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 *****************************************************************************/
44 #include <vlc_codec.h>
49 /* #define DEBUG_DVBSUB 1 */
51 #define POSX_TEXT N_("Decoding X coordinate")
52 #define POSX_LONGTEXT N_("X coordinate of the rendered subtitle")
54 #define POSY_TEXT N_("Decoding Y coordinate")
55 #define POSY_LONGTEXT N_("Y coordinate of the rendered subtitle")
57 #define POS_TEXT N_("Subpicture position")
58 #define POS_LONGTEXT N_( \
59 "You can enforce the subpicture position on the video " \
60 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
61 "also use combinations of these values, e.g. 6=top-right).")
63 #define ENC_POSX_TEXT N_("Encoding X coordinate")
64 #define ENC_POSX_LONGTEXT N_("X coordinate of the encoded subtitle" )
65 #define ENC_POSY_TEXT N_("Encoding Y coordinate")
66 #define ENC_POSY_LONGTEXT N_("Y coordinate of the encoded subtitle" )
68 static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
69 static const char *ppsz_pos_descriptions[] =
70 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
71 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
73 /*****************************************************************************
75 *****************************************************************************/
76 static int Open ( vlc_object_t * );
77 static void Close( vlc_object_t * );
78 static subpicture_t *Decode( decoder_t *, block_t ** );
80 static int OpenEncoder ( vlc_object_t * );
81 static void CloseEncoder( vlc_object_t * );
82 static block_t *Encode ( encoder_t *, subpicture_t * );
85 # define DVBSUB_CFG_PREFIX "dvbsub-"
86 set_description( _("DVB subtitles decoder") );
87 set_capability( "decoder", 50 );
88 set_category( CAT_INPUT );
89 set_subcategory( SUBCAT_INPUT_SCODEC );
90 set_callbacks( Open, Close );
92 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, VLC_TRUE );
94 change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
95 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
97 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
100 # define ENC_CFG_PREFIX "sout-dvbsub-"
102 set_description( _("DVB subtitles encoder") );
103 set_capability( "encoder", 100 );
104 set_callbacks( OpenEncoder, CloseEncoder );
106 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 );
110 add_obsolete_integer( ENC_CFG_PREFIX "timeout" ); /* Suppressed since 0.8.5 */
113 static const char *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
153 vlc_bool_t b_windowed;
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 */
228 vlc_bool_t b_absolute;
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_FOURCC('d','v','b','s') )
303 p_dec->pf_decode_sub = Decode;
304 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
307 msg_Err( p_dec, "out of memory" );
310 memset( p_sys, 0, sizeof(decoder_sys_t) );
312 p_sys->i_pts = (mtime_t) 0;
313 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
314 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
316 p_sys->p_regions = NULL;
317 p_sys->p_cluts = NULL;
318 p_sys->p_page = NULL;
319 p_sys->p_display = NULL;
321 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
322 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
323 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
324 p_sys->i_spu_position = val.i_int;
325 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
326 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
327 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
329 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
330 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
331 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
334 /* Check if subpicture position was overridden */
335 p_sys->b_absolute = VLC_FALSE;
336 p_sys->i_spu_x = p_sys->i_spu_y = 0;
338 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
340 p_sys->b_absolute = VLC_TRUE;
341 p_sys->i_spu_x = i_posx;
342 p_sys->i_spu_y = i_posy;
345 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
347 default_clut_init( p_dec );
352 /*****************************************************************************
354 *****************************************************************************/
355 static void Close( vlc_object_t *p_this )
357 decoder_t *p_dec = (decoder_t*) p_this;
358 decoder_sys_t *p_sys = p_dec->p_sys;
360 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
361 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
362 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
368 /*****************************************************************************
370 *****************************************************************************/
371 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
373 decoder_sys_t *p_sys = p_dec->p_sys;
375 subpicture_t *p_spu = NULL;
377 if( ( pp_block == NULL ) || ( *pp_block == NULL ) ) return NULL;
381 p_sys->i_pts = p_block->i_pts;
382 if( p_sys->i_pts <= 0 )
385 /* Some DVB channels send stuffing segments in non-dated packets so
386 * don't complain too loudly. */
387 msg_Warn( p_dec, "non dated subtitle" );
389 block_Release( p_block );
393 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
395 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
397 msg_Dbg( p_dec, "invalid data identifier" );
398 block_Release( p_block );
402 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
404 msg_Dbg( p_dec, "invalid subtitle stream id" );
405 block_Release( p_block );
410 msg_Dbg( p_dec, "subtitle packet received: "I64Fd, p_sys->i_pts );
413 p_sys->b_page = VLC_FALSE;
414 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
416 decode_segment( p_dec, &p_sys->bs );
419 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
421 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
422 block_Release( p_block );
426 /* Check if the page is to be displayed */
427 if( p_sys->p_page && p_sys->b_page )
428 p_spu = render( p_dec );
430 block_Release( p_block );
435 /* following functions are local */
437 /*****************************************************************************
438 * default_clut_init: default clut as defined in EN 300-743 section 10
439 *****************************************************************************/
440 static void default_clut_init( decoder_t *p_dec )
442 decoder_sys_t *p_sys = p_dec->p_sys;
445 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
446 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
447 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
450 for( i = 0; i < 4; i++ )
452 uint8_t R = 0, G = 0, B = 0, T = 0;
454 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
455 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
456 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
457 else R = G = B = 0x7F;
459 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
460 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
