git.sesse.net Git - vlc/blob - modules/video_output/fb.c

   1 /*****************************************************************************
   2  * fb.c : framebuffer plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Jean-Paul Saman
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <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 = calloc( 1, sizeof( vout_sys_t ) );
 190     if( p_vout->p_sys == NULL )
 191         return VLC_ENOMEM;
 192
 193     p_sys->p_video = MAP_FAILED;
 194
 195     p_vout->pf_init = Init;
 196     p_vout->pf_end = End;
 197     p_vout->pf_manage = Manage;
 198     p_vout->pf_render = NULL;
 199     p_vout->pf_display = Display;
 200     p_vout->pf_control = Control;
 201
 202     /* Does the framebuffer uses hw acceleration? */
 203     p_sys->b_hw_accel = var_CreateGetBool( p_vout, "fb-hw-accel" );
 204
 205     /* Set tty and fb devices */
 206     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 207     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 208 #ifndef WIN32
 209 #if defined(HAVE_ISATTY)
 210     /* Check that stdin is a TTY */
 211     if( p_sys->b_tty && !isatty( 0 ) )
 212     {
 213         msg_Warn( p_vout, "fd 0 is not a TTY" );
 214         free( p_sys );
 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     }
 243
 244     p_sys->i_aspect = -1;
 245     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 246     if( psz_aspect )
 247     {
 248         char *psz_parser = strchr( psz_aspect, ':' );
 249
 250         if( psz_parser )
 251         {
 252             *psz_parser++ = '\0';
 253             p_sys->i_aspect = ( atoi( psz_aspect )
 254                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 255         }
 256         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 257                   atoi( psz_aspect ), atoi( psz_parser ) );
 258
 259         free( psz_aspect );
 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      }
 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         Destroy( VLC_OBJECT(p_vout) );
 364         return VLC_EGENERIC;
 365     }
 366
 367     return VLC_SUCCESS;
 368 }
 369
 370
 371 /*****************************************************************************
 372  * Destroy: destroy FB video thread output method
 373  *****************************************************************************
 374  * Terminate an output method created by Create
 375  *****************************************************************************/
 376 static void Destroy( vlc_object_t *p_this )
 377 {
 378     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 379
 380     CloseDisplay( p_vout );
 381
 382     if( p_vout->p_sys->b_tty )
 383     {
 384         /* Reset the terminal */
 385         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 386
 387         /* Remove signal handlers */
 388         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 389         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 390
 391         /* Reset the keyboard state */
 392         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 393
 394         /* Return to text mode */
 395         TextMode( p_vout->p_sys->i_tty );
 396     }
 397
 398     /* Destroy structure */
 399     free( p_vout->p_sys );
 400 }
 401
 402 /*****************************************************************************
 403  * NewPicture: allocate a picture
 404  *****************************************************************************
 405  * Returns 0 on success, -1 otherwise
 406  *****************************************************************************/
 407 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 408 {
 409     /* We know the chroma, allocate a buffer which will be used
 410      * directly by the decoder */
 411     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 412     if( p_pic->p_sys == NULL )
 413     {
 414         return VLC_ENOMEM;
 415     }
 416
 417     /* Fill in picture_t fields */
 418     vout_InitPicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma,
 419                       p_vout->output.i_width, p_vout->output.i_height,
 420                       p_vout->output.i_aspect );
 421
 422     p_pic->p_sys->p_data = malloc( p_vout->p_sys->i_page_size );
 423     if( !p_pic->p_sys->p_data )
 424     {
 425         free( p_pic->p_sys );
 426         p_pic->p_sys = NULL;
 427         return VLC_ENOMEM;
 428     }
 429
 430     p_pic->p->p_pixels = (uint8_t*) p_pic->p_sys->p_data;
 431
 432     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 433     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 434     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 435
 436     if( p_vout->p_sys->var_info.xres_virtual )
 437     {
 438         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 439                              * p_vout->p_sys->i_bytes_per_pixel;
 440     }
 441     else
 442     {
 443         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 444                              * p_vout->p_sys->i_bytes_per_pixel;
 445     }
 446
 447     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 448                                  * p_vout->p_sys->i_bytes_per_pixel;
 449     p_pic->i_planes = 1;
 450
 451     return VLC_SUCCESS;
 452 }
 453
 454 /*****************************************************************************
 455  * FreePicture: destroy a picture allocated with NewPicture
 456  *****************************************************************************
 457  * Destroy Image AND associated data.
