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>
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 const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
73 static const char *const 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( N_("DVB subtitles decoder") )
91 set_shortname( N_("DVB subtitles") )
92 set_capability( "decoder", 50 )
93 set_category( CAT_INPUT )
94 set_subcategory( SUBCAT_INPUT_SCODEC )
95 set_callbacks( Open, Close )
97 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, true )
98 change_integer_list( pi_pos_values, ppsz_pos_descriptions, NULL )
99 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, false )
100 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, false )
102 # define ENC_CFG_PREFIX "sout-dvbsub-"
104 set_description( N_("DVB subtitles encoder") )
105 set_capability( "encoder", 100 )
106 set_callbacks( OpenEncoder, CloseEncoder )
108 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, false )
109 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, false )
110 add_obsolete_integer( ENC_CFG_PREFIX "timeout" ) /* Suppressed since 0.8.5 */
113 static const char *const ppsz_enc_options[] = { "x", "y", NULL };
115 /****************************************************************************
117 ****************************************************************************
118 * Those structures refer closely to the ETSI 300 743 Object model
119 ****************************************************************************/
121 /* The object definition gives the position of the object in a region [7.2.5] */
122 typedef struct dvbsub_objectdef_s
130 char *psz_text; /* for string of characters objects */
132 } dvbsub_objectdef_t;
134 /* The entry in the palette CLUT */
144 /* The displays dimensions [7.2.1] */
145 typedef struct dvbsub_display_s
162 typedef struct dvbsub_clut_s
166 dvbsub_color_t c_2b[4];
167 dvbsub_color_t c_4b[16];
168 dvbsub_color_t c_8b[256];
170 struct dvbsub_clut_s *p_next;
174 /* The Region is an aera on the image [7.2.3]
175 * with a list of the object definitions associated and a CLUT */
176 typedef struct dvbsub_region_s
191 dvbsub_objectdef_t *p_object_defs;
193 struct dvbsub_region_s *p_next;
197 /* The object definition gives the position of the object in a region */
198 typedef struct dvbsub_regiondef_s
204 } dvbsub_regiondef_t;
206 /* The page defines the list of regions [7.2.2] */
210 int i_timeout; /* in seconds */
215 dvbsub_regiondef_t *p_region_defs;
223 /* Decoder internal data */
234 dvbsub_page_t *p_page;
235 dvbsub_region_t *p_regions;
236 dvbsub_clut_t *p_cluts;
237 dvbsub_display_t *p_display;
238 dvbsub_clut_t default_clut;
242 /* List of different SEGMENT TYPES */
243 /* According to EN 300-743, table 2 */
244 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
245 #define DVBSUB_ST_REGION_COMPOSITION 0x11
246 #define DVBSUB_ST_CLUT_DEFINITION 0x12
247 #define DVBSUB_ST_OBJECT_DATA 0x13
248 #define DVBSUB_ST_DISPLAY_DEFINITION 0x14
249 #define DVBSUB_ST_ENDOFDISPLAY 0x80
250 #define DVBSUB_ST_STUFFING 0xff
251 /* List of different OBJECT TYPES */
252 /* According to EN 300-743, table 6 */
253 #define DVBSUB_OT_BASIC_BITMAP 0x00
254 #define DVBSUB_OT_BASIC_CHAR 0x01
255 #define DVBSUB_OT_COMPOSITE_STRING 0x02
256 /* Pixel DATA TYPES */
257 /* According to EN 300-743, table 9 */
258 #define DVBSUB_DT_2BP_CODE_STRING 0x10
259 #define DVBSUB_DT_4BP_CODE_STRING 0x11
260 #define DVBSUB_DT_8BP_CODE_STRING 0x12
261 #define DVBSUB_DT_24_TABLE_DATA 0x20
262 #define DVBSUB_DT_28_TABLE_DATA 0x21
263 #define DVBSUB_DT_48_TABLE_DATA 0x22
264 #define DVBSUB_DT_END_LINE 0xf0
265 /* List of different Page Composition Segment state */
266 /* According to EN 300-743, 7.2.1 table 3 */
267 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
268 #define DVBSUB_PCS_STATE_CHANGE 0x02
270 /*****************************************************************************
272 *****************************************************************************/
273 static void decode_segment( decoder_t *, bs_t * );
274 static void decode_page_composition( decoder_t *, bs_t * );
275 static void decode_region_composition( decoder_t *, bs_t * );
276 static void decode_object( decoder_t *, bs_t * );
277 static void decode_display_definition( decoder_t *, bs_t * );
278 static void decode_clut( decoder_t *, bs_t * );
279 static void free_all( decoder_t * );
281 static void default_clut_init( decoder_t * );
283 static subpicture_t *render( decoder_t * );
285 /*****************************************************************************
286 * Open: probe the decoder and return score
287 *****************************************************************************
288 * Tries to launch a decoder and return score so that the interface is able
290 *****************************************************************************/
291 static int Open( vlc_object_t *p_this )
293 decoder_t *p_dec = (decoder_t *) p_this;
294 decoder_sys_t *p_sys;
298 if( p_dec->fmt_in.i_codec != VLC_CODEC_DVBS )
303 p_dec->pf_decode_sub = Decode;
304 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
307 memset( p_sys, 0, sizeof(decoder_sys_t) );
309 p_sys->i_pts = (mtime_t) 0;
310 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
311 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
313 p_sys->p_regions = NULL;
314 p_sys->p_cluts = NULL;
315 p_sys->p_page = NULL;
316 p_sys->p_display = NULL;
318 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
319 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
320 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
321 p_sys->i_spu_position = val.i_int;
322 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
323 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
324 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
326 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
327 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
328 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
331 /* Check if subpicture position was overridden */
332 p_sys->b_absolute = true;
333 p_sys->i_spu_x = p_sys->i_spu_y = 0;
335 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
337 p_sys->b_absolute = true;
338 p_sys->i_spu_x = i_posx;
339 p_sys->i_spu_y = i_posy;
342 p_dec->fmt_out.i_cat = SPU_ES;
343 p_dec->fmt_out.i_codec = 0;
345 default_clut_init( p_dec );
350 /*****************************************************************************
352 *****************************************************************************/
353 static void Close( vlc_object_t *p_this )
355 decoder_t *p_dec = (decoder_t*) p_this;
356 decoder_sys_t *p_sys = p_dec->p_sys;
358 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
359 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
360 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
366 /*****************************************************************************
368 *****************************************************************************/
369 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
371 decoder_sys_t *p_sys = p_dec->p_sys;
373 subpicture_t *p_spu = NULL;
375 if( ( pp_block == NULL ) || ( *pp_block == NULL ) ) return NULL;
379 p_sys->i_pts = p_block->i_pts;
380 if( p_sys->i_pts <= 0 )
383 /* Some DVB channels send stuffing segments in non-dated packets so
384 * don't complain too loudly. */
