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 VideoLAN (Centrale Réseaux) and its contributors
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>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
27 *****************************************************************************/
28 /*****************************************************************************
32 * DVB subtitles coded as strings of characters are not handled correctly.
33 * The character codes in the string should actually be indexes refering to a
34 * character table identified in the subtitle descriptor.
35 *****************************************************************************/
38 #include <vlc/decoder.h>
43 /* #define DEBUG_DVBSUB 1 */
45 #define POSX_TEXT N_("X coordinate of the subpicture")
46 #define POSX_LONGTEXT N_("You can reposition the subpicture by providing another value here." )
48 #define POSY_TEXT N_("Y coordinate of the subpicture")
49 #define POSY_LONGTEXT N_("You can reposition the subpicture by providing another value here." )
51 #define POS_TEXT N_("Subpicture position")
52 #define POS_LONGTEXT N_( \
53 "You can enforce the subpicture position on the video " \
54 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
55 "also use combinations of these values).")
57 #define ENC_POSX_TEXT N_("X coordinate of the encoded subpicture")
58 #define ENC_POSX_LONGTEXT N_("You can reposition the subpicture by providing another value here." )
60 #define ENC_POSY_TEXT N_("Y coordinate of encoded the subpicture")
61 #define ENC_POSY_LONGTEXT N_("You can reposition the subpicture by providing another value here." )
63 #define TIMEOUT_TEXT N_("Timeout of subpictures")
64 #define TIMEOUT_LONGTEXT N_( \
65 "Subpictures get a default timeout of 15 seconds added to their remaining time." \
66 "This will ensure that they are at least the specified time visible.")
68 static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
69 static 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 );
93 change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
94 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
95 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
97 # define ENC_CFG_PREFIX "sout-dvbsub-"
99 set_description( _("DVB subtitles encoder") );
100 set_capability( "encoder", 100 );
101 set_callbacks( OpenEncoder, CloseEncoder );
103 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, VLC_FALSE );
104 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, VLC_FALSE );
105 add_integer( ENC_CFG_PREFIX "timeout", 15, NULL, TIMEOUT_TEXT, TIMEOUT_LONGTEXT, VLC_FALSE );
108 static const char *ppsz_enc_options[] = { NULL };
110 /****************************************************************************
112 ****************************************************************************
113 * Those structures refer closely to the ETSI 300 743 Object model
114 ****************************************************************************/
116 /* The object definition gives the position of the object in a region */
117 typedef struct dvbsub_objectdef_s
125 char *psz_text; /* for string of characters objects */
127 } dvbsub_objectdef_t;
129 /* The entry in the palette CLUT */
140 typedef struct dvbsub_clut_s
144 dvbsub_color_t c_2b[4];
145 dvbsub_color_t c_4b[16];
146 dvbsub_color_t c_8b[256];
148 struct dvbsub_clut_s *p_next;
152 /* The Region is an aera on the image
153 * with a list of the object definitions associated and a CLUT */
154 typedef struct dvbsub_region_s
169 dvbsub_objectdef_t *p_object_defs;
171 struct dvbsub_region_s *p_next;
175 /* The object definition gives the position of the object in a region */
176 typedef struct dvbsub_regiondef_s
182 } dvbsub_regiondef_t;
184 /* The page defines the list of regions */
188 int i_timeout; /* in seconds */
193 dvbsub_regiondef_t *p_region_defs;
201 /* Decoder internal data */
206 vlc_bool_t b_absolute;
212 dvbsub_page_t *p_page;
213 dvbsub_region_t *p_regions;
214 dvbsub_clut_t *p_cluts;
215 dvbsub_clut_t default_clut;
219 /* List of different SEGMENT TYPES */
220 /* According to EN 300-743, table 2 */
221 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
222 #define DVBSUB_ST_REGION_COMPOSITION 0x11
223 #define DVBSUB_ST_CLUT_DEFINITION 0x12
224 #define DVBSUB_ST_OBJECT_DATA 0x13
225 #define DVBSUB_ST_ENDOFDISPLAY 0x80
226 #define DVBSUB_ST_STUFFING 0xff
227 /* List of different OBJECT TYPES */
228 /* According to EN 300-743, table 6 */
229 #define DVBSUB_OT_BASIC_BITMAP 0x00
230 #define DVBSUB_OT_BASIC_CHAR 0x01
231 #define DVBSUB_OT_COMPOSITE_STRING 0x02
232 /* Pixel DATA TYPES */
233 /* According to EN 300-743, table 9 */
234 #define DVBSUB_DT_2BP_CODE_STRING 0x10
235 #define DVBSUB_DT_4BP_CODE_STRING 0x11
236 #define DVBSUB_DT_8BP_CODE_STRING 0x12
237 #define DVBSUB_DT_24_TABLE_DATA 0x20
238 #define DVBSUB_DT_28_TABLE_DATA 0x21
239 #define DVBSUB_DT_48_TABLE_DATA 0x22
240 #define DVBSUB_DT_END_LINE 0xf0
241 /* List of different Page Composition Segment state */
242 /* According to EN 300-743, 7.2.1 table 3 */
243 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
244 #define DVBSUB_PCS_STATE_CHANGE 0x10
246 /*****************************************************************************
248 *****************************************************************************/
249 static void decode_segment( decoder_t *, bs_t * );
250 static void decode_page_composition( decoder_t *, bs_t * );
251 static void decode_region_composition( decoder_t *, bs_t * );
252 static void decode_object( decoder_t *, bs_t * );
253 static void decode_clut( decoder_t *, bs_t * );
254 static void free_all( decoder_t * );
256 static void default_clut_init( decoder_t * );
258 static subpicture_t *render( decoder_t * );
260 /*****************************************************************************
261 * Open: probe the decoder and return score
262 *****************************************************************************
263 * Tries to launch a decoder and return score so that the interface is able
265 *****************************************************************************/
266 static int Open( vlc_object_t *p_this )
268 decoder_t *p_dec = (decoder_t *) p_this;
269 decoder_sys_t *p_sys;
273 if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','v','b','s') )
278 p_dec->pf_decode_sub = Decode;
279 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
280 memset( p_sys, 0, sizeof(decoder_sys_t) );
282 p_sys->i_pts = (mtime_t) 0;
283 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
284 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
286 p_sys->p_regions = NULL;
287 p_sys->p_cluts = NULL;
288 p_sys->p_page = NULL;
290 var_Create( p_this, DVBSUB_CFG_PREFIX "position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
291 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
292 p_sys->i_spu_position = val.i_int;
293 var_Create( p_this, DVBSUB_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
294 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
296 var_Create( p_this, DVBSUB_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
