FFmpeg: Atrac3pChanUnitCtx Struct Reference

FFmpeg 4.0

Channel unit parameters. More...

#include <libavcodec/atrac3plus.h>

Data Fields
int	unit_type
	unit type (mono/stereo) More...

int	num_quant_units

int	num_subbands

int	used_quant_units
	number of quant units with coded spectrum More...

int	num_coded_subbands
	number of subbands with coded spectrum More...

int	mute_flag
	mute flag More...

int	use_full_table
	1 - full table list, 0 - restricted one More...

int	noise_present
	1 - global noise info present More...

int	noise_level_index
	global noise level index More...

int	noise_table_index
	global noise RNG table index More...

uint8_t	swap_channels [ATRAC3P_SUBBANDS]
	1 - perform subband-wise channel swapping More...

uint8_t	negate_coeffs [ATRAC3P_SUBBANDS]
	1 - subband-wise IMDCT coefficients negation More...

Atrac3pChanParams	channels [2]

Atrac3pWaveSynthParams	wave_synth_hist [2]
	waves synth history for two frames More...

Atrac3pWaveSynthParams *	waves_info

Atrac3pWaveSynthParams *	waves_info_prev

Atrac3pIPQFChannelCtx	ipqf_ctx [2]

float	prev_buf [2][ATRAC3P_FRAME_SAMPLES]
	overlapping buffer More...

Detailed Description

Channel unit parameters.

Definition at line 131 of file atrac3plus.h.

Field Documentation

◆ unit_type

int Atrac3pChanUnitCtx::unit_type

unit type (mono/stereo)

Definition at line 133 of file atrac3plus.h.

Referenced by atrac3p_decode_frame(), decode_residual_spectrum(), and ff_atrac3p_power_compensation().

◆ num_quant_units

int Atrac3pChanUnitCtx::num_quant_units

Definition at line 134 of file atrac3plus.h.

Referenced by add_wordlen_weights(), decode_channel_wordlen(), decode_quant_wordlen(), ff_atrac3p_decode_channel_unit(), and num_coded_units().

◆ num_subbands

int Atrac3pChanUnitCtx::num_subbands

Definition at line 135 of file atrac3plus.h.

Referenced by decode_window_shape(), ff_atrac3p_decode_channel_unit(), and reconstruct_frame().

◆ used_quant_units

int Atrac3pChanUnitCtx::used_quant_units

number of quant units with coded spectrum

Definition at line 136 of file atrac3plus.h.

Referenced by decode_channel_sf_idx(), decode_code_table_indexes(), decode_quant_wordlen(), decode_residual_spectrum(), decode_scale_factors(), decode_spectrum(), ff_atrac3p_decode_channel_unit(), get_num_ct_values(), and subtract_sf_weights().

◆ num_coded_subbands

int Atrac3pChanUnitCtx::num_coded_subbands

number of subbands with coded spectrum

Definition at line 137 of file atrac3plus.h.

Referenced by decode_residual_spectrum(), decode_spectrum(), and ff_atrac3p_decode_channel_unit().

◆ mute_flag

int Atrac3pChanUnitCtx::mute_flag

mute flag

Definition at line 138 of file atrac3plus.h.

Referenced by decode_residual_spectrum(), and ff_atrac3p_decode_channel_unit().

◆ use_full_table

int Atrac3pChanUnitCtx::use_full_table

1 - full table list, 0 - restricted one

Definition at line 139 of file atrac3plus.h.

Referenced by decode_channel_code_tab(), decode_code_table_indexes(), and decode_spectrum().

◆ noise_present

int Atrac3pChanUnitCtx::noise_present

1 - global noise info present

Definition at line 140 of file atrac3plus.h.

Referenced by ff_atrac3p_decode_channel_unit().

◆ noise_level_index

int Atrac3pChanUnitCtx::noise_level_index

global noise level index

Definition at line 141 of file atrac3plus.h.

Referenced by ff_atrac3p_decode_channel_unit().

◆ noise_table_index

int Atrac3pChanUnitCtx::noise_table_index

global noise RNG table index

Definition at line 142 of file atrac3plus.h.

Referenced by ff_atrac3p_decode_channel_unit().

◆ swap_channels

uint8_t Atrac3pChanUnitCtx::swap_channels[ATRAC3P_SUBBANDS]

1 - perform subband-wise channel swapping

Definition at line 143 of file atrac3plus.h.

Referenced by decode_residual_spectrum(), ff_atrac3p_decode_channel_unit(), and ff_atrac3p_power_compensation().

◆ negate_coeffs

uint8_t Atrac3pChanUnitCtx::negate_coeffs[ATRAC3P_SUBBANDS]

1 - subband-wise IMDCT coefficients negation

Definition at line 144 of file atrac3plus.h.

Referenced by decode_residual_spectrum(), and ff_atrac3p_decode_channel_unit().

◆ channels

◆ wave_synth_hist

Atrac3pWaveSynthParams Atrac3pChanUnitCtx::wave_synth_hist[2]

waves synth history for two frames

Definition at line 148 of file atrac3plus.h.

Referenced by atrac3p_decode_init().

◆ waves_info

Atrac3pWaveSynthParams* Atrac3pChanUnitCtx::waves_info

Definition at line 149 of file atrac3plus.h.

Referenced by atrac3p_decode_init(), decode_band_numwavs(), decode_tones_amplitude(), decode_tones_envelope(), decode_tones_frequency(), decode_tones_info(), decode_tones_phase(), ff_atrac3p_generate_tones(), and reconstruct_frame().

◆ waves_info_prev

Atrac3pWaveSynthParams* Atrac3pChanUnitCtx::waves_info_prev

Definition at line 150 of file atrac3plus.h.

Referenced by atrac3p_decode_init(), ff_atrac3p_generate_tones(), and reconstruct_frame().

◆ ipqf_ctx

Atrac3pIPQFChannelCtx Atrac3pChanUnitCtx::ipqf_ctx[2]

Definition at line 152 of file atrac3plus.h.

Referenced by reconstruct_frame().

◆ prev_buf

float Atrac3pChanUnitCtx::prev_buf[2][ATRAC3P_FRAME_SAMPLES]

overlapping buffer

Definition at line 153 of file atrac3plus.h.

Referenced by reconstruct_frame().

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

libavcodec/atrac3plus.h