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

   1 /*****************************************************************************
   2  * vout_intf.c : video output interface
   3  *****************************************************************************
   4  * Copyright (C) 2000-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                                /* free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/intf.h>
  31 #include <vlc_block.h>
  32
  33 #include "vlc_video.h"
  34 #include "video_output.h"
  35 #include "vlc_image.h"
  36 #include "vlc_spu.h"
  37
  38 #include <snapshot.h>
  39
  40 /*****************************************************************************
  41  * Local prototypes
  42  *****************************************************************************/
  43 static void InitWindowSize( vout_thread_t *, unsigned *, unsigned * );
  44
  45 /* Object variables callbacks */
  46 static int ZoomCallback( vlc_object_t *, char const *,
  47                          vlc_value_t, vlc_value_t, void * );
  48 static int CropCallback( vlc_object_t *, char const *,
  49                          vlc_value_t, vlc_value_t, void * );
  50 static int AspectCallback( vlc_object_t *, char const *,
  51                            vlc_value_t, vlc_value_t, void * );
  52 static int OnTopCallback( vlc_object_t *, char const *,
  53                           vlc_value_t, vlc_value_t, void * );
  54 static int FullscreenCallback( vlc_object_t *, char const *,
  55                                vlc_value_t, vlc_value_t, void * );
  56 static int SnapshotCallback( vlc_object_t *, char const *,
  57                              vlc_value_t, vlc_value_t, void * );
  58
  59 /*****************************************************************************
  60  * vout_RequestWindow: Create/Get a video window if possible.
  61  *****************************************************************************
  62  * This function looks for the main interface and tries to request
  63  * a new video window. If it fails then the vout will still need to create the
  64  * window by itself.
  65  *****************************************************************************/
  66 void *vout_RequestWindow( vout_thread_t *p_vout,
  67                           int *pi_x_hint, int *pi_y_hint,
  68                           unsigned int *pi_width_hint,
  69                           unsigned int *pi_height_hint )
  70 {
  71     intf_thread_t *p_intf = NULL;
  72     vlc_list_t *p_list;
  73     void *p_window;
  74     vlc_value_t val;
  75     int i;
  76
  77     /* Small kludge */
  78     if( !var_Type( p_vout, "aspect-ratio" ) ) vout_IntfInit( p_vout );
  79
  80     /* Get requested coordinates */
  81     var_Get( p_vout, "video-x", &val );
  82     *pi_x_hint = val.i_int ;
  83     var_Get( p_vout, "video-y", &val );
  84     *pi_y_hint = val.i_int;
  85
  86     *pi_width_hint = p_vout->i_window_width;
  87     *pi_height_hint = p_vout->i_window_height;
  88
  89     /* Check whether someone provided us with a window ID */
  90     var_Get( p_vout->p_vlc, "drawable", &val );
  91     if( val.i_int ) return (void *)val.i_int;
  92
  93     /* Find if the main interface supports embedding */
  94     p_list = vlc_list_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
  95     if( !p_list ) return NULL;
  96
  97     for( i = 0; i < p_list->i_count; i++ )
  98     {
  99         p_intf = (intf_thread_t *)p_list->p_values[i].p_object;
 100         if( p_intf->b_block && p_intf->pf_request_window ) break;
 101         p_intf = NULL;
 102     }
 103
 104     if( !p_intf )
 105     {
 106         vlc_list_release( p_list );
 107         return NULL;
 108     }
 109
 110     vlc_object_yield( p_intf );
 111     vlc_list_release( p_list );
 112
 113     p_window = p_intf->pf_request_window( p_intf, p_vout, pi_x_hint, pi_y_hint,
 114                                           pi_width_hint, pi_height_hint );
 115
 116     if( !p_window ) vlc_object_release( p_intf );
 117     else p_vout->p_parent_intf = p_intf;
 118
 119     return p_window;
 120 }
 121
 122 void vout_ReleaseWindow( vout_thread_t *p_vout, void *p_window )
 123 {
 124     intf_thread_t *p_intf = p_vout->p_parent_intf;
 125
 126     if( !p_intf ) return;
 127
 128     vlc_mutex_lock( &p_intf->object_lock );
 129     if( p_intf->b_dead )
 130     {
 131         vlc_mutex_unlock( &p_intf->object_lock );
 132         return;
 133     }
 134
 135     if( !p_intf->pf_release_window )
 136     {
 137         msg_Err( p_vout, "no pf_release_window");
 138         vlc_mutex_unlock( &p_intf->object_lock );
 139         vlc_object_release( p_intf );
 140         return;
 141     }
 142
 143     p_intf->pf_release_window( p_intf, p_window );
 144
 145     p_vout->p_parent_intf = NULL;
 146     vlc_mutex_unlock( &p_intf->object_lock );
 147     vlc_object_release( p_intf );
 148 }
 149
