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 VideoLAN
   5  * $Id: fb.c,v 1.6 2003/04/20 21:15:31 sam Exp $
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <errno.h>                                                 /* ENOMEM */
  28 #include <signal.h>                                      /* SIGUSR1, SIGUSR2 */
  29 #include <stdlib.h>                                                /* free() */
  30 #include <string.h>                                            /* strerror() */
  31 #include <fcntl.h>                                                 /* open() */
  32 #include <unistd.h>                                               /* close() */
  33
  34 #include <termios.h>                                       /* struct termios */
  35 #include <sys/ioctl.h>
  36 #include <sys/mman.h>                                              /* mmap() */
  37
  38 #include <linux/fb.h>
  39 #include <linux/vt.h>                                                /* VT_* */
  40 #include <linux/kd.h>                                                 /* KD* */
  41
  42 #include <vlc/vlc.h>
  43 #include <vlc/vout.h>
  44
  45 /*****************************************************************************
  46  * Local prototypes
  47  *****************************************************************************/
  48 static int  Create    ( vlc_object_t * );
  49 static void Destroy   ( vlc_object_t * );
  50
  51 static int  Init      ( vout_thread_t * );
  52 static void End       ( vout_thread_t * );
  53 static int  Manage    ( vout_thread_t * );
  54 static void Display   ( vout_thread_t *, picture_t * );
  55
  56 static int  OpenDisplay    ( vout_thread_t * );
  57 static void CloseDisplay   ( vout_thread_t * );
  58 static void SwitchDisplay  ( int i_signal );
  59 static void TextMode       ( int i_tty );
  60 static void GfxMode        ( int i_tty );
  61
  62 /*****************************************************************************
  63  * Module descriptor
  64  *****************************************************************************/
  65 #define FB_DEV_VAR "fbdev"
  66
  67 vlc_module_begin();
  68     add_category_hint( N_("Frame Buffer"), NULL, VLC_FALSE );
  69     add_file( FB_DEV_VAR, "/dev/fb0", NULL, N_("framebuffer device"), NULL, VLC_FALSE );
  70     set_description( _("Linux console framebuffer video output") );
  71     set_capability( "video output", 30 );
  72     set_callbacks( Create, Destroy );
  73 vlc_module_end();
  74
  75 /*****************************************************************************
  76  * vout_sys_t: video output framebuffer method descriptor
  77  *****************************************************************************
  78  * This structure is part of the video output thread descriptor.
  79  * It describes the FB specific properties of an output thread.
  80  *****************************************************************************/
  81 struct vout_sys_t
  82 {
  83     /* System informations */
  84     int                 i_tty;                          /* tty device handle */
  85     struct termios      old_termios;
  86
  87     /* Original configuration informations */
  88     struct sigaction            sig_usr1;           /* USR1 previous handler */
  89     struct sigaction            sig_usr2;           /* USR2 previous handler */
  90     struct vt_mode              vt_mode;                 /* previous VT mode */
  91
  92     /* Framebuffer information */
  93     int                         i_fd;                       /* device handle */
  94     struct fb_var_screeninfo    old_info;      /* original mode informations */
  95     struct fb_var_screeninfo    var_info;       /* current mode informations */
  96     vlc_bool_t                  b_pan;     /* does device supports panning ? */
  97     struct fb_cmap              fb_cmap;                /* original colormap */
  98     uint16_t                    *p_palette;              /* original palette */
  99
 100     /* Video information */
 101     int i_width;
 102     int i_height;
 103     int i_bytes_per_pixel;
 104
 105     /* Video memory */
 106     byte_t *    p_video;                                      /* base adress */
 107     size_t      i_page_size;                                    /* page size */
 108 };
 109
 110 /*****************************************************************************
 111  * Create: allocates FB video thread output method
 112  *****************************************************************************
 113  * This function allocates and initializes a FB vout method.
