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 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, 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 #define SDL_MAX_DIRECTBUFFERS 10
  46 #define SDL_DEFAULT_BPP 16
  47
  48 /*****************************************************************************
  49  * vout_sys_t: video output SDL method descriptor
  50  *****************************************************************************
  51  * This structure is part of the video output thread descriptor.
  52  * It describes the SDL specific properties of an output thread.
  53  *****************************************************************************/
  54 struct vout_sys_t
  55 {
  56     SDL_Surface *   p_display;                             /* display device */
  57
  58     int i_width;
  59     int i_height;
  60
  61     /* For YUV output */
  62     SDL_Overlay * p_overlay;   /* An overlay we keep to grab the XVideo port */
  63
  64     /* For RGB output */
  65     int i_surfaces;
  66
  67     vlc_bool_t  b_cursor;
  68     vlc_bool_t  b_cursor_autohidden;
  69     mtime_t     i_lastmoved;
  70     mtime_t     i_lastpressed;                        /* to track dbl-clicks */
  71 };
  72
  73 /*****************************************************************************
  74  * picture_sys_t: direct buffer method descriptor
  75  *****************************************************************************
  76  * This structure is part of the picture descriptor, it describes the
  77  * SDL specific properties of a direct buffer.
  78  *****************************************************************************/
  79 struct picture_sys_t
  80 {
  81     SDL_Overlay *p_overlay;
  82 };
  83
  84 /*****************************************************************************
  85  * Local prototypes
  86  *****************************************************************************/
  87 static int  Open      ( vlc_object_t * );
  88 static void Close     ( vlc_object_t * );
  89 static int  Init      ( vout_thread_t * );
  90 static void End       ( vout_thread_t * );
  91 static int  Manage    ( vout_thread_t * );
  92 static void Display   ( vout_thread_t *, picture_t * );
  93
  94 static int  OpenDisplay     ( vout_thread_t * );
  95 static void CloseDisplay    ( vout_thread_t * );
  96 static int  NewPicture      ( vout_thread_t *, picture_t * );
  97 static void SetPalette      ( vout_thread_t *,
  98                               uint16_t *, uint16_t *, uint16_t * );
  99
 100 /*****************************************************************************
 101  * Module descriptor
 102  *****************************************************************************/
 103 vlc_module_begin();
 104     set_shortname( "SDL" );
 105     set_category( CAT_VIDEO );
 106     set_subcategory( SUBCAT_VIDEO_VOUT );
 107     set_description( _("Simple DirectMedia Layer video output") );
 108     set_capability( "video output", 60 );
 109     add_shortcut( "sdl" );
 110     set_callbacks( Open, Close );
 111     /* XXX: check for conflicts with the SDL audio output */
 112     var_Create( p_module->p_libvlc, "sdl", VLC_VAR_MUTEX );
 113 #if defined( __i386__ ) || defined( __x86_64__ )
 114     /* On i386, SDL is linked against svgalib */
 115     linked_with_a_crap_library_which_uses_atexit();
 116 #endif
 117 vlc_module_end();
 118
 119 /*****************************************************************************
 120  * OpenVideo: allocate SDL video thread output method
 121  *****************************************************************************
 122  * This function allocate and initialize a SDL vout method. It uses some of the
 123  * vout properties to choose the correct mode, and change them according to the
 124  * mode actually used.
