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 static void InitWindowSize( vout_thread_t *, unsigned *, unsigned * );
  56
  57 /* Object variables callbacks */
  58 static int ZoomCallback( vlc_object_t *, char const *,
  59                          vlc_value_t, vlc_value_t, void * );
  60 static int CropCallback( vlc_object_t *, char const *,
  61                          vlc_value_t, vlc_value_t, void * );
  62 static int AspectCallback( vlc_object_t *, char const *,
  63                            vlc_value_t, vlc_value_t, void * );
  64 static int ScalingCallback( vlc_object_t *, char const *,
  65                             vlc_value_t, vlc_value_t, void * );
  66 static int OnTopCallback( vlc_object_t *, char const *,
  67                           vlc_value_t, vlc_value_t, void * );
  68 static int FullscreenCallback( vlc_object_t *, char const *,
  69                                vlc_value_t, vlc_value_t, void * );
  70 static int SnapshotCallback( vlc_object_t *, char const *,
  71                              vlc_value_t, vlc_value_t, void * );
  72
  73 static int TitleShowCallback( vlc_object_t *, char const *,
  74                               vlc_value_t, vlc_value_t, void * );
  75 static int TitleTimeoutCallback( vlc_object_t *, char const *,
  76                                  vlc_value_t, vlc_value_t, void * );
  77 static int TitlePositionCallback( vlc_object_t *, char const *,
  78                                   vlc_value_t, vlc_value_t, void * );
  79
  80 /*****************************************************************************
  81  * vout_IntfInit: called during the vout creation to initialise misc things.
  82  *****************************************************************************/
  83 static const struct
  84 {
  85     double f_value;
  86     const char *psz_label;
  87 } p_zoom_values[] = {
  88     { 0.25, N_("1:4 Quarter") },
  89     { 0.5, N_("1:2 Half") },
  90     { 1, N_("1:1 Original") },
  91     { 2, N_("2:1 Double") },
  92     { 0, NULL } };
  93
  94 static const struct
  95 {
  96     const char *psz_value;
  97     const char *psz_label;
  98 } p_crop_values[] = {
  99     { "", N_("Default") },
 100     { "16:10", "16:10" },
 101     { "16:9", "16:9" },
 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     { "4:3", "4:3" },
 108     { "5:4", "5:4" },
 109     { "1:1", "1:1" },
 110     { NULL, NULL } };
 111
 112 static const struct
 113 {
 114     const char *psz_value;
 115     const char *psz_label;
 116 } p_aspect_ratio_values[] = {
 117     { "", N_("Default") },
 118     { "1:1", "1:1" },
 119     { "4:3", "4:3" },
 120     { "16:9", "16:9" },
 121     { "16:10", "16:10" },
 122     { "221:100", "2.21:1" },
 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     p_vout->i_alignment = var_CreateGetInteger( p_vout, "align" );
 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     p_vout->b_autoscale = var_GetBool( p_vout, "autoscale" );
 327
 328     var_Create( p_vout, "scale", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT
 329                 | VLC_VAR_ISCOMMAND );
 330     text.psz_string = _("Scale factor");
 331     var_Change( p_vout, "scale", VLC_VAR_SETTEXT, &text, NULL );
 332     var_AddCallback( p_vout, "scale", ScalingCallback, NULL );
 333     p_vout->i_zoom = (int)( ZOOM_FP_FACTOR * var_GetFloat( p_vout, "scale" ) );
 334
 335     /* Initialize the dimensions of the video window */
 336     InitWindowSize( p_vout, &p_vout->i_window_width,
 337                     &p_vout->i_window_height );
 338
 339     /* Add a variable to indicate if the window should be on top of others */
 340     var_Create( p_vout, "video-on-top", VLC_VAR_BOOL | VLC_VAR_DOINHERIT
