Commit db7b0a56 authored by hartman's avatar hartman
Browse files

* Patch to support basic formatting in non-SSA/USF subtitle formats

  Several fixes for warnings.

  by Bernie Purcell <b dot purcell at adbglobal dot com> 
parent 3740b744
......@@ -7,6 +7,7 @@
* Authors: Gildas Bazin <gbazin@videolan.org>
* Samuel Hocevar <sam@zoy.org>
* Derk-Jan Hartman <hartman at videolan dot org>
* Bernie Purcell <b dot purcell at adbglobal dot com>
*
* 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
......@@ -77,7 +78,8 @@ static void ParseUSFHeaderTags( decoder_sys_t *, xml_reader_t * );
static void ParseSSAString ( decoder_t *, char *, subpicture_t * );
static void ParseUSFString ( decoder_t *, char *, subpicture_t * );
static void ParseColor ( decoder_t *, char *, int *, int * );
static void StripTags ( char * );
static char *StripTags ( char * );
static char *CreateHtmlSubtitle ( char * );
#define DEFAULT_NAME "Default"
#define MAX_LINE 8192
......@@ -451,10 +453,10 @@ static subpicture_t *ParseText( decoder_t *p_dec, block_t *p_block )
p_spu->i_y = 10;
/* Remove formatting from string */
StripTags( psz_subtitle );
p_spu->p_region->psz_text = psz_subtitle;
p_spu->p_region->psz_html = NULL;
p_spu->p_region->psz_text = StripTags( psz_subtitle );
p_spu->p_region->psz_html = CreateHtmlSubtitle( 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);
......@@ -474,8 +476,9 @@ static subpicture_t *ParseText( decoder_t *p_dec, block_t *p_block )
p_spu->b_absolute = VLC_FALSE;
p_spu->i_original_picture_width = p_sys->i_original_width;
p_spu->i_original_picture_height = p_sys->i_original_height;
if( psz_subtitle ) free( psz_subtitle );
}
if( psz_subtitle ) free( psz_subtitle );
return p_spu;
}
......@@ -501,8 +504,7 @@ static void ParseUSFString( decoder_t *p_dec, char *psz_subtitle, subpicture_t *
p_style = p_sys->pp_ssa_styles[i];
}
/* The StripTags() function doesn't handle HTML tags that have attribute/values with
* them, or properly translate <br/> sequences into newlines, or handle &' sequences
/* The StripTags() function doesn't do everything we need (eg. <br/> tag )
* so do it here ourselves.
*/
psz_text_start = malloc( strlen( psz_subtitle ));
......@@ -514,7 +516,7 @@ static void ParseUSFString( decoder_t *p_dec, char *psz_subtitle, subpicture_t *
{
if( !strncasecmp( psz_subtitle, "<br/>", 5 ))
*psz_text++ = '\n';
else if( strncasecmp( psz_subtitle, "<text ", 6 ))
else if( !strncasecmp( psz_subtitle, "<text ", 6 ))
{
char *psz_style = strcasestr( psz_subtitle, "style=\"" );
......@@ -523,7 +525,7 @@ static void ParseUSFString( decoder_t *p_dec, char *psz_subtitle, subpicture_t *
int i_len;
psz_style += strspn( psz_style, "\"" ) + 1;
i_len = strspn( psz_style, "\"" );
i_len = strcspn( psz_style, "\"" );
psz_style[ i_len ] = '\0';
......@@ -913,7 +915,7 @@ static void ParseUSFHeaderTags( decoder_sys_t *p_sys, xml_reader_t *p_xml_reader
{
unsigned long col = strtol(psz_value+1, NULL, 16);
p_style->font_style.i_font_color = (col & 0x00ffffff);
// From DTD: <!-- alpha range = 0..100 -->
/* From DTD: <!-- alpha range = 0..100 --> */
p_style->font_style.i_font_alpha = ((col >> 24) & 0xff) * 255 / 100;
}
}
......@@ -923,7 +925,7 @@ static void ParseUSFHeaderTags( decoder_sys_t *p_sys, xml_reader_t *p_xml_reader
{
unsigned long col = strtol(psz_value+1, NULL, 16);
p_style->font_style.i_outline_color = (col & 0x00ffffff);
// From DTD: <!-- alpha range = 0..100 -->
/* From DTD: <!-- alpha range = 0..100 --> */
p_style->font_style.i_outline_alpha = ((col >> 24) & 0xff) * 255 / 100;
}
}
......@@ -933,7 +935,7 @@ static void ParseUSFHeaderTags( decoder_sys_t *p_sys, xml_reader_t *p_xml_reader
{
unsigned long col = strtol(psz_value+1, NULL, 16);
p_style->font_style.i_shadow_color = (col & 0x00ffffff);
// From DTD: <!-- alpha range = 0..100 -->
/* From DTD: <!-- alpha range = 0..100 --> */
p_style->font_style.i_shadow_alpha = ((col >> 24) & 0xff) * 255 / 100;
}
}
......@@ -1166,45 +1168,293 @@ eof:
return;
}
static void StripTags( char *psz_text )
/* Function now handles tags which has 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 )
{
int i_left_moves = 0;
vlc_bool_t b_inside_tag = VLC_FALSE;
int i = 0;
int i_tag_start = -1;
while( psz_text[ i ] )
char *psz_text_start;
