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 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                                /* free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/intf.h>
  31
  32 #include "vlc_video.h"
  33 #include "video_output.h"
  34 #include "vlc_image.h"
  35 #include "vlc_spu.h"
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40
  41 /* Object variables callbacks */
  42 static int ZoomCallback( vlc_object_t *, char const *,
  43                          vlc_value_t, vlc_value_t, void * );
  44 static int OnTopCallback( vlc_object_t *, char const *,
  45                           vlc_value_t, vlc_value_t, void * );
  46 static int FullscreenCallback( vlc_object_t *, char const *,
  47                                vlc_value_t, vlc_value_t, void * );
  48 static int SnapshotCallback( vlc_object_t *, char const *,
  49                              vlc_value_t, vlc_value_t, void * );
  50
  51 /*****************************************************************************
  52  * vout_RequestWindow: Create/Get a video window if possible.
  53  *****************************************************************************
  54  * This function looks for the main interface and tries to request
  55  * a new video window. If it fails then the vout will still need to create the
  56  * window by itself.
  57  *****************************************************************************/
  58 void *vout_RequestWindow( vout_thread_t *p_vout,
  59                           int *pi_x_hint, int *pi_y_hint,
  60                           unsigned int *pi_width_hint,
  61                           unsigned int *pi_height_hint )
  62 {
  63     intf_thread_t *p_intf = NULL;
  64     vlc_list_t *p_list;
  65     void *p_window;
  66     vlc_value_t val;
  67     int i;
  68
  69     /* Small kludge */
  70     if( !var_Type( p_vout, "aspect-ratio" ) ) vout_IntfInit( p_vout );
  71
  72     /* Get requested coordinates */
  73     var_Get( p_vout, "video-x", &val );
  74     *pi_x_hint = val.i_int ;
  75     var_Get( p_vout, "video-y", &val );
  76     *pi_y_hint = val.i_int;
  77
  78     *pi_width_hint = p_vout->i_window_width;
  79     *pi_height_hint = p_vout->i_window_height;
  80
  81     /* Check whether someone provided us with a window ID */
  82     var_Get( p_vout->p_vlc, "drawable", &val );
  83     if( val.i_int ) return (void *)val.i_int;
  84
  85     /* Find if the main interface supports embedding */
  86     p_list = vlc_list_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
  87     if( !p_list ) return NULL;
  88
  89     for( i = 0; i < p_list->i_count; i++ )
  90     {
  91         p_intf = (intf_thread_t *)p_list->p_values[i].p_object;
  92         if( p_intf->b_block && p_intf->pf_request_window ) break;
  93         p_intf = NULL;
  94     }
  95
  96     if( !p_intf )
  97     {
  98         vlc_list_release( p_list );
  99         return NULL;
 100     }
 101
 102     vlc_object_yield( p_intf );
 103     vlc_list_release( p_list );
 104
 105     p_window = p_intf->pf_request_window( p_intf, p_vout, pi_x_hint, pi_y_hint,
 106                                           pi_width_hint, pi_height_hint );
 107
 108     if( !p_window ) vlc_object_release( p_intf );
 109     else p_vout->p_parent_intf = p_intf;
 110
 111     return p_window;
 112 }
 113
 114 void vout_ReleaseWindow( vout_thread_t *p_vout, void *p_window )
 115 {
 116     intf_thread_t *p_intf = p_vout->p_parent_intf;
 117
 118     if( !p_intf ) return;
 119
 120     vlc_mutex_lock( &p_intf->object_lock );
 121     if( p_intf->b_dead )
 122     {
 123         vlc_mutex_unlock( &p_intf->object_lock );
 124         return;
 125     }
 126
 127     if( !p_intf->pf_release_window )
 128     {
 129         msg_Err( p_vout, "no pf_release_window");
 130         vlc_mutex_unlock( &p_intf->object_lock );
 131         vlc_object_release( p_intf );
 132         return;
 133     }
 134
 135     p_intf->pf_release_window( p_intf, p_window );
 136
 137     p_vout->p_parent_intf = NULL;
 138     vlc_mutex_unlock( &p_intf->object_lock );
 139     vlc_object_release( p_intf );
 140 }
 141
 142 int vout_ControlWindow( vout_thread_t *p_vout, void *p_window,
 143                         int i_query, va_list args )
 144 {
 145     intf_thread_t *p_intf = p_vout->p_parent_intf;
 146     int i_ret;
 147
 148     if( !p_intf ) return VLC_EGENERIC;
 149
 150     vlc_mutex_lock( &p_intf->object_lock );
 151     if( p_intf->b_dead )
 152     {
 153         vlc_mutex_unlock( &p_intf->object_lock );
