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 #include <errno.h>                                                 /* ENOMEM */
  29 #include <signal.h>                                      /* SIGUSR1, SIGUSR2 */
  30 #include <fcntl.h>                                                 /* open() */
  31 #include <unistd.h>                                               /* close() */
  32
  33 #include <termios.h>                                       /* struct termios */
  34 #include <sys/ioctl.h>
  35 #include <sys/mman.h>                                              /* mmap() */
  36
  37 #include <linux/fb.h>
  38 #include <linux/vt.h>                                                /* VT_* */
  39 #include <linux/kd.h>                                                 /* KD* */
  40
  41 #ifdef HAVE_CONFIG_H
  42 # include "config.h"
  43 #endif
  44
  45 #include <vlc/vlc.h>
  46 #include <vlc_vout.h>
  47
  48 /*****************************************************************************
  49  * Local prototypes
  50  *****************************************************************************/
  51 static int  Create    ( vlc_object_t * );
  52 static void Destroy   ( vlc_object_t * );
  53
  54 static int  Init      ( vout_thread_t * );
  55 static void End       ( vout_thread_t * );
  56 static int  Manage    ( vout_thread_t * );
  57 static void Display   ( vout_thread_t *, picture_t * );
  58 static int  Control   ( vout_thread_t *, int, va_list );
  59
  60 static int  NewPicture     ( vout_thread_t *, picture_t * );
  61 static void FreePicture    ( vout_thread_t *, picture_t * );
  62
  63 static int  OpenDisplay    ( vout_thread_t * );
  64 static void CloseDisplay   ( vout_thread_t * );
  65 static void SwitchDisplay  ( int i_signal );
  66 static void TextMode       ( int i_tty );
  67 static void GfxMode        ( int i_tty );
  68
  69 #define MAX_DIRECTBUFFERS 1
  70
  71 /*****************************************************************************
  72  * Module descriptor
  73  *****************************************************************************/
  74 #define FB_DEV_VAR "fbdev"
  75
  76 #define DEVICE_TEXT N_("Framebuffer device")
  77 #define DEVICE_LONGTEXT N_( \
  78     "Framebuffer device to use for rendering (usually /dev/fb0).")
  79
  80 #define TTY_TEXT N_("Run fb on current tty.")
  81 #define TTY_LONGTEXT N_( \
  82     "Run framebuffer on current TTY device (default enabled). " \
  83     "(disable tty handling with caution)" )
  84
  85 #define CHROMA_TEXT N_("Chroma used.")
  86 #define CHROMA_LONGTEXT N_( \
  87     "Force use of a specific chroma for output. Default is I420." )
  88
  89 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  90 #define ASPECT_RATIO_LONGTEXT N_( \
  91     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  92
  93 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  94 #define FB_MODE_LONGTEXT N_( \
  95     "Select the resolution for the framebuffer. Currently it supports " \
  96     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
  97
  98 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration.")
  99 #define HW_ACCEL_LONGTEXT N_( \
 100     "If your framebuffer supports hardware acceleration or does double buffering " \
 101     "in hardware then you must disable this option. It then does double buffering " \
 102     "in software." )
 103
 104 vlc_module_begin();
 105     set_shortname( "Framebuffer" );
 106     set_category( CAT_VIDEO );
 107     set_subcategory( SUBCAT_VIDEO_VOUT );
 108     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
 109               VLC_FALSE );
 110     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, VLC_TRUE );
 111     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 112                 VLC_TRUE );
 113     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
 114                 ASPECT_RATIO_LONGTEXT, VLC_TRUE );
 115     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
 116                  VLC_TRUE );
 117     add_bool( "fb-hw-accel", VLC_TRUE, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
 118               VLC_TRUE );
 119     set_description( _("GNU/Linux console framebuffer video output") );
 120     set_capability( "video output", 30 );
 121     set_callbacks( Create, Destroy );
 122 vlc_module_end();
 123
 124 /*****************************************************************************
 125  * vout_sys_t: video output framebuffer method descriptor
 126  *****************************************************************************
 127  * This structure is part of the video output thread descriptor.
 128  * It describes the FB specific properties of an output thread.
