Single Channel Element - used for both SCE and LFE elements. More...

#include <aacdec.h>

Public Member Functions
	INTFLOAT_UNION (sf, [128])
	scalefactors (8 windows * 16 sfb max) More...

	INTFLOAT_ALIGNED_UNION (32, coeffs, 1024)
	coefficients for IMDCT, maybe processed More...

	INTFLOAT_ALIGNED_UNION (32, prev_coeffs, 1024)
	unscaled previous contents of coeffs[] for USAC More...

	INTFLOAT_ALIGNED_UNION (32, saved, 1536)
	overlap More...

	INTFLOAT_ALIGNED_UNION (32, ret_buf, 2048)
	PCM output buffer. More...

	INTFLOAT_ALIGNED_UNION (16, ltp_state, 3072)
	time signal for LTP More...

Data Fields
IndividualChannelStream	ics

AACUsacElemData	ue
	USAC element data. More...

TemporalNoiseShaping	tns

enum BandType	band_type [128]
	band types More...

int	sfo [128]
	scalefactor offsets More...

union {
struct PredictorState * predictor_state

};

union {
float * output
	PCM output. More...

};

Pulse	pulse

enum BandType	band_alt [128]
	alternative band type More...

int	sf_idx [128]
	scalefactor indices More...

uint8_t	zeroes [128]
	band is not coded More...

uint8_t	can_pns [128]
	band is allowed to PNS (informative) More...

float	is_ener [128]
	Intensity stereo pos. More...

float	pns_ener [128]
	Noise energy values. More...

float	pcoeffs [1024]
	coefficients for IMDCT, pristine More...

float	coeffs [1024]
	coefficients for IMDCT, maybe processed More...

float	ret_buf [2048]
	PCM output buffer. More...

float	ltp_state [3072]
	time signal for LTP More...

float	lcoeffs [1024]
	MDCT of LTP coefficients. More...

float	prcoeffs [1024]
	Main prediction coefs. More...

PredictorState	predictor_state [MAX_PREDICTORS]

Detailed Description

Single Channel Element - used for both SCE and LFE elements.

Definition at line 210 of file aacdec.h.

Member Function Documentation

◆ INTFLOAT_UNION()

SingleChannelElement::INTFLOAT_UNION ( sf )

scalefactors (8 windows * 16 sfb max)

◆ INTFLOAT_ALIGNED_UNION() [1/5]

SingleChannelElement::INTFLOAT_ALIGNED_UNION	(	32	,
		coeffs	,
		1024
	)

coefficients for IMDCT, maybe processed

◆ INTFLOAT_ALIGNED_UNION() [2/5]

SingleChannelElement::INTFLOAT_ALIGNED_UNION	(	32	,
		prev_coeffs	,
		1024
	)

unscaled previous contents of coeffs[] for USAC

◆ INTFLOAT_ALIGNED_UNION() [3/5]

SingleChannelElement::INTFLOAT_ALIGNED_UNION	(	32	,
		saved	,
		1536
	)

overlap

◆ INTFLOAT_ALIGNED_UNION() [4/5]

SingleChannelElement::INTFLOAT_ALIGNED_UNION	(	32	,
		ret_buf	,
		2048
	)

PCM output buffer.

◆ INTFLOAT_ALIGNED_UNION() [5/5]

SingleChannelElement::INTFLOAT_ALIGNED_UNION	(	16	,
		ltp_state	,
		3072
	)

time signal for LTP

Field Documentation

◆ ics

IndividualChannelStream SingleChannelElement::ics

Definition at line 211 of file aacdec.h.

Referenced by aac_encode_frame(), adjust_frame_information(), apply_complex_stereo(), apply_intensity_stereo(), apply_mid_side_stereo(), apply_noise_fill(), apply_window_and_mdct(), avoid_clipping(), codebook_trellis_rate(), complex_stereo_downmix_cur(), complex_stereo_downmix_prev(), complex_stereo_get_filter(), decode_band_types(), decode_cce(), decode_cpe(), decode_gain_control(), decode_mid_side_stereo(), decode_scalefactors(), decode_usac_core_coder(), decode_usac_scale_factors(), decode_usac_stereo_cplx(), decode_usac_stereo_info(), encode_band_info(), encode_individual_channel(), encode_ms_info(), encode_scale_factors(), encode_spectral_coeffs(), encode_window_bands_info(), ff_aac_adjust_common_ltp(), ff_aac_adjust_common_pred(), ff_aac_apply_main_pred(), ff_aac_apply_tns(), ff_aac_decode_ics(), ff_aac_encode_ltp_info(), ff_aac_encode_main_pred(), ff_aac_encode_tns_info(), ff_aac_is_encoding_err(), ff_aac_ltp_insert_new_frame(), ff_aac_search_for_is(), ff_aac_search_for_ltp(), ff_aac_search_for_pred(), ff_aac_search_for_tns(), ff_aac_update_ltp(), ff_init_nextband_map(), mark_pns(), search_for_ms(), search_for_pns(), search_for_quantizers_anmr(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), set_special_band_scalefactors(), setup_sce(), spectral_to_sample(), spectrum_decode(), spectrum_scale(), and update_pred_resets().

◆ ue

AACUsacElemData SingleChannelElement::ue

USAC element data.

Definition at line 212 of file aacdec.h.

