FFmpeg
Loading...
Searching...
No Matches
Data Structures | Macros | Typedefs | Functions | Variables
aaccoder.c File Reference

AAC coefficients encoder. More...

#include <math.h>
#include <float.h>
#include "libavutil/mathematics.h"
#include "mathops.h"
#include "avcodec.h"
#include "put_bits.h"
#include "aac.h"
#include "aacenc.h"
#include "aactab.h"
#include "aacenctab.h"
#include "aacenc_utils.h"
#include "aacenc_quantization.h"
#include "aacenc_is.h"
#include "aacenc_tns.h"
#include "libavcodec/aaccoder_twoloop.h"
#include "libavcodec/aaccoder_trellis.h"
#include "libavcodec/aaccoder_nmr.h"

Go to the source code of this file.

Data Structures

struct  BandCodingPath
 structure used in optimal codebook search More...
 
struct  TrellisPath
 

Macros

#define NOISE_SPREAD_THRESHOLD   0.9f
 
#define NOISE_LAMBDA_REPLACE   1.948f
 
#define QUANTIZE_AND_ENCODE_BAND_COST_FUNC(NAME, BT_ZERO, BT_UNSIGNED, BT_PAIR, BT_ESC, BT_NOISE, BT_STEREO, ROUNDING)
 
#define TRELLIS_STAGES   121
 
#define TRELLIS_STATES   (SCALE_MAX_DIFF+1)
 

Typedefs

typedef float(* quantize_and_encode_band_func) (struct AACEncContext *s, PutBitContext *pb, const float *in, float *quant, const float *scaled, int size, int scale_idx, int cb, const float lambda, const float uplim, int *bits, float *energy)
 

Functions

av_cold void ff_aac_coder_init_tables (void)
 
static av_always_inline float quantize_and_encode_band_cost_template (struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, const float *scaled, int size, int scale_idx, int cb, const float lambda, const float uplim, int *bits, float *energy, int BT_ZERO, int BT_UNSIGNED, int BT_PAIR, int BT_ESC, int BT_NOISE, int BT_STEREO, const float ROUNDING)
 Calculate rate distortion cost for quantizing with given codebook.
 
static float quantize_and_encode_band_cost_NONE (struct AACEncContext *s, PutBitContext *pb, const float *in, float *quant, const float *scaled, int size, int scale_idx, int cb, const float lambda, const float uplim, int *bits, float *energy)
 
float ff_quantize_and_encode_band_cost (struct AACEncContext *s, PutBitContext *pb, const float *in, float *quant, const float *scaled, int size, int scale_idx, int cb, const float lambda, const float uplim, int *bits, float *energy)
 
static void quantize_and_encode_band (struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, int size, int scale_idx, int cb, const float lambda, int rtz)
 
static void set_special_band_scalefactors (AACEncContext *s, SingleChannelElement *sce)
 
static void search_for_quantizers_fast (AVCodecContext *avctx, AACEncContext *s, SingleChannelElement *sce, const float lambda)
 
static void search_for_pns (AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce)
 
static void mark_pns (AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce)
 
static void search_for_ms (AACEncContext *s, ChannelElement *cpe)
 

Variables

static float esc_pow43 [1<< 13]
 
static const quantize_and_encode_band_func quantize_and_encode_band_cost_arr []
 
static const quantize_and_encode_band_func quantize_and_encode_band_cost_rtz_arr []
 
const AACCoefficientsEncoder ff_aac_coders [AAC_CODER_NB]
 

Detailed Description

AAC coefficients encoder.

Definition in file aaccoder.c.

Macro Definition Documentation

◆ NOISE_SPREAD_THRESHOLD

#define NOISE_SPREAD_THRESHOLD   0.9f

Definition at line 55 of file aaccoder.c.

Referenced by mark_pns(), and search_for_pns().

◆ NOISE_LAMBDA_REPLACE

#define NOISE_LAMBDA_REPLACE   1.948f

Definition at line 59 of file aaccoder.c.

Referenced by search_for_pns().

