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 static int  Control   ( vout_thread_t *, int, va_list );
  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 #define DEVICE_TEXT N_("Framebuffer device")
  68 #define DEVICE_LONGTEXT N_( \
  69     "Framebuffer device to use for rendering (usually /dev/fb0).")
  70
  71 #define TTY_TEXT N_("Run fb on current tty.")
  72 #define TTY_LONGTEXT N_( \
  73     "Run framebuffer on current TTY device (default enabled). " \
  74     "(disable tty handling with caution)" )
  75
  76 #define CHROMA_TEXT N_("Chroma used.")
  77 #define CHROMA_LONGTEXT N_( \
  78     "Force use of a specific chroma for output. Default is I420." )
  79
  80 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  81 #define ASPECT_RATIO_LONGTEXT N_( \
  82     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  83
  84 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  85 #define FB_MODE_LONGTEXT N_( \
  86     "Select the resolution for the framebuffer. Currently it supports " \
  87     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
  88
  89 vlc_module_begin();
  90     set_shortname( "Framebuffer" );
  91     set_category( CAT_VIDEO );
  92     set_subcategory( SUBCAT_VIDEO_VOUT );
  93     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
  94               VLC_FALSE );
  95         change_safe(); /* ioctl() prevents doing bad things */
  96     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, VLC_TRUE );
  97         change_safe();
  98     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
  99                 VLC_TRUE );
 100         change_safe();
 101     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
 102                 ASPECT_RATIO_LONGTEXT, VLC_TRUE );
 103         change_safe();
 104     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
 105                  VLC_TRUE );
 106         change_safe();
 107     set_description( _("GNU/Linux console framebuffer video output") );
 108     set_capability( "video output", 30 );
 109     set_callbacks( Create, Destroy );
 110 vlc_module_end();
 111
 112 /*****************************************************************************
 113  * vout_sys_t: video output framebuffer method descriptor
 114  *****************************************************************************
 115  * This structure is part of the video output thread descriptor.
 116  * It describes the FB specific properties of an output thread.
 117  *****************************************************************************/
 118 struct vout_sys_t
 119 {
 120     /* System information */
 121     int                 i_tty;                          /* tty device handle */
 122     vlc_bool_t          b_tty;
 123     struct termios      old_termios;
 124
 125     /* Original configuration information */
 126     struct sigaction            sig_usr1;           /* USR1 previous handler */
 127     struct sigaction            sig_usr2;           /* USR2 previous handler */
 128     struct vt_mode              vt_mode;                 /* previous VT mode */
 129
 130     /* Framebuffer information */
 131     int                         i_fd;                       /* device handle */
 132     struct fb_var_screeninfo    old_info;       /* original mode information */
 133     struct fb_var_screeninfo    var_info;        /* current mode information */
 134     vlc_bool_t                  b_pan;     /* does device supports panning ? */
 135     struct fb_cmap              fb_cmap;                /* original colormap */
 136     uint16_t                    *p_palette;              /* original palette */
 137
 138     /* Video information */
 139     uint32_t i_width;
 140     uint32_t i_height;
 141     int i_aspect;
 142     int i_bytes_per_pixel;
 143     vlc_bool_t   b_auto;       /* Automatically adjust video size to fb size */
 144     vlc_fourcc_t i_chroma;
 145
 146     /* Video memory */
 147     byte_t *    p_video;                                      /* base adress */
 148     size_t      i_page_size;                                    /* page size */
 149 };
 150
 151 /*****************************************************************************
 152  * Create: allocates FB video thread output method
 153  *****************************************************************************
 154  * This function allocates and initializes a FB vout method.
