modules/codec/cc.c

   1 /*****************************************************************************
   2  * cc608.c : CC 608/708 subtitles decoder
   3  *****************************************************************************
   4  * Copyright (C) 2007 Laurent Aimar
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar < fenrir # via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 /* The EIA 608 decoder part has been initialy based on ccextractor (GPL)
  28  * and rewritten */
  29
  30 /* TODO:
  31  *  On discontinuity reset the decoder state
  32  *  Check parity
  33  *  708 decoding
  34  */
  35
  36 #ifdef HAVE_CONFIG_H
  37 # include "config.h"
  38 #endif
  39
  40 #include <vlc_common.h>
  41 #include <vlc_plugin.h>
  42 #include <vlc_codec.h>
  43 #include <vlc_input.h>
  44
  45 #include <vlc_filter.h>
  46 #include <vlc_image.h>
  47 #include <vlc_charset.h>
  48 #include <vlc_stream.h>
  49 #include <vlc_xml.h>
  50 #include <string.h>
  51
  52 #include <assert.h>
  53
  54 /*****************************************************************************
  55  * Module descriptor.
  56  *****************************************************************************/
  57 static int  Open ( vlc_object_t * );
  58 static void Close( vlc_object_t * );
  59
  60 vlc_module_begin ()
  61     set_shortname( N_("CC 608/708"))
  62     set_description( N_("Closed Captions decoder") )
  63     set_capability( "decoder", 50 )
  64     set_callbacks( Open, Close )
  65 vlc_module_end ()
  66
  67 /*****************************************************************************
  68  * Local prototypes
  69  *****************************************************************************/
  70 typedef enum
  71 {
  72     EIA608_MODE_POPUP = 0,
  73     EIA608_MODE_ROLLUP_2 = 1,
  74     EIA608_MODE_ROLLUP_3 = 2,
  75     EIA608_MODE_ROLLUP_4 = 3,
  76     EIA608_MODE_PAINTON = 4,
  77     EIA608_MODE_TEXT = 5
  78 } eia608_mode_t;
  79
  80 typedef enum
  81 {
  82     EIA608_COLOR_WHITE = 0,
  83     EIA608_COLOR_GREEN = 1,
  84     EIA608_COLOR_BLUE = 2,
  85     EIA608_COLOR_CYAN = 3,
  86     EIA608_COLOR_RED = 4,
  87     EIA608_COLOR_YELLOW = 5,
  88     EIA608_COLOR_MAGENTA = 6,
  89     EIA608_COLOR_USERDEFINED = 7
  90 } eia608_color_t;
  91
  92 typedef enum
  93 {
  94     EIA608_FONT_REGULAR    = 0x00,
  95     EIA608_FONT_ITALICS    = 0x01,
  96     EIA608_FONT_UNDERLINE  = 0x02,
  97     EIA608_FONT_UNDERLINE_ITALICS = EIA608_FONT_UNDERLINE | EIA608_FONT_ITALICS
  98 } eia608_font_t;
  99
 100 #define EIA608_SCREEN_ROWS 15
 101 #define EIA608_SCREEN_COLUMNS 32
 102
 103 struct eia608_screen // A CC buffer
 104 {
 105     uint8_t characters[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
 106     eia608_color_t colors[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
 107     eia608_font_t fonts[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1]; // Extra char at the end for a 0
 108     int row_used[EIA608_SCREEN_ROWS]; // Any data in row?
 109 };
 110 typedef struct eia608_screen eia608_screen;
 111
 112 typedef struct
 113 {
 114     /* Current channel (used to reject packet without channel information) */
 115     int i_channel;
 116
 117     /* */
 118     int           i_screen; /* Displayed screen */
 119     eia608_screen screen[2];
 120
 121     struct
 122     {
 123         int i_row;
 124         int i_column;
 125     } cursor;
 126
 127     /* */
 128     eia608_mode_t mode;
 129     eia608_color_t color;
 130     eia608_font_t font;
 131     int i_row_rollup;
 132
 133     /* Last command pair (used to reject duplicated command) */
 134     struct
 135     {
 136         uint8_t d1;
 137         uint8_t d2;
 138     } last;
 139 } eia608_t;
 140
 141 static void         Eia608Init( eia608_t * );
 142 static bool   Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] );
 143 static char        *Eia608Text( eia608_t *h, bool b_html );
 144 static void         Eia608Exit( eia608_t * );
 145
 146 /* It will be enough up to 63 B frames, which is far too high for
 147  * broadcast environment */
 148 #define CC_MAX_REORDER_SIZE (64)
 149 struct decoder_sys_t
 150 {
 151     int i;
 152
 153     int     i_block;
 154     block_t *pp_block[CC_MAX_REORDER_SIZE];
 155
 156     int i_field;
 157     int i_channel;
 158
 159     eia608_t eia608;
 160 };
 161
 162 static subpicture_t *Decode( decoder_t *, block_t ** );
 163
 164 /*****************************************************************************
 165  * Open: probe the decoder and return score
 166  *****************************************************************************
 167  * Tries to launch a decoder and return score so that the interface is able
 168  * to chose.
