1 /*****************************************************************************
2 * cc608.c : CC 608/708 subtitles decoder
3 *****************************************************************************
4 * Copyright (C) 2007 Laurent Aimar
7 * Authors: Laurent Aimar < fenrir # via.ecp.fr>
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 /* The EIA 608 decoder part has been initialy based on ccextractor (GPL)
31 * On discontinuity reset the decoder state
42 #include <vlc_codec.h>
43 #include <vlc_input.h>
46 #include <vlc_filter.h>
47 #include <vlc_image.h>
48 #include <vlc_charset.h>
49 #include <vlc_stream.h>
54 #if !defined( strnlen )
55 #define strnlen vlc_strnlen
58 /*****************************************************************************
60 *****************************************************************************/
61 static int Open ( vlc_object_t * );
62 static void Close( vlc_object_t * );
65 set_shortname( _("CC 608/708"));
66 set_description( _("Closed Captions decoder") );
67 set_capability( "decoder", 50 );
68 set_callbacks( Open, Close );
71 /*****************************************************************************
73 *****************************************************************************/
76 EIA608_MODE_POPUP = 0,
77 EIA608_MODE_ROLLUP_2 = 1,
78 EIA608_MODE_ROLLUP_3 = 2,
79 EIA608_MODE_ROLLUP_4 = 3,
80 EIA608_MODE_PAINTON = 4,
86 EIA608_COLOR_WHITE = 0,
87 EIA608_COLOR_GREEN = 1,
88 EIA608_COLOR_BLUE = 2,
89 EIA608_COLOR_CYAN = 3,
91 EIA608_COLOR_YELLOW = 5,
92 EIA608_COLOR_MAGENTA = 6,
93 EIA608_COLOR_USERDEFINED = 7
98 EIA608_FONT_REGULAR = 0x00,
99 EIA608_FONT_ITALICS = 0x01,
100 EIA608_FONT_UNDERLINE = 0x02,
101 EIA608_FONT_UNDERLINE_ITALICS = EIA608_FONT_UNDERLINE | EIA608_FONT_ITALICS
104 #define EIA608_SCREEN_ROWS 15
105 #define EIA608_SCREEN_COLUMNS 32
107 struct eia608_screen // A CC buffer
109 uint8_t characters[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
110 eia608_color_t colors[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
111 eia608_font_t fonts[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1]; // Extra char at the end for a 0
112 int row_used[EIA608_SCREEN_ROWS]; // Any data in row?
114 typedef struct eia608_screen eia608_screen;
118 /* Current channel (used to reject packet without channel information) */
122 int i_screen; /* Displayed screen */
123 eia608_screen screen[2];
133 eia608_color_t color;
137 /* Last command pair (used to reject duplicated command) */
145 static void Eia608Init( eia608_t * );
146 static vlc_bool_t Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] );
147 static char *Eia608Text( eia608_t *h, vlc_bool_t b_html );
148 static void Eia608Exit( eia608_t * );
150 /* It will be enough up to 63 B frames, which is far too high for
151 * broadcast environment */
152 #define CC_MAX_REORDER_SIZE (64)
158 block_t *pp_block[CC_MAX_REORDER_SIZE];
166 static subpicture_t *Decode( decoder_t *, block_t ** );
168 /*****************************************************************************
169 * Open: probe the decoder and return score
170 *****************************************************************************
171 * Tries to launch a decoder and return score so that the interface is able
173 *****************************************************************************/
174 static int Open( vlc_object_t *p_this )
176 decoder_t *p_dec = (decoder_t*)p_this;
177 decoder_sys_t *p_sys;
181 switch( p_dec->fmt_in.i_codec )
183 case VLC_FOURCC('c','c','1',' '):
184 i_field = 0; i_channel = 1;
186 case VLC_FOURCC('c','c','2',' '):
187 i_field = 0; i_channel = 2;
189 case VLC_FOURCC('c','c','3',' '):
190 i_field = 1; i_channel = 1;
192 case VLC_FOURCC('c','c','4',' '):
193 i_field = 1; i_channel = 2;
200 p_dec->pf_decode_sub = Decode;
202 /* Allocate the memory needed to store the decoder's structure */
