git.sesse.net Git - vlc/blob - plugins/x11/vout_xvideo.c

   1 /*****************************************************************************
   2  * vout_xvideo.c: Xvideo video output display method
   3  *****************************************************************************
   4  * Copyright (C) 1998, 1999, 2000, 2001 VideoLAN
   5  * $Id: vout_xvideo.c,v 1.17 2001/05/25 13:20:09 sam Exp $
   6  *
   7  * Authors: Shane Harper <shanegh@optusnet.com.au>
   8  *          Vincent Seguin <seguin@via.ecp.fr>
   9  *          Samuel Hocevar <sam@zoy.org>
  10  *          David Kennedy <dkennedy@tinytoad.com>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 #define MODULE_NAME xvideo
  28 #include "modules_inner.h"
  29
  30 /*****************************************************************************
  31  * Preamble
  32  *****************************************************************************/
  33 #include "defs.h"
  34
  35 #include <errno.h>                                                 /* ENOMEM */
  36 #include <stdlib.h>                                                /* free() */
  37 #include <string.h>                                            /* strerror() */
  38
  39 #ifdef HAVE_MACHINE_PARAM_H
  40 /* BSD */
  41 #include <machine/param.h>
  42 #include <sys/types.h>                                     /* typedef ushort */
  43 #include <sys/ipc.h>
  44 #endif
  45
  46 #ifndef WIN32
  47 #include <netinet/in.h>                               /* BSD: struct in_addr */
  48 #endif
  49
  50 #include <sys/shm.h>                                   /* shmget(), shmctl() */
  51 #include <X11/Xlib.h>
  52 #include <X11/Xutil.h>
  53 #include <X11/keysym.h>
  54 #include <X11/extensions/XShm.h>
  55 #include <X11/extensions/Xv.h>
  56 #include <X11/extensions/Xvlib.h>
  57
  58 #include "config.h"
  59 #include "common.h"
  60 #include "threads.h"
  61 #include "mtime.h"
  62 #include "tests.h"
  63 #include "modules.h"
  64
  65 #include "video.h"
  66 #include "video_output.h"
  67
  68 #include "interface.h"
  69 #include "intf_msg.h"
  70
  71 #include "netutils.h"                                 /* network_ChannelJoin */
  72
  73 #include "main.h"
  74
  75 #include "stream_control.h"                 /* needed by input_ext-intf.h... */
  76 #include "input_ext-intf.h"
  77
  78
  79 #define GUID_YUV12_PLANAR 0x32315659
  80
  81
  82 /*****************************************************************************
  83  * vout_sys_t: video output X11 method descriptor
  84  *****************************************************************************
  85  * This structure is part of the video output thread descriptor.
  86  * It describes the XVideo specific properties of an output thread.
  87  *****************************************************************************/
  88 typedef struct vout_sys_s
  89 {
  90     /* User settings */
  91 #if 0
  92     /* this plugin (currently) requires the SHM Ext... */
  93     boolean_t           b_shm;               /* shared memory extension flag */
  94 #endif
  95
  96     /* Internal settings and properties */
  97     Display *           p_display;                        /* display pointer */
  98     int                 i_screen;                           /* screen number */
  99     Window              window;                               /* root window */
 100     GC                  gc;              /* graphic context instance handler */
 101     Window              yuv_window;   /* sub-window for displaying yuv video
 102                                                                         data */
 103     GC                  yuv_gc;
 104     int                 xv_port;
 105
 106     /* Display buffers and shared memory information */
 107     /* Note: only 1 buffer... Xv ext does double buffering. */
 108     XvImage *           p_xvimage;
 109     int                 i_image_width;
 110     int                 i_image_height;
 111                                 /* i_image_width & i_image_height reflect the
 112                                  * size of the XvImage. They are used by
 113                                  * vout_Display() to check if the image to be
 114                                  * displayed can use the current XvImage. */
 115     XShmSegmentInfo     shm_info;       /* shared memory zone information */
 116
 117     /* X11 generic properties */
 118     Atom                wm_protocols;
 119     Atom                wm_delete_window;
 120
 121     int                 i_window_width;              /* width of main window */
 122     int                 i_window_height;            /* height of main window */
 123
 124
 125     /* Screen saver properties */
 126     int                 i_ss_timeout;                             /* timeout */
 127     int                 i_ss_interval;           /* interval between changes */
 128     int                 i_ss_blanking;                      /* blanking mode */
 129     int                 i_ss_exposure;                      /* exposure mode */
 130
 131     /* Mouse pointer properties */
 132     boolean_t           b_mouse_pointer_visible;
 133     mtime_t             i_time_mouse_last_moved; /* used to auto-hide pointer*/
 134
 135 } vout_sys_t;
 136
 137 /* Fullscreen needs to be able to hide the wm decorations */
 138 #define MWM_HINTS_DECORATIONS   (1L << 1)
 139 #define PROP_MWM_HINTS_ELEMENTS 5
 140 typedef struct mwmhints_s
 141 {
 142     u32 flags;
 143     u32 functions;
 144     u32 decorations;
 145     s32 input_mode;
 146     u32 status;
 147 } mwmhints_t;
 148
 149 /*****************************************************************************
 150  * Local prototypes
 151  *****************************************************************************/
 152 static int  vout_Probe     ( probedata_t * );
 153 static int  vout_Create    ( vout_thread_t * );
 154 static int  vout_Init      ( vout_thread_t * );
 155 static void vout_End       ( vout_thread_t * );
 156 static void vout_Destroy   ( vout_thread_t * );
 157 static int  vout_Manage    ( vout_thread_t * );
 158 static void vout_Display   ( vout_thread_t * );
 159 static void vout_SetPalette( vout_thread_t *, u16 *, u16 *, u16 *, u16 * );
 160
 161 static int  XVideoCreateWindow       ( vout_thread_t * );
 162 static void XVideoDestroyWindow      ( vout_thread_t *p_vout );
 163 static int  XVideoUpdateImgSizeIfRequired( vout_thread_t *p_vout );
 164 static int  XVideoCreateShmImage     ( Display* dpy, int xv_port,
 165                                        XvImage **pp_xvimage,
 166                                        XShmSegmentInfo *p_shm_info,
 167                                        int i_width, int i_height );
 168 static void XVideoDestroyShmImage    ( vout_thread_t *, XvImage *,
 169                                        XShmSegmentInfo * );
 170 static void XVideoSetMousePointer    ( const vout_thread_t * );
 171 static void XVideoEnableScreenSaver  ( vout_thread_t * );
 172 static void XVideoDisableScreenSaver ( vout_thread_t * );
 173 /*static void XVideoSetAttribute       ( vout_thread_t *, char *, float );*/
 174
 175 static int  XVideoCheckForXv         ( Display * );
 176 static int  XVideoGetPort            ( Display * );
 177 static void XVideoOutputCoords       ( const picture_t *, const boolean_t,
 178                                        const int, const int,
 179                                        int *, int *, int *, int * );
 180 static void XVideoDisplay            ( vout_thread_t * );
 181
 182 /*****************************************************************************
 183  * Functions exported as capabilities. They are declared as static so that
 184  * we don't pollute the namespace too much.
