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  * Module descriptor
  53  *****************************************************************************/
  54 #define FB_DEV_VAR "fbdev"
  55
  56 #define DEVICE_TEXT N_("Framebuffer device")
  57 #define DEVICE_LONGTEXT N_( \
  58     "Framebuffer device to use for rendering (usually /dev/fb0).")
  59
  60 #define TTY_TEXT N_("Run fb on current tty.")
  61 #define TTY_LONGTEXT N_( \
  62     "Run framebuffer on current TTY device (default enabled). " \
  63     "(disable tty handling with caution)" )
  64
  65 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  66 #define FB_MODE_LONGTEXT N_( \
  67     "Select the resolution for the framebuffer. Currently it supports " \
  68     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
  69
  70 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration.")
  71 #define HW_ACCEL_LONGTEXT N_( \
  72     "If your framebuffer supports hardware acceleration or does double buffering " \
  73     "in hardware then you must disable this option. It then does double buffering " \
  74     "in software." )
  75
  76 static int  Open ( vlc_object_t * );
  77 static void Close( vlc_object_t * );
  78
  79 vlc_module_begin ()
  80     set_shortname( "Framebuffer" )
  81     set_category( CAT_VIDEO )
  82     set_subcategory( SUBCAT_VIDEO_VOUT )
  83     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
  84               false )
  85     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, true )
  86     add_obsolete_string( "fb-chroma" );
  87     add_obsolete_string( "fb-aspect-ratio" );
  88     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
  89                  true )
  90     add_bool( "fb-hw-accel", true, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
  91               true )
  92     set_description( N_("GNU/Linux framebuffer video output") )
  93     set_capability( "video output", 30 )
  94     set_callbacks( Open, Close )
  95 vlc_module_end ()
  96
  97
  98 /*****************************************************************************
  99  * Local prototypes
 100  *****************************************************************************/
 101 static int  Init      ( vout_thread_t * );
 102 static void End       ( vout_thread_t * );
 103 static int  Manage    ( vout_thread_t * );
 104 static void Display   ( vout_thread_t *, picture_t * );
 105 static int  Control   ( vout_thread_t *, int, va_list );
 106
 107 static int  NewPicture     ( vout_thread_t *, picture_t * );
 108 static void FreePicture    ( vout_thread_t *, picture_t * );
 109
 110 static int  OpenDisplay    ( vout_thread_t * );
 111 static void CloseDisplay   ( vout_thread_t * );
 112 static void SwitchDisplay  ( int i_signal );
 113 static void TextMode       ( int i_tty );
 114 static void GfxMode        ( int i_tty );
 115
 116 static int  TtyInit( vout_thread_t * );
 117 static void TtyExit( vout_thread_t * );
 118
 119 #define MAX_DIRECTBUFFERS 1
 120
 121 /*****************************************************************************
 122  * vout_sys_t: video output framebuffer method descriptor
 123  *****************************************************************************
 124  * This structure is part of the video output thread descriptor.
 125  * It describes the FB specific properties of an output thread.
 126  *****************************************************************************/
 127 struct vout_sys_t
 128 {
 129     /* System information */
 130     int                 i_tty;                          /* tty device handle */
 131     bool                b_tty;
 132     struct termios      old_termios;
 133
 134     /* Original configuration information */
 135     struct sigaction            sig_usr1;           /* USR1 previous handler */
 136     struct sigaction            sig_usr2;           /* USR2 previous handler */
 137     struct vt_mode              vt_mode;                 /* previous VT mode */
 138
 139     /* Framebuffer information */
 140     int                         i_fd;                       /* device handle */
 141     struct fb_var_screeninfo    old_info;       /* original mode information */
 142     struct fb_var_screeninfo    var_info;        /* current mode information */
 143     bool                        b_pan;     /* does device supports panning ? */
 144     struct fb_cmap              fb_cmap;                /* original colormap */
 145     uint16_t                    *p_palette;              /* original palette */
 146     bool                        b_hw_accel;          /* has hardware support */
 147
 148     /* Video information */
 149     uint32_t i_width;
 150     uint32_t i_height;
 151     int      i_bytes_per_pixel;
 152     bool     b_auto;       /* Automatically adjust video size to fb size */
 153
 154     /* Video memory */
 155     uint8_t    *p_video;                                      /* base adress */
 156     size_t      i_page_size;                                    /* page size */
 157 };
 158
 159 struct picture_sys_t
 160 {
 161     uint8_t *    p_data;                                      /* base adress */
 162 };
 163
 164 /**
 165  * This function allocates and initializes a FB vout method.
