git.sesse.net Git - vlc/blob - plugins/sdl/vout_sdl.c

   1 /*****************************************************************************
   2  * vout_sdl.c: SDL video output display method
   3  *****************************************************************************
   4  * Copyright (C) 1998-2001 VideoLAN
   5  * $Id: vout_sdl.c,v 1.73 2001/12/20 15:43:15 sam Exp $
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Pierre Baillet <oct@zoy.org>
   9  *          Arnaud de Bossoreille de Ribou <bozo@via.ecp.fr>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  24  *****************************************************************************/
  25
  26 #define MODULE_NAME sdl
  27 #include "modules_inner.h"
  28
  29 /*****************************************************************************
  30  * Preamble
  31  *****************************************************************************/
  32 #include "defs.h"
  33
  34 #include <errno.h>                                                 /* ENOMEM */
  35 #include <stdlib.h>                                                /* free() */
  36 #include <string.h>                                            /* strerror() */
  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 #include "common.h"
  46 #include "intf_msg.h"
  47 #include "threads.h"
  48 #include "mtime.h"
  49 #include "netutils.h"
  50 #include "tests.h"
  51
  52 #include "video.h"
  53 #include "video_output.h"
  54
  55 #include "interface.h"
  56
  57 #include "stream_control.h"                 /* needed by input_ext-intf.h... */
  58 #include "input_ext-intf.h"
  59
  60 #include "modules.h"
  61 #include "modules_export.h"
  62
  63 #define SDL_MAX_DIRECTBUFFERS 5
  64 #define SDL_DEFAULT_BPP 16
  65
  66 /*****************************************************************************
  67  * vout_sys_t: video output SDL method descriptor
  68  *****************************************************************************
  69  * This structure is part of the video output thread descriptor.
  70  * It describes the SDL specific properties of an output thread.
  71  *****************************************************************************/
  72 typedef struct vout_sys_s
  73 {
  74     SDL_Surface *   p_display;                             /* display device */
  75     SDL_Overlay *   p_overlay; /* An overlay we keep to grab the XVideo port */
  76
  77     int i_width;
  78     int i_height;
  79
  80     boolean_t   b_cursor;
  81     boolean_t   b_cursor_autohidden;
  82     mtime_t     i_lastmoved;
  83
  84 } vout_sys_t;
  85
  86 /*****************************************************************************
  87  * picture_sys_t: direct buffer method descriptor
  88  *****************************************************************************
  89  * This structure is part of the picture descriptor, it describes the
  90  * SDL specific properties of a direct buffer.
  91  *****************************************************************************/
  92 typedef struct picture_sys_s
  93 {
  94     SDL_Overlay *p_overlay;
  95
  96 } picture_sys_t;
  97
  98 /*****************************************************************************
  99  * Local prototypes.
 100  *****************************************************************************/
 101 static int  vout_Probe      ( probedata_t *p_data );
 102 static int  vout_Create     ( struct vout_thread_s * );
 103 static int  vout_Init       ( struct vout_thread_s * );
 104 static void vout_End        ( struct vout_thread_s * );
 105 static void vout_Destroy    ( struct vout_thread_s * );
 106 static int  vout_Manage     ( struct vout_thread_s * );
 107 static void vout_Display    ( struct vout_thread_s *, struct picture_s * );
 108
 109 static int  SDLOpenDisplay      ( vout_thread_t *p_vout );
 110 static void SDLCloseDisplay     ( vout_thread_t *p_vout );
 111 static int  SDLNewPicture       ( vout_thread_t *p_vout, picture_t *p_pic );
 112
 113 /*****************************************************************************
 114  * Functions exported as capabilities. They are declared as static so that
 115  * we don't pollute the namespace too much.
 116  *****************************************************************************/
 117 void _M( vout_getfunctions )( function_list_t * p_function_list )
 118 {
 119     p_function_list->pf_probe = vout_Probe;
 120     p_function_list->functions.vout.pf_create     = vout_Create;
 121     p_function_list->functions.vout.pf_init       = vout_Init;
 122     p_function_list->functions.vout.pf_end        = vout_End;
 123     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 124     p_function_list->functions.vout.pf_manage     = vout_Manage;
 125     p_function_list->functions.vout.pf_display    = vout_Display;
 126     p_function_list->functions.vout.pf_setpalette = NULL;
 127 }
 128
 129 /*****************************************************************************
 130  * vout_Probe: probe the video driver and return a score
 131  *****************************************************************************
 132  * This function tries to initialize SDL and returns a score to the
 133  * plugin manager so that it can select the best plugin.
