git.sesse.net Git - vlc/blob - plugins/fb/fb.c

   1 /*****************************************************************************
   2  * fb.c : framebuffer plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 VideoLAN
   5  * $Id: fb.c,v 1.21 2002/07/23 00:39:17 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  * Capabilities defined in the other files.
  47  *****************************************************************************/
  48 static void vout_getfunctions( function_list_t * p_function_list );
  49
  50 static int  vout_Create    ( vout_thread_t * );
  51 static void vout_Destroy   ( vout_thread_t * );
  52 static void vout_Render    ( vout_thread_t *, picture_t * );
  53 static void vout_Display   ( vout_thread_t *, picture_t * );
  54 static int  vout_Manage    ( vout_thread_t * );
  55 static int  vout_Init      ( vout_thread_t * );
  56 static void vout_End       ( vout_thread_t * );
  57
  58 static int  OpenDisplay    ( vout_thread_t * );
  59 static void CloseDisplay   ( vout_thread_t * );
  60 static void SwitchDisplay  ( int i_signal );
  61 static void TextMode       ( int i_tty );
  62 static void GfxMode        ( int i_tty );
  63
  64 /*****************************************************************************
  65  * Building configuration tree
  66  *****************************************************************************/
  67 #define FB_DEV_VAR "fbdev"
  68
  69 MODULE_CONFIG_START
  70 ADD_CATEGORY_HINT( N_("Miscellaneous"), NULL )
  71 ADD_STRING  ( FB_DEV_VAR, "/dev/fb0", NULL, N_("framebuffer device"), NULL )
  72 MODULE_CONFIG_STOP
  73
  74 MODULE_INIT_START
  75     SET_DESCRIPTION( _("Linux console framebuffer module") )
  76     ADD_CAPABILITY( VOUT, 30 )
  77 MODULE_INIT_STOP
  78
  79 MODULE_ACTIVATE_START
  80     vout_getfunctions( &p_module->p_functions->vout );
  81 MODULE_ACTIVATE_STOP
  82
  83 MODULE_DEACTIVATE_START
  84 MODULE_DEACTIVATE_STOP
  85
  86 /*****************************************************************************
  87  * vout_sys_t: video output framebuffer method descriptor
  88  *****************************************************************************
  89  * This structure is part of the video output thread descriptor.
  90  * It describes the FB specific properties of an output thread.
  91  *****************************************************************************/
  92 struct vout_sys_t
  93 {
  94     /* System informations */
  95     int                 i_tty;                          /* tty device handle */
  96     struct termios      old_termios;
  97
  98     /* Original configuration informations */
  99     struct sigaction            sig_usr1;           /* USR1 previous handler */
 100     struct sigaction            sig_usr2;           /* USR2 previous handler */
 101     struct vt_mode              vt_mode;                 /* previous VT mode */
 102
 103     /* Framebuffer information */
 104     int                         i_fd;                       /* device handle */
 105     struct fb_var_screeninfo    old_info;      /* original mode informations */
 106     struct fb_var_screeninfo    var_info;       /* current mode informations */
 107     vlc_bool_t                  b_pan;     /* does device supports panning ? */
 108     struct fb_cmap              fb_cmap;                /* original colormap */
 109     u16                         *p_palette;              /* original palette */
 110
 111     /* Video information */
 112     int i_width;
 113     int i_height;
 114     int i_bytes_per_pixel;
 115
 116     /* Video memory */
 117     byte_t *    p_video;                                      /* base adress */
 118     size_t      i_page_size;                                    /* page size */
 119 };
 120
 121 /*****************************************************************************
 122  * Functions exported as capabilities. They are declared as static so that
 123  * we don't pollute the namespace too much.
