git.sesse.net Git - vlc/blob - modules/video_output/sdl.c

   1 /*****************************************************************************
   2  * sdl.c: SDL video output display method
   3  *****************************************************************************
   4  * Copyright (C) 1998-2001 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Pierre Baillet <oct@zoy.org>
   9  *          Arnaud de Bossoreille de Ribou <bozo@via.ecp.fr>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <errno.h>                                                 /* ENOMEM */
  30 #include <stdlib.h>                                                /* free() */
  31 #include <string.h>                                            /* strerror() */
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc/intf.h>
  35 #include <vlc/vout.h>
  36 #include <vlc/aout.h>
  37
  38 #include <sys/types.h>
  39 #ifndef WIN32
  40 #   include <netinet/in.h>                            /* BSD: struct in_addr */
  41 #endif
  42
  43 #include SDL_INCLUDE_FILE
  44
  45 /* SDL is not able to crop overlays - so use only 1 direct buffer */
  46 #define SDL_MAX_DIRECTBUFFERS 1
  47 #define SDL_DEFAULT_BPP 16
  48
  49 /*****************************************************************************
  50  * vout_sys_t: video output SDL method descriptor
  51  *****************************************************************************
  52  * This structure is part of the video output thread descriptor.
  53  * It describes the SDL specific properties of an output thread.
  54  *****************************************************************************/
  55 struct vout_sys_t
  56 {
  57     SDL_Surface *   p_display;                             /* display device */
  58
  59     int i_width;
  60     int i_height;
  61
  62     /* For YUV output */
  63     SDL_Overlay * p_overlay;   /* An overlay we keep to grab the XVideo port */
  64
  65     /* For RGB output */
  66     int i_surfaces;
  67
  68     vlc_bool_t  b_cursor;
  69     vlc_bool_t  b_cursor_autohidden;
  70     mtime_t     i_lastmoved;
  71     mtime_t     i_lastpressed;                        /* to track dbl-clicks */
  72 };
  73
  74 /*****************************************************************************
  75  * picture_sys_t: direct buffer method descriptor
  76  *****************************************************************************
  77  * This structure is part of the picture descriptor, it describes the
  78  * SDL specific properties of a direct buffer.
  79  *****************************************************************************/
  80 struct picture_sys_t
  81 {
  82     SDL_Overlay *p_overlay;
  83 };
  84
  85 /*****************************************************************************
  86  * Local prototypes
  87  *****************************************************************************/
  88 static int  Open      ( vlc_object_t * );
  89 static void Close     ( vlc_object_t * );
  90 static int  Init      ( vout_thread_t * );
  91 static void End       ( vout_thread_t * );
  92 static int  Manage    ( vout_thread_t * );
  93 static void Display   ( vout_thread_t *, picture_t * );
  94
  95 static int  OpenDisplay     ( vout_thread_t * );
  96 static void CloseDisplay    ( vout_thread_t * );
  97 static int  NewPicture      ( vout_thread_t *, picture_t * );
  98 static void SetPalette      ( vout_thread_t *,
  99                               uint16_t *, uint16_t *, uint16_t * );
 100
 101 /*****************************************************************************
 102  * Module descriptor
 103  *****************************************************************************/
 104 vlc_module_begin();
 105     set_shortname( "SDL" );
 106     set_category( CAT_VIDEO );
 107     set_subcategory( SUBCAT_VIDEO_VOUT );
 108     set_description( _("Simple DirectMedia Layer video output") );
 109     set_capability( "video output", 60 );
 110     add_shortcut( "sdl" );
 111     set_callbacks( Open, Close );
 112     /* XXX: check for conflicts with the SDL audio output */
 113     var_Create( p_module->p_libvlc, "sdl", VLC_VAR_MUTEX );
 114 #if defined( __i386__ ) || defined( __x86_64__ )
 115     /* On i386, SDL is linked against svgalib */
 116     linked_with_a_crap_library_which_uses_atexit();
 117 #endif
 118 vlc_module_end();
 119
 120 /*****************************************************************************
 121  * OpenVideo: allocate SDL video thread output method
 122  *****************************************************************************
 123  * This function allocate and initialize a SDL vout method. It uses some of the
 124  * vout properties to choose the correct mode, and change them according to the
 125  * mode actually used.
