src/video_output/vout_intf.c

   1 /*****************************************************************************
   2  * vout_intf.c : video output interface
   3  *****************************************************************************
   4  * Copyright (C) 2000-2007 VLC authors and VideoLAN
   5  *
   6  * Authors: Gildas Bazin <gbazin@videolan.org>
   7  *
   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.
  12  *
  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.
  17  *
  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  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>                                                /* free() */
  35 #include <assert.h>
  36
  37 #include <vlc_block.h>
  38 #include <vlc_modules.h>
  39
  40 #include <vlc_vout.h>
  41 #include <vlc_vout_osd.h>
  42 #include <vlc_strings.h>
  43 #include <vlc_charset.h>
  44 #include "vout_internal.h"
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 /* Object variables callbacks */
  50 static int CropCallback( vlc_object_t *, char const *,
  51                          vlc_value_t, vlc_value_t, void * );
  52 static int CropBorderCallback( vlc_object_t *, char const *,
  53                                vlc_value_t, vlc_value_t, void * );
  54 static int AspectCallback( vlc_object_t *, char const *,
  55                            vlc_value_t, vlc_value_t, void * );
  56 static int AutoScaleCallback( vlc_object_t *, char const *,
  57                               vlc_value_t, vlc_value_t, void * );
  58 static int ZoomCallback( vlc_object_t *, char const *,
  59                          vlc_value_t, vlc_value_t, void * );
  60 static int AboveCallback( vlc_object_t *, char const *,
  61                           vlc_value_t, vlc_value_t, void * );
  62 static int WallPaperCallback( vlc_object_t *, char const *,
  63                               vlc_value_t, vlc_value_t, void * );
  64 static int FullscreenCallback( vlc_object_t *, char const *,
  65                                vlc_value_t, vlc_value_t, void * );
  66 static int SnapshotCallback( vlc_object_t *, char const *,
  67                              vlc_value_t, vlc_value_t, void * );
  68 static int VideoFilterCallback( vlc_object_t *, char const *,
  69                                 vlc_value_t, vlc_value_t, void * );
  70 static int SubSourceCallback( vlc_object_t *, char const *,
  71                               vlc_value_t, vlc_value_t, void * );
  72 static int SubFilterCallback( vlc_object_t *, char const *,
  73                               vlc_value_t, vlc_value_t, void * );
  74 static int SubMarginCallback( vlc_object_t *, char const *,
  75                               vlc_value_t, vlc_value_t, void * );
  76 static int ViewpointCallback( vlc_object_t *, char const *,
  77                               vlc_value_t, vlc_value_t, void * );
  78
  79 /*****************************************************************************
  80  * vout_IntfInit: called during the vout creation to initialise misc things.
  81  *****************************************************************************/
  82 static const struct
  83 {
  84     double f_value;
  85     char psz_label[13];
  86 } p_zoom_values[] = {
  87     { 0.25, N_("1:4 Quarter") },
  88     { 0.5, N_("1:2 Half") },
  89     { 1, N_("1:1 Original") },
  90     { 2, N_("2:1 Double") },
  91 };
  92
  93 static const struct
  94 {
  95     char psz_value[8];
  96     char psz_label[8];
  97 } p_crop_values[] = {
  98     { "", N_("Default") },
  99     { "16:10", "16:10" },
 100     { "16:9", "16:9" },
 101     { "4:3", "4:3" },
 102     { "185:100", "1.85:1" },
 103     { "221:100", "2.21:1" },
 104     { "235:100", "2.35:1" },
 105     { "239:100", "2.39:1" },
 106     { "5:3", "5:3" },
 107     { "5:4", "5:4" },
 108     { "1:1", "1:1" },
 109 };
 110
 111 static const struct
 112 {
 113     char psz_value[8];
 114     char psz_label[8];
 115 } p_aspect_ratio_values[] = {
 116     { "", N_("Default") },
 117     { "16:9", "16:9" },
 118     { "4:3", "4:3" },
 119     { "1:1", "1:1" },
 120     { "16:10", "16:10" },
 121     { "221:100", "2.21:1" },
 122     { "235:100", "2.35:1" },
 123     { "239:100", "2.39:1" },
 124     { "5:4", "5:4" },
 125 };
 126
 127 static void AddCustomRatios( vout_thread_t *p_vout, const char *psz_var,