297 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
300 /* Check if subpicture position was overridden */
301 p_sys->b_absolute = VLC_TRUE;
302 if( posx < 0 || posy < 0)
304 p_sys->b_absolute = VLC_FALSE;
308 else if( posx >= 0 || posy >= 0 )
310 p_sys->i_spu_x = posx;
311 p_sys->i_spu_y = posy;
313 else if( p_sys->i_spu_x < 0 || p_sys->i_spu_y < 0 )
315 p_sys->b_absolute = VLC_FALSE;
320 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 'd','v','b','s' ) );
322 default_clut_init( p_dec );
327 /*****************************************************************************
329 *****************************************************************************/
330 static void Close( vlc_object_t *p_this )
332 decoder_t *p_dec = (decoder_t*) p_this;
333 decoder_sys_t *p_sys = p_dec->p_sys;
335 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
336 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
337 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
343 /*****************************************************************************
345 *****************************************************************************/
346 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
348 decoder_sys_t *p_sys = p_dec->p_sys;
350 subpicture_t *p_spu = NULL;
352 if( pp_block == NULL || *pp_block == NULL ) return NULL;
356 p_sys->i_pts = p_block->i_pts;
357 if( p_sys->i_pts <= 0 )
360 /* Some DVB channels send stuffing segments in non-dated packets so
361 * don't complain too loudly. */
362 msg_Warn( p_dec, "non dated subtitle" );
364 block_Release( p_block );
368 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
370 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
372 msg_Dbg( p_dec, "invalid data identifier" );
373 block_Release( p_block );
377 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
379 msg_Dbg( p_dec, "invalid subtitle stream id" );
380 block_Release( p_block );
385 msg_Dbg( p_dec, "subtitle packet received: "I64Fd, p_sys->i_pts );
388 p_sys->b_page = VLC_FALSE;
389 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
391 decode_segment( p_dec, &p_sys->bs );
394 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
396 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
397 block_Release( p_block );
401 /* Check if the page is to be displayed */
402 if( p_sys->p_page && p_sys->b_page ) p_spu = render( p_dec );
404 block_Release( p_block );
409 /* following functions are local */
411 /*****************************************************************************
412 * default_clut_init: default clut as defined in EN 300-743 section 10
413 *****************************************************************************/
414 static void default_clut_init( decoder_t *p_dec )
416 decoder_sys_t *p_sys = p_dec->p_sys;
419 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
420 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
421 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
424 for( i = 0; i < 4; i++ )
426 uint8_t R = 0, G = 0, B = 0, T = 0;
428 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
429 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
430 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
431 else R = G = B = 0x7F;
433 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
434 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
435 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
436 p_sys->default_clut.c_2b[i].T = T;
439 /* 16 entries CLUT */
440 for( i = 0; i < 16; i++ )
442 uint8_t R = 0, G = 0, B = 0, T = 0;
446 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
452 R = (i & 0x1) ? 0xFF : 0;
453 G = (i & 0x2) ? 0xFF : 0;
454 B = (i & 0x4) ? 0xFF : 0;
459 R = (i & 0x1) ? 0x7F : 0;
460 G = (i & 0x2) ? 0x7F : 0;
461 B = (i & 0x4) ? 0x7F : 0;
464 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
465 p_sys->default_clut.c_4b[i].Cr = RGB_TO_U(R,G,B);
466 p_sys->default_clut.c_4b[i].Cb = RGB_TO_V(R,G,B);
467 p_sys->default_clut.c_4b[i].T = T;
470 /* 256 entries CLUT */
471 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
474 static void decode_segment( decoder_t *p_dec, bs_t *s )
476 decoder_sys_t *p_sys = p_dec->p_sys;
481 /* sync_byte (already checked) */
485 i_type = bs_read( s, 8 );
488 i_page_id = bs_read( s, 16 );
491 i_size = bs_show( s, 16 );
493 if( i_page_id != p_sys->i_id && i_page_id != p_sys->i_ancillary_id )
496 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
497 i_page_id, p_sys->i_id );
499 bs_skip( s, 8 * ( 2 + i_size ) );
503 if( p_sys->i_ancillary_id != p_sys->i_id &&
504 i_type == DVBSUB_ST_PAGE_COMPOSITION &&
505 i_page_id == p_sys->i_ancillary_id )
508 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
510 bs_skip( s, 8 * ( 2 + i_size ) );
515 if( i_page_id == p_sys->i_id )
516 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
518 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
523 case DVBSUB_ST_PAGE_COMPOSITION:
525 msg_Dbg( p_dec, "decode_page_composition" );
527 decode_page_composition( p_dec, s );
530 case DVBSUB_ST_REGION_COMPOSITION:
532 msg_Dbg( p_dec, "decode_region_composition" );
534 decode_region_composition( p_dec, s );
537 case DVBSUB_ST_CLUT_DEFINITION:
539 msg_Dbg( p_dec, "decode_clut" );
541 decode_clut( p_dec, s );
544 case DVBSUB_ST_OBJECT_DATA:
546 msg_Dbg( p_dec, "decode_object" );
548 decode_object( p_dec, s );
551 case DVBSUB_ST_ENDOFDISPLAY:
553 msg_Dbg( p_dec, "end of display" );
555 bs_skip( s, 8 * ( 2 + i_size ) );
558 case DVBSUB_ST_STUFFING:
560 msg_Dbg( p_dec, "skip stuffing" );
562 bs_skip( s, 8 * ( 2 + i_size ) );
566 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
567 bs_skip( s, 8 * ( 2 + i_size ) );
572 static void decode_clut( decoder_t *p_dec, bs_t *s )
574 decoder_sys_t *p_sys = p_dec->p_sys;
575 uint16_t i_segment_length;
576 uint16_t i_processed_length;
577 dvbsub_clut_t *p_clut, *p_next;
580 i_segment_length = bs_read( s, 16 );
581 i_id = bs_read( s, 8 );
582 i_version = bs_read( s, 4 );
584 /* Check if we already have this clut */
585 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
587 if( p_clut->i_id == i_id ) break;
590 /* Check version number */
591 if( p_clut && p_clut->i_version == i_version )
594 bs_skip( s, 8 * i_segment_length - 12 );
601 msg_Dbg( p_dec, "new clut: %i", i_id );
603 p_clut = malloc( sizeof(dvbsub_clut_t) );
604 p_clut->p_next = p_sys->p_cluts;
605 p_sys->p_cluts = p_clut;
608 /* Initialize to default clut */
609 p_next = p_clut->p_next;
610 *p_clut = p_sys->default_clut;
611 p_clut->p_next = p_next;
613 /* We don't have this version of the CLUT: Parse it */
614 p_clut->i_version = i_version;
616 bs_skip( s, 4 ); /* Reserved bits */
617 i_processed_length = 2;
618 while( i_processed_length < i_segment_length )
620 uint8_t y, cb, cr, t;
624 i_id = bs_read( s, 8 );
625 i_type = bs_read( s, 3 );
629 if( bs_read( s, 1 ) )
632 cr = bs_read( s, 8 );
633 cb = bs_read( s, 8 );
635 i_processed_length += 6;
639 y = bs_read( s, 6 ) << 2;
640 cr = bs_read( s, 4 ) << 4;
641 cb = bs_read( s, 4 ) << 4;
642 t = bs_read( s, 2 ) << 6;
643 i_processed_length += 4;
646 /* We are not entirely compliant here as full transparency is indicated