 134  *****************************************************************************/
 135 static int vout_Probe( probedata_t *p_data )
 136 {
 137     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
 138     {
 139         return( 0 );
 140     }
 141
 142     if( TestMethod( VOUT_METHOD_VAR, "sdl" ) )
 143     {
 144         return( 999 );
 145     }
 146
 147     return( 100 );
 148 }
 149
 150 /*****************************************************************************
 151  * vout_Create: allocate SDL video thread output method
 152  *****************************************************************************
 153  * This function allocate and initialize a SDL vout method. It uses some of the
 154  * vout properties to choose the correct mode, and change them according to the
 155  * mode actually used.
 156  *****************************************************************************/
 157 static int vout_Create( vout_thread_t *p_vout )
 158 {
 159     /* Allocate structure */
 160     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 161     if( p_vout->p_sys == NULL )
 162     {
 163         intf_ErrMsg( "vout error: can't create p_sys (%s)", strerror(ENOMEM) );
 164         return( 1 );
 165     }
 166
 167     /* Initialize library */
 168     if( SDL_Init( SDL_INIT_VIDEO
 169 #ifndef WIN32
 170     /* Win32 SDL implementation doesn't support SDL_INIT_EVENTTHREAD yet*/
 171                 | SDL_INIT_EVENTTHREAD
 172 #endif
 173 #ifdef DEBUG
 174     /* In debug mode you may want vlc to dump a core instead of staying
 175      * stuck */
 176                 | SDL_INIT_NOPARACHUTE
 177 #endif
 178                 ) < 0 )
 179     {
 180         intf_ErrMsg( "vout error: can't initialize SDL (%s)", SDL_GetError() );
 181         free( p_vout->p_sys );
 182         return( 1 );
 183     }
 184
 185     p_vout->p_sys->b_cursor = 1; /* TODO should be done with a main_GetInt.. */
 186     p_vout->p_sys->b_cursor_autohidden = 0;
 187     p_vout->p_sys->i_lastmoved = mdate();
 188
 189     if( p_vout->render.i_height * p_vout->render.i_aspect
 190          >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
 191     {
 192         p_vout->p_sys->i_width = p_vout->render.i_height
 193             * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 194         p_vout->p_sys->i_height = p_vout->render.i_height;
 195     }
 196     else
 197     {
 198         p_vout->p_sys->i_width = p_vout->render.i_width;
 199         p_vout->p_sys->i_height = p_vout->render.i_width
 200             * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 201     }
 202
 203     if( p_vout->p_sys->i_width <= 300 && p_vout->p_sys->i_height <= 300 )
 204     {
 205         p_vout->p_sys->i_width <<= 1;
 206         p_vout->p_sys->i_height <<= 1;
 207     }
 208     else if( p_vout->p_sys->i_width <= 400 && p_vout->p_sys->i_height <= 400 )
 209     {
 210         p_vout->p_sys->i_width += p_vout->p_sys->i_width >> 1;
 211         p_vout->p_sys->i_height += p_vout->p_sys->i_height >> 1;
 212     }
 213
 214     if( SDLOpenDisplay( p_vout ) )
 215     {
 216         intf_ErrMsg( "vout error: can't set up SDL (%s)", SDL_GetError() );
 217         SDL_QuitSubSystem( SDL_INIT_VIDEO );
 218         free( p_vout->p_sys );
 219         return( 1 );
 220     }
 221
 222     return( 0 );
 223 }
 224
 225 /*****************************************************************************
 226  * vout_Init: initialize SDL video thread output method
 227  *****************************************************************************
 228  * This function initialize the SDL display device.
