FFmpeg
mlp_parse.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2007 Ian Caulfield
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg 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 GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVCODEC_MLP_PARSE_H
22 #define AVCODEC_MLP_PARSE_H
23 
24 #include "get_bits.h"
25 
26 typedef struct MLPHeaderInfo
27 {
28  int stream_type; ///< 0xBB for MLP, 0xBA for TrueHD
29  int header_size; ///< Size of the major sync header, in bytes
30 
31  int group1_bits; ///< The bit depth of the first substream
32  int group2_bits; ///< Bit depth of the second substream (MLP only)
33 
34  int group1_samplerate; ///< Sample rate of first substream
35  int group2_samplerate; ///< Sample rate of second substream (MLP only)
36 
38 
39  int channel_modifier_thd_stream0; ///< Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")
40  int channel_modifier_thd_stream1; ///< Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")
41  int channel_modifier_thd_stream2; ///< Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")
42 
43  int channels_mlp; ///< Channel count for MLP streams
44  int channels_thd_stream1; ///< Channel count for substream 1 of TrueHD streams ("6-channel presentation")
45  int channels_thd_stream2; ///< Channel count for substream 2 of TrueHD streams ("8-channel presentation")
46  uint64_t channel_layout_mlp; ///< Channel layout for MLP streams
47  uint64_t channel_layout_thd_stream1; ///< Channel layout for substream 1 of TrueHD streams ("6-channel presentation")
48  uint64_t channel_layout_thd_stream2; ///< Channel layout for substream 2 of TrueHD streams ("8-channel presentation")
49 
50  int access_unit_size; ///< Number of samples per coded frame
51  int access_unit_size_pow2; ///< Next power of two above number of samples per frame
52 
53  int is_vbr; ///< Stream is VBR instead of CBR
54  int peak_bitrate; ///< Peak bitrate for VBR, actual bitrate (==peak) for CBR
55 
56  int num_substreams; ///< Number of substreams within stream
58 
59 
61 
62 #endif /* AVCODEC_MLP_PARSE_H */
int channels_thd_stream1
Channel count for substream 1 of TrueHD streams ("6-channel presentation")
Definition: mlp_parse.h:44
int num_substreams
Number of substreams within stream.
Definition: mlp_parse.h:56
uint64_t channel_layout_mlp
Channel layout for MLP streams.
Definition: mlp_parse.h:46
int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb)
Read a major sync info header - contains high level information about the stream - sample rate...
Definition: mlp_parse.c:136
int access_unit_size
Number of samples per coded frame.
Definition: mlp_parse.h:50
int peak_bitrate
Peak bitrate for VBR, actual bitrate (==peak) for CBR.
Definition: mlp_parse.h:54
int channel_modifier_thd_stream0
Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")
Definition: mlp_parse.h:39
bitstream reader API header.
int channel_arrangement
Definition: mlp_parse.h:37
int channel_modifier_thd_stream2
Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")
Definition: mlp_parse.h:41
int channels_mlp
Channel count for MLP streams.
Definition: mlp_parse.h:43
int is_vbr
Stream is VBR instead of CBR.
Definition: mlp_parse.h:53
int stream_type
0xBB for MLP, 0xBA for TrueHD
Definition: mlp_parse.h:28
int access_unit_size_pow2
Next power of two above number of samples per frame.
Definition: mlp_parse.h:51
int channel_modifier_thd_stream1
Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")
Definition: mlp_parse.h:40
int group2_bits
Bit depth of the second substream (MLP only)
Definition: mlp_parse.h:32
int channels_thd_stream2
Channel count for substream 2 of TrueHD streams ("8-channel presentation")
Definition: mlp_parse.h:45
uint64_t channel_layout_thd_stream1
Channel layout for substream 1 of TrueHD streams ("6-channel presentation")
Definition: mlp_parse.h:47
uint64_t channel_layout_thd_stream2
Channel layout for substream 2 of TrueHD streams ("8-channel presentation")
Definition: mlp_parse.h:48
int header_size
Size of the major sync header, in bytes.
Definition: mlp_parse.h:29
int group1_bits
The bit depth of the first substream.
Definition: mlp_parse.h:31
int group1_samplerate
Sample rate of first substream.
Definition: mlp_parse.h:34
int group2_samplerate
Sample rate of second substream (MLP only)
Definition: mlp_parse.h:35
#define mh