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 #ifdef HAVE_CONFIG_H
  42 # include "config.h"
  43 #endif
  44
  45 #include <vlc/vlc.h>
  46 #include <vlc_vout.h>
  47
  48 /*****************************************************************************
  49  * Local prototypes
  50  *****************************************************************************/
  51 static int  Create    ( vlc_object_t * );
  52 static void Destroy   ( vlc_object_t * );
  53
  54 static int  Init      ( vout_thread_t * );
  55 static void End       ( vout_thread_t * );
  56 static int  Manage    ( vout_thread_t * );
  57 static void Display   ( vout_thread_t *, picture_t * );
  58 static int  Control   ( vout_thread_t *, int, va_list );
  59
  60 static int  OpenDisplay    ( vout_thread_t * );
  61 static void CloseDisplay   ( vout_thread_t * );
  62 static void SwitchDisplay  ( int i_signal );
  63 static void TextMode       ( int i_tty );
  64 static void GfxMode        ( int i_tty );
  65
  66 /*****************************************************************************
  67  * Module descriptor
  68  *****************************************************************************/
  69 #define FB_DEV_VAR "fbdev"
  70
  71 #define DEVICE_TEXT N_("Framebuffer device")
  72 #define DEVICE_LONGTEXT N_( \
  73     "Framebuffer device to use for rendering (usually /dev/fb0).")
  74
  75 #define TTY_TEXT N_("Run fb on current tty.")
  76 #define TTY_LONGTEXT N_( \
  77     "Run framebuffer on current TTY device (default enabled). " \
  78     "(disable tty handling with caution)" )
  79
  80 #define CHROMA_TEXT N_("Chroma used.")
  81 #define CHROMA_LONGTEXT N_( \
  82     "Force use of a specific chroma for output. Default is I420." )
  83
  84 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  85 #define ASPECT_RATIO_LONGTEXT N_( \
  86     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  87
  88 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  89 #define FB_MODE_LONGTEXT N_( \
  90     "Select the resolution for the framebuffer. Currently it supports " \
  91     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
  92
  93 vlc_module_begin();
  94     set_shortname( "Framebuffer" );
  95     set_category( CAT_VIDEO );
  96     set_subcategory( SUBCAT_VIDEO_VOUT );
  97     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
  98               VLC_FALSE );
  99     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, VLC_TRUE );
 100     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 101                 VLC_TRUE );
 102     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
 103                 ASPECT_RATIO_LONGTEXT, VLC_TRUE );
 104     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
 105                  VLC_TRUE );
 106     set_description( _("GNU/Linux console framebuffer video output") );
 107     set_capability( "video output", 30 );
 108     set_callbacks( Create, Destroy );
 109 vlc_module_end();
 110
 111 /*****************************************************************************
 112  * vout_sys_t: video output framebuffer method descriptor
 113  *****************************************************************************
 114  * This structure is part of the video output thread descriptor.
 115  * It describes the FB specific properties of an output thread.
 116  *****************************************************************************/
 117 struct vout_sys_t
 118 {
 119     /* System information */
 120     int                 i_tty;                          /* tty device handle */
 121     vlc_bool_t          b_tty;
 122     struct termios      old_termios;
 123
 124     /* Original configuration information */
 125     struct sigaction            sig_usr1;           /* USR1 previous handler */
 126     struct sigaction            sig_usr2;           /* USR2 previous handler */
 127     struct vt_mode              vt_mode;                 /* previous VT mode */
 128
 129     /* Framebuffer information */
 130     int                         i_fd;                       /* device handle */
 131     struct fb_var_screeninfo    old_info;       /* original mode information */
 132     struct fb_var_screeninfo    var_info;        /* current mode information */
 133     vlc_bool_t                  b_pan;     /* does device supports panning ? */
 134     struct fb_cmap              fb_cmap;                /* original colormap */
 135     uint16_t                    *p_palette;              /* original palette */
 136
 137     /* Video information */
 138     uint32_t i_width;
 139     uint32_t i_height;
 140     int i_aspect;
 141     int i_bytes_per_pixel;
 142     vlc_bool_t   b_auto;       /* Automatically adjust video size to fb size */
 143     vlc_fourcc_t i_chroma;
 144
 145     /* Video memory */
 146     byte_t *    p_video;                                      /* base adress */
 147     size_t      i_page_size;                                    /* page size */
 148 };
 149
 150 /*****************************************************************************
 151  * Create: allocates FB video thread output method
 152  *****************************************************************************
 153  * This function allocates and initializes a FB vout method.