 126  *****************************************************************************/
 127 static int Open ( vlc_object_t *p_this )
 128 {
 129     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 130     vlc_value_t lockval;
 131
 132 #ifdef HAVE_SETENV
 133     char *psz_method;
 134 #endif
 135
 136     var_Get( p_this->p_libvlc, "sdl", &lockval );
 137     vlc_mutex_lock( lockval.p_address );
 138
 139     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
 140     {
 141         vlc_mutex_unlock( lockval.p_address );
 142         return VLC_EGENERIC;
 143     }
 144
 145     /* Allocate structure */
 146     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 147     if( p_vout->p_sys == NULL )
 148     {
 149         msg_Err( p_vout, "out of memory" );
 150         vlc_mutex_unlock( lockval.p_address );
 151         return VLC_ENOMEM;
 152     }
 153
 154     p_vout->pf_init = Init;
 155     p_vout->pf_end = End;
 156     p_vout->pf_manage = Manage;
 157     p_vout->pf_render = NULL;
 158     p_vout->pf_display = Display;
 159
 160 #ifdef HAVE_SETENV
 161     psz_method = config_GetPsz( p_vout, "vout" );
 162     if( psz_method )
 163     {
 164         while( *psz_method && *psz_method != ':' )
 165         {
 166             psz_method++;
 167         }
 168
 169         if( *psz_method )
 170         {
 171             setenv( "SDL_VIDEODRIVER", psz_method + 1, 1 );
 172         }
 173     }
 174 #endif
 175
 176     /* Initialize library */
 177     if( SDL_Init( SDL_INIT_VIDEO
 178 #ifndef WIN32
 179     /* Win32 SDL implementation doesn't support SDL_INIT_EVENTTHREAD yet*/
 180                 | SDL_INIT_EVENTTHREAD
 181 #endif
 182 #ifdef DEBUG
 183     /* In debug mode you may want vlc to dump a core instead of staying
 184      * stuck */
 185                 | SDL_INIT_NOPARACHUTE
 186 #endif
 187                 ) < 0 )
 188     {
 189         msg_Err( p_vout, "cannot initialize SDL (%s)", SDL_GetError() );
 190         free( p_vout->p_sys );
 191         vlc_mutex_unlock( lockval.p_address );
 192         return VLC_EGENERIC;
 193     }
 194
 195     vlc_mutex_unlock( lockval.p_address );
 196
 197     p_vout->p_sys->b_cursor = 1;
 198     p_vout->p_sys->b_cursor_autohidden = 0;
 199     p_vout->p_sys->i_lastmoved = mdate();
 200
 201     if( OpenDisplay( p_vout ) )
 202     {
 203         msg_Err( p_vout, "cannot set up SDL (%s)", SDL_GetError() );
 204         SDL_QuitSubSystem( SDL_INIT_VIDEO );
 205         free( p_vout->p_sys );
 206         return VLC_EGENERIC;
 207     }
 208
 209     return VLC_SUCCESS;
 210 }
 211
 212 /*****************************************************************************
 213  * Init: initialize SDL video thread output method
 214  *****************************************************************************
 215  * This function initialize the SDL display device.
