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) );
300 memset( p_sys, 0, sizeof(decoder_sys_t) );
302 p_sys->i_pts = (mtime_t) 0;
303 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
304 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
306 p_sys->p_regions = NULL;
307 p_sys->p_cluts = NULL;
308 p_sys->p_page = NULL;
309 p_sys->p_display = NULL;
311 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
312 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
313 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
314 p_sys->i_spu_position = val.i_int;
315 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
316 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
317 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
319 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
320 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
321 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
324 /* Check if subpicture position was overridden */
325 p_sys->b_absolute = VLC_TRUE;
326 p_sys->i_spu_x = p_sys->i_spu_y = 0;
328 if( i_posx >= 0 && i_posy >= 0 )
330 p_sys->b_absolute = VLC_FALSE;
331 p_sys->i_spu_x = i_posx;
332 p_sys->i_spu_y = i_posy;
335 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
337 default_clut_init( p_dec );
342 /*****************************************************************************
344 *****************************************************************************/
345 static void Close( vlc_object_t *p_this )
347 decoder_t *p_dec = (decoder_t*) p_this;
348 decoder_sys_t *p_sys = p_dec->p_sys;
350 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
351 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
352 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
358 /*****************************************************************************
360 *****************************************************************************/
361 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
363 decoder_sys_t *p_sys = p_dec->p_sys;
365 subpicture_t *p_spu = NULL;
367 if( pp_block == NULL || *pp_block == NULL ) return NULL;
371 p_sys->i_pts = p_block->i_pts;
372 if( p_sys->i_pts <= 0 )
375 /* Some DVB channels send stuffing segments in non-dated packets so
376 * don't complain too loudly. */
377 msg_Warn( p_dec, "non dated subtitle" );
379 block_Release( p_block );
383 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
385 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
387 msg_Dbg( p_dec, "invalid data identifier" );
388 block_Release( p_block );
392 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
394 msg_Dbg( p_dec, "invalid subtitle stream id" );
395 block_Release( p_block );
400 msg_Dbg( p_dec, "subtitle packet received: "I64Fd, p_sys->i_pts );
403 p_sys->b_page = VLC_FALSE;
404 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
406 decode_segment( p_dec, &p_sys->bs );
409 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
411 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
412 block_Release( p_block );
416 /* Check if the page is to be displayed */
417 if( p_sys->p_page && p_sys->b_page ) p_spu = render( p_dec );
419 block_Release( p_block );
424 /* following functions are local */
426 /*****************************************************************************
427 * default_clut_init: default clut as defined in EN 300-743 section 10
428 *****************************************************************************/
429 static void default_clut_init( decoder_t *p_dec )
431 decoder_sys_t *p_sys = p_dec->p_sys;
434 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
435 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
436 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
439 for( i = 0; i < 4; i++ )
441 uint8_t R = 0, G = 0, B = 0, T = 0;
443 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
444 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
445 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
446 else R = G = B = 0x7F;
448 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
449 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
450 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
451 p_sys->default_clut.c_2b[i].T = T;
454 /* 16 entries CLUT */
455 for( i = 0; i < 16; i++ )
457 uint8_t R = 0, G = 0, B = 0, T = 0;
461 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
467 R = (i & 0x1) ? 0xFF : 0;
468 G = (i & 0x2) ? 0xFF : 0;
469 B = (i & 0x4) ? 0xFF : 0;
474 R = (i & 0x1) ? 0x7F : 0;
475 G = (i & 0x2) ? 0x7F : 0;
476 B = (i & 0x4) ? 0x7F : 0;
479 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
480 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
481 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
482 p_sys->default_clut.c_4b[i].T = T;
485 /* 256 entries CLUT */
486 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
489 static void decode_segment( decoder_t *p_dec, bs_t *s )
491 decoder_sys_t *p_sys = p_dec->p_sys;
496 /* sync_byte (already checked) */
500 i_type = bs_read( s, 8 );
503 i_page_id = bs_read( s, 16 );
506 i_size = bs_show( s, 16 );
508 if( i_page_id != p_sys->i_id && i_page_id != p_sys->i_ancillary_id )
511 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
512 i_page_id, p_sys->i_id );
514 bs_skip( s, 8 * ( 2 + i_size ) );
518 if( p_sys->i_ancillary_id != p_sys->i_id &&
519 i_type == DVBSUB_ST_PAGE_COMPOSITION &&
520 i_page_id == p_sys->i_ancillary_id )
523 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
525 bs_skip( s, 8 * ( 2 + i_size ) );
530 if( i_page_id == p_sys->i_id )
531 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
533 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
538 case DVBSUB_ST_PAGE_COMPOSITION:
540 msg_Dbg( p_dec, "decode_page_composition" );
542 decode_page_composition( p_dec, s );
545 case DVBSUB_ST_REGION_COMPOSITION:
547 msg_Dbg( p_dec, "decode_region_composition" );
549 decode_region_composition( p_dec, s );
552 case DVBSUB_ST_CLUT_DEFINITION:
554 msg_Dbg( p_dec, "decode_clut" );
556 decode_clut( p_dec, s );
559 case DVBSUB_ST_OBJECT_DATA:
561 msg_Dbg( p_dec, "decode_object" );
563 decode_object( p_dec, s );
566 case DVBSUB_ST_DISPLAY_DEFINITION:
568 msg_Dbg( p_dec, "decode_display_definition" );
570 decode_display_definition( p_dec, s );
573 case DVBSUB_ST_ENDOFDISPLAY:
575 msg_Dbg( p_dec, "end of display" );
577 bs_skip( s, 8 * ( 2 + i_size ) );
580 case DVBSUB_ST_STUFFING:
582 msg_Dbg( p_dec, "skip stuffing" );
584 bs_skip( s, 8 * ( 2 + i_size ) );
588 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
589 bs_skip( s, 8 * ( 2 + i_size ) );
594 static void decode_clut( decoder_t *p_dec, bs_t *s )
596 decoder_sys_t *p_sys = p_dec->p_sys;
597 uint16_t i_segment_length;
598 uint16_t i_processed_length;
599 dvbsub_clut_t *p_clut, *p_next;
602 i_segment_length = bs_read( s, 16 );
603 i_id = bs_read( s, 8 );