 125  *****************************************************************************/
 126 static int Open ( vlc_object_t *p_this )
 127 {
 128     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 129     vlc_value_t lockval;
 130
 131 #ifdef HAVE_SETENV
 132     char *psz_method;
 133 #endif
 134
 135     var_Get( p_this->p_libvlc, "sdl", &lockval );
 136     vlc_mutex_lock( lockval.p_address );
 137
 138     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
 139     {
 140         vlc_mutex_unlock( lockval.p_address );
 141         return VLC_EGENERIC;
 142     }
 143
 144     /* Allocate structure */
 145     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 146     if( p_vout->p_sys == NULL )
 147     {
 148         msg_Err( p_vout, "out of memory" );
 149         vlc_mutex_unlock( lockval.p_address );
 150         return VLC_ENOMEM;
 151     }
 152
 153     p_vout->pf_init = Init;
 154     p_vout->pf_end = End;
 155     p_vout->pf_manage = Manage;
 156     p_vout->pf_render = NULL;
 157     p_vout->pf_display = Display;
 158
 159 #ifdef HAVE_SETENV
 160     psz_method = config_GetPsz( p_vout, "vout" );
 161     if( psz_method )
 162     {
 163         while( *psz_method && *psz_method != ':' )
 164         {
 165             psz_method++;
 166         }
 167
 168         if( *psz_method )
 169         {
 170             setenv( "SDL_VIDEODRIVER", psz_method + 1, 1 );
 171         }
 172     }
 173 #endif
 174
 175     /* Initialize library */
 176     if( SDL_Init( SDL_INIT_VIDEO
 177 #ifndef WIN32
 178     /* Win32 SDL implementation doesn't support SDL_INIT_EVENTTHREAD yet*/
 179                 | SDL_INIT_EVENTTHREAD
 180 #endif
 181 #ifdef DEBUG
 182     /* In debug mode you may want vlc to dump a core instead of staying
 183      * stuck */
 184                 | SDL_INIT_NOPARACHUTE
 185 #endif
 186                 ) < 0 )
 187     {
 188         msg_Err( p_vout, "cannot initialize SDL (%s)", SDL_GetError() );
 189         free( p_vout->p_sys );
 190         vlc_mutex_unlock( lockval.p_address );
 191         return VLC_EGENERIC;
 192     }
 193
 194     vlc_mutex_unlock( lockval.p_address );
 195
 196     p_vout->p_sys->b_cursor = 1;
 197     p_vout->p_sys->b_cursor_autohidden = 0;
 198     p_vout->p_sys->i_lastmoved = mdate();
 199
 200     if( OpenDisplay( p_vout ) )
 201     {
 202         msg_Err( p_vout, "cannot set up SDL (%s)", SDL_GetError() );
 203         SDL_QuitSubSystem( SDL_INIT_VIDEO );
 204         free( p_vout->p_sys );
 205         return VLC_EGENERIC;
 206     }
 207
 208     return VLC_SUCCESS;
 209 }
 210
 211 /*****************************************************************************
 212  * Init: initialize SDL video thread output method
 213  *****************************************************************************
 214  * This function initialize the SDL display device.
 215  *****************************************************************************/
 216 static int Init( vout_thread_t *p_vout )
 217 {
 218     int i_index;
 219     picture_t *p_pic;
 220
 221     p_vout->p_sys->i_surfaces = 0;
 222
 223     I_OUTPUTPICTURES = 0;
 224
 225     /* Initialize the output structure */
 226     if( p_vout->p_sys->p_overlay == NULL )
 227     {
 228         /* All we have is an RGB image with square pixels */
 229         p_vout->output.i_width  = p_vout->p_sys->i_width;
 230         p_vout->output.i_height = p_vout->p_sys->i_height;
 231         p_vout->output.i_aspect = p_vout->output.i_width
 232                                    * VOUT_ASPECT_FACTOR
 233                                    / p_vout->output.i_height;
 234     }
 235     else
 236     {
 237         /* We may need to convert the chroma, but at least we keep the
 238          * aspect ratio */
 239         p_vout->output.i_width  = p_vout->render.i_width;
 240         p_vout->output.i_height = p_vout->render.i_height;
 241         p_vout->output.i_aspect = p_vout->render.i_aspect;
 242     }
 243
 244     /* Try to initialize SDL_MAX_DIRECTBUFFERS direct buffers */
 245     while( I_OUTPUTPICTURES < SDL_MAX_DIRECTBUFFERS )
 246     {
 247         p_pic = NULL;
 248
 249         /* Find an empty picture slot */
 250         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 251         {
 252             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 253             {
 254                 p_pic = p_vout->p_picture + i_index;
 255                 break;
 256             }
 257         }
 258
 259         /* Allocate the picture if we found one */
 260         if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 261         {
 262             break;
 263         }
 264
 265         p_pic->i_status = DESTROYED_PICTURE;
 266         p_pic->i_type   = DIRECT_PICTURE;
 267
 268         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 269
 270         I_OUTPUTPICTURES++;
 271     }
 272
 273     return VLC_SUCCESS;
 274 }
 275
 276 /*****************************************************************************
 277  * End: terminate Sys video thread output method
 278  *****************************************************************************
 279  * Terminate an output method created by OpenVideo
 280  *****************************************************************************/
 281 static void End( vout_thread_t *p_vout )
 282 {
 283     int i_index;
 284
 285     /* Free the output buffers we allocated */
