1 /*****************************************************************************
2 * spu.c: transcoding stream output module (spu)
3 *****************************************************************************
4 * Copyright (C) 2003-2009 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
9 * Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
10 * Antoine Cellerier <dionoea at videolan dot org>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
31 #include "transcode.h"
37 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
40 return subpicture_New();
43 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
46 subpicture_Delete( p_subpic );
48 int transcode_spu_new( sout_stream_t *p_stream, sout_stream_id_t *id )
50 sout_stream_sys_t *p_sys = p_stream->p_sys;
56 /* Initialization of decoder structures */
57 id->p_decoder->pf_decode_sub = NULL;
58 id->p_decoder->pf_spu_buffer_new = spu_new_buffer;
59 id->p_decoder->pf_spu_buffer_del = spu_del_buffer;
60 id->p_decoder->p_owner = (decoder_owner_sys_t *)p_stream;
61 /* id->p_decoder->p_cfg = p_sys->p_spu_cfg; */
63 id->p_decoder->p_module =
64 module_need( id->p_decoder, "decoder", "$codec", false );
66 if( !id->p_decoder->p_module )
68 msg_Err( p_stream, "cannot find spu decoder" );
72 if( !p_sys->b_soverlay )
75 /* Initialization of encoder format structures */
76 es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
77 id->p_decoder->fmt_in.i_codec );
79 id->p_encoder->p_cfg = p_sys->p_spu_cfg;
81 id->p_encoder->p_module =
82 module_need( id->p_encoder, "encoder", p_sys->psz_senc, true );
84 if( !id->p_encoder->p_module )
86 module_unneed( id->p_decoder, id->p_decoder->p_module );
87 msg_Err( p_stream, "cannot find spu encoder (%s)", p_sys->psz_senc );
94 p_sys->p_spu = spu_Create( p_stream );
95 spu_Init( p_sys->p_spu );
101 void transcode_spu_close( sout_stream_id_t *id)
104 if( id->p_decoder->p_module )
105 module_unneed( id->p_decoder, id->p_decoder->p_module );
106 if( id->p_decoder->p_description )
107 vlc_meta_Delete( id->p_decoder->p_description );
110 if( id->p_encoder->p_module )
111 module_unneed( id->p_encoder, id->p_encoder->p_module );
114 int transcode_spu_process( sout_stream_t *p_stream,
115 sout_stream_id_t *id,
116 block_t *in, block_t **out )
118 sout_stream_sys_t *p_sys = p_stream->p_sys;
119 subpicture_t *p_subpic;
122 p_subpic = id->p_decoder->pf_decode_sub( id->p_decoder, &in );
126 sout_UpdateStatistic( p_stream->p_sout, SOUT_STATISTIC_DECODED_SUBTITLE, 1 );
128 if( p_sys->b_master_sync && p_sys->i_master_drift )
130 p_subpic->i_start -= p_sys->i_master_drift;
131 if( p_subpic->i_stop ) p_subpic->i_stop -= p_sys->i_master_drift;
134 if( p_sys->b_soverlay )
136 spu_DisplaySubpicture( p_sys->p_spu, p_subpic );
142 p_block = id->p_encoder->pf_encode_sub( id->p_encoder, p_subpic );
143 spu_del_buffer( id->p_decoder, p_subpic );
146 block_ChainAppend( out, p_block );
154 bool transcode_spu_add( sout_stream_t *p_stream, es_format_t *p_fmt,
155 sout_stream_id_t *id )
157 sout_stream_sys_t *p_sys = p_stream->p_sys;
159 if( p_sys->i_scodec || p_sys->psz_senc )
161 msg_Dbg( p_stream, "creating subtitles transcoding from fcc=`%4.4s' "
162 "to fcc=`%4.4s'", (char*)&p_fmt->i_codec,
163 (char*)&p_sys->i_scodec );
165 /* Complete destination format */
166 id->p_encoder->fmt_out.i_codec = p_sys->i_scodec;
168 /* build decoder -> filter -> encoder */
169 if( transcode_spu_new( p_stream, id ) )
171 msg_Err( p_stream, "cannot create subtitles chain" );
175 /* open output stream */
176 id->id = sout_StreamIdAdd( p_sys->p_out, &id->p_encoder->fmt_out );
177 id->b_transcode = true;
181 transcode_spu_close( id );
187 assert( p_sys->b_soverlay );
188 msg_Dbg( p_stream, "subtitles (fcc=`%4.4s') overlaying",
189 (char*)&p_fmt->i_codec );
191 id->b_transcode = true;
193 /* Build decoder -> filter -> overlaying chain */
194 if( transcode_spu_new( p_stream, id ) )
196 msg_Err( p_stream, "cannot create subtitles chain" );