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
40 #include <vlc_common.h>
41 #include <vlc_plugin.h>
42 #include <vlc_codec.h>
43 #include <vlc_input.h>
45 #include <vlc_filter.h>
46 #include <vlc_image.h>
47 #include <vlc_charset.h>
48 #include <vlc_stream.h>
56 /*****************************************************************************
58 *****************************************************************************/
59 static int Open ( vlc_object_t * );
60 static void Close( vlc_object_t * );
63 set_shortname( N_("CC 608/708"))
64 set_description( N_("Closed Captions decoder") )
65 set_capability( "decoder", 50 )
66 set_callbacks( Open, Close )
69 /*****************************************************************************
71 *****************************************************************************/
74 EIA608_MODE_POPUP = 0,
75 EIA608_MODE_ROLLUP_2 = 1,
76 EIA608_MODE_ROLLUP_3 = 2,
77 EIA608_MODE_ROLLUP_4 = 3,
78 EIA608_MODE_PAINTON = 4,
84 EIA608_COLOR_WHITE = 0,
85 EIA608_COLOR_GREEN = 1,
86 EIA608_COLOR_BLUE = 2,
87 EIA608_COLOR_CYAN = 3,
89 EIA608_COLOR_YELLOW = 5,
90 EIA608_COLOR_MAGENTA = 6,
91 EIA608_COLOR_USERDEFINED = 7
96 EIA608_FONT_REGULAR = 0x00,
97 EIA608_FONT_ITALICS = 0x01,
98 EIA608_FONT_UNDERLINE = 0x02,
99 EIA608_FONT_UNDERLINE_ITALICS = EIA608_FONT_UNDERLINE | EIA608_FONT_ITALICS
102 #define EIA608_SCREEN_ROWS 15
103 #define EIA608_SCREEN_COLUMNS 32
105 struct eia608_screen // A CC buffer
107 uint8_t characters[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
108 eia608_color_t colors[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
109 eia608_font_t fonts[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1]; // Extra char at the end for a 0
110 int row_used[EIA608_SCREEN_ROWS]; // Any data in row?
112 typedef struct eia608_screen eia608_screen;
116 /* Current channel (used to reject packet without channel information) */
120 int i_screen; /* Displayed screen */
121 eia608_screen screen[2];
131 eia608_color_t color;
135 /* Last command pair (used to reject duplicated command) */
143 static void Eia608Init( eia608_t * );
144 static bool Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] );
145 static char *Eia608Text( eia608_t *h, bool b_html );
146 static void Eia608Exit( eia608_t * );
148 /* It will be enough up to 63 B frames, which is far too high for
149 * broadcast environment */
150 #define CC_MAX_REORDER_SIZE (64)
156 block_t *pp_block[CC_MAX_REORDER_SIZE];
164 static subpicture_t *Decode( decoder_t *, block_t ** );
166 /*****************************************************************************
167 * Open: probe the decoder and return score
168 *****************************************************************************
169 * Tries to launch a decoder and return score so that the interface is able
171 *****************************************************************************/
172 static int Open( vlc_object_t *p_this )
174 decoder_t *p_dec = (decoder_t*)p_this;
175 decoder_sys_t *p_sys;
179 switch( p_dec->fmt_in.i_codec )
181 case VLC_FOURCC('c','c','1',' '):
182 i_field = 0; i_channel = 1;
184 case VLC_FOURCC('c','c','2',' '):
185 i_field = 0; i_channel = 2;
187 case VLC_FOURCC('c','c','3',' '):
188 i_field = 1; i_channel = 1;
190 case VLC_FOURCC('c','c','4',' '):
191 i_field = 1; i_channel = 2;
198 p_dec->pf_decode_sub = Decode;
200 /* Allocate the memory needed to store the decoder's structure */
201 p_dec->p_sys = p_sys = calloc( 1, sizeof( *p_sys ) );
206 p_sys->i_field = i_field;
207 p_sys->i_channel = i_channel;
209 Eia608Init( &p_sys->eia608 );
211 p_dec->fmt_out.i_cat = SPU_ES;
212 p_dec->fmt_out.i_codec = VLC_CODEC_TEXT;