 129  *****************************************************************************/
 130 struct vout_sys_t
 131 {
 132     /* System information */
 133     int                 i_tty;                          /* tty device handle */
 134     vlc_bool_t          b_tty;
 135     struct termios      old_termios;
 136
 137     /* Original configuration information */
 138     struct sigaction            sig_usr1;           /* USR1 previous handler */
 139     struct sigaction            sig_usr2;           /* USR2 previous handler */
 140     struct vt_mode              vt_mode;                 /* previous VT mode */
 141
 142     /* Framebuffer information */
 143     int                         i_fd;                       /* device handle */
 144     struct fb_var_screeninfo    old_info;       /* original mode information */
 145     struct fb_var_screeninfo    var_info;        /* current mode information */
 146     vlc_bool_t                  b_pan;     /* does device supports panning ? */
 147     struct fb_cmap              fb_cmap;                /* original colormap */
 148     uint16_t                    *p_palette;              /* original palette */
 149     vlc_bool_t                  b_hw_accel;          /* has hardware support */
 150
 151     /* Video information */
 152     uint32_t i_width;
 153     uint32_t i_height;
 154     int i_aspect;
 155     int i_bytes_per_pixel;
 156     vlc_bool_t   b_auto;       /* Automatically adjust video size to fb size */
 157     vlc_fourcc_t i_chroma;
 158
 159     /* Video memory */
 160     byte_t *    p_video;                                      /* base adress */
 161     size_t      i_page_size;                                    /* page size */
 162 };
 163
 164 struct picture_sys_t
 165 {
 166     byte_t *    p_data;                                       /* base adress */
 167 };
 168
 169 /*****************************************************************************
 170  * Create: allocates FB video thread output method
 171  *****************************************************************************
 172  * This function allocates and initializes a FB vout method.
 173  *****************************************************************************/
 174 static int Create( vlc_object_t *p_this )
 175 {
 176     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 177     vout_sys_t    *p_sys;
 178     char          *psz_chroma;
 179     char          *psz_aspect;
 180     int           i_mode;
 181     struct sigaction    sig_tty;                 /* sigaction for tty change */
 182     struct vt_mode      vt_mode;                          /* vt current mode */
 183     struct termios      new_termios;
 184
 185     /* Allocate instance and initialize some members */
 186     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 187     if( p_vout->p_sys == NULL )
 188     {
 189         msg_Err( p_vout, "out of memory" );
 190         return VLC_ENOMEM;
 191     };
 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 = p_sys->b_tty = 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 = VLC_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 = VLC_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     free( p_pic->p_sys->p_data );
 471     free( p_pic->p_sys );
 472     p_pic->p_sys = NULL;
 473 }
 474
 475 /*****************************************************************************
 476  * Init: initialize framebuffer video thread output method
 477  *****************************************************************************/
 478 static int Init( vout_thread_t *p_vout )
 479 {
 480     vout_sys_t *p_sys = p_vout->p_sys;
 481     int i_index;
 482     picture_t *p_pic = NULL;
 483
 484     I_OUTPUTPICTURES = 0;
 485
 486     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     if( !p_sys->b_auto )
 525     {
 526         p_vout->render.i_width = p_sys->i_width;
 527         p_vout->render.i_height = p_sys->i_height;
 528     }
 529     p_vout->output.i_width  = p_sys->i_width;
 530     p_vout->output.i_height = p_sys->i_height;
 531
 532     /* Assume we have square pixels */
 533     if( p_sys->i_aspect < 0 )
 534     {
 535         p_vout->output.i_aspect = ( p_sys->i_width
 536                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 537     }
 538     else p_vout->output.i_aspect = p_sys->i_aspect;
 539
 540     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 541     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 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     switch( i_query )
 657     {
 658        default:
 659             return vout_vaControlDefault( p_vout, i_query, args );
 660     }
 661 }
 662
 663 /*****************************************************************************
 664  * Manage: handle FB events
 665  *****************************************************************************
 666  * This function should be called regularly by video output thread. It manages
 667  * console events. It returns a non null value on error.
 668  *****************************************************************************/
 669 static int Manage( vout_thread_t *p_vout )
 670 {
 671 #if 0
 672     uint8_t buf;
 673
 674     if ( read(0, &buf, 1) == 1)
 675     {
 676         switch( buf )
 677         {
 678         case 'q':
 679             vlc_object_kill( p_vout->p_libvlc );
 680             break;
 681
 682         default:
 683             break;
 684         }
 685     }
 686 #endif
 687
 688     /*
 689      * Size change
 690      */
 691     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 692     {
 693         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 694         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 695
 696         /* Destroy XImages to change their size */
 697         End( p_vout );
 698
 699         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 700         if( Init( p_vout ) )
 701         {
 702             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 703             return VLC_EGENERIC;
 704         }
 705
 706         /* Clear screen */
 707         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 708
 709 #if 0
 710         /* Tell the video output thread that it will need to rebuild YUV
 711          * tables. This is needed since conversion buffer size may have changed */
 712         p_vout->i_changes |= VOUT_YUV_CHANGE;
 713 #endif
 714     }
 715
 716     return VLC_SUCCESS;
 717 }
 718
 719 /*****************************************************************************
 720  * Display: displays previously rendered output
 721  *****************************************************************************
 722  * This function send the currently rendered image to FB image, waits until
 723  * it is displayed and switch the two rendering buffers, preparing next frame.