461 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
462 p_sys->default_clut.c_2b[i].T = T;
465 /* 16 entries CLUT */
466 for( i = 0; i < 16; i++ )
468 uint8_t R = 0, G = 0, B = 0, T = 0;
472 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
478 R = (i & 0x1) ? 0xFF : 0;
479 G = (i & 0x2) ? 0xFF : 0;
480 B = (i & 0x4) ? 0xFF : 0;
485 R = (i & 0x1) ? 0x7F : 0;
486 G = (i & 0x2) ? 0x7F : 0;
487 B = (i & 0x4) ? 0x7F : 0;
490 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
491 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
492 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
493 p_sys->default_clut.c_4b[i].T = T;
496 /* 256 entries CLUT */
497 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
500 static void decode_segment( decoder_t *p_dec, bs_t *s )
502 decoder_sys_t *p_sys = p_dec->p_sys;
507 /* sync_byte (already checked) */
511 i_type = bs_read( s, 8 );
514 i_page_id = bs_read( s, 16 );
517 i_size = bs_show( s, 16 );
519 if( ( i_page_id != p_sys->i_id ) &&
520 ( i_page_id != p_sys->i_ancillary_id ) )
523 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
524 i_page_id, p_sys->i_id );
526 bs_skip( s, 8 * ( 2 + i_size ) );
530 if( ( p_sys->i_ancillary_id != p_sys->i_id ) &&
531 ( i_type == DVBSUB_ST_PAGE_COMPOSITION ) &&
532 ( i_page_id == p_sys->i_ancillary_id ) )
535 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
537 bs_skip( s, 8 * ( 2 + i_size ) );
542 if( i_page_id == p_sys->i_id )
543 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
545 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
550 case DVBSUB_ST_PAGE_COMPOSITION:
552 msg_Dbg( p_dec, "decode_page_composition" );
554 decode_page_composition( p_dec, s );
557 case DVBSUB_ST_REGION_COMPOSITION:
559 msg_Dbg( p_dec, "decode_region_composition" );
561 decode_region_composition( p_dec, s );
564 case DVBSUB_ST_CLUT_DEFINITION:
566 msg_Dbg( p_dec, "decode_clut" );
568 decode_clut( p_dec, s );
571 case DVBSUB_ST_OBJECT_DATA:
573 msg_Dbg( p_dec, "decode_object" );
575 decode_object( p_dec, s );
578 case DVBSUB_ST_DISPLAY_DEFINITION:
580 msg_Dbg( p_dec, "decode_display_definition" );
582 decode_display_definition( p_dec, s );
585 case DVBSUB_ST_ENDOFDISPLAY:
587 msg_Dbg( p_dec, "end of display" );
589 bs_skip( s, 8 * ( 2 + i_size ) );
592 case DVBSUB_ST_STUFFING:
594 msg_Dbg( p_dec, "skip stuffing" );
596 bs_skip( s, 8 * ( 2 + i_size ) );
600 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
601 bs_skip( s, 8 * ( 2 + i_size ) );
606 static void decode_clut( decoder_t *p_dec, bs_t *s )
608 decoder_sys_t *p_sys = p_dec->p_sys;
609 uint16_t i_segment_length;
610 uint16_t i_processed_length;
611 dvbsub_clut_t *p_clut, *p_next;
614 i_segment_length = bs_read( s, 16 );
615 i_id = bs_read( s, 8 );
616 i_version = bs_read( s, 4 );
618 /* Check if we already have this clut */
619 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
621 if( p_clut->i_id == i_id ) break;
624 /* Check version number */
625 if( p_clut && ( p_clut->i_version == i_version ) )
628 bs_skip( s, 8 * i_segment_length - 12 );
635 msg_Dbg( p_dec, "new clut: %i", i_id );
637 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) );
777 p_sys->p_page->i_version = i_version;
778 p_sys->p_page->i_timeout = i_timeout;
779 p_sys->b_page = VLC_TRUE;
781 /* Number of regions */
782 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
784 if( p_sys->p_page->i_region_defs == 0 ) return;
786 p_sys->p_page->p_region_defs =
787 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
788 if( p_sys->p_page->p_region_defs )
790 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
792 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
793 bs_skip( s, 8 ); /* Reserved */
794 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
795 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
798 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
799 i, p_sys->p_page->p_region_defs[i].i_x,
800 p_sys->p_page->p_region_defs[i].i_y );
806 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
808 decoder_sys_t *p_sys = p_dec->p_sys;
809 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
810 int i_segment_length, i_processed_length, i_id, i_version;
811 int i_width, i_height, i_level_comp, i_depth, i_clut;
812 int i_8_bg, i_4_bg, i_2_bg;
815 i_segment_length = bs_read( s, 16 );
816 i_id = bs_read( s, 8 );
817 i_version = bs_read( s, 4 );
819 /* Check if we already have this region */
820 for( p_region = p_sys->p_regions; p_region != NULL;
821 p_region = p_region->p_next )
823 pp_region = &p_region->p_next;
824 if( p_region->i_id == i_id ) break;
827 /* Check version number */
828 if( p_region && ( p_region->i_version == i_version ) )
830 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
837 msg_Dbg( p_dec, "new region: %i", i_id );
839 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
842 memset( p_region, 0, sizeof(dvbsub_region_t) );
843 p_region->p_object_defs = NULL;
844 p_region->p_pixbuf = NULL;
845 p_region->p_next = NULL;
849 /* Region attributes */
850 p_region->i_id = i_id;
851 p_region->i_version = i_version;
852 b_fill = bs_read( s, 1 );
853 bs_skip( s, 3 ); /* Reserved */
855 i_width = bs_read( s, 16 );
856 i_height = bs_read( s, 16 );
858 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
860 i_level_comp = bs_read( s, 3 );
861 i_depth = bs_read( s, 3 );
862 bs_skip( s, 2 ); /* Reserved */
863 i_clut = bs_read( s, 8 );
865 i_8_bg = bs_read( s, 8 );
866 i_4_bg = bs_read( s, 4 );
867 i_2_bg = bs_read( s, 2 );
868 bs_skip( s, 2 ); /* Reserved */
870 /* Free old object defs */
871 while( p_region->i_object_defs )
873 int i = p_region->i_object_defs - 1;
874 if( p_region->p_object_defs[i].psz_text )
875 free( p_region->p_object_defs[i].psz_text );
877 free( p_region->p_object_defs );
879 p_region->i_object_defs--;
881 p_region->p_object_defs = NULL;
883 /* Extra sanity checks */
884 if( ( p_region->i_width != i_width ) ||
885 ( p_region->i_height != i_height ) )
887 if( p_region->p_pixbuf )
889 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
890 p_region->i_width, p_region->i_height, i_width, i_height );
891 free( p_region->p_pixbuf );
894 p_region->p_pixbuf = malloc( i_height * i_width );
895 p_region->i_depth = 0;
898 if( p_region->i_depth &&
899 ( ( p_region->i_depth != i_depth ) ||
900 ( p_region->i_level_comp != i_level_comp ) ||
901 ( p_region->i_clut != i_clut) ) )
903 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
906 /* Erase background of region */
909 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
910 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
911 memset( p_region->p_pixbuf, i_background, i_width * i_height );
914 p_region->i_width = i_width;
915 p_region->i_height = i_height;
916 p_region->i_level_comp = i_level_comp;
917 p_region->i_depth = i_depth;
918 p_region->i_clut = i_clut;
920 /* List of objects in the region */
921 i_processed_length = 10;