 114  *****************************************************************************/
 115 static int Create( vlc_object_t *p_this )
 116 {
 117     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 118
 119     struct sigaction    sig_tty;                 /* sigaction for tty change */
 120     struct vt_mode      vt_mode;                          /* vt current mode */
 121     struct termios      new_termios;
 122
 123     /* Allocate instance and initialize some members */
 124     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 125     if( p_vout->p_sys == NULL )
 126     {
 127         return VLC_ENOMEM;
 128     };
 129
 130     p_vout->pf_init = Init;
 131     p_vout->pf_end = End;
 132     p_vout->pf_manage = Manage;
 133     p_vout->pf_render = NULL;
 134     p_vout->pf_display = Display;
 135
 136     /* Set tty and fb devices */
 137     p_vout->p_sys->i_tty = 0;           /* 0 == /dev/tty0 == current console */
 138
 139     GfxMode( p_vout->p_sys->i_tty );
 140
 141     /* Set keyboard settings */
 142     if (tcgetattr(0, &p_vout->p_sys->old_termios) == -1)
 143     {
 144         msg_Err( p_vout, "tcgetattr failed" );
 145     }
 146
 147     if (tcgetattr(0, &new_termios) == -1)
 148     {
 149         msg_Err( p_vout, "tcgetattr failed" );
 150     }
 151
 152  /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 153     new_termios.c_lflag |= (ECHO | ECHOCTL); */
 154     new_termios.c_lflag &= ~ (ICANON);
 155     new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 156     new_termios.c_iflag = 0;
 157     new_termios.c_cc[VMIN] = 1;
 158     new_termios.c_cc[VTIME] = 0;
 159
 160     if (tcsetattr(0, TCSAFLUSH, &new_termios) == -1)
 161     {
 162         msg_Err( p_vout, "tcsetattr failed" );
 163     }
 164
 165     ioctl( p_vout->p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 166
 167     /* Set-up tty signal handler to be aware of tty changes */
 168     memset( &sig_tty, 0, sizeof( sig_tty ) );
 169     sig_tty.sa_handler = SwitchDisplay;
 170     sigemptyset( &sig_tty.sa_mask );
 171     if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 172         sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 173     {
 174         msg_Err( p_vout, "cannot set signal handler (%s)", strerror(errno) );
 175         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 176         TextMode( p_vout->p_sys->i_tty );
 177         free( p_vout->p_sys );
 178         return VLC_EGENERIC;
 179     }
 180
 181     /* Set-up tty according to new signal handler */
 182     if( -1 == ioctl( p_vout->p_sys->i_tty,
 183                      VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 184     {
 185         msg_Err( p_vout, "cannot get terminal mode (%s)", strerror(errno) );
 186         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 187         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 188         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 189         TextMode( p_vout->p_sys->i_tty );
 190         free( p_vout->p_sys );
 191         return VLC_EGENERIC;
 192     }
 193     memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 194     vt_mode.mode   = VT_PROCESS;
 195     vt_mode.waitv  = 0;
 196     vt_mode.relsig = SIGUSR1;
 197     vt_mode.acqsig = SIGUSR2;
 198
 199     if( -1 == ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 200     {
 201         msg_Err( p_vout, "cannot set terminal mode (%s)", strerror(errno) );
 202         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 203         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 204         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 205         TextMode( p_vout->p_sys->i_tty );
 206         free( p_vout->p_sys );
 207         return VLC_EGENERIC;
 208     }
 209
 210     if( OpenDisplay( p_vout ) )
 211     {
 212         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 213         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 214         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 215         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 216         TextMode( p_vout->p_sys->i_tty );
 217         free( p_vout->p_sys );
 218         return VLC_EGENERIC;
 219     }
 220
 221     return VLC_SUCCESS;
 222 }
 223
 224 /*****************************************************************************
 225  * Init: initialize framebuffer video thread output method
 226  *****************************************************************************/
 227 static int Init( vout_thread_t *p_vout )
 228 {
 229     int i_index;
 230     picture_t *p_pic;
 231
 232     I_OUTPUTPICTURES = 0;
 233
 234     /* Initialize the output structure: RGB with square pixels, whatever
 235      * the input format is, since it's the only format we know */
 236     switch( p_vout->p_sys->var_info.bits_per_pixel )
 237     {
 238         case 8: /* FIXME: set the palette */