 458  *****************************************************************************/
 459 static void FreePicture( vout_thread_t *p_vout, picture_t *p_pic )
 460 {
 461     VLC_UNUSED(p_vout);
 462     free( p_pic->p_sys->p_data );
 463     free( p_pic->p_sys );
 464     p_pic->p_sys = NULL;
 465 }
 466
 467 /*****************************************************************************
 468  * Init: initialize framebuffer video thread output method
 469  *****************************************************************************/
 470 static int Init( vout_thread_t *p_vout )
 471 {
 472     vout_sys_t *p_sys = p_vout->p_sys;
 473     int i_index;
 474     picture_t *p_pic = NULL;
 475
 476     I_OUTPUTPICTURES = 0;
 477
 478     p_vout->output.i_width  = p_vout->render.i_width;
 479     p_vout->output.i_height = p_vout->render.i_height;
 480     p_vout->output.i_aspect = p_vout->render.i_aspect;
 481
 482     p_vout->fmt_out = p_vout->fmt_in;
 483     if( p_sys->i_chroma == 0 )
 484     {
 485         /* Initialize the output structure: RGB with square pixels, whatever
 486          * the input format is, since it's the only format we know */
 487         switch( p_sys->var_info.bits_per_pixel )
 488         {
 489         case 8: /* FIXME: set the palette */
 490             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 491         case 15:
 492             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 493         case 16:
 494             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 495         case 24:
 496             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 497         case 32:
 498             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 499         default:
 500             msg_Err( p_vout, "unknown screen depth %i",
 501                      p_vout->p_sys->var_info.bits_per_pixel );
 502             return VLC_EGENERIC;
 503         }
 504
 505         if( p_sys->var_info.bits_per_pixel != 8 )
 506         {
 507             p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 508                                  << p_sys->var_info.red.offset;
 509             p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 510                                  << p_sys->var_info.green.offset;
 511             p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 512                                  << p_sys->var_info.blue.offset;
 513         }
 514     }
 515     else
 516     {
 517         p_vout->output.i_chroma = p_sys->i_chroma;
 518     }
 519     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 520
 521     p_vout->output.i_width =
 522     p_vout->fmt_out.i_width =
 523     p_vout->fmt_out.i_visible_width = p_sys->i_width;
 524     p_vout->output.i_height =
 525     p_vout->fmt_out.i_height =
 526     p_vout->fmt_out.i_visible_height = p_sys->i_height;
 527
 528     /* Assume we have square pixels */
 529     if( p_sys->i_aspect < 0 )
 530     {
 531         p_vout->output.i_aspect = ( p_sys->i_width
 532                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 533     }
 534     else p_vout->output.i_aspect = p_sys->i_aspect;
 535
 536     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 537     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 538     p_vout->fmt_out.i_x_offset= p_vout->fmt_out.i_y_offset = 0;
 539
 540     /* Clear the screen */
 541     memset( p_sys->p_video, 0, p_sys->i_page_size );
 542
 543     if( !p_sys->b_hw_accel )
 544     {
 545         /* Try to initialize up to MAX_DIRECTBUFFERS direct buffers */
 546         while( I_OUTPUTPICTURES < MAX_DIRECTBUFFERS )
 547         {
 548             p_pic = NULL;
 549
 550             /* Find an empty picture slot */
 551             for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 552             {
 553                 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 554                 {
 555                     p_pic = p_vout->p_picture + i_index;
 556                     break;
 557                 }
 558             }
 559
 560             /* Allocate the picture */
 561             if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 562             {
 563                 break;
 564             }
 565
 566             p_pic->i_status = DESTROYED_PICTURE;
 567             p_pic->i_type   = DIRECT_PICTURE;
 568
 569             PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 570
 571             I_OUTPUTPICTURES++;
 572         }
 573     }
 574     else
 575     {
 576         /* Try to initialize 1 direct buffer */
 577         p_pic = NULL;
 578
 579         /* Find an empty picture slot */
 580         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 581         {
 582             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 583             {
 584                 p_pic = p_vout->p_picture + i_index;
 585                 break;
 586             }
 587         }
 588
 589         /* Allocate the picture */
 590         if( p_pic == NULL )
 591         {