 154  *****************************************************************************/
 155 static int Create( vlc_object_t *p_this )
 156 {
 157     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 158     vout_sys_t    *p_sys;
 159     char          *psz_chroma;
 160     char          *psz_aspect;
 161     int           i_mode;
 162     struct sigaction    sig_tty;                 /* sigaction for tty change */
 163     struct vt_mode      vt_mode;                          /* vt current mode */
 164     struct termios      new_termios;
 165
 166     /* Allocate instance and initialize some members */
 167     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 168     if( p_vout->p_sys == NULL )
 169     {
 170         msg_Err( p_vout, "out of memory" );
 171         return VLC_ENOMEM;
 172     };
 173     memset( p_sys, 0, sizeof(vout_sys_t) );
 174
 175     p_vout->pf_init = Init;
 176     p_vout->pf_end = End;
 177     p_vout->pf_manage = Manage;
 178     p_vout->pf_render = NULL;
 179     p_vout->pf_display = Display;
 180     p_vout->pf_control = Control;
 181
 182     /* Set tty and fb devices */
 183     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 184     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 185 #ifndef WIN32
 186 #if defined(HAVE_ISATTY)
 187     /* Check that stdin is a TTY */
 188     if( p_sys->b_tty && !isatty( 0 ) )
 189     {
 190         msg_Warn( p_vout, "fd 0 is not a TTY" );
 191         return VLC_EGENERIC;
 192     }
 193     else
 194     {
 195         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 196                           "there is no way to return to the tty." );
 197     }
 198 #endif
 199 #endif
 200
 201     psz_chroma = var_CreateGetNonEmptyString( p_vout, "fb-chroma" );
 202     if( psz_chroma )
 203     {
 204         if( strlen( psz_chroma ) == 4 )
 205         {
 206             p_sys->i_chroma = VLC_FOURCC( psz_chroma[0],
 207                                    psz_chroma[1],
 208                                    psz_chroma[2],
 209                                    psz_chroma[3] );
 210             msg_Dbg( p_vout, "forcing chroma '%s'", psz_chroma );
 211         }
 212         else
 213         {
 214             msg_Warn( p_vout, "invalid chroma (%s), using defaults.",
 215                       psz_chroma );
 216         }
 217         free( psz_chroma );
 218         psz_chroma = NULL;
 219     }
 220
 221     p_sys->i_aspect = -1;
 222     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 223     if( psz_aspect )
 224     {
 225         char *psz_parser = strchr( psz_aspect, ':' );
 226
 227         if( psz_parser )
 228         {
 229             *psz_parser++ = '\0';
 230             p_sys->i_aspect = ( atoi( psz_aspect )
 231                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 232         }
 233         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 234                   atoi( psz_aspect ), atoi( psz_parser ) );
 235
 236         free( psz_aspect );
 237         psz_aspect = NULL;
 238     }
 239
 240     p_sys->b_auto = VLC_FALSE;
 241     i_mode = var_CreateGetInteger( p_vout, "fb-mode" );
 242     switch( i_mode )
 243     {
 244         case 0: /* QCIF */
 245             p_sys->i_width  = 176;
 246             p_sys->i_height = 144;
 247             break;
 248         case 1: /* CIF */
 249             p_sys->i_width  = 352;
 250             p_sys->i_height = 288;
 251             break;
 252         case 2: /* NTSC */
 253             p_sys->i_width  = 640;
 254             p_sys->i_height = 480;
 255             break;
 256         case 3: /* PAL */
 257             p_sys->i_width  = 704;
 258             p_sys->i_height = 576;
 259             break;
 260         case 4:
 261         default:
 262             p_sys->b_auto = VLC_TRUE;
 263             break;
 264      }
 265
 266     /* tty handling */
 267     if( p_sys->b_tty )
 268     {
 269         GfxMode( p_sys->i_tty );
 270
 271         /* Set keyboard settings */
 272         if( tcgetattr(0, &p_vout->p_sys->old_termios) == -1 )
 273         {
 274             msg_Err( p_vout, "tcgetattr failed" );
 275         }
 276
 277         if( tcgetattr(0, &new_termios) == -1 )
 278         {
 279             msg_Err( p_vout, "tcgetattr failed" );
 280         }
 281
 282         /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 283         new_termios.c_lflag |= (ECHO | ECHOCTL); */
 284         new_termios.c_lflag &= ~ (ICANON);
 285         new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 286         new_termios.c_iflag = 0;
 287         new_termios.c_cc[VMIN] = 1;
 288         new_termios.c_cc[VTIME] = 0;
 289
 290         if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 291         {
 292             msg_Err( p_vout, "tcsetattr failed" );
 293         }
 294
 295         ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 296
 297         /* Set-up tty signal handler to be aware of tty changes */
 298         memset( &sig_tty, 0, sizeof( sig_tty ) );
 299         sig_tty.sa_handler = SwitchDisplay;
 300         sigemptyset( &sig_tty.sa_mask );
 301         if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 302             sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 303         {
 304             msg_Err( p_vout, "cannot set signal handler (%m)" );