 154         return VLC_EGENERIC;
 155     }
 156
 157     if( !p_intf->pf_control_window )
 158     {
 159         msg_Err( p_vout, "no pf_control_window");
 160         vlc_mutex_unlock( &p_intf->object_lock );
 161         return VLC_EGENERIC;
 162     }
 163
 164     i_ret = p_intf->pf_control_window( p_intf, p_window, i_query, args );
 165     vlc_mutex_unlock( &p_intf->object_lock );
 166     return i_ret;
 167 }
 168
 169 /*****************************************************************************
 170  * vout_IntfInit: called during the vout creation to initialise misc things.
 171  *****************************************************************************/
 172 void vout_IntfInit( vout_thread_t *p_vout )
 173 {
 174     vlc_value_t val, text, old_val;
 175
 176     /* Create a few object variables we'll need later on */
 177     var_Create( p_vout, "snapshot-path", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 178     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 179     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 180     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 181     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 182     var_Create( p_vout, "video-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 183     var_Create( p_vout, "video-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 184
 185     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_ISCOMMAND |
 186                 VLC_VAR_HASCHOICE | VLC_VAR_DOINHERIT );
 187
 188     text.psz_string = _("Zoom");
 189     var_Change( p_vout, "zoom", VLC_VAR_SETTEXT, &text, NULL );
 190
 191     var_Get( p_vout, "zoom", &old_val );
 192     if( old_val.f_float == 0.25 ||
 193         old_val.f_float == 0.5 ||
 194         old_val.f_float == 1 ||
 195         old_val.f_float == 2 )
 196     {
 197         var_Change( p_vout, "zoom", VLC_VAR_DELCHOICE, &old_val, NULL );
 198     }
 199
 200     val.f_float = 0.25; text.psz_string = _("1:4 Quarter");
 201     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 202     val.f_float = 0.5; text.psz_string = _("1:2 Half");
 203     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 204     val.f_float = 1; text.psz_string = _("1:1 Original");
 205     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 206     val.f_float = 2; text.psz_string = _("2:1 Double");
 207     var_Change( p_vout, "zoom", VLC_VAR_ADDCHOICE, &val, &text );
 208
 209     var_Set( p_vout, "zoom", old_val );
 210
 211     var_AddCallback( p_vout, "zoom", ZoomCallback, NULL );
 212
 213     /* Add a variable to indicate if the window should be on top of others */
 214     var_Create( p_vout, "video-on-top", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 215     text.psz_string = _("Always on top");
 216     var_Change( p_vout, "video-on-top", VLC_VAR_SETTEXT, &text, NULL );
 217     var_AddCallback( p_vout, "video-on-top", OnTopCallback, NULL );
 218
 219     /* Add a variable to indicate whether we want window decoration or not */
 220     var_Create( p_vout, "video-deco", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 221
 222     /* Add a fullscreen variable */
 223     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
 224     text.psz_string = _("Fullscreen");
 225     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 226     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 227     if( val.b_bool )
 228     {
 229         /* user requested fullscreen */
 230         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 231     }
 232     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 233
 234     /* Add a snapshot variable */
 235     var_Create( p_vout, "video-snapshot", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
 236     text.psz_string = _("Snapshot");
 237     var_Change( p_vout, "video-snapshot", VLC_VAR_SETTEXT, &text, NULL );
 238     var_AddCallback( p_vout, "video-snapshot", SnapshotCallback, NULL );
 239
 240     /* Mouse coordinates */
 241     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 242     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 243     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 244     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 245     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 246
 247     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 248     val.b_bool = VLC_TRUE;
 249     var_Set( p_vout, "intf-change", val );
 250 }
 251
 252 /*****************************************************************************
 253  * vout_Snapshot: generates a snapshot.
