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>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
27 *****************************************************************************/
28 /*****************************************************************************
32 * DVB subtitles coded as strings of characters are not handled correctly.
33 * The character codes in the string should actually be indexes refering to a
34 * character table identified in the subtitle descriptor.
35 *****************************************************************************/
38 #include <vlc/decoder.h>
43 /* #define DEBUG_DVBSUB 1 */
45 #define POSX_TEXT N_("Decoding X coordinate")
46 #define POSX_LONGTEXT N_("X coordinate of the rendered subtitle")
48 #define POSY_TEXT N_("Decoding Y coordinate")
49 #define POSY_LONGTEXT N_("Y coordinate of the rendered subtitle")
51 #define POS_TEXT N_("Subpicture position")
52 #define POS_LONGTEXT N_( \
53 "You can enforce the subpicture position on the video " \
54 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
55 "also use combinations of these values, e.g. 6=top-right).")
57 #define ENC_POSX_TEXT N_("Encoding X coordinate")
58 #define ENC_POSX_LONGTEXT N_("X coordinate of the encoded subtitle" )
59 #define ENC_POSY_TEXT N_("Encoding Y coordinate")
60 #define ENC_POSY_LONGTEXT N_("Y coordinate of the encoded subtitle" )
62 static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
63 static char *ppsz_pos_descriptions[] =
64 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
65 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
67 /*****************************************************************************
69 *****************************************************************************/
70 static int Open ( vlc_object_t * );
71 static void Close( vlc_object_t * );
72 static subpicture_t *Decode( decoder_t *, block_t ** );
74 static int OpenEncoder ( vlc_object_t * );
75 static void CloseEncoder( vlc_object_t * );
76 static block_t *Encode ( encoder_t *, subpicture_t * );
79 # define DVBSUB_CFG_PREFIX "dvbsub-"
80 set_description( _("DVB subtitles decoder") );
81 set_capability( "decoder", 50 );
82 set_category( CAT_INPUT );
83 set_subcategory( SUBCAT_INPUT_SCODEC );
84 set_callbacks( Open, Close );
86 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, VLC_TRUE );
87 change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
88 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
89 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
91 # define ENC_CFG_PREFIX "sout-dvbsub-"
93 set_description( _("DVB subtitles encoder") );
94 set_capability( "encoder", 100 );
95 set_callbacks( OpenEncoder, CloseEncoder );
97 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, VLC_FALSE );
98 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, VLC_FALSE );
101 static const char *ppsz_enc_options[] = { NULL };
103 /****************************************************************************
105 ****************************************************************************
106 * Those structures refer closely to the ETSI 300 743 Object model
107 ****************************************************************************/
109 /* The object definition gives the position of the object in a region */
110 typedef struct dvbsub_objectdef_s
118 char *psz_text; /* for string of characters objects */
120 } dvbsub_objectdef_t;
122 /* The entry in the palette CLUT */
133 typedef struct dvbsub_clut_s
137 dvbsub_color_t c_2b[4];
138 dvbsub_color_t c_4b[16];
139 dvbsub_color_t c_8b[256];
141 struct dvbsub_clut_s *p_next;
145 /* The Region is an aera on the image
146 * with a list of the object definitions associated and a CLUT */
147 typedef struct dvbsub_region_s
162 dvbsub_objectdef_t *p_object_defs;
164 struct dvbsub_region_s *p_next;
168 /* The object definition gives the position of the object in a region */
169 typedef struct dvbsub_regiondef_s
175 } dvbsub_regiondef_t;
177 /* The page defines the list of regions */
181 int i_timeout; /* in seconds */
186 dvbsub_regiondef_t *p_region_defs;
194 /* Decoder internal data */
199 vlc_bool_t b_absolute;
205 dvbsub_page_t *p_page;
206 dvbsub_region_t *p_regions;
207 dvbsub_clut_t *p_cluts;
208 dvbsub_clut_t default_clut;
212 /* List of different SEGMENT TYPES */
213 /* According to EN 300-743, table 2 */
214 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
215 #define DVBSUB_ST_REGION_COMPOSITION 0x11
216 #define DVBSUB_ST_CLUT_DEFINITION 0x12
217 #define DVBSUB_ST_OBJECT_DATA 0x13
218 #define DVBSUB_ST_ENDOFDISPLAY 0x80
219 #define DVBSUB_ST_STUFFING 0xff
220 /* List of different OBJECT TYPES */
221 /* According to EN 300-743, table 6 */
222 #define DVBSUB_OT_BASIC_BITMAP 0x00
223 #define DVBSUB_OT_BASIC_CHAR 0x01
224 #define DVBSUB_OT_COMPOSITE_STRING 0x02
225 /* Pixel DATA TYPES */
226 /* According to EN 300-743, table 9 */
227 #define DVBSUB_DT_2BP_CODE_STRING 0x10
228 #define DVBSUB_DT_4BP_CODE_STRING 0x11
229 #define DVBSUB_DT_8BP_CODE_STRING 0x12
230 #define DVBSUB_DT_24_TABLE_DATA 0x20
231 #define DVBSUB_DT_28_TABLE_DATA 0x21
232 #define DVBSUB_DT_48_TABLE_DATA 0x22
233 #define DVBSUB_DT_END_LINE 0xf0
234 /* List of different Page Composition Segment state */
235 /* According to EN 300-743, 7.2.1 table 3 */
236 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
237 #define DVBSUB_PCS_STATE_CHANGE 0x02
239 /*****************************************************************************
241 *****************************************************************************/
242 static void decode_segment( decoder_t *, bs_t * );
243 static void decode_page_composition( decoder_t *, bs_t * );
244 static void decode_region_composition( decoder_t *, bs_t * );
245 static void decode_object( decoder_t *, bs_t * );
246 static void decode_clut( decoder_t *, bs_t * );
247 static void free_all( decoder_t * );
249 static void default_clut_init( decoder_t * );
251 static subpicture_t *render( decoder_t * );
253 /*****************************************************************************
254 * Open: probe the decoder and return score
255 *****************************************************************************
256 * Tries to launch a decoder and return score so that the interface is able
258 *****************************************************************************/
259 static int Open( vlc_object_t *p_this )
261 decoder_t *p_dec = (decoder_t *) p_this;
262 decoder_sys_t *p_sys;
266 if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','v','b','s') )
271 p_dec->pf_decode_sub = Decode;
272 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
273 memset( p_sys, 0, sizeof(decoder_sys_t) );
275 p_sys->i_pts = (mtime_t) 0;
276 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
277 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
279 p_sys->p_regions = NULL;
280 p_sys->p_cluts = NULL;
281 p_sys->p_page = NULL;
283 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
284 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
285 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
286 p_sys->i_spu_position = val.i_int;
287 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
