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
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <errno.h>                                                 /* ENOMEM */
  34 #include <signal.h>                                      /* SIGUSR1, SIGUSR2 */
  35 #include <fcntl.h>                                                 /* open() */
  36 #include <unistd.h>                                               /* close() */
  37
  38 #include <termios.h>                                       /* struct termios */
  39 #include <sys/ioctl.h>
  40 #include <sys/mman.h>                                              /* mmap() */
  41
  42 #include <linux/fb.h>
  43 #include <linux/vt.h>                                                /* VT_* */
  44 #include <linux/kd.h>                                                 /* KD* */
  45
  46 #include <vlc_common.h>
  47 #include <vlc_plugin.h>
  48 #include <vlc_vout.h>
  49 #include <vlc_interface.h>
  50
  51 /*****************************************************************************
  52  * Local prototypes
  53  *****************************************************************************/
  54 static int  Create    ( vlc_object_t * );
  55 static void Destroy   ( vlc_object_t * );
  56
  57 static int  Init      ( vout_thread_t * );
  58 static void End       ( vout_thread_t * );
  59 static int  Manage    ( vout_thread_t * );
  60 static void Display   ( vout_thread_t *, picture_t * );
  61 static int  Control   ( vout_thread_t *, int, va_list );
  62
  63 static int  NewPicture     ( vout_thread_t *, picture_t * );
  64 static void FreePicture    ( vout_thread_t *, picture_t * );
  65
  66 static int  OpenDisplay    ( vout_thread_t * );
  67 static void CloseDisplay   ( vout_thread_t * );
  68 static void SwitchDisplay  ( int i_signal );
  69 static void TextMode       ( int i_tty );
  70 static void GfxMode        ( int i_tty );
  71
  72 #define MAX_DIRECTBUFFERS 1
  73
  74 /*****************************************************************************
  75  * Module descriptor
  76  *****************************************************************************/
  77 #define FB_DEV_VAR "fbdev"
  78
  79 #define DEVICE_TEXT N_("Framebuffer device")
  80 #define DEVICE_LONGTEXT N_( \
  81     "Framebuffer device to use for rendering (usually /dev/fb0).")
  82
  83 #define TTY_TEXT N_("Run fb on current tty.")
  84 #define TTY_LONGTEXT N_( \
  85     "Run framebuffer on current TTY device (default enabled). " \
  86     "(disable tty handling with caution)" )
  87
  88 #define CHROMA_TEXT N_("Chroma used.")
  89 #define CHROMA_LONGTEXT N_( \
  90     "Force use of a specific chroma for output. Default is I420." )
  91
  92 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  93 #define ASPECT_RATIO_LONGTEXT N_( \
  94     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  95
  96 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  97 #define FB_MODE_LONGTEXT N_( \
  98     "Select the resolution for the framebuffer. Currently it supports " \
  99     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
 100
 101 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration.")
 102 #define HW_ACCEL_LONGTEXT N_( \
 103     "If your framebuffer supports hardware acceleration or does double buffering " \
 104     "in hardware then you must disable this option. It then does double buffering " \
 105     "in software." )
 106
 107 vlc_module_begin ()
 108     set_shortname( "Framebuffer" )
 109     set_category( CAT_VIDEO )
 110     set_subcategory( SUBCAT_VIDEO_VOUT )
 111     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
 112               false )
 113     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, true )
 114     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 115                 true )
 116     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
 117                 ASPECT_RATIO_LONGTEXT, true )
 118     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
 119                  true )
 120     add_bool( "fb-hw-accel", true, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
 121               true )
 122     set_description( N_("GNU/Linux framebuffer video output") )
 123     set_capability( "video output", 30 )
 124     set_callbacks( Create, Destroy )
 125 vlc_module_end ()
 126
 127 /*****************************************************************************
 128  * vout_sys_t: video output framebuffer method descriptor
 129  *****************************************************************************
 130  * This structure is part of the video output thread descriptor.
 131  * It describes the FB specific properties of an output thread.