217 /****************************************************************************
218 * Decode: the whole thing
219 ****************************************************************************
221 ****************************************************************************/
222 static void Push( decoder_t *, block_t * );
223 static block_t *Pop( decoder_t * );
224 static subpicture_t *Convert( decoder_t *, block_t * );
226 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
228 if( pp_block && *pp_block )
230 Push( p_dec, *pp_block );
236 block_t *p_block = Pop( p_dec );
240 subpicture_t *p_spu = Convert( p_dec, p_block );
247 /*****************************************************************************
248 * CloseDecoder: clean up the decoder
249 *****************************************************************************/
250 static void Close( vlc_object_t *p_this )
252 decoder_t *p_dec = (decoder_t *)p_this;
253 decoder_sys_t *p_sys = p_dec->p_sys;
256 for( i = 0; i < p_sys->i_block; i++ )
257 block_Release( p_sys->pp_block[i] );
258 Eia608Exit( &p_sys->eia608 );
262 /*****************************************************************************
264 *****************************************************************************/
265 static void Push( decoder_t *p_dec, block_t *p_block )
267 decoder_sys_t *p_sys = p_dec->p_sys;
269 if( p_sys->i_block >= CC_MAX_REORDER_SIZE )
271 msg_Warn( p_dec, "Trashing a CC entry" );
272 memmove( &p_sys->pp_block[0], &p_sys->pp_block[1], sizeof(*p_sys->pp_block) * (CC_MAX_REORDER_SIZE-1) );
275 p_sys->pp_block[p_sys->i_block++] = p_block;
277 static block_t *Pop( decoder_t *p_dec )
279 decoder_sys_t *p_sys = p_dec->p_sys;
283 /* XXX Cc captions data are OUT OF ORDER (because we receive them in the bitstream
284 * order (ie ordered by video picture dts) instead of the display order.
285 * We will simulate a simple IPB buffer scheme
286 * and reorder with pts.
287 * XXX it won't work with H264 which use non out of order B picture or MMCO
290 /* Wait for a P and output all *previous* picture by pts order (for
291 * hierarchical B frames) */
292 if( p_sys->i_block <= 1 ||
293 ( p_sys->pp_block[p_sys->i_block-1]->i_flags & BLOCK_FLAG_TYPE_B ) )
296 p_block = p_sys->pp_block[i_index = 0];
297 if( p_block->i_pts > VLC_TS_INVALID )
299 for( i = 1; i < p_sys->i_block-1; i++ )
301 if( p_sys->pp_block[i]->i_pts > VLC_TS_INVALID && p_block->i_pts > VLC_TS_INVALID &&
302 p_sys->pp_block[i]->i_pts < p_block->i_pts )
303 p_block = p_sys->pp_block[i_index = i];
306 assert( i_index+1 < p_sys->i_block );
307 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 ) );
313 static subpicture_t *Subtitle( decoder_t *p_dec, char *psz_subtitle, char *psz_html, mtime_t i_pts )
315 //decoder_sys_t *p_sys = p_dec->p_sys;
316 subpicture_t *p_spu = NULL;
318 /* We cannot display a subpicture with no date */
319 if( i_pts <= VLC_TS_INVALID )
321 msg_Warn( p_dec, "subtitle without a date" );
325 EnsureUTF8( psz_subtitle );
327 EnsureUTF8( psz_html );
329 /* Create the subpicture unit */
330 p_spu = decoder_NewSubpictureText( p_dec );
333 free( psz_subtitle );
337 p_spu->i_start = i_pts;
338 p_spu->i_stop = i_pts + 10000000; /* 10s max */
339 p_spu->b_ephemer = true;
340 p_spu->b_absolute = false;
342 subpicture_updater_sys_t *p_spu_sys = p_spu->updater.p_sys;
344 p_spu_sys->align = SUBPICTURE_ALIGN_BOTTOM;
345 p_spu_sys->text = psz_subtitle;
346 p_spu_sys->html = psz_html;
351 static subpicture_t *Convert( decoder_t *p_dec, block_t *p_block )
355 decoder_sys_t *p_sys = p_dec->p_sys;
356 const int64_t i_pts = p_block->i_pts;
357 bool b_changed = false;