288 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
289 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
291 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
292 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
293 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
296 /* Check if subpicture position was overridden */
297 p_sys->b_absolute = VLC_TRUE;
298 p_sys->i_spu_x = p_sys->i_spu_y = 0;
300 if( i_posx >= 0 && i_posy >= 0 )
302 p_sys->b_absolute = VLC_FALSE;
303 p_sys->i_spu_x = i_posx;
304 p_sys->i_spu_y = i_posy;
307 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
309 default_clut_init( p_dec );
314 /*****************************************************************************
316 *****************************************************************************/
317 static void Close( vlc_object_t *p_this )
319 decoder_t *p_dec = (decoder_t*) p_this;
320 decoder_sys_t *p_sys = p_dec->p_sys;
322 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
323 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
324 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
330 /*****************************************************************************
332 *****************************************************************************/
333 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
335 decoder_sys_t *p_sys = p_dec->p_sys;
337 subpicture_t *p_spu = NULL;
339 if( pp_block == NULL || *pp_block == NULL ) return NULL;
343 p_sys->i_pts = p_block->i_pts;
344 if( p_sys->i_pts <= 0 )
347 /* Some DVB channels send stuffing segments in non-dated packets so
348 * don't complain too loudly. */
349 msg_Warn( p_dec, "non dated subtitle" );
351 block_Release( p_block );
355 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
357 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
359 msg_Dbg( p_dec, "invalid data identifier" );
360 block_Release( p_block );
364 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
366 msg_Dbg( p_dec, "invalid subtitle stream id" );
367 block_Release( p_block );
372 msg_Dbg( p_dec, "subtitle packet received: "I64Fd, p_sys->i_pts );
375 p_sys->b_page = VLC_FALSE;
376 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
378 decode_segment( p_dec, &p_sys->bs );
381 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
383 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
384 block_Release( p_block );
388 /* Check if the page is to be displayed */
389 if( p_sys->p_page && p_sys->b_page ) p_spu = render( p_dec );
391 block_Release( p_block );
396 /* following functions are local */
398 /*****************************************************************************
399 * default_clut_init: default clut as defined in EN 300-743 section 10
400 *****************************************************************************/
401 static void default_clut_init( decoder_t *p_dec )
403 decoder_sys_t *p_sys = p_dec->p_sys;
406 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
407 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
408 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
411 for( i = 0; i < 4; i++ )
413 uint8_t R = 0, G = 0, B = 0, T = 0;
415 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
416 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
417 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
418 else R = G = B = 0x7F;
420 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
421 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
422 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
423 p_sys->default_clut.c_2b[i].T = T;
426 /* 16 entries CLUT */
427 for( i = 0; i < 16; i++ )
429 uint8_t R = 0, G = 0, B = 0, T = 0;
433 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
439 R = (i & 0x1) ? 0xFF : 0;
440 G = (i & 0x2) ? 0xFF : 0;
441 B = (i & 0x4) ? 0xFF : 0;
446 R = (i & 0x1) ? 0x7F : 0;
447 G = (i & 0x2) ? 0x7F : 0;
448 B = (i & 0x4) ? 0x7F : 0;
451 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
452 p_sys->default_clut.c_4b[i].Cr = RGB_TO_U(R,G,B);
453 p_sys->default_clut.c_4b[i].Cb = RGB_TO_V(R,G,B);
454 p_sys->default_clut.c_4b[i].T = T;
457 /* 256 entries CLUT */
458 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
461 static void decode_segment( decoder_t *p_dec, bs_t *s )
463 decoder_sys_t *p_sys = p_dec->p_sys;
468 /* sync_byte (already checked) */
472 i_type = bs_read( s, 8 );
475 i_page_id = bs_read( s, 16 );
478 i_size = bs_show( s, 16 );
480 if( i_page_id != p_sys->i_id && i_page_id != p_sys->i_ancillary_id )
483 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
484 i_page_id, p_sys->i_id );
486 bs_skip( s, 8 * ( 2 + i_size ) );
490 if( p_sys->i_ancillary_id != p_sys->i_id &&
491 i_type == DVBSUB_ST_PAGE_COMPOSITION &&
492 i_page_id == p_sys->i_ancillary_id )
495 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
497 bs_skip( s, 8 * ( 2 + i_size ) );
502 if( i_page_id == p_sys->i_id )
503 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
505 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
510 case DVBSUB_ST_PAGE_COMPOSITION:
512 msg_Dbg( p_dec, "decode_page_composition" );
514 decode_page_composition( p_dec, s );
517 case DVBSUB_ST_REGION_COMPOSITION:
519 msg_Dbg( p_dec, "decode_region_composition" );
521 decode_region_composition( p_dec, s );
524 case DVBSUB_ST_CLUT_DEFINITION:
526 msg_Dbg( p_dec, "decode_clut" );
528 decode_clut( p_dec, s );
531 case DVBSUB_ST_OBJECT_DATA:
533 msg_Dbg( p_dec, "decode_object" );
535 decode_object( p_dec, s );
538 case DVBSUB_ST_ENDOFDISPLAY:
540 msg_Dbg( p_dec, "end of display" );
542 bs_skip( s, 8 * ( 2 + i_size ) );
545 case DVBSUB_ST_STUFFING:
547 msg_Dbg( p_dec, "skip stuffing" );
549 bs_skip( s, 8 * ( 2 + i_size ) );
553 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
554 bs_skip( s, 8 * ( 2 + i_size ) );
559 static void decode_clut( decoder_t *p_dec, bs_t *s )
561 decoder_sys_t *p_sys = p_dec->p_sys;
562 uint16_t i_segment_length;
563 uint16_t i_processed_length;
564 dvbsub_clut_t *p_clut, *p_next;
567 i_segment_length = bs_read( s, 16 );
568 i_id = bs_read( s, 8 );
569 i_version = bs_read( s, 4 );
571 /* Check if we already have this clut */
572 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
574 if( p_clut->i_id == i_id ) break;
577 /* Check version number */
578 if( p_clut && p_clut->i_version == i_version )
581 bs_skip( s, 8 * i_segment_length - 12 );
588 msg_Dbg( p_dec, "new clut: %i", i_id );
590 p_clut = malloc( sizeof(dvbsub_clut_t) );
591 p_clut->p_next = p_sys->p_cluts;
592 p_sys->p_cluts = p_clut;
595 /* Initialize to default clut */
596 p_next = p_clut->p_next;
597 *p_clut = p_sys->default_clut;
598 p_clut->p_next = p_next;
600 /* We don't have this version of the CLUT: Parse it */
601 p_clut->i_version = i_version;
603 bs_skip( s, 4 ); /* Reserved bits */
604 i_processed_length = 2;
605 while( i_processed_length < i_segment_length )
607 uint8_t y, cb, cr, t;
611 i_id = bs_read( s, 8 );
612 i_type = bs_read( s, 3 );
616 if( bs_read( s, 1 ) )
619 cr = bs_read( s, 8 );
620 cb = bs_read( s, 8 );
622 i_processed_length += 6;
626 y = bs_read( s, 6 ) << 2;
627 cr = bs_read( s, 4 ) << 4;
628 cb = bs_read( s, 4 ) << 4;
629 t = bs_read( s, 2 ) << 6;
630 i_processed_length += 4;
633 /* We are not entirely compliant here as full transparency is indicated