 341                 | VLC_VAR_ISCOMMAND );
 342     text.psz_string = _("Always on top");
 343     var_Change( p_vout, "video-on-top", VLC_VAR_SETTEXT, &text, NULL );
 344     var_AddCallback( p_vout, "video-on-top", OnTopCallback, NULL );
 345
 346     /* Add a variable to indicate whether we want window decoration or not */
 347     var_Create( p_vout, "video-deco", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 348
 349     /* Add a fullscreen variable */
 350     if( var_CreateGetBoolCommand( p_vout, "fullscreen" ) )
 351     {
 352         /* user requested fullscreen */
 353         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 354     }
 355     text.psz_string = _("Fullscreen");
 356     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 357     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 358
 359     /* Add a snapshot variable */
 360     var_Create( p_vout, "video-snapshot", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
 361     text.psz_string = _("Snapshot");
 362     var_Change( p_vout, "video-snapshot", VLC_VAR_SETTEXT, &text, NULL );
 363     var_AddCallback( p_vout, "video-snapshot", SnapshotCallback, NULL );
 364
 365     /* Mouse coordinates */
 366     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 367     var_Create( p_vout, "mouse-moved", VLC_VAR_COORDS );
 368     var_Create( p_vout, "mouse-clicked", VLC_VAR_COORDS );
 369     var_Create( p_vout, "mouse-object", VLC_VAR_BOOL );
 370
 371     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 372     var_SetBool( p_vout, "intf-change", true );
 373 }
 374
 375 /*****************************************************************************
 376  * vout_Snapshot: generates a snapshot.
 377  *****************************************************************************/
 378 /**
 379  * This function will inject a subpicture into the vout with the provided
 380  * picture
 381  */
 382 static int VoutSnapshotPip( vout_thread_t *p_vout, picture_t *p_pic )
 383 {
 384     subpicture_t *p_subpic = subpicture_NewFromPicture( VLC_OBJECT(p_vout),
 385                                                         p_pic, VLC_CODEC_YUVA );
 386     if( !p_subpic )
 387         return VLC_EGENERIC;
 388
 389     /* FIXME DEFAULT_CHAN is not good (used by the text) but
 390      * hardcoded 0 doesn't seem right */
 391     p_subpic->i_channel = 0;
 392     p_subpic->i_start = mdate();
 393     p_subpic->i_stop  = p_subpic->i_start + 4000000;
 394     p_subpic->b_ephemer = true;
 395     p_subpic->b_fade = true;
 396
 397     /* Reduce the picture to 1/4^2 of the screen */
 398     p_subpic->i_original_picture_width  *= 4;
 399     p_subpic->i_original_picture_height *= 4;
 400
 401     spu_DisplaySubpicture( p_vout->p_spu, p_subpic );
 402     return VLC_SUCCESS;
 403 }
 404
 405 /**
 406  * This function will display the name and a PIP of the provided snapshot
 407  */
 408 static void VoutOsdSnapshot( vout_thread_t *p_vout, picture_t *p_pic, const char *psz_filename )
 409 {
 410     msg_Dbg( p_vout, "snapshot taken (%s)", psz_filename );
 411     vout_OSDMessage( VLC_OBJECT( p_vout ), DEFAULT_CHAN, "%s", psz_filename );
 412
 413     if( var_GetBool( p_vout, "snapshot-preview" ) )
 414     {
 415         if( VoutSnapshotPip( p_vout, p_pic ) )
 416             msg_Warn( p_vout, "Failed to display snapshot" );
 417     }
 418 }
 419
 420 /* */
 421 int vout_GetSnapshot( vout_thread_t *p_vout,
 422                       block_t **pp_image, picture_t **pp_picture,
 423                       video_format_t *p_fmt,
 424                       const char *psz_format, mtime_t i_timeout )
 425 {
