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 #define TIMEOUT_TEXT N_("Timeout")
63 #define TIMEOUT_LONGTEXT N_( \
64 "Subpictures get a default timeout of 15 seconds added to their " \
66 "This will ensure that they are at least the specified time visible.")
68 static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
69 static char *ppsz_pos_descriptions[] =
70 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
71 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
73 /*****************************************************************************
75 *****************************************************************************/
76 static int Open ( vlc_object_t * );
77 static void Close( vlc_object_t * );
78 static subpicture_t *Decode( decoder_t *, block_t ** );
80 static int OpenEncoder ( vlc_object_t * );
81 static void CloseEncoder( vlc_object_t * );
82 static block_t *Encode ( encoder_t *, subpicture_t * );
85 # define DVBSUB_CFG_PREFIX "dvbsub-"
86 set_description( _("DVB subtitles decoder") );
87 set_capability( "decoder", 50 );
88 set_category( CAT_INPUT );
89 set_subcategory( SUBCAT_INPUT_SCODEC );
90 set_callbacks( Open, Close );
92 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, VLC_TRUE );
93 change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
94 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
95 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
97 # define ENC_CFG_PREFIX "sout-dvbsub-"
99 set_description( _("DVB subtitles encoder") );
100 set_capability( "encoder", 100 );
101 set_callbacks( OpenEncoder, CloseEncoder );
103 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, VLC_FALSE );
104 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, VLC_FALSE );
105 add_integer( ENC_CFG_PREFIX "timeout", 15, NULL, TIMEOUT_TEXT, TIMEOUT_LONGTEXT, VLC_FALSE );
108 static const char *ppsz_enc_options[] = { NULL };
110 /****************************************************************************
112 ****************************************************************************
113 * Those structures refer closely to the ETSI 300 743 Object model
114 ****************************************************************************/
116 /* The object definition gives the position of the object in a region */
117 typedef struct dvbsub_objectdef_s
125 char *psz_text; /* for string of characters objects */
127 } dvbsub_objectdef_t;
129 /* The entry in the palette CLUT */
140 typedef struct dvbsub_clut_s
144 dvbsub_color_t c_2b[4];
145 dvbsub_color_t c_4b[16];
146 dvbsub_color_t c_8b[256];
148 struct dvbsub_clut_s *p_next;
152 /* The Region is an aera on the image
153 * with a list of the object definitions associated and a CLUT */
154 typedef struct dvbsub_region_s
169 dvbsub_objectdef_t *p_object_defs;
171 struct dvbsub_region_s *p_next;
175 /* The object definition gives the position of the object in a region */
176 typedef struct dvbsub_regiondef_s
182 } dvbsub_regiondef_t;
184 /* The page defines the list of regions */
188 int i_timeout; /* in seconds */
193 dvbsub_regiondef_t *p_region_defs;
201 /* Decoder internal data */
206 vlc_bool_t b_absolute;
212 dvbsub_page_t *p_page;
213 dvbsub_region_t *p_regions;
214 dvbsub_clut_t *p_cluts;
215 dvbsub_clut_t default_clut;
219 /* List of different SEGMENT TYPES */
220 /* According to EN 300-743, table 2 */
221 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
222 #define DVBSUB_ST_REGION_COMPOSITION 0x11
223 #define DVBSUB_ST_CLUT_DEFINITION 0x12
224 #define DVBSUB_ST_OBJECT_DATA 0x13
225 #define DVBSUB_ST_ENDOFDISPLAY 0x80
226 #define DVBSUB_ST_STUFFING 0xff
227 /* List of different OBJECT TYPES */
228 /* According to EN 300-743, table 6 */
229 #define DVBSUB_OT_BASIC_BITMAP 0x00
230 #define DVBSUB_OT_BASIC_CHAR 0x01
231 #define DVBSUB_OT_COMPOSITE_STRING 0x02
232 /* Pixel DATA TYPES */
233 /* According to EN 300-743, table 9 */
234 #define DVBSUB_DT_2BP_CODE_STRING 0x10
235 #define DVBSUB_DT_4BP_CODE_STRING 0x11
236 #define DVBSUB_DT_8BP_CODE_STRING 0x12
237 #define DVBSUB_DT_24_TABLE_DATA 0x20
238 #define DVBSUB_DT_28_TABLE_DATA 0x21
239 #define DVBSUB_DT_48_TABLE_DATA 0x22
240 #define DVBSUB_DT_END_LINE 0xf0
241 /* List of different Page Composition Segment state */
242 /* According to EN 300-743, 7.2.1 table 3 */
243 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
244 #define DVBSUB_PCS_STATE_CHANGE 0x02
246 /*****************************************************************************
248 *****************************************************************************/
249 static void decode_segment( decoder_t *, bs_t * );
250 static void decode_page_composition( decoder_t *, bs_t * );
251 static void decode_region_composition( decoder_t *, bs_t * );
252 static void decode_object( decoder_t *, bs_t * );
253 static void decode_clut( decoder_t *, bs_t * );
254 static void free_all( decoder_t * );
256 static void default_clut_init( decoder_t * );
258 static subpicture_t *render( decoder_t * );
260 /*****************************************************************************
261 * Open: probe the decoder and return score
262 *****************************************************************************
263 * Tries to launch a decoder and return score so that the interface is able
265 *****************************************************************************/
266 static int Open( vlc_object_t *p_this )
268 decoder_t *p_dec = (decoder_t *) p_this;
269 decoder_sys_t *p_sys;
273 if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','v','b','s') )
278 p_dec->pf_decode_sub = Decode;
279 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
280 memset( p_sys, 0, sizeof(decoder_sys_t) );
282 p_sys->i_pts = (mtime_t) 0;
283 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
284 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
286 p_sys->p_regions = NULL;
287 p_sys->p_cluts = NULL;
288 p_sys->p_page = NULL;
290 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
291 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
292 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
293 p_sys->i_spu_position = val.i_int;
294 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
295 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
296 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
298 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
299 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
300 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
303 /* Check if subpicture position was overridden */
304 p_sys->b_absolute = VLC_TRUE;
305 p_sys->i_spu_x = p_sys->i_spu_y = 0;
307 if( i_posx >= 0 && i_posy >= 0 )
309 p_sys->b_absolute = VLC_FALSE;
310 p_sys->i_spu_x = i_posx;
311 p_sys->i_spu_y = i_posy;
314 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
316 default_clut_init( p_dec );
321 /*****************************************************************************
