1 /*****************************************************************************
2 * dvbsub.c : DVB subtitles decoder
3 * DVB subtitles encoder (developed for Anevia, www.anevia.com)
4 *****************************************************************************
5 * Copyright (C) 2003 ANEVIA
6 * Copyright (C) 2003-2009 the VideoLAN team
9 * Authors: Gildas Bazin <gbazin@videolan.org>
10 * Damien LUCAS <damien.lucas@anevia.com>
11 * Laurent Aimar <fenrir@via.ecp.fr>
12 * Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
13 * Derk-Jan Hartman <hartman #at# videolan dot org>
14 * Simon Hailes <simon _a_ screen.subtitling.com>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software Foundation, Inc.,
28 * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
29 *****************************************************************************/
31 /*****************************************************************************
35 * DVB subtitles coded as strings of characters are not handled correctly.
36 * The character codes in the string should actually be indexes referring to a
37 * character table identified in the subtitle descriptor.
39 * The spec is quite vague in this area, but what is meant is perhaps that it
40 * refers to the character index in the codepage belonging to the language
41 * specified in the subtitle descriptor. Potentially it's designed for widechar
42 * (but not for UTF-*) codepages.
43 *****************************************************************************
45 *****************************************************************************
46 * Notes on DDS (Display Definition Segment)
47 * -----------------------------------------
48 * DDS (Display Definition Segment) tells the decoder how the subtitle image
49 * relates to the video image.
50 * For SD, the subtitle image is always considered to be for display at
51 * 720x576 (although it's assumed that for NTSC, this is 720x480, this
52 * is not documented well) Also, for SD, the subtitle image is drawn 'on
53 * the glass' (i.e. after video scaling, letterbox, etc.)
54 * For 'HD' (subs marked type 0x14/0x24 in PSI), a DDS must be present,
55 * and the subs area is drawn onto the video area (scales if necessary).
56 * The DDS tells the decoder what resolution the subtitle images were
57 * intended for, and hence how to scale the subtitle images for a
58 * particular video size
59 * i.e. if HD video is presented as letterbox, the subs will be in the
60 * same place on the video as if the video was presented on an HD set
61 * indeed, if the HD video was pillarboxed by the decoder, the subs may
62 * be cut off as well as the video. The intent here is that the subs can
63 * be placed accurately on the video - something which was missed in the
66 * A DDS may also specify a window - this is where the subs images are moved so that the (0,0)
67 * origin of decode is offset.
68 ********************************************************************************************/
74 #include <vlc_common.h>
75 #include <vlc_plugin.h>
76 #include <vlc_codec.h>
81 /* #define DEBUG_DVBSUB 1 */
83 #define POSX_TEXT N_("Decoding X coordinate")
84 #define POSX_LONGTEXT N_("X coordinate of the rendered subtitle")
86 #define POSY_TEXT N_("Decoding Y coordinate")
87 #define POSY_LONGTEXT N_("Y coordinate of the rendered subtitle")
89 #define POS_TEXT N_("Subpicture position")
90 #define POS_LONGTEXT N_( \
91 "You can enforce the subpicture position on the video " \
92 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
93 "also use combinations of these values, e.g. 6=top-right).")
95 #define ENC_POSX_TEXT N_("Encoding X coordinate")
96 #define ENC_POSX_LONGTEXT N_("X coordinate of the encoded subtitle" )
97 #define ENC_POSY_TEXT N_("Encoding Y coordinate")
98 #define ENC_POSY_LONGTEXT N_("Y coordinate of the encoded subtitle" )
100 static const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
101 static const char *const ppsz_pos_descriptions[] =
102 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
103 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
105 /*****************************************************************************
107 *****************************************************************************/
108 static int Open ( vlc_object_t * );
109 static void Close( vlc_object_t * );
110 static subpicture_t *Decode( decoder_t *, block_t ** );
112 static int OpenEncoder ( vlc_object_t * );
113 static void CloseEncoder( vlc_object_t * );
114 static block_t *Encode ( encoder_t *, subpicture_t * );
117 # define DVBSUB_CFG_PREFIX "dvbsub-"
118 set_description( N_("DVB subtitles decoder") )
119 set_shortname( N_("DVB subtitles") )
120 set_capability( "decoder", 50 )
121 set_category( CAT_INPUT )
122 set_subcategory( SUBCAT_INPUT_SCODEC )
123 set_callbacks( Open, Close )
125 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, true )
126 change_integer_list( pi_pos_values, ppsz_pos_descriptions, NULL )
127 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, false )
128 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, false )
130 # define ENC_CFG_PREFIX "sout-dvbsub-"
132 set_description( N_("DVB subtitles encoder") )
133 set_capability( "encoder", 100 )
134 set_callbacks( OpenEncoder, CloseEncoder )
136 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, false )
137 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, false )
138 add_obsolete_integer( ENC_CFG_PREFIX "timeout" ) /* Suppressed since 0.8.5 */
141 static const char *const ppsz_enc_options[] = { "x", "y", NULL };
143 /****************************************************************************
145 ****************************************************************************
146 * Those structures refer closely to the ETSI 300 743 Object model
147 ****************************************************************************/
149 /* The object definition gives the position of the object in a region [7.2.5] */
150 typedef struct dvbsub_objectdef_s
158 char *psz_text; /* for string of characters objects */
160 } dvbsub_objectdef_t;
162 /* The entry in the palette CLUT */
172 /* The displays dimensions [7.2.1] */
173 typedef struct dvbsub_display_s
182 /* these values are only relevant if windowed */
191 typedef struct dvbsub_clut_s
195 dvbsub_color_t c_2b[4];
196 dvbsub_color_t c_4b[16];
197 dvbsub_color_t c_8b[256];
199 struct dvbsub_clut_s *p_next;
203 /* The Region is an aera on the image [7.2.3]
204 * with a list of the object definitions associated and a CLUT */
205 typedef struct dvbsub_region_s
220 dvbsub_objectdef_t *p_object_defs;
222 struct dvbsub_region_s *p_next;
226 /* The object definition gives the position of the object in a region */
227 typedef struct dvbsub_regiondef_s
233 } dvbsub_regiondef_t;
235 /* The page defines the list of regions [7.2.2] */
239 int i_timeout; /* in seconds */
244 dvbsub_regiondef_t *p_region_defs;
252 /* Decoder internal data */
263 dvbsub_page_t *p_page;
264 dvbsub_region_t *p_regions;
265 dvbsub_clut_t *p_cluts;
266 /* this is very small, so keep forever */
267 dvbsub_display_t display;
268 dvbsub_clut_t default_clut;
272 /* List of different SEGMENT TYPES */
273 /* According to EN 300-743, table 2 */
274 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
275 #define DVBSUB_ST_REGION_COMPOSITION 0x11
276 #define DVBSUB_ST_CLUT_DEFINITION 0x12
277 #define DVBSUB_ST_OBJECT_DATA 0x13
278 #define DVBSUB_ST_DISPLAY_DEFINITION 0x14
279 #define DVBSUB_ST_ENDOFDISPLAY 0x80
280 #define DVBSUB_ST_STUFFING 0xff
281 /* List of different OBJECT TYPES */
282 /* According to EN 300-743, table 6 */
283 #define DVBSUB_OT_BASIC_BITMAP 0x00
284 #define DVBSUB_OT_BASIC_CHAR 0x01
285 #define DVBSUB_OT_COMPOSITE_STRING 0x02
286 /* Pixel DATA TYPES */
287 /* According to EN 300-743, table 9 */
288 #define DVBSUB_DT_2BP_CODE_STRING 0x10
289 #define DVBSUB_DT_4BP_CODE_STRING 0x11
290 #define DVBSUB_DT_8BP_CODE_STRING 0x12
291 #define DVBSUB_DT_24_TABLE_DATA 0x20