 124  *****************************************************************************/
 125 static void vout_getfunctions( function_list_t * p_function_list )
 126 {
 127     p_function_list->functions.vout.pf_create     = vout_Create;
 128     p_function_list->functions.vout.pf_init       = vout_Init;
 129     p_function_list->functions.vout.pf_end        = vout_End;
 130     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 131     p_function_list->functions.vout.pf_manage     = vout_Manage;
 132     p_function_list->functions.vout.pf_render     = vout_Render;
 133     p_function_list->functions.vout.pf_display    = vout_Display;
 134 }
 135
 136 /*****************************************************************************
 137  * vout_Create: allocates FB video thread output method
 138  *****************************************************************************
 139  * This function allocates and initializes a FB vout method.
 140  *****************************************************************************/
 141 static int vout_Create( vout_thread_t *p_vout )
 142 {
 143     struct sigaction    sig_tty;                 /* sigaction for tty change */
 144     struct vt_mode      vt_mode;                          /* vt current mode */
 145     struct termios      new_termios;
 146
 147     /* Allocate instance and initialize some members */
 148     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 149     if( p_vout->p_sys == NULL )
 150     {
 151         return( 1 );
 152     };
 153
 154     /* Set tty and fb devices */
 155     p_vout->p_sys->i_tty = 0;           /* 0 == /dev/tty0 == current console */
 156
 157     GfxMode( p_vout->p_sys->i_tty );
 158
 159     /* Set keyboard settings */
 160     if (tcgetattr(0, &p_vout->p_sys->old_termios) == -1)
 161     {
 162         msg_Err( p_vout, "tcgetattr failed" );
 163     }
 164
 165     if (tcgetattr(0, &new_termios) == -1)
 166     {
 167         msg_Err( p_vout, "tcgetattr failed" );
 168     }
 169
 170  /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 171     new_termios.c_lflag |= (ECHO | ECHOCTL); */
 172     new_termios.c_lflag &= ~ (ICANON);
 173     new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 174     new_termios.c_iflag = 0;
 175     new_termios.c_cc[VMIN] = 1;
 176     new_termios.c_cc[VTIME] = 0;
 177
 178     if (tcsetattr(0, TCSAFLUSH, &new_termios) == -1)
 179     {
 180         msg_Err( p_vout, "tcsetattr failed" );
 181     }
 182
 183     ioctl( p_vout->p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 184
 185     /* Set-up tty signal handler to be aware of tty changes */
 186     memset( &sig_tty, 0, sizeof( sig_tty ) );
 187     sig_tty.sa_handler = SwitchDisplay;
 188     sigemptyset( &sig_tty.sa_mask );
 189     if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 190         sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 191     {
 192         msg_Err( p_vout, "cannot set signal handler (%s)", strerror(errno) );
 193         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 194         TextMode( p_vout->p_sys->i_tty );
 195         free( p_vout->p_sys );
 196         return( 1 );
 197     }
 198
 199     /* Set-up tty according to new signal handler */
 200     if( -1 == ioctl( p_vout->p_sys->i_tty,
 201                      VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 202     {
 203         msg_Err( p_vout, "cannot get terminal mode (%s)", strerror(errno) );
 204         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 205         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 206         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 207         TextMode( p_vout->p_sys->i_tty );
 208         free( p_vout->p_sys );
 209         return( 1 );
 210     }
 211     memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 212     vt_mode.mode   = VT_PROCESS;
 213     vt_mode.waitv  = 0;
 214     vt_mode.relsig = SIGUSR1;
 215     vt_mode.acqsig = SIGUSR2;
 216
 217     if( -1 == ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 218     {
 219         msg_Err( p_vout, "cannot set terminal mode (%s)", strerror(errno) );
 220         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 221         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 222         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 223         TextMode( p_vout->p_sys->i_tty );
 224         free( p_vout->p_sys );
 225         return( 1 );
 226     }
 227
 228     if( OpenDisplay( p_vout ) )
 229     {
 230         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 231         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 232         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 233         tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 234         TextMode( p_vout->p_sys->i_tty );
 235         free( p_vout->p_sys );
 236         return( 1 );
 237     }
 238
 239     return( 0 );
 240 }
 241
 242 /*****************************************************************************
 243  * vout_Init: initialize framebuffer video thread output method
 244  *****************************************************************************/
 245 static int vout_Init( vout_thread_t *p_vout )
 246 {
 247     int i_index;
