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vlc/modules/codec/subtitles/subsdec.c
Rémi Denis-Courmont 0549228196 Remove most stray semi-colons in module descriptions 
Those multi-lines are still to be done (it's going to be fun...)
See also 5af4cc854b.
2008-10-29 22:14:26 +02:00

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/*****************************************************************************
* subsdec.c : text subtitles decoder
*****************************************************************************
* Copyright (C) 2000-2006 the VideoLAN team
* $Id$
*
* Authors: Gildas Bazin <gbazin@videolan.org>
* Samuel Hocevar <sam@zoy.org>
* Derk-Jan Hartman <hartman at videolan dot org>
* Bernie Purcell <bitmap@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "subsdec.h"
#include <vlc_plugin.h>
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int OpenDecoder ( vlc_object_t * );
static void CloseDecoder ( vlc_object_t * );
static subpicture_t *DecodeBlock ( decoder_t *, block_t ** );
static subpicture_t *ParseText ( decoder_t *, block_t * );
static char *StripTags ( char * );
static char *CreateHtmlSubtitle( int *pi_align, char * );
/*****************************************************************************
* Module descriptor.
*****************************************************************************/
static const char *const ppsz_encodings[] = {
DEFAULT_NAME, "ASCII", "UTF-8", "",
"ISO-8859-1", "CP1252", "MacRoman", "MacIceland","ISO-8859-15", "",
"ISO-8859-2", "CP1250", "MacCentralEurope", "MacCroatian", "MacRomania", "",
"ISO-8859-5", "CP1251", "MacCyrillic", "MacUkraine", "KOI8-R", "KOI8-U", "KOI8-RU", "",
"ISO-8859-6", "CP1256", "MacArabic", "",
"ISO-8859-7", "CP1253", "MacGreek", "",
"ISO-8859-8", "CP1255", "MacHebrew", "",
"ISO-8859-9", "CP1254", "MacTurkish", "",
"ISO-8859-13", "CP1257", "",
"ISO-2022-JP", "ISO-2022-JP-1", "ISO-2022-JP-2", "EUC-JP", "SHIFT_JIS", "",
"ISO-2022-CN", "ISO-2022-CN-EXT", "EUC-CN", "EUC-TW", "BIG5", "BIG5-HKSCS", "",
"ISO-2022-KR", "EUC-KR", "",
"MacThai", "KOI8-T", "",
"ISO-8859-3", "ISO-8859-4", "ISO-8859-10", "ISO-8859-14", "ISO-8859-16", "",
"CP850", "CP862", "CP866", "CP874", "CP932", "CP949", "CP950", "CP1133", "CP1258", "",
"Macintosh", "",
"UTF-7", "UTF-16", "UTF-16BE", "UTF-16LE", "UTF-32", "UTF-32BE", "UTF-32LE",
"C99", "JAVA", "UCS-2", "UCS-2BE", "UCS-2LE", "UCS-4", "UCS-4BE", "UCS-4LE", "",
"HZ", "GBK", "GB18030", "JOHAB", "ARMSCII-8",
"Georgian-Academy", "Georgian-PS", "TIS-620", "MuleLao-1", "VISCII", "TCVN",
"HPROMAN8", "NEXTSTEP" };
/*
SSA supports charset selection.
The following known charsets are used:
0 = Ansi - Western European
1 = default
2 = symbol
3 = invalid
77 = Mac
128 = Japanese (Shift JIS)
129 = Hangul
130 = Johab
134 = GB2312 Simplified Chinese
136 = Big5 Traditional Chinese
161 = Greek
162 = Turkish
163 = Vietnamese
177 = Hebrew
178 = Arabic
186 = Baltic
204 = Russian (Cyrillic)
222 = Thai
238 = Eastern European
254 = PC 437
*/
static const int pi_justification[] = { 0, 1, 2 };
static const char *const ppsz_justification_text[] = {
N_("Center"),N_("Left"),N_("Right")};
#define ENCODING_TEXT N_("Subtitles text encoding")
#define ENCODING_LONGTEXT N_("Set the encoding used in text subtitles")
#define ALIGN_TEXT N_("Subtitles justification")
#define ALIGN_LONGTEXT N_("Set the justification of subtitles")
#define AUTODETECT_UTF8_TEXT N_("UTF-8 subtitles autodetection")
#define AUTODETECT_UTF8_LONGTEXT N_("This enables automatic detection of " \
"UTF-8 encoding within subtitles files.")
