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) 2003-2005 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>
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
28 *****************************************************************************/
29 /*****************************************************************************
33 * DVB subtitles coded as strings of characters are not handled correctly.
34 * The character codes in the string should actually be indexes referring to a
35 * character table identified in the subtitle descriptor.
37 * The spec is quite vague in this area, but what is meant is perhaps that it
38 * refers to the character index in the codepage belonging to the language specified
39 * in the subtitle descriptor. Potentially it's designed for widechar
40 * (but not for UTF-*) codepages.
41 *****************************************************************************/
44 #include <vlc_codec.h>
49 /* #define DEBUG_DVBSUB 1 */
51 #define POSX_TEXT N_("Decoding X coordinate")
52 #define POSX_LONGTEXT N_("X coordinate of the rendered subtitle")
54 #define POSY_TEXT N_("Decoding Y coordinate")
55 #define POSY_LONGTEXT N_("Y coordinate of the rendered subtitle")
57 #define POS_TEXT N_("Subpicture position")
58 #define POS_LONGTEXT N_( \
59 "You can enforce the subpicture position on the video " \
60 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
61 "also use combinations of these values, e.g. 6=top-right).")
63 #define ENC_POSX_TEXT N_("Encoding X coordinate")
64 #define ENC_POSX_LONGTEXT N_("X coordinate of the encoded subtitle" )
65 #define ENC_POSY_TEXT N_("Encoding Y coordinate")
66 #define ENC_POSY_LONGTEXT N_("Y coordinate of the encoded subtitle" )
68 static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
69 static const char *ppsz_pos_descriptions[] =
70 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
71 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
73 /*****************************************************************************
75 *****************************************************************************/
76 static int Open ( vlc_object_t * );
77 static void Close( vlc_object_t * );
78 static subpicture_t *Decode( decoder_t *, block_t ** );
80 static int OpenEncoder ( vlc_object_t * );
81 static void CloseEncoder( vlc_object_t * );
82 static block_t *Encode ( encoder_t *, subpicture_t * );
85 # define DVBSUB_CFG_PREFIX "dvbsub-"
86 set_description( _("DVB subtitles decoder") );
87 set_capability( "decoder", 50 );
88 set_category( CAT_INPUT );
89 set_subcategory( SUBCAT_INPUT_SCODEC );
90 set_callbacks( Open, Close );
92 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, VLC_TRUE );
93 change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
94 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
95 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
97 # define ENC_CFG_PREFIX "sout-dvbsub-"
99 set_description( _("DVB subtitles encoder") );
100 set_capability( "encoder", 100 );
101 set_callbacks( OpenEncoder, CloseEncoder );
103 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, VLC_FALSE );
104 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, VLC_FALSE );
105 add_obsolete_integer( ENC_CFG_PREFIX "timeout" ); /* Suppressed since 0.8.5 */
108 static const char *ppsz_enc_options[] = { "x", "y", NULL };
110 /****************************************************************************
112 ****************************************************************************
113 * Those structures refer closely to the ETSI 300 743 Object model
114 ****************************************************************************/
116 /* The object definition gives the position of the object in a region [7.2.5] */
117 typedef struct dvbsub_objectdef_s
125 char *psz_text; /* for string of characters objects */
127 } dvbsub_objectdef_t;
129 /* The entry in the palette CLUT */
139 /* The displays dimensions [7.2.1] */
140 typedef struct dvbsub_display_s
148 vlc_bool_t b_windowed;
157 typedef struct dvbsub_clut_s
161 dvbsub_color_t c_2b[4];
162 dvbsub_color_t c_4b[16];
163 dvbsub_color_t c_8b[256];
165 struct dvbsub_clut_s *p_next;
169 /* The Region is an aera on the image [7.2.3]
170 * with a list of the object definitions associated and a CLUT */
171 typedef struct dvbsub_region_s
186 dvbsub_objectdef_t *p_object_defs;
188 struct dvbsub_region_s *p_next;
192 /* The object definition gives the position of the object in a region */
193 typedef struct dvbsub_regiondef_s
199 } dvbsub_regiondef_t;
201 /* The page defines the list of regions [7.2.2] */
205 int i_timeout; /* in seconds */
210 dvbsub_regiondef_t *p_region_defs;
218 /* Decoder internal data */
223 vlc_bool_t b_absolute;
229 dvbsub_page_t *p_page;
230 dvbsub_region_t *p_regions;
231 dvbsub_clut_t *p_cluts;
232 dvbsub_display_t *p_display;
233 dvbsub_clut_t default_clut;
237 /* List of different SEGMENT TYPES */
238 /* According to EN 300-743, table 2 */
239 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
240 #define DVBSUB_ST_REGION_COMPOSITION 0x11
241 #define DVBSUB_ST_CLUT_DEFINITION 0x12
242 #define DVBSUB_ST_OBJECT_DATA 0x13
243 #define DVBSUB_ST_DISPLAY_DEFINITION 0x14
244 #define DVBSUB_ST_ENDOFDISPLAY 0x80
245 #define DVBSUB_ST_STUFFING 0xff
246 /* List of different OBJECT TYPES */
247 /* According to EN 300-743, table 6 */
248 #define DVBSUB_OT_BASIC_BITMAP 0x00
249 #define DVBSUB_OT_BASIC_CHAR 0x01
250 #define DVBSUB_OT_COMPOSITE_STRING 0x02
251 /* Pixel DATA TYPES */
252 /* According to EN 300-743, table 9 */
253 #define DVBSUB_DT_2BP_CODE_STRING 0x10
254 #define DVBSUB_DT_4BP_CODE_STRING 0x11
255 #define DVBSUB_DT_8BP_CODE_STRING 0x12
256 #define DVBSUB_DT_24_TABLE_DATA 0x20
257 #define DVBSUB_DT_28_TABLE_DATA 0x21
258 #define DVBSUB_DT_48_TABLE_DATA 0x22
259 #define DVBSUB_DT_END_LINE 0xf0
260 /* List of different Page Composition Segment state */
261 /* According to EN 300-743, 7.2.1 table 3 */
262 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
263 #define DVBSUB_PCS_STATE_CHANGE 0x02
265 /*****************************************************************************
267 *****************************************************************************/
268 static void decode_segment( decoder_t *, bs_t * );
269 static void decode_page_composition( decoder_t *, bs_t * );
270 static void decode_region_composition( decoder_t *, bs_t * );
271 static void decode_object( decoder_t *, bs_t * );
272 static void decode_display_definition( decoder_t *, bs_t * );
273 static void decode_clut( decoder_t *, bs_t * );
274 static void free_all( decoder_t * );
276 static void default_clut_init( decoder_t * );
278 static subpicture_t *render( decoder_t * );
280 /*****************************************************************************
281 * Open: probe the decoder and return score
282 *****************************************************************************
283 * Tries to launch a decoder and return score so that the interface is able
285 *****************************************************************************/
286 static int Open( vlc_object_t *p_this )
288 decoder_t *p_dec = (decoder_t *) p_this;
289 decoder_sys_t *p_sys;
293 if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','v','b','s') )
298 p_dec->pf_decode_sub = Decode;
299 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
302 msg_Err( p_dec, "out of memory" );
305 memset( p_sys, 0, sizeof(decoder_sys_t) );
307 p_sys->i_pts = (mtime_t) 0;
308 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
309 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
