git.sesse.net Git - vlc/blob - modules/video_output/fb.c

   1 /*****************************************************************************
   2  * fb.c : framebuffer plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Jean-Paul Saman
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <signal.h>                                      /* SIGUSR1, SIGUSR2 */
  30 #include <fcntl.h>                                                 /* open() */
  31 #include <unistd.h>                                               /* close() */
  32
  33 #include <termios.h>                                       /* struct termios */
  34 #include <sys/ioctl.h>
  35 #include <sys/mman.h>                                              /* mmap() */
  36
  37 #include <linux/fb.h>
  38 #include <linux/vt.h>                                                /* VT_* */
  39 #include <linux/kd.h>                                                 /* KD* */
  40
  41 #include <vlc/vlc.h>
  42 #include <vlc_vout.h>
  43
  44 /*****************************************************************************
  45  * Local prototypes
  46  *****************************************************************************/
  47 static int  Create    ( vlc_object_t * );
  48 static void Destroy   ( vlc_object_t * );
  49
  50 static int  Init      ( vout_thread_t * );
  51 static void End       ( vout_thread_t * );
  52 static int  Manage    ( vout_thread_t * );
  53 static void Display   ( vout_thread_t *, picture_t * );
  54
  55 static int  OpenDisplay    ( vout_thread_t * );
  56 static void CloseDisplay   ( vout_thread_t * );
  57 static void SwitchDisplay  ( int i_signal );
  58 static void TextMode       ( int i_tty );
  59 static void GfxMode        ( int i_tty );
  60
  61 /*****************************************************************************
  62  * Module descriptor
  63  *****************************************************************************/
  64 #define FB_DEV_VAR "fbdev"
  65
  66 #define DEVICE_TEXT N_("Framebuffer device")
  67 #define DEVICE_LONGTEXT N_( \
  68     "Framebuffer device to use for rendering (usually /dev/fb0).")
  69
  70 #define TTY_TEXT N_("Run fb on current tty.")
  71 #define TTY_LONGTEXT N_( \
  72     "Run framebuffer on current TTY device (default enabled). " \
  73     "(disable tty handling with caution)" );
  74
  75 #define CHROMA_TEXT N_("Chroma used.")
  76 #define CHROMA_LONGTEXT N_( \
  77     "Force use of a specific chroma for output. Default is I420." )
  78
  79 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  80 #define ASPECT_RATIO_LONGTEXT N_( \
  81     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  82
  83 vlc_module_begin();
  84     set_shortname( "Framebuffer" );
  85     set_category( CAT_VIDEO );
  86     set_subcategory( SUBCAT_VIDEO_VOUT );
  87     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
  88               VLC_FALSE );
  89     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, VLC_TRUE );
  90     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
  91                 VLC_TRUE );
  92     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
  93                 ASPECT_RATIO_LONGTEXT, VLC_TRUE );
  94     set_description( _("GNU/Linux console framebuffer video output") );
  95     set_capability( "video output", 30 );
  96     set_callbacks( Create, Destroy );
  97 vlc_module_end();
  98
  99 /*****************************************************************************
 100  * vout_sys_t: video output framebuffer method descriptor
 101  *****************************************************************************
 102  * This structure is part of the video output thread descriptor.
 103  * It describes the FB specific properties of an output thread.
 104  *****************************************************************************/
 105 struct vout_sys_t
 106 {
 107     /* System information */
 108     int                 i_tty;                          /* tty device handle */
 109     vlc_bool_t          b_tty;
 110     struct termios      old_termios;
 111
 112     /* Original configuration information */
 113     struct sigaction            sig_usr1;           /* USR1 previous handler */
 114     struct sigaction            sig_usr2;           /* USR2 previous handler */
 115     struct vt_mode              vt_mode;                 /* previous VT mode */
 116
 117     /* Framebuffer information */
 118     int                         i_fd;                       /* device handle */
 119     struct fb_var_screeninfo    old_info;       /* original mode information */
 120     struct fb_var_screeninfo    var_info;        /* current mode information */
 121     vlc_bool_t                  b_pan;     /* does device supports panning ? */
 122     struct fb_cmap              fb_cmap;                /* original colormap */
 123     uint16_t                    *p_palette;              /* original palette */
 124
 125     /* Video information */
 126     int i_width;
 127     int i_height;
 128     int i_aspect;
 129     int i_bytes_per_pixel;
 130     vlc_fourcc_t i_chroma;
 131
 132     /* Video memory */
 133     byte_t *    p_video;                                      /* base adress */
 134     size_t      i_page_size;                                    /* page size */
 135 };
 136
 137 /*****************************************************************************
 138  * Create: allocates FB video thread output method
 139  *****************************************************************************
 140  * This function allocates and initializes a FB vout method.
