* 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
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
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);
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;
}
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 ));
{
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=\"" );
int i_len;
psz_style += strspn( psz_style, "\"" ) + 1;
- i_len = strspn( psz_style, "\"" );
+ i_len = strcspn( psz_style, "\"" );
psz_style[ i_len ] = '\0';
{
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;
}
}
{
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;
}
}
{
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;
}
}
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, "<", 4 ))
+ {
+ *psz_text++ = '<';
+ psz_subtitle += strcspn( psz_subtitle, ";" );
+ }
+ else if( !strncasecmp( psz_subtitle, ">", 4 ))
+ {
+ *psz_text++ = '>';
+ psz_subtitle += strcspn( psz_subtitle, ";" );
+ }
+ else if( !strncasecmp( psz_subtitle, "&", 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, "<", 4 ))
+ {
+ strcpy( psz_html, "<" );
+ psz_html += 4;
+ psz_subtitle += 4;
+ }
+ else if( !strncasecmp( psz_subtitle, ">", 4 ))
+ {
+ strcpy( psz_html, ">" );
+ psz_html += 4;
+ psz_subtitle += 4;
+ }
+ else if( !strncasecmp( psz_subtitle, "&", 5 ))
+ {
+ strcpy( psz_html, "&" );
+ psz_html += 5;
+ psz_subtitle += 5;
+ }
+ else
+ {
+ strcpy( psz_html, "&" );
+ 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;
}
projects / vlc / commitdiff