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) 2003-2009 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>
14 * Simon Hailes <simon _a_ screen.subtitling.com>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
29 *****************************************************************************/
31 /*****************************************************************************
35 * DVB subtitles coded as strings of characters are not handled correctly.
36 * The character codes in the string should actually be indexes referring to a
37 * character table identified in the subtitle descriptor.
39 * The spec is quite vague in this area, but what is meant is perhaps that it
40 * refers to the character index in the codepage belonging to the language specified
41 * in the subtitle descriptor. Potentially it's designed for widechar
42 * (but not for UTF-*) codepages.
43 *****************************************************************************
45 *****************************************************************************
46 * Notes on DDS (Display Definition Segment)
47 * DDS (Display Definition Segment) tells the decoder how the subtitle image relates to
49 * For SD, the subtitle image is always considered to be for display at 720x576
50 * (although it's assumed that for NTSC, this is 720x480, this is not documented well)
51 * Also, for SD, the subtitle image is drawn 'on the glass' (i.e. after video scaling,
53 * For 'HD' (subs marked type 0x14/0x24 in PSI), a DDS must be present, and the subs area
54 * is drawn onto the video area (scales if necessary). The DDS tells the decoder what
55 * resolution the subtitle images were intended for, and hence how to scale the subtitle
56 * images for a particular video size
57 * i.e. if HD video is presented as letterbox, the subs will
58 * be in the same place on the video as if the video was presented on an HD set
59 * indeed, if the HD video was pillarboxed by the decoder, the subs may be cut off as
60 * well as the video. The intent here is that the subs can be placed accurately on the video
61 * - somthing which was missed in the original spec.
63 * A DDS may also specify a window - this is where the subs images are moved so that the (0,0)
64 * origin of decode is offset.
65 ********************************************************************************************/
71 #include <vlc_common.h>
72 #include <vlc_plugin.h>
73 #include <vlc_codec.h>
78 /* #define DEBUG_DVBSUB 1 */
80 #define POSX_TEXT N_("Decoding X coordinate")
81 #define POSX_LONGTEXT N_("X coordinate of the rendered subtitle")
83 #define POSY_TEXT N_("Decoding Y coordinate")
84 #define POSY_LONGTEXT N_("Y coordinate of the rendered subtitle")
86 #define POS_TEXT N_("Subpicture position")
87 #define POS_LONGTEXT N_( \
88 "You can enforce the subpicture position on the video " \
89 "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
90 "also use combinations of these values, e.g. 6=top-right).")
92 #define ENC_POSX_TEXT N_("Encoding X coordinate")
93 #define ENC_POSX_LONGTEXT N_("X coordinate of the encoded subtitle" )
94 #define ENC_POSY_TEXT N_("Encoding Y coordinate")
95 #define ENC_POSY_LONGTEXT N_("Y coordinate of the encoded subtitle" )
97 static const int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
98 static const char *const ppsz_pos_descriptions[] =
99 { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
100 N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
102 /*****************************************************************************
104 *****************************************************************************/
105 static int Open ( vlc_object_t * );
106 static void Close( vlc_object_t * );
107 static subpicture_t *Decode( decoder_t *, block_t ** );
109 static int OpenEncoder ( vlc_object_t * );
110 static void CloseEncoder( vlc_object_t * );
111 static block_t *Encode ( encoder_t *, subpicture_t * );
114 # define DVBSUB_CFG_PREFIX "dvbsub-"
115 set_description( N_("DVB subtitles decoder") )
116 set_shortname( N_("DVB subtitles") )
117 set_capability( "decoder", 50 )
118 set_category( CAT_INPUT )
119 set_subcategory( SUBCAT_INPUT_SCODEC )
120 set_callbacks( Open, Close )
122 add_integer( DVBSUB_CFG_PREFIX "position", 8, NULL, POS_TEXT, POS_LONGTEXT, true )
123 change_integer_list( pi_pos_values, ppsz_pos_descriptions, NULL )
124 add_integer( DVBSUB_CFG_PREFIX "x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, false )
125 add_integer( DVBSUB_CFG_PREFIX "y", -1, NULL, POSY_TEXT, POSY_LONGTEXT, false )
127 # define ENC_CFG_PREFIX "sout-dvbsub-"
129 set_description( N_("DVB subtitles encoder") )
130 set_capability( "encoder", 100 )
131 set_callbacks( OpenEncoder, CloseEncoder )
133 add_integer( ENC_CFG_PREFIX "x", -1, NULL, ENC_POSX_TEXT, ENC_POSX_LONGTEXT, false )
134 add_integer( ENC_CFG_PREFIX "y", -1, NULL, ENC_POSY_TEXT, ENC_POSY_LONGTEXT, false )
135 add_obsolete_integer( ENC_CFG_PREFIX "timeout" ) /* Suppressed since 0.8.5 */
138 static const char *const ppsz_enc_options[] = { "x", "y", NULL };
140 /****************************************************************************
142 ****************************************************************************
143 * Those structures refer closely to the ETSI 300 743 Object model
144 ****************************************************************************/
146 /* The object definition gives the position of the object in a region [7.2.5] */
147 typedef struct dvbsub_objectdef_s
155 char *psz_text; /* for string of characters objects */
157 } dvbsub_objectdef_t;
159 /* The entry in the palette CLUT */
169 /* The displays dimensions [7.2.1] */
170 typedef struct dvbsub_display_s
179 /* these values are only relevant if windowed */
188 typedef struct dvbsub_clut_s
192 dvbsub_color_t c_2b[4];
193 dvbsub_color_t c_4b[16];
194 dvbsub_color_t c_8b[256];
196 struct dvbsub_clut_s *p_next;
200 /* The Region is an aera on the image [7.2.3]
201 * with a list of the object definitions associated and a CLUT */
202 typedef struct dvbsub_region_s
217 dvbsub_objectdef_t *p_object_defs;
219 struct dvbsub_region_s *p_next;
223 /* The object definition gives the position of the object in a region */
224 typedef struct dvbsub_regiondef_s
230 } dvbsub_regiondef_t;
232 /* The page defines the list of regions [7.2.2] */
236 int i_timeout; /* in seconds */
241 dvbsub_regiondef_t *p_region_defs;
249 /* Decoder internal data */
260 dvbsub_page_t *p_page;
261 dvbsub_region_t *p_regions;
262 dvbsub_clut_t *p_cluts;
263 /* this is very small, so keep forever */
264 dvbsub_display_t display;
265 dvbsub_clut_t default_clut;
269 /* List of different SEGMENT TYPES */
270 /* According to EN 300-743, table 2 */
271 #define DVBSUB_ST_PAGE_COMPOSITION 0x10
272 #define DVBSUB_ST_REGION_COMPOSITION 0x11
273 #define DVBSUB_ST_CLUT_DEFINITION 0x12
274 #define DVBSUB_ST_OBJECT_DATA 0x13
275 #define DVBSUB_ST_DISPLAY_DEFINITION 0x14
276 #define DVBSUB_ST_ENDOFDISPLAY 0x80
277 #define DVBSUB_ST_STUFFING 0xff
278 /* List of different OBJECT TYPES */
279 /* According to EN 300-743, table 6 */
280 #define DVBSUB_OT_BASIC_BITMAP 0x00
281 #define DVBSUB_OT_BASIC_CHAR 0x01
282 #define DVBSUB_OT_COMPOSITE_STRING 0x02
283 /* Pixel DATA TYPES */
284 /* According to EN 300-743, table 9 */
285 #define DVBSUB_DT_2BP_CODE_STRING 0x10
286 #define DVBSUB_DT_4BP_CODE_STRING 0x11
287 #define DVBSUB_DT_8BP_CODE_STRING 0x12
288 #define DVBSUB_DT_24_TABLE_DATA 0x20
289 #define DVBSUB_DT_28_TABLE_DATA 0x21
290 #define DVBSUB_DT_48_TABLE_DATA 0x22
291 #define DVBSUB_DT_END_LINE 0xf0
292 /* List of different Page Composition Segment state */
293 /* According to EN 300-743, 7.2.1 table 3 */
294 #define DVBSUB_PCS_STATE_ACQUISITION 0x01
295 #define DVBSUB_PCS_STATE_CHANGE 0x02
297 /*****************************************************************************
299 *****************************************************************************/
300 static void decode_segment( decoder_t *, bs_t * );
301 static void decode_page_composition( decoder_t *, bs_t * );
302 static void decode_region_composition( decoder_t *, bs_t * );
303 static void decode_object( decoder_t *, bs_t * );
304 static void decode_display_definition( decoder_t *, bs_t * );
305 static void decode_clut( decoder_t *, bs_t * );
306 static void free_all( decoder_t * );
308 static void default_clut_init( decoder_t * );
309 static void default_dds_init( decoder_t * );
311 static subpicture_t *render( decoder_t * );
313 /*****************************************************************************
314 * Open: probe the decoder and return score
315 *****************************************************************************
316 * Tries to launch a decoder and return score so that the interface is able
318 *****************************************************************************/
319 static int Open( vlc_object_t *p_this )
321 decoder_t *p_dec = (decoder_t *) p_this;
