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_interface.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 #define CHROMA_TEXT N_("SDL chroma format")
 102 #define CHROMA_LONGTEXT N_( \
 103     "Force the SDL renderer to use a specific chroma format instead of " \
 104     "trying to improve performances by using the most efficient one.")
 105
 106 /*****************************************************************************
 107  * Module descriptor
 108  *****************************************************************************/
 109 vlc_module_begin();
 110     set_shortname( "SDL" );
 111     set_category( CAT_VIDEO );
 112     set_subcategory( SUBCAT_VIDEO_VOUT );
 113     set_description( _("Simple DirectMedia Layer video output") );
 114     set_capability( "video output", 60 );
 115     add_shortcut( "sdl" );
 116     add_string( "sdl-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT, VLC_TRUE );
 117     set_callbacks( Open, Close );
 118     /* XXX: check for conflicts with the SDL audio output */
 119     var_Create( p_module->p_libvlc_global, "sdl", VLC_VAR_MUTEX );
 120 #if defined( __i386__ ) || defined( __x86_64__ )
 121     /* On i386, SDL is linked against svgalib */
 122     linked_with_a_crap_library_which_uses_atexit();
 123 #endif
 124 vlc_module_end();
 125
 126 /*****************************************************************************
 127  * OpenVideo: allocate SDL video thread output method
 128  *****************************************************************************
 129  * This function allocate and initialize a SDL vout method. It uses some of the
 130  * vout properties to choose the correct mode, and change them according to the
 131  * mode actually used.
 132  *****************************************************************************/
 133 static int Open ( vlc_object_t *p_this )
 134 {
 135     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 136     vlc_value_t lockval;
 137
 138 #ifdef HAVE_SETENV
 139     char *psz_method;
 140 #endif
 141
 142     var_Get( p_this->p_libvlc_global, "sdl", &lockval );
 143     vlc_mutex_lock( lockval.p_address );
 144
 145     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
 146     {
 147         vlc_mutex_unlock( lockval.p_address );
 148         return VLC_EGENERIC;
 149     }
 150
 151     /* Allocate structure */
 152     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 153     if( p_vout->p_sys == NULL )
 154     {
 155         msg_Err( p_vout, "out of memory" );
 156         vlc_mutex_unlock( lockval.p_address );
 157         return VLC_ENOMEM;
 158     }
 159
 160     p_vout->pf_init = Init;
 161     p_vout->pf_end = End;
 162     p_vout->pf_manage = Manage;
 163     p_vout->pf_render = NULL;
 164     p_vout->pf_display = Display;
 165
 166 #ifdef HAVE_SETENV
 167     psz_method = config_GetPsz( p_vout, "vout" );
 168     if( psz_method )
 169     {
 170         while( *psz_method && *psz_method != ':' )
 171         {
 172             psz_method++;
 173         }
 174
 175         if( *psz_method )
 176         {
 177             setenv( "SDL_VIDEODRIVER", psz_method + 1, 1 );
 178         }
 179     }
 180 #endif
 181
 182     /* Initialize library */
 183     if( SDL_Init( SDL_INIT_VIDEO
 184 #ifndef WIN32
 185     /* Win32 SDL implementation doesn't support SDL_INIT_EVENTTHREAD yet*/
 186                 | SDL_INIT_EVENTTHREAD
 187 #endif
 188 #ifdef DEBUG
 189     /* In debug mode you may want vlc to dump a core instead of staying
 190      * stuck */
 191                 | SDL_INIT_NOPARACHUTE
 192 #endif
 193                 ) < 0 )
 194     {
 195         msg_Err( p_vout, "cannot initialize SDL (%s)", SDL_GetError() );
 196         free( p_vout->p_sys );
 197         vlc_mutex_unlock( lockval.p_address );
 198         return VLC_EGENERIC;
 199     }
 200
 201     vlc_mutex_unlock( lockval.p_address );
 202
 203     p_vout->p_sys->b_cursor = 1;
 204     p_vout->p_sys->b_cursor_autohidden = 0;
 205     p_vout->p_sys->i_lastmoved = mdate();
 206
 207     if( OpenDisplay( p_vout ) )
 208     {
 209         msg_Err( p_vout, "cannot set up SDL (%s)", SDL_GetError() );
 210         SDL_QuitSubSystem( SDL_INIT_VIDEO );
 211         free( p_vout->p_sys );
 212         return VLC_EGENERIC;
 213     }
 214
 215     return VLC_SUCCESS;
 216 }
 217
 218 /*****************************************************************************
 219  * Init: initialize SDL video thread output method
 220  *****************************************************************************
 221  * This function initialize the SDL display device.