#define FORMAT_TEXT N_("Formatted Subtitles")
#define FORMAT_LONGTEXT N_("Some subtitle formats allow for text formatting. " \
"VLC partly implements this, but you can choose to disable all formatting.")
vlc_module_begin ()
set_shortname( N_("Subtitles"))
set_description( N_("Text subtitles decoder") )
set_capability( "decoder", 50 )
set_callbacks( OpenDecoder, CloseDecoder )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_SCODEC )
add_integer( "subsdec-align", 0, NULL, ALIGN_TEXT, ALIGN_LONGTEXT,
false );
change_integer_list( pi_justification, ppsz_justification_text, NULL );
add_string( "subsdec-encoding", DEFAULT_NAME, NULL,
ENCODING_TEXT, ENCODING_LONGTEXT, false );
change_string_list( ppsz_encodings, 0, 0 );
add_bool( "subsdec-autodetect-utf8", true, NULL,
AUTODETECT_UTF8_TEXT, AUTODETECT_UTF8_LONGTEXT, false );
add_bool( "subsdec-formatted", true, NULL, FORMAT_TEXT, FORMAT_LONGTEXT,
false );
vlc_module_end ()
/*****************************************************************************
* OpenDecoder: probe the decoder and return score
*****************************************************************************
* Tries to launch a decoder and return score so that the interface is able
* to chose.
*****************************************************************************/
static int OpenDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
vlc_value_t val;
switch( p_dec->fmt_in.i_codec )
{
case VLC_FOURCC('s','u','b','t'):
case VLC_FOURCC('s','s','a',' '):
case VLC_FOURCC('t','1','4','0'):
break;
default:
return VLC_EGENERIC;
}
p_dec->pf_decode_sub = DecodeBlock;
/* Allocate the memory needed to store the decoder's structure */
p_dec->p_sys = p_sys = malloc( sizeof( *p_sys ) );
if( p_sys == NULL )
return VLC_ENOMEM;
/* init of p_sys */
memset( p_sys, 0, sizeof( *p_sys ) );
p_sys->i_align = 0;
p_sys->iconv_handle = (vlc_iconv_t)-1;
p_sys->b_autodetect_utf8 = false;
p_sys->b_ass = false;
p_sys->i_original_height = -1;
p_sys->i_original_width = -1;
TAB_INIT( p_sys->i_ssa_styles, p_sys->pp_ssa_styles );
TAB_INIT( p_sys->i_images, p_sys->pp_images );
char *psz_charset = NULL;
/* First try demux-specified encoding */
if( p_dec->fmt_in.i_codec == VLC_FOURCC('t','1','4','0') )
psz_charset = strdup( "UTF-8" ); /* IUT T.140 is always using UTF-8 */
else
if( p_dec->fmt_in.subs.psz_encoding && *p_dec->fmt_in.subs.psz_encoding )
{
psz_charset = strdup (p_dec->fmt_in.subs.psz_encoding);
msg_Dbg (p_dec, "trying demuxer-specified character encoding: %s",
p_dec->fmt_in.subs.psz_encoding ?: "not specified");
}
/* Second, try configured encoding */
if (psz_charset == NULL)
{
psz_charset = var_CreateGetNonEmptyString (p_dec, "subsdec-encoding");
if ((psz_charset != NULL) && !strcasecmp (psz_charset, DEFAULT_NAME))
{
free (psz_charset);
psz_charset = NULL;
}
msg_Dbg (p_dec, "trying configured character encoding: %s",
psz_charset ?: "not specified");
}
/* Third, try "local" encoding with optional UTF-8 autodetection */
if (psz_charset == NULL)
{
psz_charset = strdup (GetFallbackEncoding ());
msg_Dbg (p_dec, "trying default character encoding: %s",
psz_charset ?: "not specified");
if (var_CreateGetBool (p_dec, "subsdec-autodetect-utf8"))
{
msg_Dbg (p_dec, "using automatic UTF-8 detection");
