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

Data Structures
struct	MPEG4AudioConfig

Macros
#define	MAX_PCE_SIZE 320
	Maximum size of a PCE including the 3-bit ID_PCE. More...

Enumerations
enum	AudioObjectType { AOT_NULL = 0, AOT_AAC_MAIN = 1, AOT_AAC_LC = 2, AOT_AAC_SSR = 3, AOT_AAC_LTP = 4, AOT_SBR = 5, AOT_AAC_SCALABLE = 6, AOT_TWINVQ = 7, AOT_CELP = 8, AOT_HVXC = 9, AOT_TTSI = 12, AOT_MAINSYNTH = 13, AOT_WAVESYNTH = 14, AOT_MIDI = 15, AOT_SAFX = 16, AOT_ER_AAC_LC = 17, AOT_ER_AAC_LTP = 19, AOT_ER_AAC_SCALABLE = 20, AOT_ER_TWINVQ = 21, AOT_ER_BSAC = 22, AOT_ER_AAC_LD = 23, AOT_ER_CELP = 24, AOT_ER_HVXC = 25, AOT_ER_HILN = 26, AOT_ER_PARAM = 27, AOT_SSC = 28, AOT_PS = 29, AOT_SURROUND = 30, AOT_ESCAPE = 31, AOT_L1 = 32, AOT_L2 = 33, AOT_L3 = 34, AOT_DST = 35, AOT_ALS = 36, AOT_SLS = 37, AOT_SLS_NON_CORE = 38, AOT_ER_AAC_ELD = 39, AOT_SMR_SIMPLE = 40, AOT_SMR_MAIN = 41, AOT_USAC = 42, AOT_SAOC = 43, AOT_LD_SURROUND = 44 }

Functions
int	ff_mpeg4audio_get_config_gb (MPEG4AudioConfig c, GetBitContext gb, int sync_extension, void *logctx)
	Parse MPEG-4 systems extradata from a potentially unaligned GetBitContext to retrieve audio configuration. More...

int	avpriv_mpeg4audio_get_config2 (MPEG4AudioConfig c, const uint8_t buf, int size, int sync_extension, void *logctx)
	Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration. More...

Variables
const int	ff_mpeg4audio_sample_rates [16]

const uint8_t	ff_mpeg4audio_channels [15]

Macro Definition Documentation

◆ MAX_PCE_SIZE

#define MAX_PCE_SIZE 320

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

marker and the comment

Definition at line 118 of file mpeg4audio.h.

Enumeration Type Documentation

◆ AudioObjectType

enum AudioObjectType

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	Y 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	Y Unified Speech and Audio Coding.
AOT_SAOC	N Spatial Audio Object Coding.
AOT_LD_SURROUND	N Low Delay MPEG Surround.

Definition at line 70 of file mpeg4audio.h.

Function Documentation

◆ ff_mpeg4audio_get_config_gb()

int ff_mpeg4audio_get_config_gb	(	MPEG4AudioConfig *	c,
		GetBitContext *	gb,
		int	sync_extension,
		void *	logctx
	)

Parse MPEG-4 systems extradata from a potentially unaligned GetBitContext to retrieve audio configuration.

Parameters

[in]	c	MPEG4AudioConfig structure to fill.
[in]	gb	Extradata from container.
[in]	sync_extension	look for a sync extension after config if true.
[in]	logctx	opaque struct starting with an AVClass element, used for logging.

Returns: negative AVERROR code on error, on success AudioSpecificConfig bit index in extradata.

Definition at line 92 of file mpeg4audio.c.

Referenced by avpriv_mpeg4audio_get_config2(), and decode_audio_specific_config_gb().

◆ avpriv_mpeg4audio_get_config2()

int avpriv_mpeg4audio_get_config2	(	MPEG4AudioConfig *	c,
		const uint8_t *	buf,
		int	size,
		int	sync_extension,
		void *	logctx
	)

Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration.

Parameters

[in]	c	MPEG4AudioConfig structure to fill.
[in]	buf	Extradata from container.
[in]	size	Extradata size in bytes.
[in]	sync_extension	look for a sync extension after config if true.
[in]	logctx	opaque struct starting with an AVClass element, used for logging.

Returns: negative AVERROR code on error, AudioSpecificConfig bit index in extradata on success.

Definition at line 165 of file mpeg4audio.c.

Referenced by aac_adtstoasc_init(), aac_decoder_config(), adts_decode_extradata(), ff_mp4_read_dec_config_descr(), latm_decode_extradata(), and read_specific_config().

Variable Documentation

◆ ff_mpeg4audio_sample_rates

const int ff_mpeg4audio_sample_rates[16]

Definition at line 30 of file mpeg4audio_sample_rates.h.

Referenced by aac_encode_init(), ff_adts_header_parse(), flv_write_aac_header(), and get_sample_rate().

◆ ff_mpeg4audio_channels

const uint8_t ff_mpeg4audio_channels[15]

Definition at line 59 of file mpeg4audio.c.

Referenced by ff_aac_decode_init(), ff_mpeg4audio_get_config_gb(), and ftr_parse().

Data Structures

Macros

Enumerations

Functions

Variables