 166  */
 167 static int Open( vlc_object_t *p_this )
 168 {
 169     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 170     vout_sys_t    *p_sys;
 171
 172     /* Allocate instance and initialize some members */
 173     p_vout->p_sys = p_sys = calloc( 1, sizeof( *p_sys ) );
 174     if( !p_sys )
 175         return VLC_ENOMEM;
 176
 177     p_sys->p_video = MAP_FAILED;
 178
 179     /* Does the framebuffer uses hw acceleration? */
 180     p_sys->b_hw_accel = var_CreateGetBool( p_vout, "fb-hw-accel" );
 181
 182     /* Set tty and fb devices */
 183     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 184     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 185 #ifndef WIN32
 186 #if defined(HAVE_ISATTY)
 187     /* Check that stdin is a TTY */
 188     if( p_sys->b_tty && !isatty( 0 ) )
 189     {
 190         msg_Warn( p_vout, "fd 0 is not a TTY" );
 191         free( p_sys );
 192         return VLC_EGENERIC;
 193     }
 194     else
 195     {
 196         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 197                           "there is no way to return to the tty." );
 198     }
 199 #endif
 200 #endif
 201
 202     p_sys->b_auto = false;
 203     const int i_mode = var_CreateGetInteger( p_vout, "fb-mode" );
 204     switch( i_mode )
 205     {
 206     case 0: /* QCIF */
 207         p_sys->i_width  = 176;
 208         p_sys->i_height = 144;
 209         break;
 210     case 1: /* CIF */
 211         p_sys->i_width  = 352;
 212         p_sys->i_height = 288;
 213         break;
 214     case 2: /* NTSC */
 215         p_sys->i_width  = 640;
 216         p_sys->i_height = 480;
 217         break;
 218     case 3: /* PAL */
 219         p_sys->i_width  = 704;
 220         p_sys->i_height = 576;
 221         break;
 222     case 4:
 223     default:
 224         p_sys->b_auto = true;
 225         break;
 226     }
 227
 228     /* tty handling */
 229     if( p_sys->b_tty && TtyInit( p_vout ) )
 230     {
 231         free( p_sys );
 232         return VLC_EGENERIC;
 233     }
 234
 235     if( OpenDisplay( p_vout ) )
 236     {
 237         Close( VLC_OBJECT(p_vout) );
 238         return VLC_EGENERIC;
 239     }
 240
 241     /* */
 242     p_vout->pf_init = Init;
 243     p_vout->pf_end = End;
 244     p_vout->pf_manage = Manage;
 245     p_vout->pf_render = NULL;
 246     p_vout->pf_display = Display;
 247     p_vout->pf_control = Control;
 248     return VLC_SUCCESS;
 249 }
 250
 251
 252 /**
 253  * Terminate an output method created by Open
 254  */
 255 static void Close( vlc_object_t *p_this )
 256 {
 257     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 258
 259     CloseDisplay( p_vout );
 260
 261     if( p_vout->p_sys->b_tty )
 262         TtyExit( p_vout );
 263
 264     /* Destroy structure */
 265     free( p_vout->p_sys );
 266 }
 267
 268 static int TtyInit( vout_thread_t *p_vout )
 269 {
 270     vout_sys_t *p_sys = p_vout->p_sys;
 271
 272     struct termios new_termios;
 273
 274     GfxMode( p_sys->i_tty );
 275
 276     /* Set keyboard settings */
 277     if( tcgetattr(0, &p_sys->old_termios) == -1 )
 278     {
 279         msg_Err( p_vout, "tcgetattr failed" );
 280     }
 281
 282     if( tcgetattr(0, &new_termios) == -1 )
 283     {
 284         msg_Err( p_vout, "tcgetattr failed" );
 285     }
 286
 287     /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 288     new_termios.c_lflag |= (ECHO | ECHOCTL); */
 289     new_termios.c_lflag &= ~ (ICANON);
 290     new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 291     new_termios.c_iflag = 0;
 292     new_termios.c_cc[VMIN] = 1;
 293     new_termios.c_cc[VTIME] = 0;
 294
 295     if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 296     {
 297         msg_Err( p_vout, "tcsetattr failed" );
 298     }
 299
 300     ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 301
 302     /* Set-up tty signal handler to be aware of tty changes */
 303     struct sigaction sig_tty;
 304     memset( &sig_tty, 0, sizeof( sig_tty ) );
 305     sig_tty.sa_handler = SwitchDisplay;
 306     sigemptyset( &sig_tty.sa_mask );
 307     if( sigaction( SIGUSR1, &sig_tty, &p_sys->sig_usr1 ) ||
 308         sigaction( SIGUSR2, &sig_tty, &p_sys->sig_usr2 ) )
