1 /*****************************************************************************
2 * dvbsub.c : DVB subtitles decoder
3 * DVB subtitles encoder (developed for Anevia, www.anevia.com)
4 *****************************************************************************
5 * Copyright (C) 2003 ANEVIA
6 * Copyright (C) 2003-2005 the VideoLAN team
9 * Authors: Gildas Bazin <gbazin@videolan.org>
10 * Damien LUCAS <damien.lucas@anevia.com>
11 * Laurent Aimar <fenrir@via.ecp.fr>
12 * Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
13 * Derk-Jan Hartman <hartman #at# videolan dot org>
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
28 *****************************************************************************/
29 /*****************************************************************************
33 * DVB subtitles coded as strings of characters are not handled correctly.
34 * The character codes in the string should actually be indexes referring to a
35 * character table identified in the subtitle descriptor.
37 * The spec is quite vague in this area, but what is meant is perhaps that it
38 * refers to the character index in the codepage belonging to the language specified
39 * in the subtitle descriptor. Potentially it's designed for widechar
40 * (but not for UTF-*) codepages.
41 *****************************************************************************/
46 #include <vlc_common.h>
47 #include <vlc_plugin.h>
49 #include <vlc_codec.h>
54 /* #define DEBUG_DVBSUB 1 */
56 #define POSX_TEXT N_("Decoding X coordinate")
57 #define POSX_LONGTEXT N_("X coordinate of the rendered subtitle")
59 #define POSY_TEXT N_("Decoding Y coordinate")
60 #define POSY_LONGTEXT N_("Y coordinate of the rendered subtitle")
62 #define POS_TEXT N_("Subpicture position")
63 #define POS_LONGTEXT N_( \
64 "You can enforce the subpicture position on the video " \
65 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
66 "also use combinations of these values, e.g. 6=top-right).")
68 #define ENC_POSX_TEXT N_("Encoding X coordinate")
69 #define ENC_POSX_LONGTEXT N_("X coordinate of the encoded subtitle" )
70 #define ENC_POSY_TEXT N_("Encoding Y coordinate")
71 #define ENC_POSY_LONGTEXT N_("Y coordinate of the encoded subtitle" )
73 static const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
74 static const char *const ppsz_pos_descriptions[] =
75 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
76 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
78 /*****************************************************************************
80 *****************************************************************************/
81 static int Open ( vlc_object_t * );
82 static void Close( vlc_object_t * );
83 static subpicture_t *Decode( decoder_t *, block_t ** );
85 static int OpenEncoder ( vlc_object_t * );
86 static void CloseEncoder( vlc_object_t * );
87 static block_t *Encode ( encoder_t *, subpicture_t * );
90 # define DVBSUB_CFG_PREFIX "dvbsub-"
91 set_description( N_("DVB subtitles decoder") )
92 set_shortname( N_("DVB subtitles") )
93 set_capability( "decoder", 50 )
94 set_category( CAT_INPUT )
95 set_subcategory( SUBCAT_INPUT_SCODEC )
96 set_callbacks( Open, Close )
98 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, true )
99 change_integer_list( pi_pos_values, ppsz_pos_descriptions, NULL )
100 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, false )
101 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, false )
103 # define ENC_CFG_PREFIX "sout-dvbsub-"
105 set_description( N_("DVB subtitles encoder") )
106 set_capability( "encoder", 100 )
107 set_callbacks( OpenEncoder, CloseEncoder )
109 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, false )
110 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, false )
111 add_obsolete_integer( ENC_CFG_PREFIX "timeout" ) /* Suppressed since 0.8.5 */
114 static const char *const ppsz_enc_options[] = { "x", "y", NULL };
116 /****************************************************************************
118 ****************************************************************************
119 * Those structures refer closely to the ETSI 300 743 Object model
120 ****************************************************************************/
122 /* The object definition gives the position of the object in a region [7.2.5] */
123 typedef struct dvbsub_objectdef_s
131 char *psz_text; /* for string of characters objects */
133 } dvbsub_objectdef_t;
135 /* The entry in the palette CLUT */
145 /* The displays dimensions [7.2.1] */
146 typedef struct dvbsub_display_s
163 typedef struct dvbsub_clut_s
167 dvbsub_color_t c_2b[4];
168 dvbsub_color_t c_4b[16];
169 dvbsub_color_t c_8b[256];
171 struct dvbsub_clut_s *p_next;
175 /* The Region is an aera on the image [7.2.3]
176 * with a list of the object definitions associated and a CLUT */
177 typedef struct dvbsub_region_s
192 dvbsub_objectdef_t *p_object_defs;
194 struct dvbsub_region_s *p_next;
198 /* The object definition gives the position of the object in a region */
199 typedef struct dvbsub_regiondef_s
205 } dvbsub_regiondef_t;
207 /* The page defines the list of regions [7.2.2] */
211 int i_timeout; /* in seconds */
216 dvbsub_regiondef_t *p_region_defs;
224 /* Decoder internal data */
235 dvbsub_page_t *p_page;
236 dvbsub_region_t *p_regions;
237 dvbsub_clut_t *p_cluts;
238 dvbsub_display_t *p_display;
239 dvbsub_clut_t default_clut;
243 /* List of different SEGMENT TYPES */
244 /* According to EN 300-743, table 2 */
245 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
246 #define DVBSUB_ST_REGION_COMPOSITION 0x11
247 #define DVBSUB_ST_CLUT_DEFINITION 0x12
248 #define DVBSUB_ST_OBJECT_DATA 0x13
249 #define DVBSUB_ST_DISPLAY_DEFINITION 0x14
250 #define DVBSUB_ST_ENDOFDISPLAY 0x80
251 #define DVBSUB_ST_STUFFING 0xff
252 /* List of different OBJECT TYPES */
253 /* According to EN 300-743, table 6 */
254 #define DVBSUB_OT_BASIC_BITMAP 0x00
255 #define DVBSUB_OT_BASIC_CHAR 0x01
256 #define DVBSUB_OT_COMPOSITE_STRING 0x02
257 /* Pixel DATA TYPES */
258 /* According to EN 300-743, table 9 */
259 #define DVBSUB_DT_2BP_CODE_STRING 0x10
260 #define DVBSUB_DT_4BP_CODE_STRING 0x11
261 #define DVBSUB_DT_8BP_CODE_STRING 0x12
262 #define DVBSUB_DT_24_TABLE_DATA 0x20
263 #define DVBSUB_DT_28_TABLE_DATA 0x21
264 #define DVBSUB_DT_48_TABLE_DATA 0x22
265 #define DVBSUB_DT_END_LINE 0xf0
266 /* List of different Page Composition Segment state */
267 /* According to EN 300-743, 7.2.1 table 3 */
268 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
269 #define DVBSUB_PCS_STATE_CHANGE 0x02
271 /*****************************************************************************
273 *****************************************************************************/
274 static void decode_segment( decoder_t *, bs_t * );
275 static void decode_page_composition( decoder_t *, bs_t * );
276 static void decode_region_composition( decoder_t *, bs_t * );
277 static void decode_object( decoder_t *, bs_t * );
278 static void decode_display_definition( decoder_t *, bs_t * );
279 static void decode_clut( decoder_t *, bs_t * );
280 static void free_all( decoder_t * );
282 static void default_clut_init( decoder_t * );
284 static subpicture_t *render( decoder_t * );
286 /*****************************************************************************
287 * Open: probe the decoder and return score
288 *****************************************************************************
289 * Tries to launch a decoder and return score so that the interface is able