 141  *****************************************************************************/
 142 static int Create( vlc_object_t *p_this )
 143 {
 144     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 145     vout_sys_t    *p_sys;
 146     char          *psz_chroma;
 147     char          *psz_aspect;
 148     struct sigaction    sig_tty;                 /* sigaction for tty change */
 149     struct vt_mode      vt_mode;                          /* vt current mode */
 150     struct termios      new_termios;
 151
 152     /* Allocate instance and initialize some members */
 153     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 154     if( p_vout->p_sys == NULL )
 155     {
 156         msg_Err( p_vout, "out of memory" );
 157         return VLC_ENOMEM;
 158     };
 159     memset( p_sys, 0, sizeof(vout_sys_t) );
 160
 161     p_vout->pf_init = Init;
 162     p_vout->pf_end = End;
 163     p_vout->pf_manage = Manage;
 164     p_vout->pf_render = NULL;
 165     p_vout->pf_display = Display;
 166
 167     /* Set tty and fb devices */
 168     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 169     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 170 #ifndef WIN32
 171 #if defined(HAVE_ISATTY)
 172     /* Check that stdin is a TTY */
 173     if( !p_sys->b_tty && !isatty( 0 ) )
 174     {
 175         msg_Warn( p_vout, "fd 0 is not a TTY" );
 176         return VLC_EGENERIC;
 177     }
 178     else
 179     {
 180         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 181                           "there is no way to return to the tty." );
 182     }
 183 #endif
 184 #endif
 185
 186     psz_chroma = var_CreateGetNonEmptyString( p_vout, "fb-chroma" );
 187     if( psz_chroma )
 188     {
 189         if( strlen( psz_chroma ) == 4 )
 190         {
 191             p_sys->i_chroma = VLC_FOURCC( psz_chroma[0],
 192                                    psz_chroma[1],
 193                                    psz_chroma[2],
 194                                    psz_chroma[3] );
 195             msg_Dbg( p_vout, "forcing chroma '%s'", psz_chroma );
 196         }
 197         else
 198         {
 199             msg_Warn( p_vout, "invalid chroma (%s), using defaults.",
 200                       psz_chroma );
 201         }
 202         free( psz_chroma );
 203         psz_chroma = NULL;
 204     }
 205
 206     p_sys->i_aspect = -1;
 207     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 208     if( psz_aspect )
 209     {
 210         char *psz_parser = strchr( psz_aspect, ':' );
 211
 212         if( psz_parser )
 213         {
 214             *psz_parser++ = '\0';
 215             p_sys->i_aspect = ( atoi( psz_aspect )
 216                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 217         }
 218         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 219                   atoi( psz_aspect ), atoi( psz_parser ) );
 220
 221         free( psz_aspect );
 222         psz_aspect = NULL;
 223     }
 224
 225     /* tty handling */
 226     if( p_sys->b_tty )
 227     {
 228         GfxMode( p_sys->i_tty );
 229
 230         /* Set keyboard settings */
 231         if( tcgetattr(0, &p_vout->p_sys->old_termios) == -1 )
 232         {
 233             msg_Err( p_vout, "tcgetattr failed" );
 234         }
 235
 236         if( tcgetattr(0, &new_termios) == -1 )
 237         {
 238             msg_Err( p_vout, "tcgetattr failed" );
 239         }
 240
 241         /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 242         new_termios.c_lflag |= (ECHO | ECHOCTL); */
 243         new_termios.c_lflag &= ~ (ICANON);
 244         new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 245         new_termios.c_iflag = 0;
 246         new_termios.c_cc[VMIN] = 1;
 247         new_termios.c_cc[VTIME] = 0;
 248
 249         if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 250         {
 251             msg_Err( p_vout, "tcsetattr failed" );
 252         }
 253
 254         ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 255
 256         /* Set-up tty signal handler to be aware of tty changes */
 257         memset( &sig_tty, 0, sizeof( sig_tty ) );
 258         sig_tty.sa_handler = SwitchDisplay;
 259         sigemptyset( &sig_tty.sa_mask );
 260         if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 261             sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 262         {
 263             msg_Err( p_vout, "cannot set signal handler (%m)" );
 264             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 265             TextMode( p_sys->i_tty );
 266             free( p_vout->p_sys );
 267             return VLC_EGENERIC;
 268         }
 269
 270         /* Set-up tty according to new signal handler */
 271         if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 272         {
 273             msg_Err( p_vout, "cannot get terminal mode (%m)" );
 274             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 275             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 276             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 277             TextMode( p_sys->i_tty );
