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     /* Device orientation */
 304     var_Create( p_vout, "viewpoint-moved", VLC_VAR_ADDRESS );
 305
 306     /* Viewpoint */
 307     var_Create( p_vout, "viewpoint", VLC_VAR_ADDRESS  );
 308     var_AddCallback( p_vout, "viewpoint", ViewpointCallback, NULL );
 309     var_Create( p_vout, "viewpoint-changeable", VLC_VAR_BOOL );
 310
 311     vout_IntfReinit( p_vout );
 312 }
 313
 314 void vout_IntfReinit( vout_thread_t *p_vout )
 315 {
 316     var_TriggerCallback( p_vout, "zoom" );
 317     var_TriggerCallback( p_vout, "crop" );
 318     var_TriggerCallback( p_vout, "aspect-ratio" );
 319
 320     var_TriggerCallback( p_vout, "video-on-top" );
 321     var_TriggerCallback( p_vout, "video-wallpaper" );
 322
 323     var_TriggerCallback( p_vout, "video-filter" );
 324     var_TriggerCallback( p_vout, "sub-source" );
 325     var_TriggerCallback( p_vout, "sub-filter" );
 326     var_TriggerCallback( p_vout, "sub-margin" );
 327 }
 328
 329 /*****************************************************************************
 330  * vout_Snapshot: generates a snapshot.
 331  *****************************************************************************/
 332 /**
 333  * This function will inject a subpicture into the vout with the provided
 334  * picture
 335  */
 336 static int VoutSnapshotPip( vout_thread_t *p_vout, picture_t *p_pic )
 337 {
 338     subpicture_t *p_subpic = subpicture_NewFromPicture( VLC_OBJECT(p_vout),
 339                                                         p_pic, VLC_CODEC_YUVA );
 340     if( !p_subpic )
 341         return VLC_EGENERIC;
 342
 343     /* FIXME SPU_DEFAULT_CHANNEL is not good (used by the text) but
 344      * hardcoded 0 doesn't seem right */
 345     p_subpic->i_channel = 0;
 346     p_subpic->i_start = mdate();
 347     p_subpic->i_stop  = p_subpic->i_start + 4000000;
 348     p_subpic->b_ephemer = true;
 349     p_subpic->b_fade = true;
 350
 351     /* Reduce the picture to 1/4^2 of the screen */
 352     p_subpic->i_original_picture_width  *= 4;
 353     p_subpic->i_original_picture_height *= 4;
 354
 355     vout_PutSubpicture( p_vout, p_subpic );
 356     return VLC_SUCCESS;
 357 }
 358
 359 /**
 360  * This function will display the name and a PIP of the provided snapshot
 361  */
 362 static void VoutOsdSnapshot( vout_thread_t *p_vout, picture_t *p_pic, const char *psz_filename )
 363 {
 364     msg_Dbg( p_vout, "snapshot taken (%s)", psz_filename );
 365     vout_OSDMessage( p_vout, VOUT_SPU_CHANNEL_OSD, "%s", psz_filename );
 366
 367     if( var_InheritBool( p_vout, "snapshot-preview" ) )
 368     {
 369         if( VoutSnapshotPip( p_vout, p_pic ) )
 370             msg_Warn( p_vout, "Failed to display snapshot" );
 371     }
 372 }
 373
 374 /**
 375  * This function will handle a snapshot request
 376  */
 377 static void VoutSaveSnapshot( vout_thread_t *p_vout )
 378 {
 379     char *psz_path = var_InheritString( p_vout, "snapshot-path" );
 380     char *psz_format = var_InheritString( p_vout, "snapshot-format" );
 381     char *psz_prefix = var_InheritString( p_vout, "snapshot-prefix" );
 382
 383     /* */
 384     picture_t *p_picture;
 385     block_t *p_image;
 386
 387     /* 500ms timeout
 388      * XXX it will cause trouble with low fps video (< 2fps) */
 389     if( vout_GetSnapshot( p_vout, &p_image, &p_picture, NULL, psz_format, 500*1000 ) )
 390     {
 391         p_picture = NULL;
 392         p_image = NULL;
 393         goto exit;
 394     }
 395
 396     if( !psz_path )
 397     {
 398         psz_path = vout_snapshot_GetDirectory();
 399         if( !psz_path )
 400         {
 401             msg_Err( p_vout, "no path specified for snapshots" );
 402             goto exit;
 403         }
 404     }
 405
 406     vout_snapshot_save_cfg_t cfg;
 407     memset( &cfg, 0, sizeof(cfg) );
 408     cfg.is_sequential = var_InheritBool( p_vout, "snapshot-sequential" );
 409     cfg.sequence = var_GetInteger( p_vout, "snapshot-num" );
 410     cfg.path = psz_path;
 411     cfg.format = psz_format;