322 decoder_sys_t *p_sys;
326 if( p_dec->fmt_in.i_codec != VLC_CODEC_DVBS )
331 p_dec->pf_decode_sub = Decode;
332 p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
335 memset( p_sys, 0, sizeof(decoder_sys_t) );
337 p_sys->i_pts = (mtime_t) 0;
338 p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF;
339 p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16;
341 p_sys->p_regions = NULL;
342 p_sys->p_cluts = NULL;
343 p_sys->p_page = NULL;
345 /* configure for SD res in case DDS is not present */
346 default_dds_init( p_dec );
348 var_Create( p_this, DVBSUB_CFG_PREFIX "position",
349 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
350 var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val );
351 p_sys->i_spu_position = val.i_int;
352 var_Create( p_this, DVBSUB_CFG_PREFIX "x",
353 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
354 var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val );
356 var_Create( p_this, DVBSUB_CFG_PREFIX "y",
357 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
358 var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val );
361 /* Check if subpicture position was overridden */
362 p_sys->b_absolute = true;
363 p_sys->i_spu_x = p_sys->i_spu_y = 0;
365 if( ( i_posx >= 0 ) && ( i_posy >= 0 ) )
367 p_sys->b_absolute = true;
368 p_sys->i_spu_x = i_posx;
369 p_sys->i_spu_y = i_posy;
372 p_dec->fmt_out.i_cat = SPU_ES;
373 p_dec->fmt_out.i_codec = 0;
375 default_clut_init( p_dec );
380 /*****************************************************************************
382 *****************************************************************************/
383 static void Close( vlc_object_t *p_this )
385 decoder_t *p_dec = (decoder_t*) p_this;
386 decoder_sys_t *p_sys = p_dec->p_sys;
388 var_Destroy( p_this, DVBSUB_CFG_PREFIX "x" );
389 var_Destroy( p_this, DVBSUB_CFG_PREFIX "y" );
390 var_Destroy( p_this, DVBSUB_CFG_PREFIX "position" );
396 /*****************************************************************************
398 *****************************************************************************/
399 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
401 decoder_sys_t *p_sys = p_dec->p_sys;
403 subpicture_t *p_spu = NULL;
405 if( ( pp_block == NULL ) || ( *pp_block == NULL ) ) return NULL;
409 /* configure for SD res in case DDS is not present */
410 /* a change of PTS is a good indication we must get a new DDS */
411 if (p_sys->i_pts != p_block->i_pts)
412 default_dds_init( p_dec );
414 p_sys->i_pts = p_block->i_pts;
415 if( p_sys->i_pts <= 0 )
418 /* Some DVB channels send stuffing segments in non-dated packets so
419 * don't complain too loudly. */
420 msg_Warn( p_dec, "non dated subtitle" );
422 block_Release( p_block );
426 bs_init( &p_sys->bs, p_block->p_buffer, p_block->i_buffer );
428 if( bs_read( &p_sys->bs, 8 ) != 0x20 ) /* Data identifier */
430 msg_Dbg( p_dec, "invalid data identifier" );
431 block_Release( p_block );
435 if( bs_read( &p_sys->bs, 8 ) ) /* Subtitle stream id */
437 msg_Dbg( p_dec, "invalid subtitle stream id" );
438 block_Release( p_block );
443 msg_Dbg( p_dec, "subtitle packet received: %"PRId64, p_sys->i_pts );
446 p_sys->b_page = false;
447 while( bs_show( &p_sys->bs, 8 ) == 0x0f ) /* Sync byte */
449 decode_segment( p_dec, &p_sys->bs );
452 if( bs_read( &p_sys->bs, 8 ) != 0xff ) /* End marker */
454 msg_Warn( p_dec, "end marker not found (corrupted subtitle ?)" );
455 block_Release( p_block );
459 /* Check if the page is to be displayed */
460 if( p_sys->p_page && p_sys->b_page )
461 p_spu = render( p_dec );
463 block_Release( p_block );
468 /* following functions are local */
470 /*****************************************************************************
471 * default_clut_init: default clut as defined in EN 300-743 section 10
472 *****************************************************************************/
473 static void default_clut_init( decoder_t *p_dec )
475 decoder_sys_t *p_sys = p_dec->p_sys;
478 #define RGB_TO_Y(r, g, b) ((int16_t) 77 * r + 150 * g + 29 * b) / 256;
479 #define RGB_TO_U(r, g, b) ((int16_t) -44 * r - 87 * g + 131 * b) / 256;
480 #define RGB_TO_V(r, g, b) ((int16_t) 131 * r - 110 * g - 21 * b) / 256;
483 for( i = 0; i < 4; i++ )
485 uint8_t R = 0, G = 0, B = 0, T = 0;
487 if( !(i & 0x2) && !(i & 0x1) ) T = 0xFF;
488 else if( !(i & 0x2) && (i & 0x1) ) R = G = B = 0xFF;
489 else if( (i & 0x2) && !(i & 0x1) ) R = G = B = 0;
490 else R = G = B = 0x7F;
492 p_sys->default_clut.c_2b[i].Y = RGB_TO_Y(R,G,B);
493 p_sys->default_clut.c_2b[i].Cb = RGB_TO_V(R,G,B);
494 p_sys->default_clut.c_2b[i].Cr = RGB_TO_U(R,G,B);
495 p_sys->default_clut.c_2b[i].T = T;
498 /* 16 entries CLUT */
499 for( i = 0; i < 16; i++ )
501 uint8_t R = 0, G = 0, B = 0, T = 0;
505 if( !(i & 0x4) && !(i & 0x2) && !(i & 0x1) )
511 R = (i & 0x1) ? 0xFF : 0;
512 G = (i & 0x2) ? 0xFF : 0;
513 B = (i & 0x4) ? 0xFF : 0;
518 R = (i & 0x1) ? 0x7F : 0;
519 G = (i & 0x2) ? 0x7F : 0;
520 B = (i & 0x4) ? 0x7F : 0;
523 p_sys->default_clut.c_4b[i].Y = RGB_TO_Y(R,G,B);
524 p_sys->default_clut.c_4b[i].Cr = RGB_TO_V(R,G,B);
525 p_sys->default_clut.c_4b[i].Cb = RGB_TO_U(R,G,B);
526 p_sys->default_clut.c_4b[i].T = T;
529 /* 256 entries CLUT */
530 memset( p_sys->default_clut.c_8b, 0xFF, 256 * sizeof(dvbsub_color_t) );
533 static void decode_segment( decoder_t *p_dec, bs_t *s )
535 decoder_sys_t *p_sys = p_dec->p_sys;
540 /* sync_byte (already checked) */
544 i_type = bs_read( s, 8 );
547 i_page_id = bs_read( s, 16 );
550 i_size = bs_show( s, 16 );
552 if( ( i_page_id != p_sys->i_id ) &&
553 ( i_page_id != p_sys->i_ancillary_id ) )
556 msg_Dbg( p_dec, "subtitle skipped (page id: %i, %i)",
557 i_page_id, p_sys->i_id );
559 bs_skip( s, 8 * ( 2 + i_size ) );
563 if( ( p_sys->i_ancillary_id != p_sys->i_id ) &&
564 ( i_type == DVBSUB_ST_PAGE_COMPOSITION ) &&
565 ( i_page_id == p_sys->i_ancillary_id ) )
568 msg_Dbg( p_dec, "skipped invalid ancillary subtitle packet" );
570 bs_skip( s, 8 * ( 2 + i_size ) );
575 if( i_page_id == p_sys->i_id )
576 msg_Dbg( p_dec, "segment (id: %i)", i_page_id );
578 msg_Dbg( p_dec, "ancillary segment (id: %i)", i_page_id );
583 case DVBSUB_ST_PAGE_COMPOSITION:
585 msg_Dbg( p_dec, "decode_page_composition" );
587 decode_page_composition( p_dec, s );
590 case DVBSUB_ST_REGION_COMPOSITION:
592 msg_Dbg( p_dec, "decode_region_composition" );
594 decode_region_composition( p_dec, s );
597 case DVBSUB_ST_CLUT_DEFINITION:
599 msg_Dbg( p_dec, "decode_clut" );
601 decode_clut( p_dec, s );
604 case DVBSUB_ST_OBJECT_DATA:
606 msg_Dbg( p_dec, "decode_object" );
608 decode_object( p_dec, s );
611 case DVBSUB_ST_DISPLAY_DEFINITION:
613 msg_Dbg( p_dec, "decode_display_definition" );
615 decode_display_definition( p_dec, s );
618 case DVBSUB_ST_ENDOFDISPLAY:
620 msg_Dbg( p_dec, "end of display" );
622 bs_skip( s, 8 * ( 2 + i_size ) );
625 case DVBSUB_ST_STUFFING:
627 msg_Dbg( p_dec, "skip stuffing" );
629 bs_skip( s, 8 * ( 2 + i_size ) );
633 msg_Warn( p_dec, "unsupported segment type: (%04x)", i_type );
634 bs_skip( s, 8 * ( 2 + i_size ) );
639 static void decode_clut( decoder_t *p_dec, bs_t *s )
641 decoder_sys_t *p_sys = p_dec->p_sys;
642 uint16_t i_segment_length;
643 uint16_t i_processed_length;
644 dvbsub_clut_t *p_clut, *p_next;
647 i_segment_length = bs_read( s, 16 );
648 i_id = bs_read( s, 8 );
649 i_version = bs_read( s, 4 );
651 /* Check if we already have this clut */
652 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
654 if( p_clut->i_id == i_id ) break;
657 /* Check version number */
658 if( p_clut && ( p_clut->i_version == i_version ) )
661 bs_skip( s, 8 * i_segment_length - 12 );
668 msg_Dbg( p_dec, "new clut: %i", i_id );
670 p_clut = malloc( sizeof( dvbsub_clut_t ) );
673 p_clut->p_next = p_sys->p_cluts;
674 p_sys->p_cluts = p_clut;
677 /* Initialize to default clut */
678 p_next = p_clut->p_next;
679 *p_clut = p_sys->default_clut;
680 p_clut->p_next = p_next;
682 /* We don't have this version of the CLUT: Parse it */
683 p_clut->i_version = i_version;
685 bs_skip( s, 4 ); /* Reserved bits */
686 i_processed_length = 2;
687 while( i_processed_length < i_segment_length )
689 uint8_t y, cb, cr, t;
693 i_id = bs_read( s, 8 );
694 i_type = bs_read( s, 3 );
698 if( bs_read( s, 1 ) )
701 cr = bs_read( s, 8 );
702 cb = bs_read( s, 8 );
704 i_processed_length += 6;
708 y = bs_read( s, 6 ) << 2;
709 cr = bs_read( s, 4 ) << 4;
710 cb = bs_read( s, 4 ) << 4;
711 t = bs_read( s, 2 ) << 6;
712 i_processed_length += 4;
715 /* We are not entirely compliant here as full transparency is indicated
716 * with a luma value of zero, not a transparency value of 0xff
717 * (full transparency would actually be 0xff + 1). */
724 /* According to EN 300-743 section 7.2.3 note 1, type should
725 * not have more than 1 bit set to one, but some streams don't
726 * respect this note. */
727 if( ( i_type & 0x04 ) && ( i_id < 4 ) )
729 p_clut->c_2b[i_id].Y = y;
730 p_clut->c_2b[i_id].Cr = cr;
731 p_clut->c_2b[i_id].Cb = cb;
