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/*****************************************************************************
* spu.c: transcoding stream output module (spu)
*****************************************************************************
* Copyright (C) 2003-2009 VLC authors and VideoLAN
* $Id: 50d9e2d73258e4d6eaafc90cc232dfa6de38a6d6 $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
* Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
* Antoine Cellerier <dionoea at videolan dot org>
*
* 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "transcode.h"
#include <vlc_meta.h>
#include <vlc_spu.h>
#include <vlc_modules.h>
#include <assert.h>
static subpicture_t *spu_new_buffer( decoder_t *p_dec,
const subpicture_updater_t *p_upd )
{
VLC_UNUSED( p_dec );
subpicture_t *p_subpicture = subpicture_New( p_upd );
if( likely(p_subpicture != NULL) )
p_subpicture->b_subtitle = true;
return p_subpicture;
}
static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
{
VLC_UNUSED( p_dec );
subpicture_Delete( p_subpic );
}
int transcode_spu_new( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
/*
* Open decoder
*/
/* Initialization of decoder structures */
id->p_decoder->pf_decode_sub = NULL;
id->p_decoder->pf_spu_buffer_new = spu_new_buffer;
id->p_decoder->pf_spu_buffer_del = spu_del_buffer;
id->p_decoder->p_owner = (decoder_owner_sys_t *)p_stream;
/* id->p_decoder->p_cfg = p_sys->p_spu_cfg; */
id->p_decoder->p_module =
module_need( id->p_decoder, "decoder", "$codec", false );
if( !id->p_decoder->p_module )
{
msg_Err( p_stream, "cannot find spu decoder" );
return VLC_EGENERIC;
}
if( !p_sys->b_soverlay )
{
/* Open encoder */
/* Initialization of encoder format structures */
es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
id->p_decoder->fmt_in.i_codec );
id->p_encoder->p_cfg = p_sys->p_spu_cfg;
id->p_encoder->p_module =
module_need( id->p_encoder, "encoder", p_sys->psz_senc, true );
if( !id->p_encoder->p_module )
{
module_unneed( id->p_decoder, id->p_decoder->p_module );
msg_Err( p_stream, "cannot find spu encoder (%s)", p_sys->psz_senc );
return VLC_EGENERIC;
}
}
if( !p_sys->p_spu )
p_sys->p_spu = spu_Create( p_stream );
return VLC_SUCCESS;
}
void transcode_spu_close( sout_stream_t *p_stream, sout_stream_id_sys_t *id)
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
/* Close decoder */
if( id->p_decoder->p_module )
module_unneed( id->p_decoder, id->p_decoder->p_module );
if( id->p_decoder->p_description )
vlc_meta_Delete( id->p_decoder->p_description );
/* Close encoder */
if( id->p_encoder->p_module )
module_unneed( id->p_encoder, id->p_encoder->p_module );
if( p_sys->p_spu )
{
spu_Destroy( p_sys->p_spu );
p_sys->p_spu = NULL;
}
}
int transcode_spu_process( sout_stream_t *p_stream,
sout_stream_id_sys_t *id,
block_t *in, block_t **out )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
subpicture_t *p_subpic;
*out = NULL;
p_subpic = id->p_decoder->pf_decode_sub( id->p_decoder, &in );
if( !p_subpic )
{
/* We just don't have anything to handle now, go own*/
return VLC_SUCCESS;
}
if( p_sys->b_master_sync && p_sys->i_master_drift )
{
p_subpic->i_start -= p_sys->i_master_drift;
if( p_subpic->i_stop ) p_subpic->i_stop -= p_sys->i_master_drift;
}
if( p_sys->b_soverlay )
{
spu_PutSubpicture( p_sys->p_spu, p_subpic );
return VLC_SUCCESS;
}
else
{
block_t *p_block;
p_block = id->p_encoder->pf_encode_sub( id->p_encoder, p_subpic );
spu_del_buffer( id->p_decoder, p_subpic );
if( p_block )
{
block_ChainAppend( out, p_block );
return VLC_SUCCESS;
}
}
return VLC_EGENERIC;
}
bool transcode_spu_add( sout_stream_t *p_stream, es_format_t *p_fmt,
sout_stream_id_sys_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
if( p_sys->i_scodec )
{
msg_Dbg( p_stream, "creating subtitle transcoding from fcc=`%4.4s' "
"to fcc=`%4.4s'", (char*)&p_fmt->i_codec,
(char*)&p_sys->i_scodec );
/* Complete destination format */
id->p_encoder->fmt_out.i_codec = p_sys->i_scodec;
/* build decoder -> filter -> encoder */
if( transcode_spu_new( p_stream, id ) )
{
msg_Err( p_stream, "cannot create subtitle chain" );
return false;
}
/* open output stream */
id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
id->b_transcode = true;
if( !id->id )
{
transcode_spu_close( p_stream, id );
return false;
}
}
else
{
assert( p_sys->b_soverlay );
msg_Dbg( p_stream, "subtitle (fcc=`%4.4s') overlaying",
(char*)&p_fmt->i_codec );
id->b_transcode = true;
/* Build decoder -> filter -> overlaying chain */
if( transcode_spu_new( p_stream, id ) )
{
msg_Err( p_stream, "cannot create subtitle chain" );
return false;
}
}
return true;
}
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