modules/video_output/fb.c

   1 /*****************************************************************************
   2  * fb.c : framebuffer plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000-2009 VLC authors and VideoLAN
   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 it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <signal.h>                                      /* SIGUSR1, SIGUSR2 */
  34 #include <fcntl.h>                                                 /* open() */
  35 #include <unistd.h>                                               /* close() */
  36 #include <errno.h>
  37 #include <termios.h>                                       /* struct termios */
  38 #include <sys/ioctl.h>
  39 #include <sys/mman.h>                                              /* mmap() */
  40
  41 #include <linux/fb.h>
  42 #include <linux/vt.h>                                                /* VT_* */
  43 #include <linux/kd.h>                                                 /* KD* */
  44
  45 #include <vlc_common.h>
  46 #include <vlc_plugin.h>
  47 #include <vlc_vout_display.h>
  48 #include <vlc_picture_pool.h>
  49 #include <vlc_fs.h>
  50
  51 /*****************************************************************************
  52  * Module descriptor
  53  *****************************************************************************/
  54 #define FB_DEV_VAR "fbdev"
  55
  56 #define DEVICE_TEXT N_("Framebuffer device")
  57 #define DEVICE_LONGTEXT N_(\
  58     "Framebuffer device to use for rendering (usually /dev/fb0).")
  59
  60 #define TTY_TEXT N_("Run fb on current tty")
  61 #define TTY_LONGTEXT N_(\
  62     "Run framebuffer on current TTY device (default enabled). " \
  63     "(disable tty handling with caution)")
  64
  65 #define FB_MODE_TEXT N_("Framebuffer resolution to use")
  66 #define FB_MODE_LONGTEXT N_(\
  67     "Select the resolution for the framebuffer. Currently it supports " \
  68     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)")
  69
  70 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration")
  71 #define HW_ACCEL_LONGTEXT N_("Disable for double buffering in software.")
  72
  73 #define CHROMA_TEXT N_("Image format (default RGB)")
  74 #define CHROMA_LONGTEXT N_("Chroma fourcc used by the framebuffer. Default is RGB since the fb device has no way to report its chroma.")
  75
  76 static int  Open (vlc_object_t *);
  77 static void Close(vlc_object_t *);
  78
  79 vlc_module_begin ()
  80     set_shortname("Framebuffer")
  81     set_category(CAT_VIDEO)
  82     set_subcategory(SUBCAT_VIDEO_VOUT)
  83     add_loadfile(FB_DEV_VAR, "/dev/fb0", DEVICE_TEXT, DEVICE_LONGTEXT,
  84                  false)
  85     add_bool("fb-tty", true, TTY_TEXT, TTY_LONGTEXT, true)
  86     add_string( "fb-chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT, true )
  87     add_obsolete_string("fb-aspect-ratio")
  88     add_integer("fb-mode", 4, FB_MODE_TEXT, FB_MODE_LONGTEXT,
  89                  true)
  90     add_bool("fb-hw-accel", true, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
  91               true)
  92     set_description(N_("GNU/Linux framebuffer video output"))
  93     set_capability("vout display", 30)
  94     set_callbacks(Open, Close)
  95 vlc_module_end ()
  96
  97 /*****************************************************************************
  98  * Local prototypes
  99  *****************************************************************************/
 100 static picture_pool_t *Pool  (vout_display_t *, unsigned);
 101 static void           Display(vout_display_t *, picture_t *, subpicture_t *);
 102 static int            Control(vout_display_t *, int, va_list);
 103
 104 /* */
