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 /* this is very small, so keep forever */
238 dvbsub_display_t display;
239 dvbsub_clut_t default_clut;
243 /* List of different SEGMENT TYPES */
244 /* According to EN 300-743, table 2 */
245 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
246 #define DVBSUB_ST_REGION_COMPOSITION 0x11
247 #define DVBSUB_ST_CLUT_DEFINITION 0x12
248 #define DVBSUB_ST_OBJECT_DATA 0x13
249 #define DVBSUB_ST_DISPLAY_DEFINITION 0x14
250 #define DVBSUB_ST_ENDOFDISPLAY 0x80
251 #define DVBSUB_ST_STUFFING 0xff
252 /* List of different OBJECT TYPES */
253 /* According to EN 300-743, table 6 */
254 #define DVBSUB_OT_BASIC_BITMAP 0x00
255 #define DVBSUB_OT_BASIC_CHAR 0x01
256 #define DVBSUB_OT_COMPOSITE_STRING 0x02
257 /* Pixel DATA TYPES */
258 /* According to EN 300-743, table 9 */
259 #define DVBSUB_DT_2BP_CODE_STRING 0x10
260 #define DVBSUB_DT_4BP_CODE_STRING 0x11
261 #define DVBSUB_DT_8BP_CODE_STRING 0x12
262 #define DVBSUB_DT_24_TABLE_DATA 0x20
263 #define DVBSUB_DT_28_TABLE_DATA 0x21
264 #define DVBSUB_DT_48_TABLE_DATA 0x22
265 #define DVBSUB_DT_END_LINE 0xf0
266 /* List of different Page Composition Segment state */
267 /* According to EN 300-743, 7.2.1 table 3 */
268 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
269 #define DVBSUB_PCS_STATE_CHANGE 0x02
271 /*****************************************************************************
273 *****************************************************************************/
274 static void decode_segment( decoder_t *, bs_t * );
275 static void decode_page_composition( decoder_t *, bs_t * );
276 static void decode_region_composition( decoder_t *, bs_t * );
277 static void decode_object( decoder_t *, bs_t * );
278 static void decode_display_definition( decoder_t *, bs_t * );
279 static void decode_clut( decoder_t *, bs_t * );
280 static void free_all( decoder_t * );
282 static void default_clut_init( decoder_t * );
283 static void default_dds_init( decoder_t * );
285 static subpicture_t *render( decoder_t * );
287 /*****************************************************************************
288 * Open: probe the decoder and return score
289 *****************************************************************************
290 * Tries to launch a decoder and return score so that the interface is able
292 *****************************************************************************/
293 static int Open( vlc_object_t *p_this )
295 decoder_t *p_dec = (decoder_t *) p_this;
296 decoder_sys_t *p_sys;
300 if( p_dec->fmt_in.i_codec != VLC_CODEC_DVBS )
305 p_dec->pf_decode_sub = Decode;
306 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
309 memset( p_sys, 0, sizeof(decoder_sys_t) );
311 p_sys->i_pts = (mtime_t) 0;
312 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
313 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
315 p_sys->p_regions = NULL;
316 p_sys->p_cluts = NULL;
317 p_sys->p_page = NULL;
319 /* configure for SD res in case DDS is not present */
320 default_dds_init( p_dec );
322 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
323 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
324 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
325 p_sys->i_spu_position = val.i_int;
326 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
327 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
328 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
330 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
331 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
332 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
335 /* Check if subpicture position was overridden */
336 p_sys->b_absolute = true;
337 p_sys->i_spu_x = p_sys->i_spu_y = 0;
339 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
341 p_sys->b_absolute = true;
342 p_sys->i_spu_x = i_posx;
343 p_sys->i_spu_y = i_posy;
346 p_dec->fmt_out.i_cat = SPU_ES;
347 p_dec->fmt_out.i_codec = 0;
349 default_clut_init( p_dec );
354 /*****************************************************************************
356 *****************************************************************************/
357 static void Close( vlc_object_t *p_this )
359 decoder_t *p_dec = (decoder_t*) p_this;
360 decoder_sys_t *p_sys = p_dec->p_sys;
362 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
363 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
364 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
370 /*****************************************************************************
372 *****************************************************************************/
373 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
375 decoder_sys_t *p_sys = p_dec->p_sys;
377 subpicture_t *p_spu = NULL;
379 if( ( pp_block == NULL ) || ( *pp_block == NULL ) ) return NULL;
383 /* configure for SD res in case DDS is not present */
384 /* a change of PTS is a good indication we must get a new DDS */
385 if (p_sys->i_pts != p_block->i_pts)
386 default_dds_init( p_dec );
388 p_sys->i_pts = p_block->i_pts;
389 if( p_sys->i_pts <= 0 )
392 /* Some DVB channels send stuffing segments in non-dated packets so
393 * don't complain too loudly. */
394 msg_Warn( p_dec, "non dated subtitle" );
396 block_Release( p_block );
400 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
402 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
404 msg_Dbg( p_dec, "invalid data identifier" );
405 block_Release( p_block );
409 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
411 msg_Dbg( p_dec, "invalid subtitle stream id" );
412 block_Release( p_block );
417 msg_Dbg( p_dec, "subtitle packet received: %"PRId64, p_sys->i_pts );
420 p_sys->b_page = false;
421 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
423 decode_segment( p_dec, &p_sys->bs );
426 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
428 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
429 block_Release( p_block );
433 /* Check if the page is to be displayed */
434 if( p_sys->p_page && p_sys->b_page )
435 p_spu = render( p_dec );
437 block_Release( p_block );
442 /* following functions are local */
444 /*****************************************************************************
445 * default_clut_init: default clut as defined in EN 300-743 section 10
446 *****************************************************************************/
447 static void default_clut_init( decoder_t *p_dec )
449 decoder_sys_t *p_sys = p_dec->p_sys;
452 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
453 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
454 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
