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 *****************************************************************************/
48 #include <vlc_codec.h>
53 /* #define DEBUG_DVBSUB 1 */
55 #define POSX_TEXT N_("Decoding X coordinate")
56 #define POSX_LONGTEXT N_("X coordinate of the rendered subtitle")
58 #define POSY_TEXT N_("Decoding Y coordinate")
59 #define POSY_LONGTEXT N_("Y coordinate of the rendered subtitle")
61 #define POS_TEXT N_("Subpicture position")
62 #define POS_LONGTEXT N_( \
63 "You can enforce the subpicture position on the video " \
64 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
65 "also use combinations of these values, e.g. 6=top-right).")
67 #define ENC_POSX_TEXT N_("Encoding X coordinate")
68 #define ENC_POSX_LONGTEXT N_("X coordinate of the encoded subtitle" )
69 #define ENC_POSY_TEXT N_("Encoding Y coordinate")
70 #define ENC_POSY_LONGTEXT N_("Y coordinate of the encoded subtitle" )
72 static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
73 static const char *ppsz_pos_descriptions[] =
74 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
75 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
77 /*****************************************************************************
79 *****************************************************************************/
80 static int Open ( vlc_object_t * );
81 static void Close( vlc_object_t * );
82 static subpicture_t *Decode( decoder_t *, block_t ** );
84 static int OpenEncoder ( vlc_object_t * );
85 static void CloseEncoder( vlc_object_t * );
86 static block_t *Encode ( encoder_t *, subpicture_t * );
89 # define DVBSUB_CFG_PREFIX "dvbsub-"
90 set_description( _("DVB subtitles decoder") );
91 set_capability( "decoder", 50 );
92 set_category( CAT_INPUT );
93 set_subcategory( SUBCAT_INPUT_SCODEC );
94 set_callbacks( Open, Close );
96 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, VLC_TRUE );
97 change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
98 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
99 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
101 # define ENC_CFG_PREFIX "sout-dvbsub-"
103 set_description( _("DVB subtitles encoder") );
104 set_capability( "encoder", 100 );
105 set_callbacks( OpenEncoder, CloseEncoder );
107 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, VLC_FALSE );
108 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, VLC_FALSE );
109 add_obsolete_integer( ENC_CFG_PREFIX "timeout" ); /* Suppressed since 0.8.5 */
112 static const char *ppsz_enc_options[] = { "x", "y", NULL };
114 /****************************************************************************
116 ****************************************************************************
117 * Those structures refer closely to the ETSI 300 743 Object model
118 ****************************************************************************/
120 /* The object definition gives the position of the object in a region [7.2.5] */
121 typedef struct dvbsub_objectdef_s
129 char *psz_text; /* for string of characters objects */
131 } dvbsub_objectdef_t;
133 /* The entry in the palette CLUT */
143 /* The displays dimensions [7.2.1] */
144 typedef struct dvbsub_display_s
152 vlc_bool_t b_windowed;
161 typedef struct dvbsub_clut_s
165 dvbsub_color_t c_2b[4];
166 dvbsub_color_t c_4b[16];
167 dvbsub_color_t c_8b[256];
169 struct dvbsub_clut_s *p_next;
173 /* The Region is an aera on the image [7.2.3]
174 * with a list of the object definitions associated and a CLUT */
175 typedef struct dvbsub_region_s
190 dvbsub_objectdef_t *p_object_defs;
192 struct dvbsub_region_s *p_next;
196 /* The object definition gives the position of the object in a region */
197 typedef struct dvbsub_regiondef_s
203 } dvbsub_regiondef_t;
205 /* The page defines the list of regions [7.2.2] */
209 int i_timeout; /* in seconds */
214 dvbsub_regiondef_t *p_region_defs;
222 /* Decoder internal data */
227 vlc_bool_t b_absolute;
233 dvbsub_page_t *p_page;
234 dvbsub_region_t *p_regions;
235 dvbsub_clut_t *p_cluts;
236 dvbsub_display_t *p_display;
237 dvbsub_clut_t default_clut;
241 /* List of different SEGMENT TYPES */
242 /* According to EN 300-743, table 2 */
243 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
244 #define DVBSUB_ST_REGION_COMPOSITION 0x11
245 #define DVBSUB_ST_CLUT_DEFINITION 0x12
246 #define DVBSUB_ST_OBJECT_DATA 0x13
247 #define DVBSUB_ST_DISPLAY_DEFINITION 0x14
248 #define DVBSUB_ST_ENDOFDISPLAY 0x80
249 #define DVBSUB_ST_STUFFING 0xff
250 /* List of different OBJECT TYPES */
251 /* According to EN 300-743, table 6 */
252 #define DVBSUB_OT_BASIC_BITMAP 0x00
253 #define DVBSUB_OT_BASIC_CHAR 0x01
254 #define DVBSUB_OT_COMPOSITE_STRING 0x02
255 /* Pixel DATA TYPES */
256 /* According to EN 300-743, table 9 */
257 #define DVBSUB_DT_2BP_CODE_STRING 0x10
258 #define DVBSUB_DT_4BP_CODE_STRING 0x11
259 #define DVBSUB_DT_8BP_CODE_STRING 0x12
260 #define DVBSUB_DT_24_TABLE_DATA 0x20
261 #define DVBSUB_DT_28_TABLE_DATA 0x21
262 #define DVBSUB_DT_48_TABLE_DATA 0x22
263 #define DVBSUB_DT_END_LINE 0xf0
264 /* List of different Page Composition Segment state */
265 /* According to EN 300-743, 7.2.1 table 3 */
266 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
267 #define DVBSUB_PCS_STATE_CHANGE 0x02
269 /*****************************************************************************
271 *****************************************************************************/
272 static void decode_segment( decoder_t *, bs_t * );
273 static void decode_page_composition( decoder_t *, bs_t * );
274 static void decode_region_composition( decoder_t *, bs_t * );
275 static void decode_object( decoder_t *, bs_t * );
276 static void decode_display_definition( decoder_t *, bs_t * );
277 static void decode_clut( decoder_t *, bs_t * );
278 static void free_all( decoder_t * );
280 static void default_clut_init( decoder_t * );
282 static subpicture_t *render( decoder_t * );
