Make Zorglub less unhappy
[vlc.git] / modules / video_filter / mosaic.c
1 /*****************************************************************************
2  * mosaic.c : Mosaic video plugin for vlc
3  *****************************************************************************
4  * Copyright (C) 2004-2005 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Antoine Cellerier <dionoea@via.ecp.fr>
8  *          Christophe Massiot <massiot@via.ecp.fr>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
23 *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28 #include <stdlib.h>                                      /* malloc(), free() */
29 #include <string.h>
30 #include <math.h>
31
32 #include <vlc/vlc.h>
33 #include <vlc/vout.h>
34
35 #ifdef HAVE_LIMITS_H
36 #   include <limits.h> /* INT_MAX */
37 #endif
38
39 #include "vlc_filter.h"
40 #include "vlc_image.h"
41
42 #include "mosaic.h"
43
44 #define BLANK_DELAY I64C(1000000)
45
46 /*****************************************************************************
47  * Local prototypes
48  *****************************************************************************/
49 static int  CreateFilter    ( vlc_object_t * );
50 static void DestroyFilter   ( vlc_object_t * );
51
52 static subpicture_t *Filter( filter_t *, mtime_t );
53
54 static int MosaicCallback( vlc_object_t *, char const *, vlc_value_t,
55                            vlc_value_t, void * );
56
57 /*****************************************************************************
58  * filter_sys_t : filter descriptor
59  *****************************************************************************/
60 struct filter_sys_t
61 {
62     vlc_mutex_t lock;
63     vlc_mutex_t *p_lock;
64
65     image_handler_t *p_image;
66     picture_t *p_pic;
67
68     int i_position; /* mosaic positioning method */
69     vlc_bool_t b_ar; /* do we keep the aspect ratio ? */
70     vlc_bool_t b_keep; /* do we keep the original picture format ? */
71     int i_width, i_height; /* mosaic height and width */
72     int i_cols, i_rows; /* mosaic rows and cols */
73     int i_align; /* mosaic alignment in background video */
74     int i_xoffset, i_yoffset; /* top left corner offset */
75     int i_vborder, i_hborder; /* border width/height between miniatures */
76     int i_alpha; /* subfilter alpha blending */
77
78     char **ppsz_order; /* list of picture-id */
79     int i_order_length;
80
81     mtime_t i_delay;
82 };
83
84 /*****************************************************************************
85  * Module descriptor
86  *****************************************************************************/
87 #define ALPHA_TEXT N_("Alpha blending")
88 #define ALPHA_LONGTEXT N_("Alpha blending (0 -> 255). Default is 255")
89
90 #define HEIGHT_TEXT N_("Height in pixels")
91 #define WIDTH_TEXT N_("Width in pixels")
92 #define XOFFSET_TEXT N_("Top left corner x coordinate")
93 #define YOFFSET_TEXT N_("Top left corner y coordinate")
94 #define VBORDER_TEXT N_("Vertical border width in pixels")
95 #define HBORDER_TEXT N_("Horizontal border width in pixels")
96 #define ALIGN_TEXT N_("Mosaic alignment")
97
98 #define POS_TEXT N_("Positioning method")
99 #define POS_LONGTEXT N_("Positioning method. auto: automatically choose " \
100         "the best number of rows and columns. fixed: use the user-defined " \
101         "number of rows and columns.")
102 #define ROWS_TEXT N_("Number of rows")
103 #define COLS_TEXT N_("Number of columns")
104 #define AR_TEXT N_("Keep aspect ratio when resizing")
105 #define KEEP_TEXT N_("Keep original size")
106
107 #define ORDER_TEXT N_("Order as a comma separated list of picture-id(s)")
108
109 #define DELAY_TEXT N_("Delay")
110 #define DELAY_LONGTEXT N_("Pictures coming from the picture video outputs " \
111         "will be delayed accordingly (in milliseconds). For high " \
112         "values you will need to raise file-caching and others.")
