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

   1 /*****************************************************************************
   2  * fb.c : framebuffer plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Jean-Paul Saman
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <errno.h>                                                 /* ENOMEM */
  34 #include <signal.h>                                      /* SIGUSR1, SIGUSR2 */
  35 #include <fcntl.h>                                                 /* open() */
  36 #include <unistd.h>                                               /* close() */
  37
  38 #include <termios.h>                                       /* struct termios */
  39 #include <sys/ioctl.h>
  40 #include <sys/mman.h>                                              /* mmap() */
  41
  42 #include <linux/fb.h>
  43 #include <linux/vt.h>                                                /* VT_* */
  44 #include <linux/kd.h>                                                 /* KD* */
  45
  46 #include <vlc_common.h>
  47 #include <vlc_plugin.h>
  48 #include <vlc_vout.h>
  49 #include <vlc_interface.h>
  50
  51 /*****************************************************************************
  52  * Local prototypes
  53  *****************************************************************************/
  54 static int  Create    ( vlc_object_t * );
  55 static void Destroy   ( vlc_object_t * );
  56
  57 static int  Init      ( vout_thread_t * );
  58 static void End       ( vout_thread_t * );
  59 static int  Manage    ( vout_thread_t * );
  60 static void Display   ( vout_thread_t *, picture_t * );
  61 static int  Control   ( vout_thread_t *, int, va_list );
  62
  63 static int  NewPicture     ( vout_thread_t *, picture_t * );
  64 static void FreePicture    ( vout_thread_t *, picture_t * );
  65
  66 static int  OpenDisplay    ( vout_thread_t * );
  67 static void CloseDisplay   ( vout_thread_t * );
  68 static void SwitchDisplay  ( int i_signal );
  69 static void TextMode       ( int i_tty );
  70 static void GfxMode        ( int i_tty );
  71
  72 #define MAX_DIRECTBUFFERS 1
  73
  74 /*****************************************************************************
  75  * Module descriptor
  76  *****************************************************************************/
  77 #define FB_DEV_VAR "fbdev"
  78
  79 #define DEVICE_TEXT N_("Framebuffer device")
  80 #define DEVICE_LONGTEXT N_( \
  81     "Framebuffer device to use for rendering (usually /dev/fb0).")
  82
  83 #define TTY_TEXT N_("Run fb on current tty.")
  84 #define TTY_LONGTEXT N_( \
  85     "Run framebuffer on current TTY device (default enabled). " \
  86     "(disable tty handling with caution)" )
  87
  88 #define CHROMA_TEXT N_("Chroma used.")
  89 #define CHROMA_LONGTEXT N_( \
  90     "Force use of a specific chroma for output. Default is I420." )
  91
  92 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  93 #define ASPECT_RATIO_LONGTEXT N_( \
  94     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  95
  96 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  97 #define FB_MODE_LONGTEXT N_( \
  98     "Select the resolution for the framebuffer. Currently it supports " \
  99     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
 100
 101 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration.")
 102 #define HW_ACCEL_LONGTEXT N_( \
 103     "If your framebuffer supports hardware acceleration or does double buffering " \
 104     "in hardware then you must disable this option. It then does double buffering " \
 105     "in software." )
 106
 107 vlc_module_begin ()
 108     set_shortname( "Framebuffer" )
 109     set_category( CAT_VIDEO )
 110     set_subcategory( SUBCAT_VIDEO_VOUT )
 111     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
 112               false );
 113     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, true )
 114     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 115                 true );
 116     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
 117                 ASPECT_RATIO_LONGTEXT, true );
 118     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
 119                  true );
 120     add_bool( "fb-hw-accel", true, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
 121               true );
 122     set_description( N_("GNU/Linux framebuffer video output") )
 123     set_capability( "video output", 30 )
 124     set_callbacks( Create, Destroy )
 125 vlc_module_end ()
 126
 127 /*****************************************************************************
 128  * vout_sys_t: video output framebuffer method descriptor
 129  *****************************************************************************
 130  * This structure is part of the video output thread descriptor.