 185  *****************************************************************************/
 186 void _M( vout_getfunctions )( function_list_t * p_function_list )
 187 {
 188     p_function_list->pf_probe = vout_Probe;
 189     p_function_list->functions.vout.pf_create     = vout_Create;
 190     p_function_list->functions.vout.pf_init       = vout_Init;
 191     p_function_list->functions.vout.pf_end        = vout_End;
 192     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 193     p_function_list->functions.vout.pf_manage     = vout_Manage;
 194     p_function_list->functions.vout.pf_display    = vout_Display;
 195     p_function_list->functions.vout.pf_setpalette = vout_SetPalette;
 196 }
 197
 198 /*****************************************************************************
 199  * vout_Probe: probe the video driver and return a score
 200  *****************************************************************************
 201  * This returns a score to the plugin manager so that it can select the best
 202  * plugin.
 203  *****************************************************************************/
 204 static int vout_Probe( probedata_t *p_data )
 205 {
 206     if( TestMethod( VOUT_METHOD_VAR, "xvideo" ) )
 207     {
 208         return( 999 );
 209     }
 210
 211     return( 60 );
 212 }
 213
 214 /*****************************************************************************
 215  * vout_Create: allocate XVideo video thread output method
 216  *****************************************************************************
 217  * This function allocate and initialize a XVideo vout method. It uses some of
 218  * the vout properties to choose the window size, and change them according to
 219  * the actual properties of the display.
 220  *****************************************************************************/
 221 static int vout_Create( vout_thread_t *p_vout )
 222 {
 223     char *psz_display;
 224
 225     /* Allocate structure */
 226     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 227     if( p_vout->p_sys == NULL )
 228     {
 229         intf_ErrMsg( "vout error: %s", strerror(ENOMEM) );
 230         return( 1 );
 231     }
 232
 233     /* Open display, unsing 'vlc_display' or DISPLAY environment variable */
 234     psz_display = XDisplayName( main_GetPszVariable( VOUT_DISPLAY_VAR, NULL ) );
 235     p_vout->p_sys->p_display = XOpenDisplay( psz_display );
 236
 237     if( p_vout->p_sys->p_display == NULL )                          /* error */
 238     {
 239         intf_ErrMsg( "vout error: cannot open display %s", psz_display );
 240         free( p_vout->p_sys );
 241         return( 1 );
 242     }
 243     p_vout->p_sys->i_screen = DefaultScreen( p_vout->p_sys->p_display );
 244
 245     p_vout->b_fullscreen
 246         = main_GetIntVariable( VOUT_FULLSCREEN_VAR, VOUT_FULLSCREEN_DEFAULT );
 247
 248     if( !XVideoCheckForXv( p_vout->p_sys->p_display ) )
 249     {
 250         intf_ErrMsg( "vout error: no XVideo extension" );
 251         XCloseDisplay( p_vout->p_sys->p_display );
 252         free( p_vout->p_sys );
 253         return( 1 );
 254     }
 255
 256     /* Spawn base window - this window will include the video output window,
 257      * but also command buttons, subtitles and other indicators */
 258     if( XVideoCreateWindow( p_vout ) )
 259     {
 260         intf_ErrMsg( "vout error: cannot create XVideo window" );
 261         XCloseDisplay( p_vout->p_sys->p_display );
 262         free( p_vout->p_sys );
 263         return( 1 );
 264     }
 265
 266     if( (p_vout->p_sys->xv_port = XVideoGetPort( p_vout->p_sys->p_display ))<0 )
 267         return 1;
 268     intf_DbgMsg( "Using xv port %d" , p_vout->p_sys->xv_port );
 269
 270 #if 0
 271     /* XXX The brightness and contrast values should be read from environment
 272      * XXX variables... */
 273     XVideoSetAttribute( p_vout, "XV_BRIGHTNESS", 0.5 );
 274     XVideoSetAttribute( p_vout, "XV_CONTRAST",   0.5 );
 275 #endif
 276
 277     p_vout->p_sys->b_mouse_pointer_visible = 1;
 278
 279     /* Disable screen saver and return */
 280     XVideoDisableScreenSaver( p_vout );
 281
 282     return( 0 );
 283 }
 284
 285 /*****************************************************************************
 286  * vout_Init: initialize XVideo video thread output method
 287  *****************************************************************************/
 288 static int vout_Init( vout_thread_t *p_vout )
 289 {
 290 #ifdef SYS_DARWIN1_3
 291     /* FIXME : As of 2001-03-16, XFree4 for MacOS X does not support Xshm. */
 292     p_vout->p_sys->b_shm = 0;
 293 #endif
 294     p_vout->b_need_render = 0;
 295     p_vout->p_sys->i_image_width = p_vout->p_sys->i_image_height = 0;
 296
 297     return( 0 );
 298 }
 299
 300 /*****************************************************************************
 301  * vout_End: terminate XVideo video thread output method
 302  *****************************************************************************
 303  * Destroy the XvImage. It is called at the end of the thread, but also each
 304  * time the image is resized.