604 i_version = bs_read( s, 4 );
606 /* Check if we already have this clut */
607 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
609 if( p_clut->i_id == i_id ) break;
612 /* Check version number */
613 if( p_clut && p_clut->i_version == i_version )
616 bs_skip( s, 8 * i_segment_length - 12 );
623 msg_Dbg( p_dec, "new clut: %i", i_id );
625 p_clut = malloc( sizeof(dvbsub_clut_t) );
626 p_clut->p_next = p_sys->p_cluts;
627 p_sys->p_cluts = p_clut;
630 /* Initialize to default clut */
631 p_next = p_clut->p_next;
632 *p_clut = p_sys->default_clut;
633 p_clut->p_next = p_next;
635 /* We don't have this version of the CLUT: Parse it */
636 p_clut->i_version = i_version;
638 bs_skip( s, 4 ); /* Reserved bits */
639 i_processed_length = 2;
640 while( i_processed_length < i_segment_length )
642 uint8_t y, cb, cr, t;
646 i_id = bs_read( s, 8 );
647 i_type = bs_read( s, 3 );
651 if( bs_read( s, 1 ) )
654 cr = bs_read( s, 8 );
655 cb = bs_read( s, 8 );
657 i_processed_length += 6;
661 y = bs_read( s, 6 ) << 2;
662 cr = bs_read( s, 4 ) << 4;
663 cb = bs_read( s, 4 ) << 4;
664 t = bs_read( s, 2 ) << 6;
665 i_processed_length += 4;
668 /* We are not entirely compliant here as full transparency is indicated
669 * with a luma value of zero, not a transparency value of 0xff
670 * (full transparency would actually be 0xff + 1). */
677 /* According to EN 300-743 section 7.2.3 note 1, type should
678 * not have more than 1 bit set to one, but some streams don't
679 * respect this note. */
680 if( i_type & 0x04 && i_id < 4 )
682 p_clut->c_2b[i_id].Y = y;
683 p_clut->c_2b[i_id].Cr = cr;
684 p_clut->c_2b[i_id].Cb = cb;
685 p_clut->c_2b[i_id].T = t;
687 if( i_type & 0x02 && i_id < 16 )
689 p_clut->c_4b[i_id].Y = y;
690 p_clut->c_4b[i_id].Cr = cr;
691 p_clut->c_4b[i_id].Cb = cb;
692 p_clut->c_4b[i_id].T = t;
696 p_clut->c_8b[i_id].Y = y;
697 p_clut->c_8b[i_id].Cr = cr;
698 p_clut->c_8b[i_id].Cb = cb;
699 p_clut->c_8b[i_id].T = t;
704 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
706 decoder_sys_t *p_sys = p_dec->p_sys;
707 int i_version, i_state, i_segment_length, i_timeout, i;
709 /* A page is composed by 0 or more region */
710 i_segment_length = bs_read( s, 16 );
711 i_timeout = bs_read( s, 8 );
712 i_version = bs_read( s, 4 );
713 i_state = bs_read( s, 2 );
714 bs_skip( s, 2 ); /* Reserved */
716 if( i_state == DVBSUB_PCS_STATE_CHANGE )
718 /* End of an epoch, reset decoder buffer */
720 msg_Dbg( p_dec, "page composition mode change" );
724 else if( !p_sys->p_page && i_state != DVBSUB_PCS_STATE_ACQUISITION &&
725 i_state != DVBSUB_PCS_STATE_CHANGE )
727 /* Not a full PCS, we need to wait for one */
728 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
731 /* Try to start decoding even without an acquisition page */
732 bs_skip( s, 8 * (i_segment_length - 2) );
738 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
739 msg_Dbg( p_dec, "acquisition page composition" );
742 /* Check version number */
743 if( p_sys->p_page && p_sys->p_page->i_version == i_version )
745 bs_skip( s, 8 * (i_segment_length - 2) );
748 else if( p_sys->p_page )
750 if( p_sys->p_page->i_region_defs )
751 free( p_sys->p_page->p_region_defs );
752 p_sys->p_page->i_region_defs = 0;
758 msg_Dbg( p_dec, "new page" );
760 /* Allocate a new page */
761 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
764 p_sys->p_page->i_version = i_version;
765 p_sys->p_page->i_timeout = i_timeout;
766 p_sys->b_page = VLC_TRUE;
768 /* Number of regions */
769 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
771 if( p_sys->p_page->i_region_defs == 0 ) return;
773 p_sys->p_page->p_region_defs =
774 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
775 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
777 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
778 bs_skip( s, 8 ); /* Reserved */
779 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
780 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
783 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
784 i, p_sys->p_page->p_region_defs[i].i_x,
785 p_sys->p_page->p_region_defs[i].i_y );
790 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
792 decoder_sys_t *p_sys = p_dec->p_sys;
793 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
794 int i_segment_length, i_processed_length, i_id, i_version;
795 int i_width, i_height, i_level_comp, i_depth, i_clut;
796 int i_8_bg, i_4_bg, i_2_bg;
799 i_segment_length = bs_read( s, 16 );
800 i_id = bs_read( s, 8 );
801 i_version = bs_read( s, 4 );
803 /* Check if we already have this region */
804 for( p_region = p_sys->p_regions; p_region != NULL;
805 p_region = p_region->p_next )
807 pp_region = &p_region->p_next;
808 if( p_region->i_id == i_id ) break;
811 /* Check version number */
812 if( p_region && p_region->i_version == i_version )
814 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
821 msg_Dbg( p_dec, "new region: %i", i_id );
823 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
824 memset( p_region, 0, sizeof(dvbsub_region_t) );
825 p_region->p_object_defs = NULL;
826 p_region->p_pixbuf = NULL;
827 p_region->p_next = NULL;
830 /* Region attributes */
831 p_region->i_id = i_id;
832 p_region->i_version = i_version;
833 b_fill = bs_read( s, 1 );
834 bs_skip( s, 3 ); /* Reserved */
836 i_width = bs_read( s, 16 );
837 i_height = bs_read( s, 16 );
839 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
841 i_level_comp = bs_read( s, 3 );
842 i_depth = bs_read( s, 3 );
843 bs_skip( s, 2 ); /* Reserved */
844 i_clut = bs_read( s, 8 );
846 i_8_bg = bs_read( s, 8 );
847 i_4_bg = bs_read( s, 4 );
848 i_2_bg = bs_read( s, 2 );
849 bs_skip( s, 2 ); /* Reserved */
851 /* Free old object defs */
852 while( p_region->i_object_defs )
854 int i = p_region->i_object_defs - 1;
855 if( p_region->p_object_defs[i].psz_text )
856 free( p_region->p_object_defs[i].psz_text );
857 if( !i ) free( p_region->p_object_defs );
859 p_region->i_object_defs--;
861 p_region->p_object_defs = NULL;
863 /* Extra sanity checks */
864 if( p_region->i_width != i_width || p_region->i_height != i_height )
866 if( p_region->p_pixbuf )
868 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
869 p_region->i_width, p_region->i_height, i_width, i_height );
870 free( p_region->p_pixbuf );
873 p_region->p_pixbuf = malloc( i_height * i_width );
874 p_region->i_depth = 0;
877 if( p_region->i_depth && (p_region->i_depth != i_depth ||
878 p_region->i_level_comp != i_level_comp || p_region->i_clut != i_clut) )
880 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
883 /* Erase background of region */
886 int i_background = (p_region->i_depth == 1) ? i_2_bg :
887 (p_region->i_depth == 2) ? i_4_bg : i_8_bg;
888 memset( p_region->p_pixbuf, i_background, i_width * i_height );
891 p_region->i_width = i_width;
892 p_region->i_height = i_height;
893 p_region->i_level_comp = i_level_comp;