732 p_clut->c_2b[i_id].T = t;
734 if( ( i_type & 0x02 ) && ( i_id < 16 ) )
736 p_clut->c_4b[i_id].Y = y;
737 p_clut->c_4b[i_id].Cr = cr;
738 p_clut->c_4b[i_id].Cb = cb;
739 p_clut->c_4b[i_id].T = t;
743 p_clut->c_8b[i_id].Y = y;
744 p_clut->c_8b[i_id].Cr = cr;
745 p_clut->c_8b[i_id].Cb = cb;
746 p_clut->c_8b[i_id].T = t;
751 static void decode_page_composition( decoder_t *p_dec, bs_t *s )
753 decoder_sys_t *p_sys = p_dec->p_sys;
754 int i_version, i_state, i_segment_length, i_timeout, i;
756 /* A page is composed by 0 or more region */
757 i_segment_length = bs_read( s, 16 );
758 i_timeout = bs_read( s, 8 );
759 i_version = bs_read( s, 4 );
760 i_state = bs_read( s, 2 );
761 bs_skip( s, 2 ); /* Reserved */
763 if( i_state == DVBSUB_PCS_STATE_CHANGE )
765 /* End of an epoch, reset decoder buffer */
767 msg_Dbg( p_dec, "page composition mode change" );
771 else if( !p_sys->p_page && ( i_state != DVBSUB_PCS_STATE_ACQUISITION ) &&
772 ( i_state != DVBSUB_PCS_STATE_CHANGE ) )
774 /* Not a full PCS, we need to wait for one */
775 msg_Dbg( p_dec, "didn't receive an acquisition page yet" );
778 /* Try to start decoding even without an acquisition page */
779 bs_skip( s, 8 * (i_segment_length - 2) );
785 if( i_state == DVBSUB_PCS_STATE_ACQUISITION )
786 msg_Dbg( p_dec, "acquisition page composition" );
789 /* Check version number */
790 if( p_sys->p_page && ( p_sys->p_page->i_version == i_version ) )
792 bs_skip( s, 8 * (i_segment_length - 2) );
795 else if( p_sys->p_page )
797 if( p_sys->p_page->i_region_defs )
798 free( p_sys->p_page->p_region_defs );
799 p_sys->p_page->p_region_defs = NULL;
800 p_sys->p_page->i_region_defs = 0;
806 msg_Dbg( p_dec, "new page" );
808 /* Allocate a new page */
809 p_sys->p_page = malloc( sizeof(dvbsub_page_t) );
814 p_sys->p_page->i_version = i_version;
815 p_sys->p_page->i_timeout = i_timeout;
816 p_sys->b_page = true;
818 /* Number of regions */
819 p_sys->p_page->i_region_defs = (i_segment_length - 2) / 6;
821 if( p_sys->p_page->i_region_defs == 0 ) return;
823 p_sys->p_page->p_region_defs =
824 malloc( p_sys->p_page->i_region_defs * sizeof(dvbsub_region_t) );
825 if( p_sys->p_page->p_region_defs )
827 for( i = 0; i < p_sys->p_page->i_region_defs; i++ )
829 p_sys->p_page->p_region_defs[i].i_id = bs_read( s, 8 );
830 bs_skip( s, 8 ); /* Reserved */
831 p_sys->p_page->p_region_defs[i].i_x = bs_read( s, 16 );
832 p_sys->p_page->p_region_defs[i].i_y = bs_read( s, 16 );
835 msg_Dbg( p_dec, "page_composition, region %i (%i,%i)",
836 i, p_sys->p_page->p_region_defs[i].i_x,
837 p_sys->p_page->p_region_defs[i].i_y );
843 static void decode_region_composition( decoder_t *p_dec, bs_t *s )
845 decoder_sys_t *p_sys = p_dec->p_sys;
846 dvbsub_region_t *p_region, **pp_region = &p_sys->p_regions;
847 int i_segment_length, i_processed_length, i_id, i_version;
848 int i_width, i_height, i_level_comp, i_depth, i_clut;
849 int i_8_bg, i_4_bg, i_2_bg;
852 i_segment_length = bs_read( s, 16 );
853 i_id = bs_read( s, 8 );
854 i_version = bs_read( s, 4 );
856 /* Check if we already have this region */
857 for( p_region = p_sys->p_regions; p_region != NULL;
858 p_region = p_region->p_next )
860 pp_region = &p_region->p_next;
861 if( p_region->i_id == i_id ) break;
864 /* Check version number */
865 if( p_region && ( p_region->i_version == i_version ) )
867 bs_skip( s, 8 * (i_segment_length - 1) - 4 );
874 msg_Dbg( p_dec, "new region: %i", i_id );
876 p_region = *pp_region = malloc( sizeof(dvbsub_region_t) );
879 memset( p_region, 0, sizeof(dvbsub_region_t) );
880 p_region->p_object_defs = NULL;
881 p_region->p_pixbuf = NULL;
882 p_region->p_next = NULL;
885 /* Region attributes */
886 p_region->i_id = i_id;
887 p_region->i_version = i_version;
888 b_fill = bs_read( s, 1 );
889 bs_skip( s, 3 ); /* Reserved */
891 i_width = bs_read( s, 16 );
892 i_height = bs_read( s, 16 );
894 msg_Dbg( p_dec, " width=%d height=%d", i_width, i_height );
896 i_level_comp = bs_read( s, 3 );
897 i_depth = bs_read( s, 3 );
898 bs_skip( s, 2 ); /* Reserved */
899 i_clut = bs_read( s, 8 );
901 i_8_bg = bs_read( s, 8 );
902 i_4_bg = bs_read( s, 4 );
903 i_2_bg = bs_read( s, 2 );
904 bs_skip( s, 2 ); /* Reserved */
906 /* Free old object defs */
907 while( p_region->i_object_defs )
908 free( p_region->p_object_defs[--p_region->i_object_defs].psz_text );
910 free( p_region->p_object_defs );
911 p_region->p_object_defs = NULL;
913 /* Extra sanity checks */
914 if( ( p_region->i_width != i_width ) ||
915 ( p_region->i_height != i_height ) )
917 if( p_region->p_pixbuf )
919 msg_Dbg( p_dec, "region size changed (%dx%d->%dx%d)",
920 p_region->i_width, p_region->i_height, i_width, i_height );
921 free( p_region->p_pixbuf );
924 p_region->p_pixbuf = malloc( i_height * i_width );
925 p_region->i_depth = 0;
928 if( p_region->i_depth &&
929 ( ( p_region->i_depth != i_depth ) ||
930 ( p_region->i_level_comp != i_level_comp ) ||
931 ( p_region->i_clut != i_clut) ) )
933 msg_Dbg( p_dec, "region parameters changed (not allowed)" );
936 /* Erase background of region */
939 int i_background = ( p_region->i_depth == 1 ) ? i_2_bg :
940 ( ( p_region->i_depth == 2 ) ? i_4_bg : i_8_bg );
941 memset( p_region->p_pixbuf, i_background, i_width * i_height );
944 p_region->i_width = i_width;
945 p_region->i_height = i_height;
946 p_region->i_level_comp = i_level_comp;
947 p_region->i_depth = i_depth;
948 p_region->i_clut = i_clut;
950 /* List of objects in the region */
951 i_processed_length = 10;
952 while( i_processed_length < i_segment_length )
954 dvbsub_objectdef_t *p_obj;
956 /* We create a new object */
957 p_region->i_object_defs++;
958 p_region->p_object_defs =
959 realloc( p_region->p_object_defs,
960 sizeof(dvbsub_objectdef_t) * p_region->i_object_defs );
962 /* We parse object properties */
963 p_obj = &p_region->p_object_defs[p_region->i_object_defs - 1];
964 p_obj->i_id = bs_read( s, 16 );
965 p_obj->i_type = bs_read( s, 2 );
966 bs_skip( s, 2 ); /* Provider */
967 p_obj->i_x = bs_read( s, 12 );
968 bs_skip( s, 4 ); /* Reserved */
969 p_obj->i_y = bs_read( s, 12 );
970 p_obj->psz_text = NULL;
972 i_processed_length += 6;
974 if( ( p_obj->i_type == DVBSUB_OT_BASIC_CHAR ) ||
975 ( p_obj->i_type == DVBSUB_OT_COMPOSITE_STRING ) )
977 p_obj->i_fg_pc = bs_read( s, 8 );
978 p_obj->i_bg_pc = bs_read( s, 8 );
979 i_processed_length += 2;
984 /* ETSI 300 743 [7.2.1] */
985 static void decode_display_definition( decoder_t *p_dec, bs_t *s )
987 decoder_sys_t *p_sys = p_dec->p_sys;
988 uint16_t i_segment_length;
989 uint16_t i_processed_length = 40;
992 i_segment_length = bs_read( s, 16 );
993 i_version = bs_read( s, 4 );
995 /* Check version number */
996 if( p_sys->display.i_version == i_version )
998 /* The definition did not change */
999 bs_skip( s, 8*i_segment_length - 4 );
1004 msg_Dbg( p_dec, "new display definition: %i", i_version );
1007 /* We don't have this version of the display definition: Parse it */
1008 p_sys->display.i_version = i_version;
1009 p_sys->display.b_windowed = bs_read( s, 1 );
1010 bs_skip( s, 3 ); /* Reserved bits */
1011 p_sys->display.i_width = bs_read( s, 16 )+1;
1012 p_sys->display.i_height = bs_read( s, 16 )+1;
1014 if( p_sys->display.b_windowed )
1017 msg_Dbg( p_dec, "display definition with offsets (windowed)" );
1019 /* Coordinates are measured from the top left corner */
1020 p_sys->display.i_x = bs_read( s, 16 );
1021 p_sys->display.i_max_x = bs_read( s, 16 );
1022 p_sys->display.i_y = bs_read( s, 16 );
1023 p_sys->display.i_max_y = bs_read( s, 16 );
1024 i_processed_length += 64;
1028 /* if not windowed, setup the window variables to good defaults */
1029 /* not necessary, but to avoid future confusion.. */
1030 p_sys->display.i_x = 0;
1031 p_sys->display.i_max_x = p_sys->display.i_width-1;
1032 p_sys->display.i_y = 0;
1033 p_sys->display.i_max_y = p_sys->display.i_height-1;
1036 if( i_processed_length != i_segment_length*8 )
1038 msg_Err( p_dec, "processed length %d bytes != segment length %d bytes",
1039 i_processed_length / 8 , i_segment_length );
1043 msg_Dbg( p_dec, "version: %d, width: %d, height: %d",
1044 p_sys->display.i_version, p_sys->display.i_width, p_sys->display.i_height );
1045 if( p_sys->display.b_windowed )
1046 msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d",
1047 p_sys->display.i_x, p_sys->display.i_max_x, p_sys->display.i_y, p_sys->display.i_max_y );
1051 static void dvbsub_render_pdata( decoder_t *, dvbsub_region_t *, int, int,
1053 static void dvbsub_pdata2bpp( bs_t *, uint8_t *, int, int * );
1054 static void dvbsub_pdata4bpp( bs_t *, uint8_t *, int, int * );
1055 static void dvbsub_pdata8bpp( bs_t *, uint8_t *, int, int * );
1057 static void decode_object( decoder_t *p_dec, bs_t *s )
1059 decoder_sys_t *p_sys = p_dec->p_sys;
1060 dvbsub_region_t *p_region;
1061 int i_segment_length, i_coding_method, i_version, i_id, i;
1062 bool b_non_modify_color;
1064 /* ETSI 300-743 paragraph 7.2.4
1065 * sync_byte, segment_type and page_id have already been processed.