 155  *****************************************************************************/
 156 static int Create( vlc_object_t *p_this )
 157 {
 158     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 159     vout_sys_t    *p_sys;
 160     char          *psz_chroma;
 161     char          *psz_aspect;
 162     int           i_mode;
 163     struct sigaction    sig_tty;                 /* sigaction for tty change */
 164     struct vt_mode      vt_mode;                          /* vt current mode */
 165     struct termios      new_termios;
 166
 167     /* Allocate instance and initialize some members */
 168     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 169     if( p_vout->p_sys == NULL )
 170     {
 171         msg_Err( p_vout, "out of memory" );
 172         return VLC_ENOMEM;
 173     };
 174     memset( p_sys, 0, sizeof(vout_sys_t) );
 175
 176     p_vout->pf_init = Init;
 177     p_vout->pf_end = End;
 178     p_vout->pf_manage = Manage;
 179     p_vout->pf_render = NULL;
 180     p_vout->pf_display = Display;
 181     p_vout->pf_control = Control;
 182
 183     /* Set tty and fb devices */
 184     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 185     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 186 #ifndef WIN32
 187 #if defined(HAVE_ISATTY)
 188     /* Check that stdin is a TTY */
 189     if( p_sys->b_tty && !isatty( 0 ) )
 190     {
 191         msg_Warn( p_vout, "fd 0 is not a TTY" );
 192         return VLC_EGENERIC;
 193     }
 194     else
 195     {
 196         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 197                           "there is no way to return to the tty." );
 198     }
 199 #endif
 200 #endif
 201
 202     psz_chroma = var_CreateGetNonEmptyString( p_vout, "fb-chroma" );
 203     if( psz_chroma )
 204     {
 205         if( strlen( psz_chroma ) == 4 )
 206         {
 207             p_sys->i_chroma = VLC_FOURCC( psz_chroma[0],
 208                                    psz_chroma[1],
 209                                    psz_chroma[2],
 210                                    psz_chroma[3] );
 211             msg_Dbg( p_vout, "forcing chroma '%s'", psz_chroma );
 212         }
 213         else
 214         {
 215             msg_Warn( p_vout, "invalid chroma (%s), using defaults.",
 216                       psz_chroma );
 217         }
 218         free( psz_chroma );
 219         psz_chroma = NULL;
 220     }
 221
 222     p_sys->i_aspect = -1;
 223     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 224     if( psz_aspect )
 225     {
 226         char *psz_parser = strchr( psz_aspect, ':' );
 227
 228         if( psz_parser )
 229         {
 230             *psz_parser++ = '\0';
 231             p_sys->i_aspect = ( atoi( psz_aspect )
 232                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 233         }
 234         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 235                   atoi( psz_aspect ), atoi( psz_parser ) );
 236
 237         free( psz_aspect );
 238         psz_aspect = NULL;
 239     }
 240
 241     p_sys->b_auto = VLC_FALSE;
 242     i_mode = var_CreateGetInteger( p_vout, "fb-mode" );
 243     switch( i_mode )
 244     {
 245         case 0: /* QCIF */
 246             p_sys->i_width  = 176;
 247             p_sys->i_height = 144;
 248             break;
 249         case 1: /* CIF */
 250             p_sys->i_width  = 352;
 251             p_sys->i_height = 288;
 252             break;
 253         case 2: /* NTSC */
 254             p_sys->i_width  = 640;
 255             p_sys->i_height = 480;
 256             break;
 257         case 3: /* PAL */
 258             p_sys->i_width  = 704;
 259             p_sys->i_height = 576;
 260             break;
 261         case 4:
 262         default:
 263             p_sys->b_auto = VLC_TRUE;
 264             break;
 265      }
 266
 267     /* tty handling */
 268     if( p_sys->b_tty )
 269     {
 270         GfxMode( p_sys->i_tty );
 271
 272         /* Set keyboard settings */
 273         if( tcgetattr(0, &p_vout->p_sys->old_termios) == -1 )
 274         {
 275             msg_Err( p_vout, "tcgetattr failed" );
 276         }
 277
 278         if( tcgetattr(0, &new_termios) == -1 )
 279         {
 280             msg_Err( p_vout, "tcgetattr failed" );
 281         }
 282
 283         /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 284         new_termios.c_lflag |= (ECHO | ECHOCTL); */
 285         new_termios.c_lflag &= ~ (ICANON);
 286         new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 287         new_termios.c_iflag = 0;
 288         new_termios.c_cc[VMIN] = 1;
 289         new_termios.c_cc[VTIME] = 0;
 290
 291         if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 292         {
 293             msg_Err( p_vout, "tcsetattr failed" );
 294         }
 295
 296         ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 297
 298         /* Set-up tty signal handler to be aware of tty changes */
 299         memset( &sig_tty, 0, sizeof( sig_tty ) );
 300         sig_tty.sa_handler = SwitchDisplay;
 301         sigemptyset( &sig_tty.sa_mask );
 302         if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 303             sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 304         {
 305             msg_Err( p_vout, "cannot set signal handler (%m)" );
 306             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 307             TextMode( p_sys->i_tty );
 308             free( p_vout->p_sys );