323 *****************************************************************************/
324 static void Close( vlc_object_t *p_this )
326 decoder_t *p_dec = (decoder_t*) p_this;
327 decoder_sys_t *p_sys = p_dec->p_sys;
329 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
330 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
331 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
337 /*****************************************************************************
339 *****************************************************************************/
340 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
342 decoder_sys_t *p_sys = p_dec->p_sys;
344 subpicture_t *p_spu = NULL;
346 if( pp_block == NULL || *pp_block == NULL ) return NULL;
350 p_sys->i_pts = p_block->i_pts;
351 if( p_sys->i_pts <= 0 )
354 /* Some DVB channels send stuffing segments in non-dated packets so
355 * don't complain too loudly. */
356 msg_Warn( p_dec, "non dated subtitle" );
358 block_Release( p_block );
362 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
364 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
366 msg_Dbg( p_dec, "invalid data identifier" );
367 block_Release( p_block );
371 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
373 msg_Dbg( p_dec, "invalid subtitle stream id" );
374 block_Release( p_block );
379 msg_Dbg( p_dec, "subtitle packet received: "I64Fd, p_sys->i_pts );
382 p_sys->b_page = VLC_FALSE;
383 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
385 decode_segment( p_dec, &p_sys->bs );
388 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
390 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
391 block_Release( p_block );
395 /* Check if the page is to be displayed */
396 if( p_sys->p_page && p_sys->b_page ) p_spu = render( p_dec );
398 block_Release( p_block );
403 /* following functions are local */
405 /*****************************************************************************
406 * default_clut_init: default clut as defined in EN 300-743 section 10
407 *****************************************************************************/
408 static void default_clut_init( decoder_t *p_dec )
410 decoder_sys_t *p_sys = p_dec->p_sys;
413 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
414 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
415 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
418 for( i = 0; i < 4; i++ )
420 uint8_t R = 0, G = 0, B = 0, T = 0;
422 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
423 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
424 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
425 else R = G = B = 0x7F;
427 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
428 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
429 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
430 p_sys->default_clut.c_2b[i].T = T;
433 /* 16 entries CLUT */
434 for( i = 0; i < 16; i++ )
436 uint8_t R = 0, G = 0, B = 0, T = 0;
440 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
446 R = (i & 0x1) ? 0xFF : 0;
447 G = (i & 0x2) ? 0xFF : 0;
448 B = (i & 0x4) ? 0xFF : 0;
453 R = (i & 0x1) ? 0x7F : 0;
454 G = (i & 0x2) ? 0x7F : 0;
455 B = (i & 0x4) ? 0x7F : 0;
458 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
459 p_sys->default_clut.c_4b[i].Cr = RGB_TO_U(R,G,B);
460 p_sys->default_clut.c_4b[i].Cb = RGB_TO_V(R,G,B);
461 p_sys->default_clut.c_4b[i].T = T;
464 /* 256 entries CLUT */
465 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
468 static void decode_segment( decoder_t *p_dec, bs_t *s )
470 decoder_sys_t *p_sys = p_dec->p_sys;
475 /* sync_byte (already checked) */
479 i_type = bs_read( s, 8 );
482 i_page_id = bs_read( s, 16 );
485 i_size = bs_show( s, 16 );
487 if( i_page_id != p_sys->i_id && i_page_id != p_sys->i_ancillary_id )
490 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
491 i_page_id, p_sys->i_id );
493 bs_skip( s, 8 * ( 2 + i_size ) );
497 if( p_sys->i_ancillary_id != p_sys->i_id &&
498 i_type == DVBSUB_ST_PAGE_COMPOSITION &&
499 i_page_id == p_sys->i_ancillary_id )
502 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
504 bs_skip( s, 8 * ( 2 + i_size ) );
509 if( i_page_id == p_sys->i_id )
510 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
512 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
517 case DVBSUB_ST_PAGE_COMPOSITION:
519 msg_Dbg( p_dec, "decode_page_composition" );
521 decode_page_composition( p_dec, s );
524 case DVBSUB_ST_REGION_COMPOSITION:
526 msg_Dbg( p_dec, "decode_region_composition" );
528 decode_region_composition( p_dec, s );
531 case DVBSUB_ST_CLUT_DEFINITION:
533 msg_Dbg( p_dec, "decode_clut" );
535 decode_clut( p_dec, s );
538 case DVBSUB_ST_OBJECT_DATA:
540 msg_Dbg( p_dec, "decode_object" );
542 decode_object( p_dec, s );
545 case DVBSUB_ST_ENDOFDISPLAY:
547 msg_Dbg( p_dec, "end of display" );
549 bs_skip( s, 8 * ( 2 + i_size ) );
552 case DVBSUB_ST_STUFFING:
554 msg_Dbg( p_dec, "skip stuffing" );
556 bs_skip( s, 8 * ( 2 + i_size ) );
560 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
561 bs_skip( s, 8 * ( 2 + i_size ) );
566 static void decode_clut( decoder_t *p_dec, bs_t *s )
568 decoder_sys_t *p_sys = p_dec->p_sys;
569 uint16_t i_segment_length;
570 uint16_t i_processed_length;
571 dvbsub_clut_t *p_clut, *p_next;
574 i_segment_length = bs_read( s, 16 );
575 i_id = bs_read( s, 8 );
576 i_version = bs_read( s, 4 );
578 /* Check if we already have this clut */
579 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
581 if( p_clut->i_id == i_id ) break;
584 /* Check version number */
585 if( p_clut && p_clut->i_version == i_version )
588 bs_skip( s, 8 * i_segment_length - 12 );
595 msg_Dbg( p_dec, "new clut: %i", i_id );
597 p_clut = malloc( sizeof(dvbsub_clut_t) );
598 p_clut->p_next = p_sys->p_cluts;
599 p_sys->p_cluts = p_clut;
602 /* Initialize to default clut */
603 p_next = p_clut->p_next;
604 *p_clut = p_sys->default_clut;
605 p_clut->p_next = p_next;
607 /* We don't have this version of the CLUT: Parse it */
608 p_clut->i_version = i_version;
610 bs_skip( s, 4 ); /* Reserved bits */
611 i_processed_length = 2;
612 while( i_processed_length < i_segment_length )
614 uint8_t y, cb, cr, t;
618 i_id = bs_read( s, 8 );
619 i_type = bs_read( s, 3 );
623 if( bs_read( s, 1 ) )
626 cr = bs_read( s, 8 );
627 cb = bs_read( s, 8 );
629 i_processed_length += 6;
633 y = bs_read( s, 6 ) << 2;
634 cr = bs_read( s, 4 ) << 4;
635 cb = bs_read( s, 4 ) << 4;
636 t = bs_read( s, 2 ) << 6;
637 i_processed_length += 4;
640 /* We are not entirely compliant here as full transparency is indicated
641 * with a luma value of zero, not a transparency value of 0xff
642 * (full transparency would actually be 0xff + 1). */
649 /* According to EN 300-743 section 7.2.3 note 1, type should
650 * not have more than 1 bit set to one, but some streams don't
651 * respect this note. */
652 if( i_type & 0x04 && i_id < 4 )
