mirror of
https://code.videolan.org/videolan/vlc
synced 2024-10-07 03:56:28 +02:00
f77a6c4896
This is the issue exploited by the anime groups.
We now skip anything in { }
Note that ass/ssa cannot have a valid string with text { text } text.
359 lines
16 KiB
C
359 lines
16 KiB
C
/*****************************************************************************
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* subsass.c : ASS/SSA subtitles decoder
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*****************************************************************************
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* Copyright (C) 2000-2006 the VideoLAN team
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* $Id$
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*
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* Authors: Gildas Bazin <gbazin@videolan.org>
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* Samuel Hocevar <sam@zoy.org>
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* Derk-Jan Hartman <hartman at videolan dot org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "subsdec.h"
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void ParseSSAString( decoder_t *p_dec,
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char *psz_subtitle,
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subpicture_t *p_spu_in )
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{
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/* We expect MKV formatted SSA:
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* ReadOrder, Layer, Style, CharacterName, MarginL, MarginR,
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* MarginV, Effect, Text */
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decoder_sys_t *p_sys = p_dec->p_sys;
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subpicture_t *p_spu = p_spu_in;
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ssa_style_t *p_style = NULL;
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char *psz_new_subtitle = NULL;
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char *psz_buffer_sub = NULL;
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char *psz_style = NULL;
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char *psz_style_start = NULL;
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char *psz_style_end = NULL;
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int i_text = 0, i_comma = 0, i_strlen = 0, i;
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int i_margin_l = 0, i_margin_r = 0, i_margin_v = 0;
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psz_buffer_sub = psz_subtitle;
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p_spu->p_region->psz_html = NULL;
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i_comma = 0;
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while( i_comma < 8 && *psz_buffer_sub != '\0' )
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{
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if( *psz_buffer_sub == ',' )
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{
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i_comma++;
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if( i_comma == 2 )
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psz_style_start = &psz_buffer_sub[1];
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else if( i_comma == 3 )
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psz_style_end = &psz_buffer_sub[0];
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else if( i_comma == 4 )
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i_margin_l = (int)strtol( &psz_buffer_sub[1], NULL, 10 );
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else if( i_comma == 5 )
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i_margin_r = (int)strtol( &psz_buffer_sub[1], NULL, 10 );
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else if( i_comma == 6 )
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i_margin_v = (int)strtol( &psz_buffer_sub[1], NULL, 10 );
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}
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psz_buffer_sub++;
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}
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if( *psz_buffer_sub == '\0' && i_comma == 8 )
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{
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msg_Dbg( p_dec, "couldn't find all fields in this SSA line" );
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return;
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}
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psz_new_subtitle = malloc( strlen( psz_buffer_sub ) + 1);
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i_text = 0;
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while( psz_buffer_sub[0] != '\0' )
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{
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if( psz_buffer_sub[0] == '\\' && psz_buffer_sub[1] == 'n' )
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{
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psz_new_subtitle[i_text] = ' ';
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i_text++;
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psz_buffer_sub += 2;
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}
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else if( psz_buffer_sub[0] == '\\' && psz_buffer_sub[1] == 'N' )
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{
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psz_new_subtitle[i_text] = '\n';
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i_text++;
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psz_buffer_sub += 2;
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}
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else if( psz_buffer_sub[0] == '{' )
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{
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/* { } Control code in SSA. Cannot be escaped */
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while( psz_buffer_sub[0] != '\0' &&
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psz_buffer_sub[0] != '}' )
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{
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psz_buffer_sub++;
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}
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if( psz_buffer_sub[0] == '}' ) psz_buffer_sub++;
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}
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else
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{