 248     picture_t *p_pic;
 249
 250     I_OUTPUTPICTURES = 0;
 251
 252     /* Initialize the output structure: RGB with square pixels, whatever
 253      * the input format is, since it's the only format we know */
 254     switch( p_vout->p_sys->var_info.bits_per_pixel )
 255     {
 256         case 8: /* FIXME: set the palette */
 257             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 258         case 15:
 259             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 260         case 16:
 261             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 262         case 24:
 263             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 264         case 32:
 265             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 266         default:
 267             msg_Err( p_vout, "unknown screen depth %i",
 268                      p_vout->p_sys->var_info.bits_per_pixel );
 269             return 0;
 270     }
 271
 272     /* Only useful for p_vout->p_sys->var_info.bits_per_pixel != 8 */
 273     p_vout->output.i_rmask = ( (1 << p_vout->p_sys->var_info.red.length) - 1 )
 274                      << p_vout->p_sys->var_info.red.offset;
 275     p_vout->output.i_gmask = ( (1 << p_vout->p_sys->var_info.green.length) - 1 )
 276                      << p_vout->p_sys->var_info.green.offset;
 277     p_vout->output.i_bmask = ( (1 << p_vout->p_sys->var_info.blue.length) - 1 )
 278                      << p_vout->p_sys->var_info.blue.offset;
 279
 280     p_vout->output.i_width = p_vout->p_sys->i_width;
 281     p_vout->output.i_height = p_vout->p_sys->i_height;
 282
 283     /* Assume we have square pixels */
 284     p_vout->output.i_aspect = p_vout->p_sys->i_width
 285                                * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 286
 287     /* Clear the screen */
 288     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 289
 290     /* Try to initialize 1 direct buffer */
 291     p_pic = NULL;
 292
 293     /* Find an empty picture slot */
 294     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 295     {
 296         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 297         {
 298             p_pic = p_vout->p_picture + i_index;
 299             break;
 300         }
 301     }
 302
 303     /* Allocate the picture */
 304     if( p_pic == NULL )
 305     {
 306         return 0;
 307     }
 308
 309     /* We know the chroma, allocate a buffer which will be used
 310      * directly by the decoder */
 311     p_pic->p->p_pixels = p_vout->p_sys->p_video;
 312     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 313     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 314
 315     if( p_vout->p_sys->var_info.xres_virtual )
 316     {
 317         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 318                              * p_vout->p_sys->i_bytes_per_pixel;
 319     }
 320     else
 321     {
 322         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 323                              * p_vout->p_sys->i_bytes_per_pixel;
 324     }
 325
 326     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 327                                  * p_vout->p_sys->i_bytes_per_pixel;
 328
 329     p_pic->i_planes = 1;
 330
 331     p_pic->i_status = DESTROYED_PICTURE;
 332     p_pic->i_type   = DIRECT_PICTURE;
 333
 334     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 335
 336     I_OUTPUTPICTURES++;
 337
 338     return 0;
 339 }
 340
 341 /*****************************************************************************
 342  * vout_End: terminate framebuffer video thread output method
 343  *****************************************************************************/
 344 static void vout_End( vout_thread_t *p_vout )
 345 {
 346     /* Clear the screen */
 347     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 348 }
 349
 350 /*****************************************************************************
 351  * vout_Destroy: destroy FB video thread output method
 352  *****************************************************************************
 353  * Terminate an output method created by vout_CreateOutputMethod
 354  *****************************************************************************/
 355 static void vout_Destroy( vout_thread_t *p_vout )
 356 {
 357     CloseDisplay( p_vout );
 358
 359     /* Reset the terminal */
 360     ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 361
 362     /* Remove signal handlers */
 363     sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 364     sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 365
 366     /* Reset the keyboard state */
 367     tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 368
 369     /* Return to text mode */
 370     TextMode( p_vout->p_sys->i_tty );
 371
 372     /* Destroy structure */
 373     free( p_vout->p_sys );
 374 }
 375
 376 /*****************************************************************************
 377  * vout_Manage: handle FB events
 378  *****************************************************************************
 379  * This function should be called regularly by video output thread. It manages
 380  * console events. It returns a non null value on error.