 278             free( p_vout->p_sys );
 279             return VLC_EGENERIC;
 280         }
 281         memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 282         vt_mode.mode   = VT_PROCESS;
 283         vt_mode.waitv  = 0;
 284         vt_mode.relsig = SIGUSR1;
 285         vt_mode.acqsig = SIGUSR2;
 286
 287         if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 288         {
 289             msg_Err( p_vout, "cannot set terminal mode (%m)" );
 290             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 291             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 292             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 293             TextMode( p_sys->i_tty );
 294             free( p_vout->p_sys );
 295             return VLC_EGENERIC;
 296         }
 297     }
 298
 299     if( OpenDisplay( p_vout ) )
 300     {
 301         if( p_sys->b_tty )
 302         {
 303             ioctl( p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 304             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 305             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 306             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 307             TextMode( p_sys->i_tty );
 308         }
 309         free( p_vout->p_sys );
 310         return VLC_EGENERIC;
 311     }
 312
 313     return VLC_SUCCESS;
 314 }
 315
 316 /*****************************************************************************
 317  * Init: initialize framebuffer video thread output method
 318  *****************************************************************************/
 319 static int Init( vout_thread_t *p_vout )
 320 {
 321     vout_sys_t *p_sys = p_vout->p_sys;
 322     int i_index;
 323     picture_t *p_pic;
 324
 325     I_OUTPUTPICTURES = 0;
 326
 327     if( p_sys->i_chroma == 0 )
 328     {
 329         /* Initialize the output structure: RGB with square pixels, whatever
 330          * the input format is, since it's the only format we know */
 331         switch( p_sys->var_info.bits_per_pixel )
 332         {
 333         case 8: /* FIXME: set the palette */
 334             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 335         case 15:
 336             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 337         case 16:
 338             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 339         case 24:
 340             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 341         case 32:
 342             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 343         default:
 344             msg_Err( p_vout, "unknown screen depth %i",
 345                      p_vout->p_sys->var_info.bits_per_pixel );
 346             return VLC_EGENERIC;
 347         }
 348
 349         if( p_sys->var_info.bits_per_pixel != 8 )
 350         {
 351             p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 352                                  << p_sys->var_info.red.offset;
 353             p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 354                                  << p_sys->var_info.green.offset;
 355             p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 356                                  << p_sys->var_info.blue.offset;
 357         }
 358     }
 359     else
 360     {
 361         p_vout->output.i_chroma = p_sys->i_chroma;
 362     }
 363     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 364
 365     p_vout->output.i_width  = p_vout->render.i_width  = p_sys->i_width;
 366     p_vout->output.i_height = p_vout->render.i_height = p_sys->i_height;
 367
 368     /* Assume we have square pixels */
 369     if( p_sys->i_aspect < 0 )
 370     {
 371         p_vout->output.i_aspect = ( p_sys->i_width
 372                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 373     }
 374     else p_vout->output.i_aspect = p_sys->i_aspect;
 375
 376     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 377     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 378
 379     /* Clear the screen */
 380     memset( p_sys->p_video, 0, p_sys->i_page_size );
 381
 382     /* Try to initialize 1 direct buffer */
 383     p_pic = NULL;
 384
 385     /* Find an empty picture slot */
 386     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 387     {
 388         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 389         {
 390             p_pic = p_vout->p_picture + i_index;
 391             break;
 392         }
 393     }
 394
 395     /* Allocate the picture */
 396     if( p_pic == NULL )
 397     {
 398         return VLC_EGENERIC;
 399     }
 400
 401     /* We know the chroma, allocate a buffer which will be used
 402      * directly by the decoder */
 403     p_pic->p->p_pixels = p_vout->p_sys->p_video;
 404     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 405     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 406     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 407