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psz_new_subtitle[i_text] = psz_buffer_sub[0];
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i_text++;
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psz_buffer_sub++;
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}
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}
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psz_new_subtitle[i_text] = '\0';
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i_strlen = __MAX( psz_style_end - psz_style_start, 0);
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psz_style = strndup( psz_style_start, i_strlen );
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for( i = 0; i < p_sys->i_ssa_styles; i++ )
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{
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if( !strcmp( p_sys->pp_ssa_styles[i]->psz_stylename, psz_style ) )
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p_style = p_sys->pp_ssa_styles[i];
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}
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free( psz_style );
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p_spu->p_region->psz_text = psz_new_subtitle;
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if( p_style == NULL )
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{
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p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM | p_sys->i_align;
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p_spu->p_region->i_x = p_sys->i_align ? 20 : 0;
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p_spu->p_region->i_y = 10;
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}
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else
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{
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msg_Dbg( p_dec, "style is: %s", p_style->psz_stylename);
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p_spu->p_region->p_style = &p_style->font_style;
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p_spu->p_region->i_align = p_style->i_align;
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if( p_style->i_align & SUBPICTURE_ALIGN_LEFT )
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{
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p_spu->p_region->i_x = (i_margin_l) ? i_margin_l : p_style->i_margin_h;
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}
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else if( p_style->i_align & SUBPICTURE_ALIGN_RIGHT )
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{
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p_spu->p_region->i_x = (i_margin_r) ? i_margin_r : p_style->i_margin_h;
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}
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p_spu->p_region->i_y = (i_margin_v) ? i_margin_v : p_style->i_margin_v;
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}
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}
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/*****************************************************************************
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* ParseColor: SSA stores color in BBGGRR, in ASS it uses AABBGGRR
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* The string value in the string can be a pure integer, or hexadecimal &HBBGGRR
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*****************************************************************************/
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static void ParseColor( char *psz_color, int *pi_color, int *pi_alpha )
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{
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int i_color = 0;
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if( !strncasecmp( psz_color, "&H", 2 ) )
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{
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/* textual HEX representation */
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i_color = (int) strtol( psz_color+2, NULL, 16 );
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}
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else i_color = (int) strtol( psz_color, NULL, 0 );
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*pi_color = 0;
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*pi_color |= ( ( i_color & 0x000000FF ) << 16 ); /* Red */
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*pi_color |= ( ( i_color & 0x0000FF00 ) ); /* Green */
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*pi_color |= ( ( i_color & 0x00FF0000 ) >> 16 ); /* Blue */
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if( pi_alpha != NULL )
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*pi_alpha = ( i_color & 0xFF000000 ) >> 24;
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}
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/*****************************************************************************
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* ParseSSAHeader: Retrieve global formatting information etc
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*****************************************************************************/
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void ParseSSAHeader( decoder_t *p_dec )
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{
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decoder_sys_t *p_sys = p_dec->p_sys;
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char *psz_parser = NULL;
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char *psz_header = malloc( p_dec->fmt_in.i_extra+1 );
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int i_section_type = 1;
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memcpy( psz_header, p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
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psz_header[ p_dec->fmt_in.i_extra] = '\0';
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/* Handle [Script Info] section */
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psz_parser = strcasestr( psz_header, "[Script Info]" );
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if( psz_parser == NULL ) goto eof;
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psz_parser = GotoNextLine( psz_parser );
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while( psz_parser[0] != '\0' )
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{
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int temp;
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char buffer_text[MAX_LINE + 1];