634 * with a luma value of zero, not a transparency value of 0xff
635 * (full transparency would actually be 0xff + 1). */
642 /* According to EN 300-743 section 7.2.3 note 1, type should
643 * not have more than 1 bit set to one, but some streams don't
644 * respect this note. */
645 if( i_type & 0x04 && i_id < 4 )
647 p_clut->c_2b[i_id].Y = y;
648 p_clut->c_2b[i_id].Cr = cr;
649 p_clut->c_2b[i_id].Cb = cb;
650 p_clut->c_2b[i_id].T = t;
652 if( i_type & 0x02 && i_id < 16 )
654 p_clut->c_4b[i_id].Y = y;
655 p_clut->c_4b[i_id].Cr = cr;
656 p_clut->c_4b[i_id].Cb = cb;
657 p_clut->c_4b[i_id].T = t;
661 p_clut->c_8b[i_id].Y = y;
662 p_clut->c_8b[i_id].Cr = cr;
663 p_clut->c_8b[i_id].Cb = cb;
664 p_clut->c_8b[i_id].T = t;
669 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
671 decoder_sys_t *p_sys = p_dec->p_sys;
672 int i_version, i_state, i_segment_length, i_timeout, i;
674 /* A page is composed by 0 or more region */
675 i_segment_length = bs_read( s, 16 );
676 i_timeout = bs_read( s, 8 );
677 i_version = bs_read( s, 4 );
678 i_state = bs_read( s, 2 );
679 bs_skip( s, 2 ); /* Reserved */
681 if( i_state == DVBSUB_PCS_STATE_CHANGE )
683 /* End of an epoch, reset decoder buffer */
685 msg_Dbg( p_dec, "page composition mode change" );
689 else if( !p_sys->p_page && i_state != DVBSUB_PCS_STATE_ACQUISITION &&
690 i_state != DVBSUB_PCS_STATE_CHANGE )
692 /* Not a full PCS, we need to wait for one */
693 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
696 /* Try to start decoding even without an acquisition page */
697 bs_skip( s, 8 * (i_segment_length - 2) );
703 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
704 msg_Dbg( p_dec, "acquisition page composition" );
707 /* Check version number */
708 if( p_sys->p_page && p_sys->p_page->i_version == i_version )
710 bs_skip( s, 8 * (i_segment_length - 2) );
713 else if( p_sys->p_page )
715 if( p_sys->p_page->i_region_defs )
716 free( p_sys->p_page->p_region_defs );
717 p_sys->p_page->i_region_defs = 0;
723 msg_Dbg( p_dec, "new page" );
725 /* Allocate a new page */
726 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
729 p_sys->p_page->i_version = i_version;
730 p_sys->p_page->i_timeout = i_timeout;
731 p_sys->b_page = VLC_TRUE;
733 /* Number of regions */
734 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
736 if( p_sys->p_page->i_region_defs == 0 ) return;
738 p_sys->p_page->p_region_defs =
739 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
740 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
742 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
743 bs_skip( s, 8 ); /* Reserved */
744 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
745 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
748 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
749 i, p_sys->p_page->p_region_defs[i].i_x,
750 p_sys->p_page->p_region_defs[i].i_y );
755 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
757 decoder_sys_t *p_sys = p_dec->p_sys;
758 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
759 int i_segment_length, i_processed_length, i_id, i_version;
760 int i_width, i_height, i_level_comp, i_depth, i_clut;
761 int i_8_bg, i_4_bg, i_2_bg;
764 i_segment_length = bs_read( s, 16 );
765 i_id = bs_read( s, 8 );
766 i_version = bs_read( s, 4 );
768 /* Check if we already have this region */
769 for( p_region = p_sys->p_regions; p_region != NULL;
770 p_region = p_region->p_next )
772 pp_region = &p_region->p_next;
773 if( p_region->i_id == i_id ) break;
776 /* Check version number */
777 if( p_region && p_region->i_version == i_version )
779 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
786 msg_Dbg( p_dec, "new region: %i", i_id );
788 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
789 memset( p_region, 0, sizeof(dvbsub_region_t) );
790 p_region->p_object_defs = NULL;
791 p_region->p_pixbuf = NULL;
792 p_region->p_next = NULL;
795 /* Region attributes */
796 p_region->i_id = i_id;
797 p_region->i_version = i_version;
798 b_fill = bs_read( s, 1 );
799 bs_skip( s, 3 ); /* Reserved */
801 i_width = bs_read( s, 16 );
802 i_height = bs_read( s, 16 );
804 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
806 i_level_comp = bs_read( s, 3 );
807 i_depth = bs_read( s, 3 );
808 bs_skip( s, 2 ); /* Reserved */
809 i_clut = bs_read( s, 8 );
811 i_8_bg = bs_read( s, 8 );
812 i_4_bg = bs_read( s, 4 );
813 i_2_bg = bs_read( s, 2 );
814 bs_skip( s, 2 ); /* Reserved */
816 /* Free old object defs */
817 while( p_region->i_object_defs )
819 int i = p_region->i_object_defs - 1;
820 if( p_region->p_object_defs[i].psz_text )
821 free( p_region->p_object_defs[i].psz_text );
822 if( !i ) free( p_region->p_object_defs );
824 p_region->i_object_defs--;
826 p_region->p_object_defs = NULL;
828 /* Extra sanity checks */
829 if( p_region->i_width != i_width || p_region->i_height != i_height )
831 if( p_region->p_pixbuf )
833 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
834 p_region->i_width, p_region->i_height, i_width, i_height );
835 free( p_region->p_pixbuf );
838 p_region->p_pixbuf = malloc( i_height * i_width );
839 p_region->i_depth = 0;
842 if( p_region->i_depth && (p_region->i_depth != i_depth ||
843 p_region->i_level_comp != i_level_comp || p_region->i_clut != i_clut) )
845 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
848 /* Erase background of region */
851 int i_background = (p_region->i_depth == 1) ? i_2_bg :
852 (p_region->i_depth == 2) ? i_4_bg : i_8_bg;
853 memset( p_region->p_pixbuf, i_background, i_width * i_height );
856 p_region->i_width = i_width;
857 p_region->i_height = i_height;
858 p_region->i_level_comp = i_level_comp;
859 p_region->i_depth = i_depth;
860 p_region->i_clut = i_clut;
862 /* List of objects in the region */
863 i_processed_length = 10;
864 while( i_processed_length < i_segment_length )
866 dvbsub_objectdef_t *p_obj;
868 /* We create a new object */
869 p_region->i_object_defs++;
870 p_region->p_object_defs =
871 realloc( p_region->p_object_defs,
872 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
874 /* We parse object properties */
875 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
876 p_obj->i_id = bs_read( s, 16 );
877 p_obj->i_type = bs_read( s, 2 );
878 bs_skip( s, 2 ); /* Provider */
879 p_obj->i_x = bs_read( s, 12 );
880 bs_skip( s, 4 ); /* Reserved */
881 p_obj->i_y = bs_read( s, 12 );
884 i_processed_length += 6;
886 if( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ||
887 p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING )
889 p_obj->i_fg_pc = bs_read( s, 8 );
890 p_obj->i_bg_pc = bs_read( s, 8 );
891 i_processed_length += 2;
896 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
898 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
899 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
900 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
902 static void decode_object( decoder_t *p_dec, bs_t *s )
904 decoder_sys_t *p_sys = p_dec->p_sys;
905 dvbsub_region_t *p_region;
906 int i_segment_length, i_coding_method, i_version, i_id, i;
907 vlc_bool_t b_non_modify_color;
909 /* ETSI 300-743 paragraph 7.2.4
910 * sync_byte, segment_type and page_id have already been processed.