 222  *****************************************************************************/
 223 static int Init( vout_thread_t *p_vout )
 224 {
 225     int i_index;
 226     picture_t *p_pic;
 227
 228     p_vout->p_sys->i_surfaces = 0;
 229
 230     I_OUTPUTPICTURES = 0;
 231
 232     /* Initialize the output structure */
 233     if( p_vout->p_sys->p_overlay == NULL )
 234     {
 235         /* All we have is an RGB image with square pixels */
 236         p_vout->output.i_width  = p_vout->p_sys->i_width;
 237         p_vout->output.i_height = p_vout->p_sys->i_height;
 238         p_vout->output.i_aspect = p_vout->output.i_width
 239                                    * VOUT_ASPECT_FACTOR
 240                                    / p_vout->output.i_height;
 241     }
 242     else
 243     {
 244         /* We may need to convert the chroma, but at least we keep the
 245          * aspect ratio */
 246         p_vout->output.i_width  = p_vout->render.i_width;
 247         p_vout->output.i_height = p_vout->render.i_height;
 248         p_vout->output.i_aspect = p_vout->render.i_aspect;
 249     }
 250
 251     /* Try to initialize SDL_MAX_DIRECTBUFFERS direct buffers */
 252     while( I_OUTPUTPICTURES < SDL_MAX_DIRECTBUFFERS )
 253     {
 254         p_pic = NULL;
 255
 256         /* Find an empty picture slot */
 257         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 258         {
 259             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 260             {
 261                 p_pic = p_vout->p_picture + i_index;
 262                 break;
 263             }
 264         }
 265
 266         /* Allocate the picture if we found one */
 267         if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 268         {
 269             break;
 270         }
 271
 272         p_pic->i_status = DESTROYED_PICTURE;
 273         p_pic->i_type   = DIRECT_PICTURE;
 274
 275         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 276
 277         I_OUTPUTPICTURES++;
 278     }
 279
 280     return VLC_SUCCESS;
 281 }
 282
 283 /*****************************************************************************
 284  * End: terminate Sys video thread output method
 285  *****************************************************************************
 286  * Terminate an output method created by OpenVideo
 287  *****************************************************************************/
 288 static void End( vout_thread_t *p_vout )
 289 {
 290     int i_index;
 291
 292     /* Free the output buffers we allocated */
 293     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 294     {
 295         i_index--;
 296         if( p_vout->p_sys->p_overlay == NULL )
 297         {
 298             /* RGB picture */
 299         }
 300         else
 301         {
 302             SDL_UnlockYUVOverlay(
 303                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 304             SDL_FreeYUVOverlay(
 305                     PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 306         }
 307         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 308     }
 309 }
 310
 311 /*****************************************************************************
 312  * CloseVideo: destroy Sys video thread output method
 313  *****************************************************************************
 314  * Terminate an output method created by vout_SDLCreate
 315  *****************************************************************************/
 316 static void Close ( vlc_object_t *p_this )
 317 {
 318     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 319
 320     CloseDisplay( p_vout );
 321     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 322
 323     free( p_vout->p_sys );
 324 }
 325
 326 /*****************************************************************************
 327  * Manage: handle Sys events
 328  *****************************************************************************
 329  * This function should be called regularly by video output thread. It returns
 330  * a non null value if an error occurred.
