FFmpeg
mpeg4audio.h
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1 /*
2  * MPEG-4 Audio common header
3  * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
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 #ifndef AVCODEC_MPEG4AUDIO_H
23 #define AVCODEC_MPEG4AUDIO_H
24 
25 #include <stdint.h>
26 
27 #include "get_bits.h"
28 
29 typedef struct MPEG4AudioConfig {
34  int sbr; ///< -1 implicit, 1 presence
39  int channels;
40  int ps; ///< -1 implicit, 1 presence
43 
44 extern const int ff_mpeg4audio_sample_rates[16];
45 extern const uint8_t ff_mpeg4audio_channels[15];
46 
47 /**
48  * Parse MPEG-4 systems extradata from a potentially unaligned GetBitContext to retrieve audio configuration.
49  * @param[in] c MPEG4AudioConfig structure to fill.
50  * @param[in] gb Extradata from container.
51  * @param[in] sync_extension look for a sync extension after config if true.
52  * @param[in] logctx opaque struct starting with an AVClass element, used for logging.
53  * @return negative AVERROR code on error, on success AudioSpecificConfig bit index in extradata.
54  */
56  int sync_extension, void *logctx);
57 
58 /**
59  * Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration.
60  * @param[in] c MPEG4AudioConfig structure to fill.
61  * @param[in] buf Extradata from container.
62  * @param[in] size Extradata size in bytes.
63  * @param[in] sync_extension look for a sync extension after config if true.
64  * @param[in] logctx opaque struct starting with an AVClass element, used for logging.
65  * @return negative AVERROR code on error, AudioSpecificConfig bit index in extradata on success.
66  */
67 int avpriv_mpeg4audio_get_config2(MPEG4AudioConfig *c, const uint8_t *buf,
68  int size, int sync_extension, void *logctx);
69 
72  // Support? Name
73  AOT_AAC_MAIN, ///< Y Main
74  AOT_AAC_LC, ///< Y Low Complexity
75  AOT_AAC_SSR, ///< N (code in SoC repo) Scalable Sample Rate
76  AOT_AAC_LTP, ///< Y Long Term Prediction
77  AOT_SBR, ///< Y Spectral Band Replication
78  AOT_AAC_SCALABLE, ///< N Scalable
79  AOT_TWINVQ, ///< N Twin Vector Quantizer
80  AOT_CELP, ///< N Code Excited Linear Prediction
81  AOT_HVXC, ///< N Harmonic Vector eXcitation Coding
82  AOT_TTSI = 12, ///< N Text-To-Speech Interface
83  AOT_MAINSYNTH, ///< N Main Synthesis
84  AOT_WAVESYNTH, ///< N Wavetable Synthesis
85  AOT_MIDI, ///< N General MIDI
86  AOT_SAFX, ///< N Algorithmic Synthesis and Audio Effects
87  AOT_ER_AAC_LC, ///< N Error Resilient Low Complexity
88  AOT_ER_AAC_LTP = 19, ///< N Error Resilient Long Term Prediction
89  AOT_ER_AAC_SCALABLE, ///< N Error Resilient Scalable
90  AOT_ER_TWINVQ, ///< N Error Resilient Twin Vector Quantizer
91  AOT_ER_BSAC, ///< N Error Resilient Bit-Sliced Arithmetic Coding
92  AOT_ER_AAC_LD, ///< N Error Resilient Low Delay
93  AOT_ER_CELP, ///< N Error Resilient Code Excited Linear Prediction
94  AOT_ER_HVXC, ///< N Error Resilient Harmonic Vector eXcitation Coding
95  AOT_ER_HILN, ///< N Error Resilient Harmonic and Individual Lines plus Noise
96  AOT_ER_PARAM, ///< N Error Resilient Parametric
97  AOT_SSC, ///< N SinuSoidal Coding
98  AOT_PS, ///< N Parametric Stereo
99  AOT_SURROUND, ///< N MPEG Surround
100  AOT_ESCAPE, ///< Y Escape Value
101  AOT_L1, ///< Y Layer 1
102  AOT_L2, ///< Y Layer 2
103  AOT_L3, ///< Y Layer 3
104  AOT_DST, ///< N Direct Stream Transfer
105  AOT_ALS, ///< Y Audio LosslesS
106  AOT_SLS, ///< N Scalable LosslesS
107  AOT_SLS_NON_CORE, ///< N Scalable LosslesS (non core)
108  AOT_ER_AAC_ELD, ///< N Error Resilient Enhanced Low Delay
109  AOT_SMR_SIMPLE, ///< N Symbolic Music Representation Simple
110  AOT_SMR_MAIN, ///< N Symbolic Music Representation Main
111  AOT_USAC_NOSBR, ///< N Unified Speech and Audio Coding (no SBR)
112  AOT_SAOC, ///< N Spatial Audio Object Coding
113  AOT_LD_SURROUND, ///< N Low Delay MPEG Surround
114  AOT_USAC, ///< N Unified Speech and Audio Coding
115 };
116 
117 #define MAX_PCE_SIZE 320 ///<Maximum size of a PCE including the 3-bit ID_PCE
118  ///<marker and the comment
119 
120 #endif /* AVCODEC_MPEG4AUDIO_H */
AOT_PS
@ AOT_PS
N Parametric Stereo.
