FFmpeg
libavcodec
mlp_parse.h
Go to the documentation of this file.
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/*
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* Copyright (c) 2007 Ian Caulfield
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_MLP_PARSE_H
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#define AVCODEC_MLP_PARSE_H
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#include <stdint.h>
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#include "
libavutil/channel_layout.h
"
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#include "
get_bits.h
"
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typedef
struct
MLPHeaderInfo
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{
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int
stream_type
;
///< 0xBB for MLP, 0xBA for TrueHD
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int
header_size
;
///< Size of the major sync header, in bytes
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int
group1_bits
;
///< The bit depth of the first substream
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int
group2_bits
;
///< Bit depth of the second substream (MLP only)
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int
group1_samplerate
;
///< Sample rate of first substream
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int
group2_samplerate
;
///< Sample rate of second substream (MLP only)
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int
channel_arrangement
;
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int
channel_modifier_thd_stream0
;
///< Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")
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int
channel_modifier_thd_stream1
;
///< Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")
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int
channel_modifier_thd_stream2
;
///< Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")
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int
channels_mlp
;
///< Channel count for MLP streams
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int
channels_thd_stream1
;
///< Channel count for substream 1 of TrueHD streams ("6-channel presentation")
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int
channels_thd_stream2
;
///< Channel count for substream 2 of TrueHD streams ("8-channel presentation")
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uint64_t
channel_layout_mlp
;
///< Channel layout for MLP streams
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uint64_t
channel_layout_thd_stream1
;
///< Channel layout for substream 1 of TrueHD streams ("6-channel presentation")
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uint64_t
channel_layout_thd_stream2
;
///< Channel layout for substream 2 of TrueHD streams ("8-channel presentation")
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int
access_unit_size
;
///< Number of samples per coded frame
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int
access_unit_size_pow2
;
///< Next power of two above number of samples per frame
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int
is_vbr
;
///< Stream is VBR instead of CBR
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int
peak_bitrate
;
///< Peak bitrate for VBR, actual bitrate (==peak) for CBR
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int
num_substreams
;
///< Number of substreams within stream
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int
extended_substream_info
;
///< Which substream of substreams carry 16-channel presentation
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int
substream_info
;
///< Which substream of substreams carry 2/6/8-channel presentation
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}
MLPHeaderInfo
;
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static
const
uint8_t
thd_chancount
[13] = {
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// LR C LFE LRs LRvh LRc LRrs Cs Ts LRsd LRw Cvh LFE2
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2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 1
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};
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static
const
uint64_t
thd_layout
[13] = {
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AV_CH_FRONT_LEFT
|
AV_CH_FRONT_RIGHT
,
// LR
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AV_CH_FRONT_CENTER
,
// C
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AV_CH_LOW_FREQUENCY
,
// LFE
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AV_CH_SIDE_LEFT
|
AV_CH_SIDE_RIGHT
,
// LRs
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AV_CH_TOP_FRONT_LEFT
|
AV_CH_TOP_FRONT_RIGHT
,
// LRvh
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AV_CH_FRONT_LEFT_OF_CENTER
|
AV_CH_FRONT_RIGHT_OF_CENTER
,
// LRc
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AV_CH_BACK_LEFT
|
AV_CH_BACK_RIGHT
,
// LRrs
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AV_CH_BACK_CENTER
,
// Cs
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AV_CH_TOP_CENTER
,
// Ts
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AV_CH_SURROUND_DIRECT_LEFT