 150 int vout_ControlWindow( vout_thread_t *p_vout, void *p_window,
 151                         int i_query, va_list args )
 152 {
 153     intf_thread_t *p_intf = p_vout->p_parent_intf;
 154     int i_ret;
 155
 156     if( !p_intf ) return VLC_EGENERIC;
 157
 158     vlc_mutex_lock( &p_intf->object_lock );
 159     if( p_intf->b_dead )
 160     {
 161         vlc_mutex_unlock( &p_intf->object_lock );
 162         return VLC_EGENERIC;
 163     }
 164
 165     if( !p_intf->pf_control_window )
 166     {
 167         msg_Err( p_vout, "no pf_control_window");
 168         vlc_mutex_unlock( &p_intf->object_lock );
 169         return VLC_EGENERIC;
 170     }
 171
 172     i_ret = p_intf->pf_control_window( p_intf, p_window, i_query, args );
 173     vlc_mutex_unlock( &p_intf->object_lock );
 174     return i_ret;
 175 }
 176
 177 /*****************************************************************************
 178  * vout_IntfInit: called during the vout creation to initialise misc things.
 179  *****************************************************************************/
 180 void vout_IntfInit( vout_thread_t *p_vout )
 181 {
 182     vlc_value_t val, text, old_val;
 183     vlc_bool_t b_force_par = VLC_FALSE;
 184
 185     /* Create a few object variables we'll need later on */
 186     var_Create( p_vout, "snapshot-path", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 187     var_Create( p_vout, "snapshot-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 188     var_Create( p_vout, "snapshot-preview", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 189     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 190     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 191     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 192     var_Get( p_vout, "align", &val );
 193     p_vout->i_alignment = val.i_int;
 194
 195     var_Create( p_vout, "video-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 196     var_Create( p_vout, "video-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 197
 198     /* Zoom object var */
 199     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_ISCOMMAND |
 200                 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
 201
 202     text.psz_string = _("Zoom");
 203     var_Change( p_vout, "zoom", VLC_VAR_SETTEXT, &text, NULL );
 204
 205     var_Get( p_vout, "zoom", &old_val );
 206     if( old_val.f_float == 0.25 ||
 207         old_val.f_float == 0.5 ||
 208         old_val.f_float == 1 ||
 209         old_val.f_float == 2 )
 210     {
 211         var_Change( p_vout, "zoom", VLC_VAR_DELCHOICE, &old_val, NULL );
 212     }
 213
 214     val.f_float = 0.25; text.psz_string = _("1:4 Quarter");
 215     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 216     val.f_float = 0.5; text.psz_string = _("1:2 Half");
 217     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 218     val.f_float = 1; text.psz_string = _("1:1 Original");
 219     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 220     val.f_float = 2; text.psz_string = _("2:1 Double");
 221     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 222
 223     var_Set( p_vout, "zoom", old_val );
 224
 225     var_AddCallback( p_vout, "zoom", ZoomCallback, NULL );
 226
 227     /* Crop object var */
 228     var_Create( p_vout, "crop", VLC_VAR_STRING |
 229                 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
 230
 231     text.psz_string = _("Crop");
 232     var_Change( p_vout, "crop", VLC_VAR_SETTEXT, &text, NULL );
 233
 234     val.psz_string = "";
 235     var_Change( p_vout, "crop", VLC_VAR_DELCHOICE, &val, 0 );
 236     val.psz_string = ""; text.psz_string = _("Default");
 237     var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 238     val.psz_string = "001:1"; text.psz_string = "1:1";
 239     var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 240     val.psz_string = "004:3"; text.psz_string = "4:3";
 241     var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 242     val.psz_string = "16:10"; text.psz_string = "16:10";
 243     var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 244     val.psz_string = "16:9"; text.psz_string = "16:9";
 245     var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 246     val.psz_string = "221:100"; text.psz_string = "221:100";
 247     var_Change( p_vout, "crop", VLC_VAR_ADDCHOICE, &val, &text );
 248
 249     var_AddCallback( p_vout, "crop", CropCallback, NULL );
 250     var_Get( p_vout, "crop", &old_val );
 251     if( old_val.psz_string && *old_val.psz_string )
 252         var_Change( p_vout, "crop", VLC_VAR_TRIGGER_CALLBACKS, 0, 0 );
 253     if( old_val.psz_string ) free( old_val.psz_string );
 254
 255     /* Monitor pixel aspect-ratio */
 256     var_Create( p_vout, "monitor-par", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 257     var_Get( p_vout, "monitor-par", &val );
 258     if( val.psz_string && *val.psz_string )