654 p_clut->c_2b[i_id].Y = y;
655 p_clut->c_2b[i_id].Cr = cr;
656 p_clut->c_2b[i_id].Cb = cb;
657 p_clut->c_2b[i_id].T = t;
659 if( i_type & 0x02 && i_id < 16 )
661 p_clut->c_4b[i_id].Y = y;
662 p_clut->c_4b[i_id].Cr = cr;
663 p_clut->c_4b[i_id].Cb = cb;
664 p_clut->c_4b[i_id].T = t;
668 p_clut->c_8b[i_id].Y = y;
669 p_clut->c_8b[i_id].Cr = cr;
670 p_clut->c_8b[i_id].Cb = cb;
671 p_clut->c_8b[i_id].T = t;
676 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
678 decoder_sys_t *p_sys = p_dec->p_sys;
679 int i_version, i_state, i_segment_length, i_timeout, i;
681 /* A page is composed by 0 or more region */
682 i_segment_length = bs_read( s, 16 );
683 i_timeout = bs_read( s, 8 );
684 i_version = bs_read( s, 4 );
685 i_state = bs_read( s, 2 );
686 bs_skip( s, 2 ); /* Reserved */
688 if( i_state == DVBSUB_PCS_STATE_CHANGE )
690 /* End of an epoch, reset decoder buffer */
692 msg_Dbg( p_dec, "page composition mode change" );
696 else if( !p_sys->p_page && i_state != DVBSUB_PCS_STATE_ACQUISITION &&
697 i_state != DVBSUB_PCS_STATE_CHANGE )
699 /* Not a full PCS, we need to wait for one */
700 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
703 /* Try to start decoding even without an acquisition page */
704 bs_skip( s, 8 * (i_segment_length - 2) );
710 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
711 msg_Dbg( p_dec, "acquisition page composition" );
714 /* Check version number */
715 if( p_sys->p_page && p_sys->p_page->i_version == i_version )
717 bs_skip( s, 8 * (i_segment_length - 2) );
720 else if( p_sys->p_page )
722 if( p_sys->p_page->i_region_defs )
723 free( p_sys->p_page->p_region_defs );
724 p_sys->p_page->i_region_defs = 0;
730 msg_Dbg( p_dec, "new page" );
732 /* Allocate a new page */
733 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
736 p_sys->p_page->i_version = i_version;
737 p_sys->p_page->i_timeout = i_timeout;
738 p_sys->b_page = VLC_TRUE;
740 /* Number of regions */
741 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
743 if( p_sys->p_page->i_region_defs == 0 ) return;
745 p_sys->p_page->p_region_defs =
746 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
747 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
749 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
750 bs_skip( s, 8 ); /* Reserved */
751 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
752 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
755 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
756 i, p_sys->p_page->p_region_defs[i].i_x,
757 p_sys->p_page->p_region_defs[i].i_y );
762 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
764 decoder_sys_t *p_sys = p_dec->p_sys;
765 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
766 int i_segment_length, i_processed_length, i_id, i_version;
767 int i_width, i_height, i_level_comp, i_depth, i_clut;
768 int i_8_bg, i_4_bg, i_2_bg;
771 i_segment_length = bs_read( s, 16 );
772 i_id = bs_read( s, 8 );
773 i_version = bs_read( s, 4 );
775 /* Check if we already have this region */
776 for( p_region = p_sys->p_regions; p_region != NULL;
777 p_region = p_region->p_next )
779 pp_region = &p_region->p_next;
780 if( p_region->i_id == i_id ) break;
783 /* Check version number */
784 if( p_region && p_region->i_version == i_version )
786 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
793 msg_Dbg( p_dec, "new region: %i", i_id );
795 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
796 memset( p_region, 0, sizeof(dvbsub_region_t) );
797 p_region->p_object_defs = NULL;
798 p_region->p_pixbuf = NULL;
799 p_region->p_next = NULL;
802 /* Region attributes */
803 p_region->i_id = i_id;
804 p_region->i_version = i_version;
805 b_fill = bs_read( s, 1 );
806 bs_skip( s, 3 ); /* Reserved */
808 i_width = bs_read( s, 16 );
809 i_height = bs_read( s, 16 );
811 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
813 i_level_comp = bs_read( s, 3 );
814 i_depth = bs_read( s, 3 );
815 bs_skip( s, 2 ); /* Reserved */
816 i_clut = bs_read( s, 8 );
818 i_8_bg = bs_read( s, 8 );
819 i_4_bg = bs_read( s, 4 );
820 i_2_bg = bs_read( s, 2 );
821 bs_skip( s, 2 ); /* Reserved */
823 /* Free old object defs */
824 while( p_region->i_object_defs )
826 int i = p_region->i_object_defs - 1;
827 if( p_region->p_object_defs[i].psz_text )
828 free( p_region->p_object_defs[i].psz_text );
829 if( !i ) free( p_region->p_object_defs );
831 p_region->i_object_defs--;
833 p_region->p_object_defs = NULL;
835 /* Extra sanity checks */
836 if( p_region->i_width != i_width || p_region->i_height != i_height )
838 if( p_region->p_pixbuf )
840 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
841 p_region->i_width, p_region->i_height, i_width, i_height );
842 free( p_region->p_pixbuf );
845 p_region->p_pixbuf = malloc( i_height * i_width );
846 p_region->i_depth = 0;
849 if( p_region->i_depth && (p_region->i_depth != i_depth ||
850 p_region->i_level_comp != i_level_comp || p_region->i_clut != i_clut) )
852 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
855 /* Erase background of region */
858 int i_background = (p_region->i_depth == 1) ? i_2_bg :
859 (p_region->i_depth == 2) ? i_4_bg : i_8_bg;
860 memset( p_region->p_pixbuf, i_background, i_width * i_height );
863 p_region->i_width = i_width;
864 p_region->i_height = i_height;
865 p_region->i_level_comp = i_level_comp;
866 p_region->i_depth = i_depth;
867 p_region->i_clut = i_clut;
869 /* List of objects in the region */
870 i_processed_length = 10;
871 while( i_processed_length < i_segment_length )
873 dvbsub_objectdef_t *p_obj;
875 /* We create a new object */
876 p_region->i_object_defs++;
877 p_region->p_object_defs =
878 realloc( p_region->p_object_defs,
879 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
881 /* We parse object properties */
882 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
883 p_obj->i_id = bs_read( s, 16 );
884 p_obj->i_type = bs_read( s, 2 );
885 bs_skip( s, 2 ); /* Provider */
886 p_obj->i_x = bs_read( s, 12 );
887 bs_skip( s, 4 ); /* Reserved */
888 p_obj->i_y = bs_read( s, 12 );
891 i_processed_length += 6;
893 if( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ||
894 p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING )
896 p_obj->i_fg_pc = bs_read( s, 8 );
897 p_obj->i_bg_pc = bs_read( s, 8 );
898 i_processed_length += 2;
903 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
905 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
906 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
907 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
909 static void decode_object( decoder_t *p_dec, bs_t *s )
911 decoder_sys_t *p_sys = p_dec->p_sys;
912 dvbsub_region_t *p_region;
913 int i_segment_length, i_coding_method, i_version, i_id, i;
914 vlc_bool_t b_non_modify_color;
916 /* ETSI 300-743 paragraph 7.2.4
917 * sync_byte, segment_type and page_id have already been processed.
