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 1.75 2002/01/02 14:37:42 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 FOURCC_I420:
 231         case FOURCC_IYUV:
 232         case FOURCC_YV12:
 233             p_vout->output.i_chroma = p_vout->render.i_chroma;
 234             p_vout->output.i_width  = p_vout->render.i_width;
 235             p_vout->output.i_height = p_vout->render.i_height;
 236             p_vout->output.i_aspect = p_vout->render.i_aspect;
 237             break;
 238
 239         default:
 240             /* All we have is a 16bpp image with square pixels */
 241             /* FIXME: and if screen depth != 16 ?! */
 242             p_vout->output.i_chroma = FOURCC_BI_BITFIELDS | DEPTH_16BPP;
 243             p_vout->output.i_width = p_vout->p_sys->i_width;
 244             p_vout->output.i_height = p_vout->p_sys->i_height;
 245             p_vout->output.i_aspect = p_vout->p_sys->i_width
 246                              * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 247             break;
 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 || SDLNewPicture( 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         p_pic->i_left_margin   =
 275         p_pic->i_right_margin  =
 276         p_pic->i_top_margin    =
 277         p_pic->i_bottom_margin = 0;
 278
 279         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 280
 281         I_OUTPUTPICTURES++;
 282     }
 283
 284     return( 0 );
 285 }
 286
 287 /*****************************************************************************
 288  * vout_End: terminate Sys video thread output method
 289  *****************************************************************************
 290  * Terminate an output method created by vout_SDLCreate
 291  *****************************************************************************/
 292 static void vout_End( vout_thread_t *p_vout )
 293 {
 294     int i_index;
 295
 296     /* Free the output buffers we allocated */
 297     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 298     {
 299         i_index--;
 300         switch( p_vout->output.i_chroma )
 301         {
 302             case FOURCC_I420:
 303             case FOURCC_IYUV:
 304             case FOURCC_YV12:
 305                 SDL_UnlockYUVOverlay(
 306                         PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 307                 SDL_FreeYUVOverlay(
 308                         PP_OUTPUTPICTURE[ i_index ]->p_sys->p_overlay );
 309                 break;
 310
 311             default:
 312                 /* RGB picture */
 313                 break;
 314         }
 315         free( PP_OUTPUTPICTURE[ i_index ]->p_sys );
 316     }
 317 }
 318
 319 /*****************************************************************************
 320  * vout_Destroy: destroy Sys video thread output method
 321  *****************************************************************************
 322  * Terminate an output method created by vout_SDLCreate
 323  *****************************************************************************/
 324 static void vout_Destroy( vout_thread_t *p_vout )
 325 {
 326     SDLCloseDisplay( p_vout );
 327
 328     SDL_QuitSubSystem( SDL_INIT_VIDEO );
 329
 330     free( p_vout->p_sys );
 331 }
 332
 333 static __inline__ void vout_Seek( off_t i_seek )
 334 {
 335 #define area p_main->p_intf->p_input->stream.p_selected_area
 336     off_t i_tell = area->i_tell;
 337
 338     i_tell += i_seek * (off_t)50 * p_main->p_intf->p_input->stream.i_mux_rate;
 339
 340     i_tell = ( i_tell <= area->i_start ) ? area->i_start
 341            : ( i_tell >= area->i_size ) ? area->i_size
 342            : i_tell;
 343
 344     input_Seek( p_main->p_intf->p_input, i_tell );
 345 #undef area
 346 }
 347
 348 /*****************************************************************************
 349  * vout_Manage: handle Sys events
 350  *****************************************************************************
 351  * This function should be called regularly by video output thread. It returns
 352  * a non null value if an error occured.
