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
  50 /*****************************************************************************
  51  * Local prototypes
  52  *****************************************************************************/
  53 static int  Create    ( vlc_object_t * );
  54 static void Destroy   ( vlc_object_t * );
  55
  56 static int  Init      ( vout_thread_t * );
  57 static void End       ( vout_thread_t * );
  58 static int  Manage    ( vout_thread_t * );
  59 static void Display   ( vout_thread_t *, picture_t * );
  60 static int  Control   ( vout_thread_t *, int, va_list );
  61
  62 static int  NewPicture     ( vout_thread_t *, picture_t * );
  63 static void FreePicture    ( vout_thread_t *, picture_t * );
  64
  65 static int  OpenDisplay    ( vout_thread_t * );
  66 static void CloseDisplay   ( vout_thread_t * );
  67 static void SwitchDisplay  ( int i_signal );
  68 static void TextMode       ( int i_tty );
  69 static void GfxMode        ( int i_tty );
  70
  71 #define MAX_DIRECTBUFFERS 1
  72
  73 /*****************************************************************************
  74  * Module descriptor
  75  *****************************************************************************/
  76 #define FB_DEV_VAR "fbdev"
  77
  78 #define DEVICE_TEXT N_("Framebuffer device")
  79 #define DEVICE_LONGTEXT N_( \
  80     "Framebuffer device to use for rendering (usually /dev/fb0).")
  81
  82 #define TTY_TEXT N_("Run fb on current tty.")
  83 #define TTY_LONGTEXT N_( \
  84     "Run framebuffer on current TTY device (default enabled). " \
  85     "(disable tty handling with caution)" )
  86
  87 #define CHROMA_TEXT N_("Chroma used.")
  88 #define CHROMA_LONGTEXT N_( \
  89     "Force use of a specific chroma for output. Default is I420." )
  90
  91 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  92 #define ASPECT_RATIO_LONGTEXT N_( \
  93     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  94
  95 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  96 #define FB_MODE_LONGTEXT N_( \
  97     "Select the resolution for the framebuffer. Currently it supports " \
  98     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
  99
 100 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration.")
 101 #define HW_ACCEL_LONGTEXT N_( \
 102     "If your framebuffer supports hardware acceleration or does double buffering " \
 103     "in hardware then you must disable this option. It then does double buffering " \
 104     "in software." )
 105
 106 vlc_module_begin ()
 107     set_shortname( "Framebuffer" )
 108     set_category( CAT_VIDEO )
 109     set_subcategory( SUBCAT_VIDEO_VOUT )
 110     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
 111               false );
 112     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, true )
 113     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 114                 true );
 115     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
 116                 ASPECT_RATIO_LONGTEXT, true );
 117     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
 118                  true );
 119     add_bool( "fb-hw-accel", true, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
 120               true );
 121     set_description( N_("GNU/Linux console framebuffer video output") )
 122     set_capability( "video output", 30 )
 123     set_callbacks( Create, Destroy )
 124 vlc_module_end ()
 125
 126 /*****************************************************************************
 127  * vout_sys_t: video output framebuffer method descriptor
 128  *****************************************************************************
 129  * This structure is part of the video output thread descriptor.
 130  * It describes the FB specific properties of an output thread.
 131  *****************************************************************************/
 132 struct vout_sys_t
 133 {
 134     /* System information */
 135     int                 i_tty;                          /* tty device handle */
 136     bool                b_tty;
 137     struct termios      old_termios;
 138
 139     /* Original configuration information */
 140     struct sigaction            sig_usr1;           /* USR1 previous handler */
 141     struct sigaction            sig_usr2;           /* USR2 previous handler */
 142     struct vt_mode              vt_mode;                 /* previous VT mode */
 143
 144     /* Framebuffer information */
 145     int                         i_fd;                       /* device handle */
 146     struct fb_var_screeninfo    old_info;       /* original mode information */
 147     struct fb_var_screeninfo    var_info;        /* current mode information */
 148     bool                        b_pan;     /* does device supports panning ? */
 149     struct fb_cmap              fb_cmap;                /* original colormap */
 150     uint16_t                    *p_palette;              /* original palette */
 151     bool                        b_hw_accel;          /* has hardware support */
 152
 153     /* Video information */
 154     uint32_t i_width;
 155     uint32_t i_height;
 156     int      i_aspect;
 157     int      i_bytes_per_pixel;
 158     bool     b_auto;       /* Automatically adjust video size to fb size */
 159     vlc_fourcc_t i_chroma;
 160
 161     /* Video memory */
 162     uint8_t    *p_video;                                      /* base adress */
 163     size_t      i_page_size;                                    /* page size */
 164 };
 165
 166 struct picture_sys_t
 167 {
 168     uint8_t *    p_data;                                      /* base adress */
 169 };
 170
 171 /*****************************************************************************
 172  * Create: allocates FB video thread output method
 173  *****************************************************************************
 174  * This function allocates and initializes a FB vout method.
