1 /*****************************************************************************
2 * vout_intf.c : video output interface
3 *****************************************************************************
4 * Copyright (C) 2000-2007 VLC authors and VideoLAN
6 * Authors: Gildas Bazin <gbazin@videolan.org>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU Lesser General Public License as published by
10 * the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21 *****************************************************************************/
23 /*****************************************************************************
25 *****************************************************************************/
31 #include <vlc_common.h>
34 #include <stdlib.h> /* free() */
37 #include <vlc_block.h>
38 #include <vlc_modules.h>
41 #include <vlc_vout_osd.h>
42 #include <vlc_strings.h>
43 #include <vlc_charset.h>
44 #include "vout_internal.h"
46 /*****************************************************************************
48 *****************************************************************************/
49 /* Object variables callbacks */
50 static int ZoomCallback( vlc_object_t *, char const *,
51 vlc_value_t, vlc_value_t, void * );
52 static int CropCallback( vlc_object_t *, char const *,
53 vlc_value_t, vlc_value_t, void * );
54 static int CropBorderCallback( vlc_object_t *, char const *,
55 vlc_value_t, vlc_value_t, void * );
56 static int AspectCallback( vlc_object_t *, char const *,
57 vlc_value_t, vlc_value_t, void * );
58 static int ScalingCallback( vlc_object_t *, char const *,
59 vlc_value_t, vlc_value_t, void * );
60 static int OnTopCallback( vlc_object_t *, char const *,
61 vlc_value_t, vlc_value_t, void * );
62 static int FullscreenCallback( vlc_object_t *, char const *,
63 vlc_value_t, vlc_value_t, void * );
64 static int SnapshotCallback( vlc_object_t *, char const *,
65 vlc_value_t, vlc_value_t, void * );
66 static int VideoFilterCallback( vlc_object_t *, char const *,
67 vlc_value_t, vlc_value_t, void * );
68 static int SubSourceCallback( vlc_object_t *, char const *,
69 vlc_value_t, vlc_value_t, void * );
70 static int SubFilterCallback( vlc_object_t *, char const *,
71 vlc_value_t, vlc_value_t, void * );
72 static int SubMarginCallback( vlc_object_t *, char const *,
73 vlc_value_t, vlc_value_t, void * );
75 /*****************************************************************************
76 * vout_IntfInit: called during the vout creation to initialise misc things.
77 *****************************************************************************/
83 { 0.25, N_("1:4 Quarter") },
84 { 0.5, N_("1:2 Half") },
85 { 1, N_("1:1 Original") },
86 { 2, N_("2:1 Double") },
94 { "", N_("Default") },
97 { "185:100", "1.85:1" },
98 { "221:100", "2.21:1" },
99 { "235:100", "2.35:1" },
100 { "239:100", "2.39:1" },
111 } p_aspect_ratio_values[] = {
112 { "", N_("Default") },
116 { "16:10", "16:10" },
117 { "221:100", "2.21:1" },
118 { "235:100", "2.35:1" },
119 { "239:100", "2.39:1" },
123 static void AddCustomRatios( vout_thread_t *p_vout, const char *psz_var,
128 char *psz_cur = psz_list;
130 while( psz_cur && *psz_cur )
132 vlc_value_t val, text;
133 psz_next = strchr( psz_cur, ',' );
139 val.psz_string = psz_cur;
140 text.psz_string = psz_cur;
141 var_Change( p_vout, psz_var, VLC_VAR_ADDCHOICE, &val, &text);
146 void vout_IntfInit( vout_thread_t *p_vout )
148 vlc_value_t val, text, old_val;
151 /* Create a few object variables we'll need later on */
152 var_Create( p_vout, "snapshot-num", VLC_VAR_INTEGER );
153 var_SetInteger( p_vout, "snapshot-num", 1 );
155 var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
156 var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
157 var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
159 var_Create( p_vout, "video-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
160 var_Create( p_vout, "video-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