 724  *****************************************************************************/
 725 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 726 {
 727 static int panned=0;
 728     /* swap the two Y offsets if the drivers supports panning */
 729     if( p_vout->p_sys->b_pan )
 730     {
 731         p_vout->p_sys->var_info.yoffset = 0;
 732         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 733
 734         /* the X offset should be 0, but who knows ...
 735          * some other app might have played with the framebuffer */
 736         p_vout->p_sys->var_info.xoffset = 0;
 737
 738         if( panned < 0 )
 739         {
 740             ioctl( p_vout->p_sys->i_fd,
 741                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 742             panned++;
 743         }
 744     }
 745
 746     if( !p_vout->p_sys->b_hw_accel )
 747     {
 748         p_vout->p_libvlc->pf_memcpy( p_vout->p_sys->p_video, p_pic->p->p_pixels,
 749                                      p_vout->p_sys->i_page_size );
 750     }
 751 }
 752
 753 #if 0
 754 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 755                                                uint16_t *blue, uint16_t *transp )
 756 {
 757     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 758
 759     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 760 }
 761 #endif
 762
 763 /* following functions are local */
 764
 765 /*****************************************************************************
 766  * OpenDisplay: initialize framebuffer
 767  *****************************************************************************/
 768 static int OpenDisplay( vout_thread_t *p_vout )
 769 {
 770     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 771     char *psz_device;                             /* framebuffer device path */
 772     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 773
 774     /* Open framebuffer device */
 775     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 776     {
 777         msg_Err( p_vout, "don't know which fb device to open" );
 778         return VLC_EGENERIC;
 779     }
 780
 781     p_sys->i_fd = open( psz_device, O_RDWR);
 782     if( p_sys->i_fd == -1 )
 783     {
 784         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 785         free( psz_device );
 786         return VLC_EGENERIC;
 787     }
 788     free( psz_device );
 789     psz_device = NULL;
 790
 791     /* Get framebuffer device information */
 792     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 793     {
 794         msg_Err( p_vout, "cannot get fb info (%m)" );
 795         close( p_sys->i_fd );
 796         return VLC_EGENERIC;
 797     }
 798
 799     memcpy( &p_sys->old_info, &p_sys->var_info,
 800             sizeof( struct fb_var_screeninfo ) );
 801
 802     /* Get some info on the framebuffer itself */
 803     if( !p_sys->b_auto )
 804     {
 805         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 806         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 807         p_vout->fmt_out.i_width = p_sys->i_width;
 808         p_vout->fmt_out.i_height = p_sys->i_height;
 809     }
 810
 811     /* Set some attributes */
 812     p_sys->var_info.activate = p_sys->b_tty
 813                                ? FB_ACTIVATE_NXTOPEN
 814                                : FB_ACTIVATE_NOW;
 815     p_sys->var_info.xoffset =  0;
 816     p_sys->var_info.yoffset =  0;
 817
 818     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 819     {
 820         msg_Err( p_vout, "cannot set fb info (%m)" );
 821         close( p_sys->i_fd );
 822         return VLC_EGENERIC;
 823     }
 824
 825     /* Get some information again, in the definitive configuration */
 826     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 827          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 828     {
 829         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 830
 831         /* Restore fb config */
 832         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 833
 834         close( p_sys->i_fd );
 835         return VLC_EGENERIC;
 836     }
 837
 838     /* If the fb has limitations on mode change,
 839      * then keep the resolution of the fb */
 840     if( (p_sys->i_height != p_sys->var_info.yres) ||
 841         (p_sys->i_width != p_sys->var_info.xres) )
 842     {
 843         p_sys->b_auto = VLC_TRUE;
 844         msg_Warn( p_vout,
 845                   "using framebuffer native resolution instead of requested (%ix%i)",
 846                   p_sys->i_width, p_sys->i_height );
 847     }
 848     p_sys->i_height = p_sys->var_info.yres;
 849     p_sys->i_width  = p_sys->var_info.xres_virtual
 850                                ? p_sys->var_info.xres_virtual
 851                                : p_sys->var_info.xres;
 852
 853     /* FIXME: if the image is full-size, it gets cropped on the left
 854      * because of the xres / xres_virtual slight difference */
 855     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 856              p_sys->var_info.xres, p_sys->var_info.yres,
 857              p_sys->var_info.xres_virtual,
 858              p_sys->var_info.yres_virtual,
 859              p_sys->i_width, p_sys->i_height );
 860
 861     p_sys->p_palette = NULL;
 862     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 863
 864     switch( p_sys->var_info.bits_per_pixel )
 865     {
 866     case 8:
 867         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 868         if( !p_sys->p_palette )
 869         {
 870             msg_Err( p_vout, "out of memory" );
 871
 872             /* Restore fb config */
 873             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 874
 875             close( p_sys->i_fd );
 876             return VLC_ENOMEM;
 877         }
 878         p_sys->fb_cmap.start = 0;
 879         p_sys->fb_cmap.len = 256;
 880         p_sys->fb_cmap.red = p_sys->p_palette;
 881         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 882         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 883         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 884
 885         /* Save the colormap */
 886         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 887
 888         p_sys->i_bytes_per_pixel = 1;
 889         break;
 890
 891     case 15:
 892     case 16:
 893         p_sys->i_bytes_per_pixel = 2;
 894         break;
 895
 896     case 24:
 897         p_sys->i_bytes_per_pixel = 3;
 898         break;
 899
 900     case 32:
 901         p_sys->i_bytes_per_pixel = 4;
 902         break;
 903
 904     default:
 905         msg_Err( p_vout, "screen depth %d is not supported",
 906                          p_sys->var_info.bits_per_pixel );
 907
 908         /* Restore fb config */
 909         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 910
 911         close( p_sys->i_fd );
 912         return VLC_EGENERIC;
 913     }
 914
 915     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 916                          p_sys->i_bytes_per_pixel;
 917
 918     /* Map a framebuffer at the beginning */
 919     p_sys->p_video = mmap( 0, p_sys->i_page_size,
 920                               PROT_READ | PROT_WRITE, MAP_SHARED,
 921                               p_sys->i_fd, 0 );
 922
 923     if( p_sys->p_video == ((void*)-1) )
 924     {
 925         msg_Err( p_vout, "cannot map video memory (%m)" );
 926
 927         if( p_sys->var_info.bits_per_pixel == 8 )
 928         {
 929             free( p_sys->p_palette );
 930             p_sys->p_palette = NULL;
 931         }
 932
 933         /* Restore fb config */
 934         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 935
 936         close( p_sys->i_fd );
 937         return VLC_EGENERIC;
 938     }
 939
 940     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 941              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 942              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 943     return VLC_SUCCESS;
 944 }
 945
 946 /*****************************************************************************
 947  * CloseDisplay: terminate FB video thread output method
 948  *****************************************************************************/
 949 static void CloseDisplay( vout_thread_t *p_vout )
 950 {
 951     /* Clear display */
 952     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 953
 954     /* Restore palette */
 955     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 956     {
 957         ioctl( p_vout->p_sys->i_fd,
 958                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 959         free( p_vout->p_sys->p_palette );
 960         p_vout->p_sys->p_palette = NULL;
 961     }
 962
 963     /* Restore fb config */
 964     ioctl( p_vout->p_sys->i_fd,
 965            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 966
 967     /* Close fb */
 968     close( p_vout->p_sys->i_fd );
 969 }
 970
 971 /*****************************************************************************
 972  * SwitchDisplay: VT change signal handler
 973  *****************************************************************************
 974  * This function activates or deactivates the output of the thread. It is
 975  * called by the VT driver, on terminal change.
 976  *****************************************************************************/
 977 static void SwitchDisplay( int i_signal )
 978 {
 979 #if 0
 980     vout_thread_t *p_vout;
 981
 982     vlc_mutex_lock( &p_vout_bank->lock );
 983
 984     /* XXX: only test the first video output */
 985     if( p_vout_bank->i_count )
 986     {
 987         p_vout = p_vout_bank->pp_vout[0];
 988
 989         switch( i_signal )
 990         {
 991         case SIGUSR1:                                /* vt has been released */
 992             p_vout->b_active = 0;
 993             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 994             break;
 995         case SIGUSR2:                                /* vt has been acquired */
 996             p_vout->b_active = 1;
 997             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 998             /* handle blanking */
 999             vlc_mutex_lock( &p_vout->change_lock );
1000             p_vout->i_changes |= VOUT_SIZE_CHANGE;
1001             vlc_mutex_unlock( &p_vout->change_lock );
1002             break;
1003         }
1004     }
1005
1006     vlc_mutex_unlock( &p_vout_bank->lock );
1007 #endif
1008 }
1009
1010 /*****************************************************************************
1011  * TextMode and GfxMode : switch tty to text/graphic mode
1012  *****************************************************************************
1013  * These functions toggle the tty mode.
1014  *****************************************************************************/
1015 static void TextMode( int i_tty )
1016 {
1017     /* return to text mode */
1018     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
1019     {
1020         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
1021     }
1022 }
1023
1024 static void GfxMode( int i_tty )
1025 {
1026     /* switch to graphic mode */
1027     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
1028     {
1029         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
1030     }
1031 }