 175  *****************************************************************************/
 176 static int Create( vlc_object_t *p_this )
 177 {
 178     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 179     vout_sys_t    *p_sys;
 180     char          *psz_chroma;
 181     char          *psz_aspect;
 182     int           i_mode;
 183     struct sigaction    sig_tty;                 /* sigaction for tty change */
 184     struct vt_mode      vt_mode;                          /* vt current mode */
 185     struct termios      new_termios;
 186
 187     /* Allocate instance and initialize some members */
 188     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 189     if( p_vout->p_sys == NULL )
 190         return VLC_ENOMEM;
 191     memset( p_sys, 0, sizeof(vout_sys_t) );
 192
 193     p_vout->pf_init = Init;
 194     p_vout->pf_end = End;
 195     p_vout->pf_manage = Manage;
 196     p_vout->pf_render = NULL;
 197     p_vout->pf_display = Display;
 198     p_vout->pf_control = Control;
 199
 200     /* Does the framebuffer uses hw acceleration? */
 201     p_sys->b_hw_accel = var_CreateGetBool( p_vout, "fb-hw-accel" );
 202
 203     /* Set tty and fb devices */
 204     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 205     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 206 #ifndef WIN32
 207 #if defined(HAVE_ISATTY)
 208     /* Check that stdin is a TTY */
 209     if( p_sys->b_tty && !isatty( 0 ) )
 210     {
 211         msg_Warn( p_vout, "fd 0 is not a TTY" );
 212         return VLC_EGENERIC;
 213     }
 214     else
 215     {
 216         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 217                           "there is no way to return to the tty." );
 218     }
 219 #endif
 220 #endif
 221
 222     psz_chroma = var_CreateGetNonEmptyString( p_vout, "fb-chroma" );
 223     if( psz_chroma )
 224     {
 225         if( strlen( psz_chroma ) == 4 )
 226         {
 227             p_sys->i_chroma = VLC_FOURCC( psz_chroma[0],
 228                                    psz_chroma[1],
 229                                    psz_chroma[2],
 230                                    psz_chroma[3] );
 231             msg_Dbg( p_vout, "forcing chroma '%s'", psz_chroma );
 232         }
 233         else
 234         {
 235             msg_Warn( p_vout, "invalid chroma (%s), using defaults.",
 236                       psz_chroma );
 237         }
 238         free( psz_chroma );
 239         psz_chroma = NULL;
 240     }
 241
 242     p_sys->i_aspect = -1;
 243     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 244     if( psz_aspect )
 245     {
 246         char *psz_parser = strchr( psz_aspect, ':' );
 247
 248         if( psz_parser )
 249         {
 250             *psz_parser++ = '\0';
 251             p_sys->i_aspect = ( atoi( psz_aspect )
 252                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 253         }
 254         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 255                   atoi( psz_aspect ), atoi( psz_parser ) );
 256
 257         free( psz_aspect );
 258         psz_aspect = NULL;
 259     }
 260
 261     p_sys->b_auto = false;
 262     i_mode = var_CreateGetInteger( p_vout, "fb-mode" );
 263     switch( i_mode )
 264     {
 265         case 0: /* QCIF */
 266             p_sys->i_width  = 176;
 267             p_sys->i_height = 144;
 268             break;
 269         case 1: /* CIF */
 270             p_sys->i_width  = 352;
 271             p_sys->i_height = 288;
 272             break;
 273         case 2: /* NTSC */
 274             p_sys->i_width  = 640;
 275             p_sys->i_height = 480;
 276             break;
 277         case 3: /* PAL */
 278             p_sys->i_width  = 704;
 279             p_sys->i_height = 576;
 280             break;
 281         case 4:
 282         default:
 283             p_sys->b_auto = true;
 284             break;
 285      }
 286
 287     /* tty handling */
 288     if( p_sys->b_tty )
 289     {
 290         GfxMode( p_sys->i_tty );
 291
 292         /* Set keyboard settings */
 293         if( tcgetattr(0, &p_vout->p_sys->old_termios) == -1 )
 294         {
 295             msg_Err( p_vout, "tcgetattr failed" );
 296         }
 297
 298         if( tcgetattr(0, &new_termios) == -1 )
 299         {
 300             msg_Err( p_vout, "tcgetattr failed" );
 301         }
 302
 303         /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 304         new_termios.c_lflag |= (ECHO | ECHOCTL); */
 305         new_termios.c_lflag &= ~ (ICANON);
 306         new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 307         new_termios.c_iflag = 0;
 308         new_termios.c_cc[VMIN] = 1;
 309         new_termios.c_cc[VTIME] = 0;
 310
 311         if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 312         {
 313             msg_Err( p_vout, "tcsetattr failed" );
 314         }
 315
 316         ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 317
 318         /* Set-up tty signal handler to be aware of tty changes */
 319         memset( &sig_tty, 0, sizeof( sig_tty ) );
 320         sig_tty.sa_handler = SwitchDisplay;
 321         sigemptyset( &sig_tty.sa_mask );
 322         if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 323             sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 324         {
 325             msg_Err( p_vout, "cannot set signal handler (%m)" );
