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) 2003-2004 VideoLAN
9 * Authors: Gildas Bazin <gbazin@videolan.org>
10 * Damien LUCAS <damien.lucas@anevia.com>
11 * Laurent Aimar <fenrir@via.ecp.fr>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
26 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
32 #include <vlc/decoder.h>
37 //#define DEBUG_DVBSUB 1
39 /*****************************************************************************
41 *****************************************************************************/
42 static int Open ( vlc_object_t * );
43 static void Close( vlc_object_t * );
44 static subpicture_t *Decode( decoder_t *, block_t ** );
46 static int OpenEncoder ( vlc_object_t * );
47 static void CloseEncoder( vlc_object_t * );
48 static block_t *Encode ( encoder_t *, subpicture_t * );
51 set_description( _("DVB subtitles decoder") );
52 set_capability( "decoder", 50 );
53 set_callbacks( Open, Close );
55 # define ENC_CFG_PREFIX "sout-dvbsub-"
57 set_description( _("DVB subtitles encoder") );
58 set_capability( "encoder", 100 );
59 set_callbacks( OpenEncoder, CloseEncoder );
62 static const char *ppsz_enc_options[] = { NULL };
64 /****************************************************************************
66 ****************************************************************************
67 * Those structures refer closely to the ETSI 300 743 Object model
68 ****************************************************************************/
70 /* The object definition gives the position of the object in a region */
71 typedef struct dvbsub_objectdef_s
82 /* The entry in the palette CLUT */
93 typedef struct dvbsub_clut_s
97 dvbsub_color_t c_2b[4];
98 dvbsub_color_t c_4b[16];
99 dvbsub_color_t c_8b[256];
101 struct dvbsub_clut_s *p_next;
105 /* The Region is an aera on the image
106 * with a list of the object definitions associated and a CLUT */
107 typedef struct dvbsub_region_s
122 dvbsub_objectdef_t *p_object_defs;
124 struct dvbsub_region_s *p_next;
128 /* The object definition gives the position of the object in a region */
129 typedef struct dvbsub_regiondef_s
135 } dvbsub_regiondef_t;
137 /* The page defines the list of regions */
146 dvbsub_regiondef_t *p_region_defs;
154 /* Decoder internal data */
159 dvbsub_page_t *p_page;
160 dvbsub_region_t *p_regions;
161 dvbsub_clut_t *p_cluts;
162 dvbsub_clut_t default_clut;
166 // List of different SEGMENT TYPES
167 // According to EN 300-743, table 2
168 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
169 #define DVBSUB_ST_REGION_COMPOSITION 0x11
170 #define DVBSUB_ST_CLUT_DEFINITION 0x12
171 #define DVBSUB_ST_OBJECT_DATA 0x13
172 #define DVBSUB_ST_ENDOFDISPLAY 0x80
173 #define DVBSUB_ST_STUFFING 0xff
174 // List of different OBJECT TYPES
175 // According to EN 300-743, table 6
176 #define DVBSUB_OT_BASIC_BITMAP 0x00
177 #define DVBSUB_OT_BASIC_CHAR 0x01
178 #define DVBSUB_OT_COMPOSITE_STRING 0x02
180 // According to EN 300-743, table 9
181 #define DVBSUB_DT_2BP_CODE_STRING 0x10
182 #define DVBSUB_DT_4BP_CODE_STRING 0x11
183 #define DVBSUB_DT_8BP_CODE_STRING 0x12
184 #define DVBSUB_DT_24_TABLE_DATA 0x20
185 #define DVBSUB_DT_28_TABLE_DATA 0x21
186 #define DVBSUB_DT_48_TABLE_DATA 0x22
187 #define DVBSUB_DT_END_LINE 0xf0
188 // List of different Page Composition Segment state
189 // According to EN 300-743, 7.2.1 table 3
190 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
191 #define DVBSUB_PCS_STATE_CHANGE 0x10
193 /*****************************************************************************
195 *****************************************************************************/
196 static void decode_segment( decoder_t *, bs_t * );
197 static void decode_page_composition( decoder_t *, bs_t * );
198 static void decode_region_composition( decoder_t *, bs_t * );
199 static void decode_object( decoder_t *, bs_t * );
200 static void decode_clut( decoder_t *, bs_t * );
201 static void free_all( decoder_t * );
203 static void default_clut_init( decoder_t * );
205 static subpicture_t *render( decoder_t * );
207 /*****************************************************************************
208 * Open: probe the decoder and return score
209 *****************************************************************************
210 * Tries to launch a decoder and return score so that the interface is able
212 *****************************************************************************/
213 static int Open( vlc_object_t *p_this )
215 decoder_t *p_dec = (decoder_t *) p_this;
216 decoder_sys_t *p_sys;
218 if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','v','b','s') )
223 p_dec->pf_decode_sub = Decode;
224 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
225 memset( p_sys, 0, sizeof(decoder_sys_t) );
228 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
