modules/video_output/fb.c

   1 /*****************************************************************************
   2  * fb.c : framebuffer plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000-2009 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
  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
  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_(\
  72     "If your framebuffer supports hardware acceleration or does double buffering " \
  73     "in hardware then you must disable this option. It then does double buffering " \
  74     "in software.")
  75
  76 #define CHROMA_TEXT N_("Image format (default RGB)")
  77 #define CHROMA_LONGTEXT N_("Chroma fourcc used by the framebuffer. Default is RGB since the fb device has no way to report its chroma.")
  78
  79 static int  Open (vlc_object_t *);
  80 static void Close(vlc_object_t *);
  81
  82 vlc_module_begin ()
  83     set_shortname("Framebuffer")
  84     set_category(CAT_VIDEO)
  85     set_subcategory(SUBCAT_VIDEO_VOUT)
  86     add_loadfile(FB_DEV_VAR, "/dev/fb0", DEVICE_TEXT, DEVICE_LONGTEXT,
  87                  false)
  88     add_bool("fb-tty", true, NULL, TTY_TEXT, TTY_LONGTEXT, true)
  89     add_string( "fb-chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT, true )
  90     add_obsolete_string("fb-aspect-ratio")
  91     add_integer("fb-mode", 4, FB_MODE_TEXT, FB_MODE_LONGTEXT,
  92                  true)
  93     add_bool("fb-hw-accel", true, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
  94               true)
  95     set_description(N_("GNU/Linux framebuffer video output"))
  96     set_capability("vout display", 30)
  97     set_callbacks(Open, Close)
  98 vlc_module_end ()
  99
 100 /*****************************************************************************
 101  * Local prototypes
 102  *****************************************************************************/
 103 static picture_pool_t *Pool  (vout_display_t *, unsigned);
 104 static void           Display(vout_display_t *, picture_t *);
 105 static int            Control(vout_display_t *, int, va_list);
 106 static void           Manage (vout_display_t *);
 107
 108 /* */
 109 static int  OpenDisplay  (vout_display_t *, bool force_resolution);
 110 static void CloseDisplay (vout_display_t *);
 111 #if 0
 112 static void SwitchDisplay(int i_signal);
 113 #endif
 114 static void TextMode     (int tty);
 115 static void GfxMode      (int tty);
 116
 117 static int  TtyInit(vout_display_t *);
 118 static void TtyExit(vout_display_t *);
 119
 120 /* */
 121 struct vout_display_sys_t {
 122     /* System information */
 123     int                 tty;                          /* tty device handle */
 124     bool                is_tty;
 125     struct termios      old_termios;
 126
 127     /* Original configuration information */
 128 #if 0
 129     struct sigaction            sig_usr1;           /* USR1 previous handler */
 130     struct sigaction            sig_usr2;           /* USR2 previous handler */
 131 #endif
 132     struct vt_mode              vt_mode;                 /* previous VT mode */
 133
 134     /* Framebuffer information */
 135     int                         fd;                       /* device handle */
 136     struct fb_var_screeninfo    old_info;       /* original mode information */
 137     struct fb_var_screeninfo    var_info;        /* current mode information */
 138     bool                        has_pan;   /* does device supports panning ? */
 139     struct fb_cmap              fb_cmap;                /* original colormap */
 140     uint16_t                    *palette;                /* original palette */
 141     bool                        is_hw_accel;         /* has hardware support */
 142
 143     /* Video information */
 144     uint32_t width;
 145     uint32_t height;
 146     uint32_t line_length;
 147     vlc_fourcc_t chroma;
 148     int      bytes_per_pixel;
 149
 150     /* Video memory */
 151     uint8_t     *video_ptr;                                 /* base address */
 152     size_t      video_size;                                    /* page size */
 153
 154     picture_t       *picture;
 155     picture_pool_t  *pool;
 156 };
 157
 158
 159 static void ClearScreen(vout_display_sys_t *sys)
 160 {
 161     switch (sys->chroma) {
 162     /* XXX: add other chromas */
 163     case VLC_CODEC_UYVY: {
 164         unsigned int j, size = sys->video_size / 4;
 165         uint32_t *ptr = (uint32_t*)((uintptr_t)(sys->video_ptr + 3) & ~3);
 166         for(j=0; j < size; j++)
 167             ptr[j] = 0x10801080;    /* U = V = 16, Y = 128 */
 168         break;
 169     }
 170     default:    /* RGB */
 171         memset(sys->video_ptr, 0, sys->video_size);
 172     }
 173 }
 174
 175 /**
 176  * This function allocates and initializes a FB vout method.
