You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
3.8 KiB
125 lines
3.8 KiB
/*****************************************************************************
|
|
* t140.c : trivial T.140 text encoder
|
|
*****************************************************************************
|
|
* Copyright © 2007 Rémi Denis-Courmont
|
|
*
|
|
* 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.
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
|
|
#include <vlc_common.h>
|
|
#include <vlc_plugin.h>
|
|
#include <vlc_codec.h>
|
|
#include <vlc_sout.h>
|
|
|
|
static int Open ( vlc_object_t * );
|
|
|
|
vlc_module_begin ()
|
|
set_description( N_("T.140 text encoder") )
|
|
set_capability( "spu encoder", 100 )
|
|
set_callback( Open )
|
|
vlc_module_end ()
|
|
|
|
|
|
static block_t *Encode ( encoder_t *, subpicture_t * );
|
|
|
|
|
|
static int Open( vlc_object_t *p_this )
|
|
{
|
|
encoder_t *p_enc = (encoder_t *)p_this;
|
|
|
|
switch( p_enc->fmt_out.i_codec )
|
|
{
|
|
case VLC_CODEC_SUBT:
|
|
if( ( p_enc->fmt_out.subs.psz_encoding != NULL )
|
|
&& strcasecmp( p_enc->fmt_out.subs.psz_encoding, "utf8" )
|
|
&& strcasecmp( p_enc->fmt_out.subs.psz_encoding, "UTF-8" ) )
|
|
{
|
|
msg_Err( p_this, "Only UTF-8 encoding supported" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
case VLC_CODEC_ITU_T140:
|
|
break;
|
|
|
|
default:
|
|
if( !p_enc->obj.force )
|
|
return VLC_EGENERIC;
|
|
|
|
p_enc->fmt_out.i_codec = VLC_CODEC_ITU_T140;
|
|
}
|
|
|
|
static const struct vlc_encoder_operations ops =
|
|
{ .encode_sub = Encode };
|
|
p_enc->ops = &ops;
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
static block_t *Encode( encoder_t *p_enc, subpicture_t *p_spu )
|
|
{
|
|
VLC_UNUSED( p_enc );
|
|
|
|
subpicture_region_t *p_region;
|
|
block_t *p_block;
|
|
size_t len = 0;
|
|
|
|
if( p_spu == NULL )
|
|
return NULL;
|
|
|
|
p_region = vlc_spu_regions_first_or_null(&p_spu->regions);
|
|
if( ( p_region == NULL )
|
|
|| (!subpicture_region_IsText( p_region ))
|
|
|| ( p_region->p_text == NULL )
|
|
|| ( p_region->p_text->psz_text == NULL) )
|
|
return NULL;
|
|
|
|
/* This should already be UTF-8 encoded, so not much effort... */
|
|
for( const text_segment_t *p_segment = p_region->p_text;
|
|
p_segment; p_segment = p_segment->p_next )
|
|
{
|
|
if( p_segment->psz_text == NULL )
|
|
continue;
|
|
len += strlen( p_segment->psz_text );
|
|
}
|
|
|
|
p_block = block_Alloc( len + 1 );
|
|
if( !p_block )
|
|
return NULL;
|
|
|
|
p_block->i_buffer = 0;
|
|
for( const text_segment_t *p_segment = p_region->p_text;
|
|
p_segment; p_segment = p_segment->p_next )
|
|
{
|
|
if( p_segment->psz_text == NULL )
|
|
continue;
|
|
len = strlen( p_segment->psz_text );
|
|
memcpy( &p_block->p_buffer[p_block->i_buffer],
|
|
p_segment->psz_text, len );
|
|
p_block->i_buffer += len;
|
|
}
|
|
p_block->p_buffer[p_block->i_buffer] = 0;
|
|
|
|
p_block->i_pts = p_block->i_dts = p_spu->i_start;
|
|
if( !p_spu->b_ephemer &&
|
|
( p_spu->i_stop != VLC_TICK_INVALID && p_spu->i_stop > p_spu->i_start ) )
|
|
p_block->i_length = p_spu->i_stop - p_spu->i_start;
|
|
|
|
return p_block;
|
|
}
|
|
|