284 /*****************************************************************************
285 * Open: probe the decoder and return score
286 *****************************************************************************
287 * Tries to launch a decoder and return score so that the interface is able
289 *****************************************************************************/
290 static int Open( vlc_object_t *p_this )
292 decoder_t *p_dec = (decoder_t *) p_this;
293 decoder_sys_t *p_sys;
297 if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','v','b','s') )
302 p_dec->pf_decode_sub = Decode;
303 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
306 msg_Err( p_dec, "out of memory" );
309 memset( p_sys, 0, sizeof(decoder_sys_t) );
311 p_sys->i_pts = (mtime_t) 0;
312 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
313 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
315 p_sys->p_regions = NULL;
316 p_sys->p_cluts = NULL;
317 p_sys->p_page = NULL;
318 p_sys->p_display = NULL;
320 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
321 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
322 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
323 p_sys->i_spu_position = val.i_int;
324 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
325 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
326 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
328 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
329 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
330 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
333 /* Check if subpicture position was overridden */
334 p_sys->b_absolute = VLC_FALSE;
335 p_sys->i_spu_x = p_sys->i_spu_y = 0;
337 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
339 p_sys->b_absolute = VLC_TRUE;
340 p_sys->i_spu_x = i_posx;
341 p_sys->i_spu_y = i_posy;
344 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
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: "I64Fd, p_sys->i_pts );
412 p_sys->b_page = VLC_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) );
637 p_clut->p_next = p_sys->p_cluts;
638 p_sys->p_cluts = p_clut;
641 /* Initialize to default clut */
642 p_next = p_clut->p_next;
643 *p_clut = p_sys->default_clut;
644 p_clut->p_next = p_next;
646 /* We don't have this version of the CLUT: Parse it */
647 p_clut->i_version = i_version;
649 bs_skip( s, 4 ); /* Reserved bits */
650 i_processed_length = 2;
651 while( i_processed_length < i_segment_length )
653 uint8_t y, cb, cr, t;
657 i_id = bs_read( s, 8 );
658 i_type = bs_read( s, 3 );
662 if( bs_read( s, 1 ) )
665 cr = bs_read( s, 8 );
666 cb = bs_read( s, 8 );
668 i_processed_length += 6;
672 y = bs_read( s, 6 ) << 2;
673 cr = bs_read( s, 4 ) << 4;
674 cb = bs_read( s, 4 ) << 4;
675 t = bs_read( s, 2 ) << 6;
676 i_processed_length += 4;
679 /* We are not entirely compliant here as full transparency is indicated
680 * with a luma value of zero, not a transparency value of 0xff
681 * (full transparency would actually be 0xff + 1). */
688 /* According to EN 300-743 section 7.2.3 note 1, type should
689 * not have more than 1 bit set to one, but some streams don't
690 * respect this note. */
691 if( ( i_type & 0x04 ) && ( i_id < 4 ) )
693 p_clut->c_2b[i_id].Y = y;
694 p_clut->c_2b[i_id].Cr = cr;
695 p_clut->c_2b[i_id].Cb = cb;
696 p_clut->c_2b[i_id].T = t;
698 if( ( i_type & 0x02 ) && ( i_id < 16 ) )
700 p_clut->c_4b[i_id].Y = y;
701 p_clut->c_4b[i_id].Cr = cr;
702 p_clut->c_4b[i_id].Cb = cb;
703 p_clut->c_4b[i_id].T = t;
707 p_clut->c_8b[i_id].Y = y;
708 p_clut->c_8b[i_id].Cr = cr;
709 p_clut->c_8b[i_id].Cb = cb;
710 p_clut->c_8b[i_id].T = t;
715 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
717 decoder_sys_t *p_sys = p_dec->p_sys;
718 int i_version, i_state, i_segment_length, i_timeout, i;
720 /* A page is composed by 0 or more region */
721 i_segment_length = bs_read( s, 16 );
722 i_timeout = bs_read( s, 8 );
723 i_version = bs_read( s, 4 );
724 i_state = bs_read( s, 2 );
725 bs_skip( s, 2 ); /* Reserved */
727 if( i_state == DVBSUB_PCS_STATE_CHANGE )
729 /* End of an epoch, reset decoder buffer */
731 msg_Dbg( p_dec, "page composition mode change" );
735 else if( !p_sys->p_page && ( i_state != DVBSUB_PCS_STATE_ACQUISITION ) &&
736 ( i_state != DVBSUB_PCS_STATE_CHANGE ) )
738 /* Not a full PCS, we need to wait for one */
739 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
742 /* Try to start decoding even without an acquisition page */
743 bs_skip( s, 8 * (i_segment_length - 2) );
749 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
750 msg_Dbg( p_dec, "acquisition page composition" );
753 /* Check version number */
754 if( p_sys->p_page && ( p_sys->p_page->i_version == i_version ) )
756 bs_skip( s, 8 * (i_segment_length - 2) );
759 else if( p_sys->p_page )
761 if( p_sys->p_page->i_region_defs )
762 free( p_sys->p_page->p_region_defs );
763 p_sys->p_page->p_region_defs = NULL;
764 p_sys->p_page->i_region_defs = 0;
770 msg_Dbg( p_dec, "new page" );
772 /* Allocate a new page */
773 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
776 p_sys->p_page->i_version = i_version;
777 p_sys->p_page->i_timeout = i_timeout;
778 p_sys->b_page = VLC_TRUE;
780 /* Number of regions */
781 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
783 if( p_sys->p_page->i_region_defs == 0 ) return;
785 p_sys->p_page->p_region_defs =
786 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
787 if( p_sys->p_page->p_region_defs )
789 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
791 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
792 bs_skip( s, 8 ); /* Reserved */
793 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
794 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
797 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
798 i, p_sys->p_page->p_region_defs[i].i_x,
799 p_sys->p_page->p_region_defs[i].i_y );
805 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
807 decoder_sys_t *p_sys = p_dec->p_sys;