 177  */
 178 static int Open(vlc_object_t *object)
 179 {
 180     vout_display_t     *vd = (vout_display_t *)object;
 181     vout_display_sys_t *sys;
 182
 183     /* Allocate instance and initialize some members */
 184     vd->sys = sys = calloc(1, sizeof(*sys));
 185     if (!sys)
 186         return VLC_ENOMEM;
 187
 188     /* Does the framebuffer uses hw acceleration? */
 189     sys->is_hw_accel = var_CreateGetBool(vd, "fb-hw-accel");
 190
 191     /* Set tty and fb devices */
 192     sys->tty = 0; /* 0 == /dev/tty0 == current console */
 193     sys->is_tty = var_CreateGetBool(vd, "fb-tty");
 194 #if !defined(WIN32) &&  defined(HAVE_ISATTY)
 195     /* Check that stdin is a TTY */
 196     if (sys->is_tty && !isatty(0)) {
 197         msg_Warn(vd, "standard input is not a TTY");
 198         free(sys);
 199         return VLC_EGENERIC;
 200     }
 201     msg_Warn(vd, "disabling TTY handling, use with caution because "
 202                  "there is no way to return to the TTY");
 203 #endif
 204
 205     const int mode = var_CreateGetInteger(vd, "fb-mode");
 206     bool force_resolution = true;
 207     switch (mode) {
 208     case 0: /* QCIF */
 209         sys->width  = 176;
 210         sys->height = 144;
 211         break;
 212     case 1: /* CIF */
 213         sys->width  = 352;
 214         sys->height = 288;
 215         break;
 216     case 2: /* NTSC */
 217         sys->width  = 640;
 218         sys->height = 480;
 219         break;
 220     case 3: /* PAL */
 221         sys->width  = 704;
 222         sys->height = 576;
 223         break;
 224     case 4:
 225     default:
 226         force_resolution = false;
 227         break;
 228     }
 229
 230     char *chroma = var_CreateGetNonEmptyString(vd, "fb-chroma");
 231     if (chroma) {
 232         sys->chroma = vlc_fourcc_GetCodecFromString(VIDEO_ES, chroma);
 233
 234         if (sys->chroma)
 235             msg_Dbg(vd, "forcing chroma '%s'", chroma);
 236         else
 237             msg_Warn(vd, "chroma %s invalid, using default", chroma);
 238
 239         free(chroma);
 240     } else
 241         sys->chroma = 0;
 242
 243     /* tty handling */
 244     if (sys->is_tty && TtyInit(vd)) {
 245         free(sys);
 246         return VLC_EGENERIC;
 247     }
 248
 249     /* */
 250     sys->video_ptr = MAP_FAILED;
 251     sys->picture = NULL;
 252     sys->pool = NULL;
 253
 254     if (OpenDisplay(vd, force_resolution)) {
 255         Close(VLC_OBJECT(vd));
 256         return VLC_EGENERIC;
 257     }
 258     vout_display_DeleteWindow(vd, NULL);
 259
 260     /* */
 261     video_format_t fmt = vd->fmt;
 262
 263     if (sys->chroma) {
 264         fmt.i_chroma = sys->chroma;
 265     } else {
 266         /* Assume RGB */
 267
 268         msg_Dbg(vd, "%d bppd", sys->var_info.bits_per_pixel);
 269         switch (sys->var_info.bits_per_pixel) {
 270         case 8: /* FIXME: set the palette */
 271             fmt.i_chroma = VLC_CODEC_RGB8;
 272             break;
 273         case 15:
 274             fmt.i_chroma = VLC_CODEC_RGB15;
 275             break;
 276         case 16:
 277             fmt.i_chroma = VLC_CODEC_RGB16;
 278             break;
 279         case 24:
 280             fmt.i_chroma = VLC_CODEC_RGB24;
 281             break;
 282         case 32:
 283             fmt.i_chroma = VLC_CODEC_RGB32;
 284             break;
 285         default:
 286             msg_Err(vd, "unknown screendepth %i", sys->var_info.bits_per_pixel);
 287             Close(VLC_OBJECT(vd));
 288             return VLC_EGENERIC;
 289         }
 290         if (sys->var_info.bits_per_pixel != 8) {
 291             fmt.i_rmask = ((1 << sys->var_info.red.length) - 1)
 292                                  << sys->var_info.red.offset;
 293             fmt.i_gmask = ((1 << sys->var_info.green.length) - 1)
 294                                  << sys->var_info.green.offset;
 295             fmt.i_bmask = ((1 << sys->var_info.blue.length) - 1)
 296                                  << sys->var_info.blue.offset;
 297         }
 298     }
 299
 300     fmt.i_width  = sys->width;
 301     fmt.i_height = sys->height;
 302
 303     /* */
 304     vout_display_info_t info = vd->info;
 305     info.has_hide_mouse = true;
 306
 307     /* */
 308     vd->fmt     = fmt;
 309     vd->info    = info;
 310     vd->pool    = Pool;
 311     vd->prepare = NULL;
 312     vd->display = Display;
 313     vd->control = Control;
 314     vd->manage  = Manage;
 315
 316     /* */
 317     vout_display_SendEventFullscreen(vd, true);
 318     vout_display_SendEventDisplaySize(vd, fmt.i_width, fmt.i_height, true);
 319     return VLC_SUCCESS;
 320 }
 321
 322 /**
 323  * Terminate an output method created by Open
 324  */
 325 static void Close(vlc_object_t *object)
 326 {
 327     vout_display_t *vd = (vout_display_t *)object;
 328     vout_display_sys_t *sys = vd->sys;
 329
 330     if (sys->pool)
 331         picture_pool_Delete(sys->pool);
 332     if (!sys->is_hw_accel && sys->picture)
 333         picture_Release(sys->picture);
 334
 335     CloseDisplay(vd);
 336
 337     if (sys->is_tty)
 338         TtyExit(vd);
 339
 340     free(sys);
 341 }
 342
 343 /* */
 344 static picture_pool_t *Pool(vout_display_t *vd, unsigned count)
 345 {
 346     vout_display_sys_t *sys = vd->sys;
 347
 348     if (!sys->pool) {
 349         if (!sys->picture) {
 350             picture_resource_t rsc;
 351
 352             memset(&rsc, 0, sizeof(rsc));
 353             rsc.p[0].p_pixels = sys->video_ptr;
 354             rsc.p[0].i_lines  = sys->var_info.yres;
 355             rsc.p[0].i_pitch = sys->line_length;
 356
 357             sys->picture = picture_NewFromResource(&vd->fmt, &rsc);
 358             if (!sys->picture)
 359                 return NULL;
 360         }
 361
 362         if (sys->is_hw_accel)
 363             sys->pool = picture_pool_New(1, &sys->picture);
 364         else
 365             sys->pool = picture_pool_NewFromFormat(&vd->fmt, count);
 366     }
 367     return sys->pool;
 368 }
 369 static void Display(vout_display_t *vd, picture_t *picture)
 370 {
 371     vout_display_sys_t *sys = vd->sys;
 372
 373     /* swap the two Y offsets if the drivers supports panning */
 374     if (sys->has_pan) {
 375         sys->var_info.yoffset = 0;
 376         /*vd->sys->var_info.yoffset = vd->sys->var_info.yres; */
 377
 378         /* the X offset should be 0, but who knows ...
