FFmpeg
Data Fields
SpectralBandReplication Struct Reference

Spectral Band Replication. More...

#include <sbr.h>

Data Fields

int sample_rate
 
int start
 
int ready_for_dequant
 
int id_aac
 
int reset
 
SpectrumParameters spectrum_params
 
int bs_amp_res_header
 
unsigned bs_coupling
 
AAC_SIGNE k [5]
 k0, k1, k2 More...
 
AAC_SIGNE kx [2]
 kx', and kx respectively, kx is the first QMF subband where SBR is used. More...
 
AAC_SIGNE m [2]
 M' and M respectively, M is the number of QMF subbands that use SBR. More...
 
unsigned kx_and_m_pushed
 
AAC_SIGNE n_master
 The number of frequency bands in f_master. More...
 
SBRData data [2]
 
PSContext ps
 
AAC_SIGNE n [2]
 N_Low and N_High respectively, the number of frequency bands for low and high resolution. More...
 
AAC_SIGNE n_q
 Number of noise floor bands. More...
 
AAC_SIGNE n_lim
 Number of limiter bands. More...
 
uint16_t f_master [49]
 The master QMF frequency grouping. More...
 
uint16_t f_tablelow [25]
 Frequency borders for low resolution SBR. More...
 
uint16_t f_tablehigh [49]
 Frequency borders for high resolution SBR. More...
 
uint16_t f_tablenoise [6]
 Frequency borders for noise floors. More...
 
uint16_t f_tablelim [30]
 Frequency borders for the limiter. More...
 
AAC_SIGNE num_patches
 
uint8_t patch_num_subbands [6]
 
uint8_t patch_start_subband [6]
 
INTFLOAT X_low [32][40][2]
 QMF low frequency input to the HF generator. More...
 
INTFLOAT X_high [64][40][2]
 QMF output of the HF generator. More...
 
INTFLOAT X [2][2][38][64]
 QMF values of the reconstructed signal. More...
 
INTFLOAT alpha0 [64][2]
 Zeroth coefficient used to filter the subband signals. More...
 
INTFLOAT alpha1 [64][2]
 First coefficient used to filter the subband signals. More...
 
AAC_FLOAT e_origmapped [7][48]
 Dequantized envelope scalefactors, remapped. More...
 
AAC_FLOAT q_mapped [7][48]
 Dequantized noise scalefactors, remapped. More...
 
uint8_t s_mapped [7][48]
 Sinusoidal presence, remapped. More...
 
AAC_FLOAT e_curr [7][48]
 Estimated envelope. More...
 
AAC_FLOAT q_m [7][48]
 Amplitude adjusted noise scalefactors. More...
 
AAC_FLOAT s_m [7][48]
 Sinusoidal levels. More...
 
AAC_FLOAT gain [7][48]
 
INTFLOAT qmf_filter_scratch [5][64]
 
FFTContext mdct_ana
 
FFTContext mdct
 
SBRDSPContext dsp
 
AACSBRContext c
 
Variables associated with bs_header_extra_2
unsigned bs_limiter_bands
 
unsigned bs_limiter_gains
 
unsigned bs_interpol_freq
 
unsigned bs_smoothing_mode
 

Detailed Description

Spectral Band Replication.

Definition at line 139 of file sbr.h.

Field Documentation

int SpectralBandReplication::sample_rate

Definition at line 140 of file sbr.h.

Referenced by sbr_hf_calc_npatches(), and sbr_make_f_master().

int SpectralBandReplication::start

Definition at line 141 of file sbr.h.

Referenced by read_sbr_header(), and sbr_turnoff().

int SpectralBandReplication::ready_for_dequant

Definition at line 142 of file sbr.h.

Referenced by read_sbr_data(), read_sbr_header(), and sbr_turnoff().

int SpectralBandReplication::id_aac

Definition at line 143 of file sbr.h.

Referenced by read_sbr_data().

int SpectralBandReplication::reset

Definition at line 144 of file sbr.h.

Referenced by read_sbr_header(), and sbr_hf_assemble().