◆ QUANTIZE_AND_ENCODE_BAND_COST_FUNC

#define QUANTIZE_AND_ENCODE_BAND_COST_FUNC ( NAME,
BT_ZERO,
BT_UNSIGNED,
BT_PAIR,
BT_ESC,
BT_NOISE,
BT_STEREO,
ROUNDING )
Value:
static float quantize_and_encode_band_cost_ ## NAME( \
struct AACEncContext *s, \
PutBitContext *pb, const float *in, float *quant, \
const float *scaled, int size, int scale_idx, \
int cb, const float lambda, const float uplim, \
int *bits, float *energy) { \
return quantize_and_encode_band_cost_template( \
s, pb, in, quant, scaled, size, scale_idx, \
BT_ESC ? ESC_BT : cb, lambda, uplim, bits, energy, \
BT_ZERO, BT_UNSIGNED, BT_PAIR, BT_ESC, BT_NOISE, BT_STEREO, \
ROUNDING); \
}
ESC_BT
@ ESC_BT
Spectral data are coded with an escape sequence.
Definition aac.h:73
quantize_and_encode_band_cost_template
static av_always_inline float quantize_and_encode_band_cost_template(struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, const float *scaled, int size, int scale_idx, int cb, const float lambda, const float uplim, int *bits, float *energy, int BT_ZERO, int BT_UNSIGNED, int BT_PAIR, int BT_ESC, int BT_NOISE, int BT_STEREO, const float ROUNDING)
Calculate rate distortion cost for quantizing with given codebook.
Definition aaccoder.c:84
s
#define s(width, name)
Definition cbs_vp9.c:198
bits
static const uint8_t bits[8]
Definition fastaudio.c:100
AACEncContext
AAC encoder context.
Definition aacenc.h:281
size
int size
Definition twinvq_data.h:10344
cb
static double cb(void *priv, double x, double y)
Definition vf_geq.c:247
quant
static const uint8_t quant[64]
Definition vmixdec.c:71

Definition at line 213 of file aaccoder.c.

◆ TRELLIS_STAGES

#define TRELLIS_STAGES   121

Definition at line 310 of file aaccoder.c.

◆ TRELLIS_STATES

#define TRELLIS_STATES   (SCALE_MAX_DIFF+1)

Definition at line 311 of file aaccoder.c.

Typedef Documentation

◆ quantize_and_encode_band_func

typedef float(* quantize_and_encode_band_func) (struct AACEncContext *s, PutBitContext *pb, const float *in, float *quant, const float *scaled, int size, int scale_idx, int cb, const float lambda, const float uplim, int *bits, float *energy)

Definition at line 73 of file aaccoder.c.

Function Documentation

◆ ff_aac_coder_init_tables()

av_cold void ff_aac_coder_init_tables ( void )

Definition at line 67 of file aaccoder.c.

Referenced by aac_encode_init().

◆ quantize_and_encode_band_cost_template()

static av_always_inline float quantize_and_encode_band_cost_template ( struct AACEncContext * s,
PutBitContext * pb,
const float * in,
float * out,
const float * scaled,
int size,
int scale_idx,
int cb,
const float lambda,
const float uplim,
int * bits,
float * energy,
int BT_ZERO,
int BT_UNSIGNED,
int BT_PAIR,
int BT_ESC,
int BT_NOISE,
int BT_STEREO,
const float ROUNDING )
static

Calculate rate distortion cost for quantizing with given codebook.

Returns
quantization distortion

Definition at line 84 of file aaccoder.c.

◆ quantize_and_encode_band_cost_NONE()

static float quantize_and_encode_band_cost_NONE ( struct AACEncContext * s,
PutBitContext * pb,
const float * in,
float * quant,
const float * scaled,
int size,
int scale_idx,
int cb,
const float lambda,
const float uplim,
int * bits,
float * energy )
inlinestatic

Definition at line 204 of file aaccoder.c.

◆ ff_quantize_and_encode_band_cost()

float ff_quantize_and_encode_band_cost ( struct AACEncContext * s,
PutBitContext * pb,
const float * in,
float * quant,
const float * scaled,
int size,
int scale_idx,
int cb,
const float lambda,
const float uplim,
int * bits,
float * energy )

Definition at line 277 of file aaccoder.c.