457 for( i = 0; i < 4; i++ )
459 uint8_t R = 0, G = 0, B = 0, T = 0;
461 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
462 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
463 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
464 else R = G = B = 0x7F;
466 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
467 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
468 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
469 p_sys->default_clut.c_2b[i].T = T;
472 /* 16 entries CLUT */
473 for( i = 0; i < 16; i++ )
475 uint8_t R = 0, G = 0, B = 0, T = 0;
479 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
485 R = (i & 0x1) ? 0xFF : 0;
486 G = (i & 0x2) ? 0xFF : 0;
487 B = (i & 0x4) ? 0xFF : 0;
492 R = (i & 0x1) ? 0x7F : 0;
493 G = (i & 0x2) ? 0x7F : 0;
494 B = (i & 0x4) ? 0x7F : 0;
497 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
498 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
499 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
500 p_sys->default_clut.c_4b[i].T = T;
503 /* 256 entries CLUT */
504 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
507 static void decode_segment( decoder_t *p_dec, bs_t *s )
509 decoder_sys_t *p_sys = p_dec->p_sys;
514 /* sync_byte (already checked) */
518 i_type = bs_read( s, 8 );
521 i_page_id = bs_read( s, 16 );
524 i_size = bs_show( s, 16 );
526 if( ( i_page_id != p_sys->i_id ) &&
527 ( i_page_id != p_sys->i_ancillary_id ) )
530 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
531 i_page_id, p_sys->i_id );
533 bs_skip( s, 8 * ( 2 + i_size ) );
537 if( ( p_sys->i_ancillary_id != p_sys->i_id ) &&
538 ( i_type == DVBSUB_ST_PAGE_COMPOSITION ) &&
539 ( i_page_id == p_sys->i_ancillary_id ) )
542 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
544 bs_skip( s, 8 * ( 2 + i_size ) );
549 if( i_page_id == p_sys->i_id )
550 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
552 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
557 case DVBSUB_ST_PAGE_COMPOSITION:
559 msg_Dbg( p_dec, "decode_page_composition" );
561 decode_page_composition( p_dec, s );
564 case DVBSUB_ST_REGION_COMPOSITION:
566 msg_Dbg( p_dec, "decode_region_composition" );
568 decode_region_composition( p_dec, s );
571 case DVBSUB_ST_CLUT_DEFINITION:
573 msg_Dbg( p_dec, "decode_clut" );
575 decode_clut( p_dec, s );
578 case DVBSUB_ST_OBJECT_DATA:
580 msg_Dbg( p_dec, "decode_object" );
582 decode_object( p_dec, s );
585 case DVBSUB_ST_DISPLAY_DEFINITION:
587 msg_Dbg( p_dec, "decode_display_definition" );
589 decode_display_definition( p_dec, s );
592 case DVBSUB_ST_ENDOFDISPLAY:
594 msg_Dbg( p_dec, "end of display" );
596 bs_skip( s, 8 * ( 2 + i_size ) );
599 case DVBSUB_ST_STUFFING:
601 msg_Dbg( p_dec, "skip stuffing" );
603 bs_skip( s, 8 * ( 2 + i_size ) );
607 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
608 bs_skip( s, 8 * ( 2 + i_size ) );
613 static void decode_clut( decoder_t *p_dec, bs_t *s )
615 decoder_sys_t *p_sys = p_dec->p_sys;
616 uint16_t i_segment_length;
617 uint16_t i_processed_length;
618 dvbsub_clut_t *p_clut, *p_next;
621 i_segment_length = bs_read( s, 16 );
622 i_id = bs_read( s, 8 );
623 i_version = bs_read( s, 4 );
625 /* Check if we already have this clut */
626 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
628 if( p_clut->i_id == i_id ) break;
631 /* Check version number */
632 if( p_clut && ( p_clut->i_version == i_version ) )
635 bs_skip( s, 8 * i_segment_length - 12 );
642 msg_Dbg( p_dec, "new clut: %i", i_id );
644 p_clut = malloc( sizeof( dvbsub_clut_t ) );
647 p_clut->p_next = p_sys->p_cluts;
648 p_sys->p_cluts = p_clut;
651 /* Initialize to default clut */
652 p_next = p_clut->p_next;
653 *p_clut = p_sys->default_clut;
654 p_clut->p_next = p_next;
656 /* We don't have this version of the CLUT: Parse it */
657 p_clut->i_version = i_version;
659 bs_skip( s, 4 ); /* Reserved bits */
660 i_processed_length = 2;
661 while( i_processed_length < i_segment_length )
663 uint8_t y, cb, cr, t;
667 i_id = bs_read( s, 8 );
668 i_type = bs_read( s, 3 );
672 if( bs_read( s, 1 ) )
675 cr = bs_read( s, 8 );
676 cb = bs_read( s, 8 );
678 i_processed_length += 6;
682 y = bs_read( s, 6 ) << 2;
683 cr = bs_read( s, 4 ) << 4;
684 cb = bs_read( s, 4 ) << 4;
685 t = bs_read( s, 2 ) << 6;
686 i_processed_length += 4;
689 /* We are not entirely compliant here as full transparency is indicated
690 * with a luma value of zero, not a transparency value of 0xff
691 * (full transparency would actually be 0xff + 1). */
698 /* According to EN 300-743 section 7.2.3 note 1, type should
699 * not have more than 1 bit set to one, but some streams don't
700 * respect this note. */
701 if( ( i_type & 0x04 ) && ( i_id < 4 ) )
703 p_clut->c_2b[i_id].Y = y;
704 p_clut->c_2b[i_id].Cr = cr;
705 p_clut->c_2b[i_id].Cb = cb;
706 p_clut->c_2b[i_id].T = t;
708 if( ( i_type & 0x02 ) && ( i_id < 16 ) )
710 p_clut->c_4b[i_id].Y = y;
711 p_clut->c_4b[i_id].Cr = cr;
712 p_clut->c_4b[i_id].Cb = cb;
713 p_clut->c_4b[i_id].T = t;
717 p_clut->c_8b[i_id].Y = y;
718 p_clut->c_8b[i_id].Cr = cr;
719 p_clut->c_8b[i_id].Cb = cb;
720 p_clut->c_8b[i_id].T = t;
725 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
727 decoder_sys_t *p_sys = p_dec->p_sys;
728 int i_version, i_state, i_segment_length, i_timeout, i;
730 /* A page is composed by 0 or more region */
731 i_segment_length = bs_read( s, 16 );
732 i_timeout = bs_read( s, 8 );
733 i_version = bs_read( s, 4 );
734 i_state = bs_read( s, 2 );
735 bs_skip( s, 2 ); /* Reserved */
737 if( i_state == DVBSUB_PCS_STATE_CHANGE )
739 /* End of an epoch, reset decoder buffer */
741 msg_Dbg( p_dec, "page composition mode change" );
745 else if( !p_sys->p_page && ( i_state != DVBSUB_PCS_STATE_ACQUISITION ) &&
746 ( i_state != DVBSUB_PCS_STATE_CHANGE ) )
748 /* Not a full PCS, we need to wait for one */
749 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
752 /* Try to start decoding even without an acquisition page */
753 bs_skip( s, 8 * (i_segment_length - 2) );
759 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
760 msg_Dbg( p_dec, "acquisition page composition" );
763 /* Check version number */
764 if( p_sys->p_page && ( p_sys->p_page->i_version == i_version ) )
766 bs_skip( s, 8 * (i_segment_length - 2) );
769 else if( p_sys->p_page )
771 if( p_sys->p_page->i_region_defs )
772 free( p_sys->p_page->p_region_defs );
773 p_sys->p_page->p_region_defs = NULL;
774 p_sys->p_page->i_region_defs = 0;
780 msg_Dbg( p_dec, "new page" );
782 /* Allocate a new page */
783 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
788 p_sys->p_page->i_version = i_version;
789 p_sys->p_page->i_timeout = i_timeout;