 216  *****************************************************************************/
 217 static int Init( vout_thread_t *p_vout )
 218 {
 219     int i_index;
 220     picture_t *p_pic;
 221
 222     p_vout->p_sys->i_surfaces = 0;
 223
 224     I_OUTPUTPICTURES = 0;
 225
 226     /* Initialize the output structure */
 227     if( p_vout->p_sys->p_overlay == NULL )
 228     {
 229         /* All we have is an RGB image with square pixels */
 230         p_vout->output.i_width  = p_vout->p_sys->i_width;
 231         p_vout->output.i_height = p_vout->p_sys->i_height;
 232         p_vout->output.i_aspect = p_vout->output.i_width
 233                                    * VOUT_ASPECT_FACTOR
 234                                    / p_vout->output.i_height;
 235     }
 236     else
 237     {
 238         /* We may need to convert the chroma, but at least we keep the
 239          * aspect ratio */
 240         p_vout->output.i_width  = p_vout->render.i_width;
 241         p_vout->output.i_height = p_vout->render.i_height;
 242         p_vout->output.i_aspect = p_vout->render.i_aspect;
 243     }
 244
 245     /* Try to initialize SDL_MAX_DIRECTBUFFERS direct buffers */
 246     while( I_OUTPUTPICTURES < SDL_MAX_DIRECTBUFFERS )
 247     {
 248         p_pic = NULL;
 249
 250         /* Find an empty picture slot */
 251         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 252         {
 253             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 254             {
 255                 p_pic = p_vout->p_picture + i_index;
 256                 break;
 257             }
 258         }
 259
 260         /* Allocate the picture if we found one */
 261         if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 262         {
 263             break;
 264         }
 265
 266         p_pic->i_status = DESTROYED_PICTURE;
 267         p_pic->i_type   = DIRECT_PICTURE;
 268
 269         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 270
 271         I_OUTPUTPICTURES++;
 272     }
 273
 274     return VLC_SUCCESS;
 275 }
 276
 277 /*****************************************************************************
 278  * End: terminate Sys video thread output method
 279  *****************************************************************************
 280  * Terminate an output method created by OpenVideo
 281  *****************************************************************************/
 282 static void End( vout_thread_t *p_vout )
 283 {
 284     int i_index;
 285
 286     /* Free the output buffers we allocated */
 287     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 288     {
 289         i_index--;
 290         if( p_vout->p_sys->p_overlay == NULL )
 291         {
 292             /* RGB picture */
 293         }
 294         else
 295         {
 296             SDL_UnlockYUVOverlay(
 297                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 298             SDL_FreeYUVOverlay(
 299                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 300         }
 301         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 302     }
 303 }
 304
 305 /*****************************************************************************
 306  * CloseVideo: destroy Sys video thread output method
 307  *****************************************************************************
 308  * Terminate an output method created by vout_SDLCreate
 309  *****************************************************************************/
 310 static void Close ( vlc_object_t *p_this )
 311 {
 312     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 313
 314     CloseDisplay( p_vout );
 315     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 316
 317     free( p_vout->p_sys );
 318 }
 319
 320 /*****************************************************************************
 321  * Manage: handle Sys events
 322  *****************************************************************************
 323  * This function should be called regularly by video output thread. It returns
 324  * a non null value if an error occurred.
 325  *****************************************************************************/
 326 static int Manage( vout_thread_t *p_vout )
 327 {
 328     SDL_Event event;                                            /* SDL event */
 329     vlc_value_t val;
 330     int i_width, i_height, i_x, i_y;
 331
 332     /* Process events */
 333     while( SDL_PollEvent(&event) )
 334     {
 335         switch( event.type )
 336         {
 337         case SDL_VIDEORESIZE:                          /* Resizing of window */
 338             /* Update dimensions */
 339             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 340             p_vout->i_window_width = p_vout->p_sys->i_width = event.resize.w;
 341             p_vout->i_window_height = p_vout->p_sys->i_height = event.resize.h;
 342             break;
 343
 344         case SDL_MOUSEMOTION:
 345             vout_PlacePicture( p_vout, p_vout->p_sys->i_width,
 346                                p_vout->p_sys->i_height,
 347                                &i_x, &i_y, &i_width, &i_height );
 348
 349             val.i_int = ( event.motion.x - i_x )
 350                          * p_vout->render.i_width / i_width;
 351             var_Set( p_vout, "mouse-x", val );
 352             val.i_int = ( event.motion.y - i_y )
 353                          * p_vout->render.i_height / i_height;
 354             var_Set( p_vout, "mouse-y", val );
 355
 356             val.b_bool = VLC_TRUE;
 357             var_Set( p_vout, "mouse-moved", val );
 358
 359             if( p_vout->p_sys->b_cursor &&
 360                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 361             {
 362                 if( p_vout->p_sys->b_cursor_autohidden )
 363                 {
 364                     p_vout->p_sys->b_cursor_autohidden = 0;
 365                     SDL_ShowCursor( 1 );
 366                 }
 367                 else
 368                 {
 369                     p_vout->p_sys->i_lastmoved = mdate();
 370                 }
 371             }
 372             break;
 373
 374         case SDL_MOUSEBUTTONUP:
 375             switch( event.button.button )
 376             {
 377             case SDL_BUTTON_LEFT:
 378                 val.b_bool = VLC_TRUE;
 379                 var_Set( p_vout, "mouse-clicked", val );
 380                 break;
 381
 382             case SDL_BUTTON_RIGHT:
 383                 {
 384                     intf_thread_t *p_intf;
 385                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 386                                                       FIND_ANYWHERE );
 387                     if( p_intf )
