Individual Channel Stream. More...

#include <aacdec.h>

Data Fields
uint8_t	max_sfb
	number of scalefactor bands per group

enum WindowSequence	window_sequence [2]

uint8_t	use_kb_window [2]
	If set, use Kaiser-Bessel window, otherwise use a sine window.

int	num_window_groups

int	prev_num_window_groups
	Previous frame's number of window groups.

uint8_t	group_len [8]

LongTermPrediction	ltp

const uint16_t *	swb_offset
	table of offsets to the lowest spectral coefficient of a scalefactor band, sfb, for a particular window

int	num_swb
	number of scalefactor window bands

int	num_windows

int	tns_max_bands

int	predictor_present

int	predictor_initialized

int	predictor_reset_group

uint8_t	prediction_used [41]

uint8_t	window_clipping [8]
	set if a certain window is near clipping

const uint8_t *	swb_sizes
	table of scalefactor band sizes for a particular window

float	clip_avoidance_factor
	set if any window is near clipping to the necessary atennuation factor to avoid it

Detailed Description

Individual Channel Stream.

Definition at line 169 of file aacdec.h.

Field Documentation

◆ max_sfb

uint8_t IndividualChannelStream::max_sfb

◆ window_sequence

enum WindowSequence IndividualChannelStream::window_sequence

◆ use_kb_window

uint8_t IndividualChannelStream::use_kb_window

If set, use Kaiser-Bessel window, otherwise use a sine window.

Definition at line 172 of file aacdec.h.

Referenced by aac_encode_frame(), complex_stereo_get_filter(), decode_cpe(), decode_ics_info(), decode_usac_core_coder(), decode_usac_stereo_info(), imdct_and_windowing(), imdct_and_windowing_768(), imdct_and_windowing_960(), imdct_and_windowing_ld(), put_ics_info(), and update_ltp().

◆ num_window_groups

int IndividualChannelStream::num_window_groups

◆ prev_num_window_groups

int IndividualChannelStream::prev_num_window_groups

Previous frame's number of window groups.

Definition at line 174 of file aacdec.h.

Referenced by decode_ics_info(), decode_usac_stereo_info(), and setup_sce().

◆ group_len

uint8_t IndividualChannelStream::group_len

Definition at line 175 of file aacdec.h.

Referenced by aac_encode_frame(), aac_is_encoding_err(), adjust_frame_information(), apply_complex_stereo(), apply_dependent_coupling(), apply_dependent_coupling(), apply_intensity_stereo(), apply_intensity_stereo(), apply_mid_side_stereo(), apply_mid_side_stereo(), apply_noise_fill(), complex_stereo_downmix_cur(), complex_stereo_downmix_prev(), decode_ics_info(), decode_spectrum_and_dequant(), encode_band_info(), encode_ms_info(), encode_scale_factors(), encode_spectral_coeffs(), ff_aac_search_for_is(), ff_aac_search_for_tns(), ff_init_nextband_map(), mark_pns(), nmr_band_curve(), nmr_commit_channel(), nmr_decide_stereo(), nmr_setup_channel(), put_ics_info(), search_for_ms(), search_for_pns(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), search_for_tns_short_pooled(), set_special_band_scalefactors(), setup_sce(), spectrum_scale(), and tns_max_nonpns().

◆ ltp

LongTermPrediction IndividualChannelStream::ltp

Definition at line 176 of file aacdec.h.

Referenced by decode_cpe(), decode_ics_info(), and spectral_to_sample().

◆ swb_offset

const uint16_t * IndividualChannelStream::swb_offset

table of offsets to the lowest spectral coefficient of a scalefactor band, sfb, for a particular window

Definition at line 177 of file aacdec.h.

Referenced by aac_encode_frame(), apply_complex_stereo(), apply_dependent_coupling(), apply_dependent_coupling(), apply_intensity_stereo(), apply_mid_side_stereo(), apply_noise_fill(), complex_stereo_downmix_cur(), complex_stereo_downmix_prev(), decode_ics_info(), decode_spectrum_and_dequant(), decode_usac_core_coder(), ff_aac_apply_tns(), ff_aac_decode_ics(), ff_aac_search_for_tns(), mark_pns(), nmr_setup_channel(), search_for_pns(), search_for_quantizers_twoloop(), search_for_tns_short_pooled(), setup_sce(), and spectrum_scale().

◆ num_swb

int IndividualChannelStream::num_swb

number of scalefactor window bands

Definition at line 178 of file aacdec.h.

Referenced by aac_encode_frame(), adjust_frame_information(), apply_intensity_stereo(), apply_mid_side_stereo(), decode_ics_info(), ff_aac_apply_tns(), ff_aac_decode_ics(), ff_aac_search_for_is(), ff_aac_search_for_tns(), ff_init_nextband_map(), mark_pns(), nmr_commit_channel(), nmr_decide_stereo(), nmr_setup_channel(), search_for_ms(), search_for_pns(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), search_for_tns_short_pooled(), set_special_band_scalefactors(), and setup_sce().

◆ num_windows

int IndividualChannelStream::num_windows

◆ tns_max_bands

int IndividualChannelStream::tns_max_bands

Definition at line 180 of file aacdec.h.

Referenced by aac_encode_frame(), decode_ics_info(), ff_aac_apply_tns(), ff_aac_search_for_tns(), nmr_setup_channel(), search_for_tns_short_pooled(), and setup_sce().

◆ predictor_present

int IndividualChannelStream::predictor_present

Definition at line 181 of file aacdec.h.

Referenced by decode_cpe(), decode_ics_info(), and spectral_to_sample().

◆ predictor_initialized

int IndividualChannelStream::predictor_initialized

Definition at line 182 of file aacdec.h.

◆ predictor_reset_group

int IndividualChannelStream::predictor_reset_group

Definition at line 183 of file aacdec.h.

Referenced by decode_ics_info(), and decode_prediction().

◆ prediction_used

uint8_t IndividualChannelStream::prediction_used[41]

Definition at line 184 of file aacdec.h.

Referenced by decode_prediction().

◆ window_clipping

uint8_t IndividualChannelStream::window_clipping

set if a certain window is near clipping

Definition at line 185 of file aacdec.h.

Referenced by aac_encode_frame(), and encode_spectral_coeffs().

◆ swb_sizes

const uint8_t* IndividualChannelStream::swb_sizes

table of scalefactor band sizes for a particular window

Definition at line 85 of file aacenc.h.

Referenced by aac_encode_frame(), aac_is_encoding_err(), apply_intensity_stereo(), apply_mid_side_stereo(), avoid_clipping(), codebook_trellis_rate(), encode_spectral_coeffs(), ff_aac_search_for_is(), nmr_band_curve(), nmr_decide_stereo(), nmr_setup_channel(), search_for_ms(), search_for_pns(), search_for_quantizers_fast(), and search_for_quantizers_twoloop().

◆ clip_avoidance_factor

float IndividualChannelStream::clip_avoidance_factor

set if any window is near clipping to the necessary atennuation factor to avoid it

Definition at line 90 of file aacenc.h.

Referenced by aac_encode_frame(), and avoid_clipping().

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

libavcodec/aac/aacdec.h
libavcodec/aacenc.h

Data Fields