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ffmpeg / libavcodec / mpeg4audio.h @ 2912e87a

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/*
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 * MPEG-4 Audio common header
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 * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_MPEG4AUDIO_H
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#define AVCODEC_MPEG4AUDIO_H
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#include <stdint.h>
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#include "get_bits.h"
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#include "put_bits.h"
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typedef struct {
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    int object_type;
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    int sampling_index;
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    int sample_rate;
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    int chan_config;
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    int sbr; //< -1 implicit, 1 presence
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    int ext_object_type;
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    int ext_sampling_index;
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    int ext_sample_rate;
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    int ext_chan_config;
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    int channels;
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    int ps;  //< -1 implicit, 1 presence
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} MPEG4AudioConfig;
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extern const int ff_mpeg4audio_sample_rates[16];
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extern const uint8_t ff_mpeg4audio_channels[8];
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/**
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 * Parse MPEG-4 systems extradata to retrieve audio configuration.
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 * @param[in] c        MPEG4AudioConfig structure to fill.
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 * @param[in] buf      Extradata from container.
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 * @param[in] buf_size Extradata size.
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 * @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
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 */
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int ff_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int buf_size);
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enum AudioObjectType {
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    AOT_NULL,
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                               // Support?                Name
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    AOT_AAC_MAIN,              ///< Y                       Main
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    AOT_AAC_LC,                ///< Y                       Low Complexity
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    AOT_AAC_SSR,               ///< N (code in SoC repo)    Scalable Sample Rate
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    AOT_AAC_LTP,               ///< Y                       Long Term Prediction
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    AOT_SBR,                   ///< Y                       Spectral Band Replication
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    AOT_AAC_SCALABLE,          ///< N                       Scalable
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    AOT_TWINVQ,                ///< N                       Twin Vector Quantizer
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    AOT_CELP,                  ///< N                       Code Excited Linear Prediction
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    AOT_HVXC,                  ///< N                       Harmonic Vector eXcitation Coding
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    AOT_TTSI             = 12, ///< N                       Text-To-Speech Interface
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    AOT_MAINSYNTH,             ///< N                       Main Synthesis
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    AOT_WAVESYNTH,             ///< N                       Wavetable Synthesis
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    AOT_MIDI,                  ///< N                       General MIDI
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    AOT_SAFX,                  ///< N                       Algorithmic Synthesis and Audio Effects
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    AOT_ER_AAC_LC,             ///< N                       Error Resilient Low Complexity
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    AOT_ER_AAC_LTP       = 19, ///< N                       Error Resilient Long Term Prediction
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    AOT_ER_AAC_SCALABLE,       ///< N                       Error Resilient Scalable
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    AOT_ER_TWINVQ,             ///< N                       Error Resilient Twin Vector Quantizer
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    AOT_ER_BSAC,               ///< N                       Error Resilient Bit-Sliced Arithmetic Coding
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    AOT_ER_AAC_LD,             ///< N                       Error Resilient Low Delay
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    AOT_ER_CELP,               ///< N                       Error Resilient Code Excited Linear Prediction
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    AOT_ER_HVXC,               ///< N                       Error Resilient Harmonic Vector eXcitation Coding
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    AOT_ER_HILN,               ///< N                       Error Resilient Harmonic and Individual Lines plus Noise
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    AOT_ER_PARAM,              ///< N                       Error Resilient Parametric
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    AOT_SSC,                   ///< N                       SinuSoidal Coding
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    AOT_PS,                    ///< N                       Parametric Stereo
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    AOT_SURROUND,              ///< N                       MPEG Surround
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    AOT_ESCAPE,                ///< Y                       Escape Value
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    AOT_L1,                    ///< Y                       Layer 1
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    AOT_L2,                    ///< Y                       Layer 2
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    AOT_L3,                    ///< Y                       Layer 3
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    AOT_DST,                   ///< N                       Direct Stream Transfer
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    AOT_ALS,                   ///< Y                       Audio LosslesS
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    AOT_SLS,                   ///< N                       Scalable LosslesS
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    AOT_SLS_NON_CORE,          ///< N                       Scalable LosslesS (non core)
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    AOT_ER_AAC_ELD,            ///< N                       Error Resilient Enhanced Low Delay
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    AOT_SMR_SIMPLE,            ///< N                       Symbolic Music Representation Simple
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    AOT_SMR_MAIN,              ///< N                       Symbolic Music Representation Main
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    AOT_USAC_NOSBR,            ///< N                       Unified Speech and Audio Coding (no SBR)
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    AOT_SAOC,                  ///< N                       Spatial Audio Object Coding
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    AOT_LD_SURROUND,           ///< N                       Low Delay MPEG Surround
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    AOT_USAC,                  ///< N                       Unified Speech and Audio Coding
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};
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#define MAX_PCE_SIZE 304 ///<Maximum size of a PCE including the 3-bit ID_PCE
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                         ///<marker and the comment
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int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb);
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#endif /* AVCODEC_MPEG4AUDIO_H */