 305  *****************************************************************************/
 306 static void vout_End( vout_thread_t *p_vout )
 307 {
 308     XVideoDestroyShmImage( p_vout, p_vout->p_sys->p_xvimage,
 309                            &p_vout->p_sys->shm_info );
 310 }
 311
 312 /*****************************************************************************
 313  * vout_Destroy: destroy XVideo video thread output method
 314  *****************************************************************************
 315  * Terminate an output method created by vout_Create
 316  *****************************************************************************/
 317 static void vout_Destroy( vout_thread_t *p_vout )
 318 {
 319     XVideoEnableScreenSaver( p_vout );
 320     XVideoDestroyWindow( p_vout );
 321     XCloseDisplay( p_vout->p_sys->p_display );
 322
 323     /* Destroy structure */
 324     free( p_vout->p_sys );
 325 }
 326
 327 /*****************************************************************************
 328  * vout_Manage: handle X11 events
 329  *****************************************************************************
 330  * This function should be called regularly by video output thread. It manages
 331  * X11 events and allows window resizing. It returns a non null value on
 332  * error.
 333  *
 334  * XXX  Should "factor-out" common code in this and the "same" fn in the x11
 335  * XXX  plugin!
 336  *****************************************************************************/
 337 static int vout_Manage( vout_thread_t *p_vout )
 338 {
 339     XEvent      xevent;                                         /* X11 event */
 340     char        i_key;                                    /* ISO Latin-1 key */
 341     KeySym      x_key_symbol;
 342
 343     /* Handle X11 events: ConfigureNotify events are parsed to know if the
 344      * output window's size changed, MapNotify and UnmapNotify to know if the
 345      * window is mapped (and if the display is useful), and ClientMessages
 346      * to intercept window destruction requests */
 347     while( XCheckWindowEvent( p_vout->p_sys->p_display, p_vout->p_sys->window,
 348                               StructureNotifyMask | KeyPressMask |
 349                               ButtonPressMask | ButtonReleaseMask |
 350                               PointerMotionMask, &xevent )
 351            == True )
 352     {
 353         /* ConfigureNotify event: prepare  */
 354         if( (xevent.type == ConfigureNotify)
 355             /*&& ((xevent.xconfigure.width != p_vout->p_sys->i_window_width)
 356                 || (xevent.xconfigure.height != p_vout->p_sys->i_window_height))*/ )
 357         {
 358             /* Update dimensions */
 359             p_vout->p_sys->i_window_width = xevent.xconfigure.width;
 360             p_vout->p_sys->i_window_height = xevent.xconfigure.height;
 361         }
 362         /* MapNotify event: change window status and disable screen saver */
 363         else if( xevent.type == MapNotify)
 364         {
 365             if( (p_vout != NULL) && !p_vout->b_active )
 366             {
 367                 XVideoDisableScreenSaver( p_vout );
 368                 p_vout->b_active = 1;
 369             }
 370         }
 371         /* UnmapNotify event: change window status and enable screen saver */
 372         else if( xevent.type == UnmapNotify )
 373         {
 374             if( (p_vout != NULL) && p_vout->b_active )
 375             {
 376                 XVideoEnableScreenSaver( p_vout );
 377                 p_vout->b_active = 0;
 378             }
 379         }
 380         /* Keyboard event */
 381         else if( xevent.type == KeyPress )
 382         {
 383             /* We may have keys like F1 trough F12, ESC ... */
 384             x_key_symbol = XKeycodeToKeysym( p_vout->p_sys->p_display,
 385                                              xevent.xkey.keycode, 0 );
 386             switch( x_key_symbol )
 387             {
 388                  case XK_Escape:
 389                      p_main->p_intf->b_die = 1;
 390                      break;
 391                  case XK_Menu:
 392                      p_main->p_intf->b_menu_change = 1;
 393                      break;
 394                  default:
 395                      /* "Normal Keys"
 396                       * The reason why I use this instead of XK_0 is that
 397                       * with XLookupString, we don't have to care about
 398                       * keymaps. */
 399
 400                     if( XLookupString( &xevent.xkey, &i_key, 1, NULL, NULL ) )
 401                     {
 402                         switch( i_key )
 403                         {
 404                         case 'q':
 405                         case 'Q':
 406                             p_main->p_intf->b_die = 1;
 407                             break;
 408                         case 'f':
 409                         case 'F':
 410                             p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 411                             break;
 412                         case '0':
 413                             network_ChannelJoin( 0 );
 414                             break;
 415                         case '1':
 416                             network_ChannelJoin( 1 );
 417                             break;
 418                         case '2':
 419                             network_ChannelJoin( 2 );
 420                             break;
 421                         case '3':
 422                             network_ChannelJoin( 3 );
 423                             break;
 424                         case '4':
 425                             network_ChannelJoin( 4 );
 426                             break;
 427                         case '5':
 428                             network_ChannelJoin( 5 );
 429                             break;
 430                         case '6':
 431                             network_ChannelJoin( 6 );
 432                             break;
 433                         case '7':
 434                             network_ChannelJoin( 7 );
 435                             break;
 436                         case '8':
 437                             network_ChannelJoin( 8 );
 438                             break;
 439                         case '9':
 440                             network_ChannelJoin( 9 );
 441                             break;
 442                         default:
 443                             if( intf_ProcessKey( p_main->p_intf,
 444                                                  (char )i_key ) )
 445                             {
 446                                intf_DbgMsg( "unhandled key '%c' (%i)",
 447                                             (char)i_key, i_key );
 448                             }
 449                             break;
 450                         }
 451                     }