647 * with a luma value of zero, not a transparency value of 0xff
648 * (full transparency would actually be 0xff + 1). */
655 /* According to EN 300-743 section 7.2.3 note 1, type should
656 * not have more than 1 bit set to one, but some streams don't
657 * respect this note. */
658 if( i_type & 0x04 && i_id < 4 )
660 p_clut->c_2b[i_id].Y = y;
661 p_clut->c_2b[i_id].Cr = cr;
662 p_clut->c_2b[i_id].Cb = cb;
663 p_clut->c_2b[i_id].T = t;
665 if( i_type & 0x02 && i_id < 16 )
667 p_clut->c_4b[i_id].Y = y;
668 p_clut->c_4b[i_id].Cr = cr;
669 p_clut->c_4b[i_id].Cb = cb;
670 p_clut->c_4b[i_id].T = t;
674 p_clut->c_8b[i_id].Y = y;
675 p_clut->c_8b[i_id].Cr = cr;
676 p_clut->c_8b[i_id].Cb = cb;
677 p_clut->c_8b[i_id].T = t;
682 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
684 decoder_sys_t *p_sys = p_dec->p_sys;
685 int i_version, i_state, i_segment_length, i_timeout, i;
687 /* A page is composed by 0 or more region */
688 i_segment_length = bs_read( s, 16 );
689 i_timeout = bs_read( s, 8 );
690 i_version = bs_read( s, 4 );
691 i_state = bs_read( s, 2 );
692 bs_skip( s, 2 ); /* Reserved */
694 if( i_state == DVBSUB_PCS_STATE_CHANGE )
696 /* End of an epoch, reset decoder buffer */
698 msg_Dbg( p_dec, "page composition mode change" );
702 else if( !p_sys->p_page && i_state != DVBSUB_PCS_STATE_ACQUISITION &&
703 i_state != DVBSUB_PCS_STATE_CHANGE )
705 /* Not a full PCS, we need to wait for one */
706 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
709 /* Try to start decoding even without an acquisition page */
710 bs_skip( s, 8 * (i_segment_length - 2) );
716 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
717 msg_Dbg( p_dec, "acquisition page composition" );
720 /* Check version number */
721 if( p_sys->p_page && p_sys->p_page->i_version == i_version )
723 bs_skip( s, 8 * (i_segment_length - 2) );
726 else if( p_sys->p_page )
728 if( p_sys->p_page->i_region_defs )
729 free( p_sys->p_page->p_region_defs );
730 p_sys->p_page->i_region_defs = 0;
736 msg_Dbg( p_dec, "new page" );
738 /* Allocate a new page */
739 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
742 p_sys->p_page->i_version = i_version;
743 p_sys->p_page->i_timeout = i_timeout;
744 p_sys->b_page = VLC_TRUE;
746 /* Number of regions */
747 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
749 if( p_sys->p_page->i_region_defs == 0 ) return;
751 p_sys->p_page->p_region_defs =
752 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
753 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
755 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
756 bs_skip( s, 8 ); /* Reserved */
757 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
758 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
761 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
762 i, p_sys->p_page->p_region_defs[i].i_x,
763 p_sys->p_page->p_region_defs[i].i_y );
768 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
770 decoder_sys_t *p_sys = p_dec->p_sys;
771 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
772 int i_segment_length, i_processed_length, i_id, i_version;
773 int i_width, i_height, i_level_comp, i_depth, i_clut;
774 int i_8_bg, i_4_bg, i_2_bg;
777 i_segment_length = bs_read( s, 16 );
778 i_id = bs_read( s, 8 );
779 i_version = bs_read( s, 4 );
781 /* Check if we already have this region */
782 for( p_region = p_sys->p_regions; p_region != NULL;
783 p_region = p_region->p_next )
785 pp_region = &p_region->p_next;
786 if( p_region->i_id == i_id ) break;
789 /* Check version number */
790 if( p_region && p_region->i_version == i_version )
792 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
799 msg_Dbg( p_dec, "new region: %i", i_id );
801 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
802 memset( p_region, 0, sizeof(dvbsub_region_t) );
803 p_region->p_object_defs = NULL;
804 p_region->p_pixbuf = NULL;
805 p_region->p_next = NULL;
808 /* Region attributes */
809 p_region->i_id = i_id;
810 p_region->i_version = i_version;
811 b_fill = bs_read( s, 1 );
812 bs_skip( s, 3 ); /* Reserved */
814 i_width = bs_read( s, 16 );
815 i_height = bs_read( s, 16 );
817 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
819 i_level_comp = bs_read( s, 3 );
820 i_depth = bs_read( s, 3 );
821 bs_skip( s, 2 ); /* Reserved */
822 i_clut = bs_read( s, 8 );
824 i_8_bg = bs_read( s, 8 );
825 i_4_bg = bs_read( s, 4 );
826 i_2_bg = bs_read( s, 2 );
827 bs_skip( s, 2 ); /* Reserved */
829 /* Free old object defs */
830 while( p_region->i_object_defs )
832 int i = p_region->i_object_defs - 1;
833 if( p_region->p_object_defs[i].psz_text )
834 free( p_region->p_object_defs[i].psz_text );
835 if( !i ) free( p_region->p_object_defs );
837 p_region->i_object_defs--;
839 p_region->p_object_defs = NULL;
841 /* Extra sanity checks */
842 if( p_region->i_width != i_width || p_region->i_height != i_height )
844 if( p_region->p_pixbuf )
846 msg_Dbg( p_dec, " changed (not allowed)" );
847 free( p_region->p_pixbuf );
850 p_region->p_pixbuf = malloc( i_height * i_width );
851 p_region->i_depth = 0;
854 if( p_region->i_depth && (p_region->i_depth != i_depth ||
855 p_region->i_level_comp != i_level_comp || p_region->i_clut != i_clut) )
857 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
860 /* Erase background of region */
863 int i_background = (p_region->i_depth == 1) ? i_2_bg :
864 (p_region->i_depth == 2) ? i_4_bg : i_8_bg;
865 memset( p_region->p_pixbuf, i_background, i_width * i_height );
868 p_region->i_width = i_width;
869 p_region->i_height = i_height;
870 p_region->i_level_comp = i_level_comp;
871 p_region->i_depth = i_depth;
872 p_region->i_clut = i_clut;
874 /* List of objects in the region */
875 i_processed_length = 10;
876 while( i_processed_length < i_segment_length )
878 dvbsub_objectdef_t *p_obj;
880 /* We create a new object */
881 p_region->i_object_defs++;
882 p_region->p_object_defs =
883 realloc( p_region->p_object_defs,
884 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
886 /* We parse object properties */
887 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
888 p_obj->i_id = bs_read( s, 16 );
889 p_obj->i_type = bs_read( s, 2 );
890 bs_skip( s, 2 ); /* Provider */
891 p_obj->i_x = bs_read( s, 12 );
892 bs_skip( s, 4 ); /* Reserved */
893 p_obj->i_y = bs_read( s, 12 );
896 i_processed_length += 6;
898 if( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ||
899 p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING )
901 p_obj->i_fg_pc = bs_read( s, 8 );
902 p_obj->i_bg_pc = bs_read( s, 8 );
903 i_processed_length += 2;
908 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
910 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
911 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
912 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
914 static void decode_object( decoder_t *p_dec, bs_t *s )
916 decoder_sys_t *p_sys = p_dec->p_sys;
917 dvbsub_region_t *p_region;
918 int i_segment_length, i_coding_method, i_version, i_id, i;
919 vlc_bool_t b_non_modify_color;
921 /* ETSI 300-743 paragraph 7.2.4
922 * sync_byte, segment_type and page_id have already been processed.