 381  *****************************************************************************/
 382 static int vout_Manage( vout_thread_t *p_vout )
 383 {
 384 #if 0
 385     u8 buf;
 386
 387     if ( read(0, &buf, 1) == 1)
 388     {
 389         switch( buf )
 390         {
 391         case 'q':
 392             p_vout->p_vlc->b_die = 1;
 393             break;
 394
 395         default:
 396             break;
 397         }
 398     }
 399 #endif
 400
 401     /*
 402      * Size change
 403      */
 404     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 405     {
 406         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 407         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 408
 409         /* Destroy XImages to change their size */
 410         vout_End( p_vout );
 411
 412         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 413         if( vout_Init( p_vout ) )
 414         {
 415             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 416             return( 1 );
 417         }
 418
 419         /* Clear screen */
 420         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 421
 422 #if 0
 423         /* Tell the video output thread that it will need to rebuild YUV
 424          * tables. This is needed since conversion buffer size may have changed */
 425         p_vout->i_changes |= VOUT_YUV_CHANGE;
 426 #endif
 427     }
 428
 429     return 0;
 430 }
 431
 432 /*****************************************************************************
 433  * vout_Render: renders previously calculated output
 434  *****************************************************************************/
 435 static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
 436 {
 437     ;
 438 }
 439
 440 /*****************************************************************************
 441  * vout_Display: displays previously rendered output
 442  *****************************************************************************
 443  * This function send the currently rendered image to FB image, waits until
 444  * it is displayed and switch the two rendering buffers, preparing next frame.
 445  *****************************************************************************/
 446 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 447 {
 448     /* swap the two Y offsets if the drivers supports panning */
 449     if( p_vout->p_sys->b_pan )
 450     {
 451         p_vout->p_sys->var_info.yoffset = 0;
 452         //p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres;
 453
 454         /* the X offset should be 0, but who knows ...
 455          * some other app might have played with the framebuffer */
 456         p_vout->p_sys->var_info.xoffset = 0;
 457
 458         ioctl( p_vout->p_sys->i_fd,
 459                FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 460     }
 461 }
 462
 463 #if 0
 464 static void vout_SetPalette( vout_thread_t *p_vout,
 465                              u16 *red, u16 *green, u16 *blue, u16 *transp )
 466 {
 467     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 468
 469     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 470 }
 471 #endif
 472
 473 /* following functions are local */
 474
 475 /*****************************************************************************
 476  * OpenDisplay: initialize framebuffer
 477  *****************************************************************************/
 478 static int OpenDisplay( vout_thread_t *p_vout )
 479 {
 480     char *psz_device;                             /* framebuffer device path */
 481     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 482
 483     /* Open framebuffer device */
 484     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 485     {
 486         msg_Err( p_vout, "don't know which fb device to open" );
 487         return( 1 );
 488     }
 489
 490     p_vout->p_sys->i_fd = open( psz_device, O_RDWR);
 491
 492     if( p_vout->p_sys->i_fd == -1 )
 493     {
 494         msg_Err( p_vout, "cannot open %s (%s)", psz_device, strerror(errno) );
 495         free( psz_device );
 496         return( 1 );
 497     }
 498     free( psz_device );
 499
 500     /* Get framebuffer device informations */