790 p_sys->b_page = true;
792 /* Number of regions */
793 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
795 if( p_sys->p_page->i_region_defs == 0 ) return;
797 p_sys->p_page->p_region_defs =
798 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
799 if( p_sys->p_page->p_region_defs )
801 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
803 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
804 bs_skip( s, 8 ); /* Reserved */
805 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
806 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
809 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
810 i, p_sys->p_page->p_region_defs[i].i_x,
811 p_sys->p_page->p_region_defs[i].i_y );
817 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
819 decoder_sys_t *p_sys = p_dec->p_sys;
820 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
821 int i_segment_length, i_processed_length, i_id, i_version;
822 int i_width, i_height, i_level_comp, i_depth, i_clut;
823 int i_8_bg, i_4_bg, i_2_bg;
826 i_segment_length = bs_read( s, 16 );
827 i_id = bs_read( s, 8 );
828 i_version = bs_read( s, 4 );
830 /* Check if we already have this region */
831 for( p_region = p_sys->p_regions; p_region != NULL;
832 p_region = p_region->p_next )
834 pp_region = &p_region->p_next;
835 if( p_region->i_id == i_id ) break;
838 /* Check version number */
839 if( p_region && ( p_region->i_version == i_version ) )
841 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
848 msg_Dbg( p_dec, "new region: %i", i_id );
850 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
853 memset( p_region, 0, sizeof(dvbsub_region_t) );
854 p_region->p_object_defs = NULL;
855 p_region->p_pixbuf = NULL;
856 p_region->p_next = NULL;
859 /* Region attributes */
860 p_region->i_id = i_id;
861 p_region->i_version = i_version;
862 b_fill = bs_read( s, 1 );
863 bs_skip( s, 3 ); /* Reserved */
865 i_width = bs_read( s, 16 );
866 i_height = bs_read( s, 16 );
868 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
870 i_level_comp = bs_read( s, 3 );
871 i_depth = bs_read( s, 3 );
872 bs_skip( s, 2 ); /* Reserved */
873 i_clut = bs_read( s, 8 );
875 i_8_bg = bs_read( s, 8 );
876 i_4_bg = bs_read( s, 4 );
877 i_2_bg = bs_read( s, 2 );
878 bs_skip( s, 2 ); /* Reserved */
880 /* Free old object defs */
881 while( p_region->i_object_defs )
882 free( p_region->p_object_defs[--p_region->i_object_defs].psz_text );
884 free( p_region->p_object_defs );
885 p_region->p_object_defs = NULL;
887 /* Extra sanity checks */
888 if( ( p_region->i_width != i_width ) ||
889 ( p_region->i_height != i_height ) )
891 if( p_region->p_pixbuf )
893 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
894 p_region->i_width, p_region->i_height, i_width, i_height );
895 free( p_region->p_pixbuf );
898 p_region->p_pixbuf = malloc( i_height * i_width );
899 p_region->i_depth = 0;
902 if( p_region->i_depth &&
903 ( ( p_region->i_depth != i_depth ) ||
904 ( p_region->i_level_comp != i_level_comp ) ||
905 ( p_region->i_clut != i_clut) ) )
907 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
910 /* Erase background of region */
913 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
914 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
915 memset( p_region->p_pixbuf, i_background, i_width * i_height );
918 p_region->i_width = i_width;
919 p_region->i_height = i_height;
920 p_region->i_level_comp = i_level_comp;
921 p_region->i_depth = i_depth;
922 p_region->i_clut = i_clut;
924 /* List of objects in the region */
925 i_processed_length = 10;
926 while( i_processed_length < i_segment_length )
928 dvbsub_objectdef_t *p_obj;
930 /* We create a new object */
931 p_region->i_object_defs++;
932 p_region->p_object_defs =
933 realloc( p_region->p_object_defs,
934 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
936 /* We parse object properties */
937 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
938 p_obj->i_id = bs_read( s, 16 );
939 p_obj->i_type = bs_read( s, 2 );
940 bs_skip( s, 2 ); /* Provider */
941 p_obj->i_x = bs_read( s, 12 );
942 bs_skip( s, 4 ); /* Reserved */
943 p_obj->i_y = bs_read( s, 12 );
944 p_obj->psz_text = NULL;
946 i_processed_length += 6;
948 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
949 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
951 p_obj->i_fg_pc = bs_read( s, 8 );
952 p_obj->i_bg_pc = bs_read( s, 8 );
953 i_processed_length += 2;
958 /* ETSI 300 743 [7.2.1] */
959 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
961 decoder_sys_t *p_sys = p_dec->p_sys;
962 uint16_t i_segment_length;
963 uint16_t i_processed_length = 40;
966 i_segment_length = bs_read( s, 16 );
967 i_version = bs_read( s, 4 );
969 /* Check version number */
970 if( p_sys->display.i_version == i_version )
972 /* The definition did not change */
973 bs_skip( s, 8*i_segment_length - 4 );
978 msg_Dbg( p_dec, "new display definition: %i", i_version );
981 /* We don't have this version of the display definition: Parse it */
982 p_sys->display.i_version = i_version;
983 p_sys->display.b_windowed = bs_read( s, 1 );
984 bs_skip( s, 3 ); /* Reserved bits */
985 p_sys->display.i_width = bs_read( s, 16 )+1;
986 p_sys->display.i_height = bs_read( s, 16 )+1;
988 if( p_sys->display.b_windowed )
991 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
993 /* Coordinates are measured from the top left corner */
994 p_sys->display.i_x = bs_read( s, 16 );
995 p_sys->display.i_max_x = bs_read( s, 16 );
996 p_sys->display.i_y = bs_read( s, 16 );
997 p_sys->display.i_max_y = bs_read( s, 16 );
998 i_processed_length += 64;
1001 if( i_processed_length != i_segment_length*8 )
1003 msg_Err( p_dec, "processed length %d != segment length %d",
1004 i_processed_length, i_segment_length );
1008 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1009 p_sys->display.i_version, p_sys->display.i_width, p_sys->display.i_height );
1010 if( p_sys->display.b_windowed )
1011 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1012 p_sys->display.i_x, p_sys->display.i_max_x, p_sys->display.i_y, p_sys->display.i_max_y );
1016 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1018 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1019 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1020 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1022 static void decode_object( decoder_t *p_dec, bs_t *s )
1024 decoder_sys_t *p_sys = p_dec->p_sys;
1025 dvbsub_region_t *p_region;
1026 int i_segment_length, i_coding_method, i_version, i_id, i;
1027 bool b_non_modify_color;
1029 /* ETSI 300-743 paragraph 7.2.4
1030 * sync_byte, segment_type and page_id have already been processed.
