FFmpeg: AACContext Struct Reference

FFmpeg 4.0

main AAC context More...

#include <libavcodec/aac.h>

Data Fields
AVClass *	class

AVCodecContext *	avctx

AVFrame *	frame

int	is_saved
	Set if elements have stored overlap from previous frame. More...

DynamicRangeControl	che_drc

INTFLOAT	temp [128]

OutputConfiguration	oc [2]

int	warned_num_aac_frames

int	warned_960_sbr

int	warned_gain_control

void(*	imdct_and_windowing )(AACContext ac, SingleChannelElement sce)

void(*	apply_ltp )(AACContext ac, SingleChannelElement sce)

void(*	apply_tns )(INTFLOAT coef[1024], TemporalNoiseShaping tns, IndividualChannelStream ics, int decode)

void(*	windowing_and_mdct_ltp )(AACContext ac, INTFLOAT out, INTFLOAT in, IndividualChannelStream ics)

void(*	update_ltp )(AACContext ac, SingleChannelElement sce)

void(*	vector_pow43 )(int *coefs, int len)

void(*	subband_scale )(int dst, int src, int scale, int offset, int len)

const AVClass *	class

HANDLE_AACENCODER	handle

int	afterburner

int	eld_sbr

int	signaling

int	latm

int	header_period

int	vbr

AudioFrameQueue	afq

Channel element related data
ChannelElement *	che [4][MAX_ELEM_ID]

ChannelElement *	tag_che_map [4][MAX_ELEM_ID]

int	tags_mapped

int	warned_remapping_once

temporary aligned temporary buffers
(We do not want to have these on the stack.)
INTFLOAT	buf_mdct [1024]

Computed / set up during initialization
FFTContext	mdct

FFTContext	mdct_small

FFTContext	mdct_ld

FFTContext	mdct_ltp

MDCT15Context *	mdct120

MDCT15Context *	mdct480

MDCT15Context *	mdct960

AVFloatDSPContext *	fdsp

int	random_state

Members used for output
SingleChannelElement *	output_element [MAX_CHANNELS]
	Points to each SingleChannelElement. More...

Japanese DTV specific extension
int	force_dmono_mode
	0->not dmono, 1->use first channel, 2->use second channel More...

int	dmono_mode
	0->not dmono, 1->use first channel, 2->use second channel More...

Detailed Description

main AAC context

Definition at line 293 of file aac.h.

Field Documentation

◆ class [1/2]

AVClass* AACContext::class

Definition at line 294 of file aac.h.

◆ avctx

AVCodecContext* AACContext::avctx

Definition at line 295 of file aac.h.

Referenced by aac_decode_er_frame(), aac_decode_frame(), aac_decode_frame_int(), aac_decode_init(), apply_dependent_coupling(), apply_dependent_coupling_fixed(), che_configure(), decode_band_types(), decode_cpe(), decode_extension_payload(), decode_fill(), decode_ics(), decode_ics_info(), decode_prediction(), decode_scalefactors(), decode_spectrum_and_dequant(), decode_tns(), get_che(), latm_decode_audio_specific_config(), latm_decode_frame(), output_configure(), parse_adts_frame_header(), pop_output_configuration(), read_audio_mux_element(), read_sbr_data(), read_sbr_envelope(), read_sbr_extension(), read_sbr_grid(), read_sbr_noise(), read_stream_mux_config(), sbr_hf_calc_npatches(), sbr_hf_gen(), sbr_make_f_derived(), sbr_make_f_master(), sbr_mapping(), sbr_reset(), skip_data_stream_element(), and spectral_to_sample().

◆ frame

AVFrame* AACContext::frame

Definition at line 296 of file aac.h.

Referenced by aac_decode_er_frame(), aac_decode_frame_int(), and frame_configure_elements().

◆ is_saved

int AACContext::is_saved

Set if elements have stored overlap from previous frame.

Definition at line 298 of file aac.h.

◆ che_drc

DynamicRangeControl AACContext::che_drc

Definition at line 299 of file aac.h.

Referenced by decode_extension_payload().

◆ che

ChannelElement* AACContext::che[4][MAX_ELEM_ID]

Definition at line 305 of file aac.h.

Referenced by aac_decode_close(), apply_channel_coupling(), che_configure(), flush(), frame_configure_elements(), get_che(), output_configure(), and spectral_to_sample().

◆ tag_che_map

ChannelElement* AACContext::tag_che_map[4][MAX_ELEM_ID]

Definition at line 306 of file aac.h.

Referenced by get_che(), and output_configure().

◆ tags_mapped

int AACContext::tags_mapped

Definition at line 307 of file aac.h.

Referenced by aac_decode_er_frame(), aac_decode_frame_int(), and get_che().

◆ warned_remapping_once

int AACContext::warned_remapping_once

Definition at line 308 of file aac.h.

Referenced by get_che().

◆ buf_mdct

INTFLOAT AACContext::buf_mdct[1024]

Definition at line 316 of file aac.h.

Referenced by apply_ltp(), imdct_and_windowing(), imdct_and_windowing_960(), imdct_and_windowing_eld(), imdct_and_windowing_ld(), and update_ltp().

◆ mdct

FFTContext AACContext::mdct

Definition at line 323 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), imdct_and_windowing(), imdct_and_windowing_eld(), and imdct_and_windowing_ld().

◆ mdct_small

FFTContext AACContext::mdct_small

Definition at line 324 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), and imdct_and_windowing().

◆ mdct_ld

FFTContext AACContext::mdct_ld

Definition at line 325 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), imdct_and_windowing_eld(), and imdct_and_windowing_ld().