229 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
230 p_sys->p_regions = NULL;
231 p_sys->p_cluts = NULL;
232 p_sys->p_page = NULL;
234 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
236 default_clut_init( p_dec );
241 /*****************************************************************************
243 *****************************************************************************/
244 static void Close( vlc_object_t *p_this )
246 decoder_t *p_dec = (decoder_t*) p_this;
247 decoder_sys_t *p_sys = p_dec->p_sys;
253 /*****************************************************************************
255 *****************************************************************************/
256 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
258 decoder_sys_t *p_sys = p_dec->p_sys;
260 subpicture_t *p_spu = NULL;
262 if( pp_block == NULL || *pp_block == NULL ) return NULL;
266 p_sys->i_pts = p_block->i_pts;
267 if( p_sys->i_pts <= 0 )
270 /* Some DVB channels send stuffing segments in non-dated packets so
271 * don't complain too loudly. */
272 msg_Warn( p_dec, "non dated subtitle" );
274 block_Release( p_block );
278 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
280 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
282 msg_Dbg( p_dec, "invalid data identifier" );
283 block_Release( p_block );
287 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
289 msg_Dbg( p_dec, "invalid subtitle stream id" );
290 block_Release( p_block );
295 msg_Dbg( p_dec, "subtitle packet received: "I64Fd, p_sys->i_pts );
298 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
300 decode_segment( p_dec, &p_sys->bs );
303 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
305 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
306 block_Release( p_block );
310 /* Check if the page is to be displayed */
311 if( p_sys->p_page ) p_spu = render( p_dec );
313 block_Release( p_block );
318 /* following functions are local */
320 /*****************************************************************************
321 * default_clut_init: default clut as defined in EN 300-743 section 10
322 *****************************************************************************/
323 static void default_clut_init( decoder_t *p_dec )
325 decoder_sys_t *p_sys = p_dec->p_sys;
328 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
329 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
330 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
333 for( i = 0; i < 4; i++ )
335 uint8_t R = 0, G = 0, B = 0, T = 0;
337 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
338 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
339 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
340 else R = G = B = 0x7F;
342 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
343 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
344 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
345 p_sys->default_clut.c_2b[i].T = T;
348 /* 16 entries CLUT */
349 for( i = 0; i < 16; i++ )
351 uint8_t R = 0, G = 0, B = 0, T = 0;
355 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
361 R = (i & 0x1) ? 0xFF : 0;
362 G = (i & 0x2) ? 0xFF : 0;
363 B = (i & 0x4) ? 0xFF : 0;
368 R = (i & 0x1) ? 0x7F : 0;
369 G = (i & 0x2) ? 0x7F : 0;
370 B = (i & 0x4) ? 0x7F : 0;
373 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
374 p_sys->default_clut.c_4b[i].Cr = RGB_TO_U(R,G,B);
375 p_sys->default_clut.c_4b[i].Cb = RGB_TO_V(R,G,B);
376 p_sys->default_clut.c_4b[i].T = T;
379 /* 256 entries CLUT (TODO) */
380 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
383 static void decode_segment( decoder_t *p_dec, bs_t *s )
385 decoder_sys_t *p_sys = p_dec->p_sys;
390 /* sync_byte (already checked) */
394 i_type = bs_read( s, 8 );
397 i_page_id = bs_read( s, 16 );
400 i_size = bs_show( s, 16 );
402 if( i_page_id != p_sys->i_id && i_page_id != p_sys->i_ancillary_id )
405 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
406 i_page_id, p_sys->i_id );
408 bs_skip( s, 8 * ( 2 + i_size ) );
413 if( i_page_id == p_sys->i_id )
414 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
416 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
421 case DVBSUB_ST_PAGE_COMPOSITION:
423 msg_Dbg( p_dec, "decode_page_composition" );
425 decode_page_composition( p_dec, s );
428 case DVBSUB_ST_REGION_COMPOSITION:
430 msg_Dbg( p_dec, "decode_region_composition" );
432 decode_region_composition( p_dec, s );
435 case DVBSUB_ST_CLUT_DEFINITION:
437 msg_Dbg( p_dec, "decode_clut" );
439 decode_clut( p_dec, s );
442 case DVBSUB_ST_OBJECT_DATA:
444 msg_Dbg( p_dec, "decode_object" );
446 decode_object( p_dec, s );
449 case DVBSUB_ST_ENDOFDISPLAY:
451 msg_Dbg( p_dec, "end of display" );
453 bs_skip( s, 8 * ( 2 + i_size ) );
456 case DVBSUB_ST_STUFFING:
458 msg_Dbg( p_dec, "skip stuffing" );
460 bs_skip( s, 8 * ( 2 + i_size ) );
464 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
465 bs_skip( s, 8 * ( 2 + i_size ) );
470 static void decode_clut( decoder_t *p_dec, bs_t *s )
472 decoder_sys_t *p_sys = p_dec->p_sys;
473 uint16_t i_segment_length;
474 uint16_t i_processed_length;
475 dvbsub_clut_t *p_clut;
478 i_segment_length = bs_read( s, 16 );
479 i_id = bs_read( s, 8 );
480 i_version = bs_read( s, 4 );
482 /* Check if we already have this clut */
483 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
485 if( p_clut->i_id == i_id ) break;
488 /* Check version number */
489 if( p_clut && p_clut->i_version == i_version )
492 bs_skip( s, 8 * i_segment_length - 12 );
499 msg_Dbg( p_dec, "new clut: %i", i_id );
501 p_clut = malloc( sizeof(dvbsub_clut_t) );
502 p_clut->p_next = p_sys->p_cluts;
503 p_sys->p_cluts = p_clut;
506 /* Initialize to default clut */
507 *p_clut = p_sys->default_clut;
509 /* We don't have this version of the CLUT: Parse it */
510 p_clut->i_version = i_version;
512 bs_skip( s, 4 ); /* Reserved bits */
513 i_processed_length = 2;
514 while( i_processed_length < i_segment_length )
516 uint8_t y, cb, cr, t;
520 i_id = bs_read( s, 8 );
521 i_type = bs_read( s, 3 );
525 if( bs_read( s, 1 ) )
528 cr = bs_read( s, 8 );
529 cb = bs_read( s, 8 );
531 i_processed_length += 6;
535 y = bs_read( s, 6 ) << 2;
536 cr = bs_read( s, 4 ) << 4;
537 cb = bs_read( s, 4 ) << 4;
538 t = bs_read( s, 2 ) << 6;
539 i_processed_length += 4;
542 /* We are not entirely compliant here as full transparency is indicated
543 * with a luma value of zero, not a transparency value of 0xff
544 * (full transparency would actually be 0xff + 1). */
552 /* According to EN 300-743 section 7.2.3 note 1, type should
553 * not have more than 1 bit set to one, but some streams don't
554 * respect this note. */
558 p_clut->c_2b[i_id].Y = y;
559 p_clut->c_2b[i_id].Cr = cr;
560 p_clut->c_2b[i_id].Cb = cb;
561 p_clut->c_2b[i_id].T = t;
565 p_clut->c_4b[i_id].Y = y;
566 p_clut->c_4b[i_id].Cr = cr;
567 p_clut->c_4b[i_id].Cb = cb;
568 p_clut->c_4b[i_id].T = t;
572 p_clut->c_8b[i_id].Y = y;
573 p_clut->c_8b[i_id].Cr = cr;
574 p_clut->c_8b[i_id].Cb = cb;
575 p_clut->c_8b[i_id].T = t;
580 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
582 decoder_sys_t *p_sys = p_dec->p_sys;
583 int i_version, i_state, i_segment_length, i_timeout, i;
585 /* A page is composed by 0 or more region */
587 i_segment_length = bs_read( s, 16 );
588 i_timeout = bs_read( s, 8 );
589 i_version = bs_read( s, 4 );
590 i_state = bs_read( s, 2 );
591 bs_skip( s, 2 ); /* Reserved */
593 if( i_state == DVBSUB_PCS_STATE_CHANGE )
595 /* End of an epoch, reset decoder buffer */
597 msg_Dbg( p_dec, "page composition mode change" );
601 else if( !p_sys->p_page && i_state != DVBSUB_PCS_STATE_ACQUISITION )
603 /* Not a full PCS, we need to wait for one */
604 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
606 #if 0 /* Try to start decoding even without an acquisition page */
607 bs_skip( s, 8 * (i_segment_length - 2) );
613 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
614 msg_Dbg( p_dec, "acquisition page composition" );
617 /* Check version number */
618 if( p_sys->p_page && p_sys->p_page->i_version == i_version )
620 bs_skip( s, 8 * (i_segment_length - 2) );
623 else if( p_sys->p_page )
625 if( p_sys->p_page->i_region_defs )
626 free( p_sys->p_page->p_region_defs );
627 p_sys->p_page->i_region_defs = 0;
633 msg_Dbg( p_dec, "new page" );
635 /* Allocate a new page */
636 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
639 p_sys->p_page->i_version = i_version;
640 p_sys->p_page->i_timeout = i_timeout;
642 /* Number of regions */
643 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
645 if( p_sys->p_page->i_region_defs == 0 ) return;
647 p_sys->p_page->p_region_defs =
648 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
649 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
651 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
652 bs_skip( s, 8 ); /* Reserved */
653 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
654 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
657 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
658 i, p_sys->p_page->p_region_defs[i].i_x,
659 p_sys->p_page->p_region_defs[i].i_y );
664 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
666 decoder_sys_t *p_sys = p_dec->p_sys;
667 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
668 int i_segment_length, i_processed_length, i_id, i_version;
669 int i_width, i_height, i_level_comp, i_depth, i_clut;
670 int i_8_bg, i_4_bg, i_2_bg;
673 i_segment_length = bs_read( s, 16 );
674 i_id = bs_read( s, 8 );
675 i_version = bs_read( s, 4 );
677 /* Check if we already have this region */