894 p_region->i_depth = i_depth;
895 p_region->i_clut = i_clut;
897 /* List of objects in the region */
898 i_processed_length = 10;
899 while( i_processed_length < i_segment_length )
901 dvbsub_objectdef_t *p_obj;
903 /* We create a new object */
904 p_region->i_object_defs++;
905 p_region->p_object_defs =
906 realloc( p_region->p_object_defs,
907 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
909 /* We parse object properties */
910 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
911 p_obj->i_id = bs_read( s, 16 );
912 p_obj->i_type = bs_read( s, 2 );
913 bs_skip( s, 2 ); /* Provider */
914 p_obj->i_x = bs_read( s, 12 );
915 bs_skip( s, 4 ); /* Reserved */
916 p_obj->i_y = bs_read( s, 12 );
919 i_processed_length += 6;
921 if( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ||
922 p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING )
924 p_obj->i_fg_pc = bs_read( s, 8 );
925 p_obj->i_bg_pc = bs_read( s, 8 );
926 i_processed_length += 2;
931 /* ETSI 300 743 [7.2.1] */
932 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
934 decoder_sys_t *p_sys = p_dec->p_sys;
935 uint16_t i_segment_length;
936 uint16_t i_processed_length = 40;
937 dvbsub_display_t *p_display;
938 dvbsub_display_t *p_old = p_sys->p_display;
941 i_segment_length = bs_read( s, 16 );
942 i_version = bs_read( s, 4 );
944 /* Check version number */
945 if( p_old && p_old->i_version == i_version )
947 /* The definition did not change */
948 bs_skip( s, 8*i_segment_length - 4 );
953 msg_Dbg( p_dec, "new display definition: %i", i_version );
955 p_display = malloc( sizeof(dvbsub_display_t) );
957 /* We don't have this version of the display definition: Parse it */
958 p_display->i_version = i_version;
959 p_display->b_windowed = bs_read( s, 1 );
960 bs_skip( s, 3 ); /* Reserved bits */
961 p_display->i_width = bs_read( s, 16 )+1;
962 p_display->i_height = bs_read( s, 16 )+1;
964 if( p_display->b_windowed )
967 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
969 /* Coordinates are measured from the top left corner */
970 p_display->i_x = bs_read( s, 16 );
971 p_display->i_max_x = bs_read( s, 16 );
972 p_display->i_y = bs_read( s, 16 );
973 p_display->i_max_y = bs_read( s, 16 );
974 i_processed_length += 64;
977 p_sys->p_display = p_display;
978 if( p_old ) free( p_old );
980 if( i_processed_length != i_segment_length*8 )
982 msg_Err( p_dec, "processed length %d != segment length %d", i_processed_length, i_segment_length );
986 msg_Dbg( p_dec, "version: %d, width: %d, height: %d", p_display->i_version, p_display->i_width, p_display->i_height );
987 if( p_display->b_windowed )
988 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d", p_display->i_x, p_display->i_max_x, p_display->i_y, p_display->i_max_y );
992 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
994 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
995 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
996 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
998 static void decode_object( decoder_t *p_dec, bs_t *s )
1000 decoder_sys_t *p_sys = p_dec->p_sys;
1001 dvbsub_region_t *p_region;
1002 int i_segment_length, i_coding_method, i_version, i_id, i;
1003 vlc_bool_t b_non_modify_color;
1005 /* ETSI 300-743 paragraph 7.2.4
1006 * sync_byte, segment_type and page_id have already been processed.
1008 i_segment_length = bs_read( s, 16 );
1009 i_id = bs_read( s, 16 );
1010 i_version = bs_read( s, 4 );
1011 i_coding_method = bs_read( s, 2 );
1013 if( i_coding_method > 1 )
1015 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1016 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1020 /* Check if the object needs to be rendered in at least one
1022 for( p_region = p_sys->p_regions; p_region != NULL;
1023 p_region = p_region->p_next )
1025 for( i = 0; i < p_region->i_object_defs; i++ )
1026 if( p_region->p_object_defs[i].i_id == i_id ) break;
1028 if( i != p_region->i_object_defs ) break;
1032 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1037 msg_Dbg( p_dec, "new object: %i", i_id );
1040 b_non_modify_color = bs_read( s, 1 );
1041 bs_skip( s, 1 ); /* Reserved */
1043 if( i_coding_method == 0x00 )
1045 int i_topfield, i_bottomfield;
1046 uint8_t *p_topfield, *p_bottomfield;
1048 i_topfield = bs_read( s, 16 );
1049 i_bottomfield = bs_read( s, 16 );
1050 p_topfield = s->p_start + bs_pos( s ) / 8;
1051 p_bottomfield = p_topfield + i_topfield;
1053 bs_skip( s, 8 * (i_segment_length - 7) );
1056 if( i_segment_length < i_topfield + i_bottomfield + 7 ||
1057 p_topfield + i_topfield + i_bottomfield > s->p_end )
1059 msg_Dbg( p_dec, "corrupted object data" );
1063 for( p_region = p_sys->p_regions; p_region != NULL;
1064 p_region = p_region->p_next )
1066 for( i = 0; i < p_region->i_object_defs; i++ )
1068 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1070 dvbsub_render_pdata( p_dec, p_region,
1071 p_region->p_object_defs[i].i_x,
1072 p_region->p_object_defs[i].i_y,
1073 p_topfield, i_topfield );
1077 dvbsub_render_pdata( p_dec, p_region,
1078 p_region->p_object_defs[i].i_x,
1079 p_region->p_object_defs[i].i_y + 1,
1080 p_bottomfield, i_bottomfield );
1084 /* Duplicate the top field */
1085 dvbsub_render_pdata( p_dec, p_region,
1086 p_region->p_object_defs[i].i_x,
1087 p_region->p_object_defs[i].i_y + 1,
1088 p_topfield, i_topfield );
1095 /* DVB subtitling as characters */
1096 int i_number_of_codes = bs_read( s, 8 );
1097 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1100 if( i_segment_length < i_number_of_codes*2 + 4 ||
1101 p_start + i_number_of_codes*2 > s->p_end )
1103 msg_Dbg( p_dec, "corrupted object data" );
1107 for( p_region = p_sys->p_regions; p_region != NULL;
1108 p_region = p_region->p_next )
1110 for( i = 0; i < p_region->i_object_defs; i++ )
1114 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1116 p_region->p_object_defs[i].psz_text =
1117 realloc( p_region->p_object_defs[i].psz_text,
1118 i_number_of_codes + 1 );
1120 /* FIXME 16bits -> char ??? See Preamble */
1121 for( j = 0; j < i_number_of_codes; j++ )
1123 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1125 p_region->p_object_defs[i].psz_text[j] = 0;
1131 msg_Dbg( p_dec, "end object: %i", i_id );
1135 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1137 uint8_t *p_field, int i_field )
1144 if( !p_region->p_pixbuf )
1146 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1149 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1150 i_x >= p_region->i_width )
1152 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1156 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1157 bs_init( &bs, p_field, i_field );
1159 while( !bs_eof( &bs ) )
1162 if( i_y >= p_region->i_height ) return;
1164 switch( bs_read( &bs, 8 ) )
