git.sesse.net Git - vlc/blob - src/video_output/vout_intf.c

   1 /*****************************************************************************
   2  * vout_intf.c : video output interface
   3  *****************************************************************************
   4  * Copyright (C) 2000-2007 the VideoLAN team
   5  *
   6  * Authors: Gildas Bazin <gbazin@videolan.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 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 General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, 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 <sys/types.h>                                          /* opendir() */
  36 #include <dirent.h>                                             /* opendir() */
  37 #include <assert.h>
  38 #include <time.h>                                           /* strftime */
  39
  40 #include <vlc_interface.h>
  41 #include <vlc_block.h>
  42 #include <vlc_playlist.h>
  43
  44 #include <vlc_vout.h>
  45 #include <vlc_image.h>
  46 #include <vlc_osd.h>
  47 #include <vlc_strings.h>
  48 #include <vlc_charset.h>
  49 #include "../libvlc.h"
  50 #include "vout_internal.h"
  51
  52 /*****************************************************************************
  53  * Local prototypes
  54  *****************************************************************************/
  55 /* Object variables callbacks */
  56 static int ZoomCallback( vlc_object_t *, char const *,
  57                          vlc_value_t, vlc_value_t, void * );
  58 static int CropCallback( vlc_object_t *, char const *,
  59                          vlc_value_t, vlc_value_t, void * );
  60 static int AspectCallback( vlc_object_t *, char const *,
  61                            vlc_value_t, vlc_value_t, void * );
  62 static int ScalingCallback( vlc_object_t *, char const *,
  63                             vlc_value_t, vlc_value_t, void * );
  64 static int OnTopCallback( vlc_object_t *, char const *,
  65                           vlc_value_t, vlc_value_t, void * );
  66 static int FullscreenCallback( vlc_object_t *, char const *,
  67                                vlc_value_t, vlc_value_t, void * );
  68 static int SnapshotCallback( vlc_object_t *, char const *,
  69                              vlc_value_t, vlc_value_t, void * );
  70
  71 static int TitleShowCallback( vlc_object_t *, char const *,
  72                               vlc_value_t, vlc_value_t, void * );
  73 static int TitleTimeoutCallback( vlc_object_t *, char const *,
  74                                  vlc_value_t, vlc_value_t, void * );
  75 static int TitlePositionCallback( vlc_object_t *, char const *,
  76                                   vlc_value_t, vlc_value_t, void * );
  77
  78 /*****************************************************************************
  79  * vout_IntfInit: called during the vout creation to initialise misc things.
  80  *****************************************************************************/
  81 static const struct
  82 {
  83     double f_value;
  84     const char *psz_label;
  85 } p_zoom_values[] = {
  86     { 0.25, N_("1:4 Quarter") },
  87     { 0.5, N_("1:2 Half") },
  88     { 1, N_("1:1 Original") },
  89     { 2, N_("2:1 Double") },
  90     { 0, NULL } };
  91
  92 static const struct
  93 {
  94     const char *psz_value;
  95     const char *psz_label;
  96 } p_crop_values[] = {
  97     { "", N_("Default") },
  98     { "16:10", "16:10" },
  99     { "16:9", "16:9" },
 100     { "185:100", "1.85:1" },
 101     { "221:100", "2.21:1" },
 102     { "235:100", "2.35:1" },
 103     { "239:100", "2.39:1" },
 104     { "5:3", "5:3" },
 105     { "4:3", "4:3" },
 106     { "5:4", "5:4" },
 107     { "1:1", "1:1" },
 108     { NULL, NULL } };
 109
 110 static const struct
 111 {
 112     const char *psz_value;
 113     const char *psz_label;
 114 } p_aspect_ratio_values[] = {
 115     { "", N_("Default") },
 116     { "1:1", "1:1" },
 117     { "4:3", "4:3" },
 118     { "16:9", "16:9" },
 119     { "16:10", "16:10" },
 120     { "221:100", "2.21:1" },
 121     { "235:100", "2.35:1" },
 122     { "239:100", "2.39:1" },
 123     { "5:4", "5:4" },
 124     { NULL, NULL } };
 125
 126 static void AddCustomRatios( vout_thread_t *p_vout, const char *psz_var,
 127                              char *psz_list )
 128 {
 129     assert( psz_list );
 130
 131     char *psz_cur = psz_list;
 132     char *psz_next;
 133     while( psz_cur && *psz_cur )
 134     {
 135         vlc_value_t val, text;
 136         psz_next = strchr( psz_cur, ',' );
 137         if( psz_next )
 138         {
 139             *psz_next = '\0';
 140             psz_next++;
 141         }
 142         val.psz_string = psz_cur;
 143         text.psz_string = psz_cur;
 144         var_Change( p_vout, psz_var, VLC_VAR_ADDCHOICE, &val, &text);
 145         psz_cur = psz_next;
 146     }
 147 }
 148
 149 void vout_IntfInit( vout_thread_t *p_vout )
 150 {
 151     vlc_value_t val, text, old_val;
 152     bool b_force_par = false;
 153     char *psz_buf;
 154     int i;
 155
 156     /* Create a few object variables we'll need later on */
