* 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
* Preamble
*****************************************************************************/
#include <vlc/vlc.h>
-#include <vlc/vout.h>
-#include <vlc/decoder.h>
+#include <vlc_vout.h>
+#include <vlc_codec.h>
-#include "vlc_osd.h"
-#include "vlc_filter.h"
-#include "charset.h"
+#include <vlc_osd.h>
+#include <vlc_filter.h>
+#include <vlc_charset.h>
+#include <vlc_stream.h>
+#include <vlc_xml.h>
+#include <errno.h>
+#include <string.h>
typedef struct
{
static subpicture_t *DecodeBlock ( decoder_t *, block_t ** );
static subpicture_t *ParseText ( decoder_t *, block_t * );
static void ParseSSAHeader ( decoder_t * );
+static void ParseUSFHeader ( decoder_t * );
+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
vlc_value_t val;
if( p_dec->fmt_in.i_codec != VLC_FOURCC('s','u','b','t') &&
+ p_dec->fmt_in.i_codec != VLC_FOURCC('u','s','f',' ') &&
p_dec->fmt_in.i_codec != VLC_FOURCC('s','s','a',' ') )
{
return VLC_EGENERIC;
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys =
- (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
+ (decoder_sys_t *)calloc(1, sizeof(decoder_sys_t)) ) == NULL )
{
msg_Err( p_dec, "out of memory" );
return VLC_ENOMEM;
p_sys->pp_ssa_styles = NULL;
p_sys->i_ssa_styles = 0;
+ char *psz_charset = NULL;
+ /* First try demux-specified encoding */
if( p_dec->fmt_in.subs.psz_encoding && *p_dec->fmt_in.subs.psz_encoding )
{
- msg_Dbg( p_dec, "using demux suggested character encoding: %s",
- p_dec->fmt_in.subs.psz_encoding );
- if( strcmp( p_dec->fmt_in.subs.psz_encoding, "UTF-8" ) )
- p_sys->iconv_handle = vlc_iconv_open( "UTF-8", 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");
}
- else
+
+ /* Second, try configured encoding */
+ if (psz_charset == NULL)
{
- var_Create( p_dec, "subsdec-encoding",
- VLC_VAR_STRING | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "subsdec-encoding", &val );
- if( !strcmp( val.psz_string, DEFAULT_NAME ) )
+ psz_charset = var_CreateGetNonEmptyString (p_dec, "subsdec-encoding");
+ if ((psz_charset != NULL) && !strcasecmp (psz_charset, DEFAULT_NAME))
{
- const char *psz_charset = GetFallbackEncoding();
+ free (psz_charset);
+ psz_charset = NULL;
+ }
- p_sys->b_autodetect_utf8 = var_CreateGetBool( p_dec,
- "subsdec-autodetect-utf8" );
+ msg_Dbg (p_dec, "trying configured character encoding: %s",
+ psz_charset ?: "not specified");
+ }
- p_sys->iconv_handle = vlc_iconv_open( "UTF-8", psz_charset );
- msg_Dbg( p_dec, "using fallback character encoding: %s", psz_charset );
- }
- else if( !strcmp( val.psz_string, "UTF-8" ) )
- {
- msg_Dbg( p_dec, "using enforced character encoding: UTF-8" );
- }
- else if( val.psz_string )
+ /* 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 enforced character encoding: %s", val.psz_string );