 309     {
 310         msg_Err( p_vout, "cannot set signal handler (%m)" );
 311         tcsetattr(0, 0, &p_sys->old_termios);
 312         TextMode( p_sys->i_tty );
 313         return VLC_EGENERIC;
 314     }
 315
 316     /* Set-up tty according to new signal handler */
 317     if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_sys->vt_mode ) )
 318     {
 319         msg_Err( p_vout, "cannot get terminal mode (%m)" );
 320         sigaction( SIGUSR1, &p_sys->sig_usr1, NULL );
 321         sigaction( SIGUSR2, &p_sys->sig_usr2, NULL );
 322         tcsetattr(0, 0, &p_sys->old_termios);
 323         TextMode( p_sys->i_tty );
 324         return VLC_EGENERIC;
 325     }
 326     struct vt_mode vt_mode = p_sys->vt_mode;
 327     vt_mode.mode   = VT_PROCESS;
 328     vt_mode.waitv  = 0;
 329     vt_mode.relsig = SIGUSR1;
 330     vt_mode.acqsig = SIGUSR2;
 331
 332     if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 333     {
 334         msg_Err( p_vout, "cannot set terminal mode (%m)" );
 335         sigaction( SIGUSR1, &p_sys->sig_usr1, NULL );
 336         sigaction( SIGUSR2, &p_sys->sig_usr2, NULL );
 337         tcsetattr(0, 0, &p_sys->old_termios);
 338         TextMode( p_sys->i_tty );
 339         return VLC_EGENERIC;
 340     }
 341     return VLC_SUCCESS;
 342 }
 343 static void TtyExit( vout_thread_t *p_vout )
 344 {
 345     vout_sys_t *p_sys = p_vout->p_sys;
 346
 347     /* Reset the terminal */
 348     ioctl( p_sys->i_tty, VT_SETMODE, &p_sys->vt_mode );
 349
 350     /* Remove signal handlers */
 351     sigaction( SIGUSR1, &p_sys->sig_usr1, NULL );
 352     sigaction( SIGUSR2, &p_sys->sig_usr2, NULL );
 353
 354     /* Reset the keyboard state */
 355     tcsetattr( 0, 0, &p_sys->old_termios );
 356
 357     /* Return to text mode */
 358     TextMode( p_sys->i_tty );
 359 }
 360
 361 /*****************************************************************************
 362  * NewPicture: allocate a picture
 363  *****************************************************************************
 364  * Returns 0 on success, -1 otherwise
 365  *****************************************************************************/
 366 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 367 {
 368     /* We know the chroma, allocate a buffer which will be used
 369      * directly by the decoder */
 370     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 371     if( p_pic->p_sys == NULL )
 372     {
 373         return VLC_ENOMEM;
 374     }
 375
 376     /* Fill in picture_t fields */
 377     if( picture_Setup( p_pic, p_vout->output.i_chroma,
 378                        p_vout->output.i_width, p_vout->output.i_height,
 379                        p_vout->output.i_aspect ) )
 380     {
 381         free( p_pic );
 382         return VLC_EGENERIC;
 383     }
 384
 385     p_pic->p_sys->p_data = malloc( p_vout->p_sys->i_page_size );
 386     if( !p_pic->p_sys->p_data )
 387     {
 388         free( p_pic->p_sys );
 389         p_pic->p_sys = NULL;
 390         return VLC_ENOMEM;
 391     }
 392
 393     p_pic->p->p_pixels = (uint8_t*) p_pic->p_sys->p_data;
 394
 395     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 396     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 397     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 398
 399     if( p_vout->p_sys->var_info.xres_virtual )
 400     {
 401         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 402                              * p_vout->p_sys->i_bytes_per_pixel;
 403     }
 404     else
 405     {
 406         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 407                              * p_vout->p_sys->i_bytes_per_pixel;
 408     }
 409
 410     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 411                                  * p_vout->p_sys->i_bytes_per_pixel;
 412     p_pic->i_planes = 1;
 413
 414     return VLC_SUCCESS;
 415 }
 416
 417 /*****************************************************************************
 418  * FreePicture: destroy a picture allocated with NewPicture
 419  *****************************************************************************
 420  * Destroy Image AND associated data.