 169  *****************************************************************************/
 170 static int Open( vlc_object_t *p_this )
 171 {
 172     decoder_t     *p_dec = (decoder_t*)p_this;
 173     decoder_sys_t *p_sys;
 174     int i_field;
 175     int i_channel;
 176
 177     switch( p_dec->fmt_in.i_codec )
 178     {
 179         case VLC_FOURCC('c','c','1',' '):
 180             i_field = 0; i_channel = 1;
 181             break;
 182         case VLC_FOURCC('c','c','2',' '):
 183             i_field = 0; i_channel = 2;
 184             break;
 185         case VLC_FOURCC('c','c','3',' '):
 186             i_field = 1; i_channel = 1;
 187             break;
 188         case VLC_FOURCC('c','c','4',' '):
 189             i_field = 1; i_channel = 2;
 190             break;
 191
 192         default:
 193             return VLC_EGENERIC;
 194     }
 195
 196     p_dec->pf_decode_sub = Decode;
 197
 198     /* Allocate the memory needed to store the decoder's structure */
 199     p_dec->p_sys = p_sys = calloc( 1, sizeof( *p_sys ) );
 200     if( p_sys == NULL )
 201         return VLC_ENOMEM;
 202
 203     /* init of p_sys */
 204     p_sys->i_field = i_field;
 205     p_sys->i_channel = i_channel;
 206
 207     Eia608Init( &p_sys->eia608 );
 208
 209     p_dec->fmt_out.i_cat = SPU_ES;
 210     p_dec->fmt_out.i_codec = VLC_CODEC_TEXT;
 211
 212     return VLC_SUCCESS;
 213 }
 214
 215 /****************************************************************************
 216  * Decode: the whole thing
 217  ****************************************************************************
 218  *
 219  ****************************************************************************/
 220 static void     Push( decoder_t *, block_t * );
 221 static block_t *Pop( decoder_t * );
 222 static subpicture_t *Convert( decoder_t *, block_t * );
 223
 224 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
 225 {
 226     if( pp_block && *pp_block )
 227     {
 228         Push( p_dec, *pp_block );
 229         *pp_block = NULL;
 230     }
 231
 232     for( ;; )
 233     {
 234         block_t *p_block = Pop( p_dec );
 235         if( !p_block )
 236             break;
 237
 238         subpicture_t *p_spu = Convert( p_dec, p_block );
 239         if( p_spu )
 240             return p_spu;
 241     }
 242     return NULL;
 243 }
 244
 245 /*****************************************************************************
 246  * CloseDecoder: clean up the decoder
 247  *****************************************************************************/
 248 static void Close( vlc_object_t *p_this )
 249 {
 250     decoder_t *p_dec = (decoder_t *)p_this;
 251     decoder_sys_t *p_sys = p_dec->p_sys;
 252     int i;
 253
 254     for( i = 0; i < p_sys->i_block; i++ )
 255         block_Release( p_sys->pp_block[i] );
 256     Eia608Exit( &p_sys->eia608 );
 257     free( p_sys );
 258 }
 259
 260 /*****************************************************************************
 261  *
 262  *****************************************************************************/
 263 static void Push( decoder_t *p_dec, block_t *p_block )
 264 {
 265     decoder_sys_t *p_sys = p_dec->p_sys;
 266
 267     if( p_sys->i_block >= CC_MAX_REORDER_SIZE )
 268     {
 269         msg_Warn( p_dec, "Trashing a CC entry" );
 270         memmove( &p_sys->pp_block[0], &p_sys->pp_block[1], sizeof(*p_sys->pp_block) * (CC_MAX_REORDER_SIZE-1) );
 271         p_sys->i_block--;
 272     }
 273     p_sys->pp_block[p_sys->i_block++] = p_block;
 274 }
 275 static block_t *Pop( decoder_t *p_dec )
 276 {
 277     decoder_sys_t *p_sys = p_dec->p_sys;
 278     block_t *p_block;
 279     int i_index;
 280     int i;
 281     /* XXX Cc captions data are OUT OF ORDER (because we receive them in the bitstream
 282      * order (ie ordered by video picture dts) instead of the display order.
 283      *  We will simulate a simple IPB buffer scheme
 284      * and reorder with pts.
 285      * XXX it won't work with H264 which use non out of order B picture or MMCO
 286      */
 287
 288     /* Wait for a P and output all *previous* picture by pts order (for
 289      * hierarchical B frames) */
 290     if( p_sys->i_block <= 1 ||
 291         ( p_sys->pp_block[p_sys->i_block-1]->i_flags & BLOCK_FLAG_TYPE_B ) )
 292         return NULL;
 293
 294     p_block = p_sys->pp_block[i_index = 0];
 295     if( p_block->i_pts > VLC_TS_INVALID )
 296     {
 297         for( i = 1; i < p_sys->i_block-1; i++ )
 298         {
 299             if( p_sys->pp_block[i]->i_pts > VLC_TS_INVALID && p_block->i_pts > VLC_TS_INVALID &&
 300                 p_sys->pp_block[i]->i_pts < p_block->i_pts )
 301                 p_block = p_sys->pp_block[i_index = i];
 302         }
 303     }
 304     assert( i_index+1 < p_sys->i_block );
 305     memmove( &p_sys->pp_block[i_index], &p_sys->pp_block[i_index+1], sizeof(*p_sys->pp_block) * ( p_sys->i_block - i_index - 1 ) );
 306     p_sys->i_block--;
 307
 308     return p_block;
 309 }
 310
 311 static subpicture_t *Subtitle( decoder_t *p_dec, char *psz_subtitle, char *psz_html, mtime_t i_pts )
 312 {
 313     //decoder_sys_t *p_sys = p_dec->p_sys;
 314     subpicture_t *p_spu = NULL;
 315     video_format_t fmt;
 316
 317     /* We cannot display a subpicture with no date */
 318     if( i_pts <= VLC_TS_INVALID )
 319     {
 320         msg_Warn( p_dec, "subtitle without a date" );
 321         return NULL;
 322     }
 323
 324     EnsureUTF8( psz_subtitle );
 325     if( psz_html )
 326         EnsureUTF8( psz_html );
 327
 328     /* Create the subpicture unit */
 329     p_spu = decoder_NewSubpicture( p_dec, NULL );
 330     if( !p_spu )
 331     {
 332         msg_Warn( p_dec, "can't get spu buffer" );
 333         free( psz_subtitle );
 334         free( psz_html );
 335         return NULL;
 336     }
 337