162 var_Create( p_vout, "mouse-hide-timeout",
163 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
165 /* Zoom object var */
166 var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_ISCOMMAND |
167 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
169 text.psz_string = _("Zoom");
170 var_Change( p_vout, "zoom", VLC_VAR_SETTEXT, &text, NULL );
172 var_Get( p_vout, "zoom", &old_val );
174 for( size_t i = 0; i < ARRAY_SIZE(p_zoom_values); i++ )
176 if( old_val.f_float == p_zoom_values[i].f_value )
177 var_Change( p_vout, "zoom", VLC_VAR_DELCHOICE, &old_val, NULL );
178 val.f_float = p_zoom_values[i].f_value;
179 text.psz_string = _( p_zoom_values[i].psz_label );
180 var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
183 var_Set( p_vout, "zoom", old_val ); /* Is this really needed? */
185 var_AddCallback( p_vout, "zoom", ZoomCallback, NULL );
187 /* Crop offset vars */
188 var_Create( p_vout, "crop-left", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
189 var_Create( p_vout, "crop-top", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
190 var_Create( p_vout, "crop-right", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
191 var_Create( p_vout, "crop-bottom", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
193 var_AddCallback( p_vout, "crop-left", CropBorderCallback, NULL );
194 var_AddCallback( p_vout, "crop-top", CropBorderCallback, NULL );
195 var_AddCallback( p_vout, "crop-right", CropBorderCallback, NULL );
196 var_AddCallback( p_vout, "crop-bottom", CropBorderCallback, NULL );
198 /* Crop object var */
199 var_Create( p_vout, "crop", VLC_VAR_STRING | VLC_VAR_ISCOMMAND |
200 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
202 text.psz_string = _("Crop");
203 var_Change( p_vout, "crop", VLC_VAR_SETTEXT, &text, NULL );
205 val.psz_string = (char*)"";
206 var_Change( p_vout, "crop", VLC_VAR_DELCHOICE, &val, 0 );
208 for( size_t i = 0; i < ARRAY_SIZE(p_crop_values); i++ )
210 val.psz_string = (char*)p_crop_values[i].psz_value;
211 text.psz_string = _( p_crop_values[i].psz_label );
212 var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
215 /* Add custom crop ratios */
216 psz_buf = var_CreateGetNonEmptyString( p_vout, "custom-crop-ratios" );
219 AddCustomRatios( p_vout, "crop", psz_buf );
223 var_AddCallback( p_vout, "crop", CropCallback, NULL );
224 var_Get( p_vout, "crop", &old_val );
225 if( old_val.psz_string && *old_val.psz_string )
226 var_TriggerCallback( p_vout, "crop" );
227 free( old_val.psz_string );
229 /* Monitor pixel aspect-ratio */
230 var_Create( p_vout, "monitor-par", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
232 /* Aspect-ratio object var */
233 var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_ISCOMMAND |
234 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
236 text.psz_string = _("Aspect ratio");
237 var_Change( p_vout, "aspect-ratio", VLC_VAR_SETTEXT, &text, NULL );
239 val.psz_string = (char*)"";
240 var_Change( p_vout, "aspect-ratio", VLC_VAR_DELCHOICE, &val, 0 );
242 for( size_t i = 0; i < ARRAY_SIZE(p_aspect_ratio_values); i++ )
244 val.psz_string = (char*)p_aspect_ratio_values[i].psz_value;
245 text.psz_string = _( p_aspect_ratio_values[i].psz_label );
246 var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
249 /* Add custom aspect ratios */
250 psz_buf = var_CreateGetNonEmptyString( p_vout, "custom-aspect-ratios" );
253 AddCustomRatios( p_vout, "aspect-ratio", psz_buf );
257 var_AddCallback( p_vout, "aspect-ratio", AspectCallback, NULL );
258 var_Get( p_vout, "aspect-ratio", &old_val );
259 if( (old_val.psz_string && *old_val.psz_string) )
260 var_TriggerCallback( p_vout, "aspect-ratio" );
261 free( old_val.psz_string );
263 /* Add variables to manage scaling video */
264 var_Create( p_vout, "autoscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT
265 | VLC_VAR_ISCOMMAND );
266 text.psz_string = _("Autoscale video");
267 var_Change( p_vout, "autoscale", VLC_VAR_SETTEXT, &text, NULL );