359 /* TODO do the real decoding here */
360 while( p_block->i_buffer >= 3 )
362 if( p_block->p_buffer[0] == p_sys->i_field )
363 b_changed |= Eia608Parse( &p_sys->eia608, p_sys->i_channel, &p_block->p_buffer[1] );
365 p_block->i_buffer -= 3;
366 p_block->p_buffer += 3;
369 block_Release( p_block );
373 char *psz_subtitle = Eia608Text( &p_sys->eia608, false );
374 char *psz_html = NULL;//Eia608Text( &p_sys->eia608, true );
375 return Subtitle( p_dec, psz_subtitle, psz_html, i_pts );
381 /*****************************************************************************
383 *****************************************************************************/
384 static const struct {
385 eia608_color_t i_color;
386 eia608_font_t i_font;
389 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 },
390 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 },
391 { EIA608_COLOR_GREEN, EIA608_FONT_REGULAR, 0 },
392 { EIA608_COLOR_GREEN, EIA608_FONT_UNDERLINE, 0 },
393 { EIA608_COLOR_BLUE, EIA608_FONT_REGULAR, 0 },
394 { EIA608_COLOR_BLUE, EIA608_FONT_UNDERLINE, 0 },
395 { EIA608_COLOR_CYAN, EIA608_FONT_REGULAR, 0 },
396 { EIA608_COLOR_CYAN, EIA608_FONT_UNDERLINE, 0 },
397 { EIA608_COLOR_RED, EIA608_FONT_REGULAR, 0 },
398 { EIA608_COLOR_RED, EIA608_FONT_UNDERLINE, 0 },
399 { EIA608_COLOR_YELLOW, EIA608_FONT_REGULAR, 0 },
400 { EIA608_COLOR_YELLOW, EIA608_FONT_UNDERLINE, 0 },
401 { EIA608_COLOR_MAGENTA, EIA608_FONT_REGULAR, 0 },
402 { EIA608_COLOR_MAGENTA, EIA608_FONT_UNDERLINE, 0 },
403 { EIA608_COLOR_WHITE, EIA608_FONT_ITALICS, 0 },
404 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE_ITALICS, 0 },
406 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 },
407 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 },
408 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 4 },
409 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 4 },
410 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 8 },
411 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 8 },
412 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 12 },
413 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 12 },
414 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 16 },
415 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 16 },
416 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 20 },
417 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 20 },
418 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 24 },
419 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 24 },
420 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 28 },
421 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 28 } ,
424 #define EIA608_COLOR_DEFAULT EIA608_COLOR_WHITE
426 static void Eia608Cursor( eia608_t *h, int dx )
428 h->cursor.i_column += dx;
429 if( h->cursor.i_column < 0 )
430 h->cursor.i_column = 0;
431 else if( h->cursor.i_column > EIA608_SCREEN_COLUMNS-1 )
432 h->cursor.i_column = EIA608_SCREEN_COLUMNS-1;
434 static void Eia608ClearScreenRowX( eia608_t *h, int i_screen, int i_row, int x )
436 eia608_screen *screen = &h->screen[i_screen];
441 screen->row_used[i_row] = false;
445 screen->row_used[i_row] = false;
446 for( i = 0; i < x; i++ )
448 if( screen->characters[i_row][i] != ' ' ||
449 screen->colors[i_row][i] != EIA608_COLOR_DEFAULT ||
450 screen->fonts[i_row][i] != EIA608_FONT_REGULAR )
452 screen->row_used[i_row] = true;
458 for( ; x < EIA608_SCREEN_COLUMNS+1; x++ )
460 screen->characters[i_row][x] = x < EIA608_SCREEN_COLUMNS ? ' ' : '\0';
461 screen->colors[i_row][x] = EIA608_COLOR_DEFAULT;
462 screen->fonts[i_row][x] = EIA608_FONT_REGULAR;
466 static void Eia608ClearScreenRow( eia608_t *h, int i_screen, int i_row )
