1 /*****************************************************************************
2 * zvbi.c : VBI and Teletext PES demux and decoder using libzvbi
3 *****************************************************************************
4 * Copyright (C) 2007, M2X
7 * Authors: Derk-Jan Hartman <djhartman at m2x dot nl>
8 * Jean-Paul Saman <jpsaman at m2x dot nl>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
26 * NOTA BENE: this module requires the linking against a library which is
27 * known to require licensing under the GNU General Public License version 2
28 * (or later). Therefore, the result of compiling this module will normally
29 * be subject to the terms of that later license.
30 *****************************************************************************/
32 /*****************************************************************************
34 * information on teletext format can be found here :
35 * http://pdc.ro.nu/teletext.html
37 *****************************************************************************/
39 /* This module implements:
40 * ETSI EN 301 775: VBI data in PES
41 * ETSI EN 300 472: EBU Teletext data in PES
42 * ETSI EN 300 706: Enhanced Teletext (libzvbi)
43 * ETSI EN 300 231: Video Programme System [VPS] (libzvbi)
44 * ETSI EN 300 294: 625-line Wide Screen Signaling [WSS] (libzvbi)
45 * EIA-608 Revision A: Closed Captioning [CC] (libzvbi)
52 #include <vlc_common.h>
53 #include <vlc_plugin.h>
57 #include <vlc_codec.h>
59 /*****************************************************************************
61 *****************************************************************************/
62 static int Open ( vlc_object_t * );
63 static void Close( vlc_object_t * );
65 #define PAGE_TEXT N_("Teletext page")
66 #define PAGE_LONGTEXT N_("Open the indicated Teletext page." \
67 "Default page is index 100")
69 #define OPAQUE_TEXT N_("Teletext transparency")
70 #define OPAQUE_LONGTEXT N_("Setting vbi-opaque to false " \
71 "makes the boxed text transparent." )
73 #define POS_TEXT N_("Teletext alignment")
74 #define POS_LONGTEXT N_( \
75 "You can enforce the teletext position on the video " \
76 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
77 "also use combinations of these values, eg. 6 = top-right).")
79 #define TELX_TEXT N_("Teletext text subtitles")
80 #define TELX_LONGTEXT N_( "Output teletext subtitles as text " \
81 "instead of as RGBA" )
83 static const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
84 static const char *const ppsz_pos_descriptions[] =
85 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
86 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
89 set_description( N_("VBI and Teletext decoder") )
90 set_shortname( N_("VBI & Teletext") )
91 set_capability( "decoder", 51 )
92 set_category( CAT_INPUT )
93 set_subcategory( SUBCAT_INPUT_SCODEC )
94 set_callbacks( Open, Close )
96 add_integer( "vbi-page", 100,
97 PAGE_TEXT, PAGE_LONGTEXT, false )
98 add_bool( "vbi-opaque", true,
99 OPAQUE_TEXT, OPAQUE_LONGTEXT, false )
100 add_integer( "vbi-position", 4, POS_TEXT, POS_LONGTEXT, false )
101 change_integer_list( pi_pos_values, ppsz_pos_descriptions );
102 add_bool( "vbi-text", false,
103 TELX_TEXT, TELX_LONGTEXT, false )