 501     if( ioctl( p_vout->p_sys->i_fd,
 502                FBIOGET_VSCREENINFO, &p_vout->p_sys->var_info ) )
 503     {
 504         msg_Err( p_vout, "cannot get fb info (%s)", strerror(errno) );
 505         close( p_vout->p_sys->i_fd );
 506         return( 1 );
 507     }
 508
 509     if( ioctl( p_vout->p_sys->i_fd,
 510                FBIOGET_VSCREENINFO, &p_vout->p_sys->old_info ) )
 511     {
 512         msg_Err( p_vout, "cannot get 2nd fb info (%s)", strerror(errno) );
 513         close( p_vout->p_sys->i_fd );
 514         return( 1 );
 515     }
 516
 517     /* Set some attributes */
 518     p_vout->p_sys->var_info.activate = FB_ACTIVATE_NXTOPEN;
 519     p_vout->p_sys->var_info.xoffset =  0;
 520     p_vout->p_sys->var_info.yoffset =  0;
 521
 522     if( ioctl( p_vout->p_sys->i_fd,
 523                FBIOPUT_VSCREENINFO, &p_vout->p_sys->var_info ) )
 524     {
 525         msg_Err( p_vout, "cannot set fb info (%s)", strerror(errno) );
 526         close( p_vout->p_sys->i_fd );
 527         return( 1 );
 528     }
 529
 530     /* Get some informations again, in the definitive configuration */
 531     if( ioctl( p_vout->p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 532          || ioctl( p_vout->p_sys->i_fd,
 533                    FBIOGET_VSCREENINFO, &p_vout->p_sys->var_info ) )
 534     {
 535         msg_Err( p_vout, "cannot get additional fb info (%s)",
 536                           strerror(errno) );
 537
 538         /* Restore fb config */
 539         ioctl( p_vout->p_sys->i_fd,
 540                FBIOPUT_VSCREENINFO, &p_vout->p_sys->var_info );
 541
 542         close( p_vout->p_sys->i_fd );
 543         return( 1 );
 544     }
 545
 546     /* FIXME: if the image is full-size, it gets cropped on the left
 547      * because of the xres / xres_virtual slight difference */
 548     msg_Dbg( p_vout, "%ix%i (virtual %ix%i)",
 549              p_vout->p_sys->var_info.xres, p_vout->p_sys->var_info.yres,
 550              p_vout->p_sys->var_info.xres_virtual,
 551              p_vout->p_sys->var_info.yres_virtual );
 552
 553     p_vout->p_sys->i_height = p_vout->p_sys->var_info.yres;
 554     p_vout->p_sys->i_width  = p_vout->p_sys->var_info.xres_virtual
 555                                ? p_vout->p_sys->var_info.xres_virtual
 556                                : p_vout->p_sys->var_info.xres;
 557
 558     p_vout->p_sys->p_palette = NULL;
 559     p_vout->p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 560
 561     switch( p_vout->p_sys->var_info.bits_per_pixel )
 562     {
 563     case 8:
 564         p_vout->p_sys->p_palette = malloc( 8 * 256 * sizeof( u16 ) );
 565         p_vout->p_sys->fb_cmap.start = 0;
 566         p_vout->p_sys->fb_cmap.len = 256;
 567         p_vout->p_sys->fb_cmap.red = p_vout->p_sys->p_palette;
 568         p_vout->p_sys->fb_cmap.green = p_vout->p_sys->p_palette + 256 * sizeof( u16 );
 569         p_vout->p_sys->fb_cmap.blue = p_vout->p_sys->p_palette + 2 * 256 * sizeof( u16 );
 570         p_vout->p_sys->fb_cmap.transp = p_vout->p_sys->p_palette + 3 * 256 * sizeof( u16 );
 571
 572         /* Save the colormap */
 573         ioctl( p_vout->p_sys->i_fd, FBIOGETCMAP, &p_vout->p_sys->fb_cmap );
 574
 575         p_vout->p_sys->i_bytes_per_pixel = 1;
 576         break;
 577
 578     case 15:
 579     case 16:
 580         p_vout->p_sys->i_bytes_per_pixel = 2;
 581         break;
 582
 583     case 24:
 584         p_vout->p_sys->i_bytes_per_pixel = 3;
 585         break;
 586
 587     case 32:
 588         p_vout->p_sys->i_bytes_per_pixel = 4;
 589         break;
 590
 591     default:
 592         msg_Err( p_vout, "screen depth %d is not supported",
 593                          p_vout->p_sys->var_info.bits_per_pixel );
 594
 595         /* Restore fb config */
 596         ioctl( p_vout->p_sys->i_fd,
 597                FBIOPUT_VSCREENINFO, &p_vout->p_sys->var_info );
 598
 599         close( p_vout->p_sys->i_fd );
 600         return 1;
 601     }
 602
 603     p_vout->p_sys->i_page_size = p_vout->p_sys->i_width *
 604                 p_vout->p_sys->i_height * p_vout->p_sys->i_bytes_per_pixel;
 605
 606     /* Map a framebuffer at the beginning */
 607     p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->i_page_size,