291 *****************************************************************************/
292 static int Open( vlc_object_t *p_this )
294 decoder_t *p_dec = (decoder_t *) p_this;
295 decoder_sys_t *p_sys;
299 if( p_dec->fmt_in.i_codec != VLC_CODEC_DVBS )
304 p_dec->pf_decode_sub = Decode;
305 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
308 memset( p_sys, 0, sizeof(decoder_sys_t) );
310 p_sys->i_pts = (mtime_t) 0;
311 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
312 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
314 p_sys->p_regions = NULL;
315 p_sys->p_cluts = NULL;
316 p_sys->p_page = NULL;
317 p_sys->p_display = NULL;
319 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
320 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
321 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
322 p_sys->i_spu_position = val.i_int;
323 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
324 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
325 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
327 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
328 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
329 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
332 /* Check if subpicture position was overridden */
333 p_sys->b_absolute = true;
334 p_sys->i_spu_x = p_sys->i_spu_y = 0;
336 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
338 p_sys->b_absolute = true;
339 p_sys->i_spu_x = i_posx;
340 p_sys->i_spu_y = i_posy;
343 p_dec->fmt_out.i_cat = SPU_ES;
344 p_dec->fmt_out.i_codec = 0;
346 default_clut_init( p_dec );
351 /*****************************************************************************
353 *****************************************************************************/
354 static void Close( vlc_object_t *p_this )
356 decoder_t *p_dec = (decoder_t*) p_this;
357 decoder_sys_t *p_sys = p_dec->p_sys;
359 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
360 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
361 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
367 /*****************************************************************************
369 *****************************************************************************/
370 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
372 decoder_sys_t *p_sys = p_dec->p_sys;
374 subpicture_t *p_spu = NULL;
376 if( ( pp_block == NULL ) || ( *pp_block == NULL ) ) return NULL;
380 p_sys->i_pts = p_block->i_pts;
381 if( p_sys->i_pts <= 0 )
384 /* Some DVB channels send stuffing segments in non-dated packets so
385 * don't complain too loudly. */
386 msg_Warn( p_dec, "non dated subtitle" );
388 block_Release( p_block );
392 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
394 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
396 msg_Dbg( p_dec, "invalid data identifier" );
397 block_Release( p_block );
401 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
403 msg_Dbg( p_dec, "invalid subtitle stream id" );
404 block_Release( p_block );
409 msg_Dbg( p_dec, "subtitle packet received: %"PRId64, p_sys->i_pts );
412 p_sys->b_page = false;
413 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
415 decode_segment( p_dec, &p_sys->bs );
418 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
420 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
421 block_Release( p_block );
425 /* Check if the page is to be displayed */
426 if( p_sys->p_page && p_sys->b_page )
427 p_spu = render( p_dec );
429 block_Release( p_block );
434 /* following functions are local */
436 /*****************************************************************************
437 * default_clut_init: default clut as defined in EN 300-743 section 10
438 *****************************************************************************/
439 static void default_clut_init( decoder_t *p_dec )
441 decoder_sys_t *p_sys = p_dec->p_sys;
444 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
445 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
446 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
449 for( i = 0; i < 4; i++ )
451 uint8_t R = 0, G = 0, B = 0, T = 0;
453 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
454 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
455 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
456 else R = G = B = 0x7F;
458 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
459 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
460 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
461 p_sys->default_clut.c_2b[i].T = T;
464 /* 16 entries CLUT */
465 for( i = 0; i < 16; i++ )
467 uint8_t R = 0, G = 0, B = 0, T = 0;
471 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
477 R = (i & 0x1) ? 0xFF : 0;
478 G = (i & 0x2) ? 0xFF : 0;
479 B = (i & 0x4) ? 0xFF : 0;
484 R = (i & 0x1) ? 0x7F : 0;
485 G = (i & 0x2) ? 0x7F : 0;
486 B = (i & 0x4) ? 0x7F : 0;
489 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
490 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
491 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
492 p_sys->default_clut.c_4b[i].T = T;
495 /* 256 entries CLUT */
496 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
499 static void decode_segment( decoder_t *p_dec, bs_t *s )
501 decoder_sys_t *p_sys = p_dec->p_sys;
506 /* sync_byte (already checked) */
510 i_type = bs_read( s, 8 );
513 i_page_id = bs_read( s, 16 );
516 i_size = bs_show( s, 16 );
518 if( ( i_page_id != p_sys->i_id ) &&
519 ( i_page_id != p_sys->i_ancillary_id ) )
522 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
523 i_page_id, p_sys->i_id );
525 bs_skip( s, 8 * ( 2 + i_size ) );
529 if( ( p_sys->i_ancillary_id != p_sys->i_id ) &&
530 ( i_type == DVBSUB_ST_PAGE_COMPOSITION ) &&
531 ( i_page_id == p_sys->i_ancillary_id ) )
534 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
536 bs_skip( s, 8 * ( 2 + i_size ) );
541 if( i_page_id == p_sys->i_id )
542 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
544 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
549 case DVBSUB_ST_PAGE_COMPOSITION:
551 msg_Dbg( p_dec, "decode_page_composition" );
553 decode_page_composition( p_dec, s );
556 case DVBSUB_ST_REGION_COMPOSITION:
558 msg_Dbg( p_dec, "decode_region_composition" );
560 decode_region_composition( p_dec, s );
563 case DVBSUB_ST_CLUT_DEFINITION:
565 msg_Dbg( p_dec, "decode_clut" );
567 decode_clut( p_dec, s );
570 case DVBSUB_ST_OBJECT_DATA:
572 msg_Dbg( p_dec, "decode_object" );
574 decode_object( p_dec, s );
577 case DVBSUB_ST_DISPLAY_DEFINITION:
579 msg_Dbg( p_dec, "decode_display_definition" );
581 decode_display_definition( p_dec, s );
584 case DVBSUB_ST_ENDOFDISPLAY:
586 msg_Dbg( p_dec, "end of display" );
588 bs_skip( s, 8 * ( 2 + i_size ) );
591 case DVBSUB_ST_STUFFING:
593 msg_Dbg( p_dec, "skip stuffing" );
595 bs_skip( s, 8 * ( 2 + i_size ) );
599 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
600 bs_skip( s, 8 * ( 2 + i_size ) );
605 static void decode_clut( decoder_t *p_dec, bs_t *s )
607 decoder_sys_t *p_sys = p_dec->p_sys;
608 uint16_t i_segment_length;
609 uint16_t i_processed_length;
610 dvbsub_clut_t *p_clut, *p_next;
613 i_segment_length = bs_read( s, 16 );
614 i_id = bs_read( s, 8 );
615 i_version = bs_read( s, 4 );
617 /* Check if we already have this clut */
618 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
620 if( p_clut->i_id == i_id ) break;
623 /* Check version number */
624 if( p_clut && ( p_clut->i_version == i_version ) )
627 bs_skip( s, 8 * i_segment_length - 12 );
634 msg_Dbg( p_dec, "new clut: %i", i_id );
636 p_clut = malloc( sizeof( dvbsub_clut_t ) );