106 /****************************************************************************
108 ****************************************************************************/
110 // #define ZVBI_DEBUG
112 //Guessing table for missing "default region triplet"
113 static const int pi_default_triplet[] = {
116 24,24,24,24, //ssc scr slv rum
117 32,32,32,32,32, //est lit rus bul ukr
122 static const char *const ppsz_default_triplet[] = {
125 "ssc", "scr", "slv", "rum",
126 "est", "lit", "rus", "bul", "ukr",
134 ZVBI_KEY_RED = 'r' << 16,
135 ZVBI_KEY_GREEN = 'g' << 16,
136 ZVBI_KEY_YELLOW = 'y' << 16,
137 ZVBI_KEY_BLUE = 'b' << 16,
138 ZVBI_KEY_INDEX = 'i' << 16,
142 DATA_UNIT_EBU_TELETEXT_NON_SUBTITLE = 0x02,
143 DATA_UNIT_EBU_TELETEXT_SUBTITLE = 0x03,
144 DATA_UNIT_EBU_TELETEXT_INVERTED = 0x0C,
146 DATA_UNIT_ZVBI_WSS_CPR1204 = 0xB4,
147 DATA_UNIT_ZVBI_CLOSED_CAPTION_525 = 0xB5,
148 DATA_UNIT_ZVBI_MONOCHROME_SAMPLES_525 = 0xB6,
150 DATA_UNIT_VPS = 0xC3,
151 DATA_UNIT_WSS = 0xC4,
152 DATA_UNIT_CLOSED_CAPTION = 0xC5,
153 DATA_UNIT_MONOCHROME_SAMPLES = 0xC6,
155 DATA_UNIT_STUFFING = 0xFF,
158 #define MAX_SLICES 32
162 vbi_decoder * p_vbi_dec;
163 vbi_sliced p_vbi_sliced[MAX_SLICES];
164 unsigned int i_last_page;
166 bool b_text; /* Subtitles as text */
168 vlc_mutex_t lock; /* Lock to protect the following variables */
169 /* Positioning of Teletext images */
172 unsigned int i_wanted_page;
173 unsigned int i_wanted_subpage;
182 static subpicture_t *Decode( decoder_t *, block_t ** );
184 static subpicture_t *Subpicture( decoder_t *p_dec, video_format_t *p_fmt,
186 int i_columns, int i_rows,
187 int i_align, mtime_t i_pts );
189 static void EventHandler( vbi_event *ev, void *user_data );
190 static int OpaquePage( picture_t *p_src, const vbi_page p_page,
191 const video_format_t fmt, bool b_opaque );
193 /* Properties callbacks */
194 static int RequestPage( vlc_object_t *p_this, char const *psz_cmd,
195 vlc_value_t oldval, vlc_value_t newval, void *p_data );
196 static int Opaque( vlc_object_t *p_this, char const *psz_cmd,
197 vlc_value_t oldval, vlc_value_t newval, void *p_data );
198 static int Position( vlc_object_t *p_this, char const *psz_cmd,
199 vlc_value_t oldval, vlc_value_t newval, void *p_data );
200 static int EventKey( vlc_object_t *p_this, char const *psz_cmd,
201 vlc_value_t oldval, vlc_value_t newval, void *p_data );
203 /*****************************************************************************
204 * Open: probe the decoder and return score
205 *****************************************************************************
206 * Tries to launch a decoder and return score so that the interface is able
208 *****************************************************************************/
209 static int Open( vlc_object_t *p_this )
211 decoder_t *p_dec = (decoder_t *) p_this;
212 decoder_sys_t *p_sys = NULL;
214 if( p_dec->fmt_in.i_codec != VLC_CODEC_TELETEXT )
217 p_dec->pf_decode_sub = Decode;
218 p_sys = p_dec->p_sys = calloc( 1, sizeof(decoder_sys_t) );
222 p_sys->i_key[0] = p_sys->i_key[1] = p_sys->i_key[2] = '*' - '0';
223 p_sys->b_update = false;
224 p_sys->p_vbi_dec = vbi_decoder_new();
225 vlc_mutex_init( &p_sys->lock );
227 if( p_sys->p_vbi_dec == NULL )
229 msg_Err( p_dec, "VBI decoder could not be created." );