468 Eia608ClearScreenRowX( h, i_screen, i_row, 0 );
471 static void Eia608ClearScreen( eia608_t *h, int i_screen )
474 for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
475 Eia608ClearScreenRow( h, i_screen, i );
478 static int Eia608GetWritingScreenIndex( eia608_t *h )
482 case EIA608_MODE_POPUP: // Non displayed screen
483 return 1 - h->i_screen;
485 case EIA608_MODE_ROLLUP_2: // Displayed screen
486 case EIA608_MODE_ROLLUP_3:
487 case EIA608_MODE_ROLLUP_4:
488 case EIA608_MODE_PAINTON:
491 /* It cannot happen, else it is a bug */
497 static void Eia608EraseScreen( eia608_t *h, bool b_displayed )
499 Eia608ClearScreen( h, b_displayed ? h->i_screen : (1-h->i_screen) );
502 static void Eia608Write( eia608_t *h, const uint8_t c )
504 const int i_row = h->cursor.i_row;
505 const int i_column = h->cursor.i_column;
506 eia608_screen *screen;
508 if( h->mode == EIA608_MODE_TEXT )
511 screen = &h->screen[Eia608GetWritingScreenIndex( h )];
513 screen->characters[i_row][i_column] = c;
514 screen->colors[i_row][i_column] = h->color;
515 screen->fonts[i_row][i_column] = h->font;
516 screen->row_used[i_row] = true;
517 Eia608Cursor( h, 1 );
519 static void Eia608Erase( eia608_t *h )
521 const int i_row = h->cursor.i_row;
522 const int i_column = h->cursor.i_column - 1;
523 eia608_screen *screen;
525 if( h->mode == EIA608_MODE_TEXT )
530 screen = &h->screen[Eia608GetWritingScreenIndex( h )];
532 /* FIXME do we need to reset row_used/colors/font ? */
533 screen->characters[i_row][i_column] = ' ';
534 Eia608Cursor( h, -1 );
536 static void Eia608EraseToEndOfRow( eia608_t *h )
538 if( h->mode == EIA608_MODE_TEXT )
541 Eia608ClearScreenRowX( h, Eia608GetWritingScreenIndex( h ), h->cursor.i_row, h->cursor.i_column );
544 static void Eia608RollUp( eia608_t *h )
546 if( h->mode == EIA608_MODE_TEXT )
549 const int i_screen = Eia608GetWritingScreenIndex( h );
550 eia608_screen *screen = &h->screen[i_screen];
556 if( h->mode == EIA608_MODE_ROLLUP_2 )
558 else if( h->mode == EIA608_MODE_ROLLUP_3 )
560 else if( h->mode == EIA608_MODE_ROLLUP_4 )
565 /* Reset the cursor */
566 h->cursor.i_column = 0;
568 /* Erase lines above our window */
569 for( i = 0; i < h->cursor.i_row - keep_lines; i++ )
570 Eia608ClearScreenRow( h, i_screen, i );
573 for( i = 0; i < keep_lines-1; i++ )
575 const int i_row = h->cursor.i_row - keep_lines + i + 1;
578 assert( i_row+1 < EIA608_SCREEN_ROWS );
579 memcpy( screen->characters[i_row], screen->characters[i_row+1], sizeof(*screen->characters) );
580 memcpy( screen->colors[i_row], screen->colors[i_row+1], sizeof(*screen->colors) );
581 memcpy( screen->fonts[i_row], screen->fonts[i_row+1], sizeof(*screen->fonts) );
582 screen->row_used[i_row] = screen->row_used[i_row+1];
584 /* Reset current row */
585 Eia608ClearScreenRow( h, i_screen, h->cursor.i_row );
587 static void Eia608ParseChannel( eia608_t *h, const uint8_t d[2] )
589 /* Check odd parity */
590 static const int p4[16] = {
591 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0
593 if( p4[d[0] & 0xf] == p4[d[0] >> 4] ||
594 p4[d[1] & 0xf] == p4[ d[1] >> 4] )
601 const int d1 = d[0] & 0x7f;
602 if( d1 >= 0x10 && d1 <= 0x1f )
603 h->i_channel = 1 + ((d1 & 0x08) != 0);
607 static bool Eia608ParseTextAttribute( eia608_t *h, uint8_t d2 )
609 const int i_index = d2 - 0x20;
610 assert( d2 >= 0x20 && d2 <= 0x2f );
612 h->color = pac2_attribs[i_index].i_color;
613 h->font = pac2_attribs[i_index].i_font;
614 Eia608Cursor( h, 1 );
618 static bool Eia608ParseSingle( eia608_t *h, const uint8_t dx )
620 assert( dx >= 0x20 );
621 Eia608Write( h, dx );
624 static bool Eia608ParseDouble( eia608_t *h, uint8_t d2 )