808 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
809 int i_segment_length, i_processed_length, i_id, i_version;
810 int i_width, i_height, i_level_comp, i_depth, i_clut;
811 int i_8_bg, i_4_bg, i_2_bg;
814 i_segment_length = bs_read( s, 16 );
815 i_id = bs_read( s, 8 );
816 i_version = bs_read( s, 4 );
818 /* Check if we already have this region */
819 for( p_region = p_sys->p_regions; p_region != NULL;
820 p_region = p_region->p_next )
822 pp_region = &p_region->p_next;
823 if( p_region->i_id == i_id ) break;
826 /* Check version number */
827 if( p_region && ( p_region->i_version == i_version ) )
829 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
836 msg_Dbg( p_dec, "new region: %i", i_id );
838 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
841 memset( p_region, 0, sizeof(dvbsub_region_t) );
842 p_region->p_object_defs = NULL;
843 p_region->p_pixbuf = NULL;
844 p_region->p_next = NULL;
848 /* Region attributes */
849 p_region->i_id = i_id;
850 p_region->i_version = i_version;
851 b_fill = bs_read( s, 1 );
852 bs_skip( s, 3 ); /* Reserved */
854 i_width = bs_read( s, 16 );
855 i_height = bs_read( s, 16 );
857 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
859 i_level_comp = bs_read( s, 3 );
860 i_depth = bs_read( s, 3 );
861 bs_skip( s, 2 ); /* Reserved */
862 i_clut = bs_read( s, 8 );
864 i_8_bg = bs_read( s, 8 );
865 i_4_bg = bs_read( s, 4 );
866 i_2_bg = bs_read( s, 2 );
867 bs_skip( s, 2 ); /* Reserved */
869 /* Free old object defs */
870 while( p_region->i_object_defs )
872 int i = p_region->i_object_defs - 1;
873 free( p_region->p_object_defs[i].psz_text );
875 free( p_region->p_object_defs );
877 p_region->i_object_defs--;
879 p_region->p_object_defs = NULL;
881 /* Extra sanity checks */
882 if( ( p_region->i_width != i_width ) ||
883 ( p_region->i_height != i_height ) )
885 if( p_region->p_pixbuf )
887 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
888 p_region->i_width, p_region->i_height, i_width, i_height );
889 free( p_region->p_pixbuf );
892 p_region->p_pixbuf = malloc( i_height * i_width );
893 p_region->i_depth = 0;
896 if( p_region->i_depth &&
897 ( ( p_region->i_depth != i_depth ) ||
898 ( p_region->i_level_comp != i_level_comp ) ||
899 ( p_region->i_clut != i_clut) ) )
901 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
904 /* Erase background of region */
907 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
908 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
909 memset( p_region->p_pixbuf, i_background, i_width * i_height );
912 p_region->i_width = i_width;
913 p_region->i_height = i_height;
914 p_region->i_level_comp = i_level_comp;
915 p_region->i_depth = i_depth;
916 p_region->i_clut = i_clut;
918 /* List of objects in the region */
919 i_processed_length = 10;
920 while( i_processed_length < i_segment_length )
922 dvbsub_objectdef_t *p_obj;
924 /* We create a new object */
925 p_region->i_object_defs++;
926 p_region->p_object_defs =
927 realloc( p_region->p_object_defs,
928 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
930 /* We parse object properties */
931 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
932 p_obj->i_id = bs_read( s, 16 );
933 p_obj->i_type = bs_read( s, 2 );
934 bs_skip( s, 2 ); /* Provider */
935 p_obj->i_x = bs_read( s, 12 );
936 bs_skip( s, 4 ); /* Reserved */
937 p_obj->i_y = bs_read( s, 12 );
940 i_processed_length += 6;
942 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
943 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
945 p_obj->i_fg_pc = bs_read( s, 8 );
946 p_obj->i_bg_pc = bs_read( s, 8 );
947 i_processed_length += 2;
952 /* ETSI 300 743 [7.2.1] */
953 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
955 decoder_sys_t *p_sys = p_dec->p_sys;
956 uint16_t i_segment_length;
957 uint16_t i_processed_length = 40;
958 dvbsub_display_t *p_display;
959 dvbsub_display_t *p_old = p_sys->p_display;
962 i_segment_length = bs_read( s, 16 );
963 i_version = bs_read( s, 4 );
965 /* Check version number */
966 if( p_old && ( p_old->i_version == i_version ) )
968 /* The definition did not change */
969 bs_skip( s, 8*i_segment_length - 4 );
974 msg_Dbg( p_dec, "new display definition: %i", i_version );
976 p_display = malloc( sizeof(dvbsub_display_t) );
979 /* We don't have this version of the display definition: Parse it */
980 p_display->i_version = i_version;
981 p_display->b_windowed = bs_read( s, 1 );
982 bs_skip( s, 3 ); /* Reserved bits */
983 p_display->i_width = bs_read( s, 16 )+1;
984 p_display->i_height = bs_read( s, 16 )+1;
986 if( p_display->b_windowed )
989 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
991 /* Coordinates are measured from the top left corner */
992 p_display->i_x = bs_read( s, 16 );
993 p_display->i_max_x = bs_read( s, 16 );
994 p_display->i_y = bs_read( s, 16 );
995 p_display->i_max_y = bs_read( s, 16 );
996 i_processed_length += 64;
1000 p_sys->p_display = p_display;
1003 if( i_processed_length != i_segment_length*8 )
1005 msg_Err( p_dec, "processed length %d != segment length %d",
1006 i_processed_length, i_segment_length );
1010 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1011 p_display->i_version, p_display->i_width, p_display->i_height );
1012 if( p_display->b_windowed )
1013 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1014 p_display->i_x, p_display->i_max_x, p_display->i_y, p_display->i_max_y );
1018 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1020 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1021 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1022 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1024 static void decode_object( decoder_t *p_dec, bs_t *s )
1026 decoder_sys_t *p_sys = p_dec->p_sys;
1027 dvbsub_region_t *p_region;
1028 int i_segment_length, i_coding_method, i_version, i_id, i;
1029 vlc_bool_t b_non_modify_color;
1031 /* ETSI 300-743 paragraph 7.2.4
1032 * sync_byte, segment_type and page_id have already been processed.