922 while( i_processed_length < i_segment_length )
924 dvbsub_objectdef_t *p_obj;
926 /* We create a new object */
927 p_region->i_object_defs++;
928 p_region->p_object_defs =
929 realloc( p_region->p_object_defs,
930 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
932 /* We parse object properties */
933 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
934 p_obj->i_id = bs_read( s, 16 );
935 p_obj->i_type = bs_read( s, 2 );
936 bs_skip( s, 2 ); /* Provider */
937 p_obj->i_x = bs_read( s, 12 );
938 bs_skip( s, 4 ); /* Reserved */
939 p_obj->i_y = bs_read( s, 12 );
942 i_processed_length += 6;
944 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
945 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
947 p_obj->i_fg_pc = bs_read( s, 8 );
948 p_obj->i_bg_pc = bs_read( s, 8 );
949 i_processed_length += 2;
954 /* ETSI 300 743 [7.2.1] */
955 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
957 decoder_sys_t *p_sys = p_dec->p_sys;
958 uint16_t i_segment_length;
959 uint16_t i_processed_length = 40;
960 dvbsub_display_t *p_display;
961 dvbsub_display_t *p_old = p_sys->p_display;
964 i_segment_length = bs_read( s, 16 );
965 i_version = bs_read( s, 4 );
967 /* Check version number */
968 if( p_old && ( p_old->i_version == i_version ) )
970 /* The definition did not change */
971 bs_skip( s, 8*i_segment_length - 4 );
976 msg_Dbg( p_dec, "new display definition: %i", i_version );
978 p_display = malloc( sizeof(dvbsub_display_t) );
981 /* We don't have this version of the display definition: Parse it */
982 p_display->i_version = i_version;
983 p_display->b_windowed = bs_read( s, 1 );
984 bs_skip( s, 3 ); /* Reserved bits */
985 p_display->i_width = bs_read( s, 16 )+1;
986 p_display->i_height = bs_read( s, 16 )+1;
988 if( p_display->b_windowed )
991 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
993 /* Coordinates are measured from the top left corner */
994 p_display->i_x = bs_read( s, 16 );
995 p_display->i_max_x = bs_read( s, 16 );
996 p_display->i_y = bs_read( s, 16 );
997 p_display->i_max_y = bs_read( s, 16 );
998 i_processed_length += 64;
1002 p_sys->p_display = p_display;
1003 if( p_old ) free( p_old );
1005 if( i_processed_length != i_segment_length*8 )
1007 msg_Err( p_dec, "processed length %d != segment length %d",
1008 i_processed_length, i_segment_length );
1012 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1013 p_display->i_version, p_display->i_width, p_display->i_height );
1014 if( p_display->b_windowed )
1015 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1016 p_display->i_x, p_display->i_max_x, p_display->i_y, p_display->i_max_y );
1020 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1022 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1023 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1024 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1026 static void decode_object( decoder_t *p_dec, bs_t *s )
1028 decoder_sys_t *p_sys = p_dec->p_sys;
1029 dvbsub_region_t *p_region;
1030 int i_segment_length, i_coding_method, i_version, i_id, i;
1031 vlc_bool_t b_non_modify_color;
1033 /* ETSI 300-743 paragraph 7.2.4
1034 * sync_byte, segment_type and page_id have already been processed.
1036 i_segment_length = bs_read( s, 16 );
1037 i_id = bs_read( s, 16 );
1038 i_version = bs_read( s, 4 );
1039 i_coding_method = bs_read( s, 2 );
1041 if( i_coding_method > 1 )
1043 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1044 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1048 /* Check if the object needs to be rendered in at least one
1050 for( p_region = p_sys->p_regions; p_region != NULL;
1051 p_region = p_region->p_next )
1053 for( i = 0; i < p_region->i_object_defs; i++ )
1054 if( p_region->p_object_defs[i].i_id == i_id ) break;
1056 if( i != p_region->i_object_defs ) break;
1060 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1065 msg_Dbg( p_dec, "new object: %i", i_id );
1068 b_non_modify_color = bs_read( s, 1 );
1069 bs_skip( s, 1 ); /* Reserved */
1071 if( i_coding_method == 0x00 )
1073 int i_topfield, i_bottomfield;
1074 uint8_t *p_topfield, *p_bottomfield;
1076 i_topfield = bs_read( s, 16 );
1077 i_bottomfield = bs_read( s, 16 );
1078 p_topfield = s->p_start + bs_pos( s ) / 8;
1079 p_bottomfield = p_topfield + i_topfield;
1081 bs_skip( s, 8 * (i_segment_length - 7) );
1084 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1085 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1087 msg_Dbg( p_dec, "corrupted object data" );
1091 for( p_region = p_sys->p_regions; p_region != NULL;
1092 p_region = p_region->p_next )
1094 for( i = 0; i < p_region->i_object_defs; i++ )
1096 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1098 dvbsub_render_pdata( p_dec, p_region,
1099 p_region->p_object_defs[i].i_x,
1100 p_region->p_object_defs[i].i_y,
1101 p_topfield, i_topfield );
1105 dvbsub_render_pdata( p_dec, p_region,
1106 p_region->p_object_defs[i].i_x,
1107 p_region->p_object_defs[i].i_y + 1,
1108 p_bottomfield, i_bottomfield );
1112 /* Duplicate the top field */
1113 dvbsub_render_pdata( p_dec, p_region,
1114 p_region->p_object_defs[i].i_x,
1115 p_region->p_object_defs[i].i_y + 1,
1116 p_topfield, i_topfield );
1123 /* DVB subtitling as characters */
1124 int i_number_of_codes = bs_read( s, 8 );
1125 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1128 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1129 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1131 msg_Dbg( p_dec, "corrupted object data" );
1135 for( p_region = p_sys->p_regions; p_region != NULL;
1136 p_region = p_region->p_next )
1138 for( i = 0; i < p_region->i_object_defs; i++ )
1142 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1144 p_region->p_object_defs[i].psz_text =
1145 realloc( p_region->p_object_defs[i].psz_text,
1146 i_number_of_codes + 1 );
1148 /* FIXME 16bits -> char ??? See Preamble */
1149 for( j = 0; j < i_number_of_codes; j++ )
1151 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1153 /* Null terminate the string */
1154 p_region->p_object_defs[i].psz_text[j] = 0;
1160 msg_Dbg( p_dec, "end object: %i", i_id );
1164 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1166 uint8_t *p_field, int i_field )
1173 if( !p_region->p_pixbuf )
1175 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1178 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1179 i_x >= p_region->i_width )
1181 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1185 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1186 bs_init( &bs, p_field, i_field );
1188 while( !bs_eof( &bs ) )
1191 if( i_y >= p_region->i_height ) return;
1193 switch( bs_read( &bs, 8 ) )
1196 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1201 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1206 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1213 /* We don't use map tables */
1216 case 0xf0: /* End of line code */
1217 p_pixbuf += 2*p_region->i_width;