 388                     {
 389                         p_intf->b_menu_change = 1;
 390                         vlc_object_release( p_intf );
 391                     }
 392                 }
 393                 break;
 394             }
 395             break;
 396
 397         case SDL_MOUSEBUTTONDOWN:
 398             switch( event.button.button )
 399             {
 400             case SDL_BUTTON_LEFT:
 401                 /* In this part we will eventually manage
 402                  * clicks for DVD navigation for instance. */
 403
 404                 /* detect double-clicks */
 405                 if( ( mdate() - p_vout->p_sys->i_lastpressed ) < 300000 )
 406                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 407
 408                 p_vout->p_sys->i_lastpressed = mdate();
 409                 break;
 410
 411             case 4:
 412                 break;
 413
 414             case 5:
 415                 break;
 416             }
 417             break;
 418
 419         case SDL_QUIT:
 420             p_vout->p_vlc->b_die = 1;
 421             break;
 422
 423         case SDL_KEYDOWN:                             /* if a key is pressed */
 424
 425             switch( event.key.keysym.sym )
 426             {
 427             case SDLK_ESCAPE:
 428                 if( p_vout->b_fullscreen )
 429                 {
 430                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 431                 }
 432                 else
 433                 {
 434                     p_vout->p_vlc->b_die = 1;
 435                 }
 436                 break;
 437
 438             case SDLK_q:                                             /* quit */
 439                 p_vout->p_vlc->b_die = 1;
 440                 break;
 441
 442             case SDLK_f:                             /* switch to fullscreen */
 443                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 444                 break;
 445
 446             case SDLK_c:                                 /* toggle grayscale */
 447                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 448                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 449                 break;
 450
 451             case SDLK_i:                                      /* toggle info */
 452                 p_vout->b_info = ! p_vout->b_info;
 453                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 454                 break;
 455
 456             case SDLK_s:                                   /* toggle scaling */
 457                 p_vout->b_scale = ! p_vout->b_scale;
 458                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 459                 break;
 460
 461             case SDLK_SPACE:                             /* toggle interface */
 462                 p_vout->b_interface = ! p_vout->b_interface;
 463                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 464                 break;
 465
 466             case SDLK_MENU:
 467                 {
 468                     intf_thread_t *p_intf;
 469                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 470                                                       FIND_ANYWHERE );
 471                     if( p_intf != NULL )
 472                     {
 473                         p_intf->b_menu_change = 1;
 474                         vlc_object_release( p_intf );
 475                     }
 476                 }
 477                 break;
 478
 479             case SDLK_LEFT:
 480                 break;
 481
 482             case SDLK_RIGHT:
 483                 break;
 484
 485             case SDLK_UP:
 486                 break;
 487
 488             case SDLK_DOWN:
 489                 break;
 490
 491             case SDLK_b:
 492                 {
 493                     audio_volume_t i_volume;
 494                     if ( !aout_VolumeDown( p_vout, 1, &i_volume ) )
 495                     {
 496                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 497                     }
 498                     else
 499                     {
 500                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 501                     }
 502                 }
 503                 break;
 504
 505             case SDLK_n:
 506                 {
 507                     audio_volume_t i_volume;
 508                     if ( !aout_VolumeUp( p_vout, 1, &i_volume ) )
 509                     {
 510                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 511                     }
 512                     else
 513                     {
 514                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 515                     }
 516                 }
 517                 break;
 518
 519              default:
 520                 break;
 521             }
 522             break;
 523
 524         default:
 525             break;
 526         }
 527     }
 528
 529     /* Fullscreen change */
 530     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 531     {
 532         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 533
 534         p_vout->p_sys->b_cursor_autohidden = 0;
 535         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 536                         ! p_vout->p_sys->b_cursor_autohidden );
 537
 538         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 539         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 540     }
 541
 542     /*
 543      * Size change
 544      */
 545     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 546     {
 547         msg_Dbg( p_vout, "video display resized (%dx%d)",
 548                  p_vout->p_sys->i_width, p_vout->p_sys->i_height );
 549
 550         CloseDisplay( p_vout );
 551         OpenDisplay( p_vout );
 552
 553         /* We don't need to signal the vout thread about the size change if
 554          * we can handle rescaling ourselves */
 555         if( p_vout->p_sys->p_overlay != NULL )
 556             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 557
 558     }
 559
 560     /* Pointer change */
 561     if( ! p_vout->p_sys->b_cursor_autohidden &&
 562         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 563     {
 564         /* Hide the mouse automatically */
 565         p_vout->p_sys->b_cursor_autohidden = 1;
 566         SDL_ShowCursor( 0 );
 567     }
 568
 569     return VLC_SUCCESS;
 570 }
 571
 572 /*****************************************************************************
 573  * Display: displays previously rendered output
 574  *****************************************************************************
 575  * This function sends the currently rendered image to the display.
