2 * MPEG-4 Audio common header
3 * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef AVCODEC_MPEG4AUDIO_H
23 #define AVCODEC_MPEG4AUDIO_H
29 typedef struct MPEG4AudioConfig
{
34 int sbr
; ///< -1 implicit, 1 presence
36 int ext_sampling_index
;
40 int ps
; ///< -1 implicit, 1 presence
43 extern av_export
const int avpriv_mpeg4audio_sample_rates
[16];
44 extern const uint8_t ff_mpeg4audio_channels
[8];
47 * Parse MPEG-4 systems extradata to retrieve audio configuration.
48 * @param[in] c MPEG4AudioConfig structure to fill.
49 * @param[in] buf Extradata from container.
50 * @param[in] bit_size Extradata size in bits.
51 * @param[in] sync_extension look for a sync extension after config if true.
52 * @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
54 int avpriv_mpeg4audio_get_config(MPEG4AudioConfig
*c
, const uint8_t *buf
,
55 int bit_size
, int sync_extension
);
57 enum AudioObjectType
{
60 AOT_AAC_MAIN
, ///< Y Main
61 AOT_AAC_LC
, ///< Y Low Complexity
62 AOT_AAC_SSR
, ///< N (code in SoC repo) Scalable Sample Rate
63 AOT_AAC_LTP
, ///< Y Long Term Prediction
64 AOT_SBR
, ///< Y Spectral Band Replication
65 AOT_AAC_SCALABLE
, ///< N Scalable
66 AOT_TWINVQ
, ///< N Twin Vector Quantizer
67 AOT_CELP
, ///< N Code Excited Linear Prediction
68 AOT_HVXC
, ///< N Harmonic Vector eXcitation Coding
69 AOT_TTSI
= 12, ///< N Text-To-Speech Interface
70 AOT_MAINSYNTH
, ///< N Main Synthesis
71 AOT_WAVESYNTH
, ///< N Wavetable Synthesis
72 AOT_MIDI
, ///< N General MIDI
73 AOT_SAFX
, ///< N Algorithmic Synthesis and Audio Effects
74 AOT_ER_AAC_LC
, ///< N Error Resilient Low Complexity
75 AOT_ER_AAC_LTP
= 19, ///< N Error Resilient Long Term Prediction
76 AOT_ER_AAC_SCALABLE
, ///< N Error Resilient Scalable
77 AOT_ER_TWINVQ
, ///< N Error Resilient Twin Vector Quantizer
78 AOT_ER_BSAC
, ///< N Error Resilient Bit-Sliced Arithmetic Coding
79 AOT_ER_AAC_LD
, ///< N Error Resilient Low Delay
80 AOT_ER_CELP
, ///< N Error Resilient Code Excited Linear Prediction
81 AOT_ER_HVXC
, ///< N Error Resilient Harmonic Vector eXcitation Coding
82 AOT_ER_HILN
, ///< N Error Resilient Harmonic and Individual Lines plus Noise
83 AOT_ER_PARAM
, ///< N Error Resilient Parametric
84 AOT_SSC
, ///< N SinuSoidal Coding
85 AOT_PS
, ///< N Parametric Stereo
86 AOT_SURROUND
, ///< N MPEG Surround
87 AOT_ESCAPE
, ///< Y Escape Value
88 AOT_L1
, ///< Y Layer 1
89 AOT_L2
, ///< Y Layer 2
90 AOT_L3
, ///< Y Layer 3
91 AOT_DST
, ///< N Direct Stream Transfer
92 AOT_ALS
, ///< Y Audio LosslesS
93 AOT_SLS
, ///< N Scalable LosslesS
94 AOT_SLS_NON_CORE
, ///< N Scalable LosslesS (non core)
95 AOT_ER_AAC_ELD
, ///< N Error Resilient Enhanced Low Delay
96 AOT_SMR_SIMPLE
, ///< N Symbolic Music Representation Simple
97 AOT_SMR_MAIN
, ///< N Symbolic Music Representation Main
98 AOT_USAC_NOSBR
, ///< N Unified Speech and Audio Coding (no SBR)
99 AOT_SAOC
, ///< N Spatial Audio Object Coding
100 AOT_LD_SURROUND
, ///< N Low Delay MPEG Surround
101 AOT_USAC
, ///< N Unified Speech and Audio Coding
104 #define MAX_PCE_SIZE 304 ///<Maximum size of a PCE including the 3-bit ID_PCE
105 ///<marker and the comment
107 int avpriv_copy_pce_data(PutBitContext
*pb
, GetBitContext
*gb
);
109 #endif /* AVCODEC_MPEG4AUDIO_H */