385 msg_Warn( p_dec, "non dated subtitle" );
387 block_Release( p_block );
391 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
393 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
395 msg_Dbg( p_dec, "invalid data identifier" );
396 block_Release( p_block );
400 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
402 msg_Dbg( p_dec, "invalid subtitle stream id" );
403 block_Release( p_block );
408 msg_Dbg( p_dec, "subtitle packet received: %"PRId64, p_sys->i_pts );
411 p_sys->b_page = false;
412 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
414 decode_segment( p_dec, &p_sys->bs );
417 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
419 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
420 block_Release( p_block );
424 /* Check if the page is to be displayed */
425 if( p_sys->p_page && p_sys->b_page )
426 p_spu = render( p_dec );
428 block_Release( p_block );
433 /* following functions are local */
435 /*****************************************************************************
436 * default_clut_init: default clut as defined in EN 300-743 section 10
437 *****************************************************************************/
438 static void default_clut_init( decoder_t *p_dec )
440 decoder_sys_t *p_sys = p_dec->p_sys;
443 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
444 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
445 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
448 for( i = 0; i < 4; i++ )
450 uint8_t R = 0, G = 0, B = 0, T = 0;
452 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
453 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
454 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
455 else R = G = B = 0x7F;
457 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
458 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
459 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
460 p_sys->default_clut.c_2b[i].T = T;
463 /* 16 entries CLUT */
464 for( i = 0; i < 16; i++ )
466 uint8_t R = 0, G = 0, B = 0, T = 0;
470 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
476 R = (i & 0x1) ? 0xFF : 0;
477 G = (i & 0x2) ? 0xFF : 0;
478 B = (i & 0x4) ? 0xFF : 0;
483 R = (i & 0x1) ? 0x7F : 0;
484 G = (i & 0x2) ? 0x7F : 0;
485 B = (i & 0x4) ? 0x7F : 0;
488 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
489 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
490 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
491 p_sys->default_clut.c_4b[i].T = T;
494 /* 256 entries CLUT */
495 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
498 static void decode_segment( decoder_t *p_dec, bs_t *s )
500 decoder_sys_t *p_sys = p_dec->p_sys;
505 /* sync_byte (already checked) */
509 i_type = bs_read( s, 8 );
512 i_page_id = bs_read( s, 16 );
515 i_size = bs_show( s, 16 );
517 if( ( i_page_id != p_sys->i_id ) &&
518 ( i_page_id != p_sys->i_ancillary_id ) )
521 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
522 i_page_id, p_sys->i_id );
524 bs_skip( s, 8 * ( 2 + i_size ) );
528 if( ( p_sys->i_ancillary_id != p_sys->i_id ) &&
529 ( i_type == DVBSUB_ST_PAGE_COMPOSITION ) &&
530 ( i_page_id == p_sys->i_ancillary_id ) )
533 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
535 bs_skip( s, 8 * ( 2 + i_size ) );
540 if( i_page_id == p_sys->i_id )
541 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
543 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
548 case DVBSUB_ST_PAGE_COMPOSITION:
550 msg_Dbg( p_dec, "decode_page_composition" );
552 decode_page_composition( p_dec, s );
555 case DVBSUB_ST_REGION_COMPOSITION:
557 msg_Dbg( p_dec, "decode_region_composition" );
559 decode_region_composition( p_dec, s );
562 case DVBSUB_ST_CLUT_DEFINITION:
564 msg_Dbg( p_dec, "decode_clut" );
566 decode_clut( p_dec, s );
569 case DVBSUB_ST_OBJECT_DATA:
571 msg_Dbg( p_dec, "decode_object" );
573 decode_object( p_dec, s );
576 case DVBSUB_ST_DISPLAY_DEFINITION:
578 msg_Dbg( p_dec, "decode_display_definition" );
580 decode_display_definition( p_dec, s );
583 case DVBSUB_ST_ENDOFDISPLAY:
585 msg_Dbg( p_dec, "end of display" );
587 bs_skip( s, 8 * ( 2 + i_size ) );
590 case DVBSUB_ST_STUFFING:
592 msg_Dbg( p_dec, "skip stuffing" );
594 bs_skip( s, 8 * ( 2 + i_size ) );
598 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
599 bs_skip( s, 8 * ( 2 + i_size ) );
604 static void decode_clut( decoder_t *p_dec, bs_t *s )
606 decoder_sys_t *p_sys = p_dec->p_sys;
607 uint16_t i_segment_length;
608 uint16_t i_processed_length;
609 dvbsub_clut_t *p_clut, *p_next;
612 i_segment_length = bs_read( s, 16 );
613 i_id = bs_read( s, 8 );
614 i_version = bs_read( s, 4 );
616 /* Check if we already have this clut */
617 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
619 if( p_clut->i_id == i_id ) break;
622 /* Check version number */
623 if( p_clut && ( p_clut->i_version == i_version ) )
626 bs_skip( s, 8 * i_segment_length - 12 );
633 msg_Dbg( p_dec, "new clut: %i", i_id );
635 p_clut = malloc( sizeof( dvbsub_clut_t ) );
638 p_clut->p_next = p_sys->p_cluts;
639 p_sys->p_cluts = p_clut;
642 /* Initialize to default clut */
643 p_next = p_clut->p_next;
644 *p_clut = p_sys->default_clut;
645 p_clut->p_next = p_next;
647 /* We don't have this version of the CLUT: Parse it */
648 p_clut->i_version = i_version;
650 bs_skip( s, 4 ); /* Reserved bits */
651 i_processed_length = 2;
652 while( i_processed_length < i_segment_length )
654 uint8_t y, cb, cr, t;
658 i_id = bs_read( s, 8 );
659 i_type = bs_read( s, 3 );
663 if( bs_read( s, 1 ) )
666 cr = bs_read( s, 8 );
667 cb = bs_read( s, 8 );
669 i_processed_length += 6;
673 y = bs_read( s, 6 ) << 2;
674 cr = bs_read( s, 4 ) << 4;
675 cb = bs_read( s, 4 ) << 4;
676 t = bs_read( s, 2 ) << 6;
677 i_processed_length += 4;
680 /* We are not entirely compliant here as full transparency is indicated
681 * with a luma value of zero, not a transparency value of 0xff
682 * (full transparency would actually be 0xff + 1). */
689 /* According to EN 300-743 section 7.2.3 note 1, type should
690 * not have more than 1 bit set to one, but some streams don't
691 * respect this note. */
692 if( ( i_type & 0x04 ) && ( i_id < 4 ) )
694 p_clut->c_2b[i_id].Y = y;
695 p_clut->c_2b[i_id].Cr = cr;
696 p_clut->c_2b[i_id].Cb = cb;
697 p_clut->c_2b[i_id].T = t;
699 if( ( i_type & 0x02 ) && ( i_id < 16 ) )
701 p_clut->c_4b[i_id].Y = y;
702 p_clut->c_4b[i_id].Cr = cr;
703 p_clut->c_4b[i_id].Cb = cb;
704 p_clut->c_4b[i_id].T = t;
708 p_clut->c_8b[i_id].Y = y;
709 p_clut->c_8b[i_id].Cr = cr;
710 p_clut->c_8b[i_id].Cb = cb;
711 p_clut->c_8b[i_id].T = t;
716 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
718 decoder_sys_t *p_sys = p_dec->p_sys;
719 int i_version, i_state, i_segment_length, i_timeout, i;
721 /* A page is composed by 0 or more region */
722 i_segment_length = bs_read( s, 16 );
723 i_timeout = bs_read( s, 8 );
724 i_version = bs_read( s, 4 );
725 i_state = bs_read( s, 2 );
726 bs_skip( s, 2 ); /* Reserved */
728 if( i_state == DVBSUB_PCS_STATE_CHANGE )
730 /* End of an epoch, reset decoder buffer */
732 msg_Dbg( p_dec, "page composition mode change" );
736 else if( !p_sys->p_page && ( i_state != DVBSUB_PCS_STATE_ACQUISITION ) &&
737 ( i_state != DVBSUB_PCS_STATE_CHANGE ) )
739 /* Not a full PCS, we need to wait for one */
740 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
743 /* Try to start decoding even without an acquisition page */
744 bs_skip( s, 8 * (i_segment_length - 2) );