234 /* Some broadcasters in countries with level 1 and level 1.5 still not send a G0 to do
235 * matches against table 32 of ETSI 300 706. We try to do some best effort guessing
236 * This is not perfect, but might handle some cases where we know the vbi language
237 * is known. It would be better if people started sending G0 */
238 for( int i = 0; ppsz_default_triplet[i] != NULL; i++ )
240 if( p_dec->fmt_in.psz_language && !strcasecmp( p_dec->fmt_in.psz_language, ppsz_default_triplet[i] ) )
242 vbi_teletext_set_default_region( p_sys->p_vbi_dec, pi_default_triplet[i]);
243 msg_Dbg( p_dec, "overwriting default zvbi region: %d", pi_default_triplet[i] );
247 vbi_event_handler_register( p_sys->p_vbi_dec, VBI_EVENT_TTX_PAGE | VBI_EVENT_NETWORK |
249 VBI_EVENT_CAPTION | VBI_EVENT_TRIGGER |
250 VBI_EVENT_ASPECT | VBI_EVENT_PROG_INFO | VBI_EVENT_NETWORK_ID |
252 0 , EventHandler, p_dec );
254 /* Create the var on vlc_global. */
255 p_sys->i_wanted_page = var_CreateGetInteger( p_dec, "vbi-page" );
256 var_AddCallback( p_dec, "vbi-page", RequestPage, p_sys );
258 /* Check if the Teletext track has a known "initial page". */
259 if( p_sys->i_wanted_page == 100 && p_dec->fmt_in.subs.teletext.i_magazine != -1 )
261 p_sys->i_wanted_page = 100 * p_dec->fmt_in.subs.teletext.i_magazine +
262 vbi_bcd2dec( p_dec->fmt_in.subs.teletext.i_page );
263 var_SetInteger( p_dec, "vbi-page", p_sys->i_wanted_page );
265 p_sys->i_wanted_subpage = VBI_ANY_SUBNO;
267 p_sys->b_opaque = var_CreateGetBool( p_dec, "vbi-opaque" );
268 var_AddCallback( p_dec, "vbi-opaque", Opaque, p_sys );
270 p_sys->i_align = var_CreateGetInteger( p_dec, "vbi-position" );
271 var_AddCallback( p_dec, "vbi-position", Position, p_sys );
273 p_sys->b_text = var_CreateGetBool( p_dec, "vbi-text" );
274 // var_AddCallback( p_dec, "vbi-text", Text, p_sys );
276 /* Listen for keys */
277 var_AddCallback( p_dec->p_libvlc, "key-pressed", EventKey, p_dec );
279 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_CODEC_SPU );
281 p_dec->fmt_out.video.i_chroma = VLC_CODEC_TEXT;
283 p_dec->fmt_out.video.i_chroma = VLC_CODEC_RGBA;
287 /*****************************************************************************
289 *****************************************************************************/
290 static void Close( vlc_object_t *p_this )
292 decoder_t *p_dec = (decoder_t*) p_this;
293 decoder_sys_t *p_sys = p_dec->p_sys;
295 var_DelCallback( p_dec, "vbi-position", Position, p_sys );
296 var_DelCallback( p_dec, "vbi-opaque", Opaque, p_sys );
297 var_DelCallback( p_dec, "vbi-page", RequestPage, p_sys );
298 var_DelCallback( p_dec->p_libvlc, "key-pressed", EventKey, p_dec );
300 vlc_mutex_destroy( &p_sys->lock );
302 if( p_sys->p_vbi_dec )
303 vbi_decoder_delete( p_sys->p_vbi_dec );
307 #ifdef WORDS_BIGENDIAN
308 # define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_BE
310 # define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_LE
313 /*****************************************************************************
315 *****************************************************************************/
316 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
318 decoder_sys_t *p_sys = p_dec->p_sys;
320 subpicture_t *p_spu = NULL;
322 bool b_cached = false;
325 if( (pp_block == NULL) || (*pp_block == NULL) )