919 i_segment_length = bs_read( s, 16 );
920 i_id = bs_read( s, 16 );
921 i_version = bs_read( s, 4 );
922 i_coding_method = bs_read( s, 2 );
924 if( i_coding_method > 1 )
926 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
927 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
931 /* Check if the object needs to be rendered in at least one
933 for( p_region = p_sys->p_regions; p_region != NULL;
934 p_region = p_region->p_next )
936 for( i = 0; i < p_region->i_object_defs; i++ )
937 if( p_region->p_object_defs[i].i_id == i_id ) break;
939 if( i != p_region->i_object_defs ) break;
943 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
948 msg_Dbg( p_dec, "new object: %i", i_id );
951 b_non_modify_color = bs_read( s, 1 );
952 bs_skip( s, 1 ); /* Reserved */
954 if( i_coding_method == 0x00 )
956 int i_topfield, i_bottomfield;
957 uint8_t *p_topfield, *p_bottomfield;
959 i_topfield = bs_read( s, 16 );
960 i_bottomfield = bs_read( s, 16 );
961 p_topfield = s->p_start + bs_pos( s ) / 8;
962 p_bottomfield = p_topfield + i_topfield;
964 bs_skip( s, 8 * (i_segment_length - 7) );
967 if( i_segment_length < i_topfield + i_bottomfield + 7 ||
968 p_topfield + i_topfield + i_bottomfield > s->p_end )
970 msg_Dbg( p_dec, "corrupted object data" );
974 for( p_region = p_sys->p_regions; p_region != NULL;
975 p_region = p_region->p_next )
977 for( i = 0; i < p_region->i_object_defs; i++ )
979 if( p_region->p_object_defs[i].i_id != i_id ) continue;
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,
984 p_topfield, i_topfield );
988 dvbsub_render_pdata( p_dec, p_region,
989 p_region->p_object_defs[i].i_x,
990 p_region->p_object_defs[i].i_y + 1,
991 p_bottomfield, i_bottomfield );
995 /* Duplicate the top field */
996 dvbsub_render_pdata( p_dec, p_region,
997 p_region->p_object_defs[i].i_x,
998 p_region->p_object_defs[i].i_y + 1,
999 p_topfield, i_topfield );
1006 /* DVB subtitling as characters */
1007 int i_number_of_codes = bs_read( s, 8 );
1008 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1011 if( i_segment_length < i_number_of_codes*2 + 4 ||
1012 p_start + i_number_of_codes*2 > s->p_end )
1014 msg_Dbg( p_dec, "corrupted object data" );
1018 for( p_region = p_sys->p_regions; p_region != NULL;
1019 p_region = p_region->p_next )
1021 for( i = 0; i < p_region->i_object_defs; i++ )
1025 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1027 p_region->p_object_defs[i].psz_text =
1028 realloc( p_region->p_object_defs[i].psz_text,
1029 i_number_of_codes + 1 );
1031 for( j = 0; j < i_number_of_codes; j++ )
1033 p_region->p_object_defs[i].psz_text[j] = bs_read( s, 16 );
1035 p_region->p_object_defs[i].psz_text[j] = 0;
1041 msg_Dbg( p_dec, "end object: %i", i_id );
1045 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1047 uint8_t *p_field, int i_field )
1054 if( !p_region->p_pixbuf )
1056 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1059 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1060 i_x >= p_region->i_width )
1062 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1066 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1067 bs_init( &bs, p_field, i_field );
1069 while( !bs_eof( &bs ) )
1072 if( i_y >= p_region->i_height ) return;
1074 switch( bs_read( &bs, 8 ) )
1077 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1082 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1087 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1094 /* We don't use map tables */
1097 case 0xf0: /* End of line code */
1098 p_pixbuf += 2*p_region->i_width;
1099 i_offset = 0; i_y += 2;
1105 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1107 vlc_bool_t b_stop = 0;
1109 while( !b_stop && !bs_eof( s ) )
1111 int i_count = 0, i_color = 0;
1113 if( (i_color = bs_read( s, 2 )) != 0x00 )
1119 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1121 i_count = 3 + bs_read( s, 3 );
1122 i_color = bs_read( s, 2 );
1126 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1128 switch( bs_read( s, 2 ) ) //Switch3
1137 i_count = 12 + bs_read( s, 4 );
1138 i_color = bs_read( s, 2 );
1141 i_count = 29 + bs_read( s, 8 );
1142 i_color = bs_read( s, 2 );
1150 /* 1 pixel color 0 */
1156 if( !i_count ) continue;
1159 if( i_count + *pi_off > i_width ) break;
1161 if( i_count == 1 ) p[*pi_off] = i_color;
1162 else memset( p + *pi_off, i_color, i_count );
1164 (*pi_off) += i_count;
1170 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1172 vlc_bool_t b_stop = 0;
1174 while( !b_stop && !bs_eof( s ) )
1176 int i_count = 0, i_color = 0;
1178 if( (i_color = bs_read( s, 4 )) != 0x00 )
1185 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1187 if( bs_show( s, 3 ) != 0x00 )
1189 i_count = 2 + bs_read( s, 3 );
1199 if( bs_read( s, 1 ) == 0x00) //Switch2
1201 i_count = 4 + bs_read( s, 2 );
1202 i_color = bs_read( s, 4 );
1206 switch ( bs_read( s, 2 ) ) //Switch3
1215 i_count = 9 + bs_read( s, 4 );
1216 i_color = bs_read( s, 4 );
1219 i_count= 25 + bs_read( s, 8 );
1220 i_color = bs_read( s, 4 );
1227 if( !i_count ) continue;
1230 if( i_count + *pi_off > i_width ) break;
1232 if( i_count == 1 ) p[*pi_off] = i_color;
1233 else memset( p + *pi_off, i_color, i_count );
1235 (*pi_off) += i_count;
1241 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1243 vlc_bool_t b_stop = 0;
1245 while( !b_stop && !bs_eof( s ) )
1247 int i_count = 0, i_color = 0;
1249 if( (i_color = bs_read( s, 8 )) != 0x00 )
1256 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1258 if( bs_show( s, 7 ) != 0x00 )
1260 i_count = bs_read( s, 7 );
1270 i_count = bs_read( s, 7 );
1271 i_color = bs_read( s, 8 );
1275 if( !i_count ) continue;
1278 if( i_count + *pi_off > i_width ) break;
1280 if( i_count == 1 ) p[*pi_off] = i_color;
1281 else memset( p + *pi_off, i_color, i_count );
1283 (*pi_off) += i_count;
1289 static void free_all( decoder_t *p_dec )
1291 decoder_sys_t *p_sys = p_dec->p_sys;
1292 dvbsub_region_t *p_reg, *p_reg_next;
1293 dvbsub_clut_t *p_clut, *p_clut_next;
1295 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1297 p_clut_next = p_clut->p_next;
1300 p_sys->p_cluts = NULL;
1302 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1306 p_reg_next = p_reg->p_next;
1307 for( i = 0; i < p_reg->i_object_defs; i++ )
1308 if( p_reg->p_object_defs[i].psz_text )
1309 free( p_reg->p_object_defs[i].psz_text );
1310 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1311 if( p_reg->p_pixbuf ) free( p_reg->p_pixbuf );
1314 p_sys->p_regions = NULL;
1318 if( p_sys->p_page->i_region_defs )
1319 free( p_sys->p_page->p_region_defs );
1320 free( p_sys->p_page );
1322 p_sys->p_page = NULL;
1325 static subpicture_t *render( decoder_t *p_dec )
1327 decoder_sys_t *p_sys = p_dec->p_sys;
1328 subpicture_t *p_spu;
1329 subpicture_region_t **pp_spu_region;
1330 int i, j, i_timeout = 0;
1332 /* Allocate the subpicture internal data. */
1333 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1334 if( !p_spu ) return NULL;
1336 pp_spu_region = &p_spu->p_region;
1338 /* Loop on region definitions */