750 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
751 msg_Dbg( p_dec, "acquisition page composition" );
754 /* Check version number */
755 if( p_sys->p_page && ( p_sys->p_page->i_version == i_version ) )
757 bs_skip( s, 8 * (i_segment_length - 2) );
760 else if( p_sys->p_page )
762 if( p_sys->p_page->i_region_defs )
763 free( p_sys->p_page->p_region_defs );
764 p_sys->p_page->p_region_defs = NULL;
765 p_sys->p_page->i_region_defs = 0;
771 msg_Dbg( p_dec, "new page" );
773 /* Allocate a new page */
774 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
779 p_sys->p_page->i_version = i_version;
780 p_sys->p_page->i_timeout = i_timeout;
781 p_sys->b_page = true;
783 /* Number of regions */
784 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
786 if( p_sys->p_page->i_region_defs == 0 ) return;
788 p_sys->p_page->p_region_defs =
789 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
790 if( p_sys->p_page->p_region_defs )
792 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
794 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
795 bs_skip( s, 8 ); /* Reserved */
796 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
797 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
800 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
801 i, p_sys->p_page->p_region_defs[i].i_x,
802 p_sys->p_page->p_region_defs[i].i_y );
808 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
810 decoder_sys_t *p_sys = p_dec->p_sys;
811 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
812 int i_segment_length, i_processed_length, i_id, i_version;
813 int i_width, i_height, i_level_comp, i_depth, i_clut;
814 int i_8_bg, i_4_bg, i_2_bg;
817 i_segment_length = bs_read( s, 16 );
818 i_id = bs_read( s, 8 );
819 i_version = bs_read( s, 4 );
821 /* Check if we already have this region */
822 for( p_region = p_sys->p_regions; p_region != NULL;
823 p_region = p_region->p_next )
825 pp_region = &p_region->p_next;
826 if( p_region->i_id == i_id ) break;
829 /* Check version number */
830 if( p_region && ( p_region->i_version == i_version ) )
832 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
839 msg_Dbg( p_dec, "new region: %i", i_id );
841 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
844 memset( p_region, 0, sizeof(dvbsub_region_t) );
845 p_region->p_object_defs = NULL;
846 p_region->p_pixbuf = NULL;
847 p_region->p_next = NULL;
850 /* Region attributes */
851 p_region->i_id = i_id;
852 p_region->i_version = i_version;
853 b_fill = bs_read( s, 1 );
854 bs_skip( s, 3 ); /* Reserved */
856 i_width = bs_read( s, 16 );
857 i_height = bs_read( s, 16 );
859 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
861 i_level_comp = bs_read( s, 3 );
862 i_depth = bs_read( s, 3 );
863 bs_skip( s, 2 ); /* Reserved */
864 i_clut = bs_read( s, 8 );
866 i_8_bg = bs_read( s, 8 );
867 i_4_bg = bs_read( s, 4 );
868 i_2_bg = bs_read( s, 2 );
869 bs_skip( s, 2 ); /* Reserved */
871 /* Free old object defs */
872 while( p_region->i_object_defs )
873 free( p_region->p_object_defs[--p_region->i_object_defs].psz_text );
875 free( p_region->p_object_defs );
876 p_region->p_object_defs = NULL;
878 /* Extra sanity checks */
879 if( ( p_region->i_width != i_width ) ||
880 ( p_region->i_height != i_height ) )
882 if( p_region->p_pixbuf )
884 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
885 p_region->i_width, p_region->i_height, i_width, i_height );
886 free( p_region->p_pixbuf );
889 p_region->p_pixbuf = malloc( i_height * i_width );
890 p_region->i_depth = 0;
893 if( p_region->i_depth &&
894 ( ( p_region->i_depth != i_depth ) ||
895 ( p_region->i_level_comp != i_level_comp ) ||
896 ( p_region->i_clut != i_clut) ) )
898 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
901 /* Erase background of region */
904 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
905 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
906 memset( p_region->p_pixbuf, i_background, i_width * i_height );
909 p_region->i_width = i_width;
910 p_region->i_height = i_height;
911 p_region->i_level_comp = i_level_comp;
912 p_region->i_depth = i_depth;
913 p_region->i_clut = i_clut;
915 /* List of objects in the region */
916 i_processed_length = 10;
917 while( i_processed_length < i_segment_length )
919 dvbsub_objectdef_t *p_obj;
921 /* We create a new object */
922 p_region->i_object_defs++;
923 p_region->p_object_defs =
924 realloc( p_region->p_object_defs,
925 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
927 /* We parse object properties */
928 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
929 p_obj->i_id = bs_read( s, 16 );
930 p_obj->i_type = bs_read( s, 2 );
931 bs_skip( s, 2 ); /* Provider */
932 p_obj->i_x = bs_read( s, 12 );
933 bs_skip( s, 4 ); /* Reserved */
934 p_obj->i_y = bs_read( s, 12 );
935 p_obj->psz_text = NULL;
937 i_processed_length += 6;
939 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
940 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
942 p_obj->i_fg_pc = bs_read( s, 8 );
943 p_obj->i_bg_pc = bs_read( s, 8 );
944 i_processed_length += 2;
949 /* ETSI 300 743 [7.2.1] */
950 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
952 decoder_sys_t *p_sys = p_dec->p_sys;
953 uint16_t i_segment_length;
954 uint16_t i_processed_length = 40;
955 dvbsub_display_t *p_display;
956 dvbsub_display_t *p_old = p_sys->p_display;
959 i_segment_length = bs_read( s, 16 );
960 i_version = bs_read( s, 4 );
962 /* Check version number */
963 if( p_old && ( p_old->i_version == i_version ) )
965 /* The definition did not change */
966 bs_skip( s, 8*i_segment_length - 4 );
971 msg_Dbg( p_dec, "new display definition: %i", i_version );
973 p_display = malloc( sizeof(dvbsub_display_t) );
976 /* We don't have this version of the display definition: Parse it */
977 p_display->i_version = i_version;
978 p_display->b_windowed = bs_read( s, 1 );
979 bs_skip( s, 3 ); /* Reserved bits */
980 p_display->i_width = bs_read( s, 16 )+1;
981 p_display->i_height = bs_read( s, 16 )+1;
983 if( p_display->b_windowed )
986 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
988 /* Coordinates are measured from the top left corner */
989 p_display->i_x = bs_read( s, 16 );
990 p_display->i_max_x = bs_read( s, 16 );
991 p_display->i_y = bs_read( s, 16 );
992 p_display->i_max_y = bs_read( s, 16 );
993 i_processed_length += 64;
997 p_sys->p_display = p_display;
1000 if( i_processed_length != i_segment_length*8 )
1002 msg_Err( p_dec, "processed length %d != segment length %d",
1003 i_processed_length, i_segment_length );
1007 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1008 p_display->i_version, p_display->i_width, p_display->i_height );
1009 if( p_display->b_windowed )
1010 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1011 p_display->i_x, p_display->i_max_x, p_display->i_y, p_display->i_max_y );
1015 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1017 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1018 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1019 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1021 static void decode_object( decoder_t *p_dec, bs_t *s )
1023 decoder_sys_t *p_sys = p_dec->p_sys;
1024 dvbsub_region_t *p_region;
1025 int i_segment_length, i_coding_method, i_version, i_id, i;
1026 bool b_non_modify_color;
1028 /* ETSI 300-743 paragraph 7.2.4
1029 * sync_byte, segment_type and page_id have already been processed.