113
114 static int pi_pos_values[] = { 0, 1 };
115 static char * ppsz_pos_descriptions[] =
116 { N_("auto"), N_("fixed") };
117
118 static int pi_align_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
119 static char *ppsz_align_descriptions[] =
120      { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
121      N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
122
123
124 vlc_module_begin();
125     set_description( N_("Mosaic video sub filter") );
126     set_shortname( N_("Mosaic") );
127     set_category( CAT_VIDEO );
128     set_subcategory( SUBCAT_VIDEO_SUBPIC);
129     set_capability( "sub filter", 0 );
130     set_callbacks( CreateFilter, DestroyFilter );
131
132     add_integer( "mosaic-alpha", 255, NULL, ALPHA_TEXT, ALPHA_LONGTEXT, VLC_FALSE );
133     add_integer( "mosaic-height", 100, NULL, HEIGHT_TEXT, HEIGHT_TEXT, VLC_FALSE );
134     add_integer( "mosaic-width", 100, NULL, WIDTH_TEXT, WIDTH_TEXT, VLC_FALSE );
135     add_integer( "mosaic-align", 5, NULL, ALIGN_TEXT, ALIGN_TEXT, VLC_TRUE);
136         change_integer_list( pi_align_values, ppsz_align_descriptions, 0 );
137     add_integer( "mosaic-xoffset", 0, NULL, XOFFSET_TEXT, XOFFSET_TEXT, VLC_TRUE );
138     add_integer( "mosaic-yoffset", 0, NULL, YOFFSET_TEXT, YOFFSET_TEXT, VLC_TRUE );
139     add_integer( "mosaic-vborder", 0, NULL, VBORDER_TEXT, VBORDER_TEXT, VLC_TRUE );
140     add_integer( "mosaic-hborder", 0, NULL, HBORDER_TEXT, HBORDER_TEXT, VLC_TRUE );
141
142     add_integer( "mosaic-position", 0, NULL, POS_TEXT, POS_LONGTEXT, VLC_FALSE );
143         change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
144     add_integer( "mosaic-rows", 2, NULL, ROWS_TEXT, ROWS_TEXT, VLC_FALSE );
145     add_integer( "mosaic-cols", 2, NULL, COLS_TEXT, COLS_TEXT, VLC_FALSE );
146     add_bool( "mosaic-keep-aspect-ratio", 0, NULL, AR_TEXT, AR_TEXT, VLC_FALSE );
147     add_bool( "mosaic-keep-picture", 0, NULL, KEEP_TEXT, KEEP_TEXT, VLC_FALSE );
148     add_string( "mosaic-order", "", NULL, ORDER_TEXT, ORDER_TEXT, VLC_FALSE );
149
150     add_integer( "mosaic-delay", 0, NULL, DELAY_TEXT, DELAY_LONGTEXT,
151                  VLC_FALSE );
152
153     var_Create( p_module->p_libvlc, "mosaic-lock", VLC_VAR_MUTEX );
154 vlc_module_end();
155
156
157 /*****************************************************************************
158  * CreateFiler: allocate mosaic video filter
159  *****************************************************************************/
160 static int CreateFilter( vlc_object_t *p_this )
161 {
162     filter_t *p_filter = (filter_t *)p_this;
163     filter_sys_t *p_sys;
164     libvlc_t *p_libvlc = p_filter->p_libvlc;
165     char *psz_order;
166     int i_index;
167     vlc_value_t val;
168
169     /* The mosaic thread is more important than the decoder threads */
170     vlc_thread_set_priority( p_this, VLC_THREAD_PRIORITY_OUTPUT );
171
172     /* Allocate structure */
173     p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
174     if( p_sys == NULL )
175     {
176         msg_Err( p_filter, "out of memory" );
177         return VLC_ENOMEM;
178     }
179
180     p_filter->pf_sub_filter = Filter;
181     p_sys->p_pic = NULL;
182
183     vlc_mutex_init( p_filter, &p_sys->lock );
184     vlc_mutex_lock( &p_sys->lock );
185
186     var_Get( p_libvlc, "mosaic-lock", &val );
187     p_sys->p_lock = val.p_address;
188
189 #define GET_VAR( name, min, max )                                           \
190     p_sys->i_##name = __MIN( max, __MAX( min,                               \
191                 var_CreateGetInteger( p_filter, "mosaic-" #name ) ) );      \