331 if( p_block->i_buffer > 0 &&
332 ( ( p_block->p_buffer[0] >= 0x10 && p_block->p_buffer[0] <= 0x1f ) ||
333 ( p_block->p_buffer[0] >= 0x99 && p_block->p_buffer[0] <= 0x9b ) ) )
335 vbi_sliced *p_sliced = p_sys->p_vbi_sliced;
336 unsigned int i_lines = 0;
340 while( p_block->i_buffer >= 2 )
342 int i_id = p_block->p_buffer[0];
343 unsigned i_size = p_block->p_buffer[1];
345 if( 2 + i_size > p_block->i_buffer )
348 if( ( i_id == 0x02 || i_id == 0x03 ) && i_size >= 44 && i_lines < MAX_SLICES )
350 unsigned line_offset = p_block->p_buffer[2] & 0x1f;
351 unsigned field_parity = p_block->p_buffer[2] & 0x20;
353 p_sliced[i_lines].id = VBI_SLICED_TELETEXT_B;
354 if( line_offset > 0 )
355 p_sliced[i_lines].line = line_offset + (field_parity ? 0 : 313);
357 p_sliced[i_lines].line = 0;
358 for( int i = 0; i < 42; i++ )
359 p_sliced[i_lines].data[i] = vbi_rev8( p_block->p_buffer[4 + i] );
363 p_block->i_buffer -= 2 + i_size;
364 p_block->p_buffer += 2 + i_size;
368 vbi_decode( p_sys->p_vbi_dec, p_sliced, i_lines, (double)p_block->i_pts / 1000000 );
372 vlc_mutex_lock( &p_sys->lock );
373 const int i_align = p_sys->i_align;
374 const unsigned int i_wanted_page = p_sys->i_wanted_page;
375 const unsigned int i_wanted_subpage = p_sys->i_wanted_subpage;
376 const bool b_opaque = p_sys->b_opaque;
377 vlc_mutex_unlock( &p_sys->lock );
379 /* Try to see if the page we want is in the cache yet */
380 memset( &p_page, 0, sizeof(vbi_page) );
381 b_cached = vbi_fetch_vt_page( p_sys->p_vbi_dec, &p_page,
382 vbi_dec2bcd( i_wanted_page ),
383 i_wanted_subpage, VBI_WST_LEVEL_3p5,
386 if( i_wanted_page == p_sys->i_last_page && !p_sys->b_update )
391 if( p_sys->i_last_page != i_wanted_page )
393 /* We need to reset the subtitle */
394 p_spu = Subpicture( p_dec, &fmt, true,
395 p_page.columns, p_page.rows,
396 i_align, p_block->i_pts );
399 p_spu->p_region->psz_text = strdup("");
401 p_sys->b_update = true;
402 p_sys->i_last_page = i_wanted_page;
408 p_sys->b_update = false;
409 p_sys->i_last_page = i_wanted_page;
411 msg_Dbg( p_dec, "we now have page: %d ready for display",
414 /* If there is a page or sub to render, then we do that here */
415 /* Create the subpicture unit */
416 p_spu = Subpicture( p_dec, &fmt, p_sys->b_text,
417 p_page.columns, p_page.rows,
418 i_align, p_block->i_pts );
424 unsigned int i_textsize = 7000;
426 char p_text[i_textsize+1];
428 i_total = vbi_print_page_region( &p_page, p_text, i_textsize,
429 "UTF-8", 0, 0, 0, 0, p_page.columns, p_page.rows );
430 p_text[i_total] = '\0';
431 /* Strip off the pagenumber */
434 p_spu->p_region->psz_text = strdup( &p_text[8] );
437 msg_Info( p_dec, "page %x-%x(%d)\n%s", p_page.pgno, p_page.subno, i_total, p_text );
442 picture_t *p_pic = p_spu->p_region->p_picture;
444 /* ZVBI is stupid enough to assume pitch == width */
445 p_pic->p->i_pitch = 4 * fmt.i_width;
446 vbi_draw_vt_page( &p_page, ZVBI_PIXFMT_RGBA32,
447 p_spu->p_region->p_picture->p->p_pixels, 1, 1 );
449 vlc_mutex_lock( &p_sys->lock );
450 memcpy( p_sys->nav_link, &p_page.nav_link, sizeof( p_sys->nav_link )) ;
451 vlc_mutex_unlock( &p_sys->lock );
453 OpaquePage( p_pic, p_page, fmt, b_opaque );
457 vbi_unref_page( &p_page );
458 block_Release( p_block );
462 vbi_unref_page( &p_page );
