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 1.74 2001/12/30 07:09:56 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 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <errno.h>                                                 /* ENOMEM */
  30 #include <stdlib.h>                                                /* free() */
  31 #include <string.h>                                            /* strerror() */
  32
  33 #include <videolan/vlc.h>
  34
  35 #include <sys/types.h>
  36 #ifndef WIN32
  37 #   include <netinet/in.h>                            /* BSD: struct in_addr */
  38 #endif
  39
  40 #include SDL_INCLUDE_FILE
  41
  42 #include "netutils.h"
  43
  44 #include "video.h"
  45 #include "video_output.h"
  46
  47 #include "interface.h"
  48
  49 #include "stream_control.h"                 /* needed by input_ext-intf.h... */
  50 #include "input_ext-intf.h"
  51
  52 #define SDL_MAX_DIRECTBUFFERS 5
  53 #define SDL_DEFAULT_BPP 16
  54
  55 /*****************************************************************************
  56  * vout_sys_t: video output SDL method descriptor
  57  *****************************************************************************
  58  * This structure is part of the video output thread descriptor.
  59  * It describes the SDL specific properties of an output thread.
  60  *****************************************************************************/
  61 typedef struct vout_sys_s
  62 {
  63     SDL_Surface *   p_display;                             /* display device */
  64     SDL_Overlay *   p_overlay; /* An overlay we keep to grab the XVideo port */
  65
  66     int i_width;
  67     int i_height;
  68
  69     int i_surfaces;
  70
  71     boolean_t   b_cursor;
  72     boolean_t   b_cursor_autohidden;
  73     mtime_t     i_lastmoved;
  74
  75 } vout_sys_t;
  76
  77 /*****************************************************************************
  78  * picture_sys_t: direct buffer method descriptor
  79  *****************************************************************************
  80  * This structure is part of the picture descriptor, it describes the
  81  * SDL specific properties of a direct buffer.
  82  *****************************************************************************/
  83 typedef struct picture_sys_s
  84 {
  85     SDL_Overlay *p_overlay;
  86
  87 } picture_sys_t;
  88
  89 /*****************************************************************************
  90  * Local prototypes.
  91  *****************************************************************************/
  92 static int  vout_Probe      ( probedata_t *p_data );
  93 static int  vout_Create     ( struct vout_thread_s * );
  94 static int  vout_Init       ( struct vout_thread_s * );
  95 static void vout_End        ( struct vout_thread_s * );
  96 static void vout_Destroy    ( struct vout_thread_s * );
  97 static int  vout_Manage     ( struct vout_thread_s * );
  98 static void vout_Display    ( struct vout_thread_s *, struct picture_s * );
  99
 100 static int  SDLOpenDisplay      ( vout_thread_t *p_vout );
 101 static void SDLCloseDisplay     ( vout_thread_t *p_vout );
 102 static int  SDLNewPicture       ( vout_thread_t *p_vout, picture_t *p_pic );
 103
 104 /*****************************************************************************
 105  * Functions exported as capabilities. They are declared as static so that
 106  * we don't pollute the namespace too much.
 107  *****************************************************************************/
 108 void _M( vout_getfunctions )( function_list_t * p_function_list )
 109 {
 110     p_function_list->pf_probe = vout_Probe;
 111     p_function_list->functions.vout.pf_create     = vout_Create;
 112     p_function_list->functions.vout.pf_init       = vout_Init;
 113     p_function_list->functions.vout.pf_end        = vout_End;
 114     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 115     p_function_list->functions.vout.pf_manage     = vout_Manage;
 116     p_function_list->functions.vout.pf_display    = vout_Display;
 117     p_function_list->functions.vout.pf_setpalette = NULL;
 118 }
 119
 120 /*****************************************************************************
 121  * vout_Probe: probe the video driver and return a score
 122  *****************************************************************************
 123  * This function tries to initialize SDL and returns a score to the
 124  * plugin manager so that it can select the best plugin.
 125  *****************************************************************************/
 126 static int vout_Probe( probedata_t *p_data )
 127 {
 128     if( SDL_WasInit( SDL_INIT_VIDEO ) != 0 )
 129     {
 130         return( 0 );
 131     }
 132
 133     return( 100 );
 134 }
 135
 136 /*****************************************************************************
 137  * vout_Create: allocate SDL video thread output method
 138  *****************************************************************************
 139  * This function allocate and initialize a SDL vout method. It uses some of the
 140  * vout properties to choose the correct mode, and change them according to the
 141  * mode actually used.
 142  *****************************************************************************/
 143 static int vout_Create( vout_thread_t *p_vout )
 144 {
 145     /* Allocate structure */
 146     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 147     if( p_vout->p_sys == NULL )
 148     {
 149         intf_ErrMsg( "vout error: can't create p_sys (%s)", strerror(ENOMEM) );
 150         return( 1 );
 151     }
 152
 153     /* Initialize library */
 154     if( SDL_Init( SDL_INIT_VIDEO
 155 #ifndef WIN32
 156     /* Win32 SDL implementation doesn't support SDL_INIT_EVENTTHREAD yet*/
 157                 | SDL_INIT_EVENTTHREAD
 158 #endif
 159 #ifdef DEBUG
 160     /* In debug mode you may want vlc to dump a core instead of staying
 161      * stuck */
 162                 | SDL_INIT_NOPARACHUTE
 163 #endif
 164                 ) < 0 )
 165     {
 166         intf_ErrMsg( "vout error: can't initialize SDL (%s)", SDL_GetError() );
 167         free( p_vout->p_sys );
 168         return( 1 );
 169     }
 170
 171     p_vout->p_sys->b_cursor = 1; /* TODO should be done with a main_GetInt.. */
 172     p_vout->p_sys->b_cursor_autohidden = 0;
 173     p_vout->p_sys->i_lastmoved = mdate();
 174
 175     if( p_vout->render.i_height * p_vout->render.i_aspect
 176          >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
 177     {
 178         p_vout->p_sys->i_width = p_vout->render.i_height
 179             * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 180         p_vout->p_sys->i_height = p_vout->render.i_height;
 181     }
 182     else
 183     {
 184         p_vout->p_sys->i_width = p_vout->render.i_width;
 185         p_vout->p_sys->i_height = p_vout->render.i_width
 186             * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 187     }
 188
 189 #if 0
 190     if( p_vout->p_sys->i_width <= 300 && p_vout->p_sys->i_height <= 300 )
 191     {
 192         p_vout->p_sys->i_width <<= 1;
 193         p_vout->p_sys->i_height <<= 1;
 194     }
 195     else if( p_vout->p_sys->i_width <= 400 && p_vout->p_sys->i_height <= 400 )
 196     {
 197         p_vout->p_sys->i_width += p_vout->p_sys->i_width >> 1;
 198         p_vout->p_sys->i_height += p_vout->p_sys->i_height >> 1;
 199     }
 200 #endif
 201
 202     if( SDLOpenDisplay( p_vout ) )
 203     {
 204         intf_ErrMsg( "vout error: can't set up SDL (%s)", SDL_GetError() );
 205         SDL_QuitSubSystem( SDL_INIT_VIDEO );
 206         free( p_vout->p_sys );
 207         return( 1 );
 208     }
 209
 210     return( 0 );
 211 }
 212
 213 /*****************************************************************************
 214  * vout_Init: initialize SDL video thread output method
 215  *****************************************************************************
 216  * This function initialize the SDL display device.