 131  * It describes the FB specific properties of an output thread.
 132  *****************************************************************************/
 133 struct vout_sys_t
 134 {
 135     /* System information */
 136     int                 i_tty;                          /* tty device handle */
 137     bool                b_tty;
 138     struct termios      old_termios;
 139
 140     /* Original configuration information */
 141     struct sigaction            sig_usr1;           /* USR1 previous handler */
 142     struct sigaction            sig_usr2;           /* USR2 previous handler */
 143     struct vt_mode              vt_mode;                 /* previous VT mode */
 144
 145     /* Framebuffer information */
 146     int                         i_fd;                       /* device handle */
 147     struct fb_var_screeninfo    old_info;       /* original mode information */
 148     struct fb_var_screeninfo    var_info;        /* current mode information */
 149     bool                        b_pan;     /* does device supports panning ? */
 150     struct fb_cmap              fb_cmap;                /* original colormap */
 151     uint16_t                    *p_palette;              /* original palette */
 152     bool                        b_hw_accel;          /* has hardware support */
 153
 154     /* Video information */
 155     uint32_t i_width;
 156     uint32_t i_height;
 157     int      i_aspect;
 158     int      i_bytes_per_pixel;
 159     bool     b_auto;       /* Automatically adjust video size to fb size */
 160     vlc_fourcc_t i_chroma;
 161
 162     /* Video memory */
 163     uint8_t    *p_video;                                      /* base adress */
 164     size_t      i_page_size;                                    /* page size */
 165 };
 166
 167 struct picture_sys_t
 168 {
 169     uint8_t *    p_data;                                      /* base adress */
 170 };
 171
 172 /*****************************************************************************
 173  * Create: allocates FB video thread output method
 174  *****************************************************************************
 175  * This function allocates and initializes a FB vout method.
 176  *****************************************************************************/
 177 static int Create( vlc_object_t *p_this )
 178 {
 179     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 180     vout_sys_t    *p_sys;
 181     char          *psz_chroma;
 182     char          *psz_aspect;
 183     int           i_mode;
 184     struct sigaction    sig_tty;                 /* sigaction for tty change */
 185     struct vt_mode      vt_mode;                          /* vt current mode */
 186     struct termios      new_termios;
 187
 188     /* Allocate instance and initialize some members */
 189     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 190     if( p_vout->p_sys == NULL )
 191         return VLC_ENOMEM;
 192     memset( p_sys, 0, sizeof(vout_sys_t) );
 193
 194     p_vout->pf_init = Init;
 195     p_vout->pf_end = End;
 196     p_vout->pf_manage = Manage;
 197     p_vout->pf_render = NULL;
 198     p_vout->pf_display = Display;
 199     p_vout->pf_control = Control;
 200
 201     /* Does the framebuffer uses hw acceleration? */
 202     p_sys->b_hw_accel = var_CreateGetBool( p_vout, "fb-hw-accel" );
 203
 204     /* Set tty and fb devices */
 205     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 206     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 207 #ifndef WIN32
 208 #if defined(HAVE_ISATTY)
 209     /* Check that stdin is a TTY */
 210     if( p_sys->b_tty && !isatty( 0 ) )
 211     {
 212         msg_Warn( p_vout, "fd 0 is not a TTY" );
 213         return VLC_EGENERIC;
 214     }
 215     else
 216     {
 217         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 218                           "there is no way to return to the tty." );
 219     }
 220 #endif
 221 #endif
 222
 223     psz_chroma = var_CreateGetNonEmptyString( p_vout, "fb-chroma" );
 224     if( psz_chroma )
 225     {
 226         if( strlen( psz_chroma ) == 4 )
 227         {
 228             p_sys->i_chroma = VLC_FOURCC( psz_chroma[0],
 229                                    psz_chroma[1],
 230                                    psz_chroma[2],
 231                                    psz_chroma[3] );