1034 i_segment_length = bs_read( s, 16 );
1035 i_id = bs_read( s, 16 );
1036 i_version = bs_read( s, 4 );
1037 i_coding_method = bs_read( s, 2 );
1039 if( i_coding_method > 1 )
1041 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1042 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1046 /* Check if the object needs to be rendered in at least one
1048 for( p_region = p_sys->p_regions; p_region != NULL;
1049 p_region = p_region->p_next )
1051 for( i = 0; i < p_region->i_object_defs; i++ )
1052 if( p_region->p_object_defs[i].i_id == i_id ) break;
1054 if( i != p_region->i_object_defs ) break;
1058 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1063 msg_Dbg( p_dec, "new object: %i", i_id );
1066 b_non_modify_color = bs_read( s, 1 );
1067 bs_skip( s, 1 ); /* Reserved */
1069 if( i_coding_method == 0x00 )
1071 int i_topfield, i_bottomfield;
1072 uint8_t *p_topfield, *p_bottomfield;
1074 i_topfield = bs_read( s, 16 );
1075 i_bottomfield = bs_read( s, 16 );
1076 p_topfield = s->p_start + bs_pos( s ) / 8;
1077 p_bottomfield = p_topfield + i_topfield;
1079 bs_skip( s, 8 * (i_segment_length - 7) );
1082 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1083 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1085 msg_Dbg( p_dec, "corrupted object data" );
1089 for( p_region = p_sys->p_regions; p_region != NULL;
1090 p_region = p_region->p_next )
1092 for( i = 0; i < p_region->i_object_defs; i++ )
1094 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1096 dvbsub_render_pdata( p_dec, p_region,
1097 p_region->p_object_defs[i].i_x,
1098 p_region->p_object_defs[i].i_y,
1099 p_topfield, i_topfield );
1103 dvbsub_render_pdata( p_dec, p_region,
1104 p_region->p_object_defs[i].i_x,
1105 p_region->p_object_defs[i].i_y + 1,
1106 p_bottomfield, i_bottomfield );
1110 /* Duplicate the top field */
1111 dvbsub_render_pdata( p_dec, p_region,
1112 p_region->p_object_defs[i].i_x,
1113 p_region->p_object_defs[i].i_y + 1,
1114 p_topfield, i_topfield );
1121 /* DVB subtitling as characters */
1122 int i_number_of_codes = bs_read( s, 8 );
1123 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1126 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1127 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1129 msg_Dbg( p_dec, "corrupted object data" );
1133 for( p_region = p_sys->p_regions; p_region != NULL;
1134 p_region = p_region->p_next )
1136 for( i = 0; i < p_region->i_object_defs; i++ )
1140 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1142 p_region->p_object_defs[i].psz_text =
1143 realloc( p_region->p_object_defs[i].psz_text,
1144 i_number_of_codes + 1 );
1146 /* FIXME 16bits -> char ??? See Preamble */
1147 for( j = 0; j < i_number_of_codes; j++ )
1149 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1151 /* Null terminate the string */
1152 p_region->p_object_defs[i].psz_text[j] = 0;
1158 msg_Dbg( p_dec, "end object: %i", i_id );
1162 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1164 uint8_t *p_field, int i_field )
1171 if( !p_region->p_pixbuf )
1173 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1176 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1177 i_x >= p_region->i_width )
1179 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1183 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1184 bs_init( &bs, p_field, i_field );
1186 while( !bs_eof( &bs ) )
1189 if( i_y >= p_region->i_height ) return;
1191 switch( bs_read( &bs, 8 ) )
1194 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1199 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1204 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1211 /* We don't use map tables */
1214 case 0xf0: /* End of line code */
1215 p_pixbuf += 2*p_region->i_width;
1216 i_offset = 0; i_y += 2;
1222 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1224 vlc_bool_t b_stop = VLC_FALSE;
1226 while( !b_stop && !bs_eof( s ) )
1228 int i_count = 0, i_color = 0;
1230 i_color = bs_read( s, 2 );
1231 if( i_color != 0x00 )
1237 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1239 i_count = 3 + bs_read( s, 3 );
1240 i_color = bs_read( s, 2 );
1244 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1246 switch( bs_read( s, 2 ) ) //Switch3
1255 i_count = 12 + bs_read( s, 4 );
1256 i_color = bs_read( s, 2 );
1259 i_count = 29 + bs_read( s, 8 );
1260 i_color = bs_read( s, 2 );
1268 /* 1 pixel color 0 */
1274 if( !i_count ) continue;
1277 if( ( i_count + *pi_off ) > i_width ) break;
1279 if( i_count == 1 ) p[*pi_off] = i_color;
1280 else memset( ( p + *pi_off ), i_color, i_count );
1282 (*pi_off) += i_count;
1288 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1290 vlc_bool_t b_stop = VLC_FALSE;
1292 while( !b_stop && !bs_eof( s ) )
1294 int i_count = 0, i_color = 0;
1296 i_color = bs_read( s, 4 );
1297 if( i_color != 0x00 )
1304 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1306 if( bs_show( s, 3 ) != 0x00 )
1308 i_count = 2 + bs_read( s, 3 );
1318 if( bs_read( s, 1 ) == 0x00) //Switch2
1320 i_count = 4 + bs_read( s, 2 );
1321 i_color = bs_read( s, 4 );
1325 switch ( bs_read( s, 2 ) ) //Switch3
1334 i_count = 9 + bs_read( s, 4 );
1335 i_color = bs_read( s, 4 );
1338 i_count= 25 + bs_read( s, 8 );
1339 i_color = bs_read( s, 4 );
1346 if( !i_count ) continue;
1349 if( ( i_count + *pi_off ) > i_width ) break;
1351 if( i_count == 1 ) p[*pi_off] = i_color;
1352 else memset( ( p + *pi_off ), i_color, i_count );
1354 (*pi_off) += i_count;
1360 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1362 vlc_bool_t b_stop = VLC_FALSE;
1364 while( !b_stop && !bs_eof( s ) )
1366 int i_count = 0, i_color = 0;
1368 i_color = bs_read( s, 8 );
1369 if( i_color != 0x00 )
1376 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1378 if( bs_show( s, 7 ) != 0x00 )
1380 i_count = bs_read( s, 7 );
1390 i_count = bs_read( s, 7 );
1391 i_color = bs_read( s, 8 );
1395 if( !i_count ) continue;
1398 if( ( i_count + *pi_off ) > i_width ) break;
1400 if( i_count == 1 ) p[*pi_off] = i_color;
1401 else memset( ( p + *pi_off ), i_color, i_count );
1403 (*pi_off) += i_count;
1409 static void free_all( decoder_t *p_dec )
1411 decoder_sys_t *p_sys = p_dec->p_sys;
1412 dvbsub_region_t *p_reg, *p_reg_next;
1413 dvbsub_clut_t *p_clut, *p_clut_next;
1415 free( p_sys->p_display );
1417 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1419 p_clut_next = p_clut->p_next;
1422 p_sys->p_cluts = NULL;
1424 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1428 p_reg_next = p_reg->p_next;
1429 for( i = 0; i < p_reg->i_object_defs; i++ )
1430 free( p_reg->p_object_defs[i].psz_text );
1431 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1432 free( p_reg->p_pixbuf );
1435 p_sys->p_regions = NULL;
1439 if( p_sys->p_page->i_region_defs )
1440 free( p_sys->p_page->p_region_defs );
1441 free( p_sys->p_page );
1443 p_sys->p_page = NULL;
1446 static subpicture_t *render( decoder_t *p_dec )
1448 decoder_sys_t *p_sys = p_dec->p_sys;
1449 subpicture_t *p_spu;
1450 subpicture_region_t **pp_spu_region;
1451 int i, j, i_timeout = 0;
1453 /* Allocate the subpicture internal data. */
1454 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1455 if( !p_spu ) return NULL;
1457 pp_spu_region = &p_spu->p_region;
1459 /* Loop on region definitions */
1462 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1465 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1467 dvbsub_region_t *p_region;
1468 dvbsub_regiondef_t *p_regiondef;
1469 dvbsub_clut_t *p_clut;
1470 dvbsub_color_t *p_color;
1471 subpicture_region_t *p_spu_region;
1472 uint8_t *p_src, *p_dst;
1476 i_timeout = p_sys->p_page->i_timeout;
1478 p_regiondef = &p_sys->p_page->p_region_defs[i];
1481 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1482 p_regiondef->i_x, p_regiondef->i_y );
1485 /* Find associated region */
1486 for( p_region = p_sys->p_regions; p_region != NULL;
1487 p_region = p_region->p_next )
1489 if( p_regiondef->i_id == p_region->i_id ) break;
1494 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1498 /* Find associated CLUT */
1499 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1501 if( p_region->i_clut == p_clut->i_id ) break;
1505 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1509 /* FIXME: don't create a subpicture region with VLC_FOURCC YUVP
1510 * when it actually is a TEXT region */
1512 /* Create new SPU region */
1513 memset( &fmt, 0, sizeof(video_format_t) );
1514 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1515 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1516 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1517 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1518 fmt.i_x_offset = fmt.i_y_offset = 0;
1519 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1522 msg_Err( p_dec, "cannot allocate SPU region" );
1525 p_spu_region->i_x = p_regiondef->i_x;
1526 p_spu_region->i_y = p_regiondef->i_y;
1527 p_spu_region->i_align = p_sys->i_spu_position;
1528 *pp_spu_region = p_spu_region;
1529 pp_spu_region = &p_spu_region->p_next;
1532 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1533 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1534 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1535 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1536 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1538 fmt.p_palette->palette[j][0] = p_color[j].Y;
1539 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1540 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1541 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1544 p_src = p_region->p_pixbuf;
1545 p_dst = p_spu_region->picture.Y_PIXELS;
1546 i_pitch = p_spu_region->picture.Y_PITCH;
1548 /* Copy pixel buffer */
1549 for( j = 0; j < p_region->i_height; j++ )
1551 memcpy( p_dst, p_src, p_region->i_width );
1552 p_src += p_region->i_width;
1556 /* Check subtitles encoded as strings of characters
1557 * (since there are not rendered in the pixbuffer) */
1558 for( j = 0; j < p_region->i_object_defs; j++ )
1560 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1562 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1565 /* Create new SPU region */
1566 memset( &fmt, 0, sizeof(video_format_t) );
1567 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
1568 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1569 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1570 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1571 fmt.i_x_offset = fmt.i_y_offset = 0;
1572 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1575 msg_Err( p_dec, "cannot allocate SPU region" );
1579 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1580 p_spu_region->i_x = p_regiondef->i_x + p_object_def->i_x;
1581 p_spu_region->i_y = p_regiondef->i_y + p_object_def->i_y;
1582 p_spu_region->i_align = p_sys->i_spu_position;
1583 *pp_spu_region = p_spu_region;
1584 pp_spu_region = &p_spu_region->p_next;
1588 /* Set the pf_render callback */
1589 p_spu->i_start = (mtime_t) p_sys->i_pts;
1590 //p_spu->i_stop = (mtime_t) 0;
1591 p_spu->b_ephemer = VLC_TRUE;
1592 p_spu->b_pausable = VLC_TRUE;
1593 //p_spu->b_fade = VLC_TRUE;
1594 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1596 /* Correct positioning of SPU */
1597 p_spu->b_absolute = p_sys->b_absolute;
1598 p_spu->i_flags = p_sys->i_spu_position;
1599 p_spu->i_x = p_sys->i_spu_x;
1600 p_spu->i_y = p_sys->i_spu_y;
1601 p_spu->i_original_picture_width = 720;
1602 p_spu->i_original_picture_height = 576;
1604 if( p_sys->p_display )
1606 p_spu->i_original_picture_width = p_sys->p_display->i_width;
1607 p_spu->i_original_picture_height = p_sys->p_display->i_height;
1609 if( p_sys->p_display->b_windowed )
1611 /* TODO: check that this actually works */
1612 p_spu->i_original_picture_width = p_sys->p_display->i_max_x - p_sys->p_display->i_x;
1613 p_spu->i_original_picture_height = p_sys->p_display->i_max_y - p_sys->p_display->i_y;
1614 p_spu->i_x += p_sys->p_display->i_x;
1615 p_spu->i_y += p_sys->p_display->i_y;
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_FOURCC('d','v','b','s') ) &&
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 msg_Err( p_enc, "out of memory" );
1674 p_enc->p_sys = p_sys;
1676 p_enc->pf_encode_sub = Encode;
1677 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1678 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1680 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1682 p_sys->i_page_ver = 0;
1683 p_sys->i_region_ver = 0;
1684 p_sys->i_clut_ver = 0;
1685 p_sys->i_regions = 0;
1686 p_sys->p_regions = 0;
1688 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1689 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1690 p_sys->i_offset_x = val.i_int;
1691 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1692 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1693 p_sys->i_offset_y = val.i_int;
1698 /* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
1699 * into VLC_FOURCC('Y','U','V','P')
1701 static subpicture_t *YuvaYuvp( subpicture_t *p_subpic )
1703 subpicture_region_t *p_region = NULL;
1705 if( !p_subpic ) return NULL;
1707 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1709 video_format_t *p_fmt = &p_region->fmt;
1710 int i = 0, j = 0, n = 0, p = 0;
1711 int i_max_entries = 256;
1713 #ifdef RANDOM_DITHERING
1714 int i_seed = 0xdeadbeef; /* random seed */
1718 int i_pixels = p_region->picture.p[0].i_visible_lines
1719 * p_region->picture.p[0].i_pitch;
1720 int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
1721 * p_region->picture.p[0].i_pitch
1722 + p_region->picture.p[0].i_pitch * 1 / 3;
1723 int i_tolerance = 0;
1726 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1728 p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
1729 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1730 if( !p_fmt->p_palette ) break;
1731 p_fmt->p_palette->i_entries = 0;
1733 /* Find best iterator using Euclide’s algorithm */
1734 for( ; i_iterator > 1 ; i_iterator-- )
1753 /* Count colors, build best palette */
1754 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1756 vlc_bool_t b_success = VLC_TRUE;
1757 p_fmt->p_palette->i_entries = 0;
1759 for( i = 0; i < i_pixels ; )
1762 y = p_region->picture.p[0].p_pixels[i];
1763 u = p_region->picture.p[1].p_pixels[i];
1764 v = p_region->picture.p[2].p_pixels[i];
1765 a = p_region->picture.p[3].p_pixels[i];
1766 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1768 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1769 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1770 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1771 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1776 if( j == p_fmt->p_palette->i_entries )
1778 p_fmt->p_palette->palette[j][0] = y;
1779 p_fmt->p_palette->palette[j][1] = u;
1780 p_fmt->p_palette->palette[j][2] = v;
1781 p_fmt->p_palette->palette[j][3] = a;
1782 p_fmt->p_palette->i_entries++;
1784 if( p_fmt->p_palette->i_entries >= i_max_entries )
1786 b_success = VLC_FALSE;
1803 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1806 #ifndef RANDOM_DITHERING
1807 pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
1808 * sizeof(int) * 4 );
1809 for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
1815 /* Fill image with our new colours */
1816 for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
1818 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1820 for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
1822 int i_offset = p * p_region->picture.p[0].i_pitch + n;
1824 int i_mindist, i_best;