 412     cfg.prefix_fmt = psz_prefix;
 413
 414     char *psz_filename;
 415     int  i_sequence;
 416     if (vout_snapshot_SaveImage( &psz_filename, &i_sequence,
 417                                  p_image, p_vout, &cfg ) )
 418         goto exit;
 419     if( cfg.is_sequential )
 420         var_SetInteger( p_vout, "snapshot-num", i_sequence + 1 );
 421
 422     VoutOsdSnapshot( p_vout, p_picture, psz_filename );
 423
 424     /* signal creation of a new snapshot file */
 425     var_SetString( p_vout->obj.libvlc, "snapshot-file", psz_filename );
 426
 427     free( psz_filename );
 428
 429 exit:
 430     if( p_image )
 431         block_Release( p_image );
 432     if( p_picture )
 433         picture_Release( p_picture );
 434     free( psz_prefix );
 435     free( psz_format );
 436     free( psz_path );
 437 }
 438
 439 /*****************************************************************************
 440  * Object variables callbacks
 441  *****************************************************************************/
 442 static int CropCallback( vlc_object_t *object, char const *cmd,
 443                          vlc_value_t oldval, vlc_value_t newval, void *data )
 444 {
 445     vout_thread_t *vout = (vout_thread_t *)object;
 446     VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data);
 447     unsigned num, den;
 448     unsigned y, x;
 449     unsigned width, height;
 450     unsigned left, top, right, bottom;
 451
 452     if (sscanf(newval.psz_string, "%u:%u", &num, &den) == 2) {
 453         vout_ControlChangeCropRatio(vout, num, den);
 454     } else if (sscanf(newval.psz_string, "%ux%u+%u+%u",
 455                       &width, &height, &x, &y) == 4) {
 456         vout_ControlChangeCropWindow(vout, x, y, width, height);
 457     } else if (sscanf(newval.psz_string, "%u+%u+%u+%u",
 458                     &left, &top, &right, &bottom) == 4) {
 459         vout_ControlChangeCropBorder(vout, left, top, right, bottom);
 460     } else if (*newval.psz_string == '\0') {
 461         vout_ControlChangeCropRatio(vout, 0, 0);
 462     } else {
 463         msg_Err(object, "Unknown crop format (%s)", newval.psz_string);
 464     }
 465     return VLC_SUCCESS;
 466 }
 467
 468 static int CropBorderCallback(vlc_object_t *object, char const *cmd,
 469                               vlc_value_t oldval, vlc_value_t newval, void *data)
 470 {
 471     char buf[4 * 21];
 472
 473     snprintf(buf, sizeof (buf), "%"PRIu64"+%"PRIu64"+%"PRIu64"+%"PRIu64,
 474              var_GetInteger(object, "crop-left"),
 475              var_GetInteger(object, "crop-top"),
 476              var_GetInteger(object, "crop-right"),
 477              var_GetInteger(object, "crop-bottom"));
 478     var_SetString(object, "crop", buf);
 479
 480     VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data); VLC_UNUSED(newval);
 481     return VLC_SUCCESS;
 482 }
 483
 484 static int AspectCallback( vlc_object_t *object, char const *cmd,
 485                          vlc_value_t oldval, vlc_value_t newval, void *data )
 486 {
 487     vout_thread_t *vout = (vout_thread_t *)object;
 488     VLC_UNUSED(cmd); VLC_UNUSED(oldval); VLC_UNUSED(data);
 489     unsigned num, den;
 490
 491     if (sscanf(newval.psz_string, "%u:%u", &num, &den) == 2 &&
 492         (num != 0) == (den != 0))
 493         vout_ControlChangeSampleAspectRatio(vout, num, den);
 494     else if (*newval.psz_string == '\0')
 495         vout_ControlChangeSampleAspectRatio(vout, 0, 0);
 496     return VLC_SUCCESS;
 497 }
 498
 499 static int AutoScaleCallback( vlc_object_t *obj, char const *name,
 500                               vlc_value_t prev, vlc_value_t cur, void *data )
 501 {
 502     vout_thread_t *p_vout = (vout_thread_t *)obj;
 503
 504     (void) name; (void) prev; (void) data;
 505     vout_ControlChangeDisplayFilled( p_vout, cur.b_bool );
 506     return VLC_SUCCESS;
 507 }
 508
 509 static int ZoomCallback( vlc_object_t *obj, char const *name,
 510                          vlc_value_t prev, vlc_value_t cur, void *data )
 511 {
