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_plugin.h>
  47 #include <vlc_vout.h>
  48
  49 /*****************************************************************************
  50  * Local prototypes
  51  *****************************************************************************/
  52 static int  Create    ( vlc_object_t * );
  53 static void Destroy   ( vlc_object_t * );
  54
  55 static int  Init      ( vout_thread_t * );
  56 static void End       ( vout_thread_t * );
  57 static int  Manage    ( vout_thread_t * );
  58 static void Display   ( vout_thread_t *, picture_t * );
  59 static int  Control   ( vout_thread_t *, int, va_list );
  60
  61 static int  NewPicture     ( vout_thread_t *, picture_t * );
  62 static void FreePicture    ( vout_thread_t *, picture_t * );
  63
  64 static int  OpenDisplay    ( vout_thread_t * );
  65 static void CloseDisplay   ( vout_thread_t * );
  66 static void SwitchDisplay  ( int i_signal );
  67 static void TextMode       ( int i_tty );
  68 static void GfxMode        ( int i_tty );
  69
  70 #define MAX_DIRECTBUFFERS 1
  71
  72 /*****************************************************************************
  73  * Module descriptor
  74  *****************************************************************************/
  75 #define FB_DEV_VAR "fbdev"
  76
  77 #define DEVICE_TEXT N_("Framebuffer device")
  78 #define DEVICE_LONGTEXT N_( \
  79     "Framebuffer device to use for rendering (usually /dev/fb0).")
  80
  81 #define TTY_TEXT N_("Run fb on current tty.")
  82 #define TTY_LONGTEXT N_( \
  83     "Run framebuffer on current TTY device (default enabled). " \
  84     "(disable tty handling with caution)" )
  85
  86 #define CHROMA_TEXT N_("Chroma used.")
  87 #define CHROMA_LONGTEXT N_( \
  88     "Force use of a specific chroma for output. Default is I420." )
  89
  90 #define ASPECT_RATIO_TEXT N_("Video aspect ratio")
  91 #define ASPECT_RATIO_LONGTEXT N_( \
  92     "Aspect ratio of the video image (4:3, 16:9). Default is square pixels." )
  93
  94 #define FB_MODE_TEXT N_("Framebuffer resolution to use.")
  95 #define FB_MODE_LONGTEXT N_( \
  96     "Select the resolution for the framebuffer. Currently it supports " \
  97     "the values 0=QCIF 1=CIF 2=NTSC 3=PAL, 4=auto (default 4=auto)" )
  98
  99 #define HW_ACCEL_TEXT N_("Framebuffer uses hw acceleration.")
 100 #define HW_ACCEL_LONGTEXT N_( \
 101     "If your framebuffer supports hardware acceleration or does double buffering " \
 102     "in hardware then you must disable this option. It then does double buffering " \
 103     "in software." )
 104
 105 vlc_module_begin();
 106     set_shortname( "Framebuffer" );
 107     set_category( CAT_VIDEO );
 108     set_subcategory( SUBCAT_VIDEO_VOUT );
 109     add_file( FB_DEV_VAR, "/dev/fb0", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
 110               false );
 111     add_bool( "fb-tty", 1, NULL, TTY_TEXT, TTY_LONGTEXT, true );
 112     add_string( "fb-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
 113                 true );
 114     add_string( "fb-aspect-ratio", NULL, NULL, ASPECT_RATIO_TEXT,
 115                 ASPECT_RATIO_LONGTEXT, true );
 116     add_integer( "fb-mode", 4, NULL, FB_MODE_TEXT, FB_MODE_LONGTEXT,
 117                  true );
 118     add_bool( "fb-hw-accel", true, NULL, HW_ACCEL_TEXT, HW_ACCEL_LONGTEXT,
 119               true );
 120     set_description( N_("GNU/Linux console framebuffer video output") );
 121     set_capability( "video output", 30 );
 122     set_callbacks( Create, Destroy );
 123 vlc_module_end();
 124
 125 /*****************************************************************************
 126  * vout_sys_t: video output framebuffer method descriptor
 127  *****************************************************************************
 128  * This structure is part of the video output thread descriptor.
 129  * It describes the FB specific properties of an output thread.