 132  *****************************************************************************/
 133 struct vout_sys_t
 134 {
 135     /* System information */
 136     int                 i_tty;                          /* tty device handle */
 137     bool                b_tty;
 138     struct termios      old_termios;
 139
 140     /* Original configuration information */
 141     struct sigaction            sig_usr1;           /* USR1 previous handler */
 142     struct sigaction            sig_usr2;           /* USR2 previous handler */
 143     struct vt_mode              vt_mode;                 /* previous VT mode */
 144
 145     /* Framebuffer information */
 146     int                         i_fd;                       /* device handle */
 147     struct fb_var_screeninfo    old_info;       /* original mode information */
 148     struct fb_var_screeninfo    var_info;        /* current mode information */
 149     bool                        b_pan;     /* does device supports panning ? */
 150     struct fb_cmap              fb_cmap;                /* original colormap */
 151     uint16_t                    *p_palette;              /* original palette */
 152     bool                        b_hw_accel;          /* has hardware support */
 153
 154     /* Video information */
 155     uint32_t i_width;
 156     uint32_t i_height;
 157     int      i_aspect;
 158     int      i_bytes_per_pixel;
 159     bool     b_auto;       /* Automatically adjust video size to fb size */
 160     vlc_fourcc_t i_chroma;
 161
 162     /* Video memory */
 163     uint8_t    *p_video;                                      /* base adress */
 164     size_t      i_page_size;                                    /* page size */
 165 };
 166
 167 struct picture_sys_t
 168 {
 169     uint8_t *    p_data;                                      /* base adress */
 170 };
 171
 172 /*****************************************************************************
 173  * Create: allocates FB video thread output method
 174  *****************************************************************************
 175  * This function allocates and initializes a FB vout method.
 176  *****************************************************************************/
 177 static int Create( vlc_object_t *p_this )
 178 {
 179     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 180     vout_sys_t    *p_sys;
 181     char          *psz_chroma;
 182     char          *psz_aspect;
 183     int           i_mode;
 184     struct sigaction    sig_tty;                 /* sigaction for tty change */
 185     struct vt_mode      vt_mode;                          /* vt current mode */
 186     struct termios      new_termios;
 187
 188     /* Allocate instance and initialize some members */
 189     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 190     if( p_vout->p_sys == NULL )
 191         return VLC_ENOMEM;
 192     memset( p_sys, 0, sizeof(vout_sys_t) );
 193
 194     p_vout->pf_init = Init;
 195     p_vout->pf_end = End;
 196     p_vout->pf_manage = Manage;
 197     p_vout->pf_render = NULL;
 198     p_vout->pf_display = Display;
 199     p_vout->pf_control = Control;
 200
 201     /* Does the framebuffer uses hw acceleration? */
 202     p_sys->b_hw_accel = var_CreateGetBool( p_vout, "fb-hw-accel" );
 203
 204     /* Set tty and fb devices */
 205     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 206     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 207 #ifndef WIN32
 208 #if defined(HAVE_ISATTY)
 209     /* Check that stdin is a TTY */
 210     if( p_sys->b_tty && !isatty( 0 ) )
 211     {
 212         msg_Warn( p_vout, "fd 0 is not a TTY" );
 213         return VLC_EGENERIC;
 214     }
 215     else
 216     {
 217         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 218                           "there is no way to return to the tty." );
 219     }
 220 #endif
 221 #endif
 222
 223     psz_chroma = var_CreateGetNonEmptyString( p_vout, "fb-chroma" );
 224     if( psz_chroma )
 225     {
 226         if( strlen( psz_chroma ) == 4 )
 227         {
 228             p_sys->i_chroma = VLC_FOURCC( psz_chroma[0],
 229                                    psz_chroma[1],
 230                                    psz_chroma[2],
 231                                    psz_chroma[3] );
 232             msg_Dbg( p_vout, "forcing chroma '%s'", psz_chroma );
 233         }
 234         else
 235         {
 236             msg_Warn( p_vout, "invalid chroma (%s), using defaults.",
 237                       psz_chroma );
 238         }
 239         free( psz_chroma );
 240         psz_chroma = NULL;
 241     }
 242
 243     p_sys->i_aspect = -1;
 244     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 245     if( psz_aspect )
 246     {
 247         char *psz_parser = strchr( psz_aspect, ':' );
 248
 249         if( psz_parser )
 250         {
 251             *psz_parser++ = '\0';
 252             p_sys->i_aspect = ( atoi( psz_aspect )
 253                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 254         }