292 #define DVBSUB_DT_28_TABLE_DATA 0x21
293 #define DVBSUB_DT_48_TABLE_DATA 0x22
294 #define DVBSUB_DT_END_LINE 0xf0
295 /* List of different Page Composition Segment state */
296 /* According to EN 300-743, 7.2.1 table 3 */
297 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
298 #define DVBSUB_PCS_STATE_CHANGE 0x02
300 /*****************************************************************************
302 *****************************************************************************/
303 static void decode_segment( decoder_t *, bs_t * );
304 static void decode_page_composition( decoder_t *, bs_t * );
305 static void decode_region_composition( decoder_t *, bs_t * );
306 static void decode_object( decoder_t *, bs_t * );
307 static void decode_display_definition( decoder_t *, bs_t * );
308 static void decode_clut( decoder_t *, bs_t * );
309 static void free_all( decoder_t * );
311 static void default_clut_init( decoder_t * );
312 static void default_dds_init( decoder_t * );
314 static subpicture_t *render( decoder_t * );
316 /*****************************************************************************
317 * Open: probe the decoder and return score
318 *****************************************************************************
319 * Tries to launch a decoder and return score so that the interface is able
321 *****************************************************************************/
322 static int Open( vlc_object_t *p_this )
324 decoder_t *p_dec = (decoder_t *) p_this;
325 decoder_sys_t *p_sys;
329 if( p_dec->fmt_in.i_codec != VLC_CODEC_DVBS )
334 p_dec->pf_decode_sub = Decode;
335 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
338 memset( p_sys, 0, sizeof(decoder_sys_t) );
340 p_sys->i_pts = (mtime_t) 0;
341 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
342 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
344 p_sys->p_regions = NULL;
345 p_sys->p_cluts = NULL;
346 p_sys->p_page = NULL;
348 /* configure for SD res in case DDS is not present */
349 default_dds_init( p_dec );
351 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
352 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
353 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
354 p_sys->i_spu_position = val.i_int;
355 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
356 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
357 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
359 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
360 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
361 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
364 /* Check if subpicture position was overridden */
365 p_sys->b_absolute = true;
366 p_sys->i_spu_x = p_sys->i_spu_y = 0;
368 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
370 p_sys->b_absolute = true;
371 p_sys->i_spu_x = i_posx;
372 p_sys->i_spu_y = i_posy;
375 p_dec->fmt_out.i_cat = SPU_ES;
376 p_dec->fmt_out.i_codec = 0;
378 default_clut_init( p_dec );
383 /*****************************************************************************
385 *****************************************************************************/
386 static void Close( vlc_object_t *p_this )
388 decoder_t *p_dec = (decoder_t*) p_this;
389 decoder_sys_t *p_sys = p_dec->p_sys;
391 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
392 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
393 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
399 /*****************************************************************************
401 *****************************************************************************/
402 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
404 decoder_sys_t *p_sys = p_dec->p_sys;
406 subpicture_t *p_spu = NULL;
408 if( ( pp_block == NULL ) || ( *pp_block == NULL ) ) return NULL;
412 /* configure for SD res in case DDS is not present */
413 /* a change of PTS is a good indication we must get a new DDS */
414 if (p_sys->i_pts != p_block->i_pts)
415 default_dds_init( p_dec );
417 p_sys->i_pts = p_block->i_pts;
418 if( p_sys->i_pts <= 0 )
421 /* Some DVB channels send stuffing segments in non-dated packets so
422 * don't complain too loudly. */
423 msg_Warn( p_dec, "non dated subtitle" );
425 block_Release( p_block );
429 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
431 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
433 msg_Dbg( p_dec, "invalid data identifier" );
434 block_Release( p_block );
438 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
440 msg_Dbg( p_dec, "invalid subtitle stream id" );
441 block_Release( p_block );
446 msg_Dbg( p_dec, "subtitle packet received: %"PRId64, p_sys->i_pts );
449 p_sys->b_page = false;
450 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
452 decode_segment( p_dec, &p_sys->bs );
455 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
457 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
458 block_Release( p_block );
462 /* Check if the page is to be displayed */
463 if( p_sys->p_page && p_sys->b_page )
464 p_spu = render( p_dec );
466 block_Release( p_block );
471 /* following functions are local */
473 /*****************************************************************************
474 * default_clut_init: default clut as defined in EN 300-743 section 10
475 *****************************************************************************/
476 static void default_clut_init( decoder_t *p_dec )
478 decoder_sys_t *p_sys = p_dec->p_sys;
481 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
482 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
483 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
486 for( i = 0; i < 4; i++ )
488 uint8_t R = 0, G = 0, B = 0, T = 0;
490 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
491 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
492 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
493 else R = G = B = 0x7F;
495 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
496 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
497 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
498 p_sys->default_clut.c_2b[i].T = T;
501 /* 16 entries CLUT */
502 for( i = 0; i < 16; i++ )
504 uint8_t R = 0, G = 0, B = 0, T = 0;
508 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
514 R = (i & 0x1) ? 0xFF : 0;
515 G = (i & 0x2) ? 0xFF : 0;
516 B = (i & 0x4) ? 0xFF : 0;
521 R = (i & 0x1) ? 0x7F : 0;
522 G = (i & 0x2) ? 0x7F : 0;
523 B = (i & 0x4) ? 0x7F : 0;
526 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
527 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
528 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
529 p_sys->default_clut.c_4b[i].T = T;
532 /* 256 entries CLUT */
533 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
536 static void decode_segment( decoder_t *p_dec, bs_t *s )
538 decoder_sys_t *p_sys = p_dec->p_sys;
543 /* sync_byte (already checked) */
547 i_type = bs_read( s, 8 );
550 i_page_id = bs_read( s, 16 );
553 i_size = bs_show( s, 16 );
555 if( ( i_page_id != p_sys->i_id ) &&
556 ( i_page_id != p_sys->i_ancillary_id ) )
559 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
560 i_page_id, p_sys->i_id );
562 bs_skip( s, 8 * ( 2 + i_size ) );
566 if( ( p_sys->i_ancillary_id != p_sys->i_id ) &&
567 ( i_type == DVBSUB_ST_PAGE_COMPOSITION ) &&
568 ( i_page_id == p_sys->i_ancillary_id ) )
571 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
573 bs_skip( s, 8 * ( 2 + i_size ) );
578 if( i_page_id == p_sys->i_id )
579 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
581 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
586 case DVBSUB_ST_PAGE_COMPOSITION:
588 msg_Dbg( p_dec, "decode_page_composition" );
590 decode_page_composition( p_dec, s );
593 case DVBSUB_ST_REGION_COMPOSITION:
595 msg_Dbg( p_dec, "decode_region_composition" );
597 decode_region_composition( p_dec, s );
600 case DVBSUB_ST_CLUT_DEFINITION:
602 msg_Dbg( p_dec, "decode_clut" );
604 decode_clut( p_dec, s );
607 case DVBSUB_ST_OBJECT_DATA:
609 msg_Dbg( p_dec, "decode_object" );
611 decode_object( p_dec, s );
614 case DVBSUB_ST_DISPLAY_DEFINITION:
616 msg_Dbg( p_dec, "decode_display_definition" );
618 decode_display_definition( p_dec, s );
621 case DVBSUB_ST_ENDOFDISPLAY:
623 msg_Dbg( p_dec, "end of display" );
625 bs_skip( s, 8 * ( 2 + i_size ) );
628 case DVBSUB_ST_STUFFING:
630 msg_Dbg( p_dec, "skip stuffing" );
632 bs_skip( s, 8 * ( 2 + i_size ) );
636 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
637 bs_skip( s, 8 * ( 2 + i_size ) );
642 static void decode_clut( decoder_t *p_dec, bs_t *s )
644 decoder_sys_t *p_sys = p_dec->p_sys;
645 uint16_t i_segment_length;
646 uint16_t i_processed_length;
647 dvbsub_clut_t *p_clut, *p_next;
650 i_segment_length = bs_read( s, 16 );
651 i_id = bs_read( s, 8 );
652 i_version = bs_read( s, 4 );
654 /* Check if we already have this clut */
655 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
657 if( p_clut->i_id == i_id ) break;
660 /* Check version number */
661 if( p_clut && ( p_clut->i_version == i_version ) )
664 bs_skip( s, 8 * i_segment_length - 12 );
671 msg_Dbg( p_dec, "new clut: %i", i_id );
673 p_clut = malloc( sizeof( dvbsub_clut_t ) );
676 p_clut->p_next = p_sys->p_cluts;
677 p_sys->p_cluts = p_clut;
680 /* Initialize to default clut */
681 p_next = p_clut->p_next;
682 *p_clut = p_sys->default_clut;
683 p_clut->p_next = p_next;
685 /* We don't have this version of the CLUT: Parse it */
686 p_clut->i_version = i_version;
688 bs_skip( s, 4 ); /* Reserved bits */
689 i_processed_length = 2;
690 while( i_processed_length < i_segment_length )
692 uint8_t y, cb, cr, t;
696 i_id = bs_read( s, 8 );
697 i_type = bs_read( s, 3 );
701 if( bs_read( s, 1 ) )
704 cr = bs_read( s, 8 );
705 cb = bs_read( s, 8 );
707 i_processed_length += 6;
711 y = bs_read( s, 6 ) << 2;
712 cr = bs_read( s, 4 ) << 4;
713 cb = bs_read( s, 4 ) << 4;
714 t = bs_read( s, 2 ) << 6;
715 i_processed_length += 4;
718 /* We are not entirely compliant here as full transparency is indicated
719 * with a luma value of zero, not a transparency value of 0xff
720 * (full transparency would actually be 0xff + 1). */
727 /* According to EN 300-743 section 7.2.3 note 1, type should
728 * not have more than 1 bit set to one, but some streams don't
729 * respect this note. */
730 if( ( i_type & 0x04 ) && ( i_id < 4 ) )
732 p_clut->c_2b[i_id].Y = y;
733 p_clut->c_2b[i_id].Cr = cr;
734 p_clut->c_2b[i_id].Cb = cb;
735 p_clut->c_2b[i_id].T = t;
737 if( ( i_type & 0x02 ) && ( i_id < 16 ) )
739 p_clut->c_4b[i_id].Y = y;
740 p_clut->c_4b[i_id].Cr = cr;
741 p_clut->c_4b[i_id].Cb = cb;
742 p_clut->c_4b[i_id].T = t;
746 p_clut->c_8b[i_id].Y = y;
747 p_clut->c_8b[i_id].Cr = cr;
748 p_clut->c_8b[i_id].Cb = cb;
749 p_clut->c_8b[i_id].T = t;
754 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
756 decoder_sys_t *p_sys = p_dec->p_sys;
757 int i_version, i_state, i_segment_length, i_timeout, i;
759 /* A page is composed by 0 or more region */
760 i_segment_length = bs_read( s, 16 );
761 i_timeout = bs_read( s, 8 );
762 i_version = bs_read( s, 4 );
763 i_state = bs_read( s, 2 );
764 bs_skip( s, 2 ); /* Reserved */
766 if( i_state == DVBSUB_PCS_STATE_CHANGE )
768 /* End of an epoch, reset decoder buffer */
770 msg_Dbg( p_dec, "page composition mode change" );
774 else if( !p_sys->p_page && ( i_state != DVBSUB_PCS_STATE_ACQUISITION ) &&
775 ( i_state != DVBSUB_PCS_STATE_CHANGE ) )
777 /* Not a full PCS, we need to wait for one */
778 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
781 /* Try to start decoding even without an acquisition page */
782 bs_skip( s, 8 * (i_segment_length - 2) );
788 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
789 msg_Dbg( p_dec, "acquisition page composition" );
792 /* Check version number */
793 if( p_sys->p_page && ( p_sys->p_page->i_version == i_version ) )
795 bs_skip( s, 8 * (i_segment_length - 2) );
798 else if( p_sys->p_page )
800 if( p_sys->p_page->i_region_defs )
801 free( p_sys->p_page->p_region_defs );
802 p_sys->p_page->p_region_defs = NULL;
803 p_sys->p_page->i_region_defs = 0;
809 msg_Dbg( p_dec, "new page" );
811 /* Allocate a new page */
812 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
817 p_sys->p_page->i_version = i_version;
818 p_sys->p_page->i_timeout = i_timeout;
819 p_sys->b_page = true;
821 /* Number of regions */
822 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
824 if( p_sys->p_page->i_region_defs == 0 ) return;
826 p_sys->p_page->p_region_defs =
827 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
828 if( p_sys->p_page->p_region_defs )
830 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
832 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
833 bs_skip( s, 8 ); /* Reserved */
834 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
835 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
838 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
839 i, p_sys->p_page->p_region_defs[i].i_x,
840 p_sys->p_page->p_region_defs[i].i_y );
846 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
848 decoder_sys_t *p_sys = p_dec->p_sys;
849 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
850 int i_segment_length, i_processed_length, i_id, i_version;
851 int i_width, i_height, i_level_comp, i_depth, i_clut;
852 int i_8_bg, i_4_bg, i_2_bg;
855 i_segment_length = bs_read( s, 16 );
856 i_id = bs_read( s, 8 );
857 i_version = bs_read( s, 4 );
859 /* Check if we already have this region */
860 for( p_region = p_sys->p_regions; p_region != NULL;
861 p_region = p_region->p_next )
863 pp_region = &p_region->p_next;
864 if( p_region->i_id == i_id ) break;
867 /* Check version number */
868 if( p_region && ( p_region->i_version == i_version ) )
870 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
877 msg_Dbg( p_dec, "new region: %i", i_id );
879 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
882 memset( p_region, 0, sizeof(dvbsub_region_t) );
883 p_region->p_object_defs = NULL;
884 p_region->p_pixbuf = NULL;
885 p_region->p_next = NULL;
888 /* Region attributes */
889 p_region->i_id = i_id;
890 p_region->i_version = i_version;
891 b_fill = bs_read( s, 1 );
892 bs_skip( s, 3 ); /* Reserved */
894 i_width = bs_read( s, 16 );
895 i_height = bs_read( s, 16 );
897 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
899 i_level_comp = bs_read( s, 3 );
900 i_depth = bs_read( s, 3 );
901 bs_skip( s, 2 ); /* Reserved */
902 i_clut = bs_read( s, 8 );
904 i_8_bg = bs_read( s, 8 );
905 i_4_bg = bs_read( s, 4 );
906 i_2_bg = bs_read( s, 2 );
907 bs_skip( s, 2 ); /* Reserved */
909 /* Free old object defs */
910 while( p_region->i_object_defs )
911 free( p_region->p_object_defs[--p_region->i_object_defs].psz_text );
913 free( p_region->p_object_defs );
914 p_region->p_object_defs = NULL;
916 /* Extra sanity checks */
917 if( ( p_region->i_width != i_width ) ||
918 ( p_region->i_height != i_height ) )
920 if( p_region->p_pixbuf )
922 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
923 p_region->i_width, p_region->i_height, i_width, i_height );
924 free( p_region->p_pixbuf );
927 p_region->p_pixbuf = malloc( i_height * i_width );
928 p_region->i_depth = 0;
931 if( p_region->i_depth &&
932 ( ( p_region->i_depth != i_depth ) ||
933 ( p_region->i_level_comp != i_level_comp ) ||
934 ( p_region->i_clut != i_clut) ) )
936 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
939 /* Erase background of region */
942 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
943 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
944 memset( p_region->p_pixbuf, i_background, i_width * i_height );
947 p_region->i_width = i_width;
948 p_region->i_height = i_height;
949 p_region->i_level_comp = i_level_comp;
950 p_region->i_depth = i_depth;
951 p_region->i_clut = i_clut;
953 /* List of objects in the region */
954 i_processed_length = 10;
955 while( i_processed_length < i_segment_length )
957 dvbsub_objectdef_t *p_obj;
959 /* We create a new object */
960 p_region->i_object_defs++;
