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>
43 #include <vlc_codec.h>
44 #include <vlc_input.h>
47 #include <vlc_filter.h>
48 #include <vlc_image.h>
49 #include <vlc_charset.h>
50 #include <vlc_stream.h>
57 /*****************************************************************************
59 *****************************************************************************/
60 static int Open ( vlc_object_t * );
61 static void Close( vlc_object_t * );
64 set_shortname( N_("CC 608/708"))
65 set_description( N_("Closed Captions decoder") )
66 set_capability( "decoder", 50 )
67 set_callbacks( Open, Close )
70 /*****************************************************************************
72 *****************************************************************************/
75 EIA608_MODE_POPUP = 0,
76 EIA608_MODE_ROLLUP_2 = 1,
77 EIA608_MODE_ROLLUP_3 = 2,
78 EIA608_MODE_ROLLUP_4 = 3,
79 EIA608_MODE_PAINTON = 4,
85 EIA608_COLOR_WHITE = 0,
86 EIA608_COLOR_GREEN = 1,
87 EIA608_COLOR_BLUE = 2,
88 EIA608_COLOR_CYAN = 3,
90 EIA608_COLOR_YELLOW = 5,
91 EIA608_COLOR_MAGENTA = 6,
92 EIA608_COLOR_USERDEFINED = 7
97 EIA608_FONT_REGULAR = 0x00,
98 EIA608_FONT_ITALICS = 0x01,
99 EIA608_FONT_UNDERLINE = 0x02,
100 EIA608_FONT_UNDERLINE_ITALICS = EIA608_FONT_UNDERLINE | EIA608_FONT_ITALICS
103 #define EIA608_SCREEN_ROWS 15
104 #define EIA608_SCREEN_COLUMNS 32
106 struct eia608_screen // A CC buffer
108 uint8_t characters[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
109 eia608_color_t colors[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1];
110 eia608_font_t fonts[EIA608_SCREEN_ROWS][EIA608_SCREEN_COLUMNS+1]; // Extra char at the end for a 0
111 int row_used[EIA608_SCREEN_ROWS]; // Any data in row?
113 typedef struct eia608_screen eia608_screen;
117 /* Current channel (used to reject packet without channel information) */
121 int i_screen; /* Displayed screen */
122 eia608_screen screen[2];
132 eia608_color_t color;
136 /* Last command pair (used to reject duplicated command) */
144 static void Eia608Init( eia608_t * );
145 static bool Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] );
146 static char *Eia608Text( eia608_t *h, bool b_html );
147 static void Eia608Exit( eia608_t * );
149 /* It will be enough up to 63 B frames, which is far too high for
150 * broadcast environment */
151 #define CC_MAX_REORDER_SIZE (64)
157 block_t *pp_block[CC_MAX_REORDER_SIZE];
165 static subpicture_t *Decode( decoder_t *, block_t ** );
167 /*****************************************************************************
168 * Open: probe the decoder and return score
169 *****************************************************************************
170 * Tries to launch a decoder and return score so that the interface is able
172 *****************************************************************************/
173 static int Open( vlc_object_t *p_this )
175 decoder_t *p_dec = (decoder_t*)p_this;
176 decoder_sys_t *p_sys;
180 switch( p_dec->fmt_in.i_codec )
182 case VLC_FOURCC('c','c','1',' '):
183 i_field = 0; i_channel = 1;
185 case VLC_FOURCC('c','c','2',' '):
186 i_field = 0; i_channel = 2;
188 case VLC_FOURCC('c','c','3',' '):
189 i_field = 1; i_channel = 1;
191 case VLC_FOURCC('c','c','4',' '):
192 i_field = 1; i_channel = 2;
199 p_dec->pf_decode_sub = Decode;
201 /* Allocate the memory needed to store the decoder's structure */
202 p_dec->p_sys = p_sys = calloc( 1, sizeof( *p_sys ) );
207 p_sys->i_field = i_field;
208 p_sys->i_channel = i_channel;
210 Eia608Init( &p_sys->eia608 );
212 p_dec->fmt_out.i_cat = SPU_ES;
213 p_dec->fmt_out.i_codec = VLC_FOURCC('T','E','X','T');
218 /****************************************************************************
219 * Decode: the whole thing