 255         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 256                   atoi( psz_aspect ), atoi( psz_parser ) );
 257
 258         free( psz_aspect );
 259         psz_aspect = NULL;
 260     }
 261
 262     p_sys->b_auto = false;
 263     i_mode = var_CreateGetInteger( p_vout, "fb-mode" );
 264     switch( i_mode )
 265     {
 266         case 0: /* QCIF */
 267             p_sys->i_width  = 176;
 268             p_sys->i_height = 144;
 269             break;
 270         case 1: /* CIF */
 271             p_sys->i_width  = 352;
 272             p_sys->i_height = 288;
 273             break;
 274         case 2: /* NTSC */
 275             p_sys->i_width  = 640;
 276             p_sys->i_height = 480;
 277             break;
 278         case 3: /* PAL */
 279             p_sys->i_width  = 704;
 280             p_sys->i_height = 576;
 281             break;
 282         case 4:
 283         default:
 284             p_sys->b_auto = true;
 285             break;
 286      }
 287
 288     /* tty handling */
 289     if( p_sys->b_tty )
 290     {
 291         GfxMode( p_sys->i_tty );
 292
 293         /* Set keyboard settings */
 294         if( tcgetattr(0, &p_vout->p_sys->old_termios) == -1 )
 295         {
 296             msg_Err( p_vout, "tcgetattr failed" );
 297         }
 298
 299         if( tcgetattr(0, &new_termios) == -1 )
 300         {
 301             msg_Err( p_vout, "tcgetattr failed" );
 302         }
 303
 304         /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 305         new_termios.c_lflag |= (ECHO | ECHOCTL); */
 306         new_termios.c_lflag &= ~ (ICANON);
 307         new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 308         new_termios.c_iflag = 0;
 309         new_termios.c_cc[VMIN] = 1;
 310         new_termios.c_cc[VTIME] = 0;
 311
 312         if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 313         {
 314             msg_Err( p_vout, "tcsetattr failed" );
 315         }
 316
 317         ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 318
 319         /* Set-up tty signal handler to be aware of tty changes */
 320         memset( &sig_tty, 0, sizeof( sig_tty ) );
 321         sig_tty.sa_handler = SwitchDisplay;
 322         sigemptyset( &sig_tty.sa_mask );
 323         if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 324             sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 325         {
 326             msg_Err( p_vout, "cannot set signal handler (%m)" );
 327             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 328             TextMode( p_sys->i_tty );
 329             free( p_vout->p_sys );
 330             return VLC_EGENERIC;
 331         }
 332
 333         /* Set-up tty according to new signal handler */
 334         if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 335         {
 336             msg_Err( p_vout, "cannot get terminal mode (%m)" );
 337             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 338             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 339             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 340             TextMode( p_sys->i_tty );
 341             free( p_vout->p_sys );
 342             return VLC_EGENERIC;
 343         }
 344         memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 345         vt_mode.mode   = VT_PROCESS;
 346         vt_mode.waitv  = 0;
 347         vt_mode.relsig = SIGUSR1;
 348         vt_mode.acqsig = SIGUSR2;
 349
 350         if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 351         {
 352             msg_Err( p_vout, "cannot set terminal mode (%m)" );
 353             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 354             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 355             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 356             TextMode( p_sys->i_tty );
 357             free( p_vout->p_sys );
 358             return VLC_EGENERIC;
 359         }
 360     }
 361
 362     if( OpenDisplay( p_vout ) )
 363     {
 364         Destroy( VLC_OBJECT(p_vout) );
 365         return VLC_EGENERIC;
 366     }
 367
 368     return VLC_SUCCESS;
 369 }
 370
 371
 372 /*****************************************************************************
 373  * Destroy: destroy FB video thread output method
 374  *****************************************************************************
 375  * Terminate an output method created by Create
 376  *****************************************************************************/
 377 static void Destroy( vlc_object_t *p_this )
 378 {
 379     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 380
 381     CloseDisplay( p_vout );
 382
 383     if( p_vout->p_sys->b_tty )
 384     {
 385         /* Reset the terminal */
 386         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 387
 388         /* Remove signal handlers */
 389         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 390         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 391
 392         /* Reset the keyboard state */
 393         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 394
 395         /* Return to text mode */