- p_sys->iconv_handle = vlc_iconv_open( "UTF-8", val.psz_string );
- if( p_sys->iconv_handle == (vlc_iconv_t)-1 )
- {
- msg_Warn( p_dec, "unable to do requested conversion" );
- }
+ msg_Dbg (p_dec, "using automatic UTF-8 detection");
+ p_sys->b_autodetect_utf8 = VLC_TRUE;
}
- if( val.psz_string ) free( val.psz_string );
}
+ if (psz_charset == NULL)
+ {
+ psz_charset = strdup ("UTF-8");
+ msg_Dbg (p_dec, "trying hard-coded character encoding: %s",
+ psz_charset ?: "error");
+ }
+
+ if (psz_charset == NULL)
+ {
+ free (p_sys);
+ return VLC_ENOMEM;
+ }
+
+ if (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: %s", psz_charset,
+ strerror (errno));
+ }
+ 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_extra > 0 )
ParseSSAHeader( p_dec );
}
+ else if( p_dec->fmt_in.i_codec == VLC_FOURCC('u','s','f',' ') && var_CreateGetBool( p_dec, "subsdec-formatted" ) )
+ {
+ if( p_dec->fmt_in.i_extra > 0 )
+ ParseUSFHeader( p_dec );
+ }
return VLC_SUCCESS;
}
return NULL;
if( p_sys->iconv_handle == (vlc_iconv_t)-1 )
- EnsureUTF8( psz_subtitle );
+ {
+ 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
{
}
/* Decode and format the subpicture unit */
- if( p_dec->fmt_in.i_codec != VLC_FOURCC('s','s','a',' ') )
+ if( p_dec->fmt_in.i_codec != VLC_FOURCC('s','s','a',' ') &&
+ p_dec->fmt_in.i_codec != VLC_FOURCC('u','s','f',' ') )
{
/* Normal text subs, easy markup */
p_spu->i_flags = SUBPICTURE_ALIGN_BOTTOM | p_sys->i_align;
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_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);
}
else
{
- /* Decode SSA strings */
- ParseSSAString( p_dec, psz_subtitle, p_spu );
+ /* Decode SSA/USF strings */
+ if( p_dec->fmt_in.i_codec == VLC_FOURCC('s','s','a',' ') )
+ ParseSSAString( p_dec, psz_subtitle, p_spu );
+ else
+ ParseUSFString( 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 = 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;
}
+static void ParseUSFString( decoder_t *p_dec, char *psz_subtitle, subpicture_t *p_spu_in )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ subpicture_t *p_spu = p_spu_in;
+ char *psz_text;
+ char *psz_text_start;
+ ssa_style_t *p_style = NULL;
+ int i;
+
+ /* Create a text only copy of the subtitle (for legacy implementations) and copy
+ * the rich html version across as is - for parsing by a rendering engine capable
+ * of understanding it.
+ */
+ p_spu->p_region->psz_text = NULL;
+ p_spu->p_region->psz_html = strdup( psz_subtitle );
+
+ for( i = 0; i < p_sys->i_ssa_styles; i++ )
+ {
+ if( !strcasecmp( p_sys->pp_ssa_styles[i]->psz_stylename, "Default" ) )
+ p_style = p_sys->pp_ssa_styles[i];
+ }
+
+ /* The StripTags() function doesn't do everything we need (eg. <br/> tag )
+ * so do it here ourselves.