 157     var_Create( p_vout, "snapshot-path", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 158     var_Create( p_vout, "snapshot-prefix", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 159     var_Create( p_vout, "snapshot-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 160     var_Create( p_vout, "snapshot-preview", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 161     var_Create( p_vout, "snapshot-sequential",
 162                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 163     var_Create( p_vout, "snapshot-num", VLC_VAR_INTEGER );
 164     var_SetInteger( p_vout, "snapshot-num", 1 );
 165     var_Create( p_vout, "snapshot-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 166     var_Create( p_vout, "snapshot-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 167
 168     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 169     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 170     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 171
 172     var_Create( p_vout, "video-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 173     var_Create( p_vout, "video-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 174
 175     var_Create( p_vout, "mouse-hide-timeout",
 176                 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 177
 178     p_vout->p->b_title_show = var_CreateGetBool( p_vout, "video-title-show" );
 179     p_vout->p->i_title_timeout =
 180         (mtime_t)var_CreateGetInteger( p_vout, "video-title-timeout" );
 181     p_vout->p->i_title_position =
 182         var_CreateGetInteger( p_vout, "video-title-position" );
 183     p_vout->p->psz_title =  NULL;
 184
 185     var_AddCallback( p_vout, "video-title-show", TitleShowCallback, NULL );
 186     var_AddCallback( p_vout, "video-title-timeout", TitleTimeoutCallback, NULL );
 187     var_AddCallback( p_vout, "video-title-position", TitlePositionCallback, NULL );
 188
 189     /* Zoom object var */
 190     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_ISCOMMAND |
 191                 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
 192
 193     text.psz_string = _("Zoom");
 194     var_Change( p_vout, "zoom", VLC_VAR_SETTEXT, &text, NULL );
 195
 196     var_Get( p_vout, "zoom", &old_val );
 197
 198     for( i = 0; p_zoom_values[i].f_value; i++ )
 199     {
 200         if( old_val.f_float == p_zoom_values[i].f_value )
 201             var_Change( p_vout, "zoom", VLC_VAR_DELCHOICE, &old_val, NULL );
 202         val.f_float = p_zoom_values[i].f_value;
 203         text.psz_string = _( p_zoom_values[i].psz_label );
 204         var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 205     }
 206
 207     var_Set( p_vout, "zoom", old_val ); /* Is this really needed? */
 208
 209     var_AddCallback( p_vout, "zoom", ZoomCallback, NULL );
 210
 211     /* Crop offset vars */
 212     var_Create( p_vout, "crop-left", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 213     var_Create( p_vout, "crop-top", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 214     var_Create( p_vout, "crop-right", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 215     var_Create( p_vout, "crop-bottom", VLC_VAR_INTEGER | VLC_VAR_ISCOMMAND );
 216
 217     var_AddCallback( p_vout, "crop-left", CropCallback, NULL );
 218     var_AddCallback( p_vout, "crop-top", CropCallback, NULL );
 219     var_AddCallback( p_vout, "crop-right", CropCallback, NULL );
 220     var_AddCallback( p_vout, "crop-bottom", CropCallback, NULL );
 221
 222     /* Crop object var */
 223     var_Create( p_vout, "crop", VLC_VAR_STRING | VLC_VAR_ISCOMMAND |
 224                 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
 225
 226     text.psz_string = _("Crop");
 227     var_Change( p_vout, "crop", VLC_VAR_SETTEXT, &text, NULL );
 228
 229     val.psz_string = (char*)"";
 230     var_Change( p_vout, "crop", VLC_VAR_DELCHOICE, &val, 0 );
 231
 232     for( i = 0; p_crop_values[i].psz_value; i++ )
 233     {
 234         val.psz_string = (char*)p_crop_values[i].psz_value;
 235         text.psz_string = _( p_crop_values[i].psz_label );
 236         var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 237     }
 238
 239     /* update triggered every time the vout's crop parameters are changed */
 240     var_Create( p_vout, "crop-update", VLC_VAR_VOID );
 241
 242     /* Add custom crop ratios */
 243     psz_buf = var_CreateGetNonEmptyString( p_vout, "custom-crop-ratios" );
 244     if( psz_buf )
 245     {
 246         AddCustomRatios( p_vout, "crop", psz_buf );
 247         free( psz_buf );
 248     }
 249
 250     var_AddCallback( p_vout, "crop", CropCallback, NULL );
 251     var_Get( p_vout, "crop", &old_val );
 252     if( old_val.psz_string && *old_val.psz_string )
 253         var_TriggerCallback( p_vout, "crop" );
 254     free( old_val.psz_string );
 255
 256     /* Monitor pixel aspect-ratio */
 257     var_Create( p_vout, "monitor-par", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 258     var_Get( p_vout, "monitor-par", &val );