1218 i_offset = 0; i_y += 2;
1224 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1226 vlc_bool_t b_stop = VLC_FALSE;
1228 while( !b_stop && !bs_eof( s ) )
1230 int i_count = 0, i_color = 0;
1232 i_color = bs_read( s, 2 );
1233 if( i_color != 0x00 )
1239 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1241 i_count = 3 + bs_read( s, 3 );
1242 i_color = bs_read( s, 2 );
1246 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1248 switch( bs_read( s, 2 ) ) //Switch3
1257 i_count = 12 + bs_read( s, 4 );
1258 i_color = bs_read( s, 2 );
1261 i_count = 29 + bs_read( s, 8 );
1262 i_color = bs_read( s, 2 );
1270 /* 1 pixel color 0 */
1276 if( !i_count ) continue;
1279 if( ( i_count + *pi_off ) > i_width ) break;
1281 if( i_count == 1 ) p[*pi_off] = i_color;
1282 else memset( ( p + *pi_off ), i_color, i_count );
1284 (*pi_off) += i_count;
1290 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1292 vlc_bool_t b_stop = VLC_FALSE;
1294 while( !b_stop && !bs_eof( s ) )
1296 int i_count = 0, i_color = 0;
1298 i_color = bs_read( s, 4 );
1299 if( i_color != 0x00 )
1306 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1308 if( bs_show( s, 3 ) != 0x00 )
1310 i_count = 2 + bs_read( s, 3 );
1320 if( bs_read( s, 1 ) == 0x00) //Switch2
1322 i_count = 4 + bs_read( s, 2 );
1323 i_color = bs_read( s, 4 );
1327 switch ( bs_read( s, 2 ) ) //Switch3
1336 i_count = 9 + bs_read( s, 4 );
1337 i_color = bs_read( s, 4 );
1340 i_count= 25 + bs_read( s, 8 );
1341 i_color = bs_read( s, 4 );
1348 if( !i_count ) continue;
1351 if( ( i_count + *pi_off ) > i_width ) break;
1353 if( i_count == 1 ) p[*pi_off] = i_color;
1354 else memset( ( p + *pi_off ), i_color, i_count );
1356 (*pi_off) += i_count;
1362 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1364 vlc_bool_t b_stop = VLC_FALSE;
1366 while( !b_stop && !bs_eof( s ) )
1368 int i_count = 0, i_color = 0;
1370 i_color = bs_read( s, 8 );
1371 if( i_color != 0x00 )
1378 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1380 if( bs_show( s, 7 ) != 0x00 )
1382 i_count = bs_read( s, 7 );
1392 i_count = bs_read( s, 7 );
1393 i_color = bs_read( s, 8 );
1397 if( !i_count ) continue;
1400 if( ( i_count + *pi_off ) > i_width ) break;
1402 if( i_count == 1 ) p[*pi_off] = i_color;
1403 else memset( ( p + *pi_off ), i_color, i_count );
1405 (*pi_off) += i_count;
1411 static void free_all( decoder_t *p_dec )
1413 decoder_sys_t *p_sys = p_dec->p_sys;
1414 dvbsub_region_t *p_reg, *p_reg_next;
1415 dvbsub_clut_t *p_clut, *p_clut_next;
1417 if( p_sys->p_display ) free( p_sys->p_display );
1419 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1421 p_clut_next = p_clut->p_next;
1424 p_sys->p_cluts = NULL;
1426 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1430 p_reg_next = p_reg->p_next;
1431 for( i = 0; i < p_reg->i_object_defs; i++ )
1432 if( p_reg->p_object_defs[i].psz_text )
1433 free( p_reg->p_object_defs[i].psz_text );
1434 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1435 if( p_reg->p_pixbuf ) free( p_reg->p_pixbuf );
1438 p_sys->p_regions = NULL;
1442 if( p_sys->p_page->i_region_defs )
1443 free( p_sys->p_page->p_region_defs );
1444 free( p_sys->p_page );
1446 p_sys->p_page = NULL;
1449 static subpicture_t *render( decoder_t *p_dec )
1451 decoder_sys_t *p_sys = p_dec->p_sys;
1452 subpicture_t *p_spu;
1453 subpicture_region_t **pp_spu_region;
1454 int i, j, i_timeout = 0;
1456 /* Allocate the subpicture internal data. */
1457 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1458 if( !p_spu ) return NULL;
1460 pp_spu_region = &p_spu->p_region;
1462 /* Loop on region definitions */
1465 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1468 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1470 dvbsub_region_t *p_region;
1471 dvbsub_regiondef_t *p_regiondef;
1472 dvbsub_clut_t *p_clut;
1473 dvbsub_color_t *p_color;
1474 subpicture_region_t *p_spu_region;
1475 uint8_t *p_src, *p_dst;
1479 i_timeout = p_sys->p_page->i_timeout;
1481 p_regiondef = &p_sys->p_page->p_region_defs[i];
1484 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1485 p_regiondef->i_x, p_regiondef->i_y );
1488 /* Find associated region */
1489 for( p_region = p_sys->p_regions; p_region != NULL;
1490 p_region = p_region->p_next )
1492 if( p_regiondef->i_id == p_region->i_id ) break;
1497 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1501 /* Find associated CLUT */
1502 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1504 if( p_region->i_clut == p_clut->i_id ) break;
1508 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1512 /* FIXME: don't create a subpicture region with VLC_FOURCC YUVP
1513 * when it actually is a TEXT region */
1515 /* Create new SPU region */
1516 memset( &fmt, 0, sizeof(video_format_t) );
1517 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1518 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1519 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1520 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1521 fmt.i_x_offset = fmt.i_y_offset = 0;
1522 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1525 msg_Err( p_dec, "cannot allocate SPU region" );
1528 p_spu_region->i_x = p_regiondef->i_x;
1529 p_spu_region->i_y = p_regiondef->i_y;
1530 p_spu_region->i_align = p_sys->i_spu_position;
1531 *pp_spu_region = p_spu_region;
1532 pp_spu_region = &p_spu_region->p_next;
1535 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1536 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1537 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1538 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1539 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1541 fmt.p_palette->palette[j][0] = p_color[j].Y;
1542 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1543 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1544 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1547 p_src = p_region->p_pixbuf;
1548 p_dst = p_spu_region->picture.Y_PIXELS;
1549 i_pitch = p_spu_region->picture.Y_PITCH;
1551 /* Copy pixel buffer */
1552 for( j = 0; j < p_region->i_height; j++ )
1554 memcpy( p_dst, p_src, p_region->i_width );
1555 p_src += p_region->i_width;
1559 /* Check subtitles encoded as strings of characters
1560 * (since there are not rendered in the pixbuffer) */
1561 for( j = 0; j < p_region->i_object_defs; j++ )
1563 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1565 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1568 /* Create new SPU region */
1569 memset( &fmt, 0, sizeof(video_format_t) );
1570 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
1571 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1572 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1573 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1574 fmt.i_x_offset = fmt.i_y_offset = 0;
1575 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1578 msg_Err( p_dec, "cannot allocate SPU region" );