639 p_clut->p_next = p_sys->p_cluts;
640 p_sys->p_cluts = p_clut;
643 /* Initialize to default clut */
644 p_next = p_clut->p_next;
645 *p_clut = p_sys->default_clut;
646 p_clut->p_next = p_next;
648 /* We don't have this version of the CLUT: Parse it */
649 p_clut->i_version = i_version;
651 bs_skip( s, 4 ); /* Reserved bits */
652 i_processed_length = 2;
653 while( i_processed_length < i_segment_length )
655 uint8_t y, cb, cr, t;
659 i_id = bs_read( s, 8 );
660 i_type = bs_read( s, 3 );
664 if( bs_read( s, 1 ) )
667 cr = bs_read( s, 8 );
668 cb = bs_read( s, 8 );
670 i_processed_length += 6;
674 y = bs_read( s, 6 ) << 2;
675 cr = bs_read( s, 4 ) << 4;
676 cb = bs_read( s, 4 ) << 4;
677 t = bs_read( s, 2 ) << 6;
678 i_processed_length += 4;
681 /* We are not entirely compliant here as full transparency is indicated
682 * with a luma value of zero, not a transparency value of 0xff
683 * (full transparency would actually be 0xff + 1). */
690 /* According to EN 300-743 section 7.2.3 note 1, type should
691 * not have more than 1 bit set to one, but some streams don't
692 * respect this note. */
693 if( ( i_type & 0x04 ) && ( i_id < 4 ) )
695 p_clut->c_2b[i_id].Y = y;
696 p_clut->c_2b[i_id].Cr = cr;
697 p_clut->c_2b[i_id].Cb = cb;
698 p_clut->c_2b[i_id].T = t;
700 if( ( i_type & 0x02 ) && ( i_id < 16 ) )
702 p_clut->c_4b[i_id].Y = y;
703 p_clut->c_4b[i_id].Cr = cr;
704 p_clut->c_4b[i_id].Cb = cb;
705 p_clut->c_4b[i_id].T = t;
709 p_clut->c_8b[i_id].Y = y;
710 p_clut->c_8b[i_id].Cr = cr;
711 p_clut->c_8b[i_id].Cb = cb;
712 p_clut->c_8b[i_id].T = t;
717 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
719 decoder_sys_t *p_sys = p_dec->p_sys;
720 int i_version, i_state, i_segment_length, i_timeout, i;
722 /* A page is composed by 0 or more region */
723 i_segment_length = bs_read( s, 16 );
724 i_timeout = bs_read( s, 8 );
725 i_version = bs_read( s, 4 );
726 i_state = bs_read( s, 2 );
727 bs_skip( s, 2 ); /* Reserved */
729 if( i_state == DVBSUB_PCS_STATE_CHANGE )
731 /* End of an epoch, reset decoder buffer */
733 msg_Dbg( p_dec, "page composition mode change" );
737 else if( !p_sys->p_page && ( i_state != DVBSUB_PCS_STATE_ACQUISITION ) &&
738 ( i_state != DVBSUB_PCS_STATE_CHANGE ) )
740 /* Not a full PCS, we need to wait for one */
741 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
744 /* Try to start decoding even without an acquisition page */
745 bs_skip( s, 8 * (i_segment_length - 2) );
751 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
752 msg_Dbg( p_dec, "acquisition page composition" );
755 /* Check version number */
756 if( p_sys->p_page && ( p_sys->p_page->i_version == i_version ) )
758 bs_skip( s, 8 * (i_segment_length - 2) );
761 else if( p_sys->p_page )
763 if( p_sys->p_page->i_region_defs )
764 free( p_sys->p_page->p_region_defs );
765 p_sys->p_page->p_region_defs = NULL;
766 p_sys->p_page->i_region_defs = 0;
772 msg_Dbg( p_dec, "new page" );
774 /* Allocate a new page */
775 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
780 p_sys->p_page->i_version = i_version;
781 p_sys->p_page->i_timeout = i_timeout;
782 p_sys->b_page = true;
784 /* Number of regions */
785 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
787 if( p_sys->p_page->i_region_defs == 0 ) return;
789 p_sys->p_page->p_region_defs =
790 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
791 if( p_sys->p_page->p_region_defs )
793 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
795 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
796 bs_skip( s, 8 ); /* Reserved */
797 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
798 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
801 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
802 i, p_sys->p_page->p_region_defs[i].i_x,
803 p_sys->p_page->p_region_defs[i].i_y );
809 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
811 decoder_sys_t *p_sys = p_dec->p_sys;
812 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
813 int i_segment_length, i_processed_length, i_id, i_version;
814 int i_width, i_height, i_level_comp, i_depth, i_clut;
815 int i_8_bg, i_4_bg, i_2_bg;
818 i_segment_length = bs_read( s, 16 );
819 i_id = bs_read( s, 8 );
820 i_version = bs_read( s, 4 );
822 /* Check if we already have this region */
823 for( p_region = p_sys->p_regions; p_region != NULL;
824 p_region = p_region->p_next )
826 pp_region = &p_region->p_next;
827 if( p_region->i_id == i_id ) break;
830 /* Check version number */
831 if( p_region && ( p_region->i_version == i_version ) )
833 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
840 msg_Dbg( p_dec, "new region: %i", i_id );
842 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
845 memset( p_region, 0, sizeof(dvbsub_region_t) );
846 p_region->p_object_defs = NULL;
847 p_region->p_pixbuf = NULL;
848 p_region->p_next = NULL;
851 /* Region attributes */
852 p_region->i_id = i_id;
853 p_region->i_version = i_version;
854 b_fill = bs_read( s, 1 );
855 bs_skip( s, 3 ); /* Reserved */
857 i_width = bs_read( s, 16 );
858 i_height = bs_read( s, 16 );
860 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
862 i_level_comp = bs_read( s, 3 );
863 i_depth = bs_read( s, 3 );
864 bs_skip( s, 2 ); /* Reserved */
865 i_clut = bs_read( s, 8 );
867 i_8_bg = bs_read( s, 8 );
868 i_4_bg = bs_read( s, 4 );
869 i_2_bg = bs_read( s, 2 );
870 bs_skip( s, 2 ); /* Reserved */
872 /* Free old object defs */
873 while( p_region->i_object_defs )
874 free( p_region->p_object_defs[--p_region->i_object_defs].psz_text );
876 free( p_region->p_object_defs );
877 p_region->p_object_defs = NULL;
879 /* Extra sanity checks */
880 if( ( p_region->i_width != i_width ) ||
881 ( p_region->i_height != i_height ) )
883 if( p_region->p_pixbuf )
885 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
886 p_region->i_width, p_region->i_height, i_width, i_height );
887 free( p_region->p_pixbuf );
890 p_region->p_pixbuf = malloc( i_height * i_width );
891 p_region->i_depth = 0;
894 if( p_region->i_depth &&
895 ( ( p_region->i_depth != i_depth ) ||
896 ( p_region->i_level_comp != i_level_comp ) ||
897 ( p_region->i_clut != i_clut) ) )
899 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
902 /* Erase background of region */
905 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
906 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
907 memset( p_region->p_pixbuf, i_background, i_width * i_height );
910 p_region->i_width = i_width;
911 p_region->i_height = i_height;
912 p_region->i_level_comp = i_level_comp;
913 p_region->i_depth = i_depth;
914 p_region->i_clut = i_clut;
916 /* List of objects in the region */
917 i_processed_length = 10;
918 while( i_processed_length < i_segment_length )
920 dvbsub_objectdef_t *p_obj;
922 /* We create a new object */
923 p_region->i_object_defs++;
924 p_region->p_object_defs =
925 realloc( p_region->p_object_defs,
926 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
928 /* We parse object properties */
929 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
930 p_obj->i_id = bs_read( s, 16 );
931 p_obj->i_type = bs_read( s, 2 );
932 bs_skip( s, 2 ); /* Provider */
933 p_obj->i_x = bs_read( s, 12 );
934 bs_skip( s, 4 ); /* Reserved */
935 p_obj->i_y = bs_read( s, 12 );
936 p_obj->psz_text = NULL;
938 i_processed_length += 6;
940 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
941 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
943 p_obj->i_fg_pc = bs_read( s, 8 );
944 p_obj->i_bg_pc = bs_read( s, 8 );
945 i_processed_length += 2;
950 /* ETSI 300 743 [7.2.1] */