1031 i_segment_length = bs_read( s, 16 );
1032 i_id = bs_read( s, 16 );
1033 i_version = bs_read( s, 4 );
1034 i_coding_method = bs_read( s, 2 );
1036 if( i_coding_method > 1 )
1038 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1039 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1043 /* Check if the object needs to be rendered in at least one
1045 for( p_region = p_sys->p_regions; p_region != NULL;
1046 p_region = p_region->p_next )
1048 for( i = 0; i < p_region->i_object_defs; i++ )
1049 if( p_region->p_object_defs[i].i_id == i_id ) break;
1051 if( i != p_region->i_object_defs ) break;
1055 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1060 msg_Dbg( p_dec, "new object: %i", i_id );
1063 b_non_modify_color = bs_read( s, 1 );
1064 bs_skip( s, 1 ); /* Reserved */
1066 if( i_coding_method == 0x00 )
1068 int i_topfield, i_bottomfield;
1069 uint8_t *p_topfield, *p_bottomfield;
1071 i_topfield = bs_read( s, 16 );
1072 i_bottomfield = bs_read( s, 16 );
1073 p_topfield = s->p_start + bs_pos( s ) / 8;
1074 p_bottomfield = p_topfield + i_topfield;
1076 bs_skip( s, 8 * (i_segment_length - 7) );
1079 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1080 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1082 msg_Dbg( p_dec, "corrupted object data" );
1086 for( p_region = p_sys->p_regions; p_region != NULL;
1087 p_region = p_region->p_next )
1089 for( i = 0; i < p_region->i_object_defs; i++ )
1091 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1093 dvbsub_render_pdata( p_dec, p_region,
1094 p_region->p_object_defs[i].i_x,
1095 p_region->p_object_defs[i].i_y,
1096 p_topfield, i_topfield );
1100 dvbsub_render_pdata( p_dec, p_region,
1101 p_region->p_object_defs[i].i_x,
1102 p_region->p_object_defs[i].i_y + 1,
1103 p_bottomfield, i_bottomfield );
1107 /* Duplicate the top field */
1108 dvbsub_render_pdata( p_dec, p_region,
1109 p_region->p_object_defs[i].i_x,
1110 p_region->p_object_defs[i].i_y + 1,
1111 p_topfield, i_topfield );
1118 /* DVB subtitling as characters */
1119 int i_number_of_codes = bs_read( s, 8 );
1120 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1123 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1124 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1126 msg_Dbg( p_dec, "corrupted object data" );
1130 for( p_region = p_sys->p_regions; p_region != NULL;
1131 p_region = p_region->p_next )
1133 for( i = 0; i < p_region->i_object_defs; i++ )
1137 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1139 p_region->p_object_defs[i].psz_text =
1140 realloc( p_region->p_object_defs[i].psz_text,
1141 i_number_of_codes + 1 );
1143 /* FIXME 16bits -> char ??? See Preamble */
1144 for( j = 0; j < i_number_of_codes; j++ )
1146 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1148 /* Null terminate the string */
1149 p_region->p_object_defs[i].psz_text[j] = 0;
1155 msg_Dbg( p_dec, "end object: %i", i_id );
1159 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1161 uint8_t *p_field, int i_field )
1168 if( !p_region->p_pixbuf )
1170 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1173 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1174 i_x >= p_region->i_width )
1176 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1180 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1181 bs_init( &bs, p_field, i_field );
1183 while( !bs_eof( &bs ) )
1186 if( i_y >= p_region->i_height ) return;
1188 switch( bs_read( &bs, 8 ) )
1191 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1196 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1201 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1208 /* We don't use map tables */
1211 case 0xf0: /* End of line code */
1212 p_pixbuf += 2*p_region->i_width;
1213 i_offset = 0; i_y += 2;
1219 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1221 bool b_stop = false;
1223 while( !b_stop && !bs_eof( s ) )
1225 int i_count = 0, i_color = 0;
1227 i_color = bs_read( s, 2 );
1228 if( i_color != 0x00 )
1234 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1236 i_count = 3 + bs_read( s, 3 );
1237 i_color = bs_read( s, 2 );
1241 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1243 switch( bs_read( s, 2 ) ) //Switch3
1252 i_count = 12 + bs_read( s, 4 );
1253 i_color = bs_read( s, 2 );
1256 i_count = 29 + bs_read( s, 8 );
1257 i_color = bs_read( s, 2 );
1265 /* 1 pixel color 0 */
1271 if( !i_count ) continue;
1274 if( ( i_count + *pi_off ) > i_width ) break;
1276 if( i_count == 1 ) p[*pi_off] = i_color;
1277 else memset( ( p + *pi_off ), i_color, i_count );
1279 (*pi_off) += i_count;
1285 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1287 bool b_stop = false;
1289 while( !b_stop && !bs_eof( s ) )
1291 int i_count = 0, i_color = 0;
1293 i_color = bs_read( s, 4 );
1294 if( i_color != 0x00 )
1301 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1303 if( bs_show( s, 3 ) != 0x00 )
1305 i_count = 2 + bs_read( s, 3 );
1315 if( bs_read( s, 1 ) == 0x00) //Switch2
1317 i_count = 4 + bs_read( s, 2 );
1318 i_color = bs_read( s, 4 );
1322 switch ( bs_read( s, 2 ) ) //Switch3
1331 i_count = 9 + bs_read( s, 4 );
1332 i_color = bs_read( s, 4 );
1335 i_count= 25 + bs_read( s, 8 );
1336 i_color = bs_read( s, 4 );
1343 if( !i_count ) continue;
1346 if( ( i_count + *pi_off ) > i_width ) break;
1348 if( i_count == 1 ) p[*pi_off] = i_color;
1349 else memset( ( p + *pi_off ), i_color, i_count );
1351 (*pi_off) += i_count;
1357 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1359 bool b_stop = false;
1361 while( !b_stop && !bs_eof( s ) )
1363 int i_count = 0, i_color = 0;
1365 i_color = bs_read( s, 8 );
1366 if( i_color != 0x00 )
1373 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1375 if( bs_show( s, 7 ) != 0x00 )
1377 i_count = bs_read( s, 7 );
1387 i_count = bs_read( s, 7 );
1388 i_color = bs_read( s, 8 );
1392 if( !i_count ) continue;
1395 if( ( i_count + *pi_off ) > i_width ) break;
1397 if( i_count == 1 ) p[*pi_off] = i_color;
1398 else memset( ( p + *pi_off ), i_color, i_count );
1400 (*pi_off) += i_count;
1406 static void free_all( decoder_t *p_dec )
1408 decoder_sys_t *p_sys = p_dec->p_sys;
1409 dvbsub_region_t *p_reg, *p_reg_next;
1410 dvbsub_clut_t *p_clut, *p_clut_next;
1412 free( p_sys->p_display );
1414 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1416 p_clut_next = p_clut->p_next;
1419 p_sys->p_cluts = NULL;
1421 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1425 p_reg_next = p_reg->p_next;
1426 for( i = 0; i < p_reg->i_object_defs; i++ )
1427 free( p_reg->p_object_defs[i].psz_text );
1428 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1429 free( p_reg->p_pixbuf );
1432 p_sys->p_regions = NULL;
1436 if( p_sys->p_page->i_region_defs )
1437 free( p_sys->p_page->p_region_defs );
1438 free( p_sys->p_page );
1440 p_sys->p_page = NULL;
1443 static subpicture_t *render( decoder_t *p_dec )
1445 decoder_sys_t *p_sys = p_dec->p_sys;
1446 subpicture_t *p_spu;
1447 subpicture_region_t **pp_spu_region;
1448 int i, j, i_timeout = 0;
1452 /* Allocate the subpicture internal data. */
1453 p_spu = decoder_NewSubpicture( p_dec );