203 p_dec->p_sys = p_sys = malloc( sizeof( *p_sys ) );
206 msg_Err( p_dec, "out of memory" );
211 memset( p_sys, 0, sizeof( *p_sys ) );
214 p_sys->i_field = i_field;
215 p_sys->i_channel = i_channel;
217 Eia608Init( &p_sys->eia608 );
222 /****************************************************************************
223 * Decode: the whole thing
224 ****************************************************************************
226 ****************************************************************************/
227 static void Push( decoder_t *, block_t * );
228 static block_t *Pop( decoder_t * );
229 static subpicture_t *Convert( decoder_t *, block_t * );
231 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
233 decoder_sys_t *p_sys = p_dec->p_sys;
235 if( pp_block && *pp_block )
237 Push( p_dec, *pp_block );
243 block_t *p_block = Pop( p_dec );
247 subpicture_t *p_spu = Convert( p_dec, p_block );
254 /*****************************************************************************
255 * CloseDecoder: clean up the decoder
256 *****************************************************************************/
257 static void Close( vlc_object_t *p_this )
259 decoder_t *p_dec = (decoder_t *)p_this;
260 decoder_sys_t *p_sys = p_dec->p_sys;
263 for( i = 0; i < p_sys->i_block; i++ )
264 block_Release( p_sys->pp_block[i] );
265 Eia608Exit( &p_sys->eia608 );
269 /*****************************************************************************
271 *****************************************************************************/
272 static void Push( decoder_t *p_dec, block_t *p_block )
274 decoder_sys_t *p_sys = p_dec->p_sys;
276 if( p_sys->i_block >= CC_MAX_REORDER_SIZE )
278 msg_Warn( p_dec, "Trashing a CC entry" );
279 memmove( &p_sys->pp_block[0], &p_sys->pp_block[1], sizeof(*p_sys->pp_block) * (CC_MAX_REORDER_SIZE-1) );
282 p_sys->pp_block[p_sys->i_block++] = p_block;
284 static block_t *Pop( decoder_t *p_dec )
286 decoder_sys_t *p_sys = p_dec->p_sys;
290 /* XXX Cc captions data are OUT OF ORDER (because we receive them in the bitstream
291 * order (ie ordered by video picture dts) instead of the display order.
292 * We will simulate a simple IPB buffer scheme
293 * and reorder with pts.
294 * XXX it won't work with H264 which use non out of order B picture or MMCO
297 /* Wait for a P and output all *previous* picture by pts order (for
298 * hierarchical B frames) */
299 if( p_sys->i_block <= 1 ||
300 ( p_sys->pp_block[p_sys->i_block-1]->i_flags & BLOCK_FLAG_TYPE_B ) )
303 p_block = p_sys->pp_block[i_index = 0];
304 if( p_block->i_pts > 0 )
306 for( i = 1; i < p_sys->i_block-1; i++ )
308 if( p_sys->pp_block[i]->i_pts > 0 && p_block->i_pts > 0 &&
309 p_sys->pp_block[i]->i_pts < p_block->i_pts )
310 p_block = p_sys->pp_block[i_index = i];
313 assert( i_index+1 < p_sys->i_block );
314 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 ) );
320 static subpicture_t *Subtitle( decoder_t *p_dec, char *psz_subtitle, char *psz_html, mtime_t i_pts )
322 //decoder_sys_t *p_sys = p_dec->p_sys;
323 subpicture_t *p_spu = NULL;
326 /* We cannot display a subpicture with no date */
329 msg_Warn( p_dec, "subtitle without a date" );
333 EnsureUTF8( psz_subtitle );
335 EnsureUTF8( psz_html );
337 /* Create the subpicture unit */
338 p_spu = p_dec->pf_spu_buffer_new( p_dec );
341 msg_Warn( p_dec, "can't get spu buffer" );
342 free( psz_subtitle );
348 p_spu->b_pausable = VLC_TRUE;
350 /* Create a new subpicture region */
351 memset( &fmt, 0, sizeof(video_format_t) );
352 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
354 fmt.i_width = fmt.i_height = 0;
355 fmt.i_x_offset = fmt.i_y_offset = 0;
356 p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
357 if( !p_spu->p_region )
359 msg_Err( p_dec, "cannot allocate SPU region" );
360 free( psz_subtitle );
363 p_dec->pf_spu_buffer_del( p_dec, p_spu );
367 /* Decode and format the subpicture unit */
