Data Structures | Defines | Enumerations | Functions | Variables

libavcodec/mpeg4audio.h File Reference

#include <stdint.h>
#include "get_bits.h"
#include "put_bits.h"

Go to the source code of this file.

Data Structures

struct  MPEG4AudioConfig

Defines

#define MAX_PCE_SIZE   304
 Maximum size of a PCE including the 3-bit ID_PCE.

Enumerations

enum  AudioObjectType {
  AOT_NULL, AOT_AAC_MAIN, AOT_AAC_LC, AOT_AAC_SSR,
  AOT_AAC_LTP, AOT_SBR, AOT_AAC_SCALABLE, AOT_TWINVQ,
  AOT_CELP, AOT_HVXC, AOT_TTSI = 12, AOT_MAINSYNTH,
  AOT_WAVESYNTH, AOT_MIDI, AOT_SAFX, AOT_ER_AAC_LC,
  AOT_ER_AAC_LTP = 19, AOT_ER_AAC_SCALABLE, AOT_ER_TWINVQ, AOT_ER_BSAC,
  AOT_ER_AAC_LD, AOT_ER_CELP, AOT_ER_HVXC, AOT_ER_HILN,
  AOT_ER_PARAM, AOT_SSC, AOT_PS, AOT_SURROUND,
  AOT_ESCAPE, AOT_L1, AOT_L2, AOT_L3,
  AOT_DST, AOT_ALS, AOT_SLS, AOT_SLS_NON_CORE,
  AOT_ER_AAC_ELD, AOT_SMR_SIMPLE, AOT_SMR_MAIN, AOT_USAC_NOSBR,
  AOT_SAOC, AOT_LD_SURROUND, AOT_USAC
}

Functions

int ff_mpeg4audio_get_config (MPEG4AudioConfig *c, const uint8_t *buf, int buf_size)
 Parse MPEG-4 systems extradata to retrieve audio configuration.
int ff_copy_pce_data (PutBitContext *pb, GetBitContext *gb)

Variables

const int ff_mpeg4audio_sample_rates [16]
const uint8_t ff_mpeg4audio_channels [8]

Define Documentation

#define MAX_PCE_SIZE   304

Maximum size of a PCE including the 3-bit ID_PCE.

marker and the comment

Definition at line 101 of file mpeg4audio.h.

Referenced by aac_adtstoasc_filter(), and ff_adts_decode_extradata().


Enumeration Type Documentation

Enumerator:
AOT_NULL 
AOT_AAC_MAIN 

Y Main.

AOT_AAC_LC 

Y Low Complexity.

AOT_AAC_SSR 

N (code in SoC repo) Scalable Sample Rate.

AOT_AAC_LTP 

N (code in SoC repo) Long Term Prediction.

AOT_SBR 

Y Spectral Band Replication.

AOT_AAC_SCALABLE 

N Scalable.

AOT_TWINVQ 

N Twin Vector Quantizer.

AOT_CELP 

N Code Excited Linear Prediction.

AOT_HVXC 

N Harmonic Vector eXcitation Coding.

AOT_TTSI 

N Text-To-Speech Interface.

AOT_MAINSYNTH 

N Main Synthesis.

AOT_WAVESYNTH 

N Wavetable Synthesis.

AOT_MIDI 

N General MIDI.

AOT_SAFX 

N Algorithmic Synthesis and Audio Effects.

AOT_ER_AAC_LC 

N Error Resilient Low Complexity.

AOT_ER_AAC_LTP 

N Error Resilient Long Term Prediction.

AOT_ER_AAC_SCALABLE 

N Error Resilient Scalable.

AOT_ER_TWINVQ 

N Error Resilient Twin Vector Quantizer.

AOT_ER_BSAC 

N Error Resilient Bit-Sliced Arithmetic Coding.

AOT_ER_AAC_LD 

N Error Resilient Low Delay.

AOT_ER_CELP 

N Error Resilient Code Excited Linear Prediction.

AOT_ER_HVXC 

N Error Resilient Harmonic Vector eXcitation Coding.

AOT_ER_HILN 

N Error Resilient Harmonic and Individual Lines plus Noise.

AOT_ER_PARAM 

N Error Resilient Parametric.

AOT_SSC 

N SinuSoidal Coding.

AOT_PS 

N Parametric Stereo.

AOT_SURROUND 

N MPEG Surround.

AOT_ESCAPE 

Y Escape Value.

AOT_L1 

Y Layer 1.

AOT_L2 

Y Layer 2.

AOT_L3 

Y Layer 3.

AOT_DST 

N Direct Stream Transfer.

AOT_ALS 

Y Audio LosslesS.

AOT_SLS 

N Scalable LosslesS.

AOT_SLS_NON_CORE 

N Scalable LosslesS (non core).

AOT_ER_AAC_ELD 

N Error Resilient Enhanced Low Delay.

AOT_SMR_SIMPLE 

N Symbolic Music Representation Simple.

AOT_SMR_MAIN 

N Symbolic Music Representation Main.

AOT_USAC_NOSBR 

N Unified Speech and Audio Coding (no SBR).

AOT_SAOC 

N Spatial Audio Object Coding.

AOT_LD_SURROUND 

N Low Delay MPEG Surround.

AOT_USAC 

N Unified Speech and Audio Coding.

Definition at line 54 of file mpeg4audio.h.


Function Documentation

int ff_copy_pce_data ( PutBitContext pb,
GetBitContext gb 
)

Definition at line 146 of file mpeg4audio.c.

Referenced by aac_adtstoasc_filter(), and ff_adts_decode_extradata().

int ff_mpeg4audio_get_config ( MPEG4AudioConfig c,
const uint8_t *  buf,
int  buf_size 
)

Parse MPEG-4 systems extradata to retrieve audio configuration.

Parameters:
[in] c MPEG4AudioConfig structure to fill.
[in] buf Extradata from container.
[in] buf_size Extradata size.
Returns:
On error -1 is returned, on success AudioSpecificConfig bit index in extradata.

Definition at line 79 of file mpeg4audio.c.

Referenced by decode_audio_specific_config(), ff_mov_read_esds(), flv_read_packet(), and read_specific_config().


Variable Documentation

const uint8_t ff_mpeg4audio_channels[8]

Definition at line 60 of file mpeg4audio.c.

Referenced by aac_sync(), and ff_mpeg4audio_get_config().