 421  *****************************************************************************/
 422 static void FreePicture( vout_thread_t *p_vout, picture_t *p_pic )
 423 {
 424     VLC_UNUSED(p_vout);
 425     free( p_pic->p_sys->p_data );
 426     free( p_pic->p_sys );
 427     p_pic->p_sys = NULL;
 428 }
 429
 430 /*****************************************************************************
 431  * Init: initialize framebuffer video thread output method
 432  *****************************************************************************/
 433 static int Init( vout_thread_t *p_vout )
 434 {
 435     vout_sys_t *p_sys = p_vout->p_sys;
 436     int i_index;
 437     picture_t *p_pic = NULL;
 438
 439     I_OUTPUTPICTURES = 0;
 440
 441     p_vout->output.i_width  = p_vout->render.i_width;
 442     p_vout->output.i_height = p_vout->render.i_height;
 443     p_vout->output.i_aspect = p_vout->render.i_aspect;
 444
 445     p_vout->fmt_out = p_vout->fmt_in;
 446
 447     /* Initialize the output structure: RGB with square pixels, whatever
 448      * the input format is, since it's the only format we know */
 449     switch( p_sys->var_info.bits_per_pixel )
 450     {
 451     case 8: /* FIXME: set the palette */
 452         p_vout->output.i_chroma = VLC_CODEC_RGB8; break;
 453     case 15:
 454         p_vout->output.i_chroma = VLC_CODEC_RGB15; break;
 455     case 16:
 456         p_vout->output.i_chroma = VLC_CODEC_RGB16; break;
 457     case 24:
 458         p_vout->output.i_chroma = VLC_CODEC_RGB24; break;
 459     case 32:
 460         p_vout->output.i_chroma = VLC_CODEC_RGB32; break;
 461     default:
 462         msg_Err( p_vout, "unknown screen depth %i",
 463                  p_vout->p_sys->var_info.bits_per_pixel );
 464         return VLC_EGENERIC;
 465     }
 466
 467     if( p_sys->var_info.bits_per_pixel != 8 )
 468     {
 469         p_vout->output.i_rmask = ( (1 << p_sys->var_info.red.length) - 1 )
 470                              << p_sys->var_info.red.offset;
 471         p_vout->output.i_gmask = ( (1 << p_sys->var_info.green.length) - 1 )
 472                              << p_sys->var_info.green.offset;
 473         p_vout->output.i_bmask = ( (1 << p_sys->var_info.blue.length) - 1 )
 474                              << p_sys->var_info.blue.offset;
 475     }
 476     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 477
 478     p_vout->output.i_width =
 479     p_vout->fmt_out.i_width =
 480     p_vout->fmt_out.i_visible_width = p_sys->i_width;
 481     p_vout->output.i_height =
 482     p_vout->fmt_out.i_height =
 483     p_vout->fmt_out.i_visible_height = p_sys->i_height;
 484
 485     /* Assume we have square pixels */
 486     p_vout->output.i_aspect = ( p_sys->i_width
 487                               * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 488
 489     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 490     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 491     p_vout->fmt_out.i_x_offset= p_vout->fmt_out.i_y_offset = 0;
 492
 493     /* Clear the screen */
 494     memset( p_sys->p_video, 0, p_sys->i_page_size );
 495
 496     if( !p_sys->b_hw_accel )
 497     {
 498         /* Try to initialize up to MAX_DIRECTBUFFERS direct buffers */
 499         while( I_OUTPUTPICTURES < MAX_DIRECTBUFFERS )
 500         {
 501             p_pic = NULL;
 502
 503             /* Find an empty picture slot */
 504             for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 505             {
 506                 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 507                 {
 508                     p_pic = p_vout->p_picture + i_index;
 509                     break;
 510                 }
 511             }
 512
 513             /* Allocate the picture */
 514             if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 515             {
 516                 break;
 517             }
 518
 519             p_pic->i_status = DESTROYED_PICTURE;
 520             p_pic->i_type   = DIRECT_PICTURE;
 521
 522             PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 523
 524             I_OUTPUTPICTURES++;
 525         }
 526     }
 527     else
 528     {
 529         /* Try to initialize 1 direct buffer */
 530         p_pic = NULL;
 531
 532         /* Find an empty picture slot */
 533         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 534         {
 535             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 536             {
 537                 p_pic = p_vout->p_picture + i_index;
 538                 break;
 539             }
 540         }
 541
 542         /* Allocate the picture */
 543         if( p_pic == NULL )
 544         {
 545             return VLC_EGENERIC;
 546         }
 547