1582 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1583 p_spu_region->i_x = p_regiondef->i_x + p_object_def->i_x;
1584 p_spu_region->i_y = p_regiondef->i_y + p_object_def->i_y;
1585 p_spu_region->i_align = p_sys->i_spu_position;
1586 *pp_spu_region = p_spu_region;
1587 pp_spu_region = &p_spu_region->p_next;
1591 /* Set the pf_render callback */
1592 p_spu->i_start = (mtime_t) p_sys->i_pts;
1593 //p_spu->i_stop = (mtime_t) 0;
1594 p_spu->b_ephemer = VLC_TRUE;
1595 p_spu->b_pausable = VLC_TRUE;
1596 //p_spu->b_fade = VLC_TRUE;
1597 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1599 /* Correct positioning of SPU */
1600 p_spu->b_absolute = p_sys->b_absolute;
1601 p_spu->i_flags = p_sys->i_spu_position;
1602 p_spu->i_x = p_sys->i_spu_x;
1603 p_spu->i_y = p_sys->i_spu_y;
1604 p_spu->i_original_picture_width = 720;
1605 p_spu->i_original_picture_height = 576;
1607 if( p_sys->p_display )
1609 p_spu->i_original_picture_width = p_sys->p_display->i_width;
1610 p_spu->i_original_picture_height = p_sys->p_display->i_height;
1612 if( p_sys->p_display->b_windowed )
1614 /* TODO: check that this actually works */
1615 p_spu->i_original_picture_width = p_sys->p_display->i_max_x - p_sys->p_display->i_x;
1616 p_spu->i_original_picture_height = p_sys->p_display->i_max_y - p_sys->p_display->i_y;
1617 p_spu->i_x += p_sys->p_display->i_x;
1618 p_spu->i_y += p_sys->p_display->i_y;
1625 /*****************************************************************************
1626 * encoder_sys_t : encoder descriptor
1627 *****************************************************************************/
1628 typedef struct encoder_region_t
1635 struct encoder_sys_t
1637 unsigned int i_page_ver;
1638 unsigned int i_region_ver;
1639 unsigned int i_clut_ver;
1642 encoder_region_t *p_regions;
1646 /* subpicture positioning */
1651 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1652 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1653 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1654 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1656 /*****************************************************************************
1657 * OpenEncoder: probe the encoder and return score
1658 *****************************************************************************/
1659 static int OpenEncoder( vlc_object_t *p_this )
1661 encoder_t *p_enc = (encoder_t *)p_this;
1662 encoder_sys_t *p_sys;
1665 if( ( p_enc->fmt_out.i_codec != VLC_FOURCC('d','v','b','s') ) &&
1668 return VLC_EGENERIC;
1671 /* Allocate the memory needed to store the decoder's structure */
1672 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1674 msg_Err( p_enc, "out of memory" );
1677 p_enc->p_sys = p_sys;
1679 p_enc->pf_encode_sub = Encode;
1680 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1681 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1683 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1685 p_sys->i_page_ver = 0;
1686 p_sys->i_region_ver = 0;
1687 p_sys->i_clut_ver = 0;
1688 p_sys->i_regions = 0;
1689 p_sys->p_regions = 0;
1691 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1692 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1693 p_sys->i_offset_x = val.i_int;
1694 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1695 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1696 p_sys->i_offset_y = val.i_int;
1701 /* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
1702 * into VLC_FOURCC('Y','U','V','P')
1704 static subpicture_t *YuvaYuvp( encoder_t *p_enc, subpicture_t *p_subpic )
1706 subpicture_region_t *p_region = NULL;
1708 if( !p_subpic ) return NULL;
1710 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1712 video_format_t *p_fmt = &p_region->fmt;
1713 int i = 0, j = 0, n = 0, p = 0;
1714 int i_max_entries = 256;
1716 #ifdef RANDOM_DITHERING
1717 int i_seed = 0xdeadbeef; /* random seed */
1721 int i_pixels = p_region->picture.p[0].i_visible_lines
1722 * p_region->picture.p[0].i_pitch;
1723 int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
1724 * p_region->picture.p[0].i_pitch
1725 + p_region->picture.p[0].i_pitch * 1 / 3;
1726 int i_tolerance = 0;
1729 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1731 p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
1732 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1733 if( !p_fmt->p_palette ) break;
1734 p_fmt->p_palette->i_entries = 0;
1736 /* Find best iterator using Euclide’s algorithm */
1737 for( ; i_iterator > 1 ; i_iterator-- )
1756 /* Count colors, build best palette */
1757 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1759 vlc_bool_t b_success = VLC_TRUE;
1760 p_fmt->p_palette->i_entries = 0;
1762 for( i = 0; i < i_pixels ; )
1765 y = p_region->picture.p[0].p_pixels[i];
1766 u = p_region->picture.p[1].p_pixels[i];
1767 v = p_region->picture.p[2].p_pixels[i];
1768 a = p_region->picture.p[3].p_pixels[i];
1769 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1771 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1772 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1773 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1774 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1779 if( j == p_fmt->p_palette->i_entries )
1781 p_fmt->p_palette->palette[j][0] = y;
1782 p_fmt->p_palette->palette[j][1] = u;
1783 p_fmt->p_palette->palette[j][2] = v;
1784 p_fmt->p_palette->palette[j][3] = a;
1785 p_fmt->p_palette->i_entries++;
1787 if( p_fmt->p_palette->i_entries >= i_max_entries )
1789 b_success = VLC_FALSE;
1806 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1809 #ifndef RANDOM_DITHERING
1810 pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
1811 * sizeof(int) * 4 );
1812 for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
1818 /* Fill image with our new colours */
1819 for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
1821 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1823 for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
1825 int i_offset = p * p_region->picture.p[0].i_pitch + n;
1827 int i_mindist, i_best;
1829 y = (int)p_region->picture.p[0].p_pixels[i_offset];
1830 u = (int)p_region->picture.p[1].p_pixels[i_offset];
1831 v = (int)p_region->picture.p[2].p_pixels[i_offset];
1832 a = (int)p_region->picture.p[3].p_pixels[i_offset];
1834 /* Add dithering compensation */
1835 #ifdef RANDOM_DITHERING
1836 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1837 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1838 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1839 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1841 y += i_ydelta + pi_delta[ n * 4 ];
1842 u += i_udelta + pi_delta[ n * 4 + 1 ];
1843 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1844 a += i_adelta + pi_delta[ n * 4 + 3 ];
1847 /* Find best colour in palette */
