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 <string.h>                                            /* strerror() */
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc_interface.h>
  34 #include <vlc_vout.h>
  35 #include <vlc_aout.h>
  36
  37 #include <sys/types.h>
  38 #ifndef WIN32
  39 #   include <netinet/in.h>                            /* BSD: struct in_addr */
  40 #endif
  41
  42 #include SDL_INCLUDE_FILE
  43
  44 /* SDL is not able to crop overlays - so use only 1 direct buffer */
  45 #define SDL_MAX_DIRECTBUFFERS 1
  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 #define CHROMA_TEXT N_("SDL chroma format")
 101 #define CHROMA_LONGTEXT N_( \
 102     "Force the SDL renderer to use a specific chroma format instead of " \
 103     "trying to improve performances by using the most efficient one.")
 104
 105 /*****************************************************************************
 106  * Module descriptor
 107  *****************************************************************************/
 108 vlc_module_begin();
 109     set_shortname( "SDL" );
 110     set_category( CAT_VIDEO );
 111     set_subcategory( SUBCAT_VIDEO_VOUT );
 112     set_description( _("Simple DirectMedia Layer video output") );
 113     set_capability( "video output", 60 );
 114     add_shortcut( "sdl" );
 115     add_string( "sdl-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT, VLC_TRUE );
 116     set_callbacks( Open, Close );
 117 #if defined( __i386__ ) || defined( __x86_64__ )
 118     /* On i386, SDL is linked against svgalib */
 119     linked_with_a_crap_library_which_uses_atexit();
 120 #endif
 121 vlc_module_end();
 122
 123 /*****************************************************************************
 124  * OpenVideo: allocate SDL video thread output method
 125  *****************************************************************************
 126  * This function allocate and initialize a SDL vout method. It uses some of the
 127  * vout properties to choose the correct mode, and change them according to the
 128  * mode actually used.
 129  *****************************************************************************/
 130 static int Open ( vlc_object_t *p_this )
 131 {
 132     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 133     /* XXX: check for conflicts with the SDL audio output */
 134     vlc_mutex_t *lock = var_GetGlobalMutex( "sdl" );
 135
 136 #ifdef HAVE_SETENV
 137     char *psz_method;
 138 #endif
 139
 140     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 141     if( p_vout->p_sys == NULL )
 142     {
 143         vlc_mutex_unlock( lock );
 144         return VLC_ENOMEM;
 145     }
 146
 147     vlc_mutex_lock( lock );
 148
 149     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
 150     {
 151         vlc_mutex_unlock( lock );
 152         free( p_vout->p_sys );
 153         return VLC_EGENERIC;
 154     }
 155
 156     /* Allocate structure */
 157
 158     p_vout->pf_init = Init;
 159     p_vout->pf_end = End;
 160     p_vout->pf_manage = Manage;
 161     p_vout->pf_render = NULL;
 162     p_vout->pf_display = Display;
 163
 164 #ifdef HAVE_SETENV
 165     psz_method = config_GetPsz( p_vout, "vout" );
 166     if( psz_method )
 167     {
 168         while( *psz_method && *psz_method != ':' )
 169         {
 170             psz_method++;
 171         }
 172
 173         if( *psz_method )
 174         {
 175             setenv( "SDL_VIDEODRIVER", psz_method + 1, 1 );
 176         }
 177     }
 178 #endif
 179
 180     /* Initialize library */
 181     if( SDL_Init( SDL_INIT_VIDEO
 182 #ifndef WIN32
 183     /* Win32 SDL implementation doesn't support SDL_INIT_EVENTTHREAD yet*/
 184                 | SDL_INIT_EVENTTHREAD
 185 #endif
 186 #ifdef DEBUG
 187     /* In debug mode you may want vlc to dump a core instead of staying
 188      * stuck */
 189                 | SDL_INIT_NOPARACHUTE
 190 #endif
 191                 ) < 0 )
 192     {
 193         msg_Err( p_vout, "cannot initialize SDL (%s)", SDL_GetError() );
 194         free( p_vout->p_sys );
 195         vlc_mutex_unlock( lock );
 196         return VLC_EGENERIC;
 197     }
 198
 199     vlc_mutex_unlock( lock );
 200
 201     p_vout->p_sys->b_cursor = 1;
 202     p_vout->p_sys->b_cursor_autohidden = 0;
 203     p_vout->p_sys->i_lastmoved = mdate();
 204
 205     if( OpenDisplay( p_vout ) )
 206     {
 207         msg_Err( p_vout, "cannot set up SDL (%s)", SDL_GetError() );
 208         SDL_QuitSubSystem( SDL_INIT_VIDEO );
 209         free( p_vout->p_sys );
 210         return VLC_EGENERIC;
 211     }
 212
 213     return VLC_SUCCESS;
 214 }
 215
 216 /*****************************************************************************
 217  * Init: initialize SDL video thread output method
 218  *****************************************************************************
 219  * This function initialize the SDL display device.