912 i_segment_length = bs_read( s, 16 );
913 i_id = bs_read( s, 16 );
914 i_version = bs_read( s, 4 );
915 i_coding_method = bs_read( s, 2 );
917 if( i_coding_method > 1 )
919 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
920 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
924 /* Check if the object needs to be rendered in at least one
926 for( p_region = p_sys->p_regions; p_region != NULL;
927 p_region = p_region->p_next )
929 for( i = 0; i < p_region->i_object_defs; i++ )
930 if( p_region->p_object_defs[i].i_id == i_id ) break;
932 if( i != p_region->i_object_defs ) break;
936 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
941 msg_Dbg( p_dec, "new object: %i", i_id );
944 b_non_modify_color = bs_read( s, 1 );
945 bs_skip( s, 1 ); /* Reserved */
947 if( i_coding_method == 0x00 )
949 int i_topfield, i_bottomfield;
950 uint8_t *p_topfield, *p_bottomfield;
952 i_topfield = bs_read( s, 16 );
953 i_bottomfield = bs_read( s, 16 );
954 p_topfield = s->p_start + bs_pos( s ) / 8;
955 p_bottomfield = p_topfield + i_topfield;
957 bs_skip( s, 8 * (i_segment_length - 7) );
960 if( i_segment_length < i_topfield + i_bottomfield + 7 ||
961 p_topfield + i_topfield + i_bottomfield > s->p_end )
963 msg_Dbg( p_dec, "corrupted object data" );
967 for( p_region = p_sys->p_regions; p_region != NULL;
968 p_region = p_region->p_next )
970 for( i = 0; i < p_region->i_object_defs; i++ )
972 if( p_region->p_object_defs[i].i_id != i_id ) continue;
974 dvbsub_render_pdata( p_dec, p_region,
975 p_region->p_object_defs[i].i_x,
976 p_region->p_object_defs[i].i_y,
977 p_topfield, i_topfield );
981 dvbsub_render_pdata( p_dec, p_region,
982 p_region->p_object_defs[i].i_x,
983 p_region->p_object_defs[i].i_y + 1,
984 p_bottomfield, i_bottomfield );
988 /* Duplicate the top field */
989 dvbsub_render_pdata( p_dec, p_region,
990 p_region->p_object_defs[i].i_x,
991 p_region->p_object_defs[i].i_y + 1,
992 p_topfield, i_topfield );
999 /* DVB subtitling as characters */
1000 int i_number_of_codes = bs_read( s, 8 );
1001 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1004 if( i_segment_length < i_number_of_codes*2 + 4 ||
1005 p_start + i_number_of_codes*2 > s->p_end )
1007 msg_Dbg( p_dec, "corrupted object data" );
1011 for( p_region = p_sys->p_regions; p_region != NULL;
1012 p_region = p_region->p_next )
1014 for( i = 0; i < p_region->i_object_defs; i++ )
1018 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1020 p_region->p_object_defs[i].psz_text =
1021 realloc( p_region->p_object_defs[i].psz_text,
1022 i_number_of_codes + 1 );
1024 for( j = 0; j < i_number_of_codes; j++ )
1026 p_region->p_object_defs[i].psz_text[j] = bs_read( s, 16 );
1028 p_region->p_object_defs[i].psz_text[j] = 0;
1034 msg_Dbg( p_dec, "end object: %i", i_id );
1038 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1040 uint8_t *p_field, int i_field )
1047 if( !p_region->p_pixbuf )
1049 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1052 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1053 i_x >= p_region->i_width )
1055 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1059 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1060 bs_init( &bs, p_field, i_field );
1062 while( !bs_eof( &bs ) )
1065 if( i_y >= p_region->i_height ) return;
1067 switch( bs_read( &bs, 8 ) )
1070 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1075 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1080 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1087 /* We don't use map tables */
1090 case 0xf0: /* End of line code */
1091 p_pixbuf += 2*p_region->i_width;
1092 i_offset = 0; i_y += 2;
1098 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1100 vlc_bool_t b_stop = 0;
1102 while( !b_stop && !bs_eof( s ) )
1104 int i_count = 0, i_color = 0;
1106 if( (i_color = bs_read( s, 2 )) != 0x00 )
1112 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1114 i_count = 3 + bs_read( s, 3 );
1115 i_color = bs_read( s, 2 );
1119 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1121 switch( bs_read( s, 2 ) ) //Switch3
1130 i_count = 12 + bs_read( s, 4 );
1131 i_color = bs_read( s, 2 );
1134 i_count = 29 + bs_read( s, 8 );
1135 i_color = bs_read( s, 2 );
1143 /* 1 pixel color 0 */
1149 if( !i_count ) continue;
1152 if( i_count + *pi_off > i_width ) break;
1154 if( i_count == 1 ) p[*pi_off] = i_color;
1155 else memset( p + *pi_off, i_color, i_count );
1157 (*pi_off) += i_count;
1163 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1165 vlc_bool_t b_stop = 0;
1167 while( !b_stop && !bs_eof( s ) )
1169 int i_count = 0, i_color = 0;
1171 if( (i_color = bs_read( s, 4 )) != 0x00 )
1178 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1180 if( bs_show( s, 3 ) != 0x00 )
1182 i_count = 2 + bs_read( s, 3 );
1192 if( bs_read( s, 1 ) == 0x00) //Switch2
1194 i_count = 4 + bs_read( s, 2 );
1195 i_color = bs_read( s, 4 );
1199 switch ( bs_read( s, 2 ) ) //Switch3
1208 i_count = 9 + bs_read( s, 4 );
1209 i_color = bs_read( s, 4 );
1212 i_count= 25 + bs_read( s, 8 );
1213 i_color = bs_read( s, 4 );
1220 if( !i_count ) continue;
1223 if( i_count + *pi_off > i_width ) break;
1225 if( i_count == 1 ) p[*pi_off] = i_color;
1226 else memset( p + *pi_off, i_color, i_count );
1228 (*pi_off) += i_count;
1234 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1236 vlc_bool_t b_stop = 0;
1238 while( !b_stop && !bs_eof( s ) )
1240 int i_count = 0, i_color = 0;
1242 if( (i_color = bs_read( s, 8 )) != 0x00 )
1249 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1251 if( bs_show( s, 7 ) != 0x00 )
1253 i_count = bs_read( s, 7 );
1263 i_count = bs_read( s, 7 );
1264 i_color = bs_read( s, 8 );
1268 if( !i_count ) continue;
1271 if( i_count + *pi_off > i_width ) break;
1273 if( i_count == 1 ) p[*pi_off] = i_color;
1274 else memset( p + *pi_off, i_color, i_count );
1276 (*pi_off) += i_count;
1282 static void free_all( decoder_t *p_dec )
1284 decoder_sys_t *p_sys = p_dec->p_sys;
1285 dvbsub_region_t *p_reg, *p_reg_next;
1286 dvbsub_clut_t *p_clut, *p_clut_next;
1288 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1290 p_clut_next = p_clut->p_next;
1293 p_sys->p_cluts = NULL;
1295 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1299 p_reg_next = p_reg->p_next;
1300 for( i = 0; i < p_reg->i_object_defs; i++ )
1301 if( p_reg->p_object_defs[i].psz_text )
1302 free( p_reg->p_object_defs[i].psz_text );
1303 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1304 if( p_reg->p_pixbuf ) free( p_reg->p_pixbuf );
1307 p_sys->p_regions = NULL;
1311 if( p_sys->p_page->i_region_defs )
1312 free( p_sys->p_page->p_region_defs );
1313 free( p_sys->p_page );
1315 p_sys->p_page = NULL;
1318 static subpicture_t *render( decoder_t *p_dec )
1320 decoder_sys_t *p_sys = p_dec->p_sys;
1321 subpicture_t *p_spu;
1322 subpicture_region_t **pp_spu_region;
1323 int i, j, i_timeout = 0;
1325 /* Allocate the subpicture internal data. */
1326 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1327 if( !p_spu ) return NULL;