192     var_Destroy( p_filter, "mosaic-" #name );                               \
193     var_Create( p_libvlc, "mosaic-" #name, VLC_VAR_INTEGER );               \
194     var_SetInteger( p_libvlc, "mosaic-" #name, p_sys->i_##name );           \
195     var_AddCallback( p_libvlc, "mosaic-" #name, MosaicCallback, p_sys );
196
197     GET_VAR( width, 0, INT_MAX );
198     GET_VAR( height, 0, INT_MAX );
199     GET_VAR( xoffset, 0, INT_MAX );
200     GET_VAR( yoffset, 0, INT_MAX );
201
202     p_sys->i_align = __MIN( 10, __MAX( 0,  var_CreateGetInteger( p_filter, "mosaic-align" ) ) );
203     if( p_sys->i_align == 3 || p_sys->i_align == 7 )
204         p_sys->i_align = 5;
205     var_Destroy( p_filter, "mosaic-align" );
206     var_Create( p_libvlc, "mosaic-align", VLC_VAR_INTEGER );
207     var_SetInteger( p_libvlc, "mosaic-align", p_sys->i_align );
208     var_AddCallback( p_libvlc, "mosaic-align", MosaicCallback, p_sys );
209
210     GET_VAR( vborder, 0, INT_MAX );
211     GET_VAR( hborder, 0, INT_MAX );
212     GET_VAR( rows, 1, INT_MAX );
213     GET_VAR( cols, 1, INT_MAX );
214     GET_VAR( alpha, 0, 255 );
215     GET_VAR( position, 0, 1 );
216     GET_VAR( delay, 100, INT_MAX );
217     p_sys->i_delay *= 1000;
218
219     p_sys->b_ar = var_CreateGetBool( p_filter, "mosaic-keep-aspect-ratio" );
220     var_Destroy( p_filter, "mosaic-keep-aspect-ratio" );
221     var_Create( p_libvlc, "mosaic-keep-aspect-ratio", VLC_VAR_INTEGER );
222     var_SetBool( p_libvlc, "mosaic-keep-aspect-ratio", p_sys->b_ar );
223     var_AddCallback( p_libvlc, "mosaic-keep-aspect-ratio", MosaicCallback,
224                      p_sys );
225
226     p_sys->b_keep = var_CreateGetBool( p_filter, "mosaic-keep-picture" );
227     if ( !p_sys->b_keep )
228     {
229         p_sys->p_image = image_HandlerCreate( p_filter );
230     }
231
232     p_sys->i_order_length = 0;
233     p_sys->ppsz_order = NULL;
234     psz_order = var_CreateGetString( p_filter, "mosaic-order" );
235
236     if( psz_order[0] != 0 )
237     {
238         char *psz_end = NULL;
239         i_index = 0;
240         do
241         { 
242             psz_end = strchr( psz_order, ',' );
243             i_index++;
244             p_sys->ppsz_order = realloc( p_sys->ppsz_order,
245                                          i_index * sizeof(char *) );
246             p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
247                                            psz_end - psz_order );
248             psz_order = psz_end+1;
249         } while( NULL !=  psz_end );
250         p_sys->i_order_length = i_index;
251     }
252
253     vlc_mutex_unlock( &p_sys->lock );
254
255     return VLC_SUCCESS;
256 }
257
258 /*****************************************************************************
259  * DestroyFilter: destroy mosaic video filter
260  *****************************************************************************/
261 static void DestroyFilter( vlc_object_t *p_this )
262 {
263     filter_t *p_filter = (filter_t*)p_this;
264     filter_sys_t *p_sys = p_filter->p_sys;
265     libvlc_t *p_libvlc = p_filter->p_libvlc;
266     int i_index;
267
268     vlc_mutex_lock( &p_sys->lock );
269
270     if( !p_sys->b_keep )
271     {
272         image_HandlerDelete( p_sys->p_image );
273     }
274
275     if( p_sys->i_order_length )
276     {
277         for( i_index = 0; i_index < p_sys->i_order_length; i_index++ )
278         {
279             free( p_sys->ppsz_order[i_index] );
280         }
281         free( p_sys->ppsz_order );
282     }
283
284     var_Destroy( p_libvlc, "mosaic-alpha" );
285     var_Destroy( p_libvlc, "mosaic-height" );
286     var_Destroy( p_libvlc, "mosaic-align" );