 232             msg_Dbg( p_vout, "forcing chroma '%s'", psz_chroma );
 233         }
 234         else
 235         {
 236             msg_Warn( p_vout, "invalid chroma (%s), using defaults.",
 237                       psz_chroma );
 238         }
 239         free( psz_chroma );
 240         psz_chroma = NULL;
 241     }
 242
 243     p_sys->i_aspect = -1;
 244     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 245     if( psz_aspect )
 246     {
 247         char *psz_parser = strchr( psz_aspect, ':' );
 248
 249         if( psz_parser )
 250         {
 251             *psz_parser++ = '\0';
 252             p_sys->i_aspect = ( atoi( psz_aspect )
 253                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 254         }
 255         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 256                   atoi( psz_aspect ), atoi( psz_parser ) );
 257
 258         free( psz_aspect );
 259         psz_aspect = NULL;
 260     }
 261
 262     p_sys->b_auto = false;
 263     i_mode = var_CreateGetInteger( p_vout, "fb-mode" );
 264     switch( i_mode )
 265     {
 266         case 0: /* QCIF */
 267             p_sys->i_width  = 176;
 268             p_sys->i_height = 144;
 269             break;
 270         case 1: /* CIF */
 271             p_sys->i_width  = 352;
 272             p_sys->i_height = 288;
 273             break;
 274         case 2: /* NTSC */
 275             p_sys->i_width  = 640;
 276             p_sys->i_height = 480;
 277             break;
 278         case 3: /* PAL */
 279             p_sys->i_width  = 704;
 280             p_sys->i_height = 576;
 281             break;
 282         case 4:
 283         default:
 284             p_sys->b_auto = true;
 285             break;
 286      }
 287
 288     /* tty handling */
 289     if( p_sys->b_tty )
 290     {
 291         GfxMode( p_sys->i_tty );
 292
 293         /* Set keyboard settings */
 294         if( tcgetattr(0, &p_vout->p_sys->old_termios) == -1 )
 295         {
 296             msg_Err( p_vout, "tcgetattr failed" );
 297         }
 298
 299         if( tcgetattr(0, &new_termios) == -1 )
 300         {
 301             msg_Err( p_vout, "tcgetattr failed" );
 302         }
 303
 304         /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 305         new_termios.c_lflag |= (ECHO | ECHOCTL); */
 306         new_termios.c_lflag &= ~ (ICANON);
 307         new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 308         new_termios.c_iflag = 0;
 309         new_termios.c_cc[VMIN] = 1;
 310         new_termios.c_cc[VTIME] = 0;
 311
 312         if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 313         {
 314             msg_Err( p_vout, "tcsetattr failed" );
 315         }
 316
 317         ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 318
 319         /* Set-up tty signal handler to be aware of tty changes */
 320         memset( &sig_tty, 0, sizeof( sig_tty ) );
 321         sig_tty.sa_handler = SwitchDisplay;
 322         sigemptyset( &sig_tty.sa_mask );
 323         if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 324             sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 325         {
 326             msg_Err( p_vout, "cannot set signal handler (%m)" );
 327             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 328             TextMode( p_sys->i_tty );
 329             free( p_vout->p_sys );
 330             return VLC_EGENERIC;
 331         }
 332
 333         /* Set-up tty according to new signal handler */
 334         if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 335         {
 336             msg_Err( p_vout, "cannot get terminal mode (%m)" );
 337             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 338             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 339             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 340             TextMode( p_sys->i_tty );
 341             free( p_vout->p_sys );
 342             return VLC_EGENERIC;
 343         }
 344         memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 345         vt_mode.mode   = VT_PROCESS;
 346         vt_mode.waitv  = 0;
 347         vt_mode.relsig = SIGUSR1;
 348         vt_mode.acqsig = SIGUSR2;
 349
 350         if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 351         {
 352             msg_Err( p_vout, "cannot set terminal mode (%m)" );