1341 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1344 for( i = 0; p_sys->p_page && i < p_sys->p_page->i_region_defs; i++ )
1346 dvbsub_region_t *p_region;
1347 dvbsub_regiondef_t *p_regiondef;
1348 dvbsub_clut_t *p_clut;
1349 dvbsub_color_t *p_color;
1350 subpicture_region_t *p_spu_region;
1351 uint8_t *p_src, *p_dst;
1355 i_timeout = p_sys->p_page->i_timeout;
1357 p_regiondef = &p_sys->p_page->p_region_defs[i];
1360 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1361 p_regiondef->i_x, p_regiondef->i_y );
1364 /* Find associated region */
1365 for( p_region = p_sys->p_regions; p_region != NULL;
1366 p_region = p_region->p_next )
1368 if( p_regiondef->i_id == p_region->i_id ) break;
1373 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1377 /* Find associated CLUT */
1378 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1380 if( p_region->i_clut == p_clut->i_id ) break;
1384 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1388 /* Create new SPU region */
1389 memset( &fmt, 0, sizeof(video_format_t) );
1390 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1391 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1392 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1393 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1394 fmt.i_x_offset = fmt.i_y_offset = 0;
1395 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1398 msg_Err( p_dec, "cannot allocate SPU region" );
1401 p_spu_region->i_x = p_regiondef->i_x;
1402 p_spu_region->i_y = p_regiondef->i_y;
1403 *pp_spu_region = p_spu_region;
1404 pp_spu_region = &p_spu_region->p_next;
1407 fmt.p_palette->i_entries = p_region->i_depth == 1 ? 4 :
1408 p_region->i_depth == 2 ? 16 : 256;
1409 p_color = (p_region->i_depth == 1) ? p_clut->c_2b :
1410 (p_region->i_depth == 2) ? p_clut->c_4b : p_clut->c_8b;
1411 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1413 fmt.p_palette->palette[j][0] = p_color[j].Y;
1414 fmt.p_palette->palette[j][1] = p_color[j].Cr;
1415 fmt.p_palette->palette[j][2] = p_color[j].Cb;
1416 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1419 p_src = p_region->p_pixbuf;
1420 p_dst = p_spu_region->picture.Y_PIXELS;
1421 i_pitch = p_spu_region->picture.Y_PITCH;
1423 /* Copy pixel buffer */
1424 for( j = 0; j < p_region->i_height; j++ )
1426 memcpy( p_dst, p_src, p_region->i_width );
1427 p_src += p_region->i_width;
1431 /* Check subtitles encoded as strings of characters
1432 * (since there are not rendered in the pixbuffer) */
1433 for( j = 0; j < p_region->i_object_defs; j++ )
1435 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1437 if( p_object_def->i_type != 1 || !p_object_def->psz_text )
1440 /* Create new SPU region */
1441 memset( &fmt, 0, sizeof(video_format_t) );
1442 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
1443 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1444 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1445 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1446 fmt.i_x_offset = fmt.i_y_offset = 0;
1447 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1450 msg_Err( p_dec, "cannot allocate SPU region" );
1454 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1455 p_spu_region->i_x = p_regiondef->i_x + p_object_def->i_x;
1456 p_spu_region->i_y = p_regiondef->i_y + p_object_def->i_y;
1457 *pp_spu_region = p_spu_region;
1458 pp_spu_region = &p_spu_region->p_next;
1462 /* Set the pf_render callback */
1463 p_spu->i_start = p_sys->i_pts;
1464 p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1465 p_spu->b_ephemer = VLC_TRUE;
1466 p_spu->b_fade = VLC_TRUE;
1468 /* Correct positioning of SPU */
1469 p_spu->b_absolute = p_sys->b_absolute;
1470 p_spu->i_flags = p_sys->i_spu_position;
1471 p_spu->i_x = p_sys->i_spu_x;
1472 p_spu->i_y = p_sys->i_spu_y;
1477 /*****************************************************************************
1478 * encoder_sys_t : encoder descriptor
1479 *****************************************************************************/
1480 typedef struct encoder_region_t
1487 struct encoder_sys_t
1489 unsigned int i_page_ver;
1490 unsigned int i_region_ver;
1491 unsigned int i_clut_ver;
1494 encoder_region_t *p_regions;
1498 /* subpicture positioning */
1501 int i_timeout_delay;
1504 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1505 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1506 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1507 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1509 /*****************************************************************************
1510 * OpenEncoder: probe the encoder and return score
1511 *****************************************************************************/
1512 static int OpenEncoder( vlc_object_t *p_this )
1514 encoder_t *p_enc = (encoder_t *)p_this;
1515 encoder_sys_t *p_sys;
1518 if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','v','b','s') &&
1521 return VLC_EGENERIC;
1524 /* Allocate the memory needed to store the decoder's structure */
1525 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1527 msg_Err( p_enc, "out of memory" );
1530 p_enc->p_sys = p_sys;
1532 p_enc->pf_encode_sub = Encode;
1533 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1534 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1536 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1538 p_sys->i_page_ver = 0;
1539 p_sys->i_region_ver = 0;
1540 p_sys->i_clut_ver = 0;
1541 p_sys->i_regions = 0;
1542 p_sys->p_regions = 0;
1544 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1545 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1546 p_sys->i_offset_x = val.i_int;
1547 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1548 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1549 p_sys->i_offset_y = val.i_int;
1550 var_Create( p_this, ENC_CFG_PREFIX "timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1551 var_Get( p_this, ENC_CFG_PREFIX "timeout", &val );
1552 p_sys->i_timeout_delay = val.i_int;
1557 /* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
1558 * into VLC_FOURCC('Y','U','V','P')
1560 static subpicture_t *YuvaYuvp( encoder_t *p_enc, subpicture_t *p_subpic )
1562 subpicture_region_t *p_region = NULL;
1564 if( !p_subpic ) return NULL;
1566 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1568 video_format_t *p_fmt = &p_region->fmt;
1569 int i = 0, j = 0, n = 0, p = 0;
1570 int i_max_entries = 256;
1572 #ifdef RANDOM_DITHERING
1573 int i_seed = 0xdeadbeef; /* random seed */
1577 int i_pixels = p_region->picture.p[0].i_visible_lines
1578 * p_region->picture.p[0].i_pitch;
1579 int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
1580 * p_region->picture.p[0].i_pitch
1581 + p_region->picture.p[0].i_pitch * 1 / 3;
1582 int i_tolerance = 0;
1585 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1587 p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
1588 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1589 if( !p_fmt->p_palette ) break;
1590 p_fmt->p_palette->i_entries = 0;