◆ mdct_ltp

FFTContext AACContext::mdct_ltp

Definition at line 326 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), and windowing_and_mdct_ltp().

◆ mdct120

MDCT15Context* AACContext::mdct120

Definition at line 330 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), and imdct_and_windowing_960().

◆ mdct480

MDCT15Context* AACContext::mdct480

Definition at line 331 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), and imdct_and_windowing_eld().

◆ mdct960

MDCT15Context* AACContext::mdct960

Definition at line 332 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), and imdct_and_windowing_960().

◆ fdsp

AVFloatDSPContext* AACContext::fdsp

Definition at line 333 of file aac.h.

Referenced by aac_decode_close(), aac_decode_init(), apply_intensity_stereo(), apply_mid_side_stereo(), decode_spectrum_and_dequant(), imdct_and_windowing(), imdct_and_windowing_960(), imdct_and_windowing_ld(), update_ltp(), and windowing_and_mdct_ltp().

◆ random_state

int AACContext::random_state

Definition at line 335 of file aac.h.

Referenced by aac_decode_init(), and decode_spectrum_and_dequant().

◆ output_element

SingleChannelElement* AACContext::output_element[MAX_CHANNELS]

Points to each SingleChannelElement.

Definition at line 342 of file aac.h.

Referenced by che_configure(), and frame_configure_elements().

◆ force_dmono_mode

int AACContext::force_dmono_mode

0->not dmono, 1->use first channel, 2->use second channel

Definition at line 350 of file aac.h.

Referenced by aac_decode_frame().

◆ dmono_mode

int AACContext::dmono_mode

0->not dmono, 1->use first channel, 2->use second channel

Definition at line 351 of file aac.h.

Referenced by aac_decode_frame(), aac_decode_frame_int(), and parse_adts_frame_header().

◆ temp

INTFLOAT AACContext::temp[128]

Definition at line 354 of file aac.h.

Referenced by imdct_and_windowing(), and imdct_and_windowing_960().

◆ oc

◆ warned_num_aac_frames

int AACContext::warned_num_aac_frames

Definition at line 357 of file aac.h.

Referenced by parse_adts_frame_header().

◆ warned_960_sbr

int AACContext::warned_960_sbr

Definition at line 358 of file aac.h.

Referenced by decode_extension_payload(), and decode_ga_specific_config().

◆ warned_gain_control

int AACContext::warned_gain_control

Definition at line 360 of file aac.h.

Referenced by decode_ics().

◆ imdct_and_windowing

void(* AACContext::imdct_and_windowing) (AACContext *ac, SingleChannelElement *sce)

Definition at line 363 of file aac.h.

Referenced by aacdec_init(), ff_aacdec_init_mips(), and spectral_to_sample().

◆ apply_ltp

void(* AACContext::apply_ltp) (AACContext *ac, SingleChannelElement *sce)

Definition at line 364 of file aac.h.

Referenced by aacdec_init(), ff_aacdec_init_mips(), and spectral_to_sample().

◆ apply_tns

void(* AACContext::apply_tns) (INTFLOAT coef[1024], TemporalNoiseShaping *tns, IndividualChannelStream *ics, int decode)

Definition at line 365 of file aac.h.

Referenced by aacdec_init(), apply_ltp(), and spectral_to_sample().

◆ windowing_and_mdct_ltp

void(* AACContext::windowing_and_mdct_ltp) (AACContext *ac, INTFLOAT *out, INTFLOAT *in, IndividualChannelStream *ics)

Definition at line 367 of file aac.h.

Referenced by aacdec_init(), and apply_ltp().

◆ update_ltp

void(* AACContext::update_ltp) (AACContext *ac, SingleChannelElement *sce)

Definition at line 369 of file aac.h.

Referenced by aacdec_init(), ff_aacdec_init_mips(), and spectral_to_sample().

◆ vector_pow43

void(* AACContext::vector_pow43) (int *coefs, int len)

Definition at line 370 of file aac.h.

Referenced by aacdec_init(), and decode_spectrum_and_dequant().

◆ subband_scale

void(* AACContext::subband_scale) (int *dst, int *src, int scale, int offset, int len)

Definition at line 371 of file aac.h.

Referenced by aacdec_init(), apply_intensity_stereo(), and decode_spectrum_and_dequant().

◆ class [2/2]

const AVClass* AACContext::class

Definition at line 30 of file libfdk-aacenc.c.

◆ handle

HANDLE_AACENCODER AACContext::handle

Definition at line 31 of file libfdk-aacenc.c.

Referenced by aac_encode_close(), aac_encode_frame(), and aac_encode_init().

◆ afterburner

int AACContext::afterburner

Definition at line 32 of file libfdk-aacenc.c.

Referenced by aac_encode_init().

◆ eld_sbr

int AACContext::eld_sbr

Definition at line 33 of file libfdk-aacenc.c.

Referenced by aac_encode_init().

◆ signaling

int AACContext::signaling

Definition at line 34 of file libfdk-aacenc.c.

Referenced by aac_encode_init().

◆ latm

int AACContext::latm

Definition at line 35 of file libfdk-aacenc.c.

Referenced by aac_encode_init().

◆ header_period

int AACContext::header_period

Definition at line 36 of file libfdk-aacenc.c.

Referenced by aac_encode_init().

◆ vbr

int AACContext::vbr

Definition at line 37 of file libfdk-aacenc.c.

Referenced by aac_encode_init().

◆ afq

AudioFrameQueue AACContext::afq

Definition at line 39 of file libfdk-aacenc.c.

Referenced by aac_encode_close(), aac_encode_frame(), and aac_encode_init().

The documentation for this struct was generated from the following files:

libavcodec/aac.h
libavcodec/libfdk-aacenc.c