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