 259     {
 260         char *psz_parser = strchr( val.psz_string, ':' );
 261         unsigned int i_aspect_num = 0, i_aspect_den = 0;
 262         float i_aspect = 0;
 263         if( psz_parser )
 264         {
 265             i_aspect_num = strtol( val.psz_string, 0, 0 );
 266             i_aspect_den = strtol( ++psz_parser, 0, 0 );
 267         }
 268         else
 269         {
 270             i_aspect = atof( val.psz_string );
 271             vlc_ureduce( &i_aspect_num, &i_aspect_den,
 272                          i_aspect *VOUT_ASPECT_FACTOR, VOUT_ASPECT_FACTOR, 0 );
 273         }
 274         if( !i_aspect_num || !i_aspect_den ) i_aspect_num = i_aspect_den = 1;
 275
 276         p_vout->i_par_num = i_aspect_num;
 277         p_vout->i_par_den = i_aspect_den;
 278
 279         vlc_ureduce( &p_vout->i_par_num, &p_vout->i_par_den,
 280                      p_vout->i_par_num, p_vout->i_par_den, 0 );
 281
 282         msg_Dbg( p_vout, "monitor pixel aspect-ratio overriding: %i:%i",
 283                  p_vout->i_par_num, p_vout->i_par_den );
 284         b_force_par = VLC_TRUE;
 285     }
 286     if( val.psz_string ) free( val.psz_string );
 287
 288     /* Aspect-ratio object var */
 289     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING |
 290                 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
 291
 292     text.psz_string = _("Aspect-ratio");
 293     var_Change( p_vout, "aspect-ratio", VLC_VAR_SETTEXT, &text, NULL );
 294
 295     val.psz_string = "";
 296     var_Change( p_vout, "aspect-ratio", VLC_VAR_DELCHOICE, &val, 0 );
 297     val.psz_string = ""; text.psz_string = _("Default");
 298     var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 299     val.psz_string = "001:1"; text.psz_string = "1:1";
 300     var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 301     val.psz_string = "004:3"; text.psz_string = "4:3";
 302     var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 303     val.psz_string = "16:10"; text.psz_string = "16:10";
 304     var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 305     val.psz_string = "16:9"; text.psz_string = "16:9";
 306     var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 307     val.psz_string = "221:100"; text.psz_string = "221:100";
 308     var_Change( p_vout, "aspect-ratio", VLC_VAR_ADDCHOICE, &val, &text );
 309
 310     var_AddCallback( p_vout, "aspect-ratio", AspectCallback, NULL );
 311     var_Get( p_vout, "aspect-ratio", &old_val );
 312     if( (old_val.psz_string && *old_val.psz_string) || b_force_par )
 313         var_Change( p_vout, "aspect-ratio", VLC_VAR_TRIGGER_CALLBACKS, 0, 0 );
 314     if( old_val.psz_string ) free( old_val.psz_string );
 315
 316     /* Initialize the dimensions of the video window */
 317     InitWindowSize( p_vout, &p_vout->i_window_width,
 318                     &p_vout->i_window_height );
 319
 320     /* Add a variable to indicate if the window should be on top of others */
 321     var_Create( p_vout, "video-on-top", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 322     text.psz_string = _("Always on top");
 323     var_Change( p_vout, "video-on-top", VLC_VAR_SETTEXT, &text, NULL );
 324     var_AddCallback( p_vout, "video-on-top", OnTopCallback, NULL );
 325
 326     /* Add a variable to indicate whether we want window decoration or not */
 327     var_Create( p_vout, "video-deco", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 328
 329     /* Add a fullscreen variable */
 330     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
 331     text.psz_string = _("Fullscreen");
 332     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 333     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 334     if( val.b_bool )
 335     {
 336         /* user requested fullscreen */
 337         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 338     }
 339     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 340
 341     /* Add a snapshot variable */
 342     var_Create( p_vout, "video-snapshot", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
 343     text.psz_string = _("Snapshot");
 344     var_Change( p_vout, "video-snapshot", VLC_VAR_SETTEXT, &text, NULL );
 345     var_AddCallback( p_vout, "video-snapshot", SnapshotCallback, NULL );
 346
 347     /* Mouse coordinates */
 348     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 349     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 350     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 351     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 352     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 353
 354     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 355     val.b_bool = VLC_TRUE;
 356     var_Set( p_vout, "intf-change", val );
 357 }
 358
 359 /*****************************************************************************
 360  * vout_Snapshot: generates a snapshot.
