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 /*****************************************************************************
27 * information on teletext format can be found here :
28 * http://pdc.ro.nu/teletext.html
30 *****************************************************************************/
32 /* This module implements:
33 * ETSI EN 301 775: VBI data in PES
34 * ETSI EN 300 472: EBU Teletext data in PES
35 * ETSI EN 300 706: Enhanced Teletext (libzvbi)
36 * ETSI EN 300 231: Video Programme System [VPS] (libzvbi)
37 * ETSI EN 300 294: 625-line Wide Screen Signaling [WSS] (libzvbi)
38 * EIA-608 Revision A: Closed Captioning [CC] (libzvbi)
47 #include <vlc_common.h>
48 #include <vlc_plugin.h>
52 #include <vlc_codec.h>
55 /*****************************************************************************
57 *****************************************************************************/
58 static int Open ( vlc_object_t
* );
59 static void Close( vlc_object_t
* );
61 #define PAGE_TEXT N_("Teletext page")
62 #define PAGE_LONGTEXT N_("Open the indicated Teletext page. " \
63 "Default page is index 100")
65 #define OPAQUE_TEXT N_("Opacity")
66 #define OPAQUE_LONGTEXT N_("Setting to true " \
67 "makes the text to be boxed and maybe easier to read." )
69 #define POS_TEXT N_("Teletext alignment")
70 #define POS_LONGTEXT N_( \
71 "You can enforce the teletext position on the video " \
72 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
73 "also use combinations of these values, eg. 6 = top-right).")
75 #define TELX_TEXT N_("Teletext text subtitles")
76 #define TELX_LONGTEXT N_( "Output teletext subtitles as text " \
77 "instead of as RGBA" )
79 #define LEVEL_TEXT N_("Presentation Level")
81 static const int pi_pos_values
[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
82 static const char *const ppsz_pos_descriptions
[] =
83 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
84 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
86 static const int level_values
[] = { 0, 1, 2, 3 };
87 static const char *const level_descriptions
[] =
88 { N_("1"), N_("1.5"), N_("2.5"), N_("3.5") };
90 /* separate internal and zvbi values, as the latter could change */
91 static const int level_zvbi_values
[] =
92 { VBI_WST_LEVEL_1
, VBI_WST_LEVEL_1p5
, VBI_WST_LEVEL_2p5
, VBI_WST_LEVEL_3p5
};
95 set_description( N_("VBI and Teletext decoder") )
96 set_shortname( N_("VBI & Teletext") )
97 set_capability( "decoder", 51 )
98 set_category( CAT_INPUT
)
99 set_subcategory( SUBCAT_INPUT_SCODEC
)
100 set_callbacks( Open
, Close
)
102 add_integer( "vbi-page", 100,
103 PAGE_TEXT
, PAGE_LONGTEXT
, false )
104 add_bool( "vbi-opaque", false,
105 OPAQUE_TEXT
, OPAQUE_LONGTEXT
, false )
106 add_integer( "vbi-position", 8, POS_TEXT
, POS_LONGTEXT
, false )
107 change_integer_list( pi_pos_values
, ppsz_pos_descriptions
);
108 add_bool( "vbi-text", false,
109 TELX_TEXT
, TELX_LONGTEXT
, false )
110 add_integer( "vbi-level", 3, LEVEL_TEXT
, NULL
, false )
111 change_integer_list( level_values
, level_descriptions
);