 426     picture_t *p_picture = vout_snapshot_Get( &p_vout->p->snapshot, i_timeout );
 427     if( !p_picture )
 428     {
 429         msg_Err( p_vout, "Failed to grab a snapshot" );
 430         return VLC_EGENERIC;
 431     }
 432
 433     if( pp_image )
 434     {
 435         vlc_fourcc_t i_format = VLC_CODEC_PNG;
 436         if( psz_format && image_Type2Fourcc( psz_format ) )
 437             i_format = image_Type2Fourcc( psz_format );
 438
 439         const int i_override_width  = var_GetInteger( p_vout, "snapshot-width" );
 440         const int i_override_height = var_GetInteger( p_vout, "snapshot-height" );
 441
 442         if( picture_Export( VLC_OBJECT(p_vout), pp_image, p_fmt,
 443                             p_picture, i_format, i_override_width, i_override_height ) )
 444         {
 445             msg_Err( p_vout, "Failed to convert image for snapshot" );
 446             picture_Release( p_picture );
 447             return VLC_EGENERIC;
 448         }
 449     }
 450     if( pp_picture )
 451         *pp_picture = p_picture;
 452     else
 453         picture_Release( p_picture );
 454     return VLC_SUCCESS;
 455 }
 456
 457 /**
 458  * This function will handle a snapshot request
 459  */
 460 static void VoutSaveSnapshot( vout_thread_t *p_vout )
 461 {
 462     char *psz_path = var_GetNonEmptyString( p_vout, "snapshot-path" );
 463     char *psz_format = var_GetNonEmptyString( p_vout, "snapshot-format" );
 464     char *psz_prefix = var_GetNonEmptyString( p_vout, "snapshot-prefix" );
 465
 466     /* */
 467     picture_t *p_picture;
 468     block_t *p_image;
 469     video_format_t fmt;
 470
 471     /* 500ms timeout
 472      * XXX it will cause trouble with low fps video (< 2fps) */
 473     if( vout_GetSnapshot( p_vout, &p_image, &p_picture, &fmt, psz_format, 500*1000 ) )
 474     {
 475         p_picture = NULL;
 476         p_image = NULL;
 477         goto exit;
 478     }
 479
 480     if( !psz_path )
 481     {
 482         psz_path = vout_snapshot_GetDirectory();
 483         if( !psz_path )
 484         {
 485             msg_Err( p_vout, "no path specified for snapshots" );
 486             goto exit;
 487         }
 488     }
 489
 490     vout_snapshot_save_cfg_t cfg;
 491     memset( &cfg, 0, sizeof(cfg) );
 492     cfg.is_sequential = var_GetBool( p_vout, "snapshot-sequential" );
 493     cfg.sequence = var_GetInteger( p_vout, "snapshot-num" );
 494     cfg.path = psz_path;
 495     cfg.format = psz_format;
 496     cfg.prefix_fmt = psz_prefix;
 497
 498     char *psz_filename;
 499     int  i_sequence;
 500     if (vout_snapshot_SaveImage( &psz_filename, &i_sequence,
 501                                  p_image, VLC_OBJECT(p_vout), &cfg ) )
 502         goto exit;
 503     if( cfg.is_sequential )
 504         var_SetInteger( p_vout, "snapshot-num", i_sequence + 1 );
 505
 506     VoutOsdSnapshot( p_vout, p_picture, psz_filename );
 507
 508     /* signal creation of a new snapshot file */
 509     var_SetString( p_vout->p_libvlc, "snapshot-file", psz_filename );
 510
 511     free( psz_filename );
 512
 513 exit:
 514     if( p_image )
 515         block_Release( p_image );
 516     if( p_picture )
 517         picture_Release( p_picture );
 518     free( psz_prefix );
 519     free( psz_format );
 520     free( psz_path );
 521 }
 522
 523 /*****************************************************************************
 524  * Handle filters
 525  *****************************************************************************/
 526
 527 void vout_EnableFilter( vout_thread_t *p_vout, const char *psz_name,
 528                         bool b_add, bool b_setconfig )
 529 {
 530     char *psz_parser;
 531     char *psz_string;