|
AV_CH_SURROUND_DIRECT_RIGHT
,
// LRsd
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AV_CH_WIDE_LEFT
|
AV_CH_WIDE_RIGHT
,
// LRw
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AV_CH_TOP_FRONT_CENTER
,
// Cvh
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AV_CH_LOW_FREQUENCY_2
,
// LFE2
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};
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static
inline
int
mlp_samplerate
(
int
in)
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{
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if
(in == 0xF)
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return
0;
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return
(in & 8 ? 44100 : 48000) << (in & 7) ;
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}
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static
inline
int
truehd_channels
(
int
chanmap)
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{
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int
channels
= 0,
i
;
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for
(
i
= 0;
i
< 13;
i
++)
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channels
+=
thd_chancount
[
i
] * ((chanmap >>
i
) & 1);
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return
channels
;
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}
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static
inline
uint64_t
truehd_layout
(
int
chanmap)
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{
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int
i
;
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uint64_t
layout
= 0;
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for
(
i
= 0;
i
< 13;
i
++)
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layout
|=
thd_layout
[
i
] * ((chanmap >>
i
) & 1);
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return
layout
;
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}
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static
inline
int
layout_truehd
(uint64_t
layout
)
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{
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int
chanmap = 0;
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for
(
int
i
= 0;
i
< 13;
i
++) {
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if
((
layout
&
thd_layout
[
i
]) ==
thd_layout
[
i
])
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chanmap |= 1 <<
i
;
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}
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return
chanmap;
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}
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int
ff_mlp_read_major_sync
(
void
*
log
,
MLPHeaderInfo
*
mh
,
GetBitContext
*gb);
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#endif
/* AVCODEC_MLP_PARSE_H */
MLPHeaderInfo::channel_arrangement
int channel_arrangement
Definition:
mlp_parse.h:41
AV_CH_TOP_FRONT_CENTER
#define AV_CH_TOP_FRONT_CENTER
Definition:
channel_layout.h:177
AV_CH_LOW_FREQUENCY_2
#define AV_CH_LOW_FREQUENCY_2
Definition:
channel_layout.h:188
MLPHeaderInfo::group1_samplerate
int group1_samplerate
Sample rate of first substream.
Definition:
mlp_parse.h:38
normalize.log
log
Definition:
normalize.py:21
AV_CH_TOP_FRONT_RIGHT
#define AV_CH_TOP_FRONT_RIGHT
Definition:
channel_layout.h:178
MLPHeaderInfo::channel_layout_thd_stream2
uint64_t channel_layout_thd_stream2
Channel layout for substream 2 of TrueHD streams ("8-channel presentation")
Definition:
mlp_parse.h:52
truehd_channels
static int truehd_channels(int chanmap)
Definition:
mlp_parse.h:95
mh
#define mh
Definition:
vf_colormatrix.c:105
AV_CH_TOP_FRONT_LEFT
#define AV_CH_TOP_FRONT_LEFT
Definition:
channel_layout.h:176
AV_CH_WIDE_LEFT
#define AV_CH_WIDE_LEFT
Definition:
channel_layout.h:184
AV_CH_SURROUND_DIRECT_RIGHT
#define AV_CH_SURROUND_DIRECT_RIGHT
Definition:
channel_layout.h:187
AV_CH_WIDE_RIGHT
#define AV_CH_WIDE_RIGHT
Definition:
channel_layout.h:185
GetBitContext
Definition:
get_bits.h:108
AV_CH_BACK_LEFT
#define AV_CH_BACK_LEFT
Definition:
channel_layout.h:168
MLPHeaderInfo::channels_thd_stream1
int channels_thd_stream1
Channel count for substream 1 of TrueHD streams ("6-channel presentation")
Definition:
mlp_parse.h:48
AV_CH_LOW_FREQUENCY
#define AV_CH_LOW_FREQUENCY
Definition:
channel_layout.h:167
MLPHeaderInfo::channels_thd_stream2
int channels_thd_stream2
Channel count for substream 2 of TrueHD streams ("8-channel presentation")
Definition:
mlp_parse.h:49
MLPHeaderInfo::access_unit_size
int access_unit_size
Number of samples per coded frame.
Definition:
mlp_parse.h:54
channels
channels
Definition:
aptx.h:31
get_bits.h
MLPHeaderInfo::channel_modifier_thd_stream0
int channel_modifier_thd_stream0
Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")
Definition:
mlp_parse.h:43
MLPHeaderInfo::stream_type
int stream_type
0xBB for MLP, 0xBA for TrueHD
Definition:
mlp_parse.h:32
MLPHeaderInfo::access_unit_size_pow2
int access_unit_size_pow2
Next power of two above number of samples per frame.
Definition:
mlp_parse.h:55
MLPHeaderInfo::peak_bitrate
int peak_bitrate
Peak bitrate for VBR, actual bitrate (==peak) for CBR.
