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( "spu decoder", 51 )
98 set_category( CAT_INPUT
)
99 set_subcategory( SUBCAT_INPUT_SCODEC
)
100 set_callbacks( Open
, Close
)
102 add_integer_with_range( "vbi-page", 100, 0, 'z' << 16,
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 int 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
, vlc_tick_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
*p_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 int i_page
= var_CreateGetInteger( p_dec
, "vbi-page" );
214 msg_Warn( p_dec
, "invalid vbi-page requested");
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
= i_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" );
272 p_sys
->b_text
= var_CreateGetBool( p_dec
, "vbi-text" );
274 p_sys
->i_level
= var_CreateGetInteger( p_dec
, "vbi-level" );
276 /* Listen for keys */
277 var_AddCallback( p_dec
->obj
.libvlc
, "key-pressed", EventKey
, p_dec
);
279 p_dec
->fmt_out
.i_codec
= p_sys
->b_text
? VLC_CODEC_TEXT
: VLC_CODEC_RGBA
;
281 p_dec
->pf_decode
= Decode
;
285 /*****************************************************************************
287 *****************************************************************************/
288 static void Close( vlc_object_t
*p_this
)
290 decoder_t
*p_dec
= (decoder_t
*) p_this
;
291 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
293 var_DelCallback( p_dec
, "vbi-opaque", Opaque
, p_sys
);
294 var_DelCallback( p_dec
, "vbi-page", RequestPage
, p_sys
);
295 var_DelCallback( p_dec
->obj
.libvlc
, "key-pressed", EventKey
, p_dec
);
297 vlc_mutex_destroy( &p_sys
->lock
);
299 if( p_sys
->p_vbi_dec
)
300 vbi_decoder_delete( p_sys
->p_vbi_dec
);
304 #ifdef WORDS_BIGENDIAN
305 # define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_BE
307 # define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_LE
310 /*****************************************************************************
312 *****************************************************************************/
313 static int Decode( decoder_t
*p_dec
, block_t
*p_block
)
315 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
316 subpicture_t
*p_spu
= NULL
;
318 bool b_cached
= false;
321 if( p_block
== NULL
) /* No Drain */
322 return VLCDEC_SUCCESS
;
324 if( p_block
->i_buffer
> 0 &&
325 ( ( p_block
->p_buffer
[0] >= 0x10 && p_block
->p_buffer
[0] <= 0x1f ) ||
326 ( p_block
->p_buffer
[0] >= 0x99 && p_block
->p_buffer
[0] <= 0x9b ) ) )
328 vbi_sliced
*p_sliced
= p_sys
->p_vbi_sliced
;
329 unsigned int i_lines
= 0;
333 while( p_block
->i_buffer
>= 2 )
335 int i_id
= p_block
->p_buffer
[0];
336 unsigned i_size
= p_block
->p_buffer
[1];
338 if( 2 + i_size
> p_block
->i_buffer
)
341 if( ( i_id
== 0x02 || i_id
== 0x03 ) && i_size
>= 44 && i_lines
< MAX_SLICES
)
343 if(p_block
->p_buffer
[3] == 0xE4 ) /* framing_code */
345 unsigned line_offset
= p_block
->p_buffer