 309             return VLC_EGENERIC;
 310         }
 311
 312         /* Set-up tty according to new signal handler */
 313         if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 314         {
 315             msg_Err( p_vout, "cannot get terminal mode (%m)" );
 316             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 317             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 318             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 319             TextMode( p_sys->i_tty );
 320             free( p_vout->p_sys );
 321             return VLC_EGENERIC;
 322         }
 323         memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 324         vt_mode.mode   = VT_PROCESS;
 325         vt_mode.waitv  = 0;
 326         vt_mode.relsig = SIGUSR1;
 327         vt_mode.acqsig = SIGUSR2;
 328
 329         if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 330         {
 331             msg_Err( p_vout, "cannot set terminal mode (%m)" );
 332             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 333             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 334             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 335             TextMode( p_sys->i_tty );
 336             free( p_vout->p_sys );
 337             return VLC_EGENERIC;
 338         }
 339     }
 340
 341     if( OpenDisplay( p_vout ) )
 342     {
 343         if( p_sys->b_tty )
 344         {
 345             ioctl( p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 346             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 347             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 348             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 349             TextMode( p_sys->i_tty );
 350         }
 351         free( p_vout->p_sys );
 352         return VLC_EGENERIC;
 353     }
 354
 355     return VLC_SUCCESS;
 356 }
 357
 358 /*****************************************************************************
 359  * Init: initialize framebuffer video thread output method
 360  *****************************************************************************/
 361 static int Init( vout_thread_t *p_vout )
 362 {
 363     vout_sys_t *p_sys = p_vout->p_sys;
 364     int i_index;
 365     picture_t *p_pic;
 366
 367     I_OUTPUTPICTURES = 0;
 368
 369     if( p_sys->i_chroma == 0 )
 370     {
 371         /* Initialize the output structure: RGB with square pixels, whatever
 372          * the input format is, since it's the only format we know */
 373         switch( p_sys->var_info.bits_per_pixel )
 374         {
 375         case 8: /* FIXME: set the palette */
 376             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 377         case 15:
 378             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 379         case 16:
 380             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 381         case 24:
 382             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 383         case 32:
 384             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 385         default:
 386             msg_Err( p_vout, "unknown screen depth %i",
 387                      p_vout->p_sys->var_info.bits_per_pixel );
 388             return VLC_EGENERIC;
 389         }
 390
 391         if( p_sys->var_info.bits_per_pixel != 8 )
 392         {
 393             p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 394                                  << p_sys->var_info.red.offset;
 395             p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 396                                  << p_sys->var_info.green.offset;
 397             p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 398                                  << p_sys->var_info.blue.offset;
 399         }
 400     }
 401     else
 402     {
 403         p_vout->output.i_chroma = p_sys->i_chroma;
 404     }
 405     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 406
 407     if( !p_sys->b_auto )
 408     {
 409         p_vout->render.i_width = p_sys->i_width;
 410         p_vout->render.i_height = p_sys->i_height;
 411     }
 412     p_vout->output.i_width  = p_sys->i_width;
 413     p_vout->output.i_height = p_sys->i_height;
 414
 415     /* Assume we have square pixels */
 416     if( p_sys->i_aspect < 0 )
 417     {
 418         p_vout->output.i_aspect = ( p_sys->i_width
 419                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 420     }
 421     else p_vout->output.i_aspect = p_sys->i_aspect;
 422
 423     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 424     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 425
 426     /* Clear the screen */
 427     memset( p_sys->p_video, 0, p_sys->i_page_size );
 428
 429     /* Try to initialize 1 direct buffer */
 430     p_pic = NULL;
 431
 432     /* Find an empty picture slot */
 433     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 434     {
 435         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 436         {
 437             p_pic = p_vout->p_picture + i_index;
 438             break;
 439         }
 440     }
 441
 442     /* Allocate the picture */
 443     if( p_pic == NULL )
 444     {
 445         return VLC_EGENERIC;
 446     }
 447
 448     /* We know the chroma, allocate a buffer which will be used
 449      * directly by the decoder */
 450     p_pic->p->p_pixels = p_vout->p_sys->p_video;
 451     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 452     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 453     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 454
 455     if( p_vout->p_sys->var_info.xres_virtual )
 456     {
 457         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 458                              * p_vout->p_sys->i_bytes_per_pixel;
 459     }
 460     else
 461     {
 462         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 463                              * p_vout->p_sys->i_bytes_per_pixel;
 464     }
 465
 466     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 467                                  * p_vout->p_sys->i_bytes_per_pixel;
 468     p_pic->i_planes = 1;
 469     p_pic->i_status = DESTROYED_PICTURE;
 470     p_pic->i_type   = DIRECT_PICTURE;
 471
 472     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 473
 474     I_OUTPUTPICTURES++;
 475
 476     return VLC_SUCCESS;
 477 }
 478
 479 /*****************************************************************************
 480  * End: terminate framebuffer video thread output method
 481  *****************************************************************************/
 482 static void End( vout_thread_t *p_vout )
 483 {
 484     /* Clear the screen */
 485     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 486 }
 487
 488 /*****************************************************************************
 489  * Destroy: destroy FB video thread output method
 490  *****************************************************************************
 491  * Terminate an output method created by Create
 492  *****************************************************************************/
 493 static void Destroy( vlc_object_t *p_this )
 494 {
 495     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 496
 497     CloseDisplay( p_vout );
 498
 499     if( p_vout->p_sys->b_tty )
 500     {
 501         /* Reset the terminal */
 502         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 503
 504         /* Remove signal handlers */
 505         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 506         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 507
 508         /* Reset the keyboard state */
 509         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 510
 511         /* Return to text mode */
 512         TextMode( p_vout->p_sys->i_tty );
 513     }
 514
 515     /* Destroy structure */
 516     free( p_vout->p_sys );
 517 }
 518
 519 /*****************************************************************************
 520  * Control: control facility for the vout
 521  *****************************************************************************/
 522 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 523 {
 524     switch( i_query )
 525     {
 526        default:
 527             return vout_vaControlDefault( p_vout, i_query, args );
 528     }
 529 }
 530
 531 /*****************************************************************************
 532  * Manage: handle FB events
 533  *****************************************************************************
 534  * This function should be called regularly by video output thread. It manages
 535  * console events. It returns a non null value on error.
 536  *****************************************************************************/
 537 static int Manage( vout_thread_t *p_vout )
 538 {
 539 #if 0
 540     uint8_t buf;
 541
 542     if ( read(0, &buf, 1) == 1)
 543     {
 544         switch( buf )
 545         {
 546         case 'q':
 547             vlc_object_kill( p_vout->p_libvlc );
 548             break;
 549
 550         default:
 551             break;
 552         }
 553     }
 554 #endif
 555
 556     /*
 557      * Size change
 558      */
 559     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 560     {
 561         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 562         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 563
 564         /* Destroy XImages to change their size */
 565         End( p_vout );
 566
 567         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 568         if( Init( p_vout ) )
 569         {
 570             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 571             return VLC_EGENERIC;
 572         }
 573
 574         /* Clear screen */
 575         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 576
 577 #if 0
 578         /* Tell the video output thread that it will need to rebuild YUV
 579          * tables. This is needed since conversion buffer size may have changed */
 580         p_vout->i_changes |= VOUT_YUV_CHANGE;
 581 #endif
 582     }
 583
 584     return VLC_SUCCESS;
 585 }
 586
 587 /*****************************************************************************
 588  * Display: displays previously rendered output
 589  *****************************************************************************
 590  * This function send the currently rendered image to FB image, waits until
 591  * it is displayed and switch the two rendering buffers, preparing next frame.
 592  *****************************************************************************/
 593 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 594 {
 595 static int panned=0;
 596     /* swap the two Y offsets if the drivers supports panning */
 597     if( p_vout->p_sys->b_pan )
 598     {
 599         p_vout->p_sys->var_info.yoffset = 0;
 600         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 601
 602         /* the X offset should be 0, but who knows ...
 603          * some other app might have played with the framebuffer */
 604         p_vout->p_sys->var_info.xoffset = 0;
 605
 606         if( panned < 0 )
 607         {
 608             ioctl( p_vout->p_sys->i_fd,
 609                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 610             panned++;
 611         }
 612     }
 613 }
 614
 615 #if 0
 616 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 617                                                uint16_t *blue, uint16_t *transp )
 618 {
 619     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 620
 621     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 622 }
 623 #endif
 624
 625 /* following functions are local */
 626
 627 /*****************************************************************************
 628  * OpenDisplay: initialize framebuffer
 629  *****************************************************************************/
 630 static int OpenDisplay( vout_thread_t *p_vout )
 631 {
 632     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 633     char *psz_device;                             /* framebuffer device path */
 634     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 635
 636     /* Open framebuffer device */
 637     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 638     {
 639         msg_Err( p_vout, "don't know which fb device to open" );
 640         return VLC_EGENERIC;
 641     }
 642
 643     p_sys->i_fd = open( psz_device, O_RDWR);
 644     if( p_sys->i_fd == -1 )
 645     {
 646         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 647         free( psz_device );
 648         return VLC_EGENERIC;
 649     }
 650     free( psz_device );
 651     psz_device = NULL;
 652
 653     /* Get framebuffer device information */
 654     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 655     {
 656         msg_Err( p_vout, "cannot get fb info (%m)" );
 657         close( p_sys->i_fd );
 658         return VLC_EGENERIC;
 659     }
 660
 661     memcpy( &p_sys->old_info, &p_sys->var_info,
 662             sizeof( struct fb_var_screeninfo ) );
 663
 664     /* Get some info on the framebuffer itself */
 665     if( !p_sys->b_auto )
 666     {
 667         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 668         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 669         p_vout->fmt_out.i_width = p_sys->i_width;
 670         p_vout->fmt_out.i_height = p_sys->i_height;
 671     }
 672
 673     /* Set some attributes */
 674     p_sys->var_info.activate = p_sys->b_tty
 675                                ? FB_ACTIVATE_NXTOPEN
 676                                : FB_ACTIVATE_NOW;
 677     p_sys->var_info.xoffset =  0;
 678     p_sys->var_info.yoffset =  0;
 679
 680     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 681     {
 682         msg_Err( p_vout, "cannot set fb info (%m)" );
 683         close( p_sys->i_fd );
 684         return VLC_EGENERIC;
 685     }
 686
 687     /* Get some information again, in the definitive configuration */
 688     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 689          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 690     {
 691         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 692
 693         /* Restore fb config */
 694         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 695
 696         close( p_sys->i_fd );
 697         return VLC_EGENERIC;
 698     }
 699
 700     /* If the fb has limitations on mode change,
 701      * then keep the resolution of the fb */
 702     if( (p_sys->i_height != p_sys->var_info.yres) ||
 703         (p_sys->i_width != p_sys->var_info.xres) )
 704     {
 705         p_sys->b_auto = VLC_TRUE;
 706         msg_Warn( p_vout,
 707                   "using framebuffer native resolution instead of requested (%ix%i)",
 708                   p_sys->i_width, p_sys->i_height );
 709     }
 710     p_sys->i_height = p_sys->var_info.yres;
 711     p_sys->i_width  = p_sys->var_info.xres_virtual
 712                                ? p_sys->var_info.xres_virtual
 713                                : p_sys->var_info.xres;
 714
 715     /* FIXME: if the image is full-size, it gets cropped on the left
 716      * because of the xres / xres_virtual slight difference */
 717     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 718              p_sys->var_info.xres, p_sys->var_info.yres,
 719              p_sys->var_info.xres_virtual,
 720              p_sys->var_info.yres_virtual,
 721              p_sys->i_width, p_sys->i_height );
 722
 723     p_sys->p_palette = NULL;
 724     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 725
 726     switch( p_sys->var_info.bits_per_pixel )
 727     {
 728     case 8:
 729         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 730         if( !p_sys->p_palette )
 731         {
 732             msg_Err( p_vout, "out of memory" );
 733
 734             /* Restore fb config */
 735             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 736
 737             close( p_sys->i_fd );
 738             return VLC_ENOMEM;
 739         }
 740         p_sys->fb_cmap.start = 0;
 741         p_sys->fb_cmap.len = 256;
 742         p_sys->fb_cmap.red = p_sys->p_palette;