p_sys->b_autodetect_utf8 = true;
}
}
/* Forth, don't do character decoding, i.e. assume UTF-8 */
if (psz_charset == NULL)
{
psz_charset = strdup ("UTF-8");
msg_Dbg (p_dec, "using UTF-8 character encoding" );
}
if ((psz_charset != NULL)
&& strcasecmp (psz_charset, "UTF-8")
&& strcasecmp (psz_charset, "utf8"))
{
p_sys->iconv_handle = vlc_iconv_open ("UTF-8", psz_charset);
if (p_sys->iconv_handle == (vlc_iconv_t)(-1))
msg_Err (p_dec, "cannot convert from %s: %m", psz_charset);
}
free (psz_charset);
var_Create( p_dec, "subsdec-align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Get( p_dec, "subsdec-align", &val );
p_sys->i_align = val.i_int;
if( p_dec->fmt_in.i_codec == VLC_FOURCC('s','s','a',' ')
&& var_CreateGetBool( p_dec, "subsdec-formatted" ) )
{
if( p_dec->fmt_in.i_extra > 0 )
ParseSSAHeader( p_dec );
}
return VLC_SUCCESS;
}
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************
* This function must be fed with complete subtitles units.
****************************************************************************/
static subpicture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
subpicture_t *p_spu;
block_t *p_block;
if( !pp_block || *pp_block == NULL )
return NULL;
p_block = *pp_block;
if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
block_Release( p_block );
return NULL;
}
p_spu = ParseText( p_dec, p_block );
block_Release( p_block );
*pp_block = NULL;
return p_spu;
}
/*****************************************************************************
* CloseDecoder: clean up the decoder
*****************************************************************************/
static void CloseDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
if( p_sys->iconv_handle != (vlc_iconv_t)-1 )
vlc_iconv_close( p_sys->iconv_handle );
if( p_sys->pp_ssa_styles )
{
int i;
for( i = 0; i < p_sys->i_ssa_styles; i++ )
{
if( !p_sys->pp_ssa_styles[i] )
continue;
free( p_sys->pp_ssa_styles[i]->psz_stylename );
free( p_sys->pp_ssa_styles[i]->font_style.psz_fontname );
free( p_sys->pp_ssa_styles[i] );
}
TAB_CLEAN( p_sys->i_ssa_styles, p_sys->pp_ssa_styles );
}
if( p_sys->pp_images )
{
int i;
for( i = 0; i < p_sys->i_images; i++ )
{
if( !p_sys->pp_images[i] )
continue;
if( p_sys->pp_images[i]->p_pic )
picture_Release( p_sys->pp_images[i]->p_pic );
free( p_sys->pp_images[i]->psz_filename );
free( p_sys->pp_images[i] );
}
TAB_CLEAN( p_sys->i_images, p_sys->pp_images );
}
free( p_sys );
}
/*****************************************************************************
* ParseText: parse an text subtitle packet and send it to the video output
*****************************************************************************/
static subpicture_t *ParseText( decoder_t *p_dec, block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
subpicture_t *p_spu = NULL;
char *psz_subtitle = NULL;
video_format_t fmt;
/* We cannot display a subpicture with no date */
if( p_block->i_pts == 0 )
{
msg_Warn( p_dec, "subtitle without a date" );
return NULL;
}
/* Check validity of packet data */
/* An "empty" line containing only \0 can be used to force
and ephemer picture from the screen */
if( p_block->i_buffer < 1 )
{
msg_Warn( p_dec, "no subtitle data" );
return NULL;
}