 220  *****************************************************************************/
 221 static int Init( vout_thread_t *p_vout )
 222 {
 223     int i_index;
 224     picture_t *p_pic;
 225
 226     p_vout->p_sys->i_surfaces = 0;
 227
 228     I_OUTPUTPICTURES = 0;
 229
 230     /* Initialize the output structure */
 231     if( p_vout->p_sys->p_overlay == NULL )
 232     {
 233         /* All we have is an RGB image with square pixels */
 234         p_vout->output.i_width  = p_vout->p_sys->i_width;
 235         p_vout->output.i_height = p_vout->p_sys->i_height;
 236         p_vout->output.i_aspect = p_vout->output.i_width
 237                                    * VOUT_ASPECT_FACTOR
 238                                    / p_vout->output.i_height;
 239     }
 240     else
 241     {
 242         /* We may need to convert the chroma, but at least we keep the
 243          * aspect ratio */
 244         p_vout->output.i_width  = p_vout->render.i_width;
 245         p_vout->output.i_height = p_vout->render.i_height;
 246         p_vout->output.i_aspect = p_vout->render.i_aspect;
 247     }
 248
 249     /* Try to initialize SDL_MAX_DIRECTBUFFERS direct buffers */
 250     while( I_OUTPUTPICTURES < SDL_MAX_DIRECTBUFFERS )
 251     {
 252         p_pic = NULL;
 253
 254         /* Find an empty picture slot */
 255         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 256         {
 257             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 258             {
 259                 p_pic = p_vout->p_picture + i_index;
 260                 break;
 261             }
 262         }
 263
 264         /* Allocate the picture if we found one */
 265         if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 266         {
 267             break;
 268         }
 269
 270         p_pic->i_status = DESTROYED_PICTURE;
 271         p_pic->i_type   = DIRECT_PICTURE;
 272
 273         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 274
 275         I_OUTPUTPICTURES++;
 276     }
 277
 278     return VLC_SUCCESS;
 279 }
 280
 281 /*****************************************************************************
 282  * End: terminate Sys video thread output method
 283  *****************************************************************************
 284  * Terminate an output method created by OpenVideo
 285  *****************************************************************************/
 286 static void End( vout_thread_t *p_vout )
 287 {
 288     int i_index;
 289
 290     /* Free the output buffers we allocated */
 291     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 292     {
 293         i_index--;
 294         if( p_vout->p_sys->p_overlay == NULL )
 295         {
 296             /* RGB picture */
 297         }
 298         else
 299         {
 300             SDL_UnlockYUVOverlay(
 301                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 302             SDL_FreeYUVOverlay(
 303                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 304         }
 305         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 306     }
 307 }
 308
 309 /*****************************************************************************
 310  * CloseVideo: destroy Sys video thread output method
 311  *****************************************************************************
 312  * Terminate an output method created by vout_SDLCreate
 313  *****************************************************************************/
 314 static void Close ( vlc_object_t *p_this )
 315 {
 316     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 317
 318     CloseDisplay( p_vout );
 319     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 320
 321     free( p_vout->p_sys );
 322 }
 323
 324 /*****************************************************************************
 325  * Manage: handle Sys events
 326  *****************************************************************************
 327  * This function should be called regularly by video output thread. It returns
 328  * a non null value if an error occurred.