 326             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 327             TextMode( p_sys->i_tty );
 328             free( p_vout->p_sys );
 329             return VLC_EGENERIC;
 330         }
 331
 332         /* Set-up tty according to new signal handler */
 333         if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 334         {
 335             msg_Err( p_vout, "cannot get terminal mode (%m)" );
 336             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 337             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 338             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 339             TextMode( p_sys->i_tty );
 340             free( p_vout->p_sys );
 341             return VLC_EGENERIC;
 342         }
 343         memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 344         vt_mode.mode   = VT_PROCESS;
 345         vt_mode.waitv  = 0;
 346         vt_mode.relsig = SIGUSR1;
 347         vt_mode.acqsig = SIGUSR2;
 348
 349         if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 350         {
 351             msg_Err( p_vout, "cannot set terminal mode (%m)" );
 352             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 353             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 354             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 355             TextMode( p_sys->i_tty );
 356             free( p_vout->p_sys );
 357             return VLC_EGENERIC;
 358         }
 359     }
 360
 361     if( OpenDisplay( p_vout ) )
 362     {
 363         if( p_sys->b_tty )
 364         {
 365             ioctl( p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 366             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 367             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 368             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 369             TextMode( p_sys->i_tty );
 370         }
 371         free( p_vout->p_sys );
 372         return VLC_EGENERIC;
 373     }
 374
 375     return VLC_SUCCESS;
 376 }
 377
 378
 379 /*****************************************************************************
 380  * Destroy: destroy FB video thread output method
 381  *****************************************************************************
 382  * Terminate an output method created by Create
 383  *****************************************************************************/
 384 static void Destroy( vlc_object_t *p_this )
 385 {
 386     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 387
 388     CloseDisplay( p_vout );
 389
 390     if( p_vout->p_sys->b_tty )
 391     {
 392         /* Reset the terminal */
 393         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 394
 395         /* Remove signal handlers */
 396         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 397         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 398
 399         /* Reset the keyboard state */
 400         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 401
 402         /* Return to text mode */
 403         TextMode( p_vout->p_sys->i_tty );
 404     }
 405
 406     /* Destroy structure */
 407     free( p_vout->p_sys );
 408 }
 409
 410 /*****************************************************************************
 411  * NewPicture: allocate a picture
 412  *****************************************************************************
 413  * Returns 0 on success, -1 otherwise
 414  *****************************************************************************/
 415 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 416 {
 417     /* We know the chroma, allocate a buffer which will be used
 418      * directly by the decoder */
 419     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 420     if( p_pic->p_sys == NULL )
 421     {
 422         return VLC_ENOMEM;
 423     }
 424
 425     /* Fill in picture_t fields */
 426     vout_InitPicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma,
 427                       p_vout->output.i_width, p_vout->output.i_height,
 428                       p_vout->output.i_aspect );
 429
 430     p_pic->p_sys->p_data = malloc( p_vout->p_sys->i_page_size );
 431     if( !p_pic->p_sys->p_data )
 432     {
 433         free( p_pic->p_sys );
 434         p_pic->p_sys = NULL;
 435         return VLC_ENOMEM;
 436     }
 437
 438     p_pic->p->p_pixels = (uint8_t*) p_pic->p_sys->p_data;
 439
 440     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 441     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 442     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 443
 444     if( p_vout->p_sys->var_info.xres_virtual )
 445     {
 446         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 447                              * p_vout->p_sys->i_bytes_per_pixel;
 448     }
 449     else
 450     {
 451         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 452                              * p_vout->p_sys->i_bytes_per_pixel;
 453     }
 454
 455     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 456                                  * p_vout->p_sys->i_bytes_per_pixel;
 457     p_pic->i_planes = 1;
 458
 459     return VLC_SUCCESS;
 460 }
 461
 462 /*****************************************************************************
 463  * FreePicture: destroy a picture allocated with NewPicture
 464  *****************************************************************************
 465  * Destroy Image AND associated data.