1067 i_segment_length = bs_read( s, 16 );
1068 i_id = bs_read( s, 16 );
1069 i_version = bs_read( s, 4 );
1070 i_coding_method = bs_read( s, 2 );
1072 if( i_coding_method > 1 )
1074 msg_Dbg( p_dec, "unknown DVB subtitling coding %d is not handled!", i_coding_method );
1075 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1079 /* Check if the object needs to be rendered in at least one
1081 for( p_region = p_sys->p_regions; p_region != NULL;
1082 p_region = p_region->p_next )
1084 for( i = 0; i < p_region->i_object_defs; i++ )
1085 if( p_region->p_object_defs[i].i_id == i_id ) break;
1087 if( i != p_region->i_object_defs ) break;
1091 bs_skip( s, 8 * (i_segment_length - 2) - 6 );
1096 msg_Dbg( p_dec, "new object: %i", i_id );
1099 b_non_modify_color = bs_read( s, 1 );
1100 bs_skip( s, 1 ); /* Reserved */
1102 if( i_coding_method == 0x00 )
1104 int i_topfield, i_bottomfield;
1105 uint8_t *p_topfield, *p_bottomfield;
1107 i_topfield = bs_read( s, 16 );
1108 i_bottomfield = bs_read( s, 16 );
1109 p_topfield = s->p_start + bs_pos( s ) / 8;
1110 p_bottomfield = p_topfield + i_topfield;
1112 bs_skip( s, 8 * (i_segment_length - 7) );
1115 if( ( i_segment_length < ( i_topfield + i_bottomfield + 7 ) ) ||
1116 ( ( p_topfield + i_topfield + i_bottomfield ) > s->p_end ) )
1118 msg_Dbg( p_dec, "corrupted object data" );
1122 for( p_region = p_sys->p_regions; p_region != NULL;
1123 p_region = p_region->p_next )
1125 for( i = 0; i < p_region->i_object_defs; i++ )
1127 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1129 dvbsub_render_pdata( p_dec, p_region,
1130 p_region->p_object_defs[i].i_x,
1131 p_region->p_object_defs[i].i_y,
1132 p_topfield, i_topfield );
1136 dvbsub_render_pdata( p_dec, p_region,
1137 p_region->p_object_defs[i].i_x,
1138 p_region->p_object_defs[i].i_y + 1,
1139 p_bottomfield, i_bottomfield );
1143 /* Duplicate the top field */
1144 dvbsub_render_pdata( p_dec, p_region,
1145 p_region->p_object_defs[i].i_x,
1146 p_region->p_object_defs[i].i_y + 1,
1147 p_topfield, i_topfield );
1154 /* DVB subtitling as characters */
1155 int i_number_of_codes = bs_read( s, 8 );
1156 uint8_t* p_start = s->p_start + bs_pos( s ) / 8;
1159 if( ( i_segment_length < ( i_number_of_codes*2 + 4 ) ) ||
1160 ( ( p_start + i_number_of_codes*2 ) > s->p_end ) )
1162 msg_Dbg( p_dec, "corrupted object data" );
1166 for( p_region = p_sys->p_regions; p_region != NULL;
1167 p_region = p_region->p_next )
1169 for( i = 0; i < p_region->i_object_defs; i++ )
1173 if( p_region->p_object_defs[i].i_id != i_id ) continue;
1175 p_region->p_object_defs[i].psz_text =
1176 realloc( p_region->p_object_defs[i].psz_text,
1177 i_number_of_codes + 1 );
1179 /* FIXME 16bits -> char ??? See Preamble */
1180 for( j = 0; j < i_number_of_codes; j++ )
1182 p_region->p_object_defs[i].psz_text[j] = (char)(bs_read( s, 16 ) & 0xFF);
1184 /* Null terminate the string */
1185 p_region->p_object_defs[i].psz_text[j] = 0;
1191 msg_Dbg( p_dec, "end object: %i", i_id );
1195 static void dvbsub_render_pdata( decoder_t *p_dec, dvbsub_region_t *p_region,
1197 uint8_t *p_field, int i_field )
1204 if( !p_region->p_pixbuf )
1206 msg_Err( p_dec, "region %i has no pixel buffer!", p_region->i_id );
1209 if( i_y < 0 || i_x < 0 || i_y >= p_region->i_height ||
1210 i_x >= p_region->i_width )
1212 msg_Dbg( p_dec, "invalid offset (%i,%i)", i_x, i_y );
1216 p_pixbuf = p_region->p_pixbuf + i_y * p_region->i_width;
1217 bs_init( &bs, p_field, i_field );
1219 while( !bs_eof( &bs ) )
1222 if( i_y >= p_region->i_height ) return;
1224 switch( bs_read( &bs, 8 ) )
1227 dvbsub_pdata2bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1232 dvbsub_pdata4bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1237 dvbsub_pdata8bpp( &bs, p_pixbuf + i_x, p_region->i_width - i_x,
1244 /* We don't use map tables */
1247 case 0xf0: /* End of line code */
1248 p_pixbuf += 2*p_region->i_width;
1249 i_offset = 0; i_y += 2;
1255 static void dvbsub_pdata2bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1257 bool b_stop = false;
1259 while( !b_stop && !bs_eof( s ) )
1261 int i_count = 0, i_color = 0;
1263 i_color = bs_read( s, 2 );
1264 if( i_color != 0x00 )
1270 if( bs_read( s, 1 ) == 0x01 ) // Switch1
1272 i_count = 3 + bs_read( s, 3 );
1273 i_color = bs_read( s, 2 );
1277 if( bs_read( s, 1 ) == 0x00 ) //Switch2
1279 switch( bs_read( s, 2 ) ) //Switch3
1288 i_count = 12 + bs_read( s, 4 );
1289 i_color = bs_read( s, 2 );
1292 i_count = 29 + bs_read( s, 8 );
1293 i_color = bs_read( s, 2 );
1301 /* 1 pixel color 0 */
1307 if( !i_count ) continue;
1310 if( ( i_count + *pi_off ) > i_width ) break;
1312 if( i_count == 1 ) p[*pi_off] = i_color;
1313 else memset( ( p + *pi_off ), i_color, i_count );
1315 (*pi_off) += i_count;
1321 static void dvbsub_pdata4bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1323 bool b_stop = false;
1325 while( !b_stop && !bs_eof( s ) )
1327 int i_count = 0, i_color = 0;
1329 i_color = bs_read( s, 4 );
1330 if( i_color != 0x00 )
1337 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1339 if( bs_show( s, 3 ) != 0x00 )
1341 i_count = 2 + bs_read( s, 3 );
1351 if( bs_read( s, 1 ) == 0x00) //Switch2
1353 i_count = 4 + bs_read( s, 2 );
1354 i_color = bs_read( s, 4 );
1358 switch ( bs_read( s, 2 ) ) //Switch3
1367 i_count = 9 + bs_read( s, 4 );
1368 i_color = bs_read( s, 4 );
1371 i_count= 25 + bs_read( s, 8 );
1372 i_color = bs_read( s, 4 );
1379 if( !i_count ) continue;
1382 if( ( i_count + *pi_off ) > i_width ) break;
1384 if( i_count == 1 ) p[*pi_off] = i_color;
1385 else memset( ( p + *pi_off ), i_color, i_count );
1387 (*pi_off) += i_count;
1393 static void dvbsub_pdata8bpp( bs_t *s, uint8_t *p, int i_width, int *pi_off )
1395 bool b_stop = false;
1397 while( !b_stop && !bs_eof( s ) )
1399 int i_count = 0, i_color = 0;
1401 i_color = bs_read( s, 8 );
1402 if( i_color != 0x00 )
1409 if( bs_read( s, 1 ) == 0x00 ) // Switch1
1411 if( bs_show( s, 7 ) != 0x00 )
1413 i_count = bs_read( s, 7 );
1423 i_count = bs_read( s, 7 );
1424 i_color = bs_read( s, 8 );
1428 if( !i_count ) continue;
1431 if( ( i_count + *pi_off ) > i_width ) break;
1433 if( i_count == 1 ) p[*pi_off] = i_color;
1434 else memset( ( p + *pi_off ), i_color, i_count );
1436 (*pi_off) += i_count;
1442 static void free_all( decoder_t *p_dec )
1444 decoder_sys_t *p_sys = p_dec->p_sys;
1445 dvbsub_region_t *p_reg, *p_reg_next;
1446 dvbsub_clut_t *p_clut, *p_clut_next;
1448 /*free( p_sys->p_display ); No longer malloced */
1450 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next )
1452 p_clut_next = p_clut->p_next;
1455 p_sys->p_cluts = NULL;
1457 for( p_reg = p_sys->p_regions; p_reg != NULL; p_reg = p_reg_next )
1461 p_reg_next = p_reg->p_next;
1462 for( i = 0; i < p_reg->i_object_defs; i++ )
1463 free( p_reg->p_object_defs[i].psz_text );
1464 if( p_reg->i_object_defs ) free( p_reg->p_object_defs );
1465 free( p_reg->p_pixbuf );
1468 p_sys->p_regions = NULL;
1472 if( p_sys->p_page->i_region_defs )
1473 free( p_sys->p_page->p_region_defs );
1474 free( p_sys->p_page );
1476 p_sys->p_page = NULL;
1479 static subpicture_t *render( decoder_t *p_dec )
1481 decoder_sys_t *p_sys = p_dec->p_sys;
1482 subpicture_t *p_spu;
1483 subpicture_region_t **pp_spu_region;
1484 int i, j, i_timeout = 0;
1488 /* Allocate the subpicture internal data. */
1489 p_spu = decoder_NewSubpicture( p_dec );
1493 p_spu->b_absolute = p_sys->b_absolute;
1494 /* Set the pf_render callback */
1495 p_spu->i_start = (mtime_t) p_sys->i_pts;
1496 //p_spu->i_stop = (mtime_t) 0;
1497 p_spu->b_ephemer = true;