/* Should be resiliant against bad subtitles */
psz_subtitle = strndup( (const char *)p_block->p_buffer,
p_block->i_buffer );
if( psz_subtitle == NULL )
return NULL;
if( p_sys->iconv_handle == (vlc_iconv_t)-1 )
{
if (EnsureUTF8( psz_subtitle ) == NULL)
{
msg_Err( p_dec, "failed to convert subtitle encoding.\n"
"Try manually setting a character-encoding "
"before you open the file." );
}
}
else
{
if( p_sys->b_autodetect_utf8 )
{
if( IsUTF8( psz_subtitle ) == NULL )
{
msg_Dbg( p_dec, "invalid UTF-8 sequence: "
"disabling UTF-8 subtitles autodetection" );
p_sys->b_autodetect_utf8 = false;
}
}
if( !p_sys->b_autodetect_utf8 )
{
size_t inbytes_left = strlen( psz_subtitle );
size_t outbytes_left = 6 * inbytes_left;
char *psz_new_subtitle = malloc( outbytes_left + 1 );
char *psz_convert_buffer_out = psz_new_subtitle;
const char *psz_convert_buffer_in = psz_subtitle;
size_t ret = vlc_iconv( p_sys->iconv_handle,
&psz_convert_buffer_in, &inbytes_left,
&psz_convert_buffer_out, &outbytes_left );
*psz_convert_buffer_out++ = '\0';
free( psz_subtitle );
if( ( ret == (size_t)(-1) ) || inbytes_left )
{
free( psz_new_subtitle );
msg_Err( p_dec, "failed to convert subtitle encoding.\n"
"Try manually setting a character-encoding "
"before you open the file." );
return NULL;
}
psz_subtitle = realloc( psz_new_subtitle,
psz_convert_buffer_out - psz_new_subtitle );
}
}
/* Create the subpicture unit */
p_spu = decoder_NewSubpicture( p_dec );
if( !p_spu )
{
msg_Warn( p_dec, "can't get spu buffer" );
free( psz_subtitle );
return NULL;
}
/* Create a new subpicture region */
memset( &fmt, 0, sizeof(video_format_t) );
fmt.i_chroma = VLC_FOURCC('T','E','X','T');
fmt.i_aspect = 0;
fmt.i_width = fmt.i_height = 0;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_spu->p_region = subpicture_region_New( &fmt );
if( !p_spu->p_region )
{
msg_Err( p_dec, "cannot allocate SPU region" );
free( psz_subtitle );
decoder_DeleteSubpicture( p_dec, p_spu );
return NULL;
}
/* Decode and format the subpicture unit */
if( p_dec->fmt_in.i_codec != VLC_FOURCC('s','s','a',' ') )
{
/* Normal text subs, easy markup */
p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM | p_sys->i_align;
p_spu->p_region->i_x = p_sys->i_align ? 20 : 0;
p_spu->p_region->i_y = 10;
/* Remove formatting from string */
p_spu->p_region->psz_text = StripTags( psz_subtitle );
if( var_CreateGetBool( p_dec, "subsdec-formatted" ) )
{
p_spu->p_region->psz_html = CreateHtmlSubtitle( &p_spu->p_region->i_align, psz_subtitle );
}
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = p_block->i_pts + p_block->i_length;
p_spu->b_ephemer = (p_block->i_length == 0);
p_spu->b_absolute = false;
}
else
{
/* Decode SSA/USF strings */
ParseSSAString( p_dec, psz_subtitle, p_spu );
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = p_block->i_pts + p_block->i_length;
p_spu->b_ephemer = (p_block->i_length == 0);
p_spu->b_absolute = false;
p_spu->i_original_picture_width = p_sys->i_original_width;
p_spu->i_original_picture_height = p_sys->i_original_height;
}
free( psz_subtitle );
return p_spu;
}
char* GotoNextLine( char *psz_text )
{
char *p_newline = psz_text;
while( p_newline[0] != '\0' )
{
if( p_newline[0] == '\n' || p_newline[0] == '\r' )
{
p_newline++;