114 /****************************************************************************
116 ****************************************************************************/
118 // #define ZVBI_DEBUG
120 //Guessing table for missing "default region triplet"
121 static const int pi_default_triplet
[] = {
122 0, 0, 0, 0, // slo slk cze ces
124 24,24,24,24,24, //scc scr srp hrv slv
126 32,32,32,32,32, //est lit rus bul ukr
131 static const char *const ppsz_default_triplet
[] = {
132 "slo", "slk", "cze", "ces",
134 "scc", "scr", "srp", "hrv", "slv",
136 "est", "lit", "rus", "bul", "ukr",
144 ZVBI_KEY_RED
= 'r' << 16,
145 ZVBI_KEY_GREEN
= 'g' << 16,
146 ZVBI_KEY_YELLOW
= 'y' << 16,
147 ZVBI_KEY_BLUE
= 'b' << 16,
148 ZVBI_KEY_INDEX
= 'i' << 16,
151 #define MAX_SLICES 32
155 vbi_decoder
* p_vbi_dec
;
156 vbi_sliced p_vbi_sliced
[MAX_SLICES
];
157 unsigned int i_last_page
;
159 bool b_text
; /* Subtitles as text */
161 vlc_mutex_t lock
; /* Lock to protect the following variables */
162 /* Positioning of Teletext images */
165 unsigned int i_wanted_page
;
166 unsigned int i_wanted_subpage
;
169 unsigned int i_level
;
176 static subpicture_t
*Decode( decoder_t
*, block_t
** );
178 static subpicture_t
*Subpicture( decoder_t
*p_dec
, video_format_t
*p_fmt
,
180 int i_columns
, int i_rows
,
181 int i_align
, mtime_t i_pts
);
183 static void EventHandler( vbi_event
*ev
, void *user_data
);
184 static int OpaquePage( picture_t
*p_src
, const vbi_page
*p_page
,
185 const video_format_t fmt
, bool b_opaque
, const int text_offset
);
186 static int get_first_visible_row( vbi_char
*p_text
, int rows
, int columns
);
187 static int get_last_visible_row( vbi_char
*p_text
, int rows
, int columns
);
189 /* Properties callbacks */
190 static int RequestPage( vlc_object_t
*p_this
, char const *psz_cmd
,
191 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
);
192 static int Opaque( vlc_object_t
*p_this
, char const *psz_cmd
,
193 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
);
194 static int EventKey( vlc_object_t
*p_this
, char const *psz_cmd
,
195 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
);
197 /*****************************************************************************
198 * Open: probe the decoder and return score
199 *****************************************************************************
200 * Tries to launch a decoder and return score so that the interface is able
202 *****************************************************************************/
203 static int Open( vlc_object_t
*p_this
)
205 decoder_t
*p_dec
= (decoder_t
*) p_this
;
206 decoder_sys_t
*p_sys
= NULL
;
208 if( p_dec
->fmt_in
.i_codec
!= VLC_CODEC_TELETEXT
)
211 p_sys
= p_dec
->p_sys
= calloc( 1, sizeof(decoder_sys_t
) );
215 p_sys
->i_key
[0] = p_sys
->i_key
[1] = p_sys
->i_key
[2] = '*' - '0';
216 p_sys
->b_update
= false;
217 p_sys
->p_vbi_dec
= vbi_decoder_new();
218 vlc_mutex_init( &p_sys
->lock
);
220 if( p_sys
->p_vbi_dec
== NULL
)
222 msg_Err( p_dec
, "VBI decoder could not be created." );