 338     /* Create a new subpicture region */
 339     memset( &fmt, 0, sizeof(video_format_t) );
 340     fmt.i_chroma = VLC_CODEC_TEXT;
 341     fmt.i_width = fmt.i_height = 0;
 342     fmt.i_x_offset = fmt.i_y_offset = 0;
 343     p_spu->p_region = subpicture_region_New( &fmt );
 344     if( !p_spu->p_region )
 345     {
 346         msg_Err( p_dec, "cannot allocate SPU region" );
 347         free( psz_subtitle );
 348         free( psz_html );
 349         decoder_DeleteSubpicture( p_dec, p_spu );
 350         return NULL;
 351     }
 352
 353     /* Decode and format the subpicture unit */
 354     /* Normal text subs, easy markup */
 355     p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM;// | SUBPICTURE_ALIGN_LEFT;// | p_sys->i_align;
 356     p_spu->p_region->i_x = 0; //p_sys->i_align ? 20 : 0;
 357     p_spu->p_region->i_y = 10;
 358
 359     p_spu->p_region->psz_text = psz_subtitle;
 360     p_spu->p_region->psz_html = psz_html;
 361
 362     p_spu->i_start = i_pts;
 363     p_spu->i_stop = i_pts + 10000000;   /* 10s max */
 364     p_spu->b_ephemer = true;
 365     p_spu->b_absolute = false;
 366
 367     return p_spu;
 368 }
 369
 370 static subpicture_t *Convert( decoder_t *p_dec, block_t *p_block )
 371 {
 372     assert( p_block );
 373
 374     decoder_sys_t *p_sys = p_dec->p_sys;
 375     const int64_t i_pts = p_block->i_pts;
 376     bool b_changed = false;
 377
 378     /* TODO do the real decoding here */
 379     while( p_block->i_buffer >= 3 )
 380     {
 381         if( p_block->p_buffer[0] == p_sys->i_field )
 382             b_changed |= Eia608Parse( &p_sys->eia608, p_sys->i_channel, &p_block->p_buffer[1] );
 383
 384         p_block->i_buffer -= 3;
 385         p_block->p_buffer += 3;
 386     }
 387     if( p_block )
 388         block_Release( p_block );
 389
 390     if( b_changed )
 391     {
 392         char *psz_subtitle = Eia608Text( &p_sys->eia608, false );
 393         char *psz_html     = NULL;//Eia608Text( &p_sys->eia608, true );
 394         return Subtitle( p_dec, psz_subtitle, psz_html, i_pts );
 395     }
 396     return NULL;
 397 }
 398
 399
 400 /*****************************************************************************
 401  *
 402  *****************************************************************************/
 403 static const struct {
 404     eia608_color_t  i_color;
 405     eia608_font_t   i_font;
 406     int             i_column;
 407 } pac2_attribs[]= {
 408     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,           0 },
 409     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,         0 },
 410     { EIA608_COLOR_GREEN,   EIA608_FONT_REGULAR,           0 },
 411     { EIA608_COLOR_GREEN,   EIA608_FONT_UNDERLINE,         0 },
 412     { EIA608_COLOR_BLUE,    EIA608_FONT_REGULAR,           0 },
 413     { EIA608_COLOR_BLUE,    EIA608_FONT_UNDERLINE,         0 },
 414     { EIA608_COLOR_CYAN,    EIA608_FONT_REGULAR,           0 },
 415     { EIA608_COLOR_CYAN,    EIA608_FONT_UNDERLINE,         0 },
 416     { EIA608_COLOR_RED,     EIA608_FONT_REGULAR,           0 },
 417     { EIA608_COLOR_RED,     EIA608_FONT_UNDERLINE,         0 },
 418     { EIA608_COLOR_YELLOW,  EIA608_FONT_REGULAR,           0 },
 419     { EIA608_COLOR_YELLOW,  EIA608_FONT_UNDERLINE,         0 },
 420     { EIA608_COLOR_MAGENTA, EIA608_FONT_REGULAR,           0 },
 421     { EIA608_COLOR_MAGENTA, EIA608_FONT_UNDERLINE,         0 },
 422     { EIA608_COLOR_WHITE,   EIA608_FONT_ITALICS,           0 },
 423     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE_ITALICS, 0 },
 424
 425     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,           0 },
 426     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,         0 },
 427     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,           4 },
 428     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,         4 },
 429     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,           8 },
 430     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,         8 },
 431     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,          12 },
 432     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,        12 },
 433     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,          16 },
 434     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,        16 },
 435     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,          20 },
 436     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,        20 },
 437     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,          24 },
 438     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,        24 },
 439     { EIA608_COLOR_WHITE,   EIA608_FONT_REGULAR,          28 },
 440     { EIA608_COLOR_WHITE,   EIA608_FONT_UNDERLINE,        28 } ,
 441 };
 442
 443 #define EIA608_COLOR_DEFAULT EIA608_COLOR_WHITE
 444
 445 static void Eia608Cursor( eia608_t *h, int dx )
 446 {
 447     h->cursor.i_column += dx;
 448     if( h->cursor.i_column < 0 )
 449         h->cursor.i_column = 0;
 450     else if( h->cursor.i_column > EIA608_SCREEN_COLUMNS-1 )
 451         h->cursor.i_column = EIA608_SCREEN_COLUMNS-1;
 452 }
 453 static void Eia608ClearScreenRowX( eia608_t *h, int i_screen, int i_row, int x )
 454 {
 455     eia608_screen *screen = &h->screen[i_screen];
 456     int i;
 457
 458     if( x == 0 )
 459     {
 460         screen->row_used[i_row] = false;
 461     }
 462     else
 463     {
 464         screen->row_used[i_row] = false;
 465         for( i = 0; i < x; i++ )
 466         {
 467             if( screen->characters[i_row][i] != ' ' ||
 468                 screen->colors[i_row][i] != EIA608_COLOR_DEFAULT ||
 469                 screen->fonts[i_row][i] != EIA608_FONT_REGULAR )
 470             {
 471                 screen->row_used[i_row] = true;