220 ****************************************************************************
222 ****************************************************************************/
223 static void Push( decoder_t *, block_t * );
224 static block_t *Pop( decoder_t * );
225 static subpicture_t *Convert( decoder_t *, block_t * );
227 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
229 if( pp_block && *pp_block )
231 Push( p_dec, *pp_block );
237 block_t *p_block = Pop( p_dec );
241 subpicture_t *p_spu = Convert( p_dec, p_block );
248 /*****************************************************************************
249 * CloseDecoder: clean up the decoder
250 *****************************************************************************/
251 static void Close( vlc_object_t *p_this )
253 decoder_t *p_dec = (decoder_t *)p_this;
254 decoder_sys_t *p_sys = p_dec->p_sys;
257 for( i = 0; i < p_sys->i_block; i++ )
258 block_Release( p_sys->pp_block[i] );
259 Eia608Exit( &p_sys->eia608 );
263 /*****************************************************************************
265 *****************************************************************************/
266 static void Push( decoder_t *p_dec, block_t *p_block )
268 decoder_sys_t *p_sys = p_dec->p_sys;
270 if( p_sys->i_block >= CC_MAX_REORDER_SIZE )
272 msg_Warn( p_dec, "Trashing a CC entry" );
273 memmove( &p_sys->pp_block[0], &p_sys->pp_block[1], sizeof(*p_sys->pp_block) * (CC_MAX_REORDER_SIZE-1) );
276 p_sys->pp_block[p_sys->i_block++] = p_block;
278 static block_t *Pop( decoder_t *p_dec )
280 decoder_sys_t *p_sys = p_dec->p_sys;
284 /* XXX Cc captions data are OUT OF ORDER (because we receive them in the bitstream
285 * order (ie ordered by video picture dts) instead of the display order.
286 * We will simulate a simple IPB buffer scheme
287 * and reorder with pts.
288 * XXX it won't work with H264 which use non out of order B picture or MMCO
291 /* Wait for a P and output all *previous* picture by pts order (for
292 * hierarchical B frames) */
293 if( p_sys->i_block <= 1 ||
294 ( p_sys->pp_block[p_sys->i_block-1]->i_flags & BLOCK_FLAG_TYPE_B ) )
297 p_block = p_sys->pp_block[i_index = 0];
298 if( p_block->i_pts > 0 )
300 for( i = 1; i < p_sys->i_block-1; i++ )
302 if( p_sys->pp_block[i]->i_pts > 0 && p_block->i_pts > 0 &&
303 p_sys->pp_block[i]->i_pts < p_block->i_pts )
304 p_block = p_sys->pp_block[i_index = i];
307 assert( i_index+1 < p_sys->i_block );
308 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 ) );
314 static subpicture_t *Subtitle( decoder_t *p_dec, char *psz_subtitle, char *psz_html, mtime_t i_pts )
316 //decoder_sys_t *p_sys = p_dec->p_sys;
317 subpicture_t *p_spu = NULL;
320 /* We cannot display a subpicture with no date */
323 msg_Warn( p_dec, "subtitle without a date" );
327 EnsureUTF8( psz_subtitle );
329 EnsureUTF8( psz_html );
331 /* Create the subpicture unit */
332 p_spu = decoder_NewSubpicture( p_dec );
335 msg_Warn( p_dec, "can't get spu buffer" );
336 free( psz_subtitle );
341 /* Create a new subpicture region */
342 memset( &fmt, 0, sizeof(video_format_t) );
343 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
345 fmt.i_width = fmt.i_height = 0;
346 fmt.i_x_offset = fmt.i_y_offset = 0;
347 p_spu->p_region = subpicture_region_New( &fmt );
348 if( !p_spu->p_region )
350 msg_Err( p_dec, "cannot allocate SPU region" );
351 free( psz_subtitle );
353 decoder_DeleteSubpicture( p_dec, p_spu );
357 /* Decode and format the subpicture unit */
358 /* Normal text subs, easy markup */
359 p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM;// | SUBPICTURE_ALIGN_LEFT;// | p_sys->i_align;
360 p_spu->p_region->i_x = 0; //p_sys->i_align ? 20 : 0;
361 p_spu->p_region->i_y = 10;
363 p_spu->p_region->psz_text = psz_subtitle;
364 p_spu->p_region->psz_html = psz_html;
