FFmpeg: AACEncContext Struct Reference

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Data Fields

AACEncContext Struct Reference

AAC encoder context. More...

#include <aacenc.h>

Data Fields

AVClass * av_class

AACEncOptions options

encoding options More...

PutBitContext pb

AVTXContext * mdct1024

long (1024 samples) frame transform context More...

av_tx_fn mdct1024_fn

AVTXContext * mdct128

short (128 samples) frame transform context More...

av_tx_fn mdct128_fn

AVFloatDSPContext * fdsp

AACPCEInfo pce

PCE data, if needed. More...

float * planar_samples [16]

saved preprocessed input More...

int profile

copied from avctx More...

int needs_pce

flag for non-standard layout More...

LPCContext lpc

used by TNS More...

int samplerate_index

MPEG-4 samplerate index. More...

int channels

channel count More...

const uint8_t * reorder_map

lavc to aac reorder map More...

const uint8_t * chan_map

channel configuration map More...

ChannelElement * cpe

channel elements More...

FFPsyContext psy

struct FFPsyPreprocessContext * psypp

const AACCoefficientsEncoder * coder

int cur_channel

current channel for coder context More...

int random_state

float lambda

int last_frame_pb_count

number of bits for the previous frame More...

float lambda_sum

sum(lambda), for Qvg reporting More...

int lambda_count

count(lambda), for Qvg reporting More...

enum RawDataBlockType cur_type

channel group type cur_channel belongs to More...

AudioFrameQueue afq

int qcoefs [96]

quantized coefficients More...

float scoefs [1024]

scaled coefficients More...

uint16_t quantize_band_cost_cache_generation

AACQuantizeBandCostCacheEntry quantize_band_cost_cache [256][128]

memoization area for quantize_band_cost More...

AACEncDSPContext aacdsp

struct {

float * samples

} buffer

Detailed Description

AAC encoder context.

Definition at line 212 of file aacenc.h.

Field Documentation

◆ av_class

AVClass* AACEncContext::av_class

Definition at line 213 of file aacenc.h.

◆ options

AACEncOptions AACEncContext::options

encoding options

Definition at line 214 of file aacenc.h.

◆ pb

PutBitContext AACEncContext::pb

Definition at line 215 of file aacenc.h.

Referenced by ff_quantize_and_encode_band_cost(), quantize_and_encode_band(), and quantize_and_encode_band_cost_template().

◆ mdct1024

AVTXContext* AACEncContext::mdct1024

long (1024 samples) frame transform context

Definition at line 216 of file aacenc.h.

◆ mdct1024_fn

av_tx_fn AACEncContext::mdct1024_fn

Definition at line 217 of file aacenc.h.

◆ mdct128

AVTXContext* AACEncContext::mdct128

short (128 samples) frame transform context

Definition at line 218 of file aacenc.h.

◆ mdct128_fn

av_tx_fn AACEncContext::mdct128_fn

Definition at line 219 of file aacenc.h.

◆ fdsp

AVFloatDSPContext* AACEncContext::fdsp

Definition at line 220 of file aacenc.h.

◆ pce

AACPCEInfo AACEncContext::pce

PCE data, if needed.

Definition at line 221 of file aacenc.h.

◆ planar_samples

float* AACEncContext::planar_samples[16]

saved preprocessed input

Definition at line 222 of file aacenc.h.

◆ profile

int AACEncContext::profile

copied from avctx

Definition at line 224 of file aacenc.h.

◆ needs_pce

int AACEncContext::needs_pce

flag for non-standard layout

Definition at line 225 of file aacenc.h.

◆ lpc

LPCContext AACEncContext::lpc

used by TNS

Definition at line 226 of file aacenc.h.

◆ samplerate_index

int AACEncContext::samplerate_index

MPEG-4 samplerate index.

Definition at line 227 of file aacenc.h.

◆ channels

int AACEncContext::channels

channel count

Definition at line 228 of file aacenc.h.

◆ reorder_map

const uint8_t* AACEncContext::reorder_map

lavc to aac reorder map

Definition at line 229 of file aacenc.h.

◆ chan_map

const uint8_t* AACEncContext::chan_map

channel configuration map

Definition at line 230 of file aacenc.h.

◆ cpe

ChannelElement* AACEncContext::cpe

channel elements

Definition at line 232 of file aacenc.h.

◆ psy

FFPsyContext AACEncContext::psy

Definition at line 233 of file aacenc.h.

◆ psypp

struct FFPsyPreprocessContext* AACEncContext::psypp

Definition at line 234 of file aacenc.h.

◆ coder

const AACCoefficientsEncoder* AACEncContext::coder

Definition at line 235 of file aacenc.h.

◆ cur_channel

int AACEncContext::cur_channel

current channel for coder context

Definition at line 236 of file aacenc.h.

◆ random_state

int AACEncContext::random_state

Definition at line 237 of file aacenc.h.

◆ lambda

float AACEncContext::lambda

Definition at line 238 of file aacenc.h.

Referenced by ff_quantize_and_encode_band_cost(), quantize_and_encode_band(), and quantize_and_encode_band_cost_template().

◆ last_frame_pb_count

int AACEncContext::last_frame_pb_count

number of bits for the previous frame

Definition at line 239 of file aacenc.h.

◆ lambda_sum

float AACEncContext::lambda_sum

sum(lambda), for Qvg reporting

Definition at line 240 of file aacenc.h.

◆ lambda_count

int AACEncContext::lambda_count

count(lambda), for Qvg reporting

Definition at line 241 of file aacenc.h.

◆ cur_type

enum RawDataBlockType AACEncContext::cur_type

channel group type cur_channel belongs to

Definition at line 242 of file aacenc.h.

◆ afq

AudioFrameQueue AACEncContext::afq

Definition at line 244 of file aacenc.h.

◆ qcoefs

int AACEncContext::qcoefs[96]

quantized coefficients

Definition at line 245 of file aacenc.h.

◆ scoefs

float AACEncContext::scoefs[1024]

scaled coefficients

Definition at line 246 of file aacenc.h.

◆ quantize_band_cost_cache_generation

uint16_t AACEncContext::quantize_band_cost_cache_generation

Definition at line 248 of file aacenc.h.

◆ quantize_band_cost_cache

AACQuantizeBandCostCacheEntry AACEncContext::quantize_band_cost_cache[256][128]

memoization area for quantize_band_cost

Definition at line 249 of file aacenc.h.

◆ aacdsp

AACEncDSPContext AACEncContext::aacdsp

Definition at line 251 of file aacenc.h.

◆ samples

float* AACEncContext::samples

Definition at line 254 of file aacenc.h.

◆ buffer

struct { ... } AACEncContext::buffer

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

libavcodec/aacenc.h

Generated on Fri Aug 22 2025 14:00:18 for FFmpeg by doxygen 1.8.17