924 i_segment_length = bs_read( s, 16 );
925 i_id = bs_read( s, 16 );
926 i_version = bs_read( s, 4 );
927 i_coding_method = bs_read( s, 2 );
929 if( i_coding_method > 1 )
931 msg_Dbg( p_dec, "Unknown DVB subtitling coding %d is not handled!", i_coding_method );
932 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
936 /* Check if the object needs to be rendered in at least one
938 for( p_region = p_sys->p_regions; p_region != NULL;
939 p_region = p_region->p_next )
941 for( i = 0; i < p_region->i_object_defs; i++ )
942 if( p_region->p_object_defs[i].i_id == i_id ) break;
944 if( i != p_region->i_object_defs ) break;
948 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
953 msg_Dbg( p_dec, "new object: %i", i_id );
956 b_non_modify_color = bs_read( s, 1 );
957 bs_skip( s, 1 ); /* Reserved */
959 if( i_coding_method == 0x00 )
961 int i_topfield, i_bottomfield;
962 uint8_t *p_topfield, *p_bottomfield;
964 i_topfield = bs_read( s, 16 );
965 i_bottomfield = bs_read( s, 16 );
966 p_topfield = s->p_start + bs_pos( s ) / 8;
967 p_bottomfield = p_topfield + i_topfield;
969 bs_skip( s, 8 * (i_segment_length - 7) );
972 if( i_segment_length < i_topfield + i_bottomfield + 7 ||
973 p_topfield + i_topfield + i_bottomfield > s->p_end )
975 msg_Dbg( p_dec, "corrupted object data" );
979 for( p_region = p_sys->p_regions; p_region != NULL;
980 p_region = p_region->p_next )
982 for( i = 0; i < p_region->i_object_defs; i++ )
984 if( p_region->p_object_defs[i].i_id != i_id ) continue;
986 dvbsub_render_pdata( p_dec, p_region,
987 p_region->p_object_defs[i].i_x,
988 p_region->p_object_defs[i].i_y,
989 p_topfield, i_topfield );
993 dvbsub_render_pdata( p_dec, p_region,
994 p_region->p_object_defs[i].i_x,
995 p_region->p_object_defs[i].i_y + 1,
996 p_bottomfield, i_bottomfield );
1000 /* Duplicate the top field */
1001 dvbsub_render_pdata( p_dec, p_region,
1002 p_region->p_object_defs[i].i_x,
1003 p_region->p_object_defs[i].i_y + 1,
1004 p_topfield, i_topfield );
1011 /* DVB subtitling as characters */
1012 int i_number_of_codes = bs_read( s, 8 );
1013 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1016 if( i_segment_length < i_number_of_codes*2 + 4 ||
1017 p_start + i_number_of_codes*2 > s->p_end )
1019 msg_Dbg( p_dec, "corrupted object data" );
1023 for( p_region = p_sys->p_regions; p_region != NULL;
1024 p_region = p_region->p_next )
1026 for( i = 0; i < p_region->i_object_defs; i++ )
1030 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1032 p_region->p_object_defs[i].psz_text =
1033 realloc( p_region->p_object_defs[i].psz_text,
1034 i_number_of_codes + 1 );
1036 for( j = 0; j < i_number_of_codes; j++ )
1038 p_region->p_object_defs[i].psz_text[j] = bs_read( s, 16 );
1040 p_region->p_object_defs[i].psz_text[j] = 0;
1046 msg_Dbg( p_dec, "end object: %i", i_id );
1050 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1052 uint8_t *p_field, int i_field )
1059 if( !p_region->p_pixbuf )
1061 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1064 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1065 i_x >= p_region->i_width )
1067 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1071 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1072 bs_init( &bs, p_field, i_field );
1074 while( !bs_eof( &bs ) )
1077 if( i_y >= p_region->i_height ) return;
1079 switch( bs_read( &bs, 8 ) )
1082 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1087 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1092 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1099 /* We don't use map tables */
1102 case 0xf0: /* End of line code */
1103 p_pixbuf += 2*p_region->i_width;
1104 i_offset = 0; i_y += 2;
1110 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1112 vlc_bool_t b_stop = 0;
1114 while( !b_stop && !bs_eof( s ) )
1116 int i_count = 0, i_color = 0;
1118 if( (i_color = bs_read( s, 2 )) != 0x00 )
1124 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1126 i_count = 3 + bs_read( s, 3 );
1127 i_color = bs_read( s, 2 );
1131 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1133 switch( bs_read( s, 2 ) ) //Switch3
1142 i_count = 12 + bs_read( s, 4 );
1143 i_color = bs_read( s, 2 );
1146 i_count = 29 + bs_read( s, 8 );
1147 i_color = bs_read( s, 2 );
1155 /* 1 pixel color 0 */
1161 if( !i_count ) continue;
1164 if( i_count + *pi_off > i_width ) break;
1166 if( i_count == 1 ) p[*pi_off] = i_color;
1167 else memset( p + *pi_off, i_color, i_count );
1169 (*pi_off) += i_count;
1175 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1177 vlc_bool_t b_stop = 0;
1179 while( !b_stop && !bs_eof( s ) )
1181 int i_count = 0, i_color = 0;
1183 if( (i_color = bs_read( s, 4 )) != 0x00 )
1190 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1192 if( bs_show( s, 3 ) != 0x00 )
1194 i_count = 2 + bs_read( s, 3 );
1204 if( bs_read( s, 1 ) == 0x00) //Switch2
1206 i_count = 4 + bs_read( s, 2 );
1207 i_color = bs_read( s, 4 );
1211 switch ( bs_read( s, 2 ) ) //Switch3
1220 i_count = 9 + bs_read( s, 4 );
1221 i_color = bs_read( s, 4 );
1224 i_count= 25 + bs_read( s, 8 );
1225 i_color = bs_read( s, 4 );
1232 if( !i_count ) continue;
1235 if( i_count + *pi_off > i_width ) break;
1237 if( i_count == 1 ) p[*pi_off] = i_color;
1238 else memset( p + *pi_off, i_color, i_count );
1240 (*pi_off) += i_count;
1246 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1248 vlc_bool_t b_stop = 0;
1250 while( !b_stop && !bs_eof( s ) )
1252 int i_count = 0, i_color = 0;
1254 if( (i_color = bs_read( s, 8 )) != 0x00 )
1261 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1263 if( bs_show( s, 7 ) != 0x00 )
1265 i_count = bs_read( s, 7 );
1275 i_count = bs_read( s, 7 );
1276 i_color = bs_read( s, 8 );
1280 if( !i_count ) continue;
1283 if( i_count + *pi_off > i_width ) break;
1285 if( i_count == 1 ) p[*pi_off] = i_color;
1286 else memset( p + *pi_off, i_color, i_count );
1288 (*pi_off) += i_count;
1294 static void free_all( decoder_t *p_dec )
1296 decoder_sys_t *p_sys = p_dec->p_sys;
1297 dvbsub_region_t *p_reg, *p_reg_next;
1298 dvbsub_clut_t *p_clut, *p_clut_next;
1300 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1302 p_clut_next = p_clut->p_next;
1305 p_sys->p_cluts = NULL;
1307 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1311 p_reg_next = p_reg->p_next;
1312 for( i = 0; i < p_reg->i_object_defs; i++ )
1313 if( p_reg->p_object_defs[i].psz_text )
1314 free( p_reg->p_object_defs[i].psz_text );
1315 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1316 if( p_reg->p_pixbuf ) free( p_reg->p_pixbuf );
1319 p_sys->p_regions = NULL;
1323 if( p_sys->p_page->i_region_defs )
1324 free( p_sys->p_page->p_region_defs );
1325 free( p_sys->p_page );
1327 p_sys->p_page = NULL;
1330 static subpicture_t *render( decoder_t *p_dec )
1332 decoder_sys_t *p_sys = p_dec->p_sys;
1333 subpicture_t *p_spu;
1334 subpicture_region_t **pp_spu_region;
1335 int i, j, i_timeout = 0;
1337 /* Allocate the subpicture internal data. */
1338 p_spu = p_dec->pf_spu_buffer_new( p_dec );
1339 if( !p_spu ) return NULL;
1341 pp_spu_region = &p_spu->p_region;
