1/* 2 * MPEG-4 Audio common header 3 * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr> 4 * 5 * This file is part of Libav. 6 * 7 * Libav 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 * Libav 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 Libav; 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 avpriv_mpeg4audio_sample_rates[16]; 44extern const uint8_t ff_mpeg4audio_channels[8]; 45 46/** 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. 53 */ 54int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, 55 int bit_size, int sync_extension); 56 57enum AudioObjectType { 58 AOT_NULL, 59 // Support? Name 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 102}; 103 104#define MAX_PCE_SIZE 304 ///<Maximum size of a PCE including the 3-bit ID_PCE 105 ///<marker and the comment 106 107int avpriv_copy_pce_data(PutBitContext *pb, GetBitContext *gb); 108 109#endif /* AVCODEC_MPEG4AUDIO_H */ 110