 229  *****************************************************************************/
 230 static int vout_Init( vout_thread_t *p_vout )
 231 {
 232     int i_index;
 233     picture_t *p_pic;
 234
 235     I_OUTPUTPICTURES = 0;
 236
 237     /* Initialize the output structure */
 238     switch( p_vout->render.i_chroma )
 239     {
 240         case YUV_420_PICTURE:
 241             p_vout->output.i_chroma = p_vout->render.i_chroma;
 242             p_vout->output.i_width  = p_vout->render.i_width;
 243             p_vout->output.i_height = p_vout->render.i_height;
 244             p_vout->output.i_aspect = p_vout->render.i_aspect;
 245             break;
 246
 247         default:
 248             return( 0 );
 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 || SDLNewPicture( 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         p_pic->i_left_margin   =
 276         p_pic->i_right_margin  =
 277         p_pic->i_top_margin    =
 278         p_pic->i_bottom_margin = 0;
 279
 280         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 281
 282         I_OUTPUTPICTURES++;
 283     }
 284
 285     return( 0 );
 286 }
 287
 288 /*****************************************************************************
 289  * vout_End: terminate Sys video thread output method
 290  *****************************************************************************
 291  * Terminate an output method created by vout_SDLCreate
 292  *****************************************************************************/
 293 static void vout_End( vout_thread_t *p_vout )
 294 {
 295     int i_index;
 296
 297     /* Free the output buffers we allocated */
 298     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 299     {
 300         i_index--;
 301         SDL_UnlockYUVOverlay( PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 302         SDL_FreeYUVOverlay( PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 303         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 304     }
 305 }
 306
 307 /*****************************************************************************
 308  * vout_Destroy: destroy Sys video thread output method
 309  *****************************************************************************
 310  * Terminate an output method created by vout_SDLCreate
 311  *****************************************************************************/
 312 static void vout_Destroy( vout_thread_t *p_vout )
 313 {
 314     SDLCloseDisplay( p_vout );
 315
 316     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 317
 318     free( p_vout->p_sys );
 319 }
 320
 321 static __inline__ void vout_Seek( off_t i_seek )
 322 {
 323 #define area p_main->p_intf->p_input->stream.p_selected_area
 324     off_t i_tell = area->i_tell;
 325
 326     i_tell += i_seek * (off_t)50 * p_main->p_intf->p_input->stream.i_mux_rate;
 327
 328     i_tell = ( i_tell <= area->i_start ) ? area->i_start
 329            : ( i_tell >= area->i_size ) ? area->i_size
 330            : i_tell;
 331
 332     input_Seek( p_main->p_intf->p_input, i_tell );
 333 #undef area
 334 }
 335
 336 /*****************************************************************************
 337  * vout_Manage: handle Sys events
 338  *****************************************************************************
 339  * This function should be called regularly by video output thread. It returns
 340  * a non null value if an error occured.
 341  *****************************************************************************/
 342 static int vout_Manage( vout_thread_t *p_vout )
 343 {
 344     SDL_Event event;                                            /* SDL event */
 345
 346     /* Process events */
 347     while( SDL_PollEvent(&event) )
 348     {
 349         switch( event.type )
 350         {
 351         case SDL_VIDEORESIZE:                          /* Resizing of window */
 352             p_vout->p_sys->i_width = event.resize.w;
 353             p_vout->p_sys->i_height = event.resize.h;
 354             SDLCloseDisplay( p_vout );
 355             SDLOpenDisplay( p_vout );
 356             break;
 357
 358         case SDL_MOUSEMOTION:
 359             if( p_vout->p_sys->b_cursor &&
 360                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 361             {
 362                 if( p_vout->p_sys->b_cursor_autohidden )
 363                 {
 364                     p_vout->p_sys->b_cursor_autohidden = 0;
 365                     SDL_ShowCursor( 1 );
 366                 }
 367                 else
 368                 {
 369                     p_vout->p_sys->i_lastmoved = mdate();
 370                 }
 371             }
 372             break;
 373
 374         case SDL_MOUSEBUTTONUP:
 375             switch( event.button.button )
 376             {
 377             case SDL_BUTTON_RIGHT:
 378                 p_main->p_intf->b_menu_change = 1;
 379                 break;
 380             }
 381             break;
 382
 383         case SDL_MOUSEBUTTONDOWN:
 384             switch( event.button.button )
 385             {
 386             case SDL_BUTTON_LEFT:
 387                 /* In this part we will eventually manage
 388                  * clicks for DVD navigation for instance. For the
 389                  * moment just pause the stream. */
 390                 input_SetStatus( p_main->p_intf->p_input, INPUT_STATUS_PAUSE );
 391                 break;
 392
 393             case 4:
 394                 vout_Seek( 15 );
 395                 break;
 396
 397             case 5:
 398                 vout_Seek( -15 );
 399                 break;
 400             }
 401             break;
 402
 403         case SDL_QUIT:
 404             p_main->p_intf->b_die = 1;
 405             break;
 406
 407         case SDL_KEYDOWN:                             /* if a key is pressed */
 408
 409             switch( event.key.keysym.sym )
 410             {
 411             case SDLK_q:                                             /* quit */
 412             case SDLK_ESCAPE:
 413                 p_main->p_intf->b_die = 1;
 414                 break;
 415
 416             case SDLK_f:                             /* switch to fullscreen */
 417                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 418                 break;
 419
 420             case SDLK_c:                                 /* toggle grayscale */
 421                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 422                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 423                 break;
 424
 425             case SDLK_i:                                      /* toggle info */
 426                 p_vout->b_info = ! p_vout->b_info;
 427                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 428                 break;
 429
 430             case SDLK_s:                                   /* toggle scaling */
 431                 p_vout->b_scale = ! p_vout->b_scale;
 432                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 433                 break;
 434
 435             case SDLK_SPACE:                             /* toggle interface */
 436                 p_vout->b_interface = ! p_vout->b_interface;
 437                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 438                 break;
 439
 440             case SDLK_MENU:
 441                 p_main->p_intf->b_menu_change = 1;
 442                 break;
 443
 444             case SDLK_LEFT:
 445                 vout_Seek( -5 );
 446                 break;
 447
 448             case SDLK_RIGHT:
 449                 vout_Seek( 5 );
 450                 break;
 451
 452             case SDLK_UP:
 453                 vout_Seek( 60 );
 454                 break;
 455
 456             case SDLK_DOWN:
 457                 vout_Seek( -60 );
 458                 break;
 459
 460             case SDLK_F10: network_ChannelJoin( 0 ); break;
 461             case SDLK_F1:  network_ChannelJoin( 1 ); break;
 462             case SDLK_F2:  network_ChannelJoin( 2 ); break;
 463             case SDLK_F3:  network_ChannelJoin( 3 ); break;
 464             case SDLK_F4:  network_ChannelJoin( 4 ); break;
 465             case SDLK_F5:  network_ChannelJoin( 5 ); break;
 466             case SDLK_F6:  network_ChannelJoin( 6 ); break;
 467             case SDLK_F7:  network_ChannelJoin( 7 ); break;
 468             case SDLK_F8:  network_ChannelJoin( 8 ); break;
 469             case SDLK_F9:  network_ChannelJoin( 9 ); break;
 470
 471             default:
 472                 intf_DbgMsg( "unhandled key %i", event.key.keysym.sym );
 473                 break;
 474             }
 475             break;
 476
 477         default:
 478             break;
 479         }
 480     }
 481
 482     /* Fullscreen change */
 483     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 484     {
 485         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 486
 487         SDL_WM_ToggleFullScreen(p_vout->p_sys->p_display);
 488
 489         p_vout->p_sys->b_cursor_autohidden = 0;
 490         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 491                         ! p_vout->p_sys->b_cursor_autohidden );
 492
 493         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 494     }
 495
 496     /* Pointer change */
 497     if( ! p_vout->p_sys->b_cursor_autohidden &&
 498         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 499     {
 500         /* Hide the mouse automatically */
 501         p_vout->p_sys->b_cursor_autohidden = 1;
 502         SDL_ShowCursor( 0 );
 503     }
 504
 505     return( 0 );
 506 }
 507
 508 /*****************************************************************************
 509  * vout_Display: displays previously rendered output
 510  *****************************************************************************
 511  * This function sends the currently rendered image to the display.
 512  *****************************************************************************/
 513 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 514 {
 515     int x, y, w, h;
 516     SDL_Rect disp;
 517
 518     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 519                        &x, &y, &w, &h );
 520     disp.x = x;
 521     disp.y = y;
 522     disp.w = w;
 523     disp.h = h;
 524
 525     SDL_UnlockYUVOverlay( p_pic->p_sys->p_overlay);
 526     SDL_DisplayYUVOverlay( p_pic->p_sys->p_overlay , &disp );
 527     SDL_LockYUVOverlay( p_pic->p_sys->p_overlay);
 528 }
 529
 530 /* following functions are local */
 531
 532 /*****************************************************************************
 533  * SDLOpenDisplay: open and initialize SDL device
 534  *****************************************************************************
 535  * Open and initialize display according to preferences specified in the vout
 536  * thread fields.
