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 1.71 2001/12/19 03:50:22 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 "tests.h"
  50
  51 #include "video.h"
  52 #include "video_output.h"
  53
  54 #include "interface.h"
  55
  56 #include "modules.h"
  57 #include "modules_export.h"
  58
  59 #define SDL_MAX_DIRECTBUFFERS 5
  60 #define SDL_DEFAULT_BPP 16
  61
  62 /*****************************************************************************
  63  * vout_sys_t: video output SDL method descriptor
  64  *****************************************************************************
  65  * This structure is part of the video output thread descriptor.
  66  * It describes the SDL specific properties of an output thread.
  67  *****************************************************************************/
  68 typedef struct vout_sys_s
  69 {
  70     SDL_Surface *   p_display;                             /* display device */
  71     SDL_Overlay *   p_overlay; /* An overlay we keep to grab the XVideo port */
  72
  73     int i_width;
  74     int i_height;
  75
  76     boolean_t   b_cursor;
  77     boolean_t   b_cursor_autohidden;
  78     mtime_t     i_lastmoved;
  79
  80 } vout_sys_t;
  81
  82 /*****************************************************************************
  83  * picture_sys_t: direct buffer method descriptor
  84  *****************************************************************************
  85  * This structure is part of the picture descriptor, it describes the
  86  * SDL specific properties of a direct buffer.
  87  *****************************************************************************/
  88 typedef struct picture_sys_s
  89 {
  90     SDL_Overlay *p_overlay;
  91
  92 } picture_sys_t;
  93
  94 /*****************************************************************************
  95  * Local prototypes.
  96  *****************************************************************************/
  97 static int  vout_Probe      ( probedata_t *p_data );
  98 static int  vout_Create     ( struct vout_thread_s * );
  99 static int  vout_Init       ( struct vout_thread_s * );
 100 static void vout_End        ( struct vout_thread_s * );
 101 static void vout_Destroy    ( struct vout_thread_s * );
 102 static int  vout_Manage     ( struct vout_thread_s * );
 103 static void vout_Display    ( struct vout_thread_s *, struct picture_s * );
 104
 105 static int  SDLOpenDisplay      ( vout_thread_t *p_vout );
 106 static void SDLCloseDisplay     ( vout_thread_t *p_vout );
 107 static int  SDLNewPicture       ( vout_thread_t *p_vout, picture_t *p_pic );
 108
 109 /*****************************************************************************
 110  * Functions exported as capabilities. They are declared as static so that
 111  * we don't pollute the namespace too much.
 112  *****************************************************************************/
 113 void _M( vout_getfunctions )( function_list_t * p_function_list )
 114 {
 115     p_function_list->pf_probe = vout_Probe;
 116     p_function_list->functions.vout.pf_create     = vout_Create;
 117     p_function_list->functions.vout.pf_init       = vout_Init;
 118     p_function_list->functions.vout.pf_end        = vout_End;
 119     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 120     p_function_list->functions.vout.pf_manage     = vout_Manage;
 121     p_function_list->functions.vout.pf_display    = vout_Display;
 122     p_function_list->functions.vout.pf_setpalette = NULL;
 123 }
 124
 125 /*****************************************************************************
 126  * vout_Probe: probe the video driver and return a score
 127  *****************************************************************************
 128  * This function tries to initialize SDL and returns a score to the
 129  * plugin manager so that it can select the best plugin.
 130  *****************************************************************************/
 131 static int vout_Probe( probedata_t *p_data )
 132 {
 133     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
 134     {
 135         return( 0 );
 136     }
 137
 138     if( TestMethod( VOUT_METHOD_VAR, "sdl" ) )
 139     {
 140         return( 999 );
 141     }
 142
 143     return( 100 );
 144 }
 145
 146 /*****************************************************************************
 147  * vout_Create: allocate SDL video thread output method
 148  *****************************************************************************
 149  * This function allocate and initialize a SDL vout method. It uses some of the
 150  * vout properties to choose the correct mode, and change them according to the
 151  * mode actually used.