 396         TextMode( p_vout->p_sys->i_tty );
 397     }
 398
 399     /* Destroy structure */
 400     free( p_vout->p_sys );
 401 }
 402
 403 /*****************************************************************************
 404  * NewPicture: allocate a picture
 405  *****************************************************************************
 406  * Returns 0 on success, -1 otherwise
 407  *****************************************************************************/
 408 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 409 {
 410     /* We know the chroma, allocate a buffer which will be used
 411      * directly by the decoder */
 412     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 413     if( p_pic->p_sys == NULL )
 414     {
 415         return VLC_ENOMEM;
 416     }
 417
 418     /* Fill in picture_t fields */
 419     vout_InitPicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma,
 420                       p_vout->output.i_width, p_vout->output.i_height,
 421                       p_vout->output.i_aspect );
 422
 423     p_pic->p_sys->p_data = malloc( p_vout->p_sys->i_page_size );
 424     if( !p_pic->p_sys->p_data )
 425     {
 426         free( p_pic->p_sys );
 427         p_pic->p_sys = NULL;
 428         return VLC_ENOMEM;
 429     }
 430
 431     p_pic->p->p_pixels = (uint8_t*) p_pic->p_sys->p_data;
 432
 433     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 434     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 435     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 436
 437     if( p_vout->p_sys->var_info.xres_virtual )
 438     {
 439         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 440                              * p_vout->p_sys->i_bytes_per_pixel;
 441     }
 442     else
 443     {
 444         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 445                              * p_vout->p_sys->i_bytes_per_pixel;
 446     }
 447
 448     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 449                                  * p_vout->p_sys->i_bytes_per_pixel;
 450     p_pic->i_planes = 1;
 451
 452     return VLC_SUCCESS;
 453 }
 454
 455 /*****************************************************************************
 456  * FreePicture: destroy a picture allocated with NewPicture
 457  *****************************************************************************
 458  * Destroy Image AND associated data.
 459  *****************************************************************************/
 460 static void FreePicture( vout_thread_t *p_vout, picture_t *p_pic )
 461 {
 462     VLC_UNUSED(p_vout);
 463     free( p_pic->p_sys->p_data );
 464     free( p_pic->p_sys );
 465     p_pic->p_sys = NULL;
 466 }
 467
 468 /*****************************************************************************
 469  * Init: initialize framebuffer video thread output method
 470  *****************************************************************************/
 471 static int Init( vout_thread_t *p_vout )
 472 {
 473     vout_sys_t *p_sys = p_vout->p_sys;
 474     int i_index;
 475     picture_t *p_pic = NULL;
 476
 477     I_OUTPUTPICTURES = 0;
 478
 479     p_vout->output.i_width  = p_vout->render.i_width;
 480     p_vout->output.i_height = p_vout->render.i_height;
 481     p_vout->output.i_aspect = p_vout->render.i_aspect;
 482
 483     p_vout->fmt_out = p_vout->fmt_in;
 484     if( p_sys->i_chroma == 0 )
 485     {
 486         /* Initialize the output structure: RGB with square pixels, whatever
 487          * the input format is, since it's the only format we know */
 488         switch( p_sys->var_info.bits_per_pixel )
 489         {
 490         case 8: /* FIXME: set the palette */
 491             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 492         case 15:
 493             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 494         case 16:
 495             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 496         case 24:
 497             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 498         case 32:
 499             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 500         default:
 501             msg_Err( p_vout, "unknown screen depth %i",
 502                      p_vout->p_sys->var_info.bits_per_pixel );
 503             return VLC_EGENERIC;
 504         }
 505
 506         if( p_sys->var_info.bits_per_pixel != 8 )
 507         {
 508             p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 509                                  << p_sys->var_info.red.offset;
 510             p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 511                                  << p_sys->var_info.green.offset;
 512             p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 513                                  << p_sys->var_info.blue.offset;
 514         }
 515     }
 516     else
 517     {
 518         p_vout->output.i_chroma = p_sys->i_chroma;
 519     }
 520     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 521
 522     p_vout->output.i_width =
 523     p_vout->fmt_out.i_width =
 524     p_vout->fmt_out.i_visible_width = p_sys->i_width;
