* include/video_output.h, ALL: changed api for vout_Request()/vout_Create() to be...
[vlc.git] / src / video_output / video_output.c
1 /*****************************************************************************
2  * video_output.c : video output thread
3  *
4  * This module describes the programming interface for video output threads.
5  * It includes functions allowing to open a new thread, send pictures to a
6  * thread, and destroy a previously oppened video output thread.
7  *****************************************************************************
8  * Copyright (C) 2000-2004 VideoLAN
9  * $Id$
10  *
11  * Authors: Vincent Seguin <seguin@via.ecp.fr>
12  *          Gildas Bazin <gbazin@videolan.org>
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License as published by
16  * the Free Software Foundation; either version 2 of the License, or
17  * (at your option) any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, write to the Free Software
26  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
27  *****************************************************************************/
28
29 /*****************************************************************************
30  * Preamble
31  *****************************************************************************/
32 #include <stdlib.h>                                                /* free() */
33
34 #include <vlc/vlc.h>
35
36 #ifdef HAVE_SYS_TIMES_H
37 #   include <sys/times.h>
38 #endif
39
40 #include "vlc_video.h"
41 #include "video_output.h"
42 #include "vlc_spu.h"
43 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
44
45 #if defined( SYS_DARWIN )
46 #include "darwin_specific.h"
47 #endif
48
49 /*****************************************************************************
50  * Local prototypes
51  *****************************************************************************/
52 static int      InitThread        ( vout_thread_t * );
53 static void     RunThread         ( vout_thread_t * );
54 static void     ErrorThread       ( vout_thread_t * );
55 static void     EndThread         ( vout_thread_t * );
56 static void     DestroyThread     ( vout_thread_t * );
57
58 static void     AspectRatio       ( int, int *, int * );
59 static int      BinaryLog         ( uint32_t );
60 static void     MaskToShift       ( int *, int *, uint32_t );
61 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
62
63 /* Object variables callbacks */
64 static int DeinterlaceCallback( vlc_object_t *, char const *,
65                                 vlc_value_t, vlc_value_t, void * );
66 static int FilterCallback( vlc_object_t *, char const *,
67                            vlc_value_t, vlc_value_t, void * );
68
69 /* From vout_intf.c */
70 int vout_Snapshot( vout_thread_t *, picture_t * );
71
72 /*****************************************************************************
73  * vout_Request: find a video output thread, create one, or destroy one.
74  *****************************************************************************
75  * This function looks for a video output thread matching the current
76  * properties. If not found, it spawns a new one.
77  *****************************************************************************/
78 vout_thread_t *__vout_Request( vlc_object_t *p_this, vout_thread_t *p_vout,
79                                video_format_t *p_fmt )
80 {
81     if( !p_fmt )
82     {
83         /* Reattach video output to input before bailing out */
84         if( p_vout )
85         {
86             vlc_object_t *p_playlist;
87
88             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
89                                           FIND_ANYWHERE );
90
91             if( p_playlist )
92             {
93                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
94                 vlc_object_detach( p_vout );
95                 vlc_object_attach( p_vout, p_playlist );
96
97                 vlc_object_release( p_playlist );
98             }
99             else
100             {
101                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
102                 vlc_object_detach( p_vout );
103                 vout_Destroy( p_vout );
104             }
105         }
106         return NULL;
107     }
108
109     /* If a video output was provided, lock it, otherwise look for one. */
110     if( p_vout )
111     {
112         vlc_object_yield( p_vout );
113     }
114     else
115     {
116         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
117
118         if( !p_vout )
119         {
120             vlc_object_t *p_playlist;
121
122             p_playlist = vlc_object_find( p_this,
123                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
124             if( p_playlist )
125             {
126                 p_vout = vlc_object_find( p_playlist,
127                                           VLC_OBJECT_VOUT, FIND_CHILD );
128                 /* only first children of p_input for unused vout */
129                 if( p_vout && p_vout->p_parent != p_playlist )
130                 {
131                     vlc_object_release( p_vout );
132                     p_vout = NULL;
133                 }
134                 vlc_object_release( p_playlist );
135             }
136         }
137     }
138
139     /* If we now have a video output, check it has the right properties */
140     if( p_vout )
141     {
142         char *psz_filter_chain;
143         vlc_value_t val;
144
145         /* We don't directly check for the "filter" variable for obvious
146          * performance reasons. */
147         if( p_vout->b_filter_change )
148         {
149             var_Get( p_vout, "filter", &val );
150             psz_filter_chain = val.psz_string;
151
152             if( psz_filter_chain && !*psz_filter_chain )
153             {
154                 free( psz_filter_chain );
155                 psz_filter_chain = NULL;
156             }
157             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
158             {
159                 free( p_vout->psz_filter_chain );
160                 p_vout->psz_filter_chain = NULL;
161             }
162
163             if( !psz_filter_chain && !p_vout->psz_filter_chain )
164             {
165                 p_vout->b_filter_change = VLC_FALSE;
166             }
167
168             if( psz_filter_chain ) free( psz_filter_chain );
169         }
170
171         if( ( p_vout->fmt_render.i_width != p_fmt->i_width ) ||
172             ( p_vout->fmt_render.i_height != p_fmt->i_height ) ||
173             ( p_vout->fmt_render.i_chroma != p_fmt->i_chroma ) ||
174             ( p_vout->fmt_render.i_aspect != p_fmt->i_aspect
175                     && !p_vout->b_override_aspect ) ||
176             p_vout->b_filter_change )
177         {
178             /* We are not interested in this format, close this vout */
179             vlc_object_detach( p_vout );
180             vlc_object_release( p_vout );
181             vout_Destroy( p_vout );
182             p_vout = NULL;
183         }
184         else
185         {
186             /* This video output is cool! Hijack it. */
187             vlc_object_detach( p_vout );
188             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
189             vlc_object_attach( p_vout, p_this );
190             vlc_object_release( p_vout );
191         }
192     }
193
194     if( !p_vout )
195     {
196         msg_Dbg( p_this, "no usable vout present, spawning one" );
197
198         p_vout = vout_Create( p_this, p_fmt );
199     }
200
201     return p_vout;
202 }
203
204 /*****************************************************************************
205  * vout_Create: creates a new video output thread
206  *****************************************************************************
207  * This function creates a new video output thread, and returns a pointer
208  * to its description. On error, it returns NULL.