 105 static int  OpenDisplay  (vout_display_t *, bool force_resolution);
 106 static void CloseDisplay (vout_display_t *);
 107 #if 0
 108 static void SwitchDisplay(int i_signal);
 109 #endif
 110 static void TextMode     (int tty);
 111 static void GfxMode      (int tty);
 112
 113 static int  TtyInit(vout_display_t *);
 114 static void TtyExit(vout_display_t *);
 115
 116 /* */
 117 struct vout_display_sys_t {
 118     /* System information */
 119     int                 tty;                          /* tty device handle */
 120     bool                is_tty;
 121     struct termios      old_termios;
 122
 123     /* Original configuration information */
 124 #if 0
 125     struct sigaction            sig_usr1;           /* USR1 previous handler */
 126     struct sigaction            sig_usr2;           /* USR2 previous handler */
 127 #endif
 128     struct vt_mode              vt_mode;                 /* previous VT mode */
 129
 130     /* Framebuffer information */
 131     int                         fd;                       /* device handle */
 132     struct fb_var_screeninfo    old_info;       /* original mode information */
 133     struct fb_var_screeninfo    var_info;        /* current mode information */
 134     bool                        has_pan;   /* does device supports panning ? */
 135     struct fb_cmap              fb_cmap;                /* original colormap */
 136     uint16_t                    *palette;                /* original palette */
 137     bool                        is_hw_accel;         /* has hardware support */
 138
 139     /* Video information */
 140     uint32_t width;
 141     uint32_t height;
 142     uint32_t line_length;
 143     vlc_fourcc_t chroma;
 144     int      bytes_per_pixel;
 145
 146     /* Video memory */
 147     uint8_t     *video_ptr;                                 /* base address */
 148     size_t      video_size;                                    /* page size */
 149
 150     picture_t       *picture;
 151     picture_pool_t  *pool;
 152 };
 153
 154
 155 static void ClearScreen(vout_display_sys_t *sys)
 156 {
 157     switch (sys->chroma) {
 158     /* XXX: add other chromas */
 159     case VLC_CODEC_UYVY: {
 160         unsigned int j, size = sys->video_size / 4;
 161         uint32_t *ptr = (uint32_t*)((uintptr_t)(sys->video_ptr + 3) & ~3);
 162         for(j=0; j < size; j++)
 163             ptr[j] = 0x10801080;    /* U = V = 16, Y = 128 */
 164         break;
 165     }
 166     default:    /* RGB */
 167         memset(sys->video_ptr, 0, sys->video_size);
 168     }
 169 }
 170
 171 /**
 172  * This function allocates and initializes a FB vout method.
 173  */
 174 static int Open(vlc_object_t *object)
 175 {
 176     vout_display_t     *vd = (vout_display_t *)object;
 177     vout_display_sys_t *sys;
 178
 179     if (vout_display_IsWindowed(vd))
 180         return VLC_EGENERIC;
 181
 182     /* Allocate instance and initialize some members */
 183     vd->sys = sys = calloc(1, sizeof(*sys));
 184     if (!sys)
 185         return VLC_ENOMEM;
 186
 187     /* Does the framebuffer uses hw acceleration? */
 188     sys->is_hw_accel = var_InheritBool(vd, "fb-hw-accel");
 189
 190     /* Set tty and fb devices */
 191     sys->tty = 0; /* 0 == /dev/tty0 == current console */
 192     sys->is_tty = var_InheritBool(vd, "fb-tty");
 193 #if !defined(_WIN32) &&  defined(HAVE_ISATTY)
 194     /* Check that stdin is a TTY */
 195     if (sys->is_tty && !isatty(0)) {
 196         msg_Warn(vd, "standard input is not a TTY");
 197         free(sys);
 198         return VLC_EGENERIC;
 199     }
 200     msg_Warn(vd, "disabling TTY handling, use with caution because "