1343 /* Loop on region definitions */
1346 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1349 for( i = 0; p_sys->p_page && i < p_sys->p_page->i_region_defs; i++ )
1351 dvbsub_region_t *p_region;
1352 dvbsub_regiondef_t *p_regiondef;
1353 dvbsub_clut_t *p_clut;
1354 dvbsub_color_t *p_color;
1355 subpicture_region_t *p_spu_region;
1356 uint8_t *p_src, *p_dst;
1360 i_timeout = p_sys->p_page->i_timeout;
1362 p_regiondef = &p_sys->p_page->p_region_defs[i];
1365 msg_Dbg( p_dec, "rendering region %i (%i,%i)", i,
1366 p_regiondef->i_x, p_regiondef->i_y );
1369 /* Find associated region */
1370 for( p_region = p_sys->p_regions; p_region != NULL;
1371 p_region = p_region->p_next )
1373 if( p_regiondef->i_id == p_region->i_id ) break;
1378 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1382 /* Find associated CLUT */
1383 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1385 if( p_region->i_clut == p_clut->i_id ) break;
1389 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1393 /* Create new SPU region */
1394 memset( &fmt, 0, sizeof(video_format_t) );
1395 fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
1396 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1397 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1398 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1399 fmt.i_x_offset = fmt.i_y_offset = 0;
1400 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1403 msg_Err( p_dec, "cannot allocate SPU region" );
1406 p_spu_region->i_x = p_regiondef->i_x;
1407 p_spu_region->i_y = p_regiondef->i_y;
1408 *pp_spu_region = p_spu_region;
1409 pp_spu_region = &p_spu_region->p_next;
1412 fmt.p_palette->i_entries = p_region->i_depth == 1 ? 4 :
1413 p_region->i_depth == 2 ? 16 : 256;
1414 p_color = (p_region->i_depth == 1) ? p_clut->c_2b :
1415 (p_region->i_depth == 2) ? p_clut->c_4b : p_clut->c_8b;
1416 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1418 fmt.p_palette->palette[j][0] = p_color[j].Y;
1419 fmt.p_palette->palette[j][1] = p_color[j].Cr;
1420 fmt.p_palette->palette[j][2] = p_color[j].Cb;
1421 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1424 p_src = p_region->p_pixbuf;
1425 p_dst = p_spu_region->picture.Y_PIXELS;
1426 i_pitch = p_spu_region->picture.Y_PITCH;
1428 /* Copy pixel buffer */
1429 for( j = 0; j < p_region->i_height; j++ )
1431 memcpy( p_dst, p_src, p_region->i_width );
1432 p_src += p_region->i_width;
1436 /* Check subtitles encoded as strings of characters
1437 * (since there are not rendered in the pixbuffer) */
1438 for( j = 0; j < p_region->i_object_defs; j++ )
1440 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[i];
1442 if( p_object_def->i_type != 1 || !p_object_def->psz_text )
1445 /* Create new SPU region */
1446 memset( &fmt, 0, sizeof(video_format_t) );
1447 fmt.i_chroma = VLC_FOURCC('T','E','X','T');
1448 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1449 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1450 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1451 fmt.i_x_offset = fmt.i_y_offset = 0;
1452 p_spu_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
1455 msg_Err( p_dec, "cannot allocate SPU region" );
1459 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1460 p_spu_region->i_x = p_regiondef->i_x + p_object_def->i_x;
1461 p_spu_region->i_y = p_regiondef->i_y + p_object_def->i_y;
1462 *pp_spu_region = p_spu_region;
1463 pp_spu_region = &p_spu_region->p_next;
1467 /* Set the pf_render callback */
1468 p_spu->i_start = p_sys->i_pts;
1469 p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1470 p_spu->b_ephemer = VLC_TRUE;
1471 p_spu->b_fade = VLC_TRUE;
1473 /* Correct positioning of SPU */
1474 p_spu->b_absolute = p_sys->b_absolute;
1475 p_spu->i_flags = p_sys->i_spu_position;
1476 p_spu->i_x = p_sys->i_spu_x;
1477 p_spu->i_y = p_sys->i_spu_y;
1482 /*****************************************************************************
1483 * encoder_sys_t : encoder descriptor
1484 *****************************************************************************/
1485 typedef struct encoder_region_t
1492 struct encoder_sys_t
1494 unsigned int i_page_ver;
1495 unsigned int i_region_ver;
1496 unsigned int i_clut_ver;
1499 encoder_region_t *p_regions;
1503 /* subpicture positioning */
1506 int i_timeout_delay;
1509 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1510 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1511 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1512 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1514 /*****************************************************************************
1515 * OpenEncoder: probe the encoder and return score
1516 *****************************************************************************/
1517 static int OpenEncoder( vlc_object_t *p_this )
1519 encoder_t *p_enc = (encoder_t *)p_this;
1520 encoder_sys_t *p_sys;
1523 if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','v','b','s') &&
1526 return VLC_EGENERIC;
1529 /* Allocate the memory needed to store the decoder's structure */
1530 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1532 msg_Err( p_enc, "out of memory" );
1535 p_enc->p_sys = p_sys;
1537 p_enc->pf_encode_sub = Encode;
1538 p_enc->fmt_out.i_codec = VLC_FOURCC('d','v','b','s');
1539 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1541 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1543 p_sys->i_page_ver = 0;
1544 p_sys->i_region_ver = 0;
1545 p_sys->i_clut_ver = 0;
1546 p_sys->i_regions = 0;
1547 p_sys->p_regions = 0;
1549 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1550 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1551 p_sys->i_offset_x = val.i_int;
1552 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1553 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1554 p_sys->i_offset_y = val.i_int;
1555 var_Create( p_this, ENC_CFG_PREFIX "timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1556 var_Get( p_this, ENC_CFG_PREFIX "timeout", &val );
1557 p_sys->i_timeout_delay = val.i_int;
1562 /* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
1563 * into VLC_FOURCC('Y','U','V','P')
1565 static subpicture_t *YuvaYuvp( encoder_t *p_enc, subpicture_t *p_subpic )
1567 subpicture_region_t *p_region = NULL;
1569 if( !p_subpic ) return NULL;
1571 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1573 video_format_t *p_fmt = &p_region->fmt;
1574 int i = 0, j = 0, n = 0, p = 0;
1575 int i_max_entries = 256;
1577 #ifdef RANDOM_DITHERING
1578 int i_seed = 0xdeadbeef; /* random seed */
1582 int i_pixels = p_region->picture.p[0].i_visible_lines
1583 * p_region->picture.p[0].i_pitch;
1584 int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
1585 * p_region->picture.p[0].i_pitch
1586 + p_region->picture.p[0].i_pitch * 1 / 3;
1587 int i_tolerance = 0;
1590 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1592 p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
1593 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1594 if( !p_fmt->p_palette ) break;
1595 p_fmt->p_palette->i_entries = 0;
1597 /* Find best iterator using Euclide’s algorithm */