626 assert( d2 >= 0x30 && d2 <= 0x3f );
627 Eia608Write( h, d2 + 0x50 ); /* We use charaters 0x80...0x8f */
630 static bool Eia608ParseExtended( eia608_t *h, uint8_t d1, uint8_t d2 )
632 assert( d2 >= 0x20 && d2 <= 0x3f );
633 assert( d1 == 0x12 || d1 == 0x13 );
635 d2 += 0x70; /* We use charaters 0x90-0xaf */
637 d2 += 0x90; /* We use charaters 0xb0-0xcf */
639 /* The extended characters replace the previous one with a more
641 Eia608Cursor( h, -1 );
642 Eia608Write( h, d2 );
645 static bool Eia608ParseCommand0x14( eia608_t *h, uint8_t d2 )
647 bool b_changed = false;
651 case 0x20: /* Resume caption loading */
652 h->mode = EIA608_MODE_POPUP;
654 case 0x21: /* Backspace */
658 case 0x22: /* Reserved */
661 case 0x24: /* Delete to end of row */
662 Eia608EraseToEndOfRow( h );
664 case 0x25: /* Rollup 2 */
665 case 0x26: /* Rollup 3 */
666 case 0x27: /* Rollup 4 */
667 if( h->mode == EIA608_MODE_POPUP || h->mode == EIA608_MODE_PAINTON )
669 Eia608EraseScreen( h, true );
670 Eia608EraseScreen( h, false );
675 h->mode = EIA608_MODE_ROLLUP_2;
676 else if( d2 == 0x26 )
677 h->mode = EIA608_MODE_ROLLUP_3;
679 h->mode = EIA608_MODE_ROLLUP_4;
681 h->cursor.i_column = 0;
682 h->cursor.i_row = h->i_row_rollup;
684 case 0x28: /* Flash on */
687 case 0x29: /* Resume direct captionning */
688 h->mode = EIA608_MODE_PAINTON;
690 case 0x2a: /* Text restart */
694 case 0x2b: /* Resume text display */
695 h->mode = EIA608_MODE_TEXT;
698 case 0x2c: /* Erase displayed memory */
699 Eia608EraseScreen( h, true );
702 case 0x2d: /* Carriage return */
706 case 0x2e: /* Erase non displayed memory */
707 Eia608EraseScreen( h, false );
709 case 0x2f: /* End of caption (flip screen if not paint on) */
710 if( h->mode != EIA608_MODE_PAINTON )
711 h->i_screen = 1 - h->i_screen;
712 h->mode = EIA608_MODE_POPUP;
713 h->cursor.i_column = 0;
715 h->color = EIA608_COLOR_DEFAULT;
716 h->font = EIA608_FONT_REGULAR;
722 static bool Eia608ParseCommand0x17( eia608_t *h, uint8_t d2 )
726 case 0x21: /* Tab offset 1 */
727 Eia608Cursor( h, 1 );
729 case 0x22: /* Tab offset 2 */
730 Eia608Cursor( h, 2 );
732 case 0x23: /* Tab offset 3 */
733 Eia608Cursor( h, 3 );
738 static bool Eia608ParsePac( eia608_t *h, uint8_t d1, uint8_t d2 )
740 static const int pi_row[] = {
741 11, -1, 1, 2, 3, 4, 12, 13, 14, 15, 5, 6, 7, 8, 9, 10
743 const int i_row_index = ( (d1<<1) & 0x0e) | ( (d2>>5) & 0x01 );
745 assert( d2 >= 0x40 && d2 <= 0x7f );
747 if( pi_row[i_row_index] <= 0 )
751 if( h->mode != EIA608_MODE_TEXT )
752 h->cursor.i_row = pi_row[i_row_index] - 1;
753 h->i_row_rollup = pi_row[i_row_index] - 1;
757 else if( d2 >= 0x40 )
759 h->cursor.i_column = pac2_attribs[d2].i_column;
763 static bool Eia608ParseData( eia608_t *h, uint8_t d1, uint8_t d2 )
765 bool b_changed = false;
767 if( d1 >= 0x18 && d1 <= 0x1f )
770 #define ON( d2min, d2max, cmd ) do { if( d2 >= d2min && d2 <= d2max ) b_changed = cmd; } while(0)
774 ON( 0x20, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
775 ON( 0x30, 0x3f, Eia608ParseDouble( h, d2 ) );
777 case 0x12: case 0x13:
778 ON( 0x20, 0x3f, Eia608ParseExtended( h, d1, d2 ) );
780 case 0x14: case 0x15:
781 ON( 0x20, 0x2f, Eia608ParseCommand0x14( h, d2 ) );
784 ON( 0x21, 0x22, Eia608ParseCommand0x17( h, d2 ) );
785 ON( 0x2e, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
789 ON( 0x40, 0x5f, Eia608ParsePac( h, d1, d2 ) );
790 else if( d1 >= 0x11 && d1 <= 0x17 )
791 ON( 0x40, 0x7f, Eia608ParsePac( h, d1, d2 ) );
795 b_changed = Eia608ParseSingle( h, d1 );
797 b_changed |= Eia608ParseSingle( h, d2 );
802 static void Eia608TextUtf8( char *psz_utf8, uint8_t c ) // Returns number of bytes used