 259     if( val.psz_string && *val.psz_string )
 260     {
 261         char *psz_parser = strchr( val.psz_string, ':' );
 262         unsigned int i_aspect_num = 0, i_aspect_den = 0;
 263         float i_aspect = 0;
 264         if( psz_parser )
 265         {
 266             i_aspect_num = strtol( val.psz_string, 0, 10 );
 267             i_aspect_den = strtol( ++psz_parser, 0, 10 );
 268         }
 269         else
 270         {
 271             i_aspect = us_atof( val.psz_string );
 272             vlc_ureduce( &i_aspect_num, &i_aspect_den,
 273                          i_aspect *VOUT_ASPECT_FACTOR, VOUT_ASPECT_FACTOR, 0 );
 274         }
 275         if( !i_aspect_num || !i_aspect_den ) i_aspect_num = i_aspect_den = 1;
 276
 277         p_vout->p->i_par_num = i_aspect_num;
 278         p_vout->p->i_par_den = i_aspect_den;
 279
 280         vlc_ureduce( &p_vout->p->i_par_num, &p_vout->p->i_par_den,
 281                      p_vout->p->i_par_num, p_vout->p->i_par_den, 0 );
 282
 283         msg_Dbg( p_vout, "overriding monitor pixel aspect-ratio: %i:%i",
 284                  p_vout->p->i_par_num, p_vout->p->i_par_den );
 285         b_force_par = true;
 286     }
 287     free( val.psz_string );
 288
 289     /* Aspect-ratio object var */
 290     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_ISCOMMAND |
 291                 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
 292
 293     text.psz_string = _("Aspect-ratio");
 294     var_Change( p_vout, "aspect-ratio", VLC_VAR_SETTEXT, &text, NULL );
 295
 296     val.psz_string = (char*)"";
 297     var_Change( p_vout, "aspect-ratio", VLC_VAR_DELCHOICE, &val, 0 );
 298
 299     for( i = 0; p_aspect_ratio_values[i].psz_value; i++ )
 300     {
 301         val.psz_string = (char*)p_aspect_ratio_values[i].psz_value;
 302         text.psz_string = _( p_aspect_ratio_values[i].psz_label );
 303         var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 304     }
 305
 306     /* Add custom aspect ratios */
 307     psz_buf = var_CreateGetNonEmptyString( p_vout, "custom-aspect-ratios" );
 308     if( psz_buf )
 309     {
 310         AddCustomRatios( p_vout, "aspect-ratio", psz_buf );
 311         free( psz_buf );
 312     }
 313
 314     var_AddCallback( p_vout, "aspect-ratio", AspectCallback, NULL );
 315     var_Get( p_vout, "aspect-ratio", &old_val );
 316     if( (old_val.psz_string && *old_val.psz_string) || b_force_par )
 317         var_TriggerCallback( p_vout, "aspect-ratio" );
 318     free( old_val.psz_string );
 319
 320     /* Add variables to manage scaling video */
 321     var_Create( p_vout, "autoscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT
 322                 | VLC_VAR_ISCOMMAND );
 323     text.psz_string = _("Autoscale video");
 324     var_Change( p_vout, "autoscale", VLC_VAR_SETTEXT, &text, NULL );
 325     var_AddCallback( p_vout, "autoscale", ScalingCallback, NULL );
 326
 327     var_Create( p_vout, "scale", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT
 328                 | VLC_VAR_ISCOMMAND );
 329     text.psz_string = _("Scale factor");
 330     var_Change( p_vout, "scale", VLC_VAR_SETTEXT, &text, NULL );
 331     var_AddCallback( p_vout, "scale", ScalingCallback, NULL );
 332
 333     /* Add a variable to indicate if the window should be on top of others */
 334     var_Create( p_vout, "video-on-top", VLC_VAR_BOOL | VLC_VAR_DOINHERIT
 335                 | VLC_VAR_ISCOMMAND );
 336     text.psz_string = _("Always on top");
 337     var_Change( p_vout, "video-on-top", VLC_VAR_SETTEXT, &text, NULL );
 338     var_AddCallback( p_vout, "video-on-top", OnTopCallback, NULL );
 339
 340     /* Add a variable to indicate whether we want window decoration or not */
 341     var_Create( p_vout, "video-deco", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 342
 343     /* Add a fullscreen variable */
 344     if( var_CreateGetBoolCommand( p_vout, "fullscreen" ) )
 345     {
 346         /* user requested fullscreen */
 347         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 348     }
 349     text.psz_string = _("Fullscreen");
 350     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 351     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 352
 353     /* Add a snapshot variable */
 354     var_Create( p_vout, "video-snapshot", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
 355     text.psz_string = _("Snapshot");
 356     var_Change( p_vout, "video-snapshot", VLC_VAR_SETTEXT, &text, NULL );
 357     var_AddCallback( p_vout, "video-snapshot", SnapshotCallback, NULL );
 358
 359     /* Mouse coordinates */
 360     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 361     var_Create( p_vout, "mouse-moved", VLC_VAR_COORDS );
 362     var_Create( p_vout, "mouse-clicked", VLC_VAR_COORDS );
 363     var_Create( p_vout, "mouse-object", VLC_VAR_BOOL );
 364
 365     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 366     var_SetBool( p_vout, "intf-change", true );
 367 }
 368
 369 /*****************************************************************************
 370  * vout_Snapshot: generates a snapshot.