678 for( p_region = p_sys->p_regions; p_region != NULL;
679 p_region = p_region->p_next )
681 pp_region = &p_region->p_next;
682 if( p_region->i_id == i_id ) break;
685 /* Check version number */
686 if( p_region && p_region->i_version == i_version )
688 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
695 msg_Dbg( p_dec, "new region: %i", i_id );
697 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
698 memset( p_region, 0, sizeof(dvbsub_region_t) );
699 p_region->p_object_defs = NULL;
700 p_region->p_pixbuf = NULL;
701 p_region->p_next = NULL;
704 /* Region attributes */
705 p_region->i_id = i_id;
706 p_region->i_version = i_version;
707 b_fill = bs_read( s, 1 );
708 bs_skip( s, 3 ); /* Reserved */
710 i_width = bs_read( s, 16 );
711 i_height = bs_read( s, 16 );
712 i_level_comp = bs_read( s, 3 );
713 i_depth = bs_read( s, 3 );
714 bs_skip( s, 2 ); /* Reserved */
715 i_clut = bs_read( s, 8 );
717 i_8_bg = bs_read( s, 8 );
718 i_4_bg = bs_read( s, 4 );
719 i_2_bg = bs_read( s, 2 );
720 bs_skip( s, 2 ); /* Reserved */
721 p_region->i_object_defs = 0;
723 /* Extra sanity checks */
724 if( p_region->i_width != i_width || p_region->i_height != i_height )
726 if( p_region->p_pixbuf )
728 msg_Dbg( p_dec, "region size changed (not allowed)" );
729 free( p_region->p_pixbuf );
732 p_region->p_pixbuf = malloc( i_height * i_width );
733 p_region->i_depth = 0;
736 if( p_region->i_depth && (p_region->i_depth != i_depth ||
737 p_region->i_level_comp != i_level_comp || p_region->i_clut != i_clut) )
739 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
742 /* Erase background of region */
745 int i_background = (p_region->i_depth == 1) ? i_2_bg :
746 (p_region->i_depth == 2) ? i_4_bg : i_8_bg;
747 memset( p_region->p_pixbuf, i_background, i_width * i_height );
750 p_region->i_width = i_width;
751 p_region->i_height = i_height;
752 p_region->i_level_comp = i_level_comp;
753 p_region->i_depth = i_depth;
754 p_region->i_clut = i_clut;
756 /* List of objects in the region */
757 i_processed_length = 10;
758 while( i_processed_length < i_segment_length )
760 dvbsub_objectdef_t *p_obj;
762 /* We create a new object */
763 p_region->i_object_defs++;
764 p_region->p_object_defs =
765 realloc( p_region->p_object_defs,
766 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
768 /* We parse object properties */
769 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
770 p_obj->i_id = bs_read( s, 16 );
771 p_obj->i_type = bs_read( s, 2 );
772 bs_skip( s, 2 ); /* Provider */
773 p_obj->i_x = bs_read( s, 12 );
774 bs_skip( s, 4 ); /* Reserved */
775 p_obj->i_y = bs_read( s, 12 );
777 i_processed_length += 6;
779 if( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ||
780 p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING )
782 p_obj->i_fg_pc = bs_read( s, 8 );
783 p_obj->i_bg_pc = bs_read( s, 8 );
784 i_processed_length += 2;
789 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
791 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
792 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
793 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
795 static void decode_object( decoder_t *p_dec, bs_t *s )
797 decoder_sys_t *p_sys = p_dec->p_sys;
798 dvbsub_region_t *p_region;
799 int i_segment_length, i_coding_method, i_version, i_id, i;
800 vlc_bool_t b_non_modify_color;
802 i_segment_length = bs_read( s, 16 );
803 i_id = bs_read( s, 16 );
804 i_version = bs_read( s, 4 );
805 i_coding_method = bs_read( s, 2 );
807 if( i_coding_method )
809 /* TODO: DVB subtitling as characters */
810 msg_Dbg( p_dec, "DVB subtitling as characters is not handled!" );
811 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
815 /* Check if the object needs to be rendered in at least one
817 for( p_region = p_sys->p_regions; p_region != NULL;
818 p_region = p_region->p_next )
820 for( i = 0; i < p_region->i_object_defs; i++ )
821 if( p_region->p_object_defs[i].i_id == i_id ) break;
823 if( i != p_region->i_object_defs ) break;
827 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
832 msg_Dbg( p_dec, "new object: %i", i_id );
835 b_non_modify_color = bs_read( s, 1 );
836 bs_skip( s, 1 ); /* Reserved */
838 if( i_coding_method == 0x00 )
840 int i_topfield, i_bottomfield;
841 uint8_t *p_topfield, *p_bottomfield;
843 i_topfield = bs_read( s, 16 );
844 i_bottomfield = bs_read( s, 16 );
845 p_topfield = s->p_start + bs_pos( s ) / 8;
846 p_bottomfield = p_topfield + i_topfield;
848 bs_skip( s, 8 * (i_segment_length - 7) );
851 if( i_segment_length < i_topfield + i_bottomfield + 7 ||
852 s->p_start + i_topfield + i_bottomfield > s->p_end )
854 msg_Dbg( p_dec, "corrupted object data" );
858 for( p_region = p_sys->p_regions; p_region != NULL;
859 p_region = p_region->p_next )
861 for( i = 0; i < p_region->i_object_defs; i++ )