 532     const char *psz_filter_type;
 533
 534     /* FIXME temporary hack */
 535     const char *psz_module_name = psz_name;
 536     if( !strcmp( psz_name, "magnify" ) ||
 537         !strcmp( psz_name, "puzzle" ) ||
 538         !strcmp( psz_name, "logo" ) ||
 539         !strcmp( psz_name, "wall" ) ||
 540         !strcmp( psz_name, "clone" ) )
 541         psz_module_name = "video_filter_wrapper";
 542
 543     module_t *p_obj = module_find( psz_module_name );
 544     if( !p_obj )
 545     {
 546         msg_Err( p_vout, "Unable to find filter module \"%s\".", psz_name );
 547         return;
 548     }
 549
 550     if( module_provides( p_obj, "video filter" ) )
 551     {
 552         psz_filter_type = "vout-filter";
 553     }
 554     else if( module_provides( p_obj, "video filter2" ) )
 555     {
 556         psz_filter_type = "video-filter";
 557     }
 558     else if( module_provides( p_obj, "sub filter" ) )
 559     {
 560         psz_filter_type = "sub-filter";
 561     }
 562     else
 563     {
 564         module_release( p_obj );
 565         msg_Err( p_vout, "Unknown video filter type." );
 566         return;
 567     }
 568     module_release( p_obj );
 569
 570     if( !strcmp( psz_filter_type, "sub-filter") )
 571         psz_string = var_GetString( vout_GetSpu( p_vout ), psz_filter_type );
 572     else
 573         psz_string = var_GetString( p_vout, psz_filter_type );
 574
 575     /* Todo : Use some generic chain manipulation functions */
 576     if( !psz_string ) psz_string = strdup("");
 577
 578     psz_parser = strstr( psz_string, psz_name );
 579     if( b_add )
 580     {
 581         if( !psz_parser )
 582         {
 583             psz_parser = psz_string;
 584             if( asprintf( &psz_string, (*psz_string) ? "%s:%s" : "%s%s",
 585                           psz_string, psz_name ) == -1 )
 586             {
 587                 free( psz_parser );
 588                 return;
 589             }
 590             free( psz_parser );
 591         }
 592         else
 593             return;
 594     }
 595     else
 596     {
 597         if( psz_parser )
 598         {
 599             memmove( psz_parser, psz_parser + strlen(psz_name) +
 600                             (*(psz_parser + strlen(psz_name)) == ':' ? 1 : 0 ),
 601                             strlen(psz_parser + strlen(psz_name)) + 1 );
 602
 603             /* Remove trailing : : */
 604             if( *(psz_string+strlen(psz_string ) -1 ) == ':' )
 605             {
 606                 *(psz_string+strlen(psz_string ) -1 ) = '\0';
 607             }
 608          }
 609          else
 610          {
 611              free( psz_string );
 612              return;
 613          }
 614     }
 615
 616     if( b_setconfig )
 617     {
 618         if( !strcmp( psz_filter_type, "sub-filter") )
 619             config_PutPsz( vout_GetSpu( p_vout ), psz_filter_type, psz_string );
 620         else
 621             config_PutPsz( p_vout, psz_filter_type, psz_string );
 622     }
 623
 624     if( !strcmp( psz_filter_type, "sub-filter") )
 625         var_SetString( vout_GetSpu( p_vout ), psz_filter_type, psz_string );
 626     else
 627         var_SetString( p_vout, psz_filter_type, psz_string );
 628
 629     free( psz_string );
 630 }
 631
 632 /*****************************************************************************
 633  * InitWindowSize: find the initial dimensions the video window should have.
 634  *****************************************************************************
 635  * This function will check the "width", "height" and "zoom" config options and
 636  * will calculate the size that the video window should have.