 201                  "there is no way to return to the TTY");
 202 #endif
 203
 204     const int mode = var_InheritInteger(vd, "fb-mode");
 205     bool force_resolution = true;
 206     switch (mode) {
 207     case 0: /* QCIF */
 208         sys->width  = 176;
 209         sys->height = 144;
 210         break;
 211     case 1: /* CIF */
 212         sys->width  = 352;
 213         sys->height = 288;
 214         break;
 215     case 2: /* NTSC */
 216         sys->width  = 640;
 217         sys->height = 480;
 218         break;
 219     case 3: /* PAL */
 220         sys->width  = 704;
 221         sys->height = 576;
 222         break;
 223     case 4:
 224     default:
 225         force_resolution = false;
 226         break;
 227     }
 228
 229     char *chroma = var_InheritString(vd, "fb-chroma");
 230     if (chroma) {
 231         sys->chroma = vlc_fourcc_GetCodecFromString(VIDEO_ES, chroma);
 232
 233         if (sys->chroma)
 234             msg_Dbg(vd, "forcing chroma '%s'", chroma);
 235         else
 236             msg_Warn(vd, "chroma %s invalid, using default", chroma);
 237
 238         free(chroma);
 239     } else
 240         sys->chroma = 0;
 241
 242     /* tty handling */
 243     if (sys->is_tty && TtyInit(vd)) {
 244         free(sys);
 245         return VLC_EGENERIC;
 246     }
 247
 248     /* */
 249     sys->video_ptr = MAP_FAILED;
 250     sys->picture = NULL;
 251     sys->pool = NULL;
 252
 253     if (OpenDisplay(vd, force_resolution)) {
 254         Close(VLC_OBJECT(vd));
 255         return VLC_EGENERIC;
 256     }
 257
 258     /* */
 259     video_format_t fmt;
 260     video_format_ApplyRotation(&fmt, &vd->fmt);
 261
 262     if (sys->chroma) {
 263         fmt.i_chroma = sys->chroma;
 264     } else {
 265         /* Assume RGB */
 266
 267         msg_Dbg(vd, "%d bppd", sys->var_info.bits_per_pixel);
 268         switch (sys->var_info.bits_per_pixel) {
 269         case 8: /* FIXME: set the palette */
 270             fmt.i_chroma = VLC_CODEC_RGB8;
 271             break;
 272         case 15:
 273             fmt.i_chroma = VLC_CODEC_RGB15;
 274             break;
 275         case 16:
 276             fmt.i_chroma = VLC_CODEC_RGB16;
 277             break;
 278         case 24:
 279             fmt.i_chroma = VLC_CODEC_RGB24;
 280             break;
 281         case 32:
 282             fmt.i_chroma = VLC_CODEC_RGB32;
 283             break;
 284         default:
 285             msg_Err(vd, "unknown screendepth %i", sys->var_info.bits_per_pixel);
 286             Close(VLC_OBJECT(vd));
 287             return VLC_EGENERIC;
 288         }
 289         if (sys->var_info.bits_per_pixel != 8) {
 290             fmt.i_rmask = ((1 << sys->var_info.red.length) - 1)
 291                                  << sys->var_info.red.offset;
 292             fmt.i_gmask = ((1 << sys->var_info.green.length) - 1)
 293                                  << sys->var_info.green.offset;
 294             fmt.i_bmask = ((1 << sys->var_info.blue.length) - 1)
 295                                  << sys->var_info.blue.offset;
 296         }
 297     }
 298
 299     fmt.i_visible_width  = sys->width;
 300     fmt.i_visible_height = sys->height;
 301
 302     /* */
 303     vout_display_info_t info = vd->info;
 304     info.has_hide_mouse = true;
 305
 306     /* */
 307     vd->fmt     = fmt;
 308     vd->info    = info;
 309     vd->pool    = Pool;
 310     vd->prepare = NULL;
 311     vd->display = Display;
 312     vd->control = Control;
 313     vd->manage  = NULL;
 314
 315     /* */
 316     vout_display_SendEventFullscreen(vd, true);
 317     vout_display_SendEventDisplaySize(vd, fmt.i_visible_width, fmt.i_visible_height);