+ */
+ psz_text_start = malloc( strlen( psz_subtitle ));
+
+ psz_text = psz_text_start;
+ while( *psz_subtitle )
+ {
+ if( *psz_subtitle == '<' )
+ {
+ if( !strncasecmp( psz_subtitle, "<br/>", 5 ))
+ *psz_text++ = '\n';
+ else if( !strncasecmp( psz_subtitle, "<text ", 6 ))
+ {
+ char *psz_style = strcasestr( psz_subtitle, "style=\"" );
+
+ if( psz_style && ( psz_style < strchr( psz_subtitle, '>' ) ))
+ {
+ int i_len;
+
+ psz_style += strspn( psz_style, "\"" ) + 1;
+ i_len = strcspn( psz_style, "\"" );
+
+ psz_style[ i_len ] = '\0';
+
+ for( i = 0; i < p_sys->i_ssa_styles; i++ )
+ {
+ if( !strcmp( p_sys->pp_ssa_styles[i]->psz_stylename, psz_style ) )
+ p_style = p_sys->pp_ssa_styles[i];
+ }
+
+ psz_style[ i_len ] = '\"';
+ }
+ }
+
+ psz_subtitle += strcspn( psz_subtitle, ">" );
+ }
+ else if( *psz_subtitle == '&' )
+ {
+ if( !strncasecmp( psz_subtitle, "<", 4 ))
+ *psz_text++ = '<';
+ else if( !strncasecmp( psz_subtitle, ">", 4 ))
+ *psz_text++ = '>';
+ else if( !strncasecmp( psz_subtitle, "&", 5 ))
+ *psz_text++ = '&';
+
+ psz_subtitle += strcspn( psz_subtitle, ";" );
+ }
+ else if( ( *psz_subtitle == '\t' ) ||
+ ( *psz_subtitle == '\r' ) ||
+ ( *psz_subtitle == '\n' ) ||
+ ( *psz_subtitle == ' ' ) )
+ {
+ if( ( psz_text_start < psz_text ) &&
+ ( *(psz_text-1) != ' ' ) )
+ {
+ *psz_text++ = ' ';
+ }
+ }
+ else
+ *psz_text++ = *psz_subtitle;
+
+ psz_subtitle++;
+ }
+ *psz_text = '\0';
+ p_spu->p_region->psz_text = strdup( psz_text_start );
+ free( psz_text_start );
+
+ if( p_style == NULL )
+ {
+ p_spu->i_flags = SUBPICTURE_ALIGN_BOTTOM | p_sys->i_align;
+ p_spu->i_x = p_sys->i_align ? 20 : 0;
+ p_spu->i_y = 10;
+ }
+ else
+ {
+ msg_Dbg( p_dec, "style is: %s", p_style->psz_stylename);
+ p_spu->p_region->p_style = &p_style->font_style;
+ p_spu->i_flags = p_style->i_align;
+ }
+}
+
static void ParseSSAString( decoder_t *p_dec, char *psz_subtitle, subpicture_t *p_spu_in )
{
/* We expect MKV formatted SSA:
psz_buffer_sub = psz_subtitle;
+ p_spu->p_region->psz_html = NULL;
+
i_comma = 0;
while( i_comma < 8 && *psz_buffer_sub != '\0' )
{
*pi_alpha = ( i_color & 0xFF000000 ) >> 24;
}
+/*****************************************************************************
+ * ParseUSFHeader: Retrieve global formatting information etc
+ *****************************************************************************/
+static void ParseUSFHeader( decoder_t *p_dec )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ stream_t *p_sub = NULL;
+ xml_t *p_xml = NULL;
+ xml_reader_t *p_xml_reader = NULL;
+
+ p_sub = stream_MemoryNew( VLC_OBJECT(p_dec),
+ p_dec->fmt_in.p_extra,
+ p_dec->fmt_in.i_extra,
+ VLC_TRUE );
+ if( p_sub )
+ {
+ p_xml = xml_Create( p_dec );
+ if( p_xml )
+ {
+ p_xml_reader = xml_ReaderCreate( p_xml, p_sub );
+ if( p_xml_reader )
+ {
+ /* Look for Root Node */
+ if( xml_ReaderRead( p_xml_reader ) == 1 )
+ {
+ char *psz_node = xml_ReaderName( p_xml_reader );
+
+ if( !strcasecmp( "usfsubtitles", psz_node ) )
+ ParseUSFHeaderTags( p_sys, p_xml_reader );
+
+ free( psz_node );
+ }
+
+ xml_ReaderDelete( p_xml, p_xml_reader );
+ }
+ xml_Delete( p_xml );
+ }