 353  *****************************************************************************/
 354 static int vout_Manage( vout_thread_t *p_vout )
 355 {
 356     SDL_Event event;                                            /* SDL event */
 357
 358     /* Process events */
 359     while( SDL_PollEvent(&event) )
 360     {
 361         switch( event.type )
 362         {
 363         case SDL_VIDEORESIZE:                          /* Resizing of window */
 364             p_vout->p_sys->i_width = event.resize.w;
 365             p_vout->p_sys->i_height = event.resize.h;
 366             SDLCloseDisplay( p_vout );
 367             SDLOpenDisplay( p_vout );
 368             break;
 369
 370         case SDL_MOUSEMOTION:
 371             if( p_vout->p_sys->b_cursor &&
 372                 (abs(event.motion.xrel) > 2 || abs(event.motion.yrel) > 2) )
 373             {
 374                 if( p_vout->p_sys->b_cursor_autohidden )
 375                 {
 376                     p_vout->p_sys->b_cursor_autohidden = 0;
 377                     SDL_ShowCursor( 1 );
 378                 }
 379                 else
 380                 {
 381                     p_vout->p_sys->i_lastmoved = mdate();
 382                 }
 383             }
 384             break;
 385
 386         case SDL_MOUSEBUTTONUP:
 387             switch( event.button.button )
 388             {
 389             case SDL_BUTTON_RIGHT:
 390                 p_main->p_intf->b_menu_change = 1;
 391                 break;
 392             }
 393             break;
 394
 395         case SDL_MOUSEBUTTONDOWN:
 396             switch( event.button.button )
 397             {
 398             case SDL_BUTTON_LEFT:
 399                 /* In this part we will eventually manage
 400                  * clicks for DVD navigation for instance. For the
 401                  * moment just pause the stream. */
 402                 input_SetStatus( p_main->p_intf->p_input, INPUT_STATUS_PAUSE );
 403                 break;
 404
 405             case 4:
 406                 vout_Seek( 15 );
 407                 break;
 408
 409             case 5:
 410                 vout_Seek( -15 );
 411                 break;
 412             }
 413             break;
 414
 415         case SDL_QUIT:
 416             p_main->p_intf->b_die = 1;
 417             break;
 418
 419         case SDL_KEYDOWN:                             /* if a key is pressed */
 420
 421             switch( event.key.keysym.sym )
 422             {
 423             case SDLK_q:                                             /* quit */
 424             case SDLK_ESCAPE:
 425                 p_main->p_intf->b_die = 1;
 426                 break;
 427
 428             case SDLK_f:                             /* switch to fullscreen */
 429                 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 430                 break;
 431
 432             case SDLK_c:                                 /* toggle grayscale */
 433                 p_vout->b_grayscale = ! p_vout->b_grayscale;
 434                 p_vout->i_changes |= VOUT_GRAYSCALE_CHANGE;
 435                 break;
 436
 437             case SDLK_i:                                      /* toggle info */
 438                 p_vout->b_info = ! p_vout->b_info;
 439                 p_vout->i_changes |= VOUT_INFO_CHANGE;
 440                 break;
 441
 442             case SDLK_s:                                   /* toggle scaling */
 443                 p_vout->b_scale = ! p_vout->b_scale;
 444                 p_vout->i_changes |= VOUT_SCALE_CHANGE;
 445                 break;
 446
 447             case SDLK_SPACE:                             /* toggle interface */
 448                 p_vout->b_interface = ! p_vout->b_interface;
 449                 p_vout->i_changes |= VOUT_INTF_CHANGE;
 450                 break;
 451
 452             case SDLK_MENU:
 453                 p_main->p_intf->b_menu_change = 1;
 454                 break;
 455
 456             case SDLK_LEFT:
 457                 vout_Seek( -5 );
 458                 break;
 459
 460             case SDLK_RIGHT:
 461                 vout_Seek( 5 );
 462                 break;
 463
 464             case SDLK_UP:
 465                 vout_Seek( 60 );
 466                 break;
 467
 468             case SDLK_DOWN:
 469                 vout_Seek( -60 );
 470                 break;
 471
 472             case SDLK_F10: network_ChannelJoin( 0 ); break;
 473             case SDLK_F1:  network_ChannelJoin( 1 ); break;
 474             case SDLK_F2:  network_ChannelJoin( 2 ); break;
 475             case SDLK_F3:  network_ChannelJoin( 3 ); break;
 476             case SDLK_F4:  network_ChannelJoin( 4 ); break;
 477             case SDLK_F5:  network_ChannelJoin( 5 ); break;
 478             case SDLK_F6:  network_ChannelJoin( 6 ); break;
 479             case SDLK_F7:  network_ChannelJoin( 7 ); break;
 480             case SDLK_F8:  network_ChannelJoin( 8 ); break;