Referenced by apply_noise_fill(), decode_usac_core_coder(), decode_usac_stereo_info(), ff_aac_usac_reset_state(), setup_sce(), and spectrum_decode().

◆ tns

TemporalNoiseShaping SingleChannelElement::tns

Definition at line 213 of file aacdec.h.

Referenced by aac_encode_frame(), decode_usac_core_coder(), decode_usac_stereo_info(), encode_individual_channel(), ff_aac_apply_tns(), ff_aac_decode_ics(), ff_aac_encode_tns_info(), ff_aac_search_for_tns(), spectral_to_sample(), and spectrum_decode().

◆ band_type

enum BandType SingleChannelElement::band_type

◆ sfo

int SingleChannelElement::sfo[128]

scalefactor offsets

Definition at line 215 of file aacdec.h.

Referenced by apply_noise_fill(), decode_scalefactors(), and decode_usac_scale_factors().

◆ predictor_state [1/2]

struct PredictorState* SingleChannelElement::predictor_state

Definition at line 224 of file aacdec.h.

Referenced by ff_aac_apply_main_pred(), ff_aac_search_for_pred(), and reset_predictor_group().

◆ @18

union { ... }

◆ output

float* SingleChannelElement::output

PCM output.

Definition at line 227 of file aacdec.h.

Referenced by decode_usac_core_coder(), frame_configure_elements(), and spectral_to_sample().

◆ @20

union { ... }

◆ pulse

Pulse SingleChannelElement::pulse

Definition at line 130 of file aacenc.h.

Referenced by adjust_frame_information(), and encode_individual_channel().

◆ band_alt

enum BandType SingleChannelElement::band_alt[128]

alternative band type

Definition at line 132 of file aacenc.h.

Referenced by ff_aac_search_for_pred(), mark_pns(), and search_for_pns().

◆ sf_idx

int SingleChannelElement::sf_idx[128]

scalefactor indices

Definition at line 133 of file aacenc.h.

Referenced by codebook_trellis_rate(), encode_individual_channel(), encode_scale_factors(), encode_spectral_coeffs(), encode_window_bands_info(), ff_aac_is_encoding_err(), ff_aac_search_for_is(), ff_aac_search_for_ltp(), ff_aac_search_for_pred(), ff_sfdelta_can_remove_band(), ff_sfdelta_can_replace(), search_for_ms(), search_for_pns(), search_for_quantizers_anmr(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), and set_special_band_scalefactors().

◆ zeroes

uint8_t SingleChannelElement::zeroes[128]

band is not coded

Definition at line 134 of file aacenc.h.

Referenced by adjust_frame_information(), codebook_trellis_rate(), encode_scale_factors(), encode_spectral_coeffs(), encode_window_bands_info(), ff_aac_search_for_is(), ff_aac_search_for_pred(), ff_init_nextband_map(), ff_pns_bits(), search_for_ms(), search_for_pns(), search_for_quantizers_anmr(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), and set_special_band_scalefactors().

◆ can_pns

uint8_t SingleChannelElement::can_pns[128]

band is allowed to PNS (informative)

Definition at line 135 of file aacenc.h.

Referenced by ff_pns_bits(), mark_pns(), and search_for_quantizers_twoloop().

◆ is_ener

float SingleChannelElement::is_ener[128]

Intensity stereo pos.

Definition at line 136 of file aacenc.h.

Referenced by apply_intensity_stereo(), ff_aac_search_for_is(), and set_special_band_scalefactors().

◆ pns_ener

float SingleChannelElement::pns_ener[128]

Noise energy values.

Definition at line 137 of file aacenc.h.

Referenced by mark_pns(), search_for_pns(), and set_special_band_scalefactors().

◆ pcoeffs

float SingleChannelElement::pcoeffs[1024]

coefficients for IMDCT, pristine

Definition at line 138 of file aacenc.h.

Referenced by aac_encode_frame(), apply_window_and_mdct(), ff_aac_adjust_common_pred(), ff_aac_apply_tns(), and ff_aac_is_encoding_err().

◆ coeffs

float SingleChannelElement::coeffs[1024]

◆ ret_buf

float SingleChannelElement::ret_buf[2048]

PCM output buffer.

Definition at line 140 of file aacenc.h.

Referenced by aac_encode_frame(), apply_window_and_mdct(), ff_aac_ltp_insert_new_frame(), and frame_configure_elements().

◆ ltp_state

float SingleChannelElement::ltp_state[3072]

time signal for LTP

Definition at line 141 of file aacenc.h.

Referenced by aac_encode_frame(), ff_aac_ltp_insert_new_frame(), ff_aac_search_for_ltp(), and ff_aac_update_ltp().

◆ lcoeffs

float SingleChannelElement::lcoeffs[1024]

MDCT of LTP coefficients.

Definition at line 142 of file aacenc.h.

Referenced by aac_encode_frame(), and ff_aac_search_for_ltp().

◆ prcoeffs

float SingleChannelElement::prcoeffs[1024]

Main prediction coefs.

Definition at line 143 of file aacenc.h.

Referenced by ff_aac_apply_main_pred(), and ff_aac_search_for_pred().

◆ predictor_state [2/2]

PredictorState SingleChannelElement::predictor_state[MAX_PREDICTORS]

Definition at line 144 of file aacenc.h.

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

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

Public Member Functions

Data Fields