 305             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 306             TextMode( p_sys->i_tty );
 307             free( p_vout->p_sys );
 308             return VLC_EGENERIC;
 309         }
 310
 311         /* Set-up tty according to new signal handler */
 312         if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 313         {
 314             msg_Err( p_vout, "cannot get terminal mode (%m)" );
 315             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 316             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 317             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 318             TextMode( p_sys->i_tty );
 319             free( p_vout->p_sys );
 320             return VLC_EGENERIC;
 321         }
 322         memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 323         vt_mode.mode   = VT_PROCESS;
 324         vt_mode.waitv  = 0;
 325         vt_mode.relsig = SIGUSR1;
 326         vt_mode.acqsig = SIGUSR2;
 327
 328         if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 329         {
 330             msg_Err( p_vout, "cannot set terminal mode (%m)" );
 331             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 332             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 333             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 334             TextMode( p_sys->i_tty );
 335             free( p_vout->p_sys );
 336             return VLC_EGENERIC;
 337         }
 338     }
 339
 340     if( OpenDisplay( p_vout ) )
 341     {
 342         if( p_sys->b_tty )
 343         {
 344             ioctl( p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 345             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 346             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 347             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 348             TextMode( p_sys->i_tty );
 349         }
 350         free( p_vout->p_sys );
 351         return VLC_EGENERIC;
 352     }
 353
 354     return VLC_SUCCESS;
 355 }
 356
 357 /*****************************************************************************
 358  * Init: initialize framebuffer video thread output method
 359  *****************************************************************************/
 360 static int Init( vout_thread_t *p_vout )
 361 {
 362     vout_sys_t *p_sys = p_vout->p_sys;
 363     int i_index;
 364     picture_t *p_pic;
 365
 366     I_OUTPUTPICTURES = 0;
 367
 368     if( p_sys->i_chroma == 0 )
 369     {
 370         /* Initialize the output structure: RGB with square pixels, whatever
 371          * the input format is, since it's the only format we know */
 372         switch( p_sys->var_info.bits_per_pixel )
 373         {
 374         case 8: /* FIXME: set the palette */
 375             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 376         case 15:
 377             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 378         case 16:
 379             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 380         case 24:
 381             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 382         case 32:
 383             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 384         default:
 385             msg_Err( p_vout, "unknown screen depth %i",
 386                      p_vout->p_sys->var_info.bits_per_pixel );
 387             return VLC_EGENERIC;
 388         }
 389
 390         if( p_sys->var_info.bits_per_pixel != 8 )
 391         {
 392             p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 393                                  << p_sys->var_info.red.offset;
 394             p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 395                                  << p_sys->var_info.green.offset;
 396             p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 397                                  << p_sys->var_info.blue.offset;
 398         }
 399     }
 400     else
 401     {
 402         p_vout->output.i_chroma = p_sys->i_chroma;
 403     }
 404     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 405
 406     if( !p_sys->b_auto )
 407     {
 408         p_vout->render.i_width = p_sys->i_width;
 409         p_vout->render.i_height = p_sys->i_height;
 410     }
 411     p_vout->output.i_width  = p_sys->i_width;
 412     p_vout->output.i_height = p_sys->i_height;
 413
 414     /* Assume we have square pixels */
 415     if( p_sys->i_aspect < 0 )
 416     {
 417         p_vout->output.i_aspect = ( p_sys->i_width
 418                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 419     }
 420     else p_vout->output.i_aspect = p_sys->i_aspect;
 421
 422     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 423     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 424
 425     /* Clear the screen */
 426     memset( p_sys->p_video, 0, p_sys->i_page_size );
 427
 428     /* Try to initialize 1 direct buffer */
 429     p_pic = NULL;
 430
 431     /* Find an empty picture slot */
 432     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 433     {
 434         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 435         {
 436             p_pic = p_vout->p_picture + i_index;
 437             break;
 438         }
 439     }
 440
 441     /* Allocate the picture */
 442     if( p_pic == NULL )