 329  *****************************************************************************/
 330 static int Manage( vout_thread_t *p_vout )
 331 {
 332     SDL_Event event;                                            /* SDL event */
 333     vlc_value_t val;
 334     unsigned int i_width, i_height, i_x, i_y;
 335
 336     /* Process events */
 337     while( SDL_PollEvent(&event) )
 338     {
 339         switch( event.type )
 340         {
 341         case SDL_VIDEORESIZE:                          /* Resizing of window */
 342             /* Update dimensions */
 343             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 344             p_vout->i_window_width = p_vout->p_sys->i_width = event.resize.w;
 345             p_vout->i_window_height = p_vout->p_sys->i_height = event.resize.h;
 346             break;
 347
 348         case SDL_MOUSEMOTION:
 349             vout_PlacePicture( p_vout, p_vout->p_sys->i_width,
 350                                p_vout->p_sys->i_height,
 351                                &i_x, &i_y, &i_width, &i_height );
 352
 353             val.i_int = ( event.motion.x - i_x )
 354                          * p_vout->render.i_width / i_width;
 355             var_Set( p_vout, "mouse-x", val );
 356             val.i_int = ( event.motion.y - i_y )
 357                          * p_vout->render.i_height / i_height;
 358             var_Set( p_vout, "mouse-y", val );
 359
 360             val.b_bool = VLC_TRUE;
 361             var_Set( p_vout, "mouse-moved", val );
 362
 363             if( p_vout->p_sys->b_cursor &&
 364                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 365             {
 366                 if( p_vout->p_sys->b_cursor_autohidden )
 367                 {
 368                     p_vout->p_sys->b_cursor_autohidden = 0;
 369                     SDL_ShowCursor( 1 );
 370                 }
 371                 else
 372                 {
 373                     p_vout->p_sys->i_lastmoved = mdate();
 374                 }
 375             }
 376             break;
 377
 378         case SDL_MOUSEBUTTONUP:
 379             switch( event.button.button )
 380             {
 381             case SDL_BUTTON_LEFT:
 382                 val.b_bool = VLC_TRUE;
 383                 var_Set( p_vout, "mouse-clicked", val );
 384                 break;
 385
 386             case SDL_BUTTON_RIGHT:
 387                 {
 388                     intf_thread_t *p_intf;
 389                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 390                                                       FIND_ANYWHERE );
 391                     if( p_intf )
 392                     {
 393                         p_intf->b_menu_change = 1;
 394                         vlc_object_release( p_intf );
 395                     }
 396                 }
 397                 break;
 398             }
 399             break;
 400
 401         case SDL_MOUSEBUTTONDOWN:
 402             switch( event.button.button )
 403             {
 404             case SDL_BUTTON_LEFT:
 405                 /* In this part we will eventually manage
 406                  * clicks for DVD navigation for instance. */
 407
 408                 /* detect double-clicks */
 409                 if( ( mdate() - p_vout->p_sys->i_lastpressed ) < 300000 )
 410                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 411
 412                 p_vout->p_sys->i_lastpressed = mdate();
 413                 break;
 414
 415             case 4:
 416                 break;
 417
 418             case 5:
 419                 break;
 420             }
 421             break;
 422
 423         case SDL_QUIT:
 424             vlc_object_kill( p_vout->p_libvlc );
 425             break;
 426
 427         case SDL_KEYDOWN:                             /* if a key is pressed */
 428
 429             switch( event.key.keysym.sym )
 430             {
 431             case SDLK_ESCAPE:
 432                 if( p_vout->b_fullscreen )
 433                 {
 434                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 435                 }
 436                 else
 437                 {
 438                     vlc_object_kill( p_vout->p_libvlc );
 439                 }
 440                 break;
 441
 442             case SDLK_q:                                             /* quit */
 443                 vlc_object_kill( p_vout->p_libvlc );
 444                 break;
 445
 446             case SDLK_f:                             /* switch to fullscreen */
 447                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 448                 break;
 449
 450             case SDLK_c:                                 /* toggle grayscale */
 451                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 452                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 453                 break;
 454
 455             case SDLK_i:                                      /* toggle info */
 456                 p_vout->b_info = ! p_vout->b_info;
 457                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 458                 break;
 459
 460             case SDLK_s:                                   /* toggle scaling */
 461                 p_vout->b_scale = ! p_vout->b_scale;