 525     p_vout->output.i_height =
 526     p_vout->fmt_out.i_height =
 527     p_vout->fmt_out.i_visible_height = p_sys->i_height;
 528
 529     /* Assume we have square pixels */
 530     if( p_sys->i_aspect < 0 )
 531     {
 532         p_vout->output.i_aspect = ( p_sys->i_width
 533                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 534     }
 535     else p_vout->output.i_aspect = p_sys->i_aspect;
 536
 537     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 538     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 539     p_vout->fmt_out.i_x_offset= p_vout->fmt_out.i_y_offset = 0;
 540
 541     /* Clear the screen */
 542     memset( p_sys->p_video, 0, p_sys->i_page_size );
 543
 544     if( !p_sys->b_hw_accel )
 545     {
 546         /* Try to initialize up to MAX_DIRECTBUFFERS direct buffers */
 547         while( I_OUTPUTPICTURES < MAX_DIRECTBUFFERS )
 548         {
 549             p_pic = NULL;
 550
 551             /* Find an empty picture slot */
 552             for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 553             {
 554                 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 555                 {
 556                     p_pic = p_vout->p_picture + i_index;
 557                     break;
 558                 }
 559             }
 560
 561             /* Allocate the picture */
 562             if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 563             {
 564                 break;
 565             }
 566
 567             p_pic->i_status = DESTROYED_PICTURE;
 568             p_pic->i_type   = DIRECT_PICTURE;
 569
 570             PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 571
 572             I_OUTPUTPICTURES++;
 573         }
 574     }
 575     else
 576     {
 577         /* Try to initialize 1 direct buffer */
 578         p_pic = NULL;
 579
 580         /* Find an empty picture slot */
 581         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 582         {
 583             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 584             {
 585                 p_pic = p_vout->p_picture + i_index;
 586                 break;
 587             }
 588         }
 589
 590         /* Allocate the picture */
 591         if( p_pic == NULL )
 592         {
 593             return VLC_EGENERIC;
 594         }
 595
 596         /* We know the chroma, allocate a buffer which will be used
 597         * directly by the decoder */
 598         p_pic->p->p_pixels = p_vout->p_sys->p_video;
 599         p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 600         p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 601         p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 602
 603         if( p_vout->p_sys->var_info.xres_virtual )
 604         {
 605             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 606                                 * p_vout->p_sys->i_bytes_per_pixel;
 607         }
 608         else
 609         {
 610             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 611                                 * p_vout->p_sys->i_bytes_per_pixel;
 612         }
 613
 614         p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 615                                     * p_vout->p_sys->i_bytes_per_pixel;
 616         p_pic->i_planes = 1;
 617         p_pic->i_status = DESTROYED_PICTURE;
 618         p_pic->i_type   = DIRECT_PICTURE;
 619
 620         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 621
 622         I_OUTPUTPICTURES++;
 623     }
 624
 625     return VLC_SUCCESS;
 626 }
 627
 628 /*****************************************************************************
 629  * End: terminate framebuffer video thread output method
 630  *****************************************************************************/
 631 static void End( vout_thread_t *p_vout )
 632 {
 633     if( !p_vout->p_sys->b_hw_accel )
 634     {
 635         int i_index;
 636
 637         /* Free the direct buffers we allocated */
 638         for( i_index = I_OUTPUTPICTURES ; i_index ; )
 639         {
 640             i_index--;
 641             FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
 642         }
 643
 644     }
 645     /* Clear the screen */
 646     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 647 }
 648
 649 /*****************************************************************************
 650  * Control: control facility for the vout
 651  *****************************************************************************/
 652 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 653 {
 654     switch( i_query )
 655     {
 656        default:
 657             return vout_vaControlDefault( p_vout, i_query, args );
 658     }
 659 }
 660
 661 /*****************************************************************************
 662  * Manage: handle FB events
 663  *****************************************************************************
 664  * This function should be called regularly by video output thread. It manages
 665  * console events. It returns a non null value on error.