 353             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 354             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 355             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 356             TextMode( p_sys->i_tty );
 357             free( p_vout->p_sys );
 358             return VLC_EGENERIC;
 359         }
 360     }
 361
 362     if( OpenDisplay( p_vout ) )
 363     {
 364         if( p_sys->b_tty )
 365         {
 366             ioctl( p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 367             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 368             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 369             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 370             TextMode( p_sys->i_tty );
 371         }
 372         free( p_vout->p_sys );
 373         return VLC_EGENERIC;
 374     }
 375
 376     return VLC_SUCCESS;
 377 }
 378
 379
 380 /*****************************************************************************
 381  * Destroy: destroy FB video thread output method
 382  *****************************************************************************
 383  * Terminate an output method created by Create
 384  *****************************************************************************/
 385 static void Destroy( vlc_object_t *p_this )
 386 {
 387     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 388
 389     CloseDisplay( p_vout );
 390
 391     if( p_vout->p_sys->b_tty )
 392     {
 393         /* Reset the terminal */
 394         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 395
 396         /* Remove signal handlers */
 397         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 398         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 399
 400         /* Reset the keyboard state */
 401         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 402
 403         /* Return to text mode */
 404         TextMode( p_vout->p_sys->i_tty );
 405     }
 406
 407     /* Destroy structure */
 408     free( p_vout->p_sys );
 409 }
 410
 411 /*****************************************************************************
 412  * NewPicture: allocate a picture
 413  *****************************************************************************
 414  * Returns 0 on success, -1 otherwise
 415  *****************************************************************************/
 416 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 417 {
 418     /* We know the chroma, allocate a buffer which will be used
 419      * directly by the decoder */
 420     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 421     if( p_pic->p_sys == NULL )
 422     {
 423         return VLC_ENOMEM;
 424     }
 425
 426     /* Fill in picture_t fields */
 427     vout_InitPicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma,
 428                       p_vout->output.i_width, p_vout->output.i_height,
 429                       p_vout->output.i_aspect );
 430
 431     p_pic->p_sys->p_data = malloc( p_vout->p_sys->i_page_size );
 432     if( !p_pic->p_sys->p_data )
 433     {
 434         free( p_pic->p_sys );
 435         p_pic->p_sys = NULL;
 436         return VLC_ENOMEM;
 437     }
 438
 439     p_pic->p->p_pixels = (uint8_t*) p_pic->p_sys->p_data;
 440
 441     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 442     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 443     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 444
 445     if( p_vout->p_sys->var_info.xres_virtual )
 446     {
 447         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 448                              * p_vout->p_sys->i_bytes_per_pixel;
 449     }
 450     else
 451     {
 452         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 453                              * p_vout->p_sys->i_bytes_per_pixel;
 454     }
 455
 456     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 457                                  * p_vout->p_sys->i_bytes_per_pixel;
 458     p_pic->i_planes = 1;
 459
 460     return VLC_SUCCESS;
 461 }
 462
 463 /*****************************************************************************
 464  * FreePicture: destroy a picture allocated with NewPicture
 465  *****************************************************************************
 466  * Destroy Image AND associated data.