 592             return VLC_EGENERIC;
 593         }
 594
 595         /* We know the chroma, allocate a buffer which will be used
 596         * directly by the decoder */
 597         p_pic->p->p_pixels = p_vout->p_sys->p_video;
 598         p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 599         p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 600         p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 601
 602         if( p_vout->p_sys->var_info.xres_virtual )
 603         {
 604             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 605                                 * p_vout->p_sys->i_bytes_per_pixel;
 606         }
 607         else
 608         {
 609             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 610                                 * p_vout->p_sys->i_bytes_per_pixel;
 611         }
 612
 613         p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 614                                     * p_vout->p_sys->i_bytes_per_pixel;
 615         p_pic->i_planes = 1;
 616         p_pic->i_status = DESTROYED_PICTURE;
 617         p_pic->i_type   = DIRECT_PICTURE;
 618
 619         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 620
 621         I_OUTPUTPICTURES++;
 622     }
 623
 624     return VLC_SUCCESS;
 625 }
 626
 627 /*****************************************************************************
 628  * End: terminate framebuffer video thread output method
 629  *****************************************************************************/
 630 static void End( vout_thread_t *p_vout )
 631 {
 632     if( !p_vout->p_sys->b_hw_accel )
 633     {
 634         int i_index;
 635
 636         /* Free the direct buffers we allocated */
 637         for( i_index = I_OUTPUTPICTURES ; i_index ; )
 638         {
 639             i_index--;
 640             FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
 641         }
 642
 643     }
 644     /* Clear the screen */
 645     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 646 }
 647
 648 /*****************************************************************************
 649  * Control: control facility for the vout
 650  *****************************************************************************/
 651 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 652 {
 653     (void) p_vout; (void) i_query; (void) args;
 654     return VLC_EGENERIC;
 655 }
 656
 657 /*****************************************************************************
 658  * Manage: handle FB events
 659  *****************************************************************************
 660  * This function should be called regularly by video output thread. It manages
 661  * console events. It returns a non null value on error.
 662  *****************************************************************************/
 663 static int Manage( vout_thread_t *p_vout )
 664 {
 665 #if 0
 666     uint8_t buf;
 667
 668     if ( read(0, &buf, 1) == 1)
 669     {
 670         switch( buf )
 671         {
 672         case 'q':
 673             libvlc_Quit( p_vout->p_libvlc );
 674             break;
 675
 676         default:
 677             break;
 678         }
 679     }
 680 #endif
 681
 682     /*
 683      * Size change
 684      */
 685     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 686     {
 687         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 688         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 689
 690         /* Destroy XImages to change their size */
 691         End( p_vout );
 692
 693         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 694         if( Init( p_vout ) )
 695         {
 696             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 697             return VLC_EGENERIC;
 698         }
 699
 700         /* Clear screen */
 701         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 702
 703 #if 0
 704         /* Tell the video output thread that it will need to rebuild YUV
 705          * tables. This is needed since conversion buffer size may have changed */
 706         p_vout->i_changes |= VOUT_YUV_CHANGE;
 707 #endif
 708     }
 709
 710     return VLC_SUCCESS;
 711 }
 712
 713 /*****************************************************************************
 714  * Display: displays previously rendered output
 715  *****************************************************************************
 716  * This function send the currently rendered image to FB image, waits until
 717  * it is displayed and switch the two rendering buffers, preparing next frame.
 718  *****************************************************************************/
 719 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 720 {
 721 static int panned=0;
 722     /* swap the two Y offsets if the drivers supports panning */
 723     if( p_vout->p_sys->b_pan )
 724     {
 725         p_vout->p_sys->var_info.yoffset = 0;
 726         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 727
 728         /* the X offset should be 0, but who knows ...