 576  *****************************************************************************/
 577 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 578 {
 579     int x, y, w, h;
 580     SDL_Rect disp;
 581
 582     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 583                        &x, &y, &w, &h );
 584     disp.x = x;
 585     disp.y = y;
 586     disp.w = w;
 587     disp.h = h;
 588
 589     if( p_vout->p_sys->p_overlay == NULL )
 590     {
 591         /* RGB picture */
 592         SDL_Flip( p_vout->p_sys->p_display );
 593     }
 594     else
 595     {
 596         /* Overlay picture */
 597         SDL_UnlockYUVOverlay( p_pic->p_sys->p_overlay);
 598         SDL_DisplayYUVOverlay( p_pic->p_sys->p_overlay , &disp );
 599         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay);
 600     }
 601 }
 602
 603 /* following functions are local */
 604
 605 /*****************************************************************************
 606  * OpenDisplay: open and initialize SDL device
 607  *****************************************************************************
 608  * Open and initialize display according to preferences specified in the vout
 609  * thread fields.
 610  *****************************************************************************/
 611 static int OpenDisplay( vout_thread_t *p_vout )
 612 {
 613     uint32_t i_flags;
 614     int i_bpp;
 615
 616     /* SDL fucked up fourcc definitions on bigendian machines */
 617     uint32_t i_sdl_chroma;
 618
 619     /* Set main window's size */
 620     p_vout->p_sys->i_width = p_vout->b_fullscreen ? p_vout->output.i_width :
 621                                                     p_vout->i_window_width;
 622     p_vout->p_sys->i_height = p_vout->b_fullscreen ? p_vout->output.i_height :
 623                                                      p_vout->i_window_height;
 624
 625     /* Initialize flags and cursor */
 626     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE | SDL_DOUBLEBUF;
 627     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 628
 629     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 630                              SDL_DEFAULT_BPP, i_flags );
 631     if( i_bpp == 0 )
 632     {
 633         msg_Err( p_vout, "no video mode available" );
 634         return VLC_EGENERIC;
 635     }
 636
 637     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 638                                                  p_vout->p_sys->i_height,
 639                                                  i_bpp, i_flags );
 640
 641     if( p_vout->p_sys->p_display == NULL )
 642     {
 643         msg_Err( p_vout, "cannot set video mode" );
 644         return VLC_EGENERIC;
 645     }
 646
 647     SDL_LockSurface( p_vout->p_sys->p_display );
 648
 649     /* Choose the chroma we will try first. */
 650     switch( p_vout->render.i_chroma )
 651     {
 652         case VLC_FOURCC('Y','U','Y','2'):
 653         case VLC_FOURCC('Y','U','N','V'):
 654             p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 655             i_sdl_chroma = SDL_YUY2_OVERLAY;
 656             break;
 657         case VLC_FOURCC('U','Y','V','Y'):
 658         case VLC_FOURCC('U','Y','N','V'):
 659         case VLC_FOURCC('Y','4','2','2'):
 660             p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 661             i_sdl_chroma = SDL_UYVY_OVERLAY;
 662             break;
 663         case VLC_FOURCC('Y','V','Y','U'):
 664             p_vout->output.i_chroma = VLC_FOURCC('Y','V','Y','U');
 665             i_sdl_chroma = SDL_YVYU_OVERLAY;
 666             break;
 667         case VLC_FOURCC('Y','V','1','2'):
 668         case VLC_FOURCC('I','4','2','0'):
 669         case VLC_FOURCC('I','Y','U','V'):
 670         default:
 671             p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 672             i_sdl_chroma = SDL_YV12_OVERLAY;
 673             break;
 674     }
 675
 676     p_vout->p_sys->p_overlay =