 128                              char *psz_list )
 129 {
 130     assert( psz_list );
 131
 132     char *psz_cur = psz_list;
 133     char *psz_next;
 134     while( psz_cur && *psz_cur )
 135     {
 136         vlc_value_t val, text;
 137         psz_next = strchr( psz_cur, ',' );
 138         if( psz_next )
 139         {
 140             *psz_next = '\0';
 141             psz_next++;
 142         }
 143         val.psz_string = psz_cur;
 144         text.psz_string = psz_cur;
 145         var_Change( p_vout, psz_var, VLC_VAR_ADDCHOICE, &val, &text);
 146         psz_cur = psz_next;
 147     }
 148 }
 149
 150 void vout_IntfInit( vout_thread_t *p_vout )
 151 {
 152     vlc_value_t val, text;
 153     char *psz_buf;
 154
 155     /* Create a few object variables we'll need later on */
 156     var_Create( p_vout, "snapshot-num", VLC_VAR_INTEGER );
 157     var_SetInteger( p_vout, "snapshot-num", 1 );
 158
 159     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 160     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 161     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 162
 163     var_Create( p_vout, "mouse-hide-timeout",
 164                 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 165
 166     /* Add variables to manage scaling video */
 167     var_Create( p_vout, "autoscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT
 168                 | VLC_VAR_ISCOMMAND );
 169     text.psz_string = _("Autoscale video");
 170     var_Change( p_vout, "autoscale", VLC_VAR_SETTEXT, &text, NULL );
 171     var_AddCallback( p_vout, "autoscale", AutoScaleCallback, NULL );
 172
 173     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_ISCOMMAND |
 174                 VLC_VAR_DOINHERIT );
 175
 176     text.psz_string = _("Zoom");
 177     var_Change( p_vout, "zoom", VLC_VAR_SETTEXT, &text, NULL );
 178
 179     for( size_t i = 0; i < ARRAY_SIZE(p_zoom_values); i++ )
 180     {
 181         val.f_float = p_zoom_values[i].f_value;
 182         text.psz_string = vlc_gettext( p_zoom_values[i].psz_label );
 183         var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 184     }
 185
 186     var_AddCallback( p_vout, "zoom", ZoomCallback, NULL );
 187
 188     /* Crop offset vars */
 189     var_Create( p_vout, "crop-left", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 190     var_Create( p_vout, "crop-top", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 191     var_Create( p_vout, "crop-right", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 192     var_Create( p_vout, "crop-bottom", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 193
 194     var_AddCallback( p_vout, "crop-left", CropBorderCallback, NULL );
 195     var_AddCallback( p_vout, "crop-top", CropBorderCallback, NULL );
 196     var_AddCallback( p_vout, "crop-right", CropBorderCallback, NULL );
 197     var_AddCallback( p_vout, "crop-bottom", CropBorderCallback, NULL );
 198
 199     /* Crop object var */
 200     var_Create( p_vout, "crop", VLC_VAR_STRING | VLC_VAR_ISCOMMAND |
 201                 VLC_VAR_DOINHERIT );
 202
 203     text.psz_string = _("Crop");
 204     var_Change( p_vout, "crop", VLC_VAR_SETTEXT, &text, NULL );
 205
 206     for( size_t i = 0; i < ARRAY_SIZE(p_crop_values); i++ )
 207     {
 208         val.psz_string = (char*)p_crop_values[i].psz_value;
 209         text.psz_string = _( p_crop_values[i].psz_label );
 210         var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 211     }
 212
 213     /* Add custom crop ratios */
 214     psz_buf = var_CreateGetNonEmptyString( p_vout, "custom-crop-ratios" );
 215     if( psz_buf )
 216     {
 217         AddCustomRatios( p_vout, "crop", psz_buf );
 218         free( psz_buf );
 219     }
 220
 221     var_AddCallback( p_vout, "crop", CropCallback, NULL );
 222
 223     /* Monitor pixel aspect-ratio */
 224     var_Create( p_vout, "monitor-par", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 225
 226     /* Aspect-ratio object var */
 227     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_ISCOMMAND |
 228                 VLC_VAR_DOINHERIT );
 229
 230     text.psz_string = _("Aspect ratio");
 231     var_Change( p_vout, "aspect-ratio", VLC_VAR_SETTEXT, &text, NULL );
 232
 233     for( size_t i = 0; i < ARRAY_SIZE(p_aspect_ratio_values); i++ )
 234     {
 235         val.psz_string = (char*)p_aspect_ratio_values[i].psz_value;