1826 y = (int)p_region->picture.p[0].p_pixels[i_offset];
1827 u = (int)p_region->picture.p[1].p_pixels[i_offset];
1828 v = (int)p_region->picture.p[2].p_pixels[i_offset];
1829 a = (int)p_region->picture.p[3].p_pixels[i_offset];
1831 /* Add dithering compensation */
1832 #ifdef RANDOM_DITHERING
1833 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1834 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1835 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1836 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1838 y += i_ydelta + pi_delta[ n * 4 ];
1839 u += i_udelta + pi_delta[ n * 4 + 1 ];
1840 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1841 a += i_adelta + pi_delta[ n * 4 + 3 ];
1844 /* Find best colour in palette */
1845 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1849 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1850 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1851 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1852 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1854 if( i_dist < i_mindist )
1861 /* Set pixel to best color */
1862 p_region->picture.p[0].p_pixels[i_offset] = i_best;
1864 /* Update dithering state */
1865 #ifdef RANDOM_DITHERING
1866 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1868 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1869 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1870 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1871 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1872 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1873 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1874 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1875 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1876 i_ydelta = i_ydelta * 5 / 8;
1877 i_udelta = i_udelta * 5 / 8;
1878 i_vdelta = i_vdelta * 5 / 8;
1879 i_adelta = i_adelta * 5 / 8;
1883 #ifndef RANDOM_DITHERING
1888 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1890 p_fmt->p_palette->palette[i][0] = 0;
1891 p_fmt->p_palette->palette[i][1] = 0;
1892 p_fmt->p_palette->palette[i][2] = 0;
1893 p_fmt->p_palette->palette[i][3] = 0;
1895 p_fmt->p_palette->i_entries = i_max_entries;
1897 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1903 /****************************************************************************
1904 * Encode: the whole thing
1905 ****************************************************************************/
1906 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1908 subpicture_t *p_temp = NULL;
1909 subpicture_region_t *p_region = NULL;
1910 bs_t bits, *s = &bits;
1913 if( !p_subpic || !p_subpic->p_region ) return NULL;
1915 /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
1916 * VLC_FOURCC('Y','U','V','P')
1918 p_region = p_subpic->p_region;
1919 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
1921 p_temp = YuvaYuvp( p_subpic );
1924 msg_Err( p_enc, "no picture in subpicture" );
1927 p_region = p_subpic->p_region;
1931 if( !p_region ) return NULL;
1933 if( ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) &&
1934 ( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) )
1937 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1938 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1939 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1943 if( p_region->fmt.p_palette )
1945 switch( p_region->fmt.p_palette->i_entries )
1953 msg_Err( p_enc, "subpicture palette (%d) not handled",
1954 p_region->fmt.p_palette->i_entries );
1961 msg_Dbg( p_enc, "encoding subpicture" );
1963 p_block = block_New( p_enc, 64000 );
1964 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1966 bs_write( s, 8, 0x20 ); /* Data identifier */
1967 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1969 encode_page_composition( p_enc, s, p_subpic );
1970 encode_region_composition( p_enc, s, p_subpic );
1971 encode_clut( p_enc, s, p_subpic );
1972 encode_object( p_enc, s, p_subpic );
1974 /* End of display */
1975 bs_write( s, 8, 0x0f ); /* Sync byte */
1976 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1977 bs_write( s, 16, 1 ); /* Page id */
1978 bs_write( s, 16, 0 ); /* Segment length */
1980 bs_write( s, 8, 0xff );/* End marker */
1981 p_block->i_buffer = bs_pos( s ) / 8;
1982 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1983 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
1985 block_t *p_block_stop;
1987 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1989 /* Send another (empty) subtitle to signal the end of display */
1990 p_block_stop = block_New( p_enc, 64000 );
1991 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1992 bs_write( s, 8, 0x20 ); /* Data identifier */
1993 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1994 encode_page_composition( p_enc, s, 0 );
1995 bs_write( s, 8, 0x0f ); /* Sync byte */
1996 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1997 bs_write( s, 16, 1 ); /* Page id */
1998 bs_write( s, 16, 0 ); /* Segment length */
1999 bs_write( s, 8, 0xff );/* End marker */
2000 p_block_stop->i_buffer = bs_pos( s ) / 8;
2001 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
2002 block_ChainAppend( &p_block, p_block_stop );
2003 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2006 msg_Dbg( p_enc, "subpicture encoded properly" );
2011 /*****************************************************************************
2012 * CloseEncoder: encoder destruction
2013 *****************************************************************************/
2014 static void CloseEncoder( vlc_object_t *p_this )
2016 encoder_t *p_enc = (encoder_t *)p_this;
2017 encoder_sys_t *p_sys = p_enc->p_sys;
2019 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2020 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2021 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2023 if( p_sys->i_regions ) free( p_sys->p_regions );
2027 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2028 subpicture_t *p_subpic )
2030 encoder_sys_t *p_sys = p_enc->p_sys;
2031 subpicture_region_t *p_region;
2032 vlc_bool_t b_mode_change = VLC_FALSE;
2033 int i_regions, i_timeout;
2035 bs_write( s, 8, 0x0f ); /* Sync byte */
2036 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2037 bs_write( s, 16, 1 ); /* Page id */
2039 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2040 p_region; p_region = p_region->p_next, i_regions++ )
2042 if( i_regions >= p_sys->i_regions )
2044 encoder_region_t region;
2045 region.i_width = region.i_height = 0;
2047 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2048 (p_sys->i_regions + 1) );
2049 p_sys->p_regions[p_sys->i_regions++] = region;
2052 if( ( p_sys->p_regions[i_regions].i_width <
2053 (int)p_region->fmt.i_visible_width ) ||
2054 ( p_sys->p_regions[i_regions].i_width >
2055 (int)p_region->fmt.i_visible_width ) )
2057 b_mode_change = VLC_TRUE;
2058 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2059 i_regions, p_sys->p_regions[i_regions].i_width,
2060 p_region->fmt.i_visible_width );
2061 p_sys->p_regions[i_regions].i_width =
2062 p_region->fmt.i_visible_width;
2064 if( p_sys->p_regions[i_regions].i_height <
2065 (int)p_region->fmt.i_visible_height )
2067 b_mode_change = VLC_TRUE;
2068 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2069 i_regions, p_sys->p_regions[i_regions].i_height,
2070 p_region->fmt.i_visible_height );
2071 p_sys->p_regions[i_regions].i_height =
2072 p_region->fmt.i_visible_height;
2076 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2079 if( p_subpic && !p_subpic->b_ephemer &&
2080 ( p_subpic->i_stop > p_subpic->i_start ) )
2082 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2085 bs_write( s, 8, i_timeout ); /* Timeout */
2086 bs_write( s, 4, p_sys->i_page_ver++ );
2087 bs_write( s, 2, b_mode_change ?
