blob: 8fd32f96b3c9404d339305c5ab0681410a8451d4
| 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 | #include "get_bits.h" |
| 27 | #include "put_bits.h" |
| 28 | |
| 29 | typedef struct MPEG4AudioConfig { |
| 30 | int object_type; |
| 31 | int sampling_index; |
| 32 | int sample_rate; |
| 33 | int chan_config; |
| 34 | int sbr; ///< -1 implicit, 1 presence |
| 35 | int ext_object_type; |
| 36 | int ext_sampling_index; |
| 37 | int ext_sample_rate; |
| 38 | int ext_chan_config; |
| 39 | int channels; |
| 40 | int ps; ///< -1 implicit, 1 presence |
| 41 | int frame_length_short; |
| 42 | } MPEG4AudioConfig; |
| 43 | |
| 44 | extern av_export const int avpriv_mpeg4audio_sample_rates[16]; |
| 45 | extern const uint8_t ff_mpeg4audio_channels[8]; |
| 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 | * @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata. |
| 53 | */ |
| 54 | int ff_mpeg4audio_get_config_gb(MPEG4AudioConfig *c, GetBitContext *gb, |
| 55 | int sync_extension); |
| 56 | |
| 57 | /** |
| 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. |
| 64 | */ |
| 65 | int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, |
| 66 | int bit_size, int sync_extension); |
| 67 | |
| 68 | enum AudioObjectType { |
| 69 | AOT_NULL, |
| 70 | // Support? Name |
| 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 |
| 113 | }; |
| 114 | |
| 115 | #define MAX_PCE_SIZE 320 ///<Maximum size of a PCE including the 3-bit ID_PCE |
| 116 | ///<marker and the comment |
| 117 | |
| 118 | int avpriv_copy_pce_data(PutBitContext *pb, GetBitContext *gb); |
| 119 | |
| 120 | #endif /* AVCODEC_MPEG4AUDIO_H */ |
| 121 |