 239             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 240         case 15:
 241             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 242         case 16:
 243             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 244         case 24:
 245             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 246         case 32:
 247             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 248         default:
 249             msg_Err( p_vout, "unknown screen depth %i",
 250                      p_vout->p_sys->var_info.bits_per_pixel );
 251             return VLC_EGENERIC;
 252     }
 253
 254     /* Only useful for p_vout->p_sys->var_info.bits_per_pixel != 8 */
 255     p_vout->output.i_rmask = ( (1 << p_vout->p_sys->var_info.red.length) - 1 )
 256                      << p_vout->p_sys->var_info.red.offset;
 257     p_vout->output.i_gmask = ( (1 << p_vout->p_sys->var_info.green.length) - 1 )
 258                      << p_vout->p_sys->var_info.green.offset;
 259     p_vout->output.i_bmask = ( (1 << p_vout->p_sys->var_info.blue.length) - 1 )
 260                      << p_vout->p_sys->var_info.blue.offset;
 261
 262     p_vout->output.i_width = p_vout->p_sys->i_width;
 263     p_vout->output.i_height = p_vout->p_sys->i_height;
 264
 265     /* Assume we have square pixels */
 266     p_vout->output.i_aspect = p_vout->p_sys->i_width
 267                                * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 268
 269     /* Clear the screen */
 270     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 271
 272     /* Try to initialize 1 direct buffer */
 273     p_pic = NULL;
 274
 275     /* Find an empty picture slot */
 276     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 277     {
 278         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 279         {
 280             p_pic = p_vout->p_picture + i_index;
 281             break;
 282         }
 283     }
 284
 285     /* Allocate the picture */
 286     if( p_pic == NULL )
 287     {
 288         return VLC_EGENERIC;
 289     }
 290
 291     /* We know the chroma, allocate a buffer which will be used
 292      * directly by the decoder */
 293     p_pic->p->p_pixels = p_vout->p_sys->p_video;
 294     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 295     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 296
 297     if( p_vout->p_sys->var_info.xres_virtual )
 298     {
 299         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 300                              * p_vout->p_sys->i_bytes_per_pixel;
 301     }
 302     else
 303     {
 304         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 305                              * p_vout->p_sys->i_bytes_per_pixel;
 306     }
 307
 308     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 309                                  * p_vout->p_sys->i_bytes_per_pixel;
 310
 311     p_pic->i_planes = 1;
 312
 313     p_pic->i_status = DESTROYED_PICTURE;
 314     p_pic->i_type   = DIRECT_PICTURE;
 315
 316     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 317
 318     I_OUTPUTPICTURES++;
 319
 320     return VLC_SUCCESS;
 321 }
 322
 323 /*****************************************************************************
 324  * End: terminate framebuffer video thread output method
 325  *****************************************************************************/
 326 static void End( vout_thread_t *p_vout )
 327 {
 328     /* Clear the screen */
 329     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 330 }
 331
 332 /*****************************************************************************
 333  * Destroy: destroy FB video thread output method
 334  *****************************************************************************
 335  * Terminate an output method created by Create
 336  *****************************************************************************/
 337 static void Destroy( vlc_object_t *p_this )
 338 {
 339     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 340
 341     CloseDisplay( p_vout );
 342
 343     /* Reset the terminal */
 344     ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 345
 346     /* Remove signal handlers */
 347     sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 348     sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 349
 350     /* Reset the keyboard state */
 351     tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 352
 353     /* Return to text mode */
 354     TextMode( p_vout->p_sys->i_tty );
 355
 356     /* Destroy structure */
 357     free( p_vout->p_sys );
 358 }
 359
 360 /*****************************************************************************
 361  * Manage: handle FB events
 362  *****************************************************************************
 363  * This function should be called regularly by video output thread. It manages
 364  * console events. It returns a non null value on error.