 472                 break;
 473             }
 474         }
 475     }
 476
 477     for( ; x < EIA608_SCREEN_COLUMNS+1; x++ )
 478     {
 479         screen->characters[i_row][x] = x < EIA608_SCREEN_COLUMNS ? ' ' : '\0';
 480         screen->colors[i_row][x] = EIA608_COLOR_DEFAULT;
 481         screen->fonts[i_row][x] = EIA608_FONT_REGULAR;
 482     }
 483 }
 484
 485 static void Eia608ClearScreenRow( eia608_t *h, int i_screen, int i_row )
 486 {
 487     Eia608ClearScreenRowX( h, i_screen, i_row, 0 );
 488 }
 489
 490 static void Eia608ClearScreen( eia608_t *h, int i_screen )
 491 {
 492     int i;
 493     for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
 494         Eia608ClearScreenRow( h, i_screen, i );
 495 }
 496
 497 static int Eia608GetWritingScreenIndex( eia608_t *h )
 498 {
 499     switch( h->mode )
 500     {
 501     case EIA608_MODE_POPUP:    // Non displayed screen
 502         return 1 - h->i_screen;
 503
 504     case EIA608_MODE_ROLLUP_2: // Displayed screen
 505     case EIA608_MODE_ROLLUP_3:
 506     case EIA608_MODE_ROLLUP_4:
 507     case EIA608_MODE_PAINTON:
 508         return h->i_screen;
 509     default:
 510         /* It cannot happen, else it is a bug */
 511         assert( 0 );
 512         return 0;
 513     }
 514 }
 515
 516 static void Eia608EraseScreen( eia608_t *h, bool b_displayed )
 517 {
 518     Eia608ClearScreen( h, b_displayed ? h->i_screen : (1-h->i_screen) );
 519 }
 520
 521 static void Eia608Write( eia608_t *h, const uint8_t c )
 522 {
 523     const int i_row = h->cursor.i_row;
 524     const int i_column = h->cursor.i_column;
 525     eia608_screen *screen;
 526
 527     if( h->mode == EIA608_MODE_TEXT )
 528         return;
 529
 530     screen = &h->screen[Eia608GetWritingScreenIndex( h )];
 531
 532     screen->characters[i_row][i_column] = c;
 533     screen->colors[i_row][i_column] = h->color;
 534     screen->fonts[i_row][i_column] = h->font;
 535     screen->row_used[i_row] = true;
 536     Eia608Cursor( h, 1 );
 537 }
 538 static void Eia608Erase( eia608_t *h )
 539 {
 540     const int i_row = h->cursor.i_row;
 541     const int i_column = h->cursor.i_column - 1;
 542     eia608_screen *screen;
 543
 544     if( h->mode == EIA608_MODE_TEXT )
 545         return;
 546     if( i_column < 0 )
 547         return;
 548
 549     screen = &h->screen[Eia608GetWritingScreenIndex( h )];
 550
 551     /* FIXME do we need to reset row_used/colors/font ? */
 552     screen->characters[i_row][i_column] = ' ';
 553     Eia608Cursor( h, -1 );
 554 }
 555 static void Eia608EraseToEndOfRow( eia608_t *h )
 556 {
 557     if( h->mode == EIA608_MODE_TEXT )
 558         return;
 559
 560     Eia608ClearScreenRowX( h, Eia608GetWritingScreenIndex( h ), h->cursor.i_row, h->cursor.i_column );
 561 }
 562
 563 static void Eia608RollUp( eia608_t *h )
 564 {
 565     if( h->mode == EIA608_MODE_TEXT )
 566         return;
 567
 568     const int i_screen = Eia608GetWritingScreenIndex( h );
 569     eia608_screen *screen = &h->screen[i_screen];
 570
 571     int keep_lines;
 572     int i;
 573
 574     /* Window size */
 575     if( h->mode == EIA608_MODE_ROLLUP_2 )
 576         keep_lines = 2;
 577     else if( h->mode == EIA608_MODE_ROLLUP_3 )
 578         keep_lines = 3;
 579     else if( h->mode == EIA608_MODE_ROLLUP_4 )
 580         keep_lines = 4;
 581     else
 582         return;
 583
 584     /* Reset the cursor */
 585     h->cursor.i_column = 0;
 586
 587     /* Erase lines above our window */
 588     for( i = 0; i < h->cursor.i_row - keep_lines; i++ )
 589         Eia608ClearScreenRow( h, i_screen, i );
 590
 591     /* Move up */
 592     for( i = 0; i < keep_lines-1; i++ )
 593     {
 594         const int i_row = h->cursor.i_row - keep_lines + i + 1;
 595         if( i_row < 0 )
 596             continue;
 597         assert( i_row+1 < EIA608_SCREEN_ROWS );
 598         memcpy( screen->characters[i_row], screen->characters[i_row+1], sizeof(*screen->characters) );
 599         memcpy( screen->colors[i_row], screen->colors[i_row+1], sizeof(*screen->colors) );
 600         memcpy( screen->fonts[i_row], screen->fonts[i_row+1], sizeof(*screen->fonts) );
 601         screen->row_used[i_row] = screen->row_used[i_row+1];
 602     }
 603     /* Reset current row */
 604     Eia608ClearScreenRow( h, i_screen, h->cursor.i_row );
 605 }
 606 static void Eia608ParseChannel( eia608_t *h, const uint8_t d[2] )
 607 {
 608     /* Check odd parity */
 609     static const int p4[16] = {
 610         0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0
 611     };
 612     if( p4[d[0] & 0xf] == p4[d[0] >> 4] ||
 613         p4[d[1] & 0xf] == p4[ d[1] >> 4] )
 614     {
 615         h->i_channel = -1;
 616         return;
 617     }
 618
 619     /* */
 620     const int d1 = d[0] & 0x7f;
 621     if( d1 >= 0x10 && d1 <= 0x1f )
 622         h->i_channel = 1 + ((d1 & 0x08) != 0);
 623     else if( d1 < 0x10 )
 624         h->i_channel = 3;
 625 }
 626 static bool Eia608ParseTextAttribute( eia608_t *h, uint8_t d2 )
 627 {
 628     const int i_index = d2 - 0x20;
 629     assert( d2 >= 0x20 && d2 <= 0x2f );
 630
 631     h->color = pac2_attribs[i_index].i_color;
 632     h->font  = pac2_attribs[i_index].i_font;
 633     Eia608Cursor( h, 1 );
 634
 635     return false;
 636 }
 637 static bool Eia608ParseSingle( eia608_t *h, const uint8_t dx )
 638 {
 639     assert( dx >= 0x20 );
 640     Eia608Write( h, dx );
 641     return true;
 642 }
 643 static bool Eia608ParseDouble( eia608_t *h, uint8_t d2 )
 644 {
 645     assert( d2 >= 0x30 && d2 <= 0x3f );
 646     Eia608Write( h, d2 + 0x50 ); /* We use charaters 0x80...0x8f */
 647     return true;
 648 }
 649 static bool Eia608ParseExtended( eia608_t *h, uint8_t d1, uint8_t d2 )
 650 {
 651     assert( d2 >= 0x20 && d2 <= 0x3f );
 652     assert( d1 == 0x12 || d1 == 0x13 );
