* modules/video_filter/mosaic.c: %lld -> I64Fd
[vlc.git] / modules / video_filter / mosaic.c
1 /*****************************************************************************
2  * mosaic.c : Mosaic video plugin for vlc
3  *****************************************************************************
4  * Copyright (C) 2004-2005 VideoLAN
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_capability( "sub filter", 0 );
128     set_callbacks( CreateFilter, DestroyFilter );
129
130     add_integer( "mosaic-alpha", 255, NULL, ALPHA_TEXT, ALPHA_LONGTEXT, VLC_FALSE );
131     add_integer( "mosaic-height", 100, NULL, HEIGHT_TEXT, HEIGHT_TEXT, VLC_FALSE );
132     add_integer( "mosaic-width", 100, NULL, WIDTH_TEXT, WIDTH_TEXT, VLC_FALSE );
133     add_integer( "mosaic-align", 5, NULL, ALIGN_TEXT, ALIGN_TEXT, VLC_TRUE);
134         change_integer_list( pi_align_values, ppsz_align_descriptions, 0 );
135     add_integer( "mosaic-xoffset", 0, NULL, XOFFSET_TEXT, XOFFSET_TEXT, VLC_TRUE );
136     add_integer( "mosaic-yoffset", 0, NULL, YOFFSET_TEXT, YOFFSET_TEXT, VLC_TRUE );
137     add_integer( "mosaic-vborder", 0, NULL, VBORDER_TEXT, VBORDER_TEXT, VLC_TRUE );
138     add_integer( "mosaic-hborder", 0, NULL, HBORDER_TEXT, HBORDER_TEXT, VLC_TRUE );
139
140     add_integer( "mosaic-position", 0, NULL, POS_TEXT, POS_LONGTEXT, VLC_FALSE );
141         change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
142     add_integer( "mosaic-rows", 2, NULL, ROWS_TEXT, ROWS_TEXT, VLC_FALSE );
143     add_integer( "mosaic-cols", 2, NULL, COLS_TEXT, COLS_TEXT, VLC_FALSE );
144     add_bool( "mosaic-keep-aspect-ratio", 0, NULL, AR_TEXT, AR_TEXT, VLC_FALSE );
145     add_bool( "mosaic-keep-picture", 0, NULL, KEEP_TEXT, KEEP_TEXT, VLC_FALSE );
146     add_string( "mosaic-order", "", NULL, ORDER_TEXT, ORDER_TEXT, VLC_FALSE );
147
148     add_integer( "mosaic-delay", 0, NULL, DELAY_TEXT, DELAY_LONGTEXT,
149                  VLC_FALSE );
150
151     var_Create( p_module->p_libvlc, "mosaic-lock", VLC_VAR_MUTEX );
152 vlc_module_end();
153
154
155 /*****************************************************************************
156  * CreateFiler: allocate mosaic video filter
157  *****************************************************************************/
158 static int CreateFilter( vlc_object_t *p_this )
159 {
160     filter_t *p_filter = (filter_t *)p_this;
161     filter_sys_t *p_sys;
162     libvlc_t *p_libvlc = p_filter->p_libvlc;
163     char *psz_order;
164     int i_index;
165     vlc_value_t val;
166
167     /* The mosaic thread is more important than the decoder threads */
168     vlc_thread_set_priority( p_this, VLC_THREAD_PRIORITY_OUTPUT );
169
170     /* Allocate structure */
171     p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
172     if( p_sys == NULL )
173     {
174         msg_Err( p_filter, "out of memory" );
175         return VLC_ENOMEM;
176     }
177
178     p_filter->pf_sub_filter = Filter;
179     p_sys->p_pic = NULL;
180
181     vlc_mutex_init( p_filter, &p_sys->lock );
182     vlc_mutex_lock( &p_sys->lock );
183
184     var_Get( p_libvlc, "mosaic-lock", &val );
185     p_sys->p_lock = val.p_address;
186
187 #define GET_VAR( name, min, max )                                           \
188     p_sys->i_##name = __MIN( max, __MAX( min,                               \
189                 var_CreateGetInteger( p_filter, "mosaic-" #name ) ) );      \
190     var_Destroy( p_filter, "mosaic-" #name );                               \
191     var_Create( p_libvlc, "mosaic-" #name, VLC_VAR_INTEGER );               \