863 if( p_region->p_object_defs[i].i_id != i_id ) continue;
865 dvbsub_render_pdata( p_dec, p_region,
866 p_region->p_object_defs[i].i_x,
867 p_region->p_object_defs[i].i_y,
868 p_topfield, i_topfield );
872 dvbsub_render_pdata( p_dec, p_region,
873 p_region->p_object_defs[i].i_x,
874 p_region->p_object_defs[i].i_y + 1,
875 p_bottomfield, i_bottomfield );
879 /* Duplicate the top field */
880 dvbsub_render_pdata( p_dec, p_region,
881 p_region->p_object_defs[i].i_x,
882 p_region->p_object_defs[i].i_y + 1,
883 p_topfield, i_topfield );
890 /* TODO: DVB subtitling as characters */
894 msg_Dbg( p_dec, "end object: %i", i_id );
898 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
900 uint8_t *p_field, int i_field )
907 if( !p_region->p_pixbuf )
909 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
912 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
913 i_x >= p_region->i_width )
915 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
919 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
920 bs_init( &bs, p_field, i_field );
922 while( !bs_eof( &bs ) )
925 if( i_y >= p_region->i_height ) return;
927 switch( bs_read( &bs, 8 ) )
930 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
935 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
940 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
947 /* We don't use map tables */
950 case 0xf0: /* End of line code */
951 p_pixbuf += 2*p_region->i_width;
952 i_offset = 0; i_y += 2;
958 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
960 vlc_bool_t b_stop = 0;
962 while( !b_stop && !bs_eof( s ) )
964 int i_count = 0, i_color = 0;
966 if( (i_color = bs_read( s, 2 )) != 0x00 )
972 if( bs_read( s, 1 ) == 0x01 ) // Switch1
974 i_count = 3 + bs_read( s, 3 );
975 i_color = bs_read( s, 2 );
979 if( bs_read( s, 1 ) == 0x00 ) //Switch2
981 switch( bs_read( s, 2 ) ) //Switch3
990 i_count = 12 + bs_read( s, 4 );
991 i_color = bs_read( s, 2 );
994 i_count = 29 + bs_read( s, 8 );
995 i_color = bs_read( s, 2 );
1003 /* 1 pixel color 0 */
1009 if( !i_count ) continue;
1012 if( i_count + *pi_off > i_width ) break;
1014 if( i_count == 1 ) p[*pi_off] = i_color;
1015 else memset( p + *pi_off, i_color, i_count );
1017 (*pi_off) += i_count;
1023 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1025 vlc_bool_t b_stop = 0;
1027 while( !b_stop && !bs_eof( s ) )
1029 int i_count = 0, i_color = 0;
1031 if( (i_color = bs_read( s, 4 )) != 0x00 )
1038 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1040 if( bs_show( s, 3 ) != 0x00 )
1042 i_count = 2 + bs_read( s, 3 );
1052 if( bs_read( s, 1 ) == 0x00) //Switch2
1054 i_count = 4 + bs_read( s, 2 );
1055 i_color = bs_read( s, 4 );
1059 switch ( bs_read( s, 2 ) ) //Switch3
1068 i_count = 9 + bs_read( s, 4 );
1069 i_color = bs_read( s, 4 );
1072 i_count= 25 + bs_read( s, 8 );
1073 i_color = bs_read( s, 4 );
1080 if( !i_count ) continue;
1083 if( i_count + *pi_off > i_width ) break;
1085 if( i_count == 1 ) p[*pi_off] = i_color;
1086 else memset( p + *pi_off, i_color, i_count );
1088 (*pi_off) += i_count;
1094 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1096 vlc_bool_t b_stop = 0;
1098 while( !b_stop && !bs_eof( s ) )
1100 int i_count = 0, i_color = 0;
1102 if( (i_color = bs_read( s, 8 )) != 0x00 )
1109 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1111 if( bs_show( s, 7 ) != 0x00 )
1113 i_count = bs_read( s, 7 );
1123 i_count = bs_read( s, 7 );
1124 i_color = bs_read( s, 8 );
1128 if( !i_count ) continue;
1131 if( i_count + *pi_off > i_width ) break;
1133 if( i_count == 1 ) p[*pi_off] = i_color;
1134 else memset( p + *pi_off, i_color, i_count );
1136 (*pi_off) += i_count;
1142 static void free_all( decoder_t *p_dec )
1144 decoder_sys_t *p_sys = p_dec->p_sys;
1145 dvbsub_region_t *p_reg, *p_reg_next;
1146 dvbsub_clut_t *p_clut, *p_clut_next;
1148 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1150 p_clut_next = p_clut->p_next;
1153 p_sys->p_cluts = NULL;
1155 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1157 p_reg_next = p_reg->p_next;
1158 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1159 if( p_reg->p_pixbuf ) free( p_reg->p_pixbuf );
1162 p_sys->p_regions = NULL;
1166 if( p_sys->p_page->i_region_defs )
1167 free( p_sys->p_page->p_region_defs );
1168 free( p_sys->p_page );
1170 p_sys->p_page = NULL;
1173 static subpicture_t *render( decoder_t *p_dec )
1175 decoder_sys_t *p_sys = p_dec->p_sys;
1176 subpicture_t *p_spu;
1177 subpicture_region_t **pp_spu_region;
1178 int i, j, i_timeout = 0;
1180 /* Allocate the subpicture internal data. */
1181 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1182 if( !p_spu ) return NULL;
1184 pp_spu_region = &p_spu->p_region;
1186 /* Loop on region definitions */