951 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
953 decoder_sys_t *p_sys = p_dec->p_sys;
954 uint16_t i_segment_length;
955 uint16_t i_processed_length = 40;
956 dvbsub_display_t *p_display;
957 dvbsub_display_t *p_old = p_sys->p_display;
960 i_segment_length = bs_read( s, 16 );
961 i_version = bs_read( s, 4 );
963 /* Check version number */
964 if( p_old && ( p_old->i_version == i_version ) )
966 /* The definition did not change */
967 bs_skip( s, 8*i_segment_length - 4 );
972 msg_Dbg( p_dec, "new display definition: %i", i_version );
974 p_display = malloc( sizeof(dvbsub_display_t) );
977 /* We don't have this version of the display definition: Parse it */
978 p_display->i_version = i_version;
979 p_display->b_windowed = bs_read( s, 1 );
980 bs_skip( s, 3 ); /* Reserved bits */
981 p_display->i_width = bs_read( s, 16 )+1;
982 p_display->i_height = bs_read( s, 16 )+1;
984 if( p_display->b_windowed )
987 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
989 /* Coordinates are measured from the top left corner */
990 p_display->i_x = bs_read( s, 16 );
991 p_display->i_max_x = bs_read( s, 16 );
992 p_display->i_y = bs_read( s, 16 );
993 p_display->i_max_y = bs_read( s, 16 );
994 i_processed_length += 64;
998 p_sys->p_display = p_display;
1001 if( i_processed_length != i_segment_length*8 )
1003 msg_Err( p_dec, "processed length %d != segment length %d",
1004 i_processed_length, i_segment_length );
1008 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1009 p_display->i_version, p_display->i_width, p_display->i_height );
1010 if( p_display->b_windowed )
1011 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1012 p_display->i_x, p_display->i_max_x, p_display->i_y, p_display->i_max_y );
1016 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1018 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1019 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1020 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1022 static void decode_object( decoder_t *p_dec, bs_t *s )
1024 decoder_sys_t *p_sys = p_dec->p_sys;
1025 dvbsub_region_t *p_region;
1026 int i_segment_length, i_coding_method, i_version, i_id, i;
1027 bool b_non_modify_color;
1029 /* ETSI 300-743 paragraph 7.2.4
1030 * sync_byte, segment_type and page_id have already been processed.
1032 i_segment_length = bs_read( s, 16 );
1033 i_id = bs_read( s, 16 );
1034 i_version = bs_read( s, 4 );
1035 i_coding_method = bs_read( s, 2 );
1037 if( i_coding_method > 1 )
1039 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1040 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1044 /* Check if the object needs to be rendered in at least one
1046 for( p_region = p_sys->p_regions; p_region != NULL;
1047 p_region = p_region->p_next )
1049 for( i = 0; i < p_region->i_object_defs; i++ )
1050 if( p_region->p_object_defs[i].i_id == i_id ) break;
1052 if( i != p_region->i_object_defs ) break;
1056 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1061 msg_Dbg( p_dec, "new object: %i", i_id );
1064 b_non_modify_color = bs_read( s, 1 );
1065 bs_skip( s, 1 ); /* Reserved */
1067 if( i_coding_method == 0x00 )
1069 int i_topfield, i_bottomfield;
1070 uint8_t *p_topfield, *p_bottomfield;
1072 i_topfield = bs_read( s, 16 );
1073 i_bottomfield = bs_read( s, 16 );
1074 p_topfield = s->p_start + bs_pos( s ) / 8;
1075 p_bottomfield = p_topfield + i_topfield;
1077 bs_skip( s, 8 * (i_segment_length - 7) );
1080 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1081 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1083 msg_Dbg( p_dec, "corrupted object data" );
1087 for( p_region = p_sys->p_regions; p_region != NULL;
1088 p_region = p_region->p_next )
1090 for( i = 0; i < p_region->i_object_defs; i++ )
1092 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1094 dvbsub_render_pdata( p_dec, p_region,
1095 p_region->p_object_defs[i].i_x,
1096 p_region->p_object_defs[i].i_y,
1097 p_topfield, i_topfield );
1101 dvbsub_render_pdata( p_dec, p_region,
1102 p_region->p_object_defs[i].i_x,
1103 p_region->p_object_defs[i].i_y + 1,
1104 p_bottomfield, i_bottomfield );
1108 /* Duplicate the top field */
1109 dvbsub_render_pdata( p_dec, p_region,
1110 p_region->p_object_defs[i].i_x,
1111 p_region->p_object_defs[i].i_y + 1,
1112 p_topfield, i_topfield );
1119 /* DVB subtitling as characters */
1120 int i_number_of_codes = bs_read( s, 8 );
1121 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1124 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1125 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1127 msg_Dbg( p_dec, "corrupted object data" );
1131 for( p_region = p_sys->p_regions; p_region != NULL;
1132 p_region = p_region->p_next )
1134 for( i = 0; i < p_region->i_object_defs; i++ )
1138 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1140 p_region->p_object_defs[i].psz_text =
1141 realloc( p_region->p_object_defs[i].psz_text,
1142 i_number_of_codes + 1 );
1144 /* FIXME 16bits -> char ??? See Preamble */
1145 for( j = 0; j < i_number_of_codes; j++ )
1147 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1149 /* Null terminate the string */
1150 p_region->p_object_defs[i].psz_text[j] = 0;
1156 msg_Dbg( p_dec, "end object: %i", i_id );
1160 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1162 uint8_t *p_field, int i_field )
1169 if( !p_region->p_pixbuf )
1171 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1174 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1175 i_x >= p_region->i_width )
1177 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1181 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1182 bs_init( &bs, p_field, i_field );
1184 while( !bs_eof( &bs ) )
1187 if( i_y >= p_region->i_height ) return;
1189 switch( bs_read( &bs, 8 ) )
1192 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1197 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1202 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1209 /* We don't use map tables */
1212 case 0xf0: /* End of line code */
1213 p_pixbuf += 2*p_region->i_width;
1214 i_offset = 0; i_y += 2;
1220 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1222 bool b_stop = false;
1224 while( !b_stop && !bs_eof( s ) )
1226 int i_count = 0, i_color = 0;
1228 i_color = bs_read( s, 2 );
1229 if( i_color != 0x00 )
1235 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1237 i_count = 3 + bs_read( s, 3 );
1238 i_color = bs_read( s, 2 );
1242 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1244 switch( bs_read( s, 2 ) ) //Switch3
1253 i_count = 12 + bs_read( s, 4 );
1254 i_color = bs_read( s, 2 );
1257 i_count = 29 + bs_read( s, 8 );
1258 i_color = bs_read( s, 2 );
1266 /* 1 pixel color 0 */
1272 if( !i_count ) continue;
1275 if( ( i_count + *pi_off ) > i_width ) break;
1277 if( i_count == 1 ) p[*pi_off] = i_color;
1278 else memset( ( p + *pi_off ), i_color, i_count );
1280 (*pi_off) += i_count;
1286 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1288 bool b_stop = false;
1290 while( !b_stop && !bs_eof( s ) )
1292 int i_count = 0, i_color = 0;
1294 i_color = bs_read( s, 4 );
1295 if( i_color != 0x00 )
1302 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1304 if( bs_show( s, 3 ) != 0x00 )
1306 i_count = 2 + bs_read( s, 3 );
1316 if( bs_read( s, 1 ) == 0x00) //Switch2
1318 i_count = 4 + bs_read( s, 2 );
1319 i_color = bs_read( s, 4 );
1323 switch ( bs_read( s, 2 ) ) //Switch3
1332 i_count = 9 + bs_read( s, 4 );
1333 i_color = bs_read( s, 4 );
1336 i_count= 25 + bs_read( s, 8 );
1337 i_color = bs_read( s, 4 );
1344 if( !i_count ) continue;
1347 if( ( i_count + *pi_off ) > i_width ) break;