 371  *****************************************************************************/
 372 /**
 373  * This function will inject a subpicture into the vout with the provided
 374  * picture
 375  */
 376 static int VoutSnapshotPip( vout_thread_t *p_vout, picture_t *p_pic )
 377 {
 378     subpicture_t *p_subpic = subpicture_NewFromPicture( VLC_OBJECT(p_vout),
 379                                                         p_pic, VLC_CODEC_YUVA );
 380     if( !p_subpic )
 381         return VLC_EGENERIC;
 382
 383     /* FIXME DEFAULT_CHAN is not good (used by the text) but
 384      * hardcoded 0 doesn't seem right */
 385     p_subpic->i_channel = 0;
 386     p_subpic->i_start = mdate();
 387     p_subpic->i_stop  = p_subpic->i_start + 4000000;
 388     p_subpic->b_ephemer = true;
 389     p_subpic->b_fade = true;
 390
 391     /* Reduce the picture to 1/4^2 of the screen */
 392     p_subpic->i_original_picture_width  *= 4;
 393     p_subpic->i_original_picture_height *= 4;
 394
 395     spu_DisplaySubpicture( vout_GetSpu( p_vout ), p_subpic );
 396     return VLC_SUCCESS;
 397 }
 398
 399 /**
 400  * This function will display the name and a PIP of the provided snapshot
 401  */
 402 static void VoutOsdSnapshot( vout_thread_t *p_vout, picture_t *p_pic, const char *psz_filename )
 403 {
 404     msg_Dbg( p_vout, "snapshot taken (%s)", psz_filename );
 405     vout_OSDMessage( VLC_OBJECT( p_vout ), DEFAULT_CHAN, "%s", psz_filename );
 406
 407     if( var_GetBool( p_vout, "snapshot-preview" ) )
 408     {
 409         if( VoutSnapshotPip( p_vout, p_pic ) )
 410             msg_Warn( p_vout, "Failed to display snapshot" );
 411     }
 412 }
 413
 414 /* */
 415 int vout_GetSnapshot( vout_thread_t *p_vout,
 416                       block_t **pp_image, picture_t **pp_picture,
 417                       video_format_t *p_fmt,
 418                       const char *psz_format, mtime_t i_timeout )
 419 {
 420     picture_t *p_picture = vout_snapshot_Get( &p_vout->p->snapshot, i_timeout );
 421     if( !p_picture )
 422     {
 423         msg_Err( p_vout, "Failed to grab a snapshot" );
 424         return VLC_EGENERIC;
 425     }
 426
 427     if( pp_image )
 428     {
 429         vlc_fourcc_t i_format = VLC_CODEC_PNG;
 430         if( psz_format && image_Type2Fourcc( psz_format ) )
 431             i_format = image_Type2Fourcc( psz_format );
 432
 433         const int i_override_width  = var_GetInteger( p_vout, "snapshot-width" );
 434         const int i_override_height = var_GetInteger( p_vout, "snapshot-height" );
 435
 436         if( picture_Export( VLC_OBJECT(p_vout), pp_image, p_fmt,
 437                             p_picture, i_format, i_override_width, i_override_height ) )
 438         {
 439             msg_Err( p_vout, "Failed to convert image for snapshot" );
 440             picture_Release( p_picture );
 441             return VLC_EGENERIC;
 442         }
 443     }
 444     if( pp_picture )
 445         *pp_picture = p_picture;
 446     else
 447         picture_Release( p_picture );
 448     return VLC_SUCCESS;
 449 }
 450
 451 /**
 452  * This function will handle a snapshot request
 453  */
 454 static void VoutSaveSnapshot( vout_thread_t *p_vout )
 455 {
 456     char *psz_path = var_GetNonEmptyString( p_vout, "snapshot-path" );
 457     char *psz_format = var_GetNonEmptyString( p_vout, "snapshot-format" );
 458     char *psz_prefix = var_GetNonEmptyString( p_vout, "snapshot-prefix" );
 459
 460     /* */
 461     picture_t *p_picture;
 462     block_t *p_image;
 463     video_format_t fmt;
 464
 465     /* 500ms timeout
 466      * XXX it will cause trouble with low fps video (< 2fps) */
 467     if( vout_GetSnapshot( p_vout, &p_image, &p_picture, &fmt, psz_format, 500*1000 ) )
 468     {
 469         p_picture = NULL;
 470         p_image = NULL;
 471         goto exit;
 472     }
 473
 474     if( !psz_path )
 475     {
 476         psz_path = vout_snapshot_GetDirectory();
 477         if( !psz_path )
 478         {
 479             msg_Err( p_vout, "no path specified for snapshots" );
 480             goto exit;
 481         }
 482     }
 483
 484     vout_snapshot_save_cfg_t cfg;
 485     memset( &cfg, 0, sizeof(cfg) );
 486     cfg.is_sequential = var_GetBool( p_vout, "snapshot-sequential" );
 487     cfg.sequence = var_GetInteger( p_vout, "snapshot-num" );
 488     cfg.path = psz_path;
 489     cfg.format = psz_format;
 490     cfg.prefix_fmt = psz_prefix;
 491
 492     char *psz_filename;
 493     int  i_sequence;
 494     if (vout_snapshot_SaveImage( &psz_filename, &i_sequence,
 495                                  p_image, VLC_OBJECT(p_vout), &cfg ) )
 496         goto exit;