961 p_region->p_object_defs =
962 realloc( p_region->p_object_defs,
963 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
965 /* We parse object properties */
966 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
967 p_obj->i_id = bs_read( s, 16 );
968 p_obj->i_type = bs_read( s, 2 );
969 bs_skip( s, 2 ); /* Provider */
970 p_obj->i_x = bs_read( s, 12 );
971 bs_skip( s, 4 ); /* Reserved */
972 p_obj->i_y = bs_read( s, 12 );
973 p_obj->psz_text = NULL;
975 i_processed_length += 6;
977 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
978 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
980 p_obj->i_fg_pc = bs_read( s, 8 );
981 p_obj->i_bg_pc = bs_read( s, 8 );
982 i_processed_length += 2;
987 /* ETSI 300 743 [7.2.1] */
988 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
990 decoder_sys_t *p_sys = p_dec->p_sys;
991 uint16_t i_segment_length;
992 uint16_t i_processed_length = 40;
995 i_segment_length = bs_read( s, 16 );
996 i_version = bs_read( s, 4 );
998 /* Check version number */
999 if( p_sys->display.i_version == i_version )
1001 /* The definition did not change */
1002 bs_skip( s, 8*i_segment_length - 4 );
1007 msg_Dbg( p_dec, "new display definition: %i", i_version );
1010 /* We don't have this version of the display definition: Parse it */
1011 p_sys->display.i_version = i_version;
1012 p_sys->display.b_windowed = bs_read( s, 1 );
1013 bs_skip( s, 3 ); /* Reserved bits */
1014 p_sys->display.i_width = bs_read( s, 16 )+1;
1015 p_sys->display.i_height = bs_read( s, 16 )+1;
1017 if( p_sys->display.b_windowed )
1020 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
1022 /* Coordinates are measured from the top left corner */
1023 p_sys->display.i_x = bs_read( s, 16 );
1024 p_sys->display.i_max_x = bs_read( s, 16 );
1025 p_sys->display.i_y = bs_read( s, 16 );
1026 p_sys->display.i_max_y = bs_read( s, 16 );
1027 i_processed_length += 64;
1031 /* if not windowed, setup the window variables to good defaults */
1032 /* not necessary, but to avoid future confusion.. */
1033 p_sys->display.i_x = 0;
1034 p_sys->display.i_max_x = p_sys->display.i_width-1;
1035 p_sys->display.i_y = 0;
1036 p_sys->display.i_max_y = p_sys->display.i_height-1;
1039 if( i_processed_length != i_segment_length*8 )
1041 msg_Err( p_dec, "processed length %d bytes != segment length %d bytes",
1042 i_processed_length / 8 , i_segment_length );
1046 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1047 p_sys->display.i_version, p_sys->display.i_width, p_sys->display.i_height );
1048 if( p_sys->display.b_windowed )
1049 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1050 p_sys->display.i_x, p_sys->display.i_max_x, p_sys->display.i_y, p_sys->display.i_max_y );
1054 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1056 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1057 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1058 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1060 static void decode_object( decoder_t *p_dec, bs_t *s )
1062 decoder_sys_t *p_sys = p_dec->p_sys;
1063 dvbsub_region_t *p_region;
1064 int i_segment_length, i_coding_method, i_version, i_id, i;
1065 bool b_non_modify_color;
1067 /* ETSI 300-743 paragraph 7.2.4
1068 * sync_byte, segment_type and page_id have already been processed.
1070 i_segment_length = bs_read( s, 16 );
1071 i_id = bs_read( s, 16 );
1072 i_version = bs_read( s, 4 );
1073 i_coding_method = bs_read( s, 2 );
1075 if( i_coding_method > 1 )
1077 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1078 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1082 /* Check if the object needs to be rendered in at least one
1084 for( p_region = p_sys->p_regions; p_region != NULL;
1085 p_region = p_region->p_next )
1087 for( i = 0; i < p_region->i_object_defs; i++ )
1088 if( p_region->p_object_defs[i].i_id == i_id ) break;
1090 if( i != p_region->i_object_defs ) break;
1094 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1099 msg_Dbg( p_dec, "new object: %i", i_id );
1102 b_non_modify_color = bs_read( s, 1 );
1103 bs_skip( s, 1 ); /* Reserved */
1105 if( i_coding_method == 0x00 )
1107 int i_topfield, i_bottomfield;
1108 uint8_t *p_topfield, *p_bottomfield;
1110 i_topfield = bs_read( s, 16 );
1111 i_bottomfield = bs_read( s, 16 );
1112 p_topfield = s->p_start + bs_pos( s ) / 8;
1113 p_bottomfield = p_topfield + i_topfield;
1115 bs_skip( s, 8 * (i_segment_length - 7) );
1118 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1119 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1121 msg_Dbg( p_dec, "corrupted object data" );
1125 for( p_region = p_sys->p_regions; p_region != NULL;
1126 p_region = p_region->p_next )
1128 for( i = 0; i < p_region->i_object_defs; i++ )
1130 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1132 dvbsub_render_pdata( p_dec, p_region,
1133 p_region->p_object_defs[i].i_x,
1134 p_region->p_object_defs[i].i_y,
1135 p_topfield, i_topfield );
1139 dvbsub_render_pdata( p_dec, p_region,
1140 p_region->p_object_defs[i].i_x,
1141 p_region->p_object_defs[i].i_y + 1,
1142 p_bottomfield, i_bottomfield );
1146 /* Duplicate the top field */
1147 dvbsub_render_pdata( p_dec, p_region,
1148 p_region->p_object_defs[i].i_x,
1149 p_region->p_object_defs[i].i_y + 1,
1150 p_topfield, i_topfield );
1157 /* DVB subtitling as characters */
1158 int i_number_of_codes = bs_read( s, 8 );
1159 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1162 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1163 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1165 msg_Dbg( p_dec, "corrupted object data" );
1169 for( p_region = p_sys->p_regions; p_region != NULL;
1170 p_region = p_region->p_next )
1172 for( i = 0; i < p_region->i_object_defs; i++ )
1176 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1178 p_region->p_object_defs[i].psz_text =
1179 realloc( p_region->p_object_defs[i].psz_text,
1180 i_number_of_codes + 1 );
1182 /* FIXME 16bits -> char ??? See Preamble */
1183 for( j = 0; j < i_number_of_codes; j++ )
1185 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1187 /* Null terminate the string */
1188 p_region->p_object_defs[i].psz_text[j] = 0;
1194 msg_Dbg( p_dec, "end object: %i", i_id );
1198 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1200 uint8_t *p_field, int i_field )
1207 if( !p_region->p_pixbuf )
1209 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1212 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1213 i_x >= p_region->i_width )
1215 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1219 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1220 bs_init( &bs, p_field, i_field );
1222 while( !bs_eof( &bs ) )
1225 if( i_y >= p_region->i_height ) return;
1227 switch( bs_read( &bs, 8 ) )
1230 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1235 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1240 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1247 /* We don't use map tables */
1250 case 0xf0: /* End of line code */
1251 p_pixbuf += 2*p_region->i_width;
1252 i_offset = 0; i_y += 2;
1258 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1260 bool b_stop = false;
1262 while( !b_stop && !bs_eof( s ) )
1264 int i_count = 0, i_color = 0;
1266 i_color = bs_read( s, 2 );
1267 if( i_color != 0x00 )
1273 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1275 i_count = 3 + bs_read( s, 3 );
1276 i_color = bs_read( s, 2 );
1280 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1282 switch( bs_read( s, 2 ) ) //Switch3
1291 i_count = 12 + bs_read( s, 4 );
1292 i_color = bs_read( s, 2 );
1295 i_count = 29 + bs_read( s, 8 );
1296 i_color = bs_read( s, 2 );
1304 /* 1 pixel color 0 */
1310 if( !i_count ) continue;
1313 if( ( i_count + *pi_off ) > i_width ) break;
1315 if( i_count == 1 ) p[*pi_off] = i_color;
1316 else memset( ( p + *pi_off ), i_color, i_count );
1318 (*pi_off) += i_count;
1324 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1326 bool b_stop = false;
1328 while( !b_stop && !bs_eof( s ) )
