modules/packetizer/dts_header.h

   1 /*****************************************************************************
   2  * dts_header.c: parse DTS audio headers info
   3  *****************************************************************************
   4  * Copyright (C) 2004-2016 VLC authors and VideoLAN
   5  *
   6  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   7  *          Laurent Aimar
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #define VLC_DTS_HEADER_SIZE 14
  25
  26 #define PROFILE_DTS_INVALID -1
  27 #define PROFILE_DTS 0
  28 #define PROFILE_DTS_HD 1
  29 #define PROFILE_DTS_EXPRESS 2
  30
  31 enum vlc_dts_syncword_e
  32 {
  33     DTS_SYNC_NONE = 0,
  34     DTS_SYNC_CORE_BE,
  35     DTS_SYNC_CORE_LE,
  36     DTS_SYNC_CORE_14BITS_BE,
  37     DTS_SYNC_CORE_14BITS_LE,
  38     DTS_SYNC_SUBSTREAM,
  39     /* Substreams internal syncs */
  40     DTS_SYNC_SUBSTREAM_LBR,
  41 };
  42
  43 typedef struct
  44 {
  45     enum vlc_dts_syncword_e syncword;
  46     unsigned int    i_rate;
  47     unsigned int    i_bitrate;
  48     unsigned int    i_frame_size;
  49     unsigned int    i_frame_length;
  50     uint32_t        i_substream_header_size;
  51     uint16_t        i_physical_channels;
  52     uint16_t        i_chan_mode;
  53 } vlc_dts_header_t;
  54
  55 int     vlc_dts_header_Parse( vlc_dts_header_t *p_header,
  56                               const void *p_buffer, size_t i_buffer);
  57
  58 bool    vlc_dts_header_IsSync( const void *p_buffer, size_t i_buffer );
  59
  60 ssize_t vlc_dts_header_Convert14b16b( void *p_dst, size_t i_dst,
  61                                       const void *p_src, size_t i_src,
  62                                       bool b_out_le );