 666  *****************************************************************************/
 667 static int Manage( vout_thread_t *p_vout )
 668 {
 669 #if 0
 670     uint8_t buf;
 671
 672     if ( read(0, &buf, 1) == 1)
 673     {
 674         switch( buf )
 675         {
 676         case 'q':
 677             libvlc_Quit( p_vout->p_libvlc );
 678             break;
 679
 680         default:
 681             break;
 682         }
 683     }
 684 #endif
 685
 686     /*
 687      * Size change
 688      */
 689     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 690     {
 691         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 692         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 693
 694         /* Destroy XImages to change their size */
 695         End( p_vout );
 696
 697         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 698         if( Init( p_vout ) )
 699         {
 700             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 701             return VLC_EGENERIC;
 702         }
 703
 704         /* Clear screen */
 705         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 706
 707 #if 0
 708         /* Tell the video output thread that it will need to rebuild YUV
 709          * tables. This is needed since conversion buffer size may have changed */
 710         p_vout->i_changes |= VOUT_YUV_CHANGE;
 711 #endif
 712     }
 713
 714     return VLC_SUCCESS;
 715 }
 716
 717 /*****************************************************************************
 718  * Display: displays previously rendered output
 719  *****************************************************************************
 720  * This function send the currently rendered image to FB image, waits until
 721  * it is displayed and switch the two rendering buffers, preparing next frame.
 722  *****************************************************************************/
 723 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 724 {
 725 static int panned=0;
 726     /* swap the two Y offsets if the drivers supports panning */
 727     if( p_vout->p_sys->b_pan )
 728     {
 729         p_vout->p_sys->var_info.yoffset = 0;
 730         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 731
 732         /* the X offset should be 0, but who knows ...