 467  *****************************************************************************/
 468 static void FreePicture( vout_thread_t *p_vout, picture_t *p_pic )
 469 {
 470     VLC_UNUSED(p_vout);
 471     free( p_pic->p_sys->p_data );
 472     free( p_pic->p_sys );
 473     p_pic->p_sys = NULL;
 474 }
 475
 476 /*****************************************************************************
 477  * Init: initialize framebuffer video thread output method
 478  *****************************************************************************/
 479 static int Init( vout_thread_t *p_vout )
 480 {
 481     vout_sys_t *p_sys = p_vout->p_sys;
 482     int i_index;
 483     picture_t *p_pic = NULL;
 484
 485     I_OUTPUTPICTURES = 0;
 486
 487     p_vout->output.i_width  = p_vout->render.i_width;
 488     p_vout->output.i_height = p_vout->render.i_height;
 489     p_vout->output.i_aspect = p_vout->render.i_aspect;
 490
 491     p_vout->fmt_out = p_vout->fmt_in;
 492     if( p_sys->i_chroma == 0 )
 493     {
 494         /* Initialize the output structure: RGB with square pixels, whatever
 495          * the input format is, since it's the only format we know */
 496         switch( p_sys->var_info.bits_per_pixel )
 497         {
 498         case 8: /* FIXME: set the palette */
 499             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2'); break;
 500         case 15:
 501             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
 502         case 16:
 503             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
 504         case 24:
 505             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
 506         case 32:
 507             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
 508         default:
 509             msg_Err( p_vout, "unknown screen depth %i",
 510                      p_vout->p_sys->var_info.bits_per_pixel );
 511             return VLC_EGENERIC;
 512         }
 513
 514         if( p_sys->var_info.bits_per_pixel != 8 )
 515         {
 516             p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 517                                  << p_sys->var_info.red.offset;
 518             p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 519                                  << p_sys->var_info.green.offset;
 520             p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 521                                  << p_sys->var_info.blue.offset;
 522         }
 523     }
 524     else
 525     {
 526         p_vout->output.i_chroma = p_sys->i_chroma;
 527     }
 528     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 529
 530     p_vout->output.i_width =
 531     p_vout->fmt_out.i_width =
 532     p_vout->fmt_out.i_visible_width = p_sys->i_width;
 533     p_vout->output.i_height =
 534     p_vout->fmt_out.i_height =
 535     p_vout->fmt_out.i_visible_height = p_sys->i_height;
 536
 537     /* Assume we have square pixels */
 538     if( p_sys->i_aspect < 0 )
 539     {
 540         p_vout->output.i_aspect = ( p_sys->i_width
 541                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 542     }
 543     else p_vout->output.i_aspect = p_sys->i_aspect;
 544
 545     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 546     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 547     p_vout->fmt_out.i_x_offset= p_vout->fmt_out.i_y_offset = 0;
 548
 549     /* Clear the screen */
 550     memset( p_sys->p_video, 0, p_sys->i_page_size );
 551
 552     if( !p_sys->b_hw_accel )
 553     {
 554         /* Try to initialize up to MAX_DIRECTBUFFERS direct buffers */
 555         while( I_OUTPUTPICTURES < MAX_DIRECTBUFFERS )
 556         {
 557             p_pic = NULL;
 558
 559             /* Find an empty picture slot */
 560             for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 561             {
 562                 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 563                 {
 564                     p_pic = p_vout->p_picture + i_index;
 565                     break;
 566                 }
 567             }
 568
 569             /* Allocate the picture */
 570             if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 571             {
 572                 break;
 573             }
 574
 575             p_pic->i_status = DESTROYED_PICTURE;
 576             p_pic->i_type   = DIRECT_PICTURE;
 577
 578             PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 579
 580             I_OUTPUTPICTURES++;
 581         }
 582     }
 583     else
 584     {
 585         /* Try to initialize 1 direct buffer */
 586         p_pic = NULL;
 587
 588         /* Find an empty picture slot */
 589         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 590         {
 591             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 592             {
 593                 p_pic = p_vout->p_picture + i_index;
 594                 break;
 595             }
 596         }
 597
 598         /* Allocate the picture */
 599         if( p_pic == NULL )
 600         {
 601             return VLC_EGENERIC;