311 p_sys->p_regions = NULL;
312 p_sys->p_cluts = NULL;
313 p_sys->p_page = NULL;
314 p_sys->p_display = NULL;
316 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
317 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
318 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
319 p_sys->i_spu_position = val.i_int;
320 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
321 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
322 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
324 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
325 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
326 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
329 /* Check if subpicture position was overridden */
330 p_sys->b_absolute = VLC_FALSE;
331 p_sys->i_spu_x = p_sys->i_spu_y = 0;
333 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
335 p_sys->b_absolute = VLC_TRUE;
336 p_sys->i_spu_x = i_posx;
337 p_sys->i_spu_y = i_posy;
340 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
342 default_clut_init( p_dec );
347 /*****************************************************************************
349 *****************************************************************************/
350 static void Close( vlc_object_t *p_this )
352 decoder_t *p_dec = (decoder_t*) p_this;
353 decoder_sys_t *p_sys = p_dec->p_sys;
355 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
356 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
357 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
363 /*****************************************************************************
365 *****************************************************************************/
366 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
368 decoder_sys_t *p_sys = p_dec->p_sys;
370 subpicture_t *p_spu = NULL;
372 if( ( pp_block == NULL ) || ( *pp_block == NULL ) ) return NULL;
376 p_sys->i_pts = p_block->i_pts;
377 if( p_sys->i_pts <= 0 )
380 /* Some DVB channels send stuffing segments in non-dated packets so
381 * don't complain too loudly. */
382 msg_Warn( p_dec, "non dated subtitle" );
384 block_Release( p_block );
388 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
390 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
392 msg_Dbg( p_dec, "invalid data identifier" );
393 block_Release( p_block );
397 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
399 msg_Dbg( p_dec, "invalid subtitle stream id" );
400 block_Release( p_block );
405 msg_Dbg( p_dec, "subtitle packet received: "I64Fd, p_sys->i_pts );
408 p_sys->b_page = VLC_FALSE;
409 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
411 decode_segment( p_dec, &p_sys->bs );
414 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
416 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
417 block_Release( p_block );
421 /* Check if the page is to be displayed */
422 if( p_sys->p_page && p_sys->b_page )
423 p_spu = render( p_dec );
425 block_Release( p_block );
430 /* following functions are local */
432 /*****************************************************************************
433 * default_clut_init: default clut as defined in EN 300-743 section 10
434 *****************************************************************************/
435 static void default_clut_init( decoder_t *p_dec )
437 decoder_sys_t *p_sys = p_dec->p_sys;
440 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
441 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
442 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
445 for( i = 0; i < 4; i++ )
447 uint8_t R = 0, G = 0, B = 0, T = 0;
449 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
450 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
451 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
452 else R = G = B = 0x7F;
454 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
455 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
456 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
457 p_sys->default_clut.c_2b[i].T = T;
460 /* 16 entries CLUT */
461 for( i = 0; i < 16; i++ )
463 uint8_t R = 0, G = 0, B = 0, T = 0;
467 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
473 R = (i & 0x1) ? 0xFF : 0;
474 G = (i & 0x2) ? 0xFF : 0;
475 B = (i & 0x4) ? 0xFF : 0;
480 R = (i & 0x1) ? 0x7F : 0;
481 G = (i & 0x2) ? 0x7F : 0;
482 B = (i & 0x4) ? 0x7F : 0;
485 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
486 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
487 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
488 p_sys->default_clut.c_4b[i].T = T;
491 /* 256 entries CLUT */
492 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
495 static void decode_segment( decoder_t *p_dec, bs_t *s )
497 decoder_sys_t *p_sys = p_dec->p_sys;
502 /* sync_byte (already checked) */
506 i_type = bs_read( s, 8 );
509 i_page_id = bs_read( s, 16 );
512 i_size = bs_show( s, 16 );
514 if( ( i_page_id != p_sys->i_id ) &&
515 ( i_page_id != p_sys->i_ancillary_id ) )
518 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
519 i_page_id, p_sys->i_id );
521 bs_skip( s, 8 * ( 2 + i_size ) );
525 if( ( p_sys->i_ancillary_id != p_sys->i_id ) &&
526 ( i_type == DVBSUB_ST_PAGE_COMPOSITION ) &&
527 ( i_page_id == p_sys->i_ancillary_id ) )
530 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
532 bs_skip( s, 8 * ( 2 + i_size ) );
537 if( i_page_id == p_sys->i_id )
538 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
540 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
545 case DVBSUB_ST_PAGE_COMPOSITION:
547 msg_Dbg( p_dec, "decode_page_composition" );
549 decode_page_composition( p_dec, s );
552 case DVBSUB_ST_REGION_COMPOSITION:
554 msg_Dbg( p_dec, "decode_region_composition" );
556 decode_region_composition( p_dec, s );
559 case DVBSUB_ST_CLUT_DEFINITION:
561 msg_Dbg( p_dec, "decode_clut" );
563 decode_clut( p_dec, s );
566 case DVBSUB_ST_OBJECT_DATA:
568 msg_Dbg( p_dec, "decode_object" );
570 decode_object( p_dec, s );
573 case DVBSUB_ST_DISPLAY_DEFINITION:
575 msg_Dbg( p_dec, "decode_display_definition" );
577 decode_display_definition( p_dec, s );
580 case DVBSUB_ST_ENDOFDISPLAY:
582 msg_Dbg( p_dec, "end of display" );
584 bs_skip( s, 8 * ( 2 + i_size ) );
587 case DVBSUB_ST_STUFFING:
589 msg_Dbg( p_dec, "skip stuffing" );
591 bs_skip( s, 8 * ( 2 + i_size ) );
595 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
596 bs_skip( s, 8 * ( 2 + i_size ) );
601 static void decode_clut( decoder_t *p_dec, bs_t *s )
603 decoder_sys_t *p_sys = p_dec->p_sys;
604 uint16_t i_segment_length;
605 uint16_t i_processed_length;
606 dvbsub_clut_t *p_clut, *p_next;
609 i_segment_length = bs_read( s, 16 );
610 i_id = bs_read( s, 8 );
611 i_version = bs_read( s, 4 );
613 /* Check if we already have this clut */
614 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
616 if( p_clut->i_id == i_id ) break;
619 /* Check version number */
620 if( p_clut && ( p_clut->i_version == i_version ) )
623 bs_skip( s, 8 * i_segment_length - 12 );
630 msg_Dbg( p_dec, "new clut: %i", i_id );
632 p_clut = malloc( sizeof(dvbsub_clut_t) );
633 p_clut->p_next = p_sys->p_cluts;
634 p_sys->p_cluts = p_clut;
637 /* Initialize to default clut */
638 p_next = p_clut->p_next;
639 *p_clut = p_sys->default_clut;
640 p_clut->p_next = p_next;
642 /* We don't have this version of the CLUT: Parse it */
643 p_clut->i_version = i_version;
645 bs_skip( s, 4 ); /* Reserved bits */
646 i_processed_length = 2;
647 while( i_processed_length < i_segment_length )
649 uint8_t y, cb, cr, t;
653 i_id = bs_read( s, 8 );
654 i_type = bs_read( s, 3 );
658 if( bs_read( s, 1 ) )
661 cr = bs_read( s, 8 );