1330 int i_count = 0, i_color = 0;
1332 i_color = bs_read( s, 4 );
1333 if( i_color != 0x00 )
1340 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1342 if( bs_show( s, 3 ) != 0x00 )
1344 i_count = 2 + bs_read( s, 3 );
1354 if( bs_read( s, 1 ) == 0x00) //Switch2
1356 i_count = 4 + bs_read( s, 2 );
1357 i_color = bs_read( s, 4 );
1361 switch ( bs_read( s, 2 ) ) //Switch3
1370 i_count = 9 + bs_read( s, 4 );
1371 i_color = bs_read( s, 4 );
1374 i_count= 25 + bs_read( s, 8 );
1375 i_color = bs_read( s, 4 );
1382 if( !i_count ) continue;
1385 if( ( i_count + *pi_off ) > i_width ) break;
1387 if( i_count == 1 ) p[*pi_off] = i_color;
1388 else memset( ( p + *pi_off ), i_color, i_count );
1390 (*pi_off) += i_count;
1396 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1398 bool b_stop = false;
1400 while( !b_stop && !bs_eof( s ) )
1402 int i_count = 0, i_color = 0;
1404 i_color = bs_read( s, 8 );
1405 if( i_color != 0x00 )
1412 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1414 if( bs_show( s, 7 ) != 0x00 )
1416 i_count = bs_read( s, 7 );
1426 i_count = bs_read( s, 7 );
1427 i_color = bs_read( s, 8 );
1431 if( !i_count ) continue;
1434 if( ( i_count + *pi_off ) > i_width ) break;
1436 if( i_count == 1 ) p[*pi_off] = i_color;
1437 else memset( ( p + *pi_off ), i_color, i_count );
1439 (*pi_off) += i_count;
1445 static void free_all( decoder_t *p_dec )
1447 decoder_sys_t *p_sys = p_dec->p_sys;
1448 dvbsub_region_t *p_reg, *p_reg_next;
1449 dvbsub_clut_t *p_clut, *p_clut_next;
1451 /*free( p_sys->p_display ); No longer malloced */
1453 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1455 p_clut_next = p_clut->p_next;
1458 p_sys->p_cluts = NULL;
1460 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1464 p_reg_next = p_reg->p_next;
1465 for( i = 0; i < p_reg->i_object_defs; i++ )
1466 free( p_reg->p_object_defs[i].psz_text );
1467 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1468 free( p_reg->p_pixbuf );
1471 p_sys->p_regions = NULL;
1475 if( p_sys->p_page->i_region_defs )
1476 free( p_sys->p_page->p_region_defs );
1477 free( p_sys->p_page );
1479 p_sys->p_page = NULL;
1482 static subpicture_t *render( decoder_t *p_dec )
1484 decoder_sys_t *p_sys = p_dec->p_sys;
1485 subpicture_t *p_spu;
1486 subpicture_region_t **pp_spu_region;
1487 int i, j, i_timeout = 0;
1491 /* Allocate the subpicture internal data. */
1492 p_spu = decoder_NewSubpicture( p_dec );
1496 p_spu->b_absolute = p_sys->b_absolute;
1497 /* Set the pf_render callback */
1498 p_spu->i_start = (mtime_t) p_sys->i_pts;
1499 //p_spu->i_stop = (mtime_t) 0;
1500 p_spu->b_ephemer = true;
1501 //p_spu->b_fade = true;
1502 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1504 /* Correct positioning of SPU */
1505 i_base_x = p_sys->i_spu_x;
1506 i_base_y = p_sys->i_spu_y;
1507 p_spu->i_original_picture_width = 720;
1508 p_spu->i_original_picture_height = 576;
1510 p_spu->i_original_picture_width = p_sys->display.i_width;
1511 p_spu->i_original_picture_height = p_sys->display.i_height;
1513 if( p_sys->display.b_windowed )
1515 /* From en_300743v01 - */
1516 /* the DDS is there to indicate intended size/position of text */
1517 /* the intended video area is ->i_width/height */
1518 /* the window is within this... SO... we should leave i_original_picture_width etc. as is */
1519 /* and ONLY change i_base_x. effectively i_max_x/y are only there to limit memory requirements*/
1520 /* we COULD use the upper limits to limit rendering to within these? */
1522 /* see notes on DDS at the top of the file */
1523 i_base_x += p_sys->display.i_x;
1524 i_base_y += p_sys->display.i_y;
1527 pp_spu_region = &p_spu->p_region;
1529 /* Loop on region definitions */
1532 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1535 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1537 dvbsub_region_t *p_region;
1538 dvbsub_regiondef_t *p_regiondef;
1539 dvbsub_clut_t *p_clut;
1540 dvbsub_color_t *p_color;
1541 subpicture_region_t *p_spu_region;
1542 uint8_t *p_src, *p_dst;
1544 video_palette_t palette;
1547 i_timeout = p_sys->p_page->i_timeout;
1549 p_regiondef = &p_sys->p_page->p_region_defs[i];
1551 /* Find associated region */
1552 for( p_region = p_sys->p_regions; p_region != NULL;
1553 p_region = p_region->p_next )
1555 if( p_regiondef->i_id == p_region->i_id ) break;
1559 /* if a region exists, then print it's size */
1562 msg_Dbg( p_dec, "rendering region %i (%i,%i) to (%i,%i)", i,
1563 p_regiondef->i_x, p_regiondef->i_y,
1564 p_regiondef->i_x + p_region->i_width,
1565 p_regiondef->i_y + p_region->i_height );
1569 msg_Dbg( p_dec, "rendering region %i (%i,%i) (no region matched to render)", i,
1570 p_regiondef->i_x, p_regiondef->i_y );
1576 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1580 /* Find associated CLUT */
1581 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1583 if( p_region->i_clut == p_clut->i_id ) break;
1587 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1591 /* FIXME: don't create a subpicture region with VLC CODEC YUVP
1592 * when it actually is a TEXT region */
1594 /* Create new SPU region */
1595 memset( &fmt, 0, sizeof(video_format_t) );
1596 fmt.i_chroma = VLC_CODEC_YUVP;
1597 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1598 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1599 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1600 fmt.i_x_offset = fmt.i_y_offset = 0;
1601 fmt.p_palette = &palette;
1602 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1603 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1604 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1605 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1606 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1608 fmt.p_palette->palette[j][0] = p_color[j].Y;
1609 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1610 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1611 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1614 p_spu_region = subpicture_region_New( &fmt );
1617 msg_Err( p_dec, "cannot allocate SPU region" );
1620 p_spu_region->i_x = i_base_x + p_regiondef->i_x;
1621 p_spu_region->i_y = i_base_y + p_regiondef->i_y;
1622 p_spu_region->i_align = p_sys->i_spu_position;
1623 *pp_spu_region = p_spu_region;
1624 pp_spu_region = &p_spu_region->p_next;
1626 p_src = p_region->p_pixbuf;
1627 p_dst = p_spu_region->p_picture->Y_PIXELS;
1628 i_pitch = p_spu_region->p_picture->Y_PITCH;
1630 /* Copy pixel buffer */
1631 for( j = 0; j < p_region->i_height; j++ )
1633 memcpy( p_dst, p_src, p_region->i_width );
1634 p_src += p_region->i_width;
1638 /* Check subtitles encoded as strings of characters
1639 * (since there are not rendered in the pixbuffer) */
1640 for( j = 0; j < p_region->i_object_defs; j++ )
1642 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1644 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1647 /* Create new SPU region */
1648 memset( &fmt, 0, sizeof(video_format_t) );
1649 fmt.i_chroma = VLC_CODEC_TEXT;
1650 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1651 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1652 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1653 fmt.i_x_offset = fmt.i_y_offset = 0;
1654 p_spu_region = subpicture_region_New( &fmt );
1657 msg_Err( p_dec, "cannot allocate SPU region" );
1661 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1662 p_spu_region->i_x = i_base_x + p_regiondef->i_x + p_object_def->i_x;
1663 p_spu_region->i_y = i_base_y + p_regiondef->i_y + p_object_def->i_y;
1664 p_spu_region->i_align = p_sys->i_spu_position;
1665 *pp_spu_region = p_spu_region;
1666 pp_spu_region = &p_spu_region->p_next;
1673 /*****************************************************************************
1674 * encoder_sys_t : encoder descriptor
1675 *****************************************************************************/
1676 typedef struct encoder_region_t
1683 struct encoder_sys_t
1685 unsigned int i_page_ver;
1686 unsigned int i_region_ver;