 318     return VLC_SUCCESS;
 319 }
 320
 321 /**
 322  * Terminate an output method created by Open
 323  */
 324 static void Close(vlc_object_t *object)
 325 {
 326     vout_display_t *vd = (vout_display_t *)object;
 327     vout_display_sys_t *sys = vd->sys;
 328
 329     if (sys->pool)
 330         picture_pool_Release(sys->pool);
 331     if (!sys->is_hw_accel && sys->picture)
 332         picture_Release(sys->picture);
 333
 334     CloseDisplay(vd);
 335
 336     if (sys->is_tty)
 337         TtyExit(vd);
 338
 339     free(sys);
 340 }
 341
 342 /* */
 343 static picture_pool_t *Pool(vout_display_t *vd, unsigned count)
 344 {
 345     vout_display_sys_t *sys = vd->sys;
 346
 347     if (!sys->pool) {
 348         if (!sys->picture) {
 349             picture_resource_t rsc;
 350
 351             memset(&rsc, 0, sizeof(rsc));
 352             rsc.p[0].p_pixels = sys->video_ptr;
 353             rsc.p[0].i_lines  = sys->var_info.yres;
 354             rsc.p[0].i_pitch = sys->line_length;
 355
 356             sys->picture = picture_NewFromResource(&vd->fmt, &rsc);
 357             if (!sys->picture)
 358                 return NULL;
 359         }
 360
 361         if (sys->is_hw_accel)
 362             sys->pool = picture_pool_New(1, &sys->picture);
 363         else
 364             sys->pool = picture_pool_NewFromFormat(&vd->fmt, count);
 365     }
 366     return sys->pool;
 367 }
 368 static void Display(vout_display_t *vd, picture_t *picture, subpicture_t *subpicture)
 369 {
 370     vout_display_sys_t *sys = vd->sys;
 371
 372     /* swap the two Y offsets if the drivers supports panning */
 373     if (sys->has_pan) {
 374         sys->var_info.yoffset = 0;
 375         /*vd->sys->var_info.yoffset = vd->sys->var_info.yres; */
 376
 377         /* the X offset should be 0, but who knows ...
 378          * some other app might have played with the framebuffer */
 379         sys->var_info.xoffset = 0;
 380
 381         /* FIXME 'static' is damn wrong and it's dead code ... */
 382         static int panned = 0;
 383         if (panned < 0) {
 384             ioctl(sys->fd, FBIOPAN_DISPLAY, &sys->var_info);
 385             panned++;
 386         }
 387     }
 388
 389     if (!sys->is_hw_accel)
 390         picture_Copy(sys->picture, picture);
 391
 392     picture_Release(picture);
 393     VLC_UNUSED(subpicture);
 394 }
 395 static int Control(vout_display_t *vd, int query, va_list args)
 396 {
 397     (void) vd; (void) query; (void) args;
 398     return VLC_EGENERIC;
 399 }
 400
 401 /* following functions are local */
 402 static int TtyInit(vout_display_t *vd)
 403 {
 404     vout_display_sys_t *sys = vd->sys;
 405
 406     struct termios new_termios;
 407
 408     GfxMode(sys->tty);
 409
 410     /* Set keyboard settings */
 411     if (tcgetattr(0, &sys->old_termios) == -1) {
 412         msg_Err(vd, "tcgetattr failed");
 413     }
 414
 415     if (tcgetattr(0, &new_termios) == -1) {
 416         msg_Err(vd, "tcgetattr failed");
 417     }
 418
 419     /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 420     new_termios.c_lflag |= (ECHO | ECHOCTL); */
 421     new_termios.c_lflag &= ~ (ICANON);
 422     new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 423     new_termios.c_iflag = 0;
 424     new_termios.c_cc[VMIN] = 1;
 425     new_termios.c_cc[VTIME] = 0;
 426
 427     if (tcsetattr(0, TCSAFLUSH, &new_termios) == -1) {
 428         msg_Err(vd, "tcsetattr failed");
 429     }
 430
 431     ioctl(sys->tty, VT_RELDISP, VT_ACKACQ);
 432
 433 #if 0
 434     /* Set-up tty signal handler to be aware of tty changes */
 435     struct sigaction sig_tty;
 436     memset(&sig_tty, 0, sizeof(sig_tty));