 331  *****************************************************************************/
 332 static int Manage( vout_thread_t *p_vout )
 333 {
 334     SDL_Event event;                                            /* SDL event */
 335     vlc_value_t val;
 336     unsigned int i_width, i_height, i_x, i_y;
 337
 338     /* Process events */
 339     while( SDL_PollEvent(&event) )
 340     {
 341         switch( event.type )
 342         {
 343         case SDL_VIDEORESIZE:                          /* Resizing of window */
 344             /* Update dimensions */
 345             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 346             p_vout->i_window_width = p_vout->p_sys->i_width = event.resize.w;
 347             p_vout->i_window_height = p_vout->p_sys->i_height = event.resize.h;
 348             break;
 349
 350         case SDL_MOUSEMOTION:
 351             vout_PlacePicture( p_vout, p_vout->p_sys->i_width,
 352                                p_vout->p_sys->i_height,
 353                                &i_x, &i_y, &i_width, &i_height );
 354
 355             val.i_int = ( event.motion.x - i_x )
 356                          * p_vout->render.i_width / i_width;
 357             var_Set( p_vout, "mouse-x", val );
 358             val.i_int = ( event.motion.y - i_y )
 359                          * p_vout->render.i_height / i_height;
 360             var_Set( p_vout, "mouse-y", val );
 361
 362             val.b_bool = VLC_TRUE;
 363             var_Set( p_vout, "mouse-moved", val );
 364
 365             if( p_vout->p_sys->b_cursor &&
 366                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 367             {
 368                 if( p_vout->p_sys->b_cursor_autohidden )
 369                 {
 370                     p_vout->p_sys->b_cursor_autohidden = 0;
 371                     SDL_ShowCursor( 1 );
 372                 }
 373                 else
 374                 {
 375                     p_vout->p_sys->i_lastmoved = mdate();
 376                 }
 377             }
 378             break;
 379
 380         case SDL_MOUSEBUTTONUP:
 381             switch( event.button.button )
 382             {
 383             case SDL_BUTTON_LEFT:
 384                 val.b_bool = VLC_TRUE;
 385                 var_Set( p_vout, "mouse-clicked", val );
 386                 break;
 387
 388             case SDL_BUTTON_RIGHT:
 389                 {
 390                     intf_thread_t *p_intf;
 391                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 392                                                       FIND_ANYWHERE );
 393                     if( p_intf )
 394                     {
 395                         p_intf->b_menu_change = 1;
 396                         vlc_object_release( p_intf );
 397                     }
 398                 }
 399                 break;
 400             }
 401             break;
 402
 403         case SDL_MOUSEBUTTONDOWN:
 404             switch( event.button.button )
 405             {
 406             case SDL_BUTTON_LEFT:
 407                 /* In this part we will eventually manage
 408                  * clicks for DVD navigation for instance. */
 409
 410                 /* detect double-clicks */
 411                 if( ( mdate() - p_vout->p_sys->i_lastpressed ) < 300000 )
 412                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 413
 414                 p_vout->p_sys->i_lastpressed = mdate();
 415                 break;
 416
 417             case 4:
 418                 break;
 419
 420             case 5:
 421                 break;
 422             }
 423             break;
 424
 425         case SDL_QUIT:
 426             vlc_object_kill( p_vout->p_libvlc );
 427             break;
 428
 429         case SDL_KEYDOWN:                             /* if a key is pressed */
 430
 431             switch( event.key.keysym.sym )
 432             {
 433             case SDLK_ESCAPE:
 434                 if( p_vout->b_fullscreen )
 435                 {
 436                     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 437                 }
 438                 else
 439                 {
 440                     vlc_object_kill( p_vout->p_libvlc );
 441                 }
 442                 break;
 443
 444             case SDLK_q:                                             /* quit */
 445                 vlc_object_kill( p_vout->p_libvlc );
 446                 break;
 447
 448             case SDLK_f:                             /* switch to fullscreen */
 449                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 450                 break;
 451
 452             case SDLK_c:                                 /* toggle grayscale */
 453                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 454                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 455                 break;
 456
 457             case SDLK_i:                                      /* toggle info */
 458                 p_vout->b_info = ! p_vout->b_info;
 459                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 460                 break;
 461
 462             case SDLK_s:                                   /* toggle scaling */
 463                 p_vout->b_scale = ! p_vout->b_scale;