1329 pp_spu_region = &p_spu->p_region;
1331 /* Loop on region definitions */
1334 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1337 for( i = 0; p_sys->p_page && i < p_sys->p_page->i_region_defs; i++ )
1339 dvbsub_region_t *p_region;
1340 dvbsub_regiondef_t *p_regiondef;
1341 dvbsub_clut_t *p_clut;
1342 dvbsub_color_t *p_color;
1343 subpicture_region_t *p_spu_region;
1344 uint8_t *p_src, *p_dst;
1348 i_timeout = p_sys->p_page->i_timeout;
1350 p_regiondef = &p_sys->p_page->p_region_defs[i];
1353 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1354 p_regiondef->i_x, p_regiondef->i_y );
1357 /* Find associated region */
1358 for( p_region = p_sys->p_regions; p_region != NULL;
1359 p_region = p_region->p_next )
1361 if( p_regiondef->i_id == p_region->i_id ) break;
1366 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1370 /* Find associated CLUT */
1371 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1373 if( p_region->i_clut == p_clut->i_id ) break;
1377 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1381 /* Create new SPU region */
1382 memset( &fmt, 0, sizeof(video_format_t) );
1383 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1384 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1385 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1386 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1387 fmt.i_x_offset = fmt.i_y_offset = 0;
1388 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1391 msg_Err( p_dec, "cannot allocate SPU region" );
1394 p_spu_region->i_x = p_regiondef->i_x;
1395 p_spu_region->i_y = p_regiondef->i_y;
1396 *pp_spu_region = p_spu_region;
1397 pp_spu_region = &p_spu_region->p_next;
1400 fmt.p_palette->i_entries = p_region->i_depth == 1 ? 4 :
1401 p_region->i_depth == 2 ? 16 : 256;
1402 p_color = (p_region->i_depth == 1) ? p_clut->c_2b :
1403 (p_region->i_depth == 2) ? p_clut->c_4b : p_clut->c_8b;
1404 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1406 fmt.p_palette->palette[j][0] = p_color[j].Y;
1407 fmt.p_palette->palette[j][1] = p_color[j].Cr;
1408 fmt.p_palette->palette[j][2] = p_color[j].Cb;
1409 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1412 p_src = p_region->p_pixbuf;
1413 p_dst = p_spu_region->picture.Y_PIXELS;
1414 i_pitch = p_spu_region->picture.Y_PITCH;
1416 /* Copy pixel buffer */
1417 for( j = 0; j < p_region->i_height; j++ )
1419 memcpy( p_dst, p_src, p_region->i_width );
1420 p_src += p_region->i_width;
1424 /* Check subtitles encoded as strings of characters
1425 * (since there are not rendered in the pixbuffer) */
1426 for( j = 0; j < p_region->i_object_defs; j++ )
1428 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1430 if( p_object_def->i_type != 1 || !p_object_def->psz_text )
1433 /* Create new SPU region */
1434 memset( &fmt, 0, sizeof(video_format_t) );
1435 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
1436 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1437 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1438 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1439 fmt.i_x_offset = fmt.i_y_offset = 0;
1440 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1443 msg_Err( p_dec, "cannot allocate SPU region" );
1447 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1448 p_spu_region->i_x = p_regiondef->i_x + p_object_def->i_x;
1449 p_spu_region->i_y = p_regiondef->i_y + p_object_def->i_y;
1450 *pp_spu_region = p_spu_region;
1451 pp_spu_region = &p_spu_region->p_next;
1455 /* Set the pf_render callback */
1456 p_spu->i_start = p_sys->i_pts;
1457 p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1458 p_spu->b_ephemer = VLC_TRUE;
1459 p_spu->b_fade = VLC_TRUE;
1461 /* Correct positioning of SPU */
1462 p_spu->b_absolute = p_sys->b_absolute;
1463 p_spu->i_flags = p_sys->i_spu_position;
1464 p_spu->i_x = p_sys->i_spu_x;
1465 p_spu->i_y = p_sys->i_spu_y;
1470 /*****************************************************************************
1471 * encoder_sys_t : encoder descriptor
1472 *****************************************************************************/
1473 typedef struct encoder_region_t
1480 struct encoder_sys_t
1482 unsigned int i_page_ver;
1483 unsigned int i_region_ver;
1484 unsigned int i_clut_ver;
1487 encoder_region_t *p_regions;
1491 /* subpicture positioning */
1496 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1497 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1498 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1499 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1501 /*****************************************************************************
1502 * OpenEncoder: probe the encoder and return score
1503 *****************************************************************************/
1504 static int OpenEncoder( vlc_object_t *p_this )
1506 encoder_t *p_enc = (encoder_t *)p_this;
1507 encoder_sys_t *p_sys;
1510 if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','v','b','s') &&
1513 return VLC_EGENERIC;
1516 /* Allocate the memory needed to store the decoder's structure */
1517 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1519 msg_Err( p_enc, "out of memory" );
1522 p_enc->p_sys = p_sys;
1524 p_enc->pf_encode_sub = Encode;
1525 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1526 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1528 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1530 p_sys->i_page_ver = 0;
1531 p_sys->i_region_ver = 0;
1532 p_sys->i_clut_ver = 0;
1533 p_sys->i_regions = 0;
1534 p_sys->p_regions = 0;
1536 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1537 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1538 p_sys->i_offset_x = val.i_int;
1539 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1540 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1541 p_sys->i_offset_y = val.i_int;
1546 /* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
1547 * into VLC_FOURCC('Y','U','V','P')
1549 static subpicture_t *YuvaYuvp( encoder_t *p_enc, subpicture_t *p_subpic )
1551 subpicture_region_t *p_region = NULL;
1553 if( !p_subpic ) return NULL;
1555 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1557 video_format_t *p_fmt = &p_region->fmt;
1558 int i = 0, j = 0, n = 0, p = 0;
1559 int i_max_entries = 256;
1561 #ifdef RANDOM_DITHERING
1562 int i_seed = 0xdeadbeef; /* random seed */
1566 int i_pixels = p_region->picture.p[0].i_visible_lines
1567 * p_region->picture.p[0].i_pitch;
1568 int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
1569 * p_region->picture.p[0].i_pitch
1570 + p_region->picture.p[0].i_pitch * 1 / 3;
1571 int i_tolerance = 0;
1574 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1576 p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
1577 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1578 if( !p_fmt->p_palette ) break;
1579 p_fmt->p_palette->i_entries = 0;
1581 /* Find best iterator using Euclide’s algorithm */
1582 for( ; i_iterator > 1 ; i_iterator-- )