1592 /* Find best iterator using Euclide’s algorithm */
1593 for( ; i_iterator > 1 ; i_iterator-- )
1612 /* Count colors, build best palette */
1613 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1615 vlc_bool_t b_success = VLC_TRUE;
1616 p_fmt->p_palette->i_entries = 0;
1618 for( i = 0; i < i_pixels ; )
1621 y = p_region->picture.p[0].p_pixels[i];
1622 u = p_region->picture.p[1].p_pixels[i];
1623 v = p_region->picture.p[2].p_pixels[i];
1624 a = p_region->picture.p[3].p_pixels[i];
1625 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1627 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1628 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1629 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1630 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1635 if( j == p_fmt->p_palette->i_entries )
1637 p_fmt->p_palette->palette[j][0] = y;
1638 p_fmt->p_palette->palette[j][1] = u;
1639 p_fmt->p_palette->palette[j][2] = v;
1640 p_fmt->p_palette->palette[j][3] = a;
1641 p_fmt->p_palette->i_entries++;
1643 if( p_fmt->p_palette->i_entries >= i_max_entries )
1645 b_success = VLC_FALSE;
1662 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1665 #ifndef RANDOM_DITHERING
1666 pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
1667 * sizeof(int) * 4 );
1668 for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
1674 /* Fill image with our new colours */
1675 for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
1677 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1679 for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
1681 int i_offset = p * p_region->picture.p[0].i_pitch + n;
1683 int i_mindist, i_best;
1685 y = (int)p_region->picture.p[0].p_pixels[i_offset];
1686 u = (int)p_region->picture.p[1].p_pixels[i_offset];
1687 v = (int)p_region->picture.p[2].p_pixels[i_offset];
1688 a = (int)p_region->picture.p[3].p_pixels[i_offset];
1690 /* Add dithering compensation */
1691 #ifdef RANDOM_DITHERING
1692 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1693 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1694 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1695 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1697 y += i_ydelta + pi_delta[ n * 4 ];
1698 u += i_udelta + pi_delta[ n * 4 + 1 ];
1699 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1700 a += i_adelta + pi_delta[ n * 4 + 3 ];
1703 /* Find best colour in palette */
1704 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1708 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1709 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1710 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1711 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1713 if( i_dist < i_mindist )
1720 /* Set pixel to best color */
1721 p_region->picture.p[0].p_pixels[i_offset] = i_best;
1723 /* Update dithering state */
1724 #ifdef RANDOM_DITHERING
1725 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1727 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1728 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1729 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1730 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1731 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1732 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1733 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1734 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1735 i_ydelta = i_ydelta * 5 / 8;
1736 i_udelta = i_udelta * 5 / 8;
1737 i_vdelta = i_vdelta * 5 / 8;
1738 i_adelta = i_adelta * 5 / 8;
1742 #ifndef RANDOM_DITHERING
1747 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1749 p_fmt->p_palette->palette[i][0] = 0;
1750 p_fmt->p_palette->palette[i][1] = 0;
1751 p_fmt->p_palette->palette[i][2] = 0;
1752 p_fmt->p_palette->palette[i][3] = 0;
1754 p_fmt->p_palette->i_entries = i_max_entries;
1756 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1762 /****************************************************************************
1763 * Encode: the whole thing
1764 ****************************************************************************/
1765 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1767 subpicture_t *p_temp = NULL;
1768 subpicture_region_t *p_region = NULL;
1769 bs_t bits, *s = &bits;
1772 if( !p_subpic || !p_subpic->p_region ) return NULL;
1774 /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
1775 * VLC_FOURCC('Y','U','V','P')
1777 p_region = p_subpic->p_region;
1778 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
1780 p_temp = YuvaYuvp( p_enc, p_subpic );
1783 msg_Err( p_enc, "no picture in subpicture" );
1786 p_region = p_subpic->p_region;
1790 if( !p_region ) return NULL;
1792 if( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') &&
1793 p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return NULL;
1795 if( p_region->fmt.p_palette )
1797 switch( p_region->fmt.p_palette->i_entries )
1805 msg_Err( p_enc, "subpicture palette (%d) not handled",
1806 p_region->fmt.p_palette->i_entries );
1813 msg_Dbg( p_enc, "encoding subpicture" );
1815 p_block = block_New( p_enc, 64000 );
1816 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1818 bs_write( s, 8, 0x20 ); /* Data identifier */
1819 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1821 encode_page_composition( p_enc, s, p_subpic );
1822 encode_region_composition( p_enc, s, p_subpic );
1823 encode_clut( p_enc, s, p_subpic );
1824 encode_object( p_enc, s, p_subpic );
1826 /* End of display */
1827 bs_write( s, 8, 0x0f ); /* Sync byte */
1828 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1829 bs_write( s, 16, 1 ); /* Page id */
1830 bs_write( s, 16, 0 ); /* Segment length */
1832 bs_write( s, 8, 0xff );/* End marker */
1833 p_block->i_buffer = bs_pos( s ) / 8;
1834 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1835 if( !p_subpic->b_ephemer && p_subpic->i_stop > p_subpic->i_start )
1837 block_t *p_block_stop;
1839 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1841 /* Send another (empty) subtitle to signal the end of display */
1842 p_block_stop = block_New( p_enc, 64000 );
1843 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1844 bs_write( s, 8, 0x20 ); /* Data identifier */
1845 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1846 encode_page_composition( p_enc, s, 0 );
1847 bs_write( s, 8, 0x0f ); /* Sync byte */
1848 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1849 bs_write( s, 16, 1 ); /* Page id */
1850 bs_write( s, 16, 0 ); /* Segment length */
1851 bs_write( s, 8, 0xff );/* End marker */
1852 p_block_stop->i_buffer = bs_pos( s ) / 8;
1853 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
1854 block_ChainAppend( &p_block, p_block_stop );
1855 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
1858 msg_Dbg( p_enc, "subpicture encoded properly" );
1863 /*****************************************************************************
1864 * CloseEncoder: encoder destruction
1865 *****************************************************************************/