1032 i_segment_length = bs_read( s, 16 );
1033 i_id = bs_read( s, 16 );
1034 i_version = bs_read( s, 4 );
1035 i_coding_method = bs_read( s, 2 );
1037 if( i_coding_method > 1 )
1039 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1040 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1044 /* Check if the object needs to be rendered in at least one
1046 for( p_region = p_sys->p_regions; p_region != NULL;
1047 p_region = p_region->p_next )
1049 for( i = 0; i < p_region->i_object_defs; i++ )
1050 if( p_region->p_object_defs[i].i_id == i_id ) break;
1052 if( i != p_region->i_object_defs ) break;
1056 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1061 msg_Dbg( p_dec, "new object: %i", i_id );
1064 b_non_modify_color = bs_read( s, 1 );
1065 bs_skip( s, 1 ); /* Reserved */
1067 if( i_coding_method == 0x00 )
1069 int i_topfield, i_bottomfield;
1070 uint8_t *p_topfield, *p_bottomfield;
1072 i_topfield = bs_read( s, 16 );
1073 i_bottomfield = bs_read( s, 16 );
1074 p_topfield = s->p_start + bs_pos( s ) / 8;
1075 p_bottomfield = p_topfield + i_topfield;
1077 bs_skip( s, 8 * (i_segment_length - 7) );
1080 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1081 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1083 msg_Dbg( p_dec, "corrupted object data" );
1087 for( p_region = p_sys->p_regions; p_region != NULL;
1088 p_region = p_region->p_next )
1090 for( i = 0; i < p_region->i_object_defs; i++ )
1092 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1094 dvbsub_render_pdata( p_dec, p_region,
1095 p_region->p_object_defs[i].i_x,
1096 p_region->p_object_defs[i].i_y,
1097 p_topfield, i_topfield );
1101 dvbsub_render_pdata( p_dec, p_region,
1102 p_region->p_object_defs[i].i_x,
1103 p_region->p_object_defs[i].i_y + 1,
1104 p_bottomfield, i_bottomfield );
1108 /* Duplicate the top field */
1109 dvbsub_render_pdata( p_dec, p_region,
1110 p_region->p_object_defs[i].i_x,
1111 p_region->p_object_defs[i].i_y + 1,
1112 p_topfield, i_topfield );
1119 /* DVB subtitling as characters */
1120 int i_number_of_codes = bs_read( s, 8 );
1121 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1124 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1125 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1127 msg_Dbg( p_dec, "corrupted object data" );
1131 for( p_region = p_sys->p_regions; p_region != NULL;
1132 p_region = p_region->p_next )
1134 for( i = 0; i < p_region->i_object_defs; i++ )
1138 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1140 p_region->p_object_defs[i].psz_text =
1141 realloc( p_region->p_object_defs[i].psz_text,
1142 i_number_of_codes + 1 );
1144 /* FIXME 16bits -> char ??? See Preamble */
1145 for( j = 0; j < i_number_of_codes; j++ )
1147 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1149 /* Null terminate the string */
1150 p_region->p_object_defs[i].psz_text[j] = 0;
1156 msg_Dbg( p_dec, "end object: %i", i_id );
1160 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1162 uint8_t *p_field, int i_field )
1169 if( !p_region->p_pixbuf )
1171 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1174 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1175 i_x >= p_region->i_width )
1177 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1181 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1182 bs_init( &bs, p_field, i_field );
1184 while( !bs_eof( &bs ) )
1187 if( i_y >= p_region->i_height ) return;
1189 switch( bs_read( &bs, 8 ) )
1192 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1197 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1202 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1209 /* We don't use map tables */
1212 case 0xf0: /* End of line code */
1213 p_pixbuf += 2*p_region->i_width;
1214 i_offset = 0; i_y += 2;
1220 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1222 bool b_stop = false;
1224 while( !b_stop && !bs_eof( s ) )
1226 int i_count = 0, i_color = 0;
1228 i_color = bs_read( s, 2 );
1229 if( i_color != 0x00 )
1235 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1237 i_count = 3 + bs_read( s, 3 );
1238 i_color = bs_read( s, 2 );
1242 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1244 switch( bs_read( s, 2 ) ) //Switch3
1253 i_count = 12 + bs_read( s, 4 );
1254 i_color = bs_read( s, 2 );
1257 i_count = 29 + bs_read( s, 8 );
1258 i_color = bs_read( s, 2 );
1266 /* 1 pixel color 0 */
1272 if( !i_count ) continue;
1275 if( ( i_count + *pi_off ) > i_width ) break;
1277 if( i_count == 1 ) p[*pi_off] = i_color;
1278 else memset( ( p + *pi_off ), i_color, i_count );
1280 (*pi_off) += i_count;
1286 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1288 bool b_stop = false;
1290 while( !b_stop && !bs_eof( s ) )
1292 int i_count = 0, i_color = 0;
1294 i_color = bs_read( s, 4 );
1295 if( i_color != 0x00 )
1302 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1304 if( bs_show( s, 3 ) != 0x00 )
1306 i_count = 2 + bs_read( s, 3 );
1316 if( bs_read( s, 1 ) == 0x00) //Switch2
1318 i_count = 4 + bs_read( s, 2 );
1319 i_color = bs_read( s, 4 );
1323 switch ( bs_read( s, 2 ) ) //Switch3
1332 i_count = 9 + bs_read( s, 4 );
1333 i_color = bs_read( s, 4 );
1336 i_count= 25 + bs_read( s, 8 );
1337 i_color = bs_read( s, 4 );
1344 if( !i_count ) continue;
1347 if( ( i_count + *pi_off ) > i_width ) break;
1349 if( i_count == 1 ) p[*pi_off] = i_color;
1350 else memset( ( p + *pi_off ), i_color, i_count );
1352 (*pi_off) += i_count;
1358 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1360 bool b_stop = false;
1362 while( !b_stop && !bs_eof( s ) )
1364 int i_count = 0, i_color = 0;
1366 i_color = bs_read( s, 8 );
1367 if( i_color != 0x00 )
1374 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1376 if( bs_show( s, 7 ) != 0x00 )
1378 i_count = bs_read( s, 7 );
1388 i_count = bs_read( s, 7 );
1389 i_color = bs_read( s, 8 );
1393 if( !i_count ) continue;
1396 if( ( i_count + *pi_off ) > i_width ) break;
1398 if( i_count == 1 ) p[*pi_off] = i_color;
1399 else memset( ( p + *pi_off ), i_color, i_count );
1401 (*pi_off) += i_count;
1407 static void free_all( decoder_t *p_dec )
1409 decoder_sys_t *p_sys = p_dec->p_sys;
1410 dvbsub_region_t *p_reg, *p_reg_next;
1411 dvbsub_clut_t *p_clut, *p_clut_next;
1413 /*free( p_sys->p_display ); No longer malloced */
1415 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1417 p_clut_next = p_clut->p_next;
1420 p_sys->p_cluts = NULL;
1422 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1426 p_reg_next = p_reg->p_next;
1427 for( i = 0; i < p_reg->i_object_defs; i++ )
1428 free( p_reg->p_object_defs[i].psz_text );
1429 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1430 free( p_reg->p_pixbuf );
1433 p_sys->p_regions = NULL;
1437 if( p_sys->p_page->i_region_defs )
1438 free( p_sys->p_page->p_region_defs );
1439 free( p_sys->p_page );
1441 p_sys->p_page = NULL;
1444 static subpicture_t *render( decoder_t *p_dec )
1446 decoder_sys_t *p_sys = p_dec->p_sys;
1447 subpicture_t *p_spu;
1448 subpicture_region_t **pp_spu_region;
1449 int i, j, i_timeout = 0;
1453 /* Allocate the subpicture internal data. */
1454 p_spu = decoder_NewSubpicture( p_dec );
1458 p_spu->b_absolute = p_sys->b_absolute;
1459 /* Set the pf_render callback */