 286     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 287     {
 288         i_index--;
 289         if( p_vout->p_sys->p_overlay == NULL )
 290         {
 291             /* RGB picture */
 292         }
 293         else
 294         {
 295             SDL_UnlockYUVOverlay(
 296                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 297             SDL_FreeYUVOverlay(
 298                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 299         }
 300         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 301     }
 302 }
 303
 304 /*****************************************************************************
 305  * CloseVideo: destroy Sys video thread output method
 306  *****************************************************************************
 307  * Terminate an output method created by vout_SDLCreate
 308  *****************************************************************************/
 309 static void Close ( vlc_object_t *p_this )
 310 {
 311     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 312
 313     CloseDisplay( p_vout );
 314     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 315
 316     free( p_vout->p_sys );
 317 }
 318
 319 /*****************************************************************************
 320  * Manage: handle Sys events
 321  *****************************************************************************
 322  * This function should be called regularly by video output thread. It returns
 323  * a non null value if an error occurred.
 324  *****************************************************************************/
 325 static int Manage( vout_thread_t *p_vout )
 326 {
 327     SDL_Event event;                                            /* SDL event */
 328     vlc_value_t val;
 329     int i_width, i_height, i_x, i_y;
 330
 331     /* Process events */
 332     while( SDL_PollEvent(&event) )
 333     {
 334         switch( event.type )
 335         {
 336         case SDL_VIDEORESIZE:                          /* Resizing of window */
 337             /* Update dimensions */
 338             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 339             p_vout->i_window_width = p_vout->p_sys->i_width = event.resize.w;
 340             p_vout->i_window_height = p_vout->p_sys->i_height = event.resize.h;
 341             break;
 342
 343         case SDL_MOUSEMOTION:
 344             vout_PlacePicture( p_vout, p_vout->p_sys->i_width,
 345                                p_vout->p_sys->i_height,
 346                                &i_x, &i_y, &i_width, &i_height );
 347
 348             val.i_int = ( event.motion.x - i_x )
 349                          * p_vout->render.i_width / i_width;
 350             var_Set( p_vout, "mouse-x", val );
 351             val.i_int = ( event.motion.y - i_y )
 352                          * p_vout->render.i_height / i_height;
 353             var_Set( p_vout, "mouse-y", val );
 354
 355             val.b_bool = VLC_TRUE;
 356             var_Set( p_vout, "mouse-moved", val );
 357
 358             if( p_vout->p_sys->b_cursor &&
 359                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 360             {
 361                 if( p_vout->p_sys->b_cursor_autohidden )
 362                 {
 363                     p_vout->p_sys->b_cursor_autohidden = 0;
 364                     SDL_ShowCursor( 1 );
 365                 }
 366                 else
 367                 {
 368                     p_vout->p_sys->i_lastmoved = mdate();
 369                 }
 370             }
 371             break;
 372
 373         case SDL_MOUSEBUTTONUP:
 374             switch( event.button.button )
 375             {
 376             case SDL_BUTTON_LEFT:
 377                 val.b_bool = VLC_TRUE;
 378                 var_Set( p_vout, "mouse-clicked", val );
 379                 break;
 380
 381             case SDL_BUTTON_RIGHT:
 382                 {
 383                     intf_thread_t *p_intf;
 384                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 385                                                       FIND_ANYWHERE );
 386                     if( p_intf )
 387                     {
 388                         p_intf->b_menu_change = 1;
 389                         vlc_object_release( p_intf );
 390                     }
 391                 }
 392                 break;
 393             }
 394             break;
 395
 396         case SDL_MOUSEBUTTONDOWN:
 397             switch( event.button.button )
 398             {
 399             case SDL_BUTTON_LEFT:
 400                 /* In this part we will eventually manage
 401                  * clicks for DVD navigation for instance. */
 402
 403                 /* detect double-clicks */
 404                 if( ( mdate() - p_vout->p_sys->i_lastpressed ) < 300000 )
 405                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 406
 407                 p_vout->p_sys->i_lastpressed = mdate();
 408                 break;
 409
 410             case 4:
 411                 break;
 412
 413             case 5:
 414                 break;
 415             }
 416             break;
 417
 418         case SDL_QUIT:
 419             p_vout->p_vlc->b_die = 1;
 420             break;
 421
 422         case SDL_KEYDOWN:                             /* if a key is pressed */
 423
 424             switch( event.key.keysym.sym )
 425             {
 426             case SDLK_ESCAPE:
 427                 if( p_vout->b_fullscreen )
 428                 {
 429                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 430                 }
 431                 else
 432                 {
 433                     p_vout->p_vlc->b_die = 1;
 434                 }
 435                 break;
 436
 437             case SDLK_q:                                             /* quit */
 438                 p_vout->p_vlc->b_die = 1;
 439                 break;
 440
 441             case SDLK_f:                             /* switch to fullscreen */
 442                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 443                 break;
 444
 445             case SDLK_c:                                 /* toggle grayscale */
 446                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 447                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 448                 break;
 449
 450             case SDLK_i:                                      /* toggle info */
 451                 p_vout->b_info = ! p_vout->b_info;
 452                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 453                 break;
 454
 455             case SDLK_s:                                   /* toggle scaling */
 456                 p_vout->b_scale = ! p_vout->b_scale;
 457                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 458                 break;
 459
 460             case SDLK_SPACE:                             /* toggle interface */
 461                 p_vout->b_interface = ! p_vout->b_interface;
 462                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 463                 break;
 464
 465             case SDLK_MENU:
 466                 {
 467                     intf_thread_t *p_intf;
 468                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 469                                                       FIND_ANYWHERE );
 470                     if( p_intf != NULL )
 471                     {
 472                         p_intf->b_menu_change = 1;
 473                         vlc_object_release( p_intf );
 474                     }
 475                 }
 476                 break;
 477
 478             case SDLK_LEFT:
 479                 break;
 480
 481             case SDLK_RIGHT:
 482                 break;
 483
 484             case SDLK_UP:
 485                 break;
 486
 487             case SDLK_DOWN:
 488                 break;
 489
 490             case SDLK_b:
 491                 {
 492                     audio_volume_t i_volume;
 493                     if ( !aout_VolumeDown( p_vout, 1, &i_volume ) )
 494                     {
 495                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 496                     }
 497                     else
 498                     {
 499                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 500                     }
 501                 }
 502                 break;
 503
 504             case SDLK_n:
 505                 {
 506                     audio_volume_t i_volume;
 507                     if ( !aout_VolumeUp( p_vout, 1, &i_volume ) )
 508                     {
 509                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 510                     }
 511                     else
 512                     {
 513                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 514                     }
 515                 }
 516                 break;
 517
 518              default:
 519                 break;
 520             }
 521             break;
 522
 523         default:
 524             break;
 525         }
 526     }
 527
 528     /* Fullscreen change */
 529     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 530     {
 531         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 532
 533         p_vout->p_sys->b_cursor_autohidden = 0;
 534         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 535                         ! p_vout->p_sys->b_cursor_autohidden );
 536
 537         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 538         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 539     }
 540
 541     /*
 542      * Size change
 543      */
 544     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 545     {
 546         msg_Dbg( p_vout, "video display resized (%dx%d)",
 547                  p_vout->p_sys->i_width, p_vout->p_sys->i_height );
 548
 549         CloseDisplay( p_vout );
 550         OpenDisplay( p_vout );
 551
 552         /* We don't need to signal the vout thread about the size change if
 553          * we can handle rescaling ourselves */
 554         if( p_vout->p_sys->p_overlay != NULL )
 555             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 556
 557     }
 558
 559     /* Pointer change */
 560     if( ! p_vout->p_sys->b_cursor_autohidden &&
 561         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 562     {
 563         /* Hide the mouse automatically */
 564         p_vout->p_sys->b_cursor_autohidden = 1;
 565         SDL_ShowCursor( 0 );
 566     }
 567
 568     return VLC_SUCCESS;
 569 }
 570
 571 /*****************************************************************************
 572  * Display: displays previously rendered output
 573  *****************************************************************************
 574  * This function sends the currently rendered image to the display.