 464                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 465                 break;
 466
 467             case SDLK_SPACE:                             /* toggle interface */
 468                 p_vout->b_interface = ! p_vout->b_interface;
 469                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 470                 break;
 471
 472             case SDLK_MENU:
 473                 {
 474                     intf_thread_t *p_intf;
 475                     p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
 476                                                       FIND_ANYWHERE );
 477                     if( p_intf != NULL )
 478                     {
 479                         p_intf->b_menu_change = 1;
 480                         vlc_object_release( p_intf );
 481                     }
 482                 }
 483                 break;
 484
 485             case SDLK_LEFT:
 486                 break;
 487
 488             case SDLK_RIGHT:
 489                 break;
 490
 491             case SDLK_UP:
 492                 break;
 493
 494             case SDLK_DOWN:
 495                 break;
 496
 497             case SDLK_b:
 498                 {
 499                     audio_volume_t i_volume;
 500                     if ( !aout_VolumeDown( p_vout, 1, &i_volume ) )
 501                     {
 502                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 503                     }
 504                     else
 505                     {
 506                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 507                     }
 508                 }
 509                 break;
 510
 511             case SDLK_n:
 512                 {
 513                     audio_volume_t i_volume;
 514                     if ( !aout_VolumeUp( p_vout, 1, &i_volume ) )
 515                     {
 516                         msg_Dbg( p_vout, "audio volume is now %d", i_volume );
 517                     }
 518                     else
 519                     {
 520                         msg_Dbg( p_vout, "audio volume: operation not supported" );
 521                     }
 522                 }
 523                 break;
 524
 525              default:
 526                 break;
 527             }
 528             break;
 529
 530         default:
 531             break;
 532         }
 533     }
 534
 535     /* Fullscreen change */
 536     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 537     {
 538         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 539
 540         p_vout->p_sys->b_cursor_autohidden = 0;
 541         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 542                         ! p_vout->p_sys->b_cursor_autohidden );
 543
 544         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 545         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 546     }
 547
 548     /*
 549      * Size change
 550      */
 551     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 552     {
 553         msg_Dbg( p_vout, "video display resized (%dx%d)",
 554                  p_vout->p_sys->i_width, p_vout->p_sys->i_height );
 555
 556         CloseDisplay( p_vout );
 557         OpenDisplay( p_vout );
 558
 559         /* We don't need to signal the vout thread about the size change if
 560          * we can handle rescaling ourselves */
 561         if( p_vout->p_sys->p_overlay != NULL )
 562             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 563
 564     }
 565
 566     /* Pointer change */
 567     if( ! p_vout->p_sys->b_cursor_autohidden &&
 568         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 569     {
 570         /* Hide the mouse automatically */
 571         p_vout->p_sys->b_cursor_autohidden = 1;
 572         SDL_ShowCursor( 0 );
 573     }
 574
 575     return VLC_SUCCESS;
 576 }
 577
 578 /*****************************************************************************
 579  * Display: displays previously rendered output
 580  *****************************************************************************
 581  * This function sends the currently rendered image to the display.
 582  *****************************************************************************/
 583 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 584 {
 585     unsigned int x, y, w, h;
 586     SDL_Rect disp;
 587
 588     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 589                        &x, &y, &w, &h );
 590     disp.x = x;
 591     disp.y = y;
 592     disp.w = w;
 593     disp.h = h;
 594
 595     if( p_vout->p_sys->p_overlay == NULL )
 596     {
 597         /* RGB picture */
 598         SDL_Flip( p_vout->p_sys->p_display );
 599     }
 600     else
 601     {
 602         /* Overlay picture */
 603         SDL_UnlockYUVOverlay( p_pic->p_sys->p_overlay);
 604         SDL_DisplayYUVOverlay( p_pic->p_sys->p_overlay , &disp );
 605         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay);
 606     }
 607 }
 608
 609 /* following functions are local */
 610
 611 /*****************************************************************************
 612  * OpenDisplay: open and initialize SDL device
 613  *****************************************************************************
 614  * Open and initialize display according to preferences specified in the vout
 615  * thread fields.