 130  *****************************************************************************/
 131 struct vout_sys_t
 132 {
 133     /* System information */
 134     int                 i_tty;                          /* tty device handle */
 135     bool          b_tty;
 136     struct termios      old_termios;
 137
 138     /* Original configuration information */
 139     struct sigaction            sig_usr1;           /* USR1 previous handler */
 140     struct sigaction            sig_usr2;           /* USR2 previous handler */
 141     struct vt_mode              vt_mode;                 /* previous VT mode */
 142
 143     /* Framebuffer information */
 144     int                         i_fd;                       /* device handle */
 145     struct fb_var_screeninfo    old_info;       /* original mode information */
 146     struct fb_var_screeninfo    var_info;        /* current mode information */
 147     bool                  b_pan;     /* does device supports panning ? */
 148     struct fb_cmap              fb_cmap;                /* original colormap */
 149     uint16_t                    *p_palette;              /* original palette */
 150     bool                  b_hw_accel;          /* has hardware support */
 151
 152     /* Video information */
 153     uint32_t i_width;
 154     uint32_t i_height;
 155     int i_aspect;
 156     int i_bytes_per_pixel;
 157     bool   b_auto;       /* Automatically adjust video size to fb size */
 158     vlc_fourcc_t i_chroma;
 159
 160     /* Video memory */
 161     uint8_t *    p_video;                                     /* base adress */
 162     size_t      i_page_size;                                    /* page size */
 163 };
 164
 165 struct picture_sys_t
 166 {
 167     uint8_t *    p_data;                                      /* base adress */
 168 };
 169
 170 /*****************************************************************************
 171  * Create: allocates FB video thread output method
 172  *****************************************************************************
 173  * This function allocates and initializes a FB vout method.
 174  *****************************************************************************/
 175 static int Create( vlc_object_t *p_this )
 176 {
 177     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 178     vout_sys_t    *p_sys;
 179     char          *psz_chroma;
 180     char          *psz_aspect;
 181     int           i_mode;
 182     struct sigaction    sig_tty;                 /* sigaction for tty change */
 183     struct vt_mode      vt_mode;                          /* vt current mode */
 184     struct termios      new_termios;
 185
 186     /* Allocate instance and initialize some members */
 187     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 188     if( p_vout->p_sys == NULL )
 189     {
 190         msg_Err( p_vout, "out of memory" );
 191         return VLC_ENOMEM;
 192     };
 193     memset( p_sys, 0, sizeof(vout_sys_t) );
 194
 195     p_vout->pf_init = Init;
 196     p_vout->pf_end = End;
 197     p_vout->pf_manage = Manage;
 198     p_vout->pf_render = NULL;
 199     p_vout->pf_display = Display;
 200     p_vout->pf_control = Control;
 201
 202     /* Does the framebuffer uses hw acceleration? */
 203     p_sys->b_hw_accel = var_CreateGetBool( p_vout, "fb-hw-accel" );
 204
 205     /* Set tty and fb devices */
 206     p_sys->i_tty = 0; /* 0 == /dev/tty0 == current console */
 207     p_sys->b_tty = var_CreateGetBool( p_vout, "fb-tty" );
 208 #ifndef WIN32
 209 #if defined(HAVE_ISATTY)
 210     /* Check that stdin is a TTY */
 211     if( p_sys->b_tty && !isatty( 0 ) )
 212     {
 213         msg_Warn( p_vout, "fd 0 is not a TTY" );
 214         return VLC_EGENERIC;
 215     }
 216     else
 217     {
 218         msg_Warn( p_vout, "disabling tty handling, use with caution because "
 219                           "there is no way to return to the tty." );
 220     }
 221 #endif
 222 #endif
 223
 224     psz_chroma = var_CreateGetNonEmptyString( p_vout, "fb-chroma" );
 225     if( psz_chroma )
 226     {
 227         if( strlen( psz_chroma ) == 4 )
 228         {
 229             p_sys->i_chroma = VLC_FOURCC( psz_chroma[0],
 230                                    psz_chroma[1],
 231                                    psz_chroma[2],
 232                                    psz_chroma[3] );