 462                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 463                 break;
 464
 465             case SDLK_SPACE:                             /* toggle interface */
 466                 p_vout->b_interface = ! p_vout->b_interface;
 467                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 468                 break;
 469
 470             case SDLK_MENU:
 471                 {
 472                     intf_thread_t *p_intf;
 473                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 474                                                       FIND_ANYWHERE );
 475                     if( p_intf != NULL )
 476                     {
 477                         p_intf->b_menu_change = 1;
 478                         vlc_object_release( p_intf );
 479                     }
 480                 }
 481                 break;
 482
 483             case SDLK_LEFT:
 484                 break;
 485
 486             case SDLK_RIGHT:
 487                 break;
 488
 489             case SDLK_UP:
 490                 break;
 491
 492             case SDLK_DOWN:
 493                 break;
 494
 495             case SDLK_b:
 496                 {
 497                     audio_volume_t i_volume;
 498                     if ( !aout_VolumeDown( p_vout, 1, &i_volume ) )
 499                     {
 500                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 501                     }
 502                     else
 503                     {
 504                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 505                     }
 506                 }
 507                 break;
 508
 509             case SDLK_n:
 510                 {
 511                     audio_volume_t i_volume;
 512                     if ( !aout_VolumeUp( p_vout, 1, &i_volume ) )
 513                     {
 514                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 515                     }
 516                     else
 517                     {
 518                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 519                     }
 520                 }
 521                 break;
 522
 523              default:
 524                 break;
 525             }
 526             break;
 527
 528         default:
 529             break;
 530         }
 531     }
 532
 533     /* Fullscreen change */
 534     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 535     {
 536         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 537
 538         p_vout->p_sys->b_cursor_autohidden = 0;
 539         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 540                         ! p_vout->p_sys->b_cursor_autohidden );
 541
 542         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 543         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 544     }
 545
 546     /*
 547      * Size change
 548      */
 549     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 550     {
 551         msg_Dbg( p_vout, "video display resized (%dx%d)",
 552                  p_vout->p_sys->i_width, p_vout->p_sys->i_height );
 553
 554         CloseDisplay( p_vout );
 555         OpenDisplay( p_vout );
 556
 557         /* We don't need to signal the vout thread about the size change if
 558          * we can handle rescaling ourselves */
 559         if( p_vout->p_sys->p_overlay != NULL )
 560             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 561
 562     }
 563
 564     /* Pointer change */
 565     if( ! p_vout->p_sys->b_cursor_autohidden &&
 566         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 567     {
 568         /* Hide the mouse automatically */
 569         p_vout->p_sys->b_cursor_autohidden = 1;
 570         SDL_ShowCursor( 0 );
 571     }
 572
 573     return VLC_SUCCESS;
 574 }
 575
 576 /*****************************************************************************
 577  * Display: displays previously rendered output
 578  *****************************************************************************
 579  * This function sends the currently rendered image to the display.
 580  *****************************************************************************/
 581 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 582 {
 583     unsigned int x, y, w, h;
 584     SDL_Rect disp;
 585
 586     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 587                        &x, &y, &w, &h );
 588     disp.x = x;
 589     disp.y = y;
 590     disp.w = w;
 591     disp.h = h;
 592
 593     if( p_vout->p_sys->p_overlay == NULL )
 594     {
 595         /* RGB picture */
 596         SDL_Flip( p_vout->p_sys->p_display );
 597     }
 598     else
 599     {
 600         /* Overlay picture */
 601         SDL_UnlockYUVOverlay( p_pic->p_sys->p_overlay);
 602         SDL_DisplayYUVOverlay( p_pic->p_sys->p_overlay , &disp );
 603         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay);
 604     }
 605 }
 606
 607 /* following functions are local */
 608
 609 /*****************************************************************************
 610  * OpenDisplay: open and initialize SDL device
 611  *****************************************************************************
 612  * Open and initialize display according to preferences specified in the vout
 613  * thread fields.