+ stream_Delete( p_sub );
+ }
+}
+
+static void ParseUSFHeaderTags( decoder_sys_t *p_sys, xml_reader_t *p_xml_reader )
+{
+ char *psz_node;
+ ssa_style_t *p_style = NULL;
+ int i_style_level = 0;
+ int i_metadata_level = 0;
+
+ while ( xml_ReaderRead( p_xml_reader ) == 1 )
+ {
+ switch ( xml_ReaderNodeType( p_xml_reader ) )
+ {
+ case XML_READER_TEXT:
+ case XML_READER_NONE:
+ break;
+ case XML_READER_ENDELEM:
+ psz_node = xml_ReaderName( p_xml_reader );
+
+ if( psz_node )
+ {
+ switch (i_style_level)
+ {
+ case 0:
+ if( !strcasecmp( "metadata", psz_node ) && (i_metadata_level == 1) )
+ {
+ i_metadata_level--;
+ }
+ break;
+ case 1:
+ if( !strcasecmp( "styles", psz_node ) )
+ {
+ i_style_level--;
+ }
+ break;
+ case 2:
+ if( !strcasecmp( "style", psz_node ) )
+ {
+ p_style->font_style.i_text_align = p_style->i_align;
+
+ TAB_APPEND( p_sys->i_ssa_styles, p_sys->pp_ssa_styles, p_style );
+
+ p_style = NULL;
+ i_style_level--;
+ }
+ break;
+ }
+
+ free( psz_node );
+ }
+ break;
+ case XML_READER_STARTELEM:
+ psz_node = xml_ReaderName( p_xml_reader );
+
+ if( psz_node )
+ {
+ if( !strcasecmp( "metadata", psz_node ) && (i_style_level == 0) )
+ {
+ i_metadata_level++;
+ }
+ else if( !strcasecmp( "resolution", psz_node ) && (i_metadata_level == 1) )
+ {
+ while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
+ {
+ char *psz_name = xml_ReaderName ( p_xml_reader );
+ char *psz_value = xml_ReaderValue ( p_xml_reader );
+
+ if( psz_name && psz_value )
+ {
+ if( !strcasecmp( "x", psz_name ) )
+ p_sys->i_original_width = atoi( psz_value );
+ else if( !strcasecmp( "y", psz_name ) )
+ p_sys->i_original_height = atoi( psz_value );
+ }
+ if( psz_name ) free( psz_name );
+ if( psz_value ) free( psz_value );
+ }
+ }
+ else if( !strcasecmp( "styles", psz_node ) && (i_style_level == 0) )
+ {
+ i_style_level++;
+ }
+ else if( !strcasecmp( "style", psz_node ) && (i_style_level == 1) )
+ {
+ i_style_level++;
+
+ p_style = calloc( 1, sizeof(ssa_style_t) );
+
+ while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
+ {
+ char *psz_name = xml_ReaderName ( p_xml_reader );
+ char *psz_value = xml_ReaderValue ( p_xml_reader );
+
+ if( psz_name && psz_value )
+ {
+ if( !strcasecmp( "name", psz_name ) )
+ p_style->psz_stylename = strdup( psz_value);
+ }
+ if( psz_name ) free( psz_name );
+ if( psz_value ) free( psz_value );
+ }
+ }
+ else if( !strcasecmp( "fontstyle", psz_node ) && (i_style_level == 2) )
+ {
+ while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
+ {
+ char *psz_name = xml_ReaderName ( p_xml_reader );
+ char *psz_value = xml_ReaderValue ( p_xml_reader );
+
+ if( psz_name && psz_value )
+ {
+ if( !strcasecmp( "face", psz_name ) )
+ p_style->font_style.psz_fontname = strdup( psz_value);
+ else if( !strcasecmp( "size", psz_name ) )
+ p_style->font_style.i_font_size = atoi( psz_value);
+ else if( !strcasecmp( "italic", psz_name ) )
+ {
+ if( !strcasecmp( "yes", psz_value ))
+ p_style->font_style.i_style_flags |= STYLE_ITALIC;
+ }
+ else if( !strcasecmp( "weight", psz_name ) )
+ {
+ if( !strcasecmp( "bold", psz_value ))
+ p_style->font_style.i_style_flags |= STYLE_BOLD;