662 cb = bs_read( s, 8 );
664 i_processed_length += 6;
668 y = bs_read( s, 6 ) << 2;
669 cr = bs_read( s, 4 ) << 4;
670 cb = bs_read( s, 4 ) << 4;
671 t = bs_read( s, 2 ) << 6;
672 i_processed_length += 4;
675 /* We are not entirely compliant here as full transparency is indicated
676 * with a luma value of zero, not a transparency value of 0xff
677 * (full transparency would actually be 0xff + 1). */
684 /* According to EN 300-743 section 7.2.3 note 1, type should
685 * not have more than 1 bit set to one, but some streams don't
686 * respect this note. */
687 if( ( i_type & 0x04 ) && ( i_id < 4 ) )
689 p_clut->c_2b[i_id].Y = y;
690 p_clut->c_2b[i_id].Cr = cr;
691 p_clut->c_2b[i_id].Cb = cb;
692 p_clut->c_2b[i_id].T = t;
694 if( ( i_type & 0x02 ) && ( i_id < 16 ) )
696 p_clut->c_4b[i_id].Y = y;
697 p_clut->c_4b[i_id].Cr = cr;
698 p_clut->c_4b[i_id].Cb = cb;
699 p_clut->c_4b[i_id].T = t;
703 p_clut->c_8b[i_id].Y = y;
704 p_clut->c_8b[i_id].Cr = cr;
705 p_clut->c_8b[i_id].Cb = cb;
706 p_clut->c_8b[i_id].T = t;
711 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
713 decoder_sys_t *p_sys = p_dec->p_sys;
714 int i_version, i_state, i_segment_length, i_timeout, i;
716 /* A page is composed by 0 or more region */
717 i_segment_length = bs_read( s, 16 );
718 i_timeout = bs_read( s, 8 );
719 i_version = bs_read( s, 4 );
720 i_state = bs_read( s, 2 );
721 bs_skip( s, 2 ); /* Reserved */
723 if( i_state == DVBSUB_PCS_STATE_CHANGE )
725 /* End of an epoch, reset decoder buffer */
727 msg_Dbg( p_dec, "page composition mode change" );
731 else if( !p_sys->p_page && ( i_state != DVBSUB_PCS_STATE_ACQUISITION ) &&
732 ( i_state != DVBSUB_PCS_STATE_CHANGE ) )
734 /* Not a full PCS, we need to wait for one */
735 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
738 /* Try to start decoding even without an acquisition page */
739 bs_skip( s, 8 * (i_segment_length - 2) );
745 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
746 msg_Dbg( p_dec, "acquisition page composition" );
749 /* Check version number */
750 if( p_sys->p_page && ( p_sys->p_page->i_version == i_version ) )
752 bs_skip( s, 8 * (i_segment_length - 2) );
755 else if( p_sys->p_page )
757 if( p_sys->p_page->i_region_defs )
758 free( p_sys->p_page->p_region_defs );
759 p_sys->p_page->p_region_defs = NULL;
760 p_sys->p_page->i_region_defs = 0;
766 msg_Dbg( p_dec, "new page" );
768 /* Allocate a new page */
769 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
772 p_sys->p_page->i_version = i_version;
773 p_sys->p_page->i_timeout = i_timeout;
774 p_sys->b_page = VLC_TRUE;
776 /* Number of regions */
777 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
779 if( p_sys->p_page->i_region_defs == 0 ) return;
781 p_sys->p_page->p_region_defs =
782 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
783 if( p_sys->p_page->p_region_defs )
785 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
787 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
788 bs_skip( s, 8 ); /* Reserved */
789 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
790 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
793 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
794 i, p_sys->p_page->p_region_defs[i].i_x,
795 p_sys->p_page->p_region_defs[i].i_y );
801 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
803 decoder_sys_t *p_sys = p_dec->p_sys;
804 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
805 int i_segment_length, i_processed_length, i_id, i_version;
806 int i_width, i_height, i_level_comp, i_depth, i_clut;
807 int i_8_bg, i_4_bg, i_2_bg;
810 i_segment_length = bs_read( s, 16 );
811 i_id = bs_read( s, 8 );
812 i_version = bs_read( s, 4 );
814 /* Check if we already have this region */
815 for( p_region = p_sys->p_regions; p_region != NULL;
816 p_region = p_region->p_next )
818 pp_region = &p_region->p_next;
819 if( p_region->i_id == i_id ) break;
822 /* Check version number */
823 if( p_region && ( p_region->i_version == i_version ) )
825 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
832 msg_Dbg( p_dec, "new region: %i", i_id );
834 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
837 memset( p_region, 0, sizeof(dvbsub_region_t) );
838 p_region->p_object_defs = NULL;
839 p_region->p_pixbuf = NULL;
840 p_region->p_next = NULL;
844 /* Region attributes */
845 p_region->i_id = i_id;
846 p_region->i_version = i_version;
847 b_fill = bs_read( s, 1 );
848 bs_skip( s, 3 ); /* Reserved */
850 i_width = bs_read( s, 16 );
851 i_height = bs_read( s, 16 );
853 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
855 i_level_comp = bs_read( s, 3 );
856 i_depth = bs_read( s, 3 );
857 bs_skip( s, 2 ); /* Reserved */
858 i_clut = bs_read( s, 8 );
860 i_8_bg = bs_read( s, 8 );
861 i_4_bg = bs_read( s, 4 );
862 i_2_bg = bs_read( s, 2 );
863 bs_skip( s, 2 ); /* Reserved */
865 /* Free old object defs */
866 while( p_region->i_object_defs )
868 int i = p_region->i_object_defs - 1;
869 if( p_region->p_object_defs[i].psz_text )
870 free( p_region->p_object_defs[i].psz_text );
872 free( p_region->p_object_defs );
874 p_region->i_object_defs--;
876 p_region->p_object_defs = NULL;
878 /* Extra sanity checks */
879 if( ( p_region->i_width != i_width ) ||
880 ( p_region->i_height != i_height ) )
882 if( p_region->p_pixbuf )
884 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
885 p_region->i_width, p_region->i_height, i_width, i_height );
886 free( p_region->p_pixbuf );
889 p_region->p_pixbuf = malloc( i_height * i_width );
890 p_region->i_depth = 0;
893 if( p_region->i_depth &&
894 ( ( p_region->i_depth != i_depth ) ||
895 ( p_region->i_level_comp != i_level_comp ) ||
896 ( p_region->i_clut != i_clut) ) )
898 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
901 /* Erase background of region */
904 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
905 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
906 memset( p_region->p_pixbuf, i_background, i_width * i_height );
909 p_region->i_width = i_width;
910 p_region->i_height = i_height;
911 p_region->i_level_comp = i_level_comp;
912 p_region->i_depth = i_depth;
913 p_region->i_clut = i_clut;
915 /* List of objects in the region */
916 i_processed_length = 10;
917 while( i_processed_length < i_segment_length )
919 dvbsub_objectdef_t *p_obj;
921 /* We create a new object */
922 p_region->i_object_defs++;
923 p_region->p_object_defs =
924 realloc( p_region->p_object_defs,
925 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
927 /* We parse object properties */
928 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
929 p_obj->i_id = bs_read( s, 16 );
930 p_obj->i_type = bs_read( s, 2 );
931 bs_skip( s, 2 ); /* Provider */
932 p_obj->i_x = bs_read( s, 12 );
933 bs_skip( s, 4 ); /* Reserved */
934 p_obj->i_y = bs_read( s, 12 );
937 i_processed_length += 6;
939 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
940 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
942 p_obj->i_fg_pc = bs_read( s, 8 );
943 p_obj->i_bg_pc = bs_read( s, 8 );
944 i_processed_length += 2;
949 /* ETSI 300 743 [7.2.1] */
950 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
952 decoder_sys_t *p_sys = p_dec->p_sys;
953 uint16_t i_segment_length;
954 uint16_t i_processed_length = 40;
955 dvbsub_display_t *p_display;
956 dvbsub_display_t *p_old = p_sys->p_display;
959 i_segment_length = bs_read( s, 16 );
960 i_version = bs_read( s, 4 );
962 /* Check version number */
963 if( p_old && ( p_old->i_version == i_version ) )
965 /* The definition did not change */
966 bs_skip( s, 8*i_segment_length - 4 );
971 msg_Dbg( p_dec, "new display definition: %i", i_version );