368 /* Normal text subs, easy markup */
369 p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM;// | SUBPICTURE_ALIGN_LEFT;// | p_sys->i_align;
370 p_spu->i_x = 0; //p_sys->i_align ? 20 : 0;
373 p_spu->p_region->psz_text = psz_subtitle;
374 p_spu->p_region->psz_html = psz_html;
376 p_spu->i_start = i_pts;
377 p_spu->i_stop = i_pts + 10000000; /* 10s max */
378 p_spu->b_ephemer = VLC_TRUE;
379 p_spu->b_absolute = VLC_FALSE;
384 static subpicture_t *Convert( decoder_t *p_dec, block_t *p_block )
386 decoder_sys_t *p_sys = p_dec->p_sys;
387 const int64_t i_pts = p_block->i_pts;
388 vlc_bool_t b_changed = VLC_FALSE;
390 /* TODO do the real decoding here */
391 while( p_block->i_buffer >= 3 )
393 if( p_block->p_buffer[0] == p_sys->i_field )
394 b_changed |= Eia608Parse( &p_sys->eia608, p_sys->i_channel, &p_block->p_buffer[1] );
396 p_block->i_buffer -= 3;
397 p_block->p_buffer += 3;
400 block_Release( p_block );
402 static int64_t i_last = 0;
403 if( b_changed )//&& i_pts - i_last > 100*1000 )
405 char *psz_subtitle = Eia608Text( &p_sys->eia608, VLC_FALSE );
406 char *psz_html = NULL;//Eia608Text( &p_sys->eia608, VLC_TRUE );
408 return Subtitle( p_dec, psz_subtitle, psz_html, i_pts );
414 /*****************************************************************************
416 *****************************************************************************/
417 static const struct {
418 eia608_color_t i_color;
419 eia608_font_t i_font;
422 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 },
423 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 },
424 { EIA608_COLOR_GREEN, EIA608_FONT_REGULAR, 0 },
425 { EIA608_COLOR_GREEN, EIA608_FONT_UNDERLINE, 0 },
426 { EIA608_COLOR_BLUE, EIA608_FONT_REGULAR, 0 },
427 { EIA608_COLOR_BLUE, EIA608_FONT_UNDERLINE, 0 },
428 { EIA608_COLOR_CYAN, EIA608_FONT_REGULAR, 0 },
429 { EIA608_COLOR_CYAN, EIA608_FONT_UNDERLINE, 0 },
430 { EIA608_COLOR_RED, EIA608_FONT_REGULAR, 0 },
431 { EIA608_COLOR_RED, EIA608_FONT_UNDERLINE, 0 },
432 { EIA608_COLOR_YELLOW, EIA608_FONT_REGULAR, 0 },
433 { EIA608_COLOR_YELLOW, EIA608_FONT_UNDERLINE, 0 },
434 { EIA608_COLOR_MAGENTA, EIA608_FONT_REGULAR, 0 },
435 { EIA608_COLOR_MAGENTA, EIA608_FONT_UNDERLINE, 0 },
436 { EIA608_COLOR_WHITE, EIA608_FONT_ITALICS, 0 },
437 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE_ITALICS, 0 },
439 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 },
440 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 },
441 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 4 },
442 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 4 },
443 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 8 },
444 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 8 },
445 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 12 },
446 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 12 },
447 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 16 },
448 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 16 },
449 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 20 },
450 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 20 },
451 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 24 },
452 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 24 },
453 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 28 },
454 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 28 } ,
457 #define EIA608_COLOR_DEFAULT EIA608_COLOR_WHITE
459 static void Eia608Cursor( eia608_t *h, int dx )
461 h->cursor.i_column += dx;
462 if( h->cursor.i_column < 0 )
463 h->cursor.i_column = 0;
464 else if( h->cursor.i_column > EIA608_SCREEN_COLUMNS-1 )
465 h->cursor.i_column = EIA608_SCREEN_COLUMNS-1;
467 static void Eia608ClearScreenRowX( eia608_t *h, int i_screen, int i_row, int x )
469 eia608_screen *screen = &h->screen[i_screen];
474 screen->row_used[i_row] = VLC_FALSE;
478 screen->row_used[i_row] = VLC_FALSE;
479 for( i = 0; i < x; i++ )