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if( psz_parser[0] == '!' || psz_parser[0] == ';' ) /* comment */;
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else if( sscanf( psz_parser, "PlayResX: %d", &temp ) == 1 )
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p_sys->i_original_width = ( temp > 0 ) ? temp : -1;
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else if( sscanf( psz_parser, "PlayResY: %d", &temp ) == 1 )
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p_sys->i_original_height = ( temp > 0 ) ? temp : -1;
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else if( sscanf( psz_parser, "Script Type: %8192s", buffer_text ) == 1 )
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{
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if( !strcasecmp( buffer_text, "V4.00+" ) ) p_sys->b_ass = true;
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}
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else if( !strncasecmp( psz_parser, "[V4 Styles]", 11 ) )
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i_section_type = 1;
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else if( !strncasecmp( psz_parser, "[V4+ Styles]", 12) )
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{
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i_section_type = 2;
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p_sys->b_ass = true;
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}
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else if( !strncasecmp( psz_parser, "[Events]", 8 ) )
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i_section_type = 4;
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else if( !strncasecmp( psz_parser, "Style:", 6 ) )
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{
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int i_font_size, i_bold, i_italic, i_border, i_outline, i_shadow,
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i_underline, i_strikeout, i_scale_x, i_scale_y, i_spacing,
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i_align, i_margin_l, i_margin_r, i_margin_v;
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char psz_temp_stylename[MAX_LINE+1];
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char psz_temp_fontname[MAX_LINE+1];
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char psz_temp_color1[MAX_LINE+1];
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char psz_temp_color2[MAX_LINE+1];
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char psz_temp_color3[MAX_LINE+1];
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char psz_temp_color4[MAX_LINE+1];
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if( i_section_type == 1 ) /* V4 */
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{
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if( sscanf( psz_parser, "Style: %8192[^,],%8192[^,],%d,%8192[^,],%8192[^,],%8192[^,],%8192[^,],%d,%d,%d,%d,%d,%d,%d,%d,%d%*[^\r\n]",
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psz_temp_stylename, psz_temp_fontname, &i_font_size,
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psz_temp_color1, psz_temp_color2, psz_temp_color3,
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psz_temp_color4, &i_bold, &i_italic,
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&i_border, &i_outline, &i_shadow, &i_align, &i_margin_l,
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&i_margin_r, &i_margin_v ) == 16 )
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{
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ssa_style_t *p_style = malloc( sizeof(ssa_style_t) );
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p_style->psz_stylename = strdup( psz_temp_stylename );
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p_style->font_style.psz_fontname = strdup( psz_temp_fontname );
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p_style->font_style.i_font_size = i_font_size;
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ParseColor( psz_temp_color1, &p_style->font_style.i_font_color, NULL );
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ParseColor( psz_temp_color4, &p_style->font_style.i_shadow_color, NULL );
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p_style->font_style.i_outline_color = p_style->font_style.i_shadow_color;
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p_style->font_style.i_font_alpha = p_style->font_style.i_outline_alpha
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= p_style->font_style.i_shadow_alpha = 0x00;
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p_style->font_style.i_style_flags = 0;
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if( i_bold ) p_style->font_style.i_style_flags |= STYLE_BOLD;
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if( i_italic ) p_style->font_style.i_style_flags |= STYLE_ITALIC;
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if( i_border == 1 )
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p_style->font_style.i_style_flags |= (STYLE_ITALIC | STYLE_OUTLINE);
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else if( i_border == 3 )
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{
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p_style->font_style.i_style_flags |= STYLE_BACKGROUND;
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p_style->font_style.i_background_color = p_style->font_style.i_shadow_color;
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p_style->font_style.i_background_alpha = p_style->font_style.i_shadow_alpha;
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}
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p_style->font_style.i_shadow_width = i_shadow;
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p_style->font_style.i_outline_width = i_outline;
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p_style->i_align = 0;
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if( i_align == 1 || i_align == 5 || i_align == 9 )
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p_style->i_align |= SUBPICTURE_ALIGN_LEFT;
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if( i_align == 3 || i_align == 7 || i_align == 11 )
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p_style->i_align |= SUBPICTURE_ALIGN_RIGHT;
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if( i_align < 4 )
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p_style->i_align |= SUBPICTURE_ALIGN_BOTTOM;
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else if( i_align < 8 )
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p_style->i_align |= SUBPICTURE_ALIGN_TOP;
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p_style->i_margin_h = ( p_style->i_align & SUBPICTURE_ALIGN_RIGHT ) ?