973 p_display = malloc( sizeof(dvbsub_display_t) );
976 /* We don't have this version of the display definition: Parse it */
977 p_display->i_version = i_version;
978 p_display->b_windowed = bs_read( s, 1 );
979 bs_skip( s, 3 ); /* Reserved bits */
980 p_display->i_width = bs_read( s, 16 )+1;
981 p_display->i_height = bs_read( s, 16 )+1;
983 if( p_display->b_windowed )
986 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
988 /* Coordinates are measured from the top left corner */
989 p_display->i_x = bs_read( s, 16 );
990 p_display->i_max_x = bs_read( s, 16 );
991 p_display->i_y = bs_read( s, 16 );
992 p_display->i_max_y = bs_read( s, 16 );
993 i_processed_length += 64;
997 p_sys->p_display = p_display;
998 if( p_old ) free( p_old );
1000 if( i_processed_length != i_segment_length*8 )
1002 msg_Err( p_dec, "processed length %d != segment length %d",
1003 i_processed_length, i_segment_length );
1007 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1008 p_display->i_version, p_display->i_width, p_display->i_height );
1009 if( p_display->b_windowed )
1010 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1011 p_display->i_x, p_display->i_max_x, p_display->i_y, p_display->i_max_y );
1015 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1017 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1018 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1019 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1021 static void decode_object( decoder_t *p_dec, bs_t *s )
1023 decoder_sys_t *p_sys = p_dec->p_sys;
1024 dvbsub_region_t *p_region;
1025 int i_segment_length, i_coding_method, i_version, i_id, i;
1026 vlc_bool_t b_non_modify_color;
1028 /* ETSI 300-743 paragraph 7.2.4
1029 * sync_byte, segment_type and page_id have already been processed.
1031 i_segment_length = bs_read( s, 16 );
1032 i_id = bs_read( s, 16 );
1033 i_version = bs_read( s, 4 );
1034 i_coding_method = bs_read( s, 2 );
1036 if( i_coding_method > 1 )
1038 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1039 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1043 /* Check if the object needs to be rendered in at least one
1045 for( p_region = p_sys->p_regions; p_region != NULL;
1046 p_region = p_region->p_next )
1048 for( i = 0; i < p_region->i_object_defs; i++ )
1049 if( p_region->p_object_defs[i].i_id == i_id ) break;
1051 if( i != p_region->i_object_defs ) break;
1055 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1060 msg_Dbg( p_dec, "new object: %i", i_id );
1063 b_non_modify_color = bs_read( s, 1 );
1064 bs_skip( s, 1 ); /* Reserved */
1066 if( i_coding_method == 0x00 )
1068 int i_topfield, i_bottomfield;
1069 uint8_t *p_topfield, *p_bottomfield;
1071 i_topfield = bs_read( s, 16 );
1072 i_bottomfield = bs_read( s, 16 );
1073 p_topfield = s->p_start + bs_pos( s ) / 8;
1074 p_bottomfield = p_topfield + i_topfield;
1076 bs_skip( s, 8 * (i_segment_length - 7) );
1079 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1080 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1082 msg_Dbg( p_dec, "corrupted object data" );
1086 for( p_region = p_sys->p_regions; p_region != NULL;
1087 p_region = p_region->p_next )
1089 for( i = 0; i < p_region->i_object_defs; i++ )
1091 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1093 dvbsub_render_pdata( p_dec, p_region,
1094 p_region->p_object_defs[i].i_x,
1095 p_region->p_object_defs[i].i_y,
1096 p_topfield, i_topfield );
1100 dvbsub_render_pdata( p_dec, p_region,
1101 p_region->p_object_defs[i].i_x,
1102 p_region->p_object_defs[i].i_y + 1,
1103 p_bottomfield, i_bottomfield );
1107 /* Duplicate the top field */
1108 dvbsub_render_pdata( p_dec, p_region,
1109 p_region->p_object_defs[i].i_x,
1110 p_region->p_object_defs[i].i_y + 1,
1111 p_topfield, i_topfield );
1118 /* DVB subtitling as characters */
1119 int i_number_of_codes = bs_read( s, 8 );
1120 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1123 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1124 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1126 msg_Dbg( p_dec, "corrupted object data" );
1130 for( p_region = p_sys->p_regions; p_region != NULL;
1131 p_region = p_region->p_next )
1133 for( i = 0; i < p_region->i_object_defs; i++ )
1137 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1139 p_region->p_object_defs[i].psz_text =
1140 realloc( p_region->p_object_defs[i].psz_text,
1141 i_number_of_codes + 1 );
1143 /* FIXME 16bits -> char ??? See Preamble */
1144 for( j = 0; j < i_number_of_codes; j++ )
1146 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1148 /* Null terminate the string */
1149 p_region->p_object_defs[i].psz_text[j] = 0;
1155 msg_Dbg( p_dec, "end object: %i", i_id );
1159 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1161 uint8_t *p_field, int i_field )
1168 if( !p_region->p_pixbuf )
1170 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1173 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1174 i_x >= p_region->i_width )
1176 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1180 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1181 bs_init( &bs, p_field, i_field );
1183 while( !bs_eof( &bs ) )
1186 if( i_y >= p_region->i_height ) return;
1188 switch( bs_read( &bs, 8 ) )
1191 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1196 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1201 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1208 /* We don't use map tables */
1211 case 0xf0: /* End of line code */
1212 p_pixbuf += 2*p_region->i_width;
1213 i_offset = 0; i_y += 2;
1219 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1221 vlc_bool_t b_stop = VLC_FALSE;
1223 while( !b_stop && !bs_eof( s ) )
1225 int i_count = 0, i_color = 0;
1227 i_color = bs_read( s, 2 );
1228 if( i_color != 0x00 )
1234 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1236 i_count = 3 + bs_read( s, 3 );
1237 i_color = bs_read( s, 2 );
1241 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1243 switch( bs_read( s, 2 ) ) //Switch3
1252 i_count = 12 + bs_read( s, 4 );
1253 i_color = bs_read( s, 2 );
1256 i_count = 29 + bs_read( s, 8 );
1257 i_color = bs_read( s, 2 );
1265 /* 1 pixel color 0 */
1271 if( !i_count ) continue;
1274 if( ( i_count + *pi_off ) > i_width ) break;
1276 if( i_count == 1 ) p[*pi_off] = i_color;
1277 else memset( ( p + *pi_off ), i_color, i_count );
1279 (*pi_off) += i_count;
1285 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1287 vlc_bool_t b_stop = VLC_FALSE;
1289 while( !b_stop && !bs_eof( s ) )
1291 int i_count = 0, i_color = 0;
1293 i_color = bs_read( s, 4 );
1294 if( i_color != 0x00 )
1301 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1303 if( bs_show( s, 3 ) != 0x00 )
1305 i_count = 2 + bs_read( s, 3 );
1315 if( bs_read( s, 1 ) == 0x00) //Switch2
1317 i_count = 4 + bs_read( s, 2 );
1318 i_color = bs_read( s, 4 );
1322 switch ( bs_read( s, 2 ) ) //Switch3
1331 i_count = 9 + bs_read( s, 4 );
1332 i_color = bs_read( s, 4 );
1335 i_count= 25 + bs_read( s, 8 );
1336 i_color = bs_read( s, 4 );
1343 if( !i_count ) continue;
1346 if( ( i_count + *pi_off ) > i_width ) break;
1348 if( i_count == 1 ) p[*pi_off] = i_color;
1349 else memset( ( p + *pi_off ), i_color, i_count );
1351 (*pi_off) += i_count;
1357 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1359 vlc_bool_t b_stop = VLC_FALSE;
1361 while( !b_stop && !bs_eof( s ) )
1363 int i_count = 0, i_color = 0;
1365 i_color = bs_read( s, 8 );
1366 if( i_color != 0x00 )
1373 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1375 if( bs_show( s, 7 ) != 0x00 )
1377 i_count = bs_read( s, 7 );