 437     sig_tty.sa_handler = SwitchDisplay;
 438     sigemptyset(&sig_tty.sa_mask);
 439     if (sigaction(SIGUSR1, &sig_tty, &sys->sig_usr1) ||
 440         sigaction(SIGUSR2, &sig_tty, &sys->sig_usr2)) {
 441         msg_Err(vd, "cannot set signal handler (%s)", vlc_strerror_c(errno));
 442         /* FIXME SIGUSR1 could have succeed */
 443         goto error_signal;
 444     }
 445 #endif
 446
 447     /* Set-up tty according to new signal handler */
 448     if (-1 == ioctl(sys->tty, VT_GETMODE, &sys->vt_mode)) {
 449         msg_Err(vd, "cannot get terminal mode (%s)", vlc_strerror_c(errno));
 450         goto error;
 451     }
 452     struct vt_mode vt_mode = sys->vt_mode;
 453     vt_mode.mode   = VT_PROCESS;
 454     vt_mode.waitv  = 0;
 455     vt_mode.relsig = SIGUSR1;
 456     vt_mode.acqsig = SIGUSR2;
 457
 458     if (-1 == ioctl(sys->tty, VT_SETMODE, &vt_mode)) {
 459         msg_Err(vd, "cannot set terminal mode (%s)", vlc_strerror_c(errno));
 460         goto error;
 461     }
 462     return VLC_SUCCESS;
 463
 464 error:
 465 #if 0
 466     sigaction(SIGUSR1, &sys->sig_usr1, NULL);
 467     sigaction(SIGUSR2, &sys->sig_usr2, NULL);
 468 error_signal:
 469 #endif
 470     tcsetattr(0, 0, &sys->old_termios);
 471     TextMode(sys->tty);
 472     return VLC_EGENERIC;
 473 }
 474 static void TtyExit(vout_display_t *vd)
 475 {
 476     vout_display_sys_t *sys = vd->sys;
 477
 478     /* Reset the terminal */
 479     ioctl(sys->tty, VT_SETMODE, &sys->vt_mode);
 480
 481 #if 0
 482     /* Remove signal handlers */
 483     sigaction(SIGUSR1, &sys->sig_usr1, NULL);
 484     sigaction(SIGUSR2, &sys->sig_usr2, NULL);
 485 #endif
 486
 487     /* Reset the keyboard state */
 488     tcsetattr(0, 0, &sys->old_termios);
 489
 490     /* Return to text mode */
 491     TextMode(sys->tty);
 492 }
 493
 494 /*****************************************************************************
 495  * OpenDisplay: initialize framebuffer
 496  *****************************************************************************/
 497 static int OpenDisplay(vout_display_t *vd, bool force_resolution)
 498 {
 499     vout_display_sys_t *sys = vd->sys;
 500     char *psz_device;                             /* framebuffer device path */
 501
 502     /* Open framebuffer device */
 503     if (!(psz_device = var_InheritString(vd, FB_DEV_VAR))) {
 504         msg_Err(vd, "don't know which fb device to open");
 505         return VLC_EGENERIC;
 506     }
 507
 508     sys->fd = vlc_open(psz_device, O_RDWR);
 509     if (sys->fd == -1) {
 510         msg_Err(vd, "cannot open %s (%s)", psz_device, vlc_strerror_c(errno));
 511         free(psz_device);
 512         return VLC_EGENERIC;
 513     }
 514     free(psz_device);
 515
 516     /* Get framebuffer device information */
 517     if (ioctl(sys->fd, FBIOGET_VSCREENINFO, &sys->var_info)) {
 518         msg_Err(vd, "cannot get fb info (%s)", vlc_strerror_c(errno));
 519         close(sys->fd);
 520         return VLC_EGENERIC;
 521     }
 522     sys->old_info = sys->var_info;
 523
 524     /* Get some info on the framebuffer itself */
 525     if (force_resolution) {
 526         sys->var_info.xres = sys->var_info.xres_virtual = sys->width;
 527         sys->var_info.yres = sys->var_info.yres_virtual = sys->height;
 528     }
 529
 530     /* Set some attributes */
 531     sys->var_info.activate = sys->is_tty ? FB_ACTIVATE_NXTOPEN :
 532                                            FB_ACTIVATE_NOW;
 533     sys->var_info.xoffset  =  0;
 534     sys->var_info.yoffset  =  0;
 535
 536     if (ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->var_info)) {
 537         msg_Err(vd, "cannot set fb info (%s)", vlc_strerror_c(errno));