1349 if( i_count == 1 ) p[*pi_off] = i_color;
1350 else memset( ( p + *pi_off ), i_color, i_count );
1352 (*pi_off) += i_count;
1358 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1360 bool b_stop = false;
1362 while( !b_stop && !bs_eof( s ) )
1364 int i_count = 0, i_color = 0;
1366 i_color = bs_read( s, 8 );
1367 if( i_color != 0x00 )
1374 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1376 if( bs_show( s, 7 ) != 0x00 )
1378 i_count = bs_read( s, 7 );
1388 i_count = bs_read( s, 7 );
1389 i_color = bs_read( s, 8 );
1393 if( !i_count ) continue;
1396 if( ( i_count + *pi_off ) > i_width ) break;
1398 if( i_count == 1 ) p[*pi_off] = i_color;
1399 else memset( ( p + *pi_off ), i_color, i_count );
1401 (*pi_off) += i_count;
1407 static void free_all( decoder_t *p_dec )
1409 decoder_sys_t *p_sys = p_dec->p_sys;
1410 dvbsub_region_t *p_reg, *p_reg_next;
1411 dvbsub_clut_t *p_clut, *p_clut_next;
1413 free( p_sys->p_display );
1415 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1417 p_clut_next = p_clut->p_next;
1420 p_sys->p_cluts = NULL;
1422 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1426 p_reg_next = p_reg->p_next;
1427 for( i = 0; i < p_reg->i_object_defs; i++ )
1428 free( p_reg->p_object_defs[i].psz_text );
1429 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1430 free( p_reg->p_pixbuf );
1433 p_sys->p_regions = NULL;
1437 if( p_sys->p_page->i_region_defs )
1438 free( p_sys->p_page->p_region_defs );
1439 free( p_sys->p_page );
1441 p_sys->p_page = NULL;
1444 static subpicture_t *render( decoder_t *p_dec )
1446 decoder_sys_t *p_sys = p_dec->p_sys;
1447 subpicture_t *p_spu;
1448 subpicture_region_t **pp_spu_region;
1449 int i, j, i_timeout = 0;
1453 /* Allocate the subpicture internal data. */
1454 p_spu = decoder_NewSubpicture( p_dec );
1458 p_spu->b_absolute = p_sys->b_absolute;
1459 /* Set the pf_render callback */
1460 p_spu->i_start = (mtime_t) p_sys->i_pts;
1461 //p_spu->i_stop = (mtime_t) 0;
1462 p_spu->b_ephemer = true;
1463 //p_spu->b_fade = true;
1464 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1466 /* Correct positioning of SPU */
1467 i_base_x = p_sys->i_spu_x;
1468 i_base_y = p_sys->i_spu_y;
1469 p_spu->i_original_picture_width = 720;
1470 p_spu->i_original_picture_height = 576;
1472 if( p_sys->p_display )
1474 p_spu->i_original_picture_width = p_sys->p_display->i_width;
1475 p_spu->i_original_picture_height = p_sys->p_display->i_height;
1477 if( p_sys->p_display->b_windowed )
1479 /* TODO: check that this actually works */
1480 p_spu->i_original_picture_width = p_sys->p_display->i_max_x - p_sys->p_display->i_x;
1481 p_spu->i_original_picture_height = p_sys->p_display->i_max_y - p_sys->p_display->i_y;
1482 i_base_x += p_sys->p_display->i_x;
1483 i_base_y += p_sys->p_display->i_y;
1487 pp_spu_region = &p_spu->p_region;
1489 /* Loop on region definitions */
1492 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1495 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1497 dvbsub_region_t *p_region;
1498 dvbsub_regiondef_t *p_regiondef;
1499 dvbsub_clut_t *p_clut;
1500 dvbsub_color_t *p_color;
1501 subpicture_region_t *p_spu_region;
1502 uint8_t *p_src, *p_dst;
1504 video_palette_t palette;
1507 i_timeout = p_sys->p_page->i_timeout;
1509 p_regiondef = &p_sys->p_page->p_region_defs[i];
1512 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1513 p_regiondef->i_x, p_regiondef->i_y );
1516 /* Find associated region */
1517 for( p_region = p_sys->p_regions; p_region != NULL;
1518 p_region = p_region->p_next )
1520 if( p_regiondef->i_id == p_region->i_id ) break;
1525 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1529 /* Find associated CLUT */
1530 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1532 if( p_region->i_clut == p_clut->i_id ) break;
1536 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1540 /* FIXME: don't create a subpicture region with VLC CODEC YUVP
1541 * when it actually is a TEXT region */
1543 /* Create new SPU region */
1544 memset( &fmt, 0, sizeof(video_format_t) );
1545 fmt.i_chroma = VLC_CODEC_YUVP;
1546 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1547 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1548 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1549 fmt.i_x_offset = fmt.i_y_offset = 0;
1550 fmt.p_palette = &palette;
1551 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1552 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1553 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1554 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1555 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1557 fmt.p_palette->palette[j][0] = p_color[j].Y;
1558 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1559 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1560 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1563 p_spu_region = subpicture_region_New( &fmt );
1566 msg_Err( p_dec, "cannot allocate SPU region" );
1569 p_spu_region->i_x = i_base_x + p_regiondef->i_x;
1570 p_spu_region->i_y = i_base_y + p_regiondef->i_y;
1571 p_spu_region->i_align = p_sys->i_spu_position;
1572 *pp_spu_region = p_spu_region;
1573 pp_spu_region = &p_spu_region->p_next;
1575 p_src = p_region->p_pixbuf;
1576 p_dst = p_spu_region->p_picture->Y_PIXELS;
1577 i_pitch = p_spu_region->p_picture->Y_PITCH;
1579 /* Copy pixel buffer */
1580 for( j = 0; j < p_region->i_height; j++ )
1582 memcpy( p_dst, p_src, p_region->i_width );
1583 p_src += p_region->i_width;
1587 /* Check subtitles encoded as strings of characters
1588 * (since there are not rendered in the pixbuffer) */
1589 for( j = 0; j < p_region->i_object_defs; j++ )
1591 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1593 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1596 /* Create new SPU region */
1597 memset( &fmt, 0, sizeof(video_format_t) );
1598 fmt.i_chroma = VLC_CODEC_TEXT;
1599 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1600 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1601 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1602 fmt.i_x_offset = fmt.i_y_offset = 0;
1603 p_spu_region = subpicture_region_New( &fmt );
1606 msg_Err( p_dec, "cannot allocate SPU region" );
1610 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1611 p_spu_region->i_x = i_base_x + p_regiondef->i_x + p_object_def->i_x;
1612 p_spu_region->i_y = i_base_y + p_regiondef->i_y + p_object_def->i_y;
1613 p_spu_region->i_align = p_sys->i_spu_position;
1614 *pp_spu_region = p_spu_region;
1615 pp_spu_region = &p_spu_region->p_next;
1622 /*****************************************************************************
1623 * encoder_sys_t : encoder descriptor
1624 *****************************************************************************/
1625 typedef struct encoder_region_t
1632 struct encoder_sys_t
1634 unsigned int i_page_ver;
1635 unsigned int i_region_ver;
1636 unsigned int i_clut_ver;
1639 encoder_region_t *p_regions;
1643 /* subpicture positioning */
1648 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1649 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1650 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1651 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1653 /*****************************************************************************
1654 * OpenEncoder: probe the encoder and return score
1655 *****************************************************************************/
1656 static int OpenEncoder( vlc_object_t *p_this )
1658 encoder_t *p_enc = (encoder_t *)p_this;
1659 encoder_sys_t *p_sys;