227 /* Some broadcasters in countries with level 1 and level 1.5 still not send a G0 to do
228 * matches against table 32 of ETSI 300 706. We try to do some best effort guessing
229 * This is not perfect, but might handle some cases where we know the vbi language
230 * is known. It would be better if people started sending G0 */
231 for( int i
= 0; ppsz_default_triplet
[i
] != NULL
; i
++ )
233 if( p_dec
->fmt_in
.psz_language
&& !strcasecmp( p_dec
->fmt_in
.psz_language
, ppsz_default_triplet
[i
] ) )
235 vbi_teletext_set_default_region( p_sys
->p_vbi_dec
, pi_default_triplet
[i
]);
236 msg_Dbg( p_dec
, "overwriting default zvbi region: %d", pi_default_triplet
[i
] );
240 vbi_event_handler_register( p_sys
->p_vbi_dec
, VBI_EVENT_TTX_PAGE
| VBI_EVENT_NETWORK
|
242 VBI_EVENT_CAPTION
| VBI_EVENT_TRIGGER
|
243 VBI_EVENT_ASPECT
| VBI_EVENT_PROG_INFO
| VBI_EVENT_NETWORK_ID
|
245 0 , EventHandler
, p_dec
);
247 /* Create the var on vlc_global. */
248 p_sys
->i_wanted_page
= var_CreateGetInteger( p_dec
, "vbi-page" );
249 var_AddCallback( p_dec
, "vbi-page", RequestPage
, p_sys
);
251 /* Check if the Teletext track has a known "initial page". */
252 if( p_sys
->i_wanted_page
== 100 && p_dec
->fmt_in
.subs
.teletext
.i_magazine
!= -1 )
254 p_sys
->i_wanted_page
= 100 * p_dec
->fmt_in
.subs
.teletext
.i_magazine
+
255 vbi_bcd2dec( p_dec
->fmt_in
.subs
.teletext
.i_page
);
256 var_SetInteger( p_dec
, "vbi-page", p_sys
->i_wanted_page
);
258 p_sys
->i_wanted_subpage
= VBI_ANY_SUBNO
;
260 p_sys
->b_opaque
= var_CreateGetBool( p_dec
, "vbi-opaque" );
261 var_AddCallback( p_dec
, "vbi-opaque", Opaque
, p_sys
);
263 p_sys
->i_align
= var_CreateGetInteger( p_dec
, "vbi-position" );
265 p_sys
->b_text
= var_CreateGetBool( p_dec
, "vbi-text" );
267 p_sys
->i_level
= var_CreateGetInteger( p_dec
, "vbi-level" );
269 /* Listen for keys */
270 var_AddCallback( p_dec
->obj
.libvlc
, "key-pressed", EventKey
, p_dec
);
272 es_format_Init( &p_dec
->fmt_out
, SPU_ES
, VLC_CODEC_SPU
);
274 p_dec
->fmt_out
.video
.i_chroma
= VLC_CODEC_TEXT
;
276 p_dec
->fmt_out
.video
.i_chroma
= VLC_CODEC_RGBA
;
278 p_dec
->pf_decode_sub
= Decode
;
282 /*****************************************************************************
284 *****************************************************************************/
285 static void Close( vlc_object_t
*p_this
)
287 decoder_t
*p_dec
= (decoder_t
*) p_this
;
288 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
290 var_DelCallback( p_dec
, "vbi-opaque", Opaque
, p_sys
);
291 var_DelCallback( p_dec
, "vbi-page", RequestPage
, p_sys
);
292 var_DelCallback( p_dec
->obj
.libvlc
, "key-pressed", EventKey
, p_dec
);
294 vlc_mutex_destroy( &p_sys
->lock
);
296 if( p_sys
->p_vbi_dec
)
297 vbi_decoder_delete( p_sys
->p_vbi_dec
);
301 #ifdef WORDS_BIGENDIAN
302 # define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_BE
304 # define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_LE
307 /*****************************************************************************
309 *****************************************************************************/