 452                 break;
 453             }
 454         }
 455         /* Mouse click */
 456         else if( xevent.type == ButtonPress )
 457         {
 458             switch( ((XButtonEvent *)&xevent)->button )
 459             {
 460                 case Button1:
 461                     /* in this part we will eventually manage
 462                      * clicks for DVD navigation for instance */
 463                     break;
 464             }
 465         }
 466         /* Mouse release */
 467         else if( xevent.type == ButtonRelease )
 468         {
 469             switch( ((XButtonEvent *)&xevent)->button )
 470             {
 471                 case Button3:
 472                     /* FIXME: need locking ! */
 473                     p_main->p_intf->b_menu_change = 1;
 474                     break;
 475             }
 476         }
 477         /* Mouse move */
 478         else if( xevent.type == MotionNotify )
 479         {
 480             p_vout->p_sys->i_time_mouse_last_moved = mdate();
 481             p_vout->p_sys->b_mouse_pointer_visible = 1;
 482             XVideoSetMousePointer( p_vout );
 483         }
 484         /* Other event */
 485         else
 486         {
 487             intf_WarnMsg( 3, "%p -> unhandled event type %d received",
 488                          p_vout, xevent.type );
 489         }
 490     }
 491
 492     /* Handle events for YUV video output sub-window */
 493     while( XCheckWindowEvent( p_vout->p_sys->p_display,
 494                               p_vout->p_sys->yuv_window,
 495                               ExposureMask, &xevent ) == True )
 496     {
 497         /* Window exposed (only handled if stream playback is paused) */
 498         if( xevent.type == Expose )
 499         {
 500             if( ((XExposeEvent *)&xevent)->count == 0 )
 501                 /* (if this is the last a collection of expose events...) */
 502                 if( p_main->p_intf->p_input )
 503                     if( PAUSE_S ==
 504                             p_main->p_intf->p_input->stream.control.i_status )
 505                         XVideoDisplay( p_vout );
 506         }
 507     }
 508
 509     /* ClientMessage event - only WM_PROTOCOLS with WM_DELETE_WINDOW data
 510      * are handled - according to the man pages, the format is always 32
 511      * in this case */
 512     while( XCheckTypedEvent( p_vout->p_sys->p_display,
 513                              ClientMessage, &xevent ) )
 514     {
 515         if( (xevent.xclient.message_type == p_vout->p_sys->wm_protocols)
 516             && (xevent.xclient.data.l[0] == p_vout->p_sys->wm_delete_window ) )
 517         {
 518             p_main->p_intf->b_die = 1;
 519         }
 520         else
 521         {
 522             intf_DbgMsg( "%p -> unhandled ClientMessage received", p_vout );
 523         }
 524     }
 525
 526     if ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE )
 527     {
 528         intf_DbgMsg( "vout: changing full-screen status" );
 529
 530         p_vout->b_fullscreen = !p_vout->b_fullscreen;
 531
 532         /* Get rid of the old window */
 533         XVideoDestroyWindow( p_vout );
 534
 535         /* And create a new one */
 536         if( XVideoCreateWindow( p_vout ) )
 537         {
 538             intf_ErrMsg( "vout error: cannot create X11 window" );
 539             XCloseDisplay( p_vout->p_sys->p_display );
 540
 541             free( p_vout->p_sys );
 542             return( 1 );
 543         }
 544     }
 545
 546
 547     if( (p_vout->i_changes & VOUT_GRAYSCALE_CHANGE))
 548     {
 549         /* FIXME: clear flags ?? */
 550     }
 551
 552     /*
 553      * Size change
 554      */
 555     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 556     {
 557         intf_DbgMsg( "vout: resizing window" );
 558         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 559         /* Nothing to do here...
 560          * vout_Display() detects size changes of the image to be displayed and
 561          * re-creates the XvImage.*/
 562         intf_Msg( "vout: video display resized (%dx%d)",
 563                   p_vout->i_width, p_vout->i_height );
 564     }
 565
 566     /* Autohide Cursor */
 567     if( p_vout->p_sys->b_mouse_pointer_visible &&
 568         mdate() - p_vout->p_sys->i_time_mouse_last_moved > 2000000 )
 569     {
 570         p_vout->p_sys->b_mouse_pointer_visible = 0;
 571         XVideoSetMousePointer( p_vout );
 572     }
 573
 574     return 0;
 575 }
 576
 577 /*****************************************************************************
 578  * vout_Display: displays previously rendered output
 579  *****************************************************************************
 580  * This function sends the currently rendered image to X11 server.
 581  * (The Xv extension takes care of "double-buffering".)
 582  *****************************************************************************/
 583 static void vout_Display( vout_thread_t *p_vout )
 584 {
 585     boolean_t b_draw = 1;
 586     int i_size = p_vout->p_rendered_pic->i_width *
 587                    p_vout->p_rendered_pic->i_height;
 588
 589     if( XVideoUpdateImgSizeIfRequired( p_vout ) )
 590         return;
 591
 592     switch( p_vout->p_rendered_pic->i_type )
 593     {
 594     case YUV_422_PICTURE:
 595         intf_ErrMsg( "vout error: YUV_422_PICTURE not (yet) supported" );
 596         b_draw = 0;
 597         break;
 598
 599     case YUV_444_PICTURE:
 600         intf_ErrMsg( "vout error: YUV_444_PICTURE not (yet) supported" );
 601         b_draw = 0;
 602         break;
 603
 604     case YUV_420_PICTURE:
 605         memcpy( p_vout->p_sys->p_xvimage->data,
 606                 p_vout->p_rendered_pic->p_y, i_size );
 607         memcpy( p_vout->p_sys->p_xvimage->data + ( i_size ),
 608                 p_vout->p_rendered_pic->p_v, i_size / 4 );
 609         memcpy( p_vout->p_sys->p_xvimage->data + ( i_size ) + ( i_size / 4 ),
 610                 p_vout->p_rendered_pic->p_u, i_size / 4 );
 611         break;
 612     }
 613
 614     if( b_draw )
 615         XVideoDisplay( p_vout );
 616 }
 617
 618 static void vout_SetPalette( p_vout_thread_t p_vout,
 619                              u16 *red, u16 *green, u16 *blue, u16 *transp )
 620 {
 621     return;
 622 }
 623
 624 /* following functions are local */
 625
 626 /*****************************************************************************
 627  * XVideoUpdateImgSizeIfRequired
 628  *****************************************************************************
 629  * This function checks to see if the image to be displayed is of a different
 630  * size to the last image displayed. If so, the old shm block must be
 631  * destroyed and a new one created.
 632  * Note: the "image size" is the size of the image to be passed to the Xv
 633  * extension (which is probably different to the size of the output window).