481 if( screen->characters[i_row][i] != ' ' ||
482 screen->colors[i_row][i] != EIA608_COLOR_DEFAULT ||
483 screen->fonts[i_row][i] != EIA608_FONT_REGULAR )
485 screen->row_used[i_row] = VLC_TRUE;
491 for( ; x < EIA608_SCREEN_COLUMNS+1; x++ )
493 screen->characters[i_row][x] = x < EIA608_SCREEN_COLUMNS ? ' ' : '\0';
494 screen->colors[i_row][x] = EIA608_COLOR_DEFAULT;
495 screen->fonts[i_row][x] = EIA608_FONT_REGULAR;
499 static void Eia608ClearScreenRow( eia608_t *h, int i_screen, int i_row )
501 Eia608ClearScreenRowX( h, i_screen, i_row, 0 );
504 static void Eia608ClearScreen( eia608_t *h, int i_screen )
507 for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
508 Eia608ClearScreenRow( h, i_screen, i );
511 static int Eia608GetWritingScreenIndex( eia608_t *h )
515 case EIA608_MODE_POPUP: // Non displayed screen
516 return 1 - h->i_screen;
518 case EIA608_MODE_ROLLUP_2: // Displayed screen
519 case EIA608_MODE_ROLLUP_3:
520 case EIA608_MODE_ROLLUP_4:
521 case EIA608_MODE_PAINTON:
524 /* It cannot happen, else it is a bug */
530 static void Eia608EraseScreen( eia608_t *h, vlc_bool_t b_displayed )
532 Eia608ClearScreen( h, b_displayed ? h->i_screen : (1-h->i_screen) );
535 static void Eia608Write( eia608_t *h, const uint8_t c )
537 const int i_row = h->cursor.i_row;
538 const int i_column = h->cursor.i_column;
539 eia608_screen *screen;
541 if( h->mode == EIA608_MODE_TEXT )
544 screen = &h->screen[Eia608GetWritingScreenIndex( h )];
546 screen->characters[i_row][i_column] = c;
547 screen->colors[i_row][i_column] = h->color;
548 screen->fonts[i_row][i_column] = h->font;
549 screen->row_used[i_row] = VLC_TRUE;
550 Eia608Cursor( h, 1 );
552 static void Eia608Erase( eia608_t *h )
554 const int i_row = h->cursor.i_row;
555 const int i_column = h->cursor.i_column - 1;
556 eia608_screen *screen;
558 if( h->mode == EIA608_MODE_TEXT )
563 screen = &h->screen[Eia608GetWritingScreenIndex( h )];
565 /* FIXME do we need to reset row_used/colors/font ? */
566 screen->characters[i_row][i_column] = ' ';
567 Eia608Cursor( h, -1 );
569 static void Eia608EraseToEndOfRow( eia608_t *h )
571 if( h->mode == EIA608_MODE_TEXT )
574 Eia608ClearScreenRowX( h, Eia608GetWritingScreenIndex( h ), h->cursor.i_row, h->cursor.i_column );
577 static void Eia608RollUp( eia608_t *h )
579 const int i_screen = Eia608GetWritingScreenIndex( h );
580 eia608_screen *screen = &h->screen[i_screen];
586 if( h->mode == EIA608_MODE_ROLLUP_2 )
588 else if( h->mode == EIA608_MODE_ROLLUP_3 )
590 else if( h->mode == EIA608_MODE_ROLLUP_4 )
595 /* Reset the cursor */
596 h->cursor.i_column = 0;
598 /* Erase lines above our window */
599 for( i = 0; i < h->cursor.i_row - keep_lines; i++ )
600 Eia608ClearScreenRow( h, i_screen, i );
603 for( i = 0; i < keep_lines-1; i++ )
605 const int i_row = h->cursor.i_row - keep_lines + i + 1;
608 assert( i_row+1 < EIA608_SCREEN_ROWS );
609 memcpy( screen->characters[i_row], screen->characters[i_row+1], sizeof(*screen->characters) );
610 memcpy( screen->colors[i_row], screen->colors[i_row+1], sizeof(*screen->colors) );
611 memcpy( screen->fonts[i_row], screen->fonts[i_row+1], sizeof(*screen->fonts) );
612 screen->row_used[i_row] = screen->row_used[i_row+1];
614 /* Reset current row */
615 Eia608ClearScreenRow( h, i_screen, h->cursor.i_row );
617 static void Eia608ParseChannel( eia608_t *h, uint8_t d1 )
621 else if( d1 == 0x1c )
623 else if( ( d1 >= 0x01 && d1 <= 0x0f ) || d1 == 0x15 )
625 else if( d1 == 0x1d )
628 static vlc_bool_t Eia608ParseTextAttribute( eia608_t *h, uint8_t d2 )
630 const int i_index = d2 - 0x20;
631 assert( d2 >= 0x20 && d2 <= 0x2f );
633 h->color = pac2_attribs[i_index].i_color;
634 h->font = pac2_attribs[i_index].i_font;
635 Eia608Cursor( h, 1 );
639 static vlc_bool_t Eia608ParseSingle( eia608_t *h, const uint8_t dx )
641 assert( dx >= 0x20 );
642 Eia608Write( h, dx );