 233             msg_Dbg( p_vout, "forcing chroma '%s'", psz_chroma );
 234         }
 235         else
 236         {
 237             msg_Warn( p_vout, "invalid chroma (%s), using defaults.",
 238                       psz_chroma );
 239         }
 240         free( psz_chroma );
 241         psz_chroma = NULL;
 242     }
 243
 244     p_sys->i_aspect = -1;
 245     psz_aspect = var_CreateGetNonEmptyString( p_vout, "fb-aspect-ratio" );
 246     if( psz_aspect )
 247     {
 248         char *psz_parser = strchr( psz_aspect, ':' );
 249
 250         if( psz_parser )
 251         {
 252             *psz_parser++ = '\0';
 253             p_sys->i_aspect = ( atoi( psz_aspect )
 254                               * VOUT_ASPECT_FACTOR ) / atoi( psz_parser );
 255         }
 256         msg_Dbg( p_vout, "using aspect ratio %d:%d",
 257                   atoi( psz_aspect ), atoi( psz_parser ) );
 258
 259         free( psz_aspect );
 260         psz_aspect = NULL;
 261     }
 262
 263     p_sys->b_auto = false;
 264     i_mode = var_CreateGetInteger( p_vout, "fb-mode" );
 265     switch( i_mode )
 266     {
 267         case 0: /* QCIF */
 268             p_sys->i_width  = 176;
 269             p_sys->i_height = 144;
 270             break;
 271         case 1: /* CIF */
 272             p_sys->i_width  = 352;
 273             p_sys->i_height = 288;
 274             break;
 275         case 2: /* NTSC */
 276             p_sys->i_width  = 640;
 277             p_sys->i_height = 480;
 278             break;
 279         case 3: /* PAL */
 280             p_sys->i_width  = 704;
 281             p_sys->i_height = 576;
 282             break;
 283         case 4:
 284         default:
 285             p_sys->b_auto = true;
 286             break;
 287      }
 288
 289     /* tty handling */
 290     if( p_sys->b_tty )
 291     {
 292         GfxMode( p_sys->i_tty );
 293
 294         /* Set keyboard settings */
 295         if( tcgetattr(0, &p_vout->p_sys->old_termios) == -1 )
 296         {
 297             msg_Err( p_vout, "tcgetattr failed" );
 298         }
 299
 300         if( tcgetattr(0, &new_termios) == -1 )
 301         {
 302             msg_Err( p_vout, "tcgetattr failed" );
 303         }
 304
 305         /* new_termios.c_lflag &= ~ (ICANON | ISIG);
 306         new_termios.c_lflag |= (ECHO | ECHOCTL); */
 307         new_termios.c_lflag &= ~ (ICANON);
 308         new_termios.c_lflag &= ~(ECHO | ECHOCTL);
 309         new_termios.c_iflag = 0;
 310         new_termios.c_cc[VMIN] = 1;
 311         new_termios.c_cc[VTIME] = 0;
 312
 313         if( tcsetattr(0, TCSAFLUSH, &new_termios) == -1 )
 314         {
 315             msg_Err( p_vout, "tcsetattr failed" );
 316         }
 317
 318         ioctl( p_sys->i_tty, VT_RELDISP, VT_ACKACQ );
 319
 320         /* Set-up tty signal handler to be aware of tty changes */
 321         memset( &sig_tty, 0, sizeof( sig_tty ) );
 322         sig_tty.sa_handler = SwitchDisplay;
 323         sigemptyset( &sig_tty.sa_mask );
 324         if( sigaction( SIGUSR1, &sig_tty, &p_vout->p_sys->sig_usr1 ) ||
 325             sigaction( SIGUSR2, &sig_tty, &p_vout->p_sys->sig_usr2 ) )
 326         {
 327             msg_Err( p_vout, "cannot set signal handler (%m)" );
 328             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 329             TextMode( p_sys->i_tty );
 330             free( p_vout->p_sys );
 331             return VLC_EGENERIC;
 332         }
 333
 334         /* Set-up tty according to new signal handler */
 335         if( -1 == ioctl( p_sys->i_tty, VT_GETMODE, &p_vout->p_sys->vt_mode ) )
 336         {
 337             msg_Err( p_vout, "cannot get terminal mode (%m)" );
 338             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 339             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 340             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 341             TextMode( p_sys->i_tty );
 342             free( p_vout->p_sys );
 343             return VLC_EGENERIC;
 344         }
 345         memcpy( &vt_mode, &p_vout->p_sys->vt_mode, sizeof( vt_mode ) );
 346         vt_mode.mode   = VT_PROCESS;
 347         vt_mode.waitv  = 0;
 348         vt_mode.relsig = SIGUSR1;
 349         vt_mode.acqsig = SIGUSR2;
 350
 351         if( -1 == ioctl( p_sys->i_tty, VT_SETMODE, &vt_mode ) )
 352         {
 353             msg_Err( p_vout, "cannot set terminal mode (%m)" );