 575  *****************************************************************************/
 576 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 577 {
 578     int x, y, w, h;
 579     SDL_Rect disp;
 580
 581     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 582                        &x, &y, &w, &h );
 583     disp.x = x;
 584     disp.y = y;
 585     disp.w = w;
 586     disp.h = h;
 587
 588     if( p_vout->p_sys->p_overlay == NULL )
 589     {
 590         /* RGB picture */
 591         SDL_Flip( p_vout->p_sys->p_display );
 592     }
 593     else
 594     {
 595         /* Overlay picture */
 596         SDL_UnlockYUVOverlay( p_pic->p_sys->p_overlay);
 597         SDL_DisplayYUVOverlay( p_pic->p_sys->p_overlay , &disp );
 598         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay);
 599     }
 600 }
 601
 602 /* following functions are local */
 603
 604 /*****************************************************************************
 605  * OpenDisplay: open and initialize SDL device
 606  *****************************************************************************
 607  * Open and initialize display according to preferences specified in the vout
 608  * thread fields.
 609  *****************************************************************************/
 610 static int OpenDisplay( vout_thread_t *p_vout )
 611 {
 612     uint32_t i_flags;
 613     int i_bpp;
 614
 615     /* SDL fucked up fourcc definitions on bigendian machines */
 616     uint32_t i_sdl_chroma;
 617
 618     /* Set main window's size */
 619     p_vout->p_sys->i_width = p_vout->b_fullscreen ? p_vout->output.i_width :
 620                                                     p_vout->i_window_width;
 621     p_vout->p_sys->i_height = p_vout->b_fullscreen ? p_vout->output.i_height :
 622                                                      p_vout->i_window_height;
 623
 624     /* Initialize flags and cursor */
 625     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE | SDL_DOUBLEBUF;
 626     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 627
 628     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 629                              SDL_DEFAULT_BPP, i_flags );
 630     if( i_bpp == 0 )
 631     {
 632         msg_Err( p_vout, "no video mode available" );
 633         return VLC_EGENERIC;
 634     }
 635
 636     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 637                                                  p_vout->p_sys->i_height,
 638                                                  i_bpp, i_flags );
 639
 640     if( p_vout->p_sys->p_display == NULL )
 641     {
 642         msg_Err( p_vout, "cannot set video mode" );
 643         return VLC_EGENERIC;
 644     }
 645
 646     SDL_LockSurface( p_vout->p_sys->p_display );
 647
 648     /* Choose the chroma we will try first. */
 649     switch( p_vout->render.i_chroma )
 650     {
 651         case VLC_FOURCC('Y','U','Y','2'):
 652         case VLC_FOURCC('Y','U','N','V'):
 653             p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 654             i_sdl_chroma = SDL_YUY2_OVERLAY;
 655             break;
 656         case VLC_FOURCC('U','Y','V','Y'):
 657         case VLC_FOURCC('U','Y','N','V'):
 658         case VLC_FOURCC('Y','4','2','2'):
 659             p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 660             i_sdl_chroma = SDL_UYVY_OVERLAY;
 661             break;
 662         case VLC_FOURCC('Y','V','Y','U'):
 663             p_vout->output.i_chroma = VLC_FOURCC('Y','V','Y','U');
 664             i_sdl_chroma = SDL_YVYU_OVERLAY;
 665             break;
 666         case VLC_FOURCC('Y','V','1','2'):
 667         case VLC_FOURCC('I','4','2','0'):
 668         case VLC_FOURCC('I','Y','U','V'):
 669         default:
 670             p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 671             i_sdl_chroma = SDL_YV12_OVERLAY;
 672             break;
 673     }
 674
 675     p_vout->p_sys->p_overlay =