 677         SDL_CreateYUVOverlay( 32, 32, i_sdl_chroma, p_vout->p_sys->p_display );
 678     /* FIXME: if the first overlay we find is software, don't stop,
 679      * because we may find a hardware one later ... */
 680
 681     /* If this best choice failed, fall back to other chromas */
 682     if( p_vout->p_sys->p_overlay == NULL )
 683     {
 684         p_vout->output.i_chroma = VLC_FOURCC('I','Y','U','V');
 685         p_vout->p_sys->p_overlay =
 686             SDL_CreateYUVOverlay( 32, 32, SDL_IYUV_OVERLAY,
 687                                   p_vout->p_sys->p_display );
 688     }
 689
 690     if( p_vout->p_sys->p_overlay == NULL )
 691     {
 692         p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 693         p_vout->p_sys->p_overlay =
 694             SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 695                                   p_vout->p_sys->p_display );
 696     }
 697
 698     if( p_vout->p_sys->p_overlay == NULL )
 699     {
 700         p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 701         p_vout->p_sys->p_overlay =
 702             SDL_CreateYUVOverlay( 32, 32, SDL_YUY2_OVERLAY,
 703                                   p_vout->p_sys->p_display );
 704     }
 705
 706     if( p_vout->p_sys->p_overlay == NULL )
 707     {
 708         msg_Warn( p_vout, "no SDL overlay for 0x%.8x (%4.4s)",
 709                   p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma );
 710
 711         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 712         {
 713             case 8:
 714                 p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
 715                 p_vout->output.pf_setpalette = SetPalette;
 716                 break;
 717             case 15:
 718                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5');
 719                 break;
 720             case 16:
 721                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 722                 break;
 723             case 24:
 724                 p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 725                 break;
 726             case 32:
 727                 p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 728                 break;
 729             default:
 730                 msg_Err( p_vout, "unknown screen depth %i",
 731                          p_vout->p_sys->p_display->format->BitsPerPixel );
 732                 SDL_UnlockSurface( p_vout->p_sys->p_display );
 733                 SDL_FreeSurface( p_vout->p_sys->p_display );
 734                 return VLC_EGENERIC;
 735         }
 736
 737         p_vout->output.i_rmask = p_vout->p_sys->p_display->format->Rmask;
 738         p_vout->output.i_gmask = p_vout->p_sys->p_display->format->Gmask;
 739         p_vout->output.i_bmask = p_vout->p_sys->p_display->format->Bmask;
 740
 741         SDL_WM_SetCaption( VOUT_TITLE " (software RGB SDL output)",
 742                            VOUT_TITLE " (software RGB SDL output)" );
 743     }
 744     else
 745     {
 746         if( p_vout->p_sys->p_overlay->hw_overlay )
 747         {
 748             SDL_WM_SetCaption( VOUT_TITLE " (hardware YUV SDL output)",
 749                                VOUT_TITLE " (hardware YUV SDL output)" );
 750         }
 751         else
 752         {
 753             SDL_WM_SetCaption( VOUT_TITLE " (software YUV SDL output)",
 754                                VOUT_TITLE " (software YUV SDL output)" );
 755         }
 756     }
 757
 758     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 759
 760     return VLC_SUCCESS;
 761 }
 762
 763 /*****************************************************************************
 764  * CloseDisplay: close and reset SDL device
 765  *****************************************************************************
 766  * This function returns all resources allocated by OpenDisplay and restore
 767  * the original state of the device.