209  *****************************************************************************/
210 vout_thread_t * __vout_Create( vlc_object_t *p_parent, video_format_t *p_fmt )
211 {
212     vout_thread_t  * p_vout;                            /* thread descriptor */
213     input_thread_t * p_input_thread;
214     int              i_index;                               /* loop variable */
215     char           * psz_plugin;
216     vlc_value_t      val, text;
217
218     unsigned int i_width = p_fmt->i_width;
219     unsigned int i_height = p_fmt->i_height;
220     vlc_fourcc_t i_chroma = p_fmt->i_chroma;
221     unsigned int i_aspect = p_fmt->i_aspect;
222
223     /* Allocate descriptor */
224     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
225     if( p_vout == NULL )
226     {
227         msg_Err( p_parent, "out of memory" );
228         return NULL;
229     }
230
231     /* Initialize pictures - translation tables and functions
232      * will be initialized later in InitThread */
233     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
234     {
235         p_vout->p_picture[i_index].pf_lock = NULL;
236         p_vout->p_picture[i_index].pf_unlock = NULL;
237         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
238         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
239         p_vout->p_picture[i_index].b_slow   = 0;
240     }
241
242     /* No images in the heap */
243     p_vout->i_heap_size = 0;
244
245     /* Initialize the rendering heap */
246     I_RENDERPICTURES = 0;
247     p_vout->fmt_render        = *p_fmt;   /* FIXME palette */
248     p_vout->fmt_in            = *p_fmt;   /* FIXME palette */
249     p_vout->render.i_width    = i_width;
250     p_vout->render.i_height   = i_height;
251     p_vout->render.i_chroma   = i_chroma;
252     p_vout->render.i_aspect   = i_aspect;
253
254     p_vout->render.i_rmask    = 0;
255     p_vout->render.i_gmask    = 0;
256     p_vout->render.i_bmask    = 0;
257
258     p_vout->render.i_last_used_pic = -1;
259     p_vout->render.b_allow_modify_pics = 1;
260
261     /* Zero the output heap */
262     I_OUTPUTPICTURES = 0;
263     p_vout->output.i_width    = 0;
264     p_vout->output.i_height   = 0;
265     p_vout->output.i_chroma   = 0;
266     p_vout->output.i_aspect   = 0;
267
268     p_vout->output.i_rmask    = 0;
269     p_vout->output.i_gmask    = 0;
270     p_vout->output.i_bmask    = 0;
271
272     /* Initialize misc stuff */
273     p_vout->i_changes    = 0;
274     p_vout->f_gamma      = 0;
275     p_vout->b_grayscale  = 0;
276     p_vout->b_info       = 0;
277     p_vout->b_interface  = 0;
278     p_vout->b_scale      = 1;
279     p_vout->b_fullscreen = 0;
280     p_vout->i_alignment  = 0;
281     p_vout->render_time  = 10;
282     p_vout->c_fps_samples = 0;
283     p_vout->b_filter_change = 0;
284     p_vout->pf_control = 0;
285     p_vout->p_parent_intf = 0;
286
287     /* Initialize locks */
288     vlc_mutex_init( p_vout, &p_vout->picture_lock );
289     vlc_mutex_init( p_vout, &p_vout->change_lock );
290
291     /* Mouse coordinates */
292     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
293     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
294     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
295     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
296     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
297
298     /* Initialize subpicture unit */
299     p_vout->p_spu = spu_Create( p_vout );
300     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
301
302     /* Attach the new object now so we can use var inheritance below */
303     vlc_object_attach( p_vout, p_parent );
304
305     spu_Init( p_vout->p_spu );
306
307     /* Take care of some "interface/control" related initialisations */
308     vout_IntfInit( p_vout );
309
310     p_vout->b_override_aspect = VLC_FALSE;
311
312     /* If the parent is not a VOUT object, that means we are at the start of
313      * the video output pipe */
314     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
315     {
316         var_Get( p_vout, "aspect-ratio", &val );
317
318         /* Check whether the user tried to override aspect ratio */
319         if( val.psz_string )
320         {
321             unsigned int i_new_aspect = i_aspect;
322             char *psz_parser = strchr( val.psz_string, ':' );
323
324             if( psz_parser )
325             {
326                 *psz_parser++ = '\0';
327                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
328                                                       / atoi( psz_parser );
329             }
330             else
331             {
332                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
333                                        * atof( val.psz_string )
334                                        / i_height;
335             }
336
337             free( val.psz_string );
338
339             if( i_new_aspect && i_new_aspect != i_aspect )
340             {
341                 int i_aspect_x, i_aspect_y;
342
343                 AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
344
345                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
346                          i_aspect_x, i_aspect_y );
347
348                 p_vout->render.i_aspect = i_new_aspect;
349
350                 p_vout->b_override_aspect = VLC_TRUE;
351             }
352         }
353
354         /* Look for the default filter configuration */
355         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
356         var_Get( p_vout, "filter", &val );
357         p_vout->psz_filter_chain = val.psz_string;
358     }
359     else
360     {
361         /* continue the parent's filter chain */
362         char *psz_end;
363
364         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ',' );
365         if( psz_end && *(psz_end+1) )
366             p_vout->psz_filter_chain = strdup( psz_end+1 );
367         else p_vout->psz_filter_chain = NULL;
368     }
369
370     /* Choose the video output module */
371     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