 729          * some other app might have played with the framebuffer */
 730         p_vout->p_sys->var_info.xoffset = 0;
 731
 732         if( panned < 0 )
 733         {
 734             ioctl( p_vout->p_sys->i_fd,
 735                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 736             panned++;
 737         }
 738     }
 739
 740     if( !p_vout->p_sys->b_hw_accel )
 741     {
 742         vlc_memcpy( p_vout->p_sys->p_video, p_pic->p->p_pixels,
 743                     p_vout->p_sys->i_page_size );
 744     }
 745 }
 746
 747 #if 0
 748 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 749                                                uint16_t *blue, uint16_t *transp )
 750 {
 751     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 752
 753     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 754 }
 755 #endif
 756
 757 /* following functions are local */
 758
 759 /*****************************************************************************
 760  * OpenDisplay: initialize framebuffer
 761  *****************************************************************************/
 762 static int OpenDisplay( vout_thread_t *p_vout )
 763 {
 764     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 765     char *psz_device;                             /* framebuffer device path */
 766     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 767
 768     /* Open framebuffer device */
 769     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 770     {
 771         msg_Err( p_vout, "don't know which fb device to open" );
 772         return VLC_EGENERIC;
 773     }
 774
 775     p_sys->i_fd = open( psz_device, O_RDWR);
 776     if( p_sys->i_fd == -1 )
 777     {
 778         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 779         free( psz_device );
 780         return VLC_EGENERIC;
 781     }
 782     free( psz_device );
 783
 784     /* Get framebuffer device information */
 785     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 786     {
 787         msg_Err( p_vout, "cannot get fb info (%m)" );
 788         close( p_sys->i_fd );
 789         return VLC_EGENERIC;
 790     }
 791
 792     memcpy( &p_sys->old_info, &p_sys->var_info,
 793             sizeof( struct fb_var_screeninfo ) );
 794
 795     /* Get some info on the framebuffer itself */
 796     if( !p_sys->b_auto )
 797     {
 798         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 799         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 800         p_vout->fmt_out.i_width = p_sys->i_width;
 801         p_vout->fmt_out.i_height = p_sys->i_height;
 802     }
 803
 804     /* Set some attributes */
 805     p_sys->var_info.activate = p_sys->b_tty
 806                                ? FB_ACTIVATE_NXTOPEN
 807                                : FB_ACTIVATE_NOW;
 808     p_sys->var_info.xoffset =  0;
 809     p_sys->var_info.yoffset =  0;
 810
 811     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 812     {
 813         msg_Err( p_vout, "cannot set fb info (%m)" );
 814         close( p_sys->i_fd );
 815         return VLC_EGENERIC;
 816     }
 817
 818     /* Get some information again, in the definitive configuration */
 819     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 820          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 821     {
 822         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 823
 824         /* Restore fb config */
 825         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 826
 827         close( p_sys->i_fd );
 828         return VLC_EGENERIC;
 829     }
 830
 831     /* If the fb has limitations on mode change,
 832      * then keep the resolution of the fb */
 833     if( (p_sys->i_height != p_sys->var_info.yres) ||
 834         (p_sys->i_width != p_sys->var_info.xres) )
 835     {
 836         p_sys->b_auto = true;
 837         msg_Warn( p_vout,
 838                   "using framebuffer native resolution instead of requested (%ix%i)",
 839                   p_sys->i_width, p_sys->i_height );
 840     }
 841     p_sys->i_height = p_sys->var_info.yres;
 842     p_sys->i_width  = p_sys->var_info.xres_virtual
 843                                ? p_sys->var_info.xres_virtual
 844                                : p_sys->var_info.xres;
 845
 846     /* FIXME: if the image is full-size, it gets cropped on the left
 847      * because of the xres / xres_virtual slight difference */
 848     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 849              p_sys->var_info.xres, p_sys->var_info.yres,
 850              p_sys->var_info.xres_virtual,
 851              p_sys->var_info.yres_virtual,
 852              p_sys->i_width, p_sys->i_height );
 853
 854     p_sys->p_palette = NULL;
 855     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 856
 857     switch( p_sys->var_info.bits_per_pixel )
 858     {
 859     case 8:
 860         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 861         if( !p_sys->p_palette )
 862         {
 863             /* Restore fb config */
 864             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 865
 866             close( p_sys->i_fd );
 867             return VLC_ENOMEM;
 868         }
 869         p_sys->fb_cmap.start = 0;
 870         p_sys->fb_cmap.len = 256;
 871         p_sys->fb_cmap.red = p_sys->p_palette;
 872         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 873         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 874         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 875