 616  *****************************************************************************/
 617 static int OpenDisplay( vout_thread_t *p_vout )
 618 {
 619     uint32_t i_flags;
 620     int i_bpp;
 621
 622     /* SDL fucked up fourcc definitions on bigendian machines */
 623     uint32_t i_sdl_chroma;
 624     char *psz_chroma = NULL;
 625     uint32_t i_chroma = 0;
 626
 627     /* Set main window's size */
 628     p_vout->p_sys->i_width = p_vout->b_fullscreen ? p_vout->output.i_width :
 629                                                     p_vout->i_window_width;
 630     p_vout->p_sys->i_height = p_vout->b_fullscreen ? p_vout->output.i_height :
 631                                                      p_vout->i_window_height;
 632
 633     /* Initialize flags and cursor */
 634     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE | SDL_DOUBLEBUF;
 635     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 636
 637     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 638                              SDL_DEFAULT_BPP, i_flags );
 639     if( i_bpp == 0 )
 640     {
 641         msg_Err( p_vout, "no video mode available" );
 642         return VLC_EGENERIC;
 643     }
 644
 645     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 646                                                  p_vout->p_sys->i_height,
 647                                                  i_bpp, i_flags );
 648
 649     if( p_vout->p_sys->p_display == NULL )
 650     {
 651         msg_Err( p_vout, "cannot set video mode" );
 652         return VLC_EGENERIC;
 653     }
 654
 655     SDL_LockSurface( p_vout->p_sys->p_display );
 656
 657     if( ( psz_chroma = config_GetPsz( p_vout, "sdl-chroma" ) ) )
 658     {
 659         if( strlen( psz_chroma ) >= 4 )
 660         {
 661             memcpy(&i_chroma, psz_chroma, 4);
 662             msg_Dbg( p_vout, "Forcing chroma to 0x%.8x (%4.4s)", i_chroma, (char*)&i_chroma );
 663         }
 664         else
 665         {
 666             free( psz_chroma );
 667             psz_chroma = NULL;
 668         }
 669     }
 670
 671     /* Choose the chroma we will try first. */
 672     do
 673     {
 674         if( !psz_chroma ) i_chroma = 0;
 675         switch( i_chroma ? i_chroma : p_vout->render.i_chroma )
 676         {
 677             case VLC_FOURCC('Y','U','Y','2'):
 678             case VLC_FOURCC('Y','U','N','V'):
 679                 p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 680                 i_sdl_chroma = SDL_YUY2_OVERLAY;
 681                 break;
 682             case VLC_FOURCC('U','Y','V','Y'):
 683             case VLC_FOURCC('U','Y','N','V'):
 684             case VLC_FOURCC('Y','4','2','2'):
 685                 p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 686                 i_sdl_chroma = SDL_UYVY_OVERLAY;
 687                 break;
 688             case VLC_FOURCC('Y','V','Y','U'):
 689                 p_vout->output.i_chroma = VLC_FOURCC('Y','V','Y','U');
 690                 i_sdl_chroma = SDL_YVYU_OVERLAY;
 691                 break;
 692             case VLC_FOURCC('Y','V','1','2'):
 693             case VLC_FOURCC('I','4','2','0'):
 694             case VLC_FOURCC('I','Y','U','V'):
 695             default:
 696                 p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 697                 i_sdl_chroma = SDL_YV12_OVERLAY;
 698                 break;
 699         }
 700         free( psz_chroma ); psz_chroma = NULL;
 701
 702         p_vout->p_sys->p_overlay =
 703             SDL_CreateYUVOverlay( 32, 32, i_sdl_chroma,
 704                                   p_vout->p_sys->p_display );
 705         /* FIXME: if the first overlay we find is software, don't stop,
 706          * because we may find a hardware one later ... */
 707     }