1387 i_count = bs_read( s, 7 );
1388 i_color = bs_read( s, 8 );
1392 if( !i_count ) continue;
1395 if( ( i_count + *pi_off ) > i_width ) break;
1397 if( i_count == 1 ) p[*pi_off] = i_color;
1398 else memset( ( p + *pi_off ), i_color, i_count );
1400 (*pi_off) += i_count;
1406 static void free_all( decoder_t *p_dec )
1408 decoder_sys_t *p_sys = p_dec->p_sys;
1409 dvbsub_region_t *p_reg, *p_reg_next;
1410 dvbsub_clut_t *p_clut, *p_clut_next;
1412 if( p_sys->p_display ) free( p_sys->p_display );
1414 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1416 p_clut_next = p_clut->p_next;
1419 p_sys->p_cluts = NULL;
1421 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1425 p_reg_next = p_reg->p_next;
1426 for( i = 0; i < p_reg->i_object_defs; i++ )
1427 if( p_reg->p_object_defs[i].psz_text )
1428 free( p_reg->p_object_defs[i].psz_text );
1429 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1430 if( p_reg->p_pixbuf ) free( p_reg->p_pixbuf );
1433 p_sys->p_regions = NULL;
1437 if( p_sys->p_page->i_region_defs )
1438 free( p_sys->p_page->p_region_defs );
1439 free( p_sys->p_page );
1441 p_sys->p_page = NULL;
1444 static subpicture_t *render( decoder_t *p_dec )
1446 decoder_sys_t *p_sys = p_dec->p_sys;
1447 subpicture_t *p_spu;
1448 subpicture_region_t **pp_spu_region;
1449 int i, j, i_timeout = 0;
1451 /* Allocate the subpicture internal data. */
1452 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1453 if( !p_spu ) return NULL;
1455 pp_spu_region = &p_spu->p_region;
1457 /* Loop on region definitions */
1460 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1463 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1465 dvbsub_region_t *p_region;
1466 dvbsub_regiondef_t *p_regiondef;
1467 dvbsub_clut_t *p_clut;
1468 dvbsub_color_t *p_color;
1469 subpicture_region_t *p_spu_region;
1470 uint8_t *p_src, *p_dst;
1474 i_timeout = p_sys->p_page->i_timeout;
1476 p_regiondef = &p_sys->p_page->p_region_defs[i];
1479 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1480 p_regiondef->i_x, p_regiondef->i_y );
1483 /* Find associated region */
1484 for( p_region = p_sys->p_regions; p_region != NULL;
1485 p_region = p_region->p_next )
1487 if( p_regiondef->i_id == p_region->i_id ) break;
1492 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1496 /* Find associated CLUT */
1497 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1499 if( p_region->i_clut == p_clut->i_id ) break;
1503 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1507 /* FIXME: don't create a subpicture region with VLC_FOURCC YUVP
1508 * when it actually is a TEXT region */
1510 /* Create new SPU region */
1511 memset( &fmt, 0, sizeof(video_format_t) );
1512 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1513 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1514 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1515 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1516 fmt.i_x_offset = fmt.i_y_offset = 0;
1517 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1520 msg_Err( p_dec, "cannot allocate SPU region" );
1523 p_spu_region->i_x = p_regiondef->i_x;
1524 p_spu_region->i_y = p_regiondef->i_y;
1525 p_spu_region->i_align = p_sys->i_spu_position;
1526 *pp_spu_region = p_spu_region;
1527 pp_spu_region = &p_spu_region->p_next;
1530 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1531 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1532 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1533 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1534 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1536 fmt.p_palette->palette[j][0] = p_color[j].Y;
1537 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1538 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1539 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1542 p_src = p_region->p_pixbuf;
1543 p_dst = p_spu_region->picture.Y_PIXELS;
1544 i_pitch = p_spu_region->picture.Y_PITCH;
1546 /* Copy pixel buffer */
1547 for( j = 0; j < p_region->i_height; j++ )
1549 memcpy( p_dst, p_src, p_region->i_width );
1550 p_src += p_region->i_width;
1554 /* Check subtitles encoded as strings of characters
1555 * (since there are not rendered in the pixbuffer) */
1556 for( j = 0; j < p_region->i_object_defs; j++ )
1558 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1560 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1563 /* Create new SPU region */
1564 memset( &fmt, 0, sizeof(video_format_t) );
1565 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
1566 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1567 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1568 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1569 fmt.i_x_offset = fmt.i_y_offset = 0;
1570 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1573 msg_Err( p_dec, "cannot allocate SPU region" );
1577 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1578 p_spu_region->i_x = p_regiondef->i_x + p_object_def->i_x;
1579 p_spu_region->i_y = p_regiondef->i_y + p_object_def->i_y;
1580 p_spu_region->i_align = p_sys->i_spu_position;
1581 *pp_spu_region = p_spu_region;
1582 pp_spu_region = &p_spu_region->p_next;
1586 /* Set the pf_render callback */
1587 p_spu->i_start = (mtime_t) p_sys->i_pts;
1588 //p_spu->i_stop = (mtime_t) 0;
1589 p_spu->b_ephemer = VLC_TRUE;
1590 p_spu->b_pausable = VLC_TRUE;
1591 //p_spu->b_fade = VLC_TRUE;
1592 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1594 /* Correct positioning of SPU */
1595 p_spu->b_absolute = p_sys->b_absolute;
1596 p_spu->i_flags = p_sys->i_spu_position;
1597 p_spu->i_x = p_sys->i_spu_x;
1598 p_spu->i_y = p_sys->i_spu_y;
1599 p_spu->i_original_picture_width = 720;
1600 p_spu->i_original_picture_height = 576;
1602 if( p_sys->p_display )
1604 p_spu->i_original_picture_width = p_sys->p_display->i_width;
1605 p_spu->i_original_picture_height = p_sys->p_display->i_height;
1607 if( p_sys->p_display->b_windowed )
1609 /* TODO: check that this actually works */
1610 p_spu->i_original_picture_width = p_sys->p_display->i_max_x - p_sys->p_display->i_x;
1611 p_spu->i_original_picture_height = p_sys->p_display->i_max_y - p_sys->p_display->i_y;
1612 p_spu->i_x += p_sys->p_display->i_x;
1613 p_spu->i_y += p_sys->p_display->i_y;
1620 /*****************************************************************************
1621 * encoder_sys_t : encoder descriptor
1622 *****************************************************************************/
1623 typedef struct encoder_region_t
1630 struct encoder_sys_t
1632 unsigned int i_page_ver;
1633 unsigned int i_region_ver;
1634 unsigned int i_clut_ver;
1637 encoder_region_t *p_regions;
1641 /* subpicture positioning */
1646 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1647 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1648 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1649 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1651 /*****************************************************************************
1652 * OpenEncoder: probe the encoder and return score
1653 *****************************************************************************/
1654 static int OpenEncoder( vlc_object_t *p_this )
1656 encoder_t *p_enc = (encoder_t *)p_this;
1657 encoder_sys_t *p_sys;
1660 if( ( p_enc->fmt_out.i_codec != VLC_FOURCC('d','v','b','s') ) &&
1663 return VLC_EGENERIC;
1666 /* Allocate the memory needed to store the decoder's structure */
1667 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1669 msg_Err( p_enc, "out of memory" );
1672 p_enc->p_sys = p_sys;
1674 p_enc->pf_encode_sub = Encode;