465 decoder_DeleteSubpicture( p_dec, p_spu );
469 block_Release( p_block );
473 static subpicture_t *Subpicture( decoder_t *p_dec, video_format_t *p_fmt,
475 int i_columns, int i_rows, int i_align,
481 /* If there is a page or sub to render, then we do that here */
482 /* Create the subpicture unit */
483 p_spu = decoder_NewSubpicture( p_dec, NULL );
486 msg_Warn( p_dec, "can't get spu buffer" );
490 memset( &fmt, 0, sizeof(video_format_t) );
491 fmt.i_chroma = b_text ? VLC_CODEC_TEXT : VLC_CODEC_RGBA;
496 fmt.i_bits_per_pixel = 0;
500 fmt.i_width = fmt.i_visible_width = i_columns * 12;
501 fmt.i_height = fmt.i_visible_height = i_rows * 10;
502 fmt.i_bits_per_pixel = 32;
504 fmt.i_x_offset = fmt.i_y_offset = 0;
506 p_spu->p_region = subpicture_region_New( &fmt );
507 if( p_spu->p_region == NULL )
509 msg_Err( p_dec, "cannot allocate SPU region" );
510 decoder_DeleteSubpicture( p_dec, p_spu );
514 p_spu->p_region->i_x = 0;
515 p_spu->p_region->i_y = 0;
516 p_spu->p_region->i_align = i_align;
518 p_spu->i_start = i_pts;
520 p_spu->b_ephemer = true;
521 p_spu->b_absolute = false;
525 p_spu->i_original_picture_width = fmt.i_width;
526 p_spu->i_original_picture_height = fmt.i_height;
534 static void EventHandler( vbi_event *ev, void *user_data )
536 decoder_t *p_dec = (decoder_t *)user_data;
537 decoder_sys_t *p_sys = p_dec->p_sys;
539 if( ev->type == VBI_EVENT_TTX_PAGE )
542 msg_Info( p_dec, "Page %03x.%02x ",
543 ev->ev.ttx_page.pgno,
544 ev->ev.ttx_page.subno & 0xFF);
546 if( p_sys->i_last_page == vbi_bcd2dec( ev->ev.ttx_page.pgno ) )
547 p_sys->b_update = true;
549 if( ev->ev.ttx_page.clock_update )
550 msg_Dbg( p_dec, "clock" );
551 if( ev->ev.ttx_page.header_update )
552 msg_Dbg( p_dec, "header" );
555 else if( ev->type == VBI_EVENT_CLOSE )
556 msg_Dbg( p_dec, "Close event" );
557 else if( ev->type == VBI_EVENT_CAPTION )
558 msg_Dbg( p_dec, "Caption line: %x", ev->ev.caption.pgno );
559 else if( ev->type == VBI_EVENT_NETWORK )
561 msg_Dbg( p_dec, "Network change");
562 vbi_network n = ev->ev.network;
563 msg_Dbg( p_dec, "Network id:%d name: %s, call: %s ", n.nuid, n.name, n.call );
565 else if( ev->type == VBI_EVENT_TRIGGER )
566 msg_Dbg( p_dec, "Trigger event" );
567 else if( ev->type == VBI_EVENT_ASPECT )
568 msg_Dbg( p_dec, "Aspect update" );
569 else if( ev->type == VBI_EVENT_PROG_INFO )
570 msg_Dbg( p_dec, "Program info received" );
571 else if( ev->type == VBI_EVENT_NETWORK_ID )
572 msg_Dbg( p_dec, "Network ID changed" );
575 static int OpaquePage( picture_t *p_src, const vbi_page p_page,
576 const video_format_t fmt, bool b_opaque )
580 assert( fmt.i_chroma == VLC_CODEC_RGBA );
582 /* Kludge since zvbi doesn't provide an option to specify opacity. */
583 for( y = 0; y < fmt.i_height; y++ )
585 for( x = 0; x < fmt.i_width; x++ )
587 const vbi_opacity opacity = p_page.text[ y/10 * p_page.columns + x/12 ].opacity;
588 const int background = p_page.text[ y/10 * p_page.columns + x/12 ].background;
589 uint32_t *p_pixel = (uint32_t*)&p_src->p->p_pixels[y * p_src->p->i_pitch + 4*x];
593 /* Show video instead of this character */
594 case VBI_TRANSPARENT_SPACE:
597 /* Display foreground and background color */
598 /* To make the boxed text "closed captioning" transparent
599 * change true to false.