 354             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 355             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 356             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 357             TextMode( p_sys->i_tty );
 358             free( p_vout->p_sys );
 359             return VLC_EGENERIC;
 360         }
 361     }
 362
 363     if( OpenDisplay( p_vout ) )
 364     {
 365         if( p_sys->b_tty )
 366         {
 367             ioctl( p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 368             sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 369             sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 370             tcsetattr(0, 0, &p_vout->p_sys->old_termios);
 371             TextMode( p_sys->i_tty );
 372         }
 373         free( p_vout->p_sys );
 374         return VLC_EGENERIC;
 375     }
 376
 377     return VLC_SUCCESS;
 378 }
 379
 380
 381 /*****************************************************************************
 382  * Destroy: destroy FB video thread output method
 383  *****************************************************************************
 384  * Terminate an output method created by Create
 385  *****************************************************************************/
 386 static void Destroy( vlc_object_t *p_this )
 387 {
 388     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 389
 390     CloseDisplay( p_vout );
 391
 392     if( p_vout->p_sys->b_tty )
 393     {
 394         /* Reset the terminal */
 395         ioctl( p_vout->p_sys->i_tty, VT_SETMODE, &p_vout->p_sys->vt_mode );
 396
 397         /* Remove signal handlers */
 398         sigaction( SIGUSR1, &p_vout->p_sys->sig_usr1, NULL );
 399         sigaction( SIGUSR2, &p_vout->p_sys->sig_usr2, NULL );
 400
 401         /* Reset the keyboard state */
 402         tcsetattr( 0, 0, &p_vout->p_sys->old_termios );
 403
 404         /* Return to text mode */
 405         TextMode( p_vout->p_sys->i_tty );
 406     }
 407
 408     /* Destroy structure */
 409     free( p_vout->p_sys );
 410 }
 411
 412 /*****************************************************************************
 413  * NewPicture: allocate a picture
 414  *****************************************************************************
 415  * Returns 0 on success, -1 otherwise
 416  *****************************************************************************/
 417 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 418 {
 419     /* We know the chroma, allocate a buffer which will be used
 420      * directly by the decoder */
 421     p_pic->p_sys = malloc( sizeof( picture_sys_t ) );
 422     if( p_pic->p_sys == NULL )
 423     {
 424         return VLC_ENOMEM;
 425     }
 426
 427     /* Fill in picture_t fields */
 428     vout_InitPicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma,
 429                       p_vout->output.i_width, p_vout->output.i_height,
 430                       p_vout->output.i_aspect );
 431
 432     p_pic->p_sys->p_data = malloc( p_vout->p_sys->i_page_size );
 433     if( !p_pic->p_sys->p_data )
 434     {
 435         free( p_pic->p_sys );
 436         p_pic->p_sys = NULL;
 437         return VLC_ENOMEM;
 438     }
 439
 440     p_pic->p->p_pixels = (uint8_t*) p_pic->p_sys->p_data;
 441
 442     p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 443     p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 444     p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 445
 446     if( p_vout->p_sys->var_info.xres_virtual )
 447     {
 448         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 449                              * p_vout->p_sys->i_bytes_per_pixel;
 450     }
 451     else
 452     {
 453         p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 454                              * p_vout->p_sys->i_bytes_per_pixel;
 455     }
 456
 457     p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 458                                  * p_vout->p_sys->i_bytes_per_pixel;
 459     p_pic->i_planes = 1;
 460
 461     return VLC_SUCCESS;
 462 }
 463
 464 /*****************************************************************************
 465  * FreePicture: destroy a picture allocated with NewPicture
 466  *****************************************************************************
 467  * Destroy Image AND associated data.