 548         /* We know the chroma, allocate a buffer which will be used
 549         * directly by the decoder */
 550         p_pic->p->p_pixels = p_vout->p_sys->p_video;
 551         p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 552         p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 553         p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 554
 555         if( p_vout->p_sys->var_info.xres_virtual )
 556         {
 557             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 558                                 * p_vout->p_sys->i_bytes_per_pixel;
 559         }
 560         else
 561         {
 562             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 563                                 * p_vout->p_sys->i_bytes_per_pixel;
 564         }
 565
 566         p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 567                                     * p_vout->p_sys->i_bytes_per_pixel;
 568         p_pic->i_planes = 1;
 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     return VLC_SUCCESS;
 578 }
 579
 580 /*****************************************************************************
 581  * End: terminate framebuffer video thread output method
 582  *****************************************************************************/
 583 static void End( vout_thread_t *p_vout )
 584 {
 585     if( !p_vout->p_sys->b_hw_accel )
 586     {
 587         int i_index;
 588
 589         /* Free the direct buffers we allocated */
 590         for( i_index = I_OUTPUTPICTURES ; i_index ; )
 591         {
 592             i_index--;
 593             FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
 594         }
 595
 596     }
 597     /* Clear the screen */
 598     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 599 }
 600
 601 /*****************************************************************************
 602  * Control: control facility for the vout
 603  *****************************************************************************/
 604 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 605 {
 606     (void) p_vout; (void) i_query; (void) args;
 607     return VLC_EGENERIC;
 608 }
 609
 610 /*****************************************************************************
 611  * Manage: handle FB events
 612  *****************************************************************************
 613  * This function should be called regularly by video output thread. It manages
 614  * console events. It returns a non null value on error.
 615  *****************************************************************************/
 616 static int Manage( vout_thread_t *p_vout )
 617 {
 618 #if 0
 619     uint8_t buf;
 620
 621     if ( read(0, &buf, 1) == 1)
 622     {
 623         switch( buf )
 624         {
 625         case 'q':
 626             libvlc_Quit( p_vout->p_libvlc );
 627             break;
 628
 629         default:
 630             break;
 631         }
 632     }
 633 #endif
 634
 635     /*
 636      * Size change
 637      */
 638     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 639     {
 640         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 641         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 642
 643         /* Destroy XImages to change their size */
 644         End( p_vout );
 645
 646         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 647         if( Init( p_vout ) )
 648         {
 649             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 650             return VLC_EGENERIC;
 651         }
 652
 653         /* Clear screen */
 654         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 655
 656 #if 0
 657         /* Tell the video output thread that it will need to rebuild YUV
 658          * tables. This is needed since conversion buffer size may have changed */
 659         p_vout->i_changes |= VOUT_YUV_CHANGE;
 660 #endif
 661     }
 662
 663     return VLC_SUCCESS;
 664 }
 665
 666 /*****************************************************************************
 667  * Display: displays previously rendered output
 668  *****************************************************************************
 669  * This function send the currently rendered image to FB image, waits until
 670  * it is displayed and switch the two rendering buffers, preparing next frame.
 671  *****************************************************************************/
 672 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 673 {
 674 static int panned=0;
 675     /* swap the two Y offsets if the drivers supports panning */
 676     if( p_vout->p_sys->b_pan )
 677     {
 678         p_vout->p_sys->var_info.yoffset = 0;
 679         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 680
 681         /* the X offset should be 0, but who knows ...