 481             case SDLK_F9:  network_ChannelJoin( 9 ); break;
 482
 483             default:
 484                 intf_DbgMsg( "unhandled key %i", event.key.keysym.sym );
 485                 break;
 486             }
 487             break;
 488
 489         default:
 490             break;
 491         }
 492     }
 493
 494     /* Fullscreen change */
 495     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 496     {
 497         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 498
 499         SDL_WM_ToggleFullScreen(p_vout->p_sys->p_display);
 500
 501         p_vout->p_sys->b_cursor_autohidden = 0;
 502         SDL_ShowCursor( p_vout->p_sys->b_cursor &&
 503                         ! p_vout->p_sys->b_cursor_autohidden );
 504
 505         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 506     }
 507
 508     /* Pointer change */
 509     if( ! p_vout->p_sys->b_cursor_autohidden &&
 510         ( mdate() - p_vout->p_sys->i_lastmoved > 2000000 ) )
 511     {
 512         /* Hide the mouse automatically */
 513         p_vout->p_sys->b_cursor_autohidden = 1;
 514         SDL_ShowCursor( 0 );
 515     }
 516
 517     return( 0 );
 518 }
 519
 520 /*****************************************************************************
 521  * vout_Display: displays previously rendered output
 522  *****************************************************************************
 523  * This function sends the currently rendered image to the display.
 524  *****************************************************************************/
 525 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 526 {
 527     int x, y, w, h;
 528     SDL_Rect disp;
 529
 530     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 531                        &x, &y, &w, &h );
 532     disp.x = x;
 533     disp.y = y;
 534     disp.w = w;
 535     disp.h = h;
 536
 537     switch( p_vout->output.i_chroma )
 538     {
 539         case FOURCC_I420:
 540         case FOURCC_IYUV:
 541         case FOURCC_YV12:
 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             /* RGB picture */
 549             SDL_Flip(p_vout->p_sys->p_display);
 550             break;
 551     }
 552 }
 553
 554 /* following functions are local */
 555
 556 /*****************************************************************************
 557  * SDLOpenDisplay: open and initialize SDL device
 558  *****************************************************************************
 559  * Open and initialize display according to preferences specified in the vout
 560  * thread fields.
 561  *****************************************************************************/
 562 static int SDLOpenDisplay( vout_thread_t *p_vout )
 563 {
 564     Uint32 i_flags;
 565     int    i_bpp;
 566
 567     /* Initialize flags and cursor */
 568     i_flags = SDL_ANYFORMAT | SDL_HWPALETTE | SDL_HWSURFACE | SDL_DOUBLEBUF;
 569     i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;
 570
 571     i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 572                              SDL_DEFAULT_BPP, i_flags );
 573     if( i_bpp == 0 )
 574     {
 575         intf_ErrMsg( "vout error: no video mode available" );
 576         return( 1 );
 577     }
 578
 579     p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
 580                                                  p_vout->p_sys->i_height,
 581                                                  i_bpp, i_flags );
 582
 583     if( p_vout->p_sys->p_display == NULL )
 584     {
 585         intf_ErrMsg( "vout error: cannot set video mode" );
 586         return( 1 );
 587     }
 588
 589     SDL_LockSurface( p_vout->p_sys->p_display );
 590
 591     p_vout->p_sys->p_overlay =
 592         SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
 593                               p_vout->p_sys->p_display );
 594
 595     if( p_vout->p_sys->p_overlay == NULL )
 596     {
 597         intf_ErrMsg( "vout error: cannot set overlay" );
 598         SDL_UnlockSurface( p_vout->p_sys->p_display );
 599         SDL_FreeSurface( p_vout->p_sys->p_display );
 600         return( 1 );
 601     }
 602
 603     if( p_vout->p_sys->p_overlay->hw_overlay )
 604     {
 605         SDL_WM_SetCaption( VOUT_TITLE " (hardware SDL output)",
 606                            VOUT_TITLE " (hardware SDL output)" );
 607     }
 608     else
 609     {
 610         SDL_WM_SetCaption( VOUT_TITLE " (software SDL output)",
 611                            VOUT_TITLE " (software SDL output)" );
 612     }
 613
 614     SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */
 615
 616     return( 0 );
 617 }
 618
 619 /*****************************************************************************
 620  * SDLCloseDisplay: close and reset SDL device
 621  *****************************************************************************
 622  * This function returns all resources allocated by SDLOpenDisplay and restore
 623  * the original state of the device.