310 static subpicture_t
*Decode( decoder_t
*p_dec
, block_t
**pp_block
)
312 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
314 subpicture_t
*p_spu
= NULL
;
316 bool b_cached
= false;
319 if( (pp_block
== NULL
) || (*pp_block
== NULL
) )
325 if( p_block
->i_buffer
> 0 &&
326 ( ( p_block
->p_buffer
[0] >= 0x10 && p_block
->p_buffer
[0] <= 0x1f ) ||
327 ( p_block
->p_buffer
[0] >= 0x99 && p_block
->p_buffer
[0] <= 0x9b ) ) )
329 vbi_sliced
*p_sliced
= p_sys
->p_vbi_sliced
;
330 unsigned int i_lines
= 0;
334 while( p_block
->i_buffer
>= 2 )
336 int i_id
= p_block
->p_buffer
[0];
337 unsigned i_size
= p_block
->p_buffer
[1];
339 if( 2 + i_size
> p_block
->i_buffer
)
342 if( ( i_id
== 0x02 || i_id
== 0x03 ) && i_size
>= 44 && i_lines
< MAX_SLICES
)
344 if(p_block
->p_buffer
[3] == 0xE4 ) /* framing_code */
346 unsigned line_offset
= p_block
->p_buffer
[2] & 0x1f;
347 unsigned field_parity
= p_block
->p_buffer
[2] & 0x20;
349 p_sliced
[i_lines
].id
= VBI_SLICED_TELETEXT_B
;
350 if( line_offset
> 0 )
351 p_sliced
[i_lines
].line
= line_offset
+ (field_parity
? 0 : 313);
353 p_sliced
[i_lines
].line
= 0;
354 for( int i
= 0; i
< 42; i
++ )
355 p_sliced
[i_lines
].data
[i
] = vbi_rev8( p_block
->p_buffer
[4 + i
] );
360 p_block
->i_buffer
-= 2 + i_size
;
361 p_block
->p_buffer
+= 2 + i_size
;
365 vbi_decode( p_sys
->p_vbi_dec
, p_sliced
, i_lines
, 0 );
369 vlc_mutex_lock( &p_sys
->lock
);
370 const int i_align
= p_sys
->i_align
;
371 const unsigned int i_wanted_page
= p_sys
->i_wanted_page
;
372 const unsigned int i_wanted_subpage
= p_sys
->i_wanted_subpage
;
373 const bool b_opaque
= p_sys
->b_opaque
;
374 const unsigned int i_level
= p_sys
->i_level
> 3 ? 3 : p_sys
->i_level
;
375 vlc_mutex_unlock( &p_sys
->lock
);
377 /* Try to see if the page we want is in the cache yet */
378 memset( &p_page
, 0, sizeof(vbi_page
) );
379 b_cached
= vbi_fetch_vt_page( p_sys
->p_vbi_dec
, &p_page
,
380 vbi_dec2bcd( i_wanted_page
),
381 i_wanted_subpage
, level_zvbi_values
[i_level
],
384 if( i_wanted_page
== p_sys
->i_last_page
&& !p_sys
->b_update
)
389 if( p_sys
->b_text
&& p_sys
->i_last_page
!= i_wanted_page
)
391 /* We need to reset the subtitle */
392 p_spu
= Subpicture( p_dec
, &fmt
, true,
393 p_page
.columns
, p_page
.rows
,
394 i_align
, p_block
->i_pts
);
397 subpicture_updater_sys_t
*p_spu_sys
= p_spu
->updater
.p_sys
;
398 p_spu_sys
->p_segments
= text_segment_New("");
400 p_sys
->b_update
= true;
401 p_sys
->i_last_page
= i_wanted_page
;
407 p_sys
->b_update
= false;
408 p_sys
->i_last_page
= i_wanted_page
;
410 msg_Dbg( p_dec
, "we now have page: %d ready for display",
414 /* Ignore transparent rows at the beginning and end */
415 int i_first_row
= get_first_visible_row( p_page
.text
, p_page
.rows
, p_page
.columns
);
417 if ( i_first_row
< 0 ) {
418 i_first_row
= p_page
.rows
- 1;
421 i_num_rows
= get_last_visible_row( p_page
.text
, p_page
.rows
, p_page
.columns
) - i_first_row
+ 1;
424 msg_Dbg( p_dec
, "After top and tail of page we have rows %i-%i of %i",
425 i_first_row
+ 1, i_first_row