 468  *****************************************************************************/
 469 static void FreePicture( vout_thread_t *p_vout, picture_t *p_pic )
 470 {
 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     if( !p_sys->b_auto )
 531     {
 532         p_vout->render.i_width = p_sys->i_width;
 533         p_vout->render.i_height = p_sys->i_height;
 534     }
 535     p_vout->output.i_width  = p_vout->fmt_out.i_width = p_sys->i_width;
 536     p_vout->output.i_height = p_vout->fmt_out.i_height = p_sys->i_height;
 537
 538     /* Assume we have square pixels */
 539     if( p_sys->i_aspect < 0 )
 540     {
 541         p_vout->output.i_aspect = ( p_sys->i_width
 542                                   * VOUT_ASPECT_FACTOR ) / p_sys->i_height;
 543     }
 544     else p_vout->output.i_aspect = p_sys->i_aspect;
 545
 546     p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_sar_den = 1;
 547     p_vout->fmt_out.i_aspect  = p_vout->render.i_aspect = p_vout->output.i_aspect;
 548     p_vout->fmt_out.i_x_offset= p_vout->fmt_out.i_y_offset = 0;
 549
 550     /* Clear the screen */
 551     memset( p_sys->p_video, 0, p_sys->i_page_size );
 552
 553     if( !p_sys->b_hw_accel )
 554     {
 555         /* Try to initialize up to MAX_DIRECTBUFFERS direct buffers */
 556         while( I_OUTPUTPICTURES < MAX_DIRECTBUFFERS )
 557         {
 558             p_pic = NULL;
 559
 560             /* Find an empty picture slot */
 561             for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 562             {
 563             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 564                 {
 565                     p_pic = p_vout->p_picture + i_index;
 566                     break;
 567                 }
 568             }
 569
 570             /* Allocate the picture */
 571             if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 572             {
 573                 break;
 574             }
 575
 576             p_pic->i_status = DESTROYED_PICTURE;
 577             p_pic->i_type   = DIRECT_PICTURE;
 578
 579             PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 580
 581             I_OUTPUTPICTURES++;
 582         }
 583     }
 584     else
 585     {
 586         /* Try to initialize 1 direct buffer */
 587         p_pic = NULL;
 588
 589         /* Find an empty picture slot */
 590         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 591         {
 592             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 593             {
 594                 p_pic = p_vout->p_picture + i_index;
 595                 break;
 596             }
 597         }
 598
 599         /* Allocate the picture */
 600         if( p_pic == NULL )
 601         {
 602             return VLC_EGENERIC;
 603         }
 604
 605         /* We know the chroma, allocate a buffer which will be used
 606         * directly by the decoder */
 607         p_pic->p->p_pixels = p_vout->p_sys->p_video;
 608         p_pic->p->i_pixel_pitch = p_vout->p_sys->i_bytes_per_pixel;
 609         p_pic->p->i_lines = p_vout->p_sys->var_info.yres;
 610         p_pic->p->i_visible_lines = p_vout->p_sys->var_info.yres;
 611
 612         if( p_vout->p_sys->var_info.xres_virtual )
 613         {
 614             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres_virtual
 615                                 * p_vout->p_sys->i_bytes_per_pixel;
 616         }
 617         else
 618         {
 619             p_pic->p->i_pitch = p_vout->p_sys->var_info.xres
 620                                 * p_vout->p_sys->i_bytes_per_pixel;
 621         }
 622
 623         p_pic->p->i_visible_pitch = p_vout->p_sys->var_info.xres
 624                                     * p_vout->p_sys->i_bytes_per_pixel;
 625         p_pic->i_planes = 1;
 626         p_pic->i_status = DESTROYED_PICTURE;
 627         p_pic->i_type   = DIRECT_PICTURE;
 628
 629         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 630
 631         I_OUTPUTPICTURES++;
 632     }
 633
 634     return VLC_SUCCESS;
 635 }
 636
 637 /*****************************************************************************
 638  * End: terminate framebuffer video thread output method
 639  *****************************************************************************/
 640 static void End( vout_thread_t *p_vout )
 641 {
 642     if( !p_vout->p_sys->b_hw_accel )
 643     {
 644         int i_index;
 645
 646         /* Free the direct buffers we allocated */
 647         for( i_index = I_OUTPUTPICTURES ; i_index ; )
 648         {
 649             i_index--;
 650             FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
 651         }
 652
 653     }
 654     /* Clear the screen */
 655     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 656 }
 657
 658 /*****************************************************************************
 659  * Control: control facility for the vout
 660  *****************************************************************************/
 661 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 662 {
 663     switch( i_query )
 664     {
 665        default:
 666             return vout_vaControlDefault( p_vout, i_query, args );
 667     }
 668 }
 669
 670 /*****************************************************************************
 671  * Manage: handle FB events
 672  *****************************************************************************
 673  * This function should be called regularly by video output thread. It manages
 674  * console events. It returns a non null value on error.