 624  *****************************************************************************/
 625 static void SDLCloseDisplay( vout_thread_t *p_vout )
 626 {
 627     SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
 628     SDL_UnlockSurface ( p_vout->p_sys->p_display );
 629     SDL_FreeSurface( p_vout->p_sys->p_display );
 630 }
 631
 632 /*****************************************************************************
 633  * SDLNewPicture: allocate a picture
 634  *****************************************************************************
 635  * Returns 0 on success, -1 otherwise
 636  *****************************************************************************/
 637 static int SDLNewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 638 {
 639 #define P p_pic->planes
 640     int i_width  = p_vout->output.i_width;
 641     int i_height = p_vout->output.i_height;
 642
 643     switch( p_vout->output.i_chroma )
 644     {
 645         case FOURCC_I420:
 646         case FOURCC_IYUV:
 647         case FOURCC_YV12:
 648             p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 649
 650             if( p_pic->p_sys == NULL )
 651             {
 652                 return -1;
 653             }
 654
 655             p_pic->p_sys->p_overlay =
 656                 SDL_CreateYUVOverlay( i_width, i_height,
 657                                       SDL_YV12_OVERLAY,
 658                                       p_vout->p_sys->p_display );
 659
 660             if( p_pic->p_sys->p_overlay == NULL )
 661             {
 662                 free( p_pic->p_sys );
 663                 return -1;
 664             }
 665
 666             SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );
 667
 668             /* FIXME: try to get the right i_bytes value from p_overlay */
 669             P[ Y_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 0 ];
 670             P[ Y_PLANE ].i_bytes = i_width * i_height;
 671             P[ Y_PLANE ].i_line_bytes = i_width;
 672
 673             P[ U_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 2 ];
 674             P[ U_PLANE ].i_bytes = i_width * i_height / 4;
 675             P[ U_PLANE ].i_line_bytes = i_width / 2;
 676
 677             P[ V_PLANE ].p_data = p_pic->p_sys->p_overlay->pixels[ 1 ];
 678             P[ V_PLANE ].i_bytes = i_width * i_height / 4;
 679             P[ V_PLANE ].i_line_bytes = i_width / 2;
 680
 681             p_pic->i_planes = 3;
 682
 683             return 0;
 684
 685         case FOURCC_BI_BITFIELDS | DEPTH_16BPP:
 686             if( p_vout->p_sys->i_surfaces )
 687             {
 688                 /* We already allocated this surface, return */
 689                 return -1;
 690             }
 691
 692             p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 693
 694             if( p_pic->p_sys == NULL )
 695             {
 696                 return -1;
 697             }
 698
 699             P[ MAIN_PLANE ].p_data = p_vout->p_sys->p_display->pixels;
 700             P[ MAIN_PLANE ].i_bytes = 2 * i_width * i_height;
 701             P[ MAIN_PLANE ].i_line_bytes = 2 * i_width;
 702
 703             p_vout->p_sys->i_surfaces++;
 704
 705             p_pic->i_planes = 1;
 706
 707             return 0;
 708
 709         default:
 710             /* Unknown chroma, tell the guy to get lost */
 711             p_pic->i_planes = 0;
 712
 713             return -1;
 714     }
 715 #undef P
 716 }
 717