287     var_Destroy( p_libvlc, "mosaic-width" );
288     var_Destroy( p_libvlc, "mosaic-xoffset" );
289     var_Destroy( p_libvlc, "mosaic-yoffset" );
290     var_Destroy( p_libvlc, "mosaic-vborder" );
291     var_Destroy( p_libvlc, "mosaic-hborder" );
292     var_Destroy( p_libvlc, "mosaic-position" );
293     var_Destroy( p_libvlc, "mosaic-rows" );
294     var_Destroy( p_libvlc, "mosaic-cols" );
295     var_Destroy( p_libvlc, "mosaic-keep-aspect-ratio" );
296
297     if( p_sys->p_pic ) p_sys->p_pic->pf_release( p_sys->p_pic );
298     vlc_mutex_unlock( &p_sys->lock );
299     vlc_mutex_destroy( &p_sys->lock );
300     free( p_sys );
301 }
302
303 /*****************************************************************************
304  * MosaicReleasePicture : Hack to avoid picture duplication
305  *****************************************************************************/
306 static void MosaicReleasePicture( picture_t *p_picture )
307 {
308     picture_t *p_original_pic = (picture_t *)p_picture->p_sys;
309
310     p_original_pic->pf_release( p_original_pic );
311 }
312
313 /*****************************************************************************
314  * Filter
315  *****************************************************************************/
316 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
317 {
318     filter_sys_t *p_sys = p_filter->p_sys;
319     bridge_t *p_bridge;
320
321     subpicture_t *p_spu;
322
323     int i_index, i_real_index, i_row, i_col;
324     int i_greatest_real_index_used = p_sys->i_order_length - 1;
325
326     subpicture_region_t *p_region;
327     subpicture_region_t *p_region_prev = NULL;
328
329     /* Allocate the subpicture internal data. */
330     p_spu = p_filter->pf_sub_buffer_new( p_filter );
331     if( !p_spu )
332     {
333         return NULL;
334     }
335
336     /* Initialize subpicture */
337     p_spu->i_channel = 0;
338     p_spu->i_start  = date;
339     p_spu->i_stop = 0;
340     p_spu->b_ephemer = VLC_TRUE;
341     p_spu->i_alpha = p_sys->i_alpha;
342     p_spu->i_flags = p_sys->i_align;
343     p_spu->b_absolute = VLC_FALSE;
344
345     vlc_mutex_lock( &p_sys->lock );
346     vlc_mutex_lock( p_sys->p_lock );
347
348     p_bridge = GetBridge( p_filter );
349     if ( p_bridge == NULL )
350     {
351         vlc_mutex_unlock( p_sys->p_lock );
352         vlc_mutex_unlock( &p_sys->lock );
353         return p_spu;
354     }
355
356     if ( p_sys->i_position == 0 ) /* use automatic positioning */
357     {
358         int i_numpics = p_sys->i_order_length; /* keep slots and all */
359         for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
360         {
361             bridged_es_t *p_es = p_bridge->pp_es[i_index];
362             if ( !p_es->b_empty )
363             {
364                 i_numpics ++;
365                 if( p_sys->i_order_length && p_es->psz_id != 0 )
366                 {
367                     /* We also want to leave slots for images given in
368                      * mosaic-order that are not available in p_vout_picture */
369                     int i;
370                     for( i = 0; i < p_sys->i_order_length ; i++ )
371                     {
372                         if( !strcmp( p_sys->ppsz_order[i], p_es->psz_id ) )
373                         {
374                             i_numpics--;
375                             break;
376                         }
377                     }
378
379                 }
380             }
381         }
382         p_sys->i_rows = ((int)ceil(sqrt( (float)i_numpics )));
383         p_sys->i_cols = ( i_numpics % p_sys->i_rows == 0 ?