Referenced by quantize_band_cost(), and quantize_band_cost_bits().

◆ quantize_and_encode_band()

static void quantize_and_encode_band ( struct AACEncContext * s,
PutBitContext * pb,
const float * in,
float * out,
int size,
int scale_idx,
int cb,
const float lambda,
int rtz )
inlinestatic

Definition at line 288 of file aaccoder.c.

◆ set_special_band_scalefactors()

static void set_special_band_scalefactors ( AACEncContext * s,
SingleChannelElement * sce )
static

Definition at line 313 of file aaccoder.c.

◆ search_for_quantizers_fast()

static void search_for_quantizers_fast ( AVCodecContext * avctx,
AACEncContext * s,
SingleChannelElement * sce,
const float lambda )
static

Definition at line 352 of file aaccoder.c.

◆ search_for_pns()

static void search_for_pns ( AACEncContext * s,
AVCodecContext * avctx,
SingleChannelElement * sce )
static

Definition at line 499 of file aaccoder.c.

◆ mark_pns()

static void mark_pns ( AACEncContext * s,
AVCodecContext * avctx,
SingleChannelElement * sce )
static

Definition at line 628 of file aaccoder.c.

◆ search_for_ms()

static void search_for_ms ( AACEncContext * s,
ChannelElement * cpe )
static

Scout out next nonzero bands

Definition at line 695 of file aaccoder.c.

Variable Documentation

◆ esc_pow43

float esc_pow43[1<< 13]
static

Definition at line 65 of file aaccoder.c.

Referenced by ff_aac_coder_init_tables(), and quantize_and_encode_band_cost_template().

◆ quantize_and_encode_band_cost_arr

const quantize_and_encode_band_func quantize_and_encode_band_cost_arr[]
static
Initial value:
=
{
quantize_and_encode_band_cost_ZERO,
quantize_and_encode_band_cost_SQUAD,
quantize_and_encode_band_cost_SQUAD,
quantize_and_encode_band_cost_UQUAD,
quantize_and_encode_band_cost_UQUAD,
quantize_and_encode_band_cost_SPAIR,
quantize_and_encode_band_cost_SPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_ESC,
quantize_and_encode_band_cost_NONE,
quantize_and_encode_band_cost_NOISE,
quantize_and_encode_band_cost_STEREO,
quantize_and_encode_band_cost_STEREO,
}
quantize_and_encode_band_cost_NONE
static float quantize_and_encode_band_cost_NONE(struct AACEncContext *s, PutBitContext *pb, const float *in, float *quant, const float *scaled, int size, int scale_idx, int cb, const float lambda, const float uplim, int *bits, float *energy)
Definition aaccoder.c:204

Definition at line 237 of file aaccoder.c.

Referenced by ff_quantize_and_encode_band_cost(), and quantize_and_encode_band().

◆ quantize_and_encode_band_cost_rtz_arr

const quantize_and_encode_band_func quantize_and_encode_band_cost_rtz_arr[]
static
Initial value:
=
{
quantize_and_encode_band_cost_ZERO,
quantize_and_encode_band_cost_SQUAD,
quantize_and_encode_band_cost_SQUAD,
quantize_and_encode_band_cost_UQUAD,
quantize_and_encode_band_cost_UQUAD,
quantize_and_encode_band_cost_SPAIR,
quantize_and_encode_band_cost_SPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_ESC_RTZ,
quantize_and_encode_band_cost_NONE,
quantize_and_encode_band_cost_NOISE,
quantize_and_encode_band_cost_STEREO,
quantize_and_encode_band_cost_STEREO,
}

Definition at line 257 of file aaccoder.c.

Referenced by quantize_and_encode_band().

◆ ff_aac_coders

const AACCoefficientsEncoder ff_aac_coders[AAC_CODER_NB]

Definition at line 836 of file aaccoder.c.

Referenced by aac_encode_init().

Generated on Sun Nov 1 2026 19:21:13 for FFmpeg by doxygen 1.13.2