 217  *****************************************************************************/
 218 static int vout_Init( vout_thread_t *p_vout )
 219 {
 220     int i_index;
 221     picture_t *p_pic;
 222
 223     p_vout->p_sys->i_surfaces = 0;
 224
 225     I_OUTPUTPICTURES = 0;
 226
 227     /* Initialize the output structure */
 228     switch( p_vout->render.i_chroma )
 229     {
 230         case YUV_420_PICTURE:
 231             p_vout->output.i_chroma = p_vout->render.i_chroma;
 232             p_vout->output.i_width  = p_vout->render.i_width;
 233             p_vout->output.i_height = p_vout->render.i_height;
 234             p_vout->output.i_aspect = p_vout->render.i_aspect;
 235             break;
 236
 237         default:
 238             /* All we have is a 16bpp image with square pixels */
 239             /* FIXME: and if screen depth != 16 ?! */
 240             p_vout->output.i_chroma = RGB_16BPP_PICTURE;
 241             p_vout->output.i_width = p_vout->p_sys->i_width;
 242             p_vout->output.i_height = p_vout->p_sys->i_height;
 243             p_vout->output.i_aspect = p_vout->p_sys->i_width
 244                              * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 245             break;
 246     }
 247
 248     /* Try to initialize SDL_MAX_DIRECTBUFFERS direct buffers */
 249     while( I_OUTPUTPICTURES < SDL_MAX_DIRECTBUFFERS )
 250     {
 251         p_pic = NULL;
 252
 253         /* Find an empty picture slot */
 254         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 255         {
 256             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 257             {
 258                 p_pic = p_vout->p_picture + i_index;
 259                 break;
 260             }
 261         }
 262
 263         /* Allocate the picture if we found one */
 264         if( p_pic == NULL || SDLNewPicture( p_vout, p_pic ) )
 265         {
 266             break;
 267         }
 268
 269         p_pic->i_status        = DESTROYED_PICTURE;
 270         p_pic->i_type          = DIRECT_PICTURE;
 271
 272         p_pic->i_left_margin   =
 273         p_pic->i_right_margin  =
 274         p_pic->i_top_margin    =
 275         p_pic->i_bottom_margin = 0;
 276
 277         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 278
 279         I_OUTPUTPICTURES++;
 280     }
 281
 282     return( 0 );
 283 }
 284
 285 /*****************************************************************************
 286  * vout_End: terminate Sys video thread output method
 287  *****************************************************************************
 288  * Terminate an output method created by vout_SDLCreate
 289  *****************************************************************************/
 290 static void vout_End( vout_thread_t *p_vout )
 291 {
 292     int i_index;
 293
 294     /* Free the output buffers we allocated */
 295     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 296     {
 297         i_index--;
 298         switch( p_vout->output.i_chroma )
 299         {
 300             case YUV_420_PICTURE:
 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                 break;
 306
 307             case RGB_16BPP_PICTURE:
 308                 break;
 309
 310             default:
 311                 break;
 312         }
 313         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 314     }
 315 }
 316
 317 /*****************************************************************************
 318  * vout_Destroy: destroy Sys video thread output method
 319  *****************************************************************************
 320  * Terminate an output method created by vout_SDLCreate
 321  *****************************************************************************/
 322 static void vout_Destroy( vout_thread_t *p_vout )
 323 {
 324     SDLCloseDisplay( p_vout );
 325
 326     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 327
 328     free( p_vout->p_sys );
 329 }
 330
 331 static __inline__ void vout_Seek( off_t i_seek )
 332 {
 333 #define area p_main->p_intf->p_input->stream.p_selected_area
 334     off_t i_tell = area->i_tell;
 335
 336     i_tell += i_seek * (off_t)50 * p_main->p_intf->p_input->stream.i_mux_rate;
 337
 338     i_tell = ( i_tell <= area->i_start ) ? area->i_start
 339            : ( i_tell >= area->i_size ) ? area->i_size
 340            : i_tell;
 341
 342     input_Seek( p_main->p_intf->p_input, i_tell );
 343 #undef area
 344 }
 345
 346 /*****************************************************************************
 347  * vout_Manage: handle Sys events
 348  *****************************************************************************
 349  * This function should be called regularly by video output thread. It returns
 350  * a non null value if an error occured.