 497     if( cfg.is_sequential )
 498         var_SetInteger( p_vout, "snapshot-num", i_sequence + 1 );
 499
 500     VoutOsdSnapshot( p_vout, p_picture, psz_filename );
 501
 502     /* signal creation of a new snapshot file */
 503     var_SetString( p_vout->p_libvlc, "snapshot-file", psz_filename );
 504
 505     free( psz_filename );
 506
 507 exit:
 508     if( p_image )
 509         block_Release( p_image );
 510     if( p_picture )
 511         picture_Release( p_picture );
 512     free( psz_prefix );
 513     free( psz_format );
 514     free( psz_path );
 515 }
 516
 517 /*****************************************************************************
 518  * Handle filters
 519  *****************************************************************************/
 520
 521 void vout_EnableFilter( vout_thread_t *p_vout, const char *psz_name,
 522                         bool b_add, bool b_setconfig )
 523 {
 524     char *psz_parser;
 525     char *psz_string;
 526     const char *psz_filter_type;
 527
 528     /* FIXME temporary hack */
 529     const char *psz_module_name = psz_name;
 530     if( !strcmp( psz_name, "magnify" ) ||
 531         !strcmp( psz_name, "puzzle" ) ||
 532         !strcmp( psz_name, "logo" ) ||
 533         !strcmp( psz_name, "wall" ) ||
 534         !strcmp( psz_name, "clone" ) )
 535         psz_module_name = "video_filter_wrapper";
 536
 537     module_t *p_obj = module_find( psz_module_name );
 538     if( !p_obj )
 539     {
 540         msg_Err( p_vout, "Unable to find filter module \"%s\".", psz_name );
 541         return;
 542     }
 543
 544     if( module_provides( p_obj, "video filter" ) )
 545     {
 546         psz_filter_type = "vout-filter";
 547     }
 548     else if( module_provides( p_obj, "video filter2" ) )
 549     {
 550         psz_filter_type = "video-filter";
 551     }
 552     else if( module_provides( p_obj, "sub filter" ) )
 553     {
 554         psz_filter_type = "sub-filter";
 555     }
 556     else
 557     {
 558         module_release( p_obj );
 559         msg_Err( p_vout, "Unknown video filter type." );
 560         return;
 561     }
 562     module_release( p_obj );
 563
 564     if( !strcmp( psz_filter_type, "sub-filter") )
 565         psz_string = var_GetString( vout_GetSpu( p_vout ), psz_filter_type );
 566     else
 567         psz_string = var_GetString( p_vout, psz_filter_type );
 568
 569     /* Todo : Use some generic chain manipulation functions */
 570     if( !psz_string ) psz_string = strdup("");
 571
 572     psz_parser = strstr( psz_string, psz_name );
 573     if( b_add )
 574     {
 575         if( !psz_parser )
 576         {
 577             psz_parser = psz_string;
 578             if( asprintf( &psz_string, (*psz_string) ? "%s:%s" : "%s%s",
 579                           psz_string, psz_name ) == -1 )
 580             {
 581                 free( psz_parser );
 582                 return;
 583             }
 584             free( psz_parser );
 585         }
 586         else
 587             return;
 588     }
 589     else
 590     {
 591         if( psz_parser )
 592         {
 593             memmove( psz_parser, psz_parser + strlen(psz_name) +
 594                             (*(psz_parser + strlen(psz_name)) == ':' ? 1 : 0 ),
 595                             strlen(psz_parser + strlen(psz_name)) + 1 );
 596
 597             /* Remove trailing : : */
 598             if( *(psz_string+strlen(psz_string ) -1 ) == ':' )
 599             {
 600                 *(psz_string+strlen(psz_string ) -1 ) = '\0';
 601             }
 602          }
 603          else
 604          {
 605              free( psz_string );
 606              return;
 607          }
 608     }
 609
 610     if( b_setconfig )
 611     {
 612         if( !strcmp( psz_filter_type, "sub-filter") )
 613             config_PutPsz( vout_GetSpu( p_vout ), psz_filter_type, psz_string );
 614         else
 615             config_PutPsz( p_vout, psz_filter_type, psz_string );
 616     }
 617
 618     if( !strcmp( psz_filter_type, "sub-filter") )
 619         var_SetString( vout_GetSpu( p_vout ), psz_filter_type, psz_string );
 620     else
 621         var_SetString( p_vout, psz_filter_type, psz_string );
 622
 623     free( psz_string );
 624 }
 625
 626 /*****************************************************************************
 627  * Object variables callbacks
 628  *****************************************************************************/
 629 static int ZoomCallback( vlc_object_t *p_this, char const *psz_cmd,
 630                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 631 {
 632     (void)psz_cmd; (void)oldval; (void)p_data;