192     var_SetInteger( p_libvlc, "mosaic-" #name, p_sys->i_##name );           \
193     var_AddCallback( p_libvlc, "mosaic-" #name, MosaicCallback, p_sys );
194
195     GET_VAR( width, 0, INT_MAX );
196     GET_VAR( height, 0, INT_MAX );
197     GET_VAR( xoffset, 0, INT_MAX );
198     GET_VAR( yoffset, 0, INT_MAX );
199
200     p_sys->i_align = __MIN( 10, __MAX( 0,  var_CreateGetInteger( p_filter, "mosaic-align" ) ) );
201     if( p_sys->i_align == 3 || p_sys->i_align == 7 )
202         p_sys->i_align = 5;
203     var_Destroy( p_filter, "mosaic-align" );
204     var_Create( p_libvlc, "mosaic-align", VLC_VAR_INTEGER );
205     var_SetInteger( p_libvlc, "mosaic-align", p_sys->i_align );
206     var_AddCallback( p_libvlc, "mosaic-align", MosaicCallback, p_sys );
207
208     GET_VAR( vborder, 0, INT_MAX );
209     GET_VAR( hborder, 0, INT_MAX );
210     GET_VAR( rows, 1, INT_MAX );
211     GET_VAR( cols, 1, INT_MAX );
212     GET_VAR( alpha, 0, 255 );
213     GET_VAR( position, 0, 1 );
214     GET_VAR( delay, 100, INT_MAX );
215     p_sys->i_delay *= 1000;
216
217     p_sys->b_ar = var_CreateGetBool( p_filter, "mosaic-keep-aspect-ratio" );
218     var_Destroy( p_filter, "mosaic-keep-aspect-ratio" );
219     var_Create( p_libvlc, "mosaic-keep-aspect-ratio", VLC_VAR_INTEGER );
220     var_SetBool( p_libvlc, "mosaic-keep-aspect-ratio", p_sys->b_ar );
221     var_AddCallback( p_libvlc, "mosaic-keep-aspect-ratio", MosaicCallback,
222                      p_sys );
223
224     p_sys->b_keep = var_CreateGetBool( p_filter, "mosaic-keep-picture" );
225     if ( !p_sys->b_keep )
226     {
227         p_sys->p_image = image_HandlerCreate( p_filter );
228     }
229
230     p_sys->i_order_length = 0;
231     p_sys->ppsz_order = NULL;
232     psz_order = var_CreateGetString( p_filter, "mosaic-order" );
233
234     if( psz_order[0] != 0 )
235     {
236         char *psz_end = NULL;
237         i_index = 0;
238         do
239         { 
240             psz_end = strchr( psz_order, ',' );
241             i_index++;
242             p_sys->ppsz_order = realloc( p_sys->ppsz_order,
243                                          i_index * sizeof(char *) );
244             p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
245                                            psz_end - psz_order );
246             psz_order = psz_end+1;
247         } while( NULL !=  psz_end );
248         p_sys->i_order_length = i_index;
249     }
250
251     vlc_mutex_unlock( &p_sys->lock );
252
253     return VLC_SUCCESS;
254 }
255
256 /*****************************************************************************
257  * DestroyFilter: destroy mosaic video filter
258  *****************************************************************************/
259 static void DestroyFilter( vlc_object_t *p_this )
260 {
261     filter_t *p_filter = (filter_t*)p_this;
262     filter_sys_t *p_sys = p_filter->p_sys;
263     libvlc_t *p_libvlc = p_filter->p_libvlc;
264     int i_index;
265
266     vlc_mutex_lock( &p_sys->lock );
267
268     if( !p_sys->b_keep )
269     {
270         image_HandlerDelete( p_sys->p_image );
271     }
272
273     if( p_sys->i_order_length )
274     {
275         for( i_index = 0; i_index < p_sys->i_order_length; i_index++ )
276         {
277             free( p_sys->ppsz_order[i_index] );
278         }
279         free( p_sys->ppsz_order );
280     }
281
282     var_Destroy( p_libvlc, "mosaic-alpha" );
283     var_Destroy( p_libvlc, "mosaic-height" );
284     var_Destroy( p_libvlc, "mosaic-align" );
285     var_Destroy( p_libvlc, "mosaic-width" );