366 p_spu->i_start = i_pts;
367 p_spu->i_stop = i_pts + 10000000; /* 10s max */
368 p_spu->b_ephemer = true;
369 p_spu->b_absolute = false;
374 static subpicture_t *Convert( decoder_t *p_dec, block_t *p_block )
378 decoder_sys_t *p_sys = p_dec->p_sys;
379 const int64_t i_pts = p_block->i_pts;
380 bool b_changed = false;
382 /* TODO do the real decoding here */
383 while( p_block->i_buffer >= 3 )
385 if( p_block->p_buffer[0] == p_sys->i_field )
386 b_changed |= Eia608Parse( &p_sys->eia608, p_sys->i_channel, &p_block->p_buffer[1] );
388 p_block->i_buffer -= 3;
389 p_block->p_buffer += 3;
392 block_Release( p_block );
396 char *psz_subtitle = Eia608Text( &p_sys->eia608, false );
397 char *psz_html = NULL;//Eia608Text( &p_sys->eia608, true );
398 return Subtitle( p_dec, psz_subtitle, psz_html, i_pts );
404 /*****************************************************************************
406 *****************************************************************************/
407 static const struct {
408 eia608_color_t i_color;
409 eia608_font_t i_font;
412 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 },
413 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 },
414 { EIA608_COLOR_GREEN, EIA608_FONT_REGULAR, 0 },
415 { EIA608_COLOR_GREEN, EIA608_FONT_UNDERLINE, 0 },
416 { EIA608_COLOR_BLUE, EIA608_FONT_REGULAR, 0 },
417 { EIA608_COLOR_BLUE, EIA608_FONT_UNDERLINE, 0 },
418 { EIA608_COLOR_CYAN, EIA608_FONT_REGULAR, 0 },
419 { EIA608_COLOR_CYAN, EIA608_FONT_UNDERLINE, 0 },
420 { EIA608_COLOR_RED, EIA608_FONT_REGULAR, 0 },
421 { EIA608_COLOR_RED, EIA608_FONT_UNDERLINE, 0 },
422 { EIA608_COLOR_YELLOW, EIA608_FONT_REGULAR, 0 },
423 { EIA608_COLOR_YELLOW, EIA608_FONT_UNDERLINE, 0 },
424 { EIA608_COLOR_MAGENTA, EIA608_FONT_REGULAR, 0 },
425 { EIA608_COLOR_MAGENTA, EIA608_FONT_UNDERLINE, 0 },
426 { EIA608_COLOR_WHITE, EIA608_FONT_ITALICS, 0 },
427 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE_ITALICS, 0 },
429 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 0 },
430 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 0 },
431 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 4 },
432 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 4 },
433 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 8 },
434 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 8 },
435 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 12 },
436 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 12 },
437 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 16 },
438 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 16 },
439 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 20 },
440 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 20 },
441 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 24 },
442 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 24 },
443 { EIA608_COLOR_WHITE, EIA608_FONT_REGULAR, 28 },
444 { EIA608_COLOR_WHITE, EIA608_FONT_UNDERLINE, 28 } ,
447 #define EIA608_COLOR_DEFAULT EIA608_COLOR_WHITE
449 static void Eia608Cursor( eia608_t *h, int dx )
451 h->cursor.i_column += dx;
452 if( h->cursor.i_column < 0 )
453 h->cursor.i_column = 0;
454 else if( h->cursor.i_column > EIA608_SCREEN_COLUMNS-1 )
455 h->cursor.i_column = EIA608_SCREEN_COLUMNS-1;
457 static void Eia608ClearScreenRowX( eia608_t *h, int i_screen, int i_row, int x )
459 eia608_screen *screen = &h->screen[i_screen];
464 screen->row_used[i_row] = false;
468 screen->row_used[i_row] = false;
469 for( i = 0; i < x; i++ )
471 if( screen->characters[i_row][i] != ' ' ||
472 screen->colors[i_row][i] != EIA608_COLOR_DEFAULT ||
473 screen->fonts[i_row][i] != EIA608_FONT_REGULAR )
475 screen->row_used[i_row] = true;
481 for( ; x < EIA608_SCREEN_COLUMNS+1; x++ )