1675 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1676 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1678 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1680 p_sys->i_page_ver = 0;
1681 p_sys->i_region_ver = 0;
1682 p_sys->i_clut_ver = 0;
1683 p_sys->i_regions = 0;
1684 p_sys->p_regions = 0;
1686 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1687 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1688 p_sys->i_offset_x = val.i_int;
1689 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1690 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1691 p_sys->i_offset_y = val.i_int;
1696 /* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
1697 * into VLC_FOURCC('Y','U','V','P')
1699 static subpicture_t *YuvaYuvp( encoder_t *p_enc, subpicture_t *p_subpic )
1701 subpicture_region_t *p_region = NULL;
1703 if( !p_subpic ) return NULL;
1705 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1707 video_format_t *p_fmt = &p_region->fmt;
1708 int i = 0, j = 0, n = 0, p = 0;
1709 int i_max_entries = 256;
1711 #ifdef RANDOM_DITHERING
1712 int i_seed = 0xdeadbeef; /* random seed */
1716 int i_pixels = p_region->picture.p[0].i_visible_lines
1717 * p_region->picture.p[0].i_pitch;
1718 int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
1719 * p_region->picture.p[0].i_pitch
1720 + p_region->picture.p[0].i_pitch * 1 / 3;
1721 int i_tolerance = 0;
1724 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1726 p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
1727 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1728 if( !p_fmt->p_palette ) break;
1729 p_fmt->p_palette->i_entries = 0;
1731 /* Find best iterator using Euclide’s algorithm */
1732 for( ; i_iterator > 1 ; i_iterator-- )
1751 /* Count colors, build best palette */
1752 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1754 vlc_bool_t b_success = VLC_TRUE;
1755 p_fmt->p_palette->i_entries = 0;
1757 for( i = 0; i < i_pixels ; )
1760 y = p_region->picture.p[0].p_pixels[i];
1761 u = p_region->picture.p[1].p_pixels[i];
1762 v = p_region->picture.p[2].p_pixels[i];
1763 a = p_region->picture.p[3].p_pixels[i];
1764 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1766 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1767 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1768 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1769 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1774 if( j == p_fmt->p_palette->i_entries )
1776 p_fmt->p_palette->palette[j][0] = y;
1777 p_fmt->p_palette->palette[j][1] = u;
1778 p_fmt->p_palette->palette[j][2] = v;
1779 p_fmt->p_palette->palette[j][3] = a;
1780 p_fmt->p_palette->i_entries++;
1782 if( p_fmt->p_palette->i_entries >= i_max_entries )
1784 b_success = VLC_FALSE;
1801 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1804 #ifndef RANDOM_DITHERING
1805 pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
1806 * sizeof(int) * 4 );
1807 for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
1813 /* Fill image with our new colours */
1814 for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
1816 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1818 for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
1820 int i_offset = p * p_region->picture.p[0].i_pitch + n;
1822 int i_mindist, i_best;
1824 y = (int)p_region->picture.p[0].p_pixels[i_offset];
1825 u = (int)p_region->picture.p[1].p_pixels[i_offset];
1826 v = (int)p_region->picture.p[2].p_pixels[i_offset];
1827 a = (int)p_region->picture.p[3].p_pixels[i_offset];
1829 /* Add dithering compensation */
1830 #ifdef RANDOM_DITHERING
1831 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1832 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1833 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1834 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1836 y += i_ydelta + pi_delta[ n * 4 ];
1837 u += i_udelta + pi_delta[ n * 4 + 1 ];
1838 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1839 a += i_adelta + pi_delta[ n * 4 + 3 ];
1842 /* Find best colour in palette */
1843 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1847 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1848 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1849 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1850 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1852 if( i_dist < i_mindist )
1859 /* Set pixel to best color */
1860 p_region->picture.p[0].p_pixels[i_offset] = i_best;
1862 /* Update dithering state */
1863 #ifdef RANDOM_DITHERING
1864 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1866 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1867 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1868 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1869 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1870 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1871 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1872 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1873 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1874 i_ydelta = i_ydelta * 5 / 8;
1875 i_udelta = i_udelta * 5 / 8;
1876 i_vdelta = i_vdelta * 5 / 8;
1877 i_adelta = i_adelta * 5 / 8;
1881 #ifndef RANDOM_DITHERING
1886 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1888 p_fmt->p_palette->palette[i][0] = 0;
1889 p_fmt->p_palette->palette[i][1] = 0;
1890 p_fmt->p_palette->palette[i][2] = 0;
1891 p_fmt->p_palette->palette[i][3] = 0;
1893 p_fmt->p_palette->i_entries = i_max_entries;
1895 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1901 /****************************************************************************
1902 * Encode: the whole thing
1903 ****************************************************************************/
1904 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1906 subpicture_t *p_temp = NULL;
1907 subpicture_region_t *p_region = NULL;
1908 bs_t bits, *s = &bits;
1911 if( !p_subpic || !p_subpic->p_region ) return NULL;
1913 /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
1914 * VLC_FOURCC('Y','U','V','P')
1916 p_region = p_subpic->p_region;
1917 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
1919 p_temp = YuvaYuvp( p_enc, p_subpic );
1922 msg_Err( p_enc, "no picture in subpicture" );
1925 p_region = p_subpic->p_region;
1929 if( !p_region ) return NULL;
1931 if( ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) &&
1932 ( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) )
1935 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1936 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1937 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1941 if( p_region->fmt.p_palette )
1943 switch( p_region->fmt.p_palette->i_entries )
1951 msg_Err( p_enc, "subpicture palette (%d) not handled",
1952 p_region->fmt.p_palette->i_entries );
1959 msg_Dbg( p_enc, "encoding subpicture" );
1961 p_block = block_New( p_enc, 64000 );
1962 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1964 bs_write( s, 8, 0x20 ); /* Data identifier */
1965 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1967 encode_page_composition( p_enc, s, p_subpic );
1968 encode_region_composition( p_enc, s, p_subpic );
1969 encode_clut( p_enc, s, p_subpic );
1970 encode_object( p_enc, s, p_subpic );
1972 /* End of display */
1973 bs_write( s, 8, 0x0f ); /* Sync byte */
1974 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1975 bs_write( s, 16, 1 ); /* Page id */
1976 bs_write( s, 16, 0 ); /* Segment length */
1978 bs_write( s, 8, 0xff );/* End marker */
1979 p_block->i_buffer = bs_pos( s ) / 8;