1189 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1192 for( i = 0; p_sys->p_page && i < p_sys->p_page->i_region_defs; i++ )
1194 dvbsub_region_t *p_region;
1195 dvbsub_regiondef_t *p_regiondef;
1196 dvbsub_clut_t *p_clut;
1197 dvbsub_color_t *p_color;
1198 subpicture_region_t *p_spu_region;
1199 uint8_t *p_src, *p_dst;
1203 i_timeout = p_sys->p_page->i_timeout;
1205 p_regiondef = &p_sys->p_page->p_region_defs[i];
1208 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1209 p_regiondef->i_x, p_regiondef->i_y );
1212 /* Find associated region */
1213 for( p_region = p_sys->p_regions; p_region != NULL;
1214 p_region = p_region->p_next )
1216 if( p_regiondef->i_id == p_region->i_id ) break;
1221 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1225 /* Find associated CLUT */
1226 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1228 if( p_region->i_clut == p_clut->i_id ) break;
1232 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1236 /* Create new SPU region */
1237 memset( &fmt, 0, sizeof(video_format_t) );
1238 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1239 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1240 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1241 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1242 fmt.i_x_offset = fmt.i_y_offset = 0;
1243 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1246 msg_Err( p_dec, "cannot allocate SPU region" );
1249 p_spu_region->i_x = p_regiondef->i_x;
1250 p_spu_region->i_y = p_regiondef->i_y;
1251 *pp_spu_region = p_spu_region;
1252 pp_spu_region = &p_spu_region->p_next;
1255 fmt.p_palette->i_entries = p_region->i_depth == 1 ? 4 :
1256 p_region->i_depth == 2 ? 16 : 256;
1257 p_color = (p_region->i_depth == 1) ? p_clut->c_2b :
1258 (p_region->i_depth == 2) ? p_clut->c_4b : p_clut->c_8b;
1259 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1261 fmt.p_palette->palette[j][0] = p_color[j].Y;
1262 fmt.p_palette->palette[j][1] = p_color[j].Cr;
1263 fmt.p_palette->palette[j][2] = p_color[j].Cb;
1264 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1267 p_src = p_region->p_pixbuf;
1268 p_dst = p_spu_region->picture.Y_PIXELS;
1269 i_pitch = p_spu_region->picture.Y_PITCH;
1271 /* Copy pixel buffer */
1272 for( j = 0; j < p_region->i_height; j++ )
1274 memcpy( p_dst, p_src, p_region->i_width );
1275 p_src += p_region->i_width;
1280 /* Set the pf_render callback */
1281 p_spu->i_start = p_sys->i_pts;
1282 p_spu->i_stop = p_spu->i_start + i_timeout * 1000000;
1283 p_spu->b_ephemer = VLC_TRUE;
1288 /*****************************************************************************
1289 * encoder_sys_t : encoder descriptor
1290 *****************************************************************************/
1291 struct encoder_sys_t
1293 unsigned int i_page_ver;
1294 unsigned int i_region_ver;
1295 unsigned int i_clut_ver;
1306 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1307 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1308 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1309 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1311 /*****************************************************************************
1312 * OpenEncoder: probe the encoder and return score
1313 *****************************************************************************/
1314 static int OpenEncoder( vlc_object_t *p_this )
1316 encoder_t *p_enc = (encoder_t *)p_this;
1317 encoder_sys_t *p_sys;
1319 if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','v','b','s') &&
1322 return VLC_EGENERIC;
1325 /* Allocate the memory needed to store the decoder's structure */
1326 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1328 msg_Err( p_enc, "out of memory" );
1329 return VLC_EGENERIC;
1331 p_enc->p_sys = p_sys;
1333 p_enc->pf_encode_sub = Encode;
1334 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1335 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1337 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1339 p_sys->i_page_ver = 0;
1340 p_sys->i_region_ver = 0;
1341 p_sys->i_clut_ver = 0;
1346 /****************************************************************************
1347 * Encode: the whole thing
1348 ****************************************************************************/
1349 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1351 bs_t bits, *s = &bits;
1354 if( !p_subpic || !p_subpic->p_region ) return 0;
1356 msg_Dbg( p_enc, "encoding subpicture" );
1358 p_block = block_New( p_enc, 64000 );
1359 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1361 bs_write( s, 8, 0x20 ); /* Data identifier */
1362 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1364 encode_page_composition( p_enc, s, p_subpic );
1365 encode_region_composition( p_enc, s, p_subpic );
1366 encode_clut( p_enc, s, p_subpic );
1367 encode_object( p_enc, s, p_subpic );
1369 /* End of display */