SpectrumParameters SpectralBandReplication::spectrum_params

Definition at line 145 of file sbr.h.

Referenced by read_sbr_header(), sbr_make_f_derived(), sbr_make_f_master(), sbr_reset(), and sbr_turnoff().

int SpectralBandReplication::bs_amp_res_header

Definition at line 146 of file sbr.h.

Referenced by read_sbr_grid(), and read_sbr_header().

unsigned SpectralBandReplication::bs_limiter_bands

Definition at line 151 of file sbr.h.

Referenced by read_sbr_header(), and sbr_make_f_tablelim().

unsigned SpectralBandReplication::bs_limiter_gains

Definition at line 152 of file sbr.h.

Referenced by read_sbr_header(), and sbr_gain_calc().

unsigned SpectralBandReplication::bs_interpol_freq

Definition at line 153 of file sbr.h.

Referenced by read_sbr_header(), and sbr_env_estimate().

unsigned SpectralBandReplication::bs_smoothing_mode

Definition at line 154 of file sbr.h.

Referenced by read_sbr_header(), and sbr_hf_assemble().

unsigned SpectralBandReplication::bs_coupling
AAC_SIGNE SpectralBandReplication::k[5]

k0, k1, k2

Definition at line 157 of file sbr.h.

Referenced by sbr_hf_calc_npatches(), sbr_make_f_derived(), and sbr_make_f_master().

AAC_SIGNE SpectralBandReplication::kx[2]

kx', and kx respectively, kx is the first QMF subband where SBR is used.

kx' is its value from the previous frame

Definition at line 160 of file sbr.h.

Referenced by sbr_env_estimate(), sbr_gain_calc(), sbr_hf_assemble(), sbr_hf_calc_npatches(), sbr_hf_gen(), sbr_lf_gen(), sbr_make_f_derived(), sbr_make_f_tablelim(), sbr_mapping(), sbr_turnoff(), and sbr_x_gen().

AAC_SIGNE SpectralBandReplication::m[2]

M' and M respectively, M is the number of QMF subbands that use SBR.

Definition at line 162 of file sbr.h.

Referenced by sbr_env_estimate(), sbr_hf_assemble(), sbr_hf_calc_npatches(), sbr_hf_gen(), sbr_make_f_derived(), sbr_turnoff(), and sbr_x_gen().

unsigned SpectralBandReplication::kx_and_m_pushed

Definition at line 163 of file sbr.h.

AAC_SIGNE SpectralBandReplication::n_master

The number of frequency bands in f_master.

Definition at line 165 of file sbr.h.

Referenced by sbr_hf_calc_npatches(), sbr_make_f_derived(), and sbr_make_f_master().

SBRData SpectralBandReplication::data[2]
PSContext SpectralBandReplication::ps

Definition at line 167 of file sbr.h.

Referenced by read_sbr_extension().

AAC_SIGNE SpectralBandReplication::n[2]

N_Low and N_High respectively, the number of frequency bands for low and high resolution.

Definition at line 169 of file sbr.h.

Referenced by read_sbr_channel_pair_element(), read_sbr_envelope(), read_sbr_single_channel_element(), sbr_dequant(), sbr_env_estimate(), sbr_make_f_derived(), sbr_make_f_tablelim(), and sbr_mapping().

AAC_SIGNE SpectralBandReplication::n_q

Number of noise floor bands.

Definition at line 171 of file sbr.h.

Referenced by read_sbr_invf(), read_sbr_noise(), sbr_chirp(), sbr_dequant(), sbr_make_f_derived(), and sbr_mapping().

AAC_SIGNE SpectralBandReplication::n_lim

Number of limiter bands.

Definition at line 173 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_make_f_tablelim().

uint16_t SpectralBandReplication::f_master[49]

The master QMF frequency grouping.

Definition at line 175 of file sbr.h.

Referenced by sbr_hf_calc_npatches(), sbr_make_f_derived(), and sbr_make_f_master().

uint16_t SpectralBandReplication::f_tablelow[25]

Frequency borders for low resolution SBR.