1498 //p_spu->b_fade = true;
1499 //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000);
1501 /* Correct positioning of SPU */
1502 i_base_x = p_sys->i_spu_x;
1503 i_base_y = p_sys->i_spu_y;
1504 p_spu->i_original_picture_width = 720;
1505 p_spu->i_original_picture_height = 576;
1507 p_spu->i_original_picture_width = p_sys->display.i_width;
1508 p_spu->i_original_picture_height = p_sys->display.i_height;
1510 if( p_sys->display.b_windowed )
1512 /* From en_300743v01 - */
1513 /* the DDS is there to indicate intended size/position of text */
1514 /* the intended video area is ->i_width/height */
1515 /* the window is within this... SO... we should leave i_original_picture_width etc. as is */
1516 /* and ONLY change i_base_x. effectively i_max_x/y are only there to limit memory requirements*/
1517 /* we COULD use the upper limits to limit rendering to within these? */
1519 /* see notes on DDS at the top of the file */
1520 i_base_x += p_sys->display.i_x;
1521 i_base_y += p_sys->display.i_y;
1524 pp_spu_region = &p_spu->p_region;
1526 /* Loop on region definitions */
1529 msg_Dbg( p_dec, "rendering %i regions", p_sys->p_page->i_region_defs );
1532 for( i = 0; p_sys->p_page && ( i < p_sys->p_page->i_region_defs ); i++ )
1534 dvbsub_region_t *p_region;
1535 dvbsub_regiondef_t *p_regiondef;
1536 dvbsub_clut_t *p_clut;
1537 dvbsub_color_t *p_color;
1538 subpicture_region_t *p_spu_region;
1539 uint8_t *p_src, *p_dst;
1541 video_palette_t palette;
1544 i_timeout = p_sys->p_page->i_timeout;
1546 p_regiondef = &p_sys->p_page->p_region_defs[i];
1548 /* Find associated region */
1549 for( p_region = p_sys->p_regions; p_region != NULL;
1550 p_region = p_region->p_next )
1552 if( p_regiondef->i_id == p_region->i_id ) break;
1556 /* if a region exists, then print it's size */
1559 msg_Dbg( p_dec, "rendering region %i (%i,%i) to (%i,%i)", i,
1560 p_regiondef->i_x, p_regiondef->i_y,
1561 p_regiondef->i_x + p_region->i_width,
1562 p_regiondef->i_y + p_region->i_height );
1566 msg_Dbg( p_dec, "rendering region %i (%i,%i) (no region matched to render)", i,
1567 p_regiondef->i_x, p_regiondef->i_y );
1573 msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id );
1577 /* Find associated CLUT */
1578 for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut->p_next )
1580 if( p_region->i_clut == p_clut->i_id ) break;
1584 msg_Dbg( p_dec, "clut %i not found", p_region->i_clut );
1588 /* FIXME: don't create a subpicture region with VLC CODEC YUVP
1589 * when it actually is a TEXT region */
1591 /* Create new SPU region */
1592 memset( &fmt, 0, sizeof(video_format_t) );
1593 fmt.i_chroma = VLC_CODEC_YUVP;
1594 fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */
1595 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1596 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1597 fmt.i_x_offset = fmt.i_y_offset = 0;
1598 fmt.p_palette = &palette;
1599 fmt.p_palette->i_entries = ( p_region->i_depth == 1 ) ? 4 :
1600 ( ( p_region->i_depth == 2 ) ? 16 : 256 );
1601 p_color = ( p_region->i_depth == 1 ) ? p_clut->c_2b :
1602 ( ( p_region->i_depth == 2 ) ? p_clut->c_4b : p_clut->c_8b );
1603 for( j = 0; j < fmt.p_palette->i_entries; j++ )
1605 fmt.p_palette->palette[j][0] = p_color[j].Y;
1606 fmt.p_palette->palette[j][1] = p_color[j].Cb; /* U == Cb */
1607 fmt.p_palette->palette[j][2] = p_color[j].Cr; /* V == Cr */
1608 fmt.p_palette->palette[j][3] = 0xff - p_color[j].T;
1611 p_spu_region = subpicture_region_New( &fmt );
1614 msg_Err( p_dec, "cannot allocate SPU region" );
1617 p_spu_region->i_x = i_base_x + p_regiondef->i_x;
1618 p_spu_region->i_y = i_base_y + p_regiondef->i_y;
1619 p_spu_region->i_align = p_sys->i_spu_position;
1620 *pp_spu_region = p_spu_region;
1621 pp_spu_region = &p_spu_region->p_next;
1623 p_src = p_region->p_pixbuf;
1624 p_dst = p_spu_region->p_picture->Y_PIXELS;
1625 i_pitch = p_spu_region->p_picture->Y_PITCH;
1627 /* Copy pixel buffer */
1628 for( j = 0; j < p_region->i_height; j++ )
1630 memcpy( p_dst, p_src, p_region->i_width );
1631 p_src += p_region->i_width;
1635 /* Check subtitles encoded as strings of characters
1636 * (since there are not rendered in the pixbuffer) */
1637 for( j = 0; j < p_region->i_object_defs; j++ )
1639 dvbsub_objectdef_t *p_object_def = &p_region->p_object_defs[j];
1641 if( ( p_object_def->i_type != 1 ) || !p_object_def->psz_text )
1644 /* Create new SPU region */
1645 memset( &fmt, 0, sizeof(video_format_t) );
1646 fmt.i_chroma = VLC_CODEC_TEXT;
1647 fmt.i_aspect = VOUT_ASPECT_FACTOR;
1648 fmt.i_width = fmt.i_visible_width = p_region->i_width;
1649 fmt.i_height = fmt.i_visible_height = p_region->i_height;
1650 fmt.i_x_offset = fmt.i_y_offset = 0;
1651 p_spu_region = subpicture_region_New( &fmt );
1654 msg_Err( p_dec, "cannot allocate SPU region" );
1658 p_spu_region->psz_text = strdup( p_object_def->psz_text );
1659 p_spu_region->i_x = i_base_x + p_regiondef->i_x + p_object_def->i_x;
1660 p_spu_region->i_y = i_base_y + p_regiondef->i_y + p_object_def->i_y;
1661 p_spu_region->i_align = p_sys->i_spu_position;
1662 *pp_spu_region = p_spu_region;
1663 pp_spu_region = &p_spu_region->p_next;
1670 /*****************************************************************************
1671 * encoder_sys_t : encoder descriptor
1672 *****************************************************************************/
1673 typedef struct encoder_region_t
1680 struct encoder_sys_t
1682 unsigned int i_page_ver;
1683 unsigned int i_region_ver;
1684 unsigned int i_clut_ver;
1687 encoder_region_t *p_regions;
1691 /* subpicture positioning */
1696 static void encode_page_composition( encoder_t *, bs_t *, subpicture_t * );
1697 static void encode_clut( encoder_t *, bs_t *, subpicture_t * );
1698 static void encode_region_composition( encoder_t *, bs_t *, subpicture_t * );
1699 static void encode_object( encoder_t *, bs_t *, subpicture_t * );
1701 /*****************************************************************************
1702 * OpenEncoder: probe the encoder and return score
1703 *****************************************************************************/
1704 static int OpenEncoder( vlc_object_t *p_this )
1706 encoder_t *p_enc = (encoder_t *)p_this;
1707 encoder_sys_t *p_sys;
1710 if( ( p_enc->fmt_out.i_codec != VLC_CODEC_DVBS ) &&
1713 return VLC_EGENERIC;
1716 /* Allocate the memory needed to store the decoder's structure */
1717 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
1719 p_enc->p_sys = p_sys;
1721 p_enc->pf_encode_sub = Encode;
1722 p_enc->fmt_out.i_codec = VLC_CODEC_DVBS;
1723 p_enc->fmt_out.subs.dvb.i_id = 1 << 16 | 1;
1725 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
1727 p_sys->i_page_ver = 0;
1728 p_sys->i_region_ver = 0;
1729 p_sys->i_clut_ver = 0;
1730 p_sys->i_regions = 0;
1731 p_sys->p_regions = 0;
1733 var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1734 var_Get( p_this, ENC_CFG_PREFIX "x", &val );
1735 p_sys->i_offset_x = val.i_int;
1736 var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
1737 var_Get( p_this, ENC_CFG_PREFIX "y", &val );
1738 p_sys->i_offset_y = val.i_int;
1743 /* FIXME: this routine is a hack to convert VLC_CODEC_YUVA
1744 * into VLC_CODEC_YUVP
1746 static subpicture_t *YuvaYuvp( subpicture_t *p_subpic )
1748 subpicture_region_t *p_region = NULL;
1750 if( !p_subpic ) return NULL;
1752 for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
1754 video_format_t *p_fmt = &p_region->fmt;
1755 int i = 0, j = 0, n = 0, p = 0;
1756 int i_max_entries = 256;
1758 #ifdef RANDOM_DITHERING