286     var_Destroy( p_libvlc, "mosaic-xoffset" );
287     var_Destroy( p_libvlc, "mosaic-yoffset" );
288     var_Destroy( p_libvlc, "mosaic-vborder" );
289     var_Destroy( p_libvlc, "mosaic-hborder" );
290     var_Destroy( p_libvlc, "mosaic-position" );
291     var_Destroy( p_libvlc, "mosaic-rows" );
292     var_Destroy( p_libvlc, "mosaic-cols" );
293     var_Destroy( p_libvlc, "mosaic-keep-aspect-ratio" );
294
295     if( p_sys->p_pic ) p_sys->p_pic->pf_release( p_sys->p_pic );
296     vlc_mutex_unlock( &p_sys->lock );
297     vlc_mutex_destroy( &p_sys->lock );
298     free( p_sys );
299 }
300
301 /*****************************************************************************
302  * MosaicReleasePicture : Hack to avoid picture duplication
303  *****************************************************************************/
304 static void MosaicReleasePicture( picture_t *p_picture )
305 {
306     picture_t *p_original_pic = (picture_t *)p_picture->p_sys;
307
308     p_original_pic->pf_release( p_original_pic );
309 }
310
311 /*****************************************************************************
312  * Filter
313  *****************************************************************************/
314 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
315 {
316     filter_sys_t *p_sys = p_filter->p_sys;
317     bridge_t *p_bridge;
318
319     subpicture_t *p_spu;
320
321     int i_index, i_real_index, i_row, i_col;
322     int i_greatest_real_index_used = p_sys->i_order_length - 1;
323
324     subpicture_region_t *p_region;
325     subpicture_region_t *p_region_prev = NULL;
326
327     /* Allocate the subpicture internal data. */
328     p_spu = p_filter->pf_sub_buffer_new( p_filter );
329     if( !p_spu )
330     {
331         return NULL;
332     }
333
334     /* Initialize subpicture */
335     p_spu->i_channel = 0;
336     p_spu->i_start  = date;
337     p_spu->i_stop = 0;
338     p_spu->b_ephemer = VLC_TRUE;
339     p_spu->i_alpha = p_sys->i_alpha;
340     p_spu->i_flags = p_sys->i_align;
341     p_spu->b_absolute = VLC_FALSE;
342
343     vlc_mutex_lock( &p_sys->lock );
344     vlc_mutex_lock( p_sys->p_lock );
345
346     p_bridge = GetBridge( p_filter );
347     if ( p_bridge == NULL )
348     {
349         vlc_mutex_unlock( p_sys->p_lock );
350         vlc_mutex_unlock( &p_sys->lock );
351         return p_spu;
352     }
353
354     if ( p_sys->i_position == 0 ) /* use automatic positioning */
355     {
356         int i_numpics = p_sys->i_order_length; /* keep slots and all */
357         for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
358         {
359             bridged_es_t *p_es = p_bridge->pp_es[i_index];
360             if ( !p_es->b_empty )
361             {
362                 i_numpics ++;
363                 if( p_sys->i_order_length && p_es->psz_id != 0 )
364                 {
365                     /* We also want to leave slots for images given in
366                      * mosaic-order that are not available in p_vout_picture */
367                     int i;
368                     for( i = 0; i < p_sys->i_order_length ; i++ )
369                     {
370                         if( !strcmp( p_sys->ppsz_order[i], p_es->psz_id ) )
371                         {
372                             i_numpics--;
373                             break;
374                         }
375                     }
376
377                 }
378             }
379         }
380         p_sys->i_rows = ((int)ceil(sqrt( (float)i_numpics )));
381         p_sys->i_cols = ( i_numpics % p_sys->i_rows == 0 ?