 466  *****************************************************************************/
 467 static void FreePicture( vout_thread_t *p_vout, picture_t *p_pic )
 468 {
 469     VLC_UNUSED(p_vout);
 470     free( p_pic->p_sys->p_data );
 471     free( p_pic->p_sys );
 472     p_pic->p_sys = NULL;
 473 }
 474
 475 /*****************************************************************************
 476  * Init: initialize framebuffer video thread output method
 477  *****************************************************************************/
 478 static int Init( vout_thread_t *p_vout )
 479 {
 480     vout_sys_t *p_sys = p_vout->p_sys;
 481     int i_index;
 482     picture_t *p_pic = NULL;
 483
 484     I_OUTPUTPICTURES = 0;
 485
 486     p_vout->output.i_width  = p_vout->render.i_width;
 487     p_vout->output.i_height = p_vout->render.i_height;
 488     p_vout->output.i_aspect = p_vout->render.i_aspect;
 489
 490     p_vout->fmt_out = p_vout->fmt_in;
 491     if( p_sys->i_chroma == 0 )
 492     {
 493         /* Initialize the output structure: RGB with square pixels, whatever
 494          * the input format is, since it's the only format we know */
 495         switch( p_sys->var_info.bits_per_pixel )
 496         {
 497         case 8: /* FIXME: set the palette */
 498             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 499         case 15:
 500             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 501         case 16:
 502             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 503         case 24:
 504             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 505         case 32:
 506             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 507         default:
 508             msg_Err( p_vout, "unknown screen depth %i",
 509                      p_vout->p_sys->var_info.bits_per_pixel );
 510             return VLC_EGENERIC;
 511         }
 512
 513         if( p_sys->var_info.bits_per_pixel != 8 )
 514         {
 515             p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 516                                  << p_sys->var_info.red.offset;
 517             p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 518                                  << p_sys->var_info.green.offset;
 519             p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 520                                  << p_sys->var_info.blue.offset;
 521         }
 522     }
 523     else
 524     {
 525         p_vout->output.i_chroma = p_sys->i_chroma;
 526     }
 527     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 528
 529     p_vout->output.i_width =
 530     p_vout->fmt_out.i_width =
 531     p_vout->fmt_out.i_visible_width = p_sys->i_width;
 532     p_vout->output.i_height =
 533     p_vout->fmt_out.i_height =
 534     p_vout->fmt_out.i_visible_height = p_sys->i_height;
 535
 536     /* Assume we have square pixels */
 537     if( p_sys->i_aspect < 0 )
 538     {
 539         p_vout->output.i_aspect = ( p_sys->i_width
 540                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 541     }
 542     else p_vout->output.i_aspect = p_sys->i_aspect;
 543
 544     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 545     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 546     p_vout->fmt_out.i_x_offset= p_vout->fmt_out.i_y_offset = 0;
 547
 548     /* Clear the screen */
 549     memset( p_sys->p_video, 0, p_sys->i_page_size );
 550
 551     if( !p_sys->b_hw_accel )
 552     {
 553         /* Try to initialize up to MAX_DIRECTBUFFERS direct buffers */
 554         while( I_OUTPUTPICTURES < MAX_DIRECTBUFFERS )
 555         {
 556             p_pic = NULL;
 557
 558             /* Find an empty picture slot */
 559             for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 560             {
 561                 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 562                 {
 563                     p_pic = p_vout->p_picture + i_index;
 564                     break;
 565                 }
 566             }
 567
 568             /* Allocate the picture */
 569             if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 570             {
 571                 break;
 572             }
 573
 574             p_pic->i_status = DESTROYED_PICTURE;
 575             p_pic->i_type   = DIRECT_PICTURE;
 576
 577             PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 578
 579             I_OUTPUTPICTURES++;
 580         }
 581     }
 582     else
 583     {
 584         /* Try to initialize 1 direct buffer */
 585         p_pic = NULL;
 586
 587         /* Find an empty picture slot */
 588         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 589         {
 590             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 591             {
 592                 p_pic = p_vout->p_picture + i_index;
 593                 break;
 594             }
 595         }
 596
 597         /* Allocate the picture */
 598         if( p_pic == NULL )
 599         {
 600             return VLC_EGENERIC;