384                             i_numpics / p_sys->i_rows :
385                             i_numpics / p_sys->i_rows + 1 );
386     }
387
388     i_real_index = 0;
389
390     for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
391     {
392         bridged_es_t *p_es = p_bridge->pp_es[i_index];
393         video_format_t fmt_in = {0}, fmt_out = {0};
394         picture_t *p_converted;
395
396         if ( p_es->b_empty )
397             continue;
398
399         while ( p_es->p_picture != NULL
400                  && p_es->p_picture->date + p_sys->i_delay < date )
401         {
402             if ( p_es->p_picture->p_next != NULL )
403             {
404                 picture_t *p_next = p_es->p_picture->p_next;
405                 p_es->p_picture->pf_release( p_es->p_picture );
406                 p_es->p_picture = p_next;
407             }
408             else if ( p_es->p_picture->date + p_sys->i_delay + BLANK_DELAY <
409                         date )
410             {
411                 /* Display blank */
412                 p_es->p_picture->pf_release( p_es->p_picture );
413                 p_es->p_picture = NULL;
414                 p_es->pp_last = &p_es->p_picture;
415                 break;
416             }
417             else
418             {
419                 msg_Dbg( p_filter, "too late picture for %s (" I64Fd ")",
420                          p_es->psz_id,
421                          date - p_es->p_picture->date - p_sys->i_delay );
422                 break;
423             }
424         }
425
426         if ( p_es->p_picture == NULL )
427             continue;
428
429         if ( p_sys->i_order_length == 0 )
430         {
431             i_real_index++;
432         }
433         else
434         {
435             int i;
436             for ( i = 0; i <= p_sys->i_order_length; i++ )
437             {
438                 if ( i == p_sys->i_order_length ) break;
439                 if ( strcmp( p_es->psz_id, p_sys->ppsz_order[i] ) == 0 )
440                 {
441                     i_real_index = i;
442                     break;
443                 }
444             }
445             if ( i == p_sys->i_order_length )
446                 i_real_index = ++i_greatest_real_index_used;
447         }
448         i_row = ( i_real_index / p_sys->i_cols ) % p_sys->i_rows;
449         i_col = i_real_index % p_sys->i_cols ;
450
451         if ( !p_sys->b_keep )
452         {
453             /* Convert the images */
454             fmt_in.i_chroma = p_es->p_picture->format.i_chroma;
455             fmt_in.i_height = p_es->p_picture->format.i_height;
456             fmt_in.i_width = p_es->p_picture->format.i_width;
457
458             fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
459             fmt_out.i_width = fmt_in.i_width *
460                 ( ( p_sys->i_width - ( p_sys->i_cols - 1 ) * p_sys->i_vborder )
461                   / p_sys->i_cols ) / fmt_in.i_width;
462             fmt_out.i_height = fmt_in.i_height *
463                 ( ( p_sys->i_height - ( p_sys->i_rows - 1 ) * p_sys->i_hborder )
464                   / p_sys->i_rows ) / fmt_in.i_height;
465             if( p_sys->b_ar ) /* keep aspect ratio */
466             {
467                 if( (float)fmt_out.i_width / (float)fmt_out.i_height
468                       > (float)fmt_in.i_width / (float)fmt_in.i_height )
469                 {
470                     fmt_out.i_width = ( fmt_out.i_height * fmt_in.i_width )
471                                          / fmt_in.i_height;
472                 }
473                 else
474                 {
475                     fmt_out.i_height = ( fmt_out.i_width * fmt_in.i_height )
476                                         / fmt_in.i_width;
477                 }
478              }
479
480             fmt_out.i_visible_width = fmt_out.i_width;
481             fmt_out.i_visible_height = fmt_out.i_height;
482
483             p_converted = image_Convert( p_sys->p_image, p_es->p_picture,
484                                          &fmt_in, &fmt_out );
485             if( !p_converted )
486             {
487                 msg_Warn( p_filter,
488                            "image resizing and chroma conversion failed" );
489                 continue;
490             }
491         }
492         else
493         {
494             p_converted = p_es->p_picture;
495             p_converted->i_refcount++;
496             fmt_in.i_width = fmt_out.i_width = p_converted->format.i_width;
497             fmt_in.i_height = fmt_out.i_height = p_converted->format.i_height;
498             fmt_in.i_chroma = fmt_out.i_chroma = p_converted->format.i_chroma;
499             fmt_out.i_visible_width = fmt_out.i_width;
500             fmt_out.i_visible_height = fmt_out.i_height;
501         }
502
503         p_region = p_spu->pf_make_region( VLC_OBJECT(p_filter), &fmt_out,
504                                           p_converted );
505         if( !p_region )
506         {
507             msg_Err( p_filter, "cannot allocate SPU region" );
508             p_filter->pf_sub_buffer_del( p_filter, p_spu );
509             vlc_mutex_unlock( &p_sys->lock );
510             vlc_mutex_unlock( p_sys->p_lock );
511             return p_spu;
512         }
513
514         /* HACK ALERT : let's fix the pointers to avoid picture duplication.