 614  *****************************************************************************/
 615 static int OpenDisplay( vout_thread_t *p_vout )
 616 {
 617     uint32_t i_flags;
 618     int i_bpp;
 619
 620     /* SDL fucked up fourcc definitions on bigendian machines */
 621     uint32_t i_sdl_chroma;
 622     char *psz_chroma = NULL;
 623     uint32_t i_chroma = 0;
 624
 625     /* Set main window's size */
 626     p_vout->p_sys->i_width = p_vout->b_fullscreen ? p_vout->output.i_width :
 627                                                     p_vout->i_window_width;
 628     p_vout->p_sys->i_height = p_vout->b_fullscreen ? p_vout->output.i_height :
 629                                                      p_vout->i_window_height;
 630
 631     /* Initialize flags and cursor */
 632     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE | SDL_DOUBLEBUF;
 633     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 634
 635     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 636                              SDL_DEFAULT_BPP, i_flags );
 637     if( i_bpp == 0 )
 638     {
 639         msg_Err( p_vout, "no video mode available" );
 640         return VLC_EGENERIC;
 641     }
 642
 643     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 644                                                  p_vout->p_sys->i_height,
 645                                                  i_bpp, i_flags );
 646
 647     if( p_vout->p_sys->p_display == NULL )
 648     {
 649         msg_Err( p_vout, "cannot set video mode" );
 650         return VLC_EGENERIC;
 651     }
 652
 653     SDL_LockSurface( p_vout->p_sys->p_display );
 654
 655     if( ( psz_chroma = config_GetPsz( p_vout, "sdl-chroma" ) ) )
 656     {
 657         if( strlen( psz_chroma ) >= 4 )
 658         {
 659             memcpy(&i_chroma, psz_chroma, 4);
 660             msg_Dbg( p_vout, "Forcing chroma to 0x%.8x (%4.4s)", i_chroma, (char*)&i_chroma );
 661         }
 662         else
 663         {
 664             free( psz_chroma );
 665             psz_chroma = NULL;
 666         }
 667     }
 668
 669     /* Choose the chroma we will try first. */
 670     do
 671     {
 672         if( !psz_chroma ) i_chroma = 0;
 673         switch( i_chroma ? i_chroma : p_vout->render.i_chroma )
 674         {
 675             case VLC_FOURCC('Y','U','Y','2'):
 676             case VLC_FOURCC('Y','U','N','V'):
 677                 p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 678                 i_sdl_chroma = SDL_YUY2_OVERLAY;
 679                 break;
 680             case VLC_FOURCC('U','Y','V','Y'):
 681             case VLC_FOURCC('U','Y','N','V'):
 682             case VLC_FOURCC('Y','4','2','2'):
 683                 p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 684                 i_sdl_chroma = SDL_UYVY_OVERLAY;
 685                 break;
 686             case VLC_FOURCC('Y','V','Y','U'):
 687                 p_vout->output.i_chroma = VLC_FOURCC('Y','V','Y','U');
 688                 i_sdl_chroma = SDL_YVYU_OVERLAY;
 689                 break;
 690             case VLC_FOURCC('Y','V','1','2'):
 691             case VLC_FOURCC('I','4','2','0'):
 692             case VLC_FOURCC('I','Y','U','V'):
 693             default:
 694                 p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 695                 i_sdl_chroma = SDL_YV12_OVERLAY;
 696                 break;
 697         }
 698         free( psz_chroma ); psz_chroma = NULL;
 699
 700         p_vout->p_sys->p_overlay =
 701             SDL_CreateYUVOverlay( 32, 32, i_sdl_chroma,
 702                                   p_vout->p_sys->p_display );
 703         /* FIXME: if the first overlay we find is software, don't stop,
 704          * because we may find a hardware one later ... */
 705     }