1598 for( ; i_iterator > 1 ; i_iterator-- )
1617 /* Count colors, build best palette */
1618 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1620 vlc_bool_t b_success = VLC_TRUE;
1621 p_fmt->p_palette->i_entries = 0;
1623 for( i = 0; i < i_pixels ; )
1626 y = p_region->picture.p[0].p_pixels[i];
1627 u = p_region->picture.p[1].p_pixels[i];
1628 v = p_region->picture.p[2].p_pixels[i];
1629 a = p_region->picture.p[3].p_pixels[i];
1630 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1632 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1633 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1634 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1635 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1640 if( j == p_fmt->p_palette->i_entries )
1642 p_fmt->p_palette->palette[j][0] = y;
1643 p_fmt->p_palette->palette[j][1] = u;
1644 p_fmt->p_palette->palette[j][2] = v;
1645 p_fmt->p_palette->palette[j][3] = a;
1646 p_fmt->p_palette->i_entries++;
1648 if( p_fmt->p_palette->i_entries >= i_max_entries )
1650 b_success = VLC_FALSE;
1667 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1670 #ifndef RANDOM_DITHERING
1671 pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
1672 * sizeof(int) * 4 );
1673 for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
1679 /* Fill image with our new colours */
1680 for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
1682 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1684 for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
1686 int i_offset = p * p_region->picture.p[0].i_pitch + n;
1688 int i_mindist, i_best;
1690 y = (int)p_region->picture.p[0].p_pixels[i_offset];
1691 u = (int)p_region->picture.p[1].p_pixels[i_offset];
1692 v = (int)p_region->picture.p[2].p_pixels[i_offset];
1693 a = (int)p_region->picture.p[3].p_pixels[i_offset];
1695 /* Add dithering compensation */
1696 #ifdef RANDOM_DITHERING
1697 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1698 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1699 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1700 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1702 y += i_ydelta + pi_delta[ n * 4 ];
1703 u += i_udelta + pi_delta[ n * 4 + 1 ];
1704 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1705 a += i_adelta + pi_delta[ n * 4 + 3 ];
1708 /* Find best colour in palette */
1709 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1713 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1714 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1715 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1716 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1718 if( i_dist < i_mindist )
1725 /* Set pixel to best color */
1726 p_region->picture.p[0].p_pixels[i_offset] = i_best;
1728 /* Update dithering state */
1729 #ifdef RANDOM_DITHERING
1730 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1732 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1733 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1734 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1735 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1736 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1737 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1738 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1739 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1740 i_ydelta = i_ydelta * 5 / 8;
1741 i_udelta = i_udelta * 5 / 8;
1742 i_vdelta = i_vdelta * 5 / 8;
1743 i_adelta = i_adelta * 5 / 8;
1747 #ifndef RANDOM_DITHERING
1752 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1754 p_fmt->p_palette->palette[i][0] = 0;
1755 p_fmt->p_palette->palette[i][1] = 0;
1756 p_fmt->p_palette->palette[i][2] = 0;
1757 p_fmt->p_palette->palette[i][3] = 0;
1759 p_fmt->p_palette->i_entries = i_max_entries;
1761 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1767 /****************************************************************************
1768 * Encode: the whole thing
1769 ****************************************************************************/
1770 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1772 subpicture_t *p_temp = NULL;
1773 subpicture_region_t *p_region = NULL;
1774 bs_t bits, *s = &bits;
1777 if( !p_subpic || !p_subpic->p_region ) return NULL;
1779 /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
1780 * VLC_FOURCC('Y','U','V','P')
1782 p_region = p_subpic->p_region;
1783 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
1785 p_temp = YuvaYuvp( p_enc, p_subpic );
1788 msg_Err( p_enc, "no picture in subpicture" );
1791 p_region = p_subpic->p_region;
1795 if( !p_region ) return NULL;
1797 if( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') &&
1798 p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return NULL;
1800 if( p_region->fmt.p_palette )
1802 switch( p_region->fmt.p_palette->i_entries )
1810 msg_Err( p_enc, "subpicture palette (%d) not handled",
1811 p_region->fmt.p_palette->i_entries );
1818 msg_Dbg( p_enc, "encoding subpicture" );
1820 p_block = block_New( p_enc, 64000 );
1821 bs_init( s, p_block->p_buffer, p_block->i_buffer );
1823 bs_write( s, 8, 0x20 ); /* Data identifier */
1824 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1826 encode_page_composition( p_enc, s, p_subpic );
1827 encode_region_composition( p_enc, s, p_subpic );
1828 encode_clut( p_enc, s, p_subpic );
1829 encode_object( p_enc, s, p_subpic );
1831 /* End of display */
1832 bs_write( s, 8, 0x0f ); /* Sync byte */
1833 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1834 bs_write( s, 16, 1 ); /* Page id */
1835 bs_write( s, 16, 0 ); /* Segment length */
1837 bs_write( s, 8, 0xff );/* End marker */
1838 p_block->i_buffer = bs_pos( s ) / 8;
1839 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
1840 if( !p_subpic->b_ephemer && p_subpic->i_stop > p_subpic->i_start )
1842 block_t *p_block_stop;
1844 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
1846 /* Send another (empty) subtitle to signal the end of display */
1847 p_block_stop = block_New( p_enc, 64000 );
1848 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
1849 bs_write( s, 8, 0x20 ); /* Data identifier */
1850 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
1851 encode_page_composition( p_enc, s, 0 );
1852 bs_write( s, 8, 0x0f ); /* Sync byte */
1853 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
1854 bs_write( s, 16, 1 ); /* Page id */
1855 bs_write( s, 16, 0 ); /* Segment length */
1856 bs_write( s, 8, 0xff );/* End marker */
1857 p_block_stop->i_buffer = bs_pos( s ) / 8;
1858 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
1859 block_ChainAppend( &p_block, p_block_stop );
1860 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
1863 msg_Dbg( p_enc, "subpicture encoded properly" );
1868 /*****************************************************************************
1869 * CloseEncoder: encoder destruction
1870 *****************************************************************************/
1871 static void CloseEncoder( vlc_object_t *p_this )