483 screen->characters[i_row][x] = x < EIA608_SCREEN_COLUMNS ? ' ' : '\0';
484 screen->colors[i_row][x] = EIA608_COLOR_DEFAULT;
485 screen->fonts[i_row][x] = EIA608_FONT_REGULAR;
489 static void Eia608ClearScreenRow( eia608_t *h, int i_screen, int i_row )
491 Eia608ClearScreenRowX( h, i_screen, i_row, 0 );
494 static void Eia608ClearScreen( eia608_t *h, int i_screen )
497 for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
498 Eia608ClearScreenRow( h, i_screen, i );
501 static int Eia608GetWritingScreenIndex( eia608_t *h )
505 case EIA608_MODE_POPUP: // Non displayed screen
506 return 1 - h->i_screen;
508 case EIA608_MODE_ROLLUP_2: // Displayed screen
509 case EIA608_MODE_ROLLUP_3:
510 case EIA608_MODE_ROLLUP_4:
511 case EIA608_MODE_PAINTON:
514 /* It cannot happen, else it is a bug */
520 static void Eia608EraseScreen( eia608_t *h, bool b_displayed )
522 Eia608ClearScreen( h, b_displayed ? h->i_screen : (1-h->i_screen) );
525 static void Eia608Write( eia608_t *h, const uint8_t c )
527 const int i_row = h->cursor.i_row;
528 const int i_column = h->cursor.i_column;
529 eia608_screen *screen;
531 if( h->mode == EIA608_MODE_TEXT )
534 screen = &h->screen[Eia608GetWritingScreenIndex( h )];
536 screen->characters[i_row][i_column] = c;
537 screen->colors[i_row][i_column] = h->color;
538 screen->fonts[i_row][i_column] = h->font;
539 screen->row_used[i_row] = true;
540 Eia608Cursor( h, 1 );
542 static void Eia608Erase( eia608_t *h )
544 const int i_row = h->cursor.i_row;
545 const int i_column = h->cursor.i_column - 1;
546 eia608_screen *screen;
548 if( h->mode == EIA608_MODE_TEXT )
553 screen = &h->screen[Eia608GetWritingScreenIndex( h )];
555 /* FIXME do we need to reset row_used/colors/font ? */
556 screen->characters[i_row][i_column] = ' ';
557 Eia608Cursor( h, -1 );
559 static void Eia608EraseToEndOfRow( eia608_t *h )
561 if( h->mode == EIA608_MODE_TEXT )
564 Eia608ClearScreenRowX( h, Eia608GetWritingScreenIndex( h ), h->cursor.i_row, h->cursor.i_column );
567 static void Eia608RollUp( eia608_t *h )
569 const int i_screen = Eia608GetWritingScreenIndex( h );
570 eia608_screen *screen = &h->screen[i_screen];
576 if( h->mode == EIA608_MODE_ROLLUP_2 )
578 else if( h->mode == EIA608_MODE_ROLLUP_3 )
580 else if( h->mode == EIA608_MODE_ROLLUP_4 )
585 /* Reset the cursor */
586 h->cursor.i_column = 0;
588 /* Erase lines above our window */
589 for( i = 0; i < h->cursor.i_row - keep_lines; i++ )
590 Eia608ClearScreenRow( h, i_screen, i );
593 for( i = 0; i < keep_lines-1; i++ )
595 const int i_row = h->cursor.i_row - keep_lines + i + 1;
598 assert( i_row+1 < EIA608_SCREEN_ROWS );
599 memcpy( screen->characters[i_row], screen->characters[i_row+1], sizeof(*screen->characters) );
600 memcpy( screen->colors[i_row], screen->colors[i_row+1], sizeof(*screen->colors) );
601 memcpy( screen->fonts[i_row], screen->fonts[i_row+1], sizeof(*screen->fonts) );
602 screen->row_used[i_row] = screen->row_used[i_row+1];
604 /* Reset current row */
605 Eia608ClearScreenRow( h, i_screen, h->cursor.i_row );
607 static void Eia608ParseChannel( eia608_t *h, uint8_t d[2] )
609 /* Check odd parity */
610 static const int p4[16] = {
611 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0
613 if( p4[d[0] & 0xf] == p4[d[0] >> 4] ||
614 p4[d[1] & 0xf] == p4[ d[1] >> 4] )
621 const int d1 = d[0] & 0x7f;
622 const int d2 = d[1] & 0x7f;
625 else if( d1 == 0x1c )
627 else if( d1 == 0x15 )
629 else if( d1 == 0x1d )
632 static bool Eia608ParseTextAttribute( eia608_t *h, uint8_t d2 )
634 const int i_index = d2 - 0x20;
635 assert( d2 >= 0x20 && d2 <= 0x2f );
637 h->color = pac2_attribs[i_index].i_color;
638 h->font = pac2_attribs[i_index].i_font;
639 Eia608Cursor( h, 1 );
643 static bool Eia608ParseSingle( eia608_t *h, const uint8_t dx )