 601         }
 602
 603         /* We know the chroma, allocate a buffer which will be used
 604         * directly by the decoder */
 605         p_pic->p->p_pixels = p_vout->p_sys->p_video;
 606         p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 607         p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 608         p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 609
 610         if( p_vout->p_sys->var_info.xres_virtual )
 611         {
 612             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 613                                 * p_vout->p_sys->i_bytes_per_pixel;
 614         }
 615         else
 616         {
 617             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 618                                 * p_vout->p_sys->i_bytes_per_pixel;
 619         }
 620
 621         p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 622                                     * p_vout->p_sys->i_bytes_per_pixel;
 623         p_pic->i_planes = 1;
 624         p_pic->i_status = DESTROYED_PICTURE;
 625         p_pic->i_type   = DIRECT_PICTURE;
 626
 627         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 628
 629         I_OUTPUTPICTURES++;
 630     }
 631
 632     return VLC_SUCCESS;
 633 }
 634
 635 /*****************************************************************************
 636  * End: terminate framebuffer video thread output method
 637  *****************************************************************************/
 638 static void End( vout_thread_t *p_vout )
 639 {
 640     if( !p_vout->p_sys->b_hw_accel )
 641     {
 642         int i_index;
 643
 644         /* Free the direct buffers we allocated */
 645         for( i_index = I_OUTPUTPICTURES ; i_index ; )
 646         {
 647             i_index--;
 648             FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
 649         }
 650
 651     }
 652     /* Clear the screen */
 653     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 654 }
 655
 656 /*****************************************************************************
 657  * Control: control facility for the vout
 658  *****************************************************************************/
 659 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 660 {
 661     switch( i_query )
 662     {
 663        default:
 664             return vout_vaControlDefault( p_vout, i_query, args );
 665     }
 666 }
 667
 668 /*****************************************************************************
 669  * Manage: handle FB events
 670  *****************************************************************************
 671  * This function should be called regularly by video output thread. It manages
 672  * console events. It returns a non null value on error.
 673  *****************************************************************************/
 674 static int Manage( vout_thread_t *p_vout )
 675 {
 676 #if 0
 677     uint8_t buf;
 678
 679     if ( read(0, &buf, 1) == 1)
 680     {
 681         switch( buf )
 682         {
 683         case 'q':
 684             vlc_object_kill( p_vout->p_libvlc );
 685             break;
 686
 687         default:
 688             break;
 689         }
 690     }
 691 #endif
 692
 693     /*
 694      * Size change
 695      */
 696     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 697     {
 698         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 699         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 700
 701         /* Destroy XImages to change their size */
 702         End( p_vout );
 703
 704         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 705         if( Init( p_vout ) )
 706         {
 707             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 708             return VLC_EGENERIC;
 709         }
 710
 711         /* Clear screen */
 712         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 713
 714 #if 0
 715         /* Tell the video output thread that it will need to rebuild YUV
 716          * tables. This is needed since conversion buffer size may have changed */
 717         p_vout->i_changes |= VOUT_YUV_CHANGE;
 718 #endif
 719     }
 720
 721     return VLC_SUCCESS;
 722 }
 723
 724 /*****************************************************************************
 725  * Display: displays previously rendered output
 726  *****************************************************************************
 727  * This function send the currently rendered image to FB image, waits until
 728  * it is displayed and switch the two rendering buffers, preparing next frame.
 729  *****************************************************************************/
 730 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 731 {
 732 static int panned=0;
 733     /* swap the two Y offsets if the drivers supports panning */
 734     if( p_vout->p_sys->b_pan )
 735     {
 736         p_vout->p_sys->var_info.yoffset = 0;
 737         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 738
 739         /* the X offset should be 0, but who knows ...