 236         text.psz_string = _( p_aspect_ratio_values[i].psz_label );
 237         var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 238     }
 239
 240     /* Add custom aspect ratios */
 241     psz_buf = var_CreateGetNonEmptyString( p_vout, "custom-aspect-ratios" );
 242     if( psz_buf )
 243     {
 244         AddCustomRatios( p_vout, "aspect-ratio", psz_buf );
 245         free( psz_buf );
 246     }
 247
 248     var_AddCallback( p_vout, "aspect-ratio", AspectCallback, NULL );
 249
 250     /* Add a variable to indicate if the window should be on top of others */
 251     var_Create( p_vout, "video-on-top", VLC_VAR_BOOL | VLC_VAR_DOINHERIT
 252                 | VLC_VAR_ISCOMMAND );
 253     text.psz_string = _("Always on top");
 254     var_Change( p_vout, "video-on-top", VLC_VAR_SETTEXT, &text, NULL );
 255     var_AddCallback( p_vout, "video-on-top", AboveCallback, NULL );
 256
 257     /* Add a variable to indicate if the window should be below all others */
 258     var_Create( p_vout, "video-wallpaper", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 259     var_AddCallback( p_vout, "video-wallpaper", WallPaperCallback,
 260                      (void *)(uintptr_t)VOUT_WINDOW_STATE_BELOW );
 261
 262     /* Add a variable to indicate whether we want window decoration or not */
 263     var_Create( p_vout, "video-deco", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 264
 265     /* Add a fullscreen variable */
 266     var_Create( p_vout, "fullscreen",
 267                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
 268     text.psz_string = _("Fullscreen");
 269     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 270     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 271
 272     /* Add a snapshot variable */
 273     var_Create( p_vout, "video-snapshot", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
 274     text.psz_string = _("Snapshot");
 275     var_Change( p_vout, "video-snapshot", VLC_VAR_SETTEXT, &text, NULL );
 276     var_AddCallback( p_vout, "video-snapshot", SnapshotCallback, NULL );
 277
 278     /* Add a video-filter variable */
 279     var_Create( p_vout, "video-filter",
 280                 VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
 281     var_AddCallback( p_vout, "video-filter", VideoFilterCallback, NULL );
 282
 283     /* Add a sub-source variable */
 284     var_Create( p_vout, "sub-source",
 285                 VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
 286     var_AddCallback( p_vout, "sub-source", SubSourceCallback, NULL );
 287
 288     /* Add a sub-filter variable */
 289     var_Create( p_vout, "sub-filter",
 290                 VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
 291     var_AddCallback( p_vout, "sub-filter", SubFilterCallback, NULL );
 292
 293     /* Add sub-margin variable */
 294     var_Create( p_vout, "sub-margin",
 295                 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
 296     var_AddCallback( p_vout, "sub-margin", SubMarginCallback, NULL );
 297
 298     /* Mouse coordinates */
 299     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 300     var_Create( p_vout, "mouse-moved", VLC_VAR_COORDS );
 301     var_Create( p_vout, "mouse-clicked", VLC_VAR_COORDS );
 302
 303     /* Viewpoint */
 304     var_Create( p_vout, "viewpoint", VLC_VAR_ADDRESS  | VLC_VAR_DOINHERIT );
 305     var_AddCallback( p_vout, "viewpoint", ViewpointCallback, NULL );
 306     var_Create( p_vout, "viewpoint-changeable", VLC_VAR_BOOL );
 307
 308     vout_IntfReinit( p_vout );
 309 }
 310
 311 void vout_IntfReinit( vout_thread_t *p_vout )
 312 {
 313     var_TriggerCallback( p_vout, "zoom" );
 314     var_TriggerCallback( p_vout, "crop" );
 315     var_TriggerCallback( p_vout, "aspect-ratio" );
 316
 317     var_TriggerCallback( p_vout, "video-on-top" );
 318     var_TriggerCallback( p_vout, "video-wallpaper" );
 319
 320     var_TriggerCallback( p_vout, "video-filter" );
 321     var_TriggerCallback( p_vout, "sub-source" );
 322     var_TriggerCallback( p_vout, "sub-filter" );
 323     var_TriggerCallback( p_vout, "sub-margin" );
 324     var_TriggerCallback( p_vout, "viewpoint" );
 325 }
 326
 327 /*****************************************************************************
 328  * vout_Snapshot: generates a snapshot.