645 assert( dx >= 0x20 );
646 Eia608Write( h, dx );
649 static bool Eia608ParseDouble( eia608_t *h, uint8_t d2 )
651 assert( d2 >= 0x30 && d2 <= 0x3f );
652 Eia608Write( h, d2 + 0x50 ); /* We use charaters 0x80...0x8f */
655 static bool Eia608ParseExtended( eia608_t *h, uint8_t d1, uint8_t d2 )
657 assert( d2 >= 0x20 && d2 <= 0x3f );
658 assert( d1 == 0x12 || d1 == 0x13 );
660 d2 += 0x70; /* We use charaters 0x90-0xaf */
662 d2 += 0x90; /* We use charaters 0xb0-0xcf */
664 /* The extended characters replace the previous one with a more
666 Eia608Cursor( h, -1 );
667 Eia608Write( h, d2 );
670 static bool Eia608ParseCommand0x14( eia608_t *h, uint8_t d2 )
672 bool b_changed = false;
676 case 0x20: /* Resume caption loading */
677 h->mode = EIA608_MODE_POPUP;
679 case 0x21: /* Backspace */
683 case 0x22: /* Reserved */
686 case 0x24: /* Delete to end of row */
687 Eia608EraseToEndOfRow( h );
689 case 0x25: /* Rollup 2 */
690 case 0x26: /* Rollup 3 */
691 case 0x27: /* Rollup 4 */
692 if( h->mode == EIA608_MODE_POPUP || h->mode == EIA608_MODE_PAINTON )
694 Eia608EraseScreen( h, true );
695 Eia608EraseScreen( h, false );
700 h->mode = EIA608_MODE_ROLLUP_2;
701 else if( d2 == 0x26 )
702 h->mode = EIA608_MODE_ROLLUP_3;
704 h->mode = EIA608_MODE_ROLLUP_4;
706 h->cursor.i_column = 0;
707 h->cursor.i_row = h->i_row_rollup;
709 case 0x28: /* Flash on */
712 case 0x29: /* Resume direct captionning */
713 h->mode = EIA608_MODE_PAINTON;
715 case 0x2a: /* Text restart */
719 case 0x2b: /* Resume text display */
720 h->mode = EIA608_MODE_TEXT;
723 case 0x2c: /* Erase displayed memory */
724 Eia608EraseScreen( h, true );
727 case 0x2d: /* Carriage return */
731 case 0x2e: /* Erase non displayed memory */
732 Eia608EraseScreen( h, false );
734 case 0x2f: /* End of caption (flip screen if not paint on) */
735 if( h->mode != EIA608_MODE_PAINTON )
736 h->i_screen = 1 - h->i_screen;
737 h->mode = EIA608_MODE_POPUP;
738 h->cursor.i_column = 0;
740 h->color = EIA608_COLOR_DEFAULT;
741 h->font = EIA608_FONT_REGULAR;
747 static bool Eia608ParseCommand0x17( eia608_t *h, uint8_t d2 )
751 case 0x21: /* Tab offset 1 */
752 Eia608Cursor( h, 1 );
754 case 0x22: /* Tab offset 2 */
755 Eia608Cursor( h, 2 );
757 case 0x23: /* Tab offset 3 */
758 Eia608Cursor( h, 3 );
763 static bool Eia608ParsePac( eia608_t *h, uint8_t d1, uint8_t d2 )
765 static const int pi_row[] = {
766 11, -1, 1, 2, 3, 4, 12, 13, 14, 15, 5, 6, 7, 8, 9, 10
768 const int i_row_index = ( (d1<<1) & 0x0e) | ( (d2>>5) & 0x01 );
770 assert( d2 >= 0x40 && d2 <= 0x7f );
772 if( pi_row[i_row_index] <= 0 )
776 if( h->mode != EIA608_MODE_TEXT )
777 h->cursor.i_row = pi_row[i_row_index] - 1;
778 h->i_row_rollup = pi_row[i_row_index] - 1;
782 else if( d2 >= 0x40 )
784 h->cursor.i_column = pac2_attribs[d2].i_column;
788 static bool Eia608ParseData( eia608_t *h, uint8_t d1, uint8_t d2 )
790 bool b_changed = false;
792 if( d1 >= 0x18 && d1 <= 0x1f )
795 #define ON( d2min, d2max, cmd ) do { if( d2 >= d2min && d2 <= d2max ) b_changed = cmd; } while(0)
799 ON( 0x20, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
800 ON( 0x30, 0x3f, Eia608ParseDouble( h, d2 ) );
802 case 0x12: case 0x13:
803 ON( 0x20, 0x3f, Eia608ParseExtended( h, d1, d2 ) );
805 case 0x14: case 0x15:
806 ON( 0x20, 0x2f, Eia608ParseCommand0x14( h, d2 ) );
809 ON( 0x21, 0x22, Eia608ParseCommand0x17( h, d2 ) );
810 ON( 0x2e, 0x2f, Eia608ParseTextAttribute( h, d2 ) );
814 ON( 0x40, 0x5f, Eia608ParsePac( h, d1, d2 ) );
815 else if( d1 >= 0x11 && d1 <= 0x17 )
816 ON( 0x40, 0x7f, Eia608ParsePac( h, d1, d2 ) );
820 b_changed = Eia608ParseSingle( h, d1 );
822 b_changed |= Eia608ParseSingle( h, d2 );
827 static void Eia608TextUtf8( char *psz_utf8, uint8_t c ) // Returns number of bytes used