Definition: mpeg4audio.h:98
AOT_L1
@ AOT_L1
Y Layer 1.
Definition: mpeg4audio.h:101
AOT_ER_AAC_LTP
@ AOT_ER_AAC_LTP
N Error Resilient Long Term Prediction.
Definition: mpeg4audio.h:88
AOT_SLS_NON_CORE
@ AOT_SLS_NON_CORE
N Scalable LosslesS (non core)
Definition: mpeg4audio.h:107
AOT_SAFX
@ AOT_SAFX
N Algorithmic Synthesis and Audio Effects.
Definition: mpeg4audio.h:86
AOT_SURROUND
@ AOT_SURROUND
N MPEG Surround.
Definition: mpeg4audio.h:99
MPEG4AudioConfig
Definition: mpeg4audio.h:29
AOT_CELP
@ AOT_CELP
N Code Excited Linear Prediction.
Definition: mpeg4audio.h:80
AOT_ER_PARAM
@ AOT_ER_PARAM
N Error Resilient Parametric.
Definition: mpeg4audio.h:96
AOT_ESCAPE
@ AOT_ESCAPE
Y Escape Value.
Definition: mpeg4audio.h:100
GetBitContext
Definition: get_bits.h:61
AOT_USAC_NOSBR
@ AOT_USAC_NOSBR
N Unified Speech and Audio Coding (no SBR)
Definition: mpeg4audio.h:111
AOT_SMR_MAIN
@ AOT_SMR_MAIN
N Symbolic Music Representation Main.
Definition: mpeg4audio.h:110
avpriv_mpeg4audio_get_config2
int avpriv_mpeg4audio_get_config2(MPEG4AudioConfig *c, const uint8_t *buf, int size, int sync_extension, void *logctx)
Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration.
Definition: mpeg4audio.c:165
AOT_ER_AAC_LC
@ AOT_ER_AAC_LC
N Error Resilient Low Complexity.
Definition: mpeg4audio.h:87
AudioObjectType
AudioObjectType
Definition: mpeg4audio.h:70
AOT_ER_AAC_LD
@ AOT_ER_AAC_LD
N Error Resilient Low Delay.
Definition: mpeg4audio.h:92
AOT_SLS
@ AOT_SLS
N Scalable LosslesS.
Definition: mpeg4audio.h:106
AOT_MIDI
@ AOT_MIDI
N General MIDI.
Definition: mpeg4audio.h:85
AOT_ER_HILN
@ AOT_ER_HILN
N Error Resilient Harmonic and Individual Lines plus Noise.
Definition: mpeg4audio.h:95
get_bits.h
MPEG4AudioConfig::ext_chan_config
int ext_chan_config
Definition: mpeg4audio.h:38
AOT_TTSI
@ AOT_TTSI
N Text-To-Speech Interface.
Definition: mpeg4audio.h:82
AOT_ER_TWINVQ
@ AOT_ER_TWINVQ
N Error Resilient Twin Vector Quantizer.
Definition: mpeg4audio.h:90
MPEG4AudioConfig::sampling_index
int sampling_index
Definition: mpeg4audio.h:31
AOT_USAC
@ AOT_USAC
N Unified Speech and Audio Coding.
Definition: mpeg4audio.h:114
AOT_MAINSYNTH
@ AOT_MAINSYNTH
N Main Synthesis.
Definition: mpeg4audio.h:83
AOT_AAC_MAIN
@ AOT_AAC_MAIN
Y Main.
Definition: mpeg4audio.h:73
AOT_LD_SURROUND
@ AOT_LD_SURROUND
N Low Delay MPEG Surround.
Definition: mpeg4audio.h:113
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AOT_HVXC
@ AOT_HVXC
N Harmonic Vector eXcitation Coding.