1167 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1172 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1177 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1184 /* We don't use map tables */
1187 case 0xf0: /* End of line code */
1188 p_pixbuf += 2*p_region->i_width;
1189 i_offset = 0; i_y += 2;
1195 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1197 vlc_bool_t b_stop = 0;
1199 while( !b_stop && !bs_eof( s ) )
1201 int i_count = 0, i_color = 0;
1203 if( (i_color = bs_read( s, 2 )) != 0x00 )
1209 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1211 i_count = 3 + bs_read( s, 3 );
1212 i_color = bs_read( s, 2 );
1216 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1218 switch( bs_read( s, 2 ) ) //Switch3
1227 i_count = 12 + bs_read( s, 4 );
1228 i_color = bs_read( s, 2 );
1231 i_count = 29 + bs_read( s, 8 );
1232 i_color = bs_read( s, 2 );
1240 /* 1 pixel color 0 */
1246 if( !i_count ) continue;
1249 if( i_count + *pi_off > i_width ) break;
1251 if( i_count == 1 ) p[*pi_off] = i_color;
1252 else memset( p + *pi_off, i_color, i_count );
1254 (*pi_off) += i_count;
1260 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1262 vlc_bool_t b_stop = 0;
1264 while( !b_stop && !bs_eof( s ) )
1266 int i_count = 0, i_color = 0;
1268 if( (i_color = bs_read( s, 4 )) != 0x00 )
1275 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1277 if( bs_show( s, 3 ) != 0x00 )
1279 i_count = 2 + bs_read( s, 3 );
1289 if( bs_read( s, 1 ) == 0x00) //Switch2
1291 i_count = 4 + bs_read( s, 2 );
1292 i_color = bs_read( s, 4 );
1296 switch ( bs_read( s, 2 ) ) //Switch3
1305 i_count = 9 + bs_read( s, 4 );
1306 i_color = bs_read( s, 4 );
1309 i_count= 25 + bs_read( s, 8 );
1310 i_color = bs_read( s, 4 );
1317 if( !i_count ) continue;
1320 if( i_count + *pi_off > i_width ) break;
1322 if( i_count == 1 ) p[*pi_off] = i_color;
1323 else memset( p + *pi_off, i_color, i_count );
1325 (*pi_off) += i_count;
1331 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1333 vlc_bool_t b_stop = 0;
1335 while( !b_stop && !bs_eof( s ) )
1337 int i_count = 0, i_color = 0;
1339 if( (i_color = bs_read( s, 8 )) != 0x00 )
1346 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1348 if( bs_show( s, 7 ) != 0x00 )
1350 i_count = bs_read( s, 7 );
1360 i_count = bs_read( s, 7 );
1361 i_color = bs_read( s, 8 );
1365 if( !i_count ) continue;
1368 if( i_count + *pi_off > i_width ) break;
1370 if( i_count == 1 ) p[*pi_off] = i_color;
1371 else memset( p + *pi_off, i_color, i_count );
1373 (*pi_off) += i_count;
1379 static void free_all( decoder_t *p_dec )
1381 decoder_sys_t *p_sys = p_dec->p_sys;
1382 dvbsub_region_t *p_reg, *p_reg_next;
1383 dvbsub_clut_t *p_clut, *p_clut_next;
1385 if( p_sys->p_display ) free( p_sys->p_display );
1387 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1389 p_clut_next = p_clut->p_next;
1392 p_sys->p_cluts = NULL;
1394 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1398 p_reg_next = p_reg->p_next;
1399 for( i = 0; i < p_reg->i_object_defs; i++ )
1400 if( p_reg->p_object_defs[i].psz_text )
1401 free( p_reg->p_object_defs[i].psz_text );
1402 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1403 if( p_reg->p_pixbuf ) free( p_reg->p_pixbuf );
1406 p_sys->p_regions = NULL;
1410 if( p_sys->p_page->i_region_defs )
1411 free( p_sys->p_page->p_region_defs );
1412 free( p_sys->p_page );
1414 p_sys->p_page = NULL;
1417 static subpicture_t *render( decoder_t *p_dec )
1419 decoder_sys_t *p_sys = p_dec->p_sys;
1420 subpicture_t *p_spu;
1421 subpicture_region_t **pp_spu_region;
1422 int i, j, i_timeout = 0;
1424 /* Allocate the subpicture internal data. */
1425 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1426 if( !p_spu ) return NULL;
1428 pp_spu_region = &p_spu->p_region;
1430 /* Loop on region definitions */
1433 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1436 for( i = 0; p_sys->p_page && i < p_sys->p_page->i_region_defs; i++ )
1438 dvbsub_region_t *p_region;
1439 dvbsub_regiondef_t *p_regiondef;
1440 dvbsub_clut_t *p_clut;
1441 dvbsub_color_t *p_color;
1442 subpicture_region_t *p_spu_region;
1443 uint8_t *p_src, *p_dst;
1447 i_timeout = p_sys->p_page->i_timeout;
1449 p_regiondef = &p_sys->p_page->p_region_defs[i];
1452 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1453 p_regiondef->i_x, p_regiondef->i_y );
1456 /* Find associated region */
1457 for( p_region = p_sys->p_regions; p_region != NULL;
1458 p_region = p_region->p_next )
1460 if( p_regiondef->i_id == p_region->i_id ) break;
1465 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1469 /* Find associated CLUT */
1470 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1472 if( p_region->i_clut == p_clut->i_id ) break;
1476 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1480 /* Create new SPU region */
1481 memset( &fmt, 0, sizeof(video_format_t) );
1482 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1483 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1484 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1485 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1486 fmt.i_x_offset = fmt.i_y_offset = 0;
1487 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1490 msg_Err( p_dec, "cannot allocate SPU region" );
1493 p_spu_region->i_x = p_regiondef->i_x;
1494 p_spu_region->i_y = p_regiondef->i_y;
1495 p_spu_region->i_align = p_sys->i_spu_position;
1496 *pp_spu_region = p_spu_region;
1497 pp_spu_region = &p_spu_region->p_next;
1500 fmt.p_palette->i_entries = p_region->i_depth == 1 ? 4 :
1501 p_region->i_depth == 2 ? 16 : 256;
1502 p_color = (p_region->i_depth == 1) ? p_clut->c_2b :
1503 (p_region->i_depth == 2) ? p_clut->c_4b : p_clut->c_8b;
1504 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1506 fmt.p_palette->palette[j][0] = p_color[j].Y;
1507 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1508 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1509 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1512 p_src = p_region->p_pixbuf;
1513 p_dst = p_spu_region->picture.Y_PIXELS;
1514 i_pitch = p_spu_region->picture.Y_PITCH;
1516 /* Copy pixel buffer */
1517 for( j = 0; j < p_region->i_height; j++ )
1519 memcpy( p_dst, p_src, p_region->i_width );
1520 p_src += p_region->i_width;
1524 /* Check subtitles encoded as strings of characters
1525 * (since there are not rendered in the pixbuffer) */
1526 for( j = 0; j < p_region->i_object_defs; j++ )
1528 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1530 if( p_object_def->i_type != 1 || !p_object_def->psz_text )
1533 /* Create new SPU region */
1534 memset( &fmt, 0, sizeof(video_format_t) );
1535 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
1536 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1537 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1538 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1539 fmt.i_x_offset = fmt.i_y_offset = 0;
1540 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1543 msg_Err( p_dec, "cannot allocate SPU region" );