while( p_newline[0] == '\n' || p_newline[0] == '\r' )
p_newline++;
break;
}
else p_newline++;
}
return p_newline;
}
/* Function now handles tags with attribute values, and tries
* to deal with &' commands too. It no longer modifies the string
* in place, so that the original text can be reused
*/
static char *StripTags( char *psz_subtitle )
{
char *psz_text_start;
char *psz_text;
psz_text = psz_text_start = malloc( strlen( psz_subtitle ) + 1 );
if( !psz_text_start )
return NULL;
while( *psz_subtitle )
{
if( *psz_subtitle == '<' )
{
if( strncasecmp( psz_subtitle, "<br/>", 5 ) == 0 )
*psz_text++ = '\n';
psz_subtitle += strcspn( psz_subtitle, ">" );
}
else if( *psz_subtitle == '&' )
{
if( !strncasecmp( psz_subtitle, "&lt;", 4 ))
{
*psz_text++ = '<';
psz_subtitle += strcspn( psz_subtitle, ";" );
}
else if( !strncasecmp( psz_subtitle, "&gt;", 4 ))
{
*psz_text++ = '>';
psz_subtitle += strcspn( psz_subtitle, ";" );
}
else if( !strncasecmp( psz_subtitle, "&amp;", 5 ))
{
*psz_text++ = '&';
psz_subtitle += strcspn( psz_subtitle, ";" );
}
else if( !strncasecmp( psz_subtitle, "&quot;", 6 ))
{
*psz_text++ = '\"';
psz_subtitle += strcspn( psz_subtitle, ";" );
}
else
{
/* Assume it is just a normal ampersand */
*psz_text++ = '&';
}
}
else
{
*psz_text++ = *psz_subtitle;
}
psz_subtitle++;
}
*psz_text = '\0';
psz_text_start = realloc( psz_text_start, strlen( psz_text_start ) + 1 );
return psz_text_start;
}
/* Try to respect any style tags present in the subtitle string. The main
* problem here is a lack of adequate specs for the subtitle formats.
* SSA/ASS and USF are both detail spec'ed -- but they are handled elsewhere.
* SAMI has a detailed spec, but extensive rework is needed in the demux
* code to prevent all this style information being excised, as it presently
* does.
* That leaves the others - none of which were (I guess) originally intended
* to be carrying style information. Over time people have used them that way.
* In the absence of specifications from which to work, the tags supported
* have been restricted to the simple set permitted by the USF DTD, ie. :
* Basic: <br>, <i>, <b>, <u>
* Extended: <font>
* Attributes: face
* family
* size
* color
* outline-color
* shadow-color
* outline-level
* shadow-level
* back-color
* alpha
* There is also the further restriction that the subtitle be well-formed
* as an XML entity, ie. the HTML sentence:
* <b><i>Bold and Italics</b></i>
* doesn't qualify because the tags aren't nested one inside the other.
* <text> tags are automatically added to the output to ensure
* well-formedness.
* If the text doesn't qualify for any reason, a NULL string is
* returned, and the rendering engine will fall back to the
* plain text version of the subtitle.
*/
static void HtmlNPut( char **ppsz_html, const char *psz_text, int i_max )
{
const int i_len = strlen(psz_text);
strncpy( *ppsz_html, psz_text, i_max );
*ppsz_html += __MIN(i_max,i_len);
}
static void HtmlPut( char **ppsz_html, const char *psz_text )
{
strcpy( *ppsz_html, psz_text );
*ppsz_html += strlen(psz_text);
}
static void HtmlCopy( char **ppsz_html, char **ppsz_subtitle, const char *psz_text )
{
HtmlPut( ppsz_html, psz_text );
*ppsz_subtitle += strlen(psz_text);
}
static char *CreateHtmlSubtitle( int *pi_align, char *psz_subtitle )