 408     if( p_vout->p_sys->var_info.xres_virtual )
 409     {
 410         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 411                              * p_vout->p_sys->i_bytes_per_pixel;
 412     }
 413     else
 414     {
 415         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 416                              * p_vout->p_sys->i_bytes_per_pixel;
 417     }
 418
 419     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 420                                  * p_vout->p_sys->i_bytes_per_pixel;
 421
 422     p_pic->i_planes = 1;
 423
 424     p_pic->i_status = DESTROYED_PICTURE;
 425     p_pic->i_type   = DIRECT_PICTURE;
 426
 427     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 428
 429     I_OUTPUTPICTURES++;
 430
 431     return VLC_SUCCESS;
 432 }
 433
 434 /*****************************************************************************
 435  * End: terminate framebuffer video thread output method
 436  *****************************************************************************/
 437 static void End( vout_thread_t *p_vout )
 438 {
 439     /* Clear the screen */
 440     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 441 }
 442
 443 /*****************************************************************************
 444  * Destroy: destroy FB video thread output method
 445  *****************************************************************************
 446  * Terminate an output method created by Create
 447  *****************************************************************************/
 448 static void Destroy( vlc_object_t *p_this )
 449 {
 450     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 451
 452     CloseDisplay( p_vout );
 453
 454     if( p_vout->p_sys->b_tty )
 455     {
 456         /* Reset the terminal */
 457         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 458
 459         /* Remove signal handlers */
 460         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 461         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 462
 463         /* Reset the keyboard state */
 464         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 465
 466         /* Return to text mode */
 467         TextMode( p_vout->p_sys->i_tty );
 468     }
 469
 470     /* Destroy structure */
 471     free( p_vout->p_sys );
 472 }
 473
 474 /*****************************************************************************
 475  * Manage: handle FB events
 476  *****************************************************************************
 477  * This function should be called regularly by video output thread. It manages
 478  * console events. It returns a non null value on error.
 479  *****************************************************************************/
 480 static int Manage( vout_thread_t *p_vout )
 481 {
 482 #if 0
 483     uint8_t buf;
 484
 485     if ( read(0, &buf, 1) == 1)
 486     {
 487         switch( buf )
 488         {
 489         case 'q':
 490             vlc_object_kill( p_vout->p_libvlc );
 491             break;
 492
 493         default:
 494             break;
 495         }
 496     }
 497 #endif
 498
 499     /*
 500      * Size change
 501      */
 502     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 503     {
 504         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 505         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 506
 507         /* Destroy XImages to change their size */
 508         End( p_vout );
 509
 510         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 511         if( Init( p_vout ) )
 512         {
 513             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 514             return VLC_EGENERIC;
 515         }
 516
 517         /* Clear screen */
 518         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 519
 520 #if 0
 521         /* Tell the video output thread that it will need to rebuild YUV
 522          * tables. This is needed since conversion buffer size may have changed */
 523         p_vout->i_changes |= VOUT_YUV_CHANGE;
 524 #endif
 525     }
 526
 527     return VLC_SUCCESS;
 528 }
 529
 530 /*****************************************************************************
 531  * Display: displays previously rendered output
 532  *****************************************************************************
 533  * This function send the currently rendered image to FB image, waits until
 534  * it is displayed and switch the two rendering buffers, preparing next frame.
 535  *****************************************************************************/
 536 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 537 {
 538 static int panned=0;
 539     /* swap the two Y offsets if the drivers supports panning */
 540     if( p_vout->p_sys->b_pan )
 541     {
 542         p_vout->p_sys->var_info.yoffset = 0;
 543         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 544
 545         /* the X offset should be 0, but who knows ...