372     {
373         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
374         var_Get( p_vout, "vout", &val );
375         psz_plugin = val.psz_string;
376     }
377     else
378     {
379         /* the filter chain is a string list of filters separated by double
380          * colons */
381         char *psz_end;
382
383         psz_end = strchr( p_vout->psz_filter_chain, ',' );
384         if( psz_end )
385             psz_plugin = strndup( p_vout->psz_filter_chain,
386                                   psz_end - p_vout->psz_filter_chain );
387         else psz_plugin = strdup( p_vout->psz_filter_chain );
388     }
389
390     /* Initialize the dimensions of the video window */
391     InitWindowSize( p_vout, &p_vout->i_window_width,
392                     &p_vout->i_window_height );
393
394     /* Create the vout thread */
395     p_vout->p_module = module_Need( p_vout,
396         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
397         "video filter" : "video output", psz_plugin, 0 );
398
399     if( psz_plugin ) free( psz_plugin );
400     if( p_vout->p_module == NULL )
401     {
402         msg_Err( p_vout, "no suitable vout module" );
403         vlc_object_detach( p_vout );
404         vlc_object_destroy( p_vout );
405         return NULL;
406     }
407
408     /* Create a few object variables for interface interaction */
409     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
410     text.psz_string = _("Deinterlace");
411     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
412     val.psz_string = ""; text.psz_string = _("Disable");
413     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
414     val.psz_string = "discard"; text.psz_string = _("Discard");
415     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
416     val.psz_string = "blend"; text.psz_string = _("Blend");
417     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
418     val.psz_string = "mean"; text.psz_string = _("Mean");
419     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
420     val.psz_string = "bob"; text.psz_string = _("Bob");
421     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
422     val.psz_string = "linear"; text.psz_string = _("Linear");
423     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
424     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
425     {
426         var_Set( p_vout, "deinterlace", val );
427         if( val.psz_string ) free( val.psz_string );
428     }
429     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
430
431
432     var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
433     text.psz_string = _("Filters");
434     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
435     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
436
437     /* Calculate delay created by internal caching */
438     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
439                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
440     if( p_input_thread )
441     {
442         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
443         vlc_object_release( p_input_thread );
444     }
445     else
446     {
447         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
448     }
449
450     if( vlc_thread_create( p_vout, "video output", RunThread,
451                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
452     {
453         msg_Err( p_vout, "out of memory" );
454         module_Unneed( p_vout, p_vout->p_module );
455         vlc_object_detach( p_vout );
456         vlc_object_destroy( p_vout );
457         return NULL;
458     }
459
460     if( p_vout->b_error )
461     {
462         msg_Err( p_vout, "video output creation failed" );
463
464         /* Make sure the thread is destroyed */
465         p_vout->b_die = VLC_TRUE;
466
467         vlc_thread_join( p_vout );
468
469         vlc_object_detach( p_vout );
470         vlc_object_destroy( p_vout );
471         return NULL;
472     }
473
474     return p_vout;
475 }
476
477 /*****************************************************************************
478  * vout_Destroy: destroys a previously created video output
479  *****************************************************************************
480  * Destroy a terminated thread.
481  * The function will request a destruction of the specified thread. If pi_error
482  * is NULL, it will return once the thread is destroyed. Else, it will be
483  * update using one of the THREAD_* constants.
484  *****************************************************************************/
485 void vout_Destroy( vout_thread_t *p_vout )
486 {
487     vlc_object_t *p_playlist;
488
489     /* Request thread destruction */
490     p_vout->b_die = VLC_TRUE;
491     vlc_thread_join( p_vout );
492
493     var_Destroy( p_vout, "intf-change" );
494
495     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
496                                   FIND_ANYWHERE );
497
498     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
499
500     /* Free structure */
501     vlc_object_destroy( p_vout );
502
503     /* If it was the last vout, tell the interface to show up */
504     if( p_playlist != NULL )
505     {
506         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
507                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
508         if( p_another_vout == NULL )
509         {
510             vlc_value_t val;
511             val.b_bool = VLC_TRUE;
512             var_Set( p_playlist, "intf-show", val );
513         }
514         else
515         {
516             vlc_object_release( p_another_vout );
517         }
518         vlc_object_release( p_playlist );
519     }
520 }
521
522 /*****************************************************************************
523  * InitThread: initialize video output thread
524  *****************************************************************************
525  * This function is called from RunThread and performs the second step of the
526  * initialization. It returns 0 on success. Note that the thread's flag are not
527  * modified inside this function.