1457 p_spu->b_absolute = p_sys->b_absolute;
1458 /* Set the pf_render callback */
1459 p_spu->i_start = (mtime_t) p_sys->i_pts;
1460 //p_spu->i_stop = (mtime_t) 0;
1461 p_spu->b_ephemer = true;
1462 //p_spu->b_fade = true;
1463 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1465 /* Correct positioning of SPU */
1466 i_base_x = p_sys->i_spu_x;
1467 i_base_y = p_sys->i_spu_y;
1468 p_spu->i_original_picture_width = 720;
1469 p_spu->i_original_picture_height = 576;
1471 if( p_sys->p_display )
1473 p_spu->i_original_picture_width = p_sys->p_display->i_width;
1474 p_spu->i_original_picture_height = p_sys->p_display->i_height;
1476 if( p_sys->p_display->b_windowed )
1478 /* TODO: check that this actually works */
1479 p_spu->i_original_picture_width = p_sys->p_display->i_max_x - p_sys->p_display->i_x;
1480 p_spu->i_original_picture_height = p_sys->p_display->i_max_y - p_sys->p_display->i_y;
1481 i_base_x += p_sys->p_display->i_x;
1482 i_base_y += p_sys->p_display->i_y;
1486 pp_spu_region = &p_spu->p_region;
1488 /* Loop on region definitions */
1491 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1494 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1496 dvbsub_region_t *p_region;
1497 dvbsub_regiondef_t *p_regiondef;
1498 dvbsub_clut_t *p_clut;
1499 dvbsub_color_t *p_color;
1500 subpicture_region_t *p_spu_region;
1501 uint8_t *p_src, *p_dst;
1503 video_palette_t palette;
1506 i_timeout = p_sys->p_page->i_timeout;
1508 p_regiondef = &p_sys->p_page->p_region_defs[i];
1511 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1512 p_regiondef->i_x, p_regiondef->i_y );
1515 /* Find associated region */
1516 for( p_region = p_sys->p_regions; p_region != NULL;
1517 p_region = p_region->p_next )
1519 if( p_regiondef->i_id == p_region->i_id ) break;
1524 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1528 /* Find associated CLUT */
1529 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1531 if( p_region->i_clut == p_clut->i_id ) break;
1535 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1539 /* FIXME: don't create a subpicture region with VLC CODEC YUVP
1540 * when it actually is a TEXT region */
1542 /* Create new SPU region */
1543 memset( &fmt, 0, sizeof(video_format_t) );
1544 fmt.i_chroma = VLC_CODEC_YUVP;
1545 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1546 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1547 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1548 fmt.i_x_offset = fmt.i_y_offset = 0;
1549 fmt.p_palette = &palette;
1550 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1551 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1552 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1553 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1554 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1556 fmt.p_palette->palette[j][0] = p_color[j].Y;
1557 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1558 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1559 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1562 p_spu_region = subpicture_region_New( &fmt );
1565 msg_Err( p_dec, "cannot allocate SPU region" );
1568 p_spu_region->i_x = i_base_x + p_regiondef->i_x;
1569 p_spu_region->i_y = i_base_y + p_regiondef->i_y;
1570 p_spu_region->i_align = p_sys->i_spu_position;
1571 *pp_spu_region = p_spu_region;
1572 pp_spu_region = &p_spu_region->p_next;
1574 p_src = p_region->p_pixbuf;
1575 p_dst = p_spu_region->p_picture->Y_PIXELS;
1576 i_pitch = p_spu_region->p_picture->Y_PITCH;
1578 /* Copy pixel buffer */
1579 for( j = 0; j < p_region->i_height; j++ )
1581 memcpy( p_dst, p_src, p_region->i_width );
1582 p_src += p_region->i_width;
1586 /* Check subtitles encoded as strings of characters
1587 * (since there are not rendered in the pixbuffer) */
1588 for( j = 0; j < p_region->i_object_defs; j++ )
1590 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1592 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1595 /* Create new SPU region */
1596 memset( &fmt, 0, sizeof(video_format_t) );
1597 fmt.i_chroma = VLC_CODEC_TEXT;
1598 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1599 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1600 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1601 fmt.i_x_offset = fmt.i_y_offset = 0;
1602 p_spu_region = subpicture_region_New( &fmt );
1605 msg_Err( p_dec, "cannot allocate SPU region" );
1609 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1610 p_spu_region->i_x = i_base_x + p_regiondef->i_x + p_object_def->i_x;
1611 p_spu_region->i_y = i_base_y + p_regiondef->i_y + p_object_def->i_y;
1612 p_spu_region->i_align = p_sys->i_spu_position;
1613 *pp_spu_region = p_spu_region;
1614 pp_spu_region = &p_spu_region->p_next;
1621 /*****************************************************************************
1622 * encoder_sys_t : encoder descriptor
1623 *****************************************************************************/
1624 typedef struct encoder_region_t
1631 struct encoder_sys_t
1633 unsigned int i_page_ver;
1634 unsigned int i_region_ver;
1635 unsigned int i_clut_ver;
1638 encoder_region_t *p_regions;
1642 /* subpicture positioning */
1647 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1648 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1649 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1650 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1652 /*****************************************************************************
1653 * OpenEncoder: probe the encoder and return score
1654 *****************************************************************************/
1655 static int OpenEncoder( vlc_object_t *p_this )
1657 encoder_t *p_enc = (encoder_t *)p_this;
1658 encoder_sys_t *p_sys;
1661 if( ( p_enc->fmt_out.i_codec != VLC_CODEC_DVBS ) &&
1664 return VLC_EGENERIC;
1667 /* Allocate the memory needed to store the decoder's structure */
1668 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1670 p_enc->p_sys = p_sys;
1672 p_enc->pf_encode_sub = Encode;
1673 p_enc->fmt_out.i_codec = VLC_CODEC_DVBS;
1674 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1676 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1678 p_sys->i_page_ver = 0;
1679 p_sys->i_region_ver = 0;
1680 p_sys->i_clut_ver = 0;
1681 p_sys->i_regions = 0;
1682 p_sys->p_regions = 0;
1684 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1685 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1686 p_sys->i_offset_x = val.i_int;
1687 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1688 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1689 p_sys->i_offset_y = val.i_int;
1694 /* FIXME: this routine is a hack to convert VLC_CODEC_YUVA
1695 * into VLC_CODEC_YUVP
1697 static subpicture_t *YuvaYuvp( subpicture_t *p_subpic )
1699 subpicture_region_t *p_region = NULL;
1701 if( !p_subpic ) return NULL;
1703 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1705 video_format_t *p_fmt = &p_region->fmt;
1706 int i = 0, j = 0, n = 0, p = 0;
1707 int i_max_entries = 256;
1709 #ifdef RANDOM_DITHERING
1710 int i_seed = 0xdeadbeef; /* random seed */