1873 encoder_t *p_enc = (encoder_t *)p_this;
1874 encoder_sys_t *p_sys = p_enc->p_sys;
1876 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
1877 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
1878 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
1880 if( p_sys->i_regions ) free( p_sys->p_regions );
1884 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
1885 subpicture_t *p_subpic )
1887 encoder_sys_t *p_sys = p_enc->p_sys;
1888 subpicture_region_t *p_region;
1889 vlc_bool_t b_mode_change = VLC_FALSE;
1890 int i_regions, i_timeout;
1892 bs_write( s, 8, 0x0f ); /* Sync byte */
1893 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
1894 bs_write( s, 16, 1 ); /* Page id */
1896 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
1897 p_region; p_region = p_region->p_next, i_regions++ )
1899 if( i_regions >= p_sys->i_regions )
1901 encoder_region_t region;
1902 region.i_width = region.i_height = 0;
1904 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
1905 (p_sys->i_regions + 1) );
1906 p_sys->p_regions[p_sys->i_regions++] = region;
1909 if( ( p_sys->p_regions[i_regions].i_width <
1910 (int)p_region->fmt.i_visible_width ) ||
1911 ( p_sys->p_regions[i_regions].i_width >
1912 (int)p_region->fmt.i_visible_width ) )
1914 b_mode_change = VLC_TRUE;
1915 msg_Dbg( p_enc, "region %i width change: %i -> %i",
1916 i_regions, p_sys->p_regions[i_regions].i_width,
1917 p_region->fmt.i_visible_width );
1918 p_sys->p_regions[i_regions].i_width =
1919 p_region->fmt.i_visible_width;
1921 if( ( p_sys->p_regions[i_regions].i_height <
1922 (int)p_region->fmt.i_visible_height ) ||
1923 ( p_sys->p_regions[i_regions].i_height >
1924 (int)p_region->fmt.i_visible_height ) )
1926 b_mode_change = VLC_TRUE;
1927 msg_Dbg( p_enc, "region %i height change: %i -> %i",
1928 i_regions, p_sys->p_regions[i_regions].i_height,
1929 p_region->fmt.i_visible_height );
1930 p_sys->p_regions[i_regions].i_height =
1931 p_region->fmt.i_visible_height;
1935 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
1938 if( p_subpic && !p_subpic->b_ephemer &&
1939 p_subpic->i_stop > p_subpic->i_start )
1941 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
1944 bs_write( s, 8, i_timeout + p_sys->i_timeout_delay ); /* Timeout */
1945 bs_write( s, 4, p_sys->i_page_ver++ );
1946 bs_write( s, 2, b_mode_change ?
1947 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
1948 bs_write( s, 2, 0 ); /* Reserved */
1950 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
1951 p_region; p_region = p_region->p_next, i_regions++ )
1953 bs_write( s, 8, i_regions );
1954 bs_write( s, 8, 0 ); /* Reserved */
1955 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
1957 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
1958 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
1962 bs_write( s, 16, p_region->i_x );
1963 bs_write( s, 16, p_region->i_y );
1968 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
1970 encoder_sys_t *p_sys = p_enc->p_sys;
1971 subpicture_region_t *p_region = p_subpic->p_region;
1972 video_palette_t *p_pal, pal;
1976 if( !p_region ) return;
1978 if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','P') )
1980 p_pal = p_region->fmt.p_palette;
1985 for( i = 0; i < 4; i++ )
1987 pal.palette[i][0] = 0;
1988 pal.palette[i][1] = 0;
1989 pal.palette[i][2] = 0;
1990 pal.palette[i][3] = 0;
1995 bs_write( s, 8, 0x0f ); /* Sync byte */
1996 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
1997 bs_write( s, 16, 1 ); /* Page id */
1999 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2000 bs_write( s, 8, 1 ); /* Clut id */
2001 bs_write( s, 4, p_sys->i_clut_ver++ );
2002 bs_write( s, 4, 0 ); /* Reserved */
2004 for( i = 0; i < p_pal->i_entries; i++ )
2006 bs_write( s, 8, i ); /* Clut entry id */
2007 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2008 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2009 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2010 bs_write( s, 4, 0 ); /* Reserved */
2011 bs_write( s, 1, 1 ); /* Full range flag */
2012 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2013 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2014 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2015 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2016 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2020 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2021 subpicture_t *p_subpic )
2023 encoder_sys_t *p_sys = p_enc->p_sys;
2024 subpicture_region_t *p_region;
2027 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2028 p_region = p_region->p_next, i_region++ )
2030 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2032 p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T');
2036 video_palette_t *p_pal = p_region->fmt.p_palette;
2040 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2044 i_entries = p_pal->i_entries;
2045 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2047 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2049 if( !p_pal->palette[i_bg][3] ) break;
2053 bs_write( s, 8, 0x0f ); /* Sync byte */
2054 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2055 bs_write( s, 16, 1 ); /* Page id */
2057 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2058 bs_write( s, 8, i_region );
2059 bs_write( s, 4, p_sys->i_region_ver++ );
2061 /* Region attributes */
2062 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2063 bs_write( s, 3, 0 ); /* Reserved */
2064 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2065 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2066 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2067 bs_write( s, 3, i_depth ); /* Region depth */
2068 bs_write( s, 2, 0 ); /* Reserved */
2069 bs_write( s, 8, 1 ); /* Clut id */
2070 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2071 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2072 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2073 bs_write( s, 2, 0 ); /* Reserved */
2075 /* In our implementation we only have 1 object per region */
2076 bs_write( s, 16, i_region );
2077 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2078 bs_write( s, 2, 0 ); /* object provider flag */
2079 bs_write( s, 12, 0 );/* object horizontal position */
2080 bs_write( s, 4, 0 ); /* Reserved */
2081 bs_write( s, 12, 0 );/* object vertical position */
2085 bs_write( s, 8, 1 ); /* foreground pixel code */
2086 bs_write( s, 8, 0 ); /* background pixel code */
2091 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2092 subpicture_region_t *p_region,
2095 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2097 encoder_sys_t *p_sys = p_enc->p_sys;
2098 subpicture_region_t *p_region;
2101 int i_length_pos, i_update_pos, i_pixel_data_pos;
2103 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2104 p_region = p_region->p_next, i_region++ )
2106 bs_write( s, 8, 0x0f ); /* Sync byte */
2107 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2108 bs_write( s, 16, 1 ); /* Page id */
2110 i_length_pos = bs_pos( s );
2111 bs_write( s, 16, 0 ); /* Segment length */