 708     while( i_chroma && !p_vout->p_sys->p_overlay );
 709
 710
 711     /* If this best choice failed, fall back to other chromas */
 712     if( p_vout->p_sys->p_overlay == NULL )
 713     {
 714         p_vout->output.i_chroma = VLC_FOURCC('I','Y','U','V');
 715         p_vout->p_sys->p_overlay =
 716             SDL_CreateYUVOverlay( 32, 32, SDL_IYUV_OVERLAY,
 717                                   p_vout->p_sys->p_display );
 718     }
 719
 720     if( p_vout->p_sys->p_overlay == NULL )
 721     {
 722         p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
 723         p_vout->p_sys->p_overlay =
 724             SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 725                                   p_vout->p_sys->p_display );
 726     }
 727
 728     if( p_vout->p_sys->p_overlay == NULL )
 729     {
 730         p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 731         p_vout->p_sys->p_overlay =
 732             SDL_CreateYUVOverlay( 32, 32, SDL_YUY2_OVERLAY,
 733                                   p_vout->p_sys->p_display );
 734     }
 735
 736     if( p_vout->p_sys->p_overlay == NULL )
 737     {
 738         msg_Warn( p_vout, "no SDL overlay for 0x%.8x (%4.4s)",
 739                   p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma );
 740
 741         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 742         {
 743             case 8:
 744                 p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
 745                 p_vout->output.pf_setpalette = SetPalette;
 746                 break;
 747             case 15:
 748                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5');
 749                 break;
 750             case 16:
 751                 p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 752                 break;
 753             case 24:
 754                 p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 755                 break;
 756             case 32:
 757                 p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 758                 break;
 759             default:
 760                 msg_Err( p_vout, "unknown screen depth %i",
 761                          p_vout->p_sys->p_display->format->BitsPerPixel );
 762                 SDL_UnlockSurface( p_vout->p_sys->p_display );
 763                 SDL_FreeSurface( p_vout->p_sys->p_display );
 764                 return VLC_EGENERIC;
 765         }
 766
 767         p_vout->output.i_rmask = p_vout->p_sys->p_display->format->Rmask;
 768         p_vout->output.i_gmask = p_vout->p_sys->p_display->format->Gmask;
 769         p_vout->output.i_bmask = p_vout->p_sys->p_display->format->Bmask;
 770
 771         SDL_WM_SetCaption( VOUT_TITLE " (software RGB SDL output)",
 772                            VOUT_TITLE " (software RGB SDL output)" );
 773     }
 774     else
 775     {
 776         if( p_vout->p_sys->p_overlay->hw_overlay )
 777         {
 778             SDL_WM_SetCaption( VOUT_TITLE " (hardware YUV SDL output)",
 779                                VOUT_TITLE " (hardware YUV SDL output)" );
 780         }
 781         else
 782         {
 783             SDL_WM_SetCaption( VOUT_TITLE " (software YUV SDL output)",
 784                                VOUT_TITLE " (software YUV SDL output)" );
 785         }
 786     }
 787
 788     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 789
 790     return VLC_SUCCESS;
 791 }
 792
 793 /*****************************************************************************
 794  * CloseDisplay: close and reset SDL device
 795  *****************************************************************************
 796  * This function returns all resources allocated by OpenDisplay and restore
 797  * the original state of the device.