645 static vlc_bool_t Eia608ParseDouble( eia608_t *h, uint8_t d2 )
647 assert( d2 >= 0x30 && d2 <= 0x3f );
648 Eia608Write( h, d2 + 0x50 ); /* We use charaters 0x80...0x8f */
651 static vlc_bool_t Eia608ParseExtended( eia608_t *h, uint8_t d1, uint8_t d2 )
653 assert( d2 >= 0x20 && d2 <= 0x3f );
654 assert( d1 == 0x12 || d1 == 0x13 );
656 d2 += 0x70; /* We use charaters 0x90-0xaf */
658 d2 += 0x90; /* We use charaters 0xb0-0xcf */
660 /* The extended characters replace the previous one with a more
662 Eia608Cursor( h, -1 );
663 Eia608Write( h, d2 );
666 static vlc_bool_t Eia608ParseCommand0x14( eia608_t *h, uint8_t d2 )
668 vlc_bool_t b_changed = VLC_FALSE;
672 case 0x20: /* Resume caption loading */
673 h->mode = EIA608_MODE_POPUP;
675 case 0x21: /* Backspace */
677 b_changed = VLC_TRUE;
679 case 0x22: /* Reserved */
682 case 0x24: /* Delete to end of row */
683 Eia608EraseToEndOfRow( h );
685 case 0x25: /* Rollup 2 */
686 case 0x26: /* Rollup 3 */
687 case 0x27: /* Rollup 4 */
688 if( h->mode == EIA608_MODE_POPUP || h->mode == EIA608_MODE_PAINTON )
690 Eia608EraseScreen( h, VLC_TRUE );
691 Eia608EraseScreen( h, VLC_FALSE );
692 b_changed = VLC_TRUE;
696 h->mode = EIA608_MODE_ROLLUP_2;
697 else if( d2 == 0x26 )
698 h->mode = EIA608_MODE_ROLLUP_3;
700 h->mode = EIA608_MODE_ROLLUP_4;
702 h->cursor.i_column = 0;
703 h->cursor.i_row = h->i_row_rollup;
705 case 0x28: /* Flash on */
708 case 0x29: /* Resume direct captionning */
709 h->mode = EIA608_MODE_PAINTON;
711 case 0x2a: /* Text restart */
715 case 0x2b: /* Resume text display */
716 h->mode = EIA608_MODE_TEXT;
719 case 0x2c: /* Erase displayed memory */
720 Eia608EraseScreen( h, VLC_TRUE );
721 b_changed = VLC_TRUE;
723 case 0x2d: /* Carriage return */
725 b_changed = VLC_TRUE;
727 case 0x2e: /* Erase non displayed memory */
728 Eia608EraseScreen( h, VLC_FALSE );
730 case 0x2f: /* End of caption (flip screen if not paint on) */
731 if( h->mode != EIA608_MODE_PAINTON )
732 h->i_screen = 1 - h->i_screen;
733 h->mode = EIA608_MODE_POPUP;
734 h->cursor.i_column = 0;
736 h->color = EIA608_COLOR_DEFAULT;
737 h->font = EIA608_FONT_REGULAR;
738 b_changed = VLC_TRUE;
743 static vlc_bool_t Eia608ParseCommand0x17( eia608_t *h, uint8_t d2 )
747 case 0x21: /* Tab offset 1 */
748 Eia608Cursor( h, 1 );
750 case 0x22: /* Tab offset 2 */
751 Eia608Cursor( h, 2 );
753 case 0x23: /* Tab offset 3 */
754 Eia608Cursor( h, 3 );
759 static vlc_bool_t Eia608ParsePac( eia608_t *h, uint8_t d1, uint8_t d2 )
761 static const int pi_row[] = {
762 11, -1, 1, 2, 3, 4, 12, 13, 14, 15, 5, 6, 7, 8, 9, 10
764 const int i_row_index = ( (d1<<1) & 0x0e) | ( (d2>>5) & 0x01 );
766 assert( d2 >= 0x40 && d2 <= 0x7f );
768 if( pi_row[i_row_index] <= 0 )
772 if( h->mode != EIA608_MODE_TEXT )
773 h->cursor.i_row = pi_row[i_row_index] - 1;
774 h->i_row_rollup = pi_row[i_row_index] - 1;
778 else if( d2 >= 0x40 )
780 h->cursor.i_column = pac2_attribs[d2].i_column;
784 static vlc_bool_t Eia608ParseData( eia608_t *h, uint8_t d1, uint8_t d2 )
786 vlc_bool_t b_changed = VLC_FALSE;
788 if( d1 >= 0x18 && d1 <= 0x1f )
791 #define ON( d2min, d2max, cmd ) do { if( d2 >= d2min && d2 <= d2max ) b_changed = cmd; } while(0)
795 ON( 0x20, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
796 ON( 0x30, 0x3f, Eia608ParseDouble( h, d2 ) );
798 case 0x12: case 0x13:
799 ON( 0x20, 0x3f, Eia608ParseExtended( h, d1, d2 ) );
801 case 0x14: case 0x15:
802 ON( 0x20, 0x2f, Eia608ParseCommand0x14( h, d2 ) );
805 ON( 0x21, 0x22, Eia608ParseCommand0x17( h, d2 ) );
806 ON( 0x2e, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
810 ON( 0x40, 0x5f, Eia608ParsePac( h, d1, d2 ) );
811 else if( d1 >= 0x11 && d1 <= 0x17 )
812 ON( 0x40, 0x7f, Eia608ParsePac( h, d1, d2 ) );
816 b_changed = Eia608ParseSingle( h, d1 );
818 b_changed |= Eia608ParseSingle( h, d2 );
823 static void Eia608TextUtf8( char *psz_utf8, uint8_t c ) // Returns number of bytes used
