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