 733          * some other app might have played with the framebuffer */
 734         p_vout->p_sys->var_info.xoffset = 0;
 735
 736         if( panned < 0 )
 737         {
 738             ioctl( p_vout->p_sys->i_fd,
 739                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 740             panned++;
 741         }
 742     }
 743
 744     if( !p_vout->p_sys->b_hw_accel )
 745     {
 746         vlc_memcpy( p_vout->p_sys->p_video, p_pic->p->p_pixels,
 747                     p_vout->p_sys->i_page_size );
 748     }
 749 }
 750
 751 #if 0
 752 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 753                                                uint16_t *blue, uint16_t *transp )
 754 {
 755     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 756
 757     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 758 }
 759 #endif
 760
 761 /* following functions are local */
 762
 763 /*****************************************************************************
 764  * OpenDisplay: initialize framebuffer
 765  *****************************************************************************/
 766 static int OpenDisplay( vout_thread_t *p_vout )
 767 {
 768     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 769     char *psz_device;                             /* framebuffer device path */
 770     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 771
 772     /* Open framebuffer device */
 773     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 774     {
 775         msg_Err( p_vout, "don't know which fb device to open" );
 776         return VLC_EGENERIC;
 777     }
 778
 779     p_sys->i_fd = open( psz_device, O_RDWR);
 780     if( p_sys->i_fd == -1 )
 781     {
 782         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 783         free( psz_device );
 784         return VLC_EGENERIC;
 785     }
 786     free( psz_device );
 787     psz_device = NULL;
 788
 789     /* Get framebuffer device information */
 790     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 791     {
 792         msg_Err( p_vout, "cannot get fb info (%m)" );
 793         close( p_sys->i_fd );
 794         return VLC_EGENERIC;
 795     }
 796
 797     memcpy( &p_sys->old_info, &p_sys->var_info,
 798             sizeof( struct fb_var_screeninfo ) );
 799
 800     /* Get some info on the framebuffer itself */
 801     if( !p_sys->b_auto )
 802     {
 803         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 804         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 805         p_vout->fmt_out.i_width = p_sys->i_width;
 806         p_vout->fmt_out.i_height = p_sys->i_height;
 807     }
 808
 809     /* Set some attributes */
 810     p_sys->var_info.activate = p_sys->b_tty
 811                                ? FB_ACTIVATE_NXTOPEN
 812                                : FB_ACTIVATE_NOW;
 813     p_sys->var_info.xoffset =  0;
 814     p_sys->var_info.yoffset =  0;
 815
 816     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 817     {
 818         msg_Err( p_vout, "cannot set fb info (%m)" );
 819         close( p_sys->i_fd );
 820         return VLC_EGENERIC;
 821     }
 822
 823     /* Get some information again, in the definitive configuration */
 824     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 825          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 826     {
 827         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 828
 829         /* Restore fb config */
 830         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 831
 832         close( p_sys->i_fd );
 833         return VLC_EGENERIC;
 834     }
 835
 836     /* If the fb has limitations on mode change,
 837      * then keep the resolution of the fb */
 838     if( (p_sys->i_height != p_sys->var_info.yres) ||
 839         (p_sys->i_width != p_sys->var_info.xres) )
 840     {
 841         p_sys->b_auto = true;
 842         msg_Warn( p_vout,
 843                   "using framebuffer native resolution instead of requested (%ix%i)",
 844                   p_sys->i_width, p_sys->i_height );
 845     }
 846     p_sys->i_height = p_sys->var_info.yres;
 847     p_sys->i_width  = p_sys->var_info.xres_virtual
 848                                ? p_sys->var_info.xres_virtual
 849                                : p_sys->var_info.xres;
 850
 851     /* FIXME: if the image is full-size, it gets cropped on the left
 852      * because of the xres / xres_virtual slight difference */
 853     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 854              p_sys->var_info.xres, p_sys->var_info.yres,
 855              p_sys->var_info.xres_virtual,
 856              p_sys->var_info.yres_virtual,
 857              p_sys->i_width, p_sys->i_height );
 858
 859     p_sys->p_palette = NULL;
 860     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 861
 862     switch( p_sys->var_info.bits_per_pixel )
 863     {
 864     case 8:
 865         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 866         if( !p_sys->p_palette )
 867         {
 868             /* Restore fb config */
 869             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 870
 871             close( p_sys->i_fd );
 872             return VLC_ENOMEM;
 873         }
 874         p_sys->fb_cmap.start = 0;
 875         p_sys->fb_cmap.len = 256;
 876         p_sys->fb_cmap.red = p_sys->p_palette;
 877         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 878         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 879         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 880