528  *****************************************************************************/
529 static int InitThread( vout_thread_t *p_vout )
530 {
531     int i, i_aspect_x, i_aspect_y;
532
533     vlc_mutex_lock( &p_vout->change_lock );
534
535 #ifdef STATS
536     p_vout->c_loops = 0;
537 #endif
538
539     /* Initialize output method, it allocates direct buffers for us */
540     if( p_vout->pf_init( p_vout ) )
541     {
542         vlc_mutex_unlock( &p_vout->change_lock );
543         return VLC_EGENERIC;
544     }
545
546     if( !I_OUTPUTPICTURES )
547     {
548         msg_Err( p_vout, "plugin was unable to allocate at least "
549                          "one direct buffer" );
550         p_vout->pf_end( p_vout );
551         vlc_mutex_unlock( &p_vout->change_lock );
552         return VLC_EGENERIC;
553     }
554
555     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
556     {
557         msg_Err( p_vout, "plugin allocated too many direct buffers, "
558                          "our internal buffers must have overflown." );
559         p_vout->pf_end( p_vout );
560         vlc_mutex_unlock( &p_vout->change_lock );
561         return VLC_EGENERIC;
562     }
563
564     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
565
566     AspectRatio( p_vout->fmt_render.i_aspect, &i_aspect_x, &i_aspect_y );
567
568     msg_Dbg( p_vout, "picture in %ix%i (%i,%i,%ix%i), "
569              "chroma %4.4s, ar %i:%i, sar %i:%i",
570              p_vout->fmt_render.i_width, p_vout->fmt_render.i_height,
571              p_vout->fmt_render.i_x_offset, p_vout->fmt_render.i_y_offset,
572              p_vout->fmt_render.i_visible_width,
573              p_vout->fmt_render.i_visible_height,
574              (char*)&p_vout->fmt_render.i_chroma,
575              i_aspect_x, i_aspect_y,
576              p_vout->fmt_render.i_sar_num, p_vout->fmt_render.i_sar_den );
577
578     AspectRatio( p_vout->fmt_in.i_aspect, &i_aspect_x, &i_aspect_y );
579
580     msg_Dbg( p_vout, "picture user %ix%i (%i,%i,%ix%i), "
581              "chroma %4.4s, ar %i:%i, sar %i:%i",
582              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
583              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
584              p_vout->fmt_in.i_visible_width,
585              p_vout->fmt_in.i_visible_height,
586              (char*)&p_vout->fmt_in.i_chroma,
587              i_aspect_x, i_aspect_y,
588              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
589
590     if( !p_vout->fmt_out.i_width || !p_vout->fmt_out.i_height )
591     {
592         p_vout->fmt_out.i_width = p_vout->fmt_out.i_visible_width =
593             p_vout->output.i_width;
594         p_vout->fmt_out.i_height = p_vout->fmt_out.i_visible_height =
595             p_vout->output.i_height;
596         p_vout->fmt_out.i_x_offset =  p_vout->fmt_out.i_y_offset = 0;
597
598         p_vout->fmt_out.i_aspect = p_vout->output.i_aspect;
599         p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
600     }
601     if( !p_vout->fmt_out.i_sar_num || !p_vout->fmt_out.i_sar_num )
602     {
603         p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_aspect *
604             p_vout->fmt_out.i_height;
605         p_vout->fmt_out.i_sar_den = VOUT_ASPECT_FACTOR *
606             p_vout->fmt_out.i_width;
607     }
608
609     vlc_reduce( &p_vout->fmt_out.i_sar_num, &p_vout->fmt_out.i_sar_den,
610                 p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den, 0 );
611
612     AspectRatio( p_vout->fmt_out.i_aspect, &i_aspect_x, &i_aspect_y );
613
614     msg_Dbg( p_vout, "picture out %ix%i, chroma %4.4s, ar %i:%i, sar %i:%i",
615              p_vout->output.i_width, p_vout->output.i_height,
616              (char*)&p_vout->output.i_chroma,
617              i_aspect_x, i_aspect_y,
618              p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den );
619
620     /* Calculate shifts from system-updated masks */
621     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
622                  p_vout->output.i_rmask );
623     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
624                  p_vout->output.i_gmask );
625     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
626                  p_vout->output.i_bmask );
627
628     /* Check whether we managed to create direct buffers similar to
629      * the render buffers, ie same size and chroma */
630     if( ( p_vout->output.i_width == p_vout->render.i_width )
631      && ( p_vout->output.i_height == p_vout->render.i_height )
632      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
633     {
634         /* Cool ! We have direct buffers, we can ask the decoder to
635          * directly decode into them ! Map the first render buffers to
636          * the first direct buffers, but keep the first direct buffer
637          * for memcpy operations */
638         p_vout->b_direct = 1;
639
640         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
641         {
642             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
643                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
644                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
645             {
646                 /* We have enough direct buffers so there's no need to
647                  * try to use system memory buffers. */
648                 break;
649             }
650             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
651             I_RENDERPICTURES++;
652         }
653
654         msg_Dbg( p_vout, "direct render, mapping "
655                  "render pictures 0-%i to system pictures 1-%i",
656                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
657     }
658     else
659     {
660         /* Rats... Something is wrong here, we could not find an output
661          * plugin able to directly render what we decode. See if we can
662          * find a chroma plugin to do the conversion */
663         p_vout->b_direct = 0;
664
665         /* Choose the best module */
666         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
667
668         if( p_vout->chroma.p_module == NULL )
669         {
670             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
671                      (char*)&p_vout->render.i_chroma,
672                      (char*)&p_vout->output.i_chroma );
673             p_vout->pf_end( p_vout );
674             vlc_mutex_unlock( &p_vout->change_lock );
675             return VLC_EGENERIC;
676         }
677
678         msg_Dbg( p_vout, "indirect render, mapping "
679                  "render pictures 0-%i to system pictures %i-%i",
680                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
681                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
682
683         /* Append render buffers after the direct buffers */
684         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
685         {
686             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
687             I_RENDERPICTURES++;
688
689             /* Check if we have enough render pictures */
690             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
691                 break;
692         }
693     }
694
695     /* Link pictures back to their heap */
696     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
697     {
698         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
699     }
700
701     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
702     {
703         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
704     }
705
706 /* XXX XXX mark thread ready */
707     return VLC_SUCCESS;
708 }
709
710 /*****************************************************************************
711  * RunThread: video output thread
712  *****************************************************************************
713  * Video output thread. This function does only returns when the thread is
714  * terminated. It handles the pictures arriving in the video heap and the
715  * display device events.