 351  *****************************************************************************/
 352 static int vout_Manage( vout_thread_t *p_vout )
 353 {
 354     SDL_Event event;                                            /* SDL event */
 355
 356     /* Process events */
 357     while( SDL_PollEvent(&event) )
 358     {
 359         switch( event.type )
 360         {
 361         case SDL_VIDEORESIZE:                          /* Resizing of window */
 362             p_vout->p_sys->i_width = event.resize.w;
 363             p_vout->p_sys->i_height = event.resize.h;
 364             SDLCloseDisplay( p_vout );
 365             SDLOpenDisplay( p_vout );
 366             break;
 367
 368         case SDL_MOUSEMOTION:
 369             if( p_vout->p_sys->b_cursor &&
 370                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 371             {
 372                 if( p_vout->p_sys->b_cursor_autohidden )
 373                 {
 374                     p_vout->p_sys->b_cursor_autohidden = 0;
 375                     SDL_ShowCursor( 1 );
 376                 }
 377                 else
 378                 {
 379                     p_vout->p_sys->i_lastmoved = mdate();
 380                 }
 381             }
 382             break;
 383
 384         case SDL_MOUSEBUTTONUP:
 385             switch( event.button.button )
 386             {
 387             case SDL_BUTTON_RIGHT:
 388                 p_main->p_intf->b_menu_change = 1;
 389                 break;
 390             }
 391             break;
 392
 393         case SDL_MOUSEBUTTONDOWN:
 394             switch( event.button.button )
 395             {
 396             case SDL_BUTTON_LEFT:
 397                 /* In this part we will eventually manage
 398                  * clicks for DVD navigation for instance. For the
 399                  * moment just pause the stream. */
 400                 input_SetStatus( p_main->p_intf->p_input, INPUT_STATUS_PAUSE );
 401                 break;
 402
 403             case 4:
 404                 vout_Seek( 15 );
 405                 break;
 406
 407             case 5:
 408                 vout_Seek( -15 );
 409                 break;
 410             }
 411             break;
 412
 413         case SDL_QUIT:
 414             p_main->p_intf->b_die = 1;
 415             break;
 416
 417         case SDL_KEYDOWN:                             /* if a key is pressed */
 418
 419             switch( event.key.keysym.sym )
 420             {
 421             case SDLK_q:                                             /* quit */
 422             case SDLK_ESCAPE:
 423                 p_main->p_intf->b_die = 1;
 424                 break;
 425
 426             case SDLK_f:                             /* switch to fullscreen */
 427                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 428                 break;
 429
 430             case SDLK_c:                                 /* toggle grayscale */
 431                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 432                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 433                 break;
 434
 435             case SDLK_i:                                      /* toggle info */
 436                 p_vout->b_info = ! p_vout->b_info;
 437                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 438                 break;
 439
 440             case SDLK_s:                                   /* toggle scaling */
 441                 p_vout->b_scale = ! p_vout->b_scale;
 442                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 443                 break;
 444
 445             case SDLK_SPACE:                             /* toggle interface */
 446                 p_vout->b_interface = ! p_vout->b_interface;
 447                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 448                 break;
 449
 450             case SDLK_MENU:
 451                 p_main->p_intf->b_menu_change = 1;
 452                 break;
 453
 454             case SDLK_LEFT:
 455                 vout_Seek( -5 );
 456                 break;
 457
 458             case SDLK_RIGHT:
 459                 vout_Seek( 5 );
 460                 break;
 461
 462             case SDLK_UP:
 463                 vout_Seek( 60 );
 464                 break;
 465
 466             case SDLK_DOWN:
 467                 vout_Seek( -60 );
 468                 break;
 469
 470             case SDLK_F10: network_ChannelJoin( 0 ); break;
 471             case SDLK_F1:  network_ChannelJoin( 1 ); break;
 472             case SDLK_F2:  network_ChannelJoin( 2 ); break;
 473             case SDLK_F3:  network_ChannelJoin( 3 ); break;
 474             case SDLK_F4:  network_ChannelJoin( 4 ); break;
 475             case SDLK_F5:  network_ChannelJoin( 5 ); break;
 476             case SDLK_F6:  network_ChannelJoin( 6 ); break;
 477             case SDLK_F7:  network_ChannelJoin( 7 ); break;
 478             case SDLK_F8:  network_ChannelJoin( 8 ); break;
 479             case SDLK_F9:  network_ChannelJoin( 9 ); break;
 480