 634  *****************************************************************************/
 635 static int XVideoUpdateImgSizeIfRequired( vout_thread_t *p_vout )
 636 {
 637     int i_img_width         = p_vout->p_rendered_pic->i_width;
 638     int i_img_height        = p_vout->p_rendered_pic->i_height;
 639
 640     if( p_vout->p_sys->i_image_width != i_img_width
 641             || p_vout->p_sys->i_image_height != i_img_height )
 642     {
 643         p_vout->p_sys->i_image_width  = i_img_width;
 644         p_vout->p_sys->i_image_height = i_img_height;
 645
 646         /* Destroy XvImage to change its size */
 647         vout_End( p_vout );
 648             /* Note: vout_End does nothing if no XvImage to destroy. */
 649
 650         /* Create XvImage using XShm extension */
 651         if( XVideoCreateShmImage( p_vout->p_sys->p_display,
 652                                   p_vout->p_sys->xv_port,
 653                                   &p_vout->p_sys->p_xvimage,
 654                                   &p_vout->p_sys->shm_info,
 655                                   i_img_width, i_img_height ) )
 656         {
 657             intf_ErrMsg( "vout: failed to create xvimage." );
 658             p_vout->p_sys->i_image_width = 0;
 659             return( 1 );
 660         }
 661
 662         /* Set bytes per line and initialize buffers */
 663         p_vout->i_bytes_per_line =
 664             (p_vout->p_sys->p_xvimage->data_size) /
 665             (p_vout->p_sys->p_xvimage->height);
 666
 667         /* vout_SetBuffers( p_vout, p_vout->p_sys->p_xvimage->data ); */
 668     }
 669
 670     return( 0 );
 671 }
 672
 673 /*****************************************************************************
 674  * XVideoCheckForXv: check for the XVideo extension
 675  *****************************************************************************/
 676 static int XVideoCheckForXv( Display *dpy )
 677 {
 678     unsigned int i;
 679
 680     switch( XvQueryExtension( dpy, &i, &i, &i, &i, &i ) )
 681     {
 682         case Success:
 683             return( 1 );
 684
 685         case XvBadExtension:
 686             intf_ErrMsg( "vout error: XvBadExtension" );
 687             return( 0 );
 688
 689         case XvBadAlloc:
 690             intf_ErrMsg( "vout error: XvBadAlloc" );
 691             return( 0 );
 692
 693         default:
 694             intf_ErrMsg( "vout error: XvQueryExtension failed" );
 695             return( 0 );
 696     }
 697 }
 698
 699 /*****************************************************************************
 700  * XVideoCreateWindow: open and set-up XVideo main window
 701  *****************************************************************************/
 702 static int XVideoCreateWindow( vout_thread_t *p_vout )
 703 {
 704     XSizeHints              xsize_hints;
 705     XSetWindowAttributes    xwindow_attributes;
 706     XGCValues               xgcvalues;
 707     XEvent                  xevent;
 708     Atom                    prop;
 709     mwmhints_t              mwmhints;
 710
 711     boolean_t               b_expose;
 712     boolean_t               b_configure_notify;
 713     boolean_t               b_map_notify;
 714
 715
 716     /* Set main window's size */
 717     /* If we're full screen, we're full screen! */
 718     if( p_vout->b_fullscreen )
 719     {
 720         p_vout->p_sys->i_window_width = DisplayWidth( p_vout->p_sys->p_display,
 721                                                       p_vout->p_sys->i_screen );
 722         p_vout->p_sys->i_window_height =  DisplayHeight( p_vout->p_sys->p_display,
 723                                                          p_vout->p_sys->i_screen );
 724 /*      p_vout->i_width =  p_vout->p_sys->i_window_width;
 725         p_vout->i_height = p_vout->p_sys->i_window_height; */
 726     }
 727     else
 728     {
 729         p_vout->p_sys->i_window_width =  main_GetIntVariable( VOUT_WIDTH_VAR,
 730                                                        VOUT_WIDTH_DEFAULT );
 731         p_vout->p_sys->i_window_height = main_GetIntVariable( VOUT_HEIGHT_VAR,
 732                                                        VOUT_HEIGHT_DEFAULT );
 733     }
 734
 735     /* Prepare window manager hints and properties */
 736     xsize_hints.base_width          = p_vout->p_sys->i_window_width;
 737     xsize_hints.base_height         = p_vout->p_sys->i_window_height;
 738     xsize_hints.flags               = PSize;
 739     p_vout->p_sys->wm_protocols     = XInternAtom( p_vout->p_sys->p_display,
 740                                                    "WM_PROTOCOLS", True );
 741     p_vout->p_sys->wm_delete_window = XInternAtom( p_vout->p_sys->p_display,
 742                                                    "WM_DELETE_WINDOW", True );
 743
 744     /* Prepare window attributes */
 745     xwindow_attributes.background_pixel = BlackPixel( p_vout->p_sys->p_display,
 746                                                       p_vout->p_sys->i_screen );
 747
 748     xwindow_attributes.event_mask = ExposureMask | StructureNotifyMask;
 749
 750     /* Create the window and set hints - the window must receive ConfigureNotify
 751      * events, and, until it is displayed, Expose and MapNotify events. */
 752     p_vout->p_sys->window =
 753             XCreateWindow( p_vout->p_sys->p_display,
 754                            DefaultRootWindow( p_vout->p_sys->p_display ),
 755                            0, 0,
 756                            p_vout->p_sys->i_window_width,
 757                            p_vout->p_sys->i_window_height, 1,
 758                            0, InputOutput, 0,
 759                            CWBackPixel | CWEventMask,
 760                            &xwindow_attributes );
 761
 762     if ( p_vout->b_fullscreen )
 763     {
 764         prop = XInternAtom(p_vout->p_sys->p_display, "_MOTIF_WM_HINTS", False);