2112 bs_write( s, 16, i_region ); /* Object id */
2113 bs_write( s, 4, p_sys->i_region_ver++ );
2115 /* object coding method */
2116 switch( p_region->fmt.i_chroma )
2118 case VLC_FOURCC( 'Y','U','V','P' ):
2119 bs_write( s, 2, 0 );
2121 case VLC_FOURCC( 'T','E','X','T' ):
2122 bs_write( s, 2, 1 );
2125 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2129 bs_write( s, 1, 0 ); /* non modifying color flag */
2130 bs_write( s, 1, 0 ); /* Reserved */
2132 if( p_region->fmt.i_chroma == VLC_FOURCC( 'T','E','X','T' ) )
2136 if( !p_region->psz_text ) continue;
2138 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2140 bs_write( s, 8, i_size ); /* number of characters in string */
2141 for( i = 0; i < i_size; i++ )
2143 bs_write( s, 16, p_region->psz_text[i] );
2146 /* Update segment length */
2147 SetWBE( &s->p_start[i_length_pos/8],
2148 (bs_pos(s) - i_length_pos)/8 -2 );
2152 /* Coding of a bitmap object */
2153 i_update_pos = bs_pos( s );
2154 bs_write( s, 16, 0 ); /* topfield data block length */
2155 bs_write( s, 16, 0 ); /* bottomfield data block length */
2158 i_pixel_data_pos = bs_pos( s );
2159 encode_pixel_data( p_enc, s, p_region, VLC_TRUE );
2160 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2161 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2164 i_pixel_data_pos = bs_pos( s );
2165 encode_pixel_data( p_enc, s, p_region, VLC_FALSE );
2166 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2167 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2169 /* Stuffing for word alignment */
2171 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2173 /* Update segment length */
2174 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2178 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2179 subpicture_region_t *p_region,
2181 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2182 subpicture_region_t *p_region,
2184 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2185 subpicture_region_t *p_region,
2187 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2188 subpicture_region_t *p_region,
2191 unsigned int i_line;
2194 if( p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return;
2196 /* Encode line by line */
2197 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2200 switch( p_region->fmt.p_palette->i_entries )
2206 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2207 encode_pixel_line_2bp( p_enc, s, p_region, i_line );
2211 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2212 encode_pixel_line_4bp( p_enc, s, p_region, i_line );
2216 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2217 encode_pixel_line_8bp( p_enc, s, p_region, i_line );
2221 msg_Err( p_enc, "subpicture palette (%i) not handled",
2222 p_region->fmt.p_palette->i_entries );
2226 bs_write( s, 8, 0xf0 ); /* End of object line code */
2230 static void encode_pixel_line_2bp( encoder_t *p_enc, bs_t *s,
2231 subpicture_region_t *p_region,
2234 unsigned int i, i_length = 0;
2235 int i_pitch = p_region->picture.p->i_pitch;
2236 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2237 int i_last_pixel = p_data[0];
2239 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2241 if( i != p_region->fmt.i_visible_width &&
2242 p_data[i] == i_last_pixel && i_length != 284 )
2248 if( i_length == 1 || i_length == 11 || i_length == 28 )
2250 /* 2bit/pixel code */
2251 if( i_last_pixel ) bs_write( s, 2, i_last_pixel );
2254 bs_write( s, 2, 0 );
2255 bs_write( s, 1, 0 );
2256 bs_write( s, 1, 1 ); /* pseudo color 0 */
2265 bs_write( s, 2, i_last_pixel );
2266 bs_write( s, 2, i_last_pixel );
2270 bs_write( s, 2, 0 );
2271 bs_write( s, 1, 0 );
2272 bs_write( s, 1, 0 );
2273 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2276 else if( i_length > 2 )
2278 bs_write( s, 2, 0 );
2279 if( i_length <= 10 )
2281 bs_write( s, 1, 1 );
2282 bs_write( s, 3, i_length - 3 );
2283 bs_write( s, 2, i_last_pixel );
2287 bs_write( s, 1, 0 );
2288 bs_write( s, 1, 0 );
2290 if( i_length <= 27 )
2292 bs_write( s, 2, 2 );
2293 bs_write( s, 4, i_length - 12 );
2294 bs_write( s, 2, i_last_pixel );
2298 bs_write( s, 2, 3 );
2299 bs_write( s, 8, i_length - 29 );
2300 bs_write( s, 2, i_last_pixel );
2305 if( i == p_region->fmt.i_visible_width ) break;
2307 i_last_pixel = p_data[i];
2312 bs_write( s, 2, 0 );
2313 bs_write( s, 1, 0 );
2314 bs_write( s, 1, 0 );
2315 bs_write( s, 2, 0 );
2321 static void encode_pixel_line_4bp( encoder_t *p_enc, bs_t *s,
2322 subpicture_region_t *p_region,
2325 unsigned int i, i_length = 0;
2326 int i_pitch = p_region->picture.p->i_pitch;
2327 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2328 int i_last_pixel = p_data[0];
2330 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2332 if( i != p_region->fmt.i_visible_width &&
2333 p_data[i] == i_last_pixel && i_length != 280 )
2339 if( i_length == 1 || (i_length == 3 && i_last_pixel) || i_length == 8 )
2341 /* 4bit/pixel code */
2342 if( i_last_pixel ) bs_write( s, 4, i_last_pixel );
2345 bs_write( s, 4, 0 );
2346 bs_write( s, 1, 1 );
2347 bs_write( s, 1, 1 );
2348 bs_write( s, 2, 0 ); /* pseudo color 0 */
2357 bs_write( s, 4, i_last_pixel );
2358 bs_write( s, 4, i_last_pixel );
2362 bs_write( s, 4, 0 );
2363 bs_write( s, 1, 1 );
2364 bs_write( s, 1, 1 );
2365 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2368 else if( !i_last_pixel && i_length >= 3 && i_length <= 9 )
2370 bs_write( s, 4, 0 );
2371 bs_write( s, 1, 0 );
2372 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2374 else if( i_length > 2 )
2376 bs_write( s, 4, 0 );
2377 bs_write( s, 1, 1 );
2381 bs_write( s, 1, 0 );
2382 bs_write( s, 2, i_length - 4 );
2383 bs_write( s, 4, i_last_pixel );
2387 bs_write( s, 1, 1 );
2389 if( i_length <= 24 )
2391 bs_write( s, 2, 2 );
2392 bs_write( s, 4, i_length - 9 );
2393 bs_write( s, 4, i_last_pixel );
2397 bs_write( s, 2, 3 );
2398 bs_write( s, 8, i_length - 25 );
2399 bs_write( s, 4, i_last_pixel );
2404 if( i == p_region->fmt.i_visible_width ) break;
2406 i_last_pixel = p_data[i];
2411 bs_write( s, 8, 0 );
2417 static void encode_pixel_line_8bp( encoder_t *p_enc, bs_t *s,
2418 subpicture_region_t *p_region,
2421 unsigned int i, i_length = 0;
2422 int i_pitch = p_region->picture.p->i_pitch;
2423 uint8_t *p_data = &p_region->picture.p->p_pixels[ i_pitch * i_line ];
2424 int i_last_pixel = p_data[0];
2426 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2428 if( i != p_region->fmt.i_visible_width &&
2429 p_data[i] == i_last_pixel && i_length != 127 )
2435 if( i_length == 1 && i_last_pixel )
2437 /* 8bit/pixel code */
2438 bs_write( s, 8, i_last_pixel );
2440 else if( i_length == 2 && i_last_pixel )
2442 /* 8bit/pixel code */
2443 bs_write( s, 8, i_last_pixel );
2444 bs_write( s, 8, i_last_pixel );
2446 else if( i_length <= 127 )
2448 bs_write( s, 8, 0 );
2452 bs_write( s, 1, 0 );
2453 bs_write( s, 7, i_length ); /* pseudo color 0 */
2457 bs_write( s, 1, 1 );
2458 bs_write( s, 7, i_length );
2459 bs_write( s, 8, i_last_pixel );
2463 if( i == p_region->fmt.i_visible_width ) break;
2465 i_last_pixel = p_data[i];
2470 bs_write( s, 8, 0 );
2471 bs_write( s, 8, 0 );