 443     {
 444         return VLC_EGENERIC;
 445     }
 446
 447     /* We know the chroma, allocate a buffer which will be used
 448      * directly by the decoder */
 449     p_pic->p->p_pixels = p_vout->p_sys->p_video;
 450     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 451     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 452     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 453
 454     if( p_vout->p_sys->var_info.xres_virtual )
 455     {
 456         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 457                              * p_vout->p_sys->i_bytes_per_pixel;
 458     }
 459     else
 460     {
 461         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 462                              * p_vout->p_sys->i_bytes_per_pixel;
 463     }
 464
 465     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 466                                  * p_vout->p_sys->i_bytes_per_pixel;
 467     p_pic->i_planes = 1;
 468     p_pic->i_status = DESTROYED_PICTURE;
 469     p_pic->i_type   = DIRECT_PICTURE;
 470
 471     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 472
 473     I_OUTPUTPICTURES++;
 474
 475     return VLC_SUCCESS;
 476 }
 477
 478 /*****************************************************************************
 479  * End: terminate framebuffer video thread output method
 480  *****************************************************************************/
 481 static void End( vout_thread_t *p_vout )
 482 {
 483     /* Clear the screen */
 484     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 485 }
 486
 487 /*****************************************************************************
 488  * Destroy: destroy FB video thread output method
 489  *****************************************************************************
 490  * Terminate an output method created by Create
 491  *****************************************************************************/
 492 static void Destroy( vlc_object_t *p_this )
 493 {
 494     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 495
 496     CloseDisplay( p_vout );
 497
 498     if( p_vout->p_sys->b_tty )
 499     {
 500         /* Reset the terminal */
 501         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 502
 503         /* Remove signal handlers */
 504         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 505         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 506
 507         /* Reset the keyboard state */
 508         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 509
 510         /* Return to text mode */
 511         TextMode( p_vout->p_sys->i_tty );
 512     }
 513
 514     /* Destroy structure */
 515     free( p_vout->p_sys );
 516 }
 517
 518 /*****************************************************************************
 519  * Control: control facility for the vout
 520  *****************************************************************************/
 521 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 522 {
 523     switch( i_query )
 524     {
 525        default:
 526             return vout_vaControlDefault( p_vout, i_query, args );
 527     }
 528 }
 529
 530 /*****************************************************************************
 531  * Manage: handle FB events
 532  *****************************************************************************
 533  * This function should be called regularly by video output thread. It manages
 534  * console events. It returns a non null value on error.
 535  *****************************************************************************/
 536 static int Manage( vout_thread_t *p_vout )
 537 {
 538 #if 0
 539     uint8_t buf;
 540
 541     if ( read(0, &buf, 1) == 1)
 542     {
 543         switch( buf )
 544         {
 545         case 'q':
 546             vlc_object_kill( p_vout->p_libvlc );
 547             break;
 548
 549         default:
 550             break;
 551         }
 552     }
 553 #endif
 554
 555     /*
 556      * Size change
 557      */
 558     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 559     {
 560         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 561         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 562
 563         /* Destroy XImages to change their size */
 564         End( p_vout );
 565
 566         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 567         if( Init( p_vout ) )
 568         {
 569             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 570             return VLC_EGENERIC;
 571         }
 572
 573         /* Clear screen */
 574         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 575
 576 #if 0
 577         /* Tell the video output thread that it will need to rebuild YUV
 578          * tables. This is needed since conversion buffer size may have changed */
 579         p_vout->i_changes |= VOUT_YUV_CHANGE;
 580 #endif
 581     }
 582
 583     return VLC_SUCCESS;
 584 }
 585
 586 /*****************************************************************************
 587  * Display: displays previously rendered output
 588  *****************************************************************************
 589  * This function send the currently rendered image to FB image, waits until
 590  * it is displayed and switch the two rendering buffers, preparing next frame.