1687 unsigned int i_clut_ver;
1690 encoder_region_t *p_regions;
1694 /* subpicture positioning */
1699 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1700 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1701 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1702 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1704 /*****************************************************************************
1705 * OpenEncoder: probe the encoder and return score
1706 *****************************************************************************/
1707 static int OpenEncoder( vlc_object_t *p_this )
1709 encoder_t *p_enc = (encoder_t *)p_this;
1710 encoder_sys_t *p_sys;
1713 if( ( p_enc->fmt_out.i_codec != VLC_CODEC_DVBS ) &&
1716 return VLC_EGENERIC;
1719 /* Allocate the memory needed to store the decoder's structure */
1720 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1722 p_enc->p_sys = p_sys;
1724 p_enc->pf_encode_sub = Encode;
1725 p_enc->fmt_out.i_codec = VLC_CODEC_DVBS;
1726 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1728 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1730 p_sys->i_page_ver = 0;
1731 p_sys->i_region_ver = 0;
1732 p_sys->i_clut_ver = 0;
1733 p_sys->i_regions = 0;
1734 p_sys->p_regions = 0;
1736 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1737 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1738 p_sys->i_offset_x = val.i_int;
1739 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1740 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1741 p_sys->i_offset_y = val.i_int;
1746 /* FIXME: this routine is a hack to convert VLC_CODEC_YUVA
1747 * into VLC_CODEC_YUVP
1749 static subpicture_t *YuvaYuvp( subpicture_t *p_subpic )
1751 subpicture_region_t *p_region = NULL;
1753 if( !p_subpic ) return NULL;
1755 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1757 video_format_t *p_fmt = &p_region->fmt;
1758 int i = 0, j = 0, n = 0, p = 0;
1759 int i_max_entries = 256;
1761 #ifdef RANDOM_DITHERING
1762 int i_seed = 0xdeadbeef; /* random seed */
1766 int i_pixels = p_region->p_picture->p[0].i_visible_lines
1767 * p_region->p_picture->p[0].i_pitch;
1768 int i_iterator = p_region->p_picture->p[0].i_visible_lines * 3 / 4
1769 * p_region->p_picture->p[0].i_pitch
1770 + p_region->p_picture->p[0].i_pitch * 1 / 3;
1771 int i_tolerance = 0;
1773 #ifdef DEBUG_DVBSUB1
1774 /* p_enc not valid here */
1775 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1777 p_fmt->i_chroma = VLC_CODEC_YUVP;
1778 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1779 if( !p_fmt->p_palette ) break;
1780 p_fmt->p_palette->i_entries = 0;
1782 /* Find best iterator using Euclide’s algorithm */
1783 for( ; i_iterator > 1 ; i_iterator-- )
1802 /* Count colors, build best palette */
1803 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1805 bool b_success = true;
1806 p_fmt->p_palette->i_entries = 0;
1808 for( i = 0; i < i_pixels ; )
1811 y = p_region->p_picture->p[0].p_pixels[i];
1812 u = p_region->p_picture->p[1].p_pixels[i];
1813 v = p_region->p_picture->p[2].p_pixels[i];
1814 a = p_region->p_picture->p[3].p_pixels[i];
1815 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1817 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1818 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1819 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1820 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1825 if( j == p_fmt->p_palette->i_entries )
1827 p_fmt->p_palette->palette[j][0] = y;
1828 p_fmt->p_palette->palette[j][1] = u;
1829 p_fmt->p_palette->palette[j][2] = v;
1830 p_fmt->p_palette->palette[j][3] = a;
1831 p_fmt->p_palette->i_entries++;
1833 if( p_fmt->p_palette->i_entries >= i_max_entries )
1851 #ifdef DEBUG_DVBSUB1
1852 /* p_enc not valid here */
1853 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1856 #ifndef RANDOM_DITHERING
1857 pi_delta = malloc( ( p_region->p_picture->p[0].i_pitch + 1 )
1858 * sizeof(int) * 4 );
1859 for( i = 0; i < (p_region->p_picture->p[0].i_pitch + 1) * 4 ; i++ )
1865 /* Fill image with our new colours */
1866 for( p = 0; p < p_region->p_picture->p[0].i_visible_lines ; p++ )
1868 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1870 for( n = 0; n < p_region->p_picture->p[0].i_pitch ; n++ )
1872 int i_offset = p * p_region->p_picture->p[0].i_pitch + n;
1874 int i_mindist, i_best;
1876 y = (int)p_region->p_picture->p[0].p_pixels[i_offset];
1877 u = (int)p_region->p_picture->p[1].p_pixels[i_offset];
1878 v = (int)p_region->p_picture->p[2].p_pixels[i_offset];
1879 a = (int)p_region->p_picture->p[3].p_pixels[i_offset];
1881 /* Add dithering compensation */
1882 #ifdef RANDOM_DITHERING
1883 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1884 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1885 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1886 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1888 y += i_ydelta + pi_delta[ n * 4 ];
1889 u += i_udelta + pi_delta[ n * 4 + 1 ];
1890 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1891 a += i_adelta + pi_delta[ n * 4 + 3 ];
1894 /* Find best colour in palette */
1895 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1899 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1900 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1901 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1902 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1904 if( i_dist < i_mindist )
1911 /* Set pixel to best color */
1912 p_region->p_picture->p[0].p_pixels[i_offset] = i_best;
1914 /* Update dithering state */
1915 #ifdef RANDOM_DITHERING
1916 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1918 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1919 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1920 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1921 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1922 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1923 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1924 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1925 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1926 i_ydelta = i_ydelta * 5 / 8;
1927 i_udelta = i_udelta * 5 / 8;
1928 i_vdelta = i_vdelta * 5 / 8;
1929 i_adelta = i_adelta * 5 / 8;
1933 #ifndef RANDOM_DITHERING
1938 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1940 p_fmt->p_palette->palette[i][0] = 0;
1941 p_fmt->p_palette->palette[i][1] = 0;
1942 p_fmt->p_palette->palette[i][2] = 0;
1943 p_fmt->p_palette->palette[i][3] = 0;
1945 p_fmt->p_palette->i_entries = i_max_entries;
1946 #ifdef DEBUG_DVBSUB1
1947 /* p_enc not valid here */
1948 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1954 /****************************************************************************
1955 * Encode: the whole thing
1956 ****************************************************************************/
1957 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1959 subpicture_t *p_temp = NULL;
1960 subpicture_region_t *p_region = NULL;
1961 bs_t bits, *s = &bits;
1964 if( !p_subpic || !p_subpic->p_region ) return NULL;
1966 /* FIXME: this is a hack to convert VLC_CODEC_YUVA into
1969 p_region = p_subpic->p_region;
1970 if( p_region->fmt.i_chroma == VLC_CODEC_YUVA )
1972 p_temp = YuvaYuvp( p_subpic );
1975 msg_Err( p_enc, "no picture in subpicture" );
1978 p_region = p_subpic->p_region;
1982 if( !p_region ) return NULL;
1984 if( ( p_region->fmt.i_chroma != VLC_CODEC_TEXT ) &&
1985 ( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) )
1988 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1989 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1990 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1994 if( p_region->fmt.p_palette )
1996 switch( p_region->fmt.p_palette->i_entries )
2004 msg_Err( p_enc, "subpicture palette (%d) not handled",
2005 p_region->fmt.p_palette->i_entries );
2012 msg_Dbg( p_enc, "encoding subpicture" );
2014 p_block = block_New( p_enc, 64000 );