 538         close(sys->fd);
 539         return VLC_EGENERIC;
 540     }
 541
 542     struct fb_fix_screeninfo fix_info;
 543     /* Get some information again, in the definitive configuration */
 544     if (ioctl(sys->fd, FBIOGET_FSCREENINFO, &fix_info) ||
 545         ioctl(sys->fd, FBIOGET_VSCREENINFO, &sys->var_info)) {
 546         msg_Err(vd, "cannot get additional fb info (%s)",
 547                 vlc_strerror_c(errno));
 548
 549         /* Restore fb config */
 550         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 551
 552         close(sys->fd);
 553         return VLC_EGENERIC;
 554     }
 555
 556     /* If the fb has limitations on mode change,
 557      * then keep the resolution of the fb */
 558     if ((sys->height != sys->var_info.yres) ||
 559         (sys->width != sys->var_info.xres)) {
 560         msg_Warn(vd,
 561                  "using framebuffer native resolution instead of requested (%ix%i)",
 562                  sys->width, sys->height);
 563     }
 564     sys->height = sys->var_info.yres;
 565     sys->width  = sys->var_info.xres_virtual ? sys->var_info.xres_virtual :
 566                                                sys->var_info.xres;
 567     sys->line_length = fix_info.line_length;
 568
 569     /* FIXME: if the image is full-size, it gets cropped on the left
 570      * because of the xres / xres_virtual slight difference */
 571     msg_Dbg(vd, "%ix%i (virtual %ix%i) (request %ix%i)",
 572             sys->var_info.xres, sys->var_info.yres,
 573             sys->var_info.xres_virtual,
 574             sys->var_info.yres_virtual,
 575             sys->width, sys->height);
 576
 577     sys->palette = NULL;
 578     sys->has_pan = (fix_info.ypanstep || fix_info.ywrapstep);
 579
 580     switch (sys->var_info.bits_per_pixel) {
 581     case 8:
 582         sys->palette = malloc(4 * 256 * sizeof(uint16_t));
 583         if (!sys->palette) {
 584             /* Restore fb config */
 585             ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 586
 587             close(sys->fd);
 588             return VLC_ENOMEM;
 589         }
 590         sys->fb_cmap.start = 0;
 591         sys->fb_cmap.len = 256;
 592         sys->fb_cmap.red = sys->palette;
 593         sys->fb_cmap.green = sys->palette + 256;
 594         sys->fb_cmap.blue = sys->palette + 2 * 256;
 595         sys->fb_cmap.transp = sys->palette + 3 * 256;
 596
 597         /* Save the colormap */
 598         ioctl(sys->fd, FBIOGETCMAP, &sys->fb_cmap);
 599
 600         sys->bytes_per_pixel = 1;
 601         break;
 602
 603     case 15:
 604     case 16:
 605         sys->bytes_per_pixel = 2;
 606         break;
 607
 608     case 24:
 609         sys->bytes_per_pixel = 3;
 610         break;
 611
 612     case 32:
 613         sys->bytes_per_pixel = 4;
 614         break;
 615
 616     default:
 617         msg_Err(vd, "screen depth %d is not supported",
 618                 sys->var_info.bits_per_pixel);
 619
 620         /* Restore fb config */
 621         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 622
 623         close(sys->fd);
 624         return VLC_EGENERIC;
 625     }
 626
 627     sys->video_size = sys->line_length * sys->var_info.yres_virtual;
 628
 629     /* Map a framebuffer at the beginning */
 630     sys->video_ptr = mmap(NULL, sys->video_size,
 631                           PROT_READ | PROT_WRITE, MAP_SHARED, sys->fd, 0);
 632
 633     if (sys->video_ptr == MAP_FAILED) {
 634         msg_Err(vd, "cannot map video memory (%s)", vlc_strerror_c(errno));
 635
 636         if (sys->var_info.bits_per_pixel == 8) {
 637             free(sys->palette);
 638             sys->palette = NULL;
 639         }