804 #define E1(c,u) { c, { u, '\0' } }
805 #define E2(c,u1,u2) { c, { u1, u2, '\0' } }
806 #define E3(c,u1,u2,u3) { c, { u1, u2, u3, '\0' } }
807 static const struct {
811 // Regular line-21 character set, mostly ASCII except these exceptions
812 E2( 0x2a, 0xc3,0xa1), // lowercase a, acute accent
813 E2( 0x5c, 0xc3,0xa9), // lowercase e, acute accent
814 E2( 0x5e, 0xc3,0xad), // lowercase i, acute accent
815 E2( 0x5f, 0xc3,0xb3), // lowercase o, acute accent
816 E2( 0x60, 0xc3,0xba), // lowercase u, acute accent
817 E2( 0x7b, 0xc3,0xa7), // lowercase c with cedilla
818 E2( 0x7c, 0xc3,0xb7), // division symbol
819 E2( 0x7d, 0xc3,0x91), // uppercase N tilde
820 E2( 0x7e, 0xc3,0xb1), // lowercase n tilde
821 // THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
822 // THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F
823 E2( 0x80, 0xc2,0xae), // Registered symbol (R)
824 E2( 0x81, 0xc2,0xb0), // degree sign
825 E2( 0x82, 0xc2,0xbd), // 1/2 symbol
826 E2( 0x83, 0xc2,0xbf), // Inverted (open) question mark
827 E3( 0x84, 0xe2,0x84,0xa2), // Trademark symbol (TM)
828 E2( 0x85, 0xc2,0xa2), // Cents symbol
829 E2( 0x86, 0xc2,0xa3), // Pounds sterling
830 E3( 0x87, 0xe2,0x99,0xaa), // Music note
831 E2( 0x88, 0xc3,0xa0), // lowercase a, grave accent
832 E1( 0x89, 0x20), // transparent space, we make it regular
833 E2( 0x8a, 0xc3,0xa8), // lowercase e, grave accent
834 E2( 0x8b, 0xc3,0xa2), // lowercase a, circumflex accent
835 E2( 0x8c, 0xc3,0xaa), // lowercase e, circumflex accent
836 E2( 0x8d, 0xc3,0xae), // lowercase i, circumflex accent
837 E2( 0x8e, 0xc3,0xb4), // lowercase o, circumflex accent
838 E2( 0x8f, 0xc3,0xbb), // lowercase u, circumflex accent
839 // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
840 // THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F
841 E2( 0x90, 0xc3,0x81), // capital letter A with acute
842 E2( 0x91, 0xc3,0x89), // capital letter E with acute
843 E2( 0x92, 0xc3,0x93), // capital letter O with acute
844 E2( 0x93, 0xc3,0x9a), // capital letter U with acute
845 E2( 0x94, 0xc3,0x9c), // capital letter U with diaresis
846 E2( 0x95, 0xc3,0xbc), // lowercase letter U with diaeresis
847 E1( 0x96, 0x27), // apostrophe
848 E2( 0x97, 0xc1,0xa1), // inverted exclamation mark
849 E1( 0x98, 0x2a), // asterisk
850 E1( 0x99, 0x27), // apostrophe (yes, duped). See CCADI source code.
851 E1( 0x9a, 0x2d), // hyphen-minus
852 E2( 0x9b, 0xc2,0xa9), // copyright sign
853 E3( 0x9c, 0xe2,0x84,0xa0), // Service mark
854 E1( 0x9d, 0x2e), // Full stop (.)
855 E1( 0x9e, 0x22), // Quoatation mark
856 E1( 0x9f, 0x22), // Quoatation mark
857 E2( 0xa0, 0xc3,0x80), // uppercase A, grave accent
858 E2( 0xa1, 0xc3,0x82), // uppercase A, circumflex
859 E2( 0xa2, 0xc3,0x87), // uppercase C with cedilla
860 E2( 0xa3, 0xc3,0x88), // uppercase E, grave accent
861 E2( 0xa4, 0xc3,0x8a), // uppercase E, circumflex
862 E2( 0xa5, 0xc3,0x8b), // capital letter E with diaresis
863 E2( 0xa6, 0xc3,0xab), // lowercase letter e with diaresis
864 E2( 0xa7, 0xc3,0x8e), // uppercase I, circumflex
865 E2( 0xa8, 0xc3,0x8f), // uppercase I, with diaresis
