/*****************************************************************************
* genttml.c : TTML formatter
*****************************************************************************
* Copyright (C) 2015-2018 VLC authors and VideoLAN
* Copyright (C) 2017-2018 VideoLabs
*
* Authors: Hugo Beauzée-Luyssen <hugo@beauzee.fr>
* Sushma Reddy <sushma.reddy@research.iiit.ac.in>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
//#define TTML_GEN_DEBUG
#include <vlc_common.h>
#include <vlc_strings.h>
#include <assert.h>
#include <stdlib.h>
#include <ctype.h>
#include "ttml.h"
char *tt_genTiming( tt_time_t t )
{
if( !tt_time_Valid( &t ) )
t.base = 0;
unsigned f = t.base % CLOCK_FREQ;
t.base /= CLOCK_FREQ;
unsigned h = t.base / 3600;
unsigned m = t.base % 3600 / 60;
unsigned s = t.base % 60;
int i_ret;
char *psz;
if( f )
{
const char *lz = "000000";
const char *psz_lz = &lz[6];
/* add leading zeroes */
for( unsigned i=10*f; i<CLOCK_FREQ; i *= 10 )
psz_lz--;
/* strip trailing zeroes */
for( ; f > 0 && (f % 10) == 0; f /= 10 );
i_ret = asprintf( &psz, "%02u:%02u:%02u.%s%u",
h, m, s, psz_lz, f );
}
else if( t.frames )
{
i_ret = asprintf( &psz, "%02u:%02u:%02u:%s%u",
h, m, s, t.frames < 10 ? "0" : "", t.frames );
}
else
{
i_ret = asprintf( &psz, "%02u:%02u:%02u",
h, m, s );
}
return i_ret < 0 ? NULL : psz;
}
static void tt_MemstreamPutEntities( struct vlc_memstream *p_stream, const char *psz )
{
char *psz_entities = vlc_xml_encode( psz );
if( psz_entities )
{
vlc_memstream_puts( p_stream, psz_entities );
free( psz_entities );
}
}
void tt_node_AttributesToText( struct vlc_memstream *p_stream, const tt_node_t* p_node )
{
bool b_timed_node = false;
const vlc_dictionary_t* p_attr_dict = &p_node->attr_dict;
for (size_t i = 0; i < p_attr_dict->i_size; ++i)
{
for ( vlc_dictionary_entry_t* p_entry = p_attr_dict->p_entries[i];
p_entry != NULL; p_entry = p_entry->p_next )
{
const char *psz_value = NULL;
if( !strcmp(p_entry->psz_key, "begin") ||
!strcmp(p_entry->psz_key, "end") ||
!strcmp(p_entry->psz_key, "dur") )
{
b_timed_node = true;
/* will remove duration */
continue;
}
else if( !strcmp(p_entry->psz_key, "timeContainer") )
{
/* also remove sequential timings info (all abs now) */
continue;
}
else
{
psz_value = p_entry->p_value;
}
if( psz_value == NULL )
continue;
vlc_memstream_printf( p_stream, " %s=\"", p_entry->psz_key );
tt_MemstreamPutEntities( p_stream, psz_value );
vlc_memstream_putc( p_stream, '"' );
}
}
if( b_timed_node )
{
if( tt_time_Valid( &p_node->timings.begin ) )
{
char *psz = tt_genTiming( p_node->timings.begin );
vlc_memstream_printf( p_stream, " begin=\"%s\"", psz );
free( psz );
}
if( tt_time_Valid( &p_node->timings.end ) )
{
char *psz = tt_genTiming( p_node->timings.end );
vlc_memstream_printf( p_stream, " end=\"%s\"", psz );
free( psz );
}
}
}
void tt_node_ToText( struct vlc_memstream *p_stream, const tt_basenode_t *p_basenode,
const tt_time_t *playbacktime )
{
if( p_basenode->i_type == TT_NODE_TYPE_ELEMENT )
{
const tt_node_t *p_node = (const tt_node_t *) p_basenode;
if( tt_time_Valid( playbacktime ) &&
!tt_timings_Contains( &p_node->timings, playbacktime ) )
return;
vlc_memstream_putc( p_stream, '<' );
tt_MemstreamPutEntities( p_stream, p_node->psz_node_name );
tt_node_AttributesToText( p_stream, p_node );
if( tt_node_HasChild( p_node ) )
{
vlc_memstream_putc( p_stream, '>' );
#ifdef TTML_DEMUX_DEBUG
vlc_memstream_printf( p_stream, "<!-- starts %ld ends %ld -->",
tt_time_Convert( &p_node->timings.begin ),
tt_time_Convert( &p_node->timings.end ) );
#endif
for( const tt_basenode_t *p_child = p_node->p_child;
p_child; p_child = p_child->p_next )
{
tt_node_ToText( p_stream, p_child, playbacktime );
}
vlc_memstream_puts( p_stream, "</" );
tt_MemstreamPutEntities( p_stream, p_node->psz_node_name );
vlc_memstream_putc( p_stream, '>' );
}
else
vlc_memstream_puts( p_stream, "/>" );
}
else
{
const tt_textnode_t *p_textnode = (const tt_textnode_t *) p_basenode;
tt_MemstreamPutEntities( p_stream, p_textnode->psz_text );
}
}
¤ Dauer der Verarbeitung: 0.3 Sekunden
(vorverarbeitet am 2026-11-04)
¤
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