 765         mwmhints.flags = MWM_HINTS_DECORATIONS;
 766         mwmhints.decorations = 0;
 767         XChangeProperty( p_vout->p_sys->p_display, p_vout->p_sys->window,
 768                          prop, prop, 32, PropModeReplace,
 769                          (unsigned char *)&mwmhints, PROP_MWM_HINTS_ELEMENTS );
 770
 771         XSetTransientForHint( p_vout->p_sys->p_display,
 772                               p_vout->p_sys->window, None );
 773         XRaiseWindow( p_vout->p_sys->p_display, p_vout->p_sys->window );
 774     }
 775
 776
 777     /* Set window manager hints and properties: size hints, command,
 778      * window's name, and accepted protocols */
 779     XSetWMNormalHints( p_vout->p_sys->p_display, p_vout->p_sys->window,
 780                        &xsize_hints );
 781     XSetCommand( p_vout->p_sys->p_display, p_vout->p_sys->window,
 782                  p_main->ppsz_argv, p_main->i_argc );
 783     XStoreName( p_vout->p_sys->p_display, p_vout->p_sys->window,
 784                 VOUT_TITLE " (XVideo output)" );
 785
 786     if( (p_vout->p_sys->wm_protocols == None)        /* use WM_DELETE_WINDOW */
 787         || (p_vout->p_sys->wm_delete_window == None)
 788         || !XSetWMProtocols( p_vout->p_sys->p_display, p_vout->p_sys->window,
 789                              &p_vout->p_sys->wm_delete_window, 1 ) )
 790     {
 791         /* WM_DELETE_WINDOW is not supported by window manager */
 792         intf_Msg( "vout error: missing or bad window manager" );
 793     }
 794
 795     /* Creation of a graphic context that doesn't generate a GraphicsExpose
 796      * event when using functions like XCopyArea */
 797     xgcvalues.graphics_exposures = False;
 798     p_vout->p_sys->gc = XCreateGC( p_vout->p_sys->p_display,
 799                                    p_vout->p_sys->window,
 800                                    GCGraphicsExposures, &xgcvalues);
 801
 802     /* Send orders to server, and wait until window is displayed - three
 803      * events must be received: a MapNotify event, an Expose event allowing
 804      * drawing in the window, and a ConfigureNotify to get the window
 805      * dimensions. Once those events have been received, only ConfigureNotify
 806      * events need to be received. */
 807     b_expose = 0;
 808     b_configure_notify = 0;
 809     b_map_notify = 0;
 810     XMapWindow( p_vout->p_sys->p_display, p_vout->p_sys->window);
 811     do
 812     {
 813         XNextEvent( p_vout->p_sys->p_display, &xevent);
 814         if( (xevent.type == Expose)
 815             && (xevent.xexpose.window == p_vout->p_sys->window) )
 816         {
 817             b_expose = 1;
 818         }
 819         else if( (xevent.type == MapNotify)
 820                  && (xevent.xmap.window == p_vout->p_sys->window) )
 821         {
 822             b_map_notify = 1;
 823         }
 824         else if( (xevent.type == ConfigureNotify)
 825                  && (xevent.xconfigure.window == p_vout->p_sys->window) )
 826         {
 827             b_configure_notify = 1;
 828             p_vout->p_sys->i_window_width = xevent.xconfigure.width;
 829             p_vout->p_sys->i_window_height = xevent.xconfigure.height;
 830         }
 831     } while( !( b_expose && b_configure_notify && b_map_notify ) );
 832
 833     XSelectInput( p_vout->p_sys->p_display, p_vout->p_sys->window,
 834                   StructureNotifyMask | KeyPressMask |
 835                   ButtonPressMask | ButtonReleaseMask |
 836                   PointerMotionMask );
 837
 838     if( p_vout->b_fullscreen )
 839     {
 840         XSetInputFocus( p_vout->p_sys->p_display, p_vout->p_sys->window,
 841                         RevertToNone, CurrentTime );
 842         XMoveWindow( p_vout->p_sys->p_display, p_vout->p_sys->window, 0, 0 );
 843     }
 844
 845     /* Create YUV output sub-window. */
 846     p_vout->p_sys->yuv_window=XCreateSimpleWindow( p_vout->p_sys->p_display,
 847                          p_vout->p_sys->window, 0, 0, 1, 1, 0,
 848                          BlackPixel( p_vout->p_sys->p_display,
 849                                          p_vout->p_sys->i_screen ),
 850                          WhitePixel( p_vout->p_sys->p_display,
 851                                          p_vout->p_sys->i_screen ) );
 852
 853     p_vout->p_sys->yuv_gc = XCreateGC( p_vout->p_sys->p_display,
 854                                         p_vout->p_sys->yuv_window,
 855                                         GCGraphicsExposures, &xgcvalues );
 856
 857     XSetWindowBackground( p_vout->p_sys->p_display, p_vout->p_sys->yuv_window,
 858              BlackPixel(p_vout->p_sys->p_display, p_vout->p_sys->i_screen ) );
 859
 860     XMapWindow( p_vout->p_sys->p_display, p_vout->p_sys->yuv_window );
 861     XSelectInput( p_vout->p_sys->p_display, p_vout->p_sys->yuv_window,
 862                   ExposureMask );
 863
 864
 865     XVideoSetMousePointer( p_vout );
 866
 867     return( 0 );
 868 }
 869
 870 static void XVideoDestroyWindow( vout_thread_t *p_vout )
 871 {
 872     XFreeGC( p_vout->p_sys->p_display, p_vout->p_sys->yuv_gc );
 873     XDestroyWindow( p_vout->p_sys->p_display, p_vout->p_sys->yuv_window );
 874
 875     XUnmapWindow( p_vout->p_sys->p_display, p_vout->p_sys->window );
 876     XFreeGC( p_vout->p_sys->p_display, p_vout->p_sys->gc );
 877     XDestroyWindow( p_vout->p_sys->p_display, p_vout->p_sys->window );
 878 }
 879
 880 /*****************************************************************************
 881  * XVideoCreateShmImage: create an XvImage using shared memory extension
 882  *****************************************************************************
 883  * Prepare an XvImage for display function.
 884  * The order of the operations respects the recommandations of the mit-shm
 885  * document by J.Corbet and K.Packard. Most of the parameters were copied from
 886  * there.