 361  *****************************************************************************/
 362 int vout_Snapshot( vout_thread_t *p_vout, picture_t *p_pic )
 363 {
 364     image_handler_t *p_image = image_HandlerCreate( p_vout );
 365     video_format_t fmt_in = {0}, fmt_out = {0};
 366     char *psz_filename;
 367     subpicture_t *p_subpic;
 368     picture_t *p_pif;
 369     vlc_value_t val, format;
 370     int i_ret;
 371
 372     var_Get( p_vout, "snapshot-path", &val );
 373     if( val.psz_string && !*val.psz_string )
 374     {
 375         free( val.psz_string );
 376         val.psz_string = 0;
 377     }
 378
 379 #if defined(SYS_DARWIN) || defined(SYS_BEOS)
 380     if( !val.psz_string && p_vout->p_vlc->psz_homedir )
 381     {
 382         asprintf( &val.psz_string, "%s/Desktop",
 383                   p_vout->p_vlc->psz_homedir );
 384     }
 385
 386 #elif defined(WIN32) && !defined(UNDER_CE)
 387     if( !val.psz_string && p_vout->p_vlc->psz_homedir )
 388     {
 389         /* Get the My Pictures folder path */
 390
 391         char *p_mypicturesdir = NULL;
 392         typedef HRESULT (WINAPI *SHGETFOLDERPATH)( HWND, int, HANDLE, DWORD,
 393                                                    LPSTR );
 394         #ifndef CSIDL_FLAG_CREATE
 395         #   define CSIDL_FLAG_CREATE 0x8000
 396         #endif
 397         #ifndef CSIDL_MYPICTURES
 398         #   define CSIDL_MYPICTURES 0x27
 399         #endif
 400         #ifndef SHGFP_TYPE_CURRENT
 401         #   define SHGFP_TYPE_CURRENT 0
 402         #endif
 403
 404         HINSTANCE shfolder_dll;
 405         SHGETFOLDERPATH SHGetFolderPath ;
 406
 407         /* load the shfolder dll to retrieve SHGetFolderPath */
 408         if( ( shfolder_dll = LoadLibrary( _T("SHFolder.dll") ) ) != NULL )
 409         {
 410             SHGetFolderPath = (void *)GetProcAddress( shfolder_dll,
 411                                                       _T("SHGetFolderPathA") );
 412             if( SHGetFolderPath != NULL )
 413             {
 414                 p_mypicturesdir = (char *)malloc( MAX_PATH );
 415                 if( p_mypicturesdir )
 416                 {
 417
 418                     if( S_OK != SHGetFolderPath( NULL,
 419                                         CSIDL_MYPICTURES | CSIDL_FLAG_CREATE,
 420                                         NULL, SHGFP_TYPE_CURRENT,
 421                                         p_mypicturesdir ) )
 422                     {
 423                         free( p_mypicturesdir );
 424                         p_mypicturesdir = NULL;
 425                     }
 426                 }
 427             }
 428             FreeLibrary( shfolder_dll );
 429         }
 430
 431         if( p_mypicturesdir == NULL )
 432         {
 433             asprintf( &val.psz_string, "%s/" CONFIG_DIR,
 434                       p_vout->p_vlc->psz_homedir );
 435         }
 436         else
 437         {
 438             asprintf( &val.psz_string, p_mypicturesdir );
 439             free( p_mypicturesdir );
 440         }
 441     }
 442
 443 #else
 444     if( !val.psz_string && p_vout->p_vlc->psz_homedir )
 445     {
 446         asprintf( &val.psz_string, "%s/" CONFIG_DIR,
 447                   p_vout->p_vlc->psz_homedir );
 448     }
 449 #endif
 450
 451     if( !val.psz_string )
 452     {
 453         msg_Err( p_vout, "no directory specified for snapshots" );
 454         return VLC_EGENERIC;
 455     }
 456     var_Get( p_vout, "snapshot-format", &format );
 457     if( !format.psz_string || !*format.psz_string )
 458     {
 459         if( format.psz_string ) free( format.psz_string );
 460         format.psz_string = strdup( "png" );
 461     }
 462
 463     /* Embedded snapshot : if snapshot-path == object:object-id, then
 464        create a snapshot_t* and store it in
 465        object(object-id)->p_private, then unlock and signal the
 466        waiting object.