 653     if( d1 == 0x12 )
 654         d2 += 0x70; /* We use charaters 0x90-0xaf */
 655     else
 656         d2 += 0x90; /* We use charaters 0xb0-0xcf */
 657
 658     /* The extended characters replace the previous one with a more
 659      * advanced one */
 660     Eia608Cursor( h, -1 );
 661     Eia608Write( h, d2 );
 662     return true;
 663 }
 664 static bool Eia608ParseCommand0x14( eia608_t *h, uint8_t d2 )
 665 {
 666     bool b_changed = false;
 667
 668     switch( d2 )
 669     {
 670     case 0x20:  /* Resume caption loading */
 671         h->mode = EIA608_MODE_POPUP;
 672         break;
 673     case 0x21:  /* Backspace */
 674         Eia608Erase( h );
 675         b_changed = true;
 676         break;
 677     case 0x22:  /* Reserved */
 678     case 0x23:
 679         break;
 680     case 0x24:  /* Delete to end of row */
 681         Eia608EraseToEndOfRow( h );
 682         break;
 683     case 0x25:  /* Rollup 2 */
 684     case 0x26:  /* Rollup 3 */
 685     case 0x27:  /* Rollup 4 */
 686         if( h->mode == EIA608_MODE_POPUP || h->mode == EIA608_MODE_PAINTON )
 687         {
 688             Eia608EraseScreen( h, true );
 689             Eia608EraseScreen( h, false );
 690             b_changed = true;
 691         }
 692
 693         if( d2 == 0x25 )
 694             h->mode = EIA608_MODE_ROLLUP_2;
 695         else if( d2 == 0x26 )
 696             h->mode = EIA608_MODE_ROLLUP_3;
 697         else
 698             h->mode = EIA608_MODE_ROLLUP_4;
 699
 700         h->cursor.i_column = 0;
 701         h->cursor.i_row = h->i_row_rollup;
 702         break;
 703     case 0x28:  /* Flash on */
 704         /* TODO */
 705         break;
 706     case 0x29:  /* Resume direct captionning */
 707         h->mode = EIA608_MODE_PAINTON;
 708         break;
 709     case 0x2a:  /* Text restart */
 710         /* TODO */
 711         break;
 712
 713     case 0x2b: /* Resume text display */
 714         h->mode = EIA608_MODE_TEXT;
 715         break;
 716
 717     case 0x2c: /* Erase displayed memory */
 718         Eia608EraseScreen( h, true );
 719         b_changed = true;
 720         break;
 721     case 0x2d: /* Carriage return */
 722         Eia608RollUp(h);
 723         b_changed = true;
 724         break;
 725     case 0x2e: /* Erase non displayed memory */
 726         Eia608EraseScreen( h, false );
 727         break;
 728     case 0x2f: /* End of caption (flip screen if not paint on) */
 729         if( h->mode != EIA608_MODE_PAINTON )
 730             h->i_screen = 1 - h->i_screen;
 731         h->mode = EIA608_MODE_POPUP;
 732         h->cursor.i_column = 0;
 733         h->cursor.i_row = 0;
 734         h->color = EIA608_COLOR_DEFAULT;
 735         h->font = EIA608_FONT_REGULAR;
 736         b_changed = true;
 737         break;
 738     }
 739     return b_changed;
 740 }
 741 static bool Eia608ParseCommand0x17( eia608_t *h, uint8_t d2 )
 742 {
 743     switch( d2 )
 744     {
 745     case 0x21:  /* Tab offset 1 */
 746         Eia608Cursor( h, 1 );
 747         break;
 748     case 0x22:  /* Tab offset 2 */
 749         Eia608Cursor( h, 2 );
 750         break;
 751     case 0x23:  /* Tab offset 3 */
 752         Eia608Cursor( h, 3 );
 753         break;
 754     }
 755     return false;
 756 }
 757 static bool Eia608ParsePac( eia608_t *h, uint8_t d1, uint8_t d2 )
 758 {
 759     static const int pi_row[] = {
 760         11, -1, 1, 2, 3, 4, 12, 13, 14, 15, 5, 6, 7, 8, 9, 10
 761     };
 762     const int i_row_index = ( (d1<<1) & 0x0e) | ( (d2>>5) & 0x01 );
 763
 764     assert( d2 >= 0x40 && d2 <= 0x7f );
 765
 766     if( pi_row[i_row_index] <= 0 )
 767         return false;
 768
 769     /* Row */
 770     if( h->mode != EIA608_MODE_TEXT )
 771         h->cursor.i_row = pi_row[i_row_index] - 1;
 772     h->i_row_rollup = pi_row[i_row_index] - 1;
 773     /* Column */
 774     if( d2 >= 0x60 )
 775         d2 -= 0x60;
 776     else if( d2 >= 0x40 )
 777         d2 -= 0x40;
 778     h->cursor.i_column = pac2_attribs[d2].i_column;
 779     return false;
 780 }
 781
 782 static bool Eia608ParseData( eia608_t *h, uint8_t d1, uint8_t d2 )
 783 {
 784     bool b_changed = false;
 785
 786     if( d1 >= 0x18 && d1 <= 0x1f )
 787         d1 -= 8;
 788
 789 #define ON( d2min, d2max, cmd ) do { if( d2 >= d2min && d2 <= d2max ) b_changed = cmd; } while(0)
 790     switch( d1 )
 791     {
 792     case 0x11:
 793         ON( 0x20, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
 794         ON( 0x30, 0x3f, Eia608ParseDouble( h, d2 ) );
 795         break;
 796     case 0x12: case 0x13:
 797         ON( 0x20, 0x3f, Eia608ParseExtended( h, d1, d2 ) );
 798         break;
 799     case 0x14: case 0x15:
 800         ON( 0x20, 0x2f, Eia608ParseCommand0x14( h, d2 ) );
 801         break;
 802     case 0x17:
 803         ON( 0x21, 0x22, Eia608ParseCommand0x17( h, d2 ) );
 804         ON( 0x2e, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
 805         break;
 806     }
 807     if( d1 == 0x10 )
 808         ON( 0x40, 0x5f, Eia608ParsePac( h, d1, d2 ) );
 809     else if( d1 >= 0x11 && d1 <= 0x17 )
 810         ON( 0x40, 0x7f, Eia608ParsePac( h, d1, d2 ) );
 811 #undef ON
 812     if( d1 >= 0x20 )
 813     {
 814         b_changed = Eia608ParseSingle( h, d1 );
 815         if( d2 >= 0x20 )
 816             b_changed |= Eia608ParseSingle( h, d2 );
 817     }
 818     return b_changed;
 819 }
 820
 821 static void Eia608TextUtf8( char *psz_utf8, uint8_t c ) // Returns number of bytes used
 822 {
 823 #define E1(c,u) { c, { u, '\0' } }
 824 #define E2(c,u1,u2) { c, { u1, u2, '\0' } }
 825 #define E3(c,u1,u2,u3) { c, { u1, u2, u3, '\0' } }
 826     static const struct {
 827         uint8_t c;
 828         char utf8[3+1];
 829     } c2utf8[] = {
 830         // Regular line-21 character set, mostly ASCII except these exceptions