 740          * some other app might have played with the framebuffer */
 741         p_vout->p_sys->var_info.xoffset = 0;
 742
 743         if( panned < 0 )
 744         {
 745             ioctl( p_vout->p_sys->i_fd,
 746                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 747             panned++;
 748         }
 749     }
 750
 751     if( !p_vout->p_sys->b_hw_accel )
 752     {
 753         vlc_memcpy( p_vout->p_sys->p_video, p_pic->p->p_pixels,
 754                     p_vout->p_sys->i_page_size );
 755     }
 756 }
 757
 758 #if 0
 759 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 760                                                uint16_t *blue, uint16_t *transp )
 761 {
 762     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 763
 764     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 765 }
 766 #endif
 767
 768 /* following functions are local */
 769
 770 /*****************************************************************************
 771  * OpenDisplay: initialize framebuffer
 772  *****************************************************************************/
 773 static int OpenDisplay( vout_thread_t *p_vout )
 774 {
 775     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 776     char *psz_device;                             /* framebuffer device path */
 777     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 778
 779     /* Open framebuffer device */
 780     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 781     {
 782         msg_Err( p_vout, "don't know which fb device to open" );
 783         return VLC_EGENERIC;
 784     }
 785
 786     p_sys->i_fd = open( psz_device, O_RDWR);
 787     if( p_sys->i_fd == -1 )
 788     {
 789         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 790         free( psz_device );
 791         return VLC_EGENERIC;
 792     }
 793     free( psz_device );
 794     psz_device = NULL;
 795
 796     /* Get framebuffer device information */
 797     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 798     {
 799         msg_Err( p_vout, "cannot get fb info (%m)" );
 800         close( p_sys->i_fd );
 801         return VLC_EGENERIC;
 802     }
 803
 804     memcpy( &p_sys->old_info, &p_sys->var_info,
 805             sizeof( struct fb_var_screeninfo ) );
 806
 807     /* Get some info on the framebuffer itself */
 808     if( !p_sys->b_auto )
 809     {
 810         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 811         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 812         p_vout->fmt_out.i_width = p_sys->i_width;
 813         p_vout->fmt_out.i_height = p_sys->i_height;
 814     }
 815
 816     /* Set some attributes */
 817     p_sys->var_info.activate = p_sys->b_tty
 818                                ? FB_ACTIVATE_NXTOPEN
 819                                : FB_ACTIVATE_NOW;
 820     p_sys->var_info.xoffset =  0;
 821     p_sys->var_info.yoffset =  0;
 822
 823     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 824     {
 825         msg_Err( p_vout, "cannot set fb info (%m)" );
 826         close( p_sys->i_fd );
 827         return VLC_EGENERIC;
 828     }
 829
 830     /* Get some information again, in the definitive configuration */
 831     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 832          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 833     {
 834         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 835
 836         /* Restore fb config */
 837         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 838
 839         close( p_sys->i_fd );
 840         return VLC_EGENERIC;
 841     }
 842
 843     /* If the fb has limitations on mode change,
 844      * then keep the resolution of the fb */
 845     if( (p_sys->i_height != p_sys->var_info.yres) ||
 846         (p_sys->i_width != p_sys->var_info.xres) )
 847     {
 848         p_sys->b_auto = true;
 849         msg_Warn( p_vout,
 850                   "using framebuffer native resolution instead of requested (%ix%i)",
 851                   p_sys->i_width, p_sys->i_height );
 852     }
 853     p_sys->i_height = p_sys->var_info.yres;
 854     p_sys->i_width  = p_sys->var_info.xres_virtual
 855                                ? p_sys->var_info.xres_virtual
 856                                : p_sys->var_info.xres;
 857
 858     /* FIXME: if the image is full-size, it gets cropped on the left
 859      * because of the xres / xres_virtual slight difference */
 860     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 861              p_sys->var_info.xres, p_sys->var_info.yres,
 862              p_sys->var_info.xres_virtual,
 863              p_sys->var_info.yres_virtual,
 864              p_sys->i_width, p_sys->i_height );
 865
 866     p_sys->p_palette = NULL;
 867     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 868
 869     switch( p_sys->var_info.bits_per_pixel )
 870     {
 871     case 8:
 872         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 873         if( !p_sys->p_palette )
 874         {
 875             /* Restore fb config */
 876             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 877
 878             close( p_sys->i_fd );
 879             return VLC_ENOMEM;
 880         }
 881         p_sys->fb_cmap.start = 0;
 882         p_sys->fb_cmap.len = 256;
 883         p_sys->fb_cmap.red = p_sys->p_palette;