 537  *****************************************************************************/
 538 static int SDLOpenDisplay( vout_thread_t *p_vout )
 539 {
 540     Uint32 i_flags;
 541     int    i_bpp;
 542
 543     /* Initialize flags and cursor */
 544     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE;
 545     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 546
 547     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 548                              SDL_DEFAULT_BPP, i_flags );
 549     if( i_bpp == 0 )
 550     {
 551         intf_ErrMsg( "vout error: no video mode available" );
 552         return( 1 );
 553     }
 554
 555     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 556                                                  p_vout->p_sys->i_height,
 557                                                  i_bpp, i_flags );
 558
 559     if( p_vout->p_sys->p_display == NULL )
 560     {
 561         intf_ErrMsg( "vout error: cannot set video mode" );
 562         return( 1 );
 563     }
 564
 565     SDL_LockSurface( p_vout->p_sys->p_display );
 566
 567     p_vout->p_sys->p_overlay =
 568         SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 569                               p_vout->p_sys->p_display );
 570
 571     if( p_vout->p_sys->p_overlay == NULL )
 572     {
 573         intf_ErrMsg( "vout error: cannot set overlay" );
 574         SDL_UnlockSurface( p_vout->p_sys->p_display );
 575         SDL_FreeSurface( p_vout->p_sys->p_display );
 576         return( 1 );
 577     }
 578
 579     if( p_vout->p_sys->p_overlay->hw_overlay )
 580     {
 581         SDL_WM_SetCaption( VOUT_TITLE " (hardware SDL output)",
 582                            VOUT_TITLE " (hardware SDL output)" );
 583     }
 584     else
 585     {
 586         SDL_WM_SetCaption( VOUT_TITLE " (software SDL output)",
 587                            VOUT_TITLE " (software SDL output)" );
 588     }
 589
 590     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 591
 592     return( 0 );
 593 }
 594
 595 /*****************************************************************************
 596  * SDLCloseDisplay: close and reset SDL device
 597  *****************************************************************************
 598  * This function returns all resources allocated by SDLOpenDisplay and restore
 599  * the original state of the device.
 600  *****************************************************************************/
 601 static void SDLCloseDisplay( vout_thread_t *p_vout )
 602 {
 603     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 604     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 605     SDL_FreeSurface( p_vout->p_sys->p_display );
 606 }
 607
 608 /*****************************************************************************
 609  * SDLNewPicture: allocate a picture
 610  *****************************************************************************
 611  * Returns 0 on success, -1 otherwise
 612  *****************************************************************************/
 613 static int SDLNewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 614 {
 615     int i_width  = p_vout->output.i_width;
 616     int i_height = p_vout->output.i_height;
 617
 618     switch( p_vout->output.i_chroma )
 619     {
 620         case YUV_420_PICTURE:
 621             /* We know this chroma, allocate a buffer which will be used
 622              * directly by the decoder */
 623             p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 624
 625             if( p_pic->p_sys == NULL )
 626             {
 627                 return -1;
 628             }
 629
 630             p_pic->p_sys->p_overlay =
 631                 SDL_CreateYUVOverlay( i_width, i_height,
 632                                       SDL_YV12_OVERLAY,
 633                                       p_vout->p_sys->p_display );
 634
 635             if( p_pic->p_sys->p_overlay == NULL )
 636             {
 637                 free( p_pic->p_sys );
 638                 return -1;
 639             }
 640
 641             SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 642
 643             /* Precalculate some values */
 644             p_pic->i_size         = i_width * i_height;
 645             p_pic->i_chroma_width = i_width / 2;
 646             p_pic->i_chroma_size  = i_height * ( i_width / 2 );
 647
 648             /* FIXME: try to get the right i_bytes value from p_overlay */
 649             p_pic->planes[ Y_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 0 ];
 650             p_pic->planes[ Y_PLANE ].i_bytes = p_pic->i_size * sizeof( u8 );
 651             p_pic->planes[ Y_PLANE ].i_line_bytes = i_width * sizeof( u8 );
 652
 653             p_pic->planes[ U_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 2 ];
 654             p_pic->planes[ U_PLANE ].i_bytes = p_pic->i_size * sizeof( u8 ) / 4;
 655             p_pic->planes[ U_PLANE ].i_line_bytes = p_pic->i_chroma_width * sizeof( u8 );
 656
 657             p_pic->planes[ V_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 1 ];
 658             p_pic->planes[ V_PLANE ].i_bytes = p_pic->i_size * sizeof( u8 ) / 4;
 659             p_pic->planes[ V_PLANE ].i_line_bytes = p_pic->i_chroma_width * sizeof( u8 );
 660
 661             p_pic->i_planes = 3;
 662
 663             return 0;
 664
 665         default:
 666             /* Unknown chroma, tell the guy to get lost */
 667             p_pic->i_planes = 0;
 668
 669             return 0;
 670     }
 671 }
 672