1662 if( ( p_enc->fmt_out.i_codec != VLC_CODEC_DVBS ) &&
1665 return VLC_EGENERIC;
1668 /* Allocate the memory needed to store the decoder's structure */
1669 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1671 p_enc->p_sys = p_sys;
1673 p_enc->pf_encode_sub = Encode;
1674 p_enc->fmt_out.i_codec = VLC_CODEC_DVBS;
1675 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1677 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1679 p_sys->i_page_ver = 0;
1680 p_sys->i_region_ver = 0;
1681 p_sys->i_clut_ver = 0;
1682 p_sys->i_regions = 0;
1683 p_sys->p_regions = 0;
1685 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1686 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1687 p_sys->i_offset_x = val.i_int;
1688 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1689 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1690 p_sys->i_offset_y = val.i_int;
1695 /* FIXME: this routine is a hack to convert VLC_CODEC_YUVA
1696 * into VLC_CODEC_YUVP
1698 static subpicture_t *YuvaYuvp( subpicture_t *p_subpic )
1700 subpicture_region_t *p_region = NULL;
1702 if( !p_subpic ) return NULL;
1704 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1706 video_format_t *p_fmt = &p_region->fmt;
1707 int i = 0, j = 0, n = 0, p = 0;
1708 int i_max_entries = 256;
1710 #ifdef RANDOM_DITHERING
1711 int i_seed = 0xdeadbeef; /* random seed */
1715 int i_pixels = p_region->p_picture->p[0].i_visible_lines
1716 * p_region->p_picture->p[0].i_pitch;
1717 int i_iterator = p_region->p_picture->p[0].i_visible_lines * 3 / 4
1718 * p_region->p_picture->p[0].i_pitch
1719 + p_region->p_picture->p[0].i_pitch * 1 / 3;
1720 int i_tolerance = 0;
1723 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1725 p_fmt->i_chroma = VLC_CODEC_YUVP;
1726 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1727 if( !p_fmt->p_palette ) break;
1728 p_fmt->p_palette->i_entries = 0;
1730 /* Find best iterator using Euclide’s algorithm */
1731 for( ; i_iterator > 1 ; i_iterator-- )
1750 /* Count colors, build best palette */
1751 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1753 bool b_success = true;
1754 p_fmt->p_palette->i_entries = 0;
1756 for( i = 0; i < i_pixels ; )
1759 y = p_region->p_picture->p[0].p_pixels[i];
1760 u = p_region->p_picture->p[1].p_pixels[i];
1761 v = p_region->p_picture->p[2].p_pixels[i];
1762 a = p_region->p_picture->p[3].p_pixels[i];
1763 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1765 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1766 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1767 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1768 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1773 if( j == p_fmt->p_palette->i_entries )
1775 p_fmt->p_palette->palette[j][0] = y;
1776 p_fmt->p_palette->palette[j][1] = u;
1777 p_fmt->p_palette->palette[j][2] = v;
1778 p_fmt->p_palette->palette[j][3] = a;
1779 p_fmt->p_palette->i_entries++;
1781 if( p_fmt->p_palette->i_entries >= i_max_entries )
1800 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1803 #ifndef RANDOM_DITHERING
1804 pi_delta = malloc( ( p_region->p_picture->p[0].i_pitch + 1 )
1805 * sizeof(int) * 4 );
1806 for( i = 0; i < (p_region->p_picture->p[0].i_pitch + 1) * 4 ; i++ )
1812 /* Fill image with our new colours */
1813 for( p = 0; p < p_region->p_picture->p[0].i_visible_lines ; p++ )
1815 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1817 for( n = 0; n < p_region->p_picture->p[0].i_pitch ; n++ )
1819 int i_offset = p * p_region->p_picture->p[0].i_pitch + n;
1821 int i_mindist, i_best;
1823 y = (int)p_region->p_picture->p[0].p_pixels[i_offset];
1824 u = (int)p_region->p_picture->p[1].p_pixels[i_offset];
1825 v = (int)p_region->p_picture->p[2].p_pixels[i_offset];
1826 a = (int)p_region->p_picture->p[3].p_pixels[i_offset];
1828 /* Add dithering compensation */
1829 #ifdef RANDOM_DITHERING
1830 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1831 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1832 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1833 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1835 y += i_ydelta + pi_delta[ n * 4 ];
1836 u += i_udelta + pi_delta[ n * 4 + 1 ];
1837 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1838 a += i_adelta + pi_delta[ n * 4 + 3 ];
1841 /* Find best colour in palette */
1842 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1846 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1847 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1848 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1849 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1851 if( i_dist < i_mindist )
1858 /* Set pixel to best color */
1859 p_region->p_picture->p[0].p_pixels[i_offset] = i_best;
1861 /* Update dithering state */
1862 #ifdef RANDOM_DITHERING
1863 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1865 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1866 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1867 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1868 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1869 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1870 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1871 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1872 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1873 i_ydelta = i_ydelta * 5 / 8;
1874 i_udelta = i_udelta * 5 / 8;
1875 i_vdelta = i_vdelta * 5 / 8;
1876 i_adelta = i_adelta * 5 / 8;
1880 #ifndef RANDOM_DITHERING
1885 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1887 p_fmt->p_palette->palette[i][0] = 0;
1888 p_fmt->p_palette->palette[i][1] = 0;
1889 p_fmt->p_palette->palette[i][2] = 0;
1890 p_fmt->p_palette->palette[i][3] = 0;
1892 p_fmt->p_palette->i_entries = i_max_entries;
1894 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1900 /****************************************************************************
1901 * Encode: the whole thing
1902 ****************************************************************************/
1903 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1905 subpicture_t *p_temp = NULL;
1906 subpicture_region_t *p_region = NULL;
1907 bs_t bits, *s = &bits;
1910 if( !p_subpic || !p_subpic->p_region ) return NULL;
1912 /* FIXME: this is a hack to convert VLC_CODEC_YUVA into
1915 p_region = p_subpic->p_region;
1916 if( p_region->fmt.i_chroma == VLC_CODEC_YUVA )
1918 p_temp = YuvaYuvp( p_subpic );
1921 msg_Err( p_enc, "no picture in subpicture" );
1924 p_region = p_subpic->p_region;
1928 if( !p_region ) return NULL;
1930 if( ( p_region->fmt.i_chroma != VLC_CODEC_TEXT ) &&
1931 ( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) )
1934 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1935 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1936 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1940 if( p_region->fmt.p_palette )
1942 switch( p_region->fmt.p_palette->i_entries )
1950 msg_Err( p_enc, "subpicture palette (%d) not handled",
1951 p_region->fmt.p_palette->i_entries );
1958 msg_Dbg( p_enc, "encoding subpicture" );
1960 p_block = block_New( p_enc, 64000 );
1961 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1963 bs_write( s, 8, 0x20 ); /* Data identifier */
1964 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1966 encode_page_composition( p_enc, s, p_subpic );
1967 encode_region_composition( p_enc, s, p_subpic );
1968 encode_clut( p_enc, s, p_subpic );
1969 encode_object( p_enc, s, p_subpic );
1971 /* End of display */
1972 bs_write( s, 8, 0x0f ); /* Sync byte */
