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