1759 int i_seed = 0xdeadbeef; /* random seed */
1763 int i_pixels = p_region->p_picture->p[0].i_visible_lines
1764 * p_region->p_picture->p[0].i_pitch;
1765 int i_iterator = p_region->p_picture->p[0].i_visible_lines * 3 / 4
1766 * p_region->p_picture->p[0].i_pitch
1767 + p_region->p_picture->p[0].i_pitch * 1 / 3;
1768 int i_tolerance = 0;
1770 #ifdef DEBUG_DVBSUB1
1771 /* p_enc not valid here */
1772 msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator );
1774 p_fmt->i_chroma = VLC_CODEC_YUVP;
1775 p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
1776 if( !p_fmt->p_palette ) break;
1777 p_fmt->p_palette->i_entries = 0;
1779 /* Find best iterator using Euclide’s algorithm */
1780 for( ; i_iterator > 1 ; i_iterator-- )
1799 /* Count colors, build best palette */
1800 for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
1802 bool b_success = true;
1803 p_fmt->p_palette->i_entries = 0;
1805 for( i = 0; i < i_pixels ; )
1808 y = p_region->p_picture->p[0].p_pixels[i];
1809 u = p_region->p_picture->p[1].p_pixels[i];
1810 v = p_region->p_picture->p[2].p_pixels[i];
1811 a = p_region->p_picture->p[3].p_pixels[i];
1812 for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
1814 if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
1815 abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
1816 abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
1817 abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
1822 if( j == p_fmt->p_palette->i_entries )
1824 p_fmt->p_palette->palette[j][0] = y;
1825 p_fmt->p_palette->palette[j][1] = u;
1826 p_fmt->p_palette->palette[j][2] = v;
1827 p_fmt->p_palette->palette[j][3] = a;
1828 p_fmt->p_palette->i_entries++;
1830 if( p_fmt->p_palette->i_entries >= i_max_entries )
1848 #ifdef DEBUG_DVBSUB1
1849 /* p_enc not valid here */
1850 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1853 #ifndef RANDOM_DITHERING
1854 pi_delta = malloc( ( p_region->p_picture->p[0].i_pitch + 1 )
1855 * sizeof(int) * 4 );
1856 for( i = 0; i < (p_region->p_picture->p[0].i_pitch + 1) * 4 ; i++ )
1862 /* Fill image with our new colours */
1863 for( p = 0; p < p_region->p_picture->p[0].i_visible_lines ; p++ )
1865 int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
1867 for( n = 0; n < p_region->p_picture->p[0].i_pitch ; n++ )
1869 int i_offset = p * p_region->p_picture->p[0].i_pitch + n;
1871 int i_mindist, i_best;
1873 y = (int)p_region->p_picture->p[0].p_pixels[i_offset];
1874 u = (int)p_region->p_picture->p[1].p_pixels[i_offset];
1875 v = (int)p_region->p_picture->p[2].p_pixels[i_offset];
1876 a = (int)p_region->p_picture->p[3].p_pixels[i_offset];
1878 /* Add dithering compensation */
1879 #ifdef RANDOM_DITHERING
1880 y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
1881 u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
1882 v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
1883 a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
1885 y += i_ydelta + pi_delta[ n * 4 ];
1886 u += i_udelta + pi_delta[ n * 4 + 1 ];
1887 v += i_vdelta + pi_delta[ n * 4 + 2 ];
1888 a += i_adelta + pi_delta[ n * 4 + 3 ];
1891 /* Find best colour in palette */
1892 for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
1896 i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
1897 i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
1898 i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
1899 i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
1901 if( i_dist < i_mindist )
1908 /* Set pixel to best color */
1909 p_region->p_picture->p[0].p_pixels[i_offset] = i_best;
1911 /* Update dithering state */
1912 #ifdef RANDOM_DITHERING
1913 i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
1915 i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
1916 i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
1917 i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
1918 i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
1919 pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
1920 pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
1921 pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
1922 pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
1923 i_ydelta = i_ydelta * 5 / 8;
1924 i_udelta = i_udelta * 5 / 8;
1925 i_vdelta = i_vdelta * 5 / 8;
1926 i_adelta = i_adelta * 5 / 8;
1930 #ifndef RANDOM_DITHERING
1935 for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
1937 p_fmt->p_palette->palette[i][0] = 0;
1938 p_fmt->p_palette->palette[i][1] = 0;
1939 p_fmt->p_palette->palette[i][2] = 0;
1940 p_fmt->p_palette->palette[i][3] = 0;
1942 p_fmt->p_palette->i_entries = i_max_entries;
1943 #ifdef DEBUG_DVBSUB1
1944 /* p_enc not valid here */
1945 msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
1951 /****************************************************************************
1952 * Encode: the whole thing
1953 ****************************************************************************/
1954 static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
1956 subpicture_t *p_temp = NULL;
1957 subpicture_region_t *p_region = NULL;
1958 bs_t bits, *s = &bits;
1961 if( !p_subpic || !p_subpic->p_region ) return NULL;
1963 /* FIXME: this is a hack to convert VLC_CODEC_YUVA into
1966 p_region = p_subpic->p_region;
1967 if( p_region->fmt.i_chroma == VLC_CODEC_YUVA )
1969 p_temp = YuvaYuvp( p_subpic );
1972 msg_Err( p_enc, "no picture in subpicture" );
1975 p_region = p_subpic->p_region;
1979 if( !p_region ) return NULL;
1981 if( ( p_region->fmt.i_chroma != VLC_CODEC_TEXT ) &&
1982 ( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) )
1985 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
1986 vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc );
1987 msg_Err( p_enc, "chroma %4s not supported", psz_fourcc );
1991 if( p_region->fmt.p_palette )
1993 switch( p_region->fmt.p_palette->i_entries )
2001 msg_Err( p_enc, "subpicture palette (%d) not handled",
2002 p_region->fmt.p_palette->i_entries );
2009 msg_Dbg( p_enc, "encoding subpicture" );
2011 p_block = block_New( p_enc, 64000 );
2012 bs_init( s, p_block->p_buffer, p_block->i_buffer );
2014 bs_write( s, 8, 0x20 ); /* Data identifier */
2015 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
2017 encode_page_composition( p_enc, s, p_subpic );
2018 encode_region_composition( p_enc, s, p_subpic );
2019 encode_clut( p_enc, s, p_subpic );
2020 encode_object( p_enc, s, p_subpic );
2022 /* End of display */
2023 bs_write( s, 8, 0x0f ); /* Sync byte */
2024 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
2025 bs_write( s, 16, 1 ); /* Page id */
2026 bs_write( s, 16, 0 ); /* Segment length */
2028 bs_write( s, 8, 0xff );/* End marker */
2029 p_block->i_buffer = bs_pos( s ) / 8;
2030 p_block->i_pts = p_block->i_dts = p_subpic->i_start;
2031 if( !p_subpic->b_ephemer && ( p_subpic->i_stop > p_subpic->i_start ) )
2033 block_t *p_block_stop;
2035 p_block->i_length = p_subpic->i_stop - p_subpic->i_start;
2037 /* Send another (empty) subtitle to signal the end of display */
2038 p_block_stop = block_New( p_enc, 64000 );
2039 bs_init( s, p_block_stop->p_buffer, p_block_stop->i_buffer );
2040 bs_write( s, 8, 0x20 ); /* Data identifier */
2041 bs_write( s, 8, 0x0 ); /* Subtitle stream id */
2042 encode_page_composition( p_enc, s, 0 );
2043 bs_write( s, 8, 0x0f ); /* Sync byte */
2044 bs_write( s, 8, DVBSUB_ST_ENDOFDISPLAY ); /* Segment type */
2045 bs_write( s, 16, 1 ); /* Page id */
2046 bs_write( s, 16, 0 ); /* Segment length */
2047 bs_write( s, 8, 0xff );/* End marker */