 591  *****************************************************************************/
 592 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 593 {
 594 static int panned=0;
 595     /* swap the two Y offsets if the drivers supports panning */
 596     if( p_vout->p_sys->b_pan )
 597     {
 598         p_vout->p_sys->var_info.yoffset = 0;
 599         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 600
 601         /* the X offset should be 0, but who knows ...
 602          * some other app might have played with the framebuffer */
 603         p_vout->p_sys->var_info.xoffset = 0;
 604
 605         if( panned < 0 )
 606         {
 607             ioctl( p_vout->p_sys->i_fd,
 608                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 609             panned++;
 610         }
 611     }
 612 }
 613
 614 #if 0
 615 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 616                                                uint16_t *blue, uint16_t *transp )
 617 {
 618     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 619
 620     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 621 }
 622 #endif
 623
 624 /* following functions are local */
 625
 626 /*****************************************************************************
 627  * OpenDisplay: initialize framebuffer
 628  *****************************************************************************/
 629 static int OpenDisplay( vout_thread_t *p_vout )
 630 {
 631     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 632     char *psz_device;                             /* framebuffer device path */
 633     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 634
 635     /* Open framebuffer device */
 636     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 637     {
 638         msg_Err( p_vout, "don't know which fb device to open" );
 639         return VLC_EGENERIC;
 640     }
 641
 642     p_sys->i_fd = open( psz_device, O_RDWR);
 643     if( p_sys->i_fd == -1 )
 644     {
 645         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 646         free( psz_device );
 647         return VLC_EGENERIC;
 648     }
 649     free( psz_device );
 650     psz_device = NULL;
 651
 652     /* Get framebuffer device information */
 653     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 654     {
 655         msg_Err( p_vout, "cannot get fb info (%m)" );
 656         close( p_sys->i_fd );
 657         return VLC_EGENERIC;
 658     }
 659
 660     memcpy( &p_sys->old_info, &p_sys->var_info,
 661             sizeof( struct fb_var_screeninfo ) );
 662
 663     /* Get some info on the framebuffer itself */
 664     if( !p_sys->b_auto )
 665     {
 666         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 667         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 668         p_vout->fmt_out.i_width = p_sys->i_width;
 669         p_vout->fmt_out.i_height = p_sys->i_height;
 670     }
 671
 672     /* Set some attributes */
 673     p_sys->var_info.activate = p_sys->b_tty
 674                                ? FB_ACTIVATE_NXTOPEN
 675                                : FB_ACTIVATE_NOW;
 676     p_sys->var_info.xoffset =  0;
 677     p_sys->var_info.yoffset =  0;
 678
 679     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 680     {
 681         msg_Err( p_vout, "cannot set fb info (%m)" );
 682         close( p_sys->i_fd );
 683         return VLC_EGENERIC;
 684     }
 685
 686     /* Get some information again, in the definitive configuration */
 687     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 688          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 689     {
 690         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 691
 692         /* Restore fb config */
 693         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 694
 695         close( p_sys->i_fd );
 696         return VLC_EGENERIC;
 697     }
 698
 699     /* If the fb has limitations on mode change,
 700      * then keep the resolution of the fb */
 701     if( (p_sys->i_height != p_sys->var_info.yres) ||
 702         (p_sys->i_width != p_sys->var_info.xres) )
 703     {
 704         p_sys->b_auto = VLC_TRUE;
 705         msg_Warn( p_vout,
 706                   "using framebuffer native resolution instead of requested (%ix%i)",
 707                   p_sys->i_width, p_sys->i_height );
 708     }
 709     p_sys->i_height = p_sys->var_info.yres;
 710     p_sys->i_width  = p_sys->var_info.xres_virtual
 711                                ? p_sys->var_info.xres_virtual
 712                                : p_sys->var_info.xres;
 713
 714     /* FIXME: if the image is full-size, it gets cropped on the left
 715      * because of the xres / xres_virtual slight difference */
 716     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 717              p_sys->var_info.xres, p_sys->var_info.yres,
 718              p_sys->var_info.xres_virtual,
 719              p_sys->var_info.yres_virtual,
 720              p_sys->i_width, p_sys->i_height );
 721
 722     p_sys->p_palette = NULL;
 723     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 724
 725     switch( p_sys->var_info.bits_per_pixel )
 726     {
 727     case 8:
 728         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 729         if( !p_sys->p_palette )
 730         {
 731             msg_Err( p_vout, "out of memory" );
 732
 733             /* Restore fb config */
 734             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 735
 736             close( p_sys->i_fd );
 737             return VLC_ENOMEM;