1547 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1548 p_spu_region->i_x = p_regiondef->i_x + p_object_def->i_x;
1549 p_spu_region->i_y = p_regiondef->i_y + p_object_def->i_y;
1550 p_spu_region->i_align = p_sys->i_spu_position;
1551 *pp_spu_region = p_spu_region;
1552 pp_spu_region = &p_spu_region->p_next;
1556 /* Set the pf_render callback */
1557 p_spu->i_start = p_sys->i_pts;
1558 p_spu->b_ephemer = VLC_TRUE;
1559 p_spu->b_pausable = VLC_TRUE;
1560 //p_spu->b_fade = VLC_TRUE;
1561 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1563 /* Correct positioning of SPU */
1564 p_spu->b_absolute = p_sys->b_absolute;
1565 p_spu->i_flags = p_sys->i_spu_position;
1566 p_spu->i_x = p_sys->i_spu_x;
1567 p_spu->i_y = p_sys->i_spu_y;
1568 p_spu->i_original_picture_width = 720;
1569 p_spu->i_original_picture_height = 576;
1571 if( p_sys->p_display )
1573 p_spu->i_original_picture_width = p_sys->p_display->i_width;
1574 p_spu->i_original_picture_height = p_sys->p_display->i_height;
1576 if( p_sys->p_display->b_windowed )
1578 /* TODO: check that this actually works */
1579 p_spu->i_original_picture_width = p_sys->p_display->i_max_x - p_sys->p_display->i_x;
1580 p_spu->i_original_picture_height = p_sys->p_display->i_max_y - p_sys->p_display->i_y;
1581 p_spu->i_x += p_sys->p_display->i_x;
1582 p_spu->i_y += p_sys->p_display->i_y;
1589 /*****************************************************************************
1590 * encoder_sys_t : encoder descriptor
1591 *****************************************************************************/
1592 typedef struct encoder_region_t
1599 struct encoder_sys_t
1601 unsigned int i_page_ver;
1602 unsigned int i_region_ver;
1603 unsigned int i_clut_ver;
1606 encoder_region_t *p_regions;
1610 /* subpicture positioning */
1615 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1616 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1617 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1618 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1620 /*****************************************************************************
1621 * OpenEncoder: probe the encoder and return score
1622 *****************************************************************************/
1623 static int OpenEncoder( vlc_object_t *p_this )
1625 encoder_t *p_enc = (encoder_t *)p_this;
1626 encoder_sys_t *p_sys;
1629 if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','v','b','s') &&
1632 return VLC_EGENERIC;
1635 /* Allocate the memory needed to store the decoder's structure */
1636 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1638 msg_Err( p_enc, "out of memory" );
1641 p_enc->p_sys = p_sys;
1643 p_enc->pf_encode_sub = Encode;
1644 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1645 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1647 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1649 p_sys->i_page_ver = 0;
1650 p_sys->i_region_ver = 0;
1651 p_sys->i_clut_ver = 0;
1652 p_sys->i_regions = 0;
1653 p_sys->p_regions = 0;
1655 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1656 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1657 p_sys->i_offset_x = val.i_int;
1658 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1659 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1660 p_sys->i_offset_y = val.i_int;
1665 /* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
1666 * into VLC_FOURCC('Y','U','V','P')
1668 static subpicture_t *YuvaYuvp( encoder_t *p_enc, subpicture_t *p_subpic )
1670 subpicture_region_t *p_region = NULL;
1672 if( !p_subpic ) return NULL;
1674 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1676 video_format_t *p_fmt = &p_region->fmt;
1677 int i = 0, j = 0, n = 0, p = 0;
1678 int i_max_entries = 256;
1680 #ifdef RANDOM_DITHERING
1681 int i_seed = 0xdeadbeef; /* random seed */
1685 int i_pixels = p_region->picture.p[0].i_visible_lines
1686 * p_region->picture.p[0].i_pitch;
1687 int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
1688 * p_region->picture.p[0].i_pitch
1689 + p_region->picture.p[0].i_pitch * 1 / 3;
1690 int i_tolerance = 0;
1693 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1695 p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
1696 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1697 if( !p_fmt->p_palette ) break;
1698 p_fmt->p_palette->i_entries = 0;
1700 /* Find best iterator using Euclide’s algorithm */
1701 for( ; i_iterator > 1 ; i_iterator-- )
1720 /* Count colors, build best palette */
1721 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1723 vlc_bool_t b_success = VLC_TRUE;
1724 p_fmt->p_palette->i_entries = 0;
1726 for( i = 0; i < i_pixels ; )
1729 y = p_region->picture.p[0].p_pixels[i];
1730 u = p_region->picture.p[1].p_pixels[i];
1731 v = p_region->picture.p[2].p_pixels[i];
1732 a = p_region->picture.p[3].p_pixels[i];
1733 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1735 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1736 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1737 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1738 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1743 if( j == p_fmt->p_palette->i_entries )
1745 p_fmt->p_palette->palette[j][0] = y;
1746 p_fmt->p_palette->palette[j][1] = u;
1747 p_fmt->p_palette->palette[j][2] = v;
1748 p_fmt->p_palette->palette[j][3] = a;
1749 p_fmt->p_palette->i_entries++;
1751 if( p_fmt->p_palette->i_entries >= i_max_entries )
1753 b_success = VLC_FALSE;
1770 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1773 #ifndef RANDOM_DITHERING
1774 pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
1775 * sizeof(int) * 4 );
1776 for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
1782 /* Fill image with our new colours */
1783 for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
1785 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1787 for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
1789 int i_offset = p * p_region->picture.p[0].i_pitch + n;
1791 int i_mindist, i_best;
1793 y = (int)p_region->picture.p[0].p_pixels[i_offset];
1794 u = (int)p_region->picture.p[1].p_pixels[i_offset];
1795 v = (int)p_region->picture.p[2].p_pixels[i_offset];
1796 a = (int)p_region->picture.p[3].p_pixels[i_offset];
1798 /* Add dithering compensation */
1799 #ifdef RANDOM_DITHERING
1800 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1801 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1802 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1803 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1805 y += i_ydelta + pi_delta[ n * 4 ];
1806 u += i_udelta + pi_delta[ n * 4 + 1 ];
1807 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1808 a += i_adelta + pi_delta[ n * 4 + 3 ];
1811 /* Find best colour in palette */