 481             default:
 482                 intf_DbgMsg( "unhandled key %i", event.key.keysym.sym );
 483                 break;
 484             }
 485             break;
 486
 487         default:
 488             break;
 489         }
 490     }
 491
 492     /* Fullscreen change */
 493     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 494     {
 495         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 496
 497         SDL_WM_ToggleFullScreen(p_vout->p_sys->p_display);
 498
 499         p_vout->p_sys->b_cursor_autohidden = 0;
 500         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 501                         ! p_vout->p_sys->b_cursor_autohidden );
 502
 503         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 504     }
 505
 506     /* Pointer change */
 507     if( ! p_vout->p_sys->b_cursor_autohidden &&
 508         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 509     {
 510         /* Hide the mouse automatically */
 511         p_vout->p_sys->b_cursor_autohidden = 1;
 512         SDL_ShowCursor( 0 );
 513     }
 514
 515     return( 0 );
 516 }
 517
 518 /*****************************************************************************
 519  * vout_Display: displays previously rendered output
 520  *****************************************************************************
 521  * This function sends the currently rendered image to the display.
 522  *****************************************************************************/
 523 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 524 {
 525     int x, y, w, h;
 526     SDL_Rect disp;
 527
 528     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 529                        &x, &y, &w, &h );
 530     disp.x = x;
 531     disp.y = y;
 532     disp.w = w;
 533     disp.h = h;
 534
 535     switch( p_vout->output.i_chroma )
 536     {
 537         case RGB_16BPP_PICTURE:
 538             SDL_Flip(p_vout->p_sys->p_display);
 539             break;
 540
 541         case YUV_420_PICTURE:
 542             SDL_UnlockYUVOverlay( p_pic->p_sys->p_overlay);
 543             SDL_DisplayYUVOverlay( p_pic->p_sys->p_overlay , &disp );
 544             SDL_LockYUVOverlay( p_pic->p_sys->p_overlay);
 545             break;
 546
 547         default:
 548             break;
 549     }
 550 }
 551
 552 /* following functions are local */
 553
 554 /*****************************************************************************
 555  * SDLOpenDisplay: open and initialize SDL device
 556  *****************************************************************************
 557  * Open and initialize display according to preferences specified in the vout
 558  * thread fields.
 559  *****************************************************************************/
 560 static int SDLOpenDisplay( vout_thread_t *p_vout )
 561 {
 562     Uint32 i_flags;
 563     int    i_bpp;
 564
 565     /* Initialize flags and cursor */
 566     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE | SDL_DOUBLEBUF;
 567     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 568
 569     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 570                              SDL_DEFAULT_BPP, i_flags );
 571     if( i_bpp == 0 )
 572     {
 573         intf_ErrMsg( "vout error: no video mode available" );
 574         return( 1 );
 575     }
 576
 577     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 578                                                  p_vout->p_sys->i_height,
 579                                                  i_bpp, i_flags );
 580
 581     if( p_vout->p_sys->p_display == NULL )
 582     {
 583         intf_ErrMsg( "vout error: cannot set video mode" );
 584         return( 1 );
 585     }
 586
 587     SDL_LockSurface( p_vout->p_sys->p_display );
 588
 589     p_vout->p_sys->p_overlay =
 590         SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 591                               p_vout->p_sys->p_display );
 592
 593     if( p_vout->p_sys->p_overlay == NULL )
 594     {
 595         intf_ErrMsg( "vout error: cannot set overlay" );
 596         SDL_UnlockSurface( p_vout->p_sys->p_display );
 597         SDL_FreeSurface( p_vout->p_sys->p_display );
 598         return( 1 );
 599     }
 600
 601     if( p_vout->p_sys->p_overlay->hw_overlay )
 602     {
 603         SDL_WM_SetCaption( VOUT_TITLE " (hardware SDL output)",
 604                            VOUT_TITLE " (hardware SDL output)" );
 605     }
 606     else
 607     {
 608         SDL_WM_SetCaption( VOUT_TITLE " (software SDL output)",
 609                            VOUT_TITLE " (software SDL output)" );
 610     }
 611
 612     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 613
 614     return( 0 );
 615 }
 616
 617 /*****************************************************************************
 618  * SDLCloseDisplay: close and reset SDL device
 619  *****************************************************************************
 620  * This function returns all resources allocated by SDLOpenDisplay and restore
 621  * the original state of the device.