1460 p_spu->i_start = (mtime_t) p_sys->i_pts;
1461 //p_spu->i_stop = (mtime_t) 0;
1462 p_spu->b_ephemer = true;
1463 //p_spu->b_fade = true;
1464 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1466 /* Correct positioning of SPU */
1467 i_base_x = p_sys->i_spu_x;
1468 i_base_y = p_sys->i_spu_y;
1469 p_spu->i_original_picture_width = 720;
1470 p_spu->i_original_picture_height = 576;
1472 p_spu->i_original_picture_width = p_sys->display.i_width;
1473 p_spu->i_original_picture_height = p_sys->display.i_height;
1475 if( p_sys->display.b_windowed )
1477 /* TODO: check that this actually works */
1478 p_spu->i_original_picture_width = p_sys->display.i_max_x - p_sys->display.i_x;
1479 p_spu->i_original_picture_height = p_sys->display.i_max_y - p_sys->display.i_y;
1480 i_base_x += p_sys->display.i_x;
1481 i_base_y += p_sys->display.i_y;
1484 pp_spu_region = &p_spu->p_region;
1486 /* Loop on region definitions */
1489 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1492 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1494 dvbsub_region_t *p_region;
1495 dvbsub_regiondef_t *p_regiondef;
1496 dvbsub_clut_t *p_clut;
1497 dvbsub_color_t *p_color;
1498 subpicture_region_t *p_spu_region;
1499 uint8_t *p_src, *p_dst;
1501 video_palette_t palette;
1504 i_timeout = p_sys->p_page->i_timeout;
1506 p_regiondef = &p_sys->p_page->p_region_defs[i];
1509 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1510 p_regiondef->i_x, p_regiondef->i_y );
1513 /* Find associated region */
1514 for( p_region = p_sys->p_regions; p_region != NULL;
1515 p_region = p_region->p_next )
1517 if( p_regiondef->i_id == p_region->i_id ) break;
1522 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1526 /* Find associated CLUT */
1527 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1529 if( p_region->i_clut == p_clut->i_id ) break;
1533 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1537 /* FIXME: don't create a subpicture region with VLC CODEC YUVP
1538 * when it actually is a TEXT region */
1540 /* Create new SPU region */
1541 memset( &fmt, 0, sizeof(video_format_t) );
1542 fmt.i_chroma = VLC_CODEC_YUVP;
1543 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1544 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1545 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1546 fmt.i_x_offset = fmt.i_y_offset = 0;
1547 fmt.p_palette = &palette;
1548 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1549 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1550 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1551 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1552 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1554 fmt.p_palette->palette[j][0] = p_color[j].Y;
1555 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1556 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1557 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1560 p_spu_region = subpicture_region_New( &fmt );
1563 msg_Err( p_dec, "cannot allocate SPU region" );
1566 p_spu_region->i_x = i_base_x + p_regiondef->i_x;
1567 p_spu_region->i_y = i_base_y + p_regiondef->i_y;
1568 p_spu_region->i_align = p_sys->i_spu_position;
1569 *pp_spu_region = p_spu_region;
1570 pp_spu_region = &p_spu_region->p_next;
1572 p_src = p_region->p_pixbuf;
1573 p_dst = p_spu_region->p_picture->Y_PIXELS;
1574 i_pitch = p_spu_region->p_picture->Y_PITCH;
1576 /* Copy pixel buffer */
1577 for( j = 0; j < p_region->i_height; j++ )
1579 memcpy( p_dst, p_src, p_region->i_width );
1580 p_src += p_region->i_width;
1584 /* Check subtitles encoded as strings of characters
1585 * (since there are not rendered in the pixbuffer) */
1586 for( j = 0; j < p_region->i_object_defs; j++ )
1588 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1590 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1593 /* Create new SPU region */
1594 memset( &fmt, 0, sizeof(video_format_t) );
1595 fmt.i_chroma = VLC_CODEC_TEXT;
1596 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1597 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1598 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1599 fmt.i_x_offset = fmt.i_y_offset = 0;
1600 p_spu_region = subpicture_region_New( &fmt );
1603 msg_Err( p_dec, "cannot allocate SPU region" );
1607 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1608 p_spu_region->i_x = i_base_x + p_regiondef->i_x + p_object_def->i_x;
1609 p_spu_region->i_y = i_base_y + p_regiondef->i_y + p_object_def->i_y;
1610 p_spu_region->i_align = p_sys->i_spu_position;
1611 *pp_spu_region = p_spu_region;
1612 pp_spu_region = &p_spu_region->p_next;
1619 /*****************************************************************************
1620 * encoder_sys_t : encoder descriptor
1621 *****************************************************************************/
1622 typedef struct encoder_region_t
1629 struct encoder_sys_t
1631 unsigned int i_page_ver;
1632 unsigned int i_region_ver;
1633 unsigned int i_clut_ver;
1636 encoder_region_t *p_regions;
1640 /* subpicture positioning */
1645 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1646 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1647 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1648 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1650 /*****************************************************************************
1651 * OpenEncoder: probe the encoder and return score
1652 *****************************************************************************/
1653 static int OpenEncoder( vlc_object_t *p_this )
1655 encoder_t *p_enc = (encoder_t *)p_this;
1656 encoder_sys_t *p_sys;
1659 if( ( p_enc->fmt_out.i_codec != VLC_CODEC_DVBS ) &&
1662 return VLC_EGENERIC;
1665 /* Allocate the memory needed to store the decoder's structure */
1666 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1668 p_enc->p_sys = p_sys;
1670 p_enc->pf_encode_sub = Encode;
1671 p_enc->fmt_out.i_codec = VLC_CODEC_DVBS;
1672 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1674 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1676 p_sys->i_page_ver = 0;
1677 p_sys->i_region_ver = 0;
1678 p_sys->i_clut_ver = 0;
1679 p_sys->i_regions = 0;
1680 p_sys->p_regions = 0;
1682 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1683 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1684 p_sys->i_offset_x = val.i_int;
1685 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1686 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1687 p_sys->i_offset_y = val.i_int;
1692 /* FIXME: this routine is a hack to convert VLC_CODEC_YUVA
1693 * into VLC_CODEC_YUVP
1695 static subpicture_t *YuvaYuvp( subpicture_t *p_subpic )
1697 subpicture_region_t *p_region = NULL;
1699 if( !p_subpic ) return NULL;
1701 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1703 video_format_t *p_fmt = &p_region->fmt;
1704 int i = 0, j = 0, n = 0, p = 0;
1705 int i_max_entries = 256;
1707 #ifdef RANDOM_DITHERING
1708 int i_seed = 0xdeadbeef; /* random seed */
1712 int i_pixels = p_region->p_picture->p[0].i_visible_lines
1713 * p_region->p_picture->p[0].i_pitch;
1714 int i_iterator = p_region->p_picture->p[0].i_visible_lines * 3 / 4
1715 * p_region->p_picture->p[0].i_pitch