1812 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1816 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1817 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1818 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1819 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1821 if( i_dist < i_mindist )
1828 /* Set pixel to best color */
1829 p_region->picture.p[0].p_pixels[i_offset] = i_best;
1831 /* Update dithering state */
1832 #ifdef RANDOM_DITHERING
1833 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1835 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1836 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1837 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1838 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1839 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1840 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1841 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1842 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1843 i_ydelta = i_ydelta * 5 / 8;
1844 i_udelta = i_udelta * 5 / 8;
1845 i_vdelta = i_vdelta * 5 / 8;
1846 i_adelta = i_adelta * 5 / 8;
1850 #ifndef RANDOM_DITHERING
1855 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1857 p_fmt->p_palette->palette[i][0] = 0;
1858 p_fmt->p_palette->palette[i][1] = 0;
1859 p_fmt->p_palette->palette[i][2] = 0;
1860 p_fmt->p_palette->palette[i][3] = 0;
1862 p_fmt->p_palette->i_entries = i_max_entries;
1864 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1870 /****************************************************************************
1871 * Encode: the whole thing
1872 ****************************************************************************/
1873 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1875 subpicture_t *p_temp = NULL;
1876 subpicture_region_t *p_region = NULL;
1877 bs_t bits, *s = &bits;
1880 if( !p_subpic || !p_subpic->p_region ) return NULL;
1882 /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
1883 * VLC_FOURCC('Y','U','V','P')
1885 p_region = p_subpic->p_region;
1886 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
1888 p_temp = YuvaYuvp( p_enc, p_subpic );
1891 msg_Err( p_enc, "no picture in subpicture" );
1894 p_region = p_subpic->p_region;
1898 if( !p_region ) return NULL;
1900 if( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') &&
1901 p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return NULL;
1903 if( p_region->fmt.p_palette )
1905 switch( p_region->fmt.p_palette->i_entries )
1913 msg_Err( p_enc, "subpicture palette (%d) not handled",
1914 p_region->fmt.p_palette->i_entries );
1921 msg_Dbg( p_enc, "encoding subpicture" );
1923 p_block = block_New( p_enc, 64000 );
1924 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1926 bs_write( s, 8, 0x20 ); /* Data identifier */
1927 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1929 encode_page_composition( p_enc, s, p_subpic );
1930 encode_region_composition( p_enc, s, p_subpic );
1931 encode_clut( p_enc, s, p_subpic );
1932 encode_object( p_enc, s, p_subpic );
1934 /* End of display */
1935 bs_write( s, 8, 0x0f ); /* Sync byte */
1936 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1937 bs_write( s, 16, 1 ); /* Page id */
1938 bs_write( s, 16, 0 ); /* Segment length */
1940 bs_write( s, 8, 0xff );/* End marker */
1941 p_block->i_buffer = bs_pos( s ) / 8;
1942 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1943 if( !p_subpic->b_ephemer && p_subpic->i_stop > p_subpic->i_start )
1945 block_t *p_block_stop;
1947 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1949 /* Send another (empty) subtitle to signal the end of display */
1950 p_block_stop = block_New( p_enc, 64000 );
1951 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1952 bs_write( s, 8, 0x20 ); /* Data identifier */
1953 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1954 encode_page_composition( p_enc, s, 0 );
1955 bs_write( s, 8, 0x0f ); /* Sync byte */
1956 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1957 bs_write( s, 16, 1 ); /* Page id */
1958 bs_write( s, 16, 0 ); /* Segment length */
1959 bs_write( s, 8, 0xff );/* End marker */
1960 p_block_stop->i_buffer = bs_pos( s ) / 8;
1961 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
1962 block_ChainAppend( &p_block, p_block_stop );
1963 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
1966 msg_Dbg( p_enc, "subpicture encoded properly" );
1971 /*****************************************************************************
1972 * CloseEncoder: encoder destruction
1973 *****************************************************************************/
1974 static void CloseEncoder( vlc_object_t *p_this )
1976 encoder_t *p_enc = (encoder_t *)p_this;
1977 encoder_sys_t *p_sys = p_enc->p_sys;
1979 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
1980 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
1981 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
1983 if( p_sys->i_regions ) free( p_sys->p_regions );
1987 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
1988 subpicture_t *p_subpic )
1990 encoder_sys_t *p_sys = p_enc->p_sys;
1991 subpicture_region_t *p_region;
1992 vlc_bool_t b_mode_change = VLC_FALSE;
1993 int i_regions, i_timeout;
1995 bs_write( s, 8, 0x0f ); /* Sync byte */
1996 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
1997 bs_write( s, 16, 1 ); /* Page id */
1999 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2000 p_region; p_region = p_region->p_next, i_regions++ )
2002 if( i_regions >= p_sys->i_regions )
2004 encoder_region_t region;
2005 region.i_width = region.i_height = 0;
2007 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2008 (p_sys->i_regions + 1) );
2009 p_sys->p_regions[p_sys->i_regions++] = region;
2012 if( ( p_sys->p_regions[i_regions].i_width <
2013 (int)p_region->fmt.i_visible_width ) ||
2014 ( p_sys->p_regions[i_regions].i_width >
2015 (int)p_region->fmt.i_visible_width ) )
2017 b_mode_change = VLC_TRUE;
2018 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2019 i_regions, p_sys->p_regions[i_regions].i_width,
2020 p_region->fmt.i_visible_width );
2021 p_sys->p_regions[i_regions].i_width =
2022 p_region->fmt.i_visible_width;
2024 if( p_sys->p_regions[i_regions].i_height <
2025 (int)p_region->fmt.i_visible_height )
2027 b_mode_change = VLC_TRUE;
2028 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2029 i_regions, p_sys->p_regions[i_regions].i_height,
2030 p_region->fmt.i_visible_height );
2031 p_sys->p_regions[i_regions].i_height =
2032 p_region->fmt.i_visible_height;
2036 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2039 if( p_subpic && !p_subpic->b_ephemer &&
2040 p_subpic->i_stop > p_subpic->i_start )
2042 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2045 bs_write( s, 8, i_timeout ); /* Timeout */
2046 bs_write( s, 4, p_sys->i_page_ver++ );
2047 bs_write( s, 2, b_mode_change ?