 738         }
 739         p_sys->fb_cmap.start = 0;
 740         p_sys->fb_cmap.len = 256;
 741         p_sys->fb_cmap.red = p_sys->p_palette;
 742         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 743         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 744         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 745
 746         /* Save the colormap */
 747         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 748
 749         p_sys->i_bytes_per_pixel = 1;
 750         break;
 751
 752     case 15:
 753     case 16:
 754         p_sys->i_bytes_per_pixel = 2;
 755         break;
 756
 757     case 24:
 758         p_sys->i_bytes_per_pixel = 3;
 759         break;
 760
 761     case 32:
 762         p_sys->i_bytes_per_pixel = 4;
 763         break;
 764
 765     default:
 766         msg_Err( p_vout, "screen depth %d is not supported",
 767                          p_sys->var_info.bits_per_pixel );
 768
 769         /* Restore fb config */
 770         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 771
 772         close( p_sys->i_fd );
 773         return VLC_EGENERIC;
 774     }
 775
 776     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 777                          p_sys->i_bytes_per_pixel;
 778
 779     /* Map a framebuffer at the beginning */
 780     p_sys->p_video = mmap( 0, p_sys->i_page_size,
 781                               PROT_READ | PROT_WRITE, MAP_SHARED,
 782                               p_sys->i_fd, 0 );
 783
 784     if( p_sys->p_video == ((void*)-1) )
 785     {
 786         msg_Err( p_vout, "cannot map video memory (%m)" );
 787
 788         if( p_sys->var_info.bits_per_pixel == 8 )
 789         {
 790             free( p_sys->p_palette );
 791             p_sys->p_palette = NULL;
 792         }
 793
 794         /* Restore fb config */
 795         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 796
 797         close( p_sys->i_fd );
 798         return VLC_EGENERIC;
 799     }
 800
 801     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 802              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 803              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 804     return VLC_SUCCESS;
 805 }
 806
 807 /*****************************************************************************
 808  * CloseDisplay: terminate FB video thread output method
 809  *****************************************************************************/
 810 static void CloseDisplay( vout_thread_t *p_vout )
 811 {
 812     /* Clear display */
 813     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 814
 815     /* Restore palette */
 816     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 817     {
 818         ioctl( p_vout->p_sys->i_fd,
 819                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 820         free( p_vout->p_sys->p_palette );
 821         p_vout->p_sys->p_palette = NULL;
 822     }
 823
 824     /* Restore fb config */
 825     ioctl( p_vout->p_sys->i_fd,
 826            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 827
 828     /* Close fb */
 829     close( p_vout->p_sys->i_fd );
 830 }
 831
 832 /*****************************************************************************
 833  * SwitchDisplay: VT change signal handler
 834  *****************************************************************************
 835  * This function activates or deactivates the output of the thread. It is
 836  * called by the VT driver, on terminal change.
 837  *****************************************************************************/
 838 static void SwitchDisplay(int i_signal)
 839 {
 840 #if 0
 841     vout_thread_t *p_vout;
 842
 843     vlc_mutex_lock( &p_vout_bank->lock );
 844
 845     /* XXX: only test the first video output */
 846     if( p_vout_bank->i_count )
 847     {
 848         p_vout = p_vout_bank->pp_vout[0];
 849
 850         switch( i_signal )
 851         {
 852         case SIGUSR1:                                /* vt has been released */
 853             p_vout->b_active = 0;
 854             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 855             break;
 856         case SIGUSR2:                                /* vt has been acquired */
 857             p_vout->b_active = 1;
 858             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 859             /* handle blanking */
 860             vlc_mutex_lock( &p_vout->change_lock );
 861             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 862             vlc_mutex_unlock( &p_vout->change_lock );
 863             break;
 864         }
 865     }
 866
 867     vlc_mutex_unlock( &p_vout_bank->lock );
 868 #endif
 869 }
 870
 871 /*****************************************************************************
 872  * TextMode and GfxMode : switch tty to text/graphic mode
 873  *****************************************************************************
 874  * These functions toggle the tty mode.
 875  *****************************************************************************/
 876 static void TextMode( int i_tty )
 877 {
 878     /* return to text mode */
 879     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
 880     {
 881         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
 882     }
 883 }
 884
 885 static void GfxMode( int i_tty )
 886 {
 887     /* switch to graphic mode */
 888     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
 889     {
 890         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
 891     }
 892 }