[2] & 0x1f;
346 unsigned field_parity
= p_block
->p_buffer
[2] & 0x20;
348 p_sliced
[i_lines
].id
= VBI_SLICED_TELETEXT_B
;
349 if( line_offset
> 0 )
350 p_sliced
[i_lines
].line
= line_offset
+ (field_parity
? 0 : 313);
352 p_sliced
[i_lines
].line
= 0;
353 for( int i
= 0; i
< 42; i
++ )
354 p_sliced
[i_lines
].data
[i
] = vbi_rev8( p_block
->p_buffer
[4 + i
] );
359 p_block
->i_buffer
-= 2 + i_size
;
360 p_block
->p_buffer
+= 2 + i_size
;
364 vbi_decode( p_sys
->p_vbi_dec
, p_sliced
, i_lines
, 0 );
368 vlc_mutex_lock( &p_sys
->lock
);
369 if( p_sys
->i_wanted_page
== 0 )
371 vlc_mutex_unlock( &p_sys
->lock
);
372 block_Release( p_block
);
373 return VLCDEC_SUCCESS
;
375 const int i_align
= p_sys
->i_align
;
376 const unsigned int i_wanted_page
= p_sys
->i_wanted_page
;
377 const unsigned int i_wanted_subpage
= p_sys
->i_wanted_subpage
;
378 const bool b_opaque
= p_sys
->b_opaque
;
379 const unsigned int i_level
= p_sys
->i_level
> 3 ? 3 : p_sys
->i_level
;
380 vlc_mutex_unlock( &p_sys
->lock
);
382 /* Try to see if the page we want is in the cache yet */
383 memset( &p_page
, 0, sizeof(vbi_page
) );
384 b_cached
= vbi_fetch_vt_page( p_sys
->p_vbi_dec
, &p_page
,
385 vbi_dec2bcd( i_wanted_page
),
386 i_wanted_subpage
, level_zvbi_values
[i_level
],
389 if( i_wanted_page
== p_sys
->i_last_page
&& !p_sys
->b_update
)
394 if( p_sys
->b_text
&& p_sys
->i_last_page
!= i_wanted_page
)
396 /* We need to reset the subtitle */
397 p_spu
= Subpicture( p_dec
, &fmt
, true,
398 p_page
.columns
, p_page
.rows
,
399 i_align
, p_block
->i_pts
);
402 subtext_updater_sys_t
*p_spu_sys
= p_spu
->updater
.p_sys
;
403 p_spu_sys
->region
.p_segments
= text_segment_New("");
405 p_sys
->b_update
= true;
406 p_sys
->i_last_page
= i_wanted_page
;
412 p_sys
->b_update
= false;
413 p_sys
->i_last_page
= i_wanted_page
;
415 msg_Dbg( p_dec
, "we now have page: %d ready for display",
419 /* Ignore transparent rows at the beginning and end */
420 int i_first_row
= get_first_visible_row( p_page
.text
, p_page
.rows
, p_page
.columns
);
422 if ( i_first_row
< 0 ) {
423 i_first_row
= p_page
.rows
- 1;
426 i_num_rows
= get_last_visible_row( p_page
.text
, p_page
.rows
, p_page
.columns
) - i_first_row
+ 1;
429 msg_Dbg( p_dec
, "After top and tail of page we have rows %i-%i of %i",
430 i_first_row
+ 1, i_first_row
+ i_num_rows
, p_page
.rows
);
433 /* If there is a page or sub to render, then we do that here */
434 /* Create the subpicture unit */
435 p_spu
= Subpicture( p_dec
, &fmt
, p_sys
->b_text
,
436 p_page
.columns
, i_num_rows
,
437 i_align
, p_block
->i_pts
);
443 unsigned int i_textsize
= 7000;
445 char p_text
[i_textsize
+1];
447 i_total
= vbi_print_page_region( &p_page
, p_text
, i_textsize
,
448 "UTF-8", 0, 0, 0, i_first_row
, p_page
.columns
, i_num_rows
);
450 for( offset
=1; offset
<i_total
&& isspace( p_text
[i_total
-offset
] ); offset
++)
