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 29typedef struct { 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} MPEG4AudioConfig; 42 43extern const int ff_mpeg4audio_sample_rates[16]; 44extern const uint8_t ff_mpeg4audio_channels[8]; 45/** 46 * Parse MPEG-4 systems extradata to retrieve audio configuration. 47 * @param[in] c MPEG4AudioConfig structure to fill. 48 * @param[in] buf Extradata from container. 49 * @param[in] buf_size Extradata size. 50 * @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata. 51 */ 52int ff_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int buf_size); 53 54enum AudioObjectType { 55 AOT_NULL, 56 // Support? Name 57 AOT_AAC_MAIN, ///< Y Main 58 AOT_AAC_LC, ///< Y Low Complexity 59 AOT_AAC_SSR, ///< N (code in SoC repo) Scalable Sample Rate 60 AOT_AAC_LTP, ///< N (code in SoC repo) Long Term Prediction 61 AOT_SBR, ///< Y Spectral Band Replication 62 AOT_AAC_SCALABLE, ///< N Scalable 63 AOT_TWINVQ, ///< N Twin Vector Quantizer 64 AOT_CELP, ///< N Code Excited Linear Prediction 65 AOT_HVXC, ///< N Harmonic Vector eXcitation Coding 66 AOT_TTSI = 12, ///< N Text-To-Speech Interface 67 AOT_MAINSYNTH, ///< N Main Synthesis 68 AOT_WAVESYNTH, ///< N Wavetable Synthesis 69 AOT_MIDI, ///< N General MIDI 70 AOT_SAFX, ///< N Algorithmic Synthesis and Audio Effects 71 AOT_ER_AAC_LC, ///< N Error Resilient Low Complexity 72 AOT_ER_AAC_LTP = 19, ///< N Error Resilient Long Term Prediction 73 AOT_ER_AAC_SCALABLE, ///< N Error Resilient Scalable 74 AOT_ER_TWINVQ, ///< N Error Resilient Twin Vector Quantizer 75 AOT_ER_BSAC, ///< N Error Resilient Bit-Sliced Arithmetic Coding 76 AOT_ER_AAC_LD, ///< N Error Resilient Low Delay 77 AOT_ER_CELP, ///< N Error Resilient Code Excited Linear Prediction 78 AOT_ER_HVXC, ///< N Error Resilient Harmonic Vector eXcitation Coding 79 AOT_ER_HILN, ///< N Error Resilient Harmonic and Individual Lines plus Noise 80 AOT_ER_PARAM, ///< N Error Resilient Parametric 81 AOT_SSC, ///< N SinuSoidal Coding 82 AOT_PS, ///< N Parametric Stereo 83 AOT_SURROUND, ///< N MPEG Surround 84 AOT_ESCAPE, ///< Y Escape Value 85 AOT_L1, ///< Y Layer 1 86 AOT_L2, ///< Y Layer 2 87 AOT_L3, ///< Y Layer 3 88 AOT_DST, ///< N Direct Stream Transfer 89 AOT_ALS, ///< Y Audio LosslesS 90 AOT_SLS, ///< N Scalable LosslesS 91 AOT_SLS_NON_CORE, ///< N Scalable LosslesS (non core) 92 AOT_ER_AAC_ELD, ///< N Error Resilient Enhanced Low Delay 93 AOT_SMR_SIMPLE, ///< N Symbolic Music Representation Simple 94 AOT_SMR_MAIN, ///< N Symbolic Music Representation Main 95 AOT_USAC_NOSBR, ///< N Unified Speech and Audio Coding (no SBR) 96 AOT_SAOC, ///< N Spatial Audio Object Coding 97 AOT_LD_SURROUND, ///< N Low Delay MPEG Surround 98 AOT_USAC, ///< N Unified Speech and Audio Coding 99}; 100 101#define MAX_PCE_SIZE 304 ///<Maximum size of a PCE including the 3-bit ID_PCE 102 ///<marker and the comment 103 104int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb); 105 106#endif /* AVCODEC_MPEG4AUDIO_H */ 107