 512     vout_thread_t *p_vout = (vout_thread_t *)obj;
 513
 514     (void) name; (void) prev; (void) data;
 515     vout_ControlChangeZoom( p_vout, 1000 * cur.f_float, 1000 );
 516     return VLC_SUCCESS;
 517 }
 518
 519 static int AboveCallback( vlc_object_t *obj, char const *name,
 520                           vlc_value_t prev, vlc_value_t cur, void *data )
 521 {
 522     vout_ControlChangeWindowState( (vout_thread_t *)obj,
 523         cur.b_bool ? VOUT_WINDOW_STATE_ABOVE : VOUT_WINDOW_STATE_NORMAL );
 524     (void) name; (void) prev; (void) data;
 525     return VLC_SUCCESS;
 526 }
 527
 528 static int WallPaperCallback( vlc_object_t *obj, char const *name,
 529                               vlc_value_t prev, vlc_value_t cur, void *data )
 530 {
 531     vout_thread_t *vout = (vout_thread_t *)obj;
 532
 533     if( cur.b_bool )
 534     {
 535         vout_ControlChangeWindowState( vout, VOUT_WINDOW_STATE_BELOW );
 536         vout_ControlChangeFullscreen( vout, true );
 537     }
 538     else
 539     {
 540         var_TriggerCallback( obj, "fullscreen" );
 541         var_TriggerCallback( obj, "video-on-top" );
 542     }
 543     (void) name; (void) prev; (void) data;
 544     return VLC_SUCCESS;
 545 }
 546
 547 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
 548                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 549 {
 550     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 551     (void)psz_cmd; (void)p_data;
 552
 553     if( oldval.b_bool != newval.b_bool )
 554         vout_ControlChangeFullscreen( p_vout, newval.b_bool );
 555     return VLC_SUCCESS;
 556 }
 557
 558 static int SnapshotCallback( vlc_object_t *p_this, char const *psz_cmd,
 559                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 560 {
 561     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 562     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 563     VLC_UNUSED(newval); VLC_UNUSED(p_data);
 564
 565     VoutSaveSnapshot( p_vout );
 566     return VLC_SUCCESS;
 567 }
 568
 569 static int VideoFilterCallback( vlc_object_t *p_this, char const *psz_cmd,
 570                                 vlc_value_t oldval, vlc_value_t newval, void *p_data)
 571 {
 572     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 573     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 574
 575     vout_ControlChangeFilters( p_vout, newval.psz_string );
 576     return VLC_SUCCESS;
 577 }
 578
 579 static int SubSourceCallback( vlc_object_t *p_this, char const *psz_cmd,
 580                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 581 {
 582     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 583     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 584
 585     vout_ControlChangeSubSources( p_vout, newval.psz_string );
 586     return VLC_SUCCESS;
 587 }
 588
 589 static int SubFilterCallback( vlc_object_t *p_this, char const *psz_cmd,
 590                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 591 {
 592     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 593     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 594
 595     vout_ControlChangeSubFilters( p_vout, newval.psz_string );
 596     return VLC_SUCCESS;
 597 }
 598
 599 static int SubMarginCallback( vlc_object_t *p_this, char const *psz_cmd,
 600                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 601 {
 602     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 603     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 604
 605     vout_ControlChangeSubMargin( p_vout, newval.i_int );
 606     return VLC_SUCCESS;
 607 }
 608
 609 static int ViewpointCallback( vlc_object_t *p_this, char const *psz_cmd,
 610                               vlc_value_t oldval, vlc_value_t newval, void *p_data)
 611 {
 612     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 613     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 614
 615     if( newval.p_address != NULL )
 616         vout_ControlChangeViewpoint( p_vout, newval.p_address );
 617     return VLC_SUCCESS;
 618 }