382                             i_numpics / p_sys->i_rows :
383                             i_numpics / p_sys->i_rows + 1 );
384     }
385
386     i_real_index = 0;
387
388     for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
389     {
390         bridged_es_t *p_es = p_bridge->pp_es[i_index];
391         video_format_t fmt_in = {0}, fmt_out = {0};
392         picture_t *p_converted;
393
394         if ( p_es->b_empty || p_es->p_picture == NULL )
395             continue;
396
397         if ( p_es->p_picture->date + p_sys->i_delay < date )
398         {
399             if ( p_es->p_picture->p_next != NULL )
400             {
401                 picture_t *p_next = p_es->p_picture->p_next;
402                 p_es->p_picture->pf_release( p_es->p_picture );
403                 p_es->p_picture = p_next;
404             }
405             else if ( p_es->p_picture->date + p_sys->i_delay + BLANK_DELAY <
406                         date )
407             {
408                 /* Display blank */
409                 p_es->p_picture->pf_release( p_es->p_picture );
410                 p_es->p_picture = NULL;
411                 p_es->pp_last = &p_es->p_picture;
412                 continue;
413             }
414             else
415                 msg_Dbg( p_filter, "too late picture for %s (" I64Fd ")",
416                          date - p_es->p_picture->date - p_sys->i_delay,
417                          p_es->psz_id );
418         }
419
420         if ( p_sys->i_order_length == 0 )
421         {
422             i_real_index++;
423         }
424         else
425         {
426             int i;
427             for ( i = 0; i <= p_sys->i_order_length; i++ )
428             {
429                 if ( i == p_sys->i_order_length ) break;
430                 if ( strcmp( p_es->psz_id, p_sys->ppsz_order[i] ) == 0 )
431                 {
432                     i_real_index = i;
433                     break;
434                 }
435             }
436             if ( i == p_sys->i_order_length )
437                 i_real_index = ++i_greatest_real_index_used;
438         }
439         i_row = ( i_real_index / p_sys->i_cols ) % p_sys->i_rows;
440         i_col = i_real_index % p_sys->i_cols ;
441
442         if ( !p_sys->b_keep )
443         {
444             /* Convert the images */
445             fmt_in.i_chroma = p_es->p_picture->format.i_chroma;
446             fmt_in.i_height = p_es->p_picture->format.i_height;
447             fmt_in.i_width = p_es->p_picture->format.i_width;
448
449             fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
450             fmt_out.i_width = fmt_in.i_width *
451                 ( ( p_sys->i_width - ( p_sys->i_cols - 1 ) * p_sys->i_vborder )
452                   / p_sys->i_cols ) / fmt_in.i_width;
453             fmt_out.i_height = fmt_in.i_height *
454                 ( ( p_sys->i_height - ( p_sys->i_rows - 1 ) * p_sys->i_hborder )
455                   / p_sys->i_rows ) / fmt_in.i_height;
456             if( p_sys->b_ar ) /* keep aspect ratio */
457             {
458                 if( (float)fmt_out.i_width / (float)fmt_out.i_height
459                       > (float)fmt_in.i_width / (float)fmt_in.i_height )
460                 {
461                     fmt_out.i_width = ( fmt_out.i_height * fmt_in.i_width )
462                                          / fmt_in.i_height;
463                 }
464                 else
465                 {
466                     fmt_out.i_height = ( fmt_out.i_width * fmt_in.i_height )
467                                         / fmt_in.i_width;
468                 }
469              }
470
471             fmt_out.i_visible_width = fmt_out.i_width;
472             fmt_out.i_visible_height = fmt_out.i_height;
473
474             p_converted = image_Convert( p_sys->p_image, p_es->p_picture,
475                                          &fmt_in, &fmt_out );
476             if( !p_converted )
477             {
478                 msg_Warn( p_filter,
479                            "image resizing and chroma conversion failed" );
480                 continue;
481             }
482         }
483         else
484         {
485             p_converted = p_es->p_picture;
486             p_converted->i_refcount++;
487             fmt_in.i_width = fmt_out.i_width = p_converted->format.i_width;
488             fmt_in.i_height = fmt_out.i_height = p_converted->format.i_height;
489             fmt_in.i_chroma = fmt_out.i_chroma = p_converted->format.i_chroma;
490             fmt_out.i_visible_width = fmt_out.i_width;
491             fmt_out.i_visible_height = fmt_out.i_height;
492         }
493
494         p_region = p_spu->pf_make_region( VLC_OBJECT(p_filter), &fmt_out,
495                                           p_converted );
496         if( !p_region )
497         {
498             msg_Err( p_filter, "cannot allocate SPU region" );
499             p_filter->pf_sub_buffer_del( p_filter, p_spu );
500             vlc_mutex_unlock( &p_sys->lock );
501             vlc_mutex_unlock( p_sys->p_lock );
502             return p_spu;
503         }
504
505         /* HACK ALERT : let's fix the pointers to avoid picture duplication.