 743         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 744         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 745         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 746
 747         /* Save the colormap */
 748         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 749
 750         p_sys->i_bytes_per_pixel = 1;
 751         break;
 752
 753     case 15:
 754     case 16:
 755         p_sys->i_bytes_per_pixel = 2;
 756         break;
 757
 758     case 24:
 759         p_sys->i_bytes_per_pixel = 3;
 760         break;
 761
 762     case 32:
 763         p_sys->i_bytes_per_pixel = 4;
 764         break;
 765
 766     default:
 767         msg_Err( p_vout, "screen depth %d is not supported",
 768                          p_sys->var_info.bits_per_pixel );
 769
 770         /* Restore fb config */
 771         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 772
 773         close( p_sys->i_fd );
 774         return VLC_EGENERIC;
 775     }
 776
 777     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 778                          p_sys->i_bytes_per_pixel;
 779
 780     /* Map a framebuffer at the beginning */
 781     p_sys->p_video = mmap( 0, p_sys->i_page_size,
 782                               PROT_READ | PROT_WRITE, MAP_SHARED,
 783                               p_sys->i_fd, 0 );
 784
 785     if( p_sys->p_video == ((void*)-1) )
 786     {
 787         msg_Err( p_vout, "cannot map video memory (%m)" );
 788
 789         if( p_sys->var_info.bits_per_pixel == 8 )
 790         {
 791             free( p_sys->p_palette );
 792             p_sys->p_palette = NULL;
 793         }
 794
 795         /* Restore fb config */
 796         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 797
 798         close( p_sys->i_fd );
 799         return VLC_EGENERIC;
 800     }
 801
 802     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 803              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 804              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 805     return VLC_SUCCESS;
 806 }
 807
 808 /*****************************************************************************
 809  * CloseDisplay: terminate FB video thread output method
 810  *****************************************************************************/
 811 static void CloseDisplay( vout_thread_t *p_vout )
 812 {
 813     /* Clear display */
 814     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 815
 816     /* Restore palette */
 817     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 818     {
 819         ioctl( p_vout->p_sys->i_fd,
 820                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 821         free( p_vout->p_sys->p_palette );
 822         p_vout->p_sys->p_palette = NULL;
 823     }
 824
 825     /* Restore fb config */
 826     ioctl( p_vout->p_sys->i_fd,
 827            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 828
 829     /* Close fb */
 830     close( p_vout->p_sys->i_fd );
 831 }
 832
 833 /*****************************************************************************
 834  * SwitchDisplay: VT change signal handler
 835  *****************************************************************************
 836  * This function activates or deactivates the output of the thread. It is
 837  * called by the VT driver, on terminal change.
 838  *****************************************************************************/
 839 static void SwitchDisplay(int i_signal)
 840 {
 841 #if 0
 842     vout_thread_t *p_vout;
 843
 844     vlc_mutex_lock( &p_vout_bank->lock );
 845
 846     /* XXX: only test the first video output */
 847     if( p_vout_bank->i_count )
 848     {
 849         p_vout = p_vout_bank->pp_vout[0];
 850
 851         switch( i_signal )
 852         {
 853         case SIGUSR1:                                /* vt has been released */
 854             p_vout->b_active = 0;
 855             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 856             break;
 857         case SIGUSR2:                                /* vt has been acquired */
 858             p_vout->b_active = 1;
 859             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 860             /* handle blanking */
 861             vlc_mutex_lock( &p_vout->change_lock );
 862             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 863             vlc_mutex_unlock( &p_vout->change_lock );
 864             break;
 865         }
 866     }
 867
 868     vlc_mutex_unlock( &p_vout_bank->lock );
 869 #endif
 870 }
 871
 872 /*****************************************************************************
 873  * TextMode and GfxMode : switch tty to text/graphic mode
 874  *****************************************************************************
 875  * These functions toggle the tty mode.
 876  *****************************************************************************/
 877 static void TextMode( int i_tty )
 878 {
 879     /* return to text mode */
 880     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
 881     {
 882         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
 883     }
 884 }
 885
 886 static void GfxMode( int i_tty )
 887 {
 888     /* switch to graphic mode */
 889     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
 890     {
 891         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
 892     }
 893 }