Definition: mpeg4audio.h:81
AOT_ER_AAC_SCALABLE
@ AOT_ER_AAC_SCALABLE
N Error Resilient Scalable.
Definition: mpeg4audio.h:89
AOT_AAC_SCALABLE
@ AOT_AAC_SCALABLE
N Scalable.
Definition: mpeg4audio.h:78
AOT_DST
@ AOT_DST
N Direct Stream Transfer.
Definition: mpeg4audio.h:104
AOT_L2
@ AOT_L2
Y Layer 2.
Definition: mpeg4audio.h:102
AOT_WAVESYNTH
@ AOT_WAVESYNTH
N Wavetable Synthesis.
Definition: mpeg4audio.h:84
size
int size
Definition: twinvq_data.h:10344
AOT_ER_CELP
@ AOT_ER_CELP
N Error Resilient Code Excited Linear Prediction.
Definition: mpeg4audio.h:93
AOT_ER_HVXC
@ AOT_ER_HVXC
N Error Resilient Harmonic Vector eXcitation Coding.
Definition: mpeg4audio.h:94
MPEG4AudioConfig::ext_object_type
int ext_object_type
Definition: mpeg4audio.h:35
MPEG4AudioConfig::channels
int channels
Definition: mpeg4audio.h:39
ff_mpeg4audio_get_config_gb
int ff_mpeg4audio_get_config_gb(MPEG4AudioConfig *c, GetBitContext *gb, int sync_extension, void *logctx)
Parse MPEG-4 systems extradata from a potentially unaligned GetBitContext to retrieve audio configura...
Definition: mpeg4audio.c:92
AOT_AAC_SSR
@ AOT_AAC_SSR
N (code in SoC repo) Scalable Sample Rate.
Definition: mpeg4audio.h:75
AOT_ER_AAC_ELD
@ AOT_ER_AAC_ELD
N Error Resilient Enhanced Low Delay.
Definition: mpeg4audio.h:108
MPEG4AudioConfig::chan_config
int chan_config
Definition: mpeg4audio.h:33
AOT_NULL
@ AOT_NULL
Definition: mpeg4audio.h:71
MPEG4AudioConfig::ext_sample_rate
int ext_sample_rate
Definition: mpeg4audio.h:37
AOT_ER_BSAC
@ AOT_ER_BSAC
N Error Resilient Bit-Sliced Arithmetic Coding.
Definition: mpeg4audio.h:91
MPEG4AudioConfig::object_type
int object_type
Definition: mpeg4audio.h:30
MPEG4AudioConfig::ext_sampling_index
int ext_sampling_index
Definition: mpeg4audio.h:36
MPEG4AudioConfig::ps
int ps
-1 implicit, 1 presence
Definition: mpeg4audio.h:40
AOT_TWINVQ
@ AOT_TWINVQ
N Twin Vector Quantizer.
Definition: mpeg4audio.h:79
AOT_SBR
@ AOT_SBR
Y Spectral Band Replication.
Definition: mpeg4audio.h:77
AOT_SSC
@ AOT_SSC
N SinuSoidal Coding.
Definition: mpeg4audio.h:97
MPEG4AudioConfig::sbr
int sbr
-1 implicit, 1 presence
Definition: mpeg4audio.h:34
ff_mpeg4audio_sample_rates
const int ff_mpeg4audio_sample_rates[16]
Definition: mpeg4audio_sample_rates.h:26
MPEG4AudioConfig::frame_length_short
int frame_length_short
Definition: mpeg4audio.h:41
AOT_ALS
@ AOT_ALS
Y Audio LosslesS.
Definition: mpeg4audio.h:105
AOT_L3
@ AOT_L3
Y Layer 3.
Definition: mpeg4audio.h:103
ff_mpeg4audio_channels
const uint8_t ff_mpeg4audio_channels[15]
Definition: mpeg4audio.c:59
AOT_AAC_LC
@ AOT_AAC_LC
Y Low Complexity.
Definition: mpeg4audio.h:74
AOT_AAC_LTP
@ AOT_AAC_LTP
Y Long Term Prediction.
Definition: mpeg4audio.h:76
AOT_SAOC
@ AOT_SAOC
N Spatial Audio Object Coding.
Definition: mpeg4audio.h:112
AOT_SMR_SIMPLE
@ AOT_SMR_SIMPLE
N Symbolic Music Representation Simple.
Definition: mpeg4audio.h:109
MPEG4AudioConfig::sample_rate
int sample_rate
Definition: mpeg4audio.h:32