716  *****************************************************************************/
717 static void RunThread( vout_thread_t *p_vout)
718 {
719     int             i_index;                                /* index in heap */
720     int             i_idle_loops = 0;  /* loops without displaying a picture */
721     mtime_t         current_date;                            /* current date */
722     mtime_t         display_date;                            /* display date */
723
724     picture_t *     p_picture;                            /* picture pointer */
725     picture_t *     p_last_picture = NULL;                   /* last picture */
726     picture_t *     p_directbuffer;              /* direct buffer to display */
727
728     subpicture_t *  p_subpic;                          /* subpicture pointer */
729
730     /*
731      * Initialize thread
732      */
733     p_vout->b_error = InitThread( p_vout );
734
735     /* signal the creation of the vout */
736     vlc_thread_ready( p_vout );
737
738     if( p_vout->b_error )
739     {
740         /* Destroy thread structures allocated by Create and InitThread */
741         DestroyThread( p_vout );
742         return;
743     }
744
745     /*
746      * Main loop - it is not executed if an error occurred during
747      * initialization
748      */
749     while( (!p_vout->b_die) && (!p_vout->b_error) )
750     {
751         /* Initialize loop variables */
752         p_picture = NULL;
753         display_date = 0;
754         current_date = mdate();
755
756 #if 0
757         p_vout->c_loops++;
758         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
759         {
760             msg_Dbg( p_vout, "picture heap: %d/%d",
761                      I_RENDERPICTURES, p_vout->i_heap_size );
762         }
763 #endif
764
765         /*
766          * Find the picture to display (the one with the earliest date).
767          * This operation does not need lock, since only READY_PICTUREs
768          * are handled. */
769         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
770         {
771             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
772                 && ( (p_picture == NULL) ||
773                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
774             {
775                 p_picture = PP_RENDERPICTURE[i_index];
776                 display_date = p_picture->date;
777             }
778         }
779
780         if( p_picture )
781         {
782             /* If we met the last picture, parse again to see whether there is
783              * a more appropriate one. */
784             if( p_picture == p_last_picture )
785             {
786                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
787                 {
788                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
789                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
790                         && ((p_picture == p_last_picture) ||
791                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
792                     {
793                         p_picture = PP_RENDERPICTURE[i_index];
794                         display_date = p_picture->date;
795                     }
796                 }
797             }
798
799             /* If we found better than the last picture, destroy it */
800             if( p_last_picture && p_picture != p_last_picture )
801             {
802                 vlc_mutex_lock( &p_vout->picture_lock );
803                 if( p_last_picture->i_refcount )
804                 {
805                     p_last_picture->i_status = DISPLAYED_PICTURE;
806                 }
807                 else
808                 {
809                     p_last_picture->i_status = DESTROYED_PICTURE;
810                     p_vout->i_heap_size--;
811                 }
812                 vlc_mutex_unlock( &p_vout->picture_lock );
813                 p_last_picture = NULL;
814             }
815
816             /* Compute FPS rate */
817             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
818                 = display_date;
819
820             if( !p_picture->b_force &&
821                 p_picture != p_last_picture &&
822                 display_date < current_date + p_vout->render_time )
823             {
824                 /* Picture is late: it will be destroyed and the thread
825                  * will directly choose the next picture */
826                 vlc_mutex_lock( &p_vout->picture_lock );
827                 if( p_picture->i_refcount )
828                 {
829                     /* Pretend we displayed the picture, but don't destroy
830                      * it since the decoder might still need it. */
831                     p_picture->i_status = DISPLAYED_PICTURE;
832                 }
833                 else
834                 {
835                     /* Destroy the picture without displaying it */
836                     p_picture->i_status = DESTROYED_PICTURE;
837                     p_vout->i_heap_size--;
838                 }
839                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
840                                   current_date - display_date );
841                 vlc_mutex_unlock( &p_vout->picture_lock );
842
843                 continue;
844             }
845
846             if( display_date >
847                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
848             {
849                 /* Picture is waaay too early: it will be destroyed */
850                 vlc_mutex_lock( &p_vout->picture_lock );
851                 if( p_picture->i_refcount )
852                 {
853                     /* Pretend we displayed the picture, but don't destroy
854                      * it since the decoder might still need it. */
855                     p_picture->i_status = DISPLAYED_PICTURE;
856                 }
857                 else
858                 {
859                     /* Destroy the picture without displaying it */
860                     p_picture->i_status = DESTROYED_PICTURE;
861                     p_vout->i_heap_size--;
862                 }
863                 msg_Warn( p_vout, "vout warning: early picture skipped "
864                           "("I64Fd")", display_date - current_date
865                           - p_vout->i_pts_delay );