1980 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1981 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
1983 block_t *p_block_stop;
1985 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1987 /* Send another (empty) subtitle to signal the end of display */
1988 p_block_stop = block_New( p_enc, 64000 );
1989 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1990 bs_write( s, 8, 0x20 ); /* Data identifier */
1991 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1992 encode_page_composition( p_enc, s, 0 );
1993 bs_write( s, 8, 0x0f ); /* Sync byte */
1994 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1995 bs_write( s, 16, 1 ); /* Page id */
1996 bs_write( s, 16, 0 ); /* Segment length */
1997 bs_write( s, 8, 0xff );/* End marker */
1998 p_block_stop->i_buffer = bs_pos( s ) / 8;
1999 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
2000 block_ChainAppend( &p_block, p_block_stop );
2001 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2004 msg_Dbg( p_enc, "subpicture encoded properly" );
2009 /*****************************************************************************
2010 * CloseEncoder: encoder destruction
2011 *****************************************************************************/
2012 static void CloseEncoder( vlc_object_t *p_this )
2014 encoder_t *p_enc = (encoder_t *)p_this;
2015 encoder_sys_t *p_sys = p_enc->p_sys;
2017 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2018 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2019 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2021 if( p_sys->i_regions ) free( p_sys->p_regions );
2025 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2026 subpicture_t *p_subpic )
2028 encoder_sys_t *p_sys = p_enc->p_sys;
2029 subpicture_region_t *p_region;
2030 vlc_bool_t b_mode_change = VLC_FALSE;
2031 int i_regions, i_timeout;
2033 bs_write( s, 8, 0x0f ); /* Sync byte */
2034 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2035 bs_write( s, 16, 1 ); /* Page id */
2037 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2038 p_region; p_region = p_region->p_next, i_regions++ )
2040 if( i_regions >= p_sys->i_regions )
2042 encoder_region_t region;
2043 region.i_width = region.i_height = 0;
2045 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2046 (p_sys->i_regions + 1) );
2047 p_sys->p_regions[p_sys->i_regions++] = region;
2050 if( ( p_sys->p_regions[i_regions].i_width <
2051 (int)p_region->fmt.i_visible_width ) ||
2052 ( p_sys->p_regions[i_regions].i_width >
2053 (int)p_region->fmt.i_visible_width ) )
2055 b_mode_change = VLC_TRUE;
2056 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2057 i_regions, p_sys->p_regions[i_regions].i_width,
2058 p_region->fmt.i_visible_width );
2059 p_sys->p_regions[i_regions].i_width =
2060 p_region->fmt.i_visible_width;
2062 if( p_sys->p_regions[i_regions].i_height <
2063 (int)p_region->fmt.i_visible_height )
2065 b_mode_change = VLC_TRUE;
2066 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2067 i_regions, p_sys->p_regions[i_regions].i_height,
2068 p_region->fmt.i_visible_height );
2069 p_sys->p_regions[i_regions].i_height =
2070 p_region->fmt.i_visible_height;
2074 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2077 if( p_subpic && !p_subpic->b_ephemer &&
2078 ( p_subpic->i_stop > p_subpic->i_start ) )
2080 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2083 bs_write( s, 8, i_timeout ); /* Timeout */
2084 bs_write( s, 4, p_sys->i_page_ver++ );
2085 bs_write( s, 2, b_mode_change ?
2086 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2087 bs_write( s, 2, 0 ); /* Reserved */
2089 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2090 p_region; p_region = p_region->p_next, i_regions++ )
2092 bs_write( s, 8, i_regions );
2093 bs_write( s, 8, 0 ); /* Reserved */
2094 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2096 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2097 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2101 bs_write( s, 16, p_subpic->i_x + p_region->i_x );
2102 bs_write( s, 16, p_subpic->i_y + p_region->i_y );
2107 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2109 encoder_sys_t *p_sys = p_enc->p_sys;
2110 subpicture_region_t *p_region = p_subpic->p_region;
2111 video_palette_t *p_pal, pal;
2115 if( !p_region ) return;
2117 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
2119 p_pal = p_region->fmt.p_palette;
2124 for( i = 0; i < 4; i++ )
2126 pal.palette[i][0] = 0;
2127 pal.palette[i][1] = 0;
2128 pal.palette[i][2] = 0;
2129 pal.palette[i][3] = 0;
2134 bs_write( s, 8, 0x0f ); /* Sync byte */
2135 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2136 bs_write( s, 16, 1 ); /* Page id */
2138 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2139 bs_write( s, 8, 1 ); /* Clut id */
2140 bs_write( s, 4, p_sys->i_clut_ver++ );
2141 bs_write( s, 4, 0 ); /* Reserved */
2143 for( i = 0; i < p_pal->i_entries; i++ )
2145 bs_write( s, 8, i ); /* Clut entry id */
2146 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2147 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2148 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2149 bs_write( s, 4, 0 ); /* Reserved */
2150 bs_write( s, 1, 1 ); /* Full range flag */
2151 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2152 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2153 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2154 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2155 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2159 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2160 subpicture_t *p_subpic )
2162 encoder_sys_t *p_sys = p_enc->p_sys;
2163 subpicture_region_t *p_region;
2166 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2167 p_region = p_region->p_next, i_region++ )
2169 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2171 ( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') );
2175 video_palette_t *p_pal = p_region->fmt.p_palette;
2179 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2183 i_entries = p_pal->i_entries;
2184 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2186 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2188 if( !p_pal->palette[i_bg][3] ) break;
2192 bs_write( s, 8, 0x0f ); /* Sync byte */
2193 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2194 bs_write( s, 16, 1 ); /* Page id */
2196 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2197 bs_write( s, 8, i_region );
2198 bs_write( s, 4, p_sys->i_region_ver++ );
2200 /* Region attributes */
2201 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2202 bs_write( s, 3, 0 ); /* Reserved */
2203 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2204 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2205 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2206 bs_write( s, 3, i_depth ); /* Region depth */
2207 bs_write( s, 2, 0 ); /* Reserved */
2208 bs_write( s, 8, 1 ); /* Clut id */
2209 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2210 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2211 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2212 bs_write( s, 2, 0 ); /* Reserved */
2214 /* In our implementation we only have 1 object per region */
2215 bs_write( s, 16, i_region );
2216 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2217 bs_write( s, 2, 0 ); /* object provider flag */
2218 bs_write( s, 12, 0 );/* object horizontal position */
2219 bs_write( s, 4, 0 ); /* Reserved */
2220 bs_write( s, 12, 0 );/* object vertical position */
2224 bs_write( s, 8, 1 ); /* foreground pixel code */
2225 bs_write( s, 8, 0 ); /* background pixel code */