1714 int i_pixels = p_region->p_picture->p[0].i_visible_lines
1715 * p_region->p_picture->p[0].i_pitch;
1716 int i_iterator = p_region->p_picture->p[0].i_visible_lines * 3 / 4
1717 * p_region->p_picture->p[0].i_pitch
1718 + p_region->p_picture->p[0].i_pitch * 1 / 3;
1719 int i_tolerance = 0;
1722 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1724 p_fmt->i_chroma = VLC_CODEC_YUVP;
1725 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1726 if( !p_fmt->p_palette ) break;
1727 p_fmt->p_palette->i_entries = 0;
1729 /* Find best iterator using Euclide’s algorithm */
1730 for( ; i_iterator > 1 ; i_iterator-- )
1749 /* Count colors, build best palette */
1750 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1752 bool b_success = true;
1753 p_fmt->p_palette->i_entries = 0;
1755 for( i = 0; i < i_pixels ; )
1758 y = p_region->p_picture->p[0].p_pixels[i];
1759 u = p_region->p_picture->p[1].p_pixels[i];
1760 v = p_region->p_picture->p[2].p_pixels[i];
1761 a = p_region->p_picture->p[3].p_pixels[i];
1762 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1764 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1765 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1766 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1767 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1772 if( j == p_fmt->p_palette->i_entries )
1774 p_fmt->p_palette->palette[j][0] = y;
1775 p_fmt->p_palette->palette[j][1] = u;
1776 p_fmt->p_palette->palette[j][2] = v;
1777 p_fmt->p_palette->palette[j][3] = a;
1778 p_fmt->p_palette->i_entries++;
1780 if( p_fmt->p_palette->i_entries >= i_max_entries )
1799 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1802 #ifndef RANDOM_DITHERING
1803 pi_delta = malloc( ( p_region->p_picture->p[0].i_pitch + 1 )
1804 * sizeof(int) * 4 );
1805 for( i = 0; i < (p_region->p_picture->p[0].i_pitch + 1) * 4 ; i++ )
1811 /* Fill image with our new colours */
1812 for( p = 0; p < p_region->p_picture->p[0].i_visible_lines ; p++ )
1814 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1816 for( n = 0; n < p_region->p_picture->p[0].i_pitch ; n++ )
1818 int i_offset = p * p_region->p_picture->p[0].i_pitch + n;
1820 int i_mindist, i_best;
1822 y = (int)p_region->p_picture->p[0].p_pixels[i_offset];
1823 u = (int)p_region->p_picture->p[1].p_pixels[i_offset];
1824 v = (int)p_region->p_picture->p[2].p_pixels[i_offset];
1825 a = (int)p_region->p_picture->p[3].p_pixels[i_offset];
1827 /* Add dithering compensation */
1828 #ifdef RANDOM_DITHERING
1829 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1830 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1831 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1832 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1834 y += i_ydelta + pi_delta[ n * 4 ];
1835 u += i_udelta + pi_delta[ n * 4 + 1 ];
1836 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1837 a += i_adelta + pi_delta[ n * 4 + 3 ];
1840 /* Find best colour in palette */
1841 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1845 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1846 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1847 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1848 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1850 if( i_dist < i_mindist )
1857 /* Set pixel to best color */
1858 p_region->p_picture->p[0].p_pixels[i_offset] = i_best;
1860 /* Update dithering state */
1861 #ifdef RANDOM_DITHERING
1862 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1864 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1865 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1866 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1867 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1868 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1869 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1870 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1871 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1872 i_ydelta = i_ydelta * 5 / 8;
1873 i_udelta = i_udelta * 5 / 8;
1874 i_vdelta = i_vdelta * 5 / 8;
1875 i_adelta = i_adelta * 5 / 8;
1879 #ifndef RANDOM_DITHERING
1884 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1886 p_fmt->p_palette->palette[i][0] = 0;
1887 p_fmt->p_palette->palette[i][1] = 0;
1888 p_fmt->p_palette->palette[i][2] = 0;
1889 p_fmt->p_palette->palette[i][3] = 0;
1891 p_fmt->p_palette->i_entries = i_max_entries;
1893 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1899 /****************************************************************************
1900 * Encode: the whole thing
1901 ****************************************************************************/
1902 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1904 subpicture_t *p_temp = NULL;
1905 subpicture_region_t *p_region = NULL;
1906 bs_t bits, *s = &bits;
1909 if( !p_subpic || !p_subpic->p_region ) return NULL;
1911 /* FIXME: this is a hack to convert VLC_CODEC_YUVA into
1914 p_region = p_subpic->p_region;
1915 if( p_region->fmt.i_chroma == VLC_CODEC_YUVA )
1917 p_temp = YuvaYuvp( p_subpic );
1920 msg_Err( p_enc, "no picture in subpicture" );
1923 p_region = p_subpic->p_region;
1927 if( !p_region ) return NULL;
1929 if( ( p_region->fmt.i_chroma != VLC_CODEC_TEXT ) &&
1930 ( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) )
1933 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1934 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1935 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1939 if( p_region->fmt.p_palette )
1941 switch( p_region->fmt.p_palette->i_entries )
1949 msg_Err( p_enc, "subpicture palette (%d) not handled",
1950 p_region->fmt.p_palette->i_entries );
1957 msg_Dbg( p_enc, "encoding subpicture" );
1959 p_block = block_New( p_enc, 64000 );
1960 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1962 bs_write( s, 8, 0x20 ); /* Data identifier */
1963 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1965 encode_page_composition( p_enc, s, p_subpic );
1966 encode_region_composition( p_enc, s, p_subpic );
1967 encode_clut( p_enc, s, p_subpic );
1968 encode_object( p_enc, s, p_subpic );
1970 /* End of display */
1971 bs_write( s, 8, 0x0f ); /* Sync byte */
1972 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1973 bs_write( s, 16, 1 ); /* Page id */
1974 bs_write( s, 16, 0 ); /* Segment length */
1976 bs_write( s, 8, 0xff );/* End marker */
1977 p_block->i_buffer = bs_pos( s ) / 8;
1978 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1979 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
1981 block_t *p_block_stop;
1983 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1985 /* Send another (empty) subtitle to signal the end of display */
1986 p_block_stop = block_New( p_enc, 64000 );
1987 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1988 bs_write( s, 8, 0x20 ); /* Data identifier */
1989 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1990 encode_page_composition( p_enc, s, 0 );
1991 bs_write( s, 8, 0x0f ); /* Sync byte */
1992 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1993 bs_write( s, 16, 1 ); /* Page id */
1994 bs_write( s, 16, 0 ); /* Segment length */