 608                                    PROT_READ | PROT_WRITE, MAP_SHARED,
 609                                    p_vout->p_sys->i_fd, 0 );
 610
 611     if( p_vout->p_sys->p_video == ((void*)-1) )
 612     {
 613         msg_Err( p_vout, "cannot map video memory (%s)", strerror(errno) );
 614
 615         if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 616         {
 617             free( p_vout->p_sys->p_palette );
 618         }
 619
 620         /* Restore fb config */
 621         ioctl( p_vout->p_sys->i_fd,
 622                FBIOPUT_VSCREENINFO, &p_vout->p_sys->var_info );
 623
 624         close( p_vout->p_sys->i_fd );
 625         return( 1 );
 626     }
 627
 628     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 629              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 630              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 631     return( 0 );
 632 }
 633
 634 /*****************************************************************************
 635  * CloseDisplay: terminate FB video thread output method
 636  *****************************************************************************/
 637 static void CloseDisplay( vout_thread_t *p_vout )
 638 {
 639     /* Clear display */
 640     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 641
 642     /* Restore palette */
 643     if( p_vout->p_sys->var_info.bits_per_pixel == 8 );
 644     {
 645         ioctl( p_vout->p_sys->i_fd,
 646                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 647         free( p_vout->p_sys->p_palette );
 648     }
 649
 650     /* Restore fb config */
 651     ioctl( p_vout->p_sys->i_fd,
 652            FBIOPUT_VSCREENINFO, &p_vout->p_sys->var_info );
 653
 654     /* Close fb */
 655     close( p_vout->p_sys->i_fd );
 656 }
 657
 658 /*****************************************************************************
 659  * SwitchDisplay: VT change signal handler
 660  *****************************************************************************
 661  * This function activates or deactivates the output of the thread. It is
 662  * called by the VT driver, on terminal change.
 663  *****************************************************************************/
 664 static void SwitchDisplay(int i_signal)
 665 {
 666 #if 0
 667     vout_thread_t *p_vout;
 668
 669     vlc_mutex_lock( &p_vout_bank->lock );
 670
 671     /* XXX: only test the first video output */
 672     if( p_vout_bank->i_count )
 673     {
 674         p_vout = p_vout_bank->pp_vout[0];
 675
 676         switch( i_signal )
 677         {
 678         case SIGUSR1:                                /* vt has been released */
 679             p_vout->b_active = 0;
 680             ioctl( p_vout->p_sys->i_tty, VT_RELDISP, 1 );
 681             break;
 682         case SIGUSR2:                                /* vt has been acquired */
 683             p_vout->b_active = 1;
 684             ioctl( p_vout->p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 685             /* handle blanking */
 686             vlc_mutex_lock( &p_vout->change_lock );
 687             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 688             vlc_mutex_unlock( &p_vout->change_lock );
 689             break;
 690         }
 691     }
 692
 693     vlc_mutex_unlock( &p_vout_bank->lock );
 694 #endif
 695 }
 696
 697 /*****************************************************************************
 698  * TextMode and GfxMode : switch tty to text/graphic mode
 699  *****************************************************************************
 700  * These functions toggle the tty mode.
 701  *****************************************************************************/
 702 static void TextMode( int i_tty )
 703 {
 704     /* return to text mode */
 705     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
 706     {
 707 //X        msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );
 708     }
 709 }
 710
 711 static void GfxMode( int i_tty )
 712 {
 713     /* switch to graphic mode */
 714     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
 715     {
 716 //X        msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );
 717     }
 718 }
 719