Definition:
mlp_parse.h:58
AV_CH_TOP_CENTER
#define AV_CH_TOP_CENTER
Definition:
channel_layout.h:175
truehd_layout
static uint64_t truehd_layout(int chanmap)
Definition:
mlp_parse.h:105
AV_CH_FRONT_CENTER
#define AV_CH_FRONT_CENTER
Definition:
channel_layout.h:166
AV_CH_FRONT_LEFT_OF_CENTER
#define AV_CH_FRONT_LEFT_OF_CENTER
Definition:
channel_layout.h:170
layout_truehd
static int layout_truehd(uint64_t layout)
Definition:
mlp_parse.h:116
MLPHeaderInfo::channels_mlp
int channels_mlp
Channel count for MLP streams.
Definition:
mlp_parse.h:47
MLPHeaderInfo::channel_layout_thd_stream1
uint64_t channel_layout_thd_stream1
Channel layout for substream 1 of TrueHD streams ("6-channel presentation")
Definition:
mlp_parse.h:51
MLPHeaderInfo::group2_bits
int group2_bits
Bit depth of the second substream (MLP only)
Definition:
mlp_parse.h:36
AV_CH_FRONT_RIGHT_OF_CENTER
#define AV_CH_FRONT_RIGHT_OF_CENTER
Definition:
channel_layout.h:171
MLPHeaderInfo::extended_substream_info
int extended_substream_info
Which substream of substreams carry 16-channel presentation.
Definition:
mlp_parse.h:62
MLPHeaderInfo::header_size
int header_size
Size of the major sync header, in bytes.
Definition:
mlp_parse.h:33
MLPHeaderInfo::group1_bits
int group1_bits
The bit depth of the first substream.
Definition:
mlp_parse.h:35
layout
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel layout
Definition:
filter_design.txt:18
ff_mlp_read_major_sync
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:86
i
#define i(width, name, range_min, range_max)
Definition:
cbs_h2645.c:255
AV_CH_BACK_CENTER
#define AV_CH_BACK_CENTER
Definition:
channel_layout.h:172
MLPHeaderInfo
Definition:
mlp_parse.h:30
AV_CH_FRONT_LEFT
#define AV_CH_FRONT_LEFT
Definition:
channel_layout.h:164
AV_CH_SIDE_RIGHT
#define AV_CH_SIDE_RIGHT
Definition:
channel_layout.h:174
MLPHeaderInfo::substream_info
int substream_info
Which substream of substreams carry 2/6/8-channel presentation.
Definition:
mlp_parse.h:63
thd_layout
static const uint64_t thd_layout[13]
Definition:
mlp_parse.h:71
MLPHeaderInfo::is_vbr
int is_vbr
Stream is VBR instead of CBR.
Definition:
mlp_parse.h:57
MLPHeaderInfo::channel_modifier_thd_stream2
int channel_modifier_thd_stream2
Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")
Definition:
mlp_parse.h:45
mlp_samplerate
static int mlp_samplerate(int in)
Definition:
mlp_parse.h:87
channel_layout.h
MLPHeaderInfo::channel_modifier_thd_stream1
int channel_modifier_thd_stream1
Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")
Definition:
mlp_parse.h:44
MLPHeaderInfo::group2_samplerate
int group2_samplerate
Sample rate of second substream (MLP only)
Definition:
mlp_parse.h:39
AV_CH_SURROUND_DIRECT_LEFT
#define AV_CH_SURROUND_DIRECT_LEFT
Definition:
channel_layout.h:186
MLPHeaderInfo::num_substreams
int num_substreams
Number of substreams within stream.
Definition:
mlp_parse.h:60
MLPHeaderInfo::channel_layout_mlp
uint64_t channel_layout_mlp
Channel layout for MLP streams.
Definition:
mlp_parse.h:50
AV_CH_FRONT_RIGHT
#define AV_CH_FRONT_RIGHT
Definition:
channel_layout.h:165
AV_CH_BACK_RIGHT
#define AV_CH_BACK_RIGHT
Definition:
channel_layout.h:169
AV_CH_SIDE_LEFT
#define AV_CH_SIDE_LEFT
Definition:
channel_layout.h:173
thd_chancount
static const uint8_t thd_chancount[13]
Definition:
mlp_parse.h:66
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