input->stream.stream_lock );
1444
1445     p_vout->b_filter_change = VLC_TRUE;
1446
1447 #define ES p_input->stream.pp_es[i]
1448
1449     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1450     {
1451         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1452         {
1453             input_UnselectES( p_input, ES );
1454             input_SelectES( p_input, ES );
1455         }
1456 #undef ES
1457     }
1458     vlc_mutex_unlock( &p_input->stream.stream_lock );
1459
1460     vlc_object_release( p_input );
1461
1462     val.b_bool = VLC_TRUE;
1463     var_Set( p_vout, "intf-change", val );
1464     return VLC_SUCCESS;
1465 }
1466