 467      */
 468     if( !strncmp( val.psz_string, "object:", 7 ) )
 469     {
 470         int i_id;
 471         vlc_object_t* p_dest;
 472         block_t *p_block;
 473         snapshot_t *p_snapshot;
 474         int i_size;
 475
 476         /* Destination object-id is following object: */
 477         i_id = atoi( &val.psz_string[7] );
 478         p_dest = ( vlc_object_t* )vlc_current_object( i_id );
 479         if( !p_dest )
 480         {
 481             msg_Err( p_vout, "Cannot find calling object" );
 482             image_HandlerDelete( p_image );
 483             return VLC_EGENERIC;
 484         }
 485         /* Object must be locked. We will unlock it once we get the
 486            snapshot and written it to p_private */
 487         p_dest->p_private = NULL;
 488
 489         /* Save the snapshot to a memory zone */
 490         fmt_in = p_vout->fmt_in;
 491         fmt_out.i_sar_num = fmt_out.i_sar_den = 1;
 492         fmt_out.i_width = 320;
 493         fmt_out.i_height = 200;
 494         fmt_out.i_chroma = VLC_FOURCC( 'p','n','g',' ' );
 495         p_block = ( block_t* ) image_Write( p_image, p_pic, &fmt_in, &fmt_out );
 496         if( !p_block )
 497         {
 498             msg_Err( p_vout, "Could not get snapshot" );
 499             image_HandlerDelete( p_image );
 500             vlc_cond_signal( &p_dest->object_wait );
 501             vlc_mutex_unlock( &p_dest->object_lock );
 502             vlc_object_release( p_dest );
 503             return VLC_EGENERIC;
 504         }
 505
 506         /* Copy the p_block data to a snapshot structure */
 507         /* FIXME: get the timestamp */
 508         p_snapshot = ( snapshot_t* ) malloc( sizeof( snapshot_t ) );
 509         if( !p_snapshot )
 510         {
 511             block_Release( p_block );
 512             image_HandlerDelete( p_image );
 513             vlc_cond_signal( &p_dest->object_wait );
 514             vlc_mutex_unlock( &p_dest->object_lock );
 515             vlc_object_release( p_dest );
 516             return VLC_ENOMEM;
 517         }
 518
 519         i_size = p_block->i_buffer;
 520
 521         p_snapshot->i_width = fmt_out.i_width;
 522         p_snapshot->i_height = fmt_out.i_height;
 523         p_snapshot->i_datasize = i_size;
 524         p_snapshot->date = p_block->i_pts; /* FIXME ?? */
 525         p_snapshot->p_data = ( char* ) malloc( i_size );
 526         if( !p_snapshot->p_data )
 527         {
 528             block_Release( p_block );
 529             free( p_snapshot );
 530             image_HandlerDelete( p_image );
 531             vlc_cond_signal( &p_dest->object_wait );
 532             vlc_mutex_unlock( &p_dest->object_lock );
 533             vlc_object_release( p_dest );
 534             return VLC_ENOMEM;
 535         }
 536         memcpy( p_snapshot->p_data, p_block->p_buffer, p_block->i_buffer );
 537
 538         p_dest->p_private = p_snapshot;
 539
 540         block_Release( p_block );
 541
 542         /* Unlock the object */
 543         vlc_cond_signal( &p_dest->object_wait );
 544         vlc_mutex_unlock( &p_dest->object_lock );
 545         vlc_object_release( p_dest );
 546
 547         image_HandlerDelete( p_image );
 548         return VLC_SUCCESS;
 549     }
 550
 551     asprintf( &psz_filename, "%s/vlcsnap-%u.%s", val.psz_string,
 552               (unsigned int)(p_pic->date / 100000) & 0xFFFFFF,
 553               format.psz_string );
 554     free( val.psz_string );
 555     free( format.psz_string );
 556
 557     /* Save the snapshot */
 558     fmt_in = p_vout->fmt_in;
 559     fmt_out.i_sar_num = fmt_out.i_sar_den = 1;
 560     i_ret = image_WriteUrl( p_image, p_pic, &fmt_in, &fmt_out, psz_filename );
 561     if( i_ret != VLC_SUCCESS )
 562     {
 563         msg_Err( p_vout, "could not create snapshot %s", psz_filename );
 564         free( psz_filename );
 565         image_HandlerDelete( p_image );
 566         return VLC_EGENERIC;
 567     }
 568
 569     msg_Dbg( p_vout, "snapshot taken (%s)", psz_filename );
 570     free( psz_filename );
 571
 572     if( var_GetBool( p_vout, "snapshot-preview" ) )
 573     {
 574         /* Inject a subpicture with the snapshot */
 575         memset( &fmt_out, 0, sizeof(fmt_out) );