866                 vlc_mutex_unlock( &p_vout->picture_lock );
867
868                 continue;
869             }
870
871             if( display_date > current_date + VOUT_DISPLAY_DELAY )
872             {
873                 /* A picture is ready to be rendered, but its rendering date
874                  * is far from the current one so the thread will perform an
875                  * empty loop as if no picture were found. The picture state
876                  * is unchanged */
877                 p_picture    = NULL;
878                 display_date = 0;
879             }
880             else if( p_picture == p_last_picture )
881             {
882                 /* We are asked to repeat the previous picture, but we first
883                  * wait for a couple of idle loops */
884                 if( i_idle_loops < 4 )
885                 {
886                     p_picture    = NULL;
887                     display_date = 0;
888                 }
889                 else
890                 {
891                     /* We set the display date to something high, otherwise
892                      * we'll have lots of problems with late pictures */
893                     display_date = current_date + p_vout->render_time;
894                 }
895             }
896         }
897
898         if( p_picture == NULL )
899         {
900             i_idle_loops++;
901         }
902
903         if( p_picture && p_vout->b_snapshot )
904         {
905             p_vout->b_snapshot = VLC_FALSE;
906             vout_Snapshot( p_vout, p_picture );
907         }
908
909         /*
910          * Check for subpictures to display
911          */
912         p_subpic = spu_SortSubpictures( p_vout->p_spu, 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             /* Tell the vout this was the last picture and that it does not
980              * need to be forced anymore. */
981             p_last_picture = p_picture;
982             p_last_picture->b_force = 0;
983         }
984
985         if( p_picture != NULL )
986         {
987             /* Reinitialize idle loop count */
988             i_idle_loops = 0;
989         }
990
991         /*
992          * Check events and manage thread
993          */
994         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
995         {
996             /* A fatal error occurred, and the thread must terminate
997              * immediately, without displaying anything - setting b_error to 1
998              * causes the immediate end of the main while() loop. */
999             p_vout->b_error = 1;
1000         }
1001
1002         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
1003         {
1004             /* this must only happen when the vout plugin is incapable of
1005              * rescaling the picture itself. In this case we need to destroy
1006              * the current picture buffers and recreate new ones with the right
1007              * dimensions */
1008             int i;
1009
1010             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1011
1012             p_vout->pf_end( p_vout );
1013             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1014                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1015
1016             I_OUTPUTPICTURES = 0;
1017             if( p_vout->pf_init( p_vout ) )
1018             {
1019                 msg_Err( p_vout, "cannot resize display" );
1020                 /* FIXME: pf_end will be called again in EndThread() */
1021                 p_vout->b_error = 1;
1022             }
1023
1024             /* Need to reinitialise the chroma plugin */
1025             if( p_vout->chroma.p_module )
1026             {
1027                 if( p_vout->chroma.p_module->pf_deactivate )
1028                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1029                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1030             }
1031         }
1032
1033         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1034         {
1035             /* This happens when the picture buffers need to be recreated.
1036              * This is useful on multimonitor displays for instance.
1037              *
1038              * Warning: This only works when the vout creates only 1 picture
1039              * buffer!! */
1040             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1041
1042             if( !p_vout->b_direct )
1043             {
1044                 module_Unneed( p_vout, p_vout->chroma.p_module );
1045             }
1046
1047             vlc_mutex_lock( &p_vout->picture_lock );
1048
1049             p_vout->pf_end( p_vout );
1050
1051             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1052
1053             p_vout->b_error = InitThread( p_vout );
1054
1055             vlc_mutex_unlock( &p_vout->picture_lock );
1056         }
1057     }
1058
1059     /*
1060      * Error loop - wait until the thread destruction is requested
1061      */
1062     if( p_vout->b_error )
1063     {
1064         ErrorThread( p_vout );
1065     }
1066
1067     /* End of thread */
1068     EndThread( p_vout );
1069
1070     /* Destroy thread structures allocated by CreateThread */
1071     DestroyThread( p_vout );
1072 }
1073
1074 /*****************************************************************************
1075  * ErrorThread: RunThread() error loop
1076  *****************************************************************************
1077  * This function is called when an error occurred during thread main's loop.
1078  * The thread can still receive feed, but must be ready to terminate as soon
1079  * as possible.
1080  *****************************************************************************/
1081 static void ErrorThread( vout_thread_t *p_vout )
1082 {
1083     /* Wait until a `die' order */
1084     while( !p_vout->b_die )
1085     {
1086         /* Sleep a while */
1087         msleep( VOUT_IDLE_SLEEP );
1088     }
1089 }
1090
1091 /*****************************************************************************
1092  * EndThread: thread destruction
1093  *****************************************************************************
1094  * This function is called when the thread ends after a sucessful
1095  * initialization. It frees all resources allocated by InitThread.