1973 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1974 bs_write( s, 16, 1 ); /* Page id */
1975 bs_write( s, 16, 0 ); /* Segment length */
1977 bs_write( s, 8, 0xff );/* End marker */
1978 p_block->i_buffer = bs_pos( s ) / 8;
1979 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1980 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
1982 block_t *p_block_stop;
1984 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1986 /* Send another (empty) subtitle to signal the end of display */
1987 p_block_stop = block_New( p_enc, 64000 );
1988 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1989 bs_write( s, 8, 0x20 ); /* Data identifier */
1990 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1991 encode_page_composition( p_enc, s, 0 );
1992 bs_write( s, 8, 0x0f ); /* Sync byte */
1993 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1994 bs_write( s, 16, 1 ); /* Page id */
1995 bs_write( s, 16, 0 ); /* Segment length */
1996 bs_write( s, 8, 0xff );/* End marker */
1997 p_block_stop->i_buffer = bs_pos( s ) / 8;
1998 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
1999 block_ChainAppend( &p_block, p_block_stop );
2000 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2003 msg_Dbg( p_enc, "subpicture encoded properly" );
2008 /*****************************************************************************
2009 * CloseEncoder: encoder destruction
2010 *****************************************************************************/
2011 static void CloseEncoder( vlc_object_t *p_this )
2013 encoder_t *p_enc = (encoder_t *)p_this;
2014 encoder_sys_t *p_sys = p_enc->p_sys;
2016 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2017 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2018 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2020 if( p_sys->i_regions ) free( p_sys->p_regions );
2024 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2025 subpicture_t *p_subpic )
2027 encoder_sys_t *p_sys = p_enc->p_sys;
2028 subpicture_region_t *p_region;
2029 bool b_mode_change = false;
2030 int i_regions, i_timeout;
2032 bs_write( s, 8, 0x0f ); /* Sync byte */
2033 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2034 bs_write( s, 16, 1 ); /* Page id */
2036 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2037 p_region; p_region = p_region->p_next, i_regions++ )
2039 if( i_regions >= p_sys->i_regions )
2041 encoder_region_t region;
2042 region.i_width = region.i_height = 0;
2044 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2045 (p_sys->i_regions + 1) );
2046 p_sys->p_regions[p_sys->i_regions++] = region;
2049 if( ( p_sys->p_regions[i_regions].i_width <
2050 (int)p_region->fmt.i_visible_width ) ||
2051 ( p_sys->p_regions[i_regions].i_width >
2052 (int)p_region->fmt.i_visible_width ) )
2054 b_mode_change = true;
2055 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2056 i_regions, p_sys->p_regions[i_regions].i_width,
2057 p_region->fmt.i_visible_width );
2058 p_sys->p_regions[i_regions].i_width =
2059 p_region->fmt.i_visible_width;
2061 if( p_sys->p_regions[i_regions].i_height <
2062 (int)p_region->fmt.i_visible_height )
2064 b_mode_change = true;
2065 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2066 i_regions, p_sys->p_regions[i_regions].i_height,
2067 p_region->fmt.i_visible_height );
2068 p_sys->p_regions[i_regions].i_height =
2069 p_region->fmt.i_visible_height;
2073 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2076 if( p_subpic && !p_subpic->b_ephemer &&
2077 ( p_subpic->i_stop > p_subpic->i_start ) )
2079 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2082 bs_write( s, 8, i_timeout ); /* Timeout */
2083 bs_write( s, 4, p_sys->i_page_ver++ );
2084 bs_write( s, 2, b_mode_change ?
2085 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2086 bs_write( s, 2, 0 ); /* Reserved */
2088 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2089 p_region; p_region = p_region->p_next, i_regions++ )
2091 bs_write( s, 8, i_regions );
2092 bs_write( s, 8, 0 ); /* Reserved */
2093 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2095 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2096 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2100 bs_write( s, 16, p_region->i_x );
2101 bs_write( s, 16, p_region->i_y );
2106 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2108 encoder_sys_t *p_sys = p_enc->p_sys;
2109 subpicture_region_t *p_region = p_subpic->p_region;
2110 video_palette_t *p_pal, pal;
2114 if( !p_region ) return;
2116 if( p_region->fmt.i_chroma == VLC_CODEC_YUVP )
2118 p_pal = p_region->fmt.p_palette;
2123 for( i = 0; i < 4; i++ )
2125 pal.palette[i][0] = 0;
2126 pal.palette[i][1] = 0;
2127 pal.palette[i][2] = 0;
2128 pal.palette[i][3] = 0;
2133 bs_write( s, 8, 0x0f ); /* Sync byte */
2134 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2135 bs_write( s, 16, 1 ); /* Page id */
2137 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2138 bs_write( s, 8, 1 ); /* Clut id */
2139 bs_write( s, 4, p_sys->i_clut_ver++ );
2140 bs_write( s, 4, 0 ); /* Reserved */
2142 for( i = 0; i < p_pal->i_entries; i++ )
2144 bs_write( s, 8, i ); /* Clut entry id */
2145 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2146 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2147 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2148 bs_write( s, 4, 0 ); /* Reserved */
2149 bs_write( s, 1, 1 ); /* Full range flag */
2150 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2151 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2152 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2153 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2154 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2158 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2159 subpicture_t *p_subpic )
2161 encoder_sys_t *p_sys = p_enc->p_sys;
2162 subpicture_region_t *p_region;
2165 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2166 p_region = p_region->p_next, i_region++ )
2168 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2170 ( p_region->fmt.i_chroma == VLC_CODEC_TEXT );
2174 video_palette_t *p_pal = p_region->fmt.p_palette;
2178 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2182 i_entries = p_pal->i_entries;
2183 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2185 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2187 if( !p_pal->palette[i_bg][3] ) break;
2191 bs_write( s, 8, 0x0f ); /* Sync byte */
2192 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2193 bs_write( s, 16, 1 ); /* Page id */
2195 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2196 bs_write( s, 8, i_region );
2197 bs_write( s, 4, p_sys->i_region_ver++ );
2199 /* Region attributes */
2200 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2201 bs_write( s, 3, 0 ); /* Reserved */
2202 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2203 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2204 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2205 bs_write( s, 3, i_depth ); /* Region depth */
2206 bs_write( s, 2, 0 ); /* Reserved */
2207 bs_write( s, 8, 1 ); /* Clut id */
2208 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2209 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2210 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2211 bs_write( s, 2, 0 ); /* Reserved */
2213 /* In our implementation we only have 1 object per region */
2214 bs_write( s, 16, i_region );
2215 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2216 bs_write( s, 2, 0 ); /* object provider flag */
2217 bs_write( s, 12, 0 );/* object horizontal position */