2015 bs_init( s, p_block->p_buffer, p_block->i_buffer );
2017 bs_write( s, 8, 0x20 ); /* Data identifier */
2018 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
2020 encode_page_composition( p_enc, s, p_subpic );
2021 encode_region_composition( p_enc, s, p_subpic );
2022 encode_clut( p_enc, s, p_subpic );
2023 encode_object( p_enc, s, p_subpic );
2025 /* End of display */
2026 bs_write( s, 8, 0x0f ); /* Sync byte */
2027 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
2028 bs_write( s, 16, 1 ); /* Page id */
2029 bs_write( s, 16, 0 ); /* Segment length */
2031 bs_write( s, 8, 0xff );/* End marker */
2032 p_block->i_buffer = bs_pos( s ) / 8;
2033 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
2034 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
2036 block_t *p_block_stop;
2038 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
2040 /* Send another (empty) subtitle to signal the end of display */
2041 p_block_stop = block_New( p_enc, 64000 );
2042 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
2043 bs_write( s, 8, 0x20 ); /* Data identifier */
2044 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
2045 encode_page_composition( p_enc, s, 0 );
2046 bs_write( s, 8, 0x0f ); /* Sync byte */
2047 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
2048 bs_write( s, 16, 1 ); /* Page id */
2049 bs_write( s, 16, 0 ); /* Segment length */
2050 bs_write( s, 8, 0xff );/* End marker */
2051 p_block_stop->i_buffer = bs_pos( s ) / 8;
2052 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
2053 block_ChainAppend( &p_block, p_block_stop );
2054 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2057 msg_Dbg( p_enc, "subpicture encoded properly" );
2062 /*****************************************************************************
2063 * CloseEncoder: encoder destruction
2064 *****************************************************************************/
2065 static void CloseEncoder( vlc_object_t *p_this )
2067 encoder_t *p_enc = (encoder_t *)p_this;
2068 encoder_sys_t *p_sys = p_enc->p_sys;
2070 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2071 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2072 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2074 if( p_sys->i_regions ) free( p_sys->p_regions );
2078 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2079 subpicture_t *p_subpic )
2081 encoder_sys_t *p_sys = p_enc->p_sys;
2082 subpicture_region_t *p_region;
2083 bool b_mode_change = false;
2084 int i_regions, i_timeout;
2086 bs_write( s, 8, 0x0f ); /* Sync byte */
2087 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2088 bs_write( s, 16, 1 ); /* Page id */
2090 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2091 p_region; p_region = p_region->p_next, i_regions++ )
2093 if( i_regions >= p_sys->i_regions )
2095 encoder_region_t region;
2096 region.i_width = region.i_height = 0;
2098 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2099 (p_sys->i_regions + 1) );
2100 p_sys->p_regions[p_sys->i_regions++] = region;
2103 if( ( p_sys->p_regions[i_regions].i_width <
2104 (int)p_region->fmt.i_visible_width ) ||
2105 ( p_sys->p_regions[i_regions].i_width >
2106 (int)p_region->fmt.i_visible_width ) )
2108 b_mode_change = true;
2109 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2110 i_regions, p_sys->p_regions[i_regions].i_width,
2111 p_region->fmt.i_visible_width );
2112 p_sys->p_regions[i_regions].i_width =
2113 p_region->fmt.i_visible_width;
2115 if( p_sys->p_regions[i_regions].i_height <
2116 (int)p_region->fmt.i_visible_height )
2118 b_mode_change = true;
2119 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2120 i_regions, p_sys->p_regions[i_regions].i_height,
2121 p_region->fmt.i_visible_height );
2122 p_sys->p_regions[i_regions].i_height =
2123 p_region->fmt.i_visible_height;
2127 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2130 if( p_subpic && !p_subpic->b_ephemer &&
2131 ( p_subpic->i_stop > p_subpic->i_start ) )
2133 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2136 bs_write( s, 8, i_timeout ); /* Timeout */
2137 bs_write( s, 4, p_sys->i_page_ver++ );
2138 bs_write( s, 2, b_mode_change ?
2139 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2140 bs_write( s, 2, 0 ); /* Reserved */
2142 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2143 p_region; p_region = p_region->p_next, i_regions++ )
2145 bs_write( s, 8, i_regions );
2146 bs_write( s, 8, 0 ); /* Reserved */
2147 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2149 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2150 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2154 bs_write( s, 16, p_region->i_x );
2155 bs_write( s, 16, p_region->i_y );
2160 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2162 encoder_sys_t *p_sys = p_enc->p_sys;
2163 subpicture_region_t *p_region = p_subpic->p_region;
2164 video_palette_t *p_pal, pal;
2168 if( !p_region ) return;
2170 if( p_region->fmt.i_chroma == VLC_CODEC_YUVP )
2172 p_pal = p_region->fmt.p_palette;
2177 for( i = 0; i < 4; i++ )
2179 pal.palette[i][0] = 0;
2180 pal.palette[i][1] = 0;
2181 pal.palette[i][2] = 0;
2182 pal.palette[i][3] = 0;
2187 bs_write( s, 8, 0x0f ); /* Sync byte */
2188 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2189 bs_write( s, 16, 1 ); /* Page id */
2191 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2192 bs_write( s, 8, 1 ); /* Clut id */
2193 bs_write( s, 4, p_sys->i_clut_ver++ );
2194 bs_write( s, 4, 0 ); /* Reserved */
2196 for( i = 0; i < p_pal->i_entries; i++ )
2198 bs_write( s, 8, i ); /* Clut entry id */
2199 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2200 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2201 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2202 bs_write( s, 4, 0 ); /* Reserved */
2203 bs_write( s, 1, 1 ); /* Full range flag */
2204 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2205 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2206 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2207 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2208 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2212 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2213 subpicture_t *p_subpic )
2215 encoder_sys_t *p_sys = p_enc->p_sys;
2216 subpicture_region_t *p_region;
2219 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2220 p_region = p_region->p_next, i_region++ )
2222 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2224 ( p_region->fmt.i_chroma == VLC_CODEC_TEXT );
2228 video_palette_t *p_pal = p_region->fmt.p_palette;
2232 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2236 i_entries = p_pal->i_entries;
2237 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2239 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2241 if( !p_pal->palette[i_bg][3] ) break;
2245 bs_write( s, 8, 0x0f ); /* Sync byte */
2246 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2247 bs_write( s, 16, 1 ); /* Page id */
2249 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2250 bs_write( s, 8, i_region );
2251 bs_write( s, 4, p_sys->i_region_ver++ );
2253 /* Region attributes */
2254 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2255 bs_write( s, 3, 0 ); /* Reserved */
2256 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2257 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2258 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2259 bs_write( s, 3, i_depth ); /* Region depth */
2260 bs_write( s, 2, 0 ); /* Reserved */
2261 bs_write( s, 8, 1 ); /* Clut id */
2262 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2263 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2264 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2265 bs_write( s, 2, 0 ); /* Reserved */
2267 /* In our implementation we only have 1 object per region */
2268 bs_write( s, 16, i_region );
2269 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2270 bs_write( s, 2, 0 ); /* object provider flag */
2271 bs_write( s, 12, 0 );/* object horizontal position */