1096  *****************************************************************************/
1097 static void EndThread( vout_thread_t *p_vout )
1098 {
1099     int     i_index;                                        /* index in heap */
1100
1101 #ifdef STATS
1102     {
1103         struct tms cpu_usage;
1104         times( &cpu_usage );
1105
1106         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1107                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1108     }
1109 #endif
1110
1111     if( !p_vout->b_direct )
1112     {
1113         module_Unneed( p_vout, p_vout->chroma.p_module );
1114     }
1115
1116     /* Destroy all remaining pictures */
1117     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1118     {
1119         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1120         {
1121             free( p_vout->p_picture[i_index].p_data_orig );
1122         }
1123     }
1124
1125     /* Destroy subpicture unit */
1126     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1127     spu_Destroy( p_vout->p_spu );
1128
1129     /* Destroy translation tables */
1130     p_vout->pf_end( p_vout );
1131
1132     /* Release the change lock */
1133     vlc_mutex_unlock( &p_vout->change_lock );
1134 }
1135
1136 /*****************************************************************************
1137  * DestroyThread: thread destruction
1138  *****************************************************************************
1139  * This function is called when the thread ends. It frees all ressources
1140  * allocated by CreateThread. Status is available at this stage.
1141  *****************************************************************************/
1142 static void DestroyThread( vout_thread_t *p_vout )
1143 {
1144     /* Destroy the locks */
1145     vlc_mutex_destroy( &p_vout->picture_lock );
1146     vlc_mutex_destroy( &p_vout->change_lock );
1147
1148     /* Release the module */
1149     if( p_vout && p_vout->p_module )
1150     {
1151         module_Unneed( p_vout, p_vout->p_module );
1152     }
1153 }
1154
1155 /* following functions are local */
1156
1157 static int ReduceHeight( int i_ratio )
1158 {
1159     int i_dummy = VOUT_ASPECT_FACTOR;
1160     int i_pgcd  = 1;
1161
1162     if( !i_ratio )
1163     {
1164         return i_pgcd;
1165     }
1166
1167     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1168     while( !(i_ratio & 1) && !(i_dummy & 1) )
1169     {
1170         i_ratio >>= 1;
1171         i_dummy >>= 1;
1172         i_pgcd  <<= 1;
1173     }
1174
1175     while( !(i_ratio % 3) && !(i_dummy % 3) )
1176     {
1177         i_ratio /= 3;
1178         i_dummy /= 3;
1179         i_pgcd  *= 3;
1180     }
1181
1182     while( !(i_ratio % 5) && !(i_dummy % 5) )
1183     {
1184         i_ratio /= 5;
1185         i_dummy /= 5;
1186         i_pgcd  *= 5;
1187     }
1188
1189     return i_pgcd;
1190 }
1191
1192 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1193 {
1194     unsigned int i_pgcd = ReduceHeight( i_aspect );
1195     *i_aspect_x = i_aspect / i_pgcd;
1196     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1197 }
1198
1199 /*****************************************************************************
1200  * BinaryLog: computes the base 2 log of a binary value
1201  *****************************************************************************
1202  * This functions is used by MaskToShift, to get a bit index from a binary
1203  * value.
1204  *****************************************************************************/
1205 static int BinaryLog( uint32_t i )
1206 {
1207     int i_log = 0;
1208
1209     if( i == 0 ) return -31337;
1210
1211     if( i & 0xffff0000 ) i_log += 16;
1212     if( i & 0xff00ff00 ) i_log += 8;
1213     if( i & 0xf0f0f0f0 ) i_log += 4;
1214     if( i & 0xcccccccc ) i_log += 2;
1215     if( i & 0xaaaaaaaa ) i_log += 1;
1216
1217     return i_log;
1218 }
1219
1220 /*****************************************************************************
1221  * MaskToShift: transform a color mask into right and left shifts
1222  *****************************************************************************
1223  * This function is used for obtaining color shifts from masks.
1224  *****************************************************************************/
1225 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1226 {
1227     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1228
1229     if( !i_mask )
1230     {
1231         *pi_left = *pi_right = 0;
1232         return;
1233     }
1234
1235     /* Get bits */
1236     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1237     i_high = i_mask + i_low;                       /* higher bit of the mask */
1238
1239     /* Transform bits into an index */
1240     i_low =  BinaryLog (i_low);
1241     i_high = BinaryLog (i_high);
1242
1243     /* Update pointers and return */
1244     *pi_left =   i_low;
1245     *pi_right = (8 - i_high + i_low);
1246 }
1247
1248 /*****************************************************************************
1249  * InitWindowSize: find the initial dimensions the video window should have.
1250  *****************************************************************************
1251  * This function will check the "width", "height" and "zoom" config options and
1252  * will calculate the size that the video window should have.