866 E2( 0xa9, 0xc3,0xaf), // lowercase i, with diaresis
867 E2( 0xaa, 0xc3,0x94), // uppercase O, circumflex
868 E2( 0xab, 0xc3,0x99), // uppercase U, grave accent
869 E2( 0xac, 0xc3,0xb9), // lowercase u, grave accent
870 E2( 0xad, 0xc3,0x9b), // uppercase U, circumflex
871 E2( 0xae, 0xc2,0xab), // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
872 E2( 0xaf, 0xc2,0xbb), // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
873 // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
874 // THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F
875 E2( 0xb0, 0xc3,0x83), // Uppercase A, tilde
876 E2( 0xb1, 0xc3,0xa3), // Lowercase a, tilde
877 E2( 0xb2, 0xc3,0x8d), // Uppercase I, acute accent
878 E2( 0xb3, 0xc3,0x8c), // Uppercase I, grave accent
879 E2( 0xb4, 0xc3,0xac), // Lowercase i, grave accent
880 E2( 0xb5, 0xc3,0x92), // Uppercase O, grave accent
881 E2( 0xb6, 0xc3,0xb2), // Lowercase o, grave accent
882 E2( 0xb7, 0xc3,0x95), // Uppercase O, tilde
883 E2( 0xb8, 0xc3,0xb5), // Lowercase o, tilde
884 E1( 0xb9, 0x7b), // Open curly brace
885 E1( 0xba, 0x7d), // Closing curly brace
886 E1( 0xbb, 0x5c), // Backslash
887 E1( 0xbc, 0x5e), // Caret
888 E1( 0xbd, 0x5f), // Underscore
889 E2( 0xbe, 0xc2,0xa6), // Pipe (broken bar)
890 E1( 0xbf, 0x7e), // Tilde (utf8 code unsure)
891 E2( 0xc0, 0xc3,0x84), // Uppercase A, umlaut
892 E2( 0xc1, 0xc3,0xa4), // Lowercase A, umlaut
893 E2( 0xc2, 0xc3,0x96), // Uppercase O, umlaut
894 E2( 0xc3, 0xc3,0xb6), // Lowercase o, umlaut
895 E2( 0xc4, 0xc3,0x9f), // Esszett (sharp S)
896 E2( 0xc5, 0xc2,0xa5), // Yen symbol
897 E2( 0xc6, 0xc2,0xa4), // Currency symbol
898 E1( 0xc7, 0x7c), // Vertical bar
899 E2( 0xc8, 0xc3,0x85), // Uppercase A, ring
900 E2( 0xc9, 0xc3,0xa5), // Lowercase A, ring
901 E2( 0xca, 0xc3,0x98), // Uppercase O, slash
902 E2( 0xcb, 0xc3,0xb8), // Lowercase o, slash
903 E3( 0xcc, 0xe2,0x8c,0x9c), // Upper left corner
904 E3( 0xcd, 0xe2,0x8c,0x9d), // Upper right corner
905 E3( 0xce, 0xe2,0x8c,0x9e), // Lower left corner
906 E3( 0xcf, 0xe2,0x8c,0x9f), // Lower right corner
914 static const int i_c2utf8 = sizeof(c2utf8)/sizeof(*c2utf8);
917 for( i = 0; i < i_c2utf8; i++ )
919 if( c2utf8[i].c == c )
924 psz_utf8[0] = c < 0x80 ? c : '?'; /* Normal : Unsupported */
929 strcpy( psz_utf8, c2utf8[i].utf8 );
933 static void Eia608Strlcat( char *d, const char *s, int i_max )
936 strncat( d, s, i_max-1 - strnlen(d, i_max-1));
941 static void Eia608TextLine( struct eia608_screen *screen, char *psz_text, int i_text_max, int i_row, bool b_html )
943 const uint8_t *p_char = screen->characters[i_row];
944 const eia608_color_t *p_color = screen->colors[i_row];
945 const eia608_font_t *p_font = screen->fonts[i_row];
949 eia608_color_t last_color = EIA608_COLOR_DEFAULT;
950 bool b_last_italics = false;
951 bool b_last_underline = false;
953 /* Search the start */
955 while( i_start < EIA608_SCREEN_COLUMNS-1 && p_char[i_start] == ' ' )
959 i_end = EIA608_SCREEN_COLUMNS-1;
960 while( i_end > i_start && p_char[i_end] == ' ' )
964 #define CAT(t) Eia608Strlcat( psz_text, t, i_text_max )
965 for( x = i_start; x <= i_end; x++ )