 254  *****************************************************************************/
 255 int vout_Snapshot( vout_thread_t *p_vout, picture_t *p_pic )
 256 {
 257     image_handler_t *p_image = image_HandlerCreate( p_vout );
 258     video_format_t fmt_in = {0}, fmt_out = {0};
 259     char *psz_filename;
 260     subpicture_t *p_subpic;
 261     picture_t *p_pif;
 262     vlc_value_t val;
 263     int i_ret;
 264
 265     var_Get( p_vout, "snapshot-path", &val );
 266     if( val.psz_string && !*val.psz_string )
 267     {
 268         free( val.psz_string );
 269         val.psz_string = 0;
 270     }
 271     if( !val.psz_string && p_vout->p_vlc->psz_homedir )
 272     {
 273         asprintf( &val.psz_string, "%s/" CONFIG_DIR,
 274                   p_vout->p_vlc->psz_homedir );
 275     }
 276     if( !val.psz_string )
 277     {
 278         msg_Err( p_vout, "no directory specified for snapshots" );
 279         return VLC_EGENERIC;
 280     }
 281
 282     asprintf( &psz_filename, "%s/vlcsnap-%u.png", val.psz_string,
 283               (unsigned int)(p_pic->date / 100000) & 0xFFFFFF );
 284     free( val.psz_string );
 285
 286     /* Save the snapshot */
 287     fmt_in.i_chroma = p_vout->render.i_chroma;
 288     fmt_in.i_width = p_vout->render.i_width;
 289     fmt_in.i_height = p_vout->render.i_height;
 290     i_ret = image_WriteUrl( p_image, p_pic, &fmt_in, &fmt_out, psz_filename );
 291     if( i_ret != VLC_SUCCESS )
 292     {
 293         msg_Err( p_vout, "could not create snapshot %s", psz_filename );
 294         free( psz_filename );
 295         image_HandlerDelete( p_image );
 296         return VLC_EGENERIC;
 297     }
 298
 299     msg_Dbg( p_vout, "snapshot taken (%s)", psz_filename );
 300     free( psz_filename );
 301
 302     /* Inject a subpicture with the snapshot */
 303     fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 304     fmt_out.i_width = fmt_out.i_visible_width = p_vout->render.i_width;
 305     fmt_out.i_height = fmt_out.i_visible_height = p_vout->render.i_height;
 306     fmt_out.i_aspect = VOUT_ASPECT_FACTOR;
 307     p_pif = image_Convert( p_image, p_pic, &fmt_in, &fmt_out );
 308     image_HandlerDelete( p_image );
 309     if( !p_pif ) return VLC_EGENERIC;
 310
 311     p_subpic = spu_CreateSubpicture( p_vout->p_spu );
 312     if( p_subpic == NULL )
 313     {
 314          p_pif->pf_release( p_pif );
 315          return VLC_EGENERIC;
 316     }
 317
 318     p_subpic->i_channel = 0;
 319     p_subpic->i_start = mdate();
 320     p_subpic->i_stop = mdate() + 4000000;
 321     p_subpic->b_ephemer = VLC_TRUE;
 322     p_subpic->b_fade = VLC_TRUE;
 323     p_subpic->i_original_picture_width = p_vout->render.i_width * 4;
 324     p_subpic->i_original_picture_height = p_vout->render.i_height * 4;
 325
 326     p_subpic->p_region = spu_CreateRegion( p_vout->p_spu, &fmt_out );
 327     vout_CopyPicture( p_image->p_parent, &p_subpic->p_region->picture, p_pif );
 328     p_pif->pf_release( p_pif );
 329
 330     spu_DisplaySubpicture( p_vout->p_spu, p_subpic );
 331
 332     return VLC_SUCCESS;
 333 }
 334
 335 /*****************************************************************************
 336  * vout_ControlDefault: default methods for video output control.