 379          * some other app might have played with the framebuffer */
 380         sys->var_info.xoffset = 0;
 381
 382         /* FIXME 'static' is damn wrong and it's dead code ... */
 383         static int panned = 0;
 384         if (panned < 0) {
 385             ioctl(sys->fd, FBIOPAN_DISPLAY, &sys->var_info);
 386             panned++;
 387         }
 388     }
 389
 390     if (!sys->is_hw_accel)
 391         picture_Copy(sys->picture, picture);
 392
 393     picture_Release(picture);
 394 }
 395 static int Control(vout_display_t *vd, int query, va_list args)
 396 {
 397     vout_display_sys_t *sys = vd->sys;
 398
 399     switch (query) {
 400     case VOUT_DISPLAY_CHANGE_DISPLAY_SIZE: {
 401         const vout_display_cfg_t *cfg = va_arg(args, const vout_display_cfg_t *);
 402         if (cfg->display.width  != sys->width ||
 403             cfg->display.height != sys->height)
 404             return VLC_EGENERIC;
 405         return VLC_SUCCESS;
 406     }
 407     default:
 408         msg_Err(vd, "Unsupported query in vout display fb");
 409         return VLC_EGENERIC;
 410     }
 411 }
 412 static void Manage (vout_display_t *vd)
 413 {
 414     VLC_UNUSED(vd);
 415 #if 0
 416     /*
 417      * Size change
 418      */
 419     if (vd->i_changes & VOUT_SIZE_CHANGE)
 420     {
 421         msg_Dbg(vd, "reinitializing framebuffer screen");
 422         vd->i_changes &= ~VOUT_SIZE_CHANGE;
 423
 424         vout_display_SendEventDisplaySize();
 425
 426         ClearScreen(vd->sys);
 427     }
 428 #endif
 429 }
 430
 431 /* following functions are local */
 432 static int TtyInit(vout_display_t *vd)
 433 {
 434     vout_display_sys_t *sys = vd->sys;
 435
 436     struct termios new_termios;
 437
 438     GfxMode(sys->tty);
 439
 440     /* Set keyboard settings */
 441     if (tcgetattr(0, &sys->old_termios) == -1) {
 442         msg_Err(vd, "tcgetattr failed");
 443     }
 444
 445     if (tcgetattr(0, &new_termios) == -1) {
 446         msg_Err(vd, "tcgetattr failed");
 447     }
 448
 449     /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 450     new_termios.c_lflag |= (ECHO | ECHOCTL); */
 451     new_termios.c_lflag &= ~ (ICANON);
 452     new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 453     new_termios.c_iflag = 0;
 454     new_termios.c_cc[VMIN] = 1;
 455     new_termios.c_cc[VTIME] = 0;
 456
 457     if (tcsetattr(0, TCSAFLUSH, &new_termios) == -1) {
 458         msg_Err(vd, "tcsetattr failed");
 459     }
 460
 461     ioctl(sys->tty, VT_RELDISP, VT_ACKACQ);
 462
 463 #if 0
 464     /* Set-up tty signal handler to be aware of tty changes */
 465     struct sigaction sig_tty;
 466     memset(&sig_tty, 0, sizeof(sig_tty));
 467     sig_tty.sa_handler = SwitchDisplay;
 468     sigemptyset(&sig_tty.sa_mask);
 469     if (sigaction(SIGUSR1, &sig_tty, &sys->sig_usr1) ||
 470         sigaction(SIGUSR2, &sig_tty, &sys->sig_usr2)) {
 471         msg_Err(vd, "cannot set signal handler (%m)");
 472         /* FIXME SIGUSR1 could have succeed */
 473         goto error_signal;
 474     }
 475 #endif
 476
 477     /* Set-up tty according to new signal handler */
 478     if (-1 == ioctl(sys->tty, VT_GETMODE, &sys->vt_mode)) {
 479         msg_Err(vd, "cannot get terminal mode (%m)");
 480         goto error;
 481     }
 482     struct vt_mode vt_mode = sys->vt_mode;
 483     vt_mode.mode   = VT_PROCESS;
 484     vt_mode.waitv  = 0;
