libavcodec/mpeg4audio.h

   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 {
  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 } MPEG4AudioConfig;
  40
  41 extern const int ff_mpeg4audio_sample_rates[16];
  42 extern const uint8_t ff_mpeg4audio_channels[8];
  43 /**
  44  * Parse MPEG-4 systems extradata to retrieve audio configuration.
  45  * @param[in] c        MPEG4AudioConfig structure to fill.
  46  * @param[in] buf      Extradata from container.
  47  * @param[in] buf_size Extradata size.
  48  * @return On error -1 is returned, on success AudioSpecificConfig bit index in extradata.
  49  */
  50 int ff_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int buf_size);
  51
  52 enum AudioObjectType {
  53     AOT_NULL,
  54                                // Support?                Name
  55     AOT_AAC_MAIN,              ///< Y                       Main
  56     AOT_AAC_LC,                ///< Y                       Low Complexity
  57     AOT_AAC_SSR,               ///< N (code in SoC repo)    Scalable Sample Rate
  58     AOT_AAC_LTP,               ///< N (code in SoC repo)    Long Term Prediction
  59     AOT_SBR,                   ///< N (in progress)         Spectral Band Replication
  60     AOT_AAC_SCALABLE,          ///< N                       Scalable
  61     AOT_TWINVQ,                ///< N                       Twin Vector Quantizer
  62     AOT_CELP,                  ///< N                       Code Excited Linear Prediction
  63     AOT_HVXC,                  ///< N                       Harmonic Vector eXcitation Coding
  64     AOT_TTSI             = 12, ///< N                       Text-To-Speech Interface
  65     AOT_MAINSYNTH,             ///< N                       Main Synthesis
  66     AOT_WAVESYNTH,             ///< N                       Wavetable Synthesis
  67     AOT_MIDI,                  ///< N                       General MIDI
  68     AOT_SAFX,                  ///< N                       Algorithmic Synthesis and Audio Effects
  69     AOT_ER_AAC_LC,             ///< N                       Error Resilient Low Complexity
  70     AOT_ER_AAC_LTP       = 19, ///< N                       Error Resilient Long Term Prediction
  71     AOT_ER_AAC_SCALABLE,       ///< N                       Error Resilient Scalable
  72     AOT_ER_TWINVQ,             ///< N                       Error Resilient Twin Vector Quantizer
  73     AOT_ER_BSAC,               ///< N                       Error Resilient Bit-Sliced Arithmetic Coding
  74     AOT_ER_AAC_LD,             ///< N                       Error Resilient Low Delay
  75     AOT_ER_CELP,               ///< N                       Error Resilient Code Excited Linear Prediction
  76     AOT_ER_HVXC,               ///< N                       Error Resilient Harmonic Vector eXcitation Coding
  77     AOT_ER_HILN,               ///< N                       Error Resilient Harmonic and Individual Lines plus Noise
  78     AOT_ER_PARAM,              ///< N                       Error Resilient Parametric
  79     AOT_SSC,                   ///< N                       SinuSoidal Coding
  80     AOT_PS,                    ///< N                       Parametric Stereo
  81     AOT_SURROUND,              ///< N                       MPEG Surround
  82     AOT_ESCAPE,                ///< Y                       Escape Value
  83     AOT_L1,                    ///< Y                       Layer 1
  84     AOT_L2,                    ///< Y                       Layer 2
  85     AOT_L3,                    ///< Y                       Layer 3
  86     AOT_DST,                   ///< N                       Direct Stream Transfer
  87     AOT_ALS,                   ///< N                       Audio LosslesS
  88     AOT_SLS,                   ///< N                       Scalable LosslesS
  89     AOT_SLS_NON_CORE,          ///< N                       Scalable LosslesS (non core)
  90     AOT_ER_AAC_ELD,            ///< N                       Error Resilient Enhanced Low Delay
  91     AOT_SMR_SIMPLE,            ///< N                       Symbolic Music Representation Simple
  92     AOT_SMR_MAIN,              ///< N                       Symbolic Music Representation Main
  93     AOT_USAC_NOSBR,            ///< N                       Unified Speech and Audio Coding (no SBR)
  94     AOT_SAOC,                  ///< N                       Spatial Audio Object Coding
  95     AOT_USAC             = 45, ///< N                       Unified Speech and Audio Coding
  96 };
  97
  98 #define MAX_PCE_SIZE 304 ///<Maximum size of a PCE including the 3-bit ID_PCE
  99                          ///<marker and the comment
 100
 101 int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb);
 102
 103 #endif /* AVCODEC_MPEG4AUDIO_H */