515          * This is necessary because p_region->picture is not a pointer
516          * as it ought to be. */
517         if( !p_sys->b_keep )
518         {
519             free( p_converted );
520         }
521         else
522         {
523             /* Keep a pointer to the original picture (and its refcount...). */
524             p_region->picture.p_sys = (picture_sys_t *)p_converted;
525             p_region->picture.pf_release = MosaicReleasePicture;
526         }
527
528         if( p_sys->b_ar || p_sys->b_keep ) /* keep aspect ratio */
529         {
530             /* center the video in the dedicated rectangle */
531             p_region->i_x = p_sys->i_xoffset
532                         + i_col * ( p_sys->i_width / p_sys->i_cols )
533                         + ( i_col * p_sys->i_vborder ) / p_sys->i_cols
534                         + ( ( ( p_sys->i_width
535                                  - ( p_sys->i_cols - 1 ) * p_sys->i_vborder )
536                             / p_sys->i_cols ) - fmt_out.i_width ) / 2;
537             p_region->i_y = p_sys->i_yoffset
538                         + i_row * ( p_sys->i_height / p_sys->i_rows )
539                         + ( i_row * p_sys->i_hborder ) / p_sys->i_rows
540                         + ( ( ( p_sys->i_height
541                                  - ( p_sys->i_rows - 1 ) * p_sys->i_hborder )
542                             / p_sys->i_rows ) - fmt_out.i_height ) / 2;
543         }
544         else
545         {
546             /* we don't have to center the video since it takes the
547             whole rectangle area */
548             p_region->i_x = p_sys->i_xoffset
549                             + i_col * ( p_sys->i_width / p_sys->i_cols )
550                             + ( i_col * p_sys->i_vborder ) / p_sys->i_cols;
551             p_region->i_y = p_sys->i_yoffset
552                         + i_row * ( p_sys->i_height / p_sys->i_rows )
553                         + ( i_row * p_sys->i_hborder ) / p_sys->i_rows;
554         }
555
556         if( p_region_prev == NULL )
557         {
558             p_spu->p_region = p_region;
559         }
560         else
561         {
562             p_region_prev->p_next = p_region;
563         }
564
565         p_region_prev = p_region;
566     }
567
568     vlc_mutex_unlock( p_sys->p_lock );
569     vlc_mutex_unlock( &p_sys->lock );
570
571     return p_spu;
572 }
573
574 /*****************************************************************************
575 * Callback to update params on the fly
576 *****************************************************************************/
577 static int MosaicCallback( vlc_object_t *p_this, char const *psz_var,
578                             vlc_value_t oldval, vlc_value_t newval,
579                             void *p_data )
580 {
581     filter_sys_t *p_sys = (filter_sys_t *) p_data;
582     if( !strcmp( psz_var, "mosaic-alpha" ) )
583     {
584         vlc_mutex_lock( &p_sys->lock );
585         msg_Dbg( p_this, "Changing alpha from %d/255 to %d/255",
586                          p_sys->i_alpha, newval.i_int);
587         p_sys->i_alpha = __MIN( __MAX( newval.i_int, 0 ), 255 );
588         vlc_mutex_unlock( &p_sys->lock );
589     }
590     else if( !strcmp( psz_var, "mosaic-height" ) )
591     {
592         vlc_mutex_lock( &p_sys->lock );
593         msg_Dbg( p_this, "Changing height from %dpx to %dpx",
594                           p_sys->i_height, newval.i_int );
595         p_sys->i_height = __MAX( newval.i_int, 0 );
596         vlc_mutex_unlock( &p_sys->lock );
597     }
598     else if( !strcmp( psz_var, "mosaic-width" ) )
599     {
600         vlc_mutex_lock( &p_sys->lock );
601         msg_Dbg( p_this, "Changing width from %dpx to %dpx",
602                          p_sys->i_width, newval.i_int );
603         p_sys->i_width = __MAX( newval.i_int, 0 );
604         vlc_mutex_unlock( &p_sys->lock );
605     }
606     else if( !strcmp( psz_var, "mosaic-xoffset" ) )
607     {