 329  *****************************************************************************/
 330 /**
 331  * This function will inject a subpicture into the vout with the provided
 332  * picture
 333  */
 334 static int VoutSnapshotPip( vout_thread_t *p_vout, picture_t *p_pic )
 335 {
 336     subpicture_t *p_subpic = subpicture_NewFromPicture( VLC_OBJECT(p_vout),
 337                                                         p_pic, VLC_CODEC_YUVA );
 338     if( !p_subpic )
 339         return VLC_EGENERIC;
 340
 341     /* FIXME SPU_DEFAULT_CHANNEL is not good (used by the text) but
 342      * hardcoded 0 doesn't seem right */
 343     p_subpic->i_channel = 0;
 344     p_subpic->i_start = mdate();
 345     p_subpic->i_stop  = p_subpic->i_start + 4000000;
 346     p_subpic->b_ephemer = true;
 347     p_subpic->b_fade = true;
 348
 349     /* Reduce the picture to 1/4^2 of the screen */
 350     p_subpic->i_original_picture_width  *= 4;
 351     p_subpic->i_original_picture_height *= 4;
 352
 353     vout_PutSubpicture( p_vout, p_subpic );
 354     return VLC_SUCCESS;
 355 }
 356
 357 /**
 358  * This function will display the name and a PIP of the provided snapshot
 359  */
 360 static void VoutOsdSnapshot( vout_thread_t *p_vout, picture_t *p_pic, const char *psz_filename )
 361 {
 362     msg_Dbg( p_vout, "snapshot taken (%s)", psz_filename );
 363     vout_OSDMessage( p_vout, VOUT_SPU_CHANNEL_OSD, "%s", psz_filename );
 364
 365     if( var_InheritBool( p_vout, "snapshot-preview" ) )
 366     {
 367         if( VoutSnapshotPip( p_vout, p_pic ) )
 368             msg_Warn( p_vout, "Failed to display snapshot" );
 369     }
 370 }
 371
 372 /**
 373  * This function will handle a snapshot request
 374  */
 375 static void VoutSaveSnapshot( vout_thread_t *p_vout )
 376 {
 377     char *psz_path = var_InheritString( p_vout, "snapshot-path" );
 378     char *psz_format = var_InheritString( p_vout, "snapshot-format" );
 379     char *psz_prefix = var_InheritString( p_vout, "snapshot-prefix" );
 380
 381     /* */
 382     picture_t *p_picture;
 383     block_t *p_image;
 384     video_format_t fmt;
 385
 386     /* 500ms timeout
 387      * XXX it will cause trouble with low fps video (< 2fps) */
 388     if( vout_GetSnapshot( p_vout, &p_image, &p_picture, &fmt, psz_format, 500*1000 ) )
 389     {
 390         p_picture = NULL;
 391         p_image = NULL;
 392         goto exit;
 393     }
 394
 395     if( !psz_path )
 396     {
 397         psz_path = vout_snapshot_GetDirectory();
 398         if( !psz_path )
 399         {
 400             msg_Err( p_vout, "no path specified for snapshots" );
 401             goto exit;
 402         }
 403     }
 404
 405     vout_snapshot_save_cfg_t cfg;
 406     memset( &cfg, 0, sizeof(cfg) );
 407     cfg.is_sequential = var_InheritBool( p_vout, "snapshot-sequential" );
 408     cfg.sequence = var_GetInteger( p_vout, "snapshot-num" );
 409     cfg.path = psz_path;
 410     cfg.format = psz_format;
 411     cfg.prefix_fmt = psz_prefix;
 412
 413     char *psz_filename;
 414     int  i_sequence;
 415     if (vout_snapshot_SaveImage( &psz_filename, &i_sequence,
 416                                  p_image, p_vout, &cfg ) )
 417         goto exit;
 418     if( cfg.is_sequential )
 419         var_SetInteger( p_vout, "snapshot-num", i_sequence + 1 );
 420
 421     VoutOsdSnapshot( p_vout, p_picture, psz_filename );
 422
 423     /* signal creation of a new snapshot file */
 424     var_SetString( p_vout->obj.libvlc, "snapshot-file", psz_filename );
 425
 426     free( psz_filename );
 427
 428 exit:
 429     if( p_image )
 430         block_Release( p_image );
 431     if( p_picture )
 432         picture_Release( p_picture );