1716 + p_region->p_picture->p[0].i_pitch * 1 / 3;
1717 int i_tolerance = 0;
1720 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1722 p_fmt->i_chroma = VLC_CODEC_YUVP;
1723 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1724 if( !p_fmt->p_palette ) break;
1725 p_fmt->p_palette->i_entries = 0;
1727 /* Find best iterator using Euclide’s algorithm */
1728 for( ; i_iterator > 1 ; i_iterator-- )
1747 /* Count colors, build best palette */
1748 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1750 bool b_success = true;
1751 p_fmt->p_palette->i_entries = 0;
1753 for( i = 0; i < i_pixels ; )
1756 y = p_region->p_picture->p[0].p_pixels[i];
1757 u = p_region->p_picture->p[1].p_pixels[i];
1758 v = p_region->p_picture->p[2].p_pixels[i];
1759 a = p_region->p_picture->p[3].p_pixels[i];
1760 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1762 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1763 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1764 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1765 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1770 if( j == p_fmt->p_palette->i_entries )
1772 p_fmt->p_palette->palette[j][0] = y;
1773 p_fmt->p_palette->palette[j][1] = u;
1774 p_fmt->p_palette->palette[j][2] = v;
1775 p_fmt->p_palette->palette[j][3] = a;
1776 p_fmt->p_palette->i_entries++;
1778 if( p_fmt->p_palette->i_entries >= i_max_entries )
1797 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1800 #ifndef RANDOM_DITHERING
1801 pi_delta = malloc( ( p_region->p_picture->p[0].i_pitch + 1 )
1802 * sizeof(int) * 4 );
1803 for( i = 0; i < (p_region->p_picture->p[0].i_pitch + 1) * 4 ; i++ )
1809 /* Fill image with our new colours */
1810 for( p = 0; p < p_region->p_picture->p[0].i_visible_lines ; p++ )
1812 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1814 for( n = 0; n < p_region->p_picture->p[0].i_pitch ; n++ )
1816 int i_offset = p * p_region->p_picture->p[0].i_pitch + n;
1818 int i_mindist, i_best;
1820 y = (int)p_region->p_picture->p[0].p_pixels[i_offset];
1821 u = (int)p_region->p_picture->p[1].p_pixels[i_offset];
1822 v = (int)p_region->p_picture->p[2].p_pixels[i_offset];
1823 a = (int)p_region->p_picture->p[3].p_pixels[i_offset];
1825 /* Add dithering compensation */
1826 #ifdef RANDOM_DITHERING
1827 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1828 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1829 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1830 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1832 y += i_ydelta + pi_delta[ n * 4 ];
1833 u += i_udelta + pi_delta[ n * 4 + 1 ];
1834 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1835 a += i_adelta + pi_delta[ n * 4 + 3 ];
1838 /* Find best colour in palette */
1839 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1843 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1844 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1845 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1846 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1848 if( i_dist < i_mindist )
1855 /* Set pixel to best color */
1856 p_region->p_picture->p[0].p_pixels[i_offset] = i_best;
1858 /* Update dithering state */
1859 #ifdef RANDOM_DITHERING
1860 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1862 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1863 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1864 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1865 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1866 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1867 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1868 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1869 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1870 i_ydelta = i_ydelta * 5 / 8;
1871 i_udelta = i_udelta * 5 / 8;
1872 i_vdelta = i_vdelta * 5 / 8;
1873 i_adelta = i_adelta * 5 / 8;
1877 #ifndef RANDOM_DITHERING
1882 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1884 p_fmt->p_palette->palette[i][0] = 0;
1885 p_fmt->p_palette->palette[i][1] = 0;
1886 p_fmt->p_palette->palette[i][2] = 0;
1887 p_fmt->p_palette->palette[i][3] = 0;
1889 p_fmt->p_palette->i_entries = i_max_entries;
1891 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1897 /****************************************************************************
1898 * Encode: the whole thing
1899 ****************************************************************************/
1900 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1902 subpicture_t *p_temp = NULL;
1903 subpicture_region_t *p_region = NULL;
1904 bs_t bits, *s = &bits;
1907 if( !p_subpic || !p_subpic->p_region ) return NULL;
1909 /* FIXME: this is a hack to convert VLC_CODEC_YUVA into
1912 p_region = p_subpic->p_region;
1913 if( p_region->fmt.i_chroma == VLC_CODEC_YUVA )
1915 p_temp = YuvaYuvp( p_subpic );
1918 msg_Err( p_enc, "no picture in subpicture" );
1921 p_region = p_subpic->p_region;
1925 if( !p_region ) return NULL;
1927 if( ( p_region->fmt.i_chroma != VLC_CODEC_TEXT ) &&
1928 ( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) )
1931 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1932 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1933 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1937 if( p_region->fmt.p_palette )
1939 switch( p_region->fmt.p_palette->i_entries )
1947 msg_Err( p_enc, "subpicture palette (%d) not handled",
1948 p_region->fmt.p_palette->i_entries );
1955 msg_Dbg( p_enc, "encoding subpicture" );
1957 p_block = block_New( p_enc, 64000 );
1958 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1960 bs_write( s, 8, 0x20 ); /* Data identifier */
1961 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1963 encode_page_composition( p_enc, s, p_subpic );
1964 encode_region_composition( p_enc, s, p_subpic );
1965 encode_clut( p_enc, s, p_subpic );
1966 encode_object( p_enc, s, p_subpic );
1968 /* End of display */
1969 bs_write( s, 8, 0x0f ); /* Sync byte */
1970 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1971 bs_write( s, 16, 1 ); /* Page id */
1972 bs_write( s, 16, 0 ); /* Segment length */
1974 bs_write( s, 8, 0xff );/* End marker */
1975 p_block->i_buffer = bs_pos( s ) / 8;
1976 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1977 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
1979 block_t *p_block_stop;
1981 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1983 /* Send another (empty) subtitle to signal the end of display */
1984 p_block_stop = block_New( p_enc, 64000 );
1985 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1986 bs_write( s, 8, 0x20 ); /* Data identifier */
1987 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1988 encode_page_composition( p_enc, s, 0 );
1989 bs_write( s, 8, 0x0f ); /* Sync byte */
1990 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1991 bs_write( s, 16, 1 ); /* Page id */
1992 bs_write( s, 16, 0 ); /* Segment length */
1993 bs_write( s, 8, 0xff );/* End marker */
1994 p_block_stop->i_buffer = bs_pos( s ) / 8;
1995 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
1996 block_ChainAppend( &p_block, p_block_stop );