451 p_text
[i_total
-offset
] = '\0';
456 while( offset
< i_total
&& isspace( p_text
[offset
] ) )
459 subtext_updater_sys_t
*p_spu_sys
= p_spu
->updater
.p_sys
;
460 p_spu_sys
->region
.p_segments
= text_segment_New( &p_text
[offset
] );
461 if( p_spu_sys
->region
.p_segments
&& b_opaque
)
463 p_spu_sys
->region
.p_segments
->style
= text_style_Create( STYLE_NO_DEFAULTS
);
464 if( p_spu_sys
->region
.p_segments
->style
)
466 /* Set text background */
467 p_spu_sys
->region
.p_segments
->style
->i_style_flags
= STYLE_BACKGROUND
;
468 p_spu_sys
->region
.p_segments
->style
->i_features
|= STYLE_HAS_FLAGS
;
472 p_spu_sys
->region
.inner_align
= i_align
;
473 p_spu_sys
->region
.flags
= UPDT_REGION_IGNORE_BACKGROUND
;
476 msg_Info( p_dec
, "page %x-%x(%d)\n\"%s\"", p_page
.pgno
, p_page
.subno
, i_total
, &p_text
[offset
] );
481 picture_t
*p_pic
= p_spu
->p_region
->p_picture
;
483 /* ZVBI is stupid enough to assume pitch == width */
484 p_pic
->p
->i_pitch
= 4 * fmt
.i_width
;
486 /* Maintain subtitle postion */
487 p_spu
->p_region
->i_y
= i_first_row
*10;
488 p_spu
->i_original_picture_width
= p_page
.columns
*12;
489 p_spu
->i_original_picture_height
= p_page
.rows
*10;
491 vbi_draw_vt_page_region( &p_page
, ZVBI_PIXFMT_RGBA32
,
492 p_spu
->p_region
->p_picture
->p
->p_pixels
, -1,
493 0, i_first_row
, p_page
.columns
, i_num_rows
,
496 vlc_mutex_lock( &p_sys
->lock
);
497 memcpy( p_sys
->nav_link
, &p_page
.nav_link
, sizeof( p_sys
->nav_link
)) ;
498 vlc_mutex_unlock( &p_sys
->lock
);
500 OpaquePage( p_pic
, &p_page
, &fmt
, b_opaque
, i_first_row
* p_page
.columns
);
504 vbi_unref_page( &p_page
);
505 block_Release( p_block
);
507 decoder_QueueSub( p_dec
, p_spu
);
508 return VLCDEC_SUCCESS
;
511 vbi_unref_page( &p_page
);
512 block_Release( p_block
);
513 return VLCDEC_SUCCESS
;
516 static subpicture_t
*Subpicture( decoder_t
*p_dec
, video_format_t
*p_fmt
,
518 int i_columns
, int i_rows
, int i_align
,
522 subpicture_t
*p_spu
=NULL
;
524 /* If there is a page or sub to render, then we do that here */
525 /* Create the subpicture unit */
527 p_spu
= decoder_NewSubpictureText( p_dec
);
529 p_spu
= decoder_NewSubpicture( p_dec
, NULL
);
532 msg_Warn( p_dec
, "can't get spu buffer" );
536 video_format_Init(&fmt
, b_text
? VLC_CODEC_TEXT
: VLC_CODEC_RGBA
);
539 fmt
.i_bits_per_pixel
= 0;
543 fmt
.i_width
= fmt
.i_visible_width
= i_columns
* 12;
544 fmt
.i_height
= fmt
.i_visible_height
= i_rows
* 10;
545 fmt
.i_bits_per_pixel
= 32;
546 fmt
.i_sar_num
= fmt
.i_sar_den
= 0; /* let the vout set the correct AR */
548 fmt
.i_x_offset
= fmt
.i_y_offset
= 0;
550 p_spu
->p_region
= subpicture_region_New( &fmt
);
551 if( p_spu
->p_region
== NULL
)
553 msg_Err( p_dec
, "cannot allocate SPU region" );
554 subpicture_Delete( p_spu
);
558 p_spu
->p_region
->i_x
= 0;
559 p_spu
->p_region
->i_y
= 0;
561 p_spu
->i_start
= i_pts
;
562 p_spu
->i_stop