 433     free( psz_prefix );
 434     free( psz_format );
 435     free( psz_path );
 436 }
 437
 438 /*****************************************************************************
 439  * Object variables callbacks
 440  *****************************************************************************/
 441 static int CropCallback( vlc_object_t *object, char const *cmd,
 442                          vlc_value_t oldval, vlc_value_t newval, void *data )
 443 {
 444     vout_thread_t *vout = (vout_thread_t *)object;
 445     VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data);
 446     unsigned num, den;
 447     unsigned y, x;
 448     unsigned width, height;
 449     unsigned left, top, right, bottom;
 450
 451     if (sscanf(newval.psz_string, "%u:%u", &num, &den) == 2) {
 452         vout_ControlChangeCropRatio(vout, num, den);
 453     } else if (sscanf(newval.psz_string, "%ux%u+%u+%u",
 454                       &width, &height, &x, &y) == 4) {
 455         vout_ControlChangeCropWindow(vout, x, y, width, height);
 456     } else if (sscanf(newval.psz_string, "%u+%u+%u+%u",
 457                     &left, &top, &right, &bottom) == 4) {
 458         vout_ControlChangeCropBorder(vout, left, top, right, bottom);
 459     } else if (*newval.psz_string == '\0') {
 460         vout_ControlChangeCropRatio(vout, 0, 0);
 461     } else {
 462         msg_Err(object, "Unknown crop format (%s)", newval.psz_string);
 463     }
 464     return VLC_SUCCESS;
 465 }
 466
 467 static int CropBorderCallback(vlc_object_t *object, char const *cmd,
 468                               vlc_value_t oldval, vlc_value_t newval, void *data)
 469 {
 470     char buf[4 * 21];
 471
 472     snprintf(buf, sizeof (buf), "%"PRIu64"+%"PRIu64"+%"PRIu64"+%"PRIu64,
 473              var_GetInteger(object, "crop-left"),
 474              var_GetInteger(object, "crop-top"),
 475              var_GetInteger(object, "crop-right"),
 476              var_GetInteger(object, "crop-bottom"));
 477     var_SetString(object, "crop", buf);
 478
 479     VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data); VLC_UNUSED(newval);
 480     return VLC_SUCCESS;
 481 }
 482
 483 static int AspectCallback( vlc_object_t *object, char const *cmd,
 484                          vlc_value_t oldval, vlc_value_t newval, void *data )
 485 {
 486     vout_thread_t *vout = (vout_thread_t *)object;
 487     VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data);
 488     unsigned num, den;
 489
 490     if (sscanf(newval.psz_string, "%u:%u", &num, &den) == 2 &&
 491         (num != 0) == (den != 0))
 492         vout_ControlChangeSampleAspectRatio(vout, num, den);
 493     else if (*newval.psz_string == '\0')
 494         vout_ControlChangeSampleAspectRatio(vout, 0, 0);
 495     return VLC_SUCCESS;
 496 }
 497
 498 static int AutoScaleCallback( vlc_object_t *obj, char const *name,
 499                               vlc_value_t prev, vlc_value_t cur, void *data )
 500 {
 501     vout_thread_t *p_vout = (vout_thread_t *)obj;
 502
 503     (void) name; (void) prev; (void) data;
 504     vout_ControlChangeDisplayFilled( p_vout, cur.b_bool );
 505     return VLC_SUCCESS;
 506 }
 507
 508 static int ZoomCallback( vlc_object_t *obj, char const *name,
 509                          vlc_value_t prev, vlc_value_t cur, void *data )
 510 {
 511     vout_thread_t *p_vout = (vout_thread_t *)obj;
 512
 513     (void) name; (void) prev; (void) data;
 514     vout_ControlChangeZoom( p_vout, 1000 * cur.f_float, 1000 );
 515     return VLC_SUCCESS;
 516 }
 517
 518 static int AboveCallback( vlc_object_t *obj, char const *name,
 519                           vlc_value_t prev, vlc_value_t cur, void *data )