1997 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2000 msg_Dbg( p_enc, "subpicture encoded properly" );
2005 /*****************************************************************************
2006 * CloseEncoder: encoder destruction
2007 *****************************************************************************/
2008 static void CloseEncoder( vlc_object_t *p_this )
2010 encoder_t *p_enc = (encoder_t *)p_this;
2011 encoder_sys_t *p_sys = p_enc->p_sys;
2013 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2014 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2015 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2017 if( p_sys->i_regions ) free( p_sys->p_regions );
2021 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2022 subpicture_t *p_subpic )
2024 encoder_sys_t *p_sys = p_enc->p_sys;
2025 subpicture_region_t *p_region;
2026 bool b_mode_change = false;
2027 int i_regions, i_timeout;
2029 bs_write( s, 8, 0x0f ); /* Sync byte */
2030 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2031 bs_write( s, 16, 1 ); /* Page id */
2033 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2034 p_region; p_region = p_region->p_next, i_regions++ )
2036 if( i_regions >= p_sys->i_regions )
2038 encoder_region_t region;
2039 region.i_width = region.i_height = 0;
2041 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2042 (p_sys->i_regions + 1) );
2043 p_sys->p_regions[p_sys->i_regions++] = region;
2046 if( ( p_sys->p_regions[i_regions].i_width <
2047 (int)p_region->fmt.i_visible_width ) ||
2048 ( p_sys->p_regions[i_regions].i_width >
2049 (int)p_region->fmt.i_visible_width ) )
2051 b_mode_change = true;
2052 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2053 i_regions, p_sys->p_regions[i_regions].i_width,
2054 p_region->fmt.i_visible_width );
2055 p_sys->p_regions[i_regions].i_width =
2056 p_region->fmt.i_visible_width;
2058 if( p_sys->p_regions[i_regions].i_height <
2059 (int)p_region->fmt.i_visible_height )
2061 b_mode_change = true;
2062 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2063 i_regions, p_sys->p_regions[i_regions].i_height,
2064 p_region->fmt.i_visible_height );
2065 p_sys->p_regions[i_regions].i_height =
2066 p_region->fmt.i_visible_height;
2070 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2073 if( p_subpic && !p_subpic->b_ephemer &&
2074 ( p_subpic->i_stop > p_subpic->i_start ) )
2076 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2079 bs_write( s, 8, i_timeout ); /* Timeout */
2080 bs_write( s, 4, p_sys->i_page_ver++ );
2081 bs_write( s, 2, b_mode_change ?
2082 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2083 bs_write( s, 2, 0 ); /* Reserved */
2085 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2086 p_region; p_region = p_region->p_next, i_regions++ )
2088 bs_write( s, 8, i_regions );
2089 bs_write( s, 8, 0 ); /* Reserved */
2090 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2092 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2093 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2097 bs_write( s, 16, p_region->i_x );
2098 bs_write( s, 16, p_region->i_y );
2103 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2105 encoder_sys_t *p_sys = p_enc->p_sys;
2106 subpicture_region_t *p_region = p_subpic->p_region;
2107 video_palette_t *p_pal, pal;
2111 if( !p_region ) return;
2113 if( p_region->fmt.i_chroma == VLC_CODEC_YUVP )
2115 p_pal = p_region->fmt.p_palette;
2120 for( i = 0; i < 4; i++ )
2122 pal.palette[i][0] = 0;
2123 pal.palette[i][1] = 0;
2124 pal.palette[i][2] = 0;
2125 pal.palette[i][3] = 0;
2130 bs_write( s, 8, 0x0f ); /* Sync byte */
2131 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2132 bs_write( s, 16, 1 ); /* Page id */
2134 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2135 bs_write( s, 8, 1 ); /* Clut id */
2136 bs_write( s, 4, p_sys->i_clut_ver++ );
2137 bs_write( s, 4, 0 ); /* Reserved */
2139 for( i = 0; i < p_pal->i_entries; i++ )
2141 bs_write( s, 8, i ); /* Clut entry id */
2142 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2143 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2144 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2145 bs_write( s, 4, 0 ); /* Reserved */
2146 bs_write( s, 1, 1 ); /* Full range flag */
2147 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2148 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2149 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2150 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2151 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2155 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2156 subpicture_t *p_subpic )
2158 encoder_sys_t *p_sys = p_enc->p_sys;
2159 subpicture_region_t *p_region;
2162 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2163 p_region = p_region->p_next, i_region++ )
2165 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2167 ( p_region->fmt.i_chroma == VLC_CODEC_TEXT );
2171 video_palette_t *p_pal = p_region->fmt.p_palette;
2175 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2179 i_entries = p_pal->i_entries;
2180 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2182 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2184 if( !p_pal->palette[i_bg][3] ) break;
2188 bs_write( s, 8, 0x0f ); /* Sync byte */
2189 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2190 bs_write( s, 16, 1 ); /* Page id */
2192 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2193 bs_write( s, 8, i_region );
2194 bs_write( s, 4, p_sys->i_region_ver++ );
2196 /* Region attributes */
2197 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2198 bs_write( s, 3, 0 ); /* Reserved */
2199 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2200 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2201 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2202 bs_write( s, 3, i_depth ); /* Region depth */
2203 bs_write( s, 2, 0 ); /* Reserved */
2204 bs_write( s, 8, 1 ); /* Clut id */
2205 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2206 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2207 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2208 bs_write( s, 2, 0 ); /* Reserved */
2210 /* In our implementation we only have 1 object per region */
2211 bs_write( s, 16, i_region );
2212 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2213 bs_write( s, 2, 0 ); /* object provider flag */
2214 bs_write( s, 12, 0 );/* object horizontal position */
2215 bs_write( s, 4, 0 ); /* Reserved */
2216 bs_write( s, 12, 0 );/* object vertical position */
2220 bs_write( s, 8, 1 ); /* foreground pixel code */
2221 bs_write( s, 8, 0 ); /* background pixel code */
2226 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2227 subpicture_region_t *p_region,
2230 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2232 encoder_sys_t *p_sys = p_enc->p_sys;
2233 subpicture_region_t *p_region;
2236 int i_length_pos, i_update_pos, i_pixel_data_pos;
2238 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2239 p_region = p_region->p_next, i_region++ )
2241 bs_write( s, 8, 0x0f ); /* Sync byte */
2242 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2243 bs_write( s, 16, 1 ); /* Page id */
2245 i_length_pos = bs_pos( s );