 675  *****************************************************************************/
 676 static int Manage( vout_thread_t *p_vout )
 677 {
 678 #if 0
 679     uint8_t buf;
 680
 681     if ( read(0, &buf, 1) == 1)
 682     {
 683         switch( buf )
 684         {
 685         case 'q':
 686             vlc_object_kill( p_vout->p_libvlc );
 687             break;
 688
 689         default:
 690             break;
 691         }
 692     }
 693 #endif
 694
 695     /*
 696      * Size change
 697      */
 698     if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 699     {
 700         msg_Dbg( p_vout, "reinitializing framebuffer screen" );
 701         p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 702
 703         /* Destroy XImages to change their size */
 704         End( p_vout );
 705
 706         /* Recreate XImages. If SysInit failed, the thread can't go on. */
 707         if( Init( p_vout ) )
 708         {
 709             msg_Err( p_vout, "cannot reinit framebuffer screen" );
 710             return VLC_EGENERIC;
 711         }
 712
 713         /* Clear screen */
 714         memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 715
 716 #if 0
 717         /* Tell the video output thread that it will need to rebuild YUV
 718          * tables. This is needed since conversion buffer size may have changed */
 719         p_vout->i_changes |= VOUT_YUV_CHANGE;
 720 #endif
 721     }
 722
 723     return VLC_SUCCESS;
 724 }
 725
 726 /*****************************************************************************
 727  * Display: displays previously rendered output
 728  *****************************************************************************
 729  * This function send the currently rendered image to FB image, waits until
 730  * it is displayed and switch the two rendering buffers, preparing next frame.
 731  *****************************************************************************/
 732 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 733 {
 734 static int panned=0;
 735     /* swap the two Y offsets if the drivers supports panning */
 736     if( p_vout->p_sys->b_pan )
 737     {
 738         p_vout->p_sys->var_info.yoffset = 0;
 739         /*p_vout->p_sys->var_info.yoffset = p_vout->p_sys->var_info.yres; */
 740
 741         /* the X offset should be 0, but who knows ...
 742          * some other app might have played with the framebuffer */
 743         p_vout->p_sys->var_info.xoffset = 0;
 744
 745         if( panned < 0 )
 746         {
 747             ioctl( p_vout->p_sys->i_fd,
 748                    FBIOPAN_DISPLAY, &p_vout->p_sys->var_info );
 749             panned++;
 750         }
 751     }
 752
 753     if( !p_vout->p_sys->b_hw_accel )
 754     {
 755         vlc_memcpy( p_vout->p_sys->p_video, p_pic->p->p_pixels,
 756                     p_vout->p_sys->i_page_size );
 757     }
 758 }
 759
 760 #if 0
 761 static void SetPalette( vout_thread_t *p_vout, uint16_t *red, uint16_t *green,
 762                                                uint16_t *blue, uint16_t *transp )
 763 {
 764     struct fb_cmap cmap = { 0, 256, red, green, blue, transp };
 765
 766     ioctl( p_vout->p_sys->i_fd, FBIOPUTCMAP, &cmap );
 767 }
 768 #endif
 769
 770 /* following functions are local */
 771
 772 /*****************************************************************************
 773  * OpenDisplay: initialize framebuffer
 774  *****************************************************************************/
 775 static int OpenDisplay( vout_thread_t *p_vout )
 776 {
 777     vout_sys_t *p_sys = (vout_sys_t *) p_vout->p_sys;
 778     char *psz_device;                             /* framebuffer device path */
 779     struct fb_fix_screeninfo    fix_info;     /* framebuffer fix information */
 780
 781     /* Open framebuffer device */
 782     if( !(psz_device = config_GetPsz( p_vout, FB_DEV_VAR )) )
 783     {
 784         msg_Err( p_vout, "don't know which fb device to open" );
 785         return VLC_EGENERIC;
 786     }
 787
 788     p_sys->i_fd = open( psz_device, O_RDWR);
 789     if( p_sys->i_fd == -1 )
 790     {
 791         msg_Err( p_vout, "cannot open %s (%m)", psz_device );
 792         free( psz_device );
 793         return VLC_EGENERIC;
 794     }
 795     free( psz_device );
 796     psz_device = NULL;
 797
 798     /* Get framebuffer device information */
 799     if( ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 800     {