 881         /* Save the colormap */
 882         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 883
 884         p_sys->i_bytes_per_pixel = 1;
 885         break;
 886
 887     case 15:
 888     case 16:
 889         p_sys->i_bytes_per_pixel = 2;
 890         break;
 891
 892     case 24:
 893         p_sys->i_bytes_per_pixel = 3;
 894         break;
 895
 896     case 32:
 897         p_sys->i_bytes_per_pixel = 4;
 898         break;
 899
 900     default:
 901         msg_Err( p_vout, "screen depth %d is not supported",
 902                          p_sys->var_info.bits_per_pixel );
 903
 904         /* Restore fb config */
 905         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 906
 907         close( p_sys->i_fd );
 908         return VLC_EGENERIC;
 909     }
 910
 911     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 912                          p_sys->i_bytes_per_pixel;
 913
 914     /* Map a framebuffer at the beginning */
 915     p_sys->p_video = mmap( NULL, p_sys->i_page_size,
 916                               PROT_READ | PROT_WRITE, MAP_SHARED,
 917                               p_sys->i_fd, 0 );
 918
 919     if( p_sys->p_video == MAP_FAILED )
 920     {
 921         msg_Err( p_vout, "cannot map video memory (%m)" );
 922
 923         if( p_sys->var_info.bits_per_pixel == 8 )
 924         {
 925             free( p_sys->p_palette );
 926             p_sys->p_palette = NULL;
 927         }
 928
 929         /* Restore fb config */
 930         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 931
 932         close( p_sys->i_fd );
 933         return VLC_EGENERIC;
 934     }
 935
 936     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 937              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 938              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 939     return VLC_SUCCESS;
 940 }
 941
 942 /*****************************************************************************
 943  * CloseDisplay: terminate FB video thread output method
 944  *****************************************************************************/
 945 static void CloseDisplay( vout_thread_t *p_vout )
 946 {
 947     /* Clear display */
 948     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 949     munmap( p_vout->p_sys->p_video, p_vout->p_sys->i_page_size );
 950
 951     if( p_vout->p_sys->i_fd >= 0 )
 952     {
 953         /* Restore palette */
 954         if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 955         {
 956             ioctl( p_vout->p_sys->i_fd,
 957                    FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 958             free( p_vout->p_sys->p_palette );
 959             p_vout->p_sys->p_palette = NULL;
 960         }
 961
 962         /* Restore fb config */
 963         ioctl( p_vout->p_sys->i_fd,
 964                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 965
 966         /* Close fb */
 967         close( p_vout->p_sys->i_fd );
 968     }
 969 }
 970
 971 /*****************************************************************************
 972  * SwitchDisplay: VT change signal handler
 973  *****************************************************************************
 974  * This function activates or deactivates the output of the thread. It is
 975  * called by the VT driver, on terminal change.
 976  *****************************************************************************/
 977 static void SwitchDisplay( int i_signal )
 978 {
 979     VLC_UNUSED( i_signal );
 980 #if 0
 981     vout_thread_t *p_vout;
 982
 983     vlc_mutex_lock( &p_vout_bank->lock );
 984
 985     /* XXX: only test the first video output */
 986     if( p_vout_bank->i_count )
 987     {
 988         p_vout = p_vout_bank->pp_vout[0];
 989
 990         switch( i_signal )
 991         {
 992         case SIGUSR1:                                /* vt has been released */
 993             p_vout->b_active = 0;
 994             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 995             break;
 996         case SIGUSR2:                                /* vt has been acquired */
 997             p_vout->b_active = 1;
 998             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 999             /* handle blanking */
1000             vlc_mutex_lock( &p_vout->change_lock );
1001             p_vout->i_changes |= VOUT_SIZE_CHANGE;
1002             vlc_mutex_unlock( &p_vout->change_lock );
1003             break;
1004         }
1005     }
1006
1007     vlc_mutex_unlock( &p_vout_bank->lock );
1008 #endif
1009 }
1010
1011 /*****************************************************************************
1012  * TextMode and GfxMode : switch tty to text/graphic mode
1013  *****************************************************************************
1014  * These functions toggle the tty mode.
1015  *****************************************************************************/
1016 static void TextMode( int i_tty )
1017 {
1018     /* return to text mode */
1019     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
1020     {
1021         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
1022     }
1023 }
1024
1025 static void GfxMode( int i_tty )
1026 {
1027     /* switch to graphic mode */
1028     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
1029     {
1030         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
1031     }
1032 }