 884         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 885         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 886         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 887
 888         /* Save the colormap */
 889         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 890
 891         p_sys->i_bytes_per_pixel = 1;
 892         break;
 893
 894     case 15:
 895     case 16:
 896         p_sys->i_bytes_per_pixel = 2;
 897         break;
 898
 899     case 24:
 900         p_sys->i_bytes_per_pixel = 3;
 901         break;
 902
 903     case 32:
 904         p_sys->i_bytes_per_pixel = 4;
 905         break;
 906
 907     default:
 908         msg_Err( p_vout, "screen depth %d is not supported",
 909                          p_sys->var_info.bits_per_pixel );
 910
 911         /* Restore fb config */
 912         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 913
 914         close( p_sys->i_fd );
 915         return VLC_EGENERIC;
 916     }
 917
 918     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 919                          p_sys->i_bytes_per_pixel;
 920
 921     /* Map a framebuffer at the beginning */
 922     p_sys->p_video = mmap( 0, p_sys->i_page_size,
 923                               PROT_READ | PROT_WRITE, MAP_SHARED,
 924                               p_sys->i_fd, 0 );
 925
 926     if( p_sys->p_video == ((void*)-1) )
 927     {
 928         msg_Err( p_vout, "cannot map video memory (%m)" );
 929
 930         if( p_sys->var_info.bits_per_pixel == 8 )
 931         {
 932             free( p_sys->p_palette );
 933             p_sys->p_palette = NULL;
 934         }
 935
 936         /* Restore fb config */
 937         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 938
 939         close( p_sys->i_fd );
 940         return VLC_EGENERIC;
 941     }
 942
 943     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 944              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 945              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 946     return VLC_SUCCESS;
 947 }
 948
 949 /*****************************************************************************
 950  * CloseDisplay: terminate FB video thread output method
 951  *****************************************************************************/
 952 static void CloseDisplay( vout_thread_t *p_vout )
 953 {
 954     /* Clear display */
 955     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 956
 957     /* Restore palette */
 958     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 959     {
 960         ioctl( p_vout->p_sys->i_fd,
 961                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 962         free( p_vout->p_sys->p_palette );
 963         p_vout->p_sys->p_palette = NULL;
 964     }
 965
 966     /* Restore fb config */
 967     ioctl( p_vout->p_sys->i_fd,
 968            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 969
 970     /* Close fb */
 971     close( p_vout->p_sys->i_fd );
 972 }
 973
 974 /*****************************************************************************
 975  * SwitchDisplay: VT change signal handler
 976  *****************************************************************************
 977  * This function activates or deactivates the output of the thread. It is
 978  * called by the VT driver, on terminal change.
 979  *****************************************************************************/
 980 static void SwitchDisplay( int i_signal )
 981 {
 982     VLC_UNUSED( i_signal );
 983 #if 0
 984     vout_thread_t *p_vout;
 985
 986     vlc_mutex_lock( &p_vout_bank->lock );
 987
 988     /* XXX: only test the first video output */
 989     if( p_vout_bank->i_count )
 990     {
 991         p_vout = p_vout_bank->pp_vout[0];
 992
 993         switch( i_signal )
 994         {
 995         case SIGUSR1:                                /* vt has been released */
 996             p_vout->b_active = 0;
 997             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 998             break;
 999         case SIGUSR2:                                /* vt has been acquired */
1000             p_vout->b_active = 1;
1001             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
1002             /* handle blanking */
1003             vlc_mutex_lock( &p_vout->change_lock );
1004             p_vout->i_changes |= VOUT_SIZE_CHANGE;
1005             vlc_mutex_unlock( &p_vout->change_lock );
1006             break;
1007         }
1008     }
1009
1010     vlc_mutex_unlock( &p_vout_bank->lock );
1011 #endif
1012 }
1013
1014 /*****************************************************************************
1015  * TextMode and GfxMode : switch tty to text/graphic mode
1016  *****************************************************************************
1017  * These functions toggle the tty mode.
1018  *****************************************************************************/
1019 static void TextMode( int i_tty )
1020 {
1021     /* return to text mode */
1022     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
1023     {
1024         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
1025     }
1026 }
1027
1028 static void GfxMode( int i_tty )
1029 {
1030     /* switch to graphic mode */
1031     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
1032     {
1033         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
1034     }
1035 }