{
char *psz_tag = malloc( ( strlen( psz_subtitle ) / 3 ) + 1 );
if( !psz_tag ) return NULL;
size_t i_buf_size = strlen( psz_subtitle ) + 100;
char *psz_html_start = malloc( i_buf_size );
bool b_has_align = false;
psz_tag[ 0 ] = '\0';
if( psz_html_start == NULL )
{
free( psz_tag );
return NULL;
}
char *psz_html = psz_html_start;
strcpy( psz_html, "<text>" );
psz_html += 6;
/* */
while( *psz_subtitle )
{
if( *psz_subtitle == '\n' )
{
HtmlPut( &psz_html, "<br/>" );
psz_subtitle++;
}
else if( *psz_subtitle == '<' )
{
if( !strncasecmp( psz_subtitle, "<br/>", 5 ))
{
HtmlCopy( &psz_html, &psz_subtitle, "<br/>" );
}
else if( !strncasecmp( psz_subtitle, "<b>", 3 ) )
{
HtmlCopy( &psz_html, &psz_subtitle, "<b>" );
strcat( psz_tag, "b" );
}
else if( !strncasecmp( psz_subtitle, "<i>", 3 ) )
{
HtmlCopy( &psz_html, &psz_subtitle, "<i>" );
strcat( psz_tag, "i" );
}
else if( !strncasecmp( psz_subtitle, "<u>", 3 ) )
{
HtmlCopy( &psz_html, &psz_subtitle, "<u>" );
strcat( psz_tag, "u" );
}
else if( !strncasecmp( psz_subtitle, "<font ", 6 ))
{
const char *psz_attribs[] = { "face=", "family=", "size=",
"color=", "outline-color=", "shadow-color=",
"outline-level=", "shadow-level=", "back-color=",
"alpha=", NULL };
HtmlCopy( &psz_html, &psz_subtitle, "<font " );
strcat( psz_tag, "f" );
while( *psz_subtitle != '>' )
{
int k;
for( k=0; psz_attribs[ k ]; k++ )
{
int i_len = strlen( psz_attribs[ k ] );
if( !strncasecmp( psz_subtitle, psz_attribs[k], i_len ) )
{
/* */
HtmlPut( &psz_html, psz_attribs[k] );
psz_subtitle += i_len;
/* */
if( *psz_subtitle == '"' )
{
psz_subtitle++;
i_len = strcspn( psz_subtitle, "\"" );
}
else
{
i_len = strcspn( psz_subtitle, " \t>" );
}
HtmlPut( &psz_html, "\"" );
if( !strcmp( psz_attribs[ k ], "color=" ) && *psz_subtitle >= '0' && *psz_subtitle <= '9' )
HtmlPut( &psz_html, "#" );
HtmlNPut( &psz_html, psz_subtitle, i_len );
HtmlPut( &psz_html, "\"" );
psz_subtitle += i_len;
if( *psz_subtitle == '\"' )
psz_subtitle++;
break;
}
}
if( psz_attribs[ k ] == NULL )
{
/* Jump over unrecognised tag */
int i_len = strcspn( psz_subtitle, "\"" ) + 1;
i_len += strcspn( psz_subtitle + i_len, "\"" ) + 1;
psz_subtitle += i_len;
}
while (*psz_subtitle == ' ')
*psz_html++ = *psz_subtitle++;
}
*psz_html++ = *psz_subtitle++;
}
else if( !strncmp( psz_subtitle, "</", 2 ))
{
bool b_match = false;
bool b_ignore = false;
int i_len = strlen( psz_tag ) - 1;
char *psz_lastTag = NULL;
if( i_len >= 0 )
{
psz_lastTag = psz_tag + i_len;
i_len = 0;
switch( *psz_lastTag )
{
case 'b':
b_match = !strncasecmp( psz_subtitle, "</b>", 4 );
i_len = 4;
break;
case 'i':
b_match = !strncasecmp( psz_subtitle, "</i>", 4 );
i_len = 4;
break;
case 'u':
b_match = !strncasecmp( psz_subtitle, "</u>", 4 );
i_len = 4;
break;
case 'f':
b_match = !strncasecmp( psz_subtitle, "</font>", 7 );
i_len = 7;
break;
case 'I':
i_len = strcspn( psz_subtitle, ">" );
b_match = psz_subtitle[i_len] == '>';
b_ignore = true;
if( b_match )
i_len++;
break;
}
}
if( !b_match )
{
/* Not well formed -- kill everything */
free( psz_html_start );
psz_html_start = NULL;
break;
}
*psz_lastTag = '\0';
if( !b_ignore )
HtmlNPut( &psz_html, psz_subtitle, i_len );
psz_subtitle += i_len;
}
else if( ( psz_subtitle[1] < 'a' || psz_subtitle[1] > 'z' ) &&