608         vlc_mutex_lock( &p_sys->lock );
609         msg_Dbg( p_this, "Changing x offset from %dpx to %dpx",
610                          p_sys->i_xoffset, newval.i_int );
611         p_sys->i_xoffset = __MAX( newval.i_int, 0 );
612         vlc_mutex_unlock( &p_sys->lock );
613     }
614     else if( !strcmp( psz_var, "mosaic-yoffset" ) )
615     {
616         vlc_mutex_lock( &p_sys->lock );
617         msg_Dbg( p_this, "Changing y offset from %dpx to %dpx",
618                          p_sys->i_yoffset, newval.i_int );
619         p_sys->i_yoffset = __MAX( newval.i_int, 0 );
620         vlc_mutex_unlock( &p_sys->lock );
621     }
622     else if( !strcmp( psz_var, "mosaic-align" ) )
623     {
624         int i_old = 0, i_new = 0;
625         vlc_mutex_lock( &p_sys->lock );
626         newval.i_int = __MIN( __MAX( newval.i_int, 0 ), 10 );
627         if( newval.i_int == 3 || newval.i_int == 7 )
628             newval.i_int = 5;
629         while( pi_align_values[i_old] != p_sys->i_align ) i_old++;
630         while( pi_align_values[i_new] != newval.i_int ) i_new++;
631         msg_Dbg( p_this, "Changing alignment from %d (%s) to %d (%s)",
632                      p_sys->i_align, ppsz_align_descriptions[i_old],
633                      newval.i_int, ppsz_align_descriptions[i_new] );
634         p_sys->i_align = newval.i_int;
635         vlc_mutex_unlock( &p_sys->lock );
636     }
637     else if( !strcmp( psz_var, "mosaic-vborder" ) )
638     {
639         vlc_mutex_lock( &p_sys->lock );
640         msg_Dbg( p_this, "Changing vertical border from %dpx to %dpx",
641                          p_sys->i_vborder, newval.i_int );
642         p_sys->i_vborder = __MAX( newval.i_int, 0 );
643         vlc_mutex_unlock( &p_sys->lock );
644     }
645     else if( !strcmp( psz_var, "mosaic-hborder" ) )
646     {
647         vlc_mutex_lock( &p_sys->lock );
648         msg_Dbg( p_this, "Changing horizontal border from %dpx to %dpx",
649                          p_sys->i_vborder, newval.i_int );
650         p_sys->i_hborder = __MAX( newval.i_int, 0 );
651         vlc_mutex_unlock( &p_sys->lock );
652     }
653     else if( !strcmp( psz_var, "mosaic-position" ) )
654     {
655         if( newval.i_int > 1 || newval.i_int < 0 )
656         {
657             msg_Err( p_this, "Position is either 0 (auto) or 1 (fixed)" );
658         }
659         else
660         {
661             vlc_mutex_lock( &p_sys->lock );
662             msg_Dbg( p_this, "Changing position method from %d (%s) to %d (%s)",
663                              p_sys->i_position, ppsz_pos_descriptions[p_sys->i_position],
664                              newval.i_int, ppsz_pos_descriptions[newval.i_int]);
665             p_sys->i_position = newval.i_int;
666             vlc_mutex_unlock( &p_sys->lock );
667         }
668     }
669     else if( !strcmp( psz_var, "mosaic-rows" ) )
670     {
671         vlc_mutex_lock( &p_sys->lock );
672         msg_Dbg( p_this, "Changing number of rows from %d to %d",
673                          p_sys->i_rows, newval.i_int );
674         p_sys->i_rows = __MAX( newval.i_int, 1 );
675         vlc_mutex_unlock( &p_sys->lock );
676     }
677     else if( !strcmp( psz_var, "mosaic-cols" ) )
678     {
679         vlc_mutex_lock( &p_sys->lock );
680         msg_Dbg( p_this, "Changing number of columns from %d to %d",
681                          p_sys->i_cols, newval.i_int );
682         p_sys->i_cols = __MAX( newval.i_int, 1 );
683         vlc_mutex_unlock( &p_sys->lock );
684     }
685     else if( !strcmp( psz_var, "mosaic-keep-aspect-ratio" ) )
686     {
687         vlc_mutex_lock( &p_sys->lock );
688         if( newval.i_int )
689         {
690             msg_Dbg( p_this, "Keep aspect ratio" );
691             p_sys->b_ar = 1;
692         }
693         else
694         {
695             msg_Dbg( p_this, "Don't keep aspect ratio" );
696             p_sys->b_ar = 0;
697         }
698         vlc_mutex_unlock( &p_sys->lock );
699     }
700     return VLC_SUCCESS;
701 }