 768  *****************************************************************************/
 769 static void CloseDisplay( vout_thread_t *p_vout )
 770 {
 771     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 772     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 773     SDL_FreeSurface( p_vout->p_sys->p_display );
 774 }
 775
 776 /*****************************************************************************
 777  * NewPicture: allocate a picture
 778  *****************************************************************************
 779  * Returns 0 on success, -1 otherwise
 780  *****************************************************************************/
 781 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 782 {
 783     int i_width  = p_vout->output.i_width;
 784     int i_height = p_vout->output.i_height;
 785
 786     if( p_vout->p_sys->p_overlay == NULL )
 787     {
 788         /* RGB picture */
 789         if( p_vout->p_sys->i_surfaces )
 790         {
 791             /* We already allocated this surface, return */
 792             return VLC_EGENERIC;
 793         }
 794
 795         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 796
 797         if( p_pic->p_sys == NULL )
 798         {
 799             return VLC_ENOMEM;
 800         }
 801
 802         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 803         {
 804             case 8:
 805                 p_pic->p->i_pixel_pitch = 1;
 806                 break;
 807             case 15:
 808             case 16:
 809                 p_pic->p->i_pixel_pitch = 2;
 810                 break;
 811             case 24:
 812             case 32:
 813                 p_pic->p->i_pixel_pitch = 4;
 814                 break;
 815             default:
 816                 return VLC_EGENERIC;
 817         }
 818
 819         p_pic->p->p_pixels = p_vout->p_sys->p_display->pixels;
 820         p_pic->p->i_lines = p_vout->p_sys->p_display->h;
 821         p_pic->p->i_visible_lines = p_vout->p_sys->p_display->h;
 822         p_pic->p->i_pitch = p_vout->p_sys->p_display->pitch;
 823         p_pic->p->i_visible_pitch =
 824             p_pic->p->i_pixel_pitch * p_vout->p_sys->p_display->w;
 825
 826         p_vout->p_sys->i_surfaces++;
 827
 828         p_pic->i_planes = 1;
 829     }
 830     else
 831     {
 832         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 833
 834         if( p_pic->p_sys == NULL )
 835         {
 836             return VLC_ENOMEM;
 837         }
 838
 839         p_pic->p_sys->p_overlay =
 840             SDL_CreateYUVOverlay( i_width, i_height,
 841                                   p_vout->output.i_chroma,
 842                                   p_vout->p_sys->p_display );
 843
 844         if( p_pic->p_sys->p_overlay == NULL )
 845         {
 846             free( p_pic->p_sys );
 847             return VLC_EGENERIC;
 848         }
 849
 850         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 851
 852         p_pic->Y_PIXELS = p_pic->p_sys->p_overlay->pixels[0];
 853         p_pic->p[Y_PLANE].i_lines = p_pic->p_sys->p_overlay->h;
 854         p_pic->p[Y_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h;
 855         p_pic->p[Y_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[0];
 856
 857         switch( p_vout->output.i_chroma )
 858         {
 859         case SDL_YV12_OVERLAY:
 860             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 861             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 862
 863             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 864             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 865             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 866             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 867             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 868             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 869
 870             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 871             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 872             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 873             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 874             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 875             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 876
 877             p_pic->i_planes = 3;
 878             break;
 879
 880         case SDL_IYUV_OVERLAY:
 881             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 882             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 883
 884             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 885             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 886             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 887             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 888             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 889             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 890
 891             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 892             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 893             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 894             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 895             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 896             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 897
 898             p_pic->i_planes = 3;
 899             break;
 900
 901         default:
 902             p_pic->p[Y_PLANE].i_pixel_pitch = 2;
 903             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w * 2;
 904
 905             p_pic->i_planes = 1;
 906             break;
 907         }
 908     }
 909
 910     return VLC_SUCCESS;
 911 }
 912
 913 /*****************************************************************************
 914  * SetPalette: sets an 8 bpp palette
 915  *****************************************************************************/
 916 static void SetPalette( vout_thread_t *p_vout,
 917                         uint16_t *red, uint16_t *green, uint16_t *blue )
 918 {
 919     SDL_Color colors[256];
 920     int i;
 921
 922     /* Fill colors with color information */
 923     for( i = 0; i < 256; i++ )
 924     {
 925         colors[ i ].r = red[ i ] >> 8;
 926         colors[ i ].g = green[ i ] >> 8;
 927         colors[ i ].b = blue[ i ] >> 8;
 928     }
 929
 930     /* Set palette */
 931     if( SDL_SetColors( p_vout->p_sys->p_display, colors, 0, 256 ) == 0 )
 932     {
 933         msg_Err( p_vout, "failed setting palette" );
 934     }
 935 }
 936