modules/stream_out/transcode/osd.c

   1 /*****************************************************************************
   2  * osd.c: transcoding stream output module (osd)
   3  *****************************************************************************
   4  * Copyright (C) 2003-2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   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>
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU Lesser General Public License as published by
  14  * the Free Software Foundation; either version 2.1 of the License, or
  15  * (at your option) any later version.
  16  *
  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 Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * along with this program; if not, write to the Free Software Foundation,
  24  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30
  31 #include "transcode.h"
  32
  33 #include <vlc_spu.h>
  34 #include <vlc_modules.h>
  35
  36 /*
  37  * OSD menu
  38  */
  39 int transcode_osd_new( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
  40 {
  41     sout_stream_sys_t *p_sys = p_stream->p_sys;
  42
  43     id->p_decoder->fmt_in.i_cat = SPU_ES;
  44     id->p_encoder->fmt_out.psz_language = strdup( "osd" );
  45
  46     if( p_sys->i_osdcodec != 0 || p_sys->psz_osdenc )
  47     {
  48         msg_Dbg( p_stream, "creating osdmenu transcoding from fcc=`%4.4s' "
  49                  "to fcc=`%4.4s'", (char*)&id->p_encoder->fmt_out.i_codec,
  50                  (char*)&p_sys->i_osdcodec );
  51
  52         /* Complete destination format */
  53         id->p_encoder->fmt_out.i_codec = p_sys->i_osdcodec;
  54
  55         /* Open encoder */
  56         es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
  57                         VLC_CODEC_YUVA );
  58         id->p_encoder->fmt_in.psz_language = strdup( "osd" );
  59
  60         id->p_encoder->p_cfg = p_sys->p_osd_cfg;
  61
  62         id->p_encoder->p_module =
  63             module_need( id->p_encoder, "encoder", p_sys->psz_osdenc, true );
  64
  65         if( !id->p_encoder->p_module )
  66         {
  67             msg_Err( p_stream, "cannot find spu encoder (%s)", p_sys->psz_osdenc );
  68             goto error;
  69         }
  70
  71         /* open output stream */
  72         id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_encoder->fmt_out );
  73         id->b_transcode = true;
  74
  75         if( !id->id ) goto error;
  76     }
  77     else
  78     {
  79         msg_Dbg( p_stream, "not transcoding a stream (fcc=`%4.4s')",
  80                  (char*)&id->p_decoder->fmt_out.i_codec );
  81         id->id = sout_StreamIdAdd( p_stream->p_next, &id->p_decoder->fmt_out );
  82         id->b_transcode = false;
  83
  84         if( !id->id ) goto error;
  85     }
  86
  87     if( !p_sys->p_spu )
  88         p_sys->p_spu = spu_Create( p_stream );
  89
  90     return VLC_SUCCESS;
  91
  92  error:
  93     msg_Err( p_stream, "starting osd encoding thread failed" );
  94     if( id->p_encoder->p_module )
  95             module_unneed( id->p_encoder, id->p_encoder->p_module );
  96     p_sys->b_osd = false;
  97     return VLC_EGENERIC;
  98 }
  99
 100 void transcode_osd_close( sout_stream_t *p_stream, sout_stream_id_sys_t *id)
 101 {
 102     sout_stream_sys_t *p_sys = p_stream->p_sys;
 103
 104     /* Close encoder */
 105     if( id )
 106     {
 107         if( id->p_encoder->p_module )
 108             module_unneed( id->p_encoder, id->p_encoder->p_module );
 109     }
 110     p_sys->b_osd = false;
 111 }
 112
 113 int transcode_osd_process( sout_stream_t *p_stream, sout_stream_id_sys_t *id,
 114                                   block_t *in, block_t **out )
 115 {
 116     sout_stream_sys_t *p_sys = p_stream->p_sys;
 117     subpicture_t *p_subpic = NULL;
 118
 119     /* Check if we have a subpicture to send */
 120     if( p_sys->p_spu && in->i_dts > VLC_TS_INVALID )
 121     {
 122         video_format_t fmt;
 123         video_format_Init( &fmt, 0 );
 124         video_format_Setup( &fmt, 0, 720, 576, 720, 576, 1, 1 );
 125         p_subpic = spu_Render( p_sys->p_spu, NULL, &fmt, &fmt, in->i_dts, in->i_dts, false );
 126     }
 127     else
 128     {
 129         msg_Warn( p_stream, "spu channel not initialized, doing it now" );
 130         if( !p_sys->p_spu )
 131             p_sys->p_spu = spu_Create( p_stream );
 132     }
 133
 134     if( p_subpic )
 135     {
 136         block_t *p_block = NULL;
 137
 138         if( p_sys->b_master_sync && p_sys->i_master_drift )
 139         {
 140             p_subpic->i_start -= p_sys->i_master_drift;
 141             if( p_subpic->i_stop ) p_subpic->i_stop -= p_sys->i_master_drift;
 142         }
 143
 144         p_block = id->p_encoder->pf_encode_sub( id->p_encoder, p_subpic );
 145         subpicture_Delete( p_subpic );
 146         if( p_block )
 147         {
 148             p_block->i_dts = p_block->i_pts = in->i_dts;
 149             block_ChainAppend( out, p_block );
 150             return VLC_SUCCESS;
 151         }
 152     }
 153     return VLC_EGENERIC;
 154 }
 155
 156 bool transcode_osd_add( sout_stream_t *p_stream, es_format_t *p_fmt,
 157                                 sout_stream_id_sys_t *id)
 158 {
 159     sout_stream_sys_t *p_sys = p_stream->p_sys;
 160
 161     msg_Dbg( p_stream, "creating osd transcoding from fcc=`%4.4s' "
 162              "to fcc=`%4.4s'", (char*)&p_fmt->i_codec,
 163              (char*)&p_sys->i_scodec );
 164
 165     id->b_transcode = true;
 166
 167     /* Create a fake OSD menu elementary stream */
 168     if( transcode_osd_new( p_stream, id ) )
 169     {
 170         msg_Err( p_stream, "cannot create osd chain" );
 171         return false;
 172     }
 173     p_sys->b_osd = true;
 174
 175     return true;
 176 }