2048 p_block_stop->i_buffer = bs_pos( s ) / 8;
2049 p_block_stop->i_pts = p_block_stop->i_dts = p_subpic->i_stop;
2050 block_ChainAppend( &p_block, p_block_stop );
2051 p_block_stop->i_length = 100000; /* p_subpic->i_stop - p_subpic->i_start; */
2054 msg_Dbg( p_enc, "subpicture encoded properly" );
2059 /*****************************************************************************
2060 * CloseEncoder: encoder destruction
2061 *****************************************************************************/
2062 static void CloseEncoder( vlc_object_t *p_this )
2064 encoder_t *p_enc = (encoder_t *)p_this;
2065 encoder_sys_t *p_sys = p_enc->p_sys;
2067 var_Destroy( p_this , ENC_CFG_PREFIX "x" );
2068 var_Destroy( p_this , ENC_CFG_PREFIX "y" );
2069 var_Destroy( p_this , ENC_CFG_PREFIX "timeout" );
2071 if( p_sys->i_regions ) free( p_sys->p_regions );
2075 static void encode_page_composition( encoder_t *p_enc, bs_t *s,
2076 subpicture_t *p_subpic )
2078 encoder_sys_t *p_sys = p_enc->p_sys;
2079 subpicture_region_t *p_region;
2080 bool b_mode_change = false;
2081 int i_regions, i_timeout;
2083 bs_write( s, 8, 0x0f ); /* Sync byte */
2084 bs_write( s, 8, DVBSUB_ST_PAGE_COMPOSITION ); /* Segment type */
2085 bs_write( s, 16, 1 ); /* Page id */
2087 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2088 p_region; p_region = p_region->p_next, i_regions++ )
2090 if( i_regions >= p_sys->i_regions )
2092 encoder_region_t region;
2093 region.i_width = region.i_height = 0;
2095 realloc( p_sys->p_regions, sizeof(encoder_region_t) *
2096 (p_sys->i_regions + 1) );
2097 p_sys->p_regions[p_sys->i_regions++] = region;
2100 if( ( p_sys->p_regions[i_regions].i_width <
2101 (int)p_region->fmt.i_visible_width ) ||
2102 ( p_sys->p_regions[i_regions].i_width >
2103 (int)p_region->fmt.i_visible_width ) )
2105 b_mode_change = true;
2106 msg_Dbg( p_enc, "region %i width change: %i -> %i",
2107 i_regions, p_sys->p_regions[i_regions].i_width,
2108 p_region->fmt.i_visible_width );
2109 p_sys->p_regions[i_regions].i_width =
2110 p_region->fmt.i_visible_width;
2112 if( p_sys->p_regions[i_regions].i_height <
2113 (int)p_region->fmt.i_visible_height )
2115 b_mode_change = true;
2116 msg_Dbg( p_enc, "region %i height change: %i -> %i",
2117 i_regions, p_sys->p_regions[i_regions].i_height,
2118 p_region->fmt.i_visible_height );
2119 p_sys->p_regions[i_regions].i_height =
2120 p_region->fmt.i_visible_height;
2124 bs_write( s, 16, i_regions * 6 + 2 ); /* Segment length */
2127 if( p_subpic && !p_subpic->b_ephemer &&
2128 ( p_subpic->i_stop > p_subpic->i_start ) )
2130 i_timeout = (p_subpic->i_stop - p_subpic->i_start) / 1000000;
2133 bs_write( s, 8, i_timeout ); /* Timeout */
2134 bs_write( s, 4, p_sys->i_page_ver++ );
2135 bs_write( s, 2, b_mode_change ?
2136 DVBSUB_PCS_STATE_CHANGE : DVBSUB_PCS_STATE_ACQUISITION );
2137 bs_write( s, 2, 0 ); /* Reserved */
2139 for( i_regions = 0, p_region = p_subpic ? p_subpic->p_region : 0;
2140 p_region; p_region = p_region->p_next, i_regions++ )
2142 bs_write( s, 8, i_regions );
2143 bs_write( s, 8, 0 ); /* Reserved */
2144 if( (p_sys->i_offset_x > 0) && (p_sys->i_offset_y > 0) )
2146 bs_write( s, 16, p_sys->i_offset_x ); /* override x position */
2147 bs_write( s, 16, p_sys->i_offset_y ); /* override y position */
2151 bs_write( s, 16, p_region->i_x );
2152 bs_write( s, 16, p_region->i_y );
2157 static void encode_clut( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2159 encoder_sys_t *p_sys = p_enc->p_sys;
2160 subpicture_region_t *p_region = p_subpic->p_region;
2161 video_palette_t *p_pal, pal;
2165 if( !p_region ) return;
2167 if( p_region->fmt.i_chroma == VLC_CODEC_YUVP )
2169 p_pal = p_region->fmt.p_palette;
2174 for( i = 0; i < 4; i++ )
2176 pal.palette[i][0] = 0;
2177 pal.palette[i][1] = 0;
2178 pal.palette[i][2] = 0;
2179 pal.palette[i][3] = 0;
2184 bs_write( s, 8, 0x0f ); /* Sync byte */
2185 bs_write( s, 8, DVBSUB_ST_CLUT_DEFINITION ); /* Segment type */
2186 bs_write( s, 16, 1 ); /* Page id */
2188 bs_write( s, 16, p_pal->i_entries * 6 + 2 ); /* Segment length */
2189 bs_write( s, 8, 1 ); /* Clut id */
2190 bs_write( s, 4, p_sys->i_clut_ver++ );
2191 bs_write( s, 4, 0 ); /* Reserved */
2193 for( i = 0; i < p_pal->i_entries; i++ )
2195 bs_write( s, 8, i ); /* Clut entry id */
2196 bs_write( s, 1, p_pal->i_entries == 4 ); /* 2bit/entry flag */
2197 bs_write( s, 1, p_pal->i_entries == 16 ); /* 4bit/entry flag */
2198 bs_write( s, 1, p_pal->i_entries == 256 ); /* 8bit/entry flag */
2199 bs_write( s, 4, 0 ); /* Reserved */
2200 bs_write( s, 1, 1 ); /* Full range flag */
2201 bs_write( s, 8, p_pal->palette[i][3] ? /* Y value */
2202 (p_pal->palette[i][0] ? p_pal->palette[i][0] : 16) : 0 );
2203 bs_write( s, 8, p_pal->palette[i][1] ); /* Cr value */
2204 bs_write( s, 8, p_pal->palette[i][2] ); /* Cb value */
2205 bs_write( s, 8, 0xff - p_pal->palette[i][3] ); /* T value */
2209 static void encode_region_composition( encoder_t *p_enc, bs_t *s,
2210 subpicture_t *p_subpic )
2212 encoder_sys_t *p_sys = p_enc->p_sys;
2213 subpicture_region_t *p_region;
2216 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2217 p_region = p_region->p_next, i_region++ )
2219 int i_entries = 4, i_depth = 0x1, i_bg = 0;
2221 ( p_region->fmt.i_chroma == VLC_CODEC_TEXT );
2225 video_palette_t *p_pal = p_region->fmt.p_palette;
2229 msg_Err( p_enc, "subpicture has no palette - ignoring it" );
2233 i_entries = p_pal->i_entries;
2234 i_depth = i_entries == 4 ? 0x1 : i_entries == 16 ? 0x2 : 0x3;
2236 for( i_bg = 0; i_bg < p_pal->i_entries; i_bg++ )
2238 if( !p_pal->palette[i_bg][3] ) break;
2242 bs_write( s, 8, 0x0f ); /* Sync byte */
2243 bs_write( s, 8, DVBSUB_ST_REGION_COMPOSITION ); /* Segment type */
2244 bs_write( s, 16, 1 ); /* Page id */
2246 bs_write( s, 16, 10 + 6 + (b_text ? 2 : 0) ); /* Segment length */
2247 bs_write( s, 8, i_region );
2248 bs_write( s, 4, p_sys->i_region_ver++ );
2250 /* Region attributes */
2251 bs_write( s, 1, i_bg < i_entries ); /* Fill */
2252 bs_write( s, 3, 0 ); /* Reserved */
2253 bs_write( s, 16, p_sys->p_regions[i_region].i_width );
2254 bs_write( s, 16, p_sys->p_regions[i_region].i_height );
2255 bs_write( s, 3, i_depth ); /* Region level of compatibility */
2256 bs_write( s, 3, i_depth ); /* Region depth */
2257 bs_write( s, 2, 0 ); /* Reserved */
2258 bs_write( s, 8, 1 ); /* Clut id */
2259 bs_write( s, 8, i_bg ); /* region 8bit pixel code */
2260 bs_write( s, 4, i_bg ); /* region 4bit pixel code */
2261 bs_write( s, 2, i_bg ); /* region 2bit pixel code */
2262 bs_write( s, 2, 0 ); /* Reserved */
2264 /* In our implementation we only have 1 object per region */
2265 bs_write( s, 16, i_region );
2266 bs_write( s, 2, b_text ? DVBSUB_OT_BASIC_CHAR:DVBSUB_OT_BASIC_BITMAP );
2267 bs_write( s, 2, 0 ); /* object provider flag */
2268 bs_write( s, 12, 0 );/* object horizontal position */
2269 bs_write( s, 4, 0 ); /* Reserved */
2270 bs_write( s, 12, 0 );/* object vertical position */
2274 bs_write( s, 8, 1 ); /* foreground pixel code */
2275 bs_write( s, 8, 0 ); /* background pixel code */
2280 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2281 subpicture_region_t *p_region,
2284 static void encode_object( encoder_t *p_enc, bs_t *s, subpicture_t *p_subpic )
2286 encoder_sys_t *p_sys = p_enc->p_sys;
2287 subpicture_region_t *p_region;
2290 int i_length_pos, i_update_pos, i_pixel_data_pos;
2292 for( i_region = 0, p_region = p_subpic->p_region; p_region;
2293 p_region = p_region->p_next, i_region++ )
2295 bs_write( s, 8, 0x0f ); /* Sync byte */