 637  *****************************************************************************/
 638 static void InitWindowSize( vout_thread_t *p_vout, unsigned *pi_width,
 639                             unsigned *pi_height )
 640 {
 641 #define FP_FACTOR 1000                             /* our fixed point factor */
 642
 643     int i_width = var_GetInteger( p_vout, "width" );
 644     int i_height = var_GetInteger( p_vout, "height" );
 645     float f_zoom = var_GetFloat( p_vout, "zoom" );
 646     uint64_t ll_zoom = (uint64_t)( FP_FACTOR * f_zoom );
 647
 648     if( i_width > 0 && i_height > 0)
 649     {
 650         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
 651         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
 652     }
 653     else if( i_width > 0 )
 654     {
 655         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
 656         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom *
 657             p_vout->fmt_in.i_sar_den * i_width / p_vout->fmt_in.i_sar_num /
 658             FP_FACTOR / p_vout->fmt_in.i_visible_width );
 659     }
 660     else if( i_height > 0 )
 661     {
 662         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
 663         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom *
 664             p_vout->fmt_in.i_sar_num * i_height / p_vout->fmt_in.i_sar_den /
 665             FP_FACTOR / p_vout->fmt_in.i_visible_height );
 666     }
 667     else if( p_vout->fmt_in.i_sar_num == 0 || p_vout->fmt_in.i_sar_den == 0 )
 668     {
 669         msg_Warn( p_vout, "aspect ratio screwed up" );
 670         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom / FP_FACTOR );
 671         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom /FP_FACTOR);
 672     }
 673     else if( p_vout->fmt_in.i_sar_num >= p_vout->fmt_in.i_sar_den )
 674     {
 675         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom *
 676             p_vout->fmt_in.i_sar_num / p_vout->fmt_in.i_sar_den / FP_FACTOR );
 677         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom
 678             / FP_FACTOR );
 679     }
 680     else
 681     {
 682         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom
 683             / FP_FACTOR );
 684         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom *
 685             p_vout->fmt_in.i_sar_den / p_vout->fmt_in.i_sar_num / FP_FACTOR );
 686     }
 687
 688     msg_Dbg( p_vout, "window size: %ux%u", *pi_width, *pi_height );
 689
 690 #undef FP_FACTOR
 691 }
 692
 693 /*****************************************************************************
 694  * Object variables callbacks
 695  *****************************************************************************/
 696 static int ZoomCallback( vlc_object_t *p_this, char const *psz_cmd,
 697                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 698 {
 699     (void)psz_cmd; (void)oldval; (void)p_data;
 700
 701     return var_SetFloat( p_this, "scale", newval.f_float );
 702 }
 703
 704 static int CropCallback( vlc_object_t *p_this, char const *psz_cmd,
 705                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 706 {
 707     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 708     int64_t i_aspect_num, i_aspect_den;
 709     unsigned int i_width, i_height;
 710
 711     (void)oldval; (void)p_data;
 712
 713     /* Restore defaults */
 714     p_vout->fmt_in.i_x_offset = p_vout->fmt_render.i_x_offset;
 715     p_vout->fmt_in.i_visible_width = p_vout->fmt_render.i_visible_width;
 716     p_vout->fmt_in.i_y_offset = p_vout->fmt_render.i_y_offset;
 717     p_vout->fmt_in.i_visible_height = p_vout->fmt_render.i_visible_height;
 718
 719     if( !strcmp( psz_cmd, "crop" ) )
 720     {
 721         char *psz_end = NULL, *psz_parser = strchr( newval.psz_string, ':' );
 722         if( psz_parser )
 723         {
 724             /* We're using the 3:4 syntax */
 725             i_aspect_num = strtol( newval.psz_string, &psz_end, 10 );
 726             if( psz_end == newval.psz_string || !i_aspect_num ) goto crop_end;
 727
 728             i_aspect_den = strtol( ++psz_parser, &psz_end, 10 );
 729             if( psz_end == psz_parser || !i_aspect_den ) goto crop_end;
 730