+ }
+ else if( !strcasecmp( "underline", psz_name ) )
+ {
+ if( !strcasecmp( "yes", psz_value ))
+ p_style->font_style.i_style_flags |= STYLE_UNDERLINE;
+ }
+ else if( !strcasecmp( "color", psz_name ) )
+ {
+ if( *psz_value == '#' )
+ {
+ unsigned long col = strtol(psz_value+1, NULL, 16);
+ p_style->font_style.i_font_color = (col & 0x00ffffff);
+ /* From DTD: <!-- alpha range = 0..100 --> */
+ p_style->font_style.i_font_alpha = ((col >> 24) & 0xff) * 255 / 100;
+ }
+ }
+ else if( !strcasecmp( "outline-color", psz_name ) )
+ {
+ if( *psz_value == '#' )
+ {
+ unsigned long col = strtol(psz_value+1, NULL, 16);
+ p_style->font_style.i_outline_color = (col & 0x00ffffff);
+ /* From DTD: <!-- alpha range = 0..100 --> */
+ p_style->font_style.i_outline_alpha = ((col >> 24) & 0xff) * 255 / 100;
+ }
+ }
+ else if( !strcasecmp( "shadow-color", psz_name ) )
+ {
+ if( *psz_value == '#' )
+ {
+ unsigned long col = strtol(psz_value+1, NULL, 16);
+ p_style->font_style.i_shadow_color = (col & 0x00ffffff);
+ /* From DTD: <!-- alpha range = 0..100 --> */
+ p_style->font_style.i_shadow_alpha = ((col >> 24) & 0xff) * 255 / 100;
+ }
+ }
+ }
+ if( psz_name ) free( psz_name );
+ if( psz_value ) free( psz_value );
+ }
+ }
+ else if( !strcasecmp( "position", psz_node ) && (i_style_level == 2) )
+ {
+ while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
+ {
+ char *psz_name = xml_ReaderName ( p_xml_reader );
+ char *psz_value = xml_ReaderValue ( p_xml_reader );
+
+ if( psz_name && psz_value )
+ {
+ if( !strcasecmp( "alignment", psz_name ) )
+ {
+ if( !strcasecmp( "TopLeft", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_TOP;
+ p_style->i_align |= SUBPICTURE_ALIGN_LEFT;
+ }
+ else if( !strcasecmp( "TopCenter", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_TOP;
+ }
+ else if( !strcasecmp( "TopRight", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_TOP;
+ p_style->i_align |= SUBPICTURE_ALIGN_RIGHT;
+ }
+ else if( !strcasecmp( "MiddleLeft", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_LEFT;
+ }
+ else if( !strcasecmp( "MiddleCenter", psz_value ) )
+ {
+ p_style->i_align = 0;
+ }
+ else if( !strcasecmp( "MiddleRight", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_RIGHT;
+ }
+ else if( !strcasecmp( "BottomLeft", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_BOTTOM;
+ p_style->i_align |= SUBPICTURE_ALIGN_LEFT;
+ }
+ else if( !strcasecmp( "BottomCenter", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_BOTTOM;
+ }
+ else if( !strcasecmp( "BottomRight", psz_value ) )
+ {
+ p_style->i_align |= SUBPICTURE_ALIGN_BOTTOM;
+ p_style->i_align |= SUBPICTURE_ALIGN_RIGHT;
+ }
+ }
+ }
+ if( psz_name ) free( psz_name );
+ if( psz_value ) free( psz_value );
+ }
+ }
+
+ free( psz_node );
+ }
+ break;
+ }
+ }
+ if( p_style ) free( p_style );
+}
/*****************************************************************************
* ParseSSAHeader: Retrieve global formatting information etc
*****************************************************************************/
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 / blobdiff