 602         }
 603
 604         /* We know the chroma, allocate a buffer which will be used
 605         * directly by the decoder */
 606         p_pic->p->p_pixels = p_vout->p_sys->p_video;
 607         p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 608         p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 609         p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 610
 611         if( p_vout->p_sys->var_info.xres_virtual )
 612         {
 613             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 614                                 * p_vout->p_sys->i_bytes_per_pixel;
 615         }
 616         else
 617         {
 618             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 619                                 * p_vout->p_sys->i_bytes_per_pixel;
 620         }
 621
 622         p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 623                                     * p_vout->p_sys->i_bytes_per_pixel;
 624         p_pic->i_planes = 1;
 625         p_pic->i_status = DESTROYED_PICTURE;
 626         p_pic->i_type   = DIRECT_PICTURE;
 627
 628         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 629
 630         I_OUTPUTPICTURES++;
 631     }
 632
 633     return VLC_SUCCESS;
 634 }
 635
 636 /*****************************************************************************
 637  * End: terminate framebuffer video thread output method
 638  *****************************************************************************/
 639 static void End( vout_thread_t *p_vout )
 640 {
 641     if( !p_vout->p_sys->b_hw_accel )
 642     {
 643         int i_index;
 644
 645         /* Free the direct buffers we allocated */
 646         for( i_index = I_OUTPUTPICTURES ; i_index ; )
 647         {
 648             i_index--;
 649             FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
 650         }
 651
 652     }
 653     /* Clear the screen */
 654     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 655 }
 656
 657 /*****************************************************************************
 658  * Control: control facility for the vout
 659  *****************************************************************************/
 660 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 661 {
 662     switch( i_query )
 663     {
 664        default:
 665             return vout_vaControlDefault( p_vout, i_query, args );
 666     }
 667 }
 668
 669 /*****************************************************************************
 670  * Manage: handle FB events
 671  *****************************************************************************
 672  * This function should be called regularly by video output thread. It manages
 673  * console events. It returns a non null value on error.
 674  *****************************************************************************/
 675 static int Manage( vout_thread_t *p_vout )
 676 {
 677 #if 0
 678     uint8_t buf;
 679
 680     if ( read(0, &buf, 1) == 1)
 681     {
 682         switch( buf )
 683         {
 684         case 'q':
 685             libvlc_Quit( p_vout->p_libvlc );
 686             break;
 687
 688         default:
 689             break;
 690         }
 691     }
 692 #endif
 693
 694     /*
 695      * Size change
 696      */
 697     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 698     {
 699         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 700         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 701
 702         /* Destroy XImages to change their size */
 703         End( p_vout );
 704
 705         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 706         if( Init( p_vout ) )
 707         {
 708             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 709             return VLC_EGENERIC;
 710         }
 711
 712         /* Clear screen */
 713         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 714
 715 #if 0
 716         /* Tell the video output thread that it will need to rebuild YUV
 717          * tables. This is needed since conversion buffer size may have changed */
 718         p_vout->i_changes |= VOUT_YUV_CHANGE;
 719 #endif
 720     }
 721
 722     return VLC_SUCCESS;
 723 }
 724
 725 /*****************************************************************************
 726  * Display: displays previously rendered output
 727  *****************************************************************************
 728  * This function send the currently rendered image to FB image, waits until
 729  * it is displayed and switch the two rendering buffers, preparing next frame.
 730  *****************************************************************************/
 731 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 732 {
 733 static int panned=0;
 734     /* swap the two Y offsets if the drivers supports panning */
 735     if( p_vout->p_sys->b_pan )
 736     {
 737         p_vout->p_sys->var_info.yoffset = 0;
 738         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 739
 740         /* the X offset should be 0, but who knows ...