+ i_num_rows
, p_page
.rows
);
428 /* If there is a page or sub to render, then we do that here */
429 /* Create the subpicture unit */
430 p_spu
= Subpicture( p_dec
, &fmt
, p_sys
->b_text
,
431 p_page
.columns
, i_num_rows
,
432 i_align
, p_block
->i_pts
);
438 unsigned int i_textsize
= 7000;
440 char p_text
[i_textsize
+1];
442 i_total
= vbi_print_page_region( &p_page
, p_text
, i_textsize
,
443 "UTF-8", 0, 0, 0, i_first_row
, p_page
.columns
, i_num_rows
);
445 for( offset
=1; offset
<i_total
&& isspace( p_text
[i_total
-offset
] ); offset
++)
446 p_text
[i_total
-offset
] = '\0';
451 while( offset
< i_total
&& isspace( p_text
[offset
] ) )
454 subpicture_updater_sys_t
*p_spu_sys
= p_spu
->updater
.p_sys
;
455 p_spu_sys
->p_segments
= text_segment_New( &p_text
[offset
] );
456 if( p_spu_sys
->p_segments
&& b_opaque
)
458 p_spu_sys
->p_segments
->style
= text_style_Create( STYLE_NO_DEFAULTS
);
459 if( p_spu_sys
->p_segments
->style
)
461 /* Set text background */
462 p_spu_sys
->p_segments
->style
->i_style_flags
= STYLE_BACKGROUND
;
463 p_spu_sys
->p_segments
->style
->i_features
|= STYLE_HAS_FLAGS
;
467 p_spu_sys
->align
= i_align
;
468 p_spu_sys
->noregionbg
= true;
471 msg_Info( p_dec
, "page %x-%x(%d)\n\"%s\"", p_page
.pgno
, p_page
.subno
, i_total
, &p_text
[offset
] );
476 picture_t
*p_pic
= p_spu
->p_region
->p_picture
;
478 /* ZVBI is stupid enough to assume pitch == width */
479 p_pic
->p
->i_pitch
= 4 * fmt
.i_width
;
481 /* Maintain subtitle postion */
482 p_spu
->p_region
->i_y
= i_first_row
*10;
483 p_spu
->i_original_picture_width
= p_page
.columns
*12;
484 p_spu
->i_original_picture_height
= p_page
.rows
*10;
486 vbi_draw_vt_page_region( &p_page
, ZVBI_PIXFMT_RGBA32
,
487 p_spu
->p_region
->p_picture
->p
->p_pixels
, -1,
488 0, i_first_row
, p_page
.columns
, i_num_rows
,
491 vlc_mutex_lock( &p_sys
->lock
);
492 memcpy( p_sys
->nav_link
, &p_page
.nav_link
, sizeof( p_sys
->nav_link
)) ;
493 vlc_mutex_unlock( &p_sys
->lock
);
495 OpaquePage( p_pic
, &p_page
, fmt
, b_opaque
, i_first_row
* p_page
.columns
);
499 vbi_unref_page( &p_page
);
500 block_Release( p_block
);
504 vbi_unref_page( &p_page
);
505 block_Release( p_block
);
509 static subpicture_t
*Subpicture( decoder_t
*p_dec
, video_format_t
*p_fmt
,
511 int i_columns
, int i_rows
, int i_align
,
515 subpicture_t
*p_spu
=NULL
;
517 /* If there is a page or sub to render, then we do that here */
518 /* Create the subpicture unit */
520 p_spu
= decoder_NewSubpictureText( p_dec
);
522 p_spu
= decoder_NewSubpicture( p_dec
, NULL
);
525 msg_Warn( p_dec
, "can't get spu buffer" );
529 video_format_Init(&fmt
, b_text
? VLC_CODEC_TEXT
: VLC_CODEC_RGBA
);
532 fmt
.i_bits_per_pixel
= 0;
536 fmt
.i_width
= fmt
.i_visible_width
= i_columns
* 12;
537 fmt
.i_height
= fmt
.i_visible_height
= i_rows
* 10;
538 fmt
.i_bits_per_pixel
= 32;
539 fmt
.i_sar_num
= fmt
.i_sar_den
= 0; /* let the vout set the correct AR */
541 fmt
.i_x_offset
= fmt
.i_y_offset
= 0;
543 p_spu
->p_region
= subpicture_region_New( &fmt
);
544 if( p_spu
->p_region
== NULL
)