829 #define E1(c,u) { c, { u, '\0' } }
830 #define E2(c,u1,u2) { c, { u1, u2, '\0' } }
831 #define E3(c,u1,u2,u3) { c, { u1, u2, u3, '\0' } }
832 static const struct {
836 // Regular line-21 character set, mostly ASCII except these exceptions
837 E2( 0x2a, 0xc3,0xa1), // lowercase a, acute accent
838 E2( 0x5c, 0xc3,0xa9), // lowercase e, acute accent
839 E2( 0x5e, 0xc3,0xad), // lowercase i, acute accent
840 E2( 0x5f, 0xc3,0xb3), // lowercase o, acute accent
841 E2( 0x60, 0xc3,0xba), // lowercase u, acute accent
842 E2( 0x7b, 0xc3,0xa7), // lowercase c with cedilla
843 E2( 0x7c, 0xc3,0xb7), // division symbol
844 E2( 0x7d, 0xc3,0x91), // uppercase N tilde
845 E2( 0x7e, 0xc3,0xb1), // lowercase n tilde
846 // THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
847 // THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F
848 E2( 0x80, 0xc2,0xae), // Registered symbol (R)
849 E2( 0x81, 0xc2,0xb0), // degree sign
850 E2( 0x82, 0xc2,0xbd), // 1/2 symbol
851 E2( 0x83, 0xc2,0xbf), // Inverted (open) question mark
852 E3( 0x84, 0xe2,0x84,0xa2), // Trademark symbol (TM)
853 E2( 0x85, 0xc2,0xa2), // Cents symbol
854 E2( 0x86, 0xc2,0xa3), // Pounds sterling
855 E3( 0x87, 0xe2,0x99,0xaa), // Music note
856 E2( 0x88, 0xc3,0xa0), // lowercase a, grave accent
857 E1( 0x89, 0x20), // transparent space, we make it regular
858 E2( 0x8a, 0xc3,0xa8), // lowercase e, grave accent
859 E2( 0x8b, 0xc3,0xa2), // lowercase a, circumflex accent
860 E2( 0x8c, 0xc3,0xaa), // lowercase e, circumflex accent
861 E2( 0x8d, 0xc3,0xae), // lowercase i, circumflex accent
862 E2( 0x8e, 0xc3,0xb4), // lowercase o, circumflex accent
863 E2( 0x8f, 0xc3,0xbb), // lowercase u, circumflex accent
864 // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
865 // THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F
866 E2( 0x90, 0xc3,0x81), // capital letter A with acute
867 E2( 0x91, 0xc3,0x89), // capital letter E with acute
868 E2( 0x92, 0xc3,0x93), // capital letter O with acute
869 E2( 0x93, 0xc3,0x9a), // capital letter U with acute
870 E2( 0x94, 0xc3,0x9c), // capital letter U with diaresis
871 E2( 0x95, 0xc3,0xbc), // lowercase letter U with diaeresis
872 E1( 0x96, 0x27), // apostrophe
873 E2( 0x97, 0xc1,0xa1), // inverted exclamation mark
874 E1( 0x98, 0x2a), // asterisk
875 E1( 0x99, 0x27), // apostrophe (yes, duped). See CCADI source code.
876 E1( 0x9a, 0x2d), // hyphen-minus
877 E2( 0x9b, 0xc2,0xa9), // copyright sign
878 E3( 0x9c, 0xe2,0x84,0xa0), // Service mark
879 E1( 0x9d, 0x2e), // Full stop (.)
880 E1( 0x9e, 0x22), // Quoatation mark
881 E1( 0x9f, 0x22), // Quoatation mark
882 E2( 0xa0, 0xc3,0x80), // uppercase A, grave accent
883 E2( 0xa1, 0xc3,0x82), // uppercase A, circumflex
884 E2( 0xa2, 0xc3,0x87), // uppercase C with cedilla
885 E2( 0xa3, 0xc3,0x88), // uppercase E, grave accent
886 E2( 0xa4, 0xc3,0x8a), // uppercase E, circumflex
887 E2( 0xa5, 0xc3,0x8b), // capital letter E with diaresis
888 E2( 0xa6, 0xc3,0xab), // lowercase letter e with diaresis
889 E2( 0xa7, 0xc3,0x8e), // uppercase I, circumflex
890 E2( 0xa8, 0xc3,0x8f), // uppercase I, with diaresis
