libavcodec/mlp_parser.h

   1 /*
   2  * MLP parser prototypes
   3  * Copyright (c) 2007 Ian Caulfield
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file mlp_parser.h
  24  * MLP parser prototypes
  25  */
  26
  27 #ifndef FFMPEG_MLP_PARSER_H
  28 #define FFMPEG_MLP_PARSER_H
  29
  30 #include <inttypes.h>
  31
  32 typedef struct MLPHeaderInfo
  33 {
  34     int stream_type;            ///< 0xBB for MLP, 0xBA for TrueHD
  35
  36     int group1_bits;            ///< The bit depth of the first substream
  37     int group2_bits;            ///< Bit depth of the second substream (MLP only)
  38
  39     int group1_samplerate;      ///< Sample rate of first substream
  40     int group2_samplerate;      ///< Sample rate of second substream (MLP only)
  41
  42     int channels_mlp;           ///< Channel arrangement for MLP streams
  43     int channels_thd_stream1;   ///< Channel arrangement for substream 1 of TrueHD streams (5.1)
  44     int channels_thd_stream2;   ///< Channel arrangement for substream 2 of TrueHD streams (7.1)
  45
  46     int access_unit_size;       ///< Number of samples per coded frame
  47     int access_unit_size_pow2;  ///< Next power of two above number of samples per frame
  48
  49     int is_vbr;                 ///< Stream is VBR instead of CBR
  50     int peak_bitrate;           ///< Peak bitrate for VBR, actual bitrate (==peak) for CBR
  51
  52     int num_substreams;         ///< Number of substreams within stream
  53 } MLPHeaderInfo;
  54
  55
  56 int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, const uint8_t *buf,
  57                            unsigned int buf_size);
  58
  59 #endif /* FFMPEG_MLP_PARSER_H */
  60