modules/codec/spdif.c

   1 /*****************************************************************************
   2  * spdif.c: S/PDIF pass-though decoder
   3  *****************************************************************************
   4  * Copyright (C) 2016 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <vlc_common.h>
  26 #include <vlc_plugin.h>
  27 #include <vlc_aout.h>
  28 #include <vlc_codec.h>
  29 #include <vlc_modules.h>
  30
  31 static int OpenDecoder(vlc_object_t *);
  32
  33 vlc_module_begin()
  34     set_category(CAT_INPUT)
  35     set_subcategory(SUBCAT_INPUT_ACODEC)
  36     set_description(N_("S/PDIF pass-through decoder"))
  37     set_capability("audio decoder", 120)
  38     set_callbacks(OpenDecoder, NULL)
  39 vlc_module_end()
  40
  41 static int
  42 DecodeBlock(decoder_t *p_dec, block_t *p_block)
  43 {
  44     if (p_block != NULL)
  45         decoder_QueueAudio( p_dec, p_block );
  46     return VLCDEC_SUCCESS;
  47 }
  48
  49 static int
  50 OpenDecoder(vlc_object_t *p_this)
  51 {
  52     decoder_t *p_dec = (decoder_t*)p_this;
  53
  54     switch (p_dec->fmt_in.i_codec)
  55     {
  56     case VLC_CODEC_MPGA:
  57     case VLC_CODEC_MP3:
  58         /* Disabled by default */
  59         if (!p_dec->obj.force)
  60             return VLC_EGENERIC;
  61         break;
  62     case VLC_CODEC_A52:
  63     case VLC_CODEC_EAC3:
  64     case VLC_CODEC_MLP:
  65     case VLC_CODEC_TRUEHD:
  66     case VLC_CODEC_DTS:
  67     case VLC_CODEC_SPDIFL:
  68     case VLC_CODEC_SPDIFB:
  69         /* Enabled by default */
  70         break;
  71     default:
  72         return VLC_EGENERIC;
  73     }
  74
  75     /* Set output properties */
  76     p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
  77     p_dec->fmt_out.audio = p_dec->fmt_in.audio;
  78     p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
  79
  80     if (decoder_UpdateAudioFormat(p_dec))
  81         return VLC_EGENERIC;
  82
  83     p_dec->pf_decode = DecodeBlock;
  84     p_dec->pf_flush  = NULL;
  85
  86     return VLC_SUCCESS;
  87 }