1995 bs_write( s, 8, 0xff );/* End marker */
1996 p_block_stop->i_buffer = bs_pos( s ) / 8;
1997 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
1998 block_ChainAppend( &p_block, p_block_stop );
1999 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2002 msg_Dbg( p_enc, "subpicture encoded properly" );
2007 /*****************************************************************************
2008 * CloseEncoder: encoder destruction
2009 *****************************************************************************/
2010 static void CloseEncoder( vlc_object_t *p_this )
2012 encoder_t *p_enc = (encoder_t *)p_this;
2013 encoder_sys_t *p_sys = p_enc->p_sys;
2015 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2016 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2017 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2019 if( p_sys->i_regions ) free( p_sys->p_regions );
2023 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2024 subpicture_t *p_subpic )
2026 encoder_sys_t *p_sys = p_enc->p_sys;
2027 subpicture_region_t *p_region;
2028 bool b_mode_change = false;
2029 int i_regions, i_timeout;
2031 bs_write( s, 8, 0x0f ); /* Sync byte */
2032 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2033 bs_write( s, 16, 1 ); /* Page id */
2035 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2036 p_region; p_region = p_region->p_next, i_regions++ )
2038 if( i_regions >= p_sys->i_regions )
2040 encoder_region_t region;
2041 region.i_width = region.i_height = 0;
2043 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2044 (p_sys->i_regions + 1) );
2045 p_sys->p_regions[p_sys->i_regions++] = region;
2048 if( ( p_sys->p_regions[i_regions].i_width <
2049 (int)p_region->fmt.i_visible_width ) ||
2050 ( p_sys->p_regions[i_regions].i_width >
2051 (int)p_region->fmt.i_visible_width ) )
2053 b_mode_change = true;
2054 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2055 i_regions, p_sys->p_regions[i_regions].i_width,
2056 p_region->fmt.i_visible_width );
2057 p_sys->p_regions[i_regions].i_width =
2058 p_region->fmt.i_visible_width;
2060 if( p_sys->p_regions[i_regions].i_height <
2061 (int)p_region->fmt.i_visible_height )
2063 b_mode_change = true;
2064 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2065 i_regions, p_sys->p_regions[i_regions].i_height,
2066 p_region->fmt.i_visible_height );
2067 p_sys->p_regions[i_regions].i_height =
2068 p_region->fmt.i_visible_height;
2072 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2075 if( p_subpic && !p_subpic->b_ephemer &&
2076 ( p_subpic->i_stop > p_subpic->i_start ) )
2078 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2081 bs_write( s, 8, i_timeout ); /* Timeout */
2082 bs_write( s, 4, p_sys->i_page_ver++ );
2083 bs_write( s, 2, b_mode_change ?
2084 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2085 bs_write( s, 2, 0 ); /* Reserved */
2087 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2088 p_region; p_region = p_region->p_next, i_regions++ )
2090 bs_write( s, 8, i_regions );
2091 bs_write( s, 8, 0 ); /* Reserved */
2092 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2094 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2095 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2099 bs_write( s, 16, p_region->i_x );
2100 bs_write( s, 16, p_region->i_y );
2105 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2107 encoder_sys_t *p_sys = p_enc->p_sys;
2108 subpicture_region_t *p_region = p_subpic->p_region;
2109 video_palette_t *p_pal, pal;
2113 if( !p_region ) return;
2115 if( p_region->fmt.i_chroma == VLC_CODEC_YUVP )
2117 p_pal = p_region->fmt.p_palette;
2122 for( i = 0; i < 4; i++ )
2124 pal.palette[i][0] = 0;
2125 pal.palette[i][1] = 0;
2126 pal.palette[i][2] = 0;
2127 pal.palette[i][3] = 0;
2132 bs_write( s, 8, 0x0f ); /* Sync byte */
2133 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2134 bs_write( s, 16, 1 ); /* Page id */
2136 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2137 bs_write( s, 8, 1 ); /* Clut id */
2138 bs_write( s, 4, p_sys->i_clut_ver++ );
2139 bs_write( s, 4, 0 ); /* Reserved */
2141 for( i = 0; i < p_pal->i_entries; i++ )
2143 bs_write( s, 8, i ); /* Clut entry id */
2144 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2145 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2146 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2147 bs_write( s, 4, 0 ); /* Reserved */
2148 bs_write( s, 1, 1 ); /* Full range flag */
2149 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2150 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2151 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2152 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2153 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2157 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2158 subpicture_t *p_subpic )
2160 encoder_sys_t *p_sys = p_enc->p_sys;
2161 subpicture_region_t *p_region;
2164 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2165 p_region = p_region->p_next, i_region++ )
2167 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2169 ( p_region->fmt.i_chroma == VLC_CODEC_TEXT );
2173 video_palette_t *p_pal = p_region->fmt.p_palette;
2177 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2181 i_entries = p_pal->i_entries;
2182 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2184 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2186 if( !p_pal->palette[i_bg][3] ) break;
2190 bs_write( s, 8, 0x0f ); /* Sync byte */
2191 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2192 bs_write( s, 16, 1 ); /* Page id */
2194 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2195 bs_write( s, 8, i_region );
2196 bs_write( s, 4, p_sys->i_region_ver++ );
2198 /* Region attributes */
2199 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2200 bs_write( s, 3, 0 ); /* Reserved */
2201 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2202 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2203 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2204 bs_write( s, 3, i_depth ); /* Region depth */
2205 bs_write( s, 2, 0 ); /* Reserved */
2206 bs_write( s, 8, 1 ); /* Clut id */
2207 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2208 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2209 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2210 bs_write( s, 2, 0 ); /* Reserved */
2212 /* In our implementation we only have 1 object per region */
2213 bs_write( s, 16, i_region );
2214 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2215 bs_write( s, 2, 0 ); /* object provider flag */
2216 bs_write( s, 12, 0 );/* object horizontal position */
2217 bs_write( s, 4, 0 ); /* Reserved */
2218 bs_write( s, 12, 0 );/* object vertical position */
2222 bs_write( s, 8, 1 ); /* foreground pixel code */
2223 bs_write( s, 8, 0 ); /* background pixel code */
2228 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2229 subpicture_region_t *p_region,
2232 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2234 encoder_sys_t *p_sys = p_enc->p_sys;
2235 subpicture_region_t *p_region;