602 /* alpha blend video into background color */
603 case VBI_SEMI_TRANSPARENT:
606 /* Full text transparency. only foreground color is show */
607 case VBI_TRANSPARENT_FULL:
608 if( (*p_pixel) == (0xff000000 | p_page.color_map[background] ) )
619 static int RequestPage( vlc_object_t *p_this, char const *psz_cmd,
620 vlc_value_t oldval, vlc_value_t newval, void *p_data )
622 decoder_sys_t *p_sys = p_data;
623 VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
625 vlc_mutex_lock( &p_sys->lock );
626 switch( newval.i_int )
629 p_sys->i_wanted_page = vbi_bcd2dec( p_sys->nav_link[0].pgno );
630 p_sys->i_wanted_subpage = p_sys->nav_link[0].subno;
633 p_sys->i_wanted_page = vbi_bcd2dec( p_sys->nav_link[1].pgno );
634 p_sys->i_wanted_subpage = p_sys->nav_link[1].subno;
636 case ZVBI_KEY_YELLOW:
637 p_sys->i_wanted_page = vbi_bcd2dec( p_sys->nav_link[2].pgno );
638 p_sys->i_wanted_subpage = p_sys->nav_link[2].subno;
641 p_sys->i_wanted_page = vbi_bcd2dec( p_sys->nav_link[3].pgno );
642 p_sys->i_wanted_subpage = p_sys->nav_link[3].subno;
645 p_sys->i_wanted_page = vbi_bcd2dec( p_sys->nav_link[5].pgno ); /* #4 is SKIPPED */
646 p_sys->i_wanted_subpage = p_sys->nav_link[5].subno;
649 if( newval.i_int > 0 && newval.i_int < 999 )
651 p_sys->i_wanted_page = newval.i_int;
652 p_sys->i_wanted_subpage = VBI_ANY_SUBNO;
654 vlc_mutex_unlock( &p_sys->lock );
659 static int Opaque( vlc_object_t *p_this, char const *psz_cmd,
660 vlc_value_t oldval, vlc_value_t newval, void *p_data )
662 decoder_sys_t *p_sys = p_data;
663 VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
665 vlc_mutex_lock( &p_sys->lock );
666 p_sys->b_opaque = newval.b_bool;
667 p_sys->b_update = true;
668 vlc_mutex_unlock( &p_sys->lock );
673 static int Position( vlc_object_t *p_this, char const *psz_cmd,
674 vlc_value_t oldval, vlc_value_t newval, void *p_data )
676 decoder_sys_t *p_sys = p_data;
677 VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
679 vlc_mutex_lock( &p_sys->lock );
680 p_sys->i_align = newval.i_int;
681 vlc_mutex_unlock( &p_sys->lock );
686 static int EventKey( vlc_object_t *p_this, char const *psz_cmd,
687 vlc_value_t oldval, vlc_value_t newval, void *p_data )
689 decoder_t *p_dec = p_data;
690 decoder_sys_t *p_sys = p_dec->p_sys;
692 VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED( p_this );
694 /* FIXME: Capture + and - key for subpage browsing */
695 if( newval.i_int == '-' || newval.i_int == '+' )
697 vlc_mutex_lock( &p_sys->lock );
698 if( p_sys->i_wanted_subpage == VBI_ANY_SUBNO && newval.i_int == '+' )
699 p_sys->i_wanted_subpage = vbi_dec2bcd(1);
700 else if ( newval.i_int == '+' )
701 p_sys->i_wanted_subpage = vbi_add_bcd( p_sys->i_wanted_subpage, 1);
702 else if( newval.i_int == '-')
703 p_sys->i_wanted_subpage = vbi_add_bcd( p_sys->i_wanted_subpage, 0xF9999999); /* BCD complement - 1 */
705 if ( !vbi_bcd_digits_greater( p_sys->i_wanted_subpage, 0x00 ) || vbi_bcd_digits_greater( p_sys->i_wanted_subpage, 0x99 ) )
706 p_sys->i_wanted_subpage = VBI_ANY_SUBNO;
708 msg_Info( p_dec, "subpage: %d",
709 vbi_bcd2dec( p_sys->i_wanted_subpage) );
711 p_sys->b_update = true;
712 vlc_mutex_unlock( &p_sys->lock );
715 /* Capture 0-9 for page selection */
716 if( newval.i_int < '0' || newval.i_int > '9' )
719 vlc_mutex_lock( &p_sys->lock );
720 p_sys->i_key[0] = p_sys->i_key[1];
721 p_sys->i_key[1] = p_sys->i_key[2];
722 p_sys->i_key[2] = (int)(newval.i_int - '0');
723 msg_Info( p_dec, "page: %c%c%c", (char)(p_sys->i_key[0]+'0'),
724 (char)(p_sys->i_key[1]+'0'), (char)(p_sys->i_key[2]+'0') );
728 if( p_sys->i_key[0] > 0 && p_sys->i_key[0] <= 8 &&
729 p_sys->i_key[1] >= 0 && p_sys->i_key[1] <= 9 &&
730 p_sys->i_key[2] >= 0 && p_sys->i_key[2] <= 9 )
732 i_new_page = p_sys->i_key[0]*100 + p_sys->i_key[1]*10 + p_sys->i_key[2];
733 p_sys->i_key[0] = p_sys->i_key[1] = p_sys->i_key[2] = '*' - '0';
735 vlc_mutex_unlock( &p_sys->lock );
738 var_SetInteger( p_dec, "vbi-page", i_new_page );