891 E2( 0xa9, 0xc3,0xaf), // lowercase i, with diaresis
892 E2( 0xaa, 0xc3,0x94), // uppercase O, circumflex
893 E2( 0xab, 0xc3,0x99), // uppercase U, grave accent
894 E2( 0xac, 0xc3,0xb9), // lowercase u, grave accent
895 E2( 0xad, 0xc3,0x9b), // uppercase U, circumflex
896 E2( 0xae, 0xc2,0xab), // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
897 E2( 0xaf, 0xc2,0xbb), // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
898 // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
899 // THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F
900 E2( 0xb0, 0xc3,0x83), // Uppercase A, tilde
901 E2( 0xb1, 0xc3,0xa3), // Lowercase a, tilde
902 E2( 0xb2, 0xc3,0x8d), // Uppercase I, acute accent
903 E2( 0xb3, 0xc3,0x8c), // Uppercase I, grave accent
904 E2( 0xb4, 0xc3,0xac), // Lowercase i, grave accent
905 E2( 0xb5, 0xc3,0x92), // Uppercase O, grave accent
906 E2( 0xb6, 0xc3,0xb2), // Lowercase o, grave accent
907 E2( 0xb7, 0xc3,0x95), // Uppercase O, tilde
908 E2( 0xb8, 0xc3,0xb5), // Lowercase o, tilde
909 E1( 0xb9, 0x7b), // Open curly brace
910 E1( 0xba, 0x7d), // Closing curly brace
911 E1( 0xbb, 0x5c), // Backslash
912 E1( 0xbc, 0x5e), // Caret
913 E1( 0xbd, 0x5f), // Underscore
914 E2( 0xbe, 0xc2,0xa6), // Pipe (broken bar)
915 E1( 0xbf, 0x7e), // Tilde (utf8 code unsure)
916 E2( 0xc0, 0xc3,0x84), // Uppercase A, umlaut
917 E2( 0xc1, 0xc3,0xa4), // Lowercase A, umlaut
918 E2( 0xc2, 0xc3,0x96), // Uppercase O, umlaut
919 E2( 0xc3, 0xc3,0xb6), // Lowercase o, umlaut
920 E2( 0xc4, 0xc3,0x9f), // Esszett (sharp S)
921 E2( 0xc5, 0xc2,0xa5), // Yen symbol
922 E2( 0xc6, 0xc2,0xa4), // Currency symbol
923 E1( 0xc7, 0x7c), // Vertical bar
924 E2( 0xc8, 0xc3,0x85), // Uppercase A, ring
925 E2( 0xc9, 0xc3,0xa5), // Lowercase A, ring
926 E2( 0xca, 0xc3,0x98), // Uppercase O, slash
927 E2( 0xcb, 0xc3,0xb8), // Lowercase o, slash
928 E3( 0xcc, 0xe2,0x8c,0x9c), // Upper left corner
929 E3( 0xcd, 0xe2,0x8c,0x9d), // Upper right corner
930 E3( 0xce, 0xe2,0x8c,0x9e), // Lower left corner
931 E3( 0xcf, 0xe2,0x8c,0x9f), // Lower right corner
939 static const int i_c2utf8 = sizeof(c2utf8)/sizeof(*c2utf8);
942 for( i = 0; i < i_c2utf8; i++ )
944 if( c2utf8[i].c == c )
949 psz_utf8[0] = c < 0x80 ? c : '?'; /* Normal : Unsupported */
954 strcpy( psz_utf8, c2utf8[i].utf8 );
958 static void Eia608Strlcat( char *d, const char *s, int i_max )
961 strncat( d, s, i_max-1 - strnlen(d, i_max-1));
966 static void Eia608TextLine( struct eia608_screen *screen, char *psz_text, int i_text_max, int i_row, bool b_html )
968 const uint8_t *p_char = screen->characters[i_row];
969 const eia608_color_t *p_color = screen->colors[i_row];
970 const eia608_font_t *p_font = screen->fonts[i_row];
974 eia608_color_t last_color = EIA608_COLOR_DEFAULT;
975 bool b_last_italics = false;
976 bool b_last_underline = false;
978 /* Search the start */
980 while( i_start < EIA608_SCREEN_COLUMNS-1 && p_char[i_start] == ' ' )
984 i_end = EIA608_SCREEN_COLUMNS-1;
985 while( i_end > i_start && p_char[i_end] == ' ' )
989 #define CAT(t) Eia608Strlcat( psz_text, t, i_text_max )
990 for( x = i_start; x <= i_end; x++ )
992 eia608_color_t color = p_color[x];