1848 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1852 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1853 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1854 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1855 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1857 if( i_dist < i_mindist )
1864 /* Set pixel to best color */
1865 p_region->picture.p[0].p_pixels[i_offset] = i_best;
1867 /* Update dithering state */
1868 #ifdef RANDOM_DITHERING
1869 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1871 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1872 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1873 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1874 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1875 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1876 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1877 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1878 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1879 i_ydelta = i_ydelta * 5 / 8;
1880 i_udelta = i_udelta * 5 / 8;
1881 i_vdelta = i_vdelta * 5 / 8;
1882 i_adelta = i_adelta * 5 / 8;
1886 #ifndef RANDOM_DITHERING
1891 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1893 p_fmt->p_palette->palette[i][0] = 0;
1894 p_fmt->p_palette->palette[i][1] = 0;
1895 p_fmt->p_palette->palette[i][2] = 0;
1896 p_fmt->p_palette->palette[i][3] = 0;
1898 p_fmt->p_palette->i_entries = i_max_entries;
1900 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1906 /****************************************************************************
1907 * Encode: the whole thing
1908 ****************************************************************************/
1909 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1911 subpicture_t *p_temp = NULL;
1912 subpicture_region_t *p_region = NULL;
1913 bs_t bits, *s = &bits;
1916 if( !p_subpic || !p_subpic->p_region ) return NULL;
1918 /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
1919 * VLC_FOURCC('Y','U','V','P')
1921 p_region = p_subpic->p_region;
1922 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
1924 p_temp = YuvaYuvp( p_enc, p_subpic );
1927 msg_Err( p_enc, "no picture in subpicture" );
1930 p_region = p_subpic->p_region;
1934 if( !p_region ) return NULL;
1936 if( ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) &&
1937 ( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) )
1940 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1941 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1942 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1946 if( p_region->fmt.p_palette )
1948 switch( p_region->fmt.p_palette->i_entries )
1956 msg_Err( p_enc, "subpicture palette (%d) not handled",
1957 p_region->fmt.p_palette->i_entries );
1964 msg_Dbg( p_enc, "encoding subpicture" );
1966 p_block = block_New( p_enc, 64000 );
1967 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1969 bs_write( s, 8, 0x20 ); /* Data identifier */
1970 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1972 encode_page_composition( p_enc, s, p_subpic );
1973 encode_region_composition( p_enc, s, p_subpic );
1974 encode_clut( p_enc, s, p_subpic );
1975 encode_object( p_enc, s, p_subpic );
1977 /* End of display */
1978 bs_write( s, 8, 0x0f ); /* Sync byte */
1979 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1980 bs_write( s, 16, 1 ); /* Page id */
1981 bs_write( s, 16, 0 ); /* Segment length */
1983 bs_write( s, 8, 0xff );/* End marker */
1984 p_block->i_buffer = bs_pos( s ) / 8;
1985 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1986 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
1988 block_t *p_block_stop;
1990 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1992 /* Send another (empty) subtitle to signal the end of display */
1993 p_block_stop = block_New( p_enc, 64000 );
1994 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1995 bs_write( s, 8, 0x20 ); /* Data identifier */
1996 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1997 encode_page_composition( p_enc, s, 0 );
1998 bs_write( s, 8, 0x0f ); /* Sync byte */
1999 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
2000 bs_write( s, 16, 1 ); /* Page id */
2001 bs_write( s, 16, 0 ); /* Segment length */
2002 bs_write( s, 8, 0xff );/* End marker */
2003 p_block_stop->i_buffer = bs_pos( s ) / 8;
2004 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
2005 block_ChainAppend( &p_block, p_block_stop );
2006 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2009 msg_Dbg( p_enc, "subpicture encoded properly" );
2014 /*****************************************************************************
2015 * CloseEncoder: encoder destruction
2016 *****************************************************************************/
2017 static void CloseEncoder( vlc_object_t *p_this )
2019 encoder_t *p_enc = (encoder_t *)p_this;
2020 encoder_sys_t *p_sys = p_enc->p_sys;
2022 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2023 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2024 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2026 if( p_sys->i_regions ) free( p_sys->p_regions );
2030 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2031 subpicture_t *p_subpic )
2033 encoder_sys_t *p_sys = p_enc->p_sys;
2034 subpicture_region_t *p_region;
2035 vlc_bool_t b_mode_change = VLC_FALSE;
2036 int i_regions, i_timeout;
2038 bs_write( s, 8, 0x0f ); /* Sync byte */
2039 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2040 bs_write( s, 16, 1 ); /* Page id */
2042 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2043 p_region; p_region = p_region->p_next, i_regions++ )
2045 if( i_regions >= p_sys->i_regions )
2047 encoder_region_t region;
2048 region.i_width = region.i_height = 0;
2050 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2051 (p_sys->i_regions + 1) );
2052 p_sys->p_regions[p_sys->i_regions++] = region;
2055 if( ( p_sys->p_regions[i_regions].i_width <
2056 (int)p_region->fmt.i_visible_width ) ||
2057 ( p_sys->p_regions[i_regions].i_width >
2058 (int)p_region->fmt.i_visible_width ) )
2060 b_mode_change = VLC_TRUE;
2061 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2062 i_regions, p_sys->p_regions[i_regions].i_width,
2063 p_region->fmt.i_visible_width );
2064 p_sys->p_regions[i_regions].i_width =
2065 p_region->fmt.i_visible_width;
2067 if( p_sys->p_regions[i_regions].i_height <
2068 (int)p_region->fmt.i_visible_height )
2070 b_mode_change = VLC_TRUE;
2071 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2072 i_regions, p_sys->p_regions[i_regions].i_height,
2073 p_region->fmt.i_visible_height );
2074 p_sys->p_regions[i_regions].i_height =
2075 p_region->fmt.i_visible_height;
2079 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2082 if( p_subpic && !p_subpic->b_ephemer &&
2083 ( p_subpic->i_stop > p_subpic->i_start ) )
2085 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2088 bs_write( s, 8, i_timeout ); /* Timeout */
2089 bs_write( s, 4, p_sys->i_page_ver++ );
2090 bs_write( s, 2, b_mode_change ?