 706     while( i_chroma && !p_vout->p_sys->p_overlay );
 707
 708
 709     /* If this best choice failed, fall back to other chromas */
 710     if( p_vout->p_sys->p_overlay == NULL )
 711     {
 712         p_vout->output.i_chroma = VLC_FOURCC('I','Y','U','V');
 713         p_vout->p_sys->p_overlay =
 714             SDL_CreateYUVOverlay( 32, 32, SDL_IYUV_OVERLAY,
 715                                   p_vout->p_sys->p_display );
 716     }
 717
 718     if( p_vout->p_sys->p_overlay == NULL )
 719     {
 720         p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 721         p_vout->p_sys->p_overlay =
 722             SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 723                                   p_vout->p_sys->p_display );
 724     }
 725
 726     if( p_vout->p_sys->p_overlay == NULL )
 727     {
 728         p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 729         p_vout->p_sys->p_overlay =
 730             SDL_CreateYUVOverlay( 32, 32, SDL_YUY2_OVERLAY,
 731                                   p_vout->p_sys->p_display );
 732     }
 733
 734     if( p_vout->p_sys->p_overlay == NULL )
 735     {
 736         msg_Warn( p_vout, "no SDL overlay for 0x%.8x (%4.4s)",
 737                   p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma );
 738
 739         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 740         {
 741             case 8:
 742                 p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
 743                 p_vout->output.pf_setpalette = SetPalette;
 744                 break;
 745             case 15:
 746                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5');
 747                 break;
 748             case 16:
 749                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 750                 break;
 751             case 24:
 752                 p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 753                 break;
 754             case 32:
 755                 p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 756                 break;
 757             default:
 758                 msg_Err( p_vout, "unknown screen depth %i",
 759                          p_vout->p_sys->p_display->format->BitsPerPixel );
 760                 SDL_UnlockSurface( p_vout->p_sys->p_display );
 761                 SDL_FreeSurface( p_vout->p_sys->p_display );
 762                 return VLC_EGENERIC;
 763         }
 764
 765         p_vout->output.i_rmask = p_vout->p_sys->p_display->format->Rmask;
 766         p_vout->output.i_gmask = p_vout->p_sys->p_display->format->Gmask;
 767         p_vout->output.i_bmask = p_vout->p_sys->p_display->format->Bmask;
 768
 769         SDL_WM_SetCaption( VOUT_TITLE " (software RGB SDL output)",
 770                            VOUT_TITLE " (software RGB SDL output)" );
 771     }
 772     else
 773     {
 774         if( p_vout->p_sys->p_overlay->hw_overlay )
 775         {
 776             SDL_WM_SetCaption( VOUT_TITLE " (hardware YUV SDL output)",
 777                                VOUT_TITLE " (hardware YUV SDL output)" );
 778         }
 779         else
 780         {
 781             SDL_WM_SetCaption( VOUT_TITLE " (software YUV SDL output)",
 782                                VOUT_TITLE " (software YUV SDL output)" );
 783         }
 784     }
 785
 786     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 787
 788     return VLC_SUCCESS;
 789 }
 790
 791 /*****************************************************************************
 792  * CloseDisplay: close and reset SDL device
 793  *****************************************************************************
 794  * This function returns all resources allocated by OpenDisplay and restore
 795  * the original state of the device.