 576         fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 577         p_pif = image_Convert( p_image, p_pic, &fmt_in, &fmt_out );
 578         image_HandlerDelete( p_image );
 579         if( !p_pif ) return VLC_EGENERIC;
 580
 581         p_subpic = spu_CreateSubpicture( p_vout->p_spu );
 582         if( p_subpic == NULL )
 583         {
 584              p_pif->pf_release( p_pif );
 585              return VLC_EGENERIC;
 586         }
 587
 588         p_subpic->i_channel = 0;
 589         p_subpic->i_start = mdate();
 590         p_subpic->i_stop = mdate() + 4000000;
 591         p_subpic->b_ephemer = VLC_TRUE;
 592         p_subpic->b_fade = VLC_TRUE;
 593         p_subpic->i_original_picture_width = p_vout->render.i_width * 4;
 594         p_subpic->i_original_picture_height = p_vout->render.i_height * 4;
 595
 596         p_subpic->p_region = spu_CreateRegion( p_vout->p_spu, &fmt_out );
 597         vout_CopyPicture( p_image->p_parent, &p_subpic->p_region->picture,
 598                           p_pif );
 599         p_pif->pf_release( p_pif );
 600
 601         spu_DisplaySubpicture( p_vout->p_spu, p_subpic );
 602     }
 603     else
 604     {
 605         image_HandlerDelete( p_image );
 606     }
 607
 608     return VLC_SUCCESS;
 609 }
 610
 611 /*****************************************************************************
 612  * vout_ControlDefault: default methods for video output control.
 613  *****************************************************************************/
 614 int vout_vaControlDefault( vout_thread_t *p_vout, int i_query, va_list args )
 615 {
 616     switch( i_query )
 617     {
 618     case VOUT_REPARENT:
 619     case VOUT_CLOSE:
 620         if( p_vout->p_parent_intf )
 621         {
 622             vlc_object_release( p_vout->p_parent_intf );
 623             p_vout->p_parent_intf = NULL;
 624         }
 625         return VLC_SUCCESS;
 626         break;
 627
 628     case VOUT_SNAPSHOT:
 629         p_vout->b_snapshot = VLC_TRUE;
 630         return VLC_SUCCESS;
 631         break;
 632
 633     default:
 634         msg_Dbg( p_vout, "control query not supported" );
 635         return VLC_EGENERIC;
 636     }
 637 }
 638
 639 /*****************************************************************************
 640  * InitWindowSize: find the initial dimensions the video window should have.
 641  *****************************************************************************
 642  * This function will check the "width", "height" and "zoom" config options and
 643  * will calculate the size that the video window should have.
 644  *****************************************************************************/
 645 static void InitWindowSize( vout_thread_t *p_vout, unsigned *pi_width,
 646                             unsigned *pi_height )
 647 {
 648     vlc_value_t val;
 649     int i_width, i_height;
 650     uint64_t ll_zoom;
 651
 652 #define FP_FACTOR 1000                             /* our fixed point factor */
 653
 654     var_Get( p_vout, "width", &val );
 655     i_width = val.i_int;
 656     var_Get( p_vout, "height", &val );
 657     i_height = val.i_int;
 658     var_Get( p_vout, "zoom", &val );
 659     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
 660
 661     if( i_width > 0 && i_height > 0)
 662     {
 663         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
 664         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
 665         goto initwsize_end;
 666     }
 667     else if( i_width > 0 )
 668     {
 669         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
 670         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom *
 671             p_vout->fmt_in.i_sar_den * i_width / p_vout->fmt_in.i_sar_num /
 672             FP_FACTOR / p_vout->fmt_in.i_visible_width );
 673         goto initwsize_end;
 674     }
 675     else if( i_height > 0 )
 676     {
 677         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
 678         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom *
 679             p_vout->fmt_in.i_sar_num * i_height / p_vout->fmt_in.i_sar_den /
 680             FP_FACTOR / p_vout->fmt_in.i_visible_height );
 681         goto initwsize_end;
 682     }
 683
 684     if( p_vout->fmt_in.i_sar_num >= p_vout->fmt_in.i_sar_den )
 685     {
 686         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom *
 687             p_vout->fmt_in.i_sar_num / p_vout->fmt_in.i_sar_den / FP_FACTOR );
 688         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom
 689             / FP_FACTOR );
 690     }
 691     else
 692     {
 693         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom
 694             / FP_FACTOR );
 695         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom *
 696             p_vout->fmt_in.i_sar_den / p_vout->fmt_in.i_sar_num / FP_FACTOR );
 697     }
 698
 699 initwsize_end:
 700     msg_Dbg( p_vout, "window size: %dx%d", p_vout->i_window_width,
 701              p_vout->i_window_height );
 702
 703 #undef FP_FACTOR
 704 }
 705
 706 /*****************************************************************************
 707  * Object variables callbacks
 708  *****************************************************************************/
 709 static int ZoomCallback( vlc_object_t *p_this, char const *psz_cmd,
 710                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 711 {
 712     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 713     InitWindowSize( p_vout, &p_vout->i_window_width,
 714                     &p_vout->i_window_height );
 715     vout_Control( p_vout, VOUT_SET_SIZE, 0, 0 );
 716     return VLC_SUCCESS;
 717 }
 718
 719 static int CropCallback( vlc_object_t *p_this, char const *psz_cmd,
 720                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 721 {
 722     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 723     int64_t i_aspect_num, i_aspect_den;
 724     unsigned int i_width, i_height;
 725
 726     char *psz_end, *psz_parser = strchr( newval.psz_string, ':' );
 727
 728     /* Restore defaults */
 729     p_vout->fmt_in.i_x_offset = p_vout->fmt_render.i_x_offset;
 730     p_vout->fmt_in.i_visible_width = p_vout->fmt_render.i_visible_width;
 731     p_vout->fmt_in.i_y_offset = p_vout->fmt_render.i_y_offset;
 732     p_vout->fmt_in.i_visible_height = p_vout->fmt_render.i_visible_height;
 733
 734     if( !psz_parser ) goto crop_end;
 735
 736     i_aspect_num = strtol( newval.psz_string, &psz_end, 0 );
 737     if( psz_end == newval.psz_string || !i_aspect_num ) goto crop_end;
 738
 739     i_aspect_den = strtol( ++psz_parser, &psz_end, 0 );
 740     if( psz_end == psz_parser || !i_aspect_den ) goto crop_end;
 741
 742     i_width = p_vout->fmt_in.i_sar_den * p_vout->fmt_render.i_visible_height *
 743         i_aspect_num / i_aspect_den / p_vout->fmt_in.i_sar_num;
 744     i_height = p_vout->fmt_render.i_visible_width * p_vout->fmt_in.i_sar_num *
 745         i_aspect_den / i_aspect_num / p_vout->fmt_in.i_sar_den;
 746
 747     if( i_width < p_vout->fmt_render.i_visible_width )
 748     {
 749         p_vout->fmt_in.i_x_offset = p_vout->fmt_render.i_x_offset +
 750             (p_vout->fmt_render.i_visible_width - i_width) / 2;
 751         p_vout->fmt_in.i_visible_width = i_width;
 752     }
 753     else
 754     {
 755         p_vout->fmt_in.i_y_offset = p_vout->fmt_render.i_y_offset +
 756             (p_vout->fmt_render.i_visible_height - i_height) / 2;
 757         p_vout->fmt_in.i_visible_height = i_height;
 758     }
 759
 760  crop_end:
 761     InitWindowSize( p_vout, &p_vout->i_window_width,
 762                     &p_vout->i_window_height );
 763
 764     p_vout->i_changes |= VOUT_CROP_CHANGE;
 765
 766     msg_Dbg( p_vout, "cropping picture %ix%i to %i,%i,%ix%i",
 767              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 768              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 769              p_vout->fmt_in.i_visible_width,
 770              p_vout->fmt_in.i_visible_height );
 771
 772     return VLC_SUCCESS;
 773 }
 774
 775 static int AspectCallback( vlc_object_t *p_this, char const *psz_cmd,
 776                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 777 {
 778     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 779     unsigned int i_aspect_num, i_aspect_den, i_sar_num, i_sar_den;
 780     vlc_value_t val;
 781
 782     char *psz_end, *psz_parser = strchr( newval.psz_string, ':' );
 783
 784     /* Restore defaults */
 785     p_vout->fmt_in.i_sar_num = p_vout->fmt_render.i_sar_num;
 786     p_vout->fmt_in.i_sar_den = p_vout->fmt_render.i_sar_den;
 787     p_vout->fmt_in.i_aspect = p_vout->fmt_render.i_aspect;