1253  *****************************************************************************/
1254 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1255                             int *pi_height )
1256 {
1257     vlc_value_t val;
1258     int i_width, i_height;
1259     uint64_t ll_zoom;
1260
1261 #define FP_FACTOR 1000                             /* our fixed point factor */
1262
1263     var_Get( p_vout, "align", &val );
1264     p_vout->i_alignment = val.i_int;
1265
1266     var_Get( p_vout, "width", &val );
1267     i_width = val.i_int;
1268     var_Get( p_vout, "height", &val );
1269     i_height = val.i_int;
1270     var_Get( p_vout, "zoom", &val );
1271     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1272
1273     if( i_width > 0 && i_height > 0)
1274     {
1275         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1276         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1277         return;
1278     }
1279     else if( i_width > 0 )
1280     {
1281         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1282         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1283                             p_vout->render.i_aspect / FP_FACTOR );
1284         return;
1285     }
1286     else if( i_height > 0 )
1287     {
1288         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1289         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1290                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1291         return;
1292     }
1293
1294     if( p_vout->render.i_height * p_vout->render.i_aspect
1295         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1296     {
1297         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1298           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1299         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1300     }
1301     else
1302     {
1303         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1304         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1305           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1306     }
1307
1308 #undef FP_FACTOR
1309 }
1310
1311 /*****************************************************************************
1312  * vout_VarCallback: generic callback for intf variables
1313  *****************************************************************************/
1314 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1315                       vlc_value_t old_value, vlc_value_t new_value,
1316                       void * unused )
1317 {
1318     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1319     vlc_value_t val;
1320     val.b_bool = VLC_TRUE;
1321     var_Set( p_vout, "intf-change", val );
1322     return VLC_SUCCESS;
1323 }
1324
1325 /*****************************************************************************
1326  * Helper thread for object variables callbacks.
1327  * Only used to avoid deadlocks when using the video embedded mode.
1328  *****************************************************************************/
1329 typedef struct suxor_thread_t
1330 {
1331     VLC_COMMON_MEMBERS
1332     input_thread_t *p_input;
1333
1334 } suxor_thread_t;
1335
1336 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1337 {
1338     vlc_value_t val;
1339
1340     vlc_thread_ready( p_this );
1341
1342     /* Now restart current video stream */
1343     var_Get( p_this->p_input, "video-es", &val );
1344     if( val.i_int >= 0 )
1345     {
1346         vlc_value_t val_es;
1347         val_es.i_int = -VIDEO_ES;
1348         var_Set( p_this->p_input, "video-es", val_es );
1349         var_Set( p_this->p_input, "video-es", val );
1350     }
1351
1352     vlc_object_release( p_this->p_input );
1353
1354 #ifdef WIN32
1355     CloseHandle( p_this->thread_id );
1356 #endif
1357
1358     vlc_object_destroy( p_this );
1359 }
1360
1361 /*****************************************************************************
1362  * object variables callbacks: a bunch of object variables are used by the
1363  * interfaces to interact with the vout.
1364  *****************************************************************************/
1365 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1366                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1367 {
1368     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1369     input_thread_t *p_input;
1370     vlc_value_t val;
1371
1372     char *psz_mode = newval.psz_string;
1373     char *psz_filter, *psz_deinterlace = NULL;
1374
1375     var_Get( p_vout, "filter", &val );
1376     psz_filter = val.psz_string;
1377     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1378
1379     if( !psz_mode || !*psz_mode )
1380     {
1381         if( psz_deinterlace )
1382         {
1383             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1384             if( psz_src[0] == ',' ) psz_src++;
1385             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1386         }
1387     }
1388     else if( !psz_deinterlace )
1389     {
1390         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1391                               sizeof(",deinterlace") );
1392         if( psz_filter && *psz_filter ) strcat( psz_filter, "," );
1393         strcat( psz_filter, "deinterlace" );
1394     }
1395
1396     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1397                                                  FIND_PARENT );
1398     if( !p_input ) return VLC_EGENERIC;
1399
1400     if( psz_mode && *psz_mode )
1401     {
1402         /* Modify input as well because the vout might have to be restarted */
1403         val.psz_string = psz_mode;
1404         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1405         var_Set( p_input, "deinterlace-mode", val );
1406     }
1407     vlc_object_release( p_input );
1408
1409     val.b_bool = VLC_TRUE;
1410     var_Set( p_vout, "intf-change", val );
1411
1412     val.psz_string = psz_filter;
1413     var_Set( p_vout, "filter", val );
1414     if( psz_filter ) free( psz_filter );
1415
1416     return VLC_SUCCESS;
1417 }
1418
1419 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1420                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1421 {
1422     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1423     input_thread_t *p_input;
1424     vlc_value_t val;
1425
1426     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1427                                                  FIND_PARENT );
1428     if (!p_input)
1429     {
1430         msg_Err( p_vout, "Input not found" );
1431         return( VLC_EGENERIC );
1432     }
1433
1434     val.b_bool = VLC_TRUE;
1435     var_Set( p_vout, "intf-change", val );
1436
1437     /* Modify input as well because the vout might have to be restarted */
1438     val.psz_string = newval.psz_string;
1439     var_Create( p_input, "filter", VLC_VAR_STRING );
1440     var_Set( p_input, "filter", val );
1441
1442     /* Now restart current video stream */
1443     var_Get( p_input, "video-es", &val );
1444     if( val.i_int >= 0 )
1445     {
1446         suxor_thread_t *p_suxor =
1447             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1448         p_suxor->p_input = p_input;
1449         p_vout->b_filter_change = VLC_TRUE;
1450         vlc_object_yield( p_input );
1451         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1452                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1453     }
1454
1455     vlc_object_release( p_input );
1456
1457     return VLC_SUCCESS;
1458 }