2048 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2049 bs_write( s, 2, 0 ); /* Reserved */
2051 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2052 p_region; p_region = p_region->p_next, i_regions++ )
2054 bs_write( s, 8, i_regions );
2055 bs_write( s, 8, 0 ); /* Reserved */
2056 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2058 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2059 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2063 bs_write( s, 16, p_subpic->i_x + p_region->i_x );
2064 bs_write( s, 16, p_subpic->i_y + p_region->i_y );
2069 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2071 encoder_sys_t *p_sys = p_enc->p_sys;
2072 subpicture_region_t *p_region = p_subpic->p_region;
2073 video_palette_t *p_pal, pal;
2077 if( !p_region ) return;
2079 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
2081 p_pal = p_region->fmt.p_palette;
2086 for( i = 0; i < 4; i++ )
2088 pal.palette[i][0] = 0;
2089 pal.palette[i][1] = 0;
2090 pal.palette[i][2] = 0;
2091 pal.palette[i][3] = 0;
2096 bs_write( s, 8, 0x0f ); /* Sync byte */
2097 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2098 bs_write( s, 16, 1 ); /* Page id */
2100 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2101 bs_write( s, 8, 1 ); /* Clut id */
2102 bs_write( s, 4, p_sys->i_clut_ver++ );
2103 bs_write( s, 4, 0 ); /* Reserved */
2105 for( i = 0; i < p_pal->i_entries; i++ )
2107 bs_write( s, 8, i ); /* Clut entry id */
2108 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2109 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2110 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2111 bs_write( s, 4, 0 ); /* Reserved */
2112 bs_write( s, 1, 1 ); /* Full range flag */
2113 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2114 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2115 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2116 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2117 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2121 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2122 subpicture_t *p_subpic )
2124 encoder_sys_t *p_sys = p_enc->p_sys;
2125 subpicture_region_t *p_region;
2128 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2129 p_region = p_region->p_next, i_region++ )
2131 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2133 p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T');
2137 video_palette_t *p_pal = p_region->fmt.p_palette;
2141 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2145 i_entries = p_pal->i_entries;
2146 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2148 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2150 if( !p_pal->palette[i_bg][3] ) break;
2154 bs_write( s, 8, 0x0f ); /* Sync byte */
2155 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2156 bs_write( s, 16, 1 ); /* Page id */
2158 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2159 bs_write( s, 8, i_region );
2160 bs_write( s, 4, p_sys->i_region_ver++ );
2162 /* Region attributes */
2163 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2164 bs_write( s, 3, 0 ); /* Reserved */
2165 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2166 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2167 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2168 bs_write( s, 3, i_depth ); /* Region depth */
2169 bs_write( s, 2, 0 ); /* Reserved */
2170 bs_write( s, 8, 1 ); /* Clut id */
2171 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2172 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2173 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2174 bs_write( s, 2, 0 ); /* Reserved */
2176 /* In our implementation we only have 1 object per region */
2177 bs_write( s, 16, i_region );
2178 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2179 bs_write( s, 2, 0 ); /* object provider flag */
2180 bs_write( s, 12, 0 );/* object horizontal position */
2181 bs_write( s, 4, 0 ); /* Reserved */
2182 bs_write( s, 12, 0 );/* object vertical position */
2186 bs_write( s, 8, 1 ); /* foreground pixel code */
2187 bs_write( s, 8, 0 ); /* background pixel code */
2192 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2193 subpicture_region_t *p_region,
2196 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2198 encoder_sys_t *p_sys = p_enc->p_sys;
2199 subpicture_region_t *p_region;
2202 int i_length_pos, i_update_pos, i_pixel_data_pos;
2204 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2205 p_region = p_region->p_next, i_region++ )
2207 bs_write( s, 8, 0x0f ); /* Sync byte */
2208 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2209 bs_write( s, 16, 1 ); /* Page id */
2211 i_length_pos = bs_pos( s );
2212 bs_write( s, 16, 0 ); /* Segment length */
2213 bs_write( s, 16, i_region ); /* Object id */
2214 bs_write( s, 4, p_sys->i_region_ver++ );
2216 /* object coding method */
2217 switch( p_region->fmt.i_chroma )
2219 case VLC_FOURCC( 'Y','U','V','P' ):
2220 bs_write( s, 2, 0 );
2222 case VLC_FOURCC( 'T','E','X','T' ):
2223 bs_write( s, 2, 1 );
2226 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2230 bs_write( s, 1, 0 ); /* non modifying color flag */
2231 bs_write( s, 1, 0 ); /* Reserved */
2233 if( p_region->fmt.i_chroma == VLC_FOURCC( 'T','E','X','T' ) )
2237 if( !p_region->psz_text ) continue;
2239 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2241 bs_write( s, 8, i_size ); /* number of characters in string */
2242 for( i = 0; i < i_size; i++ )
2244 bs_write( s, 16, p_region->psz_text[i] );
2247 /* Update segment length */
2248 SetWBE( &s->p_start[i_length_pos/8],
2249 (bs_pos(s) - i_length_pos)/8 -2 );
2253 /* Coding of a bitmap object */
2254 i_update_pos = bs_pos( s );
2255 bs_write( s, 16, 0 ); /* topfield data block length */
2256 bs_write( s, 16, 0 ); /* bottomfield data block length */
2259 i_pixel_data_pos = bs_pos( s );
2260 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