 337  *****************************************************************************/
 338 int vout_vaControlDefault( vout_thread_t *p_vout, int i_query, va_list args )
 339 {
 340     switch( i_query )
 341     {
 342     case VOUT_REPARENT:
 343     case VOUT_CLOSE:
 344         if( p_vout->p_parent_intf )
 345         {
 346             vlc_object_release( p_vout->p_parent_intf );
 347             p_vout->p_parent_intf = NULL;
 348         }
 349         return VLC_SUCCESS;
 350         break;
 351
 352     case VOUT_SNAPSHOT:
 353         p_vout->b_snapshot = VLC_TRUE;
 354         return VLC_SUCCESS;
 355         break;
 356
 357     default:
 358         msg_Dbg( p_vout, "control query not supported" );
 359         return VLC_EGENERIC;
 360     }
 361 }
 362
 363 /*****************************************************************************
 364  * Object variables callbacks
 365  *****************************************************************************/
 366 static int ZoomCallback( vlc_object_t *p_this, char const *psz_cmd,
 367                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 368 {
 369     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 370     vout_Control( p_vout, VOUT_SET_ZOOM, newval.f_float );
 371     return VLC_SUCCESS;
 372 }
 373
 374 static int OnTopCallback( vlc_object_t *p_this, char const *psz_cmd,
 375                          vlc_value_t oldval, vlc_value_t newval, void *p_data )
 376 {
 377     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 378     playlist_t *p_playlist;
 379     vout_Control( p_vout, VOUT_SET_STAY_ON_TOP, newval.b_bool );
 380
 381     p_playlist = (playlist_t *)vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 382                                                  FIND_PARENT );
 383     if( p_playlist )
 384     {
 385         /* Modify playlist as well because the vout might have to be restarted */
 386         var_Create( p_playlist, "video-on-top", VLC_VAR_BOOL );
 387         var_Set( p_playlist, "video-on-top", newval );
 388
 389         vlc_object_release( p_playlist );
 390     }
 391     return VLC_SUCCESS;
 392 }
 393
 394 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
 395                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 396 {
 397     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 398     playlist_t *p_playlist;
 399     vlc_value_t val;
 400
 401     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 402
 403     p_playlist = (playlist_t *)vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
 404                                                  FIND_PARENT );
 405     if( p_playlist )
 406     {
 407         /* Modify playlist as well because the vout might have to be restarted */
 408         var_Create( p_playlist, "fullscreen", VLC_VAR_BOOL );
 409         var_Set( p_playlist, "fullscreen", newval );
 410
 411         vlc_object_release( p_playlist );
 412     }
 413
 414     /* Disable "always on top" in fullscreen mode */
 415     var_Get( p_vout, "video-on-top", &val );
 416     if( newval.b_bool && val.b_bool )
 417     {
 418         val.b_bool = VLC_FALSE;
 419         vout_Control( p_vout, VOUT_SET_STAY_ON_TOP, val.b_bool );
 420     }
 421     else if( !newval.b_bool && val.b_bool )
 422     {
 423         vout_Control( p_vout, VOUT_SET_STAY_ON_TOP, val.b_bool );
 424     }
 425
 426     val.b_bool = VLC_TRUE;
 427     var_Set( p_vout, "intf-change", val );
 428     return VLC_SUCCESS;
 429 }
 430
 431 static int SnapshotCallback( vlc_object_t *p_this, char const *psz_cmd,
 432                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 433 {
 434     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 435     vout_Control( p_vout, VOUT_SNAPSHOT );
 436     return VLC_SUCCESS;
 437 }