 520 {
 521     vout_ControlChangeWindowState( (vout_thread_t *)obj,
 522         cur.b_bool ? VOUT_WINDOW_STATE_ABOVE : VOUT_WINDOW_STATE_NORMAL );
 523     (void) name; (void) prev; (void) data;
 524     return VLC_SUCCESS;
 525 }
 526
 527 static int WallPaperCallback( vlc_object_t *obj, char const *name,
 528                               vlc_value_t prev, vlc_value_t cur, void *data )
 529 {
 530     vout_thread_t *vout = (vout_thread_t *)obj;
 531
 532     if( cur.b_bool )
 533     {
 534         vout_ControlChangeWindowState( vout, VOUT_WINDOW_STATE_BELOW );
 535         vout_ControlChangeFullscreen( vout, true );
 536     }
 537     else
 538     {
 539         var_TriggerCallback( obj, "fullscreen" );
 540         var_TriggerCallback( obj, "video-on-top" );
 541     }
 542     (void) name; (void) prev; (void) data;
 543     return VLC_SUCCESS;
 544 }
 545
 546 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
 547                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 548 {
 549     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 550     (void)psz_cmd; (void)p_data;
 551
 552     if( oldval.b_bool != newval.b_bool )
 553         vout_ControlChangeFullscreen( p_vout, newval.b_bool );
 554     return VLC_SUCCESS;
 555 }
 556
 557 static int SnapshotCallback( vlc_object_t *p_this, char const *psz_cmd,
 558                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 559 {
 560     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 561     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 562     VLC_UNUSED(newval); VLC_UNUSED(p_data);
 563
 564     VoutSaveSnapshot( p_vout );
 565     return VLC_SUCCESS;
 566 }
 567
 568 static int VideoFilterCallback( vlc_object_t *p_this, char const *psz_cmd,
 569                                 vlc_value_t oldval, vlc_value_t newval, void *p_data)
 570 {
 571     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 572     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 573
 574     vout_ControlChangeFilters( p_vout, newval.psz_string );
 575     return VLC_SUCCESS;
 576 }
 577
 578 static int SubSourceCallback( vlc_object_t *p_this, char const *psz_cmd,
 579                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 580 {
 581     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 582     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 583
 584     vout_ControlChangeSubSources( p_vout, newval.psz_string );
 585     return VLC_SUCCESS;
 586 }
 587
 588 static int SubFilterCallback( vlc_object_t *p_this, char const *psz_cmd,
 589                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 590 {
 591     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 592     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 593
 594     vout_ControlChangeSubFilters( p_vout, newval.psz_string );
 595     return VLC_SUCCESS;
 596 }
 597
 598 static int SubMarginCallback( vlc_object_t *p_this, char const *psz_cmd,
 599                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 600 {
 601     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 602     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 603
 604     vout_ControlChangeSubMargin( p_vout, newval.i_int );
 605     return VLC_SUCCESS;
 606 }
 607
 608 static int ViewpointCallback( vlc_object_t *p_this, char const *psz_cmd,
 609                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 610 {
 611     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 612     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 613
 614     if( newval.p_address != NULL )
 615         vout_ControlChangeViewpoint( p_vout, newval.p_address );
 616     return VLC_SUCCESS;
 617 }