 633
 634     return var_SetFloat( p_this, "scale", newval.f_float );
 635 }
 636
 637 static int CropCallback( vlc_object_t *p_this, char const *psz_cmd,
 638                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 639 {
 640     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 641     int64_t i_aspect_num, i_aspect_den;
 642     unsigned int i_width, i_height;
 643
 644     (void)oldval; (void)p_data;
 645
 646     /* Restore defaults */
 647     p_vout->fmt_in.i_x_offset = p_vout->fmt_render.i_x_offset;
 648     p_vout->fmt_in.i_visible_width = p_vout->fmt_render.i_visible_width;
 649     p_vout->fmt_in.i_y_offset = p_vout->fmt_render.i_y_offset;
 650     p_vout->fmt_in.i_visible_height = p_vout->fmt_render.i_visible_height;
 651
 652     if( !strcmp( psz_cmd, "crop" ) )
 653     {
 654         char *psz_end = NULL, *psz_parser = strchr( newval.psz_string, ':' );
 655         if( psz_parser )
 656         {
 657             /* We're using the 3:4 syntax */
 658             i_aspect_num = strtol( newval.psz_string, &psz_end, 10 );
 659             if( psz_end == newval.psz_string || !i_aspect_num ) goto crop_end;
 660
 661             i_aspect_den = strtol( ++psz_parser, &psz_end, 10 );
 662             if( psz_end == psz_parser || !i_aspect_den ) goto crop_end;
 663
 664             i_width = p_vout->fmt_in.i_sar_den*p_vout->fmt_render.i_visible_height *
 665                 i_aspect_num / i_aspect_den / p_vout->fmt_in.i_sar_num;
 666             i_height = p_vout->fmt_render.i_visible_width*p_vout->fmt_in.i_sar_num *
 667                 i_aspect_den / i_aspect_num / p_vout->fmt_in.i_sar_den;
 668
 669             if( i_width < p_vout->fmt_render.i_visible_width )
 670             {
 671                 p_vout->fmt_in.i_x_offset = p_vout->fmt_render.i_x_offset +
 672                     (p_vout->fmt_render.i_visible_width - i_width) / 2;
 673                 p_vout->fmt_in.i_visible_width = i_width;
 674             }
 675             else
 676             {
 677                 p_vout->fmt_in.i_y_offset = p_vout->fmt_render.i_y_offset +
 678                     (p_vout->fmt_render.i_visible_height - i_height) / 2;
 679                 p_vout->fmt_in.i_visible_height = i_height;
 680             }
 681         }
 682         else
 683         {
 684             psz_parser = strchr( newval.psz_string, 'x' );
 685             if( psz_parser )
 686             {
 687                 /* Maybe we're using the <width>x<height>+<left>+<top> syntax */
 688                 unsigned int i_crop_width, i_crop_height, i_crop_top, i_crop_left;
 689
 690                 i_crop_width = strtol( newval.psz_string, &psz_end, 10 );
 691                 if( psz_end != psz_parser ) goto crop_end;
 692
 693                 psz_parser = strchr( ++psz_end, '+' );
 694                 i_crop_height = strtol( psz_end, &psz_end, 10 );
 695                 if( psz_end != psz_parser ) goto crop_end;
 696
 697                 psz_parser = strchr( ++psz_end, '+' );
 698                 i_crop_left = strtol( psz_end, &psz_end, 10 );
 699                 if( psz_end != psz_parser ) goto crop_end;
 700
 701                 psz_end++;
 702                 i_crop_top = strtol( psz_end, &psz_end, 10 );
 703                 if( *psz_end != '\0' ) goto crop_end;
 704
 705                 if( i_crop_top + i_crop_height >= p_vout->fmt_render.i_visible_height ||
 706                     i_crop_left + i_crop_width >= p_vout->fmt_render.i_visible_width )
 707                 {
 708                     msg_Err( p_vout, "Unable to crop over picture boundaries");
 709                     return VLC_EGENERIC;
 710                 }
 711
 712                 i_width = i_crop_width;
 713                 p_vout->fmt_in.i_visible_width = i_width;
 714
 715                 i_height = i_crop_height;
 716                 p_vout->fmt_in.i_visible_height = i_height;
 717
 718                 p_vout->fmt_in.i_x_offset = i_crop_left;
 719                 p_vout->fmt_in.i_y_offset = i_crop_top;
 720             }
 721             else
 722             {
 723                 /* Maybe we're using the <left>+<top>+<right>+<bottom> syntax */
 724                 unsigned int i_crop_top, i_crop_left, i_crop_bottom, i_crop_right;
 725
 726                 psz_parser = strchr( newval.psz_string, '+' );
 727                 i_crop_left = strtol( newval.psz_string, &psz_end, 10 );
 728                 if( psz_end != psz_parser ) goto crop_end;
 729
 730                 psz_parser = strchr( ++psz_end, '+' );
 731                 i_crop_top = strtol( psz_end, &psz_end, 10 );
 732                 if( psz_end != psz_parser ) goto crop_end;