 682          * some other app might have played with the framebuffer */
 683         p_vout->p_sys->var_info.xoffset = 0;
 684
 685         if( panned < 0 )
 686         {
 687             ioctl( p_vout->p_sys->i_fd,
 688                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 689             panned++;
 690         }
 691     }
 692
 693     if( !p_vout->p_sys->b_hw_accel )
 694     {
 695         vlc_memcpy( p_vout->p_sys->p_video, p_pic->p->p_pixels,
 696                     p_vout->p_sys->i_page_size );
 697     }
 698 }
 699
 700 #if 0
 701 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 702                                                uint16_t *blue, uint16_t *transp )
 703 {
 704     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 705
 706     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 707 }
 708 #endif
 709
 710 /* following functions are local */
 711
 712 /*****************************************************************************
 713  * OpenDisplay: initialize framebuffer
 714  *****************************************************************************/
 715 static int OpenDisplay( vout_thread_t *p_vout )
 716 {
 717     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 718     char *psz_device;                             /* framebuffer device path */
 719     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 720
 721     /* Open framebuffer device */
 722     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 723     {
 724         msg_Err( p_vout, "don't know which fb device to open" );
 725         return VLC_EGENERIC;
 726     }
 727
 728     p_sys->i_fd = open( psz_device, O_RDWR);
 729     if( p_sys->i_fd == -1 )
 730     {
 731         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 732         free( psz_device );
 733         return VLC_EGENERIC;
 734     }
 735     free( psz_device );
 736
 737     /* Get framebuffer device information */
 738     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 739     {
 740         msg_Err( p_vout, "cannot get fb info (%m)" );
 741         close( p_sys->i_fd );
 742         return VLC_EGENERIC;
 743     }
 744
 745     memcpy( &p_sys->old_info, &p_sys->var_info,
 746             sizeof( struct fb_var_screeninfo ) );
 747
 748     /* Get some info on the framebuffer itself */
 749     if( !p_sys->b_auto )
 750     {
 751         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 752         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 753         p_vout->fmt_out.i_width = p_sys->i_width;
 754         p_vout->fmt_out.i_height = p_sys->i_height;
 755     }
 756
 757     /* Set some attributes */
 758     p_sys->var_info.activate = p_sys->b_tty
 759                                ? FB_ACTIVATE_NXTOPEN
 760                                : FB_ACTIVATE_NOW;
 761     p_sys->var_info.xoffset =  0;
 762     p_sys->var_info.yoffset =  0;
 763
 764     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 765     {
 766         msg_Err( p_vout, "cannot set fb info (%m)" );
 767         close( p_sys->i_fd );
 768         return VLC_EGENERIC;
 769     }
 770
 771     /* Get some information again, in the definitive configuration */
 772     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 773          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 774     {
 775         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 776
 777         /* Restore fb config */
 778         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 779
 780         close( p_sys->i_fd );
 781         return VLC_EGENERIC;
 782     }
 783
 784     /* If the fb has limitations on mode change,
 785      * then keep the resolution of the fb */
 786     if( (p_sys->i_height != p_sys->var_info.yres) ||
 787         (p_sys->i_width != p_sys->var_info.xres) )
 788     {
 789         p_sys->b_auto = true;
 790         msg_Warn( p_vout,
 791                   "using framebuffer native resolution instead of requested (%ix%i)",
 792                   p_sys->i_width, p_sys->i_height );
 793     }
 794     p_sys->i_height = p_sys->var_info.yres;
 795     p_sys->i_width  = p_sys->var_info.xres_virtual
 796                                ? p_sys->var_info.xres_virtual
 797                                : p_sys->var_info.xres;
 798
 799     /* FIXME: if the image is full-size, it gets cropped on the left
 800      * because of the xres / xres_virtual slight difference */
 801     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 802              p_sys->var_info.xres, p_sys->var_info.yres,
 803              p_sys->var_info.xres_virtual,
 804              p_sys->var_info.yres_virtual,
 805              p_sys->i_width, p_sys->i_height );
 806
 807     p_sys->p_palette = NULL;
 808     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 809
 810     switch( p_sys->var_info.bits_per_pixel )
 811     {
 812     case 8:
 813         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 814         if( !p_sys->p_palette )
 815         {
 816             /* Restore fb config */
 817             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 818
 819             close( p_sys->i_fd );
 820             return VLC_ENOMEM;
 821         }
 822         p_sys->fb_cmap.start = 0;
 823         p_sys->fb_cmap.len = 256;
 824         p_sys->fb_cmap.red = p_sys->p_palette;
 825         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 826         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 827         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 828
 829         /* Save the colormap */
 830         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 831
 832         p_sys->i_bytes_per_pixel = 1;
 833         break;
 834
 835     case 15:
 836     case 16:
 837         p_sys->i_bytes_per_pixel = 2;
 838         break;
 839
 840     case 24:
 841         p_sys->i_bytes_per_pixel = 3;
 842         break;
 843
 844     case 32:
 845         p_sys->i_bytes_per_pixel = 4;
 846         break;
 847
 848     default:
 849         msg_Err( p_vout, "screen depth %d is not supported",
 850                          p_sys->var_info.bits_per_pixel );
 851
 852         /* Restore fb config */
 853         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 854
 855         close( p_sys->i_fd );
 856         return VLC_EGENERIC;
 857     }
 858
 859     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 860                          p_sys->i_bytes_per_pixel;
 861
 862     /* Map a framebuffer at the beginning */
 863     p_sys->p_video = mmap( NULL, p_sys->i_page_size,
 864                               PROT_READ | PROT_WRITE, MAP_SHARED,
 865                               p_sys->i_fd, 0 );
 866
 867     if( p_sys->p_video == MAP_FAILED )
 868     {
 869         msg_Err( p_vout, "cannot map video memory (%m)" );
 870
 871         if( p_sys->var_info.bits_per_pixel == 8 )
 872         {
 873             free( p_sys->p_palette );
 874             p_sys->p_palette = NULL;
 875         }
 876
 877         /* Restore fb config */
 878         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 879
 880         close( p_sys->i_fd );
 881         return VLC_EGENERIC;
 882     }
 883
 884     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 885              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 886              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 887     return VLC_SUCCESS;
 888 }
 889
 890 /*****************************************************************************
 891  * CloseDisplay: terminate FB video thread output method
 892  *****************************************************************************/
 893 static void CloseDisplay( vout_thread_t *p_vout )
 894 {
 895     if( p_vout->p_sys->p_video != MAP_FAILED )
 896     {
 897         /* Clear display */
 898         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 899         munmap( p_vout->p_sys->p_video, p_vout->p_sys->i_page_size );
 900     }
 901
 902     if( p_vout->p_sys->i_fd >= 0 )
 903     {
 904         /* Restore palette */
 905         if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 906         {
 907             ioctl( p_vout->p_sys->i_fd,
 908                    FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 909             free( p_vout->p_sys->p_palette );
 910             p_vout->p_sys->p_palette = NULL;
 911         }
 912
 913         /* Restore fb config */
 914         ioctl( p_vout->p_sys->i_fd,
 915                FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 916
 917         /* Close fb */
 918         close( p_vout->p_sys->i_fd );
 919     }
 920 }
 921
 922 /*****************************************************************************
 923  * SwitchDisplay: VT change signal handler
 924  *****************************************************************************
 925  * This function activates or deactivates the output of the thread. It is
 926  * called by the VT driver, on terminal change.
 927  *****************************************************************************/
 928 static void SwitchDisplay( int i_signal )
 929 {
 930     VLC_UNUSED( i_signal );
 931 #if 0
 932     vout_thread_t *p_vout;
 933
 934     vlc_mutex_lock( &p_vout_bank->lock );
 935
 936     /* XXX: only test the first video output */
 937     if( p_vout_bank->i_count )
 938     {
 939         p_vout = p_vout_bank->pp_vout[0];
 940
 941         switch( i_signal )
 942         {
 943         case SIGUSR1:                                /* vt has been released */
 944             p_vout->b_active = 0;
 945             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
 946             break;
 947         case SIGUSR2:                                /* vt has been acquired */
 948             p_vout->b_active = 1;
 949             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
 950             /* handle blanking */
 951             vlc_mutex_lock( &p_vout->change_lock );
 952             p_vout->i_changes |= VOUT_SIZE_CHANGE;
 953             vlc_mutex_unlock( &p_vout->change_lock );
 954             break;
 955         }
 956     }
 957
 958     vlc_mutex_unlock( &p_vout_bank->lock );
 959 #endif
 960 }
 961
 962 /*****************************************************************************
 963  * TextMode and GfxMode : switch tty to text/graphic mode
 964  *****************************************************************************
 965  * These functions toggle the tty mode.
 966  *****************************************************************************/
 967 static void TextMode( int i_tty )
 968 {
 969     /* return to text mode */
 970     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
 971     {
 972         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
 973     }
 974 }
 975
 976 static void GfxMode( int i_tty )
 977 {
 978     /* switch to graphic mode */
 979     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
 980     {
 981         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
 982     }
 983 }