 152  *****************************************************************************/
 153 static int vout_Create( vout_thread_t *p_vout )
 154 {
 155     /* Allocate structure */
 156     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 157     if( p_vout->p_sys == NULL )
 158     {
 159         intf_ErrMsg( "vout error: can't create p_sys (%s)", strerror(ENOMEM) );
 160         return( 1 );
 161     }
 162
 163     /* Initialize library */
 164     if( SDL_Init( SDL_INIT_VIDEO
 165 #ifndef WIN32
 166     /* Win32 SDL implementation doesn't support SDL_INIT_EVENTTHREAD yet*/
 167                 | SDL_INIT_EVENTTHREAD
 168 #endif
 169 #ifdef DEBUG
 170     /* In debug mode you may want vlc to dump a core instead of staying
 171      * stuck */
 172                 | SDL_INIT_NOPARACHUTE
 173 #endif
 174                 ) < 0 )
 175     {
 176         intf_ErrMsg( "vout error: can't initialize SDL (%s)", SDL_GetError() );
 177         free( p_vout->p_sys );
 178         return( 1 );
 179     }
 180
 181     p_vout->p_sys->b_cursor = 1; /* TODO should be done with a main_GetInt.. */
 182     p_vout->p_sys->b_cursor_autohidden = 0;
 183     p_vout->p_sys->i_lastmoved = mdate();
 184
 185     if( p_vout->render.i_height * p_vout->render.i_aspect
 186          >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
 187     {
 188         p_vout->p_sys->i_width = p_vout->render.i_height
 189             * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 190         p_vout->p_sys->i_height = p_vout->render.i_height;
 191     }
 192     else
 193     {
 194         p_vout->p_sys->i_width = p_vout->render.i_width;
 195         p_vout->p_sys->i_height = p_vout->render.i_width
 196             * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 197     }
 198
 199     if( p_vout->p_sys->i_width <= 300 && p_vout->p_sys->i_height <= 200 )
 200     {
 201         p_vout->p_sys->i_width <<= 1;
 202         p_vout->p_sys->i_height <<= 1;
 203     }
 204     else if( p_vout->p_sys->i_width <= 400 && p_vout->p_sys->i_height <= 300 )
 205     {
 206         p_vout->p_sys->i_width += p_vout->p_sys->i_width >> 1;
 207         p_vout->p_sys->i_height += p_vout->p_sys->i_height >> 1;
 208     }
 209
 210     if( SDLOpenDisplay( p_vout ) )
 211     {
 212         intf_ErrMsg( "vout error: can't set up SDL (%s)", SDL_GetError() );
 213         SDL_QuitSubSystem( SDL_INIT_VIDEO );
 214         free( p_vout->p_sys );
 215         return( 1 );
 216     }
 217
 218     return( 0 );
 219 }
 220
 221 /*****************************************************************************
 222  * vout_Init: initialize SDL video thread output method
 223  *****************************************************************************
 224  * This function initialize the SDL display device.