 676         SDL_CreateYUVOverlay( 32, 32, i_sdl_chroma, p_vout->p_sys->p_display );
 677     /* FIXME: if the first overlay we find is software, don't stop,
 678      * because we may find a hardware one later ... */
 679
 680     /* If this best choice failed, fall back to other chromas */
 681     if( p_vout->p_sys->p_overlay == NULL )
 682     {
 683         p_vout->output.i_chroma = VLC_FOURCC('I','Y','U','V');
 684         p_vout->p_sys->p_overlay =
 685             SDL_CreateYUVOverlay( 32, 32, SDL_IYUV_OVERLAY,
 686                                   p_vout->p_sys->p_display );
 687     }
 688
 689     if( p_vout->p_sys->p_overlay == NULL )
 690     {
 691         p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 692         p_vout->p_sys->p_overlay =
 693             SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 694                                   p_vout->p_sys->p_display );
 695     }
 696
 697     if( p_vout->p_sys->p_overlay == NULL )
 698     {
 699         p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 700         p_vout->p_sys->p_overlay =
 701             SDL_CreateYUVOverlay( 32, 32, SDL_YUY2_OVERLAY,
 702                                   p_vout->p_sys->p_display );
 703     }
 704
 705     if( p_vout->p_sys->p_overlay == NULL )
 706     {
 707         msg_Warn( p_vout, "no SDL overlay for 0x%.8x (%4.4s)",
 708                   p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma );
 709
 710         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 711         {
 712             case 8:
 713                 p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
 714                 p_vout->output.pf_setpalette = SetPalette;
 715                 break;
 716             case 15:
 717                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5');
 718                 break;
 719             case 16:
 720                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 721                 break;
 722             case 24:
 723                 p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 724                 break;
 725             case 32:
 726                 p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 727                 break;
 728             default:
 729                 msg_Err( p_vout, "unknown screen depth %i",
 730                          p_vout->p_sys->p_display->format->BitsPerPixel );
 731                 SDL_UnlockSurface( p_vout->p_sys->p_display );
 732                 SDL_FreeSurface( p_vout->p_sys->p_display );
 733                 return VLC_EGENERIC;
 734         }
 735
 736         p_vout->output.i_rmask = p_vout->p_sys->p_display->format->Rmask;
 737         p_vout->output.i_gmask = p_vout->p_sys->p_display->format->Gmask;
 738         p_vout->output.i_bmask = p_vout->p_sys->p_display->format->Bmask;
 739
 740         SDL_WM_SetCaption( VOUT_TITLE " (software RGB SDL output)",
 741                            VOUT_TITLE " (software RGB SDL output)" );
 742     }
 743     else
 744     {
 745         if( p_vout->p_sys->p_overlay->hw_overlay )
 746         {
 747             SDL_WM_SetCaption( VOUT_TITLE " (hardware YUV SDL output)",
 748                                VOUT_TITLE " (hardware YUV SDL output)" );
 749         }
 750         else
 751         {
 752             SDL_WM_SetCaption( VOUT_TITLE " (software YUV SDL output)",
 753                                VOUT_TITLE " (software YUV SDL output)" );
 754         }
 755     }
 756
 757     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 758
 759     return VLC_SUCCESS;
 760 }
 761
 762 /*****************************************************************************
 763  * CloseDisplay: close and reset SDL device
 764  *****************************************************************************
 765  * This function returns all resources allocated by OpenDisplay and restore
 766  * the original state of the device.