546 msg_Err( p_dec
, "cannot allocate SPU region" );
547 subpicture_Delete( p_spu
);
551 p_spu
->p_region
->i_x
= 0;
552 p_spu
->p_region
->i_y
= 0;
554 p_spu
->i_start
= i_pts
;
555 p_spu
->i_stop
= b_text
? i_pts
+ (10*CLOCK_FREQ
): 0;
556 p_spu
->b_ephemer
= true;
557 p_spu
->b_absolute
= b_text
? false : true;
560 p_spu
->p_region
->i_align
= i_align
;
561 p_spu
->i_original_picture_width
= fmt
.i_width
;
562 p_spu
->i_original_picture_height
= fmt
.i_height
;
569 static void EventHandler( vbi_event
*ev
, void *user_data
)
571 decoder_t
*p_dec
= (decoder_t
*)user_data
;
572 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
574 if( ev
->type
== VBI_EVENT_TTX_PAGE
)
577 msg_Info( p_dec
, "Page %03x.%02x ",
578 ev
->ev
.ttx_page
.pgno
,
579 ev
->ev
.ttx_page
.subno
& 0xFF);
581 if( p_sys
->i_last_page
== vbi_bcd2dec( ev
->ev
.ttx_page
.pgno
) )
582 p_sys
->b_update
= true;
584 if( ev
->ev
.ttx_page
.clock_update
)
585 msg_Dbg( p_dec
, "clock" );
586 if( ev
->ev
.ttx_page
.header_update
)
587 msg_Dbg( p_dec
, "header" );
590 else if( ev
->type
== VBI_EVENT_CLOSE
)
591 msg_Dbg( p_dec
, "Close event" );
592 else if( ev
->type
== VBI_EVENT_CAPTION
)
593 msg_Dbg( p_dec
, "Caption line: %x", ev
->ev
.caption
.pgno
);
594 else if( ev
->type
== VBI_EVENT_NETWORK
)
596 msg_Dbg( p_dec
, "Network change");
597 vbi_network n
= ev
->ev
.network
;
598 msg_Dbg( p_dec
, "Network id:%d name: %s, call: %s ", n
.nuid
, n
.name
, n
.call
);
600 else if( ev
->type
== VBI_EVENT_TRIGGER
)
601 msg_Dbg( p_dec
, "Trigger event" );
602 else if( ev
->type
== VBI_EVENT_ASPECT
)
603 msg_Dbg( p_dec
, "Aspect update" );
604 else if( ev
->type
== VBI_EVENT_PROG_INFO
)
605 msg_Dbg( p_dec
, "Program info received" );
606 else if( ev
->type
== VBI_EVENT_NETWORK_ID
)
607 msg_Dbg( p_dec
, "Network ID changed" );
610 static int get_first_visible_row( vbi_char
*p_text
, int rows
, int columns
)
612 for ( int i
= 0; i
< rows
* columns
; i
++ )
614 if ( p_text
[i
].opacity
!= VBI_TRANSPARENT_SPACE
)
623 static int get_last_visible_row( vbi_char
*p_text
, int rows
, int columns
)
625 for ( int i
= rows
* columns
- 1; i
>= 0; i
-- )
627 if (p_text
[i
].opacity
!= VBI_TRANSPARENT_SPACE
)
636 static int OpaquePage( picture_t
*p_src
, const vbi_page
*p_page
,
637 const video_format_t fmt
, bool b_opaque
, const int text_offset
)
641 assert( fmt
.i_chroma
== VLC_CODEC_RGBA
);
643 /* Kludge since zvbi doesn't provide an option to specify opacity. */
644 for( y
= 0; y
< fmt
.i_height
; y
++ )
646 for( x
= 0; x
< fmt
.i_width
; x
++ )
648 const vbi_opacity opacity
= p_page
->text
[ text_offset
+ y
/10 * p_page
->columns
+ x
/12 ].opacity
;
649 const int background
= p_page
->text
[ text_offset
+ y
/10 * p_page
->columns
+ x
/12 ].background
;
650 uint32_t *p_pixel
= (uint32_t*)&p_src
->p
->p_pixels
[y
* p_src
->p
->i_pitch
+ 4*x
];
654 /* Show video instead of this character */
655 case VBI_TRANSPARENT_SPACE
:
658 /* Display foreground and background color */
659 /* To make the boxed text "closed captioning" transparent
660 * change true to false.