 831         E2( 0x2a, 0xc3,0xa1), // lowercase a, acute accent
 832         E2( 0x5c, 0xc3,0xa9), // lowercase e, acute accent
 833         E2( 0x5e, 0xc3,0xad), // lowercase i, acute accent
 834         E2( 0x5f, 0xc3,0xb3), // lowercase o, acute accent
 835         E2( 0x60, 0xc3,0xba), // lowercase u, acute accent
 836         E2( 0x7b, 0xc3,0xa7), // lowercase c with cedilla
 837         E2( 0x7c, 0xc3,0xb7), // division symbol
 838         E2( 0x7d, 0xc3,0x91), // uppercase N tilde
 839         E2( 0x7e, 0xc3,0xb1), // lowercase n tilde
 840         // THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
 841         // THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F
 842         E2( 0x80, 0xc2,0xae), // Registered symbol (R)
 843         E2( 0x81, 0xc2,0xb0), // degree sign
 844         E2( 0x82, 0xc2,0xbd), // 1/2 symbol
 845         E2( 0x83, 0xc2,0xbf), // Inverted (open) question mark
 846         E3( 0x84, 0xe2,0x84,0xa2), // Trademark symbol (TM)
 847         E2( 0x85, 0xc2,0xa2), // Cents symbol
 848         E2( 0x86, 0xc2,0xa3), // Pounds sterling
 849         E3( 0x87, 0xe2,0x99,0xaa), // Music note
 850         E2( 0x88, 0xc3,0xa0), // lowercase a, grave accent
 851         E1( 0x89, 0x20), // transparent space, we make it regular
 852         E2( 0x8a, 0xc3,0xa8), // lowercase e, grave accent
 853         E2( 0x8b, 0xc3,0xa2), // lowercase a, circumflex accent
 854         E2( 0x8c, 0xc3,0xaa), // lowercase e, circumflex accent
 855         E2( 0x8d, 0xc3,0xae), // lowercase i, circumflex accent
 856         E2( 0x8e, 0xc3,0xb4), // lowercase o, circumflex accent
 857         E2( 0x8f, 0xc3,0xbb), // lowercase u, circumflex accent
 858         // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
 859         // THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F
 860         E2( 0x90, 0xc3,0x81), // capital letter A with acute
 861         E2( 0x91, 0xc3,0x89), // capital letter E with acute
 862         E2( 0x92, 0xc3,0x93), // capital letter O with acute
 863         E2( 0x93, 0xc3,0x9a), // capital letter U with acute
 864         E2( 0x94, 0xc3,0x9c), // capital letter U with diaresis
 865         E2( 0x95, 0xc3,0xbc), // lowercase letter U with diaeresis
 866         E1( 0x96, 0x27), // apostrophe
 867         E2( 0x97, 0xc1,0xa1), // inverted exclamation mark
 868         E1( 0x98, 0x2a), // asterisk
 869         E1( 0x99, 0x27), // apostrophe (yes, duped). See CCADI source code.
 870         E1( 0x9a, 0x2d), // hyphen-minus
 871         E2( 0x9b, 0xc2,0xa9), // copyright sign
 872         E3( 0x9c, 0xe2,0x84,0xa0), // Service mark
 873         E1( 0x9d, 0x2e), // Full stop (.)
 874         E1( 0x9e, 0x22), // Quoatation mark
 875         E1( 0x9f, 0x22), // Quoatation mark
 876         E2( 0xa0, 0xc3,0x80), // uppercase A, grave accent
 877         E2( 0xa1, 0xc3,0x82), // uppercase A, circumflex
 878         E2( 0xa2, 0xc3,0x87), // uppercase C with cedilla
 879         E2( 0xa3, 0xc3,0x88), // uppercase E, grave accent
 880         E2( 0xa4, 0xc3,0x8a), // uppercase E, circumflex
 881         E2( 0xa5, 0xc3,0x8b), // capital letter E with diaresis
 882         E2( 0xa6, 0xc3,0xab), // lowercase letter e with diaresis
 883         E2( 0xa7, 0xc3,0x8e), // uppercase I, circumflex
 884         E2( 0xa8, 0xc3,0x8f), // uppercase I, with diaresis
 885         E2( 0xa9, 0xc3,0xaf), // lowercase i, with diaresis
 886         E2( 0xaa, 0xc3,0x94), // uppercase O, circumflex
 887         E2( 0xab, 0xc3,0x99), // uppercase U, grave accent
 888         E2( 0xac, 0xc3,0xb9), // lowercase u, grave accent
 889         E2( 0xad, 0xc3,0x9b), // uppercase U, circumflex
 890         E2( 0xae, 0xc2,0xab), // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
 891         E2( 0xaf, 0xc2,0xbb), // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
 892         // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
 893         // THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F
 894         E2( 0xb0, 0xc3,0x83), // Uppercase A, tilde
 895         E2( 0xb1, 0xc3,0xa3), // Lowercase a, tilde
 896         E2( 0xb2, 0xc3,0x8d), // Uppercase I, acute accent
 897         E2( 0xb3, 0xc3,0x8c), // Uppercase I, grave accent
 898         E2( 0xb4, 0xc3,0xac), // Lowercase i, grave accent