 767  *****************************************************************************/
 768 static void CloseDisplay( vout_thread_t *p_vout )
 769 {
 770     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 771     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 772     SDL_FreeSurface( p_vout->p_sys->p_display );
 773 }
 774
 775 /*****************************************************************************
 776  * NewPicture: allocate a picture
 777  *****************************************************************************
 778  * Returns 0 on success, -1 otherwise
 779  *****************************************************************************/
 780 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 781 {
 782     int i_width  = p_vout->output.i_width;
 783     int i_height = p_vout->output.i_height;
 784
 785     if( p_vout->p_sys->p_overlay == NULL )
 786     {
 787         /* RGB picture */
 788         if( p_vout->p_sys->i_surfaces )
 789         {
 790             /* We already allocated this surface, return */
 791             return VLC_EGENERIC;
 792         }
 793
 794         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 795
 796         if( p_pic->p_sys == NULL )
 797         {
 798             return VLC_ENOMEM;
 799         }
 800
 801         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 802         {
 803             case 8:
 804                 p_pic->p->i_pixel_pitch = 1;
 805                 break;
 806             case 15:
 807             case 16:
 808                 p_pic->p->i_pixel_pitch = 2;
 809                 break;
 810             case 24:
 811             case 32:
 812                 p_pic->p->i_pixel_pitch = 4;
 813                 break;
 814             default:
 815                 return VLC_EGENERIC;
 816         }
 817
 818         p_pic->p->p_pixels = p_vout->p_sys->p_display->pixels;
 819         p_pic->p->i_lines = p_vout->p_sys->p_display->h;
 820         p_pic->p->i_visible_lines = p_vout->p_sys->p_display->h;
 821         p_pic->p->i_pitch = p_vout->p_sys->p_display->pitch;
 822         p_pic->p->i_visible_pitch =
 823             p_pic->p->i_pixel_pitch * p_vout->p_sys->p_display->w;
 824
 825         p_vout->p_sys->i_surfaces++;
 826
 827         p_pic->i_planes = 1;
 828     }
 829     else
 830     {
 831         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 832
 833         if( p_pic->p_sys == NULL )
 834         {
 835             return VLC_ENOMEM;
 836         }
 837
 838         p_pic->p_sys->p_overlay =
 839             SDL_CreateYUVOverlay( i_width, i_height,
 840                                   p_vout->output.i_chroma,
 841                                   p_vout->p_sys->p_display );
 842
 843         if( p_pic->p_sys->p_overlay == NULL )
 844         {
 845             free( p_pic->p_sys );
 846             return VLC_EGENERIC;
 847         }
 848
 849         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 850
 851         p_pic->Y_PIXELS = p_pic->p_sys->p_overlay->pixels[0];
 852         p_pic->p[Y_PLANE].i_lines = p_pic->p_sys->p_overlay->h;
 853         p_pic->p[Y_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h;
 854         p_pic->p[Y_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[0];
 855
 856         switch( p_vout->output.i_chroma )
 857         {
 858         case SDL_YV12_OVERLAY:
 859             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 860             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 861
 862             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 863             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 864             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 865             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 866             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 867             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 868
 869             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 870             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 871             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 872             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 873             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 874             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 875
 876             p_pic->i_planes = 3;
 877             break;
 878
 879         case SDL_IYUV_OVERLAY:
 880             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 881             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 882
 883             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 884             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 885             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 886             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 887             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 888             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 889
 890             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 891             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 892             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 893             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 894             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 895             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 896
 897             p_pic->i_planes = 3;
 898             break;
 899
 900         default:
 901             p_pic->p[Y_PLANE].i_pixel_pitch = 2;
 902             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w * 2;
 903
 904             p_pic->i_planes = 1;
 905             break;
 906         }
 907     }
 908
 909     return VLC_SUCCESS;
 910 }
 911
 912 /*****************************************************************************
 913  * SetPalette: sets an 8 bpp palette
 914  *****************************************************************************/
 915 static void SetPalette( vout_thread_t *p_vout,
 916                         uint16_t *red, uint16_t *green, uint16_t *blue )
 917 {
 918     SDL_Color colors[256];
 919     int i;
 920
 921     /* Fill colors with color information */
 922     for( i = 0; i < 256; i++ )
 923     {
 924         colors[ i ].r = red[ i ] >> 8;
 925         colors[ i ].g = green[ i ] >> 8;
 926         colors[ i ].b = blue[ i ] >> 8;
 927     }
 928
 929     /* Set palette */
 930     if( SDL_SetColors( p_vout->p_sys->p_display, colors, 0, 256 ) == 0 )
 931     {
 932         msg_Err( p_vout, "failed setting palette" );
 933     }
 934 }
 935