 801         msg_Err( p_vout, "cannot get fb info (%m)" );
 802         close( p_sys->i_fd );
 803         return VLC_EGENERIC;
 804     }
 805
 806     memcpy( &p_sys->old_info, &p_sys->var_info,
 807             sizeof( struct fb_var_screeninfo ) );
 808
 809     /* Get some info on the framebuffer itself */
 810     if( !p_sys->b_auto )
 811     {
 812         p_sys->var_info.xres = p_sys->var_info.xres_virtual = p_sys->i_width;
 813         p_sys->var_info.yres = p_sys->var_info.yres_virtual = p_sys->i_height;
 814         p_vout->fmt_out.i_width = p_sys->i_width;
 815         p_vout->fmt_out.i_height = p_sys->i_height;
 816     }
 817
 818     /* Set some attributes */
 819     p_sys->var_info.activate = p_sys->b_tty
 820                                ? FB_ACTIVATE_NXTOPEN
 821                                : FB_ACTIVATE_NOW;
 822     p_sys->var_info.xoffset =  0;
 823     p_sys->var_info.yoffset =  0;
 824
 825     if( ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->var_info ) )
 826     {
 827         msg_Err( p_vout, "cannot set fb info (%m)" );
 828         close( p_sys->i_fd );
 829         return VLC_EGENERIC;
 830     }
 831
 832     /* Get some information again, in the definitive configuration */
 833     if( ioctl( p_sys->i_fd, FBIOGET_FSCREENINFO, &fix_info )
 834          || ioctl( p_sys->i_fd, FBIOGET_VSCREENINFO, &p_sys->var_info ) )
 835     {
 836         msg_Err( p_vout, "cannot get additional fb info (%m)" );
 837
 838         /* Restore fb config */
 839         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 840
 841         close( p_sys->i_fd );
 842         return VLC_EGENERIC;
 843     }
 844
 845     /* If the fb has limitations on mode change,
 846      * then keep the resolution of the fb */
 847     if( (p_sys->i_height != p_sys->var_info.yres) ||
 848         (p_sys->i_width != p_sys->var_info.xres) )
 849     {
 850         p_sys->b_auto = true;
 851         msg_Warn( p_vout,
 852                   "using framebuffer native resolution instead of requested (%ix%i)",
 853                   p_sys->i_width, p_sys->i_height );
 854     }
 855     p_sys->i_height = p_sys->var_info.yres;
 856     p_sys->i_width  = p_sys->var_info.xres_virtual
 857                                ? p_sys->var_info.xres_virtual
 858                                : p_sys->var_info.xres;
 859
 860     /* FIXME: if the image is full-size, it gets cropped on the left
 861      * because of the xres / xres_virtual slight difference */
 862     msg_Dbg( p_vout, "%ix%i (virtual %ix%i) (request %ix%i)",
 863              p_sys->var_info.xres, p_sys->var_info.yres,
 864              p_sys->var_info.xres_virtual,
 865              p_sys->var_info.yres_virtual,
 866              p_sys->i_width, p_sys->i_height );
 867
 868     p_sys->p_palette = NULL;
 869     p_sys->b_pan = ( fix_info.ypanstep || fix_info.ywrapstep );
 870
 871     switch( p_sys->var_info.bits_per_pixel )
 872     {
 873     case 8:
 874         p_sys->p_palette = malloc( 8 * 256 * sizeof( uint16_t ) );
 875         if( !p_sys->p_palette )
 876         {
 877             msg_Err( p_vout, "out of memory" );
 878
 879             /* Restore fb config */
 880             ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 881
 882             close( p_sys->i_fd );
 883             return VLC_ENOMEM;
 884         }
 885         p_sys->fb_cmap.start = 0;
 886         p_sys->fb_cmap.len = 256;
 887         p_sys->fb_cmap.red = p_sys->p_palette;
 888         p_sys->fb_cmap.green = p_sys->p_palette + 256 * sizeof( uint16_t );
 889         p_sys->fb_cmap.blue = p_sys->p_palette + 2 * 256 * sizeof( uint16_t );
 890         p_sys->fb_cmap.transp = p_sys->p_palette + 3 * 256 * sizeof( uint16_t );
 891
 892         /* Save the colormap */
 893         ioctl( p_sys->i_fd, FBIOGETCMAP, &p_sys->fb_cmap );
 894
 895         p_sys->i_bytes_per_pixel = 1;
 896         break;
 897
 898     case 15:
 899     case 16:
 900         p_sys->i_bytes_per_pixel = 2;
 901         break;
 902
 903     case 24:
 904         p_sys->i_bytes_per_pixel = 3;
 905         break;
 906
 907     case 32:
 908         p_sys->i_bytes_per_pixel = 4;
 909         break;
 910
 911     default:
 912         msg_Err( p_vout, "screen depth %d is not supported",
 913                          p_sys->var_info.bits_per_pixel );
 914
 915         /* Restore fb config */
 916         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_sys->old_info );
 917
 918         close( p_sys->i_fd );