 899         E2( 0xb5, 0xc3,0x92), // Uppercase O, grave accent
 900         E2( 0xb6, 0xc3,0xb2), // Lowercase o, grave accent
 901         E2( 0xb7, 0xc3,0x95), // Uppercase O, tilde
 902         E2( 0xb8, 0xc3,0xb5), // Lowercase o, tilde
 903         E1( 0xb9, 0x7b), // Open curly brace
 904         E1( 0xba, 0x7d), // Closing curly brace
 905         E1( 0xbb, 0x5c), // Backslash
 906         E1( 0xbc, 0x5e), // Caret
 907         E1( 0xbd, 0x5f), // Underscore
 908         E2( 0xbe, 0xc2,0xa6), // Pipe (broken bar)
 909         E1( 0xbf, 0x7e), // Tilde (utf8 code unsure)
 910         E2( 0xc0, 0xc3,0x84), // Uppercase A, umlaut
 911         E2( 0xc1, 0xc3,0xa4), // Lowercase A, umlaut
 912         E2( 0xc2, 0xc3,0x96), // Uppercase O, umlaut
 913         E2( 0xc3, 0xc3,0xb6), // Lowercase o, umlaut
 914         E2( 0xc4, 0xc3,0x9f), // Esszett (sharp S)
 915         E2( 0xc5, 0xc2,0xa5), // Yen symbol
 916         E2( 0xc6, 0xc2,0xa4), // Currency symbol
 917         E1( 0xc7, 0x7c), // Vertical bar
 918         E2( 0xc8, 0xc3,0x85), // Uppercase A, ring
 919         E2( 0xc9, 0xc3,0xa5), // Lowercase A, ring
 920         E2( 0xca, 0xc3,0x98), // Uppercase O, slash
 921         E2( 0xcb, 0xc3,0xb8), // Lowercase o, slash
 922         E3( 0xcc, 0xe2,0x8c,0x9c), // Upper left corner
 923         E3( 0xcd, 0xe2,0x8c,0x9d), // Upper right corner
 924         E3( 0xce, 0xe2,0x8c,0x9e), // Lower left corner
 925         E3( 0xcf, 0xe2,0x8c,0x9f), // Lower right corner
 926
 927         E1(0,0)
 928     };
 929 #undef E3
 930 #undef E2
 931 #undef E1
 932
 933     static const int i_c2utf8 = sizeof(c2utf8)/sizeof(*c2utf8);
 934     int i;
 935
 936     for( i = 0; i < i_c2utf8; i++ )
 937     {
 938         if( c2utf8[i].c == c )
 939             break;
 940     }
 941     if( i >= i_c2utf8 )
 942     {
 943         psz_utf8[0] = c < 0x80 ? c : '?';   /* Normal : Unsupported */
 944         psz_utf8[1] = '\0';
 945     }
 946     else
 947     {
 948         strcpy( psz_utf8, c2utf8[i].utf8 );
 949     }
 950 }
 951
 952 static void Eia608Strlcat( char *d, const char *s, int i_max )
 953 {
 954     if( i_max > 1 )
 955         strncat( d, s, i_max-1 - strnlen(d, i_max-1));
 956     if( i_max > 0 )
 957         d[i_max-1] = '\0';
 958 }
 959
 960 static void Eia608TextLine( struct eia608_screen *screen, char *psz_text, int i_text_max, int i_row, bool b_html )
 961 {
 962     const uint8_t *p_char = screen->characters[i_row];
 963     const eia608_color_t *p_color = screen->colors[i_row];
 964     const eia608_font_t *p_font = screen->fonts[i_row];
 965     int i_start;
 966     int i_end;
 967     int x;
 968     eia608_color_t last_color = EIA608_COLOR_DEFAULT;
 969     bool     b_last_italics = false;
 970     bool     b_last_underline = false;
 971
 972     /* Search the start */
 973     i_start = 0;
 974     while( i_start < EIA608_SCREEN_COLUMNS-1 && p_char[i_start] == ' ' )
 975         i_start++;
 976
 977     /* Search the end */
 978     i_end = EIA608_SCREEN_COLUMNS-1;
 979     while( i_end > i_start && p_char[i_end] == ' ' )
 980         i_end--;
 981
 982     /* */
 983 #define CAT(t) Eia608Strlcat( psz_text, t, i_text_max )
 984     for( x = i_start; x <= i_end; x++ )
 985     {
 986         eia608_color_t color = p_color[x];
 987         bool b_italics = p_font[x] & EIA608_FONT_ITALICS;
 988         bool b_underline = p_font[x] & EIA608_FONT_UNDERLINE;
 989         char utf8[4];
 990
 991         /* */
 992         if( b_html )
 993         {
 994             bool b_close_color, b_close_italics, b_close_underline;
 995
 996             /* We create the tags font / i / u in that orders */
 997             b_close_color = color != last_color && last_color != EIA608_COLOR_DEFAULT;
 998             b_close_italics = !b_italics && b_last_italics;
 999             b_close_underline = !b_underline && b_last_underline;
1000
1001             /* Be sure to create valid html */
1002             b_close_italics |= b_last_italics && b_close_color;
1003             b_close_underline = b_last_underline && ( b_close_italics || b_close_color );
1004
1005             if( b_close_underline )
1006                 CAT( "</u>" );
1007             if( b_close_italics )
1008                 CAT( "</i>" );
1009             if( b_close_color )