2272 bs_write( s, 4, 0 ); /* Reserved */
2273 bs_write( s, 12, 0 );/* object vertical position */
2277 bs_write( s, 8, 1 ); /* foreground pixel code */
2278 bs_write( s, 8, 0 ); /* background pixel code */
2283 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2284 subpicture_region_t *p_region,
2287 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2289 encoder_sys_t *p_sys = p_enc->p_sys;
2290 subpicture_region_t *p_region;
2293 int i_length_pos, i_update_pos, i_pixel_data_pos;
2295 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2296 p_region = p_region->p_next, i_region++ )
2298 bs_write( s, 8, 0x0f ); /* Sync byte */
2299 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2300 bs_write( s, 16, 1 ); /* Page id */
2302 i_length_pos = bs_pos( s );
2303 bs_write( s, 16, 0 ); /* Segment length */
2304 bs_write( s, 16, i_region ); /* Object id */
2305 bs_write( s, 4, p_sys->i_region_ver++ );
2307 /* object coding method */
2308 switch( p_region->fmt.i_chroma )
2310 case VLC_CODEC_YUVP:
2311 bs_write( s, 2, 0 );
2313 case VLC_CODEC_TEXT:
2314 bs_write( s, 2, 1 );
2317 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2321 bs_write( s, 1, 0 ); /* non modifying color flag */
2322 bs_write( s, 1, 0 ); /* Reserved */
2324 if( p_region->fmt.i_chroma == VLC_CODEC_TEXT )
2328 if( !p_region->psz_text ) continue;
2330 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2332 bs_write( s, 8, i_size ); /* number of characters in string */
2333 for( i = 0; i < i_size; i++ )
2335 bs_write( s, 16, p_region->psz_text[i] );
2338 /* Update segment length */
2339 SetWBE( &s->p_start[i_length_pos/8],
2340 (bs_pos(s) - i_length_pos)/8 -2 );
2344 /* Coding of a bitmap object */
2345 i_update_pos = bs_pos( s );
2346 bs_write( s, 16, 0 ); /* topfield data block length */
2347 bs_write( s, 16, 0 ); /* bottomfield data block length */
2350 i_pixel_data_pos = bs_pos( s );
2351 encode_pixel_data( p_enc, s, p_region, true );
2352 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2353 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2356 i_pixel_data_pos = bs_pos( s );
2357 encode_pixel_data( p_enc, s, p_region, false );
2358 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2359 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2361 /* Stuffing for word alignment */
2363 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2365 /* Update segment length */
2366 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2370 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2372 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2374 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2376 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2377 subpicture_region_t *p_region,
2380 unsigned int i_line;
2383 if( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) return;
2385 /* Encode line by line */
2386 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2389 switch( p_region->fmt.p_palette->i_entries )
2395 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2396 encode_pixel_line_2bp( s, p_region, i_line );
2400 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2401 encode_pixel_line_4bp( s, p_region, i_line );
2405 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2406 encode_pixel_line_8bp( s, p_region, i_line );
2410 msg_Err( p_enc, "subpicture palette (%i) not handled",
2411 p_region->fmt.p_palette->i_entries );
2415 bs_write( s, 8, 0xf0 ); /* End of object line code */
2419 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2422 unsigned int i, i_length = 0;
2423 int i_pitch = p_region->p_picture->p->i_pitch;
2424 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2425 int i_last_pixel = p_data[0];
2427 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2429 if( ( i != p_region->fmt.i_visible_width ) &&
2430 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2436 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2438 /* 2bit/pixel code */
2440 bs_write( s, 2, i_last_pixel );
2443 bs_write( s, 2, 0 );
2444 bs_write( s, 1, 0 );
2445 bs_write( s, 1, 1 ); /* pseudo color 0 */
2454 bs_write( s, 2, i_last_pixel );
2455 bs_write( s, 2, i_last_pixel );
2459 bs_write( s, 2, 0 );
2460 bs_write( s, 1, 0 );
2461 bs_write( s, 1, 0 );
2462 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2465 else if( i_length > 2 )
2467 bs_write( s, 2, 0 );
2468 if( i_length <= 10 )
2470 bs_write( s, 1, 1 );
2471 bs_write( s, 3, i_length - 3 );
2472 bs_write( s, 2, i_last_pixel );
2476 bs_write( s, 1, 0 );
2477 bs_write( s, 1, 0 );
2479 if( i_length <= 27 )
2481 bs_write( s, 2, 2 );
2482 bs_write( s, 4, i_length - 12 );
2483 bs_write( s, 2, i_last_pixel );
2487 bs_write( s, 2, 3 );
2488 bs_write( s, 8, i_length - 29 );
2489 bs_write( s, 2, i_last_pixel );
2494 if( i == p_region->fmt.i_visible_width ) break;
2496 i_last_pixel = p_data[i];
2501 bs_write( s, 2, 0 );
2502 bs_write( s, 1, 0 );
2503 bs_write( s, 1, 0 );
2504 bs_write( s, 2, 0 );
2510 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2513 unsigned int i, i_length = 0;
2514 int i_pitch = p_region->p_picture->p->i_pitch;
2515 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2516 int i_last_pixel = p_data[0];
2518 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2520 if( i != p_region->fmt.i_visible_width &&
2521 p_data[i] == i_last_pixel && i_length != 280 )
2527 if( ( i_length == 1 ) ||
2528 ( ( i_length == 3 ) && i_last_pixel ) ||
2531 /* 4bit/pixel code */
2533 bs_write( s, 4, i_last_pixel );
2536 bs_write( s, 4, 0 );
2537 bs_write( s, 1, 1 );
2538 bs_write( s, 1, 1 );
2539 bs_write( s, 2, 0 ); /* pseudo color 0 */
2548 bs_write( s, 4, i_last_pixel );
2549 bs_write( s, 4, i_last_pixel );
2553 bs_write( s, 4, 0 );
2554 bs_write( s, 1, 1 );
2555 bs_write( s, 1, 1 );
2556 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2559 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2561 bs_write( s, 4, 0 );
2562 bs_write( s, 1, 0 );
2563 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2565 else if( i_length > 2 )
2567 bs_write( s, 4, 0 );
2568 bs_write( s, 1, 1 );
2572 bs_write( s, 1, 0 );
2573 bs_write( s, 2, i_length - 4 );
2574 bs_write( s, 4, i_last_pixel );
2578 bs_write( s, 1, 1 );
2580 if( i_length <= 24 )
2582 bs_write( s, 2, 2 );
2583 bs_write( s, 4, i_length - 9 );
2584 bs_write( s, 4, i_last_pixel );
2588 bs_write( s, 2, 3 );
2589 bs_write( s, 8, i_length - 25 );
2590 bs_write( s, 4, i_last_pixel );
2595 if( i == p_region->fmt.i_visible_width ) break;
2597 i_last_pixel = p_data[i];
2602 bs_write( s, 8, 0 );
2608 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2611 unsigned int i, i_length = 0;
2612 int i_pitch = p_region->p_picture->p->i_pitch;
2613 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2614 int i_last_pixel = p_data[0];
2616 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2618 if( ( i != p_region->fmt.i_visible_width ) &&
2619 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2625 if( ( i_length == 1 ) && i_last_pixel )
2627 /* 8bit/pixel code */
2628 bs_write( s, 8, i_last_pixel );
2630 else if( ( i_length == 2 ) && i_last_pixel )
2632 /* 8bit/pixel code */
2633 bs_write( s, 8, i_last_pixel );
2634 bs_write( s, 8, i_last_pixel );
2636 else if( i_length <= 127 )
2638 bs_write( s, 8, 0 );
2642 bs_write( s, 1, 0 );
2643 bs_write( s, 7, i_length ); /* pseudo color 0 */
2647 bs_write( s, 1, 1 );
2648 bs_write( s, 7, i_length );
2649 bs_write( s, 8, i_last_pixel );
2653 if( i == p_region->fmt.i_visible_width ) break;
2655 i_last_pixel = p_data[i];
2660 bs_write( s, 8, 0 );
2661 bs_write( s, 8, 0 );
2668 static void default_dds_init( decoder_t * p_dec )
2670 decoder_sys_t *p_sys = p_dec->p_sys;
2672 /* see notes on DDS at the top of the file */
2674 /* configure for SD res in case DDS is not present */
2675 p_sys->display.i_version = 0xff; /* an invalid version so it's always different */
2676 p_sys->display.i_width = 720;
2677 p_sys->display.i_height = 576;
2678 p_sys->display.b_windowed = false;