1601 /* Count colors, build best palette */
1602 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1604 vlc_bool_t b_success = VLC_TRUE;
1605 p_fmt->p_palette->i_entries = 0;
1607 for( i = 0; i < i_pixels ; )
1610 y = p_region->picture.p[0].p_pixels[i];
1611 u = p_region->picture.p[1].p_pixels[i];
1612 v = p_region->picture.p[2].p_pixels[i];
1613 a = p_region->picture.p[3].p_pixels[i];
1614 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1616 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1617 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1618 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1619 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1624 if( j == p_fmt->p_palette->i_entries )
1626 p_fmt->p_palette->palette[j][0] = y;
1627 p_fmt->p_palette->palette[j][1] = u;
1628 p_fmt->p_palette->palette[j][2] = v;
1629 p_fmt->p_palette->palette[j][3] = a;
1630 p_fmt->p_palette->i_entries++;
1632 if( p_fmt->p_palette->i_entries >= i_max_entries )
1634 b_success = VLC_FALSE;
1651 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1654 #ifndef RANDOM_DITHERING
1655 pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
1656 * sizeof(int) * 4 );
1657 for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
1663 /* Fill image with our new colours */
1664 for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
1666 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1668 for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
1670 int i_offset = p * p_region->picture.p[0].i_pitch + n;
1672 int i_mindist, i_best;
1674 y = (int)p_region->picture.p[0].p_pixels[i_offset];
1675 u = (int)p_region->picture.p[1].p_pixels[i_offset];
1676 v = (int)p_region->picture.p[2].p_pixels[i_offset];
1677 a = (int)p_region->picture.p[3].p_pixels[i_offset];
1679 /* Add dithering compensation */
1680 #ifdef RANDOM_DITHERING
1681 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1682 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1683 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1684 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1686 y += i_ydelta + pi_delta[ n * 4 ];
1687 u += i_udelta + pi_delta[ n * 4 + 1 ];
1688 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1689 a += i_adelta + pi_delta[ n * 4 + 3 ];
1692 /* Find best colour in palette */
1693 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1697 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1698 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1699 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1700 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1702 if( i_dist < i_mindist )
1709 /* Set pixel to best color */
1710 p_region->picture.p[0].p_pixels[i_offset] = i_best;
1712 /* Update dithering state */
1713 #ifdef RANDOM_DITHERING
1714 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1716 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1717 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1718 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1719 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1720 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1721 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1722 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1723 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1724 i_ydelta = i_ydelta * 5 / 8;
1725 i_udelta = i_udelta * 5 / 8;
1726 i_vdelta = i_vdelta * 5 / 8;
1727 i_adelta = i_adelta * 5 / 8;
1731 #ifndef RANDOM_DITHERING
1736 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1738 p_fmt->p_palette->palette[i][0] = 0;
1739 p_fmt->p_palette->palette[i][1] = 0;
1740 p_fmt->p_palette->palette[i][2] = 0;
1741 p_fmt->p_palette->palette[i][3] = 0;
1743 p_fmt->p_palette->i_entries = i_max_entries;
1745 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1751 /****************************************************************************
1752 * Encode: the whole thing
1753 ****************************************************************************/
1754 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1756 subpicture_t *p_temp = NULL;
1757 subpicture_region_t *p_region = NULL;
1758 bs_t bits, *s = &bits;
1761 if( !p_subpic || !p_subpic->p_region ) return NULL;
1763 /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
1764 * VLC_FOURCC('Y','U','V','P')
1766 p_region = p_subpic->p_region;
1767 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
1769 p_temp = YuvaYuvp( p_enc, p_subpic );
1772 msg_Err( p_enc, "no picture in subpicture" );
1775 p_region = p_subpic->p_region;
1779 if( !p_region ) return NULL;
1781 if( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') &&
1782 p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return NULL;
1784 if( p_region->fmt.p_palette )
1786 switch( p_region->fmt.p_palette->i_entries )
1794 msg_Err( p_enc, "subpicture palette (%d) not handled",
1795 p_region->fmt.p_palette->i_entries );
1802 msg_Dbg( p_enc, "encoding subpicture" );
1804 p_block = block_New( p_enc, 64000 );
1805 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1807 bs_write( s, 8, 0x20 ); /* Data identifier */
1808 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1810 encode_page_composition( p_enc, s, p_subpic );
1811 encode_region_composition( p_enc, s, p_subpic );
1812 encode_clut( p_enc, s, p_subpic );
1813 encode_object( p_enc, s, p_subpic );
1815 /* End of display */
1816 bs_write( s, 8, 0x0f ); /* Sync byte */
1817 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1818 bs_write( s, 16, 1 ); /* Page id */
1819 bs_write( s, 16, 0 ); /* Segment length */
1821 bs_write( s, 8, 0xff );/* End marker */
1822 p_block->i_buffer = bs_pos( s ) / 8;
1823 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1824 if( !p_subpic->b_ephemer && p_subpic->i_stop > p_subpic->i_start )
1826 block_t *p_block_stop;
1828 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1830 /* Send another (empty) subtitle to signal the end of display */
1831 p_block_stop = block_New( p_enc, 64000 );
1832 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1833 bs_write( s, 8, 0x20 ); /* Data identifier */
1834 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1835 encode_page_composition( p_enc, s, 0 );
1836 bs_write( s, 8, 0x0f ); /* Sync byte */
1837 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1838 bs_write( s, 16, 1 ); /* Page id */
1839 bs_write( s, 16, 0 ); /* Segment length */
1840 bs_write( s, 8, 0xff );/* End marker */
1841 p_block_stop->i_buffer = bs_pos( s ) / 8;
1842 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
1843 block_ChainAppend( &p_block, p_block_stop );
1844 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
1847 msg_Dbg( p_enc, "subpicture encoded properly" );
1852 /*****************************************************************************
1853 * CloseEncoder: encoder destruction
1854 *****************************************************************************/
1855 static void CloseEncoder( vlc_object_t *p_this )