2091 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2092 bs_write( s, 2, 0 ); /* Reserved */
2094 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2095 p_region; p_region = p_region->p_next, i_regions++ )
2097 bs_write( s, 8, i_regions );
2098 bs_write( s, 8, 0 ); /* Reserved */
2099 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2101 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2102 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2106 bs_write( s, 16, p_subpic->i_x + p_region->i_x );
2107 bs_write( s, 16, p_subpic->i_y + p_region->i_y );
2112 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2114 encoder_sys_t *p_sys = p_enc->p_sys;
2115 subpicture_region_t *p_region = p_subpic->p_region;
2116 video_palette_t *p_pal, pal;
2120 if( !p_region ) return;
2122 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
2124 p_pal = p_region->fmt.p_palette;
2129 for( i = 0; i < 4; i++ )
2131 pal.palette[i][0] = 0;
2132 pal.palette[i][1] = 0;
2133 pal.palette[i][2] = 0;
2134 pal.palette[i][3] = 0;
2139 bs_write( s, 8, 0x0f ); /* Sync byte */
2140 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2141 bs_write( s, 16, 1 ); /* Page id */
2143 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2144 bs_write( s, 8, 1 ); /* Clut id */
2145 bs_write( s, 4, p_sys->i_clut_ver++ );
2146 bs_write( s, 4, 0 ); /* Reserved */
2148 for( i = 0; i < p_pal->i_entries; i++ )
2150 bs_write( s, 8, i ); /* Clut entry id */
2151 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2152 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2153 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2154 bs_write( s, 4, 0 ); /* Reserved */
2155 bs_write( s, 1, 1 ); /* Full range flag */
2156 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2157 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2158 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2159 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2160 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2164 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2165 subpicture_t *p_subpic )
2167 encoder_sys_t *p_sys = p_enc->p_sys;
2168 subpicture_region_t *p_region;
2171 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2172 p_region = p_region->p_next, i_region++ )
2174 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2176 ( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') );
2180 video_palette_t *p_pal = p_region->fmt.p_palette;
2184 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2188 i_entries = p_pal->i_entries;
2189 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2191 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2193 if( !p_pal->palette[i_bg][3] ) break;
2197 bs_write( s, 8, 0x0f ); /* Sync byte */
2198 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2199 bs_write( s, 16, 1 ); /* Page id */
2201 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2202 bs_write( s, 8, i_region );
2203 bs_write( s, 4, p_sys->i_region_ver++ );
2205 /* Region attributes */
2206 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2207 bs_write( s, 3, 0 ); /* Reserved */
2208 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2209 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2210 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2211 bs_write( s, 3, i_depth ); /* Region depth */
2212 bs_write( s, 2, 0 ); /* Reserved */
2213 bs_write( s, 8, 1 ); /* Clut id */
2214 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2215 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2216 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2217 bs_write( s, 2, 0 ); /* Reserved */
2219 /* In our implementation we only have 1 object per region */
2220 bs_write( s, 16, i_region );
2221 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2222 bs_write( s, 2, 0 ); /* object provider flag */
2223 bs_write( s, 12, 0 );/* object horizontal position */
2224 bs_write( s, 4, 0 ); /* Reserved */
2225 bs_write( s, 12, 0 );/* object vertical position */
2229 bs_write( s, 8, 1 ); /* foreground pixel code */
2230 bs_write( s, 8, 0 ); /* background pixel code */
2235 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2236 subpicture_region_t *p_region,
2239 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2241 encoder_sys_t *p_sys = p_enc->p_sys;
2242 subpicture_region_t *p_region;
2245 int i_length_pos, i_update_pos, i_pixel_data_pos;
2247 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2248 p_region = p_region->p_next, i_region++ )
2250 bs_write( s, 8, 0x0f ); /* Sync byte */
2251 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2252 bs_write( s, 16, 1 ); /* Page id */
2254 i_length_pos = bs_pos( s );
2255 bs_write( s, 16, 0 ); /* Segment length */
2256 bs_write( s, 16, i_region ); /* Object id */
2257 bs_write( s, 4, p_sys->i_region_ver++ );
2259 /* object coding method */
2260 switch( p_region->fmt.i_chroma )
2262 case VLC_FOURCC( 'Y','U','V','P' ):
2263 bs_write( s, 2, 0 );
2265 case VLC_FOURCC( 'T','E','X','T' ):
2266 bs_write( s, 2, 1 );
2269 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2273 bs_write( s, 1, 0 ); /* non modifying color flag */
2274 bs_write( s, 1, 0 ); /* Reserved */
2276 if( p_region->fmt.i_chroma == VLC_FOURCC( 'T','E','X','T' ) )
2280 if( !p_region->psz_text ) continue;
2282 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2284 bs_write( s, 8, i_size ); /* number of characters in string */
2285 for( i = 0; i < i_size; i++ )
2287 bs_write( s, 16, p_region->psz_text[i] );
2290 /* Update segment length */
2291 SetWBE( &s->p_start[i_length_pos/8],
2292 (bs_pos(s) - i_length_pos)/8 -2 );
2296 /* Coding of a bitmap object */
2297 i_update_pos = bs_pos( s );
2298 bs_write( s, 16, 0 ); /* topfield data block length */
2299 bs_write( s, 16, 0 ); /* bottomfield data block length */
2302 i_pixel_data_pos = bs_pos( s );
