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
24 * MLP parser prototypes
25 */
26
27#ifndef AVCODEC_MLP_PARSER_H
28#define AVCODEC_MLP_PARSER_H
29
30#include "get_bits.h"
31
32typedef 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
56int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb);
57
58#endif /* AVCODEC_MLP_PARSER_H */
59
60