1370 bs_write( s, 8, 0x0f ); /* Sync byte */
1371 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1372 bs_write( s, 16, 1 ); /* Page id */
1373 bs_write( s, 16, 0 ); /* Segment length */
1375 bs_write( s, 8, 0xff ); /* End marker */
1376 p_block->i_buffer = bs_pos( s ) / 8;
1377 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1378 if( !p_subpic->b_ephemer && p_subpic->i_stop )
1379 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1381 msg_Dbg( p_enc, "subpicture encoded properly" );
1386 /*****************************************************************************
1387 * CloseEncoder: encoder destruction
1388 *****************************************************************************/
1389 static void CloseEncoder( vlc_object_t *p_this )
1391 encoder_t *p_enc = (encoder_t *)p_this;
1392 encoder_sys_t *p_sys = p_enc->p_sys;
1397 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
1398 subpicture_t *p_subpic )
1400 encoder_sys_t *p_sys = p_enc->p_sys;
1401 subpicture_region_t *p_region;
1404 bs_write( s, 8, 0x0f ); /* Sync byte */
1405 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
1406 bs_write( s, 16, 1 ); /* Page id */
1408 for( i_regions = 0, p_region = p_subpic->p_region; p_region;
1409 p_region = p_region->p_next, i_regions++ );
1411 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
1413 bs_write( s, 8, 5 ); /* Timeout */
1414 bs_write( s, 4, p_sys->i_page_ver++ );
1415 bs_write( s, 2, DVBSUB_PCS_STATE_ACQUISITION );
1416 bs_write( s, 2, 0 ); /* Reserved */
1418 for( i_regions = 0, p_region = p_subpic->p_region; p_region;
1419 p_region = p_region->p_next, i_regions++ )
1421 bs_write( s, 8, i_regions );
1422 bs_write( s, 8, 0 ); /* Reserved */
1423 bs_write( s, 16, p_region->i_x );
1424 bs_write( s, 16, p_region->i_y );
1428 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
1430 encoder_sys_t *p_sys = p_enc->p_sys;
1431 subpicture_region_t *p_region = p_subpic->p_region;
1432 video_palette_t *p_pal;
1436 if( !p_region || !p_region->fmt.p_palette ||
1437 p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
1439 bs_write( s, 8, 0x0f ); /* Sync byte */
1440 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
1441 bs_write( s, 16, 1 ); /* Page id */
1443 p_pal = p_region->fmt.p_palette;
1445 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
1446 bs_write( s, 8, 1 ); /* Clut id */
1447 bs_write( s, 4, p_sys->i_clut_ver++ );
1448 bs_write( s, 4, 0 ); /* Reserved */
1450 for( i = 0; i < p_pal->i_entries; i++ )
1452 bs_write( s, 8, i ); /* Clut entry id */
1453 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
1454 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
1455 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
1456 bs_write( s, 4, 0 ); /* Reserved */
1457 bs_write( s, 1, 1 ); /* Full range flag */
1458 bs_write( s, 8, p_pal->palette[i][0] ); /* Y value */
1459 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
1460 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
1461 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
1465 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
1466 subpicture_t *p_subpic )
1468 encoder_sys_t *p_sys = p_enc->p_sys;
1469 subpicture_region_t *p_region;
1472 for( i_regions = 0, p_region = p_subpic->p_region; p_region;
1473 p_region = p_region->p_next, i_regions++ )
1475 video_palette_t *p_pal = p_region->fmt.p_palette;
1476 int i_depth = p_pal->i_entries == 4 ? 0x1 :
1477 p_pal->i_entries == 16 ? 0x2 : 0x3;
1479 bs_write( s, 8, 0x0f ); /* Sync byte */
1480 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
1481 bs_write( s, 16, 1 ); /* Page id */
1483 bs_write( s, 16, 10 + 6 ); /* Segment length */
1484 bs_write( s, 8, i_regions );
1485 bs_write( s, 4, p_sys->i_region_ver++ );
1487 /* Region attributes */
1488 bs_write( s, 1, 0 ); /* Fill */
1489 bs_write( s, 3, 0 ); /* Reserved */
1490 bs_write( s, 16, p_region->fmt.i_visible_width );
1491 bs_write( s, 16, p_region->fmt.i_visible_height );
1492 bs_write( s, 3, i_depth ); /* Region level of compatibility */
1493 bs_write( s, 3, i_depth ); /* Region depth */
1494 bs_write( s, 2, 0 ); /* Reserved */
1495 bs_write( s, 8, 1 ); /* Clut id */
1496 bs_write( s, 8, 0 ); /* region 8bit pixel code */
1497 bs_write( s, 4, 0 ); /* region 4bit pixel code */
1498 bs_write( s, 2, 0 ); /* region 2bit pixel code */
1499 bs_write( s, 2, 0 ); /* Reserved */
1501 /* In our implementation we only have 1 object per region */
1502 bs_write( s, 16, i_regions );
1503 bs_write( s, 2, DVBSUB_OT_BASIC_BITMAP );
1504 bs_write( s, 2, 0 ); /* object provider flag */
1505 bs_write( s, 12, 0 ); /* object horizontal position */
1506 bs_write( s, 4, 0 ); /* Reserved */
1507 bs_write( s, 12, 0 ); /* object vertical position */
1511 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