1857 encoder_t *p_enc = (encoder_t *)p_this;
1858 encoder_sys_t *p_sys = p_enc->p_sys;
1860 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
1861 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
1862 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
1864 if( p_sys->i_regions ) free( p_sys->p_regions );
1868 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
1869 subpicture_t *p_subpic )
1871 encoder_sys_t *p_sys = p_enc->p_sys;
1872 subpicture_region_t *p_region;
1873 vlc_bool_t b_mode_change = VLC_FALSE;
1874 int i_regions, i_timeout;
1876 bs_write( s, 8, 0x0f ); /* Sync byte */
1877 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
1878 bs_write( s, 16, 1 ); /* Page id */
1880 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
1881 p_region; p_region = p_region->p_next, i_regions++ )
1883 if( i_regions >= p_sys->i_regions )
1885 encoder_region_t region;
1886 region.i_width = region.i_height = 0;
1888 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
1889 (p_sys->i_regions + 1) );
1890 p_sys->p_regions[p_sys->i_regions++] = region;
1893 if( ( p_sys->p_regions[i_regions].i_width <
1894 (int)p_region->fmt.i_visible_width ) ||
1895 ( p_sys->p_regions[i_regions].i_width >
1896 (int)p_region->fmt.i_visible_width ) )
1898 b_mode_change = VLC_TRUE;
1899 msg_Dbg( p_enc, "region %i width change: %i -> %i",
1900 i_regions, p_sys->p_regions[i_regions].i_width,
1901 p_region->fmt.i_visible_width );
1902 p_sys->p_regions[i_regions].i_width =
1903 p_region->fmt.i_visible_width;
1905 if( p_sys->p_regions[i_regions].i_height <
1906 (int)p_region->fmt.i_visible_height )
1908 b_mode_change = VLC_TRUE;
1909 msg_Dbg( p_enc, "region %i height change: %i -> %i",
1910 i_regions, p_sys->p_regions[i_regions].i_height,
1911 p_region->fmt.i_visible_height );
1912 p_sys->p_regions[i_regions].i_height =
1913 p_region->fmt.i_visible_height;
1917 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
1920 if( p_subpic && !p_subpic->b_ephemer &&
1921 p_subpic->i_stop > p_subpic->i_start )
1923 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
1926 bs_write( s, 8, i_timeout ); /* Timeout */
1927 bs_write( s, 4, p_sys->i_page_ver++ );
1928 bs_write( s, 2, b_mode_change ?
1929 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
1930 bs_write( s, 2, 0 ); /* Reserved */
1932 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
1933 p_region; p_region = p_region->p_next, i_regions++ )
1935 bs_write( s, 8, i_regions );
1936 bs_write( s, 8, 0 ); /* Reserved */
1937 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
1939 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
1940 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
1944 bs_write( s, 16, p_region->i_x );
1945 bs_write( s, 16, p_region->i_y );
1950 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
1952 encoder_sys_t *p_sys = p_enc->p_sys;
1953 subpicture_region_t *p_region = p_subpic->p_region;
1954 video_palette_t *p_pal, pal;
1958 if( !p_region ) return;
1960 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
1962 p_pal = p_region->fmt.p_palette;
1967 for( i = 0; i < 4; i++ )
1969 pal.palette[i][0] = 0;
1970 pal.palette[i][1] = 0;
1971 pal.palette[i][2] = 0;
1972 pal.palette[i][3] = 0;
1977 bs_write( s, 8, 0x0f ); /* Sync byte */
1978 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
1979 bs_write( s, 16, 1 ); /* Page id */
1981 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
1982 bs_write( s, 8, 1 ); /* Clut id */
1983 bs_write( s, 4, p_sys->i_clut_ver++ );
1984 bs_write( s, 4, 0 ); /* Reserved */
1986 for( i = 0; i < p_pal->i_entries; i++ )
1988 bs_write( s, 8, i ); /* Clut entry id */
1989 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
1990 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
1991 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
1992 bs_write( s, 4, 0 ); /* Reserved */
1993 bs_write( s, 1, 1 ); /* Full range flag */
1994 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
1995 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
1996 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
1997 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
1998 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2002 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2003 subpicture_t *p_subpic )
2005 encoder_sys_t *p_sys = p_enc->p_sys;
2006 subpicture_region_t *p_region;
2009 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2010 p_region = p_region->p_next, i_region++ )
2012 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2014 p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T');
2018 video_palette_t *p_pal = p_region->fmt.p_palette;
2022 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2026 i_entries = p_pal->i_entries;
2027 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2029 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2031 if( !p_pal->palette[i_bg][3] ) break;
2035 bs_write( s, 8, 0x0f ); /* Sync byte */
2036 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2037 bs_write( s, 16, 1 ); /* Page id */
2039 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2040 bs_write( s, 8, i_region );
2041 bs_write( s, 4, p_sys->i_region_ver++ );
2043 /* Region attributes */
2044 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2045 bs_write( s, 3, 0 ); /* Reserved */
2046 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2047 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2048 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2049 bs_write( s, 3, i_depth ); /* Region depth */
2050 bs_write( s, 2, 0 ); /* Reserved */
2051 bs_write( s, 8, 1 ); /* Clut id */
2052 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2053 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2054 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2055 bs_write( s, 2, 0 ); /* Reserved */
2057 /* In our implementation we only have 1 object per region */
2058 bs_write( s, 16, i_region );
2059 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2060 bs_write( s, 2, 0 ); /* object provider flag */
2061 bs_write( s, 12, 0 );/* object horizontal position */
2062 bs_write( s, 4, 0 ); /* Reserved */
2063 bs_write( s, 12, 0 );/* object vertical position */
2067 bs_write( s, 8, 1 ); /* foreground pixel code */
2068 bs_write( s, 8, 0 ); /* background pixel code */
2073 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2074 subpicture_region_t *p_region,
2077 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2079 encoder_sys_t *p_sys = p_enc->p_sys;
2080 subpicture_region_t *p_region;
2083 int i_length_pos, i_update_pos, i_pixel_data_pos;
2085 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2086 p_region = p_region->p_next, i_region++ )
2088 bs_write( s, 8, 0x0f ); /* Sync byte */
2089 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2090 bs_write( s, 16, 1 ); /* Page id */
2092 i_length_pos = bs_pos( s );
2093 bs_write( s, 16, 0 ); /* Segment length */
2094 bs_write( s, 16, i_region ); /* Object id */