1866 static void CloseEncoder( vlc_object_t *p_this )
1868 encoder_t *p_enc = (encoder_t *)p_this;
1869 encoder_sys_t *p_sys = p_enc->p_sys;
1871 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
1872 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
1873 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
1875 if( p_sys->i_regions ) free( p_sys->p_regions );
1879 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
1880 subpicture_t *p_subpic )
1882 encoder_sys_t *p_sys = p_enc->p_sys;
1883 subpicture_region_t *p_region;
1884 vlc_bool_t b_mode_change = VLC_FALSE;
1885 int i_regions, i_timeout;
1887 bs_write( s, 8, 0x0f ); /* Sync byte */
1888 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
1889 bs_write( s, 16, 1 ); /* Page id */
1891 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
1892 p_region; p_region = p_region->p_next, i_regions++ )
1894 if( i_regions >= p_sys->i_regions )
1896 encoder_region_t region;
1897 region.i_width = region.i_height = 0;
1899 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
1900 (p_sys->i_regions + 1) );
1901 p_sys->p_regions[p_sys->i_regions++] = region;
1904 if( ( p_sys->p_regions[i_regions].i_width <
1905 (int)p_region->fmt.i_visible_width ) ||
1906 ( p_sys->p_regions[i_regions].i_width >
1907 (int)p_region->fmt.i_visible_width ) )
1909 b_mode_change = VLC_TRUE;
1910 msg_Dbg( p_enc, "region %i width change: %i -> %i",
1911 i_regions, p_sys->p_regions[i_regions].i_width,
1912 p_region->fmt.i_visible_width );
1913 p_sys->p_regions[i_regions].i_width =
1914 p_region->fmt.i_visible_width;
1916 if( p_sys->p_regions[i_regions].i_height <
1917 (int)p_region->fmt.i_visible_height )
1919 b_mode_change = VLC_TRUE;
1920 msg_Dbg( p_enc, "region %i height change: %i -> %i",
1921 i_regions, p_sys->p_regions[i_regions].i_height,
1922 p_region->fmt.i_visible_height );
1923 p_sys->p_regions[i_regions].i_height =
1924 p_region->fmt.i_visible_height;
1928 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
1931 if( p_subpic && !p_subpic->b_ephemer &&
1932 p_subpic->i_stop > p_subpic->i_start )
1934 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
1937 bs_write( s, 8, i_timeout + p_sys->i_timeout_delay ); /* Timeout */
1938 bs_write( s, 4, p_sys->i_page_ver++ );
1939 bs_write( s, 2, b_mode_change ?
1940 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
1941 bs_write( s, 2, 0 ); /* Reserved */
1943 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
1944 p_region; p_region = p_region->p_next, i_regions++ )
1946 bs_write( s, 8, i_regions );
1947 bs_write( s, 8, 0 ); /* Reserved */
1948 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
1950 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
1951 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
1955 bs_write( s, 16, p_region->i_x );
1956 bs_write( s, 16, p_region->i_y );
1961 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
1963 encoder_sys_t *p_sys = p_enc->p_sys;
1964 subpicture_region_t *p_region = p_subpic->p_region;
1965 video_palette_t *p_pal, pal;
1969 if( !p_region ) return;
1971 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
1973 p_pal = p_region->fmt.p_palette;
1978 for( i = 0; i < 4; i++ )
1980 pal.palette[i][0] = 0;
1981 pal.palette[i][1] = 0;
1982 pal.palette[i][2] = 0;
1983 pal.palette[i][3] = 0;
1988 bs_write( s, 8, 0x0f ); /* Sync byte */
1989 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
1990 bs_write( s, 16, 1 ); /* Page id */
1992 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
1993 bs_write( s, 8, 1 ); /* Clut id */
1994 bs_write( s, 4, p_sys->i_clut_ver++ );
1995 bs_write( s, 4, 0 ); /* Reserved */
1997 for( i = 0; i < p_pal->i_entries; i++ )
1999 bs_write( s, 8, i ); /* Clut entry id */
2000 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2001 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2002 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2003 bs_write( s, 4, 0 ); /* Reserved */
2004 bs_write( s, 1, 1 ); /* Full range flag */
2005 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2006 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2007 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2008 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2009 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2013 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2014 subpicture_t *p_subpic )
2016 encoder_sys_t *p_sys = p_enc->p_sys;
2017 subpicture_region_t *p_region;
2020 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2021 p_region = p_region->p_next, i_region++ )
2023 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2025 p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T');
2029 video_palette_t *p_pal = p_region->fmt.p_palette;
2033 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2037 i_entries = p_pal->i_entries;
2038 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2040 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2042 if( !p_pal->palette[i_bg][3] ) break;
2046 bs_write( s, 8, 0x0f ); /* Sync byte */
2047 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2048 bs_write( s, 16, 1 ); /* Page id */
2050 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2051 bs_write( s, 8, i_region );
2052 bs_write( s, 4, p_sys->i_region_ver++ );
2054 /* Region attributes */
2055 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2056 bs_write( s, 3, 0 ); /* Reserved */
2057 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2058 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2059 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2060 bs_write( s, 3, i_depth ); /* Region depth */
2061 bs_write( s, 2, 0 ); /* Reserved */
2062 bs_write( s, 8, 1 ); /* Clut id */
2063 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2064 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2065 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2066 bs_write( s, 2, 0 ); /* Reserved */
2068 /* In our implementation we only have 1 object per region */
2069 bs_write( s, 16, i_region );
2070 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2071 bs_write( s, 2, 0 ); /* object provider flag */
2072 bs_write( s, 12, 0 );/* object horizontal position */
2073 bs_write( s, 4, 0 ); /* Reserved */
2074 bs_write( s, 12, 0 );/* object vertical position */
2078 bs_write( s, 8, 1 ); /* foreground pixel code */
2079 bs_write( s, 8, 0 ); /* background pixel code */
2084 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2085 subpicture_region_t *p_region,
2088 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2090 encoder_sys_t *p_sys = p_enc->p_sys;
2091 subpicture_region_t *p_region;
2094 int i_length_pos, i_update_pos, i_pixel_data_pos;
2096 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2097 p_region = p_region->p_next, i_region++ )
2099 bs_write( s, 8, 0x0f ); /* Sync byte */
2100 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2101 bs_write( s, 16, 1 ); /* Page id */
2103 i_length_pos = bs_pos( s );
2104 bs_write( s, 16, 0 ); /* Segment length */