2238 int i_length_pos, i_update_pos, i_pixel_data_pos;
2240 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2241 p_region = p_region->p_next, i_region++ )
2243 bs_write( s, 8, 0x0f ); /* Sync byte */
2244 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2245 bs_write( s, 16, 1 ); /* Page id */
2247 i_length_pos = bs_pos( s );
2248 bs_write( s, 16, 0 ); /* Segment length */
2249 bs_write( s, 16, i_region ); /* Object id */
2250 bs_write( s, 4, p_sys->i_region_ver++ );
2252 /* object coding method */
2253 switch( p_region->fmt.i_chroma )
2255 case VLC_CODEC_YUVP:
2256 bs_write( s, 2, 0 );
2258 case VLC_CODEC_TEXT:
2259 bs_write( s, 2, 1 );
2262 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2266 bs_write( s, 1, 0 ); /* non modifying color flag */
2267 bs_write( s, 1, 0 ); /* Reserved */
2269 if( p_region->fmt.i_chroma == VLC_CODEC_TEXT )
2273 if( !p_region->psz_text ) continue;
2275 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2277 bs_write( s, 8, i_size ); /* number of characters in string */
2278 for( i = 0; i < i_size; i++ )
2280 bs_write( s, 16, p_region->psz_text[i] );
2283 /* Update segment length */
2284 SetWBE( &s->p_start[i_length_pos/8],
2285 (bs_pos(s) - i_length_pos)/8 -2 );
2289 /* Coding of a bitmap object */
2290 i_update_pos = bs_pos( s );
2291 bs_write( s, 16, 0 ); /* topfield data block length */
2292 bs_write( s, 16, 0 ); /* bottomfield data block length */
2295 i_pixel_data_pos = bs_pos( s );
2296 encode_pixel_data( p_enc, s, p_region, true );
2297 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2298 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2301 i_pixel_data_pos = bs_pos( s );
2302 encode_pixel_data( p_enc, s, p_region, false );
2303 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2304 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2306 /* Stuffing for word alignment */
2308 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2310 /* Update segment length */
2311 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2315 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2317 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2319 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2321 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2322 subpicture_region_t *p_region,
2325 unsigned int i_line;
2328 if( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) return;
2330 /* Encode line by line */
2331 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2334 switch( p_region->fmt.p_palette->i_entries )
2340 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2341 encode_pixel_line_2bp( s, p_region, i_line );
2345 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2346 encode_pixel_line_4bp( s, p_region, i_line );
2350 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2351 encode_pixel_line_8bp( s, p_region, i_line );
2355 msg_Err( p_enc, "subpicture palette (%i) not handled",
2356 p_region->fmt.p_palette->i_entries );
2360 bs_write( s, 8, 0xf0 ); /* End of object line code */
2364 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2367 unsigned int i, i_length = 0;
2368 int i_pitch = p_region->p_picture->p->i_pitch;
2369 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2370 int i_last_pixel = p_data[0];
2372 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2374 if( ( i != p_region->fmt.i_visible_width ) &&
2375 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2381 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2383 /* 2bit/pixel code */
2385 bs_write( s, 2, i_last_pixel );
2388 bs_write( s, 2, 0 );
2389 bs_write( s, 1, 0 );
2390 bs_write( s, 1, 1 ); /* pseudo color 0 */
2399 bs_write( s, 2, i_last_pixel );
2400 bs_write( s, 2, i_last_pixel );
2404 bs_write( s, 2, 0 );
2405 bs_write( s, 1, 0 );
2406 bs_write( s, 1, 0 );
2407 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2410 else if( i_length > 2 )
2412 bs_write( s, 2, 0 );
2413 if( i_length <= 10 )
2415 bs_write( s, 1, 1 );
2416 bs_write( s, 3, i_length - 3 );
2417 bs_write( s, 2, i_last_pixel );
2421 bs_write( s, 1, 0 );
2422 bs_write( s, 1, 0 );
2424 if( i_length <= 27 )
2426 bs_write( s, 2, 2 );
2427 bs_write( s, 4, i_length - 12 );
2428 bs_write( s, 2, i_last_pixel );
2432 bs_write( s, 2, 3 );
2433 bs_write( s, 8, i_length - 29 );
2434 bs_write( s, 2, i_last_pixel );
2439 if( i == p_region->fmt.i_visible_width ) break;
2441 i_last_pixel = p_data[i];
2446 bs_write( s, 2, 0 );
2447 bs_write( s, 1, 0 );
2448 bs_write( s, 1, 0 );
2449 bs_write( s, 2, 0 );
2455 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2458 unsigned int i, i_length = 0;
2459 int i_pitch = p_region->p_picture->p->i_pitch;
2460 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2461 int i_last_pixel = p_data[0];
2463 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2465 if( i != p_region->fmt.i_visible_width &&
2466 p_data[i] == i_last_pixel && i_length != 280 )
2472 if( ( i_length == 1 ) ||
2473 ( ( i_length == 3 ) && i_last_pixel ) ||
2476 /* 4bit/pixel code */
2478 bs_write( s, 4, i_last_pixel );
2481 bs_write( s, 4, 0 );
2482 bs_write( s, 1, 1 );
2483 bs_write( s, 1, 1 );
2484 bs_write( s, 2, 0 ); /* pseudo color 0 */
2493 bs_write( s, 4, i_last_pixel );
2494 bs_write( s, 4, i_last_pixel );
2498 bs_write( s, 4, 0 );
2499 bs_write( s, 1, 1 );
2500 bs_write( s, 1, 1 );
2501 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2504 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2506 bs_write( s, 4, 0 );
2507 bs_write( s, 1, 0 );
2508 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2510 else if( i_length > 2 )
2512 bs_write( s, 4, 0 );
2513 bs_write( s, 1, 1 );
2517 bs_write( s, 1, 0 );
2518 bs_write( s, 2, i_length - 4 );
2519 bs_write( s, 4, i_last_pixel );
2523 bs_write( s, 1, 1 );
2525 if( i_length <= 24 )
2527 bs_write( s, 2, 2 );
2528 bs_write( s, 4, i_length - 9 );
2529 bs_write( s, 4, i_last_pixel );
2533 bs_write( s, 2, 3 );
2534 bs_write( s, 8, i_length - 25 );
2535 bs_write( s, 4, i_last_pixel );
2540 if( i == p_region->fmt.i_visible_width ) break;
2542 i_last_pixel = p_data[i];
2547 bs_write( s, 8, 0 );
2553 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2556 unsigned int i, i_length = 0;
2557 int i_pitch = p_region->p_picture->p->i_pitch;
2558 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2559 int i_last_pixel = p_data[0];
2561 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2563 if( ( i != p_region->fmt.i_visible_width ) &&
2564 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2570 if( ( i_length == 1 ) && i_last_pixel )
2572 /* 8bit/pixel code */
2573 bs_write( s, 8, i_last_pixel );
2575 else if( ( i_length == 2 ) && i_last_pixel )
2577 /* 8bit/pixel code */
2578 bs_write( s, 8, i_last_pixel );
2579 bs_write( s, 8, i_last_pixel );
2581 else if( i_length <= 127 )
2583 bs_write( s, 8, 0 );
2587 bs_write( s, 1, 0 );
2588 bs_write( s, 7, i_length ); /* pseudo color 0 */
2592 bs_write( s, 1, 1 );
2593 bs_write( s, 7, i_length );
2594 bs_write( s, 8, i_last_pixel );
2598 if( i == p_region->fmt.i_visible_width ) break;
2600 i_last_pixel = p_data[i];
2605 bs_write( s, 8, 0 );
2606 bs_write( s, 8, 0 );