( psz_subtitle[1] < 'A' || psz_subtitle[1] > 'Z' ) )
{
/* We have a single < */
HtmlPut( &psz_html, "&lt;" );
psz_subtitle++;
}
else
{
/* We have an unknown tag or a single < */
/* Search for the next tag or end of tag or end of string */
char *psz_stop = psz_subtitle + 1 + strcspn( &psz_subtitle[1], "<>" );
char *psz_closing = strstr( psz_subtitle, "/>" );
if( psz_closing && psz_closing < psz_stop )
{
/* We have a self closed tag, remove it */
psz_subtitle = &psz_closing[2];
}
else if( *psz_stop == '>' )
{
char psz_match[256];
snprintf( psz_match, sizeof(psz_match), "</%s", &psz_subtitle[1] );
psz_match[strcspn( psz_match, " \t>" )] = '\0';
if( strstr( psz_subtitle, psz_match ) )
{
/* We have the closing tag, ignore it TODO */
psz_subtitle = &psz_stop[1];
strcat( psz_tag, "I" );
}
else
{
int i_len = psz_stop + 1 - psz_subtitle;
/* Copy the whole data */
for( ; i_len > 0; i_len--, psz_subtitle++ )
{
if( *psz_subtitle == '<' )
HtmlPut( &psz_html, "&lt;" );
else if( *psz_subtitle == '>' )
HtmlPut( &psz_html, "&gt;" );
else
*psz_html++ = *psz_subtitle;
}
}
}
else
{
/* We have a single < */
HtmlPut( &psz_html, "&lt;" );
psz_subtitle++;
}
}
}
else if( *psz_subtitle == '&' )
{
if( !strncasecmp( psz_subtitle, "&lt;", 4 ))
{
HtmlCopy( &psz_html, &psz_subtitle, "&lt;" );
}
else if( !strncasecmp( psz_subtitle, "&gt;", 4 ))
{
HtmlCopy( &psz_html, &psz_subtitle, "&gt;" );
}
else if( !strncasecmp( psz_subtitle, "&amp;", 5 ))
{
HtmlCopy( &psz_html, &psz_subtitle, "&amp;" );
}
else
{
HtmlPut( &psz_html, "&amp;" );
psz_subtitle++;
}
}
else if( *psz_subtitle == '>' )
{
HtmlPut( &psz_html, "&gt;" );
psz_subtitle++;
}
else if( psz_subtitle[0] == '{' && psz_subtitle[1] == '\\' &&
strchr( psz_subtitle, '}' ) )
{
/* Check for forced alignment */
if( !b_has_align &&
!strncmp( psz_subtitle, "{\\an", 4 ) && psz_subtitle[4] >= '1' && psz_subtitle[4] <= '9' && psz_subtitle[5] == '}' )
{
static const int pi_vertical[3] = { SUBPICTURE_ALIGN_BOTTOM, 0, SUBPICTURE_ALIGN_TOP };
static const int pi_horizontal[3] = { SUBPICTURE_ALIGN_LEFT, 0, SUBPICTURE_ALIGN_RIGHT };
const int i_id = psz_subtitle[4] - '1';
b_has_align = true;
*pi_align = pi_vertical[i_id/3] | pi_horizontal[i_id%3];
}
/* TODO fr -> rotation */
/* Hide {\stupidity} */
psz_subtitle = strchr( psz_subtitle, '}' ) + 1;
}
else
{
*psz_html = *psz_subtitle;
if( psz_html > psz_html_start )
{
/* Check for double whitespace */
if( ( *psz_html == ' ' || *psz_html == '\t' ) &&
( *(psz_html-1) == ' ' || *(psz_html-1) == '\t' ) )
{
HtmlPut( &psz_html, NO_BREAKING_SPACE );
psz_html--;
}
}
psz_html++;
psz_subtitle++;
}
if( ( size_t )( psz_html - psz_html_start ) > i_buf_size - 50 )
{
int i_len = psz_html - psz_html_start;
i_buf_size += 200;
psz_html_start = realloc( psz_html_start, i_buf_size );
psz_html = psz_html_start + i_len;
*psz_html = '\0';
}
}
strcpy( psz_html, "</text>" );
psz_html += 7;
if( psz_tag[ 0 ] != '\0' )
{
/* Not well formed -- kill everything */
free( psz_html_start );
psz_html_start = NULL;
}
else if( psz_html_start )
{
/* Shrink the memory requirements */
psz_html_start = realloc( psz_html_start, psz_html - psz_html_start + 1 );
}
free( psz_tag );
return psz_html_start;
}
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