 640
 641         /* Restore fb config */
 642         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 643
 644         close(sys->fd);
 645         return VLC_EGENERIC;
 646     }
 647
 648     ClearScreen(sys);
 649
 650     msg_Dbg(vd,
 651             "framebuffer type=%d, visual=%d, ypanstep=%d, ywrap=%d, accel=%d",
 652             fix_info.type, fix_info.visual,
 653             fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel);
 654     return VLC_SUCCESS;
 655 }
 656
 657 /*****************************************************************************
 658  * CloseDisplay: terminate FB video thread output method
 659  *****************************************************************************/
 660 static void CloseDisplay(vout_display_t *vd)
 661 {
 662     vout_display_sys_t *sys = vd->sys;
 663
 664     if (sys->video_ptr != MAP_FAILED) {
 665         ClearScreen(sys);
 666         munmap(sys->video_ptr, sys->video_size);
 667     }
 668
 669     if (sys->fd >= 0) {
 670         /* Restore palette */
 671         if (sys->var_info.bits_per_pixel == 8) {
 672             ioctl(sys->fd, FBIOPUTCMAP, &sys->fb_cmap);
 673             free(sys->palette);
 674             sys->palette = NULL;
 675         }
 676
 677         /* Restore fb config */
 678         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 679
 680         /* Close fb */
 681         close(sys->fd);
 682     }
 683 }
 684
 685 #if 0
 686 /*****************************************************************************
 687  * SwitchDisplay: VT change signal handler
 688  *****************************************************************************
 689  * This function activates or deactivates the output of the thread. It is
 690  * called by the VT driver, on terminal change.
 691  *****************************************************************************/
 692 static void SwitchDisplay(int i_signal)
 693 {
 694     vout_display_t *vd;
 695
 696     vlc_mutex_lock(&p_vout_bank->lock);
 697
 698     /* XXX: only test the first video output */
 699     if (p_vout_bank->i_count)
 700     {
 701         vd = p_vout_bank->pp_vout[0];
 702
 703         switch (i_signal)
 704         {
 705         case SIGUSR1:                                /* vt has been released */
 706             vd->b_active = 0;
 707             ioctl(sys->tty, VT_RELDISP, 1);
 708             break;
 709         case SIGUSR2:                                /* vt has been acquired */
 710             vd->b_active = 1;
 711             ioctl(sys->tty, VT_RELDISP, VT_ACTIVATE);
 712             /* handle blanking */
 713             vlc_mutex_lock(&vd->change_lock);
 714             vd->i_changes |= VOUT_SIZE_CHANGE;
 715             vlc_mutex_unlock(&vd->change_lock);
 716             break;
 717         }
 718     }
 719
 720     vlc_mutex_unlock(&p_vout_bank->lock);
 721 }
 722 #endif
 723
 724 /*****************************************************************************
 725  * TextMode and GfxMode : switch tty to text/graphic mode
 726  *****************************************************************************
 727  * These functions toggle the tty mode.
 728  *****************************************************************************/
 729 static void TextMode(int tty)
 730 {
 731     /* return to text mode */
 732     if (-1 == ioctl(tty, KDSETMODE, KD_TEXT)) {
 733         /*msg_Err(vd, "failed ioctl KDSETMODE KD_TEXT");*/
 734     }
 735 }
 736
 737 static void GfxMode(int tty)
 738 {
 739     /* switch to graphic mode */
 740     if (-1 == ioctl(tty, KDSETMODE, KD_GRAPHICS)) {
 741         /*msg_Err(vd, "failed ioctl KDSETMODE KD_GRAPHICS");*/
 742     }
 743 }