825 #define E1(c,u) { c, { u, '\0' } }
826 #define E2(c,u1,u2) { c, { u1, u2, '\0' } }
827 #define E3(c,u1,u2,u3) { c, { u1, u2, u3, '\0' } }
828 static const struct {
832 // Regular line-21 character set, mostly ASCII except these exceptions
833 E2( 0x2a, 0xc3,0xa1), // lowercase a, acute accent
834 E2( 0x5c, 0xc3,0xa9), // lowercase e, acute accent
835 E2( 0x5e, 0xc3,0xad), // lowercase i, acute accent
836 E2( 0x5f, 0xc3,0xb3), // lowercase o, acute accent
837 E2( 0x60, 0xc3,0xba), // lowercase u, acute accent
838 E2( 0x7b, 0xc3,0xa7), // lowercase c with cedilla
839 E2( 0x7c, 0xc3,0xb7), // division symbol
840 E2( 0x7d, 0xc3,0x91), // uppercase N tilde
841 E2( 0x7e, 0xc3,0xb1), // lowercase n tilde
842 // THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
843 // THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F
844 E2( 0x80, 0xc2,0xae), // Registered symbol (R)
845 E2( 0x81, 0xc2,0xb0), // degree sign
846 E2( 0x82, 0xc2,0xbd), // 1/2 symbol
847 E2( 0x83, 0xc2,0xbf), // Inverted (open) question mark
848 E3( 0x84, 0xe2,0x84,0xa2), // Trademark symbol (TM)
849 E2( 0x85, 0xc2,0xa2), // Cents symbol
850 E2( 0x86, 0xc2,0xa3), // Pounds sterling
851 E3( 0x87, 0xe2,0x99,0xaa), // Music note
852 E2( 0x88, 0xc3,0xa0), // lowercase a, grave accent
853 E1( 0x89, 0x20), // transparent space, we make it regular
854 E2( 0x8a, 0xc3,0xa8), // lowercase e, grave accent
855 E2( 0x8b, 0xc3,0xa2), // lowercase a, circumflex accent
856 E2( 0x8c, 0xc3,0xaa), // lowercase e, circumflex accent
857 E2( 0x8d, 0xc3,0xae), // lowercase i, circumflex accent
858 E2( 0x8e, 0xc3,0xb4), // lowercase o, circumflex accent
859 E2( 0x8f, 0xc3,0xbb), // lowercase u, circumflex accent
860 // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
861 // THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F
862 E2( 0x90, 0xc3,0x81), // capital letter A with acute
863 E2( 0x91, 0xc3,0x89), // capital letter E with acute
864 E2( 0x92, 0xc3,0x93), // capital letter O with acute
865 E2( 0x93, 0xc3,0x9a), // capital letter U with acute
866 E2( 0x94, 0xc3,0x9c), // capital letter U with diaresis
867 E2( 0x95, 0xc3,0xbc), // lowercase letter U with diaeresis
868 E1( 0x96, 0x27), // apostrophe
869 E2( 0x97, 0xc1,0xa1), // inverted exclamation mark
870 E1( 0x98, 0x2a), // asterisk
871 E1( 0x99, 0x27), // apostrophe (yes, duped). See CCADI source code.
872 E1( 0x9a, 0x2d), // hyphen-minus
873 E2( 0x9b, 0xc2,0xa9), // copyright sign
874 E3( 0x9c, 0xe2,0x84,0xa0), // Service mark
875 E1( 0x9d, 0x2e), // Full stop (.)
876 E1( 0x9e, 0x22), // Quoatation mark
877 E1( 0x9f, 0x22), // Quoatation mark
878 E2( 0xa0, 0xc3,0x80), // uppercase A, grave accent
879 E2( 0xa1, 0xc3,0x82), // uppercase A, circumflex
880 E2( 0xa2, 0xc3,0x87), // uppercase C with cedilla
881 E2( 0xa3, 0xc3,0x88), // uppercase E, grave accent
882 E2( 0xa4, 0xc3,0x8a), // uppercase E, circumflex
883 E2( 0xa5, 0xc3,0x8b), // capital letter E with diaresis
884 E2( 0xa6, 0xc3,0xab), // lowercase letter e with diaresis
885 E2( 0xa7, 0xc3,0x8e), // uppercase I, circumflex
886 E2( 0xa8, 0xc3,0x8f), // uppercase I, with diaresis
887 E2( 0xa9, 0xc3,0xaf), // lowercase i, with diaresis