967 eia608_color_t color = p_color[x];
968 bool b_italics = p_font[x] & EIA608_FONT_ITALICS;
969 bool b_underline = p_font[x] & EIA608_FONT_UNDERLINE;
975 bool b_close_color, b_close_italics, b_close_underline;
977 /* We create the tags font / i / u in that orders */
978 b_close_color = color != last_color && last_color != EIA608_COLOR_DEFAULT;
979 b_close_italics = !b_italics && b_last_italics;
980 b_close_underline = !b_underline && b_last_underline;
982 /* Be sure to create valid html */
983 b_close_italics |= b_last_italics && b_close_color;
984 b_close_underline = b_last_underline && ( b_close_italics || b_close_color );
986 if( b_close_underline )
988 if( b_close_italics )
993 if( color != EIA608_COLOR_DEFAULT && color != last_color)
995 static const char *ppsz_color[] = {
1001 "#ffff00", // yellow
1002 "#ff00ff", // magenta
1003 "#ffffff", // user defined XXX we use white
1005 CAT( "<font color=" );
1006 CAT( ppsz_color[color] );
1009 if( ( b_close_italics && b_italics ) || ( b_italics && !b_last_italics ) )
1011 if( ( b_close_underline && b_underline ) || ( b_underline && !b_last_underline ) )
1016 Eia608TextUtf8( utf8, p_char[x] );
1020 b_last_underline = b_underline;
1021 b_last_italics = b_italics;
1026 if( b_last_underline )
1028 if( b_last_italics )
1030 if( last_color != EIA608_COLOR_DEFAULT )
1037 static void Eia608Init( eia608_t *h )
1039 memset( h, 0, sizeof(*h) );
1045 Eia608ClearScreen( h, 0 );
1046 Eia608ClearScreen( h, 1 );
1048 /* Cursor for writing text */
1049 h->cursor.i_column = 0;
1050 h->cursor.i_row = 0;
1054 h->mode = EIA608_MODE_POPUP;
1055 h->color = EIA608_COLOR_DEFAULT;
1056 h->font = EIA608_FONT_REGULAR;
1057 h->i_row_rollup = EIA608_SCREEN_ROWS-1;
1059 static bool Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] )
1061 const uint8_t d1 = data[0] & 0x7f; /* Removed parity bit */
1062 const uint8_t d2 = data[1] & 0x7f;
1063 bool b_screen_changed = false;
1065 if( d1 == 0 && d2 == 0 )
1066 return false; /* Ignore padding (parity check are sometimes invalid on them) */
1068 Eia608ParseChannel( h, data );
1069 if( h->i_channel != i_channel_selected )
1071 //fprintf( stderr, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC %x %x\n", data[0], data[1] );
1076 d1 != h->last.d1 || d2 != h->last.d2 ) /* Command codes can be repeated */
1077 b_screen_changed = Eia608ParseData( h, d1,d2 );
1082 else if( ( d1 >= 0x01 && d1 <= 0x0E ) || d1 == 0x0F )
1084 /* XDS block / End of XDS block */
1086 return b_screen_changed;
1089 static char *Eia608Text( eia608_t *h, bool b_html )
1091 const int i_size = EIA608_SCREEN_ROWS * 3 * EIA608_SCREEN_COLUMNS+1;
1092 struct eia608_screen *screen = &h->screen[h->i_screen];
1093 bool b_first = true;
1097 /* We allocate a buffer big enough for normal case */
1098 psz = malloc( i_size );
1103 Eia608Strlcat( psz, "<text>", i_size );
1104 for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
1106 if( !screen->row_used[i] )
1110 Eia608Strlcat( psz, b_html ? "<br />" : "\n", i_size );
1113 Eia608TextLine( screen, psz, i_size, i, b_html );
1116 Eia608Strlcat( psz, "</text>", i_size );
1120 static void Eia608Exit( eia608_t *h )