 798  *****************************************************************************/
 799 static void CloseDisplay( vout_thread_t *p_vout )
 800 {
 801     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 802     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 803     SDL_FreeSurface( p_vout->p_sys->p_display );
 804 }
 805
 806 /*****************************************************************************
 807  * NewPicture: allocate a picture
 808  *****************************************************************************
 809  * Returns 0 on success, -1 otherwise
 810  *****************************************************************************/
 811 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 812 {
 813     int i_width  = p_vout->output.i_width;
 814     int i_height = p_vout->output.i_height;
 815
 816     if( p_vout->p_sys->p_overlay == NULL )
 817     {
 818         /* RGB picture */
 819         if( p_vout->p_sys->i_surfaces )
 820         {
 821             /* We already allocated this surface, return */
 822             return VLC_EGENERIC;
 823         }
 824
 825         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 826
 827         if( p_pic->p_sys == NULL )
 828         {
 829             return VLC_ENOMEM;
 830         }
 831
 832         switch( p_vout->p_sys->p_display->format->BitsPerPixel )
 833         {
 834             case 8:
 835                 p_pic->p->i_pixel_pitch = 1;
 836                 break;
 837             case 15:
 838             case 16:
 839                 p_pic->p->i_pixel_pitch = 2;
 840                 break;
 841             case 24:
 842             case 32:
 843                 p_pic->p->i_pixel_pitch = 4;
 844                 break;
 845             default:
 846                 return VLC_EGENERIC;
 847         }
 848
 849         p_pic->p->p_pixels = p_vout->p_sys->p_display->pixels;
 850         p_pic->p->i_lines = p_vout->p_sys->p_display->h;
 851         p_pic->p->i_visible_lines = p_vout->p_sys->p_display->h;
 852         p_pic->p->i_pitch = p_vout->p_sys->p_display->pitch;
 853         p_pic->p->i_visible_pitch =
 854             p_pic->p->i_pixel_pitch * p_vout->p_sys->p_display->w;
 855
 856         p_vout->p_sys->i_surfaces++;
 857
 858         p_pic->i_planes = 1;
 859     }
 860     else
 861     {
 862         p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 863
 864         if( p_pic->p_sys == NULL )
 865         {
 866             return VLC_ENOMEM;
 867         }
 868
 869         p_pic->p_sys->p_overlay =
 870             SDL_CreateYUVOverlay( i_width, i_height,
 871                                   p_vout->output.i_chroma,
 872                                   p_vout->p_sys->p_display );
 873
 874         if( p_pic->p_sys->p_overlay == NULL )
 875         {
 876             free( p_pic->p_sys );
 877             return VLC_EGENERIC;
 878         }
 879
 880         SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 881
 882         p_pic->Y_PIXELS = p_pic->p_sys->p_overlay->pixels[0];
 883         p_pic->p[Y_PLANE].i_lines = p_pic->p_sys->p_overlay->h;
 884         p_pic->p[Y_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h;
 885         p_pic->p[Y_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[0];
 886
 887         switch( p_vout->output.i_chroma )
 888         {
 889         case SDL_YV12_OVERLAY:
 890             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 891             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 892
 893             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 894             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 895             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 896             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 897             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 898             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 899
 900             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 901             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 902             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 903             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 904             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 905             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 906
 907             p_pic->i_planes = 3;
 908             break;
 909
 910         case SDL_IYUV_OVERLAY:
 911             p_pic->p[Y_PLANE].i_pixel_pitch = 1;
 912             p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;
 913
 914             p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
 915             p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 916             p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 917             p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
 918             p_pic->p[U_PLANE].i_pixel_pitch = 1;
 919             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 920
 921             p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
 922             p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
 923             p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
 924             p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
 925             p_pic->p[V_PLANE].i_pixel_pitch = 1;
 926             p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;
 927
 928             p_pic->i_planes = 3;
 929             break;
 930
 931         default:
 932             p_pic->p[Y_PLANE].i_pixel_pitch = 2;
 933             p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w * 2;
 934
 935             p_pic->i_planes = 1;
 936             break;
 937         }
 938     }
 939
 940     return VLC_SUCCESS;
 941 }
 942
 943 /*****************************************************************************
 944  * SetPalette: sets an 8 bpp palette
 945  *****************************************************************************/
 946 static void SetPalette( vout_thread_t *p_vout,
 947                         uint16_t *red, uint16_t *green, uint16_t *blue )
 948 {
 949     SDL_Color colors[256];
 950     int i;
 951
 952     /* Fill colors with color information */
 953     for( i = 0; i < 256; i++ )
 954     {
 955         colors[ i ].r = red[ i ] >> 8;
 956         colors[ i ].g = green[ i ] >> 8;
 957         colors[ i ].b = blue[ i ] >> 8;
 958     }
 959
 960     /* Set palette */
 961     if( SDL_SetColors( p_vout->p_sys->p_display, colors, 0, 256 ) == 0 )
 962     {
 963         msg_Err( p_vout, "failed to set palette" );
 964     }
 965 }
 966