 887  *****************************************************************************/
 888 static int XVideoCreateShmImage( Display* dpy, int xv_port,
 889                                     XvImage **pp_xvimage,
 890                                     XShmSegmentInfo *p_shm_info,
 891                                     int i_width, int i_height )
 892 {
 893     *pp_xvimage = XvShmCreateImage( dpy, xv_port,
 894                                     GUID_YUV12_PLANAR, 0,
 895                                     i_width, i_height,
 896                                     p_shm_info );
 897     if( !(*pp_xvimage) )
 898     {
 899         intf_ErrMsg( "vout error: XvShmCreateImage failed." );
 900         return( -1 );
 901     }
 902
 903     p_shm_info->shmid    = shmget( IPC_PRIVATE, (*pp_xvimage)->data_size,
 904                                    IPC_CREAT | 0777 );
 905     if( p_shm_info->shmid < 0)                                      /* error */
 906     {
 907         intf_ErrMsg( "vout error: cannot allocate shared image data (%s)",
 908                     strerror(errno));
 909         return( 1 );
 910     }
 911
 912     p_shm_info->shmaddr  = (*pp_xvimage)->data = shmat( p_shm_info->shmid,
 913                                                         0, 0 );
 914     p_shm_info->readOnly = False;
 915
 916     /* Mark the shm segment to be removed when there will be no more
 917      * attachements, so it is automatic on process exit or after shmdt */
 918     shmctl( p_shm_info->shmid, IPC_RMID, 0 );
 919
 920     if( !XShmAttach( dpy, p_shm_info ) )
 921     {
 922         intf_ErrMsg( "vout error: XShmAttach failed" );
 923         shmdt( p_shm_info->shmaddr );
 924         return( -1 );
 925     }
 926
 927     /* Send image to X server. This instruction is required, since having
 928      * built a Shm XImage and not using it causes an error on XCloseDisplay */
 929     XFlush( dpy );
 930
 931     return( 0 );
 932 }
 933
 934 /*****************************************************************************
 935  * XVideoDestroyShmImage
 936  *****************************************************************************
 937  * Destroy XImage AND associated data. Detach shared memory segment from
 938  * server and process, then free it. If pointer is NULL, the image won't be
 939  * destroyed (see vout_ManageOutputMethod())
 940  *****************************************************************************/
 941 static void XVideoDestroyShmImage( vout_thread_t *p_vout, XvImage *p_xvimage,
 942                                    XShmSegmentInfo *p_shm_info )
 943 {
 944     /* If pointer is NULL, do nothing */
 945     if( p_xvimage == NULL )
 946     {
 947         return;
 948     }
 949
 950     XShmDetach( p_vout->p_sys->p_display, p_shm_info );/* detach from server */
 951 #if 0
 952     XDestroyImage( p_ximage ); /* XXX */
 953 #endif
 954
 955     if( shmdt( p_shm_info->shmaddr ) )  /* detach shared memory from process */
 956     {                                   /* also automatic freeing...         */
 957         intf_ErrMsg( "vout error: cannot detach shared memory (%s)",
 958                      strerror(errno) );
 959     }
 960 }
 961
 962 /*****************************************************************************
 963  * XVideoEnableScreenSaver: enable screen saver
 964  *****************************************************************************
 965  * This function enable the screen saver on a display after it had been
 966  * disabled by XDisableScreenSaver. Both functions use a counter mechanism to
 967  * know wether the screen saver can be activated or not: if n successive calls
 968  * are made to XDisableScreenSaver, n successive calls to XEnableScreenSaver
 969  * will be required before the screen saver could effectively be activated.
 970  *****************************************************************************/
 971 void XVideoEnableScreenSaver( vout_thread_t *p_vout )
 972 {
 973     intf_DbgMsg( "intf: enabling screen saver" );
 974     XSetScreenSaver( p_vout->p_sys->p_display, p_vout->p_sys->i_ss_timeout,
 975                      p_vout->p_sys->i_ss_interval,
 976                      p_vout->p_sys->i_ss_blanking,
 977                      p_vout->p_sys->i_ss_exposure );
 978 }
 979
 980 /*****************************************************************************
 981  * XVideoDisableScreenSaver: disable screen saver
 982  *****************************************************************************
 983  * See XEnableScreenSaver
 984  *****************************************************************************/
 985 void XVideoDisableScreenSaver( vout_thread_t *p_vout )
 986 {
 987     /* Save screen saver informations */
 988     XGetScreenSaver( p_vout->p_sys->p_display, &p_vout->p_sys->i_ss_timeout,
 989                      &p_vout->p_sys->i_ss_interval,
 990                      &p_vout->p_sys->i_ss_blanking,
 991                      &p_vout->p_sys->i_ss_exposure );
 992
 993     /* Disable screen saver */
 994     intf_DbgMsg( "intf: disabling screen saver" );
 995     XSetScreenSaver( p_vout->p_sys->p_display, 0,
 996                      p_vout->p_sys->i_ss_interval,
 997                      p_vout->p_sys->i_ss_blanking,
 998                      p_vout->p_sys->i_ss_exposure );
 999 }
1000
1001 /*****************************************************************************
1002  * XVideoSetMousePointer: hide or show the mouse pointer
1003  *****************************************************************************
1004  * This function hides the X pointer if requested.
1005  *****************************************************************************/
1006 void XVideoSetMousePointer( const vout_thread_t *p_vout )
1007 {
1008     static Cursor blank_cursor;
1009     static boolean_t b_created_blank_cursor = 0;
1010
1011     if( !p_vout->p_sys->b_mouse_pointer_visible )
1012     {
1013         if( !b_created_blank_cursor )
1014         {
1015             XColor color;
1016             Pixmap blank = XCreatePixmap( p_vout->p_sys->p_display,
1017                                DefaultRootWindow(p_vout->p_sys->p_display),
1018                                1, 1, 1 );
1019
1020             XParseColor( p_vout->p_sys->p_display,
1021                          XCreateColormap( p_vout->p_sys->p_display,
1022                                           DefaultRootWindow(
1023                                                   p_vout->p_sys->p_display ),
1024                                           DefaultVisual(
1025                                                   p_vout->p_sys->p_display,
1026                                                   p_vout->p_sys->i_screen ),
1027                                           AllocNone ),
1028                          "black", &color );
1029
1030             blank_cursor = XCreatePixmapCursor( p_vout->p_sys->p_display,
1031                            blank, blank, &color, &color, 1, 1 );
1032
1033             b_created_blank_cursor = 1;
1034         }
1035         XDefineCursor( p_vout->p_sys->p_display,
1036                        p_vout->p_sys->window, blank_cursor );
1037     }
1038     else
1039     {
1040         XUndefineCursor( p_vout->p_sys->p_display, p_vout->p_sys->window );
1041     }
1042 }