 365  *****************************************************************************/
 366 static int Manage( vout_thread_t *p_vout )
 367 {
 368 #if 0
 369     u8 buf;
 370
 371     if ( read(0, &buf, 1) == 1)
 372     {
 373         switch( buf )
 374         {
 375         case 'q':
 376             p_vout->p_vlc->b_die = 1;
 377             break;
 378
 379         default:
 380             break;
 381         }
 382     }
 383 #endif
 384
 385     /*
 386      * Size change
 387      */
 388     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 389     {
 390         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 391         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 392
 393         /* Destroy XImages to change their size */
 394         End( p_vout );
 395
 396         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 397         if( Init( p_vout ) )
 398         {
 399             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 400             return VLC_EGENERIC;
 401         }
 402
 403         /* Clear screen */
 404         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 405
 406 #if 0
 407         /* Tell the video output thread that it will need to rebuild YUV
 408          * tables. This is needed since conversion buffer size may have changed */
 409         p_vout->i_changes |= VOUT_YUV_CHANGE;
 410 #endif
 411     }
 412
 413     return VLC_SUCCESS;
 414 }
 415
 416 /*****************************************************************************
 417  * Display: displays previously rendered output
 418  *****************************************************************************
 419  * This function send the currently rendered image to FB image, waits until
 420  * it is displayed and switch the two rendering buffers, preparing next frame.
 421  *****************************************************************************/
 422 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 423 {
 424 static int panned=0;
 425     /* swap the two Y offsets if the drivers supports panning */
 426     if( p_vout->p_sys->b_pan )
 427     {
 428         p_vout->p_sys->var_info.yoffset = 0;
 429         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 430
 431         /* the X offset should be 0, but who knows ...
 432          * some other app might have played with the framebuffer */
 433         p_vout->p_sys->var_info.xoffset = 0;
 434
 435 if(panned < 0) {
 436         ioctl( p_vout->p_sys->i_fd,
 437                FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 438 panned++;
 439 }
 440     }
 441 }
 442
 443 #if 0
 444 static void SetPalette( vout_thread_t *p_vout,
 445                              u16 *red, u16 *green, u16 *blue, u16 *transp )
 446 {
 447     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 448
 449     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 450 }
 451 #endif
 452
 453 /* following functions are local */
 454
 455 /*****************************************************************************
 456  * OpenDisplay: initialize framebuffer
 457  *****************************************************************************/
 458 static int OpenDisplay( vout_thread_t *p_vout )
 459 {
 460     char *psz_device;                             /* framebuffer device path */
 461     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 462
 463     /* Open framebuffer device */
 464     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 465     {
 466         msg_Err( p_vout, "don't know which fb device to open" );
 467         return VLC_EGENERIC;
 468     }
 469
 470     p_vout->p_sys->i_fd = open( psz_device, O_RDWR);
 471
 472     if( p_vout->p_sys->i_fd == -1 )
 473     {
 474         msg_Err( p_vout, "cannot open %s (%s)", psz_device, strerror(errno) );
 475         free( psz_device );
 476         return VLC_EGENERIC;
 477     }
 478     free( psz_device );
 479
 480     /* Get framebuffer device informations */
 481     if( ioctl( p_vout->p_sys->i_fd,
 482                FBIOGET_VSCREENINFO, &p_vout->p_sys->var_info ) )
 483     {