 733
 734                 psz_parser = strchr( ++psz_end, '+' );
 735                 i_crop_right = strtol( psz_end, &psz_end, 10 );
 736                 if( psz_end != psz_parser ) goto crop_end;
 737
 738                 psz_end++;
 739                 i_crop_bottom = strtol( psz_end, &psz_end, 10 );
 740                 if( *psz_end != '\0' ) goto crop_end;
 741
 742                 if( i_crop_top + i_crop_bottom >= p_vout->fmt_render.i_visible_height ||
 743                     i_crop_right + i_crop_left >= p_vout->fmt_render.i_visible_width )
 744                 {
 745                     msg_Err( p_vout, "Unable to crop over picture boundaries" );
 746                     return VLC_EGENERIC;
 747                 }
 748
 749                 i_width = p_vout->fmt_render.i_visible_width
 750                           - i_crop_left - i_crop_right;
 751                 p_vout->fmt_in.i_visible_width = i_width;
 752
 753                 i_height = p_vout->fmt_render.i_visible_height
 754                            - i_crop_top - i_crop_bottom;
 755                 p_vout->fmt_in.i_visible_height = i_height;
 756
 757                 p_vout->fmt_in.i_x_offset = i_crop_left;
 758                 p_vout->fmt_in.i_y_offset = i_crop_top;
 759             }
 760         }
 761     }
 762     else if( !strcmp( psz_cmd, "crop-top" )
 763           || !strcmp( psz_cmd, "crop-left" )
 764           || !strcmp( psz_cmd, "crop-bottom" )
 765           || !strcmp( psz_cmd, "crop-right" ) )
 766     {
 767         unsigned int i_crop_top, i_crop_left, i_crop_bottom, i_crop_right;
 768
 769         i_crop_top = var_GetInteger( p_vout, "crop-top" );
 770         i_crop_left = var_GetInteger( p_vout, "crop-left" );
 771         i_crop_right = var_GetInteger( p_vout, "crop-right" );
 772         i_crop_bottom = var_GetInteger( p_vout, "crop-bottom" );
 773
 774         if( i_crop_top + i_crop_bottom >= p_vout->fmt_render.i_visible_height ||
 775             i_crop_right + i_crop_left >= p_vout->fmt_render.i_visible_width )
 776         {
 777             msg_Err( p_vout, "Unable to crop over picture boundaries" );
 778             return VLC_EGENERIC;
 779         }
 780
 781         i_width = p_vout->fmt_render.i_visible_width
 782                   - i_crop_left - i_crop_right;
 783         p_vout->fmt_in.i_visible_width = i_width;
 784
 785         i_height = p_vout->fmt_render.i_visible_height
 786                    - i_crop_top - i_crop_bottom;
 787         p_vout->fmt_in.i_visible_height = i_height;
 788
 789         p_vout->fmt_in.i_x_offset = i_crop_left;
 790         p_vout->fmt_in.i_y_offset = i_crop_top;
 791     }
 792
 793  crop_end:
 794     p_vout->i_changes |= VOUT_CROP_CHANGE;
 795
 796     msg_Dbg( p_vout, "cropping picture %ix%i to %i,%i,%ix%i",
 797              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 798              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 799              p_vout->fmt_in.i_visible_width,
 800              p_vout->fmt_in.i_visible_height );
 801
 802     var_TriggerCallback( p_vout, "crop-update" );
 803
 804     return VLC_SUCCESS;
 805 }
 806
 807 static int AspectCallback( vlc_object_t *p_this, char const *psz_cmd,
 808                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 809 {
 810     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 811     unsigned int i_aspect_num, i_aspect_den, i_sar_num, i_sar_den;
 812     vlc_value_t val;
 813
 814     char *psz_end, *psz_parser = strchr( newval.psz_string, ':' );
 815     (void)psz_cmd; (void)oldval; (void)p_data;
 816
 817     /* Restore defaults */
 818     p_vout->fmt_in.i_sar_num = p_vout->fmt_render.i_sar_num;
 819     p_vout->fmt_in.i_sar_den = p_vout->fmt_render.i_sar_den;
 820     p_vout->render.i_aspect = (int64_t)p_vout->fmt_render.i_sar_num *
 821                                        p_vout->fmt_render.i_width *
 822                                        VOUT_ASPECT_FACTOR /
 823                                        p_vout->fmt_render.i_sar_den / p_vout->fmt_render.i_height;
 824
 825     if( !psz_parser ) goto aspect_end;
 826
 827     i_aspect_num = strtol( newval.psz_string, &psz_end, 10 );
 828     if( psz_end == newval.psz_string || !i_aspect_num ) goto aspect_end;
 829
 830     i_aspect_den = strtol( ++psz_parser, &psz_end, 10 );
 831     if( psz_end == psz_parser || !i_aspect_den ) goto aspect_end;
 832
 833     i_sar_num = i_aspect_num * p_vout->fmt_render.i_visible_height;
 834     i_sar_den = i_aspect_den * p_vout->fmt_render.i_visible_width;
 835     vlc_ureduce( &i_sar_num, &i_sar_den, i_sar_num, i_sar_den, 0 );