1043
1044 /* This based on some code in SetBufferPicture... At the moment it's only
1045  * used by the xvideo plugin, but others may want to use it. */
1046 static void XVideoOutputCoords( const picture_t *p_pic, const boolean_t scale,
1047                                 const int win_w, const int win_h,
1048                                 int *dx, int *dy, int *w, int *h)
1049 {
1050     if( !scale )
1051     {
1052         *w = p_pic->i_width; *h = p_pic->i_height;
1053     }
1054     else
1055     {
1056         *w = win_w;
1057         switch( p_pic->i_aspect_ratio )
1058         {
1059             case AR_3_4_PICTURE:
1060                 *h = win_w * 3 / 4;
1061                 break;
1062
1063             case AR_16_9_PICTURE:
1064                 *h = win_w * 9 / 16;
1065                 break;
1066
1067             case AR_221_1_PICTURE:
1068                 *h = win_w * 100 / 221;
1069                 break;
1070
1071             case AR_SQUARE_PICTURE:
1072             default:
1073                 *h = win_w * p_pic->i_height / p_pic->i_width;
1074                 break;
1075         }
1076
1077         if( *h > win_h )
1078         {
1079             *h = win_h;
1080             switch( p_pic->i_aspect_ratio )
1081             {
1082                 case AR_3_4_PICTURE:
1083                     *w = win_h * 4 / 3;
1084                     break;
1085
1086                 case AR_16_9_PICTURE:
1087                     *w = win_h * 16 / 9;
1088                     break;
1089
1090                 case AR_221_1_PICTURE:
1091                     *w = win_h * 221 / 100;
1092                     break;
1093
1094                 case AR_SQUARE_PICTURE:
1095                 default:
1096                     *w = win_h * p_pic->i_width / p_pic->i_height;
1097                     break;
1098             }
1099         }
1100     }
1101
1102     /* Set picture position */
1103     *dx = (win_w - *w) / 2;
1104     *dy = (win_h - *h) / 2;
1105 }
1106
1107
1108 static int XVideoGetPort( Display *dpy )
1109 {
1110     int            i, i_adaptors;
1111     int            xv_port = -1;
1112     XvAdaptorInfo *adaptor_info;
1113
1114     switch( XvQueryAdaptors( dpy, DefaultRootWindow( dpy ),
1115                              &i_adaptors, &adaptor_info ) )
1116     {
1117         case Success:
1118             break;
1119
1120         case XvBadExtension:
1121             intf_ErrMsg( "vout error: XvBadExtension for XvQueryAdaptors" );
1122             return( -1 );
1123
1124         case XvBadAlloc:
1125             intf_ErrMsg( "vout error: XvBadAlloc for XvQueryAdaptors" );
1126             return( -1 );
1127
1128         default:
1129             intf_ErrMsg( "vout error: XvQueryAdaptors failed" );
1130             return( -1 );
1131     }
1132
1133     for( i=0; i < i_adaptors && xv_port == -1; ++i )
1134         if( ( adaptor_info[ i ].type & XvInputMask ) &&
1135             ( adaptor_info[ i ].type & XvImageMask ) )
1136         {
1137             /* check that port supports YUV12 planar format... */
1138             int port = adaptor_info[ i ].base_id;
1139             int i_num_formats, i;
1140             XvImageFormatValues *imageFormats;
1141
1142             imageFormats = XvListImageFormats( dpy, port, &i_num_formats );
1143
1144             for( i=0; i < i_num_formats && xv_port == -1; ++i )
1145                 if( imageFormats[ i ].id == GUID_YUV12_PLANAR )
1146                     xv_port = port;
1147
1148             if( xv_port == -1 )
1149                 intf_WarnMsg( 3, "vout: XVideo image input port %d "
1150                         "does not support the YUV12 planar format which is "
1151                         "currently required by the xvideo output plugin.",
1152                         port );
1153
1154             if( imageFormats )
1155                 XFree( imageFormats );
1156         }
1157
1158     if( i_adaptors > 0 )
1159         XvFreeAdaptorInfo(adaptor_info);
1160
1161     if( xv_port == -1 )
1162         intf_ErrMsg( "vout error: didn't find a suitable Xvideo image input port." );
1163
1164     return( xv_port );
1165 }
1166
1167
1168 /*****************************************************************************
1169  * XVideoDisplay: display image
1170  *****************************************************************************
1171  * This function displays the image stored in p_vout->p_sys->p_xvimage.
1172  * The image is scaled to fit in the output window (and to have the correct
1173  * aspect ratio).
1174  *****************************************************************************/
1175 static void XVideoDisplay( vout_thread_t *p_vout )
1176 {
1177     int     i_dest_width, i_dest_height, i_dest_x, i_dest_y;
1178
1179     if( !p_vout->p_sys->p_xvimage ) return;
1180
1181     XVideoOutputCoords( p_vout->p_rendered_pic, p_vout->b_scale,
1182                         p_vout->p_sys->i_window_width,
1183                         p_vout->p_sys->i_window_height,
1184                         &i_dest_x, &i_dest_y,
1185                         &i_dest_width, &i_dest_height);
1186
1187     XvShmPutImage( p_vout->p_sys->p_display, p_vout->p_sys->xv_port,
1188                    p_vout->p_sys->yuv_window, p_vout->p_sys->gc,
1189                    p_vout->p_sys->p_xvimage,
1190                    0 /*src_x*/, 0 /*src_y*/,
1191                    p_vout->p_rendered_pic->i_width,
1192                    p_vout->p_rendered_pic->i_height,
1193                    0 /*dest_x*/, 0 /*dest_y*/, i_dest_width, i_dest_height,
1194                    True );
1195
1196      XResizeWindow( p_vout->p_sys->p_display, p_vout->p_sys->yuv_window,
1197              i_dest_width, i_dest_height );
1198      XMoveWindow( p_vout->p_sys->p_display, p_vout->p_sys->yuv_window,
1199              i_dest_x, i_dest_y );
1200 }
1201
1202 #if 0
1203 /*****************************************************************************
1204  * XVideoSetAttribute
1205  *****************************************************************************
1206  * This function can be used to set attributes, e.g. XV_BRIGHTNESS and
1207  * XV_CONTRAST. "f_value" should be in the range of 0 to 1.
1208  *****************************************************************************/
1209 static void XVideoSetAttribute( vout_thread_t *p_vout,
1210                                 char *attr_name, float f_value )
1211 {
1212     int             i_attrib;
1213     XvAttribute    *p_attrib;
1214     Display        *p_dpy   = p_vout->p_sys->p_display;
1215     int             xv_port = p_vout->p_sys->xv_port;
1216
1217     p_attrib = XvQueryPortAttributes( p_dpy, xv_port, &i_attrib );
1218
1219     do
1220     {
1221         i_attrib--;
1222
1223         if( i_attrib >= 0 && !strcmp( p_attrib[ i_attrib ].name, attr_name ) )
1224         {
1225             int i_sv = f_value * ( p_attrib[ i_attrib ].max_value
1226                                     - p_attrib[ i_attrib ].min_value + 1 )
1227                         + p_attrib[ i_attrib ].min_value;
1228
1229             XvSetPortAttribute( p_dpy, xv_port,
1230                             XInternAtom( p_dpy, attr_name, False ), i_sv );
1231             break;
1232         }
1233
1234     } while( i_attrib > 0 );
1235
1236     if( p_attrib )
1237         XFree( p_attrib );
1238 }
1239 #endif