= b_text
? i_pts
+ VLC_TICK_FROM_SEC(10): 0;
563 p_spu
->b_ephemer
= true;
564 p_spu
->b_absolute
= b_text
? false : true;
567 p_spu
->p_region
->i_align
= i_align
;
568 p_spu
->i_original_picture_width
= fmt
.i_width
;
569 p_spu
->i_original_picture_height
= fmt
.i_height
;
576 static void EventHandler( vbi_event
*ev
, void *user_data
)
578 decoder_t
*p_dec
= (decoder_t
*)user_data
;
579 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
581 if( ev
->type
== VBI_EVENT_TTX_PAGE
)
584 msg_Info( p_dec
, "Page %03x.%02x ",
585 ev
->ev
.ttx_page
.pgno
,
586 ev
->ev
.ttx_page
.subno
& 0xFF);
588 if( p_sys
->i_last_page
== vbi_bcd2dec( ev
->ev
.ttx_page
.pgno
) )
589 p_sys
->b_update
= true;
591 if( ev
->ev
.ttx_page
.clock_update
)
592 msg_Dbg( p_dec
, "clock" );
593 if( ev
->ev
.ttx_page
.header_update
)
594 msg_Dbg( p_dec
, "header" );
597 else if( ev
->type
== VBI_EVENT_CLOSE
)
598 msg_Dbg( p_dec
, "Close event" );
599 else if( ev
->type
== VBI_EVENT_CAPTION
)
600 msg_Dbg( p_dec
, "Caption line: %x", ev
->ev
.caption
.pgno
);
601 else if( ev
->type
== VBI_EVENT_NETWORK
)
603 msg_Dbg( p_dec
, "Network change");
604 vbi_network n
= ev
->ev
.network
;
605 msg_Dbg( p_dec
, "Network id:%d name: %s, call: %s ", n
.nuid
, n
.name
, n
.call
);
607 else if( ev
->type
== VBI_EVENT_TRIGGER
)
608 msg_Dbg( p_dec
, "Trigger event" );
609 else if( ev
->type
== VBI_EVENT_ASPECT
)
610 msg_Dbg( p_dec
, "Aspect update" );
611 else if( ev
->type
== VBI_EVENT_PROG_INFO
)
612 msg_Dbg( p_dec
, "Program info received" );
613 else if( ev
->type
== VBI_EVENT_NETWORK_ID
)
614 msg_Dbg( p_dec
, "Network ID changed" );
617 static int get_first_visible_row( vbi_char
*p_text
, int rows
, int columns
)
619 for ( int i
= 0; i
< rows
* columns
; i
++ )
621 if ( p_text
[i
].opacity
!= VBI_TRANSPARENT_SPACE
)
630 static int get_last_visible_row( vbi_char
*p_text
, int rows
, int columns
)
632 for ( int i
= rows
* columns
- 1; i
>= 0; i
-- )
634 if (p_text
[i
].opacity
!= VBI_TRANSPARENT_SPACE
)
643 static int OpaquePage( picture_t
*p_src
, const vbi_page
*p_page
,
644 const video_format_t
*p_fmt
, bool b_opaque
, const int text_offset
)
648 assert( p_fmt
->i_chroma
== VLC_CODEC_RGBA
);
650 /* Kludge since zvbi doesn't provide an option to specify opacity. */
651 for( y
= 0; y
< p_fmt
->i_height
; y
++ )
653 for( x
= 0; x
< p_fmt
->i_width
; x
++ )
655 const vbi_opacity opacity
= p_page
->text
[ text_offset
+ y
/10 * p_page
->columns
+ x
/12 ].opacity
;
656 const int background
= p_page
->text
[ text_offset
+ y
/10 * p_page
->columns
+ x
/12 ].background
;
657 uint32_t *p_pixel
= (uint32_t*)&p_src
->p
->p_pixels
[y
* p_src
->p
->i_pitch
+ 4*x
];
661 /* Show video instead of this character */
662 case VBI_TRANSPARENT_SPACE
:
665 /* Display foreground and background color */
666 /* To make the boxed text "closed captioning" transparent
667 * change true to false.
670 /* alpha blend video into background color */
671 case VBI_SEMI_TRANSPARENT
:
674 /* Full text transparency. only foreground color is show */
675 case VBI_TRANSPARENT_FULL
:
676 if( (*p_pixel
) == (0xff000000 | p_page
->color_map
[background
] ) )
687 static int RequestPage( vlc_object_t
*p_this
, char const *psz_cmd
,
688 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
)
690 decoder_sys_t
*p_sys
= p_data
;
691 VLC_UNUSED(p_this
); VLC_UNUSED(psz_cmd
); VLC_UNUSED(oldval
);
692 int want_navlink
= -1;
694 vlc_mutex_lock( &p_sys
->lock
);
695 switch( newval
.i_int
)
703 case ZVBI_KEY_YELLOW
:
710 want_navlink
= 5; /* #4 is SKIPPED */
714 if (want_navlink
> -1)
716 int page
= vbi_bcd2dec( p_sys
->nav_link
[want_navlink
].pgno
);
717 if (page
> 0 && page
< 999) {
718 p_sys
->i_wanted_page
= page
;
719 p_sys
->i_wanted_subpage
= p_sys
->nav_link
[want_navlink
].subno
;
722 else if( newval
.i_int
>= 0 && newval
.i_int
< 999 )
724 p_sys
->i_wanted_page
= newval
.i_int
;
725 p_sys
->i_wanted_subpage
= VBI_ANY_SUBNO
;
727 vlc_mutex_unlock( &p_sys
->lock
);
732 static int Opaque( vlc_object_t
*p_this
, char const *psz_cmd
,
733 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
)
735 decoder_sys_t
*p_sys
= p_data
;
736 VLC_UNUSED(p_this
); VLC_UNUSED(psz_cmd
); VLC_UNUSED(oldval
);
738 vlc_mutex_lock( &p_sys
->lock
);
739 p_sys
->b_opaque
= newval
.b_bool
;
740 p_sys
->b_update
= true;
741 vlc_mutex_unlock( &p_sys
->lock
);
746 static int EventKey( vlc_object_t
*p_this
, char const *psz_cmd
,
747 vlc_value_t oldval
, vlc_value_t newval
, void *p_data
)
749 decoder_t
*p_dec
= p_data
;
750 decoder_sys_t
*p_sys
= p_dec
->p_sys
;
752 VLC_UNUSED(psz_cmd
); VLC_UNUSED(oldval
); VLC_UNUSED( p_this
);
754 /* FIXME: Capture + and - key for subpage browsing */
755 if( newval
.i_int
== '-' || newval
.i_int
== '+' )
757 vlc_mutex_lock( &p_sys
->lock
);
758 if( p_sys
->i_wanted_subpage
== VBI_ANY_SUBNO
&& newval
.i_int
== '+' )
759 p_sys
->i_wanted_subpage
= vbi_dec2bcd(1);
760 else if ( newval
.i_int
== '+' )
761 p_sys
->i_wanted_subpage
= vbi_add_bcd( p_sys
->i_wanted_subpage
, 1);
762 else if( newval
.i_int
== '-')
763 p_sys
->i_wanted_subpage
= vbi_add_bcd( p_sys
->i_wanted_subpage
, 0xF9999999); /* BCD complement - 1 */
765 if ( !vbi_bcd_digits_greater( p_sys
->i_wanted_subpage
, 0x00 ) || vbi_bcd_digits_greater( p_sys
->i_wanted_subpage
, 0x99 ) )
766 p_sys
->i_wanted_subpage
= VBI_ANY_SUBNO
;
768 msg_Info( p_dec
, "subpage: %d",
769 vbi_bcd2dec( p_sys
->i_wanted_subpage
) );
771 p_sys
->b_update
= true;
772 vlc_mutex_unlock( &p_sys
->lock
);
775 /* Capture 0-9 for page selection */
776 if( newval
.i_int
< '0' || newval
.i_int
> '9' )
779 vlc_mutex_lock( &p_sys
->lock
);
780 p_sys
->i_key
[0] = p_sys
->i_key
[1];
781 p_sys
->i_key
[1] = p_sys
->i_key
[2];
782 p_sys
->i_key
[2] = (int)(newval
.i_int
- '0');
783 msg_Info( p_dec
, "page: %c%c%c", (char)(p_sys
->i_key
[0]+'0'),
784 (char)(p_sys
->i_key
[1]+'0'), (char)(p_sys
->i_key
[2]+'0') );
788 if( p_sys
->i_key
[0] > 0 && p_sys
->i_key
[0] <= 8 &&
789 p_sys
->i_key
[1] >= 0 && p_sys
->i_key
[1] <= 9 &&
790 p_sys
->i_key
[2] >= 0 && p_sys
->i_key
[2] <= 9 )
792 i_new_page
= p_sys
->i_key
[0]*100 + p_sys
->i_key
[1]*10 + p_sys
->i_key
[2];
793 p_sys
->i_key
[0] = p_sys
->i_key
[1] = p_sys
->i_key
[2] = '*' - '0';
795 vlc_mutex_unlock( &p_sys
->lock
);
798 var_SetInteger( p_dec
, "vbi-page", i_new_page
);