 741          * some other app might have played with the framebuffer */
 742         p_vout->p_sys->var_info.xoffset = 0;
 743
 744         if( panned < 0 )
 745         {
 746             ioctl( p_vout->p_sys->i_fd,
 747                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 748             panned++;
 749         }
 750     }
 751
 752     if( !p_vout->p_sys->b_hw_accel )
 753     {
 754         vlc_memcpy( p_vout->p_sys->p_video, p_pic->p->p_pixels,
 755                     p_vout->p_sys->i_page_size );
 756     }
 757 }
 758
 759 #if 0
 760 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 761                                                uint16_t *blue, uint16_t *transp )
 762 {
 763     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 764
 765     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 766 }
 767 #endif
 768
 769 /* following functions are local */
 770
 771 /*****************************************************************************
 772  * OpenDisplay: initialize framebuffer
 773  *****************************************************************************/
 774 static int OpenDisplay( vout_thread_t *p_vout )
 775 {
 776     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 777     char *psz_device;                             /* framebuffer device path */
 778     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 779
 780     /* Open framebuffer device */
 781     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 782     {
 783         msg_Err( p_vout, "don't know which fb device to open" );
 784         return VLC_EGENERIC;
 785     }
 786
 787     p_sys->i_fd = open( psz_device, O_RDWR);
 788     if( p_sys->i_fd == -1 )
 789     {
 790         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 791         free( psz_device );
 792         return VLC_EGENERIC;
 793     }
 794     free( psz_device );
 795     psz_device = NULL;
 796
 797     /* Get framebuffer device information */
 798     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 799     {
 800         msg_Err( p_vout, "cannot get fb info (%m)" );
 801         close( p_sys->i_fd );
 802         return VLC_EGENERIC;
 803     }
 804
 805     memcpy( &p_sys->old_info, &p_sys->var_info,
 806             sizeof( struct fb_var_screeninfo ) );
 807
 808     /* Get some info on the framebuffer itself */
 809     if( !p_sys->b_auto )
 810     {
 811         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 812         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 813         p_vout->fmt_out.i_width = p_sys->i_width;
 814         p_vout->fmt_out.i_height = p_sys->i_height;
 815     }
 816
 817     /* Set some attributes */
 818     p_sys->var_info.activate = p_sys->b_tty
 819                                ? FB_ACTIVATE_NXTOPEN
 820                                : FB_ACTIVATE_NOW;
 821     p_sys->var_info.xoffset =  0;
 822     p_sys->var_info.yoffset =  0;
 823
 824     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 825     {
 826         msg_Err( p_vout, "cannot set fb info (%m)" );
 827         close( p_sys->i_fd );
 828         return VLC_EGENERIC;
 829     }
 830
 831     /* Get some information again, in the definitive configuration */
 832     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 833          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 834     {
 835         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 836
 837         /* Restore fb config */
 838         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 839
 840         close( p_sys->i_fd );
 841         return VLC_EGENERIC;
 842     }
 843
 844     /* If the fb has limitations on mode change,
 845      * then keep the resolution of the fb */
 846     if( (p_sys->i_height != p_sys->var_info.yres) ||
 847         (p_sys->i_width != p_sys->var_info.xres) )
 848     {
 849         p_sys->b_auto = true;
 850         msg_Warn( p_vout,
 851                   "using framebuffer native resolution instead of requested (%ix%i)",
 852                   p_sys->i_width, p_sys->i_height );
 853     }
 854     p_sys->i_height = p_sys->var_info.yres;
 855     p_sys->i_width  = p_sys->var_info.xres_virtual
 856                                ? p_sys->var_info.xres_virtual
 857                                : p_sys->var_info.xres;
 858
 859     /* FIXME: if the image is full-size, it gets cropped on the left
 860      * because of the xres / xres_virtual slight difference */
 861     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 862              p_sys->var_info.xres, p_sys->var_info.yres,
 863              p_sys->var_info.xres_virtual,
 864              p_sys->var_info.yres_virtual,
 865              p_sys->i_width, p_sys->i_height );
 866
 867     p_sys->p_palette = NULL;
 868     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 869
 870     switch( p_sys->var_info.bits_per_pixel )
 871     {
 872     case 8:
 873         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 874         if( !p_sys->p_palette )
 875         {
 876             /* Restore fb config */
 877             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 878
 879             close( p_sys->i_fd );
 880             return VLC_ENOMEM;
 881         }
 882         p_sys->fb_cmap.start = 0;
 883         p_sys->fb_cmap.len = 256;
 884         p_sys->fb_cmap.red = p_sys->p_palette;