2105 bs_write( s, 16, i_region ); /* Object id */
2106 bs_write( s, 4, p_sys->i_region_ver++ );
2108 /* object coding method */
2109 switch( p_region->fmt.i_chroma )
2111 case VLC_FOURCC( 'Y','U','V','P' ):
2112 bs_write( s, 2, 0 );
2114 case VLC_FOURCC( 'T','E','X','T' ):
2115 bs_write( s, 2, 1 );
2118 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2122 bs_write( s, 1, 0 ); /* non modifying color flag */
2123 bs_write( s, 1, 0 ); /* Reserved */
2125 if( p_region->fmt.i_chroma == VLC_FOURCC( 'T','E','X','T' ) )
2129 if( !p_region->psz_text ) continue;
2131 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2133 bs_write( s, 8, i_size ); /* number of characters in string */
2134 for( i = 0; i < i_size; i++ )
2136 bs_write( s, 16, p_region->psz_text[i] );
2139 /* Update segment length */
2140 SetWBE( &s->p_start[i_length_pos/8],
2141 (bs_pos(s) - i_length_pos)/8 -2 );
2145 /* Coding of a bitmap object */
2146 i_update_pos = bs_pos( s );
2147 bs_write( s, 16, 0 ); /* topfield data block length */
2148 bs_write( s, 16, 0 ); /* bottomfield data block length */
2151 i_pixel_data_pos = bs_pos( s );
2152 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
2153 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2154 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2157 i_pixel_data_pos = bs_pos( s );
2158 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
2159 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2160 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2162 /* Stuffing for word alignment */
2164 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2166 /* Update segment length */
2167 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2171 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2172 subpicture_region_t *p_region,
2174 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2175 subpicture_region_t *p_region,
2177 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2178 subpicture_region_t *p_region,
2180 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2181 subpicture_region_t *p_region,
2184 unsigned int i_line;
2187 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
2189 /* Encode line by line */
2190 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2193 switch( p_region->fmt.p_palette->i_entries )
2199 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2200 encode_pixel_line_2bp( p_enc, s, p_region, i_line );
2204 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2205 encode_pixel_line_4bp( p_enc, s, p_region, i_line );
2209 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2210 encode_pixel_line_8bp( p_enc, s, p_region, i_line );
2214 msg_Err( p_enc, "subpicture palette (%i) not handled",
2215 p_region->fmt.p_palette->i_entries );
2219 bs_write( s, 8, 0xf0 ); /* End of object line code */
2223 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2224 subpicture_region_t *p_region,
2227 unsigned int i, i_length = 0;
2228 int i_pitch = p_region->picture.p->i_pitch;
2229 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2230 int i_last_pixel = p_data[0];
2232 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2234 if( i != p_region->fmt.i_visible_width &&
2235 p_data[i] == i_last_pixel && i_length != 284 )
2241 if( i_length == 1 || i_length == 11 || i_length == 28 )
2243 /* 2bit/pixel code */
2244 if( i_last_pixel ) bs_write( s, 2, i_last_pixel );
2247 bs_write( s, 2, 0 );
2248 bs_write( s, 1, 0 );
2249 bs_write( s, 1, 1 ); /* pseudo color 0 */
2258 bs_write( s, 2, i_last_pixel );
2259 bs_write( s, 2, i_last_pixel );
2263 bs_write( s, 2, 0 );
2264 bs_write( s, 1, 0 );
2265 bs_write( s, 1, 0 );
2266 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2269 else if( i_length > 2 )
2271 bs_write( s, 2, 0 );
2272 if( i_length <= 10 )
2274 bs_write( s, 1, 1 );
2275 bs_write( s, 3, i_length - 3 );
2276 bs_write( s, 2, i_last_pixel );
2280 bs_write( s, 1, 0 );
2281 bs_write( s, 1, 0 );
2283 if( i_length <= 27 )
2285 bs_write( s, 2, 2 );
2286 bs_write( s, 4, i_length - 12 );
2287 bs_write( s, 2, i_last_pixel );
2291 bs_write( s, 2, 3 );
2292 bs_write( s, 8, i_length - 29 );
2293 bs_write( s, 2, i_last_pixel );
2298 if( i == p_region->fmt.i_visible_width ) break;
2300 i_last_pixel = p_data[i];
2305 bs_write( s, 2, 0 );
2306 bs_write( s, 1, 0 );
2307 bs_write( s, 1, 0 );
2308 bs_write( s, 2, 0 );
2314 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2315 subpicture_region_t *p_region,
2318 unsigned int i, i_length = 0;
2319 int i_pitch = p_region->picture.p->i_pitch;
2320 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2321 int i_last_pixel = p_data[0];
2323 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2325 if( i != p_region->fmt.i_visible_width &&
2326 p_data[i] == i_last_pixel && i_length != 280 )
2332 if( i_length == 1 || (i_length == 3 && i_last_pixel) || i_length == 8 )
2334 /* 4bit/pixel code */
2335 if( i_last_pixel ) bs_write( s, 4, i_last_pixel );
2338 bs_write( s, 4, 0 );
2339 bs_write( s, 1, 1 );
2340 bs_write( s, 1, 1 );
2341 bs_write( s, 2, 0 ); /* pseudo color 0 */
2350 bs_write( s, 4, i_last_pixel );
2351 bs_write( s, 4, i_last_pixel );
2355 bs_write( s, 4, 0 );
2356 bs_write( s, 1, 1 );
2357 bs_write( s, 1, 1 );
2358 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2361 else if( !i_last_pixel && i_length >= 3 && i_length <= 9 )
2363 bs_write( s, 4, 0 );
2364 bs_write( s, 1, 0 );
2365 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2367 else if( i_length > 2 )
2369 bs_write( s, 4, 0 );
2370 bs_write( s, 1, 1 );
2374 bs_write( s, 1, 0 );
2375 bs_write( s, 2, i_length - 4 );
2376 bs_write( s, 4, i_last_pixel );
2380 bs_write( s, 1, 1 );
2382 if( i_length <= 24 )
2384 bs_write( s, 2, 2 );
2385 bs_write( s, 4, i_length - 9 );
2386 bs_write( s, 4, i_last_pixel );
2390 bs_write( s, 2, 3 );
2391 bs_write( s, 8, i_length - 25 );
2392 bs_write( s, 4, i_last_pixel );
2397 if( i == p_region->fmt.i_visible_width ) break;
2399 i_last_pixel = p_data[i];
2404 bs_write( s, 8, 0 );
2410 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2411 subpicture_region_t *p_region,
2414 unsigned int i, i_length = 0;
2415 int i_pitch = p_region->picture.p->i_pitch;
2416 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2417 int i_last_pixel = p_data[0];
2419 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2421 if( i != p_region->fmt.i_visible_width &&
2422 p_data[i] == i_last_pixel && i_length != 127 )
2428 if( i_length == 1 && i_last_pixel )
2430 /* 8bit/pixel code */
2431 bs_write( s, 8, i_last_pixel );
2433 else if( i_length == 2 && i_last_pixel )
2435 /* 8bit/pixel code */
2436 bs_write( s, 8, i_last_pixel );
2437 bs_write( s, 8, i_last_pixel );
2439 else if( i_length <= 127 )
2441 bs_write( s, 8, 0 );
2445 bs_write( s, 1, 0 );
2446 bs_write( s, 7, i_length ); /* pseudo color 0 */
2450 bs_write( s, 1, 1 );
2451 bs_write( s, 7, i_length );
2452 bs_write( s, 8, i_last_pixel );
2456 if( i == p_region->fmt.i_visible_width ) break;
2458 i_last_pixel = p_data[i];
2463 bs_write( s, 8, 0 );
2464 bs_write( s, 8, 0 );