2303 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
2304 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2305 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2308 i_pixel_data_pos = bs_pos( s );
2309 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
2310 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2311 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2313 /* Stuffing for word alignment */
2315 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2317 /* Update segment length */
2318 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2322 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2323 subpicture_region_t *p_region,
2325 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2326 subpicture_region_t *p_region,
2328 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2329 subpicture_region_t *p_region,
2331 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2332 subpicture_region_t *p_region,
2335 unsigned int i_line;
2338 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
2340 /* Encode line by line */
2341 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2344 switch( p_region->fmt.p_palette->i_entries )
2350 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2351 encode_pixel_line_2bp( p_enc, s, p_region, i_line );
2355 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2356 encode_pixel_line_4bp( p_enc, s, p_region, i_line );
2360 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2361 encode_pixel_line_8bp( p_enc, s, p_region, i_line );
2365 msg_Err( p_enc, "subpicture palette (%i) not handled",
2366 p_region->fmt.p_palette->i_entries );
2370 bs_write( s, 8, 0xf0 ); /* End of object line code */
2374 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2375 subpicture_region_t *p_region,
2378 unsigned int i, i_length = 0;
2379 int i_pitch = p_region->picture.p->i_pitch;
2380 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2381 int i_last_pixel = p_data[0];
2383 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2385 if( ( i != p_region->fmt.i_visible_width ) &&
2386 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2392 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2394 /* 2bit/pixel code */
2396 bs_write( s, 2, i_last_pixel );
2399 bs_write( s, 2, 0 );
2400 bs_write( s, 1, 0 );
2401 bs_write( s, 1, 1 ); /* pseudo color 0 */
2410 bs_write( s, 2, i_last_pixel );
2411 bs_write( s, 2, i_last_pixel );
2415 bs_write( s, 2, 0 );
2416 bs_write( s, 1, 0 );
2417 bs_write( s, 1, 0 );
2418 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2421 else if( i_length > 2 )
2423 bs_write( s, 2, 0 );
2424 if( i_length <= 10 )
2426 bs_write( s, 1, 1 );
2427 bs_write( s, 3, i_length - 3 );
2428 bs_write( s, 2, i_last_pixel );
2432 bs_write( s, 1, 0 );
2433 bs_write( s, 1, 0 );
2435 if( i_length <= 27 )
2437 bs_write( s, 2, 2 );
2438 bs_write( s, 4, i_length - 12 );
2439 bs_write( s, 2, i_last_pixel );
2443 bs_write( s, 2, 3 );
2444 bs_write( s, 8, i_length - 29 );
2445 bs_write( s, 2, i_last_pixel );
2450 if( i == p_region->fmt.i_visible_width ) break;
2452 i_last_pixel = p_data[i];
2457 bs_write( s, 2, 0 );
2458 bs_write( s, 1, 0 );
2459 bs_write( s, 1, 0 );
2460 bs_write( s, 2, 0 );
2466 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2467 subpicture_region_t *p_region,
2470 unsigned int i, i_length = 0;
2471 int i_pitch = p_region->picture.p->i_pitch;
2472 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2473 int i_last_pixel = p_data[0];
2475 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2477 if( i != p_region->fmt.i_visible_width &&
2478 p_data[i] == i_last_pixel && i_length != 280 )
2484 if( ( i_length == 1 ) ||
2485 ( ( i_length == 3 ) && i_last_pixel ) ||
2488 /* 4bit/pixel code */
2490 bs_write( s, 4, i_last_pixel );
2493 bs_write( s, 4, 0 );
2494 bs_write( s, 1, 1 );
2495 bs_write( s, 1, 1 );
2496 bs_write( s, 2, 0 ); /* pseudo color 0 */
2505 bs_write( s, 4, i_last_pixel );
2506 bs_write( s, 4, i_last_pixel );
2510 bs_write( s, 4, 0 );
2511 bs_write( s, 1, 1 );
2512 bs_write( s, 1, 1 );
2513 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2516 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2518 bs_write( s, 4, 0 );
2519 bs_write( s, 1, 0 );
2520 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2522 else if( i_length > 2 )
2524 bs_write( s, 4, 0 );
2525 bs_write( s, 1, 1 );
2529 bs_write( s, 1, 0 );
2530 bs_write( s, 2, i_length - 4 );
2531 bs_write( s, 4, i_last_pixel );
2535 bs_write( s, 1, 1 );
2537 if( i_length <= 24 )
2539 bs_write( s, 2, 2 );
2540 bs_write( s, 4, i_length - 9 );
2541 bs_write( s, 4, i_last_pixel );
2545 bs_write( s, 2, 3 );
2546 bs_write( s, 8, i_length - 25 );
2547 bs_write( s, 4, i_last_pixel );
2552 if( i == p_region->fmt.i_visible_width ) break;
2554 i_last_pixel = p_data[i];
2559 bs_write( s, 8, 0 );
2565 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2566 subpicture_region_t *p_region,
2569 unsigned int i, i_length = 0;
2570 int i_pitch = p_region->picture.p->i_pitch;
2571 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2572 int i_last_pixel = p_data[0];
2574 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2576 if( ( i != p_region->fmt.i_visible_width ) &&
2577 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2583 if( ( i_length == 1 ) && i_last_pixel )
2585 /* 8bit/pixel code */
2586 bs_write( s, 8, i_last_pixel );
2588 else if( ( i_length == 2 ) && i_last_pixel )
2590 /* 8bit/pixel code */
2591 bs_write( s, 8, i_last_pixel );
2592 bs_write( s, 8, i_last_pixel );
2594 else if( i_length <= 127 )
2596 bs_write( s, 8, 0 );
2600 bs_write( s, 1, 0 );
2601 bs_write( s, 7, i_length ); /* pseudo color 0 */
2605 bs_write( s, 1, 1 );
2606 bs_write( s, 7, i_length );
2607 bs_write( s, 8, i_last_pixel );
2611 if( i == p_region->fmt.i_visible_width ) break;
2613 i_last_pixel = p_data[i];
2618 bs_write( s, 8, 0 );
2619 bs_write( s, 8, 0 );