2246 bs_write( s, 16, 0 ); /* Segment length */
2247 bs_write( s, 16, i_region ); /* Object id */
2248 bs_write( s, 4, p_sys->i_region_ver++ );
2250 /* object coding method */
2251 switch( p_region->fmt.i_chroma )
2253 case VLC_CODEC_YUVP:
2254 bs_write( s, 2, 0 );
2256 case VLC_CODEC_TEXT:
2257 bs_write( s, 2, 1 );
2260 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2264 bs_write( s, 1, 0 ); /* non modifying color flag */
2265 bs_write( s, 1, 0 ); /* Reserved */
2267 if( p_region->fmt.i_chroma == VLC_CODEC_TEXT )
2271 if( !p_region->psz_text ) continue;
2273 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2275 bs_write( s, 8, i_size ); /* number of characters in string */
2276 for( i = 0; i < i_size; i++ )
2278 bs_write( s, 16, p_region->psz_text[i] );
2281 /* Update segment length */
2282 SetWBE( &s->p_start[i_length_pos/8],
2283 (bs_pos(s) - i_length_pos)/8 -2 );
2287 /* Coding of a bitmap object */
2288 i_update_pos = bs_pos( s );
2289 bs_write( s, 16, 0 ); /* topfield data block length */
2290 bs_write( s, 16, 0 ); /* bottomfield data block length */
2293 i_pixel_data_pos = bs_pos( s );
2294 encode_pixel_data( p_enc, s, p_region, true );
2295 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2296 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2299 i_pixel_data_pos = bs_pos( s );
2300 encode_pixel_data( p_enc, s, p_region, false );
2301 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2302 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2304 /* Stuffing for word alignment */
2306 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2308 /* Update segment length */
2309 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2313 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2315 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2317 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2319 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2320 subpicture_region_t *p_region,
2323 unsigned int i_line;
2326 if( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) return;
2328 /* Encode line by line */
2329 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2332 switch( p_region->fmt.p_palette->i_entries )
2338 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2339 encode_pixel_line_2bp( s, p_region, i_line );
2343 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2344 encode_pixel_line_4bp( s, p_region, i_line );
2348 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2349 encode_pixel_line_8bp( s, p_region, i_line );
2353 msg_Err( p_enc, "subpicture palette (%i) not handled",
2354 p_region->fmt.p_palette->i_entries );
2358 bs_write( s, 8, 0xf0 ); /* End of object line code */
2362 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2365 unsigned int i, i_length = 0;
2366 int i_pitch = p_region->p_picture->p->i_pitch;
2367 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2368 int i_last_pixel = p_data[0];
2370 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2372 if( ( i != p_region->fmt.i_visible_width ) &&
2373 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2379 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2381 /* 2bit/pixel code */
2383 bs_write( s, 2, i_last_pixel );
2386 bs_write( s, 2, 0 );
2387 bs_write( s, 1, 0 );
2388 bs_write( s, 1, 1 ); /* pseudo color 0 */
2397 bs_write( s, 2, i_last_pixel );
2398 bs_write( s, 2, i_last_pixel );
2402 bs_write( s, 2, 0 );
2403 bs_write( s, 1, 0 );
2404 bs_write( s, 1, 0 );
2405 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2408 else if( i_length > 2 )
2410 bs_write( s, 2, 0 );
2411 if( i_length <= 10 )
2413 bs_write( s, 1, 1 );
2414 bs_write( s, 3, i_length - 3 );
2415 bs_write( s, 2, i_last_pixel );
2419 bs_write( s, 1, 0 );
2420 bs_write( s, 1, 0 );
2422 if( i_length <= 27 )
2424 bs_write( s, 2, 2 );
2425 bs_write( s, 4, i_length - 12 );
2426 bs_write( s, 2, i_last_pixel );
2430 bs_write( s, 2, 3 );
2431 bs_write( s, 8, i_length - 29 );
2432 bs_write( s, 2, i_last_pixel );
2437 if( i == p_region->fmt.i_visible_width ) break;
2439 i_last_pixel = p_data[i];
2444 bs_write( s, 2, 0 );
2445 bs_write( s, 1, 0 );
2446 bs_write( s, 1, 0 );
2447 bs_write( s, 2, 0 );
2453 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2456 unsigned int i, i_length = 0;
2457 int i_pitch = p_region->p_picture->p->i_pitch;
2458 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2459 int i_last_pixel = p_data[0];
2461 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2463 if( i != p_region->fmt.i_visible_width &&
2464 p_data[i] == i_last_pixel && i_length != 280 )
2470 if( ( i_length == 1 ) ||
2471 ( ( i_length == 3 ) && i_last_pixel ) ||
2474 /* 4bit/pixel code */
2476 bs_write( s, 4, i_last_pixel );
2479 bs_write( s, 4, 0 );
2480 bs_write( s, 1, 1 );
2481 bs_write( s, 1, 1 );
2482 bs_write( s, 2, 0 ); /* pseudo color 0 */
2491 bs_write( s, 4, i_last_pixel );
2492 bs_write( s, 4, i_last_pixel );
2496 bs_write( s, 4, 0 );
2497 bs_write( s, 1, 1 );
2498 bs_write( s, 1, 1 );
2499 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2502 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2504 bs_write( s, 4, 0 );
2505 bs_write( s, 1, 0 );
2506 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2508 else if( i_length > 2 )
2510 bs_write( s, 4, 0 );
2511 bs_write( s, 1, 1 );
2515 bs_write( s, 1, 0 );
2516 bs_write( s, 2, i_length - 4 );
2517 bs_write( s, 4, i_last_pixel );
2521 bs_write( s, 1, 1 );
2523 if( i_length <= 24 )
2525 bs_write( s, 2, 2 );
2526 bs_write( s, 4, i_length - 9 );
2527 bs_write( s, 4, i_last_pixel );
2531 bs_write( s, 2, 3 );
2532 bs_write( s, 8, i_length - 25 );
2533 bs_write( s, 4, i_last_pixel );
2538 if( i == p_region->fmt.i_visible_width ) break;
2540 i_last_pixel = p_data[i];
2545 bs_write( s, 8, 0 );
2551 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2554 unsigned int i, i_length = 0;
2555 int i_pitch = p_region->p_picture->p->i_pitch;
2556 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2557 int i_last_pixel = p_data[0];
2559 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2561 if( ( i != p_region->fmt.i_visible_width ) &&
2562 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2568 if( ( i_length == 1 ) && i_last_pixel )
2570 /* 8bit/pixel code */
2571 bs_write( s, 8, i_last_pixel );
2573 else if( ( i_length == 2 ) && i_last_pixel )
2575 /* 8bit/pixel code */
2576 bs_write( s, 8, i_last_pixel );
2577 bs_write( s, 8, i_last_pixel );
2579 else if( i_length <= 127 )
2581 bs_write( s, 8, 0 );
2585 bs_write( s, 1, 0 );
2586 bs_write( s, 7, i_length ); /* pseudo color 0 */
2590 bs_write( s, 1, 1 );
2591 bs_write( s, 7, i_length );
2592 bs_write( s, 8, i_last_pixel );
2596 if( i == p_region->fmt.i_visible_width ) break;
2598 i_last_pixel = p_data[i];
2603 bs_write( s, 8, 0 );
2604 bs_write( s, 8, 0 );
2611 static void default_dds_init( decoder_t * p_dec )
2613 decoder_sys_t *p_sys = p_dec->p_sys;
2615 /* see notes on DDS at the top of the file */
2617 /* configure for SD res in case DDS is not present */
2618 p_sys->display.i_version = 0xff; /* an invalid version so it's always different */
2619 p_sys->display.i_width = 720;
2620 p_sys->display.i_height = 576;
2621 p_sys->display.b_windowed = false;