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