2296 bs_write( s, 8, DVBSUB_ST_OBJECT_DATA ); /* Segment type */
2297 bs_write( s, 16, 1 ); /* Page id */
2299 i_length_pos = bs_pos( s );
2300 bs_write( s, 16, 0 ); /* Segment length */
2301 bs_write( s, 16, i_region ); /* Object id */
2302 bs_write( s, 4, p_sys->i_region_ver++ );
2304 /* object coding method */
2305 switch( p_region->fmt.i_chroma )
2307 case VLC_CODEC_YUVP:
2308 bs_write( s, 2, 0 );
2310 case VLC_CODEC_TEXT:
2311 bs_write( s, 2, 1 );
2314 msg_Err( p_enc, "FOURCC %d not supported by encoder.", p_region->fmt.i_chroma );
2318 bs_write( s, 1, 0 ); /* non modifying color flag */
2319 bs_write( s, 1, 0 ); /* Reserved */
2321 if( p_region->fmt.i_chroma == VLC_CODEC_TEXT )
2325 if( !p_region->psz_text ) continue;
2327 i_size = __MIN( strlen( p_region->psz_text ), 256 );
2329 bs_write( s, 8, i_size ); /* number of characters in string */
2330 for( i = 0; i < i_size; i++ )
2332 bs_write( s, 16, p_region->psz_text[i] );
2335 /* Update segment length */
2336 SetWBE( &s->p_start[i_length_pos/8],
2337 (bs_pos(s) - i_length_pos)/8 -2 );
2341 /* Coding of a bitmap object */
2342 i_update_pos = bs_pos( s );
2343 bs_write( s, 16, 0 ); /* topfield data block length */
2344 bs_write( s, 16, 0 ); /* bottomfield data block length */
2347 i_pixel_data_pos = bs_pos( s );
2348 encode_pixel_data( p_enc, s, p_region, true );
2349 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2350 SetWBE( &s->p_start[i_update_pos/8], i_pixel_data_pos );
2353 i_pixel_data_pos = bs_pos( s );
2354 encode_pixel_data( p_enc, s, p_region, false );
2355 i_pixel_data_pos = ( bs_pos( s ) - i_pixel_data_pos ) / 8;
2356 SetWBE( &s->p_start[i_update_pos/8+2], i_pixel_data_pos );
2358 /* Stuffing for word alignment */
2360 if( bs_pos( s ) % 16 ) bs_write( s, 8, 0 );
2362 /* Update segment length */
2363 SetWBE( &s->p_start[i_length_pos/8], (bs_pos(s) - i_length_pos)/8 -2 );
2367 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2369 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2371 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2373 static void encode_pixel_data( encoder_t *p_enc, bs_t *s,
2374 subpicture_region_t *p_region,
2377 unsigned int i_line;
2380 if( p_region->fmt.i_chroma != VLC_CODEC_YUVP ) return;
2382 /* Encode line by line */
2383 for( i_line = !b_top; i_line < p_region->fmt.i_visible_height;
2386 switch( p_region->fmt.p_palette->i_entries )
2392 bs_write( s, 8, 0x10 ); /* 2 bit/pixel code string */
2393 encode_pixel_line_2bp( s, p_region, i_line );
2397 bs_write( s, 8, 0x11 ); /* 4 bit/pixel code string */
2398 encode_pixel_line_4bp( s, p_region, i_line );
2402 bs_write( s, 8, 0x12 ); /* 8 bit/pixel code string */
2403 encode_pixel_line_8bp( s, p_region, i_line );
2407 msg_Err( p_enc, "subpicture palette (%i) not handled",
2408 p_region->fmt.p_palette->i_entries );
2412 bs_write( s, 8, 0xf0 ); /* End of object line code */
2416 static void encode_pixel_line_2bp( bs_t *s, subpicture_region_t *p_region,
2419 unsigned int i, i_length = 0;
2420 int i_pitch = p_region->p_picture->p->i_pitch;
2421 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2422 int i_last_pixel = p_data[0];
2424 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2426 if( ( i != p_region->fmt.i_visible_width ) &&
2427 ( p_data[i] == i_last_pixel ) && ( i_length != 284 ) )
2433 if( ( i_length == 1 ) || ( i_length == 11 ) || ( i_length == 28 ) )
2435 /* 2bit/pixel code */
2437 bs_write( s, 2, i_last_pixel );
2440 bs_write( s, 2, 0 );
2441 bs_write( s, 1, 0 );
2442 bs_write( s, 1, 1 ); /* pseudo color 0 */
2451 bs_write( s, 2, i_last_pixel );
2452 bs_write( s, 2, i_last_pixel );
2456 bs_write( s, 2, 0 );
2457 bs_write( s, 1, 0 );
2458 bs_write( s, 1, 0 );
2459 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2462 else if( i_length > 2 )
2464 bs_write( s, 2, 0 );
2465 if( i_length <= 10 )
2467 bs_write( s, 1, 1 );
2468 bs_write( s, 3, i_length - 3 );
2469 bs_write( s, 2, i_last_pixel );
2473 bs_write( s, 1, 0 );
2474 bs_write( s, 1, 0 );
2476 if( i_length <= 27 )
2478 bs_write( s, 2, 2 );
2479 bs_write( s, 4, i_length - 12 );
2480 bs_write( s, 2, i_last_pixel );
2484 bs_write( s, 2, 3 );
2485 bs_write( s, 8, i_length - 29 );
2486 bs_write( s, 2, i_last_pixel );
2491 if( i == p_region->fmt.i_visible_width ) break;
2493 i_last_pixel = p_data[i];
2498 bs_write( s, 2, 0 );
2499 bs_write( s, 1, 0 );
2500 bs_write( s, 1, 0 );
2501 bs_write( s, 2, 0 );
2507 static void encode_pixel_line_4bp( bs_t *s, subpicture_region_t *p_region,
2510 unsigned int i, i_length = 0;
2511 int i_pitch = p_region->p_picture->p->i_pitch;
2512 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2513 int i_last_pixel = p_data[0];
2515 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2517 if( i != p_region->fmt.i_visible_width &&
2518 p_data[i] == i_last_pixel && i_length != 280 )
2524 if( ( i_length == 1 ) ||
2525 ( ( i_length == 3 ) && i_last_pixel ) ||
2528 /* 4bit/pixel code */
2530 bs_write( s, 4, i_last_pixel );
2533 bs_write( s, 4, 0 );
2534 bs_write( s, 1, 1 );
2535 bs_write( s, 1, 1 );
2536 bs_write( s, 2, 0 ); /* pseudo color 0 */
2545 bs_write( s, 4, i_last_pixel );
2546 bs_write( s, 4, i_last_pixel );
2550 bs_write( s, 4, 0 );
2551 bs_write( s, 1, 1 );
2552 bs_write( s, 1, 1 );
2553 bs_write( s, 2, 1 ); /* 2 * pseudo color 0 */
2556 else if( !i_last_pixel && ( i_length >= 3 ) && ( i_length <= 9 ) )
2558 bs_write( s, 4, 0 );
2559 bs_write( s, 1, 0 );
2560 bs_write( s, 3, i_length - 2 ); /* (i_length - 2) * color 0 */
2562 else if( i_length > 2 )
2564 bs_write( s, 4, 0 );
2565 bs_write( s, 1, 1 );
2569 bs_write( s, 1, 0 );
2570 bs_write( s, 2, i_length - 4 );
2571 bs_write( s, 4, i_last_pixel );
2575 bs_write( s, 1, 1 );
2577 if( i_length <= 24 )
2579 bs_write( s, 2, 2 );
2580 bs_write( s, 4, i_length - 9 );
2581 bs_write( s, 4, i_last_pixel );
2585 bs_write( s, 2, 3 );
2586 bs_write( s, 8, i_length - 25 );
2587 bs_write( s, 4, i_last_pixel );
2592 if( i == p_region->fmt.i_visible_width ) break;
2594 i_last_pixel = p_data[i];
2599 bs_write( s, 8, 0 );
2605 static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region,
2608 unsigned int i, i_length = 0;
2609 int i_pitch = p_region->p_picture->p->i_pitch;
2610 uint8_t *p_data = &p_region->p_picture->p->p_pixels[ i_pitch * i_line ];
2611 int i_last_pixel = p_data[0];
2613 for( i = 0; i <= p_region->fmt.i_visible_width; i++ )
2615 if( ( i != p_region->fmt.i_visible_width ) &&
2616 ( p_data[i] == i_last_pixel ) && ( i_length != 127 ) )
2622 if( ( i_length == 1 ) && i_last_pixel )
2624 /* 8bit/pixel code */
2625 bs_write( s, 8, i_last_pixel );
2627 else if( ( i_length == 2 ) && i_last_pixel )
2629 /* 8bit/pixel code */
2630 bs_write( s, 8, i_last_pixel );
2631 bs_write( s, 8, i_last_pixel );
2633 else if( i_length <= 127 )
2635 bs_write( s, 8, 0 );
2639 bs_write( s, 1, 0 );
2640 bs_write( s, 7, i_length ); /* pseudo color 0 */
2644 bs_write( s, 1, 1 );
2645 bs_write( s, 7, i_length );
2646 bs_write( s, 8, i_last_pixel );
2650 if( i == p_region->fmt.i_visible_width ) break;
2652 i_last_pixel = p_data[i];
2657 bs_write( s, 8, 0 );
2658 bs_write( s, 8, 0 );
2665 static void default_dds_init( decoder_t * p_dec )
2667 decoder_sys_t *p_sys = p_dec->p_sys;
2669 /* see notes on DDS at the top of the file */
2671 /* configure for SD res in case DDS is not present */
2672 p_sys->display.i_version = 0xff; /* an invalid version so it's always different */
2673 p_sys->display.i_width = 720;
2674 p_sys->display.i_height = 576;
2675 p_sys->display.b_windowed = false;