2218 bs_write( s, 4, 0 ); /* Reserved */
2219 bs_write( s, 12, 0 );/* object vertical position */
2223 bs_write( s, 8, 1 ); /* foreground pixel code */
2224 bs_write( s, 8, 0 ); /* background pixel code */
2229 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2230 subpicture_region_t *p_region,
2233 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2235 encoder_sys_t *p_sys = p_enc->p_sys;
2236 subpicture_region_t *p_region;
2239 int i_length_pos, i_update_pos, i_pixel_data_pos;
2241 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2242 p_region = p_region->p_next, i_region++ )
2244 bs_write( s, 8, 0x0f ); /* Sync byte */
2245 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2246 bs_write( s, 16, 1 ); /* Page id */
2248 i_length_pos = bs_pos( s );
2249 bs_write( s, 16, 0 ); /* Segment length */
2250 bs_write( s, 16, i_region ); /* Object id */
2251 bs_write( s, 4, p_sys->i_region_ver++ );
2253 /* object coding method */
2254 switch( p_region->fmt.i_chroma )
2256 case VLC_CODEC_YUVP:
2257 bs_write( s, 2, 0 );
2259 case VLC_CODEC_TEXT:
2260 bs_write( s, 2, 1 );
2263 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2267 bs_write( s, 1, 0 ); /* non modifying color flag */
2268 bs_write( s, 1, 0 ); /* Reserved */
2270 if( p_region->fmt.i_chroma == VLC_CODEC_TEXT )
2274 if( !p_region->psz_text ) continue;
2276 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2278 bs_write( s, 8, i_size ); /* number of characters in string */
2279 for( i = 0; i < i_size; i++ )
2281 bs_write( s, 16, p_region->psz_text[i] );
2284 /* Update segment length */
2285 SetWBE( &s->p_start[i_length_pos/8],
2286 (bs_pos(s) - i_length_pos)/8 -2 );
2290 /* Coding of a bitmap object */
2291 i_update_pos = bs_pos( s );
2292 bs_write( s, 16, 0 ); /* topfield data block length */
2293 bs_write( s, 16, 0 ); /* bottomfield data block length */
2296 i_pixel_data_pos = bs_pos( s );
2297 encode_pixel_data( p_enc, s, p_region, true );
2298 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2299 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2302 i_pixel_data_pos = bs_pos( s );
2303 encode_pixel_data( p_enc, s, p_region, false );
2304 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2305 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2307 /* Stuffing for word alignment */
2309 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2311 /* Update segment length */
2312 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2316 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2318 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2320 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2322 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2323 subpicture_region_t *p_region,
2326 unsigned int i_line;
2329 if( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) return;
2331 /* Encode line by line */
2332 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2335 switch( p_region->fmt.p_palette->i_entries )
2341 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2342 encode_pixel_line_2bp( s, p_region, i_line );
2346 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2347 encode_pixel_line_4bp( s, p_region, i_line );
2351 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2352 encode_pixel_line_8bp( s, p_region, i_line );
2356 msg_Err( p_enc, "subpicture palette (%i) not handled",
2357 p_region->fmt.p_palette->i_entries );
2361 bs_write( s, 8, 0xf0 ); /* End of object line code */
2365 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2368 unsigned int i, i_length = 0;
2369 int i_pitch = p_region->p_picture->p->i_pitch;
2370 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2371 int i_last_pixel = p_data[0];
2373 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2375 if( ( i != p_region->fmt.i_visible_width ) &&
2376 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2382 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2384 /* 2bit/pixel code */
2386 bs_write( s, 2, i_last_pixel );
2389 bs_write( s, 2, 0 );
2390 bs_write( s, 1, 0 );
2391 bs_write( s, 1, 1 ); /* pseudo color 0 */
2400 bs_write( s, 2, i_last_pixel );
2401 bs_write( s, 2, i_last_pixel );
2405 bs_write( s, 2, 0 );
2406 bs_write( s, 1, 0 );
2407 bs_write( s, 1, 0 );
2408 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2411 else if( i_length > 2 )
2413 bs_write( s, 2, 0 );
2414 if( i_length <= 10 )
2416 bs_write( s, 1, 1 );
2417 bs_write( s, 3, i_length - 3 );
2418 bs_write( s, 2, i_last_pixel );
2422 bs_write( s, 1, 0 );
2423 bs_write( s, 1, 0 );
2425 if( i_length <= 27 )
2427 bs_write( s, 2, 2 );
2428 bs_write( s, 4, i_length - 12 );
2429 bs_write( s, 2, i_last_pixel );
2433 bs_write( s, 2, 3 );
2434 bs_write( s, 8, i_length - 29 );
2435 bs_write( s, 2, i_last_pixel );
2440 if( i == p_region->fmt.i_visible_width ) break;
2442 i_last_pixel = p_data[i];
2447 bs_write( s, 2, 0 );
2448 bs_write( s, 1, 0 );
2449 bs_write( s, 1, 0 );
2450 bs_write( s, 2, 0 );
2456 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2459 unsigned int i, i_length = 0;
2460 int i_pitch = p_region->p_picture->p->i_pitch;
2461 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2462 int i_last_pixel = p_data[0];
2464 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2466 if( i != p_region->fmt.i_visible_width &&
2467 p_data[i] == i_last_pixel && i_length != 280 )
2473 if( ( i_length == 1 ) ||
2474 ( ( i_length == 3 ) && i_last_pixel ) ||
2477 /* 4bit/pixel code */
2479 bs_write( s, 4, i_last_pixel );
2482 bs_write( s, 4, 0 );
2483 bs_write( s, 1, 1 );
2484 bs_write( s, 1, 1 );
2485 bs_write( s, 2, 0 ); /* pseudo color 0 */
2494 bs_write( s, 4, i_last_pixel );
2495 bs_write( s, 4, i_last_pixel );
2499 bs_write( s, 4, 0 );
2500 bs_write( s, 1, 1 );
2501 bs_write( s, 1, 1 );
2502 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2505 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2507 bs_write( s, 4, 0 );
2508 bs_write( s, 1, 0 );
2509 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2511 else if( i_length > 2 )
2513 bs_write( s, 4, 0 );
2514 bs_write( s, 1, 1 );
2518 bs_write( s, 1, 0 );
2519 bs_write( s, 2, i_length - 4 );
2520 bs_write( s, 4, i_last_pixel );
2524 bs_write( s, 1, 1 );
2526 if( i_length <= 24 )
2528 bs_write( s, 2, 2 );
2529 bs_write( s, 4, i_length - 9 );
2530 bs_write( s, 4, i_last_pixel );
2534 bs_write( s, 2, 3 );
2535 bs_write( s, 8, i_length - 25 );
2536 bs_write( s, 4, i_last_pixel );
2541 if( i == p_region->fmt.i_visible_width ) break;
2543 i_last_pixel = p_data[i];
2548 bs_write( s, 8, 0 );
2554 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2557 unsigned int i, i_length = 0;
2558 int i_pitch = p_region->p_picture->p->i_pitch;
2559 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2560 int i_last_pixel = p_data[0];
2562 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2564 if( ( i != p_region->fmt.i_visible_width ) &&
2565 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2571 if( ( i_length == 1 ) && i_last_pixel )
2573 /* 8bit/pixel code */
2574 bs_write( s, 8, i_last_pixel );
2576 else if( ( i_length == 2 ) && i_last_pixel )
2578 /* 8bit/pixel code */
2579 bs_write( s, 8, i_last_pixel );
2580 bs_write( s, 8, i_last_pixel );
2582 else if( i_length <= 127 )
2584 bs_write( s, 8, 0 );
2588 bs_write( s, 1, 0 );
2589 bs_write( s, 7, i_length ); /* pseudo color 0 */
2593 bs_write( s, 1, 1 );
2594 bs_write( s, 7, i_length );
2595 bs_write( s, 8, i_last_pixel );
2599 if( i == p_region->fmt.i_visible_width ) break;
2601 i_last_pixel = p_data[i];
2606 bs_write( s, 8, 0 );
2607 bs_write( s, 8, 0 );