1512 subpicture_region_t *p_region,
1515 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
1517 encoder_sys_t *p_sys = p_enc->p_sys;
1518 subpicture_region_t *p_region;
1521 int i_length_pos, i_update_pos, i_pixel_data_pos;
1523 for( i_regions = 0, p_region = p_subpic->p_region; p_region;
1524 p_region = p_region->p_next, i_regions++ )
1526 bs_write( s, 8, 0x0f ); /* Sync byte */
1527 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
1528 bs_write( s, 16, 1 ); /* Page id */
1530 i_length_pos = bs_pos( s );
1531 bs_write( s, 16, 0 ); /* Segment length */
1532 bs_write( s, 16, i_regions ); /* Object id */
1533 bs_write( s, 4, p_sys->i_region_ver++ );
1534 bs_write( s, 2, 0 ); /* object coding method */
1536 bs_write( s, 1, 0 ); /* non modifying color flag */
1537 bs_write( s, 1, 0 ); /* Reserved */
1539 i_update_pos = bs_pos( s );
1540 bs_write( s, 16, 0 ); /* topfield data block length */
1541 bs_write( s, 16, 0 ); /* bottomfield data block length */
1544 i_pixel_data_pos = bs_pos( s );
1545 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
1546 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
1547 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
1550 i_pixel_data_pos = bs_pos( s );
1551 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
1552 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
1553 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
1555 /* Stuffing for word alignment */
1557 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
1559 /* Update segment length */
1560 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
1564 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
1565 subpicture_region_t *p_region,
1567 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
1568 subpicture_region_t *p_region,
1570 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
1571 subpicture_region_t *p_region,
1574 unsigned int i_line;
1577 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
1579 /* Encode line by line */
1580 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
1583 switch( p_region->fmt.p_palette->i_entries )
1586 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
1587 encode_pixel_line_2bp( p_enc, s, p_region, i_line );
1591 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
1592 encode_pixel_line_4bp( p_enc, s, p_region, i_line );
1596 msg_Err( p_enc, "subpicture palette (%i) not handled",
1597 p_region->fmt.p_palette->i_entries );
1601 bs_write( s, 8, 0xf0 ); /* End of object line code */
1605 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
1606 subpicture_region_t *p_region,
1609 unsigned int i, i_length = 0;
1610 int i_pitch = p_region->picture.p->i_pitch;
1611 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
1612 int i_last_pixel = p_data[0];
1614 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
1616 if( i != p_region->fmt.i_visible_width &&
1617 p_data[i] == i_last_pixel && i_length != 284 )
1623 if( i_length == 1 || i_length == 11 || i_length == 28 )
1625 /* 2bit/pixel code */
1626 if( i_last_pixel ) bs_write( s, 2, i_last_pixel );
1629 bs_write( s, 2, 0 );
1630 bs_write( s, 1, 0 );
1631 bs_write( s, 1, 1 ); /* pseudo color 0 */
1640 bs_write( s, 2, i_last_pixel );
1641 bs_write( s, 2, i_last_pixel );
1645 bs_write( s, 2, 0 );
1646 bs_write( s, 1, 0 );
1647 bs_write( s, 1, 0 );
1648 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
1651 else if( i_length > 2 )
1653 bs_write( s, 2, 0 );
1654 if( i_length <= 10 )
1656 bs_write( s, 1, 1 );
1657 bs_write( s, 3, i_length - 3 );
1658 bs_write( s, 2, i_last_pixel );
1662 bs_write( s, 1, 0 );
1663 bs_write( s, 1, 0 );
1665 if( i_length <= 27 )
1667 bs_write( s, 2, 2 );
1668 bs_write( s, 4, i_length - 12 );
1669 bs_write( s, 2, i_last_pixel );
1673 bs_write( s, 2, 3 );
1674 bs_write( s, 8, i_length - 29 );
1675 bs_write( s, 2, i_last_pixel );
1680 if( i == p_region->fmt.i_visible_width ) break;
1682 i_last_pixel = p_data[i];
1687 bs_write( s, 2, 0 );
1688 bs_write( s, 1, 0 );
1689 bs_write( s, 1, 0 );
1690 bs_write( s, 2, 0 );
1696 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
1697 subpicture_region_t *p_region,
1700 unsigned int i, i_length = 0;
1701 int i_pitch = p_region->picture.p->i_pitch;
1702 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
1703 int i_last_pixel = p_data[0];
1705 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
1707 if( i != p_region->fmt.i_visible_width &&
1708 p_data[i] == i_last_pixel && i_length != 1 )
1716 /* 4bit/pixel code */
1717 if( i_last_pixel ) bs_write( s, 4, i_last_pixel );
1720 bs_write( s, 4, 0 );
1721 bs_write( s, 1, 1 );
1722 bs_write( s, 1, 1 );
1723 bs_write( s, 2, 0 ); /* pseudo color 0 */
1727 if( i == p_region->fmt.i_visible_width ) break;
1729 i_last_pixel = p_data[i];
1734 bs_write( s, 8, 0 );