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i_margin_r : i_margin_l;
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p_style->i_margin_v = i_margin_v;
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p_style->i_margin_percent_h = 0;
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p_style->i_margin_percent_v = 0;
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p_style->font_style.i_karaoke_background_color = 0xffffff;
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p_style->font_style.i_karaoke_background_alpha = 0xff;
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TAB_APPEND( p_sys->i_ssa_styles, p_sys->pp_ssa_styles, p_style );
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}
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else msg_Warn( p_dec, "SSA v4 styleline parsing failed" );
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}
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else if( i_section_type == 2 ) /* V4+ */
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{
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/* Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour,
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Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline,
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Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
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*/
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if( sscanf( psz_parser, "Style: %8192[^,],%8192[^,],%d,%8192[^,],%8192[^,],%8192[^,],%8192[^,],%d,%d,%d,%d,%d,%d,%d,%*f,%d,%d,%d,%d,%d,%d,%d%*[^\r\n]",
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psz_temp_stylename, psz_temp_fontname, &i_font_size,
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psz_temp_color1, psz_temp_color2, psz_temp_color3, psz_temp_color4, &i_bold, &i_italic,
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&i_underline, &i_strikeout, &i_scale_x, &i_scale_y, &i_spacing, &i_border, &i_outline,
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&i_shadow, &i_align, &i_margin_l, &i_margin_r, &i_margin_v ) == 21 )
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{
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ssa_style_t *p_style = malloc( sizeof(ssa_style_t) );
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p_style->psz_stylename = strdup( psz_temp_stylename );
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p_style->font_style.psz_fontname = strdup( psz_temp_fontname );
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p_style->font_style.i_font_size = i_font_size;
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ParseColor( psz_temp_color1, &p_style->font_style.i_font_color,
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&p_style->font_style.i_font_alpha );
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ParseColor( psz_temp_color3, &p_style->font_style.i_outline_color,
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&p_style->font_style.i_outline_alpha );
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ParseColor( psz_temp_color4, &p_style->font_style.i_shadow_color,
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&p_style->font_style.i_shadow_alpha );
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p_style->font_style.i_style_flags = 0;
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if( i_bold ) p_style->font_style.i_style_flags |= STYLE_BOLD;
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if( i_italic ) p_style->font_style.i_style_flags |= STYLE_ITALIC;
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if( i_underline ) p_style->font_style.i_style_flags |= STYLE_UNDERLINE;
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if( i_strikeout ) p_style->font_style.i_style_flags |= STYLE_STRIKEOUT;
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if( i_border == 1 ) p_style->font_style.i_style_flags |= (STYLE_ITALIC | STYLE_OUTLINE);
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else if( i_border == 3 )
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{
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p_style->font_style.i_style_flags |= STYLE_BACKGROUND;
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p_style->font_style.i_background_color = p_style->font_style.i_shadow_color;
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p_style->font_style.i_background_alpha = p_style->font_style.i_shadow_alpha;
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}
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p_style->font_style.i_shadow_width = ( i_border == 1 ) ? i_shadow : 0;
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p_style->font_style.i_outline_width = ( i_border == 1 ) ? i_outline : 0;
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p_style->font_style.i_spacing = i_spacing;
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//p_style->font_style.f_angle = f_angle;
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p_style->i_align = 0;
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if( i_align == 0x1 || i_align == 0x4 || i_align == 0x7 )
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p_style->i_align |= SUBPICTURE_ALIGN_LEFT;
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if( i_align == 0x3 || i_align == 0x6 || i_align == 0x9 )
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p_style->i_align |= SUBPICTURE_ALIGN_RIGHT;
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if( i_align == 0x7 || i_align == 0x8 || i_align == 0x9 )
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p_style->i_align |= SUBPICTURE_ALIGN_TOP;
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if( i_align == 0x1 || i_align == 0x2 || i_align == 0x3 )
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p_style->i_align |= SUBPICTURE_ALIGN_BOTTOM;
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p_style->i_margin_h = ( p_style->i_align & SUBPICTURE_ALIGN_RIGHT ) ?
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i_margin_r : i_margin_l;
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p_style->i_margin_v = i_margin_v;
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p_style->i_margin_percent_h = 0;
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p_style->i_margin_percent_v = 0;
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p_style->font_style.i_karaoke_background_color = 0xffffff;
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p_style->font_style.i_karaoke_background_alpha = 0xff;
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/*TODO: Ignored: angle i_scale_x|y (fontscaling), i_encoding */
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TAB_APPEND( p_sys->i_ssa_styles, p_sys->pp_ssa_styles, p_style );
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}
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else msg_Dbg( p_dec, "SSA V4+ styleline parsing failed" );
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}
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}
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psz_parser = GotoNextLine( psz_parser );
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}
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eof:
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free( psz_header );
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return;
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}
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