2088 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2089 bs_write( s, 2, 0 ); /* Reserved */
2091 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2092 p_region; p_region = p_region->p_next, i_regions++ )
2094 bs_write( s, 8, i_regions );
2095 bs_write( s, 8, 0 ); /* Reserved */
2096 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2098 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2099 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2103 bs_write( s, 16, p_subpic->i_x + p_region->i_x );
2104 bs_write( s, 16, p_subpic->i_y + p_region->i_y );
2109 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2111 encoder_sys_t *p_sys = p_enc->p_sys;
2112 subpicture_region_t *p_region = p_subpic->p_region;
2113 video_palette_t *p_pal, pal;
2117 if( !p_region ) return;
2119 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
2121 p_pal = p_region->fmt.p_palette;
2126 for( i = 0; i < 4; i++ )
2128 pal.palette[i][0] = 0;
2129 pal.palette[i][1] = 0;
2130 pal.palette[i][2] = 0;
2131 pal.palette[i][3] = 0;
2136 bs_write( s, 8, 0x0f ); /* Sync byte */
2137 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2138 bs_write( s, 16, 1 ); /* Page id */
2140 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2141 bs_write( s, 8, 1 ); /* Clut id */
2142 bs_write( s, 4, p_sys->i_clut_ver++ );
2143 bs_write( s, 4, 0 ); /* Reserved */
2145 for( i = 0; i < p_pal->i_entries; i++ )
2147 bs_write( s, 8, i ); /* Clut entry id */
2148 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2149 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2150 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2151 bs_write( s, 4, 0 ); /* Reserved */
2152 bs_write( s, 1, 1 ); /* Full range flag */
2153 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2154 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2155 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2156 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2157 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2161 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2162 subpicture_t *p_subpic )
2164 encoder_sys_t *p_sys = p_enc->p_sys;
2165 subpicture_region_t *p_region;
2168 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2169 p_region = p_region->p_next, i_region++ )
2171 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2173 ( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') );
2177 video_palette_t *p_pal = p_region->fmt.p_palette;
2181 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2185 i_entries = p_pal->i_entries;
2186 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2188 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2190 if( !p_pal->palette[i_bg][3] ) break;
2194 bs_write( s, 8, 0x0f ); /* Sync byte */
2195 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2196 bs_write( s, 16, 1 ); /* Page id */
2198 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2199 bs_write( s, 8, i_region );
2200 bs_write( s, 4, p_sys->i_region_ver++ );
2202 /* Region attributes */
2203 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2204 bs_write( s, 3, 0 ); /* Reserved */
2205 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2206 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2207 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2208 bs_write( s, 3, i_depth ); /* Region depth */
2209 bs_write( s, 2, 0 ); /* Reserved */
2210 bs_write( s, 8, 1 ); /* Clut id */
2211 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2212 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2213 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2214 bs_write( s, 2, 0 ); /* Reserved */
2216 /* In our implementation we only have 1 object per region */
2217 bs_write( s, 16, i_region );
2218 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2219 bs_write( s, 2, 0 ); /* object provider flag */
2220 bs_write( s, 12, 0 );/* object horizontal position */
2221 bs_write( s, 4, 0 ); /* Reserved */
2222 bs_write( s, 12, 0 );/* object vertical position */
2226 bs_write( s, 8, 1 ); /* foreground pixel code */
2227 bs_write( s, 8, 0 ); /* background pixel code */
2232 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2233 subpicture_region_t *p_region,
2236 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2238 encoder_sys_t *p_sys = p_enc->p_sys;
2239 subpicture_region_t *p_region;
2242 int i_length_pos, i_update_pos, i_pixel_data_pos;
2244 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2245 p_region = p_region->p_next, i_region++ )
2247 bs_write( s, 8, 0x0f ); /* Sync byte */
2248 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2249 bs_write( s, 16, 1 ); /* Page id */
2251 i_length_pos = bs_pos( s );
2252 bs_write( s, 16, 0 ); /* Segment length */
2253 bs_write( s, 16, i_region ); /* Object id */
2254 bs_write( s, 4, p_sys->i_region_ver++ );
2256 /* object coding method */
2257 switch( p_region->fmt.i_chroma )
2259 case VLC_FOURCC( 'Y','U','V','P' ):
2260 bs_write( s, 2, 0 );
2262 case VLC_FOURCC( 'T','E','X','T' ):
2263 bs_write( s, 2, 1 );
2266 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2270 bs_write( s, 1, 0 ); /* non modifying color flag */
2271 bs_write( s, 1, 0 ); /* Reserved */
2273 if( p_region->fmt.i_chroma == VLC_FOURCC( 'T','E','X','T' ) )
2277 if( !p_region->psz_text ) continue;
2279 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2281 bs_write( s, 8, i_size ); /* number of characters in string */
2282 for( i = 0; i < i_size; i++ )
2284 bs_write( s, 16, p_region->psz_text[i] );
2287 /* Update segment length */
2288 SetWBE( &s->p_start[i_length_pos/8],
2289 (bs_pos(s) - i_length_pos)/8 -2 );
2293 /* Coding of a bitmap object */
2294 i_update_pos = bs_pos( s );
2295 bs_write( s, 16, 0 ); /* topfield data block length */