 485     vt_mode.relsig = SIGUSR1;
 486     vt_mode.acqsig = SIGUSR2;
 487
 488     if (-1 == ioctl(sys->tty, VT_SETMODE, &vt_mode)) {
 489         msg_Err(vd, "cannot set terminal mode (%m)");
 490         goto error;
 491     }
 492     return VLC_SUCCESS;
 493
 494 error:
 495 #if 0
 496     sigaction(SIGUSR1, &sys->sig_usr1, NULL);
 497     sigaction(SIGUSR2, &sys->sig_usr2, NULL);
 498 error_signal:
 499 #endif
 500     tcsetattr(0, 0, &sys->old_termios);
 501     TextMode(sys->tty);
 502     return VLC_EGENERIC;
 503 }
 504 static void TtyExit(vout_display_t *vd)
 505 {
 506     vout_display_sys_t *sys = vd->sys;
 507
 508     /* Reset the terminal */
 509     ioctl(sys->tty, VT_SETMODE, &sys->vt_mode);
 510
 511 #if 0
 512     /* Remove signal handlers */
 513     sigaction(SIGUSR1, &sys->sig_usr1, NULL);
 514     sigaction(SIGUSR2, &sys->sig_usr2, NULL);
 515 #endif
 516
 517     /* Reset the keyboard state */
 518     tcsetattr(0, 0, &sys->old_termios);
 519
 520     /* Return to text mode */
 521     TextMode(sys->tty);
 522 }
 523
 524 /*****************************************************************************
 525  * OpenDisplay: initialize framebuffer
 526  *****************************************************************************/
 527 static int OpenDisplay(vout_display_t *vd, bool force_resolution)
 528 {
 529     vout_display_sys_t *sys = vd->sys;
 530     char *psz_device;                             /* framebuffer device path */
 531
 532     /* Open framebuffer device */
 533     if (!(psz_device = var_InheritString(vd, FB_DEV_VAR))) {
 534         msg_Err(vd, "don't know which fb device to open");
 535         return VLC_EGENERIC;
 536     }
 537
 538     sys->fd = vlc_open(psz_device, O_RDWR);
 539     if (sys->fd == -1) {
 540         msg_Err(vd, "cannot open %s (%m)", psz_device);
 541         free(psz_device);
 542         return VLC_EGENERIC;
 543     }
 544     free(psz_device);
 545
 546     /* Get framebuffer device information */
 547     if (ioctl(sys->fd, FBIOGET_VSCREENINFO, &sys->var_info)) {
 548         msg_Err(vd, "cannot get fb info (%m)");
 549         close(sys->fd);
 550         return VLC_EGENERIC;
 551     }
 552     sys->old_info = sys->var_info;
 553
 554     /* Get some info on the framebuffer itself */
 555     if (force_resolution) {
 556         sys->var_info.xres = sys->var_info.xres_virtual = sys->width;
 557         sys->var_info.yres = sys->var_info.yres_virtual = sys->height;
 558     }
 559
 560     /* Set some attributes */
 561     sys->var_info.activate = sys->is_tty ? FB_ACTIVATE_NXTOPEN :
 562                                            FB_ACTIVATE_NOW;
 563     sys->var_info.xoffset  =  0;
 564     sys->var_info.yoffset  =  0;
 565
 566     if (ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->var_info)) {
 567         msg_Err(vd, "cannot set fb info (%m)");
 568         close(sys->fd);
 569         return VLC_EGENERIC;
 570     }
 571
 572     struct fb_fix_screeninfo fix_info;
 573     /* Get some information again, in the definitive configuration */
 574     if (ioctl(sys->fd, FBIOGET_FSCREENINFO, &fix_info) ||
 575         ioctl(sys->fd, FBIOGET_VSCREENINFO, &sys->var_info)) {
 576         msg_Err(vd, "cannot get additional fb info (%m)");
 577
 578         /* Restore fb config */
 579         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 580
 581         close(sys->fd);