 919         return VLC_EGENERIC;
 920     }
 921
 922     p_sys->i_page_size = p_sys->i_width * p_sys->i_height *
 923                          p_sys->i_bytes_per_pixel;
 924
 925     /* Map a framebuffer at the beginning */
 926     p_sys->p_video = mmap( 0, p_sys->i_page_size,
 927                               PROT_READ | PROT_WRITE, MAP_SHARED,
 928                               p_sys->i_fd, 0 );
 929
 930     if( p_sys->p_video == ((void*)-1) )
 931     {
 932         msg_Err( p_vout, "cannot map video memory (%m)" );
 933
 934         if( p_sys->var_info.bits_per_pixel == 8 )
 935         {
 936             free( p_sys->p_palette );
 937             p_sys->p_palette = NULL;
 938         }
 939
 940         /* Restore fb config */
 941         ioctl( p_sys->i_fd, FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 942
 943         close( p_sys->i_fd );
 944         return VLC_EGENERIC;
 945     }
 946
 947     msg_Dbg( p_vout, "framebuffer type=%d, visual=%d, ypanstep=%d, "
 948              "ywrap=%d, accel=%d", fix_info.type, fix_info.visual,
 949              fix_info.ypanstep, fix_info.ywrapstep, fix_info.accel );
 950     return VLC_SUCCESS;
 951 }
 952
 953 /*****************************************************************************
 954  * CloseDisplay: terminate FB video thread output method
 955  *****************************************************************************/
 956 static void CloseDisplay( vout_thread_t *p_vout )
 957 {
 958     /* Clear display */
 959     memset( p_vout->p_sys->p_video, 0, p_vout->p_sys->i_page_size );
 960
 961     /* Restore palette */
 962     if( p_vout->p_sys->var_info.bits_per_pixel == 8 )
 963     {
 964         ioctl( p_vout->p_sys->i_fd,
 965                FBIOPUTCMAP, &p_vout->p_sys->fb_cmap );
 966         free( p_vout->p_sys->p_palette );
 967         p_vout->p_sys->p_palette = NULL;
 968     }
 969
 970     /* Restore fb config */
 971     ioctl( p_vout->p_sys->i_fd,
 972            FBIOPUT_VSCREENINFO, &p_vout->p_sys->old_info );
 973
 974     /* Close fb */
 975     close( p_vout->p_sys->i_fd );
 976 }
 977
 978 /*****************************************************************************
 979  * SwitchDisplay: VT change signal handler
 980  *****************************************************************************
 981  * This function activates or deactivates the output of the thread. It is
 982  * called by the VT driver, on terminal change.
 983  *****************************************************************************/
 984 static void SwitchDisplay( int i_signal )
 985 {
 986 #if 0
 987     vout_thread_t *p_vout;
 988
 989     vlc_mutex_lock( &p_vout_bank->lock );
 990
 991     /* XXX: only test the first video output */
 992     if( p_vout_bank->i_count )
 993     {
 994         p_vout = p_vout_bank->pp_vout[0];
 995
 996         switch( i_signal )
 997         {
 998         case SIGUSR1:                                /* vt has been released */
 999             p_vout->b_active = 0;
1000             ioctl( p_sys->i_tty, VT_RELDISP, 1 );
1001             break;
1002         case SIGUSR2:                                /* vt has been acquired */
1003             p_vout->b_active = 1;
1004             ioctl( p_sys->i_tty, VT_RELDISP, VT_ACTIVATE );
1005             /* handle blanking */
1006             vlc_mutex_lock( &p_vout->change_lock );
1007             p_vout->i_changes |= VOUT_SIZE_CHANGE;
1008             vlc_mutex_unlock( &p_vout->change_lock );
1009             break;
1010         }
1011     }
1012
1013     vlc_mutex_unlock( &p_vout_bank->lock );
1014 #endif
1015 }
1016
1017 /*****************************************************************************
1018  * TextMode and GfxMode : switch tty to text/graphic mode
1019  *****************************************************************************
1020  * These functions toggle the tty mode.
1021  *****************************************************************************/
1022 static void TextMode( int i_tty )
1023 {
1024     /* return to text mode */
1025     if( -1 == ioctl(i_tty, KDSETMODE, KD_TEXT) )
1026     {
1027         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_TEXT" );*/
1028     }
1029 }
1030
1031 static void GfxMode( int i_tty )
1032 {
1033     /* switch to graphic mode */
1034     if( -1 == ioctl(i_tty, KDSETMODE, KD_GRAPHICS) )
1035     {
1036         /*msg_Err( p_vout, "failed ioctl KDSETMODE KD_GRAPHICS" );*/
1037     }
1038 }