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
41 int frame_length_short;
44 extern av_export const int avpriv_mpeg4audio_sample_rates[16];
45 extern const uint8_t ff_mpeg4audio_channels[8];
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 * @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
54 int ff_mpeg4audio_get_config_gb(MPEG4AudioConfig *c, GetBitContext *gb,
58 * Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration.
59 * @param[in] c MPEG4AudioConfig structure to fill.
60 * @param[in] buf Extradata from container.
61 * @param[in] bit_size Extradata size in bits.
62 * @param[in] sync_extension look for a sync extension after config if true.
63 * @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
65 int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf,
66 int bit_size, int sync_extension);
68 enum AudioObjectType {
71 AOT_AAC_MAIN, ///< Y Main
72 AOT_AAC_LC, ///< Y Low Complexity
73 AOT_AAC_SSR, ///< N (code in SoC repo) Scalable Sample Rate
74 AOT_AAC_LTP, ///< Y Long Term Prediction
75 AOT_SBR, ///< Y Spectral Band Replication
76 AOT_AAC_SCALABLE, ///< N Scalable
77 AOT_TWINVQ, ///< N Twin Vector Quantizer
78 AOT_CELP, ///< N Code Excited Linear Prediction
79 AOT_HVXC, ///< N Harmonic Vector eXcitation Coding
80 AOT_TTSI = 12, ///< N Text-To-Speech Interface
81 AOT_MAINSYNTH, ///< N Main Synthesis
82 AOT_WAVESYNTH, ///< N Wavetable Synthesis
83 AOT_MIDI, ///< N General MIDI
84 AOT_SAFX, ///< N Algorithmic Synthesis and Audio Effects
85 AOT_ER_AAC_LC, ///< N Error Resilient Low Complexity
86 AOT_ER_AAC_LTP = 19, ///< N Error Resilient Long Term Prediction
87 AOT_ER_AAC_SCALABLE, ///< N Error Resilient Scalable
88 AOT_ER_TWINVQ, ///< N Error Resilient Twin Vector Quantizer
89 AOT_ER_BSAC, ///< N Error Resilient Bit-Sliced Arithmetic Coding
90 AOT_ER_AAC_LD, ///< N Error Resilient Low Delay
91 AOT_ER_CELP, ///< N Error Resilient Code Excited Linear Prediction
92 AOT_ER_HVXC, ///< N Error Resilient Harmonic Vector eXcitation Coding
93 AOT_ER_HILN, ///< N Error Resilient Harmonic and Individual Lines plus Noise
94 AOT_ER_PARAM, ///< N Error Resilient Parametric
95 AOT_SSC, ///< N SinuSoidal Coding
96 AOT_PS, ///< N Parametric Stereo
97 AOT_SURROUND, ///< N MPEG Surround
98 AOT_ESCAPE, ///< Y Escape Value
99 AOT_L1, ///< Y Layer 1
100 AOT_L2, ///< Y Layer 2
101 AOT_L3, ///< Y Layer 3
102 AOT_DST, ///< N Direct Stream Transfer
103 AOT_ALS, ///< Y Audio LosslesS
104 AOT_SLS, ///< N Scalable LosslesS
105 AOT_SLS_NON_CORE, ///< N Scalable LosslesS (non core)
106 AOT_ER_AAC_ELD, ///< N Error Resilient Enhanced Low Delay
107 AOT_SMR_SIMPLE, ///< N Symbolic Music Representation Simple
108 AOT_SMR_MAIN, ///< N Symbolic Music Representation Main
109 AOT_USAC_NOSBR, ///< N Unified Speech and Audio Coding (no SBR)
110 AOT_SAOC, ///< N Spatial Audio Object Coding
111 AOT_LD_SURROUND, ///< N Low Delay MPEG Surround
112 AOT_USAC, ///< N Unified Speech and Audio Coding
115 #define MAX_PCE_SIZE 320 ///<Maximum size of a PCE including the 3-bit ID_PCE
116 ///<marker and the comment
118 int avpriv_copy_pce_data(PutBitContext *pb, GetBitContext *gb);
120 #endif /* AVCODEC_MPEG4AUDIO_H */