2230 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2231 subpicture_region_t *p_region,
2234 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2236 encoder_sys_t *p_sys = p_enc->p_sys;
2237 subpicture_region_t *p_region;
2240 int i_length_pos, i_update_pos, i_pixel_data_pos;
2242 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2243 p_region = p_region->p_next, i_region++ )
2245 bs_write( s, 8, 0x0f ); /* Sync byte */
2246 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2247 bs_write( s, 16, 1 ); /* Page id */
2249 i_length_pos = bs_pos( s );
2250 bs_write( s, 16, 0 ); /* Segment length */
2251 bs_write( s, 16, i_region ); /* Object id */
2252 bs_write( s, 4, p_sys->i_region_ver++ );
2254 /* object coding method */
2255 switch( p_region->fmt.i_chroma )
2257 case VLC_FOURCC( 'Y','U','V','P' ):
2258 bs_write( s, 2, 0 );
2260 case VLC_FOURCC( 'T','E','X','T' ):
2261 bs_write( s, 2, 1 );
2264 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2268 bs_write( s, 1, 0 ); /* non modifying color flag */
2269 bs_write( s, 1, 0 ); /* Reserved */
2271 if( p_region->fmt.i_chroma == VLC_FOURCC( 'T','E','X','T' ) )
2275 if( !p_region->psz_text ) continue;
2277 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2279 bs_write( s, 8, i_size ); /* number of characters in string */
2280 for( i = 0; i < i_size; i++ )
2282 bs_write( s, 16, p_region->psz_text[i] );
2285 /* Update segment length */
2286 SetWBE( &s->p_start[i_length_pos/8],
2287 (bs_pos(s) - i_length_pos)/8 -2 );
2291 /* Coding of a bitmap object */
2292 i_update_pos = bs_pos( s );
2293 bs_write( s, 16, 0 ); /* topfield data block length */
2294 bs_write( s, 16, 0 ); /* bottomfield data block length */
2297 i_pixel_data_pos = bs_pos( s );
2298 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
2299 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2300 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2303 i_pixel_data_pos = bs_pos( s );
2304 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
2305 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2306 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2308 /* Stuffing for word alignment */
2310 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2312 /* Update segment length */
2313 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2317 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2318 subpicture_region_t *p_region,
2320 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2321 subpicture_region_t *p_region,
2323 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2324 subpicture_region_t *p_region,
2326 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2327 subpicture_region_t *p_region,
2330 unsigned int i_line;
2333 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
2335 /* Encode line by line */
2336 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2339 switch( p_region->fmt.p_palette->i_entries )
2345 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2346 encode_pixel_line_2bp( p_enc, s, p_region, i_line );
2350 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2351 encode_pixel_line_4bp( p_enc, s, p_region, i_line );
2355 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2356 encode_pixel_line_8bp( p_enc, s, p_region, i_line );
2360 msg_Err( p_enc, "subpicture palette (%i) not handled",
2361 p_region->fmt.p_palette->i_entries );
2365 bs_write( s, 8, 0xf0 ); /* End of object line code */
2369 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2370 subpicture_region_t *p_region,
2373 unsigned int i, i_length = 0;
2374 int i_pitch = p_region->picture.p->i_pitch;
2375 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2376 int i_last_pixel = p_data[0];
2378 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2380 if( ( i != p_region->fmt.i_visible_width ) &&
2381 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2387 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2389 /* 2bit/pixel code */
2391 bs_write( s, 2, i_last_pixel );
2394 bs_write( s, 2, 0 );
2395 bs_write( s, 1, 0 );
2396 bs_write( s, 1, 1 ); /* pseudo color 0 */
2405 bs_write( s, 2, i_last_pixel );
2406 bs_write( s, 2, i_last_pixel );
2410 bs_write( s, 2, 0 );
2411 bs_write( s, 1, 0 );
2412 bs_write( s, 1, 0 );
2413 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2416 else if( i_length > 2 )
2418 bs_write( s, 2, 0 );
2419 if( i_length <= 10 )
2421 bs_write( s, 1, 1 );
2422 bs_write( s, 3, i_length - 3 );
2423 bs_write( s, 2, i_last_pixel );
2427 bs_write( s, 1, 0 );
2428 bs_write( s, 1, 0 );
2430 if( i_length <= 27 )
2432 bs_write( s, 2, 2 );
2433 bs_write( s, 4, i_length - 12 );
2434 bs_write( s, 2, i_last_pixel );
2438 bs_write( s, 2, 3 );
2439 bs_write( s, 8, i_length - 29 );
2440 bs_write( s, 2, i_last_pixel );
2445 if( i == p_region->fmt.i_visible_width ) break;
2447 i_last_pixel = p_data[i];
2452 bs_write( s, 2, 0 );
2453 bs_write( s, 1, 0 );
2454 bs_write( s, 1, 0 );
2455 bs_write( s, 2, 0 );
2461 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2462 subpicture_region_t *p_region,
2465 unsigned int i, i_length = 0;
2466 int i_pitch = p_region->picture.p->i_pitch;
2467 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2468 int i_last_pixel = p_data[0];
2470 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2472 if( i != p_region->fmt.i_visible_width &&
2473 p_data[i] == i_last_pixel && i_length != 280 )
2479 if( ( i_length == 1 ) ||
2480 ( ( i_length == 3 ) && i_last_pixel ) ||
2483 /* 4bit/pixel code */
2485 bs_write( s, 4, i_last_pixel );
2488 bs_write( s, 4, 0 );
2489 bs_write( s, 1, 1 );
2490 bs_write( s, 1, 1 );
2491 bs_write( s, 2, 0 ); /* pseudo color 0 */
2500 bs_write( s, 4, i_last_pixel );
2501 bs_write( s, 4, i_last_pixel );
2505 bs_write( s, 4, 0 );
2506 bs_write( s, 1, 1 );
2507 bs_write( s, 1, 1 );
2508 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2511 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2513 bs_write( s, 4, 0 );
2514 bs_write( s, 1, 0 );
2515 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2517 else if( i_length > 2 )
2519 bs_write( s, 4, 0 );
2520 bs_write( s, 1, 1 );
2524 bs_write( s, 1, 0 );
2525 bs_write( s, 2, i_length - 4 );
2526 bs_write( s, 4, i_last_pixel );
2530 bs_write( s, 1, 1 );
2532 if( i_length <= 24 )
2534 bs_write( s, 2, 2 );
2535 bs_write( s, 4, i_length - 9 );
2536 bs_write( s, 4, i_last_pixel );
2540 bs_write( s, 2, 3 );
2541 bs_write( s, 8, i_length - 25 );
2542 bs_write( s, 4, i_last_pixel );
2547 if( i == p_region->fmt.i_visible_width ) break;
2549 i_last_pixel = p_data[i];
2554 bs_write( s, 8, 0 );
2560 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2561 subpicture_region_t *p_region,
2564 unsigned int i, i_length = 0;
2565 int i_pitch = p_region->picture.p->i_pitch;
2566 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2567 int i_last_pixel = p_data[0];
2569 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2571 if( ( i != p_region->fmt.i_visible_width ) &&
2572 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2578 if( ( i_length == 1 ) && i_last_pixel )
2580 /* 8bit/pixel code */
2581 bs_write( s, 8, i_last_pixel );
2583 else if( ( i_length == 2 ) && i_last_pixel )
2585 /* 8bit/pixel code */
2586 bs_write( s, 8, i_last_pixel );
2587 bs_write( s, 8, i_last_pixel );
2589 else if( i_length <= 127 )
2591 bs_write( s, 8, 0 );
2595 bs_write( s, 1, 0 );
2596 bs_write( s, 7, i_length ); /* pseudo color 0 */
2600 bs_write( s, 1, 1 );
2601 bs_write( s, 7, i_length );
2602 bs_write( s, 8, i_last_pixel );
2606 if( i == p_region->fmt.i_visible_width ) break;
2608 i_last_pixel = p_data[i];
2613 bs_write( s, 8, 0 );
2614 bs_write( s, 8, 0 );