993 bool b_italics = p_font[x] & EIA608_FONT_ITALICS;
994 bool b_underline = p_font[x] & EIA608_FONT_UNDERLINE;
1000 bool b_close_color, b_close_italics, b_close_underline;
1002 /* We create the tags font / i / u in that orders */
1003 b_close_color = color != last_color && last_color != EIA608_COLOR_DEFAULT;
1004 b_close_italics = !b_italics && b_last_italics;
1005 b_close_underline = !b_underline && b_last_underline;
1007 /* Be sure to create valid html */
1008 b_close_italics |= b_last_italics && b_close_color;
1009 b_close_underline = b_last_underline && ( b_close_italics || b_close_color );
1011 if( b_close_underline )
1013 if( b_close_italics )
1018 if( color != EIA608_COLOR_DEFAULT && color != last_color)
1020 static const char *ppsz_color[] = {
1026 "#ffff00", // yellow
1027 "#ff00ff", // magenta
1028 "#ffffff", // user defined XXX we use white
1030 CAT( "<font color=" );
1031 CAT( ppsz_color[color] );
1034 if( ( b_close_italics && b_italics ) || ( b_italics && !b_last_italics ) )
1036 if( ( b_close_underline && b_underline ) || ( b_underline && !b_last_underline ) )
1041 Eia608TextUtf8( utf8, p_char[x] );
1045 b_last_underline = b_underline;
1046 b_last_italics = b_italics;
1051 if( b_last_underline )
1053 if( b_last_italics )
1055 if( last_color != EIA608_COLOR_DEFAULT )
1062 static void Eia608Init( eia608_t *h )
1064 memset( h, 0, sizeof(*h) );
1070 Eia608ClearScreen( h, 0 );
1071 Eia608ClearScreen( h, 1 );
1073 /* Cursor for writing text */
1074 h->cursor.i_column = 0;
1075 h->cursor.i_row = 0;
1079 h->mode = EIA608_MODE_POPUP;
1080 h->color = EIA608_COLOR_DEFAULT;
1081 h->font = EIA608_FONT_REGULAR;
1082 h->i_row_rollup = EIA608_SCREEN_ROWS-1;
1084 static bool Eia608Parse( eia608_t *h, int i_channel_selected, const uint8_t data[2] )
1086 const uint8_t d1 = data[0] & 0x7f; /* Removed parity bit */
1087 const uint8_t d2 = data[1] & 0x7f;
1088 bool b_screen_changed = false;
1090 if( d1 == 0 && d2 == 0 )
1091 return false; /* Ignore padding (parity check are sometimes invalid on them) */
1093 Eia608ParseChannel( h, data );
1094 if( h->i_channel != i_channel_selected )
1096 //fprintf( stderr, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC %x %x\n", data[0], data[1] );
1101 d1 != h->last.d1 || d2 != h->last.d2 ) /* Command codes can be repeated */
1102 b_screen_changed = Eia608ParseData( h, d1,d2 );
1107 else if( ( d1 >= 0x01 && d1 <= 0x0E ) || d1 == 0x0F )
1109 /* XDS block / End of XDS block */
1111 return b_screen_changed;
1114 static char *Eia608Text( eia608_t *h, bool b_html )
1116 const int i_size = EIA608_SCREEN_ROWS * 3 * EIA608_SCREEN_COLUMNS+1;
1117 struct eia608_screen *screen = &h->screen[h->i_screen];
1118 bool b_first = true;
1122 /* We allocate a buffer big enough for normal case */
1123 psz = malloc( i_size );
1128 Eia608Strlcat( psz, "<text>", i_size );
1129 for( i = 0; i < EIA608_SCREEN_ROWS; i++ )
1131 if( !screen->row_used[i] )
1135 Eia608Strlcat( psz, b_html ? "<br />" : "\n", i_size );
1138 Eia608TextLine( screen, psz, i_size, i, b_html );
1141 Eia608Strlcat( psz, "</text>", i_size );
1145 static void Eia608Exit( eia608_t *h )