 731             i_width = p_vout->fmt_in.i_sar_den*p_vout->fmt_render.i_visible_height *
 732                 i_aspect_num / i_aspect_den / p_vout->fmt_in.i_sar_num;
 733             i_height = p_vout->fmt_render.i_visible_width*p_vout->fmt_in.i_sar_num *
 734                 i_aspect_den / i_aspect_num / p_vout->fmt_in.i_sar_den;
 735
 736             if( i_width < p_vout->fmt_render.i_visible_width )
 737             {
 738                 p_vout->fmt_in.i_x_offset = p_vout->fmt_render.i_x_offset +
 739                     (p_vout->fmt_render.i_visible_width - i_width) / 2;
 740                 p_vout->fmt_in.i_visible_width = i_width;
 741             }
 742             else
 743             {
 744                 p_vout->fmt_in.i_y_offset = p_vout->fmt_render.i_y_offset +
 745                     (p_vout->fmt_render.i_visible_height - i_height) / 2;
 746                 p_vout->fmt_in.i_visible_height = i_height;
 747             }
 748         }
 749         else
 750         {
 751             psz_parser = strchr( newval.psz_string, 'x' );
 752             if( psz_parser )
 753             {
 754                 /* Maybe we're using the <width>x<height>+<left>+<top> syntax */
 755                 unsigned int i_crop_width, i_crop_height, i_crop_top, i_crop_left;
 756
 757                 i_crop_width = strtol( newval.psz_string, &psz_end, 10 );
 758                 if( psz_end != psz_parser ) goto crop_end;
 759
 760                 psz_parser = strchr( ++psz_end, '+' );
 761                 i_crop_height = strtol( psz_end, &psz_end, 10 );
 762                 if( psz_end != psz_parser ) goto crop_end;
 763
 764                 psz_parser = strchr( ++psz_end, '+' );
 765                 i_crop_left = strtol( psz_end, &psz_end, 10 );
 766                 if( psz_end != psz_parser ) goto crop_end;
 767
 768                 psz_end++;
 769                 i_crop_top = strtol( psz_end, &psz_end, 10 );
 770                 if( *psz_end != '\0' ) goto crop_end;
 771
 772                 if( i_crop_top + i_crop_height >= p_vout->fmt_render.i_visible_height ||
 773                     i_crop_left + i_crop_width >= p_vout->fmt_render.i_visible_width )
 774                 {
 775                     msg_Err( p_vout, "Unable to crop over picture boundaries");
 776                     return VLC_EGENERIC;
 777                 }
 778
 779                 i_width = i_crop_width;
 780                 p_vout->fmt_in.i_visible_width = i_width;
 781
 782                 i_height = i_crop_height;
 783                 p_vout->fmt_in.i_visible_height = i_height;
 784
 785                 p_vout->fmt_in.i_x_offset = i_crop_left;
 786                 p_vout->fmt_in.i_y_offset = i_crop_top;
 787             }
 788             else
 789             {
 790                 /* Maybe we're using the <left>+<top>+<right>+<bottom> syntax */
 791                 unsigned int i_crop_top, i_crop_left, i_crop_bottom, i_crop_right;
 792
 793                 psz_parser = strchr( newval.psz_string, '+' );
 794                 i_crop_left = strtol( newval.psz_string, &psz_end, 10 );
 795                 if( psz_end != psz_parser ) goto crop_end;
 796
 797                 psz_parser = strchr( ++psz_end, '+' );
 798                 i_crop_top = strtol( psz_end, &psz_end, 10 );
 799                 if( psz_end != psz_parser ) goto crop_end;
 800
 801                 psz_parser = strchr( ++psz_end, '+' );
 802                 i_crop_right = strtol( psz_end, &psz_end, 10 );
 803                 if( psz_end != psz_parser ) goto crop_end;
 804
 805                 psz_end++;
 806                 i_crop_bottom = strtol( psz_end, &psz_end, 10 );
 807                 if( *psz_end != '\0' ) goto crop_end;
 808
 809                 if( i_crop_top + i_crop_bottom >= p_vout->fmt_render.i_visible_height ||
 810                     i_crop_right + i_crop_left >= p_vout->fmt_render.i_visible_width )
 811                 {
 812                     msg_Err( p_vout, "Unable to crop over picture boundaries" );
 813                     return VLC_EGENERIC;
 814                 }
 815
 816                 i_width = p_vout->fmt_render.i_visible_width
 817                           - i_crop_left - i_crop_right;
 818                 p_vout->fmt_in.i_visible_width = i_width;