888 E2( 0xaa, 0xc3,0x94), // uppercase O, circumflex
889 E2( 0xab, 0xc3,0x99), // uppercase U, grave accent
890 E2( 0xac, 0xc3,0xb9), // lowercase u, grave accent
891 E2( 0xad, 0xc3,0x9b), // uppercase U, circumflex
892 E2( 0xae, 0xc2,0xab), // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
893 E2( 0xaf, 0xc2,0xbb), // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
894 // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
895 // THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F
896 E2( 0xb0, 0xc3,0x83), // Uppercase A, tilde
897 E2( 0xb1, 0xc3,0xa3), // Lowercase a, tilde
898 E2( 0xb2, 0xc3,0x8d), // Uppercase I, acute accent
899 E2( 0xb3, 0xc3,0x8c), // Uppercase I, grave accent
900 E2( 0xb4, 0xc3,0xac), // Lowercase i, grave accent
901 E2( 0xb5, 0xc3,0x92), // Uppercase O, grave accent
902 E2( 0xb6, 0xc3,0xb2), // Lowercase o, grave accent
903 E2( 0xb7, 0xc3,0x95), // Uppercase O, tilde
904 E2( 0xb8, 0xc3,0xb5), // Lowercase o, tilde
905 E1( 0xb9, 0x7b), // Open curly brace
906 E1( 0xba, 0x7d), // Closing curly brace
907 E1( 0xbb, 0x5c), // Backslash
908 E1( 0xbc, 0x5e), // Caret
909 E1( 0xbd, 0x5f), // Underscore
910 E2( 0xbe, 0xc2,0xa6), // Pipe (broken bar)
911 E1( 0xbf, 0x7e), // Tilde (utf8 code unsure)
912 E2( 0xc0, 0xc3,0x84), // Uppercase A, umlaut
913 E2( 0xc1, 0xc3,0xa4), // Lowercase A, umlaut
914 E2( 0xc2, 0xc3,0x96), // Uppercase O, umlaut
915 E2( 0xc3, 0xc3,0xb6), // Lowercase o, umlaut
916 E2( 0xc4, 0xc3,0x9f), // Esszett (sharp S)
917 E2( 0xc5, 0xc2,0xa5), // Yen symbol
918 E2( 0xc6, 0xc2,0xa4), // Currency symbol
919 E1( 0xc7, 0x7c), // Vertical bar
920 E2( 0xc8, 0xc3,0x85), // Uppercase A, ring
921 E2( 0xc9, 0xc3,0xa5), // Lowercase A, ring
922 E2( 0xca, 0xc3,0x98), // Uppercase O, slash
923 E2( 0xcb, 0xc3,0xb8), // Lowercase o, slash
924 E3( 0xcc, 0xe2,0x8c,0x9c), // Upper left corner
925 E3( 0xcd, 0xe2,0x8c,0x9d), // Upper right corner
926 E3( 0xce, 0xe2,0x8c,0x9e), // Lower left corner
927 E3( 0xcf, 0xe2,0x8c,0x9f), // Lower right corner
935 static const int i_c2utf8 = sizeof(c2utf8)/sizeof(*c2utf8);
938 for( i = 0; i < i_c2utf8; i++ )
940 if( c2utf8[i].c == c )
945 psz_utf8[0] = c < 0x80 ? c : '?'; /* Normal : Unsupported */
950 strcpy( psz_utf8, c2utf8[i].utf8 );
954 static void Eia608Strlcat( char *d, const char *s, int i_max )
957 strncat( d, s, i_max-1 - strnlen(d, i_max-1));
962 static void Eia608TextLine( struct eia608_screen *screen, char *psz_text, int i_text_max, int i_row, vlc_bool_t b_html )
964 const uint8_t *p_char = screen->characters[i_row];
965 const eia608_color_t *p_color = screen->colors[i_row];
966 const eia608_font_t *p_font = screen->fonts[i_row];
970 eia608_color_t last_color = EIA608_COLOR_DEFAULT;
971 vlc_bool_t b_last_italics = VLC_FALSE;
972 vlc_bool_t b_last_underline = VLC_FALSE;
974 /* Search the start */
976 while( i_start < EIA608_SCREEN_COLUMNS-1 && p_char[i_start] == ' ' )
980 i_end = EIA608_SCREEN_COLUMNS-1;
981 while( i_end > i_start && p_char[i_end] == ' ' )
985 #define CAT(t) Eia608Strlcat( psz_text, t, i_text_max )
986 for( x = i_start; x <= i_end; x++ )
988 eia608_color_t color = p_color[x];