2095 bs_write( s, 4, p_sys->i_region_ver++ );
2097 /* object coding method */
2098 switch( p_region->fmt.i_chroma )
2100 case VLC_FOURCC( 'Y','U','V','P' ):
2101 bs_write( s, 2, 0 );
2103 case VLC_FOURCC( 'T','E','X','T' ):
2104 bs_write( s, 2, 1 );
2107 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2111 bs_write( s, 1, 0 ); /* non modifying color flag */
2112 bs_write( s, 1, 0 ); /* Reserved */
2114 if( p_region->fmt.i_chroma == VLC_FOURCC( 'T','E','X','T' ) )
2118 if( !p_region->psz_text ) continue;
2120 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2122 bs_write( s, 8, i_size ); /* number of characters in string */
2123 for( i = 0; i < i_size; i++ )
2125 bs_write( s, 16, p_region->psz_text[i] );
2128 /* Update segment length */
2129 SetWBE( &s->p_start[i_length_pos/8],
2130 (bs_pos(s) - i_length_pos)/8 -2 );
2134 /* Coding of a bitmap object */
2135 i_update_pos = bs_pos( s );
2136 bs_write( s, 16, 0 ); /* topfield data block length */
2137 bs_write( s, 16, 0 ); /* bottomfield data block length */
2140 i_pixel_data_pos = bs_pos( s );
2141 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
2142 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2143 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2146 i_pixel_data_pos = bs_pos( s );
2147 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
2148 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2149 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2151 /* Stuffing for word alignment */
2153 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2155 /* Update segment length */
2156 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2160 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2161 subpicture_region_t *p_region,
2163 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2164 subpicture_region_t *p_region,
2166 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2167 subpicture_region_t *p_region,
2169 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2170 subpicture_region_t *p_region,
2173 unsigned int i_line;
2176 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
2178 /* Encode line by line */
2179 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2182 switch( p_region->fmt.p_palette->i_entries )
2188 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2189 encode_pixel_line_2bp( p_enc, s, p_region, i_line );
2193 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2194 encode_pixel_line_4bp( p_enc, s, p_region, i_line );
2198 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2199 encode_pixel_line_8bp( p_enc, s, p_region, i_line );
2203 msg_Err( p_enc, "subpicture palette (%i) not handled",
2204 p_region->fmt.p_palette->i_entries );
2208 bs_write( s, 8, 0xf0 ); /* End of object line code */
2212 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2213 subpicture_region_t *p_region,
2216 unsigned int i, i_length = 0;
2217 int i_pitch = p_region->picture.p->i_pitch;
2218 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2219 int i_last_pixel = p_data[0];
2221 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2223 if( i != p_region->fmt.i_visible_width &&
2224 p_data[i] == i_last_pixel && i_length != 284 )
2230 if( i_length == 1 || i_length == 11 || i_length == 28 )
2232 /* 2bit/pixel code */
2233 if( i_last_pixel ) bs_write( s, 2, i_last_pixel );
2236 bs_write( s, 2, 0 );
2237 bs_write( s, 1, 0 );
2238 bs_write( s, 1, 1 ); /* pseudo color 0 */
2247 bs_write( s, 2, i_last_pixel );
2248 bs_write( s, 2, i_last_pixel );
2252 bs_write( s, 2, 0 );
2253 bs_write( s, 1, 0 );
2254 bs_write( s, 1, 0 );
2255 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2258 else if( i_length > 2 )
2260 bs_write( s, 2, 0 );
2261 if( i_length <= 10 )
2263 bs_write( s, 1, 1 );
2264 bs_write( s, 3, i_length - 3 );
2265 bs_write( s, 2, i_last_pixel );
2269 bs_write( s, 1, 0 );
2270 bs_write( s, 1, 0 );
2272 if( i_length <= 27 )
2274 bs_write( s, 2, 2 );
2275 bs_write( s, 4, i_length - 12 );
2276 bs_write( s, 2, i_last_pixel );
2280 bs_write( s, 2, 3 );
2281 bs_write( s, 8, i_length - 29 );
2282 bs_write( s, 2, i_last_pixel );
2287 if( i == p_region->fmt.i_visible_width ) break;
2289 i_last_pixel = p_data[i];
2294 bs_write( s, 2, 0 );
2295 bs_write( s, 1, 0 );
2296 bs_write( s, 1, 0 );
2297 bs_write( s, 2, 0 );
2303 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2304 subpicture_region_t *p_region,
2307 unsigned int i, i_length = 0;
2308 int i_pitch = p_region->picture.p->i_pitch;
2309 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2310 int i_last_pixel = p_data[0];
2312 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2314 if( i != p_region->fmt.i_visible_width &&
2315 p_data[i] == i_last_pixel && i_length != 280 )
2321 if( i_length == 1 || (i_length == 3 && i_last_pixel) || i_length == 8 )
2323 /* 4bit/pixel code */
2324 if( i_last_pixel ) bs_write( s, 4, i_last_pixel );
2327 bs_write( s, 4, 0 );
2328 bs_write( s, 1, 1 );
2329 bs_write( s, 1, 1 );
2330 bs_write( s, 2, 0 ); /* pseudo color 0 */
2339 bs_write( s, 4, i_last_pixel );
2340 bs_write( s, 4, i_last_pixel );
2344 bs_write( s, 4, 0 );
2345 bs_write( s, 1, 1 );
2346 bs_write( s, 1, 1 );
2347 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2350 else if( !i_last_pixel && i_length >= 3 && i_length <= 9 )
2352 bs_write( s, 4, 0 );
2353 bs_write( s, 1, 0 );
2354 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2356 else if( i_length > 2 )
2358 bs_write( s, 4, 0 );
2359 bs_write( s, 1, 1 );
2363 bs_write( s, 1, 0 );
2364 bs_write( s, 2, i_length - 4 );
2365 bs_write( s, 4, i_last_pixel );
2369 bs_write( s, 1, 1 );
2371 if( i_length <= 24 )
2373 bs_write( s, 2, 2 );
2374 bs_write( s, 4, i_length - 9 );
2375 bs_write( s, 4, i_last_pixel );
2379 bs_write( s, 2, 3 );
2380 bs_write( s, 8, i_length - 25 );
2381 bs_write( s, 4, i_last_pixel );
2386 if( i == p_region->fmt.i_visible_width ) break;
2388 i_last_pixel = p_data[i];
2393 bs_write( s, 8, 0 );
2399 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2400 subpicture_region_t *p_region,
2403 unsigned int i, i_length = 0;
2404 int i_pitch = p_region->picture.p->i_pitch;
2405 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2406 int i_last_pixel = p_data[0];
2408 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2410 if( i != p_region->fmt.i_visible_width &&
2411 p_data[i] == i_last_pixel && i_length != 127 )
2417 if( i_length == 1 && i_last_pixel )
2419 /* 8bit/pixel code */
2420 bs_write( s, 8, i_last_pixel );
2422 else if( i_length == 2 && i_last_pixel )
2424 /* 8bit/pixel code */
2425 bs_write( s, 8, i_last_pixel );
2426 bs_write( s, 8, i_last_pixel );
2428 else if( i_length <= 127 )
2430 bs_write( s, 8, 0 );
2434 bs_write( s, 1, 0 );
2435 bs_write( s, 7, i_length ); /* pseudo color 0 */
2439 bs_write( s, 1, 1 );
2440 bs_write( s, 7, i_length );
2441 bs_write( s, 8, i_last_pixel );
2445 if( i == p_region->fmt.i_visible_width ) break;
2447 i_last_pixel = p_data[i];
2452 bs_write( s, 8, 0 );
2453 bs_write( s, 8, 0 );