 796  *****************************************************************************/
 797 static void CloseDisplay( vout_thread_t *p_vout )
 798 {
 799     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 800     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 801     SDL_FreeSurface( p_vout->p_sys->p_display );
 802 }
 803
 804 /*****************************************************************************
 805  * NewPicture: allocate a picture
 806  *****************************************************************************
 807  * Returns 0 on success, -1 otherwise
 808  *****************************************************************************/
 809 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 810 {
 811     int i_width  = p_vout->output.i_width;
 812     int i_height = p_vout->output.i_height;
 813
 814     if( p_vout->p_sys->p_overlay == NULL )
 815     {
 816         /* RGB picture */
 817         if( p_vout->p_sys->i_surfaces )
 818         {
 819             /* We already allocated this surface, return */
 820             return VLC_EGENERIC;
 821         }
 822
 823         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 824
 825         if( p_pic->p_sys == NULL )
 826         {
 827             return VLC_ENOMEM;
 828         }
 829
 830         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 831         {
 832             case 8:
 833                 p_pic->p->i_pixel_pitch = 1;
 834                 break;
 835             case 15:
 836             case 16:
 837                 p_pic->p->i_pixel_pitch = 2;
 838                 break;
 839             case 24:
 840             case 32:
 841                 p_pic->p->i_pixel_pitch = 4;
 842                 break;
 843             default:
 844                 return VLC_EGENERIC;
 845         }
 846
 847         p_pic->p->p_pixels = p_vout->p_sys->p_display->pixels;
 848         p_pic->p->i_lines = p_vout->p_sys->p_display->h;
 849         p_pic->p->i_visible_lines = p_vout->p_sys->p_display->h;
 850         p_pic->p->i_pitch = p_vout->p_sys->p_display->pitch;
 851         p_pic->p->i_visible_pitch =
 852             p_pic->p->i_pixel_pitch * p_vout->p_sys->p_display->w;
 853
 854         p_vout->p_sys->i_surfaces++;
 855
 856         p_pic->i_planes = 1;
 857     }
 858     else
 859     {
 860         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 861
 862         if( p_pic->p_sys == NULL )
 863         {
 864             return VLC_ENOMEM;
 865         }
 866
 867         p_pic->p_sys->p_overlay =
 868             SDL_CreateYUVOverlay( i_width, i_height,
 869                                   p_vout->output.i_chroma,
 870                                   p_vout->p_sys->p_display );
 871
 872         if( p_pic->p_sys->p_overlay == NULL )
 873         {
 874             free( p_pic->p_sys );
 875             return VLC_EGENERIC;
 876         }
 877
 878         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 879
 880         p_pic->Y_PIXELS = p_pic->p_sys->p_overlay->pixels[0];
 881         p_pic->p[Y_PLANE].i_lines = p_pic->p_sys->p_overlay->h;
 882         p_pic->p[Y_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h;
 883         p_pic->p[Y_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[0];
 884
 885         switch( p_vout->output.i_chroma )
 886         {
 887         case SDL_YV12_OVERLAY:
 888             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 889             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 890
 891             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 892             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 893             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 894             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 895             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 896             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 897
 898             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 899             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 900             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 901             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 902             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 903             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 904
 905             p_pic->i_planes = 3;
 906             break;
 907
 908         case SDL_IYUV_OVERLAY:
 909             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 910             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 911
 912             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 913             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 914             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 915             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 916             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 917             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 918
 919             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 920             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 921             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 922             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 923             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 924             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 925
 926             p_pic->i_planes = 3;
 927             break;
 928
 929         default:
 930             p_pic->p[Y_PLANE].i_pixel_pitch = 2;
 931             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w * 2;
 932
 933             p_pic->i_planes = 1;
 934             break;
 935         }
 936     }
 937
 938     return VLC_SUCCESS;
 939 }
 940
 941 /*****************************************************************************
 942  * SetPalette: sets an 8 bpp palette
 943  *****************************************************************************/
 944 static void SetPalette( vout_thread_t *p_vout,
 945                         uint16_t *red, uint16_t *green, uint16_t *blue )
 946 {
 947     SDL_Color colors[256];
 948     int i;
 949
 950     /* Fill colors with color information */
 951     for( i = 0; i < 256; i++ )
 952     {
 953         colors[ i ].r = red[ i ] >> 8;
 954         colors[ i ].g = green[ i ] >> 8;
 955         colors[ i ].b = blue[ i ] >> 8;
 956     }
 957
 958     /* Set palette */
 959     if( SDL_SetColors( p_vout->p_sys->p_display, colors, 0, 256 ) == 0 )
 960     {
 961         msg_Err( p_vout, "failed to set palette" );
 962     }
 963 }
 964