mpeg4audio.h (6520B)
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 27 #include "get_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 const int ff_mpeg4audio_sample_rates[16]; 45 extern const uint8_t ff_mpeg4audio_channels[15]; 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 * @param[in] logctx opaque struct starting with an AVClass element, used for logging. 53 * @return negative AVERROR code on error, on success AudioSpecificConfig bit index in extradata. 54 */ 55 int ff_mpeg4audio_get_config_gb(MPEG4AudioConfig *c, GetBitContext *gb, 56 int sync_extension, void *logctx); 57 58 /** 59 * Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration. 60 * @param[in] c MPEG4AudioConfig structure to fill. 61 * @param[in] buf Extradata from container. 62 * @param[in] size Extradata size in bytes. 63 * @param[in] sync_extension look for a sync extension after config if true. 64 * @param[in] logctx opaque struct starting with an AVClass element, used for logging. 65 * @return negative AVERROR code on error, AudioSpecificConfig bit index in extradata on success. 66 */ 67 int avpriv_mpeg4audio_get_config2(MPEG4AudioConfig *c, const uint8_t *buf, 68 int size, int sync_extension, void *logctx); 69 70 enum AudioObjectType { 71 AOT_NULL = 0, 72 // Support? Name 73 AOT_AAC_MAIN = 1, ///< Y Main 74 AOT_AAC_LC = 2, ///< Y Low Complexity 75 AOT_AAC_SSR = 3, ///< N (code in SoC repo) Scalable Sample Rate 76 AOT_AAC_LTP = 4, ///< Y Long Term Prediction 77 AOT_SBR = 5, ///< Y Spectral Band Replication 78 AOT_AAC_SCALABLE = 6, ///< N Scalable 79 AOT_TWINVQ = 7, ///< N Twin Vector Quantizer 80 AOT_CELP = 8, ///< N Code Excited Linear Prediction 81 AOT_HVXC = 9, ///< N Harmonic Vector eXcitation Coding 82 83 AOT_TTSI = 12, ///< N Text-To-Speech Interface 84 AOT_MAINSYNTH = 13, ///< N Main Synthesis 85 AOT_WAVESYNTH = 14, ///< N Wavetable Synthesis 86 AOT_MIDI = 15, ///< N General MIDI 87 AOT_SAFX = 16, ///< N Algorithmic Synthesis and Audio Effects 88 AOT_ER_AAC_LC = 17, ///< N Error Resilient Low Complexity 89 90 AOT_ER_AAC_LTP = 19, ///< N Error Resilient Long Term Prediction 91 AOT_ER_AAC_SCALABLE = 20, ///< N Error Resilient Scalable 92 AOT_ER_TWINVQ = 21, ///< N Error Resilient Twin Vector Quantizer 93 AOT_ER_BSAC = 22, ///< N Error Resilient Bit-Sliced Arithmetic Coding 94 AOT_ER_AAC_LD = 23, ///< N Error Resilient Low Delay 95 AOT_ER_CELP = 24, ///< N Error Resilient Code Excited Linear Prediction 96 AOT_ER_HVXC = 25, ///< N Error Resilient Harmonic Vector eXcitation Coding 97 AOT_ER_HILN = 26, ///< N Error Resilient Harmonic and Individual Lines plus Noise 98 AOT_ER_PARAM = 27, ///< N Error Resilient Parametric 99 AOT_SSC = 28, ///< N SinuSoidal Coding 100 AOT_PS = 29, ///< N Parametric Stereo 101 AOT_SURROUND = 30, ///< N MPEG Surround 102 AOT_ESCAPE = 31, ///< Y Escape Value 103 AOT_L1 = 32, ///< Y Layer 1 104 AOT_L2 = 33, ///< Y Layer 2 105 AOT_L3 = 34, ///< Y Layer 3 106 AOT_DST = 35, ///< N Direct Stream Transfer 107 AOT_ALS = 36, ///< Y Audio LosslesS 108 AOT_SLS = 37, ///< N Scalable LosslesS 109 AOT_SLS_NON_CORE = 38, ///< N Scalable LosslesS (non core) 110 AOT_ER_AAC_ELD = 39, ///< N Error Resilient Enhanced Low Delay 111 AOT_SMR_SIMPLE = 40, ///< N Symbolic Music Representation Simple 112 AOT_SMR_MAIN = 41, ///< N Symbolic Music Representation Main 113 AOT_USAC = 42, ///< Y Unified Speech and Audio Coding 114 AOT_SAOC = 43, ///< N Spatial Audio Object Coding 115 AOT_LD_SURROUND = 44, ///< N Low Delay MPEG Surround 116 }; 117 118 #define MAX_PCE_SIZE 320 ///<Maximum size of a PCE including the 3-bit ID_PCE 119 ///<marker and the comment 120 121 #endif /* AVCODEC_MPEG4AUDIO_H */