2296 bs_write( s, 16, 0 ); /* bottomfield data block length */
2299 i_pixel_data_pos = bs_pos( s );
2300 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
2301 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2302 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2305 i_pixel_data_pos = bs_pos( s );
2306 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
2307 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2308 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2310 /* Stuffing for word alignment */
2312 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2314 /* Update segment length */
2315 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2319 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2321 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2323 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2325 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2326 subpicture_region_t *p_region,
2329 unsigned int i_line;
2332 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
2334 /* Encode line by line */
2335 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2338 switch( p_region->fmt.p_palette->i_entries )
2344 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2345 encode_pixel_line_2bp( s, p_region, i_line );
2349 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2350 encode_pixel_line_4bp( s, p_region, i_line );
2354 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2355 encode_pixel_line_8bp( s, p_region, i_line );
2359 msg_Err( p_enc, "subpicture palette (%i) not handled",
2360 p_region->fmt.p_palette->i_entries );
2364 bs_write( s, 8, 0xf0 ); /* End of object line code */
2368 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2371 unsigned int i, i_length = 0;
2372 int i_pitch = p_region->picture.p->i_pitch;
2373 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2374 int i_last_pixel = p_data[0];
2376 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2378 if( ( i != p_region->fmt.i_visible_width ) &&
2379 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2385 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2387 /* 2bit/pixel code */
2389 bs_write( s, 2, i_last_pixel );
2392 bs_write( s, 2, 0 );
2393 bs_write( s, 1, 0 );
2394 bs_write( s, 1, 1 ); /* pseudo color 0 */
2403 bs_write( s, 2, i_last_pixel );
2404 bs_write( s, 2, i_last_pixel );
2408 bs_write( s, 2, 0 );
2409 bs_write( s, 1, 0 );
2410 bs_write( s, 1, 0 );
2411 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2414 else if( i_length > 2 )
2416 bs_write( s, 2, 0 );
2417 if( i_length <= 10 )
2419 bs_write( s, 1, 1 );
2420 bs_write( s, 3, i_length - 3 );
2421 bs_write( s, 2, i_last_pixel );
2425 bs_write( s, 1, 0 );
2426 bs_write( s, 1, 0 );
2428 if( i_length <= 27 )
2430 bs_write( s, 2, 2 );
2431 bs_write( s, 4, i_length - 12 );
2432 bs_write( s, 2, i_last_pixel );
2436 bs_write( s, 2, 3 );
2437 bs_write( s, 8, i_length - 29 );
2438 bs_write( s, 2, i_last_pixel );
2443 if( i == p_region->fmt.i_visible_width ) break;
2445 i_last_pixel = p_data[i];
2450 bs_write( s, 2, 0 );
2451 bs_write( s, 1, 0 );
2452 bs_write( s, 1, 0 );
2453 bs_write( s, 2, 0 );
2459 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2462 unsigned int i, i_length = 0;
2463 int i_pitch = p_region->picture.p->i_pitch;
2464 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2465 int i_last_pixel = p_data[0];
2467 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2469 if( i != p_region->fmt.i_visible_width &&
2470 p_data[i] == i_last_pixel && i_length != 280 )
2476 if( ( i_length == 1 ) ||
2477 ( ( i_length == 3 ) && i_last_pixel ) ||
2480 /* 4bit/pixel code */
2482 bs_write( s, 4, i_last_pixel );
2485 bs_write( s, 4, 0 );
2486 bs_write( s, 1, 1 );
2487 bs_write( s, 1, 1 );
2488 bs_write( s, 2, 0 ); /* pseudo color 0 */
2497 bs_write( s, 4, i_last_pixel );
2498 bs_write( s, 4, i_last_pixel );
2502 bs_write( s, 4, 0 );
2503 bs_write( s, 1, 1 );
2504 bs_write( s, 1, 1 );
2505 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2508 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2510 bs_write( s, 4, 0 );
2511 bs_write( s, 1, 0 );
2512 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2514 else if( i_length > 2 )
2516 bs_write( s, 4, 0 );
2517 bs_write( s, 1, 1 );
2521 bs_write( s, 1, 0 );
2522 bs_write( s, 2, i_length - 4 );
2523 bs_write( s, 4, i_last_pixel );
2527 bs_write( s, 1, 1 );
2529 if( i_length <= 24 )
2531 bs_write( s, 2, 2 );
2532 bs_write( s, 4, i_length - 9 );
2533 bs_write( s, 4, i_last_pixel );
2537 bs_write( s, 2, 3 );
2538 bs_write( s, 8, i_length - 25 );
2539 bs_write( s, 4, i_last_pixel );
2544 if( i == p_region->fmt.i_visible_width ) break;
2546 i_last_pixel = p_data[i];
2551 bs_write( s, 8, 0 );
2557 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2560 unsigned int i, i_length = 0;
2561 int i_pitch = p_region->picture.p->i_pitch;
2562 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2563 int i_last_pixel = p_data[0];
2565 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2567 if( ( i != p_region->fmt.i_visible_width ) &&
2568 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2574 if( ( i_length == 1 ) && i_last_pixel )
2576 /* 8bit/pixel code */
2577 bs_write( s, 8, i_last_pixel );
2579 else if( ( i_length == 2 ) && i_last_pixel )
2581 /* 8bit/pixel code */
2582 bs_write( s, 8, i_last_pixel );
2583 bs_write( s, 8, i_last_pixel );
2585 else if( i_length <= 127 )
2587 bs_write( s, 8, 0 );
2591 bs_write( s, 1, 0 );
2592 bs_write( s, 7, i_length ); /* pseudo color 0 */
2596 bs_write( s, 1, 1 );
2597 bs_write( s, 7, i_length );
2598 bs_write( s, 8, i_last_pixel );
2602 if( i == p_region->fmt.i_visible_width ) break;
2604 i_last_pixel = p_data[i];
2609 bs_write( s, 8, 0 );
2610 bs_write( s, 8, 0 );