 622  *****************************************************************************/
 623 static void SDLCloseDisplay( vout_thread_t *p_vout )
 624 {
 625     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 626     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 627     SDL_FreeSurface( p_vout->p_sys->p_display );
 628 }
 629
 630 /*****************************************************************************
 631  * SDLNewPicture: allocate a picture
 632  *****************************************************************************
 633  * Returns 0 on success, -1 otherwise
 634  *****************************************************************************/
 635 static int SDLNewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 636 {
 637 #define P p_pic->planes
 638     int i_width  = p_vout->output.i_width;
 639     int i_height = p_vout->output.i_height;
 640
 641     switch( p_vout->output.i_chroma )
 642     {
 643         case RGB_16BPP_PICTURE:
 644             if( p_vout->p_sys->i_surfaces )
 645             {
 646                 /* We already allocated this surface, return */
 647                 return -1;
 648             }
 649
 650             p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 651
 652             if( p_pic->p_sys == NULL )
 653             {
 654                 return -1;
 655             }
 656
 657             P[ RGB_PLANE ].p_data = p_vout->p_sys->p_display->pixels;
 658             P[ RGB_PLANE ].i_bytes = 2 * i_width * i_height;
 659             P[ RGB_PLANE ].i_line_bytes = 2 * i_width;
 660
 661             p_vout->p_sys->i_surfaces++;
 662
 663             p_pic->i_planes = 1;
 664
 665             return 0;
 666
 667         case YUV_420_PICTURE:
 668             p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 669
 670             if( p_pic->p_sys == NULL )
 671             {
 672                 return -1;
 673             }
 674
 675             p_pic->p_sys->p_overlay =
 676                 SDL_CreateYUVOverlay( i_width, i_height,
 677                                       SDL_YV12_OVERLAY,
 678                                       p_vout->p_sys->p_display );
 679
 680             if( p_pic->p_sys->p_overlay == NULL )
 681             {
 682                 free( p_pic->p_sys );
 683                 return -1;
 684             }
 685
 686             SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 687
 688             /* FIXME: try to get the right i_bytes value from p_overlay */
 689             P[ Y_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 0 ];
 690             P[ Y_PLANE ].i_bytes = i_width * i_height;
 691             P[ Y_PLANE ].i_line_bytes = i_width;
 692
 693             P[ U_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 2 ];
 694             P[ U_PLANE ].i_bytes = i_width * i_height / 4;
 695             P[ U_PLANE ].i_line_bytes = i_width / 2;
 696
 697             P[ V_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 1 ];
 698             P[ V_PLANE ].i_bytes = i_width * i_height / 4;
 699             P[ V_PLANE ].i_line_bytes = i_width / 2;
 700
 701             p_pic->i_planes = 3;
 702
 703             return 0;
 704
 705         default:
 706             /* Unknown chroma, tell the guy to get lost */
 707             p_pic->i_planes = 0;
 708
 709             return -1;
 710     }
 711 #undef P
 712 }
 713