 225  *****************************************************************************/
 226 static int vout_Init( vout_thread_t *p_vout )
 227 {
 228     int i_index;
 229     picture_t *p_pic;
 230
 231     I_OUTPUTPICTURES = 0;
 232
 233     /* Initialize the output structure */
 234     switch( p_vout->render.i_chroma )
 235     {
 236         case YUV_420_PICTURE:
 237             p_vout->output.i_chroma = p_vout->render.i_chroma;
 238             p_vout->output.i_width  = p_vout->render.i_width;
 239             p_vout->output.i_height = p_vout->render.i_height;
 240             p_vout->output.i_aspect = p_vout->render.i_aspect;
 241             break;
 242
 243         default:
 244             return( 0 );
 245     }
 246
 247     /* Try to initialize SDL_MAX_DIRECTBUFFERS direct buffers */
 248     while( I_OUTPUTPICTURES < SDL_MAX_DIRECTBUFFERS )
 249     {
 250         p_pic = NULL;
 251
 252         /* Find an empty picture slot */
 253         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 254         {
 255             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 256             {
 257                 p_pic = p_vout->p_picture + i_index;
 258                 break;
 259             }
 260         }
 261
 262         /* Allocate the picture if we found one */
 263         if( p_pic == NULL || SDLNewPicture( p_vout, p_pic ) )
 264         {
 265             break;
 266         }
 267
 268         p_pic->i_status        = DESTROYED_PICTURE;
 269         p_pic->i_type          = DIRECT_PICTURE;
 270
 271         p_pic->i_left_margin   =
 272         p_pic->i_right_margin  =
 273         p_pic->i_top_margin    =
 274         p_pic->i_bottom_margin = 0;
 275
 276         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 277
 278         I_OUTPUTPICTURES++;
 279     }
 280
 281     return( 0 );
 282 }
 283
 284 /*****************************************************************************
 285  * vout_End: terminate Sys video thread output method
 286  *****************************************************************************
 287  * Terminate an output method created by vout_SDLCreate
 288  *****************************************************************************/
 289 static void vout_End( vout_thread_t *p_vout )
 290 {
 291     int i_index;
 292
 293     /* Free the output buffers we allocated */
 294     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 295     {
 296         i_index--;
 297         SDL_UnlockYUVOverlay( PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 298         SDL_FreeYUVOverlay( PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 299         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 300     }
 301 }
 302
 303 /*****************************************************************************
 304  * vout_Destroy: destroy Sys video thread output method
 305  *****************************************************************************
 306  * Terminate an output method created by vout_SDLCreate
 307  *****************************************************************************/
 308 static void vout_Destroy( vout_thread_t *p_vout )
 309 {
 310     SDLCloseDisplay( p_vout );
 311
 312     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 313
 314     free( p_vout->p_sys );
 315 }
 316
 317 /*****************************************************************************
 318  * vout_Manage: handle Sys events
 319  *****************************************************************************
 320  * This function should be called regularly by video output thread. It returns
 321  * a non null value if an error occured.
 322  *****************************************************************************/
 323 static int vout_Manage( vout_thread_t *p_vout )
 324 {
 325     SDL_Event event;                                            /* SDL event */
 326
 327     /* Process events */
 328     while( SDL_PollEvent(&event) )
 329     {
 330         switch( event.type )
 331         {
 332         case SDL_VIDEORESIZE:                          /* Resizing of window */
 333             p_vout->p_sys->i_width = event.resize.w;
 334             p_vout->p_sys->i_height = event.resize.h;
 335             SDLCloseDisplay( p_vout );
 336             SDLOpenDisplay( p_vout );
 337             break;
 338
 339         case SDL_MOUSEMOTION:
 340             if( p_vout->p_sys->b_cursor &&
 341                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 342             {
 343                 if( p_vout->p_sys->b_cursor_autohidden )
 344                 {
 345                     p_vout->p_sys->b_cursor_autohidden = 0;
 346                     SDL_ShowCursor( 1 );
 347                 }
 348                 else
 349                 {
 350                     p_vout->p_sys->i_lastmoved = mdate();
 351                 }
 352             }
 353             break;
 354
 355         case SDL_MOUSEBUTTONUP:
 356             switch( event.button.button )
 357             {
 358             case SDL_BUTTON_RIGHT:
 359                 p_main->p_intf->b_menu_change = 1;
 360                 break;