 876         /* Save the colormap */
 877         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 878
 879         p_sys->i_bytes_per_pixel = 1;
 880         break;
 881
 882     case 15:
 883     case 16:
 884         p_sys->i_bytes_per_pixel = 2;
 885         break;
 886
 887     case 24:
 888         p_sys->i_bytes_per_pixel = 3;
 889         break;
 890
 891     case 32:
 892         p_sys->i_bytes_per_pixel = 4;
 893         break;
 894
 895     default:
 896         msg_Err( p_vout, "screen depth %d is not supported",
 897                          p_sys->var_info.bits_per_pixel );
 898
 899         /* Restore fb config */
 900         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 901
 902         close( p_sys->i_fd );
 903         return VLC_EGENERIC;
 904     }
 905
 906     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 907                          p_sys->i_bytes_per_pixel;
 908
 909     /* Map a framebuffer at the beginning */
 910     p_sys->p_video = mmap( NULL, p_sys->i_page_size,
 911                               PROT_READ | PROT_WRITE, MAP_SHARED,
 912                               p_sys->i_fd, 0 );
 913
 914     if( p_sys->p_video == MAP_FAILED )
 915     {
 916         msg_Err( p_vout, "cannot map video memory (%m)" );
 917
 918         if( p_sys->var_info.bits_per_pixel == 8 )
 919         {
 920             free( p_sys->p_palette );
 921             p_sys->p_palette = NULL;
 922         }
 923
 924         /* Restore fb config */
 925         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 926
 927         close( p_sys->i_fd );
 928         return VLC_EGENERIC;
 929     }
 930
 931     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 932              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 933              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 934     return VLC_SUCCESS;
 935 }
 936
 937 /*****************************************************************************
 938  * CloseDisplay: terminate FB video thread output method
 939  *****************************************************************************/
 940 static void CloseDisplay( vout_thread_t *p_vout )
 941 {
 942     if( p_vout->p_sys->p_video != MAP_FAILED )
 943     {
 944         /* Clear display */
 945         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 946         munmap( p_vout->p_sys->p_video, p_vout->p_sys->i_page_size );
 947     }
 948
 949     if( p_vout->p_sys->i_fd >= 0 )
 950     {
 951         /* Restore palette */
 952         if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 953         {
 954             ioctl( p_vout->p_sys->i_fd,
 955                    FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 956             free( p_vout->p_sys->p_palette );
 957             p_vout->p_sys->p_palette = NULL;
 958         }
 959
 960         /* Restore fb config */
 961         ioctl( p_vout->p_sys->i_fd,
 962                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 963
 964         /* Close fb */
 965         close( p_vout->p_sys->i_fd );
 966     }
 967 }
 968
 969 /*****************************************************************************
 970  * SwitchDisplay: VT change signal handler
 971  *****************************************************************************
 972  * This function activates or deactivates the output of the thread. It is
 973  * called by the VT driver, on terminal change.
 974  *****************************************************************************/
 975 static void SwitchDisplay( int i_signal )
 976 {
 977     VLC_UNUSED( i_signal );
 978 #if 0
 979     vout_thread_t *p_vout;
 980
 981     vlc_mutex_lock( &p_vout_bank->lock );
 982
 983     /* XXX: only test the first video output */
 984     if( p_vout_bank->i_count )
 985     {
 986         p_vout = p_vout_bank->pp_vout[0];
 987
 988         switch( i_signal )
 989         {
 990         case SIGUSR1:                                /* vt has been released */
 991             p_vout->b_active = 0;
 992             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 993             break;
 994         case SIGUSR2:                                /* vt has been acquired */
 995             p_vout->b_active = 1;
 996             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 997             /* handle blanking */
 998             vlc_mutex_lock( &p_vout->change_lock );
 999             p_vout->i_changes |= VOUT_SIZE_CHANGE;
1000             vlc_mutex_unlock( &p_vout->change_lock );
1001             break;
1002         }
1003     }
1004
1005     vlc_mutex_unlock( &p_vout_bank->lock );
1006 #endif
1007 }
1008
1009 /*****************************************************************************
1010  * TextMode and GfxMode : switch tty to text/graphic mode
1011  *****************************************************************************
1012  * These functions toggle the tty mode.
1013  *****************************************************************************/
1014 static void TextMode( int i_tty )
1015 {
1016     /* return to text mode */
1017     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
1018     {
1019         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
1020     }
1021 }
1022
1023 static void GfxMode( int i_tty )
1024 {
1025     /* switch to graphic mode */
1026     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
1027     {
1028         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
1029     }
1030 }