 836     p_vout->fmt_in.i_sar_num = i_sar_num;
 837     p_vout->fmt_in.i_sar_den = i_sar_den;
 838     p_vout->render.i_aspect = i_aspect_num * VOUT_ASPECT_FACTOR / i_aspect_den;
 839
 840  aspect_end:
 841     if( p_vout->p->i_par_num && p_vout->p->i_par_den )
 842     {
 843         p_vout->fmt_in.i_sar_num *= p_vout->p->i_par_den;
 844         p_vout->fmt_in.i_sar_den *= p_vout->p->i_par_num;
 845         p_vout->render.i_aspect = (int64_t)p_vout->fmt_in.i_sar_num *
 846                                            p_vout->fmt_in.i_width *
 847                                            VOUT_ASPECT_FACTOR /
 848                                            p_vout->fmt_in.i_sar_den /
 849                                            p_vout->fmt_in.i_height;
 850     }
 851
 852     p_vout->i_changes |= VOUT_ASPECT_CHANGE;
 853
 854     msg_Dbg( p_vout, "new aspect-ratio %i:%i, sample aspect-ratio %i:%i",
 855              p_vout->fmt_in.i_sar_num * p_vout->fmt_in.i_width,
 856              p_vout->fmt_in.i_sar_den * p_vout->fmt_in.i_height,
 857              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 858
 859     if( var_Get( p_vout, "crop", &val ) )
 860         return VLC_EGENERIC;
 861
 862     int i_ret = CropCallback( p_this, "crop", val, val, 0 );
 863     free( val.psz_string );
 864     return i_ret;
 865 }
 866
 867 static int ScalingCallback( vlc_object_t *p_this, char const *psz_cmd,
 868                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 869 {
 870     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 871     (void)oldval; (void)newval; (void)p_data;
 872
 873     vlc_mutex_lock( &p_vout->change_lock );
 874
 875     if( !strcmp( psz_cmd, "autoscale" ) )
 876     {
 877         p_vout->i_changes |= VOUT_SCALE_CHANGE;
 878     }
 879     else if( !strcmp( psz_cmd, "scale" ) )
 880     {
 881         p_vout->i_changes |= VOUT_ZOOM_CHANGE;
 882     }
 883
 884     vlc_mutex_unlock( &p_vout->change_lock );
 885
 886     return VLC_SUCCESS;
 887 }
 888
 889 static int OnTopCallback( vlc_object_t *p_this, char const *psz_cmd,
 890                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 891 {
 892     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 893
 894     vlc_mutex_lock( &p_vout->change_lock );
 895     p_vout->i_changes |= VOUT_ON_TOP_CHANGE;
 896     p_vout->b_on_top = newval.b_bool;
 897     vlc_mutex_unlock( &p_vout->change_lock );
 898
 899     (void)psz_cmd; (void)oldval; (void)p_data;
 900     return VLC_SUCCESS;
 901 }
 902
 903 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
 904                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 905 {
 906     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 907     vlc_value_t val;
 908     (void)psz_cmd; (void)p_data;
 909
 910     if( oldval.b_bool == newval.b_bool )
 911         return VLC_SUCCESS; /* no-op */
 912     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 913
 914     val.b_bool = true;
 915     var_Set( p_vout, "intf-change", val );
 916     return VLC_SUCCESS;
 917 }
 918
 919 static int SnapshotCallback( vlc_object_t *p_this, char const *psz_cmd,
 920                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 921 {
 922     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 923     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 924     VLC_UNUSED(newval); VLC_UNUSED(p_data);
 925
 926     VoutSaveSnapshot( p_vout );
 927     return VLC_SUCCESS;
 928 }
 929
 930 static int TitleShowCallback( vlc_object_t *p_this, char const *psz_cmd,
 931                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 932 {
 933     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 934     VLC_UNUSED(p_data);
 935     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 936     p_vout->p->b_title_show = newval.b_bool;
 937     return VLC_SUCCESS;
 938 }
 939
 940 static int TitleTimeoutCallback( vlc_object_t *p_this, char const *psz_cmd,
 941                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 942 {
 943     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
 944     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 945     p_vout->p->i_title_timeout = (mtime_t) newval.i_int;
 946     return VLC_SUCCESS;
 947 }
 948
 949 static int TitlePositionCallback( vlc_object_t *p_this, char const *psz_cmd,
 950                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 951 {
 952     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 953     VLC_UNUSED(p_data);
 954     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 955     p_vout->p->i_title_position = newval.i_int;
 956     return VLC_SUCCESS;
 957 }