 788     p_vout->render.i_aspect = p_vout->fmt_render.i_aspect;
 789
 790     if( !psz_parser ) goto aspect_end;
 791
 792     i_aspect_num = strtol( newval.psz_string, &psz_end, 0 );
 793     if( psz_end == newval.psz_string || !i_aspect_num ) goto aspect_end;
 794
 795     i_aspect_den = strtol( ++psz_parser, &psz_end, 0 );
 796     if( psz_end == psz_parser || !i_aspect_den ) goto aspect_end;
 797
 798     i_sar_num = i_aspect_num * p_vout->fmt_render.i_visible_height;
 799     i_sar_den = i_aspect_den * p_vout->fmt_render.i_visible_width;
 800     vlc_ureduce( &i_sar_num, &i_sar_den, i_sar_num, i_sar_den, 0 );
 801     p_vout->fmt_in.i_sar_num = i_sar_num;
 802     p_vout->fmt_in.i_sar_den = i_sar_den;
 803     p_vout->fmt_in.i_aspect = i_aspect_num * VOUT_ASPECT_FACTOR / i_aspect_den;
 804     p_vout->render.i_aspect = p_vout->fmt_in.i_aspect;
 805
 806  aspect_end:
 807     if( p_vout->i_par_num && p_vout->i_par_den )
 808     {
 809         p_vout->fmt_in.i_sar_num *= p_vout->i_par_den;
 810         p_vout->fmt_in.i_sar_den *= p_vout->i_par_num;
 811         p_vout->fmt_in.i_aspect = p_vout->fmt_in.i_aspect *
 812             p_vout->i_par_den / p_vout->i_par_num;
 813         p_vout->render.i_aspect = p_vout->fmt_in.i_aspect;
 814     }
 815
 816     p_vout->i_changes |= VOUT_ASPECT_CHANGE;
 817
 818     vlc_ureduce( &i_aspect_num, &i_aspect_den,
 819                  p_vout->fmt_in.i_aspect, VOUT_ASPECT_FACTOR, 0 );
 820     msg_Dbg( p_vout, "new aspect-ratio %i:%i, sample aspect-ratio %i:%i",
 821              i_aspect_num, i_aspect_den,
 822              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 823
 824     var_Get( p_vout, "crop", &val );
 825     return CropCallback( p_this, 0, val, val, 0 );
 826
 827     return VLC_SUCCESS;
 828 }
 829
 830 static int OnTopCallback( vlc_object_t *p_this, char const *psz_cmd,
 831                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 832 {
 833     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 834     playlist_t *p_playlist;
 835     vout_Control( p_vout, VOUT_SET_STAY_ON_TOP, newval.b_bool );
 836
 837     p_playlist = (playlist_t *)vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 838                                                  FIND_PARENT );
 839     if( p_playlist )
 840     {
 841         /* Modify playlist as well because the vout might have to be restarted */
 842         var_Create( p_playlist, "video-on-top", VLC_VAR_BOOL );
 843         var_Set( p_playlist, "video-on-top", newval );
 844
 845         vlc_object_release( p_playlist );
 846     }
 847     return VLC_SUCCESS;
 848 }
 849
 850 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
 851                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 852 {
 853     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 854     playlist_t *p_playlist;
 855     vlc_value_t val;
 856
 857     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 858
 859     p_playlist = (playlist_t *)vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 860                                                  FIND_PARENT );
 861     if( p_playlist )
 862     {
 863         /* Modify playlist as well because the vout might have to be restarted */
 864         var_Create( p_playlist, "fullscreen", VLC_VAR_BOOL );
 865         var_Set( p_playlist, "fullscreen", newval );
 866
 867         vlc_object_release( p_playlist );
 868     }
 869
 870     /* Disable "always on top" in fullscreen mode */
 871     var_Get( p_vout, "video-on-top", &val );
 872     if( newval.b_bool && val.b_bool )
 873     {
 874         val.b_bool = VLC_FALSE;
 875         vout_Control( p_vout, VOUT_SET_STAY_ON_TOP, val.b_bool );
 876     }
 877     else if( !newval.b_bool && val.b_bool )
 878     {
 879         vout_Control( p_vout, VOUT_SET_STAY_ON_TOP, val.b_bool );
 880     }
 881
 882     val.b_bool = VLC_TRUE;
 883     var_Set( p_vout, "intf-change", val );
 884     return VLC_SUCCESS;
 885 }
 886
 887 static int SnapshotCallback( vlc_object_t *p_this, char const *psz_cmd,
 888                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 889 {
 890     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 891     vout_Control( p_vout, VOUT_SNAPSHOT );
 892     return VLC_SUCCESS;
 893 }