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