663 /* alpha blend video into background color */
664 case VBI_SEMI_TRANSPARENT
:
667 /* Full text transparency. only foreground color is show */
668 case VBI_TRANSPARENT_FULL
:
669 if( (*p_pixel
) == (0xff000000 | p_page
->color_map
[background
] ) )
680 static int RequestPage( vlc_object_t
*p_this
, char const *psz_cmd
,
681 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
)
683 decoder_sys_t
*p_sys
= p_data
;
684 VLC_UNUSED(p_this
); VLC_UNUSED(psz_cmd
); VLC_UNUSED(oldval
);
685 int want_navlink
= -1;
687 vlc_mutex_lock( &p_sys
->lock
);
688 switch( newval
.i_int
)
696 case ZVBI_KEY_YELLOW
:
703 want_navlink
= 5; /* #4 is SKIPPED */
707 if (want_navlink
> -1)
709 int page
= vbi_bcd2dec( p_sys
->nav_link
[want_navlink
].pgno
);
710 if (page
> 0 && page
< 999) {
711 p_sys
->i_wanted_page
= page
;
712 p_sys
->i_wanted_subpage
= p_sys
->nav_link
[want_navlink
].subno
;
715 else if( newval
.i_int
> 0 && newval
.i_int
< 999 )
717 p_sys
->i_wanted_page
= newval
.i_int
;
718 p_sys
->i_wanted_subpage
= VBI_ANY_SUBNO
;
720 vlc_mutex_unlock( &p_sys
->lock
);
725 static int Opaque( vlc_object_t
*p_this
, char const *psz_cmd
,
726 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
)
728 decoder_sys_t
*p_sys
= p_data
;
729 VLC_UNUSED(p_this
); VLC_UNUSED(psz_cmd
); VLC_UNUSED(oldval
);
731 vlc_mutex_lock( &p_sys
->lock
);
732 p_sys
->b_opaque
= newval
.b_bool
;
733 p_sys
->b_update
= true;
734 vlc_mutex_unlock( &p_sys
->lock
);
739 static int EventKey( vlc_object_t
*p_this
, char const *psz_cmd
,
740 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
)
742 decoder_t
*p_dec
= p_data
;
743 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
745 VLC_UNUSED(psz_cmd
); VLC_UNUSED(oldval
); VLC_UNUSED( p_this
);
747 /* FIXME: Capture + and - key for subpage browsing */
748 if( newval
.i_int
== '-' || newval
.i_int
== '+' )
750 vlc_mutex_lock( &p_sys
->lock
);
751 if( p_sys
->i_wanted_subpage
== VBI_ANY_SUBNO
&& newval
.i_int
== '+' )
752 p_sys
->i_wanted_subpage
= vbi_dec2bcd(1);
753 else if ( newval
.i_int
== '+' )
754 p_sys
->i_wanted_subpage
= vbi_add_bcd( p_sys
->i_wanted_subpage
, 1);
755 else if( newval
.i_int
== '-')
756 p_sys
->i_wanted_subpage
= vbi_add_bcd( p_sys
->i_wanted_subpage
, 0xF9999999); /* BCD complement - 1 */
758 if ( !vbi_bcd_digits_greater( p_sys
->i_wanted_subpage
, 0x00 ) || vbi_bcd_digits_greater( p_sys
->i_wanted_subpage
, 0x99 ) )
759 p_sys
->i_wanted_subpage
= VBI_ANY_SUBNO
;
761 msg_Info( p_dec
, "subpage: %d",
762 vbi_bcd2dec( p_sys
->i_wanted_subpage
) );
764 p_sys
->b_update
= true;
765 vlc_mutex_unlock( &p_sys
->lock
);
768 /* Capture 0-9 for page selection */
769 if( newval
.i_int
< '0' || newval
.i_int
> '9' )
772 vlc_mutex_lock( &p_sys
->lock
);
773 p_sys
->i_key
[0] = p_sys
->i_key
[1];
774 p_sys
->i_key
[1] = p_sys
->i_key
[2];
775 p_sys
->i_key
[2] = (int)(newval
.i_int
- '0');
776 msg_Info( p_dec
, "page: %c%c%c", (char)(p_sys
->i_key
[0]+'0'),
777 (char)(p_sys
->i_key
[1]+'0'), (char)(p_sys
->i_key
[2]+'0') );
781 if( p_sys
->i_key
[0] > 0 && p_sys
->i_key
[0] <= 8 &&
782 p_sys
->i_key
[1] >= 0 && p_sys
->i_key
[1] <= 9 &&
783 p_sys
->i_key
[2] >= 0 && p_sys
->i_key
[2] <= 9 )
785 i_new_page
= p_sys
->i_key
[0]*100 + p_sys
->i_key
[1]*10 + p_sys
->i_key
[2];
786 p_sys
->i_key
[0] = p_sys
->i_key
[1] = p_sys
->i_key
[2] = '*' - '0';
788 vlc_mutex_unlock( &p_sys
->lock
);
791 var_SetInteger( p_dec
, "vbi-page", i_new_page
);