989 vlc_bool_t b_italics = p_font[x] & EIA608_FONT_ITALICS;
990 vlc_bool_t b_underline = p_font[x] & EIA608_FONT_UNDERLINE;
996 vlc_bool_t b_close_color, b_close_italics, b_close_underline;
998 /* We create the tags font / i / u in that orders */
999 b_close_color = color != last_color && last_color != EIA608_COLOR_DEFAULT;
1000 b_close_italics = !b_italics && b_last_italics;
1001 b_close_underline = !b_underline && b_last_underline;
1003 /* Be sure to create valid html */
1004 b_close_italics |= b_last_italics && b_close_color;
1005 b_close_underline = b_last_underline && ( b_close_italics || b_close_color );
1007 if( b_close_underline )
1009 if( b_close_italics )
1014 if( color != EIA608_COLOR_DEFAULT && color != last_color)
1016 static const char *ppsz_color[] = {
1022 "#ffff00", // yellow
1023 "#ff00ff", // magenta
1024 "#ffffff", // user defined XXX we use white
1026 CAT( "<font color=" );
1027 CAT( ppsz_color[color] );
1030 if( ( b_close_italics && b_italics ) || ( b_italics && !b_last_italics ) )
1032 if( ( b_close_underline && b_underline ) || ( b_underline && !b_last_underline ) )
1037 Eia608TextUtf8( utf8, p_char[x] );
1041 b_last_underline = b_underline;
1042 b_last_italics = b_italics;
1047 if( b_last_underline )
1049 if( b_last_italics )
1051 if( last_color != EIA608_COLOR_DEFAULT )
1058 static void Eia608Init( eia608_t *h )
1060 memset( h, 0, sizeof(*h) );
1066 Eia608ClearScreen( h, 0 );
1067 Eia608ClearScreen( h, 1 );
1069 /* Cursor for writing text */
1070 h->cursor.i_column = 0;
1071 h->cursor.i_row = 0;
1075 h->mode = EIA608_MODE_POPUP;
1076 h->color = EIA608_COLOR_DEFAULT;
1077 h->font = EIA608_FONT_REGULAR;
1078 h->i_row_rollup = EIA608_SCREEN_ROWS-1;
1080 static vlc_bool_t Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] )
1082 const uint8_t d1 = data[0] & 0x7f; /* Removed parity bit TODO we might want to check them */
1083 const uint8_t d2 = data[1] & 0x7f;
1084 vlc_bool_t b_screen_changed = VLC_FALSE;
1086 if( d1 == 0 && d2 == 0 )
1087 return VLC_FALSE; /* Ignore padding */
1089 Eia608ParseChannel( h, d1 );
1090 if( h->i_channel != i_channel_selected )
1092 //fprintf( stderr, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC %x %x\n", data[0], data[1] );
1097 d1 != h->last.d1 || d2 != h->last.d2 ) /* Command codes can be repeated */
1098 b_screen_changed = Eia608ParseData( h, d1,d2 );
1103 else if( ( d1 >= 0x01 && d1 <= 0x0E ) || d1 == 0x0F )
1105 /* XDS block / End of XDS block */
1107 return b_screen_changed;
1110 static char *Eia608Text( eia608_t *h, vlc_bool_t b_html )
1112 const int i_size = EIA608_SCREEN_ROWS * 3 * EIA608_SCREEN_COLUMNS+1;
1113 struct eia608_screen *screen = &h->screen[h->i_screen];
1114 vlc_bool_t b_first = VLC_TRUE;
1118 /* We allocate a buffer big enough for normal case */
1119 psz = malloc( i_size );
1122 Eia608Strlcat( psz, "<text>", i_size );
1123 for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
1125 if( !screen->row_used[i] )
1129 Eia608Strlcat( psz, b_html ? "<br />" : "\n", i_size );
1130 b_first = VLC_FALSE;
1132 Eia608TextLine( screen, psz, i_size, i, b_html );
1135 Eia608Strlcat( psz, "</text>", i_size );
1139 static void Eia608Exit( eia608_t *h )