 546          * some other app might have played with the framebuffer */
 547         p_vout->p_sys->var_info.xoffset = 0;
 548
 549         if( panned < 0 )
 550         {
 551                 ioctl( p_vout->p_sys->i_fd,
 552                        FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 553                 panned++;
 554         }
 555     }
 556 }
 557
 558 #if 0
 559 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 560                                                uint16_t *blue, uint16_t *transp )
 561 {
 562     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 563
 564     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 565 }
 566 #endif
 567
 568 /* following functions are local */
 569
 570 /*****************************************************************************
 571  * OpenDisplay: initialize framebuffer
 572  *****************************************************************************/
 573 static int OpenDisplay( vout_thread_t *p_vout )
 574 {
 575     char *psz_device;                             /* framebuffer device path */
 576     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 577
 578     /* Open framebuffer device */
 579     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 580     {
 581         msg_Err( p_vout, "don't know which fb device to open" );
 582         return VLC_EGENERIC;
 583     }
 584
 585     p_vout->p_sys->i_fd = open( psz_device, O_RDWR);
 586     if( p_vout->p_sys->i_fd == -1 )
 587     {
 588         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 589         free( psz_device );
 590         return VLC_EGENERIC;
 591     }
 592     free( psz_device );
 593     psz_device = NULL;
 594
 595     /* Get framebuffer device information */
 596     if( ioctl( p_vout->p_sys->i_fd,
 597                FBIOGET_VSCREENINFO, &p_vout->p_sys->var_info ) )
 598     {
 599         msg_Err( p_vout, "cannot get fb info (%m)" );
 600         close( p_vout->p_sys->i_fd );
 601         return VLC_EGENERIC;
 602     }
 603
 604     memcpy( &p_vout->p_sys->old_info, &p_vout->p_sys->var_info,
 605             sizeof( struct fb_var_screeninfo ) );
 606
 607     /* Set some attributes */
 608     p_vout->p_sys->var_info.activate = FB_ACTIVATE_NXTOPEN;
 609     p_vout->p_sys->var_info.xoffset =  0;
 610     p_vout->p_sys->var_info.yoffset =  0;
 611
 612     if( ioctl( p_vout->p_sys->i_fd,
 613                FBIOPUT_VSCREENINFO, &p_vout->p_sys->var_info ) )
 614     {
 615         msg_Err( p_vout, "cannot set fb info (%m)" );
 616         close( p_vout->p_sys->i_fd );
 617         return VLC_EGENERIC;
 618     }
 619
 620     /* Get some information again, in the definitive configuration */
 621     if( ioctl( p_vout->p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 622          || ioctl( p_vout->p_sys->i_fd,
 623                    FBIOGET_VSCREENINFO, &p_vout->p_sys->var_info ) )
 624     {
 625         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 626
 627         /* Restore fb config */
 628         ioctl( p_vout->p_sys->i_fd,
 629                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 630
 631         close( p_vout->p_sys->i_fd );
 632         return VLC_EGENERIC;
 633     }
 634
 635     /* FIXME: if the image is full-size, it gets cropped on the left
 636      * because of the xres / xres_virtual slight difference */
 637     msg_Dbg( p_vout, "%ix%i (virtual %ix%i)",
 638              p_vout->p_sys->var_info.xres, p_vout->p_sys->var_info.yres,
 639              p_vout->p_sys->var_info.xres_virtual,
 640              p_vout->p_sys->var_info.yres_virtual );
 641
 642     p_vout->p_sys->i_height = p_vout->p_sys->var_info.yres;
 643     p_vout->p_sys->i_width  = p_vout->p_sys->var_info.xres_virtual
 644                                ? p_vout->p_sys->var_info.xres_virtual
 645                                : p_vout->p_sys->var_info.xres;
 646
 647     p_vout->p_sys->p_palette = NULL;
 648     p_vout->p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 649
 650     switch( p_vout->p_sys->var_info.bits_per_pixel )
 651     {
 652     case 8:
 653         p_vout->p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 654         if( !p_vout->p_sys->p_palette )
 655         {
 656             msg_Err( p_vout, "out of memory" );
 657
 658             /* Restore fb config */
 659             ioctl( p_vout->p_sys->i_fd,
 660                    FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 661
 662             close( p_vout->p_sys->i_fd );
 663             return VLC_ENOMEM;
 664         }
 665         p_vout->p_sys->fb_cmap.start = 0;
 666         p_vout->p_sys->fb_cmap.len = 256;
 667         p_vout->p_sys->fb_cmap.red = p_vout->p_sys->p_palette;
 668         p_vout->p_sys->fb_cmap.green = p_vout->p_sys->p_palette + 256 * sizeof( uint16_t );
 669         p_vout->p_sys->fb_cmap.blue = p_vout->p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 670         p_vout->p_sys->fb_cmap.transp = p_vout->p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 671
 672         /* Save the colormap */
 673         ioctl( p_vout->p_sys->i_fd, FBIOGETCMAP, &p_vout->p_sys->fb_cmap );
 674
 675         p_vout->p_sys->i_bytes_per_pixel = 1;
 676         break;
 677
 678     case 15:
 679     case 16:
 680         p_vout->p_sys->i_bytes_per_pixel = 2;
 681         break;
 682
 683     case 24:
 684         p_vout->p_sys->i_bytes_per_pixel = 3;
 685         break;
 686
 687     case 32:
 688         p_vout->p_sys->i_bytes_per_pixel = 4;
 689         break;
 690
 691     default:
 692         msg_Err( p_vout, "screen depth %d is not supported",
 693                          p_vout->p_sys->var_info.bits_per_pixel );
 694
 695         /* Restore fb config */
 696         ioctl( p_vout->p_sys->i_fd,
 697                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 698
 699         close( p_vout->p_sys->i_fd );
 700         return VLC_EGENERIC;
 701     }
 702
 703     p_vout->p_sys->i_page_size = p_vout->p_sys->i_width *
 704                 p_vout->p_sys->i_height * p_vout->p_sys->i_bytes_per_pixel;
 705
 706     /* Map a framebuffer at the beginning */
 707     p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->i_page_size,
 708                                    PROT_READ | PROT_WRITE, MAP_SHARED,
 709                                    p_vout->p_sys->i_fd, 0 );
 710
 711     if( p_vout->p_sys->p_video == ((void*)-1) )
 712     {
 713         msg_Err( p_vout, "cannot map video memory (%m)" );
 714
 715         if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 716         {
 717             free( p_vout->p_sys->p_palette );
 718             p_vout->p_sys->p_palette = NULL;
 719         }
 720
 721         /* Restore fb config */
 722         ioctl( p_vout->p_sys->i_fd,
 723                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 724
 725         close( p_vout->p_sys->i_fd );
 726         return VLC_EGENERIC;
 727     }
 728
 729     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 730              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 731              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 732     return VLC_SUCCESS;
 733 }
 734
 735 /*****************************************************************************
 736  * CloseDisplay: terminate FB video thread output method
 737  *****************************************************************************/
 738 static void CloseDisplay( vout_thread_t *p_vout )
 739 {
 740     /* Clear display */
 741     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 742
 743     /* Restore palette */
 744     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 745     {
 746         ioctl( p_vout->p_sys->i_fd,
 747                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 748         free( p_vout->p_sys->p_palette );
 749         p_vout->p_sys->p_palette = NULL;
 750     }
 751
 752     /* Restore fb config */
 753     ioctl( p_vout->p_sys->i_fd,
 754            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 755
 756     /* Close fb */
 757     close( p_vout->p_sys->i_fd );
 758 }
 759
 760 /*****************************************************************************
 761  * SwitchDisplay: VT change signal handler
 762  *****************************************************************************
 763  * This function activates or deactivates the output of the thread. It is
 764  * called by the VT driver, on terminal change.
 765  *****************************************************************************/
 766 static void SwitchDisplay(int i_signal)
 767 {
 768 #if 0
 769     vout_thread_t *p_vout;
 770
 771     vlc_mutex_lock( &p_vout_bank->lock );
 772
 773     /* XXX: only test the first video output */
 774     if( p_vout_bank->i_count )
 775     {
 776         p_vout = p_vout_bank->pp_vout[0];
 777
 778         switch( i_signal )
 779         {
 780         case SIGUSR1:                                /* vt has been released */
 781             p_vout->b_active = 0;
 782             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 783             break;
 784         case SIGUSR2:                                /* vt has been acquired */
 785             p_vout->b_active = 1;
 786             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 787             /* handle blanking */
 788             vlc_mutex_lock( &p_vout->change_lock );
 789             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 790             vlc_mutex_unlock( &p_vout->change_lock );
 791             break;
 792         }
 793     }
 794
 795     vlc_mutex_unlock( &p_vout_bank->lock );
 796 #endif
 797 }
 798
 799 /*****************************************************************************
 800  * TextMode and GfxMode : switch tty to text/graphic mode
 801  *****************************************************************************
 802  * These functions toggle the tty mode.
 803  *****************************************************************************/
 804 static void TextMode( int i_tty )
 805 {
 806     /* return to text mode */
 807     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
 808     {
 809         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
 810     }
 811 }
 812
 813 static void GfxMode( int i_tty )
 814 {
 815     /* switch to graphic mode */
 816     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
 817     {
 818         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
 819     }
 820 }