1010                 CAT( "</font>" );
1011
1012             if( color != EIA608_COLOR_DEFAULT && color != last_color)
1013             {
1014                 static const char *ppsz_color[] = {
1015                     "#ffffff",  // white
1016                     "#00ff00",  // green
1017                     "#0000ff",  // blue
1018                     "#00ffff",  // cyan
1019                     "#ff0000",  // red
1020                     "#ffff00",  // yellow
1021                     "#ff00ff",  // magenta
1022                     "#ffffff",  // user defined XXX we use white
1023                 };
1024                 CAT( "<font color=" );
1025                 CAT( ppsz_color[color] );
1026                 CAT( ">" );
1027             }
1028             if( ( b_close_italics && b_italics ) || ( b_italics && !b_last_italics ) )
1029                 CAT( "<i>" );
1030             if( ( b_close_underline && b_underline ) || ( b_underline && !b_last_underline ) )
1031                 CAT( "<u>" );
1032         }
1033
1034         /* */
1035         Eia608TextUtf8( utf8, p_char[x] );
1036         CAT( utf8 );
1037
1038         /* */
1039         b_last_underline = b_underline;
1040         b_last_italics = b_italics;
1041         last_color = color;
1042     }
1043     if( b_html )
1044     {
1045         if( b_last_underline )
1046             CAT( "</u>" );
1047         if( b_last_italics )
1048             CAT( "</i>" );
1049         if( last_color != EIA608_COLOR_DEFAULT )
1050             CAT( "</font>" );
1051     }
1052 #undef CAT
1053 }
1054
1055 /* */
1056 static void Eia608Init( eia608_t *h )
1057 {
1058     memset( h, 0, sizeof(*h) );
1059
1060     /* */
1061     h->i_channel = -1;
1062
1063     h->i_screen = 0;
1064     Eia608ClearScreen( h, 0 );
1065     Eia608ClearScreen( h, 1 );
1066
1067     /* Cursor for writing text */
1068     h->cursor.i_column = 0;
1069     h->cursor.i_row = 0;
1070
1071     h->last.d1 = 0x00;
1072     h->last.d2 = 0x00;
1073     h->mode = EIA608_MODE_POPUP;
1074     h->color = EIA608_COLOR_DEFAULT;
1075     h->font = EIA608_FONT_REGULAR;
1076     h->i_row_rollup = EIA608_SCREEN_ROWS-1;
1077 }
1078 static bool Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] )
1079 {
1080     const uint8_t d1 = data[0] & 0x7f; /* Removed parity bit */
1081     const uint8_t d2 = data[1] & 0x7f;
1082     bool b_screen_changed = false;
1083
1084     if( d1 == 0 && d2 == 0 )
1085         return false;   /* Ignore padding (parity check are sometimes invalid on them) */
1086
1087     Eia608ParseChannel( h, data );
1088     if( h->i_channel != i_channel_selected )
1089         return false;
1090     //fprintf( stderr, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC %x %x\n", data[0], data[1] );
1091
1092     if( d1 >= 0x10 )
1093     {
1094         if( d1 >= 0x20 ||
1095             d1 != h->last.d1 || d2 != h->last.d2 ) /* Command codes can be repeated */
1096             b_screen_changed = Eia608ParseData( h, d1,d2 );
1097
1098         h->last.d1 = d1;
1099         h->last.d2 = d2;
1100     }
1101     else if( ( d1 >= 0x01 && d1 <= 0x0E ) || d1 == 0x0F )
1102     {
1103         /* XDS block / End of XDS block */
1104     }
1105     return b_screen_changed;
1106 }
1107
1108 static char *Eia608Text( eia608_t *h, bool b_html )
1109 {
1110     const int i_size = EIA608_SCREEN_ROWS * 3 * EIA608_SCREEN_COLUMNS+1;
1111     struct eia608_screen *screen = &h->screen[h->i_screen];
1112     bool b_first = true;
1113     char *psz;
1114     int i;
1115
1116     /* We allocate a buffer big enough for normal case */
1117     psz = malloc( i_size );
1118     if( !psz )
1119         return NULL;
1120     *psz = '\0';
1121     if( b_html )
1122         Eia608Strlcat( psz, "<text>", i_size );
1123     for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
1124     {
1125         if( !screen->row_used[i] )
1126             continue;
1127
1128         if( !b_first )
1129             Eia608Strlcat( psz, b_html ? "<br />" : "\n", i_size );
1130         b_first = false;
1131
1132         Eia608TextLine( screen, psz, i_size, i, b_html );
1133     }
1134     if( b_html )
1135         Eia608Strlcat( psz, "</text>", i_size );
1136     return psz;
1137 }
1138
1139 static void Eia608Exit( eia608_t *h )
1140 {
1141     VLC_UNUSED( h );
1142 }
1143