268 var_AddCallback( p_vout, "autoscale", ScalingCallback, NULL );
270 var_Create( p_vout, "scale", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT
271 | VLC_VAR_ISCOMMAND );
272 text.psz_string = _("Scale factor");
273 var_Change( p_vout, "scale", VLC_VAR_SETTEXT, &text, NULL );
274 var_AddCallback( p_vout, "scale", ScalingCallback, NULL );
276 /* Add a variable to indicate if the window should be on top of others */
277 var_Create( p_vout, "video-on-top", VLC_VAR_BOOL | VLC_VAR_DOINHERIT
278 | VLC_VAR_ISCOMMAND );
279 text.psz_string = _("Always on top");
280 var_Change( p_vout, "video-on-top", VLC_VAR_SETTEXT, &text, NULL );
281 var_AddCallback( p_vout, "video-on-top", OnTopCallback, NULL );
282 var_TriggerCallback( p_vout, "video-on-top" );
284 /* Add a variable to indicate whether we want window decoration or not */
285 var_Create( p_vout, "video-deco", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
287 /* Add a fullscreen variable */
288 var_Create( p_vout, "fullscreen",
289 VLC_VAR_BOOL | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
290 text.psz_string = _("Fullscreen");
291 var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
292 var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
294 /* Add a snapshot variable */
295 var_Create( p_vout, "video-snapshot", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
296 text.psz_string = _("Snapshot");
297 var_Change( p_vout, "video-snapshot", VLC_VAR_SETTEXT, &text, NULL );
298 var_AddCallback( p_vout, "video-snapshot", SnapshotCallback, NULL );
300 /* Add a video-filter variable */
301 var_Create( p_vout, "video-filter",
302 VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
303 var_AddCallback( p_vout, "video-filter", VideoFilterCallback, NULL );
304 var_TriggerCallback( p_vout, "video-filter" );
306 /* Add a sub-source variable */
307 var_Create( p_vout, "sub-source",
308 VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
309 var_AddCallback( p_vout, "sub-source", SubSourceCallback, NULL );
310 var_TriggerCallback( p_vout, "sub-source" );
312 /* Add a sub-filter variable */
313 var_Create( p_vout, "sub-filter",
314 VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
315 var_AddCallback( p_vout, "sub-filter", SubFilterCallback, NULL );
316 var_TriggerCallback( p_vout, "sub-filter" );
318 /* Add sub-margin variable */
319 var_Create( p_vout, "sub-margin",
320 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
321 var_AddCallback( p_vout, "sub-margin", SubMarginCallback, NULL );
322 var_TriggerCallback( p_vout, "sub-margin" );
324 /* Mouse coordinates */
325 var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
326 var_Create( p_vout, "mouse-moved", VLC_VAR_COORDS );
327 var_Create( p_vout, "mouse-clicked", VLC_VAR_COORDS );
328 var_Create( p_vout, "mouse-object", VLC_VAR_BOOL );
331 /*****************************************************************************
332 * vout_Snapshot: generates a snapshot.
333 *****************************************************************************/
335 * This function will inject a subpicture into the vout with the provided
338 static int VoutSnapshotPip( vout_thread_t *p_vout, picture_t *p_pic )
340 subpicture_t *p_subpic = subpicture_NewFromPicture( VLC_OBJECT(p_vout),
341 p_pic, VLC_CODEC_YUVA );
345 /* FIXME SPU_DEFAULT_CHANNEL is not good (used by the text) but
346 * hardcoded 0 doesn't seem right */
347 p_subpic->i_channel = 0;
348 p_subpic->i_start = mdate();
349 p_subpic->i_stop = p_subpic->i_start + 4000000;
350 p_subpic->b_ephemer = true;
351 p_subpic->b_fade = true;
353 /* Reduce the picture to 1/4^2 of the screen */
354 p_subpic->i_original_picture_width *= 4;
355 p_subpic->i_original_picture_height *= 4;
357 vout_PutSubpicture( p_vout, p_subpic );
362 * This function will display the name and a PIP of the provided snapshot
364 static void VoutOsdSnapshot( vout_thread_t *p_vout, picture_t *p_pic, const char *psz_filename )
366 msg_Dbg( p_vout, "snapshot taken (%s)", psz_filename );