 582         return VLC_EGENERIC;
 583     }
 584
 585     /* If the fb has limitations on mode change,
 586      * then keep the resolution of the fb */
 587     if ((sys->height != sys->var_info.yres) ||
 588         (sys->width != sys->var_info.xres)) {
 589         msg_Warn(vd,
 590                  "using framebuffer native resolution instead of requested (%ix%i)",
 591                  sys->width, sys->height);
 592     }
 593     sys->height = sys->var_info.yres;
 594     sys->width  = sys->var_info.xres_virtual ? sys->var_info.xres_virtual :
 595                                                sys->var_info.xres;
 596     sys->line_length = fix_info.line_length;
 597
 598     /* FIXME: if the image is full-size, it gets cropped on the left
 599      * because of the xres / xres_virtual slight difference */
 600     msg_Dbg(vd, "%ix%i (virtual %ix%i) (request %ix%i)",
 601             sys->var_info.xres, sys->var_info.yres,
 602             sys->var_info.xres_virtual,
 603             sys->var_info.yres_virtual,
 604             sys->width, sys->height);
 605
 606     sys->palette = NULL;
 607     sys->has_pan = (fix_info.ypanstep || fix_info.ywrapstep);
 608
 609     switch (sys->var_info.bits_per_pixel) {
 610     case 8:
 611         sys->palette = malloc(8 * 256 * sizeof(uint16_t));
 612         if (!sys->palette) {
 613             /* Restore fb config */
 614             ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 615
 616             close(sys->fd);
 617             return VLC_ENOMEM;
 618         }
 619         sys->fb_cmap.start = 0;
 620         sys->fb_cmap.len = 256;
 621         sys->fb_cmap.red = sys->palette;
 622         sys->fb_cmap.green = sys->palette + 256 * sizeof(uint16_t);
 623         sys->fb_cmap.blue = sys->palette + 2 * 256 * sizeof(uint16_t);
 624         sys->fb_cmap.transp = sys->palette + 3 * 256 * sizeof(uint16_t);
 625
 626         /* Save the colormap */
 627         ioctl(sys->fd, FBIOGETCMAP, &sys->fb_cmap);
 628
 629         sys->bytes_per_pixel = 1;
 630         break;
 631
 632     case 15:
 633     case 16:
 634         sys->bytes_per_pixel = 2;
 635         break;
 636
 637     case 24:
 638         sys->bytes_per_pixel = 3;
 639         break;
 640
 641     case 32:
 642         sys->bytes_per_pixel = 4;
 643         break;
 644
 645     default:
 646         msg_Err(vd, "screen depth %d is not supported",
 647                 sys->var_info.bits_per_pixel);
 648
 649         /* Restore fb config */
 650         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 651
 652         close(sys->fd);
 653         return VLC_EGENERIC;
 654     }
 655
 656     sys->video_size = sys->line_length * sys->var_info.yres_virtual;
 657
 658     /* Map a framebuffer at the beginning */
 659     sys->video_ptr = mmap(NULL, sys->video_size,
 660                           PROT_READ | PROT_WRITE, MAP_SHARED, sys->fd, 0);
 661
 662     if (sys->video_ptr == MAP_FAILED) {
 663         msg_Err(vd, "cannot map video memory (%m)");
 664
 665         if (sys->var_info.bits_per_pixel == 8) {
 666             free(sys->palette);
 667             sys->palette = NULL;
 668         }
 669
 670         /* Restore fb config */
 671         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 672
 673         close(sys->fd);
 674         return VLC_EGENERIC;
 675     }
 676
 677     ClearScreen(sys);
 678
 679     msg_Dbg(vd,