 484         msg_Err( p_vout, "cannot get fb info (%s)", strerror(errno) );
 485         close( p_vout->p_sys->i_fd );
 486         return VLC_EGENERIC;
 487     }
 488
 489     memcpy( &p_vout->p_sys->old_info, &p_vout->p_sys->var_info,
 490             sizeof( struct fb_var_screeninfo ) );
 491
 492     /* Set some attributes */
 493     p_vout->p_sys->var_info.activate = FB_ACTIVATE_NXTOPEN;
 494     p_vout->p_sys->var_info.xoffset =  0;
 495     p_vout->p_sys->var_info.yoffset =  0;
 496
 497     if( ioctl( p_vout->p_sys->i_fd,
 498                FBIOPUT_VSCREENINFO, &p_vout->p_sys->var_info ) )
 499     {
 500         msg_Err( p_vout, "cannot set fb info (%s)", strerror(errno) );
 501         close( p_vout->p_sys->i_fd );
 502         return VLC_EGENERIC;
 503     }
 504
 505     /* Get some informations again, in the definitive configuration */
 506     if( ioctl( p_vout->p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 507          || ioctl( p_vout->p_sys->i_fd,
 508                    FBIOGET_VSCREENINFO, &p_vout->p_sys->var_info ) )
 509     {
 510         msg_Err( p_vout, "cannot get additional fb info (%s)",
 511                           strerror(errno) );
 512
 513         /* Restore fb config */
 514         ioctl( p_vout->p_sys->i_fd,
 515                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 516
 517         close( p_vout->p_sys->i_fd );
 518         return VLC_EGENERIC;
 519     }
 520
 521     /* FIXME: if the image is full-size, it gets cropped on the left
 522      * because of the xres / xres_virtual slight difference */
 523     msg_Dbg( p_vout, "%ix%i (virtual %ix%i)",
 524              p_vout->p_sys->var_info.xres, p_vout->p_sys->var_info.yres,
 525              p_vout->p_sys->var_info.xres_virtual,
 526              p_vout->p_sys->var_info.yres_virtual );
 527
 528     p_vout->p_sys->i_height = p_vout->p_sys->var_info.yres;
 529     p_vout->p_sys->i_width  = p_vout->p_sys->var_info.xres_virtual
 530                                ? p_vout->p_sys->var_info.xres_virtual
 531                                : p_vout->p_sys->var_info.xres;
 532
 533     p_vout->p_sys->p_palette = NULL;
 534     p_vout->p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 535
 536     switch( p_vout->p_sys->var_info.bits_per_pixel )
 537     {
 538     case 8:
 539         p_vout->p_sys->p_palette = malloc( 8 * 256 * sizeof( u16 ) );
 540         p_vout->p_sys->fb_cmap.start = 0;
 541         p_vout->p_sys->fb_cmap.len = 256;
 542         p_vout->p_sys->fb_cmap.red = p_vout->p_sys->p_palette;
 543         p_vout->p_sys->fb_cmap.green = p_vout->p_sys->p_palette + 256 * sizeof( u16 );
 544         p_vout->p_sys->fb_cmap.blue = p_vout->p_sys->p_palette + 2 * 256 * sizeof( u16 );
 545         p_vout->p_sys->fb_cmap.transp = p_vout->p_sys->p_palette + 3 * 256 * sizeof( u16 );
 546
 547         /* Save the colormap */
 548         ioctl( p_vout->p_sys->i_fd, FBIOGETCMAP, &p_vout->p_sys->fb_cmap );
 549
 550         p_vout->p_sys->i_bytes_per_pixel = 1;
 551         break;
 552
 553     case 15:
 554     case 16:
 555         p_vout->p_sys->i_bytes_per_pixel = 2;
 556         break;
 557
 558     case 24:
 559         p_vout->p_sys->i_bytes_per_pixel = 3;
 560         break;
 561
 562     case 32:
 563         p_vout->p_sys->i_bytes_per_pixel = 4;
 564         break;
 565
 566     default:
 567         msg_Err( p_vout, "screen depth %d is not supported",
 568                          p_vout->p_sys->var_info.bits_per_pixel );
 569
 570         /* Restore fb config */
 571         ioctl( p_vout->p_sys->i_fd,
 572                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 573
 574         close( p_vout->p_sys->i_fd );
 575         return VLC_EGENERIC;
 576     }
 577
 578     p_vout->p_sys->i_page_size = p_vout->p_sys->i_width *
 579                 p_vout->p_sys->i_height * p_vout->p_sys->i_bytes_per_pixel;
 580
 581     /* Map a framebuffer at the beginning */
 582     p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->i_page_size,
 583                                    PROT_READ | PROT_WRITE, MAP_SHARED,
 584                                    p_vout->p_sys->i_fd, 0 );