506          * This is necessary because p_region->picture is not a pointer
507          * as it ought to be. */
508         if( !p_sys->b_keep )
509         {
510             free( p_converted );
511         }
512         else
513         {
514             /* Keep a pointer to the original picture (and its refcount...). */
515             p_region->picture.p_sys = (picture_sys_t *)p_converted;
516             p_region->picture.pf_release = MosaicReleasePicture;
517         }
518
519         if( p_sys->b_ar || p_sys->b_keep ) /* keep aspect ratio */
520         {
521             /* center the video in the dedicated rectangle */
522             p_region->i_x = p_sys->i_xoffset
523                         + i_col * ( p_sys->i_width / p_sys->i_cols )
524                         + ( i_col * p_sys->i_vborder ) / p_sys->i_cols
525                         + ( ( ( p_sys->i_width
526                                  - ( p_sys->i_cols - 1 ) * p_sys->i_vborder )
527                             / p_sys->i_cols ) - fmt_out.i_width ) / 2;
528             p_region->i_y = p_sys->i_yoffset
529                         + i_row * ( p_sys->i_height / p_sys->i_rows )
530                         + ( i_row * p_sys->i_hborder ) / p_sys->i_rows
531                         + ( ( ( p_sys->i_height
532                                  - ( p_sys->i_rows - 1 ) * p_sys->i_hborder )
533                             / p_sys->i_rows ) - fmt_out.i_height ) / 2;
534         }
535         else
536         {
537             /* we don't have to center the video since it takes the
538             whole rectangle area */
539             p_region->i_x = p_sys->i_xoffset
540                             + i_col * ( p_sys->i_width / p_sys->i_cols )
541                             + ( i_col * p_sys->i_vborder ) / p_sys->i_cols;
542             p_region->i_y = p_sys->i_yoffset
543                         + i_row * ( p_sys->i_height / p_sys->i_rows )
544                         + ( i_row * p_sys->i_hborder ) / p_sys->i_rows;
545         }
546
547         if( p_region_prev == NULL )
548         {
549             p_spu->p_region = p_region;
550         }
551         else
552         {
553             p_region_prev->p_next = p_region;
554         }
555
556         p_region_prev = p_region;
557     }
558
559     vlc_mutex_unlock( p_sys->p_lock );
560     vlc_mutex_unlock( &p_sys->lock );
561
562     return p_spu;
563 }
564
565 /*****************************************************************************
566 * Callback to update params on the fly
567 *****************************************************************************/
568 static int MosaicCallback( vlc_object_t *p_this, char const *psz_var,
569                             vlc_value_t oldval, vlc_value_t newval,
570                             void *p_data )
571 {
572     filter_sys_t *p_sys = (filter_sys_t *) p_data;
573     if( !strcmp( psz_var, "mosaic-alpha" ) )
574     {
575         vlc_mutex_lock( &p_sys->lock );
576         msg_Dbg( p_this, "Changing alpha from %d/255 to %d/255",
577                          p_sys->i_alpha, newval.i_int);
578         p_sys->i_alpha = __MIN( __MAX( newval.i_int, 0 ), 255 );
579         vlc_mutex_unlock( &p_sys->lock );
580     }
581     else if( !strcmp( psz_var, "mosaic-height" ) )
582     {
583         vlc_mutex_lock( &p_sys->lock );
584         msg_Dbg( p_this, "Changing height from %dpx to %dpx",
585                           p_sys->i_height, newval.i_int );
586         p_sys->i_height = __MAX( newval.i_int, 0 );
587         vlc_mutex_unlock( &p_sys->lock );
588     }
589     else if( !strcmp( psz_var, "mosaic-width" ) )
590     {
591         vlc_mutex_lock( &p_sys->lock );
592         msg_Dbg( p_this, "Changing width from %dpx to %dpx",
593                          p_sys->i_width, newval.i_int );
594         p_sys->i_width = __MAX( newval.i_int, 0 );
595         vlc_mutex_unlock( &p_sys->lock );
596     }
597     else if( !strcmp( psz_var, "mosaic-xoffset" ) )
598     {