 885         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 886         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 887         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 888
 889         /* Save the colormap */
 890         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 891
 892         p_sys->i_bytes_per_pixel = 1;
 893         break;
 894
 895     case 15:
 896     case 16:
 897         p_sys->i_bytes_per_pixel = 2;
 898         break;
 899
 900     case 24:
 901         p_sys->i_bytes_per_pixel = 3;
 902         break;
 903
 904     case 32:
 905         p_sys->i_bytes_per_pixel = 4;
 906         break;
 907
 908     default:
 909         msg_Err( p_vout, "screen depth %d is not supported",
 910                          p_sys->var_info.bits_per_pixel );
 911
 912         /* Restore fb config */
 913         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 914
 915         close( p_sys->i_fd );
 916         return VLC_EGENERIC;
 917     }
 918
 919     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 920                          p_sys->i_bytes_per_pixel;
 921
 922     /* Map a framebuffer at the beginning */
 923     p_sys->p_video = mmap( 0, p_sys->i_page_size,
 924                               PROT_READ | PROT_WRITE, MAP_SHARED,
 925                               p_sys->i_fd, 0 );
 926
 927     if( p_sys->p_video == ((void*)-1) )
 928     {
 929         msg_Err( p_vout, "cannot map video memory (%m)" );
 930
 931         if( p_sys->var_info.bits_per_pixel == 8 )
 932         {
 933             free( p_sys->p_palette );
 934             p_sys->p_palette = NULL;
 935         }
 936
 937         /* Restore fb config */
 938         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 939
 940         close( p_sys->i_fd );
 941         return VLC_EGENERIC;
 942     }
 943
 944     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 945              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 946              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 947     return VLC_SUCCESS;
 948 }
 949
 950 /*****************************************************************************
 951  * CloseDisplay: terminate FB video thread output method
 952  *****************************************************************************/
 953 static void CloseDisplay( vout_thread_t *p_vout )
 954 {
 955     /* Clear display */
 956     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 957
 958     /* Restore palette */
 959     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 960     {
 961         ioctl( p_vout->p_sys->i_fd,
 962                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 963         free( p_vout->p_sys->p_palette );
 964         p_vout->p_sys->p_palette = NULL;
 965     }
 966
 967     /* Restore fb config */
 968     ioctl( p_vout->p_sys->i_fd,
 969            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 970
 971     /* Close fb */
 972     close( p_vout->p_sys->i_fd );
 973 }
 974
 975 /*****************************************************************************
 976  * SwitchDisplay: VT change signal handler
 977  *****************************************************************************
 978  * This function activates or deactivates the output of the thread. It is
 979  * called by the VT driver, on terminal change.
 980  *****************************************************************************/
 981 static void SwitchDisplay( int i_signal )
 982 {
 983     VLC_UNUSED( i_signal );
 984 #if 0
 985     vout_thread_t *p_vout;
 986
 987     vlc_mutex_lock( &p_vout_bank->lock );
 988
 989     /* XXX: only test the first video output */
 990     if( p_vout_bank->i_count )
 991     {
 992         p_vout = p_vout_bank->pp_vout[0];
 993
 994         switch( i_signal )
 995         {
 996         case SIGUSR1:                                /* vt has been released */
 997             p_vout->b_active = 0;
 998             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 999             break;
1000         case SIGUSR2:                                /* vt has been acquired */
1001             p_vout->b_active = 1;
1002             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
1003             /* handle blanking */
1004             vlc_mutex_lock( &p_vout->change_lock );
1005             p_vout->i_changes |= VOUT_SIZE_CHANGE;
1006             vlc_mutex_unlock( &p_vout->change_lock );
1007             break;
1008         }
1009     }
1010
1011     vlc_mutex_unlock( &p_vout_bank->lock );
1012 #endif
1013 }
1014
1015 /*****************************************************************************
1016  * TextMode and GfxMode : switch tty to text/graphic mode
1017  *****************************************************************************
1018  * These functions toggle the tty mode.
1019  *****************************************************************************/
1020 static void TextMode( int i_tty )
1021 {
1022     /* return to text mode */
1023     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
1024     {
1025         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
1026     }
1027 }
1028
1029 static void GfxMode( int i_tty )
1030 {
1031     /* switch to graphic mode */
1032     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
1033     {
1034         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
1035     }
1036 }