2261 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2262 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2265 i_pixel_data_pos = bs_pos( s );
2266 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
2267 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2268 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2270 /* Stuffing for word alignment */
2272 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2274 /* Update segment length */
2275 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2279 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2280 subpicture_region_t *p_region,
2282 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2283 subpicture_region_t *p_region,
2285 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2286 subpicture_region_t *p_region,
2288 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2289 subpicture_region_t *p_region,
2292 unsigned int i_line;
2295 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
2297 /* Encode line by line */
2298 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2301 switch( p_region->fmt.p_palette->i_entries )
2307 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2308 encode_pixel_line_2bp( p_enc, s, p_region, i_line );
2312 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2313 encode_pixel_line_4bp( p_enc, s, p_region, i_line );
2317 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2318 encode_pixel_line_8bp( p_enc, s, p_region, i_line );
2322 msg_Err( p_enc, "subpicture palette (%i) not handled",
2323 p_region->fmt.p_palette->i_entries );
2327 bs_write( s, 8, 0xf0 ); /* End of object line code */
2331 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2332 subpicture_region_t *p_region,
2335 unsigned int i, i_length = 0;
2336 int i_pitch = p_region->picture.p->i_pitch;
2337 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2338 int i_last_pixel = p_data[0];
2340 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2342 if( i != p_region->fmt.i_visible_width &&
2343 p_data[i] == i_last_pixel && i_length != 284 )
2349 if( i_length == 1 || i_length == 11 || i_length == 28 )
2351 /* 2bit/pixel code */
2352 if( i_last_pixel ) bs_write( s, 2, i_last_pixel );
2355 bs_write( s, 2, 0 );
2356 bs_write( s, 1, 0 );
2357 bs_write( s, 1, 1 ); /* pseudo color 0 */
2366 bs_write( s, 2, i_last_pixel );
2367 bs_write( s, 2, i_last_pixel );
2371 bs_write( s, 2, 0 );
2372 bs_write( s, 1, 0 );
2373 bs_write( s, 1, 0 );
2374 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2377 else if( i_length > 2 )
2379 bs_write( s, 2, 0 );
2380 if( i_length <= 10 )
2382 bs_write( s, 1, 1 );
2383 bs_write( s, 3, i_length - 3 );
2384 bs_write( s, 2, i_last_pixel );
2388 bs_write( s, 1, 0 );
2389 bs_write( s, 1, 0 );
2391 if( i_length <= 27 )
2393 bs_write( s, 2, 2 );
2394 bs_write( s, 4, i_length - 12 );
2395 bs_write( s, 2, i_last_pixel );
2399 bs_write( s, 2, 3 );
2400 bs_write( s, 8, i_length - 29 );
2401 bs_write( s, 2, i_last_pixel );
2406 if( i == p_region->fmt.i_visible_width ) break;
2408 i_last_pixel = p_data[i];
2413 bs_write( s, 2, 0 );
2414 bs_write( s, 1, 0 );
2415 bs_write( s, 1, 0 );
2416 bs_write( s, 2, 0 );
2422 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2423 subpicture_region_t *p_region,
2426 unsigned int i, i_length = 0;
2427 int i_pitch = p_region->picture.p->i_pitch;
2428 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2429 int i_last_pixel = p_data[0];
2431 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2433 if( i != p_region->fmt.i_visible_width &&
2434 p_data[i] == i_last_pixel && i_length != 280 )
2440 if( i_length == 1 || (i_length == 3 && i_last_pixel) || i_length == 8 )
2442 /* 4bit/pixel code */
2443 if( i_last_pixel ) bs_write( s, 4, i_last_pixel );
2446 bs_write( s, 4, 0 );
2447 bs_write( s, 1, 1 );
2448 bs_write( s, 1, 1 );
2449 bs_write( s, 2, 0 ); /* pseudo color 0 */
2458 bs_write( s, 4, i_last_pixel );
2459 bs_write( s, 4, i_last_pixel );
2463 bs_write( s, 4, 0 );
2464 bs_write( s, 1, 1 );
2465 bs_write( s, 1, 1 );
2466 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2469 else if( !i_last_pixel && i_length >= 3 && i_length <= 9 )
2471 bs_write( s, 4, 0 );
2472 bs_write( s, 1, 0 );
2473 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2475 else if( i_length > 2 )
2477 bs_write( s, 4, 0 );
2478 bs_write( s, 1, 1 );
2482 bs_write( s, 1, 0 );
2483 bs_write( s, 2, i_length - 4 );
2484 bs_write( s, 4, i_last_pixel );
2488 bs_write( s, 1, 1 );
2490 if( i_length <= 24 )
2492 bs_write( s, 2, 2 );
2493 bs_write( s, 4, i_length - 9 );
2494 bs_write( s, 4, i_last_pixel );
2498 bs_write( s, 2, 3 );
2499 bs_write( s, 8, i_length - 25 );
2500 bs_write( s, 4, i_last_pixel );
2505 if( i == p_region->fmt.i_visible_width ) break;
2507 i_last_pixel = p_data[i];
2512 bs_write( s, 8, 0 );
2518 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2519 subpicture_region_t *p_region,
2522 unsigned int i, i_length = 0;
2523 int i_pitch = p_region->picture.p->i_pitch;
2524 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2525 int i_last_pixel = p_data[0];
2527 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2529 if( i != p_region->fmt.i_visible_width &&
2530 p_data[i] == i_last_pixel && i_length != 127 )
2536 if( i_length == 1 && i_last_pixel )
2538 /* 8bit/pixel code */
2539 bs_write( s, 8, i_last_pixel );
2541 else if( i_length == 2 && i_last_pixel )
2543 /* 8bit/pixel code */
2544 bs_write( s, 8, i_last_pixel );
2545 bs_write( s, 8, i_last_pixel );
2547 else if( i_length <= 127 )
2549 bs_write( s, 8, 0 );
2553 bs_write( s, 1, 0 );
2554 bs_write( s, 7, i_length ); /* pseudo color 0 */
2558 bs_write( s, 1, 1 );
2559 bs_write( s, 7, i_length );
2560 bs_write( s, 8, i_last_pixel );
2564 if( i == p_region->fmt.i_visible_width ) break;
2566 i_last_pixel = p_data[i];
2571 bs_write( s, 8, 0 );
2572 bs_write( s, 8, 0 );