 361             }
 362             break;
 363
 364         case SDL_MOUSEBUTTONDOWN:
 365             switch( event.button.button )
 366             {
 367             case SDL_BUTTON_LEFT:
 368                 /* Handle clicks */
 369                 break;
 370             }
 371             break;
 372
 373         case SDL_QUIT:
 374             p_main->p_intf->b_die = 1;
 375             break;
 376
 377         case SDL_KEYDOWN:                             /* if a key is pressed */
 378
 379             switch( event.key.keysym.sym )
 380             {
 381             case SDLK_q:                                             /* quit */
 382             case SDLK_ESCAPE:
 383                 p_main->p_intf->b_die = 1;
 384                 break;
 385
 386             case SDLK_f:                             /* switch to fullscreen */
 387                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 388                 break;
 389
 390             case SDLK_c:                                 /* toggle grayscale */
 391                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 392                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 393                 break;
 394
 395             case SDLK_i:                                      /* toggle info */
 396                 p_vout->b_info = ! p_vout->b_info;
 397                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 398                 break;
 399
 400             case SDLK_s:                                   /* toggle scaling */
 401                 p_vout->b_scale = ! p_vout->b_scale;
 402                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 403                 break;
 404
 405             case SDLK_SPACE:                             /* toggle interface */
 406                 p_vout->b_interface = ! p_vout->b_interface;
 407                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 408                 break;
 409
 410             case SDLK_MENU:
 411                 p_main->p_intf->b_menu_change = 1;
 412                 break;
 413
 414             case SDLK_F10: network_ChannelJoin( 0 ); break;
 415             case SDLK_F1:  network_ChannelJoin( 1 ); break;
 416             case SDLK_F2:  network_ChannelJoin( 2 ); break;
 417             case SDLK_F3:  network_ChannelJoin( 3 ); break;
 418             case SDLK_F4:  network_ChannelJoin( 4 ); break;
 419             case SDLK_F5:  network_ChannelJoin( 5 ); break;
 420             case SDLK_F6:  network_ChannelJoin( 6 ); break;
 421             case SDLK_F7:  network_ChannelJoin( 7 ); break;
 422             case SDLK_F8:  network_ChannelJoin( 8 ); break;
 423             case SDLK_F9:  network_ChannelJoin( 9 ); break;
 424
 425             default:
 426                 intf_DbgMsg( "unhandled key %i", event.key.keysym.sym );
 427                 break;
 428             }
 429             break;
 430
 431         default:
 432             break;
 433         }
 434     }
 435
 436     /* Fullscreen change */
 437     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 438     {
 439         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 440
 441         SDL_WM_ToggleFullScreen(p_vout->p_sys->p_display);
 442
 443         p_vout->p_sys->b_cursor_autohidden = 0;
 444         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 445                         ! p_vout->p_sys->b_cursor_autohidden );
 446
 447         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 448     }
 449
 450     /* Pointer change */
 451     if( ! p_vout->p_sys->b_cursor_autohidden &&
 452         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 453     {
 454         /* Hide the mouse automatically */
 455         p_vout->p_sys->b_cursor_autohidden = 1;
 456         SDL_ShowCursor( 0 );
 457     }
 458
 459     return( 0 );
 460 }
 461
 462 /*****************************************************************************
 463  * vout_Display: displays previously rendered output
 464  *****************************************************************************
 465  * This function sends the currently rendered image to the display.
 466  *****************************************************************************/
 467 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 468 {
 469     int x, y, w, h;
 470     SDL_Rect disp;
 471
 472     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 473                        &x, &y, &w, &h );
 474     disp.x = x;
 475     disp.y = y;
 476     disp.w = w;
 477     disp.h = h;
 478
 479     SDL_UnlockYUVOverlay( p_pic->p_sys->p_overlay);
 480     SDL_DisplayYUVOverlay( p_pic->p_sys->p_overlay , &disp );
 481     SDL_LockYUVOverlay( p_pic->p_sys->p_overlay);
 482 }
 483
 484 /* following functions are local */
 485
 486 /*****************************************************************************
 487  * SDLOpenDisplay: open and initialize SDL device
 488  *****************************************************************************
 489  * Open and initialize display according to preferences specified in the vout
 490  * thread fields.