 819
 820                 i_height = p_vout->fmt_render.i_visible_height
 821                            - i_crop_top - i_crop_bottom;
 822                 p_vout->fmt_in.i_visible_height = i_height;
 823
 824                 p_vout->fmt_in.i_x_offset = i_crop_left;
 825                 p_vout->fmt_in.i_y_offset = i_crop_top;
 826             }
 827         }
 828     }
 829     else if( !strcmp( psz_cmd, "crop-top" )
 830           || !strcmp( psz_cmd, "crop-left" )
 831           || !strcmp( psz_cmd, "crop-bottom" )
 832           || !strcmp( psz_cmd, "crop-right" ) )
 833     {
 834         unsigned int i_crop_top, i_crop_left, i_crop_bottom, i_crop_right;
 835
 836         i_crop_top = var_GetInteger( p_vout, "crop-top" );
 837         i_crop_left = var_GetInteger( p_vout, "crop-left" );
 838         i_crop_right = var_GetInteger( p_vout, "crop-right" );
 839         i_crop_bottom = var_GetInteger( p_vout, "crop-bottom" );
 840
 841         if( i_crop_top + i_crop_bottom >= p_vout->fmt_render.i_visible_height ||
 842             i_crop_right + i_crop_left >= p_vout->fmt_render.i_visible_width )
 843         {
 844             msg_Err( p_vout, "Unable to crop over picture boundaries" );
 845             return VLC_EGENERIC;
 846         }
 847
 848         i_width = p_vout->fmt_render.i_visible_width
 849                   - i_crop_left - i_crop_right;
 850         p_vout->fmt_in.i_visible_width = i_width;
 851
 852         i_height = p_vout->fmt_render.i_visible_height
 853                    - i_crop_top - i_crop_bottom;
 854         p_vout->fmt_in.i_visible_height = i_height;
 855
 856         p_vout->fmt_in.i_x_offset = i_crop_left;
 857         p_vout->fmt_in.i_y_offset = i_crop_top;
 858     }
 859
 860  crop_end:
 861     InitWindowSize( p_vout, &p_vout->i_window_width,
 862                     &p_vout->i_window_height );
 863
 864     p_vout->i_changes |= VOUT_CROP_CHANGE;
 865
 866     msg_Dbg( p_vout, "cropping picture %ix%i to %i,%i,%ix%i",
 867              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 868              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 869              p_vout->fmt_in.i_visible_width,
 870              p_vout->fmt_in.i_visible_height );
 871
 872     var_TriggerCallback( p_vout, "crop-update" );
 873
 874     return VLC_SUCCESS;
 875 }
 876
 877 static int AspectCallback( vlc_object_t *p_this, char const *psz_cmd,
 878                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 879 {
 880     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 881     unsigned int i_aspect_num, i_aspect_den, i_sar_num, i_sar_den;
 882     vlc_value_t val;
 883
 884     char *psz_end, *psz_parser = strchr( newval.psz_string, ':' );
 885     (void)psz_cmd; (void)oldval; (void)p_data;
 886
 887     /* Restore defaults */
 888     p_vout->fmt_in.i_sar_num = p_vout->fmt_render.i_sar_num;
 889     p_vout->fmt_in.i_sar_den = p_vout->fmt_render.i_sar_den;
 890     p_vout->render.i_aspect = (int64_t)p_vout->fmt_render.i_sar_num *
 891                                        p_vout->fmt_render.i_width *
 892                                        VOUT_ASPECT_FACTOR /
 893                                        p_vout->fmt_render.i_sar_den / p_vout->fmt_render.i_height;
 894
 895     if( !psz_parser ) goto aspect_end;
 896
 897     i_aspect_num = strtol( newval.psz_string, &psz_end, 10 );
 898     if( psz_end == newval.psz_string || !i_aspect_num ) goto aspect_end;
 899
 900     i_aspect_den = strtol( ++psz_parser, &psz_end, 10 );
 901     if( psz_end == psz_parser || !i_aspect_den ) goto aspect_end;
 902
 903     i_sar_num = i_aspect_num * p_vout->fmt_render.i_visible_height;
 904     i_sar_den = i_aspect_den * p_vout->fmt_render.i_visible_width;
 905     vlc_ureduce( &i_sar_num, &i_sar_den, i_sar_num, i_sar_den, 0 );
 906     p_vout->fmt_in.i_sar_num = i_sar_num;
 907     p_vout->fmt_in.i_sar_den = i_sar_den;
 908     p_vout->render.i_aspect = i_aspect_num * VOUT_ASPECT_FACTOR / i_aspect_den;
 909
 910  aspect_end:
 911     if( p_vout->p->i_par_num && p_vout->p->i_par_den )
 912     {
 913         p_vout->fmt_in.i_sar_num *= p_vout->p->i_par_den;
 914         p_vout->fmt_in.i_sar_den *= p_vout->p->i_par_num;