367 vout_OSDMessage( p_vout, SPU_DEFAULT_CHANNEL, "%s", psz_filename );
369 if( var_InheritBool( p_vout, "snapshot-preview" ) )
371 if( VoutSnapshotPip( p_vout, p_pic ) )
372 msg_Warn( p_vout, "Failed to display snapshot" );
377 * This function will handle a snapshot request
379 static void VoutSaveSnapshot( vout_thread_t *p_vout )
381 char *psz_path = var_InheritString( p_vout, "snapshot-path" );
382 char *psz_format = var_InheritString( p_vout, "snapshot-format" );
383 char *psz_prefix = var_InheritString( p_vout, "snapshot-prefix" );
386 picture_t *p_picture;
391 * XXX it will cause trouble with low fps video (< 2fps) */
392 if( vout_GetSnapshot( p_vout, &p_image, &p_picture, &fmt, psz_format, 500*1000 ) )
401 psz_path = vout_snapshot_GetDirectory();
404 msg_Err( p_vout, "no path specified for snapshots" );
409 vout_snapshot_save_cfg_t cfg;
410 memset( &cfg, 0, sizeof(cfg) );
411 cfg.is_sequential = var_InheritBool( p_vout, "snapshot-sequential" );
412 cfg.sequence = var_GetInteger( p_vout, "snapshot-num" );
414 cfg.format = psz_format;
415 cfg.prefix_fmt = psz_prefix;
419 if (vout_snapshot_SaveImage( &psz_filename, &i_sequence,
420 p_image, VLC_OBJECT(p_vout), &cfg ) )
422 if( cfg.is_sequential )
423 var_SetInteger( p_vout, "snapshot-num", i_sequence + 1 );
425 VoutOsdSnapshot( p_vout, p_picture, psz_filename );
427 /* signal creation of a new snapshot file */
428 var_SetString( p_vout->p_libvlc, "snapshot-file", psz_filename );
430 free( psz_filename );
434 block_Release( p_image );
436 picture_Release( p_picture );
442 /*****************************************************************************
444 *****************************************************************************/
446 void vout_EnableFilter( vout_thread_t *p_vout, const char *psz_name,
447 bool b_add, bool b_setconfig )
451 const char *psz_filter_type;
453 module_t *p_obj = module_find( psz_name );
456 msg_Err( p_vout, "Unable to find filter module \"%s\".", psz_name );
460 if( module_provides( p_obj, "video filter2" ) )
462 psz_filter_type = "video-filter";
464 else if( module_provides( p_obj, "sub source" ) )
466 psz_filter_type = "sub-source";
468 else if( module_provides( p_obj, "sub filter" ) )
470 psz_filter_type = "sub-filter";
474 msg_Err( p_vout, "Unknown video filter type." );
478 psz_string = var_GetString( p_vout, psz_filter_type );
480 /* Todo : Use some generic chain manipulation functions */
481 if( !psz_string ) psz_string = strdup("");
483 psz_parser = strstr( psz_string, psz_name );
488 psz_parser = psz_string;
489 if( asprintf( &psz_string, (*psz_string) ? "%s:%s" : "%s%s",
490 psz_string, psz_name ) == -1 )
504 memmove( psz_parser, psz_parser + strlen(psz_name) +
505 (*(psz_parser + strlen(psz_name)) == ':' ? 1 : 0 ),
506 strlen(psz_parser + strlen(psz_name)) + 1 );
508 /* Remove trailing : : */
509 if( *(psz_string+strlen(psz_string ) -1 ) == ':' )
511 *(psz_string+strlen(psz_string ) -1 ) = '\0';
523 config_PutPsz( p_vout, psz_filter_type, psz_string );
526 var_SetString( p_vout, psz_filter_type, psz_string );
531 /*****************************************************************************
532 * Object variables callbacks
533 *****************************************************************************/
534 static int ZoomCallback( vlc_object_t *p_this, char const *psz_cmd,
535 vlc_value_t oldval, vlc_value_t newval, void *p_data )
537 (void)psz_cmd; (void)oldval; (void)p_data;
539 return var_SetFloat( p_this, "scale", newval.f_float );
542 static int CropCallback( vlc_object_t *object, char const *cmd,
543 vlc_value_t oldval, vlc_value_t newval, void *data )
545 vout_thread_t *vout = (vout_thread_t *)object;
546 VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data);
549 unsigned width, height;
550 unsigned left, top, right, bottom;
552 if (sscanf(newval.psz_string, "%u:%u", &num, &den) == 2) {
553 vout_ControlChangeCropRatio(vout, num, den);
554 } else if (sscanf(newval.psz_string, "%ux%u+%u+%u",