 585
 586     if( p_vout->p_sys->p_video == ((void*)-1) )
 587     {
 588         msg_Err( p_vout, "cannot map video memory (%s)", strerror(errno) );
 589
 590         if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 591         {
 592             free( p_vout->p_sys->p_palette );
 593         }
 594
 595         /* Restore fb config */
 596         ioctl( p_vout->p_sys->i_fd,
 597                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 598
 599         close( p_vout->p_sys->i_fd );
 600         return VLC_EGENERIC;
 601     }
 602
 603     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 604              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 605              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 606     return VLC_SUCCESS;
 607 }
 608
 609 /*****************************************************************************
 610  * CloseDisplay: terminate FB video thread output method
 611  *****************************************************************************/
 612 static void CloseDisplay( vout_thread_t *p_vout )
 613 {
 614     /* Clear display */
 615     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 616
 617     /* Restore palette */
 618     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 619     {
 620         ioctl( p_vout->p_sys->i_fd,
 621                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 622         free( p_vout->p_sys->p_palette );
 623     }
 624
 625     /* Restore fb config */
 626     ioctl( p_vout->p_sys->i_fd,
 627            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 628
 629     /* Close fb */
 630     close( p_vout->p_sys->i_fd );
 631 }
 632
 633 /*****************************************************************************
 634  * SwitchDisplay: VT change signal handler
 635  *****************************************************************************
 636  * This function activates or deactivates the output of the thread. It is
 637  * called by the VT driver, on terminal change.
 638  *****************************************************************************/
 639 static void SwitchDisplay(int i_signal)
 640 {
 641 #if 0
 642     vout_thread_t *p_vout;
 643
 644     vlc_mutex_lock( &p_vout_bank->lock );
 645
 646     /* XXX: only test the first video output */
 647     if( p_vout_bank->i_count )
 648     {
 649         p_vout = p_vout_bank->pp_vout[0];
 650
 651         switch( i_signal )
 652         {
 653         case SIGUSR1:                                /* vt has been released */
 654             p_vout->b_active = 0;
 655             ioctl( p_vout->p_sys->i_tty, VT_RELDISP, 1 );
 656             break;
 657         case SIGUSR2:                                /* vt has been acquired */
 658             p_vout->b_active = 1;
 659             ioctl( p_vout->p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 660             /* handle blanking */
 661             vlc_mutex_lock( &p_vout->change_lock );
 662             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 663             vlc_mutex_unlock( &p_vout->change_lock );
 664             break;
 665         }
 666     }
 667
 668     vlc_mutex_unlock( &p_vout_bank->lock );
 669 #endif
 670 }
 671
 672 /*****************************************************************************
 673  * TextMode and GfxMode : switch tty to text/graphic mode
 674  *****************************************************************************
 675  * These functions toggle the tty mode.
 676  *****************************************************************************/
 677 static void TextMode( int i_tty )
 678 {
 679     /* return to text mode */
 680     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
 681     {
 682         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
 683     }
 684 }
 685
 686 static void GfxMode( int i_tty )
 687 {
 688     /* switch to graphic mode */
 689     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
 690     {
 691         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
 692     }
 693 }
 694