 915         p_vout->render.i_aspect = (int64_t)p_vout->fmt_in.i_sar_num *
 916                                            p_vout->fmt_in.i_width *
 917                                            VOUT_ASPECT_FACTOR /
 918                                            p_vout->fmt_in.i_sar_den /
 919                                            p_vout->fmt_in.i_height;
 920     }
 921
 922     p_vout->i_changes |= VOUT_ASPECT_CHANGE;
 923
 924     msg_Dbg( p_vout, "new aspect-ratio %i:%i, sample aspect-ratio %i:%i",
 925              p_vout->fmt_in.i_sar_num * p_vout->fmt_in.i_width,
 926              p_vout->fmt_in.i_sar_den * p_vout->fmt_in.i_height,
 927              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 928
 929     if( var_Get( p_vout, "crop", &val ) )
 930         return VLC_EGENERIC;
 931
 932     int i_ret = CropCallback( p_this, "crop", val, val, 0 );
 933     free( val.psz_string );
 934     return i_ret;
 935 }
 936
 937 static int ScalingCallback( vlc_object_t *p_this, char const *psz_cmd,
 938                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 939 {
 940     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 941     (void)oldval; (void)newval; (void)p_data;
 942
 943     vlc_mutex_lock( &p_vout->change_lock );
 944
 945     if( !strcmp( psz_cmd, "autoscale" ) )
 946     {
 947         p_vout->i_changes |= VOUT_SCALE_CHANGE;
 948     }
 949     else if( !strcmp( psz_cmd, "scale" ) )
 950     {
 951         p_vout->i_changes |= VOUT_ZOOM_CHANGE;
 952     }
 953
 954     vlc_mutex_unlock( &p_vout->change_lock );
 955
 956     return VLC_SUCCESS;
 957 }
 958
 959 static int OnTopCallback( vlc_object_t *p_this, char const *psz_cmd,
 960                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 961 {
 962     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 963
 964     vlc_mutex_lock( &p_vout->change_lock );
 965     p_vout->i_changes |= VOUT_ON_TOP_CHANGE;
 966     p_vout->b_on_top = newval.b_bool;
 967     vlc_mutex_unlock( &p_vout->change_lock );
 968
 969     (void)psz_cmd; (void)oldval; (void)p_data;
 970     return VLC_SUCCESS;
 971 }
 972
 973 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
 974                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 975 {
 976     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 977     vlc_value_t val;
 978     (void)psz_cmd; (void)p_data;
 979
 980     if( oldval.b_bool == newval.b_bool )
 981         return VLC_SUCCESS; /* no-op */
 982     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 983
 984     val.b_bool = true;
 985     var_Set( p_vout, "intf-change", val );
 986     return VLC_SUCCESS;
 987 }
 988
 989 static int SnapshotCallback( vlc_object_t *p_this, char const *psz_cmd,
 990                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 991 {
 992     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 993     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 994     VLC_UNUSED(newval); VLC_UNUSED(p_data);
 995
 996     VoutSaveSnapshot( p_vout );
 997     return VLC_SUCCESS;
 998 }
 999
1000 static int TitleShowCallback( vlc_object_t *p_this, char const *psz_cmd,
1001                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1002 {
1003     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
1004     VLC_UNUSED(p_data);
1005     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1006     p_vout->p->b_title_show = newval.b_bool;
1007     return VLC_SUCCESS;
1008 }
1009
1010 static int TitleTimeoutCallback( vlc_object_t *p_this, char const *psz_cmd,
1011                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1012 {
1013     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
1014     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1015     p_vout->p->i_title_timeout = (mtime_t) newval.i_int;
1016     return VLC_SUCCESS;
1017 }
1018
1019 static int TitlePositionCallback( vlc_object_t *p_this, char const *psz_cmd,
1020                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1021 {
1022     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
1023     VLC_UNUSED(p_data);
1024     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1025     p_vout->p->i_title_position = newval.i_int;
1026     return VLC_SUCCESS;
1027 }