555 &width, &height, &x, &y) == 4) {
556 vout_ControlChangeCropWindow(vout, x, y, width, height);
557 } else if (sscanf(newval.psz_string, "%u+%u+%u+%u",
558 &left, &top, &right, &bottom) == 4) {
559 vout_ControlChangeCropBorder(vout, left, top, right, bottom);
560 } else if (*newval.psz_string == '\0') {
561 vout_ControlChangeCropRatio(vout, 0, 0);
563 msg_Err(object, "Unknown crop format (%s)", newval.psz_string);
568 static int CropBorderCallback(vlc_object_t *object, char const *cmd,
569 vlc_value_t oldval, vlc_value_t newval, void *data)
571 vout_thread_t *vout = (vout_thread_t *)object;
572 VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data); VLC_UNUSED(newval);
574 vout_ControlChangeCropBorder(vout,
575 var_GetInteger(object, "crop-left"),
576 var_GetInteger(object, "crop-top"),
577 var_GetInteger(object, "crop-right"),
578 var_GetInteger(object, "crop-bottom"));
582 static int AspectCallback( vlc_object_t *object, char const *cmd,
583 vlc_value_t oldval, vlc_value_t newval, void *data )
585 vout_thread_t *vout = (vout_thread_t *)object;
586 VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data);
589 if (sscanf(newval.psz_string, "%u:%u", &num, &den) == 2 &&
590 (num > 0) == (den > 0))
591 vout_ControlChangeSampleAspectRatio(vout, num, den);
592 else if (*newval.psz_string == '\0')
593 vout_ControlChangeSampleAspectRatio(vout, 0, 0);
597 static int ScalingCallback( vlc_object_t *p_this, char const *psz_cmd,
598 vlc_value_t oldval, vlc_value_t newval, void *p_data )
600 vout_thread_t *p_vout = (vout_thread_t *)p_this;
601 (void)oldval; (void)newval; (void)p_data;
603 if( !strcmp( psz_cmd, "autoscale" ) )
604 vout_ControlChangeDisplayFilled( p_vout, newval.b_bool );
605 else if( !strcmp( psz_cmd, "scale" ) )
606 vout_ControlChangeZoom( p_vout, 1000 * newval.f_float, 1000 );
611 static int OnTopCallback( vlc_object_t *p_this, char const *psz_cmd,
612 vlc_value_t oldval, vlc_value_t newval, void *p_data )
614 vout_thread_t *p_vout = (vout_thread_t *)p_this;
615 (void)psz_cmd; (void)oldval; (void)p_data;
617 vout_ControlChangeOnTop( p_vout, newval.b_bool );
621 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
622 vlc_value_t oldval, vlc_value_t newval, void *p_data )
624 vout_thread_t *p_vout = (vout_thread_t *)p_this;
625 (void)psz_cmd; (void)p_data;
627 if( oldval.b_bool != newval.b_bool )
628 vout_ControlChangeFullscreen( p_vout, newval.b_bool );
632 static int SnapshotCallback( vlc_object_t *p_this, char const *psz_cmd,
633 vlc_value_t oldval, vlc_value_t newval, void *p_data )
635 vout_thread_t *p_vout = (vout_thread_t *)p_this;
636 VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
637 VLC_UNUSED(newval); VLC_UNUSED(p_data);
639 VoutSaveSnapshot( p_vout );
643 static int VideoFilterCallback( vlc_object_t *p_this, char const *psz_cmd,
644 vlc_value_t oldval, vlc_value_t newval, void *p_data)
646 vout_thread_t *p_vout = (vout_thread_t *)p_this;
647 VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
649 vout_ControlChangeFilters( p_vout, newval.psz_string );
653 static int SubSourceCallback( vlc_object_t *p_this, char const *psz_cmd,
654 vlc_value_t oldval, vlc_value_t newval, void *p_data)
656 vout_thread_t *p_vout = (vout_thread_t *)p_this;
657 VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
659 vout_ControlChangeSubSources( p_vout, newval.psz_string );
663 static int SubFilterCallback( vlc_object_t *p_this, char const *psz_cmd,
664 vlc_value_t oldval, vlc_value_t newval, void *p_data)
666 vout_thread_t *p_vout = (vout_thread_t *)p_this;
667 VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
669 vout_ControlChangeSubFilters( p_vout, newval.psz_string );
673 static int SubMarginCallback( vlc_object_t *p_this, char const *psz_cmd,
674 vlc_value_t oldval, vlc_value_t newval, void *p_data)
676 vout_thread_t *p_vout = (vout_thread_t *)p_this;
677 VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
679 vout_ControlChangeSubMargin( p_vout, newval.i_int );