 491  *****************************************************************************/
 492 static int SDLOpenDisplay( vout_thread_t *p_vout )
 493 {
 494     Uint32 i_flags;
 495     int    i_bpp;
 496
 497     /* Initialize flags and cursor */
 498     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE;
 499     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 500
 501     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 502                              SDL_DEFAULT_BPP, i_flags );
 503     if( i_bpp == 0 )
 504     {
 505         intf_ErrMsg( "vout error: no video mode available" );
 506         return( 1 );
 507     }
 508
 509     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 510                                                  p_vout->p_sys->i_height,
 511                                                  i_bpp, i_flags );
 512
 513     if( p_vout->p_sys->p_display == NULL )
 514     {
 515         intf_ErrMsg( "vout error: cannot set video mode" );
 516         return( 1 );
 517     }
 518
 519     SDL_LockSurface( p_vout->p_sys->p_display );
 520
 521     p_vout->p_sys->p_overlay =
 522         SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 523                               p_vout->p_sys->p_display );
 524
 525     if( p_vout->p_sys->p_overlay == NULL )
 526     {
 527         intf_ErrMsg( "vout error: cannot set overlay" );
 528         SDL_UnlockSurface( p_vout->p_sys->p_display );
 529         SDL_FreeSurface( p_vout->p_sys->p_display );
 530         return( 1 );
 531     }
 532
 533     if( p_vout->p_sys->p_overlay->hw_overlay )
 534     {
 535         SDL_WM_SetCaption( VOUT_TITLE " (hardware SDL output)",
 536                            VOUT_TITLE " (hardware SDL output)" );
 537     }
 538     else
 539     {
 540         SDL_WM_SetCaption( VOUT_TITLE " (software SDL output)",
 541                            VOUT_TITLE " (software SDL output)" );
 542     }
 543
 544     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 545
 546     return( 0 );
 547 }
 548
 549 /*****************************************************************************
 550  * SDLCloseDisplay: close and reset SDL device
 551  *****************************************************************************
 552  * This function returns all resources allocated by SDLOpenDisplay and restore
 553  * the original state of the device.
 554  *****************************************************************************/
 555 static void SDLCloseDisplay( vout_thread_t *p_vout )
 556 {
 557     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 558     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 559     SDL_FreeSurface( p_vout->p_sys->p_display );
 560 }
 561
 562 /*****************************************************************************
 563  * SDLNewPicture: allocate a picture
 564  *****************************************************************************
 565  * Returns 0 on success, -1 otherwise
 566  *****************************************************************************/
 567 static int SDLNewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 568 {
 569     int i_width  = p_vout->output.i_width;
 570     int i_height = p_vout->output.i_height;
 571
 572     switch( p_vout->output.i_chroma )
 573     {
 574         case YUV_420_PICTURE:
 575             /* We know this chroma, allocate a buffer which will be used
 576              * directly by the decoder */
 577             p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 578
 579             if( p_pic->p_sys == NULL )
 580             {
 581                 return -1;
 582             }
 583
 584             p_pic->p_sys->p_overlay =
 585                 SDL_CreateYUVOverlay( i_width, i_height,
 586                                       SDL_YV12_OVERLAY,
 587                                       p_vout->p_sys->p_display );
 588
 589             if( p_pic->p_sys->p_overlay == NULL )
 590             {
 591                 free( p_pic->p_sys );
 592                 return -1;
 593             }
 594
 595             SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 596
 597             /* Precalculate some values */
 598             p_pic->i_size         = i_width * i_height;
 599             p_pic->i_chroma_width = i_width / 2;
 600             p_pic->i_chroma_size  = i_height * ( i_width / 2 );
 601
 602             /* FIXME: try to get the right i_bytes value from p_overlay */
 603             p_pic->planes[ Y_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 0 ];
 604             p_pic->planes[ Y_PLANE ].i_bytes = p_pic->i_size * sizeof( u8 );
 605             p_pic->planes[ Y_PLANE ].i_line_bytes = i_width * sizeof( u8 );
 606
 607             p_pic->planes[ U_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 2 ];
 608             p_pic->planes[ U_PLANE ].i_bytes = p_pic->i_size * sizeof( u8 ) / 4;
 609             p_pic->planes[ U_PLANE ].i_line_bytes = p_pic->i_chroma_width * sizeof( u8 );
 610
 611             p_pic->planes[ V_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 1 ];
 612             p_pic->planes[ V_PLANE ].i_bytes = p_pic->i_size * sizeof( u8 ) / 4;
 613             p_pic->planes[ V_PLANE ].i_line_bytes = p_pic->i_chroma_width * sizeof( u8 );
 614
 615             p_pic->i_planes = 3;
 616
 617             return 0;
 618
 619         default:
 620             /* Unknown chroma, tell the guy to get lost */
 621             p_pic->i_planes = 0;
 622
 623             return 0;
 624     }
 625 }
 626