Definition at line 177 of file sbr.h.

Referenced by sbr_env_estimate(), sbr_make_f_derived(), sbr_make_f_tablelim(), and sbr_mapping().

uint16_t SpectralBandReplication::f_tablehigh[49]

Frequency borders for high resolution SBR.

Definition at line 179 of file sbr.h.

Referenced by sbr_env_estimate(), sbr_make_f_derived(), and sbr_mapping().

uint16_t SpectralBandReplication::f_tablenoise[6]

Frequency borders for noise floors.

Definition at line 181 of file sbr.h.

Referenced by sbr_hf_gen(), sbr_make_f_derived(), and sbr_mapping().

uint16_t SpectralBandReplication::f_tablelim[30]

Frequency borders for the limiter.

Definition at line 183 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_make_f_tablelim().

AAC_SIGNE SpectralBandReplication::num_patches

Definition at line 184 of file sbr.h.

Referenced by sbr_hf_calc_npatches(), sbr_hf_gen(), and sbr_make_f_tablelim().

uint8_t SpectralBandReplication::patch_num_subbands[6]

Definition at line 185 of file sbr.h.

Referenced by sbr_hf_calc_npatches(), sbr_hf_gen(), and sbr_make_f_tablelim().

uint8_t SpectralBandReplication::patch_start_subband[6]

Definition at line 186 of file sbr.h.

Referenced by sbr_hf_calc_npatches(), and sbr_hf_gen().

INTFLOAT SpectralBandReplication::X_low[32][40][2]

QMF low frequency input to the HF generator.

Definition at line 188 of file sbr.h.

INTFLOAT SpectralBandReplication::X_high[64][40][2]

QMF output of the HF generator.

Definition at line 190 of file sbr.h.

INTFLOAT SpectralBandReplication::X[2][2][38][64]

QMF values of the reconstructed signal.

Definition at line 192 of file sbr.h.

INTFLOAT SpectralBandReplication::alpha0[64][2]

Zeroth coefficient used to filter the subband signals.

Definition at line 194 of file sbr.h.

INTFLOAT SpectralBandReplication::alpha1[64][2]

First coefficient used to filter the subband signals.

Definition at line 196 of file sbr.h.

AAC_FLOAT SpectralBandReplication::e_origmapped[7][48]

Dequantized envelope scalefactors, remapped.

Definition at line 198 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_mapping().

AAC_FLOAT SpectralBandReplication::q_mapped[7][48]

Dequantized noise scalefactors, remapped.

Definition at line 200 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_mapping().

uint8_t SpectralBandReplication::s_mapped[7][48]

Sinusoidal presence, remapped.

Definition at line 202 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_mapping().

AAC_FLOAT SpectralBandReplication::e_curr[7][48]

Estimated envelope.

Definition at line 204 of file sbr.h.

Referenced by sbr_gain_calc().

AAC_FLOAT SpectralBandReplication::q_m[7][48]

Amplitude adjusted noise scalefactors.

Definition at line 206 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_hf_assemble().

AAC_FLOAT SpectralBandReplication::s_m[7][48]

Sinusoidal levels.

Definition at line 208 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_hf_assemble().

AAC_FLOAT SpectralBandReplication::gain[7][48]

Definition at line 209 of file sbr.h.

Referenced by sbr_gain_calc(), and sbr_hf_assemble().

INTFLOAT SpectralBandReplication::qmf_filter_scratch[5][64]

Definition at line 210 of file sbr.h.

FFTContext SpectralBandReplication::mdct_ana

Definition at line 211 of file sbr.h.

FFTContext SpectralBandReplication::mdct

Definition at line 212 of file sbr.h.

SBRDSPContext SpectralBandReplication::dsp

Definition at line 213 of file sbr.h.

Referenced by sbr_env_estimate(), sbr_hf_assemble(), and sbr_hf_gen().

AACSBRContext SpectralBandReplication::c

Definition at line 214 of file sbr.h.


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