 680             "framebuffer type=%d, visual=%d, ypanstep=%d, ywrap=%d, accel=%d",
 681             fix_info.type, fix_info.visual,
 682             fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel);
 683     return VLC_SUCCESS;
 684 }
 685
 686 /*****************************************************************************
 687  * CloseDisplay: terminate FB video thread output method
 688  *****************************************************************************/
 689 static void CloseDisplay(vout_display_t *vd)
 690 {
 691     vout_display_sys_t *sys = vd->sys;
 692
 693     if (sys->video_ptr != MAP_FAILED) {
 694         ClearScreen(sys);
 695         munmap(sys->video_ptr, sys->video_size);
 696     }
 697
 698     if (sys->fd >= 0) {
 699         /* Restore palette */
 700         if (sys->var_info.bits_per_pixel == 8) {
 701             ioctl(sys->fd, FBIOPUTCMAP, &sys->fb_cmap);
 702             free(sys->palette);
 703             sys->palette = NULL;
 704         }
 705
 706         /* Restore fb config */
 707         ioctl(sys->fd, FBIOPUT_VSCREENINFO, &sys->old_info);
 708
 709         /* Close fb */
 710         close(sys->fd);
 711     }
 712 }
 713
 714 #if 0
 715 /*****************************************************************************
 716  * SwitchDisplay: VT change signal handler
 717  *****************************************************************************
 718  * This function activates or deactivates the output of the thread. It is
 719  * called by the VT driver, on terminal change.
 720  *****************************************************************************/
 721 static void SwitchDisplay(int i_signal)
 722 {
 723     vout_display_t *vd;
 724
 725     vlc_mutex_lock(&p_vout_bank->lock);
 726
 727     /* XXX: only test the first video output */
 728     if (p_vout_bank->i_count)
 729     {
 730         vd = p_vout_bank->pp_vout[0];
 731
 732         switch (i_signal)
 733         {
 734         case SIGUSR1:                                /* vt has been released */
 735             vd->b_active = 0;
 736             ioctl(sys->tty, VT_RELDISP, 1);
 737             break;
 738         case SIGUSR2:                                /* vt has been acquired */
 739             vd->b_active = 1;
 740             ioctl(sys->tty, VT_RELDISP, VT_ACTIVATE);
 741             /* handle blanking */
 742             vlc_mutex_lock(&vd->change_lock);
 743             vd->i_changes |= VOUT_SIZE_CHANGE;
 744             vlc_mutex_unlock(&vd->change_lock);
 745             break;
 746         }
 747     }
 748
 749     vlc_mutex_unlock(&p_vout_bank->lock);
 750 }
 751 #endif
 752
 753 /*****************************************************************************
 754  * TextMode and GfxMode : switch tty to text/graphic mode
 755  *****************************************************************************
 756  * These functions toggle the tty mode.
 757  *****************************************************************************/
 758 static void TextMode(int tty)
 759 {
 760     /* return to text mode */
 761     if (-1 == ioctl(tty, KDSETMODE, KD_TEXT)) {
 762         /*msg_Err(vd, "failed ioctl KDSETMODE KD_TEXT");*/
 763     }
 764 }
 765
 766 static void GfxMode(int tty)
 767 {
 768     /* switch to graphic mode */
 769     if (-1 == ioctl(tty, KDSETMODE, KD_GRAPHICS)) {
 770         /*msg_Err(vd, "failed ioctl KDSETMODE KD_GRAPHICS");*/
 771     }
 772 }