599         vlc_mutex_lock( &p_sys->lock );
600         msg_Dbg( p_this, "Changing x offset from %dpx to %dpx",
601                          p_sys->i_xoffset, newval.i_int );
602         p_sys->i_xoffset = __MAX( newval.i_int, 0 );
603         vlc_mutex_unlock( &p_sys->lock );
604     }
605     else if( !strcmp( psz_var, "mosaic-yoffset" ) )
606     {
607         vlc_mutex_lock( &p_sys->lock );
608         msg_Dbg( p_this, "Changing y offset from %dpx to %dpx",
609                          p_sys->i_yoffset, newval.i_int );
610         p_sys->i_yoffset = __MAX( newval.i_int, 0 );
611         vlc_mutex_unlock( &p_sys->lock );
612     }
613     else if( !strcmp( psz_var, "mosaic-align" ) )
614     {
615         int i_old = 0, i_new = 0;
616         vlc_mutex_lock( &p_sys->lock );
617         newval.i_int = __MIN( __MAX( newval.i_int, 0 ), 10 );
618         if( newval.i_int == 3 || newval.i_int == 7 )
619             newval.i_int = 5;
620         while( pi_align_values[i_old] != p_sys->i_align ) i_old++;
621         while( pi_align_values[i_new] != newval.i_int ) i_new++;
622         msg_Dbg( p_this, "Changing alignment from %d (%s) to %d (%s)",
623                      p_sys->i_align, ppsz_align_descriptions[i_old],
624                      newval.i_int, ppsz_align_descriptions[i_new] );
625         p_sys->i_align = newval.i_int;
626         vlc_mutex_unlock( &p_sys->lock );
627     }
628     else if( !strcmp( psz_var, "mosaic-vborder" ) )
629     {
630         vlc_mutex_lock( &p_sys->lock );
631         msg_Dbg( p_this, "Changing vertical border from %dpx to %dpx",
632                          p_sys->i_vborder, newval.i_int );
633         p_sys->i_vborder = __MAX( newval.i_int, 0 );
634         vlc_mutex_unlock( &p_sys->lock );
635     }
636     else if( !strcmp( psz_var, "mosaic-hborder" ) )
637     {
638         vlc_mutex_lock( &p_sys->lock );
639         msg_Dbg( p_this, "Changing horizontal border from %dpx to %dpx",
640                          p_sys->i_vborder, newval.i_int );
641         p_sys->i_hborder = __MAX( newval.i_int, 0 );
642         vlc_mutex_unlock( &p_sys->lock );
643     }
644     else if( !strcmp( psz_var, "mosaic-position" ) )
645     {
646         if( newval.i_int > 1 || newval.i_int < 0 )
647         {
648             msg_Err( p_this, "Position is either 0 (auto) or 1 (fixed)" );
649         }
650         else
651         {
652             vlc_mutex_lock( &p_sys->lock );
653             msg_Dbg( p_this, "Changing position method from %d (%s) to %d (%s)",
654                              p_sys->i_position, ppsz_pos_descriptions[p_sys->i_position],
655                              newval.i_int, ppsz_pos_descriptions[newval.i_int]);
656             p_sys->i_position = newval.i_int;
657             vlc_mutex_unlock( &p_sys->lock );
658         }
659     }
660     else if( !strcmp( psz_var, "mosaic-rows" ) )
661     {
662         vlc_mutex_lock( &p_sys->lock );
663         msg_Dbg( p_this, "Changing number of rows from %d to %d",
664                          p_sys->i_rows, newval.i_int );
665         p_sys->i_rows = __MAX( newval.i_int, 1 );
666         vlc_mutex_unlock( &p_sys->lock );
667     }
668     else if( !strcmp( psz_var, "mosaic-cols" ) )
669     {
670         vlc_mutex_lock( &p_sys->lock );
671         msg_Dbg( p_this, "Changing number of columns from %d to %d",
672                          p_sys->i_cols, newval.i_int );
673         p_sys->i_cols = __MAX( newval.i_int, 1 );
674         vlc_mutex_unlock( &p_sys->lock );
675     }
676     else if( !strcmp( psz_var, "mosaic-keep-aspect-ratio" ) )
677     {
678         vlc_mutex_lock( &p_sys->lock );
679         if( newval.i_int )
680         {
681             msg_Dbg( p_this, "Keep aspect ratio" );
682             p_sys->b_ar = 1;
683         }
684         else
685         {
686             msg_Dbg( p_this, "Don't keep aspect ratio" );
687             p_sys->b_ar = 0;
688         }
689         vlc_mutex_unlock( &p_sys->lock );
690     }
691     return VLC_SUCCESS;
692 }