psz_text_start = malloc( strlen( psz_subtitle ) + 1 );
if( psz_text_start != NULL )
{
if( !b_inside_tag )
char *psz_text = psz_text_start;
while( *psz_subtitle )
{
if( psz_text[ i ] == '<' )
if( *psz_subtitle == '<' )
{
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
{
/* Assume it is just a normal ampersand */
*psz_text++ = '&';
}
}
else
{
b_inside_tag = VLC_TRUE;
i_tag_start = i;
*psz_text++ = *psz_subtitle;
}
psz_text[ i - i_left_moves ] = psz_text[ i ];
psz_subtitle++;
}
else
*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 char *CreateHtmlSubtitle( char *psz_subtitle )
{
char psz_tagStack[ 100 ];
size_t i_buf_size = strlen( psz_subtitle ) + 100;
char *psz_html_start = malloc( i_buf_size );
psz_tagStack[ 0 ] = '\0';
if( psz_html_start != NULL )
{
char *psz_html = psz_html_start;
strcpy( psz_html, "<text>" );
psz_html += 6;
while( *psz_subtitle )
{
if( ( psz_text[ i ] == ' ' ) ||
( psz_text[ i ] == '\t' ) ||
( psz_text[ i ] == '\n' ) ||
( psz_text[ i ] == '\r' ) )
if( *psz_subtitle == '\n' )
{
b_inside_tag = VLC_FALSE;
i_tag_start = -1;
strcpy( psz_html, "<br/>" );
psz_html += 5;
psz_subtitle++;
}
else if( psz_text[ i ] == '>' )
else if( *psz_subtitle == '<' )
{
i_left_moves += i - i_tag_start + 1;
i_tag_start = -1;
b_inside_tag = VLC_FALSE;
if( !strncasecmp( psz_subtitle, "<br/>", 5 ))
{
strcpy( psz_html, "<br/>" );
psz_html += 5;
psz_subtitle += 5;
}
else if( !strncasecmp( psz_subtitle, "<b>", 3 ) )
{
strcpy( psz_html, "<b>" );
strcat( psz_tagStack, "b" );
psz_html += 3;
psz_subtitle += 3;
}
else if( !strncasecmp( psz_subtitle, "<i>", 3 ) )
{
strcpy( psz_html, "<i>" );
strcat( psz_tagStack, "i" );
psz_html += 3;
psz_subtitle += 3;
}
else if( !strncasecmp( psz_subtitle, "<u>", 3 ) )
{
strcpy( psz_html, "<u>" );
strcat( psz_tagStack, "u" );
psz_html += 3;
psz_subtitle += 3;
}
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 };
strcpy( psz_html, "<font " );
strcat( psz_tagStack, "f" );
psz_html += 6;
psz_subtitle += 6;
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 ))
{
i_len += strcspn( psz_subtitle + i_len, "\"" ) + 1;
strncpy( psz_html, psz_subtitle, i_len );
psz_html += i_len;
psz_subtitle += i_len;
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 ))
{
vlc_bool_t b_match = VLC_FALSE;
int i_len = strlen( psz_tagStack ) - 1;
char *psz_lastTag = NULL;
if( i_len >= 0 )
{
psz_lastTag = psz_tagStack + 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;
}
}
if( ! b_match )
{
/* Not well formed -- kill everything */
free( psz_html_start );
psz_html_start = NULL;
break;
}
*psz_lastTag = '\0';
strncpy( psz_html, psz_subtitle, i_len );
psz_html += i_len;
psz_subtitle += i_len;
}
else
{
psz_subtitle += strcspn( psz_subtitle, ">" );
}
}
else if( *psz_subtitle == '&' )
{
if( !strncasecmp( psz_subtitle, "&lt;", 4 ))
{
strcpy( psz_html, "&lt;" );
psz_html += 4;
psz_subtitle += 4;
}
else if( !strncasecmp( psz_subtitle, "&gt;", 4 ))
{
strcpy( psz_html, "&gt;" );
psz_html += 4;
psz_subtitle += 4;
}
else if( !strncasecmp( psz_subtitle, "&amp;", 5 ))
{
strcpy( psz_html, "&amp;" );
psz_html += 5;
psz_subtitle += 5;
}
else
{
strcpy( psz_html, "&amp;" );
psz_html += 5;
psz_subtitle++;
}
}
else
{
psz_text[ i - i_left_moves ] = psz_text[ i ];
*psz_html++ = *psz_subtitle++;
}
if( ( size_t )( psz_html - psz_html_start ) > i_buf_size - 10 )
{
int i_len = psz_html - psz_html_start;
i_buf_size += 100;
psz_html_start = realloc( psz_html_start, i_buf_size );
psz_html = psz_html_start + i_len;
*psz_html = '\0';
}
}
i++;
strcpy( psz_html, "</text>" );
psz_html += 7;
if( psz_tagStack[ 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 );
}
}
psz_text[ i - i_left_moves ] = '\0';
return psz_html_start;
}
/*****************************************************************************
* freetype.c : Put text on the video, using freetype2
*****************************************************************************
* Copyright (C) 2002 - 2005 the VideoLAN team
* Copyright (C) 2002 - 2007 the VideoLAN team
* $Id$
*
* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
* Gildas Bazin <gbazin@videolan.org>
* Bernie Purcell <b dot purcell at adbglobal dot com>
*
* 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
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment