AacPsyChannel Struct Reference

single/pair channel context for psychoacoustic model More...

Data Fields
AacPsyBand	band [128]
	bands information
AacPsyBand	prev_band [128]
	bands information from the previous frame
float	win_energy
	sliding average of channel energy
float	iir_state [2]
	hi-pass IIR filter state
uint8_t	next_grouping
	stored grouping scheme for the next frame (in case of 8 short window sequence)
enum WindowSequence	next_window_seq
	window sequence to be used in the next frame
float	attack_threshold
	attack threshold for this channel
float	prev_energy_subshort [AAC_NUM_BLOCKS_SHORT *PSY_LAME_NUM_SUBBLOCKS]
int	prev_attack
	attack value for the last short block in the previous sequence

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Detailed Description

single/pair channel context for psychoacoustic model

Definition at line 117 of file aacpsy.c.

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Field Documentation

float AacPsyChannel::attack_threshold

attack threshold for this channel

Definition at line 126 of file aacpsy.c.

Referenced by lame_window_init().

AacPsyBand AacPsyChannel::band[128]

bands information

Definition at line 118 of file aacpsy.c.

float AacPsyChannel::iir_state[2]

hi-pass IIR filter state

Definition at line 122 of file aacpsy.c.

uint8_t AacPsyChannel::next_grouping

stored grouping scheme for the next frame (in case of 8 short window sequence)

Definition at line 123 of file aacpsy.c.

enum WindowSequence AacPsyChannel::next_window_seq

window sequence to be used in the next frame

Definition at line 124 of file aacpsy.c.

Referenced by lame_apply_block_type(), and psy_3gpp_window().

int AacPsyChannel::prev_attack

attack value for the last short block in the previous sequence

Definition at line 128 of file aacpsy.c.

AacPsyBand AacPsyChannel::prev_band[128]

bands information from the previous frame

Definition at line 119 of file aacpsy.c.

float AacPsyChannel::prev_energy_subshort[AAC_NUM_BLOCKS_SHORT *PSY_LAME_NUM_SUBBLOCKS]

Definition at line 127 of file aacpsy.c.

Referenced by lame_window_init().

float AacPsyChannel::win_energy

sliding average of channel energy

Definition at line 121 of file aacpsy.c.

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

• libavcodec/aacpsy.c